diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-gpio.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-gpio.c | 47 |
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; } |