diff options
author | mokopatches <mokopatches@openmoko.org> | 2008-11-19 17:03:10 +0000 |
---|---|---|
committer | warmcat <andy@warmcat.com> | 2008-11-19 17:03:10 +0000 |
commit | 2ddb75cf210a1258d30b3044f7675616a98573a1 (patch) | |
tree | 316f59aa596e8abbcb993baa856385b83000e44a /arch/arm/plat-s3c24xx/neo1973_pm_bt.c | |
parent | 3759ab50147a0b204bddfba6d6ccbd81b1e9c987 (diff) |
gta01-power_control.patch
[PATCH] Neo1973 GPS / GSM / Bluetooth power control via sysfs
Signed-off-by: Harald Welte <laforge@openmoko.org>
Diffstat (limited to 'arch/arm/plat-s3c24xx/neo1973_pm_bt.c')
-rw-r--r-- | arch/arm/plat-s3c24xx/neo1973_pm_bt.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_bt.c b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c new file mode 100644 index 00000000000..b1af441f7fa --- /dev/null +++ b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c @@ -0,0 +1,152 @@ +/* + * Bluetooth PM code for the FIC Neo1973 GSM Phone + * + * (C) 2007 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/platform_device.h> + +#include <linux/pcf50606.h> + +#include <asm/hardware.h> +#include <asm/arch/gta01.h> + +#define DRVMSG "FIC Neo1973 Bluetooth Power Management" + +static ssize_t bt_read(struct device *dev, struct device_attribute *attr, + char *buf) +{ + if (!strcmp(attr->attr.name, "power_on")) { + if (pcf50606_onoff_get(pcf50606_global, + PCF50606_REGULATOR_D1REG) && + pcf50606_voltage_get(pcf50606_global, + PCF50606_REGULATOR_D1REG) == 3100) + goto out_1; + } else if (!strcmp(attr->attr.name, "reset")) { + if (s3c2410_gpio_getpin(GTA01_GPIO_BT_EN) == 0) + goto out_1; + } + + return strlcpy(buf, "0\n", 3); +out_1: + return strlcpy(buf, "1\n", 3); +} + +static ssize_t bt_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")) { + /* if we are powering up, assert reset, then power, then + * release reset */ + if (on) { + s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0); + pcf50606_voltage_set(pcf50606_global, + PCF50606_REGULATOR_D1REG, + 3100); + } + pcf50606_onoff_set(pcf50606_global, + PCF50606_REGULATOR_D1REG, on); + s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on); + } else if (!strcmp(attr->attr.name, "reset")) { + /* reset is low-active, so we need to invert */ + s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1); + } + + return count; +} + +static DEVICE_ATTR(power_on, 0644, bt_read, bt_write); +static DEVICE_ATTR(reset, 0644, bt_read, bt_write); + +#ifdef CONFIG_PM +static int gta01_bt_suspend(struct platform_device *pdev, pm_message_t state) +{ + dev_dbg(&pdev->dev, DRVMSG ": suspending\n"); + /* FIXME: The PMU should save the PMU status, and the GPIO code should + * preserve the GPIO level, so there shouldn't be anything left to do + * for us, should there? */ + + return 0; +} + +static int gta01_bt_resume(struct platform_device *pdev) +{ + dev_dbg(&pdev->dev, DRVMSG ": resuming\n"); + + return 0; +} +#else +#define gta01_bt_suspend NULL +#define gta01_bt_resume NULL +#endif + +static struct attribute *gta01_bt_sysfs_entries[] = { + &dev_attr_power_on.attr, + &dev_attr_reset.attr, + NULL +}; + +static struct attribute_group gta01_bt_attr_group = { + .name = NULL, + .attrs = gta01_bt_sysfs_entries, +}; + +static int __init gta01_bt_probe(struct platform_device *pdev) +{ + dev_info(&pdev->dev, DRVMSG ": starting\n"); + + /* we make sure that the voltage is off */ + pcf50606_onoff_set(pcf50606_global, + PCF50606_REGULATOR_D1REG, 0); + /* we pull reset to low to make sure that the chip doesn't + * drain power through the reset line */ + s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0); + + return sysfs_create_group(&pdev->dev.kobj, >a01_bt_attr_group); +} + +static int gta01_bt_remove(struct platform_device *pdev) +{ + sysfs_remove_group(&pdev->dev.kobj, >a01_bt_attr_group); + + return 0; +} + +static struct platform_driver gta01_bt_driver = { + .probe = gta01_bt_probe, + .remove = gta01_bt_remove, + .suspend = gta01_bt_suspend, + .resume = gta01_bt_resume, + .driver = { + .name = "neo1973-pm-bt", + }, +}; + +static int __devinit gta01_bt_init(void) +{ + return platform_driver_register(>a01_bt_driver); +} + +static void gta01_bt_exit(void) +{ + platform_driver_unregister(>a01_bt_driver); +} + +module_init(gta01_bt_init); +module_exit(gta01_bt_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); +MODULE_DESCRIPTION(DRVMSG); |