+static int twl4030_voice_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ u8 infreq;
+ u8 mode;
+
+ /* If the system master clock is not 26MHz, the voice PCM interface is
+ * not avilable.
+ */
+ infreq = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL)
+ & TWL4030_APLL_INFREQ;
+
+ if (infreq != TWL4030_APLL_INFREQ_26000KHZ) {
+ printk(KERN_ERR "TWL4030 voice startup: "
+ "MCLK is not 26MHz, call set_sysclk() on init\n");
+ return -EINVAL;
+ }
+
+ /* If the codec mode is not option2, the voice PCM interface is not
+ * avilable.
+ */
+ mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE)
+ & TWL4030_OPT_MODE;
+
+ if (mode != TWL4030_OPTION_2) {
+ printk(KERN_ERR "TWL4030 voice startup: "
+ "the codec mode is not option2\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int twl4030_voice_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ u8 old_mode, mode;
+
+ /* bit rate */
+ old_mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE)
+ & ~(TWL4030_CODECPDZ);
+ mode = old_mode;
+
+ switch (params_rate(params)) {
+ case 8000:
+ mode &= ~(TWL4030_SEL_16K);
+ break;
+ case 16000:
+ mode |= TWL4030_SEL_16K;
+ break;
+ default:
+ printk(KERN_ERR "TWL4030 voice hw params: unknown rate %d\n",
+ params_rate(params));
+ return -EINVAL;
+ }
+
+ if (mode != old_mode) {
+ /* change rate and set CODECPDZ */
+ twl4030_codec_enable(codec, 0);
+ twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
+ twl4030_codec_enable(codec, 1);
+ }
+
+ return 0;
+}
+
+static int twl4030_voice_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u8 infreq;
+
+ switch (freq) {
+ case 26000000:
+ infreq = TWL4030_APLL_INFREQ_26000KHZ;
+ break;
+ default:
+ printk(KERN_ERR "TWL4030 voice set sysclk: unknown rate %d\n",
+ freq);
+ return -EINVAL;
+ }
+
+ infreq |= TWL4030_APLL_EN;
+ twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq);
+
+ return 0;
+}
+
+static int twl4030_voice_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u8 old_format, format;
+
+ /* get format */
+ old_format = twl4030_read_reg_cache(codec, TWL4030_REG_VOICE_IF);
+ format = old_format;
+
+ /* set master/slave audio interface */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFM:
+ format &= ~(TWL4030_VIF_SLAVE_EN);
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ format |= TWL4030_VIF_SLAVE_EN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_IB_NF:
+ format &= ~(TWL4030_VIF_FORMAT);
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ format |= TWL4030_VIF_FORMAT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (format != old_format) {
+ /* change format and set CODECPDZ */
+ twl4030_codec_enable(codec, 0);
+ twl4030_write(codec, TWL4030_REG_VOICE_IF, format);
+ twl4030_codec_enable(codec, 1);
+ }
+
+ return 0;
+}
+