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mach-n30.c

/* 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/delay.h>
#include <linux/gpio_keys.h>
#include <linux/init.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 <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>

#include <mach/fb.h>
#include <mach/leds-gpio.h>
#include <mach/regs-gpio.h>
#include <mach/regs-lcd.h>

#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>

#include <asm/plat-s3c/iic.h>
#include <plat/regs-serial.h>

#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/s3c2410.h>
#include <asm/plat-s3c24xx/udc.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 void n30_udc_pullup(enum s3c2410_udc_cmd_e cmd)
{
      switch (cmd) {
      case S3C2410_UDC_P_ENABLE :
            s3c2410_gpio_setpin(S3C2410_GPB3, 1);
            break;
      case S3C2410_UDC_P_DISABLE :
            s3c2410_gpio_setpin(S3C2410_GPB3, 0);
            break;
      case S3C2410_UDC_P_RESET :
            break;
      default:
            break;
      }
}

static struct s3c2410_udc_mach_info n30_udc_cfg __initdata = {
      .udc_command            = n30_udc_pullup,
      .vbus_pin         = S3C2410_GPG1,
      .vbus_pin_inverted      = 0,
};

static struct gpio_keys_button n30_buttons[] = {
      {
            .gpio       = S3C2410_GPF0,
            .code       = KEY_POWER,
            .desc       = "Power",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG9,
            .code       = KEY_UP,
            .desc       = "Thumbwheel Up",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG8,
            .code       = KEY_DOWN,
            .desc       = "Thumbwheel Down",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG7,
            .code       = KEY_ENTER,
            .desc       = "Thumbwheel Press",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF7,
            .code       = KEY_HOMEPAGE,
            .desc       = "Home",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF6,
            .code       = KEY_CALENDAR,
            .desc       = "Calendar",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF5,
            .code       = KEY_ADDRESSBOOK,
            .desc       = "Contacts",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF4,
            .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_GPF0,
            .code       = KEY_POWER,
            .desc       = "Power",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG9,
            .code       = KEY_UP,
            .desc       = "Joystick Up",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG8,
            .code       = KEY_DOWN,
            .desc       = "Joystick Down",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG6,
            .code       = KEY_DOWN,
            .desc       = "Joystick Left",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG5,
            .code       = KEY_DOWN,
            .desc       = "Joystick Right",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG7,
            .code       = KEY_ENTER,
            .desc       = "Joystick Press",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF7,
            .code       = KEY_HOMEPAGE,
            .desc       = "Home",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF6,
            .code       = KEY_CALENDAR,
            .desc       = "Calendar",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF5,
            .code       = KEY_ADDRESSBOOK,
            .desc       = "Contacts",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF4,
            .code       = KEY_MAIL,
            .desc       = "Mail",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPF3,
            .code       = SW_RADIO,
            .desc       = "GPS Antenna",
            .active_low = 0,
      },
      {
            .gpio       = S3C2410_GPG2,
            .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_GPG6,
      .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_GPD9,
      .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 n30_warning_led = {
      .name       = "s3c24xx_led",
      .id         = 2,
      .dev        = {
            .platform_data    = &n30_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 struct platform_device *n30_devices[] __initdata = {
      &s3c_device_lcd,
      &s3c_device_wdt,
      &s3c_device_i2c,
      &s3c_device_iis,
      &s3c_device_usb,
      &s3c_device_usbgadget,
      &n30_button_device,
      &n30_blue_led,
      &n30_warning_led,
};

static struct platform_device *n35_devices[] __initdata = {
      &s3c_device_lcd,
      &s3c_device_wdt,
      &s3c_device_i2c,
      &s3c_device_iis,
      &s3c_device_usbgadget,
      &n35_button_device,
};

static struct s3c2410_platform_i2c n30_i2ccfg = {
      .flags            = 0,
      .slave_addr = 0x10,
      .bus_freq   = 10*1000,
      .max_freq   = 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));
}

static void __init n30_init_irq(void)
{
      s3c24xx_init_irq();
}

/* GPB3 is the line that controls the pull-up for the USB D+ line */

static void __init n30_init(void)
{
      s3c24xx_fb_set_platdata(&n30_fb_info);
      s3c_device_i2c.dev.platform_data = &n30_i2ccfg;
      s3c24xx_udc_set_platdata(&n30_udc_cfg);

      /* 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_USBSUSPND1);

            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>
      */
      .phys_io    = S3C2410_PA_UART,
      .io_pg_offst      = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
      .boot_params      = S3C2410_SDRAM_PA + 0x100,
      .timer            = &s3c24xx_timer,
      .init_machine     = n30_init,
      .init_irq   = n30_init_irq,
      .map_io           = n30_map_io,
MACHINE_END

MACHINE_START(N35, "Acer-N35")
      /* Maintainer: Christer Weinigel <christer@weinigel.se>
      */
      .phys_io    = S3C2410_PA_UART,
      .io_pg_offst      = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
      .boot_params      = S3C2410_SDRAM_PA + 0x100,
      .timer            = &s3c24xx_timer,
      .init_machine     = n30_init,
      .init_irq   = n30_init_irq,
      .map_io           = n30_map_io,
MACHINE_END

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