summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa/balloon3.c
blob: 09b9a36049c73dfa6abe8d914f324f8595cb5137 (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
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
/*
 *  linux/arch/arm/mach-pxa/balloon3.c
 *
 *  Support for Balloonboard.org Balloon3 board.
 *
 *  Author:	Nick Bane, Wookey, Jonathan McDowell
 *  Created:	June, 2006
 *  Copyright:	Toby Churchill Ltd
 *  Derived from mainstone.c, by Nico Pitre
 *
 *  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/export.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/bitops.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/ioport.h>
#include <linux/ucb1400.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/types.h>
#include <linux/i2c/pcf857x.h>
#include <linux/i2c/pxa-i2c.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/physmap.h>
#include <linux/regulator/max1586.h>

#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <asm/sizes.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>

#include <mach/pxa27x.h>
#include <mach/balloon3.h>
#include <mach/audio.h>
#include <linux/platform_data/video-pxafb.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <mach/udc.h>
#include <mach/pxa27x-udc.h>
#include <linux/platform_data/irda-pxaficp.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>

#include "generic.h"
#include "devices.h"

/******************************************************************************
 * Pin configuration
 ******************************************************************************/
static unsigned long balloon3_pin_config[] __initdata = {
	/* Select BTUART 'COM1/ttyS0' as IO option for pins 42/43/44/45 */
	GPIO42_BTUART_RXD,
	GPIO43_BTUART_TXD,
	GPIO44_BTUART_CTS,
	GPIO45_BTUART_RTS,

	/* Reset, configured as GPIO wakeup source */
	GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
};

/******************************************************************************
 * Compatibility: Parameter parsing
 ******************************************************************************/
static unsigned long balloon3_irq_enabled;

static unsigned long balloon3_features_present =
		(1 << BALLOON3_FEATURE_OHCI) | (1 << BALLOON3_FEATURE_CF) |
		(1 << BALLOON3_FEATURE_AUDIO) |
		(1 << BALLOON3_FEATURE_TOPPOLY);

int balloon3_has(enum balloon3_features feature)
{
	return (balloon3_features_present & (1 << feature)) ? 1 : 0;
}
EXPORT_SYMBOL_GPL(balloon3_has);

int __init parse_balloon3_features(char *arg)
{
	if (!arg)
		return 0;

	return kstrtoul(arg, 0, &balloon3_features_present);
}
early_param("balloon3_features", parse_balloon3_features);

/******************************************************************************
 * Compact Flash slot
 ******************************************************************************/
#if	defined(CONFIG_PCMCIA_PXA2XX) || defined(CONFIG_PCMCIA_PXA2XX_MODULE)
static unsigned long balloon3_cf_pin_config[] __initdata = {
	GPIO48_nPOE,
	GPIO49_nPWE,
	GPIO50_nPIOR,
	GPIO51_nPIOW,
	GPIO85_nPCE_1,
	GPIO54_nPCE_2,
	GPIO79_PSKTSEL,
	GPIO55_nPREG,
	GPIO56_nPWAIT,
	GPIO57_nIOIS16,
};

static void __init balloon3_cf_init(void)
{
	if (!balloon3_has(BALLOON3_FEATURE_CF))
		return;

	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_cf_pin_config));
}
#else
static inline void balloon3_cf_init(void) {}
#endif

/******************************************************************************
 * NOR Flash
 ******************************************************************************/
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
static struct mtd_partition balloon3_nor_partitions[] = {
	{
		.name		= "Flash",
		.offset		= 0x00000000,
		.size		= MTDPART_SIZ_FULL,
	}
};

static struct physmap_flash_data balloon3_flash_data[] = {
	{
		.width		= 2,	/* bankwidth in bytes */
		.parts		= balloon3_nor_partitions,
		.nr_parts	= ARRAY_SIZE(balloon3_nor_partitions)
	}
};

static struct resource balloon3_flash_resource = {
	.start	= PXA_CS0_PHYS,
	.end	= PXA_CS0_PHYS + SZ_64M - 1,
	.flags	= IORESOURCE_MEM,
};

static struct platform_device balloon3_flash = {
	.name		= "physmap-flash",
	.id		= 0,
	.resource	= &balloon3_flash_resource,
	.num_resources	= 1,
	.dev 		= {
		.platform_data = balloon3_flash_data,
	},
};
static void __init balloon3_nor_init(void)
{
	platform_device_register(&balloon3_flash);
}
#else
static inline void balloon3_nor_init(void) {}
#endif

/******************************************************************************
 * Audio and Touchscreen
 ******************************************************************************/
#if	defined(CONFIG_TOUCHSCREEN_UCB1400) || \
	defined(CONFIG_TOUCHSCREEN_UCB1400_MODULE)
static unsigned long balloon3_ac97_pin_config[] __initdata = {
	GPIO28_AC97_BITCLK,
	GPIO29_AC97_SDATA_IN_0,
	GPIO30_AC97_SDATA_OUT,
	GPIO31_AC97_SYNC,
	GPIO113_AC97_nRESET,
	GPIO95_GPIO,
};

static struct ucb1400_pdata vpac270_ucb1400_pdata = {
	.irq		= PXA_GPIO_TO_IRQ(BALLOON3_GPIO_CODEC_IRQ),
};


static struct platform_device balloon3_ucb1400_device = {
	.name		= "ucb1400_core",
	.id		= -1,
	.dev		= {
		.platform_data = &vpac270_ucb1400_pdata,
	},
};

static void __init balloon3_ts_init(void)
{
	if (!balloon3_has(BALLOON3_FEATURE_AUDIO))
		return;

	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ac97_pin_config));
	pxa_set_ac97_info(NULL);
	platform_device_register(&balloon3_ucb1400_device);
}
#else
static inline void balloon3_ts_init(void) {}
#endif

/******************************************************************************
 * Framebuffer
 ******************************************************************************/
#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
static unsigned long balloon3_lcd_pin_config[] __initdata = {
	GPIOxx_LCD_TFT_16BPP,
	GPIO99_GPIO,
};

static struct pxafb_mode_info balloon3_lcd_modes[] = {
	{
		.pixclock		= 38000,
		.xres			= 480,
		.yres			= 640,
		.bpp			= 16,
		.hsync_len		= 8,
		.left_margin		= 8,
		.right_margin		= 8,
		.vsync_len		= 2,
		.upper_margin		= 4,
		.lower_margin		= 5,
		.sync			= 0,
	},
};

static struct pxafb_mach_info balloon3_lcd_screen = {
	.modes			= balloon3_lcd_modes,
	.num_modes		= ARRAY_SIZE(balloon3_lcd_modes),
	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};

static void balloon3_backlight_power(int on)
{
	gpio_set_value(BALLOON3_GPIO_RUN_BACKLIGHT, on);
}

static void __init balloon3_lcd_init(void)
{
	int ret;

	if (!balloon3_has(BALLOON3_FEATURE_TOPPOLY))
		return;

	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_lcd_pin_config));

	ret = gpio_request(BALLOON3_GPIO_RUN_BACKLIGHT, "BKL-ON");
	if (ret) {
		pr_err("Requesting BKL-ON GPIO failed!\n");
		goto err;
	}

	ret = gpio_direction_output(BALLOON3_GPIO_RUN_BACKLIGHT, 1);
	if (ret) {
		pr_err("Setting BKL-ON GPIO direction failed!\n");
		goto err2;
	}

	balloon3_lcd_screen.pxafb_backlight_power = balloon3_backlight_power;
	pxa_set_fb_info(NULL, &balloon3_lcd_screen);
	return;

err2:
	gpio_free(BALLOON3_GPIO_RUN_BACKLIGHT);
err:
	return;
}
#else
static inline void balloon3_lcd_init(void) {}
#endif

/******************************************************************************
 * SD/MMC card controller
 ******************************************************************************/
#if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
static unsigned long balloon3_mmc_pin_config[] __initdata = {
	GPIO32_MMC_CLK,
	GPIO92_MMC_DAT_0,
	GPIO109_MMC_DAT_1,
	GPIO110_MMC_DAT_2,
	GPIO111_MMC_DAT_3,
	GPIO112_MMC_CMD,
};

static struct pxamci_platform_data balloon3_mci_platform_data = {
	.ocr_mask		= MMC_VDD_32_33 | MMC_VDD_33_34,
	.gpio_card_detect	= -1,
	.gpio_card_ro		= -1,
	.gpio_power		= -1,
	.detect_delay_ms	= 200,
};

static void __init balloon3_mmc_init(void)
{
	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_mmc_pin_config));
	pxa_set_mci_info(&balloon3_mci_platform_data);
}
#else
static inline void balloon3_mmc_init(void) {}
#endif

/******************************************************************************
 * USB Gadget
 ******************************************************************************/
#if defined(CONFIG_USB_PXA27X)||defined(CONFIG_USB_PXA27X_MODULE)
static void balloon3_udc_command(int cmd)
{
	if (cmd == PXA2XX_UDC_CMD_CONNECT)
		UP2OCR |= UP2OCR_DPPUE | UP2OCR_DPPUBE;
	else if (cmd == PXA2XX_UDC_CMD_DISCONNECT)
		UP2OCR &= ~UP2OCR_DPPUE;
}

static int balloon3_udc_is_connected(void)
{
	return 1;
}

static struct pxa2xx_udc_mach_info balloon3_udc_info __initdata = {
	.udc_command		= balloon3_udc_command,
	.udc_is_connected	= balloon3_udc_is_connected,
	.gpio_pullup		= -1,
};

static void __init balloon3_udc_init(void)
{
	pxa_set_udc_info(&balloon3_udc_info);
}
#else
static inline void balloon3_udc_init(void) {}
#endif

/******************************************************************************
 * IrDA
 ******************************************************************************/
#if defined(CONFIG_IRDA) || defined(CONFIG_IRDA_MODULE)
static struct pxaficp_platform_data balloon3_ficp_platform_data = {
	.transceiver_cap	= IR_FIRMODE | IR_SIRMODE | IR_OFF,
};

static void __init balloon3_irda_init(void)
{
	pxa_set_ficp_info(&balloon3_ficp_platform_data);
}
#else
static inline void balloon3_irda_init(void) {}
#endif

/******************************************************************************
 * USB Host
 ******************************************************************************/
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static unsigned long balloon3_uhc_pin_config[] __initdata = {
	GPIO88_USBH1_PWR,
	GPIO89_USBH1_PEN,
};

static struct pxaohci_platform_data balloon3_ohci_info = {
	.port_mode	= PMM_PERPORT_MODE,
	.flags		= ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
};

static void __init balloon3_uhc_init(void)
{
	if (!balloon3_has(BALLOON3_FEATURE_OHCI))
		return;
	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_uhc_pin_config));
	pxa_set_ohci_info(&balloon3_ohci_info);
}
#else
static inline void balloon3_uhc_init(void) {}
#endif

/******************************************************************************
 * LEDs
 ******************************************************************************/
#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
static unsigned long balloon3_led_pin_config[] __initdata = {
	GPIO9_GPIO,	/* NAND activity LED */
	GPIO10_GPIO,	/* Heartbeat LED */
};

struct gpio_led balloon3_gpio_leds[] = {
	{
		.name			= "balloon3:green:idle",
		.default_trigger	= "heartbeat",
		.gpio			= BALLOON3_GPIO_LED_IDLE,
		.active_low		= 1,
	}, {
		.name			= "balloon3:green:nand",
		.default_trigger	= "nand-disk",
		.gpio			= BALLOON3_GPIO_LED_NAND,
		.active_low		= 1,
	},
};

static struct gpio_led_platform_data balloon3_gpio_led_info = {
	.leds		= balloon3_gpio_leds,
	.num_leds	= ARRAY_SIZE(balloon3_gpio_leds),
};

static struct platform_device balloon3_leds = {
	.name	= "leds-gpio",
	.id	= 0,
	.dev	= {
		.platform_data	= &balloon3_gpio_led_info,
	}
};

struct gpio_led balloon3_pcf_gpio_leds[] = {
	{
		.name			= "balloon3:green:led0",
		.gpio			= BALLOON3_PCF_GPIO_LED0,
		.active_low		= 1,
	}, {
		.name			= "balloon3:green:led1",
		.gpio			= BALLOON3_PCF_GPIO_LED1,
		.active_low		= 1,
	}, {
		.name			= "balloon3:orange:led2",
		.gpio			= BALLOON3_PCF_GPIO_LED2,
		.active_low		= 1,
	}, {
		.name			= "balloon3:orange:led3",
		.gpio			= BALLOON3_PCF_GPIO_LED3,
		.active_low		= 1,
	}, {
		.name			= "balloon3:orange:led4",
		.gpio			= BALLOON3_PCF_GPIO_LED4,
		.active_low		= 1,
	}, {
		.name			= "balloon3:orange:led5",
		.gpio			= BALLOON3_PCF_GPIO_LED5,
		.active_low		= 1,
	}, {
		.name			= "balloon3:red:led6",
		.gpio			= BALLOON3_PCF_GPIO_LED6,
		.active_low		= 1,
	}, {
		.name			= "balloon3:red:led7",
		.gpio			= BALLOON3_PCF_GPIO_LED7,
		.active_low		= 1,
	},
};

static struct gpio_led_platform_data balloon3_pcf_gpio_led_info = {
	.leds		= balloon3_pcf_gpio_leds,
	.num_leds	= ARRAY_SIZE(balloon3_pcf_gpio_leds),
};

static struct platform_device balloon3_pcf_leds = {
	.name	= "leds-gpio",
	.id	= 1,
	.dev	= {
		.platform_data	= &balloon3_pcf_gpio_led_info,
	}
};

static void __init balloon3_leds_init(void)
{
	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_led_pin_config));
	platform_device_register(&balloon3_leds);
	platform_device_register(&balloon3_pcf_leds);
}
#else
static inline void balloon3_leds_init(void) {}
#endif

/******************************************************************************
 * FPGA IRQ
 ******************************************************************************/
static void balloon3_mask_irq(struct irq_data *d)
{
	int balloon3_irq = (d->irq - BALLOON3_IRQ(0));
	balloon3_irq_enabled &= ~(1 << balloon3_irq);
	__raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static void balloon3_unmask_irq(struct irq_data *d)
{
	int balloon3_irq = (d->irq - BALLOON3_IRQ(0));
	balloon3_irq_enabled |= (1 << balloon3_irq);
	__raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static struct irq_chip balloon3_irq_chip = {
	.name		= "FPGA",
	.irq_ack	= balloon3_mask_irq,
	.irq_mask	= balloon3_mask_irq,
	.irq_unmask	= balloon3_unmask_irq,
};

static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
{
	unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
					balloon3_irq_enabled;
	do {
		/* clear useless edge notification */
		if (desc->irq_data.chip->irq_ack) {
			struct irq_data *d;

			d = irq_get_irq_data(BALLOON3_AUX_NIRQ);
			desc->irq_data.chip->irq_ack(d);
		}

		while (pending) {
			irq = BALLOON3_IRQ(0) + __ffs(pending);
			generic_handle_irq(irq);
			pending &= pending - 1;
		}
		pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
				balloon3_irq_enabled;
	} while (pending);
}

static void __init balloon3_init_irq(void)
{
	int irq;

	pxa27x_init_irq();
	/* setup extra Balloon3 irqs */
	for (irq = BALLOON3_IRQ(0); irq <= BALLOON3_IRQ(7); irq++) {
		irq_set_chip_and_handler(irq, &balloon3_irq_chip,
					 handle_level_irq);
		irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
	}

	irq_set_chained_handler(BALLOON3_AUX_NIRQ, balloon3_irq_handler);
	irq_set_irq_type(BALLOON3_AUX_NIRQ, IRQ_TYPE_EDGE_FALLING);

	pr_debug("%s: chained handler installed - irq %d automatically "
		"enabled\n", __func__, BALLOON3_AUX_NIRQ);
}

/******************************************************************************
 * GPIO expander
 ******************************************************************************/
#if defined(CONFIG_GPIO_PCF857X) || defined(CONFIG_GPIO_PCF857X_MODULE)
static struct pcf857x_platform_data balloon3_pcf857x_pdata = {
	.gpio_base	= BALLOON3_PCF_GPIO_BASE,
	.n_latch	= 0,
	.setup		= NULL,
	.teardown	= NULL,
	.context	= NULL,
};

static struct i2c_board_info __initdata balloon3_i2c_devs[] = {
	{
		I2C_BOARD_INFO("pcf8574a", 0x38),
		.platform_data	= &balloon3_pcf857x_pdata,
	},
};

static void __init balloon3_i2c_init(void)
{
	pxa_set_i2c_info(NULL);
	i2c_register_board_info(0, ARRAY_AND_SIZE(balloon3_i2c_devs));
}
#else
static inline void balloon3_i2c_init(void) {}
#endif

/******************************************************************************
 * NAND
 ******************************************************************************/
#if defined(CONFIG_MTD_NAND_PLATFORM)||defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
static void balloon3_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
	struct nand_chip *this = mtd->priv;
	uint8_t balloon3_ctl_set = 0, balloon3_ctl_clr = 0;

	if (ctrl & NAND_CTRL_CHANGE) {
		if (ctrl & NAND_CLE)
			balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLCLE;
		else
			balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLCLE;

		if (ctrl & NAND_ALE)
			balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLALE;
		else
			balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLALE;

		if (balloon3_ctl_clr)
			__raw_writel(balloon3_ctl_clr,
				BALLOON3_NAND_CONTROL_REG);
		if (balloon3_ctl_set)
			__raw_writel(balloon3_ctl_set,
				BALLOON3_NAND_CONTROL_REG +
				BALLOON3_FPGA_SETnCLR);
	}

	if (cmd != NAND_CMD_NONE)
		writeb(cmd, this->IO_ADDR_W);
}

static void balloon3_nand_select_chip(struct mtd_info *mtd, int chip)
{
	if (chip < 0 || chip > 3)
		return;

	/* Assert all nCE lines */
	__raw_writew(
		BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
		BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3,
		BALLOON3_NAND_CONTROL_REG + BALLOON3_FPGA_SETnCLR);

	/* Deassert correct nCE line */
	__raw_writew(BALLOON3_NAND_CONTROL_FLCE0 << chip,
		BALLOON3_NAND_CONTROL_REG);
}

static int balloon3_nand_dev_ready(struct mtd_info *mtd)
{
	return __raw_readl(BALLOON3_NAND_STAT_REG) & BALLOON3_NAND_STAT_RNB;
}

static int balloon3_nand_probe(struct platform_device *pdev)
{
	uint16_t ver;
	int ret;

	__raw_writew(BALLOON3_NAND_CONTROL2_16BIT,
		BALLOON3_NAND_CONTROL2_REG + BALLOON3_FPGA_SETnCLR);

	ver = __raw_readw(BALLOON3_FPGA_VER);
	if (ver < 0x4f08)
		pr_warn("The FPGA code, version 0x%04x, is too old. "
			"NAND support might be broken in this version!", ver);

	/* Power up the NAND chips */
	ret = gpio_request(BALLOON3_GPIO_RUN_NAND, "NAND");
	if (ret)
		goto err1;

	ret = gpio_direction_output(BALLOON3_GPIO_RUN_NAND, 1);
	if (ret)
		goto err2;

	gpio_set_value(BALLOON3_GPIO_RUN_NAND, 1);

	/* Deassert all nCE lines and write protect line */
	__raw_writel(
		BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
		BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3 |
		BALLOON3_NAND_CONTROL_FLWP,
		BALLOON3_NAND_CONTROL_REG + BALLOON3_FPGA_SETnCLR);
	return 0;

err2:
	gpio_free(BALLOON3_GPIO_RUN_NAND);
err1:
	return ret;
}

static void balloon3_nand_remove(struct platform_device *pdev)
{
	/* Power down the NAND chips */
	gpio_set_value(BALLOON3_GPIO_RUN_NAND, 0);
	gpio_free(BALLOON3_GPIO_RUN_NAND);
}

static struct mtd_partition balloon3_partition_info[] = {
	[0] = {
		.name	= "Boot",
		.offset	= 0,
		.size	= SZ_4M,
	},
	[1] = {
		.name	= "RootFS",
		.offset	= MTDPART_OFS_APPEND,
		.size	= MTDPART_SIZ_FULL
	},
};

struct platform_nand_data balloon3_nand_pdata = {
	.chip = {
		.nr_chips	= 4,
		.chip_offset	= 0,
		.nr_partitions	= ARRAY_SIZE(balloon3_partition_info),
		.partitions	= balloon3_partition_info,
		.chip_delay	= 50,
	},
	.ctrl = {
		.hwcontrol	= 0,
		.dev_ready	= balloon3_nand_dev_ready,
		.select_chip	= balloon3_nand_select_chip,
		.cmd_ctrl	= balloon3_nand_cmd_ctl,
		.probe		= balloon3_nand_probe,
		.remove		= balloon3_nand_remove,
	},
};

static struct resource balloon3_nand_resource[] = {
	[0] = {
		.start = BALLOON3_NAND_BASE,
		.end   = BALLOON3_NAND_BASE + 0x4,
		.flags = IORESOURCE_MEM,
	},
};

static struct platform_device balloon3_nand = {
	.name		= "gen_nand",
	.num_resources	= ARRAY_SIZE(balloon3_nand_resource),
	.resource	= balloon3_nand_resource,
	.id		= -1,
	.dev		= {
		.platform_data = &balloon3_nand_pdata,
	}
};

static void __init balloon3_nand_init(void)
{
	platform_device_register(&balloon3_nand);
}
#else
static inline void balloon3_nand_init(void) {}
#endif

/******************************************************************************
 * Core power regulator
 ******************************************************************************/
#if defined(CONFIG_REGULATOR_MAX1586) || \
    defined(CONFIG_REGULATOR_MAX1586_MODULE)
static struct regulator_consumer_supply balloon3_max1587a_consumers[] = {
	REGULATOR_SUPPLY("vcc_core", NULL),
};

static struct regulator_init_data balloon3_max1587a_v3_info = {
	.constraints = {
		.name		= "vcc_core range",
		.min_uV		= 900000,
		.max_uV		= 1705000,
		.always_on	= 1,
		.valid_ops_mask	= REGULATOR_CHANGE_VOLTAGE,
	},
	.consumer_supplies	= balloon3_max1587a_consumers,
	.num_consumer_supplies	= ARRAY_SIZE(balloon3_max1587a_consumers),
};

static struct max1586_subdev_data balloon3_max1587a_subdevs[] = {
	{
		.name		= "vcc_core",
		.id		= MAX1586_V3,
		.platform_data	= &balloon3_max1587a_v3_info,
	}
};

static struct max1586_platform_data balloon3_max1587a_info = {
	.subdevs     = balloon3_max1587a_subdevs,
	.num_subdevs = ARRAY_SIZE(balloon3_max1587a_subdevs),
	.v3_gain     = MAX1586_GAIN_R24_3k32, /* 730..1550 mV */
};

static struct i2c_board_info __initdata balloon3_pi2c_board_info[] = {
	{
		I2C_BOARD_INFO("max1586", 0x14),
		.platform_data	= &balloon3_max1587a_info,
	},
};

static void __init balloon3_pmic_init(void)
{
	pxa27x_set_i2c_power_info(NULL);
	i2c_register_board_info(1, ARRAY_AND_SIZE(balloon3_pi2c_board_info));
}
#else
static inline void balloon3_pmic_init(void) {}
#endif

/******************************************************************************
 * Machine init
 ******************************************************************************/
static void __init balloon3_init(void)
{
	ARB_CNTRL = ARB_CORE_PARK | 0x234;

	pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_pin_config));

	pxa_set_ffuart_info(NULL);
	pxa_set_btuart_info(NULL);
	pxa_set_stuart_info(NULL);

	balloon3_i2c_init();
	balloon3_irda_init();
	balloon3_lcd_init();
	balloon3_leds_init();
	balloon3_mmc_init();
	balloon3_nand_init();
	balloon3_nor_init();
	balloon3_pmic_init();
	balloon3_ts_init();
	balloon3_udc_init();
	balloon3_uhc_init();
	balloon3_cf_init();
}

static struct map_desc balloon3_io_desc[] __initdata = {
	{	/* CPLD/FPGA */
		.virtual	= (unsigned long)BALLOON3_FPGA_VIRT,
		.pfn		= __phys_to_pfn(BALLOON3_FPGA_PHYS),
		.length		= BALLOON3_FPGA_LENGTH,
		.type		= MT_DEVICE,
	},
};

static void __init balloon3_map_io(void)
{
	pxa27x_map_io();
	iotable_init(balloon3_io_desc, ARRAY_SIZE(balloon3_io_desc));
}

MACHINE_START(BALLOON3, "Balloon3")
	/* Maintainer: Nick Bane. */
	.map_io		= balloon3_map_io,
	.nr_irqs	= BALLOON3_NR_IRQS,
	.init_irq	= balloon3_init_irq,
	.handle_irq	= pxa27x_handle_irq,
	.init_time	= pxa_timer_init,
	.init_machine	= balloon3_init,
	.atag_offset	= 0x100,
	.restart	= pxa_restart,
MACHINE_END