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
  27 #include "bttv.h"
  28 #include "bttvp.h"
  29
  30
  31 static int ir_debug;
  32 module_param(ir_debug, int, 0644);
  33 static int repeat_delay = 500;
  34 module_param(repeat_delay, int, 0644);
  35 static int repeat_period = 33;
  36 module_param(repeat_period, int, 0644);
  37
  38 static int ir_rc5_remote_gap = 885;
  39 module_param(ir_rc5_remote_gap, int, 0644);
  40 static int ir_rc5_key_timeout = 200;
  41 module_param(ir_rc5_key_timeout, int, 0644);
  42
  43 #undef dprintk
  44 #define dprintk(arg...) do {    \
  45         if (ir_debug >= 1)      \
  46                 printk(arg);    \
  47 } while (0)
  48
  49 #define DEVNAME "bttv-input"
  50
  51 /* ---------------------------------------------------------------------- */
  52
  53 static void ir_handle_key(struct bttv *btv)
  54 {
  55         struct card_ir *ir = btv->remote;
  56         u32 gpio,data;
  57
  58         /* read gpio value */
  59         gpio = bttv_gpio_read(&btv->c);
  60         if (ir->polling) {
  61                 if (ir->last_gpio == gpio)
  62                         return;
  63                 ir->last_gpio = gpio;
  64         }
  65
  66         /* extract data */
  67         data = ir_extract_bits(gpio, ir->mask_keycode);
  68         dprintk(KERN_INFO DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
  69                 gpio, data,
  70                 ir->polling               ? "poll"  : "irq",
  71                 (gpio & ir->mask_keydown) ? " down" : "",
  72                 (gpio & ir->mask_keyup)   ? " up"   : "");
  73
  74         if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
  75             (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
  76                 ir_input_keydown(ir->dev, &ir->ir, data);
  77         } else {
  78                 /* HACK: Probably, ir->mask_keydown is missing
  79                    for this board */
  80                 if (btv->c.type == BTTV_BOARD_WINFAST2000)
  81                         ir_input_keydown(ir->dev, &ir->ir, data);
  82
  83                 ir_input_nokey(ir->dev,&ir->ir);
  84         }
  85
  86 }
  87
  88 static void ir_enltv_handle_key(struct bttv *btv)
  89 {
  90         struct card_ir *ir = btv->remote;
  91         u32 gpio, data, keyup;
  92
  93         /* read gpio value */
  94         gpio = bttv_gpio_read(&btv->c);
  95
  96         /* extract data */
  97         data = ir_extract_bits(gpio, ir->mask_keycode);
  98
  99         /* Check if it is keyup */
 100         keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
 101
 102         if ((ir->last_gpio & 0x7f) != data) {
 103                 dprintk(KERN_INFO DEVNAME ": gpio=0x%x code=%d | %s\n",
 104                         gpio, data,
 105                         (gpio & ir->mask_keyup) ? " up" : "up/down");
 106
 107                 ir_input_keydown(ir->dev, &ir->ir, data);
 108                 if (keyup)
 109                         ir_input_nokey(ir->dev, &ir->ir);
 110         } else {
 111                 if ((ir->last_gpio & 1 << 31) == keyup)
 112                         return;
 113
 114                 dprintk(KERN_INFO DEVNAME ":(cnt) gpio=0x%x code=%d | %s\n",
 115                         gpio, data,
 116                         (gpio & ir->mask_keyup) ? " up" : "down");
 117
 118                 if (keyup)
 119                         ir_input_nokey(ir->dev, &ir->ir);
 120                 else
 121                         ir_input_keydown(ir->dev, &ir->ir, data);
 122         }
 123
 124         ir->last_gpio = data | keyup;
 125 }
 126
 127 void bttv_input_irq(struct bttv *btv)
 128 {
 129         struct card_ir *ir = btv->remote;
 130
 131         if (!ir->polling)
 132                 ir_handle_key(btv);
 133 }
 134
 135 static void bttv_input_timer(unsigned long data)
 136 {
 137         struct bttv *btv = (struct bttv*)data;
 138         struct card_ir *ir = btv->remote;
 139
 140         if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
 141                 ir_enltv_handle_key(btv);
 142         else
 143                 ir_handle_key(btv);
 144         mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
 145 }
 146
 147 /* ---------------------------------------------------------------*/
 148
 149 static int bttv_rc5_irq(struct bttv *btv)
 150 {
 151         struct card_ir *ir = btv->remote;
 152         struct timeval tv;
 153         u32 gpio;
 154         u32 gap;
 155         unsigned long current_jiffies;
 156
 157         /* read gpio port */
 158         gpio = bttv_gpio_read(&btv->c);
 159
 160         /* remote IRQ? */
 161         if (!(gpio & 0x20))
 162                 return 0;
 163
 164         /* get time of bit */
 165         current_jiffies = jiffies;
 166         do_gettimeofday(&tv);
 167
 168         /* avoid overflow with gap >1s */
 169         if (tv.tv_sec - ir->base_time.tv_sec > 1) {
 170                 gap = 200000;
 171         } else {
 172                 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
 173                     tv.tv_usec - ir->base_time.tv_usec;
 174         }
 175
 176         /* active code => add bit */
 177         if (ir->active) {
 178                 /* only if in the code (otherwise spurious IRQ or timer
 179                    late) */
 180                 if (ir->last_bit < 28) {
 181                         ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
 182                             ir_rc5_remote_gap;
 183                         ir->code |= 1 << ir->last_bit;
 184                 }
 185                 /* starting new code */
 186         } else {
 187                 ir->active = 1;
 188                 ir->code = 0;
 189                 ir->base_time = tv;
 190                 ir->last_bit = 0;
 191
 192                 mod_timer(&ir->timer_end,
 193                           current_jiffies + msecs_to_jiffies(30));
 194         }
 195
 196         /* toggle GPIO pin 4 to reset the irq */
 197         bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 198         bttv_gpio_write(&btv->c, gpio | (1 << 4));
 199         return 1;
 200 }
 201
 202 /* ---------------------------------------------------------------------- */
 203
 204 static void bttv_ir_start(struct bttv *btv, struct card_ir *ir)
 205 {
 206         if (ir->polling) {
 207                 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
 208                 ir->timer.expires  = jiffies + msecs_to_jiffies(1000);
 209                 add_timer(&ir->timer);
 210         } else if (ir->rc5_gpio) {
 211                 /* set timer_end for code completion */
 212                 init_timer(&ir->timer_end);
 213                 ir->timer_end.function = ir_rc5_timer_end;
 214                 ir->timer_end.data = (unsigned long)ir;
 215
 216                 init_timer(&ir->timer_keyup);
 217                 ir->timer_keyup.function = ir_rc5_timer_keyup;
 218                 ir->timer_keyup.data = (unsigned long)ir;
 219                 ir->shift_by = 1;
 220                 ir->start = 3;
 221                 ir->addr = 0x0;
 222                 ir->rc5_key_timeout = ir_rc5_key_timeout;
 223                 ir->rc5_remote_gap = ir_rc5_remote_gap;
 224         }
 225 }
 226
 227 static void bttv_ir_stop(struct bttv *btv)
 228 {
 229         if (btv->remote->polling) {
 230                 del_timer_sync(&btv->remote->timer);
 231                 flush_scheduled_work();
 232         }
 233
 234         if (btv->remote->rc5_gpio) {
 235                 u32 gpio;
 236
 237                 del_timer_sync(&btv->remote->timer_end);
 238                 flush_scheduled_work();
 239
 240                 gpio = bttv_gpio_read(&btv->c);
 241                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 242         }
 243 }
 244
 245 int bttv_input_init(struct bttv *btv)
 246 {
 247         struct card_ir *ir;
 248         struct ir_scancode_table *ir_codes = NULL;
 249         struct input_dev *input_dev;
 250         int ir_type = IR_TYPE_OTHER;
 251         int err = -ENOMEM;
 252
 253         if (!btv->has_remote)
 254                 return -ENODEV;
 255
 256         ir = kzalloc(sizeof(*ir),GFP_KERNEL);
 257         input_dev = input_allocate_device();
 258         if (!ir || !input_dev)
 259                 goto err_out_free;
 260
 261         /* detect & configure */
 262         switch (btv->c.type) {
 263         case BTTV_BOARD_AVERMEDIA:
 264         case BTTV_BOARD_AVPHONE98:
 265         case BTTV_BOARD_AVERMEDIA98:
 266                 ir_codes         = &ir_codes_avermedia_table;
 267                 ir->mask_keycode = 0xf88000;
 268                 ir->mask_keydown = 0x010000;
 269                 ir->polling      = 50; // ms
 270                 break;
 271
 272         case BTTV_BOARD_AVDVBT_761:
 273         case BTTV_BOARD_AVDVBT_771:
 274                 ir_codes         = &ir_codes_avermedia_dvbt_table;
 275                 ir->mask_keycode = 0x0f00c0;
 276                 ir->mask_keydown = 0x000020;
 277                 ir->polling      = 50; // ms
 278                 break;
 279
 280         case BTTV_BOARD_PXELVWPLTVPAK:
 281                 ir_codes         = &ir_codes_pixelview_table;
 282                 ir->mask_keycode = 0x003e00;
 283                 ir->mask_keyup   = 0x010000;
 284                 ir->polling      = 50; // ms
 285                 break;
 286         case BTTV_BOARD_PV_M4900:
 287         case BTTV_BOARD_PV_BT878P_9B:
 288         case BTTV_BOARD_PV_BT878P_PLUS:
 289                 ir_codes         = &ir_codes_pixelview_table;
 290                 ir->mask_keycode = 0x001f00;
 291                 ir->mask_keyup   = 0x008000;
 292                 ir->polling      = 50; // ms
 293                 break;
 294
 295         case BTTV_BOARD_WINFAST2000:
 296                 ir_codes         = &ir_codes_winfast_table;
 297                 ir->mask_keycode = 0x1f8;
 298                 break;
 299         case BTTV_BOARD_MAGICTVIEW061:
 300         case BTTV_BOARD_MAGICTVIEW063:
 301                 ir_codes         = &ir_codes_winfast_table;
 302                 ir->mask_keycode = 0x0008e000;
 303                 ir->mask_keydown = 0x00200000;
 304                 break;
 305         case BTTV_BOARD_APAC_VIEWCOMP:
 306                 ir_codes         = &ir_codes_apac_viewcomp_table;
 307                 ir->mask_keycode = 0x001f00;
 308                 ir->mask_keyup   = 0x008000;
 309                 ir->polling      = 50; // ms
 310                 break;
 311         case BTTV_BOARD_ASKEY_CPH03X:
 312         case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
 313         case BTTV_BOARD_CONTVFMI:
 314                 ir_codes         = &ir_codes_pixelview_table;
 315                 ir->mask_keycode = 0x001F00;
 316                 ir->mask_keyup   = 0x006000;
 317                 ir->polling      = 50; // ms
 318                 break;
 319         case BTTV_BOARD_NEBULA_DIGITV:
 320                 ir_codes = &ir_codes_nebula_table;
 321                 btv->custom_irq = bttv_rc5_irq;
 322                 ir->rc5_gpio = 1;
 323                 break;
 324         case BTTV_BOARD_MACHTV_MAGICTV:
 325                 ir_codes         = &ir_codes_apac_viewcomp_table;
 326                 ir->mask_keycode = 0x001F00;
 327                 ir->mask_keyup   = 0x004000;
 328                 ir->polling      = 50; /* ms */
 329                 break;
 330         case BTTV_BOARD_KOZUMI_KTV_01C:
 331                 ir_codes         = &ir_codes_pctv_sedna_table;
 332                 ir->mask_keycode = 0x001f00;
 333                 ir->mask_keyup   = 0x006000;
 334                 ir->polling      = 50; /* ms */
 335                 break;
 336         case BTTV_BOARD_ENLTV_FM_2:
 337                 ir_codes         = &ir_codes_encore_enltv2_table;
 338                 ir->mask_keycode = 0x00fd00;
 339                 ir->mask_keyup   = 0x000080;
 340                 ir->polling      = 1; /* ms */
 341                 ir->last_gpio    = ir_extract_bits(bttv_gpio_read(&btv->c),
 342                                                    ir->mask_keycode);
 343                 break;
 344         }
 345         if (NULL == ir_codes) {
 346                 dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n", btv->c.type);
 347                 err = -ENODEV;
 348                 goto err_out_free;
 349         }
 350
 351         if (ir->rc5_gpio) {
 352                 u32 gpio;
 353                 /* enable remote irq */
 354                 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
 355                 gpio = bttv_gpio_read(&btv->c);
 356                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
 357                 bttv_gpio_write(&btv->c, gpio | (1 << 4));
 358         } else {
 359                 /* init hardware-specific stuff */
 360                 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
 361         }
 362
 363         /* init input device */
 364         ir->dev = input_dev;
 365
 366         snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
 367                  btv->c.type);
 368         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
 369                  pci_name(btv->c.pci));
 370
 371         err = ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
 372         if (err < 0)
 373                 goto err_out_free;
 374
 375         input_dev->name = ir->name;
 376         input_dev->phys = ir->phys;
 377         input_dev->id.bustype = BUS_PCI;
 378         input_dev->id.version = 1;
 379         if (btv->c.pci->subsystem_vendor) {
 380                 input_dev->id.vendor  = btv->c.pci->subsystem_vendor;
 381                 input_dev->id.product = btv->c.pci->subsystem_device;
 382         } else {
 383                 input_dev->id.vendor  = btv->c.pci->vendor;
 384                 input_dev->id.product = btv->c.pci->device;
 385         }
 386         input_dev->dev.parent = &btv->c.pci->dev;
 387
 388         btv->remote = ir;
 389         bttv_ir_start(btv, ir);
 390
 391         /* all done */
 392         err = input_register_device(btv->remote->dev);
 393         if (err)
 394                 goto err_out_stop;
 395
 396         /* the remote isn't as bouncy as a keyboard */
 397         ir->dev->rep[REP_DELAY] = repeat_delay;
 398         ir->dev->rep[REP_PERIOD] = repeat_period;
 399
 400         return 0;
 401
 402  err_out_stop:
 403         bttv_ir_stop(btv);
 404         btv->remote = NULL;
 405  err_out_free:
 406         ir_input_free(input_dev);
 407         input_free_device(input_dev);
 408         kfree(ir);
 409         return err;
 410 }
 411
 412 void bttv_input_fini(struct bttv *btv)
 413 {
 414         if (btv->remote == NULL)
 415                 return;
 416
 417         bttv_ir_stop(btv);
 418         ir_input_free(btv->remote->dev);
 419         input_unregister_device(btv->remote->dev);
 420         kfree(btv->remote);
 421         btv->remote = NULL;
 422 }
 423
 424
 425 /*
 426  * Local variables:
 427  * c-basic-offset: 8
 428  * End:
 429  */