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                             int 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                 retry_flag = 0;
 213                 try_count++;
 214                 ret = 0;
 215                 wrData[0] = 0;
 216                 wrData[1] = cmd;
 217                 wrData[2] = 0;
 218                 wrData[3] = 0x00060000;
 219                 for (idx = 0; idx < arg_cnt_send; idx++) {
 220                         wrData[idx+4] = argp[idx];
 221                 }
 222                 for (; idx < ARRAY_SIZE(wrData) - 4; idx++) {
 223                         wrData[idx+4] = 0;
 224                 }
 225
 226                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,idx);
 227                 if (ret) break;
 228                 wrData[0] = IVTV_MBOX_DRIVER_DONE|IVTV_MBOX_DRIVER_BUSY;
 229                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
 230                 if (ret) break;
 231                 poll_count = 0;
 232                 while (1) {
 233                         poll_count++;
 234                         ret = pvr2_encoder_read_words(hdw,MBOX_BASE,rdData,
 235                                                       arg_cnt_recv+4);
 236                         if (ret) {
 237                                 break;
 238                         }
 239                         if (rdData[0] & IVTV_MBOX_FIRMWARE_DONE) {
 240                                 break;
 241                         }
 242                         if (rdData[0] && (poll_count < 1000)) continue;
 243                         if (!rdData[0]) {
 244                                 retry_flag = !0;
 245                                 pvr2_trace(
 246                                         PVR2_TRACE_ERROR_LEGS,
 247                                         "Encoder timed out waiting for us"
 248                                         "; arranging to retry");
 249                         } else {
 250                                 pvr2_trace(
 251                                         PVR2_TRACE_ERROR_LEGS,
 252                                         "***WARNING*** device's encoder"
 253                                         " appears to be stuck"
 254                                         " (status=0x%08x)",rdData[0]);
 255                         }
 256                         pvr2_trace(
 257                                 PVR2_TRACE_ERROR_LEGS,
 258                                 "Encoder command: 0x%02x",cmd);
 259                         for (idx = 4; idx < arg_cnt_send; idx++) {
 260                                 pvr2_trace(
 261                                         PVR2_TRACE_ERROR_LEGS,
 262                                         "Encoder arg%d: 0x%08x",
 263                                         idx-3,wrData[idx]);
 264                         }
 265                         ret = -EBUSY;
 266                         break;
 267                 }
 268                 if (retry_flag) {
 269                         if (try_count < 20) continue;
 270                         pvr2_trace(
 271                                 PVR2_TRACE_ERROR_LEGS,
 272                                 "Too many retries...");
 273                         ret = -EBUSY;
 274                 }
 275                 if (ret) {
 276                         pvr2_trace(
 277                                 PVR2_TRACE_ERROR_LEGS,
 278                                 "Giving up on command."
 279                                 "  It is likely that"
 280                                 " this is a bad idea...");
 281                         break;
 282                 }
 283                 wrData[0] = 0x7;
 284                 for (idx = 0; idx < arg_cnt_recv; idx++) {
 285                         argp[idx] = rdData[idx+4];
 286                 }
 287
 288                 wrData[0] = 0x0;
 289                 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
 290                 if (ret) break;
 291
 292         } while(0); LOCK_GIVE(hdw->ctl_lock);
 293
 294         return ret;
 295 }
 296
 297
 298 static int pvr2_encoder_vcmd(struct pvr2_hdw *hdw, int cmd,
 299                              int args, ...)
 300 {
 301         va_list vl;
 302         unsigned int idx;
 303         u32 data[12];
 304
 305         if (args > ARRAY_SIZE(data)) {
 306                 pvr2_trace(
 307                         PVR2_TRACE_ERROR_LEGS,
 308                         "Failed to write cx23416 command"
 309                         " - too many arguments"
 310                         " (was given %u limit %lu)",
 311                         args, (long unsigned) ARRAY_SIZE(data));
 312                 return -EINVAL;
 313         }
 314
 315         va_start(vl, args);
 316         for (idx = 0; idx < args; idx++) {
 317                 data[idx] = va_arg(vl, u32);
 318         }
 319         va_end(vl);
 320
 321         return pvr2_encoder_cmd(hdw,cmd,args,0,data);
 322 }
 323
 324
 325 /* This implements some extra setup for the encoder that seems to be
 326    specific to the PVR USB2 hardware. */
 327 static int pvr2_encoder_prep_config(struct pvr2_hdw *hdw)
 328 {
 329         int ret = 0;
 330         int encMisc3Arg = 0;
 331
 332 #if 0
 333         /* This inexplicable bit happens in the Hauppage windows
 334            driver (for both 24xxx and 29xxx devices).  However I
 335            currently see no difference in behavior with or without
 336            this stuff.  Leave this here as a note of its existence,
 337            but don't use it. */
 338         LOCK_TAKE(hdw->ctl_lock); do {
 339                 u32 dat[1];
 340                 dat[0] = 0x80000640;
 341                 pvr2_encoder_write_words(hdw,0x01fe,dat,1);
 342                 pvr2_encoder_write_words(hdw,0x023e,dat,1);
 343         } while(0); LOCK_GIVE(hdw->ctl_lock);
 344 #endif
 345
 346         /* Mike Isely <isely@pobox.com> 26-Jan-2006 The windows driver
 347            sends the following list of ENC_MISC commands (for both
 348            24xxx and 29xxx devices).  Meanings are not entirely clear,
 349            however without the ENC_MISC(3,1) command then we risk
 350            random perpetual video corruption whenever the video input
 351            breaks up for a moment (like when switching channels). */
 352
 353
 354 #if 0
 355         /* This ENC_MISC(5,0) command seems to hurt 29xxx sync
 356            performance on channel changes, but is not a problem on
 357            24xxx devices. */
 358         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 5,0,0,0);
 359 #endif
 360
 361         /* This ENC_MISC(3,encMisc3Arg) command is critical - without
 362            it there will eventually be video corruption.  Also, the
 363            29xxx case is strange - the Windows driver is passing 1
 364            regardless of device type but if we have 1 for 29xxx device
 365            the video turns sluggish.  */
 366         switch (hdw->hdw_type) {
 367         case PVR2_HDW_TYPE_24XXX: encMisc3Arg = 1; break;
 368         case PVR2_HDW_TYPE_29XXX: encMisc3Arg = 0; break;
 369         default: break;
 370         }
 371         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 3,
 372                                  encMisc3Arg,0,0);
 373
 374         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 8,0,0,0);
 375
 376 #if 0
 377         /* This ENC_MISC(4,1) command is poisonous, so it is commented
 378            out.  But I'm leaving it here anyway to document its
 379            existence in the Windows driver.  The effect of this
 380            command is that apps displaying the stream become sluggish
 381            with stuttering video. */
 382         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 4,1,0,0);
 383 #endif
 384
 385         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 0,3,0,0);
 386         ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4,15,0,0,0);
 387
 388         return ret;
 389 }
 390
 391 int pvr2_encoder_configure(struct pvr2_hdw *hdw)
 392 {
 393         int ret;
 394         pvr2_trace(PVR2_TRACE_ENCODER,"pvr2_encoder_configure"
 395                    " (cx2341x module)");
 396         hdw->enc_ctl_state.port = CX2341X_PORT_STREAMING;
 397         hdw->enc_ctl_state.width = hdw->res_hor_val;
 398         hdw->enc_ctl_state.height = hdw->res_ver_val;
 399         hdw->enc_ctl_state.is_50hz = ((hdw->std_mask_cur &
 400                                        (V4L2_STD_NTSC|V4L2_STD_PAL_M)) ?
 401                                       0 : 1);
 402
 403         ret = 0;
 404
 405         ret |= pvr2_encoder_prep_config(hdw);
 406
 407         if (!ret) ret = pvr2_encoder_vcmd(
 408                 hdw,CX2341X_ENC_SET_NUM_VSYNC_LINES, 2,
 409                 0xf0, 0xf0);
 410
 411         /* setup firmware to notify us about some events (don't know why...) */
 412         if (!ret) ret = pvr2_encoder_vcmd(
 413                 hdw,CX2341X_ENC_SET_EVENT_NOTIFICATION, 4,
 414                 0, 0, 0x10000000, 0xffffffff);
 415
 416         if (!ret) ret = pvr2_encoder_vcmd(
 417                 hdw,CX2341X_ENC_SET_VBI_LINE, 5,
 418                 0xffffffff,0,0,0,0);
 419
 420         if (ret) {
 421                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 422                            "Failed to configure cx23416");
 423                 return ret;
 424         }
 425
 426         ret = cx2341x_update(hdw,pvr2_encoder_cmd,
 427                              (hdw->enc_cur_valid ? &hdw->enc_cur_state : NULL),
 428                              &hdw->enc_ctl_state);
 429         if (ret) {
 430                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 431                            "Error from cx2341x module code=%d",ret);
 432                 return ret;
 433         }
 434
 435         ret = 0;
 436
 437         if (!ret) ret = pvr2_encoder_vcmd(
 438                 hdw, CX2341X_ENC_INITIALIZE_INPUT, 0);
 439
 440         if (ret) {
 441                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 442                            "Failed to initialize cx23416 video input");
 443                 return ret;
 444         }
 445
 446         hdw->subsys_enabled_mask |= (1<<PVR2_SUBSYS_B_ENC_CFG);
 447         memcpy(&hdw->enc_cur_state,&hdw->enc_ctl_state,
 448                sizeof(struct cx2341x_mpeg_params));
 449         hdw->enc_cur_valid = !0;
 450         return 0;
 451 }
 452
 453
 454 int pvr2_encoder_start(struct pvr2_hdw *hdw)
 455 {
 456         int status;
 457
 458         /* unmask some interrupts */
 459         pvr2_write_register(hdw, 0x0048, 0xbfffffff);
 460
 461         /* change some GPIO data */
 462         pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000481);
 463         pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
 464
 465         pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
 466                           hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
 467
 468         switch (hdw->config) {
 469         case pvr2_config_vbi:
 470                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 471                                            0x01,0x14);
 472                 break;
 473         case pvr2_config_mpeg:
 474                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 475                                            0,0x13);
 476                 break;
 477         default: /* Unhandled cases for now */
 478                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
 479                                            0,0x13);
 480                 break;
 481         }
 482         if (!status) {
 483                 hdw->subsys_enabled_mask |= (1<<PVR2_SUBSYS_B_ENC_RUN);
 484         }
 485         return status;
 486 }
 487
 488 int pvr2_encoder_stop(struct pvr2_hdw *hdw)
 489 {
 490         int status;
 491
 492         /* mask all interrupts */
 493         pvr2_write_register(hdw, 0x0048, 0xffffffff);
 494
 495         switch (hdw->config) {
 496         case pvr2_config_vbi:
 497                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 498                                            0x01,0x01,0x14);
 499                 break;
 500         case pvr2_config_mpeg:
 501                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 502                                            0x01,0,0x13);
 503                 break;
 504         default: /* Unhandled cases for now */
 505                 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
 506                                            0x01,0,0x13);
 507                 break;
 508         }
 509
 510         /* change some GPIO data */
 511         /* Note: Bit d7 of dir appears to control the LED.  So we shut it
 512            off here. */
 513         pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000401);
 514         pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
 515
 516         if (!status) {
 517                 hdw->subsys_enabled_mask &= ~(1<<PVR2_SUBSYS_B_ENC_RUN);
 518         }
 519         return status;
 520 }
 521
 522
 523 /*
 524   Stuff for Emacs to see, in order to encourage consistent editing style:
 525   *** Local Variables: ***
 526   *** mode: c ***
 527   *** fill-column: 70 ***
 528   *** tab-width: 8 ***
 529   *** c-basic-offset: 8 ***
 530   *** End: ***
 531   */