diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.31/arch/arm/mach-s3c2442/gta02-pm-gps.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.31/arch/arm/mach-s3c2442/gta02-pm-gps.c | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/target/linux/s3c24xx/files-2.6.31/arch/arm/mach-s3c2442/gta02-pm-gps.c b/target/linux/s3c24xx/files-2.6.31/arch/arm/mach-s3c2442/gta02-pm-gps.c deleted file mode 100644 index f617d73f30..0000000000 --- a/target/linux/s3c24xx/files-2.6.31/arch/arm/mach-s3c2442/gta02-pm-gps.c +++ /dev/null @@ -1,243 +0,0 @@ -/* - * GPS Power Management code for the Openmoko Freerunner GSM Phone - * - * (C) 2007-2009 by Openmoko Inc. - * Author: Harald Welte <laforge@openmoko.org> - * All rights reserved. - * - * 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 - * - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/platform_device.h> - -#include <mach/hardware.h> -#include <mach/gpio-fns.h> -#include <mach/cpu.h> - -#include <asm/mach-types.h> - -#include <mach/gta02.h> -#include <linux/mfd/pcf50633/core.h> -#include <linux/mfd/pcf50633/pmic.h> - -#include <linux/regulator/consumer.h> -#include <linux/err.h> - -struct gta02_pm_gps_data { -#ifdef CONFIG_PM - int keep_on_in_suspend; -#endif - int power_was_on; - struct regulator *regulator; -}; - -static struct gta02_pm_gps_data gta02_gps; - -int gta02_pm_gps_is_on(void) -{ - return gta02_gps.power_was_on; -} -EXPORT_SYMBOL_GPL(gta02_pm_gps_is_on); - -/* This is the POWERON pin */ -static void gps_pwron_set(int on) -{ - if (on) { - /* return UART pins to being UART pins */ - s3c2410_gpio_cfgpin(S3C2410_GPH(4), S3C2410_GPH4_TXD1); - /* remove pulldown now it won't be floating any more */ - s3c2410_gpio_pullup(S3C2410_GPH(5), 0); - - if (!gta02_gps.power_was_on) - regulator_enable(gta02_gps.regulator); - } else { - /* - * take care not to power unpowered GPS from UART TX - * return them to GPIO and force low - */ - s3c2410_gpio_cfgpin(S3C2410_GPH(4), S3C2410_GPIO_OUTPUT); - s3c2410_gpio_setpin(S3C2410_GPH(4), 0); - /* don't let RX from unpowered GPS float */ - s3c2410_gpio_pullup(S3C2410_GPH(5), 1); - if (gta02_gps.power_was_on) - regulator_disable(gta02_gps.regulator); - } -} - -static int gps_pwron_get(void) -{ - return regulator_is_enabled(gta02_gps.regulator); -} - -#ifdef CONFIG_PM -/* This is the flag for keeping gps ON during suspend */ -static void gps_keep_on_in_suspend_set(int on) -{ - gta02_gps.keep_on_in_suspend = on; -} - -static int gps_keep_on_in_suspend_get(void) -{ - return gta02_gps.keep_on_in_suspend; -} -#endif - -static ssize_t power_gps_read(struct device *dev, - struct device_attribute *attr, char *buf) -{ - int ret = 0; - - if (!strcmp(attr->attr.name, "power_on") || - !strcmp(attr->attr.name, "pwron")) { - ret = gps_pwron_get(); -#ifdef CONFIG_PM - } else if (!strcmp(attr->attr.name, "keep_on_in_suspend")) { - ret = gps_keep_on_in_suspend_get(); -#endif - } - if (ret) - return strlcpy(buf, "1\n", 3); - else - return strlcpy(buf, "0\n", 3); -} - -static ssize_t power_gps_write(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t count) -{ - unsigned long on = simple_strtoul(buf, NULL, 10); - - if (!strcmp(attr->attr.name, "power_on") || - !strcmp(attr->attr.name, "pwron")) { - gps_pwron_set(on); - gta02_gps.power_was_on = !!on; -#ifdef CONFIG_PM - } else if (!strcmp(attr->attr.name, "keep_on_in_suspend")) { - gps_keep_on_in_suspend_set(on); -#endif - } - return count; -} - -#ifdef CONFIG_PM -static int gta02_pm_gps_suspend(struct platform_device *pdev, - pm_message_t state) -{ - if (!gta02_gps.keep_on_in_suspend || - !gta02_gps.power_was_on) - gps_pwron_set(0); - else - dev_warn(&pdev->dev, "GTA02: keeping gps ON " - "during suspend\n"); - return 0; -} - -static int gta02_pm_gps_resume(struct platform_device *pdev) -{ - if (!gta02_gps.keep_on_in_suspend && gta02_gps.power_was_on) - gps_pwron_set(1); - - return 0; -} - -static DEVICE_ATTR(keep_on_in_suspend, 0644, power_gps_read, power_gps_write); -#else -#define gta02_pm_gps_suspend NULL -#define gta02_pm_gps_resume NULL -#endif - -static DEVICE_ATTR(power_on, 0644, power_gps_read, power_gps_write); - -static struct attribute *gta02_gps_sysfs_entries[] = { - &dev_attr_power_on.attr, -#ifdef CONFIG_PM - &dev_attr_keep_on_in_suspend.attr, -#endif - NULL -}; - -static struct attribute_group gta02_gps_attr_group = { - .name = NULL, - .attrs = gta02_gps_sysfs_entries, -}; - -static int __init gta02_pm_gps_probe(struct platform_device *pdev) -{ - gta02_gps.regulator = regulator_get(&pdev->dev, "RF_3V"); - if (IS_ERR(gta02_gps.regulator)) { - dev_err(&pdev->dev, "probe failed %ld\n", - PTR_ERR(gta02_gps.regulator)); - - return PTR_ERR(gta02_gps.regulator); - } - - dev_info(&pdev->dev, "starting\n"); - - /* - * Here we should call the code that handles the set GPS power - * off action. But, the regulator API does not allow us to - * reassert regulator state, and when we read the regulator API - * logical state, it can differ from the actual state, So - * a workaround for this is to just set the regulator off in the - * PMU directly. Because that's different from normal flow, we - * have to reproduce other things from the OFF action here too. - */ - - /* - * u-boot enables LDO5 (GPS), which doesn't make sense and - * causes confusion. We therefore disable the regulator here. - */ - pcf50633_reg_write(gta02_pcf, PCF50633_REG_LDO5ENA, 0); - - /* - * take care not to power unpowered GPS from UART TX - * return them to GPIO and force low - */ - s3c2410_gpio_cfgpin(S3C2410_GPH(4), S3C2410_GPIO_OUTPUT); - s3c2410_gpio_setpin(S3C2410_GPH(4), 0); - /* don't let RX from unpowered GPS float */ - s3c2410_gpio_pullup(S3C2410_GPH(5), 1); - - return sysfs_create_group(&pdev->dev.kobj, - >a02_gps_attr_group); -} - -static int gta02_pm_gps_remove(struct platform_device *pdev) -{ - regulator_put(gta02_gps.regulator); - sysfs_remove_group(&pdev->dev.kobj, >a02_gps_attr_group); - return 0; -} - -static struct platform_driver gta02_pm_gps_driver = { - .probe = gta02_pm_gps_probe, - .remove = gta02_pm_gps_remove, - .suspend = gta02_pm_gps_suspend, - .resume = gta02_pm_gps_resume, - .driver = { - .name = "gta02-pm-gps", - }, -}; - -static int __devinit gta02_pm_gps_init(void) -{ - return platform_driver_register(>a02_pm_gps_driver); -} - -static void gta02_pm_gps_exit(void) -{ - platform_driver_unregister(>a02_pm_gps_driver); -} - -module_init(gta02_pm_gps_init); -module_exit(gta02_pm_gps_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); |