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_aic;
  88         struct clk *clk_i2s;
  89
  90         struct jz4740_pcm_config pcm_config;
  91 };
  92
  93 static struct jz4740_dma_config jz4740_i2s_dma_playback_config = {
  94         .src_width = JZ4740_DMA_WIDTH_16BIT,
  95         .dst_width = JZ4740_DMA_WIDTH_32BIT,
  96         .transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE,
  97         .request_type = JZ4740_DMA_TYPE_AIC_TRANSMIT,
  98         .flags = JZ4740_DMA_SRC_AUTOINC,
  99         .mode = JZ4740_DMA_MODE_SINGLE,
 100 };
 101
 102 static struct jz4740_dma_config jz4740_i2s_dma_capture_config = {
 103         .src_width = JZ4740_DMA_WIDTH_32BIT,
 104         .dst_width = JZ4740_DMA_WIDTH_16BIT,
 105         .transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE,
 106         .request_type = JZ4740_DMA_TYPE_AIC_RECEIVE,
 107         .flags = JZ4740_DMA_DST_AUTOINC,
 108         .mode = JZ4740_DMA_MODE_SINGLE,
 109 };
 110
 111
 112 static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s, unsigned int reg)
 113 {
 114         return readl(i2s->base + reg);
 115 }
 116
 117 static inline void jz4740_i2s_write(const struct jz4740_i2s *i2s, unsigned
 118 int reg, uint32_t value)
 119 {
 120         writel(value, i2s->base + reg);
 121 }
 122
 123 static inline struct jz4740_i2s *jz4740_dai_to_i2s(struct snd_soc_dai *dai)
 124 {
 125         return dai->private_data;
 126 }
 127
 128 static int jz4740_i2s_startup(struct snd_pcm_substream *substream, struct
 129                               snd_soc_dai *dai)
 130 {
 131         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 132         uint32_t conf, ctrl;
 133
 134         if (dai->active)
 135                 return 0;
 136
 137         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 138         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 139
 140         conf |= JZ_AIC_CONF_ENABLE;
 141         ctrl |= JZ_AIC_CTRL_FLUSH;
 142
 143
 144         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
 145         clk_enable(i2s->clk_i2s);
 146         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 147
 148         return 0;
 149 }
 150
 151 static void jz4740_i2s_shutdown(struct snd_pcm_substream *substream, struct
 152                               snd_soc_dai *dai)
 153 {
 154         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 155         uint32_t conf;
 156
 157         if (!dai->active)
 158                 return;
 159
 160         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 161         conf &= ~JZ_AIC_CONF_ENABLE;
 162         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 163
 164         clk_disable(i2s->clk_i2s);
 165 }
 166
 167
 168 static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 169                                struct snd_soc_dai *dai)
 170 {
 171         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 172         bool playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 173
 174         uint32_t ctrl;
 175         uint32_t mask;
 176
 177         if (playback) {
 178             mask = JZ_AIC_CTRL_ENABLE_PLAYBACK |
 179                    JZ_AIC_CTRL_ENABLE_TX_DMA;
 180         } else {
 181             mask = JZ_AIC_CTRL_ENABLE_CAPTURE |
 182                    JZ_AIC_CTRL_ENABLE_RX_DMA;
 183         }
 184
 185         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 186
 187         switch (cmd) {
 188         case SNDRV_PCM_TRIGGER_START:
 189         case SNDRV_PCM_TRIGGER_RESUME:
 190         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 191             ctrl |= mask;
 192             break;
 193         case SNDRV_PCM_TRIGGER_STOP:
 194         case SNDRV_PCM_TRIGGER_SUSPEND:
 195         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 196             ctrl &= ~mask;
 197             break;
 198         default:
 199             return -EINVAL;
 200         }
 201
 202         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
 203
 204         return 0;
 205 }
 206
 207
 208 static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai,
 209                                unsigned int fmt)
 210 {
 211         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 212
 213         uint32_t format = 0;
 214         uint32_t conf;
 215
 216         conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 217
 218         conf &= ~(JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER);
 219
 220         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 221         case SND_SOC_DAIFMT_CBS_CFS:
 222             conf |= JZ_AIC_CONF_BIT_CLK_MASTER |
 223                     JZ_AIC_CONF_SYNC_CLK_MASTER;
 224             format |= JZ_AIC_I2S_FMT_ENABLE_SYS_CLK;
 225             break;
 226         case SND_SOC_DAIFMT_CBM_CFS:
 227             conf |= JZ_AIC_CONF_SYNC_CLK_MASTER;
 228             break;
 229         case SND_SOC_DAIFMT_CBS_CFM:
 230             conf |= JZ_AIC_CONF_BIT_CLK_MASTER;
 231             break;
 232         case SND_SOC_DAIFMT_CBM_CFM:
 233             break;
 234         default:
 235             return -EINVAL;
 236         }
 237
 238         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 239         case SND_SOC_DAIFMT_MSB:
 240             format |= JZ_AIC_I2S_FMT_MSB;
 241             break;
 242         case SND_SOC_DAIFMT_I2S:
 243             break;
 244         default:
 245             return -EINVAL;
 246         }
 247
 248         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 249         case SND_SOC_DAIFMT_NB_NF:
 250             break;
 251         default:
 252             return -EINVAL;
 253         }
 254
 255         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 256         jz4740_i2s_write(i2s, JZ_REG_AIC_I2S_FMT, format);
 257
 258         return 0;
 259 }
 260
 261 static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
 262                                  struct snd_pcm_hw_params *params,
 263                                  struct snd_soc_dai *dai)
 264 {
 265         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 266         bool playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 267         int sample_size;
 268         enum jz4740_dma_width dma_width;
 269         uint32_t ctrl;
 270
 271         ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
 272
 273         switch (params_format(params)) {
 274         case SNDRV_PCM_FORMAT_S8:
 275             sample_size = 0;
 276                 dma_width = JZ4740_DMA_WIDTH_8BIT;
 277             break;
 278         case SNDRV_PCM_FORMAT_S16:
 279             sample_size = 1;
 280                 dma_width = JZ4740_DMA_WIDTH_16BIT;
 281                 break;
 282         default:
 283                 return -EINVAL;
 284         }
 285
 286         if (playback) {
 287                 ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK;
 288             ctrl |= sample_size << JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET;
 289         } else {
 290                 ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
 291             ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
 292         }
 293
 294         switch (params_channels(params)) {
 295         case 2:
 296             break;
 297         case 1:
 298             if (playback) {
 299                     ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
 300                     break;
 301             }
 302         default:
 303             return -EINVAL;
 304         }
 305
 306         jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
 307
 308         /* This is quite ugly, but apperently it's offical method for passing dma
 309          * config to the pcm module */
 310         if (playback) {
 311                 jz4740_i2s_dma_playback_config.src_width = dma_width;
 312                 i2s->pcm_config.dma_config = &jz4740_i2s_dma_playback_config;
 313         } else {
 314                 jz4740_i2s_dma_capture_config.dst_width = dma_width;
 315                 i2s->pcm_config.dma_config = &jz4740_i2s_dma_capture_config;
 316         }
 317         i2s->pcm_config.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
 318
 319         dai->dma_data = &i2s->pcm_config;
 320
 321         return 0;
 322 }
 323
 324 static int jz4740_i2s_set_clkdiv(struct snd_soc_dai *dai,
 325                                   int div_id, int div)
 326 {
 327         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 328
 329         switch (div_id) {
 330         case JZ4740_I2S_BIT_CLK:
 331                 if (div & 1 || div > 16)
 332                         return -EINVAL;
 333                 jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div - 1);
 334                 break;
 335         default:
 336                 return -EINVAL;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int jz4740_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 343                                   unsigned int freq, int dir)
 344 {
 345         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 346         int ret = 0;
 347         struct clk *parent;
 348
 349         switch (clk_id) {
 350         case JZ4740_I2S_CLKSRC_EXT:
 351                 parent = clk_get(NULL, "ext");
 352                 clk_set_parent(i2s->clk_i2s, parent);
 353                 break;
 354         case JZ4740_I2S_CLKSRC_PLL:
 355                 parent = clk_get(NULL, "pll half");
 356                 clk_set_parent(i2s->clk_i2s, parent);
 357                 ret = clk_set_rate(i2s->clk_i2s, freq);
 358                 break;
 359         default:
 360                 return -EINVAL;
 361         }
 362         clk_put(parent);
 363
 364         return ret;
 365 }
 366
 367 static int jz4740_i2s_suspend(struct snd_soc_dai *dai)
 368 {
 369         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 370         uint32_t conf;
 371
 372         if (dai->active) {
 373                 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 374                 conf &= ~JZ_AIC_CONF_ENABLE;
 375                 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 376
 377                 clk_disable(i2s->clk_i2s);
 378         }
 379
 380         clk_disable(i2s->clk_aic);
 381
 382         return 0;
 383 }
 384
 385 static int jz4740_i2s_resume(struct snd_soc_dai *dai)
 386 {
 387         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 388         uint32_t conf;
 389
 390         clk_enable(i2s->clk_aic);
 391
 392         if (dai->active) {
 393                 clk_enable(i2s->clk_i2s);
 394
 395                 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
 396                 conf |= JZ_AIC_CONF_ENABLE;
 397                 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 398
 399         }
 400
 401         return 0;
 402 }
 403
 404
 405 static int jz4740_i2s_probe(struct platform_device *pdev, struct snd_soc_dai *dai)
 406 {
 407         struct jz4740_i2s *i2s = jz4740_dai_to_i2s(dai);
 408         uint32_t conf;
 409
 410         conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
 411                (8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
 412                JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
 413                    JZ_AIC_CONF_I2S |
 414                JZ_AIC_CONF_INTERNAL_CODEC;
 415
 416         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
 417         jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
 418
 419         return 0;
 420 }
 421
 422
 423 static struct snd_soc_dai_ops jz4740_i2s_dai_ops = {
 424         .startup = jz4740_i2s_startup,
 425         .shutdown = jz4740_i2s_shutdown,
 426         .trigger = jz4740_i2s_trigger,
 427         .hw_params = jz4740_i2s_hw_params,
 428         .set_fmt = jz4740_i2s_set_fmt,
 429         .set_clkdiv = jz4740_i2s_set_clkdiv,
 430         .set_sysclk = jz4740_i2s_set_sysclk,
 431 };
 432
 433 #define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
 434                 SNDRV_PCM_FMTBIT_S16_LE)
 435
 436 struct snd_soc_dai jz4740_i2s_dai = {
 437         .name = "jz4740-i2s",
 438         .probe = jz4740_i2s_probe,
 439         .playback = {
 440                 .channels_min = 1,
 441                 .channels_max = 2,
 442                 .rates = SNDRV_PCM_RATE_8000_44100,
 443                 .formats = JZ4740_I2S_FMTS,
 444         },
 445         .capture = {
 446                 .channels_min = 2,
 447                 .channels_max = 2,
 448                 .rates = SNDRV_PCM_RATE_8000_44100,
 449                 .formats = JZ4740_I2S_FMTS,
 450         },
 451         .symmetric_rates = 1,
 452         .ops = &jz4740_i2s_dai_ops,
 453         .suspend = jz4740_i2s_suspend,
 454         .resume = jz4740_i2s_resume,
 455 };
 456 EXPORT_SYMBOL_GPL(jz4740_i2s_dai);
 457
 458 static int __devinit jz4740_i2s_dev_probe(struct platform_device *pdev)
 459 {
 460         struct jz4740_i2s *i2s;
 461         int ret;
 462
 463         i2s = kzalloc(sizeof(*i2s), GFP_KERNEL);
 464
 465         if (!i2s)
 466                 return -ENOMEM;
 467
 468         i2s->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 469
 470         if (!i2s->mem) {
 471                 ret = -ENOENT;
 472                 goto err_free;
 473         }
 474
 475         i2s->mem = request_mem_region(i2s->mem->start, resource_size(i2s->mem),
 476                                 pdev->name);
 477
 478         if (!i2s->mem) {
 479                 ret = -EBUSY;
 480                 goto err_free;
 481         }
 482
 483         i2s->base = ioremap_nocache(i2s->mem->start, resource_size(i2s->mem));
 484
 485         if (!i2s->base) {
 486                 ret = -EBUSY;
 487                 goto err_release_mem_region;
 488         }
 489
 490         i2s->phys_base = i2s->mem->start;
 491
 492         jz4740_i2s_dai.private_data = i2s;
 493
 494         ret = snd_soc_register_dai(&jz4740_i2s_dai);
 495
 496         i2s->clk_aic = clk_get(&pdev->dev, "aic");
 497
 498         if (IS_ERR(i2s->clk_aic)) {
 499                 ret = PTR_ERR(i2s->clk_aic);
 500                 goto err_iounmap;
 501         }
 502
 503
 504         i2s->clk_i2s = clk_get(&pdev->dev, "i2s");
 505
 506         if (IS_ERR(i2s->clk_i2s)) {
 507                 ret = PTR_ERR(i2s->clk_i2s);
 508                 goto err_iounmap;
 509         }
 510
 511         clk_enable(i2s->clk_aic);
 512
 513         platform_set_drvdata(pdev, i2s);
 514
 515         return 0;
 516
 517 err_iounmap:
 518         iounmap(i2s->base);
 519 err_release_mem_region:
 520         release_mem_region(i2s->mem->start, resource_size(i2s->mem));
 521 err_free:
 522         kfree(i2s);
 523
 524         return ret;
 525 }
 526
 527 static int __devexit jz4740_i2s_dev_remove(struct platform_device *pdev)
 528 {
 529         struct jz4740_i2s *i2s = platform_get_drvdata(pdev);
 530
 531         snd_soc_unregister_dai(&jz4740_i2s_dai);
 532
 533         clk_disable(i2s->clk_aic);
 534         clk_put(i2s->clk_i2s);
 535         clk_put(i2s->clk_aic);
 536
 537         iounmap(i2s->base);
 538         release_mem_region(i2s->mem->start, resource_size(i2s->mem));
 539
 540         platform_set_drvdata(pdev, NULL);
 541         kfree(i2s);
 542
 543         return 0;
 544 }
 545
 546 static struct platform_driver jz4740_i2s_driver = {
 547         .probe = jz4740_i2s_dev_probe,
 548         .remove = __devexit_p(jz4740_i2s_dev_remove),
 549         .driver = {
 550                 .name = "jz4740-i2s",
 551                 .owner = THIS_MODULE,
 552         },
 553 };
 554
 555 static int __init jz4740_i2s_init(void)
 556 {
 557         return platform_driver_register(&jz4740_i2s_driver);
 558 }
 559 module_init(jz4740_i2s_init);
 560
 561 static void __exit jz4740_i2s_exit(void)
 562 {
 563         platform_driver_unregister(&jz4740_i2s_driver);
 564 }
 565 module_exit(jz4740_i2s_exit);
 566
 567 MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>");
 568 MODULE_DESCRIPTION("Ingenic JZ4740 SoC I2S driver");
 569 MODULE_LICENSE("GPL");
 570 MODULE_ALIAS("platform:jz4740-i2s");