Linux Kernel iMX6
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/* mach-hmt.c - Platform code for Airgoo HMT
*
* Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/pwm_backlight.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <video/samsung_fimd.h>
#include <mach/hardware.h>
#include <mach/map.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <plat/regs-serial.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <mach/gpio-samsung.h>
#include <plat/fb.h>
#include <linux/platform_data/mtd-nand-s3c2410.h>
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/samsung-time.h>
#include "common.h"
#define UCON S3C2410_UCON_DEFAULT
#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
[0] = {
.hwport = 0,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[1] = {
.hwport = 1,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[2] = {
.hwport = 2,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
};
static int hmt_bl_init(struct device *dev)
{
int ret;
ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
if (!ret)
ret = gpio_direction_output(S3C64XX_GPB(4), 0);
return ret;
}
static int hmt_bl_notify(struct device *dev, int brightness)
{
/*
* translate from CIELUV/CIELAB L*->brightness, E.G. from
* perceived luminance to light output. Assumes range 0..25600
*/
if (brightness < 0x800) {
/* Y = Yn * L / 903.3 */
brightness = (100*256 * brightness + 231245/2) / 231245;
} else {
/* Y = Yn * ((L + 16) / 116 )^3 */
int t = (brightness*4 + 16*1024 + 58)/116;
brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
}
gpio_set_value(S3C64XX_GPB(4), brightness);
return brightness;
}
static void hmt_bl_exit(struct device *dev)
{
gpio_free(S3C64XX_GPB(4));
}
static struct platform_pwm_backlight_data hmt_backlight_data = {
.pwm_id = 1,
.max_brightness = 100 * 256,
.dft_brightness = 40 * 256,
.pwm_period_ns = 1000000000 / (100 * 256 * 20),
.enable_gpio = -1,
.init = hmt_bl_init,
.notify = hmt_bl_notify,
.exit = hmt_bl_exit,
};
static struct platform_device hmt_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &samsung_device_pwm.dev,
.platform_data = &hmt_backlight_data,
},
};
static struct s3c_fb_pd_win hmt_fb_win0 = {
.max_bpp = 32,
.default_bpp = 16,
.xres = 800,
.yres = 480,
};
static struct fb_videomode hmt_lcd_timing = {
.left_margin = 8,
.right_margin = 13,
.upper_margin = 7,
.lower_margin = 5,
.hsync_len = 3,
.vsync_len = 1,
.xres = 800,
.yres = 480,
};
/* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
.setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
.vtiming = &hmt_lcd_timing,
.win[0] = &hmt_fb_win0,
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
};
static struct mtd_partition hmt_nand_part[] = {
[0] = {
.name = "uboot",
.size = SZ_512K,
.offset = 0,
},
[1] = {
.name = "uboot-env1",
.size = SZ_256K,
.offset = SZ_512K,
},
[2] = {
.name = "uboot-env2",
.size = SZ_256K,
.offset = SZ_512K + SZ_256K,
},
[3] = {
.name = "kernel",
.size = SZ_2M,
.offset = SZ_1M,
},
[4] = {
.name = "rootfs",
.size = MTDPART_SIZ_FULL,
.offset = SZ_1M + SZ_2M,
},
};
static struct s3c2410_nand_set hmt_nand_sets[] = {
[0] = {
.name = "nand",
.nr_chips = 1,
.nr_partitions = ARRAY_SIZE(hmt_nand_part),
.partitions = hmt_nand_part,
},
};
static struct s3c2410_platform_nand hmt_nand_info = {
.tacls = 25,
.twrph0 = 55,
.twrph1 = 40,
.nr_sets = ARRAY_SIZE(hmt_nand_sets),
.sets = hmt_nand_sets,
};
static struct gpio_led hmt_leds[] = {
{ /* left function keys */
.name = "left:blue",
.gpio = S3C64XX_GPO(12),
.default_trigger = "default-on",
},
{ /* right function keys - red */
.name = "right:red",
.gpio = S3C64XX_GPO(13),
},
{ /* right function keys - green */
.name = "right:green",
.gpio = S3C64XX_GPO(14),
},
{ /* right function keys - blue */
.name = "right:blue",
.gpio = S3C64XX_GPO(15),
.default_trigger = "default-on",
},
};
static struct gpio_led_platform_data hmt_led_data = {
.num_leds = ARRAY_SIZE(hmt_leds),
.leds = hmt_leds,
};
static struct platform_device hmt_leds_device = {
.name = "leds-gpio",
.id = -1,
.dev.platform_data = &hmt_led_data,
};
static struct map_desc hmt_iodesc[] = {};
static struct platform_device *hmt_devices[] __initdata = {
&s3c_device_i2c0,
&s3c_device_nand,
&s3c_device_fb,
&s3c_device_ohci,
&samsung_device_pwm,
&hmt_backlight_device,
&hmt_leds_device,
};
static void __init hmt_map_io(void)
{
s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
s3c64xx_set_xtal_freq(12000000);
s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
}
static void __init hmt_machine_init(void)
{
s3c_i2c0_set_platdata(NULL);
s3c_fb_set_platdata(&hmt_lcd_pdata);
s3c_nand_set_platdata(&hmt_nand_info);
gpio_request(S3C64XX_GPC(7), "usb power");
gpio_direction_output(S3C64XX_GPC(7), 0);
gpio_request(S3C64XX_GPM(0), "usb power");
gpio_direction_output(S3C64XX_GPM(0), 1);
gpio_request(S3C64XX_GPK(7), "usb power");
gpio_direction_output(S3C64XX_GPK(7), 1);
gpio_request(S3C64XX_GPF(13), "usb power");
gpio_direction_output(S3C64XX_GPF(13), 1);
platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
}
MACHINE_START(HMT, "Airgoo-HMT")
/* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
.atag_offset = 0x100,
.init_irq = s3c6410_init_irq,
.map_io = hmt_map_io,
.init_machine = hmt_machine_init,
.init_late = s3c64xx_init_late,
.init_time = samsung_timer_init,
.restart = s3c64xx_restart,
MACHINE_END