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/pci.h> 27 #include <sound/core.h> 28 #include <sound/control.h> 29 #include <sound/initval.h> 30 #include <sound/asoundef.h> 31 #include <sound/pcm.h> 32 #include <sound/pcm_params.h> 33 #include <sound/ac97_codec.h> 34 #include "cs5535audio.h" 35 36 static struct snd_pcm_hardware snd_cs5535audio_playback = 37 { 38 .info = ( 39 SNDRV_PCM_INFO_MMAP | 40 SNDRV_PCM_INFO_INTERLEAVED | 41 SNDRV_PCM_INFO_BLOCK_TRANSFER | 42 SNDRV_PCM_INFO_MMAP_VALID | 43 SNDRV_PCM_INFO_PAUSE | 44 SNDRV_PCM_INFO_RESUME 45 ), 46 .formats = ( 47 SNDRV_PCM_FMTBIT_S16_LE 48 ), 49 .rates = ( 50 SNDRV_PCM_RATE_CONTINUOUS | 51 SNDRV_PCM_RATE_8000_48000 52 ), 53 .rate_min = 4000, 54 .rate_max = 48000, 55 .channels_min = 2, 56 .channels_max = 2, 57 .buffer_bytes_max = (128*1024), 58 .period_bytes_min = 64, 59 .period_bytes_max = (64*1024 - 16), 60 .periods_min = 1, 61 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 62 .fifo_size = 0, 63 }; 64 65 static struct snd_pcm_hardware snd_cs5535audio_capture = 66 { 67 .info = ( 68 SNDRV_PCM_INFO_MMAP | 69 SNDRV_PCM_INFO_INTERLEAVED | 70 SNDRV_PCM_INFO_BLOCK_TRANSFER | 71 SNDRV_PCM_INFO_MMAP_VALID 72 ), 73 .formats = ( 74 SNDRV_PCM_FMTBIT_S16_LE 75 ), 76 .rates = ( 77 SNDRV_PCM_RATE_CONTINUOUS | 78 SNDRV_PCM_RATE_8000_48000 79 ), 80 .rate_min = 4000, 81 .rate_max = 48000, 82 .channels_min = 2, 83 .channels_max = 2, 84 .buffer_bytes_max = (128*1024), 85 .period_bytes_min = 64, 86 .period_bytes_max = (64*1024 - 16), 87 .periods_min = 1, 88 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 89 .fifo_size = 0, 90 }; 91 92 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream) 93 { 94 int err; 95 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 96 struct snd_pcm_runtime *runtime = substream->runtime; 97 98 runtime->hw = snd_cs5535audio_playback; 99 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC]; 100 snd_pcm_limit_hw_rates(runtime); 101 cs5535au->playback_substream = substream; 102 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]); 103 if ((err = snd_pcm_hw_constraint_integer(runtime, 104 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 105 return err; 106 107 return 0; 108 } 109 110 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) 111 { 112 return 0; 113 } 114 115 #define CS5535AUDIO_DESC_LIST_SIZE \ 116 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) 117 118 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, 119 struct cs5535audio_dma *dma, 120 struct snd_pcm_substream *substream, 121 unsigned int periods, 122 unsigned int period_bytes) 123 { 124 unsigned int i; 125 u32 addr, desc_addr, jmpprd_addr; 126 struct cs5535audio_dma_desc *lastdesc; 127 128 if (periods > CS5535AUDIO_MAX_DESCRIPTORS) 129 return -ENOMEM; 130 131 if (dma->desc_buf.area == NULL) { 132 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 133 snd_dma_pci_data(cs5535au->pci), 134 CS5535AUDIO_DESC_LIST_SIZE+1, 135 &dma->desc_buf) < 0) 136 return -ENOMEM; 137 dma->period_bytes = dma->periods = 0; 138 } 139 140 if (dma->periods == periods && dma->period_bytes == period_bytes) 141 return 0; 142 143 /* the u32 cast is okay because in snd*create we successfully told 144 pci alloc that we're only 32 bit capable so the uppper will be 0 */ 145 addr = (u32) substream->runtime->dma_addr; 146 desc_addr = (u32) dma->desc_buf.addr; 147 for (i = 0; i < periods; i++) { 148 struct cs5535audio_dma_desc *desc = 149 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; 150 desc->addr = cpu_to_le32(addr); 151 desc->size = cpu_to_le32(period_bytes); 152 desc->ctlreserved = cpu_to_le32(PRD_EOP); 153 desc_addr += sizeof(struct cs5535audio_dma_desc); 154 addr += period_bytes; 155 } 156 /* we reserved one dummy descriptor at the end to do the PRD jump */ 157 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; 158 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); 159 lastdesc->size = 0; 160 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP); 161 jmpprd_addr = cpu_to_le32(lastdesc->addr + 162 (sizeof(struct cs5535audio_dma_desc)*periods)); 163 164 dma->substream = substream; 165 dma->period_bytes = period_bytes; 166 dma->periods = periods; 167 spin_lock_irq(&cs5535au->reg_lock); 168 dma->ops->disable_dma(cs5535au); 169 dma->ops->setup_prd(cs5535au, jmpprd_addr); 170 spin_unlock_irq(&cs5535au->reg_lock); 171 return 0; 172 } 173 174 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) 175 { 176 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); 177 } 178 179 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) 180 { 181 cs_writeb(cs5535au, ACC_BM0_CMD, 0); 182 } 183 184 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) 185 { 186 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); 187 } 188 189 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, 190 u32 prd_addr) 191 { 192 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); 193 } 194 195 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) 196 { 197 return cs_readl(cs5535au, ACC_BM0_PRD); 198 } 199 200 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) 201 { 202 return cs_readl(cs5535au, ACC_BM0_PNTR); 203 } 204 205 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) 206 { 207 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); 208 } 209 210 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) 211 { 212 cs_writeb(cs5535au, ACC_BM1_CMD, 0); 213 } 214 215 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) 216 { 217 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); 218 } 219 220 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, 221 u32 prd_addr) 222 { 223 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); 224 } 225 226 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) 227 { 228 return cs_readl(cs5535au, ACC_BM1_PRD); 229 } 230 231 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) 232 { 233 return cs_readl(cs5535au, ACC_BM1_PNTR); 234 } 235 236 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, 237 struct cs5535audio_dma *dma, 238 struct snd_pcm_substream *substream) 239 { 240 snd_dma_free_pages(&dma->desc_buf); 241 dma->desc_buf.area = NULL; 242 dma->substream = NULL; 243 } 244 245 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, 246 struct snd_pcm_hw_params *hw_params) 247 { 248 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 249 struct cs5535audio_dma *dma = substream->runtime->private_data; 250 int err; 251 252 err = snd_pcm_lib_malloc_pages(substream, 253 params_buffer_bytes(hw_params)); 254 if (err < 0) 255 return err; 256 dma->buf_addr = substream->runtime->dma_addr; 257 dma->buf_bytes = params_buffer_bytes(hw_params); 258 259 err = cs5535audio_build_dma_packets(cs5535au, dma, substream, 260 params_periods(hw_params), 261 params_period_bytes(hw_params)); 262 if (!err) 263 dma->pcm_open_flag = 1; 264 265 return err; 266 } 267 268 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) 269 { 270 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 271 struct cs5535audio_dma *dma = substream->runtime->private_data; 272 273 if (dma->pcm_open_flag) { 274 if (substream == cs5535au->playback_substream) 275 snd_ac97_update_power(cs5535au->ac97, 276 AC97_PCM_FRONT_DAC_RATE, 0); 277 else 278 snd_ac97_update_power(cs5535au->ac97, 279 AC97_PCM_LR_ADC_RATE, 0); 280 dma->pcm_open_flag = 0; 281 } 282 cs5535audio_clear_dma_packets(cs5535au, dma, substream); 283 return snd_pcm_lib_free_pages(substream); 284 } 285 286 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) 287 { 288 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 289 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, 290 substream->runtime->rate); 291 } 292 293 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) 294 { 295 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 296 struct cs5535audio_dma *dma = substream->runtime->private_data; 297 int err = 0; 298 299 spin_lock(&cs5535au->reg_lock); 300 switch (cmd) { 301 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 302 dma->ops->pause_dma(cs5535au); 303 break; 304 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 305 dma->ops->enable_dma(cs5535au); 306 break; 307 case SNDRV_PCM_TRIGGER_START: 308 dma->ops->enable_dma(cs5535au); 309 break; 310 case SNDRV_PCM_TRIGGER_RESUME: 311 dma->ops->enable_dma(cs5535au); 312 break; 313 case SNDRV_PCM_TRIGGER_STOP: 314 dma->ops->disable_dma(cs5535au); 315 break; 316 case SNDRV_PCM_TRIGGER_SUSPEND: 317 dma->ops->disable_dma(cs5535au); 318 break; 319 default: 320 snd_printk(KERN_ERR "unhandled trigger\n"); 321 err = -EINVAL; 322 break; 323 } 324 spin_unlock(&cs5535au->reg_lock); 325 return err; 326 } 327 328 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream 329 *substream) 330 { 331 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 332 u32 curdma; 333 struct cs5535audio_dma *dma; 334 335 dma = substream->runtime->private_data; 336 curdma = dma->ops->read_dma_pntr(cs5535au); 337 if (curdma < dma->buf_addr) { 338 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n", 339 curdma, dma->buf_addr); 340 return 0; 341 } 342 curdma -= dma->buf_addr; 343 if (curdma >= dma->buf_bytes) { 344 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n", 345 curdma, dma->buf_bytes); 346 return 0; 347 } 348 return bytes_to_frames(substream->runtime, curdma); 349 } 350 351 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) 352 { 353 int err; 354 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 355 struct snd_pcm_runtime *runtime = substream->runtime; 356 357 runtime->hw = snd_cs5535audio_capture; 358 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC]; 359 snd_pcm_limit_hw_rates(runtime); 360 cs5535au->capture_substream = substream; 361 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); 362 if ((err = snd_pcm_hw_constraint_integer(runtime, 363 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 364 return err; 365 olpc_capture_open(cs5535au->ac97); 366 return 0; 367 } 368 369 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) 370 { 371 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 372 olpc_capture_close(cs5535au->ac97); 373 return 0; 374 } 375 376 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) 377 { 378 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 379 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, 380 substream->runtime->rate); 381 } 382 383 static struct snd_pcm_ops snd_cs5535audio_playback_ops = { 384 .open = snd_cs5535audio_playback_open, 385 .close = snd_cs5535audio_playback_close, 386 .ioctl = snd_pcm_lib_ioctl, 387 .hw_params = snd_cs5535audio_hw_params, 388 .hw_free = snd_cs5535audio_hw_free, 389 .prepare = snd_cs5535audio_playback_prepare, 390 .trigger = snd_cs5535audio_trigger, 391 .pointer = snd_cs5535audio_pcm_pointer, 392 }; 393 394 static struct snd_pcm_ops snd_cs5535audio_capture_ops = { 395 .open = snd_cs5535audio_capture_open, 396 .close = snd_cs5535audio_capture_close, 397 .ioctl = snd_pcm_lib_ioctl, 398 .hw_params = snd_cs5535audio_hw_params, 399 .hw_free = snd_cs5535audio_hw_free, 400 .prepare = snd_cs5535audio_capture_prepare, 401 .trigger = snd_cs5535audio_trigger, 402 .pointer = snd_cs5535audio_pcm_pointer, 403 }; 404 405 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { 406 .type = CS5535AUDIO_DMA_PLAYBACK, 407 .enable_dma = cs5535audio_playback_enable_dma, 408 .disable_dma = cs5535audio_playback_disable_dma, 409 .setup_prd = cs5535audio_playback_setup_prd, 410 .read_prd = cs5535audio_playback_read_prd, 411 .pause_dma = cs5535audio_playback_pause_dma, 412 .read_dma_pntr = cs5535audio_playback_read_dma_pntr, 413 }; 414 415 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { 416 .type = CS5535AUDIO_DMA_CAPTURE, 417 .enable_dma = cs5535audio_capture_enable_dma, 418 .disable_dma = cs5535audio_capture_disable_dma, 419 .setup_prd = cs5535audio_capture_setup_prd, 420 .read_prd = cs5535audio_capture_read_prd, 421 .pause_dma = cs5535audio_capture_pause_dma, 422 .read_dma_pntr = cs5535audio_capture_read_dma_pntr, 423 }; 424 425 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au) 426 { 427 struct snd_pcm *pcm; 428 int err; 429 430 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); 431 if (err < 0) 432 return err; 433 434 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = 435 &snd_cs5535audio_playback_dma_ops; 436 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = 437 &snd_cs5535audio_capture_dma_ops; 438 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 439 &snd_cs5535audio_playback_ops); 440 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 441 &snd_cs5535audio_capture_ops); 442 443 pcm->private_data = cs5535au; 444 pcm->info_flags = 0; 445 strcpy(pcm->name, "CS5535 Audio"); 446 447 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, 448 snd_dma_pci_data(cs5535au->pci), 449 64*1024, 128*1024); 450 cs5535au->pcm = pcm; 451 452 return 0; 453 } 454 455