summaryrefslogtreecommitdiffstats
path: root/kernel/arch/arm/mach-sa1100/assabet.c
blob: d28ecb9ef172af7b67b8fdd8a19ef5fcee3a265c (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
/*
 * linux/arch/arm/mach-sa1100/assabet.c
 *
 * Author: Nicolas Pitre
 *
 * This file contains all Assabet-specific tweaks.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/mfd/ucb1x00.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/leds.h>
#include <linux/slab.h>

#include <video/sa1100fb.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>

#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <linux/platform_data/irda-sa11x0.h>
#include <asm/mach/map.h>
#include <mach/assabet.h>
#include <linux/platform_data/mfd-mcp-sa11x0.h>
#include <mach/irqs.h>

#include "generic.h"

#define ASSABET_BCR_DB1110 \
	(ASSABET_BCR_SPK_OFF    | \
	 ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
	 ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
	 ASSABET_BCR_IRDA_MD0)

#define ASSABET_BCR_DB1111 \
	(ASSABET_BCR_SPK_OFF    | \
	 ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
	 ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
	 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
	 ASSABET_BCR_IRDA_MD0   | ASSABET_BCR_CF_RST)

unsigned long SCR_value = ASSABET_SCR_INIT;
EXPORT_SYMBOL(SCR_value);

static unsigned long BCR_value = ASSABET_BCR_DB1110;

void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
{
	unsigned long flags;

	local_irq_save(flags);
	BCR_value = (BCR_value & ~mask) | val;
	ASSABET_BCR = BCR_value;
	local_irq_restore(flags);
}

EXPORT_SYMBOL(ASSABET_BCR_frob);

/*
 * The codec reset goes to three devices, so we need to release
 * the rest when any one of these requests it.  However, that
 * causes the ADV7171 to consume around 100mA - more than half
 * the LCD-blanked power.
 *
 * With the ADV7171, LCD and backlight enabled, we go over
 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
 * is connected, the Assabet crashes.
 */
#define RST_UCB1X00 (1 << 0)
#define RST_UDA1341 (1 << 1)
#define RST_ADV7171 (1 << 2)

#define SDA GPIO_GPIO(15)
#define SCK GPIO_GPIO(18)
#define MOD GPIO_GPIO(17)

static void adv7171_start(void)
{
	GPSR = SCK;
	udelay(1);
	GPSR = SDA;
	udelay(2);
	GPCR = SDA;
}

static void adv7171_stop(void)
{
	GPSR = SCK;
	udelay(2);
	GPSR = SDA;
	udelay(1);
}

static void adv7171_send(unsigned byte)
{
	unsigned i;

	for (i = 0; i < 8; i++, byte <<= 1) {
		GPCR = SCK;
		udelay(1);
		if (byte & 0x80)
			GPSR = SDA;
		else
			GPCR = SDA;
		udelay(1);
		GPSR = SCK;
		udelay(1);
	}
	GPCR = SCK;
	udelay(1);
	GPSR = SDA;
	udelay(1);
	GPDR &= ~SDA;
	GPSR = SCK;
	udelay(1);
	if (GPLR & SDA)
		printk(KERN_WARNING "No ACK from ADV7171\n");
	udelay(1);
	GPCR = SCK | SDA;
	udelay(1);
	GPDR |= SDA;
	udelay(1);
}

static void adv7171_write(unsigned reg, unsigned val)
{
	unsigned gpdr = GPDR;
	unsigned gplr = GPLR;

	ASSABET_BCR = BCR_value | ASSABET_BCR_AUDIO_ON;
	udelay(100);

	GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
	GPDR = (GPDR | SCK | MOD) & ~SDA;
	udelay(10);
	if (!(GPLR & SDA))
		printk(KERN_WARNING "Something dragging SDA down?\n");
	GPDR |= SDA;

	adv7171_start();
	adv7171_send(0x54);
	adv7171_send(reg);
	adv7171_send(val);
	adv7171_stop();

	/* Restore GPIO state for L3 bus */
	GPSR = gplr & (SDA | SCK | MOD);
	GPCR = (~gplr) & (SDA | SCK | MOD);
	GPDR = gpdr;
}

static void adv7171_sleep(void)
{
	/* Put the ADV7171 into sleep mode */
	adv7171_write(0x04, 0x40);
}

static unsigned codec_nreset;

static void assabet_codec_reset(unsigned mask, int set)
{
	unsigned long flags;
	bool old;

	local_irq_save(flags);
	old = !codec_nreset;
	if (set)
		codec_nreset &= ~mask;
	else
		codec_nreset |= mask;

	if (old != !codec_nreset) {
		if (codec_nreset) {
			ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
			adv7171_sleep();
		} else {
			ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
		}
	}
	local_irq_restore(flags);
}

static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
{
	int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
		state == UCB_RST_PROBE_FAIL;
	assabet_codec_reset(RST_UCB1X00, set);
}

void assabet_uda1341_reset(int set)
{
	assabet_codec_reset(RST_UDA1341, set);
}
EXPORT_SYMBOL(assabet_uda1341_reset);


/*
 * Assabet flash support code.
 */

#ifdef ASSABET_REV_4
/*
 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
 */
static struct mtd_partition assabet_partitions[] = {
	{
		.name		= "bootloader",
		.size		= 0x00020000,
		.offset		= 0,
		.mask_flags	= MTD_WRITEABLE,
	}, {
		.name		= "bootloader params",
		.size		= 0x00020000,
		.offset		= MTDPART_OFS_APPEND,
		.mask_flags	= MTD_WRITEABLE,
	}, {
		.name		= "jffs",
		.size		= MTDPART_SIZ_FULL,
		.offset		= MTDPART_OFS_APPEND,
	}
};
#else
/*
 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
 */
static struct mtd_partition assabet_partitions[] = {
	{
		.name		= "bootloader",
		.size		= 0x00040000,
		.offset		= 0,
		.mask_flags	= MTD_WRITEABLE,
	}, {
		.name		= "bootloader params",
		.size		= 0x00040000,
		.offset		= MTDPART_OFS_APPEND,
		.mask_flags	= MTD_WRITEABLE,
	}, {
		.name		= "jffs",
		.size		= MTDPART_SIZ_FULL,
		.offset		= MTDPART_OFS_APPEND,
	}
};
#endif

static struct flash_platform_data assabet_flash_data = {
	.map_name	= "cfi_probe",
	.parts		= assabet_partitions,
	.nr_parts	= ARRAY_SIZE(assabet_partitions),
};

static struct resource assabet_flash_resources[] = {
	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
	DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
};


/*
 * Assabet IrDA support code.
 */

static int assabet_irda_set_power(struct device *dev, unsigned int state)
{
	static unsigned int bcr_state[4] = {
		ASSABET_BCR_IRDA_MD0,
		ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
		ASSABET_BCR_IRDA_MD1,
		0
	};

	if (state < 4)
		ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
				 bcr_state[state]);
	return 0;
}

static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
{
	if (speed < 4000000)
		ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
	else
		ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
}

static struct irda_platform_data assabet_irda_data = {
	.set_power	= assabet_irda_set_power,
	.set_speed	= assabet_irda_set_speed,
};

static struct ucb1x00_plat_data assabet_ucb1x00_data = {
	.reset		= assabet_ucb1x00_reset,
	.gpio_base	= -1,
	.can_wakeup	= 1,
};

static struct mcp_plat_data assabet_mcp_data = {
	.mccr0		= MCCR0_ADM,
	.sclk_rate	= 11981000,
	.codec_pdata	= &assabet_ucb1x00_data,
};

static void assabet_lcd_set_visual(u32 visual)
{
	u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;

	if (machine_is_assabet()) {
#if 1		// phase 4 or newer Assabet's
		if (is_true_color)
			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
		else
			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
#else
		// older Assabet's
		if (is_true_color)
			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
		else
			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
#endif
	}
}

#ifndef ASSABET_PAL_VIDEO
static void assabet_lcd_backlight_power(int on)
{
	if (on)
		ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
	else
		ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
}

/*
 * Turn on/off the backlight.  When turning the backlight on, we wait
 * 500us after turning it on so we don't cause the supplies to droop
 * when we enable the LCD controller (and cause a hard reset.)
 */
static void assabet_lcd_power(int on)
{
	if (on) {
		ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
		udelay(500);
	} else
		ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
}

/*
 * The assabet uses a sharp LQ039Q2DS54 LCD module.  It is actually
 * takes an RGB666 signal, but we provide it with an RGB565 signal
 * instead (def_rgb_16).
 */
static struct sa1100fb_mach_info lq039q2ds54_info = {
	.pixclock	= 171521,	.bpp		= 16,
	.xres		= 320,		.yres		= 240,

	.hsync_len	= 5,		.vsync_len	= 1,
	.left_margin	= 61,		.upper_margin	= 3,
	.right_margin	= 9,		.lower_margin	= 0,

	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

	.lccr0		= LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
	.lccr3		= LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),

	.backlight_power = assabet_lcd_backlight_power,
	.lcd_power = assabet_lcd_power,
	.set_visual = assabet_lcd_set_visual,
};
#else
static void assabet_pal_backlight_power(int on)
{
	ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
}

static void assabet_pal_power(int on)
{
	ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
}

static struct sa1100fb_mach_info pal_info = {
	.pixclock	= 67797,	.bpp		= 16,
	.xres		= 640,		.yres		= 512,

	.hsync_len	= 64,		.vsync_len	= 6,
	.left_margin	= 125,		.upper_margin	= 70,
	.right_margin	= 115,		.lower_margin	= 36,

	.lccr0		= LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
	.lccr3		= LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),

	.backlight_power = assabet_pal_backlight_power,
	.lcd_power = assabet_pal_power,
	.set_visual = assabet_lcd_set_visual,
};
#endif

#ifdef CONFIG_ASSABET_NEPONSET
static struct resource neponset_resources[] = {
	DEFINE_RES_MEM(0x10000000, 0x08000000),
	DEFINE_RES_MEM(0x18000000, 0x04000000),
	DEFINE_RES_MEM(0x40000000, SZ_8K),
	DEFINE_RES_IRQ(IRQ_GPIO25),
};
#endif

static void __init assabet_init(void)
{
	/*
	 * Ensure that the power supply is in "high power" mode.
	 */
	GPSR = GPIO_GPIO16;
	GPDR |= GPIO_GPIO16;

	/*
	 * Ensure that these pins are set as outputs and are driving
	 * logic 0.  This ensures that we won't inadvertently toggle
	 * the WS latch in the CPLD, and we don't float causing
	 * excessive power drain.  --rmk
	 */
	GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
	GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;

	/*
	 * Also set GPIO27 as an output; this is used to clock UART3
	 * via the FPGA and as otherwise has no pullups or pulldowns,
	 * so stop it floating.
	 */
	GPCR = GPIO_GPIO27;
	GPDR |= GPIO_GPIO27;

	/*
	 * Set up registers for sleep mode.
	 */
	PWER = PWER_GPIO0;
	PGSR = 0;
	PCFR = 0;
	PSDR = 0;
	PPDR |= PPC_TXD3 | PPC_TXD1;
	PPSR |= PPC_TXD3 | PPC_TXD1;

	sa11x0_ppc_configure_mcp();

	if (machine_has_neponset()) {
		/*
		 * Angel sets this, but other bootloaders may not.
		 *
		 * This must precede any driver calls to BCR_set()
		 * or BCR_clear().
		 */
		ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;

#ifndef CONFIG_ASSABET_NEPONSET
		printk( "Warning: Neponset detected but full support "
			"hasn't been configured in the kernel\n" );
#else
		platform_device_register_simple("neponset", 0,
			neponset_resources, ARRAY_SIZE(neponset_resources));
#endif
	}

#ifndef ASSABET_PAL_VIDEO
	sa11x0_register_lcd(&lq039q2ds54_info);
#else
	sa11x0_register_lcd(&pal_video);
#endif
	sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
			    ARRAY_SIZE(assabet_flash_resources));
	sa11x0_register_irda(&assabet_irda_data);
	sa11x0_register_mcp(&assabet_mcp_data);
}

/*
 * On Assabet, we must probe for the Neponset board _before_
 * paging_init() has occurred to actually determine the amount
 * of RAM available.  To do so, we map the appropriate IO section
 * in the page table here in order to access GPIO registers.
 */
static void __init map_sa1100_gpio_regs( void )
{
	unsigned long phys = __PREG(GPLR) & PMD_MASK;
	unsigned long virt = (unsigned long)io_p2v(phys);
	int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
	pmd_t *pmd;

	pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
	*pmd = __pmd(phys | prot);
	flush_pmd_entry(pmd);
}

/*
 * Read System Configuration "Register"
 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
 * User's Guide", section 4.4.1)
 *
 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
 * to set up the serial port for decompression status messages. We
 * repeat it here because the kernel may not be loaded as a zImage, and
 * also because it's a hassle to communicate the SCR value to the kernel
 * from the decompressor.
 *
 * Note that IRQs are guaranteed to be disabled.
 */
static void __init get_assabet_scr(void)
{
	unsigned long uninitialized_var(scr), i;

	GPDR |= 0x3fc;			/* Configure GPIO 9:2 as outputs */
	GPSR = 0x3fc;			/* Write 0xFF to GPIO 9:2 */
	GPDR &= ~(0x3fc);		/* Configure GPIO 9:2 as inputs */
	for(i = 100; i--; )		/* Read GPIO 9:2 */
		scr = GPLR;
	GPDR |= 0x3fc;			/*  restore correct pin direction */
	scr &= 0x3fc;			/* save as system configuration byte. */
	SCR_value = scr;
}

static void __init
fixup_assabet(struct tag *tags, char **cmdline)
{
	/* This must be done before any call to machine_has_neponset() */
	map_sa1100_gpio_regs();
	get_assabet_scr();

	if (machine_has_neponset())
		printk("Neponset expansion board detected\n");
}


static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
	if (port->mapbase == _Ser1UTCR0) {
		if (state)
			ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
					  ASSABET_BCR_COM_RTS |
					  ASSABET_BCR_COM_DTR);
		else
			ASSABET_BCR_set(ASSABET_BCR_RS232EN |
					ASSABET_BCR_COM_RTS |
					ASSABET_BCR_COM_DTR);
	}
}

/*
 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
 * and UART3 (radio module).  We only handle them for UART1 here.
 */
static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
{
	if (port->mapbase == _Ser1UTCR0) {
		u_int set = 0, clear = 0;

		if (mctrl & TIOCM_RTS)
			clear |= ASSABET_BCR_COM_RTS;
		else
			set |= ASSABET_BCR_COM_RTS;

		if (mctrl & TIOCM_DTR)
			clear |= ASSABET_BCR_COM_DTR;
		else
			set |= ASSABET_BCR_COM_DTR;

		ASSABET_BCR_clear(clear);
		ASSABET_BCR_set(set);
	}
}

static u_int assabet_get_mctrl(struct uart_port *port)
{
	u_int ret = 0;
	u_int bsr = ASSABET_BSR;

	/* need 2 reads to read current value */
	bsr = ASSABET_BSR;

	if (port->mapbase == _Ser1UTCR0) {
		if (bsr & ASSABET_BSR_COM_DCD)
			ret |= TIOCM_CD;
		if (bsr & ASSABET_BSR_COM_CTS)
			ret |= TIOCM_CTS;
		if (bsr & ASSABET_BSR_COM_DSR)
			ret |= TIOCM_DSR;
	} else if (port->mapbase == _Ser3UTCR0) {
		if (bsr & ASSABET_BSR_RAD_DCD)
			ret |= TIOCM_CD;
		if (bsr & ASSABET_BSR_RAD_CTS)
			ret |= TIOCM_CTS;
		if (bsr & ASSABET_BSR_RAD_DSR)
			ret |= TIOCM_DSR;
		if (bsr & ASSABET_BSR_RAD_RI)
			ret |= TIOCM_RI;
	} else {
		ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
	}

	return ret;
}

static struct sa1100_port_fns assabet_port_fns __initdata = {
	.set_mctrl	= assabet_set_mctrl,
	.get_mctrl	= assabet_get_mctrl,
	.pm		= assabet_uart_pm,
};

static struct map_desc assabet_io_desc[] __initdata = {
  	{	/* Board Control Register */
		.virtual	=  0xf1000000,
		.pfn		= __phys_to_pfn(0x12000000),
		.length		= 0x00100000,
		.type		= MT_DEVICE
	}, {	/* MQ200 */
		.virtual	=  0xf2800000,
		.pfn		= __phys_to_pfn(0x4b800000),
		.length		= 0x00800000,
		.type		= MT_DEVICE
	}
};

static void __init assabet_map_io(void)
{
	sa1100_map_io();
	iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));

	/*
	 * Set SUS bit in SDCR0 so serial port 1 functions.
	 * Its called GPCLKR0 in my SA1110 manual.
	 */
	Ser1SDCR0 |= SDCR0_SUS;
	MSC1 = (MSC1 & ~0xffff) |
		MSC_NonBrst | MSC_32BitStMem |
		MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);

	if (!machine_has_neponset())
		sa1100_register_uart_fns(&assabet_port_fns);

	/*
	 * When Neponset is attached, the first UART should be
	 * UART3.  That's what Angel is doing and many documents
	 * are stating this.
	 *
	 * We do the Neponset mapping even if Neponset support
	 * isn't compiled in so the user will still get something on
	 * the expected physical serial port.
	 *
	 * We no longer do this; not all boot loaders support it,
	 * and UART3 appears to be somewhat unreliable with blob.
	 */
	sa1100_register_uart(0, 1);
	sa1100_register_uart(2, 3);
}

/* LEDs */
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
struct assabet_led {
	struct led_classdev cdev;
	u32 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;
} assabet_leds[] = {
	{ "assabet:red", "cpu0",},
	{ "assabet:green", "heartbeat", },
};

/*
 * The LED control in Assabet is reversed:
 *  - setting bit means turn off LED
 *  - clearing bit means turn on LED
 */
static void assabet_led_set(struct led_classdev *cdev,
		enum led_brightness b)
{
	struct assabet_led *led = container_of(cdev,
			struct assabet_led, cdev);

	if (b != LED_OFF)
		ASSABET_BCR_clear(led->mask);
	else
		ASSABET_BCR_set(led->mask);
}

static enum led_brightness assabet_led_get(struct led_classdev *cdev)
{
	struct assabet_led *led = container_of(cdev,
			struct assabet_led, cdev);

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

static int __init assabet_leds_init(void)
{
	int i;

	if (!machine_is_assabet())
		return -ENODEV;

	for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
		struct assabet_led *led;

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

		led->cdev.name = assabet_leds[i].name;
		led->cdev.brightness_set = assabet_led_set;
		led->cdev.brightness_get = assabet_led_get;
		led->cdev.default_trigger = assabet_leds[i].trigger;

		if (!i)
			led->mask = ASSABET_BCR_LED_RED;
		else
			led->mask = ASSABET_BCR_LED_GREEN;

		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(assabet_leds_init);
#endif

MACHINE_START(ASSABET, "Intel-Assabet")
	.atag_offset	= 0x100,
	.fixup		= fixup_assabet,
	.map_io		= assabet_map_io,
	.nr_irqs	= SA1100_NR_IRQS,
	.init_irq	= sa1100_init_irq,
	.init_time	= sa1100_timer_init,
	.init_machine	= assabet_init,
	.init_late	= sa11x0_init_late,
#ifdef CONFIG_SA1111
	.dma_zone_size	= SZ_1M,
#endif
	.restart	= sa11x0_restart,
MACHINE_END