1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-omap2/board-n8x0.c
4 *
5 * Copyright (C) 2005-2009 Nokia Corporation
6 * Author: Juha Yrjola <juha.yrjola@nokia.com>
7 *
8 * Modified from mach-omap2/board-generic.c
9 */
10
11#include <linux/clk.h>
12#include <linux/delay.h>
13#include <linux/gpio.h>
14#include <linux/init.h>
15#include <linux/io.h>
16#include <linux/irq.h>
17#include <linux/stddef.h>
18#include <linux/i2c.h>
19#include <linux/spi/spi.h>
20#include <linux/usb/musb.h>
21#include <linux/mmc/host.h>
22#include <linux/platform_data/spi-omap2-mcspi.h>
23#include <linux/platform_data/mmc-omap.h>
24#include <linux/mfd/menelaus.h>
25#include <sound/tlv320aic3x.h>
26
27#include <asm/mach/arch.h>
28#include <asm/mach-types.h>
29
30#include "common.h"
31#include "mmc.h"
32#include "soc.h"
33#include "common-board-devices.h"
34
35#define TUSB6010_ASYNC_CS	1
36#define TUSB6010_SYNC_CS	4
37#define TUSB6010_GPIO_INT	58
38#define TUSB6010_GPIO_ENABLE	0
39#define TUSB6010_DMACHAN	0x3f
40
41#define NOKIA_N810_WIMAX	(1 << 2)
42#define NOKIA_N810		(1 << 1)
43#define NOKIA_N800		(1 << 0)
44
45static u32 board_caps;
46
47#define board_is_n800()		(board_caps & NOKIA_N800)
48#define board_is_n810()		(board_caps & NOKIA_N810)
49#define board_is_n810_wimax()	(board_caps & NOKIA_N810_WIMAX)
50
51static void board_check_revision(void)
52{
53	if (of_machine_is_compatible("nokia,n800"))
54		board_caps = NOKIA_N800;
55	else if (of_machine_is_compatible("nokia,n810"))
56		board_caps = NOKIA_N810;
57	else if (of_machine_is_compatible("nokia,n810-wimax"))
58		board_caps = NOKIA_N810_WIMAX;
59
60	if (!board_caps)
61		pr_err("Unknown board\n");
62}
63
64#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
65/*
66 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
67 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
68 * provide then PGOOD signal to TUSB6010 which will release it from reset.
69 */
70static int tusb_set_power(int state)
71{
72	int i, retval = 0;
73
74	if (state) {
75		gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
76		msleep(1);
77
78		/* Wait until TUSB6010 pulls INT pin down */
79		i = 100;
80		while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
81			msleep(1);
82			i--;
83		}
84
85		if (!i) {
86			printk(KERN_ERR "tusb: powerup failed\n");
87			retval = -ENODEV;
88		}
89	} else {
90		gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
91		msleep(10);
92	}
93
94	return retval;
95}
96
97static struct musb_hdrc_config musb_config = {
98	.multipoint	= 1,
99	.dyn_fifo	= 1,
100	.num_eps	= 16,
101	.ram_bits	= 12,
102};
103
104static struct musb_hdrc_platform_data tusb_data = {
105	.mode		= MUSB_OTG,
106	.set_power	= tusb_set_power,
107	.min_power	= 25,	/* x2 = 50 mA drawn from VBUS as peripheral */
108	.power		= 100,	/* Max 100 mA VBUS for host mode */
109	.config		= &musb_config,
110};
111
112static void __init n8x0_usb_init(void)
113{
114	int ret = 0;
115	static const char announce[] __initconst = KERN_INFO "TUSB 6010\n";
116
117	/* PM companion chip power control pin */
118	ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
119			       "TUSB6010 enable");
120	if (ret != 0) {
121		printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
122		       TUSB6010_GPIO_ENABLE);
123		return;
124	}
125	tusb_set_power(0);
126
127	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
128					TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
129					TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
130	if (ret != 0)
131		goto err;
132
133	printk(announce);
134
135	return;
136
137err:
138	gpio_free(TUSB6010_GPIO_ENABLE);
139}
140#else
141
142static void __init n8x0_usb_init(void) {}
143
144#endif /*CONFIG_USB_MUSB_TUSB6010 */
145
146
147static struct omap2_mcspi_device_config p54spi_mcspi_config = {
148	.turbo_mode	= 0,
149};
150
151static struct spi_board_info n800_spi_board_info[] __initdata = {
152	{
153		.modalias	= "p54spi",
154		.bus_num	= 2,
155		.chip_select	= 0,
156		.max_speed_hz   = 48000000,
157		.controller_data = &p54spi_mcspi_config,
158	},
159};
160
161#if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
162
163/*
164 * On both N800 and N810, only the first of the two MMC controllers is in use.
165 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
166 * On N800, both slots are powered via Menelaus. On N810, only one of the
167 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
168 *
169 * VMMC				slot 1 on both N800 and N810
170 * VDCDC3_APE and VMCS2_APE	slot 2 on N800
171 * GPIO23 and GPIO9		slot 2 EMMC on N810
172 *
173 */
174#define N8X0_SLOT_SWITCH_GPIO	96
175#define N810_EMMC_VSD_GPIO	23
176#define N810_EMMC_VIO_GPIO	9
177
178static int slot1_cover_open;
179static int slot2_cover_open;
180static struct device *mmc_device;
181
182static int n8x0_mmc_switch_slot(struct device *dev, int slot)
183{
184#ifdef CONFIG_MMC_DEBUG
185	dev_dbg(dev, "Choose slot %d\n", slot + 1);
186#endif
187	gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
188	return 0;
189}
190
191static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
192					int power_on, int vdd)
193{
194	int mV;
195
196#ifdef CONFIG_MMC_DEBUG
197	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
198		power_on ? "on" : "off", vdd);
199#endif
200	if (slot == 0) {
201		if (!power_on)
202			return menelaus_set_vmmc(0);
203		switch (1 << vdd) {
204		case MMC_VDD_33_34:
205		case MMC_VDD_32_33:
206		case MMC_VDD_31_32:
207			mV = 3100;
208			break;
209		case MMC_VDD_30_31:
210			mV = 3000;
211			break;
212		case MMC_VDD_28_29:
213			mV = 2800;
214			break;
215		case MMC_VDD_165_195:
216			mV = 1850;
217			break;
218		default:
219			BUG();
220		}
221		return menelaus_set_vmmc(mV);
222	} else {
223		if (!power_on)
224			return menelaus_set_vdcdc(3, 0);
225		switch (1 << vdd) {
226		case MMC_VDD_33_34:
227		case MMC_VDD_32_33:
228			mV = 3300;
229			break;
230		case MMC_VDD_30_31:
231		case MMC_VDD_29_30:
232			mV = 3000;
233			break;
234		case MMC_VDD_28_29:
235		case MMC_VDD_27_28:
236			mV = 2800;
237			break;
238		case MMC_VDD_24_25:
239		case MMC_VDD_23_24:
240			mV = 2400;
241			break;
242		case MMC_VDD_22_23:
243		case MMC_VDD_21_22:
244			mV = 2200;
245			break;
246		case MMC_VDD_20_21:
247			mV = 2000;
248			break;
249		case MMC_VDD_165_195:
250			mV = 1800;
251			break;
252		default:
253			BUG();
254		}
255		return menelaus_set_vdcdc(3, mV);
256	}
257	return 0;
258}
259
260static void n810_set_power_emmc(struct device *dev,
261					 int power_on)
262{
263	dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
264
265	if (power_on) {
266		gpio_set_value(N810_EMMC_VSD_GPIO, 1);
267		msleep(1);
268		gpio_set_value(N810_EMMC_VIO_GPIO, 1);
269		msleep(1);
270	} else {
271		gpio_set_value(N810_EMMC_VIO_GPIO, 0);
272		msleep(50);
273		gpio_set_value(N810_EMMC_VSD_GPIO, 0);
274		msleep(50);
275	}
276}
277
278static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
279			      int vdd)
280{
281	if (board_is_n800() || slot == 0)
282		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
283
284	n810_set_power_emmc(dev, power_on);
285
286	return 0;
287}
288
289static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
290{
291	int r;
292
293	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
294		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
295	BUG_ON(slot != 0 && slot != 1);
296	slot++;
297	switch (bus_mode) {
298	case MMC_BUSMODE_OPENDRAIN:
299		r = menelaus_set_mmc_opendrain(slot, 1);
300		break;
301	case MMC_BUSMODE_PUSHPULL:
302		r = menelaus_set_mmc_opendrain(slot, 0);
303		break;
304	default:
305		BUG();
306	}
307	if (r != 0 && printk_ratelimit())
308		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
309			slot);
310	return r;
311}
312
313static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
314{
315	slot++;
316	BUG_ON(slot != 1 && slot != 2);
317	if (slot == 1)
318		return slot1_cover_open;
319	else
320		return slot2_cover_open;
321}
322
323static void n8x0_mmc_callback(void *data, u8 card_mask)
324{
325#ifdef CONFIG_MMC_OMAP
326	int bit, *openp, index;
327
328	if (board_is_n800()) {
329		bit = 1 << 1;
330		openp = &slot2_cover_open;
331		index = 1;
332	} else {
333		bit = 1;
334		openp = &slot1_cover_open;
335		index = 0;
336	}
337
338	if (card_mask & bit)
339		*openp = 1;
340	else
341		*openp = 0;
342
343	omap_mmc_notify_cover_event(mmc_device, index, *openp);
344#else
345	pr_warn("MMC: notify cover event not available\n");
346#endif
347}
348
349static int n8x0_mmc_late_init(struct device *dev)
350{
351	int r, bit, *openp;
352	int vs2sel;
353
354	mmc_device = dev;
355
356	r = menelaus_set_slot_sel(1);
357	if (r < 0)
358		return r;
359
360	if (board_is_n800())
361		vs2sel = 0;
362	else
363		vs2sel = 2;
364
365	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
366	if (r < 0)
367		return r;
368
369	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
370	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
371
372	r = menelaus_set_mmc_slot(1, 1, 0, 1);
373	if (r < 0)
374		return r;
375	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
376	if (r < 0)
377		return r;
378
379	r = menelaus_get_slot_pin_states();
380	if (r < 0)
381		return r;
382
383	if (board_is_n800()) {
384		bit = 1 << 1;
385		openp = &slot2_cover_open;
386	} else {
387		bit = 1;
388		openp = &slot1_cover_open;
389		slot2_cover_open = 0;
390	}
391
392	/* All slot pin bits seem to be inversed until first switch change */
393	if (r == 0xf || r == (0xf & ~bit))
394		r = ~r;
395
396	if (r & bit)
397		*openp = 1;
398	else
399		*openp = 0;
400
401	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
402
403	return r;
404}
405
406static void n8x0_mmc_shutdown(struct device *dev)
407{
408	int vs2sel;
409
410	if (board_is_n800())
411		vs2sel = 0;
412	else
413		vs2sel = 2;
414
415	menelaus_set_mmc_slot(1, 0, 0, 0);
416	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
417}
418
419static void n8x0_mmc_cleanup(struct device *dev)
420{
421	menelaus_unregister_mmc_callback();
422
423	gpio_free(N8X0_SLOT_SWITCH_GPIO);
424
425	if (board_is_n810()) {
426		gpio_free(N810_EMMC_VSD_GPIO);
427		gpio_free(N810_EMMC_VIO_GPIO);
428	}
429}
430
431/*
432 * MMC controller1 has two slots that are multiplexed via I2C.
433 * MMC controller2 is not in use.
434 */
435static struct omap_mmc_platform_data mmc1_data = {
436	.nr_slots			= 0,
437	.switch_slot			= n8x0_mmc_switch_slot,
438	.init				= n8x0_mmc_late_init,
439	.cleanup			= n8x0_mmc_cleanup,
440	.shutdown			= n8x0_mmc_shutdown,
441	.max_freq			= 24000000,
442	.slots[0] = {
443		.wires			= 4,
444		.set_power		= n8x0_mmc_set_power,
445		.set_bus_mode		= n8x0_mmc_set_bus_mode,
446		.get_cover_state	= n8x0_mmc_get_cover_state,
447		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
448						MMC_VDD_32_33   | MMC_VDD_33_34,
449		.name			= "internal",
450	},
451	.slots[1] = {
452		.set_power		= n8x0_mmc_set_power,
453		.set_bus_mode		= n8x0_mmc_set_bus_mode,
454		.get_cover_state	= n8x0_mmc_get_cover_state,
455		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
456						MMC_VDD_21_22 | MMC_VDD_22_23 |
457						MMC_VDD_23_24 | MMC_VDD_24_25 |
458						MMC_VDD_27_28 | MMC_VDD_28_29 |
459						MMC_VDD_29_30 | MMC_VDD_30_31 |
460						MMC_VDD_32_33 | MMC_VDD_33_34,
461		.name			= "external",
462	},
463};
464
465static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
466
467static struct gpio n810_emmc_gpios[] __initdata = {
468	{ N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
469	{ N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
470};
471
472static void __init n8x0_mmc_init(void)
473{
474	int err;
475
476	if (board_is_n810()) {
477		mmc1_data.slots[0].name = "external";
478
479		/*
480		 * Some Samsung Movinand chips do not like open-ended
481		 * multi-block reads and fall to braind-dead state
482		 * while doing so. Reducing the number of blocks in
483		 * the transfer or delays in clock disable do not help
484		 */
485		mmc1_data.slots[1].name = "internal";
486		mmc1_data.slots[1].ban_openended = 1;
487	}
488
489	err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
490			       "MMC slot switch");
491	if (err)
492		return;
493
494	if (board_is_n810()) {
495		err = gpio_request_array(n810_emmc_gpios,
496					 ARRAY_SIZE(n810_emmc_gpios));
497		if (err) {
498			gpio_free(N8X0_SLOT_SWITCH_GPIO);
499			return;
500		}
501	}
502
503	mmc1_data.nr_slots = 2;
504	mmc_data[0] = &mmc1_data;
505}
506#else
507static struct omap_mmc_platform_data mmc1_data;
508void __init n8x0_mmc_init(void)
509{
510}
511#endif	/* CONFIG_MMC_OMAP */
512
513#ifdef CONFIG_MENELAUS
514
515static int n8x0_auto_sleep_regulators(void)
516{
517	u32 val;
518	int ret;
519
520	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
521		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
522		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
523		| EN_VC_SLEEP | EN_DC2_SLEEP;
524
525	ret = menelaus_set_regulator_sleep(1, val);
526	if (ret < 0) {
527		pr_err("Could not set regulators to sleep on menelaus: %u\n",
528		       ret);
529		return ret;
530	}
531	return 0;
532}
533
534static int n8x0_auto_voltage_scale(void)
535{
536	int ret;
537
538	ret = menelaus_set_vcore_hw(1400, 1050);
539	if (ret < 0) {
540		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
541		return ret;
542	}
543	return 0;
544}
545
546static int n8x0_menelaus_late_init(struct device *dev)
547{
548	int ret;
549
550	ret = n8x0_auto_voltage_scale();
551	if (ret < 0)
552		return ret;
553	ret = n8x0_auto_sleep_regulators();
554	if (ret < 0)
555		return ret;
556	return 0;
557}
558
559#else
560static int n8x0_menelaus_late_init(struct device *dev)
561{
562	return 0;
563}
564#endif
565
566struct menelaus_platform_data n8x0_menelaus_platform_data = {
567	.late_init = n8x0_menelaus_late_init,
568};
569
570struct aic3x_pdata n810_aic33_data = {
571	.gpio_reset = 118,
572};
573
574static int __init n8x0_late_initcall(void)
575{
576	if (!board_caps)
577		return -ENODEV;
578
579	n8x0_mmc_init();
580	n8x0_usb_init();
581
582	return 0;
583}
584omap_late_initcall(n8x0_late_initcall);
585
586/*
587 * Legacy init pdata init for n8x0. Note that we want to follow the
588 * I2C bus numbering starting at 0 for device tree like other omaps.
589 */
590void * __init n8x0_legacy_init(void)
591{
592	board_check_revision();
593	spi_register_board_info(n800_spi_board_info,
594				ARRAY_SIZE(n800_spi_board_info));
595	return &mmc1_data;
596}
597