drivers/media/video/cx88/cx88-input.c

   1 /*
   2  *
   3  * Device driver for GPIO attached remote control interfaces
   4  * on Conexant 2388x based TV/DVB cards.
   5  *
   6  * Copyright (c) 2003 Pavel Machek
   7  * Copyright (c) 2004 Gerd Knorr
   8  * Copyright (c) 2004, 2005 Chris Pascoe
   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  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/hrtimer.h>
  27 #include <linux/input.h>
  28 #include <linux/pci.h>
  29 #include <linux/slab.h>
  30 #include <linux/module.h>
  31
  32 #include "cx88.h"
  33 #include <media/ir-core.h>
  34 #include <media/ir-common.h>
  35
  36 #define MODULE_NAME "cx88xx"
  37
  38 /* ---------------------------------------------------------------------- */
  39
  40 struct cx88_IR {
  41         struct cx88_core *core;
  42         struct input_dev *input;
  43         struct ir_dev_props props;
  44         u64 ir_type;
  45
  46         int users;
  47
  48         char name[32];
  49         char phys[32];
  50
  51         /* sample from gpio pin 16 */
  52         u32 sampling;
  53         u32 samples[16];
  54         int scount;
  55
  56         /* poll external decoder */
  57         int polling;
  58         struct hrtimer timer;
  59         u32 gpio_addr;
  60         u32 last_gpio;
  61         u32 mask_keycode;
  62         u32 mask_keydown;
  63         u32 mask_keyup;
  64 };
  65
  66 static int ir_debug;
  67 module_param(ir_debug, int, 0644);      /* debug level [IR] */
  68 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
  69
  70 #define ir_dprintk(fmt, arg...) if (ir_debug) \
  71         printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg)
  72
  73 /* ---------------------------------------------------------------------- */
  74
  75 static void cx88_ir_handle_key(struct cx88_IR *ir)
  76 {
  77         struct cx88_core *core = ir->core;
  78         u32 gpio, data, auxgpio;
  79
  80         /* read gpio value */
  81         gpio = cx_read(ir->gpio_addr);
  82         switch (core->boardnr) {
  83         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
  84                 /* This board apparently uses a combination of 2 GPIO
  85                    to represent the keys. Additionally, the second GPIO
  86                    can be used for parity.
  87
  88                    Example:
  89
  90                    for key "5"
  91                         gpio = 0x758, auxgpio = 0xe5 or 0xf5
  92                    for key "Power"
  93                         gpio = 0x758, auxgpio = 0xed or 0xfd
  94                  */
  95
  96                 auxgpio = cx_read(MO_GP1_IO);
  97                 /* Take out the parity part */
  98                 gpio=(gpio & 0x7fd) + (auxgpio & 0xef);
  99                 break;
 100         case CX88_BOARD_WINFAST_DTV1000:
 101         case CX88_BOARD_WINFAST_DTV1800H:
 102         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
 103                 gpio = (gpio & 0x6ff) | ((cx_read(MO_GP1_IO) << 8) & 0x900);
 104                 auxgpio = gpio;
 105                 break;
 106         default:
 107                 auxgpio = gpio;
 108         }
 109         if (ir->polling) {
 110                 if (ir->last_gpio == auxgpio)
 111                         return;
 112                 ir->last_gpio = auxgpio;
 113         }
 114
 115         /* extract data */
 116         data = ir_extract_bits(gpio, ir->mask_keycode);
 117         ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
 118                    gpio, data,
 119                    ir->polling ? "poll" : "irq",
 120                    (gpio & ir->mask_keydown) ? " down" : "",
 121                    (gpio & ir->mask_keyup) ? " up" : "");
 122
 123         if (ir->core->boardnr == CX88_BOARD_NORWOOD_MICRO) {
 124                 u32 gpio_key = cx_read(MO_GP0_IO);
 125
 126                 data = (data << 4) | ((gpio_key & 0xf0) >> 4);
 127
 128                 ir_keydown(ir->input, data, 0);
 129
 130         } else if (ir->mask_keydown) {
 131                 /* bit set on keydown */
 132                 if (gpio & ir->mask_keydown)
 133                         ir_keydown(ir->input, data, 0);
 134
 135         } else if (ir->mask_keyup) {
 136                 /* bit cleared on keydown */
 137                 if (0 == (gpio & ir->mask_keyup))
 138                         ir_keydown(ir->input, data, 0);
 139
 140         } else {
 141                 /* can't distinguish keydown/up :-/ */
 142                 ir_keydown(ir->input, data, 0);
 143         }
 144 }
 145
 146 static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer)
 147 {
 148         unsigned long missed;
 149         struct cx88_IR *ir = container_of(timer, struct cx88_IR, timer);
 150
 151         cx88_ir_handle_key(ir);
 152         missed = hrtimer_forward_now(&ir->timer,
 153                                      ktime_set(0, ir->polling * 1000000));
 154         if (missed > 1)
 155                 ir_dprintk("Missed ticks %ld\n", missed - 1);
 156
 157         return HRTIMER_RESTART;
 158 }
 159
 160 static int __cx88_ir_start(void *priv)
 161 {
 162         struct cx88_core *core = priv;
 163         struct cx88_IR *ir;
 164
 165         if (!core || !core->ir)
 166                 return -EINVAL;
 167
 168         ir = core->ir;
 169
 170         if (ir->polling) {
 171                 hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 172                 ir->timer.function = cx88_ir_work;
 173                 hrtimer_start(&ir->timer,
 174                               ktime_set(0, ir->polling * 1000000),
 175                               HRTIMER_MODE_REL);
 176         }
 177         if (ir->sampling) {
 178                 core->pci_irqmask |= PCI_INT_IR_SMPINT;
 179                 cx_write(MO_DDS_IO, 0xa80a80);  /* 4 kHz sample rate */
 180                 cx_write(MO_DDSCFG_IO, 0x5);    /* enable */
 181         }
 182         return 0;
 183 }
 184
 185 static void __cx88_ir_stop(void *priv)
 186 {
 187         struct cx88_core *core = priv;
 188         struct cx88_IR *ir;
 189
 190         if (!core || !core->ir)
 191                 return;
 192
 193         ir = core->ir;
 194         if (ir->sampling) {
 195                 cx_write(MO_DDSCFG_IO, 0x0);
 196                 core->pci_irqmask &= ~PCI_INT_IR_SMPINT;
 197         }
 198
 199         if (ir->polling)
 200                 hrtimer_cancel(&ir->timer);
 201 }
 202
 203 int cx88_ir_start(struct cx88_core *core)
 204 {
 205         if (core->ir->users)
 206                 return __cx88_ir_start(core);
 207
 208         return 0;
 209 }
 210
 211 void cx88_ir_stop(struct cx88_core *core)
 212 {
 213         if (core->ir->users)
 214                 __cx88_ir_stop(core);
 215 }
 216
 217 static int cx88_ir_open(void *priv)
 218 {
 219         struct cx88_core *core = priv;
 220
 221         core->ir->users++;
 222         return __cx88_ir_start(core);
 223 }
 224
 225 static void cx88_ir_close(void *priv)
 226 {
 227         struct cx88_core *core = priv;
 228
 229         core->ir->users--;
 230         if (!core->ir->users)
 231                 __cx88_ir_stop(core);
 232 }
 233
 234 /* ---------------------------------------------------------------------- */
 235
 236 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 237 {
 238         struct cx88_IR *ir;
 239         struct input_dev *input_dev;
 240         char *ir_codes = NULL;
 241         u64 ir_type = IR_TYPE_OTHER;
 242         int err = -ENOMEM;
 243         u32 hardware_mask = 0;  /* For devices with a hardware mask, when
 244                                  * used with a full-code IR table
 245                                  */
 246
 247         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 248         input_dev = input_allocate_device();
 249         if (!ir || !input_dev)
 250                 goto err_out_free;
 251
 252         ir->input = input_dev;
 253
 254         /* detect & configure */
 255         switch (core->boardnr) {
 256         case CX88_BOARD_DNTV_LIVE_DVB_T:
 257         case CX88_BOARD_KWORLD_DVB_T:
 258         case CX88_BOARD_KWORLD_DVB_T_CX22702:
 259                 ir_codes = RC_MAP_DNTV_LIVE_DVB_T;
 260                 ir->gpio_addr = MO_GP1_IO;
 261                 ir->mask_keycode = 0x1f;
 262                 ir->mask_keyup = 0x60;
 263                 ir->polling = 50; /* ms */
 264                 break;
 265         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 266                 ir_codes = RC_MAP_CINERGY_1400;
 267                 ir_type = IR_TYPE_NEC;
 268                 ir->sampling = 0xeb04; /* address */
 269                 break;
 270         case CX88_BOARD_HAUPPAUGE:
 271         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 272         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 273         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 274         case CX88_BOARD_HAUPPAUGE_HVR1100:
 275         case CX88_BOARD_HAUPPAUGE_HVR3000:
 276         case CX88_BOARD_HAUPPAUGE_HVR4000:
 277         case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
 278         case CX88_BOARD_PCHDTV_HD3000:
 279         case CX88_BOARD_PCHDTV_HD5500:
 280         case CX88_BOARD_HAUPPAUGE_IRONLY:
 281                 ir_codes = RC_MAP_HAUPPAUGE_NEW;
 282                 ir_type = IR_TYPE_RC5;
 283                 ir->sampling = 1;
 284                 break;
 285         case CX88_BOARD_WINFAST_DTV2000H:
 286         case CX88_BOARD_WINFAST_DTV2000H_J:
 287         case CX88_BOARD_WINFAST_DTV1800H:
 288                 ir_codes = RC_MAP_WINFAST;
 289                 ir->gpio_addr = MO_GP0_IO;
 290                 ir->mask_keycode = 0x8f8;
 291                 ir->mask_keyup = 0x100;
 292                 ir->polling = 50; /* ms */
 293                 break;
 294         case CX88_BOARD_WINFAST2000XP_EXPERT:
 295         case CX88_BOARD_WINFAST_DTV1000:
 296         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
 297                 ir_codes = RC_MAP_WINFAST;
 298                 ir->gpio_addr = MO_GP0_IO;
 299                 ir->mask_keycode = 0x8f8;
 300                 ir->mask_keyup = 0x100;
 301                 ir->polling = 1; /* ms */
 302                 break;
 303         case CX88_BOARD_IODATA_GVBCTV7E:
 304                 ir_codes = RC_MAP_IODATA_BCTV7E;
 305                 ir->gpio_addr = MO_GP0_IO;
 306                 ir->mask_keycode = 0xfd;
 307                 ir->mask_keydown = 0x02;
 308                 ir->polling = 5; /* ms */
 309                 break;
 310         case CX88_BOARD_PROLINK_PLAYTVPVR:
 311         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 312                 /*
 313                  * It seems that this hardware is paired with NEC extended
 314                  * address 0x866b. So, unfortunately, its usage with other
 315                  * IR's with different address won't work. Still, there are
 316                  * other IR's from the same manufacturer that works, like the
 317                  * 002-T mini RC, provided with newer PV hardware
 318                  */
 319                 ir_codes = RC_MAP_PIXELVIEW_MK12;
 320                 ir->gpio_addr = MO_GP1_IO;
 321                 ir->mask_keyup = 0x80;
 322                 ir->polling = 10; /* ms */
 323                 hardware_mask = 0x3f;   /* Hardware returns only 6 bits from command part */
 324                 break;
 325         case CX88_BOARD_PROLINK_PV_8000GT:
 326         case CX88_BOARD_PROLINK_PV_GLOBAL_XTREME:
 327                 ir_codes = RC_MAP_PIXELVIEW_NEW;
 328                 ir->gpio_addr = MO_GP1_IO;
 329                 ir->mask_keycode = 0x3f;
 330                 ir->mask_keyup = 0x80;
 331                 ir->polling = 1; /* ms */
 332                 break;
 333         case CX88_BOARD_KWORLD_LTV883:
 334                 ir_codes = RC_MAP_PIXELVIEW;
 335                 ir->gpio_addr = MO_GP1_IO;
 336                 ir->mask_keycode = 0x1f;
 337                 ir->mask_keyup = 0x60;
 338                 ir->polling = 1; /* ms */
 339                 break;
 340         case CX88_BOARD_ADSTECH_DVB_T_PCI:
 341                 ir_codes = RC_MAP_ADSTECH_DVB_T_PCI;
 342                 ir->gpio_addr = MO_GP1_IO;
 343                 ir->mask_keycode = 0xbf;
 344                 ir->mask_keyup = 0x40;
 345                 ir->polling = 50; /* ms */
 346                 break;
 347         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 348                 ir_codes = RC_MAP_MSI_TVANYWHERE;
 349                 ir->gpio_addr = MO_GP1_IO;
 350                 ir->mask_keycode = 0x1f;
 351                 ir->mask_keyup = 0x40;
 352                 ir->polling = 1; /* ms */
 353                 break;
 354         case CX88_BOARD_AVERTV_303:
 355         case CX88_BOARD_AVERTV_STUDIO_303:
 356                 ir_codes         = RC_MAP_AVERTV_303;
 357                 ir->gpio_addr    = MO_GP2_IO;
 358                 ir->mask_keycode = 0xfb;
 359                 ir->mask_keydown = 0x02;
 360                 ir->polling      = 50; /* ms */
 361                 break;
 362         case CX88_BOARD_OMICOM_SS4_PCI:
 363         case CX88_BOARD_SATTRADE_ST4200:
 364         case CX88_BOARD_TBS_8920:
 365         case CX88_BOARD_TBS_8910:
 366         case CX88_BOARD_PROF_7300:
 367         case CX88_BOARD_PROF_7301:
 368         case CX88_BOARD_PROF_6200:
 369                 ir_codes = RC_MAP_TBS_NEC;
 370                 ir_type = IR_TYPE_NEC;
 371                 ir->sampling = 0xff00; /* address */
 372                 break;
 373         case CX88_BOARD_TEVII_S460:
 374         case CX88_BOARD_TEVII_S420:
 375                 ir_codes = RC_MAP_TEVII_NEC;
 376                 ir_type = IR_TYPE_NEC;
 377                 ir->sampling = 0xff00; /* address */
 378                 break;
 379         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 380                 ir_codes         = RC_MAP_DNTV_LIVE_DVBT_PRO;
 381                 ir_type          = IR_TYPE_NEC;
 382                 ir->sampling     = 0xff00; /* address */
 383                 break;
 384         case CX88_BOARD_NORWOOD_MICRO:
 385                 ir_codes         = RC_MAP_NORWOOD;
 386                 ir->gpio_addr    = MO_GP1_IO;
 387                 ir->mask_keycode = 0x0e;
 388                 ir->mask_keyup   = 0x80;
 389                 ir->polling      = 50; /* ms */
 390                 break;
 391         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 392                 ir_codes         = RC_MAP_NPGTECH;
 393                 ir->gpio_addr    = MO_GP0_IO;
 394                 ir->mask_keycode = 0xfa;
 395                 ir->polling      = 50; /* ms */
 396                 break;
 397         case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 398                 ir_codes         = RC_MAP_PINNACLE_PCTV_HD;
 399                 ir_type          = IR_TYPE_RC5;
 400                 ir->sampling     = 1;
 401                 break;
 402         case CX88_BOARD_POWERCOLOR_REAL_ANGEL:
 403                 ir_codes         = RC_MAP_POWERCOLOR_REAL_ANGEL;
 404                 ir->gpio_addr    = MO_GP2_IO;
 405                 ir->mask_keycode = 0x7e;
 406                 ir->polling      = 100; /* ms */
 407                 break;
 408         case CX88_BOARD_TWINHAN_VP1027_DVBS:
 409                 ir_codes         = RC_MAP_TWINHAN_VP1027_DVBS;
 410                 ir_type          = IR_TYPE_NEC;
 411                 ir->sampling     = 0xff00; /* address */
 412                 break;
 413         }
 414
 415         if (NULL == ir_codes) {
 416                 err = -ENODEV;
 417                 goto err_out_free;
 418         }
 419
 420         /*
 421          * The usage of mask_keycode were very convenient, due to several
 422          * reasons. Among others, the scancode tables were using the scancode
 423          * as the index elements. So, the less bits it was used, the smaller
 424          * the table were stored. After the input changes, the better is to use
 425          * the full scancodes, since it allows replacing the IR remote by
 426          * another one. Unfortunately, there are still some hardware, like
 427          * Pixelview Ultra Pro, where only part of the scancode is sent via
 428          * GPIO. So, there's no way to get the full scancode. Due to that,
 429          * hardware_mask were introduced here: it represents those hardware
 430          * that has such limits.
 431          */
 432         if (hardware_mask && !ir->mask_keycode)
 433                 ir->mask_keycode = hardware_mask;
 434
 435         /* init input device */
 436         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)", core->board.name);
 437         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
 438
 439         ir->ir_type = ir_type;
 440
 441         input_dev->name = ir->name;
 442         input_dev->phys = ir->phys;
 443         input_dev->id.bustype = BUS_PCI;
 444         input_dev->id.version = 1;
 445         if (pci->subsystem_vendor) {
 446                 input_dev->id.vendor = pci->subsystem_vendor;
 447                 input_dev->id.product = pci->subsystem_device;
 448         } else {
 449                 input_dev->id.vendor = pci->vendor;
 450                 input_dev->id.product = pci->device;
 451         }
 452         input_dev->dev.parent = &pci->dev;
 453         /* record handles to ourself */
 454         ir->core = core;
 455         core->ir = ir;
 456
 457         ir->props.priv = core;
 458         ir->props.open = cx88_ir_open;
 459         ir->props.close = cx88_ir_close;
 460         ir->props.scanmask = hardware_mask;
 461
 462         /* all done */
 463         err = ir_input_register(ir->input, ir_codes, &ir->props, MODULE_NAME);
 464         if (err)
 465                 goto err_out_free;
 466
 467         return 0;
 468
 469  err_out_free:
 470         core->ir = NULL;
 471         kfree(ir);
 472         return err;
 473 }
 474
 475 int cx88_ir_fini(struct cx88_core *core)
 476 {
 477         struct cx88_IR *ir = core->ir;
 478
 479         /* skip detach on non attached boards */
 480         if (NULL == ir)
 481                 return 0;
 482
 483         cx88_ir_stop(core);
 484         ir_input_unregister(ir->input);
 485         kfree(ir);
 486
 487         /* done */
 488         core->ir = NULL;
 489         return 0;
 490 }
 491
 492 /* ---------------------------------------------------------------------- */
 493
 494 void cx88_ir_irq(struct cx88_core *core)
 495 {
 496         struct cx88_IR *ir = core->ir;
 497         u32 samples, ircode;
 498         int i, start, range, toggle, dev, code;
 499
 500         if (NULL == ir)
 501                 return;
 502         if (!ir->sampling)
 503                 return;
 504
 505         samples = cx_read(MO_SAMPLE_IO);
 506         if (0 != samples && 0xffffffff != samples) {
 507                 /* record sample data */
 508                 if (ir->scount < ARRAY_SIZE(ir->samples))
 509                         ir->samples[ir->scount++] = samples;
 510                 return;
 511         }
 512         if (!ir->scount) {
 513                 /* nothing to sample */
 514                 return;
 515         }
 516
 517         /* have a complete sample */
 518         if (ir->scount < ARRAY_SIZE(ir->samples))
 519                 ir->samples[ir->scount++] = samples;
 520         for (i = 0; i < ir->scount; i++)
 521                 ir->samples[i] = ~ir->samples[i];
 522         if (ir_debug)
 523                 ir_dump_samples(ir->samples, ir->scount);
 524
 525         /* decode it */
 526         switch (core->boardnr) {
 527         case CX88_BOARD_TEVII_S460:
 528         case CX88_BOARD_TEVII_S420:
 529         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 530         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 531         case CX88_BOARD_OMICOM_SS4_PCI:
 532         case CX88_BOARD_SATTRADE_ST4200:
 533         case CX88_BOARD_TBS_8920:
 534         case CX88_BOARD_TBS_8910:
 535         case CX88_BOARD_PROF_7300:
 536         case CX88_BOARD_PROF_7301:
 537         case CX88_BOARD_PROF_6200:
 538         case CX88_BOARD_TWINHAN_VP1027_DVBS:
 539                 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
 540
 541                 if (ircode == 0xffffffff) { /* decoding error */
 542                         ir_dprintk("pulse distance decoding error\n");
 543                         break;
 544                 }
 545
 546                 ir_dprintk("pulse distance decoded: %x\n", ircode);
 547
 548                 if (ircode == 0) { /* key still pressed */
 549                         ir_dprintk("pulse distance decoded repeat code\n");
 550                         ir_repeat(ir->input);
 551                         break;
 552                 }
 553
 554                 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
 555                         ir_dprintk("pulse distance decoded wrong address\n");
 556                         break;
 557                 }
 558
 559                 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
 560                         ir_dprintk("pulse distance decoded wrong check sum\n");
 561                         break;
 562                 }
 563
 564                 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0xff);
 565                 ir_keydown(ir->input, (ircode >> 16) & 0xff, 0);
 566                 break;
 567         case CX88_BOARD_HAUPPAUGE:
 568         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 569         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 570         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 571         case CX88_BOARD_HAUPPAUGE_HVR1100:
 572         case CX88_BOARD_HAUPPAUGE_HVR3000:
 573         case CX88_BOARD_HAUPPAUGE_HVR4000:
 574         case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
 575         case CX88_BOARD_PCHDTV_HD3000:
 576         case CX88_BOARD_PCHDTV_HD5500:
 577         case CX88_BOARD_HAUPPAUGE_IRONLY:
 578                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 579                 ir_dprintk("biphase decoded: %x\n", ircode);
 580                 /*
 581                  * RC5 has an extension bit which adds a new range
 582                  * of available codes, this is detected here. Also
 583                  * hauppauge remotes (black/silver) always use
 584                  * specific device ids. If we do not filter the
 585                  * device ids then messages destined for devices
 586                  * such as TVs (id=0) will get through to the
 587                  * device causing mis-fired events.
 588                  */
 589                 /* split rc5 data block ... */
 590                 start = (ircode & 0x2000) >> 13;
 591                 range = (ircode & 0x1000) >> 12;
 592                 toggle= (ircode & 0x0800) >> 11;
 593                 dev   = (ircode & 0x07c0) >> 6;
 594                 code  = (ircode & 0x003f) | ((range << 6) ^ 0x0040);
 595                 if( start != 1)
 596                         /* no key pressed */
 597                         break;
 598                 if ( dev != 0x1e && dev != 0x1f )
 599                         /* not a hauppauge remote */
 600                         break;
 601                 ir_keydown(ir->input, code, toggle);
 602                 break;
 603         case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 604                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 605                 ir_dprintk("biphase decoded: %x\n", ircode);
 606                 if ((ircode & 0xfffff000) != 0x3000)
 607                         break;
 608                 /* Note: bit 0x800 being the toggle is assumed, not checked
 609                    with real hardware  */
 610                 ir_keydown(ir->input, ircode & 0x3f, ircode & 0x0800 ? 1 : 0);
 611                 break;
 612         }
 613
 614         ir->scount = 0;
 615         return;
 616 }
 617
 618
 619 void cx88_i2c_init_ir(struct cx88_core *core)
 620 {
 621         struct i2c_board_info info;
 622         const unsigned short addr_list[] = {
 623                 0x18, 0x6b, 0x71,
 624                 I2C_CLIENT_END
 625         };
 626         const unsigned short *addrp;
 627         /* Instantiate the IR receiver device, if present */
 628         if (0 != core->i2c_rc)
 629                 return;
 630
 631         memset(&info, 0, sizeof(struct i2c_board_info));
 632         strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
 633
 634         /*
 635          * We can't call i2c_new_probed_device() because it uses
 636          * quick writes for probing and at least some RC receiver
 637          * devices only reply to reads.
 638          * Also, Hauppauge XVR needs to be specified, as address 0x71
 639          * conflicts with another remote type used with saa7134
 640          */
 641         for (addrp = addr_list; *addrp != I2C_CLIENT_END; addrp++) {
 642                 info.platform_data = NULL;
 643                 memset(&core->init_data, 0, sizeof(core->init_data));
 644
 645                 if (*addrp == 0x71) {
 646                         /* Hauppauge XVR */
 647                         core->init_data.name = "cx88 Hauppauge XVR remote";
 648                         core->init_data.ir_codes = RC_MAP_HAUPPAUGE_NEW;
 649                         core->init_data.type = IR_TYPE_RC5;
 650                         core->init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
 651
 652                         info.platform_data = &core->init_data;
 653                 }
 654                 if (i2c_smbus_xfer(&core->i2c_adap, *addrp, 0,
 655                                         I2C_SMBUS_READ, 0,
 656                                         I2C_SMBUS_QUICK, NULL) >= 0) {
 657                         info.addr = *addrp;
 658                         i2c_new_device(&core->i2c_adap, &info);
 659                         break;
 660                 }
 661         }
 662 }
 663
 664 /* ---------------------------------------------------------------------- */
 665
 666 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 667 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 668 MODULE_LICENSE("GPL");