1 files changed, 88 insertions, 2 deletions

diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c
index b302833f6f9d..3d495dba4983 100644
--- a/drivers/media/video/cx18/cx18-gpio.c
+++ b/drivers/media/video/cx18/cx18-gpio.c
@@ -69,6 +69,7 @@ void cx18_reset_i2c_slaves_gpio(struct cx18 *cx)
 	/* Assuming that the masks are a subset of the bits in gpio_dir */
 
 	/* Assert */
+	mutex_lock(&cx->gpio_lock);
 	cx->gpio_val =
 		(cx->gpio_val | p->active_hi_mask) & ~(p->active_lo_mask);
 	gpio_write(cx);
@@ -79,10 +80,53 @@ void cx18_reset_i2c_slaves_gpio(struct cx18 *cx)
 		(cx->gpio_val | p->active_lo_mask) & ~(p->active_hi_mask);
 	gpio_write(cx);
 	schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_recovery));
+	mutex_unlock(&cx->gpio_lock);
 }
 
+void cx18_reset_ir_gpio(void *data)
+{
+	struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
+	const struct cx18_gpio_i2c_slave_reset *p;
+
+	p = &cx->card->gpio_i2c_slave_reset;
+
+	if (p->ir_reset_mask == 0)
+		return;
+
+	CX18_DEBUG_INFO("Resetting IR microcontroller\n");
+
+	/*
+	   Assert timing for the Z8F0811 on HVR-1600 boards:
+	   1. Assert RESET for min of 4 clock cycles at 18.432 MHz to initiate
+	   2. Reset then takes 66 WDT cycles at 10 kHz + 16 xtal clock cycles
+		(6,601,085 nanoseconds ~= 7 milliseconds)
+	   3. DBG pin must be high before chip exits reset for normal operation.
+		DBG is open drain and hopefully pulled high since we don't
+		normally drive it (GPIO 1?) for the HVR-1600
+	   4. Z8F0811 won't exit reset until RESET is deasserted
+	*/
+	mutex_lock(&cx->gpio_lock);
+	cx->gpio_val = cx->gpio_val & ~p->ir_reset_mask;
+	gpio_write(cx);
+	mutex_unlock(&cx->gpio_lock);
+	schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_asserted));
+
+	/*
+	   Zilog comes out of reset, loads reset vector address and executes
+	   from there. Required recovery delay unknown.
+	*/
+	mutex_lock(&cx->gpio_lock);
+	cx->gpio_val = cx->gpio_val | p->ir_reset_mask;
+	gpio_write(cx);
+	mutex_unlock(&cx->gpio_lock);
+	schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_recovery));
+}
+EXPORT_SYMBOL(cx18_reset_ir_gpio);
+/* This symbol is exported for use by an infrared module for the IR-blaster */
+
 void cx18_gpio_init(struct cx18 *cx)
 {
+	mutex_lock(&cx->gpio_lock);
 	cx->gpio_dir = cx->card->gpio_init.direction;
 	cx->gpio_val = cx->card->gpio_init.initial_value;
 
@@ -91,14 +135,17 @@ void cx18_gpio_init(struct cx18 *cx)
 		cx->gpio_val |= 1 << cx->card->xceive_pin;
 	}
 
-	if (cx->gpio_dir == 0)
+	if (cx->gpio_dir == 0) {
+		mutex_unlock(&cx->gpio_lock);
 		return;
+	}
 
 	CX18_DEBUG_INFO("GPIO initial dir: %08x/%08x out: %08x/%08x\n",
 		   read_reg(CX18_REG_GPIO_DIR1), read_reg(CX18_REG_GPIO_DIR2),
 		   read_reg(CX18_REG_GPIO_OUT1), read_reg(CX18_REG_GPIO_OUT2));
 
 	gpio_write(cx);
+	mutex_unlock(&cx->gpio_lock);
 }
 
 /* Xceive tuner reset function */
@@ -112,13 +159,52 @@ int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
 		return 0;
 	CX18_DEBUG_INFO("Resetting tuner\n");
 
+	mutex_lock(&cx->gpio_lock);
 	cx->gpio_val &= ~(1 << cx->card->xceive_pin);
-
 	gpio_write(cx);
+	mutex_unlock(&cx->gpio_lock);
 	schedule_timeout_interruptible(msecs_to_jiffies(1));
 
+	mutex_lock(&cx->gpio_lock);
 	cx->gpio_val |= 1 << cx->card->xceive_pin;
 	gpio_write(cx);
+	mutex_unlock(&cx->gpio_lock);
 	schedule_timeout_interruptible(msecs_to_jiffies(1));
 	return 0;
 }
+
+int cx18_gpio(struct cx18 *cx, unsigned int command, void *arg)
+{
+	struct v4l2_routing *route = arg;
+	u32 mask, data;
+
+	switch (command) {
+	case VIDIOC_INT_S_AUDIO_ROUTING:
+		if (route->input > 2)
+			return -EINVAL;
+		mask = cx->card->gpio_audio_input.mask;
+		switch (route->input) {
+		case 0:
+			data = cx->card->gpio_audio_input.tuner;
+			break;
+		case 1:
+			data = cx->card->gpio_audio_input.linein;
+			break;
+		case 2:
+		default:
+			data = cx->card->gpio_audio_input.radio;
+			break;
+		}
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	if (mask) {
+		mutex_lock(&cx->gpio_lock);
+		cx->gpio_val = (cx->gpio_val & ~mask) | (data & mask);
+		gpio_write(cx);
+		mutex_unlock(&cx->gpio_lock);
+	}
+	return 0;
+}