1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/sound/soc/m8m/hi6210_i2s.c - I2S IP driver 4 * 5 * Copyright (C) 2015 Linaro, Ltd 6 * Author: Andy Green <andy.green@linaro.org> 7 * 8 * This driver only deals with S2 interface (BT) 9 */ 10 11 #include <linux/init.h> 12 #include <linux/module.h> 13 #include <linux/device.h> 14 #include <linux/delay.h> 15 #include <linux/clk.h> 16 #include <linux/jiffies.h> 17 #include <linux/io.h> 18 #include <linux/gpio.h> 19 #include <sound/core.h> 20 #include <sound/pcm.h> 21 #include <sound/pcm_params.h> 22 #include <sound/dmaengine_pcm.h> 23 #include <sound/initval.h> 24 #include <sound/soc.h> 25 #include <linux/interrupt.h> 26 #include <linux/reset.h> 27 #include <linux/of_address.h> 28 #include <linux/of_irq.h> 29 #include <linux/mfd/syscon.h> 30 #include <linux/reset-controller.h> 31 32 #include "hi6210-i2s.h" 33 34 struct hi6210_i2s { 35 struct device *dev; 36 struct reset_control *rc; 37 struct clk *clk[8]; 38 int clocks; 39 struct snd_soc_dai_driver dai; 40 void __iomem *base; 41 struct regmap *sysctrl; 42 phys_addr_t base_phys; 43 struct snd_dmaengine_dai_dma_data dma_data[2]; 44 int clk_rate; 45 spinlock_t lock; 46 int rate; 47 int format; 48 u8 bits; 49 u8 channels; 50 u8 id; 51 u8 channel_length; 52 u8 use; 53 u32 master:1; 54 u32 status:1; 55 }; 56 57 #define SC_PERIPH_CLKEN1 0x210 58 #define SC_PERIPH_CLKDIS1 0x214 59 60 #define SC_PERIPH_CLKEN3 0x230 61 #define SC_PERIPH_CLKDIS3 0x234 62 63 #define SC_PERIPH_CLKEN12 0x270 64 #define SC_PERIPH_CLKDIS12 0x274 65 66 #define SC_PERIPH_RSTEN1 0x310 67 #define SC_PERIPH_RSTDIS1 0x314 68 #define SC_PERIPH_RSTSTAT1 0x318 69 70 #define SC_PERIPH_RSTEN2 0x320 71 #define SC_PERIPH_RSTDIS2 0x324 72 #define SC_PERIPH_RSTSTAT2 0x328 73 74 #define SOC_PMCTRL_BBPPLLALIAS 0x48 75 76 enum { 77 CLK_DACODEC, 78 CLK_I2S_BASE, 79 }; 80 81 static inline void hi6210_write_reg(struct hi6210_i2s *i2s, int reg, u32 val) 82 { 83 writel(val, i2s->base + reg); 84 } 85 86 static inline u32 hi6210_read_reg(struct hi6210_i2s *i2s, int reg) 87 { 88 return readl(i2s->base + reg); 89 } 90 91 static int hi6210_i2s_startup(struct snd_pcm_substream *substream, 92 struct snd_soc_dai *cpu_dai) 93 { 94 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 95 int ret, n; 96 u32 val; 97 98 /* deassert reset on ABB */ 99 regmap_read(i2s->sysctrl, SC_PERIPH_RSTSTAT2, &val); 100 if (val & BIT(4)) 101 regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS2, BIT(4)); 102 103 for (n = 0; n < i2s->clocks; n++) { 104 ret = clk_prepare_enable(i2s->clk[n]); 105 if (ret) 106 goto err_unprepare_clk; 107 } 108 109 ret = clk_set_rate(i2s->clk[CLK_I2S_BASE], 49152000); 110 if (ret) { 111 dev_err(i2s->dev, "%s: setting 49.152MHz base rate failed %d\n", 112 __func__, ret); 113 goto err_unprepare_clk; 114 } 115 116 /* enable clock before frequency division */ 117 regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN12, BIT(9)); 118 119 /* enable codec working clock / == "codec bus clock" */ 120 regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN1, BIT(5)); 121 122 /* deassert reset on codec / interface clock / working clock */ 123 regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5)); 124 regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS1, BIT(5)); 125 126 /* not interested in i2s irqs */ 127 val = hi6210_read_reg(i2s, HII2S_CODEC_IRQ_MASK); 128 val |= 0x3f; 129 hi6210_write_reg(i2s, HII2S_CODEC_IRQ_MASK, val); 130 131 132 /* reset the stereo downlink fifo */ 133 val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1); 134 val |= (BIT(5) | BIT(4)); 135 hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val); 136 137 val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1); 138 val &= ~(BIT(5) | BIT(4)); 139 hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val); 140 141 142 val = hi6210_read_reg(i2s, HII2S_SW_RST_N); 143 val &= ~(HII2S_SW_RST_N__ST_DL_WORDLEN_MASK << 144 HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT); 145 val |= (HII2S_BITS_16 << HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT); 146 hi6210_write_reg(i2s, HII2S_SW_RST_N, val); 147 148 val = hi6210_read_reg(i2s, HII2S_MISC_CFG); 149 /* mux 11/12 = APB not i2s */ 150 val &= ~HII2S_MISC_CFG__ST_DL_TEST_SEL; 151 /* BT R ch 0 = mixer op of DACR ch */ 152 val &= ~HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL; 153 val &= ~HII2S_MISC_CFG__S2_DOUT_TEST_SEL; 154 155 val |= HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL; 156 /* BT L ch = 1 = mux 7 = "mixer output of DACL */ 157 val |= HII2S_MISC_CFG__S2_DOUT_TEST_SEL; 158 hi6210_write_reg(i2s, HII2S_MISC_CFG, val); 159 160 val = hi6210_read_reg(i2s, HII2S_SW_RST_N); 161 val |= HII2S_SW_RST_N__SW_RST_N; 162 hi6210_write_reg(i2s, HII2S_SW_RST_N, val); 163 164 return 0; 165 166 err_unprepare_clk: 167 while (n--) 168 clk_disable_unprepare(i2s->clk[n]); 169 return ret; 170 } 171 172 static void hi6210_i2s_shutdown(struct snd_pcm_substream *substream, 173 struct snd_soc_dai *cpu_dai) 174 { 175 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 176 int n; 177 178 for (n = 0; n < i2s->clocks; n++) 179 clk_disable_unprepare(i2s->clk[n]); 180 181 regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5)); 182 } 183 184 static void hi6210_i2s_txctrl(struct snd_soc_dai *cpu_dai, int on) 185 { 186 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 187 u32 val; 188 189 spin_lock(&i2s->lock); 190 if (on) { 191 /* enable S2 TX */ 192 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 193 val |= HII2S_I2S_CFG__S2_IF_TX_EN; 194 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 195 } else { 196 /* disable S2 TX */ 197 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 198 val &= ~HII2S_I2S_CFG__S2_IF_TX_EN; 199 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 200 } 201 spin_unlock(&i2s->lock); 202 } 203 204 static void hi6210_i2s_rxctrl(struct snd_soc_dai *cpu_dai, int on) 205 { 206 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 207 u32 val; 208 209 spin_lock(&i2s->lock); 210 if (on) { 211 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 212 val |= HII2S_I2S_CFG__S2_IF_RX_EN; 213 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 214 } else { 215 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 216 val &= ~HII2S_I2S_CFG__S2_IF_RX_EN; 217 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 218 } 219 spin_unlock(&i2s->lock); 220 } 221 222 static int hi6210_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) 223 { 224 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 225 226 /* 227 * We don't actually set the hardware until the hw_params 228 * call, but we need to validate the user input here. 229 */ 230 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 231 case SND_SOC_DAIFMT_CBM_CFM: 232 case SND_SOC_DAIFMT_CBS_CFS: 233 break; 234 default: 235 return -EINVAL; 236 } 237 238 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 239 case SND_SOC_DAIFMT_I2S: 240 case SND_SOC_DAIFMT_LEFT_J: 241 case SND_SOC_DAIFMT_RIGHT_J: 242 break; 243 default: 244 return -EINVAL; 245 } 246 247 i2s->format = fmt; 248 i2s->master = (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) == 249 SND_SOC_DAIFMT_CBS_CFS; 250 251 return 0; 252 } 253 254 static int hi6210_i2s_hw_params(struct snd_pcm_substream *substream, 255 struct snd_pcm_hw_params *params, 256 struct snd_soc_dai *cpu_dai) 257 { 258 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev); 259 u32 bits = 0, rate = 0, signed_data = 0, fmt = 0; 260 u32 val; 261 struct snd_dmaengine_dai_dma_data *dma_data; 262 263 switch (params_format(params)) { 264 case SNDRV_PCM_FORMAT_U16_LE: 265 signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT; 266 fallthrough; 267 case SNDRV_PCM_FORMAT_S16_LE: 268 bits = HII2S_BITS_16; 269 break; 270 case SNDRV_PCM_FORMAT_U24_LE: 271 signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT; 272 fallthrough; 273 case SNDRV_PCM_FORMAT_S24_LE: 274 bits = HII2S_BITS_24; 275 break; 276 default: 277 dev_err(cpu_dai->dev, "Bad format\n"); 278 return -EINVAL; 279 } 280 281 282 switch (params_rate(params)) { 283 case 8000: 284 rate = HII2S_FS_RATE_8KHZ; 285 break; 286 case 16000: 287 rate = HII2S_FS_RATE_16KHZ; 288 break; 289 case 32000: 290 rate = HII2S_FS_RATE_32KHZ; 291 break; 292 case 48000: 293 rate = HII2S_FS_RATE_48KHZ; 294 break; 295 case 96000: 296 rate = HII2S_FS_RATE_96KHZ; 297 break; 298 case 192000: 299 rate = HII2S_FS_RATE_192KHZ; 300 break; 301 default: 302 dev_err(cpu_dai->dev, "Bad rate: %d\n", params_rate(params)); 303 return -EINVAL; 304 } 305 306 if (!(params_channels(params))) { 307 dev_err(cpu_dai->dev, "Bad channels\n"); 308 return -EINVAL; 309 } 310 311 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream); 312 313 switch (bits) { 314 case HII2S_BITS_24: 315 i2s->bits = 32; 316 dma_data->addr_width = 3; 317 break; 318 default: 319 i2s->bits = 16; 320 dma_data->addr_width = 2; 321 break; 322 } 323 i2s->rate = params_rate(params); 324 i2s->channels = params_channels(params); 325 i2s->channel_length = i2s->channels * i2s->bits; 326 327 val = hi6210_read_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG); 328 val &= ~((HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_MASK << 329 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) | 330 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_MASK << 331 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) | 332 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_MASK << 333 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) | 334 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_MASK << 335 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT)); 336 val |= ((16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) | 337 (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) | 338 (16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) | 339 (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT)); 340 hi6210_write_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG, val); 341 342 343 val = hi6210_read_reg(i2s, HII2S_IF_CLK_EN_CFG); 344 val |= (BIT(19) | BIT(18) | BIT(17) | 345 HII2S_IF_CLK_EN_CFG__S2_IF_CLK_EN | 346 HII2S_IF_CLK_EN_CFG__S2_OL_MIXER_EN | 347 HII2S_IF_CLK_EN_CFG__S2_OL_SRC_EN | 348 HII2S_IF_CLK_EN_CFG__ST_DL_R_EN | 349 HII2S_IF_CLK_EN_CFG__ST_DL_L_EN); 350 hi6210_write_reg(i2s, HII2S_IF_CLK_EN_CFG, val); 351 352 353 val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG); 354 val &= ~(HII2S_DIG_FILTER_CLK_EN_CFG__DACR_SDM_EN | 355 HII2S_DIG_FILTER_CLK_EN_CFG__DACR_HBF2I_EN | 356 HII2S_DIG_FILTER_CLK_EN_CFG__DACR_AGC_EN | 357 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_SDM_EN | 358 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_HBF2I_EN | 359 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_AGC_EN); 360 val |= (HII2S_DIG_FILTER_CLK_EN_CFG__DACR_MIXER_EN | 361 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_MIXER_EN); 362 hi6210_write_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG, val); 363 364 365 val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG); 366 val &= ~(HII2S_DIG_FILTER_MODULE_CFG__DACR_MIXER_IN2_MUTE | 367 HII2S_DIG_FILTER_MODULE_CFG__DACL_MIXER_IN2_MUTE); 368 hi6210_write_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG, val); 369 370 val = hi6210_read_reg(i2s, HII2S_MUX_TOP_MODULE_CFG); 371 val &= ~(HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN1_MUTE | 372 HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN2_MUTE | 373 HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN1_MUTE | 374 HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN2_MUTE); 375 hi6210_write_reg(i2s, HII2S_MUX_TOP_MODULE_CFG, val); 376 377 378 switch (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) { 379 case SND_SOC_DAIFMT_CBM_CFM: 380 i2s->master = false; 381 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 382 val |= HII2S_I2S_CFG__S2_MST_SLV; 383 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 384 break; 385 case SND_SOC_DAIFMT_CBS_CFS: 386 i2s->master = true; 387 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 388 val &= ~HII2S_I2S_CFG__S2_MST_SLV; 389 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 390 break; 391 default: 392 WARN_ONCE(1, "Invalid i2s->fmt MASTER_MASK. This shouldn't happen\n"); 393 return -EINVAL; 394 } 395 396 switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) { 397 case SND_SOC_DAIFMT_I2S: 398 fmt = HII2S_FORMAT_I2S; 399 break; 400 case SND_SOC_DAIFMT_LEFT_J: 401 fmt = HII2S_FORMAT_LEFT_JUST; 402 break; 403 case SND_SOC_DAIFMT_RIGHT_J: 404 fmt = HII2S_FORMAT_RIGHT_JUST; 405 break; 406 default: 407 WARN_ONCE(1, "Invalid i2s->fmt FORMAT_MASK. This shouldn't happen\n"); 408 return -EINVAL; 409 } 410 411 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 412 val &= ~(HII2S_I2S_CFG__S2_FUNC_MODE_MASK << 413 HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT); 414 val |= fmt << HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT; 415 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 416 417 418 val = hi6210_read_reg(i2s, HII2S_CLK_SEL); 419 val &= ~(HII2S_CLK_SEL__I2S_BT_FM_SEL | /* BT gets the I2S */ 420 HII2S_CLK_SEL__EXT_12_288MHZ_SEL); 421 hi6210_write_reg(i2s, HII2S_CLK_SEL, val); 422 423 dma_data->maxburst = 2; 424 425 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 426 dma_data->addr = i2s->base_phys + HII2S_ST_DL_CHANNEL; 427 else 428 dma_data->addr = i2s->base_phys + HII2S_STEREO_UPLINK_CHANNEL; 429 430 switch (i2s->channels) { 431 case 1: 432 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 433 val |= HII2S_I2S_CFG__S2_FRAME_MODE; 434 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 435 break; 436 default: 437 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 438 val &= ~HII2S_I2S_CFG__S2_FRAME_MODE; 439 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 440 break; 441 } 442 443 /* clear loopback, set signed type and word length */ 444 val = hi6210_read_reg(i2s, HII2S_I2S_CFG); 445 val &= ~HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT; 446 val &= ~(HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_MASK << 447 HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT); 448 val &= ~(HII2S_I2S_CFG__S2_DIRECT_LOOP_MASK << 449 HII2S_I2S_CFG__S2_DIRECT_LOOP_SHIFT); 450 val |= signed_data; 451 val |= (bits << HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT); 452 hi6210_write_reg(i2s, HII2S_I2S_CFG, val); 453 454 455 if (!i2s->master) 456 return 0; 457 458 /* set DAC and related units to correct rate */ 459 val = hi6210_read_reg(i2s, HII2S_FS_CFG); 460 val &= ~(HII2S_FS_CFG__FS_S2_MASK << HII2S_FS_CFG__FS_S2_SHIFT); 461 val &= ~(HII2S_FS_CFG__FS_DACLR_MASK << HII2S_FS_CFG__FS_DACLR_SHIFT); 462 val &= ~(HII2S_FS_CFG__FS_ST_DL_R_MASK << 463 HII2S_FS_CFG__FS_ST_DL_R_SHIFT); 464 val &= ~(HII2S_FS_CFG__FS_ST_DL_L_MASK << 465 HII2S_FS_CFG__FS_ST_DL_L_SHIFT); 466 val |= (rate << HII2S_FS_CFG__FS_S2_SHIFT); 467 val |= (rate << HII2S_FS_CFG__FS_DACLR_SHIFT); 468 val |= (rate << HII2S_FS_CFG__FS_ST_DL_R_SHIFT); 469 val |= (rate << HII2S_FS_CFG__FS_ST_DL_L_SHIFT); 470 hi6210_write_reg(i2s, HII2S_FS_CFG, val); 471 472 return 0; 473 } 474 475 static int hi6210_i2s_trigger(struct snd_pcm_substream *substream, int cmd, 476 struct snd_soc_dai *cpu_dai) 477 { 478 pr_debug("%s\n", __func__); 479 switch (cmd) { 480 case SNDRV_PCM_TRIGGER_START: 481 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 482 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 483 hi6210_i2s_rxctrl(cpu_dai, 1); 484 else 485 hi6210_i2s_txctrl(cpu_dai, 1); 486 break; 487 case SNDRV_PCM_TRIGGER_STOP: 488 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 489 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 490 hi6210_i2s_rxctrl(cpu_dai, 0); 491 else 492 hi6210_i2s_txctrl(cpu_dai, 0); 493 break; 494 default: 495 dev_err(cpu_dai->dev, "unknown cmd\n"); 496 return -EINVAL; 497 } 498 return 0; 499 } 500 501 static int hi6210_i2s_dai_probe(struct snd_soc_dai *dai) 502 { 503 struct hi6210_i2s *i2s = snd_soc_dai_get_drvdata(dai); 504 505 snd_soc_dai_init_dma_data(dai, 506 &i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK], 507 &i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]); 508 509 return 0; 510 } 511 512 513 static const struct snd_soc_dai_ops hi6210_i2s_dai_ops = { 514 .trigger = hi6210_i2s_trigger, 515 .hw_params = hi6210_i2s_hw_params, 516 .set_fmt = hi6210_i2s_set_fmt, 517 .startup = hi6210_i2s_startup, 518 .shutdown = hi6210_i2s_shutdown, 519 }; 520 521 static const struct snd_soc_dai_driver hi6210_i2s_dai_init = { 522 .probe = hi6210_i2s_dai_probe, 523 .playback = { 524 .channels_min = 2, 525 .channels_max = 2, 526 .formats = SNDRV_PCM_FMTBIT_S16_LE | 527 SNDRV_PCM_FMTBIT_U16_LE, 528 .rates = SNDRV_PCM_RATE_48000, 529 }, 530 .capture = { 531 .channels_min = 2, 532 .channels_max = 2, 533 .formats = SNDRV_PCM_FMTBIT_S16_LE | 534 SNDRV_PCM_FMTBIT_U16_LE, 535 .rates = SNDRV_PCM_RATE_48000, 536 }, 537 .ops = &hi6210_i2s_dai_ops, 538 }; 539 540 static const struct snd_soc_component_driver hi6210_i2s_i2s_comp = { 541 .name = "hi6210_i2s-i2s", 542 }; 543 544 static int hi6210_i2s_probe(struct platform_device *pdev) 545 { 546 struct device_node *node = pdev->dev.of_node; 547 struct device *dev = &pdev->dev; 548 struct hi6210_i2s *i2s; 549 struct resource *res; 550 int ret; 551 552 i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); 553 if (!i2s) 554 return -ENOMEM; 555 556 i2s->dev = dev; 557 spin_lock_init(&i2s->lock); 558 559 i2s->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 560 if (IS_ERR(i2s->base)) 561 return PTR_ERR(i2s->base); 562 563 i2s->base_phys = (phys_addr_t)res->start; 564 i2s->dai = hi6210_i2s_dai_init; 565 566 dev_set_drvdata(dev, i2s); 567 568 i2s->sysctrl = syscon_regmap_lookup_by_phandle(node, 569 "hisilicon,sysctrl-syscon"); 570 if (IS_ERR(i2s->sysctrl)) 571 return PTR_ERR(i2s->sysctrl); 572 573 i2s->clk[CLK_DACODEC] = devm_clk_get(dev, "dacodec"); 574 if (IS_ERR(i2s->clk[CLK_DACODEC])) 575 return PTR_ERR(i2s->clk[CLK_DACODEC]); 576 i2s->clocks++; 577 578 i2s->clk[CLK_I2S_BASE] = devm_clk_get(dev, "i2s-base"); 579 if (IS_ERR(i2s->clk[CLK_I2S_BASE])) 580 return PTR_ERR(i2s->clk[CLK_I2S_BASE]); 581 i2s->clocks++; 582 583 ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0); 584 if (ret) 585 return ret; 586 587 ret = devm_snd_soc_register_component(dev, &hi6210_i2s_i2s_comp, 588 &i2s->dai, 1); 589 return ret; 590 } 591 592 static const struct of_device_id hi6210_i2s_dt_ids[] = { 593 { .compatible = "hisilicon,hi6210-i2s" }, 594 { /* sentinel */ } 595 }; 596 597 MODULE_DEVICE_TABLE(of, hi6210_i2s_dt_ids); 598 599 static struct platform_driver hi6210_i2s_driver = { 600 .probe = hi6210_i2s_probe, 601 .driver = { 602 .name = "hi6210_i2s", 603 .of_match_table = hi6210_i2s_dt_ids, 604 }, 605 }; 606 607 module_platform_driver(hi6210_i2s_driver); 608 609 MODULE_DESCRIPTION("Hisilicon HI6210 I2S driver"); 610 MODULE_AUTHOR("Andy Green <andy.green@linaro.org>"); 611 MODULE_LICENSE("GPL"); 612