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) {
  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+=(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->mask_keydown) {
 111                 /* bit set on keydown */
 112                 if (gpio & ir->mask_keydown) {
 113                         ir_input_keydown(ir->input, &ir->ir, data, data);
 114                 } else {
 115                         ir_input_nokey(ir->input, &ir->ir);
 116                 }
 117
 118         } else if (ir->mask_keyup) {
 119                 /* bit cleared on keydown */
 120                 if (0 == (gpio & ir->mask_keyup)) {
 121                         ir_input_keydown(ir->input, &ir->ir, data, data);
 122                 } else {
 123                         ir_input_nokey(ir->input, &ir->ir);
 124                 }
 125
 126         } else {
 127                 /* can't distinguish keydown/up :-/ */
 128                 ir_input_keydown(ir->input, &ir->ir, data, data);
 129                 ir_input_nokey(ir->input, &ir->ir);
 130         }
 131 }
 132
 133 static void ir_timer(unsigned long data)
 134 {
 135         struct cx88_IR *ir = (struct cx88_IR *)data;
 136
 137         schedule_work(&ir->work);
 138 }
 139
 140 static void cx88_ir_work(void *data)
 141 {
 142         struct cx88_IR *ir = data;
 143         unsigned long timeout;
 144
 145         cx88_ir_handle_key(ir);
 146         timeout = jiffies + (ir->polling * HZ / 1000);
 147         mod_timer(&ir->timer, timeout);
 148 }
 149
 150 /* ---------------------------------------------------------------------- */
 151
 152 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 153 {
 154         struct cx88_IR *ir;
 155         struct input_dev *input_dev;
 156         IR_KEYTAB_TYPE *ir_codes = NULL;
 157         int ir_type = IR_TYPE_OTHER;
 158
 159         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 160         input_dev = input_allocate_device();
 161         if (!ir || !input_dev) {
 162                 kfree(ir);
 163                 input_free_device(input_dev);
 164                 return -ENOMEM;
 165         }
 166
 167         ir->input = input_dev;
 168
 169         /* detect & configure */
 170         switch (core->board) {
 171         case CX88_BOARD_DNTV_LIVE_DVB_T:
 172         case CX88_BOARD_KWORLD_DVB_T:
 173         case CX88_BOARD_KWORLD_DVB_T_CX22702:
 174                 ir_codes = ir_codes_dntv_live_dvb_t;
 175                 ir->gpio_addr = MO_GP1_IO;
 176                 ir->mask_keycode = 0x1f;
 177                 ir->mask_keyup = 0x60;
 178                 ir->polling = 50; /* ms */
 179                 break;
 180         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 181                 ir_codes = ir_codes_cinergy_1400;
 182                 ir_type = IR_TYPE_PD;
 183                 ir->sampling = 0xeb04; /* address */
 184                 break;
 185         case CX88_BOARD_HAUPPAUGE:
 186         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 187         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 188         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 189         case CX88_BOARD_HAUPPAUGE_HVR1100:
 190                 ir_codes = ir_codes_hauppauge_new;
 191                 ir_type = IR_TYPE_RC5;
 192                 ir->sampling = 1;
 193                 break;
 194         case CX88_BOARD_WINFAST2000XP_EXPERT:
 195                 ir_codes = ir_codes_winfast;
 196                 ir->gpio_addr = MO_GP0_IO;
 197                 ir->mask_keycode = 0x8f8;
 198                 ir->mask_keyup = 0x100;
 199                 ir->polling = 1; /* ms */
 200                 break;
 201         case CX88_BOARD_IODATA_GVBCTV7E:
 202                 ir_codes = ir_codes_iodata_bctv7e;
 203                 ir->gpio_addr = MO_GP0_IO;
 204                 ir->mask_keycode = 0xfd;
 205                 ir->mask_keydown = 0x02;
 206                 ir->polling = 5; /* ms */
 207                 break;
 208        case CX88_BOARD_PROLINK_PLAYTVPVR:
 209         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 210                 ir_codes = ir_codes_pixelview;
 211                 ir->gpio_addr = MO_GP1_IO;
 212                 ir->mask_keycode = 0x1f;
 213                 ir->mask_keyup = 0x80;
 214                 ir->polling = 1; /* ms */
 215                 break;
 216         case CX88_BOARD_KWORLD_LTV883:
 217                 ir_codes = ir_codes_pixelview;
 218                 ir->gpio_addr = MO_GP1_IO;
 219                 ir->mask_keycode = 0x1f;
 220                 ir->mask_keyup = 0x60;
 221                 ir->polling = 1; /* ms */
 222                 break;
 223         case CX88_BOARD_ADSTECH_DVB_T_PCI:
 224                 ir_codes = ir_codes_adstech_dvb_t_pci;
 225                 ir->gpio_addr = MO_GP1_IO;
 226                 ir->mask_keycode = 0xbf;
 227                 ir->mask_keyup = 0x40;
 228                 ir->polling = 50; /* ms */
 229                 break;
 230         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 231                 ir_codes = ir_codes_msi_tvanywhere;
 232                 ir->gpio_addr = MO_GP1_IO;
 233                 ir->mask_keycode = 0x1f;
 234                 ir->mask_keyup = 0x40;
 235                 ir->polling = 1; /* ms */
 236                 break;
 237         case CX88_BOARD_AVERTV_303:
 238         case CX88_BOARD_AVERTV_STUDIO_303:
 239                 ir_codes         = ir_codes_avertv_303;
 240                 ir->gpio_addr    = MO_GP2_IO;
 241                 ir->mask_keycode = 0xfb;
 242                 ir->mask_keydown = 0x02;
 243                 ir->polling      = 50; /* ms */
 244                 break;
 245         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 246                 ir_codes = ir_codes_dntv_live_dvbt_pro;
 247                 ir_type = IR_TYPE_PD;
 248                 ir->sampling = 0xff00; /* address */
 249                 break;
 250         case CX88_BOARD_NPGTECH_REALTV:
 251                 ir_codes = ir_codes_npgtech;
 252                 ir->gpio_addr = MO_GP0_IO;
 253                 ir->mask_keycode = 0xfa;
 254                 ir->polling = 50; /* ms */
 255                 break;
 256         }
 257
 258         if (NULL == ir_codes) {
 259                 kfree(ir);
 260                 input_free_device(input_dev);
 261                 return -ENODEV;
 262         }
 263
 264         /* init input device */
 265         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
 266                  cx88_boards[core->board].name);
 267         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
 268
 269         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
 270         input_dev->name = ir->name;
 271         input_dev->phys = ir->phys;
 272         input_dev->id.bustype = BUS_PCI;
 273         input_dev->id.version = 1;
 274         if (pci->subsystem_vendor) {
 275                 input_dev->id.vendor = pci->subsystem_vendor;
 276                 input_dev->id.product = pci->subsystem_device;
 277         } else {
 278                 input_dev->id.vendor = pci->vendor;
 279                 input_dev->id.product = pci->device;
 280         }
 281         input_dev->cdev.dev = &pci->dev;
 282         /* record handles to ourself */
 283         ir->core = core;
 284         core->ir = ir;
 285
 286         if (ir->polling) {
 287                 INIT_WORK(&ir->work, cx88_ir_work, ir);
 288                 init_timer(&ir->timer);
 289                 ir->timer.function = ir_timer;
 290                 ir->timer.data = (unsigned long)ir;
 291                 schedule_work(&ir->work);
 292         }
 293         if (ir->sampling) {
 294                 core->pci_irqmask |= (1 << 18); /* IR_SMP_INT */
 295                 cx_write(MO_DDS_IO, 0xa80a80);  /* 4 kHz sample rate */
 296                 cx_write(MO_DDSCFG_IO, 0x5);    /* enable */
 297         }
 298
 299         /* all done */
 300         input_register_device(ir->input);
 301
 302         return 0;
 303 }
 304
 305 int cx88_ir_fini(struct cx88_core *core)
 306 {
 307         struct cx88_IR *ir = core->ir;
 308
 309         /* skip detach on non attached boards */
 310         if (NULL == ir)
 311                 return 0;
 312
 313         if (ir->sampling) {
 314                 cx_write(MO_DDSCFG_IO, 0x0);
 315                 core->pci_irqmask &= ~(1 << 18);
 316         }
 317         if (ir->polling) {
 318                 del_timer(&ir->timer);
 319                 flush_scheduled_work();
 320         }
 321
 322         input_unregister_device(ir->input);
 323         kfree(ir);
 324
 325         /* done */
 326         core->ir = NULL;
 327         return 0;
 328 }
 329
 330 /* ---------------------------------------------------------------------- */
 331
 332 void cx88_ir_irq(struct cx88_core *core)
 333 {
 334         struct cx88_IR *ir = core->ir;
 335         u32 samples, ircode;
 336         int i;
 337
 338         if (NULL == ir)
 339                 return;
 340         if (!ir->sampling)
 341                 return;
 342
 343         samples = cx_read(MO_SAMPLE_IO);
 344         if (0 != samples && 0xffffffff != samples) {
 345                 /* record sample data */
 346                 if (ir->scount < ARRAY_SIZE(ir->samples))
 347                         ir->samples[ir->scount++] = samples;
 348                 return;
 349         }
 350         if (!ir->scount) {
 351                 /* nothing to sample */
 352                 if (ir->ir.keypressed && time_after(jiffies, ir->release))
 353                         ir_input_nokey(ir->input, &ir->ir);
 354                 return;
 355         }
 356
 357         /* have a complete sample */
 358         if (ir->scount < ARRAY_SIZE(ir->samples))
 359                 ir->samples[ir->scount++] = samples;
 360         for (i = 0; i < ir->scount; i++)
 361                 ir->samples[i] = ~ir->samples[i];
 362         if (ir_debug)
 363                 ir_dump_samples(ir->samples, ir->scount);
 364
 365         /* decode it */
 366         switch (core->board) {
 367         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
 368         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 369                 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
 370
 371                 if (ircode == 0xffffffff) { /* decoding error */
 372                         ir_dprintk("pulse distance decoding error\n");
 373                         break;
 374                 }
 375
 376                 ir_dprintk("pulse distance decoded: %x\n", ircode);
 377
 378                 if (ircode == 0) { /* key still pressed */
 379                         ir_dprintk("pulse distance decoded repeat code\n");
 380                         ir->release = jiffies + msecs_to_jiffies(120);
 381                         break;
 382                 }
 383
 384                 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
 385                         ir_dprintk("pulse distance decoded wrong address\n");
 386                         break;
 387                 }
 388
 389                 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
 390                         ir_dprintk("pulse distance decoded wrong check sum\n");
 391                         break;
 392                 }
 393
 394                 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0x7f);
 395
 396                 ir_input_keydown(ir->input, &ir->ir, (ircode >> 16) & 0x7f, (ircode >> 16) & 0xff);
 397                 ir->release = jiffies + msecs_to_jiffies(120);
 398                 break;
 399         case CX88_BOARD_HAUPPAUGE:
 400         case CX88_BOARD_HAUPPAUGE_DVB_T1:
 401         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 402         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 403         case CX88_BOARD_HAUPPAUGE_HVR1100:
 404                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
 405                 ir_dprintk("biphase decoded: %x\n", ircode);
 406                 if ((ircode & 0xfffff000) != 0x3000)
 407                         break;
 408                 ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);
 409                 ir->release = jiffies + msecs_to_jiffies(120);
 410                 break;
 411         }
 412
 413         ir->scount = 0;
 414         return;
 415 }
 416
 417 /* ---------------------------------------------------------------------- */
 418
 419 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 420 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 421 MODULE_LICENSE("GPL");
 422 /*
 423  * Local variables:
 424  * c-basic-offset: 8
 425  * End:
 426  */