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.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
74static struct pcf50633 *gta02_pcf;
75
76/*
77 * This gets called frequently when we paniced.
78 */
79
80static long gta02_panic_blink(int state)
81{
82	long delay = 0;
83	char led;
84
85	led = (state) ? 1 : 0;
86	gpio_direction_output(GTA02_GPIO_AUX_LED, led);
87
88	return delay;
89}
90
91
92static struct map_desc gta02_iodesc[] __initdata = {
93	{
94		.virtual	= 0xe0000000,
95		.pfn		= __phys_to_pfn(S3C2410_CS3 + 0x01000000),
96		.length		= SZ_1M,
97		.type		= MT_DEVICE
98	},
99};
100
101#define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
102#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
103#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
104
105static struct s3c2410_uartcfg gta02_uartcfgs[] = {
106	[0] = {
107		.hwport		= 0,
108		.flags		= 0,
109		.ucon		= UCON,
110		.ulcon		= ULCON,
111		.ufcon		= UFCON,
112	},
113	[1] = {
114		.hwport		= 1,
115		.flags		= 0,
116		.ucon		= UCON,
117		.ulcon		= ULCON,
118		.ufcon		= UFCON,
119	},
120	[2] = {
121		.hwport		= 2,
122		.flags		= 0,
123		.ucon		= UCON,
124		.ulcon		= ULCON,
125		.ufcon		= UFCON,
126	},
127};
128
129#ifdef CONFIG_CHARGER_PCF50633
130/*
131 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
132 * We use this to recognize that we can pull 1A from the USB socket.
133 *
134 * These constants are the measured pcf50633 ADC levels with the 1A
135 * charger / 48K resistor, and with no pulldown resistor.
136 */
137
138#define ADC_NOM_CHG_DETECT_1A 6
139#define ADC_NOM_CHG_DETECT_USB 43
140
141#ifdef CONFIG_PCF50633_ADC
142static void
143gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
144{
145	int  ma;
146
147	/* Interpret charger type */
148	if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
149
150		/*
151		 * Sanity - stop GPO driving out now that we have a 1A charger
152		 * GPO controls USB Host power generation on GTA02
153		 */
154		pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
155
156		ma = 1000;
157	} else
158		ma = 100;
159
160	pcf50633_mbc_usb_curlim_set(pcf, ma);
161}
162#endif
163
164static struct delayed_work gta02_charger_work;
165static int gta02_usb_vbus_draw;
166
167static void gta02_charger_worker(struct work_struct *work)
168{
169	if (gta02_usb_vbus_draw) {
170		pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
171		return;
172	}
173
174#ifdef CONFIG_PCF50633_ADC
175	pcf50633_adc_async_read(gta02_pcf,
176				PCF50633_ADCC1_MUX_ADCIN1,
177				PCF50633_ADCC1_AVERAGE_16,
178				gta02_configure_pmu_for_charger,
179				NULL);
180#else
181	/*
182	 * If the PCF50633 ADC is disabled we fallback to a
183	 * 100mA limit for safety.
184	 */
185	pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
186#endif
187}
188
189#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
190
191static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
192{
193	if (irq == PCF50633_IRQ_USBINS) {
194		schedule_delayed_work(&gta02_charger_work,
195				      GTA02_CHARGER_CONFIGURE_TIMEOUT);
196
197		return;
198	}
199
200	if (irq == PCF50633_IRQ_USBREM) {
201		cancel_delayed_work_sync(&gta02_charger_work);
202		gta02_usb_vbus_draw = 0;
203	}
204}
205
206static void gta02_udc_vbus_draw(unsigned int ma)
207{
208	if (!gta02_pcf)
209		return;
210
211	gta02_usb_vbus_draw = ma;
212
213	schedule_delayed_work(&gta02_charger_work,
214			      GTA02_CHARGER_CONFIGURE_TIMEOUT);
215}
216#else /* !CONFIG_CHARGER_PCF50633 */
217#define gta02_pmu_event_callback	NULL
218#define gta02_udc_vbus_draw		NULL
219#endif
220
221static char *gta02_batteries[] = {
222	"battery",
223};
224
225static struct pcf50633_bl_platform_data gta02_backlight_data = {
226	.default_brightness = 0x3f,
227	.default_brightness_limit = 0,
228	.ramp_time = 5,
229};
230
231static struct pcf50633_platform_data gta02_pcf_pdata = {
232	.resumers = {
233		[0] =	PCF50633_INT1_USBINS |
234			PCF50633_INT1_USBREM |
235			PCF50633_INT1_ALARM,
236		[1] =	PCF50633_INT2_ONKEYF,
237		[2] =	PCF50633_INT3_ONKEY1S,
238		[3] =	PCF50633_INT4_LOWSYS |
239			PCF50633_INT4_LOWBAT |
240			PCF50633_INT4_HIGHTMP,
241	},
242
243	.batteries = gta02_batteries,
244	.num_batteries = ARRAY_SIZE(gta02_batteries),
245
246	.charger_reference_current_ma = 1000,
247
248	.backlight_data = &gta02_backlight_data,
249
250	.reg_init_data = {
251		[PCF50633_REGULATOR_AUTO] = {
252			.constraints = {
253				.min_uV = 3300000,
254				.max_uV = 3300000,
255				.valid_modes_mask = REGULATOR_MODE_NORMAL,
256				.always_on = 1,
257				.apply_uV = 1,
258			},
259		},
260		[PCF50633_REGULATOR_DOWN1] = {
261			.constraints = {
262				.min_uV = 1300000,
263				.max_uV = 1600000,
264				.valid_modes_mask = REGULATOR_MODE_NORMAL,
265				.always_on = 1,
266				.apply_uV = 1,
267			},
268		},
269		[PCF50633_REGULATOR_DOWN2] = {
270			.constraints = {
271				.min_uV = 1800000,
272				.max_uV = 1800000,
273				.valid_modes_mask = REGULATOR_MODE_NORMAL,
274				.apply_uV = 1,
275				.always_on = 1,
276			},
277		},
278		[PCF50633_REGULATOR_HCLDO] = {
279			.constraints = {
280				.min_uV = 2000000,
281				.max_uV = 3300000,
282				.valid_modes_mask = REGULATOR_MODE_NORMAL,
283				.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
284						REGULATOR_CHANGE_STATUS,
285			},
286		},
287		[PCF50633_REGULATOR_LDO1] = {
288			.constraints = {
289				.min_uV = 3300000,
290				.max_uV = 3300000,
291				.valid_modes_mask = REGULATOR_MODE_NORMAL,
292				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
293				.apply_uV = 1,
294			},
295		},
296		[PCF50633_REGULATOR_LDO2] = {
297			.constraints = {
298				.min_uV = 3300000,
299				.max_uV = 3300000,
300				.valid_modes_mask = REGULATOR_MODE_NORMAL,
301				.apply_uV = 1,
302			},
303		},
304		[PCF50633_REGULATOR_LDO3] = {
305			.constraints = {
306				.min_uV = 3000000,
307				.max_uV = 3000000,
308				.valid_modes_mask = REGULATOR_MODE_NORMAL,
309				.apply_uV = 1,
310			},
311		},
312		[PCF50633_REGULATOR_LDO4] = {
313			.constraints = {
314				.min_uV = 3200000,
315				.max_uV = 3200000,
316				.valid_modes_mask = REGULATOR_MODE_NORMAL,
317				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
318				.apply_uV = 1,
319			},
320		},
321		[PCF50633_REGULATOR_LDO5] = {
322			.constraints = {
323				.min_uV = 3000000,
324				.max_uV = 3000000,
325				.valid_modes_mask = REGULATOR_MODE_NORMAL,
326				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
327				.apply_uV = 1,
328			},
329		},
330		[PCF50633_REGULATOR_LDO6] = {
331			.constraints = {
332				.min_uV = 3000000,
333				.max_uV = 3000000,
334				.valid_modes_mask = REGULATOR_MODE_NORMAL,
335			},
336		},
337		[PCF50633_REGULATOR_MEMLDO] = {
338			.constraints = {
339				.min_uV = 1800000,
340				.max_uV = 1800000,
341				.valid_modes_mask = REGULATOR_MODE_NORMAL,
342			},
343		},
344
345	},
346	.mbc_event_callback = gta02_pmu_event_callback,
347};
348
349
350/* NOR Flash. */
351
352#define GTA02_FLASH_BASE	0x18000000 /* GCS3 */
353#define GTA02_FLASH_SIZE	0x200000 /* 2MBytes */
354
355static struct physmap_flash_data gta02_nor_flash_data = {
356	.width		= 2,
357};
358
359static struct resource gta02_nor_flash_resource =
360	DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
361
362static struct platform_device gta02_nor_flash = {
363	.name		= "physmap-flash",
364	.id		= 0,
365	.dev		= {
366		.platform_data	= &gta02_nor_flash_data,
367	},
368	.resource	= &gta02_nor_flash_resource,
369	.num_resources	= 1,
370};
371
372
373static struct platform_device s3c24xx_pwm_device = {
374	.name		= "s3c24xx_pwm",
375	.num_resources	= 0,
376};
377
378static struct platform_device gta02_dfbmcs320_device = {
379	.name = "dfbmcs320",
380};
381
382static struct i2c_board_info gta02_i2c_devs[] __initdata = {
383	{
384		I2C_BOARD_INFO("pcf50633", 0x73),
385		.irq = GTA02_IRQ_PCF50633,
386		.platform_data = &gta02_pcf_pdata,
387	},
388	{
389		I2C_BOARD_INFO("wm8753", 0x1a),
390	},
391};
392
393static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
394	[0] = {
395		/*
396		 * This name is also hard-coded in the boot loaders, so
397		 * changing it would would require all users to upgrade
398		 * their boot loaders, some of which are stored in a NOR
399		 * that is considered to be immutable.
400		 */
401		.name		= "neo1973-nand",
402		.nr_chips	= 1,
403		.flash_bbt	= 1,
404	},
405};
406
407/*
408 * Choose a set of timings derived from S3C@2442B MCP54
409 * data sheet (K5D2G13ACM-D075 MCP Memory).
410 */
411
412static struct s3c2410_platform_nand __initdata gta02_nand_info = {
413	.tacls		= 0,
414	.twrph0		= 25,
415	.twrph1		= 15,
416	.nr_sets	= ARRAY_SIZE(gta02_nand_sets),
417	.sets		= gta02_nand_sets,
418	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
419};
420
421
422/* Get PMU to set USB current limit accordingly. */
423static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
424	.vbus_draw	= gta02_udc_vbus_draw,
425	.pullup_pin = GTA02_GPIO_USB_PULLUP,
426};
427
428/* USB */
429static struct s3c2410_hcd_info gta02_usb_info __initdata = {
430	.port[0]	= {
431		.flags	= S3C_HCDFLG_USED,
432	},
433	.port[1]	= {
434		.flags	= 0,
435	},
436};
437
438/* Touchscreen */
439static struct s3c2410_ts_mach_info gta02_ts_info = {
440	.delay			= 10000,
441	.presc			= 0xff, /* slow as we can go */
442	.oversampling_shift	= 2,
443};
444
445/* Buttons */
446static struct gpio_keys_button gta02_buttons[] = {
447	{
448		.gpio = GTA02_GPIO_AUX_KEY,
449		.code = KEY_PHONE,
450		.desc = "Aux",
451		.type = EV_KEY,
452		.debounce_interval = 100,
453	},
454	{
455		.gpio = GTA02_GPIO_HOLD_KEY,
456		.code = KEY_PAUSE,
457		.desc = "Hold",
458		.type = EV_KEY,
459		.debounce_interval = 100,
460	},
461};
462
463static struct gpio_keys_platform_data gta02_buttons_pdata = {
464	.buttons = gta02_buttons,
465	.nbuttons = ARRAY_SIZE(gta02_buttons),
466};
467
468static struct platform_device gta02_buttons_device = {
469	.name = "gpio-keys",
470	.id = -1,
471	.dev = {
472		.platform_data = &gta02_buttons_pdata,
473	},
474};
475
476static struct gpiod_lookup_table gta02_audio_gpio_table = {
477	.dev_id = "neo1973-audio",
478	.table = {
479		GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
480		GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
481		{ },
482	},
483};
484
485static struct platform_device gta02_audio = {
486	.name = "neo1973-audio",
487	.id = -1,
488};
489
490static struct gpiod_lookup_table gta02_mmc_gpio_table = {
491	.dev_id = "s3c2410-sdi",
492	.table = {
493		/* bus pins */
494		GPIO_LOOKUP_IDX("GPIOE",  5, "bus", 0, GPIO_ACTIVE_HIGH),
495		GPIO_LOOKUP_IDX("GPIOE",  6, "bus", 1, GPIO_ACTIVE_HIGH),
496		GPIO_LOOKUP_IDX("GPIOE",  7, "bus", 2, GPIO_ACTIVE_HIGH),
497		GPIO_LOOKUP_IDX("GPIOE",  8, "bus", 3, GPIO_ACTIVE_HIGH),
498		GPIO_LOOKUP_IDX("GPIOE",  9, "bus", 4, GPIO_ACTIVE_HIGH),
499		GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
500		{ },
501	},
502};
503
504static void __init gta02_map_io(void)
505{
506	s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
507	s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
508	s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
509}
510
511
512/* These are the guys that don't need to be children of PMU. */
513
514static struct platform_device *gta02_devices[] __initdata = {
515	&s3c_device_ohci,
516	&s3c_device_wdt,
517	&s3c_device_sdi,
518	&s3c_device_usbgadget,
519	&s3c_device_nand,
520	&gta02_nor_flash,
521	&s3c24xx_pwm_device,
522	&s3c_device_iis,
523	&s3c_device_i2c0,
524	&gta02_dfbmcs320_device,
525	&gta02_buttons_device,
526	&s3c_device_adc,
527	&s3c_device_ts,
528	&gta02_audio,
529};
530
531static void gta02_poweroff(void)
532{
533	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
534}
535
536static void __init gta02_machine_init(void)
537{
538	/* Set the panic callback to turn AUX LED on or off. */
539	panic_blink = gta02_panic_blink;
540
541	s3c_pm_init();
542
543#ifdef CONFIG_CHARGER_PCF50633
544	INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
545#endif
546
547	s3c24xx_udc_set_platdata(&gta02_udc_cfg);
548	s3c24xx_ts_set_platdata(&gta02_ts_info);
549	s3c_ohci_set_platdata(&gta02_usb_info);
550	s3c_nand_set_platdata(&gta02_nand_info);
551	s3c_i2c0_set_platdata(NULL);
552
553	i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
554
555	/* Configure the I2S pins (GPE0...GPE4) in correct mode */
556	s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
557			      S3C_GPIO_PULL_NONE);
558
559	gpiod_add_lookup_table(&gta02_audio_gpio_table);
560	gpiod_add_lookup_table(&gta02_mmc_gpio_table);
561	platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
562	pm_power_off = gta02_poweroff;
563
564	regulator_has_full_constraints();
565}
566
567static void __init gta02_init_time(void)
568{
569	s3c2442_init_clocks(12000000);
570	s3c24xx_timer_init();
571}
572
573MACHINE_START(NEO1973_GTA02, "GTA02")
574	/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
575	.atag_offset	= 0x100,
576	.map_io		= gta02_map_io,
577	.init_irq	= s3c2442_init_irq,
578	.init_machine	= gta02_machine_init,
579	.init_time	= gta02_init_time,
580MACHINE_END
581