diff options
Diffstat (limited to 'arch/arm/mach-exynos/p10-switch.c')
| -rw-r--r-- | arch/arm/mach-exynos/p10-switch.c | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/arch/arm/mach-exynos/p10-switch.c b/arch/arm/mach-exynos/p10-switch.c deleted file mode 100644 index 977b6e5..0000000 --- a/arch/arm/mach-exynos/p10-switch.c +++ /dev/null @@ -1,239 +0,0 @@ -#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 usb_apply_path(enum usb_path_t path) -{ - pr_info("%s: current gpio before changing : sel1:%d\n", - __func__, gpio_get_value(GPIO_USB_SEL1)); - pr_info("%s: target path %x\n", __func__, path); - - if (path & USB_PATH_ADCCHECK) { - gpio_set_value(GPIO_USB_SEL1, 0); - return; - } - - /* default : AP */ - gpio_set_value(GPIO_USB_SEL1, 1); - 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); -} - -static int __init usb_switch_init(void) -{ - int ret; - - gpio_request(GPIO_USB_SEL1, "GPIO_USB_SEL1"); - gpio_request(GPIO_UART_SEL, "GPIO_UART_SEL"); - - gpio_export(GPIO_USB_SEL1, 1); - gpio_export(GPIO_UART_SEL, 1); - - BUG_ON(!sec_class); - sec_switch_dev = device_create(sec_class, NULL, 0, NULL, "switch"); - - BUG_ON(!sec_switch_dev); - gpio_export_link(sec_switch_dev, "GPIO_USB_SEL1", GPIO_USB_SEL1); - gpio_export_link(sec_switch_dev, "GPIO_UART_SEL", GPIO_UART_SEL); - - /*init_MUTEX(&usb_switch_sem);*/ - sema_init(&usb_switch_sem, 1); - - /* 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); |