drivers/media/video/cx25821/cx25821-audio-upstream.c

   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
  40 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  41 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  42 MODULE_LICENSE("GPL");
  43
  44 static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
  45                         FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
  46
  47 int 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
 102 static __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
 136 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->
 179                                                        _audiodata_buf_phys_addr
 180                                                        + databuf_offset, bpl,
 181                                                        fifo_enable);
 182
 183                 if (USE_RISC_NOOP_AUDIO) {
 184                         for (i = 0; i < NUM_NO_OPS; i++)
 185                                 *(rp++) = cpu_to_le32(RISC_NOOP);
 186                 }
 187
 188                 /* Loop to (Nth)FrameRISC or to Start of Risc program &
 189                  * generate IRQ */
 190                 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
 191                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 192                 *(rp++) = cpu_to_le32(0);
 193
 194                 /* Recalculate virtual address based on frame index */
 195                 rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
 196                     (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
 197         }
 198
 199         return 0;
 200 }
 201
 202 void cx25821_free_memory_audio(struct cx25821_dev *dev)
 203 {
 204         if (dev->_risc_virt_addr) {
 205                 pci_free_consistent(dev->pci, dev->_audiorisc_size,
 206                                     dev->_risc_virt_addr, dev->_risc_phys_addr);
 207                 dev->_risc_virt_addr = NULL;
 208         }
 209
 210         if (dev->_audiodata_buf_virt_addr) {
 211                 pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
 212                                     dev->_audiodata_buf_virt_addr,
 213                                     dev->_audiodata_buf_phys_addr);
 214                 dev->_audiodata_buf_virt_addr = NULL;
 215         }
 216 }
 217
 218 void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
 219 {
 220         struct sram_channel *sram_ch =
 221            dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
 222         u32 tmp = 0;
 223
 224         if (!dev->_audio_is_running) {
 225                 printk(KERN_DEBUG
 226                        pr_fmt("No audio file is currently running so return!\n"));
 227                 return;
 228         }
 229         /* Disable RISC interrupts */
 230         cx_write(sram_ch->int_msk, 0);
 231
 232         /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
 233         tmp = cx_read(sram_ch->dma_ctl);
 234         cx_write(sram_ch->dma_ctl,
 235                  tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
 236
 237         /* Clear data buffer memory */
 238         if (dev->_audiodata_buf_virt_addr)
 239                 memset(dev->_audiodata_buf_virt_addr, 0,
 240                        dev->_audiodata_buf_size);
 241
 242         dev->_audio_is_running = 0;
 243         dev->_is_first_audio_frame = 0;
 244         dev->_audioframe_count = 0;
 245         dev->_audiofile_status = END_OF_FILE;
 246
 247         kfree(dev->_irq_audio_queues);
 248         dev->_irq_audio_queues = NULL;
 249
 250         kfree(dev->_audiofilename);
 251 }
 252
 253 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
 254 {
 255         if (dev->_audio_is_running)
 256                 cx25821_stop_upstream_audio(dev);
 257
 258         cx25821_free_memory_audio(dev);
 259 }
 260
 261 int cx25821_get_audio_data(struct cx25821_dev *dev,
 262                            struct sram_channel *sram_ch)
 263 {
 264         struct file *myfile;
 265         int frame_index_temp = dev->_audioframe_index;
 266         int i = 0;
 267         int line_size = AUDIO_LINE_SIZE;
 268         int frame_size = AUDIO_DATA_BUF_SZ;
 269         int frame_offset = frame_size * frame_index_temp;
 270         ssize_t vfs_read_retval = 0;
 271         char mybuf[line_size];
 272         loff_t file_offset = dev->_audioframe_count * frame_size;
 273         loff_t pos;
 274         mm_segment_t old_fs;
 275
 276         if (dev->_audiofile_status == END_OF_FILE)
 277                 return 0;
 278
 279         myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
 280
 281         if (IS_ERR(myfile)) {
 282                 const int open_errno = -PTR_ERR(myfile);
 283                 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
 284                        __func__, dev->_audiofilename, open_errno);
 285                 return PTR_ERR(myfile);
 286         } else {
 287                 if (!(myfile->f_op)) {
 288                         pr_err("%s(): File has no file operations registered!\n",
 289                                __func__);
 290                         filp_close(myfile, NULL);
 291                         return -EIO;
 292                 }
 293
 294                 if (!myfile->f_op->read) {
 295                         pr_err("%s(): File has no READ operations registered!\n",
 296                                __func__);
 297                         filp_close(myfile, NULL);
 298                         return -EIO;
 299                 }
 300
 301                 pos = myfile->f_pos;
 302                 old_fs = get_fs();
 303                 set_fs(KERNEL_DS);
 304
 305                 for (i = 0; i < dev->_audio_lines_count; i++) {
 306                         pos = file_offset;
 307
 308                         vfs_read_retval =
 309                             vfs_read(myfile, mybuf, line_size, &pos);
 310
 311                         if (vfs_read_retval > 0 && vfs_read_retval == line_size
 312                             && dev->_audiodata_buf_virt_addr != NULL) {
 313                                 memcpy((void *)(dev->_audiodata_buf_virt_addr +
 314                                                 frame_offset / 4), mybuf,
 315                                        vfs_read_retval);
 316                         }
 317
 318                         file_offset += vfs_read_retval;
 319                         frame_offset += vfs_read_retval;
 320
 321                         if (vfs_read_retval < line_size) {
 322                                 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
 323                                         __func__);
 324                                 break;
 325                         }
 326                 }
 327
 328                 if (i > 0)
 329                         dev->_audioframe_count++;
 330
 331                 dev->_audiofile_status =
 332                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 333
 334                 set_fs(old_fs);
 335                 filp_close(myfile, NULL);
 336         }
 337
 338         return 0;
 339 }
 340
 341 static void cx25821_audioups_handler(struct work_struct *work)
 342 {
 343         struct cx25821_dev *dev =
 344             container_of(work, struct cx25821_dev, _audio_work_entry);
 345
 346         if (!dev) {
 347                 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n",
 348                        __func__);
 349                 return;
 350         }
 351
 352         cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel].
 353                         sram_channels);
 354 }
 355
 356 int cx25821_openfile_audio(struct cx25821_dev *dev,
 357                            struct sram_channel *sram_ch)
 358 {
 359         struct file *myfile;
 360         int i = 0, j = 0;
 361         int line_size = AUDIO_LINE_SIZE;
 362         ssize_t vfs_read_retval = 0;
 363         char mybuf[line_size];
 364         loff_t pos;
 365         loff_t offset = (unsigned long)0;
 366         mm_segment_t old_fs;
 367
 368         myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
 369
 370         if (IS_ERR(myfile)) {
 371                 const int open_errno = -PTR_ERR(myfile);
 372                 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
 373                        __func__, dev->_audiofilename, open_errno);
 374                 return PTR_ERR(myfile);
 375         } else {
 376                 if (!(myfile->f_op)) {
 377                         pr_err("%s(): File has no file operations registered!\n",
 378                                __func__);
 379                         filp_close(myfile, NULL);
 380                         return -EIO;
 381                 }
 382
 383                 if (!myfile->f_op->read) {
 384                         pr_err("%s(): File has no READ operations registered!\n",
 385                                __func__);
 386                         filp_close(myfile, NULL);
 387                         return -EIO;
 388                 }
 389
 390                 pos = myfile->f_pos;
 391                 old_fs = get_fs();
 392                 set_fs(KERNEL_DS);
 393
 394                 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
 395                         for (i = 0; i < dev->_audio_lines_count; i++) {
 396                                 pos = offset;
 397
 398                                 vfs_read_retval =
 399                                     vfs_read(myfile, mybuf, line_size, &pos);
 400
 401                                 if (vfs_read_retval > 0
 402                                     && vfs_read_retval == line_size
 403                                     && dev->_audiodata_buf_virt_addr != NULL) {
 404                                         memcpy((void *)(dev->
 405                                                         _audiodata_buf_virt_addr
 406                                                         + offset / 4), mybuf,
 407                                                vfs_read_retval);
 408                                 }
 409
 410                                 offset += vfs_read_retval;
 411
 412                                 if (vfs_read_retval < line_size) {
 413                                         pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
 414                                                 __func__);
 415                                         break;
 416                                 }
 417                         }
 418
 419                         if (i > 0)
 420                                 dev->_audioframe_count++;
 421
 422                         if (vfs_read_retval < line_size)
 423                                 break;
 424                 }
 425
 426                 dev->_audiofile_status =
 427                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 428
 429                 set_fs(old_fs);
 430                 myfile->f_pos = 0;
 431                 filp_close(myfile, NULL);
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
 438                                                  struct sram_channel *sram_ch,
 439                                                  int bpl)
 440 {
 441         int ret = 0;
 442         dma_addr_t dma_addr;
 443         dma_addr_t data_dma_addr;
 444
 445         cx25821_free_memory_audio(dev);
 446
 447         dev->_risc_virt_addr =
 448             pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
 449                                  &dma_addr);
 450         dev->_risc_virt_start_addr = dev->_risc_virt_addr;
 451         dev->_risc_phys_start_addr = dma_addr;
 452         dev->_risc_phys_addr = dma_addr;
 453         dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
 454
 455         if (!dev->_risc_virt_addr) {
 456                 printk(KERN_DEBUG
 457                        pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
 458                 return -ENOMEM;
 459         }
 460         /* Clear out memory at address */
 461         memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
 462
 463         /* For Audio Data buffer allocation */
 464         dev->_audiodata_buf_virt_addr =
 465             pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
 466                                  &data_dma_addr);
 467         dev->_audiodata_buf_phys_addr = data_dma_addr;
 468         dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
 469
 470         if (!dev->_audiodata_buf_virt_addr) {
 471                 printk(KERN_DEBUG
 472                        pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
 473                 return -ENOMEM;
 474         }
 475         /* Clear out memory at address */
 476         memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
 477
 478         ret = cx25821_openfile_audio(dev, sram_ch);
 479         if (ret < 0)
 480                 return ret;
 481
 482         /* Creating RISC programs */
 483         ret =
 484             cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
 485                                                dev->_audio_lines_count);
 486         if (ret < 0) {
 487                 printk(KERN_DEBUG
 488                        pr_fmt("ERROR creating audio upstream RISC programs!\n"));
 489                 goto error;
 490         }
 491
 492         return 0;
 493
 494 error:
 495         return ret;
 496 }
 497
 498 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
 499                                u32 status)
 500 {
 501         int i = 0;
 502         u32 int_msk_tmp;
 503         struct sram_channel *channel = dev->channels[chan_num].sram_channels;
 504         dma_addr_t risc_phys_jump_addr;
 505         __le32 *rp;
 506
 507         if (status & FLD_AUD_SRC_RISCI1) {
 508                 /* Get interrupt_index of the program that interrupted */
 509                 u32 prog_cnt = cx_read(channel->gpcnt);
 510
 511                 /* Since we've identified our IRQ, clear our bits from the
 512                  * interrupt mask and interrupt status registers */
 513                 cx_write(channel->int_msk, 0);
 514                 cx_write(channel->int_stat, cx_read(channel->int_stat));
 515
 516                 spin_lock(&dev->slock);
 517
 518                 while (prog_cnt != dev->_last_index_irq) {
 519                         /* Update _last_index_irq */
 520                         if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
 521                                 dev->_last_index_irq++;
 522                         else
 523                                 dev->_last_index_irq = 0;
 524
 525                         dev->_audioframe_index = dev->_last_index_irq;
 526
 527                         queue_work(dev->_irq_audio_queues,
 528                                    &dev->_audio_work_entry);
 529                 }
 530
 531                 if (dev->_is_first_audio_frame) {
 532                         dev->_is_first_audio_frame = 0;
 533
 534                         if (dev->_risc_virt_start_addr != NULL) {
 535                                 risc_phys_jump_addr =
 536                                     dev->_risc_phys_start_addr +
 537                                     RISC_SYNC_INSTRUCTION_SIZE +
 538                                     AUDIO_RISC_DMA_BUF_SIZE;
 539
 540                                 rp = cx25821_risc_field_upstream_audio(dev,
 541                                                 dev->_risc_virt_start_addr + 1,
 542                                                 dev->_audiodata_buf_phys_addr,
 543                                                 AUDIO_LINE_SIZE, FIFO_DISABLE);
 544
 545                                 if (USE_RISC_NOOP_AUDIO) {
 546                                         for (i = 0; i < NUM_NO_OPS; i++) {
 547                                                 *(rp++) =
 548                                                     cpu_to_le32(RISC_NOOP);
 549                                         }
 550                                 }
 551                                 /* Jump to 2nd Audio Frame */
 552                                 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
 553                                                 RISC_CNT_RESET);
 554                                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 555                                 *(rp++) = cpu_to_le32(0);
 556                         }
 557                 }
 558
 559                 spin_unlock(&dev->slock);
 560         } else {
 561                 if (status & FLD_AUD_SRC_OF)
 562                         pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
 563                                 __func__);
 564
 565                 if (status & FLD_AUD_SRC_SYNC)
 566                         pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
 567                                 __func__);
 568
 569                 if (status & FLD_AUD_SRC_OPC_ERR)
 570                         pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
 571                                 __func__);
 572
 573                 /* Read and write back the interrupt status register to clear
 574                  * our bits */
 575                 cx_write(channel->int_stat, cx_read(channel->int_stat));
 576         }
 577
 578         if (dev->_audiofile_status == END_OF_FILE) {
 579                 pr_warn("EOF Channel Audio Framecount = %d\n",
 580                         dev->_audioframe_count);
 581                 return -1;
 582         }
 583         /* ElSE, set the interrupt mask register, re-enable irq. */
 584         int_msk_tmp = cx_read(channel->int_msk);
 585         cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
 586
 587         return 0;
 588 }
 589
 590 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
 591 {
 592         struct cx25821_dev *dev = dev_id;
 593         u32 msk_stat, audio_status;
 594         int handled = 0;
 595         struct sram_channel *sram_ch;
 596
 597         if (!dev)
 598                 return -1;
 599
 600         sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels;
 601
 602         msk_stat = cx_read(sram_ch->int_mstat);
 603         audio_status = cx_read(sram_ch->int_stat);
 604
 605         /* Only deal with our interrupt */
 606         if (audio_status) {
 607                 handled = cx25821_audio_upstream_irq(dev,
 608                                 dev->_audio_upstream_channel, audio_status);
 609         }
 610
 611         if (handled < 0)
 612                 cx25821_stop_upstream_audio(dev);
 613         else
 614                 handled += handled;
 615
 616         return IRQ_RETVAL(handled);
 617 }
 618
 619 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
 620                                      struct sram_channel *sram_ch)
 621 {
 622         int count = 0;
 623         u32 tmp;
 624
 625         do {
 626                 /* Wait 10 microsecond before checking to see if the FIFO is
 627                  * turned ON. */
 628                 udelay(10);
 629
 630                 tmp = cx_read(sram_ch->dma_ctl);
 631
 632                 /* 10 millisecond timeout */
 633                 if (count++ > 1000) {
 634                         pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
 635                                __func__);
 636                         return;
 637                 }
 638
 639         } while (!(tmp & sram_ch->fld_aud_fifo_en));
 640
 641 }
 642
 643 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
 644                                      struct sram_channel *sram_ch)
 645 {
 646         u32 tmp = 0;
 647         int err = 0;
 648
 649         /* Set the physical start address of the RISC program in the initial
 650          * program counter(IPC) member of the CMDS. */
 651         cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
 652         /* Risc IPC High 64 bits 63-32 */
 653         cx_write(sram_ch->cmds_start + 4, 0);
 654
 655         /* reset counter */
 656         cx_write(sram_ch->gpcnt_ctl, 3);
 657
 658         /* Set the line length       (It looks like we do not need to set the
 659          * line length) */
 660         cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
 661
 662         /* Set the input mode to 16-bit */
 663         tmp = cx_read(sram_ch->aud_cfg);
 664         tmp |=
 665             FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
 666             FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
 667         cx_write(sram_ch->aud_cfg, tmp);
 668
 669         /* Read and write back the interrupt status register to clear it */
 670         tmp = cx_read(sram_ch->int_stat);
 671         cx_write(sram_ch->int_stat, tmp);
 672
 673         /* Clear our bits from the interrupt status register. */
 674         cx_write(sram_ch->int_stat, _intr_msk);
 675
 676         /* Set the interrupt mask register, enable irq. */
 677         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
 678         tmp = cx_read(sram_ch->int_msk);
 679         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
 680
 681         err =
 682             request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
 683                         IRQF_SHARED, dev->name, dev);
 684         if (err < 0) {
 685                 pr_err("%s: can't get upstream IRQ %d\n",
 686                        dev->name, dev->pci->irq);
 687                 goto fail_irq;
 688         }
 689
 690         /* Start the DMA  engine */
 691         tmp = cx_read(sram_ch->dma_ctl);
 692         cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
 693
 694         dev->_audio_is_running = 1;
 695         dev->_is_first_audio_frame = 1;
 696
 697         /* The fifo_en bit turns on by the first Risc program */
 698         cx25821_wait_fifo_enable(dev, sram_ch);
 699
 700         return 0;
 701
 702 fail_irq:
 703         cx25821_dev_unregister(dev);
 704         return err;
 705 }
 706
 707 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
 708 {
 709         struct sram_channel *sram_ch;
 710         int retval = 0;
 711         int err = 0;
 712         int str_length = 0;
 713
 714         if (dev->_audio_is_running) {
 715                 pr_warn("Audio Channel is still running so return!\n");
 716                 return 0;
 717         }
 718
 719         dev->_audio_upstream_channel = channel_select;
 720         sram_ch = dev->channels[channel_select].sram_channels;
 721
 722         /* Work queue */
 723         INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
 724         dev->_irq_audio_queues =
 725             create_singlethread_workqueue("cx25821_audioworkqueue");
 726
 727         if (!dev->_irq_audio_queues) {
 728                 printk(KERN_DEBUG
 729                        pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
 730                 return -ENOMEM;
 731         }
 732
 733         dev->_last_index_irq = 0;
 734         dev->_audio_is_running = 0;
 735         dev->_audioframe_count = 0;
 736         dev->_audiofile_status = RESET_STATUS;
 737         dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
 738         _line_size = AUDIO_LINE_SIZE;
 739
 740         if (dev->input_audiofilename) {
 741                 str_length = strlen(dev->input_audiofilename);
 742                 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
 743
 744                 if (!dev->_audiofilename)
 745                         goto error;
 746
 747                 memcpy(dev->_audiofilename, dev->input_audiofilename,
 748                        str_length + 1);
 749
 750                 /* Default if filename is empty string */
 751                 if (strcmp(dev->input_audiofilename, "") == 0)
 752                         dev->_audiofilename = "/root/audioGOOD.wav";
 753         } else {
 754                 str_length = strlen(_defaultAudioName);
 755                 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
 756
 757                 if (!dev->_audiofilename)
 758                         goto error;
 759
 760                 memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
 761         }
 762
 763         retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
 764                                                         _line_size, 0);
 765
 766         dev->audio_upstream_riscbuf_size =
 767             AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
 768             RISC_SYNC_INSTRUCTION_SIZE;
 769         dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
 770
 771         /* Allocating buffers and prepare RISC program */
 772         retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
 773                                                         _line_size);
 774         if (retval < 0) {
 775                 pr_err("%s: Failed to set up Audio upstream buffers!\n",
 776                        dev->name);
 777                 goto error;
 778         }
 779         /* Start RISC engine */
 780         cx25821_start_audio_dma_upstream(dev, sram_ch);
 781
 782         return 0;
 783
 784 error:
 785         cx25821_dev_unregister(dev);
 786
 787         return err;
 788 }