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/core.h> 29 #include <sound/control.h> 30 #include <sound/initval.h> 31 #include <sound/asoundef.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/ac97_codec.h> 35 #include "cs5535audio.h" 36 37 static struct snd_pcm_hardware snd_cs5535audio_playback = 38 { 39 .info = ( 40 SNDRV_PCM_INFO_MMAP | 41 SNDRV_PCM_INFO_INTERLEAVED | 42 SNDRV_PCM_INFO_BLOCK_TRANSFER | 43 SNDRV_PCM_INFO_MMAP_VALID | 44 SNDRV_PCM_INFO_PAUSE | 45 SNDRV_PCM_INFO_RESUME 46 ), 47 .formats = ( 48 SNDRV_PCM_FMTBIT_S16_LE 49 ), 50 .rates = ( 51 SNDRV_PCM_RATE_CONTINUOUS | 52 SNDRV_PCM_RATE_8000_48000 53 ), 54 .rate_min = 4000, 55 .rate_max = 48000, 56 .channels_min = 2, 57 .channels_max = 2, 58 .buffer_bytes_max = (128*1024), 59 .period_bytes_min = 64, 60 .period_bytes_max = (64*1024 - 16), 61 .periods_min = 1, 62 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 63 .fifo_size = 0, 64 }; 65 66 static struct snd_pcm_hardware snd_cs5535audio_capture = 67 { 68 .info = ( 69 SNDRV_PCM_INFO_MMAP | 70 SNDRV_PCM_INFO_INTERLEAVED | 71 SNDRV_PCM_INFO_BLOCK_TRANSFER | 72 SNDRV_PCM_INFO_MMAP_VALID 73 ), 74 .formats = ( 75 SNDRV_PCM_FMTBIT_S16_LE 76 ), 77 .rates = ( 78 SNDRV_PCM_RATE_CONTINUOUS | 79 SNDRV_PCM_RATE_8000_48000 80 ), 81 .rate_min = 4000, 82 .rate_max = 48000, 83 .channels_min = 2, 84 .channels_max = 2, 85 .buffer_bytes_max = (128*1024), 86 .period_bytes_min = 64, 87 .period_bytes_max = (64*1024 - 16), 88 .periods_min = 1, 89 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, 90 .fifo_size = 0, 91 }; 92 93 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream) 94 { 95 int err; 96 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 97 struct snd_pcm_runtime *runtime = substream->runtime; 98 99 runtime->hw = snd_cs5535audio_playback; 100 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC]; 101 snd_pcm_limit_hw_rates(runtime); 102 cs5535au->playback_substream = substream; 103 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]); 104 if ((err = snd_pcm_hw_constraint_integer(runtime, 105 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 106 return err; 107 108 return 0; 109 } 110 111 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) 112 { 113 return 0; 114 } 115 116 #define CS5535AUDIO_DESC_LIST_SIZE \ 117 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) 118 119 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, 120 struct cs5535audio_dma *dma, 121 struct snd_pcm_substream *substream, 122 unsigned int periods, 123 unsigned int period_bytes) 124 { 125 unsigned int i; 126 u32 addr, desc_addr, jmpprd_addr; 127 struct cs5535audio_dma_desc *lastdesc; 128 129 if (periods > CS5535AUDIO_MAX_DESCRIPTORS) 130 return -ENOMEM; 131 132 if (dma->desc_buf.area == NULL) { 133 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 134 snd_dma_pci_data(cs5535au->pci), 135 CS5535AUDIO_DESC_LIST_SIZE+1, 136 &dma->desc_buf) < 0) 137 return -ENOMEM; 138 dma->period_bytes = dma->periods = 0; 139 } 140 141 if (dma->periods == periods && dma->period_bytes == period_bytes) 142 return 0; 143 144 /* the u32 cast is okay because in snd*create we successfully told 145 pci alloc that we're only 32 bit capable so the uppper will be 0 */ 146 addr = (u32) substream->runtime->dma_addr; 147 desc_addr = (u32) dma->desc_buf.addr; 148 for (i = 0; i < periods; i++) { 149 struct cs5535audio_dma_desc *desc = 150 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; 151 desc->addr = cpu_to_le32(addr); 152 desc->size = cpu_to_le32(period_bytes); 153 desc->ctlreserved = cpu_to_le32(PRD_EOP); 154 desc_addr += sizeof(struct cs5535audio_dma_desc); 155 addr += period_bytes; 156 } 157 /* we reserved one dummy descriptor at the end to do the PRD jump */ 158 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; 159 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); 160 lastdesc->size = 0; 161 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP); 162 jmpprd_addr = cpu_to_le32(lastdesc->addr + 163 (sizeof(struct cs5535audio_dma_desc)*periods)); 164 165 dma->substream = substream; 166 dma->period_bytes = period_bytes; 167 dma->periods = periods; 168 spin_lock_irq(&cs5535au->reg_lock); 169 dma->ops->disable_dma(cs5535au); 170 dma->ops->setup_prd(cs5535au, jmpprd_addr); 171 spin_unlock_irq(&cs5535au->reg_lock); 172 return 0; 173 } 174 175 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) 176 { 177 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); 178 } 179 180 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) 181 { 182 cs_writeb(cs5535au, ACC_BM0_CMD, 0); 183 } 184 185 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) 186 { 187 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); 188 } 189 190 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, 191 u32 prd_addr) 192 { 193 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); 194 } 195 196 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) 197 { 198 return cs_readl(cs5535au, ACC_BM0_PRD); 199 } 200 201 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) 202 { 203 return cs_readl(cs5535au, ACC_BM0_PNTR); 204 } 205 206 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) 207 { 208 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); 209 } 210 211 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) 212 { 213 cs_writeb(cs5535au, ACC_BM1_CMD, 0); 214 } 215 216 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) 217 { 218 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); 219 } 220 221 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, 222 u32 prd_addr) 223 { 224 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); 225 } 226 227 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) 228 { 229 return cs_readl(cs5535au, ACC_BM1_PRD); 230 } 231 232 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) 233 { 234 return cs_readl(cs5535au, ACC_BM1_PNTR); 235 } 236 237 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, 238 struct cs5535audio_dma *dma, 239 struct snd_pcm_substream *substream) 240 { 241 snd_dma_free_pages(&dma->desc_buf); 242 dma->desc_buf.area = NULL; 243 dma->substream = 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 if (!err) 264 dma->pcm_open_flag = 1; 265 266 return err; 267 } 268 269 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) 270 { 271 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 272 struct cs5535audio_dma *dma = substream->runtime->private_data; 273 274 if (dma->pcm_open_flag) { 275 if (substream == cs5535au->playback_substream) 276 snd_ac97_update_power(cs5535au->ac97, 277 AC97_PCM_FRONT_DAC_RATE, 0); 278 else 279 snd_ac97_update_power(cs5535au->ac97, 280 AC97_PCM_LR_ADC_RATE, 0); 281 dma->pcm_open_flag = 0; 282 } 283 cs5535audio_clear_dma_packets(cs5535au, dma, substream); 284 return snd_pcm_lib_free_pages(substream); 285 } 286 287 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) 288 { 289 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 290 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, 291 substream->runtime->rate); 292 } 293 294 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) 295 { 296 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 297 struct cs5535audio_dma *dma = substream->runtime->private_data; 298 int err = 0; 299 300 spin_lock(&cs5535au->reg_lock); 301 switch (cmd) { 302 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 303 dma->ops->pause_dma(cs5535au); 304 break; 305 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 306 dma->ops->enable_dma(cs5535au); 307 break; 308 case SNDRV_PCM_TRIGGER_START: 309 dma->ops->enable_dma(cs5535au); 310 break; 311 case SNDRV_PCM_TRIGGER_RESUME: 312 dma->ops->enable_dma(cs5535au); 313 break; 314 case SNDRV_PCM_TRIGGER_STOP: 315 dma->ops->disable_dma(cs5535au); 316 break; 317 case SNDRV_PCM_TRIGGER_SUSPEND: 318 dma->ops->disable_dma(cs5535au); 319 break; 320 default: 321 snd_printk(KERN_ERR "unhandled trigger\n"); 322 err = -EINVAL; 323 break; 324 } 325 spin_unlock(&cs5535au->reg_lock); 326 return err; 327 } 328 329 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream 330 *substream) 331 { 332 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 333 u32 curdma; 334 struct cs5535audio_dma *dma; 335 336 dma = substream->runtime->private_data; 337 curdma = dma->ops->read_dma_pntr(cs5535au); 338 if (curdma < dma->buf_addr) { 339 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n", 340 curdma, dma->buf_addr); 341 return 0; 342 } 343 curdma -= dma->buf_addr; 344 if (curdma >= dma->buf_bytes) { 345 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n", 346 curdma, dma->buf_bytes); 347 return 0; 348 } 349 return bytes_to_frames(substream->runtime, curdma); 350 } 351 352 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) 353 { 354 int err; 355 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 356 struct snd_pcm_runtime *runtime = substream->runtime; 357 358 runtime->hw = snd_cs5535audio_capture; 359 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC]; 360 snd_pcm_limit_hw_rates(runtime); 361 cs5535au->capture_substream = substream; 362 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); 363 if ((err = snd_pcm_hw_constraint_integer(runtime, 364 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 365 return err; 366 olpc_capture_open(cs5535au->ac97); 367 return 0; 368 } 369 370 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) 371 { 372 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 373 olpc_capture_close(cs5535au->ac97); 374 return 0; 375 } 376 377 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) 378 { 379 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 380 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, 381 substream->runtime->rate); 382 } 383 384 static struct snd_pcm_ops snd_cs5535audio_playback_ops = { 385 .open = snd_cs5535audio_playback_open, 386 .close = snd_cs5535audio_playback_close, 387 .ioctl = snd_pcm_lib_ioctl, 388 .hw_params = snd_cs5535audio_hw_params, 389 .hw_free = snd_cs5535audio_hw_free, 390 .prepare = snd_cs5535audio_playback_prepare, 391 .trigger = snd_cs5535audio_trigger, 392 .pointer = snd_cs5535audio_pcm_pointer, 393 }; 394 395 static struct snd_pcm_ops snd_cs5535audio_capture_ops = { 396 .open = snd_cs5535audio_capture_open, 397 .close = snd_cs5535audio_capture_close, 398 .ioctl = snd_pcm_lib_ioctl, 399 .hw_params = snd_cs5535audio_hw_params, 400 .hw_free = snd_cs5535audio_hw_free, 401 .prepare = snd_cs5535audio_capture_prepare, 402 .trigger = snd_cs5535audio_trigger, 403 .pointer = snd_cs5535audio_pcm_pointer, 404 }; 405 406 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { 407 .type = CS5535AUDIO_DMA_PLAYBACK, 408 .enable_dma = cs5535audio_playback_enable_dma, 409 .disable_dma = cs5535audio_playback_disable_dma, 410 .setup_prd = cs5535audio_playback_setup_prd, 411 .read_prd = cs5535audio_playback_read_prd, 412 .pause_dma = cs5535audio_playback_pause_dma, 413 .read_dma_pntr = cs5535audio_playback_read_dma_pntr, 414 }; 415 416 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { 417 .type = CS5535AUDIO_DMA_CAPTURE, 418 .enable_dma = cs5535audio_capture_enable_dma, 419 .disable_dma = cs5535audio_capture_disable_dma, 420 .setup_prd = cs5535audio_capture_setup_prd, 421 .read_prd = cs5535audio_capture_read_prd, 422 .pause_dma = cs5535audio_capture_pause_dma, 423 .read_dma_pntr = cs5535audio_capture_read_dma_pntr, 424 }; 425 426 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au) 427 { 428 struct snd_pcm *pcm; 429 int err; 430 431 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); 432 if (err < 0) 433 return err; 434 435 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = 436 &snd_cs5535audio_playback_dma_ops; 437 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = 438 &snd_cs5535audio_capture_dma_ops; 439 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 440 &snd_cs5535audio_playback_ops); 441 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 442 &snd_cs5535audio_capture_ops); 443 444 pcm->private_data = cs5535au; 445 pcm->info_flags = 0; 446 strcpy(pcm->name, "CS5535 Audio"); 447 448 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, 449 snd_dma_pci_data(cs5535au->pci), 450 64*1024, 128*1024); 451 cs5535au->pcm = pcm; 452 453 return 0; 454 } 455 456