drivers/media/video/pvrusb2/pvrusb2-encoder.c

   1 /*
   2  *
   3  *  $Id$
   4  *
   5  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   6  *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License
  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  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 #include <linux/device.h>   // for linux/firmware.h
  24 #include <linux/firmware.h>
  25 #include "pvrusb2-util.h"
  26 #include "pvrusb2-encoder.h"
  27 #include "pvrusb2-hdw-internal.h"
  28 #include "pvrusb2-debug.h"
  29 #include "pvrusb2-fx2-cmd.h"
  30
  31
  32
  33 /* Firmware mailbox flags - definitions found from ivtv */
  34 #define IVTV_MBOX_FIRMWARE_DONE 0x00000004
  35 #define IVTV_MBOX_DRIVER_DONE 0x00000002
  36 #define IVTV_MBOX_DRIVER_BUSY 0x00000001
  37
  38 #define MBOX_BASE 0x44
  39
  40
  41 static int pvr2_encoder_write_words(struct pvr2_hdw *hdw,
  42                                     unsigned int offs,
  43                                     const u32 *data, unsigned int dlen)
  44 {
  45         unsigned int idx,addr;
  46         unsigned int bAddr;
  47         int ret;
  48         unsigned int chunkCnt;
  49
  50         /*
  51
  52         Format: First byte must be 0x01.  Remaining 32 bit words are
  53         spread out into chunks of 7 bytes each, with the first 4 bytes
  54         being the data word (little endian), and the next 3 bytes
  55         being the address where that data word is to be written (big
  56         endian).  Repeat request for additional words, with offset
  57         adjusted accordingly.
  58
  59         */
  60         while (dlen) {
  61                 chunkCnt = 8;
  62                 if (chunkCnt > dlen) chunkCnt = dlen;
  63                 memset(hdw->cmd_buffer,0,sizeof(hdw->cmd_buffer));
  64                 bAddr = 0;
  65                 hdw->cmd_buffer[bAddr++] = FX2CMD_MEM_WRITE_DWORD;
  66                 for (idx = 0; idx < chunkCnt; idx++) {
  67                         addr = idx + offs;
  68                         hdw->cmd_buffer[bAddr+6] = (addr & 0xffu);
  69                         hdw->cmd_buffer[bAddr+5] = ((addr>>8) & 0xffu);
  70                         hdw->cmd_buffer[bAddr+4] = ((addr>>16) & 0xffu);
  71                         PVR2_DECOMPOSE_LE(hdw->cmd_buffer, bAddr,data[idx]);
  72                         bAddr += 7;
  73                 }
  74                 ret = pvr2_send_request(hdw,
  75                                         hdw->cmd_buffer,1+(chunkCnt*7),
  76                                         NULL,0);
  77                 if (ret) return ret;
  78                 data += chunkCnt;
  79                 dlen -= chunkCnt;
  80                 offs += chunkCnt;
  81         }
  82
  83         return 0;
  84 }
  85
  86
  87 static int pvr2_encoder_read_words(struct pvr2_hdw *hdw,
  88                                    unsigned int offs,
  89                                    u32 *data, unsigned int dlen)
  90 {
  91         unsigned int idx;
  92         int ret;
  93         unsigned int chunkCnt;
  94
  95         /*
  96
  97         Format: First byte must be 0x02 (status check) or 0x28 (read
  98         back block of 32 bit words).  Next 6 bytes must be zero,
  99         followed by a single byte of MBOX_BASE+offset for portion to
 100         be read.  Returned data is packed set of 32 bits words that
 101         were read.
 102
 103         */
 104
 105         while (dlen) {
 106                 chunkCnt = 16;
 107                 if (chunkCnt > dlen) chunkCnt = dlen;
 108                 if (chunkCnt < 16) chunkCnt = 1;
 109                 hdw->cmd_buffer[0] =
 110                         ((chunkCnt == 1) ?
 111                          FX2CMD_MEM_READ_DWORD : FX2CMD_MEM_READ_64BYTES);
 112                 hdw->cmd_buffer[1] = 0;
 113                 hdw->cmd_buffer[2] = 0;
 114                 hdw->cmd_buffer[3] = 0;
 115                 hdw->cmd_buffer[4] = 0;
 116                 hdw->cmd_buffer[5] = ((offs>>16) & 0xffu);
 117                 hdw->cmd_buffer[6] = ((offs>>8) & 0xffu);
 118                 hdw->cmd_buffer[7] = (offs & 0xffu);
 119                 ret = pvr2_send_request(hdw,
 120                                         hdw->cmd_buffer,8,
 121                                         hdw->cmd_buffer,
 122                                         (chunkCnt == 1 ? 4 : 16 * 4));
 123                 if (ret) return ret;
 124
 125                 for (idx = 0; idx < chunkCnt; idx++) {
 126                         data[idx] = PVR2_COMPOSE_LE(hdw->cmd_buffer,idx*4);
 127                 }
 128                 data += chunkCnt;
 129                 dlen -= chunkCnt;
 130                 offs += chunkCnt;
 131         }
 132
 133         return 0;
 134 }
 135
 136
 137 /* This prototype is set up to be compatible with the
 138    cx2341x_mbox_func prototype in cx2341x.h, which should be in
 139    kernels 2.6.18 or later.  We do this so that we can enable
 140    cx2341x.ko to write to our encoder (by handing it a pointer to this
 141    function).  For earlier kernels this doesn't really matter. */
 142 static int pvr2_encoder_cmd(void *ctxt,
 143                             u32 cmd,
 144                             int arg_cnt_send,
 145                             int arg_cnt_recv,
 146                             u32 *argp)
 147 {
 148         unsigned int poll_count;
 149         unsigned int try_count = 0;
 150         int retry_flag;
 151         int ret = 0;
 152         unsigned int idx;
 153         /* These sizes look to be limited by the FX2 firmware implementation */
 154         u32 wrData[16];
 155         u32 rdData[16];
 156         struct pvr2_hdw *hdw = (struct pvr2_hdw *)ctxt;
 157
 158
 159         /*
 160
 161         The encoder seems to speak entirely using blocks 32 bit words.
 162         In ivtv driver terms, this is a mailbox at MBOX_BASE which we
 163         populate with data and watch what the hardware does with it.
 164         The first word is a set of flags used to control the
 165         transaction, the second word is the command to execute, the
 166         third byte is zero (ivtv driver suggests that this is some
 167         kind of return value), and the fourth byte is a specified
 168         timeout (windows driver always uses 0x00060000 except for one
 169         case when it is zero).  All successive words are the argument
 170         words for the command.
 171
 172         First, write out the entire set of words, with the first word
 173         being zero.
 174
 175         Next, write out just the first word again, but set it to
 176         IVTV_MBOX_DRIVER_DONE | IVTV_DRIVER_BUSY this time (which
 177         probably means "go").
 178
 179         Next, read back the return count words.  Check the first word,
 180         which should have IVTV_MBOX_FIRMWARE_DONE set.  If however
 181         that bit is not set, then the command isn't done so repeat the
 182         read until it is set.
 183
 184         Finally, write out just the first word again, but set it to
 185         0x0 this time (which probably means "idle").
 186
 187         */
 188
 189         if (arg_cnt_send > (ARRAY_SIZE(wrData) - 4)) {
 190                 pvr2_trace(
 191                         PVR2_TRACE_ERROR_LEGS,
 192                         "Failed to write cx23416 command"
 193                         " - too many input arguments"
 194                         " (was given %u limit %lu)",
 195                         arg_cnt_send, (long unsigned) ARRAY_SIZE(wrData) - 4);
 196                 return -EINVAL;
 197         }
 198
 199         if (arg_cnt_recv > (ARRAY_SIZE(rdData) - 4)) {
 200                 pvr2_trace(
 201                         PVR2_TRACE_ERROR_LEGS,
 202                         "Failed to write cx23416 command"
 203                         " - too many return arguments"
 204                         " (was given %u limit %lu)",
 205                         arg_cnt_recv, (long unsigned) ARRAY_SIZE(rdData) - 4);
 206                 return -EINVAL;
 207         }
 208
 209
 210         LOCK_TAKE(hdw->ctl_lock); do {
 211
 212                 if (!hdw->state_encoder_ok) {
 213                         ret = -EIO;
 214                         break;
 215                 }
 216
 217                 retry_flag = 0;
 218                 try_count++;
 219                 ret = 0;
 220                 wrData[0] = 0;
 221                 wrData[1] = cmd;
 222                 wrData[2] = 0;
 223                 wrData[3] = 0x00060000;
 224                 for (idx = 0; idx < arg_cnt_send; idx++) {
 225                         wrData[idx+4] = argp[idx];
 226                 }
 227                 for (; idx < ARRAY_SIZE(wrData) - 4; idx++) {
 228                         wrData[idx+4] = 0;
 229                 }
 230
 231                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,idx);
 232                 if (ret) break;
 233                 wrData[0] = IVTV_MBOX_DRIVER_DONE|IVTV_MBOX_DRIVER_BUSY;
 234                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
 235                 if (ret) break;
 236                 poll_count = 0;
 237                 while (1) {
 238                         poll_count++;
 239                         ret = pvr2_encoder_read_words(hdw,MBOX_BASE,rdData,
 240                                                       arg_cnt_recv+4);
 241                         if (ret) {
 242                                 break;
 243                         }
 244                         if (rdData[0] & IVTV_MBOX_FIRMWARE_DONE) {
 245                                 break;
 246                         }
 247                         if (rdData[0] && (poll_count < 1000)) continue;
 248                         if (!rdData[0]) {
 249                                 retry_flag = !0;
 250                                 pvr2_trace(
 251                                         PVR2_TRACE_ERROR_LEGS,
 252                                         "Encoder timed out waiting for us"
 253                                         "; arranging to retry");
 254                         } else {
 255                                 pvr2_trace(
 256                                         PVR2_TRACE_ERROR_LEGS,
 257                                         "***WARNING*** device's encoder"
 258                                         " appears to be stuck"
 259                                         " (status=0x%08x)",rdData[0]);
 260                         }
 261                         pvr2_trace(
 262                                 PVR2_TRACE_ERROR_LEGS,
 263                                 "Encoder command: 0x%02x",cmd);
 264                         for (idx = 4; idx < arg_cnt_send; idx++) {
 265                                 pvr2_trace(
 266                                         PVR2_TRACE_ERROR_LEGS,
 267                                         "Encoder arg%d: 0x%08x",
 268                                         idx-3,wrData[idx]);
 269                         }
 270                         ret = -EBUSY;
 271                         break;
 272                 }
 273                 if (retry_flag) {
 274                         if (try_count < 20) continue;
 275                         pvr2_trace(
 276                                 PVR2_TRACE_ERROR_LEGS,
 277                                 "Too many retries...");
 278                         ret = -EBUSY;
 279                 }
 280                 if (ret) {
 281                         hdw->state_encoder_ok = 0;
 282                         pvr2_trace(PVR2_TRACE_STBITS,
 283                                    "State bit %s <-- %s",
 284                                    "state_encoder_ok",
 285                                    (hdw->state_encoder_ok ? "true" : "false"));
 286                         pvr2_trace(
 287                                 PVR2_TRACE_ERROR_LEGS,
 288                                 "Giving up on command."
 289                                 "  This is normally recovered by the driver.");
 290                         break;
 291                 }
 292                 wrData[0] = 0x7;
 293                 for (idx = 0; idx < arg_cnt_recv; idx++) {
 294                         argp[idx] = rdData[idx+4];
 295                 }
 296
 297                 wrData[0] = 0x0;
 298                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
 299                 if (ret) break;
 300
 301         } while(0); LOCK_GIVE(hdw->ctl_lock);
 302
 303         return ret;
 304 }
 305
 306
 307 static int pvr2_encoder_vcmd(struct pvr2_hdw *hdw, int cmd,
 308                              int args, ...)
 309 {
 310         va_list vl;
 311         unsigned int idx;
 312         u32 data[12];
 313
 314         if (args > ARRAY_SIZE(data)) {
 315                 pvr2_trace(
 316                         PVR2_TRACE_ERROR_LEGS,
 317                         "Failed to write cx23416 command"
 318                         " - too many arguments"
 319                         " (was given %u limit %lu)",
 320                         args, (long unsigned) ARRAY_SIZE(data));
 321                 return -EINVAL;
 322         }
 323
 324         va_start(vl, args);
 325         for (idx = 0; idx < args; idx++) {
 326                 data[idx] = va_arg(vl, u32);
 327         }
 328         va_end(vl);
 329
 330         return pvr2_encoder_cmd(hdw,cmd,args,0,data);
 331 }
 332
 333
 334 /* This implements some extra setup for the encoder that seems to be
 335    specific to the PVR USB2 hardware. */
 336 static int pvr2_encoder_prep_config(struct pvr2_hdw *hdw)
 337 {
 338         int ret = 0;
 339         int encMisc3Arg = 0;
 340
 341 #if 0
 342         /* This inexplicable bit happens in the Hauppage windows
 343            driver (for both 24xxx and 29xxx devices).  However I
 344            currently see no difference in behavior with or without
 345            this stuff.  Leave this here as a note of its existence,
 346            but don't use it. */
 347         LOCK_TAKE(hdw->ctl_lock); do {
 348                 u32 dat[1];
 349                 dat[0] = 0x80000640;
 350                 pvr2_encoder_write_words(hdw,0x01fe,dat,1);
 351                 pvr2_encoder_write_words(hdw,0x023e,dat,1);
 352         } while(0); LOCK_GIVE(hdw->ctl_lock);
 353 #endif
 354
 355         /* Mike Isely <isely@pobox.com> 26-Jan-2006 The windows driver
 356            sends the following list of ENC_MISC commands (for both
 357            24xxx and 29xxx devices).  Meanings are not entirely clear,
 358            however without the ENC_MISC(3,1) command then we risk
 359            random perpetual video corruption whenever the video input
 360            breaks up for a moment (like when switching channels). */
 361
 362
 363 #if 0
 364         /* This ENC_MISC(5,0) command seems to hurt 29xxx sync
 365            performance on channel changes, but is not a problem on
 366            24xxx devices. */
 367         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 5,0,0,0);
 368 #endif
 369
 370         /* This ENC_MISC(3,encMisc3Arg) command is critical - without
 371            it there will eventually be video corruption.  Also, the
 372            saa7115 case is strange - the Windows driver is passing 1
 373            regardless of device type but if we have 1 for saa7115
 374            devices the video turns sluggish.  */
 375         if (hdw->hdw_desc->flag_has_cx25840) {
 376                 encMisc3Arg = 1;
 377         } else {
 378                 encMisc3Arg = 0;
 379         }
 380         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 3,
 381                                  encMisc3Arg,0,0);
 382
 383         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 8,0,0,0);
 384
 385 #if 0
 386         /* This ENC_MISC(4,1) command is poisonous, so it is commented
 387            out.  But I'm leaving it here anyway to document its
 388            existence in the Windows driver.  The effect of this
 389            command is that apps displaying the stream become sluggish
 390            with stuttering video. */
 391         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 4,1,0,0);
 392 #endif
 393
 394         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 0,3,0,0);
 395         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4,15,0,0,0);
 396
 397         return ret;
 398 }
 399
 400 int pvr2_encoder_adjust(struct pvr2_hdw *hdw)
 401 {
 402         int ret;
 403         ret = cx2341x_update(hdw,pvr2_encoder_cmd,
 404                              (hdw->enc_cur_valid ? &hdw->enc_cur_state : NULL),
 405                              &hdw->enc_ctl_state);
 406         if (ret) {
 407                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 408                            "Error from cx2341x module code=%d",ret);
 409         } else {
 410                 memcpy(&hdw->enc_cur_state,&hdw->enc_ctl_state,
 411                        sizeof(struct cx2341x_mpeg_params));
 412                 hdw->enc_cur_valid = !0;
 413         }
 414         return ret;
 415 }
 416
 417
 418 int pvr2_encoder_configure(struct pvr2_hdw *hdw)
 419 {
 420         int ret;
 421         int val;
 422         pvr2_trace(PVR2_TRACE_ENCODER,"pvr2_encoder_configure"
 423                    " (cx2341x module)");
 424         hdw->enc_ctl_state.port = CX2341X_PORT_STREAMING;
 425         hdw->enc_ctl_state.width = hdw->res_hor_val;
 426         hdw->enc_ctl_state.height = hdw->res_ver_val;
 427         hdw->enc_ctl_state.is_50hz = ((hdw->std_mask_cur & V4L2_STD_525_60) ?
 428                                       0 : 1);
 429
 430         ret = 0;
 431
 432         ret |= pvr2_encoder_prep_config(hdw);
 433
 434         /* saa7115: 0xf0 */
 435         val = 0xf0;
 436         if (hdw->hdw_desc->flag_has_cx25840) {
 437                 /* ivtv cx25840: 0x140 */
 438                 val = 0x140;
 439         }
 440
 441         if (!ret) ret = pvr2_encoder_vcmd(
 442                 hdw,CX2341X_ENC_SET_NUM_VSYNC_LINES, 2,
 443                 val, val);
 444
 445         /* setup firmware to notify us about some events (don't know why...) */
 446         if (!ret) ret = pvr2_encoder_vcmd(
 447                 hdw,CX2341X_ENC_SET_EVENT_NOTIFICATION, 4,
 448                 0, 0, 0x10000000, 0xffffffff);
 449
 450         if (!ret) ret = pvr2_encoder_vcmd(
 451                 hdw,CX2341X_ENC_SET_VBI_LINE, 5,
 452                 0xffffffff,0,0,0,0);
 453
 454         if (ret) {
 455                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 456                            "Failed to configure cx23416");
 457                 return ret;
 458         }
 459
 460         ret = pvr2_encoder_adjust(hdw);
 461         if (ret) return ret;
 462
 463         ret = pvr2_encoder_vcmd(
 464                 hdw, CX2341X_ENC_INITIALIZE_INPUT, 0);
 465
 466         if (ret) {
 467                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 468                            "Failed to initialize cx23416 video input");
 469                 return ret;
 470         }
 471
 472         return 0;
 473 }
 474
 475
 476 int pvr2_encoder_start(struct pvr2_hdw *hdw)
 477 {
 478         int status;
 479
 480         /* unmask some interrupts */
 481         pvr2_write_register(hdw, 0x0048, 0xbfffffff);
 482
 483         pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
 484                           hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
 485
 486         switch (hdw->active_stream_type) {
 487         case pvr2_config_vbi:
 488                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 489                                            0x01,0x14);
 490                 break;
 491         case pvr2_config_mpeg:
 492                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 493                                            0,0x13);
 494                 break;
 495         default: /* Unhandled cases for now */
 496                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 497                                            0,0x13);
 498                 break;
 499         }
 500         return status;
 501 }
 502
 503 int pvr2_encoder_stop(struct pvr2_hdw *hdw)
 504 {
 505         int status;
 506
 507         /* mask all interrupts */
 508         pvr2_write_register(hdw, 0x0048, 0xffffffff);
 509
 510         switch (hdw->active_stream_type) {
 511         case pvr2_config_vbi:
 512                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 513                                            0x01,0x01,0x14);
 514                 break;
 515         case pvr2_config_mpeg:
 516                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 517                                            0x01,0,0x13);
 518                 break;
 519         default: /* Unhandled cases for now */
 520                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 521                                            0x01,0,0x13);
 522                 break;
 523         }
 524
 525         return status;
 526 }
 527
 528
 529 /*
 530   Stuff for Emacs to see, in order to encourage consistent editing style:
 531   *** Local Variables: ***
 532   *** mode: c ***
 533   *** fill-column: 70 ***
 534   *** tab-width: 8 ***
 535   *** c-basic-offset: 8 ***
 536   *** End: ***
 537   */