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, 0,
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 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, struct pt_regs *regs)
97 {
98 struct sunkbd* sunkbd = serio->private;
99
100 if (sunkbd->reset <= -1) { /* If cp[i] is 0xff, sunkbd->reset will stay -1. */
101 sunkbd->reset = data; /* The keyboard sends 0xff 0xff 0xID on powerup */
102 wake_up_interruptible(&sunkbd->wait);
103 goto out;
104 }
105
106 if (sunkbd->layout == -1) {
107 sunkbd->layout = data;
108 wake_up_interruptible(&sunkbd->wait);
109 goto out;
110 }
111
112 switch (data) {
113
114 case SUNKBD_RET_RESET:
115 schedule_work(&sunkbd->tq);
116 sunkbd->reset = -1;
117 break;
118
119 case SUNKBD_RET_LAYOUT:
120 sunkbd->layout = -1;
121 break;
122
123 case SUNKBD_RET_ALLUP: /* All keys released */
124 break;
125
126 default:
127 if (sunkbd->keycode[data & SUNKBD_KEY]) {
128 input_regs(&sunkbd->dev, regs);
129 input_report_key(&sunkbd->dev, sunkbd->keycode[data & SUNKBD_KEY], !(data & SUNKBD_RELEASE));
130 input_sync(&sunkbd->dev);
131 } else {
132 printk(KERN_WARNING "sunkbd.c: Unknown key (scancode %#x) %s.\n",
133 data & SUNKBD_KEY, data & SUNKBD_RELEASE ? "released" : "pressed");
134 }
135 }
136 out:
137 return IRQ_HANDLED;
138 }
139
140 /*
141 * sunkbd_event() handles events from the input module.
142 */
143
144 static int sunkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
145 {
146 struct sunkbd *sunkbd = dev->private;
147
148 switch (type) {
149
150 case EV_LED:
151
152 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
153 sunkbd->serio->write(sunkbd->serio,
154 (!!test_bit(LED_CAPSL, dev->led) << 3) | (!!test_bit(LED_SCROLLL, dev->led) << 2) |
155 (!!test_bit(LED_COMPOSE, dev->led) << 1) | !!test_bit(LED_NUML, dev->led));
156 return 0;
157
158 case EV_SND:
159
160 switch (code) {
161
162 case SND_CLICK:
163 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
164 return 0;
165
166 case SND_BELL:
167 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
168 return 0;
169 }
170
171 break;
172 }
173
174 return -1;
175 }
176
177 /*
178 * sunkbd_initialize() checks for a Sun keyboard attached, and determines
179 * its type.
180 */
181
182 static int sunkbd_initialize(struct sunkbd *sunkbd)
183 {
184 sunkbd->reset = -2;
185 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_RESET);
186 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
187 if (sunkbd->reset <0)
188 return -1;
189
190 sunkbd->type = sunkbd->reset;
191
192 if (sunkbd->type == 4) { /* Type 4 keyboard */
193 sunkbd->layout = -2;
194 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
195 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->layout >= 0, HZ/4);
196 if (sunkbd->layout < 0) return -1;
197 if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK) sunkbd->type = 5;
198 }
199
200 return 0;
201 }
202
203 /*
204 * sunkbd_reinit() sets leds and beeps to a state the computer remembers they
205 * were in.
206 */
207
208 static void sunkbd_reinit(void *data)
209 {
210 struct sunkbd *sunkbd = data;
211
212 wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
213
214 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_SETLED);
215 sunkbd->serio->write(sunkbd->serio,
216 (!!test_bit(LED_CAPSL, sunkbd->dev.led) << 3) | (!!test_bit(LED_SCROLLL, sunkbd->dev.led) << 2) |
217 (!!test_bit(LED_COMPOSE, sunkbd->dev.led) << 1) | !!test_bit(LED_NUML, sunkbd->dev.led));
218 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev.snd));
219 sunkbd->serio->write(sunkbd->serio, SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev.snd));
220 }
221
222 /*
223 * sunkbd_connect() probes for a Sun keyboard and fills the necessary structures.
224 */
225
226 static void sunkbd_connect(struct serio *serio, struct serio_driver *drv)
227 {
228 struct sunkbd *sunkbd;
229 int i;
230
231 if ((serio->type & SERIO_TYPE) != SERIO_RS232)
232 return;
233
234 if ((serio->type & SERIO_PROTO) && (serio->type & SERIO_PROTO) != SERIO_SUNKBD)
235 return;
236
237 if (!(sunkbd = kmalloc(sizeof(struct sunkbd), GFP_KERNEL)))
238 return;
239
240 memset(sunkbd, 0, sizeof(struct sunkbd));
241
242 init_input_dev(&sunkbd->dev);
243 init_waitqueue_head(&sunkbd->wait);
244
245 sunkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_SND) | BIT(EV_REP);
246 sunkbd->dev.ledbit[0] = BIT(LED_CAPSL) | BIT(LED_COMPOSE) | BIT(LED_SCROLLL) | BIT(LED_NUML);
247 sunkbd->dev.sndbit[0] = BIT(SND_CLICK) | BIT(SND_BELL);
248
249 sunkbd->serio = serio;
250
251 INIT_WORK(&sunkbd->tq, sunkbd_reinit, sunkbd);
252
253 sunkbd->dev.keycode = sunkbd->keycode;
254 sunkbd->dev.keycodesize = sizeof(unsigned char);
255 sunkbd->dev.keycodemax = ARRAY_SIZE(sunkbd_keycode);
256
257 sunkbd->dev.event = sunkbd_event;
258 sunkbd->dev.private = sunkbd;
259
260 serio->private = sunkbd;
261
262 if (serio_open(serio, drv)) {
263 kfree(sunkbd);
264 return;
265 }
266
267 if (sunkbd_initialize(sunkbd) < 0) {
268 serio_close(serio);
269 kfree(sunkbd);
270 return;
271 }
272
273 sprintf(sunkbd->name, "Sun Type %d keyboard", sunkbd->type);
274
275 memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));
276 for (i = 0; i < 128; i++)
277 set_bit(sunkbd->keycode[i], sunkbd->dev.keybit);
278 clear_bit(0, sunkbd->dev.keybit);
279
280 sprintf(sunkbd->phys, "%s/input0", serio->phys);
281
282 sunkbd->dev.name = sunkbd->name;
283 sunkbd->dev.phys = sunkbd->phys;
284 sunkbd->dev.id.bustype = BUS_RS232;
285 sunkbd->dev.id.vendor = SERIO_SUNKBD;
286 sunkbd->dev.id.product = sunkbd->type;
287 sunkbd->dev.id.version = 0x0100;
288 sunkbd->dev.dev = &serio->dev;
289
290 input_register_device(&sunkbd->dev);
291
292 printk(KERN_INFO "input: %s on %s\n", sunkbd->name, serio->phys);
293 }
294
295 /*
296 * sunkbd_disconnect() unregisters and closes behind us.
297 */
298
299 static void sunkbd_disconnect(struct serio *serio)
300 {
301 struct sunkbd *sunkbd = serio->private;
302 input_unregister_device(&sunkbd->dev);
303 serio_close(serio);
304 kfree(sunkbd);
305 }
306
307 static struct serio_driver sunkbd_drv = {
308 .driver = {
309 .name = "sunkbd",
310 },
311 .description = DRIVER_DESC,
312 .interrupt = sunkbd_interrupt,
313 .connect = sunkbd_connect,
314 .disconnect = sunkbd_disconnect,
315 };
316
317 /*
318 * The functions for insering/removing us as a module.
319 */
320
321 int __init sunkbd_init(void)
322 {
323 serio_register_driver(&sunkbd_drv);
324 return 0;
325 }
326
327 void __exit sunkbd_exit(void)
328 {
329 serio_unregister_driver(&sunkbd_drv);
330 }
331
332 module_init(sunkbd_init);
333 module_exit(sunkbd_exit);
334
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