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/*
* 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 <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/plat-s3c24xx/neo1973.h>
#ifdef CONFIG_MACH_NEO1973_GTA01
#include <asm/arch/gta01.h>
#include <linux/pcf50606.h>
#endif
#ifdef CONFIG_MACH_NEO1973_GTA02
#include <asm/arch/gta02.h>
#include <linux/pcf50633.h>
#endif
#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")) {
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
if (pcf50606_onoff_get(pcf50606_global,
PCF50606_REGULATOR_D1REG) &&
pcf50606_voltage_get(pcf50606_global,
PCF50606_REGULATOR_D1REG) == 3100)
goto out_1;
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN))
goto out_1;
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
}
} else if (!strcmp(attr->attr.name, "reset")) {
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
if (s3c2410_gpio_getpin(GTA01_GPIO_BT_EN) == 0)
goto out_1;
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN) == 0)
goto out_1;
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
}
}
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);
unsigned int vol;
if (!strcmp(attr->attr.name, "power_on")) {
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
/* if we are powering up, assert reset, then power,
* then release reset */
if (on) {
neo1973_gpb_setpin(GTA01_GPIO_BT_EN, 0);
pcf50606_voltage_set(pcf50606_global,
PCF50606_REGULATOR_D1REG,
3100);
}
pcf50606_onoff_set(pcf50606_global,
PCF50606_REGULATOR_D1REG, on);
neo1973_gpb_setpin(GTA01_GPIO_BT_EN, on);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
neo1973_gpb_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
if (on)
pcf50633_voltage_set(pcf50633_global,
PCF50633_REGULATOR_LDO4, 3200);
pcf50633_onoff_set(pcf50633_global,
PCF50633_REGULATOR_LDO4, on);
vol = pcf50633_voltage_get(pcf50633_global,
PCF50633_REGULATOR_LDO4);
dev_info(dev, "GTA02 Set PCF50633 LDO4 = %d\n", vol);
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
}
} else if (!strcmp(attr->attr.name, "reset")) {
/* reset is low-active, so we need to invert */
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
neo1973_gpb_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
neo1973_gpb_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
}
}
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");
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
/* 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 */
neo1973_gpb_setpin(GTA01_GPIO_BT_EN, 0);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
/* we make sure that the voltage is off */
pcf50633_onoff_set(pcf50633_global,
PCF50633_REGULATOR_LDO4, 0);
/* we pull reset to low to make sure that the chip doesn't
* drain power through the reset line */
neo1973_gpb_setpin(GTA02_GPIO_BT_EN, 0);
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
}
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);
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