[ALSA] Add Mic capture support.

CA0106 driver
Notes: This adds a new mixer item to switch between Mic and Line-in.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

2 files changed, 69 insertions, 1 deletions

diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h
index 67e56a530b22..beac9dad2ed9 100644
--- a/sound/pci/ca0106/ca0106.h
+++ b/sound/pci/ca0106/ca0106.h
@@ -589,6 +589,7 @@ struct snd_ca0106 {
         u32 spdif_bits[4];             /* s/pdif out setup */
         int spdif_enable;
         int capture_source;
+        int capture_mic_line_in;
 
         struct snd_dma_buffer buffer;
 };
diff --git a/sound/pci/ca0106/ca0106_mixer.c b/sound/pci/ca0106/ca0106_mixer.c
index 48e248608244..0e5e9ce0ff28 100644
--- a/sound/pci/ca0106/ca0106_mixer.c
+++ b/sound/pci/ca0106/ca0106_mixer.c
@@ -1,7 +1,7 @@
 /*
  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
- *  Version: 0.0.16
+ *  Version: 0.0.17
  *
  *  FEATURES currently supported:
  *    See ca0106_main.c for features.
@@ -37,6 +37,8 @@
  *    Separated ca0106.c into separate functional .c files.
  *  0.0.16
  *    Modified Copyright message.
+ *  0.0.17
+ *    Implement Mic and Line in Capture.
  *
  *  This code was initally based on code from ALSA's emu10k1x.c which is:
  *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
@@ -183,6 +185,65 @@ static snd_kcontrol_new_t snd_ca0106_capture_source __devinitdata =
         .put =          snd_ca0106_capture_source_put
 };
 
+static int snd_ca0106_capture_mic_line_in_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+        static char *texts[2] = { "Line in", "Mic in" };
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+        uinfo->count = 1;
+        uinfo->value.enumerated.items = 2;
+        if (uinfo->value.enumerated.item > 1)
+                uinfo->value.enumerated.item = 1;
+        strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+        return 0;
+}
+
+static int snd_ca0106_capture_mic_line_in_get(snd_kcontrol_t * kcontrol,
+                                        snd_ctl_elem_value_t * ucontrol)
+{
+        ca0106_t *emu = snd_kcontrol_chip(kcontrol);
+
+        ucontrol->value.enumerated.item[0] = emu->capture_mic_line_in;
+        return 0;
+}
+
+static int snd_ca0106_capture_mic_line_in_put(snd_kcontrol_t * kcontrol,
+                                        snd_ctl_elem_value_t * ucontrol)
+{
+        ca0106_t *emu = snd_kcontrol_chip(kcontrol);
+        unsigned int val;
+        int change = 0;
+        u32 tmp;
+
+        val = ucontrol->value.enumerated.item[0] ;
+        change = (emu->capture_mic_line_in != val);
+        if (change) {
+                emu->capture_mic_line_in = val;
+                if (val) {
+                        snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_PHONE); /* Mute input */
+                        tmp = inl(emu->port+GPIO) & ~0x400;
+                        tmp = tmp | 0x400;
+                        outl(tmp, emu->port+GPIO);
+                        snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_MIC);
+                } else {
+                        snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_PHONE); /* Mute input */
+                        tmp = inl(emu->port+GPIO) & ~0x400;
+                        outl(tmp, emu->port+GPIO);
+                        snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_LINEIN);
+                }
+        }
+        return change;
+}
+
+static snd_kcontrol_new_t snd_ca0106_capture_mic_line_in __devinitdata =
+{
+        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name =         "Mic/Line in Capture",
+        .info =         snd_ca0106_capture_mic_line_in_info,
+        .get =          snd_ca0106_capture_mic_line_in_get,
+        .put =          snd_ca0106_capture_mic_line_in_put
+};
+
 static int snd_ca0106_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 {
         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
@@ -620,6 +681,12 @@ int __devinit snd_ca0106_mixer(ca0106_t *emu)
                 return -ENOMEM;
         if ((err = snd_ctl_add(card, kctl)))
                 return err;
+        if (emu->details->i2c_adc == 1) {
+                if ((kctl = snd_ctl_new1(&snd_ca0106_capture_mic_line_in, emu)) == NULL)
+                        return -ENOMEM;
+                if ((err = snd_ctl_add(card, kctl)))
+                        return err;
+        }
         if ((kctl = snd_ctl_new1(&snd_ca0106_spdif_control, emu)) == NULL)
                 return -ENOMEM;
         if ((err = snd_ctl_add(card, kctl)))