Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * LCD, LED and Button interface for Cobalt | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 1996, 1997 by Andrew Bose | |
9 | * | |
10 | * Linux kernel version history: | |
11 | * March 2001: Ported from 2.0.34 by Liam Davies | |
12 | * | |
13 | */ | |
14 | ||
15 | #define RTC_IO_EXTENT 0x10 /*Only really two ports, but... */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/miscdevice.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/fcntl.h> | |
23 | #include <linux/mc146818rtc.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/delay.h> | |
27 | ||
28 | #include <asm/io.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/system.h> | |
31 | #include <linux/delay.h> | |
32 | ||
33 | #include "lcd.h" | |
34 | ||
35 | static DEFINE_SPINLOCK(lcd_lock); | |
36 | ||
37 | static int lcd_ioctl(struct inode *inode, struct file *file, | |
38 | unsigned int cmd, unsigned long arg); | |
39 | ||
40 | static unsigned int lcd_present = 1; | |
41 | ||
42 | /* used in arch/mips/cobalt/reset.c */ | |
43 | int led_state = 0; | |
44 | ||
45 | #if defined(CONFIG_TULIP) && 0 | |
46 | ||
47 | #define MAX_INTERFACES 8 | |
48 | static linkcheck_func_t linkcheck_callbacks[MAX_INTERFACES]; | |
49 | static void *linkcheck_cookies[MAX_INTERFACES]; | |
50 | ||
51 | int lcd_register_linkcheck_func(int iface_num, void *func, void *cookie) | |
52 | { | |
53 | if (iface_num < 0 || | |
54 | iface_num >= MAX_INTERFACES || | |
55 | linkcheck_callbacks[iface_num] != NULL) | |
56 | return -1; | |
57 | linkcheck_callbacks[iface_num] = (linkcheck_func_t) func; | |
58 | linkcheck_cookies[iface_num] = cookie; | |
59 | return 0; | |
60 | } | |
61 | #endif | |
62 | ||
63 | static int lcd_ioctl(struct inode *inode, struct file *file, | |
64 | unsigned int cmd, unsigned long arg) | |
65 | { | |
66 | struct lcd_display button_display; | |
67 | unsigned long address, a; | |
68 | ||
69 | switch (cmd) { | |
70 | case LCD_On: | |
71 | udelay(150); | |
72 | BusyCheck(); | |
73 | LCDWriteInst(0x0F); | |
74 | break; | |
75 | ||
76 | case LCD_Off: | |
77 | udelay(150); | |
78 | BusyCheck(); | |
79 | LCDWriteInst(0x08); | |
80 | break; | |
81 | ||
82 | case LCD_Reset: | |
83 | udelay(150); | |
84 | LCDWriteInst(0x3F); | |
85 | udelay(150); | |
86 | LCDWriteInst(0x3F); | |
87 | udelay(150); | |
88 | LCDWriteInst(0x3F); | |
89 | udelay(150); | |
90 | LCDWriteInst(0x3F); | |
91 | udelay(150); | |
92 | LCDWriteInst(0x01); | |
93 | udelay(150); | |
94 | LCDWriteInst(0x06); | |
95 | break; | |
96 | ||
97 | case LCD_Clear: | |
98 | udelay(150); | |
99 | BusyCheck(); | |
100 | LCDWriteInst(0x01); | |
101 | break; | |
102 | ||
103 | case LCD_Cursor_Left: | |
104 | udelay(150); | |
105 | BusyCheck(); | |
106 | LCDWriteInst(0x10); | |
107 | break; | |
108 | ||
109 | case LCD_Cursor_Right: | |
110 | udelay(150); | |
111 | BusyCheck(); | |
112 | LCDWriteInst(0x14); | |
113 | break; | |
114 | ||
115 | case LCD_Cursor_Off: | |
116 | udelay(150); | |
117 | BusyCheck(); | |
118 | LCDWriteInst(0x0C); | |
119 | break; | |
120 | ||
121 | case LCD_Cursor_On: | |
122 | udelay(150); | |
123 | BusyCheck(); | |
124 | LCDWriteInst(0x0F); | |
125 | break; | |
126 | ||
127 | case LCD_Blink_Off: | |
128 | udelay(150); | |
129 | BusyCheck(); | |
130 | LCDWriteInst(0x0E); | |
131 | break; | |
132 | ||
133 | case LCD_Get_Cursor_Pos:{ | |
134 | struct lcd_display display; | |
135 | ||
136 | udelay(150); | |
137 | BusyCheck(); | |
138 | display.cursor_address = (LCDReadInst); | |
139 | display.cursor_address = | |
140 | (display.cursor_address & 0x07F); | |
141 | if (copy_to_user | |
142 | ((struct lcd_display *) arg, &display, | |
143 | sizeof(struct lcd_display))) | |
144 | return -EFAULT; | |
145 | ||
146 | break; | |
147 | } | |
148 | ||
149 | ||
150 | case LCD_Set_Cursor_Pos:{ | |
151 | struct lcd_display display; | |
152 | ||
153 | if (copy_from_user | |
154 | (&display, (struct lcd_display *) arg, | |
155 | sizeof(struct lcd_display))) | |
156 | return -EFAULT; | |
157 | ||
158 | a = (display.cursor_address | kLCD_Addr); | |
159 | ||
160 | udelay(150); | |
161 | BusyCheck(); | |
162 | LCDWriteInst(a); | |
163 | ||
164 | break; | |
165 | } | |
166 | ||
167 | case LCD_Get_Cursor:{ | |
168 | struct lcd_display display; | |
169 | ||
170 | udelay(150); | |
171 | BusyCheck(); | |
172 | display.character = LCDReadData; | |
173 | ||
174 | if (copy_to_user | |
175 | ((struct lcd_display *) arg, &display, | |
176 | sizeof(struct lcd_display))) | |
177 | return -EFAULT; | |
178 | udelay(150); | |
179 | BusyCheck(); | |
180 | LCDWriteInst(0x10); | |
181 | ||
182 | break; | |
183 | } | |
184 | ||
185 | case LCD_Set_Cursor:{ | |
186 | struct lcd_display display; | |
187 | ||
188 | if (copy_from_user | |
189 | (&display, (struct lcd_display *) arg, | |
190 | sizeof(struct lcd_display))) | |
191 | return -EFAULT; | |
192 | ||
193 | udelay(150); | |
194 | BusyCheck(); | |
195 | LCDWriteData(display.character); | |
196 | udelay(150); | |
197 | BusyCheck(); | |
198 | LCDWriteInst(0x10); | |
199 | ||
200 | break; | |
201 | } | |
202 | ||
203 | ||
204 | case LCD_Disp_Left: | |
205 | udelay(150); | |
206 | BusyCheck(); | |
207 | LCDWriteInst(0x18); | |
208 | break; | |
209 | ||
210 | case LCD_Disp_Right: | |
211 | udelay(150); | |
212 | BusyCheck(); | |
213 | LCDWriteInst(0x1C); | |
214 | break; | |
215 | ||
216 | case LCD_Home: | |
217 | udelay(150); | |
218 | BusyCheck(); | |
219 | LCDWriteInst(0x02); | |
220 | break; | |
221 | ||
222 | case LCD_Write:{ | |
223 | struct lcd_display display; | |
224 | unsigned int index; | |
225 | ||
226 | ||
227 | if (copy_from_user | |
228 | (&display, (struct lcd_display *) arg, | |
229 | sizeof(struct lcd_display))) | |
230 | return -EFAULT; | |
231 | ||
232 | udelay(150); | |
233 | BusyCheck(); | |
234 | LCDWriteInst(0x80); | |
235 | udelay(150); | |
236 | BusyCheck(); | |
237 | ||
238 | for (index = 0; index < (display.size1); index++) { | |
239 | udelay(150); | |
240 | BusyCheck(); | |
241 | LCDWriteData(display.line1[index]); | |
242 | BusyCheck(); | |
243 | } | |
244 | ||
245 | udelay(150); | |
246 | BusyCheck(); | |
247 | LCDWriteInst(0xC0); | |
248 | udelay(150); | |
249 | BusyCheck(); | |
250 | for (index = 0; index < (display.size2); index++) { | |
251 | udelay(150); | |
252 | BusyCheck(); | |
253 | LCDWriteData(display.line2[index]); | |
254 | } | |
255 | ||
256 | break; | |
257 | } | |
258 | ||
259 | case LCD_Read:{ | |
260 | struct lcd_display display; | |
261 | ||
262 | BusyCheck(); | |
263 | for (address = kDD_R00; address <= kDD_R01; | |
264 | address++) { | |
265 | a = (address | kLCD_Addr); | |
266 | ||
267 | udelay(150); | |
268 | BusyCheck(); | |
269 | LCDWriteInst(a); | |
270 | udelay(150); | |
271 | BusyCheck(); | |
272 | display.line1[address] = LCDReadData; | |
273 | } | |
274 | ||
275 | display.line1[0x27] = '\0'; | |
276 | ||
277 | for (address = kDD_R10; address <= kDD_R11; | |
278 | address++) { | |
279 | a = (address | kLCD_Addr); | |
280 | ||
281 | udelay(150); | |
282 | BusyCheck(); | |
283 | LCDWriteInst(a); | |
284 | ||
285 | udelay(150); | |
286 | BusyCheck(); | |
287 | display.line2[address - 0x40] = | |
288 | LCDReadData; | |
289 | } | |
290 | ||
291 | display.line2[0x27] = '\0'; | |
292 | ||
293 | if (copy_to_user | |
294 | ((struct lcd_display *) arg, &display, | |
295 | sizeof(struct lcd_display))) | |
296 | return -EFAULT; | |
297 | break; | |
298 | } | |
299 | ||
300 | // set all GPIO leds to led_display.leds | |
301 | ||
302 | case LED_Set:{ | |
303 | struct lcd_display led_display; | |
304 | ||
305 | ||
306 | if (copy_from_user | |
307 | (&led_display, (struct lcd_display *) arg, | |
308 | sizeof(struct lcd_display))) | |
309 | return -EFAULT; | |
310 | ||
311 | led_state = led_display.leds; | |
312 | LEDSet(led_state); | |
313 | ||
314 | break; | |
315 | } | |
316 | ||
317 | ||
318 | // set only bit led_display.leds | |
319 | ||
320 | case LED_Bit_Set:{ | |
321 | unsigned int i; | |
322 | int bit = 1; | |
323 | struct lcd_display led_display; | |
324 | ||
325 | ||
326 | if (copy_from_user | |
327 | (&led_display, (struct lcd_display *) arg, | |
328 | sizeof(struct lcd_display))) | |
329 | return -EFAULT; | |
330 | ||
331 | for (i = 0; i < (int) led_display.leds; i++) { | |
332 | bit = 2 * bit; | |
333 | } | |
334 | ||
335 | led_state = led_state | bit; | |
336 | LEDSet(led_state); | |
337 | break; | |
338 | } | |
339 | ||
340 | // clear only bit led_display.leds | |
341 | ||
342 | case LED_Bit_Clear:{ | |
343 | unsigned int i; | |
344 | int bit = 1; | |
345 | struct lcd_display led_display; | |
346 | ||
347 | ||
348 | if (copy_from_user | |
349 | (&led_display, (struct lcd_display *) arg, | |
350 | sizeof(struct lcd_display))) | |
351 | return -EFAULT; | |
352 | ||
353 | for (i = 0; i < (int) led_display.leds; i++) { | |
354 | bit = 2 * bit; | |
355 | } | |
356 | ||
357 | led_state = led_state & ~bit; | |
358 | LEDSet(led_state); | |
359 | break; | |
360 | } | |
361 | ||
362 | ||
363 | case BUTTON_Read:{ | |
364 | button_display.buttons = GPIRead; | |
365 | if (copy_to_user | |
366 | ((struct lcd_display *) arg, &button_display, | |
367 | sizeof(struct lcd_display))) | |
368 | return -EFAULT; | |
369 | break; | |
370 | } | |
371 | ||
372 | case LINK_Check:{ | |
373 | button_display.buttons = | |
374 | *((volatile unsigned long *) (0xB0100060)); | |
375 | if (copy_to_user | |
376 | ((struct lcd_display *) arg, &button_display, | |
377 | sizeof(struct lcd_display))) | |
378 | return -EFAULT; | |
379 | break; | |
380 | } | |
381 | ||
382 | case LINK_Check_2:{ | |
383 | int iface_num; | |
384 | ||
385 | /* panel-utils should pass in the desired interface status is wanted for | |
386 | * in "buttons" of the structure. We will set this to non-zero if the | |
387 | * link is in fact up for the requested interface. --DaveM | |
388 | */ | |
389 | if (copy_from_user | |
390 | (&button_display, (struct lcd_display *) arg, | |
391 | sizeof(button_display))) | |
392 | return -EFAULT; | |
393 | iface_num = button_display.buttons; | |
394 | #if defined(CONFIG_TULIP) && 0 | |
395 | if (iface_num >= 0 && | |
396 | iface_num < MAX_INTERFACES && | |
397 | linkcheck_callbacks[iface_num] != NULL) { | |
398 | button_display.buttons = | |
399 | linkcheck_callbacks[iface_num] | |
400 | (linkcheck_cookies[iface_num]); | |
401 | } else | |
402 | #endif | |
403 | button_display.buttons = 0; | |
404 | ||
405 | if (__copy_to_user | |
406 | ((struct lcd_display *) arg, &button_display, | |
407 | sizeof(struct lcd_display))) | |
408 | return -EFAULT; | |
409 | break; | |
410 | } | |
411 | ||
412 | // Erase the flash | |
413 | ||
414 | case FLASH_Erase:{ | |
415 | ||
416 | int ctr = 0; | |
417 | ||
418 | if ( !capable(CAP_SYS_ADMIN) ) return -EPERM; | |
419 | ||
420 | pr_info(LCD "Erasing Flash\n"); | |
421 | ||
422 | // Chip Erase Sequence | |
423 | WRITE_FLASH(kFlash_Addr1, kFlash_Data1); | |
424 | WRITE_FLASH(kFlash_Addr2, kFlash_Data2); | |
425 | WRITE_FLASH(kFlash_Addr1, kFlash_Erase3); | |
426 | WRITE_FLASH(kFlash_Addr1, kFlash_Data1); | |
427 | WRITE_FLASH(kFlash_Addr2, kFlash_Data2); | |
428 | WRITE_FLASH(kFlash_Addr1, kFlash_Erase6); | |
429 | ||
430 | while ((!dqpoll(0x00000000, 0xFF)) | |
431 | && (!timeout(0x00000000))) { | |
432 | ctr++; | |
433 | } | |
434 | ||
435 | if (READ_FLASH(0x07FFF0) == 0xFF) { | |
436 | pr_info(LCD "Erase Successful\n"); | |
437 | } else if (timeout) { | |
438 | pr_info(LCD "Erase Timed Out\n"); | |
439 | } | |
440 | ||
441 | break; | |
442 | } | |
443 | ||
444 | // burn the flash | |
445 | ||
446 | case FLASH_Burn:{ | |
447 | ||
448 | volatile unsigned long burn_addr; | |
449 | unsigned long flags; | |
450 | unsigned int i, index; | |
451 | unsigned char *rom; | |
452 | ||
453 | ||
454 | struct lcd_display display; | |
455 | ||
456 | if ( !capable(CAP_SYS_ADMIN) ) return -EPERM; | |
457 | ||
458 | if (copy_from_user | |
459 | (&display, (struct lcd_display *) arg, | |
460 | sizeof(struct lcd_display))) | |
461 | return -EFAULT; | |
462 | rom = (unsigned char *) kmalloc((128), GFP_ATOMIC); | |
463 | if (rom == NULL) { | |
464 | printk(KERN_ERR LCD "kmalloc() failed in %s\n", | |
465 | __FUNCTION__); | |
466 | return -ENOMEM; | |
467 | } | |
468 | ||
469 | pr_info(LCD "Starting Flash burn\n"); | |
470 | for (i = 0; i < FLASH_SIZE; i = i + 128) { | |
471 | ||
472 | if (copy_from_user | |
473 | (rom, display.RomImage + i, 128)) { | |
474 | kfree(rom); | |
475 | return -EFAULT; | |
476 | } | |
477 | burn_addr = kFlashBase + i; | |
478 | spin_lock_irqsave(&lcd_lock, flags); | |
479 | for (index = 0; index < (128); index++) { | |
480 | ||
481 | WRITE_FLASH(kFlash_Addr1, | |
482 | kFlash_Data1); | |
483 | WRITE_FLASH(kFlash_Addr2, | |
484 | kFlash_Data2); | |
485 | WRITE_FLASH(kFlash_Addr1, | |
486 | kFlash_Prog); | |
487 | *((volatile unsigned char *)burn_addr) = | |
488 | (volatile unsigned char) rom[index]; | |
489 | ||
490 | while ((!dqpoll (burn_addr, | |
491 | (volatile unsigned char) | |
492 | rom[index])) && | |
493 | (!timeout(burn_addr))) { } | |
494 | burn_addr++; | |
495 | } | |
496 | spin_unlock_irqrestore(&lcd_lock, flags); | |
497 | if (* ((volatile unsigned char *) | |
498 | (burn_addr - 1)) == | |
499 | (volatile unsigned char) | |
500 | rom[index - 1]) { | |
501 | } else if (timeout) { | |
502 | pr_info(LCD "Flash burn timed out\n"); | |
503 | } | |
504 | ||
505 | ||
506 | } | |
507 | kfree(rom); | |
508 | ||
509 | pr_info(LCD "Flash successfully burned\n"); | |
510 | ||
511 | break; | |
512 | } | |
513 | ||
514 | // read the flash all at once | |
515 | ||
516 | case FLASH_Read:{ | |
517 | ||
518 | unsigned char *user_bytes; | |
519 | volatile unsigned long read_addr; | |
520 | unsigned int i; | |
521 | ||
522 | user_bytes = | |
523 | &(((struct lcd_display *) arg)->RomImage[0]); | |
524 | ||
525 | if (!access_ok | |
526 | (VERIFY_WRITE, user_bytes, FLASH_SIZE)) | |
527 | return -EFAULT; | |
528 | ||
529 | pr_info(LCD "Reading Flash"); | |
530 | for (i = 0; i < FLASH_SIZE; i++) { | |
531 | unsigned char tmp_byte; | |
532 | read_addr = kFlashBase + i; | |
533 | tmp_byte = | |
534 | *((volatile unsigned char *) | |
535 | read_addr); | |
536 | if (__put_user(tmp_byte, &user_bytes[i])) | |
537 | return -EFAULT; | |
538 | } | |
539 | ||
540 | ||
541 | break; | |
542 | } | |
543 | ||
544 | default: | |
545 | return -EINVAL; | |
546 | ||
547 | } | |
548 | ||
549 | return 0; | |
550 | ||
551 | } | |
552 | ||
553 | static int lcd_open(struct inode *inode, struct file *file) | |
554 | { | |
555 | if (!lcd_present) | |
556 | return -ENXIO; | |
557 | else | |
558 | return 0; | |
559 | } | |
560 | ||
561 | /* Only RESET or NEXT counts as button pressed */ | |
562 | ||
563 | static inline int button_pressed(void) | |
564 | { | |
565 | unsigned long buttons = GPIRead; | |
566 | ||
567 | if ((buttons == BUTTON_Next) || (buttons == BUTTON_Next_B) | |
568 | || (buttons == BUTTON_Reset_B)) | |
569 | return buttons; | |
570 | return 0; | |
571 | } | |
572 | ||
573 | /* LED daemon sits on this and we wake him up once a key is pressed. */ | |
574 | ||
575 | static int lcd_waiters = 0; | |
576 | ||
c4ed38a0 RB |
577 | static ssize_t lcd_read(struct file *file, char *buf, |
578 | size_t count, loff_t *ofs) | |
1da177e4 LT |
579 | { |
580 | long buttons_now; | |
581 | ||
582 | if (lcd_waiters > 0) | |
583 | return -EINVAL; | |
584 | ||
585 | lcd_waiters++; | |
586 | while (((buttons_now = (long) button_pressed()) == 0) && | |
587 | !(signal_pending(current))) { | |
588 | msleep_interruptible(2000); | |
589 | } | |
590 | lcd_waiters--; | |
591 | ||
592 | if (signal_pending(current)) | |
593 | return -ERESTARTSYS; | |
594 | return buttons_now; | |
595 | } | |
596 | ||
597 | /* | |
598 | * The various file operations we support. | |
599 | */ | |
600 | ||
62322d25 | 601 | static const struct file_operations lcd_fops = { |
1da177e4 LT |
602 | .read = lcd_read, |
603 | .ioctl = lcd_ioctl, | |
604 | .open = lcd_open, | |
605 | }; | |
606 | ||
607 | static struct miscdevice lcd_dev = { | |
608 | MISC_DYNAMIC_MINOR, | |
609 | "lcd", | |
610 | &lcd_fops | |
611 | }; | |
612 | ||
613 | static int lcd_init(void) | |
614 | { | |
cf85d5ca | 615 | int ret; |
1da177e4 LT |
616 | unsigned long data; |
617 | ||
618 | pr_info("%s\n", LCD_DRIVER); | |
cf85d5ca CL |
619 | ret = misc_register(&lcd_dev); |
620 | if (ret) { | |
621 | printk(KERN_WARNING LCD "Unable to register misc device.\n"); | |
622 | return ret; | |
623 | } | |
1da177e4 LT |
624 | |
625 | /* Check region? Naaah! Just snarf it up. */ | |
626 | /* request_region(RTC_PORT(0), RTC_IO_EXTENT, "lcd");*/ | |
627 | ||
628 | udelay(150); | |
629 | data = LCDReadData; | |
630 | if ((data & 0x000000FF) == (0x00)) { | |
631 | lcd_present = 0; | |
632 | pr_info(LCD "LCD Not Present\n"); | |
633 | } else { | |
634 | lcd_present = 1; | |
635 | WRITE_GAL(kGal_DevBank2PReg, kGal_DevBank2Cfg); | |
636 | WRITE_GAL(kGal_DevBank3PReg, kGal_DevBank3Cfg); | |
637 | } | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static void __exit lcd_exit(void) | |
643 | { | |
644 | misc_deregister(&lcd_dev); | |
645 | } | |
646 | ||
647 | // | |
648 | // Function: dqpoll | |
649 | // | |
650 | // Description: Polls the data lines to see if the flash is busy | |
651 | // | |
652 | // In: address, byte data | |
653 | // | |
654 | // Out: 0 = busy, 1 = write or erase complete | |
655 | // | |
656 | // | |
657 | ||
658 | static int dqpoll(volatile unsigned long address, volatile unsigned char data) | |
659 | { | |
660 | volatile unsigned char dq7; | |
661 | ||
662 | dq7 = data & 0x80; | |
663 | ||
664 | return ((READ_FLASH(address) & 0x80) == dq7); | |
665 | } | |
666 | ||
667 | // | |
668 | // Function: timeout | |
669 | // | |
670 | // Description: Checks to see if erase or write has timed out | |
671 | // By polling dq5 | |
672 | // | |
673 | // In: address | |
674 | // | |
675 | // | |
676 | // Out: 0 = not timed out, 1 = timed out | |
677 | ||
678 | static int timeout(volatile unsigned long address) | |
679 | { | |
680 | return (READ_FLASH(address) & 0x20) == 0x20; | |
681 | } | |
682 | ||
683 | module_init(lcd_init); | |
684 | module_exit(lcd_exit); | |
685 | ||
686 | MODULE_AUTHOR("Andrew Bose"); | |
687 | MODULE_LICENSE("GPL"); |