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