1 /* 2 * Driver for audio on multifunction CS5535 companion device 3 * Copyright (C) Jaya Kumar 4 * 5 * Based on Jaroslav Kysela and Takashi Iwai's examples. 6 * This work was sponsored by CIS(M) Sdn Bhd. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 * todo: add be fmt support, spdif, pm 23 */ 24 25 #include <linux/init.h> 26 #include <linux/slab.h> 27 #include <linux/pci.h> 28 #include <sound/driver.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/initval.h> 32 #include <sound/asoundef.h> 33 #include <sound/pcm.h> 34 #include <sound/pcm_params.h> 35 #include <sound/ac97_codec.h> 36 #include "cs5535audio.h" 37 38 static struct snd_pcm_hardware snd_cs5535audio_playback = 39 { 40 .info = ( 41 SNDRV_PCM_INFO_MMAP | 42 SNDRV_PCM_INFO_INTERLEAVED | 43 SNDRV_PCM_INFO_BLOCK_TRANSFER | 44 SNDRV_PCM_INFO_MMAP_VALID | 45 SNDRV_PCM_INFO_PAUSE | 46 SNDRV_PCM_INFO_SYNC_START | 47 SNDRV_PCM_INFO_RESUME 48 ), 49 .formats = ( 50 SNDRV_PCM_FMTBIT_S16_LE 51 ), 52 .rates = ( 53 SNDRV_PCM_RATE_CONTINUOUS | 54 SNDRV_PCM_RATE_8000_48000 55 ), 56 .rate_min = 4000, 57 .rate_max = 48000, 58 .channels_min = 2, 59 .channels_max = 2, 60 .buffer_bytes_max = (128*1024), 61 .period_bytes_min = 64, 62 .period_bytes_max = (64*1024 - 16), 63 .periods_min = 1, 64 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 65 .fifo_size = 0, 66 }; 67 68 static struct snd_pcm_hardware snd_cs5535audio_capture = 69 { 70 .info = ( 71 SNDRV_PCM_INFO_MMAP | 72 SNDRV_PCM_INFO_INTERLEAVED | 73 SNDRV_PCM_INFO_BLOCK_TRANSFER | 74 SNDRV_PCM_INFO_MMAP_VALID | 75 SNDRV_PCM_INFO_SYNC_START 76 ), 77 .formats = ( 78 SNDRV_PCM_FMTBIT_S16_LE 79 ), 80 .rates = ( 81 SNDRV_PCM_RATE_CONTINUOUS | 82 SNDRV_PCM_RATE_8000_48000 83 ), 84 .rate_min = 4000, 85 .rate_max = 48000, 86 .channels_min = 2, 87 .channels_max = 2, 88 .buffer_bytes_max = (128*1024), 89 .period_bytes_min = 64, 90 .period_bytes_max = (64*1024 - 16), 91 .periods_min = 1, 92 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 93 .fifo_size = 0, 94 }; 95 96 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream) 97 { 98 int err; 99 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 100 struct snd_pcm_runtime *runtime = substream->runtime; 101 102 runtime->hw = snd_cs5535audio_playback; 103 cs5535au->playback_substream = substream; 104 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]); 105 snd_pcm_set_sync(substream); 106 if ((err = snd_pcm_hw_constraint_integer(runtime, 107 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 108 return err; 109 110 return 0; 111 } 112 113 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) 114 { 115 return 0; 116 } 117 118 #define CS5535AUDIO_DESC_LIST_SIZE \ 119 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) 120 121 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, 122 struct cs5535audio_dma *dma, 123 struct snd_pcm_substream *substream, 124 unsigned int periods, 125 unsigned int period_bytes) 126 { 127 unsigned int i; 128 u32 addr, desc_addr, jmpprd_addr; 129 struct cs5535audio_dma_desc *lastdesc; 130 131 if (periods > CS5535AUDIO_MAX_DESCRIPTORS) 132 return -ENOMEM; 133 134 if (dma->desc_buf.area == NULL) { 135 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 136 snd_dma_pci_data(cs5535au->pci), 137 CS5535AUDIO_DESC_LIST_SIZE+1, 138 &dma->desc_buf) < 0) 139 return -ENOMEM; 140 dma->period_bytes = dma->periods = 0; 141 } 142 143 if (dma->periods == periods && dma->period_bytes == period_bytes) 144 return 0; 145 146 /* the u32 cast is okay because in snd*create we successfully told 147 pci alloc that we're only 32 bit capable so the uppper will be 0 */ 148 addr = (u32) substream->runtime->dma_addr; 149 desc_addr = (u32) dma->desc_buf.addr; 150 for (i = 0; i < periods; i++) { 151 struct cs5535audio_dma_desc *desc = 152 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; 153 desc->addr = cpu_to_le32(addr); 154 desc->size = cpu_to_le32(period_bytes); 155 desc->ctlreserved = cpu_to_le32(PRD_EOP); 156 desc_addr += sizeof(struct cs5535audio_dma_desc); 157 addr += period_bytes; 158 } 159 /* we reserved one dummy descriptor at the end to do the PRD jump */ 160 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; 161 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); 162 lastdesc->size = 0; 163 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP); 164 jmpprd_addr = cpu_to_le32(lastdesc->addr + 165 (sizeof(struct cs5535audio_dma_desc)*periods)); 166 167 dma->period_bytes = period_bytes; 168 dma->periods = periods; 169 spin_lock_irq(&cs5535au->reg_lock); 170 dma->ops->disable_dma(cs5535au); 171 dma->ops->setup_prd(cs5535au, jmpprd_addr); 172 spin_unlock_irq(&cs5535au->reg_lock); 173 return 0; 174 } 175 176 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) 177 { 178 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); 179 } 180 181 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) 182 { 183 cs_writeb(cs5535au, ACC_BM0_CMD, 0); 184 } 185 186 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) 187 { 188 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); 189 } 190 191 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, 192 u32 prd_addr) 193 { 194 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); 195 } 196 197 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) 198 { 199 return cs_readl(cs5535au, ACC_BM0_PRD); 200 } 201 202 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) 203 { 204 return cs_readl(cs5535au, ACC_BM0_PNTR); 205 } 206 207 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) 208 { 209 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); 210 } 211 212 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) 213 { 214 cs_writeb(cs5535au, ACC_BM1_CMD, 0); 215 } 216 217 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) 218 { 219 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); 220 } 221 222 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, 223 u32 prd_addr) 224 { 225 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); 226 } 227 228 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) 229 { 230 return cs_readl(cs5535au, ACC_BM1_PRD); 231 } 232 233 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) 234 { 235 return cs_readl(cs5535au, ACC_BM1_PNTR); 236 } 237 238 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, 239 struct cs5535audio_dma *dma, 240 struct snd_pcm_substream *substream) 241 { 242 snd_dma_free_pages(&dma->desc_buf); 243 dma->desc_buf.area = NULL; 244 } 245 246 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, 247 struct snd_pcm_hw_params *hw_params) 248 { 249 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 250 struct cs5535audio_dma *dma = substream->runtime->private_data; 251 int err; 252 253 err = snd_pcm_lib_malloc_pages(substream, 254 params_buffer_bytes(hw_params)); 255 if (err < 0) 256 return err; 257 dma->buf_addr = substream->runtime->dma_addr; 258 dma->buf_bytes = params_buffer_bytes(hw_params); 259 260 err = cs5535audio_build_dma_packets(cs5535au, dma, substream, 261 params_periods(hw_params), 262 params_period_bytes(hw_params)); 263 return err; 264 } 265 266 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) 267 { 268 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 269 struct cs5535audio_dma *dma = substream->runtime->private_data; 270 271 cs5535audio_clear_dma_packets(cs5535au, dma, substream); 272 return snd_pcm_lib_free_pages(substream); 273 } 274 275 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) 276 { 277 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 278 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, 279 substream->runtime->rate); 280 } 281 282 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) 283 { 284 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 285 struct cs5535audio_dma *dma = substream->runtime->private_data; 286 int err = 0; 287 288 spin_lock(&cs5535au->reg_lock); 289 switch (cmd) { 290 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 291 dma->ops->pause_dma(cs5535au); 292 break; 293 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 294 dma->ops->enable_dma(cs5535au); 295 break; 296 case SNDRV_PCM_TRIGGER_START: 297 dma->ops->enable_dma(cs5535au); 298 break; 299 case SNDRV_PCM_TRIGGER_RESUME: 300 dma->ops->enable_dma(cs5535au); 301 dma->suspended = 0; 302 break; 303 case SNDRV_PCM_TRIGGER_STOP: 304 dma->ops->disable_dma(cs5535au); 305 break; 306 case SNDRV_PCM_TRIGGER_SUSPEND: 307 dma->ops->disable_dma(cs5535au); 308 dma->suspended = 1; 309 break; 310 default: 311 snd_printk(KERN_ERR "unhandled trigger\n"); 312 err = -EINVAL; 313 break; 314 } 315 spin_unlock(&cs5535au->reg_lock); 316 return err; 317 } 318 319 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream 320 *substream) 321 { 322 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 323 u32 curdma; 324 struct cs5535audio_dma *dma; 325 326 dma = substream->runtime->private_data; 327 curdma = dma->ops->read_dma_pntr(cs5535au); 328 if (curdma < dma->buf_addr) { 329 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n", 330 curdma, dma->buf_addr); 331 return 0; 332 } 333 curdma -= dma->buf_addr; 334 if (curdma >= dma->buf_bytes) { 335 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n", 336 curdma, dma->buf_bytes); 337 return 0; 338 } 339 return bytes_to_frames(substream->runtime, curdma); 340 } 341 342 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) 343 { 344 int err; 345 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 346 struct snd_pcm_runtime *runtime = substream->runtime; 347 348 runtime->hw = snd_cs5535audio_capture; 349 cs5535au->capture_substream = substream; 350 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); 351 snd_pcm_set_sync(substream); 352 if ((err = snd_pcm_hw_constraint_integer(runtime, 353 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 354 return err; 355 return 0; 356 } 357 358 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) 359 { 360 return 0; 361 } 362 363 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) 364 { 365 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 366 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, 367 substream->runtime->rate); 368 } 369 370 static struct snd_pcm_ops snd_cs5535audio_playback_ops = { 371 .open = snd_cs5535audio_playback_open, 372 .close = snd_cs5535audio_playback_close, 373 .ioctl = snd_pcm_lib_ioctl, 374 .hw_params = snd_cs5535audio_hw_params, 375 .hw_free = snd_cs5535audio_hw_free, 376 .prepare = snd_cs5535audio_playback_prepare, 377 .trigger = snd_cs5535audio_trigger, 378 .pointer = snd_cs5535audio_pcm_pointer, 379 }; 380 381 static struct snd_pcm_ops snd_cs5535audio_capture_ops = { 382 .open = snd_cs5535audio_capture_open, 383 .close = snd_cs5535audio_capture_close, 384 .ioctl = snd_pcm_lib_ioctl, 385 .hw_params = snd_cs5535audio_hw_params, 386 .hw_free = snd_cs5535audio_hw_free, 387 .prepare = snd_cs5535audio_capture_prepare, 388 .trigger = snd_cs5535audio_trigger, 389 .pointer = snd_cs5535audio_pcm_pointer, 390 }; 391 392 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { 393 .type = CS5535AUDIO_DMA_PLAYBACK, 394 .enable_dma = cs5535audio_playback_enable_dma, 395 .disable_dma = cs5535audio_playback_disable_dma, 396 .setup_prd = cs5535audio_playback_setup_prd, 397 .read_prd = cs5535audio_playback_read_prd, 398 .pause_dma = cs5535audio_playback_pause_dma, 399 .read_dma_pntr = cs5535audio_playback_read_dma_pntr, 400 }; 401 402 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { 403 .type = CS5535AUDIO_DMA_CAPTURE, 404 .enable_dma = cs5535audio_capture_enable_dma, 405 .disable_dma = cs5535audio_capture_disable_dma, 406 .setup_prd = cs5535audio_capture_setup_prd, 407 .read_prd = cs5535audio_capture_read_prd, 408 .pause_dma = cs5535audio_capture_pause_dma, 409 .read_dma_pntr = cs5535audio_capture_read_dma_pntr, 410 }; 411 412 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au) 413 { 414 struct snd_pcm *pcm; 415 int err; 416 417 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); 418 if (err < 0) 419 return err; 420 421 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = 422 &snd_cs5535audio_playback_dma_ops; 423 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = 424 &snd_cs5535audio_capture_dma_ops; 425 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 426 &snd_cs5535audio_playback_ops); 427 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 428 &snd_cs5535audio_capture_ops); 429 430 pcm->private_data = cs5535au; 431 pcm->info_flags = 0; 432 strcpy(pcm->name, "CS5535 Audio"); 433 434 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, 435 snd_dma_pci_data(cs5535au->pci), 436 64*1024, 128*1024); 437 cs5535au->pcm = pcm; 438 439 return 0; 440 } 441 442