xref: /openbmc/linux/arch/arm/mach-omap2/board-n8x0.c (revision 97e6f135) 
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 
44 static 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 
50 static 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 
65 static struct musb_hdrc_config musb_config = {
66 	.multipoint	= 1,
67 	.dyn_fifo	= 1,
68 	.num_eps	= 16,
69 	.ram_bits	= 12,
70 };
71 
72 static 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 
79 static struct gpiod_lookup_table tusb_gpio_table = {
80 	.dev_id = "musb-tusb",
81 	.table = {
82 		GPIO_LOOKUP("gpio-0-15", 0, "enable",
83 			    GPIO_ACTIVE_HIGH),
84 		GPIO_LOOKUP("gpio-48-63", 10, "int",
85 			    GPIO_ACTIVE_HIGH),
86 		{ }
87 	},
88 };
89 
90 static void __init n8x0_usb_init(void)
91 {
92 	int ret = 0;
93 
94 	gpiod_add_lookup_table(&tusb_gpio_table);
95 	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
96 				       TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
97 				       TUSB6010_DMACHAN);
98 	if (ret != 0)
99 		return;
100 
101 	pr_info("TUSB 6010\n");
102 
103 	return;
104 }
105 #else
106 
107 static void __init n8x0_usb_init(void) {}
108 
109 #endif /*CONFIG_USB_MUSB_TUSB6010 */
110 
111 
112 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
113 	.turbo_mode	= 0,
114 };
115 
116 static struct spi_board_info n800_spi_board_info[] __initdata = {
117 	{
118 		.modalias	= "p54spi",
119 		.bus_num	= 2,
120 		.chip_select	= 0,
121 		.max_speed_hz   = 48000000,
122 		.controller_data = &p54spi_mcspi_config,
123 	},
124 };
125 
126 #if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
127 
128 /*
129  * On both N800 and N810, only the first of the two MMC controllers is in use.
130  * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
131  * On N800, both slots are powered via Menelaus. On N810, only one of the
132  * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
133  *
134  * VMMC				slot 1 on both N800 and N810
135  * VDCDC3_APE and VMCS2_APE	slot 2 on N800
136  * GPIO23 and GPIO9		slot 2 EMMC on N810
137  *
138  */
139 static int slot1_cover_open;
140 static int slot2_cover_open;
141 static struct device *mmc_device;
142 
143 static struct gpiod_lookup_table nokia8xx_mmc_gpio_table = {
144 	.dev_id = "mmci-omap.0",
145 	.table = {
146 		/* Slot switch, GPIO 96 */
147 		GPIO_LOOKUP("gpio-80-111", 16,
148 			    "switch", GPIO_ACTIVE_HIGH),
149 		{ }
150 	},
151 };
152 
153 static struct gpiod_lookup_table nokia810_mmc_gpio_table = {
154 	.dev_id = "mmci-omap.0",
155 	.table = {
156 		/* Slot index 1, VSD power, GPIO 23 */
157 		GPIO_LOOKUP_IDX("gpio-16-31", 7,
158 				"vsd", 1, GPIO_ACTIVE_HIGH),
159 		/* Slot index 1, VIO power, GPIO 9 */
160 		GPIO_LOOKUP_IDX("gpio-0-15", 9,
161 				"vio", 1, GPIO_ACTIVE_HIGH),
162 		{ }
163 	},
164 };
165 
166 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
167 					int power_on, int vdd)
168 {
169 	int mV;
170 
171 #ifdef CONFIG_MMC_DEBUG
172 	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
173 		power_on ? "on" : "off", vdd);
174 #endif
175 	if (slot == 0) {
176 		if (!power_on)
177 			return menelaus_set_vmmc(0);
178 		switch (1 << vdd) {
179 		case MMC_VDD_33_34:
180 		case MMC_VDD_32_33:
181 		case MMC_VDD_31_32:
182 			mV = 3100;
183 			break;
184 		case MMC_VDD_30_31:
185 			mV = 3000;
186 			break;
187 		case MMC_VDD_28_29:
188 			mV = 2800;
189 			break;
190 		case MMC_VDD_165_195:
191 			mV = 1850;
192 			break;
193 		default:
194 			BUG();
195 		}
196 		return menelaus_set_vmmc(mV);
197 	} else {
198 		if (!power_on)
199 			return menelaus_set_vdcdc(3, 0);
200 		switch (1 << vdd) {
201 		case MMC_VDD_33_34:
202 		case MMC_VDD_32_33:
203 			mV = 3300;
204 			break;
205 		case MMC_VDD_30_31:
206 		case MMC_VDD_29_30:
207 			mV = 3000;
208 			break;
209 		case MMC_VDD_28_29:
210 		case MMC_VDD_27_28:
211 			mV = 2800;
212 			break;
213 		case MMC_VDD_24_25:
214 		case MMC_VDD_23_24:
215 			mV = 2400;
216 			break;
217 		case MMC_VDD_22_23:
218 		case MMC_VDD_21_22:
219 			mV = 2200;
220 			break;
221 		case MMC_VDD_20_21:
222 			mV = 2000;
223 			break;
224 		case MMC_VDD_165_195:
225 			mV = 1800;
226 			break;
227 		default:
228 			BUG();
229 		}
230 		return menelaus_set_vdcdc(3, mV);
231 	}
232 	return 0;
233 }
234 
235 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
236 			      int vdd)
237 {
238 	if (board_is_n800() || slot == 0)
239 		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
240 
241 	/* The n810 power will be handled by GPIO code in the driver */
242 
243 	return 0;
244 }
245 
246 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
247 {
248 	int r;
249 
250 	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
251 		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
252 	BUG_ON(slot != 0 && slot != 1);
253 	slot++;
254 	switch (bus_mode) {
255 	case MMC_BUSMODE_OPENDRAIN:
256 		r = menelaus_set_mmc_opendrain(slot, 1);
257 		break;
258 	case MMC_BUSMODE_PUSHPULL:
259 		r = menelaus_set_mmc_opendrain(slot, 0);
260 		break;
261 	default:
262 		BUG();
263 	}
264 	if (r != 0 && printk_ratelimit())
265 		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
266 			slot);
267 	return r;
268 }
269 
270 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
271 {
272 	slot++;
273 	BUG_ON(slot != 1 && slot != 2);
274 	if (slot == 1)
275 		return slot1_cover_open;
276 	else
277 		return slot2_cover_open;
278 }
279 
280 static void n8x0_mmc_callback(void *data, u8 card_mask)
281 {
282 #ifdef CONFIG_MMC_OMAP
283 	int bit, *openp, index;
284 
285 	if (board_is_n800()) {
286 		bit = 1 << 1;
287 		openp = &slot2_cover_open;
288 		index = 1;
289 	} else {
290 		bit = 1;
291 		openp = &slot1_cover_open;
292 		index = 0;
293 	}
294 
295 	if (card_mask & bit)
296 		*openp = 1;
297 	else
298 		*openp = 0;
299 
300 	omap_mmc_notify_cover_event(mmc_device, index, *openp);
301 #else
302 	pr_warn("MMC: notify cover event not available\n");
303 #endif
304 }
305 
306 static int n8x0_mmc_late_init(struct device *dev)
307 {
308 	int r, bit, *openp;
309 	int vs2sel;
310 
311 	mmc_device = dev;
312 
313 	r = menelaus_set_slot_sel(1);
314 	if (r < 0)
315 		return r;
316 
317 	if (board_is_n800())
318 		vs2sel = 0;
319 	else
320 		vs2sel = 2;
321 
322 	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
323 	if (r < 0)
324 		return r;
325 
326 	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
327 	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
328 
329 	r = menelaus_set_mmc_slot(1, 1, 0, 1);
330 	if (r < 0)
331 		return r;
332 	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
333 	if (r < 0)
334 		return r;
335 
336 	r = menelaus_get_slot_pin_states();
337 	if (r < 0)
338 		return r;
339 
340 	if (board_is_n800()) {
341 		bit = 1 << 1;
342 		openp = &slot2_cover_open;
343 	} else {
344 		bit = 1;
345 		openp = &slot1_cover_open;
346 		slot2_cover_open = 0;
347 	}
348 
349 	/* All slot pin bits seem to be inversed until first switch change */
350 	if (r == 0xf || r == (0xf & ~bit))
351 		r = ~r;
352 
353 	if (r & bit)
354 		*openp = 1;
355 	else
356 		*openp = 0;
357 
358 	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
359 
360 	return r;
361 }
362 
363 static void n8x0_mmc_shutdown(struct device *dev)
364 {
365 	int vs2sel;
366 
367 	if (board_is_n800())
368 		vs2sel = 0;
369 	else
370 		vs2sel = 2;
371 
372 	menelaus_set_mmc_slot(1, 0, 0, 0);
373 	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
374 }
375 
376 static void n8x0_mmc_cleanup(struct device *dev)
377 {
378 	menelaus_unregister_mmc_callback();
379 }
380 
381 /*
382  * MMC controller1 has two slots that are multiplexed via I2C.
383  * MMC controller2 is not in use.
384  */
385 static struct omap_mmc_platform_data mmc1_data = {
386 	.nr_slots			= 0,
387 	.init				= n8x0_mmc_late_init,
388 	.cleanup			= n8x0_mmc_cleanup,
389 	.shutdown			= n8x0_mmc_shutdown,
390 	.max_freq			= 24000000,
391 	.slots[0] = {
392 		.wires			= 4,
393 		.set_power		= n8x0_mmc_set_power,
394 		.set_bus_mode		= n8x0_mmc_set_bus_mode,
395 		.get_cover_state	= n8x0_mmc_get_cover_state,
396 		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
397 						MMC_VDD_32_33   | MMC_VDD_33_34,
398 		.name			= "internal",
399 	},
400 	.slots[1] = {
401 		.set_power		= n8x0_mmc_set_power,
402 		.set_bus_mode		= n8x0_mmc_set_bus_mode,
403 		.get_cover_state	= n8x0_mmc_get_cover_state,
404 		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
405 						MMC_VDD_21_22 | MMC_VDD_22_23 |
406 						MMC_VDD_23_24 | MMC_VDD_24_25 |
407 						MMC_VDD_27_28 | MMC_VDD_28_29 |
408 						MMC_VDD_29_30 | MMC_VDD_30_31 |
409 						MMC_VDD_32_33 | MMC_VDD_33_34,
410 		.name			= "external",
411 	},
412 };
413 
414 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
415 
416 static void __init n8x0_mmc_init(void)
417 {
418 	gpiod_add_lookup_table(&nokia8xx_mmc_gpio_table);
419 
420 	if (board_is_n810()) {
421 		mmc1_data.slots[0].name = "external";
422 
423 		/*
424 		 * Some Samsung Movinand chips do not like open-ended
425 		 * multi-block reads and fall to braind-dead state
426 		 * while doing so. Reducing the number of blocks in
427 		 * the transfer or delays in clock disable do not help
428 		 */
429 		mmc1_data.slots[1].name = "internal";
430 		mmc1_data.slots[1].ban_openended = 1;
431 		gpiod_add_lookup_table(&nokia810_mmc_gpio_table);
432 	}
433 
434 	mmc1_data.nr_slots = 2;
435 	mmc_data[0] = &mmc1_data;
436 }
437 #else
438 static struct omap_mmc_platform_data mmc1_data;
439 static void __init n8x0_mmc_init(void)
440 {
441 }
442 #endif	/* CONFIG_MMC_OMAP */
443 
444 #ifdef CONFIG_MENELAUS
445 
446 static int n8x0_auto_sleep_regulators(void)
447 {
448 	u32 val;
449 	int ret;
450 
451 	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
452 		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
453 		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
454 		| EN_VC_SLEEP | EN_DC2_SLEEP;
455 
456 	ret = menelaus_set_regulator_sleep(1, val);
457 	if (ret < 0) {
458 		pr_err("Could not set regulators to sleep on menelaus: %u\n",
459 		       ret);
460 		return ret;
461 	}
462 	return 0;
463 }
464 
465 static int n8x0_auto_voltage_scale(void)
466 {
467 	int ret;
468 
469 	ret = menelaus_set_vcore_hw(1400, 1050);
470 	if (ret < 0) {
471 		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
472 		return ret;
473 	}
474 	return 0;
475 }
476 
477 static int n8x0_menelaus_late_init(struct device *dev)
478 {
479 	int ret;
480 
481 	ret = n8x0_auto_voltage_scale();
482 	if (ret < 0)
483 		return ret;
484 	ret = n8x0_auto_sleep_regulators();
485 	if (ret < 0)
486 		return ret;
487 	return 0;
488 }
489 
490 #else
491 static int n8x0_menelaus_late_init(struct device *dev)
492 {
493 	return 0;
494 }
495 #endif
496 
497 struct menelaus_platform_data n8x0_menelaus_platform_data = {
498 	.late_init = n8x0_menelaus_late_init,
499 };
500 
501 static int __init n8x0_late_initcall(void)
502 {
503 	if (!board_caps)
504 		return -ENODEV;
505 
506 	n8x0_mmc_init();
507 	n8x0_usb_init();
508 
509 	return 0;
510 }
511 omap_late_initcall(n8x0_late_initcall);
512 
513 /*
514  * Legacy init pdata init for n8x0. Note that we want to follow the
515  * I2C bus numbering starting at 0 for device tree like other omaps.
516  */
517 void * __init n8x0_legacy_init(void)
518 {
519 	board_check_revision();
520 	spi_register_board_info(n800_spi_board_info,
521 				ARRAY_SIZE(n800_spi_board_info));
522 	return &mmc1_data;
523 }
524