Linux Kernel iMX6
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/* Machine specific code for the Acer n30, Acer N35, Navman PiN 570,
* Yakumo AlphaX and Airis NC05 PDAs.
*
* Copyright (c) 2003-2005 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* Copyright (c) 2005-2008 Christer Weinigel <christer@weinigel.se>
*
* There is a wiki with more information about the n30 port at
* http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
*
* 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/types.h>
#include <linux/gpio_keys.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/timer.h>
#include <linux/io.h>
#include <linux/mmc/host.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <mach/fb.h>
#include <linux/platform_data/leds-s3c24xx.h>
#include <mach/regs-gpio.h>
#include <mach/regs-lcd.h>
#include <mach/gpio-samsung.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <plat/regs-serial.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <linux/platform_data/mmc-s3cmci.h>
#include <linux/platform_data/usb-s3c2410_udc.h>
#include <plat/samsung-time.h>
#include "common.h"
static struct map_desc n30_iodesc[] __initdata = {
/* nothing here yet */
};
static struct s3c2410_uartcfg n30_uartcfgs[] = {
/* Normal serial port */
[0] = {
.hwport = 0,
.flags = 0,
.ucon = 0x2c5,
.ulcon = 0x03,
.ufcon = 0x51,
},
/* IR port */
[1] = {
.hwport = 1,
.flags = 0,
.uart_flags = UPF_CONS_FLOW,
.ucon = 0x2c5,
.ulcon = 0x43,
.ufcon = 0x51,
},
/* On the N30 the bluetooth controller is connected here.
* On the N35 and variants the GPS receiver is connected here. */
[2] = {
.hwport = 2,
.flags = 0,
.ucon = 0x2c5,
.ulcon = 0x03,
.ufcon = 0x51,
},
};
static struct s3c2410_udc_mach_info n30_udc_cfg __initdata = {
.vbus_pin = S3C2410_GPG(1),
.vbus_pin_inverted = 0,
.pullup_pin = S3C2410_GPB(3),
};
static struct gpio_keys_button n30_buttons[] = {
{
.gpio = S3C2410_GPF(0),
.code = KEY_POWER,
.desc = "Power",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(9),
.code = KEY_UP,
.desc = "Thumbwheel Up",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(8),
.code = KEY_DOWN,
.desc = "Thumbwheel Down",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(7),
.code = KEY_ENTER,
.desc = "Thumbwheel Press",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(7),
.code = KEY_HOMEPAGE,
.desc = "Home",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(6),
.code = KEY_CALENDAR,
.desc = "Calendar",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(5),
.code = KEY_ADDRESSBOOK,
.desc = "Contacts",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(4),
.code = KEY_MAIL,
.desc = "Mail",
.active_low = 0,
},
};
static struct gpio_keys_platform_data n30_button_data = {
.buttons = n30_buttons,
.nbuttons = ARRAY_SIZE(n30_buttons),
};
static struct platform_device n30_button_device = {
.name = "gpio-keys",
.id = -1,
.dev = {
.platform_data = &n30_button_data,
}
};
static struct gpio_keys_button n35_buttons[] = {
{
.gpio = S3C2410_GPF(0),
.code = KEY_POWER,
.type = EV_PWR,
.desc = "Power",
.active_low = 0,
.wakeup = 1,
},
{
.gpio = S3C2410_GPG(9),
.code = KEY_UP,
.desc = "Joystick Up",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(8),
.code = KEY_DOWN,
.desc = "Joystick Down",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(6),
.code = KEY_DOWN,
.desc = "Joystick Left",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(5),
.code = KEY_DOWN,
.desc = "Joystick Right",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(7),
.code = KEY_ENTER,
.desc = "Joystick Press",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(7),
.code = KEY_HOMEPAGE,
.desc = "Home",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(6),
.code = KEY_CALENDAR,
.desc = "Calendar",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(5),
.code = KEY_ADDRESSBOOK,
.desc = "Contacts",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(4),
.code = KEY_MAIL,
.desc = "Mail",
.active_low = 0,
},
{
.gpio = S3C2410_GPF(3),
.code = SW_RADIO,
.desc = "GPS Antenna",
.active_low = 0,
},
{
.gpio = S3C2410_GPG(2),
.code = SW_HEADPHONE_INSERT,
.desc = "Headphone",
.active_low = 0,
},
};
static struct gpio_keys_platform_data n35_button_data = {
.buttons = n35_buttons,
.nbuttons = ARRAY_SIZE(n35_buttons),
};
static struct platform_device n35_button_device = {
.name = "gpio-keys",
.id = -1,
.num_resources = 0,
.dev = {
.platform_data = &n35_button_data,
}
};
/* This is the bluetooth LED on the device. */
static struct s3c24xx_led_platdata n30_blue_led_pdata = {
.name = "blue_led",
.gpio = S3C2410_GPG(6),
.def_trigger = "",
};
/* This is the blue LED on the device. Originally used to indicate GPS activity
* by flashing. */
static struct s3c24xx_led_platdata n35_blue_led_pdata = {
.name = "blue_led",
.gpio = S3C2410_GPD(8),
.def_trigger = "",
};
/* This LED is driven by the battery microcontroller, and is blinking
* red, blinking green or solid green when the battery is low,
* charging or full respectively. By driving GPD9 low, it's possible
* to force the LED to blink red, so call that warning LED. */
static struct s3c24xx_led_platdata n30_warning_led_pdata = {
.name = "warning_led",
.flags = S3C24XX_LEDF_ACTLOW,
.gpio = S3C2410_GPD(9),
.def_trigger = "",
};
static struct s3c24xx_led_platdata n35_warning_led_pdata = {
.name = "warning_led",
.flags = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
.gpio = S3C2410_GPD(9),
.def_trigger = "",
};
static struct platform_device n30_blue_led = {
.name = "s3c24xx_led",
.id = 1,
.dev = {
.platform_data = &n30_blue_led_pdata,
},
};
static struct platform_device n35_blue_led = {
.name = "s3c24xx_led",
.id = 1,
.dev = {
.platform_data = &n35_blue_led_pdata,
},
};
static struct platform_device n30_warning_led = {
.name = "s3c24xx_led",
.id = 2,
.dev = {
.platform_data = &n30_warning_led_pdata,
},
};
static struct platform_device n35_warning_led = {
.name = "s3c24xx_led",
.id = 2,
.dev = {
.platform_data = &n35_warning_led_pdata,
},
};
static struct s3c2410fb_display n30_display __initdata = {
.type = S3C2410_LCDCON1_TFT,
.width = 240,
.height = 320,
.pixclock = 170000,
.xres = 240,
.yres = 320,
.bpp = 16,
.left_margin = 3,
.right_margin = 40,
.hsync_len = 40,
.upper_margin = 2,
.lower_margin = 3,
.vsync_len = 2,
.lcdcon5 = S3C2410_LCDCON5_INVVLINE | S3C2410_LCDCON5_INVVFRAME,
};
static struct s3c2410fb_mach_info n30_fb_info __initdata = {
.displays = &n30_display,
.num_displays = 1,
.default_display = 0,
.lpcsel = 0x06,
};
static void n30_sdi_set_power(unsigned char power_mode, unsigned short vdd)
{
switch (power_mode) {
case MMC_POWER_ON:
case MMC_POWER_UP:
gpio_set_value(S3C2410_GPG(4), 1);
break;
case MMC_POWER_OFF:
default:
gpio_set_value(S3C2410_GPG(4), 0);
break;
}
}
static struct s3c24xx_mci_pdata n30_mci_cfg __initdata = {
.gpio_detect = S3C2410_GPF(1),
.gpio_wprotect = S3C2410_GPG(10),
.ocr_avail = MMC_VDD_32_33,
.set_power = n30_sdi_set_power,
};
static struct platform_device *n30_devices[] __initdata = {
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&s3c_device_ohci,
&s3c_device_rtc,
&s3c_device_usbgadget,
&s3c_device_sdi,
&n30_button_device,
&n30_blue_led,
&n30_warning_led,
};
static struct platform_device *n35_devices[] __initdata = {
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&s3c_device_rtc,
&s3c_device_usbgadget,
&s3c_device_sdi,
&n35_button_device,
&n35_blue_led,
&n35_warning_led,
};
static struct s3c2410_platform_i2c __initdata n30_i2ccfg = {
.flags = 0,
.slave_addr = 0x10,
.frequency = 10*1000,
};
/* Lots of hardcoded stuff, but it sets up the hardware in a useful
* state so that we can boot Linux directly from flash. */
static void __init n30_hwinit(void)
{
/* GPA0-11 special functions -- unknown what they do
* GPA12 N30 special function -- unknown what it does
* N35/PiN output -- unknown what it does
*
* A12 is nGCS1 on the N30 and an output on the N35/PiN. I
* don't think it does anything useful on the N30, so I ought
* to make it an output there too since it always driven to 0
* as far as I can tell. */
if (machine_is_n30())
__raw_writel(0x007fffff, S3C2410_GPACON);
if (machine_is_n35())
__raw_writel(0x007fefff, S3C2410_GPACON);
__raw_writel(0x00000000, S3C2410_GPADAT);
/* GPB0 TOUT0 backlight level
* GPB1 output 1=backlight on
* GPB2 output IrDA enable 0=transceiver enabled, 1=disabled
* GPB3 output USB D+ pull up 0=disabled, 1=enabled
* GPB4 N30 output -- unknown function
* N30/PiN GPS control 0=GPS enabled, 1=GPS disabled
* GPB5 output -- unknown function
* GPB6 input -- unknown function
* GPB7 output -- unknown function
* GPB8 output -- probably LCD driver enable
* GPB9 output -- probably LCD VSYNC driver enable
* GPB10 output -- probably LCD HSYNC driver enable
*/
__raw_writel(0x00154556, S3C2410_GPBCON);
__raw_writel(0x00000750, S3C2410_GPBDAT);
__raw_writel(0x00000073, S3C2410_GPBUP);
/* GPC0 input RS232 DCD/DSR/RI
* GPC1 LCD
* GPC2 output RS232 DTR?
* GPC3 input RS232 DCD/DSR/RI
* GPC4 LCD
* GPC5 output 0=NAND write enabled, 1=NAND write protect
* GPC6 input -- unknown function
* GPC7 input charger status 0=charger connected
* this input can be triggered by power on the USB device
* port too, but will go back to disconnected soon after.
* GPC8 N30/N35 output -- unknown function, always driven to 1
* PiN input -- unknown function, always read as 1
* Make it an input with a pull up for all models.
* GPC9-15 LCD
*/
__raw_writel(0xaaa80618, S3C2410_GPCCON);
__raw_writel(0x0000014c, S3C2410_GPCDAT);
__raw_writel(0x0000fef2, S3C2410_GPCUP);
/* GPD0 input -- unknown function
* GPD1-D7 LCD
* GPD8 N30 output -- unknown function
* N35/PiN output 1=GPS LED on
* GPD9 output 0=power led blinks red, 1=normal power led function
* GPD10 output -- unknown function
* GPD11-15 LCD drivers
*/
__raw_writel(0xaa95aaa4, S3C2410_GPDCON);
__raw_writel(0x00000601, S3C2410_GPDDAT);
__raw_writel(0x0000fbfe, S3C2410_GPDUP);
/* GPE0-4 I2S audio bus
* GPE5-10 SD/MMC bus
* E11-13 outputs -- unknown function, probably power management
* E14-15 I2C bus connected to the battery controller
*/
__raw_writel(0xa56aaaaa, S3C2410_GPECON);
__raw_writel(0x0000efc5, S3C2410_GPEDAT);
__raw_writel(0x0000f81f, S3C2410_GPEUP);
/* GPF0 input 0=power button pressed
* GPF1 input SD/MMC switch 0=card present
* GPF2 N30 1=reset button pressed (inverted compared to the rest)
* N35/PiN 0=reset button pressed
* GPF3 N30/PiN input -- unknown function
* N35 input GPS antenna position, 0=antenna closed, 1=open
* GPF4 input 0=button 4 pressed
* GPF5 input 0=button 3 pressed
* GPF6 input 0=button 2 pressed
* GPF7 input 0=button 1 pressed
*/
__raw_writel(0x0000aaaa, S3C2410_GPFCON);
__raw_writel(0x00000000, S3C2410_GPFDAT);
__raw_writel(0x000000ff, S3C2410_GPFUP);
/* GPG0 input RS232 DCD/DSR/RI
* GPG1 input 1=USB gadget port has power from a host
* GPG2 N30 input -- unknown function
* N35/PiN input 0=headphones plugged in, 1=not plugged in
* GPG3 N30 output -- unknown function
* N35/PiN input with unknown function
* GPG4 N30 output 0=MMC enabled, 1=MMC disabled
* GPG5 N30 output 0=BlueTooth chip disabled, 1=enabled
* N35/PiN input joystick right
* GPG6 N30 output 0=blue led on, 1=off
* N35/PiN input joystick left
* GPG7 input 0=thumbwheel pressed
* GPG8 input 0=thumbwheel down
* GPG9 input 0=thumbwheel up
* GPG10 input SD/MMC write protect switch
* GPG11 N30 input -- unknown function
* N35 output 0=GPS antenna powered, 1=not powered
* PiN output -- unknown function
* GPG12-15 touch screen functions
*
* The pullups differ between the models, so enable all
* pullups that are enabled on any of the models.
*/
if (machine_is_n30())
__raw_writel(0xff0a956a, S3C2410_GPGCON);
if (machine_is_n35())
__raw_writel(0xff4aa92a, S3C2410_GPGCON);
__raw_writel(0x0000e800, S3C2410_GPGDAT);
__raw_writel(0x0000f86f, S3C2410_GPGUP);
/* GPH0/1/2/3 RS232 serial port
* GPH4/5 IrDA serial port
* GPH6/7 N30 BlueTooth serial port
* N35/PiN GPS receiver
* GPH8 input -- unknown function
* GPH9 CLKOUT0 HCLK -- unknown use
* GPH10 CLKOUT1 FCLK -- unknown use
*
* The pull ups for H6/H7 are enabled on N30 but not on the
* N35/PiN. I suppose is useful for a budget model of the N30
* with no bluetooh. It doesn't hurt to have the pull ups
* enabled on the N35, so leave them enabled for all models.
*/
__raw_writel(0x0028aaaa, S3C2410_GPHCON);
__raw_writel(0x000005ef, S3C2410_GPHDAT);
__raw_writel(0x0000063f, S3C2410_GPHUP);
}
static void __init n30_map_io(void)
{
s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
n30_hwinit();
s3c24xx_init_clocks(0);
s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
}
/* GPB3 is the line that controls the pull-up for the USB D+ line */
static void __init n30_init(void)
{
WARN_ON(gpio_request(S3C2410_GPG(4), "mmc power"));
s3c24xx_fb_set_platdata(&n30_fb_info);
s3c24xx_udc_set_platdata(&n30_udc_cfg);
s3c24xx_mci_set_platdata(&n30_mci_cfg);
s3c_i2c0_set_platdata(&n30_i2ccfg);
/* Turn off suspend on both USB ports, and switch the
* selectable USB port to USB device mode. */
s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
S3C2410_MISCCR_USBSUSPND0 |
S3C2410_MISCCR_USBSUSPND1, 0x0);
if (machine_is_n30()) {
/* Turn off suspend on both USB ports, and switch the
* selectable USB port to USB device mode. */
s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
S3C2410_MISCCR_USBSUSPND0 |
S3C2410_MISCCR_USBSUSPND1, 0x0);
platform_add_devices(n30_devices, ARRAY_SIZE(n30_devices));
}
if (machine_is_n35()) {
/* Turn off suspend and switch the selectable USB port
* to USB device mode. Turn on suspend for the host
* port since it is not connected on the N35.
*
* Actually, the host port is available at some pads
* on the back of the device, so it would actually be
* possible to add a USB device inside the N35 if you
* are willing to do some hardware modifications. */
s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
S3C2410_MISCCR_USBSUSPND0 |
S3C2410_MISCCR_USBSUSPND1,
S3C2410_MISCCR_USBSUSPND0);
platform_add_devices(n35_devices, ARRAY_SIZE(n35_devices));
}
}
MACHINE_START(N30, "Acer-N30")
/* Maintainer: Christer Weinigel <christer@weinigel.se>,
Ben Dooks <ben-linux@fluff.org>
*/
.atag_offset = 0x100,
.init_time = samsung_timer_init,
.init_machine = n30_init,
.init_irq = s3c2410_init_irq,
.map_io = n30_map_io,
.restart = s3c2410_restart,
MACHINE_END
MACHINE_START(N35, "Acer-N35")
/* Maintainer: Christer Weinigel <christer@weinigel.se>
*/
.atag_offset = 0x100,
.init_time = samsung_timer_init,
.init_machine = n30_init,
.init_irq = s3c2410_init_irq,
.map_io = n30_map_io,
.restart = s3c2410_restart,
MACHINE_END