1/* arch/arm/mach-msm/audio_evrc.c 2 * 3 * Copyright (c) 2008 QUALCOMM USA, INC. 4 * 5 * This code also borrows from audio_aac.c, which is 6 * Copyright (C) 2008 Google, Inc. 7 * Copyright (C) 2008 HTC Corporation 8 * 9 * This software is licensed under the terms of the GNU General Public 10 * License version 2, as published by the Free Software Foundation, and 11 * may be copied, distributed, and modified under those terms. 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. 16 * 17 * See the GNU General Public License for more details. 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, you can find it at http://www.fsf.org. 20 */ 21 22#include <linux/module.h> 23#include <linux/fs.h> 24#include <linux/miscdevice.h> 25#include <linux/uaccess.h> 26#include <linux/kthread.h> 27#include <linux/wait.h> 28#include <linux/dma-mapping.h> 29#include <linux/delay.h> 30#include <linux/gfp.h> 31 32#include <asm/atomic.h> 33#include <asm/ioctls.h> 34#include <mach/msm_adsp.h> 35#include <linux/msm_audio.h> 36#include "audmgr.h" 37 38#include <mach/qdsp5/qdsp5audppcmdi.h> 39#include <mach/qdsp5/qdsp5audppmsg.h> 40#include <mach/qdsp5/qdsp5audplaycmdi.h> 41#include <mach/qdsp5/qdsp5audplaymsg.h> 42 43#include "adsp.h" 44 45#ifdef DEBUG 46#define dprintk(format, arg...) \ 47 printk(KERN_DEBUG format, ## arg) 48#else 49#define dprintk(format, arg...) do {} while (0) 50#endif 51 52/* Hold 30 packets of 24 bytes each*/ 53#define BUFSZ 720 54#define DMASZ (BUFSZ * 2) 55 56#define AUDDEC_DEC_EVRC 12 57 58#define PCM_BUFSZ_MIN 1600 /* 100ms worth of data */ 59#define PCM_BUF_MAX_COUNT 5 60/* DSP only accepts 5 buffers at most 61 * but support 2 buffers currently 62 */ 63#define EVRC_DECODED_FRSZ 320 /* EVRC 20ms 8KHz mono PCM size */ 64 65#define ROUTING_MODE_FTRT 1 66#define ROUTING_MODE_RT 2 67/* Decoder status received from AUDPPTASK */ 68#define AUDPP_DEC_STATUS_SLEEP 0 69#define AUDPP_DEC_STATUS_INIT 1 70#define AUDPP_DEC_STATUS_CFG 2 71#define AUDPP_DEC_STATUS_PLAY 3 72 73struct buffer { 74 void *data; 75 unsigned size; 76 unsigned used; /* Input usage actual DSP produced PCM size */ 77 unsigned addr; 78}; 79 80struct audio { 81 struct buffer out[2]; 82 83 spinlock_t dsp_lock; 84 85 uint8_t out_head; 86 uint8_t out_tail; 87 uint8_t out_needed; /* number of buffers the dsp is waiting for */ 88 89 atomic_t out_bytes; 90 91 struct mutex lock; 92 struct mutex write_lock; 93 wait_queue_head_t write_wait; 94 95 /* Host PCM section */ 96 struct buffer in[PCM_BUF_MAX_COUNT]; 97 struct mutex read_lock; 98 wait_queue_head_t read_wait; /* Wait queue for read */ 99 char *read_data; /* pointer to reader buffer */ 100 dma_addr_t read_phys; /* physical address of reader buffer */ 101 uint8_t read_next; /* index to input buffers to be read next */ 102 uint8_t fill_next; /* index to buffer that DSP should be filling */ 103 uint8_t pcm_buf_count; /* number of pcm buffer allocated */ 104 /* ---- End of Host PCM section */ 105 106 struct msm_adsp_module *audplay; 107 struct audmgr audmgr; 108 109 /* data allocated for various buffers */ 110 char *data; 111 dma_addr_t phys; 112 113 uint8_t opened:1; 114 uint8_t enabled:1; 115 uint8_t running:1; 116 uint8_t stopped:1; /* set when stopped, cleared on flush */ 117 uint8_t pcm_feedback:1; 118 uint8_t buf_refresh:1; 119 120 unsigned volume; 121 uint16_t dec_id; 122 uint32_t read_ptr_offset; 123}; 124static struct audio the_evrc_audio; 125 126static int auddec_dsp_config(struct audio *audio, int enable); 127static void audpp_cmd_cfg_adec_params(struct audio *audio); 128static void audpp_cmd_cfg_routing_mode(struct audio *audio); 129static void audevrc_send_data(struct audio *audio, unsigned needed); 130static void audevrc_dsp_event(void *private, unsigned id, uint16_t *msg); 131static void audevrc_config_hostpcm(struct audio *audio); 132static void audevrc_buffer_refresh(struct audio *audio); 133 134/* must be called with audio->lock held */ 135static int audevrc_enable(struct audio *audio) 136{ 137 struct audmgr_config cfg; 138 int rc; 139 140 if (audio->enabled) 141 return 0; 142 143 audio->out_tail = 0; 144 audio->out_needed = 0; 145 146 cfg.tx_rate = RPC_AUD_DEF_SAMPLE_RATE_NONE; 147 cfg.rx_rate = RPC_AUD_DEF_SAMPLE_RATE_48000; 148 cfg.def_method = RPC_AUD_DEF_METHOD_PLAYBACK; 149 cfg.codec = RPC_AUD_DEF_CODEC_EVRC; 150 cfg.snd_method = RPC_SND_METHOD_MIDI; 151 152 rc = audmgr_enable(&audio->audmgr, &cfg); 153 if (rc < 0) 154 return rc; 155 156 if (msm_adsp_enable(audio->audplay)) { 157 pr_err("audio: msm_adsp_enable(audplay) failed\n"); 158 audmgr_disable(&audio->audmgr); 159 return -ENODEV; 160 } 161 162 if (audpp_enable(audio->dec_id, audevrc_dsp_event, audio)) { 163 pr_err("audio: audpp_enable() failed\n"); 164 msm_adsp_disable(audio->audplay); 165 audmgr_disable(&audio->audmgr); 166 return -ENODEV; 167 } 168 audio->enabled = 1; 169 return 0; 170} 171 172/* must be called with audio->lock held */ 173static int audevrc_disable(struct audio *audio) 174{ 175 if (audio->enabled) { 176 audio->enabled = 0; 177 auddec_dsp_config(audio, 0); 178 wake_up(&audio->write_wait); 179 wake_up(&audio->read_wait); 180 msm_adsp_disable(audio->audplay); 181 audpp_disable(audio->dec_id, audio); 182 audmgr_disable(&audio->audmgr); 183 audio->out_needed = 0; 184 } 185 return 0; 186} 187 188/* ------------------- dsp --------------------- */ 189 190static void audevrc_update_pcm_buf_entry(struct audio *audio, 191 uint32_t *payload) 192{ 193 uint8_t index; 194 unsigned long flags; 195 196 spin_lock_irqsave(&audio->dsp_lock, flags); 197 for (index = 0; index < payload[1]; index++) { 198 if (audio->in[audio->fill_next].addr 199 == payload[2 + index * 2]) { 200 dprintk("audevrc_update_pcm_buf_entry: in[%d] ready\n", 201 audio->fill_next); 202 audio->in[audio->fill_next].used = 203 payload[3 + index * 2]; 204 if ((++audio->fill_next) == audio->pcm_buf_count) 205 audio->fill_next = 0; 206 207 } else { 208 pr_err 209 ("audevrc_update_pcm_buf_entry: expected=%x ret=%x\n", 210 audio->in[audio->fill_next].addr, 211 payload[1 + index * 2]); 212 break; 213 } 214 } 215 if (audio->in[audio->fill_next].used == 0) { 216 audevrc_buffer_refresh(audio); 217 } else { 218 dprintk("audevrc_update_pcm_buf_entry: read cannot keep up\n"); 219 audio->buf_refresh = 1; 220 } 221 222 spin_unlock_irqrestore(&audio->dsp_lock, flags); 223 wake_up(&audio->read_wait); 224} 225 226static void audplay_dsp_event(void *data, unsigned id, size_t len, 227 void (*getevent) (void *ptr, size_t len)) 228{ 229 struct audio *audio = data; 230 uint32_t msg[28]; 231 getevent(msg, sizeof(msg)); 232 233 dprintk("audplay_dsp_event: msg_id=%x\n", id); 234 switch (id) { 235 case AUDPLAY_MSG_DEC_NEEDS_DATA: 236 audevrc_send_data(audio, 1); 237 break; 238 case AUDPLAY_MSG_BUFFER_UPDATE: 239 dprintk("audevrc_update_pcm_buf_entry:======> \n"); 240 audevrc_update_pcm_buf_entry(audio, msg); 241 break; 242 default: 243 pr_err("unexpected message from decoder \n"); 244 } 245} 246 247static void audevrc_dsp_event(void *private, unsigned id, uint16_t *msg) 248{ 249 struct audio *audio = private; 250 251 switch (id) { 252 case AUDPP_MSG_STATUS_MSG:{ 253 unsigned status = msg[1]; 254 255 switch (status) { 256 case AUDPP_DEC_STATUS_SLEEP: 257 dprintk("decoder status: sleep \n"); 258 break; 259 260 case AUDPP_DEC_STATUS_INIT: 261 dprintk("decoder status: init \n"); 262 audpp_cmd_cfg_routing_mode(audio); 263 break; 264 265 case AUDPP_DEC_STATUS_CFG: 266 dprintk("decoder status: cfg \n"); 267 break; 268 case AUDPP_DEC_STATUS_PLAY: 269 dprintk("decoder status: play \n"); 270 if (audio->pcm_feedback) { 271 audevrc_config_hostpcm(audio); 272 audevrc_buffer_refresh(audio); 273 } 274 break; 275 default: 276 pr_err("unknown decoder status \n"); 277 } 278 break; 279 } 280 case AUDPP_MSG_CFG_MSG: 281 if (msg[0] == AUDPP_MSG_ENA_ENA) { 282 dprintk("audevrc_dsp_event: CFG_MSG ENABLE\n"); 283 auddec_dsp_config(audio, 1); 284 audio->out_needed = 0; 285 audio->running = 1; 286 audpp_set_volume_and_pan(audio->dec_id, audio->volume, 287 0); 288 audpp_avsync(audio->dec_id, 22050); 289 } else if (msg[0] == AUDPP_MSG_ENA_DIS) { 290 dprintk("audevrc_dsp_event: CFG_MSG DISABLE\n"); 291 audpp_avsync(audio->dec_id, 0); 292 audio->running = 0; 293 } else { 294 pr_err("audevrc_dsp_event: CFG_MSG %d?\n", msg[0]); 295 } 296 break; 297 case AUDPP_MSG_ROUTING_ACK: 298 dprintk("audevrc_dsp_event: ROUTING_ACK\n"); 299 audpp_cmd_cfg_adec_params(audio); 300 break; 301 302 default: 303 pr_err("audevrc_dsp_event: UNKNOWN (%d)\n", id); 304 } 305 306} 307 308struct msm_adsp_ops audplay_adsp_ops_evrc = { 309 .event = audplay_dsp_event, 310}; 311 312#define audplay_send_queue0(audio, cmd, len) \ 313 msm_adsp_write(audio->audplay, QDSP_uPAudPlay0BitStreamCtrlQueue, \ 314 cmd, len) 315 316static int auddec_dsp_config(struct audio *audio, int enable) 317{ 318 audpp_cmd_cfg_dec_type cmd; 319 320 memset(&cmd, 0, sizeof(cmd)); 321 cmd.cmd_id = AUDPP_CMD_CFG_DEC_TYPE; 322 if (enable) 323 cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | 324 AUDPP_CMD_ENA_DEC_V | AUDDEC_DEC_EVRC; 325 else 326 cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | AUDPP_CMD_DIS_DEC_V; 327 328 return audpp_send_queue1(&cmd, sizeof(cmd)); 329} 330 331static void audpp_cmd_cfg_adec_params(struct audio *audio) 332{ 333 struct audpp_cmd_cfg_adec_params_evrc cmd; 334 335 memset(&cmd, 0, sizeof(cmd)); 336 cmd.common.cmd_id = AUDPP_CMD_CFG_ADEC_PARAMS; 337 cmd.common.length = sizeof(cmd); 338 cmd.common.dec_id = audio->dec_id; 339 cmd.common.input_sampling_frequency = 8000; 340 cmd.stereo_cfg = AUDPP_CMD_PCM_INTF_MONO_V; 341 342 audpp_send_queue2(&cmd, sizeof(cmd)); 343} 344 345static void audpp_cmd_cfg_routing_mode(struct audio *audio) 346{ 347 struct audpp_cmd_routing_mode cmd; 348 dprintk("audpp_cmd_cfg_routing_mode()\n"); 349 memset(&cmd, 0, sizeof(cmd)); 350 cmd.cmd_id = AUDPP_CMD_ROUTING_MODE; 351 cmd.object_number = audio->dec_id; 352 if (audio->pcm_feedback) 353 cmd.routing_mode = ROUTING_MODE_FTRT; 354 else 355 cmd.routing_mode = ROUTING_MODE_RT; 356 357 audpp_send_queue1(&cmd, sizeof(cmd)); 358} 359 360static int audplay_dsp_send_data_avail(struct audio *audio, 361 unsigned idx, unsigned len) 362{ 363 audplay_cmd_bitstream_data_avail cmd; 364 365 cmd.cmd_id = AUDPLAY_CMD_BITSTREAM_DATA_AVAIL; 366 cmd.decoder_id = audio->dec_id; 367 cmd.buf_ptr = audio->out[idx].addr; 368 cmd.buf_size = len / 2; 369 cmd.partition_number = 0; 370 return audplay_send_queue0(audio, &cmd, sizeof(cmd)); 371} 372 373static void audevrc_buffer_refresh(struct audio *audio) 374{ 375 struct audplay_cmd_buffer_refresh refresh_cmd; 376 377 refresh_cmd.cmd_id = AUDPLAY_CMD_BUFFER_REFRESH; 378 refresh_cmd.num_buffers = 1; 379 refresh_cmd.buf0_address = audio->in[audio->fill_next].addr; 380 refresh_cmd.buf0_length = audio->in[audio->fill_next].size; 381 382 refresh_cmd.buf_read_count = 0; 383 dprintk("audplay_buffer_fresh: buf0_addr=%x buf0_len=%d\n", 384 refresh_cmd.buf0_address, refresh_cmd.buf0_length); 385 audplay_send_queue0(audio, &refresh_cmd, sizeof(refresh_cmd)); 386} 387 388static void audevrc_config_hostpcm(struct audio *audio) 389{ 390 struct audplay_cmd_hpcm_buf_cfg cfg_cmd; 391 392 dprintk("audevrc_config_hostpcm()\n"); 393 cfg_cmd.cmd_id = AUDPLAY_CMD_HPCM_BUF_CFG; 394 cfg_cmd.max_buffers = 1; 395 cfg_cmd.byte_swap = 0; 396 cfg_cmd.hostpcm_config = (0x8000) | (0x4000); 397 cfg_cmd.feedback_frequency = 1; 398 cfg_cmd.partition_number = 0; 399 audplay_send_queue0(audio, &cfg_cmd, sizeof(cfg_cmd)); 400 401} 402 403static void audevrc_send_data(struct audio *audio, unsigned needed) 404{ 405 struct buffer *frame; 406 unsigned long flags; 407 408 spin_lock_irqsave(&audio->dsp_lock, flags); 409 if (!audio->running) 410 goto done; 411 412 if (needed) { 413 /* We were called from the callback because the DSP 414 * requested more data. Note that the DSP does want 415 * more data, and if a buffer was in-flight, mark it 416 * as available (since the DSP must now be done with 417 * it). 418 */ 419 audio->out_needed = 1; 420 frame = audio->out + audio->out_tail; 421 if (frame->used == 0xffffffff) { 422 dprintk("frame %d free\n", audio->out_tail); 423 frame->used = 0; 424 audio->out_tail ^= 1; 425 wake_up(&audio->write_wait); 426 } 427 } 428 429 if (audio->out_needed) { 430 /* If the DSP currently wants data and we have a 431 * buffer available, we will send it and reset 432 * the needed flag. We'll mark the buffer as in-flight 433 * so that it won't be recycled until the next buffer 434 * is requested 435 */ 436 437 frame = audio->out + audio->out_tail; 438 if (frame->used) { 439 BUG_ON(frame->used == 0xffffffff); 440 dprintk("frame %d busy\n", audio->out_tail); 441 audplay_dsp_send_data_avail(audio, audio->out_tail, 442 frame->used); 443 frame->used = 0xffffffff; 444 audio->out_needed = 0; 445 } 446 } 447done: 448 spin_unlock_irqrestore(&audio->dsp_lock, flags); 449} 450 451/* ------------------- device --------------------- */ 452 453static void audevrc_flush(struct audio *audio) 454{ 455 audio->out[0].used = 0; 456 audio->out[1].used = 0; 457 audio->out_head = 0; 458 audio->out_tail = 0; 459 audio->stopped = 0; 460 atomic_set(&audio->out_bytes, 0); 461} 462 463static void audevrc_flush_pcm_buf(struct audio *audio) 464{ 465 uint8_t index; 466 467 for (index = 0; index < PCM_BUF_MAX_COUNT; index++) 468 audio->in[index].used = 0; 469 470 audio->read_next = 0; 471 audio->fill_next = 0; 472} 473 474static long audevrc_ioctl(struct file *file, unsigned int cmd, 475 unsigned long arg) 476{ 477 struct audio *audio = file->private_data; 478 int rc = 0; 479 480 dprintk("audevrc_ioctl() cmd = %d\n", cmd); 481 482 if (cmd == AUDIO_GET_STATS) { 483 struct msm_audio_stats stats; 484 stats.byte_count = audpp_avsync_byte_count(audio->dec_id); 485 stats.sample_count = audpp_avsync_sample_count(audio->dec_id); 486 if (copy_to_user((void *)arg, &stats, sizeof(stats))) 487 return -EFAULT; 488 return 0; 489 } 490 if (cmd == AUDIO_SET_VOLUME) { 491 unsigned long flags; 492 spin_lock_irqsave(&audio->dsp_lock, flags); 493 audio->volume = arg; 494 if (audio->running) 495 audpp_set_volume_and_pan(audio->dec_id, arg, 0); 496 spin_unlock_irqrestore(&audio->dsp_lock, flags); 497 return 0; 498 } 499 mutex_lock(&audio->lock); 500 switch (cmd) { 501 case AUDIO_START: 502 rc = audevrc_enable(audio); 503 break; 504 case AUDIO_STOP: 505 rc = audevrc_disable(audio); 506 audio->stopped = 1; 507 break; 508 case AUDIO_SET_CONFIG:{ 509 dprintk("AUDIO_SET_CONFIG not applicable \n"); 510 break; 511 } 512 case AUDIO_GET_CONFIG:{ 513 struct msm_audio_config config; 514 config.buffer_size = BUFSZ; 515 config.buffer_count = 2; 516 config.sample_rate = 8000; 517 config.channel_count = 1; 518 config.unused[0] = 0; 519 config.unused[1] = 0; 520 config.unused[2] = 0; 521 config.unused[3] = 0; 522 if (copy_to_user((void *)arg, &config, sizeof(config))) 523 rc = -EFAULT; 524 else 525 rc = 0; 526 break; 527 } 528 case AUDIO_GET_PCM_CONFIG:{ 529 struct msm_audio_pcm_config config; 530 config.pcm_feedback = 0; 531 config.buffer_count = PCM_BUF_MAX_COUNT; 532 config.buffer_size = PCM_BUFSZ_MIN; 533 if (copy_to_user((void *)arg, &config, sizeof(config))) 534 rc = -EFAULT; 535 else 536 rc = 0; 537 break; 538 } 539 case AUDIO_SET_PCM_CONFIG:{ 540 struct msm_audio_pcm_config config; 541 if (copy_from_user 542 (&config, (void *)arg, sizeof(config))) { 543 rc = -EFAULT; 544 break; 545 } 546 if ((config.buffer_count > PCM_BUF_MAX_COUNT) || 547 (config.buffer_count == 1)) 548 config.buffer_count = PCM_BUF_MAX_COUNT; 549 550 if (config.buffer_size < PCM_BUFSZ_MIN) 551 config.buffer_size = PCM_BUFSZ_MIN; 552 553 /* Check if pcm feedback is required */ 554 if ((config.pcm_feedback) && (!audio->read_data)) { 555 dprintk("audevrc_ioctl: allocate PCM buf %d\n", 556 config.buffer_count * 557 config.buffer_size); 558 audio->read_data = 559 dma_alloc_coherent(NULL, 560 config.buffer_size * 561 config.buffer_count, 562 &audio->read_phys, 563 GFP_KERNEL); 564 if (!audio->read_data) { 565 pr_err 566 ("audevrc_ioctl: no mem for pcm buf\n"); 567 rc = -1; 568 } else { 569 uint8_t index; 570 uint32_t offset = 0; 571 audio->pcm_feedback = 1; 572 audio->buf_refresh = 0; 573 audio->pcm_buf_count = 574 config.buffer_count; 575 audio->read_next = 0; 576 audio->fill_next = 0; 577 578 for (index = 0; 579 index < config.buffer_count; 580 index++) { 581 audio->in[index].data = 582 audio->read_data + offset; 583 audio->in[index].addr = 584 audio->read_phys + offset; 585 audio->in[index].size = 586 config.buffer_size; 587 audio->in[index].used = 0; 588 offset += config.buffer_size; 589 } 590 rc = 0; 591 } 592 } else { 593 rc = 0; 594 } 595 break; 596 } 597 case AUDIO_PAUSE: 598 dprintk("%s: AUDIO_PAUSE %ld\n", __func__, arg); 599 rc = audpp_pause(audio->dec_id, (int) arg); 600 break; 601 default: 602 rc = -EINVAL; 603 } 604 mutex_unlock(&audio->lock); 605 return rc; 606} 607 608static ssize_t audevrc_read(struct file *file, char __user *buf, size_t count, 609 loff_t *pos) 610{ 611 struct audio *audio = file->private_data; 612 const char __user *start = buf; 613 int rc = 0; 614 if (!audio->pcm_feedback) { 615 return 0; 616 /* PCM feedback is not enabled. Nothing to read */ 617 } 618 mutex_lock(&audio->read_lock); 619 dprintk("audevrc_read() \n"); 620 while (count > 0) { 621 rc = wait_event_interruptible(audio->read_wait, 622 (audio->in[audio->read_next]. 623 used > 0) || (audio->stopped)); 624 dprintk("audevrc_read() wait terminated \n"); 625 if (rc < 0) 626 break; 627 if (audio->stopped) { 628 rc = -EBUSY; 629 break; 630 } 631 if (count < audio->in[audio->read_next].used) { 632 /* Read must happen in frame boundary. Since driver does 633 * not know frame size, read count must be greater or 634 * equal to size of PCM samples 635 */ 636 dprintk("audevrc_read:read stop - partial frame\n"); 637 break; 638 } else { 639 dprintk("audevrc_read: read from in[%d]\n", 640 audio->read_next); 641 if (copy_to_user 642 (buf, audio->in[audio->read_next].data, 643 audio->in[audio->read_next].used)) { 644 pr_err("audevrc_read: invalid addr %x \n", 645 (unsigned int)buf); 646 rc = -EFAULT; 647 break; 648 } 649 count -= audio->in[audio->read_next].used; 650 buf += audio->in[audio->read_next].used; 651 audio->in[audio->read_next].used = 0; 652 if ((++audio->read_next) == audio->pcm_buf_count) 653 audio->read_next = 0; 654 if (audio->in[audio->read_next].used == 0) 655 break; /* No data ready at this moment 656 * Exit while loop to prevent 657 * output thread sleep too long 658 */ 659 660 } 661 } 662 if (audio->buf_refresh) { 663 audio->buf_refresh = 0; 664 dprintk("audevrc_read: kick start pcm feedback again\n"); 665 audevrc_buffer_refresh(audio); 666 } 667 mutex_unlock(&audio->read_lock); 668 if (buf > start) 669 rc = buf - start; 670 dprintk("audevrc_read: read %d bytes\n", rc); 671 return rc; 672} 673 674static ssize_t audevrc_write(struct file *file, const char __user *buf, 675 size_t count, loff_t *pos) 676{ 677 struct audio *audio = file->private_data; 678 const char __user *start = buf; 679 struct buffer *frame; 680 size_t xfer; 681 int rc = 0; 682 683 if (count & 1) 684 return -EINVAL; 685 mutex_lock(&audio->write_lock); 686 dprintk("audevrc_write() \n"); 687 while (count > 0) { 688 frame = audio->out + audio->out_head; 689 rc = wait_event_interruptible(audio->write_wait, 690 (frame->used == 0) 691 || (audio->stopped)); 692 if (rc < 0) 693 break; 694 if (audio->stopped) { 695 rc = -EBUSY; 696 break; 697 } 698 xfer = (count > frame->size) ? frame->size : count; 699 if (copy_from_user(frame->data, buf, xfer)) { 700 rc = -EFAULT; 701 break; 702 } 703 704 frame->used = xfer; 705 audio->out_head ^= 1; 706 count -= xfer; 707 buf += xfer; 708 709 audevrc_send_data(audio, 0); 710 711 } 712 mutex_unlock(&audio->write_lock); 713 if (buf > start) 714 return buf - start; 715 return rc; 716} 717 718static int audevrc_release(struct inode *inode, struct file *file) 719{ 720 struct audio *audio = file->private_data; 721 722 dprintk("audevrc_release()\n"); 723 724 mutex_lock(&audio->lock); 725 audevrc_disable(audio); 726 audevrc_flush(audio); 727 audevrc_flush_pcm_buf(audio); 728 msm_adsp_put(audio->audplay); 729 audio->audplay = NULL; 730 audio->opened = 0; 731 dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); 732 audio->data = NULL; 733 if (audio->read_data != NULL) { 734 dma_free_coherent(NULL, 735 audio->in[0].size * audio->pcm_buf_count, 736 audio->read_data, audio->read_phys); 737 audio->read_data = NULL; 738 } 739 audio->pcm_feedback = 0; 740 mutex_unlock(&audio->lock); 741 return 0; 742} 743 744static struct audio the_evrc_audio; 745 746static int audevrc_open(struct inode *inode, struct file *file) 747{ 748 struct audio *audio = &the_evrc_audio; 749 int rc; 750 751 if (audio->opened) { 752 pr_err("audio: busy\n"); 753 return -EBUSY; 754 } 755 756 /* Acquire Lock */ 757 mutex_lock(&audio->lock); 758 759 if (!audio->data) { 760 audio->data = dma_alloc_coherent(NULL, DMASZ, 761 &audio->phys, GFP_KERNEL); 762 if (!audio->data) { 763 pr_err("audio: could not allocate DMA buffers\n"); 764 rc = -ENOMEM; 765 goto dma_fail; 766 } 767 } 768 769 rc = audmgr_open(&audio->audmgr); 770 if (rc) 771 goto audmgr_fail; 772 773 rc = msm_adsp_get("AUDPLAY0TASK", &audio->audplay, 774 &audplay_adsp_ops_evrc, audio); 775 if (rc) { 776 pr_err("audio: failed to get audplay0 dsp module\n"); 777 goto adsp_fail; 778 } 779 780 audio->dec_id = 0; 781 782 audio->out[0].data = audio->data + 0; 783 audio->out[0].addr = audio->phys + 0; 784 audio->out[0].size = BUFSZ; 785 786 audio->out[1].data = audio->data + BUFSZ; 787 audio->out[1].addr = audio->phys + BUFSZ; 788 audio->out[1].size = BUFSZ; 789 790 audio->volume = 0x3FFF; 791 792 audevrc_flush(audio); 793 794 audio->opened = 1; 795 file->private_data = audio; 796 797 mutex_unlock(&audio->lock); 798 return rc; 799 800adsp_fail: 801 audmgr_close(&audio->audmgr); 802audmgr_fail: 803 dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); 804dma_fail: 805 mutex_unlock(&audio->lock); 806 return rc; 807} 808 809static struct file_operations audio_evrc_fops = { 810 .owner = THIS_MODULE, 811 .open = audevrc_open, 812 .release = audevrc_release, 813 .read = audevrc_read, 814 .write = audevrc_write, 815 .unlocked_ioctl = audevrc_ioctl, 816}; 817 818struct miscdevice audio_evrc_misc = { 819 .minor = MISC_DYNAMIC_MINOR, 820 .name = "msm_evrc", 821 .fops = &audio_evrc_fops, 822}; 823 824static int __init audevrc_init(void) 825{ 826 mutex_init(&the_evrc_audio.lock); 827 mutex_init(&the_evrc_audio.write_lock); 828 mutex_init(&the_evrc_audio.read_lock); 829 spin_lock_init(&the_evrc_audio.dsp_lock); 830 init_waitqueue_head(&the_evrc_audio.write_wait); 831 init_waitqueue_head(&the_evrc_audio.read_wait); 832 the_evrc_audio.read_data = NULL; 833 return misc_register(&audio_evrc_misc); 834} 835 836static void __exit audevrc_exit(void) 837{ 838 misc_deregister(&audio_evrc_misc); 839} 840 841module_init(audevrc_init); 842module_exit(audevrc_exit); 843 844MODULE_DESCRIPTION("MSM EVRC driver"); 845MODULE_LICENSE("GPL v2"); 846MODULE_AUTHOR("QUALCOMM Inc"); 847