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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.c57
1 files changed, 41 insertions, 16 deletions
diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c
index bb8bc86..b302833 100644
--- a/drivers/media/video/cx18/cx18-gpio.c
+++ b/drivers/media/video/cx18/cx18-gpio.c
@@ -35,9 +35,6 @@
#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:
*
@@ -49,24 +46,53 @@ static u32 gpio_val;
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),
+ u32 dir = cx->gpio_dir;
+ u32 val = cx->gpio_val;
+
+ write_reg((dir & 0xffff) << 16, CX18_REG_GPIO_DIR1);
+ write_reg(((dir & 0xffff) << 16) | (val & 0xffff),
CX18_REG_GPIO_OUT1);
- write_reg(gpio_dir & 0xffff0000, CX18_REG_GPIO_DIR2);
- write_reg((gpio_dir & 0xffff0000) | ((gpio_val & 0xffff0000) >> 16),
+ write_reg(dir & 0xffff0000, CX18_REG_GPIO_DIR2);
+ write_reg_sync((dir & 0xffff0000) | ((val & 0xffff0000) >> 16),
CX18_REG_GPIO_OUT2);
}
-void cx18_gpio_init(struct cx18 *cx)
+void cx18_reset_i2c_slaves_gpio(struct cx18 *cx)
{
- gpio_dir = cx->card->gpio_init.direction;
- gpio_val = cx->card->gpio_init.initial_value;
+ const struct cx18_gpio_i2c_slave_reset *p;
+
+ p = &cx->card->gpio_i2c_slave_reset;
- if (gpio_dir == 0)
+ if ((p->active_lo_mask | p->active_hi_mask) == 0)
return;
- gpio_dir |= 1 << cx->card->xceive_pin;
- gpio_val |= 1 << cx->card->xceive_pin;
+ /* Assuming that the masks are a subset of the bits in gpio_dir */
+
+ /* Assert */
+ cx->gpio_val =
+ (cx->gpio_val | p->active_hi_mask) & ~(p->active_lo_mask);
+ gpio_write(cx);
+ schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_asserted));
+
+ /* Deassert */
+ cx->gpio_val =
+ (cx->gpio_val | p->active_lo_mask) & ~(p->active_hi_mask);
+ gpio_write(cx);
+ schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_recovery));
+}
+
+void cx18_gpio_init(struct cx18 *cx)
+{
+ cx->gpio_dir = cx->card->gpio_init.direction;
+ cx->gpio_val = cx->card->gpio_init.initial_value;
+
+ if (cx->card->tuners[0].tuner == TUNER_XC2028) {
+ cx->gpio_dir |= 1 << cx->card->xceive_pin;
+ cx->gpio_val |= 1 << cx->card->xceive_pin;
+ }
+
+ if (cx->gpio_dir == 0)
+ 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),
@@ -86,13 +112,12 @@ int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
return 0;
CX18_DEBUG_INFO("Resetting tuner\n");
- gpio_dir |= 1 << cx->card->xceive_pin;
- gpio_val &= ~(1 << cx->card->xceive_pin);
+ cx->gpio_val &= ~(1 << cx->card->xceive_pin);
gpio_write(cx);
schedule_timeout_interruptible(msecs_to_jiffies(1));
- gpio_val |= 1 << cx->card->xceive_pin;
+ cx->gpio_val |= 1 << cx->card->xceive_pin;
gpio_write(cx);
schedule_timeout_interruptible(msecs_to_jiffies(1));
return 0;
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