linux/drivers/media/dvb/bt8xx/bt878.c
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   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
  53static unsigned int bt878_verbose = 1;
  54static unsigned int bt878_debug;
  55
  56module_param_named(verbose, bt878_verbose, int, 0444);
  57MODULE_PARM_DESC(verbose,
  58                 "verbose startup messages, default is 1 (yes)");
  59module_param_named(debug, bt878_debug, int, 0644);
  60MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");
  61
  62int bt878_num;
  63struct bt878 bt878[BT878_MAX];
  64
  65EXPORT_SYMBOL(bt878_num);
  66EXPORT_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
  84static 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
  99static int bt878_mem_alloc(struct bt878 *bt)
 100{
 101        if (!bt->buf_cpu) {
 102                bt->buf_size = 128 * 1024;
 103
 104                bt->buf_cpu =
 105                    pci_alloc_consistent(bt->dev, bt->buf_size,
 106                                         &bt->buf_dma);
 107
 108                if (!bt->buf_cpu)
 109                        return -ENOMEM;
 110
 111                memset(bt->buf_cpu, 0, bt->buf_size);
 112        }
 113
 114        if (!bt->risc_cpu) {
 115                bt->risc_size = PAGE_SIZE;
 116                bt->risc_cpu =
 117                    pci_alloc_consistent(bt->dev, bt->risc_size,
 118                                         &bt->risc_dma);
 119
 120                if (!bt->risc_cpu) {
 121                        bt878_mem_free(bt);
 122                        return -ENOMEM;
 123                }
 124
 125                memset(bt->risc_cpu, 0, bt->risc_size);
 126        }
 127
 128        return 0;
 129}
 130
 131/* RISC instructions */
 132#define RISC_WRITE              (0x01 << 28)
 133#define RISC_JUMP               (0x07 << 28)
 134#define RISC_SYNC               (0x08 << 28)
 135
 136/* RISC bits */
 137#define RISC_WR_SOL             (1 << 27)
 138#define RISC_WR_EOL             (1 << 26)
 139#define RISC_IRQ                (1 << 24)
 140#define RISC_STATUS(status)     ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
 141#define RISC_SYNC_RESYNC        (1 << 15)
 142#define RISC_SYNC_FM1           0x06
 143#define RISC_SYNC_VRO           0x0C
 144
 145#define RISC_FLUSH()            bt->risc_pos = 0
 146#define RISC_INSTR(instr)       bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)
 147
 148static int bt878_make_risc(struct bt878 *bt)
 149{
 150        bt->block_bytes = bt->buf_size >> 4;
 151        bt->block_count = 1 << 4;
 152        bt->line_bytes = bt->block_bytes;
 153        bt->line_count = bt->block_count;
 154
 155        while (bt->line_bytes > 4095) {
 156                bt->line_bytes >>= 1;
 157                bt->line_count <<= 1;
 158        }
 159
 160        if (bt->line_count > 255) {
 161                printk(KERN_ERR "bt878: buffer size error!\n");
 162                return -EINVAL;
 163        }
 164        return 0;
 165}
 166
 167
 168static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
 169{
 170        u32 buf_pos = 0;
 171        u32 line;
 172
 173        RISC_FLUSH();
 174        RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
 175        RISC_INSTR(0);
 176
 177        dprintk("bt878: risc len lines %u, bytes per line %u\n",
 178                        bt->line_count, bt->line_bytes);
 179        for (line = 0; line < bt->line_count; line++) {
 180                // At the beginning of every block we issue an IRQ with previous (finished) block number set
 181                if (!(buf_pos % bt->block_bytes))
 182                        RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 183                                   RISC_IRQ |
 184                                   RISC_STATUS(((buf_pos /
 185                                                 bt->block_bytes) +
 186                                                (bt->block_count -
 187                                                 1)) %
 188                                               bt->block_count) | bt->
 189                                   line_bytes);
 190                else
 191                        RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 192                                   bt->line_bytes);
 193                RISC_INSTR(bt->buf_dma + buf_pos);
 194                buf_pos += bt->line_bytes;
 195        }
 196
 197        RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
 198        RISC_INSTR(0);
 199
 200        RISC_INSTR(RISC_JUMP);
 201        RISC_INSTR(bt->risc_dma);
 202
 203        btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
 204}
 205
 206/*****************************/
 207/* Start/Stop grabbing funcs */
 208/*****************************/
 209
 210void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
 211                u32 irq_err_ignore)
 212{
 213        u32 int_mask;
 214
 215        dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
 216        /* complete the writing of the risc dma program now we have
 217         * the card specifics
 218         */
 219        bt878_risc_program(bt, op_sync_orin);
 220        controlreg &= ~0x1f;
 221        controlreg |= 0x1b;
 222
 223        btwrite(bt->risc_dma, BT878_ARISC_START);
 224
 225        /* original int mask had :
 226         *    6    2    8    4    0
 227         * 1111 1111 1000 0000 0000
 228         * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
 229         * Hacked for DST to:
 230         * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
 231         */
 232        int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
 233                BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
 234                BT878_AFBUS | BT878_ARISCI;
 235
 236
 237        /* ignore pesky bits */
 238        int_mask &= ~irq_err_ignore;
 239
 240        btwrite(int_mask, BT878_AINT_MASK);
 241        btwrite(controlreg, BT878_AGPIO_DMA_CTL);
 242}
 243
 244void bt878_stop(struct bt878 *bt)
 245{
 246        u32 stat;
 247        int i = 0;
 248
 249        dprintk("bt878 debug: bt878_stop\n");
 250
 251        btwrite(0, BT878_AINT_MASK);
 252        btand(~0x13, BT878_AGPIO_DMA_CTL);
 253
 254        do {
 255                stat = btread(BT878_AINT_STAT);
 256                if (!(stat & BT878_ARISC_EN))
 257                        break;
 258                i++;
 259        } while (i < 500);
 260
 261        dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
 262                bt->nr, i, stat);
 263}
 264
 265EXPORT_SYMBOL(bt878_start);
 266EXPORT_SYMBOL(bt878_stop);
 267
 268/*****************************/
 269/* Interrupt service routine */
 270/*****************************/
 271
 272static irqreturn_t bt878_irq(int irq, void *dev_id)
 273{
 274        u32 stat, astat, mask;
 275        int count;
 276        struct bt878 *bt;
 277
 278        bt = (struct bt878 *) dev_id;
 279
 280        count = 0;
 281        while (1) {
 282                stat = btread(BT878_AINT_STAT);
 283                mask = btread(BT878_AINT_MASK);
 284                if (!(astat = (stat & mask)))
 285                        return IRQ_NONE;        /* this interrupt is not for me */
 286/*              dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
 287                btwrite(astat, BT878_AINT_STAT);        /* try to clear interrupt condition */
 288
 289
 290                if (astat & (BT878_ASCERR | BT878_AOCERR)) {
 291                        if (bt878_verbose) {
 292                                printk(KERN_INFO
 293                                       "bt878(%d): irq%s%s risc_pc=%08x\n",
 294                                       bt->nr,
 295                                       (astat & BT878_ASCERR) ? " SCERR" :
 296                                       "",
 297                                       (astat & BT878_AOCERR) ? " OCERR" :
 298                                       "", btread(BT878_ARISC_PC));
 299                        }
 300                }
 301                if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
 302                        if (bt878_verbose) {
 303                                printk(KERN_INFO
 304                                     "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 305                                     bt->nr,
 306                                     (astat & BT878_APABORT) ? " PABORT" :
 307                                     "",
 308                                     (astat & BT878_ARIPERR) ? " RIPERR" :
 309                                     "",
 310                                     (astat & BT878_APPERR) ? " PPERR" :
 311                                     "", btread(BT878_ARISC_PC));
 312                        }
 313                }
 314                if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
 315                        if (bt878_verbose) {
 316                                printk(KERN_INFO
 317                                     "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 318                                     bt->nr,
 319                                     (astat & BT878_AFDSR) ? " FDSR" : "",
 320                                     (astat & BT878_AFTRGT) ? " FTRGT" :
 321                                     "",
 322                                     (astat & BT878_AFBUS) ? " FBUS" : "",
 323                                     btread(BT878_ARISC_PC));
 324                        }
 325                }
 326                if (astat & BT878_ARISCI) {
 327                        bt->finished_block = (stat & BT878_ARISCS) >> 28;
 328                        tasklet_schedule(&bt->tasklet);
 329                        break;
 330                }
 331                count++;
 332                if (count > 20) {
 333                        btwrite(0, BT878_AINT_MASK);
 334                        printk(KERN_ERR
 335                               "bt878(%d): IRQ lockup, cleared int mask\n",
 336                               bt->nr);
 337                        break;
 338                }
 339        }
 340        return IRQ_HANDLED;
 341}
 342
 343int
 344bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
 345{
 346        int retval;
 347
 348        retval = 0;
 349        if (mutex_lock_interruptible(&bt->gpio_lock))
 350                return -ERESTARTSYS;
 351        /* special gpio signal */
 352        switch (cmd) {
 353            case DST_IG_ENABLE:
 354                // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
 355                retval = bttv_gpio_enable(bt->bttv_nr,
 356                                mp->enb.mask,
 357                                mp->enb.enable);
 358                break;
 359            case DST_IG_WRITE:
 360                // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
 361                retval = bttv_write_gpio(bt->bttv_nr,
 362                                mp->outp.mask,
 363                                mp->outp.highvals);
 364
 365                break;
 366            case DST_IG_READ:
 367                /* read */
 368                retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
 369                // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
 370                break;
 371            case DST_IG_TS:
 372                /* Set packet size */
 373                bt->TS_Size = mp->psize;
 374                break;
 375
 376            default:
 377                retval = -EINVAL;
 378                break;
 379        }
 380        mutex_unlock(&bt->gpio_lock);
 381        return retval;
 382}
 383
 384EXPORT_SYMBOL(bt878_device_control);
 385
 386#define BROOKTREE_878_DEVICE(vend, dev, name) \
 387        { \
 388                .vendor = PCI_VENDOR_ID_BROOKTREE, \
 389                .device = PCI_DEVICE_ID_BROOKTREE_878, \
 390                .subvendor = (vend), .subdevice = (dev), \
 391                .driver_data = (unsigned long) name \
 392        }
 393
 394static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
 395        BROOKTREE_878_DEVICE(0x0071, 0x0101, "Nebula Electronics DigiTV"),
 396        BROOKTREE_878_DEVICE(0x1461, 0x0761, "AverMedia AverTV DVB-T 761"),
 397        BROOKTREE_878_DEVICE(0x11bd, 0x001c, "Pinnacle PCTV Sat"),
 398        BROOKTREE_878_DEVICE(0x11bd, 0x0026, "Pinnacle PCTV SAT CI"),
 399        BROOKTREE_878_DEVICE(0x1822, 0x0001, "Twinhan VisionPlus DVB"),
 400        BROOKTREE_878_DEVICE(0x270f, 0xfc00,
 401                                "ChainTech digitop DST-1000 DVB-S"),
 402        BROOKTREE_878_DEVICE(0x1461, 0x0771, "AVermedia AverTV DVB-T 771"),
 403        BROOKTREE_878_DEVICE(0x18ac, 0xdb10, "DViCO FusionHDTV DVB-T Lite"),
 404        BROOKTREE_878_DEVICE(0x18ac, 0xdb11, "Ultraview DVB-T Lite"),
 405        BROOKTREE_878_DEVICE(0x18ac, 0xd500, "DViCO FusionHDTV 5 Lite"),
 406        BROOKTREE_878_DEVICE(0x7063, 0x2000, "pcHDTV HD-2000 TV"),
 407        BROOKTREE_878_DEVICE(0x1822, 0x0026, "DNTV Live! Mini"),
 408        { }
 409};
 410
 411MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
 412
 413static const char * __devinit card_name(const struct pci_device_id *id)
 414{
 415        return id->driver_data ? (const char *)id->driver_data : "Unknown";
 416}
 417
 418/***********************/
 419/* PCI device handling */
 420/***********************/
 421
 422static int __devinit bt878_probe(struct pci_dev *dev,
 423                                 const struct pci_device_id *pci_id)
 424{
 425        int result = 0;
 426        unsigned char lat;
 427        struct bt878 *bt;
 428#if defined(__powerpc__)
 429        unsigned int cmd;
 430#endif
 431        unsigned int cardid;
 432
 433        printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
 434               bt878_num);
 435        if (bt878_num >= BT878_MAX) {
 436                printk(KERN_ERR "bt878: Too many devices inserted\n");
 437                result = -ENOMEM;
 438                goto fail0;
 439        }
 440        if (pci_enable_device(dev))
 441                return -EIO;
 442
 443        cardid = dev->subsystem_device << 16;
 444        cardid |= dev->subsystem_vendor;
 445
 446        printk(KERN_INFO "%s: card id=[0x%x],[ %s ] has DVB functions.\n",
 447                                __func__, cardid, card_name(pci_id));
 448
 449        bt = &bt878[bt878_num];
 450        bt->dev = dev;
 451        bt->nr = bt878_num;
 452        bt->shutdown = 0;
 453
 454        bt->id = dev->device;
 455        bt->irq = dev->irq;
 456        bt->bt878_adr = pci_resource_start(dev, 0);
 457        if (!request_mem_region(pci_resource_start(dev, 0),
 458                                pci_resource_len(dev, 0), "bt878")) {
 459                result = -EBUSY;
 460                goto fail0;
 461        }
 462
 463        bt->revision = dev->revision;
 464        pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
 465
 466
 467        printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
 468               bt878_num, bt->id, bt->revision, dev->bus->number,
 469               PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 470        printk("irq: %d, latency: %d, memory: 0x%lx\n",
 471               bt->irq, lat, bt->bt878_adr);
 472
 473
 474#if defined(__powerpc__)
 475        /* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
 476        /* response on cards with no firmware is not enabled by OF */
 477        pci_read_config_dword(dev, PCI_COMMAND, &cmd);
 478        cmd = (cmd | PCI_COMMAND_MEMORY);
 479        pci_write_config_dword(dev, PCI_COMMAND, cmd);
 480#endif
 481
 482#ifdef __sparc__
 483        bt->bt878_mem = (unsigned char *) bt->bt878_adr;
 484#else
 485        bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
 486#endif
 487
 488        /* clear interrupt mask */
 489        btwrite(0, BT848_INT_MASK);
 490
 491        result = request_irq(bt->irq, bt878_irq,
 492                             IRQF_SHARED | IRQF_DISABLED, "bt878",
 493                             (void *) bt);
 494        if (result == -EINVAL) {
 495                printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
 496                       bt878_num);
 497                goto fail1;
 498        }
 499        if (result == -EBUSY) {
 500                printk(KERN_ERR
 501                       "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
 502                       bt878_num, bt->irq);
 503                goto fail1;
 504        }
 505        if (result < 0)
 506                goto fail1;
 507
 508        pci_set_master(dev);
 509        pci_set_drvdata(dev, bt);
 510
 511        if ((result = bt878_mem_alloc(bt))) {
 512                printk(KERN_ERR "bt878: failed to allocate memory!\n");
 513                goto fail2;
 514        }
 515
 516        bt878_make_risc(bt);
 517        btwrite(0, BT878_AINT_MASK);
 518        bt878_num++;
 519
 520        return 0;
 521
 522      fail2:
 523        free_irq(bt->irq, bt);
 524      fail1:
 525        release_mem_region(pci_resource_start(bt->dev, 0),
 526                           pci_resource_len(bt->dev, 0));
 527      fail0:
 528        pci_disable_device(dev);
 529        return result;
 530}
 531
 532static void __devexit bt878_remove(struct pci_dev *pci_dev)
 533{
 534        u8 command;
 535        struct bt878 *bt = pci_get_drvdata(pci_dev);
 536
 537        if (bt878_verbose)
 538                printk(KERN_INFO "bt878(%d): unloading\n", bt->nr);
 539
 540        /* turn off all capturing, DMA and IRQs */
 541        btand(~0x13, BT878_AGPIO_DMA_CTL);
 542
 543        /* first disable interrupts before unmapping the memory! */
 544        btwrite(0, BT878_AINT_MASK);
 545        btwrite(~0U, BT878_AINT_STAT);
 546
 547        /* disable PCI bus-mastering */
 548        pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
 549        /* Should this be &=~ ?? */
 550        command &= ~PCI_COMMAND_MASTER;
 551        pci_write_config_byte(bt->dev, PCI_COMMAND, command);
 552
 553        free_irq(bt->irq, bt);
 554        printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
 555        if (bt->bt878_mem)
 556                iounmap(bt->bt878_mem);
 557
 558        release_mem_region(pci_resource_start(bt->dev, 0),
 559                           pci_resource_len(bt->dev, 0));
 560        /* wake up any waiting processes
 561           because shutdown flag is set, no new processes (in this queue)
 562           are expected
 563         */
 564        bt->shutdown = 1;
 565        bt878_mem_free(bt);
 566
 567        pci_set_drvdata(pci_dev, NULL);
 568        pci_disable_device(pci_dev);
 569        return;
 570}
 571
 572static struct pci_driver bt878_pci_driver = {
 573      .name     = "bt878",
 574      .id_table = bt878_pci_tbl,
 575      .probe    = bt878_probe,
 576      .remove   = __devexit_p(bt878_remove),
 577};
 578
 579/*******************************/
 580/* Module management functions */
 581/*******************************/
 582
 583static int __init bt878_init_module(void)
 584{
 585        bt878_num = 0;
 586
 587        printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
 588               (BT878_VERSION_CODE >> 16) & 0xff,
 589               (BT878_VERSION_CODE >> 8) & 0xff,
 590               BT878_VERSION_CODE & 0xff);
 591
 592        return pci_register_driver(&bt878_pci_driver);
 593}
 594
 595static void __exit bt878_cleanup_module(void)
 596{
 597        pci_unregister_driver(&bt878_pci_driver);
 598}
 599
 600module_init(bt878_init_module);
 601module_exit(bt878_cleanup_module);
 602
 603MODULE_LICENSE("GPL");
 604
 605/*
 606 * Local variables:
 607 * c-basic-offset: 8
 608 * End:
 609 */
 610