| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* Atmel PDMIC driver |
| * |
| * Copyright (C) 2015 Atmel |
| * |
| * Author: Songjun Wu <songjun.wu@atmel.com> |
| */ |
| |
| #include <linux/of.h> |
| #include <linux/clk.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <sound/core.h> |
| #include <sound/dmaengine_pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/tlv.h> |
| #include "atmel-pdmic.h" |
| |
| struct atmel_pdmic_pdata { |
| u32 mic_min_freq; |
| u32 mic_max_freq; |
| s32 mic_offset; |
| const char *card_name; |
| }; |
| |
| struct atmel_pdmic { |
| dma_addr_t phy_base; |
| struct regmap *regmap; |
| struct clk *pclk; |
| struct clk *gclk; |
| struct device *dev; |
| int irq; |
| struct snd_pcm_substream *substream; |
| const struct atmel_pdmic_pdata *pdata; |
| }; |
| |
| static const struct of_device_id atmel_pdmic_of_match[] = { |
| { |
| .compatible = "atmel,sama5d2-pdmic", |
| }, { |
| /* sentinel */ |
| } |
| }; |
| MODULE_DEVICE_TABLE(of, atmel_pdmic_of_match); |
| |
| #define PDMIC_OFFSET_MAX_VAL S16_MAX |
| #define PDMIC_OFFSET_MIN_VAL S16_MIN |
| |
| static struct atmel_pdmic_pdata *atmel_pdmic_dt_init(struct device *dev) |
| { |
| struct device_node *np = dev->of_node; |
| struct atmel_pdmic_pdata *pdata; |
| |
| if (!np) { |
| dev_err(dev, "device node not found\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| if (!pdata) |
| return ERR_PTR(-ENOMEM); |
| |
| if (of_property_read_string(np, "atmel,model", &pdata->card_name)) |
| pdata->card_name = "PDMIC"; |
| |
| if (of_property_read_u32(np, "atmel,mic-min-freq", |
| &pdata->mic_min_freq)) { |
| dev_err(dev, "failed to get mic-min-freq\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (of_property_read_u32(np, "atmel,mic-max-freq", |
| &pdata->mic_max_freq)) { |
| dev_err(dev, "failed to get mic-max-freq\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (pdata->mic_max_freq < pdata->mic_min_freq) { |
| dev_err(dev, |
| "mic-max-freq should not be less than mic-min-freq\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (of_property_read_s32(np, "atmel,mic-offset", &pdata->mic_offset)) |
| pdata->mic_offset = 0; |
| |
| if (pdata->mic_offset > PDMIC_OFFSET_MAX_VAL) { |
| dev_warn(dev, |
| "mic-offset value %d is larger than the max value %d, the max value is specified\n", |
| pdata->mic_offset, PDMIC_OFFSET_MAX_VAL); |
| pdata->mic_offset = PDMIC_OFFSET_MAX_VAL; |
| } else if (pdata->mic_offset < PDMIC_OFFSET_MIN_VAL) { |
| dev_warn(dev, |
| "mic-offset value %d is less than the min value %d, the min value is specified\n", |
| pdata->mic_offset, PDMIC_OFFSET_MIN_VAL); |
| pdata->mic_offset = PDMIC_OFFSET_MIN_VAL; |
| } |
| |
| return pdata; |
| } |
| |
| /* cpu dai component */ |
| static int atmel_pdmic_cpu_dai_startup(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); |
| int ret; |
| |
| ret = clk_prepare_enable(dd->gclk); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(dd->pclk); |
| if (ret) { |
| clk_disable_unprepare(dd->gclk); |
| return ret; |
| } |
| |
| /* Clear all bits in the Control Register(PDMIC_CR) */ |
| regmap_write(dd->regmap, PDMIC_CR, 0); |
| |
| dd->substream = substream; |
| |
| /* Enable the overrun error interrupt */ |
| regmap_write(dd->regmap, PDMIC_IER, PDMIC_IER_OVRE); |
| |
| return 0; |
| } |
| |
| static void atmel_pdmic_cpu_dai_shutdown(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); |
| |
| /* Disable the overrun error interrupt */ |
| regmap_write(dd->regmap, PDMIC_IDR, PDMIC_IDR_OVRE); |
| |
| clk_disable_unprepare(dd->gclk); |
| clk_disable_unprepare(dd->pclk); |
| } |
| |
| static int atmel_pdmic_cpu_dai_prepare(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); |
| u32 val; |
| |
| /* Clean the PDMIC Converted Data Register */ |
| return regmap_read(dd->regmap, PDMIC_CDR, &val); |
| } |
| |
| static const struct snd_soc_dai_ops atmel_pdmic_cpu_dai_ops = { |
| .startup = atmel_pdmic_cpu_dai_startup, |
| .shutdown = atmel_pdmic_cpu_dai_shutdown, |
| .prepare = atmel_pdmic_cpu_dai_prepare, |
| }; |
| |
| #define ATMEL_PDMIC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) |
| |
| static struct snd_soc_dai_driver atmel_pdmic_cpu_dai = { |
| .capture = { |
| .channels_min = 1, |
| .channels_max = 1, |
| .rates = SNDRV_PCM_RATE_KNOT, |
| .formats = ATMEL_PDMIC_FORMATS,}, |
| .ops = &atmel_pdmic_cpu_dai_ops, |
| }; |
| |
| static const struct snd_soc_component_driver atmel_pdmic_cpu_dai_component = { |
| .name = "atmel-pdmic", |
| }; |
| |
| /* platform */ |
| #define ATMEL_PDMIC_MAX_BUF_SIZE (64 * 1024) |
| #define ATMEL_PDMIC_PREALLOC_BUF_SIZE ATMEL_PDMIC_MAX_BUF_SIZE |
| |
| static const struct snd_pcm_hardware atmel_pdmic_hw = { |
| .info = SNDRV_PCM_INFO_MMAP |
| | SNDRV_PCM_INFO_MMAP_VALID |
| | SNDRV_PCM_INFO_INTERLEAVED |
| | SNDRV_PCM_INFO_RESUME |
| | SNDRV_PCM_INFO_PAUSE, |
| .formats = ATMEL_PDMIC_FORMATS, |
| .buffer_bytes_max = ATMEL_PDMIC_MAX_BUF_SIZE, |
| .period_bytes_min = 256, |
| .period_bytes_max = 32 * 1024, |
| .periods_min = 2, |
| .periods_max = 256, |
| }; |
| |
| static int |
| atmel_pdmic_platform_configure_dma(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params, |
| struct dma_slave_config *slave_config) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); |
| int ret; |
| |
| ret = snd_hwparams_to_dma_slave_config(substream, params, |
| slave_config); |
| if (ret) { |
| dev_err(dd->dev, |
| "hw params to dma slave configure failed\n"); |
| return ret; |
| } |
| |
| slave_config->src_addr = dd->phy_base + PDMIC_CDR; |
| slave_config->src_maxburst = 1; |
| slave_config->dst_maxburst = 1; |
| |
| return 0; |
| } |
| |
| static const struct snd_dmaengine_pcm_config |
| atmel_pdmic_dmaengine_pcm_config = { |
| .prepare_slave_config = atmel_pdmic_platform_configure_dma, |
| .pcm_hardware = &atmel_pdmic_hw, |
| .prealloc_buffer_size = ATMEL_PDMIC_PREALLOC_BUF_SIZE, |
| }; |
| |
| /* codec */ |
| /* Mic Gain = dgain * 2^(-scale) */ |
| struct mic_gain { |
| unsigned int dgain; |
| unsigned int scale; |
| }; |
| |
| /* range from -90 dB to 90 dB */ |
| static const struct mic_gain mic_gain_table[] = { |
| { 1, 15}, { 1, 14}, /* -90, -84 dB */ |
| { 3, 15}, { 1, 13}, { 3, 14}, { 1, 12}, /* -81, -78, -75, -72 dB */ |
| { 5, 14}, { 13, 15}, /* -70, -68 dB */ |
| { 9, 14}, { 21, 15}, { 23, 15}, { 13, 14}, /* -65 ~ -62 dB */ |
| { 29, 15}, { 33, 15}, { 37, 15}, { 41, 15}, /* -61 ~ -58 dB */ |
| { 23, 14}, { 13, 13}, { 58, 15}, { 65, 15}, /* -57 ~ -54 dB */ |
| { 73, 15}, { 41, 14}, { 23, 13}, { 13, 12}, /* -53 ~ -50 dB */ |
| { 29, 13}, { 65, 14}, { 73, 14}, { 41, 13}, /* -49 ~ -46 dB */ |
| { 23, 12}, { 207, 15}, { 29, 12}, { 65, 13}, /* -45 ~ -42 dB */ |
| { 73, 13}, { 41, 12}, { 23, 11}, { 413, 15}, /* -41 ~ -38 dB */ |
| { 463, 15}, { 519, 15}, { 583, 15}, { 327, 14}, /* -37 ~ -34 dB */ |
| { 367, 14}, { 823, 15}, { 231, 13}, { 1036, 15}, /* -33 ~ -30 dB */ |
| { 1163, 15}, { 1305, 15}, { 183, 12}, { 1642, 15}, /* -29 ~ -26 dB */ |
| { 1843, 15}, { 2068, 15}, { 145, 11}, { 2603, 15}, /* -25 ~ -22 dB */ |
| { 365, 12}, { 3277, 15}, { 3677, 15}, { 4125, 15}, /* -21 ~ -18 dB */ |
| { 4629, 15}, { 5193, 15}, { 5827, 15}, { 3269, 14}, /* -17 ~ -14 dB */ |
| { 917, 12}, { 8231, 15}, { 9235, 15}, { 5181, 14}, /* -13 ~ -10 dB */ |
| {11627, 15}, {13045, 15}, {14637, 15}, {16423, 15}, /* -9 ~ -6 dB */ |
| {18427, 15}, {20675, 15}, { 5799, 13}, {26029, 15}, /* -5 ~ -2 dB */ |
| { 7301, 13}, { 1, 0}, {18383, 14}, {10313, 13}, /* -1 ~ 2 dB */ |
| {23143, 14}, {25967, 14}, {29135, 14}, {16345, 13}, /* 3 ~ 6 dB */ |
| { 4585, 11}, {20577, 13}, { 1443, 9}, {25905, 13}, /* 7 ~ 10 dB */ |
| {14533, 12}, { 8153, 11}, { 2287, 9}, {20529, 12}, /* 11 ~ 14 dB */ |
| {11517, 11}, { 6461, 10}, {28997, 12}, { 4067, 9}, /* 15 ~ 18 dB */ |
| {18253, 11}, { 10, 0}, {22979, 11}, {25783, 11}, /* 19 ~ 22 dB */ |
| {28929, 11}, {32459, 11}, { 9105, 9}, {20431, 10}, /* 23 ~ 26 dB */ |
| {22925, 10}, {12861, 9}, { 7215, 8}, {16191, 9}, /* 27 ~ 30 dB */ |
| { 9083, 8}, {20383, 9}, {11435, 8}, { 6145, 7}, /* 31 ~ 34 dB */ |
| { 3599, 6}, {32305, 9}, {18123, 8}, {20335, 8}, /* 35 ~ 38 dB */ |
| { 713, 3}, { 100, 0}, { 7181, 6}, { 8057, 6}, /* 39 ~ 42 dB */ |
| { 565, 2}, {20287, 7}, {11381, 6}, {25539, 7}, /* 43 ~ 46 dB */ |
| { 1791, 3}, { 4019, 4}, { 9019, 5}, {20239, 6}, /* 47 ~ 50 dB */ |
| { 5677, 4}, {25479, 6}, { 7147, 4}, { 8019, 4}, /* 51 ~ 54 dB */ |
| {17995, 5}, {20191, 5}, {11327, 4}, {12709, 4}, /* 55 ~ 58 dB */ |
| { 3565, 2}, { 1000, 0}, { 1122, 0}, { 1259, 0}, /* 59 ~ 62 dB */ |
| { 2825, 1}, {12679, 3}, { 7113, 2}, { 7981, 2}, /* 63 ~ 66 dB */ |
| { 8955, 2}, {20095, 3}, {22547, 3}, {12649, 2}, /* 67 ~ 70 dB */ |
| {28385, 3}, { 3981, 0}, {17867, 2}, {20047, 2}, /* 71 ~ 74 dB */ |
| {11247, 1}, {12619, 1}, {14159, 1}, {31773, 2}, /* 75 ~ 78 dB */ |
| {17825, 1}, {10000, 0}, {11220, 0}, {12589, 0}, /* 79 ~ 82 dB */ |
| {28251, 1}, {15849, 0}, {17783, 0}, {19953, 0}, /* 83 ~ 86 dB */ |
| {22387, 0}, {25119, 0}, {28184, 0}, {31623, 0}, /* 87 ~ 90 dB */ |
| }; |
| |
| static const DECLARE_TLV_DB_RANGE(mic_gain_tlv, |
| 0, 1, TLV_DB_SCALE_ITEM(-9000, 600, 0), |
| 2, 5, TLV_DB_SCALE_ITEM(-8100, 300, 0), |
| 6, 7, TLV_DB_SCALE_ITEM(-7000, 200, 0), |
| 8, ARRAY_SIZE(mic_gain_table)-1, TLV_DB_SCALE_ITEM(-6500, 100, 0), |
| ); |
| |
| static int pdmic_get_mic_volsw(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *ucontrol) |
| { |
| struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| unsigned int dgain_val, scale_val; |
| int i; |
| |
| dgain_val = (snd_soc_component_read32(component, PDMIC_DSPR1) & PDMIC_DSPR1_DGAIN_MASK) |
| >> PDMIC_DSPR1_DGAIN_SHIFT; |
| |
| scale_val = (snd_soc_component_read32(component, PDMIC_DSPR0) & PDMIC_DSPR0_SCALE_MASK) |
| >> PDMIC_DSPR0_SCALE_SHIFT; |
| |
| for (i = 0; i < ARRAY_SIZE(mic_gain_table); i++) { |
| if ((mic_gain_table[i].dgain == dgain_val) && |
| (mic_gain_table[i].scale == scale_val)) |
| ucontrol->value.integer.value[0] = i; |
| } |
| |
| return 0; |
| } |
| |
| static int pdmic_put_mic_volsw(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *ucontrol) |
| { |
| struct soc_mixer_control *mc = |
| (struct soc_mixer_control *)kcontrol->private_value; |
| struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| int max = mc->max; |
| unsigned int val; |
| int ret; |
| |
| val = ucontrol->value.integer.value[0]; |
| |
| if (val > max) |
| return -EINVAL; |
| |
| ret = snd_soc_component_update_bits(component, PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_MASK, |
| mic_gain_table[val].dgain << PDMIC_DSPR1_DGAIN_SHIFT); |
| if (ret < 0) |
| return ret; |
| |
| ret = snd_soc_component_update_bits(component, PDMIC_DSPR0, PDMIC_DSPR0_SCALE_MASK, |
| mic_gain_table[val].scale << PDMIC_DSPR0_SCALE_SHIFT); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static const struct snd_kcontrol_new atmel_pdmic_snd_controls[] = { |
| SOC_SINGLE_EXT_TLV("Mic Capture Volume", PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_SHIFT, |
| ARRAY_SIZE(mic_gain_table)-1, 0, |
| pdmic_get_mic_volsw, pdmic_put_mic_volsw, mic_gain_tlv), |
| |
| SOC_SINGLE("High Pass Filter Switch", PDMIC_DSPR0, |
| PDMIC_DSPR0_HPFBYP_SHIFT, 1, 1), |
| |
| SOC_SINGLE("SINCC Filter Switch", PDMIC_DSPR0, PDMIC_DSPR0_SINBYP_SHIFT, 1, 1), |
| }; |
| |
| static int atmel_pdmic_component_probe(struct snd_soc_component *component) |
| { |
| struct snd_soc_card *card = snd_soc_component_get_drvdata(component); |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card); |
| |
| snd_soc_component_update_bits(component, PDMIC_DSPR1, PDMIC_DSPR1_OFFSET_MASK, |
| (u32)(dd->pdata->mic_offset << PDMIC_DSPR1_OFFSET_SHIFT)); |
| |
| return 0; |
| } |
| |
| static struct snd_soc_component_driver soc_component_dev_pdmic = { |
| .probe = atmel_pdmic_component_probe, |
| .controls = atmel_pdmic_snd_controls, |
| .num_controls = ARRAY_SIZE(atmel_pdmic_snd_controls), |
| .idle_bias_on = 1, |
| .use_pmdown_time = 1, |
| .endianness = 1, |
| .non_legacy_dai_naming = 1, |
| }; |
| |
| /* codec dai component */ |
| #define PDMIC_MR_PRESCAL_MAX_VAL 127 |
| |
| static int |
| atmel_pdmic_codec_dai_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params, |
| struct snd_soc_dai *codec_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); |
| struct snd_soc_component *component = codec_dai->component; |
| unsigned int rate_min = substream->runtime->hw.rate_min; |
| unsigned int rate_max = substream->runtime->hw.rate_max; |
| int fs = params_rate(params); |
| int bits = params_width(params); |
| unsigned long pclk_rate, gclk_rate; |
| unsigned int f_pdmic; |
| u32 mr_val, dspr0_val, pclk_prescal, gclk_prescal; |
| |
| if (params_channels(params) != 1) { |
| dev_err(component->dev, |
| "only supports one channel\n"); |
| return -EINVAL; |
| } |
| |
| if ((fs < rate_min) || (fs > rate_max)) { |
| dev_err(component->dev, |
| "sample rate is %dHz, min rate is %dHz, max rate is %dHz\n", |
| fs, rate_min, rate_max); |
| |
| return -EINVAL; |
| } |
| |
| switch (bits) { |
| case 16: |
| dspr0_val = (PDMIC_DSPR0_SIZE_16_BITS |
| << PDMIC_DSPR0_SIZE_SHIFT); |
| break; |
| case 32: |
| dspr0_val = (PDMIC_DSPR0_SIZE_32_BITS |
| << PDMIC_DSPR0_SIZE_SHIFT); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if ((fs << 7) > (rate_max << 6)) { |
| f_pdmic = fs << 6; |
| dspr0_val |= PDMIC_DSPR0_OSR_64 << PDMIC_DSPR0_OSR_SHIFT; |
| } else { |
| f_pdmic = fs << 7; |
| dspr0_val |= PDMIC_DSPR0_OSR_128 << PDMIC_DSPR0_OSR_SHIFT; |
| } |
| |
| pclk_rate = clk_get_rate(dd->pclk); |
| gclk_rate = clk_get_rate(dd->gclk); |
| |
| /* PRESCAL = SELCK/(2*f_pdmic) - 1*/ |
| pclk_prescal = (u32)(pclk_rate/(f_pdmic << 1)) - 1; |
| gclk_prescal = (u32)(gclk_rate/(f_pdmic << 1)) - 1; |
| |
| if ((pclk_prescal > PDMIC_MR_PRESCAL_MAX_VAL) || |
| (gclk_rate/((gclk_prescal + 1) << 1) < |
| pclk_rate/((pclk_prescal + 1) << 1))) { |
| mr_val = gclk_prescal << PDMIC_MR_PRESCAL_SHIFT; |
| mr_val |= PDMIC_MR_CLKS_GCK << PDMIC_MR_CLKS_SHIFT; |
| } else { |
| mr_val = pclk_prescal << PDMIC_MR_PRESCAL_SHIFT; |
| mr_val |= PDMIC_MR_CLKS_PCK << PDMIC_MR_CLKS_SHIFT; |
| } |
| |
| snd_soc_component_update_bits(component, PDMIC_MR, |
| PDMIC_MR_PRESCAL_MASK | PDMIC_MR_CLKS_MASK, mr_val); |
| |
| snd_soc_component_update_bits(component, PDMIC_DSPR0, |
| PDMIC_DSPR0_OSR_MASK | PDMIC_DSPR0_SIZE_MASK, dspr0_val); |
| |
| return 0; |
| } |
| |
| static int atmel_pdmic_codec_dai_prepare(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *codec_dai) |
| { |
| struct snd_soc_component *component = codec_dai->component; |
| |
| snd_soc_component_update_bits(component, PDMIC_CR, PDMIC_CR_ENPDM_MASK, |
| PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT); |
| |
| return 0; |
| } |
| |
| static int atmel_pdmic_codec_dai_trigger(struct snd_pcm_substream *substream, |
| int cmd, struct snd_soc_dai *codec_dai) |
| { |
| struct snd_soc_component *component = codec_dai->component; |
| u32 val; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| val = PDMIC_CR_ENPDM_EN << PDMIC_CR_ENPDM_SHIFT; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| val = PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| snd_soc_component_update_bits(component, PDMIC_CR, PDMIC_CR_ENPDM_MASK, val); |
| |
| return 0; |
| } |
| |
| static const struct snd_soc_dai_ops atmel_pdmic_codec_dai_ops = { |
| .hw_params = atmel_pdmic_codec_dai_hw_params, |
| .prepare = atmel_pdmic_codec_dai_prepare, |
| .trigger = atmel_pdmic_codec_dai_trigger, |
| }; |
| |
| #define ATMEL_PDMIC_CODEC_DAI_NAME "atmel-pdmic-hifi" |
| |
| static struct snd_soc_dai_driver atmel_pdmic_codec_dai = { |
| .name = ATMEL_PDMIC_CODEC_DAI_NAME, |
| .capture = { |
| .stream_name = "Capture", |
| .channels_min = 1, |
| .channels_max = 1, |
| .rates = SNDRV_PCM_RATE_KNOT, |
| .formats = ATMEL_PDMIC_FORMATS, |
| }, |
| .ops = &atmel_pdmic_codec_dai_ops, |
| }; |
| |
| /* ASoC sound card */ |
| static int atmel_pdmic_asoc_card_init(struct device *dev, |
| struct snd_soc_card *card) |
| { |
| struct snd_soc_dai_link *dai_link; |
| struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card); |
| struct snd_soc_dai_link_component *comp; |
| |
| dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); |
| if (!dai_link) |
| return -ENOMEM; |
| |
| comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL); |
| if (!comp) |
| return -ENOMEM; |
| |
| dai_link->cpus = &comp[0]; |
| dai_link->codecs = &comp[1]; |
| dai_link->platforms = &comp[2]; |
| |
| dai_link->num_cpus = 1; |
| dai_link->num_codecs = 1; |
| dai_link->num_platforms = 1; |
| |
| dai_link->name = "PDMIC"; |
| dai_link->stream_name = "PDMIC PCM"; |
| dai_link->codecs->dai_name = ATMEL_PDMIC_CODEC_DAI_NAME; |
| dai_link->cpus->dai_name = dev_name(dev); |
| dai_link->codecs->name = dev_name(dev); |
| dai_link->platforms->name = dev_name(dev); |
| |
| card->dai_link = dai_link; |
| card->num_links = 1; |
| card->name = dd->pdata->card_name; |
| card->dev = dev; |
| |
| return 0; |
| } |
| |
| static void atmel_pdmic_get_sample_rate(struct atmel_pdmic *dd, |
| unsigned int *rate_min, unsigned int *rate_max) |
| { |
| u32 mic_min_freq = dd->pdata->mic_min_freq; |
| u32 mic_max_freq = dd->pdata->mic_max_freq; |
| u32 clk_max_rate = (u32)(clk_get_rate(dd->pclk) >> 1); |
| u32 clk_min_rate = (u32)(clk_get_rate(dd->gclk) >> 8); |
| |
| if (mic_max_freq > clk_max_rate) |
| mic_max_freq = clk_max_rate; |
| |
| if (mic_min_freq < clk_min_rate) |
| mic_min_freq = clk_min_rate; |
| |
| *rate_min = DIV_ROUND_CLOSEST(mic_min_freq, 128); |
| *rate_max = mic_max_freq >> 6; |
| } |
| |
| /* PDMIC interrupt handler */ |
| static irqreturn_t atmel_pdmic_interrupt(int irq, void *dev_id) |
| { |
| struct atmel_pdmic *dd = (struct atmel_pdmic *)dev_id; |
| u32 pdmic_isr; |
| irqreturn_t ret = IRQ_NONE; |
| |
| regmap_read(dd->regmap, PDMIC_ISR, &pdmic_isr); |
| |
| if (pdmic_isr & PDMIC_ISR_OVRE) { |
| regmap_update_bits(dd->regmap, PDMIC_CR, PDMIC_CR_ENPDM_MASK, |
| PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT); |
| |
| snd_pcm_stop_xrun(dd->substream); |
| |
| ret = IRQ_HANDLED; |
| } |
| |
| return ret; |
| } |
| |
| /* regmap configuration */ |
| #define ATMEL_PDMIC_REG_MAX 0x124 |
| static const struct regmap_config atmel_pdmic_regmap_config = { |
| .reg_bits = 32, |
| .reg_stride = 4, |
| .val_bits = 32, |
| .max_register = ATMEL_PDMIC_REG_MAX, |
| }; |
| |
| static int atmel_pdmic_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct atmel_pdmic *dd; |
| struct resource *res; |
| void __iomem *io_base; |
| const struct atmel_pdmic_pdata *pdata; |
| struct snd_soc_card *card; |
| unsigned int rate_min, rate_max; |
| int ret; |
| |
| pdata = atmel_pdmic_dt_init(dev); |
| if (IS_ERR(pdata)) |
| return PTR_ERR(pdata); |
| |
| dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); |
| if (!dd) |
| return -ENOMEM; |
| |
| dd->pdata = pdata; |
| dd->dev = dev; |
| |
| dd->irq = platform_get_irq(pdev, 0); |
| if (dd->irq < 0) { |
| ret = dd->irq; |
| dev_err(dev, "failed to get irq: %d\n", ret); |
| return ret; |
| } |
| |
| dd->pclk = devm_clk_get(dev, "pclk"); |
| if (IS_ERR(dd->pclk)) { |
| ret = PTR_ERR(dd->pclk); |
| dev_err(dev, "failed to get peripheral clock: %d\n", ret); |
| return ret; |
| } |
| |
| dd->gclk = devm_clk_get(dev, "gclk"); |
| if (IS_ERR(dd->gclk)) { |
| ret = PTR_ERR(dd->gclk); |
| dev_err(dev, "failed to get GCK: %d\n", ret); |
| return ret; |
| } |
| |
| /* The gclk clock frequency must always be three times |
| * lower than the pclk clock frequency |
| */ |
| ret = clk_set_rate(dd->gclk, clk_get_rate(dd->pclk)/3); |
| if (ret) { |
| dev_err(dev, "failed to set GCK clock rate: %d\n", ret); |
| return ret; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| io_base = devm_ioremap_resource(dev, res); |
| if (IS_ERR(io_base)) |
| return PTR_ERR(io_base); |
| |
| dd->phy_base = res->start; |
| |
| dd->regmap = devm_regmap_init_mmio(dev, io_base, |
| &atmel_pdmic_regmap_config); |
| if (IS_ERR(dd->regmap)) { |
| ret = PTR_ERR(dd->regmap); |
| dev_err(dev, "failed to init register map: %d\n", ret); |
| return ret; |
| } |
| |
| ret = devm_request_irq(dev, dd->irq, atmel_pdmic_interrupt, 0, |
| "PDMIC", (void *)dd); |
| if (ret < 0) { |
| dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", |
| dd->irq, ret); |
| return ret; |
| } |
| |
| /* Get the minimal and maximal sample rate that the microphone supports */ |
| atmel_pdmic_get_sample_rate(dd, &rate_min, &rate_max); |
| |
| /* register cpu dai */ |
| atmel_pdmic_cpu_dai.capture.rate_min = rate_min; |
| atmel_pdmic_cpu_dai.capture.rate_max = rate_max; |
| ret = devm_snd_soc_register_component(dev, |
| &atmel_pdmic_cpu_dai_component, |
| &atmel_pdmic_cpu_dai, 1); |
| if (ret) { |
| dev_err(dev, "could not register CPU DAI: %d\n", ret); |
| return ret; |
| } |
| |
| /* register platform */ |
| ret = devm_snd_dmaengine_pcm_register(dev, |
| &atmel_pdmic_dmaengine_pcm_config, |
| 0); |
| if (ret) { |
| dev_err(dev, "could not register platform: %d\n", ret); |
| return ret; |
| } |
| |
| /* register codec and codec dai */ |
| atmel_pdmic_codec_dai.capture.rate_min = rate_min; |
| atmel_pdmic_codec_dai.capture.rate_max = rate_max; |
| ret = devm_snd_soc_register_component(dev, &soc_component_dev_pdmic, |
| &atmel_pdmic_codec_dai, 1); |
| if (ret) { |
| dev_err(dev, "could not register component: %d\n", ret); |
| return ret; |
| } |
| |
| /* register sound card */ |
| card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); |
| if (!card) { |
| ret = -ENOMEM; |
| goto unregister_codec; |
| } |
| |
| snd_soc_card_set_drvdata(card, dd); |
| |
| ret = atmel_pdmic_asoc_card_init(dev, card); |
| if (ret) { |
| dev_err(dev, "failed to init sound card: %d\n", ret); |
| goto unregister_codec; |
| } |
| |
| ret = devm_snd_soc_register_card(dev, card); |
| if (ret) { |
| dev_err(dev, "failed to register sound card: %d\n", ret); |
| goto unregister_codec; |
| } |
| |
| return 0; |
| |
| unregister_codec: |
| return ret; |
| } |
| |
| static int atmel_pdmic_remove(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| static struct platform_driver atmel_pdmic_driver = { |
| .driver = { |
| .name = "atmel-pdmic", |
| .of_match_table = of_match_ptr(atmel_pdmic_of_match), |
| .pm = &snd_soc_pm_ops, |
| }, |
| .probe = atmel_pdmic_probe, |
| .remove = atmel_pdmic_remove, |
| }; |
| module_platform_driver(atmel_pdmic_driver); |
| |
| MODULE_DESCRIPTION("Atmel PDMIC driver under ALSA SoC architecture"); |
| MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>"); |
| MODULE_LICENSE("GPL v2"); |