1/*
2 * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
3 *
4 * Copyright (C) 2006-2009 by Openmoko, Inc.
5 * Authors: Harald Welte <laforge@openmoko.org>
6 *          Andy Green <andy@openmoko.org>
7 *          Werner Almesberger <werner@openmoko.org>
8 * All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
26#include <linux/kernel.h>
27#include <linux/types.h>
28#include <linux/interrupt.h>
29#include <linux/list.h>
30#include <linux/delay.h>
31#include <linux/timer.h>
32#include <linux/init.h>
33#include <linux/gpio.h>
34#include <linux/gpio_keys.h>
35#include <linux/workqueue.h>
36#include <linux/platform_device.h>
37#include <linux/serial_core.h>
38#include <linux/serial_s3c.h>
39#include <linux/input.h>
40#include <linux/io.h>
41#include <linux/i2c.h>
42
43#include <linux/mmc/host.h>
44
45#include <linux/mfd/pcf50633/adc.h>
46#include <linux/mfd/pcf50633/backlight.h>
47#include <linux/mfd/pcf50633/core.h>
48#include <linux/mfd/pcf50633/gpio.h>
49#include <linux/mfd/pcf50633/mbc.h>
50#include <linux/mfd/pcf50633/pmic.h>
51
52#include <linux/mtd/mtd.h>
53#include <linux/mtd/nand.h>
54#include <linux/mtd/nand_ecc.h>
55#include <linux/mtd/partitions.h>
56#include <linux/mtd/physmap.h>
57
58#include <linux/regulator/machine.h>
59
60#include <linux/spi/spi.h>
61#include <linux/spi/s3c24xx.h>
62
63#include <asm/irq.h>
64#include <asm/mach-types.h>
65#include <asm/mach/arch.h>
66#include <asm/mach/map.h>
67#include <asm/mach/irq.h>
68
69#include <linux/platform_data/i2c-s3c2410.h>
70#include <linux/platform_data/mtd-nand-s3c2410.h>
71#include <linux/platform_data/touchscreen-s3c2410.h>
72#include <linux/platform_data/usb-ohci-s3c2410.h>
73#include <linux/platform_data/usb-s3c2410_udc.h>
74
75#include <mach/fb.h>
76#include <mach/hardware.h>
77#include <mach/regs-gpio.h>
78#include <mach/regs-irq.h>
79#include <mach/gpio-samsung.h>
80
81#include <plat/cpu.h>
82#include <plat/devs.h>
83#include <plat/gpio-cfg.h>
84#include <plat/pm.h>
85#include <plat/samsung-time.h>
86
87#include "common.h"
88#include "gta02.h"
89
90static struct pcf50633 *gta02_pcf;
91
92/*
93 * This gets called frequently when we paniced.
94 */
95
96static long gta02_panic_blink(int state)
97{
98	long delay = 0;
99	char led;
100
101	led = (state) ? 1 : 0;
102	gpio_direction_output(GTA02_GPIO_AUX_LED, led);
103
104	return delay;
105}
106
107
108static struct map_desc gta02_iodesc[] __initdata = {
109	{
110		.virtual	= 0xe0000000,
111		.pfn		= __phys_to_pfn(S3C2410_CS3 + 0x01000000),
112		.length		= SZ_1M,
113		.type		= MT_DEVICE
114	},
115};
116
117#define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
118#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
119#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
120
121static struct s3c2410_uartcfg gta02_uartcfgs[] = {
122	[0] = {
123		.hwport		= 0,
124		.flags		= 0,
125		.ucon		= UCON,
126		.ulcon		= ULCON,
127		.ufcon		= UFCON,
128	},
129	[1] = {
130		.hwport		= 1,
131		.flags		= 0,
132		.ucon		= UCON,
133		.ulcon		= ULCON,
134		.ufcon		= UFCON,
135	},
136	[2] = {
137		.hwport		= 2,
138		.flags		= 0,
139		.ucon		= UCON,
140		.ulcon		= ULCON,
141		.ufcon		= UFCON,
142	},
143};
144
145#ifdef CONFIG_CHARGER_PCF50633
146/*
147 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
148 * We use this to recognize that we can pull 1A from the USB socket.
149 *
150 * These constants are the measured pcf50633 ADC levels with the 1A
151 * charger / 48K resistor, and with no pulldown resistor.
152 */
153
154#define ADC_NOM_CHG_DETECT_1A 6
155#define ADC_NOM_CHG_DETECT_USB 43
156
157static void
158gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
159{
160	int  ma;
161
162	/* Interpret charger type */
163	if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
164
165		/*
166		 * Sanity - stop GPO driving out now that we have a 1A charger
167		 * GPO controls USB Host power generation on GTA02
168		 */
169		pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
170
171		ma = 1000;
172	} else
173		ma = 100;
174
175	pcf50633_mbc_usb_curlim_set(pcf, ma);
176}
177
178static struct delayed_work gta02_charger_work;
179static int gta02_usb_vbus_draw;
180
181static void gta02_charger_worker(struct work_struct *work)
182{
183	if (gta02_usb_vbus_draw) {
184		pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
185		return;
186	}
187
188#ifdef CONFIG_PCF50633_ADC
189	pcf50633_adc_async_read(gta02_pcf,
190				PCF50633_ADCC1_MUX_ADCIN1,
191				PCF50633_ADCC1_AVERAGE_16,
192				gta02_configure_pmu_for_charger,
193				NULL);
194#else
195	/*
196	 * If the PCF50633 ADC is disabled we fallback to a
197	 * 100mA limit for safety.
198	 */
199	pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
200#endif
201}
202
203#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
204
205static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
206{
207	if (irq == PCF50633_IRQ_USBINS) {
208		schedule_delayed_work(&gta02_charger_work,
209				      GTA02_CHARGER_CONFIGURE_TIMEOUT);
210
211		return;
212	}
213
214	if (irq == PCF50633_IRQ_USBREM) {
215		cancel_delayed_work_sync(&gta02_charger_work);
216		gta02_usb_vbus_draw = 0;
217	}
218}
219
220static void gta02_udc_vbus_draw(unsigned int ma)
221{
222	if (!gta02_pcf)
223		return;
224
225	gta02_usb_vbus_draw = ma;
226
227	schedule_delayed_work(&gta02_charger_work,
228			      GTA02_CHARGER_CONFIGURE_TIMEOUT);
229}
230#else /* !CONFIG_CHARGER_PCF50633 */
231#define gta02_pmu_event_callback	NULL
232#define gta02_udc_vbus_draw		NULL
233#endif
234
235/*
236 * This is called when pc50633 is probed, unfortunately quite late in the
237 * day since it is an I2C bus device. Here we can belatedly define some
238 * platform devices with the advantage that we can mark the pcf50633 as the
239 * parent. This makes them get suspended and resumed with their parent
240 * the pcf50633 still around.
241 */
242
243static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
244
245
246static char *gta02_batteries[] = {
247	"battery",
248};
249
250static struct pcf50633_bl_platform_data gta02_backlight_data = {
251	.default_brightness = 0x3f,
252	.default_brightness_limit = 0,
253	.ramp_time = 5,
254};
255
256static struct pcf50633_platform_data gta02_pcf_pdata = {
257	.resumers = {
258		[0] =	PCF50633_INT1_USBINS |
259			PCF50633_INT1_USBREM |
260			PCF50633_INT1_ALARM,
261		[1] =	PCF50633_INT2_ONKEYF,
262		[2] =	PCF50633_INT3_ONKEY1S,
263		[3] =	PCF50633_INT4_LOWSYS |
264			PCF50633_INT4_LOWBAT |
265			PCF50633_INT4_HIGHTMP,
266	},
267
268	.batteries = gta02_batteries,
269	.num_batteries = ARRAY_SIZE(gta02_batteries),
270
271	.charger_reference_current_ma = 1000,
272
273	.backlight_data = &gta02_backlight_data,
274
275	.reg_init_data = {
276		[PCF50633_REGULATOR_AUTO] = {
277			.constraints = {
278				.min_uV = 3300000,
279				.max_uV = 3300000,
280				.valid_modes_mask = REGULATOR_MODE_NORMAL,
281				.always_on = 1,
282				.apply_uV = 1,
283			},
284		},
285		[PCF50633_REGULATOR_DOWN1] = {
286			.constraints = {
287				.min_uV = 1300000,
288				.max_uV = 1600000,
289				.valid_modes_mask = REGULATOR_MODE_NORMAL,
290				.always_on = 1,
291				.apply_uV = 1,
292			},
293		},
294		[PCF50633_REGULATOR_DOWN2] = {
295			.constraints = {
296				.min_uV = 1800000,
297				.max_uV = 1800000,
298				.valid_modes_mask = REGULATOR_MODE_NORMAL,
299				.apply_uV = 1,
300				.always_on = 1,
301			},
302		},
303		[PCF50633_REGULATOR_HCLDO] = {
304			.constraints = {
305				.min_uV = 2000000,
306				.max_uV = 3300000,
307				.valid_modes_mask = REGULATOR_MODE_NORMAL,
308				.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
309						REGULATOR_CHANGE_STATUS,
310			},
311		},
312		[PCF50633_REGULATOR_LDO1] = {
313			.constraints = {
314				.min_uV = 3300000,
315				.max_uV = 3300000,
316				.valid_modes_mask = REGULATOR_MODE_NORMAL,
317				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
318				.apply_uV = 1,
319			},
320		},
321		[PCF50633_REGULATOR_LDO2] = {
322			.constraints = {
323				.min_uV = 3300000,
324				.max_uV = 3300000,
325				.valid_modes_mask = REGULATOR_MODE_NORMAL,
326				.apply_uV = 1,
327			},
328		},
329		[PCF50633_REGULATOR_LDO3] = {
330			.constraints = {
331				.min_uV = 3000000,
332				.max_uV = 3000000,
333				.valid_modes_mask = REGULATOR_MODE_NORMAL,
334				.apply_uV = 1,
335			},
336		},
337		[PCF50633_REGULATOR_LDO4] = {
338			.constraints = {
339				.min_uV = 3200000,
340				.max_uV = 3200000,
341				.valid_modes_mask = REGULATOR_MODE_NORMAL,
342				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
343				.apply_uV = 1,
344			},
345		},
346		[PCF50633_REGULATOR_LDO5] = {
347			.constraints = {
348				.min_uV = 3000000,
349				.max_uV = 3000000,
350				.valid_modes_mask = REGULATOR_MODE_NORMAL,
351				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
352				.apply_uV = 1,
353			},
354		},
355		[PCF50633_REGULATOR_LDO6] = {
356			.constraints = {
357				.min_uV = 3000000,
358				.max_uV = 3000000,
359				.valid_modes_mask = REGULATOR_MODE_NORMAL,
360			},
361		},
362		[PCF50633_REGULATOR_MEMLDO] = {
363			.constraints = {
364				.min_uV = 1800000,
365				.max_uV = 1800000,
366				.valid_modes_mask = REGULATOR_MODE_NORMAL,
367			},
368		},
369
370	},
371	.probe_done = gta02_pmu_attach_child_devices,
372	.mbc_event_callback = gta02_pmu_event_callback,
373};
374
375
376/* NOR Flash. */
377
378#define GTA02_FLASH_BASE	0x18000000 /* GCS3 */
379#define GTA02_FLASH_SIZE	0x200000 /* 2MBytes */
380
381static struct physmap_flash_data gta02_nor_flash_data = {
382	.width		= 2,
383};
384
385static struct resource gta02_nor_flash_resource =
386	DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
387
388static struct platform_device gta02_nor_flash = {
389	.name		= "physmap-flash",
390	.id		= 0,
391	.dev		= {
392		.platform_data	= &gta02_nor_flash_data,
393	},
394	.resource	= &gta02_nor_flash_resource,
395	.num_resources	= 1,
396};
397
398
399static struct platform_device s3c24xx_pwm_device = {
400	.name		= "s3c24xx_pwm",
401	.num_resources	= 0,
402};
403
404static struct platform_device gta02_dfbmcs320_device = {
405	.name = "dfbmcs320",
406};
407
408static struct i2c_board_info gta02_i2c_devs[] __initdata = {
409	{
410		I2C_BOARD_INFO("pcf50633", 0x73),
411		.irq = GTA02_IRQ_PCF50633,
412		.platform_data = &gta02_pcf_pdata,
413	},
414	{
415		I2C_BOARD_INFO("wm8753", 0x1a),
416	},
417};
418
419static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
420	[0] = {
421		/*
422		 * This name is also hard-coded in the boot loaders, so
423		 * changing it would would require all users to upgrade
424		 * their boot loaders, some of which are stored in a NOR
425		 * that is considered to be immutable.
426		 */
427		.name		= "neo1973-nand",
428		.nr_chips	= 1,
429		.flash_bbt	= 1,
430	},
431};
432
433/*
434 * Choose a set of timings derived from S3C@2442B MCP54
435 * data sheet (K5D2G13ACM-D075 MCP Memory).
436 */
437
438static struct s3c2410_platform_nand __initdata gta02_nand_info = {
439	.tacls		= 0,
440	.twrph0		= 25,
441	.twrph1		= 15,
442	.nr_sets	= ARRAY_SIZE(gta02_nand_sets),
443	.sets		= gta02_nand_sets,
444};
445
446
447/* Get PMU to set USB current limit accordingly. */
448static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
449	.vbus_draw	= gta02_udc_vbus_draw,
450	.pullup_pin = GTA02_GPIO_USB_PULLUP,
451};
452
453/* USB */
454static struct s3c2410_hcd_info gta02_usb_info __initdata = {
455	.port[0]	= {
456		.flags	= S3C_HCDFLG_USED,
457	},
458	.port[1]	= {
459		.flags	= 0,
460	},
461};
462
463/* Touchscreen */
464static struct s3c2410_ts_mach_info gta02_ts_info = {
465	.delay			= 10000,
466	.presc			= 0xff, /* slow as we can go */
467	.oversampling_shift	= 2,
468};
469
470/* Buttons */
471static struct gpio_keys_button gta02_buttons[] = {
472	{
473		.gpio = GTA02_GPIO_AUX_KEY,
474		.code = KEY_PHONE,
475		.desc = "Aux",
476		.type = EV_KEY,
477		.debounce_interval = 100,
478	},
479	{
480		.gpio = GTA02_GPIO_HOLD_KEY,
481		.code = KEY_PAUSE,
482		.desc = "Hold",
483		.type = EV_KEY,
484		.debounce_interval = 100,
485	},
486};
487
488static struct gpio_keys_platform_data gta02_buttons_pdata = {
489	.buttons = gta02_buttons,
490	.nbuttons = ARRAY_SIZE(gta02_buttons),
491};
492
493static struct platform_device gta02_buttons_device = {
494	.name = "gpio-keys",
495	.id = -1,
496	.dev = {
497		.platform_data = &gta02_buttons_pdata,
498	},
499};
500
501static void __init gta02_map_io(void)
502{
503	s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
504	s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
505	samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
506}
507
508
509/* These are the guys that don't need to be children of PMU. */
510
511static struct platform_device *gta02_devices[] __initdata = {
512	&s3c_device_ohci,
513	&s3c_device_wdt,
514	&s3c_device_sdi,
515	&s3c_device_usbgadget,
516	&s3c_device_nand,
517	&gta02_nor_flash,
518	&s3c24xx_pwm_device,
519	&s3c_device_iis,
520	&s3c_device_i2c0,
521	&gta02_dfbmcs320_device,
522	&gta02_buttons_device,
523	&s3c_device_adc,
524	&s3c_device_ts,
525};
526
527/* These guys DO need to be children of PMU. */
528
529static struct platform_device *gta02_devices_pmu_children[] = {
530};
531
532
533/*
534 * This is called when pc50633 is probed, quite late in the day since it is an
535 * I2C bus device.  Here we can define platform devices with the advantage that
536 * we can mark the pcf50633 as the parent.  This makes them get suspended and
537 * resumed with their parent the pcf50633 still around.  All devices whose
538 * operation depends on something from pcf50633 must have this relationship
539 * made explicit like this, or suspend and resume will become an unreliable
540 * hellworld.
541 */
542
543static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
544{
545	int n;
546
547	/* Grab a copy of the now probed PMU pointer. */
548	gta02_pcf = pcf;
549
550	for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
551		gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
552
553	platform_add_devices(gta02_devices_pmu_children,
554			     ARRAY_SIZE(gta02_devices_pmu_children));
555}
556
557static void gta02_poweroff(void)
558{
559	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
560}
561
562static void __init gta02_machine_init(void)
563{
564	/* Set the panic callback to turn AUX LED on or off. */
565	panic_blink = gta02_panic_blink;
566
567	s3c_pm_init();
568
569#ifdef CONFIG_CHARGER_PCF50633
570	INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
571#endif
572
573	s3c24xx_udc_set_platdata(&gta02_udc_cfg);
574	s3c24xx_ts_set_platdata(&gta02_ts_info);
575	s3c_ohci_set_platdata(&gta02_usb_info);
576	s3c_nand_set_platdata(&gta02_nand_info);
577	s3c_i2c0_set_platdata(NULL);
578
579	i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
580
581	platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
582	pm_power_off = gta02_poweroff;
583
584	regulator_has_full_constraints();
585}
586
587static void __init gta02_init_time(void)
588{
589	s3c2442_init_clocks(12000000);
590	samsung_timer_init();
591}
592
593MACHINE_START(NEO1973_GTA02, "GTA02")
594	/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
595	.atag_offset	= 0x100,
596	.map_io		= gta02_map_io,
597	.init_irq	= s3c2442_init_irq,
598	.init_machine	= gta02_machine_init,
599	.init_time	= gta02_init_time,
600MACHINE_END
601