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