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1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
4 //
5 // Copyright (C) 2006-2009 by Openmoko, Inc.
6 // Authors: Harald Welte <laforge@openmoko.org>
7 //          Andy Green <andy@openmoko.org>
8 //          Werner Almesberger <werner@openmoko.org>
9 // All rights reserved.
10 
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/delay.h>
16 #include <linux/timer.h>
17 #include <linux/init.h>
18 #include <linux/gpio/machine.h>
19 #include <linux/gpio.h>
20 #include <linux/gpio_keys.h>
21 #include <linux/workqueue.h>
22 #include <linux/platform_device.h>
23 #include <linux/serial_core.h>
24 #include <linux/serial_s3c.h>
25 #include <linux/input.h>
26 #include <linux/io.h>
27 #include <linux/i2c.h>
28 
29 #include <linux/mmc/host.h>
30 
31 #include <linux/mfd/pcf50633/adc.h>
32 #include <linux/mfd/pcf50633/backlight.h>
33 #include <linux/mfd/pcf50633/core.h>
34 #include <linux/mfd/pcf50633/gpio.h>
35 #include <linux/mfd/pcf50633/mbc.h>
36 #include <linux/mfd/pcf50633/pmic.h>
37 
38 #include <linux/mtd/mtd.h>
39 #include <linux/mtd/rawnand.h>
40 #include <linux/mtd/nand-ecc-sw-hamming.h>
41 #include <linux/mtd/partitions.h>
42 #include <linux/mtd/physmap.h>
43 
44 #include <linux/regulator/machine.h>
45 
46 #include <linux/spi/spi.h>
47 #include <linux/spi/s3c24xx.h>
48 
49 #include <asm/irq.h>
50 #include <asm/mach-types.h>
51 #include <asm/mach/arch.h>
52 #include <asm/mach/map.h>
53 #include <asm/mach/irq.h>
54 
55 #include <linux/platform_data/i2c-s3c2410.h>
56 #include <linux/platform_data/mtd-nand-s3c2410.h>
57 #include <linux/platform_data/touchscreen-s3c2410.h>
58 #include <linux/platform_data/usb-ohci-s3c2410.h>
59 #include <linux/platform_data/usb-s3c2410_udc.h>
60 #include <linux/platform_data/fb-s3c2410.h>
61 
62 #include "regs-gpio.h"
63 #include "regs-irq.h"
64 #include "gpio-samsung.h"
65 
66 #include "cpu.h"
67 #include "devs.h"
68 #include "gpio-cfg.h"
69 #include "pm.h"
70 
71 #include "s3c24xx.h"
72 #include "gta02.h"
73 
74 static struct pcf50633 *gta02_pcf;
75 
76 /*
77  * This gets called frequently when we paniced.
78  */
79 
gta02_panic_blink(int state)80 static long gta02_panic_blink(int state)
81 {
82 	char led;
83 
84 	led = (state) ? 1 : 0;
85 	gpio_direction_output(GTA02_GPIO_AUX_LED, led);
86 
87 	return 0;
88 }
89 
90 
91 static struct map_desc gta02_iodesc[] __initdata = {
92 	{
93 		.virtual	= 0xe0000000,
94 		.pfn		= __phys_to_pfn(S3C2410_CS3 + 0x01000000),
95 		.length		= SZ_1M,
96 		.type		= MT_DEVICE
97 	},
98 };
99 
100 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
101 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
102 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
103 
104 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
105 	[0] = {
106 		.hwport		= 0,
107 		.flags		= 0,
108 		.ucon		= UCON,
109 		.ulcon		= ULCON,
110 		.ufcon		= UFCON,
111 	},
112 	[1] = {
113 		.hwport		= 1,
114 		.flags		= 0,
115 		.ucon		= UCON,
116 		.ulcon		= ULCON,
117 		.ufcon		= UFCON,
118 	},
119 	[2] = {
120 		.hwport		= 2,
121 		.flags		= 0,
122 		.ucon		= UCON,
123 		.ulcon		= ULCON,
124 		.ufcon		= UFCON,
125 	},
126 };
127 
128 #ifdef CONFIG_CHARGER_PCF50633
129 /*
130  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
131  * We use this to recognize that we can pull 1A from the USB socket.
132  *
133  * These constants are the measured pcf50633 ADC levels with the 1A
134  * charger / 48K resistor, and with no pulldown resistor.
135  */
136 
137 #define ADC_NOM_CHG_DETECT_1A 6
138 #define ADC_NOM_CHG_DETECT_USB 43
139 
140 #ifdef CONFIG_PCF50633_ADC
141 static void
gta02_configure_pmu_for_charger(struct pcf50633 * pcf,void * unused,int res)142 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
143 {
144 	int  ma;
145 
146 	/* Interpret charger type */
147 	if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
148 
149 		/*
150 		 * Sanity - stop GPO driving out now that we have a 1A charger
151 		 * GPO controls USB Host power generation on GTA02
152 		 */
153 		pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
154 
155 		ma = 1000;
156 	} else
157 		ma = 100;
158 
159 	pcf50633_mbc_usb_curlim_set(pcf, ma);
160 }
161 #endif
162 
163 static struct delayed_work gta02_charger_work;
164 static int gta02_usb_vbus_draw;
165 
gta02_charger_worker(struct work_struct * work)166 static void gta02_charger_worker(struct work_struct *work)
167 {
168 	if (gta02_usb_vbus_draw) {
169 		pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
170 		return;
171 	}
172 
173 #ifdef CONFIG_PCF50633_ADC
174 	pcf50633_adc_async_read(gta02_pcf,
175 				PCF50633_ADCC1_MUX_ADCIN1,
176 				PCF50633_ADCC1_AVERAGE_16,
177 				gta02_configure_pmu_for_charger,
178 				NULL);
179 #else
180 	/*
181 	 * If the PCF50633 ADC is disabled we fallback to a
182 	 * 100mA limit for safety.
183 	 */
184 	pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
185 #endif
186 }
187 
188 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
189 
gta02_pmu_event_callback(struct pcf50633 * pcf,int irq)190 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
191 {
192 	if (irq == PCF50633_IRQ_USBINS) {
193 		schedule_delayed_work(&gta02_charger_work,
194 				      GTA02_CHARGER_CONFIGURE_TIMEOUT);
195 
196 		return;
197 	}
198 
199 	if (irq == PCF50633_IRQ_USBREM) {
200 		cancel_delayed_work_sync(&gta02_charger_work);
201 		gta02_usb_vbus_draw = 0;
202 	}
203 }
204 
gta02_udc_vbus_draw(unsigned int ma)205 static void gta02_udc_vbus_draw(unsigned int ma)
206 {
207 	if (!gta02_pcf)
208 		return;
209 
210 	gta02_usb_vbus_draw = ma;
211 
212 	schedule_delayed_work(&gta02_charger_work,
213 			      GTA02_CHARGER_CONFIGURE_TIMEOUT);
214 }
215 #else /* !CONFIG_CHARGER_PCF50633 */
216 #define gta02_pmu_event_callback	NULL
217 #define gta02_udc_vbus_draw		NULL
218 #endif
219 
220 static char *gta02_batteries[] = {
221 	"battery",
222 };
223 
224 static struct pcf50633_bl_platform_data gta02_backlight_data = {
225 	.default_brightness = 0x3f,
226 	.default_brightness_limit = 0,
227 	.ramp_time = 5,
228 };
229 
230 static struct pcf50633_platform_data gta02_pcf_pdata = {
231 	.resumers = {
232 		[0] =	PCF50633_INT1_USBINS |
233 			PCF50633_INT1_USBREM |
234 			PCF50633_INT1_ALARM,
235 		[1] =	PCF50633_INT2_ONKEYF,
236 		[2] =	PCF50633_INT3_ONKEY1S,
237 		[3] =	PCF50633_INT4_LOWSYS |
238 			PCF50633_INT4_LOWBAT |
239 			PCF50633_INT4_HIGHTMP,
240 	},
241 
242 	.batteries = gta02_batteries,
243 	.num_batteries = ARRAY_SIZE(gta02_batteries),
244 
245 	.charger_reference_current_ma = 1000,
246 
247 	.backlight_data = &gta02_backlight_data,
248 
249 	.reg_init_data = {
250 		[PCF50633_REGULATOR_AUTO] = {
251 			.constraints = {
252 				.min_uV = 3300000,
253 				.max_uV = 3300000,
254 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
255 				.always_on = 1,
256 				.apply_uV = 1,
257 			},
258 		},
259 		[PCF50633_REGULATOR_DOWN1] = {
260 			.constraints = {
261 				.min_uV = 1300000,
262 				.max_uV = 1600000,
263 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
264 				.always_on = 1,
265 				.apply_uV = 1,
266 			},
267 		},
268 		[PCF50633_REGULATOR_DOWN2] = {
269 			.constraints = {
270 				.min_uV = 1800000,
271 				.max_uV = 1800000,
272 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
273 				.apply_uV = 1,
274 				.always_on = 1,
275 			},
276 		},
277 		[PCF50633_REGULATOR_HCLDO] = {
278 			.constraints = {
279 				.min_uV = 2000000,
280 				.max_uV = 3300000,
281 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
282 				.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
283 						REGULATOR_CHANGE_STATUS,
284 			},
285 		},
286 		[PCF50633_REGULATOR_LDO1] = {
287 			.constraints = {
288 				.min_uV = 3300000,
289 				.max_uV = 3300000,
290 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
291 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
292 				.apply_uV = 1,
293 			},
294 		},
295 		[PCF50633_REGULATOR_LDO2] = {
296 			.constraints = {
297 				.min_uV = 3300000,
298 				.max_uV = 3300000,
299 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
300 				.apply_uV = 1,
301 			},
302 		},
303 		[PCF50633_REGULATOR_LDO3] = {
304 			.constraints = {
305 				.min_uV = 3000000,
306 				.max_uV = 3000000,
307 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
308 				.apply_uV = 1,
309 			},
310 		},
311 		[PCF50633_REGULATOR_LDO4] = {
312 			.constraints = {
313 				.min_uV = 3200000,
314 				.max_uV = 3200000,
315 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
316 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
317 				.apply_uV = 1,
318 			},
319 		},
320 		[PCF50633_REGULATOR_LDO5] = {
321 			.constraints = {
322 				.min_uV = 3000000,
323 				.max_uV = 3000000,
324 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
325 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
326 				.apply_uV = 1,
327 			},
328 		},
329 		[PCF50633_REGULATOR_LDO6] = {
330 			.constraints = {
331 				.min_uV = 3000000,
332 				.max_uV = 3000000,
333 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
334 			},
335 		},
336 		[PCF50633_REGULATOR_MEMLDO] = {
337 			.constraints = {
338 				.min_uV = 1800000,
339 				.max_uV = 1800000,
340 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
341 			},
342 		},
343 
344 	},
345 	.mbc_event_callback = gta02_pmu_event_callback,
346 };
347 
348 
349 /* NOR Flash. */
350 
351 #define GTA02_FLASH_BASE	0x18000000 /* GCS3 */
352 #define GTA02_FLASH_SIZE	0x200000 /* 2MBytes */
353 
354 static struct physmap_flash_data gta02_nor_flash_data = {
355 	.width		= 2,
356 };
357 
358 static struct resource gta02_nor_flash_resource =
359 	DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
360 
361 static struct platform_device gta02_nor_flash = {
362 	.name		= "physmap-flash",
363 	.id		= 0,
364 	.dev		= {
365 		.platform_data	= &gta02_nor_flash_data,
366 	},
367 	.resource	= &gta02_nor_flash_resource,
368 	.num_resources	= 1,
369 };
370 
371 
372 static struct platform_device s3c24xx_pwm_device = {
373 	.name		= "s3c24xx_pwm",
374 	.num_resources	= 0,
375 };
376 
377 static struct platform_device gta02_dfbmcs320_device = {
378 	.name = "dfbmcs320",
379 };
380 
381 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
382 	{
383 		I2C_BOARD_INFO("pcf50633", 0x73),
384 		.irq = GTA02_IRQ_PCF50633,
385 		.platform_data = &gta02_pcf_pdata,
386 	},
387 	{
388 		I2C_BOARD_INFO("wm8753", 0x1a),
389 	},
390 };
391 
392 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
393 	[0] = {
394 		/*
395 		 * This name is also hard-coded in the boot loaders, so
396 		 * changing it would would require all users to upgrade
397 		 * their boot loaders, some of which are stored in a NOR
398 		 * that is considered to be immutable.
399 		 */
400 		.name		= "neo1973-nand",
401 		.nr_chips	= 1,
402 		.flash_bbt	= 1,
403 	},
404 };
405 
406 /*
407  * Choose a set of timings derived from S3C@2442B MCP54
408  * data sheet (K5D2G13ACM-D075 MCP Memory).
409  */
410 
411 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
412 	.tacls		= 0,
413 	.twrph0		= 25,
414 	.twrph1		= 15,
415 	.nr_sets	= ARRAY_SIZE(gta02_nand_sets),
416 	.sets		= gta02_nand_sets,
417 	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
418 };
419 
420 
421 /* Get PMU to set USB current limit accordingly. */
422 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
423 	.vbus_draw	= gta02_udc_vbus_draw,
424 	.pullup_pin = GTA02_GPIO_USB_PULLUP,
425 };
426 
427 /* USB */
428 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
429 	.port[0]	= {
430 		.flags	= S3C_HCDFLG_USED,
431 	},
432 	.port[1]	= {
433 		.flags	= 0,
434 	},
435 };
436 
437 /* Touchscreen */
438 static struct s3c2410_ts_mach_info gta02_ts_info = {
439 	.delay			= 10000,
440 	.presc			= 0xff, /* slow as we can go */
441 	.oversampling_shift	= 2,
442 };
443 
444 /* Buttons */
445 static struct gpio_keys_button gta02_buttons[] = {
446 	{
447 		.gpio = GTA02_GPIO_AUX_KEY,
448 		.code = KEY_PHONE,
449 		.desc = "Aux",
450 		.type = EV_KEY,
451 		.debounce_interval = 100,
452 	},
453 	{
454 		.gpio = GTA02_GPIO_HOLD_KEY,
455 		.code = KEY_PAUSE,
456 		.desc = "Hold",
457 		.type = EV_KEY,
458 		.debounce_interval = 100,
459 	},
460 };
461 
462 static struct gpio_keys_platform_data gta02_buttons_pdata = {
463 	.buttons = gta02_buttons,
464 	.nbuttons = ARRAY_SIZE(gta02_buttons),
465 };
466 
467 static struct platform_device gta02_buttons_device = {
468 	.name = "gpio-keys",
469 	.id = -1,
470 	.dev = {
471 		.platform_data = &gta02_buttons_pdata,
472 	},
473 };
474 
475 static struct gpiod_lookup_table gta02_audio_gpio_table = {
476 	.dev_id = "neo1973-audio",
477 	.table = {
478 		GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
479 		GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
480 		{ },
481 	},
482 };
483 
484 static struct platform_device gta02_audio = {
485 	.name = "neo1973-audio",
486 	.id = -1,
487 };
488 
489 static struct gpiod_lookup_table gta02_mmc_gpio_table = {
490 	.dev_id = "s3c2410-sdi",
491 	.table = {
492 		/* bus pins */
493 		GPIO_LOOKUP_IDX("GPIOE",  5, "bus", 0, GPIO_ACTIVE_HIGH),
494 		GPIO_LOOKUP_IDX("GPIOE",  6, "bus", 1, GPIO_ACTIVE_HIGH),
495 		GPIO_LOOKUP_IDX("GPIOE",  7, "bus", 2, GPIO_ACTIVE_HIGH),
496 		GPIO_LOOKUP_IDX("GPIOE",  8, "bus", 3, GPIO_ACTIVE_HIGH),
497 		GPIO_LOOKUP_IDX("GPIOE",  9, "bus", 4, GPIO_ACTIVE_HIGH),
498 		GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
499 		{ },
500 	},
501 };
502 
gta02_map_io(void)503 static void __init gta02_map_io(void)
504 {
505 	s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
506 	s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
507 	s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
508 }
509 
510 
511 /* These are the guys that don't need to be children of PMU. */
512 
513 static struct platform_device *gta02_devices[] __initdata = {
514 	&s3c_device_ohci,
515 	&s3c_device_wdt,
516 	&s3c_device_sdi,
517 	&s3c_device_usbgadget,
518 	&s3c_device_nand,
519 	&gta02_nor_flash,
520 	&s3c24xx_pwm_device,
521 	&s3c_device_iis,
522 	&s3c_device_i2c0,
523 	&gta02_dfbmcs320_device,
524 	&gta02_buttons_device,
525 	&s3c_device_adc,
526 	&s3c_device_ts,
527 	&gta02_audio,
528 };
529 
gta02_poweroff(void)530 static void gta02_poweroff(void)
531 {
532 	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
533 }
534 
gta02_machine_init(void)535 static void __init gta02_machine_init(void)
536 {
537 	/* Set the panic callback to turn AUX LED on or off. */
538 	panic_blink = gta02_panic_blink;
539 
540 	s3c_pm_init();
541 
542 #ifdef CONFIG_CHARGER_PCF50633
543 	INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
544 #endif
545 
546 	s3c24xx_udc_set_platdata(&gta02_udc_cfg);
547 	s3c24xx_ts_set_platdata(&gta02_ts_info);
548 	s3c_ohci_set_platdata(&gta02_usb_info);
549 	s3c_nand_set_platdata(&gta02_nand_info);
550 	s3c_i2c0_set_platdata(NULL);
551 
552 	i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
553 
554 	/* Configure the I2S pins (GPE0...GPE4) in correct mode */
555 	s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
556 			      S3C_GPIO_PULL_NONE);
557 
558 	gpiod_add_lookup_table(&gta02_audio_gpio_table);
559 	gpiod_add_lookup_table(&gta02_mmc_gpio_table);
560 	platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
561 	pm_power_off = gta02_poweroff;
562 
563 	regulator_has_full_constraints();
564 }
565 
gta02_init_time(void)566 static void __init gta02_init_time(void)
567 {
568 	s3c2442_init_clocks(12000000);
569 	s3c24xx_timer_init();
570 }
571 
572 MACHINE_START(NEO1973_GTA02, "GTA02")
573 	/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
574 	.atag_offset	= 0x100,
575 	.map_io		= gta02_map_io,
576 	.init_irq	= s3c2442_init_irq,
577 	.init_machine	= gta02_machine_init,
578 	.init_time	= gta02_init_time,
579 MACHINE_END
580