zylonite_pxa320.c

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/*
 * linux/arch/arm/mach-pxa/zylonite_pxa320.c
 *
 * PXA320 specific support code for the
 * PXA3xx Development Platform (aka Zylonite)
 *
 * Copyright (C) 2007 Marvell Internation Ltd.
 * 2007-08-21: eric miao <[email protected]>
 *             initial version
 *
 * 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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio.h>

#include <mach/pxa320.h>
#include <mach/zylonite.h>

#include "generic.h"

static mfp_cfg_t mfp_cfg[] __initdata = {
    /* LCD */
    GPIO6_2_LCD_LDD_0,
    GPIO7_2_LCD_LDD_1,
    GPIO8_2_LCD_LDD_2,
    GPIO9_2_LCD_LDD_3,
    GPIO10_2_LCD_LDD_4,
    GPIO11_2_LCD_LDD_5,
    GPIO12_2_LCD_LDD_6,
    GPIO13_2_LCD_LDD_7,
    GPIO63_LCD_LDD_8,
    GPIO64_LCD_LDD_9,
    GPIO65_LCD_LDD_10,
    GPIO66_LCD_LDD_11,
    GPIO67_LCD_LDD_12,
    GPIO68_LCD_LDD_13,
    GPIO69_LCD_LDD_14,
    GPIO70_LCD_LDD_15,
    GPIO71_LCD_LDD_16,
    GPIO72_LCD_LDD_17,
    GPIO73_LCD_CS_N,
    GPIO74_LCD_VSYNC,
    GPIO14_2_LCD_FCLK,
    GPIO15_2_LCD_LCLK,
    GPIO16_2_LCD_PCLK,
    GPIO17_2_LCD_BIAS,
    GPIO14_PWM3_OUT,    /* backlight */

    /* FFUART */
    GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
    GPIO42_UART1_TXD,
    GPIO43_UART1_CTS,
    GPIO44_UART1_DCD,
    GPIO45_UART1_DSR | MFP_LPM_EDGE_FALL,
    GPIO46_UART1_RI,
    GPIO47_UART1_DTR,
    GPIO48_UART1_RTS,

    /* AC97 */
    GPIO34_AC97_SYSCLK,
    GPIO35_AC97_SDATA_IN_0,
    GPIO37_AC97_SDATA_OUT,
    GPIO38_AC97_SYNC,
    GPIO39_AC97_BITCLK,
    GPIO40_AC97_nACRESET,
    GPIO36_GPIO,    /* SDATA_IN_1 but unused - configure to GPIO */

    /* SSP3 */
    GPIO89_SSP3_SCLK,
    GPIO90_SSP3_FRM,
    GPIO91_SSP3_TXD,
    GPIO92_SSP3_RXD,

    /* WM9713 IRQ */
    GPIO15_GPIO,

    /* I2C */
    GPIO32_I2C_SCL,
    GPIO33_I2C_SDA,

    /* Keypad */
    GPIO105_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
    GPIO106_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
    GPIO113_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
    GPIO114_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
    GPIO115_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
    GPIO116_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
    GPIO117_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
    GPIO118_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
    GPIO119_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
    GPIO120_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
    GPIO121_KP_MKOUT_0,
    GPIO122_KP_MKOUT_1,
    GPIO123_KP_MKOUT_2,
    GPIO124_KP_MKOUT_3,
    GPIO125_KP_MKOUT_4,
    GPIO126_KP_MKOUT_5,
    GPIO127_KP_MKOUT_6,
    GPIO5_2_KP_MKOUT_7,

    /* Ethernet */
    GPIO4_nCS3,
    GPIO90_GPIO,

    /* MMC1 */
    GPIO18_MMC1_DAT0,
    GPIO19_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
    GPIO20_MMC1_DAT2,
    GPIO21_MMC1_DAT3,
    GPIO22_MMC1_CLK,
    GPIO23_MMC1_CMD,/* CMD0 for slot 0 */
    GPIO31_GPIO,    /* CMD1 default as GPIO for slot 0 */

    /* MMC2 */
    GPIO24_MMC2_DAT0,
    GPIO25_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
    GPIO26_MMC2_DAT2,
    GPIO27_MMC2_DAT3,
    GPIO28_MMC2_CLK,
    GPIO29_MMC2_CMD,

    /* USB Host */
    GPIO2_2_USBH_PEN,
    GPIO3_2_USBH_PWR,

    /* Debug LEDs */
    GPIO1_2_GPIO | MFP_LPM_DRIVE_HIGH,
    GPIO4_2_GPIO | MFP_LPM_DRIVE_HIGH,
};

#define NUM_LCD_DETECT_PINS 7

static int lcd_detect_pins[] __initdata = {
    MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
    MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
    MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
    MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
    MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
    MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
    MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
    /*
     * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
     * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
     */
    MFP_PIN_GPIO14,
    MFP_PIN_GPIO15,
    MFP_PIN_GPIO17,
};

static int lcd_detect_mfpr[] __initdata = {
    /* AF0, DS 1X, Pull Neither, Edge Clear */
    0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
    0xc442, /* Backlight, Pull-Up, AF2 */
    0x8445, /* AF5 */
    0x8445, /* AF5 */
};

static void __init zylonite_detect_lcd_panel(void)
{
    unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
    int i, gpio, id = 0;

    /* save the original MFP settings of these pins and configure them
     * as GPIO Input, DS01X, Pull Neither, Edge Clear
     */
    for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
        mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
        pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
    }

    for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
        id = id << 1;
        gpio = mfp_to_gpio(lcd_detect_pins[i]);
        gpio_request(gpio, "LCD_ID_PINS");
        gpio_direction_input(gpio);

        if (gpio_get_value(gpio))
            id = id | 0x1;
        gpio_free(gpio);
    }

    /* lcd id, flush out bit 1 */
    lcd_id = id & 0x3d;

    /* lcd orientation, portrait or landscape */
    lcd_orientation = (id >> 6) & 0x1;

    /* restore the original MFP settings */
    for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
        pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
}

void __init zylonite_pxa320_init(void)
{
    if (cpu_is_pxa320()) {
        /* initialize MFP */
        pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));

        /* detect LCD panel */
        zylonite_detect_lcd_panel();

        /* GPIO pin assignment */
        gpio_eth_irq    = mfp_to_gpio(MFP_PIN_GPIO9);
        gpio_debug_led1 = mfp_to_gpio(MFP_PIN_GPIO1_2);
        gpio_debug_led2 = mfp_to_gpio(MFP_PIN_GPIO4_2);

        /* WM9713 IRQ */
        wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO15);
    }
}