1 /*
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (C) 1999-2002 Harald Koerfgen <hkoerfg@web.de>
8 * Copyright (C) 2001, 2002, 2003, 2004 Maciej W. Rozycki
9 */
10
11 #include <linux/config.h>
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/tty.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/kbd_ll.h>
20 #include <linux/kbd_kern.h>
21 #include <linux/vt_kern.h>
22
23 #include <asm/keyboard.h>
24 #include <asm/dec/tc.h>
25 #include <asm/dec/machtype.h>
26 #include <asm/dec/serial.h>
27
28 #include "lk201.h"
29
30 /*
31 * Only handle DECstations that have an LK201 interface.
32 * Maxine uses LK501 at the Access.Bus and various DECsystems
33 * have no keyboard interface at all.
34 */
35 #define LK_IFACE (mips_machtype == MACH_DS23100 || \
36 mips_machtype == MACH_DS5000_200 || \
37 mips_machtype == MACH_DS5000_1XX || \
38 mips_machtype == MACH_DS5000_2X0)
39 /*
40 * These use the Z8530 SCC. Others use the DZ11.
41 */
42 #define LK_IFACE_ZS (mips_machtype == MACH_DS5000_1XX || \
43 mips_machtype == MACH_DS5000_2X0)
44
45 /* Simple translation table for the SysRq keys */
46
47 #ifdef CONFIG_MAGIC_SYSRQ
48 /*
49 * Actually no translation at all, at least until we figure out
50 * how to define SysRq for LK201 and friends. --macro
51 */
52 unsigned char lk201_sysrq_xlate[128];
53 unsigned char *kbd_sysrq_xlate = lk201_sysrq_xlate;
54
55 unsigned char kbd_sysrq_key = -1;
56 #endif
57
58 #define KEYB_LINE 3
59
60 static int __init lk201_init(void *);
61 static void __init lk201_info(void *);
62 static void lk201_rx_char(unsigned char, unsigned char);
63
64 static struct dec_serial_hook lk201_hook = {
65 .init_channel = lk201_init,
66 .init_info = lk201_info,
67 .rx_char = NULL,
68 .poll_rx_char = NULL,
69 .poll_tx_char = NULL,
70 .cflags = B4800 | CS8 | CSTOPB | CLOCAL,
71 };
72
73 /*
74 * This is used during keyboard initialisation
75 */
76 static unsigned char lk201_reset_string[] = {
77 LK_CMD_SET_DEFAULTS,
78 LK_CMD_MODE(LK_MODE_RPT_DOWN, 1),
79 LK_CMD_MODE(LK_MODE_RPT_DOWN, 2),
80 LK_CMD_MODE(LK_MODE_RPT_DOWN, 3),
81 LK_CMD_MODE(LK_MODE_RPT_DOWN, 4),
82 LK_CMD_MODE(LK_MODE_DOWN_UP, 5),
83 LK_CMD_MODE(LK_MODE_DOWN_UP, 6),
84 LK_CMD_MODE(LK_MODE_RPT_DOWN, 7),
85 LK_CMD_MODE(LK_MODE_RPT_DOWN, 8),
86 LK_CMD_MODE(LK_MODE_RPT_DOWN, 9),
87 LK_CMD_MODE(LK_MODE_RPT_DOWN, 10),
88 LK_CMD_MODE(LK_MODE_RPT_DOWN, 11),
89 LK_CMD_MODE(LK_MODE_RPT_DOWN, 12),
90 LK_CMD_MODE(LK_MODE_DOWN, 13),
91 LK_CMD_MODE(LK_MODE_RPT_DOWN, 14),
92 LK_CMD_DIS_KEYCLK,
93 LK_CMD_ENB_BELL, LK_PARAM_VOLUME(4),
94 };
95
96 static void *lk201_handle;
97
98 static int lk201_send(unsigned char ch)
99 {
100 if (lk201_hook.poll_tx_char(lk201_handle, ch)) {
101 printk(KERN_ERR "lk201: transmit timeout\n");
102 return -EIO;
103 }
104 return 0;
105 }
106
107 static inline int lk201_get_id(void)
108 {
109 return lk201_send(LK_CMD_REQ_ID);
110 }
111
112 static int lk201_reset(void)
113 {
114 int i, r;
115
116 for (i = 0; i < sizeof(lk201_reset_string); i++) {
117 r = lk201_send(lk201_reset_string[i]);
118 if (r < 0)
119 return r;
120 }
121 return 0;
122 }
123
124 static void lk201_report(unsigned char id[6])
125 {
126 char *report = "lk201: keyboard attached, ";
127
128 switch (id[2]) {
129 case LK_STAT_PWRUP_OK:
130 printk(KERN_INFO "%sself-test OK\n", report);
131 break;
132 case LK_STAT_PWRUP_KDOWN:
133 /* The keyboard will resend the power-up ID
134 after all keys are released, so we don't
135 bother handling the error specially. Still
136 there may be a short-circuit inside.
137 */
138 printk(KERN_ERR "%skey down (stuck?), code: 0x%02x\n",
139 report, id[3]);
140 break;
141 case LK_STAT_PWRUP_ERROR:
142 printk(KERN_ERR "%sself-test failure\n", report);
143 break;
144 default:
145 printk(KERN_ERR "%sunknown error: 0x%02x\n",
146 report, id[2]);
147 }
148 }
149
150 static void lk201_id(unsigned char id[6])
151 {
152 /*
153 * Report whether there is an LK201 or an LK401
154 * The LK401 has ALT keys...
155 */
156 switch (id[4]) {
157 case 1:
158 printk(KERN_INFO "lk201: LK201 detected\n");
159 break;
160 case 2:
161 printk(KERN_INFO "lk201: LK401 detected\n");
162 break;
163 case 3:
164 printk(KERN_INFO "lk201: LK443 detected\n");
165 break;
166 case 4:
167 printk(KERN_INFO "lk201: LK421 detected\n");
168 break;
169 default:
170 printk(KERN_WARNING
171 "lk201: unknown keyboard detected, ID %d\n", id[4]);
172 printk(KERN_WARNING "lk201: ... please report to "
173 "<linux-mips@linux-mips.org>\n");
174 }
175 }
176
177 #define DEFAULT_KEYB_REP_DELAY (250/5) /* [5ms] */
178 #define DEFAULT_KEYB_REP_RATE 30 /* [cps] */
179
180 static struct kbd_repeat kbdrate = {
181 DEFAULT_KEYB_REP_DELAY,
182 DEFAULT_KEYB_REP_RATE
183 };
184
185 static void parse_kbd_rate(struct kbd_repeat *r)
186 {
187 if (r->delay <= 0)
188 r->delay = kbdrate.delay;
189 if (r->rate <= 0)
190 r->rate = kbdrate.rate;
191
192 if (r->delay < 5)
193 r->delay = 5;
194 if (r->delay > 630)
195 r->delay = 630;
196 if (r->rate < 12)
197 r->rate = 12;
198 if (r->rate > 127)
199 r->rate = 127;
200 if (r->rate == 125)
201 r->rate = 124;
202 }
203
204 static int write_kbd_rate(struct kbd_repeat *rep)
205 {
206 int delay, rate;
207 int i;
208
209 delay = rep->delay / 5;
210 rate = rep->rate;
211 for (i = 0; i < 4; i++) {
212 if (lk201_hook.poll_tx_char(lk201_handle,
213 LK_CMD_RPT_RATE(i)))
214 return 1;
215 if (lk201_hook.poll_tx_char(lk201_handle,
216 LK_PARAM_DELAY(delay)))
217 return 1;
218 if (lk201_hook.poll_tx_char(lk201_handle,
219 LK_PARAM_RATE(rate)))
220 return 1;
221 }
222 return 0;
223 }
224
225 static int lk201_kbd_rate(struct kbd_repeat *rep)
226 {
227 if (rep == NULL)
228 return -EINVAL;
229
230 parse_kbd_rate(rep);
231
232 if (write_kbd_rate(rep)) {
233 memcpy(rep, &kbdrate, sizeof(struct kbd_repeat));
234 return -EIO;
235 }
236
237 memcpy(&kbdrate, rep, sizeof(struct kbd_repeat));
238
239 return 0;
240 }
241
242 static void lk201_kd_mksound(unsigned int hz, unsigned int ticks)
243 {
244 if (!ticks)
245 return;
246
247 /*
248 * Can't set frequency and we "approximate"
249 * duration by volume. ;-)
250 */
251 ticks /= HZ / 32;
252 if (ticks > 7)
253 ticks = 7;
254 ticks = 7 - ticks;
255
256 if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_ENB_BELL))
257 return;
258 if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_VOLUME(ticks)))
259 return;
260 if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_BELL))
261 return;
262 }
263
264 void kbd_leds(unsigned char leds)
265 {
266 unsigned char l = 0;
267
268 if (!lk201_handle) /* FIXME */
269 return;
270
271 /* FIXME -- Only Hold and Lock LEDs for now. --macro */
272 if (leds & LED_SCR)
273 l |= LK_LED_HOLD;
274 if (leds & LED_CAP)
275 l |= LK_LED_LOCK;
276
277 if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_LEDS_ON))
278 return;
279 if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_LED_MASK(l)))
280 return;
281 if (lk201_hook.poll_tx_char(lk201_handle, LK_CMD_LEDS_OFF))
282 return;
283 if (lk201_hook.poll_tx_char(lk201_handle, LK_PARAM_LED_MASK(~l)))
284 return;
285 }
286
287 int kbd_setkeycode(unsigned int scancode, unsigned int keycode)
288 {
289 return -EINVAL;
290 }
291
292 int kbd_getkeycode(unsigned int scancode)
293 {
294 return -EINVAL;
295 }
296
297 int kbd_translate(unsigned char scancode, unsigned char *keycode,
298 char raw_mode)
299 {
300 *keycode = scancode;
301 return 1;
302 }
303
304 char kbd_unexpected_up(unsigned char keycode)
305 {
306 return 0x80;
307 }
308
309 static void lk201_rx_char(unsigned char ch, unsigned char fl)
310 {
311 static unsigned char id[6];
312 static int id_i;
313
314 static int shift_state = 0;
315 static int prev_scancode;
316 unsigned char c = scancodeRemap[ch];
317
318 if (fl != TTY_NORMAL && fl != TTY_OVERRUN) {
319 printk(KERN_ERR "lk201: keyboard receive error: 0x%02x\n", fl);
320 return;
321 }
322
323 /* Assume this is a power-up ID. */
324 if (ch == LK_STAT_PWRUP_ID && !id_i) {
325 id[id_i++] = ch;
326 return;
327 }
328
329 /* Handle the power-up sequence. */
330 if (id_i) {
331 id[id_i++] = ch;
332 if (id_i == 4) {
333 /* OK, the power-up concluded. */
334 lk201_report(id);
335 if (id[2] == LK_STAT_PWRUP_OK)
336 lk201_get_id();
337 else {
338 id_i = 0;
339 printk(KERN_ERR "lk201: keyboard power-up "
340 "error, skipping initialization\n");
341 }
342 } else if (id_i == 6) {
343 /* We got the ID; report it and start operation. */
344 id_i = 0;
345 lk201_id(id);
346 lk201_reset();
347 }
348 return;
349 }
350
351 /* Everything else is a scancode/status response. */
352 id_i = 0;
353 switch (ch) {
354 case LK_STAT_RESUME_ERR:
355 case LK_STAT_ERROR:
356 case LK_STAT_INHIBIT_ACK:
357 case LK_STAT_TEST_ACK:
358 case LK_STAT_MODE_KEYDOWN:
359 case LK_STAT_MODE_ACK:
360 break;
361 case LK_KEY_LOCK:
362 shift_state ^= LK_LOCK;
363 handle_scancode(c, (shift_state & LK_LOCK) ? 1 : 0);
364 break;
365 case LK_KEY_SHIFT:
366 shift_state ^= LK_SHIFT;
367 handle_scancode(c, (shift_state & LK_SHIFT) ? 1 : 0);
368 break;
369 case LK_KEY_CTRL:
370 shift_state ^= LK_CTRL;
371 handle_scancode(c, (shift_state & LK_CTRL) ? 1 : 0);
372 break;
373 case LK_KEY_COMP:
374 shift_state ^= LK_COMP;
375 handle_scancode(c, (shift_state & LK_COMP) ? 1 : 0);
376 break;
377 case LK_KEY_RELEASE:
378 if (shift_state & LK_SHIFT)
379 handle_scancode(scancodeRemap[LK_KEY_SHIFT], 0);
380 if (shift_state & LK_CTRL)
381 handle_scancode(scancodeRemap[LK_KEY_CTRL], 0);
382 if (shift_state & LK_COMP)
383 handle_scancode(scancodeRemap[LK_KEY_COMP], 0);
384 if (shift_state & LK_LOCK)
385 handle_scancode(scancodeRemap[LK_KEY_LOCK], 0);
386 shift_state = 0;
387 break;
388 case LK_KEY_REPEAT:
389 handle_scancode(prev_scancode, 1);
390 break;
391 default:
392 prev_scancode = c;
393 handle_scancode(c, 1);
394 break;
395 }
396 tasklet_schedule(&keyboard_tasklet);
397 }
398
399 static void __init lk201_info(void *handle)
400 {
401 }
402
403 static int __init lk201_init(void *handle)
404 {
405 /* First install handlers. */
406 lk201_handle = handle;
407 kbd_rate = lk201_kbd_rate;
408 kd_mksound = lk201_kd_mksound;
409
410 lk201_hook.rx_char = lk201_rx_char;
411
412 /* Then just issue a reset -- the handlers will do the rest. */
413 lk201_send(LK_CMD_POWER_UP);
414
415 return 0;
416 }
417
418 void __init kbd_init_hw(void)
419 {
420 /* Maxine uses LK501 at the Access.Bus. */
421 if (!LK_IFACE)
422 return;
423
424 printk(KERN_INFO "lk201: DECstation LK keyboard driver v0.05.\n");
425
426 if (LK_IFACE_ZS) {
427 /*
428 * kbd_init_hw() is being called before
429 * rs_init() so just register the kbd hook
430 * and let zs_init do the rest :-)
431 */
432 if (!register_dec_serial_hook(KEYB_LINE, &lk201_hook))
433 unregister_dec_serial_hook(KEYB_LINE);
434 } else {
435 /*
436 * TODO: modify dz.c to allow similar hooks
437 * for LK201 handling on DS2100, DS3100, and DS5000/200
438 */
439 printk(KERN_ERR "lk201: support for DZ11 not yet ready.\n");
440 }
441 }
442
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