+++ /dev/null
-/*
- * 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>");
projects / openwrt / svn-archive / archive.git / blobdiff