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/*
* Support for features of Openmoko GTA03
*
* (C) 2008 by Openmoko Inc.
* Author: Andy Green <andy@openmoko.com>
* All rights reserved.
*
* Somewhat based on the GTA01 / 02 neo1973_pm_ stuff mainly by Harald Welte
*
* 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/om-gta03.h>
#include <asm/mach-types.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/gpio.h>
#include <plat/gpio-cfg.h>
struct om_gta03_features_data {
int gps_power_was_on;
struct regulator *gps_regulator;
int wlan_bt_power_was_on;
int gsm_power_was_on;
int usbhost_power_was_on;
};
static struct om_gta03_features_data om_gta03_features;
/* GPS power */
static void om_gta03_gps_pwron_set(int on)
{
if ((on) && (!om_gta03_features.gps_power_was_on)) {
regulator_enable(om_gta03_features.gps_regulator);
/* enable LNA */
gpio_direction_output(GTA03_GPIO_GPS_LNA_EN, 1);
}
if ((!on) && (om_gta03_features.gps_power_was_on)) {
/* disable LNA */
gpio_direction_output(GTA03_GPIO_GPS_LNA_EN, 0);
regulator_disable(om_gta03_features.gps_regulator);
}
}
static ssize_t om_gta03_gps_power_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (regulator_is_enabled(om_gta03_features.gps_regulator))
return strlcpy(buf, "1\n", 3);
else
return strlcpy(buf, "0\n", 3);
}
static ssize_t om_gta03_gps_power_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int on = !!simple_strtoul(buf, NULL, 10);
om_gta03_gps_pwron_set(on);
om_gta03_features.gps_power_was_on = on;
return count;
}
static DEVICE_ATTR(gps_power, 0644, om_gta03_gps_power_read,
om_gta03_gps_power_write);
/* WLAN / BT power */
static void om_gta03_wlan_bt_pwron_set(int on)
{
if (!on) {
/* remove power from WLAN / BT module */
gpio_direction_output(GTA03_GPIO_NWLAN_POWER, 1);
s3c_gpio_setpull(GTA03_GPIO_NWLAN_POWER, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_NWLAN_POWER, S3C_GPIO_SFN(1));
return;
}
/* give power to WLAN / BT module */
s3c_gpio_setpull(GTA03_GPIO_WLAN_RESET, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_WLAN_RESET, S3C_GPIO_SFN(1));
gpio_direction_output(GTA03_GPIO_WLAN_RESET, 0);
gpio_direction_output(GTA03_GPIO_NWLAN_POWER, 0);
s3c_gpio_setpull(GTA03_GPIO_NWLAN_POWER, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_NWLAN_POWER, S3C_GPIO_SFN(1));
msleep(1);
gpio_direction_output(GTA03_GPIO_WLAN_RESET, 1);
}
static ssize_t om_gta03_wlan_bt_power_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (om_gta03_features.wlan_bt_power_was_on)
return strlcpy(buf, "1\n", 3);
else
return strlcpy(buf, "0\n", 3);
}
static ssize_t om_gta03_wlan_bt_power_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
om_gta03_wlan_bt_pwron_set(simple_strtoul(buf, NULL, 10));
return count;
}
static DEVICE_ATTR(wlan_bt_power, 0644, om_gta03_wlan_bt_power_read,
om_gta03_wlan_bt_power_write);
/* GSM Module on / off */
static void om_gta03_gsm_pwron_set(int on)
{
if (!on) {
/* remove power from WLAN / BT module */
gpio_direction_output(GTA03_GPIO_MODEN_ON, 0);
s3c_gpio_setpull(GTA03_GPIO_MODEN_ON, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_MODEN_ON, S3C_GPIO_SFN(1));
return;
}
/* give power to GSM module */
s3c_gpio_setpull(GTA03_GPIO_N_MODEM_RESET, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_N_MODEM_RESET, S3C_GPIO_SFN(1));
gpio_direction_output(GTA03_GPIO_N_MODEM_RESET, 0);
gpio_direction_output(GTA03_GPIO_MODEN_ON, 1);
s3c_gpio_setpull(GTA03_GPIO_MODEN_ON, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GTA03_GPIO_MODEN_ON, S3C_GPIO_SFN(1));
msleep(1);
gpio_direction_output(GTA03_GPIO_N_MODEM_RESET, 1);
}
static ssize_t om_gta03_gsm_power_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (om_gta03_features.gsm_power_was_on)
return strlcpy(buf, "1\n", 3);
else
return strlcpy(buf, "0\n", 3);
}
static ssize_t om_gta03_gsm_power_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int on = !!simple_strtoul(buf, NULL, 10);
om_gta03_gsm_pwron_set(on);
om_gta03_features.gsm_power_was_on = on;
return count;
}
static DEVICE_ATTR(gsm_power, 0644, om_gta03_gsm_power_read,
om_gta03_gsm_power_write);
/* USB host power on / off */
static void om_gta03_usbhost_pwron_set(int on)
{
pcf50633_gpio_set(om_gta03_pcf_pdata.pcf, PCF50633_GPO, on);
}
static ssize_t om_gta03_usbhost_power_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (pcf50633_gpio_get(om_gta03_pcf_pdata.pcf, PCF50633_GPO))
return strlcpy(buf, "1\n", 3);
else
return strlcpy(buf, "0\n", 3);
}
static ssize_t om_gta03_usbhost_power_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int on = !!simple_strtoul(buf, NULL, 10);
om_gta03_usbhost_pwron_set(on);
om_gta03_features.usbhost_power_was_on = on;
return count;
}
static DEVICE_ATTR(usbhost_power, 0644, om_gta03_usbhost_power_read,
om_gta03_usbhost_power_write);
static struct attribute *om_gta03_features_sysfs_entries[] = {
&dev_attr_gps_power.attr,
&dev_attr_wlan_bt_power.attr,
&dev_attr_gsm_power.attr,
&dev_attr_usbhost_power.attr,
NULL
};
static struct attribute_group om_gta03_features_attr_group = {
.name = NULL,
.attrs = om_gta03_features_sysfs_entries,
};
static int __init om_gta03_features_probe(struct platform_device *pdev)
{
om_gta03_features.gps_regulator = regulator_get(&pdev->dev, "RF_3V");
dev_info(&pdev->dev, "starting\n");
om_gta03_features.wlan_bt_power_was_on = 1; /* defaults to on */
return sysfs_create_group(&pdev->dev.kobj, &om_gta03_features_attr_group);
}
static int om_gta03_features_remove(struct platform_device *pdev)
{
regulator_put(om_gta03_features.gps_regulator);
sysfs_remove_group(&pdev->dev.kobj, &om_gta03_features_attr_group);
return 0;
}
#ifdef CONFIG_PM
static int om_gta03_features_suspend(struct platform_device *pdev,
pm_message_t state)
{
om_gta03_gps_pwron_set(0);
om_gta03_wlan_bt_pwron_set(0);
om_gta03_usbhost_pwron_set(0);
return 0;
}
static int om_gta03_features_resume(struct platform_device *pdev)
{
if (om_gta03_features.gps_power_was_on)
om_gta03_gps_pwron_set(1);
if (om_gta03_features.wlan_bt_power_was_on)
om_gta03_wlan_bt_pwron_set(1);
if (om_gta03_features.usbhost_power_was_on)
om_gta03_usbhost_pwron_set(1);
return 0;
}
#else
#define om_gta03_features_suspend NULL
#define om_gta03_features_resume NULL
#endif
static struct platform_driver om_gta03_features_driver = {
.probe = om_gta03_features_probe,
.remove = om_gta03_features_remove,
.suspend = om_gta03_features_suspend,
.resume = om_gta03_features_resume,
.driver = {
.name = "om-gta03",
},
};
static int __devinit om_gta03_features_init(void)
{
return platform_driver_register(&om_gta03_features_driver);
}
static void om_gta03_features_exit(void)
{
platform_driver_unregister(&om_gta03_features_driver);
}
module_init(om_gta03_features_init);
module_exit(om_gta03_features_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
MODULE_DESCRIPTION("Openmoko GTA03 Feature Driver");
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