drivers/media/video/bt8xx/bttv-input.c

   1 /*
   2  *
   3  * Copyright (c) 2003 Gerd Knorr
   4  * Copyright (c) 2003 Pavel Machek
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/input.h>
  27
  28 #include "bttv.h"
  29 #include "bttvp.h"
  30
  31
  32 static int debug;
  33 module_param(debug, int, 0644);    /* debug level (0,1,2) */
  34 static int repeat_delay = 500;
  35 module_param(repeat_delay, int, 0644);
  36 static int repeat_period = 33;
  37 module_param(repeat_period, int, 0644);
  38
  39 #define DEVNAME "bttv-input"
  40
  41 /* ---------------------------------------------------------------------- */
  42
  43 static void ir_handle_key(struct bttv *btv)
  44 {
  45         struct bttv_ir *ir = btv->remote;
  46         u32 gpio,data;
  47
  48         /* read gpio value */
  49         gpio = bttv_gpio_read(&btv->c);
  50         if (ir->polling) {
  51                 if (ir->last_gpio == gpio)
  52                         return;
  53                 ir->last_gpio = gpio;
  54         }
  55
  56         /* extract data */
  57         data = ir_extract_bits(gpio, ir->mask_keycode);
  58         dprintk(KERN_INFO DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
  59                 gpio, data,
  60                 ir->polling               ? "poll"  : "irq",
  61                 (gpio & ir->mask_keydown) ? " down" : "",
  62                 (gpio & ir->mask_keyup)   ? " up"   : "");
  63
  64         if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
  65             (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
  66                 ir_input_keydown(ir->dev,&ir->ir,data,data);
  67         } else {
  68                 ir_input_nokey(ir->dev,&ir->ir);
  69         }
  70
  71 }
  72
  73 void bttv_input_irq(struct bttv *btv)
  74 {
  75         struct bttv_ir *ir = btv->remote;
  76
  77         if (!ir->polling)
  78                 ir_handle_key(btv);
  79 }
  80
  81 static void bttv_input_timer(unsigned long data)
  82 {
  83         struct bttv *btv = (struct bttv*)data;
  84         struct bttv_ir *ir = btv->remote;
  85         unsigned long timeout;
  86
  87         ir_handle_key(btv);
  88         timeout = jiffies + (ir->polling * HZ / 1000);
  89         mod_timer(&ir->timer, timeout);
  90 }
  91
  92 /* ---------------------------------------------------------------*/
  93
  94 static int rc5_remote_gap = 885;
  95 module_param(rc5_remote_gap, int, 0644);
  96 static int rc5_key_timeout = 200;
  97 module_param(rc5_key_timeout, int, 0644);
  98
  99 #define RC5_START(x)    (((x)>>12)&3)
 100 #define RC5_TOGGLE(x)   (((x)>>11)&1)
 101 #define RC5_ADDR(x)     (((x)>>6)&31)
 102 #define RC5_INSTR(x)    ((x)&63)
 103
 104 /* decode raw bit pattern to RC5 code */
 105 static u32 rc5_decode(unsigned int code)
 106 {
 107         unsigned int org_code = code;
 108         unsigned int pair;
 109         unsigned int rc5 = 0;
 110         int i;
 111
 112         code = (code << 1) | 1;
 113         for (i = 0; i < 14; ++i) {
 114                 pair = code & 0x3;
 115                 code >>= 2;
 116
 117                 rc5 <<= 1;
 118                 switch (pair) {
 119                 case 0:
 120                 case 2:
 121                         break;
 122                 case 1:
 123                         rc5 |= 1;
 124                         break;
 125                 case 3:
 126                         dprintk(KERN_WARNING "bad code: %x\n", org_code);
 127                         return 0;
 128                 }
 129         }
 130         dprintk(KERN_WARNING "code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
 131                 "instr=%x\n", rc5, org_code, RC5_START(rc5),
 132                 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
 133         return rc5;
 134 }
 135
 136 static int bttv_rc5_irq(struct bttv *btv)
 137 {
 138         struct bttv_ir *ir = btv->remote;
 139         struct timeval tv;
 140         u32 gpio;
 141         u32 gap;
 142         unsigned long current_jiffies, timeout;
 143
 144         /* read gpio port */
 145         gpio = bttv_gpio_read(&btv->c);
 146
 147         /* remote IRQ? */
 148         if (!(gpio & 0x20))
 149                 return 0;
 150
 151         /* get time of bit */
 152         current_jiffies = jiffies;
 153         do_gettimeofday(&tv);
 154
 155         /* avoid overflow with gap >1s */
 156         if (tv.tv_sec - ir->base_time.tv_sec > 1) {
 157                 gap = 200000;
 158         } else {
 159                 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
 160                     tv.tv_usec - ir->base_time.tv_usec;
 161         }
 162
 163         /* active code => add bit */
 164         if (ir->active) {
 165                 /* only if in the code (otherwise spurious IRQ or timer
 166                    late) */
 167                 if (ir->last_bit < 28) {
 168                         ir->last_bit = (gap - rc5_remote_gap / 2) /
 169                             rc5_remote_gap;
 170                         ir->code |= 1 << ir->last_bit;
 171                 }
 172                 /* starting new code */
 173         } else {
 174                 ir->active = 1;
 175                 ir->code = 0;
 176                 ir->base_time = tv;
 177                 ir->last_bit = 0;
 178
 179                 timeout = current_jiffies + (500 + 30 * HZ) / 1000;
 180                 mod_timer(&ir->timer_end, timeout);
 181         }
 182
 183         /* toggle GPIO pin 4 to reset the irq */
 184         bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 185         bttv_gpio_write(&btv->c, gpio | (1 << 4));
 186         return 1;
 187 }
 188
 189
 190 static void bttv_rc5_timer_end(unsigned long data)
 191 {
 192         struct bttv_ir *ir = (struct bttv_ir *)data;
 193         struct timeval tv;
 194         unsigned long current_jiffies, timeout;
 195         u32 gap;
 196
 197         /* get time */
 198         current_jiffies = jiffies;
 199         do_gettimeofday(&tv);
 200
 201         /* avoid overflow with gap >1s */
 202         if (tv.tv_sec - ir->base_time.tv_sec > 1) {
 203                 gap = 200000;
 204         } else {
 205                 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
 206                     tv.tv_usec - ir->base_time.tv_usec;
 207         }
 208
 209         /* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
 210         if (gap < 28000) {
 211                 dprintk(KERN_WARNING "spurious timer_end\n");
 212                 return;
 213         }
 214
 215         ir->active = 0;
 216         if (ir->last_bit < 20) {
 217                 /* ignore spurious codes (caused by light/other remotes) */
 218                 dprintk(KERN_WARNING "short code: %x\n", ir->code);
 219         } else {
 220                 u32 rc5 = rc5_decode(ir->code);
 221
 222                 /* two start bits? */
 223                 if (RC5_START(rc5) != 3) {
 224                         dprintk(KERN_WARNING "rc5 start bits invalid: %u\n", RC5_START(rc5));
 225
 226                         /* right address? */
 227                 } else if (RC5_ADDR(rc5) == 0x0) {
 228                         u32 toggle = RC5_TOGGLE(rc5);
 229                         u32 instr = RC5_INSTR(rc5);
 230
 231                         /* Good code, decide if repeat/repress */
 232                         if (toggle != RC5_TOGGLE(ir->last_rc5) ||
 233                             instr != RC5_INSTR(ir->last_rc5)) {
 234                                 dprintk(KERN_WARNING "instruction %x, toggle %x\n", instr,
 235                                         toggle);
 236                                 ir_input_nokey(ir->dev, &ir->ir);
 237                                 ir_input_keydown(ir->dev, &ir->ir, instr,
 238                                                  instr);
 239                         }
 240
 241                         /* Set/reset key-up timer */
 242                         timeout = current_jiffies + (500 + rc5_key_timeout
 243                                                      * HZ) / 1000;
 244                         mod_timer(&ir->timer_keyup, timeout);
 245
 246                         /* Save code for repeat test */
 247                         ir->last_rc5 = rc5;
 248                 }
 249         }
 250 }
 251
 252 static void bttv_rc5_timer_keyup(unsigned long data)
 253 {
 254         struct bttv_ir *ir = (struct bttv_ir *)data;
 255
 256         dprintk(KERN_DEBUG "key released\n");
 257         ir_input_nokey(ir->dev, &ir->ir);
 258 }
 259
 260 /* ---------------------------------------------------------------------- */
 261
 262 int bttv_input_init(struct bttv *btv)
 263 {
 264         struct bttv_ir *ir;
 265         IR_KEYTAB_TYPE *ir_codes = NULL;
 266         struct input_dev *input_dev;
 267         int ir_type = IR_TYPE_OTHER;
 268
 269         if (!btv->has_remote)
 270                 return -ENODEV;
 271
 272         ir = kzalloc(sizeof(*ir),GFP_KERNEL);
 273         input_dev = input_allocate_device();
 274         if (!ir || !input_dev) {
 275                 kfree(ir);
 276                 input_free_device(input_dev);
 277                 return -ENOMEM;
 278         }
 279         memset(ir,0,sizeof(*ir));
 280
 281         /* detect & configure */
 282         switch (btv->c.type) {
 283         case BTTV_BOARD_AVERMEDIA:
 284         case BTTV_BOARD_AVPHONE98:
 285         case BTTV_BOARD_AVERMEDIA98:
 286                 ir_codes         = ir_codes_avermedia;
 287                 ir->mask_keycode = 0xf88000;
 288                 ir->mask_keydown = 0x010000;
 289                 ir->polling      = 50; // ms
 290                 break;
 291
 292         case BTTV_BOARD_AVDVBT_761:
 293         case BTTV_BOARD_AVDVBT_771:
 294                 ir_codes         = ir_codes_avermedia_dvbt;
 295                 ir->mask_keycode = 0x0f00c0;
 296                 ir->mask_keydown = 0x000020;
 297                 ir->polling      = 50; // ms
 298                 break;
 299
 300         case BTTV_BOARD_PXELVWPLTVPAK:
 301                 ir_codes         = ir_codes_pixelview;
 302                 ir->mask_keycode = 0x003e00;
 303                 ir->mask_keyup   = 0x010000;
 304                 ir->polling      = 50; // ms
 305                 break;
 306         case BTTV_BOARD_PV_M4900:
 307         case BTTV_BOARD_PV_BT878P_9B:
 308         case BTTV_BOARD_PV_BT878P_PLUS:
 309                 ir_codes         = ir_codes_pixelview;
 310                 ir->mask_keycode = 0x001f00;
 311                 ir->mask_keyup   = 0x008000;
 312                 ir->polling      = 50; // ms
 313                 break;
 314
 315         case BTTV_BOARD_WINFAST2000:
 316                 ir_codes         = ir_codes_winfast;
 317                 ir->mask_keycode = 0x1f8;
 318                 break;
 319         case BTTV_BOARD_MAGICTVIEW061:
 320         case BTTV_BOARD_MAGICTVIEW063:
 321                 ir_codes         = ir_codes_winfast;
 322                 ir->mask_keycode = 0x0008e000;
 323                 ir->mask_keydown = 0x00200000;
 324                 break;
 325         case BTTV_BOARD_APAC_VIEWCOMP:
 326                 ir_codes         = ir_codes_apac_viewcomp;
 327                 ir->mask_keycode = 0x001f00;
 328                 ir->mask_keyup   = 0x008000;
 329                 ir->polling      = 50; // ms
 330                 break;
 331         case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
 332         case BTTV_BOARD_CONTVFMI:
 333                 ir_codes         = ir_codes_pixelview;
 334                 ir->mask_keycode = 0x001F00;
 335                 ir->mask_keyup   = 0x006000;
 336                 ir->polling      = 50; // ms
 337                 break;
 338         case BTTV_BOARD_NEBULA_DIGITV:
 339                 ir_codes = ir_codes_nebula;
 340                 btv->custom_irq = bttv_rc5_irq;
 341                 ir->rc5_gpio = 1;
 342                 break;
 343         case BTTV_BOARD_MACHTV_MAGICTV:
 344                 ir_codes         = ir_codes_apac_viewcomp;
 345                 ir->mask_keycode = 0x001F00;
 346                 ir->mask_keyup   = 0x004000;
 347                 ir->polling      = 50; /* ms */
 348                 break;
 349         }
 350         if (NULL == ir_codes) {
 351                 dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n",btv->c.type);
 352                 kfree(ir);
 353                 input_free_device(input_dev);
 354                 return -ENODEV;
 355         }
 356
 357         if (ir->rc5_gpio) {
 358                 u32 gpio;
 359                 /* enable remote irq */
 360                 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
 361                 gpio = bttv_gpio_read(&btv->c);
 362                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 363                 bttv_gpio_write(&btv->c, gpio | (1 << 4));
 364         } else {
 365                 /* init hardware-specific stuff */
 366                 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
 367         }
 368
 369         /* init input device */
 370         ir->dev = input_dev;
 371
 372         snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
 373                  btv->c.type);
 374         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
 375                  pci_name(btv->c.pci));
 376
 377         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
 378         input_dev->name = ir->name;
 379         input_dev->phys = ir->phys;
 380         input_dev->id.bustype = BUS_PCI;
 381         input_dev->id.version = 1;
 382         if (btv->c.pci->subsystem_vendor) {
 383                 input_dev->id.vendor  = btv->c.pci->subsystem_vendor;
 384                 input_dev->id.product = btv->c.pci->subsystem_device;
 385         } else {
 386                 input_dev->id.vendor  = btv->c.pci->vendor;
 387                 input_dev->id.product = btv->c.pci->device;
 388         }
 389         input_dev->cdev.dev = &btv->c.pci->dev;
 390
 391         btv->remote = ir;
 392         if (ir->polling) {
 393                 init_timer(&ir->timer);
 394                 ir->timer.function = bttv_input_timer;
 395                 ir->timer.data     = (unsigned long)btv;
 396                 ir->timer.expires  = jiffies + HZ;
 397                 add_timer(&ir->timer);
 398         } else if (ir->rc5_gpio) {
 399                 /* set timer_end for code completion */
 400                 init_timer(&ir->timer_end);
 401                 ir->timer_end.function = bttv_rc5_timer_end;
 402                 ir->timer_end.data = (unsigned long)ir;
 403
 404                 init_timer(&ir->timer_keyup);
 405                 ir->timer_keyup.function = bttv_rc5_timer_keyup;
 406                 ir->timer_keyup.data = (unsigned long)ir;
 407         }
 408
 409         /* all done */
 410         input_register_device(btv->remote->dev);
 411         printk(DEVNAME ": %s detected at %s\n",ir->name,ir->phys);
 412
 413         /* the remote isn't as bouncy as a keyboard */
 414         ir->dev->rep[REP_DELAY] = repeat_delay;
 415         ir->dev->rep[REP_PERIOD] = repeat_period;
 416
 417         return 0;
 418 }
 419
 420 void bttv_input_fini(struct bttv *btv)
 421 {
 422         if (btv->remote == NULL)
 423                 return;
 424
 425         if (btv->remote->polling) {
 426                 del_timer_sync(&btv->remote->timer);
 427                 flush_scheduled_work();
 428         }
 429
 430
 431         if (btv->remote->rc5_gpio) {
 432                 u32 gpio;
 433
 434                 del_timer_sync(&btv->remote->timer_end);
 435                 flush_scheduled_work();
 436
 437                 gpio = bttv_gpio_read(&btv->c);
 438                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 439         }
 440
 441         input_unregister_device(btv->remote->dev);
 442         kfree(btv->remote);
 443         btv->remote = NULL;
 444 }
 445
 446
 447 /*
 448  * Local variables:
 449  * c-basic-offset: 8
 450  * End:
 451  */