summaryrefslogtreecommitdiff
path: root/packages/linux/openslug-kernel-2.6.11/nslu2-io.c
blob: cd5ed36c155edf66dcd30965b6e2526d1821d05f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
//=============================================================================
//
// n2-io.c version 0.1.7
// Author: Karen Spearel <kas11 at tampabay.rr.com>
// please report problems/bugs directly to the address above
//
// Boilerplate to be added "real soon now"...it is and has always been GPL'ed per
// MODULE_LICENSE but is offered without warrantee of any sort..use at your own risk
//
// NOTE: THIS IS INCOMPLETE.  INCLUDED ONLY TO KEEP FROM BREAKING THE BUILD,
// IT BEEPS AND SENDS A MESSAGE TO /proc/poweroff.  EVENTUALLY IT
// WILL TALK TO THE n2_pbd DAEMON.  EVENTUALLY THE LED DRIVER
// WILL TALK TO SOME USERLAND APP BUT ***NOT*** SET_LEDS.
// 
//=============================================================================
//	GPIO		Function	State
//	0		Red LED		Status		
//	1		Green LED	Ready = 1
//	2		Disk 2 LED	On = 0
//	3		Disk 1 LED	On = 0
//	4		Buzzer
//	5		Power Button	Pressed = 1
//	8		Power Down	Output = 1 powers down N2
//	12		Reset		Pressed = 0
//=============================================================================
// this driver is N2 specific and is purposely designed to do the minimum 
// necessary to provide the necessary services given the limited memory resources
// of the N2.  As OpenN2 develops, addition features will be added as
// suggested by the community.
//
//=============================================================================

#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>

#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/hardware.h>
#include <asm-arm/irq.h>
#include <asm-arm/delay.h>
#include <asm-arm/signal.h>


#define VERSION			"0.1.7"

#define N2RB_MAJOR		60
#define N2PB_MAJOR		61
#define	N2BZ_MAJOR		62
#define N2LM_MAJOR		126

#define N2PB_IRQ		22		//gpio5
#define	N2RB_IRQ		29		//gpio12

#define N2_BEEP_DUR_LONG	2000
#define N2_BEEP_DUR_MED		400
#define N2_BEEP_DUR_SHORT	100
#define N2_BEEP_PITCH_HIGH	250
#define N2_BEEP_PITCH_MED	500
#define N2_BEEP_PITCH_LOW	1000
#define N2_LONG_DELAY		30000

#define N2_BZ_GPIO		4
#define N2_PB_GPIO		5
#define N2_PO_GPIO		8		//power off
#define N2_RB_GPIO		12

#define GPIO_BZ_BM		0x0010	//b0000 0000 0001 0000
#define GPIO_PB_BM		0x0020	//b0000 0000 0010 0000
#define GPIO_PO_BM		0x0100  //b0000 0001 0000 0000
#define GPIO_RB_BM		0x1000	//b0001 0000 0000 0000

#define NOERR			0

#define RB_DELAY		50
#define PB_DELAY		20

#define PWR_OFF_STR		"poweroff"


// ioctls -- 'M" is used for sound cards...we don't got one so it seems safe

#define N2BZ_BEEP_STOP		_IO('M',0)       //stop multi-beep at end of audible
#define N2BZ_BEEP		_IO('M',1)       //one beep at current defaults
#define N2BZ_BEEPS		_IOW('M',3,long) //param beeps at current defaults
#define N2BZ_TONESET		_IOW('M',4,long) //set tone: range is high=250 to low=2000
#define N2BZ_ONTIME		_IOW('M',5,long) //ontime for multi-beeps in jiffies
#define	N2BZ_SILENTTIME		_IOW('M',6,long) //offtime for multi-beeps in jiffies
#define N2BZ_REPEATCNT		_IOW('M',7,long) //number of repeats for multi-beeps 0 = forever
#define N2BZ_COMBINED		_IOW('M',8,long) //combine all params in a long

#define N2LM_OFF		_IOW('M',32,long)
#define N2LM_ON			_IOW('M',33,long)
#define N2LM_BLINK		_IOW('M',34,long)
#define N2LM_ALT		_IOW('M',35,long)
#define N2LM_ALL_ON		_IO('M',36)
#define N2LM_ALL_OFF		_IO('M',37)

#define PHYS_LEDS		4
#define BLINK_DELAY		25

//  OR Masks to turn these LEDs ON

#define	RS_RED_ON	0x00000001	//0b0000 0000 0000 0010
#define	RS_GRN_ON	0x00000002	//0b0000 0000 0000 0001
#define RS_YEL_ON	0x00000003	//0b0000 0000 0000 0011

// AND Masks to turn these LEDs OFF

#define	RS_RED_OFF	0xfffffffe	//0b1111 1111 1111 1101
#define	RS_GRN_OFF	0xfffffffd	//0b1111 1111 1111 1110
#define RS_YEL_OFF	0xfffffffc	//0b1111 1111 1111 1100

// AND Masks to turn these LEDs ON

#define DISK1_ON	0xfffffff7	//0b1111 1111 1111 0111
#define	DISK2_ON	0xfffffffb	//0b1111 1111 1111 1011

// Or Masks to turn these LEDs OFF

#define DISK1_OFF	0x00000008	//0b0000 0000 0000 1000
#define	DISK2_OFF	0x00000004	//0b0000 0000 0000 0100	

// EOR masks for toggling LEDs on/off

#define RS_RG_ALT	0x00000003	//eor mask to toggle rs rg bits
#define RS_GRN_TGL	0x00000002
#define RS_RED_TGL	0x00000001
#define DISK1_TGL	0x00000008
#define DISK2_TGL	0x00000004

// The LED names for switches

#define LED_RS_RED	0
#define LED_RS_GRN	1
#define	LED_DISK1	2
#define LED_DISK2	3
#define LED_ALL		4

static unsigned long init_jiffy = 0;			//jiffies at init time
static unsigned long rb_presses = 0;			//number of reset button presses
static unsigned long ontime = 50;
static unsigned long offtime = 450;
static unsigned long bz_repeatcnt = 10;
static unsigned long tone = 1000;

DECLARE_WAIT_QUEUE_HEAD(n2rb_waitq);
DECLARE_WAIT_QUEUE_HEAD(n2pb_waitq);

static struct timer_list n2lm_rsg_timer;	//rs green 
static struct timer_list n2lm_rsr_timer;	//rs red
static struct timer_list n2lm_d1_timer;		//drive 1
static struct timer_list n2lm_d2_timer;		//drive 2
static struct timer_list n2rb_timer;
static struct timer_list n2pb_timer;
static struct timer_list n2bz_timer;		//beeper

//==================================================================================================
//
// Blinking is handled entirely by the 4 timer handlers.  On timeout, the bit in the
// GPIO output register is xor'd with a mask corresponding to the selected led which simply
// flips that bit.  No record of what any of the other leds is doing is needed.
//
//==================================================================================================
// this blinks rs green or green/yellow if rs red is on
static void n2lm_rsg_handler(unsigned long data)
{
	*IXP4XX_GPIO_GPOUTR ^= RS_GRN_TGL;			//flip the led
	n2lm_rsg_timer.expires = jiffies + BLINK_DELAY;		//next timeout
	add_timer(&n2lm_rsg_timer);				//reinit timer
	return;
}

// this blinks or alternates rs red green... inited wit green on/red off
static void n2lm_rsr_handler(unsigned long data)
{
	*IXP4XX_GPIO_GPOUTR ^= n2lm_rsr_timer.data;
	n2lm_rsr_timer.expires = jiffies + BLINK_DELAY;
	add_timer(&n2lm_rsr_timer);
	return;	
}
// blinks disk 1
static void n2lm_d1_handler(unsigned long data)
{
	*IXP4XX_GPIO_GPOUTR ^= DISK1_TGL;
	n2lm_d1_timer.expires = jiffies + BLINK_DELAY;
	add_timer(&n2lm_d1_timer);
	return;
}
// blinks disk 2
static void n2lm_d2_handler(unsigned long data)
{
	*IXP4XX_GPIO_GPOUTR ^= DISK2_TGL;
	n2lm_d2_timer.expires = jiffies + BLINK_DELAY;
	add_timer(&n2lm_d2_timer);
	return;
}

//==================================================================================================

static void n2lm_timer_start(unsigned long led)
{

	printk(KERN_DEBUG "timer: %ld\n",led);

	switch(led) {
		case LED_RS_RED:
			n2lm_rsr_timer.expires = jiffies + BLINK_DELAY;
			add_timer(&n2lm_rsr_timer);
			break;

		case LED_RS_GRN:
			n2lm_rsg_timer.expires = jiffies + BLINK_DELAY;
			add_timer(&n2lm_rsg_timer);
			break;

		case LED_DISK1:
			n2lm_d1_timer.expires = jiffies + BLINK_DELAY;
			add_timer(&n2lm_d1_timer);
 			break;

		case LED_DISK2:
			n2lm_d2_timer.expires = jiffies + BLINK_DELAY; 
			add_timer(&n2lm_d2_timer);
			break;

		default:
			break;
	}
	return;
}

//==================================================================================================

static void n2lm_timer_stop(unsigned long led)
{
	switch (led) {
		case LED_RS_RED:
			del_timer(&n2lm_rsr_timer);
			break;
		case LED_RS_GRN:
			del_timer(&n2lm_rsg_timer);
			break;
		case LED_DISK1:
			del_timer(&n2lm_d1_timer);
 			break;
		case LED_DISK2: 
			del_timer(&n2lm_d2_timer);
			break;
		default:
			break;
	}
	return;
}

//--------------------------------------------------------------------------------------------------

static void n2lm_timer_stop_all(void)
{
	del_timer(&n2lm_rsg_timer);
	del_timer(&n2lm_rsr_timer);
	del_timer(&n2lm_d1_timer); 
	del_timer(&n2lm_d2_timer);
	return;
}
//--------------------------------------------------------------------------------------------------

static void n2lm_ledon(unsigned long led)
{

	printk(KERN_DEBUG "ledon: %ld\n", led);

	switch (led) {
		case LED_RS_RED:	
			*IXP4XX_GPIO_GPOUTR |= RS_RED_ON;	//1
			return;
		case LED_RS_GRN:
			*IXP4XX_GPIO_GPOUTR |= RS_GRN_ON;	//2
			return;
		case LED_DISK1:
			*IXP4XX_GPIO_GPOUTR &= DISK1_ON;	//0xfffffffb
			return;
		case LED_DISK2:	
			*IXP4XX_GPIO_GPOUTR &= DISK2_ON;	//0xfffffff7
			return;
		case LED_ALL:					//all green
			*IXP4XX_GPIO_GPOUTR |= RS_GRN_ON;
			*IXP4XX_GPIO_GPOUTR &= (DISK1_ON & DISK2_ON);
			return;	
	}
}

//--------------------------------------------------------------------------------------------------

static void n2lm_ledoff(unsigned long led)
{

	switch (led) {
		case LED_RS_RED:	
			*IXP4XX_GPIO_GPOUTR &= RS_RED_OFF;	//0xffffffffe
			return;
		case LED_RS_GRN:
			*IXP4XX_GPIO_GPOUTR &= RS_GRN_OFF;	//0xfffffffd
			return;
		case LED_DISK1:
			*IXP4XX_GPIO_GPOUTR |= DISK1_OFF;	//0x00000004
			return;
		case LED_DISK2:	
			*IXP4XX_GPIO_GPOUTR |= DISK2_OFF;	//0x00000008
			return;
		case LED_ALL:
			*IXP4XX_GPIO_GPOUTR &= (RS_GRN_OFF & RS_RED_OFF);
			*IXP4XX_GPIO_GPOUTR |= (DISK1_OFF | DISK2_OFF);
	}
}

//==================================================================================================

static int n2lm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long led)
{

	printk(KERN_DEBUG "cmd=%d, led=%ld\n", cmd, led);
	
	if (led < 0 || led >= PHYS_LEDS)
		return -EINVAL;

	switch (cmd ) {
		case N2LM_ON:
			n2lm_timer_stop(led);
			n2lm_ledon(led);
			break;
			
		case N2LM_OFF:
			n2lm_timer_stop(led);
			n2lm_ledoff(led);
			break;
			
		case N2LM_BLINK:
			n2lm_ledon(led);
			if (led == LED_RS_RED)
				n2lm_rsr_timer.data = RS_RED_TGL;
			if (led == LED_RS_GRN)
				n2lm_rsr_timer.data = RS_GRN_TGL;
			n2lm_timer_start(led);
			break;

		case N2LM_ALT:
			if (led == LED_RS_RED)
			{
				n2lm_ledon(LED_RS_GRN);
				n2lm_ledoff(LED_RS_RED);
				n2lm_rsr_timer.data = RS_RG_ALT;
				n2lm_timer_start(LED_RS_RED);
				break;
			} else
				return -EINVAL;
		
		case N2LM_ALL_ON:
			n2lm_timer_stop_all();
			n2lm_ledon(LED_ALL);
			break;
		
		case N2LM_ALL_OFF:
			n2lm_timer_stop_all();
			n2lm_ledoff(LED_ALL);
			break;
		
		default:
			return -EINVAL;
	}

	return NOERR;
}

static struct file_operations n2lm_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= n2lm_ioctl,
};
//==================================================================================================
// We can't do anything fancy here since the system tick rate is far below that required to
// generate a desirable tone.  Therefore we haven't much choice but to use a busy loop until
// I get up to speed on the timers.  The saving grace is that for the normal uses, nothing 
// important should be haprepening. 
//==================================================================================================

static void n2_buzz(int tone_delay, int duration)
{
	int i;

	*IXP4XX_GPIO_GPOER &= ~GPIO_BZ_BM;
		
	for (i = 1; i < duration; i++) {
		*IXP4XX_GPIO_GPOUTR &= ~GPIO_BZ_BM;
		udelay(tone_delay);
		*IXP4XX_GPIO_GPOUTR |= GPIO_BZ_BM;
		udelay(tone_delay);
	}
	*IXP4XX_GPIO_GPOER |= GPIO_BZ_BM;

	return;
}
//=================================================================================================

// this handles the buzzer duty cycle
static void n2bz_handler(unsigned long data)
{
	if (--bz_repeatcnt > 0) {			//if just one beep left to do
		n2bz_timer.expires = jiffies + ontime + offtime;	//next timeout
		add_timer(&n2bz_timer);					//reinit timer
	}
	n2_buzz(tone/2, ontime);
	printk(KERN_DEBUG "Count = %d\tOntime = %d\n", bz_repeatcnt, ontime);
	return;
}

//==================================================================================================

static int n2bz_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long param)
{
	switch (cmd) {
		case N2BZ_BEEP:
			n2_buzz(tone/2, ontime);
			break;
	
		case N2BZ_BEEP_STOP:
			del_timer(&n2bz_timer);
			break;

		case N2BZ_BEEPS:
			if (param == 0)
				bz_repeatcnt = 0xffffffff;
			else
				bz_repeatcnt = param;
			n2bz_handler(0);
			break;
	
		case N2BZ_TONESET:
			if (param >= 250 && param <= 2000)
				tone = param;
			break;

		case N2BZ_ONTIME:
			if (param > 4 && param < 201)
				ontime = param;
			break;

		case N2BZ_SILENTTIME:
			if (param > ontime)			//enforce a reasonable duty cycle
				offtime = param;
			else
				offtime = ontime;
			break;

		case N2BZ_REPEATCNT:
			if (param == 0)
				bz_repeatcnt = 0xffffffff;
			else
				bz_repeatcnt = param;
			break;

		case N2BZ_COMBINED:
			bz_repeatcnt =  (param & 0xF0000000) >> 28;	//repeat 1 - 16
			ontime =        (param & 0x0FF00000) >> 20; 	//ontime 1 - 256 jiffies
			offtime =       (param & 0x000FFF00) >> 8;	//offtime 1 - 4095 jiffies
			tone =          (param & 0x000000FF) << 4;	//tone (1 - 255) * 16
			break;

		default:
			break;
	}
	return NOERR;
}

static struct file_operations n2bz_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= n2bz_ioctl,
};

//==================================================================================================
		
static irqreturn_t n2pb_handler (int irq, void *dev_id, struct pt_regs *regs)
{
	void *ret;
	
	wake_up(&n2pb_waitq);	
	remove_proc_entry(PWR_OFF_STR, NULL);		//no parent	
	n2_buzz(N2_BEEP_PITCH_MED, N2_BEEP_DUR_MED);
	ret = create_proc_entry(PWR_OFF_STR, 0, NULL);
	printk(KERN_DEBUG "cpe ret = %p\n", ret);

// WARNING: This is RUDE...it unconditionally pulls the power plug.
// Your data will be at risk...since this is just a test system
// I am leaving it enabled...eventually userland needs to get the
// message, do an orderly shutdown and use an ioctl or something in
// /proc/powerdowm to actually have us pull the plug.

	*IXP4XX_GPIO_GPOER &= ~GPIO_PO_BM;	// enable the pwr cntl gpio
	*IXP4XX_GPIO_GPOUTR |= GPIO_PO_BM;	// do the deed

	return IRQ_HANDLED;
}

//==================================================================================================
//
//static void do_rb_timeout(unsigned long data)
//{
//	int i;
//
//	for (i = 0; i < rb_presses; i++)
//		n2_buzz(N2_BEEP_PITCH_MED,N2_BEEP_DUR_SHORT);
//	return;
//}
//
//==================================================================================================
// does nothing -- waiting for userland to define
// This thing is sorta braindead...edge triggered IRQs aren't available in the drivers yet...so
// we hang in a loop until the button is no longer pressed

struct testr {
	int	ctl;
	long	param;
};

static irqreturn_t n2rb_handler (int irq, void *dev_id, struct pt_regs *regs)
{

	static struct testr test[] = {
				 N2LM_ALL_OFF,0,
				 N2LM_ON,0,
				 N2LM_OFF,0,
				 N2LM_ON,1,
				 N2LM_ALL_OFF,1, 
				 N2LM_ON,2,
				 N2LM_OFF,2,
				 N2LM_ON,3,
				 N2LM_OFF,3,
				 N2LM_BLINK,0,
				 N2LM_OFF,0,
				 N2LM_BLINK,1,
				 N2LM_OFF,1,
				 N2LM_BLINK,2,
				 N2LM_OFF,2,
				 N2LM_BLINK,3,
				 N2LM_OFF,3,
				 N2LM_ALL_OFF,0,
				 N2LM_ALT,1,
				 N2LM_OFF,1,
				 N2LM_ALL_ON,0
	};

	printk("Reset Entry IRQ =%d Presses = %d Jiffies = %08lx\tIO = %x\tIOW = %x\n", irq, rb_presses, jiffies, (int)_IO('M',rb_presses), (int)_IOW('M',rb_presses,long));

	wake_up(&n2rb_waitq);	
  	while ((*IXP4XX_GPIO_GPINR & GPIO_RB_BM) == 0)
		;					//wait for button release

	if (rb_presses > 20) 
		rb_presses = 0;
	tone = (rb_presses * 50) + 200;
	ontime = (rb_presses*10) + 100;
	offtime = 500 - (rb_presses*20);
	printk("Ontime = %d\tOfftime = %d\tTone = %d\n",ontime,offtime,tone);
 	rb_presses++;

	n2bz_ioctl(NULL,NULL, N2BZ_BEEPS, rb_presses);	
	n2lm_ioctl(NULL,NULL, test[rb_presses].ctl, test[rb_presses].param);
//	if (rb_presses == 0) {
//		init_jiffy = jiffies;
//		init_timer (&n2rb_timer);
//		n2rb_timer.function = do_rb_timeout;
//	};
//
//	if (rb_presses == 8)
//		rb_presses = 0;
//	if (rb_presses & 1)
//		n2lm_ledon(test[rb_presses]);
//	else
//		n2lm_ledoff(test[rb_presses]);
//	
//	n2rb_timer.expires = (jiffies + RB_DELAY);
//	add_timer (&n2rb_timer);
//	if (rb_presses < 5) {
//		if (rb_presses > 0)
//			n2lm_ledoff(rb_presses);
//		n2lm_ledon(++rb_presses);
//		n2lm_timer_start(rb_presses);
//	};

	printk(KERN_DEBUG "Reset Exit IRQ=%d Presses= %d Jiffies= %08lx\n", irq, rb_presses, jiffies);
	return IRQ_HANDLED;

}

//==================================================================================================
//  What to do here is majorly undetermined...

static int n2rb_read (struct file *filp, char __user *buffer, size_t count, loff_t *ppos)
{
	printk(KERN_DEBUG "Reset Button Wait\n");
	interruptible_sleep_on(&n2rb_waitq);
	return copy_to_user(buffer, "reset", 5) ? -EFAULT : 5;

}

//==================================================================================================
//  What to do here is majorly undetermined...

static int n2pb_read (struct file *filp, char __user *buffer, size_t count, loff_t *ppos)
{
	printk(KERN_DEBUG "Power Button Wait\n");
	interruptible_sleep_on(&n2pb_waitq);
	return copy_to_user(buffer, "poweroff", 8) ? -EFAULT : 8;

}

//--------------------------------------------------------------------------------------------------

static struct file_operations n2rb_fops = {
	.owner		= THIS_MODULE,
	.read		= n2rb_read,
};

//--------------------------------------------------------------------------------------------------

static struct file_operations n2pb_fops = {
	.owner		= THIS_MODULE,
	.read		= n2pb_read,
};

//==================================================================================================

static void n2iom_initarch(void)
{
	printk(KERN_DEBUG "setup_interrupts - jiffies=%ld init_jiffy=%ld\n", jiffies, init_jiffy);

	*IXP4XX_GPIO_GPISR = 0x20400000;	// read the 2 irqs to clr
	gpio_line_config(N2_RB_GPIO, IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
	gpio_line_isr_clear(N2_RB_GPIO);
	gpio_line_config(N2_PB_GPIO, IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_HIGH);
	gpio_line_isr_clear(N2_PB_GPIO);

	init_timer(&n2lm_rsg_timer);
	init_timer(&n2lm_rsr_timer);
	init_timer(&n2lm_d1_timer);
	init_timer(&n2lm_d2_timer);
//	init_timer(&n2rb_timer);
//	init_timer(&n2pb_timer);
	init_timer(&n2bz_timer);
	n2lm_rsr_timer.function = n2lm_rsr_handler;
	n2lm_rsg_timer.function = n2lm_rsg_handler;
	n2lm_d2_timer.function = n2lm_d2_handler;
	n2lm_d1_timer.function = n2lm_d1_handler;
	n2bz_timer.function = n2bz_handler;
	n2lm_rsr_timer.data = n2lm_rsg_timer.data = n2lm_d1_timer.data = n2lm_d2_timer.data = n2bz_timer.data = 0;

	*IXP4XX_GPIO_GPOER &= 0xfffffff0;	//enable gpio 0-3
	*IXP4XX_GPIO_GPOUTR |= 0x00000003;	//turn off the leds
	*IXP4XX_GPIO_GPOUTR &= 0xfffffffc;
	n2lm_ledon(LED_ALL);
	n2_buzz(N2_BEEP_PITCH_MED, N2_BEEP_DUR_SHORT);
	n2lm_ledoff(LED_ALL);
// Default the Ready/Status to Red during kernel boot, Turn Green at the end of sysvinit
	n2lm_ledon(LED_RS_RED);

	return;
}

//==================================================================================================

static int __init n2iom_init(void)
{
	printk(KERN_INFO "OpenN2 Misc I/O Driver Version %s\n", VERSION);
  	
	init_jiffy = jiffies;
	printk(KERN_DEBUG "init_jiffy=%ld\n",init_jiffy);
	n2iom_initarch();

	if (register_chrdev(N2RB_MAJOR, "n2_rbm", &n2pb_fops) < NOERR) {
		printk(KERN_DEBUG "Reset Button Major %d not available\n", N2RB_MAJOR);
		return -EBUSY;
	}
	if (register_chrdev(N2PB_MAJOR, "n2_pbm", &n2rb_fops) < NOERR) {
		printk(KERN_DEBUG "Power Button Major %d not available\n", N2PB_MAJOR);
		return -EBUSY;
	}
	if (register_chrdev(N2LM_MAJOR, "n2_ledm", &n2lm_fops) < NOERR) {
		printk(KERN_DEBUG "Led Manager Major %d not available\n", N2LM_MAJOR);
		return -EBUSY;
	}
	if (register_chrdev(N2BZ_MAJOR, "n2_bzm", &n2bz_fops) < NOERR) {
		printk(KERN_DEBUG "Buzzer Major %d not available\n", N2BZ_MAJOR);
		return -EBUSY;
	}

	if (request_irq(N2RB_IRQ, &n2rb_handler, SA_INTERRUPT, "n2_rb", NULL) < NOERR) {
		printk(KERN_DEBUG "Reset Button IRQ %d not available\n", N2RB_IRQ);
		return -EIO;
	}
	if (request_irq(N2PB_IRQ, &n2pb_handler, SA_INTERRUPT, "n2_pb", NULL) < NOERR) {
		printk(KERN_DEBUG "Power Button IRQ %d not available\n", N2PB_IRQ);
		return -EIO;	
	}
	
	enable_irq(N2PB_IRQ);
	enable_irq(N2RB_IRQ);
	return (NOERR);
}

//==================================================================================================

static void __exit n2iom_exit(void)
{
	remove_proc_entry(PWR_OFF_STR, NULL);
	del_timer(&n2rb_timer);
	free_irq(N2RB_IRQ,NULL);
	unregister_chrdev(N2PB_MAJOR, "n2pb");
	del_timer(&n2pb_timer);	
	free_irq(N2PB_IRQ, NULL);
	unregister_chrdev(N2RB_MAJOR, "n2rb" );
	del_timer(&n2lm_rsg_timer);
	del_timer(&n2lm_rsr_timer);
	del_timer(&n2lm_d1_timer);
	del_timer(&n2lm_d2_timer);	
	unregister_chrdev(N2LM_MAJOR, "n2lm" );
}

module_init (n2iom_init);
module_exit (n2iom_exit);

MODULE_AUTHOR("Karen Spearel <kas11@tampabay.rr.com>");
MODULE_DESCRIPTION("OpenN2 Buttons/LEDs IO Driver");
MODULE_LICENSE("GPL");
static int debug = 7;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debugging enabled = 8");