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