drivers/media/pci/saa7164/saa7164-core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Driver for the NXP SAA7164 PCIe bridge
   4  *
   5  *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/list.h>
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/kmod.h>
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/debugfs.h>
  17 #include <linux/delay.h>
  18 #include <asm/div64.h>
  19
  20 #include "saa7164.h"
  21
  22 MODULE_DESCRIPTION("Driver for NXP SAA7164 based TV cards");
  23 MODULE_AUTHOR("Steven Toth <stoth@kernellabs.com>");
  24 MODULE_LICENSE("GPL");
  25
  26 /*
  27  *  1 Basic
  28  *  2
  29  *  4 i2c
  30  *  8 api
  31  * 16 cmd
  32  * 32 bus
  33  */
  34
  35 unsigned int saa_debug;
  36 module_param_named(debug, saa_debug, int, 0644);
  37 MODULE_PARM_DESC(debug, "enable debug messages");
  38
  39 static unsigned int fw_debug;
  40 module_param(fw_debug, int, 0644);
  41 MODULE_PARM_DESC(fw_debug, "Firmware debug level def:2");
  42
  43 unsigned int encoder_buffers = SAA7164_MAX_ENCODER_BUFFERS;
  44 module_param(encoder_buffers, int, 0644);
  45 MODULE_PARM_DESC(encoder_buffers, "Total buffers in read queue 16-512 def:64");
  46
  47 unsigned int vbi_buffers = SAA7164_MAX_VBI_BUFFERS;
  48 module_param(vbi_buffers, int, 0644);
  49 MODULE_PARM_DESC(vbi_buffers, "Total buffers in read queue 16-512 def:64");
  50
  51 unsigned int waitsecs = 10;
  52 module_param(waitsecs, int, 0644);
  53 MODULE_PARM_DESC(waitsecs, "timeout on firmware messages");
  54
  55 static unsigned int card[]  = {[0 ... (SAA7164_MAXBOARDS - 1)] = UNSET };
  56 module_param_array(card,  int, NULL, 0444);
  57 MODULE_PARM_DESC(card, "card type");
  58
  59 static unsigned int print_histogram = 64;
  60 module_param(print_histogram, int, 0644);
  61 MODULE_PARM_DESC(print_histogram, "print histogram values once");
  62
  63 unsigned int crc_checking = 1;
  64 module_param(crc_checking, int, 0644);
  65 MODULE_PARM_DESC(crc_checking, "enable crc sanity checking on buffers");
  66
  67 static unsigned int guard_checking = 1;
  68 module_param(guard_checking, int, 0644);
  69 MODULE_PARM_DESC(guard_checking,
  70         "enable dma sanity checking for buffer overruns");
  71
  72 static bool enable_msi = true;
  73 module_param(enable_msi, bool, 0444);
  74 MODULE_PARM_DESC(enable_msi,
  75                 "enable the use of an msi interrupt if available");
  76
  77 static unsigned int saa7164_devcount;
  78
  79 static DEFINE_MUTEX(devlist);
  80 LIST_HEAD(saa7164_devlist);
  81
  82 #define INT_SIZE 16
  83
  84 static void saa7164_pack_verifier(struct saa7164_buffer *buf)
  85 {
  86         u8 *p = (u8 *)buf->cpu;
  87         int i;
  88
  89         for (i = 0; i < buf->actual_size; i += 2048) {
  90
  91                 if ((*(p + i + 0) != 0x00) || (*(p + i + 1) != 0x00) ||
  92                         (*(p + i + 2) != 0x01) || (*(p + i + 3) != 0xBA)) {
  93                         printk(KERN_ERR "No pack at 0x%x\n", i);
  94 #if 0
  95                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1,
  96                                        p + 1, 32, false);
  97 #endif
  98                 }
  99         }
 100 }
 101
 102 #define FIXED_VIDEO_PID 0xf1
 103 #define FIXED_AUDIO_PID 0xf2
 104
 105 static void saa7164_ts_verifier(struct saa7164_buffer *buf)
 106 {
 107         struct saa7164_port *port = buf->port;
 108         u32 i;
 109         u8 cc, a;
 110         u16 pid;
 111         u8 *bufcpu = (u8 *)buf->cpu;
 112
 113         port->sync_errors = 0;
 114         port->v_cc_errors = 0;
 115         port->a_cc_errors = 0;
 116
 117         for (i = 0; i < buf->actual_size; i += 188) {
 118                 if (*(bufcpu + i) != 0x47)
 119                         port->sync_errors++;
 120
 121                 /* TODO: Query pid lower 8 bits, ignoring upper bits intensionally */
 122                 pid = ((*(bufcpu + i + 1) & 0x1f) << 8) | *(bufcpu + i + 2);
 123                 cc = *(bufcpu + i + 3) & 0x0f;
 124
 125                 if (pid == FIXED_VIDEO_PID) {
 126                         a = ((port->last_v_cc + 1) & 0x0f);
 127                         if (a != cc) {
 128                                 printk(KERN_ERR "video cc last = %x current = %x i = %d\n",
 129                                         port->last_v_cc, cc, i);
 130                                 port->v_cc_errors++;
 131                         }
 132
 133                         port->last_v_cc = cc;
 134                 } else
 135                 if (pid == FIXED_AUDIO_PID) {
 136                         a = ((port->last_a_cc + 1) & 0x0f);
 137                         if (a != cc) {
 138                                 printk(KERN_ERR "audio cc last = %x current = %x i = %d\n",
 139                                         port->last_a_cc, cc, i);
 140                                 port->a_cc_errors++;
 141                         }
 142
 143                         port->last_a_cc = cc;
 144                 }
 145
 146         }
 147
 148         /* Only report errors if we've been through this function at least
 149          * once already and the cached cc values are primed. First time through
 150          * always generates errors.
 151          */
 152         if (port->v_cc_errors && (port->done_first_interrupt > 1))
 153                 printk(KERN_ERR "video pid cc, %d errors\n", port->v_cc_errors);
 154
 155         if (port->a_cc_errors && (port->done_first_interrupt > 1))
 156                 printk(KERN_ERR "audio pid cc, %d errors\n", port->a_cc_errors);
 157
 158         if (port->sync_errors && (port->done_first_interrupt > 1))
 159                 printk(KERN_ERR "sync_errors = %d\n", port->sync_errors);
 160
 161         if (port->done_first_interrupt == 1)
 162                 port->done_first_interrupt++;
 163 }
 164
 165 static void saa7164_histogram_reset(struct saa7164_histogram *hg, char *name)
 166 {
 167         int i;
 168
 169         memset(hg, 0, sizeof(struct saa7164_histogram));
 170         strscpy(hg->name, name, sizeof(hg->name));
 171
 172         /* First 30ms x 1ms */
 173         for (i = 0; i < 30; i++)
 174                 hg->counter1[0 + i].val = i;
 175
 176         /* 30 - 200ms x 10ms  */
 177         for (i = 0; i < 18; i++)
 178                 hg->counter1[30 + i].val = 30 + (i * 10);
 179
 180         /* 200 - 2000ms x 100ms  */
 181         for (i = 0; i < 15; i++)
 182                 hg->counter1[48 + i].val = 200 + (i * 200);
 183
 184         /* Catch all massive value (2secs) */
 185         hg->counter1[55].val = 2000;
 186
 187         /* Catch all massive value (4secs) */
 188         hg->counter1[56].val = 4000;
 189
 190         /* Catch all massive value (8secs) */
 191         hg->counter1[57].val = 8000;
 192
 193         /* Catch all massive value (15secs) */
 194         hg->counter1[58].val = 15000;
 195
 196         /* Catch all massive value (30secs) */
 197         hg->counter1[59].val = 30000;
 198
 199         /* Catch all massive value (60secs) */
 200         hg->counter1[60].val = 60000;
 201
 202         /* Catch all massive value (5mins) */
 203         hg->counter1[61].val = 300000;
 204
 205         /* Catch all massive value (15mins) */
 206         hg->counter1[62].val = 900000;
 207
 208         /* Catch all massive values (1hr) */
 209         hg->counter1[63].val = 3600000;
 210 }
 211
 212 void saa7164_histogram_update(struct saa7164_histogram *hg, u32 val)
 213 {
 214         int i;
 215         for (i = 0; i < 64; i++) {
 216                 if (val <= hg->counter1[i].val) {
 217                         hg->counter1[i].count++;
 218                         hg->counter1[i].update_time = jiffies;
 219                         break;
 220                 }
 221         }
 222 }
 223
 224 static void saa7164_histogram_print(struct saa7164_port *port,
 225         struct saa7164_histogram *hg)
 226 {
 227         u32 entries = 0;
 228         int i;
 229
 230         printk(KERN_ERR "Histogram named %s (ms, count, last_update_jiffy)\n", hg->name);
 231         for (i = 0; i < 64; i++) {
 232                 if (hg->counter1[i].count == 0)
 233                         continue;
 234
 235                 printk(KERN_ERR " %4d %12d %Ld\n",
 236                         hg->counter1[i].val,
 237                         hg->counter1[i].count,
 238                         hg->counter1[i].update_time);
 239
 240                 entries++;
 241         }
 242         printk(KERN_ERR "Total: %d\n", entries);
 243 }
 244
 245 static void saa7164_work_enchandler_helper(struct saa7164_port *port, int bufnr)
 246 {
 247         struct saa7164_dev *dev = port->dev;
 248         struct saa7164_buffer *buf = NULL;
 249         struct saa7164_user_buffer *ubuf = NULL;
 250         struct list_head *c, *n;
 251         int i = 0;
 252         u8 *p;
 253
 254         mutex_lock(&port->dmaqueue_lock);
 255         list_for_each_safe(c, n, &port->dmaqueue.list) {
 256
 257                 buf = list_entry(c, struct saa7164_buffer, list);
 258                 if (i++ > port->hwcfg.buffercount) {
 259                         printk(KERN_ERR "%s() illegal i count %d\n",
 260                                 __func__, i);
 261                         break;
 262                 }
 263
 264                 if (buf->idx == bufnr) {
 265
 266                         /* Found the buffer, deal with it */
 267                         dprintk(DBGLVL_IRQ, "%s() bufnr: %d\n", __func__, bufnr);
 268
 269                         if (crc_checking) {
 270                                 /* Throw a new checksum on the dma buffer */
 271                                 buf->crc = crc32(0, buf->cpu, buf->actual_size);
 272                         }
 273
 274                         if (guard_checking) {
 275                                 p = (u8 *)buf->cpu;
 276                                 if ((*(p + buf->actual_size + 0) != 0xff) ||
 277                                         (*(p + buf->actual_size + 1) != 0xff) ||
 278                                         (*(p + buf->actual_size + 2) != 0xff) ||
 279                                         (*(p + buf->actual_size + 3) != 0xff) ||
 280                                         (*(p + buf->actual_size + 0x10) != 0xff) ||
 281                                         (*(p + buf->actual_size + 0x11) != 0xff) ||
 282                                         (*(p + buf->actual_size + 0x12) != 0xff) ||
 283                                         (*(p + buf->actual_size + 0x13) != 0xff)) {
 284                                                 printk(KERN_ERR "%s() buf %p guard buffer breach\n",
 285                                                         __func__, buf);
 286 #if 0
 287                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1,
 288                                        p + buf->actual_size - 32, 64, false);
 289 #endif
 290                                 }
 291                         }
 292
 293                         if ((port->nr != SAA7164_PORT_VBI1) && (port->nr != SAA7164_PORT_VBI2)) {
 294                                 /* Validate the incoming buffer content */
 295                                 if (port->encoder_params.stream_type == V4L2_MPEG_STREAM_TYPE_MPEG2_TS)
 296                                         saa7164_ts_verifier(buf);
 297                                 else if (port->encoder_params.stream_type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS)
 298                                         saa7164_pack_verifier(buf);
 299                         }
 300
 301                         /* find a free user buffer and clone to it */
 302                         if (!list_empty(&port->list_buf_free.list)) {
 303
 304                                 /* Pull the first buffer from the used list */
 305                                 ubuf = list_first_entry(&port->list_buf_free.list,
 306                                         struct saa7164_user_buffer, list);
 307
 308                                 if (buf->actual_size <= ubuf->actual_size) {
 309
 310                                         memcpy(ubuf->data, buf->cpu, ubuf->actual_size);
 311
 312                                         if (crc_checking) {
 313                                                 /* Throw a new checksum on the read buffer */
 314                                                 ubuf->crc = crc32(0, ubuf->data, ubuf->actual_size);
 315                                         }
 316
 317                                         /* Requeue the buffer on the free list */
 318                                         ubuf->pos = 0;
 319
 320                                         list_move_tail(&ubuf->list,
 321                                                 &port->list_buf_used.list);
 322
 323                                         /* Flag any userland waiters */
 324                                         wake_up_interruptible(&port->wait_read);
 325
 326                                 } else {
 327                                         printk(KERN_ERR "buf %p bufsize fails match\n", buf);
 328                                 }
 329
 330                         } else
 331                                 printk(KERN_ERR "encirq no free buffers, increase param encoder_buffers\n");
 332
 333                         /* Ensure offset into buffer remains 0, fill buffer
 334                          * with known bad data. We check for this data at a later point
 335                          * in time. */
 336                         saa7164_buffer_zero_offsets(port, bufnr);
 337                         memset(buf->cpu, 0xff, buf->pci_size);
 338                         if (crc_checking) {
 339                                 /* Throw yet aanother new checksum on the dma buffer */
 340                                 buf->crc = crc32(0, buf->cpu, buf->actual_size);
 341                         }
 342
 343                         break;
 344                 }
 345         }
 346         mutex_unlock(&port->dmaqueue_lock);
 347 }
 348
 349 static void saa7164_work_enchandler(struct work_struct *w)
 350 {
 351         struct saa7164_port *port =
 352                 container_of(w, struct saa7164_port, workenc);
 353         struct saa7164_dev *dev = port->dev;
 354
 355         u32 wp, mcb, rp;
 356
 357         port->last_svc_msecs_diff = port->last_svc_msecs;
 358         port->last_svc_msecs = jiffies_to_msecs(jiffies);
 359
 360         port->last_svc_msecs_diff = port->last_svc_msecs -
 361                 port->last_svc_msecs_diff;
 362
 363         saa7164_histogram_update(&port->svc_interval,
 364                 port->last_svc_msecs_diff);
 365
 366         port->last_irq_svc_msecs_diff = port->last_svc_msecs -
 367                 port->last_irq_msecs;
 368
 369         saa7164_histogram_update(&port->irq_svc_interval,
 370                 port->last_irq_svc_msecs_diff);
 371
 372         dprintk(DBGLVL_IRQ,
 373                 "%s() %Ldms elapsed irq->deferred %Ldms wp: %d rp: %d\n",
 374                 __func__,
 375                 port->last_svc_msecs_diff,
 376                 port->last_irq_svc_msecs_diff,
 377                 port->last_svc_wp,
 378                 port->last_svc_rp
 379                 );
 380
 381         /* Current write position */
 382         wp = saa7164_readl(port->bufcounter);
 383         if (wp > (port->hwcfg.buffercount - 1)) {
 384                 printk(KERN_ERR "%s() illegal buf count %d\n", __func__, wp);
 385                 return;
 386         }
 387
 388         /* Most current complete buffer */
 389         if (wp == 0)
 390                 mcb = (port->hwcfg.buffercount - 1);
 391         else
 392                 mcb = wp - 1;
 393
 394         while (1) {
 395                 if (port->done_first_interrupt == 0) {
 396                         port->done_first_interrupt++;
 397                         rp = mcb;
 398                 } else
 399                         rp = (port->last_svc_rp + 1) % 8;
 400
 401                 if (rp > (port->hwcfg.buffercount - 1)) {
 402                         printk(KERN_ERR "%s() illegal rp count %d\n", __func__, rp);
 403                         break;
 404                 }
 405
 406                 saa7164_work_enchandler_helper(port, rp);
 407                 port->last_svc_rp = rp;
 408
 409                 if (rp == mcb)
 410                         break;
 411         }
 412
 413         /* TODO: Convert this into a /proc/saa7164 style readable file */
 414         if (print_histogram == port->nr) {
 415                 saa7164_histogram_print(port, &port->irq_interval);
 416                 saa7164_histogram_print(port, &port->svc_interval);
 417                 saa7164_histogram_print(port, &port->irq_svc_interval);
 418                 saa7164_histogram_print(port, &port->read_interval);
 419                 saa7164_histogram_print(port, &port->poll_interval);
 420                 /* TODO: fix this to preserve any previous state */
 421                 print_histogram = 64 + port->nr;
 422         }
 423 }
 424
 425 static void saa7164_work_vbihandler(struct work_struct *w)
 426 {
 427         struct saa7164_port *port =
 428                 container_of(w, struct saa7164_port, workenc);
 429         struct saa7164_dev *dev = port->dev;
 430
 431         u32 wp, mcb, rp;
 432
 433         port->last_svc_msecs_diff = port->last_svc_msecs;
 434         port->last_svc_msecs = jiffies_to_msecs(jiffies);
 435         port->last_svc_msecs_diff = port->last_svc_msecs -
 436                 port->last_svc_msecs_diff;
 437
 438         saa7164_histogram_update(&port->svc_interval,
 439                 port->last_svc_msecs_diff);
 440
 441         port->last_irq_svc_msecs_diff = port->last_svc_msecs -
 442                 port->last_irq_msecs;
 443
 444         saa7164_histogram_update(&port->irq_svc_interval,
 445                 port->last_irq_svc_msecs_diff);
 446
 447         dprintk(DBGLVL_IRQ,
 448                 "%s() %Ldms elapsed irq->deferred %Ldms wp: %d rp: %d\n",
 449                 __func__,
 450                 port->last_svc_msecs_diff,
 451                 port->last_irq_svc_msecs_diff,
 452                 port->last_svc_wp,
 453                 port->last_svc_rp
 454                 );
 455
 456         /* Current write position */
 457         wp = saa7164_readl(port->bufcounter);
 458         if (wp > (port->hwcfg.buffercount - 1)) {
 459                 printk(KERN_ERR "%s() illegal buf count %d\n", __func__, wp);
 460                 return;
 461         }
 462
 463         /* Most current complete buffer */
 464         if (wp == 0)
 465                 mcb = (port->hwcfg.buffercount - 1);
 466         else
 467                 mcb = wp - 1;
 468
 469         while (1) {
 470                 if (port->done_first_interrupt == 0) {
 471                         port->done_first_interrupt++;
 472                         rp = mcb;
 473                 } else
 474                         rp = (port->last_svc_rp + 1) % 8;
 475
 476                 if (rp > (port->hwcfg.buffercount - 1)) {
 477                         printk(KERN_ERR "%s() illegal rp count %d\n", __func__, rp);
 478                         break;
 479                 }
 480
 481                 saa7164_work_enchandler_helper(port, rp);
 482                 port->last_svc_rp = rp;
 483
 484                 if (rp == mcb)
 485                         break;
 486         }
 487
 488         /* TODO: Convert this into a /proc/saa7164 style readable file */
 489         if (print_histogram == port->nr) {
 490                 saa7164_histogram_print(port, &port->irq_interval);
 491                 saa7164_histogram_print(port, &port->svc_interval);
 492                 saa7164_histogram_print(port, &port->irq_svc_interval);
 493                 saa7164_histogram_print(port, &port->read_interval);
 494                 saa7164_histogram_print(port, &port->poll_interval);
 495                 /* TODO: fix this to preserve any previous state */
 496                 print_histogram = 64 + port->nr;
 497         }
 498 }
 499
 500 static void saa7164_work_cmdhandler(struct work_struct *w)
 501 {
 502         struct saa7164_dev *dev = container_of(w, struct saa7164_dev, workcmd);
 503
 504         /* Wake up any complete commands */
 505         saa7164_irq_dequeue(dev);
 506 }
 507
 508 static void saa7164_buffer_deliver(struct saa7164_buffer *buf)
 509 {
 510         struct saa7164_port *port = buf->port;
 511
 512         /* Feed the transport payload into the kernel demux */
 513         dvb_dmx_swfilter_packets(&port->dvb.demux, (u8 *)buf->cpu,
 514                 SAA7164_TS_NUMBER_OF_LINES);
 515
 516 }
 517
 518 static irqreturn_t saa7164_irq_vbi(struct saa7164_port *port)
 519 {
 520         struct saa7164_dev *dev = port->dev;
 521
 522         /* Store old time */
 523         port->last_irq_msecs_diff = port->last_irq_msecs;
 524
 525         /* Collect new stats */
 526         port->last_irq_msecs = jiffies_to_msecs(jiffies);
 527
 528         /* Calculate stats */
 529         port->last_irq_msecs_diff = port->last_irq_msecs -
 530                 port->last_irq_msecs_diff;
 531
 532         saa7164_histogram_update(&port->irq_interval,
 533                 port->last_irq_msecs_diff);
 534
 535         dprintk(DBGLVL_IRQ, "%s() %Ldms elapsed\n", __func__,
 536                 port->last_irq_msecs_diff);
 537
 538         /* Tis calls the vbi irq handler */
 539         schedule_work(&port->workenc);
 540         return 0;
 541 }
 542
 543 static irqreturn_t saa7164_irq_encoder(struct saa7164_port *port)
 544 {
 545         struct saa7164_dev *dev = port->dev;
 546
 547         /* Store old time */
 548         port->last_irq_msecs_diff = port->last_irq_msecs;
 549
 550         /* Collect new stats */
 551         port->last_irq_msecs = jiffies_to_msecs(jiffies);
 552
 553         /* Calculate stats */
 554         port->last_irq_msecs_diff = port->last_irq_msecs -
 555                 port->last_irq_msecs_diff;
 556
 557         saa7164_histogram_update(&port->irq_interval,
 558                 port->last_irq_msecs_diff);
 559
 560         dprintk(DBGLVL_IRQ, "%s() %Ldms elapsed\n", __func__,
 561                 port->last_irq_msecs_diff);
 562
 563         schedule_work(&port->workenc);
 564         return 0;
 565 }
 566
 567 static irqreturn_t saa7164_irq_ts(struct saa7164_port *port)
 568 {
 569         struct saa7164_dev *dev = port->dev;
 570         struct saa7164_buffer *buf;
 571         struct list_head *c, *n;
 572         int wp, i = 0, rp;
 573
 574         /* Find the current write point from the hardware */
 575         wp = saa7164_readl(port->bufcounter);
 576
 577         BUG_ON(wp > (port->hwcfg.buffercount - 1));
 578
 579         /* Find the previous buffer to the current write point */
 580         if (wp == 0)
 581                 rp = (port->hwcfg.buffercount - 1);
 582         else
 583                 rp = wp - 1;
 584
 585         /* Lookup the WP in the buffer list */
 586         /* TODO: turn this into a worker thread */
 587         list_for_each_safe(c, n, &port->dmaqueue.list) {
 588                 buf = list_entry(c, struct saa7164_buffer, list);
 589                 BUG_ON(i > port->hwcfg.buffercount);
 590                 i++;
 591
 592                 if (buf->idx == rp) {
 593                         /* Found the buffer, deal with it */
 594                         dprintk(DBGLVL_IRQ, "%s() wp: %d processing: %d\n",
 595                                 __func__, wp, rp);
 596                         saa7164_buffer_deliver(buf);
 597                         break;
 598                 }
 599
 600         }
 601         return 0;
 602 }
 603
 604 /* Primary IRQ handler and dispatch mechanism */
 605 static irqreturn_t saa7164_irq(int irq, void *dev_id)
 606 {
 607         struct saa7164_dev *dev = dev_id;
 608         struct saa7164_port *porta, *portb, *portc, *portd, *porte, *portf;
 609
 610         u32 intid, intstat[INT_SIZE/4];
 611         int i, handled = 0, bit;
 612
 613         if (dev == NULL) {
 614                 printk(KERN_ERR "%s() No device specified\n", __func__);
 615                 handled = 0;
 616                 goto out;
 617         }
 618
 619         porta = &dev->ports[SAA7164_PORT_TS1];
 620         portb = &dev->ports[SAA7164_PORT_TS2];
 621         portc = &dev->ports[SAA7164_PORT_ENC1];
 622         portd = &dev->ports[SAA7164_PORT_ENC2];
 623         porte = &dev->ports[SAA7164_PORT_VBI1];
 624         portf = &dev->ports[SAA7164_PORT_VBI2];
 625
 626         /* Check that the hardware is accessible. If the status bytes are
 627          * 0xFF then the device is not accessible, the IRQ belongs
 628          * to another driver.
 629          * 4 x u32 interrupt registers.
 630          */
 631         for (i = 0; i < INT_SIZE/4; i++) {
 632
 633                 /* TODO: Convert into saa7164_readl() */
 634                 /* Read the 4 hardware interrupt registers */
 635                 intstat[i] = saa7164_readl(dev->int_status + (i * 4));
 636
 637                 if (intstat[i])
 638                         handled = 1;
 639         }
 640         if (handled == 0)
 641                 goto out;
 642
 643         /* For each of the HW interrupt registers */
 644         for (i = 0; i < INT_SIZE/4; i++) {
 645
 646                 if (intstat[i]) {
 647                         /* Each function of the board has it's own interruptid.
 648                          * Find the function that triggered then call
 649                          * it's handler.
 650                          */
 651                         for (bit = 0; bit < 32; bit++) {
 652
 653                                 if (((intstat[i] >> bit) & 0x00000001) == 0)
 654                                         continue;
 655
 656                                 /* Calculate the interrupt id (0x00 to 0x7f) */
 657
 658                                 intid = (i * 32) + bit;
 659                                 if (intid == dev->intfdesc.bInterruptId) {
 660                                         /* A response to an cmd/api call */
 661                                         schedule_work(&dev->workcmd);
 662                                 } else if (intid == porta->hwcfg.interruptid) {
 663
 664                                         /* Transport path 1 */
 665                                         saa7164_irq_ts(porta);
 666
 667                                 } else if (intid == portb->hwcfg.interruptid) {
 668
 669                                         /* Transport path 2 */
 670                                         saa7164_irq_ts(portb);
 671
 672                                 } else if (intid == portc->hwcfg.interruptid) {
 673
 674                                         /* Encoder path 1 */
 675                                         saa7164_irq_encoder(portc);
 676
 677                                 } else if (intid == portd->hwcfg.interruptid) {
 678
 679                                         /* Encoder path 2 */
 680                                         saa7164_irq_encoder(portd);
 681
 682                                 } else if (intid == porte->hwcfg.interruptid) {
 683
 684                                         /* VBI path 1 */
 685                                         saa7164_irq_vbi(porte);
 686
 687                                 } else if (intid == portf->hwcfg.interruptid) {
 688
 689                                         /* VBI path 2 */
 690                                         saa7164_irq_vbi(portf);
 691
 692                                 } else {
 693                                         /* Find the function */
 694                                         dprintk(DBGLVL_IRQ,
 695                                                 "%s() unhandled interrupt reg 0x%x bit 0x%x intid = 0x%x\n",
 696                                                 __func__, i, bit, intid);
 697                                 }
 698                         }
 699
 700                         /* Ack it */
 701                         saa7164_writel(dev->int_ack + (i * 4), intstat[i]);
 702
 703                 }
 704         }
 705 out:
 706         return IRQ_RETVAL(handled);
 707 }
 708
 709 void saa7164_getfirmwarestatus(struct saa7164_dev *dev)
 710 {
 711         struct saa7164_fw_status *s = &dev->fw_status;
 712
 713         dev->fw_status.status = saa7164_readl(SAA_DEVICE_SYSINIT_STATUS);
 714         dev->fw_status.mode = saa7164_readl(SAA_DEVICE_SYSINIT_MODE);
 715         dev->fw_status.spec = saa7164_readl(SAA_DEVICE_SYSINIT_SPEC);
 716         dev->fw_status.inst = saa7164_readl(SAA_DEVICE_SYSINIT_INST);
 717         dev->fw_status.cpuload = saa7164_readl(SAA_DEVICE_SYSINIT_CPULOAD);
 718         dev->fw_status.remainheap =
 719                 saa7164_readl(SAA_DEVICE_SYSINIT_REMAINHEAP);
 720
 721         dprintk(1, "Firmware status:\n");
 722         dprintk(1, " .status     = 0x%08x\n", s->status);
 723         dprintk(1, " .mode       = 0x%08x\n", s->mode);
 724         dprintk(1, " .spec       = 0x%08x\n", s->spec);
 725         dprintk(1, " .inst       = 0x%08x\n", s->inst);
 726         dprintk(1, " .cpuload    = 0x%08x\n", s->cpuload);
 727         dprintk(1, " .remainheap = 0x%08x\n", s->remainheap);
 728 }
 729
 730 u32 saa7164_getcurrentfirmwareversion(struct saa7164_dev *dev)
 731 {
 732         u32 reg;
 733
 734         reg = saa7164_readl(SAA_DEVICE_VERSION);
 735         dprintk(1, "Device running firmware version %d.%d.%d.%d (0x%x)\n",
 736                 (reg & 0x0000fc00) >> 10,
 737                 (reg & 0x000003e0) >> 5,
 738                 (reg & 0x0000001f),
 739                 (reg & 0xffff0000) >> 16,
 740                 reg);
 741
 742         return reg;
 743 }
 744
 745 /* TODO: Debugging func, remove */
 746 void saa7164_dumpregs(struct saa7164_dev *dev, u32 addr)
 747 {
 748         int i;
 749
 750         dprintk(1, "--------------------> 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f\n");
 751
 752         for (i = 0; i < 0x100; i += 16)
 753                 dprintk(1, "region0[0x%08x] = %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
 754                         i,
 755                         (u8)saa7164_readb(addr + i + 0),
 756                         (u8)saa7164_readb(addr + i + 1),
 757                         (u8)saa7164_readb(addr + i + 2),
 758                         (u8)saa7164_readb(addr + i + 3),
 759                         (u8)saa7164_readb(addr + i + 4),
 760                         (u8)saa7164_readb(addr + i + 5),
 761                         (u8)saa7164_readb(addr + i + 6),
 762                         (u8)saa7164_readb(addr + i + 7),
 763                         (u8)saa7164_readb(addr + i + 8),
 764                         (u8)saa7164_readb(addr + i + 9),
 765                         (u8)saa7164_readb(addr + i + 10),
 766                         (u8)saa7164_readb(addr + i + 11),
 767                         (u8)saa7164_readb(addr + i + 12),
 768                         (u8)saa7164_readb(addr + i + 13),
 769                         (u8)saa7164_readb(addr + i + 14),
 770                         (u8)saa7164_readb(addr + i + 15)
 771                         );
 772 }
 773
 774 static void saa7164_dump_hwdesc(struct saa7164_dev *dev)
 775 {
 776         dprintk(1, "@0x%p hwdesc sizeof(struct tmComResHWDescr) = %d bytes\n",
 777                 &dev->hwdesc, (u32)sizeof(struct tmComResHWDescr));
 778
 779         dprintk(1, " .bLength = 0x%x\n", dev->hwdesc.bLength);
 780         dprintk(1, " .bDescriptorType = 0x%x\n", dev->hwdesc.bDescriptorType);
 781         dprintk(1, " .bDescriptorSubtype = 0x%x\n",
 782                 dev->hwdesc.bDescriptorSubtype);
 783
 784         dprintk(1, " .bcdSpecVersion = 0x%x\n", dev->hwdesc.bcdSpecVersion);
 785         dprintk(1, " .dwClockFrequency = 0x%x\n", dev->hwdesc.dwClockFrequency);
 786         dprintk(1, " .dwClockUpdateRes = 0x%x\n", dev->hwdesc.dwClockUpdateRes);
 787         dprintk(1, " .bCapabilities = 0x%x\n", dev->hwdesc.bCapabilities);
 788         dprintk(1, " .dwDeviceRegistersLocation = 0x%x\n",
 789                 dev->hwdesc.dwDeviceRegistersLocation);
 790
 791         dprintk(1, " .dwHostMemoryRegion = 0x%x\n",
 792                 dev->hwdesc.dwHostMemoryRegion);
 793
 794         dprintk(1, " .dwHostMemoryRegionSize = 0x%x\n",
 795                 dev->hwdesc.dwHostMemoryRegionSize);
 796
 797         dprintk(1, " .dwHostHibernatMemRegion = 0x%x\n",
 798                 dev->hwdesc.dwHostHibernatMemRegion);
 799
 800         dprintk(1, " .dwHostHibernatMemRegionSize = 0x%x\n",
 801                 dev->hwdesc.dwHostHibernatMemRegionSize);
 802 }
 803
 804 static void saa7164_dump_intfdesc(struct saa7164_dev *dev)
 805 {
 806         dprintk(1, "@0x%p intfdesc sizeof(struct tmComResInterfaceDescr) = %d bytes\n",
 807                 &dev->intfdesc, (u32)sizeof(struct tmComResInterfaceDescr));
 808
 809         dprintk(1, " .bLength = 0x%x\n", dev->intfdesc.bLength);
 810         dprintk(1, " .bDescriptorType = 0x%x\n", dev->intfdesc.bDescriptorType);
 811         dprintk(1, " .bDescriptorSubtype = 0x%x\n",
 812                 dev->intfdesc.bDescriptorSubtype);
 813
 814         dprintk(1, " .bFlags = 0x%x\n", dev->intfdesc.bFlags);
 815         dprintk(1, " .bInterfaceType = 0x%x\n", dev->intfdesc.bInterfaceType);
 816         dprintk(1, " .bInterfaceId = 0x%x\n", dev->intfdesc.bInterfaceId);
 817         dprintk(1, " .bBaseInterface = 0x%x\n", dev->intfdesc.bBaseInterface);
 818         dprintk(1, " .bInterruptId = 0x%x\n", dev->intfdesc.bInterruptId);
 819         dprintk(1, " .bDebugInterruptId = 0x%x\n",
 820                 dev->intfdesc.bDebugInterruptId);
 821
 822         dprintk(1, " .BARLocation = 0x%x\n", dev->intfdesc.BARLocation);
 823 }
 824
 825 static void saa7164_dump_busdesc(struct saa7164_dev *dev)
 826 {
 827         dprintk(1, "@0x%p busdesc sizeof(struct tmComResBusDescr) = %d bytes\n",
 828                 &dev->busdesc, (u32)sizeof(struct tmComResBusDescr));
 829
 830         dprintk(1, " .CommandRing   = 0x%016Lx\n", dev->busdesc.CommandRing);
 831         dprintk(1, " .ResponseRing  = 0x%016Lx\n", dev->busdesc.ResponseRing);
 832         dprintk(1, " .CommandWrite  = 0x%x\n", dev->busdesc.CommandWrite);
 833         dprintk(1, " .CommandRead   = 0x%x\n", dev->busdesc.CommandRead);
 834         dprintk(1, " .ResponseWrite = 0x%x\n", dev->busdesc.ResponseWrite);
 835         dprintk(1, " .ResponseRead  = 0x%x\n", dev->busdesc.ResponseRead);
 836 }
 837
 838 /* Much of the hardware configuration and PCI registers are configured
 839  * dynamically depending on firmware. We have to cache some initial
 840  * structures then use these to locate other important structures
 841  * from PCI space.
 842  */
 843 static void saa7164_get_descriptors(struct saa7164_dev *dev)
 844 {
 845         memcpy_fromio(&dev->hwdesc, dev->bmmio, sizeof(struct tmComResHWDescr));
 846         memcpy_fromio(&dev->intfdesc, dev->bmmio + sizeof(struct tmComResHWDescr),
 847                 sizeof(struct tmComResInterfaceDescr));
 848         memcpy_fromio(&dev->busdesc, dev->bmmio + dev->intfdesc.BARLocation,
 849                 sizeof(struct tmComResBusDescr));
 850
 851         if (dev->hwdesc.bLength != sizeof(struct tmComResHWDescr)) {
 852                 printk(KERN_ERR "Structure struct tmComResHWDescr is mangled\n");
 853                 printk(KERN_ERR "Need %x got %d\n", dev->hwdesc.bLength,
 854                         (u32)sizeof(struct tmComResHWDescr));
 855         } else
 856                 saa7164_dump_hwdesc(dev);
 857
 858         if (dev->intfdesc.bLength != sizeof(struct tmComResInterfaceDescr)) {
 859                 printk(KERN_ERR "struct struct tmComResInterfaceDescr is mangled\n");
 860                 printk(KERN_ERR "Need %x got %d\n", dev->intfdesc.bLength,
 861                         (u32)sizeof(struct tmComResInterfaceDescr));
 862         } else
 863                 saa7164_dump_intfdesc(dev);
 864
 865         saa7164_dump_busdesc(dev);
 866 }
 867
 868 static int saa7164_pci_quirks(struct saa7164_dev *dev)
 869 {
 870         return 0;
 871 }
 872
 873 static int get_resources(struct saa7164_dev *dev)
 874 {
 875         if (request_mem_region(pci_resource_start(dev->pci, 0),
 876                 pci_resource_len(dev->pci, 0), dev->name)) {
 877
 878                 if (request_mem_region(pci_resource_start(dev->pci, 2),
 879                         pci_resource_len(dev->pci, 2), dev->name))
 880                         return 0;
 881         }
 882
 883         printk(KERN_ERR "%s: can't get MMIO memory @ 0x%llx or 0x%llx\n",
 884                 dev->name,
 885                 (u64)pci_resource_start(dev->pci, 0),
 886                 (u64)pci_resource_start(dev->pci, 2));
 887
 888         return -EBUSY;
 889 }
 890
 891 static int saa7164_port_init(struct saa7164_dev *dev, int portnr)
 892 {
 893         struct saa7164_port *port = NULL;
 894
 895         BUG_ON((portnr < 0) || (portnr >= SAA7164_MAX_PORTS));
 896
 897         port = &dev->ports[portnr];
 898
 899         port->dev = dev;
 900         port->nr = portnr;
 901
 902         if ((portnr == SAA7164_PORT_TS1) || (portnr == SAA7164_PORT_TS2))
 903                 port->type = SAA7164_MPEG_DVB;
 904         else
 905         if ((portnr == SAA7164_PORT_ENC1) || (portnr == SAA7164_PORT_ENC2)) {
 906                 port->type = SAA7164_MPEG_ENCODER;
 907
 908                 /* We need a deferred interrupt handler for cmd handling */
 909                 INIT_WORK(&port->workenc, saa7164_work_enchandler);
 910         } else if ((portnr == SAA7164_PORT_VBI1) || (portnr == SAA7164_PORT_VBI2)) {
 911                 port->type = SAA7164_MPEG_VBI;
 912
 913                 /* We need a deferred interrupt handler for cmd handling */
 914                 INIT_WORK(&port->workenc, saa7164_work_vbihandler);
 915         } else
 916                 BUG();
 917
 918         /* Init all the critical resources */
 919         mutex_init(&port->dvb.lock);
 920         INIT_LIST_HEAD(&port->dmaqueue.list);
 921         mutex_init(&port->dmaqueue_lock);
 922
 923         INIT_LIST_HEAD(&port->list_buf_used.list);
 924         INIT_LIST_HEAD(&port->list_buf_free.list);
 925         init_waitqueue_head(&port->wait_read);
 926
 927
 928         saa7164_histogram_reset(&port->irq_interval, "irq intervals");
 929         saa7164_histogram_reset(&port->svc_interval, "deferred intervals");
 930         saa7164_histogram_reset(&port->irq_svc_interval,
 931                 "irq to deferred intervals");
 932         saa7164_histogram_reset(&port->read_interval,
 933                 "encoder/vbi read() intervals");
 934         saa7164_histogram_reset(&port->poll_interval,
 935                 "encoder/vbi poll() intervals");
 936
 937         return 0;
 938 }
 939
 940 static int saa7164_dev_setup(struct saa7164_dev *dev)
 941 {
 942         int i;
 943
 944         mutex_init(&dev->lock);
 945         atomic_inc(&dev->refcount);
 946         dev->nr = saa7164_devcount++;
 947
 948         snprintf(dev->name, sizeof(dev->name), "saa7164[%d]", dev->nr);
 949
 950         mutex_lock(&devlist);
 951         list_add_tail(&dev->devlist, &saa7164_devlist);
 952         mutex_unlock(&devlist);
 953
 954         /* board config */
 955         dev->board = UNSET;
 956         if (card[dev->nr] < saa7164_bcount)
 957                 dev->board = card[dev->nr];
 958
 959         for (i = 0; UNSET == dev->board  &&  i < saa7164_idcount; i++)
 960                 if (dev->pci->subsystem_vendor == saa7164_subids[i].subvendor &&
 961                         dev->pci->subsystem_device ==
 962                                 saa7164_subids[i].subdevice)
 963                                 dev->board = saa7164_subids[i].card;
 964
 965         if (UNSET == dev->board) {
 966                 dev->board = SAA7164_BOARD_UNKNOWN;
 967                 saa7164_card_list(dev);
 968         }
 969
 970         dev->pci_bus  = dev->pci->bus->number;
 971         dev->pci_slot = PCI_SLOT(dev->pci->devfn);
 972
 973         /* I2C Defaults / setup */
 974         dev->i2c_bus[0].dev = dev;
 975         dev->i2c_bus[0].nr = 0;
 976         dev->i2c_bus[1].dev = dev;
 977         dev->i2c_bus[1].nr = 1;
 978         dev->i2c_bus[2].dev = dev;
 979         dev->i2c_bus[2].nr = 2;
 980
 981         /* Transport + Encoder ports 1, 2, 3, 4 - Defaults / setup */
 982         saa7164_port_init(dev, SAA7164_PORT_TS1);
 983         saa7164_port_init(dev, SAA7164_PORT_TS2);
 984         saa7164_port_init(dev, SAA7164_PORT_ENC1);
 985         saa7164_port_init(dev, SAA7164_PORT_ENC2);
 986         saa7164_port_init(dev, SAA7164_PORT_VBI1);
 987         saa7164_port_init(dev, SAA7164_PORT_VBI2);
 988
 989         if (get_resources(dev) < 0) {
 990                 printk(KERN_ERR "CORE %s No more PCIe resources for subsystem: %04x:%04x\n",
 991                        dev->name, dev->pci->subsystem_vendor,
 992                        dev->pci->subsystem_device);
 993
 994                 saa7164_devcount--;
 995                 return -ENODEV;
 996         }
 997
 998         /* PCI/e allocations */
 999         dev->lmmio = ioremap(pci_resource_start(dev->pci, 0),
1000                              pci_resource_len(dev->pci, 0));
1001
1002         dev->lmmio2 = ioremap(pci_resource_start(dev->pci, 2),
1003                              pci_resource_len(dev->pci, 2));
1004
1005         dev->bmmio = (u8 __iomem *)dev->lmmio;
1006         dev->bmmio2 = (u8 __iomem *)dev->lmmio2;
1007
1008         /* Interrupt and ack register locations offset of bmmio */
1009         dev->int_status = 0x183000 + 0xf80;
1010         dev->int_ack = 0x183000 + 0xf90;
1011
1012         printk(KERN_INFO
1013                 "CORE %s: subsystem: %04x:%04x, board: %s [card=%d,%s]\n",
1014                dev->name, dev->pci->subsystem_vendor,
1015                dev->pci->subsystem_device, saa7164_boards[dev->board].name,
1016                dev->board, card[dev->nr] == dev->board ?
1017                "insmod option" : "autodetected");
1018
1019         saa7164_pci_quirks(dev);
1020
1021         return 0;
1022 }
1023
1024 static void saa7164_dev_unregister(struct saa7164_dev *dev)
1025 {
1026         dprintk(1, "%s()\n", __func__);
1027
1028         release_mem_region(pci_resource_start(dev->pci, 0),
1029                 pci_resource_len(dev->pci, 0));
1030
1031         release_mem_region(pci_resource_start(dev->pci, 2),
1032                 pci_resource_len(dev->pci, 2));
1033
1034         if (!atomic_dec_and_test(&dev->refcount))
1035                 return;
1036
1037         iounmap(dev->lmmio);
1038         iounmap(dev->lmmio2);
1039
1040         return;
1041 }
1042
1043 #ifdef CONFIG_DEBUG_FS
1044 static void *saa7164_seq_start(struct seq_file *s, loff_t *pos)
1045 {
1046         struct saa7164_dev *dev;
1047         loff_t index = *pos;
1048
1049         mutex_lock(&devlist);
1050         list_for_each_entry(dev, &saa7164_devlist, devlist) {
1051                 if (index-- == 0) {
1052                         mutex_unlock(&devlist);
1053                         return dev;
1054                 }
1055         }
1056         mutex_unlock(&devlist);
1057
1058         return NULL;
1059 }
1060
1061 static void *saa7164_seq_next(struct seq_file *s, void *v, loff_t *pos)
1062 {
1063         struct saa7164_dev *dev = v;
1064         void *ret;
1065
1066         mutex_lock(&devlist);
1067         if (list_is_last(&dev->devlist, &saa7164_devlist))
1068                 ret = NULL;
1069         else
1070                 ret = list_next_entry(dev, devlist);
1071         mutex_unlock(&devlist);
1072
1073         ++*pos;
1074
1075         return ret;
1076 }
1077
1078 static void saa7164_seq_stop(struct seq_file *s, void *v)
1079 {
1080 }
1081
1082 static int saa7164_seq_show(struct seq_file *m, void *v)
1083 {
1084         struct saa7164_dev *dev = v;
1085         struct tmComResBusInfo *b;
1086         int i, c;
1087
1088         seq_printf(m, "%s = %p\n", dev->name, dev);
1089
1090         /* Lock the bus from any other access */
1091         b = &dev->bus;
1092         mutex_lock(&b->lock);
1093
1094         seq_printf(m, " .m_pdwSetWritePos = 0x%x (0x%08x)\n",
1095                    b->m_dwSetReadPos, saa7164_readl(b->m_dwSetReadPos));
1096
1097         seq_printf(m, " .m_pdwSetReadPos  = 0x%x (0x%08x)\n",
1098                    b->m_dwSetWritePos, saa7164_readl(b->m_dwSetWritePos));
1099
1100         seq_printf(m, " .m_pdwGetWritePos = 0x%x (0x%08x)\n",
1101                    b->m_dwGetReadPos, saa7164_readl(b->m_dwGetReadPos));
1102
1103         seq_printf(m, " .m_pdwGetReadPos  = 0x%x (0x%08x)\n",
1104                    b->m_dwGetWritePos, saa7164_readl(b->m_dwGetWritePos));
1105         c = 0;
1106         seq_puts(m, "\n  Set Ring:\n");
1107         seq_puts(m, "\n addr  00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f\n");
1108         for (i = 0; i < b->m_dwSizeSetRing; i++) {
1109                 if (c == 0)
1110                         seq_printf(m, " %04x:", i);
1111
1112                 seq_printf(m, " %02x", readb(b->m_pdwSetRing + i));
1113
1114                 if (++c == 16) {
1115                         seq_puts(m, "\n");
1116                         c = 0;
1117                 }
1118         }
1119
1120         c = 0;
1121         seq_puts(m, "\n  Get Ring:\n");
1122         seq_puts(m, "\n addr  00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f\n");
1123         for (i = 0; i < b->m_dwSizeGetRing; i++) {
1124                 if (c == 0)
1125                         seq_printf(m, " %04x:", i);
1126
1127                 seq_printf(m, " %02x", readb(b->m_pdwGetRing + i));
1128
1129                 if (++c == 16) {
1130                         seq_puts(m, "\n");
1131                         c = 0;
1132                 }
1133         }
1134
1135         mutex_unlock(&b->lock);
1136
1137         return 0;
1138 }
1139
1140 static const struct seq_operations saa7164_sops = {
1141         .start = saa7164_seq_start,
1142         .next = saa7164_seq_next,
1143         .stop = saa7164_seq_stop,
1144         .show = saa7164_seq_show,
1145 };
1146
1147 DEFINE_SEQ_ATTRIBUTE(saa7164);
1148
1149 static struct dentry *saa7614_dentry;
1150
1151 static void __init saa7164_debugfs_create(void)
1152 {
1153         saa7614_dentry = debugfs_create_file("saa7164", 0444, NULL, NULL,
1154                                              &saa7164_fops);
1155 }
1156
1157 static void __exit saa7164_debugfs_remove(void)
1158 {
1159         debugfs_remove(saa7614_dentry);
1160 }
1161 #else
1162 static void saa7164_debugfs_create(void) { }
1163 static void saa7164_debugfs_remove(void) { }
1164 #endif
1165
1166 static int saa7164_thread_function(void *data)
1167 {
1168         struct saa7164_dev *dev = data;
1169         struct tmFwInfoStruct fwinfo;
1170         u64 last_poll_time = 0;
1171
1172         dprintk(DBGLVL_THR, "thread started\n");
1173
1174         set_freezable();
1175
1176         while (1) {
1177                 msleep_interruptible(100);
1178                 if (kthread_should_stop())
1179                         break;
1180                 try_to_freeze();
1181
1182                 dprintk(DBGLVL_THR, "thread running\n");
1183
1184                 /* Dump the firmware debug message to console */
1185                 /* Polling this costs us 1-2% of the arm CPU */
1186                 /* convert this into a respnde to interrupt 0x7a */
1187                 saa7164_api_collect_debug(dev);
1188
1189                 /* Monitor CPU load every 1 second */
1190                 if ((last_poll_time + 1000 /* ms */) < jiffies_to_msecs(jiffies)) {
1191                         saa7164_api_get_load_info(dev, &fwinfo);
1192                         last_poll_time = jiffies_to_msecs(jiffies);
1193                 }
1194
1195         }
1196
1197         dprintk(DBGLVL_THR, "thread exiting\n");
1198         return 0;
1199 }
1200
1201 static bool saa7164_enable_msi(struct pci_dev *pci_dev, struct saa7164_dev *dev)
1202 {
1203         int err;
1204
1205         if (!enable_msi) {
1206                 printk(KERN_WARNING "%s() MSI disabled by module parameter 'enable_msi'"
1207                        , __func__);
1208                 return false;
1209         }
1210
1211         err = pci_enable_msi(pci_dev);
1212
1213         if (err) {
1214                 printk(KERN_ERR "%s() Failed to enable MSI interrupt. Falling back to a shared IRQ\n",
1215                        __func__);
1216                 return false;
1217         }
1218
1219         /* no error - so request an msi interrupt */
1220         err = request_irq(pci_dev->irq, saa7164_irq, 0,
1221                                                 dev->name, dev);
1222
1223         if (err) {
1224                 /* fall back to legacy interrupt */
1225                 printk(KERN_ERR "%s() Failed to get an MSI interrupt. Falling back to a shared IRQ\n",
1226                        __func__);
1227                 pci_disable_msi(pci_dev);
1228                 return false;
1229         }
1230
1231         return true;
1232 }
1233
1234 static int saa7164_initdev(struct pci_dev *pci_dev,
1235                            const struct pci_device_id *pci_id)
1236 {
1237         struct saa7164_dev *dev;
1238         int err, i;
1239         u32 version;
1240
1241         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1242         if (NULL == dev)
1243                 return -ENOMEM;
1244
1245         err = v4l2_device_register(&pci_dev->dev, &dev->v4l2_dev);
1246         if (err < 0) {
1247                 dev_err(&pci_dev->dev, "v4l2_device_register failed\n");
1248                 goto fail_free;
1249         }
1250
1251         /* pci init */
1252         dev->pci = pci_dev;
1253         if (pci_enable_device(pci_dev)) {
1254                 err = -EIO;
1255                 goto fail_free;
1256         }
1257
1258         if (saa7164_dev_setup(dev) < 0) {
1259                 err = -EINVAL;
1260                 goto fail_dev;
1261         }
1262
1263         /* print pci info */
1264         dev->pci_rev = pci_dev->revision;
1265         pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER,  &dev->pci_lat);
1266         printk(KERN_INFO "%s/0: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
1267                dev->name,
1268                pci_name(pci_dev), dev->pci_rev, pci_dev->irq,
1269                dev->pci_lat,
1270                 (unsigned long long)pci_resource_start(pci_dev, 0));
1271
1272         pci_set_master(pci_dev);
1273         /* TODO */
1274         err = dma_set_mask(&pci_dev->dev, 0xffffffff);
1275         if (err) {
1276                 printk("%s/0: Oops: no 32bit PCI DMA ???\n", dev->name);
1277                 goto fail_irq;
1278         }
1279
1280         /* irq bit */
1281         if (saa7164_enable_msi(pci_dev, dev)) {
1282                 dev->msi = true;
1283         } else {
1284                 /* if we have an error (i.e. we don't have an interrupt)
1285                          or msi is not enabled - fallback to shared interrupt */
1286
1287                 err = request_irq(pci_dev->irq, saa7164_irq,
1288                                 IRQF_SHARED, dev->name, dev);
1289
1290                 if (err < 0) {
1291                         printk(KERN_ERR "%s: can't get IRQ %d\n", dev->name,
1292                                pci_dev->irq);
1293                         err = -EIO;
1294                         goto fail_irq;
1295                 }
1296         }
1297
1298         pci_set_drvdata(pci_dev, dev);
1299
1300         /* Init the internal command list */
1301         for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) {
1302                 dev->cmds[i].seqno = i;
1303                 dev->cmds[i].inuse = 0;
1304                 mutex_init(&dev->cmds[i].lock);
1305                 init_waitqueue_head(&dev->cmds[i].wait);
1306         }
1307
1308         /* We need a deferred interrupt handler for cmd handling */
1309         INIT_WORK(&dev->workcmd, saa7164_work_cmdhandler);
1310
1311         /* Only load the firmware if we know the board */
1312         if (dev->board != SAA7164_BOARD_UNKNOWN) {
1313
1314                 err = saa7164_downloadfirmware(dev);
1315                 if (err < 0) {
1316                         printk(KERN_ERR
1317                                 "Failed to boot firmware, no features registered\n");
1318                         goto fail_fw;
1319                 }
1320
1321                 saa7164_get_descriptors(dev);
1322                 saa7164_dumpregs(dev, 0);
1323                 saa7164_getcurrentfirmwareversion(dev);
1324                 saa7164_getfirmwarestatus(dev);
1325                 err = saa7164_bus_setup(dev);
1326                 if (err < 0)
1327                         printk(KERN_ERR
1328                                 "Failed to setup the bus, will continue\n");
1329                 saa7164_bus_dump(dev);
1330
1331                 /* Ping the running firmware via the command bus and get the
1332                  * firmware version, this checks the bus is running OK.
1333                  */
1334                 version = 0;
1335                 if (saa7164_api_get_fw_version(dev, &version) == SAA_OK)
1336                         dprintk(1, "Bus is operating correctly using version %d.%d.%d.%d (0x%x)\n",
1337                                 (version & 0x0000fc00) >> 10,
1338                                 (version & 0x000003e0) >> 5,
1339                                 (version & 0x0000001f),
1340                                 (version & 0xffff0000) >> 16,
1341                                 version);
1342                 else
1343                         printk(KERN_ERR
1344                                 "Failed to communicate with the firmware\n");
1345
1346                 /* Bring up the I2C buses */
1347                 saa7164_i2c_register(&dev->i2c_bus[0]);
1348                 saa7164_i2c_register(&dev->i2c_bus[1]);
1349                 saa7164_i2c_register(&dev->i2c_bus[2]);
1350                 saa7164_gpio_setup(dev);
1351                 saa7164_card_setup(dev);
1352
1353                 /* Parse the dynamic device configuration, find various
1354                  * media endpoints (MPEG, WMV, PS, TS) and cache their
1355                  * configuration details into the driver, so we can
1356                  * reference them later during simething_register() func,
1357                  * interrupt handlers, deferred work handlers etc.
1358                  */
1359                 saa7164_api_enum_subdevs(dev);
1360
1361                 /* Begin to create the video sub-systems and register funcs */
1362                 if (saa7164_boards[dev->board].porta == SAA7164_MPEG_DVB) {
1363                         if (saa7164_dvb_register(&dev->ports[SAA7164_PORT_TS1]) < 0) {
1364                                 printk(KERN_ERR "%s() Failed to register dvb adapters on porta\n",
1365                                         __func__);
1366                         }
1367                 }
1368
1369                 if (saa7164_boards[dev->board].portb == SAA7164_MPEG_DVB) {
1370                         if (saa7164_dvb_register(&dev->ports[SAA7164_PORT_TS2]) < 0) {
1371                                 printk(KERN_ERR"%s() Failed to register dvb adapters on portb\n",
1372                                         __func__);
1373                         }
1374                 }
1375
1376                 if (saa7164_boards[dev->board].portc == SAA7164_MPEG_ENCODER) {
1377                         if (saa7164_encoder_register(&dev->ports[SAA7164_PORT_ENC1]) < 0) {
1378                                 printk(KERN_ERR"%s() Failed to register mpeg encoder\n",
1379                                        __func__);
1380                         }
1381                 }
1382
1383                 if (saa7164_boards[dev->board].portd == SAA7164_MPEG_ENCODER) {
1384                         if (saa7164_encoder_register(&dev->ports[SAA7164_PORT_ENC2]) < 0) {
1385                                 printk(KERN_ERR"%s() Failed to register mpeg encoder\n",
1386                                        __func__);
1387                         }
1388                 }
1389
1390                 if (saa7164_boards[dev->board].porte == SAA7164_MPEG_VBI) {
1391                         if (saa7164_vbi_register(&dev->ports[SAA7164_PORT_VBI1]) < 0) {
1392                                 printk(KERN_ERR"%s() Failed to register vbi device\n",
1393                                        __func__);
1394                         }
1395                 }
1396
1397                 if (saa7164_boards[dev->board].portf == SAA7164_MPEG_VBI) {
1398                         if (saa7164_vbi_register(&dev->ports[SAA7164_PORT_VBI2]) < 0) {
1399                                 printk(KERN_ERR"%s() Failed to register vbi device\n",
1400                                        __func__);
1401                         }
1402                 }
1403                 saa7164_api_set_debug(dev, fw_debug);
1404
1405                 if (fw_debug) {
1406                         dev->kthread = kthread_run(saa7164_thread_function, dev,
1407                                 "saa7164 debug");
1408                         if (IS_ERR(dev->kthread)) {
1409                                 dev->kthread = NULL;
1410                                 printk(KERN_ERR "%s() Failed to create debug kernel thread\n",
1411                                        __func__);
1412                         }
1413                 }
1414
1415         } /* != BOARD_UNKNOWN */
1416         else
1417                 printk(KERN_ERR "%s() Unsupported board detected, registering without firmware\n",
1418                        __func__);
1419
1420         dprintk(1, "%s() parameter debug = %d\n", __func__, saa_debug);
1421         dprintk(1, "%s() parameter waitsecs = %d\n", __func__, waitsecs);
1422
1423 fail_fw:
1424         return 0;
1425
1426 fail_irq:
1427         saa7164_dev_unregister(dev);
1428 fail_dev:
1429         pci_disable_device(pci_dev);
1430 fail_free:
1431         v4l2_device_unregister(&dev->v4l2_dev);
1432         kfree(dev);
1433         return err;
1434 }
1435
1436 static void saa7164_shutdown(struct saa7164_dev *dev)
1437 {
1438         dprintk(1, "%s()\n", __func__);
1439 }
1440
1441 static void saa7164_finidev(struct pci_dev *pci_dev)
1442 {
1443         struct saa7164_dev *dev = pci_get_drvdata(pci_dev);
1444
1445         if (dev->board != SAA7164_BOARD_UNKNOWN) {
1446                 if (fw_debug && dev->kthread) {
1447                         kthread_stop(dev->kthread);
1448                         dev->kthread = NULL;
1449                 }
1450                 if (dev->firmwareloaded)
1451                         saa7164_api_set_debug(dev, 0x00);
1452         }
1453
1454         saa7164_histogram_print(&dev->ports[SAA7164_PORT_ENC1],
1455                 &dev->ports[SAA7164_PORT_ENC1].irq_interval);
1456         saa7164_histogram_print(&dev->ports[SAA7164_PORT_ENC1],
1457                 &dev->ports[SAA7164_PORT_ENC1].svc_interval);
1458         saa7164_histogram_print(&dev->ports[SAA7164_PORT_ENC1],
1459                 &dev->ports[SAA7164_PORT_ENC1].irq_svc_interval);
1460         saa7164_histogram_print(&dev->ports[SAA7164_PORT_ENC1],
1461                 &dev->ports[SAA7164_PORT_ENC1].read_interval);
1462         saa7164_histogram_print(&dev->ports[SAA7164_PORT_ENC1],
1463                 &dev->ports[SAA7164_PORT_ENC1].poll_interval);
1464         saa7164_histogram_print(&dev->ports[SAA7164_PORT_VBI1],
1465                 &dev->ports[SAA7164_PORT_VBI1].read_interval);
1466         saa7164_histogram_print(&dev->ports[SAA7164_PORT_VBI2],
1467                 &dev->ports[SAA7164_PORT_VBI2].poll_interval);
1468
1469         saa7164_shutdown(dev);
1470
1471         if (saa7164_boards[dev->board].porta == SAA7164_MPEG_DVB)
1472                 saa7164_dvb_unregister(&dev->ports[SAA7164_PORT_TS1]);
1473
1474         if (saa7164_boards[dev->board].portb == SAA7164_MPEG_DVB)
1475                 saa7164_dvb_unregister(&dev->ports[SAA7164_PORT_TS2]);
1476
1477         if (saa7164_boards[dev->board].portc == SAA7164_MPEG_ENCODER)
1478                 saa7164_encoder_unregister(&dev->ports[SAA7164_PORT_ENC1]);
1479
1480         if (saa7164_boards[dev->board].portd == SAA7164_MPEG_ENCODER)
1481                 saa7164_encoder_unregister(&dev->ports[SAA7164_PORT_ENC2]);
1482
1483         if (saa7164_boards[dev->board].porte == SAA7164_MPEG_VBI)
1484                 saa7164_vbi_unregister(&dev->ports[SAA7164_PORT_VBI1]);
1485
1486         if (saa7164_boards[dev->board].portf == SAA7164_MPEG_VBI)
1487                 saa7164_vbi_unregister(&dev->ports[SAA7164_PORT_VBI2]);
1488
1489         saa7164_i2c_unregister(&dev->i2c_bus[0]);
1490         saa7164_i2c_unregister(&dev->i2c_bus[1]);
1491         saa7164_i2c_unregister(&dev->i2c_bus[2]);
1492
1493         /* unregister stuff */
1494         free_irq(pci_dev->irq, dev);
1495
1496         if (dev->msi) {
1497                 pci_disable_msi(pci_dev);
1498                 dev->msi = false;
1499         }
1500
1501         pci_disable_device(pci_dev);
1502
1503         mutex_lock(&devlist);
1504         list_del(&dev->devlist);
1505         mutex_unlock(&devlist);
1506
1507         saa7164_dev_unregister(dev);
1508         v4l2_device_unregister(&dev->v4l2_dev);
1509         kfree(dev);
1510 }
1511
1512 static const struct pci_device_id saa7164_pci_tbl[] = {
1513         {
1514                 /* SAA7164 */
1515                 .vendor       = 0x1131,
1516                 .device       = 0x7164,
1517                 .subvendor    = PCI_ANY_ID,
1518                 .subdevice    = PCI_ANY_ID,
1519         }, {
1520                 /* --- end of list --- */
1521         }
1522 };
1523 MODULE_DEVICE_TABLE(pci, saa7164_pci_tbl);
1524
1525 static struct pci_driver saa7164_pci_driver = {
1526         .name     = "saa7164",
1527         .id_table = saa7164_pci_tbl,
1528         .probe    = saa7164_initdev,
1529         .remove   = saa7164_finidev,
1530 };
1531
1532 static int __init saa7164_init(void)
1533 {
1534         int ret = pci_register_driver(&saa7164_pci_driver);
1535
1536         if (ret)
1537                 return ret;
1538
1539         saa7164_debugfs_create();
1540
1541         pr_info("saa7164 driver loaded\n");
1542
1543         return 0;
1544 }
1545
1546 static void __exit saa7164_fini(void)
1547 {
1548         saa7164_debugfs_remove();
1549         pci_unregister_driver(&saa7164_pci_driver);
1550 }
1551
1552 module_init(saa7164_init);
1553 module_exit(saa7164_fini);