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