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.h>
  23 #include <linux/pwm_backlight.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/irq.h>
  30
  31 #include <video/samsung_fimd.h>
  32 #include <mach/hardware.h>
  33 #include <mach/map.h>
  34 #include <mach/irqs.h>
  35
  36 #include <asm/irq.h>
  37 #include <asm/mach-types.h>
  38
  39 #include <linux/platform_data/i2c-s3c2410.h>
  40 #include <mach/gpio-samsung.h>
  41 #include <plat/fb.h>
  42 #include <linux/platform_data/mtd-nand-s3c2410.h>
  43
  44 #include <plat/devs.h>
  45 #include <plat/cpu.h>
  46 #include <plat/samsung-time.h>
  47
  48 #include "common.h"
  49
  50 #define UCON S3C2410_UCON_DEFAULT
  51 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
  52 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
  53
  54 static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
  55         [0] = {
  56                 .hwport      = 0,
  57                 .flags       = 0,
  58                 .ucon        = UCON,
  59                 .ulcon       = ULCON,
  60                 .ufcon       = UFCON,
  61         },
  62         [1] = {
  63                 .hwport      = 1,
  64                 .flags       = 0,
  65                 .ucon        = UCON,
  66                 .ulcon       = ULCON,
  67                 .ufcon       = UFCON,
  68         },
  69         [2] = {
  70                 .hwport      = 2,
  71                 .flags       = 0,
  72                 .ucon        = UCON,
  73                 .ulcon       = ULCON,
  74                 .ufcon       = UFCON,
  75         },
  76 };
  77
  78 static struct pwm_lookup hmt_pwm_lookup[] = {
  79         PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
  80                    1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
  81 };
  82
  83 static int hmt_bl_init(struct device *dev)
  84 {
  85         int ret;
  86
  87         ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
  88         if (!ret)
  89                 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
  90
  91         return ret;
  92 }
  93
  94 static int hmt_bl_notify(struct device *dev, int brightness)
  95 {
  96         /*
  97          * translate from CIELUV/CIELAB L*->brightness, E.G. from
  98          * perceived luminance to light output. Assumes range 0..25600
  99          */
 100         if (brightness < 0x800) {
 101                 /* Y = Yn * L / 903.3 */
 102                 brightness = (100*256 * brightness + 231245/2) / 231245;
 103         } else {
 104                 /* Y = Yn * ((L + 16) / 116 )^3 */
 105                 int t = (brightness*4 + 16*1024 + 58)/116;
 106                 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
 107         }
 108
 109         gpio_set_value(S3C64XX_GPB(4), brightness);
 110
 111         return brightness;
 112 }
 113
 114 static void hmt_bl_exit(struct device *dev)
 115 {
 116         gpio_free(S3C64XX_GPB(4));
 117 }
 118
 119 static struct platform_pwm_backlight_data hmt_backlight_data = {
 120         .max_brightness = 100 * 256,
 121         .dft_brightness = 40 * 256,
 122         .enable_gpio    = -1,
 123         .init           = hmt_bl_init,
 124         .notify         = hmt_bl_notify,
 125         .exit           = hmt_bl_exit,
 126
 127 };
 128
 129 static struct platform_device hmt_backlight_device = {
 130         .name           = "pwm-backlight",
 131         .dev            = {
 132                 .parent = &samsung_device_pwm.dev,
 133                 .platform_data = &hmt_backlight_data,
 134         },
 135 };
 136
 137 static struct s3c_fb_pd_win hmt_fb_win0 = {
 138         .max_bpp        = 32,
 139         .default_bpp    = 16,
 140         .xres           = 800,
 141         .yres           = 480,
 142 };
 143
 144 static struct fb_videomode hmt_lcd_timing = {
 145         .left_margin    = 8,
 146         .right_margin   = 13,
 147         .upper_margin   = 7,
 148         .lower_margin   = 5,
 149         .hsync_len      = 3,
 150         .vsync_len      = 1,
 151         .xres           = 800,
 152         .yres           = 480,
 153 };
 154
 155 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
 156 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
 157         .setup_gpio     = s3c64xx_fb_gpio_setup_24bpp,
 158         .vtiming        = &hmt_lcd_timing,
 159         .win[0]         = &hmt_fb_win0,
 160         .vidcon0        = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
 161         .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
 162 };
 163
 164 static struct mtd_partition hmt_nand_part[] = {
 165         [0] = {
 166                 .name   = "uboot",
 167                 .size   = SZ_512K,
 168                 .offset = 0,
 169         },
 170         [1] = {
 171                 .name   = "uboot-env1",
 172                 .size   = SZ_256K,
 173                 .offset = SZ_512K,
 174         },
 175         [2] = {
 176                 .name   = "uboot-env2",
 177                 .size   = SZ_256K,
 178                 .offset = SZ_512K + SZ_256K,
 179         },
 180         [3] = {
 181                 .name   = "kernel",
 182                 .size   = SZ_2M,
 183                 .offset = SZ_1M,
 184         },
 185         [4] = {
 186                 .name   = "rootfs",
 187                 .size   = MTDPART_SIZ_FULL,
 188                 .offset = SZ_1M + SZ_2M,
 189         },
 190 };
 191
 192 static struct s3c2410_nand_set hmt_nand_sets[] = {
 193         [0] = {
 194                 .name           = "nand",
 195                 .nr_chips       = 1,
 196                 .nr_partitions  = ARRAY_SIZE(hmt_nand_part),
 197                 .partitions     = hmt_nand_part,
 198         },
 199 };
 200
 201 static struct s3c2410_platform_nand hmt_nand_info = {
 202         .tacls          = 25,
 203         .twrph0         = 55,
 204         .twrph1         = 40,
 205         .nr_sets        = ARRAY_SIZE(hmt_nand_sets),
 206         .sets           = hmt_nand_sets,
 207         .ecc_mode       = NAND_ECC_SOFT,
 208 };
 209
 210 static struct gpio_led hmt_leds[] = {
 211         { /* left function keys */
 212                 .name                   = "left:blue",
 213                 .gpio                   = S3C64XX_GPO(12),
 214                 .default_trigger        = "default-on",
 215         },
 216         { /* right function keys - red */
 217                 .name                   = "right:red",
 218                 .gpio                   = S3C64XX_GPO(13),
 219         },
 220         { /* right function keys - green */
 221                 .name                   = "right:green",
 222                 .gpio                   = S3C64XX_GPO(14),
 223         },
 224         { /* right function keys - blue */
 225                 .name                   = "right:blue",
 226                 .gpio                   = S3C64XX_GPO(15),
 227                 .default_trigger        = "default-on",
 228         },
 229 };
 230
 231 static struct gpio_led_platform_data hmt_led_data = {
 232         .num_leds = ARRAY_SIZE(hmt_leds),
 233         .leds = hmt_leds,
 234 };
 235
 236 static struct platform_device hmt_leds_device = {
 237         .name                   = "leds-gpio",
 238         .id                     = -1,
 239         .dev.platform_data      = &hmt_led_data,
 240 };
 241
 242 static struct map_desc hmt_iodesc[] = {};
 243
 244 static struct platform_device *hmt_devices[] __initdata = {
 245         &s3c_device_i2c0,
 246         &s3c_device_nand,
 247         &s3c_device_fb,
 248         &s3c_device_ohci,
 249         &samsung_device_pwm,
 250         &hmt_backlight_device,
 251         &hmt_leds_device,
 252 };
 253
 254 static void __init hmt_map_io(void)
 255 {
 256         s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
 257         s3c64xx_set_xtal_freq(12000000);
 258         s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
 259         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 260 }
 261
 262 static void __init hmt_machine_init(void)
 263 {
 264         s3c_i2c0_set_platdata(NULL);
 265         s3c_fb_set_platdata(&hmt_lcd_pdata);
 266         s3c_nand_set_platdata(&hmt_nand_info);
 267
 268         gpio_request(S3C64XX_GPC(7), "usb power");
 269         gpio_direction_output(S3C64XX_GPC(7), 0);
 270         gpio_request(S3C64XX_GPM(0), "usb power");
 271         gpio_direction_output(S3C64XX_GPM(0), 1);
 272         gpio_request(S3C64XX_GPK(7), "usb power");
 273         gpio_direction_output(S3C64XX_GPK(7), 1);
 274         gpio_request(S3C64XX_GPF(13), "usb power");
 275         gpio_direction_output(S3C64XX_GPF(13), 1);
 276
 277         pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
 278         platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
 279 }
 280
 281 MACHINE_START(HMT, "Airgoo-HMT")
 282         /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
 283         .atag_offset    = 0x100,
 284         .nr_irqs        = S3C64XX_NR_IRQS,
 285         .init_irq       = s3c6410_init_irq,
 286         .map_io         = hmt_map_io,
 287         .init_machine   = hmt_machine_init,
 288         .init_time      = samsung_timer_init,
 289         .restart        = s3c64xx_restart,
 290 MACHINE_END