1/* 2 * Driver for the Conexant CX25821 PCIe bridge 3 * 4 * Copyright (C) 2009 Conexant Systems Inc. 5 * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * 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., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25#include "cx25821-video.h" 26#include "cx25821-audio-upstream.h" 27 28#include <linux/fs.h> 29#include <linux/errno.h> 30#include <linux/kernel.h> 31#include <linux/init.h> 32#include <linux/module.h> 33#include <linux/syscalls.h> 34#include <linux/file.h> 35#include <linux/fcntl.h> 36#include <linux/delay.h> 37#include <linux/slab.h> 38#include <linux/uaccess.h> 39 40MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards"); 41MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>"); 42MODULE_LICENSE("GPL"); 43 44static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF | 45 FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR; 46 47static int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev, 48 const struct sram_channel *ch, 49 unsigned int bpl, u32 risc) 50{ 51 unsigned int i, lines; 52 u32 cdt; 53 54 if (ch->cmds_start == 0) { 55 cx_write(ch->ptr1_reg, 0); 56 cx_write(ch->ptr2_reg, 0); 57 cx_write(ch->cnt2_reg, 0); 58 cx_write(ch->cnt1_reg, 0); 59 return 0; 60 } 61 62 bpl = (bpl + 7) & ~7; /* alignment */ 63 cdt = ch->cdt; 64 lines = ch->fifo_size / bpl; 65 66 if (lines > 3) 67 lines = 3; 68 69 BUG_ON(lines < 2); 70 71 /* write CDT */ 72 for (i = 0; i < lines; i++) { 73 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i); 74 cx_write(cdt + 16 * i + 4, 0); 75 cx_write(cdt + 16 * i + 8, 0); 76 cx_write(cdt + 16 * i + 12, 0); 77 } 78 79 /* write CMDS */ 80 cx_write(ch->cmds_start + 0, risc); 81 82 cx_write(ch->cmds_start + 4, 0); 83 cx_write(ch->cmds_start + 8, cdt); 84 cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW); 85 cx_write(ch->cmds_start + 16, ch->ctrl_start); 86 87 /* IQ size */ 88 cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW); 89 90 for (i = 24; i < 80; i += 4) 91 cx_write(ch->cmds_start + i, 0); 92 93 /* fill registers */ 94 cx_write(ch->ptr1_reg, ch->fifo_start); 95 cx_write(ch->ptr2_reg, cdt); 96 cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW); 97 cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1); 98 99 return 0; 100} 101 102static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev, 103 __le32 *rp, 104 dma_addr_t databuf_phys_addr, 105 unsigned int bpl, 106 int fifo_enable) 107{ 108 unsigned int line; 109 const struct sram_channel *sram_ch = 110 dev->channels[dev->_audio_upstream_channel].sram_channels; 111 int offset = 0; 112 113 /* scan lines */ 114 for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) { 115 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl); 116 *(rp++) = cpu_to_le32(databuf_phys_addr + offset); 117 *(rp++) = cpu_to_le32(0); /* bits 63-32 */ 118 119 /* Check if we need to enable the FIFO 120 * after the first 3 lines. 121 * For the upstream audio channel, 122 * the risc engine will enable the FIFO */ 123 if (fifo_enable && line == 2) { 124 *(rp++) = RISC_WRITECR; 125 *(rp++) = sram_ch->dma_ctl; 126 *(rp++) = sram_ch->fld_aud_fifo_en; 127 *(rp++) = 0x00000020; 128 } 129 130 offset += AUDIO_LINE_SIZE; 131 } 132 133 return rp; 134} 135 136static int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev, 137 struct pci_dev *pci, 138 unsigned int bpl, unsigned int lines) 139{ 140 __le32 *rp; 141 int fifo_enable = 0; 142 int frame = 0, i = 0; 143 int frame_size = AUDIO_DATA_BUF_SZ; 144 int databuf_offset = 0; 145 int risc_flag = RISC_CNT_INC; 146 dma_addr_t risc_phys_jump_addr; 147 148 /* Virtual address of Risc buffer program */ 149 rp = dev->_risc_virt_addr; 150 151 /* sync instruction */ 152 *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE); 153 154 for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) { 155 databuf_offset = frame_size * frame; 156 157 if (frame == 0) { 158 fifo_enable = 1; 159 risc_flag = RISC_CNT_RESET; 160 } else { 161 fifo_enable = 0; 162 risc_flag = RISC_CNT_INC; 163 } 164 165 /* Calculate physical jump address */ 166 if ((frame + 1) == NUM_AUDIO_FRAMES) { 167 risc_phys_jump_addr = 168 dev->_risc_phys_start_addr + 169 RISC_SYNC_INSTRUCTION_SIZE; 170 } else { 171 risc_phys_jump_addr = 172 dev->_risc_phys_start_addr + 173 RISC_SYNC_INSTRUCTION_SIZE + 174 AUDIO_RISC_DMA_BUF_SIZE * (frame + 1); 175 } 176 177 rp = cx25821_risc_field_upstream_audio(dev, rp, 178 dev->_audiodata_buf_phys_addr + databuf_offset, 179 bpl, fifo_enable); 180 181 if (USE_RISC_NOOP_AUDIO) { 182 for (i = 0; i < NUM_NO_OPS; i++) 183 *(rp++) = cpu_to_le32(RISC_NOOP); 184 } 185 186 /* Loop to (Nth)FrameRISC or to Start of Risc program & 187 * generate IRQ */ 188 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag); 189 *(rp++) = cpu_to_le32(risc_phys_jump_addr); 190 *(rp++) = cpu_to_le32(0); 191 192 /* Recalculate virtual address based on frame index */ 193 rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 + 194 (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4); 195 } 196 197 return 0; 198} 199 200static void cx25821_free_memory_audio(struct cx25821_dev *dev) 201{ 202 if (dev->_risc_virt_addr) { 203 pci_free_consistent(dev->pci, dev->_audiorisc_size, 204 dev->_risc_virt_addr, dev->_risc_phys_addr); 205 dev->_risc_virt_addr = NULL; 206 } 207 208 if (dev->_audiodata_buf_virt_addr) { 209 pci_free_consistent(dev->pci, dev->_audiodata_buf_size, 210 dev->_audiodata_buf_virt_addr, 211 dev->_audiodata_buf_phys_addr); 212 dev->_audiodata_buf_virt_addr = NULL; 213 } 214} 215 216void cx25821_stop_upstream_audio(struct cx25821_dev *dev) 217{ 218 const struct sram_channel *sram_ch = 219 dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels; 220 u32 tmp = 0; 221 222 if (!dev->_audio_is_running) { 223 printk(KERN_DEBUG 224 pr_fmt("No audio file is currently running so return!\n")); 225 return; 226 } 227 /* Disable RISC interrupts */ 228 cx_write(sram_ch->int_msk, 0); 229 230 /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */ 231 tmp = cx_read(sram_ch->dma_ctl); 232 cx_write(sram_ch->dma_ctl, 233 tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en)); 234 235 /* Clear data buffer memory */ 236 if (dev->_audiodata_buf_virt_addr) 237 memset(dev->_audiodata_buf_virt_addr, 0, 238 dev->_audiodata_buf_size); 239 240 dev->_audio_is_running = 0; 241 dev->_is_first_audio_frame = 0; 242 dev->_audioframe_count = 0; 243 dev->_audiofile_status = END_OF_FILE; 244 245 kfree(dev->_irq_audio_queues); 246 dev->_irq_audio_queues = NULL; 247 248 kfree(dev->_audiofilename); 249} 250 251void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev) 252{ 253 if (dev->_audio_is_running) 254 cx25821_stop_upstream_audio(dev); 255 256 cx25821_free_memory_audio(dev); 257} 258 259static int cx25821_get_audio_data(struct cx25821_dev *dev, 260 const struct sram_channel *sram_ch) 261{ 262 struct file *file; 263 int frame_index_temp = dev->_audioframe_index; 264 int i = 0; 265 int frame_size = AUDIO_DATA_BUF_SZ; 266 int frame_offset = frame_size * frame_index_temp; 267 char mybuf[AUDIO_LINE_SIZE]; 268 loff_t file_offset = dev->_audioframe_count * frame_size; 269 char *p = NULL; 270 271 if (dev->_audiofile_status == END_OF_FILE) 272 return 0; 273 274 file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); 275 if (IS_ERR(file)) { 276 pr_err("%s(): ERROR opening file(%s) with errno = %ld!\n", 277 __func__, dev->_audiofilename, -PTR_ERR(file)); 278 return PTR_ERR(file); 279 } 280 281 if (dev->_audiodata_buf_virt_addr) 282 p = (char *)dev->_audiodata_buf_virt_addr + frame_offset; 283 284 for (i = 0; i < dev->_audio_lines_count; i++) { 285 int n = kernel_read(file, file_offset, mybuf, AUDIO_LINE_SIZE); 286 if (n < AUDIO_LINE_SIZE) { 287 pr_info("Done: exit %s() since no more bytes to read from Audio file\n", 288 __func__); 289 dev->_audiofile_status = END_OF_FILE; 290 fput(file); 291 return 0; 292 } 293 dev->_audiofile_status = IN_PROGRESS; 294 if (p) { 295 memcpy(p, mybuf, n); 296 p += n; 297 } 298 file_offset += n; 299 } 300 dev->_audioframe_count++; 301 fput(file); 302 303 return 0; 304} 305 306static void cx25821_audioups_handler(struct work_struct *work) 307{ 308 struct cx25821_dev *dev = container_of(work, struct cx25821_dev, 309 _audio_work_entry); 310 311 if (!dev) { 312 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n", 313 __func__); 314 return; 315 } 316 317 cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel]. 318 sram_channels); 319} 320 321static int cx25821_openfile_audio(struct cx25821_dev *dev, 322 const struct sram_channel *sram_ch) 323{ 324 char *p = (void *)dev->_audiodata_buf_virt_addr; 325 struct file *file; 326 loff_t offset; 327 int i, j; 328 329 file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); 330 if (IS_ERR(file)) { 331 pr_err("%s(): ERROR opening file(%s) with errno = %ld!\n", 332 __func__, dev->_audiofilename, PTR_ERR(file)); 333 return PTR_ERR(file); 334 } 335 336 for (j = 0, offset = 0; j < NUM_AUDIO_FRAMES; j++) { 337 for (i = 0; i < dev->_audio_lines_count; i++) { 338 char buf[AUDIO_LINE_SIZE]; 339 int n = kernel_read(file, offset, buf, 340 AUDIO_LINE_SIZE); 341 342 if (n < AUDIO_LINE_SIZE) { 343 pr_info("Done: exit %s() since no more bytes to read from Audio file\n", 344 __func__); 345 dev->_audiofile_status = END_OF_FILE; 346 fput(file); 347 return 0; 348 } 349 350 if (p) 351 memcpy(p + offset, buf, n); 352 353 offset += n; 354 } 355 dev->_audioframe_count++; 356 } 357 dev->_audiofile_status = IN_PROGRESS; 358 fput(file); 359 return 0; 360} 361 362static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev, 363 const struct sram_channel *sram_ch, 364 int bpl) 365{ 366 int ret = 0; 367 dma_addr_t dma_addr; 368 dma_addr_t data_dma_addr; 369 370 cx25821_free_memory_audio(dev); 371 372 dev->_risc_virt_addr = pci_alloc_consistent(dev->pci, 373 dev->audio_upstream_riscbuf_size, &dma_addr); 374 dev->_risc_virt_start_addr = dev->_risc_virt_addr; 375 dev->_risc_phys_start_addr = dma_addr; 376 dev->_risc_phys_addr = dma_addr; 377 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size; 378 379 if (!dev->_risc_virt_addr) { 380 printk(KERN_DEBUG 381 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n")); 382 return -ENOMEM; 383 } 384 /* Clear out memory at address */ 385 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size); 386 387 /* For Audio Data buffer allocation */ 388 dev->_audiodata_buf_virt_addr = pci_alloc_consistent(dev->pci, 389 dev->audio_upstream_databuf_size, &data_dma_addr); 390 dev->_audiodata_buf_phys_addr = data_dma_addr; 391 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size; 392 393 if (!dev->_audiodata_buf_virt_addr) { 394 printk(KERN_DEBUG 395 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n")); 396 return -ENOMEM; 397 } 398 /* Clear out memory at address */ 399 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size); 400 401 ret = cx25821_openfile_audio(dev, sram_ch); 402 if (ret < 0) 403 return ret; 404 405 /* Creating RISC programs */ 406 ret = cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl, 407 dev->_audio_lines_count); 408 if (ret < 0) { 409 printk(KERN_DEBUG 410 pr_fmt("ERROR creating audio upstream RISC programs!\n")); 411 goto error; 412 } 413 414 return 0; 415 416error: 417 return ret; 418} 419 420static int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num, 421 u32 status) 422{ 423 int i = 0; 424 u32 int_msk_tmp; 425 const struct sram_channel *channel = dev->channels[chan_num].sram_channels; 426 dma_addr_t risc_phys_jump_addr; 427 __le32 *rp; 428 429 if (status & FLD_AUD_SRC_RISCI1) { 430 /* Get interrupt_index of the program that interrupted */ 431 u32 prog_cnt = cx_read(channel->gpcnt); 432 433 /* Since we've identified our IRQ, clear our bits from the 434 * interrupt mask and interrupt status registers */ 435 cx_write(channel->int_msk, 0); 436 cx_write(channel->int_stat, cx_read(channel->int_stat)); 437 438 spin_lock(&dev->slock); 439 440 while (prog_cnt != dev->_last_index_irq) { 441 /* Update _last_index_irq */ 442 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1)) 443 dev->_last_index_irq++; 444 else 445 dev->_last_index_irq = 0; 446 447 dev->_audioframe_index = dev->_last_index_irq; 448 449 queue_work(dev->_irq_audio_queues, 450 &dev->_audio_work_entry); 451 } 452 453 if (dev->_is_first_audio_frame) { 454 dev->_is_first_audio_frame = 0; 455 456 if (dev->_risc_virt_start_addr != NULL) { 457 risc_phys_jump_addr = 458 dev->_risc_phys_start_addr + 459 RISC_SYNC_INSTRUCTION_SIZE + 460 AUDIO_RISC_DMA_BUF_SIZE; 461 462 rp = cx25821_risc_field_upstream_audio(dev, 463 dev->_risc_virt_start_addr + 1, 464 dev->_audiodata_buf_phys_addr, 465 AUDIO_LINE_SIZE, FIFO_DISABLE); 466 467 if (USE_RISC_NOOP_AUDIO) { 468 for (i = 0; i < NUM_NO_OPS; i++) { 469 *(rp++) = 470 cpu_to_le32(RISC_NOOP); 471 } 472 } 473 /* Jump to 2nd Audio Frame */ 474 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | 475 RISC_CNT_RESET); 476 *(rp++) = cpu_to_le32(risc_phys_jump_addr); 477 *(rp++) = cpu_to_le32(0); 478 } 479 } 480 481 spin_unlock(&dev->slock); 482 } else { 483 if (status & FLD_AUD_SRC_OF) 484 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n", 485 __func__); 486 487 if (status & FLD_AUD_SRC_SYNC) 488 pr_warn("%s(): Audio Received Sync Error Interrupt!\n", 489 __func__); 490 491 if (status & FLD_AUD_SRC_OPC_ERR) 492 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n", 493 __func__); 494 495 /* Read and write back the interrupt status register to clear 496 * our bits */ 497 cx_write(channel->int_stat, cx_read(channel->int_stat)); 498 } 499 500 if (dev->_audiofile_status == END_OF_FILE) { 501 pr_warn("EOF Channel Audio Framecount = %d\n", 502 dev->_audioframe_count); 503 return -1; 504 } 505 /* ElSE, set the interrupt mask register, re-enable irq. */ 506 int_msk_tmp = cx_read(channel->int_msk); 507 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk); 508 509 return 0; 510} 511 512static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id) 513{ 514 struct cx25821_dev *dev = dev_id; 515 u32 audio_status; 516 int handled = 0; 517 const struct sram_channel *sram_ch; 518 519 if (!dev) 520 return -1; 521 522 sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels; 523 524 audio_status = cx_read(sram_ch->int_stat); 525 526 /* Only deal with our interrupt */ 527 if (audio_status) { 528 handled = cx25821_audio_upstream_irq(dev, 529 dev->_audio_upstream_channel, audio_status); 530 } 531 532 if (handled < 0) 533 cx25821_stop_upstream_audio(dev); 534 else 535 handled += handled; 536 537 return IRQ_RETVAL(handled); 538} 539 540static void cx25821_wait_fifo_enable(struct cx25821_dev *dev, 541 const struct sram_channel *sram_ch) 542{ 543 int count = 0; 544 u32 tmp; 545 546 do { 547 /* Wait 10 microsecond before checking to see if the FIFO is 548 * turned ON. */ 549 udelay(10); 550 551 tmp = cx_read(sram_ch->dma_ctl); 552 553 /* 10 millisecond timeout */ 554 if (count++ > 1000) { 555 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n", 556 __func__); 557 return; 558 } 559 560 } while (!(tmp & sram_ch->fld_aud_fifo_en)); 561 562} 563 564static int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev, 565 const struct sram_channel *sram_ch) 566{ 567 u32 tmp = 0; 568 int err = 0; 569 570 /* Set the physical start address of the RISC program in the initial 571 * program counter(IPC) member of the CMDS. */ 572 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr); 573 /* Risc IPC High 64 bits 63-32 */ 574 cx_write(sram_ch->cmds_start + 4, 0); 575 576 /* reset counter */ 577 cx_write(sram_ch->gpcnt_ctl, 3); 578 579 /* Set the line length (It looks like we do not need to set the 580 * line length) */ 581 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH); 582 583 /* Set the input mode to 16-bit */ 584 tmp = cx_read(sram_ch->aud_cfg); 585 tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE | 586 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | 587 FLD_AUD_SONY_MODE; 588 cx_write(sram_ch->aud_cfg, tmp); 589 590 /* Read and write back the interrupt status register to clear it */ 591 tmp = cx_read(sram_ch->int_stat); 592 cx_write(sram_ch->int_stat, tmp); 593 594 /* Clear our bits from the interrupt status register. */ 595 cx_write(sram_ch->int_stat, _intr_msk); 596 597 /* Set the interrupt mask register, enable irq. */ 598 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit)); 599 tmp = cx_read(sram_ch->int_msk); 600 cx_write(sram_ch->int_msk, tmp |= _intr_msk); 601 602 err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio, 603 IRQF_SHARED, dev->name, dev); 604 if (err < 0) { 605 pr_err("%s: can't get upstream IRQ %d\n", dev->name, 606 dev->pci->irq); 607 goto fail_irq; 608 } 609 610 /* Start the DMA engine */ 611 tmp = cx_read(sram_ch->dma_ctl); 612 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en); 613 614 dev->_audio_is_running = 1; 615 dev->_is_first_audio_frame = 1; 616 617 /* The fifo_en bit turns on by the first Risc program */ 618 cx25821_wait_fifo_enable(dev, sram_ch); 619 620 return 0; 621 622fail_irq: 623 cx25821_dev_unregister(dev); 624 return err; 625} 626 627int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select) 628{ 629 const struct sram_channel *sram_ch; 630 int err = 0; 631 632 if (dev->_audio_is_running) { 633 pr_warn("Audio Channel is still running so return!\n"); 634 return 0; 635 } 636 637 dev->_audio_upstream_channel = channel_select; 638 sram_ch = dev->channels[channel_select].sram_channels; 639 640 /* Work queue */ 641 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler); 642 dev->_irq_audio_queues = 643 create_singlethread_workqueue("cx25821_audioworkqueue"); 644 645 if (!dev->_irq_audio_queues) { 646 printk(KERN_DEBUG 647 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n")); 648 return -ENOMEM; 649 } 650 651 dev->_last_index_irq = 0; 652 dev->_audio_is_running = 0; 653 dev->_audioframe_count = 0; 654 dev->_audiofile_status = RESET_STATUS; 655 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER; 656 _line_size = AUDIO_LINE_SIZE; 657 658 if ((dev->input_audiofilename) && 659 (strcmp(dev->input_audiofilename, "") != 0)) 660 dev->_audiofilename = kstrdup(dev->input_audiofilename, 661 GFP_KERNEL); 662 else 663 dev->_audiofilename = kstrdup(_defaultAudioName, 664 GFP_KERNEL); 665 666 if (!dev->_audiofilename) { 667 err = -ENOMEM; 668 goto error; 669 } 670 671 cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, 672 _line_size, 0); 673 674 dev->audio_upstream_riscbuf_size = 675 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS + 676 RISC_SYNC_INSTRUCTION_SIZE; 677 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS; 678 679 /* Allocating buffers and prepare RISC program */ 680 err = cx25821_audio_upstream_buffer_prepare(dev, sram_ch, 681 _line_size); 682 if (err < 0) { 683 pr_err("%s: Failed to set up Audio upstream buffers!\n", 684 dev->name); 685 goto error; 686 } 687 /* Start RISC engine */ 688 cx25821_start_audio_dma_upstream(dev, sram_ch); 689 690 return 0; 691 692error: 693 cx25821_dev_unregister(dev); 694 695 return err; 696} 697