mach-kzm_arm11_01.c

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/*
 * KZM-ARM11-01 support
 *  Copyright (C) 2009  Yoichi Yuasa <[email protected]>
 *
 * based on code for MX31ADS,
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *  Copyright (C) 2002 Shane Nay ([email protected])
 *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/smsc911x.h>
#include <linux/types.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>

#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/memory.h>
#include <asm/setup.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>

#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx3.h>

#include "devices-imx31.h"

#define KZM_ARM11_IO_ADDRESS(x) (IOMEM(                 \
    IMX_IO_P2V_MODULE(x, MX31_CS4) ?:               \
    IMX_IO_P2V_MODULE(x, MX31_CS5)) ?:              \
    MX31_IO_ADDRESS(x))

/*
 *  KZM-ARM11-01 Board Control Registers on FPGA
 */
#define KZM_ARM11_CTL1      (MX31_CS4_BASE_ADDR + 0x1000)
#define KZM_ARM11_CTL2      (MX31_CS4_BASE_ADDR + 0x1001)
#define KZM_ARM11_RSW1      (MX31_CS4_BASE_ADDR + 0x1002)
#define KZM_ARM11_BACK_LIGHT    (MX31_CS4_BASE_ADDR + 0x1004)
#define KZM_ARM11_FPGA_REV  (MX31_CS4_BASE_ADDR + 0x1008)
#define KZM_ARM11_7SEG_LED  (MX31_CS4_BASE_ADDR + 0x1010)
#define KZM_ARM11_LEDS      (MX31_CS4_BASE_ADDR + 0x1020)
#define KZM_ARM11_DIPSW2    (MX31_CS4_BASE_ADDR + 0x1003)

/*
 * External UART for touch panel on FPGA
 */
#define KZM_ARM11_16550     (MX31_CS4_BASE_ADDR + 0x1050)

#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
/*
 * KZM-ARM11-01 has an external UART on FPGA
 */
static struct plat_serial8250_port serial_platform_data[] = {
    {
        .membase    = KZM_ARM11_IO_ADDRESS(KZM_ARM11_16550),
        .mapbase    = KZM_ARM11_16550,
        /* irq number is run-time assigned */
        .irqflags   = IRQ_TYPE_EDGE_RISING,
        .uartclk    = 14745600,
        .regshift   = 0,
        .iotype     = UPIO_MEM,
        .flags      = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
                  UPF_BUGGY_UART,
    },
    {},
};

static struct resource serial8250_resources[] = {
    {
        .start  = KZM_ARM11_16550,
        .end    = KZM_ARM11_16550 + 0x10,
        .flags  = IORESOURCE_MEM,
    },
    {
        /* irq number is run-time assigned */
        .flags  = IORESOURCE_IRQ,
    },
};

static struct platform_device serial_device = {
    .name       = "serial8250",
    .id     = PLAT8250_DEV_PLATFORM,
    .dev        = {
                .platform_data = serial_platform_data,
              },
    .num_resources  = ARRAY_SIZE(serial8250_resources),
    .resource   = serial8250_resources,
};

static int __init kzm_init_ext_uart(void)
{
    u8 tmp;

    /*
     * GPIO 1-1: external UART interrupt line
     */
    mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO));
    gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "ext-uart-int");
    gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));

    /*
     * Unmask UART interrupt
     */
    tmp = __raw_readb(KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));
    tmp |= 0x2;
    __raw_writeb(tmp, KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));

    serial_platform_data[0].irq =
            gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
    serial8250_resources[1].start =
            gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
    serial8250_resources[1].end =
            gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));

    return platform_device_register(&serial_device);
}
#else
static inline int kzm_init_ext_uart(void)
{
    return 0;
}
#endif

/*
 * SMSC LAN9118
 */
#if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)
static struct smsc911x_platform_config kzm_smsc9118_config = {
    .phy_interface  = PHY_INTERFACE_MODE_MII,
    .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
    .irq_type   = SMSC911X_IRQ_TYPE_PUSH_PULL,
    .flags      = SMSC911X_USE_32BIT | SMSC911X_SAVE_MAC_ADDRESS,
};

static struct resource kzm_smsc9118_resources[] = {
    {
        .start  = MX31_CS5_BASE_ADDR,
        .end    = MX31_CS5_BASE_ADDR + SZ_128K - 1,
        .flags  = IORESOURCE_MEM,
    },
    {
        /* irq number is run-time assigned */
        .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
    },
};

static struct platform_device kzm_smsc9118_device = {
    .name       = "smsc911x",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(kzm_smsc9118_resources),
    .resource   = kzm_smsc9118_resources,
    .dev        = {
                .platform_data = &kzm_smsc9118_config,
              },
};

static struct regulator_consumer_supply dummy_supplies[] = {
    REGULATOR_SUPPLY("vdd33a", "smsc911x"),
    REGULATOR_SUPPLY("vddvario", "smsc911x"),
};

static int __init kzm_init_smsc9118(void)
{
    /*
     * GPIO 1-2: SMSC9118 interrupt line
     */
    mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_2, IOMUX_CONFIG_GPIO));
    gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2), "smsc9118-int");
    gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));

    regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));

    kzm_smsc9118_resources[1].start =
            gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
    kzm_smsc9118_resources[1].end =
            gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));

    return platform_device_register(&kzm_smsc9118_device);
}
#else
static inline int kzm_init_smsc9118(void)
{
    return 0;
}
#endif

#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
static const struct imxuart_platform_data uart_pdata __initconst = {
    .flags = IMXUART_HAVE_RTSCTS,
};

static void __init kzm_init_imx_uart(void)
{
    imx31_add_imx_uart0(&uart_pdata);
    imx31_add_imx_uart1(&uart_pdata);
}
#else
static inline void kzm_init_imx_uart(void)
{
}
#endif

static int kzm_pins[] __initdata = {
    MX31_PIN_CTS1__CTS1,
    MX31_PIN_RTS1__RTS1,
    MX31_PIN_TXD1__TXD1,
    MX31_PIN_RXD1__RXD1,
    MX31_PIN_DCD_DCE1__DCD_DCE1,
    MX31_PIN_RI_DCE1__RI_DCE1,
    MX31_PIN_DSR_DCE1__DSR_DCE1,
    MX31_PIN_DTR_DCE1__DTR_DCE1,
    MX31_PIN_CTS2__CTS2,
    MX31_PIN_RTS2__RTS2,
    MX31_PIN_TXD2__TXD2,
    MX31_PIN_RXD2__RXD2,
    MX31_PIN_DCD_DTE1__DCD_DTE2,
    MX31_PIN_RI_DTE1__RI_DTE2,
    MX31_PIN_DSR_DTE1__DSR_DTE2,
    MX31_PIN_DTR_DTE1__DTR_DTE2,
};

/*
 * Board specific initialization.
 */
static void __init kzm_board_init(void)
{
    imx31_soc_init();

    mxc_iomux_setup_multiple_pins(kzm_pins,
                      ARRAY_SIZE(kzm_pins), "kzm");
    kzm_init_ext_uart();
    kzm_init_smsc9118();
    kzm_init_imx_uart();

    pr_info("Clock input source is 26MHz\n");
}

/*
 * This structure defines static mappings for the kzm-arm11-01 board.
 */
static struct map_desc kzm_io_desc[] __initdata = {
    {
        .virtual    = (unsigned long)MX31_CS4_BASE_ADDR_VIRT,
        .pfn        = __phys_to_pfn(MX31_CS4_BASE_ADDR),
        .length     = MX31_CS4_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = (unsigned long)MX31_CS5_BASE_ADDR_VIRT,
        .pfn        = __phys_to_pfn(MX31_CS5_BASE_ADDR),
        .length     = MX31_CS5_SIZE,
        .type       = MT_DEVICE
    },
};

/*
 * Set up static virtual mappings.
 */
static void __init kzm_map_io(void)
{
    mx31_map_io();
    iotable_init(kzm_io_desc, ARRAY_SIZE(kzm_io_desc));
}

static void __init kzm_timer_init(void)
{
    mx31_clocks_init(26000000);
}

static struct sys_timer kzm_timer = {
    .init = kzm_timer_init,
};

MACHINE_START(KZM_ARM11_01, "Kyoto Microcomputer Co., Ltd. KZM-ARM11-01")
    .atag_offset = 0x100,
    .map_io = kzm_map_io,
    .init_early = imx31_init_early,
    .init_irq = mx31_init_irq,
    .handle_irq = imx31_handle_irq,
    .timer = &kzm_timer,
    .init_machine = kzm_board_init,
    .restart    = mxc_restart,
MACHINE_END