Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Freescale ALSA SoC Digital Audio Interface (SAI) driver. |
| 3 | * |
| 4 | * Copyright 2012-2013 Freescale Semiconductor, Inc. |
| 5 | * |
| 6 | * This program is free software, you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation, either version 2 of the License, or(at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/clk.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/dmaengine.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/of_address.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <sound/core.h> |
| 20 | #include <sound/dmaengine_pcm.h> |
| 21 | #include <sound/pcm_params.h> |
| 22 | |
| 23 | #include "fsl_sai.h" |
| 24 | |
| 25 | static inline u32 sai_readl(struct fsl_sai *sai, |
| 26 | const void __iomem *addr) |
| 27 | { |
| 28 | u32 val; |
| 29 | |
| 30 | val = __raw_readl(addr); |
| 31 | |
| 32 | if (likely(sai->big_endian_regs)) |
| 33 | val = be32_to_cpu(val); |
| 34 | else |
| 35 | val = le32_to_cpu(val); |
| 36 | rmb(); |
| 37 | |
| 38 | return val; |
| 39 | } |
| 40 | |
| 41 | static inline void sai_writel(struct fsl_sai *sai, |
| 42 | u32 val, void __iomem *addr) |
| 43 | { |
| 44 | wmb(); |
| 45 | if (likely(sai->big_endian_regs)) |
| 46 | val = cpu_to_be32(val); |
| 47 | else |
| 48 | val = cpu_to_le32(val); |
| 49 | |
| 50 | __raw_writel(val, addr); |
| 51 | } |
| 52 | |
| 53 | static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, |
| 54 | int clk_id, unsigned int freq, int fsl_dir) |
| 55 | { |
| 56 | u32 val_cr2, reg_cr2; |
| 57 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 58 | |
| 59 | if (fsl_dir == FSL_FMT_TRANSMITTER) |
| 60 | reg_cr2 = FSL_SAI_TCR2; |
| 61 | else |
| 62 | reg_cr2 = FSL_SAI_RCR2; |
| 63 | |
| 64 | val_cr2 = sai_readl(sai, sai->base + reg_cr2); |
| 65 | switch (clk_id) { |
| 66 | case FSL_SAI_CLK_BUS: |
| 67 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 68 | val_cr2 |= FSL_SAI_CR2_MSEL_BUS; |
| 69 | break; |
| 70 | case FSL_SAI_CLK_MAST1: |
| 71 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 72 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1; |
| 73 | break; |
| 74 | case FSL_SAI_CLK_MAST2: |
| 75 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 76 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2; |
| 77 | break; |
| 78 | case FSL_SAI_CLK_MAST3: |
| 79 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 80 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3; |
| 81 | break; |
| 82 | default: |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | sai_writel(sai, val_cr2, sai->base + reg_cr2); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, |
| 91 | int clk_id, unsigned int freq, int dir) |
| 92 | { |
| 93 | int ret; |
| 94 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 95 | |
| 96 | if (dir == SND_SOC_CLOCK_IN) |
| 97 | return 0; |
| 98 | |
| 99 | ret = clk_prepare_enable(sai->clk); |
| 100 | if (ret) |
| 101 | return ret; |
| 102 | |
| 103 | sai_writel(sai, 0x0, sai->base + FSL_SAI_RCSR); |
| 104 | sai_writel(sai, 0x0, sai->base + FSL_SAI_TCSR); |
| 105 | sai_writel(sai, FSL_SAI_MAXBURST_TX * 2, sai->base + FSL_SAI_TCR1); |
| 106 | sai_writel(sai, FSL_SAI_MAXBURST_RX - 1, sai->base + FSL_SAI_RCR1); |
| 107 | |
| 108 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 109 | FSL_FMT_TRANSMITTER); |
| 110 | if (ret) { |
| 111 | dev_err(cpu_dai->dev, |
| 112 | "Cannot set SAI's transmitter sysclk: %d\n", |
| 113 | ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 114 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 118 | FSL_FMT_RECEIVER); |
| 119 | if (ret) { |
| 120 | dev_err(cpu_dai->dev, |
| 121 | "Cannot set SAI's receiver sysclk: %d\n", |
| 122 | ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 123 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 124 | } |
| 125 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 126 | err_clk: |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 127 | clk_disable_unprepare(sai->clk); |
| 128 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 129 | return ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, |
| 133 | unsigned int fmt, int fsl_dir) |
| 134 | { |
| 135 | u32 val_cr2, val_cr3, val_cr4, reg_cr2, reg_cr3, reg_cr4; |
| 136 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 137 | |
| 138 | if (fsl_dir == FSL_FMT_TRANSMITTER) { |
| 139 | reg_cr2 = FSL_SAI_TCR2; |
| 140 | reg_cr3 = FSL_SAI_TCR3; |
| 141 | reg_cr4 = FSL_SAI_TCR4; |
| 142 | } else { |
| 143 | reg_cr2 = FSL_SAI_RCR2; |
| 144 | reg_cr3 = FSL_SAI_RCR3; |
| 145 | reg_cr4 = FSL_SAI_RCR4; |
| 146 | } |
| 147 | |
| 148 | val_cr2 = sai_readl(sai, sai->base + reg_cr2); |
| 149 | val_cr3 = sai_readl(sai, sai->base + reg_cr3); |
| 150 | val_cr4 = sai_readl(sai, sai->base + reg_cr4); |
| 151 | |
| 152 | if (sai->big_endian_data) |
| 153 | val_cr4 |= FSL_SAI_CR4_MF; |
| 154 | else |
| 155 | val_cr4 &= ~FSL_SAI_CR4_MF; |
| 156 | |
| 157 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 158 | case SND_SOC_DAIFMT_I2S: |
| 159 | val_cr4 |= FSL_SAI_CR4_FSE; |
| 160 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 161 | break; |
| 162 | default: |
| 163 | return -EINVAL; |
| 164 | } |
| 165 | |
| 166 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 167 | case SND_SOC_DAIFMT_IB_IF: |
| 168 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 169 | val_cr2 &= ~FSL_SAI_CR2_BCP; |
| 170 | break; |
| 171 | case SND_SOC_DAIFMT_IB_NF: |
| 172 | val_cr4 &= ~FSL_SAI_CR4_FSP; |
| 173 | val_cr2 &= ~FSL_SAI_CR2_BCP; |
| 174 | break; |
| 175 | case SND_SOC_DAIFMT_NB_IF: |
| 176 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 177 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 178 | break; |
| 179 | case SND_SOC_DAIFMT_NB_NF: |
| 180 | val_cr4 &= ~FSL_SAI_CR4_FSP; |
| 181 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 182 | break; |
| 183 | default: |
| 184 | return -EINVAL; |
| 185 | } |
| 186 | |
| 187 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 188 | case SND_SOC_DAIFMT_CBS_CFS: |
| 189 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; |
| 190 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; |
| 191 | break; |
| 192 | case SND_SOC_DAIFMT_CBM_CFM: |
| 193 | val_cr2 &= ~FSL_SAI_CR2_BCD_MSTR; |
| 194 | val_cr4 &= ~FSL_SAI_CR4_FSD_MSTR; |
| 195 | break; |
| 196 | default: |
| 197 | return -EINVAL; |
| 198 | } |
| 199 | |
| 200 | val_cr3 |= FSL_SAI_CR3_TRCE; |
| 201 | |
| 202 | if (fsl_dir == FSL_FMT_RECEIVER) |
| 203 | val_cr2 |= FSL_SAI_CR2_SYNC; |
| 204 | |
| 205 | sai_writel(sai, val_cr2, sai->base + reg_cr2); |
| 206 | sai_writel(sai, val_cr3, sai->base + reg_cr3); |
| 207 | sai_writel(sai, val_cr4, sai->base + reg_cr4); |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) |
| 213 | { |
| 214 | int ret; |
| 215 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 216 | |
| 217 | ret = clk_prepare_enable(sai->clk); |
| 218 | if (ret) |
| 219 | return ret; |
| 220 | |
| 221 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER); |
| 222 | if (ret) { |
| 223 | dev_err(cpu_dai->dev, |
| 224 | "Cannot set SAI's transmitter format: %d\n", |
| 225 | ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 226 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER); |
| 230 | if (ret) { |
| 231 | dev_err(cpu_dai->dev, |
| 232 | "Cannot set SAI's receiver format: %d\n", |
| 233 | ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 234 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 235 | } |
| 236 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 237 | err_clk: |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 238 | clk_disable_unprepare(sai->clk); |
| 239 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 240 | return ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | static int fsl_sai_hw_params(struct snd_pcm_substream *substream, |
| 244 | struct snd_pcm_hw_params *params, |
| 245 | struct snd_soc_dai *cpu_dai) |
| 246 | { |
Nicolin Chen | 1d70030 | 2013-12-20 16:41:01 +0800 | [diff] [blame^] | 247 | u32 val_cr4, val_cr5, val_mr, reg_cr4, reg_cr5, reg_mr; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 248 | unsigned int channels = params_channels(params); |
| 249 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Nicolin Chen | 1d70030 | 2013-12-20 16:41:01 +0800 | [diff] [blame^] | 250 | u32 word_width = snd_pcm_format_width(params_format(params)); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 251 | |
| 252 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 253 | reg_cr4 = FSL_SAI_TCR4; |
| 254 | reg_cr5 = FSL_SAI_TCR5; |
| 255 | reg_mr = FSL_SAI_TMR; |
| 256 | } else { |
| 257 | reg_cr4 = FSL_SAI_RCR4; |
| 258 | reg_cr5 = FSL_SAI_RCR5; |
| 259 | reg_mr = FSL_SAI_RMR; |
| 260 | } |
| 261 | |
| 262 | val_cr4 = sai_readl(sai, sai->base + reg_cr4); |
| 263 | val_cr4 &= ~FSL_SAI_CR4_SYWD_MASK; |
| 264 | val_cr4 &= ~FSL_SAI_CR4_FRSZ_MASK; |
| 265 | |
| 266 | val_cr5 = sai_readl(sai, sai->base + reg_cr5); |
| 267 | val_cr5 &= ~FSL_SAI_CR5_WNW_MASK; |
| 268 | val_cr5 &= ~FSL_SAI_CR5_W0W_MASK; |
| 269 | val_cr5 &= ~FSL_SAI_CR5_FBT_MASK; |
| 270 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 271 | val_cr4 |= FSL_SAI_CR4_SYWD(word_width); |
| 272 | val_cr5 |= FSL_SAI_CR5_WNW(word_width); |
| 273 | val_cr5 |= FSL_SAI_CR5_W0W(word_width); |
| 274 | |
| 275 | if (sai->big_endian_data) |
| 276 | val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1); |
| 277 | else |
| 278 | val_cr5 |= FSL_SAI_CR5_FBT(0); |
| 279 | |
| 280 | val_cr4 |= FSL_SAI_CR4_FRSZ(channels); |
| 281 | if (channels == 2 || channels == 1) |
| 282 | val_mr = ~0UL - ((1 << channels) - 1); |
| 283 | else |
| 284 | return -EINVAL; |
| 285 | |
| 286 | sai_writel(sai, val_cr4, sai->base + reg_cr4); |
| 287 | sai_writel(sai, val_cr5, sai->base + reg_cr5); |
| 288 | sai_writel(sai, val_mr, sai->base + reg_mr); |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, |
| 294 | struct snd_soc_dai *cpu_dai) |
| 295 | { |
| 296 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 297 | unsigned int tcsr, rcsr; |
| 298 | |
| 299 | tcsr = sai_readl(sai, sai->base + FSL_SAI_TCSR); |
| 300 | rcsr = sai_readl(sai, sai->base + FSL_SAI_RCSR); |
| 301 | |
| 302 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 303 | tcsr |= FSL_SAI_CSR_FRDE; |
| 304 | rcsr &= ~FSL_SAI_CSR_FRDE; |
| 305 | } else { |
| 306 | rcsr |= FSL_SAI_CSR_FRDE; |
| 307 | tcsr &= ~FSL_SAI_CSR_FRDE; |
| 308 | } |
| 309 | |
| 310 | switch (cmd) { |
| 311 | case SNDRV_PCM_TRIGGER_START: |
| 312 | case SNDRV_PCM_TRIGGER_RESUME: |
| 313 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 314 | tcsr |= FSL_SAI_CSR_TERE; |
| 315 | rcsr |= FSL_SAI_CSR_TERE; |
| 316 | sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR); |
| 317 | sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR); |
| 318 | break; |
| 319 | |
| 320 | case SNDRV_PCM_TRIGGER_STOP: |
| 321 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 322 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 323 | if (!(cpu_dai->playback_active || cpu_dai->capture_active)) { |
| 324 | tcsr &= ~FSL_SAI_CSR_TERE; |
| 325 | rcsr &= ~FSL_SAI_CSR_TERE; |
| 326 | } |
| 327 | sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR); |
| 328 | sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR); |
| 329 | break; |
| 330 | default: |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static int fsl_sai_startup(struct snd_pcm_substream *substream, |
| 338 | struct snd_soc_dai *cpu_dai) |
| 339 | { |
| 340 | int ret; |
| 341 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 342 | |
| 343 | ret = clk_prepare_enable(sai->clk); |
| 344 | |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | static void fsl_sai_shutdown(struct snd_pcm_substream *substream, |
| 349 | struct snd_soc_dai *cpu_dai) |
| 350 | { |
| 351 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 352 | |
| 353 | clk_disable_unprepare(sai->clk); |
| 354 | } |
| 355 | |
| 356 | static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { |
| 357 | .set_sysclk = fsl_sai_set_dai_sysclk, |
| 358 | .set_fmt = fsl_sai_set_dai_fmt, |
| 359 | .hw_params = fsl_sai_hw_params, |
| 360 | .trigger = fsl_sai_trigger, |
| 361 | .startup = fsl_sai_startup, |
| 362 | .shutdown = fsl_sai_shutdown, |
| 363 | }; |
| 364 | |
| 365 | static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) |
| 366 | { |
| 367 | struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); |
| 368 | |
Xiubo Li | dd9f406 | 2013-12-20 12:35:33 +0800 | [diff] [blame] | 369 | snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, |
| 370 | &sai->dma_params_rx); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 371 | |
| 372 | snd_soc_dai_set_drvdata(cpu_dai, sai); |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 377 | static struct snd_soc_dai_driver fsl_sai_dai = { |
| 378 | .probe = fsl_sai_dai_probe, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 379 | .playback = { |
| 380 | .channels_min = 1, |
| 381 | .channels_max = 2, |
| 382 | .rates = SNDRV_PCM_RATE_8000_96000, |
| 383 | .formats = FSL_SAI_FORMATS, |
| 384 | }, |
| 385 | .capture = { |
| 386 | .channels_min = 1, |
| 387 | .channels_max = 2, |
| 388 | .rates = SNDRV_PCM_RATE_8000_96000, |
| 389 | .formats = FSL_SAI_FORMATS, |
| 390 | }, |
| 391 | .ops = &fsl_sai_pcm_dai_ops, |
| 392 | }; |
| 393 | |
| 394 | static const struct snd_soc_component_driver fsl_component = { |
| 395 | .name = "fsl-sai", |
| 396 | }; |
| 397 | |
| 398 | static int fsl_sai_probe(struct platform_device *pdev) |
| 399 | { |
| 400 | int ret; |
| 401 | struct fsl_sai *sai; |
| 402 | struct resource *res; |
| 403 | struct device_node *np = pdev->dev.of_node; |
| 404 | |
| 405 | sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); |
| 406 | if (!sai) |
| 407 | return -ENOMEM; |
| 408 | |
| 409 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 410 | sai->base = devm_ioremap_resource(&pdev->dev, res); |
| 411 | if (IS_ERR(sai->base)) |
| 412 | return PTR_ERR(sai->base); |
| 413 | |
| 414 | sai->clk = devm_clk_get(&pdev->dev, "sai"); |
| 415 | if (IS_ERR(sai->clk)) { |
| 416 | dev_err(&pdev->dev, "Cannot get SAI's clock\n"); |
| 417 | return PTR_ERR(sai->clk); |
| 418 | } |
| 419 | |
| 420 | sai->dma_params_rx.addr = res->start + FSL_SAI_RDR; |
| 421 | sai->dma_params_tx.addr = res->start + FSL_SAI_TDR; |
| 422 | sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX; |
| 423 | sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX; |
| 424 | |
| 425 | sai->big_endian_regs = of_property_read_bool(np, "big-endian-regs"); |
| 426 | sai->big_endian_data = of_property_read_bool(np, "big-endian-data"); |
| 427 | |
| 428 | platform_set_drvdata(pdev, sai); |
| 429 | |
| 430 | ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, |
| 431 | &fsl_sai_dai, 1); |
| 432 | if (ret) |
| 433 | return ret; |
| 434 | |
Xiubo Li | e5180df3 | 2013-12-20 12:30:26 +0800 | [diff] [blame] | 435 | return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 436 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | static const struct of_device_id fsl_sai_ids[] = { |
| 440 | { .compatible = "fsl,vf610-sai", }, |
| 441 | { /* sentinel */ } |
| 442 | }; |
| 443 | |
| 444 | static struct platform_driver fsl_sai_driver = { |
| 445 | .probe = fsl_sai_probe, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 446 | .driver = { |
| 447 | .name = "fsl-sai", |
| 448 | .owner = THIS_MODULE, |
| 449 | .of_match_table = fsl_sai_ids, |
| 450 | }, |
| 451 | }; |
| 452 | module_platform_driver(fsl_sai_driver); |
| 453 | |
| 454 | MODULE_DESCRIPTION("Freescale Soc SAI Interface"); |
| 455 | MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>"); |
| 456 | MODULE_ALIAS("platform:fsl-sai"); |
| 457 | MODULE_LICENSE("GPL"); |