1/* mach-hmt.c - Platform code for Airgoo HMT
2 *
3 * Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9*/
10
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/serial_core.h>
14#include <linux/serial_s3c.h>
15#include <linux/platform_device.h>
16#include <linux/io.h>
17#include <linux/i2c.h>
18#include <linux/fb.h>
19#include <linux/gpio.h>
20#include <linux/delay.h>
21#include <linux/leds.h>
22#include <linux/pwm.h>
23#include <linux/pwm_backlight.h>
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/partitions.h>
26
27#include <asm/mach/arch.h>
28#include <asm/mach/map.h>
29#include <asm/mach/irq.h>
30
31#include <video/samsung_fimd.h>
32#include <mach/hardware.h>
33#include <mach/map.h>
34
35#include <asm/irq.h>
36#include <asm/mach-types.h>
37
38#include <linux/platform_data/i2c-s3c2410.h>
39#include <mach/gpio-samsung.h>
40#include <plat/fb.h>
41#include <linux/platform_data/mtd-nand-s3c2410.h>
42
43#include <plat/devs.h>
44#include <plat/cpu.h>
45#include <plat/samsung-time.h>
46
47#include "common.h"
48
49#define UCON S3C2410_UCON_DEFAULT
50#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
51#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
52
53static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
54	[0] = {
55		.hwport	     = 0,
56		.flags	     = 0,
57		.ucon	     = UCON,
58		.ulcon	     = ULCON,
59		.ufcon	     = UFCON,
60	},
61	[1] = {
62		.hwport	     = 1,
63		.flags	     = 0,
64		.ucon	     = UCON,
65		.ulcon	     = ULCON,
66		.ufcon	     = UFCON,
67	},
68	[2] = {
69		.hwport	     = 2,
70		.flags	     = 0,
71		.ucon	     = UCON,
72		.ulcon	     = ULCON,
73		.ufcon	     = UFCON,
74	},
75};
76
77static struct pwm_lookup hmt_pwm_lookup[] = {
78	PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
79		   1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
80};
81
82static int hmt_bl_init(struct device *dev)
83{
84	int ret;
85
86	ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
87	if (!ret)
88		ret = gpio_direction_output(S3C64XX_GPB(4), 0);
89
90	return ret;
91}
92
93static int hmt_bl_notify(struct device *dev, int brightness)
94{
95	/*
96	 * translate from CIELUV/CIELAB L*->brightness, E.G. from
97	 * perceived luminance to light output. Assumes range 0..25600
98	 */
99	if (brightness < 0x800) {
100		/* Y = Yn * L / 903.3 */
101		brightness = (100*256 * brightness + 231245/2) / 231245;
102	} else {
103		/* Y = Yn * ((L + 16) / 116 )^3 */
104		int t = (brightness*4 + 16*1024 + 58)/116;
105		brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
106	}
107
108	gpio_set_value(S3C64XX_GPB(4), brightness);
109
110	return brightness;
111}
112
113static void hmt_bl_exit(struct device *dev)
114{
115	gpio_free(S3C64XX_GPB(4));
116}
117
118static struct platform_pwm_backlight_data hmt_backlight_data = {
119	.max_brightness	= 100 * 256,
120	.dft_brightness	= 40 * 256,
121	.enable_gpio	= -1,
122	.init		= hmt_bl_init,
123	.notify		= hmt_bl_notify,
124	.exit		= hmt_bl_exit,
125
126};
127
128static struct platform_device hmt_backlight_device = {
129	.name		= "pwm-backlight",
130	.dev		= {
131		.parent	= &samsung_device_pwm.dev,
132		.platform_data = &hmt_backlight_data,
133	},
134};
135
136static struct s3c_fb_pd_win hmt_fb_win0 = {
137	.max_bpp	= 32,
138	.default_bpp	= 16,
139	.xres		= 800,
140	.yres		= 480,
141};
142
143static struct fb_videomode hmt_lcd_timing = {
144	.left_margin	= 8,
145	.right_margin	= 13,
146	.upper_margin	= 7,
147	.lower_margin	= 5,
148	.hsync_len	= 3,
149	.vsync_len	= 1,
150	.xres		= 800,
151	.yres		= 480,
152};
153
154/* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
155static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
156	.setup_gpio	= s3c64xx_fb_gpio_setup_24bpp,
157	.vtiming	= &hmt_lcd_timing,
158	.win[0]		= &hmt_fb_win0,
159	.vidcon0	= VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
160	.vidcon1	= VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
161};
162
163static struct mtd_partition hmt_nand_part[] = {
164	[0] = {
165		.name	= "uboot",
166		.size	= SZ_512K,
167		.offset	= 0,
168	},
169	[1] = {
170		.name	= "uboot-env1",
171		.size	= SZ_256K,
172		.offset	= SZ_512K,
173	},
174	[2] = {
175		.name	= "uboot-env2",
176		.size	= SZ_256K,
177		.offset	= SZ_512K + SZ_256K,
178	},
179	[3] = {
180		.name	= "kernel",
181		.size	= SZ_2M,
182		.offset	= SZ_1M,
183	},
184	[4] = {
185		.name	= "rootfs",
186		.size	= MTDPART_SIZ_FULL,
187		.offset	= SZ_1M + SZ_2M,
188	},
189};
190
191static struct s3c2410_nand_set hmt_nand_sets[] = {
192	[0] = {
193		.name		= "nand",
194		.nr_chips	= 1,
195		.nr_partitions	= ARRAY_SIZE(hmt_nand_part),
196		.partitions	= hmt_nand_part,
197	},
198};
199
200static struct s3c2410_platform_nand hmt_nand_info = {
201	.tacls		= 25,
202	.twrph0		= 55,
203	.twrph1		= 40,
204	.nr_sets	= ARRAY_SIZE(hmt_nand_sets),
205	.sets		= hmt_nand_sets,
206};
207
208static struct gpio_led hmt_leds[] = {
209	{ /* left function keys */
210		.name			= "left:blue",
211		.gpio			= S3C64XX_GPO(12),
212		.default_trigger	= "default-on",
213	},
214	{ /* right function keys - red */
215		.name			= "right:red",
216		.gpio			= S3C64XX_GPO(13),
217	},
218	{ /* right function keys - green */
219		.name			= "right:green",
220		.gpio			= S3C64XX_GPO(14),
221	},
222	{ /* right function keys - blue */
223		.name			= "right:blue",
224		.gpio			= S3C64XX_GPO(15),
225		.default_trigger	= "default-on",
226	},
227};
228
229static struct gpio_led_platform_data hmt_led_data = {
230	.num_leds = ARRAY_SIZE(hmt_leds),
231	.leds = hmt_leds,
232};
233
234static struct platform_device hmt_leds_device = {
235	.name			= "leds-gpio",
236	.id			= -1,
237	.dev.platform_data	= &hmt_led_data,
238};
239
240static struct map_desc hmt_iodesc[] = {};
241
242static struct platform_device *hmt_devices[] __initdata = {
243	&s3c_device_i2c0,
244	&s3c_device_nand,
245	&s3c_device_fb,
246	&s3c_device_ohci,
247	&samsung_device_pwm,
248	&hmt_backlight_device,
249	&hmt_leds_device,
250};
251
252static void __init hmt_map_io(void)
253{
254	s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
255	s3c64xx_set_xtal_freq(12000000);
256	s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
257	samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
258}
259
260static void __init hmt_machine_init(void)
261{
262	s3c_i2c0_set_platdata(NULL);
263	s3c_fb_set_platdata(&hmt_lcd_pdata);
264	s3c_nand_set_platdata(&hmt_nand_info);
265
266	gpio_request(S3C64XX_GPC(7), "usb power");
267	gpio_direction_output(S3C64XX_GPC(7), 0);
268	gpio_request(S3C64XX_GPM(0), "usb power");
269	gpio_direction_output(S3C64XX_GPM(0), 1);
270	gpio_request(S3C64XX_GPK(7), "usb power");
271	gpio_direction_output(S3C64XX_GPK(7), 1);
272	gpio_request(S3C64XX_GPF(13), "usb power");
273	gpio_direction_output(S3C64XX_GPF(13), 1);
274
275	pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
276	platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
277}
278
279MACHINE_START(HMT, "Airgoo-HMT")
280	/* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
281	.atag_offset	= 0x100,
282	.init_irq	= s3c6410_init_irq,
283	.map_io		= hmt_map_io,
284	.init_machine	= hmt_machine_init,
285	.init_time	= samsung_timer_init,
286	.restart	= s3c64xx_restart,
287MACHINE_END
288