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mach-kzm_arm11_01.c

/*
 * KZM-ARM11-01 support
 *  Copyright (C) 2009  Yoichi Yuasa <yuasa@linux-mips.org>
 *
 * based on code for MX31ADS,
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
 *  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 <asm/irq.h>
#include <asm/mach-types.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/clock.h>
#include <mach/common.h>
#include <mach/iomux-mx3.h>
#include <mach/memory.h>

#include "devices-imx31.h"
#include "devices.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        = IOMUX_TO_IRQ(MX31_PIN_GPIO1_1),
            .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,
      },
      {
            .start      = IOMUX_TO_IRQ(MX31_PIN_GPIO1_1),
            .end  = IOMUX_TO_IRQ(MX31_PIN_GPIO1_1),
            .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));

      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,
      },
      {
            .start      = IOMUX_TO_IRQ(MX31_PIN_GPIO1_2),
            .end  = IOMUX_TO_IRQ(MX31_PIN_GPIO1_2),
            .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 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));

      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)
{
      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    = MX31_CS4_BASE_ADDR_VIRT,
            .pfn        = __phys_to_pfn(MX31_CS4_BASE_ADDR),
            .length           = MX31_CS4_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = 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,
};

/*
 * The following uses standard kernel macros define in arch.h in order to
 * initialize __mach_desc_KZM_ARM11_01 data structure.
 */
MACHINE_START(KZM_ARM11_01, "Kyoto Microcomputer Co., Ltd. KZM-ARM11-01")
      .boot_params    = MX3x_PHYS_OFFSET + 0x100,
      .map_io         = kzm_map_io,
      .init_irq       = mx31_init_irq,
      .init_machine   = kzm_board_init,
      .timer          = &kzm_timer,
MACHINE_END

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