summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/board-n8x0.c
blob: 6b6fda65fb3b599f6b18704e3648020199aac493 (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
/*
 * linux/arch/arm/mach-omap2/board-n8x0.c
 *
 * Copyright (C) 2005-2009 Nokia Corporation
 * Author: Juha Yrjola <juha.yrjola@nokia.com>
 *
 * Modified from mach-omap2/board-generic.c
 *
 * 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/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/stddef.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/usb/musb.h>
#include <linux/mmc/host.h>
#include <linux/platform_data/spi-omap2-mcspi.h>
#include <linux/platform_data/mmc-omap.h>
#include <linux/mfd/menelaus.h>
#include <sound/tlv320aic3x.h>

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

#include "common.h"
#include "mmc.h"
#include "soc.h"
#include "common-board-devices.h"

#define TUSB6010_ASYNC_CS	1
#define TUSB6010_SYNC_CS	4
#define TUSB6010_GPIO_INT	58
#define TUSB6010_GPIO_ENABLE	0
#define TUSB6010_DMACHAN	0x3f

#define NOKIA_N810_WIMAX	(1 << 2)
#define NOKIA_N810		(1 << 1)
#define NOKIA_N800		(1 << 0)

static u32 board_caps;

#define board_is_n800()		(board_caps & NOKIA_N800)
#define board_is_n810()		(board_caps & NOKIA_N810)
#define board_is_n810_wimax()	(board_caps & NOKIA_N810_WIMAX)

static void board_check_revision(void)
{
	if (of_have_populated_dt()) {
		if (of_machine_is_compatible("nokia,n800"))
			board_caps = NOKIA_N800;
		else if (of_machine_is_compatible("nokia,n810"))
			board_caps = NOKIA_N810;
		else if (of_machine_is_compatible("nokia,n810-wimax"))
			board_caps = NOKIA_N810_WIMAX;
	}

	if (!board_caps)
		pr_err("Unknown board\n");
}

#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
/*
 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
 * provide then PGOOD signal to TUSB6010 which will release it from reset.
 */
static int tusb_set_power(int state)
{
	int i, retval = 0;

	if (state) {
		gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
		msleep(1);

		/* Wait until TUSB6010 pulls INT pin down */
		i = 100;
		while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
			msleep(1);
			i--;
		}

		if (!i) {
			printk(KERN_ERR "tusb: powerup failed\n");
			retval = -ENODEV;
		}
	} else {
		gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
		msleep(10);
	}

	return retval;
}

static struct musb_hdrc_config musb_config = {
	.multipoint	= 1,
	.dyn_fifo	= 1,
	.num_eps	= 16,
	.ram_bits	= 12,
};

static struct musb_hdrc_platform_data tusb_data = {
	.mode		= MUSB_OTG,
	.set_power	= tusb_set_power,
	.min_power	= 25,	/* x2 = 50 mA drawn from VBUS as peripheral */
	.power		= 100,	/* Max 100 mA VBUS for host mode */
	.config		= &musb_config,
};

static void __init n8x0_usb_init(void)
{
	int ret = 0;
	static char	announce[] __initdata = KERN_INFO "TUSB 6010\n";

	/* PM companion chip power control pin */
	ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
			       "TUSB6010 enable");
	if (ret != 0) {
		printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
		       TUSB6010_GPIO_ENABLE);
		return;
	}
	tusb_set_power(0);

	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
					TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
					TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
	if (ret != 0)
		goto err;

	printk(announce);

	return;

err:
	gpio_free(TUSB6010_GPIO_ENABLE);
}
#else

static void __init n8x0_usb_init(void) {}

#endif /*CONFIG_USB_MUSB_TUSB6010 */


static struct omap2_mcspi_device_config p54spi_mcspi_config = {
	.turbo_mode	= 0,
};

static struct spi_board_info n800_spi_board_info[] __initdata = {
	{
		.modalias	= "p54spi",
		.bus_num	= 2,
		.chip_select	= 0,
		.max_speed_hz   = 48000000,
		.controller_data = &p54spi_mcspi_config,
	},
};

#if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)

/*
 * On both N800 and N810, only the first of the two MMC controllers is in use.
 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
 * On N800, both slots are powered via Menelaus. On N810, only one of the
 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
 *
 * VMMC				slot 1 on both N800 and N810
 * VDCDC3_APE and VMCS2_APE	slot 2 on N800
 * GPIO23 and GPIO9		slot 2 EMMC on N810
 *
 */
#define N8X0_SLOT_SWITCH_GPIO	96
#define N810_EMMC_VSD_GPIO	23
#define N810_EMMC_VIO_GPIO	9

static int slot1_cover_open;
static int slot2_cover_open;
static struct device *mmc_device;

static int n8x0_mmc_switch_slot(struct device *dev, int slot)
{
#ifdef CONFIG_MMC_DEBUG
	dev_dbg(dev, "Choose slot %d\n", slot + 1);
#endif
	gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
	return 0;
}

static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
					int power_on, int vdd)
{
	int mV;

#ifdef CONFIG_MMC_DEBUG
	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
		power_on ? "on" : "off", vdd);
#endif
	if (slot == 0) {
		if (!power_on)
			return menelaus_set_vmmc(0);
		switch (1 << vdd) {
		case MMC_VDD_33_34:
		case MMC_VDD_32_33:
		case MMC_VDD_31_32:
			mV = 3100;
			break;
		case MMC_VDD_30_31:
			mV = 3000;
			break;
		case MMC_VDD_28_29:
			mV = 2800;
			break;
		case MMC_VDD_165_195:
			mV = 1850;
			break;
		default:
			BUG();
		}
		return menelaus_set_vmmc(mV);
	} else {
		if (!power_on)
			return menelaus_set_vdcdc(3, 0);
		switch (1 << vdd) {
		case MMC_VDD_33_34:
		case MMC_VDD_32_33:
			mV = 3300;
			break;
		case MMC_VDD_30_31:
		case MMC_VDD_29_30:
			mV = 3000;
			break;
		case MMC_VDD_28_29:
		case MMC_VDD_27_28:
			mV = 2800;
			break;
		case MMC_VDD_24_25:
		case MMC_VDD_23_24:
			mV = 2400;
			break;
		case MMC_VDD_22_23:
		case MMC_VDD_21_22:
			mV = 2200;
			break;
		case MMC_VDD_20_21:
			mV = 2000;
			break;
		case MMC_VDD_165_195:
			mV = 1800;
			break;
		default:
			BUG();
		}
		return menelaus_set_vdcdc(3, mV);
	}
	return 0;
}

static void n810_set_power_emmc(struct device *dev,
					 int power_on)
{
	dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");

	if (power_on) {
		gpio_set_value(N810_EMMC_VSD_GPIO, 1);
		msleep(1);
		gpio_set_value(N810_EMMC_VIO_GPIO, 1);
		msleep(1);
	} else {
		gpio_set_value(N810_EMMC_VIO_GPIO, 0);
		msleep(50);
		gpio_set_value(N810_EMMC_VSD_GPIO, 0);
		msleep(50);
	}
}

static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
			      int vdd)
{
	if (board_is_n800() || slot == 0)
		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);

	n810_set_power_emmc(dev, power_on);

	return 0;
}

static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
{
	int r;

	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
	BUG_ON(slot != 0 && slot != 1);
	slot++;
	switch (bus_mode) {
	case MMC_BUSMODE_OPENDRAIN:
		r = menelaus_set_mmc_opendrain(slot, 1);
		break;
	case MMC_BUSMODE_PUSHPULL:
		r = menelaus_set_mmc_opendrain(slot, 0);
		break;
	default:
		BUG();
	}
	if (r != 0 && printk_ratelimit())
		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
			slot);
	return r;
}

static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
{
	slot++;
	BUG_ON(slot != 1 && slot != 2);
	if (slot == 1)
		return slot1_cover_open;
	else
		return slot2_cover_open;
}

static void n8x0_mmc_callback(void *data, u8 card_mask)
{
	int bit, *openp, index;

	if (board_is_n800()) {
		bit = 1 << 1;
		openp = &slot2_cover_open;
		index = 1;
	} else {
		bit = 1;
		openp = &slot1_cover_open;
		index = 0;
	}

	if (card_mask & bit)
		*openp = 1;
	else
		*openp = 0;

#ifdef CONFIG_MMC_OMAP
	omap_mmc_notify_cover_event(mmc_device, index, *openp);
#else
	pr_warn("MMC: notify cover event not available\n");
#endif
}

static int n8x0_mmc_late_init(struct device *dev)
{
	int r, bit, *openp;
	int vs2sel;

	mmc_device = dev;

	r = menelaus_set_slot_sel(1);
	if (r < 0)
		return r;

	if (board_is_n800())
		vs2sel = 0;
	else
		vs2sel = 2;

	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
	if (r < 0)
		return r;

	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);

	r = menelaus_set_mmc_slot(1, 1, 0, 1);
	if (r < 0)
		return r;
	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
	if (r < 0)
		return r;

	r = menelaus_get_slot_pin_states();
	if (r < 0)
		return r;

	if (board_is_n800()) {
		bit = 1 << 1;
		openp = &slot2_cover_open;
	} else {
		bit = 1;
		openp = &slot1_cover_open;
		slot2_cover_open = 0;
	}

	/* All slot pin bits seem to be inversed until first switch change */
	if (r == 0xf || r == (0xf & ~bit))
		r = ~r;

	if (r & bit)
		*openp = 1;
	else
		*openp = 0;

	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);

	return r;
}

static void n8x0_mmc_shutdown(struct device *dev)
{
	int vs2sel;

	if (board_is_n800())
		vs2sel = 0;
	else
		vs2sel = 2;

	menelaus_set_mmc_slot(1, 0, 0, 0);
	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
}

static void n8x0_mmc_cleanup(struct device *dev)
{
	menelaus_unregister_mmc_callback();

	gpio_free(N8X0_SLOT_SWITCH_GPIO);

	if (board_is_n810()) {
		gpio_free(N810_EMMC_VSD_GPIO);
		gpio_free(N810_EMMC_VIO_GPIO);
	}
}

/*
 * MMC controller1 has two slots that are multiplexed via I2C.
 * MMC controller2 is not in use.
 */
static struct omap_mmc_platform_data mmc1_data = {
	.nr_slots			= 0,
	.switch_slot			= n8x0_mmc_switch_slot,
	.init				= n8x0_mmc_late_init,
	.cleanup			= n8x0_mmc_cleanup,
	.shutdown			= n8x0_mmc_shutdown,
	.max_freq			= 24000000,
	.slots[0] = {
		.wires			= 4,
		.set_power		= n8x0_mmc_set_power,
		.set_bus_mode		= n8x0_mmc_set_bus_mode,
		.get_cover_state	= n8x0_mmc_get_cover_state,
		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
						MMC_VDD_32_33   | MMC_VDD_33_34,
		.name			= "internal",
	},
	.slots[1] = {
		.set_power		= n8x0_mmc_set_power,
		.set_bus_mode		= n8x0_mmc_set_bus_mode,
		.get_cover_state	= n8x0_mmc_get_cover_state,
		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
						MMC_VDD_21_22 | MMC_VDD_22_23 |
						MMC_VDD_23_24 | MMC_VDD_24_25 |
						MMC_VDD_27_28 | MMC_VDD_28_29 |
						MMC_VDD_29_30 | MMC_VDD_30_31 |
						MMC_VDD_32_33 | MMC_VDD_33_34,
		.name			= "external",
	},
};

static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];

static struct gpio n810_emmc_gpios[] __initdata = {
	{ N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
	{ N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
};

static void __init n8x0_mmc_init(void)
{
	int err;

	if (board_is_n810()) {
		mmc1_data.slots[0].name = "external";

		/*
		 * Some Samsung Movinand chips do not like open-ended
		 * multi-block reads and fall to braind-dead state
		 * while doing so. Reducing the number of blocks in
		 * the transfer or delays in clock disable do not help
		 */
		mmc1_data.slots[1].name = "internal";
		mmc1_data.slots[1].ban_openended = 1;
	}

	err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
			       "MMC slot switch");
	if (err)
		return;

	if (board_is_n810()) {
		err = gpio_request_array(n810_emmc_gpios,
					 ARRAY_SIZE(n810_emmc_gpios));
		if (err) {
			gpio_free(N8X0_SLOT_SWITCH_GPIO);
			return;
		}
	}

	mmc1_data.nr_slots = 2;
	mmc_data[0] = &mmc1_data;
}
#else
static struct omap_mmc_platform_data mmc1_data;
void __init n8x0_mmc_init(void)
{
}
#endif	/* CONFIG_MMC_OMAP */

#ifdef CONFIG_MENELAUS

static int n8x0_auto_sleep_regulators(void)
{
	u32 val;
	int ret;

	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
		| EN_VC_SLEEP | EN_DC2_SLEEP;

	ret = menelaus_set_regulator_sleep(1, val);
	if (ret < 0) {
		pr_err("Could not set regulators to sleep on menelaus: %u\n",
		       ret);
		return ret;
	}
	return 0;
}

static int n8x0_auto_voltage_scale(void)
{
	int ret;

	ret = menelaus_set_vcore_hw(1400, 1050);
	if (ret < 0) {
		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
		return ret;
	}
	return 0;
}

static int n8x0_menelaus_late_init(struct device *dev)
{
	int ret;

	ret = n8x0_auto_voltage_scale();
	if (ret < 0)
		return ret;
	ret = n8x0_auto_sleep_regulators();
	if (ret < 0)
		return ret;
	return 0;
}

#else
static int n8x0_menelaus_late_init(struct device *dev)
{
	return 0;
}
#endif

struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
	.late_init = n8x0_menelaus_late_init,
};

struct aic3x_pdata n810_aic33_data __initdata = {
	.gpio_reset = 118,
};

static int __init n8x0_late_initcall(void)
{
	if (!board_caps)
		return -ENODEV;

	n8x0_mmc_init();
	n8x0_usb_init();

	return 0;
}
omap_late_initcall(n8x0_late_initcall);

/*
 * Legacy init pdata init for n8x0. Note that we want to follow the
 * I2C bus numbering starting at 0 for device tree like other omaps.
 */
void * __init n8x0_legacy_init(void)
{
	board_check_revision();
	spi_register_board_info(n800_spi_board_info,
				ARRAY_SIZE(n800_spi_board_info));
	return &mmc1_data;
}
OpenPOWER on IntegriCloud