drivers/staging/cx25821/cx25821-video-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 #include "cx25821-video.h"
  24 #include "cx25821-video-upstream.h"
  25
  26 #include <linux/fs.h>
  27 #include <linux/errno.h>
  28 #include <linux/kernel.h>
  29 #include <linux/init.h>
  30 #include <linux/module.h>
  31 #include <linux/syscalls.h>
  32 #include <linux/file.h>
  33 #include <linux/fcntl.h>
  34 #include <linux/slab.h>
  35 #include <asm/uaccess.h>
  36
  37 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  38 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  39 MODULE_LICENSE("GPL");
  40
  41 static int _intr_msk =
  42     FLD_VID_SRC_RISC1 | FLD_VID_SRC_UF | FLD_VID_SRC_SYNC | FLD_VID_SRC_OPC_ERR;
  43
  44 int cx25821_sram_channel_setup_upstream(struct cx25821_dev *dev,
  45                                         struct sram_channel *ch,
  46                                         unsigned int bpl, u32 risc)
  47 {
  48         unsigned int i, lines;
  49         u32 cdt;
  50
  51         if (ch->cmds_start == 0) {
  52                 cx_write(ch->ptr1_reg, 0);
  53                 cx_write(ch->ptr2_reg, 0);
  54                 cx_write(ch->cnt2_reg, 0);
  55                 cx_write(ch->cnt1_reg, 0);
  56                 return 0;
  57         }
  58
  59         bpl = (bpl + 7) & ~7;   /* alignment */
  60         cdt = ch->cdt;
  61         lines = ch->fifo_size / bpl;
  62
  63         if (lines > 4) {
  64                 lines = 4;
  65         }
  66
  67         BUG_ON(lines < 2);
  68
  69         /* write CDT */
  70         for (i = 0; i < lines; i++) {
  71                 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
  72                 cx_write(cdt + 16 * i + 4, 0);
  73                 cx_write(cdt + 16 * i + 8, 0);
  74                 cx_write(cdt + 16 * i + 12, 0);
  75         }
  76
  77         /* write CMDS */
  78         cx_write(ch->cmds_start + 0, risc);
  79
  80         cx_write(ch->cmds_start + 4, 0);
  81         cx_write(ch->cmds_start + 8, cdt);
  82         cx_write(ch->cmds_start + 12, (lines * 16) >> 3);
  83         cx_write(ch->cmds_start + 16, ch->ctrl_start);
  84
  85         cx_write(ch->cmds_start + 20, VID_IQ_SIZE_DW);
  86
  87         for (i = 24; i < 80; i += 4)
  88                 cx_write(ch->cmds_start + i, 0);
  89
  90         /* fill registers */
  91         cx_write(ch->ptr1_reg, ch->fifo_start);
  92         cx_write(ch->ptr2_reg, cdt);
  93         cx_write(ch->cnt2_reg, (lines * 16) >> 3);
  94         cx_write(ch->cnt1_reg, (bpl >> 3) - 1);
  95
  96         return 0;
  97 }
  98
  99 static __le32 *cx25821_update_riscprogram(struct cx25821_dev *dev,
 100                                           __le32 * rp, unsigned int offset,
 101                                           unsigned int bpl, u32 sync_line,
 102                                           unsigned int lines, int fifo_enable,
 103                                           int field_type)
 104 {
 105         unsigned int line, i;
 106         int dist_betwn_starts = bpl * 2;
 107
 108         *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
 109
 110         if (USE_RISC_NOOP_VIDEO) {
 111                 for (i = 0; i < NUM_NO_OPS; i++) {
 112                         *(rp++) = cpu_to_le32(RISC_NOOP);
 113                 }
 114         }
 115
 116         /* scan lines */
 117         for (line = 0; line < lines; line++) {
 118                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
 119                 *(rp++) = cpu_to_le32(dev->_data_buf_phys_addr + offset);
 120                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
 121
 122                 if ((lines <= NTSC_FIELD_HEIGHT)
 123                     || (line < (NTSC_FIELD_HEIGHT - 1)) || !(dev->_isNTSC)) {
 124                         offset += dist_betwn_starts;
 125                 }
 126         }
 127
 128         return rp;
 129 }
 130
 131 static __le32 *cx25821_risc_field_upstream(struct cx25821_dev *dev, __le32 * rp,
 132                                            dma_addr_t databuf_phys_addr,
 133                                            unsigned int offset, u32 sync_line,
 134                                            unsigned int bpl, unsigned int lines,
 135                                            int fifo_enable, int field_type)
 136 {
 137         unsigned int line, i;
 138         struct sram_channel *sram_ch =
 139             &dev->sram_channels[dev->_channel_upstream_select];
 140         int dist_betwn_starts = bpl * 2;
 141
 142         /* sync instruction */
 143         if (sync_line != NO_SYNC_LINE) {
 144                 *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
 145         }
 146
 147         if (USE_RISC_NOOP_VIDEO) {
 148                 for (i = 0; i < NUM_NO_OPS; i++) {
 149                         *(rp++) = cpu_to_le32(RISC_NOOP);
 150                 }
 151         }
 152
 153         /* scan lines */
 154         for (line = 0; line < lines; line++) {
 155                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
 156                 *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
 157                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
 158
 159                 if ((lines <= NTSC_FIELD_HEIGHT)
 160                     || (line < (NTSC_FIELD_HEIGHT - 1)) || !(dev->_isNTSC)) {
 161                         offset += dist_betwn_starts;    //to skip the other field line
 162                 }
 163
 164                 // check if we need to enable the FIFO after the first 4 lines
 165                 // For the upstream video channel, the risc engine will enable the FIFO.
 166                 if (fifo_enable && line == 3) {
 167                         *(rp++) = RISC_WRITECR;
 168                         *(rp++) = sram_ch->dma_ctl;
 169                         *(rp++) = FLD_VID_FIFO_EN;
 170                         *(rp++) = 0x00000001;
 171                 }
 172         }
 173
 174         return rp;
 175 }
 176
 177 int cx25821_risc_buffer_upstream(struct cx25821_dev *dev,
 178                                  struct pci_dev *pci,
 179                                  unsigned int top_offset,
 180                                  unsigned int bpl, unsigned int lines)
 181 {
 182         __le32 *rp;
 183         int fifo_enable = 0;
 184         int singlefield_lines = lines >> 1;     //get line count for single field
 185         int odd_num_lines = singlefield_lines;
 186         int frame = 0;
 187         int frame_size = 0;
 188         int databuf_offset = 0;
 189         int risc_program_size = 0;
 190         int risc_flag = RISC_CNT_RESET;
 191         unsigned int bottom_offset = bpl;
 192         dma_addr_t risc_phys_jump_addr;
 193
 194         if (dev->_isNTSC) {
 195                 odd_num_lines = singlefield_lines + 1;
 196                 risc_program_size = FRAME1_VID_PROG_SIZE;
 197                 frame_size =
 198                     (bpl ==
 199                      Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 :
 200                     FRAME_SIZE_NTSC_Y422;
 201         } else {
 202                 risc_program_size = PAL_VID_PROG_SIZE;
 203                 frame_size =
 204                     (bpl ==
 205                      Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 206         }
 207
 208         /* Virtual address of Risc buffer program */
 209         rp = dev->_dma_virt_addr;
 210
 211         for (frame = 0; frame < NUM_FRAMES; frame++) {
 212                 databuf_offset = frame_size * frame;
 213
 214                 if (UNSET != top_offset) {
 215                         fifo_enable = (frame == 0) ? FIFO_ENABLE : FIFO_DISABLE;
 216                         rp = cx25821_risc_field_upstream(dev, rp,
 217                                                          dev->
 218                                                          _data_buf_phys_addr +
 219                                                          databuf_offset,
 220                                                          top_offset, 0, bpl,
 221                                                          odd_num_lines,
 222                                                          fifo_enable,
 223                                                          ODD_FIELD);
 224                 }
 225
 226                 fifo_enable = FIFO_DISABLE;
 227
 228                 //Even Field
 229                 rp = cx25821_risc_field_upstream(dev, rp,
 230                                                  dev->_data_buf_phys_addr +
 231                                                  databuf_offset, bottom_offset,
 232                                                  0x200, bpl, singlefield_lines,
 233                                                  fifo_enable, EVEN_FIELD);
 234
 235                 if (frame == 0) {
 236                         risc_flag = RISC_CNT_RESET;
 237                         risc_phys_jump_addr =
 238                             dev->_dma_phys_start_addr + risc_program_size;
 239                 } else {
 240                         risc_phys_jump_addr = dev->_dma_phys_start_addr;
 241                         risc_flag = RISC_CNT_INC;
 242                 }
 243
 244                 // Loop to 2ndFrameRISC or to Start of Risc program & generate IRQ
 245                 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
 246                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 247                 *(rp++) = cpu_to_le32(0);
 248         }
 249
 250         return 0;
 251 }
 252
 253 void cx25821_stop_upstream_video_ch1(struct cx25821_dev *dev)
 254 {
 255         struct sram_channel *sram_ch =
 256             &dev->sram_channels[VID_UPSTREAM_SRAM_CHANNEL_I];
 257         u32 tmp = 0;
 258
 259         if (!dev->_is_running) {
 260                 printk
 261                     ("cx25821: No video file is currently running so return!\n");
 262                 return;
 263         }
 264         //Disable RISC interrupts
 265         tmp = cx_read(sram_ch->int_msk);
 266         cx_write(sram_ch->int_msk, tmp & ~_intr_msk);
 267
 268         //Turn OFF risc and fifo enable
 269         tmp = cx_read(sram_ch->dma_ctl);
 270         cx_write(sram_ch->dma_ctl, tmp & ~(FLD_VID_FIFO_EN | FLD_VID_RISC_EN));
 271
 272         //Clear data buffer memory
 273         if (dev->_data_buf_virt_addr)
 274                 memset(dev->_data_buf_virt_addr, 0, dev->_data_buf_size);
 275
 276         dev->_is_running = 0;
 277         dev->_is_first_frame = 0;
 278         dev->_frame_count = 0;
 279         dev->_file_status = END_OF_FILE;
 280
 281         if (dev->_irq_queues) {
 282                 kfree(dev->_irq_queues);
 283                 dev->_irq_queues = NULL;
 284         }
 285
 286         if (dev->_filename != NULL)
 287                 kfree(dev->_filename);
 288
 289         tmp = cx_read(VID_CH_MODE_SEL);
 290         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
 291 }
 292
 293 void cx25821_free_mem_upstream_ch1(struct cx25821_dev *dev)
 294 {
 295         if (dev->_is_running) {
 296                 cx25821_stop_upstream_video_ch1(dev);
 297         }
 298
 299         if (dev->_dma_virt_addr) {
 300                 pci_free_consistent(dev->pci, dev->_risc_size,
 301                                     dev->_dma_virt_addr, dev->_dma_phys_addr);
 302                 dev->_dma_virt_addr = NULL;
 303         }
 304
 305         if (dev->_data_buf_virt_addr) {
 306                 pci_free_consistent(dev->pci, dev->_data_buf_size,
 307                                     dev->_data_buf_virt_addr,
 308                                     dev->_data_buf_phys_addr);
 309                 dev->_data_buf_virt_addr = NULL;
 310         }
 311 }
 312
 313 int cx25821_get_frame(struct cx25821_dev *dev, struct sram_channel *sram_ch)
 314 {
 315         struct file *myfile;
 316         int frame_index_temp = dev->_frame_index;
 317         int i = 0;
 318         int line_size =
 319             (dev->_pixel_format ==
 320              PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
 321         int frame_size = 0;
 322         int frame_offset = 0;
 323         ssize_t vfs_read_retval = 0;
 324         char mybuf[line_size];
 325         loff_t file_offset;
 326         loff_t pos;
 327         mm_segment_t old_fs;
 328
 329         if (dev->_file_status == END_OF_FILE)
 330                 return 0;
 331
 332         if (dev->_isNTSC) {
 333                 frame_size =
 334                     (line_size ==
 335                      Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 :
 336                     FRAME_SIZE_NTSC_Y422;
 337         } else {
 338                 frame_size =
 339                     (line_size ==
 340                      Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 341         }
 342
 343         frame_offset = (frame_index_temp > 0) ? frame_size : 0;
 344         file_offset = dev->_frame_count * frame_size;
 345
 346         myfile = filp_open(dev->_filename, O_RDONLY | O_LARGEFILE, 0);
 347
 348         if (IS_ERR(myfile)) {
 349                 const int open_errno = -PTR_ERR(myfile);
 350                 printk("%s(): ERROR opening file(%s) with errno = %d! \n",
 351                        __func__, dev->_filename, open_errno);
 352                 return PTR_ERR(myfile);
 353         } else {
 354                 if (!(myfile->f_op)) {
 355                         printk("%s: File has no file operations registered!",
 356                                __func__);
 357                         filp_close(myfile, NULL);
 358                         return -EIO;
 359                 }
 360
 361                 if (!myfile->f_op->read) {
 362                         printk("%s: File has no READ operations registered!",
 363                                __func__);
 364                         filp_close(myfile, NULL);
 365                         return -EIO;
 366                 }
 367
 368                 pos = myfile->f_pos;
 369                 old_fs = get_fs();
 370                 set_fs(KERNEL_DS);
 371
 372                 for (i = 0; i < dev->_lines_count; i++) {
 373                         pos = file_offset;
 374
 375                         vfs_read_retval =
 376                             vfs_read(myfile, mybuf, line_size, &pos);
 377
 378                         if (vfs_read_retval > 0 && vfs_read_retval == line_size
 379                             && dev->_data_buf_virt_addr != NULL) {
 380                                 memcpy((void *)(dev->_data_buf_virt_addr +
 381                                                 frame_offset / 4), mybuf,
 382                                        vfs_read_retval);
 383                         }
 384
 385                         file_offset += vfs_read_retval;
 386                         frame_offset += vfs_read_retval;
 387
 388                         if (vfs_read_retval < line_size) {
 389                                 printk(KERN_INFO
 390                                        "Done: exit %s() since no more bytes to read from Video file.\n",
 391                                        __func__);
 392                                 break;
 393                         }
 394                 }
 395
 396                 if (i > 0)
 397                         dev->_frame_count++;
 398
 399                 dev->_file_status =
 400                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 401
 402                 set_fs(old_fs);
 403                 filp_close(myfile, NULL);
 404         }
 405
 406         return 0;
 407 }
 408
 409 static void cx25821_vidups_handler(struct work_struct *work)
 410 {
 411         struct cx25821_dev *dev =
 412             container_of(work, struct cx25821_dev, _irq_work_entry);
 413
 414         if (!dev) {
 415                 printk("ERROR %s(): since container_of(work_struct) FAILED! \n",
 416                        __func__);
 417                 return;
 418         }
 419
 420         cx25821_get_frame(dev,
 421                           &dev->sram_channels[dev->_channel_upstream_select]);
 422 }
 423
 424 int cx25821_openfile(struct cx25821_dev *dev, struct sram_channel *sram_ch)
 425 {
 426         struct file *myfile;
 427         int i = 0, j = 0;
 428         int line_size =
 429             (dev->_pixel_format ==
 430              PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
 431         ssize_t vfs_read_retval = 0;
 432         char mybuf[line_size];
 433         loff_t pos;
 434         loff_t offset = (unsigned long)0;
 435         mm_segment_t old_fs;
 436
 437         myfile = filp_open(dev->_filename, O_RDONLY | O_LARGEFILE, 0);
 438
 439         if (IS_ERR(myfile)) {
 440                 const int open_errno = -PTR_ERR(myfile);
 441                 printk("%s(): ERROR opening file(%s) with errno = %d! \n",
 442                        __func__, dev->_filename, open_errno);
 443                 return PTR_ERR(myfile);
 444         } else {
 445                 if (!(myfile->f_op)) {
 446                         printk("%s: File has no file operations registered!",
 447                                __func__);
 448                         filp_close(myfile, NULL);
 449                         return -EIO;
 450                 }
 451
 452                 if (!myfile->f_op->read) {
 453                         printk
 454                             ("%s: File has no READ operations registered!  Returning.",
 455                              __func__);
 456                         filp_close(myfile, NULL);
 457                         return -EIO;
 458                 }
 459
 460                 pos = myfile->f_pos;
 461                 old_fs = get_fs();
 462                 set_fs(KERNEL_DS);
 463
 464                 for (j = 0; j < NUM_FRAMES; j++) {
 465                         for (i = 0; i < dev->_lines_count; i++) {
 466                                 pos = offset;
 467
 468                                 vfs_read_retval =
 469                                     vfs_read(myfile, mybuf, line_size, &pos);
 470
 471                                 if (vfs_read_retval > 0
 472                                     && vfs_read_retval == line_size
 473                                     && dev->_data_buf_virt_addr != NULL) {
 474                                         memcpy((void *)(dev->
 475                                                         _data_buf_virt_addr +
 476                                                         offset / 4), mybuf,
 477                                                vfs_read_retval);
 478                                 }
 479
 480                                 offset += vfs_read_retval;
 481
 482                                 if (vfs_read_retval < line_size) {
 483                                         printk(KERN_INFO
 484                                                "Done: exit %s() since no more bytes to read from Video file.\n",
 485                                                __func__);
 486                                         break;
 487                                 }
 488                         }
 489
 490                         if (i > 0)
 491                                 dev->_frame_count++;
 492
 493                         if (vfs_read_retval < line_size) {
 494                                 break;
 495                         }
 496                 }
 497
 498                 dev->_file_status =
 499                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 500
 501                 set_fs(old_fs);
 502                 myfile->f_pos = 0;
 503                 filp_close(myfile, NULL);
 504         }
 505
 506         return 0;
 507 }
 508
 509 int cx25821_upstream_buffer_prepare(struct cx25821_dev *dev,
 510                                     struct sram_channel *sram_ch, int bpl)
 511 {
 512         int ret = 0;
 513         dma_addr_t dma_addr;
 514         dma_addr_t data_dma_addr;
 515
 516         if (dev->_dma_virt_addr != NULL) {
 517                 pci_free_consistent(dev->pci, dev->upstream_riscbuf_size,
 518                                     dev->_dma_virt_addr, dev->_dma_phys_addr);
 519         }
 520
 521         dev->_dma_virt_addr =
 522             pci_alloc_consistent(dev->pci, dev->upstream_riscbuf_size,
 523                                  &dma_addr);
 524         dev->_dma_virt_start_addr = dev->_dma_virt_addr;
 525         dev->_dma_phys_start_addr = dma_addr;
 526         dev->_dma_phys_addr = dma_addr;
 527         dev->_risc_size = dev->upstream_riscbuf_size;
 528
 529         if (!dev->_dma_virt_addr) {
 530                 printk
 531                     ("cx25821: FAILED to allocate memory for Risc buffer! Returning.\n");
 532                 return -ENOMEM;
 533         }
 534
 535         //Clear memory at address
 536         memset(dev->_dma_virt_addr, 0, dev->_risc_size);
 537
 538         if (dev->_data_buf_virt_addr != NULL) {
 539                 pci_free_consistent(dev->pci, dev->upstream_databuf_size,
 540                                     dev->_data_buf_virt_addr,
 541                                     dev->_data_buf_phys_addr);
 542         }
 543         //For Video Data buffer allocation
 544         dev->_data_buf_virt_addr =
 545             pci_alloc_consistent(dev->pci, dev->upstream_databuf_size,
 546                                  &data_dma_addr);
 547         dev->_data_buf_phys_addr = data_dma_addr;
 548         dev->_data_buf_size = dev->upstream_databuf_size;
 549
 550         if (!dev->_data_buf_virt_addr) {
 551                 printk
 552                     ("cx25821: FAILED to allocate memory for data buffer! Returning.\n");
 553                 return -ENOMEM;
 554         }
 555
 556         //Clear memory at address
 557         memset(dev->_data_buf_virt_addr, 0, dev->_data_buf_size);
 558
 559         ret = cx25821_openfile(dev, sram_ch);
 560         if (ret < 0)
 561                 return ret;
 562
 563         //Create RISC programs
 564         ret =
 565             cx25821_risc_buffer_upstream(dev, dev->pci, 0, bpl,
 566                                          dev->_lines_count);
 567         if (ret < 0) {
 568                 printk(KERN_INFO
 569                        "cx25821: Failed creating Video Upstream Risc programs! \n");
 570                 goto error;
 571         }
 572
 573         return 0;
 574
 575       error:
 576         return ret;
 577 }
 578
 579 int cx25821_video_upstream_irq(struct cx25821_dev *dev, int chan_num,
 580                                u32 status)
 581 {
 582         u32 int_msk_tmp;
 583         struct sram_channel *channel = &dev->sram_channels[chan_num];
 584         int singlefield_lines = NTSC_FIELD_HEIGHT;
 585         int line_size_in_bytes = Y422_LINE_SZ;
 586         int odd_risc_prog_size = 0;
 587         dma_addr_t risc_phys_jump_addr;
 588         __le32 *rp;
 589
 590         if (status & FLD_VID_SRC_RISC1) {
 591                 // We should only process one program per call
 592                 u32 prog_cnt = cx_read(channel->gpcnt);
 593
 594                 //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers
 595                 int_msk_tmp = cx_read(channel->int_msk);
 596                 cx_write(channel->int_msk, int_msk_tmp & ~_intr_msk);
 597                 cx_write(channel->int_stat, _intr_msk);
 598
 599                 spin_lock(&dev->slock);
 600
 601                 dev->_frame_index = prog_cnt;
 602
 603                 queue_work(dev->_irq_queues, &dev->_irq_work_entry);
 604
 605                 if (dev->_is_first_frame) {
 606                         dev->_is_first_frame = 0;
 607
 608                         if (dev->_isNTSC) {
 609                                 singlefield_lines += 1;
 610                                 odd_risc_prog_size = ODD_FLD_NTSC_PROG_SIZE;
 611                         } else {
 612                                 singlefield_lines = PAL_FIELD_HEIGHT;
 613                                 odd_risc_prog_size = ODD_FLD_PAL_PROG_SIZE;
 614                         }
 615
 616                         if (dev->_dma_virt_start_addr != NULL) {
 617                                 line_size_in_bytes =
 618                                     (dev->_pixel_format ==
 619                                      PIXEL_FRMT_411) ? Y411_LINE_SZ :
 620                                     Y422_LINE_SZ;
 621                                 risc_phys_jump_addr =
 622                                     dev->_dma_phys_start_addr +
 623                                     odd_risc_prog_size;
 624
 625                                 rp = cx25821_update_riscprogram(dev,
 626                                                                 dev->
 627                                                                 _dma_virt_start_addr,
 628                                                                 TOP_OFFSET,
 629                                                                 line_size_in_bytes,
 630                                                                 0x0,
 631                                                                 singlefield_lines,
 632                                                                 FIFO_DISABLE,
 633                                                                 ODD_FIELD);
 634
 635                                 // Jump to Even Risc program of 1st Frame
 636                                 *(rp++) = cpu_to_le32(RISC_JUMP);
 637                                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 638                                 *(rp++) = cpu_to_le32(0);
 639                         }
 640                 }
 641
 642                 spin_unlock(&dev->slock);
 643         } else {
 644                 if (status & FLD_VID_SRC_UF)
 645                         printk
 646                             ("%s: Video Received Underflow Error Interrupt!\n",
 647                              __func__);
 648
 649                 if (status & FLD_VID_SRC_SYNC)
 650                         printk("%s: Video Received Sync Error Interrupt!\n",
 651                                __func__);
 652
 653                 if (status & FLD_VID_SRC_OPC_ERR)
 654                         printk("%s: Video Received OpCode Error Interrupt!\n",
 655                                __func__);
 656         }
 657
 658         if (dev->_file_status == END_OF_FILE) {
 659                 printk("cx25821: EOF Channel 1 Framecount = %d\n",
 660                        dev->_frame_count);
 661                 return -1;
 662         }
 663         //ElSE, set the interrupt mask register, re-enable irq.
 664         int_msk_tmp = cx_read(channel->int_msk);
 665         cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
 666
 667         return 0;
 668 }
 669
 670 static irqreturn_t cx25821_upstream_irq(int irq, void *dev_id)
 671 {
 672         struct cx25821_dev *dev = dev_id;
 673         u32 msk_stat, vid_status;
 674         int handled = 0;
 675         int channel_num = 0;
 676         struct sram_channel *sram_ch;
 677
 678         if (!dev)
 679                 return -1;
 680
 681         channel_num = VID_UPSTREAM_SRAM_CHANNEL_I;
 682
 683         sram_ch = &dev->sram_channels[channel_num];
 684
 685         msk_stat = cx_read(sram_ch->int_mstat);
 686         vid_status = cx_read(sram_ch->int_stat);
 687
 688         // Only deal with our interrupt
 689         if (vid_status) {
 690                 handled =
 691                     cx25821_video_upstream_irq(dev, channel_num, vid_status);
 692         }
 693
 694         if (handled < 0) {
 695                 cx25821_stop_upstream_video_ch1(dev);
 696         } else {
 697                 handled += handled;
 698         }
 699
 700         return IRQ_RETVAL(handled);
 701 }
 702
 703 void cx25821_set_pixelengine(struct cx25821_dev *dev, struct sram_channel *ch,
 704                              int pix_format)
 705 {
 706         int width = WIDTH_D1;
 707         int height = dev->_lines_count;
 708         int num_lines, odd_num_lines;
 709         u32 value;
 710         int vip_mode = OUTPUT_FRMT_656;
 711
 712         value = ((pix_format & 0x3) << 12) | (vip_mode & 0x7);
 713         value &= 0xFFFFFFEF;
 714         value |= dev->_isNTSC ? 0 : 0x10;
 715         cx_write(ch->vid_fmt_ctl, value);
 716
 717         // set number of active pixels in each line. Default is 720 pixels in both NTSC and PAL format
 718         cx_write(ch->vid_active_ctl1, width);
 719
 720         num_lines = (height / 2) & 0x3FF;
 721         odd_num_lines = num_lines;
 722
 723         if (dev->_isNTSC) {
 724                 odd_num_lines += 1;
 725         }
 726
 727         value = (num_lines << 16) | odd_num_lines;
 728
 729         // set number of active lines in field 0 (top) and field 1 (bottom)
 730         cx_write(ch->vid_active_ctl2, value);
 731
 732         cx_write(ch->vid_cdt_size, VID_CDT_SIZE >> 3);
 733 }
 734
 735 int cx25821_start_video_dma_upstream(struct cx25821_dev *dev,
 736                                      struct sram_channel *sram_ch)
 737 {
 738         u32 tmp = 0;
 739         int err = 0;
 740
 741         // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
 742         tmp = cx_read(VID_CH_MODE_SEL);
 743         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 744
 745         // Set the physical start address of the RISC program in the initial program counter(IPC) member of the cmds.
 746         cx_write(sram_ch->cmds_start + 0, dev->_dma_phys_addr);
 747         cx_write(sram_ch->cmds_start + 4, 0);   /* Risc IPC High 64 bits 63-32 */
 748
 749         /* reset counter */
 750         cx_write(sram_ch->gpcnt_ctl, 3);
 751
 752         // Clear our bits from the interrupt status register.
 753         cx_write(sram_ch->int_stat, _intr_msk);
 754
 755         //Set the interrupt mask register, enable irq.
 756         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
 757         tmp = cx_read(sram_ch->int_msk);
 758         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
 759
 760         err =
 761             request_irq(dev->pci->irq, cx25821_upstream_irq,
 762                         IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
 763         if (err < 0) {
 764                 printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name,
 765                        dev->pci->irq);
 766                 goto fail_irq;
 767         }
 768
 769         // Start the DMA  engine
 770         tmp = cx_read(sram_ch->dma_ctl);
 771         cx_set(sram_ch->dma_ctl, tmp | FLD_VID_RISC_EN);
 772
 773         dev->_is_running = 1;
 774         dev->_is_first_frame = 1;
 775
 776         return 0;
 777
 778       fail_irq:
 779         cx25821_dev_unregister(dev);
 780         return err;
 781 }
 782
 783 int cx25821_vidupstream_init_ch1(struct cx25821_dev *dev, int channel_select,
 784                                  int pixel_format)
 785 {
 786         struct sram_channel *sram_ch;
 787         u32 tmp;
 788         int retval = 0;
 789         int err = 0;
 790         int data_frame_size = 0;
 791         int risc_buffer_size = 0;
 792         int str_length = 0;
 793
 794         if (dev->_is_running) {
 795                 printk("Video Channel is still running so return!\n");
 796                 return 0;
 797         }
 798
 799         dev->_channel_upstream_select = channel_select;
 800         sram_ch = &dev->sram_channels[channel_select];
 801
 802         INIT_WORK(&dev->_irq_work_entry, cx25821_vidups_handler);
 803         dev->_irq_queues = create_singlethread_workqueue("cx25821_workqueue");
 804
 805         if (!dev->_irq_queues) {
 806                 printk
 807                     ("cx25821: create_singlethread_workqueue() for Video FAILED!\n");
 808                 return -ENOMEM;
 809         }
 810         // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
 811         tmp = cx_read(VID_CH_MODE_SEL);
 812         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 813
 814         dev->_is_running = 0;
 815         dev->_frame_count = 0;
 816         dev->_file_status = RESET_STATUS;
 817         dev->_lines_count = dev->_isNTSC ? 480 : 576;
 818         dev->_pixel_format = pixel_format;
 819         dev->_line_size =
 820             (dev->_pixel_format ==
 821              PIXEL_FRMT_422) ? (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
 822         data_frame_size = dev->_isNTSC ? NTSC_DATA_BUF_SZ : PAL_DATA_BUF_SZ;
 823         risc_buffer_size =
 824             dev->_isNTSC ? NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
 825
 826         if (dev->input_filename) {
 827                 str_length = strlen(dev->input_filename);
 828                 dev->_filename = (char *)kmalloc(str_length + 1, GFP_KERNEL);
 829
 830                 if (!dev->_filename)
 831                         goto error;
 832
 833                 memcpy(dev->_filename, dev->input_filename, str_length + 1);
 834         } else {
 835                 str_length = strlen(dev->_defaultname);
 836                 dev->_filename = (char *)kmalloc(str_length + 1, GFP_KERNEL);
 837
 838                 if (!dev->_filename)
 839                         goto error;
 840
 841                 memcpy(dev->_filename, dev->_defaultname, str_length + 1);
 842         }
 843
 844         //Default if filename is empty string
 845         if (strcmp(dev->input_filename, "") == 0) {
 846                 if (dev->_isNTSC) {
 847                         dev->_filename =
 848                             (dev->_pixel_format ==
 849                              PIXEL_FRMT_411) ? "/root/vid411.yuv" :
 850                             "/root/vidtest.yuv";
 851                 } else {
 852                         dev->_filename =
 853                             (dev->_pixel_format ==
 854                              PIXEL_FRMT_411) ? "/root/pal411.yuv" :
 855                             "/root/pal422.yuv";
 856                 }
 857         }
 858
 859         dev->_is_running = 0;
 860         dev->_frame_count = 0;
 861         dev->_file_status = RESET_STATUS;
 862         dev->_lines_count = dev->_isNTSC ? 480 : 576;
 863         dev->_pixel_format = pixel_format;
 864         dev->_line_size =
 865             (dev->_pixel_format ==
 866              PIXEL_FRMT_422) ? (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
 867
 868         retval =
 869             cx25821_sram_channel_setup_upstream(dev, sram_ch, dev->_line_size,
 870                                                 0);
 871
 872         /* setup fifo + format */
 873         cx25821_set_pixelengine(dev, sram_ch, dev->_pixel_format);
 874
 875         dev->upstream_riscbuf_size = risc_buffer_size * 2;
 876         dev->upstream_databuf_size = data_frame_size * 2;
 877
 878         //Allocating buffers and prepare RISC program
 879         retval = cx25821_upstream_buffer_prepare(dev, sram_ch, dev->_line_size);
 880         if (retval < 0) {
 881                 printk(KERN_ERR
 882                        "%s: Failed to set up Video upstream buffers!\n",
 883                        dev->name);
 884                 goto error;
 885         }
 886
 887         cx25821_start_video_dma_upstream(dev, sram_ch);
 888
 889         return 0;
 890
 891       error:
 892         cx25821_dev_unregister(dev);
 893
 894         return err;
 895 }