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