arch/arm/mach-s3c64xx/mach-hmt.c

   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/clock.h>
  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
  53 static 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
  77 static int hmt_bl_init(struct device *dev)
  78 {
  79         int ret;
  80
  81         ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
  82         if (!ret)
  83                 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
  84
  85         return ret;
  86 }
  87
  88 static int hmt_bl_notify(struct device *dev, int brightness)
  89 {
  90         /*
  91          * translate from CIELUV/CIELAB L*->brightness, E.G. from
  92          * perceived luminance to light output. Assumes range 0..25600
  93          */
  94         if (brightness < 0x800) {
  95                 /* Y = Yn * L / 903.3 */
  96                 brightness = (100*256 * brightness + 231245/2) / 231245;
  97         } else {
  98                 /* Y = Yn * ((L + 16) / 116 )^3 */
  99                 int t = (brightness*4 + 16*1024 + 58)/116;
 100                 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
 101         }
 102
 103         gpio_set_value(S3C64XX_GPB(4), brightness);
 104
 105         return brightness;
 106 }
 107
 108 static void hmt_bl_exit(struct device *dev)
 109 {
 110         gpio_free(S3C64XX_GPB(4));
 111 }
 112
 113 static struct platform_pwm_backlight_data hmt_backlight_data = {
 114         .pwm_id         = 1,
 115         .max_brightness = 100 * 256,
 116         .dft_brightness = 40 * 256,
 117         .pwm_period_ns  = 1000000000 / (100 * 256 * 20),
 118         .enable_gpio    = -1,
 119         .init           = hmt_bl_init,
 120         .notify         = hmt_bl_notify,
 121         .exit           = hmt_bl_exit,
 122
 123 };
 124
 125 static struct platform_device hmt_backlight_device = {
 126         .name           = "pwm-backlight",
 127         .dev            = {
 128                 .parent = &samsung_device_pwm.dev,
 129                 .platform_data = &hmt_backlight_data,
 130         },
 131 };
 132
 133 static struct s3c_fb_pd_win hmt_fb_win0 = {
 134         .max_bpp        = 32,
 135         .default_bpp    = 16,
 136         .xres           = 800,
 137         .yres           = 480,
 138 };
 139
 140 static struct fb_videomode hmt_lcd_timing = {
 141         .left_margin    = 8,
 142         .right_margin   = 13,
 143         .upper_margin   = 7,
 144         .lower_margin   = 5,
 145         .hsync_len      = 3,
 146         .vsync_len      = 1,
 147         .xres           = 800,
 148         .yres           = 480,
 149 };
 150
 151 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
 152 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
 153         .setup_gpio     = s3c64xx_fb_gpio_setup_24bpp,
 154         .vtiming        = &hmt_lcd_timing,
 155         .win[0]         = &hmt_fb_win0,
 156         .vidcon0        = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
 157         .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
 158 };
 159
 160 static struct mtd_partition hmt_nand_part[] = {
 161         [0] = {
 162                 .name   = "uboot",
 163                 .size   = SZ_512K,
 164                 .offset = 0,
 165         },
 166         [1] = {
 167                 .name   = "uboot-env1",
 168                 .size   = SZ_256K,
 169                 .offset = SZ_512K,
 170         },
 171         [2] = {
 172                 .name   = "uboot-env2",
 173                 .size   = SZ_256K,
 174                 .offset = SZ_512K + SZ_256K,
 175         },
 176         [3] = {
 177                 .name   = "kernel",
 178                 .size   = SZ_2M,
 179                 .offset = SZ_1M,
 180         },
 181         [4] = {
 182                 .name   = "rootfs",
 183                 .size   = MTDPART_SIZ_FULL,
 184                 .offset = SZ_1M + SZ_2M,
 185         },
 186 };
 187
 188 static struct s3c2410_nand_set hmt_nand_sets[] = {
 189         [0] = {
 190                 .name           = "nand",
 191                 .nr_chips       = 1,
 192                 .nr_partitions  = ARRAY_SIZE(hmt_nand_part),
 193                 .partitions     = hmt_nand_part,
 194         },
 195 };
 196
 197 static struct s3c2410_platform_nand hmt_nand_info = {
 198         .tacls          = 25,
 199         .twrph0         = 55,
 200         .twrph1         = 40,
 201         .nr_sets        = ARRAY_SIZE(hmt_nand_sets),
 202         .sets           = hmt_nand_sets,
 203 };
 204
 205 static struct gpio_led hmt_leds[] = {
 206         { /* left function keys */
 207                 .name                   = "left:blue",
 208                 .gpio                   = S3C64XX_GPO(12),
 209                 .default_trigger        = "default-on",
 210         },
 211         { /* right function keys - red */
 212                 .name                   = "right:red",
 213                 .gpio                   = S3C64XX_GPO(13),
 214         },
 215         { /* right function keys - green */
 216                 .name                   = "right:green",
 217                 .gpio                   = S3C64XX_GPO(14),
 218         },
 219         { /* right function keys - blue */
 220                 .name                   = "right:blue",
 221                 .gpio                   = S3C64XX_GPO(15),
 222                 .default_trigger        = "default-on",
 223         },
 224 };
 225
 226 static struct gpio_led_platform_data hmt_led_data = {
 227         .num_leds = ARRAY_SIZE(hmt_leds),
 228         .leds = hmt_leds,
 229 };
 230
 231 static struct platform_device hmt_leds_device = {
 232         .name                   = "leds-gpio",
 233         .id                     = -1,
 234         .dev.platform_data      = &hmt_led_data,
 235 };
 236
 237 static struct map_desc hmt_iodesc[] = {};
 238
 239 static struct platform_device *hmt_devices[] __initdata = {
 240         &s3c_device_i2c0,
 241         &s3c_device_nand,
 242         &s3c_device_fb,
 243         &s3c_device_ohci,
 244         &samsung_device_pwm,
 245         &hmt_backlight_device,
 246         &hmt_leds_device,
 247 };
 248
 249 static void __init hmt_map_io(void)
 250 {
 251         s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
 252         s3c64xx_set_xtal_freq(12000000);
 253         s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
 254         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 255 }
 256
 257 static void __init hmt_machine_init(void)
 258 {
 259         s3c_i2c0_set_platdata(NULL);
 260         s3c_fb_set_platdata(&hmt_lcd_pdata);
 261         s3c_nand_set_platdata(&hmt_nand_info);
 262
 263         gpio_request(S3C64XX_GPC(7), "usb power");
 264         gpio_direction_output(S3C64XX_GPC(7), 0);
 265         gpio_request(S3C64XX_GPM(0), "usb power");
 266         gpio_direction_output(S3C64XX_GPM(0), 1);
 267         gpio_request(S3C64XX_GPK(7), "usb power");
 268         gpio_direction_output(S3C64XX_GPK(7), 1);
 269         gpio_request(S3C64XX_GPF(13), "usb power");
 270         gpio_direction_output(S3C64XX_GPF(13), 1);
 271
 272         platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
 273 }
 274
 275 MACHINE_START(HMT, "Airgoo-HMT")
 276         /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
 277         .atag_offset    = 0x100,
 278         .init_irq       = s3c6410_init_irq,
 279         .map_io         = hmt_map_io,
 280         .init_machine   = hmt_machine_init,
 281         .init_late      = s3c64xx_init_late,
 282         .init_time      = samsung_timer_init,
 283         .restart        = s3c64xx_restart,
 284 MACHINE_END