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/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/input.h>
  26 #include <linux/slab.h>
  27
  28 #include "bttv.h"
  29 #include "bttvp.h"
  30
  31
  32 static int ir_debug;
  33 module_param(ir_debug, int, 0644);
  34
  35 static int ir_rc5_remote_gap = 885;
  36 module_param(ir_rc5_remote_gap, int, 0644);
  37
  38 #undef dprintk
  39 #define dprintk(arg...) do {    \
  40         if (ir_debug >= 1)      \
  41                 printk(arg);    \
  42 } while (0)
  43
  44 #define DEVNAME "bttv-input"
  45
  46 #define MODULE_NAME "bttv"
  47
  48 /* ---------------------------------------------------------------------- */
  49
  50 static void ir_handle_key(struct bttv *btv)
  51 {
  52         struct card_ir *ir = btv->remote;
  53         u32 gpio,data;
  54
  55         /* read gpio value */
  56         gpio = bttv_gpio_read(&btv->c);
  57         if (ir->polling) {
  58                 if (ir->last_gpio == gpio)
  59                         return;
  60                 ir->last_gpio = gpio;
  61         }
  62
  63         /* extract data */
  64         data = ir_extract_bits(gpio, ir->mask_keycode);
  65         dprintk(KERN_INFO DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
  66                 gpio, data,
  67                 ir->polling               ? "poll"  : "irq",
  68                 (gpio & ir->mask_keydown) ? " down" : "",
  69                 (gpio & ir->mask_keyup)   ? " up"   : "");
  70
  71         if ((ir->mask_keydown && (gpio & ir->mask_keydown)) ||
  72             (ir->mask_keyup   && !(gpio & ir->mask_keyup))) {
  73                 ir_keydown_notimeout(ir->dev, data, 0);
  74         } else {
  75                 /* HACK: Probably, ir->mask_keydown is missing
  76                    for this board */
  77                 if (btv->c.type == BTTV_BOARD_WINFAST2000)
  78                         ir_keydown_notimeout(ir->dev, data, 0);
  79
  80                 ir_keyup(ir->dev);
  81         }
  82 }
  83
  84 static void ir_enltv_handle_key(struct bttv *btv)
  85 {
  86         struct card_ir *ir = btv->remote;
  87         u32 gpio, data, keyup;
  88
  89         /* read gpio value */
  90         gpio = bttv_gpio_read(&btv->c);
  91
  92         /* extract data */
  93         data = ir_extract_bits(gpio, ir->mask_keycode);
  94
  95         /* Check if it is keyup */
  96         keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
  97
  98         if ((ir->last_gpio & 0x7f) != data) {
  99                 dprintk(KERN_INFO DEVNAME ": gpio=0x%x code=%d | %s\n",
 100                         gpio, data,
 101                         (gpio & ir->mask_keyup) ? " up" : "up/down");
 102
 103                 ir_keydown_notimeout(ir->dev, data, 0);
 104                 if (keyup)
 105                         ir_keyup(ir->dev);
 106         } else {
 107                 if ((ir->last_gpio & 1 << 31) == keyup)
 108                         return;
 109
 110                 dprintk(KERN_INFO DEVNAME ":(cnt) gpio=0x%x code=%d | %s\n",
 111                         gpio, data,
 112                         (gpio & ir->mask_keyup) ? " up" : "down");
 113
 114                 if (keyup)
 115                         ir_keyup(ir->dev);
 116                 else
 117                         ir_keydown_notimeout(ir->dev, data, 0);
 118         }
 119
 120         ir->last_gpio = data | keyup;
 121 }
 122
 123 void bttv_input_irq(struct bttv *btv)
 124 {
 125         struct card_ir *ir = btv->remote;
 126
 127         if (!ir->polling)
 128                 ir_handle_key(btv);
 129 }
 130
 131 static void bttv_input_timer(unsigned long data)
 132 {
 133         struct bttv *btv = (struct bttv*)data;
 134         struct card_ir *ir = btv->remote;
 135
 136         if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
 137                 ir_enltv_handle_key(btv);
 138         else
 139                 ir_handle_key(btv);
 140         mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
 141 }
 142
 143 /* ---------------------------------------------------------------*/
 144
 145 static int bttv_rc5_irq(struct bttv *btv)
 146 {
 147         struct card_ir *ir = btv->remote;
 148         struct timeval tv;
 149         u32 gpio;
 150         u32 gap;
 151         unsigned long current_jiffies;
 152
 153         /* read gpio port */
 154         gpio = bttv_gpio_read(&btv->c);
 155
 156         /* remote IRQ? */
 157         if (!(gpio & 0x20))
 158                 return 0;
 159
 160         /* get time of bit */
 161         current_jiffies = jiffies;
 162         do_gettimeofday(&tv);
 163
 164         /* avoid overflow with gap >1s */
 165         if (tv.tv_sec - ir->base_time.tv_sec > 1) {
 166                 gap = 200000;
 167         } else {
 168                 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
 169                     tv.tv_usec - ir->base_time.tv_usec;
 170         }
 171
 172         /* active code => add bit */
 173         if (ir->active) {
 174                 /* only if in the code (otherwise spurious IRQ or timer
 175                    late) */
 176                 if (ir->last_bit < 28) {
 177                         ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
 178                             ir_rc5_remote_gap;
 179                         ir->code |= 1 << ir->last_bit;
 180                 }
 181                 /* starting new code */
 182         } else {
 183                 ir->active = 1;
 184                 ir->code = 0;
 185                 ir->base_time = tv;
 186                 ir->last_bit = 0;
 187
 188                 mod_timer(&ir->timer_end,
 189                           current_jiffies + msecs_to_jiffies(30));
 190         }
 191
 192         /* toggle GPIO pin 4 to reset the irq */
 193         bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 194         bttv_gpio_write(&btv->c, gpio | (1 << 4));
 195         return 1;
 196 }
 197
 198 /* ---------------------------------------------------------------------- */
 199
 200 static void bttv_ir_start(struct bttv *btv, struct card_ir *ir)
 201 {
 202         if (ir->polling) {
 203                 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
 204                 ir->timer.expires  = jiffies + msecs_to_jiffies(1000);
 205                 add_timer(&ir->timer);
 206         } else if (ir->rc5_gpio) {
 207                 /* set timer_end for code completion */
 208                 init_timer(&ir->timer_end);
 209                 ir->timer_end.function = ir_rc5_timer_end;
 210                 ir->timer_end.data = (unsigned long)ir;
 211                 ir->shift_by = 1;
 212                 ir->start = 3;
 213                 ir->addr = 0x0;
 214                 ir->rc5_remote_gap = ir_rc5_remote_gap;
 215         }
 216 }
 217
 218 static void bttv_ir_stop(struct bttv *btv)
 219 {
 220         if (btv->remote->polling) {
 221                 del_timer_sync(&btv->remote->timer);
 222                 flush_scheduled_work();
 223         }
 224
 225         if (btv->remote->rc5_gpio) {
 226                 u32 gpio;
 227
 228                 del_timer_sync(&btv->remote->timer_end);
 229                 flush_scheduled_work();
 230
 231                 gpio = bttv_gpio_read(&btv->c);
 232                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 233         }
 234 }
 235
 236 /*
 237  * Get_key functions used by I2C remotes
 238  */
 239
 240 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 241 {
 242         unsigned char b;
 243
 244         /* poll IR chip */
 245         if (1 != i2c_master_recv(ir->c, &b, 1)) {
 246                 dprintk(KERN_INFO DEVNAME ": read error\n");
 247                 return -EIO;
 248         }
 249
 250         /* ignore 0xaa */
 251         if (b==0xaa)
 252                 return 0;
 253         dprintk(KERN_INFO DEVNAME ": key %02x\n", b);
 254
 255         *ir_key = b;
 256         *ir_raw = b;
 257         return 1;
 258 }
 259
 260 /* Instantiate the I2C IR receiver device, if present */
 261 void __devinit init_bttv_i2c_ir(struct bttv *btv)
 262 {
 263         const unsigned short addr_list[] = {
 264                 0x1a, 0x18, 0x64, 0x30, 0x71,
 265                 I2C_CLIENT_END
 266         };
 267         struct i2c_board_info info;
 268
 269         if (0 != btv->i2c_rc)
 270                 return;
 271
 272         memset(&info, 0, sizeof(struct i2c_board_info));
 273         memset(&btv->init_data, 0, sizeof(btv->init_data));
 274         strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
 275
 276         switch (btv->c.type) {
 277         case BTTV_BOARD_PV951:
 278                 btv->init_data.name = "PV951";
 279                 btv->init_data.get_key = get_key_pv951;
 280                 btv->init_data.ir_codes = RC_MAP_PV951;
 281                 info.addr = 0x4b;
 282                 break;
 283         default:
 284                 /*
 285                  * The external IR receiver is at i2c address 0x34 (0x35 for
 286                  * reads).  Future Hauppauge cards will have an internal
 287                  * receiver at 0x30 (0x31 for reads).  In theory, both can be
 288                  * fitted, and Hauppauge suggest an external overrides an
 289                  * internal.
 290                  * That's why we probe 0x1a (~0x34) first. CB
 291                  */
 292
 293                 i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
 294                 return;
 295         }
 296
 297         if (btv->init_data.name)
 298                 info.platform_data = &btv->init_data;
 299         i2c_new_device(&btv->c.i2c_adap, &info);
 300
 301         return;
 302 }
 303
 304 int __devexit fini_bttv_i2c(struct bttv *btv)
 305 {
 306         if (0 != btv->i2c_rc)
 307                 return 0;
 308
 309         return i2c_del_adapter(&btv->c.i2c_adap);
 310 }
 311
 312 int bttv_input_init(struct bttv *btv)
 313 {
 314         struct card_ir *ir;
 315         char *ir_codes = NULL;
 316         struct rc_dev *rc;
 317         int err = -ENOMEM;
 318
 319         if (!btv->has_remote)
 320                 return -ENODEV;
 321
 322         ir = kzalloc(sizeof(*ir),GFP_KERNEL);
 323         rc = rc_allocate_device();
 324         if (!ir || !rc)
 325                 goto err_out_free;
 326
 327         /* detect & configure */
 328         switch (btv->c.type) {
 329         case BTTV_BOARD_AVERMEDIA:
 330         case BTTV_BOARD_AVPHONE98:
 331         case BTTV_BOARD_AVERMEDIA98:
 332                 ir_codes         = RC_MAP_AVERMEDIA;
 333                 ir->mask_keycode = 0xf88000;
 334                 ir->mask_keydown = 0x010000;
 335                 ir->polling      = 50; // ms
 336                 break;
 337
 338         case BTTV_BOARD_AVDVBT_761:
 339         case BTTV_BOARD_AVDVBT_771:
 340                 ir_codes         = RC_MAP_AVERMEDIA_DVBT;
 341                 ir->mask_keycode = 0x0f00c0;
 342                 ir->mask_keydown = 0x000020;
 343                 ir->polling      = 50; // ms
 344                 break;
 345
 346         case BTTV_BOARD_PXELVWPLTVPAK:
 347                 ir_codes         = RC_MAP_PIXELVIEW;
 348                 ir->mask_keycode = 0x003e00;
 349                 ir->mask_keyup   = 0x010000;
 350                 ir->polling      = 50; // ms
 351                 break;
 352         case BTTV_BOARD_PV_M4900:
 353         case BTTV_BOARD_PV_BT878P_9B:
 354         case BTTV_BOARD_PV_BT878P_PLUS:
 355                 ir_codes         = RC_MAP_PIXELVIEW;
 356                 ir->mask_keycode = 0x001f00;
 357                 ir->mask_keyup   = 0x008000;
 358                 ir->polling      = 50; // ms
 359                 break;
 360
 361         case BTTV_BOARD_WINFAST2000:
 362                 ir_codes         = RC_MAP_WINFAST;
 363                 ir->mask_keycode = 0x1f8;
 364                 break;
 365         case BTTV_BOARD_MAGICTVIEW061:
 366         case BTTV_BOARD_MAGICTVIEW063:
 367                 ir_codes         = RC_MAP_WINFAST;
 368                 ir->mask_keycode = 0x0008e000;
 369                 ir->mask_keydown = 0x00200000;
 370                 break;
 371         case BTTV_BOARD_APAC_VIEWCOMP:
 372                 ir_codes         = RC_MAP_APAC_VIEWCOMP;
 373                 ir->mask_keycode = 0x001f00;
 374                 ir->mask_keyup   = 0x008000;
 375                 ir->polling      = 50; // ms
 376                 break;
 377         case BTTV_BOARD_ASKEY_CPH03X:
 378         case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
 379         case BTTV_BOARD_CONTVFMI:
 380                 ir_codes         = RC_MAP_PIXELVIEW;
 381                 ir->mask_keycode = 0x001F00;
 382                 ir->mask_keyup   = 0x006000;
 383                 ir->polling      = 50; // ms
 384                 break;
 385         case BTTV_BOARD_NEBULA_DIGITV:
 386                 ir_codes = RC_MAP_NEBULA;
 387                 btv->custom_irq = bttv_rc5_irq;
 388                 ir->rc5_gpio = 1;
 389                 break;
 390         case BTTV_BOARD_MACHTV_MAGICTV:
 391                 ir_codes         = RC_MAP_APAC_VIEWCOMP;
 392                 ir->mask_keycode = 0x001F00;
 393                 ir->mask_keyup   = 0x004000;
 394                 ir->polling      = 50; /* ms */
 395                 break;
 396         case BTTV_BOARD_KOZUMI_KTV_01C:
 397                 ir_codes         = RC_MAP_PCTV_SEDNA;
 398                 ir->mask_keycode = 0x001f00;
 399                 ir->mask_keyup   = 0x006000;
 400                 ir->polling      = 50; /* ms */
 401                 break;
 402         case BTTV_BOARD_ENLTV_FM_2:
 403                 ir_codes         = RC_MAP_ENCORE_ENLTV2;
 404                 ir->mask_keycode = 0x00fd00;
 405                 ir->mask_keyup   = 0x000080;
 406                 ir->polling      = 1; /* ms */
 407                 ir->last_gpio    = ir_extract_bits(bttv_gpio_read(&btv->c),
 408                                                    ir->mask_keycode);
 409                 break;
 410         }
 411         if (NULL == ir_codes) {
 412                 dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n", btv->c.type);
 413                 err = -ENODEV;
 414                 goto err_out_free;
 415         }
 416
 417         if (ir->rc5_gpio) {
 418                 u32 gpio;
 419                 /* enable remote irq */
 420                 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
 421                 gpio = bttv_gpio_read(&btv->c);
 422                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 423                 bttv_gpio_write(&btv->c, gpio | (1 << 4));
 424         } else {
 425                 /* init hardware-specific stuff */
 426                 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
 427         }
 428
 429         /* init input device */
 430         ir->dev = rc;
 431
 432         snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
 433                  btv->c.type);
 434         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
 435                  pci_name(btv->c.pci));
 436
 437         rc->input_name = ir->name;
 438         rc->input_phys = ir->phys;
 439         rc->input_id.bustype = BUS_PCI;
 440         rc->input_id.version = 1;
 441         if (btv->c.pci->subsystem_vendor) {
 442                 rc->input_id.vendor  = btv->c.pci->subsystem_vendor;
 443                 rc->input_id.product = btv->c.pci->subsystem_device;
 444         } else {
 445                 rc->input_id.vendor  = btv->c.pci->vendor;
 446                 rc->input_id.product = btv->c.pci->device;
 447         }
 448         rc->dev.parent = &btv->c.pci->dev;
 449         rc->map_name = ir_codes;
 450         rc->driver_name = MODULE_NAME;
 451
 452         btv->remote = ir;
 453         bttv_ir_start(btv, ir);
 454
 455         /* all done */
 456         err = rc_register_device(rc);
 457         if (err)
 458                 goto err_out_stop;
 459
 460         return 0;
 461
 462  err_out_stop:
 463         bttv_ir_stop(btv);
 464         btv->remote = NULL;
 465  err_out_free:
 466         rc_free_device(rc);
 467         kfree(ir);
 468         return err;
 469 }
 470
 471 void bttv_input_fini(struct bttv *btv)
 472 {
 473         if (btv->remote == NULL)
 474                 return;
 475
 476         bttv_ir_stop(btv);
 477         rc_unregister_device(btv->remote->dev);
 478         kfree(btv->remote);
 479         btv->remote = NULL;
 480 }