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 <video/samsung_fimd.h>
  30 #include <mach/hardware.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 <linux/platform_data/i2c-s3c2410.h>
  38 #include <plat/fb.h>
  39 #include <linux/platform_data/mtd-nand-s3c2410.h>
  40
  41 #include <plat/clock.h>
  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
  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         .enable_gpio    = -1,
 118         .init           = hmt_bl_init,
 119         .notify         = hmt_bl_notify,
 120         .exit           = hmt_bl_exit,
 121
 122 };
 123
 124 static 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
 132 static struct s3c_fb_pd_win hmt_fb_win0 = {
 133         .max_bpp        = 32,
 134         .default_bpp    = 16,
 135         .xres           = 800,
 136         .yres           = 480,
 137 };
 138
 139 static 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 */
 151 static 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
 159 static 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
 187 static 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
 196 static 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
 204 static 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
 225 static struct gpio_led_platform_data hmt_led_data = {
 226         .num_leds = ARRAY_SIZE(hmt_leds),
 227         .leds = hmt_leds,
 228 };
 229
 230 static struct platform_device hmt_leds_device = {
 231         .name                   = "leds-gpio",
 232         .id                     = -1,
 233         .dev.platform_data      = &hmt_led_data,
 234 };
 235
 236 static struct map_desc hmt_iodesc[] = {};
 237
 238 static 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
 248 static 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
 256 static 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
 274 MACHINE_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_late      = s3c64xx_init_late,
 281         .init_time      = samsung_timer_init,
 282         .restart        = s3c64xx_restart,
 283 MACHINE_END