ASoC: Factor out I/O for Wolfson 8 bit data 16 bit register CODECs

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 86 insertions, 158 deletions

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index c9baeae3e275..fe1307b500cf 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -225,94 +225,18 @@ struct wm8903_priv {
         struct snd_pcm_substream *slave_substream;
 };
 
-
-static unsigned int wm8903_read_reg_cache(struct snd_soc_codec *codec,
-                                                 unsigned int reg)
-{
-        u16 *cache = codec->reg_cache;
-
-        BUG_ON(reg >= ARRAY_SIZE(wm8903_reg_defaults));
-
-        return cache[reg];
-}
-
-static unsigned int wm8903_hw_read(struct snd_soc_codec *codec, u8 reg)
-{
-        struct i2c_msg xfer[2];
-        u16 data;
-        int ret;
-        struct i2c_client *client = codec->control_data;
-
-        /* Write register */
-        xfer[0].addr = client->addr;
-        xfer[0].flags = 0;
-        xfer[0].len = 1;
-        xfer[0].buf = ®
-
-        /* Read data */
-        xfer[1].addr = client->addr;
-        xfer[1].flags = I2C_M_RD;
-        xfer[1].len = 2;
-        xfer[1].buf = (u8 *)&data;
-
-        ret = i2c_transfer(client->adapter, xfer, 2);
-        if (ret != 2) {
-                pr_err("i2c_transfer returned %d\n", ret);
-                return 0;
-        }
-
-        return (data >> 8) | ((data & 0xff) << 8);
-}
-
-static unsigned int wm8903_read(struct snd_soc_codec *codec,
-                                unsigned int reg)
+static int wm8903_volatile_register(unsigned int reg)
 {
         switch (reg) {
         case WM8903_SW_RESET_AND_ID:
         case WM8903_REVISION_NUMBER:
         case WM8903_INTERRUPT_STATUS_1:
         case WM8903_WRITE_SEQUENCER_4:
-                return wm8903_hw_read(codec, reg);
+                return 1;
 
         default:
-                return wm8903_read_reg_cache(codec, reg);
-        }
-}
-
-static void wm8903_write_reg_cache(struct snd_soc_codec *codec,
-                                   u16 reg, unsigned int value)
-{
-        u16 *cache = codec->reg_cache;
-
-        BUG_ON(reg >= ARRAY_SIZE(wm8903_reg_defaults));
-
-        switch (reg) {
-        case WM8903_SW_RESET_AND_ID:
-        case WM8903_REVISION_NUMBER:
-                break;
-
-        default:
-                cache[reg] = value;
-                break;
-        }
-}
-
-static int wm8903_write(struct snd_soc_codec *codec, unsigned int reg,
-                        unsigned int value)
-{
-        u8 data[3];
-
-        wm8903_write_reg_cache(codec, reg, value);
-
-        /* Data format is 1 byte of address followed by 2 bytes of data */
-        data[0] = reg;
-        data[1] = (value >> 8) & 0xff;
-        data[2] = value & 0xff;
-
-        if (codec->hw_write(codec->control_data, data, 3) == 2)
                 return 0;
-        else
-                return -EIO;
+        }
 }
 
 static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
@@ -323,13 +247,13 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
         BUG_ON(start > 48);
 
         /* Enable the sequencer */
-        reg[0] = wm8903_read(codec, WM8903_WRITE_SEQUENCER_0);
+        reg[0] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_0);
         reg[0] |= WM8903_WSEQ_ENA;
-        wm8903_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]);
+        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]);
 
         dev_dbg(&i2c->dev, "Starting sequence at %d\n", start);
 
-        wm8903_write(codec, WM8903_WRITE_SEQUENCER_3,
+        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_3,
                      start | WM8903_WSEQ_START);
 
         /* Wait for it to complete.  If we have the interrupt wired up then
@@ -339,13 +263,13 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
         do {
                 msleep(10);
 
-                reg[4] = wm8903_read(codec, WM8903_WRITE_SEQUENCER_4);
+                reg[4] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_4);
         } while (reg[4] & WM8903_WSEQ_BUSY);
 
         dev_dbg(&i2c->dev, "Sequence complete\n");
 
         /* Disable the sequencer again */
-        wm8903_write(codec, WM8903_WRITE_SEQUENCER_0,
+        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0,
                      reg[0] & ~WM8903_WSEQ_ENA);
 
         return 0;
@@ -357,12 +281,12 @@ static void wm8903_sync_reg_cache(struct snd_soc_codec *codec, u16 *cache)
 
         /* There really ought to be something better we can do here :/ */
         for (i = 0; i < ARRAY_SIZE(wm8903_reg_defaults); i++)
-                cache[i] = wm8903_hw_read(codec, i);
+                cache[i] = codec->hw_read(codec, i);
 }
 
 static void wm8903_reset(struct snd_soc_codec *codec)
 {
-        wm8903_write(codec, WM8903_SW_RESET_AND_ID, 0);
+        snd_soc_write(codec, WM8903_SW_RESET_AND_ID, 0);
         memcpy(codec->reg_cache, wm8903_reg_defaults,
                sizeof(wm8903_reg_defaults));
 }
@@ -423,52 +347,52 @@ static int wm8903_output_event(struct snd_soc_dapm_widget *w,
         }
 
         if (event & SND_SOC_DAPM_PRE_PMU) {
-                val = wm8903_read(codec, reg);
+                val = snd_soc_read(codec, reg);
 
                 /* Short the output */
                 val &= ~(WM8903_OUTPUT_SHORT << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
         }
 
         if (event & SND_SOC_DAPM_POST_PMU) {
-                val = wm8903_read(codec, reg);
+                val = snd_soc_read(codec, reg);
 
                 val |= (WM8903_OUTPUT_IN << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
 
                 val |= (WM8903_OUTPUT_INT << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
 
                 /* Turn on the output ENA_OUTP */
                 val |= (WM8903_OUTPUT_OUT << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
 
                 /* Enable the DC servo */
-                dcs_reg = wm8903_read(codec, WM8903_DC_SERVO_0);
+                dcs_reg = snd_soc_read(codec, WM8903_DC_SERVO_0);
                 dcs_reg |= dcs_bit;
-                wm8903_write(codec, WM8903_DC_SERVO_0, dcs_reg);
+                snd_soc_write(codec, WM8903_DC_SERVO_0, dcs_reg);
 
                 /* Remove the short */
                 val |= (WM8903_OUTPUT_SHORT << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
         }
 
         if (event & SND_SOC_DAPM_PRE_PMD) {
-                val = wm8903_read(codec, reg);
+                val = snd_soc_read(codec, reg);
 
                 /* Short the output */
                 val &= ~(WM8903_OUTPUT_SHORT << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
 
                 /* Disable the DC servo */
-                dcs_reg = wm8903_read(codec, WM8903_DC_SERVO_0);
+                dcs_reg = snd_soc_read(codec, WM8903_DC_SERVO_0);
                 dcs_reg &= ~dcs_bit;
-                wm8903_write(codec, WM8903_DC_SERVO_0, dcs_reg);
+                snd_soc_write(codec, WM8903_DC_SERVO_0, dcs_reg);
 
                 /* Then disable the intermediate and output stages */
                 val &= ~((WM8903_OUTPUT_OUT | WM8903_OUTPUT_INT |
                           WM8903_OUTPUT_IN) << shift);
-                wm8903_write(codec, reg, val);
+                snd_soc_write(codec, reg, val);
         }
 
         return 0;
@@ -492,13 +416,13 @@ static int wm8903_class_w_put(struct snd_kcontrol *kcontrol,
         u16 reg;
         int ret;
 
-        reg = wm8903_read(codec, WM8903_CLASS_W_0);
+        reg = snd_soc_read(codec, WM8903_CLASS_W_0);
 
         /* Turn it off if we're about to enable bypass */
         if (ucontrol->value.integer.value[0]) {
                 if (wm8903->class_w_users == 0) {
                         dev_dbg(&i2c->dev, "Disabling Class W\n");
-                        wm8903_write(codec, WM8903_CLASS_W_0, reg &
+                        snd_soc_write(codec, WM8903_CLASS_W_0, reg &
                                      ~(WM8903_CP_DYN_FREQ | WM8903_CP_DYN_V));
                 }
                 wm8903->class_w_users++;
@@ -511,7 +435,7 @@ static int wm8903_class_w_put(struct snd_kcontrol *kcontrol,
         if (!ucontrol->value.integer.value[0]) {
                 if (wm8903->class_w_users == 1) {
                         dev_dbg(&i2c->dev, "Enabling Class W\n");
-                        wm8903_write(codec, WM8903_CLASS_W_0, reg |
+                        snd_soc_write(codec, WM8903_CLASS_W_0, reg |
                                      WM8903_CP_DYN_FREQ | WM8903_CP_DYN_V);
                 }
                 wm8903->class_w_users--;
@@ -1009,55 +933,55 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
         switch (level) {
         case SND_SOC_BIAS_ON:
         case SND_SOC_BIAS_PREPARE:
-                reg = wm8903_read(codec, WM8903_VMID_CONTROL_0);
+                reg = snd_soc_read(codec, WM8903_VMID_CONTROL_0);
                 reg &= ~(WM8903_VMID_RES_MASK);
                 reg |= WM8903_VMID_RES_50K;
-                wm8903_write(codec, WM8903_VMID_CONTROL_0, reg);
+                snd_soc_write(codec, WM8903_VMID_CONTROL_0, reg);
                 break;
 
         case SND_SOC_BIAS_STANDBY:
                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
-                        wm8903_write(codec, WM8903_CLOCK_RATES_2,
+                        snd_soc_write(codec, WM8903_CLOCK_RATES_2,
                                      WM8903_CLK_SYS_ENA);
 
                         /* Change DC servo dither level in startup sequence */
-                        wm8903_write(codec, WM8903_WRITE_SEQUENCER_0, 0x11);
-                        wm8903_write(codec, WM8903_WRITE_SEQUENCER_1, 0x1257);
-                        wm8903_write(codec, WM8903_WRITE_SEQUENCER_2, 0x2);
+                        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, 0x11);
+                        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_1, 0x1257);
+                        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_2, 0x2);
 
                         wm8903_run_sequence(codec, 0);
                         wm8903_sync_reg_cache(codec, codec->reg_cache);
 
                         /* Enable low impedence charge pump output */
-                        reg = wm8903_read(codec,
+                        reg = snd_soc_read(codec,
                                           WM8903_CONTROL_INTERFACE_TEST_1);
-                        wm8903_write(codec, WM8903_CONTROL_INTERFACE_TEST_1,
+                        snd_soc_write(codec, WM8903_CONTROL_INTERFACE_TEST_1,
                                      reg | WM8903_TEST_KEY);
-                        reg2 = wm8903_read(codec, WM8903_CHARGE_PUMP_TEST_1);
-                        wm8903_write(codec, WM8903_CHARGE_PUMP_TEST_1,
+                        reg2 = snd_soc_read(codec, WM8903_CHARGE_PUMP_TEST_1);
+                        snd_soc_write(codec, WM8903_CHARGE_PUMP_TEST_1,
                                      reg2 | WM8903_CP_SW_KELVIN_MODE_MASK);
-                        wm8903_write(codec, WM8903_CONTROL_INTERFACE_TEST_1,
+                        snd_soc_write(codec, WM8903_CONTROL_INTERFACE_TEST_1,
                                      reg);
 
                         /* By default no bypass paths are enabled so
                          * enable Class W support.
                          */
                         dev_dbg(&i2c->dev, "Enabling Class W\n");
-                        wm8903_write(codec, WM8903_CLASS_W_0, reg |
+                        snd_soc_write(codec, WM8903_CLASS_W_0, reg |
                                      WM8903_CP_DYN_FREQ | WM8903_CP_DYN_V);
                 }
 
-                reg = wm8903_read(codec, WM8903_VMID_CONTROL_0);
+                reg = snd_soc_read(codec, WM8903_VMID_CONTROL_0);
                 reg &= ~(WM8903_VMID_RES_MASK);
                 reg |= WM8903_VMID_RES_250K;
-                wm8903_write(codec, WM8903_VMID_CONTROL_0, reg);
+                snd_soc_write(codec, WM8903_VMID_CONTROL_0, reg);
                 break;
 
         case SND_SOC_BIAS_OFF:
                 wm8903_run_sequence(codec, 32);
-                reg = wm8903_read(codec, WM8903_CLOCK_RATES_2);
+                reg = snd_soc_read(codec, WM8903_CLOCK_RATES_2);
                 reg &= ~WM8903_CLK_SYS_ENA;
-                wm8903_write(codec, WM8903_CLOCK_RATES_2, reg);
+                snd_soc_write(codec, WM8903_CLOCK_RATES_2, reg);
                 break;
         }
 
@@ -1081,7 +1005,7 @@ static int wm8903_set_dai_fmt(struct snd_soc_dai *codec_dai,
                               unsigned int fmt)
 {
         struct snd_soc_codec *codec = codec_dai->codec;
-        u16 aif1 = wm8903_read(codec, WM8903_AUDIO_INTERFACE_1);
+        u16 aif1 = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_1);
 
         aif1 &= ~(WM8903_LRCLK_DIR | WM8903_BCLK_DIR | WM8903_AIF_FMT_MASK |
                   WM8903_AIF_LRCLK_INV | WM8903_AIF_BCLK_INV);
@@ -1159,7 +1083,7 @@ static int wm8903_set_dai_fmt(struct snd_soc_dai *codec_dai,
                 return -EINVAL;
         }
 
-        wm8903_write(codec, WM8903_AUDIO_INTERFACE_1, aif1);
+        snd_soc_write(codec, WM8903_AUDIO_INTERFACE_1, aif1);
 
         return 0;
 }
@@ -1169,14 +1093,14 @@ static int wm8903_digital_mute(struct snd_soc_dai *codec_dai, int mute)
         struct snd_soc_codec *codec = codec_dai->codec;
         u16 reg;
 
-        reg = wm8903_read(codec, WM8903_DAC_DIGITAL_1);
+        reg = snd_soc_read(codec, WM8903_DAC_DIGITAL_1);
 
         if (mute)
                 reg |= WM8903_DAC_MUTE;
         else
                 reg &= ~WM8903_DAC_MUTE;
 
-        wm8903_write(codec, WM8903_DAC_DIGITAL_1, reg);
+        snd_soc_write(codec, WM8903_DAC_DIGITAL_1, reg);
 
         return 0;
 }
@@ -1366,12 +1290,12 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream,
         int cur_val;
         int clk_sys;
 
-        u16 aif1 = wm8903_read(codec, WM8903_AUDIO_INTERFACE_1);
-        u16 aif2 = wm8903_read(codec, WM8903_AUDIO_INTERFACE_2);
-        u16 aif3 = wm8903_read(codec, WM8903_AUDIO_INTERFACE_3);
-        u16 clock0 = wm8903_read(codec, WM8903_CLOCK_RATES_0);
-        u16 clock1 = wm8903_read(codec, WM8903_CLOCK_RATES_1);
-        u16 dac_digital1 = wm8903_read(codec, WM8903_DAC_DIGITAL_1);
+        u16 aif1 = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_1);
+        u16 aif2 = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_2);
+        u16 aif3 = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_3);
+        u16 clock0 = snd_soc_read(codec, WM8903_CLOCK_RATES_0);
+        u16 clock1 = snd_soc_read(codec, WM8903_CLOCK_RATES_1);
+        u16 dac_digital1 = snd_soc_read(codec, WM8903_DAC_DIGITAL_1);
 
         if (substream == wm8903->slave_substream) {
                 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
@@ -1503,12 +1427,12 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream,
         aif2 |= bclk_divs[bclk_div].div;
         aif3 |= bclk / fs;
 
-        wm8903_write(codec, WM8903_CLOCK_RATES_0, clock0);
-        wm8903_write(codec, WM8903_CLOCK_RATES_1, clock1);
-        wm8903_write(codec, WM8903_AUDIO_INTERFACE_1, aif1);
-        wm8903_write(codec, WM8903_AUDIO_INTERFACE_2, aif2);
-        wm8903_write(codec, WM8903_AUDIO_INTERFACE_3, aif3);
-        wm8903_write(codec, WM8903_DAC_DIGITAL_1, dac_digital1);
+        snd_soc_write(codec, WM8903_CLOCK_RATES_0, clock0);
+        snd_soc_write(codec, WM8903_CLOCK_RATES_1, clock1);
+        snd_soc_write(codec, WM8903_AUDIO_INTERFACE_1, aif1);
+        snd_soc_write(codec, WM8903_AUDIO_INTERFACE_2, aif2);
+        snd_soc_write(codec, WM8903_AUDIO_INTERFACE_3, aif3);
+        snd_soc_write(codec, WM8903_DAC_DIGITAL_1, dac_digital1);
 
         return 0;
 }
@@ -1593,7 +1517,7 @@ static int wm8903_resume(struct platform_device *pdev)
         if (tmp_cache) {
                 for (i = 2; i < ARRAY_SIZE(wm8903_reg_defaults); i++)
                         if (tmp_cache[i] != reg_cache[i])
-                                wm8903_write(codec, i, tmp_cache[i]);
+                                snd_soc_write(codec, i, tmp_cache[i]);
         } else {
                 dev_err(&i2c->dev, "Failed to allocate temporary cache\n");
         }
@@ -1624,9 +1548,6 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
         codec->dev = &i2c->dev;
         codec->name = "WM8903";
         codec->owner = THIS_MODULE;
-        codec->read = wm8903_read;
-        codec->write = wm8903_write;
-        codec->hw_write = (hw_write_t)i2c_master_send;
         codec->bias_level = SND_SOC_BIAS_OFF;
         codec->set_bias_level = wm8903_set_bias_level;
         codec->dai = &wm8903_dai;
@@ -1634,18 +1555,25 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
         codec->reg_cache_size = ARRAY_SIZE(wm8903->reg_cache);
         codec->reg_cache = &wm8903->reg_cache[0];
         codec->private_data = wm8903;
+        codec->volatile_register = wm8903_volatile_register;
 
         i2c_set_clientdata(i2c, codec);
         codec->control_data = i2c;
 
-        val = wm8903_hw_read(codec, WM8903_SW_RESET_AND_ID);
+        ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
+        if (ret != 0) {
+                dev_err(&i2c->dev, "Failed to set cache I/O: %d\n", ret);
+                goto err;
+        }
+
+        val = snd_soc_read(codec, WM8903_SW_RESET_AND_ID);
         if (val != wm8903_reg_defaults[WM8903_SW_RESET_AND_ID]) {
                 dev_err(&i2c->dev,
                         "Device with ID register %x is not a WM8903\n", val);
                 return -ENODEV;
         }
 
-        val = wm8903_read(codec, WM8903_REVISION_NUMBER);
+        val = snd_soc_read(codec, WM8903_REVISION_NUMBER);
         dev_info(&i2c->dev, "WM8903 revision %d\n",
                  val & WM8903_CHIP_REV_MASK);
 
@@ -1655,35 +1583,35 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
         wm8903_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
         /* Latch volume update bits */
-        val = wm8903_read(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT);
+        val = snd_soc_read(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT);
         val |= WM8903_ADCVU;
-        wm8903_write(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT, val);
-        wm8903_write(codec, WM8903_ADC_DIGITAL_VOLUME_RIGHT, val);
+        snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT, val);
+        snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_RIGHT, val);
 
-        val = wm8903_read(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT);
+        val = snd_soc_read(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT);
         val |= WM8903_DACVU;
-        wm8903_write(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT, val);
-        wm8903_write(codec, WM8903_DAC_DIGITAL_VOLUME_RIGHT, val);
+        snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT, val);
+        snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_RIGHT, val);
 
-        val = wm8903_read(codec, WM8903_ANALOGUE_OUT1_LEFT);
+        val = snd_soc_read(codec, WM8903_ANALOGUE_OUT1_LEFT);
         val |= WM8903_HPOUTVU;
-        wm8903_write(codec, WM8903_ANALOGUE_OUT1_LEFT, val);
-        wm8903_write(codec, WM8903_ANALOGUE_OUT1_RIGHT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT1_LEFT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT1_RIGHT, val);
 
-        val = wm8903_read(codec, WM8903_ANALOGUE_OUT2_LEFT);
+        val = snd_soc_read(codec, WM8903_ANALOGUE_OUT2_LEFT);
         val |= WM8903_LINEOUTVU;
-        wm8903_write(codec, WM8903_ANALOGUE_OUT2_LEFT, val);
-        wm8903_write(codec, WM8903_ANALOGUE_OUT2_RIGHT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT2_LEFT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT2_RIGHT, val);
 
-        val = wm8903_read(codec, WM8903_ANALOGUE_OUT3_LEFT);
+        val = snd_soc_read(codec, WM8903_ANALOGUE_OUT3_LEFT);
         val |= WM8903_SPKVU;
-        wm8903_write(codec, WM8903_ANALOGUE_OUT3_LEFT, val);
-        wm8903_write(codec, WM8903_ANALOGUE_OUT3_RIGHT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT3_LEFT, val);
+        snd_soc_write(codec, WM8903_ANALOGUE_OUT3_RIGHT, val);
 
         /* Enable DAC soft mute by default */
-        val = wm8903_read(codec, WM8903_DAC_DIGITAL_1);
+        val = snd_soc_read(codec, WM8903_DAC_DIGITAL_1);
         val |= WM8903_DAC_MUTEMODE;
-        wm8903_write(codec, WM8903_DAC_DIGITAL_1, val);
+        snd_soc_write(codec, WM8903_DAC_DIGITAL_1, val);
 
         wm8903_dai.dev = &i2c->dev;
         wm8903_codec = codec;