Linux Kernel iMX6
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/*
* linux/arch/arm/mach-s3c64xx/mach-smartq.c
*
* Copyright (C) 2010 Maurus Cuelenaere
*
* 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/delay.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pwm_backlight.h>
#include <linux/serial_core.h>
#include <linux/spi/spi_gpio.h>
#include <linux/usb/gpio_vbus.h>
#include <linux/platform_data/s3c-hsotg.h>
#include <asm/mach-types.h>
#include <asm/mach/map.h>
#include <mach/map.h>
#include <mach/regs-gpio.h>
#include <mach/gpio-samsung.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <plat/gpio-cfg.h>
#include <linux/platform_data/hwmon-s3c.h>
#include <plat/regs-serial.h>
#include <linux/platform_data/usb-ohci-s3c2410.h>
#include <plat/sdhci.h>
#include <linux/platform_data/touchscreen-s3c2410.h>
#include <video/platform_lcd.h>
#include <plat/samsung-time.h>
#include "common.h"
#include "regs-modem.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 smartq_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 void smartq_usb_host_powercontrol(int port, int to)
{
pr_debug("%s(%d, %d)\n", __func__, port, to);
if (port == 0) {
gpio_set_value(S3C64XX_GPL(0), to);
gpio_set_value(S3C64XX_GPL(1), to);
}
}
static irqreturn_t smartq_usb_host_ocirq(int irq, void *pw)
{
struct s3c2410_hcd_info *info = pw;
if (gpio_get_value(S3C64XX_GPL(10)) == 0) {
pr_debug("%s: over-current irq (oc detected)\n", __func__);
s3c2410_usb_report_oc(info, 3);
} else {
pr_debug("%s: over-current irq (oc cleared)\n", __func__);
s3c2410_usb_report_oc(info, 0);
}
return IRQ_HANDLED;
}
static void smartq_usb_host_enableoc(struct s3c2410_hcd_info *info, int on)
{
int ret;
/* This isn't present on a SmartQ 5 board */
if (machine_is_smartq5())
return;
if (on) {
ret = request_irq(gpio_to_irq(S3C64XX_GPL(10)),
smartq_usb_host_ocirq, IRQF_DISABLED |
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"USB host overcurrent", info);
if (ret != 0)
pr_err("failed to request usb oc irq: %d\n", ret);
} else {
free_irq(gpio_to_irq(S3C64XX_GPL(10)), info);
}
}
static struct s3c2410_hcd_info smartq_usb_host_info = {
.port[0] = {
.flags = S3C_HCDFLG_USED
},
.port[1] = {
.flags = 0
},
.power_control = smartq_usb_host_powercontrol,
.enable_oc = smartq_usb_host_enableoc,
};
static struct gpio_vbus_mach_info smartq_usb_otg_vbus_pdata = {
.gpio_vbus = S3C64XX_GPL(9),
.gpio_pullup = -1,
.gpio_vbus_inverted = true,
};
static struct platform_device smartq_usb_otg_vbus_dev = {
.name = "gpio-vbus",
.dev.platform_data = &smartq_usb_otg_vbus_pdata,
};
static int smartq_bl_init(struct device *dev)
{
s3c_gpio_cfgpin(S3C64XX_GPF(15), S3C_GPIO_SFN(2));
return 0;
}
static struct platform_pwm_backlight_data smartq_backlight_data = {
.pwm_id = 1,
.max_brightness = 1000,
.dft_brightness = 600,
.pwm_period_ns = 1000000000 / (1000 * 20),
.enable_gpio = -1,
.init = smartq_bl_init,
};
static struct platform_device smartq_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &samsung_device_pwm.dev,
.platform_data = &smartq_backlight_data,
},
};
static struct s3c2410_ts_mach_info smartq_touchscreen_pdata __initdata = {
.delay = 65535,
.presc = 99,
.oversampling_shift = 4,
};
static struct s3c_sdhci_platdata smartq_internal_hsmmc_pdata = {
.max_width = 4,
.cd_type = S3C_SDHCI_CD_PERMANENT,
};
static struct s3c_hwmon_pdata smartq_hwmon_pdata __initdata = {
/* Battery voltage (?-4.2V) */
.in[0] = &(struct s3c_hwmon_chcfg) {
.name = "smartq:battery-voltage",
.mult = 3300,
.div = 2048,
},
/* Reference voltage (1.2V) */
.in[1] = &(struct s3c_hwmon_chcfg) {
.name = "smartq:reference-voltage",
.mult = 3300,
.div = 4096,
},
};
static struct s3c_hsotg_plat smartq_hsotg_pdata;
static int __init smartq_lcd_setup_gpio(void)
{
int ret;
ret = gpio_request(S3C64XX_GPM(3), "LCD power");
if (ret < 0)
return ret;
/* turn power off */
gpio_direction_output(S3C64XX_GPM(3), 0);
return 0;
}
/* GPM0 -> CS */
static struct spi_gpio_platform_data smartq_lcd_control = {
.sck = S3C64XX_GPM(1),
.mosi = S3C64XX_GPM(2),
.miso = S3C64XX_GPM(2),
};
static struct platform_device smartq_lcd_control_device = {
.name = "spi-gpio",
.id = 1,
.dev.platform_data = &smartq_lcd_control,
};
static void smartq_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
{
gpio_direction_output(S3C64XX_GPM(3), power);
}
static struct plat_lcd_data smartq_lcd_power_data = {
.set_power = smartq_lcd_power_set,
};
static struct platform_device smartq_lcd_power_device = {
.name = "platform-lcd",
.dev.parent = &s3c_device_fb.dev,
.dev.platform_data = &smartq_lcd_power_data,
};
static struct i2c_board_info smartq_i2c_devs[] __initdata = {
{ I2C_BOARD_INFO("wm8987", 0x1a), },
};
static struct platform_device *smartq_devices[] __initdata = {
&s3c_device_hsmmc1, /* Init iNAND first, ... */
&s3c_device_hsmmc0, /* ... then the external SD card */
&s3c_device_hsmmc2,
&s3c_device_adc,
&s3c_device_fb,
&s3c_device_hwmon,
&s3c_device_i2c0,
&s3c_device_ohci,
&s3c_device_rtc,
&samsung_device_pwm,
&s3c_device_ts,
&s3c_device_usb_hsotg,
&s3c64xx_device_iis0,
&smartq_backlight_device,
&smartq_lcd_control_device,
&smartq_lcd_power_device,
&smartq_usb_otg_vbus_dev,
};
static void __init smartq_lcd_mode_set(void)
{
u32 tmp;
/* set the LCD type */
tmp = __raw_readl(S3C64XX_SPCON);
tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
__raw_writel(tmp, S3C64XX_SPCON);
/* remove the LCD bypass */
tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
tmp &= ~MIFPCON_LCD_BYPASS;
__raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
}
static void smartq_power_off(void)
{
gpio_direction_output(S3C64XX_GPK(15), 1);
}
static int __init smartq_power_off_init(void)
{
int ret;
ret = gpio_request(S3C64XX_GPK(15), "Power control");
if (ret < 0) {
pr_err("%s: failed to get GPK15\n", __func__);
return ret;
}
/* leave power on */
gpio_direction_output(S3C64XX_GPK(15), 0);
pm_power_off = smartq_power_off;
return ret;
}
static int __init smartq_usb_host_init(void)
{
int ret;
ret = gpio_request(S3C64XX_GPL(0), "USB power control");
if (ret < 0) {
pr_err("%s: failed to get GPL0\n", __func__);
return ret;
}
ret = gpio_request(S3C64XX_GPL(1), "USB host power control");
if (ret < 0) {
pr_err("%s: failed to get GPL1\n", __func__);
goto err;
}
if (!machine_is_smartq5()) {
/* This isn't present on a SmartQ 5 board */
ret = gpio_request(S3C64XX_GPL(10), "USB host overcurrent");
if (ret < 0) {
pr_err("%s: failed to get GPL10\n", __func__);
goto err2;
}
}
/* turn power off */
gpio_direction_output(S3C64XX_GPL(0), 0);
gpio_direction_output(S3C64XX_GPL(1), 0);
if (!machine_is_smartq5())
gpio_direction_input(S3C64XX_GPL(10));
s3c_device_ohci.dev.platform_data = &smartq_usb_host_info;
return 0;
err2:
gpio_free(S3C64XX_GPL(1));
err:
gpio_free(S3C64XX_GPL(0));
return ret;
}
static int __init smartq_wifi_init(void)
{
int ret;
ret = gpio_request(S3C64XX_GPK(1), "wifi control");
if (ret < 0) {
pr_err("%s: failed to get GPK1\n", __func__);
return ret;
}
ret = gpio_request(S3C64XX_GPK(2), "wifi reset");
if (ret < 0) {
pr_err("%s: failed to get GPK2\n", __func__);
gpio_free(S3C64XX_GPK(1));
return ret;
}
/* turn power on */
gpio_direction_output(S3C64XX_GPK(1), 1);
/* reset device */
gpio_direction_output(S3C64XX_GPK(2), 0);
mdelay(100);
gpio_set_value(S3C64XX_GPK(2), 1);
gpio_direction_input(S3C64XX_GPK(2));
return 0;
}
static struct map_desc smartq_iodesc[] __initdata = {};
void __init smartq_map_io(void)
{
s3c64xx_init_io(smartq_iodesc, ARRAY_SIZE(smartq_iodesc));
s3c64xx_set_xtal_freq(12000000);
s3c64xx_set_xusbxti_freq(12000000);
s3c24xx_init_uarts(smartq_uartcfgs, ARRAY_SIZE(smartq_uartcfgs));
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
smartq_lcd_mode_set();
}
void __init smartq_machine_init(void)
{
s3c_i2c0_set_platdata(NULL);
s3c_hsotg_set_platdata(&smartq_hsotg_pdata);
s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
s3c24xx_ts_set_platdata(&smartq_touchscreen_pdata);
i2c_register_board_info(0, smartq_i2c_devs,
ARRAY_SIZE(smartq_i2c_devs));
WARN_ON(smartq_lcd_setup_gpio());
WARN_ON(smartq_power_off_init());
WARN_ON(smartq_usb_host_init());
WARN_ON(smartq_wifi_init());
platform_add_devices(smartq_devices, ARRAY_SIZE(smartq_devices));
}