/* * ALSA SoC Texas Instruments TLV320DAC33 codec driver * * Author: Peter Ujfalusi * * Copyright: (C) 2009 Nokia Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tlv320dac33.h" #define DAC33_BUFFER_SIZE_BYTES 24576 /* bytes, 12288 16 bit words, * 6144 stereo */ #define DAC33_BUFFER_SIZE_SAMPLES 6144 #define NSAMPLE_MAX 5700 #define LATENCY_TIME_MS 20 static struct snd_soc_codec *tlv320dac33_codec; enum dac33_state { DAC33_IDLE = 0, DAC33_PREFILL, DAC33_PLAYBACK, DAC33_FLUSH, }; enum dac33_fifo_modes { DAC33_FIFO_BYPASS = 0, DAC33_FIFO_MODE1, DAC33_FIFO_MODE7, DAC33_FIFO_LAST_MODE, }; #define DAC33_NUM_SUPPLIES 3 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = { "AVDD", "DVDD", "IOVDD", }; struct tlv320dac33_priv { struct mutex mutex; struct workqueue_struct *dac33_wq; struct work_struct work; struct snd_soc_codec codec; struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES]; int power_gpio; int chip_power; int irq; unsigned int refclk; unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */ unsigned int nsample_min; /* nsample should not be lower than * this */ unsigned int nsample_max; /* nsample should not be higher than * this */ enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */ unsigned int nsample; /* burst read amount from host */ u8 burst_bclkdiv; /* BCLK divider value in burst mode */ enum dac33_state state; }; static const u8 dac33_reg[DAC33_CACHEREGNUM] = { 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */ 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */ 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */ 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */ 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */ 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */ 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */ 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */ 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */ 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */ 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */ 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */ 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */ 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */ 0x00, 0x00, /* 0x38 - 0x39 */ /* Registers 0x3a - 0x3f are reserved */ 0x00, 0x00, /* 0x3a - 0x3b */ 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */ 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */ 0x00, 0x80, /* 0x44 - 0x45 */ /* Registers 0x46 - 0x47 are reserved */ 0x80, 0x80, /* 0x46 - 0x47 */ 0x80, 0x00, 0x00, /* 0x48 - 0x4a */ /* Registers 0x4b - 0x7c are reserved */ 0x00, /* 0x4b */ 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */ 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */ 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */ 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */ 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */ 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */ 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */ 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */ 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */ 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */ 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */ 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */ 0x00, /* 0x7c */ 0xda, 0x33, 0x03, /* 0x7d - 0x7f */ }; /* Register read and write */ static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec, unsigned reg) { u8 *cache = codec->reg_cache; if (reg >= DAC33_CACHEREGNUM) return 0; return cache[reg]; } static inline void dac33_write_reg_cache(struct snd_soc_codec *codec, u8 reg, u8 value) { u8 *cache = codec->reg_cache; if (reg >= DAC33_CACHEREGNUM) return; cache[reg] = value; } static int dac33_read(struct snd_soc_codec *codec, unsigned int reg, u8 *value) { struct tlv320dac33_priv *dac33 = codec->private_data; int val; *value = reg & 0xff; /* If powered off, return the cached value */ if (dac33->chip_power) { val = i2c_smbus_read_byte_data(codec->control_data, value[0]); if (val < 0) { dev_err(codec->dev, "Read failed (%d)\n", val); value[0] = dac33_read_reg_cache(codec, reg); } else { value[0] = val; dac33_write_reg_cache(codec, reg, val); } } else { value[0] = dac33_read_reg_cache(codec, reg); } return 0; } static int dac33_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { struct tlv320dac33_priv *dac33 = codec->private_data; u8 data[2]; int ret = 0; /* * data is * D15..D8 dac33 register offset * D7...D0 register data */ data[0] = reg & 0xff; data[1] = value & 0xff; dac33_write_reg_cache(codec, data[0], data[1]); if (dac33->chip_power) { ret = codec->hw_write(codec->control_data, data, 2); if (ret != 2) dev_err(codec->dev, "Write failed (%d)\n", ret); else ret = 0; } return ret; } static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { struct tlv320dac33_priv *dac33 = codec->private_data; int ret; mutex_lock(&dac33->mutex); ret = dac33_write(codec, reg, value); mutex_unlock(&dac33->mutex); return ret; } #define DAC33_I2C_ADDR_AUTOINC 0x80 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { struct tlv320dac33_priv *dac33 = codec->private_data; u8 data[3]; int ret = 0; /* * data is * D23..D16 dac33 register offset * D15..D8 register data MSB * D7...D0 register data LSB */ data[0] = reg & 0xff; data[1] = (value >> 8) & 0xff; data[2] = value & 0xff; dac33_write_reg_cache(codec, data[0], data[1]); dac33_write_reg_cache(codec, data[0] + 1, data[2]); if (dac33->chip_power) { /* We need to set autoincrement mode for 16 bit writes */ data[0] |= DAC33_I2C_ADDR_AUTOINC; ret = codec->hw_write(codec->control_data, data, 3); if (ret != 3) dev_err(codec->dev, "Write failed (%d)\n", ret); else ret = 0; } return ret; } static void dac33_restore_regs(struct snd_soc_codec *codec) { struct tlv320dac33_priv *dac33 = codec->private_data; u8 *cache = codec->reg_cache; u8 data[2]; int i, ret; if (!dac33->chip_power) return; for (i = DAC33_PWR_CTRL; i <= DAC33_INTP_CTRL_B; i++) { data[0] = i; data[1] = cache[i]; /* Skip the read only registers */ if ((i >= DAC33_INT_OSC_STATUS && i <= DAC33_INT_OSC_FREQ_RAT_READ_B) || (i >= DAC33_FIFO_WPTR_MSB && i <= DAC33_FIFO_IRQ_FLAG) || i == DAC33_DAC_STATUS_FLAGS || i == DAC33_SRC_EST_REF_CLK_RATIO_A || i == DAC33_SRC_EST_REF_CLK_RATIO_B) continue; ret = codec->hw_write(codec->control_data, data, 2); if (ret != 2) dev_err(codec->dev, "Write failed (%d)\n", ret); } for (i = DAC33_LDAC_PWR_CTRL; i <= DAC33_LINEL_TO_LLO_VOL; i++) { data[0] = i; data[1] = cache[i]; ret = codec->hw_write(codec->control_data, data, 2); if (ret != 2) dev_err(codec->dev, "Write failed (%d)\n", ret); } for (i = DAC33_LINER_TO_RLO_VOL; i <= DAC33_OSC_TRIM; i++) { data[0] = i; data[1] = cache[i]; ret = codec->hw_write(codec->control_data, data, 2); if (ret != 2) dev_err(codec->dev, "Write failed (%d)\n", ret); } } static inline void dac33_soft_power(struct snd_soc_codec *codec, int power) { u8 reg; reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); if (power) reg |= DAC33_PDNALLB; else reg &= ~DAC33_PDNALLB; dac33_write(codec, DAC33_PWR_CTRL, reg); } static int dac33_hard_power(struct snd_soc_codec *codec, int power) { struct tlv320dac33_priv *dac33 = codec->private_data; int ret; mutex_lock(&dac33->mutex); if (power) { ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies), dac33->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); goto exit; } if (dac33->power_gpio >= 0) gpio_set_value(dac33->power_gpio, 1); dac33->chip_power = 1; /* Restore registers */ dac33_restore_regs(codec); dac33_soft_power(codec, 1); } else { dac33_soft_power(codec, 0); if (dac33->power_gpio >= 0) gpio_set_value(dac33->power_gpio, 0); ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to disable supplies: %d\n", ret); goto exit; } dac33->chip_power = 0; } exit: mutex_unlock(&dac33->mutex); return ret; } static int dac33_get_nsample(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct tlv320dac33_priv *dac33 = codec->private_data; ucontrol->value.integer.value[0] = dac33->nsample; return 0; } static int dac33_set_nsample(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct tlv320dac33_priv *dac33 = codec->private_data; int ret = 0; if (dac33->nsample == ucontrol->value.integer.value[0]) return 0; if (ucontrol->value.integer.value[0] < dac33->nsample_min || ucontrol->value.integer.value[0] > dac33->nsample_max) ret = -EINVAL; else dac33->nsample = ucontrol->value.integer.value[0]; return ret; } static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct tlv320dac33_priv *dac33 = codec->private_data; ucontrol->value.integer.value[0] = dac33->fifo_mode; return 0; } static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct tlv320dac33_priv *dac33 = codec->private_data; int ret = 0; if (dac33->fifo_mode == ucontrol->value.integer.value[0]) return 0; /* Do not allow changes while stream is running*/ if (codec->active) return -EPERM; if (ucontrol->value.integer.value[0] < 0 || ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE) ret = -EINVAL; else dac33->fifo_mode = ucontrol->value.integer.value[0]; return ret; } /* Codec operation modes */ static const char *dac33_fifo_mode_texts[] = { "Bypass", "Mode 1", "Mode 7" }; static const struct soc_enum dac33_fifo_mode_enum = SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts), dac33_fifo_mode_texts); /* * DACL/R digital volume control: * from 0 dB to -63.5 in 0.5 dB steps * Need to be inverted later on: * 0x00 == 0 dB * 0x7f == -63.5 dB */ static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0); static const struct snd_kcontrol_new dac33_snd_controls[] = { SOC_DOUBLE_R_TLV("DAC Digital Playback Volume", DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 0, 0x7f, 1, dac_digivol_tlv), SOC_DOUBLE_R("DAC Digital Playback Switch", DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1), SOC_DOUBLE_R("Line to Line Out Volume", DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1), }; static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = { SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0, dac33_get_nsample, dac33_set_nsample), SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum, dac33_get_fifo_mode, dac33_set_fifo_mode), }; /* Analog bypass */ static const struct snd_kcontrol_new dac33_dapm_abypassl_control = SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1); static const struct snd_kcontrol_new dac33_dapm_abypassr_control = SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1); static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = { SND_SOC_DAPM_OUTPUT("LEFT_LO"), SND_SOC_DAPM_OUTPUT("RIGHT_LO"), SND_SOC_DAPM_INPUT("LINEL"), SND_SOC_DAPM_INPUT("LINER"), SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0), SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0), /* Analog bypass */ SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0, &dac33_dapm_abypassl_control), SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0, &dac33_dapm_abypassr_control), SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power", DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0), SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power", DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0), }; static const struct snd_soc_dapm_route audio_map[] = { /* Analog bypass */ {"Analog Left Bypass", "Switch", "LINEL"}, {"Analog Right Bypass", "Switch", "LINER"}, {"Output Left Amp Power", NULL, "DACL"}, {"Output Right Amp Power", NULL, "DACR"}, {"Output Left Amp Power", NULL, "Analog Left Bypass"}, {"Output Right Amp Power", NULL, "Analog Right Bypass"}, /* output */ {"LEFT_LO", NULL, "Output Left Amp Power"}, {"RIGHT_LO", NULL, "Output Right Amp Power"}, }; static int dac33_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, dac33_dapm_widgets, ARRAY_SIZE(dac33_dapm_widgets)); /* set up audio path interconnects */ snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); return 0; } static int dac33_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { int ret; switch (level) { case SND_SOC_BIAS_ON: dac33_soft_power(codec, 1); break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: if (codec->bias_level == SND_SOC_BIAS_OFF) { ret = dac33_hard_power(codec, 1); if (ret != 0) return ret; } dac33_soft_power(codec, 0); break; case SND_SOC_BIAS_OFF: ret = dac33_hard_power(codec, 0); if (ret != 0) return ret; break; } codec->bias_level = level; return 0; } static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33) { struct snd_soc_codec *codec; codec = &dac33->codec; switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: dac33_write16(codec, DAC33_NSAMPLE_MSB, DAC33_THRREG(dac33->nsample)); dac33_write16(codec, DAC33_PREFILL_MSB, DAC33_THRREG(dac33->alarm_threshold)); break; case DAC33_FIFO_MODE7: dac33_write16(codec, DAC33_PREFILL_MSB, DAC33_THRREG(10)); break; default: dev_warn(codec->dev, "Unhandled FIFO mode: %d\n", dac33->fifo_mode); break; } } static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33) { struct snd_soc_codec *codec; codec = &dac33->codec; switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: dac33_write16(codec, DAC33_NSAMPLE_MSB, DAC33_THRREG(dac33->nsample)); break; case DAC33_FIFO_MODE7: /* At the moment we are not using interrupts in mode7 */ break; default: dev_warn(codec->dev, "Unhandled FIFO mode: %d\n", dac33->fifo_mode); break; } } static void dac33_work(struct work_struct *work) { struct snd_soc_codec *codec; struct tlv320dac33_priv *dac33; u8 reg; dac33 = container_of(work, struct tlv320dac33_priv, work); codec = &dac33->codec; mutex_lock(&dac33->mutex); switch (dac33->state) { case DAC33_PREFILL: dac33->state = DAC33_PLAYBACK; dac33_prefill_handler(dac33); break; case DAC33_PLAYBACK: dac33_playback_handler(dac33); break; case DAC33_IDLE: break; case DAC33_FLUSH: dac33->state = DAC33_IDLE; /* Mask all interrupts from dac33 */ dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0); /* flush fifo */ reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A); reg |= DAC33_FIFOFLUSH; dac33_write(codec, DAC33_FIFO_CTRL_A, reg); break; } mutex_unlock(&dac33->mutex); } static irqreturn_t dac33_interrupt_handler(int irq, void *dev) { struct snd_soc_codec *codec = dev; struct tlv320dac33_priv *dac33 = codec->private_data; queue_work(dac33->dac33_wq, &dac33->work); return IRQ_HANDLED; } static void dac33_shutdown(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; struct tlv320dac33_priv *dac33 = codec->private_data; unsigned int pwr_ctrl; /* Stop pending workqueue */ if (dac33->fifo_mode) cancel_work_sync(&dac33->work); mutex_lock(&dac33->mutex); pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); pwr_ctrl &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB); dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl); mutex_unlock(&dac33->mutex); } static void dac33_oscwait(struct snd_soc_codec *codec) { int timeout = 20; u8 reg; do { msleep(1); dac33_read(codec, DAC33_INT_OSC_STATUS, ®); } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--); if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) dev_err(codec->dev, "internal oscillator calibration failed\n"); } static int dac33_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; /* Check parameters for validity */ switch (params_rate(params)) { case 44100: case 48000: break; default: dev_err(codec->dev, "unsupported rate %d\n", params_rate(params)); return -EINVAL; } switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; default: dev_err(codec->dev, "unsupported format %d\n", params_format(params)); return -EINVAL; } return 0; } #define CALC_OSCSET(rate, refclk) ( \ ((((rate * 10000) / refclk) * 4096) + 5000) / 10000) #define CALC_RATIOSET(rate, refclk) ( \ ((((refclk * 100000) / rate) * 16384) + 50000) / 100000) /* * tlv320dac33 is strict on the sequence of the register writes, if the register * writes happens in different order, than dac33 might end up in unknown state. * Use the known, working sequence of register writes to initialize the dac33. */ static int dac33_prepare_chip(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; struct tlv320dac33_priv *dac33 = codec->private_data; unsigned int oscset, ratioset, pwr_ctrl, reg_tmp; u8 aictrl_a, aictrl_b, fifoctrl_a; switch (substream->runtime->rate) { case 44100: case 48000: oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk); ratioset = CALC_RATIOSET(substream->runtime->rate, dac33->refclk); break; default: dev_err(codec->dev, "unsupported rate %d\n", substream->runtime->rate); return -EINVAL; } aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A); aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK); fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A); fifoctrl_a &= ~DAC33_WIDTH; switch (substream->runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16); fifoctrl_a |= DAC33_WIDTH; break; default: dev_err(codec->dev, "unsupported format %d\n", substream->runtime->format); return -EINVAL; } mutex_lock(&dac33->mutex); dac33_soft_power(codec, 1); reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL); dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp); /* Write registers 0x08 and 0x09 (MSB, LSB) */ dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset); /* calib time: 128 is a nice number ;) */ dac33_write(codec, DAC33_CALIB_TIME, 128); /* adjustment treshold & step */ dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) | DAC33_ADJSTEP(1)); /* div=4 / gain=1 / div */ dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4)); pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB; dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl); dac33_oscwait(codec); if (dac33->fifo_mode) { /* Generic for all FIFO modes */ /* 50-51 : ASRC Control registers */ dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */ dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */ /* Write registers 0x34 and 0x35 (MSB, LSB) */ dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset); /* Set interrupts to high active */ dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH); } else { /* FIFO bypass mode */ /* 50-51 : ASRC Control registers */ dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP); dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */ } /* Interrupt behaviour configuration */ switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: dac33_write(codec, DAC33_FIFO_IRQ_MODE_B, DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL)); dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT); break; case DAC33_FIFO_MODE7: /* Disable all interrupts */ dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0); break; default: /* in FIFO bypass mode, the interrupts are not used */ break; } aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B); switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: /* * For mode1: * Disable the FIFO bypass (Enable the use of FIFO) * Select nSample mode * BCLK is only running when data is needed by DAC33 */ fifoctrl_a &= ~DAC33_FBYPAS; fifoctrl_a &= ~DAC33_FAUTO; aictrl_b &= ~DAC33_BCLKON; break; case DAC33_FIFO_MODE7: /* * For mode1: * Disable the FIFO bypass (Enable the use of FIFO) * Select Threshold mode * BCLK is only running when data is needed by DAC33 */ fifoctrl_a &= ~DAC33_FBYPAS; fifoctrl_a |= DAC33_FAUTO; aictrl_b &= ~DAC33_BCLKON; break; default: /* * For FIFO bypass mode: * Enable the FIFO bypass (Disable the FIFO use) * Set the BCLK as continous */ fifoctrl_a |= DAC33_FBYPAS; aictrl_b |= DAC33_BCLKON; break; } dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a); dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a); dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b); /* * BCLK divide ratio * 0: 1.5 * 1: 1 * 2: 2 * ... * 254: 254 * 255: 255 */ if (dac33->fifo_mode) dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, dac33->burst_bclkdiv); else dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32); switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: dac33_write16(codec, DAC33_ATHR_MSB, DAC33_THRREG(dac33->alarm_threshold)); break; case DAC33_FIFO_MODE7: /* * Configure the threshold levels, and leave 10 sample space * at the bottom, and also at the top of the FIFO */ dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(DAC33_BUFFER_SIZE_SAMPLES - 10)); dac33_write16(codec, DAC33_LTHR_MSB, DAC33_THRREG(10)); break; default: break; } mutex_unlock(&dac33->mutex); return 0; } static void dac33_calculate_times(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; struct tlv320dac33_priv *dac33 = codec->private_data; unsigned int nsample_limit; /* Number of samples (16bit, stereo) in one period */ dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4; /* Number of samples (16bit, stereo) in ALSA buffer */ dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4; /* Subtract one period from the total */ dac33->nsample_max -= dac33->nsample_min; /* Number of samples for LATENCY_TIME_MS / 2 */ dac33->alarm_threshold = substream->runtime->rate / (1000 / (LATENCY_TIME_MS / 2)); /* Find and fix up the lowest nsmaple limit */ nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS); if (dac33->nsample_min < nsample_limit) dac33->nsample_min = nsample_limit; if (dac33->nsample < dac33->nsample_min) dac33->nsample = dac33->nsample_min; /* * Find and fix up the highest nsmaple limit * In order to not overflow the DAC33 buffer substract the * alarm_threshold value from the size of the DAC33 buffer */ nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold; if (dac33->nsample_max > nsample_limit) dac33->nsample_max = nsample_limit; if (dac33->nsample > dac33->nsample_max) dac33->nsample = dac33->nsample_max; } static int dac33_pcm_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { dac33_calculate_times(substream); dac33_prepare_chip(substream); return 0; } static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd, 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; struct tlv320dac33_priv *dac33 = codec->private_data; int ret = 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: if (dac33->fifo_mode) { dac33->state = DAC33_PREFILL; queue_work(dac33->dac33_wq, &dac33->work); } break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: if (dac33->fifo_mode) { dac33->state = DAC33_FLUSH; queue_work(dac33->dac33_wq, &dac33->work); } break; default: ret = -EINVAL; } return ret; } static int dac33_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; struct tlv320dac33_priv *dac33 = codec->private_data; u8 ioc_reg, asrcb_reg; ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL); asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B); switch (clk_id) { case TLV320DAC33_MCLK: ioc_reg |= DAC33_REFSEL; asrcb_reg |= DAC33_SRCREFSEL; break; case TLV320DAC33_SLEEPCLK: ioc_reg &= ~DAC33_REFSEL; asrcb_reg &= ~DAC33_SRCREFSEL; break; default: dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id); break; } dac33->refclk = freq; dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg); dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg); return 0; } static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; struct tlv320dac33_priv *dac33 = codec->private_data; u8 aictrl_a, aictrl_b; aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A); aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B); /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master */ aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK); break; case SND_SOC_DAIFMT_CBS_CFS: /* Codec Slave */ if (dac33->fifo_mode) { dev_err(codec->dev, "FIFO mode requires master mode\n"); return -EINVAL; } else aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK); break; default: return -EINVAL; } aictrl_a &= ~DAC33_AFMT_MASK; switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: aictrl_a |= DAC33_AFMT_I2S; break; case SND_SOC_DAIFMT_DSP_A: aictrl_a |= DAC33_AFMT_DSP; aictrl_b &= ~DAC33_DATA_DELAY_MASK; aictrl_b |= DAC33_DATA_DELAY(1); /* 1 bit delay */ break; case SND_SOC_DAIFMT_DSP_B: aictrl_a |= DAC33_AFMT_DSP; aictrl_b &= ~DAC33_DATA_DELAY_MASK; /* No delay */ break; case SND_SOC_DAIFMT_RIGHT_J: aictrl_a |= DAC33_AFMT_RIGHT_J; break; case SND_SOC_DAIFMT_LEFT_J: aictrl_a |= DAC33_AFMT_LEFT_J; break; default: dev_err(codec->dev, "Unsupported format (%u)\n", fmt & SND_SOC_DAIFMT_FORMAT_MASK); return -EINVAL; } dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a); dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b); return 0; } static void dac33_init_chip(struct snd_soc_codec *codec) { /* 44-46: DAC Control Registers */ /* A : DAC sample rate Fsref/1.5 */ dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(1)); /* B : DAC src=normal, not muted */ dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT | DAC33_DACSRCL_LEFT); /* C : (defaults) */ dac33_write(codec, DAC33_DAC_CTRL_C, 0x00); /* 64-65 : L&R DAC power control Line In -> OUT 1V/V Gain, DAC -> OUT 4V/V Gain*/ dac33_write(codec, DAC33_LDAC_PWR_CTRL, DAC33_LROUT_GAIN(2)); dac33_write(codec, DAC33_RDAC_PWR_CTRL, DAC33_LROUT_GAIN(2)); /* 73 : volume soft stepping control, clock source = internal osc (?) */ dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN); /* 66 : LOP/LOM Modes */ dac33_write(codec, DAC33_OUT_AMP_CM_CTRL, 0xff); /* 68 : LOM inverted from LOP */ dac33_write(codec, DAC33_OUT_AMP_CTRL, (3<<2)); dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB); } static int dac33_soc_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; struct tlv320dac33_priv *dac33; int ret = 0; BUG_ON(!tlv320dac33_codec); codec = tlv320dac33_codec; socdev->card->codec = codec; dac33 = codec->private_data; /* Power up the codec */ dac33_hard_power(codec, 1); /* Set default configuration */ dac33_init_chip(codec); /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { dev_err(codec->dev, "failed to create pcms\n"); goto pcm_err; } snd_soc_add_controls(codec, dac33_snd_controls, ARRAY_SIZE(dac33_snd_controls)); /* Only add the nSample controls, if we have valid IRQ number */ if (dac33->irq >= 0) snd_soc_add_controls(codec, dac33_nsample_snd_controls, ARRAY_SIZE(dac33_nsample_snd_controls)); dac33_add_widgets(codec); /* power on device */ dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY); /* Bias level configuration has enabled regulator an extra time */ regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies); return 0; pcm_err: dac33_hard_power(codec, 0); return ret; } static int dac33_soc_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; dac33_set_bias_level(codec, SND_SOC_BIAS_OFF); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); return 0; } static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; dac33_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int dac33_soc_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY); dac33_set_bias_level(codec, codec->suspend_bias_level); return 0; } struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = { .probe = dac33_soc_probe, .remove = dac33_soc_remove, .suspend = dac33_soc_suspend, .resume = dac33_soc_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33); #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000) #define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE static struct snd_soc_dai_ops dac33_dai_ops = { .shutdown = dac33_shutdown, .hw_params = dac33_hw_params, .prepare = dac33_pcm_prepare, .trigger = dac33_pcm_trigger, .set_sysclk = dac33_set_dai_sysclk, .set_fmt = dac33_set_dai_fmt, }; struct snd_soc_dai dac33_dai = { .name = "tlv320dac33", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = DAC33_RATES, .formats = DAC33_FORMATS,}, .ops = &dac33_dai_ops, }; EXPORT_SYMBOL_GPL(dac33_dai); static int __devinit dac33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tlv320dac33_platform_data *pdata; struct tlv320dac33_priv *dac33; struct snd_soc_codec *codec; int ret, i; if (client->dev.platform_data == NULL) { dev_err(&client->dev, "Platform data not set\n"); return -ENODEV; } pdata = client->dev.platform_data; dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL); if (dac33 == NULL) return -ENOMEM; codec = &dac33->codec; codec->private_data = dac33; codec->control_data = client; mutex_init(&codec->mutex); mutex_init(&dac33->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); codec->name = "tlv320dac33"; codec->owner = THIS_MODULE; codec->read = dac33_read_reg_cache; codec->write = dac33_write_locked; codec->hw_write = (hw_write_t) i2c_master_send; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = dac33_set_bias_level; codec->dai = &dac33_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(dac33_reg); codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg), GFP_KERNEL); if (codec->reg_cache == NULL) { ret = -ENOMEM; goto error_reg; } i2c_set_clientdata(client, dac33); dac33->power_gpio = pdata->power_gpio; dac33->burst_bclkdiv = pdata->burst_bclkdiv; dac33->irq = client->irq; dac33->nsample = NSAMPLE_MAX; /* Disable FIFO use by default */ dac33->fifo_mode = DAC33_FIFO_BYPASS; tlv320dac33_codec = codec; codec->dev = &client->dev; dac33_dai.dev = codec->dev; /* Check if the reset GPIO number is valid and request it */ if (dac33->power_gpio >= 0) { ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset"); if (ret < 0) { dev_err(codec->dev, "Failed to request reset GPIO (%d)\n", dac33->power_gpio); snd_soc_unregister_dai(&dac33_dai); snd_soc_unregister_codec(codec); goto error_gpio; } gpio_direction_output(dac33->power_gpio, 0); } else { dac33->chip_power = 1; } /* Check if the IRQ number is valid and request it */ if (dac33->irq >= 0) { ret = request_irq(dac33->irq, dac33_interrupt_handler, IRQF_TRIGGER_RISING | IRQF_DISABLED, codec->name, codec); if (ret < 0) { dev_err(codec->dev, "Could not request IRQ%d (%d)\n", dac33->irq, ret); dac33->irq = -1; } if (dac33->irq != -1) { /* Setup work queue */ dac33->dac33_wq = create_singlethread_workqueue("tlv320dac33"); if (dac33->dac33_wq == NULL) { free_irq(dac33->irq, &dac33->codec); ret = -ENOMEM; goto error_wq; } INIT_WORK(&dac33->work, dac33_work); } } for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++) dac33->supplies[i].supply = dac33_supply_names[i]; ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(dac33->supplies), dac33->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to request supplies: %d\n", ret); goto err_get; } ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies), dac33->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); goto err_enable; } ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); goto error_codec; } ret = snd_soc_register_dai(&dac33_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); goto error_codec; } /* Shut down the codec for now */ dac33_hard_power(codec, 0); return ret; error_codec: regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies); err_enable: regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies); err_get: if (dac33->irq >= 0) { free_irq(dac33->irq, &dac33->codec); destroy_workqueue(dac33->dac33_wq); } error_wq: if (dac33->power_gpio >= 0) gpio_free(dac33->power_gpio); error_gpio: kfree(codec->reg_cache); error_reg: tlv320dac33_codec = NULL; kfree(dac33); return ret; } static int __devexit dac33_i2c_remove(struct i2c_client *client) { struct tlv320dac33_priv *dac33; dac33 = i2c_get_clientdata(client); dac33_hard_power(&dac33->codec, 0); if (dac33->power_gpio >= 0) gpio_free(dac33->power_gpio); if (dac33->irq >= 0) free_irq(dac33->irq, &dac33->codec); regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies); destroy_workqueue(dac33->dac33_wq); snd_soc_unregister_dai(&dac33_dai); snd_soc_unregister_codec(&dac33->codec); kfree(dac33->codec.reg_cache); kfree(dac33); tlv320dac33_codec = NULL; return 0; } static const struct i2c_device_id tlv320dac33_i2c_id[] = { { .name = "tlv320dac33", .driver_data = 0, }, { }, }; static struct i2c_driver tlv320dac33_i2c_driver = { .driver = { .name = "tlv320dac33", .owner = THIS_MODULE, }, .probe = dac33_i2c_probe, .remove = __devexit_p(dac33_i2c_remove), .id_table = tlv320dac33_i2c_id, }; static int __init dac33_module_init(void) { int r; r = i2c_add_driver(&tlv320dac33_i2c_driver); if (r < 0) { printk(KERN_ERR "DAC33: driver registration failed\n"); return r; } return 0; } module_init(dac33_module_init); static void __exit dac33_module_exit(void) { i2c_del_driver(&tlv320dac33_i2c_driver); } module_exit(dac33_module_exit); MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver"); MODULE_AUTHOR("Peter Ujfalusi "); MODULE_LICENSE("GPL");