diff options
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/Kconfig | 28 | ||||
| -rw-r--r-- | drivers/usb/dwc3/Makefile | 47 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.c | 605 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 784 | ||||
| -rw-r--r-- | drivers/usb/dwc3/debug.h | 50 | ||||
| -rw-r--r-- | drivers/usb/dwc3/debugfs.c | 710 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-exynos.c | 151 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-omap.c | 392 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 173 | ||||
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 873 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 2396 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.h | 187 | ||||
| -rw-r--r-- | drivers/usb/dwc3/host.c | 102 | ||||
| -rw-r--r-- | drivers/usb/dwc3/io.h | 54 |
14 files changed, 6552 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig new file mode 100644 index 00000000..d8f741f9 --- /dev/null +++ b/drivers/usb/dwc3/Kconfig @@ -0,0 +1,28 @@ +config USB_DWC3 + tristate "DesignWare USB3 DRD Core Support" + depends on (USB && USB_GADGET) + select USB_OTG_UTILS + select USB_GADGET_DUALSPEED + select USB_GADGET_SUPERSPEED + select USB_XHCI_PLATFORM + help + Say Y or M here if your system has a Dual Role SuperSpeed + USB controller based on the DesignWare USB3 IP Core. + + If you choose to build this driver is a dynamically linked + module, the module will be called dwc3.ko. + +if USB_DWC3 + +config USB_DWC3_DEBUG + bool "Enable Debugging Messages" + help + Say Y here to enable debugging messages on DWC3 Driver. + +config USB_DWC3_VERBOSE + bool "Enable Verbose Debugging Messages" + depends on USB_DWC3_DEBUG + help + Say Y here to enable verbose debugging messages on DWC3 Driver. + +endif diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile new file mode 100644 index 00000000..d441fe4c --- /dev/null +++ b/drivers/usb/dwc3/Makefile @@ -0,0 +1,47 @@ +ccflags-$(CONFIG_USB_DWC3_DEBUG) := -DDEBUG +ccflags-$(CONFIG_USB_DWC3_VERBOSE) += -DVERBOSE_DEBUG + +obj-$(CONFIG_USB_DWC3) += dwc3.o + +dwc3-y := core.o +dwc3-y += host.o +dwc3-y += gadget.o ep0.o + +ifneq ($(CONFIG_DEBUG_FS),) + dwc3-y += debugfs.o +endif + +## +# Platform-specific glue layers go here +# +# NOTICE: Make sure your glue layer doesn't depend on anything +# which is arch-specific and that it compiles on all situations. +# +# We want to keep this requirement in order to be able to compile +# the entire driver (with all its glue layers) on several architectures +# and make sure it compiles fine. This will also help with allmodconfig +# and allyesconfig builds. +# +# The only exception is the PCI glue layer, but that's only because +# PCI doesn't provide nops if CONFIG_PCI isn't enabled. +## + +obj-$(CONFIG_USB_DWC3) += dwc3-omap.o + +## +# REVISIT Samsung Exynos platform needs the clk API which isn't +# defined on all architectures. If we allow dwc3-exynos.c compile +# always we will fail the linking phase on those architectures +# which don't provide clk api implementation and that's unnaceptable. +# +# When Samsung's platform start supporting pm_runtime, this check +# for HAVE_CLK should be removed. +## +ifneq ($(CONFIG_HAVE_CLK),) + obj-$(CONFIG_USB_DWC3) += dwc3-exynos.o +endif + +ifneq ($(CONFIG_PCI),) + obj-$(CONFIG_USB_DWC3) += dwc3-pci.o +endif + diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c new file mode 100644 index 00000000..99b58d84 --- /dev/null +++ b/drivers/usb/dwc3/core.c @@ -0,0 +1,605 @@ +/** + * core.c - DesignWare USB3 DRD Controller Core file + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/list.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/of.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +#include "core.h" +#include "gadget.h" +#include "io.h" + +#include "debug.h" + +static char *maximum_speed = "super"; +module_param(maximum_speed, charp, 0); +MODULE_PARM_DESC(maximum_speed, "Maximum supported speed."); + +/* -------------------------------------------------------------------------- */ + +#define DWC3_DEVS_POSSIBLE 32 + +static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE); + +int dwc3_get_device_id(void) +{ + int id; + +again: + id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE); + if (id < DWC3_DEVS_POSSIBLE) { + int old; + + old = test_and_set_bit(id, dwc3_devs); + if (old) + goto again; + } else { + pr_err("dwc3: no space for new device\n"); + id = -ENOMEM; + } + + return id; +} +EXPORT_SYMBOL_GPL(dwc3_get_device_id); + +void dwc3_put_device_id(int id) +{ + int ret; + + if (id < 0) + return; + + ret = test_bit(id, dwc3_devs); + WARN(!ret, "dwc3: ID %d not in use\n", id); + clear_bit(id, dwc3_devs); +} +EXPORT_SYMBOL_GPL(dwc3_put_device_id); + +void dwc3_set_mode(struct dwc3 *dwc, u32 mode) +{ + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); + reg |= DWC3_GCTL_PRTCAPDIR(mode); + dwc3_writel(dwc->regs, DWC3_GCTL, reg); +} + +/** + * dwc3_core_soft_reset - Issues core soft reset and PHY reset + * @dwc: pointer to our context structure + */ +static void dwc3_core_soft_reset(struct dwc3 *dwc) +{ + u32 reg; + + /* Before Resetting PHY, put Core in Reset */ + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + reg |= DWC3_GCTL_CORESOFTRESET; + dwc3_writel(dwc->regs, DWC3_GCTL, reg); + + /* Assert USB3 PHY reset */ + reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); + reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); + + /* Assert USB2 PHY reset */ + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + + mdelay(100); + + /* Clear USB3 PHY reset */ + reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); + reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); + + /* Clear USB2 PHY reset */ + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + + /* After PHYs are stable we can take Core out of reset state */ + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + reg &= ~DWC3_GCTL_CORESOFTRESET; + dwc3_writel(dwc->regs, DWC3_GCTL, reg); +} + +/** + * dwc3_free_one_event_buffer - Frees one event buffer + * @dwc: Pointer to our controller context structure + * @evt: Pointer to event buffer to be freed + */ +static void dwc3_free_one_event_buffer(struct dwc3 *dwc, + struct dwc3_event_buffer *evt) +{ + dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); + kfree(evt); +} + +/** + * dwc3_alloc_one_event_buffer - Allocates one event buffer structure + * @dwc: Pointer to our controller context structure + * @length: size of the event buffer + * + * Returns a pointer to the allocated event buffer structure on success + * otherwise ERR_PTR(errno). + */ +static struct dwc3_event_buffer *__devinit +dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length) +{ + struct dwc3_event_buffer *evt; + + evt = kzalloc(sizeof(*evt), GFP_KERNEL); + if (!evt) + return ERR_PTR(-ENOMEM); + + evt->dwc = dwc; + evt->length = length; + evt->buf = dma_alloc_coherent(dwc->dev, length, + &evt->dma, GFP_KERNEL); + if (!evt->buf) { + kfree(evt); + return ERR_PTR(-ENOMEM); + } + + return evt; +} + +/** + * dwc3_free_event_buffers - frees all allocated event buffers + * @dwc: Pointer to our controller context structure + */ +static void dwc3_free_event_buffers(struct dwc3 *dwc) +{ + struct dwc3_event_buffer *evt; + int i; + + for (i = 0; i < dwc->num_event_buffers; i++) { + evt = dwc->ev_buffs[i]; + if (evt) + dwc3_free_one_event_buffer(dwc, evt); + } + + kfree(dwc->ev_buffs); +} + +/** + * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length + * @dwc: pointer to our controller context structure + * @length: size of event buffer + * + * Returns 0 on success otherwise negative errno. In the error case, dwc + * may contain some buffers allocated but not all which were requested. + */ +static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) +{ + int num; + int i; + + num = DWC3_NUM_INT(dwc->hwparams.hwparams1); + dwc->num_event_buffers = num; + + dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL); + if (!dwc->ev_buffs) { + dev_err(dwc->dev, "can't allocate event buffers array\n"); + return -ENOMEM; + } + + for (i = 0; i < num; i++) { + struct dwc3_event_buffer *evt; + + evt = dwc3_alloc_one_event_buffer(dwc, length); + if (IS_ERR(evt)) { + dev_err(dwc->dev, "can't allocate event buffer\n"); + return PTR_ERR(evt); + } + dwc->ev_buffs[i] = evt; + } + + return 0; +} + +/** + * dwc3_event_buffers_setup - setup our allocated event buffers + * @dwc: pointer to our controller context structure + * + * Returns 0 on success otherwise negative errno. + */ +static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc) +{ + struct dwc3_event_buffer *evt; + int n; + + for (n = 0; n < dwc->num_event_buffers; n++) { + evt = dwc->ev_buffs[n]; + dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", + evt->buf, (unsigned long long) evt->dma, + evt->length); + + dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), + lower_32_bits(evt->dma)); + dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), + upper_32_bits(evt->dma)); + dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), + evt->length & 0xffff); + dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); + } + + return 0; +} + +static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) +{ + struct dwc3_event_buffer *evt; + int n; + + for (n = 0; n < dwc->num_event_buffers; n++) { + evt = dwc->ev_buffs[n]; + dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); + dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); + dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 0); + dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); + } +} + +static void __devinit dwc3_cache_hwparams(struct dwc3 *dwc) +{ + struct dwc3_hwparams *parms = &dwc->hwparams; + + parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); + parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); + parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); + parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); + parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); + parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); + parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); + parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); + parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); +} + +/** + * dwc3_core_init - Low-level initialization of DWC3 Core + * @dwc: Pointer to our controller context structure + * + * Returns 0 on success otherwise negative errno. + */ +static int __devinit dwc3_core_init(struct dwc3 *dwc) +{ + unsigned long timeout; + u32 reg; + int ret; + + reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); + /* This should read as U3 followed by revision number */ + if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { + dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); + ret = -ENODEV; + goto err0; + } + dwc->revision = reg; + + dwc3_core_soft_reset(dwc); + + /* issue device SoftReset too */ + timeout = jiffies + msecs_to_jiffies(500); + dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); + do { + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + if (!(reg & DWC3_DCTL_CSFTRST)) + break; + + if (time_after(jiffies, timeout)) { + dev_err(dwc->dev, "Reset Timed Out\n"); + ret = -ETIMEDOUT; + goto err0; + } + + cpu_relax(); + } while (true); + + dwc3_cache_hwparams(dwc); + + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + reg &= ~DWC3_GCTL_SCALEDOWN_MASK; + reg &= ~DWC3_GCTL_DISSCRAMBLE; + + switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { + case DWC3_GHWPARAMS1_EN_PWROPT_CLK: + reg &= ~DWC3_GCTL_DSBLCLKGTNG; + break; + default: + dev_dbg(dwc->dev, "No power optimization available\n"); + } + + /* + * WORKAROUND: DWC3 revisions <1.90a have a bug + * where the device can fail to connect at SuperSpeed + * and falls back to high-speed mode which causes + * the device to enter a Connect/Disconnect loop + */ + if (dwc->revision < DWC3_REVISION_190A) + reg |= DWC3_GCTL_U2RSTECN; + + dwc3_writel(dwc->regs, DWC3_GCTL, reg); + + ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); + if (ret) { + dev_err(dwc->dev, "failed to allocate event buffers\n"); + ret = -ENOMEM; + goto err1; + } + + ret = dwc3_event_buffers_setup(dwc); + if (ret) { + dev_err(dwc->dev, "failed to setup event buffers\n"); + goto err1; + } + + return 0; + +err1: + dwc3_free_event_buffers(dwc); + +err0: + return ret; +} + +static void dwc3_core_exit(struct dwc3 *dwc) +{ + dwc3_event_buffers_cleanup(dwc); + dwc3_free_event_buffers(dwc); +} + +#define DWC3_ALIGN_MASK (16 - 1) + +static int __devinit dwc3_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct resource *res; + struct dwc3 *dwc; + struct device *dev = &pdev->dev; + + int ret = -ENOMEM; + int irq; + + void __iomem *regs; + void *mem; + + u8 mode; + + mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); + if (!mem) { + dev_err(dev, "not enough memory\n"); + return -ENOMEM; + } + dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); + dwc->mem = mem; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "missing resource\n"); + return -ENODEV; + } + + dwc->res = res; + + res = devm_request_mem_region(dev, res->start, resource_size(res), + dev_name(dev)); + if (!res) { + dev_err(dev, "can't request mem region\n"); + return -ENOMEM; + } + + regs = devm_ioremap(dev, res->start, resource_size(res)); + if (!regs) { + dev_err(dev, "ioremap failed\n"); + return -ENOMEM; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "missing IRQ\n"); + return -ENODEV; + } + + spin_lock_init(&dwc->lock); + platform_set_drvdata(pdev, dwc); + + dwc->regs = regs; + dwc->regs_size = resource_size(res); + dwc->dev = dev; + dwc->irq = irq; + + if (!strncmp("super", maximum_speed, 5)) + dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; + else if (!strncmp("high", maximum_speed, 4)) + dwc->maximum_speed = DWC3_DCFG_HIGHSPEED; + else if (!strncmp("full", maximum_speed, 4)) + dwc->maximum_speed = DWC3_DCFG_FULLSPEED1; + else if (!strncmp("low", maximum_speed, 3)) + dwc->maximum_speed = DWC3_DCFG_LOWSPEED; + else + dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; + + if (of_get_property(node, "tx-fifo-resize", NULL)) + dwc->needs_fifo_resize = true; + + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + pm_runtime_forbid(dev); + + ret = dwc3_core_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize core\n"); + return ret; + } + + mode = DWC3_MODE(dwc->hwparams.hwparams0); + + switch (mode) { + case DWC3_MODE_DEVICE: + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); + ret = dwc3_gadget_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize gadget\n"); + goto err1; + } + break; + case DWC3_MODE_HOST: + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); + ret = dwc3_host_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize host\n"); + goto err1; + } + break; + case DWC3_MODE_DRD: + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); + ret = dwc3_host_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize host\n"); + goto err1; + } + + ret = dwc3_gadget_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize gadget\n"); + goto err1; + } + break; + default: + dev_err(dev, "Unsupported mode of operation %d\n", mode); + goto err1; + } + dwc->mode = mode; + + ret = dwc3_debugfs_init(dwc); + if (ret) { + dev_err(dev, "failed to initialize debugfs\n"); + goto err2; + } + + pm_runtime_allow(dev); + + return 0; + +err2: + switch (mode) { + case DWC3_MODE_DEVICE: + dwc3_gadget_exit(dwc); + break; + case DWC3_MODE_HOST: + dwc3_host_exit(dwc); + break; + case DWC3_MODE_DRD: + dwc3_host_exit(dwc); + dwc3_gadget_exit(dwc); + break; + default: + /* do nothing */ + break; + } + +err1: + dwc3_core_exit(dwc); + + return ret; +} + +static int __devexit dwc3_remove(struct platform_device *pdev) +{ + struct dwc3 *dwc = platform_get_drvdata(pdev); + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + dwc3_debugfs_exit(dwc); + + switch (dwc->mode) { + case DWC3_MODE_DEVICE: + dwc3_gadget_exit(dwc); + break; + case DWC3_MODE_HOST: + dwc3_host_exit(dwc); + break; + case DWC3_MODE_DRD: + dwc3_host_exit(dwc); + dwc3_gadget_exit(dwc); + break; + default: + /* do nothing */ + break; + } + + dwc3_core_exit(dwc); + + return 0; +} + +static struct platform_driver dwc3_driver = { + .probe = dwc3_probe, + .remove = __devexit_p(dwc3_remove), + .driver = { + .name = "dwc3", + }, +}; + +module_platform_driver(dwc3_driver); + +MODULE_ALIAS("platform:dwc3"); +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h new file mode 100644 index 00000000..6c7945b4 --- /dev/null +++ b/drivers/usb/dwc3/core.h @@ -0,0 +1,784 @@ +/** + * core.h - DesignWare USB3 DRD Core Header + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DRIVERS_USB_DWC3_CORE_H +#define __DRIVERS_USB_DWC3_CORE_H + +#include <linux/device.h> +#include <linux/spinlock.h> +#include <linux/ioport.h> +#include <linux/list.h> +#include <linux/dma-mapping.h> +#include <linux/mm.h> +#include <linux/debugfs.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +/* Global constants */ +#define DWC3_ENDPOINTS_NUM 32 + +#define DWC3_EVENT_BUFFERS_SIZE PAGE_SIZE +#define DWC3_EVENT_TYPE_MASK 0xfe + +#define DWC3_EVENT_TYPE_DEV 0 +#define DWC3_EVENT_TYPE_CARKIT 3 +#define DWC3_EVENT_TYPE_I2C 4 + +#define DWC3_DEVICE_EVENT_DISCONNECT 0 +#define DWC3_DEVICE_EVENT_RESET 1 +#define DWC3_DEVICE_EVENT_CONNECT_DONE 2 +#define DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE 3 +#define DWC3_DEVICE_EVENT_WAKEUP 4 +#define DWC3_DEVICE_EVENT_EOPF 6 +#define DWC3_DEVICE_EVENT_SOF 7 +#define DWC3_DEVICE_EVENT_ERRATIC_ERROR 9 +#define DWC3_DEVICE_EVENT_CMD_CMPL 10 +#define DWC3_DEVICE_EVENT_OVERFLOW 11 + +#define DWC3_GEVNTCOUNT_MASK 0xfffc +#define DWC3_GSNPSID_MASK 0xffff0000 +#define DWC3_GSNPSREV_MASK 0xffff + +/* Global Registers */ +#define DWC3_GSBUSCFG0 0xc100 +#define DWC3_GSBUSCFG1 0xc104 +#define DWC3_GTXTHRCFG 0xc108 +#define DWC3_GRXTHRCFG 0xc10c +#define DWC3_GCTL 0xc110 +#define DWC3_GEVTEN 0xc114 +#define DWC3_GSTS 0xc118 +#define DWC3_GSNPSID 0xc120 +#define DWC3_GGPIO 0xc124 +#define DWC3_GUID 0xc128 +#define DWC3_GUCTL 0xc12c +#define DWC3_GBUSERRADDR0 0xc130 +#define DWC3_GBUSERRADDR1 0xc134 +#define DWC3_GPRTBIMAP0 0xc138 +#define DWC3_GPRTBIMAP1 0xc13c +#define DWC3_GHWPARAMS0 0xc140 +#define DWC3_GHWPARAMS1 0xc144 +#define DWC3_GHWPARAMS2 0xc148 +#define DWC3_GHWPARAMS3 0xc14c +#define DWC3_GHWPARAMS4 0xc150 +#define DWC3_GHWPARAMS5 0xc154 +#define DWC3_GHWPARAMS6 0xc158 +#define DWC3_GHWPARAMS7 0xc15c +#define DWC3_GDBGFIFOSPACE 0xc160 +#define DWC3_GDBGLTSSM 0xc164 +#define DWC3_GPRTBIMAP_HS0 0xc180 +#define DWC3_GPRTBIMAP_HS1 0xc184 +#define DWC3_GPRTBIMAP_FS0 0xc188 +#define DWC3_GPRTBIMAP_FS1 0xc18c + +#define DWC3_GUSB2PHYCFG(n) (0xc200 + (n * 0x04)) +#define DWC3_GUSB2I2CCTL(n) (0xc240 + (n * 0x04)) + +#define DWC3_GUSB2PHYACC(n) (0xc280 + (n * 0x04)) + +#define DWC3_GUSB3PIPECTL(n) (0xc2c0 + (n * 0x04)) + +#define DWC3_GTXFIFOSIZ(n) (0xc300 + (n * 0x04)) +#define DWC3_GRXFIFOSIZ(n) (0xc380 + (n * 0x04)) + +#define DWC3_GEVNTADRLO(n) (0xc400 + (n * 0x10)) +#define DWC3_GEVNTADRHI(n) (0xc404 + (n * 0x10)) +#define DWC3_GEVNTSIZ(n) (0xc408 + (n * 0x10)) +#define DWC3_GEVNTCOUNT(n) (0xc40c + (n * 0x10)) + +#define DWC3_GHWPARAMS8 0xc600 + +/* Device Registers */ +#define DWC3_DCFG 0xc700 +#define DWC3_DCTL 0xc704 +#define DWC3_DEVTEN 0xc708 +#define DWC3_DSTS 0xc70c +#define DWC3_DGCMDPAR 0xc710 +#define DWC3_DGCMD 0xc714 +#define DWC3_DALEPENA 0xc720 +#define DWC3_DEPCMDPAR2(n) (0xc800 + (n * 0x10)) +#define DWC3_DEPCMDPAR1(n) (0xc804 + (n * 0x10)) +#define DWC3_DEPCMDPAR0(n) (0xc808 + (n * 0x10)) +#define DWC3_DEPCMD(n) (0xc80c + (n * 0x10)) + +/* OTG Registers */ +#define DWC3_OCFG 0xcc00 +#define DWC3_OCTL 0xcc04 +#define DWC3_OEVTEN 0xcc08 +#define DWC3_OSTS 0xcc0C + +/* Bit fields */ + +/* Global Configuration Register */ +#define DWC3_GCTL_PWRDNSCALE(n) ((n) << 19) +#define DWC3_GCTL_U2RSTECN (1 << 16) +#define DWC3_GCTL_RAMCLKSEL(x) (((x) & DWC3_GCTL_CLK_MASK) << 6) +#define DWC3_GCTL_CLK_BUS (0) +#define DWC3_GCTL_CLK_PIPE (1) +#define DWC3_GCTL_CLK_PIPEHALF (2) +#define DWC3_GCTL_CLK_MASK (3) + +#define DWC3_GCTL_PRTCAP(n) (((n) & (3 << 12)) >> 12) +#define DWC3_GCTL_PRTCAPDIR(n) ((n) << 12) +#define DWC3_GCTL_PRTCAP_HOST 1 +#define DWC3_GCTL_PRTCAP_DEVICE 2 +#define DWC3_GCTL_PRTCAP_OTG 3 + +#define DWC3_GCTL_CORESOFTRESET (1 << 11) +#define DWC3_GCTL_SCALEDOWN(n) ((n) << 4) +#define DWC3_GCTL_SCALEDOWN_MASK DWC3_GCTL_SCALEDOWN(3) +#define DWC3_GCTL_DISSCRAMBLE (1 << 3) +#define DWC3_GCTL_DSBLCLKGTNG (1 << 0) + +/* Global USB2 PHY Configuration Register */ +#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31) +#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6) + +/* Global USB3 PIPE Control Register */ +#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31) +#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17) + +/* Global TX Fifo Size Register */ +#define DWC3_GTXFIFOSIZ_TXFDEF(n) ((n) & 0xffff) +#define DWC3_GTXFIFOSIZ_TXFSTADDR(n) ((n) & 0xffff0000) + +/* Global HWPARAMS1 Register */ +#define DWC3_GHWPARAMS1_EN_PWROPT(n) (((n) & (3 << 24)) >> 24) +#define DWC3_GHWPARAMS1_EN_PWROPT_NO 0 +#define DWC3_GHWPARAMS1_EN_PWROPT_CLK 1 + +/* Device Configuration Register */ +#define DWC3_DCFG_DEVADDR(addr) ((addr) << 3) +#define DWC3_DCFG_DEVADDR_MASK DWC3_DCFG_DEVADDR(0x7f) + +#define DWC3_DCFG_SPEED_MASK (7 << 0) +#define DWC3_DCFG_SUPERSPEED (4 << 0) +#define DWC3_DCFG_HIGHSPEED (0 << 0) +#define DWC3_DCFG_FULLSPEED2 (1 << 0) +#define DWC3_DCFG_LOWSPEED (2 << 0) +#define DWC3_DCFG_FULLSPEED1 (3 << 0) + +/* Device Control Register */ +#define DWC3_DCTL_RUN_STOP (1 << 31) +#define DWC3_DCTL_CSFTRST (1 << 30) +#define DWC3_DCTL_LSFTRST (1 << 29) + +#define DWC3_DCTL_HIRD_THRES_MASK (0x1f << 24) +#define DWC3_DCTL_HIRD_THRES(n) (((n) & DWC3_DCTL_HIRD_THRES_MASK) >> 24) + +#define DWC3_DCTL_APPL1RES (1 << 23) + +#define DWC3_DCTL_TRGTULST_MASK (0x0f << 17) +#define DWC3_DCTL_TRGTULST(n) ((n) << 17) + +#define DWC3_DCTL_TRGTULST_U2 (DWC3_DCTL_TRGTULST(2)) +#define DWC3_DCTL_TRGTULST_U3 (DWC3_DCTL_TRGTULST(3)) +#define DWC3_DCTL_TRGTULST_SS_DIS (DWC3_DCTL_TRGTULST(4)) +#define DWC3_DCTL_TRGTULST_RX_DET (DWC3_DCTL_TRGTULST(5)) +#define DWC3_DCTL_TRGTULST_SS_INACT (DWC3_DCTL_TRGTULST(6)) + +#define DWC3_DCTL_INITU2ENA (1 << 12) +#define DWC3_DCTL_ACCEPTU2ENA (1 << 11) +#define DWC3_DCTL_INITU1ENA (1 << 10) +#define DWC3_DCTL_ACCEPTU1ENA (1 << 9) +#define DWC3_DCTL_TSTCTRL_MASK (0xf << 1) + +#define DWC3_DCTL_ULSTCHNGREQ_MASK (0x0f << 5) +#define DWC3_DCTL_ULSTCHNGREQ(n) (((n) << 5) & DWC3_DCTL_ULSTCHNGREQ_MASK) + +#define DWC3_DCTL_ULSTCHNG_NO_ACTION (DWC3_DCTL_ULSTCHNGREQ(0)) +#define DWC3_DCTL_ULSTCHNG_SS_DISABLED (DWC3_DCTL_ULSTCHNGREQ(4)) +#define DWC3_DCTL_ULSTCHNG_RX_DETECT (DWC3_DCTL_ULSTCHNGREQ(5)) +#define DWC3_DCTL_ULSTCHNG_SS_INACTIVE (DWC3_DCTL_ULSTCHNGREQ(6)) +#define DWC3_DCTL_ULSTCHNG_RECOVERY (DWC3_DCTL_ULSTCHNGREQ(8)) +#define DWC3_DCTL_ULSTCHNG_COMPLIANCE (DWC3_DCTL_ULSTCHNGREQ(10)) +#define DWC3_DCTL_ULSTCHNG_LOOPBACK (DWC3_DCTL_ULSTCHNGREQ(11)) + +/* Device Event Enable Register */ +#define DWC3_DEVTEN_VNDRDEVTSTRCVEDEN (1 << 12) +#define DWC3_DEVTEN_EVNTOVERFLOWEN (1 << 11) +#define DWC3_DEVTEN_CMDCMPLTEN (1 << 10) +#define DWC3_DEVTEN_ERRTICERREN (1 << 9) +#define DWC3_DEVTEN_SOFEN (1 << 7) +#define DWC3_DEVTEN_EOPFEN (1 << 6) +#define DWC3_DEVTEN_WKUPEVTEN (1 << 4) +#define DWC3_DEVTEN_ULSTCNGEN (1 << 3) +#define DWC3_DEVTEN_CONNECTDONEEN (1 << 2) +#define DWC3_DEVTEN_USBRSTEN (1 << 1) +#define DWC3_DEVTEN_DISCONNEVTEN (1 << 0) + +/* Device Status Register */ +#define DWC3_DSTS_PWRUPREQ (1 << 24) +#define DWC3_DSTS_COREIDLE (1 << 23) +#define DWC3_DSTS_DEVCTRLHLT (1 << 22) + +#define DWC3_DSTS_USBLNKST_MASK (0x0f << 18) +#define DWC3_DSTS_USBLNKST(n) (((n) & DWC3_DSTS_USBLNKST_MASK) >> 18) + +#define DWC3_DSTS_RXFIFOEMPTY (1 << 17) + +#define DWC3_DSTS_SOFFN_MASK (0x3ff << 3) +#define DWC3_DSTS_SOFFN(n) (((n) & DWC3_DSTS_SOFFN_MASK) >> 3) + +#define DWC3_DSTS_CONNECTSPD (7 << 0) + +#define DWC3_DSTS_SUPERSPEED (4 << 0) +#define DWC3_DSTS_HIGHSPEED (0 << 0) +#define DWC3_DSTS_FULLSPEED2 (1 << 0) +#define DWC3_DSTS_LOWSPEED (2 << 0) +#define DWC3_DSTS_FULLSPEED1 (3 << 0) + +/* Device Generic Command Register */ +#define DWC3_DGCMD_SET_LMP 0x01 +#define DWC3_DGCMD_SET_PERIODIC_PAR 0x02 +#define DWC3_DGCMD_XMIT_FUNCTION 0x03 +#define DWC3_DGCMD_SELECTED_FIFO_FLUSH 0x09 +#define DWC3_DGCMD_ALL_FIFO_FLUSH 0x0a +#define DWC3_DGCMD_SET_ENDPOINT_NRDY 0x0c +#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK 0x10 + +/* Device Endpoint Command Register */ +#define DWC3_DEPCMD_PARAM_SHIFT 16 +#define DWC3_DEPCMD_PARAM(x) ((x) << DWC3_DEPCMD_PARAM_SHIFT) +#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f) +#define DWC3_DEPCMD_STATUS_MASK (0x0f << 12) +#define DWC3_DEPCMD_STATUS(x) (((x) & DWC3_DEPCMD_STATUS_MASK) >> 12) +#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11) +#define DWC3_DEPCMD_CMDACT (1 << 10) +#define DWC3_DEPCMD_CMDIOC (1 << 8) + +#define DWC3_DEPCMD_DEPSTARTCFG (0x09 << 0) +#define DWC3_DEPCMD_ENDTRANSFER (0x08 << 0) +#define DWC3_DEPCMD_UPDATETRANSFER (0x07 << 0) +#define DWC3_DEPCMD_STARTTRANSFER (0x06 << 0) +#define DWC3_DEPCMD_CLEARSTALL (0x05 << 0) +#define DWC3_DEPCMD_SETSTALL (0x04 << 0) +#define DWC3_DEPCMD_GETSEQNUMBER (0x03 << 0) +#define DWC3_DEPCMD_SETTRANSFRESOURCE (0x02 << 0) +#define DWC3_DEPCMD_SETEPCONFIG (0x01 << 0) + +/* The EP number goes 0..31 so ep0 is always out and ep1 is always in */ +#define DWC3_DALEPENA_EP(n) (1 << n) + +#define DWC3_DEPCMD_TYPE_CONTROL 0 +#define DWC3_DEPCMD_TYPE_ISOC 1 +#define DWC3_DEPCMD_TYPE_BULK 2 +#define DWC3_DEPCMD_TYPE_INTR 3 + +/* Structures */ + +struct dwc3_trb; + +/** + * struct dwc3_event_buffer - Software event buffer representation + * @list: a list of event buffers + * @buf: _THE_ buffer + * @length: size of this buffer + * @dma: dma_addr_t + * @dwc: pointer to DWC controller + */ +struct dwc3_event_buffer { + void *buf; + unsigned length; + unsigned int lpos; + + dma_addr_t dma; + + struct dwc3 *dwc; +}; + +#define DWC3_EP_FLAG_STALLED (1 << 0) +#define DWC3_EP_FLAG_WEDGED (1 << 1) + +#define DWC3_EP_DIRECTION_TX true +#define DWC3_EP_DIRECTION_RX false + +#define DWC3_TRB_NUM 32 +#define DWC3_TRB_MASK (DWC3_TRB_NUM - 1) + +/** + * struct dwc3_ep - device side endpoint representation + * @endpoint: usb endpoint + * @request_list: list of requests for this endpoint + * @req_queued: list of requests on this ep which have TRBs setup + * @trb_pool: array of transaction buffers + * @trb_pool_dma: dma address of @trb_pool + * @free_slot: next slot which is going to be used + * @busy_slot: first slot which is owned by HW + * @desc: usb_endpoint_descriptor pointer + * @dwc: pointer to DWC controller + * @flags: endpoint flags (wedged, stalled, ...) + * @current_trb: index of current used trb + * @number: endpoint number (1 - 15) + * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK + * @res_trans_idx: Resource transfer index + * @interval: the intervall on which the ISOC transfer is started + * @name: a human readable name e.g. ep1out-bulk + * @direction: true for TX, false for RX + * @stream_capable: true when streams are enabled + */ +struct dwc3_ep { + struct usb_ep endpoint; + struct list_head request_list; + struct list_head req_queued; + + struct dwc3_trb *trb_pool; + dma_addr_t trb_pool_dma; + u32 free_slot; + u32 busy_slot; + const struct usb_endpoint_descriptor *desc; + const struct usb_ss_ep_comp_descriptor *comp_desc; + struct dwc3 *dwc; + + unsigned flags; +#define DWC3_EP_ENABLED (1 << 0) +#define DWC3_EP_STALL (1 << 1) +#define DWC3_EP_WEDGE (1 << 2) +#define DWC3_EP_BUSY (1 << 4) +#define DWC3_EP_PENDING_REQUEST (1 << 5) + + /* This last one is specific to EP0 */ +#define DWC3_EP0_DIR_IN (1 << 31) + + unsigned current_trb; + + u8 number; + u8 type; + u8 res_trans_idx; + u32 interval; + + char name[20]; + + unsigned direction:1; + unsigned stream_capable:1; +}; + +enum dwc3_phy { + DWC3_PHY_UNKNOWN = 0, + DWC3_PHY_USB3, + DWC3_PHY_USB2, +}; + +enum dwc3_ep0_next { + DWC3_EP0_UNKNOWN = 0, + DWC3_EP0_COMPLETE, + DWC3_EP0_NRDY_SETUP, + DWC3_EP0_NRDY_DATA, + DWC3_EP0_NRDY_STATUS, +}; + +enum dwc3_ep0_state { + EP0_UNCONNECTED = 0, + EP0_SETUP_PHASE, + EP0_DATA_PHASE, + EP0_STATUS_PHASE, +}; + +enum dwc3_link_state { + /* In SuperSpeed */ + DWC3_LINK_STATE_U0 = 0x00, /* in HS, means ON */ + DWC3_LINK_STATE_U1 = 0x01, + DWC3_LINK_STATE_U2 = 0x02, /* in HS, means SLEEP */ + DWC3_LINK_STATE_U3 = 0x03, /* in HS, means SUSPEND */ + DWC3_LINK_STATE_SS_DIS = 0x04, + DWC3_LINK_STATE_RX_DET = 0x05, /* in HS, means Early Suspend */ + DWC3_LINK_STATE_SS_INACT = 0x06, + DWC3_LINK_STATE_POLL = 0x07, + DWC3_LINK_STATE_RECOV = 0x08, + DWC3_LINK_STATE_HRESET = 0x09, + DWC3_LINK_STATE_CMPLY = 0x0a, + DWC3_LINK_STATE_LPBK = 0x0b, + DWC3_LINK_STATE_MASK = 0x0f, +}; + +enum dwc3_device_state { + DWC3_DEFAULT_STATE, + DWC3_ADDRESS_STATE, + DWC3_CONFIGURED_STATE, +}; + +/* TRB Length, PCM and Status */ +#define DWC3_TRB_SIZE_MASK (0x00ffffff) +#define DWC3_TRB_SIZE_LENGTH(n) ((n) & DWC3_TRB_SIZE_MASK) +#define DWC3_TRB_SIZE_PCM1(n) (((n) & 0x03) << 24) +#define DWC3_TRB_SIZE_TRBSTS(n) (((n) & (0x0f << 28) >> 28)) + +#define DWC3_TRBSTS_OK 0 +#define DWC3_TRBSTS_MISSED_ISOC 1 +#define DWC3_TRBSTS_SETUP_PENDING 2 + +/* TRB Control */ +#define DWC3_TRB_CTRL_HWO (1 << 0) +#define DWC3_TRB_CTRL_LST (1 << 1) +#define DWC3_TRB_CTRL_CHN (1 << 2) +#define DWC3_TRB_CTRL_CSP (1 << 3) +#define DWC3_TRB_CTRL_TRBCTL(n) (((n) & 0x3f) << 4) +#define DWC3_TRB_CTRL_ISP_IMI (1 << 10) +#define DWC3_TRB_CTRL_IOC (1 << 11) +#define DWC3_TRB_CTRL_SID_SOFN(n) (((n) & 0xffff) << 14) + +#define DWC3_TRBCTL_NORMAL DWC3_TRB_CTRL_TRBCTL(1) +#define DWC3_TRBCTL_CONTROL_SETUP DWC3_TRB_CTRL_TRBCTL(2) +#define DWC3_TRBCTL_CONTROL_STATUS2 DWC3_TRB_CTRL_TRBCTL(3) +#define DWC3_TRBCTL_CONTROL_STATUS3 DWC3_TRB_CTRL_TRBCTL(4) +#define DWC3_TRBCTL_CONTROL_DATA DWC3_TRB_CTRL_TRBCTL(5) +#define DWC3_TRBCTL_ISOCHRONOUS_FIRST DWC3_TRB_CTRL_TRBCTL(6) +#define DWC3_TRBCTL_ISOCHRONOUS DWC3_TRB_CTRL_TRBCTL(7) +#define DWC3_TRBCTL_LINK_TRB DWC3_TRB_CTRL_TRBCTL(8) + +/** + * struct dwc3_trb - transfer request block (hw format) + * @bpl: DW0-3 + * @bph: DW4-7 + * @size: DW8-B + * @trl: DWC-F + */ +struct dwc3_trb { + u32 bpl; + u32 bph; + u32 size; + u32 ctrl; +} __packed; + +/** + * dwc3_hwparams - copy of HWPARAMS registers + * @hwparams0 - GHWPARAMS0 + * @hwparams1 - GHWPARAMS1 + * @hwparams2 - GHWPARAMS2 + * @hwparams3 - GHWPARAMS3 + * @hwparams4 - GHWPARAMS4 + * @hwparams5 - GHWPARAMS5 + * @hwparams6 - GHWPARAMS6 + * @hwparams7 - GHWPARAMS7 + * @hwparams8 - GHWPARAMS8 + */ +struct dwc3_hwparams { + u32 hwparams0; + u32 hwparams1; + u32 hwparams2; + u32 hwparams3; + u32 hwparams4; + u32 hwparams5; + u32 hwparams6; + u32 hwparams7; + u32 hwparams8; +}; + +/* HWPARAMS0 */ +#define DWC3_MODE(n) ((n) & 0x7) + +#define DWC3_MODE_DEVICE 0 +#define DWC3_MODE_HOST 1 +#define DWC3_MODE_DRD 2 +#define DWC3_MODE_HUB 3 + +#define DWC3_MDWIDTH(n) (((n) & 0xff00) >> 8) + +/* HWPARAMS1 */ +#define DWC3_NUM_INT(n) (((n) & (0x3f << 15)) >> 15) + +/* HWPARAMS7 */ +#define DWC3_RAM1_DEPTH(n) ((n) & 0xffff) + +struct dwc3_request { + struct usb_request request; + struct list_head list; + struct dwc3_ep *dep; + + u8 epnum; + struct dwc3_trb *trb; + dma_addr_t trb_dma; + + unsigned direction:1; + unsigned mapped:1; + unsigned queued:1; +}; + +/** + * struct dwc3 - representation of our controller + * @ctrl_req: usb control request which is used for ep0 + * @ep0_trb: trb which is used for the ctrl_req + * @ep0_bounce: bounce buffer for ep0 + * @setup_buf: used while precessing STD USB requests + * @ctrl_req_addr: dma address of ctrl_req + * @ep0_trb: dma address of ep0_trb + * @ep0_usb_req: dummy req used while handling STD USB requests + * @ep0_bounce_addr: dma address of ep0_bounce + * @lock: for synchronizing + * @dev: pointer to our struct device + * @xhci: pointer to our xHCI child + * @event_buffer_list: a list of event buffers + * @gadget: device side representation of the peripheral controller + * @gadget_driver: pointer to the gadget driver + * @regs: base address for our registers + * @regs_size: address space size + * @irq: IRQ number + * @num_event_buffers: calculated number of event buffers + * @u1u2: only used on revisions <1.83a for workaround + * @maximum_speed: maximum speed requested (mainly for testing purposes) + * @revision: revision register contents + * @mode: mode of operation + * @is_selfpowered: true when we are selfpowered + * @three_stage_setup: set if we perform a three phase setup + * @ep0_bounced: true when we used bounce buffer + * @ep0_expect_in: true when we expect a DATA IN transfer + * @start_config_issued: true when StartConfig command has been issued + * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround + * @needs_fifo_resize: not all users might want fifo resizing, flag it + * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes. + * @ep0_next_event: hold the next expected event + * @ep0state: state of endpoint zero + * @link_state: link state + * @speed: device speed (super, high, full, low) + * @mem: points to start of memory which is used for this struct. + * @hwparams: copy of hwparams registers + * @root: debugfs root folder pointer + */ +struct dwc3 { + struct usb_ctrlrequest *ctrl_req; + struct dwc3_trb *ep0_trb; + void *ep0_bounce; + u8 *setup_buf; + dma_addr_t ctrl_req_addr; + dma_addr_t ep0_trb_addr; + dma_addr_t ep0_bounce_addr; + struct dwc3_request ep0_usb_req; + /* device lock */ + spinlock_t lock; + struct device *dev; + + struct platform_device *xhci; + struct resource *res; + + struct dwc3_event_buffer **ev_buffs; + struct dwc3_ep *eps[DWC3_ENDPOINTS_NUM]; + + struct usb_gadget gadget; + struct usb_gadget_driver *gadget_driver; + + void __iomem *regs; + size_t regs_size; + + int irq; + + u32 num_event_buffers; + u32 u1u2; + u32 maximum_speed; + u32 revision; + u32 mode; + +#define DWC3_REVISION_173A 0x5533173a +#define DWC3_REVISION_175A 0x5533175a +#define DWC3_REVISION_180A 0x5533180a +#define DWC3_REVISION_183A 0x5533183a +#define DWC3_REVISION_185A 0x5533185a +#define DWC3_REVISION_188A 0x5533188a +#define DWC3_REVISION_190A 0x5533190a + + unsigned is_selfpowered:1; + unsigned three_stage_setup:1; + unsigned ep0_bounced:1; + unsigned ep0_expect_in:1; + unsigned start_config_issued:1; + unsigned setup_packet_pending:1; + unsigned delayed_status:1; + unsigned needs_fifo_resize:1; + unsigned resize_fifos:1; + + enum dwc3_ep0_next ep0_next_event; + enum dwc3_ep0_state ep0state; + enum dwc3_link_state link_state; + enum dwc3_device_state dev_state; + + u8 speed; + void *mem; + + struct dwc3_hwparams hwparams; + struct dentry *root; + + u8 test_mode; + u8 test_mode_nr; +}; + +/* -------------------------------------------------------------------------- */ + +/* -------------------------------------------------------------------------- */ + +struct dwc3_event_type { + u32 is_devspec:1; + u32 type:6; + u32 reserved8_31:25; +} __packed; + +#define DWC3_DEPEVT_XFERCOMPLETE 0x01 +#define DWC3_DEPEVT_XFERINPROGRESS 0x02 +#define DWC3_DEPEVT_XFERNOTREADY 0x03 +#define DWC3_DEPEVT_RXTXFIFOEVT 0x04 +#define DWC3_DEPEVT_STREAMEVT 0x06 +#define DWC3_DEPEVT_EPCMDCMPLT 0x07 + +/** + * struct dwc3_event_depvt - Device Endpoint Events + * @one_bit: indicates this is an endpoint event (not used) + * @endpoint_number: number of the endpoint + * @endpoint_event: The event we have: + * 0x00 - Reserved + * 0x01 - XferComplete + * 0x02 - XferInProgress + * 0x03 - XferNotReady + * 0x04 - RxTxFifoEvt (IN->Underrun, OUT->Overrun) + * 0x05 - Reserved + * 0x06 - StreamEvt + * 0x07 - EPCmdCmplt + * @reserved11_10: Reserved, don't use. + * @status: Indicates the status of the event. Refer to databook for + * more information. + * @parameters: Parameters of the current event. Refer to databook for + * more information. + */ +struct dwc3_event_depevt { + u32 one_bit:1; + u32 endpoint_number:5; + u32 endpoint_event:4; + u32 reserved11_10:2; + u32 status:4; + +/* Within XferNotReady */ +#define DEPEVT_STATUS_TRANSFER_ACTIVE (1 << 3) + +/* Within XferComplete */ +#define DEPEVT_STATUS_BUSERR (1 << 0) +#define DEPEVT_STATUS_SHORT (1 << 1) +#define DEPEVT_STATUS_IOC (1 << 2) +#define DEPEVT_STATUS_LST (1 << 3) + +/* Stream event only */ +#define DEPEVT_STREAMEVT_FOUND 1 +#define DEPEVT_STREAMEVT_NOTFOUND 2 + +/* Control-only Status */ +#define DEPEVT_STATUS_CONTROL_SETUP 0 +#define DEPEVT_STATUS_CONTROL_DATA 1 +#define DEPEVT_STATUS_CONTROL_STATUS 2 + + u32 parameters:16; +} __packed; + +/** + * struct dwc3_event_devt - Device Events + * @one_bit: indicates this is a non-endpoint event (not used) + * @device_event: indicates it's a device event. Should read as 0x00 + * @type: indicates the type of device event. + * 0 - DisconnEvt + * 1 - USBRst + * 2 - ConnectDone + * 3 - ULStChng + * 4 - WkUpEvt + * 5 - Reserved + * 6 - EOPF + * 7 - SOF + * 8 - Reserved + * 9 - ErrticErr + * 10 - CmdCmplt + * 11 - EvntOverflow + * 12 - VndrDevTstRcved + * @reserved15_12: Reserved, not used + * @event_info: Information about this event + * @reserved31_24: Reserved, not used + */ +struct dwc3_event_devt { + u32 one_bit:1; + u32 device_event:7; + u32 type:4; + u32 reserved15_12:4; + u32 event_info:8; + u32 reserved31_24:8; +} __packed; + +/** + * struct dwc3_event_gevt - Other Core Events + * @one_bit: indicates this is a non-endpoint event (not used) + * @device_event: indicates it's (0x03) Carkit or (0x04) I2C event. + * @phy_port_number: self-explanatory + * @reserved31_12: Reserved, not used. + */ +struct dwc3_event_gevt { + u32 one_bit:1; + u32 device_event:7; + u32 phy_port_number:4; + u32 reserved31_12:20; +} __packed; + +/** + * union dwc3_event - representation of Event Buffer contents + * @raw: raw 32-bit event + * @type: the type of the event + * @depevt: Device Endpoint Event + * @devt: Device Event + * @gevt: Global Event + */ +union dwc3_event { + u32 raw; + struct dwc3_event_type type; + struct dwc3_event_depevt depevt; + struct dwc3_event_devt devt; + struct dwc3_event_gevt gevt; +}; + +/* + * DWC3 Features to be used as Driver Data + */ + +#define DWC3_HAS_PERIPHERAL BIT(0) +#define DWC3_HAS_XHCI BIT(1) +#define DWC3_HAS_OTG BIT(3) + +/* prototypes */ +void dwc3_set_mode(struct dwc3 *dwc, u32 mode); +int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc); + +int dwc3_host_init(struct dwc3 *dwc); +void dwc3_host_exit(struct dwc3 *dwc); + +int dwc3_gadget_init(struct dwc3 *dwc); +void dwc3_gadget_exit(struct dwc3 *dwc); + +extern int dwc3_get_device_id(void); +extern void dwc3_put_device_id(int id); + +#endif /* __DRIVERS_USB_DWC3_CORE_H */ diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h new file mode 100644 index 00000000..5894ee82 --- /dev/null +++ b/drivers/usb/dwc3/debug.h @@ -0,0 +1,50 @@ +/** + * debug.h - DesignWare USB3 DRD Controller Debug Header + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "core.h" + +#ifdef CONFIG_DEBUG_FS +extern int dwc3_debugfs_init(struct dwc3 *); +extern void dwc3_debugfs_exit(struct dwc3 *); +#else +static inline int dwc3_debugfs_init(struct dwc3 *d) +{ return 0; } +static inline void dwc3_debugfs_exit(struct dwc3 *d) +{ } +#endif + diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c new file mode 100644 index 00000000..d4a30f11 --- /dev/null +++ b/drivers/usb/dwc3/debugfs.c @@ -0,0 +1,710 @@ +/** + * debugfs.c - DesignWare USB3 DRD Controller DebugFS file + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/ptrace.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/delay.h> +#include <linux/uaccess.h> + +#include <linux/usb/ch9.h> + +#include "core.h" +#include "gadget.h" +#include "io.h" +#include "debug.h" + +#define dump_register(nm) \ +{ \ + .name = __stringify(nm), \ + .offset = DWC3_ ##nm, \ +} + +static const struct debugfs_reg32 dwc3_regs[] = { + dump_register(GSBUSCFG0), + dump_register(GSBUSCFG1), + dump_register(GTXTHRCFG), + dump_register(GRXTHRCFG), + dump_register(GCTL), + dump_register(GEVTEN), + dump_register(GSTS), + dump_register(GSNPSID), + dump_register(GGPIO), + dump_register(GUID), + dump_register(GUCTL), + dump_register(GBUSERRADDR0), + dump_register(GBUSERRADDR1), + dump_register(GPRTBIMAP0), + dump_register(GPRTBIMAP1), + dump_register(GHWPARAMS0), + dump_register(GHWPARAMS1), + dump_register(GHWPARAMS2), + dump_register(GHWPARAMS3), + dump_register(GHWPARAMS4), + dump_register(GHWPARAMS5), + dump_register(GHWPARAMS6), + dump_register(GHWPARAMS7), + dump_register(GDBGFIFOSPACE), + dump_register(GDBGLTSSM), + dump_register(GPRTBIMAP_HS0), + dump_register(GPRTBIMAP_HS1), + dump_register(GPRTBIMAP_FS0), + dump_register(GPRTBIMAP_FS1), + + dump_register(GUSB2PHYCFG(0)), + dump_register(GUSB2PHYCFG(1)), + dump_register(GUSB2PHYCFG(2)), + dump_register(GUSB2PHYCFG(3)), + dump_register(GUSB2PHYCFG(4)), + dump_register(GUSB2PHYCFG(5)), + dump_register(GUSB2PHYCFG(6)), + dump_register(GUSB2PHYCFG(7)), + dump_register(GUSB2PHYCFG(8)), + dump_register(GUSB2PHYCFG(9)), + dump_register(GUSB2PHYCFG(10)), + dump_register(GUSB2PHYCFG(11)), + dump_register(GUSB2PHYCFG(12)), + dump_register(GUSB2PHYCFG(13)), + dump_register(GUSB2PHYCFG(14)), + dump_register(GUSB2PHYCFG(15)), + + dump_register(GUSB2I2CCTL(0)), + dump_register(GUSB2I2CCTL(1)), + dump_register(GUSB2I2CCTL(2)), + dump_register(GUSB2I2CCTL(3)), + dump_register(GUSB2I2CCTL(4)), + dump_register(GUSB2I2CCTL(5)), + dump_register(GUSB2I2CCTL(6)), + dump_register(GUSB2I2CCTL(7)), + dump_register(GUSB2I2CCTL(8)), + dump_register(GUSB2I2CCTL(9)), + dump_register(GUSB2I2CCTL(10)), + dump_register(GUSB2I2CCTL(11)), + dump_register(GUSB2I2CCTL(12)), + dump_register(GUSB2I2CCTL(13)), + dump_register(GUSB2I2CCTL(14)), + dump_register(GUSB2I2CCTL(15)), + + dump_register(GUSB2PHYACC(0)), + dump_register(GUSB2PHYACC(1)), + dump_register(GUSB2PHYACC(2)), + dump_register(GUSB2PHYACC(3)), + dump_register(GUSB2PHYACC(4)), + dump_register(GUSB2PHYACC(5)), + dump_register(GUSB2PHYACC(6)), + dump_register(GUSB2PHYACC(7)), + dump_register(GUSB2PHYACC(8)), + dump_register(GUSB2PHYACC(9)), + dump_register(GUSB2PHYACC(10)), + dump_register(GUSB2PHYACC(11)), + dump_register(GUSB2PHYACC(12)), + dump_register(GUSB2PHYACC(13)), + dump_register(GUSB2PHYACC(14)), + dump_register(GUSB2PHYACC(15)), + + dump_register(GUSB3PIPECTL(0)), + dump_register(GUSB3PIPECTL(1)), + dump_register(GUSB3PIPECTL(2)), + dump_register(GUSB3PIPECTL(3)), + dump_register(GUSB3PIPECTL(4)), + dump_register(GUSB3PIPECTL(5)), + dump_register(GUSB3PIPECTL(6)), + dump_register(GUSB3PIPECTL(7)), + dump_register(GUSB3PIPECTL(8)), + dump_register(GUSB3PIPECTL(9)), + dump_register(GUSB3PIPECTL(10)), + dump_register(GUSB3PIPECTL(11)), + dump_register(GUSB3PIPECTL(12)), + dump_register(GUSB3PIPECTL(13)), + dump_register(GUSB3PIPECTL(14)), + dump_register(GUSB3PIPECTL(15)), + + dump_register(GTXFIFOSIZ(0)), + dump_register(GTXFIFOSIZ(1)), + dump_register(GTXFIFOSIZ(2)), + dump_register(GTXFIFOSIZ(3)), + dump_register(GTXFIFOSIZ(4)), + dump_register(GTXFIFOSIZ(5)), + dump_register(GTXFIFOSIZ(6)), + dump_register(GTXFIFOSIZ(7)), + dump_register(GTXFIFOSIZ(8)), + dump_register(GTXFIFOSIZ(9)), + dump_register(GTXFIFOSIZ(10)), + dump_register(GTXFIFOSIZ(11)), + dump_register(GTXFIFOSIZ(12)), + dump_register(GTXFIFOSIZ(13)), + dump_register(GTXFIFOSIZ(14)), + dump_register(GTXFIFOSIZ(15)), + dump_register(GTXFIFOSIZ(16)), + dump_register(GTXFIFOSIZ(17)), + dump_register(GTXFIFOSIZ(18)), + dump_register(GTXFIFOSIZ(19)), + dump_register(GTXFIFOSIZ(20)), + dump_register(GTXFIFOSIZ(21)), + dump_register(GTXFIFOSIZ(22)), + dump_register(GTXFIFOSIZ(23)), + dump_register(GTXFIFOSIZ(24)), + dump_register(GTXFIFOSIZ(25)), + dump_register(GTXFIFOSIZ(26)), + dump_register(GTXFIFOSIZ(27)), + dump_register(GTXFIFOSIZ(28)), + dump_register(GTXFIFOSIZ(29)), + dump_register(GTXFIFOSIZ(30)), + dump_register(GTXFIFOSIZ(31)), + + dump_register(GRXFIFOSIZ(0)), + dump_register(GRXFIFOSIZ(1)), + dump_register(GRXFIFOSIZ(2)), + dump_register(GRXFIFOSIZ(3)), + dump_register(GRXFIFOSIZ(4)), + dump_register(GRXFIFOSIZ(5)), + dump_register(GRXFIFOSIZ(6)), + dump_register(GRXFIFOSIZ(7)), + dump_register(GRXFIFOSIZ(8)), + dump_register(GRXFIFOSIZ(9)), + dump_register(GRXFIFOSIZ(10)), + dump_register(GRXFIFOSIZ(11)), + dump_register(GRXFIFOSIZ(12)), + dump_register(GRXFIFOSIZ(13)), + dump_register(GRXFIFOSIZ(14)), + dump_register(GRXFIFOSIZ(15)), + dump_register(GRXFIFOSIZ(16)), + dump_register(GRXFIFOSIZ(17)), + dump_register(GRXFIFOSIZ(18)), + dump_register(GRXFIFOSIZ(19)), + dump_register(GRXFIFOSIZ(20)), + dump_register(GRXFIFOSIZ(21)), + dump_register(GRXFIFOSIZ(22)), + dump_register(GRXFIFOSIZ(23)), + dump_register(GRXFIFOSIZ(24)), + dump_register(GRXFIFOSIZ(25)), + dump_register(GRXFIFOSIZ(26)), + dump_register(GRXFIFOSIZ(27)), + dump_register(GRXFIFOSIZ(28)), + dump_register(GRXFIFOSIZ(29)), + dump_register(GRXFIFOSIZ(30)), + dump_register(GRXFIFOSIZ(31)), + + dump_register(GEVNTADRLO(0)), + dump_register(GEVNTADRHI(0)), + dump_register(GEVNTSIZ(0)), + dump_register(GEVNTCOUNT(0)), + + dump_register(GHWPARAMS8), + dump_register(DCFG), + dump_register(DCTL), + dump_register(DEVTEN), + dump_register(DSTS), + dump_register(DGCMDPAR), + dump_register(DGCMD), + dump_register(DALEPENA), + + dump_register(DEPCMDPAR2(0)), + dump_register(DEPCMDPAR2(1)), + dump_register(DEPCMDPAR2(2)), + dump_register(DEPCMDPAR2(3)), + dump_register(DEPCMDPAR2(4)), + dump_register(DEPCMDPAR2(5)), + dump_register(DEPCMDPAR2(6)), + dump_register(DEPCMDPAR2(7)), + dump_register(DEPCMDPAR2(8)), + dump_register(DEPCMDPAR2(9)), + dump_register(DEPCMDPAR2(10)), + dump_register(DEPCMDPAR2(11)), + dump_register(DEPCMDPAR2(12)), + dump_register(DEPCMDPAR2(13)), + dump_register(DEPCMDPAR2(14)), + dump_register(DEPCMDPAR2(15)), + dump_register(DEPCMDPAR2(16)), + dump_register(DEPCMDPAR2(17)), + dump_register(DEPCMDPAR2(18)), + dump_register(DEPCMDPAR2(19)), + dump_register(DEPCMDPAR2(20)), + dump_register(DEPCMDPAR2(21)), + dump_register(DEPCMDPAR2(22)), + dump_register(DEPCMDPAR2(23)), + dump_register(DEPCMDPAR2(24)), + dump_register(DEPCMDPAR2(25)), + dump_register(DEPCMDPAR2(26)), + dump_register(DEPCMDPAR2(27)), + dump_register(DEPCMDPAR2(28)), + dump_register(DEPCMDPAR2(29)), + dump_register(DEPCMDPAR2(30)), + dump_register(DEPCMDPAR2(31)), + + dump_register(DEPCMDPAR1(0)), + dump_register(DEPCMDPAR1(1)), + dump_register(DEPCMDPAR1(2)), + dump_register(DEPCMDPAR1(3)), + dump_register(DEPCMDPAR1(4)), + dump_register(DEPCMDPAR1(5)), + dump_register(DEPCMDPAR1(6)), + dump_register(DEPCMDPAR1(7)), + dump_register(DEPCMDPAR1(8)), + dump_register(DEPCMDPAR1(9)), + dump_register(DEPCMDPAR1(10)), + dump_register(DEPCMDPAR1(11)), + dump_register(DEPCMDPAR1(12)), + dump_register(DEPCMDPAR1(13)), + dump_register(DEPCMDPAR1(14)), + dump_register(DEPCMDPAR1(15)), + dump_register(DEPCMDPAR1(16)), + dump_register(DEPCMDPAR1(17)), + dump_register(DEPCMDPAR1(18)), + dump_register(DEPCMDPAR1(19)), + dump_register(DEPCMDPAR1(20)), + dump_register(DEPCMDPAR1(21)), + dump_register(DEPCMDPAR1(22)), + dump_register(DEPCMDPAR1(23)), + dump_register(DEPCMDPAR1(24)), + dump_register(DEPCMDPAR1(25)), + dump_register(DEPCMDPAR1(26)), + dump_register(DEPCMDPAR1(27)), + dump_register(DEPCMDPAR1(28)), + dump_register(DEPCMDPAR1(29)), + dump_register(DEPCMDPAR1(30)), + dump_register(DEPCMDPAR1(31)), + + dump_register(DEPCMDPAR0(0)), + dump_register(DEPCMDPAR0(1)), + dump_register(DEPCMDPAR0(2)), + dump_register(DEPCMDPAR0(3)), + dump_register(DEPCMDPAR0(4)), + dump_register(DEPCMDPAR0(5)), + dump_register(DEPCMDPAR0(6)), + dump_register(DEPCMDPAR0(7)), + dump_register(DEPCMDPAR0(8)), + dump_register(DEPCMDPAR0(9)), + dump_register(DEPCMDPAR0(10)), + dump_register(DEPCMDPAR0(11)), + dump_register(DEPCMDPAR0(12)), + dump_register(DEPCMDPAR0(13)), + dump_register(DEPCMDPAR0(14)), + dump_register(DEPCMDPAR0(15)), + dump_register(DEPCMDPAR0(16)), + dump_register(DEPCMDPAR0(17)), + dump_register(DEPCMDPAR0(18)), + dump_register(DEPCMDPAR0(19)), + dump_register(DEPCMDPAR0(20)), + dump_register(DEPCMDPAR0(21)), + dump_register(DEPCMDPAR0(22)), + dump_register(DEPCMDPAR0(23)), + dump_register(DEPCMDPAR0(24)), + dump_register(DEPCMDPAR0(25)), + dump_register(DEPCMDPAR0(26)), + dump_register(DEPCMDPAR0(27)), + dump_register(DEPCMDPAR0(28)), + dump_register(DEPCMDPAR0(29)), + dump_register(DEPCMDPAR0(30)), + dump_register(DEPCMDPAR0(31)), + + dump_register(DEPCMD(0)), + dump_register(DEPCMD(1)), + dump_register(DEPCMD(2)), + dump_register(DEPCMD(3)), + dump_register(DEPCMD(4)), + dump_register(DEPCMD(5)), + dump_register(DEPCMD(6)), + dump_register(DEPCMD(7)), + dump_register(DEPCMD(8)), + dump_register(DEPCMD(9)), + dump_register(DEPCMD(10)), + dump_register(DEPCMD(11)), + dump_register(DEPCMD(12)), + dump_register(DEPCMD(13)), + dump_register(DEPCMD(14)), + dump_register(DEPCMD(15)), + dump_register(DEPCMD(16)), + dump_register(DEPCMD(17)), + dump_register(DEPCMD(18)), + dump_register(DEPCMD(19)), + dump_register(DEPCMD(20)), + dump_register(DEPCMD(21)), + dump_register(DEPCMD(22)), + dump_register(DEPCMD(23)), + dump_register(DEPCMD(24)), + dump_register(DEPCMD(25)), + dump_register(DEPCMD(26)), + dump_register(DEPCMD(27)), + dump_register(DEPCMD(28)), + dump_register(DEPCMD(29)), + dump_register(DEPCMD(30)), + dump_register(DEPCMD(31)), + + dump_register(OCFG), + dump_register(OCTL), + dump_register(OEVTEN), + dump_register(OSTS), +}; + +static int dwc3_regdump_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + + seq_printf(s, "DesignWare USB3 Core Register Dump\n"); + debugfs_print_regs32(s, dwc3_regs, ARRAY_SIZE(dwc3_regs), + dwc->regs, ""); + return 0; +} + +static int dwc3_regdump_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_regdump_show, inode->i_private); +} + +static const struct file_operations dwc3_regdump_fops = { + .open = dwc3_regdump_open, + .read = seq_read, + .release = single_release, +}; + +static int dwc3_mode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (DWC3_GCTL_PRTCAP(reg)) { + case DWC3_GCTL_PRTCAP_HOST: + seq_printf(s, "host\n"); + break; + case DWC3_GCTL_PRTCAP_DEVICE: + seq_printf(s, "device\n"); + break; + case DWC3_GCTL_PRTCAP_OTG: + seq_printf(s, "OTG\n"); + break; + default: + seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg)); + } + + return 0; +} + +static int dwc3_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_mode_show, inode->i_private); +} + +static ssize_t dwc3_mode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 mode = 0; + char buf[32]; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "host", 4)) + mode |= DWC3_GCTL_PRTCAP_HOST; + + if (!strncmp(buf, "device", 6)) + mode |= DWC3_GCTL_PRTCAP_DEVICE; + + if (!strncmp(buf, "otg", 3)) + mode |= DWC3_GCTL_PRTCAP_OTG; + + if (mode) { + spin_lock_irqsave(&dwc->lock, flags); + dwc3_set_mode(dwc, mode); + spin_unlock_irqrestore(&dwc->lock, flags); + } + return count; +} + +static const struct file_operations dwc3_mode_fops = { + .open = dwc3_mode_open, + .write = dwc3_mode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_testmode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= DWC3_DCTL_TSTCTRL_MASK; + reg >>= 1; + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (reg) { + case 0: + seq_printf(s, "no test\n"); + break; + case TEST_J: + seq_printf(s, "test_j\n"); + break; + case TEST_K: + seq_printf(s, "test_k\n"); + break; + case TEST_SE0_NAK: + seq_printf(s, "test_se0_nak\n"); + break; + case TEST_PACKET: + seq_printf(s, "test_packet\n"); + break; + case TEST_FORCE_EN: + seq_printf(s, "test_force_enable\n"); + break; + default: + seq_printf(s, "UNKNOWN %d\n", reg); + } + + return 0; +} + +static int dwc3_testmode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_testmode_show, inode->i_private); +} + +static ssize_t dwc3_testmode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 testmode = 0; + char buf[32]; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "test_j", 6)) + testmode = TEST_J; + else if (!strncmp(buf, "test_k", 6)) + testmode = TEST_K; + else if (!strncmp(buf, "test_se0_nak", 12)) + testmode = TEST_SE0_NAK; + else if (!strncmp(buf, "test_packet", 11)) + testmode = TEST_PACKET; + else if (!strncmp(buf, "test_force_enable", 17)) + testmode = TEST_FORCE_EN; + else + testmode = 0; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_set_test_mode(dwc, testmode); + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static const struct file_operations dwc3_testmode_fops = { + .open = dwc3_testmode_open, + .write = dwc3_testmode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_link_state_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state; + u32 reg; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + state = DWC3_DSTS_USBLNKST(reg); + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (state) { + case DWC3_LINK_STATE_U0: + seq_printf(s, "U0\n"); + break; + case DWC3_LINK_STATE_U1: + seq_printf(s, "U1\n"); + break; + case DWC3_LINK_STATE_U2: + seq_printf(s, "U2\n"); + break; + case DWC3_LINK_STATE_U3: + seq_printf(s, "U3\n"); + break; + case DWC3_LINK_STATE_SS_DIS: + seq_printf(s, "SS.Disabled\n"); + break; + case DWC3_LINK_STATE_RX_DET: + seq_printf(s, "Rx.Detect\n"); + break; + case DWC3_LINK_STATE_SS_INACT: + seq_printf(s, "SS.Inactive\n"); + break; + case DWC3_LINK_STATE_POLL: + seq_printf(s, "Poll\n"); + break; + case DWC3_LINK_STATE_RECOV: + seq_printf(s, "Recovery\n"); + break; + case DWC3_LINK_STATE_HRESET: + seq_printf(s, "HRESET\n"); + break; + case DWC3_LINK_STATE_CMPLY: + seq_printf(s, "Compliance\n"); + break; + case DWC3_LINK_STATE_LPBK: + seq_printf(s, "Loopback\n"); + break; + default: + seq_printf(s, "UNKNOWN %d\n", reg); + } + + return 0; +} + +static int dwc3_link_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_link_state_show, inode->i_private); +} + +static ssize_t dwc3_link_state_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state = 0; + char buf[32]; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "SS.Disabled", 11)) + state = DWC3_LINK_STATE_SS_DIS; + else if (!strncmp(buf, "Rx.Detect", 9)) + state = DWC3_LINK_STATE_RX_DET; + else if (!strncmp(buf, "SS.Inactive", 11)) + state = DWC3_LINK_STATE_SS_INACT; + else if (!strncmp(buf, "Recovery", 8)) + state = DWC3_LINK_STATE_RECOV; + else if (!strncmp(buf, "Compliance", 10)) + state = DWC3_LINK_STATE_CMPLY; + else if (!strncmp(buf, "Loopback", 8)) + state = DWC3_LINK_STATE_LPBK; + else + return -EINVAL; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_set_link_state(dwc, state); + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static const struct file_operations dwc3_link_state_fops = { + .open = dwc3_link_state_open, + .write = dwc3_link_state_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +int __devinit dwc3_debugfs_init(struct dwc3 *dwc) +{ + struct dentry *root; + struct dentry *file; + int ret; + + root = debugfs_create_dir(dev_name(dwc->dev), NULL); + if (!root) { + ret = -ENOMEM; + goto err0; + } + + dwc->root = root; + + file = debugfs_create_file("regdump", S_IRUGO, root, dwc, + &dwc3_regdump_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_mode_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_testmode_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_link_state_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + return 0; + +err1: + debugfs_remove_recursive(root); + +err0: + return ret; +} + +void __devexit dwc3_debugfs_exit(struct dwc3 *dwc) +{ + debugfs_remove_recursive(dwc->root); + dwc->root = NULL; +} diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c new file mode 100644 index 00000000..d1903019 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -0,0 +1,151 @@ +/** + * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Anton Tikhomirov <av.tikhomirov@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/platform_data/dwc3-exynos.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/clk.h> + +#include "core.h" + +struct dwc3_exynos { + struct platform_device *dwc3; + struct device *dev; + + struct clk *clk; +}; + +static int __devinit dwc3_exynos_probe(struct platform_device *pdev) +{ + struct dwc3_exynos_data *pdata = pdev->dev.platform_data; + struct platform_device *dwc3; + struct dwc3_exynos *exynos; + struct clk *clk; + + int devid; + int ret = -ENOMEM; + + exynos = kzalloc(sizeof(*exynos), GFP_KERNEL); + if (!exynos) { + dev_err(&pdev->dev, "not enough memory\n"); + goto err0; + } + + platform_set_drvdata(pdev, exynos); + + devid = dwc3_get_device_id(); + if (devid < 0) + goto err1; + + dwc3 = platform_device_alloc("dwc3", devid); + if (!dwc3) { + dev_err(&pdev->dev, "couldn't allocate dwc3 device\n"); + goto err2; + } + + clk = clk_get(&pdev->dev, "usbdrd30"); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "couldn't get clock\n"); + ret = -EINVAL; + goto err3; + } + + dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask); + + dwc3->dev.parent = &pdev->dev; + dwc3->dev.dma_mask = pdev->dev.dma_mask; + dwc3->dev.dma_parms = pdev->dev.dma_parms; + exynos->dwc3 = dwc3; + exynos->dev = &pdev->dev; + exynos->clk = clk; + + clk_enable(exynos->clk); + + /* PHY initialization */ + if (!pdata) { + dev_dbg(&pdev->dev, "missing platform data\n"); + } else { + if (pdata->phy_init) + pdata->phy_init(pdev, pdata->phy_type); + } + + ret = platform_device_add_resources(dwc3, pdev->resource, + pdev->num_resources); + if (ret) { + dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n"); + goto err4; + } + + ret = platform_device_add(dwc3); + if (ret) { + dev_err(&pdev->dev, "failed to register dwc3 device\n"); + goto err4; + } + + return 0; + +err4: + if (pdata && pdata->phy_exit) + pdata->phy_exit(pdev, pdata->phy_type); + + clk_disable(clk); + clk_put(clk); +err3: + platform_device_put(dwc3); +err2: + dwc3_put_device_id(devid); +err1: + kfree(exynos); +err0: + return ret; +} + +static int __devexit dwc3_exynos_remove(struct platform_device *pdev) +{ + struct dwc3_exynos *exynos = platform_get_drvdata(pdev); + struct dwc3_exynos_data *pdata = pdev->dev.platform_data; + + platform_device_unregister(exynos->dwc3); + + dwc3_put_device_id(exynos->dwc3->id); + + if (pdata && pdata->phy_exit) + pdata->phy_exit(pdev, pdata->phy_type); + + clk_disable(exynos->clk); + clk_put(exynos->clk); + + kfree(exynos); + + return 0; +} + +static struct platform_driver dwc3_exynos_driver = { + .probe = dwc3_exynos_probe, + .remove = __devexit_p(dwc3_exynos_remove), + .driver = { + .name = "exynos-dwc3", + }, +}; + +module_platform_driver(dwc3_exynos_driver); + +MODULE_ALIAS("platform:exynos-dwc3"); +MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer"); diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c new file mode 100644 index 00000000..d7d9c0ec --- /dev/null +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -0,0 +1,392 @@ +/** + * dwc3-omap.c - OMAP Specific Glue layer + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/platform_data/dwc3-omap.h> +#include <linux/dma-mapping.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/of.h> + +#include "core.h" +#include "io.h" + +/* + * All these registers belong to OMAP's Wrapper around the + * DesignWare USB3 Core. + */ + +#define USBOTGSS_REVISION 0x0000 +#define USBOTGSS_SYSCONFIG 0x0010 +#define USBOTGSS_IRQ_EOI 0x0020 +#define USBOTGSS_IRQSTATUS_RAW_0 0x0024 +#define USBOTGSS_IRQSTATUS_0 0x0028 +#define USBOTGSS_IRQENABLE_SET_0 0x002c +#define USBOTGSS_IRQENABLE_CLR_0 0x0030 +#define USBOTGSS_IRQSTATUS_RAW_1 0x0034 +#define USBOTGSS_IRQSTATUS_1 0x0038 +#define USBOTGSS_IRQENABLE_SET_1 0x003c +#define USBOTGSS_IRQENABLE_CLR_1 0x0040 +#define USBOTGSS_UTMI_OTG_CTRL 0x0080 +#define USBOTGSS_UTMI_OTG_STATUS 0x0084 +#define USBOTGSS_MMRAM_OFFSET 0x0100 +#define USBOTGSS_FLADJ 0x0104 +#define USBOTGSS_DEBUG_CFG 0x0108 +#define USBOTGSS_DEBUG_DATA 0x010c + +/* SYSCONFIG REGISTER */ +#define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16) +#define USBOTGSS_SYSCONFIG_STANDBYMODE(x) ((x) << 4) + +#define USBOTGSS_STANDBYMODE_FORCE_STANDBY 0 +#define USBOTGSS_STANDBYMODE_NO_STANDBY 1 +#define USBOTGSS_STANDBYMODE_SMART_STANDBY 2 +#define USBOTGSS_STANDBYMODE_SMART_WAKEUP 3 + +#define USBOTGSS_STANDBYMODE_MASK (0x03 << 4) + +#define USBOTGSS_SYSCONFIG_IDLEMODE(x) ((x) << 2) + +#define USBOTGSS_IDLEMODE_FORCE_IDLE 0 +#define USBOTGSS_IDLEMODE_NO_IDLE 1 +#define USBOTGSS_IDLEMODE_SMART_IDLE 2 +#define USBOTGSS_IDLEMODE_SMART_WAKEUP 3 + +#define USBOTGSS_IDLEMODE_MASK (0x03 << 2) + +/* IRQ_EOI REGISTER */ +#define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0) + +/* IRQS0 BITS */ +#define USBOTGSS_IRQO_COREIRQ_ST (1 << 0) + +/* IRQ1 BITS */ +#define USBOTGSS_IRQ1_DMADISABLECLR (1 << 17) +#define USBOTGSS_IRQ1_OEVT (1 << 16) +#define USBOTGSS_IRQ1_DRVVBUS_RISE (1 << 13) +#define USBOTGSS_IRQ1_CHRGVBUS_RISE (1 << 12) +#define USBOTGSS_IRQ1_DISCHRGVBUS_RISE (1 << 11) +#define USBOTGSS_IRQ1_IDPULLUP_RISE (1 << 8) +#define USBOTGSS_IRQ1_DRVVBUS_FALL (1 << 5) +#define USBOTGSS_IRQ1_CHRGVBUS_FALL (1 << 4) +#define USBOTGSS_IRQ1_DISCHRGVBUS_FALL (1 << 3) +#define USBOTGSS_IRQ1_IDPULLUP_FALL (1 << 0) + +/* UTMI_OTG_CTRL REGISTER */ +#define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS (1 << 5) +#define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS (1 << 4) +#define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS (1 << 3) +#define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP (1 << 0) + +/* UTMI_OTG_STATUS REGISTER */ +#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE (1 << 31) +#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT (1 << 9) +#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8) +#define USBOTGSS_UTMI_OTG_STATUS_IDDIG (1 << 4) +#define USBOTGSS_UTMI_OTG_STATUS_SESSEND (1 << 3) +#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID (1 << 2) +#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1) + +struct dwc3_omap { + /* device lock */ + spinlock_t lock; + + struct platform_device *dwc3; + struct device *dev; + + int irq; + void __iomem *base; + + void *context; + u32 resource_size; + + u32 dma_status:1; +}; + +static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap) +{ + struct dwc3_omap *omap = _omap; + u32 reg; + + spin_lock(&omap->lock); + + reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_1); + + if (reg & USBOTGSS_IRQ1_DMADISABLECLR) { + dev_dbg(omap->dev, "DMA Disable was Cleared\n"); + omap->dma_status = false; + } + + if (reg & USBOTGSS_IRQ1_OEVT) + dev_dbg(omap->dev, "OTG Event\n"); + + if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE) + dev_dbg(omap->dev, "DRVVBUS Rise\n"); + + if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE) + dev_dbg(omap->dev, "CHRGVBUS Rise\n"); + + if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE) + dev_dbg(omap->dev, "DISCHRGVBUS Rise\n"); + + if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE) + dev_dbg(omap->dev, "IDPULLUP Rise\n"); + + if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL) + dev_dbg(omap->dev, "DRVVBUS Fall\n"); + + if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL) + dev_dbg(omap->dev, "CHRGVBUS Fall\n"); + + if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL) + dev_dbg(omap->dev, "DISCHRGVBUS Fall\n"); + + if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL) + dev_dbg(omap->dev, "IDPULLUP Fall\n"); + + dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_1, reg); + + reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_0); + dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_0, reg); + + spin_unlock(&omap->lock); + + return IRQ_HANDLED; +} + +static int __devinit dwc3_omap_probe(struct platform_device *pdev) +{ + struct dwc3_omap_data *pdata = pdev->dev.platform_data; + struct device_node *node = pdev->dev.of_node; + + struct platform_device *dwc3; + struct dwc3_omap *omap; + struct resource *res; + struct device *dev = &pdev->dev; + + int devid; + int size; + int ret = -ENOMEM; + int irq; + + const u32 *utmi_mode; + u32 reg; + + void __iomem *base; + void *context; + + omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); + if (!omap) { + dev_err(dev, "not enough memory\n"); + return -ENOMEM; + } + + platform_set_drvdata(pdev, omap); + + irq = platform_get_irq(pdev, 1); + if (irq < 0) { + dev_err(dev, "missing IRQ resource\n"); + return -EINVAL; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + dev_err(dev, "missing memory base resource\n"); + return -EINVAL; + } + + base = devm_ioremap_nocache(dev, res->start, resource_size(res)); + if (!base) { + dev_err(dev, "ioremap failed\n"); + return -ENOMEM; + } + + devid = dwc3_get_device_id(); + if (devid < 0) + return -ENODEV; + + dwc3 = platform_device_alloc("dwc3", devid); + if (!dwc3) { + dev_err(dev, "couldn't allocate dwc3 device\n"); + goto err1; + } + + context = devm_kzalloc(dev, resource_size(res), GFP_KERNEL); + if (!context) { + dev_err(dev, "couldn't allocate dwc3 context memory\n"); + goto err2; + } + + spin_lock_init(&omap->lock); + dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask); + + dwc3->dev.parent = dev; + dwc3->dev.dma_mask = dev->dma_mask; + dwc3->dev.dma_parms = dev->dma_parms; + omap->resource_size = resource_size(res); + omap->context = context; + omap->dev = dev; + omap->irq = irq; + omap->base = base; + omap->dwc3 = dwc3; + + reg = dwc3_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); + + utmi_mode = of_get_property(node, "utmi-mode", &size); + if (utmi_mode && size == sizeof(*utmi_mode)) { + reg |= *utmi_mode; + } else { + if (!pdata) { + dev_dbg(dev, "missing platform data\n"); + } else { + switch (pdata->utmi_mode) { + case DWC3_OMAP_UTMI_MODE_SW: + reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE; + break; + case DWC3_OMAP_UTMI_MODE_HW: + reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE; + break; + default: + dev_dbg(dev, "UNKNOWN utmi mode %d\n", + pdata->utmi_mode); + } + } + } + + dwc3_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg); + + /* check the DMA Status */ + reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG); + omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE); + + /* Set No-Idle and No-Standby */ + reg &= ~(USBOTGSS_STANDBYMODE_MASK + | USBOTGSS_IDLEMODE_MASK); + + reg |= (USBOTGSS_SYSCONFIG_STANDBYMODE(USBOTGSS_STANDBYMODE_NO_STANDBY) + | USBOTGSS_SYSCONFIG_IDLEMODE(USBOTGSS_IDLEMODE_NO_IDLE)); + + dwc3_writel(omap->base, USBOTGSS_SYSCONFIG, reg); + + ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0, + "dwc3-omap", omap); + if (ret) { + dev_err(dev, "failed to request IRQ #%d --> %d\n", + omap->irq, ret); + goto err2; + } + + /* enable all IRQs */ + reg = USBOTGSS_IRQO_COREIRQ_ST; + dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, reg); + + reg = (USBOTGSS_IRQ1_OEVT | + USBOTGSS_IRQ1_DRVVBUS_RISE | + USBOTGSS_IRQ1_CHRGVBUS_RISE | + USBOTGSS_IRQ1_DISCHRGVBUS_RISE | + USBOTGSS_IRQ1_IDPULLUP_RISE | + USBOTGSS_IRQ1_DRVVBUS_FALL | + USBOTGSS_IRQ1_CHRGVBUS_FALL | + USBOTGSS_IRQ1_DISCHRGVBUS_FALL | + USBOTGSS_IRQ1_IDPULLUP_FALL); + + dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg); + + ret = platform_device_add_resources(dwc3, pdev->resource, + pdev->num_resources); + if (ret) { + dev_err(dev, "couldn't add resources to dwc3 device\n"); + goto err2; + } + + ret = platform_device_add(dwc3); + if (ret) { + dev_err(dev, "failed to register dwc3 device\n"); + goto err2; + } + + return 0; + +err2: + platform_device_put(dwc3); + +err1: + dwc3_put_device_id(devid); + + return ret; +} + +static int __devexit dwc3_omap_remove(struct platform_device *pdev) +{ + struct dwc3_omap *omap = platform_get_drvdata(pdev); + + platform_device_unregister(omap->dwc3); + + dwc3_put_device_id(omap->dwc3->id); + + return 0; +} + +static const struct of_device_id of_dwc3_matach[] = { + { + "ti,dwc3", + }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_dwc3_matach); + +static struct platform_driver dwc3_omap_driver = { + .probe = dwc3_omap_probe, + .remove = __devexit_p(dwc3_omap_remove), + .driver = { + .name = "omap-dwc3", + .of_match_table = of_dwc3_matach, + }, +}; + +module_platform_driver(dwc3_omap_driver); + +MODULE_ALIAS("platform:omap-dwc3"); +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer"); diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c new file mode 100644 index 00000000..a9ca9adb --- /dev/null +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -0,0 +1,173 @@ +/** + * dwc3-pci.c - PCI Specific glue layer + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/pci.h> +#include <linux/platform_device.h> + +#include "core.h" + +/* FIXME define these in <linux/pci_ids.h> */ +#define PCI_VENDOR_ID_SYNOPSYS 0x16c3 +#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd + +struct dwc3_pci { + struct device *dev; + struct platform_device *dwc3; +}; + +static int __devinit dwc3_pci_probe(struct pci_dev *pci, + const struct pci_device_id *id) +{ + struct resource res[2]; + struct platform_device *dwc3; + struct dwc3_pci *glue; + int ret = -ENOMEM; + int devid; + struct device *dev = &pci->dev; + + glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); + if (!glue) { + dev_err(dev, "not enough memory\n"); + return -ENOMEM; + } + + glue->dev = dev; + + ret = pci_enable_device(pci); + if (ret) { + dev_err(dev, "failed to enable pci device\n"); + return -ENODEV; + } + + pci_set_power_state(pci, PCI_D0); + pci_set_master(pci); + + devid = dwc3_get_device_id(); + if (devid < 0) { + ret = -ENOMEM; + goto err1; + } + + dwc3 = platform_device_alloc("dwc3", devid); + if (!dwc3) { + dev_err(dev, "couldn't allocate dwc3 device\n"); + ret = -ENOMEM; + goto err1; + } + + memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); + + res[0].start = pci_resource_start(pci, 0); + res[0].end = pci_resource_end(pci, 0); + res[0].name = "dwc_usb3"; + res[0].flags = IORESOURCE_MEM; + + res[1].start = pci->irq; + res[1].name = "dwc_usb3"; + res[1].flags = IORESOURCE_IRQ; + + ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); + if (ret) { + dev_err(dev, "couldn't add resources to dwc3 device\n"); + goto err2; + } + + pci_set_drvdata(pci, glue); + + dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask); + + dwc3->dev.dma_mask = dev->dma_mask; + dwc3->dev.dma_parms = dev->dma_parms; + dwc3->dev.parent = dev; + glue->dwc3 = dwc3; + + ret = platform_device_add(dwc3); + if (ret) { + dev_err(dev, "failed to register dwc3 device\n"); + goto err3; + } + + return 0; + +err3: + pci_set_drvdata(pci, NULL); + platform_device_put(dwc3); + +err2: + dwc3_put_device_id(devid); + +err1: + pci_disable_device(pci); + + return ret; +} + +static void __devexit dwc3_pci_remove(struct pci_dev *pci) +{ + struct dwc3_pci *glue = pci_get_drvdata(pci); + + dwc3_put_device_id(glue->dwc3->id); + platform_device_unregister(glue->dwc3); + pci_set_drvdata(pci, NULL); + pci_disable_device(pci); +} + +static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = { + { + PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, + PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), + }, + { } /* Terminating Entry */ +}; +MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); + +static struct pci_driver dwc3_pci_driver = { + .name = "dwc3-pci", + .id_table = dwc3_pci_id_table, + .probe = dwc3_pci_probe, + .remove = __devexit_p(dwc3_pci_remove), +}; + +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); + +module_pci_driver(dwc3_pci_driver); diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c new file mode 100644 index 00000000..3584a169 --- /dev/null +++ b/drivers/usb/dwc3/ep0.c @@ -0,0 +1,873 @@ +/** + * ep0.c - DesignWare USB3 DRD Controller Endpoint 0 Handling + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/list.h> +#include <linux/dma-mapping.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/composite.h> + +#include "core.h" +#include "gadget.h" +#include "io.h" + +static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum); + +static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state) +{ + switch (state) { + case EP0_UNCONNECTED: + return "Unconnected"; + case EP0_SETUP_PHASE: + return "Setup Phase"; + case EP0_DATA_PHASE: + return "Data Phase"; + case EP0_STATUS_PHASE: + return "Status Phase"; + default: + return "UNKNOWN"; + } +} + +static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, + u32 len, u32 type) +{ + struct dwc3_gadget_ep_cmd_params params; + struct dwc3_trb *trb; + struct dwc3_ep *dep; + + int ret; + + dep = dwc->eps[epnum]; + if (dep->flags & DWC3_EP_BUSY) { + dev_vdbg(dwc->dev, "%s: still busy\n", dep->name); + return 0; + } + + trb = dwc->ep0_trb; + + trb->bpl = lower_32_bits(buf_dma); + trb->bph = upper_32_bits(buf_dma); + trb->size = len; + trb->ctrl = type; + + trb->ctrl |= (DWC3_TRB_CTRL_HWO + | DWC3_TRB_CTRL_LST + | DWC3_TRB_CTRL_IOC + | DWC3_TRB_CTRL_ISP_IMI); + + memset(¶ms, 0, sizeof(params)); + params.param0 = upper_32_bits(dwc->ep0_trb_addr); + params.param1 = lower_32_bits(dwc->ep0_trb_addr); + + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_STARTTRANSFER, ¶ms); + if (ret < 0) { + dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); + return ret; + } + + dep->flags |= DWC3_EP_BUSY; + dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, + dep->number); + + dwc->ep0_next_event = DWC3_EP0_COMPLETE; + + return 0; +} + +static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep, + struct dwc3_request *req) +{ + struct dwc3 *dwc = dep->dwc; + int ret = 0; + + req->request.actual = 0; + req->request.status = -EINPROGRESS; + req->epnum = dep->number; + + list_add_tail(&req->list, &dep->request_list); + + /* + * Gadget driver might not be quick enough to queue a request + * before we get a Transfer Not Ready event on this endpoint. + * + * In that case, we will set DWC3_EP_PENDING_REQUEST. When that + * flag is set, it's telling us that as soon as Gadget queues the + * required request, we should kick the transfer here because the + * IRQ we were waiting for is long gone. + */ + if (dep->flags & DWC3_EP_PENDING_REQUEST) { + unsigned direction; + + direction = !!(dep->flags & DWC3_EP0_DIR_IN); + + if (dwc->ep0state != EP0_DATA_PHASE) { + dev_WARN(dwc->dev, "Unexpected pending request\n"); + return 0; + } + + ret = dwc3_ep0_start_trans(dwc, direction, + req->request.dma, req->request.length, + DWC3_TRBCTL_CONTROL_DATA); + dep->flags &= ~(DWC3_EP_PENDING_REQUEST | + DWC3_EP0_DIR_IN); + } else if (dwc->delayed_status) { + dwc->delayed_status = false; + + if (dwc->ep0state == EP0_STATUS_PHASE) + dwc3_ep0_do_control_status(dwc, 1); + else + dev_dbg(dwc->dev, "too early for delayed status\n"); + } + + return ret; +} + +int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, + gfp_t gfp_flags) +{ + struct dwc3_request *req = to_dwc3_request(request); + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + + unsigned long flags; + + int ret; + + spin_lock_irqsave(&dwc->lock, flags); + if (!dep->desc) { + dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", + request, dep->name); + ret = -ESHUTDOWN; + goto out; + } + + /* we share one TRB for ep0/1 */ + if (!list_empty(&dep->request_list)) { + ret = -EBUSY; + goto out; + } + + dev_vdbg(dwc->dev, "queueing request %p to %s length %d, state '%s'\n", + request, dep->name, request->length, + dwc3_ep0_state_string(dwc->ep0state)); + + ret = __dwc3_gadget_ep0_queue(dep, req); + +out: + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc) +{ + struct dwc3_ep *dep = dwc->eps[0]; + + /* stall is always issued on EP0 */ + __dwc3_gadget_ep_set_halt(dep, 1); + dep->flags = DWC3_EP_ENABLED; + dwc->delayed_status = false; + + if (!list_empty(&dep->request_list)) { + struct dwc3_request *req; + + req = next_request(&dep->request_list); + dwc3_gadget_giveback(dep, req, -ECONNRESET); + } + + dwc->ep0state = EP0_SETUP_PHASE; + dwc3_ep0_out_start(dwc); +} + +void dwc3_ep0_out_start(struct dwc3 *dwc) +{ + int ret; + + ret = dwc3_ep0_start_trans(dwc, 0, dwc->ctrl_req_addr, 8, + DWC3_TRBCTL_CONTROL_SETUP); + WARN_ON(ret < 0); +} + +static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le) +{ + struct dwc3_ep *dep; + u32 windex = le16_to_cpu(wIndex_le); + u32 epnum; + + epnum = (windex & USB_ENDPOINT_NUMBER_MASK) << 1; + if ((windex & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) + epnum |= 1; + + dep = dwc->eps[epnum]; + if (dep->flags & DWC3_EP_ENABLED) + return dep; + + return NULL; +} + +static void dwc3_ep0_status_cmpl(struct usb_ep *ep, struct usb_request *req) +{ +} +/* + * ch 9.4.5 + */ +static int dwc3_ep0_handle_status(struct dwc3 *dwc, + struct usb_ctrlrequest *ctrl) +{ + struct dwc3_ep *dep; + u32 recip; + u16 usb_status = 0; + __le16 *response_pkt; + + recip = ctrl->bRequestType & USB_RECIP_MASK; + switch (recip) { + case USB_RECIP_DEVICE: + /* + * We are self-powered. U1/U2/LTM will be set later + * once we handle this states. RemoteWakeup is 0 on SS + */ + usb_status |= dwc->is_selfpowered << USB_DEVICE_SELF_POWERED; + break; + + case USB_RECIP_INTERFACE: + /* + * Function Remote Wake Capable D0 + * Function Remote Wakeup D1 + */ + break; + + case USB_RECIP_ENDPOINT: + dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex); + if (!dep) + return -EINVAL; + + if (dep->flags & DWC3_EP_STALL) + usb_status = 1 << USB_ENDPOINT_HALT; + break; + default: + return -EINVAL; + }; + + response_pkt = (__le16 *) dwc->setup_buf; + *response_pkt = cpu_to_le16(usb_status); + + dep = dwc->eps[0]; + dwc->ep0_usb_req.dep = dep; + dwc->ep0_usb_req.request.length = sizeof(*response_pkt); + dwc->ep0_usb_req.request.buf = dwc->setup_buf; + dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl; + + return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req); +} + +static int dwc3_ep0_handle_feature(struct dwc3 *dwc, + struct usb_ctrlrequest *ctrl, int set) +{ + struct dwc3_ep *dep; + u32 recip; + u32 wValue; + u32 wIndex; + int ret; + + wValue = le16_to_cpu(ctrl->wValue); + wIndex = le16_to_cpu(ctrl->wIndex); + recip = ctrl->bRequestType & USB_RECIP_MASK; + switch (recip) { + case USB_RECIP_DEVICE: + + /* + * 9.4.1 says only only for SS, in AddressState only for + * default control pipe + */ + switch (wValue) { + case USB_DEVICE_U1_ENABLE: + case USB_DEVICE_U2_ENABLE: + case USB_DEVICE_LTM_ENABLE: + if (dwc->dev_state != DWC3_CONFIGURED_STATE) + return -EINVAL; + if (dwc->speed != DWC3_DSTS_SUPERSPEED) + return -EINVAL; + } + + /* XXX add U[12] & LTM */ + switch (wValue) { + case USB_DEVICE_REMOTE_WAKEUP: + break; + case USB_DEVICE_U1_ENABLE: + break; + case USB_DEVICE_U2_ENABLE: + break; + case USB_DEVICE_LTM_ENABLE: + break; + + case USB_DEVICE_TEST_MODE: + if ((wIndex & 0xff) != 0) + return -EINVAL; + if (!set) + return -EINVAL; + + dwc->test_mode_nr = wIndex >> 8; + dwc->test_mode = true; + break; + default: + return -EINVAL; + } + break; + + case USB_RECIP_INTERFACE: + switch (wValue) { + case USB_INTRF_FUNC_SUSPEND: + if (wIndex & USB_INTRF_FUNC_SUSPEND_LP) + /* XXX enable Low power suspend */ + ; + if (wIndex & USB_INTRF_FUNC_SUSPEND_RW) + /* XXX enable remote wakeup */ + ; + break; + default: + return -EINVAL; + } + break; + + case USB_RECIP_ENDPOINT: + switch (wValue) { + case USB_ENDPOINT_HALT: + dep = dwc3_wIndex_to_dep(dwc, wIndex); + if (!dep) + return -EINVAL; + ret = __dwc3_gadget_ep_set_halt(dep, set); + if (ret) + return -EINVAL; + break; + default: + return -EINVAL; + } + break; + + default: + return -EINVAL; + }; + + return 0; +} + +static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) +{ + u32 addr; + u32 reg; + + addr = le16_to_cpu(ctrl->wValue); + if (addr > 127) { + dev_dbg(dwc->dev, "invalid device address %d\n", addr); + return -EINVAL; + } + + if (dwc->dev_state == DWC3_CONFIGURED_STATE) { + dev_dbg(dwc->dev, "trying to set address when configured\n"); + return -EINVAL; + } + + reg = dwc3_readl(dwc->regs, DWC3_DCFG); + reg &= ~(DWC3_DCFG_DEVADDR_MASK); + reg |= DWC3_DCFG_DEVADDR(addr); + dwc3_writel(dwc->regs, DWC3_DCFG, reg); + + if (addr) + dwc->dev_state = DWC3_ADDRESS_STATE; + else + dwc->dev_state = DWC3_DEFAULT_STATE; + + return 0; +} + +static int dwc3_ep0_delegate_req(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) +{ + int ret; + + spin_unlock(&dwc->lock); + ret = dwc->gadget_driver->setup(&dwc->gadget, ctrl); + spin_lock(&dwc->lock); + return ret; +} + +static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) +{ + u32 cfg; + int ret; + + dwc->start_config_issued = false; + cfg = le16_to_cpu(ctrl->wValue); + + switch (dwc->dev_state) { + case DWC3_DEFAULT_STATE: + return -EINVAL; + break; + + case DWC3_ADDRESS_STATE: + ret = dwc3_ep0_delegate_req(dwc, ctrl); + /* if the cfg matches and the cfg is non zero */ + if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) { + dwc->dev_state = DWC3_CONFIGURED_STATE; + dwc->resize_fifos = true; + dev_dbg(dwc->dev, "resize fifos flag SET\n"); + } + break; + + case DWC3_CONFIGURED_STATE: + ret = dwc3_ep0_delegate_req(dwc, ctrl); + if (!cfg) + dwc->dev_state = DWC3_ADDRESS_STATE; + break; + default: + ret = -EINVAL; + } + return ret; +} + +static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) +{ + int ret; + + switch (ctrl->bRequest) { + case USB_REQ_GET_STATUS: + dev_vdbg(dwc->dev, "USB_REQ_GET_STATUS\n"); + ret = dwc3_ep0_handle_status(dwc, ctrl); + break; + case USB_REQ_CLEAR_FEATURE: + dev_vdbg(dwc->dev, "USB_REQ_CLEAR_FEATURE\n"); + ret = dwc3_ep0_handle_feature(dwc, ctrl, 0); + break; + case USB_REQ_SET_FEATURE: + dev_vdbg(dwc->dev, "USB_REQ_SET_FEATURE\n"); + ret = dwc3_ep0_handle_feature(dwc, ctrl, 1); + break; + case USB_REQ_SET_ADDRESS: + dev_vdbg(dwc->dev, "USB_REQ_SET_ADDRESS\n"); + ret = dwc3_ep0_set_address(dwc, ctrl); + break; + case USB_REQ_SET_CONFIGURATION: + dev_vdbg(dwc->dev, "USB_REQ_SET_CONFIGURATION\n"); + ret = dwc3_ep0_set_config(dwc, ctrl); + break; + default: + dev_vdbg(dwc->dev, "Forwarding to gadget driver\n"); + ret = dwc3_ep0_delegate_req(dwc, ctrl); + break; + }; + + return ret; +} + +static void dwc3_ep0_inspect_setup(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct usb_ctrlrequest *ctrl = dwc->ctrl_req; + int ret; + u32 len; + + if (!dwc->gadget_driver) + goto err; + + len = le16_to_cpu(ctrl->wLength); + if (!len) { + dwc->three_stage_setup = false; + dwc->ep0_expect_in = false; + dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS; + } else { + dwc->three_stage_setup = true; + dwc->ep0_expect_in = !!(ctrl->bRequestType & USB_DIR_IN); + dwc->ep0_next_event = DWC3_EP0_NRDY_DATA; + } + + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + ret = dwc3_ep0_std_request(dwc, ctrl); + else + ret = dwc3_ep0_delegate_req(dwc, ctrl); + + if (ret == USB_GADGET_DELAYED_STATUS) + dwc->delayed_status = true; + + if (ret >= 0) + return; + +err: + dwc3_ep0_stall_and_restart(dwc); +} + +static void dwc3_ep0_complete_data(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct dwc3_request *r = NULL; + struct usb_request *ur; + struct dwc3_trb *trb; + struct dwc3_ep *ep0; + u32 transferred; + u32 length; + u8 epnum; + + epnum = event->endpoint_number; + ep0 = dwc->eps[0]; + + dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS; + + r = next_request(&ep0->request_list); + ur = &r->request; + + trb = dwc->ep0_trb; + length = trb->size & DWC3_TRB_SIZE_MASK; + + if (dwc->ep0_bounced) { + unsigned transfer_size = ur->length; + unsigned maxp = ep0->endpoint.maxpacket; + + transfer_size += (maxp - (transfer_size % maxp)); + transferred = min_t(u32, ur->length, + transfer_size - length); + memcpy(ur->buf, dwc->ep0_bounce, transferred); + dwc->ep0_bounced = false; + } else { + transferred = ur->length - length; + } + + ur->actual += transferred; + + if ((epnum & 1) && ur->actual < ur->length) { + /* for some reason we did not get everything out */ + + dwc3_ep0_stall_and_restart(dwc); + } else { + /* + * handle the case where we have to send a zero packet. This + * seems to be case when req.length > maxpacket. Could it be? + */ + if (r) + dwc3_gadget_giveback(ep0, r, 0); + } +} + +static void dwc3_ep0_complete_req(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct dwc3_request *r; + struct dwc3_ep *dep; + + dep = dwc->eps[0]; + + if (!list_empty(&dep->request_list)) { + r = next_request(&dep->request_list); + + dwc3_gadget_giveback(dep, r, 0); + } + + if (dwc->test_mode) { + int ret; + + ret = dwc3_gadget_set_test_mode(dwc, dwc->test_mode_nr); + if (ret < 0) { + dev_dbg(dwc->dev, "Invalid Test #%d\n", + dwc->test_mode_nr); + dwc3_ep0_stall_and_restart(dwc); + } + } + + dwc->ep0state = EP0_SETUP_PHASE; + dwc3_ep0_out_start(dwc); +} + +static void dwc3_ep0_xfer_complete(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct dwc3_ep *dep = dwc->eps[event->endpoint_number]; + + dep->flags &= ~DWC3_EP_BUSY; + dep->res_trans_idx = 0; + dwc->setup_packet_pending = false; + + switch (dwc->ep0state) { + case EP0_SETUP_PHASE: + dev_vdbg(dwc->dev, "Inspecting Setup Bytes\n"); + dwc3_ep0_inspect_setup(dwc, event); + break; + + case EP0_DATA_PHASE: + dev_vdbg(dwc->dev, "Data Phase\n"); + dwc3_ep0_complete_data(dwc, event); + break; + + case EP0_STATUS_PHASE: + dev_vdbg(dwc->dev, "Status Phase\n"); + dwc3_ep0_complete_req(dwc, event); + break; + default: + WARN(true, "UNKNOWN ep0state %d\n", dwc->ep0state); + } +} + +static void dwc3_ep0_do_control_setup(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + dwc3_ep0_out_start(dwc); +} + +static void dwc3_ep0_do_control_data(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct dwc3_ep *dep; + struct dwc3_request *req; + int ret; + + dep = dwc->eps[0]; + + if (list_empty(&dep->request_list)) { + dev_vdbg(dwc->dev, "pending request for EP0 Data phase\n"); + dep->flags |= DWC3_EP_PENDING_REQUEST; + + if (event->endpoint_number) + dep->flags |= DWC3_EP0_DIR_IN; + return; + } + + req = next_request(&dep->request_list); + req->direction = !!event->endpoint_number; + + if (req->request.length == 0) { + ret = dwc3_ep0_start_trans(dwc, event->endpoint_number, + dwc->ctrl_req_addr, 0, + DWC3_TRBCTL_CONTROL_DATA); + } else if ((req->request.length % dep->endpoint.maxpacket) + && (event->endpoint_number == 0)) { + ret = usb_gadget_map_request(&dwc->gadget, &req->request, + event->endpoint_number); + if (ret) { + dev_dbg(dwc->dev, "failed to map request\n"); + return; + } + + WARN_ON(req->request.length > dep->endpoint.maxpacket); + + dwc->ep0_bounced = true; + + /* + * REVISIT in case request length is bigger than EP0 + * wMaxPacketSize, we will need two chained TRBs to handle + * the transfer. + */ + ret = dwc3_ep0_start_trans(dwc, event->endpoint_number, + dwc->ep0_bounce_addr, dep->endpoint.maxpacket, + DWC3_TRBCTL_CONTROL_DATA); + } else { + ret = usb_gadget_map_request(&dwc->gadget, &req->request, + event->endpoint_number); + if (ret) { + dev_dbg(dwc->dev, "failed to map request\n"); + return; + } + + ret = dwc3_ep0_start_trans(dwc, event->endpoint_number, + req->request.dma, req->request.length, + DWC3_TRBCTL_CONTROL_DATA); + } + + WARN_ON(ret < 0); +} + +static int dwc3_ep0_start_control_status(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; + u32 type; + + type = dwc->three_stage_setup ? DWC3_TRBCTL_CONTROL_STATUS3 + : DWC3_TRBCTL_CONTROL_STATUS2; + + return dwc3_ep0_start_trans(dwc, dep->number, + dwc->ctrl_req_addr, 0, type); +} + +static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum) +{ + struct dwc3_ep *dep = dwc->eps[epnum]; + + if (dwc->resize_fifos) { + dev_dbg(dwc->dev, "starting to resize fifos\n"); + dwc3_gadget_resize_tx_fifos(dwc); + dwc->resize_fifos = 0; + } + + WARN_ON(dwc3_ep0_start_control_status(dep)); +} + +static void dwc3_ep0_xfernotready(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + dwc->setup_packet_pending = true; + + /* + * This part is very tricky: If we has just handled + * XferNotReady(Setup) and we're now expecting a + * XferComplete but, instead, we receive another + * XferNotReady(Setup), we should STALL and restart + * the state machine. + * + * In all other cases, we just continue waiting + * for the XferComplete event. + * + * We are a little bit unsafe here because we're + * not trying to ensure that last event was, indeed, + * XferNotReady(Setup). + * + * Still, we don't expect any condition where that + * should happen and, even if it does, it would be + * another error condition. + */ + if (dwc->ep0_next_event == DWC3_EP0_COMPLETE) { + switch (event->status) { + case DEPEVT_STATUS_CONTROL_SETUP: + dev_vdbg(dwc->dev, "Unexpected XferNotReady(Setup)\n"); + dwc3_ep0_stall_and_restart(dwc); + break; + case DEPEVT_STATUS_CONTROL_DATA: + /* FALLTHROUGH */ + case DEPEVT_STATUS_CONTROL_STATUS: + /* FALLTHROUGH */ + default: + dev_vdbg(dwc->dev, "waiting for XferComplete\n"); + } + + return; + } + + switch (event->status) { + case DEPEVT_STATUS_CONTROL_SETUP: + dev_vdbg(dwc->dev, "Control Setup\n"); + + dwc->ep0state = EP0_SETUP_PHASE; + + dwc3_ep0_do_control_setup(dwc, event); + break; + + case DEPEVT_STATUS_CONTROL_DATA: + dev_vdbg(dwc->dev, "Control Data\n"); + + dwc->ep0state = EP0_DATA_PHASE; + + if (dwc->ep0_next_event != DWC3_EP0_NRDY_DATA) { + dev_vdbg(dwc->dev, "Expected %d got %d\n", + dwc->ep0_next_event, + DWC3_EP0_NRDY_DATA); + + dwc3_ep0_stall_and_restart(dwc); + return; + } + + /* + * One of the possible error cases is when Host _does_ + * request for Data Phase, but it does so on the wrong + * direction. + * + * Here, we already know ep0_next_event is DATA (see above), + * so we only need to check for direction. + */ + if (dwc->ep0_expect_in != event->endpoint_number) { + dev_vdbg(dwc->dev, "Wrong direction for Data phase\n"); + dwc3_ep0_stall_and_restart(dwc); + return; + } + + dwc3_ep0_do_control_data(dwc, event); + break; + + case DEPEVT_STATUS_CONTROL_STATUS: + dev_vdbg(dwc->dev, "Control Status\n"); + + dwc->ep0state = EP0_STATUS_PHASE; + + if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) { + dev_vdbg(dwc->dev, "Expected %d got %d\n", + dwc->ep0_next_event, + DWC3_EP0_NRDY_STATUS); + + dwc3_ep0_stall_and_restart(dwc); + return; + } + + if (dwc->delayed_status) { + WARN_ON_ONCE(event->endpoint_number != 1); + dev_vdbg(dwc->dev, "Mass Storage delayed status\n"); + return; + } + + dwc3_ep0_do_control_status(dwc, event->endpoint_number); + } +} + +void dwc3_ep0_interrupt(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + u8 epnum = event->endpoint_number; + + dev_dbg(dwc->dev, "%s while ep%d%s in state '%s'\n", + dwc3_ep_event_string(event->endpoint_event), + epnum >> 1, (epnum & 1) ? "in" : "out", + dwc3_ep0_state_string(dwc->ep0state)); + + switch (event->endpoint_event) { + case DWC3_DEPEVT_XFERCOMPLETE: + dwc3_ep0_xfer_complete(dwc, event); + break; + + case DWC3_DEPEVT_XFERNOTREADY: + dwc3_ep0_xfernotready(dwc, event); + break; + + case DWC3_DEPEVT_XFERINPROGRESS: + case DWC3_DEPEVT_RXTXFIFOEVT: + case DWC3_DEPEVT_STREAMEVT: + case DWC3_DEPEVT_EPCMDCMPLT: + break; + } +} diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c new file mode 100644 index 00000000..5255fe97 --- /dev/null +++ b/drivers/usb/dwc3/gadget.c @@ -0,0 +1,2396 @@ +/** + * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/list.h> +#include <linux/dma-mapping.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +#include "core.h" +#include "gadget.h" +#include "io.h" + +/** + * dwc3_gadget_set_test_mode - Enables USB2 Test Modes + * @dwc: pointer to our context structure + * @mode: the mode to set (J, K SE0 NAK, Force Enable) + * + * Caller should take care of locking. This function will + * return 0 on success or -EINVAL if wrong Test Selector + * is passed + */ +int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) +{ + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= ~DWC3_DCTL_TSTCTRL_MASK; + + switch (mode) { + case TEST_J: + case TEST_K: + case TEST_SE0_NAK: + case TEST_PACKET: + case TEST_FORCE_EN: + reg |= mode << 1; + break; + default: + return -EINVAL; + } + + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + return 0; +} + +/** + * dwc3_gadget_set_link_state - Sets USB Link to a particular State + * @dwc: pointer to our context structure + * @state: the state to put link into + * + * Caller should take care of locking. This function will + * return 0 on success or -ETIMEDOUT. + */ +int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) +{ + int retries = 10000; + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; + + /* set requested state */ + reg |= DWC3_DCTL_ULSTCHNGREQ(state); + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + /* wait for a change in DSTS */ + while (--retries) { + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + + if (DWC3_DSTS_USBLNKST(reg) == state) + return 0; + + udelay(5); + } + + dev_vdbg(dwc->dev, "link state change request timed out\n"); + + return -ETIMEDOUT; +} + +/** + * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case + * @dwc: pointer to our context structure + * + * This function will a best effort FIFO allocation in order + * to improve FIFO usage and throughput, while still allowing + * us to enable as many endpoints as possible. + * + * Keep in mind that this operation will be highly dependent + * on the configured size for RAM1 - which contains TxFifo -, + * the amount of endpoints enabled on coreConsultant tool, and + * the width of the Master Bus. + * + * In the ideal world, we would always be able to satisfy the + * following equation: + * + * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ + * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes + * + * Unfortunately, due to many variables that's not always the case. + */ +int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) +{ + int last_fifo_depth = 0; + int ram1_depth; + int fifo_size; + int mdwidth; + int num; + + if (!dwc->needs_fifo_resize) + return 0; + + ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); + mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); + + /* MDWIDTH is represented in bits, we need it in bytes */ + mdwidth >>= 3; + + /* + * FIXME For now we will only allocate 1 wMaxPacketSize space + * for each enabled endpoint, later patches will come to + * improve this algorithm so that we better use the internal + * FIFO space + */ + for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { + struct dwc3_ep *dep = dwc->eps[num]; + int fifo_number = dep->number >> 1; + int mult = 1; + int tmp; + + if (!(dep->number & 1)) + continue; + + if (!(dep->flags & DWC3_EP_ENABLED)) + continue; + + if (usb_endpoint_xfer_bulk(dep->desc) + || usb_endpoint_xfer_isoc(dep->desc)) + mult = 3; + + /* + * REVISIT: the following assumes we will always have enough + * space available on the FIFO RAM for all possible use cases. + * Make sure that's true somehow and change FIFO allocation + * accordingly. + * + * If we have Bulk or Isochronous endpoints, we want + * them to be able to be very, very fast. So we're giving + * those endpoints a fifo_size which is enough for 3 full + * packets + */ + tmp = mult * (dep->endpoint.maxpacket + mdwidth); + tmp += mdwidth; + + fifo_size = DIV_ROUND_UP(tmp, mdwidth); + + fifo_size |= (last_fifo_depth << 16); + + dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", + dep->name, last_fifo_depth, fifo_size & 0xffff); + + dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), + fifo_size); + + last_fifo_depth += (fifo_size & 0xffff); + } + + return 0; +} + +void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, + int status) +{ + struct dwc3 *dwc = dep->dwc; + + if (req->queued) { + if (req->request.num_mapped_sgs) + dep->busy_slot += req->request.num_mapped_sgs; + else + dep->busy_slot++; + + /* + * Skip LINK TRB. We can't use req->trb and check for + * DWC3_TRBCTL_LINK_TRB because it points the TRB we just + * completed (not the LINK TRB). + */ + if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && + usb_endpoint_xfer_isoc(dep->desc)) + dep->busy_slot++; + } + list_del(&req->list); + req->trb = NULL; + + if (req->request.status == -EINPROGRESS) + req->request.status = status; + + usb_gadget_unmap_request(&dwc->gadget, &req->request, + req->direction); + + dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", + req, dep->name, req->request.actual, + req->request.length, status); + + spin_unlock(&dwc->lock); + req->request.complete(&dep->endpoint, &req->request); + spin_lock(&dwc->lock); +} + +static const char *dwc3_gadget_ep_cmd_string(u8 cmd) +{ + switch (cmd) { + case DWC3_DEPCMD_DEPSTARTCFG: + return "Start New Configuration"; + case DWC3_DEPCMD_ENDTRANSFER: + return "End Transfer"; + case DWC3_DEPCMD_UPDATETRANSFER: + return "Update Transfer"; + case DWC3_DEPCMD_STARTTRANSFER: + return "Start Transfer"; + case DWC3_DEPCMD_CLEARSTALL: + return "Clear Stall"; + case DWC3_DEPCMD_SETSTALL: + return "Set Stall"; + case DWC3_DEPCMD_GETSEQNUMBER: + return "Get Data Sequence Number"; + case DWC3_DEPCMD_SETTRANSFRESOURCE: + return "Set Endpoint Transfer Resource"; + case DWC3_DEPCMD_SETEPCONFIG: + return "Set Endpoint Configuration"; + default: + return "UNKNOWN command"; + } +} + +int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, + unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) +{ + struct dwc3_ep *dep = dwc->eps[ep]; + u32 timeout = 500; + u32 reg; + + dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", + dep->name, + dwc3_gadget_ep_cmd_string(cmd), params->param0, + params->param1, params->param2); + + dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); + dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); + dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); + + dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); + do { + reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); + if (!(reg & DWC3_DEPCMD_CMDACT)) { + dev_vdbg(dwc->dev, "Command Complete --> %d\n", + DWC3_DEPCMD_STATUS(reg)); + return 0; + } + + /* + * We can't sleep here, because it is also called from + * interrupt context. + */ + timeout--; + if (!timeout) + return -ETIMEDOUT; + + udelay(1); + } while (1); +} + +static dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, + struct dwc3_trb *trb) +{ + u32 offset = (char *) trb - (char *) dep->trb_pool; + + return dep->trb_pool_dma + offset; +} + +static int dwc3_alloc_trb_pool(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; + + if (dep->trb_pool) + return 0; + + if (dep->number == 0 || dep->number == 1) + return 0; + + dep->trb_pool = dma_alloc_coherent(dwc->dev, + sizeof(struct dwc3_trb) * DWC3_TRB_NUM, + &dep->trb_pool_dma, GFP_KERNEL); + if (!dep->trb_pool) { + dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", + dep->name); + return -ENOMEM; + } + + return 0; +} + +static void dwc3_free_trb_pool(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; + + dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, + dep->trb_pool, dep->trb_pool_dma); + + dep->trb_pool = NULL; + dep->trb_pool_dma = 0; +} + +static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) +{ + struct dwc3_gadget_ep_cmd_params params; + u32 cmd; + + memset(¶ms, 0x00, sizeof(params)); + + if (dep->number != 1) { + cmd = DWC3_DEPCMD_DEPSTARTCFG; + /* XferRscIdx == 0 for ep0 and 2 for the remaining */ + if (dep->number > 1) { + if (dwc->start_config_issued) + return 0; + dwc->start_config_issued = true; + cmd |= DWC3_DEPCMD_PARAM(2); + } + + return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); + } + + return 0; +} + +static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, + const struct usb_endpoint_descriptor *desc, + const struct usb_ss_ep_comp_descriptor *comp_desc) +{ + struct dwc3_gadget_ep_cmd_params params; + + memset(¶ms, 0x00, sizeof(params)); + + params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) + | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) + | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); + + params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN + | DWC3_DEPCFG_XFER_NOT_READY_EN; + + if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { + params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE + | DWC3_DEPCFG_STREAM_EVENT_EN; + dep->stream_capable = true; + } + + if (usb_endpoint_xfer_isoc(desc)) + params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; + + /* + * We are doing 1:1 mapping for endpoints, meaning + * Physical Endpoints 2 maps to Logical Endpoint 2 and + * so on. We consider the direction bit as part of the physical + * endpoint number. So USB endpoint 0x81 is 0x03. + */ + params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); + + /* + * We must use the lower 16 TX FIFOs even though + * HW might have more + */ + if (dep->direction) + params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); + + if (desc->bInterval) { + params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); + dep->interval = 1 << (desc->bInterval - 1); + } + + return dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_SETEPCONFIG, ¶ms); +} + +static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) +{ + struct dwc3_gadget_ep_cmd_params params; + + memset(¶ms, 0x00, sizeof(params)); + + params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); + + return dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); +} + +/** + * __dwc3_gadget_ep_enable - Initializes a HW endpoint + * @dep: endpoint to be initialized + * @desc: USB Endpoint Descriptor + * + * Caller should take care of locking + */ +static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, + const struct usb_endpoint_descriptor *desc, + const struct usb_ss_ep_comp_descriptor *comp_desc) +{ + struct dwc3 *dwc = dep->dwc; + u32 reg; + int ret = -ENOMEM; + + if (!(dep->flags & DWC3_EP_ENABLED)) { + ret = dwc3_gadget_start_config(dwc, dep); + if (ret) + return ret; + } + + ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); + if (ret) + return ret; + + if (!(dep->flags & DWC3_EP_ENABLED)) { + struct dwc3_trb *trb_st_hw; + struct dwc3_trb *trb_link; + + ret = dwc3_gadget_set_xfer_resource(dwc, dep); + if (ret) + return ret; + + dep->desc = desc; + dep->comp_desc = comp_desc; + dep->type = usb_endpoint_type(desc); + dep->flags |= DWC3_EP_ENABLED; + + reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); + reg |= DWC3_DALEPENA_EP(dep->number); + dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); + + if (!usb_endpoint_xfer_isoc(desc)) + return 0; + + memset(&trb_link, 0, sizeof(trb_link)); + + /* Link TRB for ISOC. The HWO bit is never reset */ + trb_st_hw = &dep->trb_pool[0]; + + trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; + + trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); + trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); + trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; + trb_link->ctrl |= DWC3_TRB_CTRL_HWO; + } + + return 0; +} + +static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); +static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) +{ + struct dwc3_request *req; + + if (!list_empty(&dep->req_queued)) + dwc3_stop_active_transfer(dwc, dep->number); + + while (!list_empty(&dep->request_list)) { + req = next_request(&dep->request_list); + + dwc3_gadget_giveback(dep, req, -ESHUTDOWN); + } +} + +/** + * __dwc3_gadget_ep_disable - Disables a HW endpoint + * @dep: the endpoint to disable + * + * This function also removes requests which are currently processed ny the + * hardware and those which are not yet scheduled. + * Caller should take care of locking. + */ +static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; + u32 reg; + + dwc3_remove_requests(dwc, dep); + + reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); + reg &= ~DWC3_DALEPENA_EP(dep->number); + dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); + + dep->stream_capable = false; + dep->desc = NULL; + dep->endpoint.desc = NULL; + dep->comp_desc = NULL; + dep->type = 0; + dep->flags = 0; + + return 0; +} + +/* -------------------------------------------------------------------------- */ + +static int dwc3_gadget_ep0_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + return -EINVAL; +} + +static int dwc3_gadget_ep0_disable(struct usb_ep *ep) +{ + return -EINVAL; +} + +/* -------------------------------------------------------------------------- */ + +static int dwc3_gadget_ep_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + struct dwc3_ep *dep; + struct dwc3 *dwc; + unsigned long flags; + int ret; + + if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { + pr_debug("dwc3: invalid parameters\n"); + return -EINVAL; + } + + if (!desc->wMaxPacketSize) { + pr_debug("dwc3: missing wMaxPacketSize\n"); + return -EINVAL; + } + + dep = to_dwc3_ep(ep); + dwc = dep->dwc; + + switch (usb_endpoint_type(desc)) { + case USB_ENDPOINT_XFER_CONTROL: + strlcat(dep->name, "-control", sizeof(dep->name)); + break; + case USB_ENDPOINT_XFER_ISOC: + strlcat(dep->name, "-isoc", sizeof(dep->name)); + break; + case USB_ENDPOINT_XFER_BULK: + strlcat(dep->name, "-bulk", sizeof(dep->name)); + break; + case USB_ENDPOINT_XFER_INT: + strlcat(dep->name, "-int", sizeof(dep->name)); + break; + default: + dev_err(dwc->dev, "invalid endpoint transfer type\n"); + } + + if (dep->flags & DWC3_EP_ENABLED) { + dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", + dep->name); + return 0; + } + + dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); + + spin_lock_irqsave(&dwc->lock, flags); + ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static int dwc3_gadget_ep_disable(struct usb_ep *ep) +{ + struct dwc3_ep *dep; + struct dwc3 *dwc; + unsigned long flags; + int ret; + + if (!ep) { + pr_debug("dwc3: invalid parameters\n"); + return -EINVAL; + } + + dep = to_dwc3_ep(ep); + dwc = dep->dwc; + + if (!(dep->flags & DWC3_EP_ENABLED)) { + dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", + dep->name); + return 0; + } + + snprintf(dep->name, sizeof(dep->name), "ep%d%s", + dep->number >> 1, + (dep->number & 1) ? "in" : "out"); + + spin_lock_irqsave(&dwc->lock, flags); + ret = __dwc3_gadget_ep_disable(dep); + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, + gfp_t gfp_flags) +{ + struct dwc3_request *req; + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + + req = kzalloc(sizeof(*req), gfp_flags); + if (!req) { + dev_err(dwc->dev, "not enough memory\n"); + return NULL; + } + + req->epnum = dep->number; + req->dep = dep; + + return &req->request; +} + +static void dwc3_gadget_ep_free_request(struct usb_ep *ep, + struct usb_request *request) +{ + struct dwc3_request *req = to_dwc3_request(request); + + kfree(req); +} + +/** + * dwc3_prepare_one_trb - setup one TRB from one request + * @dep: endpoint for which this request is prepared + * @req: dwc3_request pointer + */ +static void dwc3_prepare_one_trb(struct dwc3_ep *dep, + struct dwc3_request *req, dma_addr_t dma, + unsigned length, unsigned last, unsigned chain) +{ + struct dwc3 *dwc = dep->dwc; + struct dwc3_trb *trb; + + unsigned int cur_slot; + + dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", + dep->name, req, (unsigned long long) dma, + length, last ? " last" : "", + chain ? " chain" : ""); + + trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; + cur_slot = dep->free_slot; + dep->free_slot++; + + /* Skip the LINK-TRB on ISOC */ + if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && + usb_endpoint_xfer_isoc(dep->desc)) + return; + + if (!req->trb) { + dwc3_gadget_move_request_queued(req); + req->trb = trb; + req->trb_dma = dwc3_trb_dma_offset(dep, trb); + } + + trb->size = DWC3_TRB_SIZE_LENGTH(length); + trb->bpl = lower_32_bits(dma); + trb->bph = upper_32_bits(dma); + + switch (usb_endpoint_type(dep->desc)) { + case USB_ENDPOINT_XFER_CONTROL: + trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; + break; + + case USB_ENDPOINT_XFER_ISOC: + trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; + + /* IOC every DWC3_TRB_NUM / 4 so we can refill */ + if (!(cur_slot % (DWC3_TRB_NUM / 4))) + trb->ctrl |= DWC3_TRB_CTRL_IOC; + break; + + case USB_ENDPOINT_XFER_BULK: + case USB_ENDPOINT_XFER_INT: + trb->ctrl = DWC3_TRBCTL_NORMAL; + break; + default: + /* + * This is only possible with faulty memory because we + * checked it already :) + */ + BUG(); + } + + if (usb_endpoint_xfer_isoc(dep->desc)) { + trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; + trb->ctrl |= DWC3_TRB_CTRL_CSP; + } else { + if (chain) + trb->ctrl |= DWC3_TRB_CTRL_CHN; + + if (last) + trb->ctrl |= DWC3_TRB_CTRL_LST; + } + + if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) + trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); + + trb->ctrl |= DWC3_TRB_CTRL_HWO; +} + +/* + * dwc3_prepare_trbs - setup TRBs from requests + * @dep: endpoint for which requests are being prepared + * @starting: true if the endpoint is idle and no requests are queued. + * + * The function goes through the requests list and sets up TRBs for the + * transfers. The function returns once there are no more TRBs available or + * it runs out of requests. + */ +static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) +{ + struct dwc3_request *req, *n; + u32 trbs_left; + u32 max; + unsigned int last_one = 0; + + BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); + + /* the first request must not be queued */ + trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; + + /* Can't wrap around on a non-isoc EP since there's no link TRB */ + if (!usb_endpoint_xfer_isoc(dep->desc)) { + max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); + if (trbs_left > max) + trbs_left = max; + } + + /* + * If busy & slot are equal than it is either full or empty. If we are + * starting to process requests then we are empty. Otherwise we are + * full and don't do anything + */ + if (!trbs_left) { + if (!starting) + return; + trbs_left = DWC3_TRB_NUM; + /* + * In case we start from scratch, we queue the ISOC requests + * starting from slot 1. This is done because we use ring + * buffer and have no LST bit to stop us. Instead, we place + * IOC bit every TRB_NUM/4. We try to avoid having an interrupt + * after the first request so we start at slot 1 and have + * 7 requests proceed before we hit the first IOC. + * Other transfer types don't use the ring buffer and are + * processed from the first TRB until the last one. Since we + * don't wrap around we have to start at the beginning. + */ + if (usb_endpoint_xfer_isoc(dep->desc)) { + dep->busy_slot = 1; + dep->free_slot = 1; + } else { + dep->busy_slot = 0; + dep->free_slot = 0; + } + } + + /* The last TRB is a link TRB, not used for xfer */ + if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) + return; + + list_for_each_entry_safe(req, n, &dep->request_list, list) { + unsigned length; + dma_addr_t dma; + + if (req->request.num_mapped_sgs > 0) { + struct usb_request *request = &req->request; + struct scatterlist *sg = request->sg; + struct scatterlist *s; + int i; + + for_each_sg(sg, s, request->num_mapped_sgs, i) { + unsigned chain = true; + + length = sg_dma_len(s); + dma = sg_dma_address(s); + + if (i == (request->num_mapped_sgs - 1) || + sg_is_last(s)) { + last_one = true; + chain = false; + } + + trbs_left--; + if (!trbs_left) + last_one = true; + + if (last_one) + chain = false; + + dwc3_prepare_one_trb(dep, req, dma, length, + last_one, chain); + + if (last_one) + break; + } + } else { + dma = req->request.dma; + length = req->request.length; + trbs_left--; + + if (!trbs_left) + last_one = 1; + + /* Is this the last request? */ + if (list_is_last(&req->list, &dep->request_list)) + last_one = 1; + + dwc3_prepare_one_trb(dep, req, dma, length, + last_one, false); + + if (last_one) + break; + } + } +} + +static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, + int start_new) +{ + struct dwc3_gadget_ep_cmd_params params; + struct dwc3_request *req; + struct dwc3 *dwc = dep->dwc; + int ret; + u32 cmd; + + if (start_new && (dep->flags & DWC3_EP_BUSY)) { + dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); + return -EBUSY; + } + dep->flags &= ~DWC3_EP_PENDING_REQUEST; + + /* + * If we are getting here after a short-out-packet we don't enqueue any + * new requests as we try to set the IOC bit only on the last request. + */ + if (start_new) { + if (list_empty(&dep->req_queued)) + dwc3_prepare_trbs(dep, start_new); + + /* req points to the first request which will be sent */ + req = next_request(&dep->req_queued); + } else { + dwc3_prepare_trbs(dep, start_new); + + /* + * req points to the first request where HWO changed from 0 to 1 + */ + req = next_request(&dep->req_queued); + } + if (!req) { + dep->flags |= DWC3_EP_PENDING_REQUEST; + return 0; + } + + memset(¶ms, 0, sizeof(params)); + params.param0 = upper_32_bits(req->trb_dma); + params.param1 = lower_32_bits(req->trb_dma); + + if (start_new) + cmd = DWC3_DEPCMD_STARTTRANSFER; + else + cmd = DWC3_DEPCMD_UPDATETRANSFER; + + cmd |= DWC3_DEPCMD_PARAM(cmd_param); + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); + if (ret < 0) { + dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); + + /* + * FIXME we need to iterate over the list of requests + * here and stop, unmap, free and del each of the linked + * requests instead of what we do now. + */ + usb_gadget_unmap_request(&dwc->gadget, &req->request, + req->direction); + list_del(&req->list); + return ret; + } + + dep->flags |= DWC3_EP_BUSY; + dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, + dep->number); + + WARN_ON_ONCE(!dep->res_trans_idx); + + return 0; +} + +static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) +{ + struct dwc3 *dwc = dep->dwc; + int ret; + + req->request.actual = 0; + req->request.status = -EINPROGRESS; + req->direction = dep->direction; + req->epnum = dep->number; + + /* + * We only add to our list of requests now and + * start consuming the list once we get XferNotReady + * IRQ. + * + * That way, we avoid doing anything that we don't need + * to do now and defer it until the point we receive a + * particular token from the Host side. + * + * This will also avoid Host cancelling URBs due to too + * many NAKs. + */ + ret = usb_gadget_map_request(&dwc->gadget, &req->request, + dep->direction); + if (ret) + return ret; + + list_add_tail(&req->list, &dep->request_list); + + /* + * There is one special case: XferNotReady with + * empty list of requests. We need to kick the + * transfer here in that situation, otherwise + * we will be NAKing forever. + * + * If we get XferNotReady before gadget driver + * has a chance to queue a request, we will ACK + * the IRQ but won't be able to receive the data + * until the next request is queued. The following + * code is handling exactly that. + */ + if (dep->flags & DWC3_EP_PENDING_REQUEST) { + int ret; + int start_trans; + + start_trans = 1; + if (usb_endpoint_xfer_isoc(dep->desc) && + (dep->flags & DWC3_EP_BUSY)) + start_trans = 0; + + ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); + if (ret && ret != -EBUSY) { + struct dwc3 *dwc = dep->dwc; + + dev_dbg(dwc->dev, "%s: failed to kick transfers\n", + dep->name); + } + }; + + return 0; +} + +static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, + gfp_t gfp_flags) +{ + struct dwc3_request *req = to_dwc3_request(request); + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + + unsigned long flags; + + int ret; + + if (!dep->desc) { + dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", + request, ep->name); + return -ESHUTDOWN; + } + + dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", + request, ep->name, request->length); + + spin_lock_irqsave(&dwc->lock, flags); + ret = __dwc3_gadget_ep_queue(dep, req); + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, + struct usb_request *request) +{ + struct dwc3_request *req = to_dwc3_request(request); + struct dwc3_request *r = NULL; + + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&dwc->lock, flags); + + list_for_each_entry(r, &dep->request_list, list) { + if (r == req) + break; + } + + if (r != req) { + list_for_each_entry(r, &dep->req_queued, list) { + if (r == req) + break; + } + if (r == req) { + /* wait until it is processed */ + dwc3_stop_active_transfer(dwc, dep->number); + goto out0; + } + dev_err(dwc->dev, "request %p was not queued to %s\n", + request, ep->name); + ret = -EINVAL; + goto out0; + } + + /* giveback the request */ + dwc3_gadget_giveback(dep, req, -ECONNRESET); + +out0: + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) +{ + struct dwc3_gadget_ep_cmd_params params; + struct dwc3 *dwc = dep->dwc; + int ret; + + memset(¶ms, 0x00, sizeof(params)); + + if (value) { + if (dep->number == 0 || dep->number == 1) { + /* + * Whenever EP0 is stalled, we will restart + * the state machine, thus moving back to + * Setup Phase + */ + dwc->ep0state = EP0_SETUP_PHASE; + } + + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_SETSTALL, ¶ms); + if (ret) + dev_err(dwc->dev, "failed to %s STALL on %s\n", + value ? "set" : "clear", + dep->name); + else + dep->flags |= DWC3_EP_STALL; + } else { + if (dep->flags & DWC3_EP_WEDGE) + return 0; + + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_CLEARSTALL, ¶ms); + if (ret) + dev_err(dwc->dev, "failed to %s STALL on %s\n", + value ? "set" : "clear", + dep->name); + else + dep->flags &= ~DWC3_EP_STALL; + } + + return ret; +} + +static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) +{ + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + + unsigned long flags; + + int ret; + + spin_lock_irqsave(&dwc->lock, flags); + + if (usb_endpoint_xfer_isoc(dep->desc)) { + dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); + ret = -EINVAL; + goto out; + } + + ret = __dwc3_gadget_ep_set_halt(dep, value); +out: + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) +{ + struct dwc3_ep *dep = to_dwc3_ep(ep); + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + dep->flags |= DWC3_EP_WEDGE; + spin_unlock_irqrestore(&dwc->lock, flags); + + return dwc3_gadget_ep_set_halt(ep, 1); +} + +/* -------------------------------------------------------------------------- */ + +static struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, +}; + +static const struct usb_ep_ops dwc3_gadget_ep0_ops = { + .enable = dwc3_gadget_ep0_enable, + .disable = dwc3_gadget_ep0_disable, + .alloc_request = dwc3_gadget_ep_alloc_request, + .free_request = dwc3_gadget_ep_free_request, + .queue = dwc3_gadget_ep0_queue, + .dequeue = dwc3_gadget_ep_dequeue, + .set_halt = dwc3_gadget_ep_set_halt, + .set_wedge = dwc3_gadget_ep_set_wedge, +}; + +static const struct usb_ep_ops dwc3_gadget_ep_ops = { + .enable = dwc3_gadget_ep_enable, + .disable = dwc3_gadget_ep_disable, + .alloc_request = dwc3_gadget_ep_alloc_request, + .free_request = dwc3_gadget_ep_free_request, + .queue = dwc3_gadget_ep_queue, + .dequeue = dwc3_gadget_ep_dequeue, + .set_halt = dwc3_gadget_ep_set_halt, + .set_wedge = dwc3_gadget_ep_set_wedge, +}; + +/* -------------------------------------------------------------------------- */ + +static int dwc3_gadget_get_frame(struct usb_gadget *g) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + return DWC3_DSTS_SOFFN(reg); +} + +static int dwc3_gadget_wakeup(struct usb_gadget *g) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + + unsigned long timeout; + unsigned long flags; + + u32 reg; + + int ret = 0; + + u8 link_state; + u8 speed; + + spin_lock_irqsave(&dwc->lock, flags); + + /* + * According to the Databook Remote wakeup request should + * be issued only when the device is in early suspend state. + * + * We can check that via USB Link State bits in DSTS register. + */ + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + + speed = reg & DWC3_DSTS_CONNECTSPD; + if (speed == DWC3_DSTS_SUPERSPEED) { + dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); + ret = -EINVAL; + goto out; + } + + link_state = DWC3_DSTS_USBLNKST(reg); + + switch (link_state) { + case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ + case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ + break; + default: + dev_dbg(dwc->dev, "can't wakeup from link state %d\n", + link_state); + ret = -EINVAL; + goto out; + } + + ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); + if (ret < 0) { + dev_err(dwc->dev, "failed to put link in Recovery\n"); + goto out; + } + + /* write zeroes to Link Change Request */ + reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + /* poll until Link State changes to ON */ + timeout = jiffies + msecs_to_jiffies(100); + + while (!time_after(jiffies, timeout)) { + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + + /* in HS, means ON */ + if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) + break; + } + + if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { + dev_err(dwc->dev, "failed to send remote wakeup\n"); + ret = -EINVAL; + } + +out: + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static int dwc3_gadget_set_selfpowered(struct usb_gadget *g, + int is_selfpowered) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + dwc->is_selfpowered = !!is_selfpowered; + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) +{ + u32 reg; + u32 timeout = 500; + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + if (is_on) { + reg &= ~DWC3_DCTL_TRGTULST_MASK; + reg |= (DWC3_DCTL_RUN_STOP + | DWC3_DCTL_TRGTULST_RX_DET); + } else { + reg &= ~DWC3_DCTL_RUN_STOP; + } + + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + do { + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + if (is_on) { + if (!(reg & DWC3_DSTS_DEVCTRLHLT)) + break; + } else { + if (reg & DWC3_DSTS_DEVCTRLHLT) + break; + } + timeout--; + if (!timeout) + break; + udelay(1); + } while (1); + + dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", + dwc->gadget_driver + ? dwc->gadget_driver->function : "no-function", + is_on ? "connect" : "disconnect"); +} + +static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + unsigned long flags; + + is_on = !!is_on; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_run_stop(dwc, is_on); + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static int dwc3_gadget_start(struct usb_gadget *g, + struct usb_gadget_driver *driver) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + struct dwc3_ep *dep; + unsigned long flags; + int ret = 0; + u32 reg; + + spin_lock_irqsave(&dwc->lock, flags); + + if (dwc->gadget_driver) { + dev_err(dwc->dev, "%s is already bound to %s\n", + dwc->gadget.name, + dwc->gadget_driver->driver.name); + ret = -EBUSY; + goto err0; + } + + dwc->gadget_driver = driver; + dwc->gadget.dev.driver = &driver->driver; + + reg = dwc3_readl(dwc->regs, DWC3_DCFG); + reg &= ~(DWC3_DCFG_SPEED_MASK); + reg |= dwc->maximum_speed; + dwc3_writel(dwc->regs, DWC3_DCFG, reg); + + dwc->start_config_issued = false; + + /* Start with SuperSpeed Default */ + dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); + + dep = dwc->eps[0]; + ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); + if (ret) { + dev_err(dwc->dev, "failed to enable %s\n", dep->name); + goto err0; + } + + dep = dwc->eps[1]; + ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); + if (ret) { + dev_err(dwc->dev, "failed to enable %s\n", dep->name); + goto err1; + } + + /* begin to receive SETUP packets */ + dwc->ep0state = EP0_SETUP_PHASE; + dwc3_ep0_out_start(dwc); + + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; + +err1: + __dwc3_gadget_ep_disable(dwc->eps[0]); + +err0: + spin_unlock_irqrestore(&dwc->lock, flags); + + return ret; +} + +static int dwc3_gadget_stop(struct usb_gadget *g, + struct usb_gadget_driver *driver) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + + __dwc3_gadget_ep_disable(dwc->eps[0]); + __dwc3_gadget_ep_disable(dwc->eps[1]); + + dwc->gadget_driver = NULL; + dwc->gadget.dev.driver = NULL; + + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} +static const struct usb_gadget_ops dwc3_gadget_ops = { + .get_frame = dwc3_gadget_get_frame, + .wakeup = dwc3_gadget_wakeup, + .set_selfpowered = dwc3_gadget_set_selfpowered, + .pullup = dwc3_gadget_pullup, + .udc_start = dwc3_gadget_start, + .udc_stop = dwc3_gadget_stop, +}; + +/* -------------------------------------------------------------------------- */ + +static int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) +{ + struct dwc3_ep *dep; + u8 epnum; + + INIT_LIST_HEAD(&dwc->gadget.ep_list); + + for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { + dep = kzalloc(sizeof(*dep), GFP_KERNEL); + if (!dep) { + dev_err(dwc->dev, "can't allocate endpoint %d\n", + epnum); + return -ENOMEM; + } + + dep->dwc = dwc; + dep->number = epnum; + dwc->eps[epnum] = dep; + + snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, + (epnum & 1) ? "in" : "out"); + dep->endpoint.name = dep->name; + dep->direction = (epnum & 1); + + if (epnum == 0 || epnum == 1) { + dep->endpoint.maxpacket = 512; + dep->endpoint.ops = &dwc3_gadget_ep0_ops; + if (!epnum) + dwc->gadget.ep0 = &dep->endpoint; + } else { + int ret; + + dep->endpoint.maxpacket = 1024; + dep->endpoint.max_streams = 15; + dep->endpoint.ops = &dwc3_gadget_ep_ops; + list_add_tail(&dep->endpoint.ep_list, + &dwc->gadget.ep_list); + + ret = dwc3_alloc_trb_pool(dep); + if (ret) + return ret; + } + + INIT_LIST_HEAD(&dep->request_list); + INIT_LIST_HEAD(&dep->req_queued); + } + + return 0; +} + +static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) +{ + struct dwc3_ep *dep; + u8 epnum; + + for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { + dep = dwc->eps[epnum]; + dwc3_free_trb_pool(dep); + + if (epnum != 0 && epnum != 1) + list_del(&dep->endpoint.ep_list); + + kfree(dep); + } +} + +static void dwc3_gadget_release(struct device *dev) +{ + dev_dbg(dev, "%s\n", __func__); +} + +/* -------------------------------------------------------------------------- */ +static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, + const struct dwc3_event_depevt *event, int status) +{ + struct dwc3_request *req; + struct dwc3_trb *trb; + unsigned int count; + unsigned int s_pkt = 0; + + do { + req = next_request(&dep->req_queued); + if (!req) { + WARN_ON_ONCE(1); + return 1; + } + + trb = req->trb; + + if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) + /* + * We continue despite the error. There is not much we + * can do. If we don't clean it up we loop forever. If + * we skip the TRB then it gets overwritten after a + * while since we use them in a ring buffer. A BUG() + * would help. Lets hope that if this occurs, someone + * fixes the root cause instead of looking away :) + */ + dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", + dep->name, req->trb); + count = trb->size & DWC3_TRB_SIZE_MASK; + + if (dep->direction) { + if (count) { + dev_err(dwc->dev, "incomplete IN transfer %s\n", + dep->name); + status = -ECONNRESET; + } + } else { + if (count && (event->status & DEPEVT_STATUS_SHORT)) + s_pkt = 1; + } + + /* + * We assume here we will always receive the entire data block + * which we should receive. Meaning, if we program RX to + * receive 4K but we receive only 2K, we assume that's all we + * should receive and we simply bounce the request back to the + * gadget driver for further processing. + */ + req->request.actual += req->request.length - count; + dwc3_gadget_giveback(dep, req, status); + if (s_pkt) + break; + if ((event->status & DEPEVT_STATUS_LST) && + (trb->ctrl & DWC3_TRB_CTRL_LST)) + break; + if ((event->status & DEPEVT_STATUS_IOC) && + (trb->ctrl & DWC3_TRB_CTRL_IOC)) + break; + } while (1); + + if ((event->status & DEPEVT_STATUS_IOC) && + (trb->ctrl & DWC3_TRB_CTRL_IOC)) + return 0; + return 1; +} + +static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, + struct dwc3_ep *dep, const struct dwc3_event_depevt *event, + int start_new) +{ + unsigned status = 0; + int clean_busy; + + if (event->status & DEPEVT_STATUS_BUSERR) + status = -ECONNRESET; + + clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); + if (clean_busy) + dep->flags &= ~DWC3_EP_BUSY; + + /* + * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. + * See dwc3_gadget_linksts_change_interrupt() for 1st half. + */ + if (dwc->revision < DWC3_REVISION_183A) { + u32 reg; + int i; + + for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { + struct dwc3_ep *dep = dwc->eps[i]; + + if (!(dep->flags & DWC3_EP_ENABLED)) + continue; + + if (!list_empty(&dep->req_queued)) + return; + } + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg |= dwc->u1u2; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + dwc->u1u2 = 0; + } +} + +static void dwc3_gadget_start_isoc(struct dwc3 *dwc, + struct dwc3_ep *dep, const struct dwc3_event_depevt *event) +{ + u32 uf, mask; + + if (list_empty(&dep->request_list)) { + dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", + dep->name); + return; + } + + mask = ~(dep->interval - 1); + uf = event->parameters & mask; + /* 4 micro frames in the future */ + uf += dep->interval * 4; + + __dwc3_gadget_kick_transfer(dep, uf, 1); +} + +static void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event) +{ + struct dwc3 *dwc = dep->dwc; + struct dwc3_event_depevt mod_ev = *event; + + /* + * We were asked to remove one request. It is possible that this + * request and a few others were started together and have the same + * transfer index. Since we stopped the complete endpoint we don't + * know how many requests were already completed (and not yet) + * reported and how could be done (later). We purge them all until + * the end of the list. + */ + mod_ev.status = DEPEVT_STATUS_LST; + dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); + dep->flags &= ~DWC3_EP_BUSY; + /* pending requests are ignored and are queued on XferNotReady */ +} + +static void dwc3_ep_cmd_compl(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event) +{ + u32 param = event->parameters; + u32 cmd_type = (param >> 8) & ((1 << 5) - 1); + + switch (cmd_type) { + case DWC3_DEPCMD_ENDTRANSFER: + dwc3_process_ep_cmd_complete(dep, event); + break; + case DWC3_DEPCMD_STARTTRANSFER: + dep->res_trans_idx = param & 0x7f; + break; + default: + printk(KERN_ERR "%s() unknown /unexpected type: %d\n", + __func__, cmd_type); + break; + }; +} + +static void dwc3_endpoint_interrupt(struct dwc3 *dwc, + const struct dwc3_event_depevt *event) +{ + struct dwc3_ep *dep; + u8 epnum = event->endpoint_number; + + dep = dwc->eps[epnum]; + + dev_vdbg(dwc->dev, "%s: %s\n", dep->name, + dwc3_ep_event_string(event->endpoint_event)); + + if (epnum == 0 || epnum == 1) { + dwc3_ep0_interrupt(dwc, event); + return; + } + + switch (event->endpoint_event) { + case DWC3_DEPEVT_XFERCOMPLETE: + dep->res_trans_idx = 0; + + if (usb_endpoint_xfer_isoc(dep->desc)) { + dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", + dep->name); + return; + } + + dwc3_endpoint_transfer_complete(dwc, dep, event, 1); + break; + case DWC3_DEPEVT_XFERINPROGRESS: + if (!usb_endpoint_xfer_isoc(dep->desc)) { + dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", + dep->name); + return; + } + + dwc3_endpoint_transfer_complete(dwc, dep, event, 0); + break; + case DWC3_DEPEVT_XFERNOTREADY: + if (usb_endpoint_xfer_isoc(dep->desc)) { + dwc3_gadget_start_isoc(dwc, dep, event); + } else { + int ret; + + dev_vdbg(dwc->dev, "%s: reason %s\n", + dep->name, event->status & + DEPEVT_STATUS_TRANSFER_ACTIVE + ? "Transfer Active" + : "Transfer Not Active"); + + ret = __dwc3_gadget_kick_transfer(dep, 0, 1); + if (!ret || ret == -EBUSY) + return; + + dev_dbg(dwc->dev, "%s: failed to kick transfers\n", + dep->name); + } + + break; + case DWC3_DEPEVT_STREAMEVT: + if (!usb_endpoint_xfer_bulk(dep->desc)) { + dev_err(dwc->dev, "Stream event for non-Bulk %s\n", + dep->name); + return; + } + + switch (event->status) { + case DEPEVT_STREAMEVT_FOUND: + dev_vdbg(dwc->dev, "Stream %d found and started\n", + event->parameters); + + break; + case DEPEVT_STREAMEVT_NOTFOUND: + /* FALLTHROUGH */ + default: + dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); + } + break; + case DWC3_DEPEVT_RXTXFIFOEVT: + dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); + break; + case DWC3_DEPEVT_EPCMDCMPLT: + dwc3_ep_cmd_compl(dep, event); + break; + } +} + +static void dwc3_disconnect_gadget(struct dwc3 *dwc) +{ + if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { + spin_unlock(&dwc->lock); + dwc->gadget_driver->disconnect(&dwc->gadget); + spin_lock(&dwc->lock); + } +} + +static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) +{ + struct dwc3_ep *dep; + struct dwc3_gadget_ep_cmd_params params; + u32 cmd; + int ret; + + dep = dwc->eps[epnum]; + + WARN_ON(!dep->res_trans_idx); + if (dep->res_trans_idx) { + cmd = DWC3_DEPCMD_ENDTRANSFER; + cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; + cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); + memset(¶ms, 0, sizeof(params)); + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); + WARN_ON_ONCE(ret); + dep->res_trans_idx = 0; + } +} + +static void dwc3_stop_active_transfers(struct dwc3 *dwc) +{ + u32 epnum; + + for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { + struct dwc3_ep *dep; + + dep = dwc->eps[epnum]; + if (!(dep->flags & DWC3_EP_ENABLED)) + continue; + + dwc3_remove_requests(dwc, dep); + } +} + +static void dwc3_clear_stall_all_ep(struct dwc3 *dwc) +{ + u32 epnum; + + for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { + struct dwc3_ep *dep; + struct dwc3_gadget_ep_cmd_params params; + int ret; + + dep = dwc->eps[epnum]; + + if (!(dep->flags & DWC3_EP_STALL)) + continue; + + dep->flags &= ~DWC3_EP_STALL; + + memset(¶ms, 0, sizeof(params)); + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, + DWC3_DEPCMD_CLEARSTALL, ¶ms); + WARN_ON_ONCE(ret); + } +} + +static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) +{ + dev_vdbg(dwc->dev, "%s\n", __func__); +#if 0 + XXX + U1/U2 is powersave optimization. Skip it for now. Anyway we need to + enable it before we can disable it. + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= ~DWC3_DCTL_INITU1ENA; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + + reg &= ~DWC3_DCTL_INITU2ENA; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); +#endif + + dwc3_stop_active_transfers(dwc); + dwc3_disconnect_gadget(dwc); + dwc->start_config_issued = false; + + dwc->gadget.speed = USB_SPEED_UNKNOWN; + dwc->setup_packet_pending = false; +} + +static void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) +{ + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); + + if (on) + reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; + else + reg |= DWC3_GUSB3PIPECTL_SUSPHY; + + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); +} + +static void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) +{ + u32 reg; + + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + + if (on) + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; + else + reg |= DWC3_GUSB2PHYCFG_SUSPHY; + + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); +} + +static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) +{ + u32 reg; + + dev_vdbg(dwc->dev, "%s\n", __func__); + + /* + * WORKAROUND: DWC3 revisions <1.88a have an issue which + * would cause a missing Disconnect Event if there's a + * pending Setup Packet in the FIFO. + * + * There's no suggested workaround on the official Bug + * report, which states that "unless the driver/application + * is doing any special handling of a disconnect event, + * there is no functional issue". + * + * Unfortunately, it turns out that we _do_ some special + * handling of a disconnect event, namely complete all + * pending transfers, notify gadget driver of the + * disconnection, and so on. + * + * Our suggested workaround is to follow the Disconnect + * Event steps here, instead, based on a setup_packet_pending + * flag. Such flag gets set whenever we have a XferNotReady + * event on EP0 and gets cleared on XferComplete for the + * same endpoint. + * + * Refers to: + * + * STAR#9000466709: RTL: Device : Disconnect event not + * generated if setup packet pending in FIFO + */ + if (dwc->revision < DWC3_REVISION_188A) { + if (dwc->setup_packet_pending) + dwc3_gadget_disconnect_interrupt(dwc); + } + + /* after reset -> Default State */ + dwc->dev_state = DWC3_DEFAULT_STATE; + + /* Enable PHYs */ + dwc3_gadget_usb2_phy_power(dwc, true); + dwc3_gadget_usb3_phy_power(dwc, true); + + if (dwc->gadget.speed != USB_SPEED_UNKNOWN) + dwc3_disconnect_gadget(dwc); + + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= ~DWC3_DCTL_TSTCTRL_MASK; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + dwc->test_mode = false; + + dwc3_stop_active_transfers(dwc); + dwc3_clear_stall_all_ep(dwc); + dwc->start_config_issued = false; + + /* Reset device address to zero */ + reg = dwc3_readl(dwc->regs, DWC3_DCFG); + reg &= ~(DWC3_DCFG_DEVADDR_MASK); + dwc3_writel(dwc->regs, DWC3_DCFG, reg); +} + +static void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) +{ + u32 reg; + u32 usb30_clock = DWC3_GCTL_CLK_BUS; + + /* + * We change the clock only at SS but I dunno why I would want to do + * this. Maybe it becomes part of the power saving plan. + */ + + if (speed != DWC3_DSTS_SUPERSPEED) + return; + + /* + * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed + * each time on Connect Done. + */ + if (!usb30_clock) + return; + + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); + dwc3_writel(dwc->regs, DWC3_GCTL, reg); +} + +static void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) +{ + switch (speed) { + case USB_SPEED_SUPER: + dwc3_gadget_usb2_phy_power(dwc, false); + break; + case USB_SPEED_HIGH: + case USB_SPEED_FULL: + case USB_SPEED_LOW: + dwc3_gadget_usb3_phy_power(dwc, false); + break; + } +} + +static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) +{ + struct dwc3_gadget_ep_cmd_params params; + struct dwc3_ep *dep; + int ret; + u32 reg; + u8 speed; + + dev_vdbg(dwc->dev, "%s\n", __func__); + + memset(¶ms, 0x00, sizeof(params)); + + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + speed = reg & DWC3_DSTS_CONNECTSPD; + dwc->speed = speed; + + dwc3_update_ram_clk_sel(dwc, speed); + + switch (speed) { + case DWC3_DCFG_SUPERSPEED: + /* + * WORKAROUND: DWC3 revisions <1.90a have an issue which + * would cause a missing USB3 Reset event. + * + * In such situations, we should force a USB3 Reset + * event by calling our dwc3_gadget_reset_interrupt() + * routine. + * + * Refers to: + * + * STAR#9000483510: RTL: SS : USB3 reset event may + * not be generated always when the link enters poll + */ + if (dwc->revision < DWC3_REVISION_190A) + dwc3_gadget_reset_interrupt(dwc); + + dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); + dwc->gadget.ep0->maxpacket = 512; + dwc->gadget.speed = USB_SPEED_SUPER; + break; + case DWC3_DCFG_HIGHSPEED: + dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); + dwc->gadget.ep0->maxpacket = 64; + dwc->gadget.speed = USB_SPEED_HIGH; + break; + case DWC3_DCFG_FULLSPEED2: + case DWC3_DCFG_FULLSPEED1: + dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); + dwc->gadget.ep0->maxpacket = 64; + dwc->gadget.speed = USB_SPEED_FULL; + break; + case DWC3_DCFG_LOWSPEED: + dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); + dwc->gadget.ep0->maxpacket = 8; + dwc->gadget.speed = USB_SPEED_LOW; + break; + } + + /* Disable unneded PHY */ + dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); + + dep = dwc->eps[0]; + ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); + if (ret) { + dev_err(dwc->dev, "failed to enable %s\n", dep->name); + return; + } + + dep = dwc->eps[1]; + ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); + if (ret) { + dev_err(dwc->dev, "failed to enable %s\n", dep->name); + return; + } + + /* + * Configure PHY via GUSB3PIPECTLn if required. + * + * Update GTXFIFOSIZn + * + * In both cases reset values should be sufficient. + */ +} + +static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) +{ + dev_vdbg(dwc->dev, "%s\n", __func__); + + /* + * TODO take core out of low power mode when that's + * implemented. + */ + + dwc->gadget_driver->resume(&dwc->gadget); +} + +static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, + unsigned int evtinfo) +{ + enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; + + /* + * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending + * on the link partner, the USB session might do multiple entry/exit + * of low power states before a transfer takes place. + * + * Due to this problem, we might experience lower throughput. The + * suggested workaround is to disable DCTL[12:9] bits if we're + * transitioning from U1/U2 to U0 and enable those bits again + * after a transfer completes and there are no pending transfers + * on any of the enabled endpoints. + * + * This is the first half of that workaround. + * + * Refers to: + * + * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us + * core send LGO_Ux entering U0 + */ + if (dwc->revision < DWC3_REVISION_183A) { + if (next == DWC3_LINK_STATE_U0) { + u32 u1u2; + u32 reg; + + switch (dwc->link_state) { + case DWC3_LINK_STATE_U1: + case DWC3_LINK_STATE_U2: + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + u1u2 = reg & (DWC3_DCTL_INITU2ENA + | DWC3_DCTL_ACCEPTU2ENA + | DWC3_DCTL_INITU1ENA + | DWC3_DCTL_ACCEPTU1ENA); + + if (!dwc->u1u2) + dwc->u1u2 = reg & u1u2; + + reg &= ~u1u2; + + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + break; + default: + /* do nothing */ + break; + } + } + } + + dwc->link_state = next; + + dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); +} + +static void dwc3_gadget_interrupt(struct dwc3 *dwc, + const struct dwc3_event_devt *event) +{ + switch (event->type) { + case DWC3_DEVICE_EVENT_DISCONNECT: + dwc3_gadget_disconnect_interrupt(dwc); + break; + case DWC3_DEVICE_EVENT_RESET: + dwc3_gadget_reset_interrupt(dwc); + break; + case DWC3_DEVICE_EVENT_CONNECT_DONE: + dwc3_gadget_conndone_interrupt(dwc); + break; + case DWC3_DEVICE_EVENT_WAKEUP: + dwc3_gadget_wakeup_interrupt(dwc); + break; + case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: + dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); + break; + case DWC3_DEVICE_EVENT_EOPF: + dev_vdbg(dwc->dev, "End of Periodic Frame\n"); + break; + case DWC3_DEVICE_EVENT_SOF: + dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); + break; + case DWC3_DEVICE_EVENT_ERRATIC_ERROR: + dev_vdbg(dwc->dev, "Erratic Error\n"); + break; + case DWC3_DEVICE_EVENT_CMD_CMPL: + dev_vdbg(dwc->dev, "Command Complete\n"); + break; + case DWC3_DEVICE_EVENT_OVERFLOW: + dev_vdbg(dwc->dev, "Overflow\n"); + break; + default: + dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); + } +} + +static void dwc3_process_event_entry(struct dwc3 *dwc, + const union dwc3_event *event) +{ + /* Endpoint IRQ, handle it and return early */ + if (event->type.is_devspec == 0) { + /* depevt */ + return dwc3_endpoint_interrupt(dwc, &event->depevt); + } + + switch (event->type.type) { + case DWC3_EVENT_TYPE_DEV: + dwc3_gadget_interrupt(dwc, &event->devt); + break; + /* REVISIT what to do with Carkit and I2C events ? */ + default: + dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); + } +} + +static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) +{ + struct dwc3_event_buffer *evt; + int left; + u32 count; + + count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); + count &= DWC3_GEVNTCOUNT_MASK; + if (!count) + return IRQ_NONE; + + evt = dwc->ev_buffs[buf]; + left = count; + + while (left > 0) { + union dwc3_event event; + + event.raw = *(u32 *) (evt->buf + evt->lpos); + + dwc3_process_event_entry(dwc, &event); + /* + * XXX we wrap around correctly to the next entry as almost all + * entries are 4 bytes in size. There is one entry which has 12 + * bytes which is a regular entry followed by 8 bytes data. ATM + * I don't know how things are organized if were get next to the + * a boundary so I worry about that once we try to handle that. + */ + evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; + left -= 4; + + dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); + } + + return IRQ_HANDLED; +} + +static irqreturn_t dwc3_interrupt(int irq, void *_dwc) +{ + struct dwc3 *dwc = _dwc; + int i; + irqreturn_t ret = IRQ_NONE; + + spin_lock(&dwc->lock); + + for (i = 0; i < dwc->num_event_buffers; i++) { + irqreturn_t status; + + status = dwc3_process_event_buf(dwc, i); + if (status == IRQ_HANDLED) + ret = status; + } + + spin_unlock(&dwc->lock); + + return ret; +} + +/** + * dwc3_gadget_init - Initializes gadget related registers + * @dwc: pointer to our controller context structure + * + * Returns 0 on success otherwise negative errno. + */ +int __devinit dwc3_gadget_init(struct dwc3 *dwc) +{ + u32 reg; + int ret; + int irq; + + dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), + &dwc->ctrl_req_addr, GFP_KERNEL); + if (!dwc->ctrl_req) { + dev_err(dwc->dev, "failed to allocate ctrl request\n"); + ret = -ENOMEM; + goto err0; + } + + dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), + &dwc->ep0_trb_addr, GFP_KERNEL); + if (!dwc->ep0_trb) { + dev_err(dwc->dev, "failed to allocate ep0 trb\n"); + ret = -ENOMEM; + goto err1; + } + + dwc->setup_buf = kzalloc(sizeof(*dwc->setup_buf) * 2, + GFP_KERNEL); + if (!dwc->setup_buf) { + dev_err(dwc->dev, "failed to allocate setup buffer\n"); + ret = -ENOMEM; + goto err2; + } + + dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, + 512, &dwc->ep0_bounce_addr, GFP_KERNEL); + if (!dwc->ep0_bounce) { + dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); + ret = -ENOMEM; + goto err3; + } + + dev_set_name(&dwc->gadget.dev, "gadget"); + + dwc->gadget.ops = &dwc3_gadget_ops; + dwc->gadget.max_speed = USB_SPEED_SUPER; + dwc->gadget.speed = USB_SPEED_UNKNOWN; + dwc->gadget.dev.parent = dwc->dev; + dwc->gadget.sg_supported = true; + + dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); + + dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; + dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; + dwc->gadget.dev.release = dwc3_gadget_release; + dwc->gadget.name = "dwc3-gadget"; + + /* + * REVISIT: Here we should clear all pending IRQs to be + * sure we're starting from a well known location. + */ + + ret = dwc3_gadget_init_endpoints(dwc); + if (ret) + goto err4; + + irq = platform_get_irq(to_platform_device(dwc->dev), 0); + + ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, + "dwc3", dwc); + if (ret) { + dev_err(dwc->dev, "failed to request irq #%d --> %d\n", + irq, ret); + goto err5; + } + + /* Enable all but Start and End of Frame IRQs */ + reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | + DWC3_DEVTEN_EVNTOVERFLOWEN | + DWC3_DEVTEN_CMDCMPLTEN | + DWC3_DEVTEN_ERRTICERREN | + DWC3_DEVTEN_WKUPEVTEN | + DWC3_DEVTEN_ULSTCNGEN | + DWC3_DEVTEN_CONNECTDONEEN | + DWC3_DEVTEN_USBRSTEN | + DWC3_DEVTEN_DISCONNEVTEN); + dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); + + ret = device_register(&dwc->gadget.dev); + if (ret) { + dev_err(dwc->dev, "failed to register gadget device\n"); + put_device(&dwc->gadget.dev); + goto err6; + } + + ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); + if (ret) { + dev_err(dwc->dev, "failed to register udc\n"); + goto err7; + } + + return 0; + +err7: + device_unregister(&dwc->gadget.dev); + +err6: + dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); + free_irq(irq, dwc); + +err5: + dwc3_gadget_free_endpoints(dwc); + +err4: + dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, + dwc->ep0_bounce_addr); + +err3: + kfree(dwc->setup_buf); + +err2: + dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), + dwc->ep0_trb, dwc->ep0_trb_addr); + +err1: + dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), + dwc->ctrl_req, dwc->ctrl_req_addr); + +err0: + return ret; +} + +void dwc3_gadget_exit(struct dwc3 *dwc) +{ + int irq; + + usb_del_gadget_udc(&dwc->gadget); + irq = platform_get_irq(to_platform_device(dwc->dev), 0); + + dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); + free_irq(irq, dwc); + + dwc3_gadget_free_endpoints(dwc); + + dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, + dwc->ep0_bounce_addr); + + kfree(dwc->setup_buf); + + dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), + dwc->ep0_trb, dwc->ep0_trb_addr); + + dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), + dwc->ctrl_req, dwc->ctrl_req_addr); + + device_unregister(&dwc->gadget.dev); +} diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h new file mode 100644 index 00000000..a8600084 --- /dev/null +++ b/drivers/usb/dwc3/gadget.h @@ -0,0 +1,187 @@ +/** + * gadget.h - DesignWare USB3 DRD Gadget Header + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DRIVERS_USB_DWC3_GADGET_H +#define __DRIVERS_USB_DWC3_GADGET_H + +#include <linux/list.h> +#include <linux/usb/gadget.h> +#include "io.h" + +struct dwc3; +#define to_dwc3_ep(ep) (container_of(ep, struct dwc3_ep, endpoint)) +#define gadget_to_dwc(g) (container_of(g, struct dwc3, gadget)) + +/* DEPCFG parameter 1 */ +#define DWC3_DEPCFG_INT_NUM(n) ((n) << 0) +#define DWC3_DEPCFG_XFER_COMPLETE_EN (1 << 8) +#define DWC3_DEPCFG_XFER_IN_PROGRESS_EN (1 << 9) +#define DWC3_DEPCFG_XFER_NOT_READY_EN (1 << 10) +#define DWC3_DEPCFG_FIFO_ERROR_EN (1 << 11) +#define DWC3_DEPCFG_STREAM_EVENT_EN (1 << 13) +#define DWC3_DEPCFG_BINTERVAL_M1(n) ((n) << 16) +#define DWC3_DEPCFG_STREAM_CAPABLE (1 << 24) +#define DWC3_DEPCFG_EP_NUMBER(n) ((n) << 25) +#define DWC3_DEPCFG_BULK_BASED (1 << 30) +#define DWC3_DEPCFG_FIFO_BASED (1 << 31) + +/* DEPCFG parameter 0 */ +#define DWC3_DEPCFG_EP_TYPE(n) ((n) << 1) +#define DWC3_DEPCFG_MAX_PACKET_SIZE(n) ((n) << 3) +#define DWC3_DEPCFG_FIFO_NUMBER(n) ((n) << 17) +#define DWC3_DEPCFG_BURST_SIZE(n) ((n) << 22) +#define DWC3_DEPCFG_DATA_SEQ_NUM(n) ((n) << 26) +#define DWC3_DEPCFG_IGN_SEQ_NUM (1 << 31) + +/* DEPXFERCFG parameter 0 */ +#define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff) + +struct dwc3_gadget_ep_cmd_params { + u32 param2; + u32 param1; + u32 param0; +}; + +/* -------------------------------------------------------------------------- */ + +#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request)) + +static inline struct dwc3_request *next_request(struct list_head *list) +{ + if (list_empty(list)) + return NULL; + + return list_first_entry(list, struct dwc3_request, list); +} + +static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req) +{ + struct dwc3_ep *dep = req->dep; + + req->queued = true; + list_move_tail(&req->list, &dep->req_queued); +} + +void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, + int status); + +int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode); +int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state); + +void dwc3_ep0_interrupt(struct dwc3 *dwc, + const struct dwc3_event_depevt *event); +void dwc3_ep0_out_start(struct dwc3 *dwc); +int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, + gfp_t gfp_flags); +int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value); +int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, + unsigned cmd, struct dwc3_gadget_ep_cmd_params *params); + +/** + * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW + * @dwc: DesignWare USB3 Pointer + * @number: DWC endpoint number + * + * Caller should take care of locking + */ +static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3 *dwc, u8 number) +{ + u32 res_id; + + res_id = dwc3_readl(dwc->regs, DWC3_DEPCMD(number)); + + return DWC3_DEPCMD_GET_RSC_IDX(res_id); +} + +/** + * dwc3_gadget_event_string - returns event name + * @event: the event code + */ +static inline const char *dwc3_gadget_event_string(u8 event) +{ + switch (event) { + case DWC3_DEVICE_EVENT_DISCONNECT: + return "Disconnect"; + case DWC3_DEVICE_EVENT_RESET: + return "Reset"; + case DWC3_DEVICE_EVENT_CONNECT_DONE: + return "Connection Done"; + case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: + return "Link Status Change"; + case DWC3_DEVICE_EVENT_WAKEUP: + return "WakeUp"; + case DWC3_DEVICE_EVENT_EOPF: + return "End-Of-Frame"; + case DWC3_DEVICE_EVENT_SOF: + return "Start-Of-Frame"; + case DWC3_DEVICE_EVENT_ERRATIC_ERROR: + return "Erratic Error"; + case DWC3_DEVICE_EVENT_CMD_CMPL: + return "Command Complete"; + case DWC3_DEVICE_EVENT_OVERFLOW: + return "Overflow"; + } + + return "UNKNOWN"; +} + +/** + * dwc3_ep_event_string - returns event name + * @event: then event code + */ +static inline const char *dwc3_ep_event_string(u8 event) +{ + switch (event) { + case DWC3_DEPEVT_XFERCOMPLETE: + return "Transfer Complete"; + case DWC3_DEPEVT_XFERINPROGRESS: + return "Transfer In-Progress"; + case DWC3_DEPEVT_XFERNOTREADY: + return "Transfer Not Ready"; + case DWC3_DEPEVT_RXTXFIFOEVT: + return "FIFO"; + case DWC3_DEPEVT_STREAMEVT: + return "Stream"; + case DWC3_DEPEVT_EPCMDCMPLT: + return "Endpoint Command Complete"; + } + + return "UNKNOWN"; +} + +#endif /* __DRIVERS_USB_DWC3_GADGET_H */ diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c new file mode 100644 index 00000000..b108d18f --- /dev/null +++ b/drivers/usb/dwc3/host.c @@ -0,0 +1,102 @@ +/** + * host.c - DesignWare USB3 DRD Controller Host Glue + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/platform_device.h> + +#include "core.h" + +static struct resource generic_resources[] = { + { + .flags = IORESOURCE_IRQ, + }, + { + .flags = IORESOURCE_MEM, + }, +}; + +int dwc3_host_init(struct dwc3 *dwc) +{ + struct platform_device *xhci; + int ret; + + xhci = platform_device_alloc("xhci-hcd", -1); + if (!xhci) { + dev_err(dwc->dev, "couldn't allocate xHCI device\n"); + ret = -ENOMEM; + goto err0; + } + + dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask); + + xhci->dev.parent = dwc->dev; + xhci->dev.dma_mask = dwc->dev->dma_mask; + xhci->dev.dma_parms = dwc->dev->dma_parms; + + dwc->xhci = xhci; + + /* setup resources */ + generic_resources[0].start = dwc->irq; + + generic_resources[1].start = dwc->res->start; + generic_resources[1].end = dwc->res->start + 0x7fff; + + ret = platform_device_add_resources(xhci, generic_resources, + ARRAY_SIZE(generic_resources)); + if (ret) { + dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); + goto err1; + } + + ret = platform_device_add(xhci); + if (ret) { + dev_err(dwc->dev, "failed to register xHCI device\n"); + goto err1; + } + + return 0; + +err1: + platform_device_put(xhci); + +err0: + return ret; +} + +void dwc3_host_exit(struct dwc3 *dwc) +{ + platform_device_unregister(dwc->xhci); +} diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h new file mode 100644 index 00000000..071d561f --- /dev/null +++ b/drivers/usb/dwc3/io.h @@ -0,0 +1,54 @@ +/** + * io.h - DesignWare USB3 DRD IO Header + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DRIVERS_USB_DWC3_IO_H +#define __DRIVERS_USB_DWC3_IO_H + +#include <linux/io.h> + +static inline u32 dwc3_readl(void __iomem *base, u32 offset) +{ + return readl(base + offset); +} + +static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value) +{ + writel(value, base + offset); +} + +#endif /* __DRIVERS_USB_DWC3_IO_H */ |