drivers/media/pci/ttpci/av7110_ir.c

   1 /*
   2  * Driver for the remote control of SAA7146 based AV7110 cards
   3  *
   4  * Copyright (C) 1999-2003 Holger Waechtler <holger@convergence.de>
   5  * Copyright (C) 2003-2007 Oliver Endriss <o.endriss@gmx.de>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  * To obtain the license, point your browser to
  17  * http://www.gnu.org/copyleft/gpl.html
  18  *
  19  */
  20
  21
  22 #include <linux/types.h>
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/kernel.h>
  27 #include <linux/bitops.h>
  28
  29 #include "av7110.h"
  30 #include "av7110_hw.h"
  31
  32
  33 #define AV_CNT          4
  34
  35 #define IR_RC5          0
  36 #define IR_RCMM         1
  37 #define IR_RC5_EXT      2 /* internal only */
  38
  39 #define IR_ALL          0xffffffff
  40
  41 #define UP_TIMEOUT      (HZ*7/25)
  42
  43
  44 /* Note: enable ir debugging by or'ing debug with 16 */
  45
  46 static int ir_protocol[AV_CNT] = { IR_RCMM, IR_RCMM, IR_RCMM, IR_RCMM};
  47 module_param_array(ir_protocol, int, NULL, 0644);
  48 MODULE_PARM_DESC(ir_protocol, "Infrared protocol: 0 RC5, 1 RCMM (default)");
  49
  50 static int ir_inversion[AV_CNT];
  51 module_param_array(ir_inversion, int, NULL, 0644);
  52 MODULE_PARM_DESC(ir_inversion, "Inversion of infrared signal: 0 not inverted (default), 1 inverted");
  53
  54 static uint ir_device_mask[AV_CNT] = { IR_ALL, IR_ALL, IR_ALL, IR_ALL };
  55 module_param_array(ir_device_mask, uint, NULL, 0644);
  56 MODULE_PARM_DESC(ir_device_mask, "Bitmask of infrared devices: bit 0..31 = device 0..31 (default: all)");
  57
  58
  59 static int av_cnt;
  60 static struct av7110 *av_list[AV_CNT];
  61
  62 static u16 default_key_map [256] = {
  63         KEY_0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7,
  64         KEY_8, KEY_9, KEY_BACK, 0, KEY_POWER, KEY_MUTE, 0, KEY_INFO,
  65         KEY_VOLUMEUP, KEY_VOLUMEDOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  66         KEY_CHANNELUP, KEY_CHANNELDOWN, 0, 0, 0, 0, 0, 0,
  67         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  68         0, 0, 0, 0, KEY_TEXT, 0, 0, KEY_TV, 0, 0, 0, 0, 0, KEY_SETUP, 0, 0,
  69         0, 0, 0, KEY_SUBTITLE, 0, 0, KEY_LANGUAGE, 0,
  70         KEY_RADIO, 0, 0, 0, 0, KEY_EXIT, 0, 0,
  71         KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_OK, 0, 0, 0,
  72         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RED, KEY_GREEN, KEY_YELLOW,
  73         KEY_BLUE, 0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_LIST, 0, 0, 0, 0, 0, 0,
  74         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  75         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  76         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  77         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  78         0, 0, 0, 0, KEY_UP, KEY_UP, KEY_DOWN, KEY_DOWN,
  79         0, 0, 0, 0, KEY_EPG, 0, 0, 0,
  80         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  81         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  82         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_VCR
  83 };
  84
  85
  86 /* key-up timer */
  87 static void av7110_emit_keyup(struct timer_list *t)
  88 {
  89         struct infrared *ir = from_timer(ir, t, keyup_timer);
  90
  91         if (!ir || !ir->keypressed)
  92                 return;
  93
  94         input_report_key(ir->input_dev, ir->last_key, 0);
  95         input_sync(ir->input_dev);
  96         ir->keypressed = false;
  97 }
  98
  99
 100 /* tasklet */
 101 static void av7110_emit_key(unsigned long parm)
 102 {
 103         struct infrared *ir = (struct infrared *) parm;
 104         u32 ircom = ir->ir_command;
 105         u8 data;
 106         u8 addr;
 107         u16 toggle;
 108         u16 keycode;
 109
 110         /* extract device address and data */
 111         switch (ir->protocol) {
 112         case IR_RC5: /* RC5: 5 bits device address, 6 bits data */
 113                 data = ircom & 0x3f;
 114                 addr = (ircom >> 6) & 0x1f;
 115                 toggle = ircom & 0x0800;
 116                 break;
 117
 118         case IR_RCMM: /* RCMM: ? bits device address, ? bits data */
 119                 data = ircom & 0xff;
 120                 addr = (ircom >> 8) & 0x1f;
 121                 toggle = ircom & 0x8000;
 122                 break;
 123
 124         case IR_RC5_EXT: /* extended RC5: 5 bits device address, 7 bits data */
 125                 data = ircom & 0x3f;
 126                 addr = (ircom >> 6) & 0x1f;
 127                 /* invert 7th data bit for backward compatibility with RC5 keymaps */
 128                 if (!(ircom & 0x1000))
 129                         data |= 0x40;
 130                 toggle = ircom & 0x0800;
 131                 break;
 132
 133         default:
 134                 printk("%s invalid protocol %x\n", __func__, ir->protocol);
 135                 return;
 136         }
 137
 138         input_event(ir->input_dev, EV_MSC, MSC_RAW, (addr << 16) | data);
 139         input_event(ir->input_dev, EV_MSC, MSC_SCAN, data);
 140
 141         keycode = ir->key_map[data];
 142
 143         dprintk(16, "%s: code %08x -> addr %i data 0x%02x -> keycode %i\n",
 144                 __func__, ircom, addr, data, keycode);
 145
 146         /* check device address */
 147         if (!(ir->device_mask & (1 << addr)))
 148                 return;
 149
 150         if (!keycode) {
 151                 printk ("%s: code %08x -> addr %i data 0x%02x -> unknown key!\n",
 152                         __func__, ircom, addr, data);
 153                 return;
 154         }
 155
 156         if (ir->keypressed &&
 157             (ir->last_key != keycode || toggle != ir->last_toggle))
 158                 input_event(ir->input_dev, EV_KEY, ir->last_key, 0);
 159
 160         input_event(ir->input_dev, EV_KEY, keycode, 1);
 161         input_sync(ir->input_dev);
 162
 163         ir->keypressed = true;
 164         ir->last_key = keycode;
 165         ir->last_toggle = toggle;
 166
 167         mod_timer(&ir->keyup_timer, jiffies + UP_TIMEOUT);
 168 }
 169
 170
 171 /* register with input layer */
 172 static void input_register_keys(struct infrared *ir)
 173 {
 174         int i;
 175
 176         set_bit(EV_KEY, ir->input_dev->evbit);
 177         set_bit(EV_REP, ir->input_dev->evbit);
 178         set_bit(EV_MSC, ir->input_dev->evbit);
 179
 180         set_bit(MSC_RAW, ir->input_dev->mscbit);
 181         set_bit(MSC_SCAN, ir->input_dev->mscbit);
 182
 183         memset(ir->input_dev->keybit, 0, sizeof(ir->input_dev->keybit));
 184
 185         for (i = 0; i < ARRAY_SIZE(ir->key_map); i++) {
 186                 if (ir->key_map[i] > KEY_MAX)
 187                         ir->key_map[i] = 0;
 188                 else if (ir->key_map[i] > KEY_RESERVED)
 189                         set_bit(ir->key_map[i], ir->input_dev->keybit);
 190         }
 191
 192         ir->input_dev->keycode = ir->key_map;
 193         ir->input_dev->keycodesize = sizeof(ir->key_map[0]);
 194         ir->input_dev->keycodemax = ARRAY_SIZE(ir->key_map);
 195 }
 196
 197 /* check for configuration changes */
 198 int av7110_check_ir_config(struct av7110 *av7110, int force)
 199 {
 200         int i;
 201         int modified = force;
 202         int ret = -ENODEV;
 203
 204         for (i = 0; i < av_cnt; i++)
 205                 if (av7110 == av_list[i])
 206                         break;
 207
 208         if (i < av_cnt && av7110) {
 209                 if ((av7110->ir.protocol & 1) != ir_protocol[i] ||
 210                     av7110->ir.inversion != ir_inversion[i])
 211                         modified = true;
 212
 213                 if (modified) {
 214                         /* protocol */
 215                         if (ir_protocol[i]) {
 216                                 ir_protocol[i] = 1;
 217                                 av7110->ir.protocol = IR_RCMM;
 218                                 av7110->ir.ir_config = 0x0001;
 219                         } else if (FW_VERSION(av7110->arm_app) >= 0x2620) {
 220                                 av7110->ir.protocol = IR_RC5_EXT;
 221                                 av7110->ir.ir_config = 0x0002;
 222                         } else {
 223                                 av7110->ir.protocol = IR_RC5;
 224                                 av7110->ir.ir_config = 0x0000;
 225                         }
 226                         /* inversion */
 227                         if (ir_inversion[i]) {
 228                                 ir_inversion[i] = 1;
 229                                 av7110->ir.ir_config |= 0x8000;
 230                         }
 231                         av7110->ir.inversion = ir_inversion[i];
 232                         /* update ARM */
 233                         ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetIR, 1,
 234                                                 av7110->ir.ir_config);
 235                 } else
 236                         ret = 0;
 237
 238                 /* address */
 239                 if (av7110->ir.device_mask != ir_device_mask[i])
 240                         av7110->ir.device_mask = ir_device_mask[i];
 241         }
 242
 243         return ret;
 244 }
 245
 246
 247 /* /proc/av7110_ir interface */
 248 static ssize_t av7110_ir_proc_write(struct file *file, const char __user *buffer,
 249                                     size_t count, loff_t *pos)
 250 {
 251         char *page;
 252         u32 ir_config;
 253         int size = sizeof ir_config + sizeof av_list[0]->ir.key_map;
 254         int i;
 255
 256         if (count < size)
 257                 return -EINVAL;
 258
 259         page = vmalloc(size);
 260         if (!page)
 261                 return -ENOMEM;
 262
 263         if (copy_from_user(page, buffer, size)) {
 264                 vfree(page);
 265                 return -EFAULT;
 266         }
 267
 268         memcpy(&ir_config, page, sizeof ir_config);
 269
 270         for (i = 0; i < av_cnt; i++) {
 271                 /* keymap */
 272                 memcpy(av_list[i]->ir.key_map, page + sizeof ir_config,
 273                         sizeof(av_list[i]->ir.key_map));
 274                 /* protocol, inversion, address */
 275                 ir_protocol[i] = ir_config & 0x0001;
 276                 ir_inversion[i] = ir_config & 0x8000 ? 1 : 0;
 277                 if (ir_config & 0x4000)
 278                         ir_device_mask[i] = 1 << ((ir_config >> 16) & 0x1f);
 279                 else
 280                         ir_device_mask[i] = IR_ALL;
 281                 /* update configuration */
 282                 av7110_check_ir_config(av_list[i], false);
 283                 input_register_keys(&av_list[i]->ir);
 284         }
 285         vfree(page);
 286         return count;
 287 }
 288
 289 static const struct file_operations av7110_ir_proc_fops = {
 290         .owner          = THIS_MODULE,
 291         .write          = av7110_ir_proc_write,
 292         .llseek         = noop_llseek,
 293 };
 294
 295 /* interrupt handler */
 296 static void ir_handler(struct av7110 *av7110, u32 ircom)
 297 {
 298         dprintk(4, "ir command = %08x\n", ircom);
 299         av7110->ir.ir_command = ircom;
 300         tasklet_schedule(&av7110->ir.ir_tasklet);
 301 }
 302
 303
 304 int av7110_ir_init(struct av7110 *av7110)
 305 {
 306         struct input_dev *input_dev;
 307         static struct proc_dir_entry *e;
 308         int err;
 309
 310         if (av_cnt >= ARRAY_SIZE(av_list))
 311                 return -ENOSPC;
 312
 313         av_list[av_cnt++] = av7110;
 314         av7110_check_ir_config(av7110, true);
 315
 316         timer_setup(&av7110->ir.keyup_timer, av7110_emit_keyup, 0);
 317
 318         input_dev = input_allocate_device();
 319         if (!input_dev)
 320                 return -ENOMEM;
 321
 322         av7110->ir.input_dev = input_dev;
 323         snprintf(av7110->ir.input_phys, sizeof(av7110->ir.input_phys),
 324                 "pci-%s/ir0", pci_name(av7110->dev->pci));
 325
 326         input_dev->name = "DVB on-card IR receiver";
 327
 328         input_dev->phys = av7110->ir.input_phys;
 329         input_dev->id.bustype = BUS_PCI;
 330         input_dev->id.version = 2;
 331         if (av7110->dev->pci->subsystem_vendor) {
 332                 input_dev->id.vendor = av7110->dev->pci->subsystem_vendor;
 333                 input_dev->id.product = av7110->dev->pci->subsystem_device;
 334         } else {
 335                 input_dev->id.vendor = av7110->dev->pci->vendor;
 336                 input_dev->id.product = av7110->dev->pci->device;
 337         }
 338         input_dev->dev.parent = &av7110->dev->pci->dev;
 339         /* initial keymap */
 340         memcpy(av7110->ir.key_map, default_key_map, sizeof av7110->ir.key_map);
 341         input_register_keys(&av7110->ir);
 342         err = input_register_device(input_dev);
 343         if (err) {
 344                 input_free_device(input_dev);
 345                 return err;
 346         }
 347
 348         /*
 349          * Input core's default autorepeat is 33 cps with 250 msec
 350          * delay, let's adjust to numbers more suitable for remote
 351          * control.
 352          */
 353         input_enable_softrepeat(input_dev, 250, 125);
 354
 355         if (av_cnt == 1) {
 356                 e = proc_create("av7110_ir", S_IWUSR, NULL, &av7110_ir_proc_fops);
 357                 if (e)
 358                         proc_set_size(e, 4 + 256 * sizeof(u16));
 359         }
 360
 361         tasklet_init(&av7110->ir.ir_tasklet, av7110_emit_key, (unsigned long) &av7110->ir);
 362         av7110->ir.ir_handler = ir_handler;
 363
 364         return 0;
 365 }
 366
 367
 368 void av7110_ir_exit(struct av7110 *av7110)
 369 {
 370         int i;
 371
 372         if (av_cnt == 0)
 373                 return;
 374
 375         del_timer_sync(&av7110->ir.keyup_timer);
 376         av7110->ir.ir_handler = NULL;
 377         tasklet_kill(&av7110->ir.ir_tasklet);
 378
 379         for (i = 0; i < av_cnt; i++)
 380                 if (av_list[i] == av7110) {
 381                         av_list[i] = av_list[av_cnt-1];
 382                         av_list[av_cnt-1] = NULL;
 383                         break;
 384                 }
 385
 386         if (av_cnt == 1)
 387                 remove_proc_entry("av7110_ir", NULL);
 388
 389         input_unregister_device(av7110->ir.input_dev);
 390
 391         av_cnt--;
 392 }
 393
 394 //MODULE_AUTHOR("Holger Waechtler <holger@convergence.de>, Oliver Endriss <o.endriss@gmx.de>");
 395 //MODULE_LICENSE("GPL");