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
  21 #include "cx88.h"
  22
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/init.h>
  26 #include <linux/device.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/delay.h>
  30
  31 /* ------------------------------------------------------------------ */
  32
  33 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
  34 MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
  35 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
  36 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  37 MODULE_LICENSE("GPL");
  38 MODULE_VERSION(CX88_VERSION);
  39
  40 static unsigned int debug;
  41 module_param(debug, int, 0644);
  42 MODULE_PARM_DESC(debug, "enable debug messages [mpeg]");
  43
  44 #define dprintk(level, fmt, arg...) do {                                \
  45         if (debug + 1 > level)                                          \
  46                 printk(KERN_DEBUG pr_fmt("%s: mpeg:" fmt),              \
  47                         __func__, ##arg);                               \
  48 } while (0)
  49
  50 #if defined(CONFIG_MODULES) && defined(MODULE)
  51 static void request_module_async(struct work_struct *work)
  52 {
  53         struct cx8802_dev *dev = container_of(work, struct cx8802_dev,
  54                                               request_module_wk);
  55
  56         if (dev->core->board.mpeg & CX88_MPEG_DVB)
  57                 request_module("cx88-dvb");
  58         if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
  59                 request_module("cx88-blackbird");
  60 }
  61
  62 static void request_modules(struct cx8802_dev *dev)
  63 {
  64         INIT_WORK(&dev->request_module_wk, request_module_async);
  65         schedule_work(&dev->request_module_wk);
  66 }
  67
  68 static void flush_request_modules(struct cx8802_dev *dev)
  69 {
  70         flush_work(&dev->request_module_wk);
  71 }
  72 #else
  73 #define request_modules(dev)
  74 #define flush_request_modules(dev)
  75 #endif /* CONFIG_MODULES */
  76
  77 static LIST_HEAD(cx8802_devlist);
  78 static DEFINE_MUTEX(cx8802_mutex);
  79 /* ------------------------------------------------------------------ */
  80
  81 int cx8802_start_dma(struct cx8802_dev    *dev,
  82                      struct cx88_dmaqueue *q,
  83                      struct cx88_buffer   *buf)
  84 {
  85         struct cx88_core *core = dev->core;
  86
  87         dprintk(1, "w: %d, h: %d, f: %d\n",
  88                 core->width, core->height, core->field);
  89
  90         /* setup fifo + format */
  91         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
  92                                 dev->ts_packet_size, buf->risc.dma);
  93
  94         /* write TS length to chip */
  95         cx_write(MO_TS_LNGTH, dev->ts_packet_size);
  96
  97         /*
  98          * FIXME: this needs a review.
  99          * also: move to cx88-blackbird + cx88-dvb source files?
 100          */
 101
 102         dprintk(1, "core->active_type_id = 0x%08x\n", core->active_type_id);
 103
 104         if ((core->active_type_id == CX88_MPEG_DVB) &&
 105             (core->board.mpeg & CX88_MPEG_DVB)) {
 106                 dprintk(1, "cx8802_start_dma doing .dvb\n");
 107                 /* negedge driven & software reset */
 108                 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
 109                 udelay(100);
 110                 cx_write(MO_PINMUX_IO, 0x00);
 111                 cx_write(TS_HW_SOP_CNTRL, 0x47 << 16 | 188 << 4 | 0x01);
 112                 switch (core->boardnr) {
 113                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
 114                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
 115                 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
 116                 case CX88_BOARD_PCHDTV_HD5500:
 117                         cx_write(TS_SOP_STAT, 1 << 13);
 118                         break;
 119                 case CX88_BOARD_SAMSUNG_SMT_7020:
 120                         cx_write(TS_SOP_STAT, 0x00);
 121                         break;
 122                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 123                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 124                         /* Enable MPEG parallel IO and video signal pins */
 125                         cx_write(MO_PINMUX_IO, 0x88);
 126                         udelay(100);
 127                         break;
 128                 case CX88_BOARD_HAUPPAUGE_HVR1300:
 129                         /* Enable MPEG parallel IO and video signal pins */
 130                         cx_write(MO_PINMUX_IO, 0x88);
 131                         cx_write(TS_SOP_STAT, 0);
 132                         cx_write(TS_VALERR_CNTRL, 0);
 133                         break;
 134                 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 135                         /* Enable MPEG parallel IO and video signal pins */
 136                         cx_write(MO_PINMUX_IO, 0x88);
 137                         cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
 138                         dev->ts_gen_cntrl = 5;
 139                         cx_write(TS_SOP_STAT, 0);
 140                         cx_write(TS_VALERR_CNTRL, 0);
 141                         udelay(100);
 142                         break;
 143                 default:
 144                         cx_write(TS_SOP_STAT, 0x00);
 145                         break;
 146                 }
 147                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
 148                 udelay(100);
 149         } else if ((core->active_type_id == CX88_MPEG_BLACKBIRD) &&
 150                 (core->board.mpeg & CX88_MPEG_BLACKBIRD)) {
 151                 dprintk(1, "cx8802_start_dma doing .blackbird\n");
 152                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
 153
 154                 /* punctured clock TS & posedge driven & software reset */
 155                 cx_write(TS_GEN_CNTRL, 0x46);
 156                 udelay(100);
 157
 158                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
 159                 cx_write(TS_VALERR_CNTRL, 0x2000);
 160
 161                 /* punctured clock TS & posedge driven */
 162                 cx_write(TS_GEN_CNTRL, 0x06);
 163                 udelay(100);
 164         } else {
 165                 pr_err("%s() Failed. Unsupported value in .mpeg (0x%08x)\n",
 166                        __func__, core->board.mpeg);
 167                 return -EINVAL;
 168         }
 169
 170         /* reset counter */
 171         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 172         q->count = 0;
 173
 174         /* enable irqs */
 175         dprintk(1, "setting the interrupt mask\n");
 176         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
 177         cx_set(MO_TS_INTMSK,  0x1f0011);
 178
 179         /* start dma */
 180         cx_set(MO_DEV_CNTRL2, (1 << 5));
 181         cx_set(MO_TS_DMACNTRL, 0x11);
 182         return 0;
 183 }
 184 EXPORT_SYMBOL(cx8802_start_dma);
 185
 186 static int cx8802_stop_dma(struct cx8802_dev *dev)
 187 {
 188         struct cx88_core *core = dev->core;
 189
 190         dprintk(1, "\n");
 191
 192         /* stop dma */
 193         cx_clear(MO_TS_DMACNTRL, 0x11);
 194
 195         /* disable irqs */
 196         cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
 197         cx_clear(MO_TS_INTMSK, 0x1f0011);
 198
 199         /* Reset the controller */
 200         cx_write(TS_GEN_CNTRL, 0xcd);
 201         return 0;
 202 }
 203
 204 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 205                                 struct cx88_dmaqueue *q)
 206 {
 207         struct cx88_buffer *buf;
 208
 209         dprintk(1, "\n");
 210         if (list_empty(&q->active))
 211                 return 0;
 212
 213         buf = list_entry(q->active.next, struct cx88_buffer, list);
 214         dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 215                 buf, buf->vb.vb2_buf.index);
 216         cx8802_start_dma(dev, q, buf);
 217         return 0;
 218 }
 219
 220 /* ------------------------------------------------------------------ */
 221
 222 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
 223                        struct cx88_buffer *buf)
 224 {
 225         int size = dev->ts_packet_size * dev->ts_packet_count;
 226         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
 227         struct cx88_riscmem *risc = &buf->risc;
 228         int rc;
 229
 230         if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
 231                 return -EINVAL;
 232         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
 233
 234         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
 235                                   dev->ts_packet_size, dev->ts_packet_count, 0);
 236         if (rc) {
 237                 if (risc->cpu)
 238                         pci_free_consistent(dev->pci, risc->size,
 239                                             risc->cpu, risc->dma);
 240                 memset(risc, 0, sizeof(*risc));
 241                 return rc;
 242         }
 243         return 0;
 244 }
 245 EXPORT_SYMBOL(cx8802_buf_prepare);
 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, "\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 EXPORT_SYMBOL(cx8802_buf_queue);
 275
 276 /* ----------------------------------------------------------- */
 277
 278 static void do_cancel_buffers(struct cx8802_dev *dev)
 279 {
 280         struct cx88_dmaqueue *q = &dev->mpegq;
 281         struct cx88_buffer *buf;
 282         unsigned long flags;
 283
 284         spin_lock_irqsave(&dev->slock, flags);
 285         while (!list_empty(&q->active)) {
 286                 buf = list_entry(q->active.next, struct cx88_buffer, list);
 287                 list_del(&buf->list);
 288                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 289         }
 290         spin_unlock_irqrestore(&dev->slock, flags);
 291 }
 292
 293 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 294 {
 295         dprintk(1, "\n");
 296         cx8802_stop_dma(dev);
 297         do_cancel_buffers(dev);
 298 }
 299 EXPORT_SYMBOL(cx8802_cancel_buffers);
 300
 301 static const char *cx88_mpeg_irqs[32] = {
 302         "ts_risci1", NULL, NULL, NULL,
 303         "ts_risci2", NULL, NULL, NULL,
 304         "ts_oflow",  NULL, NULL, NULL,
 305         "ts_sync",   NULL, NULL, NULL,
 306         "opc_err", "par_err", "rip_err", "pci_abort",
 307         "ts_err?",
 308 };
 309
 310 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 311 {
 312         struct cx88_core *core = dev->core;
 313         u32 status, mask, count;
 314
 315         dprintk(1, "\n");
 316         status = cx_read(MO_TS_INTSTAT);
 317         mask   = cx_read(MO_TS_INTMSK);
 318         if (0 == (status & mask))
 319                 return;
 320
 321         cx_write(MO_TS_INTSTAT, status);
 322
 323         if (debug || (status & mask & ~0xff))
 324                 cx88_print_irqbits("irq mpeg ",
 325                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
 326                                    status, mask);
 327
 328         /* risc op code error */
 329         if (status & (1 << 16)) {
 330                 pr_warn("mpeg risc op code error\n");
 331                 cx_clear(MO_TS_DMACNTRL, 0x11);
 332                 cx88_sram_channel_dump(dev->core,
 333                                        &cx88_sram_channels[SRAM_CH28]);
 334         }
 335
 336         /* risc1 y */
 337         if (status & 0x01) {
 338                 dprintk(1, "wake up\n");
 339                 spin_lock(&dev->slock);
 340                 count = cx_read(MO_TS_GPCNT);
 341                 cx88_wakeup(dev->core, &dev->mpegq, count);
 342                 spin_unlock(&dev->slock);
 343         }
 344
 345         /* other general errors */
 346         if (status & 0x1f0100) {
 347                 dprintk(0, "general errors: 0x%08x\n", status & 0x1f0100);
 348                 spin_lock(&dev->slock);
 349                 cx8802_stop_dma(dev);
 350                 spin_unlock(&dev->slock);
 351         }
 352 }
 353
 354 #define MAX_IRQ_LOOP 10
 355
 356 static irqreturn_t cx8802_irq(int irq, void *dev_id)
 357 {
 358         struct cx8802_dev *dev = dev_id;
 359         struct cx88_core *core = dev->core;
 360         u32 status;
 361         int loop, handled = 0;
 362
 363         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 364                 status = cx_read(MO_PCI_INTSTAT) &
 365                         (core->pci_irqmask | PCI_INT_TSINT);
 366                 if (status == 0)
 367                         goto out;
 368                 dprintk(1, "cx8802_irq\n");
 369                 dprintk(1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP);
 370                 dprintk(1, "    status: %d\n", status);
 371                 handled = 1;
 372                 cx_write(MO_PCI_INTSTAT, status);
 373
 374                 if (status & core->pci_irqmask)
 375                         cx88_core_irq(core, status);
 376                 if (status & PCI_INT_TSINT)
 377                         cx8802_mpeg_irq(dev);
 378         }
 379         if (loop == MAX_IRQ_LOOP) {
 380                 dprintk(0, "clearing mask\n");
 381                 pr_warn("irq loop -- clearing mask\n");
 382                 cx_write(MO_PCI_INTMSK, 0);
 383         }
 384
 385  out:
 386         return IRQ_RETVAL(handled);
 387 }
 388
 389 static int cx8802_init_common(struct cx8802_dev *dev)
 390 {
 391         struct cx88_core *core = dev->core;
 392         int err;
 393
 394         /* pci init */
 395         if (pci_enable_device(dev->pci))
 396                 return -EIO;
 397         pci_set_master(dev->pci);
 398         err = pci_set_dma_mask(dev->pci, DMA_BIT_MASK(32));
 399         if (err) {
 400                 pr_err("Oops: no 32bit PCI DMA ???\n");
 401                 return -EIO;
 402         }
 403
 404         dev->pci_rev = dev->pci->revision;
 405         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 406         pr_info("found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
 407                 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 408                 dev->pci_lat,
 409                 (unsigned long long)pci_resource_start(dev->pci, 0));
 410
 411         /* initialize driver struct */
 412         spin_lock_init(&dev->slock);
 413
 414         /* init dma queue */
 415         INIT_LIST_HEAD(&dev->mpegq.active);
 416
 417         /* get irq */
 418         err = request_irq(dev->pci->irq, cx8802_irq,
 419                           IRQF_SHARED, dev->core->name, dev);
 420         if (err < 0) {
 421                 pr_err("can't get IRQ %d\n", dev->pci->irq);
 422                 return err;
 423         }
 424         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 425
 426         /* everything worked */
 427         pci_set_drvdata(dev->pci, dev);
 428         return 0;
 429 }
 430
 431 static void cx8802_fini_common(struct cx8802_dev *dev)
 432 {
 433         dprintk(2, "\n");
 434         cx8802_stop_dma(dev);
 435         pci_disable_device(dev->pci);
 436
 437         /* unregister stuff */
 438         free_irq(dev->pci->irq, dev);
 439 }
 440
 441 /* ----------------------------------------------------------- */
 442
 443 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 444 {
 445         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 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                 pr_info("suspend mpeg\n");
 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 (pci_set_power_state(pci_dev,
 462                                 pci_choose_state(pci_dev, state)) != 0) {
 463                 pci_disable_device(pci_dev);
 464                 dev->state.disabled = 1;
 465         }
 466         return 0;
 467 }
 468
 469 static int cx8802_resume_common(struct pci_dev *pci_dev)
 470 {
 471         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 472         unsigned long flags;
 473         int err;
 474
 475         if (dev->state.disabled) {
 476                 err = pci_enable_device(pci_dev);
 477                 if (err) {
 478                         pr_err("can't enable device\n");
 479                         return err;
 480                 }
 481                 dev->state.disabled = 0;
 482         }
 483         err = pci_set_power_state(pci_dev, PCI_D0);
 484         if (err) {
 485                 pr_err("can't enable device\n");
 486                 pci_disable_device(pci_dev);
 487                 dev->state.disabled = 1;
 488
 489                 return err;
 490         }
 491         pci_restore_state(pci_dev);
 492
 493         /* FIXME: re-initialize hardware */
 494         cx88_reset(dev->core);
 495
 496         /* restart video+vbi capture */
 497         spin_lock_irqsave(&dev->slock, flags);
 498         if (!list_empty(&dev->mpegq.active)) {
 499                 pr_info("resume mpeg\n");
 500                 cx8802_restart_queue(dev, &dev->mpegq);
 501         }
 502         spin_unlock_irqrestore(&dev->slock, flags);
 503
 504         return 0;
 505 }
 506
 507 struct cx8802_driver *cx8802_get_driver(struct cx8802_dev *dev,
 508                                         enum cx88_board_type btype)
 509 {
 510         struct cx8802_driver *d;
 511
 512         list_for_each_entry(d, &dev->drvlist, drvlist)
 513                 if (d->type_id == btype)
 514                         return d;
 515
 516         return NULL;
 517 }
 518 EXPORT_SYMBOL(cx8802_get_driver);
 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) /
 537                           sizeof(struct cx88_input));
 538                      i++) {
 539                         if (core->board.input[i].type == CX88_VMUX_DVB) {
 540                                 core->input = i;
 541                                 break;
 542                         }
 543                 }
 544         }
 545
 546         if (drv->advise_acquire) {
 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                 dprintk(1, "Post acquire GPIO=%x\n", 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                 if (drv->type_id == CX88_MPEG_DVB) {
 566                         /*
 567                          * If the DVB driver is releasing, reset the input
 568                          * state to the last configured analog input
 569                          */
 570                         core->input = core->last_analog_input;
 571                 }
 572
 573                 drv->advise_release(drv);
 574                 core->active_type_id = CX88_BOARD_NONE;
 575                 dprintk(1, "Post release GPIO=%x\n", cx_read(MO_GP0_IO));
 576         }
 577
 578         return 0;
 579 }
 580
 581 static int cx8802_check_driver(struct cx8802_driver *drv)
 582 {
 583         if (!drv)
 584                 return -ENODEV;
 585
 586         if ((drv->type_id != CX88_MPEG_DVB) &&
 587             (drv->type_id != CX88_MPEG_BLACKBIRD))
 588                 return -EINVAL;
 589
 590         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
 591             (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
 592                 return -EINVAL;
 593
 594         if ((!drv->probe) ||
 595             (!drv->remove) ||
 596             (!drv->advise_acquire) ||
 597             (!drv->advise_release))
 598                 return -EINVAL;
 599
 600         return 0;
 601 }
 602
 603 int cx8802_register_driver(struct cx8802_driver *drv)
 604 {
 605         struct cx8802_dev *dev;
 606         struct cx8802_driver *driver;
 607         int err, i = 0;
 608
 609         pr_info("registering cx8802 driver, type: %s access: %s\n",
 610                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 611                 drv->hw_access == CX8802_DRVCTL_SHARED ?
 612                                   "shared" : "exclusive");
 613
 614         err = cx8802_check_driver(drv);
 615         if (err) {
 616                 pr_err("cx8802_driver is invalid\n");
 617                 return err;
 618         }
 619
 620         mutex_lock(&cx8802_mutex);
 621
 622         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 623                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
 624                         dev->pci->subsystem_vendor,
 625                         dev->pci->subsystem_device, dev->core->board.name,
 626                         dev->core->boardnr);
 627
 628                 /* Bring up a new struct for each driver instance */
 629                 driver = kzalloc(sizeof(*drv), GFP_KERNEL);
 630                 if (!driver) {
 631                         err = -ENOMEM;
 632                         goto out;
 633                 }
 634
 635                 /* Snapshot of the driver registration data */
 636                 drv->core = dev->core;
 637                 drv->suspend = cx8802_suspend_common;
 638                 drv->resume = cx8802_resume_common;
 639                 drv->request_acquire = cx8802_request_acquire;
 640                 drv->request_release = cx8802_request_release;
 641                 memcpy(driver, drv, sizeof(*driver));
 642
 643                 mutex_lock(&drv->core->lock);
 644                 err = drv->probe(driver);
 645                 if (err == 0) {
 646                         i++;
 647                         list_add_tail(&driver->drvlist, &dev->drvlist);
 648                 } else {
 649                         pr_err("cx8802 probe failed, err = %d\n", err);
 650                 }
 651                 mutex_unlock(&drv->core->lock);
 652         }
 653
 654         err = i ? 0 : -ENODEV;
 655 out:
 656         mutex_unlock(&cx8802_mutex);
 657         return err;
 658 }
 659 EXPORT_SYMBOL(cx8802_register_driver);
 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         pr_info("unregistering cx8802 driver, type: %s access: %s\n",
 668                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 669                 drv->hw_access == CX8802_DRVCTL_SHARED ?
 670                                   "shared" : "exclusive");
 671
 672         mutex_lock(&cx8802_mutex);
 673
 674         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 675                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
 676                         dev->pci->subsystem_vendor,
 677                         dev->pci->subsystem_device, dev->core->board.name,
 678                         dev->core->boardnr);
 679
 680                 mutex_lock(&dev->core->lock);
 681
 682                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
 683                         /* only unregister the correct driver type */
 684                         if (d->type_id != drv->type_id)
 685                                 continue;
 686
 687                         err = d->remove(d);
 688                         if (err == 0) {
 689                                 list_del(&d->drvlist);
 690                                 kfree(d);
 691                         } else
 692                                 pr_err("cx8802 driver remove failed (%d)\n",
 693                                        err);
 694                 }
 695
 696                 mutex_unlock(&dev->core->lock);
 697         }
 698
 699         mutex_unlock(&cx8802_mutex);
 700
 701         return err;
 702 }
 703 EXPORT_SYMBOL(cx8802_unregister_driver);
 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 (!core)
 716                 return -EINVAL;
 717
 718         pr_info("cx2388x 8802 Driver Manager\n");
 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 (!dev)
 727                 goto fail_core;
 728         dev->pci = pci_dev;
 729         dev->core = core;
 730
 731         /* Maintain a reference so cx88-video can query the 8802 device. */
 732         core->dvbdev = dev;
 733
 734         err = cx8802_init_common(dev);
 735         if (err != 0)
 736                 goto fail_dev;
 737
 738         INIT_LIST_HEAD(&dev->drvlist);
 739         mutex_lock(&cx8802_mutex);
 740         list_add_tail(&dev->devlist, &cx8802_devlist);
 741         mutex_unlock(&cx8802_mutex);
 742
 743         /* now autoload cx88-dvb or cx88-blackbird */
 744         request_modules(dev);
 745         return 0;
 746
 747  fail_dev:
 748         kfree(dev);
 749  fail_core:
 750         core->dvbdev = NULL;
 751         cx88_core_put(core, pci_dev);
 752         return err;
 753 }
 754
 755 static void cx8802_remove(struct pci_dev *pci_dev)
 756 {
 757         struct cx8802_dev *dev;
 758
 759         dev = pci_get_drvdata(pci_dev);
 760
 761         dprintk(1, "%s\n", __func__);
 762
 763         flush_request_modules(dev);
 764
 765         mutex_lock(&dev->core->lock);
 766
 767         if (!list_empty(&dev->drvlist)) {
 768                 struct cx8802_driver *drv, *tmp;
 769                 int err;
 770
 771                 pr_warn("Trying to remove cx8802 driver while cx8802 sub-drivers still loaded?!\n");
 772
 773                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
 774                         err = drv->remove(drv);
 775                         if (err == 0) {
 776                                 list_del(&drv->drvlist);
 777                         } else
 778                                 pr_err("cx8802 driver remove failed (%d)\n",
 779                                        err);
 780                         kfree(drv);
 781                 }
 782         }
 783
 784         mutex_unlock(&dev->core->lock);
 785
 786         /* Destroy any 8802 reference. */
 787         dev->core->dvbdev = NULL;
 788
 789         /* common */
 790         cx8802_fini_common(dev);
 791         cx88_core_put(dev->core, dev->pci);
 792         kfree(dev);
 793 }
 794
 795 static const struct pci_device_id cx8802_pci_tbl[] = {
 796         {
 797                 .vendor       = 0x14f1,
 798                 .device       = 0x8802,
 799                 .subvendor    = PCI_ANY_ID,
 800                 .subdevice    = PCI_ANY_ID,
 801         }, {
 802                 /* --- end of list --- */
 803         }
 804 };
 805 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
 806
 807 static struct pci_driver cx8802_pci_driver = {
 808         .name     = "cx88-mpeg driver manager",
 809         .id_table = cx8802_pci_tbl,
 810         .probe    = cx8802_probe,
 811         .remove   = cx8802_remove,
 812 };
 813
 814 module_pci_driver(cx8802_pci_driver);