drivers/staging/cx25821/cx25821-video-upstream-ch2.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-ch2.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 static __le32 *cx25821_update_riscprogram_ch2(struct cx25821_dev *dev,
  45                                               __le32 * rp, unsigned int offset,
  46                                               unsigned int bpl, u32 sync_line,
  47                                               unsigned int lines,
  48                                               int fifo_enable, int field_type)
  49 {
  50         unsigned int line, i;
  51         int dist_betwn_starts = bpl * 2;
  52
  53         *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
  54
  55         if (USE_RISC_NOOP_VIDEO) {
  56                 for (i = 0; i < NUM_NO_OPS; i++) {
  57                         *(rp++) = cpu_to_le32(RISC_NOOP);
  58                 }
  59         }
  60
  61         /* scan lines */
  62         for (line = 0; line < lines; line++) {
  63                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
  64                 *(rp++) = cpu_to_le32(dev->_data_buf_phys_addr_ch2 + offset);
  65                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
  66
  67                 if ((lines <= NTSC_FIELD_HEIGHT)
  68                     || (line < (NTSC_FIELD_HEIGHT - 1))
  69                     || !(dev->_isNTSC_ch2)) {
  70                         offset += dist_betwn_starts;
  71                 }
  72         }
  73
  74         return rp;
  75 }
  76
  77 static __le32 *cx25821_risc_field_upstream_ch2(struct cx25821_dev *dev,
  78                                                __le32 * rp,
  79                                                dma_addr_t databuf_phys_addr,
  80                                                unsigned int offset,
  81                                                u32 sync_line, unsigned int bpl,
  82                                                unsigned int lines,
  83                                                int fifo_enable, int field_type)
  84 {
  85         unsigned int line, i;
  86         struct sram_channel *sram_ch =
  87             &dev->sram_channels[dev->_channel2_upstream_select];
  88         int dist_betwn_starts = bpl * 2;
  89
  90         /* sync instruction */
  91         if (sync_line != NO_SYNC_LINE) {
  92                 *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
  93         }
  94
  95         if (USE_RISC_NOOP_VIDEO) {
  96                 for (i = 0; i < NUM_NO_OPS; i++) {
  97                         *(rp++) = cpu_to_le32(RISC_NOOP);
  98                 }
  99         }
 100
 101         /* scan lines */
 102         for (line = 0; line < lines; line++) {
 103                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
 104                 *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
 105                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
 106
 107                 if ((lines <= NTSC_FIELD_HEIGHT)
 108                     || (line < (NTSC_FIELD_HEIGHT - 1))
 109                     || !(dev->_isNTSC_ch2)) {
 110                         offset += dist_betwn_starts;
 111                 }
 112
 113                 // check if we need to enable the FIFO after the first 4 lines
 114                 // For the upstream video channel, the risc engine will enable the FIFO.
 115                 if (fifo_enable && line == 3) {
 116                         *(rp++) = RISC_WRITECR;
 117                         *(rp++) = sram_ch->dma_ctl;
 118                         *(rp++) = FLD_VID_FIFO_EN;
 119                         *(rp++) = 0x00000001;
 120                 }
 121         }
 122
 123         return rp;
 124 }
 125
 126 int cx25821_risc_buffer_upstream_ch2(struct cx25821_dev *dev,
 127                                      struct pci_dev *pci,
 128                                      unsigned int top_offset, unsigned int bpl,
 129                                      unsigned int lines)
 130 {
 131         __le32 *rp;
 132         int fifo_enable = 0;
 133         int singlefield_lines = lines >> 1;     //get line count for single field
 134         int odd_num_lines = singlefield_lines;
 135         int frame = 0;
 136         int frame_size = 0;
 137         int databuf_offset = 0;
 138         int risc_program_size = 0;
 139         int risc_flag = RISC_CNT_RESET;
 140         unsigned int bottom_offset = bpl;
 141         dma_addr_t risc_phys_jump_addr;
 142
 143         if (dev->_isNTSC_ch2) {
 144                 odd_num_lines = singlefield_lines + 1;
 145                 risc_program_size = FRAME1_VID_PROG_SIZE;
 146                 frame_size =
 147                     (bpl ==
 148                      Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 :
 149                     FRAME_SIZE_NTSC_Y422;
 150         } else {
 151                 risc_program_size = PAL_VID_PROG_SIZE;
 152                 frame_size =
 153                     (bpl ==
 154                      Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 155         }
 156
 157         /* Virtual address of Risc buffer program */
 158         rp = dev->_dma_virt_addr_ch2;
 159
 160         for (frame = 0; frame < NUM_FRAMES; frame++) {
 161                 databuf_offset = frame_size * frame;
 162
 163                 if (UNSET != top_offset) {
 164                         fifo_enable = (frame == 0) ? FIFO_ENABLE : FIFO_DISABLE;
 165                         rp = cx25821_risc_field_upstream_ch2(dev, rp,
 166                                                              dev->
 167                                                              _data_buf_phys_addr_ch2
 168                                                              + databuf_offset,
 169                                                              top_offset, 0, bpl,
 170                                                              odd_num_lines,
 171                                                              fifo_enable,
 172                                                              ODD_FIELD);
 173                 }
 174
 175                 fifo_enable = FIFO_DISABLE;
 176
 177                 //Even field
 178                 rp = cx25821_risc_field_upstream_ch2(dev, rp,
 179                                                      dev->
 180                                                      _data_buf_phys_addr_ch2 +
 181                                                      databuf_offset,
 182                                                      bottom_offset, 0x200, bpl,
 183                                                      singlefield_lines,
 184                                                      fifo_enable, EVEN_FIELD);
 185
 186                 if (frame == 0) {
 187                         risc_flag = RISC_CNT_RESET;
 188                         risc_phys_jump_addr =
 189                             dev->_dma_phys_start_addr_ch2 + risc_program_size;
 190                 } else {
 191                         risc_flag = RISC_CNT_INC;
 192                         risc_phys_jump_addr = dev->_dma_phys_start_addr_ch2;
 193                 }
 194
 195                 // Loop to 2ndFrameRISC or to Start of Risc program & generate IRQ
 196                 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
 197                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 198                 *(rp++) = cpu_to_le32(0);
 199         }
 200
 201         return 0;
 202 }
 203
 204 void cx25821_stop_upstream_video_ch2(struct cx25821_dev *dev)
 205 {
 206         struct sram_channel *sram_ch =
 207             &dev->sram_channels[VID_UPSTREAM_SRAM_CHANNEL_J];
 208         u32 tmp = 0;
 209
 210         if (!dev->_is_running_ch2) {
 211                 printk
 212                     ("cx25821: No video file is currently running so return!\n");
 213                 return;
 214         }
 215         //Disable RISC interrupts
 216         tmp = cx_read(sram_ch->int_msk);
 217         cx_write(sram_ch->int_msk, tmp & ~_intr_msk);
 218
 219         //Turn OFF risc and fifo
 220         tmp = cx_read(sram_ch->dma_ctl);
 221         cx_write(sram_ch->dma_ctl, tmp & ~(FLD_VID_FIFO_EN | FLD_VID_RISC_EN));
 222
 223         //Clear data buffer memory
 224         if (dev->_data_buf_virt_addr_ch2)
 225                 memset(dev->_data_buf_virt_addr_ch2, 0,
 226                        dev->_data_buf_size_ch2);
 227
 228         dev->_is_running_ch2 = 0;
 229         dev->_is_first_frame_ch2 = 0;
 230         dev->_frame_count_ch2 = 0;
 231         dev->_file_status_ch2 = END_OF_FILE;
 232
 233         if (dev->_irq_queues_ch2) {
 234                 kfree(dev->_irq_queues_ch2);
 235                 dev->_irq_queues_ch2 = NULL;
 236         }
 237
 238         if (dev->_filename_ch2 != NULL)
 239                 kfree(dev->_filename_ch2);
 240
 241         tmp = cx_read(VID_CH_MODE_SEL);
 242         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
 243 }
 244
 245 void cx25821_free_mem_upstream_ch2(struct cx25821_dev *dev)
 246 {
 247         if (dev->_is_running_ch2) {
 248                 cx25821_stop_upstream_video_ch2(dev);
 249         }
 250
 251         if (dev->_dma_virt_addr_ch2) {
 252                 pci_free_consistent(dev->pci, dev->_risc_size_ch2,
 253                                     dev->_dma_virt_addr_ch2,
 254                                     dev->_dma_phys_addr_ch2);
 255                 dev->_dma_virt_addr_ch2 = NULL;
 256         }
 257
 258         if (dev->_data_buf_virt_addr_ch2) {
 259                 pci_free_consistent(dev->pci, dev->_data_buf_size_ch2,
 260                                     dev->_data_buf_virt_addr_ch2,
 261                                     dev->_data_buf_phys_addr_ch2);
 262                 dev->_data_buf_virt_addr_ch2 = NULL;
 263         }
 264 }
 265
 266 int cx25821_get_frame_ch2(struct cx25821_dev *dev, struct sram_channel *sram_ch)
 267 {
 268         struct file *myfile;
 269         int frame_index_temp = dev->_frame_index_ch2;
 270         int i = 0;
 271         int line_size =
 272             (dev->_pixel_format_ch2 ==
 273              PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
 274         int frame_size = 0;
 275         int frame_offset = 0;
 276         ssize_t vfs_read_retval = 0;
 277         char mybuf[line_size];
 278         loff_t file_offset;
 279         loff_t pos;
 280         mm_segment_t old_fs;
 281
 282         if (dev->_file_status_ch2 == END_OF_FILE)
 283                 return 0;
 284
 285         if (dev->_isNTSC_ch2) {
 286                 frame_size =
 287                     (line_size ==
 288                      Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 :
 289                     FRAME_SIZE_NTSC_Y422;
 290         } else {
 291                 frame_size =
 292                     (line_size ==
 293                      Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 294         }
 295
 296         frame_offset = (frame_index_temp > 0) ? frame_size : 0;
 297         file_offset = dev->_frame_count_ch2 * frame_size;
 298
 299         myfile = filp_open(dev->_filename_ch2, O_RDONLY | O_LARGEFILE, 0);
 300
 301         if (IS_ERR(myfile)) {
 302                 const int open_errno = -PTR_ERR(myfile);
 303                 printk("%s(): ERROR opening file(%s) with errno = %d! \n",
 304                        __func__, dev->_filename_ch2, open_errno);
 305                 return PTR_ERR(myfile);
 306         } else {
 307                 if (!(myfile->f_op)) {
 308                         printk("%s: File has no file operations registered!",
 309                                __func__);
 310                         filp_close(myfile, NULL);
 311                         return -EIO;
 312                 }
 313
 314                 if (!myfile->f_op->read) {
 315                         printk("%s: File has no READ operations registered!",
 316                                __func__);
 317                         filp_close(myfile, NULL);
 318                         return -EIO;
 319                 }
 320
 321                 pos = myfile->f_pos;
 322                 old_fs = get_fs();
 323                 set_fs(KERNEL_DS);
 324
 325                 for (i = 0; i < dev->_lines_count_ch2; i++) {
 326                         pos = file_offset;
 327
 328                         vfs_read_retval =
 329                             vfs_read(myfile, mybuf, line_size, &pos);
 330
 331                         if (vfs_read_retval > 0 && vfs_read_retval == line_size
 332                             && dev->_data_buf_virt_addr_ch2 != NULL) {
 333                                 memcpy((void *)(dev->_data_buf_virt_addr_ch2 +
 334                                                 frame_offset / 4), mybuf,
 335                                        vfs_read_retval);
 336                         }
 337
 338                         file_offset += vfs_read_retval;
 339                         frame_offset += vfs_read_retval;
 340
 341                         if (vfs_read_retval < line_size) {
 342                                 printk(KERN_INFO
 343                                        "Done: exit %s() since no more bytes to read from Video file.\n",
 344                                        __func__);
 345                                 break;
 346                         }
 347                 }
 348
 349                 if (i > 0)
 350                         dev->_frame_count_ch2++;
 351
 352                 dev->_file_status_ch2 =
 353                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 354
 355                 set_fs(old_fs);
 356                 filp_close(myfile, NULL);
 357         }
 358
 359         return 0;
 360 }
 361
 362 static void cx25821_vidups_handler_ch2(struct work_struct *work)
 363 {
 364         struct cx25821_dev *dev =
 365             container_of(work, struct cx25821_dev, _irq_work_entry_ch2);
 366
 367         if (!dev) {
 368                 printk("ERROR %s(): since container_of(work_struct) FAILED! \n",
 369                        __func__);
 370                 return;
 371         }
 372
 373         cx25821_get_frame_ch2(dev,
 374                               &dev->sram_channels[dev->
 375                                                   _channel2_upstream_select]);
 376 }
 377
 378 int cx25821_openfile_ch2(struct cx25821_dev *dev, struct sram_channel *sram_ch)
 379 {
 380         struct file *myfile;
 381         int i = 0, j = 0;
 382         int line_size =
 383             (dev->_pixel_format_ch2 ==
 384              PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
 385         ssize_t vfs_read_retval = 0;
 386         char mybuf[line_size];
 387         loff_t pos;
 388         loff_t offset = (unsigned long)0;
 389         mm_segment_t old_fs;
 390
 391         myfile = filp_open(dev->_filename_ch2, O_RDONLY | O_LARGEFILE, 0);
 392
 393         if (IS_ERR(myfile)) {
 394                 const int open_errno = -PTR_ERR(myfile);
 395                 printk("%s(): ERROR opening file(%s) with errno = %d! \n",
 396                        __func__, dev->_filename_ch2, open_errno);
 397                 return PTR_ERR(myfile);
 398         } else {
 399                 if (!(myfile->f_op)) {
 400                         printk("%s: File has no file operations registered!",
 401                                __func__);
 402                         filp_close(myfile, NULL);
 403                         return -EIO;
 404                 }
 405
 406                 if (!myfile->f_op->read) {
 407                         printk
 408                             ("%s: File has no READ operations registered!  Returning.",
 409                              __func__);
 410                         filp_close(myfile, NULL);
 411                         return -EIO;
 412                 }
 413
 414                 pos = myfile->f_pos;
 415                 old_fs = get_fs();
 416                 set_fs(KERNEL_DS);
 417
 418                 for (j = 0; j < NUM_FRAMES; j++) {
 419                         for (i = 0; i < dev->_lines_count_ch2; i++) {
 420                                 pos = offset;
 421
 422                                 vfs_read_retval =
 423                                     vfs_read(myfile, mybuf, line_size, &pos);
 424
 425                                 if (vfs_read_retval > 0
 426                                     && vfs_read_retval == line_size
 427                                     && dev->_data_buf_virt_addr_ch2 != NULL) {
 428                                         memcpy((void *)(dev->
 429                                                         _data_buf_virt_addr_ch2
 430                                                         + offset / 4), mybuf,
 431                                                vfs_read_retval);
 432                                 }
 433
 434                                 offset += vfs_read_retval;
 435
 436                                 if (vfs_read_retval < line_size) {
 437                                         printk(KERN_INFO
 438                                                "Done: exit %s() since no more bytes to read from Video file.\n",
 439                                                __func__);
 440                                         break;
 441                                 }
 442                         }
 443
 444                         if (i > 0)
 445                                 dev->_frame_count_ch2++;
 446
 447                         if (vfs_read_retval < line_size) {
 448                                 break;
 449                         }
 450                 }
 451
 452                 dev->_file_status_ch2 =
 453                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
 454
 455                 set_fs(old_fs);
 456                 myfile->f_pos = 0;
 457                 filp_close(myfile, NULL);
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int cx25821_upstream_buffer_prepare_ch2(struct cx25821_dev *dev,
 464                                                struct sram_channel *sram_ch,
 465                                                int bpl)
 466 {
 467         int ret = 0;
 468         dma_addr_t dma_addr;
 469         dma_addr_t data_dma_addr;
 470
 471         if (dev->_dma_virt_addr_ch2 != NULL) {
 472                 pci_free_consistent(dev->pci, dev->upstream_riscbuf_size_ch2,
 473                                     dev->_dma_virt_addr_ch2,
 474                                     dev->_dma_phys_addr_ch2);
 475         }
 476
 477         dev->_dma_virt_addr_ch2 =
 478             pci_alloc_consistent(dev->pci, dev->upstream_riscbuf_size_ch2,
 479                                  &dma_addr);
 480         dev->_dma_virt_start_addr_ch2 = dev->_dma_virt_addr_ch2;
 481         dev->_dma_phys_start_addr_ch2 = dma_addr;
 482         dev->_dma_phys_addr_ch2 = dma_addr;
 483         dev->_risc_size_ch2 = dev->upstream_riscbuf_size_ch2;
 484
 485         if (!dev->_dma_virt_addr_ch2) {
 486                 printk
 487                     ("cx25821: FAILED to allocate memory for Risc buffer! Returning.\n");
 488                 return -ENOMEM;
 489         }
 490
 491         //Iniitize at this address until n bytes to 0
 492         memset(dev->_dma_virt_addr_ch2, 0, dev->_risc_size_ch2);
 493
 494         if (dev->_data_buf_virt_addr_ch2 != NULL) {
 495                 pci_free_consistent(dev->pci, dev->upstream_databuf_size_ch2,
 496                                     dev->_data_buf_virt_addr_ch2,
 497                                     dev->_data_buf_phys_addr_ch2);
 498         }
 499         //For Video Data buffer allocation
 500         dev->_data_buf_virt_addr_ch2 =
 501             pci_alloc_consistent(dev->pci, dev->upstream_databuf_size_ch2,
 502                                  &data_dma_addr);
 503         dev->_data_buf_phys_addr_ch2 = data_dma_addr;
 504         dev->_data_buf_size_ch2 = dev->upstream_databuf_size_ch2;
 505
 506         if (!dev->_data_buf_virt_addr_ch2) {
 507                 printk
 508                     ("cx25821: FAILED to allocate memory for data buffer! Returning.\n");
 509                 return -ENOMEM;
 510         }
 511
 512         //Initialize at this address until n bytes to 0
 513         memset(dev->_data_buf_virt_addr_ch2, 0, dev->_data_buf_size_ch2);
 514
 515         ret = cx25821_openfile_ch2(dev, sram_ch);
 516         if (ret < 0)
 517                 return ret;
 518
 519         //Creating RISC programs
 520         ret =
 521             cx25821_risc_buffer_upstream_ch2(dev, dev->pci, 0, bpl,
 522                                              dev->_lines_count_ch2);
 523         if (ret < 0) {
 524                 printk(KERN_INFO
 525                        "cx25821: Failed creating Video Upstream Risc programs! \n");
 526                 goto error;
 527         }
 528
 529         return 0;
 530
 531       error:
 532         return ret;
 533 }
 534
 535 int cx25821_video_upstream_irq_ch2(struct cx25821_dev *dev, int chan_num,
 536                                    u32 status)
 537 {
 538         u32 int_msk_tmp;
 539         struct sram_channel *channel = &dev->sram_channels[chan_num];
 540         int singlefield_lines = NTSC_FIELD_HEIGHT;
 541         int line_size_in_bytes = Y422_LINE_SZ;
 542         int odd_risc_prog_size = 0;
 543         dma_addr_t risc_phys_jump_addr;
 544         __le32 *rp;
 545
 546         if (status & FLD_VID_SRC_RISC1) {
 547                 // We should only process one program per call
 548                 u32 prog_cnt = cx_read(channel->gpcnt);
 549
 550                 //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers
 551                 int_msk_tmp = cx_read(channel->int_msk);
 552                 cx_write(channel->int_msk, int_msk_tmp & ~_intr_msk);
 553                 cx_write(channel->int_stat, _intr_msk);
 554
 555                 spin_lock(&dev->slock);
 556
 557                 dev->_frame_index_ch2 = prog_cnt;
 558
 559                 queue_work(dev->_irq_queues_ch2, &dev->_irq_work_entry_ch2);
 560
 561                 if (dev->_is_first_frame_ch2) {
 562                         dev->_is_first_frame_ch2 = 0;
 563
 564                         if (dev->_isNTSC_ch2) {
 565                                 singlefield_lines += 1;
 566                                 odd_risc_prog_size = ODD_FLD_NTSC_PROG_SIZE;
 567                         } else {
 568                                 singlefield_lines = PAL_FIELD_HEIGHT;
 569                                 odd_risc_prog_size = ODD_FLD_PAL_PROG_SIZE;
 570                         }
 571
 572                         if (dev->_dma_virt_start_addr_ch2 != NULL) {
 573                                 line_size_in_bytes =
 574                                     (dev->_pixel_format_ch2 ==
 575                                      PIXEL_FRMT_411) ? Y411_LINE_SZ :
 576                                     Y422_LINE_SZ;
 577                                 risc_phys_jump_addr =
 578                                     dev->_dma_phys_start_addr_ch2 +
 579                                     odd_risc_prog_size;
 580
 581                                 rp = cx25821_update_riscprogram_ch2(dev,
 582                                                                     dev->
 583                                                                     _dma_virt_start_addr_ch2,
 584                                                                     TOP_OFFSET,
 585                                                                     line_size_in_bytes,
 586                                                                     0x0,
 587                                                                     singlefield_lines,
 588                                                                     FIFO_DISABLE,
 589                                                                     ODD_FIELD);
 590
 591                                 // Jump to Even Risc program of 1st Frame
 592                                 *(rp++) = cpu_to_le32(RISC_JUMP);
 593                                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 594                                 *(rp++) = cpu_to_le32(0);
 595                         }
 596                 }
 597
 598                 spin_unlock(&dev->slock);
 599         }
 600
 601         if (dev->_file_status_ch2 == END_OF_FILE) {
 602                 printk("cx25821: EOF Channel 2 Framecount = %d\n",
 603                        dev->_frame_count_ch2);
 604                 return -1;
 605         }
 606         //ElSE, set the interrupt mask register, re-enable irq.
 607         int_msk_tmp = cx_read(channel->int_msk);
 608         cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
 609
 610         return 0;
 611 }
 612
 613 static irqreturn_t cx25821_upstream_irq_ch2(int irq, void *dev_id)
 614 {
 615         struct cx25821_dev *dev = dev_id;
 616         u32 msk_stat, vid_status;
 617         int handled = 0;
 618         int channel_num = 0;
 619         struct sram_channel *sram_ch;
 620
 621         if (!dev)
 622                 return -1;
 623
 624         channel_num = VID_UPSTREAM_SRAM_CHANNEL_J;
 625
 626         sram_ch = &dev->sram_channels[channel_num];
 627
 628         msk_stat = cx_read(sram_ch->int_mstat);
 629         vid_status = cx_read(sram_ch->int_stat);
 630
 631         // Only deal with our interrupt
 632         if (vid_status) {
 633                 handled =
 634                     cx25821_video_upstream_irq_ch2(dev, channel_num,
 635                                                    vid_status);
 636         }
 637
 638         if (handled < 0) {
 639                 cx25821_stop_upstream_video_ch2(dev);
 640         } else {
 641                 handled += handled;
 642         }
 643
 644         return IRQ_RETVAL(handled);
 645 }
 646
 647 static void cx25821_set_pixelengine_ch2(struct cx25821_dev *dev,
 648                                         struct sram_channel *ch, int pix_format)
 649 {
 650         int width = WIDTH_D1;
 651         int height = dev->_lines_count_ch2;
 652         int num_lines, odd_num_lines;
 653         u32 value;
 654         int vip_mode = PIXEL_ENGINE_VIP1;
 655
 656         value = ((pix_format & 0x3) << 12) | (vip_mode & 0x7);
 657         value &= 0xFFFFFFEF;
 658         value |= dev->_isNTSC_ch2 ? 0 : 0x10;
 659         cx_write(ch->vid_fmt_ctl, value);
 660
 661         // set number of active pixels in each line. Default is 720 pixels in both NTSC and PAL format
 662         cx_write(ch->vid_active_ctl1, width);
 663
 664         num_lines = (height / 2) & 0x3FF;
 665         odd_num_lines = num_lines;
 666
 667         if (dev->_isNTSC_ch2) {
 668                 odd_num_lines += 1;
 669         }
 670
 671         value = (num_lines << 16) | odd_num_lines;
 672
 673         // set number of active lines in field 0 (top) and field 1 (bottom)
 674         cx_write(ch->vid_active_ctl2, value);
 675
 676         cx_write(ch->vid_cdt_size, VID_CDT_SIZE >> 3);
 677 }
 678
 679 int cx25821_start_video_dma_upstream_ch2(struct cx25821_dev *dev,
 680                                          struct sram_channel *sram_ch)
 681 {
 682         u32 tmp = 0;
 683         int err = 0;
 684
 685         // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
 686         tmp = cx_read(VID_CH_MODE_SEL);
 687         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 688
 689         // Set the physical start address of the RISC program in the initial program counter(IPC) member of the cmds.
 690         cx_write(sram_ch->cmds_start + 0, dev->_dma_phys_addr_ch2);
 691         cx_write(sram_ch->cmds_start + 4, 0);   /* Risc IPC High 64 bits 63-32 */
 692
 693         /* reset counter */
 694         cx_write(sram_ch->gpcnt_ctl, 3);
 695
 696         // Clear our bits from the interrupt status register.
 697         cx_write(sram_ch->int_stat, _intr_msk);
 698
 699         //Set the interrupt mask register, enable irq.
 700         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
 701         tmp = cx_read(sram_ch->int_msk);
 702         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
 703
 704         err =
 705             request_irq(dev->pci->irq, cx25821_upstream_irq_ch2,
 706                         IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
 707         if (err < 0) {
 708                 printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name,
 709                        dev->pci->irq);
 710                 goto fail_irq;
 711         }
 712         // Start the DMA  engine
 713         tmp = cx_read(sram_ch->dma_ctl);
 714         cx_set(sram_ch->dma_ctl, tmp | FLD_VID_RISC_EN);
 715
 716         dev->_is_running_ch2 = 1;
 717         dev->_is_first_frame_ch2 = 1;
 718
 719         return 0;
 720
 721       fail_irq:
 722         cx25821_dev_unregister(dev);
 723         return err;
 724 }
 725
 726 int cx25821_vidupstream_init_ch2(struct cx25821_dev *dev, int channel_select,
 727                                  int pixel_format)
 728 {
 729         struct sram_channel *sram_ch;
 730         u32 tmp;
 731         int retval = 0;
 732         int err = 0;
 733         int data_frame_size = 0;
 734         int risc_buffer_size = 0;
 735         int str_length = 0;
 736
 737         if (dev->_is_running_ch2) {
 738                 printk("Video Channel is still running so return!\n");
 739                 return 0;
 740         }
 741
 742         dev->_channel2_upstream_select = channel_select;
 743         sram_ch = &dev->sram_channels[channel_select];
 744
 745         INIT_WORK(&dev->_irq_work_entry_ch2, cx25821_vidups_handler_ch2);
 746         dev->_irq_queues_ch2 =
 747             create_singlethread_workqueue("cx25821_workqueue2");
 748
 749         if (!dev->_irq_queues_ch2) {
 750                 printk
 751                     ("cx25821: create_singlethread_workqueue() for Video FAILED!\n");
 752                 return -ENOMEM;
 753         }
 754         // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
 755         tmp = cx_read(VID_CH_MODE_SEL);
 756         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 757
 758         dev->_is_running_ch2 = 0;
 759         dev->_frame_count_ch2 = 0;
 760         dev->_file_status_ch2 = RESET_STATUS;
 761         dev->_lines_count_ch2 = dev->_isNTSC_ch2 ? 480 : 576;
 762         dev->_pixel_format_ch2 = pixel_format;
 763         dev->_line_size_ch2 =
 764             (dev->_pixel_format_ch2 ==
 765              PIXEL_FRMT_422) ? (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
 766         data_frame_size = dev->_isNTSC_ch2 ? NTSC_DATA_BUF_SZ : PAL_DATA_BUF_SZ;
 767         risc_buffer_size =
 768             dev->_isNTSC_ch2 ? NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
 769
 770         if (dev->input_filename_ch2) {
 771                 str_length = strlen(dev->input_filename_ch2);
 772                 dev->_filename_ch2 =
 773                     (char *)kmalloc(str_length + 1, GFP_KERNEL);
 774
 775                 if (!dev->_filename_ch2)
 776                         goto error;
 777
 778                 memcpy(dev->_filename_ch2, dev->input_filename_ch2,
 779                        str_length + 1);
 780         } else {
 781                 str_length = strlen(dev->_defaultname_ch2);
 782                 dev->_filename_ch2 =
 783                     (char *)kmalloc(str_length + 1, GFP_KERNEL);
 784
 785                 if (!dev->_filename_ch2)
 786                         goto error;
 787
 788                 memcpy(dev->_filename_ch2, dev->_defaultname_ch2,
 789                        str_length + 1);
 790         }
 791
 792         //Default if filename is empty string
 793         if (strcmp(dev->input_filename_ch2, "") == 0) {
 794                 if (dev->_isNTSC_ch2) {
 795                         dev->_filename_ch2 =
 796                             (dev->_pixel_format_ch2 ==
 797                              PIXEL_FRMT_411) ? "/root/vid411.yuv" :
 798                             "/root/vidtest.yuv";
 799                 } else {
 800                         dev->_filename_ch2 =
 801                             (dev->_pixel_format_ch2 ==
 802                              PIXEL_FRMT_411) ? "/root/pal411.yuv" :
 803                             "/root/pal422.yuv";
 804                 }
 805         }
 806
 807         retval =
 808             cx25821_sram_channel_setup_upstream(dev, sram_ch,
 809                                                 dev->_line_size_ch2, 0);
 810
 811         /* setup fifo + format */
 812         cx25821_set_pixelengine_ch2(dev, sram_ch, dev->_pixel_format_ch2);
 813
 814         dev->upstream_riscbuf_size_ch2 = risc_buffer_size * 2;
 815         dev->upstream_databuf_size_ch2 = data_frame_size * 2;
 816
 817         //Allocating buffers and prepare RISC program
 818         retval =
 819             cx25821_upstream_buffer_prepare_ch2(dev, sram_ch,
 820                                                 dev->_line_size_ch2);
 821         if (retval < 0) {
 822                 printk(KERN_ERR
 823                        "%s: Failed to set up Video upstream buffers!\n",
 824                        dev->name);
 825                 goto error;
 826         }
 827
 828         cx25821_start_video_dma_upstream_ch2(dev, sram_ch);
 829
 830         return 0;
 831
 832       error:
 833         cx25821_dev_unregister(dev);
 834
 835         return err;
 836 }