kernel/drivers/media/pci/bt8xx/bt878.c

   1 /*
   2  * bt878.c: part of the driver for the Pinnacle PCTV Sat DVB PCI card
   3  *
   4  * Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de>
   5  *
   6  * large parts based on the bttv driver
   7  * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@metzlerbros.de)
   8  *                        & Marcus Metzler (mocm@metzlerbros.de)
   9  * (c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/pci.h>
  33 #include <asm/io.h>
  34 #include <linux/ioport.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/page.h>
  37 #include <linux/types.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/kmod.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/init.h>
  42
  43 #include "dmxdev.h"
  44 #include "dvbdev.h"
  45 #include "bt878.h"
  46 #include "dst_priv.h"
  47
  48
  49 /**************************************/
  50 /* Miscellaneous utility  definitions */
  51 /**************************************/
  52
  53 static unsigned int bt878_verbose = 1;
  54 static unsigned int bt878_debug;
  55
  56 module_param_named(verbose, bt878_verbose, int, 0444);
  57 MODULE_PARM_DESC(verbose,
  58                  "verbose startup messages, default is 1 (yes)");
  59 module_param_named(debug, bt878_debug, int, 0644);
  60 MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");
  61
  62 int bt878_num;
  63 struct bt878 bt878[BT878_MAX];
  64
  65 EXPORT_SYMBOL(bt878_num);
  66 EXPORT_SYMBOL(bt878);
  67
  68 #define btwrite(dat,adr)    bmtwrite((dat), (bt->bt878_mem+(adr)))
  69 #define btread(adr)         bmtread(bt->bt878_mem+(adr))
  70
  71 #define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
  72 #define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
  73 #define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
  74
  75 #if defined(dprintk)
  76 #undef dprintk
  77 #endif
  78 #define dprintk(fmt, arg...) \
  79         do { \
  80                 if (bt878_debug) \
  81                         printk(KERN_DEBUG fmt, ##arg); \
  82         } while (0)
  83
  84 static void bt878_mem_free(struct bt878 *bt)
  85 {
  86         if (bt->buf_cpu) {
  87                 pci_free_consistent(bt->dev, bt->buf_size, bt->buf_cpu,
  88                                     bt->buf_dma);
  89                 bt->buf_cpu = NULL;
  90         }
  91
  92         if (bt->risc_cpu) {
  93                 pci_free_consistent(bt->dev, bt->risc_size, bt->risc_cpu,
  94                                     bt->risc_dma);
  95                 bt->risc_cpu = NULL;
  96         }
  97 }
  98
  99 static int bt878_mem_alloc(struct bt878 *bt)
 100 {
 101         if (!bt->buf_cpu) {
 102                 bt->buf_size = 128 * 1024;
 103
 104                 bt->buf_cpu = pci_zalloc_consistent(bt->dev, bt->buf_size,
 105                                                     &bt->buf_dma);
 106                 if (!bt->buf_cpu)
 107                         return -ENOMEM;
 108         }
 109
 110         if (!bt->risc_cpu) {
 111                 bt->risc_size = PAGE_SIZE;
 112                 bt->risc_cpu = pci_zalloc_consistent(bt->dev, bt->risc_size,
 113                                                      &bt->risc_dma);
 114                 if (!bt->risc_cpu) {
 115                         bt878_mem_free(bt);
 116                         return -ENOMEM;
 117                 }
 118         }
 119
 120         return 0;
 121 }
 122
 123 /* RISC instructions */
 124 #define RISC_WRITE              (0x01 << 28)
 125 #define RISC_JUMP               (0x07 << 28)
 126 #define RISC_SYNC               (0x08 << 28)
 127
 128 /* RISC bits */
 129 #define RISC_WR_SOL             (1 << 27)
 130 #define RISC_WR_EOL             (1 << 26)
 131 #define RISC_IRQ                (1 << 24)
 132 #define RISC_STATUS(status)     ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
 133 #define RISC_SYNC_RESYNC        (1 << 15)
 134 #define RISC_SYNC_FM1           0x06
 135 #define RISC_SYNC_VRO           0x0C
 136
 137 #define RISC_FLUSH()            bt->risc_pos = 0
 138 #define RISC_INSTR(instr)       bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)
 139
 140 static int bt878_make_risc(struct bt878 *bt)
 141 {
 142         bt->block_bytes = bt->buf_size >> 4;
 143         bt->block_count = 1 << 4;
 144         bt->line_bytes = bt->block_bytes;
 145         bt->line_count = bt->block_count;
 146
 147         while (bt->line_bytes > 4095) {
 148                 bt->line_bytes >>= 1;
 149                 bt->line_count <<= 1;
 150         }
 151
 152         if (bt->line_count > 255) {
 153                 printk(KERN_ERR "bt878: buffer size error!\n");
 154                 return -EINVAL;
 155         }
 156         return 0;
 157 }
 158
 159
 160 static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
 161 {
 162         u32 buf_pos = 0;
 163         u32 line;
 164
 165         RISC_FLUSH();
 166         RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
 167         RISC_INSTR(0);
 168
 169         dprintk("bt878: risc len lines %u, bytes per line %u\n",
 170                         bt->line_count, bt->line_bytes);
 171         for (line = 0; line < bt->line_count; line++) {
 172                 // At the beginning of every block we issue an IRQ with previous (finished) block number set
 173                 if (!(buf_pos % bt->block_bytes))
 174                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 175                                    RISC_IRQ |
 176                                    RISC_STATUS(((buf_pos /
 177                                                  bt->block_bytes) +
 178                                                 (bt->block_count -
 179                                                  1)) %
 180                                                bt->block_count) | bt->
 181                                    line_bytes);
 182                 else
 183                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 184                                    bt->line_bytes);
 185                 RISC_INSTR(bt->buf_dma + buf_pos);
 186                 buf_pos += bt->line_bytes;
 187         }
 188
 189         RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
 190         RISC_INSTR(0);
 191
 192         RISC_INSTR(RISC_JUMP);
 193         RISC_INSTR(bt->risc_dma);
 194
 195         btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
 196 }
 197
 198 /*****************************/
 199 /* Start/Stop grabbing funcs */
 200 /*****************************/
 201
 202 void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
 203                 u32 irq_err_ignore)
 204 {
 205         u32 int_mask;
 206
 207         dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
 208         /* complete the writing of the risc dma program now we have
 209          * the card specifics
 210          */
 211         bt878_risc_program(bt, op_sync_orin);
 212         controlreg &= ~0x1f;
 213         controlreg |= 0x1b;
 214
 215         btwrite(bt->risc_dma, BT878_ARISC_START);
 216
 217         /* original int mask had :
 218          *    6    2    8    4    0
 219          * 1111 1111 1000 0000 0000
 220          * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
 221          * Hacked for DST to:
 222          * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
 223          */
 224         int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
 225                 BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
 226                 BT878_AFBUS | BT878_ARISCI;
 227
 228
 229         /* ignore pesky bits */
 230         int_mask &= ~irq_err_ignore;
 231
 232         btwrite(int_mask, BT878_AINT_MASK);
 233         btwrite(controlreg, BT878_AGPIO_DMA_CTL);
 234 }
 235
 236 void bt878_stop(struct bt878 *bt)
 237 {
 238         u32 stat;
 239         int i = 0;
 240
 241         dprintk("bt878 debug: bt878_stop\n");
 242
 243         btwrite(0, BT878_AINT_MASK);
 244         btand(~0x13, BT878_AGPIO_DMA_CTL);
 245
 246         do {
 247                 stat = btread(BT878_AINT_STAT);
 248                 if (!(stat & BT878_ARISC_EN))
 249                         break;
 250                 i++;
 251         } while (i < 500);
 252
 253         dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
 254                 bt->nr, i, stat);
 255 }
 256
 257 EXPORT_SYMBOL(bt878_start);
 258 EXPORT_SYMBOL(bt878_stop);
 259
 260 /*****************************/
 261 /* Interrupt service routine */
 262 /*****************************/
 263
 264 static irqreturn_t bt878_irq(int irq, void *dev_id)
 265 {
 266         u32 stat, astat, mask;
 267         int count;
 268         struct bt878 *bt;
 269
 270         bt = (struct bt878 *) dev_id;
 271
 272         count = 0;
 273         while (1) {
 274                 stat = btread(BT878_AINT_STAT);
 275                 mask = btread(BT878_AINT_MASK);
 276                 if (!(astat = (stat & mask)))
 277                         return IRQ_NONE;        /* this interrupt is not for me */
 278 /*              dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
 279                 btwrite(astat, BT878_AINT_STAT);        /* try to clear interrupt condition */
 280
 281
 282                 if (astat & (BT878_ASCERR | BT878_AOCERR)) {
 283                         if (bt878_verbose) {
 284                                 printk(KERN_INFO
 285                                        "bt878(%d): irq%s%s risc_pc=%08x\n",
 286                                        bt->nr,
 287                                        (astat & BT878_ASCERR) ? " SCERR" :
 288                                        "",
 289                                        (astat & BT878_AOCERR) ? " OCERR" :
 290                                        "", btread(BT878_ARISC_PC));
 291                         }
 292                 }
 293                 if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
 294                         if (bt878_verbose) {
 295                                 printk(KERN_INFO
 296                                      "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 297                                      bt->nr,
 298                                      (astat & BT878_APABORT) ? " PABORT" :
 299                                      "",
 300                                      (astat & BT878_ARIPERR) ? " RIPERR" :
 301                                      "",
 302                                      (astat & BT878_APPERR) ? " PPERR" :
 303                                      "", btread(BT878_ARISC_PC));
 304                         }
 305                 }
 306                 if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
 307                         if (bt878_verbose) {
 308                                 printk(KERN_INFO
 309                                      "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 310                                      bt->nr,
 311                                      (astat & BT878_AFDSR) ? " FDSR" : "",
 312                                      (astat & BT878_AFTRGT) ? " FTRGT" :
 313                                      "",
 314                                      (astat & BT878_AFBUS) ? " FBUS" : "",
 315                                      btread(BT878_ARISC_PC));
 316                         }
 317                 }
 318                 if (astat & BT878_ARISCI) {
 319                         bt->finished_block = (stat & BT878_ARISCS) >> 28;
 320                         tasklet_schedule(&bt->tasklet);
 321                         break;
 322                 }
 323                 count++;
 324                 if (count > 20) {
 325                         btwrite(0, BT878_AINT_MASK);
 326                         printk(KERN_ERR
 327                                "bt878(%d): IRQ lockup, cleared int mask\n",
 328                                bt->nr);
 329                         break;
 330                 }
 331         }
 332         return IRQ_HANDLED;
 333 }
 334
 335 int
 336 bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
 337 {
 338         int retval;
 339
 340         retval = 0;
 341         if (mutex_lock_interruptible(&bt->gpio_lock))
 342                 return -ERESTARTSYS;
 343         /* special gpio signal */
 344         switch (cmd) {
 345             case DST_IG_ENABLE:
 346                 // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
 347                 retval = bttv_gpio_enable(bt->bttv_nr,
 348                                 mp->enb.mask,
 349                                 mp->enb.enable);
 350                 break;
 351             case DST_IG_WRITE:
 352                 // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
 353                 retval = bttv_write_gpio(bt->bttv_nr,
 354                                 mp->outp.mask,
 355                                 mp->outp.highvals);
 356
 357                 break;
 358             case DST_IG_READ:
 359                 /* read */
 360                 retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
 361                 // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
 362                 break;
 363             case DST_IG_TS:
 364                 /* Set packet size */
 365                 bt->TS_Size = mp->psize;
 366                 break;
 367
 368             default:
 369                 retval = -EINVAL;
 370                 break;
 371         }
 372         mutex_unlock(&bt->gpio_lock);
 373         return retval;
 374 }
 375
 376 EXPORT_SYMBOL(bt878_device_control);
 377
 378 #define BROOKTREE_878_DEVICE(vend, dev, name) \
 379         { \
 380                 .vendor = PCI_VENDOR_ID_BROOKTREE, \
 381                 .device = PCI_DEVICE_ID_BROOKTREE_878, \
 382                 .subvendor = (vend), .subdevice = (dev), \
 383                 .driver_data = (unsigned long) name \
 384         }
 385
 386 static struct pci_device_id bt878_pci_tbl[] = {
 387         BROOKTREE_878_DEVICE(0x0071, 0x0101, "Nebula Electronics DigiTV"),
 388         BROOKTREE_878_DEVICE(0x1461, 0x0761, "AverMedia AverTV DVB-T 761"),
 389         BROOKTREE_878_DEVICE(0x11bd, 0x001c, "Pinnacle PCTV Sat"),
 390         BROOKTREE_878_DEVICE(0x11bd, 0x0026, "Pinnacle PCTV SAT CI"),
 391         BROOKTREE_878_DEVICE(0x1822, 0x0001, "Twinhan VisionPlus DVB"),
 392         BROOKTREE_878_DEVICE(0x270f, 0xfc00,
 393                                 "ChainTech digitop DST-1000 DVB-S"),
 394         BROOKTREE_878_DEVICE(0x1461, 0x0771, "AVermedia AverTV DVB-T 771"),
 395         BROOKTREE_878_DEVICE(0x18ac, 0xdb10, "DViCO FusionHDTV DVB-T Lite"),
 396         BROOKTREE_878_DEVICE(0x18ac, 0xdb11, "Ultraview DVB-T Lite"),
 397         BROOKTREE_878_DEVICE(0x18ac, 0xd500, "DViCO FusionHDTV 5 Lite"),
 398         BROOKTREE_878_DEVICE(0x7063, 0x2000, "pcHDTV HD-2000 TV"),
 399         BROOKTREE_878_DEVICE(0x1822, 0x0026, "DNTV Live! Mini"),
 400         { }
 401 };
 402
 403 MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
 404
 405 static const char * card_name(const struct pci_device_id *id)
 406 {
 407         return id->driver_data ? (const char *)id->driver_data : "Unknown";
 408 }
 409
 410 /***********************/
 411 /* PCI device handling */
 412 /***********************/
 413
 414 static int bt878_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
 415 {
 416         int result = 0;
 417         unsigned char lat;
 418         struct bt878 *bt;
 419         unsigned int cardid;
 420
 421         printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
 422                bt878_num);
 423         if (bt878_num >= BT878_MAX) {
 424                 printk(KERN_ERR "bt878: Too many devices inserted\n");
 425                 result = -ENOMEM;
 426                 goto fail0;
 427         }
 428         if (pci_enable_device(dev))
 429                 return -EIO;
 430
 431         cardid = dev->subsystem_device << 16;
 432         cardid |= dev->subsystem_vendor;
 433
 434         printk(KERN_INFO "%s: card id=[0x%x],[ %s ] has DVB functions.\n",
 435                                 __func__, cardid, card_name(pci_id));
 436
 437         bt = &bt878[bt878_num];
 438         bt->dev = dev;
 439         bt->nr = bt878_num;
 440         bt->shutdown = 0;
 441
 442         bt->id = dev->device;
 443         bt->irq = dev->irq;
 444         bt->bt878_adr = pci_resource_start(dev, 0);
 445         if (!request_mem_region(pci_resource_start(dev, 0),
 446                                 pci_resource_len(dev, 0), "bt878")) {
 447                 result = -EBUSY;
 448                 goto fail0;
 449         }
 450
 451         bt->revision = dev->revision;
 452         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
 453
 454
 455         printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
 456                bt878_num, bt->id, bt->revision, dev->bus->number,
 457                PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 458         printk("irq: %d, latency: %d, memory: 0x%lx\n",
 459                bt->irq, lat, bt->bt878_adr);
 460
 461 #ifdef __sparc__
 462         bt->bt878_mem = (unsigned char *) bt->bt878_adr;
 463 #else
 464         bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
 465 #endif
 466
 467         /* clear interrupt mask */
 468         btwrite(0, BT848_INT_MASK);
 469
 470         result = request_irq(bt->irq, bt878_irq,
 471                              IRQF_SHARED, "bt878", (void *) bt);
 472         if (result == -EINVAL) {
 473                 printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
 474                        bt878_num);
 475                 goto fail1;
 476         }
 477         if (result == -EBUSY) {
 478                 printk(KERN_ERR
 479                        "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
 480                        bt878_num, bt->irq);
 481                 goto fail1;
 482         }
 483         if (result < 0)
 484                 goto fail1;
 485
 486         pci_set_master(dev);
 487         pci_set_drvdata(dev, bt);
 488
 489         if ((result = bt878_mem_alloc(bt))) {
 490                 printk(KERN_ERR "bt878: failed to allocate memory!\n");
 491                 goto fail2;
 492         }
 493
 494         bt878_make_risc(bt);
 495         btwrite(0, BT878_AINT_MASK);
 496         bt878_num++;
 497
 498         return 0;
 499
 500       fail2:
 501         free_irq(bt->irq, bt);
 502       fail1:
 503         release_mem_region(pci_resource_start(bt->dev, 0),
 504                            pci_resource_len(bt->dev, 0));
 505       fail0:
 506         pci_disable_device(dev);
 507         return result;
 508 }
 509
 510 static void bt878_remove(struct pci_dev *pci_dev)
 511 {
 512         u8 command;
 513         struct bt878 *bt = pci_get_drvdata(pci_dev);
 514
 515         if (bt878_verbose)
 516                 printk(KERN_INFO "bt878(%d): unloading\n", bt->nr);
 517
 518         /* turn off all capturing, DMA and IRQs */
 519         btand(~0x13, BT878_AGPIO_DMA_CTL);
 520
 521         /* first disable interrupts before unmapping the memory! */
 522         btwrite(0, BT878_AINT_MASK);
 523         btwrite(~0U, BT878_AINT_STAT);
 524
 525         /* disable PCI bus-mastering */
 526         pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
 527         /* Should this be &=~ ?? */
 528         command &= ~PCI_COMMAND_MASTER;
 529         pci_write_config_byte(bt->dev, PCI_COMMAND, command);
 530
 531         free_irq(bt->irq, bt);
 532         printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
 533         if (bt->bt878_mem)
 534                 iounmap(bt->bt878_mem);
 535
 536         release_mem_region(pci_resource_start(bt->dev, 0),
 537                            pci_resource_len(bt->dev, 0));
 538         /* wake up any waiting processes
 539            because shutdown flag is set, no new processes (in this queue)
 540            are expected
 541          */
 542         bt->shutdown = 1;
 543         bt878_mem_free(bt);
 544
 545         pci_disable_device(pci_dev);
 546         return;
 547 }
 548
 549 static struct pci_driver bt878_pci_driver = {
 550       .name     = "bt878",
 551       .id_table = bt878_pci_tbl,
 552       .probe    = bt878_probe,
 553       .remove   = bt878_remove,
 554 };
 555
 556 /*******************************/
 557 /* Module management functions */
 558 /*******************************/
 559
 560 static int __init bt878_init_module(void)
 561 {
 562         bt878_num = 0;
 563
 564         printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
 565                (BT878_VERSION_CODE >> 16) & 0xff,
 566                (BT878_VERSION_CODE >> 8) & 0xff,
 567                BT878_VERSION_CODE & 0xff);
 568
 569         return pci_register_driver(&bt878_pci_driver);
 570 }
 571
 572 static void __exit bt878_cleanup_module(void)
 573 {
 574         pci_unregister_driver(&bt878_pci_driver);
 575 }
 576
 577 module_init(bt878_init_module);
 578 module_exit(bt878_cleanup_module);
 579
 580 MODULE_LICENSE("GPL");