1 /* 2 * pxa-ssp.c -- ALSA Soc Audio Layer 3 * 4 * Copyright 2005,2008 Wolfson Microelectronics PLC. 5 * Author: Liam Girdwood 6 * Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 * TODO: 14 * o Test network mode for > 16bit sample size 15 */ 16 17 #include <linux/init.h> 18 #include <linux/module.h> 19 #include <linux/slab.h> 20 #include <linux/platform_device.h> 21 #include <linux/clk.h> 22 #include <linux/io.h> 23 #include <linux/pxa2xx_ssp.h> 24 #include <linux/of.h> 25 #include <linux/dmaengine.h> 26 27 #include <asm/irq.h> 28 29 #include <sound/core.h> 30 #include <sound/pcm.h> 31 #include <sound/initval.h> 32 #include <sound/pcm_params.h> 33 #include <sound/soc.h> 34 #include <sound/pxa2xx-lib.h> 35 #include <sound/dmaengine_pcm.h> 36 37 #include "../../arm/pxa2xx-pcm.h" 38 #include "pxa-ssp.h" 39 40 /* 41 * SSP audio private data 42 */ 43 struct ssp_priv { 44 struct ssp_device *ssp; 45 unsigned int sysclk; 46 unsigned int dai_fmt; 47 unsigned int configured_dai_fmt; 48 #ifdef CONFIG_PM 49 uint32_t cr0; 50 uint32_t cr1; 51 uint32_t to; 52 uint32_t psp; 53 #endif 54 }; 55 56 static void dump_registers(struct ssp_device *ssp) 57 { 58 dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n", 59 pxa_ssp_read_reg(ssp, SSCR0), pxa_ssp_read_reg(ssp, SSCR1), 60 pxa_ssp_read_reg(ssp, SSTO)); 61 62 dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n", 63 pxa_ssp_read_reg(ssp, SSPSP), pxa_ssp_read_reg(ssp, SSSR), 64 pxa_ssp_read_reg(ssp, SSACD)); 65 } 66 67 static void pxa_ssp_enable(struct ssp_device *ssp) 68 { 69 uint32_t sscr0; 70 71 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) | SSCR0_SSE; 72 __raw_writel(sscr0, ssp->mmio_base + SSCR0); 73 } 74 75 static void pxa_ssp_disable(struct ssp_device *ssp) 76 { 77 uint32_t sscr0; 78 79 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) & ~SSCR0_SSE; 80 __raw_writel(sscr0, ssp->mmio_base + SSCR0); 81 } 82 83 static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4, 84 int out, struct snd_dmaengine_dai_dma_data *dma) 85 { 86 dma->addr_width = width4 ? DMA_SLAVE_BUSWIDTH_4_BYTES : 87 DMA_SLAVE_BUSWIDTH_2_BYTES; 88 dma->maxburst = 16; 89 dma->addr = ssp->phys_base + SSDR; 90 } 91 92 static int pxa_ssp_startup(struct snd_pcm_substream *substream, 93 struct snd_soc_dai *cpu_dai) 94 { 95 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 96 struct ssp_device *ssp = priv->ssp; 97 struct snd_dmaengine_dai_dma_data *dma; 98 int ret = 0; 99 100 if (!cpu_dai->active) { 101 clk_prepare_enable(ssp->clk); 102 pxa_ssp_disable(ssp); 103 } 104 105 dma = kzalloc(sizeof(struct snd_dmaengine_dai_dma_data), GFP_KERNEL); 106 if (!dma) 107 return -ENOMEM; 108 109 dma->filter_data = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 110 &ssp->drcmr_tx : &ssp->drcmr_rx; 111 112 snd_soc_dai_set_dma_data(cpu_dai, substream, dma); 113 114 return ret; 115 } 116 117 static void pxa_ssp_shutdown(struct snd_pcm_substream *substream, 118 struct snd_soc_dai *cpu_dai) 119 { 120 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 121 struct ssp_device *ssp = priv->ssp; 122 123 if (!cpu_dai->active) { 124 pxa_ssp_disable(ssp); 125 clk_disable_unprepare(ssp->clk); 126 } 127 128 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream)); 129 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL); 130 } 131 132 #ifdef CONFIG_PM 133 134 static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai) 135 { 136 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 137 struct ssp_device *ssp = priv->ssp; 138 139 if (!cpu_dai->active) 140 clk_prepare_enable(ssp->clk); 141 142 priv->cr0 = __raw_readl(ssp->mmio_base + SSCR0); 143 priv->cr1 = __raw_readl(ssp->mmio_base + SSCR1); 144 priv->to = __raw_readl(ssp->mmio_base + SSTO); 145 priv->psp = __raw_readl(ssp->mmio_base + SSPSP); 146 147 pxa_ssp_disable(ssp); 148 clk_disable_unprepare(ssp->clk); 149 return 0; 150 } 151 152 static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai) 153 { 154 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 155 struct ssp_device *ssp = priv->ssp; 156 uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE; 157 158 clk_prepare_enable(ssp->clk); 159 160 __raw_writel(sssr, ssp->mmio_base + SSSR); 161 __raw_writel(priv->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0); 162 __raw_writel(priv->cr1, ssp->mmio_base + SSCR1); 163 __raw_writel(priv->to, ssp->mmio_base + SSTO); 164 __raw_writel(priv->psp, ssp->mmio_base + SSPSP); 165 166 if (cpu_dai->active) 167 pxa_ssp_enable(ssp); 168 else 169 clk_disable_unprepare(ssp->clk); 170 171 return 0; 172 } 173 174 #else 175 #define pxa_ssp_suspend NULL 176 #define pxa_ssp_resume NULL 177 #endif 178 179 /** 180 * ssp_set_clkdiv - set SSP clock divider 181 * @div: serial clock rate divider 182 */ 183 static void pxa_ssp_set_scr(struct ssp_device *ssp, u32 div) 184 { 185 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0); 186 187 if (ssp->type == PXA25x_SSP) { 188 sscr0 &= ~0x0000ff00; 189 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */ 190 } else { 191 sscr0 &= ~0x000fff00; 192 sscr0 |= (div - 1) << 8; /* 1..4096 */ 193 } 194 pxa_ssp_write_reg(ssp, SSCR0, sscr0); 195 } 196 197 /** 198 * pxa_ssp_get_clkdiv - get SSP clock divider 199 */ 200 static u32 pxa_ssp_get_scr(struct ssp_device *ssp) 201 { 202 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0); 203 u32 div; 204 205 if (ssp->type == PXA25x_SSP) 206 div = ((sscr0 >> 8) & 0xff) * 2 + 2; 207 else 208 div = ((sscr0 >> 8) & 0xfff) + 1; 209 return div; 210 } 211 212 /* 213 * Set the SSP ports SYSCLK. 214 */ 215 static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai, 216 int clk_id, unsigned int freq, int dir) 217 { 218 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 219 struct ssp_device *ssp = priv->ssp; 220 221 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & 222 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS); 223 224 dev_dbg(&ssp->pdev->dev, 225 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n", 226 cpu_dai->id, clk_id, freq); 227 228 switch (clk_id) { 229 case PXA_SSP_CLK_NET_PLL: 230 sscr0 |= SSCR0_MOD; 231 break; 232 case PXA_SSP_CLK_PLL: 233 /* Internal PLL is fixed */ 234 if (ssp->type == PXA25x_SSP) 235 priv->sysclk = 1843200; 236 else 237 priv->sysclk = 13000000; 238 break; 239 case PXA_SSP_CLK_EXT: 240 priv->sysclk = freq; 241 sscr0 |= SSCR0_ECS; 242 break; 243 case PXA_SSP_CLK_NET: 244 priv->sysclk = freq; 245 sscr0 |= SSCR0_NCS | SSCR0_MOD; 246 break; 247 case PXA_SSP_CLK_AUDIO: 248 priv->sysclk = 0; 249 pxa_ssp_set_scr(ssp, 1); 250 sscr0 |= SSCR0_ACS; 251 break; 252 default: 253 return -ENODEV; 254 } 255 256 /* The SSP clock must be disabled when changing SSP clock mode 257 * on PXA2xx. On PXA3xx it must be enabled when doing so. */ 258 if (ssp->type != PXA3xx_SSP) 259 clk_disable_unprepare(ssp->clk); 260 pxa_ssp_write_reg(ssp, SSCR0, sscr0); 261 if (ssp->type != PXA3xx_SSP) 262 clk_prepare_enable(ssp->clk); 263 264 return 0; 265 } 266 267 /* 268 * Set the SSP clock dividers. 269 */ 270 static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai, 271 int div_id, int div) 272 { 273 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 274 struct ssp_device *ssp = priv->ssp; 275 int val; 276 277 switch (div_id) { 278 case PXA_SSP_AUDIO_DIV_ACDS: 279 val = (pxa_ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div); 280 pxa_ssp_write_reg(ssp, SSACD, val); 281 break; 282 case PXA_SSP_AUDIO_DIV_SCDB: 283 val = pxa_ssp_read_reg(ssp, SSACD); 284 val &= ~SSACD_SCDB; 285 if (ssp->type == PXA3xx_SSP) 286 val &= ~SSACD_SCDX8; 287 switch (div) { 288 case PXA_SSP_CLK_SCDB_1: 289 val |= SSACD_SCDB; 290 break; 291 case PXA_SSP_CLK_SCDB_4: 292 break; 293 case PXA_SSP_CLK_SCDB_8: 294 if (ssp->type == PXA3xx_SSP) 295 val |= SSACD_SCDX8; 296 else 297 return -EINVAL; 298 break; 299 default: 300 return -EINVAL; 301 } 302 pxa_ssp_write_reg(ssp, SSACD, val); 303 break; 304 case PXA_SSP_DIV_SCR: 305 pxa_ssp_set_scr(ssp, div); 306 break; 307 default: 308 return -ENODEV; 309 } 310 311 return 0; 312 } 313 314 /* 315 * Configure the PLL frequency pxa27x and (afaik - pxa320 only) 316 */ 317 static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id, 318 int source, unsigned int freq_in, unsigned int freq_out) 319 { 320 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 321 struct ssp_device *ssp = priv->ssp; 322 u32 ssacd = pxa_ssp_read_reg(ssp, SSACD) & ~0x70; 323 324 if (ssp->type == PXA3xx_SSP) 325 pxa_ssp_write_reg(ssp, SSACDD, 0); 326 327 switch (freq_out) { 328 case 5622000: 329 break; 330 case 11345000: 331 ssacd |= (0x1 << 4); 332 break; 333 case 12235000: 334 ssacd |= (0x2 << 4); 335 break; 336 case 14857000: 337 ssacd |= (0x3 << 4); 338 break; 339 case 32842000: 340 ssacd |= (0x4 << 4); 341 break; 342 case 48000000: 343 ssacd |= (0x5 << 4); 344 break; 345 case 0: 346 /* Disable */ 347 break; 348 349 default: 350 /* PXA3xx has a clock ditherer which can be used to generate 351 * a wider range of frequencies - calculate a value for it. 352 */ 353 if (ssp->type == PXA3xx_SSP) { 354 u32 val; 355 u64 tmp = 19968; 356 357 tmp *= 1000000; 358 do_div(tmp, freq_out); 359 val = tmp; 360 361 val = (val << 16) | 64; 362 pxa_ssp_write_reg(ssp, SSACDD, val); 363 364 ssacd |= (0x6 << 4); 365 366 dev_dbg(&ssp->pdev->dev, 367 "Using SSACDD %x to supply %uHz\n", 368 val, freq_out); 369 break; 370 } 371 372 return -EINVAL; 373 } 374 375 pxa_ssp_write_reg(ssp, SSACD, ssacd); 376 377 return 0; 378 } 379 380 /* 381 * Set the active slots in TDM/Network mode 382 */ 383 static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, 384 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) 385 { 386 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 387 struct ssp_device *ssp = priv->ssp; 388 u32 sscr0; 389 390 sscr0 = pxa_ssp_read_reg(ssp, SSCR0); 391 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS); 392 393 /* set slot width */ 394 if (slot_width > 16) 395 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16); 396 else 397 sscr0 |= SSCR0_DataSize(slot_width); 398 399 if (slots > 1) { 400 /* enable network mode */ 401 sscr0 |= SSCR0_MOD; 402 403 /* set number of active slots */ 404 sscr0 |= SSCR0_SlotsPerFrm(slots); 405 406 /* set active slot mask */ 407 pxa_ssp_write_reg(ssp, SSTSA, tx_mask); 408 pxa_ssp_write_reg(ssp, SSRSA, rx_mask); 409 } 410 pxa_ssp_write_reg(ssp, SSCR0, sscr0); 411 412 return 0; 413 } 414 415 /* 416 * Tristate the SSP DAI lines 417 */ 418 static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai, 419 int tristate) 420 { 421 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 422 struct ssp_device *ssp = priv->ssp; 423 u32 sscr1; 424 425 sscr1 = pxa_ssp_read_reg(ssp, SSCR1); 426 if (tristate) 427 sscr1 &= ~SSCR1_TTE; 428 else 429 sscr1 |= SSCR1_TTE; 430 pxa_ssp_write_reg(ssp, SSCR1, sscr1); 431 432 return 0; 433 } 434 435 static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai, 436 unsigned int fmt) 437 { 438 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 439 440 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 441 case SND_SOC_DAIFMT_CBM_CFM: 442 case SND_SOC_DAIFMT_CBM_CFS: 443 case SND_SOC_DAIFMT_CBS_CFS: 444 break; 445 default: 446 return -EINVAL; 447 } 448 449 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 450 case SND_SOC_DAIFMT_NB_NF: 451 case SND_SOC_DAIFMT_NB_IF: 452 case SND_SOC_DAIFMT_IB_IF: 453 case SND_SOC_DAIFMT_IB_NF: 454 break; 455 default: 456 return -EINVAL; 457 } 458 459 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 460 case SND_SOC_DAIFMT_I2S: 461 case SND_SOC_DAIFMT_DSP_A: 462 case SND_SOC_DAIFMT_DSP_B: 463 break; 464 465 default: 466 return -EINVAL; 467 } 468 469 /* Settings will be applied in hw_params() */ 470 priv->dai_fmt = fmt; 471 472 return 0; 473 } 474 475 /* 476 * Set up the SSP DAI format. 477 * The SSP Port must be inactive before calling this function as the 478 * physical interface format is changed. 479 */ 480 static int pxa_ssp_configure_dai_fmt(struct ssp_priv *priv) 481 { 482 struct ssp_device *ssp = priv->ssp; 483 u32 sscr0, sscr1, sspsp, scfr; 484 485 /* check if we need to change anything at all */ 486 if (priv->configured_dai_fmt == priv->dai_fmt) 487 return 0; 488 489 /* reset port settings */ 490 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & 491 ~(SSCR0_PSP | SSCR0_MOD); 492 sscr1 = pxa_ssp_read_reg(ssp, SSCR1) & 493 ~(SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR | 494 SSCR1_RWOT | SSCR1_TRAIL | SSCR1_TFT | SSCR1_RFT); 495 sspsp = pxa_ssp_read_reg(ssp, SSPSP) & 496 ~(SSPSP_SFRMP | SSPSP_SCMODE(3)); 497 498 sscr1 |= SSCR1_RxTresh(8) | SSCR1_TxTresh(7); 499 500 switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { 501 case SND_SOC_DAIFMT_CBM_CFM: 502 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR; 503 break; 504 case SND_SOC_DAIFMT_CBM_CFS: 505 sscr1 |= SSCR1_SCLKDIR | SSCR1_SCFR; 506 break; 507 case SND_SOC_DAIFMT_CBS_CFS: 508 break; 509 default: 510 return -EINVAL; 511 } 512 513 switch (priv->dai_fmt & SND_SOC_DAIFMT_INV_MASK) { 514 case SND_SOC_DAIFMT_NB_NF: 515 sspsp |= SSPSP_SFRMP; 516 break; 517 case SND_SOC_DAIFMT_NB_IF: 518 break; 519 case SND_SOC_DAIFMT_IB_IF: 520 sspsp |= SSPSP_SCMODE(2); 521 break; 522 case SND_SOC_DAIFMT_IB_NF: 523 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP; 524 break; 525 default: 526 return -EINVAL; 527 } 528 529 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 530 case SND_SOC_DAIFMT_I2S: 531 sscr0 |= SSCR0_PSP; 532 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL; 533 /* See hw_params() */ 534 break; 535 536 case SND_SOC_DAIFMT_DSP_A: 537 sspsp |= SSPSP_FSRT; 538 case SND_SOC_DAIFMT_DSP_B: 539 sscr0 |= SSCR0_MOD | SSCR0_PSP; 540 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT; 541 break; 542 543 default: 544 return -EINVAL; 545 } 546 547 pxa_ssp_write_reg(ssp, SSCR0, sscr0); 548 pxa_ssp_write_reg(ssp, SSCR1, sscr1); 549 pxa_ssp_write_reg(ssp, SSPSP, sspsp); 550 551 switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { 552 case SND_SOC_DAIFMT_CBM_CFM: 553 case SND_SOC_DAIFMT_CBM_CFS: 554 scfr = pxa_ssp_read_reg(ssp, SSCR1) | SSCR1_SCFR; 555 pxa_ssp_write_reg(ssp, SSCR1, scfr); 556 557 while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY) 558 cpu_relax(); 559 break; 560 } 561 562 dump_registers(ssp); 563 564 /* Since we are configuring the timings for the format by hand 565 * we have to defer some things until hw_params() where we 566 * know parameters like the sample size. 567 */ 568 priv->configured_dai_fmt = priv->dai_fmt; 569 570 return 0; 571 } 572 573 /* 574 * Set the SSP audio DMA parameters and sample size. 575 * Can be called multiple times by oss emulation. 576 */ 577 static int pxa_ssp_hw_params(struct snd_pcm_substream *substream, 578 struct snd_pcm_hw_params *params, 579 struct snd_soc_dai *cpu_dai) 580 { 581 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 582 struct ssp_device *ssp = priv->ssp; 583 int chn = params_channels(params); 584 u32 sscr0; 585 u32 sspsp; 586 int width = snd_pcm_format_physical_width(params_format(params)); 587 int ttsa = pxa_ssp_read_reg(ssp, SSTSA) & 0xf; 588 struct snd_dmaengine_dai_dma_data *dma_data; 589 int ret; 590 591 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream); 592 593 /* Network mode with one active slot (ttsa == 1) can be used 594 * to force 16-bit frame width on the wire (for S16_LE), even 595 * with two channels. Use 16-bit DMA transfers for this case. 596 */ 597 pxa_ssp_set_dma_params(ssp, 598 ((chn == 2) && (ttsa != 1)) || (width == 32), 599 substream->stream == SNDRV_PCM_STREAM_PLAYBACK, dma_data); 600 601 /* we can only change the settings if the port is not in use */ 602 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) 603 return 0; 604 605 ret = pxa_ssp_configure_dai_fmt(priv); 606 if (ret < 0) 607 return ret; 608 609 /* clear selected SSP bits */ 610 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS); 611 612 /* bit size */ 613 switch (params_format(params)) { 614 case SNDRV_PCM_FORMAT_S16_LE: 615 if (ssp->type == PXA3xx_SSP) 616 sscr0 |= SSCR0_FPCKE; 617 sscr0 |= SSCR0_DataSize(16); 618 break; 619 case SNDRV_PCM_FORMAT_S24_LE: 620 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8)); 621 break; 622 case SNDRV_PCM_FORMAT_S32_LE: 623 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16)); 624 break; 625 } 626 pxa_ssp_write_reg(ssp, SSCR0, sscr0); 627 628 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 629 case SND_SOC_DAIFMT_I2S: 630 sspsp = pxa_ssp_read_reg(ssp, SSPSP); 631 632 if ((pxa_ssp_get_scr(ssp) == 4) && (width == 16)) { 633 /* This is a special case where the bitclk is 64fs 634 * and we're not dealing with 2*32 bits of audio 635 * samples. 636 * 637 * The SSP values used for that are all found out by 638 * trying and failing a lot; some of the registers 639 * needed for that mode are only available on PXA3xx. 640 */ 641 if (ssp->type != PXA3xx_SSP) 642 return -EINVAL; 643 644 sspsp |= SSPSP_SFRMWDTH(width * 2); 645 sspsp |= SSPSP_SFRMDLY(width * 4); 646 sspsp |= SSPSP_EDMYSTOP(3); 647 sspsp |= SSPSP_DMYSTOP(3); 648 sspsp |= SSPSP_DMYSTRT(1); 649 } else { 650 /* The frame width is the width the LRCLK is 651 * asserted for; the delay is expressed in 652 * half cycle units. We need the extra cycle 653 * because the data starts clocking out one BCLK 654 * after LRCLK changes polarity. 655 */ 656 sspsp |= SSPSP_SFRMWDTH(width + 1); 657 sspsp |= SSPSP_SFRMDLY((width + 1) * 2); 658 sspsp |= SSPSP_DMYSTRT(1); 659 } 660 661 pxa_ssp_write_reg(ssp, SSPSP, sspsp); 662 break; 663 default: 664 break; 665 } 666 667 /* When we use a network mode, we always require TDM slots 668 * - complain loudly and fail if they've not been set up yet. 669 */ 670 if ((sscr0 & SSCR0_MOD) && !ttsa) { 671 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n"); 672 return -EINVAL; 673 } 674 675 dump_registers(ssp); 676 677 return 0; 678 } 679 680 static void pxa_ssp_set_running_bit(struct snd_pcm_substream *substream, 681 struct ssp_device *ssp, int value) 682 { 683 uint32_t sscr0 = pxa_ssp_read_reg(ssp, SSCR0); 684 uint32_t sscr1 = pxa_ssp_read_reg(ssp, SSCR1); 685 uint32_t sspsp = pxa_ssp_read_reg(ssp, SSPSP); 686 uint32_t sssr = pxa_ssp_read_reg(ssp, SSSR); 687 688 if (value && (sscr0 & SSCR0_SSE)) 689 pxa_ssp_write_reg(ssp, SSCR0, sscr0 & ~SSCR0_SSE); 690 691 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 692 if (value) 693 sscr1 |= SSCR1_TSRE; 694 else 695 sscr1 &= ~SSCR1_TSRE; 696 } else { 697 if (value) 698 sscr1 |= SSCR1_RSRE; 699 else 700 sscr1 &= ~SSCR1_RSRE; 701 } 702 703 pxa_ssp_write_reg(ssp, SSCR1, sscr1); 704 705 if (value) { 706 pxa_ssp_write_reg(ssp, SSSR, sssr); 707 pxa_ssp_write_reg(ssp, SSPSP, sspsp); 708 pxa_ssp_write_reg(ssp, SSCR0, sscr0 | SSCR0_SSE); 709 } 710 } 711 712 static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd, 713 struct snd_soc_dai *cpu_dai) 714 { 715 int ret = 0; 716 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); 717 struct ssp_device *ssp = priv->ssp; 718 int val; 719 720 switch (cmd) { 721 case SNDRV_PCM_TRIGGER_RESUME: 722 pxa_ssp_enable(ssp); 723 break; 724 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 725 pxa_ssp_set_running_bit(substream, ssp, 1); 726 val = pxa_ssp_read_reg(ssp, SSSR); 727 pxa_ssp_write_reg(ssp, SSSR, val); 728 break; 729 case SNDRV_PCM_TRIGGER_START: 730 pxa_ssp_set_running_bit(substream, ssp, 1); 731 break; 732 case SNDRV_PCM_TRIGGER_STOP: 733 pxa_ssp_set_running_bit(substream, ssp, 0); 734 break; 735 case SNDRV_PCM_TRIGGER_SUSPEND: 736 pxa_ssp_disable(ssp); 737 break; 738 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 739 pxa_ssp_set_running_bit(substream, ssp, 0); 740 break; 741 742 default: 743 ret = -EINVAL; 744 } 745 746 dump_registers(ssp); 747 748 return ret; 749 } 750 751 static int pxa_ssp_probe(struct snd_soc_dai *dai) 752 { 753 struct device *dev = dai->dev; 754 struct ssp_priv *priv; 755 int ret; 756 757 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL); 758 if (!priv) 759 return -ENOMEM; 760 761 if (dev->of_node) { 762 struct device_node *ssp_handle; 763 764 ssp_handle = of_parse_phandle(dev->of_node, "port", 0); 765 if (!ssp_handle) { 766 dev_err(dev, "unable to get 'port' phandle\n"); 767 ret = -ENODEV; 768 goto err_priv; 769 } 770 771 priv->ssp = pxa_ssp_request_of(ssp_handle, "SoC audio"); 772 if (priv->ssp == NULL) { 773 ret = -ENODEV; 774 goto err_priv; 775 } 776 } else { 777 priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio"); 778 if (priv->ssp == NULL) { 779 ret = -ENODEV; 780 goto err_priv; 781 } 782 } 783 784 priv->dai_fmt = (unsigned int) -1; 785 snd_soc_dai_set_drvdata(dai, priv); 786 787 return 0; 788 789 err_priv: 790 kfree(priv); 791 return ret; 792 } 793 794 static int pxa_ssp_remove(struct snd_soc_dai *dai) 795 { 796 struct ssp_priv *priv = snd_soc_dai_get_drvdata(dai); 797 798 pxa_ssp_free(priv->ssp); 799 kfree(priv); 800 return 0; 801 } 802 803 #define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 804 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ 805 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 806 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \ 807 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) 808 809 #define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) 810 811 static const struct snd_soc_dai_ops pxa_ssp_dai_ops = { 812 .startup = pxa_ssp_startup, 813 .shutdown = pxa_ssp_shutdown, 814 .trigger = pxa_ssp_trigger, 815 .hw_params = pxa_ssp_hw_params, 816 .set_sysclk = pxa_ssp_set_dai_sysclk, 817 .set_clkdiv = pxa_ssp_set_dai_clkdiv, 818 .set_pll = pxa_ssp_set_dai_pll, 819 .set_fmt = pxa_ssp_set_dai_fmt, 820 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot, 821 .set_tristate = pxa_ssp_set_dai_tristate, 822 }; 823 824 static struct snd_soc_dai_driver pxa_ssp_dai = { 825 .probe = pxa_ssp_probe, 826 .remove = pxa_ssp_remove, 827 .suspend = pxa_ssp_suspend, 828 .resume = pxa_ssp_resume, 829 .playback = { 830 .channels_min = 1, 831 .channels_max = 8, 832 .rates = PXA_SSP_RATES, 833 .formats = PXA_SSP_FORMATS, 834 }, 835 .capture = { 836 .channels_min = 1, 837 .channels_max = 8, 838 .rates = PXA_SSP_RATES, 839 .formats = PXA_SSP_FORMATS, 840 }, 841 .ops = &pxa_ssp_dai_ops, 842 }; 843 844 static const struct snd_soc_component_driver pxa_ssp_component = { 845 .name = "pxa-ssp", 846 }; 847 848 #ifdef CONFIG_OF 849 static const struct of_device_id pxa_ssp_of_ids[] = { 850 { .compatible = "mrvl,pxa-ssp-dai" }, 851 {} 852 }; 853 MODULE_DEVICE_TABLE(of, pxa_ssp_of_ids); 854 #endif 855 856 static int asoc_ssp_probe(struct platform_device *pdev) 857 { 858 return devm_snd_soc_register_component(&pdev->dev, &pxa_ssp_component, 859 &pxa_ssp_dai, 1); 860 } 861 862 static struct platform_driver asoc_ssp_driver = { 863 .driver = { 864 .name = "pxa-ssp-dai", 865 .of_match_table = of_match_ptr(pxa_ssp_of_ids), 866 }, 867 868 .probe = asoc_ssp_probe, 869 }; 870 871 module_platform_driver(asoc_ssp_driver); 872 873 /* Module information */ 874 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 875 MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface"); 876 MODULE_LICENSE("GPL"); 877 MODULE_ALIAS("platform:pxa-ssp-dai"); 878