Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mach-hmt.c
Go to the documentation of this file.
1 /* mach-hmt.c - Platform code for Airgoo HMT
2  *
3  * Copyright 2009 Peter Korsgaard <[email protected]>
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 <video/samsung_fimd.h>
30 #include <mach/hardware.h>
31 #include <mach/map.h>
32 
33 #include <asm/hardware/vic.h>
34 #include <asm/irq.h>
35 #include <asm/mach-types.h>
36 
37 #include <plat/regs-serial.h>
38 #include <linux/platform_data/i2c-s3c2410.h>
39 #include <plat/fb.h>
40 #include <linux/platform_data/mtd-nand-s3c2410.h>
41 
42 #include <plat/clock.h>
43 #include <plat/devs.h>
44 #include <plat/cpu.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 
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 
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 
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  .max_bpp = 32,
133  .default_bpp = 16,
134  .xres = 800,
135  .yres = 480,
136 };
137 
138 static struct fb_videomode hmt_lcd_timing = {
139  .left_margin = 8,
140  .right_margin = 13,
141  .upper_margin = 7,
142  .lower_margin = 5,
143  .hsync_len = 3,
144  .vsync_len = 1,
145  .xres = 800,
146  .yres = 480,
147 };
148 
149 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
150 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
151  .setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
152  .vtiming = &hmt_lcd_timing,
153  .win[0] = &hmt_fb_win0,
154  .vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
155  .vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
156 };
157 
158 static struct mtd_partition hmt_nand_part[] = {
159  [0] = {
160  .name = "uboot",
161  .size = SZ_512K,
162  .offset = 0,
163  },
164  [1] = {
165  .name = "uboot-env1",
166  .size = SZ_256K,
167  .offset = SZ_512K,
168  },
169  [2] = {
170  .name = "uboot-env2",
171  .size = SZ_256K,
172  .offset = SZ_512K + SZ_256K,
173  },
174  [3] = {
175  .name = "kernel",
176  .size = SZ_2M,
177  .offset = SZ_1M,
178  },
179  [4] = {
180  .name = "rootfs",
181  .size = MTDPART_SIZ_FULL,
182  .offset = SZ_1M + SZ_2M,
183  },
184 };
185 
186 static struct s3c2410_nand_set hmt_nand_sets[] = {
187  [0] = {
188  .name = "nand",
189  .nr_chips = 1,
190  .nr_partitions = ARRAY_SIZE(hmt_nand_part),
191  .partitions = hmt_nand_part,
192  },
193 };
194 
195 static struct s3c2410_platform_nand hmt_nand_info = {
196  .tacls = 25,
197  .twrph0 = 55,
198  .twrph1 = 40,
199  .nr_sets = ARRAY_SIZE(hmt_nand_sets),
200  .sets = hmt_nand_sets,
201 };
202 
203 static struct gpio_led hmt_leds[] = {
204  { /* left function keys */
205  .name = "left:blue",
206  .gpio = S3C64XX_GPO(12),
207  .default_trigger = "default-on",
208  },
209  { /* right function keys - red */
210  .name = "right:red",
211  .gpio = S3C64XX_GPO(13),
212  },
213  { /* right function keys - green */
214  .name = "right:green",
215  .gpio = S3C64XX_GPO(14),
216  },
217  { /* right function keys - blue */
218  .name = "right:blue",
219  .gpio = S3C64XX_GPO(15),
220  .default_trigger = "default-on",
221  },
222 };
223 
224 static struct gpio_led_platform_data hmt_led_data = {
225  .num_leds = ARRAY_SIZE(hmt_leds),
226  .leds = hmt_leds,
227 };
228 
229 static struct platform_device hmt_leds_device = {
230  .name = "leds-gpio",
231  .id = -1,
232  .dev.platform_data = &hmt_led_data,
233 };
234 
235 static struct map_desc hmt_iodesc[] = {};
236 
237 static struct platform_device *hmt_devices[] __initdata = {
238  &s3c_device_i2c0,
239  &s3c_device_nand,
240  &s3c_device_fb,
241  &s3c_device_ohci,
242  &s3c_device_timer[1],
243  &hmt_backlight_device,
244  &hmt_leds_device,
245 };
246 
247 static void __init hmt_map_io(void)
248 {
249  s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
250  s3c24xx_init_clocks(12000000);
251  s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
252 }
253 
254 static void __init hmt_machine_init(void)
255 {
256  s3c_i2c0_set_platdata(NULL);
257  s3c_fb_set_platdata(&hmt_lcd_pdata);
258  s3c_nand_set_platdata(&hmt_nand_info);
259 
260  gpio_request(S3C64XX_GPC(7), "usb power");
261  gpio_direction_output(S3C64XX_GPC(7), 0);
262  gpio_request(S3C64XX_GPM(0), "usb power");
263  gpio_direction_output(S3C64XX_GPM(0), 1);
264  gpio_request(S3C64XX_GPK(7), "usb power");
265  gpio_direction_output(S3C64XX_GPK(7), 1);
266  gpio_request(S3C64XX_GPF(13), "usb power");
267  gpio_direction_output(S3C64XX_GPF(13), 1);
268 
269  platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
270 }
271 
272 MACHINE_START(HMT, "Airgoo-HMT")
273  /* Maintainer: Peter Korsgaard <[email protected]> */
274  .atag_offset = 0x100,
275  .init_irq = s3c6410_init_irq,
276  .handle_irq = vic_handle_irq,
277  .map_io = hmt_map_io,
278  .init_machine = hmt_machine_init,
279  .init_late = s3c64xx_init_late,
280  .timer = &s3c24xx_timer,
281  .restart = s3c64xx_restart,
282 MACHINE_END
Generated on Thu Jan 10 2013 13:01:38 for Linux Kernel by   doxygen 1.8.2