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 = 0;
 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.vb2_buf.index);
 218         cx8802_start_dma(dev, q, buf);
 219         return 0;
 220 }
 221
 222 /* ------------------------------------------------------------------ */
 223
 224 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
 225                         struct cx88_buffer *buf)
 226 {
 227         int size = dev->ts_packet_size * dev->ts_packet_count;
 228         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
 229         struct cx88_riscmem *risc = &buf->risc;
 230         int rc;
 231
 232         if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
 233                 return -EINVAL;
 234         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
 235
 236         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
 237                              dev->ts_packet_size, dev->ts_packet_count, 0);
 238         if (rc) {
 239                 if (risc->cpu)
 240                         pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
 241                 memset(risc, 0, sizeof(*risc));
 242                 return rc;
 243         }
 244         return 0;
 245 }
 246
 247 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 248 {
 249         struct cx88_buffer    *prev;
 250         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
 251
 252         dprintk( 1, "cx8802_buf_queue\n" );
 253         /* add jump to start */
 254         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
 255         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 256         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
 257
 258         if (list_empty(&cx88q->active)) {
 259                 dprintk( 1, "queue is empty - first active\n" );
 260                 list_add_tail(&buf->list, &cx88q->active);
 261                 dprintk(1,"[%p/%d] %s - first active\n",
 262                         buf, buf->vb.vb2_buf.index, __func__);
 263
 264         } else {
 265                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 266                 dprintk( 1, "queue is not empty - append to active\n" );
 267                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
 268                 list_add_tail(&buf->list, &cx88q->active);
 269                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 270                 dprintk( 1, "[%p/%d] %s - append to active\n",
 271                         buf, buf->vb.vb2_buf.index, __func__);
 272         }
 273 }
 274
 275 /* ----------------------------------------------------------- */
 276
 277 static void do_cancel_buffers(struct cx8802_dev *dev)
 278 {
 279         struct cx88_dmaqueue *q = &dev->mpegq;
 280         struct cx88_buffer *buf;
 281         unsigned long flags;
 282
 283         spin_lock_irqsave(&dev->slock,flags);
 284         while (!list_empty(&q->active)) {
 285                 buf = list_entry(q->active.next, struct cx88_buffer, list);
 286                 list_del(&buf->list);
 287                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 288         }
 289         spin_unlock_irqrestore(&dev->slock,flags);
 290 }
 291
 292 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 293 {
 294         dprintk( 1, "cx8802_cancel_buffers" );
 295         cx8802_stop_dma(dev);
 296         do_cancel_buffers(dev);
 297 }
 298
 299 static const char * cx88_mpeg_irqs[32] = {
 300         "ts_risci1", NULL, NULL, NULL,
 301         "ts_risci2", NULL, NULL, NULL,
 302         "ts_oflow",  NULL, NULL, NULL,
 303         "ts_sync",   NULL, NULL, NULL,
 304         "opc_err", "par_err", "rip_err", "pci_abort",
 305         "ts_err?",
 306 };
 307
 308 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 309 {
 310         struct cx88_core *core = dev->core;
 311         u32 status, mask, count;
 312
 313         dprintk( 1, "cx8802_mpeg_irq\n" );
 314         status = cx_read(MO_TS_INTSTAT);
 315         mask   = cx_read(MO_TS_INTMSK);
 316         if (0 == (status & mask))
 317                 return;
 318
 319         cx_write(MO_TS_INTSTAT, status);
 320
 321         if (debug || (status & mask & ~0xff))
 322                 cx88_print_irqbits(core->name, "irq mpeg ",
 323                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
 324                                    status, mask);
 325
 326         /* risc op code error */
 327         if (status & (1 << 16)) {
 328                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 329                 cx_clear(MO_TS_DMACNTRL, 0x11);
 330                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 331         }
 332
 333         /* risc1 y */
 334         if (status & 0x01) {
 335                 dprintk( 1, "wake up\n" );
 336                 spin_lock(&dev->slock);
 337                 count = cx_read(MO_TS_GPCNT);
 338                 cx88_wakeup(dev->core, &dev->mpegq, count);
 339                 spin_unlock(&dev->slock);
 340         }
 341
 342         /* other general errors */
 343         if (status & 0x1f0100) {
 344                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 345                 spin_lock(&dev->slock);
 346                 cx8802_stop_dma(dev);
 347                 spin_unlock(&dev->slock);
 348         }
 349 }
 350
 351 #define MAX_IRQ_LOOP 10
 352
 353 static irqreturn_t cx8802_irq(int irq, void *dev_id)
 354 {
 355         struct cx8802_dev *dev = dev_id;
 356         struct cx88_core *core = dev->core;
 357         u32 status;
 358         int loop, handled = 0;
 359
 360         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 361                 status = cx_read(MO_PCI_INTSTAT) &
 362                         (core->pci_irqmask | PCI_INT_TSINT);
 363                 if (0 == status)
 364                         goto out;
 365                 dprintk( 1, "cx8802_irq\n" );
 366                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 367                 dprintk( 1, "    status: %d\n", status );
 368                 handled = 1;
 369                 cx_write(MO_PCI_INTSTAT, status);
 370
 371                 if (status & core->pci_irqmask)
 372                         cx88_core_irq(core,status);
 373                 if (status & PCI_INT_TSINT)
 374                         cx8802_mpeg_irq(dev);
 375         }
 376         if (MAX_IRQ_LOOP == loop) {
 377                 dprintk( 0, "clearing mask\n" );
 378                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 379                        core->name);
 380                 cx_write(MO_PCI_INTMSK,0);
 381         }
 382
 383  out:
 384         return IRQ_RETVAL(handled);
 385 }
 386
 387 static int cx8802_init_common(struct cx8802_dev *dev)
 388 {
 389         struct cx88_core *core = dev->core;
 390         int err;
 391
 392         /* pci init */
 393         if (pci_enable_device(dev->pci))
 394                 return -EIO;
 395         pci_set_master(dev->pci);
 396         err = pci_set_dma_mask(dev->pci,DMA_BIT_MASK(32));
 397         if (err) {
 398                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 399                 return -EIO;
 400         }
 401
 402         dev->pci_rev = dev->pci->revision;
 403         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 404         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 405                "latency: %d, mmio: 0x%llx\n", dev->core->name,
 406                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 407                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
 408
 409         /* initialize driver struct */
 410         spin_lock_init(&dev->slock);
 411
 412         /* init dma queue */
 413         INIT_LIST_HEAD(&dev->mpegq.active);
 414
 415         /* get irq */
 416         err = request_irq(dev->pci->irq, cx8802_irq,
 417                           IRQF_SHARED, dev->core->name, dev);
 418         if (err < 0) {
 419                 printk(KERN_ERR "%s: can't get IRQ %d\n",
 420                        dev->core->name, dev->pci->irq);
 421                 return err;
 422         }
 423         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 424
 425         /* everything worked */
 426         pci_set_drvdata(dev->pci,dev);
 427         return 0;
 428 }
 429
 430 static void cx8802_fini_common(struct cx8802_dev *dev)
 431 {
 432         dprintk( 2, "cx8802_fini_common\n" );
 433         cx8802_stop_dma(dev);
 434         pci_disable_device(dev->pci);
 435
 436         /* unregister stuff */
 437         free_irq(dev->pci->irq, dev);
 438 }
 439
 440 /* ----------------------------------------------------------- */
 441
 442 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 443 {
 444         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 445         struct cx88_core *core = dev->core;
 446         unsigned long flags;
 447
 448         /* stop mpeg dma */
 449         spin_lock_irqsave(&dev->slock, flags);
 450         if (!list_empty(&dev->mpegq.active)) {
 451                 dprintk( 2, "suspend\n" );
 452                 printk("%s: suspend mpeg\n", core->name);
 453                 cx8802_stop_dma(dev);
 454         }
 455         spin_unlock_irqrestore(&dev->slock, flags);
 456
 457         /* FIXME -- shutdown device */
 458         cx88_shutdown(dev->core);
 459
 460         pci_save_state(pci_dev);
 461         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 462                 pci_disable_device(pci_dev);
 463                 dev->state.disabled = 1;
 464         }
 465         return 0;
 466 }
 467
 468 static int cx8802_resume_common(struct pci_dev *pci_dev)
 469 {
 470         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 471         struct cx88_core *core = dev->core;
 472         unsigned long flags;
 473         int err;
 474
 475         if (dev->state.disabled) {
 476                 err=pci_enable_device(pci_dev);
 477                 if (err) {
 478                         printk(KERN_ERR "%s: can't enable device\n",
 479                                                dev->core->name);
 480                         return err;
 481                 }
 482                 dev->state.disabled = 0;
 483         }
 484         err=pci_set_power_state(pci_dev, PCI_D0);
 485         if (err) {
 486                 printk(KERN_ERR "%s: can't enable device\n",
 487                                                dev->core->name);
 488                 pci_disable_device(pci_dev);
 489                 dev->state.disabled = 1;
 490
 491                 return err;
 492         }
 493         pci_restore_state(pci_dev);
 494
 495         /* FIXME: re-initialize hardware */
 496         cx88_reset(dev->core);
 497
 498         /* restart video+vbi capture */
 499         spin_lock_irqsave(&dev->slock, flags);
 500         if (!list_empty(&dev->mpegq.active)) {
 501                 printk("%s: resume mpeg\n", core->name);
 502                 cx8802_restart_queue(dev,&dev->mpegq);
 503         }
 504         spin_unlock_irqrestore(&dev->slock, flags);
 505
 506         return 0;
 507 }
 508
 509 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
 510 {
 511         struct cx8802_driver *d;
 512
 513         list_for_each_entry(d, &dev->drvlist, drvlist)
 514                 if (d->type_id == btype)
 515                         return d;
 516
 517         return NULL;
 518 }
 519
 520 /* Driver asked for hardware access. */
 521 static int cx8802_request_acquire(struct cx8802_driver *drv)
 522 {
 523         struct cx88_core *core = drv->core;
 524         unsigned int    i;
 525
 526         /* Fail a request for hardware if the device is busy. */
 527         if (core->active_type_id != CX88_BOARD_NONE &&
 528             core->active_type_id != drv->type_id)
 529                 return -EBUSY;
 530
 531         if (drv->type_id == CX88_MPEG_DVB) {
 532                 /* When switching to DVB, always set the input to the tuner */
 533                 core->last_analog_input = core->input;
 534                 core->input = 0;
 535                 for (i = 0;
 536                      i < (sizeof(core->board.input) / sizeof(struct cx88_input));
 537                      i++) {
 538                         if (core->board.input[i].type == CX88_VMUX_DVB) {
 539                                 core->input = i;
 540                                 break;
 541                         }
 542                 }
 543         }
 544
 545         if (drv->advise_acquire)
 546         {
 547                 core->active_ref++;
 548                 if (core->active_type_id == CX88_BOARD_NONE) {
 549                         core->active_type_id = drv->type_id;
 550                         drv->advise_acquire(drv);
 551                 }
 552
 553                 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 554         }
 555
 556         return 0;
 557 }
 558
 559 /* Driver asked to release hardware. */
 560 static int cx8802_request_release(struct cx8802_driver *drv)
 561 {
 562         struct cx88_core *core = drv->core;
 563
 564         if (drv->advise_release && --core->active_ref == 0)
 565         {
 566                 if (drv->type_id == CX88_MPEG_DVB) {
 567                         /* If the DVB driver is releasing, reset the input
 568                            state to the last configured analog input */
 569                         core->input = core->last_analog_input;
 570                 }
 571
 572                 drv->advise_release(drv);
 573                 core->active_type_id = CX88_BOARD_NONE;
 574                 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int cx8802_check_driver(struct cx8802_driver *drv)
 581 {
 582         if (drv == NULL)
 583                 return -ENODEV;
 584
 585         if ((drv->type_id != CX88_MPEG_DVB) &&
 586                 (drv->type_id != CX88_MPEG_BLACKBIRD))
 587                 return -EINVAL;
 588
 589         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
 590                 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
 591                 return -EINVAL;
 592
 593         if ((drv->probe == NULL) ||
 594                 (drv->remove == NULL) ||
 595                 (drv->advise_acquire == NULL) ||
 596                 (drv->advise_release == NULL))
 597                 return -EINVAL;
 598
 599         return 0;
 600 }
 601
 602 int cx8802_register_driver(struct cx8802_driver *drv)
 603 {
 604         struct cx8802_dev *dev;
 605         struct cx8802_driver *driver;
 606         int err, i = 0;
 607
 608         printk(KERN_INFO
 609                "cx88/2: registering cx8802 driver, type: %s access: %s\n",
 610                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 611                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
 612
 613         if ((err = cx8802_check_driver(drv)) != 0) {
 614                 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
 615                 return err;
 616         }
 617
 618         mutex_lock(&cx8802_mutex);
 619
 620         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 621                 printk(KERN_INFO
 622                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 623                        dev->core->name, dev->pci->subsystem_vendor,
 624                        dev->pci->subsystem_device, dev->core->board.name,
 625                        dev->core->boardnr);
 626
 627                 /* Bring up a new struct for each driver instance */
 628                 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
 629                 if (driver == NULL) {
 630                         err = -ENOMEM;
 631                         goto out;
 632                 }
 633
 634                 /* Snapshot of the driver registration data */
 635                 drv->core = dev->core;
 636                 drv->suspend = cx8802_suspend_common;
 637                 drv->resume = cx8802_resume_common;
 638                 drv->request_acquire = cx8802_request_acquire;
 639                 drv->request_release = cx8802_request_release;
 640                 memcpy(driver, drv, sizeof(*driver));
 641
 642                 mutex_lock(&drv->core->lock);
 643                 err = drv->probe(driver);
 644                 if (err == 0) {
 645                         i++;
 646                         list_add_tail(&driver->drvlist, &dev->drvlist);
 647                 } else {
 648                         printk(KERN_ERR
 649                                "%s/2: cx8802 probe failed, err = %d\n",
 650                                dev->core->name, err);
 651                 }
 652                 mutex_unlock(&drv->core->lock);
 653         }
 654
 655         err = i ? 0 : -ENODEV;
 656 out:
 657         mutex_unlock(&cx8802_mutex);
 658         return err;
 659 }
 660
 661 int cx8802_unregister_driver(struct cx8802_driver *drv)
 662 {
 663         struct cx8802_dev *dev;
 664         struct cx8802_driver *d, *dtmp;
 665         int err = 0;
 666
 667         printk(KERN_INFO
 668                "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
 669                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 670                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
 671
 672         mutex_lock(&cx8802_mutex);
 673
 674         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 675                 printk(KERN_INFO
 676                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 677                        dev->core->name, dev->pci->subsystem_vendor,
 678                        dev->pci->subsystem_device, dev->core->board.name,
 679                        dev->core->boardnr);
 680
 681                 mutex_lock(&dev->core->lock);
 682
 683                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
 684                         /* only unregister the correct driver type */
 685                         if (d->type_id != drv->type_id)
 686                                 continue;
 687
 688                         err = d->remove(d);
 689                         if (err == 0) {
 690                                 list_del(&d->drvlist);
 691                                 kfree(d);
 692                         } else
 693                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
 694                                        "failed (%d)\n", dev->core->name, err);
 695                 }
 696
 697                 mutex_unlock(&dev->core->lock);
 698         }
 699
 700         mutex_unlock(&cx8802_mutex);
 701
 702         return err;
 703 }
 704
 705 /* ----------------------------------------------------------- */
 706 static int cx8802_probe(struct pci_dev *pci_dev,
 707                         const struct pci_device_id *pci_id)
 708 {
 709         struct cx8802_dev *dev;
 710         struct cx88_core  *core;
 711         int err;
 712
 713         /* general setup */
 714         core = cx88_core_get(pci_dev);
 715         if (NULL == core)
 716                 return -EINVAL;
 717
 718         printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
 719
 720         err = -ENODEV;
 721         if (!core->board.mpeg)
 722                 goto fail_core;
 723
 724         err = -ENOMEM;
 725         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
 726         if (NULL == dev)
 727                 goto fail_core;
 728         dev->pci = pci_dev;
 729         dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
 730         if (IS_ERR(dev->alloc_ctx)) {
 731                 err = PTR_ERR(dev->alloc_ctx);
 732                 goto fail_dev;
 733         }
 734         dev->core = core;
 735
 736         /* Maintain a reference so cx88-video can query the 8802 device. */
 737         core->dvbdev = dev;
 738
 739         err = cx8802_init_common(dev);
 740         if (err != 0)
 741                 goto fail_free;
 742
 743         INIT_LIST_HEAD(&dev->drvlist);
 744         mutex_lock(&cx8802_mutex);
 745         list_add_tail(&dev->devlist,&cx8802_devlist);
 746         mutex_unlock(&cx8802_mutex);
 747
 748         /* now autoload cx88-dvb or cx88-blackbird */
 749         request_modules(dev);
 750         return 0;
 751
 752  fail_free:
 753         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 754  fail_dev:
 755         kfree(dev);
 756  fail_core:
 757         core->dvbdev = NULL;
 758         cx88_core_put(core,pci_dev);
 759         return err;
 760 }
 761
 762 static void cx8802_remove(struct pci_dev *pci_dev)
 763 {
 764         struct cx8802_dev *dev;
 765
 766         dev = pci_get_drvdata(pci_dev);
 767
 768         dprintk( 1, "%s\n", __func__);
 769
 770         flush_request_modules(dev);
 771
 772         mutex_lock(&dev->core->lock);
 773
 774         if (!list_empty(&dev->drvlist)) {
 775                 struct cx8802_driver *drv, *tmp;
 776                 int err;
 777
 778                 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
 779                        "while cx8802 sub-drivers still loaded?!\n",
 780                        dev->core->name);
 781
 782                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
 783                         err = drv->remove(drv);
 784                         if (err == 0) {
 785                                 list_del(&drv->drvlist);
 786                         } else
 787                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
 788                                        "failed (%d)\n", dev->core->name, err);
 789                         kfree(drv);
 790                 }
 791         }
 792
 793         mutex_unlock(&dev->core->lock);
 794
 795         /* Destroy any 8802 reference. */
 796         dev->core->dvbdev = NULL;
 797
 798         /* common */
 799         cx8802_fini_common(dev);
 800         cx88_core_put(dev->core,dev->pci);
 801         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 802         kfree(dev);
 803 }
 804
 805 static const struct pci_device_id cx8802_pci_tbl[] = {
 806         {
 807                 .vendor       = 0x14f1,
 808                 .device       = 0x8802,
 809                 .subvendor    = PCI_ANY_ID,
 810                 .subdevice    = PCI_ANY_ID,
 811         },{
 812                 /* --- end of list --- */
 813         }
 814 };
 815 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
 816
 817 static struct pci_driver cx8802_pci_driver = {
 818         .name     = "cx88-mpeg driver manager",
 819         .id_table = cx8802_pci_tbl,
 820         .probe    = cx8802_probe,
 821         .remove   = cx8802_remove,
 822 };
 823
 824 module_pci_driver(cx8802_pci_driver);
 825
 826 EXPORT_SYMBOL(cx8802_buf_prepare);
 827 EXPORT_SYMBOL(cx8802_buf_queue);
 828 EXPORT_SYMBOL(cx8802_cancel_buffers);
 829 EXPORT_SYMBOL(cx8802_start_dma);
 830
 831 EXPORT_SYMBOL(cx8802_register_driver);
 832 EXPORT_SYMBOL(cx8802_unregister_driver);
 833 EXPORT_SYMBOL(cx8802_get_driver);