drivers/media/pci/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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include "cx25821-video.h"
  26 #include "cx25821-video-upstream.h"
  27
  28 #include <linux/errno.h>
  29 #include <linux/kernel.h>
  30 #include <linux/init.h>
  31 #include <linux/module.h>
  32 #include <linux/slab.h>
  33
  34 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  35 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  36 MODULE_LICENSE("GPL");
  37
  38 static int _intr_msk = FLD_VID_SRC_RISC1 | FLD_VID_SRC_UF | FLD_VID_SRC_SYNC |
  39                         FLD_VID_SRC_OPC_ERR;
  40
  41 int cx25821_sram_channel_setup_upstream(struct cx25821_dev *dev,
  42                                         const struct sram_channel *ch,
  43                                         unsigned int bpl, u32 risc)
  44 {
  45         unsigned int i, lines;
  46         u32 cdt;
  47
  48         if (ch->cmds_start == 0) {
  49                 cx_write(ch->ptr1_reg, 0);
  50                 cx_write(ch->ptr2_reg, 0);
  51                 cx_write(ch->cnt2_reg, 0);
  52                 cx_write(ch->cnt1_reg, 0);
  53                 return 0;
  54         }
  55
  56         bpl = (bpl + 7) & ~7;   /* alignment */
  57         cdt = ch->cdt;
  58         lines = ch->fifo_size / bpl;
  59
  60         if (lines > 4)
  61                 lines = 4;
  62
  63         BUG_ON(lines < 2);
  64
  65         /* write CDT */
  66         for (i = 0; i < lines; i++) {
  67                 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
  68                 cx_write(cdt + 16 * i + 4, 0);
  69                 cx_write(cdt + 16 * i + 8, 0);
  70                 cx_write(cdt + 16 * i + 12, 0);
  71         }
  72
  73         /* write CMDS */
  74         cx_write(ch->cmds_start + 0, risc);
  75
  76         cx_write(ch->cmds_start + 4, 0);
  77         cx_write(ch->cmds_start + 8, cdt);
  78         cx_write(ch->cmds_start + 12, (lines * 16) >> 3);
  79         cx_write(ch->cmds_start + 16, ch->ctrl_start);
  80
  81         cx_write(ch->cmds_start + 20, VID_IQ_SIZE_DW);
  82
  83         for (i = 24; i < 80; i += 4)
  84                 cx_write(ch->cmds_start + i, 0);
  85
  86         /* fill registers */
  87         cx_write(ch->ptr1_reg, ch->fifo_start);
  88         cx_write(ch->ptr2_reg, cdt);
  89         cx_write(ch->cnt2_reg, (lines * 16) >> 3);
  90         cx_write(ch->cnt1_reg, (bpl >> 3) - 1);
  91
  92         return 0;
  93 }
  94
  95 static __le32 *cx25821_update_riscprogram(struct cx25821_channel *chan,
  96                                           __le32 *rp, unsigned int offset,
  97                                           unsigned int bpl, u32 sync_line,
  98                                           unsigned int lines, int fifo_enable,
  99                                           int field_type)
 100 {
 101         struct cx25821_video_out_data *out = chan->out;
 102         unsigned int line, i;
 103         int dist_betwn_starts = bpl * 2;
 104
 105         *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
 106
 107         if (USE_RISC_NOOP_VIDEO) {
 108                 for (i = 0; i < NUM_NO_OPS; i++)
 109                         *(rp++) = cpu_to_le32(RISC_NOOP);
 110         }
 111
 112         /* scan lines */
 113         for (line = 0; line < lines; line++) {
 114                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
 115                 *(rp++) = cpu_to_le32(out->_data_buf_phys_addr + offset);
 116                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
 117
 118                 if ((lines <= NTSC_FIELD_HEIGHT)
 119                     || (line < (NTSC_FIELD_HEIGHT - 1)) || !(out->is_60hz)) {
 120                         offset += dist_betwn_starts;
 121                 }
 122         }
 123
 124         return rp;
 125 }
 126
 127 static __le32 *cx25821_risc_field_upstream(struct cx25821_channel *chan, __le32 *rp,
 128                                            dma_addr_t databuf_phys_addr,
 129                                            unsigned int offset, u32 sync_line,
 130                                            unsigned int bpl, unsigned int lines,
 131                                            int fifo_enable, int field_type)
 132 {
 133         struct cx25821_video_out_data *out = chan->out;
 134         unsigned int line, i;
 135         const struct sram_channel *sram_ch = chan->sram_channels;
 136         int dist_betwn_starts = bpl * 2;
 137
 138         /* sync instruction */
 139         if (sync_line != NO_SYNC_LINE)
 140                 *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
 141
 142         if (USE_RISC_NOOP_VIDEO) {
 143                 for (i = 0; i < NUM_NO_OPS; i++)
 144                         *(rp++) = cpu_to_le32(RISC_NOOP);
 145         }
 146
 147         /* scan lines */
 148         for (line = 0; line < lines; line++) {
 149                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
 150                 *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
 151                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
 152
 153                 if ((lines <= NTSC_FIELD_HEIGHT)
 154                     || (line < (NTSC_FIELD_HEIGHT - 1)) || !(out->is_60hz))
 155                         /* to skip the other field line */
 156                         offset += dist_betwn_starts;
 157
 158                 /* check if we need to enable the FIFO after the first 4 lines
 159                  * For the upstream video channel, the risc engine will enable
 160                  * the FIFO. */
 161                 if (fifo_enable && line == 3) {
 162                         *(rp++) = RISC_WRITECR;
 163                         *(rp++) = sram_ch->dma_ctl;
 164                         *(rp++) = FLD_VID_FIFO_EN;
 165                         *(rp++) = 0x00000001;
 166                 }
 167         }
 168
 169         return rp;
 170 }
 171
 172 static int cx25821_risc_buffer_upstream(struct cx25821_channel *chan,
 173                                         struct pci_dev *pci,
 174                                         unsigned int top_offset,
 175                                         unsigned int bpl, unsigned int lines)
 176 {
 177         struct cx25821_video_out_data *out = chan->out;
 178         __le32 *rp;
 179         int fifo_enable = 0;
 180         /* get line count for single field */
 181         int singlefield_lines = lines >> 1;
 182         int odd_num_lines = singlefield_lines;
 183         int frame = 0;
 184         int frame_size = 0;
 185         int databuf_offset = 0;
 186         int risc_program_size = 0;
 187         int risc_flag = RISC_CNT_RESET;
 188         unsigned int bottom_offset = bpl;
 189         dma_addr_t risc_phys_jump_addr;
 190
 191         if (out->is_60hz) {
 192                 odd_num_lines = singlefield_lines + 1;
 193                 risc_program_size = FRAME1_VID_PROG_SIZE;
 194                 frame_size = (bpl == Y411_LINE_SZ) ?
 195                         FRAME_SIZE_NTSC_Y411 : FRAME_SIZE_NTSC_Y422;
 196         } else {
 197                 risc_program_size = PAL_VID_PROG_SIZE;
 198                 frame_size = (bpl == Y411_LINE_SZ) ?
 199                         FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 200         }
 201
 202         /* Virtual address of Risc buffer program */
 203         rp = out->_dma_virt_addr;
 204
 205         for (frame = 0; frame < NUM_FRAMES; frame++) {
 206                 databuf_offset = frame_size * frame;
 207
 208                 if (UNSET != top_offset) {
 209                         fifo_enable = (frame == 0) ? FIFO_ENABLE : FIFO_DISABLE;
 210                         rp = cx25821_risc_field_upstream(chan, rp,
 211                                         out->_data_buf_phys_addr +
 212                                         databuf_offset, top_offset, 0, bpl,
 213                                         odd_num_lines, fifo_enable, ODD_FIELD);
 214                 }
 215
 216                 fifo_enable = FIFO_DISABLE;
 217
 218                 /* Even Field */
 219                 rp = cx25821_risc_field_upstream(chan, rp,
 220                                                  out->_data_buf_phys_addr +
 221                                                  databuf_offset, bottom_offset,
 222                                                  0x200, bpl, singlefield_lines,
 223                                                  fifo_enable, EVEN_FIELD);
 224
 225                 if (frame == 0) {
 226                         risc_flag = RISC_CNT_RESET;
 227                         risc_phys_jump_addr = out->_dma_phys_start_addr +
 228                                 risc_program_size;
 229                 } else {
 230                         risc_phys_jump_addr = out->_dma_phys_start_addr;
 231                         risc_flag = RISC_CNT_INC;
 232                 }
 233
 234                 /* Loop to 2ndFrameRISC or to Start of Risc
 235                  * program & generate IRQ
 236                  */
 237                 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
 238                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 239                 *(rp++) = cpu_to_le32(0);
 240         }
 241
 242         return 0;
 243 }
 244
 245 void cx25821_stop_upstream_video(struct cx25821_channel *chan)
 246 {
 247         struct cx25821_video_out_data *out = chan->out;
 248         struct cx25821_dev *dev = chan->dev;
 249         const struct sram_channel *sram_ch = chan->sram_channels;
 250         u32 tmp = 0;
 251
 252         if (!out->_is_running) {
 253                 pr_info("No video file is currently running so return!\n");
 254                 return;
 255         }
 256
 257         /* Set the interrupt mask register, disable irq. */
 258         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) & ~(1 << sram_ch->irq_bit));
 259
 260         /* Disable RISC interrupts */
 261         tmp = cx_read(sram_ch->int_msk);
 262         cx_write(sram_ch->int_msk, tmp & ~_intr_msk);
 263
 264         /* Turn OFF risc and fifo enable */
 265         tmp = cx_read(sram_ch->dma_ctl);
 266         cx_write(sram_ch->dma_ctl, tmp & ~(FLD_VID_FIFO_EN | FLD_VID_RISC_EN));
 267
 268         free_irq(dev->pci->irq, chan);
 269
 270         /* Clear data buffer memory */
 271         if (out->_data_buf_virt_addr)
 272                 memset(out->_data_buf_virt_addr, 0, out->_data_buf_size);
 273
 274         out->_is_running = 0;
 275         out->_is_first_frame = 0;
 276         out->_frame_count = 0;
 277         out->_file_status = END_OF_FILE;
 278
 279         tmp = cx_read(VID_CH_MODE_SEL);
 280         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
 281 }
 282
 283 void cx25821_free_mem_upstream(struct cx25821_channel *chan)
 284 {
 285         struct cx25821_video_out_data *out = chan->out;
 286         struct cx25821_dev *dev = chan->dev;
 287
 288         if (out->_is_running)
 289                 cx25821_stop_upstream_video(chan);
 290
 291         if (out->_dma_virt_addr) {
 292                 pci_free_consistent(dev->pci, out->_risc_size,
 293                                     out->_dma_virt_addr, out->_dma_phys_addr);
 294                 out->_dma_virt_addr = NULL;
 295         }
 296
 297         if (out->_data_buf_virt_addr) {
 298                 pci_free_consistent(dev->pci, out->_data_buf_size,
 299                                     out->_data_buf_virt_addr,
 300                                     out->_data_buf_phys_addr);
 301                 out->_data_buf_virt_addr = NULL;
 302         }
 303 }
 304
 305 int cx25821_write_frame(struct cx25821_channel *chan,
 306                 const char __user *data, size_t count)
 307 {
 308         struct cx25821_video_out_data *out = chan->out;
 309         int line_size = (out->_pixel_format == PIXEL_FRMT_411) ?
 310                 Y411_LINE_SZ : Y422_LINE_SZ;
 311         int frame_size = 0;
 312         int frame_offset = 0;
 313         int curpos = out->curpos;
 314
 315         if (out->is_60hz)
 316                 frame_size = (line_size == Y411_LINE_SZ) ?
 317                         FRAME_SIZE_NTSC_Y411 : FRAME_SIZE_NTSC_Y422;
 318         else
 319                 frame_size = (line_size == Y411_LINE_SZ) ?
 320                         FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
 321
 322         if (curpos == 0) {
 323                 out->cur_frame_index = out->_frame_index;
 324                 if (wait_event_interruptible(out->waitq, out->cur_frame_index != out->_frame_index))
 325                         return -EINTR;
 326                 out->cur_frame_index = out->_frame_index;
 327         }
 328
 329         frame_offset = out->cur_frame_index ? frame_size : 0;
 330
 331         if (frame_size - curpos < count)
 332                 count = frame_size - curpos;
 333         memcpy((char *)out->_data_buf_virt_addr + frame_offset + curpos,
 334                         data, count);
 335         curpos += count;
 336         if (curpos == frame_size) {
 337                 out->_frame_count++;
 338                 curpos = 0;
 339         }
 340         out->curpos = curpos;
 341
 342         return count;
 343 }
 344
 345 static int cx25821_upstream_buffer_prepare(struct cx25821_channel *chan,
 346                                            const struct sram_channel *sram_ch,
 347                                            int bpl)
 348 {
 349         struct cx25821_video_out_data *out = chan->out;
 350         struct cx25821_dev *dev = chan->dev;
 351         int ret = 0;
 352         dma_addr_t dma_addr;
 353         dma_addr_t data_dma_addr;
 354
 355         if (out->_dma_virt_addr != NULL)
 356                 pci_free_consistent(dev->pci, out->upstream_riscbuf_size,
 357                                 out->_dma_virt_addr, out->_dma_phys_addr);
 358
 359         out->_dma_virt_addr = pci_alloc_consistent(dev->pci,
 360                         out->upstream_riscbuf_size, &dma_addr);
 361         out->_dma_virt_start_addr = out->_dma_virt_addr;
 362         out->_dma_phys_start_addr = dma_addr;
 363         out->_dma_phys_addr = dma_addr;
 364         out->_risc_size = out->upstream_riscbuf_size;
 365
 366         if (!out->_dma_virt_addr) {
 367                 pr_err("FAILED to allocate memory for Risc buffer! Returning\n");
 368                 return -ENOMEM;
 369         }
 370
 371         /* Clear memory at address */
 372         memset(out->_dma_virt_addr, 0, out->_risc_size);
 373
 374         if (out->_data_buf_virt_addr != NULL)
 375                 pci_free_consistent(dev->pci, out->upstream_databuf_size,
 376                                 out->_data_buf_virt_addr,
 377                                 out->_data_buf_phys_addr);
 378         /* For Video Data buffer allocation */
 379         out->_data_buf_virt_addr = pci_alloc_consistent(dev->pci,
 380                         out->upstream_databuf_size, &data_dma_addr);
 381         out->_data_buf_phys_addr = data_dma_addr;
 382         out->_data_buf_size = out->upstream_databuf_size;
 383
 384         if (!out->_data_buf_virt_addr) {
 385                 pr_err("FAILED to allocate memory for data buffer! Returning\n");
 386                 return -ENOMEM;
 387         }
 388
 389         /* Clear memory at address */
 390         memset(out->_data_buf_virt_addr, 0, out->_data_buf_size);
 391
 392         /* Create RISC programs */
 393         ret = cx25821_risc_buffer_upstream(chan, dev->pci, 0, bpl,
 394                         out->_lines_count);
 395         if (ret < 0) {
 396                 pr_info("Failed creating Video Upstream Risc programs!\n");
 397                 goto error;
 398         }
 399
 400         return 0;
 401
 402 error:
 403         return ret;
 404 }
 405
 406 static int cx25821_video_upstream_irq(struct cx25821_channel *chan, u32 status)
 407 {
 408         struct cx25821_video_out_data *out = chan->out;
 409         struct cx25821_dev *dev = chan->dev;
 410         u32 int_msk_tmp;
 411         const struct sram_channel *channel = chan->sram_channels;
 412         int singlefield_lines = NTSC_FIELD_HEIGHT;
 413         int line_size_in_bytes = Y422_LINE_SZ;
 414         int odd_risc_prog_size = 0;
 415         dma_addr_t risc_phys_jump_addr;
 416         __le32 *rp;
 417
 418         if (status & FLD_VID_SRC_RISC1) {
 419                 /* We should only process one program per call */
 420                 u32 prog_cnt = cx_read(channel->gpcnt);
 421
 422                 /* Since we've identified our IRQ, clear our bits from the
 423                  * interrupt mask and interrupt status registers */
 424                 int_msk_tmp = cx_read(channel->int_msk);
 425                 cx_write(channel->int_msk, int_msk_tmp & ~_intr_msk);
 426                 cx_write(channel->int_stat, _intr_msk);
 427
 428                 wake_up(&out->waitq);
 429
 430                 spin_lock(&dev->slock);
 431
 432                 out->_frame_index = prog_cnt;
 433
 434                 if (out->_is_first_frame) {
 435                         out->_is_first_frame = 0;
 436
 437                         if (out->is_60hz) {
 438                                 singlefield_lines += 1;
 439                                 odd_risc_prog_size = ODD_FLD_NTSC_PROG_SIZE;
 440                         } else {
 441                                 singlefield_lines = PAL_FIELD_HEIGHT;
 442                                 odd_risc_prog_size = ODD_FLD_PAL_PROG_SIZE;
 443                         }
 444
 445                         if (out->_dma_virt_start_addr != NULL) {
 446                                 line_size_in_bytes =
 447                                     (out->_pixel_format ==
 448                                      PIXEL_FRMT_411) ? Y411_LINE_SZ :
 449                                     Y422_LINE_SZ;
 450                                 risc_phys_jump_addr =
 451                                     out->_dma_phys_start_addr +
 452                                     odd_risc_prog_size;
 453
 454                                 rp = cx25821_update_riscprogram(chan,
 455                                         out->_dma_virt_start_addr, TOP_OFFSET,
 456                                         line_size_in_bytes, 0x0,
 457                                         singlefield_lines, FIFO_DISABLE,
 458                                         ODD_FIELD);
 459
 460                                 /* Jump to Even Risc program of 1st Frame */
 461                                 *(rp++) = cpu_to_le32(RISC_JUMP);
 462                                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
 463                                 *(rp++) = cpu_to_le32(0);
 464                         }
 465                 }
 466
 467                 spin_unlock(&dev->slock);
 468         } else {
 469                 if (status & FLD_VID_SRC_UF)
 470                         pr_err("%s(): Video Received Underflow Error Interrupt!\n",
 471                                __func__);
 472
 473                 if (status & FLD_VID_SRC_SYNC)
 474                         pr_err("%s(): Video Received Sync Error Interrupt!\n",
 475                                __func__);
 476
 477                 if (status & FLD_VID_SRC_OPC_ERR)
 478                         pr_err("%s(): Video Received OpCode Error Interrupt!\n",
 479                                __func__);
 480         }
 481
 482         if (out->_file_status == END_OF_FILE) {
 483                 pr_err("EOF Channel 1 Framecount = %d\n", out->_frame_count);
 484                 return -1;
 485         }
 486         /* ElSE, set the interrupt mask register, re-enable irq. */
 487         int_msk_tmp = cx_read(channel->int_msk);
 488         cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
 489
 490         return 0;
 491 }
 492
 493 static irqreturn_t cx25821_upstream_irq(int irq, void *dev_id)
 494 {
 495         struct cx25821_channel *chan = dev_id;
 496         struct cx25821_dev *dev = chan->dev;
 497         u32 vid_status;
 498         int handled = 0;
 499         const struct sram_channel *sram_ch;
 500
 501         if (!dev)
 502                 return -1;
 503
 504         sram_ch = chan->sram_channels;
 505
 506         vid_status = cx_read(sram_ch->int_stat);
 507
 508         /* Only deal with our interrupt */
 509         if (vid_status)
 510                 handled = cx25821_video_upstream_irq(chan, vid_status);
 511
 512         return IRQ_RETVAL(handled);
 513 }
 514
 515 static void cx25821_set_pixelengine(struct cx25821_channel *chan,
 516                                     const struct sram_channel *ch,
 517                                     int pix_format)
 518 {
 519         struct cx25821_video_out_data *out = chan->out;
 520         struct cx25821_dev *dev = chan->dev;
 521         int width = WIDTH_D1;
 522         int height = out->_lines_count;
 523         int num_lines, odd_num_lines;
 524         u32 value;
 525         int vip_mode = OUTPUT_FRMT_656;
 526
 527         value = ((pix_format & 0x3) << 12) | (vip_mode & 0x7);
 528         value &= 0xFFFFFFEF;
 529         value |= out->is_60hz ? 0 : 0x10;
 530         cx_write(ch->vid_fmt_ctl, value);
 531
 532         /* set number of active pixels in each line.
 533          * Default is 720 pixels in both NTSC and PAL format */
 534         cx_write(ch->vid_active_ctl1, width);
 535
 536         num_lines = (height / 2) & 0x3FF;
 537         odd_num_lines = num_lines;
 538
 539         if (out->is_60hz)
 540                 odd_num_lines += 1;
 541
 542         value = (num_lines << 16) | odd_num_lines;
 543
 544         /* set number of active lines in field 0 (top) and field 1 (bottom) */
 545         cx_write(ch->vid_active_ctl2, value);
 546
 547         cx_write(ch->vid_cdt_size, VID_CDT_SIZE >> 3);
 548 }
 549
 550 static int cx25821_start_video_dma_upstream(struct cx25821_channel *chan,
 551                                             const struct sram_channel *sram_ch)
 552 {
 553         struct cx25821_video_out_data *out = chan->out;
 554         struct cx25821_dev *dev = chan->dev;
 555         u32 tmp = 0;
 556         int err = 0;
 557
 558         /* 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for
 559          * channel A-C
 560          */
 561         tmp = cx_read(VID_CH_MODE_SEL);
 562         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 563
 564         /* Set the physical start address of the RISC program in the initial
 565          * program counter(IPC) member of the cmds.
 566          */
 567         cx_write(sram_ch->cmds_start + 0, out->_dma_phys_addr);
 568         /* Risc IPC High 64 bits 63-32 */
 569         cx_write(sram_ch->cmds_start + 4, 0);
 570
 571         /* reset counter */
 572         cx_write(sram_ch->gpcnt_ctl, 3);
 573
 574         /* Clear our bits from the interrupt status register. */
 575         cx_write(sram_ch->int_stat, _intr_msk);
 576
 577         /* Set the interrupt mask register, enable irq. */
 578         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
 579         tmp = cx_read(sram_ch->int_msk);
 580         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
 581
 582         err = request_irq(dev->pci->irq, cx25821_upstream_irq,
 583                         IRQF_SHARED, dev->name, chan);
 584         if (err < 0) {
 585                 pr_err("%s: can't get upstream IRQ %d\n",
 586                        dev->name, dev->pci->irq);
 587                 goto fail_irq;
 588         }
 589
 590         /* Start the DMA  engine */
 591         tmp = cx_read(sram_ch->dma_ctl);
 592         cx_set(sram_ch->dma_ctl, tmp | FLD_VID_RISC_EN);
 593
 594         out->_is_running = 1;
 595         out->_is_first_frame = 1;
 596
 597         return 0;
 598
 599 fail_irq:
 600         cx25821_dev_unregister(dev);
 601         return err;
 602 }
 603
 604 int cx25821_vidupstream_init(struct cx25821_channel *chan,
 605                                  int pixel_format)
 606 {
 607         struct cx25821_video_out_data *out = chan->out;
 608         struct cx25821_dev *dev = chan->dev;
 609         const struct sram_channel *sram_ch;
 610         u32 tmp;
 611         int err = 0;
 612         int data_frame_size = 0;
 613         int risc_buffer_size = 0;
 614
 615         if (out->_is_running) {
 616                 pr_info("Video Channel is still running so return!\n");
 617                 return 0;
 618         }
 619
 620         sram_ch = chan->sram_channels;
 621
 622         out->is_60hz = dev->tvnorm & V4L2_STD_525_60;
 623
 624         /* 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for
 625          * channel A-C
 626          */
 627         tmp = cx_read(VID_CH_MODE_SEL);
 628         cx_write(VID_CH_MODE_SEL, tmp | 0x1B0001FF);
 629
 630         out->_is_running = 0;
 631         out->_frame_count = 0;
 632         out->_file_status = RESET_STATUS;
 633         out->_lines_count = out->is_60hz ? 480 : 576;
 634         out->_pixel_format = pixel_format;
 635         out->_line_size = (out->_pixel_format == PIXEL_FRMT_422) ?
 636                 (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
 637         data_frame_size = out->is_60hz ? NTSC_DATA_BUF_SZ : PAL_DATA_BUF_SZ;
 638         risc_buffer_size = out->is_60hz ?
 639                 NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
 640
 641         out->_is_running = 0;
 642         out->_frame_count = 0;
 643         out->_file_status = RESET_STATUS;
 644         out->_lines_count = out->is_60hz ? 480 : 576;
 645         out->_pixel_format = pixel_format;
 646         out->_line_size = (out->_pixel_format == PIXEL_FRMT_422) ?
 647                 (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
 648         out->curpos = 0;
 649         init_waitqueue_head(&out->waitq);
 650
 651         err = cx25821_sram_channel_setup_upstream(dev, sram_ch,
 652                         out->_line_size, 0);
 653
 654         /* setup fifo + format */
 655         cx25821_set_pixelengine(chan, sram_ch, out->_pixel_format);
 656
 657         out->upstream_riscbuf_size = risc_buffer_size * 2;
 658         out->upstream_databuf_size = data_frame_size * 2;
 659
 660         /* Allocating buffers and prepare RISC program */
 661         err = cx25821_upstream_buffer_prepare(chan, sram_ch, out->_line_size);
 662         if (err < 0) {
 663                 pr_err("%s: Failed to set up Video upstream buffers!\n",
 664                        dev->name);
 665                 goto error;
 666         }
 667
 668         cx25821_start_video_dma_upstream(chan, sram_ch);
 669
 670         return 0;
 671
 672 error:
 673         cx25821_dev_unregister(dev);
 674
 675         return err;
 676 }