[ALSA] virtuoso: monitor external power on D2X

On the Xonar D2X, monitor the GPIO pin that indicates whether external
power is present.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 40 insertions, 0 deletions

diff --git a/sound/pci/oxygen/virtuoso.c b/sound/pci/oxygen/virtuoso.c
index 2e1a6996fa86..40e92f5cd69c 100644
--- a/sound/pci/oxygen/virtuoso.c
+++ b/sound/pci/oxygen/virtuoso.c
@@ -136,6 +136,11 @@ MODULE_DEVICE_TABLE(pci, xonar_ids);
 /* register 23 */
 #define PCM1796_ID_MASK         0x1f
 
+struct xonar_data {
+        u8 is_d2x;
+        u8 has_power;
+};
+
 static void pcm1796_write(struct oxygen *chip, unsigned int codec,
                           u8 reg, u8 value)
 {
@@ -153,8 +158,11 @@ static void pcm1796_write(struct oxygen *chip, unsigned int codec,
 
 static void xonar_init(struct oxygen *chip)
 {
+        struct xonar_data *data = chip->model_data;
         unsigned int i;
 
+        data->is_d2x = chip->pci->subsystem_device == 0x82b7;
+
         for (i = 0; i < 4; ++i) {
                 pcm1796_write(chip, i, 18, PCM1796_FMT_24_LJUST | PCM1796_ATLD);
                 pcm1796_write(chip, i, 19, PCM1796_FLT_SHARP | PCM1796_ATS_1);
@@ -169,6 +177,15 @@ static void xonar_init(struct oxygen *chip)
         oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
                               GPIO_CS5381_M_SINGLE,
                               GPIO_CS5381_M_MASK | GPIO_ALT);
+        if (data->is_d2x) {
+                oxygen_clear_bits16(chip, OXYGEN_GPIO_CONTROL,
+                                    GPIO_EXT_POWER);
+                oxygen_set_bits16(chip, OXYGEN_GPIO_INTERRUPT_MASK,
+                                  GPIO_EXT_POWER);
+                chip->interrupt_mask |= OXYGEN_INT_GPIO;
+                data->has_power = !!(oxygen_read16(chip, OXYGEN_GPIO_DATA)
+                                     & GPIO_EXT_POWER);
+        }
         oxygen_ac97_set_bits(chip, 0, CM9780_JACK, CM9780_FMIC2MIC);
         oxygen_ac97_clear_bits(chip, 0, CM9780_GPIO_STATUS, GPIO_LINE_MUTE);
         msleep(300);
@@ -234,6 +251,27 @@ static void set_cs5381_params(struct oxygen *chip,
                               value, GPIO_CS5381_M_MASK);
 }
 
+static void xonar_gpio_changed(struct oxygen *chip)
+{
+        struct xonar_data *data = chip->model_data;
+        u8 has_power;
+
+        if (!data->is_d2x)
+                return;
+        has_power = !!(oxygen_read16(chip, OXYGEN_GPIO_DATA)
+                       & GPIO_EXT_POWER);
+        if (has_power != data->has_power) {
+                data->has_power = has_power;
+                if (has_power) {
+                        snd_printk(KERN_NOTICE "power restored\n");
+                } else {
+                        snd_printk(KERN_CRIT
+                                   "Hey! Don't unplug the power cable!\n");
+                        /* TODO: stop PCMs */
+                }
+        }
+}
+
 static void mute_ac97_ctl(struct oxygen *chip, unsigned int control)
 {
         unsigned int index = chip->controls[control]->private_value & 0xff;
@@ -360,6 +398,8 @@ static const struct oxygen_model model_xonar = {
         .update_dac_volume = update_pcm1796_volume,
         .update_dac_mute = update_pcm1796_mute,
         .ac97_switch_hook = xonar_ac97_switch_hook,
+        .gpio_changed = xonar_gpio_changed,
+        .model_data_size = sizeof(struct xonar_data),
         .dac_channels = 8,
         .used_channels = OXYGEN_CHANNEL_B |
                          OXYGEN_CHANNEL_C |