[media] Nova-S-Plus audio line input

This patch adds audio DMA capture and ALSA mixer elements for the line
input jack of the Hauppauge Nova-S-plus DVB-S PCI card.  The Nova-S-plus
has a WM8775 ADC that is currently not detected.  This patch enables
this chip and exports volume, balance mute and ALC elements for ALSA
mixer controls.

[mchehab@redhat.com: Fix CodingStyle issues]
Signed-off-by: Lawrence Rust <lawrence@softsystem.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

6 files changed, 192 insertions, 54 deletions

diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c
index 54b7fcd469a..4aaa47c0eab 100644
--- a/drivers/media/video/cx88/cx88-alsa.c
+++ b/drivers/media/video/cx88/cx88-alsa.c
@@ -40,6 +40,7 @@
 #include <sound/control.h>
 #include <sound/initval.h>
 #include <sound/tlv.h>
+#include <media/wm8775.h>
 
 #include "cx88.h"
 #include "cx88-reg.h"
@@ -586,26 +587,47 @@ static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
         int left, right, v, b;
         int changed = 0;
         u32 old;
+        struct v4l2_control client_ctl;
+
+        /* Pass volume & balance onto any WM8775 */
+        if (value->value.integer.value[0] >= value->value.integer.value[1]) {
+                v = value->value.integer.value[0] << 10;
+                b = value->value.integer.value[0] ?
+                        (0x8000 * value->value.integer.value[1]) / value->value.integer.value[0] :
+                        0x8000;
+        } else {
+                v = value->value.integer.value[1] << 10;
+                b = value->value.integer.value[1] ?
+                0xffff - (0x8000 * value->value.integer.value[0]) / value->value.integer.value[1] :
+                0x8000;
+        }
+        client_ctl.value = v;
+        client_ctl.id = V4L2_CID_AUDIO_VOLUME;
+        call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
+
+        client_ctl.value = b;
+        client_ctl.id = V4L2_CID_AUDIO_BALANCE;
+        call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 
         left = value->value.integer.value[0] & 0x3f;
         right = value->value.integer.value[1] & 0x3f;
         b = right - left;
         if (b < 0) {
-            v = 0x3f - left;
-            b = (-b) | 0x40;
+                v = 0x3f - left;
+                b = (-b) | 0x40;
         } else {
-            v = 0x3f - right;
+                v = 0x3f - right;
         }
         /* Do we really know this will always be called with IRQs on? */
         spin_lock_irq(&chip->reg_lock);
         old = cx_read(AUD_VOL_CTL);
         if (v != (old & 0x3f)) {
-            cx_write(AUD_VOL_CTL, (old & ~0x3f) | v);
-            changed = 1;
+                cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
+                changed = 1;
         }
-        if (cx_read(AUD_BAL_CTL) != b) {
-            cx_write(AUD_BAL_CTL, b);
-            changed = 1;
+        if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
+                cx_write(AUD_BAL_CTL, b);
+                changed = 1;
         }
         spin_unlock_irq(&chip->reg_lock);
 
@@ -618,7 +640,7 @@ static const struct snd_kcontrol_new snd_cx88_volume = {
         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
-        .name = "Playback Volume",
+        .name = "Analog-TV Volume",
         .info = snd_cx88_volume_info,
         .get = snd_cx88_volume_get,
         .put = snd_cx88_volume_put,
@@ -649,7 +671,14 @@ static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
         vol = cx_read(AUD_VOL_CTL);
         if (value->value.integer.value[0] != !(vol & bit)) {
                 vol ^= bit;
-                cx_write(AUD_VOL_CTL, vol);
+                cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
+                /* Pass mute onto any WM8775 */
+                if ((1<<6) == bit) {
+                        struct v4l2_control client_ctl;
+                        client_ctl.value = 0 != (vol & bit);
+                        client_ctl.id = V4L2_CID_AUDIO_MUTE;
+                        call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
+                }
                 ret = 1;
         }
         spin_unlock_irq(&chip->reg_lock);
@@ -658,7 +687,7 @@ static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 
 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-        .name = "Playback Switch",
+        .name = "Audio-Out Switch",
         .info = snd_ctl_boolean_mono_info,
         .get = snd_cx88_switch_get,
         .put = snd_cx88_switch_put,
@@ -667,13 +696,49 @@ static const struct snd_kcontrol_new snd_cx88_dac_switch = {
 
 static const struct snd_kcontrol_new snd_cx88_source_switch = {
         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-        .name = "Capture Switch",
+        .name = "Analog-TV Switch",
         .info = snd_ctl_boolean_mono_info,
         .get = snd_cx88_switch_get,
         .put = snd_cx88_switch_put,
         .private_value = (1<<6),
 };
 
+static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
+                               struct snd_ctl_elem_value *value)
+{
+        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
+        struct cx88_core *core = chip->core;
+        struct v4l2_control client_ctl;
+
+        client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
+        call_hw(core, WM8775_GID, core, g_ctrl, &client_ctl);
+        value->value.integer.value[0] = client_ctl.value ? 1 : 0;
+
+        return 0;
+}
+
+static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
+                                       struct snd_ctl_elem_value *value)
+{
+        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
+        struct cx88_core *core = chip->core;
+        struct v4l2_control client_ctl;
+
+        client_ctl.value = 0 != value->value.integer.value[0];
+        client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
+        call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
+
+        return 0;
+}
+
+static struct snd_kcontrol_new snd_cx88_alc_switch = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name = "Line-In ALC Switch",
+        .info = snd_ctl_boolean_mono_info,
+        .get = snd_cx88_alc_get,
+        .put = snd_cx88_alc_put,
+};
+
 /****************************************************************************
                         Basic Flow for Sound Devices
  ****************************************************************************/
@@ -795,6 +860,7 @@ static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 {
         struct snd_card  *card;
         snd_cx88_card_t  *chip;
+        struct v4l2_subdev *sd;
         int              err;
 
         if (devno >= SNDRV_CARDS)
@@ -830,6 +896,15 @@ static int __devinit cx88_audio_initdev(struct pci_dev *pci,
         if (err < 0)
                 goto error;
 
+        /* If there's a wm8775 then add a Line-In ALC switch */
+        list_for_each_entry(sd, &chip->core->v4l2_dev.subdevs, list) {
+                if (WM8775_GID == sd->grp_id) {
+                        snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch,
+                                                       chip));
+                        break;
+                }
+        }
+
         strcpy (card->driver, "CX88x");
         sprintf(card->shortname, "Conexant CX%x", pci->device);
         sprintf(card->longname, "%s at %#llx",
diff --git a/drivers/media/video/cx88/cx88-cards.c b/drivers/media/video/cx88/cx88-cards.c
index 7bfe330a816..b26fcba8600 100644
--- a/drivers/media/video/cx88/cx88-cards.c
+++ b/drivers/media/video/cx88/cx88-cards.c
@@ -970,15 +970,22 @@ static const struct cx88_board cx88_boards[] = {
                 .radio_type     = UNSET,
                 .tuner_addr     = ADDR_UNSET,
                 .radio_addr     = ADDR_UNSET,
+                .audio_chip = V4L2_IDENT_WM8775,
                 .input          = {{
                         .type   = CX88_VMUX_DVB,
                         .vmux   = 0,
+                        /* 2: Line-In */
+                        .audioroute = 2,
                 },{
                         .type   = CX88_VMUX_COMPOSITE1,
                         .vmux   = 1,
+                        /* 2: Line-In */
+                        .audioroute = 2,
                 },{
                         .type   = CX88_VMUX_SVIDEO,
                         .vmux   = 2,
+                        /* 2: Line-In */
+                        .audioroute = 2,
                 }},
                 .mpeg           = CX88_MPEG_DVB,
         },
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index e3cff585215..d2f159daa8b 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -41,6 +41,7 @@
 #include "cx88.h"
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
+#include <media/wm8775.h>
 
 MODULE_DESCRIPTION("v4l2 driver module for cx2388x based TV cards");
 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
@@ -977,6 +978,7 @@ int cx88_set_control(struct cx88_core *core, struct v4l2_control *ctl)
         const struct cx88_ctrl *c = NULL;
         u32 value,mask;
         int i;
+        struct v4l2_control client_ctl;
 
         for (i = 0; i < CX8800_CTLS; i++) {
                 if (cx8800_ctls[i].v.id == ctl->id) {
@@ -990,6 +992,27 @@ int cx88_set_control(struct cx88_core *core, struct v4l2_control *ctl)
                 ctl->value = c->v.minimum;
         if (ctl->value > c->v.maximum)
                 ctl->value = c->v.maximum;
+
+        /* Pass changes onto any WM8775 */
+        client_ctl.id = ctl->id;
+        switch (ctl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                client_ctl.value = ctl->value;
+                break;
+        case V4L2_CID_AUDIO_VOLUME:
+                client_ctl.value = (ctl->value) ?
+                        (0x90 + ctl->value) << 8 : 0;
+                break;
+        case V4L2_CID_AUDIO_BALANCE:
+                client_ctl.value = ctl->value << 9;
+                break;
+        default:
+                client_ctl.id = 0;
+                break;
+        }
+        if (client_ctl.id)
+                call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
+
         mask=c->mask;
         switch (ctl->id) {
         case V4L2_CID_AUDIO_BALANCE:
@@ -1536,7 +1559,9 @@ static int radio_queryctrl (struct file *file, void *priv,
         if (c->id <  V4L2_CID_BASE ||
                 c->id >= V4L2_CID_LASTP1)
                 return -EINVAL;
-        if (c->id == V4L2_CID_AUDIO_MUTE) {
+        if (c->id == V4L2_CID_AUDIO_MUTE ||
+                c->id == V4L2_CID_AUDIO_VOLUME ||
+                c->id == V4L2_CID_AUDIO_BALANCE) {
                 for (i = 0; i < CX8800_CTLS; i++) {
                         if (cx8800_ctls[i].v.id == c->id)
                                 break;
diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h
index c9981e77416..e8c732e7ae4 100644
--- a/drivers/media/video/cx88/cx88.h
+++ b/drivers/media/video/cx88/cx88.h
@@ -398,17 +398,19 @@ static inline struct cx88_core *to_core(struct v4l2_device *v4l2_dev)
         return container_of(v4l2_dev, struct cx88_core, v4l2_dev);
 }
 
-#define call_all(core, o, f, args...)                           \
+#define call_hw(core, grpid, o, f, args...) \
         do {                                                    \
                 if (!core->i2c_rc) {                            \
                         if (core->gate_ctrl)                    \
                                 core->gate_ctrl(core, 1);       \
-                        v4l2_device_call_all(&core->v4l2_dev, 0, o, f, ##args); \
+                        v4l2_device_call_all(&core->v4l2_dev, grpid, o, f, ##args); \
                         if (core->gate_ctrl)                    \
                                 core->gate_ctrl(core, 0);       \
                 }                                               \
         } while (0)
 
+#define call_all(core, o, f, args...) call_hw(core, 0, o, f, ##args)
+
 struct cx8800_dev;
 struct cx8802_dev;
 
diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c
index fe8ef6419f8..13552564908 100644
--- a/drivers/media/video/wm8775.c
+++ b/drivers/media/video/wm8775.c
@@ -35,6 +35,7 @@
 #include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-ctrls.h>
+#include <media/wm8775.h>
 
 MODULE_DESCRIPTION("wm8775 driver");
 MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
@@ -50,10 +51,16 @@ enum {
         TOT_REGS
 };
 
+#define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */
+#define ALC_EN 0x100  /* R17: ALC enable */
+
 struct wm8775_state {
         struct v4l2_subdev sd;
         struct v4l2_ctrl_handler hdl;
         struct v4l2_ctrl *mute;
+        struct v4l2_ctrl *vol;
+        struct v4l2_ctrl *bal;
+        struct v4l2_ctrl *loud;
         u8 input;               /* Last selected input (0-0xf) */
 };
 
@@ -85,6 +92,30 @@ static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val)
         return -1;
 }
 
+static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly)
+{
+        struct wm8775_state *state = to_state(sd);
+        u8 vol_l, vol_r;
+        int muted = 0 != state->mute->val;
+        u16 volume = (u16)state->vol->val;
+        u16 balance = (u16)state->bal->val;
+
+        /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */
+        vol_l = (min(65536 - balance, 32768) * volume) >> 23;
+        vol_r = (min(balance, (u16)32768) * volume) >> 23;
+
+        /* Mute */
+        if (muted || quietly)
+                wm8775_write(sd, R21, 0x0c0 | state->input);
+
+        wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */
+        wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */
+
+        /* Un-mute */
+        if (!muted)
+                wm8775_write(sd, R21, state->input);
+}
+
 static int wm8775_s_routing(struct v4l2_subdev *sd,
                             u32 input, u32 output, u32 config)
 {
@@ -102,25 +133,26 @@ static int wm8775_s_routing(struct v4l2_subdev *sd,
         state->input = input;
         if (!v4l2_ctrl_g_ctrl(state->mute))
                 return 0;
-        wm8775_write(sd, R21, 0x0c0);
-        wm8775_write(sd, R14, 0x1d4);
-        wm8775_write(sd, R15, 0x1d4);
-        wm8775_write(sd, R21, 0x100 + state->input);
+        if (!v4l2_ctrl_g_ctrl(state->vol))
+                return 0;
+        if (!v4l2_ctrl_g_ctrl(state->bal))
+                return 0;
+        wm8775_set_audio(sd, 1);
         return 0;
 }
 
 static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl)
 {
         struct v4l2_subdev *sd = to_sd(ctrl);
-        struct wm8775_state *state = to_state(sd);
 
         switch (ctrl->id) {
         case V4L2_CID_AUDIO_MUTE:
-                wm8775_write(sd, R21, 0x0c0);
-                wm8775_write(sd, R14, 0x1d4);
-                wm8775_write(sd, R15, 0x1d4);
-                if (!ctrl->val)
-                        wm8775_write(sd, R21, 0x100 + state->input);
+        case V4L2_CID_AUDIO_VOLUME:
+        case V4L2_CID_AUDIO_BALANCE:
+                wm8775_set_audio(sd, 0);
+                return 0;
+        case V4L2_CID_AUDIO_LOUDNESS:
+                wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD);
                 return 0;
         }
         return -EINVAL;
@@ -144,16 +176,7 @@ static int wm8775_log_status(struct v4l2_subdev *sd)
 
 static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
 {
-        struct wm8775_state *state = to_state(sd);
-
-        /* If I remove this, then it can happen that I have no
-           sound the first time I tune from static to a valid channel.
-           It's difficult to reproduce and is almost certainly related
-           to the zero cross detect circuit. */
-        wm8775_write(sd, R21, 0x0c0);
-        wm8775_write(sd, R14, 0x1d4);
-        wm8775_write(sd, R15, 0x1d4);
-        wm8775_write(sd, R21, 0x100 + state->input);
+        wm8775_set_audio(sd, 0);
         return 0;
 }
 
@@ -203,6 +226,7 @@ static int wm8775_probe(struct i2c_client *client,
 {
         struct wm8775_state *state;
         struct v4l2_subdev *sd;
+        int err;
 
         /* Check if the adapter supports the needed features */
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -216,15 +240,21 @@ static int wm8775_probe(struct i2c_client *client,
                 return -ENOMEM;
         sd = &state->sd;
         v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
+        sd->grp_id = WM8775_GID; /* subdev group id */
         state->input = 2;
 
-        v4l2_ctrl_handler_init(&state->hdl, 1);
+        v4l2_ctrl_handler_init(&state->hdl, 4);
         state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
                         V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/
+        state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768);
+        state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1);
         sd->ctrl_handler = &state->hdl;
-        if (state->hdl.error) {
-                int err = state->hdl.error;
-
+        err = state->hdl.error;
+        if (err) {
                 v4l2_ctrl_handler_free(&state->hdl);
                 kfree(state);
                 return err;
@@ -236,29 +266,25 @@ static int wm8775_probe(struct i2c_client *client,
         wm8775_write(sd, R23, 0x000);
         /* Disable zero cross detect timeout */
         wm8775_write(sd, R7, 0x000);
-        /* Left justified, 24-bit mode */
-        wm8775_write(sd, R11, 0x021);
+        /* HPF enable, I2S mode, 24-bit */
+        wm8775_write(sd, R11, 0x022);
         /* Master mode, clock ratio 256fs */
         wm8775_write(sd, R12, 0x102);
         /* Powered up */
         wm8775_write(sd, R13, 0x000);
-        /* ADC gain +2.5dB, enable zero cross */
-        wm8775_write(sd, R14, 0x1d4);
-        /* ADC gain +2.5dB, enable zero cross */
-        wm8775_write(sd, R15, 0x1d4);
-        /* ALC Stereo, ALC target level -1dB FS max gain +8dB */
-        wm8775_write(sd, R16, 0x1bf);
-        /* Enable gain control, use zero cross detection,
-           ALC hold time 42.6 ms */
-        wm8775_write(sd, R17, 0x185);
+        /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */
+        wm8775_write(sd, R16, 0x1bb);
+        /* Set ALC mode and hold time */
+        wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD);
         /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */
         wm8775_write(sd, R18, 0x0a2);
         /* Enable noise gate, threshold -72dBfs */
         wm8775_write(sd, R19, 0x005);
-        /* Transient window 4ms, lower PGA gain limit -1dB */
-        wm8775_write(sd, R20, 0x07a);
-        /* LRBOTH = 1, use input 2. */
-        wm8775_write(sd, R21, 0x102);
+        /* Transient window 4ms, ALC min gain -5dB  */
+        wm8775_write(sd, R20, 0x0fb);
+
+        wm8775_set_audio(sd, 1);      /* set volume/mute/mux */
+
         return 0;
 }
 
diff --git a/include/media/wm8775.h b/include/media/wm8775.h
index 60739c5a23a..a1c4d417dfa 100644
--- a/include/media/wm8775.h
+++ b/include/media/wm8775.h
@@ -32,4 +32,7 @@
 #define WM8775_AIN3 4
 #define WM8775_AIN4 8
 
+/* subdev group ID */
+#define WM8775_GID (1 << 0)
+
 #endif