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/platform_device.h>
15 #include <linux/io.h>
16 #include <linux/i2c.h>
17 #include <linux/fb.h>
18 #include <linux/gpio.h>
19 #include <linux/delay.h>
20 #include <linux/leds.h>
21 #include <linux/pwm_backlight.h>
22 #include <linux/mtd/mtd.h>
23 #include <linux/mtd/partitions.h>
24 
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach/irq.h>
28 
29 #include <mach/hardware.h>
30 #include <mach/map.h>
31 
32 #include <asm/hardware/vic.h>
33 #include <asm/irq.h>
34 #include <asm/mach-types.h>
35 
36 #include <plat/regs-serial.h>
37 #include <plat/iic.h>
38 #include <plat/fb.h>
39 #include <plat/nand.h>
40 
41 #include <plat/clock.h>
42 #include <plat/devs.h>
43 #include <plat/cpu.h>
44 #include <plat/regs-fb-v4.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 
52 static 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 
hmt_bl_init(struct device * dev)76 static 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 
hmt_bl_notify(struct device * dev,int brightness)87 static 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 
hmt_bl_exit(struct device * dev)107 static void hmt_bl_exit(struct device *dev)
108 {
109 	gpio_free(S3C64XX_GPB(4));
110 }
111 
112 static 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 	.init		= hmt_bl_init,
118 	.notify		= hmt_bl_notify,
119 	.exit		= hmt_bl_exit,
120 
121 };
122 
123 static struct platform_device hmt_backlight_device = {
124 	.name		= "pwm-backlight",
125 	.dev		= {
126 		.parent	= &s3c_device_timer[1].dev,
127 		.platform_data = &hmt_backlight_data,
128 	},
129 };
130 
131 static struct s3c_fb_pd_win hmt_fb_win0 = {
132 	.win_mode	= {
133 		.left_margin	= 8,
134 		.right_margin	= 13,
135 		.upper_margin	= 7,
136 		.lower_margin	= 5,
137 		.hsync_len	= 3,
138 		.vsync_len	= 1,
139 		.xres		= 800,
140 		.yres		= 480,
141 	},
142 	.max_bpp	= 32,
143 	.default_bpp	= 16,
144 };
145 
146 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
147 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
148 	.setup_gpio	= s3c64xx_fb_gpio_setup_24bpp,
149 	.win[0]		= &hmt_fb_win0,
150 	.vidcon0	= VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
151 	.vidcon1	= VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
152 };
153 
154 static struct mtd_partition hmt_nand_part[] = {
155 	[0] = {
156 		.name	= "uboot",
157 		.size	= SZ_512K,
158 		.offset	= 0,
159 	},
160 	[1] = {
161 		.name	= "uboot-env1",
162 		.size	= SZ_256K,
163 		.offset	= SZ_512K,
164 	},
165 	[2] = {
166 		.name	= "uboot-env2",
167 		.size	= SZ_256K,
168 		.offset	= SZ_512K + SZ_256K,
169 	},
170 	[3] = {
171 		.name	= "kernel",
172 		.size	= SZ_2M,
173 		.offset	= SZ_1M,
174 	},
175 	[4] = {
176 		.name	= "rootfs",
177 		.size	= MTDPART_SIZ_FULL,
178 		.offset	= SZ_1M + SZ_2M,
179 	},
180 };
181 
182 static struct s3c2410_nand_set hmt_nand_sets[] = {
183 	[0] = {
184 		.name		= "nand",
185 		.nr_chips	= 1,
186 		.nr_partitions	= ARRAY_SIZE(hmt_nand_part),
187 		.partitions	= hmt_nand_part,
188 	},
189 };
190 
191 static struct s3c2410_platform_nand hmt_nand_info = {
192 	.tacls		= 25,
193 	.twrph0		= 55,
194 	.twrph1		= 40,
195 	.nr_sets	= ARRAY_SIZE(hmt_nand_sets),
196 	.sets		= hmt_nand_sets,
197 };
198 
199 static struct gpio_led hmt_leds[] = {
200 	{ /* left function keys */
201 		.name			= "left:blue",
202 		.gpio			= S3C64XX_GPO(12),
203 		.default_trigger	= "default-on",
204 	},
205 	{ /* right function keys - red */
206 		.name			= "right:red",
207 		.gpio			= S3C64XX_GPO(13),
208 	},
209 	{ /* right function keys - green */
210 		.name			= "right:green",
211 		.gpio			= S3C64XX_GPO(14),
212 	},
213 	{ /* right function keys - blue */
214 		.name			= "right:blue",
215 		.gpio			= S3C64XX_GPO(15),
216 		.default_trigger	= "default-on",
217 	},
218 };
219 
220 static struct gpio_led_platform_data hmt_led_data = {
221 	.num_leds = ARRAY_SIZE(hmt_leds),
222 	.leds = hmt_leds,
223 };
224 
225 static struct platform_device hmt_leds_device = {
226 	.name			= "leds-gpio",
227 	.id			= -1,
228 	.dev.platform_data	= &hmt_led_data,
229 };
230 
231 static struct map_desc hmt_iodesc[] = {};
232 
233 static struct platform_device *hmt_devices[] __initdata = {
234 	&s3c_device_i2c0,
235 	&s3c_device_nand,
236 	&s3c_device_fb,
237 	&s3c_device_ohci,
238 	&s3c_device_timer[1],
239 	&hmt_backlight_device,
240 	&hmt_leds_device,
241 };
242 
hmt_map_io(void)243 static void __init hmt_map_io(void)
244 {
245 	s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
246 	s3c24xx_init_clocks(12000000);
247 	s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
248 }
249 
hmt_machine_init(void)250 static void __init hmt_machine_init(void)
251 {
252 	s3c_i2c0_set_platdata(NULL);
253 	s3c_fb_set_platdata(&hmt_lcd_pdata);
254 	s3c_nand_set_platdata(&hmt_nand_info);
255 
256 	gpio_request(S3C64XX_GPC(7), "usb power");
257 	gpio_direction_output(S3C64XX_GPC(7), 0);
258 	gpio_request(S3C64XX_GPM(0), "usb power");
259 	gpio_direction_output(S3C64XX_GPM(0), 1);
260 	gpio_request(S3C64XX_GPK(7), "usb power");
261 	gpio_direction_output(S3C64XX_GPK(7), 1);
262 	gpio_request(S3C64XX_GPF(13), "usb power");
263 	gpio_direction_output(S3C64XX_GPF(13), 1);
264 
265 	platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
266 }
267 
268 MACHINE_START(HMT, "Airgoo-HMT")
269 	/* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
270 	.atag_offset	= 0x100,
271 	.init_irq	= s3c6410_init_irq,
272 	.handle_irq	= vic_handle_irq,
273 	.map_io		= hmt_map_io,
274 	.init_machine	= hmt_machine_init,
275 	.timer		= &s3c24xx_timer,
276 	.restart	= s3c64xx_restart,
277 MACHINE_END
278