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path: root/drivers/media/pci/solo6x10/solo6x10-gpio.c
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Diffstat (limited to 'drivers/media/pci/solo6x10/solo6x10-gpio.c')
-rw-r--r--drivers/media/pci/solo6x10/solo6x10-gpio.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/media/pci/solo6x10/solo6x10-gpio.c b/drivers/media/pci/solo6x10/solo6x10-gpio.c
index 6d3b4a36bc11..3d0d1aa2f6a8 100644
--- a/drivers/media/pci/solo6x10/solo6x10-gpio.c
+++ b/drivers/media/pci/solo6x10/solo6x10-gpio.c
@@ -57,6 +57,9 @@ static void solo_gpio_mode(struct solo_dev *solo_dev,
ret |= 1 << port;
}
+ /* Enable GPIO[31:16] */
+ ret |= 0xffff0000;
+
solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
}
@@ -90,16 +93,110 @@ static void solo_gpio_config(struct solo_dev *solo_dev)
/* Initially set relay status to 0 */
solo_gpio_clear(solo_dev, 0xff00);
+
+ /* Set input pins direction */
+ solo_gpio_mode(solo_dev, 0xffff0000, 0);
+}
+
+#ifdef CONFIG_GPIOLIB
+/* Pins 0-7 are not exported, because it seems from code above they are
+ * used for internal purposes. So offset 0 corresponds to pin 8, therefore
+ * offsets 0-7 are relay GPIOs, 8-23 - input GPIOs.
+ */
+static int solo_gpiochip_get_direction(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ int ret, mode;
+ struct solo_dev *solo_dev = gpiochip_get_data(chip);
+
+ if (offset < 8) {
+ ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
+ mode = 3 & (ret >> ((offset + 8) * 2));
+ } else {
+ ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
+ mode = 1 & (ret >> (offset - 8));
+ }
+
+ if (!mode)
+ return 1;
+ else if (mode == 1)
+ return 0;
+
+ return -1;
}
+static int solo_gpiochip_direction_input(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ return -1;
+}
+
+static int solo_gpiochip_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ return -1;
+}
+
+static int solo_gpiochip_get(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ int ret;
+ struct solo_dev *solo_dev = gpiochip_get_data(chip);
+
+ ret = solo_reg_read(solo_dev, SOLO_GPIO_DATA_IN);
+
+ return 1 & (ret >> (offset + 8));
+}
+
+static void solo_gpiochip_set(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ struct solo_dev *solo_dev = gpiochip_get_data(chip);
+
+ if (value)
+ solo_gpio_set(solo_dev, 1 << (offset + 8));
+ else
+ solo_gpio_clear(solo_dev, 1 << (offset + 8));
+}
+#endif
+
int solo_gpio_init(struct solo_dev *solo_dev)
{
+ int ret;
+
solo_gpio_config(solo_dev);
+#ifdef CONFIG_GPIOLIB
+ solo_dev->gpio_dev.label = SOLO6X10_NAME"_gpio";
+ solo_dev->gpio_dev.parent = &solo_dev->pdev->dev;
+ solo_dev->gpio_dev.owner = THIS_MODULE;
+ solo_dev->gpio_dev.base = -1;
+ solo_dev->gpio_dev.ngpio = 24;
+ solo_dev->gpio_dev.can_sleep = 0;
+
+ solo_dev->gpio_dev.get_direction = solo_gpiochip_get_direction;
+ solo_dev->gpio_dev.direction_input = solo_gpiochip_direction_input;
+ solo_dev->gpio_dev.direction_output = solo_gpiochip_direction_output;
+ solo_dev->gpio_dev.get = solo_gpiochip_get;
+ solo_dev->gpio_dev.set = solo_gpiochip_set;
+
+ ret = gpiochip_add_data(&solo_dev->gpio_dev, solo_dev);
+
+ if (ret) {
+ solo_dev->gpio_dev.label = NULL;
+ return -1;
+ }
+#endif
return 0;
}
void solo_gpio_exit(struct solo_dev *solo_dev)
{
+#ifdef CONFIG_GPIOLIB
+ if (solo_dev->gpio_dev.label) {
+ gpiochip_remove(&solo_dev->gpio_dev);
+ solo_dev->gpio_dev.label = NULL;
+ }
+#endif
solo_gpio_clear(solo_dev, 0x30);
solo_gpio_config(solo_dev);
}