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(0, "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                         cx_write(TS_SOP_STAT, 1<<13);
  80                         break;
  81                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
  82                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
  83                         cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
  84                         udelay(100);
  85                         break;
  86                 default:
  87                         cx_write(TS_SOP_STAT, 0x00);
  88                         break;
  89                 }
  90                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
  91                 udelay(100);
  92         }
  93
  94         if (cx88_boards[core->board].blackbird) {
  95                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
  96
  97                 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
  98                 udelay(100);
  99
 100                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
 101                 cx_write(TS_VALERR_CNTRL, 0x2000);
 102
 103                 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
 104                 udelay(100);
 105         }
 106
 107         /* reset counter */
 108         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 109         q->count = 1;
 110
 111         /* enable irqs */
 112         dprintk( 0, "setting the interrupt mask\n" );
 113         cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x04);
 114         cx_set(MO_TS_INTMSK,  0x1f0011);
 115
 116         /* start dma */
 117         cx_set(MO_DEV_CNTRL2, (1<<5));
 118         cx_set(MO_TS_DMACNTRL, 0x11);
 119         return 0;
 120 }
 121
 122 static int cx8802_stop_dma(struct cx8802_dev *dev)
 123 {
 124         struct cx88_core *core = dev->core;
 125         dprintk( 0, "cx8802_stop_dma\n" );
 126
 127         /* stop dma */
 128         cx_clear(MO_TS_DMACNTRL, 0x11);
 129
 130         /* disable irqs */
 131         cx_clear(MO_PCI_INTMSK, 0x000004);
 132         cx_clear(MO_TS_INTMSK, 0x1f0011);
 133
 134         /* Reset the controller */
 135         cx_write(TS_GEN_CNTRL, 0xcd);
 136         return 0;
 137 }
 138
 139 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 140                                 struct cx88_dmaqueue *q)
 141 {
 142         struct cx88_buffer *buf;
 143         struct list_head *item;
 144
 145         dprintk( 0, "cx8802_restart_queue\n" );
 146         if (list_empty(&q->active))
 147         {
 148                 dprintk( 0, "cx8802_restart_queue: queue is empty\n" );
 149                 return 0;
 150         }
 151
 152         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 153         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 154                 buf, buf->vb.i);
 155         cx8802_start_dma(dev, q, buf);
 156         list_for_each(item,&q->active) {
 157                 buf = list_entry(item, struct cx88_buffer, vb.queue);
 158                 buf->count = q->count++;
 159         }
 160         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 161         return 0;
 162 }
 163
 164 /* ------------------------------------------------------------------ */
 165
 166 int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
 167                         struct cx88_buffer *buf, enum v4l2_field field)
 168 {
 169         int size = dev->ts_packet_size * dev->ts_packet_count;
 170         int rc;
 171
 172         dprintk(1, "%s: %p\n", __FUNCTION__, buf);
 173         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 174                 return -EINVAL;
 175
 176         if (STATE_NEEDS_INIT == buf->vb.state) {
 177                 buf->vb.width  = dev->ts_packet_size;
 178                 buf->vb.height = dev->ts_packet_count;
 179                 buf->vb.size   = size;
 180                 buf->vb.field  = field /*V4L2_FIELD_TOP*/;
 181
 182                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
 183                         goto fail;
 184                 cx88_risc_databuffer(dev->pci, &buf->risc,
 185                                      buf->vb.dma.sglist,
 186                                      buf->vb.width, buf->vb.height);
 187         }
 188         buf->vb.state = STATE_PREPARED;
 189         return 0;
 190
 191  fail:
 192         cx88_free_buffer(q,buf);
 193         return rc;
 194 }
 195
 196 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 197 {
 198         struct cx88_buffer    *prev;
 199         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
 200
 201         dprintk( 1, "cx8802_buf_queue\n" );
 202         /* add jump to stopper */
 203         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 204         buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);
 205
 206         if (list_empty(&cx88q->active)) {
 207                 dprintk( 0, "queue is empty - first active\n" );
 208                 list_add_tail(&buf->vb.queue,&cx88q->active);
 209                 cx8802_start_dma(dev, cx88q, buf);
 210                 buf->vb.state = STATE_ACTIVE;
 211                 buf->count    = cx88q->count++;
 212                 mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
 213                 dprintk(0,"[%p/%d] %s - first active\n",
 214                         buf, buf->vb.i, __FUNCTION__);
 215
 216         } else {
 217                 dprintk( 1, "queue is not empty - append to active\n" );
 218                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
 219                 list_add_tail(&buf->vb.queue,&cx88q->active);
 220                 buf->vb.state = STATE_ACTIVE;
 221                 buf->count    = cx88q->count++;
 222                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 223                 dprintk( 1, "[%p/%d] %s - append to active\n",
 224                         buf, buf->vb.i, __FUNCTION__);
 225         }
 226 }
 227
 228 /* ----------------------------------------------------------- */
 229
 230 static void do_cancel_buffers(struct cx8802_dev *dev, char *reason, int restart)
 231 {
 232         struct cx88_dmaqueue *q = &dev->mpegq;
 233         struct cx88_buffer *buf;
 234         unsigned long flags;
 235
 236         spin_lock_irqsave(&dev->slock,flags);
 237         while (!list_empty(&q->active)) {
 238                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 239                 list_del(&buf->vb.queue);
 240                 buf->vb.state = STATE_ERROR;
 241                 wake_up(&buf->vb.done);
 242                 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
 243                         buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
 244         }
 245         if (restart)
 246         {
 247                 dprintk(0, "restarting queue\n" );
 248                 cx8802_restart_queue(dev,q);
 249         }
 250         spin_unlock_irqrestore(&dev->slock,flags);
 251 }
 252
 253 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 254 {
 255         struct cx88_dmaqueue *q = &dev->mpegq;
 256
 257         dprintk( 1, "cx8802_cancel_buffers" );
 258         del_timer_sync(&q->timeout);
 259         cx8802_stop_dma(dev);
 260         do_cancel_buffers(dev,"cancel",0);
 261 }
 262
 263 static void cx8802_timeout(unsigned long data)
 264 {
 265         struct cx8802_dev *dev = (struct cx8802_dev*)data;
 266
 267         dprintk(0, "%s\n",__FUNCTION__);
 268
 269         if (debug)
 270                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 271         cx8802_stop_dma(dev);
 272         do_cancel_buffers(dev,"timeout",1);
 273 }
 274
 275 static char *cx88_mpeg_irqs[32] = {
 276         "ts_risci1", NULL, NULL, NULL,
 277         "ts_risci2", NULL, NULL, NULL,
 278         "ts_oflow",  NULL, NULL, NULL,
 279         "ts_sync",   NULL, NULL, NULL,
 280         "opc_err", "par_err", "rip_err", "pci_abort",
 281         "ts_err?",
 282 };
 283
 284 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 285 {
 286         struct cx88_core *core = dev->core;
 287         u32 status, mask, count;
 288
 289         dprintk( 1, "cx8802_mpeg_irq\n" );
 290         status = cx_read(MO_TS_INTSTAT);
 291         mask   = cx_read(MO_TS_INTMSK);
 292         if (0 == (status & mask))
 293                 return;
 294
 295         cx_write(MO_TS_INTSTAT, status);
 296
 297         if (debug || (status & mask & ~0xff))
 298                 cx88_print_irqbits(core->name, "irq mpeg ",
 299                                    cx88_mpeg_irqs, status, mask);
 300
 301         /* risc op code error */
 302         if (status & (1 << 16)) {
 303                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 304                 cx_clear(MO_TS_DMACNTRL, 0x11);
 305                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 306         }
 307
 308         /* risc1 y */
 309         if (status & 0x01) {
 310                 dprintk( 1, "wake up\n" );
 311                 spin_lock(&dev->slock);
 312                 count = cx_read(MO_TS_GPCNT);
 313                 cx88_wakeup(dev->core, &dev->mpegq, count);
 314                 spin_unlock(&dev->slock);
 315         }
 316
 317         /* risc2 y */
 318         if (status & 0x10) {
 319                 spin_lock(&dev->slock);
 320                 cx8802_restart_queue(dev,&dev->mpegq);
 321                 spin_unlock(&dev->slock);
 322         }
 323
 324         /* other general errors */
 325         if (status & 0x1f0100) {
 326                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 327                 spin_lock(&dev->slock);
 328                 cx8802_stop_dma(dev);
 329                 cx8802_restart_queue(dev,&dev->mpegq);
 330                 spin_unlock(&dev->slock);
 331         }
 332 }
 333
 334 #define MAX_IRQ_LOOP 10
 335
 336 static irqreturn_t cx8802_irq(int irq, void *dev_id, struct pt_regs *regs)
 337 {
 338         struct cx8802_dev *dev = dev_id;
 339         struct cx88_core *core = dev->core;
 340         u32 status;
 341         int loop, handled = 0;
 342
 343         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 344                 status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x04);
 345                 if (0 == status)
 346                         goto out;
 347                 dprintk( 1, "cx8802_irq\n" );
 348                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 349                 dprintk( 1, "    status: %d\n", status );
 350                 handled = 1;
 351                 cx_write(MO_PCI_INTSTAT, status);
 352
 353                 if (status & core->pci_irqmask)
 354                         cx88_core_irq(core,status);
 355                 if (status & 0x04)
 356                         cx8802_mpeg_irq(dev);
 357         };
 358         if (MAX_IRQ_LOOP == loop) {
 359                 dprintk( 0, "clearing mask\n" );
 360                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 361                        core->name);
 362                 cx_write(MO_PCI_INTMSK,0);
 363         }
 364
 365  out:
 366         return IRQ_RETVAL(handled);
 367 }
 368
 369 /* ----------------------------------------------------------- */
 370 /* exported stuff                                              */
 371
 372 int cx8802_init_common(struct cx8802_dev *dev)
 373 {
 374         struct cx88_core *core = dev->core;
 375         int err;
 376
 377         /* pci init */
 378         if (pci_enable_device(dev->pci))
 379                 return -EIO;
 380         pci_set_master(dev->pci);
 381         if (!pci_dma_supported(dev->pci,0xffffffff)) {
 382                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 383                 return -EIO;
 384         }
 385
 386         pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
 387         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 388         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 389                "latency: %d, mmio: 0x%lx\n", dev->core->name,
 390                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 391                dev->pci_lat,pci_resource_start(dev->pci,0));
 392
 393         /* initialize driver struct */
 394         spin_lock_init(&dev->slock);
 395
 396         /* init dma queue */
 397         INIT_LIST_HEAD(&dev->mpegq.active);
 398         INIT_LIST_HEAD(&dev->mpegq.queued);
 399         dev->mpegq.timeout.function = cx8802_timeout;
 400         dev->mpegq.timeout.data     = (unsigned long)dev;
 401         init_timer(&dev->mpegq.timeout);
 402         cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
 403                           MO_TS_DMACNTRL,0x11,0x00);
 404
 405         /* get irq */
 406         err = request_irq(dev->pci->irq, cx8802_irq,
 407                           SA_SHIRQ | SA_INTERRUPT, dev->core->name, dev);
 408         if (err < 0) {
 409                 printk(KERN_ERR "%s: can't get IRQ %d\n",
 410                        dev->core->name, dev->pci->irq);
 411                 return err;
 412         }
 413         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 414
 415         /* everything worked */
 416         pci_set_drvdata(dev->pci,dev);
 417         return 0;
 418 }
 419
 420 void cx8802_fini_common(struct cx8802_dev *dev)
 421 {
 422         dprintk( 2, "cx8802_fini_common\n" );
 423         cx8802_stop_dma(dev);
 424         pci_disable_device(dev->pci);
 425
 426         /* unregister stuff */
 427         free_irq(dev->pci->irq, dev);
 428         pci_set_drvdata(dev->pci, NULL);
 429
 430         /* free memory */
 431         btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
 432 }
 433
 434 /* ----------------------------------------------------------- */
 435
 436 int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 437 {
 438         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 439         struct cx88_core *core = dev->core;
 440
 441         /* stop mpeg dma */
 442         spin_lock(&dev->slock);
 443         if (!list_empty(&dev->mpegq.active)) {
 444                 dprintk( 2, "suspend\n" );
 445                 printk("%s: suspend mpeg\n", core->name);
 446                 cx8802_stop_dma(dev);
 447                 del_timer(&dev->mpegq.timeout);
 448         }
 449         spin_unlock(&dev->slock);
 450
 451         /* FIXME -- shutdown device */
 452         cx88_shutdown(dev->core);
 453
 454         pci_save_state(pci_dev);
 455         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 456                 pci_disable_device(pci_dev);
 457                 dev->state.disabled = 1;
 458         }
 459         return 0;
 460 }
 461
 462 int cx8802_resume_common(struct pci_dev *pci_dev)
 463 {
 464         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 465         struct cx88_core *core = dev->core;
 466         int err;
 467
 468         if (dev->state.disabled) {
 469                 err=pci_enable_device(pci_dev);
 470                 if (err) {
 471                         printk(KERN_ERR "%s: can't enable device\n",
 472                                                dev->core->name);
 473                         return err;
 474                 }
 475                 dev->state.disabled = 0;
 476         }
 477         err=pci_set_power_state(pci_dev, PCI_D0);
 478         if (err) {
 479                 printk(KERN_ERR "%s: can't enable device\n",
 480                                                dev->core->name);
 481                 pci_disable_device(pci_dev);
 482                 dev->state.disabled = 1;
 483
 484                 return err;
 485         }
 486         pci_restore_state(pci_dev);
 487
 488         /* FIXME: re-initialize hardware */
 489         cx88_reset(dev->core);
 490
 491         /* restart video+vbi capture */
 492         spin_lock(&dev->slock);
 493         if (!list_empty(&dev->mpegq.active)) {
 494                 printk("%s: resume mpeg\n", core->name);
 495                 cx8802_restart_queue(dev,&dev->mpegq);
 496         }
 497         spin_unlock(&dev->slock);
 498
 499         return 0;
 500 }
 501
 502 /* ----------------------------------------------------------- */
 503
 504 EXPORT_SYMBOL(cx8802_buf_prepare);
 505 EXPORT_SYMBOL(cx8802_buf_queue);
 506 EXPORT_SYMBOL(cx8802_cancel_buffers);
 507
 508 EXPORT_SYMBOL(cx8802_init_common);
 509 EXPORT_SYMBOL(cx8802_fini_common);
 510
 511 EXPORT_SYMBOL(cx8802_suspend_common);
 512 EXPORT_SYMBOL(cx8802_resume_common);
 513
 514 /* ----------------------------------------------------------- */
 515 /*
 516  * Local variables:
 517  * c-basic-offset: 8
 518  * End:
 519  * 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
 520  */