1/*
2 * linux/arch/arm/mach-s3c64xx/mach-smartq.c
3 *
4 * Copyright (C) 2010 Maurus Cuelenaere
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/delay.h>
13#include <linux/fb.h>
14#include <linux/gpio.h>
15#include <linux/init.h>
16#include <linux/platform_device.h>
17#include <linux/pwm_backlight.h>
18#include <linux/serial_core.h>
19#include <linux/serial_s3c.h>
20#include <linux/spi/spi_gpio.h>
21#include <linux/usb/gpio_vbus.h>
22#include <linux/platform_data/s3c-hsotg.h>
23
24#include <asm/mach-types.h>
25#include <asm/mach/map.h>
26
27#include <mach/map.h>
28#include <mach/regs-gpio.h>
29#include <mach/gpio-samsung.h>
30
31#include <plat/cpu.h>
32#include <plat/devs.h>
33#include <linux/platform_data/i2c-s3c2410.h>
34#include <plat/gpio-cfg.h>
35#include <linux/platform_data/hwmon-s3c.h>
36#include <linux/platform_data/usb-ohci-s3c2410.h>
37#include <plat/sdhci.h>
38#include <linux/platform_data/touchscreen-s3c2410.h>
39
40#include <video/platform_lcd.h>
41#include <plat/samsung-time.h>
42
43#include "common.h"
44#include "regs-modem.h"
45
46#define UCON S3C2410_UCON_DEFAULT
47#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
48#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
49
50static struct s3c2410_uartcfg smartq_uartcfgs[] __initdata = {
51	[0] = {
52		.hwport	     = 0,
53		.flags	     = 0,
54		.ucon	     = UCON,
55		.ulcon	     = ULCON,
56		.ufcon	     = UFCON,
57	},
58	[1] = {
59		.hwport	     = 1,
60		.flags	     = 0,
61		.ucon	     = UCON,
62		.ulcon	     = ULCON,
63		.ufcon	     = UFCON,
64	},
65	[2] = {
66		.hwport	     = 2,
67		.flags	     = 0,
68		.ucon	     = UCON,
69		.ulcon	     = ULCON,
70		.ufcon	     = UFCON,
71	},
72};
73
74static void smartq_usb_host_powercontrol(int port, int to)
75{
76	pr_debug("%s(%d, %d)\n", __func__, port, to);
77
78	if (port == 0) {
79		gpio_set_value(S3C64XX_GPL(0), to);
80		gpio_set_value(S3C64XX_GPL(1), to);
81	}
82}
83
84static irqreturn_t smartq_usb_host_ocirq(int irq, void *pw)
85{
86	struct s3c2410_hcd_info *info = pw;
87
88	if (gpio_get_value(S3C64XX_GPL(10)) == 0) {
89		pr_debug("%s: over-current irq (oc detected)\n", __func__);
90		s3c2410_usb_report_oc(info, 3);
91	} else {
92		pr_debug("%s: over-current irq (oc cleared)\n", __func__);
93		s3c2410_usb_report_oc(info, 0);
94	}
95
96	return IRQ_HANDLED;
97}
98
99static void smartq_usb_host_enableoc(struct s3c2410_hcd_info *info, int on)
100{
101	int ret;
102
103	/* This isn't present on a SmartQ 5 board */
104	if (machine_is_smartq5())
105		return;
106
107	if (on) {
108		ret = request_irq(gpio_to_irq(S3C64XX_GPL(10)),
109				  smartq_usb_host_ocirq,
110				  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
111				  "USB host overcurrent", info);
112		if (ret != 0)
113			pr_err("failed to request usb oc irq: %d\n", ret);
114	} else {
115		free_irq(gpio_to_irq(S3C64XX_GPL(10)), info);
116	}
117}
118
119static struct s3c2410_hcd_info smartq_usb_host_info = {
120	.port[0]	= {
121		.flags	= S3C_HCDFLG_USED
122	},
123	.port[1]	= {
124		.flags	= 0
125	},
126
127	.power_control	= smartq_usb_host_powercontrol,
128	.enable_oc	= smartq_usb_host_enableoc,
129};
130
131static struct gpio_vbus_mach_info smartq_usb_otg_vbus_pdata = {
132	.gpio_vbus		= S3C64XX_GPL(9),
133	.gpio_pullup		= -1,
134	.gpio_vbus_inverted	= true,
135};
136
137static struct platform_device smartq_usb_otg_vbus_dev = {
138	.name			= "gpio-vbus",
139	.dev.platform_data	= &smartq_usb_otg_vbus_pdata,
140};
141
142static int smartq_bl_init(struct device *dev)
143{
144    s3c_gpio_cfgpin(S3C64XX_GPF(15), S3C_GPIO_SFN(2));
145
146    return 0;
147}
148
149static struct platform_pwm_backlight_data smartq_backlight_data = {
150	.pwm_id		= 1,
151	.max_brightness	= 1000,
152	.dft_brightness	= 600,
153	.pwm_period_ns	= 1000000000 / (1000 * 20),
154	.enable_gpio	= -1,
155	.init		= smartq_bl_init,
156};
157
158static struct platform_device smartq_backlight_device = {
159	.name		= "pwm-backlight",
160	.dev		= {
161		.parent	= &samsung_device_pwm.dev,
162		.platform_data = &smartq_backlight_data,
163	},
164};
165
166static struct s3c2410_ts_mach_info smartq_touchscreen_pdata __initdata = {
167	.delay			= 65535,
168	.presc			= 99,
169	.oversampling_shift	= 4,
170};
171
172static struct s3c_sdhci_platdata smartq_internal_hsmmc_pdata = {
173	.max_width		= 4,
174	.cd_type		= S3C_SDHCI_CD_PERMANENT,
175};
176
177static struct s3c_hwmon_pdata smartq_hwmon_pdata __initdata = {
178	/* Battery voltage (?-4.2V) */
179	.in[0] = &(struct s3c_hwmon_chcfg) {
180		.name		= "smartq:battery-voltage",
181		.mult		= 3300,
182		.div		= 2048,
183	},
184	/* Reference voltage (1.2V) */
185	.in[1] = &(struct s3c_hwmon_chcfg) {
186		.name		= "smartq:reference-voltage",
187		.mult		= 3300,
188		.div		= 4096,
189	},
190};
191
192static struct s3c_hsotg_plat smartq_hsotg_pdata;
193
194static int __init smartq_lcd_setup_gpio(void)
195{
196	int ret;
197
198	ret = gpio_request(S3C64XX_GPM(3), "LCD power");
199	if (ret < 0)
200		return ret;
201
202	/* turn power off */
203	gpio_direction_output(S3C64XX_GPM(3), 0);
204
205	return 0;
206}
207
208/* GPM0 -> CS */
209static struct spi_gpio_platform_data smartq_lcd_control = {
210	.sck			= S3C64XX_GPM(1),
211	.mosi			= S3C64XX_GPM(2),
212	.miso			= S3C64XX_GPM(2),
213};
214
215static struct platform_device smartq_lcd_control_device = {
216	.name			= "spi-gpio",
217	.id			= 1,
218	.dev.platform_data	= &smartq_lcd_control,
219};
220
221static void smartq_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
222{
223	gpio_direction_output(S3C64XX_GPM(3), power);
224}
225
226static struct plat_lcd_data smartq_lcd_power_data = {
227	.set_power	= smartq_lcd_power_set,
228};
229
230static struct platform_device smartq_lcd_power_device = {
231	.name			= "platform-lcd",
232	.dev.parent		= &s3c_device_fb.dev,
233	.dev.platform_data	= &smartq_lcd_power_data,
234};
235
236static struct i2c_board_info smartq_i2c_devs[] __initdata = {
237	{ I2C_BOARD_INFO("wm8987", 0x1a), },
238};
239
240static struct platform_device *smartq_devices[] __initdata = {
241	&s3c_device_hsmmc1,	/* Init iNAND first, ... */
242	&s3c_device_hsmmc0,	/* ... then the external SD card */
243	&s3c_device_hsmmc2,
244	&s3c_device_adc,
245	&s3c_device_fb,
246	&s3c_device_hwmon,
247	&s3c_device_i2c0,
248	&s3c_device_ohci,
249	&s3c_device_rtc,
250	&samsung_device_pwm,
251	&s3c_device_ts,
252	&s3c_device_usb_hsotg,
253	&s3c64xx_device_iis0,
254	&smartq_backlight_device,
255	&smartq_lcd_control_device,
256	&smartq_lcd_power_device,
257	&smartq_usb_otg_vbus_dev,
258};
259
260static void __init smartq_lcd_mode_set(void)
261{
262	u32 tmp;
263
264	/* set the LCD type */
265	tmp = __raw_readl(S3C64XX_SPCON);
266	tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
267	tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
268	__raw_writel(tmp, S3C64XX_SPCON);
269
270	/* remove the LCD bypass */
271	tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
272	tmp &= ~MIFPCON_LCD_BYPASS;
273	__raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
274}
275
276static void smartq_power_off(void)
277{
278	gpio_direction_output(S3C64XX_GPK(15), 1);
279}
280
281static int __init smartq_power_off_init(void)
282{
283	int ret;
284
285	ret = gpio_request(S3C64XX_GPK(15), "Power control");
286	if (ret < 0) {
287		pr_err("%s: failed to get GPK15\n", __func__);
288		return ret;
289	}
290
291	/* leave power on */
292	gpio_direction_output(S3C64XX_GPK(15), 0);
293
294	pm_power_off = smartq_power_off;
295
296	return ret;
297}
298
299static int __init smartq_usb_host_init(void)
300{
301	int ret;
302
303	ret = gpio_request(S3C64XX_GPL(0), "USB power control");
304	if (ret < 0) {
305		pr_err("%s: failed to get GPL0\n", __func__);
306		return ret;
307	}
308
309	ret = gpio_request(S3C64XX_GPL(1), "USB host power control");
310	if (ret < 0) {
311		pr_err("%s: failed to get GPL1\n", __func__);
312		goto err;
313	}
314
315	if (!machine_is_smartq5()) {
316		/* This isn't present on a SmartQ 5 board */
317		ret = gpio_request(S3C64XX_GPL(10), "USB host overcurrent");
318		if (ret < 0) {
319			pr_err("%s: failed to get GPL10\n", __func__);
320			goto err2;
321		}
322	}
323
324	/* turn power off */
325	gpio_direction_output(S3C64XX_GPL(0), 0);
326	gpio_direction_output(S3C64XX_GPL(1), 0);
327	if (!machine_is_smartq5())
328		gpio_direction_input(S3C64XX_GPL(10));
329
330	s3c_device_ohci.dev.platform_data = &smartq_usb_host_info;
331
332	return 0;
333
334err2:
335	gpio_free(S3C64XX_GPL(1));
336err:
337	gpio_free(S3C64XX_GPL(0));
338	return ret;
339}
340
341static int __init smartq_wifi_init(void)
342{
343	int ret;
344
345	ret = gpio_request(S3C64XX_GPK(1), "wifi control");
346	if (ret < 0) {
347		pr_err("%s: failed to get GPK1\n", __func__);
348		return ret;
349	}
350
351	ret = gpio_request(S3C64XX_GPK(2), "wifi reset");
352	if (ret < 0) {
353		pr_err("%s: failed to get GPK2\n", __func__);
354		gpio_free(S3C64XX_GPK(1));
355		return ret;
356	}
357
358	/* turn power on */
359	gpio_direction_output(S3C64XX_GPK(1), 1);
360
361	/* reset device */
362	gpio_direction_output(S3C64XX_GPK(2), 0);
363	mdelay(100);
364	gpio_set_value(S3C64XX_GPK(2), 1);
365	gpio_direction_input(S3C64XX_GPK(2));
366
367	return 0;
368}
369
370static struct map_desc smartq_iodesc[] __initdata = {};
371void __init smartq_map_io(void)
372{
373	s3c64xx_init_io(smartq_iodesc, ARRAY_SIZE(smartq_iodesc));
374	s3c64xx_set_xtal_freq(12000000);
375	s3c64xx_set_xusbxti_freq(12000000);
376	s3c24xx_init_uarts(smartq_uartcfgs, ARRAY_SIZE(smartq_uartcfgs));
377	samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
378
379	smartq_lcd_mode_set();
380}
381
382void __init smartq_machine_init(void)
383{
384	s3c_i2c0_set_platdata(NULL);
385	s3c_hsotg_set_platdata(&smartq_hsotg_pdata);
386	s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
387	s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
388	s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
389	s3c24xx_ts_set_platdata(&smartq_touchscreen_pdata);
390
391	i2c_register_board_info(0, smartq_i2c_devs,
392				ARRAY_SIZE(smartq_i2c_devs));
393
394	WARN_ON(smartq_lcd_setup_gpio());
395	WARN_ON(smartq_power_off_init());
396	WARN_ON(smartq_usb_host_init());
397	WARN_ON(smartq_wifi_init());
398
399	platform_add_devices(smartq_devices, ARRAY_SIZE(smartq_devices));
400}
401