1 /* 2 * 3 * 4 * Copyright (C) 2005 Mike Isely <isely@pobox.com> 5 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr> 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 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/device.h> // for linux/firmware.h 23 #include <linux/firmware.h> 24 #include "pvrusb2-util.h" 25 #include "pvrusb2-encoder.h" 26 #include "pvrusb2-hdw-internal.h" 27 #include "pvrusb2-debug.h" 28 #include "pvrusb2-fx2-cmd.h" 29 30 31 32 /* Firmware mailbox flags - definitions found from ivtv */ 33 #define IVTV_MBOX_FIRMWARE_DONE 0x00000004 34 #define IVTV_MBOX_DRIVER_DONE 0x00000002 35 #define IVTV_MBOX_DRIVER_BUSY 0x00000001 36 37 #define MBOX_BASE 0x44 38 39 40 static int pvr2_encoder_write_words(struct pvr2_hdw *hdw, 41 unsigned int offs, 42 const u32 *data, unsigned int dlen) 43 { 44 unsigned int idx,addr; 45 unsigned int bAddr; 46 int ret; 47 unsigned int chunkCnt; 48 49 /* 50 51 Format: First byte must be 0x01. Remaining 32 bit words are 52 spread out into chunks of 7 bytes each, with the first 4 bytes 53 being the data word (little endian), and the next 3 bytes 54 being the address where that data word is to be written (big 55 endian). Repeat request for additional words, with offset 56 adjusted accordingly. 57 58 */ 59 while (dlen) { 60 chunkCnt = 8; 61 if (chunkCnt > dlen) chunkCnt = dlen; 62 memset(hdw->cmd_buffer,0,sizeof(hdw->cmd_buffer)); 63 bAddr = 0; 64 hdw->cmd_buffer[bAddr++] = FX2CMD_MEM_WRITE_DWORD; 65 for (idx = 0; idx < chunkCnt; idx++) { 66 addr = idx + offs; 67 hdw->cmd_buffer[bAddr+6] = (addr & 0xffu); 68 hdw->cmd_buffer[bAddr+5] = ((addr>>8) & 0xffu); 69 hdw->cmd_buffer[bAddr+4] = ((addr>>16) & 0xffu); 70 PVR2_DECOMPOSE_LE(hdw->cmd_buffer, bAddr,data[idx]); 71 bAddr += 7; 72 } 73 ret = pvr2_send_request(hdw, 74 hdw->cmd_buffer,1+(chunkCnt*7), 75 NULL,0); 76 if (ret) return ret; 77 data += chunkCnt; 78 dlen -= chunkCnt; 79 offs += chunkCnt; 80 } 81 82 return 0; 83 } 84 85 86 static int pvr2_encoder_read_words(struct pvr2_hdw *hdw, 87 unsigned int offs, 88 u32 *data, unsigned int dlen) 89 { 90 unsigned int idx; 91 int ret; 92 unsigned int chunkCnt; 93 94 /* 95 96 Format: First byte must be 0x02 (status check) or 0x28 (read 97 back block of 32 bit words). Next 6 bytes must be zero, 98 followed by a single byte of MBOX_BASE+offset for portion to 99 be read. Returned data is packed set of 32 bits words that 100 were read. 101 102 */ 103 104 while (dlen) { 105 chunkCnt = 16; 106 if (chunkCnt > dlen) chunkCnt = dlen; 107 if (chunkCnt < 16) chunkCnt = 1; 108 hdw->cmd_buffer[0] = 109 ((chunkCnt == 1) ? 110 FX2CMD_MEM_READ_DWORD : FX2CMD_MEM_READ_64BYTES); 111 hdw->cmd_buffer[1] = 0; 112 hdw->cmd_buffer[2] = 0; 113 hdw->cmd_buffer[3] = 0; 114 hdw->cmd_buffer[4] = 0; 115 hdw->cmd_buffer[5] = ((offs>>16) & 0xffu); 116 hdw->cmd_buffer[6] = ((offs>>8) & 0xffu); 117 hdw->cmd_buffer[7] = (offs & 0xffu); 118 ret = pvr2_send_request(hdw, 119 hdw->cmd_buffer,8, 120 hdw->cmd_buffer, 121 (chunkCnt == 1 ? 4 : 16 * 4)); 122 if (ret) return ret; 123 124 for (idx = 0; idx < chunkCnt; idx++) { 125 data[idx] = PVR2_COMPOSE_LE(hdw->cmd_buffer,idx*4); 126 } 127 data += chunkCnt; 128 dlen -= chunkCnt; 129 offs += chunkCnt; 130 } 131 132 return 0; 133 } 134 135 136 /* This prototype is set up to be compatible with the 137 cx2341x_mbox_func prototype in cx2341x.h, which should be in 138 kernels 2.6.18 or later. We do this so that we can enable 139 cx2341x.ko to write to our encoder (by handing it a pointer to this 140 function). For earlier kernels this doesn't really matter. */ 141 static int pvr2_encoder_cmd(void *ctxt, 142 u32 cmd, 143 int arg_cnt_send, 144 int arg_cnt_recv, 145 u32 *argp) 146 { 147 unsigned int poll_count; 148 unsigned int try_count = 0; 149 int retry_flag; 150 int ret = 0; 151 unsigned int idx; 152 /* These sizes look to be limited by the FX2 firmware implementation */ 153 u32 wrData[16]; 154 u32 rdData[16]; 155 struct pvr2_hdw *hdw = (struct pvr2_hdw *)ctxt; 156 157 158 /* 159 160 The encoder seems to speak entirely using blocks 32 bit words. 161 In ivtv driver terms, this is a mailbox at MBOX_BASE which we 162 populate with data and watch what the hardware does with it. 163 The first word is a set of flags used to control the 164 transaction, the second word is the command to execute, the 165 third byte is zero (ivtv driver suggests that this is some 166 kind of return value), and the fourth byte is a specified 167 timeout (windows driver always uses 0x00060000 except for one 168 case when it is zero). All successive words are the argument 169 words for the command. 170 171 First, write out the entire set of words, with the first word 172 being zero. 173 174 Next, write out just the first word again, but set it to 175 IVTV_MBOX_DRIVER_DONE | IVTV_DRIVER_BUSY this time (which 176 probably means "go"). 177 178 Next, read back the return count words. Check the first word, 179 which should have IVTV_MBOX_FIRMWARE_DONE set. If however 180 that bit is not set, then the command isn't done so repeat the 181 read until it is set. 182 183 Finally, write out just the first word again, but set it to 184 0x0 this time (which probably means "idle"). 185 186 */ 187 188 if (arg_cnt_send > (ARRAY_SIZE(wrData) - 4)) { 189 pvr2_trace( 190 PVR2_TRACE_ERROR_LEGS, 191 "Failed to write cx23416 command" 192 " - too many input arguments" 193 " (was given %u limit %lu)", 194 arg_cnt_send, (long unsigned) ARRAY_SIZE(wrData) - 4); 195 return -EINVAL; 196 } 197 198 if (arg_cnt_recv > (ARRAY_SIZE(rdData) - 4)) { 199 pvr2_trace( 200 PVR2_TRACE_ERROR_LEGS, 201 "Failed to write cx23416 command" 202 " - too many return arguments" 203 " (was given %u limit %lu)", 204 arg_cnt_recv, (long unsigned) ARRAY_SIZE(rdData) - 4); 205 return -EINVAL; 206 } 207 208 209 LOCK_TAKE(hdw->ctl_lock); do { 210 211 if (!hdw->state_encoder_ok) { 212 ret = -EIO; 213 break; 214 } 215 216 retry_flag = 0; 217 try_count++; 218 ret = 0; 219 wrData[0] = 0; 220 wrData[1] = cmd; 221 wrData[2] = 0; 222 wrData[3] = 0x00060000; 223 for (idx = 0; idx < arg_cnt_send; idx++) { 224 wrData[idx+4] = argp[idx]; 225 } 226 for (; idx < ARRAY_SIZE(wrData) - 4; idx++) { 227 wrData[idx+4] = 0; 228 } 229 230 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,idx); 231 if (ret) break; 232 wrData[0] = IVTV_MBOX_DRIVER_DONE|IVTV_MBOX_DRIVER_BUSY; 233 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1); 234 if (ret) break; 235 poll_count = 0; 236 while (1) { 237 poll_count++; 238 ret = pvr2_encoder_read_words(hdw,MBOX_BASE,rdData, 239 arg_cnt_recv+4); 240 if (ret) { 241 break; 242 } 243 if (rdData[0] & IVTV_MBOX_FIRMWARE_DONE) { 244 break; 245 } 246 if (rdData[0] && (poll_count < 1000)) continue; 247 if (!rdData[0]) { 248 retry_flag = !0; 249 pvr2_trace( 250 PVR2_TRACE_ERROR_LEGS, 251 "Encoder timed out waiting for us" 252 "; arranging to retry"); 253 } else { 254 pvr2_trace( 255 PVR2_TRACE_ERROR_LEGS, 256 "***WARNING*** device's encoder" 257 " appears to be stuck" 258 " (status=0x%08x)",rdData[0]); 259 } 260 pvr2_trace( 261 PVR2_TRACE_ERROR_LEGS, 262 "Encoder command: 0x%02x",cmd); 263 for (idx = 4; idx < arg_cnt_send; idx++) { 264 pvr2_trace( 265 PVR2_TRACE_ERROR_LEGS, 266 "Encoder arg%d: 0x%08x", 267 idx-3,wrData[idx]); 268 } 269 ret = -EBUSY; 270 break; 271 } 272 if (retry_flag) { 273 if (try_count < 20) continue; 274 pvr2_trace( 275 PVR2_TRACE_ERROR_LEGS, 276 "Too many retries..."); 277 ret = -EBUSY; 278 } 279 if (ret) { 280 del_timer_sync(&hdw->encoder_run_timer); 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 if (hdw->state_encoder_runok) { 287 hdw->state_encoder_runok = 0; 288 pvr2_trace(PVR2_TRACE_STBITS, 289 "State bit %s <-- %s", 290 "state_encoder_runok", 291 (hdw->state_encoder_runok ? 292 "true" : "false")); 293 } 294 pvr2_trace( 295 PVR2_TRACE_ERROR_LEGS, 296 "Giving up on command." 297 " This is normally recovered via a firmware" 298 " reload and re-initialization; concern" 299 " is only warranted if this happens repeatedly" 300 " and rapidly."); 301 break; 302 } 303 wrData[0] = 0x7; 304 for (idx = 0; idx < arg_cnt_recv; idx++) { 305 argp[idx] = rdData[idx+4]; 306 } 307 308 wrData[0] = 0x0; 309 ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1); 310 if (ret) break; 311 312 } while(0); LOCK_GIVE(hdw->ctl_lock); 313 314 return ret; 315 } 316 317 318 static int pvr2_encoder_vcmd(struct pvr2_hdw *hdw, int cmd, 319 int args, ...) 320 { 321 va_list vl; 322 unsigned int idx; 323 u32 data[12]; 324 325 if (args > ARRAY_SIZE(data)) { 326 pvr2_trace( 327 PVR2_TRACE_ERROR_LEGS, 328 "Failed to write cx23416 command" 329 " - too many arguments" 330 " (was given %u limit %lu)", 331 args, (long unsigned) ARRAY_SIZE(data)); 332 return -EINVAL; 333 } 334 335 va_start(vl, args); 336 for (idx = 0; idx < args; idx++) { 337 data[idx] = va_arg(vl, u32); 338 } 339 va_end(vl); 340 341 return pvr2_encoder_cmd(hdw,cmd,args,0,data); 342 } 343 344 345 /* This implements some extra setup for the encoder that seems to be 346 specific to the PVR USB2 hardware. */ 347 static int pvr2_encoder_prep_config(struct pvr2_hdw *hdw) 348 { 349 int ret = 0; 350 int encMisc3Arg = 0; 351 352 #if 0 353 /* This inexplicable bit happens in the Hauppauge windows 354 driver (for both 24xxx and 29xxx devices). However I 355 currently see no difference in behavior with or without 356 this stuff. Leave this here as a note of its existence, 357 but don't use it. */ 358 LOCK_TAKE(hdw->ctl_lock); do { 359 u32 dat[1]; 360 dat[0] = 0x80000640; 361 pvr2_encoder_write_words(hdw,0x01fe,dat,1); 362 pvr2_encoder_write_words(hdw,0x023e,dat,1); 363 } while(0); LOCK_GIVE(hdw->ctl_lock); 364 #endif 365 366 /* Mike Isely <isely@pobox.com> 26-Jan-2006 The windows driver 367 sends the following list of ENC_MISC commands (for both 368 24xxx and 29xxx devices). Meanings are not entirely clear, 369 however without the ENC_MISC(3,1) command then we risk 370 random perpetual video corruption whenever the video input 371 breaks up for a moment (like when switching channels). */ 372 373 374 #if 0 375 /* This ENC_MISC(5,0) command seems to hurt 29xxx sync 376 performance on channel changes, but is not a problem on 377 24xxx devices. */ 378 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 5,0,0,0); 379 #endif 380 381 /* This ENC_MISC(3,encMisc3Arg) command is critical - without 382 it there will eventually be video corruption. Also, the 383 saa7115 case is strange - the Windows driver is passing 1 384 regardless of device type but if we have 1 for saa7115 385 devices the video turns sluggish. */ 386 if (hdw->hdw_desc->flag_has_cx25840) { 387 encMisc3Arg = 1; 388 } else { 389 encMisc3Arg = 0; 390 } 391 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 3, 392 encMisc3Arg,0,0); 393 394 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 8,0,0,0); 395 396 #if 0 397 /* This ENC_MISC(4,1) command is poisonous, so it is commented 398 out. But I'm leaving it here anyway to document its 399 existence in the Windows driver. The effect of this 400 command is that apps displaying the stream become sluggish 401 with stuttering video. */ 402 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 4,1,0,0); 403 #endif 404 405 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 0,3,0,0); 406 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4,15,0,0,0); 407 408 /* prevent the PTSs from slowly drifting away in the generated 409 MPEG stream */ 410 ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC, 2, 4, 1); 411 412 return ret; 413 } 414 415 int pvr2_encoder_adjust(struct pvr2_hdw *hdw) 416 { 417 int ret; 418 ret = cx2341x_update(hdw,pvr2_encoder_cmd, 419 (hdw->enc_cur_valid ? &hdw->enc_cur_state : NULL), 420 &hdw->enc_ctl_state); 421 if (ret) { 422 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 423 "Error from cx2341x module code=%d",ret); 424 } else { 425 hdw->enc_cur_state = hdw->enc_ctl_state; 426 hdw->enc_cur_valid = !0; 427 } 428 return ret; 429 } 430 431 432 int pvr2_encoder_configure(struct pvr2_hdw *hdw) 433 { 434 int ret; 435 int val; 436 pvr2_trace(PVR2_TRACE_ENCODER,"pvr2_encoder_configure" 437 " (cx2341x module)"); 438 hdw->enc_ctl_state.port = CX2341X_PORT_STREAMING; 439 hdw->enc_ctl_state.width = hdw->res_hor_val; 440 hdw->enc_ctl_state.height = hdw->res_ver_val; 441 hdw->enc_ctl_state.is_50hz = ((hdw->std_mask_cur & V4L2_STD_525_60) ? 442 0 : 1); 443 444 ret = 0; 445 446 ret |= pvr2_encoder_prep_config(hdw); 447 448 /* saa7115: 0xf0 */ 449 val = 0xf0; 450 if (hdw->hdw_desc->flag_has_cx25840) { 451 /* ivtv cx25840: 0x140 */ 452 val = 0x140; 453 } 454 455 if (!ret) ret = pvr2_encoder_vcmd( 456 hdw,CX2341X_ENC_SET_NUM_VSYNC_LINES, 2, 457 val, val); 458 459 /* setup firmware to notify us about some events (don't know why...) */ 460 if (!ret) ret = pvr2_encoder_vcmd( 461 hdw,CX2341X_ENC_SET_EVENT_NOTIFICATION, 4, 462 0, 0, 0x10000000, 0xffffffff); 463 464 if (!ret) ret = pvr2_encoder_vcmd( 465 hdw,CX2341X_ENC_SET_VBI_LINE, 5, 466 0xffffffff,0,0,0,0); 467 468 if (ret) { 469 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 470 "Failed to configure cx23416"); 471 return ret; 472 } 473 474 ret = pvr2_encoder_adjust(hdw); 475 if (ret) return ret; 476 477 ret = pvr2_encoder_vcmd( 478 hdw, CX2341X_ENC_INITIALIZE_INPUT, 0); 479 480 if (ret) { 481 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 482 "Failed to initialize cx23416 video input"); 483 return ret; 484 } 485 486 return 0; 487 } 488 489 490 int pvr2_encoder_start(struct pvr2_hdw *hdw) 491 { 492 int status; 493 494 /* unmask some interrupts */ 495 pvr2_write_register(hdw, 0x0048, 0xbfffffff); 496 497 pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1, 498 hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0); 499 500 switch (hdw->active_stream_type) { 501 case pvr2_config_vbi: 502 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2, 503 0x01,0x14); 504 break; 505 case pvr2_config_mpeg: 506 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2, 507 0,0x13); 508 break; 509 default: /* Unhandled cases for now */ 510 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2, 511 0,0x13); 512 break; 513 } 514 return status; 515 } 516 517 int pvr2_encoder_stop(struct pvr2_hdw *hdw) 518 { 519 int status; 520 521 /* mask all interrupts */ 522 pvr2_write_register(hdw, 0x0048, 0xffffffff); 523 524 switch (hdw->active_stream_type) { 525 case pvr2_config_vbi: 526 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3, 527 0x01,0x01,0x14); 528 break; 529 case pvr2_config_mpeg: 530 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3, 531 0x01,0,0x13); 532 break; 533 default: /* Unhandled cases for now */ 534 status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3, 535 0x01,0,0x13); 536 break; 537 } 538 539 return status; 540 } 541 542 543 /* 544 Stuff for Emacs to see, in order to encourage consistent editing style: 545 *** Local Variables: *** 546 *** mode: c *** 547 *** fill-column: 70 *** 548 *** tab-width: 8 *** 549 *** c-basic-offset: 8 *** 550 *** End: *** 551 */ 552