drivers/media/pci/pt1/pt1.c

   1 /*
   2  * driver for Earthsoft PT1/PT2
   3  *
   4  * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
   5  *
   6  * based on pt1dvr - http://pt1dvr.sourceforge.jp/
   7  *      by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/slab.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/pci.h>
  29 #include <linux/kthread.h>
  30 #include <linux/freezer.h>
  31 #include <linux/ratelimit.h>
  32
  33 #include "dvbdev.h"
  34 #include "dvb_demux.h"
  35 #include "dmxdev.h"
  36 #include "dvb_net.h"
  37 #include "dvb_frontend.h"
  38
  39 #include "va1j5jf8007t.h"
  40 #include "va1j5jf8007s.h"
  41
  42 #define DRIVER_NAME "earth-pt1"
  43
  44 #define PT1_PAGE_SHIFT 12
  45 #define PT1_PAGE_SIZE (1 << PT1_PAGE_SHIFT)
  46 #define PT1_NR_UPACKETS 1024
  47 #define PT1_NR_BUFS 511
  48
  49 struct pt1_buffer_page {
  50         __le32 upackets[PT1_NR_UPACKETS];
  51 };
  52
  53 struct pt1_table_page {
  54         __le32 next_pfn;
  55         __le32 buf_pfns[PT1_NR_BUFS];
  56 };
  57
  58 struct pt1_buffer {
  59         struct pt1_buffer_page *page;
  60         dma_addr_t addr;
  61 };
  62
  63 struct pt1_table {
  64         struct pt1_table_page *page;
  65         dma_addr_t addr;
  66         struct pt1_buffer bufs[PT1_NR_BUFS];
  67 };
  68
  69 #define PT1_NR_ADAPS 4
  70
  71 struct pt1_adapter;
  72
  73 struct pt1 {
  74         struct pci_dev *pdev;
  75         void __iomem *regs;
  76         struct i2c_adapter i2c_adap;
  77         int i2c_running;
  78         struct pt1_adapter *adaps[PT1_NR_ADAPS];
  79         struct pt1_table *tables;
  80         struct task_struct *kthread;
  81         int table_index;
  82         int buf_index;
  83
  84         struct mutex lock;
  85         int power;
  86         int reset;
  87 };
  88
  89 struct pt1_adapter {
  90         struct pt1 *pt1;
  91         int index;
  92
  93         u8 *buf;
  94         int upacket_count;
  95         int packet_count;
  96         int st_count;
  97
  98         struct dvb_adapter adap;
  99         struct dvb_demux demux;
 100         int users;
 101         struct dmxdev dmxdev;
 102         struct dvb_frontend *fe;
 103         int (*orig_set_voltage)(struct dvb_frontend *fe,
 104                                 enum fe_sec_voltage voltage);
 105         int (*orig_sleep)(struct dvb_frontend *fe);
 106         int (*orig_init)(struct dvb_frontend *fe);
 107
 108         enum fe_sec_voltage voltage;
 109         int sleep;
 110 };
 111
 112 static void pt1_write_reg(struct pt1 *pt1, int reg, u32 data)
 113 {
 114         writel(data, pt1->regs + reg * 4);
 115 }
 116
 117 static u32 pt1_read_reg(struct pt1 *pt1, int reg)
 118 {
 119         return readl(pt1->regs + reg * 4);
 120 }
 121
 122 static int pt1_nr_tables = 8;
 123 module_param_named(nr_tables, pt1_nr_tables, int, 0);
 124
 125 static void pt1_increment_table_count(struct pt1 *pt1)
 126 {
 127         pt1_write_reg(pt1, 0, 0x00000020);
 128 }
 129
 130 static void pt1_init_table_count(struct pt1 *pt1)
 131 {
 132         pt1_write_reg(pt1, 0, 0x00000010);
 133 }
 134
 135 static void pt1_register_tables(struct pt1 *pt1, u32 first_pfn)
 136 {
 137         pt1_write_reg(pt1, 5, first_pfn);
 138         pt1_write_reg(pt1, 0, 0x0c000040);
 139 }
 140
 141 static void pt1_unregister_tables(struct pt1 *pt1)
 142 {
 143         pt1_write_reg(pt1, 0, 0x08080000);
 144 }
 145
 146 static int pt1_sync(struct pt1 *pt1)
 147 {
 148         int i;
 149         for (i = 0; i < 57; i++) {
 150                 if (pt1_read_reg(pt1, 0) & 0x20000000)
 151                         return 0;
 152                 pt1_write_reg(pt1, 0, 0x00000008);
 153         }
 154         dev_err(&pt1->pdev->dev, "could not sync\n");
 155         return -EIO;
 156 }
 157
 158 static u64 pt1_identify(struct pt1 *pt1)
 159 {
 160         int i;
 161         u64 id;
 162         id = 0;
 163         for (i = 0; i < 57; i++) {
 164                 id |= (u64)(pt1_read_reg(pt1, 0) >> 30 & 1) << i;
 165                 pt1_write_reg(pt1, 0, 0x00000008);
 166         }
 167         return id;
 168 }
 169
 170 static int pt1_unlock(struct pt1 *pt1)
 171 {
 172         int i;
 173         pt1_write_reg(pt1, 0, 0x00000008);
 174         for (i = 0; i < 3; i++) {
 175                 if (pt1_read_reg(pt1, 0) & 0x80000000)
 176                         return 0;
 177                 schedule_timeout_uninterruptible((HZ + 999) / 1000);
 178         }
 179         dev_err(&pt1->pdev->dev, "could not unlock\n");
 180         return -EIO;
 181 }
 182
 183 static int pt1_reset_pci(struct pt1 *pt1)
 184 {
 185         int i;
 186         pt1_write_reg(pt1, 0, 0x01010000);
 187         pt1_write_reg(pt1, 0, 0x01000000);
 188         for (i = 0; i < 10; i++) {
 189                 if (pt1_read_reg(pt1, 0) & 0x00000001)
 190                         return 0;
 191                 schedule_timeout_uninterruptible((HZ + 999) / 1000);
 192         }
 193         dev_err(&pt1->pdev->dev, "could not reset PCI\n");
 194         return -EIO;
 195 }
 196
 197 static int pt1_reset_ram(struct pt1 *pt1)
 198 {
 199         int i;
 200         pt1_write_reg(pt1, 0, 0x02020000);
 201         pt1_write_reg(pt1, 0, 0x02000000);
 202         for (i = 0; i < 10; i++) {
 203                 if (pt1_read_reg(pt1, 0) & 0x00000002)
 204                         return 0;
 205                 schedule_timeout_uninterruptible((HZ + 999) / 1000);
 206         }
 207         dev_err(&pt1->pdev->dev, "could not reset RAM\n");
 208         return -EIO;
 209 }
 210
 211 static int pt1_do_enable_ram(struct pt1 *pt1)
 212 {
 213         int i, j;
 214         u32 status;
 215         status = pt1_read_reg(pt1, 0) & 0x00000004;
 216         pt1_write_reg(pt1, 0, 0x00000002);
 217         for (i = 0; i < 10; i++) {
 218                 for (j = 0; j < 1024; j++) {
 219                         if ((pt1_read_reg(pt1, 0) & 0x00000004) != status)
 220                                 return 0;
 221                 }
 222                 schedule_timeout_uninterruptible((HZ + 999) / 1000);
 223         }
 224         dev_err(&pt1->pdev->dev, "could not enable RAM\n");
 225         return -EIO;
 226 }
 227
 228 static int pt1_enable_ram(struct pt1 *pt1)
 229 {
 230         int i, ret;
 231         int phase;
 232         schedule_timeout_uninterruptible((HZ + 999) / 1000);
 233         phase = pt1->pdev->device == 0x211a ? 128 : 166;
 234         for (i = 0; i < phase; i++) {
 235                 ret = pt1_do_enable_ram(pt1);
 236                 if (ret < 0)
 237                         return ret;
 238         }
 239         return 0;
 240 }
 241
 242 static void pt1_disable_ram(struct pt1 *pt1)
 243 {
 244         pt1_write_reg(pt1, 0, 0x0b0b0000);
 245 }
 246
 247 static void pt1_set_stream(struct pt1 *pt1, int index, int enabled)
 248 {
 249         pt1_write_reg(pt1, 2, 1 << (index + 8) | enabled << index);
 250 }
 251
 252 static void pt1_init_streams(struct pt1 *pt1)
 253 {
 254         int i;
 255         for (i = 0; i < PT1_NR_ADAPS; i++)
 256                 pt1_set_stream(pt1, i, 0);
 257 }
 258
 259 static int pt1_filter(struct pt1 *pt1, struct pt1_buffer_page *page)
 260 {
 261         u32 upacket;
 262         int i;
 263         int index;
 264         struct pt1_adapter *adap;
 265         int offset;
 266         u8 *buf;
 267         int sc;
 268
 269         if (!page->upackets[PT1_NR_UPACKETS - 1])
 270                 return 0;
 271
 272         for (i = 0; i < PT1_NR_UPACKETS; i++) {
 273                 upacket = le32_to_cpu(page->upackets[i]);
 274                 index = (upacket >> 29) - 1;
 275                 if (index < 0 || index >=  PT1_NR_ADAPS)
 276                         continue;
 277
 278                 adap = pt1->adaps[index];
 279                 if (upacket >> 25 & 1)
 280                         adap->upacket_count = 0;
 281                 else if (!adap->upacket_count)
 282                         continue;
 283
 284                 if (upacket >> 24 & 1)
 285                         printk_ratelimited(KERN_INFO "earth-pt1: device buffer overflowing. table[%d] buf[%d]\n",
 286                                 pt1->table_index, pt1->buf_index);
 287                 sc = upacket >> 26 & 0x7;
 288                 if (adap->st_count != -1 && sc != ((adap->st_count + 1) & 0x7))
 289                         printk_ratelimited(KERN_INFO "earth-pt1: data loss in streamID(adapter)[%d]\n",
 290                                            index);
 291                 adap->st_count = sc;
 292
 293                 buf = adap->buf;
 294                 offset = adap->packet_count * 188 + adap->upacket_count * 3;
 295                 buf[offset] = upacket >> 16;
 296                 buf[offset + 1] = upacket >> 8;
 297                 if (adap->upacket_count != 62)
 298                         buf[offset + 2] = upacket;
 299
 300                 if (++adap->upacket_count >= 63) {
 301                         adap->upacket_count = 0;
 302                         if (++adap->packet_count >= 21) {
 303                                 dvb_dmx_swfilter_packets(&adap->demux, buf, 21);
 304                                 adap->packet_count = 0;
 305                         }
 306                 }
 307         }
 308
 309         page->upackets[PT1_NR_UPACKETS - 1] = 0;
 310         return 1;
 311 }
 312
 313 static int pt1_thread(void *data)
 314 {
 315         struct pt1 *pt1;
 316         struct pt1_buffer_page *page;
 317
 318         pt1 = data;
 319         set_freezable();
 320
 321         while (!kthread_should_stop()) {
 322                 try_to_freeze();
 323
 324                 page = pt1->tables[pt1->table_index].bufs[pt1->buf_index].page;
 325                 if (!pt1_filter(pt1, page)) {
 326                         schedule_timeout_interruptible((HZ + 999) / 1000);
 327                         continue;
 328                 }
 329
 330                 if (++pt1->buf_index >= PT1_NR_BUFS) {
 331                         pt1_increment_table_count(pt1);
 332                         pt1->buf_index = 0;
 333                         if (++pt1->table_index >= pt1_nr_tables)
 334                                 pt1->table_index = 0;
 335                 }
 336         }
 337
 338         return 0;
 339 }
 340
 341 static void pt1_free_page(struct pt1 *pt1, void *page, dma_addr_t addr)
 342 {
 343         dma_free_coherent(&pt1->pdev->dev, PT1_PAGE_SIZE, page, addr);
 344 }
 345
 346 static void *pt1_alloc_page(struct pt1 *pt1, dma_addr_t *addrp, u32 *pfnp)
 347 {
 348         void *page;
 349         dma_addr_t addr;
 350
 351         page = dma_alloc_coherent(&pt1->pdev->dev, PT1_PAGE_SIZE, &addr,
 352                                   GFP_KERNEL);
 353         if (page == NULL)
 354                 return NULL;
 355
 356         BUG_ON(addr & (PT1_PAGE_SIZE - 1));
 357         BUG_ON(addr >> PT1_PAGE_SHIFT >> 31 >> 1);
 358
 359         *addrp = addr;
 360         *pfnp = addr >> PT1_PAGE_SHIFT;
 361         return page;
 362 }
 363
 364 static void pt1_cleanup_buffer(struct pt1 *pt1, struct pt1_buffer *buf)
 365 {
 366         pt1_free_page(pt1, buf->page, buf->addr);
 367 }
 368
 369 static int
 370 pt1_init_buffer(struct pt1 *pt1, struct pt1_buffer *buf,  u32 *pfnp)
 371 {
 372         struct pt1_buffer_page *page;
 373         dma_addr_t addr;
 374
 375         page = pt1_alloc_page(pt1, &addr, pfnp);
 376         if (page == NULL)
 377                 return -ENOMEM;
 378
 379         page->upackets[PT1_NR_UPACKETS - 1] = 0;
 380
 381         buf->page = page;
 382         buf->addr = addr;
 383         return 0;
 384 }
 385
 386 static void pt1_cleanup_table(struct pt1 *pt1, struct pt1_table *table)
 387 {
 388         int i;
 389
 390         for (i = 0; i < PT1_NR_BUFS; i++)
 391                 pt1_cleanup_buffer(pt1, &table->bufs[i]);
 392
 393         pt1_free_page(pt1, table->page, table->addr);
 394 }
 395
 396 static int
 397 pt1_init_table(struct pt1 *pt1, struct pt1_table *table, u32 *pfnp)
 398 {
 399         struct pt1_table_page *page;
 400         dma_addr_t addr;
 401         int i, ret;
 402         u32 buf_pfn;
 403
 404         page = pt1_alloc_page(pt1, &addr, pfnp);
 405         if (page == NULL)
 406                 return -ENOMEM;
 407
 408         for (i = 0; i < PT1_NR_BUFS; i++) {
 409                 ret = pt1_init_buffer(pt1, &table->bufs[i], &buf_pfn);
 410                 if (ret < 0)
 411                         goto err;
 412
 413                 page->buf_pfns[i] = cpu_to_le32(buf_pfn);
 414         }
 415
 416         pt1_increment_table_count(pt1);
 417         table->page = page;
 418         table->addr = addr;
 419         return 0;
 420
 421 err:
 422         while (i--)
 423                 pt1_cleanup_buffer(pt1, &table->bufs[i]);
 424
 425         pt1_free_page(pt1, page, addr);
 426         return ret;
 427 }
 428
 429 static void pt1_cleanup_tables(struct pt1 *pt1)
 430 {
 431         struct pt1_table *tables;
 432         int i;
 433
 434         tables = pt1->tables;
 435         pt1_unregister_tables(pt1);
 436
 437         for (i = 0; i < pt1_nr_tables; i++)
 438                 pt1_cleanup_table(pt1, &tables[i]);
 439
 440         vfree(tables);
 441 }
 442
 443 static int pt1_init_tables(struct pt1 *pt1)
 444 {
 445         struct pt1_table *tables;
 446         int i, ret;
 447         u32 first_pfn, pfn;
 448
 449         tables = vmalloc(sizeof(struct pt1_table) * pt1_nr_tables);
 450         if (tables == NULL)
 451                 return -ENOMEM;
 452
 453         pt1_init_table_count(pt1);
 454
 455         i = 0;
 456         if (pt1_nr_tables) {
 457                 ret = pt1_init_table(pt1, &tables[0], &first_pfn);
 458                 if (ret)
 459                         goto err;
 460                 i++;
 461         }
 462
 463         while (i < pt1_nr_tables) {
 464                 ret = pt1_init_table(pt1, &tables[i], &pfn);
 465                 if (ret)
 466                         goto err;
 467                 tables[i - 1].page->next_pfn = cpu_to_le32(pfn);
 468                 i++;
 469         }
 470
 471         tables[pt1_nr_tables - 1].page->next_pfn = cpu_to_le32(first_pfn);
 472
 473         pt1_register_tables(pt1, first_pfn);
 474         pt1->tables = tables;
 475         return 0;
 476
 477 err:
 478         while (i--)
 479                 pt1_cleanup_table(pt1, &tables[i]);
 480
 481         vfree(tables);
 482         return ret;
 483 }
 484
 485 static int pt1_start_polling(struct pt1 *pt1)
 486 {
 487         int ret = 0;
 488
 489         mutex_lock(&pt1->lock);
 490         if (!pt1->kthread) {
 491                 pt1->kthread = kthread_run(pt1_thread, pt1, "earth-pt1");
 492                 if (IS_ERR(pt1->kthread)) {
 493                         ret = PTR_ERR(pt1->kthread);
 494                         pt1->kthread = NULL;
 495                 }
 496         }
 497         mutex_unlock(&pt1->lock);
 498         return ret;
 499 }
 500
 501 static int pt1_start_feed(struct dvb_demux_feed *feed)
 502 {
 503         struct pt1_adapter *adap;
 504         adap = container_of(feed->demux, struct pt1_adapter, demux);
 505         if (!adap->users++) {
 506                 int ret;
 507
 508                 ret = pt1_start_polling(adap->pt1);
 509                 if (ret)
 510                         return ret;
 511                 pt1_set_stream(adap->pt1, adap->index, 1);
 512         }
 513         return 0;
 514 }
 515
 516 static void pt1_stop_polling(struct pt1 *pt1)
 517 {
 518         int i, count;
 519
 520         mutex_lock(&pt1->lock);
 521         for (i = 0, count = 0; i < PT1_NR_ADAPS; i++)
 522                 count += pt1->adaps[i]->users;
 523
 524         if (count == 0 && pt1->kthread) {
 525                 kthread_stop(pt1->kthread);
 526                 pt1->kthread = NULL;
 527         }
 528         mutex_unlock(&pt1->lock);
 529 }
 530
 531 static int pt1_stop_feed(struct dvb_demux_feed *feed)
 532 {
 533         struct pt1_adapter *adap;
 534         adap = container_of(feed->demux, struct pt1_adapter, demux);
 535         if (!--adap->users) {
 536                 pt1_set_stream(adap->pt1, adap->index, 0);
 537                 pt1_stop_polling(adap->pt1);
 538         }
 539         return 0;
 540 }
 541
 542 static void
 543 pt1_update_power(struct pt1 *pt1)
 544 {
 545         int bits;
 546         int i;
 547         struct pt1_adapter *adap;
 548         static const int sleep_bits[] = {
 549                 1 << 4,
 550                 1 << 6 | 1 << 7,
 551                 1 << 5,
 552                 1 << 6 | 1 << 8,
 553         };
 554
 555         bits = pt1->power | !pt1->reset << 3;
 556         mutex_lock(&pt1->lock);
 557         for (i = 0; i < PT1_NR_ADAPS; i++) {
 558                 adap = pt1->adaps[i];
 559                 switch (adap->voltage) {
 560                 case SEC_VOLTAGE_13: /* actually 11V */
 561                         bits |= 1 << 1;
 562                         break;
 563                 case SEC_VOLTAGE_18: /* actually 15V */
 564                         bits |= 1 << 1 | 1 << 2;
 565                         break;
 566                 default:
 567                         break;
 568                 }
 569
 570                 /* XXX: The bits should be changed depending on adap->sleep. */
 571                 bits |= sleep_bits[i];
 572         }
 573         pt1_write_reg(pt1, 1, bits);
 574         mutex_unlock(&pt1->lock);
 575 }
 576
 577 static int pt1_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage)
 578 {
 579         struct pt1_adapter *adap;
 580
 581         adap = container_of(fe->dvb, struct pt1_adapter, adap);
 582         adap->voltage = voltage;
 583         pt1_update_power(adap->pt1);
 584
 585         if (adap->orig_set_voltage)
 586                 return adap->orig_set_voltage(fe, voltage);
 587         else
 588                 return 0;
 589 }
 590
 591 static int pt1_sleep(struct dvb_frontend *fe)
 592 {
 593         struct pt1_adapter *adap;
 594
 595         adap = container_of(fe->dvb, struct pt1_adapter, adap);
 596         adap->sleep = 1;
 597         pt1_update_power(adap->pt1);
 598
 599         if (adap->orig_sleep)
 600                 return adap->orig_sleep(fe);
 601         else
 602                 return 0;
 603 }
 604
 605 static int pt1_wakeup(struct dvb_frontend *fe)
 606 {
 607         struct pt1_adapter *adap;
 608
 609         adap = container_of(fe->dvb, struct pt1_adapter, adap);
 610         adap->sleep = 0;
 611         pt1_update_power(adap->pt1);
 612         schedule_timeout_uninterruptible((HZ + 999) / 1000);
 613
 614         if (adap->orig_init)
 615                 return adap->orig_init(fe);
 616         else
 617                 return 0;
 618 }
 619
 620 static void pt1_free_adapter(struct pt1_adapter *adap)
 621 {
 622         adap->demux.dmx.close(&adap->demux.dmx);
 623         dvb_dmxdev_release(&adap->dmxdev);
 624         dvb_dmx_release(&adap->demux);
 625         dvb_unregister_adapter(&adap->adap);
 626         free_page((unsigned long)adap->buf);
 627         kfree(adap);
 628 }
 629
 630 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 631
 632 static struct pt1_adapter *
 633 pt1_alloc_adapter(struct pt1 *pt1)
 634 {
 635         struct pt1_adapter *adap;
 636         void *buf;
 637         struct dvb_adapter *dvb_adap;
 638         struct dvb_demux *demux;
 639         struct dmxdev *dmxdev;
 640         int ret;
 641
 642         adap = kzalloc(sizeof(struct pt1_adapter), GFP_KERNEL);
 643         if (!adap) {
 644                 ret = -ENOMEM;
 645                 goto err;
 646         }
 647
 648         adap->pt1 = pt1;
 649
 650         adap->voltage = SEC_VOLTAGE_OFF;
 651         adap->sleep = 1;
 652
 653         buf = (u8 *)__get_free_page(GFP_KERNEL);
 654         if (!buf) {
 655                 ret = -ENOMEM;
 656                 goto err_kfree;
 657         }
 658
 659         adap->buf = buf;
 660         adap->upacket_count = 0;
 661         adap->packet_count = 0;
 662         adap->st_count = -1;
 663
 664         dvb_adap = &adap->adap;
 665         dvb_adap->priv = adap;
 666         ret = dvb_register_adapter(dvb_adap, DRIVER_NAME, THIS_MODULE,
 667                                    &pt1->pdev->dev, adapter_nr);
 668         if (ret < 0)
 669                 goto err_free_page;
 670
 671         demux = &adap->demux;
 672         demux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 673         demux->priv = adap;
 674         demux->feednum = 256;
 675         demux->filternum = 256;
 676         demux->start_feed = pt1_start_feed;
 677         demux->stop_feed = pt1_stop_feed;
 678         demux->write_to_decoder = NULL;
 679         ret = dvb_dmx_init(demux);
 680         if (ret < 0)
 681                 goto err_unregister_adapter;
 682
 683         dmxdev = &adap->dmxdev;
 684         dmxdev->filternum = 256;
 685         dmxdev->demux = &demux->dmx;
 686         dmxdev->capabilities = 0;
 687         ret = dvb_dmxdev_init(dmxdev, dvb_adap);
 688         if (ret < 0)
 689                 goto err_dmx_release;
 690
 691         return adap;
 692
 693 err_dmx_release:
 694         dvb_dmx_release(demux);
 695 err_unregister_adapter:
 696         dvb_unregister_adapter(dvb_adap);
 697 err_free_page:
 698         free_page((unsigned long)buf);
 699 err_kfree:
 700         kfree(adap);
 701 err:
 702         return ERR_PTR(ret);
 703 }
 704
 705 static void pt1_cleanup_adapters(struct pt1 *pt1)
 706 {
 707         int i;
 708         for (i = 0; i < PT1_NR_ADAPS; i++)
 709                 pt1_free_adapter(pt1->adaps[i]);
 710 }
 711
 712 static int pt1_init_adapters(struct pt1 *pt1)
 713 {
 714         int i;
 715         struct pt1_adapter *adap;
 716         int ret;
 717
 718         for (i = 0; i < PT1_NR_ADAPS; i++) {
 719                 adap = pt1_alloc_adapter(pt1);
 720                 if (IS_ERR(adap)) {
 721                         ret = PTR_ERR(adap);
 722                         goto err;
 723                 }
 724
 725                 adap->index = i;
 726                 pt1->adaps[i] = adap;
 727         }
 728         return 0;
 729
 730 err:
 731         while (i--)
 732                 pt1_free_adapter(pt1->adaps[i]);
 733
 734         return ret;
 735 }
 736
 737 static void pt1_cleanup_frontend(struct pt1_adapter *adap)
 738 {
 739         dvb_unregister_frontend(adap->fe);
 740 }
 741
 742 static int pt1_init_frontend(struct pt1_adapter *adap, struct dvb_frontend *fe)
 743 {
 744         int ret;
 745
 746         adap->orig_set_voltage = fe->ops.set_voltage;
 747         adap->orig_sleep = fe->ops.sleep;
 748         adap->orig_init = fe->ops.init;
 749         fe->ops.set_voltage = pt1_set_voltage;
 750         fe->ops.sleep = pt1_sleep;
 751         fe->ops.init = pt1_wakeup;
 752
 753         ret = dvb_register_frontend(&adap->adap, fe);
 754         if (ret < 0)
 755                 return ret;
 756
 757         adap->fe = fe;
 758         return 0;
 759 }
 760
 761 static void pt1_cleanup_frontends(struct pt1 *pt1)
 762 {
 763         int i;
 764         for (i = 0; i < PT1_NR_ADAPS; i++)
 765                 pt1_cleanup_frontend(pt1->adaps[i]);
 766 }
 767
 768 struct pt1_config {
 769         struct va1j5jf8007s_config va1j5jf8007s_config;
 770         struct va1j5jf8007t_config va1j5jf8007t_config;
 771 };
 772
 773 static const struct pt1_config pt1_configs[2] = {
 774         {
 775                 {
 776                         .demod_address = 0x1b,
 777                         .frequency = VA1J5JF8007S_20MHZ,
 778                 },
 779                 {
 780                         .demod_address = 0x1a,
 781                         .frequency = VA1J5JF8007T_20MHZ,
 782                 },
 783         }, {
 784                 {
 785                         .demod_address = 0x19,
 786                         .frequency = VA1J5JF8007S_20MHZ,
 787                 },
 788                 {
 789                         .demod_address = 0x18,
 790                         .frequency = VA1J5JF8007T_20MHZ,
 791                 },
 792         },
 793 };
 794
 795 static const struct pt1_config pt2_configs[2] = {
 796         {
 797                 {
 798                         .demod_address = 0x1b,
 799                         .frequency = VA1J5JF8007S_25MHZ,
 800                 },
 801                 {
 802                         .demod_address = 0x1a,
 803                         .frequency = VA1J5JF8007T_25MHZ,
 804                 },
 805         }, {
 806                 {
 807                         .demod_address = 0x19,
 808                         .frequency = VA1J5JF8007S_25MHZ,
 809                 },
 810                 {
 811                         .demod_address = 0x18,
 812                         .frequency = VA1J5JF8007T_25MHZ,
 813                 },
 814         },
 815 };
 816
 817 static int pt1_init_frontends(struct pt1 *pt1)
 818 {
 819         int i, j;
 820         struct i2c_adapter *i2c_adap;
 821         const struct pt1_config *configs, *config;
 822         struct dvb_frontend *fe[4];
 823         int ret;
 824
 825         i = 0;
 826         j = 0;
 827
 828         i2c_adap = &pt1->i2c_adap;
 829         configs = pt1->pdev->device == 0x211a ? pt1_configs : pt2_configs;
 830         do {
 831                 config = &configs[i / 2];
 832
 833                 fe[i] = va1j5jf8007s_attach(&config->va1j5jf8007s_config,
 834                                             i2c_adap);
 835                 if (!fe[i]) {
 836                         ret = -ENODEV; /* This does not sound nice... */
 837                         goto err;
 838                 }
 839                 i++;
 840
 841                 fe[i] = va1j5jf8007t_attach(&config->va1j5jf8007t_config,
 842                                             i2c_adap);
 843                 if (!fe[i]) {
 844                         ret = -ENODEV;
 845                         goto err;
 846                 }
 847                 i++;
 848
 849                 ret = va1j5jf8007s_prepare(fe[i - 2]);
 850                 if (ret < 0)
 851                         goto err;
 852
 853                 ret = va1j5jf8007t_prepare(fe[i - 1]);
 854                 if (ret < 0)
 855                         goto err;
 856
 857         } while (i < 4);
 858
 859         do {
 860                 ret = pt1_init_frontend(pt1->adaps[j], fe[j]);
 861                 if (ret < 0)
 862                         goto err;
 863         } while (++j < 4);
 864
 865         return 0;
 866
 867 err:
 868         while (i-- > j)
 869                 fe[i]->ops.release(fe[i]);
 870
 871         while (j--)
 872                 dvb_unregister_frontend(fe[j]);
 873
 874         return ret;
 875 }
 876
 877 static void pt1_i2c_emit(struct pt1 *pt1, int addr, int busy, int read_enable,
 878                          int clock, int data, int next_addr)
 879 {
 880         pt1_write_reg(pt1, 4, addr << 18 | busy << 13 | read_enable << 12 |
 881                       !clock << 11 | !data << 10 | next_addr);
 882 }
 883
 884 static void pt1_i2c_write_bit(struct pt1 *pt1, int addr, int *addrp, int data)
 885 {
 886         pt1_i2c_emit(pt1, addr,     1, 0, 0, data, addr + 1);
 887         pt1_i2c_emit(pt1, addr + 1, 1, 0, 1, data, addr + 2);
 888         pt1_i2c_emit(pt1, addr + 2, 1, 0, 0, data, addr + 3);
 889         *addrp = addr + 3;
 890 }
 891
 892 static void pt1_i2c_read_bit(struct pt1 *pt1, int addr, int *addrp)
 893 {
 894         pt1_i2c_emit(pt1, addr,     1, 0, 0, 1, addr + 1);
 895         pt1_i2c_emit(pt1, addr + 1, 1, 0, 1, 1, addr + 2);
 896         pt1_i2c_emit(pt1, addr + 2, 1, 1, 1, 1, addr + 3);
 897         pt1_i2c_emit(pt1, addr + 3, 1, 0, 0, 1, addr + 4);
 898         *addrp = addr + 4;
 899 }
 900
 901 static void pt1_i2c_write_byte(struct pt1 *pt1, int addr, int *addrp, int data)
 902 {
 903         int i;
 904         for (i = 0; i < 8; i++)
 905                 pt1_i2c_write_bit(pt1, addr, &addr, data >> (7 - i) & 1);
 906         pt1_i2c_write_bit(pt1, addr, &addr, 1);
 907         *addrp = addr;
 908 }
 909
 910 static void pt1_i2c_read_byte(struct pt1 *pt1, int addr, int *addrp, int last)
 911 {
 912         int i;
 913         for (i = 0; i < 8; i++)
 914                 pt1_i2c_read_bit(pt1, addr, &addr);
 915         pt1_i2c_write_bit(pt1, addr, &addr, last);
 916         *addrp = addr;
 917 }
 918
 919 static void pt1_i2c_prepare(struct pt1 *pt1, int addr, int *addrp)
 920 {
 921         pt1_i2c_emit(pt1, addr,     1, 0, 1, 1, addr + 1);
 922         pt1_i2c_emit(pt1, addr + 1, 1, 0, 1, 0, addr + 2);
 923         pt1_i2c_emit(pt1, addr + 2, 1, 0, 0, 0, addr + 3);
 924         *addrp = addr + 3;
 925 }
 926
 927 static void
 928 pt1_i2c_write_msg(struct pt1 *pt1, int addr, int *addrp, struct i2c_msg *msg)
 929 {
 930         int i;
 931         pt1_i2c_prepare(pt1, addr, &addr);
 932         pt1_i2c_write_byte(pt1, addr, &addr, msg->addr << 1);
 933         for (i = 0; i < msg->len; i++)
 934                 pt1_i2c_write_byte(pt1, addr, &addr, msg->buf[i]);
 935         *addrp = addr;
 936 }
 937
 938 static void
 939 pt1_i2c_read_msg(struct pt1 *pt1, int addr, int *addrp, struct i2c_msg *msg)
 940 {
 941         int i;
 942         pt1_i2c_prepare(pt1, addr, &addr);
 943         pt1_i2c_write_byte(pt1, addr, &addr, msg->addr << 1 | 1);
 944         for (i = 0; i < msg->len; i++)
 945                 pt1_i2c_read_byte(pt1, addr, &addr, i == msg->len - 1);
 946         *addrp = addr;
 947 }
 948
 949 static int pt1_i2c_end(struct pt1 *pt1, int addr)
 950 {
 951         pt1_i2c_emit(pt1, addr,     1, 0, 0, 0, addr + 1);
 952         pt1_i2c_emit(pt1, addr + 1, 1, 0, 1, 0, addr + 2);
 953         pt1_i2c_emit(pt1, addr + 2, 1, 0, 1, 1, 0);
 954
 955         pt1_write_reg(pt1, 0, 0x00000004);
 956         do {
 957                 if (signal_pending(current))
 958                         return -EINTR;
 959                 schedule_timeout_interruptible((HZ + 999) / 1000);
 960         } while (pt1_read_reg(pt1, 0) & 0x00000080);
 961         return 0;
 962 }
 963
 964 static void pt1_i2c_begin(struct pt1 *pt1, int *addrp)
 965 {
 966         int addr;
 967         addr = 0;
 968
 969         pt1_i2c_emit(pt1, addr,     0, 0, 1, 1, addr /* itself */);
 970         addr = addr + 1;
 971
 972         if (!pt1->i2c_running) {
 973                 pt1_i2c_emit(pt1, addr,     1, 0, 1, 1, addr + 1);
 974                 pt1_i2c_emit(pt1, addr + 1, 1, 0, 1, 0, addr + 2);
 975                 addr = addr + 2;
 976                 pt1->i2c_running = 1;
 977         }
 978         *addrp = addr;
 979 }
 980
 981 static int pt1_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 982 {
 983         struct pt1 *pt1;
 984         int i;
 985         struct i2c_msg *msg, *next_msg;
 986         int addr, ret;
 987         u16 len;
 988         u32 word;
 989
 990         pt1 = i2c_get_adapdata(adap);
 991
 992         for (i = 0; i < num; i++) {
 993                 msg = &msgs[i];
 994                 if (msg->flags & I2C_M_RD)
 995                         return -ENOTSUPP;
 996
 997                 if (i + 1 < num)
 998                         next_msg = &msgs[i + 1];
 999                 else
1000                         next_msg = NULL;
1001
1002                 if (next_msg && next_msg->flags & I2C_M_RD) {
1003                         i++;
1004
1005                         len = next_msg->len;
1006                         if (len > 4)
1007                                 return -ENOTSUPP;
1008
1009                         pt1_i2c_begin(pt1, &addr);
1010                         pt1_i2c_write_msg(pt1, addr, &addr, msg);
1011                         pt1_i2c_read_msg(pt1, addr, &addr, next_msg);
1012                         ret = pt1_i2c_end(pt1, addr);
1013                         if (ret < 0)
1014                                 return ret;
1015
1016                         word = pt1_read_reg(pt1, 2);
1017                         while (len--) {
1018                                 next_msg->buf[len] = word;
1019                                 word >>= 8;
1020                         }
1021                 } else {
1022                         pt1_i2c_begin(pt1, &addr);
1023                         pt1_i2c_write_msg(pt1, addr, &addr, msg);
1024                         ret = pt1_i2c_end(pt1, addr);
1025                         if (ret < 0)
1026                                 return ret;
1027                 }
1028         }
1029
1030         return num;
1031 }
1032
1033 static u32 pt1_i2c_func(struct i2c_adapter *adap)
1034 {
1035         return I2C_FUNC_I2C;
1036 }
1037
1038 static const struct i2c_algorithm pt1_i2c_algo = {
1039         .master_xfer = pt1_i2c_xfer,
1040         .functionality = pt1_i2c_func,
1041 };
1042
1043 static void pt1_i2c_wait(struct pt1 *pt1)
1044 {
1045         int i;
1046         for (i = 0; i < 128; i++)
1047                 pt1_i2c_emit(pt1, 0, 0, 0, 1, 1, 0);
1048 }
1049
1050 static void pt1_i2c_init(struct pt1 *pt1)
1051 {
1052         int i;
1053         for (i = 0; i < 1024; i++)
1054                 pt1_i2c_emit(pt1, i, 0, 0, 1, 1, 0);
1055 }
1056
1057 static void pt1_remove(struct pci_dev *pdev)
1058 {
1059         struct pt1 *pt1;
1060         void __iomem *regs;
1061
1062         pt1 = pci_get_drvdata(pdev);
1063         regs = pt1->regs;
1064
1065         if (pt1->kthread)
1066                 kthread_stop(pt1->kthread);
1067         pt1_cleanup_tables(pt1);
1068         pt1_cleanup_frontends(pt1);
1069         pt1_disable_ram(pt1);
1070         pt1->power = 0;
1071         pt1->reset = 1;
1072         pt1_update_power(pt1);
1073         pt1_cleanup_adapters(pt1);
1074         i2c_del_adapter(&pt1->i2c_adap);
1075         kfree(pt1);
1076         pci_iounmap(pdev, regs);
1077         pci_release_regions(pdev);
1078         pci_disable_device(pdev);
1079 }
1080
1081 static int pt1_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1082 {
1083         int ret;
1084         void __iomem *regs;
1085         struct pt1 *pt1;
1086         struct i2c_adapter *i2c_adap;
1087
1088         ret = pci_enable_device(pdev);
1089         if (ret < 0)
1090                 goto err;
1091
1092         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1093         if (ret < 0)
1094                 goto err_pci_disable_device;
1095
1096         pci_set_master(pdev);
1097
1098         ret = pci_request_regions(pdev, DRIVER_NAME);
1099         if (ret < 0)
1100                 goto err_pci_disable_device;
1101
1102         regs = pci_iomap(pdev, 0, 0);
1103         if (!regs) {
1104                 ret = -EIO;
1105                 goto err_pci_release_regions;
1106         }
1107
1108         pt1 = kzalloc(sizeof(struct pt1), GFP_KERNEL);
1109         if (!pt1) {
1110                 ret = -ENOMEM;
1111                 goto err_pci_iounmap;
1112         }
1113
1114         mutex_init(&pt1->lock);
1115         pt1->pdev = pdev;
1116         pt1->regs = regs;
1117         pci_set_drvdata(pdev, pt1);
1118
1119         ret = pt1_init_adapters(pt1);
1120         if (ret < 0)
1121                 goto err_kfree;
1122
1123         mutex_init(&pt1->lock);
1124
1125         pt1->power = 0;
1126         pt1->reset = 1;
1127         pt1_update_power(pt1);
1128
1129         i2c_adap = &pt1->i2c_adap;
1130         i2c_adap->algo = &pt1_i2c_algo;
1131         i2c_adap->algo_data = NULL;
1132         i2c_adap->dev.parent = &pdev->dev;
1133         strcpy(i2c_adap->name, DRIVER_NAME);
1134         i2c_set_adapdata(i2c_adap, pt1);
1135         ret = i2c_add_adapter(i2c_adap);
1136         if (ret < 0)
1137                 goto err_pt1_cleanup_adapters;
1138
1139         pt1_i2c_init(pt1);
1140         pt1_i2c_wait(pt1);
1141
1142         ret = pt1_sync(pt1);
1143         if (ret < 0)
1144                 goto err_i2c_del_adapter;
1145
1146         pt1_identify(pt1);
1147
1148         ret = pt1_unlock(pt1);
1149         if (ret < 0)
1150                 goto err_i2c_del_adapter;
1151
1152         ret = pt1_reset_pci(pt1);
1153         if (ret < 0)
1154                 goto err_i2c_del_adapter;
1155
1156         ret = pt1_reset_ram(pt1);
1157         if (ret < 0)
1158                 goto err_i2c_del_adapter;
1159
1160         ret = pt1_enable_ram(pt1);
1161         if (ret < 0)
1162                 goto err_i2c_del_adapter;
1163
1164         pt1_init_streams(pt1);
1165
1166         pt1->power = 1;
1167         pt1_update_power(pt1);
1168         schedule_timeout_uninterruptible((HZ + 49) / 50);
1169
1170         pt1->reset = 0;
1171         pt1_update_power(pt1);
1172         schedule_timeout_uninterruptible((HZ + 999) / 1000);
1173
1174         ret = pt1_init_frontends(pt1);
1175         if (ret < 0)
1176                 goto err_pt1_disable_ram;
1177
1178         ret = pt1_init_tables(pt1);
1179         if (ret < 0)
1180                 goto err_pt1_cleanup_frontends;
1181
1182         return 0;
1183
1184 err_pt1_cleanup_frontends:
1185         pt1_cleanup_frontends(pt1);
1186 err_pt1_disable_ram:
1187         pt1_disable_ram(pt1);
1188         pt1->power = 0;
1189         pt1->reset = 1;
1190         pt1_update_power(pt1);
1191 err_i2c_del_adapter:
1192         i2c_del_adapter(i2c_adap);
1193 err_pt1_cleanup_adapters:
1194         pt1_cleanup_adapters(pt1);
1195 err_kfree:
1196         kfree(pt1);
1197 err_pci_iounmap:
1198         pci_iounmap(pdev, regs);
1199 err_pci_release_regions:
1200         pci_release_regions(pdev);
1201 err_pci_disable_device:
1202         pci_disable_device(pdev);
1203 err:
1204         return ret;
1205
1206 }
1207
1208 static struct pci_device_id pt1_id_table[] = {
1209         { PCI_DEVICE(0x10ee, 0x211a) },
1210         { PCI_DEVICE(0x10ee, 0x222a) },
1211         { },
1212 };
1213 MODULE_DEVICE_TABLE(pci, pt1_id_table);
1214
1215 static struct pci_driver pt1_driver = {
1216         .name           = DRIVER_NAME,
1217         .probe          = pt1_probe,
1218         .remove         = pt1_remove,
1219         .id_table       = pt1_id_table,
1220 };
1221
1222 module_pci_driver(pt1_driver);
1223
1224 MODULE_AUTHOR("Takahito HIRANO <hiranotaka@zng.info>");
1225 MODULE_DESCRIPTION("Earthsoft PT1/PT2 Driver");
1226 MODULE_LICENSE("GPL");