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638 lines
16 KiB
638 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver |
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* |
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* Copyright (C) 2015 Atmel |
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* |
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* Author: Songjun Wu <[email protected]> |
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*/ |
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#include <linux/of.h> |
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#include <linux/clk.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <sound/core.h> |
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#include <sound/dmaengine_pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/tlv.h> |
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#include "atmel-classd.h" |
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struct atmel_classd_pdata { |
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bool non_overlap_enable; |
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int non_overlap_time; |
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int pwm_type; |
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const char *card_name; |
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}; |
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struct atmel_classd { |
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dma_addr_t phy_base; |
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struct regmap *regmap; |
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struct clk *pclk; |
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struct clk *gclk; |
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struct device *dev; |
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int irq; |
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const struct atmel_classd_pdata *pdata; |
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}; |
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#ifdef CONFIG_OF |
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static const struct of_device_id atmel_classd_of_match[] = { |
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{ |
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.compatible = "atmel,sama5d2-classd", |
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}, { |
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/* sentinel */ |
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} |
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}; |
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MODULE_DEVICE_TABLE(of, atmel_classd_of_match); |
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static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev) |
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{ |
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struct device_node *np = dev->of_node; |
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struct atmel_classd_pdata *pdata; |
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const char *pwm_type; |
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int ret; |
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if (!np) { |
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dev_err(dev, "device node not found\n"); |
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return ERR_PTR(-EINVAL); |
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} |
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
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if (!pdata) |
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return ERR_PTR(-ENOMEM); |
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ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type); |
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if ((ret == 0) && (strcmp(pwm_type, "diff") == 0)) |
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pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF; |
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else |
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pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE; |
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ret = of_property_read_u32(np, |
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"atmel,non-overlap-time", &pdata->non_overlap_time); |
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if (ret) |
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pdata->non_overlap_enable = false; |
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else |
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pdata->non_overlap_enable = true; |
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ret = of_property_read_string(np, "atmel,model", &pdata->card_name); |
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if (ret) |
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pdata->card_name = "CLASSD"; |
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return pdata; |
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} |
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#else |
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static inline struct atmel_classd_pdata * |
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atmel_classd_dt_init(struct device *dev) |
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{ |
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return ERR_PTR(-EINVAL); |
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} |
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#endif |
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#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \ |
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| SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \ |
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| SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \ |
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| SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \ |
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| SNDRV_PCM_RATE_96000) |
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static const struct snd_pcm_hardware atmel_classd_hw = { |
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.info = SNDRV_PCM_INFO_MMAP |
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| SNDRV_PCM_INFO_MMAP_VALID |
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| SNDRV_PCM_INFO_INTERLEAVED |
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| SNDRV_PCM_INFO_RESUME |
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| SNDRV_PCM_INFO_PAUSE, |
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.formats = (SNDRV_PCM_FMTBIT_S16_LE), |
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.rates = ATMEL_CLASSD_RATES, |
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.rate_min = 8000, |
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.rate_max = 96000, |
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.channels_min = 1, |
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.channels_max = 2, |
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.buffer_bytes_max = 64 * 1024, |
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.period_bytes_min = 256, |
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.period_bytes_max = 32 * 1024, |
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.periods_min = 2, |
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.periods_max = 256, |
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}; |
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#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024) |
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/* cpu dai component */ |
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static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); |
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int err; |
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regmap_write(dd->regmap, CLASSD_THR, 0x0); |
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err = clk_prepare_enable(dd->pclk); |
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if (err) |
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return err; |
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err = clk_prepare_enable(dd->gclk); |
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if (err) { |
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clk_disable_unprepare(dd->pclk); |
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return err; |
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} |
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return 0; |
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} |
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/* platform */ |
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static int |
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atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct dma_slave_config *slave_config) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); |
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if (params_physical_width(params) != 16) { |
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dev_err(dd->dev, |
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"only supports 16-bit audio data\n"); |
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return -EINVAL; |
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} |
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if (params_channels(params) == 1) |
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slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; |
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else |
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slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
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slave_config->direction = DMA_MEM_TO_DEV; |
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slave_config->dst_addr = dd->phy_base + CLASSD_THR; |
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slave_config->dst_maxburst = 1; |
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slave_config->src_maxburst = 1; |
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slave_config->device_fc = false; |
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return 0; |
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} |
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static const struct snd_dmaengine_pcm_config |
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atmel_classd_dmaengine_pcm_config = { |
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.prepare_slave_config = atmel_classd_platform_configure_dma, |
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.pcm_hardware = &atmel_classd_hw, |
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.prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE, |
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}; |
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/* codec */ |
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static const char * const mono_mode_text[] = { |
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"mix", "sat", "left", "right" |
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}; |
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static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum, |
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CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT, |
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mono_mode_text); |
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static const char * const eqcfg_text[] = { |
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"Treble-12dB", "Treble-6dB", |
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"Medium-8dB", "Medium-3dB", |
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"Bass-12dB", "Bass-6dB", |
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"0 dB", |
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"Bass+6dB", "Bass+12dB", |
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"Medium+3dB", "Medium+8dB", |
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"Treble+6dB", "Treble+12dB", |
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}; |
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static const unsigned int eqcfg_value[] = { |
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CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6, |
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CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3, |
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CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6, |
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CLASSD_INTPMR_EQCFG_FLAT, |
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CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12, |
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CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8, |
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CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12, |
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}; |
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static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum, |
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CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf, |
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eqcfg_text, eqcfg_value); |
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static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1); |
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static const struct snd_kcontrol_new atmel_classd_snd_controls[] = { |
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SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR, |
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CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT, |
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78, 1, classd_digital_tlv), |
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SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR, |
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CLASSD_INTPMR_DEEMP_SHIFT, 1, 0), |
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SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0), |
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SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0), |
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SOC_ENUM("Mono Mode", classd_mono_mode_enum), |
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SOC_ENUM("EQ", classd_eqcfg_enum), |
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}; |
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static const char * const pwm_type[] = { |
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"Single ended", "Differential" |
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}; |
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static int atmel_classd_component_probe(struct snd_soc_component *component) |
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{ |
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struct snd_soc_card *card = snd_soc_component_get_drvdata(component); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(card); |
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const struct atmel_classd_pdata *pdata = dd->pdata; |
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u32 mask, val; |
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mask = CLASSD_MR_PWMTYP_MASK; |
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val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT; |
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mask |= CLASSD_MR_NON_OVERLAP_MASK; |
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if (pdata->non_overlap_enable) { |
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val |= (CLASSD_MR_NON_OVERLAP_EN |
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<< CLASSD_MR_NON_OVERLAP_SHIFT); |
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mask |= CLASSD_MR_NOVR_VAL_MASK; |
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switch (pdata->non_overlap_time) { |
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case 5: |
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val |= (CLASSD_MR_NOVR_VAL_5NS |
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<< CLASSD_MR_NOVR_VAL_SHIFT); |
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break; |
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case 10: |
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val |= (CLASSD_MR_NOVR_VAL_10NS |
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<< CLASSD_MR_NOVR_VAL_SHIFT); |
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break; |
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case 15: |
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val |= (CLASSD_MR_NOVR_VAL_15NS |
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<< CLASSD_MR_NOVR_VAL_SHIFT); |
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break; |
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case 20: |
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val |= (CLASSD_MR_NOVR_VAL_20NS |
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<< CLASSD_MR_NOVR_VAL_SHIFT); |
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break; |
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default: |
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val |= (CLASSD_MR_NOVR_VAL_10NS |
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<< CLASSD_MR_NOVR_VAL_SHIFT); |
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dev_warn(component->dev, |
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"non-overlapping value %d is invalid, the default value 10 is specified\n", |
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pdata->non_overlap_time); |
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break; |
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} |
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} |
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snd_soc_component_update_bits(component, CLASSD_MR, mask, val); |
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dev_info(component->dev, |
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"PWM modulation type is %s, non-overlapping is %s\n", |
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pwm_type[pdata->pwm_type], |
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pdata->non_overlap_enable?"enabled":"disabled"); |
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return 0; |
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} |
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static int atmel_classd_component_resume(struct snd_soc_component *component) |
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{ |
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struct snd_soc_card *card = snd_soc_component_get_drvdata(component); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(card); |
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return regcache_sync(dd->regmap); |
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} |
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static int atmel_classd_cpu_dai_mute_stream(struct snd_soc_dai *cpu_dai, |
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int mute, int direction) |
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{ |
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struct snd_soc_component *component = cpu_dai->component; |
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u32 mask, val; |
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mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK; |
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if (mute) |
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val = mask; |
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else |
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val = 0; |
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snd_soc_component_update_bits(component, CLASSD_MR, mask, val); |
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return 0; |
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} |
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#define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8) |
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#define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8) |
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static struct { |
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int rate; |
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int sample_rate; |
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int dsp_clk; |
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unsigned long gclk_rate; |
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} const sample_rates[] = { |
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{ 8000, CLASSD_INTPMR_FRAME_8K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, |
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{ 16000, CLASSD_INTPMR_FRAME_16K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, |
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{ 32000, CLASSD_INTPMR_FRAME_32K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, |
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{ 48000, CLASSD_INTPMR_FRAME_48K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, |
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{ 96000, CLASSD_INTPMR_FRAME_96K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, |
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{ 22050, CLASSD_INTPMR_FRAME_22K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, |
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{ 44100, CLASSD_INTPMR_FRAME_44K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, |
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{ 88200, CLASSD_INTPMR_FRAME_88K, |
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CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, |
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}; |
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static int |
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atmel_classd_cpu_dai_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); |
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struct snd_soc_component *component = cpu_dai->component; |
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int fs; |
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int i, best, best_val, cur_val, ret; |
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u32 mask, val; |
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fs = params_rate(params); |
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best = 0; |
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best_val = abs(fs - sample_rates[0].rate); |
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for (i = 1; i < ARRAY_SIZE(sample_rates); i++) { |
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/* Closest match */ |
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cur_val = abs(fs - sample_rates[i].rate); |
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if (cur_val < best_val) { |
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best = i; |
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best_val = cur_val; |
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} |
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} |
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dev_dbg(component->dev, |
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"Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n", |
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sample_rates[best].rate, sample_rates[best].gclk_rate); |
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clk_disable_unprepare(dd->gclk); |
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ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate); |
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if (ret) |
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return ret; |
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mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK; |
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val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT) |
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| (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT); |
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snd_soc_component_update_bits(component, CLASSD_INTPMR, mask, val); |
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return clk_prepare_enable(dd->gclk); |
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} |
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static void |
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atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); |
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clk_disable_unprepare(dd->gclk); |
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} |
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static int atmel_classd_cpu_dai_prepare(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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struct snd_soc_component *component = cpu_dai->component; |
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snd_soc_component_update_bits(component, CLASSD_MR, |
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CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK, |
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(CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) |
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|(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT)); |
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return 0; |
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} |
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static int atmel_classd_cpu_dai_trigger(struct snd_pcm_substream *substream, |
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int cmd, struct snd_soc_dai *cpu_dai) |
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{ |
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struct snd_soc_component *component = cpu_dai->component; |
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u32 mask, val; |
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mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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val = mask; |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) |
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| (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT); |
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break; |
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default: |
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return -EINVAL; |
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} |
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snd_soc_component_update_bits(component, CLASSD_MR, mask, val); |
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|
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return 0; |
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} |
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static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = { |
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.startup = atmel_classd_cpu_dai_startup, |
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.shutdown = atmel_classd_cpu_dai_shutdown, |
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.mute_stream = atmel_classd_cpu_dai_mute_stream, |
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.hw_params = atmel_classd_cpu_dai_hw_params, |
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.prepare = atmel_classd_cpu_dai_prepare, |
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.trigger = atmel_classd_cpu_dai_trigger, |
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.no_capture_mute = 1, |
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}; |
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|
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static struct snd_soc_dai_driver atmel_classd_cpu_dai = { |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = ATMEL_CLASSD_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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}, |
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.ops = &atmel_classd_cpu_dai_ops, |
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}; |
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static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = { |
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.name = "atmel-classd", |
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.probe = atmel_classd_component_probe, |
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.resume = atmel_classd_component_resume, |
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.controls = atmel_classd_snd_controls, |
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.num_controls = ARRAY_SIZE(atmel_classd_snd_controls), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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}; |
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|
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/* ASoC sound card */ |
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static int atmel_classd_asoc_card_init(struct device *dev, |
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struct snd_soc_card *card) |
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{ |
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struct snd_soc_dai_link *dai_link; |
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struct atmel_classd *dd = snd_soc_card_get_drvdata(card); |
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struct snd_soc_dai_link_component *comp; |
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dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); |
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if (!dai_link) |
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return -ENOMEM; |
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comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL); |
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if (!comp) |
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return -ENOMEM; |
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dai_link->cpus = &comp[0]; |
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dai_link->codecs = &comp[1]; |
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dai_link->platforms = &comp[2]; |
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|
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dai_link->num_cpus = 1; |
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dai_link->num_codecs = 1; |
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dai_link->num_platforms = 1; |
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|
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dai_link->name = "CLASSD"; |
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dai_link->stream_name = "CLASSD PCM"; |
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dai_link->codecs->dai_name = "snd-soc-dummy-dai"; |
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dai_link->cpus->dai_name = dev_name(dev); |
|
dai_link->codecs->name = "snd-soc-dummy"; |
|
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; |
|
}; |
|
|
|
/* regmap configuration */ |
|
static const struct reg_default atmel_classd_reg_defaults[] = { |
|
{ CLASSD_INTPMR, 0x00301212 }, |
|
}; |
|
|
|
#define ATMEL_CLASSD_REG_MAX 0xE4 |
|
static const struct regmap_config atmel_classd_regmap_config = { |
|
.reg_bits = 32, |
|
.reg_stride = 4, |
|
.val_bits = 32, |
|
.max_register = ATMEL_CLASSD_REG_MAX, |
|
|
|
.cache_type = REGCACHE_FLAT, |
|
.reg_defaults = atmel_classd_reg_defaults, |
|
.num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults), |
|
}; |
|
|
|
static int atmel_classd_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct atmel_classd *dd; |
|
struct resource *res; |
|
void __iomem *io_base; |
|
const struct atmel_classd_pdata *pdata; |
|
struct snd_soc_card *card; |
|
int ret; |
|
|
|
pdata = dev_get_platdata(dev); |
|
if (!pdata) { |
|
pdata = atmel_classd_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->irq = platform_get_irq(pdev, 0); |
|
if (dd->irq < 0) |
|
return dd->irq; |
|
|
|
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 clock: %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->dev = dev; |
|
|
|
dd->regmap = devm_regmap_init_mmio(dev, io_base, |
|
&atmel_classd_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_snd_soc_register_component(dev, |
|
&atmel_classd_cpu_dai_component, |
|
&atmel_classd_cpu_dai, 1); |
|
if (ret) { |
|
dev_err(dev, "could not register CPU DAI: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = devm_snd_dmaengine_pcm_register(dev, |
|
&atmel_classd_dmaengine_pcm_config, |
|
0); |
|
if (ret) { |
|
dev_err(dev, "could not register platform: %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_classd_asoc_card_init(dev, card); |
|
if (ret) { |
|
dev_err(dev, "failed to init sound card\n"); |
|
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_classd_remove(struct platform_device *pdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static struct platform_driver atmel_classd_driver = { |
|
.driver = { |
|
.name = "atmel-classd", |
|
.of_match_table = of_match_ptr(atmel_classd_of_match), |
|
.pm = &snd_soc_pm_ops, |
|
}, |
|
.probe = atmel_classd_probe, |
|
.remove = atmel_classd_remove, |
|
}; |
|
module_platform_driver(atmel_classd_driver); |
|
|
|
MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture"); |
|
MODULE_AUTHOR("Songjun Wu <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|