target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-i2s.c

   1 /*
   2  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   3  *
   4  *  This program is free software; you can redistribute  it and/or modify it
   5  *  under  the terms of  the GNU General  Public License as published by the
   6  *  Free Software Foundation;  either version 2 of the  License, or (at your
   7  *  option) any later version.
   8  *
   9  *  You should have received a copy of the  GNU General Public License along
  10  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  11  *  675 Mass Ave, Cambridge, MA 02139, USA.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/clk.h>
  21 #include <linux/io.h>
  22 #include <linux/delay.h>
  23
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28 #include <sound/soc-dapm.h>
  29 #include <sound/initval.h>
  30
  31 #include "jz4740-i2s.h"
  32 #include "jz4740-pcm.h"
  33
  34 #define JZ_REG_AIC_CONF         0x00
  35 #define JZ_REG_AIC_CTRL         0x04
  36 #define JZ_REG_AIC_I2S_FMT      0x10
  37 #define JZ_REG_AIC_FIFO_STATUS  0x14
  38 #define JZ_REG_AIC_I2S_STATUS   0x1c
  39 #define JZ_REG_AIC_CLK_DIV      0x30
  40 #define JZ_REG_AIC_FIFO         0x34
  41
  42 #define JZ_AIC_CONF_FIFO_RX_THRESHOLD_MASK (0xf << 12)
  43 #define JZ_AIC_CONF_FIFO_TX_THRESHOLD_MASK (0xf <<  8)
  44 #define JZ_AIC_CONF_OVERFLOW_PLAY_LAST BIT(6)
  45 #define JZ_AIC_CONF_INTERNAL_CODEC BIT(5)
  46 #define JZ_AIC_CONF_I2S BIT(4)
  47 #define JZ_AIC_CONF_RESET BIT(3)
  48 #define JZ_AIC_CONF_BIT_CLK_MASTER BIT(2)
  49 #define JZ_AIC_CONF_SYNC_CLK_MASTER BIT(1)
  50 #define JZ_AIC_CONF_ENABLE BIT(0)
  51
  52 #define JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET 12
  53 #define JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET 8
  54
  55 #define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK (0x7 << 19)
  56 #define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK (0x7 << 16)
  57 #define JZ_AIC_CTRL_ENABLE_RX_DMA BIT(15)
  58 #define JZ_AIC_CTRL_ENABLE_TX_DMA BIT(14)
  59 #define JZ_AIC_CTRL_MONO_TO_STEREO BIT(11)
  60 #define JZ_AIC_CTRL_SWITCH_ENDIANNESS BIT(10)
  61 #define JZ_AIC_CTRL_SIGNED_TO_UNSIGNED BIT(9)
  62 #define JZ_AIC_CTRL_FLUSH               BIT(8)
  63 #define JZ_AIC_CTRL_ENABLE_ROR_INT BIT(6)
  64 #define JZ_AIC_CTRL_ENABLE_TUR_INT BIT(5)
  65 #define JZ_AIC_CTRL_ENABLE_RFS_INT BIT(4)
  66 #define JZ_AIC_CTRL_ENABLE_TFS_INT BIT(3)
  67 #define JZ_AIC_CTRL_ENABLE_LOOPBACK BIT(2)
  68 #define JZ_AIC_CTRL_ENABLE_PLAYBACK BIT(1)
  69 #define JZ_AIC_CTRL_ENABLE_CAPTURE BIT(0)
  70
  71 #define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET 19
  72 #define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET  16
  73
  74 #define JZ_AIC_I2S_FMT_DISABLE_BIT_CLK BIT(12)
  75 #define JZ_AIC_I2S_FMT_ENABLE_SYS_CLK BIT(4)
  76 #define JZ_AIC_I2S_FMT_MSB BIT(0)
  77
  78 #define JZ_AIC_I2S_STATUS_BUSY BIT(2)
  79
  80 #define JZ_AIC_CLK_DIV_MASK 0xf
  81
  82 struct jz4740_i2s {
  83         struct resource *mem;
  84         void __iomem *base;
  85         dma_addr_t phys_base;
  86
  87         struct clk *clk;
  88
  89         struct jz4740_pcm_config pcm_config;
  90 };
  91
  92 static struct jz4740_dma_config jz4740_i2s_dma_playback_config = {
  93         .src_width = JZ4740_DMA_WIDTH_16BIT,
  94         .dst_width = JZ4740_DMA_WIDTH_32BIT,
  95         .transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE,
  96         .request_type = JZ4740_DMA_TYPE_AIC_TRANSMIT,
  97         .flags = JZ4740_DMA_SRC_AUTOINC,
  98         .mode = JZ4740_DMA_MODE_SINGLE,
  99 };
 100
 101 static struct jz4740_dma_config jz4740_i2s_dma_capture_config = {
 102         .src_width = JZ4740_DMA_WIDTH_32BIT,
 103         .dst_width = JZ4740_DMA_WIDTH_16BIT,
 104         .transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE,
 105         .request_type = JZ4740_DMA_TYPE_AIC_RECEIVE,
 106         .flags = JZ4740_DMA_DST_AUTOINC,
 107         .mode = JZ4740_DMA_MODE_SINGLE,
 108 };
 109
 110
 111 static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s, unsigned int reg)
 112 {
 113         return readl(i2s->base + reg);
 114 }
 115
 116 static inline void jz4740_i2s_write(const struct jz4740_i2s *i2s, unsigned
 117 int reg, uint32_t value)
 118 {
 119         writel(value, i2s->base + reg);
 120 }
 121
 122 static inline struct jz4740_i2s *jz4740_dai_to_i2s(struct snd_soc_dai *dai)
 123 {
 124         return dai->private_data;
 125 }
 126
 127 static int jz4740_i2s_startup(struct snd_pcm_substream *substream, struct
 128                               snd_soc_dai *dai)
 129 {
 130         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 131         uint32_t conf, ctrl;
 132
 133         if (dai->active)
 134                 return 0;
 135
 136         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 137         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 138
 139         conf |= JZ_AIC_CONF_ENABLE;
 140         ctrl |= JZ_AIC_CTRL_FLUSH;
 141
 142
 143         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
 144         clk_enable(i2s->clk);
 145         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 146
 147         return 0;
 148 }
 149
 150 static void jz4740_i2s_shutdown(struct snd_pcm_substream *substream, struct
 151                               snd_soc_dai *dai)
 152 {
 153         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 154         uint32_t conf;
 155
 156         if (dai->active)
 157                 return;
 158
 159         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 160         conf &= ~JZ_AIC_CONF_ENABLE;
 161         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 162
 163         clk_disable(i2s->clk);
 164 }
 165
 166
 167 static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 168                                struct snd_soc_dai *dai)
 169 {
 170         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 171         bool playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 172
 173         uint32_t ctrl;
 174         uint32_t mask;
 175
 176         if (playback) {
 177             mask = JZ_AIC_CTRL_ENABLE_PLAYBACK |
 178                    JZ_AIC_CTRL_ENABLE_TX_DMA;
 179         } else {
 180             mask = JZ_AIC_CTRL_ENABLE_CAPTURE |
 181                    JZ_AIC_CTRL_ENABLE_RX_DMA;
 182         }
 183
 184         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 185
 186         switch (cmd) {
 187         case SNDRV_PCM_TRIGGER_START:
 188         case SNDRV_PCM_TRIGGER_RESUME:
 189         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 190             ctrl |= mask;
 191             break;
 192         case SNDRV_PCM_TRIGGER_STOP:
 193         case SNDRV_PCM_TRIGGER_SUSPEND:
 194         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 195             ctrl &= ~mask;
 196             break;
 197         default:
 198             return -EINVAL;
 199         }
 200
 201         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL,ctrl);
 202
 203         return 0;
 204 }
 205
 206
 207 static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai,
 208                                unsigned int fmt)
 209 {
 210         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 211
 212         uint32_t format = 0;
 213         uint32_t conf;
 214
 215         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 216
 217         conf &= ~(JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER);
 218
 219         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 220         case SND_SOC_DAIFMT_CBS_CFS:
 221             conf |= JZ_AIC_CONF_BIT_CLK_MASTER |
 222                     JZ_AIC_CONF_SYNC_CLK_MASTER;
 223             format |= JZ_AIC_I2S_FMT_ENABLE_SYS_CLK;
 224             break;
 225         case SND_SOC_DAIFMT_CBM_CFS:
 226             conf |= JZ_AIC_CONF_SYNC_CLK_MASTER;
 227             break;
 228         case SND_SOC_DAIFMT_CBS_CFM:
 229             conf |= JZ_AIC_CONF_BIT_CLK_MASTER;
 230             break;
 231         case SND_SOC_DAIFMT_CBM_CFM:
 232             break;
 233         default:
 234             return -EINVAL;
 235         }
 236
 237         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 238         case SND_SOC_DAIFMT_MSB:
 239             format |= JZ_AIC_I2S_FMT_MSB;
 240             break;
 241         case SND_SOC_DAIFMT_I2S:
 242             break;
 243         default:
 244             return -EINVAL;
 245         }
 246
 247         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 248         case SND_SOC_DAIFMT_NB_NF:
 249             break;
 250         default:
 251             return -EINVAL;
 252         }
 253
 254         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 255         jz4740_i2s_write(i2s, JZ_REG_AIC_I2S_FMT, format);
 256
 257         return 0;
 258 }
 259
 260 static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
 261                                  struct snd_pcm_hw_params *params,
 262                                  struct snd_soc_dai *dai)
 263 {
 264         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 265         bool playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 266         int sample_size;
 267         enum jz4740_dma_width dma_width;
 268         uint32_t ctrl;
 269
 270         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 271
 272         switch (params_format(params)) {
 273         case SNDRV_PCM_FORMAT_S8:
 274             sample_size = 0;
 275                 dma_width = JZ4740_DMA_WIDTH_8BIT;
 276             break;
 277         case SNDRV_PCM_FORMAT_S16:
 278             sample_size = 1;
 279                 dma_width = JZ4740_DMA_WIDTH_16BIT;
 280                 break;
 281         default:
 282                 return -EINVAL;
 283         }
 284
 285         if (playback) {
 286                 ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK;
 287             ctrl |= sample_size << JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET;
 288         } else {
 289                 ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
 290             ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
 291         }
 292
 293         switch (params_channels(params)) {
 294         case 2:
 295             break;
 296         case 1:
 297             if (playback) {
 298                     ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
 299                     break;
 300             }
 301         default:
 302             return -EINVAL;
 303         }
 304
 305         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
 306
 307         /* This is quite ugly, but apperently it's offical method for passing dma
 308          * config to the pcm module */
 309         if (playback) {
 310                 jz4740_i2s_dma_playback_config.src_width = dma_width;
 311                 i2s->pcm_config.dma_config = &jz4740_i2s_dma_playback_config;
 312         } else {
 313                 jz4740_i2s_dma_capture_config.dst_width = dma_width;
 314                 i2s->pcm_config.dma_config = &jz4740_i2s_dma_capture_config;
 315         }
 316         i2s->pcm_config.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
 317
 318         dai->dma_data = &i2s->pcm_config;
 319
 320         return 0;
 321 }
 322
 323 static int jz4740_i2s_set_clkdiv(struct snd_soc_dai *dai,
 324                                   int div_id, int div)
 325 {
 326         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 327
 328         switch (div_id) {
 329         case JZ4740_I2S_BIT_CLK:
 330                 if (div & 1 || div > 16)
 331                         return -EINVAL;
 332                 jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div - 1);
 333                 break;
 334         default:
 335                 return -EINVAL;
 336         }
 337
 338         return 0;
 339 }
 340
 341 static int jz4740_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 342                                   unsigned int freq, int dir)
 343 {
 344         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 345         int ret = 0;
 346         struct clk *parent;
 347
 348         switch (clk_id) {
 349         case JZ4740_I2S_CLKSRC_EXT:
 350                 parent = clk_get(NULL, "ext");
 351                 clk_set_parent(i2s->clk, parent);
 352                 break;
 353         case JZ4740_I2S_CLKSRC_PLL:
 354                 parent = clk_get(NULL, "pll half");
 355                 clk_set_parent(i2s->clk, parent);
 356                 ret = clk_set_rate(i2s->clk, freq);
 357                 break;
 358         default:
 359                 return -EINVAL;
 360         }
 361         clk_put(parent);
 362
 363         return ret;
 364 }
 365
 366 static int jz4740_i2s_suspend(struct snd_soc_dai *dai)
 367 {
 368         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 369         uint32_t conf;
 370
 371         if (!dai->active)
 372                 return 0;
 373
 374         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 375         conf &= ~JZ_AIC_CONF_ENABLE;
 376         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 377
 378         clk_disable(i2s->clk);
 379         return 0;
 380 }
 381
 382 static int jz4740_i2s_resume(struct snd_soc_dai *dai)
 383 {
 384         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 385         uint32_t conf;
 386
 387         if (!dai->active)
 388                 return 0;
 389
 390         clk_enable(i2s->clk);
 391
 392         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 393         conf |= JZ_AIC_CONF_ENABLE;
 394         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 395
 396         return 0;
 397 }
 398
 399
 400 static int jz4740_i2s_probe(struct platform_device *pdev, struct snd_soc_dai *dai)
 401 {
 402         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 403         uint32_t conf;
 404
 405         conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
 406                (8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
 407                JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
 408                    JZ_AIC_CONF_I2S |
 409                JZ_AIC_CONF_INTERNAL_CODEC;
 410
 411         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
 412         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 413
 414         return 0;
 415 }
 416
 417
 418 static struct snd_soc_dai_ops jz4740_i2s_dai_ops = {
 419         .startup = jz4740_i2s_startup,
 420         .shutdown = jz4740_i2s_shutdown,
 421         .trigger = jz4740_i2s_trigger,
 422         .hw_params = jz4740_i2s_hw_params,
 423         .set_fmt = jz4740_i2s_set_fmt,
 424         .set_clkdiv = jz4740_i2s_set_clkdiv,
 425         .set_sysclk = jz4740_i2s_set_sysclk,
 426 };
 427
 428 #define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
 429                 SNDRV_PCM_FMTBIT_S16_LE)
 430
 431 struct snd_soc_dai jz4740_i2s_dai = {
 432         .name = "jz4740-i2s",
 433         .probe = jz4740_i2s_probe,
 434         .playback = {
 435                 .channels_min = 1,
 436                 .channels_max = 2,
 437                 .rates = SNDRV_PCM_RATE_8000_44100,
 438                 .formats = JZ4740_I2S_FMTS,
 439         },
 440         .capture = {
 441                 .channels_min = 2,
 442                 .channels_max = 2,
 443                 .rates = SNDRV_PCM_RATE_8000_44100,
 444                 .formats = JZ4740_I2S_FMTS,
 445         },
 446         .symmetric_rates = 1,
 447         .ops = &jz4740_i2s_dai_ops,
 448         .suspend = jz4740_i2s_suspend,
 449         .resume = jz4740_i2s_resume,
 450 };
 451
 452 static int __devinit jz4740_i2s_dev_probe(struct platform_device *pdev)
 453 {
 454         struct jz4740_i2s *i2s;
 455         int ret;
 456
 457         i2s = kzalloc(sizeof(*i2s), GFP_KERNEL);
 458
 459         if (!i2s)
 460                 return -ENOMEM;
 461
 462         i2s->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 463
 464         if (!i2s->mem) {
 465                 ret = -ENOENT;
 466                 goto err_free;
 467         }
 468
 469         i2s->mem = request_mem_region(i2s->mem->start, resource_size(i2s->mem),
 470                                 pdev->name);
 471
 472         if (!i2s->mem) {
 473                 ret = -EBUSY;
 474                 goto err_free;
 475         }
 476
 477         i2s->base = ioremap_nocache(i2s->mem->start, resource_size(i2s->mem));
 478
 479         if (!i2s->base) {
 480                 ret = -EBUSY;
 481                 goto err_release_mem_region;
 482         }
 483
 484         i2s->phys_base = i2s->mem->start;
 485
 486         jz4740_i2s_dai.private_data = i2s;
 487
 488         ret = snd_soc_register_dai(&jz4740_i2s_dai);
 489
 490         i2s->clk = clk_get(&pdev->dev, "i2s");
 491
 492         if (IS_ERR(i2s->clk)) {
 493                 ret = PTR_ERR(i2s->clk);
 494                 goto err_iounmap;
 495         }
 496
 497         platform_set_drvdata(pdev, i2s);
 498
 499         return 0;
 500
 501 err_iounmap:
 502         iounmap(i2s->base);
 503 err_release_mem_region:
 504         release_mem_region(i2s->mem->start, resource_size(i2s->mem));
 505 err_free:
 506         kfree(i2s);
 507
 508         return ret;
 509 }
 510
 511 static int __devexit jz4740_i2s_dev_remove(struct platform_device *pdev)
 512 {
 513         struct jz4740_i2s *i2s = platform_get_drvdata(pdev);
 514
 515         snd_soc_unregister_dai(&jz4740_i2s_dai);
 516
 517         clk_put(i2s->clk);
 518
 519         iounmap(i2s->base);
 520         release_mem_region(i2s->mem->start, resource_size(i2s->mem));
 521
 522         platform_set_drvdata(pdev, NULL);
 523         kfree(i2s);
 524
 525         return 0;
 526 }
 527
 528 static struct platform_driver jz4740_i2s_driver = {
 529         .probe = jz4740_i2s_dev_probe,
 530         .remove = __devexit_p(jz4740_i2s_dev_remove),
 531         .driver = {
 532                 .name = "jz4740-i2s",
 533                 .owner = THIS_MODULE,
 534         },
 535 };
 536
 537 static int __init jz4740_i2s_init(void)
 538 {
 539         return platform_driver_register(&jz4740_i2s_driver);
 540 }
 541 module_init(jz4740_i2s_init);
 542
 543 static void __exit jz4740_i2s_exit(void)
 544 {
 545         platform_driver_unregister(&jz4740_i2s_driver);
 546 }
 547 module_exit(jz4740_i2s_exit);
 548
 549 MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>");
 550 MODULE_DESCRIPTION("Ingenic JZ4740 SoC I2S driver");
 551 MODULE_LICENSE("GPL");
 552 MODULE_ALIAS("platform:jz4740-i2s");