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

   1 /*
   2  * $Id: cx88-mpeg.c,v 1.26 2005/06/03 13:31:51 mchehab Exp $
   3  *
   4  *  Support for the mpeg transport stream transfers
   5  *  PCI function #2 of the cx2388x.
   6  *
   7  *    (c) 2004 Jelle Foks <jelle@foks.8m.com>
   8  *    (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
   9  *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/init.h>
  29 #include <linux/device.h>
  30 #include <linux/interrupt.h>
  31 #include <asm/delay.h>
  32
  33 #include "cx88.h"
  34
  35 /* ------------------------------------------------------------------ */
  36
  37 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
  38 MODULE_AUTHOR("Jelle Foks <jelle@foks.8m.com>");
  39 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
  40 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  41 MODULE_LICENSE("GPL");
  42
  43 static unsigned int debug = 0;
  44 module_param(debug,int,0644);
  45 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
  46
  47 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  48         printk(KERN_DEBUG "%s/2: " fmt, dev->core->name , ## arg)
  49
  50 /* ------------------------------------------------------------------ */
  51
  52 static int cx8802_start_dma(struct cx8802_dev    *dev,
  53                             struct cx88_dmaqueue *q,
  54                             struct cx88_buffer   *buf)
  55 {
  56         struct cx88_core *core = dev->core;
  57
  58         dprintk(0, "cx8802_start_dma %d\n", buf->vb.width);
  59
  60         /* setup fifo + format */
  61         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
  62                                 dev->ts_packet_size, buf->risc.dma);
  63
  64         /* write TS length to chip */
  65         cx_write(MO_TS_LNGTH, buf->vb.width);
  66
  67 #if 1
  68         /* FIXME: this needs a review.
  69          * also: move to cx88-blackbird + cx88-dvb source files? */
  70
  71         if (cx88_boards[core->board].dvb) {
  72                 /* negedge driven & software reset */
  73                 cx_write(TS_GEN_CNTRL, 0x40);
  74                 udelay(100);
  75                 cx_write(MO_PINMUX_IO, 0x00);
  76                 cx_write(TS_HW_SOP_CNTRL,47<<16|188<<4|0x00);
  77                 cx_write(TS_SOP_STAT,0x00);
  78                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
  79                 udelay(100);
  80         }
  81
  82         if (cx88_boards[core->board].blackbird) {
  83                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
  84
  85                 // cx_write(TS_F2_CMD_STAT_MM, 0x2900106); /* F2_CMD_STAT_MM defaults + master + memory space */
  86                 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
  87                 udelay(100);
  88
  89                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
  90                 //cx_write(TS_HW_SOP_CNTRL, 0x2F0BC0); /* mpeg start byte ts: 0x2F0BC0 ? */
  91                 cx_write(TS_VALERR_CNTRL, 0x2000);
  92
  93                 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
  94                 udelay(100);
  95         }
  96 #endif
  97
  98         /* reset counter */
  99         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 100         q->count = 1;
 101
 102         /* enable irqs */
 103         dprintk( 0, "setting the interrupt mask\n" );
 104         cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x04);
 105         cx_set(MO_TS_INTMSK,  0x1f0011);
 106         //cx_write(MO_TS_INTMSK,  0x0f0011);
 107
 108         /* start dma */
 109         cx_set(MO_DEV_CNTRL2, (1<<5));
 110         cx_set(MO_TS_DMACNTRL, 0x11);
 111         return 0;
 112 }
 113
 114 static int cx8802_stop_dma(struct cx8802_dev *dev)
 115 {
 116         struct cx88_core *core = dev->core;
 117         dprintk( 0, "cx8802_stop_dma\n" );
 118
 119         /* stop dma */
 120         cx_clear(MO_TS_DMACNTRL, 0x11);
 121
 122         /* disable irqs */
 123         cx_clear(MO_PCI_INTMSK, 0x000004);
 124         cx_clear(MO_TS_INTMSK, 0x1f0011);
 125
 126         /* Reset the controller */
 127         cx_write(TS_GEN_CNTRL, 0xcd);
 128         return 0;
 129 }
 130
 131 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 132                                 struct cx88_dmaqueue *q)
 133 {
 134         struct cx88_buffer *buf;
 135         struct list_head *item;
 136
 137         dprintk( 0, "cx8802_restart_queue\n" );
 138         if (list_empty(&q->active))
 139         {
 140                 dprintk( 0, "cx8802_restart_queue: queue is empty\n" );
 141                 return 0;
 142         }
 143
 144         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 145         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 146                 buf, buf->vb.i);
 147         cx8802_start_dma(dev, q, buf);
 148         list_for_each(item,&q->active) {
 149                 buf = list_entry(item, struct cx88_buffer, vb.queue);
 150                 buf->count = q->count++;
 151         }
 152         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 153         return 0;
 154 }
 155
 156 /* ------------------------------------------------------------------ */
 157
 158 int cx8802_buf_prepare(struct cx8802_dev *dev, struct cx88_buffer *buf)
 159 {
 160         int size = dev->ts_packet_size * dev->ts_packet_count;
 161         int rc;
 162
 163         dprintk(1, "%s: %p\n", __FUNCTION__, buf);
 164         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 165                 return -EINVAL;
 166
 167         if (STATE_NEEDS_INIT == buf->vb.state) {
 168                 buf->vb.width  = dev->ts_packet_size;
 169                 buf->vb.height = dev->ts_packet_count;
 170                 buf->vb.size   = size;
 171                 buf->vb.field  = V4L2_FIELD_TOP;
 172
 173                 if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL)))
 174                         goto fail;
 175                 cx88_risc_databuffer(dev->pci, &buf->risc,
 176                                      buf->vb.dma.sglist,
 177                                      buf->vb.width, buf->vb.height);
 178         }
 179         buf->vb.state = STATE_PREPARED;
 180         return 0;
 181
 182  fail:
 183         cx88_free_buffer(dev->pci,buf);
 184         return rc;
 185 }
 186
 187 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 188 {
 189         struct cx88_buffer    *prev;
 190         struct cx88_dmaqueue  *q    = &dev->mpegq;
 191
 192         dprintk( 1, "cx8802_buf_queue\n" );
 193         /* add jump to stopper */
 194         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 195         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 196
 197         if (list_empty(&q->active)) {
 198                 dprintk( 0, "queue is empty - first active\n" );
 199                 list_add_tail(&buf->vb.queue,&q->active);
 200                 cx8802_start_dma(dev, q, buf);
 201                 buf->vb.state = STATE_ACTIVE;
 202                 buf->count    = q->count++;
 203                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 204                 dprintk(0,"[%p/%d] %s - first active\n",
 205                         buf, buf->vb.i, __FUNCTION__);
 206                 //udelay(100);
 207
 208         } else {
 209                 dprintk( 1, "queue is not empty - append to active\n" );
 210                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
 211                 list_add_tail(&buf->vb.queue,&q->active);
 212                 buf->vb.state = STATE_ACTIVE;
 213                 buf->count    = q->count++;
 214                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 215                 dprintk( 1, "[%p/%d] %s - append to active\n",
 216                         buf, buf->vb.i, __FUNCTION__);
 217                 //udelay(100);
 218         }
 219 }
 220
 221 /* ----------------------------------------------------------- */
 222
 223 static void do_cancel_buffers(struct cx8802_dev *dev, char *reason, int restart)
 224 {
 225         struct cx88_dmaqueue *q = &dev->mpegq;
 226         struct cx88_buffer *buf;
 227         unsigned long flags;
 228
 229         spin_lock_irqsave(&dev->slock,flags);
 230         while (!list_empty(&q->active)) {
 231                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 232                 list_del(&buf->vb.queue);
 233                 buf->vb.state = STATE_ERROR;
 234                 wake_up(&buf->vb.done);
 235                 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
 236                         buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
 237         }
 238         if (restart)
 239         {
 240                 dprintk(0, "restarting queue\n" );
 241                 cx8802_restart_queue(dev,q);
 242         }
 243         spin_unlock_irqrestore(&dev->slock,flags);
 244 }
 245
 246 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 247 {
 248         struct cx88_dmaqueue *q = &dev->mpegq;
 249
 250         dprintk( 1, "cx8802_cancel_buffers" );
 251         del_timer_sync(&q->timeout);
 252         cx8802_stop_dma(dev);
 253         do_cancel_buffers(dev,"cancel",0);
 254 }
 255
 256 static void cx8802_timeout(unsigned long data)
 257 {
 258         struct cx8802_dev *dev = (struct cx8802_dev*)data;
 259
 260         dprintk(0, "%s\n",__FUNCTION__);
 261
 262         if (debug)
 263                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 264         cx8802_stop_dma(dev);
 265         do_cancel_buffers(dev,"timeout",1);
 266 }
 267
 268 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 269 {
 270         struct cx88_core *core = dev->core;
 271         u32 status, mask, count;
 272
 273         dprintk( 1, "cx8802_mpeg_irq\n" );
 274         status = cx_read(MO_TS_INTSTAT);
 275         mask   = cx_read(MO_TS_INTMSK);
 276         if (0 == (status & mask))
 277                 return;
 278
 279         cx_write(MO_TS_INTSTAT, status);
 280 #if 0
 281         cx88_print_irqbits(core->name, "irq mpeg ",
 282                         cx88_mpeg_irqs, status, mask);
 283 #endif
 284         if (debug || (status & mask & ~0xff))
 285                 cx88_print_irqbits(core->name, "irq mpeg ",
 286                                    cx88_mpeg_irqs, status, mask);
 287
 288         /* risc op code error */
 289         if (status & (1 << 16)) {
 290                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 291                 cx_clear(MO_TS_DMACNTRL, 0x11);
 292                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 293         }
 294
 295         /* risc1 y */
 296         if (status & 0x01) {
 297                 dprintk( 1, "wake up\n" );
 298                 spin_lock(&dev->slock);
 299                 count = cx_read(MO_TS_GPCNT);
 300                 cx88_wakeup(dev->core, &dev->mpegq, count);
 301                 spin_unlock(&dev->slock);
 302         }
 303
 304         /* risc2 y */
 305         if (status & 0x10) {
 306                 spin_lock(&dev->slock);
 307                 cx8802_restart_queue(dev,&dev->mpegq);
 308                 spin_unlock(&dev->slock);
 309         }
 310
 311         /* other general errors */
 312         if (status & 0x1f0100) {
 313                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 314                 spin_lock(&dev->slock);
 315                 cx8802_stop_dma(dev);
 316                 cx8802_restart_queue(dev,&dev->mpegq);
 317                 spin_unlock(&dev->slock);
 318         }
 319 }
 320
 321 #define MAX_IRQ_LOOP 10
 322
 323 static irqreturn_t cx8802_irq(int irq, void *dev_id, struct pt_regs *regs)
 324 {
 325         struct cx8802_dev *dev = dev_id;
 326         struct cx88_core *core = dev->core;
 327         u32 status;
 328         int loop, handled = 0;
 329
 330         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 331                 status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x04);
 332                 if (0 == status)
 333                         goto out;
 334                 dprintk( 1, "cx8802_irq\n" );
 335                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 336                 dprintk( 1, "    status: %d\n", status );
 337                 handled = 1;
 338                 cx_write(MO_PCI_INTSTAT, status);
 339
 340                 if (status & core->pci_irqmask)
 341                         cx88_core_irq(core,status);
 342                 if (status & 0x04)
 343                         cx8802_mpeg_irq(dev);
 344         };
 345         if (MAX_IRQ_LOOP == loop) {
 346                 dprintk( 0, "clearing mask\n" );
 347                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 348                        core->name);
 349                 cx_write(MO_PCI_INTMSK,0);
 350         }
 351
 352  out:
 353         return IRQ_RETVAL(handled);
 354 }
 355
 356 /* ----------------------------------------------------------- */
 357 /* exported stuff                                              */
 358
 359 int cx8802_init_common(struct cx8802_dev *dev)
 360 {
 361         struct cx88_core *core = dev->core;
 362         int err;
 363
 364         /* pci init */
 365         if (pci_enable_device(dev->pci))
 366                 return -EIO;
 367         pci_set_master(dev->pci);
 368         if (!pci_dma_supported(dev->pci,0xffffffff)) {
 369                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 370                 return -EIO;
 371         }
 372
 373         pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
 374         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 375         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 376                "latency: %d, mmio: 0x%lx\n", dev->core->name,
 377                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 378                dev->pci_lat,pci_resource_start(dev->pci,0));
 379
 380         /* initialize driver struct */
 381         init_MUTEX(&dev->lock);
 382         spin_lock_init(&dev->slock);
 383
 384         /* init dma queue */
 385         INIT_LIST_HEAD(&dev->mpegq.active);
 386         INIT_LIST_HEAD(&dev->mpegq.queued);
 387         dev->mpegq.timeout.function = cx8802_timeout;
 388         dev->mpegq.timeout.data     = (unsigned long)dev;
 389         init_timer(&dev->mpegq.timeout);
 390         cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
 391                           MO_TS_DMACNTRL,0x11,0x00);
 392
 393         /* get irq */
 394         err = request_irq(dev->pci->irq, cx8802_irq,
 395                           SA_SHIRQ | SA_INTERRUPT, dev->core->name, dev);
 396         if (err < 0) {
 397                 printk(KERN_ERR "%s: can't get IRQ %d\n",
 398                        dev->core->name, dev->pci->irq);
 399                 return err;
 400         }
 401         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 402
 403         /* everything worked */
 404         pci_set_drvdata(dev->pci,dev);
 405         return 0;
 406 }
 407
 408 void cx8802_fini_common(struct cx8802_dev *dev)
 409 {
 410         dprintk( 2, "cx8802_fini_common\n" );
 411         cx8802_stop_dma(dev);
 412         pci_disable_device(dev->pci);
 413
 414         /* unregister stuff */
 415         free_irq(dev->pci->irq, dev);
 416         pci_set_drvdata(dev->pci, NULL);
 417
 418         /* free memory */
 419         btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
 420 }
 421
 422 /* ----------------------------------------------------------- */
 423
 424 int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 425 {
 426         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 427         struct cx88_core *core = dev->core;
 428
 429         /* stop mpeg dma */
 430         spin_lock(&dev->slock);
 431         if (!list_empty(&dev->mpegq.active)) {
 432                 dprintk( 2, "suspend\n" );
 433                 printk("%s: suspend mpeg\n", core->name);
 434                 cx8802_stop_dma(dev);
 435                 del_timer(&dev->mpegq.timeout);
 436         }
 437         spin_unlock(&dev->slock);
 438
 439 #if 1
 440         /* FIXME -- shutdown device */
 441         cx88_shutdown(dev->core);
 442 #endif
 443
 444         pci_save_state(pci_dev);
 445         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 446                 pci_disable_device(pci_dev);
 447                 dev->state.disabled = 1;
 448         }
 449         return 0;
 450 }
 451
 452 int cx8802_resume_common(struct pci_dev *pci_dev)
 453 {
 454         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 455         struct cx88_core *core = dev->core;
 456
 457         if (dev->state.disabled) {
 458                 pci_enable_device(pci_dev);
 459                 dev->state.disabled = 0;
 460         }
 461         pci_set_power_state(pci_dev, PCI_D0);
 462         pci_restore_state(pci_dev);
 463
 464 #if 1
 465         /* FIXME: re-initialize hardware */
 466         cx88_reset(dev->core);
 467 #endif
 468
 469         /* restart video+vbi capture */
 470         spin_lock(&dev->slock);
 471         if (!list_empty(&dev->mpegq.active)) {
 472                 printk("%s: resume mpeg\n", core->name);
 473                 cx8802_restart_queue(dev,&dev->mpegq);
 474         }
 475         spin_unlock(&dev->slock);
 476
 477         return 0;
 478 }
 479
 480 /* ----------------------------------------------------------- */
 481
 482 EXPORT_SYMBOL(cx8802_buf_prepare);
 483 EXPORT_SYMBOL(cx8802_buf_queue);
 484 EXPORT_SYMBOL(cx8802_cancel_buffers);
 485
 486 EXPORT_SYMBOL(cx8802_init_common);
 487 EXPORT_SYMBOL(cx8802_fini_common);
 488
 489 EXPORT_SYMBOL(cx8802_suspend_common);
 490 EXPORT_SYMBOL(cx8802_resume_common);
 491
 492 /* ----------------------------------------------------------- */
 493 /*
 494  * Local variables:
 495  * c-basic-offset: 8
 496  * End:
 497  * 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
 498  */