| 1 | /* |
| 2 | * Freescale ALSA SoC Digital Audio Interface (SAI) driver. |
| 3 | * |
| 4 | * Copyright 2012-2015 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/regmap.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/time.h> |
| 21 | #include <sound/core.h> |
| 22 | #include <sound/dmaengine_pcm.h> |
| 23 | #include <sound/pcm_params.h> |
| 24 | #include <linux/mfd/syscon.h> |
| 25 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> |
| 26 | |
| 27 | #include "fsl_sai.h" |
| 28 | #include "imx-pcm.h" |
| 29 | |
| 30 | #define FSL_SAI_FLAGS (FSL_SAI_CSR_SEIE |\ |
| 31 | FSL_SAI_CSR_FEIE) |
| 32 | |
| 33 | static const unsigned int fsl_sai_rates[] = { |
| 34 | 8000, 11025, 12000, 16000, 22050, |
| 35 | 24000, 32000, 44100, 48000, 64000, |
| 36 | 88200, 96000, 176400, 192000 |
| 37 | }; |
| 38 | |
| 39 | static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = { |
| 40 | .count = ARRAY_SIZE(fsl_sai_rates), |
| 41 | .list = fsl_sai_rates, |
| 42 | }; |
| 43 | |
| 44 | static irqreturn_t fsl_sai_isr(int irq, void *devid) |
| 45 | { |
| 46 | struct fsl_sai *sai = (struct fsl_sai *)devid; |
| 47 | struct device *dev = &sai->pdev->dev; |
| 48 | u32 flags, xcsr, mask; |
| 49 | bool irq_none = true; |
| 50 | |
| 51 | /* |
| 52 | * Both IRQ status bits and IRQ mask bits are in the xCSR but |
| 53 | * different shifts. And we here create a mask only for those |
| 54 | * IRQs that we activated. |
| 55 | */ |
| 56 | mask = (FSL_SAI_FLAGS >> FSL_SAI_CSR_xIE_SHIFT) << FSL_SAI_CSR_xF_SHIFT; |
| 57 | |
| 58 | /* Tx IRQ */ |
| 59 | regmap_read(sai->regmap, FSL_SAI_TCSR, &xcsr); |
| 60 | flags = xcsr & mask; |
| 61 | |
| 62 | if (flags) |
| 63 | irq_none = false; |
| 64 | else |
| 65 | goto irq_rx; |
| 66 | |
| 67 | if (flags & FSL_SAI_CSR_WSF) |
| 68 | dev_dbg(dev, "isr: Start of Tx word detected\n"); |
| 69 | |
| 70 | if (flags & FSL_SAI_CSR_SEF) |
| 71 | dev_warn(dev, "isr: Tx Frame sync error detected\n"); |
| 72 | |
| 73 | if (flags & FSL_SAI_CSR_FEF) { |
| 74 | dev_warn(dev, "isr: Transmit underrun detected\n"); |
| 75 | /* FIFO reset for safety */ |
| 76 | xcsr |= FSL_SAI_CSR_FR; |
| 77 | } |
| 78 | |
| 79 | if (flags & FSL_SAI_CSR_FWF) |
| 80 | dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n"); |
| 81 | |
| 82 | if (flags & FSL_SAI_CSR_FRF) |
| 83 | dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n"); |
| 84 | |
| 85 | flags &= FSL_SAI_CSR_xF_W_MASK; |
| 86 | xcsr &= ~FSL_SAI_CSR_xF_MASK; |
| 87 | |
| 88 | if (flags) |
| 89 | regmap_write(sai->regmap, FSL_SAI_TCSR, flags | xcsr); |
| 90 | |
| 91 | irq_rx: |
| 92 | /* Rx IRQ */ |
| 93 | regmap_read(sai->regmap, FSL_SAI_RCSR, &xcsr); |
| 94 | flags = xcsr & mask; |
| 95 | |
| 96 | if (flags) |
| 97 | irq_none = false; |
| 98 | else |
| 99 | goto out; |
| 100 | |
| 101 | if (flags & FSL_SAI_CSR_WSF) |
| 102 | dev_dbg(dev, "isr: Start of Rx word detected\n"); |
| 103 | |
| 104 | if (flags & FSL_SAI_CSR_SEF) |
| 105 | dev_warn(dev, "isr: Rx Frame sync error detected\n"); |
| 106 | |
| 107 | if (flags & FSL_SAI_CSR_FEF) { |
| 108 | dev_warn(dev, "isr: Receive overflow detected\n"); |
| 109 | /* FIFO reset for safety */ |
| 110 | xcsr |= FSL_SAI_CSR_FR; |
| 111 | } |
| 112 | |
| 113 | if (flags & FSL_SAI_CSR_FWF) |
| 114 | dev_dbg(dev, "isr: Enabled receive FIFO is full\n"); |
| 115 | |
| 116 | if (flags & FSL_SAI_CSR_FRF) |
| 117 | dev_dbg(dev, "isr: Receive FIFO watermark has been reached\n"); |
| 118 | |
| 119 | flags &= FSL_SAI_CSR_xF_W_MASK; |
| 120 | xcsr &= ~FSL_SAI_CSR_xF_MASK; |
| 121 | |
| 122 | if (flags) |
| 123 | regmap_write(sai->regmap, FSL_SAI_RCSR, flags | xcsr); |
| 124 | |
| 125 | out: |
| 126 | if (irq_none) |
| 127 | return IRQ_NONE; |
| 128 | else |
| 129 | return IRQ_HANDLED; |
| 130 | } |
| 131 | |
| 132 | static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, |
| 133 | u32 rx_mask, int slots, int slot_width) |
| 134 | { |
| 135 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 136 | |
| 137 | sai->slots = slots; |
| 138 | sai->slot_width = slot_width; |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, |
| 144 | int clk_id, unsigned int freq, int fsl_dir) |
| 145 | { |
| 146 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 147 | bool tx = fsl_dir == FSL_FMT_TRANSMITTER; |
| 148 | u32 val_cr2 = 0; |
| 149 | |
| 150 | switch (clk_id) { |
| 151 | case FSL_SAI_CLK_BUS: |
| 152 | val_cr2 |= FSL_SAI_CR2_MSEL_BUS; |
| 153 | break; |
| 154 | case FSL_SAI_CLK_MAST1: |
| 155 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1; |
| 156 | break; |
| 157 | case FSL_SAI_CLK_MAST2: |
| 158 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2; |
| 159 | break; |
| 160 | case FSL_SAI_CLK_MAST3: |
| 161 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3; |
| 162 | break; |
| 163 | default: |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx), |
| 168 | FSL_SAI_CR2_MSEL_MASK, val_cr2); |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, |
| 174 | int clk_id, unsigned int freq, int dir) |
| 175 | { |
| 176 | int ret; |
| 177 | |
| 178 | if (dir == SND_SOC_CLOCK_IN) |
| 179 | return 0; |
| 180 | |
| 181 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 182 | FSL_FMT_TRANSMITTER); |
| 183 | if (ret) { |
| 184 | dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret); |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 189 | FSL_FMT_RECEIVER); |
| 190 | if (ret) |
| 191 | dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret); |
| 192 | |
| 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, |
| 197 | unsigned int fmt, int fsl_dir) |
| 198 | { |
| 199 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 200 | bool tx = fsl_dir == FSL_FMT_TRANSMITTER; |
| 201 | u32 val_cr2 = 0, val_cr4 = 0; |
| 202 | |
| 203 | if (!sai->is_lsb_first) |
| 204 | val_cr4 |= FSL_SAI_CR4_MF; |
| 205 | |
| 206 | /* DAI mode */ |
| 207 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 208 | case SND_SOC_DAIFMT_I2S: |
| 209 | /* |
| 210 | * Frame low, 1clk before data, one word length for frame sync, |
| 211 | * frame sync starts one serial clock cycle earlier, |
| 212 | * that is, together with the last bit of the previous |
| 213 | * data word. |
| 214 | */ |
| 215 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 216 | val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP; |
| 217 | break; |
| 218 | case SND_SOC_DAIFMT_LEFT_J: |
| 219 | /* |
| 220 | * Frame high, one word length for frame sync, |
| 221 | * frame sync asserts with the first bit of the frame. |
| 222 | */ |
| 223 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 224 | break; |
| 225 | case SND_SOC_DAIFMT_DSP_A: |
| 226 | /* |
| 227 | * Frame high, 1clk before data, one bit for frame sync, |
| 228 | * frame sync starts one serial clock cycle earlier, |
| 229 | * that is, together with the last bit of the previous |
| 230 | * data word. |
| 231 | */ |
| 232 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 233 | val_cr4 |= FSL_SAI_CR4_FSE; |
| 234 | sai->is_dsp_mode = true; |
| 235 | break; |
| 236 | case SND_SOC_DAIFMT_DSP_B: |
| 237 | /* |
| 238 | * Frame high, one bit for frame sync, |
| 239 | * frame sync asserts with the first bit of the frame. |
| 240 | */ |
| 241 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 242 | sai->is_dsp_mode = true; |
| 243 | break; |
| 244 | case SND_SOC_DAIFMT_RIGHT_J: |
| 245 | /* To be done */ |
| 246 | default: |
| 247 | return -EINVAL; |
| 248 | } |
| 249 | |
| 250 | /* DAI clock inversion */ |
| 251 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 252 | case SND_SOC_DAIFMT_IB_IF: |
| 253 | /* Invert both clocks */ |
| 254 | val_cr2 ^= FSL_SAI_CR2_BCP; |
| 255 | val_cr4 ^= FSL_SAI_CR4_FSP; |
| 256 | break; |
| 257 | case SND_SOC_DAIFMT_IB_NF: |
| 258 | /* Invert bit clock */ |
| 259 | val_cr2 ^= FSL_SAI_CR2_BCP; |
| 260 | break; |
| 261 | case SND_SOC_DAIFMT_NB_IF: |
| 262 | /* Invert frame clock */ |
| 263 | val_cr4 ^= FSL_SAI_CR4_FSP; |
| 264 | break; |
| 265 | case SND_SOC_DAIFMT_NB_NF: |
| 266 | /* Nothing to do for both normal cases */ |
| 267 | break; |
| 268 | default: |
| 269 | return -EINVAL; |
| 270 | } |
| 271 | |
| 272 | /* DAI clock master masks */ |
| 273 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 274 | case SND_SOC_DAIFMT_CBS_CFS: |
| 275 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; |
| 276 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; |
| 277 | break; |
| 278 | case SND_SOC_DAIFMT_CBM_CFM: |
| 279 | sai->is_slave_mode = true; |
| 280 | break; |
| 281 | case SND_SOC_DAIFMT_CBS_CFM: |
| 282 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; |
| 283 | break; |
| 284 | case SND_SOC_DAIFMT_CBM_CFS: |
| 285 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; |
| 286 | sai->is_slave_mode = true; |
| 287 | break; |
| 288 | default: |
| 289 | return -EINVAL; |
| 290 | } |
| 291 | |
| 292 | regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx), |
| 293 | FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2); |
| 294 | regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx), |
| 295 | FSL_SAI_CR4_MF | FSL_SAI_CR4_FSE | |
| 296 | FSL_SAI_CR4_FSP | FSL_SAI_CR4_FSD_MSTR, val_cr4); |
| 297 | |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) |
| 302 | { |
| 303 | int ret; |
| 304 | |
| 305 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER); |
| 306 | if (ret) { |
| 307 | dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret); |
| 308 | return ret; |
| 309 | } |
| 310 | |
| 311 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER); |
| 312 | if (ret) |
| 313 | dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret); |
| 314 | |
| 315 | return ret; |
| 316 | } |
| 317 | |
| 318 | static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) |
| 319 | { |
| 320 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai); |
| 321 | unsigned long clk_rate; |
| 322 | u32 savediv = 0, ratio, savesub = freq; |
| 323 | u32 id; |
| 324 | int ret = 0; |
| 325 | |
| 326 | /* Don't apply to slave mode */ |
| 327 | if (sai->is_slave_mode) |
| 328 | return 0; |
| 329 | |
| 330 | for (id = 0; id < FSL_SAI_MCLK_MAX; id++) { |
| 331 | clk_rate = clk_get_rate(sai->mclk_clk[id]); |
| 332 | if (!clk_rate) |
| 333 | continue; |
| 334 | |
| 335 | ratio = clk_rate / freq; |
| 336 | |
| 337 | ret = clk_rate - ratio * freq; |
| 338 | |
| 339 | /* |
| 340 | * Drop the source that can not be |
| 341 | * divided into the required rate. |
| 342 | */ |
| 343 | if (ret != 0 && clk_rate / ret < 1000) |
| 344 | continue; |
| 345 | |
| 346 | dev_dbg(dai->dev, |
| 347 | "ratio %d for freq %dHz based on clock %ldHz\n", |
| 348 | ratio, freq, clk_rate); |
| 349 | |
| 350 | if (ratio % 2 == 0 && ratio >= 2 && ratio <= 512) |
| 351 | ratio /= 2; |
| 352 | else |
| 353 | continue; |
| 354 | |
| 355 | if (ret < savesub) { |
| 356 | savediv = ratio; |
| 357 | sai->mclk_id[tx] = id; |
| 358 | savesub = ret; |
| 359 | } |
| 360 | |
| 361 | if (ret == 0) |
| 362 | break; |
| 363 | } |
| 364 | |
| 365 | if (savediv == 0) { |
| 366 | dev_err(dai->dev, "failed to derive required %cx rate: %d\n", |
| 367 | tx ? 'T' : 'R', freq); |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * 1) For Asynchronous mode, we must set RCR2 register for capture, and |
| 373 | * set TCR2 register for playback. |
| 374 | * 2) For Tx sync with Rx clock, we must set RCR2 register for playback |
| 375 | * and capture. |
| 376 | * 3) For Rx sync with Tx clock, we must set TCR2 register for playback |
| 377 | * and capture. |
| 378 | * 4) For Tx and Rx are both Synchronous with another SAI, we just |
| 379 | * ignore it. |
| 380 | */ |
| 381 | if ((sai->synchronous[TX] && !sai->synchronous[RX]) || |
| 382 | (!tx && !sai->synchronous[RX])) { |
| 383 | regmap_update_bits(sai->regmap, FSL_SAI_RCR2, |
| 384 | FSL_SAI_CR2_MSEL_MASK, |
| 385 | FSL_SAI_CR2_MSEL(sai->mclk_id[tx])); |
| 386 | regmap_update_bits(sai->regmap, FSL_SAI_RCR2, |
| 387 | FSL_SAI_CR2_DIV_MASK, savediv - 1); |
| 388 | } else if ((sai->synchronous[RX] && !sai->synchronous[TX]) || |
| 389 | (tx && !sai->synchronous[TX])) { |
| 390 | regmap_update_bits(sai->regmap, FSL_SAI_TCR2, |
| 391 | FSL_SAI_CR2_MSEL_MASK, |
| 392 | FSL_SAI_CR2_MSEL(sai->mclk_id[tx])); |
| 393 | regmap_update_bits(sai->regmap, FSL_SAI_TCR2, |
| 394 | FSL_SAI_CR2_DIV_MASK, savediv - 1); |
| 395 | } |
| 396 | |
| 397 | dev_dbg(dai->dev, "best fit: clock id=%d, div=%d, deviation =%d\n", |
| 398 | sai->mclk_id[tx], savediv, savesub); |
| 399 | |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | static int fsl_sai_hw_params(struct snd_pcm_substream *substream, |
| 404 | struct snd_pcm_hw_params *params, |
| 405 | struct snd_soc_dai *cpu_dai) |
| 406 | { |
| 407 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 408 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 409 | unsigned int channels = params_channels(params); |
| 410 | u32 word_width = params_width(params); |
| 411 | u32 val_cr4 = 0, val_cr5 = 0; |
| 412 | u32 slots = (channels == 1) ? 2 : channels; |
| 413 | u32 slot_width = word_width; |
| 414 | int ret; |
| 415 | |
| 416 | if (sai->slots) |
| 417 | slots = sai->slots; |
| 418 | |
| 419 | if (sai->slot_width) |
| 420 | slot_width = sai->slot_width; |
| 421 | |
| 422 | if (!sai->is_slave_mode) { |
| 423 | ret = fsl_sai_set_bclk(cpu_dai, tx, |
| 424 | slots * slot_width * params_rate(params)); |
| 425 | if (ret) |
| 426 | return ret; |
| 427 | |
| 428 | /* Do not enable the clock if it is already enabled */ |
| 429 | if (!(sai->mclk_streams & BIT(substream->stream))) { |
| 430 | ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[tx]]); |
| 431 | if (ret) |
| 432 | return ret; |
| 433 | |
| 434 | sai->mclk_streams |= BIT(substream->stream); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | if (!sai->is_dsp_mode) |
| 439 | val_cr4 |= FSL_SAI_CR4_SYWD(slot_width); |
| 440 | |
| 441 | val_cr5 |= FSL_SAI_CR5_WNW(slot_width); |
| 442 | val_cr5 |= FSL_SAI_CR5_W0W(slot_width); |
| 443 | |
| 444 | if (sai->is_lsb_first) |
| 445 | val_cr5 |= FSL_SAI_CR5_FBT(0); |
| 446 | else |
| 447 | val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1); |
| 448 | |
| 449 | val_cr4 |= FSL_SAI_CR4_FRSZ(slots); |
| 450 | |
| 451 | /* |
| 452 | * For SAI master mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will |
| 453 | * generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4), |
| 454 | * RCR5(TCR5) and RMR(TMR) for playback(capture), or there will be sync |
| 455 | * error. |
| 456 | */ |
| 457 | |
| 458 | if (!sai->is_slave_mode) { |
| 459 | if (!sai->synchronous[TX] && sai->synchronous[RX] && !tx) { |
| 460 | regmap_update_bits(sai->regmap, FSL_SAI_TCR4, |
| 461 | FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, |
| 462 | val_cr4); |
| 463 | regmap_update_bits(sai->regmap, FSL_SAI_TCR5, |
| 464 | FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | |
| 465 | FSL_SAI_CR5_FBT_MASK, val_cr5); |
| 466 | regmap_write(sai->regmap, FSL_SAI_TMR, |
| 467 | ~0UL - ((1 << channels) - 1)); |
| 468 | } else if (!sai->synchronous[RX] && sai->synchronous[TX] && tx) { |
| 469 | regmap_update_bits(sai->regmap, FSL_SAI_RCR4, |
| 470 | FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, |
| 471 | val_cr4); |
| 472 | regmap_update_bits(sai->regmap, FSL_SAI_RCR5, |
| 473 | FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | |
| 474 | FSL_SAI_CR5_FBT_MASK, val_cr5); |
| 475 | regmap_write(sai->regmap, FSL_SAI_RMR, |
| 476 | ~0UL - ((1 << channels) - 1)); |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx), |
| 481 | FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, |
| 482 | val_cr4); |
| 483 | regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx), |
| 484 | FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | |
| 485 | FSL_SAI_CR5_FBT_MASK, val_cr5); |
| 486 | regmap_write(sai->regmap, FSL_SAI_xMR(tx), ~0UL - ((1 << channels) - 1)); |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int fsl_sai_hw_free(struct snd_pcm_substream *substream, |
| 492 | struct snd_soc_dai *cpu_dai) |
| 493 | { |
| 494 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 495 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 496 | |
| 497 | if (!sai->is_slave_mode && |
| 498 | sai->mclk_streams & BIT(substream->stream)) { |
| 499 | clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[tx]]); |
| 500 | sai->mclk_streams &= ~BIT(substream->stream); |
| 501 | } |
| 502 | |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | |
| 507 | static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, |
| 508 | struct snd_soc_dai *cpu_dai) |
| 509 | { |
| 510 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 511 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 512 | u32 xcsr, count = 100; |
| 513 | |
| 514 | /* |
| 515 | * Asynchronous mode: Clear SYNC for both Tx and Rx. |
| 516 | * Rx sync with Tx clocks: Clear SYNC for Tx, set it for Rx. |
| 517 | * Tx sync with Rx clocks: Clear SYNC for Rx, set it for Tx. |
| 518 | */ |
| 519 | regmap_update_bits(sai->regmap, FSL_SAI_TCR2, FSL_SAI_CR2_SYNC, |
| 520 | sai->synchronous[TX] ? FSL_SAI_CR2_SYNC : 0); |
| 521 | regmap_update_bits(sai->regmap, FSL_SAI_RCR2, FSL_SAI_CR2_SYNC, |
| 522 | sai->synchronous[RX] ? FSL_SAI_CR2_SYNC : 0); |
| 523 | |
| 524 | /* |
| 525 | * It is recommended that the transmitter is the last enabled |
| 526 | * and the first disabled. |
| 527 | */ |
| 528 | switch (cmd) { |
| 529 | case SNDRV_PCM_TRIGGER_START: |
| 530 | case SNDRV_PCM_TRIGGER_RESUME: |
| 531 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 532 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
| 533 | FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE); |
| 534 | |
| 535 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, |
| 536 | FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); |
| 537 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, |
| 538 | FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); |
| 539 | |
| 540 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
| 541 | FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS); |
| 542 | break; |
| 543 | case SNDRV_PCM_TRIGGER_STOP: |
| 544 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 545 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 546 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
| 547 | FSL_SAI_CSR_FRDE, 0); |
| 548 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
| 549 | FSL_SAI_CSR_xIE_MASK, 0); |
| 550 | |
| 551 | /* Check if the opposite FRDE is also disabled */ |
| 552 | regmap_read(sai->regmap, FSL_SAI_xCSR(!tx), &xcsr); |
| 553 | if (!(xcsr & FSL_SAI_CSR_FRDE)) { |
| 554 | /* Disable both directions and reset their FIFOs */ |
| 555 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, |
| 556 | FSL_SAI_CSR_TERE, 0); |
| 557 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, |
| 558 | FSL_SAI_CSR_TERE, 0); |
| 559 | |
| 560 | /* TERE will remain set till the end of current frame */ |
| 561 | do { |
| 562 | udelay(10); |
| 563 | regmap_read(sai->regmap, FSL_SAI_xCSR(tx), &xcsr); |
| 564 | } while (--count && xcsr & FSL_SAI_CSR_TERE); |
| 565 | |
| 566 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, |
| 567 | FSL_SAI_CSR_FR, FSL_SAI_CSR_FR); |
| 568 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, |
| 569 | FSL_SAI_CSR_FR, FSL_SAI_CSR_FR); |
| 570 | |
| 571 | /* |
| 572 | * For sai master mode, after several open/close sai, |
| 573 | * there will be no frame clock, and can't recover |
| 574 | * anymore. Add software reset to fix this issue. |
| 575 | * This is a hardware bug, and will be fix in the |
| 576 | * next sai version. |
| 577 | */ |
| 578 | if (!sai->is_slave_mode) { |
| 579 | /* Software Reset for both Tx and Rx */ |
| 580 | regmap_write(sai->regmap, |
| 581 | FSL_SAI_TCSR, FSL_SAI_CSR_SR); |
| 582 | regmap_write(sai->regmap, |
| 583 | FSL_SAI_RCSR, FSL_SAI_CSR_SR); |
| 584 | /* Clear SR bit to finish the reset */ |
| 585 | regmap_write(sai->regmap, FSL_SAI_TCSR, 0); |
| 586 | regmap_write(sai->regmap, FSL_SAI_RCSR, 0); |
| 587 | } |
| 588 | } |
| 589 | break; |
| 590 | default: |
| 591 | return -EINVAL; |
| 592 | } |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | static int fsl_sai_startup(struct snd_pcm_substream *substream, |
| 598 | struct snd_soc_dai *cpu_dai) |
| 599 | { |
| 600 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 601 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 602 | struct device *dev = &sai->pdev->dev; |
| 603 | int ret; |
| 604 | |
| 605 | ret = clk_prepare_enable(sai->bus_clk); |
| 606 | if (ret) { |
| 607 | dev_err(dev, "failed to enable bus clock: %d\n", ret); |
| 608 | return ret; |
| 609 | } |
| 610 | |
| 611 | regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, |
| 612 | FSL_SAI_CR3_TRCE); |
| 613 | |
| 614 | ret = snd_pcm_hw_constraint_list(substream->runtime, 0, |
| 615 | SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints); |
| 616 | |
| 617 | return ret; |
| 618 | } |
| 619 | |
| 620 | static void fsl_sai_shutdown(struct snd_pcm_substream *substream, |
| 621 | struct snd_soc_dai *cpu_dai) |
| 622 | { |
| 623 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 624 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 625 | |
| 626 | regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, 0); |
| 627 | |
| 628 | clk_disable_unprepare(sai->bus_clk); |
| 629 | } |
| 630 | |
| 631 | static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { |
| 632 | .set_sysclk = fsl_sai_set_dai_sysclk, |
| 633 | .set_fmt = fsl_sai_set_dai_fmt, |
| 634 | .set_tdm_slot = fsl_sai_set_dai_tdm_slot, |
| 635 | .hw_params = fsl_sai_hw_params, |
| 636 | .hw_free = fsl_sai_hw_free, |
| 637 | .trigger = fsl_sai_trigger, |
| 638 | .startup = fsl_sai_startup, |
| 639 | .shutdown = fsl_sai_shutdown, |
| 640 | }; |
| 641 | |
| 642 | static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) |
| 643 | { |
| 644 | struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); |
| 645 | |
| 646 | /* Software Reset for both Tx and Rx */ |
| 647 | regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR); |
| 648 | regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR); |
| 649 | /* Clear SR bit to finish the reset */ |
| 650 | regmap_write(sai->regmap, FSL_SAI_TCSR, 0); |
| 651 | regmap_write(sai->regmap, FSL_SAI_RCSR, 0); |
| 652 | |
| 653 | regmap_update_bits(sai->regmap, FSL_SAI_TCR1, FSL_SAI_CR1_RFW_MASK, |
| 654 | FSL_SAI_MAXBURST_TX * 2); |
| 655 | regmap_update_bits(sai->regmap, FSL_SAI_RCR1, FSL_SAI_CR1_RFW_MASK, |
| 656 | FSL_SAI_MAXBURST_RX - 1); |
| 657 | |
| 658 | snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, |
| 659 | &sai->dma_params_rx); |
| 660 | |
| 661 | snd_soc_dai_set_drvdata(cpu_dai, sai); |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
| 666 | static struct snd_soc_dai_driver fsl_sai_dai = { |
| 667 | .probe = fsl_sai_dai_probe, |
| 668 | .playback = { |
| 669 | .stream_name = "CPU-Playback", |
| 670 | .channels_min = 1, |
| 671 | .channels_max = 2, |
| 672 | .rate_min = 8000, |
| 673 | .rate_max = 192000, |
| 674 | .rates = SNDRV_PCM_RATE_KNOT, |
| 675 | .formats = FSL_SAI_FORMATS, |
| 676 | }, |
| 677 | .capture = { |
| 678 | .stream_name = "CPU-Capture", |
| 679 | .channels_min = 1, |
| 680 | .channels_max = 2, |
| 681 | .rate_min = 8000, |
| 682 | .rate_max = 192000, |
| 683 | .rates = SNDRV_PCM_RATE_KNOT, |
| 684 | .formats = FSL_SAI_FORMATS, |
| 685 | }, |
| 686 | .ops = &fsl_sai_pcm_dai_ops, |
| 687 | }; |
| 688 | |
| 689 | static const struct snd_soc_component_driver fsl_component = { |
| 690 | .name = "fsl-sai", |
| 691 | }; |
| 692 | |
| 693 | static struct reg_default fsl_sai_reg_defaults[] = { |
| 694 | {FSL_SAI_TCR1, 0}, |
| 695 | {FSL_SAI_TCR2, 0}, |
| 696 | {FSL_SAI_TCR3, 0}, |
| 697 | {FSL_SAI_TCR4, 0}, |
| 698 | {FSL_SAI_TCR5, 0}, |
| 699 | {FSL_SAI_TDR, 0}, |
| 700 | {FSL_SAI_TMR, 0}, |
| 701 | {FSL_SAI_RCR1, 0}, |
| 702 | {FSL_SAI_RCR2, 0}, |
| 703 | {FSL_SAI_RCR3, 0}, |
| 704 | {FSL_SAI_RCR4, 0}, |
| 705 | {FSL_SAI_RCR5, 0}, |
| 706 | {FSL_SAI_RMR, 0}, |
| 707 | }; |
| 708 | |
| 709 | static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) |
| 710 | { |
| 711 | switch (reg) { |
| 712 | case FSL_SAI_TCSR: |
| 713 | case FSL_SAI_TCR1: |
| 714 | case FSL_SAI_TCR2: |
| 715 | case FSL_SAI_TCR3: |
| 716 | case FSL_SAI_TCR4: |
| 717 | case FSL_SAI_TCR5: |
| 718 | case FSL_SAI_TFR: |
| 719 | case FSL_SAI_TMR: |
| 720 | case FSL_SAI_RCSR: |
| 721 | case FSL_SAI_RCR1: |
| 722 | case FSL_SAI_RCR2: |
| 723 | case FSL_SAI_RCR3: |
| 724 | case FSL_SAI_RCR4: |
| 725 | case FSL_SAI_RCR5: |
| 726 | case FSL_SAI_RDR: |
| 727 | case FSL_SAI_RFR: |
| 728 | case FSL_SAI_RMR: |
| 729 | return true; |
| 730 | default: |
| 731 | return false; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) |
| 736 | { |
| 737 | switch (reg) { |
| 738 | case FSL_SAI_TCSR: |
| 739 | case FSL_SAI_RCSR: |
| 740 | case FSL_SAI_TFR: |
| 741 | case FSL_SAI_RFR: |
| 742 | case FSL_SAI_RDR: |
| 743 | return true; |
| 744 | default: |
| 745 | return false; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg) |
| 750 | { |
| 751 | switch (reg) { |
| 752 | case FSL_SAI_TCSR: |
| 753 | case FSL_SAI_TCR1: |
| 754 | case FSL_SAI_TCR2: |
| 755 | case FSL_SAI_TCR3: |
| 756 | case FSL_SAI_TCR4: |
| 757 | case FSL_SAI_TCR5: |
| 758 | case FSL_SAI_TDR: |
| 759 | case FSL_SAI_TMR: |
| 760 | case FSL_SAI_RCSR: |
| 761 | case FSL_SAI_RCR1: |
| 762 | case FSL_SAI_RCR2: |
| 763 | case FSL_SAI_RCR3: |
| 764 | case FSL_SAI_RCR4: |
| 765 | case FSL_SAI_RCR5: |
| 766 | case FSL_SAI_RMR: |
| 767 | return true; |
| 768 | default: |
| 769 | return false; |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | static const struct regmap_config fsl_sai_regmap_config = { |
| 774 | .reg_bits = 32, |
| 775 | .reg_stride = 4, |
| 776 | .val_bits = 32, |
| 777 | |
| 778 | .max_register = FSL_SAI_RMR, |
| 779 | .reg_defaults = fsl_sai_reg_defaults, |
| 780 | .num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults), |
| 781 | .readable_reg = fsl_sai_readable_reg, |
| 782 | .volatile_reg = fsl_sai_volatile_reg, |
| 783 | .writeable_reg = fsl_sai_writeable_reg, |
| 784 | .cache_type = REGCACHE_FLAT, |
| 785 | }; |
| 786 | |
| 787 | static int fsl_sai_probe(struct platform_device *pdev) |
| 788 | { |
| 789 | struct device_node *np = pdev->dev.of_node; |
| 790 | struct fsl_sai *sai; |
| 791 | struct regmap *gpr; |
| 792 | struct resource *res; |
| 793 | void __iomem *base; |
| 794 | char tmp[8]; |
| 795 | int irq, ret, i; |
| 796 | int index; |
| 797 | |
| 798 | sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); |
| 799 | if (!sai) |
| 800 | return -ENOMEM; |
| 801 | |
| 802 | sai->pdev = pdev; |
| 803 | |
| 804 | if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx6sx-sai") || |
| 805 | of_device_is_compatible(pdev->dev.of_node, "fsl,imx6ul-sai")) |
| 806 | sai->sai_on_imx = true; |
| 807 | |
| 808 | sai->is_lsb_first = of_property_read_bool(np, "lsb-first"); |
| 809 | |
| 810 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 811 | base = devm_ioremap_resource(&pdev->dev, res); |
| 812 | if (IS_ERR(base)) |
| 813 | return PTR_ERR(base); |
| 814 | |
| 815 | sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, |
| 816 | "bus", base, &fsl_sai_regmap_config); |
| 817 | |
| 818 | /* Compatible with old DTB cases */ |
| 819 | if (IS_ERR(sai->regmap)) |
| 820 | sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, |
| 821 | "sai", base, &fsl_sai_regmap_config); |
| 822 | if (IS_ERR(sai->regmap)) { |
| 823 | dev_err(&pdev->dev, "regmap init failed\n"); |
| 824 | return PTR_ERR(sai->regmap); |
| 825 | } |
| 826 | |
| 827 | /* No error out for old DTB cases but only mark the clock NULL */ |
| 828 | sai->bus_clk = devm_clk_get(&pdev->dev, "bus"); |
| 829 | if (IS_ERR(sai->bus_clk)) { |
| 830 | dev_err(&pdev->dev, "failed to get bus clock: %ld\n", |
| 831 | PTR_ERR(sai->bus_clk)); |
| 832 | sai->bus_clk = NULL; |
| 833 | } |
| 834 | |
| 835 | sai->mclk_clk[0] = sai->bus_clk; |
| 836 | for (i = 1; i < FSL_SAI_MCLK_MAX; i++) { |
| 837 | sprintf(tmp, "mclk%d", i); |
| 838 | sai->mclk_clk[i] = devm_clk_get(&pdev->dev, tmp); |
| 839 | if (IS_ERR(sai->mclk_clk[i])) { |
| 840 | dev_err(&pdev->dev, "failed to get mclk%d clock: %ld\n", |
| 841 | i + 1, PTR_ERR(sai->mclk_clk[i])); |
| 842 | sai->mclk_clk[i] = NULL; |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | irq = platform_get_irq(pdev, 0); |
| 847 | if (irq < 0) { |
| 848 | dev_err(&pdev->dev, "no irq for node %s\n", pdev->name); |
| 849 | return irq; |
| 850 | } |
| 851 | |
| 852 | ret = devm_request_irq(&pdev->dev, irq, fsl_sai_isr, 0, np->name, sai); |
| 853 | if (ret) { |
| 854 | dev_err(&pdev->dev, "failed to claim irq %u\n", irq); |
| 855 | return ret; |
| 856 | } |
| 857 | |
| 858 | /* Sync Tx with Rx as default by following old DT binding */ |
| 859 | sai->synchronous[RX] = true; |
| 860 | sai->synchronous[TX] = false; |
| 861 | fsl_sai_dai.symmetric_rates = 1; |
| 862 | fsl_sai_dai.symmetric_channels = 1; |
| 863 | fsl_sai_dai.symmetric_samplebits = 1; |
| 864 | |
| 865 | if (of_find_property(np, "fsl,sai-synchronous-rx", NULL) && |
| 866 | of_find_property(np, "fsl,sai-asynchronous", NULL)) { |
| 867 | /* error out if both synchronous and asynchronous are present */ |
| 868 | dev_err(&pdev->dev, "invalid binding for synchronous mode\n"); |
| 869 | return -EINVAL; |
| 870 | } |
| 871 | |
| 872 | if (of_find_property(np, "fsl,sai-synchronous-rx", NULL)) { |
| 873 | /* Sync Rx with Tx */ |
| 874 | sai->synchronous[RX] = false; |
| 875 | sai->synchronous[TX] = true; |
| 876 | } else if (of_find_property(np, "fsl,sai-asynchronous", NULL)) { |
| 877 | /* Discard all settings for asynchronous mode */ |
| 878 | sai->synchronous[RX] = false; |
| 879 | sai->synchronous[TX] = false; |
| 880 | fsl_sai_dai.symmetric_rates = 0; |
| 881 | fsl_sai_dai.symmetric_channels = 0; |
| 882 | fsl_sai_dai.symmetric_samplebits = 0; |
| 883 | } |
| 884 | |
| 885 | if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) && |
| 886 | of_device_is_compatible(pdev->dev.of_node, "fsl,imx6ul-sai")) { |
| 887 | gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr"); |
| 888 | if (IS_ERR(gpr)) { |
| 889 | dev_err(&pdev->dev, "cannot find iomuxc registers\n"); |
| 890 | return PTR_ERR(gpr); |
| 891 | } |
| 892 | |
| 893 | index = of_alias_get_id(np, "sai"); |
| 894 | if (index < 0) |
| 895 | return index; |
| 896 | |
| 897 | regmap_update_bits(gpr, IOMUXC_GPR1, MCLK_DIR(index), |
| 898 | MCLK_DIR(index)); |
| 899 | } |
| 900 | |
| 901 | sai->dma_params_rx.addr = res->start + FSL_SAI_RDR; |
| 902 | sai->dma_params_tx.addr = res->start + FSL_SAI_TDR; |
| 903 | sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX; |
| 904 | sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX; |
| 905 | |
| 906 | platform_set_drvdata(pdev, sai); |
| 907 | |
| 908 | ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, |
| 909 | &fsl_sai_dai, 1); |
| 910 | if (ret) |
| 911 | return ret; |
| 912 | |
| 913 | if (sai->sai_on_imx) |
| 914 | return imx_pcm_dma_init(pdev, IMX_SAI_DMABUF_SIZE); |
| 915 | else |
| 916 | return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); |
| 917 | } |
| 918 | |
| 919 | static const struct of_device_id fsl_sai_ids[] = { |
| 920 | { .compatible = "fsl,vf610-sai", }, |
| 921 | { .compatible = "fsl,imx6sx-sai", }, |
| 922 | { .compatible = "fsl,imx6ul-sai", }, |
| 923 | { /* sentinel */ } |
| 924 | }; |
| 925 | MODULE_DEVICE_TABLE(of, fsl_sai_ids); |
| 926 | |
| 927 | #ifdef CONFIG_PM_SLEEP |
| 928 | static int fsl_sai_suspend(struct device *dev) |
| 929 | { |
| 930 | struct fsl_sai *sai = dev_get_drvdata(dev); |
| 931 | |
| 932 | regcache_cache_only(sai->regmap, true); |
| 933 | regcache_mark_dirty(sai->regmap); |
| 934 | |
| 935 | return 0; |
| 936 | } |
| 937 | |
| 938 | static int fsl_sai_resume(struct device *dev) |
| 939 | { |
| 940 | struct fsl_sai *sai = dev_get_drvdata(dev); |
| 941 | |
| 942 | regcache_cache_only(sai->regmap, false); |
| 943 | regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR); |
| 944 | regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR); |
| 945 | usleep_range(1000, 2000); |
| 946 | regmap_write(sai->regmap, FSL_SAI_TCSR, 0); |
| 947 | regmap_write(sai->regmap, FSL_SAI_RCSR, 0); |
| 948 | return regcache_sync(sai->regmap); |
| 949 | } |
| 950 | #endif /* CONFIG_PM_SLEEP */ |
| 951 | |
| 952 | static const struct dev_pm_ops fsl_sai_pm_ops = { |
| 953 | SET_SYSTEM_SLEEP_PM_OPS(fsl_sai_suspend, fsl_sai_resume) |
| 954 | }; |
| 955 | |
| 956 | static struct platform_driver fsl_sai_driver = { |
| 957 | .probe = fsl_sai_probe, |
| 958 | .driver = { |
| 959 | .name = "fsl-sai", |
| 960 | .pm = &fsl_sai_pm_ops, |
| 961 | .of_match_table = fsl_sai_ids, |
| 962 | }, |
| 963 | }; |
| 964 | module_platform_driver(fsl_sai_driver); |
| 965 | |
| 966 | MODULE_DESCRIPTION("Freescale Soc SAI Interface"); |
| 967 | MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>"); |
| 968 | MODULE_ALIAS("platform:fsl-sai"); |
| 969 | MODULE_LICENSE("GPL"); |