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 47int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev, 48 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 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 136int 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 200void 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 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 259int cx25821_get_audio_data(struct cx25821_dev *dev, 260 struct sram_channel *sram_ch) 261{ 262 struct file *myfile; 263 int frame_index_temp = dev->_audioframe_index; 264 int i = 0; 265 int line_size = AUDIO_LINE_SIZE; 266 int frame_size = AUDIO_DATA_BUF_SZ; 267 int frame_offset = frame_size * frame_index_temp; 268 ssize_t vfs_read_retval = 0; 269 char mybuf[line_size]; 270 loff_t file_offset = dev->_audioframe_count * frame_size; 271 loff_t pos; 272 mm_segment_t old_fs; 273 274 if (dev->_audiofile_status == END_OF_FILE) 275 return 0; 276 277 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); 278 279 if (IS_ERR(myfile)) { 280 const int open_errno = -PTR_ERR(myfile); 281 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n", 282 __func__, dev->_audiofilename, open_errno); 283 return PTR_ERR(myfile); 284 } else { 285 if (!(myfile->f_op)) { 286 pr_err("%s(): File has no file operations registered!\n", 287 __func__); 288 filp_close(myfile, NULL); 289 return -EIO; 290 } 291 292 if (!myfile->f_op->read) { 293 pr_err("%s(): File has no READ operations registered!\n", 294 __func__); 295 filp_close(myfile, NULL); 296 return -EIO; 297 } 298 299 pos = myfile->f_pos; 300 old_fs = get_fs(); 301 set_fs(KERNEL_DS); 302 303 for (i = 0; i < dev->_audio_lines_count; i++) { 304 pos = file_offset; 305 306 vfs_read_retval = vfs_read(myfile, mybuf, line_size, 307 &pos); 308 309 if (vfs_read_retval > 0 && vfs_read_retval == line_size 310 && dev->_audiodata_buf_virt_addr != NULL) { 311 memcpy((void *)(dev->_audiodata_buf_virt_addr + 312 frame_offset / 4), mybuf, 313 vfs_read_retval); 314 } 315 316 file_offset += vfs_read_retval; 317 frame_offset += vfs_read_retval; 318 319 if (vfs_read_retval < line_size) { 320 pr_info("Done: exit %s() since no more bytes to read from Audio file\n", 321 __func__); 322 break; 323 } 324 } 325 326 if (i > 0) 327 dev->_audioframe_count++; 328 329 dev->_audiofile_status = (vfs_read_retval == line_size) ? 330 IN_PROGRESS : END_OF_FILE; 331 332 set_fs(old_fs); 333 filp_close(myfile, NULL); 334 } 335 336 return 0; 337} 338 339static void cx25821_audioups_handler(struct work_struct *work) 340{ 341 struct cx25821_dev *dev = container_of(work, struct cx25821_dev, 342 _audio_work_entry); 343 344 if (!dev) { 345 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n", 346 __func__); 347 return; 348 } 349 350 cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel]. 351 sram_channels); 352} 353 354int cx25821_openfile_audio(struct cx25821_dev *dev, 355 struct sram_channel *sram_ch) 356{ 357 struct file *myfile; 358 int i = 0, j = 0; 359 int line_size = AUDIO_LINE_SIZE; 360 ssize_t vfs_read_retval = 0; 361 char mybuf[line_size]; 362 loff_t pos; 363 loff_t offset = (unsigned long)0; 364 mm_segment_t old_fs; 365 366 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); 367 368 if (IS_ERR(myfile)) { 369 const int open_errno = -PTR_ERR(myfile); 370 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n", 371 __func__, dev->_audiofilename, open_errno); 372 return PTR_ERR(myfile); 373 } else { 374 if (!(myfile->f_op)) { 375 pr_err("%s(): File has no file operations registered!\n", 376 __func__); 377 filp_close(myfile, NULL); 378 return -EIO; 379 } 380 381 if (!myfile->f_op->read) { 382 pr_err("%s(): File has no READ operations registered!\n", 383 __func__); 384 filp_close(myfile, NULL); 385 return -EIO; 386 } 387 388 pos = myfile->f_pos; 389 old_fs = get_fs(); 390 set_fs(KERNEL_DS); 391 392 for (j = 0; j < NUM_AUDIO_FRAMES; j++) { 393 for (i = 0; i < dev->_audio_lines_count; i++) { 394 pos = offset; 395 396 vfs_read_retval = vfs_read(myfile, mybuf, 397 line_size, &pos); 398 399 if (vfs_read_retval > 0 && 400 vfs_read_retval == line_size && 401 dev->_audiodata_buf_virt_addr != NULL) { 402 memcpy((void *)(dev-> 403 _audiodata_buf_virt_addr 404 + offset / 4), mybuf, 405 vfs_read_retval); 406 } 407 408 offset += vfs_read_retval; 409 410 if (vfs_read_retval < line_size) { 411 pr_info("Done: exit %s() since no more bytes to read from Audio file\n", 412 __func__); 413 break; 414 } 415 } 416 417 if (i > 0) 418 dev->_audioframe_count++; 419 420 if (vfs_read_retval < line_size) 421 break; 422 } 423 424 dev->_audiofile_status = (vfs_read_retval == line_size) ? 425 IN_PROGRESS : END_OF_FILE; 426 427 set_fs(old_fs); 428 myfile->f_pos = 0; 429 filp_close(myfile, NULL); 430 } 431 432 return 0; 433} 434 435static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev, 436 struct sram_channel *sram_ch, 437 int bpl) 438{ 439 int ret = 0; 440 dma_addr_t dma_addr; 441 dma_addr_t data_dma_addr; 442 443 cx25821_free_memory_audio(dev); 444 445 dev->_risc_virt_addr = pci_alloc_consistent(dev->pci, 446 dev->audio_upstream_riscbuf_size, &dma_addr); 447 dev->_risc_virt_start_addr = dev->_risc_virt_addr; 448 dev->_risc_phys_start_addr = dma_addr; 449 dev->_risc_phys_addr = dma_addr; 450 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size; 451 452 if (!dev->_risc_virt_addr) { 453 printk(KERN_DEBUG 454 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n")); 455 return -ENOMEM; 456 } 457 /* Clear out memory at address */ 458 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size); 459 460 /* For Audio Data buffer allocation */ 461 dev->_audiodata_buf_virt_addr = pci_alloc_consistent(dev->pci, 462 dev->audio_upstream_databuf_size, &data_dma_addr); 463 dev->_audiodata_buf_phys_addr = data_dma_addr; 464 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size; 465 466 if (!dev->_audiodata_buf_virt_addr) { 467 printk(KERN_DEBUG 468 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n")); 469 return -ENOMEM; 470 } 471 /* Clear out memory at address */ 472 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size); 473 474 ret = cx25821_openfile_audio(dev, sram_ch); 475 if (ret < 0) 476 return ret; 477 478 /* Creating RISC programs */ 479 ret = cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl, 480 dev->_audio_lines_count); 481 if (ret < 0) { 482 printk(KERN_DEBUG 483 pr_fmt("ERROR creating audio upstream RISC programs!\n")); 484 goto error; 485 } 486 487 return 0; 488 489error: 490 return ret; 491} 492 493int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num, 494 u32 status) 495{ 496 int i = 0; 497 u32 int_msk_tmp; 498 struct sram_channel *channel = dev->channels[chan_num].sram_channels; 499 dma_addr_t risc_phys_jump_addr; 500 __le32 *rp; 501 502 if (status & FLD_AUD_SRC_RISCI1) { 503 /* Get interrupt_index of the program that interrupted */ 504 u32 prog_cnt = cx_read(channel->gpcnt); 505 506 /* Since we've identified our IRQ, clear our bits from the 507 * interrupt mask and interrupt status registers */ 508 cx_write(channel->int_msk, 0); 509 cx_write(channel->int_stat, cx_read(channel->int_stat)); 510 511 spin_lock(&dev->slock); 512 513 while (prog_cnt != dev->_last_index_irq) { 514 /* Update _last_index_irq */ 515 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1)) 516 dev->_last_index_irq++; 517 else 518 dev->_last_index_irq = 0; 519 520 dev->_audioframe_index = dev->_last_index_irq; 521 522 queue_work(dev->_irq_audio_queues, 523 &dev->_audio_work_entry); 524 } 525 526 if (dev->_is_first_audio_frame) { 527 dev->_is_first_audio_frame = 0; 528 529 if (dev->_risc_virt_start_addr != NULL) { 530 risc_phys_jump_addr = 531 dev->_risc_phys_start_addr + 532 RISC_SYNC_INSTRUCTION_SIZE + 533 AUDIO_RISC_DMA_BUF_SIZE; 534 535 rp = cx25821_risc_field_upstream_audio(dev, 536 dev->_risc_virt_start_addr + 1, 537 dev->_audiodata_buf_phys_addr, 538 AUDIO_LINE_SIZE, FIFO_DISABLE); 539 540 if (USE_RISC_NOOP_AUDIO) { 541 for (i = 0; i < NUM_NO_OPS; i++) { 542 *(rp++) = 543 cpu_to_le32(RISC_NOOP); 544 } 545 } 546 /* Jump to 2nd Audio Frame */ 547 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | 548 RISC_CNT_RESET); 549 *(rp++) = cpu_to_le32(risc_phys_jump_addr); 550 *(rp++) = cpu_to_le32(0); 551 } 552 } 553 554 spin_unlock(&dev->slock); 555 } else { 556 if (status & FLD_AUD_SRC_OF) 557 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n", 558 __func__); 559 560 if (status & FLD_AUD_SRC_SYNC) 561 pr_warn("%s(): Audio Received Sync Error Interrupt!\n", 562 __func__); 563 564 if (status & FLD_AUD_SRC_OPC_ERR) 565 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n", 566 __func__); 567 568 /* Read and write back the interrupt status register to clear 569 * our bits */ 570 cx_write(channel->int_stat, cx_read(channel->int_stat)); 571 } 572 573 if (dev->_audiofile_status == END_OF_FILE) { 574 pr_warn("EOF Channel Audio Framecount = %d\n", 575 dev->_audioframe_count); 576 return -1; 577 } 578 /* ElSE, set the interrupt mask register, re-enable irq. */ 579 int_msk_tmp = cx_read(channel->int_msk); 580 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk); 581 582 return 0; 583} 584 585static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id) 586{ 587 struct cx25821_dev *dev = dev_id; 588 u32 msk_stat, audio_status; 589 int handled = 0; 590 struct sram_channel *sram_ch; 591 592 if (!dev) 593 return -1; 594 595 sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels; 596 597 msk_stat = cx_read(sram_ch->int_mstat); 598 audio_status = cx_read(sram_ch->int_stat); 599 600 /* Only deal with our interrupt */ 601 if (audio_status) { 602 handled = cx25821_audio_upstream_irq(dev, 603 dev->_audio_upstream_channel, audio_status); 604 } 605 606 if (handled < 0) 607 cx25821_stop_upstream_audio(dev); 608 else 609 handled += handled; 610 611 return IRQ_RETVAL(handled); 612} 613 614static void cx25821_wait_fifo_enable(struct cx25821_dev *dev, 615 struct sram_channel *sram_ch) 616{ 617 int count = 0; 618 u32 tmp; 619 620 do { 621 /* Wait 10 microsecond before checking to see if the FIFO is 622 * turned ON. */ 623 udelay(10); 624 625 tmp = cx_read(sram_ch->dma_ctl); 626 627 /* 10 millisecond timeout */ 628 if (count++ > 1000) { 629 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n", 630 __func__); 631 return; 632 } 633 634 } while (!(tmp & sram_ch->fld_aud_fifo_en)); 635 636} 637 638int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev, 639 struct sram_channel *sram_ch) 640{ 641 u32 tmp = 0; 642 int err = 0; 643 644 /* Set the physical start address of the RISC program in the initial 645 * program counter(IPC) member of the CMDS. */ 646 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr); 647 /* Risc IPC High 64 bits 63-32 */ 648 cx_write(sram_ch->cmds_start + 4, 0); 649 650 /* reset counter */ 651 cx_write(sram_ch->gpcnt_ctl, 3); 652 653 /* Set the line length (It looks like we do not need to set the 654 * line length) */ 655 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH); 656 657 /* Set the input mode to 16-bit */ 658 tmp = cx_read(sram_ch->aud_cfg); 659 tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE | 660 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | 661 FLD_AUD_SONY_MODE; 662 cx_write(sram_ch->aud_cfg, tmp); 663 664 /* Read and write back the interrupt status register to clear it */ 665 tmp = cx_read(sram_ch->int_stat); 666 cx_write(sram_ch->int_stat, tmp); 667 668 /* Clear our bits from the interrupt status register. */ 669 cx_write(sram_ch->int_stat, _intr_msk); 670 671 /* Set the interrupt mask register, enable irq. */ 672 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit)); 673 tmp = cx_read(sram_ch->int_msk); 674 cx_write(sram_ch->int_msk, tmp |= _intr_msk); 675 676 err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio, 677 IRQF_SHARED, dev->name, dev); 678 if (err < 0) { 679 pr_err("%s: can't get upstream IRQ %d\n", dev->name, 680 dev->pci->irq); 681 goto fail_irq; 682 } 683 684 /* Start the DMA engine */ 685 tmp = cx_read(sram_ch->dma_ctl); 686 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en); 687 688 dev->_audio_is_running = 1; 689 dev->_is_first_audio_frame = 1; 690 691 /* The fifo_en bit turns on by the first Risc program */ 692 cx25821_wait_fifo_enable(dev, sram_ch); 693 694 return 0; 695 696fail_irq: 697 cx25821_dev_unregister(dev); 698 return err; 699} 700 701int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select) 702{ 703 struct sram_channel *sram_ch; 704 int retval = 0; 705 int err = 0; 706 int str_length = 0; 707 708 if (dev->_audio_is_running) { 709 pr_warn("Audio Channel is still running so return!\n"); 710 return 0; 711 } 712 713 dev->_audio_upstream_channel = channel_select; 714 sram_ch = dev->channels[channel_select].sram_channels; 715 716 /* Work queue */ 717 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler); 718 dev->_irq_audio_queues = 719 create_singlethread_workqueue("cx25821_audioworkqueue"); 720 721 if (!dev->_irq_audio_queues) { 722 printk(KERN_DEBUG 723 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n")); 724 return -ENOMEM; 725 } 726 727 dev->_last_index_irq = 0; 728 dev->_audio_is_running = 0; 729 dev->_audioframe_count = 0; 730 dev->_audiofile_status = RESET_STATUS; 731 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER; 732 _line_size = AUDIO_LINE_SIZE; 733 734 if (dev->input_audiofilename) { 735 str_length = strlen(dev->input_audiofilename); 736 dev->_audiofilename = kmemdup(dev->input_audiofilename, 737 str_length + 1, GFP_KERNEL); 738 739 if (!dev->_audiofilename) 740 goto error; 741 742 /* Default if filename is empty string */ 743 if (strcmp(dev->input_audiofilename, "") == 0) 744 dev->_audiofilename = "/root/audioGOOD.wav"; 745 } else { 746 str_length = strlen(_defaultAudioName); 747 dev->_audiofilename = kmemdup(_defaultAudioName, 748 str_length + 1, GFP_KERNEL); 749 750 if (!dev->_audiofilename) 751 goto error; 752 } 753 754 retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, 755 _line_size, 0); 756 757 dev->audio_upstream_riscbuf_size = 758 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS + 759 RISC_SYNC_INSTRUCTION_SIZE; 760 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS; 761 762 /* Allocating buffers and prepare RISC program */ 763 retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch, 764 _line_size); 765 if (retval < 0) { 766 pr_err("%s: Failed to set up Audio upstream buffers!\n", 767 dev->name); 768 goto error; 769 } 770 /* Start RISC engine */ 771 cx25821_start_audio_dma_upstream(dev, sram_ch); 772 773 return 0; 774 775error: 776 cx25821_dev_unregister(dev); 777 778 return err; 779} 780