1/*
2 * linux/arch/arm/mach-omap2/board-n8x0.c
3 *
4 * Copyright (C) 2005-2009 Nokia Corporation
5 * Author: Juha Yrjola <juha.yrjola@nokia.com>
6 *
7 * Modified from mach-omap2/board-generic.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/clk.h>
15#include <linux/delay.h>
16#include <linux/gpio.h>
17#include <linux/init.h>
18#include <linux/io.h>
19#include <linux/irq.h>
20#include <linux/stddef.h>
21#include <linux/i2c.h>
22#include <linux/spi/spi.h>
23#include <linux/usb/musb.h>
24#include <linux/mmc/host.h>
25#include <linux/platform_data/spi-omap2-mcspi.h>
26#include <linux/platform_data/mmc-omap.h>
27#include <linux/mfd/menelaus.h>
28#include <sound/tlv320aic3x.h>
29
30#include <asm/mach/arch.h>
31#include <asm/mach-types.h>
32
33#include "common.h"
34#include "mmc.h"
35#include "soc.h"
36#include "common-board-devices.h"
37
38#define TUSB6010_ASYNC_CS	1
39#define TUSB6010_SYNC_CS	4
40#define TUSB6010_GPIO_INT	58
41#define TUSB6010_GPIO_ENABLE	0
42#define TUSB6010_DMACHAN	0x3f
43
44#define NOKIA_N810_WIMAX	(1 << 2)
45#define NOKIA_N810		(1 << 1)
46#define NOKIA_N800		(1 << 0)
47
48static u32 board_caps;
49
50#define board_is_n800()		(board_caps & NOKIA_N800)
51#define board_is_n810()		(board_caps & NOKIA_N810)
52#define board_is_n810_wimax()	(board_caps & NOKIA_N810_WIMAX)
53
54static void board_check_revision(void)
55{
56	if (of_have_populated_dt()) {
57		if (of_machine_is_compatible("nokia,n800"))
58			board_caps = NOKIA_N800;
59		else if (of_machine_is_compatible("nokia,n810"))
60			board_caps = NOKIA_N810;
61		else if (of_machine_is_compatible("nokia,n810-wimax"))
62			board_caps = NOKIA_N810_WIMAX;
63	}
64
65	if (!board_caps)
66		pr_err("Unknown board\n");
67}
68
69#if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
70/*
71 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
72 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
73 * provide then PGOOD signal to TUSB6010 which will release it from reset.
74 */
75static int tusb_set_power(int state)
76{
77	int i, retval = 0;
78
79	if (state) {
80		gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
81		msleep(1);
82
83		/* Wait until TUSB6010 pulls INT pin down */
84		i = 100;
85		while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
86			msleep(1);
87			i--;
88		}
89
90		if (!i) {
91			printk(KERN_ERR "tusb: powerup failed\n");
92			retval = -ENODEV;
93		}
94	} else {
95		gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
96		msleep(10);
97	}
98
99	return retval;
100}
101
102static struct musb_hdrc_config musb_config = {
103	.multipoint	= 1,
104	.dyn_fifo	= 1,
105	.num_eps	= 16,
106	.ram_bits	= 12,
107};
108
109static struct musb_hdrc_platform_data tusb_data = {
110	.mode		= MUSB_OTG,
111	.set_power	= tusb_set_power,
112	.min_power	= 25,	/* x2 = 50 mA drawn from VBUS as peripheral */
113	.power		= 100,	/* Max 100 mA VBUS for host mode */
114	.config		= &musb_config,
115};
116
117static void __init n8x0_usb_init(void)
118{
119	int ret = 0;
120	static char	announce[] __initdata = KERN_INFO "TUSB 6010\n";
121
122	/* PM companion chip power control pin */
123	ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
124			       "TUSB6010 enable");
125	if (ret != 0) {
126		printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
127		       TUSB6010_GPIO_ENABLE);
128		return;
129	}
130	tusb_set_power(0);
131
132	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
133					TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
134					TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
135	if (ret != 0)
136		goto err;
137
138	printk(announce);
139
140	return;
141
142err:
143	gpio_free(TUSB6010_GPIO_ENABLE);
144}
145#else
146
147static void __init n8x0_usb_init(void) {}
148
149#endif /*CONFIG_USB_MUSB_TUSB6010 */
150
151
152static struct omap2_mcspi_device_config p54spi_mcspi_config = {
153	.turbo_mode	= 0,
154};
155
156static struct spi_board_info n800_spi_board_info[] __initdata = {
157	{
158		.modalias	= "p54spi",
159		.bus_num	= 2,
160		.chip_select	= 0,
161		.max_speed_hz   = 48000000,
162		.controller_data = &p54spi_mcspi_config,
163	},
164};
165
166#if defined(CONFIG_MENELAUS) &&						\
167	(defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE))
168
169/*
170 * On both N800 and N810, only the first of the two MMC controllers is in use.
171 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
172 * On N800, both slots are powered via Menelaus. On N810, only one of the
173 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
174 *
175 * VMMC				slot 1 on both N800 and N810
176 * VDCDC3_APE and VMCS2_APE	slot 2 on N800
177 * GPIO23 and GPIO9		slot 2 EMMC on N810
178 *
179 */
180#define N8X0_SLOT_SWITCH_GPIO	96
181#define N810_EMMC_VSD_GPIO	23
182#define N810_EMMC_VIO_GPIO	9
183
184static int slot1_cover_open;
185static int slot2_cover_open;
186static struct device *mmc_device;
187
188static int n8x0_mmc_switch_slot(struct device *dev, int slot)
189{
190#ifdef CONFIG_MMC_DEBUG
191	dev_dbg(dev, "Choose slot %d\n", slot + 1);
192#endif
193	gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
194	return 0;
195}
196
197static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
198					int power_on, int vdd)
199{
200	int mV;
201
202#ifdef CONFIG_MMC_DEBUG
203	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
204		power_on ? "on" : "off", vdd);
205#endif
206	if (slot == 0) {
207		if (!power_on)
208			return menelaus_set_vmmc(0);
209		switch (1 << vdd) {
210		case MMC_VDD_33_34:
211		case MMC_VDD_32_33:
212		case MMC_VDD_31_32:
213			mV = 3100;
214			break;
215		case MMC_VDD_30_31:
216			mV = 3000;
217			break;
218		case MMC_VDD_28_29:
219			mV = 2800;
220			break;
221		case MMC_VDD_165_195:
222			mV = 1850;
223			break;
224		default:
225			BUG();
226		}
227		return menelaus_set_vmmc(mV);
228	} else {
229		if (!power_on)
230			return menelaus_set_vdcdc(3, 0);
231		switch (1 << vdd) {
232		case MMC_VDD_33_34:
233		case MMC_VDD_32_33:
234			mV = 3300;
235			break;
236		case MMC_VDD_30_31:
237		case MMC_VDD_29_30:
238			mV = 3000;
239			break;
240		case MMC_VDD_28_29:
241		case MMC_VDD_27_28:
242			mV = 2800;
243			break;
244		case MMC_VDD_24_25:
245		case MMC_VDD_23_24:
246			mV = 2400;
247			break;
248		case MMC_VDD_22_23:
249		case MMC_VDD_21_22:
250			mV = 2200;
251			break;
252		case MMC_VDD_20_21:
253			mV = 2000;
254			break;
255		case MMC_VDD_165_195:
256			mV = 1800;
257			break;
258		default:
259			BUG();
260		}
261		return menelaus_set_vdcdc(3, mV);
262	}
263	return 0;
264}
265
266static void n810_set_power_emmc(struct device *dev,
267					 int power_on)
268{
269	dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
270
271	if (power_on) {
272		gpio_set_value(N810_EMMC_VSD_GPIO, 1);
273		msleep(1);
274		gpio_set_value(N810_EMMC_VIO_GPIO, 1);
275		msleep(1);
276	} else {
277		gpio_set_value(N810_EMMC_VIO_GPIO, 0);
278		msleep(50);
279		gpio_set_value(N810_EMMC_VSD_GPIO, 0);
280		msleep(50);
281	}
282}
283
284static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
285			      int vdd)
286{
287	if (board_is_n800() || slot == 0)
288		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
289
290	n810_set_power_emmc(dev, power_on);
291
292	return 0;
293}
294
295static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
296{
297	int r;
298
299	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
300		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
301	BUG_ON(slot != 0 && slot != 1);
302	slot++;
303	switch (bus_mode) {
304	case MMC_BUSMODE_OPENDRAIN:
305		r = menelaus_set_mmc_opendrain(slot, 1);
306		break;
307	case MMC_BUSMODE_PUSHPULL:
308		r = menelaus_set_mmc_opendrain(slot, 0);
309		break;
310	default:
311		BUG();
312	}
313	if (r != 0 && printk_ratelimit())
314		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
315			slot);
316	return r;
317}
318
319static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
320{
321	slot++;
322	BUG_ON(slot != 1 && slot != 2);
323	if (slot == 1)
324		return slot1_cover_open;
325	else
326		return slot2_cover_open;
327}
328
329static void n8x0_mmc_callback(void *data, u8 card_mask)
330{
331	int bit, *openp, index;
332
333	if (board_is_n800()) {
334		bit = 1 << 1;
335		openp = &slot2_cover_open;
336		index = 1;
337	} else {
338		bit = 1;
339		openp = &slot1_cover_open;
340		index = 0;
341	}
342
343	if (card_mask & bit)
344		*openp = 1;
345	else
346		*openp = 0;
347
348#ifdef CONFIG_MMC_OMAP
349	omap_mmc_notify_cover_event(mmc_device, index, *openp);
350#else
351	pr_warn("MMC: notify cover event not available\n");
352#endif
353}
354
355static int n8x0_mmc_late_init(struct device *dev)
356{
357	int r, bit, *openp;
358	int vs2sel;
359
360	mmc_device = dev;
361
362	r = menelaus_set_slot_sel(1);
363	if (r < 0)
364		return r;
365
366	if (board_is_n800())
367		vs2sel = 0;
368	else
369		vs2sel = 2;
370
371	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
372	if (r < 0)
373		return r;
374
375	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
376	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
377
378	r = menelaus_set_mmc_slot(1, 1, 0, 1);
379	if (r < 0)
380		return r;
381	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
382	if (r < 0)
383		return r;
384
385	r = menelaus_get_slot_pin_states();
386	if (r < 0)
387		return r;
388
389	if (board_is_n800()) {
390		bit = 1 << 1;
391		openp = &slot2_cover_open;
392	} else {
393		bit = 1;
394		openp = &slot1_cover_open;
395		slot2_cover_open = 0;
396	}
397
398	/* All slot pin bits seem to be inversed until first switch change */
399	if (r == 0xf || r == (0xf & ~bit))
400		r = ~r;
401
402	if (r & bit)
403		*openp = 1;
404	else
405		*openp = 0;
406
407	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
408
409	return r;
410}
411
412static void n8x0_mmc_shutdown(struct device *dev)
413{
414	int vs2sel;
415
416	if (board_is_n800())
417		vs2sel = 0;
418	else
419		vs2sel = 2;
420
421	menelaus_set_mmc_slot(1, 0, 0, 0);
422	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
423}
424
425static void n8x0_mmc_cleanup(struct device *dev)
426{
427	menelaus_unregister_mmc_callback();
428
429	gpio_free(N8X0_SLOT_SWITCH_GPIO);
430
431	if (board_is_n810()) {
432		gpio_free(N810_EMMC_VSD_GPIO);
433		gpio_free(N810_EMMC_VIO_GPIO);
434	}
435}
436
437/*
438 * MMC controller1 has two slots that are multiplexed via I2C.
439 * MMC controller2 is not in use.
440 */
441static struct omap_mmc_platform_data mmc1_data = {
442	.nr_slots			= 0,
443	.switch_slot			= n8x0_mmc_switch_slot,
444	.init				= n8x0_mmc_late_init,
445	.cleanup			= n8x0_mmc_cleanup,
446	.shutdown			= n8x0_mmc_shutdown,
447	.max_freq			= 24000000,
448	.slots[0] = {
449		.wires			= 4,
450		.set_power		= n8x0_mmc_set_power,
451		.set_bus_mode		= n8x0_mmc_set_bus_mode,
452		.get_cover_state	= n8x0_mmc_get_cover_state,
453		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
454						MMC_VDD_32_33   | MMC_VDD_33_34,
455		.name			= "internal",
456	},
457	.slots[1] = {
458		.set_power		= n8x0_mmc_set_power,
459		.set_bus_mode		= n8x0_mmc_set_bus_mode,
460		.get_cover_state	= n8x0_mmc_get_cover_state,
461		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
462						MMC_VDD_21_22 | MMC_VDD_22_23 |
463						MMC_VDD_23_24 | MMC_VDD_24_25 |
464						MMC_VDD_27_28 | MMC_VDD_28_29 |
465						MMC_VDD_29_30 | MMC_VDD_30_31 |
466						MMC_VDD_32_33 | MMC_VDD_33_34,
467		.name			= "external",
468	},
469};
470
471static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
472
473static struct gpio n810_emmc_gpios[] __initdata = {
474	{ N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
475	{ N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
476};
477
478static void __init n8x0_mmc_init(void)
479{
480	int err;
481
482	if (board_is_n810()) {
483		mmc1_data.slots[0].name = "external";
484
485		/*
486		 * Some Samsung Movinand chips do not like open-ended
487		 * multi-block reads and fall to braind-dead state
488		 * while doing so. Reducing the number of blocks in
489		 * the transfer or delays in clock disable do not help
490		 */
491		mmc1_data.slots[1].name = "internal";
492		mmc1_data.slots[1].ban_openended = 1;
493	}
494
495	err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
496			       "MMC slot switch");
497	if (err)
498		return;
499
500	if (board_is_n810()) {
501		err = gpio_request_array(n810_emmc_gpios,
502					 ARRAY_SIZE(n810_emmc_gpios));
503		if (err) {
504			gpio_free(N8X0_SLOT_SWITCH_GPIO);
505			return;
506		}
507	}
508
509	mmc1_data.nr_slots = 2;
510	mmc_data[0] = &mmc1_data;
511}
512#else
513static struct omap_mmc_platform_data mmc1_data;
514void __init n8x0_mmc_init(void)
515{
516}
517#endif	/* CONFIG_MMC_OMAP */
518
519#ifdef CONFIG_MENELAUS
520
521static int n8x0_auto_sleep_regulators(void)
522{
523	u32 val;
524	int ret;
525
526	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
527		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
528		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
529		| EN_VC_SLEEP | EN_DC2_SLEEP;
530
531	ret = menelaus_set_regulator_sleep(1, val);
532	if (ret < 0) {
533		pr_err("Could not set regulators to sleep on menelaus: %u\n",
534		       ret);
535		return ret;
536	}
537	return 0;
538}
539
540static int n8x0_auto_voltage_scale(void)
541{
542	int ret;
543
544	ret = menelaus_set_vcore_hw(1400, 1050);
545	if (ret < 0) {
546		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
547		return ret;
548	}
549	return 0;
550}
551
552static int n8x0_menelaus_late_init(struct device *dev)
553{
554	int ret;
555
556	ret = n8x0_auto_voltage_scale();
557	if (ret < 0)
558		return ret;
559	ret = n8x0_auto_sleep_regulators();
560	if (ret < 0)
561		return ret;
562	return 0;
563}
564
565#else
566static int n8x0_menelaus_late_init(struct device *dev)
567{
568	return 0;
569}
570#endif
571
572struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
573	.late_init = n8x0_menelaus_late_init,
574};
575
576struct aic3x_pdata n810_aic33_data __initdata = {
577	.gpio_reset = 118,
578};
579
580static int __init n8x0_late_initcall(void)
581{
582	if (!board_caps)
583		return -ENODEV;
584
585	n8x0_mmc_init();
586	n8x0_usb_init();
587
588	return 0;
589}
590omap_late_initcall(n8x0_late_initcall);
591
592/*
593 * Legacy init pdata init for n8x0. Note that we want to follow the
594 * I2C bus numbering starting at 0 for device tree like other omaps.
595 */
596void * __init n8x0_legacy_init(void)
597{
598	board_check_revision();
599	spi_register_board_info(n800_spi_board_info,
600				ARRAY_SIZE(n800_spi_board_info));
601	return &mmc1_data;
602}
603