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