xref: /openbmc/linux/arch/arm/mach-omap2/board-n8x0.c (revision aac28965) 
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 
45 static 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 
51 static 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  */
70 static 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 
97 static struct musb_hdrc_config musb_config = {
98 	.multipoint	= 1,
99 	.dyn_fifo	= 1,
100 	.num_eps	= 16,
101 	.ram_bits	= 12,
102 };
103 
104 static 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 
112 static 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 
137 err:
138 	gpio_free(TUSB6010_GPIO_ENABLE);
139 }
140 #else
141 
142 static void __init n8x0_usb_init(void) {}
143 
144 #endif /*CONFIG_USB_MUSB_TUSB6010 */
145 
146 
147 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
148 	.turbo_mode	= 0,
149 };
150 
151 static 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 
178 static int slot1_cover_open;
179 static int slot2_cover_open;
180 static struct device *mmc_device;
181 
182 static 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 
191 static 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 
260 static 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 
278 static 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 
289 static 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 
313 static 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 
323 static 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 
349 static 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 
406 static 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 
419 static 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  */
435 static 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 
465 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
466 
467 static 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 
472 static 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
507 static struct omap_mmc_platform_data mmc1_data;
508 void __init n8x0_mmc_init(void)
509 {
510 }
511 #endif	/* CONFIG_MMC_OMAP */
512 
513 #ifdef CONFIG_MENELAUS
514 
515 static 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 
534 static 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 
546 static 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
560 static int n8x0_menelaus_late_init(struct device *dev)
561 {
562 	return 0;
563 }
564 #endif
565 
566 struct menelaus_platform_data n8x0_menelaus_platform_data = {
567 	.late_init = n8x0_menelaus_late_init,
568 };
569 
570 struct aic3x_pdata n810_aic33_data = {
571 	.gpio_reset = 118,
572 };
573 
574 static 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 }
584 omap_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  */
590 void * __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