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         /* clear interrupt status register */
 175         cx_write(MO_TS_INTSTAT,  0x1f1111);
 176
 177         /* enable irqs */
 178         dprintk(1, "setting the interrupt mask\n");
 179         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
 180         cx_set(MO_TS_INTMSK,  0x1f0011);
 181
 182         /* start dma */
 183         cx_set(MO_DEV_CNTRL2, (1 << 5));
 184         cx_set(MO_TS_DMACNTRL, 0x11);
 185         return 0;
 186 }
 187 EXPORT_SYMBOL(cx8802_start_dma);
 188
 189 static int cx8802_stop_dma(struct cx8802_dev *dev)
 190 {
 191         struct cx88_core *core = dev->core;
 192
 193         dprintk(1, "\n");
 194
 195         /* stop dma */
 196         cx_clear(MO_TS_DMACNTRL, 0x11);
 197
 198         /* disable irqs */
 199         cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
 200         cx_clear(MO_TS_INTMSK, 0x1f0011);
 201
 202         /* Reset the controller */
 203         cx_write(TS_GEN_CNTRL, 0xcd);
 204         return 0;
 205 }
 206
 207 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 208                                 struct cx88_dmaqueue *q)
 209 {
 210         struct cx88_buffer *buf;
 211
 212         dprintk(1, "\n");
 213         if (list_empty(&q->active))
 214                 return 0;
 215
 216         buf = list_entry(q->active.next, struct cx88_buffer, list);
 217         dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 218                 buf, buf->vb.vb2_buf.index);
 219         cx8802_start_dma(dev, q, buf);
 220         return 0;
 221 }
 222
 223 /* ------------------------------------------------------------------ */
 224
 225 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
 226                        struct cx88_buffer *buf)
 227 {
 228         int size = dev->ts_packet_size * dev->ts_packet_count;
 229         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
 230         struct cx88_riscmem *risc = &buf->risc;
 231         int rc;
 232
 233         if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
 234                 return -EINVAL;
 235         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
 236
 237         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
 238                                   dev->ts_packet_size, dev->ts_packet_count, 0);
 239         if (rc) {
 240                 if (risc->cpu)
 241                         pci_free_consistent(dev->pci, risc->size,
 242                                             risc->cpu, risc->dma);
 243                 memset(risc, 0, sizeof(*risc));
 244                 return rc;
 245         }
 246         return 0;
 247 }
 248 EXPORT_SYMBOL(cx8802_buf_prepare);
 249
 250 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 251 {
 252         struct cx88_buffer    *prev;
 253         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
 254
 255         dprintk(1, "\n");
 256         /* add jump to start */
 257         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
 258         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 259         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
 260
 261         if (list_empty(&cx88q->active)) {
 262                 dprintk(1, "queue is empty - first active\n");
 263                 list_add_tail(&buf->list, &cx88q->active);
 264                 dprintk(1, "[%p/%d] %s - first active\n",
 265                         buf, buf->vb.vb2_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                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 273                 dprintk(1, "[%p/%d] %s - append to active\n",
 274                         buf, buf->vb.vb2_buf.index, __func__);
 275         }
 276 }
 277 EXPORT_SYMBOL(cx8802_buf_queue);
 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, 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, "\n");
 299         cx8802_stop_dma(dev);
 300         do_cancel_buffers(dev);
 301 }
 302 EXPORT_SYMBOL(cx8802_cancel_buffers);
 303
 304 static const char *cx88_mpeg_irqs[32] = {
 305         "ts_risci1", NULL, NULL, NULL,
 306         "ts_risci2", NULL, NULL, NULL,
 307         "ts_oflow",  NULL, NULL, NULL,
 308         "ts_sync",   NULL, NULL, NULL,
 309         "opc_err", "par_err", "rip_err", "pci_abort",
 310         "ts_err?",
 311 };
 312
 313 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 314 {
 315         struct cx88_core *core = dev->core;
 316         u32 status, mask, count;
 317
 318         dprintk(1, "\n");
 319         status = cx_read(MO_TS_INTSTAT);
 320         mask   = cx_read(MO_TS_INTMSK);
 321         if (0 == (status & mask))
 322                 return;
 323
 324         cx_write(MO_TS_INTSTAT, status);
 325
 326         if (debug || (status & mask & ~0xff))
 327                 cx88_print_irqbits("irq mpeg ",
 328                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
 329                                    status, mask);
 330
 331         /* risc op code error */
 332         if (status & (1 << 16)) {
 333                 pr_warn("mpeg risc op code error\n");
 334                 cx_clear(MO_TS_DMACNTRL, 0x11);
 335                 cx88_sram_channel_dump(dev->core,
 336                                        &cx88_sram_channels[SRAM_CH28]);
 337         }
 338
 339         /* risc1 y */
 340         if (status & 0x01) {
 341                 dprintk(1, "wake up\n");
 342                 spin_lock(&dev->slock);
 343                 count = cx_read(MO_TS_GPCNT);
 344                 cx88_wakeup(dev->core, &dev->mpegq, count);
 345                 spin_unlock(&dev->slock);
 346         }
 347
 348         /* other general errors */
 349         if (status & 0x1f0100) {
 350                 dprintk(0, "general errors: 0x%08x\n", status & 0x1f0100);
 351                 spin_lock(&dev->slock);
 352                 cx8802_stop_dma(dev);
 353                 spin_unlock(&dev->slock);
 354         }
 355 }
 356
 357 #define MAX_IRQ_LOOP 10
 358
 359 static irqreturn_t cx8802_irq(int irq, void *dev_id)
 360 {
 361         struct cx8802_dev *dev = dev_id;
 362         struct cx88_core *core = dev->core;
 363         u32 status;
 364         int loop, handled = 0;
 365
 366         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 367                 status = cx_read(MO_PCI_INTSTAT) &
 368                         (core->pci_irqmask | PCI_INT_TSINT);
 369                 if (status == 0)
 370                         goto out;
 371                 dprintk(1, "cx8802_irq\n");
 372                 dprintk(1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP);
 373                 dprintk(1, "    status: %d\n", status);
 374                 handled = 1;
 375                 cx_write(MO_PCI_INTSTAT, status);
 376
 377                 if (status & core->pci_irqmask)
 378                         cx88_core_irq(core, status);
 379                 if (status & PCI_INT_TSINT)
 380                         cx8802_mpeg_irq(dev);
 381         }
 382         if (loop == MAX_IRQ_LOOP) {
 383                 dprintk(0, "clearing mask\n");
 384                 pr_warn("irq loop -- clearing mask\n");
 385                 cx_write(MO_PCI_INTMSK, 0);
 386         }
 387
 388  out:
 389         return IRQ_RETVAL(handled);
 390 }
 391
 392 static int cx8802_init_common(struct cx8802_dev *dev)
 393 {
 394         struct cx88_core *core = dev->core;
 395         int err;
 396
 397         /* pci init */
 398         if (pci_enable_device(dev->pci))
 399                 return -EIO;
 400         pci_set_master(dev->pci);
 401         err = pci_set_dma_mask(dev->pci, DMA_BIT_MASK(32));
 402         if (err) {
 403                 pr_err("Oops: no 32bit PCI DMA ???\n");
 404                 return -EIO;
 405         }
 406
 407         dev->pci_rev = dev->pci->revision;
 408         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 409         pr_info("found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
 410                 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 411                 dev->pci_lat,
 412                 (unsigned long long)pci_resource_start(dev->pci, 0));
 413
 414         /* initialize driver struct */
 415         spin_lock_init(&dev->slock);
 416
 417         /* init dma queue */
 418         INIT_LIST_HEAD(&dev->mpegq.active);
 419
 420         /* get irq */
 421         err = request_irq(dev->pci->irq, cx8802_irq,
 422                           IRQF_SHARED, dev->core->name, dev);
 423         if (err < 0) {
 424                 pr_err("can't get IRQ %d\n", dev->pci->irq);
 425                 return err;
 426         }
 427         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 428
 429         /* everything worked */
 430         pci_set_drvdata(dev->pci, dev);
 431         return 0;
 432 }
 433
 434 static void cx8802_fini_common(struct cx8802_dev *dev)
 435 {
 436         dprintk(2, "\n");
 437         cx8802_stop_dma(dev);
 438         pci_disable_device(dev->pci);
 439
 440         /* unregister stuff */
 441         free_irq(dev->pci->irq, dev);
 442 }
 443
 444 /* ----------------------------------------------------------- */
 445
 446 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 447 {
 448         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 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                 pr_info("suspend mpeg\n");
 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 (pci_set_power_state(pci_dev,
 465                                 pci_choose_state(pci_dev, state)) != 0) {
 466                 pci_disable_device(pci_dev);
 467                 dev->state.disabled = 1;
 468         }
 469         return 0;
 470 }
 471
 472 static int cx8802_resume_common(struct pci_dev *pci_dev)
 473 {
 474         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 475         unsigned long flags;
 476         int err;
 477
 478         if (dev->state.disabled) {
 479                 err = pci_enable_device(pci_dev);
 480                 if (err) {
 481                         pr_err("can't enable device\n");
 482                         return err;
 483                 }
 484                 dev->state.disabled = 0;
 485         }
 486         err = pci_set_power_state(pci_dev, PCI_D0);
 487         if (err) {
 488                 pr_err("can't enable device\n");
 489                 pci_disable_device(pci_dev);
 490                 dev->state.disabled = 1;
 491
 492                 return err;
 493         }
 494         pci_restore_state(pci_dev);
 495
 496         /* FIXME: re-initialize hardware */
 497         cx88_reset(dev->core);
 498
 499         /* restart video+vbi capture */
 500         spin_lock_irqsave(&dev->slock, flags);
 501         if (!list_empty(&dev->mpegq.active)) {
 502                 pr_info("resume mpeg\n");
 503                 cx8802_restart_queue(dev, &dev->mpegq);
 504         }
 505         spin_unlock_irqrestore(&dev->slock, flags);
 506
 507         return 0;
 508 }
 509
 510 struct cx8802_driver *cx8802_get_driver(struct cx8802_dev *dev,
 511                                         enum cx88_board_type btype)
 512 {
 513         struct cx8802_driver *d;
 514
 515         list_for_each_entry(d, &dev->drvlist, drvlist)
 516                 if (d->type_id == btype)
 517                         return d;
 518
 519         return NULL;
 520 }
 521 EXPORT_SYMBOL(cx8802_get_driver);
 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) /
 540                           sizeof(struct cx88_input));
 541                      i++) {
 542                         if (core->board.input[i].type == CX88_VMUX_DVB) {
 543                                 core->input = i;
 544                                 break;
 545                         }
 546                 }
 547         }
 548
 549         if (drv->advise_acquire) {
 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                 dprintk(1, "Post acquire GPIO=%x\n", 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                 if (drv->type_id == CX88_MPEG_DVB) {
 569                         /*
 570                          * If the DVB driver is releasing, reset the input
 571                          * state to the last configured analog input
 572                          */
 573                         core->input = core->last_analog_input;
 574                 }
 575
 576                 drv->advise_release(drv);
 577                 core->active_type_id = CX88_BOARD_NONE;
 578                 dprintk(1, "Post release GPIO=%x\n", cx_read(MO_GP0_IO));
 579         }
 580
 581         return 0;
 582 }
 583
 584 static int cx8802_check_driver(struct cx8802_driver *drv)
 585 {
 586         if (!drv)
 587                 return -ENODEV;
 588
 589         if ((drv->type_id != CX88_MPEG_DVB) &&
 590             (drv->type_id != CX88_MPEG_BLACKBIRD))
 591                 return -EINVAL;
 592
 593         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
 594             (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
 595                 return -EINVAL;
 596
 597         if ((!drv->probe) ||
 598             (!drv->remove) ||
 599             (!drv->advise_acquire) ||
 600             (!drv->advise_release))
 601                 return -EINVAL;
 602
 603         return 0;
 604 }
 605
 606 int cx8802_register_driver(struct cx8802_driver *drv)
 607 {
 608         struct cx8802_dev *dev;
 609         struct cx8802_driver *driver;
 610         int err, i = 0;
 611
 612         pr_info("registering cx8802 driver, type: %s access: %s\n",
 613                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 614                 drv->hw_access == CX8802_DRVCTL_SHARED ?
 615                                   "shared" : "exclusive");
 616
 617         err = cx8802_check_driver(drv);
 618         if (err) {
 619                 pr_err("cx8802_driver is invalid\n");
 620                 return err;
 621         }
 622
 623         mutex_lock(&cx8802_mutex);
 624
 625         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 626                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
 627                         dev->pci->subsystem_vendor,
 628                         dev->pci->subsystem_device, dev->core->board.name,
 629                         dev->core->boardnr);
 630
 631                 /* Bring up a new struct for each driver instance */
 632                 driver = kzalloc(sizeof(*drv), GFP_KERNEL);
 633                 if (!driver) {
 634                         err = -ENOMEM;
 635                         goto out;
 636                 }
 637
 638                 /* Snapshot of the driver registration data */
 639                 drv->core = dev->core;
 640                 drv->suspend = cx8802_suspend_common;
 641                 drv->resume = cx8802_resume_common;
 642                 drv->request_acquire = cx8802_request_acquire;
 643                 drv->request_release = cx8802_request_release;
 644                 memcpy(driver, drv, sizeof(*driver));
 645
 646                 mutex_lock(&drv->core->lock);
 647                 err = drv->probe(driver);
 648                 if (err == 0) {
 649                         i++;
 650                         list_add_tail(&driver->drvlist, &dev->drvlist);
 651                 } else {
 652                         pr_err("cx8802 probe failed, err = %d\n", err);
 653                 }
 654                 mutex_unlock(&drv->core->lock);
 655         }
 656
 657         err = i ? 0 : -ENODEV;
 658 out:
 659         mutex_unlock(&cx8802_mutex);
 660         return err;
 661 }
 662 EXPORT_SYMBOL(cx8802_register_driver);
 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         pr_info("unregistering cx8802 driver, type: %s access: %s\n",
 671                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 672                 drv->hw_access == CX8802_DRVCTL_SHARED ?
 673                                   "shared" : "exclusive");
 674
 675         mutex_lock(&cx8802_mutex);
 676
 677         list_for_each_entry(dev, &cx8802_devlist, devlist) {
 678                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
 679                         dev->pci->subsystem_vendor,
 680                         dev->pci->subsystem_device, dev->core->board.name,
 681                         dev->core->boardnr);
 682
 683                 mutex_lock(&dev->core->lock);
 684
 685                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
 686                         /* only unregister the correct driver type */
 687                         if (d->type_id != drv->type_id)
 688                                 continue;
 689
 690                         err = d->remove(d);
 691                         if (err == 0) {
 692                                 list_del(&d->drvlist);
 693                                 kfree(d);
 694                         } else
 695                                 pr_err("cx8802 driver remove failed (%d)\n",
 696                                        err);
 697                 }
 698
 699                 mutex_unlock(&dev->core->lock);
 700         }
 701
 702         mutex_unlock(&cx8802_mutex);
 703
 704         return err;
 705 }
 706 EXPORT_SYMBOL(cx8802_unregister_driver);
 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 (!core)
 719                 return -EINVAL;
 720
 721         pr_info("cx2388x 8802 Driver Manager\n");
 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 (!dev)
 730                 goto fail_core;
 731         dev->pci = pci_dev;
 732         dev->core = core;
 733
 734         /* Maintain a reference so cx88-video can query the 8802 device. */
 735         core->dvbdev = dev;
 736
 737         err = cx8802_init_common(dev);
 738         if (err != 0)
 739                 goto fail_dev;
 740
 741         INIT_LIST_HEAD(&dev->drvlist);
 742         mutex_lock(&cx8802_mutex);
 743         list_add_tail(&dev->devlist, &cx8802_devlist);
 744         mutex_unlock(&cx8802_mutex);
 745
 746         /* now autoload cx88-dvb or cx88-blackbird */
 747         request_modules(dev);
 748         return 0;
 749
 750  fail_dev:
 751         kfree(dev);
 752  fail_core:
 753         core->dvbdev = NULL;
 754         cx88_core_put(core, pci_dev);
 755         return err;
 756 }
 757
 758 static void cx8802_remove(struct pci_dev *pci_dev)
 759 {
 760         struct cx8802_dev *dev;
 761
 762         dev = pci_get_drvdata(pci_dev);
 763
 764         dprintk(1, "%s\n", __func__);
 765
 766         flush_request_modules(dev);
 767
 768         mutex_lock(&dev->core->lock);
 769
 770         if (!list_empty(&dev->drvlist)) {
 771                 struct cx8802_driver *drv, *tmp;
 772                 int err;
 773
 774                 pr_warn("Trying to remove cx8802 driver while cx8802 sub-drivers still loaded?!\n");
 775
 776                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
 777                         err = drv->remove(drv);
 778                         if (err == 0) {
 779                                 list_del(&drv->drvlist);
 780                         } else
 781                                 pr_err("cx8802 driver remove failed (%d)\n",
 782                                        err);
 783                         kfree(drv);
 784                 }
 785         }
 786
 787         mutex_unlock(&dev->core->lock);
 788
 789         /* Destroy any 8802 reference. */
 790         dev->core->dvbdev = NULL;
 791
 792         /* common */
 793         cx8802_fini_common(dev);
 794         cx88_core_put(dev->core, dev->pci);
 795         kfree(dev);
 796 }
 797
 798 static const struct pci_device_id cx8802_pci_tbl[] = {
 799         {
 800                 .vendor       = 0x14f1,
 801                 .device       = 0x8802,
 802                 .subvendor    = PCI_ANY_ID,
 803                 .subdevice    = PCI_ANY_ID,
 804         }, {
 805                 /* --- end of list --- */
 806         }
 807 };
 808 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
 809
 810 static struct pci_driver cx8802_pci_driver = {
 811         .name     = "cx88-mpeg driver manager",
 812         .id_table = cx8802_pci_tbl,
 813         .probe    = cx8802_probe,
 814         .remove   = cx8802_remove,
 815 };
 816
 817 module_pci_driver(cx8802_pci_driver);