1 /*
2 * $Id: sunkbd.c,v 1.14 2001/09/25 10:12:07 vojtech Exp $
3 *
4 * Copyright (c) 1999-2001 Vojtech Pavlik
5 */
6
7 /*
8 * Sun keyboard driver for Linux
9 */
10
11 /*
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 * Should you need to contact me, the author, you can do so either by
27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 */
30
31 #include <linux/delay.h>
32 #include <linux/slab.h>
33 #include <linux/module.h>
34 #include <linux/interrupt.h>
35 #include <linux/init.h>
36 #include <linux/input.h>
37 #include <linux/serio.h>
38 #include <linux/workqueue.h>
39
40 #define DRIVER_DESC "Sun keyboard driver"
41
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE("GPL");
45
46 static unsigned char sunkbd_keycode[128] = {
47 0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
48 65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106, 1, 2, 3,
49 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
50 116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
51 26, 27,111,127, 71, 72, 73, 74,134,135,107, 0, 29, 30, 31, 32,
52 33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
53 104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
54 79, 80, 81, 0, 0, 0,138, 58,125, 57,126,109, 86, 78
55 };
56
57 #define SUNKBD_CMD_RESET 0x1
58 #define SUNKBD_CMD_BELLON 0x2
59 #define SUNKBD_CMD_BELLOFF 0x3
60 #define SUNKBD_CMD_CLICK 0xa
61 #define SUNKBD_CMD_NOCLICK 0xb
62 #define SUNKBD_CMD_SETLED 0xe
63 #define SUNKBD_CMD_LAYOUT 0xf
64
65 #define SUNKBD_RET_RESET 0xff
66 #define SUNKBD_RET_ALLUP 0x7f
67 #define SUNKBD_RET_LAYOUT 0xfe
68
69 #define SUNKBD_LAYOUT_5_MASK 0x20
70 #define SUNKBD_RELEASE 0x80
71 #define SUNKBD_KEY 0x7f
72
73 /*
74 * Per-keyboard data.
75 */
76
77 struct sunkbd {
78 unsigned char keycode[128];
79 struct input_dev *dev;
80 struct serio *serio;
81 struct work_struct tq;
82 wait_queue_head_t wait;
83 char name[64];
84 char phys[32];
85 char type;
86 unsigned char enabled;
87 volatile s8 reset;
88 volatile s8 layout;
89 };
90
91 /*
92 * sunkbd_interrupt() is called by the low level driver when a character
93 * is received.
94 */
95
96 static irqreturn_t sunkbd_interrupt(struct serio *serio,
97 unsigned char data, unsigned int flags)
98 {
99 struct sunkbd* sunkbd = serio_get_drvdata(serio);
100
101 if (sunkbd->reset <= -1) { /* If cp[i] is 0xff, sunkbd->reset will stay -1. */
102 sunkbd->reset = data; /* The keyboard sends 0xff 0xff 0xID on powerup */
103 wake_up_interruptible(&sunkbd->wait);
104 goto out;
105 }
106
107 if (sunkbd->layout == -1) {
108 sunkbd->layout = data;
109 wake_up_interruptible(&sunkbd->wait);
110 goto out;
111 }
112
113 switch (data) {
114
115 case SUNKBD_RET_RESET:
116 schedule_work(&sunkbd->tq);
117 sunkbd->reset = -1;
118 break;
119
120 case SUNKBD_RET_LAYOUT:
121 sunkbd->layout = -1;
122 break;
123
124 case SUNKBD_RET_ALLUP: /* All keys released */
125 break;
126
127 default:
128 if (!sunkbd->enabled)
129 break;
130
131 if (sunkbd->keycode[data & SUNKBD_KEY]) {
132 input_report_key(sunkbd->dev, sunkbd->keycode[data & SUNKBD_KEY], !(data & SUNKBD_RELEASE));
133 input_sync(sunkbd->dev);
134 } else {
135 printk(KERN_WARNING "sunkbd.c: Unknown key (scancode %#x) %s.\n",
136 data & SUNKBD_KEY, data & SUNKBD_RELEASE ? "released" : "pressed");
137 }
138 }
139 out:
140 return IRQ_HANDLED;
141 }
142
143 /*
144 * sunkbd_event() handles events from the input module.
145 */
146
147 static int sunkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
148 {
149 struct sunkbd *sunkbd = input_get_drvdata(dev);
150
151 switch (type) {
152
153 case EV_LED:
154
155 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
156 sunkbd->serio->write(sunkbd->serio,
157 (!!test_bit(LED_CAPSL, dev->led) << 3) | (!!test_bit(LED_SCROLLL, dev->led) << 2) |
158 (!!test_bit(LED_COMPOSE, dev->led) << 1) | !!test_bit(LED_NUML, dev->led));
159 return 0;
160
161 case EV_SND:
162
163 switch (code) {
164
165 case SND_CLICK:
166 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
167 return 0;
168
169 case SND_BELL:
170 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
171 return 0;
172 }
173
174 break;
175 }
176
177 return -1;
178 }
179
180 /*
181 * sunkbd_initialize() checks for a Sun keyboard attached, and determines
182 * its type.
183 */
184
185 static int sunkbd_initialize(struct sunkbd *sunkbd)
186 {
187 sunkbd->reset = -2;
188 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_RESET);
189 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
190 if (sunkbd->reset < 0)
191 return -1;
192
193 sunkbd->type = sunkbd->reset;
194
195 if (sunkbd->type == 4) { /* Type 4 keyboard */
196 sunkbd->layout = -2;
197 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
198 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->layout >= 0, HZ/4);
199 if (sunkbd->layout < 0) return -1;
200 if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK) sunkbd->type = 5;
201 }
202
203 return 0;
204 }
205
206 /*
207 * sunkbd_reinit() sets leds and beeps to a state the computer remembers they
208 * were in.
209 */
210
211 static void sunkbd_reinit(struct work_struct *work)
212 {
213 struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
214
215 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
216
217 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
218 sunkbd->serio->write(sunkbd->serio,
219 (!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3) | (!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) |
220 (!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) | !!test_bit(LED_NUML, sunkbd->dev->led));
221 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
222 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
223 }
224
225 static void sunkbd_enable(struct sunkbd *sunkbd, int enable)
226 {
227 serio_pause_rx(sunkbd->serio);
228 sunkbd->enabled = enable;
229 serio_continue_rx(sunkbd->serio);
230 }
231
232 /*
233 * sunkbd_connect() probes for a Sun keyboard and fills the necessary structures.
234 */
235
236 static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
237 {
238 struct sunkbd *sunkbd;
239 struct input_dev *input_dev;
240 int err = -ENOMEM;
241 int i;
242
243 sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL);
244 input_dev = input_allocate_device();
245 if (!sunkbd || !input_dev)
246 goto fail1;
247
248 sunkbd->serio = serio;
249 sunkbd->dev = input_dev;
250 init_waitqueue_head(&sunkbd->wait);
251 INIT_WORK(&sunkbd->tq, sunkbd_reinit);
252 snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);
253
254 serio_set_drvdata(serio, sunkbd);
255
256 err = serio_open(serio, drv);
257 if (err)
258 goto fail2;
259
260 if (sunkbd_initialize(sunkbd) < 0) {
261 err = -ENODEV;
262 goto fail3;
263 }
264
265 snprintf(sunkbd->name, sizeof(sunkbd->name), "Sun Type %d keyboard", sunkbd->type);
266 memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));
267
268 input_dev->name = sunkbd->name;
269 input_dev->phys = sunkbd->phys;
270 input_dev->id.bustype = BUS_RS232;
271 input_dev->id.vendor = SERIO_SUNKBD;
272 input_dev->id.product = sunkbd->type;
273 input_dev->id.version = 0x0100;
274 input_dev->dev.parent = &serio->dev;
275
276 input_set_drvdata(input_dev, sunkbd);
277
278 input_dev->event = sunkbd_event;
279
280 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
281 BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
282 input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
283 BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
284 input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);
285
286 input_dev->keycode = sunkbd->keycode;
287 input_dev->keycodesize = sizeof(unsigned char);
288 input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
289 for (i = 0; i < 128; i++)
290 set_bit(sunkbd->keycode[i], input_dev->keybit);
291 clear_bit(0, input_dev->keybit);
292
293 sunkbd_enable(sunkbd, 1);
294
295 err = input_register_device(sunkbd->dev);
296 if (err)
297 goto fail4;
298
299 return 0;
300
301 fail4: sunkbd_enable(sunkbd, 0);
302 fail3: serio_close(serio);
303 fail2: serio_set_drvdata(serio, NULL);
304 fail1: input_free_device(input_dev);
305 kfree(sunkbd);
306 return err;
307 }
308
309 /*
310 * sunkbd_disconnect() unregisters and closes behind us.
311 */
312
313 static void sunkbd_disconnect(struct serio *serio)
314 {
315 struct sunkbd *sunkbd = serio_get_drvdata(serio);
316
317 sunkbd_enable(sunkbd, 0);
318 input_unregister_device(sunkbd->dev);
319 serio_close(serio);
320 serio_set_drvdata(serio, NULL);
321 kfree(sunkbd);
322 }
323
324 static struct serio_device_id sunkbd_serio_ids[] = {
325 {
326 .type = SERIO_RS232,
327 .proto = SERIO_SUNKBD,
328 .id = SERIO_ANY,
329 .extra = SERIO_ANY,
330 },
331 {
332 .type = SERIO_RS232,
333 .proto = SERIO_UNKNOWN, /* sunkbd does probe */
334 .id = SERIO_ANY,
335 .extra = SERIO_ANY,
336 },
337 { 0 }
338 };
339
340 MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);
341
342 static struct serio_driver sunkbd_drv = {
343 .driver = {
344 .name = "sunkbd",
345 },
346 .description = DRIVER_DESC,
347 .id_table = sunkbd_serio_ids,
348 .interrupt = sunkbd_interrupt,
349 .connect = sunkbd_connect,
350 .disconnect = sunkbd_disconnect,
351 };
352
353 /*
354 * The functions for insering/removing us as a module.
355 */
356
357 static int __init sunkbd_init(void)
358 {
359 return serio_register_driver(&sunkbd_drv);
360 }
361
362 static void __exit sunkbd_exit(void)
363 {
364 serio_unregister_driver(&sunkbd_drv);
365 }
366
367 module_init(sunkbd_init);
368 module_exit(sunkbd_exit);
369
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