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/machine.h>
14#include <linux/gpio/consumer.h>
15#include <linux/init.h>
16#include <linux/io.h>
17#include <linux/irq.h>
18#include <linux/stddef.h>
19#include <linux/i2c.h>
20#include <linux/spi/spi.h>
21#include <linux/usb/musb.h>
22#include <linux/mmc/host.h>
23#include <linux/platform_data/spi-omap2-mcspi.h>
24#include <linux/platform_data/mmc-omap.h>
25#include <linux/mfd/menelaus.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 "usb-tusb6010.h"
33#include "soc.h"
34#include "common-board-devices.h"
35
36#define TUSB6010_ASYNC_CS	1
37#define TUSB6010_SYNC_CS	4
38#define TUSB6010_DMACHAN	0x3f
39
40#define NOKIA_N810_WIMAX	(1 << 2)
41#define NOKIA_N810		(1 << 1)
42#define NOKIA_N800		(1 << 0)
43
44static u32 board_caps;
45
46#define board_is_n800()		(board_caps & NOKIA_N800)
47#define board_is_n810()		(board_caps & NOKIA_N810)
48#define board_is_n810_wimax()	(board_caps & NOKIA_N810_WIMAX)
49
50static void board_check_revision(void)
51{
52	if (of_machine_is_compatible("nokia,n800"))
53		board_caps = NOKIA_N800;
54	else if (of_machine_is_compatible("nokia,n810"))
55		board_caps = NOKIA_N810;
56	else if (of_machine_is_compatible("nokia,n810-wimax"))
57		board_caps = NOKIA_N810_WIMAX;
58
59	if (!board_caps)
60		pr_err("Unknown board\n");
61}
62
63#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
64
65static struct musb_hdrc_config musb_config = {
66	.multipoint	= 1,
67	.dyn_fifo	= 1,
68	.num_eps	= 16,
69	.ram_bits	= 12,
70};
71
72static struct musb_hdrc_platform_data tusb_data = {
73	.mode		= MUSB_OTG,
74	.min_power	= 25,	/* x2 = 50 mA drawn from VBUS as peripheral */
75	.power		= 100,	/* Max 100 mA VBUS for host mode */
76	.config		= &musb_config,
77};
78
79static struct gpiod_lookup_table tusb_gpio_table = {
80	.dev_id = "musb-tusb",
81	.table = {
82		GPIO_LOOKUP("gpio-0-31", 0, "enable", GPIO_ACTIVE_HIGH),
83		GPIO_LOOKUP("gpio-32-63", 26, "int", GPIO_ACTIVE_HIGH),
84		{ }
85	},
86};
87
88static void __init n8x0_usb_init(void)
89{
90	int ret = 0;
91
92	gpiod_add_lookup_table(&tusb_gpio_table);
93	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
94				       TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
95				       TUSB6010_DMACHAN);
96	if (ret != 0)
97		return;
98
99	pr_info("TUSB 6010\n");
100
101	return;
102}
103#else
104
105static void __init n8x0_usb_init(void) {}
106
107#endif /*CONFIG_USB_MUSB_TUSB6010 */
108
109
110static struct omap2_mcspi_device_config p54spi_mcspi_config = {
111	.turbo_mode	= 0,
112};
113
114static struct spi_board_info n800_spi_board_info[] __initdata = {
115	{
116		.modalias	= "p54spi",
117		.bus_num	= 2,
118		.chip_select	= 0,
119		.max_speed_hz   = 48000000,
120		.controller_data = &p54spi_mcspi_config,
121	},
122};
123
124#if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
125
126/*
127 * On both N800 and N810, only the first of the two MMC controllers is in use.
128 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
129 * On N800, both slots are powered via Menelaus. On N810, only one of the
130 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
131 *
132 * VMMC				slot 1 on both N800 and N810
133 * VDCDC3_APE and VMCS2_APE	slot 2 on N800
134 * GPIO23 and GPIO9		slot 2 EMMC on N810
135 *
136 */
137static int slot1_cover_open;
138static int slot2_cover_open;
139static struct device *mmc_device;
140
141static struct gpiod_lookup_table nokia800_mmc_gpio_table = {
142	.dev_id = "mmci-omap.0",
143	.table = {
144		/* Slot switch, GPIO 96 */
145		GPIO_LOOKUP("gpio-96-127", 0, "switch", GPIO_ACTIVE_HIGH),
146		{ }
147	},
148};
149
150static struct gpiod_lookup_table nokia810_mmc_gpio_table = {
151	.dev_id = "mmci-omap.0",
152	.table = {
153		/* Slot switch, GPIO 96 */
154		GPIO_LOOKUP("gpio-96-127", 0, "switch", GPIO_ACTIVE_HIGH),
155		/* Slot index 1, VSD power, GPIO 23 */
156		GPIO_LOOKUP_IDX("gpio-0-31", 23, "vsd", 1, GPIO_ACTIVE_HIGH),
157		/* Slot index 1, VIO power, GPIO 9 */
158		GPIO_LOOKUP_IDX("gpio-0-31", 9, "vio", 1, GPIO_ACTIVE_HIGH),
159		{ }
160	},
161};
162
163static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
164					int power_on, int vdd)
165{
166	int mV;
167
168#ifdef CONFIG_MMC_DEBUG
169	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
170		power_on ? "on" : "off", vdd);
171#endif
172	if (slot == 0) {
173		if (!power_on)
174			return menelaus_set_vmmc(0);
175		switch (1 << vdd) {
176		case MMC_VDD_33_34:
177		case MMC_VDD_32_33:
178		case MMC_VDD_31_32:
179			mV = 3100;
180			break;
181		case MMC_VDD_30_31:
182			mV = 3000;
183			break;
184		case MMC_VDD_28_29:
185			mV = 2800;
186			break;
187		case MMC_VDD_165_195:
188			mV = 1850;
189			break;
190		default:
191			BUG();
192		}
193		return menelaus_set_vmmc(mV);
194	} else {
195		if (!power_on)
196			return menelaus_set_vdcdc(3, 0);
197		switch (1 << vdd) {
198		case MMC_VDD_33_34:
199		case MMC_VDD_32_33:
200			mV = 3300;
201			break;
202		case MMC_VDD_30_31:
203		case MMC_VDD_29_30:
204			mV = 3000;
205			break;
206		case MMC_VDD_28_29:
207		case MMC_VDD_27_28:
208			mV = 2800;
209			break;
210		case MMC_VDD_24_25:
211		case MMC_VDD_23_24:
212			mV = 2400;
213			break;
214		case MMC_VDD_22_23:
215		case MMC_VDD_21_22:
216			mV = 2200;
217			break;
218		case MMC_VDD_20_21:
219			mV = 2000;
220			break;
221		case MMC_VDD_165_195:
222			mV = 1800;
223			break;
224		default:
225			BUG();
226		}
227		return menelaus_set_vdcdc(3, mV);
228	}
229	return 0;
230}
231
232static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
233			      int vdd)
234{
235	if (board_is_n800() || slot == 0)
236		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
237
238	/* The n810 power will be handled by GPIO code in the driver */
239
240	return 0;
241}
242
243static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
244{
245	int r;
246
247	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
248		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
249	BUG_ON(slot != 0 && slot != 1);
250	slot++;
251	switch (bus_mode) {
252	case MMC_BUSMODE_OPENDRAIN:
253		r = menelaus_set_mmc_opendrain(slot, 1);
254		break;
255	case MMC_BUSMODE_PUSHPULL:
256		r = menelaus_set_mmc_opendrain(slot, 0);
257		break;
258	default:
259		BUG();
260	}
261	if (r != 0 && printk_ratelimit())
262		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
263			slot);
264	return r;
265}
266
267static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
268{
269	slot++;
270	BUG_ON(slot != 1 && slot != 2);
271	if (slot == 1)
272		return slot1_cover_open;
273	else
274		return slot2_cover_open;
275}
276
277static void n8x0_mmc_callback(void *data, u8 card_mask)
278{
279#ifdef CONFIG_MMC_OMAP
280	int bit, *openp, index;
281
282	if (board_is_n800()) {
283		bit = 1 << 1;
284		openp = &slot2_cover_open;
285		index = 1;
286	} else {
287		bit = 1;
288		openp = &slot1_cover_open;
289		index = 0;
290	}
291
292	if (card_mask & bit)
293		*openp = 1;
294	else
295		*openp = 0;
296
297	omap_mmc_notify_cover_event(mmc_device, index, *openp);
298#else
299	pr_warn("MMC: notify cover event not available\n");
300#endif
301}
302
303static int n8x0_mmc_late_init(struct device *dev)
304{
305	int r, bit, *openp;
306	int vs2sel;
307
308	mmc_device = dev;
309
310	r = menelaus_set_slot_sel(1);
311	if (r < 0)
312		return r;
313
314	if (board_is_n800())
315		vs2sel = 0;
316	else
317		vs2sel = 2;
318
319	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
320	if (r < 0)
321		return r;
322
323	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
324	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
325
326	r = menelaus_set_mmc_slot(1, 1, 0, 1);
327	if (r < 0)
328		return r;
329	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
330	if (r < 0)
331		return r;
332
333	r = menelaus_get_slot_pin_states();
334	if (r < 0)
335		return r;
336
337	if (board_is_n800()) {
338		bit = 1 << 1;
339		openp = &slot2_cover_open;
340	} else {
341		bit = 1;
342		openp = &slot1_cover_open;
343		slot2_cover_open = 0;
344	}
345
346	/* All slot pin bits seem to be inversed until first switch change */
347	if (r == 0xf || r == (0xf & ~bit))
348		r = ~r;
349
350	if (r & bit)
351		*openp = 1;
352	else
353		*openp = 0;
354
355	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
356
357	return r;
358}
359
360static void n8x0_mmc_shutdown(struct device *dev)
361{
362	int vs2sel;
363
364	if (board_is_n800())
365		vs2sel = 0;
366	else
367		vs2sel = 2;
368
369	menelaus_set_mmc_slot(1, 0, 0, 0);
370	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
371}
372
373static void n8x0_mmc_cleanup(struct device *dev)
374{
375	menelaus_unregister_mmc_callback();
376}
377
378/*
379 * MMC controller1 has two slots that are multiplexed via I2C.
380 * MMC controller2 is not in use.
381 */
382static struct omap_mmc_platform_data mmc1_data = {
383	.nr_slots			= 0,
384	.init				= n8x0_mmc_late_init,
385	.cleanup			= n8x0_mmc_cleanup,
386	.shutdown			= n8x0_mmc_shutdown,
387	.max_freq			= 24000000,
388	.slots[0] = {
389		.wires			= 4,
390		.set_power		= n8x0_mmc_set_power,
391		.set_bus_mode		= n8x0_mmc_set_bus_mode,
392		.get_cover_state	= n8x0_mmc_get_cover_state,
393		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
394						MMC_VDD_32_33   | MMC_VDD_33_34,
395		.name			= "internal",
396	},
397	.slots[1] = {
398		.set_power		= n8x0_mmc_set_power,
399		.set_bus_mode		= n8x0_mmc_set_bus_mode,
400		.get_cover_state	= n8x0_mmc_get_cover_state,
401		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
402						MMC_VDD_21_22 | MMC_VDD_22_23 |
403						MMC_VDD_23_24 | MMC_VDD_24_25 |
404						MMC_VDD_27_28 | MMC_VDD_28_29 |
405						MMC_VDD_29_30 | MMC_VDD_30_31 |
406						MMC_VDD_32_33 | MMC_VDD_33_34,
407		.name			= "external",
408	},
409};
410
411static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
412
413static void __init n8x0_mmc_init(void)
414{
415	if (board_is_n810()) {
416		mmc1_data.slots[0].name = "external";
417
418		/*
419		 * Some Samsung Movinand chips do not like open-ended
420		 * multi-block reads and fall to braind-dead state
421		 * while doing so. Reducing the number of blocks in
422		 * the transfer or delays in clock disable do not help
423		 */
424		mmc1_data.slots[1].name = "internal";
425		mmc1_data.slots[1].ban_openended = 1;
426		gpiod_add_lookup_table(&nokia810_mmc_gpio_table);
427	} else {
428		gpiod_add_lookup_table(&nokia800_mmc_gpio_table);
429	}
430
431	mmc1_data.nr_slots = 2;
432	mmc_data[0] = &mmc1_data;
433}
434#else
435static struct omap_mmc_platform_data mmc1_data;
436static void __init n8x0_mmc_init(void)
437{
438}
439#endif	/* CONFIG_MMC_OMAP */
440
441#ifdef CONFIG_MENELAUS
442
443static int n8x0_auto_sleep_regulators(void)
444{
445	u32 val;
446	int ret;
447
448	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
449		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
450		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
451		| EN_VC_SLEEP | EN_DC2_SLEEP;
452
453	ret = menelaus_set_regulator_sleep(1, val);
454	if (ret < 0) {
455		pr_err("Could not set regulators to sleep on menelaus: %u\n",
456		       ret);
457		return ret;
458	}
459	return 0;
460}
461
462static int n8x0_auto_voltage_scale(void)
463{
464	int ret;
465
466	ret = menelaus_set_vcore_hw(1400, 1050);
467	if (ret < 0) {
468		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
469		return ret;
470	}
471	return 0;
472}
473
474static int n8x0_menelaus_late_init(struct device *dev)
475{
476	int ret;
477
478	ret = n8x0_auto_voltage_scale();
479	if (ret < 0)
480		return ret;
481	ret = n8x0_auto_sleep_regulators();
482	if (ret < 0)
483		return ret;
484	return 0;
485}
486
487#else
488static int n8x0_menelaus_late_init(struct device *dev)
489{
490	return 0;
491}
492#endif
493
494struct menelaus_platform_data n8x0_menelaus_platform_data = {
495	.late_init = n8x0_menelaus_late_init,
496};
497
498static struct gpiod_lookup_table nokia810_asoc_gpio_table = {
499	.dev_id = "soc-audio",
500	.table = {
501		GPIO_LOOKUP("gpio-0-15", 10, "headset", GPIO_ACTIVE_HIGH),
502		GPIO_LOOKUP("gpio-80-111", 21, "speaker", GPIO_ACTIVE_HIGH),
503		{ }
504	},
505};
506
507static int __init n8x0_late_initcall(void)
508{
509	if (!board_caps)
510		return -ENODEV;
511
512	n8x0_mmc_init();
513	n8x0_usb_init();
514	gpiod_add_lookup_table(&nokia810_asoc_gpio_table);
515
516	return 0;
517}
518omap_late_initcall(n8x0_late_initcall);
519
520/*
521 * Legacy init pdata init for n8x0. Note that we want to follow the
522 * I2C bus numbering starting at 0 for device tree like other omaps.
523 */
524void * __init n8x0_legacy_init(void)
525{
526	board_check_revision();
527	spi_register_board_info(n800_spi_board_info,
528				ARRAY_SIZE(n800_spi_board_info));
529	return &mmc1_data;
530}
531