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|
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/semaphore.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <plat/gpio-cfg.h>
#include <mach/gpio.h>
#include <mach/usb_switch.h>
struct device *sec_switch_dev;
enum usb_path_t current_path = USB_PATH_NONE;
static struct semaphore usb_switch_sem;
static bool usb_connected;
static ssize_t show_usb_sel(struct device *dev,
struct device_attribute *attr, char *buf)
{
const char *mode;
if (current_path & USB_PATH_CP) {
/* CP */
mode = "MODEM";
} else {
/* AP */
mode = "PDA";
}
pr_info("%s: %s\n", __func__, mode);
return sprintf(buf, "%s\n", mode);
}
static ssize_t store_usb_sel(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
pr_info("%s: %s\n", __func__, buf);
if (!strncasecmp(buf, "PDA", 3)) {
usb_switch_lock();
usb_switch_clr_path(USB_PATH_CP);
usb_switch_unlock();
} else if (!strncasecmp(buf, "MODEM", 5)) {
usb_switch_lock();
usb_switch_set_path(USB_PATH_CP);
usb_switch_unlock();
} else {
pr_err("%s: wrong usb_sel value(%s)!!\n", __func__, buf);
return -EINVAL;
}
return count;
}
static ssize_t show_uart_sel(struct device *dev,
struct device_attribute *attr, char *buf)
{
int val_sel;
const char *mode;
val_sel = gpio_get_value(GPIO_UART_SEL);
if (val_sel == 0) {
/* CP */
mode = "CP";
} else {
/* AP */
mode = "AP";
}
pr_info("%s: %s\n", __func__, mode);
return sprintf(buf, "%s\n", mode);
}
static ssize_t store_uart_sel(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int uart_sel = -1;
pr_info("%s: %s\n", __func__, buf);
if (!strncasecmp(buf, "AP", 2)) {
uart_sel = 1;
} else if (!strncasecmp(buf, "CP", 2)) {
uart_sel = 0;
} else {
pr_err("%s: wrong uart_sel value(%s)!!\n", __func__, buf);
return -EINVAL;
}
/* 1 for AP, 0 for CP */
gpio_set_value(GPIO_UART_SEL, uart_sel);
return count;
}
static ssize_t show_usb_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
const char *state;
if (usb_connected)
state = "USB_STATE_CONFIGURED";
else
state = "USB_STATE_NOTCONFIGURED";
pr_info("%s: %s\n", __func__, state);
return sprintf(buf, "%s\n", state);
}
static DEVICE_ATTR(usb_sel, 0664, show_usb_sel, store_usb_sel);
static DEVICE_ATTR(uart_sel, 0664, show_uart_sel, store_uart_sel);
static DEVICE_ATTR(usb_state, S_IRUGO, show_usb_state, NULL);
static struct attribute *px_switch_attributes[] = {
&dev_attr_usb_sel.attr,
&dev_attr_uart_sel.attr,
&dev_attr_usb_state.attr,
NULL
};
static const struct attribute_group px_switch_group = {
.attrs = px_switch_attributes,
};
void set_usb_connection_state(bool connected)
{
pr_info("%s: set %s\n", __func__, (connected ? "True" : "False"));
if (usb_connected != connected) {
usb_connected = connected;
pr_info("%s: send \"usb_state\" sysfs_notify\n", __func__);
sysfs_notify(&sec_switch_dev->kobj, NULL, "usb_state");
}
}
static void pmic_safeout2(int onoff)
{
#if !defined(CONFIG_MACH_P4NOTE)
struct regulator *regulator;
regulator = regulator_get(NULL, "safeout2");
BUG_ON(IS_ERR_OR_NULL(regulator));
if (onoff) {
if (!regulator_is_enabled(regulator)) {
regulator_enable(regulator);
} else {
pr_info("%s: onoff:%d No change in safeout2\n",
__func__, onoff);
}
} else {
if (regulator_is_enabled(regulator)) {
regulator_force_disable(regulator);
} else {
pr_info("%s: onoff:%d No change in safeout2\n",
__func__, onoff);
}
}
regulator_put(regulator);
#else
if (onoff) {
if (!gpio_get_value(GPIO_USB_SEL_CP)) {
gpio_set_value(GPIO_USB_SEL_CP, onoff);
} else {
pr_info("%s: onoff:%d No change in safeout2\n",
__func__, onoff);
}
} else {
if (gpio_get_value(GPIO_USB_SEL_CP)) {
gpio_set_value(GPIO_USB_SEL_CP, onoff);
} else {
pr_info("%s: onoff:%d No change in safeout2\n",
__func__, onoff);
}
}
#endif
}
static void usb_apply_path(enum usb_path_t path)
{
#if defined(CONFIG_MACH_P4NOTE)
pr_info("%s: current gpio before changing : sel0:%d sel1:%d sel_cp:%d\n",
__func__, gpio_get_value(GPIO_USB_SEL0),
gpio_get_value(GPIO_USB_SEL1), gpio_get_value(GPIO_USB_SEL_CP));
pr_info("%s: target path %x\n", __func__, path);
#else
pr_info("%s: current gpio before changing : sel1:%d sel2:%d sel3:%d\n",
__func__, gpio_get_value(GPIO_USB_SEL1),
gpio_get_value(GPIO_USB_SEL2), gpio_get_value(GPIO_USB_SEL3));
pr_info("%s: target path %x\n", __func__, path);
#endif
/* following checks are ordered according to priority */
if (path & USB_PATH_ADCCHECK) {
#if defined(CONFIG_MACH_P4NOTE)
gpio_set_value(GPIO_USB_SEL0, 1);
gpio_set_value(GPIO_USB_SEL1, 0);
#else
gpio_set_value(GPIO_USB_SEL1, 0);
gpio_set_value(GPIO_USB_SEL2, 1);
gpio_set_value(GPIO_USB_SEL3, 1);
#endif
goto out_nochange;
}
if (path & USB_PATH_CP) {
pr_info("DEBUG: set USB path to CP\n");
#if defined(CONFIG_MACH_P4NOTE)
gpio_set_value(GPIO_USB_SEL0, 0);
gpio_set_value(GPIO_USB_SEL1, 1);
#else
gpio_set_value(GPIO_USB_SEL1, 0);
gpio_set_value(GPIO_USB_SEL2, 0);
gpio_set_value(GPIO_USB_SEL3, 1);
#endif
mdelay(3);
goto out_cp;
}
#if defined(CONFIG_MACH_P4NOTE)
if (path & USB_PATH_AP) {
gpio_set_value(GPIO_USB_SEL0, 1);
gpio_set_value(GPIO_USB_SEL1, 1);
goto out_ap;
}
#else
if (path & USB_PATH_OTG) {
gpio_set_value(GPIO_USB_SEL1, 1);
/* don't care SEL2 */
gpio_set_value(GPIO_USB_SEL3, 1);
goto out_ap;
}
if (path & USB_PATH_HOST) {
#ifndef CONFIG_MACH_P8LTE
gpio_set_value(GPIO_USB_SEL1, 1);
#endif
/* don't care SEL2 */
gpio_set_value(GPIO_USB_SEL3, 0);
goto out_ap;
}
#endif
/* default */
#if defined(CONFIG_MACH_P4NOTE)
gpio_set_value(GPIO_USB_SEL0, 1);
gpio_set_value(GPIO_USB_SEL1, 1);
#else
gpio_set_value(GPIO_USB_SEL1, 1);
#ifdef CONFIG_MACH_P8LTE
gpio_set_value(GPIO_USB_SEL2, 1);
#else
gpio_set_value(GPIO_USB_SEL2, 0);
#endif
gpio_set_value(GPIO_USB_SEL3, 1);
#endif
out_ap:
pr_info("%s: %x safeout2 off\n", __func__, path);
pmic_safeout2(0);
goto sysfs_noti;
out_cp:
pr_info("%s: %x safeout2 on\n", __func__, path);
pmic_safeout2(1);
goto sysfs_noti;
out_nochange:
pr_info("%s: %x safeout2 no change\n", __func__, path);
return;
sysfs_noti:
pr_info("%s: send \"usb_sel\" sysfs_notify\n", __func__);
sysfs_notify(&sec_switch_dev->kobj, NULL, "usb_sel");
return;
}
/*
Typical usage of usb switch:
usb_switch_lock(); (alternatively from hard/soft irq context)
( or usb_switch_trylock() )
...
usb_switch_set_path(USB_PATH_ADCCHECK);
...
usb_switch_set_path(USB_PATH_TA);
...
usb_switch_unlock(); (this restores previous usb switch settings)
*/
void usb_switch_set_path(enum usb_path_t path)
{
pr_info("%s: %x current_path before changing\n",
__func__, current_path);
current_path |= path;
usb_apply_path(current_path);
}
void usb_switch_clr_path(enum usb_path_t path)
{
pr_info("%s: %x current_path before changing\n",
__func__, current_path);
current_path &= ~path;
usb_apply_path(current_path);
}
int usb_switch_lock(void)
{
return down_interruptible(&usb_switch_sem);
}
int usb_switch_trylock(void)
{
return down_trylock(&usb_switch_sem);
}
void usb_switch_unlock(void)
{
up(&usb_switch_sem);
}
#ifdef CONFIG_MACH_P4NOTE
static void init_gpio(void)
{
s3c_gpio_cfgpin(GPIO_USB_SEL0, S3C_GPIO_OUTPUT);
s3c_gpio_setpull(GPIO_USB_SEL0, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GPIO_USB_SEL1, S3C_GPIO_OUTPUT);
s3c_gpio_setpull(GPIO_USB_SEL1, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GPIO_USB_SEL_CP, S3C_GPIO_OUTPUT);
s3c_gpio_setpull(GPIO_USB_SEL_CP, S3C_GPIO_PULL_NONE);
s3c_gpio_cfgpin(GPIO_UART_SEL, S3C_GPIO_OUTPUT);
s3c_gpio_setpull(GPIO_UART_SEL, S3C_GPIO_PULL_NONE);
}
#endif
static int __init usb_switch_init(void)
{
int ret;
#if defined(CONFIG_MACH_P4NOTE)
gpio_request(GPIO_USB_SEL0, "GPIO_USB_SEL0");
gpio_request(GPIO_USB_SEL1, "GPIO_USB_SEL1");
gpio_request(GPIO_USB_SEL_CP, "GPIO_USB_SEL_CP");
gpio_request(GPIO_UART_SEL, "GPIO_UART_SEL");
#else
gpio_request(GPIO_USB_SEL1, "GPIO_USB_SEL1");
gpio_request(GPIO_USB_SEL2, "GPIO_USB_SEL2");
gpio_request(GPIO_USB_SEL3, "GPIO_USB_SEL3");
#ifdef CONFIG_MACH_P8LTE
gpio_request(GPIO_UART_SEL1, "GPIO_UART_SEL1");
gpio_request(GPIO_UART_SEL2, "GPIO_UART_SEL2");
#else
gpio_request(GPIO_UART_SEL, "GPIO_UART_SEL");
#endif
#endif
#if defined(CONFIG_MACH_P4NOTE)
gpio_export(GPIO_USB_SEL0, 1);
gpio_export(GPIO_USB_SEL1, 1);
gpio_export(GPIO_USB_SEL_CP, 1);
gpio_export(GPIO_UART_SEL, 1);
#else
gpio_export(GPIO_USB_SEL1, 1);
gpio_export(GPIO_USB_SEL2, 1);
gpio_export(GPIO_USB_SEL3, 1);
#ifdef CONFIG_MACH_P8LTE
gpio_export(GPIO_UART_SEL1, 1);
gpio_export(GPIO_UART_SEL2, 1);
#else
gpio_export(GPIO_UART_SEL, 1);
#endif
#endif
BUG_ON(!sec_class);
sec_switch_dev = device_create(sec_class, NULL, 0, NULL, "switch");
BUG_ON(!sec_switch_dev);
#if defined(CONFIG_MACH_P4NOTE)
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL0", GPIO_USB_SEL0);
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL1", GPIO_USB_SEL1);
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL_CP", GPIO_USB_SEL_CP);
gpio_export_link(sec_switch_dev, "GPIO_UART_SEL", GPIO_UART_SEL);
#else
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL1", GPIO_USB_SEL1);
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL2", GPIO_USB_SEL2);
gpio_export_link(sec_switch_dev, "GPIO_USB_SEL3", GPIO_USB_SEL3);
#ifdef CONFIG_MACH_P8LTE
gpio_export_link(sec_switch_dev, "GPIO_UART_SEL1", GPIO_UART_SEL1);
gpio_export_link(sec_switch_dev, "GPIO_UART_SEL2", GPIO_UART_SEL2);
#else
gpio_export_link(sec_switch_dev, "GPIO_UART_SEL", GPIO_UART_SEL);
#endif
#endif
/*init_MUTEX(&usb_switch_sem);*/
sema_init(&usb_switch_sem, 1);
#ifdef CONFIG_MACH_P4NOTE
init_gpio();
#endif
#if !defined(CONFIG_MACH_P4NOTE)
if (!gpio_get_value(GPIO_USB_SEL1)) {
#else
if ((!gpio_get_value(GPIO_USB_SEL0)) && (gpio_get_value(GPIO_USB_SEL1))) {
#endif
usb_switch_lock();
usb_switch_set_path(USB_PATH_CP);
usb_switch_unlock();
}
/* create sysfs group */
ret = sysfs_create_group(&sec_switch_dev->kobj, &px_switch_group);
if (ret) {
pr_err("failed to create px switch attribute group\n");
return ret;
}
return 0;
}
device_initcall(usb_switch_init);
|
