From: 黄涛 <huangtao@rock-chips.com>
Date: Fri, 1 Apr 2011 13:06:33 +0000 (+0800)
Subject: rk29: add usb detect support
X-Git-Tag: firefly_0821_release~10576
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a8acee31a13d1391cb0d0e168f0a078861fcef45;p=firefly-linux-kernel-4.4.55.git

rk29: add usb detect support
---

diff --git a/arch/arm/mach-rk29/Makefile b/arch/arm/mach-rk29/Makefile
index 295047ac01c4..398be7942d47 100644
--- a/arch/arm/mach-rk29/Makefile
+++ b/arch/arm/mach-rk29/Makefile
@@ -4,6 +4,7 @@ obj-y += early_printk.o
 ifndef CONFIG_DEBUG_LL
 obj-y += ../kernel/debug.o
 endif
+obj-$(CONFIG_USB_GADGET) += usb_detect.o
 obj-$(CONFIG_PM) += pm.o
 obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_RK29_VPU) += vpu.o vpu_mem.o
diff --git a/arch/arm/mach-rk29/include/mach/board.h b/arch/arm/mach-rk29/include/mach/board.h
index abe5778cf62a..1b773db16b0a 100755
--- a/arch/arm/mach-rk29/include/mach/board.h
+++ b/arch/arm/mach-rk29/include/mach/board.h
@@ -15,14 +15,13 @@
 #ifndef __ASM_ARCH_RK29_BOARD_H
 #define __ASM_ARCH_RK29_BOARD_H
 
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
 #include <linux/types.h>
 #include <linux/timer.h>
 #include <linux/notifier.h>
 
-/* platform device data structures */
-struct platform_device;
-struct i2c_client;
-
 /*spi*/
 struct spi_cs_gpio {
 	const char *name;
@@ -244,4 +243,14 @@ void __init rk29_clock_init(void);
 #define BOOT_MODE_OFFMODE_CHARGING	5
 int board_boot_mode(void);
 
+/* for USB detection */
+#ifdef CONFIG_USB_GADGET
+int board_usb_detect_init(unsigned gpio, unsigned long flags);
+#else
+static int inline board_usb_detect_init(unsigned, unsigned long) { return 0; }
+#endif
+
+/* for wakeup Android */
+void rk28_send_wakeup_key(void);
+
 #endif
diff --git a/arch/arm/mach-rk29/usb_detect.c b/arch/arm/mach-rk29/usb_detect.c
new file mode 100644
index 000000000000..51339a520899
--- /dev/null
+++ b/arch/arm/mach-rk29/usb_detect.c
@@ -0,0 +1,48 @@
+#include <linux/wakelock.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <mach/board.h>
+
+static void do_wakeup(struct work_struct *work)
+{
+	rk28_send_wakeup_key();
+}
+
+static DECLARE_DELAYED_WORK(wakeup_work, do_wakeup);
+static bool wakelock_inited;
+static struct wake_lock usb_wakelock;
+
+static irqreturn_t detect_irq_handler(int irq, void *dev_id)
+{
+        wake_lock_timeout(&usb_wakelock, 10 * HZ);
+	schedule_delayed_work(&wakeup_work, HZ / 10);
+        return IRQ_HANDLED;
+}
+
+int board_usb_detect_init(unsigned gpio, unsigned long flags)
+{
+	int ret;
+	int irq = gpio_to_irq(gpio);
+
+	ret = gpio_request(gpio, "usb_detect");
+	if (ret < 0) {
+		pr_err("%s: gpio_request(%d) failed\n", __func__, gpio);
+		return ret;
+	}
+
+	if (!wakelock_inited)
+		wake_lock_init(&usb_wakelock, WAKE_LOCK_SUSPEND, "usb_detect");
+
+	gpio_direction_input(gpio);
+	ret = request_irq(irq, detect_irq_handler, flags, "usb_detect", NULL);
+	if (ret < 0) {
+		pr_err("%s: request_irq(%d) failed\n", __func__, irq);
+		gpio_free(gpio);
+		return ret;
+	}
+	enable_irq_wake(irq);
+
+	return 0;
+}
+
diff --git a/drivers/input/keyboard/rk29_keys.c b/drivers/input/keyboard/rk29_keys.c
index bf4dd4bb4996..a5f2d0fdeac7 100755
--- a/drivers/input/keyboard/rk29_keys.c
+++ b/drivers/input/keyboard/rk29_keys.c
@@ -57,6 +57,19 @@ struct rk29_keys_drvdata {
 	struct rk29_button_data data[0];
 };
 
+static struct input_dev *input_dev;
+
+void rk28_send_wakeup_key(void)
+{
+	if (!input_dev)
+		return;
+
+	input_report_key(input_dev, KEY_WAKEUP, 1);
+	input_sync(input_dev);
+	input_report_key(input_dev, KEY_WAKEUP, 0);
+	input_sync(input_dev);
+}
+
 static void keys_long_press_timer(unsigned long _data)
 {
 	int state;
@@ -282,6 +295,8 @@ static int __devinit keys_probe(struct platform_device *pdev)
 		input_set_capability(input, type, button->code);
 	}
 
+	input_set_capability(input, EV_KEY, KEY_WAKEUP);
+
 	error = input_register_device(input);
 	if (error) {
 		pr_err("gpio-keys: Unable to register input device, "
@@ -291,6 +306,8 @@ static int __devinit keys_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, wakeup);
 	error = device_create_file(&pdev->dev, &dev_attr_get_adc_value);
+
+	input_dev = input;
 	return error;
 
  fail2:
@@ -317,6 +334,7 @@ static int __devexit keys_remove(struct platform_device *pdev)
 	struct input_dev *input = ddata->input;
 	int i;
 
+	input_dev = NULL;
 	device_init_wakeup(&pdev->dev, 0);
 
 	for (i = 0; i < pdata->nbuttons; i++) {