arch/arm/mach-s3c64xx/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 <mach/hardware.h>
  29 #include <mach/map.h>
  30 #include <mach/irqs.h>
  31
  32 #include <asm/irq.h>
  33 #include <asm/mach-types.h>
  34
  35 #include <linux/platform_data/i2c-s3c2410.h>
  36 #include <mach/gpio-samsung.h>
  37 #include <plat/fb.h>
  38 #include <linux/platform_data/mtd-nand-s3c2410.h>
  39
  40 #include <plat/devs.h>
  41 #include <plat/cpu.h>
  42 #include <plat/samsung-time.h>
  43
  44 #include "common.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 struct pwm_lookup hmt_pwm_lookup[] = {
  75         PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
  76                    1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
  77 };
  78
  79 static int hmt_bl_init(struct device *dev)
  80 {
  81         int ret;
  82
  83         ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
  84         if (!ret)
  85                 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
  86
  87         return ret;
  88 }
  89
  90 static int hmt_bl_notify(struct device *dev, int brightness)
  91 {
  92         /*
  93          * translate from CIELUV/CIELAB L*->brightness, E.G. from
  94          * perceived luminance to light output. Assumes range 0..25600
  95          */
  96         if (brightness < 0x800) {
  97                 /* Y = Yn * L / 903.3 */
  98                 brightness = (100*256 * brightness + 231245/2) / 231245;
  99         } else {
 100                 /* Y = Yn * ((L + 16) / 116 )^3 */
 101                 int t = (brightness*4 + 16*1024 + 58)/116;
 102                 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
 103         }
 104
 105         gpio_set_value(S3C64XX_GPB(4), brightness);
 106
 107         return brightness;
 108 }
 109
 110 static void hmt_bl_exit(struct device *dev)
 111 {
 112         gpio_free(S3C64XX_GPB(4));
 113 }
 114
 115 static struct platform_pwm_backlight_data hmt_backlight_data = {
 116         .max_brightness = 100 * 256,
 117         .dft_brightness = 40 * 256,
 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         .ecc_mode       = NAND_ECC_SOFT,
 203 };
 204
 205 static struct gpio_led hmt_leds[] = {
 206         { /* left function keys */
 207                 .name                   = "left:blue",
 208                 .gpio                   = S3C64XX_GPO(12),
 209                 .default_trigger        = "default-on",
 210         },
 211         { /* right function keys - red */
 212                 .name                   = "right:red",
 213                 .gpio                   = S3C64XX_GPO(13),
 214         },
 215         { /* right function keys - green */
 216                 .name                   = "right:green",
 217                 .gpio                   = S3C64XX_GPO(14),
 218         },
 219         { /* right function keys - blue */
 220                 .name                   = "right:blue",
 221                 .gpio                   = S3C64XX_GPO(15),
 222                 .default_trigger        = "default-on",
 223         },
 224 };
 225
 226 static struct gpio_led_platform_data hmt_led_data = {
 227         .num_leds = ARRAY_SIZE(hmt_leds),
 228         .leds = hmt_leds,
 229 };
 230
 231 static struct platform_device hmt_leds_device = {
 232         .name                   = "leds-gpio",
 233         .id                     = -1,
 234         .dev.platform_data      = &hmt_led_data,
 235 };
 236
 237 static struct map_desc hmt_iodesc[] = {};
 238
 239 static struct platform_device *hmt_devices[] __initdata = {
 240         &s3c_device_i2c0,
 241         &s3c_device_nand,
 242         &s3c_device_fb,
 243         &s3c_device_ohci,
 244         &samsung_device_pwm,
 245         &hmt_backlight_device,
 246         &hmt_leds_device,
 247 };
 248
 249 static void __init hmt_map_io(void)
 250 {
 251         s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
 252         s3c64xx_set_xtal_freq(12000000);
 253         s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
 254         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 255 }
 256
 257 static void __init hmt_machine_init(void)
 258 {
 259         s3c_i2c0_set_platdata(NULL);
 260         s3c_fb_set_platdata(&hmt_lcd_pdata);
 261         s3c_nand_set_platdata(&hmt_nand_info);
 262
 263         gpio_request(S3C64XX_GPC(7), "usb power");
 264         gpio_direction_output(S3C64XX_GPC(7), 0);
 265         gpio_request(S3C64XX_GPM(0), "usb power");
 266         gpio_direction_output(S3C64XX_GPM(0), 1);
 267         gpio_request(S3C64XX_GPK(7), "usb power");
 268         gpio_direction_output(S3C64XX_GPK(7), 1);
 269         gpio_request(S3C64XX_GPF(13), "usb power");
 270         gpio_direction_output(S3C64XX_GPF(13), 1);
 271
 272         pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
 273         platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
 274 }
 275
 276 MACHINE_START(HMT, "Airgoo-HMT")
 277         /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
 278         .atag_offset    = 0x100,
 279         .nr_irqs        = S3C64XX_NR_IRQS,
 280         .init_irq       = s3c6410_init_irq,
 281         .map_io         = hmt_map_io,
 282         .init_machine   = hmt_machine_init,
 283         .init_time      = samsung_timer_init,
 284         .restart        = s3c64xx_restart,
 285 MACHINE_END