release/src-rt-6.x.4708/linux/linux-2.6.36/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/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/regs-fb.h>
  31 #include <mach/map.h>
  32
  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 <mach/s3c6410.h>
  42 #include <plat/clock.h>
  43 #include <plat/devs.h>
  44 #include <plat/cpu.h>
  45
  46 #define UCON S3C2410_UCON_DEFAULT
  47 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
  48 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
  49
  50 static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
  51         [0] = {
  52                 .hwport      = 0,
  53                 .flags       = 0,
  54                 .ucon        = UCON,
  55                 .ulcon       = ULCON,
  56                 .ufcon       = UFCON,
  57         },
  58         [1] = {
  59                 .hwport      = 1,
  60                 .flags       = 0,
  61                 .ucon        = UCON,
  62                 .ulcon       = ULCON,
  63                 .ufcon       = UFCON,
  64         },
  65         [2] = {
  66                 .hwport      = 2,
  67                 .flags       = 0,
  68                 .ucon        = UCON,
  69                 .ulcon       = ULCON,
  70                 .ufcon       = UFCON,
  71         },
  72 };
  73
  74 static int hmt_bl_init(struct device *dev)
  75 {
  76         int ret;
  77
  78         ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
  79         if (!ret)
  80                 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
  81
  82         return ret;
  83 }
  84
  85 static int hmt_bl_notify(struct device *dev, int brightness)
  86 {
  87         /*
  88          * translate from CIELUV/CIELAB L*->brightness, E.G. from
  89          * perceived luminance to light output. Assumes range 0..25600
  90          */
  91         if (brightness < 0x800) {
  92                 /* Y = Yn * L / 903.3 */
  93                 brightness = (100*256 * brightness + 231245/2) / 231245;
  94         } else {
  95                 /* Y = Yn * ((L + 16) / 116 )^3 */
  96                 int t = (brightness*4 + 16*1024 + 58)/116;
  97                 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
  98         }
  99
 100         gpio_set_value(S3C64XX_GPB(4), brightness);
 101
 102         return brightness;
 103 }
 104
 105 static void hmt_bl_exit(struct device *dev)
 106 {
 107         gpio_free(S3C64XX_GPB(4));
 108 }
 109
 110 static struct platform_pwm_backlight_data hmt_backlight_data = {
 111         .pwm_id         = 1,
 112         .max_brightness = 100 * 256,
 113         .dft_brightness = 40 * 256,
 114         .pwm_period_ns  = 1000000000 / (100 * 256 * 20),
 115         .init           = hmt_bl_init,
 116         .notify         = hmt_bl_notify,
 117         .exit           = hmt_bl_exit,
 118
 119 };
 120
 121 static struct platform_device hmt_backlight_device = {
 122         .name           = "pwm-backlight",
 123         .dev            = {
 124                 .parent = &s3c_device_timer[1].dev,
 125                 .platform_data = &hmt_backlight_data,
 126         },
 127 };
 128
 129 static struct s3c_fb_pd_win hmt_fb_win0 = {
 130         .win_mode       = {
 131                 .left_margin    = 8,
 132                 .right_margin   = 13,
 133                 .upper_margin   = 7,
 134                 .lower_margin   = 5,
 135                 .hsync_len      = 3,
 136                 .vsync_len      = 1,
 137                 .xres           = 800,
 138                 .yres           = 480,
 139         },
 140         .max_bpp        = 32,
 141         .default_bpp    = 16,
 142 };
 143
 144 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
 145 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
 146         .setup_gpio     = s3c64xx_fb_gpio_setup_24bpp,
 147         .win[0]         = &hmt_fb_win0,
 148         .vidcon0        = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
 149         .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
 150 };
 151
 152 static struct mtd_partition hmt_nand_part[] = {
 153         [0] = {
 154                 .name   = "uboot",
 155                 .size   = SZ_512K,
 156                 .offset = 0,
 157         },
 158         [1] = {
 159                 .name   = "uboot-env1",
 160                 .size   = SZ_256K,
 161                 .offset = SZ_512K,
 162         },
 163         [2] = {
 164                 .name   = "uboot-env2",
 165                 .size   = SZ_256K,
 166                 .offset = SZ_512K + SZ_256K,
 167         },
 168         [3] = {
 169                 .name   = "kernel",
 170                 .size   = SZ_2M,
 171                 .offset = SZ_1M,
 172         },
 173         [4] = {
 174                 .name   = "rootfs",
 175                 .size   = MTDPART_SIZ_FULL,
 176                 .offset = SZ_1M + SZ_2M,
 177         },
 178 };
 179
 180 static struct s3c2410_nand_set hmt_nand_sets[] = {
 181         [0] = {
 182                 .name           = "nand",
 183                 .nr_chips       = 1,
 184                 .nr_partitions  = ARRAY_SIZE(hmt_nand_part),
 185                 .partitions     = hmt_nand_part,
 186         },
 187 };
 188
 189 static struct s3c2410_platform_nand hmt_nand_info = {
 190         .tacls          = 25,
 191         .twrph0         = 55,
 192         .twrph1         = 40,
 193         .nr_sets        = ARRAY_SIZE(hmt_nand_sets),
 194         .sets           = hmt_nand_sets,
 195 };
 196
 197 static struct gpio_led hmt_leds[] = {
 198         { /* left function keys */
 199                 .name                   = "left:blue",
 200                 .gpio                   = S3C64XX_GPO(12),
 201                 .default_trigger        = "default-on",
 202         },
 203         { /* right function keys - red */
 204                 .name                   = "right:red",
 205                 .gpio                   = S3C64XX_GPO(13),
 206         },
 207         { /* right function keys - green */
 208                 .name                   = "right:green",
 209                 .gpio                   = S3C64XX_GPO(14),
 210         },
 211         { /* right function keys - blue */
 212                 .name                   = "right:blue",
 213                 .gpio                   = S3C64XX_GPO(15),
 214                 .default_trigger        = "default-on",
 215         },
 216 };
 217
 218 static struct gpio_led_platform_data hmt_led_data = {
 219         .num_leds = ARRAY_SIZE(hmt_leds),
 220         .leds = hmt_leds,
 221 };
 222
 223 static struct platform_device hmt_leds_device = {
 224         .name                   = "leds-gpio",
 225         .id                     = -1,
 226         .dev.platform_data      = &hmt_led_data,
 227 };
 228
 229 static struct map_desc hmt_iodesc[] = {};
 230
 231 static struct platform_device *hmt_devices[] __initdata = {
 232         &s3c_device_i2c0,
 233         &s3c_device_nand,
 234         &s3c_device_fb,
 235         &s3c_device_ohci,
 236         &s3c_device_timer[1],
 237         &hmt_backlight_device,
 238         &hmt_leds_device,
 239 };
 240
 241 static void __init hmt_map_io(void)
 242 {
 243         s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
 244         s3c24xx_init_clocks(12000000);
 245         s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
 246 }
 247
 248 static void __init hmt_machine_init(void)
 249 {
 250         s3c_i2c0_set_platdata(NULL);
 251         s3c_fb_set_platdata(&hmt_lcd_pdata);
 252         s3c_nand_set_platdata(&hmt_nand_info);
 253
 254         gpio_request(S3C64XX_GPC(7), "usb power");
 255         gpio_direction_output(S3C64XX_GPC(7), 0);
 256         gpio_request(S3C64XX_GPM(0), "usb power");
 257         gpio_direction_output(S3C64XX_GPM(0), 1);
 258         gpio_request(S3C64XX_GPK(7), "usb power");
 259         gpio_direction_output(S3C64XX_GPK(7), 1);
 260         gpio_request(S3C64XX_GPF(13), "usb power");
 261         gpio_direction_output(S3C64XX_GPF(13), 1);
 262
 263         platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
 264 }
 265
 266 MACHINE_START(HMT, "Airgoo-HMT")
 267         /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
 268         .phys_io        = S3C_PA_UART & 0xfff00000,
 269         .io_pg_offst    = (((u32)S3C_VA_UART) >> 18) & 0xfffc,
 270         .boot_params    = S3C64XX_PA_SDRAM + 0x100,
 271         .init_irq       = s3c6410_init_irq,
 272         .map_io         = hmt_map_io,
 273         .init_machine   = hmt_machine_init,
 274         .timer          = &s3c24xx_timer,
 275 MACHINE_END