diff options
Diffstat (limited to 'drivers/usb/host/ohci-au1xxx.c')
| -rw-r--r-- | drivers/usb/host/ohci-au1xxx.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-au1xxx.c b/drivers/usb/host/ohci-au1xxx.c new file mode 100644 index 00000000..4ea63b2c --- /dev/null +++ b/drivers/usb/host/ohci-au1xxx.c @@ -0,0 +1,233 @@ +/* + * OHCI HCD (Host Controller Driver) for USB. + * + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * + * Bus Glue for AMD Alchemy Au1xxx + * + * Written by Christopher Hoover <ch@hpl.hp.com> + * Based on fragments of previous driver by Russell King et al. + * + * Modified for LH7A404 from ohci-sa1111.c + * by Durgesh Pattamatta <pattamattad@sharpsec.com> + * Modified for AMD Alchemy Au1xxx + * by Matt Porter <mporter@kernel.crashing.org> + * + * This file is licenced under the GPL. + */ + +#include <linux/platform_device.h> +#include <linux/signal.h> + +#include <asm/mach-au1x00/au1000.h> + + +extern int usb_disabled(void); + +static int __devinit ohci_au1xxx_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + ohci_dbg(ohci, "ohci_au1xxx_start, ohci:%p", ohci); + + if ((ret = ohci_init(ohci)) < 0) + return ret; + + if ((ret = ohci_run(ohci)) < 0) { + err ("can't start %s", hcd->self.bus_name); + ohci_stop(hcd); + return ret; + } + + return 0; +} + +static const struct hc_driver ohci_au1xxx_hc_driver = { + .description = hcd_name, + .product_desc = "Au1xxx OHCI", + .hcd_priv_size = sizeof(struct ohci_hcd), + + /* + * generic hardware linkage + */ + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = ohci_au1xxx_start, + .stop = ohci_stop, + .shutdown = ohci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ohci_urb_enqueue, + .urb_dequeue = ohci_urb_dequeue, + .endpoint_disable = ohci_endpoint_disable, + + /* + * scheduling support + */ + .get_frame_number = ohci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ohci_hub_status_data, + .hub_control = ohci_hub_control, +#ifdef CONFIG_PM + .bus_suspend = ohci_bus_suspend, + .bus_resume = ohci_bus_resume, +#endif + .start_port_reset = ohci_start_port_reset, +}; + +static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev) +{ + int ret, unit; + struct usb_hcd *hcd; + + if (usb_disabled()) + return -ENODEV; + + if (pdev->resource[1].flags != IORESOURCE_IRQ) { + pr_debug("resource[1] is not IORESOURCE_IRQ\n"); + return -ENOMEM; + } + + hcd = usb_create_hcd(&ohci_au1xxx_hc_driver, &pdev->dev, "au1xxx"); + if (!hcd) + return -ENOMEM; + + hcd->rsrc_start = pdev->resource[0].start; + hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + pr_debug("request_mem_region failed\n"); + ret = -EBUSY; + goto err1; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + pr_debug("ioremap failed\n"); + ret = -ENOMEM; + goto err2; + } + + unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ? + ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0; + if (alchemy_usb_control(unit, 1)) { + printk(KERN_INFO "%s: controller init failed!\n", pdev->name); + ret = -ENODEV; + goto err3; + } + + ohci_hcd_init(hcd_to_ohci(hcd)); + + ret = usb_add_hcd(hcd, pdev->resource[1].start, + IRQF_SHARED); + if (ret == 0) { + platform_set_drvdata(pdev, hcd); + return ret; + } + + alchemy_usb_control(unit, 0); +err3: + iounmap(hcd->regs); +err2: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err1: + usb_put_hcd(hcd); + return ret; +} + +static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + int unit; + + unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ? + ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0; + usb_remove_hcd(hcd); + alchemy_usb_control(unit, 0); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int ohci_hcd_au1xxx_drv_suspend(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + unsigned long flags; + int rc; + + rc = 0; + + /* Root hub was already suspended. Disable irq emission and + * mark HW unaccessible, bail out if RH has been resumed. Use + * the spinlock to properly synchronize with possible pending + * RH suspend or resume activity. + */ + spin_lock_irqsave(&ohci->lock, flags); + if (ohci->rh_state != OHCI_RH_SUSPENDED) { + rc = -EINVAL; + goto bail; + } + ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); + (void)ohci_readl(ohci, &ohci->regs->intrdisable); + + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + alchemy_usb_control(ALCHEMY_USB_OHCI0, 0); +bail: + spin_unlock_irqrestore(&ohci->lock, flags); + + return rc; +} + +static int ohci_hcd_au1xxx_drv_resume(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + + alchemy_usb_control(ALCHEMY_USB_OHCI0, 1); + + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + ohci_finish_controller_resume(hcd); + + return 0; +} + +static const struct dev_pm_ops au1xxx_ohci_pmops = { + .suspend = ohci_hcd_au1xxx_drv_suspend, + .resume = ohci_hcd_au1xxx_drv_resume, +}; + +#define AU1XXX_OHCI_PMOPS &au1xxx_ohci_pmops + +#else +#define AU1XXX_OHCI_PMOPS NULL +#endif + +static struct platform_driver ohci_hcd_au1xxx_driver = { + .probe = ohci_hcd_au1xxx_drv_probe, + .remove = ohci_hcd_au1xxx_drv_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "au1xxx-ohci", + .owner = THIS_MODULE, + .pm = AU1XXX_OHCI_PMOPS, + }, +}; + +MODULE_ALIAS("platform:au1xxx-ohci"); |