zylonite_pxa300.c

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/*
 * linux/arch/arm/mach-pxa/zylonite_pxa300.c
 *
 * PXA300/PXA310 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/i2c.h>
#include <linux/i2c/pxa-i2c.h>
#include <linux/i2c/pca953x.h>
#include <linux/gpio.h>

#include <mach/pxa300.h>
#include <mach/zylonite.h>

#include "generic.h"

/* PXA300/PXA310 common configurations */
static mfp_cfg_t common_mfp_cfg[] __initdata = {
    /* LCD */
    GPIO54_LCD_LDD_0,
    GPIO55_LCD_LDD_1,
    GPIO56_LCD_LDD_2,
    GPIO57_LCD_LDD_3,
    GPIO58_LCD_LDD_4,
    GPIO59_LCD_LDD_5,
    GPIO60_LCD_LDD_6,
    GPIO61_LCD_LDD_7,
    GPIO62_LCD_LDD_8,
    GPIO63_LCD_LDD_9,
    GPIO64_LCD_LDD_10,
    GPIO65_LCD_LDD_11,
    GPIO66_LCD_LDD_12,
    GPIO67_LCD_LDD_13,
    GPIO68_LCD_LDD_14,
    GPIO69_LCD_LDD_15,
    GPIO70_LCD_LDD_16,
    GPIO71_LCD_LDD_17,
    GPIO72_LCD_FCLK,
    GPIO73_LCD_LCLK,
    GPIO74_LCD_PCLK,
    GPIO75_LCD_BIAS,
    GPIO76_LCD_VSYNC,
    GPIO127_LCD_CS_N,
    GPIO20_PWM3_OUT,    /* backlight */

    /* BTUART */
    GPIO111_UART2_RTS,
    GPIO112_UART2_RXD | MFP_LPM_EDGE_FALL,
    GPIO113_UART2_TXD,
    GPIO114_UART2_CTS | MFP_LPM_EDGE_BOTH,

    /* STUART */
    GPIO109_UART3_TXD,
    GPIO110_UART3_RXD | MFP_LPM_EDGE_FALL,

    /* AC97 */
    GPIO23_AC97_nACRESET,
    GPIO24_AC97_SYSCLK,
    GPIO29_AC97_BITCLK,
    GPIO25_AC97_SDATA_IN_0,
    GPIO27_AC97_SDATA_OUT,
    GPIO28_AC97_SYNC,
    GPIO17_GPIO,    /* SDATA_IN_1 but unused - configure to GPIO */

    /* SSP3 */
    GPIO91_SSP3_SCLK,
    GPIO92_SSP3_FRM,
    GPIO93_SSP3_TXD,
    GPIO94_SSP3_RXD,

    /* WM9713 IRQ */
    GPIO26_GPIO,

    /* Keypad */
    GPIO107_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
    GPIO108_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
    GPIO115_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
    GPIO116_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
    GPIO117_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
    GPIO118_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
    GPIO119_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
    GPIO120_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
    GPIO2_2_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
    GPIO3_2_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,
    GPIO4_2_KP_MKOUT_5,
    GPIO5_2_KP_MKOUT_6,
    GPIO6_2_KP_MKOUT_7,

    /* MMC1 */
    GPIO3_MMC1_DAT0,
    GPIO4_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
    GPIO5_MMC1_DAT2,
    GPIO6_MMC1_DAT3,
    GPIO7_MMC1_CLK,
    GPIO8_MMC1_CMD, /* CMD0 for slot 0 */
    GPIO15_GPIO,    /* CMD1 default as GPIO for slot 0 */

    /* MMC2 */
    GPIO9_MMC2_DAT0,
    GPIO10_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
    GPIO11_MMC2_DAT2,
    GPIO12_MMC2_DAT3,
    GPIO13_MMC2_CLK,
    GPIO14_MMC2_CMD,

    /* USB Host */
    GPIO0_2_USBH_PEN,
    GPIO1_2_USBH_PWR,

    /* Standard I2C */
    GPIO21_I2C_SCL,
    GPIO22_I2C_SDA,

    /* GPIO */
    GPIO18_GPIO | MFP_PULL_HIGH,    /* GPIO Expander #0 INT_N */
    GPIO19_GPIO | MFP_PULL_HIGH,    /* GPIO Expander #1 INT_N */
};

static mfp_cfg_t pxa300_mfp_cfg[] __initdata = {
    /* FFUART */
    GPIO30_UART1_RXD | MFP_LPM_EDGE_FALL,
    GPIO31_UART1_TXD,
    GPIO32_UART1_CTS,
    GPIO37_UART1_RTS,
    GPIO33_UART1_DCD,
    GPIO34_UART1_DSR | MFP_LPM_EDGE_FALL,
    GPIO35_UART1_RI,
    GPIO36_UART1_DTR,

    /* Ethernet */
    GPIO2_nCS3,
    GPIO99_GPIO,
};

static mfp_cfg_t pxa310_mfp_cfg[] __initdata = {
    /* FFUART */
    GPIO99_UART1_RXD | MFP_LPM_EDGE_FALL,
    GPIO100_UART1_TXD,
    GPIO101_UART1_CTS,
    GPIO106_UART1_RTS,

    /* Ethernet */
    GPIO2_nCS3,
    GPIO102_GPIO,

    /* MMC3 */
    GPIO7_2_MMC3_DAT0,
    GPIO8_2_MMC3_DAT1 | MFP_LPM_EDGE_BOTH,
    GPIO9_2_MMC3_DAT2,
    GPIO10_2_MMC3_DAT3,
    GPIO103_MMC3_CLK,
    GPIO105_MMC3_CMD,
};

#define NUM_LCD_DETECT_PINS 7

static int lcd_detect_pins[] __initdata = {
    MFP_PIN_GPIO71, /* LCD_LDD_17 - ORIENT */
    MFP_PIN_GPIO70, /* LCD_LDD_16 - LCDID[5] */
    MFP_PIN_GPIO75, /* LCD_BIAS   - LCDID[4] */
    MFP_PIN_GPIO73, /* LCD_LCLK   - LCDID[3] */
    MFP_PIN_GPIO72, /* LCD_FCLK   - LCDID[2] */
    MFP_PIN_GPIO127,/* LCD_CS_N   - LCDID[1] */
    MFP_PIN_GPIO76, /* LCD_VSYNC  - LCDID[0] */
};

static void __init zylonite_detect_lcd_panel(void)
{
    unsigned long mfpr_save[NUM_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 < NUM_LCD_DETECT_PINS; i++) {
        mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
        pxa3xx_mfp_write(lcd_detect_pins[i], 0x8440);
    }

    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 < NUM_LCD_DETECT_PINS; i++)
        pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
}

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static struct pca953x_platform_data gpio_exp[] = {
    [0] = {
        .gpio_base  = 128,
    },
    [1] = {
        .gpio_base  = 144,
    },
};

static struct i2c_board_info zylonite_i2c_board_info[] = {
    {
        .type       = "pca9539",
        .addr       = 0x74,
        .platform_data  = &gpio_exp[0],
        .irq        = PXA_GPIO_TO_IRQ(18),
    }, {
        .type       = "pca9539",
        .addr       = 0x75,
        .platform_data  = &gpio_exp[1],
        .irq        = PXA_GPIO_TO_IRQ(19),
    },
};

static void __init zylonite_init_i2c(void)
{
    pxa_set_i2c_info(NULL);
    i2c_register_board_info(0, ARRAY_AND_SIZE(zylonite_i2c_board_info));
}
#else
static inline void zylonite_init_i2c(void) {}
#endif

void __init zylonite_pxa300_init(void)
{
    if (cpu_is_pxa300() || cpu_is_pxa310()) {
        /* initialize MFP */
        pxa3xx_mfp_config(ARRAY_AND_SIZE(common_mfp_cfg));

        /* detect LCD panel */
        zylonite_detect_lcd_panel();

        /* WM9713 IRQ */
        wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO26);

        zylonite_init_i2c();
    }

    if (cpu_is_pxa300()) {
        pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa300_mfp_cfg));
        gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO99);
    }

    if (cpu_is_pxa310()) {
        pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa310_mfp_cfg));
        gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO102);
    }

    /* GPIOs for Debug LEDs */
    gpio_debug_led1 = EXT_GPIO(25);
    gpio_debug_led2 = EXT_GPIO(26);
}