summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-footbridge/netwinder-hw.c
blob: 5f7265b1b34c77040c45882fac1c06ab2f4c76ff (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
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
// SPDX-License-Identifier: GPL-2.0
/*
 * linux/arch/arm/mach-footbridge/netwinder-hw.c
 *
 * Netwinder machine fixup
 *
 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
 */
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/leds.h>

#include <asm/hardware/dec21285.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/system_misc.h>

#include <asm/mach/arch.h>

#include "common.h"

#define IRDA_IO_BASE		0x180
#define GP1_IO_BASE		0x338
#define GP2_IO_BASE		0x33a

/*
 * Winbond WB83977F accessibility stuff
 */
static inline void wb977_open(void)
{
	outb(0x87, 0x370);
	outb(0x87, 0x370);
}

static inline void wb977_close(void)
{
	outb(0xaa, 0x370);
}

static inline void wb977_wb(int reg, int val)
{
	outb(reg, 0x370);
	outb(val, 0x371);
}

static inline void wb977_ww(int reg, int val)
{
	outb(reg, 0x370);
	outb(val >> 8, 0x371);
	outb(reg + 1, 0x370);
	outb(val & 255, 0x371);
}

#define wb977_device_select(dev)	wb977_wb(0x07, dev)
#define wb977_device_disable()		wb977_wb(0x30, 0x00)
#define wb977_device_enable()		wb977_wb(0x30, 0x01)

/*
 * This is a lock for accessing ports GP1_IO_BASE and GP2_IO_BASE
 */
DEFINE_RAW_SPINLOCK(nw_gpio_lock);
EXPORT_SYMBOL(nw_gpio_lock);

static unsigned int current_gpio_op;
static unsigned int current_gpio_io;
static unsigned int current_cpld;

void nw_gpio_modify_op(unsigned int mask, unsigned int set)
{
	unsigned int new_gpio, changed;

	new_gpio = (current_gpio_op & ~mask) | set;
	changed = new_gpio ^ current_gpio_op;
	current_gpio_op = new_gpio;

	if (changed & 0xff)
		outb(new_gpio, GP1_IO_BASE);
	if (changed & 0xff00)
		outb(new_gpio >> 8, GP2_IO_BASE);
}
EXPORT_SYMBOL(nw_gpio_modify_op);

static inline void __gpio_modify_io(int mask, int in)
{
	unsigned int new_gpio, changed;
	int port;

	new_gpio = (current_gpio_io & ~mask) | in;
	changed = new_gpio ^ current_gpio_io;
	current_gpio_io = new_gpio;

	changed >>= 1;
	new_gpio >>= 1;

	wb977_device_select(7);

	for (port = 0xe1; changed && port < 0xe8; changed >>= 1) {
		wb977_wb(port, new_gpio & 1);

		port += 1;
		new_gpio >>= 1;
	}

	wb977_device_select(8);

	for (port = 0xe8; changed && port < 0xec; changed >>= 1) {
		wb977_wb(port, new_gpio & 1);

		port += 1;
		new_gpio >>= 1;
	}
}

void nw_gpio_modify_io(unsigned int mask, unsigned int in)
{
	/* Open up the SuperIO chip */
	wb977_open();

	__gpio_modify_io(mask, in);

	/* Close up the EFER gate */
	wb977_close();
}
EXPORT_SYMBOL(nw_gpio_modify_io);

unsigned int nw_gpio_read(void)
{
	return inb(GP1_IO_BASE) | inb(GP2_IO_BASE) << 8;
}
EXPORT_SYMBOL(nw_gpio_read);

/*
 * Initialise the Winbond W83977F global registers
 */
static inline void wb977_init_global(void)
{
	/*
	 * Enable R/W config registers
	 */
	wb977_wb(0x26, 0x40);

	/*
	 * Power down FDC (not used)
	 */
	wb977_wb(0x22, 0xfe);

	/*
	 * GP12, GP11, CIRRX, IRRXH, GP10
	 */
	wb977_wb(0x2a, 0xc1);

	/*
	 * GP23, GP22, GP21, GP20, GP13
	 */
	wb977_wb(0x2b, 0x6b);

	/*
	 * GP17, GP16, GP15, GP14
	 */
	wb977_wb(0x2c, 0x55);
}

/*
 * Initialise the Winbond W83977F printer port
 */
static inline void wb977_init_printer(void)
{
	wb977_device_select(1);

	/*
	 * mode 1 == EPP
	 */
	wb977_wb(0xf0, 0x01);
}

/*
 * Initialise the Winbond W83977F keyboard controller
 */
static inline void wb977_init_keyboard(void)
{
	wb977_device_select(5);

	/*
	 * Keyboard controller address
	 */
	wb977_ww(0x60, 0x0060);
	wb977_ww(0x62, 0x0064);

	/*
	 * Keyboard IRQ 1, active high, edge trigger
	 */
	wb977_wb(0x70, 1);
	wb977_wb(0x71, 0x02);

	/*
	 * Mouse IRQ 5, active high, edge trigger
	 */
	wb977_wb(0x72, 5);
	wb977_wb(0x73, 0x02);

	/*
	 * KBC 8MHz
	 */
	wb977_wb(0xf0, 0x40);

	/*
	 * Enable device
	 */
	wb977_device_enable();
}

/*
 * Initialise the Winbond W83977F Infra-Red device
 */
static inline void wb977_init_irda(void)
{
	wb977_device_select(6);

	/*
	 * IR base address
	 */
	wb977_ww(0x60, IRDA_IO_BASE);

	/*
	 * IRDA IRQ 6, active high, edge trigger
	 */
	wb977_wb(0x70, 6);
	wb977_wb(0x71, 0x02);

	/*
	 * RX DMA - ISA DMA 0
	 */
	wb977_wb(0x74, 0x00);

	/*
	 * TX DMA - Disable Tx DMA
	 */
	wb977_wb(0x75, 0x04);

	/*
	 * Append CRC, Enable bank selection
	 */
	wb977_wb(0xf0, 0x03);

	/*
	 * Enable device
	 */
	wb977_device_enable();
}

/*
 * Initialise Winbond W83977F general purpose IO
 */
static inline void wb977_init_gpio(void)
{
	unsigned long flags;

	/*
	 * Set up initial I/O definitions
	 */
	current_gpio_io = -1;
	__gpio_modify_io(-1, GPIO_DONE | GPIO_WDTIMER);

	wb977_device_select(7);

	/*
	 * Group1 base address
	 */
	wb977_ww(0x60, GP1_IO_BASE);
	wb977_ww(0x62, 0);
	wb977_ww(0x64, 0);

	/*
	 * GP10 (Orage button) IRQ 10, active high, edge trigger
	 */
	wb977_wb(0x70, 10);
	wb977_wb(0x71, 0x02);

	/*
	 * GP10: Debounce filter enabled, IRQ, input
	 */
	wb977_wb(0xe0, 0x19);

	/*
	 * Enable Group1
	 */
	wb977_device_enable();

	wb977_device_select(8);

	/*
	 * Group2 base address
	 */
	wb977_ww(0x60, GP2_IO_BASE);

	/*
	 * Clear watchdog timer regs
	 *  - timer disable
	 */
	wb977_wb(0xf2, 0x00);

	/*
	 *  - disable LED, no mouse nor keyboard IRQ
	 */
	wb977_wb(0xf3, 0x00);

	/*
	 *  - timer counting, disable power LED, disable timeouot
	 */
	wb977_wb(0xf4, 0x00);

	/*
	 * Enable group2
	 */
	wb977_device_enable();

	/*
	 * Set Group1/Group2 outputs
	 */
	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
	nw_gpio_modify_op(-1, GPIO_RED_LED | GPIO_FAN);
	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
}

/*
 * Initialise the Winbond W83977F chip.
 */
static void __init wb977_init(void)
{
	request_region(0x370, 2, "W83977AF configuration");

	/*
	 * Open up the SuperIO chip
	 */
	wb977_open();

	/*
	 * Initialise the global registers
	 */
	wb977_init_global();

	/*
	 * Initialise the various devices in
	 * the multi-IO chip.
	 */
	wb977_init_printer();
	wb977_init_keyboard();
	wb977_init_irda();
	wb977_init_gpio();

	/*
	 * Close up the EFER gate
	 */
	wb977_close();
}

void nw_cpld_modify(unsigned int mask, unsigned int set)
{
	int msk;

	current_cpld = (current_cpld & ~mask) | set;

	nw_gpio_modify_io(GPIO_DATA | GPIO_IOCLK | GPIO_IOLOAD, 0);
	nw_gpio_modify_op(GPIO_IOLOAD, 0);

	for (msk = 8; msk; msk >>= 1) {
		int bit = current_cpld & msk;

		nw_gpio_modify_op(GPIO_DATA | GPIO_IOCLK, bit ? GPIO_DATA : 0);
		nw_gpio_modify_op(GPIO_IOCLK, GPIO_IOCLK);
	}

	nw_gpio_modify_op(GPIO_IOCLK|GPIO_DATA, 0);
	nw_gpio_modify_op(GPIO_IOLOAD|GPIO_DSCLK, GPIO_IOLOAD|GPIO_DSCLK);
	nw_gpio_modify_op(GPIO_IOLOAD, 0);
}
EXPORT_SYMBOL(nw_cpld_modify);

static void __init cpld_init(void)
{
	unsigned long flags;

	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
	nw_cpld_modify(-1, CPLD_UNMUTE | CPLD_7111_DISABLE);
	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
}

static unsigned char rwa_unlock[] __initdata =
{ 0x00, 0x00, 0x6a, 0xb5, 0xda, 0xed, 0xf6, 0xfb, 0x7d, 0xbe, 0xdf, 0x6f, 0x37, 0x1b,
  0x0d, 0x86, 0xc3, 0x61, 0xb0, 0x58, 0x2c, 0x16, 0x8b, 0x45, 0xa2, 0xd1, 0xe8, 0x74,
  0x3a, 0x9d, 0xce, 0xe7, 0x73, 0x39 };

#ifndef DEBUG
#define dprintk(x...)
#else
#define dprintk(x...) printk(x)
#endif

#define WRITE_RWA(r,v) do { outb((r), 0x279); udelay(10); outb((v), 0xa79); } while (0)

static inline void rwa010_unlock(void)
{
	int i;

	WRITE_RWA(2, 2);
	mdelay(10);

	for (i = 0; i < sizeof(rwa_unlock); i++) {
		outb(rwa_unlock[i], 0x279);
		udelay(10);
	}
}

static inline void rwa010_read_ident(void)
{
	unsigned char si[9];
	int i, j;

	WRITE_RWA(3, 0);
	WRITE_RWA(0, 128);

	outb(1, 0x279);

	mdelay(1);

	dprintk("Identifier: ");
	for (i = 0; i < 9; i++) {
		si[i] = 0;
		for (j = 0; j < 8; j++) {
			int bit;
			udelay(250);
			inb(0x203);
			udelay(250);
			bit = inb(0x203);
			dprintk("%02X ", bit);
			bit = (bit == 0xaa) ? 1 : 0;
			si[i] |= bit << j;
		}
		dprintk("(%02X) ", si[i]);
	}
	dprintk("\n");
}

static inline void rwa010_global_init(void)
{
	WRITE_RWA(6, 2);	// Assign a card no = 2

	dprintk("Card no = %d\n", inb(0x203));

	/* disable the modem section of the chip */
	WRITE_RWA(7, 3);
	WRITE_RWA(0x30, 0);

	/* disable the cdrom section of the chip */
	WRITE_RWA(7, 4);
	WRITE_RWA(0x30, 0);

	/* disable the MPU-401 section of the chip */
	WRITE_RWA(7, 2);
	WRITE_RWA(0x30, 0);
}

static inline void rwa010_game_port_init(void)
{
	int i;

	WRITE_RWA(7, 5);

	dprintk("Slider base: ");
	WRITE_RWA(0x61, 1);
	i = inb(0x203);

	WRITE_RWA(0x60, 2);
	dprintk("%02X%02X (201)\n", inb(0x203), i);

	WRITE_RWA(0x30, 1);
}

static inline void rwa010_waveartist_init(int base, int irq, int dma)
{
	int i;

	WRITE_RWA(7, 0);

	dprintk("WaveArtist base: ");
	WRITE_RWA(0x61, base & 255);
	i = inb(0x203);

	WRITE_RWA(0x60, base >> 8);
	dprintk("%02X%02X (%X),", inb(0x203), i, base);

	WRITE_RWA(0x70, irq);
	dprintk(" irq: %d (%d),", inb(0x203), irq);

	WRITE_RWA(0x74, dma);
	dprintk(" dma: %d (%d)\n", inb(0x203), dma);

	WRITE_RWA(0x30, 1);
}

static inline void rwa010_soundblaster_init(int sb_base, int al_base, int irq, int dma)
{
	int i;

	WRITE_RWA(7, 1);

	dprintk("SoundBlaster base: ");
	WRITE_RWA(0x61, sb_base & 255);
	i = inb(0x203);

	WRITE_RWA(0x60, sb_base >> 8);
	dprintk("%02X%02X (%X),", inb(0x203), i, sb_base);

	dprintk(" irq: ");
	WRITE_RWA(0x70, irq);
	dprintk("%d (%d),", inb(0x203), irq);

	dprintk(" 8-bit DMA: ");
	WRITE_RWA(0x74, dma);
	dprintk("%d (%d)\n", inb(0x203), dma);

	dprintk("AdLib base: ");
	WRITE_RWA(0x63, al_base & 255);
	i = inb(0x203);

	WRITE_RWA(0x62, al_base >> 8);
	dprintk("%02X%02X (%X)\n", inb(0x203), i, al_base);

	WRITE_RWA(0x30, 1);
}

static void rwa010_soundblaster_reset(void)
{
	int i;

	outb(1, 0x226);
	udelay(3);
	outb(0, 0x226);

	for (i = 0; i < 5; i++) {
		if (inb(0x22e) & 0x80)
			break;
		mdelay(1);
	}
	if (i == 5)
		printk("SoundBlaster: DSP reset failed\n");

	dprintk("SoundBlaster DSP reset: %02X (AA)\n", inb(0x22a));

	for (i = 0; i < 5; i++) {
		if ((inb(0x22c) & 0x80) == 0)
			break;
		mdelay(1);
	}

	if (i == 5)
		printk("SoundBlaster: DSP not ready\n");
	else {
		outb(0xe1, 0x22c);

		dprintk("SoundBlaster DSP id: ");
		i = inb(0x22a);
		udelay(1);
		i |= inb(0x22a) << 8;
		dprintk("%04X\n", i);

		for (i = 0; i < 5; i++) {
			if ((inb(0x22c) & 0x80) == 0)
				break;
			mdelay(1);
		}

		if (i == 5)
			printk("SoundBlaster: could not turn speaker off\n");

		outb(0xd3, 0x22c);
	}

	/* turn on OPL3 */
	outb(5, 0x38a);
	outb(1, 0x38b);
}

static void __init rwa010_init(void)
{
	rwa010_unlock();
	rwa010_read_ident();
	rwa010_global_init();
	rwa010_game_port_init();
	rwa010_waveartist_init(0x250, 3, 7);
	rwa010_soundblaster_init(0x220, 0x388, 3, 1);
	rwa010_soundblaster_reset();
}

/*
 * Initialise any other hardware after we've got the PCI bus
 * initialised.  We may need the PCI bus to talk to this other
 * hardware.
 */
static int __init nw_hw_init(void)
{
	if (machine_is_netwinder()) {
		wb977_init();
		cpld_init();
		rwa010_init();
	}
	return 0;
}

__initcall(nw_hw_init);

/*
 * Older NeTTroms either do not provide a parameters
 * page, or they don't supply correct information in
 * the parameter page.
 */
static void __init
fixup_netwinder(struct tag *tags, char **cmdline)
{
#ifdef CONFIG_ISAPNP
	extern int isapnp_disable;

	/*
	 * We must not use the kernels ISAPnP code
	 * on the NetWinder - it will reset the settings
	 * for the WaveArtist chip and render it inoperable.
	 */
	isapnp_disable = 1;
#endif
}

static void netwinder_restart(enum reboot_mode mode, const char *cmd)
{
	if (mode == REBOOT_SOFT) {
		/* Jump into the ROM */
		soft_restart(0x41000000);
	} else {
		local_irq_disable();
		local_fiq_disable();

		/* open up the SuperIO chip */
		outb(0x87, 0x370);
		outb(0x87, 0x370);

		/* aux function group 1 (logical device 7) */
		outb(0x07, 0x370);
		outb(0x07, 0x371);

		/* set GP16 for WD-TIMER output */
		outb(0xe6, 0x370);
		outb(0x00, 0x371);

		/* set a RED LED and toggle WD_TIMER for rebooting */
		outb(0xc4, 0x338);
	}
}

/* LEDs */
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
struct netwinder_led {
	struct led_classdev     cdev;
	u8                      mask;
};

/*
 * The triggers lines up below will only be used if the
 * LED triggers are compiled in.
 */
static const struct {
	const char *name;
	const char *trigger;
} netwinder_leds[] = {
	{ "netwinder:green", "heartbeat", },
	{ "netwinder:red", "cpu0", },
};

/*
 * The LED control in Netwinder is reversed:
 *  - setting bit means turn off LED
 *  - clearing bit means turn on LED
 */
static void netwinder_led_set(struct led_classdev *cdev,
		enum led_brightness b)
{
	struct netwinder_led *led = container_of(cdev,
			struct netwinder_led, cdev);
	unsigned long flags;
	u32 reg;

	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
	reg = nw_gpio_read();
	if (b != LED_OFF)
		reg &= ~led->mask;
	else
		reg |= led->mask;
	nw_gpio_modify_op(led->mask, reg);
	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
}

static enum led_brightness netwinder_led_get(struct led_classdev *cdev)
{
	struct netwinder_led *led = container_of(cdev,
			struct netwinder_led, cdev);
	unsigned long flags;
	u32 reg;

	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
	reg = nw_gpio_read();
	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);

	return (reg & led->mask) ? LED_OFF : LED_FULL;
}

static int __init netwinder_leds_init(void)
{
	int i;

	if (!machine_is_netwinder())
		return -ENODEV;

	for (i = 0; i < ARRAY_SIZE(netwinder_leds); i++) {
		struct netwinder_led *led;

		led = kzalloc(sizeof(*led), GFP_KERNEL);
		if (!led)
			break;

		led->cdev.name = netwinder_leds[i].name;
		led->cdev.brightness_set = netwinder_led_set;
		led->cdev.brightness_get = netwinder_led_get;
		led->cdev.default_trigger = netwinder_leds[i].trigger;

		if (i == 0)
			led->mask = GPIO_GREEN_LED;
		else
			led->mask = GPIO_RED_LED;

		if (led_classdev_register(NULL, &led->cdev) < 0) {
			kfree(led);
			break;
		}
	}

	return 0;
}

/*
 * Since we may have triggers on any subsystem, defer registration
 * until after subsystem_init.
 */
fs_initcall(netwinder_leds_init);
#endif

MACHINE_START(NETWINDER, "Rebel-NetWinder")
	/* Maintainer: Russell King/Rebel.com */
	.atag_offset	= 0x100,
	.video_start	= 0x000a0000,
	.video_end	= 0x000bffff,
	.reserve_lp0	= 1,
	.reserve_lp2	= 1,
	.fixup		= fixup_netwinder,
	.map_io		= footbridge_map_io,
	.init_irq	= footbridge_init_irq,
	.init_time	= isa_timer_init,
	.restart	= netwinder_restart,
MACHINE_END