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
 152         cx88_ir_handle_key(ir);
 153         mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
 154 }
 155
 156 static void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
 157 {
 158         if (ir->polling) {
 159                 setup_timer(&ir->timer, ir_timer, (unsigned long)ir);
 160                 INIT_WORK(&ir->work, cx88_ir_work);
 161                 schedule_work(&ir->work);
 162         }
 163         if (ir->sampling) {
 164                 core->pci_irqmask |= (1 << 18); /* IR_SMP_INT */
 165                 cx_write(MO_DDS_IO, 0xa80a80);  /* 4 kHz sample rate */
 166                 cx_write(MO_DDSCFG_IO, 0x5);    /* enable */
 167         }
 168 }
 169
 170 static void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
 171 {
 172         if (ir->sampling) {
 173                 cx_write(MO_DDSCFG_IO, 0x0);
 174                 core->pci_irqmask &= ~(1 << 18);
 175         }
 176
 177         if (ir->polling) {
 178                 del_timer_sync(&ir->timer);
 179                 flush_scheduled_work();
 180         }
 181 }
 182
 183 /* ---------------------------------------------------------------------- */
 184
 185 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 186 {
 187         struct cx88_IR *ir;
 188         struct input_dev *input_dev;
 189         IR_KEYTAB_TYPE *ir_codes = NULL;
 190         int ir_type = IR_TYPE_OTHER;
 191         int err = -ENOMEM;
 192
 193         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 194         input_dev = input_allocate_device();
 195         if (!ir || !input_dev)
 196                 goto err_out_free;
 197
 198         ir->input = input_dev;
 199
 200         /* detect & configure */
 201         switch (core->board) {
 202         case CX88_BOARD_DNTV_LIVE_DVB_T:
 203         case CX88_BOARD_KWORLD_DVB_T:
 204         case CX88_BOARD_KWORLD_DVB_T_CX22702:
 205                 ir_codes = ir_codes_dntv_live_dvb_t;
 206                 ir->gpio_addr = MO_GP1_IO;
 207                 ir->mask_keycode = 0x1f;
 208                 ir->mask_keyup = 0x60;
 209                 ir->polling = 50; /* ms */
 210                 break;
 211         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 212                 ir_codes = ir_codes_cinergy_1400;
 213                 ir_type = IR_TYPE_PD;
 214                 ir->sampling = 0xeb04; /* address */
 215                 break;
 216         case CX88_BOARD_HAUPPAUGE:
 217         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 218         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 219         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 220         case CX88_BOARD_HAUPPAUGE_HVR1100:
 221         case CX88_BOARD_HAUPPAUGE_HVR1300:
 222         case CX88_BOARD_HAUPPAUGE_HVR3000:
 223                 ir_codes = ir_codes_hauppauge_new;
 224                 ir_type = IR_TYPE_RC5;
 225                 ir->sampling = 1;
 226                 break;
 227         case CX88_BOARD_WINFAST_DTV2000H:
 228                 ir_codes = ir_codes_winfast;
 229                 ir->gpio_addr = MO_GP0_IO;
 230                 ir->mask_keycode = 0x8f8;
 231                 ir->mask_keyup = 0x100;
 232                 ir->polling = 50; /* ms */
 233                 break;
 234         case CX88_BOARD_WINFAST2000XP_EXPERT:
 235                 ir_codes = ir_codes_winfast;
 236                 ir->gpio_addr = MO_GP0_IO;
 237                 ir->mask_keycode = 0x8f8;
 238                 ir->mask_keyup = 0x100;
 239                 ir->polling = 1; /* ms */
 240                 break;
 241         case CX88_BOARD_IODATA_GVBCTV7E:
 242                 ir_codes = ir_codes_iodata_bctv7e;
 243                 ir->gpio_addr = MO_GP0_IO;
 244                 ir->mask_keycode = 0xfd;
 245                 ir->mask_keydown = 0x02;
 246                 ir->polling = 5; /* ms */
 247                 break;
 248         case CX88_BOARD_PROLINK_PLAYTVPVR:
 249         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 250                 ir_codes = ir_codes_pixelview;
 251                 ir->gpio_addr = MO_GP1_IO;
 252                 ir->mask_keycode = 0x1f;
 253                 ir->mask_keyup = 0x80;
 254                 ir->polling = 1; /* ms */
 255                 break;
 256         case CX88_BOARD_KWORLD_LTV883:
 257                 ir_codes = ir_codes_pixelview;
 258                 ir->gpio_addr = MO_GP1_IO;
 259                 ir->mask_keycode = 0x1f;
 260                 ir->mask_keyup = 0x60;
 261                 ir->polling = 1; /* ms */
 262                 break;
 263         case CX88_BOARD_ADSTECH_DVB_T_PCI:
 264                 ir_codes = ir_codes_adstech_dvb_t_pci;
 265                 ir->gpio_addr = MO_GP1_IO;
 266                 ir->mask_keycode = 0xbf;
 267                 ir->mask_keyup = 0x40;
 268                 ir->polling = 50; /* ms */
 269                 break;
 270         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 271                 ir_codes = ir_codes_msi_tvanywhere;
 272                 ir->gpio_addr = MO_GP1_IO;
 273                 ir->mask_keycode = 0x1f;
 274                 ir->mask_keyup = 0x40;
 275                 ir->polling = 1; /* ms */
 276                 break;
 277         case CX88_BOARD_AVERTV_303:
 278         case CX88_BOARD_AVERTV_STUDIO_303:
 279                 ir_codes         = ir_codes_avertv_303;
 280                 ir->gpio_addr    = MO_GP2_IO;
 281                 ir->mask_keycode = 0xfb;
 282                 ir->mask_keydown = 0x02;
 283                 ir->polling      = 50; /* ms */
 284                 break;
 285         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 286                 ir_codes = ir_codes_dntv_live_dvbt_pro;
 287                 ir_type = IR_TYPE_PD;
 288                 ir->sampling = 0xff00; /* address */
 289                 break;
 290         case CX88_BOARD_NORWOOD_MICRO:
 291                 ir_codes         = ir_codes_norwood;
 292                 ir->gpio_addr    = MO_GP1_IO;
 293                 ir->mask_keycode = 0x0e;
 294                 ir->mask_keyup   = 0x80;
 295                 ir->polling      = 50; /* ms */
 296                 break;
 297         case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 298                 ir_codes = ir_codes_npgtech;
 299                 ir->gpio_addr = MO_GP0_IO;
 300                 ir->mask_keycode = 0xfa;
 301                 ir->polling = 50; /* ms */
 302                 break;
 303         }
 304
 305         if (NULL == ir_codes) {
 306                 err = -ENODEV;
 307                 goto err_out_free;
 308         }
 309
 310         /* init input device */
 311         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
 312                  cx88_boards[core->board].name);
 313         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
 314
 315         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
 316         input_dev->name = ir->name;
 317         input_dev->phys = ir->phys;
 318         input_dev->id.bustype = BUS_PCI;
 319         input_dev->id.version = 1;
 320         if (pci->subsystem_vendor) {
 321                 input_dev->id.vendor = pci->subsystem_vendor;
 322                 input_dev->id.product = pci->subsystem_device;
 323         } else {
 324                 input_dev->id.vendor = pci->vendor;
 325                 input_dev->id.product = pci->device;
 326         }
 327         input_dev->dev.parent = &pci->dev;
 328         /* record handles to ourself */
 329         ir->core = core;
 330         core->ir = ir;
 331
 332         cx88_ir_start(core, ir);
 333
 334         /* all done */
 335         err = input_register_device(ir->input);
 336         if (err)
 337                 goto err_out_stop;
 338
 339         return 0;
 340
 341  err_out_stop:
 342         cx88_ir_stop(core, ir);
 343         core->ir = NULL;
 344  err_out_free:
 345         input_free_device(input_dev);
 346         kfree(ir);
 347         return err;
 348 }
 349
 350 int cx88_ir_fini(struct cx88_core *core)
 351 {
 352         struct cx88_IR *ir = core->ir;
 353
 354         /* skip detach on non attached boards */
 355         if (NULL == ir)
 356                 return 0;
 357
 358         cx88_ir_stop(core, ir);
 359         input_unregister_device(ir->input);
 360         kfree(ir);
 361
 362         /* done */
 363         core->ir = NULL;
 364         return 0;
 365 }
 366
 367 /* ---------------------------------------------------------------------- */
 368
 369 void cx88_ir_irq(struct cx88_core *core)
 370 {
 371         struct cx88_IR *ir = core->ir;
 372         u32 samples, ircode;
 373         int i;
 374
 375         if (NULL == ir)
 376                 return;
 377         if (!ir->sampling)
 378                 return;
 379
 380         samples = cx_read(MO_SAMPLE_IO);
 381         if (0 != samples && 0xffffffff != samples) {
 382                 /* record sample data */
 383                 if (ir->scount < ARRAY_SIZE(ir->samples))
 384                         ir->samples[ir->scount++] = samples;
 385                 return;
 386         }
 387         if (!ir->scount) {
 388                 /* nothing to sample */
 389                 if (ir->ir.keypressed && time_after(jiffies, ir->release))
 390                         ir_input_nokey(ir->input, &ir->ir);
 391                 return;
 392         }
 393
 394         /* have a complete sample */
 395         if (ir->scount < ARRAY_SIZE(ir->samples))
 396                 ir->samples[ir->scount++] = samples;
 397         for (i = 0; i < ir->scount; i++)
 398                 ir->samples[i] = ~ir->samples[i];
 399         if (ir_debug)
 400                 ir_dump_samples(ir->samples, ir->scount);
 401
 402         /* decode it */
 403         switch (core->board) {
 404         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 405         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 406                 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
 407
 408                 if (ircode == 0xffffffff) { /* decoding error */
 409                         ir_dprintk("pulse distance decoding error\n");
 410                         break;
 411                 }
 412
 413                 ir_dprintk("pulse distance decoded: %x\n", ircode);
 414
 415                 if (ircode == 0) { /* key still pressed */
 416                         ir_dprintk("pulse distance decoded repeat code\n");
 417                         ir->release = jiffies + msecs_to_jiffies(120);
 418                         break;
 419                 }
 420
 421                 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
 422                         ir_dprintk("pulse distance decoded wrong address\n");
 423                         break;
 424                 }
 425
 426                 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
 427                         ir_dprintk("pulse distance decoded wrong check sum\n");
 428                         break;
 429                 }
 430
 431                 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0x7f);
 432
 433                 ir_input_keydown(ir->input, &ir->ir, (ircode >> 16) & 0x7f, (ircode >> 16) & 0xff);
 434                 ir->release = jiffies + msecs_to_jiffies(120);
 435                 break;
 436         case CX88_BOARD_HAUPPAUGE:
 437         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 438         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 439         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 440         case CX88_BOARD_HAUPPAUGE_HVR1100:
 441         case CX88_BOARD_HAUPPAUGE_HVR1300:
 442         case CX88_BOARD_HAUPPAUGE_HVR3000:
 443                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 444                 ir_dprintk("biphase decoded: %x\n", ircode);
 445                 if ((ircode & 0xfffff000) != 0x3000)
 446                         break;
 447                 ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);
 448                 ir->release = jiffies + msecs_to_jiffies(120);
 449                 break;
 450         }
 451
 452         ir->scount = 0;
 453         return;
 454 }
 455
 456 /* ---------------------------------------------------------------------- */
 457
 458 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 459 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 460 MODULE_LICENSE("GPL");
 461 /*
 462  * Local variables:
 463  * c-basic-offset: 8
 464  * End:
 465  */