| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Songjun Wu | 4018 | 97.74% | 1 | 14.29% |
| Kuninori Morimoto | 78 | 1.90% | 2 | 28.57% |
| Wei Yongjun | 9 | 0.22% | 1 | 14.29% |
| Peter Meerwald-Stadler | 4 | 0.10% | 1 | 14.29% |
| Baoyou Xie | 1 | 0.02% | 1 | 14.29% |
| Ladislav Michl | 1 | 0.02% | 1 | 14.29% |
| Total | 4111 | 7 |
/* Atmel PDMIC driver * * Copyright (C) 2015 Atmel * * Author: Songjun Wu <songjun.wu@atmel.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 or later * as published by the Free Software Foundation. */ #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); dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); if (!dai_link) return -ENOMEM; dai_link->name = "PDMIC"; dai_link->stream_name = "PDMIC PCM"; dai_link->codec_dai_name = ATMEL_PDMIC_CODEC_DAI_NAME; dai_link->cpu_dai_name = dev_name(dev); dai_link->codec_name = dev_name(dev); dai_link->platform_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");
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