summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap1/board-htcherald.c
blob: 4af7bfa40e4a03ba3b2d3778aa99747e9b8291b3 (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
/*
 * HTC Herald board configuration
 * Copyright (C) 2009 Cory Maccarrone <darkstar6262@gmail.com>
 * Copyright (C) 2009 Wing Linux
 *
 * Based on the board-htcwizard.c file from the linwizard project:
 * Copyright (C) 2006 Unai Uribarri
 * Copyright (C) 2008 linwizard.sourceforge.net
 *
 * This  program is  free  software; you  can  redistribute it  and/or
 * modify  it under the  terms of  the GNU  General Public  License as
 * published by the Free Software  Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT  ANY  WARRANTY;  without   even  the  implied  warranty  of
 * MERCHANTABILITY or  FITNESS FOR A PARTICULAR PURPOSE.   See the GNU
 * General Public License for more details.
 *
 * You should have  received a copy of the  GNU General Public License
 * along  with  this program;  if  not,  write  to the  Free  Software
 * Foundation,  Inc.,  51 Franklin  Street,  Fifth  Floor, Boston,  MA
 * 02110-1301, USA.
 *
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/htcpld.h>
#include <linux/leds.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <plat/omap7xx.h>
#include <plat/common.h>
#include <plat/board.h>
#include <plat/keypad.h>
#include <plat/usb.h>
#include <plat/mmc.h>

#include <mach/irqs.h>

#include <linux/delay.h>

/* LCD register definition */
#define       OMAP_LCDC_CONTROL               (0xfffec000 + 0x00)
#define       OMAP_LCDC_STATUS                (0xfffec000 + 0x10)
#define       OMAP_DMA_LCD_CCR                (0xfffee300 + 0xc2)
#define       OMAP_DMA_LCD_CTRL               (0xfffee300 + 0xc4)
#define       OMAP_LCDC_CTRL_LCD_EN           (1 << 0)
#define       OMAP_LCDC_STAT_DONE             (1 << 0)

/* GPIO definitions for the power button and keyboard slide switch */
#define HTCHERALD_GPIO_POWER 139
#define HTCHERALD_GPIO_SLIDE 174
#define HTCHERALD_GIRQ_BTNS 141

/* GPIO definitions for the touchscreen */
#define HTCHERALD_GPIO_TS 76

/* HTCPLD definitions */

/*
 * CPLD Logic
 *
 * Chip 3 - 0x03
 *
 * Function            7 6 5 4  3 2 1 0
 * ------------------------------------
 * DPAD light          x x x x  x x x 1
 * SoundDev            x x x x  1 x x x
 * Screen white        1 x x x  x x x x
 * MMC power on        x x x x  x 1 x x
 * Happy times (n)     0 x x x  x 1 x x
 *
 * Chip 4 - 0x04
 *
 * Function            7 6 5 4  3 2 1 0
 * ------------------------------------
 * Keyboard light      x x x x  x x x 1
 * LCD Bright (4)      x x x x  x 1 1 x
 * LCD Bright (3)      x x x x  x 0 1 x
 * LCD Bright (2)      x x x x  x 1 0 x
 * LCD Bright (1)      x x x x  x 0 0 x
 * LCD Off             x x x x  0 x x x
 * LCD image (fb)      1 x x x  x x x x
 * LCD image (white)   0 x x x  x x x x
 * Caps lock LED       x x 1 x  x x x x
 *
 * Chip 5 - 0x05
 *
 * Function            7 6 5 4  3 2 1 0
 * ------------------------------------
 * Red (solid)         x x x x  x 1 x x
 * Red (flash)         x x x x  x x 1 x
 * Green (GSM flash)   x x x x  1 x x x
 * Green (GSM solid)   x x x 1  x x x x
 * Green (wifi flash)  x x 1 x  x x x x
 * Blue (bt flash)     x 1 x x  x x x x
 * DPAD Int Enable     1 x x x  x x x 0
 *
 * (Combinations of the above can be made for different colors.)
 * The direction pad interrupt enable must be set each time the
 * interrupt is handled.
 *
 * Chip 6 - 0x06
 *
 * Function            7 6 5 4  3 2 1 0
 * ------------------------------------
 * Vibrator            x x x x  1 x x x
 * Alt LED             x x x 1  x x x x
 * Screen white        1 x x x  x x x x
 * Screen white        x x 1 x  x x x x
 * Screen white        x 0 x x  x x x x
 * Enable kbd dpad     x x x x  x x 0 x
 * Happy Times         0 1 0 x  x x 0 x
 */

/*
 * HTCPLD GPIO lines start 16 after OMAP_MAX_GPIO_LINES to account
 * for the 16 MPUIO lines.
 */
#define HTCPLD_GPIO_START_OFFSET	(OMAP_MAX_GPIO_LINES + 16)
#define HTCPLD_IRQ(chip, offset)	(OMAP_IRQ_END + 8 * (chip) + (offset))
#define HTCPLD_BASE(chip, offset)	\
	(HTCPLD_GPIO_START_OFFSET + 8 * (chip) + (offset))

#define HTCPLD_GPIO_LED_DPAD		HTCPLD_BASE(0, 0)
#define HTCPLD_GPIO_LED_KBD		HTCPLD_BASE(1, 0)
#define HTCPLD_GPIO_LED_CAPS		HTCPLD_BASE(1, 5)
#define HTCPLD_GPIO_LED_RED_FLASH	HTCPLD_BASE(2, 1)
#define HTCPLD_GPIO_LED_RED_SOLID	HTCPLD_BASE(2, 2)
#define HTCPLD_GPIO_LED_GREEN_FLASH	HTCPLD_BASE(2, 3)
#define HTCPLD_GPIO_LED_GREEN_SOLID	HTCPLD_BASE(2, 4)
#define HTCPLD_GPIO_LED_WIFI		HTCPLD_BASE(2, 5)
#define HTCPLD_GPIO_LED_BT		HTCPLD_BASE(2, 6)
#define HTCPLD_GPIO_LED_VIBRATE		HTCPLD_BASE(3, 3)
#define HTCPLD_GPIO_LED_ALT		HTCPLD_BASE(3, 4)

#define HTCPLD_GPIO_RIGHT_KBD		HTCPLD_BASE(6, 7)
#define HTCPLD_GPIO_UP_KBD		HTCPLD_BASE(6, 6)
#define HTCPLD_GPIO_LEFT_KBD		HTCPLD_BASE(6, 5)
#define HTCPLD_GPIO_DOWN_KBD		HTCPLD_BASE(6, 4)

#define HTCPLD_GPIO_RIGHT_DPAD		HTCPLD_BASE(7, 7)
#define HTCPLD_GPIO_UP_DPAD		HTCPLD_BASE(7, 6)
#define HTCPLD_GPIO_LEFT_DPAD		HTCPLD_BASE(7, 5)
#define HTCPLD_GPIO_DOWN_DPAD		HTCPLD_BASE(7, 4)
#define HTCPLD_GPIO_ENTER_DPAD		HTCPLD_BASE(7, 3)

/*
 * The htcpld chip requires a gpio write to a specific line
 * to re-enable interrupts after one has occurred.
 */
#define HTCPLD_GPIO_INT_RESET_HI	HTCPLD_BASE(2, 7)
#define HTCPLD_GPIO_INT_RESET_LO	HTCPLD_BASE(2, 0)

/* Chip 5 */
#define HTCPLD_IRQ_RIGHT_KBD		HTCPLD_IRQ(0, 7)
#define HTCPLD_IRQ_UP_KBD		HTCPLD_IRQ(0, 6)
#define HTCPLD_IRQ_LEFT_KBD		HTCPLD_IRQ(0, 5)
#define HTCPLD_IRQ_DOWN_KBD		HTCPLD_IRQ(0, 4)

/* Chip 6 */
#define HTCPLD_IRQ_RIGHT_DPAD		HTCPLD_IRQ(1, 7)
#define HTCPLD_IRQ_UP_DPAD		HTCPLD_IRQ(1, 6)
#define HTCPLD_IRQ_LEFT_DPAD		HTCPLD_IRQ(1, 5)
#define HTCPLD_IRQ_DOWN_DPAD		HTCPLD_IRQ(1, 4)
#define HTCPLD_IRQ_ENTER_DPAD		HTCPLD_IRQ(1, 3)

/* Keyboard definition */

static const unsigned int htc_herald_keymap[] = {
	KEY(0, 0, KEY_RECORD), /* Mail button */
	KEY(1, 0, KEY_CAMERA), /* Camera */
	KEY(2, 0, KEY_PHONE), /* Send key */
	KEY(3, 0, KEY_VOLUMEUP), /* Volume up */
	KEY(4, 0, KEY_F2),  /* Right bar (landscape) */
	KEY(5, 0, KEY_MAIL), /* Win key (portrait) */
	KEY(6, 0, KEY_DIRECTORY), /* Right bar (protrait) */
	KEY(0, 1, KEY_LEFTCTRL), /* Windows key */
	KEY(1, 1, KEY_COMMA),
	KEY(2, 1, KEY_M),
	KEY(3, 1, KEY_K),
	KEY(4, 1, KEY_SLASH), /* OK key */
	KEY(5, 1, KEY_I),
	KEY(6, 1, KEY_U),
	KEY(0, 2, KEY_LEFTALT),
	KEY(1, 2, KEY_TAB),
	KEY(2, 2, KEY_N),
	KEY(3, 2, KEY_J),
	KEY(4, 2, KEY_ENTER),
	KEY(5, 2, KEY_H),
	KEY(6, 2, KEY_Y),
	KEY(0, 3, KEY_SPACE),
	KEY(1, 3, KEY_L),
	KEY(2, 3, KEY_B),
	KEY(3, 3, KEY_V),
	KEY(4, 3, KEY_BACKSPACE),
	KEY(5, 3, KEY_G),
	KEY(6, 3, KEY_T),
	KEY(0, 4, KEY_CAPSLOCK), /* Shift */
	KEY(1, 4, KEY_C),
	KEY(2, 4, KEY_F),
	KEY(3, 4, KEY_R),
	KEY(4, 4, KEY_O),
	KEY(5, 4, KEY_E),
	KEY(6, 4, KEY_D),
	KEY(0, 5, KEY_X),
	KEY(1, 5, KEY_Z),
	KEY(2, 5, KEY_S),
	KEY(3, 5, KEY_W),
	KEY(4, 5, KEY_P),
	KEY(5, 5, KEY_Q),
	KEY(6, 5, KEY_A),
	KEY(0, 6, KEY_CONNECT), /* Voice button */
	KEY(2, 6, KEY_CANCEL), /* End key */
	KEY(3, 6, KEY_VOLUMEDOWN), /* Volume down */
	KEY(4, 6, KEY_F1), /* Left bar (landscape) */
	KEY(5, 6, KEY_WWW), /* OK button (portrait) */
	KEY(6, 6, KEY_CALENDAR), /* Left bar (portrait) */
};

static const struct matrix_keymap_data htc_herald_keymap_data = {
	.keymap		= htc_herald_keymap,
	.keymap_size	= ARRAY_SIZE(htc_herald_keymap),
};

static struct omap_kp_platform_data htcherald_kp_data = {
	.rows	= 7,
	.cols	= 7,
	.delay = 20,
	.rep = true,
	.keymap_data = &htc_herald_keymap_data,
};

static struct resource kp_resources[] = {
	[0] = {
		.start	= INT_7XX_MPUIO_KEYPAD,
		.end	= INT_7XX_MPUIO_KEYPAD,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device kp_device = {
	.name		= "omap-keypad",
	.id		= -1,
	.dev		= {
		.platform_data = &htcherald_kp_data,
	},
	.num_resources	= ARRAY_SIZE(kp_resources),
	.resource	= kp_resources,
};

/* GPIO buttons for keyboard slide and power button */
static struct gpio_keys_button herald_gpio_keys_table[] = {
	{BTN_0,  HTCHERALD_GPIO_POWER, 1, "POWER", EV_KEY, 1, 20},
	{SW_LID, HTCHERALD_GPIO_SLIDE, 0, "SLIDE", EV_SW,  1, 20},

	{KEY_LEFT,  HTCPLD_GPIO_LEFT_KBD,  1, "LEFT",  EV_KEY, 1, 20},
	{KEY_RIGHT, HTCPLD_GPIO_RIGHT_KBD, 1, "RIGHT", EV_KEY, 1, 20},
	{KEY_UP,    HTCPLD_GPIO_UP_KBD,    1, "UP",    EV_KEY, 1, 20},
	{KEY_DOWN,  HTCPLD_GPIO_DOWN_KBD,  1, "DOWN",  EV_KEY, 1, 20},

	{KEY_LEFT,  HTCPLD_GPIO_LEFT_DPAD,   1, "DLEFT",  EV_KEY, 1, 20},
	{KEY_RIGHT, HTCPLD_GPIO_RIGHT_DPAD,  1, "DRIGHT", EV_KEY, 1, 20},
	{KEY_UP,    HTCPLD_GPIO_UP_DPAD,     1, "DUP",    EV_KEY, 1, 20},
	{KEY_DOWN,  HTCPLD_GPIO_DOWN_DPAD,   1, "DDOWN",  EV_KEY, 1, 20},
	{KEY_ENTER, HTCPLD_GPIO_ENTER_DPAD,  1, "DENTER", EV_KEY, 1, 20},
};

static struct gpio_keys_platform_data herald_gpio_keys_data = {
	.buttons	= herald_gpio_keys_table,
	.nbuttons	= ARRAY_SIZE(herald_gpio_keys_table),
	.rep		= true,
};

static struct platform_device herald_gpiokeys_device = {
	.name      = "gpio-keys",
	.id		= -1,
	.dev = {
		.platform_data = &herald_gpio_keys_data,
	},
};

/* LEDs for the Herald.  These connect to the HTCPLD GPIO device. */
static struct gpio_led gpio_leds[] = {
	{"dpad",        NULL, HTCPLD_GPIO_LED_DPAD,        0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"kbd",         NULL, HTCPLD_GPIO_LED_KBD,         0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"vibrate",     NULL, HTCPLD_GPIO_LED_VIBRATE,     0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"green_solid", NULL, HTCPLD_GPIO_LED_GREEN_SOLID, 0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"green_flash", NULL, HTCPLD_GPIO_LED_GREEN_FLASH, 0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"red_solid",   "mmc0", HTCPLD_GPIO_LED_RED_SOLID, 0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"red_flash",   NULL, HTCPLD_GPIO_LED_RED_FLASH,   0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"wifi",        NULL, HTCPLD_GPIO_LED_WIFI,        0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"bt",          NULL, HTCPLD_GPIO_LED_BT,          0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"caps",        NULL, HTCPLD_GPIO_LED_CAPS,        0, 0, LEDS_GPIO_DEFSTATE_OFF},
	{"alt",         NULL, HTCPLD_GPIO_LED_ALT,         0, 0, LEDS_GPIO_DEFSTATE_OFF},
};

static struct gpio_led_platform_data gpio_leds_data = {
	.leds		= gpio_leds,
	.num_leds	= ARRAY_SIZE(gpio_leds),
};

static struct platform_device gpio_leds_device = {
	.name		= "leds-gpio",
	.id		= 0,
	.dev	= {
		.platform_data	= &gpio_leds_data,
	},
};

/* HTC PLD chips */

static struct resource htcpld_resources[] = {
	[0] = {
		.start  = OMAP_GPIO_IRQ(HTCHERALD_GIRQ_BTNS),
		.end    = OMAP_GPIO_IRQ(HTCHERALD_GIRQ_BTNS),
		.flags  = IORESOURCE_IRQ,
	},
};

static struct htcpld_chip_platform_data htcpld_chips[] = {
	[0] = {
		.addr		= 0x03,
		.reset		= 0x04,
		.num_gpios	= 8,
		.gpio_out_base	= HTCPLD_BASE(0, 0),
		.gpio_in_base	= HTCPLD_BASE(4, 0),
	},
	[1] = {
		.addr		= 0x04,
		.reset		= 0x8e,
		.num_gpios	= 8,
		.gpio_out_base	= HTCPLD_BASE(1, 0),
		.gpio_in_base	= HTCPLD_BASE(5, 0),
	},
	[2] = {
		.addr		= 0x05,
		.reset		= 0x80,
		.num_gpios	= 8,
		.gpio_out_base	= HTCPLD_BASE(2, 0),
		.gpio_in_base	= HTCPLD_BASE(6, 0),
		.irq_base	= HTCPLD_IRQ(0, 0),
		.num_irqs	= 8,
	},
	[3] = {
		.addr		= 0x06,
		.reset		= 0x40,
		.num_gpios	= 8,
		.gpio_out_base	= HTCPLD_BASE(3, 0),
		.gpio_in_base	= HTCPLD_BASE(7, 0),
		.irq_base	= HTCPLD_IRQ(1, 0),
		.num_irqs	= 8,
	},
};

static struct htcpld_core_platform_data htcpld_pfdata = {
	.int_reset_gpio_hi = HTCPLD_GPIO_INT_RESET_HI,
	.int_reset_gpio_lo = HTCPLD_GPIO_INT_RESET_LO,
	.i2c_adapter_id	   = 1,

	.chip		   = htcpld_chips,
	.num_chip	   = ARRAY_SIZE(htcpld_chips),
};

static struct platform_device htcpld_device = {
	.name		= "i2c-htcpld",
	.id		= -1,
	.resource	= htcpld_resources,
	.num_resources	= ARRAY_SIZE(htcpld_resources),
	.dev	= {
		.platform_data	= &htcpld_pfdata,
	},
};

/* USB Device */
static struct omap_usb_config htcherald_usb_config __initdata = {
	.otg = 0,
	.register_host = 0,
	.register_dev  = 1,
	.hmc_mode = 4,
	.pins[0] = 2,
};

/* LCD Device resources */
static struct omap_lcd_config htcherald_lcd_config __initdata = {
	.ctrl_name	= "internal",
};

static struct omap_board_config_kernel htcherald_config[] __initdata = {
	{ OMAP_TAG_LCD, &htcherald_lcd_config },
};

static struct platform_device lcd_device = {
	.name           = "lcd_htcherald",
	.id             = -1,
};

/* MMC Card */
#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
static struct omap_mmc_platform_data htc_mmc1_data = {
	.nr_slots                       = 1,
	.switch_slot                    = NULL,
	.slots[0]       = {
		.ocr_mask               = MMC_VDD_32_33 | MMC_VDD_33_34,
		.name                   = "mmcblk",
		.nomux                  = 1,
		.wires                  = 4,
		.switch_pin             = -1,
	},
};

static struct omap_mmc_platform_data *htc_mmc_data[1];
#endif


/* Platform devices for the Herald */
static struct platform_device *devices[] __initdata = {
	&kp_device,
	&lcd_device,
	&htcpld_device,
	&gpio_leds_device,
	&herald_gpiokeys_device,
};

/*
 * Touchscreen
 */
static const struct ads7846_platform_data htcherald_ts_platform_data = {
	.model			= 7846,
	.keep_vref_on		= 1,
	.x_plate_ohms		= 496,
	.gpio_pendown		= HTCHERALD_GPIO_TS,
	.pressure_max		= 10000,
	.pressure_min		= 5000,
	.x_min			= 528,
	.x_max			= 3760,
	.y_min			= 624,
	.y_max			= 3760,
};

static struct spi_board_info __initdata htcherald_spi_board_info[] = {
	{
		.modalias		= "ads7846",
		.platform_data		= &htcherald_ts_platform_data,
		.irq			= OMAP_GPIO_IRQ(HTCHERALD_GPIO_TS),
		.max_speed_hz		= 2500000,
		.bus_num		= 2,
		.chip_select		= 1,
	}
};

/*
 * Init functions from here on
 */

static void __init htcherald_lcd_init(void)
{
	u32 reg;
	unsigned int tries = 200;

	/* disable controller if active */
	reg = omap_readl(OMAP_LCDC_CONTROL);
	if (reg & OMAP_LCDC_CTRL_LCD_EN) {
		reg &= ~OMAP_LCDC_CTRL_LCD_EN;
		omap_writel(reg, OMAP_LCDC_CONTROL);

		/* wait for end of frame */
		while (!(omap_readl(OMAP_LCDC_STATUS) & OMAP_LCDC_STAT_DONE)) {
			tries--;
			if (!tries)
				break;
		}
		if (!tries)
			printk(KERN_WARNING "Timeout waiting for end of frame "
			       "-- LCD may not be available\n");

		/* turn off DMA */
		reg = omap_readw(OMAP_DMA_LCD_CCR);
		reg &= ~(1 << 7);
		omap_writew(reg, OMAP_DMA_LCD_CCR);

		reg = omap_readw(OMAP_DMA_LCD_CTRL);
		reg &= ~(1 << 8);
		omap_writew(reg, OMAP_DMA_LCD_CTRL);
	}
}

static void __init htcherald_map_io(void)
{
	omap1_map_common_io();

	/*
	 * The LCD panel must be disabled and DMA turned off here, as doing
	 * it later causes the LCD never to reinitialize.
	 */
	htcherald_lcd_init();

	printk(KERN_INFO "htcherald_map_io done.\n");
}

static void __init htcherald_disable_watchdog(void)
{
	/* Disable watchdog if running */
	if (omap_readl(OMAP_WDT_TIMER_MODE) & 0x8000) {
		/*
		 * disable a potentially running watchdog timer before
		 * it kills us.
		 */
		printk(KERN_WARNING "OMAP850 Watchdog seems to be activated, disabling it for now.\n");
		omap_writel(0xF5, OMAP_WDT_TIMER_MODE);
		omap_writel(0xA0, OMAP_WDT_TIMER_MODE);
	}
}

#define HTCHERALD_GPIO_USB_EN1 33
#define HTCHERALD_GPIO_USB_EN2 73
#define HTCHERALD_GPIO_USB_DM  35
#define HTCHERALD_GPIO_USB_DP  36

static void __init htcherald_usb_enable(void)
{
	unsigned int tries = 20;
	unsigned int value = 0;

	/* Request the GPIOs we need to control here */
	if (gpio_request(HTCHERALD_GPIO_USB_EN1, "herald_usb") < 0)
		goto err1;

	if (gpio_request(HTCHERALD_GPIO_USB_EN2, "herald_usb") < 0)
		goto err2;

	if (gpio_request(HTCHERALD_GPIO_USB_DM, "herald_usb") < 0)
		goto err3;

	if (gpio_request(HTCHERALD_GPIO_USB_DP, "herald_usb") < 0)
		goto err4;

	/* force USB_EN GPIO to 0 */
	do {
		/* output low */
		gpio_direction_output(HTCHERALD_GPIO_USB_EN1, 0);
	} while ((value = gpio_get_value(HTCHERALD_GPIO_USB_EN1)) == 1 &&
			--tries);

	if (value == 1)
		printk(KERN_WARNING "Unable to reset USB, trying to continue\n");

	gpio_direction_output(HTCHERALD_GPIO_USB_EN2, 0); /* output low */
	gpio_direction_input(HTCHERALD_GPIO_USB_DM); /* input */
	gpio_direction_input(HTCHERALD_GPIO_USB_DP); /* input */

	goto done;

err4:
	gpio_free(HTCHERALD_GPIO_USB_DM);
err3:
	gpio_free(HTCHERALD_GPIO_USB_EN2);
err2:
	gpio_free(HTCHERALD_GPIO_USB_EN1);
err1:
	printk(KERN_ERR "Unabled to request GPIO for USB\n");
done:
	printk(KERN_INFO "USB setup complete.\n");
}

static void __init htcherald_init(void)
{
	printk(KERN_INFO "HTC Herald init.\n");

	/* Do board initialization before we register all the devices */
	omap_board_config = htcherald_config;
	omap_board_config_size = ARRAY_SIZE(htcherald_config);
	platform_add_devices(devices, ARRAY_SIZE(devices));

	htcherald_disable_watchdog();

	htcherald_usb_enable();
	omap1_usb_init(&htcherald_usb_config);

	spi_register_board_info(htcherald_spi_board_info,
		ARRAY_SIZE(htcherald_spi_board_info));

	omap_register_i2c_bus(1, 100, NULL, 0);

#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
	htc_mmc_data[0] = &htc_mmc1_data;
	omap1_init_mmc(htc_mmc_data, 1);
#endif
}

static void __init htcherald_init_irq(void)
{
	printk(KERN_INFO "htcherald_init_irq.\n");
	omap1_init_common_hw();
	omap1_init_irq();
}

MACHINE_START(HERALD, "HTC Herald")
	/* Maintainer: Cory Maccarrone <darkstar6262@gmail.com> */
	/* Maintainer: wing-linux.sourceforge.net */
	.boot_params    = 0x10000100,
	.map_io         = htcherald_map_io,
	.reserve	= omap_reserve,
	.init_irq       = htcherald_init_irq,
	.init_machine   = htcherald_init,
	.timer          = &omap1_timer,
MACHINE_END