gplugd.c

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/*
 *  linux/arch/arm/mach-mmp/gplugd.c
 *
 *  Support for the Marvell PXA168-based GuruPlug Display (gplugD) Platform.
 *
 *  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
 *  publishhed by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/gpio.h>

#include <asm/mach/arch.h>
#include <asm/mach-types.h>

#include <mach/irqs.h>
#include <mach/pxa168.h>
#include <mach/mfp-pxa168.h>

#include "common.h"

static unsigned long gplugd_pin_config[] __initdata = {
    /* UART3 */
    GPIO8_UART3_TXD,
    GPIO9_UART3_RXD,
    GPIO1O_UART3_CTS,
    GPIO11_UART3_RTS,

    /* USB OTG PEN */
    GPIO18_GPIO,

    /* MMC2 */
    GPIO28_MMC2_CMD,
    GPIO29_MMC2_CLK,
    GPIO30_MMC2_DAT0,
    GPIO31_MMC2_DAT1,
    GPIO32_MMC2_DAT2,
    GPIO33_MMC2_DAT3,

    /* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
    GPIO35_GPIO,
    GPIO36_GPIO, /* CEC Interrupt */

    /* MMC1 */
    GPIO43_MMC1_CLK,
    GPIO49_MMC1_CMD,
    GPIO41_MMC1_DAT0,
    GPIO40_MMC1_DAT1,
    GPIO52_MMC1_DAT2,
    GPIO51_MMC1_DAT3,
    GPIO53_MMC1_CD,

    /* LCD */
    GPIO56_LCD_FCLK_RD,
    GPIO57_LCD_LCLK_A0,
    GPIO58_LCD_PCLK_WR,
    GPIO59_LCD_DENA_BIAS,
    GPIO60_LCD_DD0,
    GPIO61_LCD_DD1,
    GPIO62_LCD_DD2,
    GPIO63_LCD_DD3,
    GPIO64_LCD_DD4,
    GPIO65_LCD_DD5,
    GPIO66_LCD_DD6,
    GPIO67_LCD_DD7,
    GPIO68_LCD_DD8,
    GPIO69_LCD_DD9,
    GPIO70_LCD_DD10,
    GPIO71_LCD_DD11,
    GPIO72_LCD_DD12,
    GPIO73_LCD_DD13,
    GPIO74_LCD_DD14,
    GPIO75_LCD_DD15,
    GPIO76_LCD_DD16,
    GPIO77_LCD_DD17,
    GPIO78_LCD_DD18,
    GPIO79_LCD_DD19,
    GPIO80_LCD_DD20,
    GPIO81_LCD_DD21,
    GPIO82_LCD_DD22,
    GPIO83_LCD_DD23,

    /* GPIO */
    GPIO84_GPIO,
    GPIO85_GPIO,

    /* Fast-Ethernet*/
    GPIO86_TX_CLK,
    GPIO87_TX_EN,
    GPIO88_TX_DQ3,
    GPIO89_TX_DQ2,
    GPIO90_TX_DQ1,
    GPIO91_TX_DQ0,
    GPIO92_MII_CRS,
    GPIO93_MII_COL,
    GPIO94_RX_CLK,
    GPIO95_RX_ER,
    GPIO96_RX_DQ3,
    GPIO97_RX_DQ2,
    GPIO98_RX_DQ1,
    GPIO99_RX_DQ0,
    GPIO100_MII_MDC,
    GPIO101_MII_MDIO,
    GPIO103_RX_DV,
    GPIO104_GPIO,     /* Reset PHY */

    /* RTC interrupt */
    GPIO102_GPIO,

    /* I2C */
    GPIO105_CI2C_SDA,
    GPIO106_CI2C_SCL,

    /* SPI NOR Flash on SSP2 */
    GPIO107_SSP2_RXD,
    GPIO108_SSP2_TXD,
    GPIO110_GPIO,     /* SPI_CSn */
    GPIO111_SSP2_CLK,

    /* Select JTAG */
    GPIO109_GPIO,

    /* I2S */
    GPIO114_I2S_FRM,
    GPIO115_I2S_BCLK,
    GPIO116_I2S_TXD
};

static struct i2c_board_info gplugd_i2c_board_info[] = {
    {
        .type = "isl1208",
        .addr = 0x6F,
    }
};

/* Bring PHY out of reset by setting GPIO 104 */
static int gplugd_eth_init(void)
{
    if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
        printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
                "PHY out of reset\n");
        return -EIO;
    }

    gpio_direction_output(104, 1);
    gpio_free(104);
    return 0;
}

struct pxa168_eth_platform_data gplugd_eth_platform_data = {
    .port_number = 0,
    .phy_addr    = 0,
    .speed       = 0, /* Autonagotiation */
    .init        = gplugd_eth_init,
};

static void __init select_disp_freq(void)
{
    /* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
    if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
        printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
                "frequency\n");
    } else {
        gpio_direction_output(35, 1);
        gpio_free(35);
    }

    if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
        printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
                "frequency\n");
    } else {
        gpio_direction_output(85, 0);
        gpio_free(85);
    }
}

static void __init gplugd_init(void)
{
    mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));

    select_disp_freq();

    /* on-chip devices */
    pxa168_add_uart(3);
    pxa168_add_ssp(1);
    pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
    platform_device_register(&pxa168_device_gpio);

    pxa168_add_eth(&gplugd_eth_platform_data);
}

MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
    .map_io     = mmp_map_io,
    .nr_irqs    = MMP_NR_IRQS,
    .init_irq       = pxa168_init_irq,
    .timer          = &pxa168_timer,
    .init_machine   = gplugd_init,
    .restart    = pxa168_restart,
MACHINE_END