root/drivers/media/pci/cx88/cx88-input.c

DEFINITIONS

1. cx88_ir_handle_key
2. cx88_ir_work
3. __cx88_ir_start
4. __cx88_ir_stop
5. cx88_ir_start
6. cx88_ir_stop
7. cx88_ir_open
8. cx88_ir_close
9. cx88_ir_init
10. cx88_ir_fini
11. cx88_ir_irq
12. get_key_pvr2000
13. cx88_i2c_init_ir

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  * Device driver for GPIO attached remote control interfaces
   5  * on Conexant 2388x based TV/DVB cards.
   6  *
   7  * Copyright (c) 2003 Pavel Machek
   8  * Copyright (c) 2004 Gerd Knorr
   9  * Copyright (c) 2004, 2005 Chris Pascoe
  10  */
  11 
  12 #include "cx88.h"
  13 
  14 #include <linux/init.h>
  15 #include <linux/hrtimer.h>
  16 #include <linux/pci.h>
  17 #include <linux/slab.h>
  18 #include <linux/module.h>
  19 
  20 #include <media/rc-core.h>
  21 
  22 #define MODULE_NAME "cx88xx"
  23 
  24 /* ---------------------------------------------------------------------- */
  25 
  26 struct cx88_IR {
  27         struct cx88_core *core;
  28         struct rc_dev *dev;
  29 
  30         int users;
  31 
  32         char name[32];
  33         char phys[32];
  34 
  35         /* sample from gpio pin 16 */
  36         u32 sampling;
  37 
  38         /* poll external decoder */
  39         int polling;
  40         struct hrtimer timer;
  41         u32 gpio_addr;
  42         u32 last_gpio;
  43         u32 mask_keycode;
  44         u32 mask_keydown;
  45         u32 mask_keyup;
  46 };
  47 
  48 static unsigned int ir_samplerate = 4;
  49 module_param(ir_samplerate, uint, 0444);
  50 MODULE_PARM_DESC(ir_samplerate, "IR samplerate in kHz, 1 - 20, default 4");
  51 
  52 static int ir_debug;
  53 module_param(ir_debug, int, 0644);      /* debug level [IR] */
  54 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
  55 
  56 #define ir_dprintk(fmt, arg...) do {                                    \
  57         if (ir_debug)                                                   \
  58                 printk(KERN_DEBUG "%s IR: " fmt, ir->core->name, ##arg);\
  59 } while (0)
  60 
  61 #define dprintk(fmt, arg...) do {                                       \
  62         if (ir_debug)                                                   \
  63                 printk(KERN_DEBUG "cx88 IR: " fmt, ##arg);              \
  64 } while (0)
  65 
  66 /* ---------------------------------------------------------------------- */
  67 
  68 static void cx88_ir_handle_key(struct cx88_IR *ir)
  69 {
  70         struct cx88_core *core = ir->core;
  71         u32 gpio, data, auxgpio;
  72 
  73         /* read gpio value */
  74         gpio = cx_read(ir->gpio_addr);
  75         switch (core->boardnr) {
  76         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
  77                 /*
  78                  * This board apparently uses a combination of 2 GPIO
  79                  * to represent the keys. Additionally, the second GPIO
  80                  * can be used for parity.
  81                  *
  82                  * Example:
  83                  *
  84                  * for key "5"
  85                  *      gpio = 0x758, auxgpio = 0xe5 or 0xf5
  86                  * for key "Power"
  87                  *      gpio = 0x758, auxgpio = 0xed or 0xfd
  88                  */
  89 
  90                 auxgpio = cx_read(MO_GP1_IO);
  91                 /* Take out the parity part */
  92                 gpio = (gpio & 0x7fd) + (auxgpio & 0xef);
  93                 break;
  94         case CX88_BOARD_WINFAST_DTV1000:
  95         case CX88_BOARD_WINFAST_DTV1800H:
  96         case CX88_BOARD_WINFAST_DTV1800H_XC4000:
  97         case CX88_BOARD_WINFAST_DTV2000H_PLUS:
  98         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
  99         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
 100         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
 101                 gpio = (gpio & 0x6ff) | ((cx_read(MO_GP1_IO) << 8) & 0x900);
 102                 auxgpio = gpio;
 103                 break;
 104         default:
 105                 auxgpio = gpio;
 106         }
 107         if (ir->polling) {
 108                 if (ir->last_gpio == auxgpio)
 109                         return;
 110                 ir->last_gpio = auxgpio;
 111         }
 112 
 113         /* extract data */
 114         data = ir_extract_bits(gpio, ir->mask_keycode);
 115         ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
 116                    gpio, data,
 117                    ir->polling ? "poll" : "irq",
 118                    (gpio & ir->mask_keydown) ? " down" : "",
 119                    (gpio & ir->mask_keyup) ? " up" : "");
 120 
 121         if (ir->core->boardnr == CX88_BOARD_NORWOOD_MICRO) {
 122                 u32 gpio_key = cx_read(MO_GP0_IO);
 123 
 124                 data = (data << 4) | ((gpio_key & 0xf0) >> 4);
 125 
 126                 rc_keydown(ir->dev, RC_PROTO_UNKNOWN, data, 0);
 127 
 128         } else if (ir->core->boardnr == CX88_BOARD_PROLINK_PLAYTVPVR ||
 129                    ir->core->boardnr == CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO) {
 130                 /* bit cleared on keydown, NEC scancode, 0xAAAACC, A = 0x866b */
 131                 u16 addr;
 132                 u8 cmd;
 133                 u32 scancode;
 134 
 135                 addr = (data >> 8) & 0xffff;
 136                 cmd  = (data >> 0) & 0x00ff;
 137                 scancode = RC_SCANCODE_NECX(addr, cmd);
 138 
 139                 if (0 == (gpio & ir->mask_keyup))
 140                         rc_keydown_notimeout(ir->dev, RC_PROTO_NECX, scancode,
 141                                              0);
 142                 else
 143                         rc_keyup(ir->dev);
 144 
 145         } else if (ir->mask_keydown) {
 146                 /* bit set on keydown */
 147                 if (gpio & ir->mask_keydown)
 148                         rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
 149                                              0);
 150                 else
 151                         rc_keyup(ir->dev);
 152 
 153         } else if (ir->mask_keyup) {
 154                 /* bit cleared on keydown */
 155                 if (0 == (gpio & ir->mask_keyup))
 156                         rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
 157                                              0);
 158                 else
 159                         rc_keyup(ir->dev);
 160 
 161         } else {
 162                 /* can't distinguish keydown/up :-/ */
 163                 rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data, 0);
 164                 rc_keyup(ir->dev);
 165         }
 166 }
 167 
 168 static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer)
 169 {
 170         u64 missed;
 171         struct cx88_IR *ir = container_of(timer, struct cx88_IR, timer);
 172 
 173         cx88_ir_handle_key(ir);
 174         missed = hrtimer_forward_now(&ir->timer,
 175                                      ktime_set(0, ir->polling * 1000000));
 176         if (missed > 1)
 177                 ir_dprintk("Missed ticks %llu\n", missed - 1);
 178 
 179         return HRTIMER_RESTART;
 180 }
 181 
 182 static int __cx88_ir_start(void *priv)
 183 {
 184         struct cx88_core *core = priv;
 185         struct cx88_IR *ir;
 186 
 187         if (!core || !core->ir)
 188                 return -EINVAL;
 189 
 190         ir = core->ir;
 191 
 192         if (ir->polling) {
 193                 hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 194                 ir->timer.function = cx88_ir_work;
 195                 hrtimer_start(&ir->timer,
 196                               ktime_set(0, ir->polling * 1000000),
 197                               HRTIMER_MODE_REL);
 198         }
 199         if (ir->sampling) {
 200                 core->pci_irqmask |= PCI_INT_IR_SMPINT;
 201                 cx_write(MO_DDS_IO, 0x33F286 * ir_samplerate); /* samplerate */
 202                 cx_write(MO_DDSCFG_IO, 0x5); /* enable */
 203         }
 204         return 0;
 205 }
 206 
 207 static void __cx88_ir_stop(void *priv)
 208 {
 209         struct cx88_core *core = priv;
 210         struct cx88_IR *ir;
 211 
 212         if (!core || !core->ir)
 213                 return;
 214 
 215         ir = core->ir;
 216         if (ir->sampling) {
 217                 cx_write(MO_DDSCFG_IO, 0x0);
 218                 core->pci_irqmask &= ~PCI_INT_IR_SMPINT;
 219         }
 220 
 221         if (ir->polling)
 222                 hrtimer_cancel(&ir->timer);
 223 }
 224 
 225 int cx88_ir_start(struct cx88_core *core)
 226 {
 227         if (core->ir->users)
 228                 return __cx88_ir_start(core);
 229 
 230         return 0;
 231 }
 232 EXPORT_SYMBOL(cx88_ir_start);
 233 
 234 void cx88_ir_stop(struct cx88_core *core)
 235 {
 236         if (core->ir->users)
 237                 __cx88_ir_stop(core);
 238 }
 239 EXPORT_SYMBOL(cx88_ir_stop);
 240 
 241 static int cx88_ir_open(struct rc_dev *rc)
 242 {
 243         struct cx88_core *core = rc->priv;
 244 
 245         core->ir->users++;
 246         return __cx88_ir_start(core);
 247 }
 248 
 249 static void cx88_ir_close(struct rc_dev *rc)
 250 {
 251         struct cx88_core *core = rc->priv;
 252 
 253         core->ir->users--;
 254         if (!core->ir->users)
 255                 __cx88_ir_stop(core);
 256 }
 257 
 258 /* ---------------------------------------------------------------------- */
 259 
 260 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 261 {
 262         struct cx88_IR *ir;
 263         struct rc_dev *dev;
 264         char *ir_codes = NULL;
 265         u64 rc_proto = RC_PROTO_BIT_OTHER;
 266         int err = -ENOMEM;
 267         u32 hardware_mask = 0;  /* For devices with a hardware mask, when
 268                                  * used with a full-code IR table
 269                                  */
 270 
 271         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 272         dev = rc_allocate_device(RC_DRIVER_IR_RAW);
 273         if (!ir || !dev)
 274                 goto err_out_free;
 275 
 276         ir->dev = dev;
 277 
 278         /* detect & configure */
 279         switch (core->boardnr) {
 280         case CX88_BOARD_DNTV_LIVE_DVB_T:
 281         case CX88_BOARD_KWORLD_DVB_T:
 282         case CX88_BOARD_KWORLD_DVB_T_CX22702:
 283                 ir_codes = RC_MAP_DNTV_LIVE_DVB_T;
 284                 ir->gpio_addr = MO_GP1_IO;
 285                 ir->mask_keycode = 0x1f;
 286                 ir->mask_keyup = 0x60;
 287                 ir->polling = 50; /* ms */
 288                 break;
 289         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 290                 ir_codes = RC_MAP_CINERGY_1400;
 291                 ir->sampling = 0xeb04; /* address */
 292                 break;
 293         case CX88_BOARD_HAUPPAUGE:
 294         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 295         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 296         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 297         case CX88_BOARD_HAUPPAUGE_HVR1100:
 298         case CX88_BOARD_HAUPPAUGE_HVR3000:
 299         case CX88_BOARD_HAUPPAUGE_HVR4000:
 300         case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
 301         case CX88_BOARD_PCHDTV_HD3000:
 302         case CX88_BOARD_PCHDTV_HD5500:
 303         case CX88_BOARD_HAUPPAUGE_IRONLY:
 304                 ir_codes = RC_MAP_HAUPPAUGE;
 305                 ir->sampling = 1;
 306                 break;
 307         case CX88_BOARD_WINFAST_DTV2000H:
 308         case CX88_BOARD_WINFAST_DTV2000H_J:
 309         case CX88_BOARD_WINFAST_DTV1800H:
 310         case CX88_BOARD_WINFAST_DTV1800H_XC4000:
 311         case CX88_BOARD_WINFAST_DTV2000H_PLUS:
 312                 ir_codes = RC_MAP_WINFAST;
 313                 ir->gpio_addr = MO_GP0_IO;
 314                 ir->mask_keycode = 0x8f8;
 315                 ir->mask_keyup = 0x100;
 316                 ir->polling = 50; /* ms */
 317                 break;
 318         case CX88_BOARD_WINFAST2000XP_EXPERT:
 319         case CX88_BOARD_WINFAST_DTV1000:
 320         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
 321         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
 322         case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
 323                 ir_codes = RC_MAP_WINFAST;
 324                 ir->gpio_addr = MO_GP0_IO;
 325                 ir->mask_keycode = 0x8f8;
 326                 ir->mask_keyup = 0x100;
 327                 ir->polling = 1; /* ms */
 328                 break;
 329         case CX88_BOARD_IODATA_GVBCTV7E:
 330                 ir_codes = RC_MAP_IODATA_BCTV7E;
 331                 ir->gpio_addr = MO_GP0_IO;
 332                 ir->mask_keycode = 0xfd;
 333                 ir->mask_keydown = 0x02;
 334                 ir->polling = 5; /* ms */
 335                 break;
 336         case CX88_BOARD_PROLINK_PLAYTVPVR:
 337         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 338                 /*
 339                  * It seems that this hardware is paired with NEC extended
 340                  * address 0x866b. So, unfortunately, its usage with other
 341                  * IR's with different address won't work. Still, there are
 342                  * other IR's from the same manufacturer that works, like the
 343                  * 002-T mini RC, provided with newer PV hardware
 344                  */
 345                 ir_codes = RC_MAP_PIXELVIEW_MK12;
 346                 rc_proto = RC_PROTO_BIT_NECX;
 347                 ir->gpio_addr = MO_GP1_IO;
 348                 ir->mask_keyup = 0x80;
 349                 ir->polling = 10; /* ms */
 350                 hardware_mask = 0x3f;   /* Hardware returns only 6 bits from command part */
 351                 break;
 352         case CX88_BOARD_PROLINK_PV_8000GT:
 353         case CX88_BOARD_PROLINK_PV_GLOBAL_XTREME:
 354                 ir_codes = RC_MAP_PIXELVIEW_NEW;
 355                 ir->gpio_addr = MO_GP1_IO;
 356                 ir->mask_keycode = 0x3f;
 357                 ir->mask_keyup = 0x80;
 358                 ir->polling = 1; /* ms */
 359                 break;
 360         case CX88_BOARD_KWORLD_LTV883:
 361                 ir_codes = RC_MAP_PIXELVIEW;
 362                 ir->gpio_addr = MO_GP1_IO;
 363                 ir->mask_keycode = 0x1f;
 364                 ir->mask_keyup = 0x60;
 365                 ir->polling = 1; /* ms */
 366                 break;
 367         case CX88_BOARD_ADSTECH_DVB_T_PCI:
 368                 ir_codes = RC_MAP_ADSTECH_DVB_T_PCI;
 369                 ir->gpio_addr = MO_GP1_IO;
 370                 ir->mask_keycode = 0xbf;
 371                 ir->mask_keyup = 0x40;
 372                 ir->polling = 50; /* ms */
 373                 break;
 374         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 375                 ir_codes = RC_MAP_MSI_TVANYWHERE;
 376                 ir->gpio_addr = MO_GP1_IO;
 377                 ir->mask_keycode = 0x1f;
 378                 ir->mask_keyup = 0x40;
 379                 ir->polling = 1; /* ms */
 380                 break;
 381         case CX88_BOARD_AVERTV_303:
 382         case CX88_BOARD_AVERTV_STUDIO_303:
 383                 ir_codes         = RC_MAP_AVERTV_303;
 384                 ir->gpio_addr    = MO_GP2_IO;
 385                 ir->mask_keycode = 0xfb;
 386                 ir->mask_keydown = 0x02;
 387                 ir->polling      = 50; /* ms */
 388                 break;
 389         case CX88_BOARD_OMICOM_SS4_PCI:
 390         case CX88_BOARD_SATTRADE_ST4200:
 391         case CX88_BOARD_TBS_8920:
 392         case CX88_BOARD_TBS_8910:
 393         case CX88_BOARD_PROF_7300:
 394         case CX88_BOARD_PROF_7301:
 395         case CX88_BOARD_PROF_6200:
 396                 ir_codes = RC_MAP_TBS_NEC;
 397                 ir->sampling = 0xff00; /* address */
 398                 break;
 399         case CX88_BOARD_TEVII_S464:
 400         case CX88_BOARD_TEVII_S460:
 401         case CX88_BOARD_TEVII_S420:
 402                 ir_codes = RC_MAP_TEVII_NEC;
 403                 ir->sampling = 0xff00; /* address */
 404                 break;
 405         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 406                 ir_codes         = RC_MAP_DNTV_LIVE_DVBT_PRO;
 407                 ir->sampling     = 0xff00; /* address */
 408                 break;
 409         case CX88_BOARD_NORWOOD_MICRO:
 410                 ir_codes         = RC_MAP_NORWOOD;
 411                 ir->gpio_addr    = MO_GP1_IO;
 412                 ir->mask_keycode = 0x0e;
 413                 ir->mask_keyup   = 0x80;
 414                 ir->polling      = 50; /* ms */
 415                 break;
 416         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 417                 ir_codes         = RC_MAP_NPGTECH;
 418                 ir->gpio_addr    = MO_GP0_IO;
 419                 ir->mask_keycode = 0xfa;
 420                 ir->polling      = 50; /* ms */
 421                 break;
 422         case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 423                 ir_codes         = RC_MAP_PINNACLE_PCTV_HD;
 424                 ir->sampling     = 1;
 425                 break;
 426         case CX88_BOARD_POWERCOLOR_REAL_ANGEL:
 427                 ir_codes         = RC_MAP_POWERCOLOR_REAL_ANGEL;
 428                 ir->gpio_addr    = MO_GP2_IO;
 429                 ir->mask_keycode = 0x7e;
 430                 ir->polling      = 100; /* ms */
 431                 break;
 432         case CX88_BOARD_TWINHAN_VP1027_DVBS:
 433                 ir_codes         = RC_MAP_TWINHAN_VP1027_DVBS;
 434                 ir->sampling     = 0xff00; /* address */
 435                 break;
 436         }
 437 
 438         if (!ir_codes) {
 439                 err = -ENODEV;
 440                 goto err_out_free;
 441         }
 442 
 443         /*
 444          * The usage of mask_keycode were very convenient, due to several
 445          * reasons. Among others, the scancode tables were using the scancode
 446          * as the index elements. So, the less bits it was used, the smaller
 447          * the table were stored. After the input changes, the better is to use
 448          * the full scancodes, since it allows replacing the IR remote by
 449          * another one. Unfortunately, there are still some hardware, like
 450          * Pixelview Ultra Pro, where only part of the scancode is sent via
 451          * GPIO. So, there's no way to get the full scancode. Due to that,
 452          * hardware_mask were introduced here: it represents those hardware
 453          * that has such limits.
 454          */
 455         if (hardware_mask && !ir->mask_keycode)
 456                 ir->mask_keycode = hardware_mask;
 457 
 458         /* init input device */
 459         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)", core->board.name);
 460         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
 461 
 462         dev->device_name = ir->name;
 463         dev->input_phys = ir->phys;
 464         dev->input_id.bustype = BUS_PCI;
 465         dev->input_id.version = 1;
 466         if (pci->subsystem_vendor) {
 467                 dev->input_id.vendor = pci->subsystem_vendor;
 468                 dev->input_id.product = pci->subsystem_device;
 469         } else {
 470                 dev->input_id.vendor = pci->vendor;
 471                 dev->input_id.product = pci->device;
 472         }
 473         dev->dev.parent = &pci->dev;
 474         dev->map_name = ir_codes;
 475         dev->driver_name = MODULE_NAME;
 476         dev->priv = core;
 477         dev->open = cx88_ir_open;
 478         dev->close = cx88_ir_close;
 479         dev->scancode_mask = hardware_mask;
 480 
 481         if (ir->sampling) {
 482                 dev->timeout = 10 * 1000 * 1000; /* 10 ms */
 483         } else {
 484                 dev->driver_type = RC_DRIVER_SCANCODE;
 485                 dev->allowed_protocols = rc_proto;
 486         }
 487 
 488         ir->core = core;
 489         core->ir = ir;
 490 
 491         /* all done */
 492         err = rc_register_device(dev);
 493         if (err)
 494                 goto err_out_free;
 495 
 496         return 0;
 497 
 498 err_out_free:
 499         rc_free_device(dev);
 500         core->ir = NULL;
 501         kfree(ir);
 502         return err;
 503 }
 504 
 505 int cx88_ir_fini(struct cx88_core *core)
 506 {
 507         struct cx88_IR *ir = core->ir;
 508 
 509         /* skip detach on non attached boards */
 510         if (!ir)
 511                 return 0;
 512 
 513         cx88_ir_stop(core);
 514         rc_unregister_device(ir->dev);
 515         kfree(ir);
 516 
 517         /* done */
 518         core->ir = NULL;
 519         return 0;
 520 }
 521 
 522 /* ---------------------------------------------------------------------- */
 523 
 524 void cx88_ir_irq(struct cx88_core *core)
 525 {
 526         struct cx88_IR *ir = core->ir;
 527         u32 samples;
 528         unsigned int todo, bits;
 529         struct ir_raw_event ev = {};
 530 
 531         if (!ir || !ir->sampling)
 532                 return;
 533 
 534         /*
 535          * Samples are stored in a 32 bit register, oldest sample in
 536          * the msb. A set bit represents space and an unset bit
 537          * represents a pulse.
 538          */
 539         samples = cx_read(MO_SAMPLE_IO);
 540 
 541         if (samples == 0xff && ir->dev->idle)
 542                 return;
 543 
 544         for (todo = 32; todo > 0; todo -= bits) {
 545                 ev.pulse = samples & 0x80000000 ? false : true;
 546                 bits = min(todo, 32U - fls(ev.pulse ? samples : ~samples));
 547                 ev.duration = (bits * (NSEC_PER_SEC / 1000)) / ir_samplerate;
 548                 ir_raw_event_store_with_filter(ir->dev, &ev);
 549                 samples <<= bits;
 550         }
 551         ir_raw_event_handle(ir->dev);
 552 }
 553 
 554 static int get_key_pvr2000(struct IR_i2c *ir, enum rc_proto *protocol,
 555                            u32 *scancode, u8 *toggle)
 556 {
 557         int flags, code;
 558 
 559         /* poll IR chip */
 560         flags = i2c_smbus_read_byte_data(ir->c, 0x10);
 561         if (flags < 0) {
 562                 dprintk("read error\n");
 563                 return 0;
 564         }
 565         /* key pressed ? */
 566         if (0 == (flags & 0x80))
 567                 return 0;
 568 
 569         /* read actual key code */
 570         code = i2c_smbus_read_byte_data(ir->c, 0x00);
 571         if (code < 0) {
 572                 dprintk("read error\n");
 573                 return 0;
 574         }
 575 
 576         dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
 577                 code & 0xff, flags & 0xff);
 578 
 579         *protocol = RC_PROTO_UNKNOWN;
 580         *scancode = code & 0xff;
 581         *toggle = 0;
 582         return 1;
 583 }
 584 
 585 void cx88_i2c_init_ir(struct cx88_core *core)
 586 {
 587         struct i2c_board_info info;
 588         static const unsigned short default_addr_list[] = {
 589                 0x18, 0x6b, 0x71,
 590                 I2C_CLIENT_END
 591         };
 592         static const unsigned short pvr2000_addr_list[] = {
 593                 0x18, 0x1a,
 594                 I2C_CLIENT_END
 595         };
 596         const unsigned short *addr_list = default_addr_list;
 597         const unsigned short *addrp;
 598         /* Instantiate the IR receiver device, if present */
 599         if (core->i2c_rc != 0)
 600                 return;
 601 
 602         memset(&info, 0, sizeof(struct i2c_board_info));
 603         strscpy(info.type, "ir_video", I2C_NAME_SIZE);
 604 
 605         switch (core->boardnr) {
 606         case CX88_BOARD_LEADTEK_PVR2000:
 607                 addr_list = pvr2000_addr_list;
 608                 core->init_data.name = "cx88 Leadtek PVR 2000 remote";
 609                 core->init_data.type = RC_PROTO_BIT_UNKNOWN;
 610                 core->init_data.get_key = get_key_pvr2000;
 611                 core->init_data.ir_codes = RC_MAP_EMPTY;
 612                 break;
 613         }
 614 
 615         /*
 616          * We can't call i2c_new_probed_device() because it uses
 617          * quick writes for probing and at least some RC receiver
 618          * devices only reply to reads.
 619          * Also, Hauppauge XVR needs to be specified, as address 0x71
 620          * conflicts with another remote type used with saa7134
 621          */
 622         for (addrp = addr_list; *addrp != I2C_CLIENT_END; addrp++) {
 623                 info.platform_data = NULL;
 624                 memset(&core->init_data, 0, sizeof(core->init_data));
 625 
 626                 if (*addrp == 0x71) {
 627                         /* Hauppauge Z8F0811 */
 628                         strscpy(info.type, "ir_z8f0811_haup", I2C_NAME_SIZE);
 629                         core->init_data.name = core->board.name;
 630                         core->init_data.ir_codes = RC_MAP_HAUPPAUGE;
 631                         core->init_data.type = RC_PROTO_BIT_RC5 |
 632                                 RC_PROTO_BIT_RC6_MCE | RC_PROTO_BIT_RC6_6A_32;
 633                         core->init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
 634 
 635                         info.platform_data = &core->init_data;
 636                 }
 637                 if (i2c_smbus_xfer(&core->i2c_adap, *addrp, 0,
 638                                    I2C_SMBUS_READ, 0,
 639                                    I2C_SMBUS_QUICK, NULL) >= 0) {
 640                         info.addr = *addrp;
 641                         i2c_new_device(&core->i2c_adap, &info);
 642                         break;
 643                 }
 644         }
 645 }
 646 
 647 /* ---------------------------------------------------------------------- */
 648 
 649 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 650 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 651 MODULE_LICENSE("GPL");