diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/plat-omap/i2c.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/plat-omap/i2c.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/ANDROID_3.4.5/arch/arm/plat-omap/i2c.c b/ANDROID_3.4.5/arch/arm/plat-omap/i2c.c deleted file mode 100644 index db071bc7..00000000 --- a/ANDROID_3.4.5/arch/arm/plat-omap/i2c.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * linux/arch/arm/plat-omap/i2c.c - * - * Helper module for board specific I2C bus registration - * - * Copyright (C) 2007 Nokia Corporation. - * - * Contact: Jarkko Nikula <jhnikula@gmail.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/i2c.h> -#include <linux/i2c-omap.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/clk.h> - -#include <mach/irqs.h> -#include <plat/mux.h> -#include <plat/i2c.h> -#include <plat/omap-pm.h> -#include <plat/omap_device.h> - -#define OMAP_I2C_SIZE 0x3f -#define OMAP1_I2C_BASE 0xfffb3800 - -static const char name[] = "omap_i2c"; - -#define I2C_RESOURCE_BUILDER(base, irq) \ - { \ - .start = (base), \ - .end = (base) + OMAP_I2C_SIZE, \ - .flags = IORESOURCE_MEM, \ - }, \ - { \ - .start = (irq), \ - .flags = IORESOURCE_IRQ, \ - }, - -static struct resource i2c_resources[][2] = { - { I2C_RESOURCE_BUILDER(0, 0) }, -}; - -#define I2C_DEV_BUILDER(bus_id, res, data) \ - { \ - .id = (bus_id), \ - .name = name, \ - .num_resources = ARRAY_SIZE(res), \ - .resource = (res), \ - .dev = { \ - .platform_data = (data), \ - }, \ - } - -#define MAX_OMAP_I2C_HWMOD_NAME_LEN 16 -#define OMAP_I2C_MAX_CONTROLLERS 4 -static struct omap_i2c_bus_platform_data i2c_pdata[OMAP_I2C_MAX_CONTROLLERS]; -static struct platform_device omap_i2c_devices[] = { - I2C_DEV_BUILDER(1, i2c_resources[0], &i2c_pdata[0]), -}; - -#define OMAP_I2C_CMDLINE_SETUP (BIT(31)) - -static int __init omap_i2c_nr_ports(void) -{ - int ports = 0; - - if (cpu_class_is_omap1()) - ports = 1; - else if (cpu_is_omap24xx()) - ports = 2; - else if (cpu_is_omap34xx()) - ports = 3; - else if (cpu_is_omap44xx()) - ports = 4; - - return ports; -} - -static inline int omap1_i2c_add_bus(int bus_id) -{ - struct platform_device *pdev; - struct omap_i2c_bus_platform_data *pdata; - struct resource *res; - - omap1_i2c_mux_pins(bus_id); - - pdev = &omap_i2c_devices[bus_id - 1]; - res = pdev->resource; - res[0].start = OMAP1_I2C_BASE; - res[0].end = res[0].start + OMAP_I2C_SIZE; - res[1].start = INT_I2C; - pdata = &i2c_pdata[bus_id - 1]; - - /* all OMAP1 have IP version 1 register set */ - pdata->rev = OMAP_I2C_IP_VERSION_1; - - /* all OMAP1 I2C are implemented like this */ - pdata->flags = OMAP_I2C_FLAG_NO_FIFO | - OMAP_I2C_FLAG_SIMPLE_CLOCK | - OMAP_I2C_FLAG_16BIT_DATA_REG | - OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK; - - /* how the cpu bus is wired up differs for 7xx only */ - - if (cpu_is_omap7xx()) - pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1; - else - pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2; - - return platform_device_register(pdev); -} - - -#ifdef CONFIG_ARCH_OMAP2PLUS -/* - * XXX This function is a temporary compatibility wrapper - only - * needed until the I2C driver can be converted to call - * omap_pm_set_max_dev_wakeup_lat() and handle a return code. - */ -static void omap_pm_set_max_mpu_wakeup_lat_compat(struct device *dev, long t) -{ - omap_pm_set_max_mpu_wakeup_lat(dev, t); -} - -static inline int omap2_i2c_add_bus(int bus_id) -{ - int l; - struct omap_hwmod *oh; - struct platform_device *pdev; - char oh_name[MAX_OMAP_I2C_HWMOD_NAME_LEN]; - struct omap_i2c_bus_platform_data *pdata; - struct omap_i2c_dev_attr *dev_attr; - - omap2_i2c_mux_pins(bus_id); - - l = snprintf(oh_name, MAX_OMAP_I2C_HWMOD_NAME_LEN, "i2c%d", bus_id); - WARN(l >= MAX_OMAP_I2C_HWMOD_NAME_LEN, - "String buffer overflow in I2C%d device setup\n", bus_id); - oh = omap_hwmod_lookup(oh_name); - if (!oh) { - pr_err("Could not look up %s\n", oh_name); - return -EEXIST; - } - - pdata = &i2c_pdata[bus_id - 1]; - /* - * pass the hwmod class's CPU-specific knowledge of I2C IP revision in - * use, and functionality implementation flags, up to the OMAP I2C - * driver via platform data - */ - pdata->rev = oh->class->rev; - - dev_attr = (struct omap_i2c_dev_attr *)oh->dev_attr; - pdata->flags = dev_attr->flags; - - /* - * When waiting for completion of a i2c transfer, we need to - * set a wake up latency constraint for the MPU. This is to - * ensure quick enough wakeup from idle, when transfer - * completes. - * Only omap3 has support for constraints - */ - if (cpu_is_omap34xx()) - pdata->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat; - pdev = omap_device_build(name, bus_id, oh, pdata, - sizeof(struct omap_i2c_bus_platform_data), - NULL, 0, 0); - WARN(IS_ERR(pdev), "Could not build omap_device for %s\n", name); - - return PTR_RET(pdev); -} -#else -static inline int omap2_i2c_add_bus(int bus_id) -{ - return 0; -} -#endif - -static int __init omap_i2c_add_bus(int bus_id) -{ - if (cpu_class_is_omap1()) - return omap1_i2c_add_bus(bus_id); - else - return omap2_i2c_add_bus(bus_id); -} - -/** - * omap_i2c_bus_setup - Process command line options for the I2C bus speed - * @str: String of options - * - * This function allow to override the default I2C bus speed for given I2C - * bus with a command line option. - * - * Format: i2c_bus=bus_id,clkrate (in kHz) - * - * Returns 1 on success, 0 otherwise. - */ -static int __init omap_i2c_bus_setup(char *str) -{ - int ports; - int ints[3]; - - ports = omap_i2c_nr_ports(); - get_options(str, 3, ints); - if (ints[0] < 2 || ints[1] < 1 || ints[1] > ports) - return 0; - i2c_pdata[ints[1] - 1].clkrate = ints[2]; - i2c_pdata[ints[1] - 1].clkrate |= OMAP_I2C_CMDLINE_SETUP; - - return 1; -} -__setup("i2c_bus=", omap_i2c_bus_setup); - -/* - * Register busses defined in command line but that are not registered with - * omap_register_i2c_bus from board initialization code. - */ -static int __init omap_register_i2c_bus_cmdline(void) -{ - int i, err = 0; - - for (i = 0; i < ARRAY_SIZE(i2c_pdata); i++) - if (i2c_pdata[i].clkrate & OMAP_I2C_CMDLINE_SETUP) { - i2c_pdata[i].clkrate &= ~OMAP_I2C_CMDLINE_SETUP; - err = omap_i2c_add_bus(i + 1); - if (err) - goto out; - } - -out: - return err; -} -subsys_initcall(omap_register_i2c_bus_cmdline); - -/** - * omap_register_i2c_bus - register I2C bus with device descriptors - * @bus_id: bus id counting from number 1 - * @clkrate: clock rate of the bus in kHz - * @info: pointer into I2C device descriptor table or NULL - * @len: number of descriptors in the table - * - * Returns 0 on success or an error code. - */ -int __init omap_register_i2c_bus(int bus_id, u32 clkrate, - struct i2c_board_info const *info, - unsigned len) -{ - int err; - - BUG_ON(bus_id < 1 || bus_id > omap_i2c_nr_ports()); - - if (info) { - err = i2c_register_board_info(bus_id, info, len); - if (err) - return err; - } - - if (!i2c_pdata[bus_id - 1].clkrate) - i2c_pdata[bus_id - 1].clkrate = clkrate; - - i2c_pdata[bus_id - 1].clkrate &= ~OMAP_I2C_CMDLINE_SETUP; - - return omap_i2c_add_bus(bus_id); -} |