1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ALSA SoC McASP Audio Layer for TI DAVINCI processor 4 * 5 * Multi-channel Audio Serial Port Driver 6 * 7 * Author: Nirmal Pandey <n-pandey@ti.com>, 8 * Suresh Rajashekara <suresh.r@ti.com> 9 * Steve Chen <schen@.mvista.com> 10 * 11 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com> 12 * Copyright: (C) 2009 Texas Instruments, India 13 */ 14 15 #include <linux/init.h> 16 #include <linux/module.h> 17 #include <linux/device.h> 18 #include <linux/slab.h> 19 #include <linux/delay.h> 20 #include <linux/io.h> 21 #include <linux/clk.h> 22 #include <linux/pm_runtime.h> 23 #include <linux/of.h> 24 #include <linux/of_platform.h> 25 #include <linux/of_device.h> 26 #include <linux/platform_data/davinci_asp.h> 27 #include <linux/math64.h> 28 #include <linux/bitmap.h> 29 #include <linux/gpio/driver.h> 30 31 #include <sound/asoundef.h> 32 #include <sound/core.h> 33 #include <sound/pcm.h> 34 #include <sound/pcm_params.h> 35 #include <sound/initval.h> 36 #include <sound/soc.h> 37 #include <sound/dmaengine_pcm.h> 38 39 #include "edma-pcm.h" 40 #include "sdma-pcm.h" 41 #include "udma-pcm.h" 42 #include "davinci-mcasp.h" 43 44 #define MCASP_MAX_AFIFO_DEPTH 64 45 46 #ifdef CONFIG_PM 47 static u32 context_regs[] = { 48 DAVINCI_MCASP_TXFMCTL_REG, 49 DAVINCI_MCASP_RXFMCTL_REG, 50 DAVINCI_MCASP_TXFMT_REG, 51 DAVINCI_MCASP_RXFMT_REG, 52 DAVINCI_MCASP_ACLKXCTL_REG, 53 DAVINCI_MCASP_ACLKRCTL_REG, 54 DAVINCI_MCASP_AHCLKXCTL_REG, 55 DAVINCI_MCASP_AHCLKRCTL_REG, 56 DAVINCI_MCASP_PDIR_REG, 57 DAVINCI_MCASP_PFUNC_REG, 58 DAVINCI_MCASP_RXMASK_REG, 59 DAVINCI_MCASP_TXMASK_REG, 60 DAVINCI_MCASP_RXTDM_REG, 61 DAVINCI_MCASP_TXTDM_REG, 62 }; 63 64 struct davinci_mcasp_context { 65 u32 config_regs[ARRAY_SIZE(context_regs)]; 66 u32 afifo_regs[2]; /* for read/write fifo control registers */ 67 u32 *xrsr_regs; /* for serializer configuration */ 68 bool pm_state; 69 }; 70 #endif 71 72 struct davinci_mcasp_ruledata { 73 struct davinci_mcasp *mcasp; 74 int serializers; 75 }; 76 77 struct davinci_mcasp { 78 struct snd_dmaengine_dai_dma_data dma_data[2]; 79 struct davinci_mcasp_pdata *pdata; 80 void __iomem *base; 81 u32 fifo_base; 82 struct device *dev; 83 struct snd_pcm_substream *substreams[2]; 84 unsigned int dai_fmt; 85 86 u32 iec958_status; 87 88 /* Audio can not be enabled due to missing parameter(s) */ 89 bool missing_audio_param; 90 91 /* McASP specific data */ 92 int tdm_slots; 93 u32 tdm_mask[2]; 94 int slot_width; 95 u8 op_mode; 96 u8 dismod; 97 u8 num_serializer; 98 u8 *serial_dir; 99 u8 version; 100 u8 bclk_div; 101 int streams; 102 u32 irq_request[2]; 103 104 int sysclk_freq; 105 bool bclk_master; 106 u32 auxclk_fs_ratio; 107 108 unsigned long pdir; /* Pin direction bitfield */ 109 110 /* McASP FIFO related */ 111 u8 txnumevt; 112 u8 rxnumevt; 113 114 bool dat_port; 115 116 /* Used for comstraint setting on the second stream */ 117 u32 channels; 118 int max_format_width; 119 u8 active_serializers[2]; 120 121 #ifdef CONFIG_GPIOLIB 122 struct gpio_chip gpio_chip; 123 #endif 124 125 #ifdef CONFIG_PM 126 struct davinci_mcasp_context context; 127 #endif 128 129 struct davinci_mcasp_ruledata ruledata[2]; 130 struct snd_pcm_hw_constraint_list chconstr[2]; 131 }; 132 133 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset, 134 u32 val) 135 { 136 void __iomem *reg = mcasp->base + offset; 137 __raw_writel(__raw_readl(reg) | val, reg); 138 } 139 140 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset, 141 u32 val) 142 { 143 void __iomem *reg = mcasp->base + offset; 144 __raw_writel((__raw_readl(reg) & ~(val)), reg); 145 } 146 147 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset, 148 u32 val, u32 mask) 149 { 150 void __iomem *reg = mcasp->base + offset; 151 __raw_writel((__raw_readl(reg) & ~mask) | val, reg); 152 } 153 154 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset, 155 u32 val) 156 { 157 __raw_writel(val, mcasp->base + offset); 158 } 159 160 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset) 161 { 162 return (u32)__raw_readl(mcasp->base + offset); 163 } 164 165 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val) 166 { 167 int i = 0; 168 169 mcasp_set_bits(mcasp, ctl_reg, val); 170 171 /* programming GBLCTL needs to read back from GBLCTL and verfiy */ 172 /* loop count is to avoid the lock-up */ 173 for (i = 0; i < 1000; i++) { 174 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val) 175 break; 176 } 177 178 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val)) 179 printk(KERN_ERR "GBLCTL write error\n"); 180 } 181 182 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp) 183 { 184 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG); 185 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG); 186 187 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE; 188 } 189 190 static inline void mcasp_set_clk_pdir(struct davinci_mcasp *mcasp, bool enable) 191 { 192 u32 bit = PIN_BIT_AMUTE; 193 194 for_each_set_bit_from(bit, &mcasp->pdir, PIN_BIT_AFSR + 1) { 195 if (enable) 196 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); 197 else 198 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); 199 } 200 } 201 202 static inline void mcasp_set_axr_pdir(struct davinci_mcasp *mcasp, bool enable) 203 { 204 u32 bit; 205 206 for_each_set_bit(bit, &mcasp->pdir, PIN_BIT_AMUTE) { 207 if (enable) 208 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); 209 else 210 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); 211 } 212 } 213 214 static void mcasp_start_rx(struct davinci_mcasp *mcasp) 215 { 216 if (mcasp->rxnumevt) { /* enable FIFO */ 217 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; 218 219 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); 220 mcasp_set_bits(mcasp, reg, FIFO_ENABLE); 221 } 222 223 /* Start clocks */ 224 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST); 225 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST); 226 /* 227 * When ASYNC == 0 the transmit and receive sections operate 228 * synchronously from the transmit clock and frame sync. We need to make 229 * sure that the TX signlas are enabled when starting reception. 230 */ 231 if (mcasp_is_synchronous(mcasp)) { 232 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST); 233 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST); 234 mcasp_set_clk_pdir(mcasp, true); 235 } 236 237 /* Activate serializer(s) */ 238 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); 239 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR); 240 /* Release RX state machine */ 241 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST); 242 /* Release Frame Sync generator */ 243 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST); 244 if (mcasp_is_synchronous(mcasp)) 245 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST); 246 247 /* enable receive IRQs */ 248 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG, 249 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]); 250 } 251 252 static void mcasp_start_tx(struct davinci_mcasp *mcasp) 253 { 254 u32 cnt; 255 256 if (mcasp->txnumevt) { /* enable FIFO */ 257 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; 258 259 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); 260 mcasp_set_bits(mcasp, reg, FIFO_ENABLE); 261 } 262 263 /* Start clocks */ 264 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST); 265 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST); 266 mcasp_set_clk_pdir(mcasp, true); 267 268 /* Activate serializer(s) */ 269 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); 270 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR); 271 272 /* wait for XDATA to be cleared */ 273 cnt = 0; 274 while ((mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) & XRDATA) && 275 (cnt < 100000)) 276 cnt++; 277 278 mcasp_set_axr_pdir(mcasp, true); 279 280 /* Release TX state machine */ 281 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST); 282 /* Release Frame Sync generator */ 283 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST); 284 285 /* enable transmit IRQs */ 286 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG, 287 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]); 288 } 289 290 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream) 291 { 292 mcasp->streams++; 293 294 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 295 mcasp_start_tx(mcasp); 296 else 297 mcasp_start_rx(mcasp); 298 } 299 300 static void mcasp_stop_rx(struct davinci_mcasp *mcasp) 301 { 302 /* disable IRQ sources */ 303 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG, 304 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]); 305 306 /* 307 * In synchronous mode stop the TX clocks if no other stream is 308 * running 309 */ 310 if (mcasp_is_synchronous(mcasp) && !mcasp->streams) { 311 mcasp_set_clk_pdir(mcasp, false); 312 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0); 313 } 314 315 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0); 316 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); 317 318 if (mcasp->rxnumevt) { /* disable FIFO */ 319 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; 320 321 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); 322 } 323 } 324 325 static void mcasp_stop_tx(struct davinci_mcasp *mcasp) 326 { 327 u32 val = 0; 328 329 /* disable IRQ sources */ 330 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG, 331 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]); 332 333 /* 334 * In synchronous mode keep TX clocks running if the capture stream is 335 * still running. 336 */ 337 if (mcasp_is_synchronous(mcasp) && mcasp->streams) 338 val = TXHCLKRST | TXCLKRST | TXFSRST; 339 else 340 mcasp_set_clk_pdir(mcasp, false); 341 342 343 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val); 344 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); 345 346 if (mcasp->txnumevt) { /* disable FIFO */ 347 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; 348 349 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); 350 } 351 352 mcasp_set_axr_pdir(mcasp, false); 353 } 354 355 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream) 356 { 357 mcasp->streams--; 358 359 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 360 mcasp_stop_tx(mcasp); 361 else 362 mcasp_stop_rx(mcasp); 363 } 364 365 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data) 366 { 367 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; 368 struct snd_pcm_substream *substream; 369 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]; 370 u32 handled_mask = 0; 371 u32 stat; 372 373 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG); 374 if (stat & XUNDRN & irq_mask) { 375 dev_warn(mcasp->dev, "Transmit buffer underflow\n"); 376 handled_mask |= XUNDRN; 377 378 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK]; 379 if (substream) 380 snd_pcm_stop_xrun(substream); 381 } 382 383 if (!handled_mask) 384 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n", 385 stat); 386 387 if (stat & XRERR) 388 handled_mask |= XRERR; 389 390 /* Ack the handled event only */ 391 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask); 392 393 return IRQ_RETVAL(handled_mask); 394 } 395 396 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data) 397 { 398 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; 399 struct snd_pcm_substream *substream; 400 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]; 401 u32 handled_mask = 0; 402 u32 stat; 403 404 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG); 405 if (stat & ROVRN & irq_mask) { 406 dev_warn(mcasp->dev, "Receive buffer overflow\n"); 407 handled_mask |= ROVRN; 408 409 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE]; 410 if (substream) 411 snd_pcm_stop_xrun(substream); 412 } 413 414 if (!handled_mask) 415 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n", 416 stat); 417 418 if (stat & XRERR) 419 handled_mask |= XRERR; 420 421 /* Ack the handled event only */ 422 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask); 423 424 return IRQ_RETVAL(handled_mask); 425 } 426 427 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data) 428 { 429 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; 430 irqreturn_t ret = IRQ_NONE; 431 432 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK]) 433 ret = davinci_mcasp_tx_irq_handler(irq, data); 434 435 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE]) 436 ret |= davinci_mcasp_rx_irq_handler(irq, data); 437 438 return ret; 439 } 440 441 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai, 442 unsigned int fmt) 443 { 444 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 445 int ret = 0; 446 u32 data_delay; 447 bool fs_pol_rising; 448 bool inv_fs = false; 449 450 if (!fmt) 451 return 0; 452 453 pm_runtime_get_sync(mcasp->dev); 454 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 455 case SND_SOC_DAIFMT_DSP_A: 456 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); 457 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); 458 /* 1st data bit occur one ACLK cycle after the frame sync */ 459 data_delay = 1; 460 break; 461 case SND_SOC_DAIFMT_DSP_B: 462 case SND_SOC_DAIFMT_AC97: 463 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); 464 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); 465 /* No delay after FS */ 466 data_delay = 0; 467 break; 468 case SND_SOC_DAIFMT_I2S: 469 /* configure a full-word SYNC pulse (LRCLK) */ 470 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); 471 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); 472 /* 1st data bit occur one ACLK cycle after the frame sync */ 473 data_delay = 1; 474 /* FS need to be inverted */ 475 inv_fs = true; 476 break; 477 case SND_SOC_DAIFMT_RIGHT_J: 478 case SND_SOC_DAIFMT_LEFT_J: 479 /* configure a full-word SYNC pulse (LRCLK) */ 480 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); 481 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); 482 /* No delay after FS */ 483 data_delay = 0; 484 break; 485 default: 486 ret = -EINVAL; 487 goto out; 488 } 489 490 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay), 491 FSXDLY(3)); 492 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay), 493 FSRDLY(3)); 494 495 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 496 case SND_SOC_DAIFMT_BP_FP: 497 /* codec is clock and frame slave */ 498 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); 499 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); 500 501 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); 502 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); 503 504 /* BCLK */ 505 set_bit(PIN_BIT_ACLKX, &mcasp->pdir); 506 set_bit(PIN_BIT_ACLKR, &mcasp->pdir); 507 /* Frame Sync */ 508 set_bit(PIN_BIT_AFSX, &mcasp->pdir); 509 set_bit(PIN_BIT_AFSR, &mcasp->pdir); 510 511 mcasp->bclk_master = 1; 512 break; 513 case SND_SOC_DAIFMT_BP_FC: 514 /* codec is clock slave and frame master */ 515 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); 516 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); 517 518 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); 519 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); 520 521 /* BCLK */ 522 set_bit(PIN_BIT_ACLKX, &mcasp->pdir); 523 set_bit(PIN_BIT_ACLKR, &mcasp->pdir); 524 /* Frame Sync */ 525 clear_bit(PIN_BIT_AFSX, &mcasp->pdir); 526 clear_bit(PIN_BIT_AFSR, &mcasp->pdir); 527 528 mcasp->bclk_master = 1; 529 break; 530 case SND_SOC_DAIFMT_BC_FP: 531 /* codec is clock master and frame slave */ 532 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); 533 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); 534 535 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); 536 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); 537 538 /* BCLK */ 539 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir); 540 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir); 541 /* Frame Sync */ 542 set_bit(PIN_BIT_AFSX, &mcasp->pdir); 543 set_bit(PIN_BIT_AFSR, &mcasp->pdir); 544 545 mcasp->bclk_master = 0; 546 break; 547 case SND_SOC_DAIFMT_BC_FC: 548 /* codec is clock and frame master */ 549 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); 550 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); 551 552 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); 553 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); 554 555 /* BCLK */ 556 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir); 557 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir); 558 /* Frame Sync */ 559 clear_bit(PIN_BIT_AFSX, &mcasp->pdir); 560 clear_bit(PIN_BIT_AFSR, &mcasp->pdir); 561 562 mcasp->bclk_master = 0; 563 break; 564 default: 565 ret = -EINVAL; 566 goto out; 567 } 568 569 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 570 case SND_SOC_DAIFMT_IB_NF: 571 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); 572 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); 573 fs_pol_rising = true; 574 break; 575 case SND_SOC_DAIFMT_NB_IF: 576 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); 577 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); 578 fs_pol_rising = false; 579 break; 580 case SND_SOC_DAIFMT_IB_IF: 581 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); 582 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); 583 fs_pol_rising = false; 584 break; 585 case SND_SOC_DAIFMT_NB_NF: 586 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); 587 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); 588 fs_pol_rising = true; 589 break; 590 default: 591 ret = -EINVAL; 592 goto out; 593 } 594 595 if (inv_fs) 596 fs_pol_rising = !fs_pol_rising; 597 598 if (fs_pol_rising) { 599 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL); 600 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL); 601 } else { 602 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL); 603 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL); 604 } 605 606 mcasp->dai_fmt = fmt; 607 out: 608 pm_runtime_put(mcasp->dev); 609 return ret; 610 } 611 612 static int __davinci_mcasp_set_clkdiv(struct davinci_mcasp *mcasp, int div_id, 613 int div, bool explicit) 614 { 615 pm_runtime_get_sync(mcasp->dev); 616 switch (div_id) { 617 case MCASP_CLKDIV_AUXCLK: /* MCLK divider */ 618 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, 619 AHCLKXDIV(div - 1), AHCLKXDIV_MASK); 620 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, 621 AHCLKRDIV(div - 1), AHCLKRDIV_MASK); 622 break; 623 624 case MCASP_CLKDIV_BCLK: /* BCLK divider */ 625 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, 626 ACLKXDIV(div - 1), ACLKXDIV_MASK); 627 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, 628 ACLKRDIV(div - 1), ACLKRDIV_MASK); 629 if (explicit) 630 mcasp->bclk_div = div; 631 break; 632 633 case MCASP_CLKDIV_BCLK_FS_RATIO: 634 /* 635 * BCLK/LRCLK ratio descries how many bit-clock cycles 636 * fit into one frame. The clock ratio is given for a 637 * full period of data (for I2S format both left and 638 * right channels), so it has to be divided by number 639 * of tdm-slots (for I2S - divided by 2). 640 * Instead of storing this ratio, we calculate a new 641 * tdm_slot width by dividing the ratio by the 642 * number of configured tdm slots. 643 */ 644 mcasp->slot_width = div / mcasp->tdm_slots; 645 if (div % mcasp->tdm_slots) 646 dev_warn(mcasp->dev, 647 "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots", 648 __func__, div, mcasp->tdm_slots); 649 break; 650 651 default: 652 return -EINVAL; 653 } 654 655 pm_runtime_put(mcasp->dev); 656 return 0; 657 } 658 659 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, 660 int div) 661 { 662 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); 663 664 return __davinci_mcasp_set_clkdiv(mcasp, div_id, div, 1); 665 } 666 667 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id, 668 unsigned int freq, int dir) 669 { 670 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); 671 672 pm_runtime_get_sync(mcasp->dev); 673 674 if (dir == SND_SOC_CLOCK_IN) { 675 switch (clk_id) { 676 case MCASP_CLK_HCLK_AHCLK: 677 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, 678 AHCLKXE); 679 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, 680 AHCLKRE); 681 clear_bit(PIN_BIT_AHCLKX, &mcasp->pdir); 682 break; 683 case MCASP_CLK_HCLK_AUXCLK: 684 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, 685 AHCLKXE); 686 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, 687 AHCLKRE); 688 set_bit(PIN_BIT_AHCLKX, &mcasp->pdir); 689 break; 690 default: 691 dev_err(mcasp->dev, "Invalid clk id: %d\n", clk_id); 692 goto out; 693 } 694 } else { 695 /* Select AUXCLK as HCLK */ 696 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE); 697 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE); 698 set_bit(PIN_BIT_AHCLKX, &mcasp->pdir); 699 } 700 /* 701 * When AHCLK X/R is selected to be output it means that the HCLK is 702 * the same clock - coming via AUXCLK. 703 */ 704 mcasp->sysclk_freq = freq; 705 out: 706 pm_runtime_put(mcasp->dev); 707 return 0; 708 } 709 710 /* All serializers must have equal number of channels */ 711 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream, 712 int serializers) 713 { 714 struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream]; 715 unsigned int *list = (unsigned int *) cl->list; 716 int slots = mcasp->tdm_slots; 717 int i, count = 0; 718 719 if (mcasp->tdm_mask[stream]) 720 slots = hweight32(mcasp->tdm_mask[stream]); 721 722 for (i = 1; i <= slots; i++) 723 list[count++] = i; 724 725 for (i = 2; i <= serializers; i++) 726 list[count++] = i*slots; 727 728 cl->count = count; 729 730 return 0; 731 } 732 733 static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp) 734 { 735 int rx_serializers = 0, tx_serializers = 0, ret, i; 736 737 for (i = 0; i < mcasp->num_serializer; i++) 738 if (mcasp->serial_dir[i] == TX_MODE) 739 tx_serializers++; 740 else if (mcasp->serial_dir[i] == RX_MODE) 741 rx_serializers++; 742 743 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK, 744 tx_serializers); 745 if (ret) 746 return ret; 747 748 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE, 749 rx_serializers); 750 751 return ret; 752 } 753 754 755 static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai, 756 unsigned int tx_mask, 757 unsigned int rx_mask, 758 int slots, int slot_width) 759 { 760 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); 761 762 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) 763 return 0; 764 765 dev_dbg(mcasp->dev, 766 "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n", 767 __func__, tx_mask, rx_mask, slots, slot_width); 768 769 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) { 770 dev_err(mcasp->dev, 771 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", 772 tx_mask, rx_mask, slots); 773 return -EINVAL; 774 } 775 776 if (slot_width && 777 (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) { 778 dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n", 779 __func__, slot_width); 780 return -EINVAL; 781 } 782 783 mcasp->tdm_slots = slots; 784 mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask; 785 mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask; 786 mcasp->slot_width = slot_width; 787 788 return davinci_mcasp_set_ch_constraints(mcasp); 789 } 790 791 static int davinci_config_channel_size(struct davinci_mcasp *mcasp, 792 int sample_width) 793 { 794 u32 fmt; 795 u32 tx_rotate, rx_rotate, slot_width; 796 u32 mask = (1ULL << sample_width) - 1; 797 798 if (mcasp->slot_width) 799 slot_width = mcasp->slot_width; 800 else if (mcasp->max_format_width) 801 slot_width = mcasp->max_format_width; 802 else 803 slot_width = sample_width; 804 /* 805 * TX rotation: 806 * right aligned formats: rotate w/ slot_width 807 * left aligned formats: rotate w/ sample_width 808 * 809 * RX rotation: 810 * right aligned formats: no rotation needed 811 * left aligned formats: rotate w/ (slot_width - sample_width) 812 */ 813 if ((mcasp->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) == 814 SND_SOC_DAIFMT_RIGHT_J) { 815 tx_rotate = (slot_width / 4) & 0x7; 816 rx_rotate = 0; 817 } else { 818 tx_rotate = (sample_width / 4) & 0x7; 819 rx_rotate = (slot_width - sample_width) / 4; 820 } 821 822 /* mapping of the XSSZ bit-field as described in the datasheet */ 823 fmt = (slot_width >> 1) - 1; 824 825 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) { 826 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt), 827 RXSSZ(0x0F)); 828 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt), 829 TXSSZ(0x0F)); 830 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate), 831 TXROT(7)); 832 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate), 833 RXROT(7)); 834 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask); 835 } else { 836 /* 837 * according to the TRM it should be TXROT=0, this one works: 838 * 16 bit to 23-8 (TXROT=6, rotate 24 bits) 839 * 24 bit to 23-0 (TXROT=0, rotate 0 bits) 840 * 841 * TXROT = 0 only works with 24bit samples 842 */ 843 tx_rotate = (sample_width / 4 + 2) & 0x7; 844 845 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate), 846 TXROT(7)); 847 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(15), 848 TXSSZ(0x0F)); 849 } 850 851 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask); 852 853 return 0; 854 } 855 856 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream, 857 int period_words, int channels) 858 { 859 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream]; 860 int i; 861 u8 tx_ser = 0; 862 u8 rx_ser = 0; 863 u8 slots = mcasp->tdm_slots; 864 u8 max_active_serializers, max_rx_serializers, max_tx_serializers; 865 int active_serializers, numevt; 866 u32 reg; 867 868 /* In DIT mode we only allow maximum of one serializers for now */ 869 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) 870 max_active_serializers = 1; 871 else 872 max_active_serializers = DIV_ROUND_UP(channels, slots); 873 874 /* Default configuration */ 875 if (mcasp->version < MCASP_VERSION_3) 876 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT); 877 878 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 879 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); 880 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); 881 max_tx_serializers = max_active_serializers; 882 max_rx_serializers = 883 mcasp->active_serializers[SNDRV_PCM_STREAM_CAPTURE]; 884 } else { 885 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); 886 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS); 887 max_tx_serializers = 888 mcasp->active_serializers[SNDRV_PCM_STREAM_PLAYBACK]; 889 max_rx_serializers = max_active_serializers; 890 } 891 892 for (i = 0; i < mcasp->num_serializer; i++) { 893 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), 894 mcasp->serial_dir[i]); 895 if (mcasp->serial_dir[i] == TX_MODE && 896 tx_ser < max_tx_serializers) { 897 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), 898 mcasp->dismod, DISMOD_MASK); 899 set_bit(PIN_BIT_AXR(i), &mcasp->pdir); 900 tx_ser++; 901 } else if (mcasp->serial_dir[i] == RX_MODE && 902 rx_ser < max_rx_serializers) { 903 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir); 904 rx_ser++; 905 } else { 906 /* Inactive or unused pin, set it to inactive */ 907 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), 908 SRMOD_INACTIVE, SRMOD_MASK); 909 /* If unused, set DISMOD for the pin */ 910 if (mcasp->serial_dir[i] != INACTIVE_MODE) 911 mcasp_mod_bits(mcasp, 912 DAVINCI_MCASP_XRSRCTL_REG(i), 913 mcasp->dismod, DISMOD_MASK); 914 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir); 915 } 916 } 917 918 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 919 active_serializers = tx_ser; 920 numevt = mcasp->txnumevt; 921 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; 922 } else { 923 active_serializers = rx_ser; 924 numevt = mcasp->rxnumevt; 925 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; 926 } 927 928 if (active_serializers < max_active_serializers) { 929 dev_warn(mcasp->dev, "stream has more channels (%d) than are " 930 "enabled in mcasp (%d)\n", channels, 931 active_serializers * slots); 932 return -EINVAL; 933 } 934 935 /* AFIFO is not in use */ 936 if (!numevt) { 937 /* Configure the burst size for platform drivers */ 938 if (active_serializers > 1) { 939 /* 940 * If more than one serializers are in use we have one 941 * DMA request to provide data for all serializers. 942 * For example if three serializers are enabled the DMA 943 * need to transfer three words per DMA request. 944 */ 945 dma_data->maxburst = active_serializers; 946 } else { 947 dma_data->maxburst = 0; 948 } 949 950 goto out; 951 } 952 953 if (period_words % active_serializers) { 954 dev_err(mcasp->dev, "Invalid combination of period words and " 955 "active serializers: %d, %d\n", period_words, 956 active_serializers); 957 return -EINVAL; 958 } 959 960 /* 961 * Calculate the optimal AFIFO depth for platform side: 962 * The number of words for numevt need to be in steps of active 963 * serializers. 964 */ 965 numevt = (numevt / active_serializers) * active_serializers; 966 967 while (period_words % numevt && numevt > 0) 968 numevt -= active_serializers; 969 if (numevt <= 0) 970 numevt = active_serializers; 971 972 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK); 973 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK); 974 975 /* Configure the burst size for platform drivers */ 976 if (numevt == 1) 977 numevt = 0; 978 dma_data->maxburst = numevt; 979 980 out: 981 mcasp->active_serializers[stream] = active_serializers; 982 983 return 0; 984 } 985 986 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream, 987 int channels) 988 { 989 int i, active_slots; 990 int total_slots; 991 int active_serializers; 992 u32 mask = 0; 993 u32 busel = 0; 994 995 total_slots = mcasp->tdm_slots; 996 997 /* 998 * If more than one serializer is needed, then use them with 999 * all the specified tdm_slots. Otherwise, one serializer can 1000 * cope with the transaction using just as many slots as there 1001 * are channels in the stream. 1002 */ 1003 if (mcasp->tdm_mask[stream]) { 1004 active_slots = hweight32(mcasp->tdm_mask[stream]); 1005 active_serializers = DIV_ROUND_UP(channels, active_slots); 1006 if (active_serializers == 1) 1007 active_slots = channels; 1008 for (i = 0; i < total_slots; i++) { 1009 if ((1 << i) & mcasp->tdm_mask[stream]) { 1010 mask |= (1 << i); 1011 if (--active_slots <= 0) 1012 break; 1013 } 1014 } 1015 } else { 1016 active_serializers = DIV_ROUND_UP(channels, total_slots); 1017 if (active_serializers == 1) 1018 active_slots = channels; 1019 else 1020 active_slots = total_slots; 1021 1022 for (i = 0; i < active_slots; i++) 1023 mask |= (1 << i); 1024 } 1025 1026 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC); 1027 1028 if (!mcasp->dat_port) 1029 busel = TXSEL; 1030 1031 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1032 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask); 1033 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD); 1034 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, 1035 FSXMOD(total_slots), FSXMOD(0x1FF)); 1036 } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { 1037 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask); 1038 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD); 1039 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, 1040 FSRMOD(total_slots), FSRMOD(0x1FF)); 1041 /* 1042 * If McASP is set to be TX/RX synchronous and the playback is 1043 * not running already we need to configure the TX slots in 1044 * order to have correct FSX on the bus 1045 */ 1046 if (mcasp_is_synchronous(mcasp) && !mcasp->channels) 1047 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, 1048 FSXMOD(total_slots), FSXMOD(0x1FF)); 1049 } 1050 1051 return 0; 1052 } 1053 1054 /* S/PDIF */ 1055 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp, 1056 unsigned int rate) 1057 { 1058 u8 *cs_bytes = (u8 *)&mcasp->iec958_status; 1059 1060 if (!mcasp->dat_port) 1061 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSEL); 1062 else 1063 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSEL); 1064 1065 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */ 1066 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180)); 1067 1068 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, 0xFFFF); 1069 1070 /* Set the TX tdm : for all the slots */ 1071 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF); 1072 1073 /* Set the TX clock controls : div = 1 and internal */ 1074 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC); 1075 1076 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); 1077 1078 /* Set S/PDIF channel status bits */ 1079 cs_bytes[3] &= ~IEC958_AES3_CON_FS; 1080 switch (rate) { 1081 case 22050: 1082 cs_bytes[3] |= IEC958_AES3_CON_FS_22050; 1083 break; 1084 case 24000: 1085 cs_bytes[3] |= IEC958_AES3_CON_FS_24000; 1086 break; 1087 case 32000: 1088 cs_bytes[3] |= IEC958_AES3_CON_FS_32000; 1089 break; 1090 case 44100: 1091 cs_bytes[3] |= IEC958_AES3_CON_FS_44100; 1092 break; 1093 case 48000: 1094 cs_bytes[3] |= IEC958_AES3_CON_FS_48000; 1095 break; 1096 case 88200: 1097 cs_bytes[3] |= IEC958_AES3_CON_FS_88200; 1098 break; 1099 case 96000: 1100 cs_bytes[3] |= IEC958_AES3_CON_FS_96000; 1101 break; 1102 case 176400: 1103 cs_bytes[3] |= IEC958_AES3_CON_FS_176400; 1104 break; 1105 case 192000: 1106 cs_bytes[3] |= IEC958_AES3_CON_FS_192000; 1107 break; 1108 default: 1109 dev_err(mcasp->dev, "unsupported sampling rate: %d\n", rate); 1110 return -EINVAL; 1111 } 1112 1113 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, mcasp->iec958_status); 1114 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, mcasp->iec958_status); 1115 1116 /* Enable the DIT */ 1117 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN); 1118 1119 return 0; 1120 } 1121 1122 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp, 1123 unsigned int sysclk_freq, 1124 unsigned int bclk_freq, bool set) 1125 { 1126 u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG); 1127 int div = sysclk_freq / bclk_freq; 1128 int rem = sysclk_freq % bclk_freq; 1129 int error_ppm; 1130 int aux_div = 1; 1131 1132 if (div > (ACLKXDIV_MASK + 1)) { 1133 if (reg & AHCLKXE) { 1134 aux_div = div / (ACLKXDIV_MASK + 1); 1135 if (div % (ACLKXDIV_MASK + 1)) 1136 aux_div++; 1137 1138 sysclk_freq /= aux_div; 1139 div = sysclk_freq / bclk_freq; 1140 rem = sysclk_freq % bclk_freq; 1141 } else if (set) { 1142 dev_warn(mcasp->dev, "Too fast reference clock (%u)\n", 1143 sysclk_freq); 1144 } 1145 } 1146 1147 if (rem != 0) { 1148 if (div == 0 || 1149 ((sysclk_freq / div) - bclk_freq) > 1150 (bclk_freq - (sysclk_freq / (div+1)))) { 1151 div++; 1152 rem = rem - bclk_freq; 1153 } 1154 } 1155 error_ppm = (div*1000000 + (int)div64_long(1000000LL*rem, 1156 (int)bclk_freq)) / div - 1000000; 1157 1158 if (set) { 1159 if (error_ppm) 1160 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n", 1161 error_ppm); 1162 1163 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_BCLK, div, 0); 1164 if (reg & AHCLKXE) 1165 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_AUXCLK, 1166 aux_div, 0); 1167 } 1168 1169 return error_ppm; 1170 } 1171 1172 static inline u32 davinci_mcasp_tx_delay(struct davinci_mcasp *mcasp) 1173 { 1174 if (!mcasp->txnumevt) 1175 return 0; 1176 1177 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_WFIFOSTS_OFFSET); 1178 } 1179 1180 static inline u32 davinci_mcasp_rx_delay(struct davinci_mcasp *mcasp) 1181 { 1182 if (!mcasp->rxnumevt) 1183 return 0; 1184 1185 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_RFIFOSTS_OFFSET); 1186 } 1187 1188 static snd_pcm_sframes_t davinci_mcasp_delay( 1189 struct snd_pcm_substream *substream, 1190 struct snd_soc_dai *cpu_dai) 1191 { 1192 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1193 u32 fifo_use; 1194 1195 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1196 fifo_use = davinci_mcasp_tx_delay(mcasp); 1197 else 1198 fifo_use = davinci_mcasp_rx_delay(mcasp); 1199 1200 /* 1201 * Divide the used locations with the channel count to get the 1202 * FIFO usage in samples (don't care about partial samples in the 1203 * buffer). 1204 */ 1205 return fifo_use / substream->runtime->channels; 1206 } 1207 1208 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, 1209 struct snd_pcm_hw_params *params, 1210 struct snd_soc_dai *cpu_dai) 1211 { 1212 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1213 int word_length; 1214 int channels = params_channels(params); 1215 int period_size = params_period_size(params); 1216 int ret; 1217 1218 switch (params_format(params)) { 1219 case SNDRV_PCM_FORMAT_U8: 1220 case SNDRV_PCM_FORMAT_S8: 1221 word_length = 8; 1222 break; 1223 1224 case SNDRV_PCM_FORMAT_U16_LE: 1225 case SNDRV_PCM_FORMAT_S16_LE: 1226 word_length = 16; 1227 break; 1228 1229 case SNDRV_PCM_FORMAT_U24_3LE: 1230 case SNDRV_PCM_FORMAT_S24_3LE: 1231 word_length = 24; 1232 break; 1233 1234 case SNDRV_PCM_FORMAT_U24_LE: 1235 case SNDRV_PCM_FORMAT_S24_LE: 1236 word_length = 24; 1237 break; 1238 1239 case SNDRV_PCM_FORMAT_U32_LE: 1240 case SNDRV_PCM_FORMAT_S32_LE: 1241 word_length = 32; 1242 break; 1243 1244 default: 1245 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format"); 1246 return -EINVAL; 1247 } 1248 1249 ret = davinci_mcasp_set_dai_fmt(cpu_dai, mcasp->dai_fmt); 1250 if (ret) 1251 return ret; 1252 1253 /* 1254 * If mcasp is BCLK master, and a BCLK divider was not provided by 1255 * the machine driver, we need to calculate the ratio. 1256 */ 1257 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) { 1258 int slots = mcasp->tdm_slots; 1259 int rate = params_rate(params); 1260 int sbits = params_width(params); 1261 unsigned int bclk_target; 1262 1263 if (mcasp->slot_width) 1264 sbits = mcasp->slot_width; 1265 1266 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) 1267 bclk_target = rate * sbits * slots; 1268 else 1269 bclk_target = rate * 128; 1270 1271 davinci_mcasp_calc_clk_div(mcasp, mcasp->sysclk_freq, 1272 bclk_target, true); 1273 } 1274 1275 ret = mcasp_common_hw_param(mcasp, substream->stream, 1276 period_size * channels, channels); 1277 if (ret) 1278 return ret; 1279 1280 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) 1281 ret = mcasp_dit_hw_param(mcasp, params_rate(params)); 1282 else 1283 ret = mcasp_i2s_hw_param(mcasp, substream->stream, 1284 channels); 1285 1286 if (ret) 1287 return ret; 1288 1289 davinci_config_channel_size(mcasp, word_length); 1290 1291 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { 1292 mcasp->channels = channels; 1293 if (!mcasp->max_format_width) 1294 mcasp->max_format_width = word_length; 1295 } 1296 1297 return 0; 1298 } 1299 1300 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream, 1301 int cmd, struct snd_soc_dai *cpu_dai) 1302 { 1303 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1304 int ret = 0; 1305 1306 switch (cmd) { 1307 case SNDRV_PCM_TRIGGER_RESUME: 1308 case SNDRV_PCM_TRIGGER_START: 1309 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1310 davinci_mcasp_start(mcasp, substream->stream); 1311 break; 1312 case SNDRV_PCM_TRIGGER_SUSPEND: 1313 case SNDRV_PCM_TRIGGER_STOP: 1314 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1315 davinci_mcasp_stop(mcasp, substream->stream); 1316 break; 1317 1318 default: 1319 ret = -EINVAL; 1320 } 1321 1322 return ret; 1323 } 1324 1325 static int davinci_mcasp_hw_rule_slot_width(struct snd_pcm_hw_params *params, 1326 struct snd_pcm_hw_rule *rule) 1327 { 1328 struct davinci_mcasp_ruledata *rd = rule->private; 1329 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1330 struct snd_mask nfmt; 1331 int slot_width; 1332 snd_pcm_format_t i; 1333 1334 snd_mask_none(&nfmt); 1335 slot_width = rd->mcasp->slot_width; 1336 1337 pcm_for_each_format(i) { 1338 if (snd_mask_test_format(fmt, i)) { 1339 if (snd_pcm_format_width(i) <= slot_width) { 1340 snd_mask_set_format(&nfmt, i); 1341 } 1342 } 1343 } 1344 1345 return snd_mask_refine(fmt, &nfmt); 1346 } 1347 1348 static int davinci_mcasp_hw_rule_format_width(struct snd_pcm_hw_params *params, 1349 struct snd_pcm_hw_rule *rule) 1350 { 1351 struct davinci_mcasp_ruledata *rd = rule->private; 1352 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1353 struct snd_mask nfmt; 1354 int format_width; 1355 snd_pcm_format_t i; 1356 1357 snd_mask_none(&nfmt); 1358 format_width = rd->mcasp->max_format_width; 1359 1360 pcm_for_each_format(i) { 1361 if (snd_mask_test_format(fmt, i)) { 1362 if (snd_pcm_format_width(i) == format_width) { 1363 snd_mask_set_format(&nfmt, i); 1364 } 1365 } 1366 } 1367 1368 return snd_mask_refine(fmt, &nfmt); 1369 } 1370 1371 static const unsigned int davinci_mcasp_dai_rates[] = { 1372 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 1373 88200, 96000, 176400, 192000, 1374 }; 1375 1376 #define DAVINCI_MAX_RATE_ERROR_PPM 1000 1377 1378 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params, 1379 struct snd_pcm_hw_rule *rule) 1380 { 1381 struct davinci_mcasp_ruledata *rd = rule->private; 1382 struct snd_interval *ri = 1383 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 1384 int sbits = params_width(params); 1385 int slots = rd->mcasp->tdm_slots; 1386 struct snd_interval range; 1387 int i; 1388 1389 if (rd->mcasp->slot_width) 1390 sbits = rd->mcasp->slot_width; 1391 1392 snd_interval_any(&range); 1393 range.empty = 1; 1394 1395 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) { 1396 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) { 1397 uint bclk_freq = sbits * slots * 1398 davinci_mcasp_dai_rates[i]; 1399 unsigned int sysclk_freq; 1400 int ppm; 1401 1402 if (rd->mcasp->auxclk_fs_ratio) 1403 sysclk_freq = davinci_mcasp_dai_rates[i] * 1404 rd->mcasp->auxclk_fs_ratio; 1405 else 1406 sysclk_freq = rd->mcasp->sysclk_freq; 1407 1408 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq, 1409 bclk_freq, false); 1410 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) { 1411 if (range.empty) { 1412 range.min = davinci_mcasp_dai_rates[i]; 1413 range.empty = 0; 1414 } 1415 range.max = davinci_mcasp_dai_rates[i]; 1416 } 1417 } 1418 } 1419 1420 dev_dbg(rd->mcasp->dev, 1421 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n", 1422 ri->min, ri->max, range.min, range.max, sbits, slots); 1423 1424 return snd_interval_refine(hw_param_interval(params, rule->var), 1425 &range); 1426 } 1427 1428 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params, 1429 struct snd_pcm_hw_rule *rule) 1430 { 1431 struct davinci_mcasp_ruledata *rd = rule->private; 1432 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1433 struct snd_mask nfmt; 1434 int rate = params_rate(params); 1435 int slots = rd->mcasp->tdm_slots; 1436 int count = 0; 1437 snd_pcm_format_t i; 1438 1439 snd_mask_none(&nfmt); 1440 1441 pcm_for_each_format(i) { 1442 if (snd_mask_test_format(fmt, i)) { 1443 uint sbits = snd_pcm_format_width(i); 1444 unsigned int sysclk_freq; 1445 int ppm; 1446 1447 if (rd->mcasp->auxclk_fs_ratio) 1448 sysclk_freq = rate * 1449 rd->mcasp->auxclk_fs_ratio; 1450 else 1451 sysclk_freq = rd->mcasp->sysclk_freq; 1452 1453 if (rd->mcasp->slot_width) 1454 sbits = rd->mcasp->slot_width; 1455 1456 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq, 1457 sbits * slots * rate, 1458 false); 1459 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) { 1460 snd_mask_set_format(&nfmt, i); 1461 count++; 1462 } 1463 } 1464 } 1465 dev_dbg(rd->mcasp->dev, 1466 "%d possible sample format for %d Hz and %d tdm slots\n", 1467 count, rate, slots); 1468 1469 return snd_mask_refine(fmt, &nfmt); 1470 } 1471 1472 static int davinci_mcasp_hw_rule_min_periodsize( 1473 struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) 1474 { 1475 struct snd_interval *period_size = hw_param_interval(params, 1476 SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1477 u8 numevt = *((u8 *)rule->private); 1478 struct snd_interval frames; 1479 1480 snd_interval_any(&frames); 1481 frames.min = numevt; 1482 frames.integer = 1; 1483 1484 return snd_interval_refine(period_size, &frames); 1485 } 1486 1487 static int davinci_mcasp_startup(struct snd_pcm_substream *substream, 1488 struct snd_soc_dai *cpu_dai) 1489 { 1490 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1491 struct davinci_mcasp_ruledata *ruledata = 1492 &mcasp->ruledata[substream->stream]; 1493 u32 max_channels = 0; 1494 int i, dir, ret; 1495 int tdm_slots = mcasp->tdm_slots; 1496 u8 *numevt; 1497 1498 /* Do not allow more then one stream per direction */ 1499 if (mcasp->substreams[substream->stream]) 1500 return -EBUSY; 1501 1502 mcasp->substreams[substream->stream] = substream; 1503 1504 if (mcasp->tdm_mask[substream->stream]) 1505 tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]); 1506 1507 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) 1508 return 0; 1509 1510 /* 1511 * Limit the maximum allowed channels for the first stream: 1512 * number of serializers for the direction * tdm slots per serializer 1513 */ 1514 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1515 dir = TX_MODE; 1516 else 1517 dir = RX_MODE; 1518 1519 for (i = 0; i < mcasp->num_serializer; i++) { 1520 if (mcasp->serial_dir[i] == dir) 1521 max_channels++; 1522 } 1523 ruledata->serializers = max_channels; 1524 ruledata->mcasp = mcasp; 1525 max_channels *= tdm_slots; 1526 /* 1527 * If the already active stream has less channels than the calculated 1528 * limit based on the seirializers * tdm_slots, and only one serializer 1529 * is in use we need to use that as a constraint for the second stream. 1530 * Otherwise (first stream or less allowed channels or more than one 1531 * serializer in use) we use the calculated constraint. 1532 */ 1533 if (mcasp->channels && mcasp->channels < max_channels && 1534 ruledata->serializers == 1) 1535 max_channels = mcasp->channels; 1536 /* 1537 * But we can always allow channels upto the amount of 1538 * the available tdm_slots. 1539 */ 1540 if (max_channels < tdm_slots) 1541 max_channels = tdm_slots; 1542 1543 snd_pcm_hw_constraint_minmax(substream->runtime, 1544 SNDRV_PCM_HW_PARAM_CHANNELS, 1545 0, max_channels); 1546 1547 snd_pcm_hw_constraint_list(substream->runtime, 1548 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1549 &mcasp->chconstr[substream->stream]); 1550 1551 if (mcasp->max_format_width) { 1552 /* 1553 * Only allow formats which require same amount of bits on the 1554 * bus as the currently running stream 1555 */ 1556 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 1557 SNDRV_PCM_HW_PARAM_FORMAT, 1558 davinci_mcasp_hw_rule_format_width, 1559 ruledata, 1560 SNDRV_PCM_HW_PARAM_FORMAT, -1); 1561 if (ret) 1562 return ret; 1563 } 1564 else if (mcasp->slot_width) { 1565 /* Only allow formats require <= slot_width bits on the bus */ 1566 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 1567 SNDRV_PCM_HW_PARAM_FORMAT, 1568 davinci_mcasp_hw_rule_slot_width, 1569 ruledata, 1570 SNDRV_PCM_HW_PARAM_FORMAT, -1); 1571 if (ret) 1572 return ret; 1573 } 1574 1575 /* 1576 * If we rely on implicit BCLK divider setting we should 1577 * set constraints based on what we can provide. 1578 */ 1579 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) { 1580 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 1581 SNDRV_PCM_HW_PARAM_RATE, 1582 davinci_mcasp_hw_rule_rate, 1583 ruledata, 1584 SNDRV_PCM_HW_PARAM_FORMAT, -1); 1585 if (ret) 1586 return ret; 1587 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 1588 SNDRV_PCM_HW_PARAM_FORMAT, 1589 davinci_mcasp_hw_rule_format, 1590 ruledata, 1591 SNDRV_PCM_HW_PARAM_RATE, -1); 1592 if (ret) 1593 return ret; 1594 } 1595 1596 numevt = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 1597 &mcasp->txnumevt : 1598 &mcasp->rxnumevt; 1599 snd_pcm_hw_rule_add(substream->runtime, 0, 1600 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1601 davinci_mcasp_hw_rule_min_periodsize, numevt, 1602 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1603 1604 return 0; 1605 } 1606 1607 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream, 1608 struct snd_soc_dai *cpu_dai) 1609 { 1610 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1611 1612 mcasp->substreams[substream->stream] = NULL; 1613 mcasp->active_serializers[substream->stream] = 0; 1614 1615 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) 1616 return; 1617 1618 if (!snd_soc_dai_active(cpu_dai)) { 1619 mcasp->channels = 0; 1620 mcasp->max_format_width = 0; 1621 } 1622 } 1623 1624 static int davinci_mcasp_iec958_info(struct snd_kcontrol *kcontrol, 1625 struct snd_ctl_elem_info *uinfo) 1626 { 1627 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 1628 uinfo->count = 1; 1629 1630 return 0; 1631 } 1632 1633 static int davinci_mcasp_iec958_get(struct snd_kcontrol *kcontrol, 1634 struct snd_ctl_elem_value *uctl) 1635 { 1636 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol); 1637 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1638 1639 memcpy(uctl->value.iec958.status, &mcasp->iec958_status, 1640 sizeof(mcasp->iec958_status)); 1641 1642 return 0; 1643 } 1644 1645 static int davinci_mcasp_iec958_put(struct snd_kcontrol *kcontrol, 1646 struct snd_ctl_elem_value *uctl) 1647 { 1648 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol); 1649 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1650 1651 memcpy(&mcasp->iec958_status, uctl->value.iec958.status, 1652 sizeof(mcasp->iec958_status)); 1653 1654 return 0; 1655 } 1656 1657 static int davinci_mcasp_iec958_con_mask_get(struct snd_kcontrol *kcontrol, 1658 struct snd_ctl_elem_value *ucontrol) 1659 { 1660 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol); 1661 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); 1662 1663 memset(ucontrol->value.iec958.status, 0xff, sizeof(mcasp->iec958_status)); 1664 return 0; 1665 } 1666 1667 static const struct snd_kcontrol_new davinci_mcasp_iec958_ctls[] = { 1668 { 1669 .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE | 1670 SNDRV_CTL_ELEM_ACCESS_VOLATILE), 1671 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 1672 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), 1673 .info = davinci_mcasp_iec958_info, 1674 .get = davinci_mcasp_iec958_get, 1675 .put = davinci_mcasp_iec958_put, 1676 }, { 1677 .access = SNDRV_CTL_ELEM_ACCESS_READ, 1678 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1679 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK), 1680 .info = davinci_mcasp_iec958_info, 1681 .get = davinci_mcasp_iec958_con_mask_get, 1682 }, 1683 }; 1684 1685 static void davinci_mcasp_init_iec958_status(struct davinci_mcasp *mcasp) 1686 { 1687 unsigned char *cs = (u8 *)&mcasp->iec958_status; 1688 1689 cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE; 1690 cs[1] = IEC958_AES1_CON_PCM_CODER; 1691 cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC | IEC958_AES2_CON_CHANNEL_UNSPEC; 1692 cs[3] = IEC958_AES3_CON_CLOCK_1000PPM; 1693 } 1694 1695 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai) 1696 { 1697 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); 1698 int stream; 1699 1700 for_each_pcm_streams(stream) 1701 snd_soc_dai_dma_data_set(dai, stream, &mcasp->dma_data[stream]); 1702 1703 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) { 1704 davinci_mcasp_init_iec958_status(mcasp); 1705 snd_soc_add_dai_controls(dai, davinci_mcasp_iec958_ctls, 1706 ARRAY_SIZE(davinci_mcasp_iec958_ctls)); 1707 } 1708 1709 return 0; 1710 } 1711 1712 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = { 1713 .probe = davinci_mcasp_dai_probe, 1714 .startup = davinci_mcasp_startup, 1715 .shutdown = davinci_mcasp_shutdown, 1716 .trigger = davinci_mcasp_trigger, 1717 .delay = davinci_mcasp_delay, 1718 .hw_params = davinci_mcasp_hw_params, 1719 .set_fmt = davinci_mcasp_set_dai_fmt, 1720 .set_clkdiv = davinci_mcasp_set_clkdiv, 1721 .set_sysclk = davinci_mcasp_set_sysclk, 1722 .set_tdm_slot = davinci_mcasp_set_tdm_slot, 1723 }; 1724 1725 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000 1726 1727 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \ 1728 SNDRV_PCM_FMTBIT_U8 | \ 1729 SNDRV_PCM_FMTBIT_S16_LE | \ 1730 SNDRV_PCM_FMTBIT_U16_LE | \ 1731 SNDRV_PCM_FMTBIT_S24_LE | \ 1732 SNDRV_PCM_FMTBIT_U24_LE | \ 1733 SNDRV_PCM_FMTBIT_S24_3LE | \ 1734 SNDRV_PCM_FMTBIT_U24_3LE | \ 1735 SNDRV_PCM_FMTBIT_S32_LE | \ 1736 SNDRV_PCM_FMTBIT_U32_LE) 1737 1738 static struct snd_soc_dai_driver davinci_mcasp_dai[] = { 1739 { 1740 .name = "davinci-mcasp.0", 1741 .playback = { 1742 .stream_name = "IIS Playback", 1743 .channels_min = 1, 1744 .channels_max = 32 * 16, 1745 .rates = DAVINCI_MCASP_RATES, 1746 .formats = DAVINCI_MCASP_PCM_FMTS, 1747 }, 1748 .capture = { 1749 .stream_name = "IIS Capture", 1750 .channels_min = 1, 1751 .channels_max = 32 * 16, 1752 .rates = DAVINCI_MCASP_RATES, 1753 .formats = DAVINCI_MCASP_PCM_FMTS, 1754 }, 1755 .ops = &davinci_mcasp_dai_ops, 1756 1757 .symmetric_rate = 1, 1758 }, 1759 { 1760 .name = "davinci-mcasp.1", 1761 .playback = { 1762 .stream_name = "DIT Playback", 1763 .channels_min = 1, 1764 .channels_max = 384, 1765 .rates = DAVINCI_MCASP_RATES, 1766 .formats = SNDRV_PCM_FMTBIT_S16_LE | 1767 SNDRV_PCM_FMTBIT_S24_LE, 1768 }, 1769 .ops = &davinci_mcasp_dai_ops, 1770 }, 1771 1772 }; 1773 1774 static const struct snd_soc_component_driver davinci_mcasp_component = { 1775 .name = "davinci-mcasp", 1776 .legacy_dai_naming = 1, 1777 }; 1778 1779 /* Some HW specific values and defaults. The rest is filled in from DT. */ 1780 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = { 1781 .tx_dma_offset = 0x400, 1782 .rx_dma_offset = 0x400, 1783 .version = MCASP_VERSION_1, 1784 }; 1785 1786 static struct davinci_mcasp_pdata da830_mcasp_pdata = { 1787 .tx_dma_offset = 0x2000, 1788 .rx_dma_offset = 0x2000, 1789 .version = MCASP_VERSION_2, 1790 }; 1791 1792 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = { 1793 .tx_dma_offset = 0, 1794 .rx_dma_offset = 0, 1795 .version = MCASP_VERSION_3, 1796 }; 1797 1798 static struct davinci_mcasp_pdata dra7_mcasp_pdata = { 1799 /* The CFG port offset will be calculated if it is needed */ 1800 .tx_dma_offset = 0, 1801 .rx_dma_offset = 0, 1802 .version = MCASP_VERSION_4, 1803 }; 1804 1805 static struct davinci_mcasp_pdata omap_mcasp_pdata = { 1806 .tx_dma_offset = 0x200, 1807 .rx_dma_offset = 0, 1808 .version = MCASP_VERSION_OMAP, 1809 }; 1810 1811 static const struct of_device_id mcasp_dt_ids[] = { 1812 { 1813 .compatible = "ti,dm646x-mcasp-audio", 1814 .data = &dm646x_mcasp_pdata, 1815 }, 1816 { 1817 .compatible = "ti,da830-mcasp-audio", 1818 .data = &da830_mcasp_pdata, 1819 }, 1820 { 1821 .compatible = "ti,am33xx-mcasp-audio", 1822 .data = &am33xx_mcasp_pdata, 1823 }, 1824 { 1825 .compatible = "ti,dra7-mcasp-audio", 1826 .data = &dra7_mcasp_pdata, 1827 }, 1828 { 1829 .compatible = "ti,omap4-mcasp-audio", 1830 .data = &omap_mcasp_pdata, 1831 }, 1832 { /* sentinel */ } 1833 }; 1834 MODULE_DEVICE_TABLE(of, mcasp_dt_ids); 1835 1836 static int mcasp_reparent_fck(struct platform_device *pdev) 1837 { 1838 struct device_node *node = pdev->dev.of_node; 1839 struct clk *gfclk, *parent_clk; 1840 const char *parent_name; 1841 int ret; 1842 1843 if (!node) 1844 return 0; 1845 1846 parent_name = of_get_property(node, "fck_parent", NULL); 1847 if (!parent_name) 1848 return 0; 1849 1850 dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n"); 1851 1852 gfclk = clk_get(&pdev->dev, "fck"); 1853 if (IS_ERR(gfclk)) { 1854 dev_err(&pdev->dev, "failed to get fck\n"); 1855 return PTR_ERR(gfclk); 1856 } 1857 1858 parent_clk = clk_get(NULL, parent_name); 1859 if (IS_ERR(parent_clk)) { 1860 dev_err(&pdev->dev, "failed to get parent clock\n"); 1861 ret = PTR_ERR(parent_clk); 1862 goto err1; 1863 } 1864 1865 ret = clk_set_parent(gfclk, parent_clk); 1866 if (ret) { 1867 dev_err(&pdev->dev, "failed to reparent fck\n"); 1868 goto err2; 1869 } 1870 1871 err2: 1872 clk_put(parent_clk); 1873 err1: 1874 clk_put(gfclk); 1875 return ret; 1876 } 1877 1878 static bool davinci_mcasp_have_gpiochip(struct davinci_mcasp *mcasp) 1879 { 1880 #ifdef CONFIG_OF_GPIO 1881 return of_property_read_bool(mcasp->dev->of_node, "gpio-controller"); 1882 #else 1883 return false; 1884 #endif 1885 } 1886 1887 static int davinci_mcasp_get_config(struct davinci_mcasp *mcasp, 1888 struct platform_device *pdev) 1889 { 1890 const struct of_device_id *match = of_match_device(mcasp_dt_ids, &pdev->dev); 1891 struct device_node *np = pdev->dev.of_node; 1892 struct davinci_mcasp_pdata *pdata = NULL; 1893 const u32 *of_serial_dir32; 1894 u32 val; 1895 int i; 1896 1897 if (pdev->dev.platform_data) { 1898 pdata = pdev->dev.platform_data; 1899 pdata->dismod = DISMOD_LOW; 1900 goto out; 1901 } else if (match) { 1902 pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata), 1903 GFP_KERNEL); 1904 if (!pdata) 1905 return -ENOMEM; 1906 } else { 1907 dev_err(&pdev->dev, "No compatible match found\n"); 1908 return -EINVAL; 1909 } 1910 1911 if (of_property_read_u32(np, "op-mode", &val) == 0) { 1912 pdata->op_mode = val; 1913 } else { 1914 mcasp->missing_audio_param = true; 1915 goto out; 1916 } 1917 1918 if (of_property_read_u32(np, "tdm-slots", &val) == 0) { 1919 if (val < 2 || val > 32) { 1920 dev_err(&pdev->dev, "tdm-slots must be in rage [2-32]\n"); 1921 return -EINVAL; 1922 } 1923 1924 pdata->tdm_slots = val; 1925 } else if (pdata->op_mode == DAVINCI_MCASP_IIS_MODE) { 1926 mcasp->missing_audio_param = true; 1927 goto out; 1928 } 1929 1930 of_serial_dir32 = of_get_property(np, "serial-dir", &val); 1931 val /= sizeof(u32); 1932 if (of_serial_dir32) { 1933 u8 *of_serial_dir = devm_kzalloc(&pdev->dev, 1934 (sizeof(*of_serial_dir) * val), 1935 GFP_KERNEL); 1936 if (!of_serial_dir) 1937 return -ENOMEM; 1938 1939 for (i = 0; i < val; i++) 1940 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]); 1941 1942 pdata->num_serializer = val; 1943 pdata->serial_dir = of_serial_dir; 1944 } else { 1945 mcasp->missing_audio_param = true; 1946 goto out; 1947 } 1948 1949 if (of_property_read_u32(np, "tx-num-evt", &val) == 0) 1950 pdata->txnumevt = val; 1951 1952 if (of_property_read_u32(np, "rx-num-evt", &val) == 0) 1953 pdata->rxnumevt = val; 1954 1955 if (of_property_read_u32(np, "auxclk-fs-ratio", &val) == 0) 1956 mcasp->auxclk_fs_ratio = val; 1957 1958 if (of_property_read_u32(np, "dismod", &val) == 0) { 1959 if (val == 0 || val == 2 || val == 3) { 1960 pdata->dismod = DISMOD_VAL(val); 1961 } else { 1962 dev_warn(&pdev->dev, "Invalid dismod value: %u\n", val); 1963 pdata->dismod = DISMOD_LOW; 1964 } 1965 } else { 1966 pdata->dismod = DISMOD_LOW; 1967 } 1968 1969 out: 1970 mcasp->pdata = pdata; 1971 1972 if (mcasp->missing_audio_param) { 1973 if (davinci_mcasp_have_gpiochip(mcasp)) { 1974 dev_dbg(&pdev->dev, "Missing DT parameter(s) for audio\n"); 1975 return 0; 1976 } 1977 1978 dev_err(&pdev->dev, "Insufficient DT parameter(s)\n"); 1979 return -ENODEV; 1980 } 1981 1982 mcasp->op_mode = pdata->op_mode; 1983 /* sanity check for tdm slots parameter */ 1984 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { 1985 if (pdata->tdm_slots < 2) { 1986 dev_warn(&pdev->dev, "invalid tdm slots: %d\n", 1987 pdata->tdm_slots); 1988 mcasp->tdm_slots = 2; 1989 } else if (pdata->tdm_slots > 32) { 1990 dev_warn(&pdev->dev, "invalid tdm slots: %d\n", 1991 pdata->tdm_slots); 1992 mcasp->tdm_slots = 32; 1993 } else { 1994 mcasp->tdm_slots = pdata->tdm_slots; 1995 } 1996 } else { 1997 mcasp->tdm_slots = 32; 1998 } 1999 2000 mcasp->num_serializer = pdata->num_serializer; 2001 #ifdef CONFIG_PM 2002 mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev, 2003 mcasp->num_serializer, sizeof(u32), 2004 GFP_KERNEL); 2005 if (!mcasp->context.xrsr_regs) 2006 return -ENOMEM; 2007 #endif 2008 mcasp->serial_dir = pdata->serial_dir; 2009 mcasp->version = pdata->version; 2010 mcasp->txnumevt = pdata->txnumevt; 2011 mcasp->rxnumevt = pdata->rxnumevt; 2012 mcasp->dismod = pdata->dismod; 2013 2014 return 0; 2015 } 2016 2017 enum { 2018 PCM_EDMA, 2019 PCM_SDMA, 2020 PCM_UDMA, 2021 }; 2022 static const char *sdma_prefix = "ti,omap"; 2023 2024 static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp) 2025 { 2026 struct dma_chan *chan; 2027 const char *tmp; 2028 int ret = PCM_EDMA; 2029 2030 if (!mcasp->dev->of_node) 2031 return PCM_EDMA; 2032 2033 tmp = mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data; 2034 chan = dma_request_chan(mcasp->dev, tmp); 2035 if (IS_ERR(chan)) 2036 return dev_err_probe(mcasp->dev, PTR_ERR(chan), 2037 "Can't verify DMA configuration\n"); 2038 if (WARN_ON(!chan->device || !chan->device->dev)) { 2039 dma_release_channel(chan); 2040 return -EINVAL; 2041 } 2042 2043 if (chan->device->dev->of_node) 2044 ret = of_property_read_string(chan->device->dev->of_node, 2045 "compatible", &tmp); 2046 else 2047 dev_dbg(mcasp->dev, "DMA controller has no of-node\n"); 2048 2049 dma_release_channel(chan); 2050 if (ret) 2051 return ret; 2052 2053 dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp); 2054 if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix))) 2055 return PCM_SDMA; 2056 else if (strstr(tmp, "udmap")) 2057 return PCM_UDMA; 2058 else if (strstr(tmp, "bcdma")) 2059 return PCM_UDMA; 2060 2061 return PCM_EDMA; 2062 } 2063 2064 static u32 davinci_mcasp_txdma_offset(struct davinci_mcasp_pdata *pdata) 2065 { 2066 int i; 2067 u32 offset = 0; 2068 2069 if (pdata->version != MCASP_VERSION_4) 2070 return pdata->tx_dma_offset; 2071 2072 for (i = 0; i < pdata->num_serializer; i++) { 2073 if (pdata->serial_dir[i] == TX_MODE) { 2074 if (!offset) { 2075 offset = DAVINCI_MCASP_TXBUF_REG(i); 2076 } else { 2077 pr_err("%s: Only one serializer allowed!\n", 2078 __func__); 2079 break; 2080 } 2081 } 2082 } 2083 2084 return offset; 2085 } 2086 2087 static u32 davinci_mcasp_rxdma_offset(struct davinci_mcasp_pdata *pdata) 2088 { 2089 int i; 2090 u32 offset = 0; 2091 2092 if (pdata->version != MCASP_VERSION_4) 2093 return pdata->rx_dma_offset; 2094 2095 for (i = 0; i < pdata->num_serializer; i++) { 2096 if (pdata->serial_dir[i] == RX_MODE) { 2097 if (!offset) { 2098 offset = DAVINCI_MCASP_RXBUF_REG(i); 2099 } else { 2100 pr_err("%s: Only one serializer allowed!\n", 2101 __func__); 2102 break; 2103 } 2104 } 2105 } 2106 2107 return offset; 2108 } 2109 2110 #ifdef CONFIG_GPIOLIB 2111 static int davinci_mcasp_gpio_request(struct gpio_chip *chip, unsigned offset) 2112 { 2113 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2114 2115 if (mcasp->num_serializer && offset < mcasp->num_serializer && 2116 mcasp->serial_dir[offset] != INACTIVE_MODE) { 2117 dev_err(mcasp->dev, "AXR%u pin is used for audio\n", offset); 2118 return -EBUSY; 2119 } 2120 2121 /* Do not change the PIN yet */ 2122 return pm_runtime_resume_and_get(mcasp->dev); 2123 } 2124 2125 static void davinci_mcasp_gpio_free(struct gpio_chip *chip, unsigned offset) 2126 { 2127 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2128 2129 /* Set the direction to input */ 2130 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); 2131 2132 /* Set the pin as McASP pin */ 2133 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); 2134 2135 pm_runtime_put_sync(mcasp->dev); 2136 } 2137 2138 static int davinci_mcasp_gpio_direction_out(struct gpio_chip *chip, 2139 unsigned offset, int value) 2140 { 2141 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2142 u32 val; 2143 2144 if (value) 2145 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); 2146 else 2147 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); 2148 2149 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); 2150 if (!(val & BIT(offset))) { 2151 /* Set the pin as GPIO pin */ 2152 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); 2153 2154 /* Set the direction to output */ 2155 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); 2156 } 2157 2158 return 0; 2159 } 2160 2161 static void davinci_mcasp_gpio_set(struct gpio_chip *chip, unsigned offset, 2162 int value) 2163 { 2164 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2165 2166 if (value) 2167 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); 2168 else 2169 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); 2170 } 2171 2172 static int davinci_mcasp_gpio_direction_in(struct gpio_chip *chip, 2173 unsigned offset) 2174 { 2175 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2176 u32 val; 2177 2178 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); 2179 if (!(val & BIT(offset))) { 2180 /* Set the direction to input */ 2181 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); 2182 2183 /* Set the pin as GPIO pin */ 2184 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); 2185 } 2186 2187 return 0; 2188 } 2189 2190 static int davinci_mcasp_gpio_get(struct gpio_chip *chip, unsigned offset) 2191 { 2192 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2193 u32 val; 2194 2195 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDSET_REG); 2196 if (val & BIT(offset)) 2197 return 1; 2198 2199 return 0; 2200 } 2201 2202 static int davinci_mcasp_gpio_get_direction(struct gpio_chip *chip, 2203 unsigned offset) 2204 { 2205 struct davinci_mcasp *mcasp = gpiochip_get_data(chip); 2206 u32 val; 2207 2208 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG); 2209 if (val & BIT(offset)) 2210 return 0; 2211 2212 return 1; 2213 } 2214 2215 static const struct gpio_chip davinci_mcasp_template_chip = { 2216 .owner = THIS_MODULE, 2217 .request = davinci_mcasp_gpio_request, 2218 .free = davinci_mcasp_gpio_free, 2219 .direction_output = davinci_mcasp_gpio_direction_out, 2220 .set = davinci_mcasp_gpio_set, 2221 .direction_input = davinci_mcasp_gpio_direction_in, 2222 .get = davinci_mcasp_gpio_get, 2223 .get_direction = davinci_mcasp_gpio_get_direction, 2224 .base = -1, 2225 .ngpio = 32, 2226 }; 2227 2228 static int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) 2229 { 2230 if (!davinci_mcasp_have_gpiochip(mcasp)) 2231 return 0; 2232 2233 mcasp->gpio_chip = davinci_mcasp_template_chip; 2234 mcasp->gpio_chip.label = dev_name(mcasp->dev); 2235 mcasp->gpio_chip.parent = mcasp->dev; 2236 2237 return devm_gpiochip_add_data(mcasp->dev, &mcasp->gpio_chip, mcasp); 2238 } 2239 2240 #else /* CONFIG_GPIOLIB */ 2241 static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) 2242 { 2243 return 0; 2244 } 2245 #endif /* CONFIG_GPIOLIB */ 2246 2247 static int davinci_mcasp_probe(struct platform_device *pdev) 2248 { 2249 struct snd_dmaengine_dai_dma_data *dma_data; 2250 struct resource *mem, *dat; 2251 struct davinci_mcasp *mcasp; 2252 char *irq_name; 2253 int irq; 2254 int ret; 2255 2256 if (!pdev->dev.platform_data && !pdev->dev.of_node) { 2257 dev_err(&pdev->dev, "No platform data supplied\n"); 2258 return -EINVAL; 2259 } 2260 2261 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp), 2262 GFP_KERNEL); 2263 if (!mcasp) 2264 return -ENOMEM; 2265 2266 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu"); 2267 if (!mem) { 2268 dev_warn(&pdev->dev, 2269 "\"mpu\" mem resource not found, using index 0\n"); 2270 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2271 if (!mem) { 2272 dev_err(&pdev->dev, "no mem resource?\n"); 2273 return -ENODEV; 2274 } 2275 } 2276 2277 mcasp->base = devm_ioremap_resource(&pdev->dev, mem); 2278 if (IS_ERR(mcasp->base)) 2279 return PTR_ERR(mcasp->base); 2280 2281 dev_set_drvdata(&pdev->dev, mcasp); 2282 pm_runtime_enable(&pdev->dev); 2283 2284 mcasp->dev = &pdev->dev; 2285 ret = davinci_mcasp_get_config(mcasp, pdev); 2286 if (ret) 2287 goto err; 2288 2289 /* All PINS as McASP */ 2290 pm_runtime_get_sync(mcasp->dev); 2291 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000); 2292 pm_runtime_put(mcasp->dev); 2293 2294 /* Skip audio related setup code if the configuration is not adequat */ 2295 if (mcasp->missing_audio_param) 2296 goto no_audio; 2297 2298 irq = platform_get_irq_byname_optional(pdev, "common"); 2299 if (irq > 0) { 2300 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common", 2301 dev_name(&pdev->dev)); 2302 if (!irq_name) { 2303 ret = -ENOMEM; 2304 goto err; 2305 } 2306 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, 2307 davinci_mcasp_common_irq_handler, 2308 IRQF_ONESHOT | IRQF_SHARED, 2309 irq_name, mcasp); 2310 if (ret) { 2311 dev_err(&pdev->dev, "common IRQ request failed\n"); 2312 goto err; 2313 } 2314 2315 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN; 2316 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN; 2317 } 2318 2319 irq = platform_get_irq_byname_optional(pdev, "rx"); 2320 if (irq > 0) { 2321 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx", 2322 dev_name(&pdev->dev)); 2323 if (!irq_name) { 2324 ret = -ENOMEM; 2325 goto err; 2326 } 2327 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, 2328 davinci_mcasp_rx_irq_handler, 2329 IRQF_ONESHOT, irq_name, mcasp); 2330 if (ret) { 2331 dev_err(&pdev->dev, "RX IRQ request failed\n"); 2332 goto err; 2333 } 2334 2335 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN; 2336 } 2337 2338 irq = platform_get_irq_byname_optional(pdev, "tx"); 2339 if (irq > 0) { 2340 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx", 2341 dev_name(&pdev->dev)); 2342 if (!irq_name) { 2343 ret = -ENOMEM; 2344 goto err; 2345 } 2346 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, 2347 davinci_mcasp_tx_irq_handler, 2348 IRQF_ONESHOT, irq_name, mcasp); 2349 if (ret) { 2350 dev_err(&pdev->dev, "TX IRQ request failed\n"); 2351 goto err; 2352 } 2353 2354 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN; 2355 } 2356 2357 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat"); 2358 if (dat) 2359 mcasp->dat_port = true; 2360 2361 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK]; 2362 dma_data->filter_data = "tx"; 2363 if (dat) { 2364 dma_data->addr = dat->start; 2365 /* 2366 * According to the TRM there should be 0x200 offset added to 2367 * the DAT port address 2368 */ 2369 if (mcasp->version == MCASP_VERSION_OMAP) 2370 dma_data->addr += davinci_mcasp_txdma_offset(mcasp->pdata); 2371 } else { 2372 dma_data->addr = mem->start + davinci_mcasp_txdma_offset(mcasp->pdata); 2373 } 2374 2375 2376 /* RX is not valid in DIT mode */ 2377 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) { 2378 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE]; 2379 dma_data->filter_data = "rx"; 2380 if (dat) 2381 dma_data->addr = dat->start; 2382 else 2383 dma_data->addr = 2384 mem->start + davinci_mcasp_rxdma_offset(mcasp->pdata); 2385 } 2386 2387 if (mcasp->version < MCASP_VERSION_3) { 2388 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE; 2389 /* dma_params->dma_addr is pointing to the data port address */ 2390 mcasp->dat_port = true; 2391 } else { 2392 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE; 2393 } 2394 2395 /* Allocate memory for long enough list for all possible 2396 * scenarios. Maximum number tdm slots is 32 and there cannot 2397 * be more serializers than given in the configuration. The 2398 * serializer directions could be taken into account, but it 2399 * would make code much more complex and save only couple of 2400 * bytes. 2401 */ 2402 mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list = 2403 devm_kcalloc(mcasp->dev, 2404 32 + mcasp->num_serializer - 1, 2405 sizeof(unsigned int), 2406 GFP_KERNEL); 2407 2408 mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list = 2409 devm_kcalloc(mcasp->dev, 2410 32 + mcasp->num_serializer - 1, 2411 sizeof(unsigned int), 2412 GFP_KERNEL); 2413 2414 if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list || 2415 !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) { 2416 ret = -ENOMEM; 2417 goto err; 2418 } 2419 2420 ret = davinci_mcasp_set_ch_constraints(mcasp); 2421 if (ret) 2422 goto err; 2423 2424 mcasp_reparent_fck(pdev); 2425 2426 ret = davinci_mcasp_get_dma_type(mcasp); 2427 switch (ret) { 2428 case PCM_EDMA: 2429 ret = edma_pcm_platform_register(&pdev->dev); 2430 break; 2431 case PCM_SDMA: 2432 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) 2433 ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx"); 2434 else 2435 ret = sdma_pcm_platform_register(&pdev->dev, "tx", NULL); 2436 break; 2437 case PCM_UDMA: 2438 ret = udma_pcm_platform_register(&pdev->dev); 2439 break; 2440 default: 2441 dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret); 2442 fallthrough; 2443 case -EPROBE_DEFER: 2444 goto err; 2445 } 2446 2447 if (ret) { 2448 dev_err(&pdev->dev, "register PCM failed: %d\n", ret); 2449 goto err; 2450 } 2451 2452 ret = devm_snd_soc_register_component(&pdev->dev, &davinci_mcasp_component, 2453 &davinci_mcasp_dai[mcasp->op_mode], 1); 2454 2455 if (ret != 0) 2456 goto err; 2457 2458 no_audio: 2459 ret = davinci_mcasp_init_gpiochip(mcasp); 2460 if (ret) { 2461 dev_err(&pdev->dev, "gpiochip registration failed: %d\n", ret); 2462 goto err; 2463 } 2464 2465 return 0; 2466 err: 2467 pm_runtime_disable(&pdev->dev); 2468 return ret; 2469 } 2470 2471 static void davinci_mcasp_remove(struct platform_device *pdev) 2472 { 2473 pm_runtime_disable(&pdev->dev); 2474 } 2475 2476 #ifdef CONFIG_PM 2477 static int davinci_mcasp_runtime_suspend(struct device *dev) 2478 { 2479 struct davinci_mcasp *mcasp = dev_get_drvdata(dev); 2480 struct davinci_mcasp_context *context = &mcasp->context; 2481 u32 reg; 2482 int i; 2483 2484 for (i = 0; i < ARRAY_SIZE(context_regs); i++) 2485 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]); 2486 2487 if (mcasp->txnumevt) { 2488 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; 2489 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg); 2490 } 2491 if (mcasp->rxnumevt) { 2492 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; 2493 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg); 2494 } 2495 2496 for (i = 0; i < mcasp->num_serializer; i++) 2497 context->xrsr_regs[i] = mcasp_get_reg(mcasp, 2498 DAVINCI_MCASP_XRSRCTL_REG(i)); 2499 2500 return 0; 2501 } 2502 2503 static int davinci_mcasp_runtime_resume(struct device *dev) 2504 { 2505 struct davinci_mcasp *mcasp = dev_get_drvdata(dev); 2506 struct davinci_mcasp_context *context = &mcasp->context; 2507 u32 reg; 2508 int i; 2509 2510 for (i = 0; i < ARRAY_SIZE(context_regs); i++) 2511 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]); 2512 2513 if (mcasp->txnumevt) { 2514 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; 2515 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]); 2516 } 2517 if (mcasp->rxnumevt) { 2518 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; 2519 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]); 2520 } 2521 2522 for (i = 0; i < mcasp->num_serializer; i++) 2523 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), 2524 context->xrsr_regs[i]); 2525 2526 return 0; 2527 } 2528 2529 #endif 2530 2531 static const struct dev_pm_ops davinci_mcasp_pm_ops = { 2532 SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend, 2533 davinci_mcasp_runtime_resume, 2534 NULL) 2535 }; 2536 2537 static struct platform_driver davinci_mcasp_driver = { 2538 .probe = davinci_mcasp_probe, 2539 .remove_new = davinci_mcasp_remove, 2540 .driver = { 2541 .name = "davinci-mcasp", 2542 .pm = &davinci_mcasp_pm_ops, 2543 .of_match_table = mcasp_dt_ids, 2544 }, 2545 }; 2546 2547 module_platform_driver(davinci_mcasp_driver); 2548 2549 MODULE_AUTHOR("Steve Chen"); 2550 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface"); 2551 MODULE_LICENSE("GPL"); 2552