drivers/input/keyboard/sunkbd.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  */
   4
   5 /*
   6  * Sun keyboard driver for Linux
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/sched.h>
  31 #include <linux/slab.h>
  32 #include <linux/module.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/init.h>
  35 #include <linux/input.h>
  36 #include <linux/serio.h>
  37 #include <linux/workqueue.h>
  38
  39 #define DRIVER_DESC     "Sun keyboard driver"
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION(DRIVER_DESC);
  43 MODULE_LICENSE("GPL");
  44
  45 static unsigned char sunkbd_keycode[128] = {
  46           0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
  47          65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106,  1,  2,  3,
  48           4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
  49         116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
  50          26, 27,111,127, 71, 72, 73, 74,134,135,107,  0, 29, 30, 31, 32,
  51          33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
  52         104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
  53          79, 80, 81,  0,  0,  0,138, 58,125, 57,126,109, 86, 78
  54 };
  55
  56 #define SUNKBD_CMD_RESET        0x1
  57 #define SUNKBD_CMD_BELLON       0x2
  58 #define SUNKBD_CMD_BELLOFF      0x3
  59 #define SUNKBD_CMD_CLICK        0xa
  60 #define SUNKBD_CMD_NOCLICK      0xb
  61 #define SUNKBD_CMD_SETLED       0xe
  62 #define SUNKBD_CMD_LAYOUT       0xf
  63
  64 #define SUNKBD_RET_RESET        0xff
  65 #define SUNKBD_RET_ALLUP        0x7f
  66 #define SUNKBD_RET_LAYOUT       0xfe
  67
  68 #define SUNKBD_LAYOUT_5_MASK    0x20
  69 #define SUNKBD_RELEASE          0x80
  70 #define SUNKBD_KEY              0x7f
  71
  72 /*
  73  * Per-keyboard data.
  74  */
  75
  76 struct sunkbd {
  77         unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
  78         struct input_dev *dev;
  79         struct serio *serio;
  80         struct work_struct tq;
  81         wait_queue_head_t wait;
  82         char name[64];
  83         char phys[32];
  84         char type;
  85         bool enabled;
  86         volatile s8 reset;
  87         volatile s8 layout;
  88 };
  89
  90 /*
  91  * sunkbd_interrupt() is called by the low level driver when a character
  92  * is received.
  93  */
  94
  95 static irqreturn_t sunkbd_interrupt(struct serio *serio,
  96                 unsigned char data, unsigned int flags)
  97 {
  98         struct sunkbd *sunkbd = serio_get_drvdata(serio);
  99
 100         if (sunkbd->reset <= -1) {
 101                 /*
 102                  * If cp[i] is 0xff, sunkbd->reset will stay -1.
 103                  * The keyboard sends 0xff 0xff 0xID on powerup.
 104                  */
 105                 sunkbd->reset = data;
 106                 wake_up_interruptible(&sunkbd->wait);
 107                 goto out;
 108         }
 109
 110         if (sunkbd->layout == -1) {
 111                 sunkbd->layout = data;
 112                 wake_up_interruptible(&sunkbd->wait);
 113                 goto out;
 114         }
 115
 116         switch (data) {
 117
 118         case SUNKBD_RET_RESET:
 119                 schedule_work(&sunkbd->tq);
 120                 sunkbd->reset = -1;
 121                 break;
 122
 123         case SUNKBD_RET_LAYOUT:
 124                 sunkbd->layout = -1;
 125                 break;
 126
 127         case SUNKBD_RET_ALLUP: /* All keys released */
 128                 break;
 129
 130         default:
 131                 if (!sunkbd->enabled)
 132                         break;
 133
 134                 if (sunkbd->keycode[data & SUNKBD_KEY]) {
 135                         input_report_key(sunkbd->dev,
 136                                          sunkbd->keycode[data & SUNKBD_KEY],
 137                                          !(data & SUNKBD_RELEASE));
 138                         input_sync(sunkbd->dev);
 139                 } else {
 140                         printk(KERN_WARNING
 141                                 "sunkbd.c: Unknown key (scancode %#x) %s.\n",
 142                                 data & SUNKBD_KEY,
 143                                 data & SUNKBD_RELEASE ? "released" : "pressed");
 144                 }
 145         }
 146 out:
 147         return IRQ_HANDLED;
 148 }
 149
 150 /*
 151  * sunkbd_event() handles events from the input module.
 152  */
 153
 154 static int sunkbd_event(struct input_dev *dev,
 155                         unsigned int type, unsigned int code, int value)
 156 {
 157         struct sunkbd *sunkbd = input_get_drvdata(dev);
 158
 159         switch (type) {
 160
 161         case EV_LED:
 162
 163                 serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
 164                 serio_write(sunkbd->serio,
 165                         (!!test_bit(LED_CAPSL,   dev->led) << 3) |
 166                         (!!test_bit(LED_SCROLLL, dev->led) << 2) |
 167                         (!!test_bit(LED_COMPOSE, dev->led) << 1) |
 168                          !!test_bit(LED_NUML,    dev->led));
 169                 return 0;
 170
 171         case EV_SND:
 172
 173                 switch (code) {
 174
 175                 case SND_CLICK:
 176                         serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
 177                         return 0;
 178
 179                 case SND_BELL:
 180                         serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
 181                         return 0;
 182                 }
 183
 184                 break;
 185         }
 186
 187         return -1;
 188 }
 189
 190 /*
 191  * sunkbd_initialize() checks for a Sun keyboard attached, and determines
 192  * its type.
 193  */
 194
 195 static int sunkbd_initialize(struct sunkbd *sunkbd)
 196 {
 197         sunkbd->reset = -2;
 198         serio_write(sunkbd->serio, SUNKBD_CMD_RESET);
 199         wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
 200         if (sunkbd->reset < 0)
 201                 return -1;
 202
 203         sunkbd->type = sunkbd->reset;
 204
 205         if (sunkbd->type == 4) {        /* Type 4 keyboard */
 206                 sunkbd->layout = -2;
 207                 serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
 208                 wait_event_interruptible_timeout(sunkbd->wait,
 209                                                  sunkbd->layout >= 0, HZ / 4);
 210                 if (sunkbd->layout < 0)
 211                         return -1;
 212                 if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK)
 213                         sunkbd->type = 5;
 214         }
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * sunkbd_reinit() sets leds and beeps to a state the computer remembers they
 221  * were in.
 222  */
 223
 224 static void sunkbd_reinit(struct work_struct *work)
 225 {
 226         struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
 227
 228         wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
 229
 230         serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
 231         serio_write(sunkbd->serio,
 232                 (!!test_bit(LED_CAPSL,   sunkbd->dev->led) << 3) |
 233                 (!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) |
 234                 (!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) |
 235                  !!test_bit(LED_NUML,    sunkbd->dev->led));
 236         serio_write(sunkbd->serio,
 237                 SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
 238         serio_write(sunkbd->serio,
 239                 SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
 240 }
 241
 242 static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
 243 {
 244         serio_pause_rx(sunkbd->serio);
 245         sunkbd->enabled = enable;
 246         serio_continue_rx(sunkbd->serio);
 247 }
 248
 249 /*
 250  * sunkbd_connect() probes for a Sun keyboard and fills the necessary
 251  * structures.
 252  */
 253
 254 static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
 255 {
 256         struct sunkbd *sunkbd;
 257         struct input_dev *input_dev;
 258         int err = -ENOMEM;
 259         int i;
 260
 261         sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL);
 262         input_dev = input_allocate_device();
 263         if (!sunkbd || !input_dev)
 264                 goto fail1;
 265
 266         sunkbd->serio = serio;
 267         sunkbd->dev = input_dev;
 268         init_waitqueue_head(&sunkbd->wait);
 269         INIT_WORK(&sunkbd->tq, sunkbd_reinit);
 270         snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);
 271
 272         serio_set_drvdata(serio, sunkbd);
 273
 274         err = serio_open(serio, drv);
 275         if (err)
 276                 goto fail2;
 277
 278         if (sunkbd_initialize(sunkbd) < 0) {
 279                 err = -ENODEV;
 280                 goto fail3;
 281         }
 282
 283         snprintf(sunkbd->name, sizeof(sunkbd->name),
 284                  "Sun Type %d keyboard", sunkbd->type);
 285         memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));
 286
 287         input_dev->name = sunkbd->name;
 288         input_dev->phys = sunkbd->phys;
 289         input_dev->id.bustype = BUS_RS232;
 290         input_dev->id.vendor  = SERIO_SUNKBD;
 291         input_dev->id.product = sunkbd->type;
 292         input_dev->id.version = 0x0100;
 293         input_dev->dev.parent = &serio->dev;
 294
 295         input_set_drvdata(input_dev, sunkbd);
 296
 297         input_dev->event = sunkbd_event;
 298
 299         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
 300                 BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
 301         input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
 302                 BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
 303         input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);
 304
 305         input_dev->keycode = sunkbd->keycode;
 306         input_dev->keycodesize = sizeof(unsigned char);
 307         input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
 308         for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++)
 309                 __set_bit(sunkbd->keycode[i], input_dev->keybit);
 310         __clear_bit(KEY_RESERVED, input_dev->keybit);
 311
 312         sunkbd_enable(sunkbd, true);
 313
 314         err = input_register_device(sunkbd->dev);
 315         if (err)
 316                 goto fail4;
 317
 318         return 0;
 319
 320  fail4: sunkbd_enable(sunkbd, false);
 321  fail3: serio_close(serio);
 322  fail2: serio_set_drvdata(serio, NULL);
 323  fail1: input_free_device(input_dev);
 324         kfree(sunkbd);
 325         return err;
 326 }
 327
 328 /*
 329  * sunkbd_disconnect() unregisters and closes behind us.
 330  */
 331
 332 static void sunkbd_disconnect(struct serio *serio)
 333 {
 334         struct sunkbd *sunkbd = serio_get_drvdata(serio);
 335
 336         sunkbd_enable(sunkbd, false);
 337         input_unregister_device(sunkbd->dev);
 338         serio_close(serio);
 339         serio_set_drvdata(serio, NULL);
 340         kfree(sunkbd);
 341 }
 342
 343 static struct serio_device_id sunkbd_serio_ids[] = {
 344         {
 345                 .type   = SERIO_RS232,
 346                 .proto  = SERIO_SUNKBD,
 347                 .id     = SERIO_ANY,
 348                 .extra  = SERIO_ANY,
 349         },
 350         {
 351                 .type   = SERIO_RS232,
 352                 .proto  = SERIO_UNKNOWN, /* sunkbd does probe */
 353                 .id     = SERIO_ANY,
 354                 .extra  = SERIO_ANY,
 355         },
 356         { 0 }
 357 };
 358
 359 MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);
 360
 361 static struct serio_driver sunkbd_drv = {
 362         .driver         = {
 363                 .name   = "sunkbd",
 364         },
 365         .description    = DRIVER_DESC,
 366         .id_table       = sunkbd_serio_ids,
 367         .interrupt      = sunkbd_interrupt,
 368         .connect        = sunkbd_connect,
 369         .disconnect     = sunkbd_disconnect,
 370 };
 371
 372 /*
 373  * The functions for insering/removing us as a module.
 374  */
 375
 376 static int __init sunkbd_init(void)
 377 {
 378         return serio_register_driver(&sunkbd_drv);
 379 }
 380
 381 static void __exit sunkbd_exit(void)
 382 {
 383         serio_unregister_driver(&sunkbd_drv);
 384 }
 385
 386 module_init(sunkbd_init);
 387 module_exit(sunkbd_exit);