1e0a25b6dSSongjun Wu /* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver 2e0a25b6dSSongjun Wu * 3e0a25b6dSSongjun Wu * Copyright (C) 2015 Atmel 4e0a25b6dSSongjun Wu * 5e0a25b6dSSongjun Wu * Author: Songjun Wu <songjun.wu@atmel.com> 6e0a25b6dSSongjun Wu * 7e0a25b6dSSongjun Wu * This program is free software; you can redistribute it and/or modify 8e0a25b6dSSongjun Wu * it under the terms of the GNU General Public License version 2 or later 9e0a25b6dSSongjun Wu * as published by the Free Software Foundation. 10e0a25b6dSSongjun Wu */ 11e0a25b6dSSongjun Wu 12e0a25b6dSSongjun Wu #include <linux/of.h> 13e0a25b6dSSongjun Wu #include <linux/clk.h> 14e0a25b6dSSongjun Wu #include <linux/module.h> 15e0a25b6dSSongjun Wu #include <linux/platform_device.h> 16e0a25b6dSSongjun Wu #include <linux/regmap.h> 17e0a25b6dSSongjun Wu #include <sound/core.h> 18e0a25b6dSSongjun Wu #include <sound/dmaengine_pcm.h> 19e0a25b6dSSongjun Wu #include <sound/pcm_params.h> 20e0a25b6dSSongjun Wu #include <sound/tlv.h> 21e0a25b6dSSongjun Wu #include "atmel-classd.h" 22e0a25b6dSSongjun Wu 23e0a25b6dSSongjun Wu struct atmel_classd_pdata { 24e0a25b6dSSongjun Wu bool non_overlap_enable; 25e0a25b6dSSongjun Wu int non_overlap_time; 26e0a25b6dSSongjun Wu int pwm_type; 27e0a25b6dSSongjun Wu const char *card_name; 28e0a25b6dSSongjun Wu }; 29e0a25b6dSSongjun Wu 30e0a25b6dSSongjun Wu struct atmel_classd { 31e0a25b6dSSongjun Wu dma_addr_t phy_base; 32e0a25b6dSSongjun Wu struct regmap *regmap; 33e0a25b6dSSongjun Wu struct clk *pclk; 34e0a25b6dSSongjun Wu struct clk *gclk; 356dea9df8SKuninori Morimoto struct device *dev; 36e0a25b6dSSongjun Wu int irq; 37e0a25b6dSSongjun Wu const struct atmel_classd_pdata *pdata; 38e0a25b6dSSongjun Wu }; 39e0a25b6dSSongjun Wu 40e0a25b6dSSongjun Wu #ifdef CONFIG_OF 41e0a25b6dSSongjun Wu static const struct of_device_id atmel_classd_of_match[] = { 42e0a25b6dSSongjun Wu { 43e0a25b6dSSongjun Wu .compatible = "atmel,sama5d2-classd", 44e0a25b6dSSongjun Wu }, { 45e0a25b6dSSongjun Wu /* sentinel */ 46e0a25b6dSSongjun Wu } 47e0a25b6dSSongjun Wu }; 48e0a25b6dSSongjun Wu MODULE_DEVICE_TABLE(of, atmel_classd_of_match); 49e0a25b6dSSongjun Wu 50e0a25b6dSSongjun Wu static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev) 51e0a25b6dSSongjun Wu { 52e0a25b6dSSongjun Wu struct device_node *np = dev->of_node; 53e0a25b6dSSongjun Wu struct atmel_classd_pdata *pdata; 54e0a25b6dSSongjun Wu const char *pwm_type; 55e0a25b6dSSongjun Wu int ret; 56e0a25b6dSSongjun Wu 57e0a25b6dSSongjun Wu if (!np) { 58e0a25b6dSSongjun Wu dev_err(dev, "device node not found\n"); 59e0a25b6dSSongjun Wu return ERR_PTR(-EINVAL); 60e0a25b6dSSongjun Wu } 61e0a25b6dSSongjun Wu 62e0a25b6dSSongjun Wu pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 63e0a25b6dSSongjun Wu if (!pdata) 64e0a25b6dSSongjun Wu return ERR_PTR(-ENOMEM); 65e0a25b6dSSongjun Wu 66e0a25b6dSSongjun Wu ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type); 67e0a25b6dSSongjun Wu if ((ret == 0) && (strcmp(pwm_type, "diff") == 0)) 68e0a25b6dSSongjun Wu pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF; 69e0a25b6dSSongjun Wu else 70e0a25b6dSSongjun Wu pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE; 71e0a25b6dSSongjun Wu 72e0a25b6dSSongjun Wu ret = of_property_read_u32(np, 73e0a25b6dSSongjun Wu "atmel,non-overlap-time", &pdata->non_overlap_time); 74e0a25b6dSSongjun Wu if (ret) 75e0a25b6dSSongjun Wu pdata->non_overlap_enable = false; 76e0a25b6dSSongjun Wu else 77e0a25b6dSSongjun Wu pdata->non_overlap_enable = true; 78e0a25b6dSSongjun Wu 79e0a25b6dSSongjun Wu ret = of_property_read_string(np, "atmel,model", &pdata->card_name); 80e0a25b6dSSongjun Wu if (ret) 81e0a25b6dSSongjun Wu pdata->card_name = "CLASSD"; 82e0a25b6dSSongjun Wu 83e0a25b6dSSongjun Wu return pdata; 84e0a25b6dSSongjun Wu } 85e0a25b6dSSongjun Wu #else 86e0a25b6dSSongjun Wu static inline struct atmel_classd_pdata * 87e0a25b6dSSongjun Wu atmel_classd_dt_init(struct device *dev) 88e0a25b6dSSongjun Wu { 89e0a25b6dSSongjun Wu return ERR_PTR(-EINVAL); 90e0a25b6dSSongjun Wu } 91e0a25b6dSSongjun Wu #endif 92e0a25b6dSSongjun Wu 93e0a25b6dSSongjun Wu #define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \ 94e0a25b6dSSongjun Wu | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \ 95e0a25b6dSSongjun Wu | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \ 96e0a25b6dSSongjun Wu | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \ 97e0a25b6dSSongjun Wu | SNDRV_PCM_RATE_96000) 98e0a25b6dSSongjun Wu 99e0a25b6dSSongjun Wu static const struct snd_pcm_hardware atmel_classd_hw = { 100e0a25b6dSSongjun Wu .info = SNDRV_PCM_INFO_MMAP 101e0a25b6dSSongjun Wu | SNDRV_PCM_INFO_MMAP_VALID 102e0a25b6dSSongjun Wu | SNDRV_PCM_INFO_INTERLEAVED 103e0a25b6dSSongjun Wu | SNDRV_PCM_INFO_RESUME 104e0a25b6dSSongjun Wu | SNDRV_PCM_INFO_PAUSE, 105e0a25b6dSSongjun Wu .formats = (SNDRV_PCM_FMTBIT_S16_LE), 106e0a25b6dSSongjun Wu .rates = ATMEL_CLASSD_RATES, 107e0a25b6dSSongjun Wu .rate_min = 8000, 108e0a25b6dSSongjun Wu .rate_max = 96000, 10907c55d39SSongjun Wu .channels_min = 1, 110e0a25b6dSSongjun Wu .channels_max = 2, 111e0a25b6dSSongjun Wu .buffer_bytes_max = 64 * 1024, 112e0a25b6dSSongjun Wu .period_bytes_min = 256, 113e0a25b6dSSongjun Wu .period_bytes_max = 32 * 1024, 114e0a25b6dSSongjun Wu .periods_min = 2, 115e0a25b6dSSongjun Wu .periods_max = 256, 116e0a25b6dSSongjun Wu }; 117e0a25b6dSSongjun Wu 118e0a25b6dSSongjun Wu #define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024) 119e0a25b6dSSongjun Wu 120e0a25b6dSSongjun Wu /* cpu dai component */ 121e0a25b6dSSongjun Wu static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream, 122e0a25b6dSSongjun Wu struct snd_soc_dai *cpu_dai) 123e0a25b6dSSongjun Wu { 124e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 125e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 126e0a25b6dSSongjun Wu 127e0a25b6dSSongjun Wu regmap_write(dd->regmap, CLASSD_THR, 0x0); 128e0a25b6dSSongjun Wu 129e0a25b6dSSongjun Wu return clk_prepare_enable(dd->pclk); 130e0a25b6dSSongjun Wu } 131e0a25b6dSSongjun Wu 132e0a25b6dSSongjun Wu static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream, 133e0a25b6dSSongjun Wu struct snd_soc_dai *cpu_dai) 134e0a25b6dSSongjun Wu { 135e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 136e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 137e0a25b6dSSongjun Wu 138e0a25b6dSSongjun Wu clk_disable_unprepare(dd->pclk); 139e0a25b6dSSongjun Wu } 140e0a25b6dSSongjun Wu 141e0a25b6dSSongjun Wu static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = { 142e0a25b6dSSongjun Wu .startup = atmel_classd_cpu_dai_startup, 143e0a25b6dSSongjun Wu .shutdown = atmel_classd_cpu_dai_shutdown, 144e0a25b6dSSongjun Wu }; 145e0a25b6dSSongjun Wu 146e0a25b6dSSongjun Wu static struct snd_soc_dai_driver atmel_classd_cpu_dai = { 147e0a25b6dSSongjun Wu .playback = { 14807c55d39SSongjun Wu .channels_min = 1, 149e0a25b6dSSongjun Wu .channels_max = 2, 150e0a25b6dSSongjun Wu .rates = ATMEL_CLASSD_RATES, 151e0a25b6dSSongjun Wu .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 152e0a25b6dSSongjun Wu .ops = &atmel_classd_cpu_dai_ops, 153e0a25b6dSSongjun Wu }; 154e0a25b6dSSongjun Wu 155e0a25b6dSSongjun Wu static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = { 156e0a25b6dSSongjun Wu .name = "atmel-classd", 157e0a25b6dSSongjun Wu }; 158e0a25b6dSSongjun Wu 159e0a25b6dSSongjun Wu /* platform */ 160e0a25b6dSSongjun Wu static int 161e0a25b6dSSongjun Wu atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream, 162e0a25b6dSSongjun Wu struct snd_pcm_hw_params *params, 163e0a25b6dSSongjun Wu struct dma_slave_config *slave_config) 164e0a25b6dSSongjun Wu { 165e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 166e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 167e0a25b6dSSongjun Wu 168e0a25b6dSSongjun Wu if (params_physical_width(params) != 16) { 1696dea9df8SKuninori Morimoto dev_err(dd->dev, 170e0a25b6dSSongjun Wu "only supports 16-bit audio data\n"); 171e0a25b6dSSongjun Wu return -EINVAL; 172e0a25b6dSSongjun Wu } 173e0a25b6dSSongjun Wu 17407c55d39SSongjun Wu if (params_channels(params) == 1) 17507c55d39SSongjun Wu slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; 17607c55d39SSongjun Wu else 17707c55d39SSongjun Wu slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 17807c55d39SSongjun Wu 179e0a25b6dSSongjun Wu slave_config->direction = DMA_MEM_TO_DEV; 180e0a25b6dSSongjun Wu slave_config->dst_addr = dd->phy_base + CLASSD_THR; 181e0a25b6dSSongjun Wu slave_config->dst_maxburst = 1; 182e0a25b6dSSongjun Wu slave_config->src_maxburst = 1; 183e0a25b6dSSongjun Wu slave_config->device_fc = false; 184e0a25b6dSSongjun Wu 185e0a25b6dSSongjun Wu return 0; 186e0a25b6dSSongjun Wu } 187e0a25b6dSSongjun Wu 188e0a25b6dSSongjun Wu static const struct snd_dmaengine_pcm_config 189e0a25b6dSSongjun Wu atmel_classd_dmaengine_pcm_config = { 190e0a25b6dSSongjun Wu .prepare_slave_config = atmel_classd_platform_configure_dma, 191e0a25b6dSSongjun Wu .pcm_hardware = &atmel_classd_hw, 192e0a25b6dSSongjun Wu .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE, 193e0a25b6dSSongjun Wu }; 194e0a25b6dSSongjun Wu 195e0a25b6dSSongjun Wu /* codec */ 196e0a25b6dSSongjun Wu static const char * const mono_mode_text[] = { 197e0a25b6dSSongjun Wu "mix", "sat", "left", "right" 198e0a25b6dSSongjun Wu }; 199e0a25b6dSSongjun Wu 200e0a25b6dSSongjun Wu static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum, 201e0a25b6dSSongjun Wu CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT, 202e0a25b6dSSongjun Wu mono_mode_text); 203e0a25b6dSSongjun Wu 204e0a25b6dSSongjun Wu static const char * const eqcfg_text[] = { 205e0a25b6dSSongjun Wu "Treble-12dB", "Treble-6dB", 206e0a25b6dSSongjun Wu "Medium-8dB", "Medium-3dB", 207e0a25b6dSSongjun Wu "Bass-12dB", "Bass-6dB", 208e0a25b6dSSongjun Wu "0 dB", 209e0a25b6dSSongjun Wu "Bass+6dB", "Bass+12dB", 210e0a25b6dSSongjun Wu "Medium+3dB", "Medium+8dB", 211e0a25b6dSSongjun Wu "Treble+6dB", "Treble+12dB", 212e0a25b6dSSongjun Wu }; 213e0a25b6dSSongjun Wu 214e0a25b6dSSongjun Wu static const unsigned int eqcfg_value[] = { 215e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6, 216e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3, 217e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6, 218e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_FLAT, 219e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12, 220e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8, 221e0a25b6dSSongjun Wu CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12, 222e0a25b6dSSongjun Wu }; 223e0a25b6dSSongjun Wu 224e0a25b6dSSongjun Wu static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum, 225e0a25b6dSSongjun Wu CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf, 226e0a25b6dSSongjun Wu eqcfg_text, eqcfg_value); 227e0a25b6dSSongjun Wu 228e0a25b6dSSongjun Wu static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1); 229e0a25b6dSSongjun Wu 230e0a25b6dSSongjun Wu static const struct snd_kcontrol_new atmel_classd_snd_controls[] = { 231e0a25b6dSSongjun Wu SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR, 232e0a25b6dSSongjun Wu CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT, 233e0a25b6dSSongjun Wu 78, 1, classd_digital_tlv), 234e0a25b6dSSongjun Wu 235e0a25b6dSSongjun Wu SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR, 236e0a25b6dSSongjun Wu CLASSD_INTPMR_DEEMP_SHIFT, 1, 0), 237e0a25b6dSSongjun Wu 238e0a25b6dSSongjun Wu SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0), 239e0a25b6dSSongjun Wu 240e0a25b6dSSongjun Wu SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0), 241e0a25b6dSSongjun Wu 242e0a25b6dSSongjun Wu SOC_ENUM("Mono Mode", classd_mono_mode_enum), 243e0a25b6dSSongjun Wu 244e0a25b6dSSongjun Wu SOC_ENUM("EQ", classd_eqcfg_enum), 245e0a25b6dSSongjun Wu }; 246e0a25b6dSSongjun Wu 247e0a25b6dSSongjun Wu static const char * const pwm_type[] = { 248e0a25b6dSSongjun Wu "Single ended", "Differential" 249e0a25b6dSSongjun Wu }; 250e0a25b6dSSongjun Wu 2511e8ba922SKuninori Morimoto static int atmel_classd_component_probe(struct snd_soc_component *component) 252e0a25b6dSSongjun Wu { 2531e8ba922SKuninori Morimoto struct snd_soc_card *card = snd_soc_component_get_drvdata(component); 254e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(card); 255e0a25b6dSSongjun Wu const struct atmel_classd_pdata *pdata = dd->pdata; 256e0a25b6dSSongjun Wu u32 mask, val; 257e0a25b6dSSongjun Wu 258e0a25b6dSSongjun Wu mask = CLASSD_MR_PWMTYP_MASK; 259e0a25b6dSSongjun Wu val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT; 260e0a25b6dSSongjun Wu 261e0a25b6dSSongjun Wu mask |= CLASSD_MR_NON_OVERLAP_MASK; 262e0a25b6dSSongjun Wu if (pdata->non_overlap_enable) { 263e0a25b6dSSongjun Wu val |= (CLASSD_MR_NON_OVERLAP_EN 264e0a25b6dSSongjun Wu << CLASSD_MR_NON_OVERLAP_SHIFT); 265e0a25b6dSSongjun Wu 266e0a25b6dSSongjun Wu mask |= CLASSD_MR_NOVR_VAL_MASK; 267e0a25b6dSSongjun Wu switch (pdata->non_overlap_time) { 268e0a25b6dSSongjun Wu case 5: 269e0a25b6dSSongjun Wu val |= (CLASSD_MR_NOVR_VAL_5NS 270e0a25b6dSSongjun Wu << CLASSD_MR_NOVR_VAL_SHIFT); 271e0a25b6dSSongjun Wu break; 272e0a25b6dSSongjun Wu case 10: 273e0a25b6dSSongjun Wu val |= (CLASSD_MR_NOVR_VAL_10NS 274e0a25b6dSSongjun Wu << CLASSD_MR_NOVR_VAL_SHIFT); 275e0a25b6dSSongjun Wu break; 276e0a25b6dSSongjun Wu case 15: 277e0a25b6dSSongjun Wu val |= (CLASSD_MR_NOVR_VAL_15NS 278e0a25b6dSSongjun Wu << CLASSD_MR_NOVR_VAL_SHIFT); 279e0a25b6dSSongjun Wu break; 280e0a25b6dSSongjun Wu case 20: 281e0a25b6dSSongjun Wu val |= (CLASSD_MR_NOVR_VAL_20NS 282e0a25b6dSSongjun Wu << CLASSD_MR_NOVR_VAL_SHIFT); 283e0a25b6dSSongjun Wu break; 284e0a25b6dSSongjun Wu default: 285e0a25b6dSSongjun Wu val |= (CLASSD_MR_NOVR_VAL_10NS 286e0a25b6dSSongjun Wu << CLASSD_MR_NOVR_VAL_SHIFT); 2871e8ba922SKuninori Morimoto dev_warn(component->dev, 288e0a25b6dSSongjun Wu "non-overlapping value %d is invalid, the default value 10 is specified\n", 289e0a25b6dSSongjun Wu pdata->non_overlap_time); 290e0a25b6dSSongjun Wu break; 291e0a25b6dSSongjun Wu } 292e0a25b6dSSongjun Wu } 293e0a25b6dSSongjun Wu 2941e8ba922SKuninori Morimoto snd_soc_component_update_bits(component, CLASSD_MR, mask, val); 295e0a25b6dSSongjun Wu 2961e8ba922SKuninori Morimoto dev_info(component->dev, 297e0a25b6dSSongjun Wu "PWM modulation type is %s, non-overlapping is %s\n", 298e0a25b6dSSongjun Wu pwm_type[pdata->pwm_type], 299e0a25b6dSSongjun Wu pdata->non_overlap_enable?"enabled":"disabled"); 300e0a25b6dSSongjun Wu 301e0a25b6dSSongjun Wu return 0; 302e0a25b6dSSongjun Wu } 303e0a25b6dSSongjun Wu 3041e8ba922SKuninori Morimoto static int atmel_classd_component_resume(struct snd_soc_component *component) 30561abce13SQuentin Schulz { 3061e8ba922SKuninori Morimoto struct snd_soc_card *card = snd_soc_component_get_drvdata(component); 30761abce13SQuentin Schulz struct atmel_classd *dd = snd_soc_card_get_drvdata(card); 30861abce13SQuentin Schulz 30961abce13SQuentin Schulz return regcache_sync(dd->regmap); 31061abce13SQuentin Schulz } 31161abce13SQuentin Schulz 3121e8ba922SKuninori Morimoto static struct snd_soc_component_driver soc_component_dev_classd = { 3131e8ba922SKuninori Morimoto .probe = atmel_classd_component_probe, 3141e8ba922SKuninori Morimoto .resume = atmel_classd_component_resume, 315e0a25b6dSSongjun Wu .controls = atmel_classd_snd_controls, 316e0a25b6dSSongjun Wu .num_controls = ARRAY_SIZE(atmel_classd_snd_controls), 3171e8ba922SKuninori Morimoto .idle_bias_on = 1, 3181e8ba922SKuninori Morimoto .use_pmdown_time = 1, 3191e8ba922SKuninori Morimoto .endianness = 1, 3201e8ba922SKuninori Morimoto .non_legacy_dai_naming = 1, 321e0a25b6dSSongjun Wu }; 322e0a25b6dSSongjun Wu 323e0a25b6dSSongjun Wu /* codec dai component */ 324e0a25b6dSSongjun Wu static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream, 325e0a25b6dSSongjun Wu struct snd_soc_dai *codec_dai) 326e0a25b6dSSongjun Wu { 327e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 328e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 329e0a25b6dSSongjun Wu 330e0a25b6dSSongjun Wu return clk_prepare_enable(dd->gclk); 331e0a25b6dSSongjun Wu } 332e0a25b6dSSongjun Wu 333e0a25b6dSSongjun Wu static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai, 334e0a25b6dSSongjun Wu int mute) 335e0a25b6dSSongjun Wu { 3361e8ba922SKuninori Morimoto struct snd_soc_component *component = codec_dai->component; 337e0a25b6dSSongjun Wu u32 mask, val; 338e0a25b6dSSongjun Wu 339e0a25b6dSSongjun Wu mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK; 340e0a25b6dSSongjun Wu 341e0a25b6dSSongjun Wu if (mute) 342e0a25b6dSSongjun Wu val = mask; 343e0a25b6dSSongjun Wu else 344e0a25b6dSSongjun Wu val = 0; 345e0a25b6dSSongjun Wu 3461e8ba922SKuninori Morimoto snd_soc_component_update_bits(component, CLASSD_MR, mask, val); 347e0a25b6dSSongjun Wu 348e0a25b6dSSongjun Wu return 0; 349e0a25b6dSSongjun Wu } 350e0a25b6dSSongjun Wu 3514ab6cf11SQuentin Schulz #define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8) 3524ab6cf11SQuentin Schulz #define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8) 353e0a25b6dSSongjun Wu 354e0a25b6dSSongjun Wu static struct { 355e0a25b6dSSongjun Wu int rate; 356e0a25b6dSSongjun Wu int sample_rate; 357e0a25b6dSSongjun Wu int dsp_clk; 3584ab6cf11SQuentin Schulz unsigned long gclk_rate; 359e0a25b6dSSongjun Wu } const sample_rates[] = { 360e0a25b6dSSongjun Wu { 8000, CLASSD_INTPMR_FRAME_8K, 3614ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, 362e0a25b6dSSongjun Wu { 16000, CLASSD_INTPMR_FRAME_16K, 3634ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, 364e0a25b6dSSongjun Wu { 32000, CLASSD_INTPMR_FRAME_32K, 3654ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, 366e0a25b6dSSongjun Wu { 48000, CLASSD_INTPMR_FRAME_48K, 3674ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, 368e0a25b6dSSongjun Wu { 96000, CLASSD_INTPMR_FRAME_96K, 3694ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, 370e0a25b6dSSongjun Wu { 22050, CLASSD_INTPMR_FRAME_22K, 3714ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, 372e0a25b6dSSongjun Wu { 44100, CLASSD_INTPMR_FRAME_44K, 3734ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, 374e0a25b6dSSongjun Wu { 88200, CLASSD_INTPMR_FRAME_88K, 3754ab6cf11SQuentin Schulz CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, 376e0a25b6dSSongjun Wu }; 377e0a25b6dSSongjun Wu 378e0a25b6dSSongjun Wu static int 379e0a25b6dSSongjun Wu atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream, 380e0a25b6dSSongjun Wu struct snd_pcm_hw_params *params, 381e0a25b6dSSongjun Wu struct snd_soc_dai *codec_dai) 382e0a25b6dSSongjun Wu { 383e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 384e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 3851e8ba922SKuninori Morimoto struct snd_soc_component *component = codec_dai->component; 386e0a25b6dSSongjun Wu int fs; 387e0a25b6dSSongjun Wu int i, best, best_val, cur_val, ret; 388e0a25b6dSSongjun Wu u32 mask, val; 389e0a25b6dSSongjun Wu 390e0a25b6dSSongjun Wu fs = params_rate(params); 391e0a25b6dSSongjun Wu 392e0a25b6dSSongjun Wu best = 0; 393e0a25b6dSSongjun Wu best_val = abs(fs - sample_rates[0].rate); 394e0a25b6dSSongjun Wu for (i = 1; i < ARRAY_SIZE(sample_rates); i++) { 395e0a25b6dSSongjun Wu /* Closest match */ 396e0a25b6dSSongjun Wu cur_val = abs(fs - sample_rates[i].rate); 397e0a25b6dSSongjun Wu if (cur_val < best_val) { 398e0a25b6dSSongjun Wu best = i; 399e0a25b6dSSongjun Wu best_val = cur_val; 400e0a25b6dSSongjun Wu } 401e0a25b6dSSongjun Wu } 402e0a25b6dSSongjun Wu 4031e8ba922SKuninori Morimoto dev_dbg(component->dev, 4044ab6cf11SQuentin Schulz "Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n", 4054ab6cf11SQuentin Schulz sample_rates[best].rate, sample_rates[best].gclk_rate); 406e0a25b6dSSongjun Wu 407e0a25b6dSSongjun Wu clk_disable_unprepare(dd->gclk); 408e0a25b6dSSongjun Wu 4094ab6cf11SQuentin Schulz ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate); 410e0a25b6dSSongjun Wu if (ret) 411e0a25b6dSSongjun Wu return ret; 412e0a25b6dSSongjun Wu 413e0a25b6dSSongjun Wu mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK; 414e0a25b6dSSongjun Wu val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT) 415e0a25b6dSSongjun Wu | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT); 416e0a25b6dSSongjun Wu 4171e8ba922SKuninori Morimoto snd_soc_component_update_bits(component, CLASSD_INTPMR, mask, val); 418e0a25b6dSSongjun Wu 419e0a25b6dSSongjun Wu return clk_prepare_enable(dd->gclk); 420e0a25b6dSSongjun Wu } 421e0a25b6dSSongjun Wu 422e0a25b6dSSongjun Wu static void 423e0a25b6dSSongjun Wu atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream, 424e0a25b6dSSongjun Wu struct snd_soc_dai *codec_dai) 425e0a25b6dSSongjun Wu { 426e0a25b6dSSongjun Wu struct snd_soc_pcm_runtime *rtd = substream->private_data; 427e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 428e0a25b6dSSongjun Wu 429e0a25b6dSSongjun Wu clk_disable_unprepare(dd->gclk); 430e0a25b6dSSongjun Wu } 431e0a25b6dSSongjun Wu 432e0a25b6dSSongjun Wu static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream, 433e0a25b6dSSongjun Wu struct snd_soc_dai *codec_dai) 434e0a25b6dSSongjun Wu { 4351e8ba922SKuninori Morimoto struct snd_soc_component *component = codec_dai->component; 436e0a25b6dSSongjun Wu 4371e8ba922SKuninori Morimoto snd_soc_component_update_bits(component, CLASSD_MR, 438e0a25b6dSSongjun Wu CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK, 439e0a25b6dSSongjun Wu (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) 440e0a25b6dSSongjun Wu |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT)); 441e0a25b6dSSongjun Wu 442e0a25b6dSSongjun Wu return 0; 443e0a25b6dSSongjun Wu } 444e0a25b6dSSongjun Wu 445e0a25b6dSSongjun Wu static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream, 446e0a25b6dSSongjun Wu int cmd, struct snd_soc_dai *codec_dai) 447e0a25b6dSSongjun Wu { 4481e8ba922SKuninori Morimoto struct snd_soc_component *component = codec_dai->component; 449e0a25b6dSSongjun Wu u32 mask, val; 450e0a25b6dSSongjun Wu 451e0a25b6dSSongjun Wu mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK; 452e0a25b6dSSongjun Wu 453e0a25b6dSSongjun Wu switch (cmd) { 454e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_START: 455e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_RESUME: 456e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 457e0a25b6dSSongjun Wu val = mask; 458e0a25b6dSSongjun Wu break; 459e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_STOP: 460e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_SUSPEND: 461e0a25b6dSSongjun Wu case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 462e0a25b6dSSongjun Wu val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) 463e0a25b6dSSongjun Wu | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT); 464e0a25b6dSSongjun Wu break; 465e0a25b6dSSongjun Wu default: 466e0a25b6dSSongjun Wu return -EINVAL; 467e0a25b6dSSongjun Wu } 468e0a25b6dSSongjun Wu 4691e8ba922SKuninori Morimoto snd_soc_component_update_bits(component, CLASSD_MR, mask, val); 470e0a25b6dSSongjun Wu 471e0a25b6dSSongjun Wu return 0; 472e0a25b6dSSongjun Wu } 473e0a25b6dSSongjun Wu 474e0a25b6dSSongjun Wu static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = { 475e0a25b6dSSongjun Wu .digital_mute = atmel_classd_codec_dai_digital_mute, 476e0a25b6dSSongjun Wu .startup = atmel_classd_codec_dai_startup, 477e0a25b6dSSongjun Wu .shutdown = atmel_classd_codec_dai_shutdown, 478e0a25b6dSSongjun Wu .hw_params = atmel_classd_codec_dai_hw_params, 479e0a25b6dSSongjun Wu .prepare = atmel_classd_codec_dai_prepare, 480e0a25b6dSSongjun Wu .trigger = atmel_classd_codec_dai_trigger, 481e0a25b6dSSongjun Wu }; 482e0a25b6dSSongjun Wu 483e0a25b6dSSongjun Wu #define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi" 484e0a25b6dSSongjun Wu 485e0a25b6dSSongjun Wu static struct snd_soc_dai_driver atmel_classd_codec_dai = { 486e0a25b6dSSongjun Wu .name = ATMEL_CLASSD_CODEC_DAI_NAME, 487e0a25b6dSSongjun Wu .playback = { 488e0a25b6dSSongjun Wu .stream_name = "Playback", 48907c55d39SSongjun Wu .channels_min = 1, 490e0a25b6dSSongjun Wu .channels_max = 2, 491e0a25b6dSSongjun Wu .rates = ATMEL_CLASSD_RATES, 492e0a25b6dSSongjun Wu .formats = SNDRV_PCM_FMTBIT_S16_LE, 493e0a25b6dSSongjun Wu }, 494e0a25b6dSSongjun Wu .ops = &atmel_classd_codec_dai_ops, 495e0a25b6dSSongjun Wu }; 496e0a25b6dSSongjun Wu 497e0a25b6dSSongjun Wu /* ASoC sound card */ 498e0a25b6dSSongjun Wu static int atmel_classd_asoc_card_init(struct device *dev, 499e0a25b6dSSongjun Wu struct snd_soc_card *card) 500e0a25b6dSSongjun Wu { 501e0a25b6dSSongjun Wu struct snd_soc_dai_link *dai_link; 502e0a25b6dSSongjun Wu struct atmel_classd *dd = snd_soc_card_get_drvdata(card); 5033d14a1dfSKuninori Morimoto struct snd_soc_dai_link_component *comp; 504e0a25b6dSSongjun Wu 505e0a25b6dSSongjun Wu dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); 506e0a25b6dSSongjun Wu if (!dai_link) 507e0a25b6dSSongjun Wu return -ENOMEM; 508e0a25b6dSSongjun Wu 5093d14a1dfSKuninori Morimoto comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL); 5103d14a1dfSKuninori Morimoto if (!comp) 5113d14a1dfSKuninori Morimoto return -ENOMEM; 5123d14a1dfSKuninori Morimoto 5133d14a1dfSKuninori Morimoto dai_link->cpus = &comp[0]; 5143d14a1dfSKuninori Morimoto dai_link->codecs = &comp[1]; 5153d14a1dfSKuninori Morimoto dai_link->platforms = &comp[2]; 5163d14a1dfSKuninori Morimoto 5173d14a1dfSKuninori Morimoto dai_link->num_cpus = 1; 5183d14a1dfSKuninori Morimoto dai_link->num_codecs = 1; 5193d14a1dfSKuninori Morimoto dai_link->num_platforms = 1; 5203d14a1dfSKuninori Morimoto 521e0a25b6dSSongjun Wu dai_link->name = "CLASSD"; 522e0a25b6dSSongjun Wu dai_link->stream_name = "CLASSD PCM"; 5233d14a1dfSKuninori Morimoto dai_link->codecs->dai_name = ATMEL_CLASSD_CODEC_DAI_NAME; 5243d14a1dfSKuninori Morimoto dai_link->cpus->dai_name = dev_name(dev); 5253d14a1dfSKuninori Morimoto dai_link->codecs->name = dev_name(dev); 5263d14a1dfSKuninori Morimoto dai_link->platforms->name = dev_name(dev); 527e0a25b6dSSongjun Wu 528e0a25b6dSSongjun Wu card->dai_link = dai_link; 529e0a25b6dSSongjun Wu card->num_links = 1; 530e0a25b6dSSongjun Wu card->name = dd->pdata->card_name; 531e0a25b6dSSongjun Wu card->dev = dev; 532e0a25b6dSSongjun Wu 533e0a25b6dSSongjun Wu return 0; 534e0a25b6dSSongjun Wu }; 535e0a25b6dSSongjun Wu 536e0a25b6dSSongjun Wu /* regmap configuration */ 537e0a25b6dSSongjun Wu static const struct reg_default atmel_classd_reg_defaults[] = { 538e0a25b6dSSongjun Wu { CLASSD_INTPMR, 0x00301212 }, 539e0a25b6dSSongjun Wu }; 540e0a25b6dSSongjun Wu 541e0a25b6dSSongjun Wu #define ATMEL_CLASSD_REG_MAX 0xE4 542e0a25b6dSSongjun Wu static const struct regmap_config atmel_classd_regmap_config = { 543e0a25b6dSSongjun Wu .reg_bits = 32, 544e0a25b6dSSongjun Wu .reg_stride = 4, 545e0a25b6dSSongjun Wu .val_bits = 32, 546e0a25b6dSSongjun Wu .max_register = ATMEL_CLASSD_REG_MAX, 547e0a25b6dSSongjun Wu 548e0a25b6dSSongjun Wu .cache_type = REGCACHE_FLAT, 549e0a25b6dSSongjun Wu .reg_defaults = atmel_classd_reg_defaults, 550e0a25b6dSSongjun Wu .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults), 551e0a25b6dSSongjun Wu }; 552e0a25b6dSSongjun Wu 553e0a25b6dSSongjun Wu static int atmel_classd_probe(struct platform_device *pdev) 554e0a25b6dSSongjun Wu { 555e0a25b6dSSongjun Wu struct device *dev = &pdev->dev; 556e0a25b6dSSongjun Wu struct atmel_classd *dd; 557e0a25b6dSSongjun Wu struct resource *res; 558e0a25b6dSSongjun Wu void __iomem *io_base; 559e0a25b6dSSongjun Wu const struct atmel_classd_pdata *pdata; 560e0a25b6dSSongjun Wu struct snd_soc_card *card; 561e0a25b6dSSongjun Wu int ret; 562e0a25b6dSSongjun Wu 563e0a25b6dSSongjun Wu pdata = dev_get_platdata(dev); 564e0a25b6dSSongjun Wu if (!pdata) { 565e0a25b6dSSongjun Wu pdata = atmel_classd_dt_init(dev); 566e0a25b6dSSongjun Wu if (IS_ERR(pdata)) 567e0a25b6dSSongjun Wu return PTR_ERR(pdata); 568e0a25b6dSSongjun Wu } 569e0a25b6dSSongjun Wu 570e0a25b6dSSongjun Wu dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); 571e0a25b6dSSongjun Wu if (!dd) 572e0a25b6dSSongjun Wu return -ENOMEM; 573e0a25b6dSSongjun Wu 574e0a25b6dSSongjun Wu dd->pdata = pdata; 575e0a25b6dSSongjun Wu 576e0a25b6dSSongjun Wu dd->irq = platform_get_irq(pdev, 0); 577e0a25b6dSSongjun Wu if (dd->irq < 0) { 578e0a25b6dSSongjun Wu ret = dd->irq; 579e0a25b6dSSongjun Wu dev_err(dev, "failed to could not get irq: %d\n", ret); 580e0a25b6dSSongjun Wu return ret; 581e0a25b6dSSongjun Wu } 582e0a25b6dSSongjun Wu 583e0a25b6dSSongjun Wu dd->pclk = devm_clk_get(dev, "pclk"); 584e0a25b6dSSongjun Wu if (IS_ERR(dd->pclk)) { 585e0a25b6dSSongjun Wu ret = PTR_ERR(dd->pclk); 586e0a25b6dSSongjun Wu dev_err(dev, "failed to get peripheral clock: %d\n", ret); 587e0a25b6dSSongjun Wu return ret; 588e0a25b6dSSongjun Wu } 589e0a25b6dSSongjun Wu 590e0a25b6dSSongjun Wu dd->gclk = devm_clk_get(dev, "gclk"); 591e0a25b6dSSongjun Wu if (IS_ERR(dd->gclk)) { 592e0a25b6dSSongjun Wu ret = PTR_ERR(dd->gclk); 593e0a25b6dSSongjun Wu dev_err(dev, "failed to get GCK clock: %d\n", ret); 594e0a25b6dSSongjun Wu return ret; 595e0a25b6dSSongjun Wu } 596e0a25b6dSSongjun Wu 597e0a25b6dSSongjun Wu res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 598e0a25b6dSSongjun Wu io_base = devm_ioremap_resource(dev, res); 5991f598e68SLadislav Michl if (IS_ERR(io_base)) 6001f598e68SLadislav Michl return PTR_ERR(io_base); 601e0a25b6dSSongjun Wu 602e0a25b6dSSongjun Wu dd->phy_base = res->start; 6036dea9df8SKuninori Morimoto dd->dev = dev; 604e0a25b6dSSongjun Wu 605e0a25b6dSSongjun Wu dd->regmap = devm_regmap_init_mmio(dev, io_base, 606e0a25b6dSSongjun Wu &atmel_classd_regmap_config); 607e0a25b6dSSongjun Wu if (IS_ERR(dd->regmap)) { 608e0a25b6dSSongjun Wu ret = PTR_ERR(dd->regmap); 609e0a25b6dSSongjun Wu dev_err(dev, "failed to init register map: %d\n", ret); 610e0a25b6dSSongjun Wu return ret; 611e0a25b6dSSongjun Wu } 612e0a25b6dSSongjun Wu 613e0a25b6dSSongjun Wu ret = devm_snd_soc_register_component(dev, 614e0a25b6dSSongjun Wu &atmel_classd_cpu_dai_component, 615e0a25b6dSSongjun Wu &atmel_classd_cpu_dai, 1); 616e0a25b6dSSongjun Wu if (ret) { 617e0a25b6dSSongjun Wu dev_err(dev, "could not register CPU DAI: %d\n", ret); 618e0a25b6dSSongjun Wu return ret; 619e0a25b6dSSongjun Wu } 620e0a25b6dSSongjun Wu 621e0a25b6dSSongjun Wu ret = devm_snd_dmaengine_pcm_register(dev, 622e0a25b6dSSongjun Wu &atmel_classd_dmaengine_pcm_config, 623e0a25b6dSSongjun Wu 0); 624e0a25b6dSSongjun Wu if (ret) { 625e0a25b6dSSongjun Wu dev_err(dev, "could not register platform: %d\n", ret); 626e0a25b6dSSongjun Wu return ret; 627e0a25b6dSSongjun Wu } 628e0a25b6dSSongjun Wu 6291e8ba922SKuninori Morimoto ret = devm_snd_soc_register_component(dev, &soc_component_dev_classd, 630e0a25b6dSSongjun Wu &atmel_classd_codec_dai, 1); 631e0a25b6dSSongjun Wu if (ret) { 6321e8ba922SKuninori Morimoto dev_err(dev, "could not register component: %d\n", ret); 633e0a25b6dSSongjun Wu return ret; 634e0a25b6dSSongjun Wu } 635e0a25b6dSSongjun Wu 636e0a25b6dSSongjun Wu /* register sound card */ 637e0a25b6dSSongjun Wu card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 63832e69badSSongjun Wu if (!card) { 63932e69badSSongjun Wu ret = -ENOMEM; 64032e69badSSongjun Wu goto unregister_codec; 64132e69badSSongjun Wu } 642e0a25b6dSSongjun Wu 643e0a25b6dSSongjun Wu snd_soc_card_set_drvdata(card, dd); 644e0a25b6dSSongjun Wu 645e0a25b6dSSongjun Wu ret = atmel_classd_asoc_card_init(dev, card); 646e0a25b6dSSongjun Wu if (ret) { 647e0a25b6dSSongjun Wu dev_err(dev, "failed to init sound card\n"); 64832e69badSSongjun Wu goto unregister_codec; 649e0a25b6dSSongjun Wu } 650e0a25b6dSSongjun Wu 651e0a25b6dSSongjun Wu ret = devm_snd_soc_register_card(dev, card); 652e0a25b6dSSongjun Wu if (ret) { 653e0a25b6dSSongjun Wu dev_err(dev, "failed to register sound card: %d\n", ret); 65432e69badSSongjun Wu goto unregister_codec; 655e0a25b6dSSongjun Wu } 656e0a25b6dSSongjun Wu 657e0a25b6dSSongjun Wu return 0; 65832e69badSSongjun Wu 65932e69badSSongjun Wu unregister_codec: 66032e69badSSongjun Wu return ret; 661e0a25b6dSSongjun Wu } 662e0a25b6dSSongjun Wu 663e0a25b6dSSongjun Wu static int atmel_classd_remove(struct platform_device *pdev) 664e0a25b6dSSongjun Wu { 665e0a25b6dSSongjun Wu return 0; 666e0a25b6dSSongjun Wu } 667e0a25b6dSSongjun Wu 668e0a25b6dSSongjun Wu static struct platform_driver atmel_classd_driver = { 669e0a25b6dSSongjun Wu .driver = { 670e0a25b6dSSongjun Wu .name = "atmel-classd", 671e0a25b6dSSongjun Wu .of_match_table = of_match_ptr(atmel_classd_of_match), 672e0a25b6dSSongjun Wu .pm = &snd_soc_pm_ops, 673e0a25b6dSSongjun Wu }, 674e0a25b6dSSongjun Wu .probe = atmel_classd_probe, 675e0a25b6dSSongjun Wu .remove = atmel_classd_remove, 676e0a25b6dSSongjun Wu }; 677e0a25b6dSSongjun Wu module_platform_driver(atmel_classd_driver); 678e0a25b6dSSongjun Wu 679e0a25b6dSSongjun Wu MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture"); 680e0a25b6dSSongjun Wu MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>"); 681e0a25b6dSSongjun Wu MODULE_LICENSE("GPL"); 682