kernel/drivers/media/pci/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.us>
   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/slab.h>
  27 #include <linux/init.h>
  28 #include <linux/device.h>
  29 #include <linux/dma-mapping.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.us>");
  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 MODULE_VERSION(CX88_VERSION);
  43
  44 static unsigned int debug;
  45 module_param(debug,int,0644);
  46 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
  47
  48 #define dprintk(level, fmt, arg...) do {                                       \
  49         if (debug + 1 > level)                                                 \
  50                 printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg); \
  51 } while(0)
  52
  53 #define mpeg_dbg(level, fmt, arg...) do {                                 \
  54         if (debug + 1 > level)                                            \
  55                 printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg); \
  56 } while(0)
  57
  58 #if defined(CONFIG_MODULES) && defined(MODULE)
  59 static void request_module_async(struct work_struct *work)
  60 {
  61         struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);
  62
  63         if (dev->core->board.mpeg & CX88_MPEG_DVB)
  64                 request_module("cx88-dvb");
  65         if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
  66                 request_module("cx88-blackbird");
  67 }
  68
  69 static void request_modules(struct cx8802_dev *dev)
  70 {
  71         INIT_WORK(&dev->request_module_wk, request_module_async);
  72         schedule_work(&dev->request_module_wk);
  73 }
  74
  75 static void flush_request_modules(struct cx8802_dev *dev)
  76 {
  77         flush_work(&dev->request_module_wk);
  78 }
  79 #else
  80 #define request_modules(dev)
  81 #define flush_request_modules(dev)
  82 #endif /* CONFIG_MODULES */
  83
  84
  85 static LIST_HEAD(cx8802_devlist);
  86 static DEFINE_MUTEX(cx8802_mutex);
  87 /* ------------------------------------------------------------------ */
  88
  89 int cx8802_start_dma(struct cx8802_dev    *dev,
  90                             struct cx88_dmaqueue *q,
  91                             struct cx88_buffer   *buf)
  92 {
  93         struct cx88_core *core = dev->core;
  94
  95         dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
  96                 core->width, core->height, core->field);
  97
  98         /* setup fifo + format */
  99         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
 100                                 dev->ts_packet_size, buf->risc.dma);
 101
 102         /* write TS length to chip */
 103         cx_write(MO_TS_LNGTH, dev->ts_packet_size);
 104
 105         /* FIXME: this needs a review.
 106          * also: move to cx88-blackbird + cx88-dvb source files? */
 107
 108         dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);
 109
 110         if ( (core->active_type_id == CX88_MPEG_DVB) &&
 111                 (core->board.mpeg & CX88_MPEG_DVB) ) {
 112
 113                 dprintk( 1, "cx8802_start_dma doing .dvb\n");
 114                 /* negedge driven & software reset */
 115                 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
 116                 udelay(100);
 117                 cx_write(MO_PINMUX_IO, 0x00);
 118                 cx_write(TS_HW_SOP_CNTRL, 0x47<<16|188<<4|0x01);
 119                 switch (core->boardnr) {
 120                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
 121                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
 122                 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
 123                 case CX88_BOARD_PCHDTV_HD5500:
 124                         cx_write(TS_SOP_STAT, 1<<13);
 125                         break;
 126                 case CX88_BOARD_SAMSUNG_SMT_7020:
 127                         cx_write(TS_SOP_STAT, 0x00);
 128                         break;
 129                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 130                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 131                         cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
 132                         udelay(100);
 133                         break;
 134                 case CX88_BOARD_HAUPPAUGE_HVR1300:
 135                         /* Enable MPEG parallel IO and video signal pins */
 136                         cx_write(MO_PINMUX_IO, 0x88);
 137                         cx_write(TS_SOP_STAT, 0);
 138                         cx_write(TS_VALERR_CNTRL, 0);
 139                         break;
 140                 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 141                         /* Enable MPEG parallel IO and video signal pins */
 142                         cx_write(MO_PINMUX_IO, 0x88);
 143                         cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
 144                         dev->ts_gen_cntrl = 5;
 145                         cx_write(TS_SOP_STAT, 0);
 146                         cx_write(TS_VALERR_CNTRL, 0);
 147                         udelay(100);
 148                         break;
 149                 default:
 150                         cx_write(TS_SOP_STAT, 0x00);
 151                         break;
 152                 }
 153                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
 154                 udelay(100);
 155         } else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
 156                 (core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
 157                 dprintk( 1, "cx8802_start_dma doing .blackbird\n");
 158                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
 159
 160                 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
 161                 udelay(100);
 162
 163                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
 164                 cx_write(TS_VALERR_CNTRL, 0x2000);
 165
 166                 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
 167                 udelay(100);
 168         } else {
 169                 printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __func__,
 170                         core->board.mpeg );
 171                 return -EINVAL;
 172         }
 173
 174         /* reset counter */
 175         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 176         q->count = 1;
 177
 178         /* enable irqs */
 179         dprintk( 1, "setting the interrupt mask\n" );
 180         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
 181         cx_set(MO_TS_INTMSK,  0x1f0011);
 182
 183         /* start dma */
 184         cx_set(MO_DEV_CNTRL2, (1<<5));
 185         cx_set(MO_TS_DMACNTRL, 0x11);
 186         return 0;
 187 }
 188
 189 static int cx8802_stop_dma(struct cx8802_dev *dev)
 190 {
 191         struct cx88_core *core = dev->core;
 192         dprintk( 1, "cx8802_stop_dma\n" );
 193
 194         /* stop dma */
 195         cx_clear(MO_TS_DMACNTRL, 0x11);
 196
 197         /* disable irqs */
 198         cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
 199         cx_clear(MO_TS_INTMSK, 0x1f0011);
 200
 201         /* Reset the controller */
 202         cx_write(TS_GEN_CNTRL, 0xcd);
 203         return 0;
 204 }
 205
 206 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 207                                 struct cx88_dmaqueue *q)
 208 {
 209         struct cx88_buffer *buf;
 210
 211         dprintk( 1, "cx8802_restart_queue\n" );
 212         if (list_empty(&q->active))
 213                 return 0;
 214
 215         buf = list_entry(q->active.next, struct cx88_buffer, list);
 216         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 217                 buf, buf->vb.v4l2_buf.index);
 218         cx8802_start_dma(dev, q, buf);
 219         list_for_each_entry(buf, &q->active, list)
 220                 buf->count = q->count++;
 221         return 0;
 222 }
 223
 224 /* ------------------------------------------------------------------ */
 225
 226 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
 227                         struct cx88_buffer *buf)
 228 {
 229         int size = dev->ts_packet_size * dev->ts_packet_count;
 230         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb, 0);
 231         struct cx88_riscmem *risc = &buf->risc;
 232         int rc;
 233
 234         if (vb2_plane_size(&buf->vb, 0) < size)
 235                 return -EINVAL;
 236         vb2_set_plane_payload(&buf->vb, 0, size);
 237
 238         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
 239                              dev->ts_packet_size, dev->ts_packet_count, 0);
 240         if (rc) {
 241                 if (risc->cpu)
 242                         pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
 243                 memset(risc, 0, sizeof(*risc));
 244                 return rc;
 245         }
 246         return 0;
 247 }
 248
 249 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 250 {
 251         struct cx88_buffer    *prev;
 252         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
 253
 254         dprintk( 1, "cx8802_buf_queue\n" );
 255         /* add jump to start */
 256         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
 257         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 258         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
 259
 260         if (list_empty(&cx88q->active)) {
 261                 dprintk( 1, "queue is empty - first active\n" );
 262                 list_add_tail(&buf->list, &cx88q->active);
 263                 buf->count    = cx88q->count++;
 264                 dprintk(1,"[%p/%d] %s - first active\n",
 265                         buf, buf->vb.v4l2_buf.index, __func__);
 266
 267         } else {
 268                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 269                 dprintk( 1, "queue is not empty - append to active\n" );
 270                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
 271                 list_add_tail(&buf->list, &cx88q->active);
 272                 buf->count    = cx88q->count++;
 273                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 274                 dprintk( 1, "[%p/%d] %s - append to active\n",
 275                         buf, buf->vb.v4l2_buf.index, __func__);
 276         }
 277 }
 278
 279 /* ----------------------------------------------------------- */
 280
 281 static void do_cancel_buffers(struct cx8802_dev *dev)
 282 {
 283         struct cx88_dmaqueue *q = &dev->mpegq;
 284         struct cx88_buffer *buf;
 285         unsigned long flags;
 286
 287         spin_lock_irqsave(&dev->slock,flags);
 288         while (!list_empty(&q->active)) {
 289                 buf = list_entry(q->active.next, struct cx88_buffer, list);
 290                 list_del(&buf->list);
 291                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 292         }
 293         spin_unlock_irqrestore(&dev->slock,flags);
 294 }
 295
 296 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 297 {
 298         dprintk( 1, "cx8802_cancel_buffers" );
 299         cx8802_stop_dma(dev);
 300         do_cancel_buffers(dev);
 301 }
 302
 303 static const char * cx88_mpeg_irqs[32] = {
 304         "ts_risci1", NULL, NULL, NULL,
 305         "ts_risci2", NULL, NULL, NULL,
 306         "ts_oflow",  NULL, NULL, NULL,
 307         "ts_sync",   NULL, NULL, NULL,
 308         "opc_err", "par_err", "rip_err", "pci_abort",
 309         "ts_err?",
 310 };
 311
 312 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 313 {
 314         struct cx88_core *core = dev->core;
 315         u32 status, mask, count;
 316
 317         dprintk( 1, "cx8802_mpeg_irq\n" );
 318         status = cx_read(MO_TS_INTSTAT);
 319         mask   = cx_read(MO_TS_INTMSK);
 320         if (0 == (status & mask))
 321                 return;
 322
 323         cx_write(MO_TS_INTSTAT, status);
 324
 325         if (debug || (status & mask & ~0xff))
 326                 cx88_print_irqbits(core->name, "irq mpeg ",
 327                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
 328                                    status, mask);
 329
 330         /* risc op code error */
 331         if (status & (1 << 16)) {
 332                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 333                 cx_clear(MO_TS_DMACNTRL, 0x11);
 334                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 335         }
 336
 337         /* risc1 y */
 338         if (status & 0x01) {
 339                 dprintk( 1, "wake up\n" );
 340                 spin_lock(&dev->slock);
 341                 count = cx_read(MO_TS_GPCNT);
 342                 cx88_wakeup(dev->core, &dev->mpegq, count);
 343                 spin_unlock(&dev->slock);
 344         }
 345
 346         /* other general errors */
 347         if (status & 0x1f0100) {
 348                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 349                 spin_lock(&dev->slock);
 350                 cx8802_stop_dma(dev);
 351                 spin_unlock(&dev->slock);
 352         }
 353 }
 354
 355 #define MAX_IRQ_LOOP 10
 356
 357 static irqreturn_t cx8802_irq(int irq, void *dev_id)
 358 {
 359         struct cx8802_dev *dev = dev_id;
 360         struct cx88_core *core = dev->core;
 361         u32 status;
 362         int loop, handled = 0;
 363
 364         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 365                 status = cx_read(MO_PCI_INTSTAT) &
 366                         (core->pci_irqmask | PCI_INT_TSINT);
 367                 if (0 == status)
 368                         goto out;
 369                 dprintk( 1, "cx8802_irq\n" );
 370                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 371                 dprintk( 1, "    status: %d\n", status );
 372                 handled = 1;
 373                 cx_write(MO_PCI_INTSTAT, status);
 374
 375                 if (status & core->pci_irqmask)
 376                         cx88_core_irq(core,status);
 377                 if (status & PCI_INT_TSINT)
 378                         cx8802_mpeg_irq(dev);
 379         }
 380         if (MAX_IRQ_LOOP == loop) {
 381                 dprintk( 0, "clearing mask\n" );
 382                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 383                        core->name);
 384                 cx_write(MO_PCI_INTMSK,0);
 385         }
 386
 387  out:
 388         return IRQ_RETVAL(handled);
 389 }
 390
 391 static int cx8802_init_common(struct cx8802_dev *dev)
 392 {
 393         struct cx88_core *core = dev->core;
 394         int err;
 395
 396         /* pci init */
 397         if (pci_enable_device(dev->pci))
 398                 return -EIO;
 399         pci_set_master(dev->pci);
 400         if (!pci_dma_supported(dev->pci,DMA_BIT_MASK(32))) {
 401                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 402                 return -EIO;
 403         }
 404
 405         dev->pci_rev = dev->pci->revision;
 406         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 407         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 408                "latency: %d, mmio: 0x%llx\n", dev->core->name,
 409                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 410                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
 411
 412         /* initialize driver struct */
 413         spin_lock_init(&dev->slock);
 414
 415         /* init dma queue */
 416         INIT_LIST_HEAD(&dev->mpegq.active);
 417
 418         /* get irq */
 419         err = request_irq(dev->pci->irq, cx8802_irq,
 420                           IRQF_SHARED, dev->core->name, dev);
 421         if (err < 0) {
 422                 printk(KERN_ERR "%s: can't get IRQ %d\n",
 423                        dev->core->name, dev->pci->irq);
 424                 return err;
 425         }
 426         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 427
 428         /* everything worked */
 429         pci_set_drvdata(dev->pci,dev);
 430         return 0;
 431 }
 432
 433 static void cx8802_fini_common(struct cx8802_dev *dev)
 434 {
 435         dprintk( 2, "cx8802_fini_common\n" );
 436         cx8802_stop_dma(dev);
 437         pci_disable_device(dev->pci);
 438
 439         /* unregister stuff */
 440         free_irq(dev->pci->irq, dev);
 441 }
 442
 443 /* ----------------------------------------------------------- */
 444
 445 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 446 {
 447         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 448         struct cx88_core *core = dev->core;
 449         unsigned long flags;
 450
 451         /* stop mpeg dma */
 452         spin_lock_irqsave(&dev->slock, flags);
 453         if (!list_empty(&dev->mpegq.active)) {
 454                 dprintk( 2, "suspend\n" );
 455                 printk("%s: suspend mpeg\n", core->name);
 456                 cx8802_stop_dma(dev);
 457         }
 458         spin_unlock_irqrestore(&dev->slock, flags);
 459
 460         /* FIXME -- shutdown device */
 461         cx88_shutdown(dev->core);
 462
 463         pci_save_state(pci_dev);
 464         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 465                 pci_disable_device(pci_dev);
 466                 dev->state.disabled = 1;
 467         }
 468         return 0;
 469 }
 470
 471 static int cx8802_resume_common(struct pci_dev *pci_dev)
 472 {
 473         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 474         struct cx88_core *core = dev->core;
 475         unsigned long flags;
 476         int err;
 477
 478         if (dev->state.disabled) {
 479                 err=pci_enable_device(pci_dev);
 480                 if (err) {
 481                         printk(KERN_ERR "%s: can't enable device\n",
 482                                                dev->core->name);
 483                         return err;
 484                 }
 485                 dev->state.disabled = 0;
 486         }
 487         err=pci_set_power_state(pci_dev, PCI_D0);
 488         if (err) {
 489                 printk(KERN_ERR "%s: can't enable device\n",
 490                                                dev->core->name);
 491                 pci_disable_device(pci_dev);
 492                 dev->state.disabled = 1;
 493
 494                 return err;
 495         }
 496         pci_restore_state(pci_dev);
 497
 498         /* FIXME: re-initialize hardware */
 499         cx88_reset(dev->core);
 500
 501         /* restart video+vbi capture */
 502         spin_lock_irqsave(&dev->slock, flags);
 503         if (!list_empty(&dev->mpegq.active)) {
 504                 printk("%s: resume mpeg\n", core->name);
 505                 cx8802_restart_queue(dev,&dev->mpegq);
 506         }
 507         spin_unlock_irqrestore(&dev->slock, flags);
 508
 509         return 0;
 510 }
 511
 512 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
 513 {
 514         struct cx8802_driver *d;
 515
 516         list_for_each_entry(d, &dev->drvlist, drvlist)
 517                 if (d->type_id == btype)
 518                         return d;
 519
 520         return NULL;
 521 }
 522
 523 /* Driver asked for hardware access. */
 524 static int cx8802_request_acquire(struct cx8802_driver *drv)
 525 {
 526         struct cx88_core *core = drv->core;
 527         unsigned int    i;
 528
 529         /* Fail a request for hardware if the device is busy. */
 530         if (core->active_type_id != CX88_BOARD_NONE &&
 531             core->active_type_id != drv->type_id)
 532                 return -EBUSY;
 533
 534         if (drv->type_id == CX88_MPEG_DVB) {
 535                 /* When switching to DVB, always set the input to the tuner */
 536                 core->last_analog_input = core->input;
 537                 core->input = 0;
 538                 for (i = 0;
 539                      i < (sizeof(core->board.input) / sizeof(struct cx88_input));
 540                      i++) {
 541                         if (core->board.input[i].type == CX88_VMUX_DVB) {
 542                                 core->input = i;
 543                                 break;
 544                         }
 545                 }
 546         }
 547
 548         if (drv->advise_acquire)
 549         {
 550                 core->active_ref++;
 551                 if (core->active_type_id == CX88_BOARD_NONE) {
 552                         core->active_type_id = drv->type_id;
 553                         drv->advise_acquire(drv);
 554                 }
 555
 556                 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 557         }
 558
 559         return 0;
 560 }
 561
 562 /* Driver asked to release hardware. */
 563 static int cx8802_request_release(struct cx8802_driver *drv)
 564 {
 565         struct cx88_core *core = drv->core;
 566
 567         if (drv->advise_release && --core->active_ref == 0)
 568         {
 569                 if (drv->type_id == CX88_MPEG_DVB) {
 570                         /* If the DVB driver is releasing, reset the input
 571                            state to the last configured analog input */
 572                         core->input = core->last_analog_input;
 573                 }
 574
 575                 drv->advise_release(drv);
 576                 core->active_type_id = CX88_BOARD_NONE;
 577                 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 578         }
 579
 580         return 0;
 581 }
 582
 583 static int cx8802_check_driver(struct cx8802_driver *drv)
 584 {
 585         if (drv == NULL)
 586                 return -ENODEV;
 587
 588         if ((drv->type_id != CX88_MPEG_DVB) &&
 589                 (drv->type_id != CX88_MPEG_BLACKBIRD))
 590                 return -EINVAL;
 591
 592         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
 593                 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
 594                 return -EINVAL;
 595
 596         if ((drv->probe == NULL) ||
 597                 (drv->remove == NULL) ||
 598                 (drv->advise_acquire == NULL) ||
 599                 (drv->advise_release == NULL))
 600                 return -EINVAL;
 601
 602         return 0;
 603 }
 604
 605 int cx8802_register_driver(struct cx8802_driver *drv)
 606 {
 607         struct cx8802_dev *dev;
 608         struct cx8802_driver *driver;
 609         int err, i = 0;
 610
 611         printk(KERN_INFO
 612                "cx88/2: registering cx8802 driver, type: %s access: %s\n",
 613                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 614                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
 615
 616         if ((err = cx8802_check_driver(drv)) != 0) {
 617                 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
 618                 return err;
 619         }
 620
 621         mutex_lock(&cx8802_mutex);
 622
 623         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 624                 printk(KERN_INFO
 625                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 626                        dev->core->name, dev->pci->subsystem_vendor,
 627                        dev->pci->subsystem_device, dev->core->board.name,
 628                        dev->core->boardnr);
 629
 630                 /* Bring up a new struct for each driver instance */
 631                 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
 632                 if (driver == NULL) {
 633                         err = -ENOMEM;
 634                         goto out;
 635                 }
 636
 637                 /* Snapshot of the driver registration data */
 638                 drv->core = dev->core;
 639                 drv->suspend = cx8802_suspend_common;
 640                 drv->resume = cx8802_resume_common;
 641                 drv->request_acquire = cx8802_request_acquire;
 642                 drv->request_release = cx8802_request_release;
 643                 memcpy(driver, drv, sizeof(*driver));
 644
 645                 mutex_lock(&drv->core->lock);
 646                 err = drv->probe(driver);
 647                 if (err == 0) {
 648                         i++;
 649                         list_add_tail(&driver->drvlist, &dev->drvlist);
 650                 } else {
 651                         printk(KERN_ERR
 652                                "%s/2: cx8802 probe failed, err = %d\n",
 653                                dev->core->name, err);
 654                 }
 655                 mutex_unlock(&drv->core->lock);
 656         }
 657
 658         err = i ? 0 : -ENODEV;
 659 out:
 660         mutex_unlock(&cx8802_mutex);
 661         return err;
 662 }
 663
 664 int cx8802_unregister_driver(struct cx8802_driver *drv)
 665 {
 666         struct cx8802_dev *dev;
 667         struct cx8802_driver *d, *dtmp;
 668         int err = 0;
 669
 670         printk(KERN_INFO
 671                "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
 672                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 673                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
 674
 675         mutex_lock(&cx8802_mutex);
 676
 677         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 678                 printk(KERN_INFO
 679                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 680                        dev->core->name, dev->pci->subsystem_vendor,
 681                        dev->pci->subsystem_device, dev->core->board.name,
 682                        dev->core->boardnr);
 683
 684                 mutex_lock(&dev->core->lock);
 685
 686                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
 687                         /* only unregister the correct driver type */
 688                         if (d->type_id != drv->type_id)
 689                                 continue;
 690
 691                         err = d->remove(d);
 692                         if (err == 0) {
 693                                 list_del(&d->drvlist);
 694                                 kfree(d);
 695                         } else
 696                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
 697                                        "failed (%d)\n", dev->core->name, err);
 698                 }
 699
 700                 mutex_unlock(&dev->core->lock);
 701         }
 702
 703         mutex_unlock(&cx8802_mutex);
 704
 705         return err;
 706 }
 707
 708 /* ----------------------------------------------------------- */
 709 static int cx8802_probe(struct pci_dev *pci_dev,
 710                         const struct pci_device_id *pci_id)
 711 {
 712         struct cx8802_dev *dev;
 713         struct cx88_core  *core;
 714         int err;
 715
 716         /* general setup */
 717         core = cx88_core_get(pci_dev);
 718         if (NULL == core)
 719                 return -EINVAL;
 720
 721         printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
 722
 723         err = -ENODEV;
 724         if (!core->board.mpeg)
 725                 goto fail_core;
 726
 727         err = -ENOMEM;
 728         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
 729         if (NULL == dev)
 730                 goto fail_core;
 731         dev->pci = pci_dev;
 732         dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
 733         if (IS_ERR(dev->alloc_ctx)) {
 734                 err = PTR_ERR(dev->alloc_ctx);
 735                 goto fail_dev;
 736         }
 737         dev->core = core;
 738
 739         /* Maintain a reference so cx88-video can query the 8802 device. */
 740         core->dvbdev = dev;
 741
 742         err = cx8802_init_common(dev);
 743         if (err != 0)
 744                 goto fail_free;
 745
 746         INIT_LIST_HEAD(&dev->drvlist);
 747         mutex_lock(&cx8802_mutex);
 748         list_add_tail(&dev->devlist,&cx8802_devlist);
 749         mutex_unlock(&cx8802_mutex);
 750
 751         /* now autoload cx88-dvb or cx88-blackbird */
 752         request_modules(dev);
 753         return 0;
 754
 755  fail_free:
 756         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 757  fail_dev:
 758         kfree(dev);
 759  fail_core:
 760         core->dvbdev = NULL;
 761         cx88_core_put(core,pci_dev);
 762         return err;
 763 }
 764
 765 static void cx8802_remove(struct pci_dev *pci_dev)
 766 {
 767         struct cx8802_dev *dev;
 768
 769         dev = pci_get_drvdata(pci_dev);
 770
 771         dprintk( 1, "%s\n", __func__);
 772
 773         flush_request_modules(dev);
 774
 775         mutex_lock(&dev->core->lock);
 776
 777         if (!list_empty(&dev->drvlist)) {
 778                 struct cx8802_driver *drv, *tmp;
 779                 int err;
 780
 781                 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
 782                        "while cx8802 sub-drivers still loaded?!\n",
 783                        dev->core->name);
 784
 785                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
 786                         err = drv->remove(drv);
 787                         if (err == 0) {
 788                                 list_del(&drv->drvlist);
 789                         } else
 790                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
 791                                        "failed (%d)\n", dev->core->name, err);
 792                         kfree(drv);
 793                 }
 794         }
 795
 796         mutex_unlock(&dev->core->lock);
 797
 798         /* Destroy any 8802 reference. */
 799         dev->core->dvbdev = NULL;
 800
 801         /* common */
 802         cx8802_fini_common(dev);
 803         cx88_core_put(dev->core,dev->pci);
 804         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 805         kfree(dev);
 806 }
 807
 808 static const struct pci_device_id cx8802_pci_tbl[] = {
 809         {
 810                 .vendor       = 0x14f1,
 811                 .device       = 0x8802,
 812                 .subvendor    = PCI_ANY_ID,
 813                 .subdevice    = PCI_ANY_ID,
 814         },{
 815                 /* --- end of list --- */
 816         }
 817 };
 818 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
 819
 820 static struct pci_driver cx8802_pci_driver = {
 821         .name     = "cx88-mpeg driver manager",
 822         .id_table = cx8802_pci_tbl,
 823         .probe    = cx8802_probe,
 824         .remove   = cx8802_remove,
 825 };
 826
 827 module_pci_driver(cx8802_pci_driver);
 828
 829 EXPORT_SYMBOL(cx8802_buf_prepare);
 830 EXPORT_SYMBOL(cx8802_buf_queue);
 831 EXPORT_SYMBOL(cx8802_cancel_buffers);
 832 EXPORT_SYMBOL(cx8802_start_dma);
 833
 834 EXPORT_SYMBOL(cx8802_register_driver);
 835 EXPORT_SYMBOL(cx8802_unregister_driver);
 836 EXPORT_SYMBOL(cx8802_get_driver);