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/delay.h>
  27 #include <linux/input.h>
  28 #include <linux/pci.h>
  29 #include <linux/module.h>
  30 #include <linux/moduleparam.h>
  31
  32 #include "cx88.h"
  33 #include <media/ir-common.h>
  34
  35 /* ---------------------------------------------------------------------- */
  36
  37 struct cx88_IR {
  38         struct cx88_core *core;
  39         struct input_dev *input;
  40         struct ir_input_state ir;
  41         char name[32];
  42         char phys[32];
  43
  44         /* sample from gpio pin 16 */
  45         u32 sampling;
  46         u32 samples[16];
  47         int scount;
  48         unsigned long release;
  49
  50         /* poll external decoder */
  51         int polling;
  52         struct work_struct work;
  53         struct timer_list timer;
  54         u32 gpio_addr;
  55         u32 last_gpio;
  56         u32 mask_keycode;
  57         u32 mask_keydown;
  58         u32 mask_keyup;
  59 };
  60
  61 static int ir_debug = 0;
  62 module_param(ir_debug, int, 0644);      /* debug level [IR] */
  63 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
  64
  65 #define ir_dprintk(fmt, arg...) if (ir_debug) \
  66         printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg)
  67
  68 /* ---------------------------------------------------------------------- */
  69
  70 static void cx88_ir_handle_key(struct cx88_IR *ir)
  71 {
  72         struct cx88_core *core = ir->core;
  73         u32 gpio, data, auxgpio;
  74
  75         /* read gpio value */
  76         gpio = cx_read(ir->gpio_addr);
  77         if (core->board == CX88_BOARD_NPGTECH_REALTV_TOP10FM) {
  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         } else
  94                 auxgpio = gpio;
  95
  96         if (ir->polling) {
  97                 if (ir->last_gpio == auxgpio)
  98                         return;
  99                 ir->last_gpio = auxgpio;
 100         }
 101
 102         /* extract data */
 103         data = ir_extract_bits(gpio, ir->mask_keycode);
 104         ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
 105                    gpio, data,
 106                    ir->polling ? "poll" : "irq",
 107                    (gpio & ir->mask_keydown) ? " down" : "",
 108                    (gpio & ir->mask_keyup) ? " up" : "");
 109
 110         if (ir->core->board == CX88_BOARD_NORWOOD_MICRO) {
 111                 u32 gpio_key = cx_read(MO_GP0_IO);
 112
 113                 data = (data << 4) | ((gpio_key & 0xf0) >> 4);
 114
 115                 ir_input_keydown(ir->input, &ir->ir, data, data);
 116                 ir_input_nokey(ir->input, &ir->ir);
 117
 118         } else if (ir->mask_keydown) {
 119                 /* bit set on keydown */
 120                 if (gpio & ir->mask_keydown) {
 121                         ir_input_keydown(ir->input, &ir->ir, data, data);
 122                 } else {
 123                         ir_input_nokey(ir->input, &ir->ir);
 124                 }
 125
 126         } else if (ir->mask_keyup) {
 127                 /* bit cleared on keydown */
 128                 if (0 == (gpio & ir->mask_keyup)) {
 129                         ir_input_keydown(ir->input, &ir->ir, data, data);
 130                 } else {
 131                         ir_input_nokey(ir->input, &ir->ir);
 132                 }
 133
 134         } else {
 135                 /* can't distinguish keydown/up :-/ */
 136                 ir_input_keydown(ir->input, &ir->ir, data, data);
 137                 ir_input_nokey(ir->input, &ir->ir);
 138         }
 139 }
 140
 141 static void ir_timer(unsigned long data)
 142 {
 143         struct cx88_IR *ir = (struct cx88_IR *)data;
 144
 145         schedule_work(&ir->work);
 146 }
 147
 148 static void cx88_ir_work(struct work_struct *work)
 149 {
 150         struct cx88_IR *ir = container_of(work, struct cx88_IR, work);
 151         unsigned long timeout;
 152
 153         cx88_ir_handle_key(ir);
 154         timeout = jiffies + (ir->polling * HZ / 1000);
 155         mod_timer(&ir->timer, timeout);
 156 }
 157
 158 static void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
 159 {
 160         if (ir->polling) {
 161                 INIT_WORK(&ir->work, cx88_ir_work);
 162                 init_timer(&ir->timer);
 163                 ir->timer.function = ir_timer;
 164                 ir->timer.data = (unsigned long)ir;
 165                 schedule_work(&ir->work);
 166         }
 167         if (ir->sampling) {
 168                 core->pci_irqmask |= (1 << 18); /* IR_SMP_INT */
 169                 cx_write(MO_DDS_IO, 0xa80a80);  /* 4 kHz sample rate */
 170                 cx_write(MO_DDSCFG_IO, 0x5);    /* enable */
 171         }
 172 }
 173
 174 static void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
 175 {
 176         if (ir->sampling) {
 177                 cx_write(MO_DDSCFG_IO, 0x0);
 178                 core->pci_irqmask &= ~(1 << 18);
 179         }
 180
 181         if (ir->polling) {
 182                 del_timer_sync(&ir->timer);
 183                 flush_scheduled_work();
 184         }
 185 }
 186
 187 /* ---------------------------------------------------------------------- */
 188
 189 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 190 {
 191         struct cx88_IR *ir;
 192         struct input_dev *input_dev;
 193         IR_KEYTAB_TYPE *ir_codes = NULL;
 194         int ir_type = IR_TYPE_OTHER;
 195         int err = -ENOMEM;
 196
 197         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 198         input_dev = input_allocate_device();
 199         if (!ir || !input_dev)
 200                 goto err_out_free;
 201
 202         ir->input = input_dev;
 203
 204         /* detect & configure */
 205         switch (core->board) {
 206         case CX88_BOARD_DNTV_LIVE_DVB_T:
 207         case CX88_BOARD_KWORLD_DVB_T:
 208         case CX88_BOARD_KWORLD_DVB_T_CX22702:
 209                 ir_codes = ir_codes_dntv_live_dvb_t;
 210                 ir->gpio_addr = MO_GP1_IO;
 211                 ir->mask_keycode = 0x1f;
 212                 ir->mask_keyup = 0x60;
 213                 ir->polling = 50; /* ms */
 214                 break;
 215         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 216                 ir_codes = ir_codes_cinergy_1400;
 217                 ir_type = IR_TYPE_PD;
 218                 ir->sampling = 0xeb04; /* address */
 219                 break;
 220         case CX88_BOARD_HAUPPAUGE:
 221         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 222         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 223         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 224         case CX88_BOARD_HAUPPAUGE_HVR1100:
 225         case CX88_BOARD_HAUPPAUGE_HVR1300:
 226         case CX88_BOARD_HAUPPAUGE_HVR3000:
 227                 ir_codes = ir_codes_hauppauge_new;
 228                 ir_type = IR_TYPE_RC5;
 229                 ir->sampling = 1;
 230                 break;
 231         case CX88_BOARD_WINFAST_DTV2000H:
 232                 ir_codes = ir_codes_winfast;
 233                 ir->gpio_addr = MO_GP0_IO;
 234                 ir->mask_keycode = 0x8f8;
 235                 ir->mask_keyup = 0x100;
 236                 ir->polling = 50; /* ms */
 237                 break;
 238         case CX88_BOARD_WINFAST2000XP_EXPERT:
 239                 ir_codes = ir_codes_winfast;
 240                 ir->gpio_addr = MO_GP0_IO;
 241                 ir->mask_keycode = 0x8f8;
 242                 ir->mask_keyup = 0x100;
 243                 ir->polling = 1; /* ms */
 244                 break;
 245         case CX88_BOARD_IODATA_GVBCTV7E:
 246                 ir_codes = ir_codes_iodata_bctv7e;
 247                 ir->gpio_addr = MO_GP0_IO;
 248                 ir->mask_keycode = 0xfd;
 249                 ir->mask_keydown = 0x02;
 250                 ir->polling = 5; /* ms */
 251                 break;
 252         case CX88_BOARD_PROLINK_PLAYTVPVR:
 253         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 254                 ir_codes = ir_codes_pixelview;
 255                 ir->gpio_addr = MO_GP1_IO;
 256                 ir->mask_keycode = 0x1f;
 257                 ir->mask_keyup = 0x80;
 258                 ir->polling = 1; /* ms */
 259                 break;
 260         case CX88_BOARD_KWORLD_LTV883:
 261                 ir_codes = ir_codes_pixelview;
 262                 ir->gpio_addr = MO_GP1_IO;
 263                 ir->mask_keycode = 0x1f;
 264                 ir->mask_keyup = 0x60;
 265                 ir->polling = 1; /* ms */
 266                 break;
 267         case CX88_BOARD_ADSTECH_DVB_T_PCI:
 268                 ir_codes = ir_codes_adstech_dvb_t_pci;
 269                 ir->gpio_addr = MO_GP1_IO;
 270                 ir->mask_keycode = 0xbf;
 271                 ir->mask_keyup = 0x40;
 272                 ir->polling = 50; /* ms */
 273                 break;
 274         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 275                 ir_codes = ir_codes_msi_tvanywhere;
 276                 ir->gpio_addr = MO_GP1_IO;
 277                 ir->mask_keycode = 0x1f;
 278                 ir->mask_keyup = 0x40;
 279                 ir->polling = 1; /* ms */
 280                 break;
 281         case CX88_BOARD_AVERTV_303:
 282         case CX88_BOARD_AVERTV_STUDIO_303:
 283                 ir_codes         = ir_codes_avertv_303;
 284                 ir->gpio_addr    = MO_GP2_IO;
 285                 ir->mask_keycode = 0xfb;
 286                 ir->mask_keydown = 0x02;
 287                 ir->polling      = 50; /* ms */
 288                 break;
 289         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 290                 ir_codes = ir_codes_dntv_live_dvbt_pro;
 291                 ir_type = IR_TYPE_PD;
 292                 ir->sampling = 0xff00; /* address */
 293                 break;
 294         case CX88_BOARD_NORWOOD_MICRO:
 295                 ir_codes         = ir_codes_norwood;
 296                 ir->gpio_addr    = MO_GP1_IO;
 297                 ir->mask_keycode = 0x0e;
 298                 ir->mask_keyup   = 0x80;
 299                 ir->polling      = 50; /* ms */
 300                 break;
 301         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 302                 ir_codes = ir_codes_npgtech;
 303                 ir->gpio_addr = MO_GP0_IO;
 304                 ir->mask_keycode = 0xfa;
 305                 ir->polling = 50; /* ms */
 306                 break;
 307         }
 308
 309         if (NULL == ir_codes) {
 310                 err = -ENODEV;
 311                 goto err_out_free;
 312         }
 313
 314         /* init input device */
 315         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
 316                  cx88_boards[core->board].name);
 317         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
 318
 319         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
 320         input_dev->name = ir->name;
 321         input_dev->phys = ir->phys;
 322         input_dev->id.bustype = BUS_PCI;
 323         input_dev->id.version = 1;
 324         if (pci->subsystem_vendor) {
 325                 input_dev->id.vendor = pci->subsystem_vendor;
 326                 input_dev->id.product = pci->subsystem_device;
 327         } else {
 328                 input_dev->id.vendor = pci->vendor;
 329                 input_dev->id.product = pci->device;
 330         }
 331         input_dev->cdev.dev = &pci->dev;
 332         /* record handles to ourself */
 333         ir->core = core;
 334         core->ir = ir;
 335
 336         cx88_ir_start(core, ir);
 337
 338         /* all done */
 339         err = input_register_device(ir->input);
 340         if (err)
 341                 goto err_out_stop;
 342
 343         return 0;
 344
 345  err_out_stop:
 346         cx88_ir_stop(core, ir);
 347         core->ir = NULL;
 348  err_out_free:
 349         input_free_device(input_dev);
 350         kfree(ir);
 351         return err;
 352 }
 353
 354 int cx88_ir_fini(struct cx88_core *core)
 355 {
 356         struct cx88_IR *ir = core->ir;
 357
 358         /* skip detach on non attached boards */
 359         if (NULL == ir)
 360                 return 0;
 361
 362         cx88_ir_stop(core, ir);
 363         input_unregister_device(ir->input);
 364         kfree(ir);
 365
 366         /* done */
 367         core->ir = NULL;
 368         return 0;
 369 }
 370
 371 /* ---------------------------------------------------------------------- */
 372
 373 void cx88_ir_irq(struct cx88_core *core)
 374 {
 375         struct cx88_IR *ir = core->ir;
 376         u32 samples, ircode;
 377         int i;
 378
 379         if (NULL == ir)
 380                 return;
 381         if (!ir->sampling)
 382                 return;
 383
 384         samples = cx_read(MO_SAMPLE_IO);
 385         if (0 != samples && 0xffffffff != samples) {
 386                 /* record sample data */
 387                 if (ir->scount < ARRAY_SIZE(ir->samples))
 388                         ir->samples[ir->scount++] = samples;
 389                 return;
 390         }
 391         if (!ir->scount) {
 392                 /* nothing to sample */
 393                 if (ir->ir.keypressed && time_after(jiffies, ir->release))
 394                         ir_input_nokey(ir->input, &ir->ir);
 395                 return;
 396         }
 397
 398         /* have a complete sample */
 399         if (ir->scount < ARRAY_SIZE(ir->samples))
 400                 ir->samples[ir->scount++] = samples;
 401         for (i = 0; i < ir->scount; i++)
 402                 ir->samples[i] = ~ir->samples[i];
 403         if (ir_debug)
 404                 ir_dump_samples(ir->samples, ir->scount);
 405
 406         /* decode it */
 407         switch (core->board) {
 408         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 409         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 410                 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
 411
 412                 if (ircode == 0xffffffff) { /* decoding error */
 413                         ir_dprintk("pulse distance decoding error\n");
 414                         break;
 415                 }
 416
 417                 ir_dprintk("pulse distance decoded: %x\n", ircode);
 418
 419                 if (ircode == 0) { /* key still pressed */
 420                         ir_dprintk("pulse distance decoded repeat code\n");
 421                         ir->release = jiffies + msecs_to_jiffies(120);
 422                         break;
 423                 }
 424
 425                 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
 426                         ir_dprintk("pulse distance decoded wrong address\n");
 427                         break;
 428                 }
 429
 430                 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
 431                         ir_dprintk("pulse distance decoded wrong check sum\n");
 432                         break;
 433                 }
 434
 435                 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0x7f);
 436
 437                 ir_input_keydown(ir->input, &ir->ir, (ircode >> 16) & 0x7f, (ircode >> 16) & 0xff);
 438                 ir->release = jiffies + msecs_to_jiffies(120);
 439                 break;
 440         case CX88_BOARD_HAUPPAUGE:
 441         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 442         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 443         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 444         case CX88_BOARD_HAUPPAUGE_HVR1100:
 445         case CX88_BOARD_HAUPPAUGE_HVR1300:
 446         case CX88_BOARD_HAUPPAUGE_HVR3000:
 447                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 448                 ir_dprintk("biphase decoded: %x\n", ircode);
 449                 if ((ircode & 0xfffff000) != 0x3000)
 450                         break;
 451                 ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);
 452                 ir->release = jiffies + msecs_to_jiffies(120);
 453                 break;
 454         }
 455
 456         ir->scount = 0;
 457         return;
 458 }
 459
 460 /* ---------------------------------------------------------------------- */
 461
 462 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 463 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 464 MODULE_LICENSE("GPL");
 465 /*
 466  * Local variables:
 467  * c-basic-offset: 8
 468  * End:
 469  */