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