drivers/media/video/cx88/cx88-mpeg.c

   1 /*
   2  *
   3  *  Support for the mpeg transport stream transfers
   4  *  PCI function #2 of the cx2388x.
   5  *
   6  *    (c) 2004 Jelle Foks <jelle@foks.8m.com>
   7  *    (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
   8  *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/init.h>
  28 #include <linux/device.h>
  29 #include <linux/interrupt.h>
  30 #include <asm/delay.h>
  31
  32 #include "cx88.h"
  33
  34 /* ------------------------------------------------------------------ */
  35
  36 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
  37 MODULE_AUTHOR("Jelle Foks <jelle@foks.8m.com>");
  38 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
  39 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  40 MODULE_LICENSE("GPL");
  41
  42 static unsigned int debug = 0;
  43 module_param(debug,int,0644);
  44 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
  45
  46 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  47         printk(KERN_DEBUG "%s/2: " fmt, dev->core->name , ## arg)
  48
  49 /* ------------------------------------------------------------------ */
  50
  51 static int cx8802_start_dma(struct cx8802_dev    *dev,
  52                             struct cx88_dmaqueue *q,
  53                             struct cx88_buffer   *buf)
  54 {
  55         struct cx88_core *core = dev->core;
  56
  57         dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n", dev->width, dev->height, buf->vb.field);
  58
  59         /* setup fifo + format */
  60         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
  61                                 dev->ts_packet_size, buf->risc.dma);
  62
  63         /* write TS length to chip */
  64         cx_write(MO_TS_LNGTH, buf->vb.width);
  65
  66         /* FIXME: this needs a review.
  67          * also: move to cx88-blackbird + cx88-dvb source files? */
  68
  69         if (cx88_boards[core->board].dvb) {
  70                 /* negedge driven & software reset */
  71                 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
  72                 udelay(100);
  73                 cx_write(MO_PINMUX_IO, 0x00);
  74                 cx_write(TS_HW_SOP_CNTRL,0x47<<16|188<<4|0x01);
  75                 switch (core->board) {
  76                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
  77                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
  78                 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
  79                 case CX88_BOARD_PCHDTV_HD5500:
  80                         cx_write(TS_SOP_STAT, 1<<13);
  81                         break;
  82                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
  83                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
  84                         cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
  85                         udelay(100);
  86                         break;
  87                 default:
  88                         cx_write(TS_SOP_STAT, 0x00);
  89                         break;
  90                 }
  91                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
  92                 udelay(100);
  93         }
  94
  95         if (cx88_boards[core->board].blackbird) {
  96                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
  97
  98                 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
  99                 udelay(100);
 100
 101                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
 102                 cx_write(TS_VALERR_CNTRL, 0x2000);
 103
 104                 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
 105                 udelay(100);
 106         }
 107
 108         /* reset counter */
 109         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 110         q->count = 1;
 111
 112         /* enable irqs */
 113         dprintk( 1, "setting the interrupt mask\n" );
 114         cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x04);
 115         cx_set(MO_TS_INTMSK,  0x1f0011);
 116
 117         /* start dma */
 118         cx_set(MO_DEV_CNTRL2, (1<<5));
 119         cx_set(MO_TS_DMACNTRL, 0x11);
 120         return 0;
 121 }
 122
 123 static int cx8802_stop_dma(struct cx8802_dev *dev)
 124 {
 125         struct cx88_core *core = dev->core;
 126         dprintk( 1, "cx8802_stop_dma\n" );
 127
 128         /* stop dma */
 129         cx_clear(MO_TS_DMACNTRL, 0x11);
 130
 131         /* disable irqs */
 132         cx_clear(MO_PCI_INTMSK, 0x000004);
 133         cx_clear(MO_TS_INTMSK, 0x1f0011);
 134
 135         /* Reset the controller */
 136         cx_write(TS_GEN_CNTRL, 0xcd);
 137         return 0;
 138 }
 139
 140 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 141                                 struct cx88_dmaqueue *q)
 142 {
 143         struct cx88_buffer *buf;
 144         struct list_head *item;
 145
 146        dprintk( 1, "cx8802_restart_queue\n" );
 147         if (list_empty(&q->active))
 148         {
 149                struct cx88_buffer *prev;
 150                prev = NULL;
 151
 152                dprintk(1, "cx8802_restart_queue: queue is empty\n" );
 153
 154                for (;;) {
 155                        if (list_empty(&q->queued))
 156                                return 0;
 157                        buf = list_entry(q->queued.next, struct cx88_buffer, vb.queue);
 158                        if (NULL == prev) {
 159                                list_del(&buf->vb.queue);
 160                                list_add_tail(&buf->vb.queue,&q->active);
 161                                cx8802_start_dma(dev, q, buf);
 162                                buf->vb.state = STATE_ACTIVE;
 163                                buf->count    = q->count++;
 164                                mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 165                                dprintk(1,"[%p/%d] restart_queue - first active\n",
 166                                        buf,buf->vb.i);
 167
 168                        } else if (prev->vb.width  == buf->vb.width  &&
 169                                   prev->vb.height == buf->vb.height &&
 170                                   prev->fmt       == buf->fmt) {
 171                                list_del(&buf->vb.queue);
 172                                list_add_tail(&buf->vb.queue,&q->active);
 173                                buf->vb.state = STATE_ACTIVE;
 174                                buf->count    = q->count++;
 175                                prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 176                                dprintk(1,"[%p/%d] restart_queue - move to active\n",
 177                                        buf,buf->vb.i);
 178                        } else {
 179                                return 0;
 180                        }
 181                        prev = buf;
 182                }
 183                 return 0;
 184         }
 185
 186         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 187         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 188                 buf, buf->vb.i);
 189         cx8802_start_dma(dev, q, buf);
 190         list_for_each(item,&q->active) {
 191                 buf = list_entry(item, struct cx88_buffer, vb.queue);
 192                 buf->count = q->count++;
 193         }
 194         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 195         return 0;
 196 }
 197
 198 /* ------------------------------------------------------------------ */
 199
 200 int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
 201                         struct cx88_buffer *buf, enum v4l2_field field)
 202 {
 203         int size = dev->ts_packet_size * dev->ts_packet_count;
 204         int rc;
 205
 206         dprintk(1, "%s: %p\n", __FUNCTION__, buf);
 207         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 208                 return -EINVAL;
 209
 210         if (STATE_NEEDS_INIT == buf->vb.state) {
 211                 buf->vb.width  = dev->ts_packet_size;
 212                 buf->vb.height = dev->ts_packet_count;
 213                 buf->vb.size   = size;
 214                 buf->vb.field  = field /*V4L2_FIELD_TOP*/;
 215
 216                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
 217                         goto fail;
 218                 cx88_risc_databuffer(dev->pci, &buf->risc,
 219                                      buf->vb.dma.sglist,
 220                                      buf->vb.width, buf->vb.height);
 221         }
 222         buf->vb.state = STATE_PREPARED;
 223         return 0;
 224
 225  fail:
 226         cx88_free_buffer(q,buf);
 227         return rc;
 228 }
 229
 230 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 231 {
 232         struct cx88_buffer    *prev;
 233         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
 234
 235         dprintk( 1, "cx8802_buf_queue\n" );
 236         /* add jump to stopper */
 237         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 238         buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);
 239
 240         if (list_empty(&cx88q->active)) {
 241                 dprintk( 1, "queue is empty - first active\n" );
 242                 list_add_tail(&buf->vb.queue,&cx88q->active);
 243                 cx8802_start_dma(dev, cx88q, buf);
 244                 buf->vb.state = STATE_ACTIVE;
 245                 buf->count    = cx88q->count++;
 246                 mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
 247                 dprintk(1,"[%p/%d] %s - first active\n",
 248                         buf, buf->vb.i, __FUNCTION__);
 249
 250         } else {
 251                 dprintk( 1, "queue is not empty - append to active\n" );
 252                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
 253                 list_add_tail(&buf->vb.queue,&cx88q->active);
 254                 buf->vb.state = STATE_ACTIVE;
 255                 buf->count    = cx88q->count++;
 256                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 257                 dprintk( 1, "[%p/%d] %s - append to active\n",
 258                         buf, buf->vb.i, __FUNCTION__);
 259         }
 260 }
 261
 262 /* ----------------------------------------------------------- */
 263
 264 static void do_cancel_buffers(struct cx8802_dev *dev, char *reason, int restart)
 265 {
 266         struct cx88_dmaqueue *q = &dev->mpegq;
 267         struct cx88_buffer *buf;
 268         unsigned long flags;
 269
 270         spin_lock_irqsave(&dev->slock,flags);
 271         while (!list_empty(&q->active)) {
 272                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 273                 list_del(&buf->vb.queue);
 274                 buf->vb.state = STATE_ERROR;
 275                 wake_up(&buf->vb.done);
 276                 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
 277                         buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
 278         }
 279         if (restart)
 280         {
 281                 dprintk(1, "restarting queue\n" );
 282                 cx8802_restart_queue(dev,q);
 283         }
 284         spin_unlock_irqrestore(&dev->slock,flags);
 285 }
 286
 287 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 288 {
 289         struct cx88_dmaqueue *q = &dev->mpegq;
 290
 291         dprintk( 1, "cx8802_cancel_buffers" );
 292         del_timer_sync(&q->timeout);
 293         cx8802_stop_dma(dev);
 294         do_cancel_buffers(dev,"cancel",0);
 295 }
 296
 297 static void cx8802_timeout(unsigned long data)
 298 {
 299         struct cx8802_dev *dev = (struct cx8802_dev*)data;
 300
 301         dprintk(0, "%s\n",__FUNCTION__);
 302
 303         if (debug)
 304                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 305         cx8802_stop_dma(dev);
 306         do_cancel_buffers(dev,"timeout",1);
 307 }
 308
 309 static char *cx88_mpeg_irqs[32] = {
 310         "ts_risci1", NULL, NULL, NULL,
 311         "ts_risci2", NULL, NULL, NULL,
 312         "ts_oflow",  NULL, NULL, NULL,
 313         "ts_sync",   NULL, NULL, NULL,
 314         "opc_err", "par_err", "rip_err", "pci_abort",
 315         "ts_err?",
 316 };
 317
 318 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 319 {
 320         struct cx88_core *core = dev->core;
 321         u32 status, mask, count;
 322
 323         dprintk( 1, "cx8802_mpeg_irq\n" );
 324         status = cx_read(MO_TS_INTSTAT);
 325         mask   = cx_read(MO_TS_INTMSK);
 326         if (0 == (status & mask))
 327                 return;
 328
 329         cx_write(MO_TS_INTSTAT, status);
 330
 331         if (debug || (status & mask & ~0xff))
 332                 cx88_print_irqbits(core->name, "irq mpeg ",
 333                                    cx88_mpeg_irqs, status, mask);
 334
 335         /* risc op code error */
 336         if (status & (1 << 16)) {
 337                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 338                 cx_clear(MO_TS_DMACNTRL, 0x11);
 339                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 340         }
 341
 342         /* risc1 y */
 343         if (status & 0x01) {
 344                 dprintk( 1, "wake up\n" );
 345                 spin_lock(&dev->slock);
 346                 count = cx_read(MO_TS_GPCNT);
 347                 cx88_wakeup(dev->core, &dev->mpegq, count);
 348                 spin_unlock(&dev->slock);
 349         }
 350
 351         /* risc2 y */
 352         if (status & 0x10) {
 353                 spin_lock(&dev->slock);
 354                 cx8802_restart_queue(dev,&dev->mpegq);
 355                 spin_unlock(&dev->slock);
 356         }
 357
 358         /* other general errors */
 359         if (status & 0x1f0100) {
 360                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 361                 spin_lock(&dev->slock);
 362                 cx8802_stop_dma(dev);
 363                 cx8802_restart_queue(dev,&dev->mpegq);
 364                 spin_unlock(&dev->slock);
 365         }
 366 }
 367
 368 #define MAX_IRQ_LOOP 10
 369
 370 static irqreturn_t cx8802_irq(int irq, void *dev_id, struct pt_regs *regs)
 371 {
 372         struct cx8802_dev *dev = dev_id;
 373         struct cx88_core *core = dev->core;
 374         u32 status;
 375         int loop, handled = 0;
 376
 377         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 378                 status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x04);
 379                 if (0 == status)
 380                         goto out;
 381                 dprintk( 1, "cx8802_irq\n" );
 382                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 383                 dprintk( 1, "    status: %d\n", status );
 384                 handled = 1;
 385                 cx_write(MO_PCI_INTSTAT, status);
 386
 387                 if (status & core->pci_irqmask)
 388                         cx88_core_irq(core,status);
 389                 if (status & 0x04)
 390                         cx8802_mpeg_irq(dev);
 391         };
 392         if (MAX_IRQ_LOOP == loop) {
 393                 dprintk( 0, "clearing mask\n" );
 394                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 395                        core->name);
 396                 cx_write(MO_PCI_INTMSK,0);
 397         }
 398
 399  out:
 400         return IRQ_RETVAL(handled);
 401 }
 402
 403 /* ----------------------------------------------------------- */
 404 /* exported stuff                                              */
 405
 406 int cx8802_init_common(struct cx8802_dev *dev)
 407 {
 408         struct cx88_core *core = dev->core;
 409         int err;
 410
 411         /* pci init */
 412         if (pci_enable_device(dev->pci))
 413                 return -EIO;
 414         pci_set_master(dev->pci);
 415         if (!pci_dma_supported(dev->pci,0xffffffff)) {
 416                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 417                 return -EIO;
 418         }
 419
 420         pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
 421         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 422         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 423                "latency: %d, mmio: 0x%llx\n", dev->core->name,
 424                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 425                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
 426
 427         /* initialize driver struct */
 428         spin_lock_init(&dev->slock);
 429
 430         /* init dma queue */
 431         INIT_LIST_HEAD(&dev->mpegq.active);
 432         INIT_LIST_HEAD(&dev->mpegq.queued);
 433         dev->mpegq.timeout.function = cx8802_timeout;
 434         dev->mpegq.timeout.data     = (unsigned long)dev;
 435         init_timer(&dev->mpegq.timeout);
 436         cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
 437                           MO_TS_DMACNTRL,0x11,0x00);
 438
 439         /* get irq */
 440         err = request_irq(dev->pci->irq, cx8802_irq,
 441                           IRQF_SHARED | IRQF_DISABLED, dev->core->name, dev);
 442         if (err < 0) {
 443                 printk(KERN_ERR "%s: can't get IRQ %d\n",
 444                        dev->core->name, dev->pci->irq);
 445                 return err;
 446         }
 447         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 448
 449         /* everything worked */
 450         pci_set_drvdata(dev->pci,dev);
 451         return 0;
 452 }
 453
 454 void cx8802_fini_common(struct cx8802_dev *dev)
 455 {
 456         dprintk( 2, "cx8802_fini_common\n" );
 457         cx8802_stop_dma(dev);
 458         pci_disable_device(dev->pci);
 459
 460         /* unregister stuff */
 461         free_irq(dev->pci->irq, dev);
 462         pci_set_drvdata(dev->pci, NULL);
 463
 464         /* free memory */
 465         btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
 466 }
 467
 468 /* ----------------------------------------------------------- */
 469
 470 int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 471 {
 472         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 473         struct cx88_core *core = dev->core;
 474
 475         /* stop mpeg dma */
 476         spin_lock(&dev->slock);
 477         if (!list_empty(&dev->mpegq.active)) {
 478                 dprintk( 2, "suspend\n" );
 479                 printk("%s: suspend mpeg\n", core->name);
 480                 cx8802_stop_dma(dev);
 481                 del_timer(&dev->mpegq.timeout);
 482         }
 483         spin_unlock(&dev->slock);
 484
 485         /* FIXME -- shutdown device */
 486         cx88_shutdown(dev->core);
 487
 488         pci_save_state(pci_dev);
 489         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 490                 pci_disable_device(pci_dev);
 491                 dev->state.disabled = 1;
 492         }
 493         return 0;
 494 }
 495
 496 int cx8802_resume_common(struct pci_dev *pci_dev)
 497 {
 498         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 499         struct cx88_core *core = dev->core;
 500         int err;
 501
 502         if (dev->state.disabled) {
 503                 err=pci_enable_device(pci_dev);
 504                 if (err) {
 505                         printk(KERN_ERR "%s: can't enable device\n",
 506                                                dev->core->name);
 507                         return err;
 508                 }
 509                 dev->state.disabled = 0;
 510         }
 511         err=pci_set_power_state(pci_dev, PCI_D0);
 512         if (err) {
 513                 printk(KERN_ERR "%s: can't enable device\n",
 514                                                dev->core->name);
 515                 pci_disable_device(pci_dev);
 516                 dev->state.disabled = 1;
 517
 518                 return err;
 519         }
 520         pci_restore_state(pci_dev);
 521
 522         /* FIXME: re-initialize hardware */
 523         cx88_reset(dev->core);
 524
 525         /* restart video+vbi capture */
 526         spin_lock(&dev->slock);
 527         if (!list_empty(&dev->mpegq.active)) {
 528                 printk("%s: resume mpeg\n", core->name);
 529                 cx8802_restart_queue(dev,&dev->mpegq);
 530         }
 531         spin_unlock(&dev->slock);
 532
 533         return 0;
 534 }
 535
 536 /* ----------------------------------------------------------- */
 537
 538 EXPORT_SYMBOL(cx8802_buf_prepare);
 539 EXPORT_SYMBOL(cx8802_buf_queue);
 540 EXPORT_SYMBOL(cx8802_cancel_buffers);
 541
 542 EXPORT_SYMBOL(cx8802_init_common);
 543 EXPORT_SYMBOL(cx8802_fini_common);
 544
 545 EXPORT_SYMBOL(cx8802_suspend_common);
 546 EXPORT_SYMBOL(cx8802_resume_common);
 547
 548 /* ----------------------------------------------------------- */
 549 /*
 550  * Local variables:
 551  * c-basic-offset: 8
 552  * End:
 553  * kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
 554  */