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/*
* Support for features of Openmoko 3D7K
*
* (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-3d7k.h>
#include <asm/mach-types.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/gpio.h>
#include <linux/mmc/host.h>
#include <plat/sdhci.h>
#include <plat/devs.h>
#include <plat/gpio-cfg.h>
enum feature {
OM_3D7K_GSM, /* GSM module */
OM_3D7K_USBHOST, /* USB Host power generation */
OM_3D7K_VIB, /* Vibrator */
OM_3D7K_FEATURE_COUNT /* always last */
};
struct om_3d7k_feature_info {
const char * name;
int depower_on_suspend;
int on;
};
static struct om_3d7k_feature_info feature_info[OM_3D7K_FEATURE_COUNT] = {
[OM_3D7K_GSM] = { "gsm_power", 0, 0 },
[OM_3D7K_USBHOST] = { "usbhost_power", 1, 0 },
[OM_3D7K_VIB] = { "vibrator_power", 1, 0 },
};
static struct regulator *gps_regulator;
static void om_3d7k_features_pwron_set_on(enum feature feature)
{
switch (feature) {
case OM_3D7K_GSM:
/* give power to GSM module */
s3c_gpio_setpull(OM_3D7K_GPIO_N_MODEM_RESET, S3C_GPIO_PULL_NONE);
s3c_gpio_setpull(OM_3D7K_GPIO_MODEM_ON, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(OM_3D7K_GPIO_N_MODEM_RESET, S3C_GPIO_SFN(1));
s3c_gpio_cfgpin(OM_3D7K_GPIO_MODEM_ON, S3C_GPIO_SFN(1));
gpio_direction_output(OM_3D7K_GPIO_N_MODEM_RESET, 0);
gpio_direction_output(OM_3D7K_GPIO_MODEM_ON, 1);
msleep(10);
gpio_direction_output(OM_3D7K_GPIO_MODEM_ON, 0);
msleep(150);
gpio_direction_output(OM_3D7K_GPIO_N_MODEM_RESET, 1);
msleep(300);
gpio_direction_output(OM_3D7K_GPIO_MODEM_ON, 1);
break;
case OM_3D7K_USBHOST:
pcf50633_gpio_set(om_3d7k_pcf, PCF50633_GPO, 1);
break;
case OM_3D7K_VIB:
gpio_direction_output(OM_3D7K_GPIO_VIBRATOR_ON, 1);
break;
default:
break;
}
}
static void om_3d7k_features_pwron_set_off(enum feature feature)
{
switch (feature) {
case OM_3D7K_GSM:
/* remove power from WLAN / BT module */
s3c_gpio_cfgpin(OM_3D7K_GPIO_MODEM_ON, S3C_GPIO_SFN(1));
gpio_direction_output(OM_3D7K_GPIO_MODEM_ON, 0);
msleep(1100);
gpio_direction_output(OM_3D7K_GPIO_MODEM_ON, 1);
break;
case OM_3D7K_USBHOST:
pcf50633_gpio_set(om_3d7k_pcf, PCF50633_GPO, 0);
break;
case OM_3D7K_VIB:
gpio_direction_output(OM_3D7K_GPIO_VIBRATOR_ON, 0);
break;
default:
break;
}
}
static void om_3d7k_features_pwron_set(enum feature feature, int on)
{
if ((on) && (!feature_info[feature].on))
om_3d7k_features_pwron_set_on(feature);
else
if ((!on) && (feature_info[feature].on))
om_3d7k_features_pwron_set_off(feature);
}
static ssize_t om_3d7k_feature_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
int on;
int feature = 0;
int hit = 0;
while (!hit && feature < OM_3D7K_FEATURE_COUNT) {
if (!strcmp(attr->attr.name, feature_info[feature].name))
hit = 1;
else
feature++;
}
if (!hit)
return -EINVAL;
switch (feature) {
case OM_3D7K_USBHOST:
on = pcf50633_gpio_get(om_3d7k_pcf, PCF50633_GPO);
break;
default:
on = feature_info[feature].on;
}
*buf++ = '0' + on;
*buf++='\n';
*buf = '\0';
return 3;
}
static ssize_t om_3d7k_feature_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int on = !!simple_strtoul(buf, NULL, 10);
int feature = 0;
int hit = 0;
while (!hit && feature < OM_3D7K_FEATURE_COUNT) {
if (!strcmp(attr->attr.name, feature_info[feature].name))
hit = 1;
else
feature++;
}
if (!hit)
return -EINVAL;
om_3d7k_features_pwron_set(feature, on);
feature_info[feature].on = on;
return count;
}
static DEVICE_ATTR(gsm_power, 0644, om_3d7k_feature_read,
om_3d7k_feature_write);
static DEVICE_ATTR(usbhost_power, 0644, om_3d7k_feature_read,
om_3d7k_feature_write);
static DEVICE_ATTR(vibrator_power, 0644, om_3d7k_feature_read,
om_3d7k_feature_write);
static struct attribute *om_3d7k_features_sysfs_entries[] = {
&dev_attr_gsm_power.attr,
&dev_attr_usbhost_power.attr,
&dev_attr_vibrator_power.attr,
NULL
};
static struct attribute_group om_3d7k_features_attr_group = {
.name = NULL,
.attrs = om_3d7k_features_sysfs_entries,
};
static int __init om_3d7k_features_probe(struct platform_device *pdev)
{
gps_regulator = regulator_get(&pdev->dev, "RF_3V");
dev_info(&pdev->dev, "starting\n");
return sysfs_create_group(&pdev->dev.kobj,
&om_3d7k_features_attr_group);
}
static int om_3d7k_features_remove(struct platform_device *pdev)
{
regulator_put(gps_regulator);
sysfs_remove_group(&pdev->dev.kobj, &om_3d7k_features_attr_group);
return 0;
}
#ifdef CONFIG_PM
static int om_3d7k_features_suspend(struct platform_device *pdev,
pm_message_t state)
{
int feature;
for (feature = 0; feature < OM_3D7K_FEATURE_COUNT; feature++)
if (feature_info[feature].depower_on_suspend)
om_3d7k_features_pwron_set_off(feature);
return 0;
}
static int om_3d7k_features_resume(struct platform_device *pdev)
{
int feature;
for (feature = 0; feature < OM_3D7K_FEATURE_COUNT; feature++)
if (feature_info[feature].depower_on_suspend)
if (feature_info[feature].on)
om_3d7k_features_pwron_set_on(feature);
return 0;
}
#else
#define om_3d7k_features_suspend NULL
#define om_3d7k_features_resume NULL
#endif
static struct platform_driver om_3d7k_features_driver = {
.probe = om_3d7k_features_probe,
.remove = om_3d7k_features_remove,
.suspend = om_3d7k_features_suspend,
.resume = om_3d7k_features_resume,
.driver = {
.name = "om-3d7k",
},
};
static int __devinit om_3d7k_features_init(void)
{
return platform_driver_register(&om_3d7k_features_driver);
}
static void om_3d7k_features_exit(void)
{
platform_driver_unregister(&om_3d7k_features_driver);
}
module_init(om_3d7k_features_init);
module_exit(om_3d7k_features_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
MODULE_DESCRIPTION("Openmoko OM_3D7K Feature Driver");
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