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