[PATCH] aoa: tas: fix initialisation/reset

This patch fixes the initialisation and reset of the tas codec.  The tas will
often reset if the i2s clocks go away so it needs to be completely
re-initialised when clocks come back.

Also, this patch adds some code for DRC that will be exploited later to add a
DRC control again, fixing a regression over snd-powermac.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 110 insertions, 24 deletions

diff --git a/sound/aoa/codecs/snd-aoa-codec-tas.c b/sound/aoa/codecs/snd-aoa-codec-tas.c
index 27c1e2eea22b..23643b342cb0 100644
--- a/sound/aoa/codecs/snd-aoa-codec-tas.c
+++ b/sound/aoa/codecs/snd-aoa-codec-tas.c
@@ -75,19 +75,24 @@ MODULE_DESCRIPTION("tas codec driver for snd-aoa");
 #include "../aoa.h"
 #include "../soundbus/soundbus.h"
 
-
 #define PFX "snd-aoa-codec-tas: "
 
+
 struct tas {
         struct aoa_codec        codec;
         struct i2c_client       i2c;
-        u32                     muted_l:1, muted_r:1,
-                                controls_created:1;
+        u32                     mute_l:1, mute_r:1 ,
+                                controls_created:1 ,
+                                drc_enabled:1,
+                                hw_enabled:1;
         u8                      cached_volume_l, cached_volume_r;
         u8                      mixer_l[3], mixer_r[3];
         u8                      acr;
+        int                     drc_range;
 };
 
+static int tas_reset_init(struct tas *tas);
+
 static struct tas *codec_to_tas(struct aoa_codec *codec)
 {
         return container_of(codec, struct tas, codec);
@@ -101,6 +106,28 @@ static inline int tas_write_reg(struct tas *tas, u8 reg, u8 len, u8 *data)
                 return i2c_smbus_write_i2c_block_data(&tas->i2c, reg, len, data);
 }
 
+static void tas3004_set_drc(struct tas *tas)
+{
+        unsigned char val[6];
+
+        if (tas->drc_enabled)
+                val[0] = 0x50; /* 3:1 above threshold */
+        else
+                val[0] = 0x51; /* disabled */
+        val[1] = 0x02; /* 1:1 below threshold */
+        if (tas->drc_range > 0xef)
+                val[2] = 0xef;
+        else if (tas->drc_range < 0)
+                val[2] = 0x00;
+        else
+                val[2] = tas->drc_range;
+        val[3] = 0xb0;
+        val[4] = 0x60;
+        val[5] = 0xa0;
+
+        tas_write_reg(tas, TAS_REG_DRC, 6, val);
+}
+
 static void tas_set_volume(struct tas *tas)
 {
         u8 block[6];
@@ -113,8 +140,8 @@ static void tas_set_volume(struct tas *tas)
         if (left > 177) left = 177;
         if (right > 177) right = 177;
 
-        if (tas->muted_l) left = 0;
-        if (tas->muted_r) right = 0;
+        if (tas->mute_l) left = 0;
+        if (tas->mute_r) right = 0;
 
         /* analysing the volume and mixer tables shows
          * that they are similar enough when we shift
@@ -202,7 +229,8 @@ static int tas_snd_vol_put(struct snd_kcontrol *kcontrol,
 
         tas->cached_volume_l = ucontrol->value.integer.value[0];
         tas->cached_volume_r = ucontrol->value.integer.value[1];
-        tas_set_volume(tas);
+        if (tas->hw_enabled)
+                tas_set_volume(tas);
         return 1;
 }
 
@@ -230,8 +258,8 @@ static int tas_snd_mute_get(struct snd_kcontrol *kcontrol,
 {
         struct tas *tas = snd_kcontrol_chip(kcontrol);
 
-        ucontrol->value.integer.value[0] = !tas->muted_l;
-        ucontrol->value.integer.value[1] = !tas->muted_r;
+        ucontrol->value.integer.value[0] = !tas->mute_l;
+        ucontrol->value.integer.value[1] = !tas->mute_r;
         return 0;
 }
 
@@ -240,13 +268,14 @@ static int tas_snd_mute_put(struct snd_kcontrol *kcontrol,
 {
         struct tas *tas = snd_kcontrol_chip(kcontrol);
 
-        if (tas->muted_l == !ucontrol->value.integer.value[0]
-         && tas->muted_r == !ucontrol->value.integer.value[1])
+        if (tas->mute_l == !ucontrol->value.integer.value[0]
+         && tas->mute_r == !ucontrol->value.integer.value[1])
                 return 0;
 
-        tas->muted_l = !ucontrol->value.integer.value[0];
-        tas->muted_r = !ucontrol->value.integer.value[1];
-        tas_set_volume(tas);
+        tas->mute_l = !ucontrol->value.integer.value[0];
+        tas->mute_r = !ucontrol->value.integer.value[1];
+        if (tas->hw_enabled)
+                tas_set_volume(tas);
         return 1;
 }
 
@@ -294,7 +323,8 @@ static int tas_snd_mixer_put(struct snd_kcontrol *kcontrol,
         tas->mixer_l[idx] = ucontrol->value.integer.value[0];
         tas->mixer_r[idx] = ucontrol->value.integer.value[1];
 
-        tas_set_mixer(tas);
+        if (tas->hw_enabled)
+                tas_set_mixer(tas);
         return 1;
 }
 
@@ -346,7 +376,8 @@ static int tas_snd_capture_source_put(struct snd_kcontrol *kcontrol,
                 tas->acr |= TAS_ACR_INPUT_B;
         if (oldacr == tas->acr)
                 return 0;
-        tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
+        if (tas->hw_enabled)
+                tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
         return 1;
 }
 
@@ -399,26 +430,66 @@ static int tas_usable(struct codec_info_item *cii,
 static int tas_reset_init(struct tas *tas)
 {
         u8 tmp;
+
+        tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
+        msleep(5);
         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
-        msleep(1);
+        msleep(5);
         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 1);
-        msleep(1);
+        msleep(20);
         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
-        msleep(1);
-
-        tas->acr &= ~TAS_ACR_ANALOG_PDOWN;
-        tas->acr |= TAS_ACR_B_MONAUREAL | TAS_ACR_B_MON_SEL_RIGHT;
-        if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
-                return -ENODEV;
+        msleep(10);
+        tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
 
         tmp = TAS_MCS_SCLK64 | TAS_MCS_SPORT_MODE_I2S | TAS_MCS_SPORT_WL_24BIT;
         if (tas_write_reg(tas, TAS_REG_MCS, 1, &tmp))
                 return -ENODEV;
 
+        tas->acr |= TAS_ACR_ANALOG_PDOWN | TAS_ACR_B_MONAUREAL |
+                TAS_ACR_B_MON_SEL_RIGHT;
+        if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
+                return -ENODEV;
+
         tmp = 0;
         if (tas_write_reg(tas, TAS_REG_MCS2, 1, &tmp))
                 return -ENODEV;
 
+        tas3004_set_drc(tas);
+
+        /* Set treble & bass to 0dB */
+        tmp = 114;
+        tas_write_reg(tas, TAS_REG_TREBLE, 1, &tmp);
+        tas_write_reg(tas, TAS_REG_BASS, 1, &tmp);
+
+        tas->acr &= ~TAS_ACR_ANALOG_PDOWN;
+        if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
+                return -ENODEV;
+
+        return 0;
+}
+
+static int tas_switch_clock(struct codec_info_item *cii, enum clock_switch clock)
+{
+        struct tas *tas = cii->codec_data;
+
+        switch(clock) {
+        case CLOCK_SWITCH_PREPARE_SLAVE:
+                /* Clocks are going away, mute mute mute */
+                tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
+                tas->hw_enabled = 0;
+                break;
+        case CLOCK_SWITCH_SLAVE:
+                /* Clocks are back, re-init the codec */
+                tas_reset_init(tas);
+                tas_set_volume(tas);
+                tas_set_mixer(tas);
+                tas->hw_enabled = 1;
+                tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
+                break;
+        default:
+                /* doesn't happen as of now */
+                return -EINVAL;
+        }
         return 0;
 }
 
@@ -427,6 +498,7 @@ static int tas_reset_init(struct tas *tas)
  * our i2c device is suspended, and then take note of that! */
 static int tas_suspend(struct tas *tas)
 {
+        tas->hw_enabled = 0;
         tas->acr |= TAS_ACR_ANALOG_PDOWN;
         tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
         return 0;
@@ -438,6 +510,7 @@ static int tas_resume(struct tas *tas)
         tas_reset_init(tas);
         tas_set_volume(tas);
         tas_set_mixer(tas);
+        tas->hw_enabled = 1;
         return 0;
 }
 
@@ -463,6 +536,7 @@ static struct codec_info tas_codec_info = {
         .bus_factor = 64,
         .owner = THIS_MODULE,
         .usable = tas_usable,
+        .switch_clock = tas_switch_clock,
 #ifdef CONFIG_PM
         .suspend = _tas_suspend,
         .resume = _tas_resume,
@@ -483,6 +557,7 @@ static int tas_init_codec(struct aoa_codec *codec)
                 printk(KERN_ERR PFX "tas failed to initialise\n");
                 return -ENXIO;
         }
+        tas->hw_enabled = 1;
 
         if (tas->codec.soundbus_dev->attach_codec(tas->codec.soundbus_dev,
                                                    aoa_get_card(),
@@ -548,6 +623,7 @@ static int tas_create(struct i2c_adapter *adapter,
         tas->i2c.driver = &tas_driver;
         tas->i2c.adapter = adapter;
         tas->i2c.addr = addr;
+        tas->drc_range = TAS3004_DRC_MAX;
         strlcpy(tas->i2c.name, "tas audio codec", I2C_NAME_SIZE-1);
 
         if (i2c_attach_client(&tas->i2c)) {
@@ -564,7 +640,9 @@ static int tas_create(struct i2c_adapter *adapter,
         if (aoa_codec_register(&tas->codec)) {
                 goto detach;
         }
-        printk(KERN_DEBUG "snd-aoa-codec-tas: created and attached tas instance\n");
+        printk(KERN_DEBUG
+               "snd-aoa-codec-tas: tas found, addr 0x%02x on %s\n",
+               addr, node->full_name);
         return 0;
  detach:
         i2c_detach_client(&tas->i2c);
diff --git a/sound/aoa/codecs/snd-aoa-codec-tas.h b/sound/aoa/codecs/snd-aoa-codec-tas.h
index daf81f45d83a..ae177e3466e6 100644
--- a/sound/aoa/codecs/snd-aoa-codec-tas.h
+++ b/sound/aoa/codecs/snd-aoa-codec-tas.h
@@ -44,4 +44,12 @@
 #define TAS_REG_LEFT_BIQUAD6    0x10
 #define TAS_REG_RIGHT_BIQUAD6   0x19
 
+#define TAS_REG_LEFT_LOUDNESS           0x21
+#define TAS_REG_RIGHT_LOUDNESS          0x22
+#define TAS_REG_LEFT_LOUDNESS_GAIN      0x23
+#define TAS_REG_RIGHT_LOUDNESS_GAIN     0x24
+
+#define TAS3001_DRC_MAX         0x5f
+#define TAS3004_DRC_MAX         0xef
+
 #endif /* __SND_AOA_CODECTASH */