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path: root/drivers/media/video/cx18/cx18-gpio.c
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Diffstat (limited to 'drivers/media/video/cx18/cx18-gpio.c')
-rw-r--r--drivers/media/video/cx18/cx18-gpio.c47
1 files changed, 36 insertions, 11 deletions
diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c
index 19253e6b8673..bb8bc86086d0 100644
--- a/drivers/media/video/cx18/cx18-gpio.c
+++ b/drivers/media/video/cx18/cx18-gpio.c
@@ -35,6 +35,9 @@
#define CX18_REG_GPIO_OUT2 0xc78104
#define CX18_REG_GPIO_DIR2 0xc7810c
+static u32 gpio_dir;
+static u32 gpio_val;
+
/*
* HVR-1600 GPIO pins, courtesy of Hauppauge:
*
@@ -44,31 +47,53 @@
* gpio13: cs5345 reset pin
*/
+static void gpio_write(struct cx18 *cx)
+{
+ write_reg((gpio_dir & 0xffff) << 16, CX18_REG_GPIO_DIR1);
+ write_reg(((gpio_dir & 0xffff) << 16) | (gpio_val & 0xffff),
+ CX18_REG_GPIO_OUT1);
+ write_reg(gpio_dir & 0xffff0000, CX18_REG_GPIO_DIR2);
+ write_reg((gpio_dir & 0xffff0000) | ((gpio_val & 0xffff0000) >> 16),
+ CX18_REG_GPIO_OUT2);
+}
+
void cx18_gpio_init(struct cx18 *cx)
{
- if (cx->card->gpio_init.direction == 0)
+ gpio_dir = cx->card->gpio_init.direction;
+ gpio_val = cx->card->gpio_init.initial_value;
+
+ if (gpio_dir == 0)
return;
- CX18_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
- read_reg(CX18_REG_GPIO_DIR1), read_reg(CX18_REG_GPIO_OUT1));
+ gpio_dir |= 1 << cx->card->xceive_pin;
+ gpio_val |= 1 << cx->card->xceive_pin;
- /* init output data then direction */
- write_reg(cx->card->gpio_init.direction << 16, CX18_REG_GPIO_DIR1);
- write_reg(0, CX18_REG_GPIO_DIR2);
- write_reg((cx->card->gpio_init.direction << 16) |
- cx->card->gpio_init.initial_value, CX18_REG_GPIO_OUT1);
- write_reg(0, CX18_REG_GPIO_OUT2);
+ 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);
}
/* Xceive tuner reset function */
int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
{
struct i2c_algo_bit_data *algo = dev;
- struct cx18 *cx = algo->data;
-/* int curdir, curout;*/
+ struct cx18_i2c_algo_callback_data *cb_data = algo->data;
+ struct cx18 *cx = cb_data->cx;
if (cmd != XC2028_TUNER_RESET)
return 0;
CX18_DEBUG_INFO("Resetting tuner\n");
+
+ gpio_dir |= 1 << cx->card->xceive_pin;
+ gpio_val &= ~(1 << cx->card->xceive_pin);
+
+ gpio_write(cx);
+ schedule_timeout_interruptible(msecs_to_jiffies(1));
+
+ gpio_val |= 1 << cx->card->xceive_pin;
+ gpio_write(cx);
+ schedule_timeout_interruptible(msecs_to_jiffies(1));
return 0;
}