1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * linux/arch/arm/mach-omap1/board-ams-delta.c
4  *
5  * Modified from board-generic.c
6  *
7  * Board specific inits for the Amstrad E3 (codename Delta) videophone
8  *
9  * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
10  */
11 #include <linux/gpio/driver.h>
12 #include <linux/gpio/machine.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/gpio.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/input.h>
18 #include <linux/interrupt.h>
19 #include <linux/leds.h>
20 #include <linux/mtd/nand-gpio.h>
21 #include <linux/mtd/partitions.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/regulator/fixed.h>
25 #include <linux/regulator/machine.h>
26 #include <linux/serial_8250.h>
27 #include <linux/export.h>
28 #include <linux/omapfb.h>
29 #include <linux/io.h>
30 #include <linux/platform_data/gpio-omap.h>
31 
32 #include <asm/serial.h>
33 #include <asm/mach-types.h>
34 #include <asm/mach/arch.h>
35 #include <asm/mach/map.h>
36 
37 #include <linux/platform_data/keypad-omap.h>
38 #include <mach/mux.h>
39 
40 #include <mach/hardware.h>
41 #include <mach/usb.h>
42 
43 #include "ams-delta-fiq.h"
44 #include "board-ams-delta.h"
45 #include "iomap.h"
46 #include "common.h"
47 
48 static const unsigned int ams_delta_keymap[] = {
49 	KEY(0, 0, KEY_F1),		/* Advert    */
50 
51 	KEY(0, 3, KEY_COFFEE),		/* Games     */
52 	KEY(0, 2, KEY_QUESTION),	/* Directory */
53 	KEY(2, 3, KEY_CONNECT),		/* Internet  */
54 	KEY(1, 2, KEY_SHOP),		/* Services  */
55 	KEY(1, 1, KEY_PHONE),		/* VoiceMail */
56 
57 	KEY(0, 1, KEY_DELETE),		/* Delete    */
58 	KEY(2, 2, KEY_PLAY),		/* Play      */
59 	KEY(1, 0, KEY_PAGEUP),		/* Up        */
60 	KEY(1, 3, KEY_PAGEDOWN),	/* Down      */
61 	KEY(2, 0, KEY_EMAIL),		/* ReadEmail */
62 	KEY(2, 1, KEY_STOP),		/* Stop      */
63 
64 	/* Numeric keypad portion */
65 	KEY(0, 7, KEY_KP1),
66 	KEY(0, 6, KEY_KP2),
67 	KEY(0, 5, KEY_KP3),
68 	KEY(1, 7, KEY_KP4),
69 	KEY(1, 6, KEY_KP5),
70 	KEY(1, 5, KEY_KP6),
71 	KEY(2, 7, KEY_KP7),
72 	KEY(2, 6, KEY_KP8),
73 	KEY(2, 5, KEY_KP9),
74 	KEY(3, 6, KEY_KP0),
75 	KEY(3, 7, KEY_KPASTERISK),
76 	KEY(3, 5, KEY_KPDOT),		/* # key     */
77 	KEY(7, 2, KEY_NUMLOCK),		/* Mute      */
78 	KEY(7, 1, KEY_KPMINUS),		/* Recall    */
79 	KEY(6, 1, KEY_KPPLUS),		/* Redial    */
80 	KEY(7, 6, KEY_KPSLASH),		/* Handsfree */
81 	KEY(6, 0, KEY_ENTER),		/* Video     */
82 
83 	KEY(7, 4, KEY_CAMERA),		/* Photo     */
84 
85 	KEY(0, 4, KEY_F2),		/* Home      */
86 	KEY(1, 4, KEY_F3),		/* Office    */
87 	KEY(2, 4, KEY_F4),		/* Mobile    */
88 	KEY(7, 7, KEY_F5),		/* SMS       */
89 	KEY(7, 5, KEY_F6),		/* Email     */
90 
91 	/* QWERTY portion of keypad */
92 	KEY(3, 4, KEY_Q),
93 	KEY(3, 3, KEY_W),
94 	KEY(3, 2, KEY_E),
95 	KEY(3, 1, KEY_R),
96 	KEY(3, 0, KEY_T),
97 	KEY(4, 7, KEY_Y),
98 	KEY(4, 6, KEY_U),
99 	KEY(4, 5, KEY_I),
100 	KEY(4, 4, KEY_O),
101 	KEY(4, 3, KEY_P),
102 
103 	KEY(4, 2, KEY_A),
104 	KEY(4, 1, KEY_S),
105 	KEY(4, 0, KEY_D),
106 	KEY(5, 7, KEY_F),
107 	KEY(5, 6, KEY_G),
108 	KEY(5, 5, KEY_H),
109 	KEY(5, 4, KEY_J),
110 	KEY(5, 3, KEY_K),
111 	KEY(5, 2, KEY_L),
112 
113 	KEY(5, 1, KEY_Z),
114 	KEY(5, 0, KEY_X),
115 	KEY(6, 7, KEY_C),
116 	KEY(6, 6, KEY_V),
117 	KEY(6, 5, KEY_B),
118 	KEY(6, 4, KEY_N),
119 	KEY(6, 3, KEY_M),
120 	KEY(6, 2, KEY_SPACE),
121 
122 	KEY(7, 0, KEY_LEFTSHIFT),	/* Vol up    */
123 	KEY(7, 3, KEY_LEFTCTRL),	/* Vol down  */
124 };
125 
126 #define LATCH1_PHYS	0x01000000
127 #define LATCH1_VIRT	0xEA000000
128 #define MODEM_PHYS	0x04000000
129 #define MODEM_VIRT	0xEB000000
130 #define LATCH2_PHYS	0x08000000
131 #define LATCH2_VIRT	0xEC000000
132 
133 static struct map_desc ams_delta_io_desc[] __initdata = {
134 	/* AMS_DELTA_LATCH1 */
135 	{
136 		.virtual	= LATCH1_VIRT,
137 		.pfn		= __phys_to_pfn(LATCH1_PHYS),
138 		.length		= 0x01000000,
139 		.type		= MT_DEVICE
140 	},
141 	/* AMS_DELTA_LATCH2 */
142 	{
143 		.virtual	= LATCH2_VIRT,
144 		.pfn		= __phys_to_pfn(LATCH2_PHYS),
145 		.length		= 0x01000000,
146 		.type		= MT_DEVICE
147 	},
148 	/* AMS_DELTA_MODEM */
149 	{
150 		.virtual	= MODEM_VIRT,
151 		.pfn		= __phys_to_pfn(MODEM_PHYS),
152 		.length		= 0x01000000,
153 		.type		= MT_DEVICE
154 	}
155 };
156 
157 static const struct omap_lcd_config ams_delta_lcd_config __initconst = {
158 	.ctrl_name	= "internal",
159 };
160 
161 static struct omap_usb_config ams_delta_usb_config __initdata = {
162 	.register_host	= 1,
163 	.hmc_mode	= 16,
164 	.pins[0]	= 2,
165 };
166 
167 #define LATCH1_NGPIO		8
168 
169 static struct resource latch1_resources[] = {
170 	[0] = {
171 		.name	= "dat",
172 		.start	= LATCH1_PHYS,
173 		.end	= LATCH1_PHYS + (LATCH1_NGPIO - 1) / 8,
174 		.flags	= IORESOURCE_MEM,
175 	},
176 };
177 
178 #define LATCH1_LABEL	"latch1"
179 
180 static struct bgpio_pdata latch1_pdata = {
181 	.label	= LATCH1_LABEL,
182 	.base	= -1,
183 	.ngpio	= LATCH1_NGPIO,
184 };
185 
186 static struct platform_device latch1_gpio_device = {
187 	.name		= "basic-mmio-gpio",
188 	.id		= 0,
189 	.resource	= latch1_resources,
190 	.num_resources	= ARRAY_SIZE(latch1_resources),
191 	.dev		= {
192 		.platform_data	= &latch1_pdata,
193 	},
194 };
195 
196 #define LATCH1_PIN_LED_CAMERA		0
197 #define LATCH1_PIN_LED_ADVERT		1
198 #define LATCH1_PIN_LED_MAIL		2
199 #define LATCH1_PIN_LED_HANDSFREE	3
200 #define LATCH1_PIN_LED_VOICEMAIL	4
201 #define LATCH1_PIN_LED_VOICE		5
202 #define LATCH1_PIN_DOCKIT1		6
203 #define LATCH1_PIN_DOCKIT2		7
204 
205 #define LATCH2_NGPIO			16
206 
207 static struct resource latch2_resources[] = {
208 	[0] = {
209 		.name	= "dat",
210 		.start	= LATCH2_PHYS,
211 		.end	= LATCH2_PHYS + (LATCH2_NGPIO - 1) / 8,
212 		.flags	= IORESOURCE_MEM,
213 	},
214 };
215 
216 #define LATCH2_LABEL	"latch2"
217 
218 static struct bgpio_pdata latch2_pdata = {
219 	.label	= LATCH2_LABEL,
220 	.base	= -1,
221 	.ngpio	= LATCH2_NGPIO,
222 };
223 
224 static struct platform_device latch2_gpio_device = {
225 	.name		= "basic-mmio-gpio",
226 	.id		= 1,
227 	.resource	= latch2_resources,
228 	.num_resources	= ARRAY_SIZE(latch2_resources),
229 	.dev		= {
230 		.platform_data	= &latch2_pdata,
231 	},
232 };
233 
234 #define LATCH2_PIN_LCD_VBLEN		0
235 #define LATCH2_PIN_LCD_NDISP		1
236 #define LATCH2_PIN_NAND_NCE		2
237 #define LATCH2_PIN_NAND_NRE		3
238 #define LATCH2_PIN_NAND_NWP		4
239 #define LATCH2_PIN_NAND_NWE		5
240 #define LATCH2_PIN_NAND_ALE		6
241 #define LATCH2_PIN_NAND_CLE		7
242 #define LATCH2_PIN_KEYBRD_PWR		8
243 #define LATCH2_PIN_KEYBRD_DATAOUT	9
244 #define LATCH2_PIN_SCARD_RSTIN		10
245 #define LATCH2_PIN_SCARD_CMDVCC		11
246 #define LATCH2_PIN_MODEM_NRESET		12
247 #define LATCH2_PIN_MODEM_CODEC		13
248 #define LATCH2_PIN_HANDSFREE_MUTE	14
249 #define LATCH2_PIN_HANDSET_MUTE		15
250 
251 static struct regulator_consumer_supply modem_nreset_consumers[] = {
252 	REGULATOR_SUPPLY("RESET#", "serial8250.1"),
253 	REGULATOR_SUPPLY("POR", "cx20442-codec"),
254 };
255 
256 static struct regulator_init_data modem_nreset_data = {
257 	.constraints		= {
258 		.valid_ops_mask		= REGULATOR_CHANGE_STATUS,
259 		.boot_on		= 1,
260 	},
261 	.num_consumer_supplies	= ARRAY_SIZE(modem_nreset_consumers),
262 	.consumer_supplies	= modem_nreset_consumers,
263 };
264 
265 static struct fixed_voltage_config modem_nreset_config = {
266 	.supply_name		= "modem_nreset",
267 	.microvolts		= 3300000,
268 	.startup_delay		= 25000,
269 	.enabled_at_boot	= 1,
270 	.init_data		= &modem_nreset_data,
271 };
272 
273 static struct platform_device modem_nreset_device = {
274 	.name	= "reg-fixed-voltage",
275 	.id	= -1,
276 	.dev	= {
277 		.platform_data	= &modem_nreset_config,
278 	},
279 };
280 
281 static struct gpiod_lookup_table ams_delta_nreset_gpiod_table = {
282 	.dev_id = "reg-fixed-voltage",
283 	.table = {
284 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_MODEM_NRESET,
285 			    NULL, GPIO_ACTIVE_HIGH),
286 		{ },
287 	},
288 };
289 
290 struct modem_private_data {
291 	struct regulator *regulator;
292 };
293 
294 static struct modem_private_data modem_priv;
295 
296 /*
297  * Define partitions for flash device
298  */
299 
300 static struct mtd_partition partition_info[] = {
301 	{ .name		= "Kernel",
302 	  .offset	= 0,
303 	  .size		= 3 * SZ_1M + SZ_512K },
304 	{ .name		= "u-boot",
305 	  .offset	= 3 * SZ_1M + SZ_512K,
306 	  .size		= SZ_256K },
307 	{ .name		= "u-boot params",
308 	  .offset	= 3 * SZ_1M + SZ_512K + SZ_256K,
309 	  .size		= SZ_256K },
310 	{ .name		= "Amstrad LDR",
311 	  .offset	= 4 * SZ_1M,
312 	  .size		= SZ_256K },
313 	{ .name		= "File system",
314 	  .offset	= 4 * SZ_1M + 1 * SZ_256K,
315 	  .size		= 27 * SZ_1M },
316 	{ .name		= "PBL reserved",
317 	  .offset	= 32 * SZ_1M - 3 * SZ_256K,
318 	  .size		=  3 * SZ_256K },
319 };
320 
321 static struct gpio_nand_platdata nand_platdata = {
322 	.parts		= partition_info,
323 	.num_parts	= ARRAY_SIZE(partition_info),
324 };
325 
326 static struct platform_device ams_delta_nand_device = {
327 	.name	= "ams-delta-nand",
328 	.id	= -1,
329 	.dev	= {
330 		.platform_data = &nand_platdata,
331 	},
332 };
333 
334 #define OMAP_GPIO_LABEL		"gpio-0-15"
335 #define OMAP_MPUIO_LABEL	"mpuio"
336 
337 static struct gpiod_lookup_table ams_delta_nand_gpio_table = {
338 	.table = {
339 		GPIO_LOOKUP(OMAP_GPIO_LABEL, AMS_DELTA_GPIO_PIN_NAND_RB, "rdy",
340 			    0),
341 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NCE, "nce",
342 			    GPIO_ACTIVE_LOW),
343 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NRE, "nre",
344 			    GPIO_ACTIVE_LOW),
345 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWP, "nwp",
346 			    GPIO_ACTIVE_LOW),
347 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe",
348 			    GPIO_ACTIVE_LOW),
349 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_ALE, "ale", 0),
350 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_CLE, "cle", 0),
351 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 0, "data", 0, 0),
352 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 1, "data", 1, 0),
353 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 2, "data", 2, 0),
354 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 3, "data", 3, 0),
355 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 4, "data", 4, 0),
356 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 5, "data", 5, 0),
357 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 6, "data", 6, 0),
358 		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 7, "data", 7, 0),
359 		{ },
360 	},
361 };
362 
363 static struct resource ams_delta_kp_resources[] = {
364 	[0] = {
365 		.start	= INT_KEYBOARD,
366 		.end	= INT_KEYBOARD,
367 		.flags	= IORESOURCE_IRQ,
368 	},
369 };
370 
371 static const struct matrix_keymap_data ams_delta_keymap_data = {
372 	.keymap		= ams_delta_keymap,
373 	.keymap_size	= ARRAY_SIZE(ams_delta_keymap),
374 };
375 
376 static struct omap_kp_platform_data ams_delta_kp_data = {
377 	.rows		= 8,
378 	.cols		= 8,
379 	.keymap_data	= &ams_delta_keymap_data,
380 	.delay		= 9,
381 };
382 
383 static struct platform_device ams_delta_kp_device = {
384 	.name		= "omap-keypad",
385 	.id		= -1,
386 	.dev		= {
387 		.platform_data = &ams_delta_kp_data,
388 	},
389 	.num_resources	= ARRAY_SIZE(ams_delta_kp_resources),
390 	.resource	= ams_delta_kp_resources,
391 };
392 
393 static struct platform_device ams_delta_lcd_device = {
394 	.name	= "lcd_ams_delta",
395 	.id	= -1,
396 };
397 
398 static struct gpiod_lookup_table ams_delta_lcd_gpio_table = {
399 	.table = {
400 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_LCD_VBLEN, "vblen", 0),
401 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_LCD_NDISP, "ndisp", 0),
402 		{ },
403 	},
404 };
405 
406 static struct gpio_led gpio_leds[] __initdata = {
407 	[LATCH1_PIN_LED_CAMERA] = {
408 		.name		 = "camera",
409 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
410 #ifdef CONFIG_LEDS_TRIGGERS
411 		.default_trigger = "ams_delta_camera",
412 #endif
413 	},
414 	[LATCH1_PIN_LED_ADVERT] = {
415 		.name		 = "advert",
416 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
417 	},
418 	[LATCH1_PIN_LED_MAIL] = {
419 		.name		 = "email",
420 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
421 	},
422 	[LATCH1_PIN_LED_HANDSFREE] = {
423 		.name		 = "handsfree",
424 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
425 	},
426 	[LATCH1_PIN_LED_VOICEMAIL] = {
427 		.name		 = "voicemail",
428 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
429 	},
430 	[LATCH1_PIN_LED_VOICE] = {
431 		.name		 = "voice",
432 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
433 	},
434 };
435 
436 static const struct gpio_led_platform_data leds_pdata __initconst = {
437 	.leds		= gpio_leds,
438 	.num_leds	= ARRAY_SIZE(gpio_leds),
439 };
440 
441 static struct gpiod_lookup_table leds_gpio_table = {
442 	.table = {
443 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_CAMERA, NULL,
444 				LATCH1_PIN_LED_CAMERA, 0),
445 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_ADVERT, NULL,
446 				LATCH1_PIN_LED_ADVERT, 0),
447 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_MAIL, NULL,
448 				LATCH1_PIN_LED_MAIL, 0),
449 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_HANDSFREE, NULL,
450 				LATCH1_PIN_LED_HANDSFREE, 0),
451 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_VOICEMAIL, NULL,
452 				LATCH1_PIN_LED_VOICEMAIL, 0),
453 		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_VOICE, NULL,
454 				LATCH1_PIN_LED_VOICE, 0),
455 		{ },
456 	},
457 };
458 
459 #ifdef CONFIG_LEDS_TRIGGERS
460 DEFINE_LED_TRIGGER(ams_delta_camera_led_trigger);
461 
462 static int ams_delta_camera_power(struct device *dev, int power)
463 {
464 	/*
465 	 * turn on camera LED
466 	 */
467 	if (power)
468 		led_trigger_event(ams_delta_camera_led_trigger, LED_FULL);
469 	else
470 		led_trigger_event(ams_delta_camera_led_trigger, LED_OFF);
471 	return 0;
472 }
473 #else
474 #define ams_delta_camera_power	NULL
475 #endif
476 
477 static struct platform_device ams_delta_audio_device = {
478 	.name   = "ams-delta-audio",
479 	.id     = -1,
480 };
481 
482 static struct gpiod_lookup_table ams_delta_audio_gpio_table = {
483 	.table = {
484 		GPIO_LOOKUP(OMAP_GPIO_LABEL, AMS_DELTA_GPIO_PIN_HOOK_SWITCH,
485 			    "hook_switch", 0),
486 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_MODEM_CODEC,
487 			    "modem_codec", 0),
488 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_HANDSFREE_MUTE,
489 			    "handsfree_mute", 0),
490 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_HANDSET_MUTE,
491 			    "handset_mute", 0),
492 		{ },
493 	},
494 };
495 
496 static struct platform_device cx20442_codec_device = {
497 	.name   = "cx20442-codec",
498 	.id     = -1,
499 };
500 
501 static struct resource ams_delta_serio_resources[] = {
502 	{
503 		.flags	= IORESOURCE_IRQ,
504 		/*
505 		 * Initialize IRQ resource with invalid IRQ number.
506 		 * It will be replaced with dynamically allocated GPIO IRQ
507 		 * obtained from GPIO chip as soon as the chip is available.
508 		 */
509 		.start	= -EINVAL,
510 		.end	= -EINVAL,
511 	},
512 };
513 
514 static struct platform_device ams_delta_serio_device = {
515 	.name		= "ams-delta-serio",
516 	.id		= PLATFORM_DEVID_NONE,
517 	.dev		= {
518 		/*
519 		 * Initialize .platform_data explicitly with NULL to
520 		 * indicate it is going to be used.  It will be replaced
521 		 * with FIQ buffer address as soon as FIQ is initialized.
522 		 */
523 		.platform_data = NULL,
524 	},
525 	.num_resources	= ARRAY_SIZE(ams_delta_serio_resources),
526 	.resource	= ams_delta_serio_resources,
527 };
528 
529 static struct regulator_consumer_supply keybrd_pwr_consumers[] = {
530 	/*
531 	 * Initialize supply .dev_name with NULL.  It will be replaced
532 	 * with serio dev_name() as soon as the serio device is registered.
533 	 */
534 	REGULATOR_SUPPLY("vcc", NULL),
535 };
536 
537 static struct regulator_init_data keybrd_pwr_initdata = {
538 	.constraints		= {
539 		.valid_ops_mask		= REGULATOR_CHANGE_STATUS,
540 	},
541 	.num_consumer_supplies	= ARRAY_SIZE(keybrd_pwr_consumers),
542 	.consumer_supplies	= keybrd_pwr_consumers,
543 };
544 
545 static struct fixed_voltage_config keybrd_pwr_config = {
546 	.supply_name		= "keybrd_pwr",
547 	.microvolts		= 5000000,
548 	.init_data		= &keybrd_pwr_initdata,
549 };
550 
551 static struct platform_device keybrd_pwr_device = {
552 	.name	= "reg-fixed-voltage",
553 	.id	= PLATFORM_DEVID_AUTO,
554 	.dev	= {
555 		.platform_data	= &keybrd_pwr_config,
556 	},
557 };
558 
559 static struct gpiod_lookup_table keybrd_pwr_gpio_table = {
560 	.table = {
561 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_KEYBRD_PWR, NULL,
562 			    GPIO_ACTIVE_HIGH),
563 		{ },
564 	},
565 };
566 
567 static struct platform_device *ams_delta_devices[] __initdata = {
568 	&latch1_gpio_device,
569 	&latch2_gpio_device,
570 	&ams_delta_kp_device,
571 	&ams_delta_audio_device,
572 	&ams_delta_serio_device,
573 	&ams_delta_nand_device,
574 	&ams_delta_lcd_device,
575 	&cx20442_codec_device,
576 };
577 
578 static struct gpiod_lookup_table *ams_delta_gpio_tables[] __initdata = {
579 	&ams_delta_nreset_gpiod_table,
580 	&ams_delta_audio_gpio_table,
581 	&keybrd_pwr_gpio_table,
582 	&ams_delta_lcd_gpio_table,
583 	&ams_delta_nand_gpio_table,
584 };
585 
586 /*
587  * Some drivers may not use GPIO lookup tables but need to be provided
588  * with GPIO numbers.  The same applies to GPIO based IRQ lines - some
589  * drivers may even not use GPIO layer but expect just IRQ numbers.
590  * We could either define GPIO lookup tables then use them on behalf
591  * of those devices, or we can use GPIO driver level methods for
592  * identification of GPIO and IRQ numbers. For the purpose of the latter,
593  * defina a helper function which identifies GPIO chips by their labels.
594  */
595 static int gpiochip_match_by_label(struct gpio_chip *chip, void *data)
596 {
597 	char *label = data;
598 
599 	return !strcmp(label, chip->label);
600 }
601 
602 static struct gpiod_hog ams_delta_gpio_hogs[] = {
603 	GPIO_HOG(LATCH2_LABEL, LATCH2_PIN_KEYBRD_DATAOUT, "keybrd_dataout",
604 		 GPIO_ACTIVE_HIGH, GPIOD_OUT_LOW),
605 	{},
606 };
607 
608 static struct plat_serial8250_port ams_delta_modem_ports[];
609 
610 /*
611  * Obtain MODEM IRQ GPIO descriptor using its hardware pin
612  * number and assign related IRQ number to the MODEM port.
613  * Keep the GPIO descriptor open so nobody steps in.
614  */
615 static void __init modem_assign_irq(struct gpio_chip *chip)
616 {
617 	struct gpio_desc *gpiod;
618 
619 	gpiod = gpiochip_request_own_desc(chip, AMS_DELTA_GPIO_PIN_MODEM_IRQ,
620 					  "modem_irq", GPIO_ACTIVE_HIGH,
621 					  GPIOD_IN);
622 	if (IS_ERR(gpiod)) {
623 		pr_err("%s: modem IRQ GPIO request failed (%ld)\n", __func__,
624 		       PTR_ERR(gpiod));
625 	} else {
626 		ams_delta_modem_ports[0].irq = gpiod_to_irq(gpiod);
627 	}
628 }
629 
630 /*
631  * The purpose of this function is to take care of proper initialization of
632  * devices and data structures which depend on GPIO lines provided by OMAP GPIO
633  * banks but their drivers don't use GPIO lookup tables or GPIO layer at all.
634  * The function may be called as soon as OMAP GPIO devices are probed.
635  * Since that happens at postcore_initcall, it can be called successfully
636  * from init_machine or later.
637  * Dependent devices may be registered from within this function or later.
638  */
639 static void __init omap_gpio_deps_init(void)
640 {
641 	struct gpio_chip *chip;
642 
643 	chip = gpiochip_find(OMAP_GPIO_LABEL, gpiochip_match_by_label);
644 	if (!chip) {
645 		pr_err("%s: OMAP GPIO chip not found\n", __func__);
646 		return;
647 	}
648 
649 	/*
650 	 * Start with FIQ initialization as it may have to request
651 	 * and release successfully each OMAP GPIO pin in turn.
652 	 */
653 	ams_delta_init_fiq(chip, &ams_delta_serio_device);
654 
655 	modem_assign_irq(chip);
656 }
657 
658 /*
659  * Initialize latch2 pins with values which are safe for dependent on-board
660  * devices or useful for their successull initialization even before GPIO
661  * driver takes control over the latch pins:
662  * - LATCH2_PIN_LCD_VBLEN	= 0
663  * - LATCH2_PIN_LCD_NDISP	= 0	Keep LCD device powered off before its
664  *					driver takes control over it.
665  * - LATCH2_PIN_NAND_NCE	= 0
666  * - LATCH2_PIN_NAND_NWP	= 0	Keep NAND device down and write-
667  *					protected before its driver takes
668  *					control over it.
669  * - LATCH2_PIN_KEYBRD_PWR	= 0	Keep keyboard powered off before serio
670  *					driver takes control over it.
671  * - LATCH2_PIN_KEYBRD_DATAOUT	= 0	Keep low to avoid corruption of first
672  *					byte of data received from attached
673  *					keyboard when serio device is probed;
674  *					the pin is also hogged low by the latch2
675  *					GPIO driver as soon as it is ready.
676  * - LATCH2_PIN_MODEM_NRESET	= 1	Enable voice MODEM device, allowing for
677  *					its successful probe even before a
678  *					regulator it depends on, which in turn
679  *					takes control over the pin, is set up.
680  * - LATCH2_PIN_MODEM_CODEC	= 1	Attach voice MODEM CODEC data port
681  *					to the MODEM so the CODEC is under
682  *					control even if audio driver doesn't
683  *					take it over.
684  */
685 static void __init ams_delta_latch2_init(void)
686 {
687 	u16 latch2 = 1 << LATCH2_PIN_MODEM_NRESET | 1 << LATCH2_PIN_MODEM_CODEC;
688 
689 	__raw_writew(latch2, LATCH2_VIRT);
690 }
691 
692 static void __init ams_delta_init(void)
693 {
694 	struct platform_device *leds_pdev;
695 
696 	/* mux pins for uarts */
697 	omap_cfg_reg(UART1_TX);
698 	omap_cfg_reg(UART1_RTS);
699 
700 	/* parallel camera interface */
701 	omap_cfg_reg(H19_1610_CAM_EXCLK);
702 	omap_cfg_reg(J15_1610_CAM_LCLK);
703 	omap_cfg_reg(L18_1610_CAM_VS);
704 	omap_cfg_reg(L15_1610_CAM_HS);
705 	omap_cfg_reg(L19_1610_CAM_D0);
706 	omap_cfg_reg(K14_1610_CAM_D1);
707 	omap_cfg_reg(K15_1610_CAM_D2);
708 	omap_cfg_reg(K19_1610_CAM_D3);
709 	omap_cfg_reg(K18_1610_CAM_D4);
710 	omap_cfg_reg(J14_1610_CAM_D5);
711 	omap_cfg_reg(J19_1610_CAM_D6);
712 	omap_cfg_reg(J18_1610_CAM_D7);
713 
714 	omap_gpio_deps_init();
715 	ams_delta_latch2_init();
716 	gpiod_add_hogs(ams_delta_gpio_hogs);
717 
718 	omap_serial_init();
719 	omap_register_i2c_bus(1, 100, NULL, 0);
720 
721 	omap1_usb_init(&ams_delta_usb_config);
722 #ifdef CONFIG_LEDS_TRIGGERS
723 	led_trigger_register_simple("ams_delta_camera",
724 			&ams_delta_camera_led_trigger);
725 #endif
726 	platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
727 
728 	/*
729 	 * As soon as regulator consumers have been registered, assign their
730 	 * dev_names to consumer supply entries of respective regulators.
731 	 */
732 	keybrd_pwr_consumers[0].dev_name =
733 			dev_name(&ams_delta_serio_device.dev);
734 
735 	/*
736 	 * Once consumer supply entries are populated with dev_names,
737 	 * register regulator devices.  At this stage only the keyboard
738 	 * power regulator has its consumer supply table fully populated.
739 	 */
740 	platform_device_register(&keybrd_pwr_device);
741 
742 	/*
743 	 * As soon as GPIO consumers have been registered, assign
744 	 * their dev_names to respective GPIO lookup tables.
745 	 */
746 	ams_delta_audio_gpio_table.dev_id =
747 			dev_name(&ams_delta_audio_device.dev);
748 	keybrd_pwr_gpio_table.dev_id = dev_name(&keybrd_pwr_device.dev);
749 	ams_delta_nand_gpio_table.dev_id = dev_name(&ams_delta_nand_device.dev);
750 	ams_delta_lcd_gpio_table.dev_id = dev_name(&ams_delta_lcd_device.dev);
751 
752 	/*
753 	 * Once GPIO lookup tables are populated with dev_names, register them.
754 	 */
755 	gpiod_add_lookup_tables(ams_delta_gpio_tables,
756 				ARRAY_SIZE(ams_delta_gpio_tables));
757 
758 	leds_pdev = gpio_led_register_device(PLATFORM_DEVID_NONE, &leds_pdata);
759 	if (!IS_ERR_OR_NULL(leds_pdev)) {
760 		leds_gpio_table.dev_id = dev_name(&leds_pdev->dev);
761 		gpiod_add_lookup_table(&leds_gpio_table);
762 	}
763 
764 	omap_writew(omap_readw(ARM_RSTCT1) | 0x0004, ARM_RSTCT1);
765 
766 	omapfb_set_lcd_config(&ams_delta_lcd_config);
767 }
768 
769 static void modem_pm(struct uart_port *port, unsigned int state, unsigned old)
770 {
771 	struct modem_private_data *priv = port->private_data;
772 	int ret;
773 
774 	if (!priv)
775 		return;
776 
777 	if (IS_ERR(priv->regulator))
778 		return;
779 
780 	if (state == old)
781 		return;
782 
783 	if (state == 0)
784 		ret = regulator_enable(priv->regulator);
785 	else if (old == 0)
786 		ret = regulator_disable(priv->regulator);
787 	else
788 		ret = 0;
789 
790 	if (ret)
791 		dev_warn(port->dev,
792 			 "ams_delta modem_pm: failed to %sable regulator: %d\n",
793 			 state ? "dis" : "en", ret);
794 }
795 
796 static struct plat_serial8250_port ams_delta_modem_ports[] = {
797 	{
798 		.membase	= IOMEM(MODEM_VIRT),
799 		.mapbase	= MODEM_PHYS,
800 		.irq		= IRQ_NOTCONNECTED, /* changed later */
801 		.flags		= UPF_BOOT_AUTOCONF,
802 		.irqflags	= IRQF_TRIGGER_RISING,
803 		.iotype		= UPIO_MEM,
804 		.regshift	= 1,
805 		.uartclk	= BASE_BAUD * 16,
806 		.pm		= modem_pm,
807 		.private_data	= &modem_priv,
808 	},
809 	{ },
810 };
811 
812 static struct platform_device ams_delta_modem_device = {
813 	.name	= "serial8250",
814 	.id	= PLAT8250_DEV_PLATFORM1,
815 	.dev		= {
816 		.platform_data = ams_delta_modem_ports,
817 	},
818 };
819 
820 static int __init modem_nreset_init(void)
821 {
822 	int err;
823 
824 	err = platform_device_register(&modem_nreset_device);
825 	if (err)
826 		pr_err("Couldn't register the modem regulator device\n");
827 
828 	return err;
829 }
830 
831 
832 /*
833  * This function expects MODEM IRQ number already assigned to the port.
834  * The MODEM device requires its RESET# pin kept high during probe.
835  * That requirement can be fulfilled in several ways:
836  * - with a descriptor of already functional modem_nreset regulator
837  *   assigned to the MODEM private data,
838  * - with the regulator not yet controlled by modem_pm function but
839  *   already enabled by default on probe,
840  * - before the modem_nreset regulator is probed, with the pin already
841  *   set high explicitly.
842  * The last one is already guaranteed by ams_delta_latch2_init() called
843  * from machine_init.
844  * In order to avoid taking over ttyS0 device slot, the MODEM device
845  * should be registered after OMAP serial ports.  Since those ports
846  * are registered at arch_initcall, this function can be called safely
847  * at arch_initcall_sync earliest.
848  */
849 static int __init ams_delta_modem_init(void)
850 {
851 	int err;
852 
853 	if (!machine_is_ams_delta())
854 		return -ENODEV;
855 
856 	omap_cfg_reg(M14_1510_GPIO2);
857 
858 	/* Initialize the modem_nreset regulator consumer before use */
859 	modem_priv.regulator = ERR_PTR(-ENODEV);
860 
861 	err = platform_device_register(&ams_delta_modem_device);
862 
863 	return err;
864 }
865 arch_initcall_sync(ams_delta_modem_init);
866 
867 static int __init late_init(void)
868 {
869 	int err;
870 
871 	err = modem_nreset_init();
872 	if (err)
873 		return err;
874 
875 	/*
876 	 * Once the modem device is registered, the modem_nreset
877 	 * regulator can be requested on behalf of that device.
878 	 */
879 	modem_priv.regulator = regulator_get(&ams_delta_modem_device.dev,
880 			"RESET#");
881 	if (IS_ERR(modem_priv.regulator)) {
882 		err = PTR_ERR(modem_priv.regulator);
883 		goto unregister;
884 	}
885 	return 0;
886 
887 unregister:
888 	platform_device_unregister(&ams_delta_modem_device);
889 	return err;
890 }
891 
892 static void __init ams_delta_init_late(void)
893 {
894 	omap1_init_late();
895 	late_init();
896 }
897 
898 static void __init ams_delta_map_io(void)
899 {
900 	omap15xx_map_io();
901 	iotable_init(ams_delta_io_desc, ARRAY_SIZE(ams_delta_io_desc));
902 }
903 
904 MACHINE_START(AMS_DELTA, "Amstrad E3 (Delta)")
905 	/* Maintainer: Jonathan McDowell <noodles@earth.li> */
906 	.atag_offset	= 0x100,
907 	.map_io		= ams_delta_map_io,
908 	.init_early	= omap1_init_early,
909 	.init_irq	= omap1_init_irq,
910 	.handle_irq	= omap1_handle_irq,
911 	.init_machine	= ams_delta_init,
912 	.init_late	= ams_delta_init_late,
913 	.init_time	= omap1_timer_init,
914 	.restart	= omap1_restart,
915 MACHINE_END
916