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