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[128];
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 unsigned char 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) { /* If cp[i] is 0xff, sunkbd->reset will stay -1. */
100 sunkbd->reset = data; /* The keyboard sends 0xff 0xff 0xID on powerup */
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, sunkbd->keycode[data & SUNKBD_KEY], !(data & SUNKBD_RELEASE));
131 input_sync(sunkbd->dev);
132 } else {
133 printk(KERN_WARNING "sunkbd.c: Unknown key (scancode %#x) %s.\n",
134 data & SUNKBD_KEY, data & SUNKBD_RELEASE ? "released" : "pressed");
135 }
136 }
137 out:
138 return IRQ_HANDLED;
139 }
140
141 /*
142 * sunkbd_event() handles events from the input module.
143 */
144
145 static int sunkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
146 {
147 struct sunkbd *sunkbd = input_get_drvdata(dev);
148
149 switch (type) {
150
151 case EV_LED:
152
153 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
154 sunkbd->serio->write(sunkbd->serio,
155 (!!test_bit(LED_CAPSL, dev->led) << 3) | (!!test_bit(LED_SCROLLL, dev->led) << 2) |
156 (!!test_bit(LED_COMPOSE, dev->led) << 1) | !!test_bit(LED_NUML, dev->led));
157 return 0;
158
159 case EV_SND:
160
161 switch (code) {
162
163 case SND_CLICK:
164 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
165 return 0;
166
167 case SND_BELL:
168 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
169 return 0;
170 }
171
172 break;
173 }
174
175 return -1;
176 }
177
178 /*
179 * sunkbd_initialize() checks for a Sun keyboard attached, and determines
180 * its type.
181 */
182
183 static int sunkbd_initialize(struct sunkbd *sunkbd)
184 {
185 sunkbd->reset = -2;
186 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_RESET);
187 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
188 if (sunkbd->reset < 0)
189 return -1;
190
191 sunkbd->type = sunkbd->reset;
192
193 if (sunkbd->type == 4) { /* Type 4 keyboard */
194 sunkbd->layout = -2;
195 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
196 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->layout >= 0, HZ/4);
197 if (sunkbd->layout < 0) return -1;
198 if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK) sunkbd->type = 5;
199 }
200
201 return 0;
202 }
203
204 /*
205 * sunkbd_reinit() sets leds and beeps to a state the computer remembers they
206 * were in.
207 */
208
209 static void sunkbd_reinit(struct work_struct *work)
210 {
211 struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
212
213 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
214
215 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
216 sunkbd->serio->write(sunkbd->serio,
217 (!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3) | (!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) |
218 (!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) | !!test_bit(LED_NUML, sunkbd->dev->led));
219 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
220 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
221 }
222
223 static void sunkbd_enable(struct sunkbd *sunkbd, int enable)
224 {
225 serio_pause_rx(sunkbd->serio);
226 sunkbd->enabled = enable;
227 serio_continue_rx(sunkbd->serio);
228 }
229
230 /*
231 * sunkbd_connect() probes for a Sun keyboard and fills the necessary structures.
232 */
233
234 static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
235 {
236 struct sunkbd *sunkbd;
237 struct input_dev *input_dev;
238 int err = -ENOMEM;
239 int i;
240
241 sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL);
242 input_dev = input_allocate_device();
243 if (!sunkbd || !input_dev)
244 goto fail1;
245
246 sunkbd->serio = serio;
247 sunkbd->dev = input_dev;
248 init_waitqueue_head(&sunkbd->wait);
249 INIT_WORK(&sunkbd->tq, sunkbd_reinit);
250 snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);
251
252 serio_set_drvdata(serio, sunkbd);
253
254 err = serio_open(serio, drv);
255 if (err)
256 goto fail2;
257
258 if (sunkbd_initialize(sunkbd) < 0) {
259 err = -ENODEV;
260 goto fail3;
261 }
262
263 snprintf(sunkbd->name, sizeof(sunkbd->name), "Sun Type %d keyboard", sunkbd->type);
264 memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));
265
266 input_dev->name = sunkbd->name;
267 input_dev->phys = sunkbd->phys;
268 input_dev->id.bustype = BUS_RS232;
269 input_dev->id.vendor = SERIO_SUNKBD;
270 input_dev->id.product = sunkbd->type;
271 input_dev->id.version = 0x0100;
272 input_dev->dev.parent = &serio->dev;
273
274 input_set_drvdata(input_dev, sunkbd);
275
276 input_dev->event = sunkbd_event;
277
278 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
279 BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
280 input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
281 BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
282 input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);
283
284 input_dev->keycode = sunkbd->keycode;
285 input_dev->keycodesize = sizeof(unsigned char);
286 input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
287 for (i = 0; i < 128; i++)
288 set_bit(sunkbd->keycode[i], input_dev->keybit);
289 clear_bit(0, input_dev->keybit);
290
291 sunkbd_enable(sunkbd, 1);
292
293 err = input_register_device(sunkbd->dev);
294 if (err)
295 goto fail4;
296
297 return 0;
298
299 fail4: sunkbd_enable(sunkbd, 0);
300 fail3: serio_close(serio);
301 fail2: serio_set_drvdata(serio, NULL);
302 fail1: input_free_device(input_dev);
303 kfree(sunkbd);
304 return err;
305 }
306
307 /*
308 * sunkbd_disconnect() unregisters and closes behind us.
309 */
310
311 static void sunkbd_disconnect(struct serio *serio)
312 {
313 struct sunkbd *sunkbd = serio_get_drvdata(serio);
314
315 sunkbd_enable(sunkbd, 0);
316 input_unregister_device(sunkbd->dev);
317 serio_close(serio);
318 serio_set_drvdata(serio, NULL);
319 kfree(sunkbd);
320 }
321
322 static struct serio_device_id sunkbd_serio_ids[] = {
323 {
324 .type = SERIO_RS232,
325 .proto = SERIO_SUNKBD,
326 .id = SERIO_ANY,
327 .extra = SERIO_ANY,
328 },
329 {
330 .type = SERIO_RS232,
331 .proto = SERIO_UNKNOWN, /* sunkbd does probe */
332 .id = SERIO_ANY,
333 .extra = SERIO_ANY,
334 },
335 { 0 }
336 };
337
338 MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);
339
340 static struct serio_driver sunkbd_drv = {
341 .driver = {
342 .name = "sunkbd",
343 },
344 .description = DRIVER_DESC,
345 .id_table = sunkbd_serio_ids,
346 .interrupt = sunkbd_interrupt,
347 .connect = sunkbd_connect,
348 .disconnect = sunkbd_disconnect,
349 };
350
351 /*
352 * The functions for insering/removing us as a module.
353 */
354
355 static int __init sunkbd_init(void)
356 {
357 return serio_register_driver(&sunkbd_drv);
358 }
359
360 static void __exit sunkbd_exit(void)
361 {
362 serio_unregister_driver(&sunkbd_drv);
363 }
364
365 module_init(sunkbd_init);
366 module_exit(sunkbd_exit);
367
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