arch/arm/mach-s3c/mach-hmt.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // mach-hmt.c - Platform code for Airgoo HMT
   4 //
   5 // Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
   6
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9 #include <linux/serial_core.h>
  10 #include <linux/serial_s3c.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/io.h>
  13 #include <linux/i2c.h>
  14 #include <linux/fb.h>
  15 #include <linux/gpio.h>
  16 #include <linux/delay.h>
  17 #include <linux/leds.h>
  18 #include <linux/pwm.h>
  19 #include <linux/pwm_backlight.h>
  20 #include <linux/mtd/mtd.h>
  21 #include <linux/mtd/partitions.h>
  22
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include <video/samsung_fimd.h>
  28 #include "map.h"
  29 #include <mach/irqs.h>
  30
  31 #include <asm/irq.h>
  32 #include <asm/mach-types.h>
  33
  34 #include <linux/platform_data/i2c-s3c2410.h>
  35 #include "gpio-samsung.h"
  36 #include "fb.h"
  37 #include <linux/platform_data/mtd-nand-s3c2410.h>
  38
  39 #include "devs.h"
  40 #include "cpu.h"
  41
  42 #include "s3c64xx.h"
  43
  44 #define UCON S3C2410_UCON_DEFAULT
  45 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
  46 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
  47
  48 static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
  49         [0] = {
  50                 .hwport      = 0,
  51                 .flags       = 0,
  52                 .ucon        = UCON,
  53                 .ulcon       = ULCON,
  54                 .ufcon       = UFCON,
  55         },
  56         [1] = {
  57                 .hwport      = 1,
  58                 .flags       = 0,
  59                 .ucon        = UCON,
  60                 .ulcon       = ULCON,
  61                 .ufcon       = UFCON,
  62         },
  63         [2] = {
  64                 .hwport      = 2,
  65                 .flags       = 0,
  66                 .ucon        = UCON,
  67                 .ulcon       = ULCON,
  68                 .ufcon       = UFCON,
  69         },
  70 };
  71
  72 static struct pwm_lookup hmt_pwm_lookup[] = {
  73         PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
  74                    1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
  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         .max_brightness = 100 * 256,
 115         .dft_brightness = 40 * 256,
 116         .init           = hmt_bl_init,
 117         .notify         = hmt_bl_notify,
 118         .exit           = hmt_bl_exit,
 119
 120 };
 121
 122 static struct platform_device hmt_backlight_device = {
 123         .name           = "pwm-backlight",
 124         .dev            = {
 125                 .parent = &samsung_device_pwm.dev,
 126                 .platform_data = &hmt_backlight_data,
 127         },
 128 };
 129
 130 static struct s3c_fb_pd_win hmt_fb_win0 = {
 131         .max_bpp        = 32,
 132         .default_bpp    = 16,
 133         .xres           = 800,
 134         .yres           = 480,
 135 };
 136
 137 static struct fb_videomode hmt_lcd_timing = {
 138         .left_margin    = 8,
 139         .right_margin   = 13,
 140         .upper_margin   = 7,
 141         .lower_margin   = 5,
 142         .hsync_len      = 3,
 143         .vsync_len      = 1,
 144         .xres           = 800,
 145         .yres           = 480,
 146 };
 147
 148 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
 149 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
 150         .setup_gpio     = s3c64xx_fb_gpio_setup_24bpp,
 151         .vtiming        = &hmt_lcd_timing,
 152         .win[0]         = &hmt_fb_win0,
 153         .vidcon0        = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
 154         .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
 155 };
 156
 157 static struct mtd_partition hmt_nand_part[] = {
 158         [0] = {
 159                 .name   = "uboot",
 160                 .size   = SZ_512K,
 161                 .offset = 0,
 162         },
 163         [1] = {
 164                 .name   = "uboot-env1",
 165                 .size   = SZ_256K,
 166                 .offset = SZ_512K,
 167         },
 168         [2] = {
 169                 .name   = "uboot-env2",
 170                 .size   = SZ_256K,
 171                 .offset = SZ_512K + SZ_256K,
 172         },
 173         [3] = {
 174                 .name   = "kernel",
 175                 .size   = SZ_2M,
 176                 .offset = SZ_1M,
 177         },
 178         [4] = {
 179                 .name   = "rootfs",
 180                 .size   = MTDPART_SIZ_FULL,
 181                 .offset = SZ_1M + SZ_2M,
 182         },
 183 };
 184
 185 static struct s3c2410_nand_set hmt_nand_sets[] = {
 186         [0] = {
 187                 .name           = "nand",
 188                 .nr_chips       = 1,
 189                 .nr_partitions  = ARRAY_SIZE(hmt_nand_part),
 190                 .partitions     = hmt_nand_part,
 191         },
 192 };
 193
 194 static struct s3c2410_platform_nand hmt_nand_info = {
 195         .tacls          = 25,
 196         .twrph0         = 55,
 197         .twrph1         = 40,
 198         .nr_sets        = ARRAY_SIZE(hmt_nand_sets),
 199         .sets           = hmt_nand_sets,
 200         .engine_type    = NAND_ECC_ENGINE_TYPE_SOFT,
 201 };
 202
 203 static struct gpio_led hmt_leds[] = {
 204         { /* left function keys */
 205                 .name                   = "left:blue",
 206                 .gpio                   = S3C64XX_GPO(12),
 207                 .default_trigger        = "default-on",
 208         },
 209         { /* right function keys - red */
 210                 .name                   = "right:red",
 211                 .gpio                   = S3C64XX_GPO(13),
 212         },
 213         { /* right function keys - green */
 214                 .name                   = "right:green",
 215                 .gpio                   = S3C64XX_GPO(14),
 216         },
 217         { /* right function keys - blue */
 218                 .name                   = "right:blue",
 219                 .gpio                   = S3C64XX_GPO(15),
 220                 .default_trigger        = "default-on",
 221         },
 222 };
 223
 224 static struct gpio_led_platform_data hmt_led_data = {
 225         .num_leds = ARRAY_SIZE(hmt_leds),
 226         .leds = hmt_leds,
 227 };
 228
 229 static struct platform_device hmt_leds_device = {
 230         .name                   = "leds-gpio",
 231         .id                     = -1,
 232         .dev.platform_data      = &hmt_led_data,
 233 };
 234
 235 static struct map_desc hmt_iodesc[] = {};
 236
 237 static struct platform_device *hmt_devices[] __initdata = {
 238         &s3c_device_i2c0,
 239         &s3c_device_nand,
 240         &s3c_device_fb,
 241         &s3c_device_ohci,
 242         &samsung_device_pwm,
 243         &hmt_backlight_device,
 244         &hmt_leds_device,
 245 };
 246
 247 static void __init hmt_map_io(void)
 248 {
 249         s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
 250         s3c64xx_set_xtal_freq(12000000);
 251         s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
 252         s3c64xx_set_timer_source(S3C64XX_PWM3, S3C64XX_PWM4);
 253 }
 254
 255 static void __init hmt_machine_init(void)
 256 {
 257         s3c_i2c0_set_platdata(NULL);
 258         s3c_fb_set_platdata(&hmt_lcd_pdata);
 259         s3c_nand_set_platdata(&hmt_nand_info);
 260
 261         gpio_request(S3C64XX_GPC(7), "usb power");
 262         gpio_direction_output(S3C64XX_GPC(7), 0);
 263         gpio_request(S3C64XX_GPM(0), "usb power");
 264         gpio_direction_output(S3C64XX_GPM(0), 1);
 265         gpio_request(S3C64XX_GPK(7), "usb power");
 266         gpio_direction_output(S3C64XX_GPK(7), 1);
 267         gpio_request(S3C64XX_GPF(13), "usb power");
 268         gpio_direction_output(S3C64XX_GPF(13), 1);
 269
 270         pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
 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         .nr_irqs        = S3C64XX_NR_IRQS,
 278         .init_irq       = s3c6410_init_irq,
 279         .map_io         = hmt_map_io,
 280         .init_machine   = hmt_machine_init,
 281         .init_time      = s3c64xx_timer_init,
 282 MACHINE_END