pcm027.c

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/*
 *  linux/arch/arm/mach-pxa/pcm027.c
 *  Support for the Phytec phyCORE-PXA270 CPU card (aka PCM-027).
 *
 *  Refer
 *   http://www.phytec.com/products/sbc/ARM-XScale/phyCORE-XScale-PXA270.html
 *  for additional hardware info
 *
 *  Author: Juergen Kilb
 *  Created:    April 05, 2005
 *  Copyright:  Phytec Messtechnik GmbH
 *  e-Mail: [email protected]
 *
 *  based on Intel Mainstone Board
 *
 *  Copyright 2007 Juergen Beisert @ Pengutronix ([email protected])
 *
 *  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/irq.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/spi/spi.h>
#include <linux/spi/max7301.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/leds.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/pxa27x.h>
#include <mach/pcm027.h>
#include "generic.h"

/*
 * ABSTRACT:
 *
 * The PXA270 processor comes with a bunch of hardware on its silicon.
 * Not all of this hardware can be used at the same time and not all
 * is routed to module's connectors. Also it depends on the baseboard, what
 * kind of hardware can be used in which way.
 * -> So this file supports the main devices on the CPU card only!
 * Refer pcm990-baseboard.c how to extend this features to get a full
 * blown system with many common interfaces.
 *
 * The PCM-027 supports the following interfaces through its connectors and
 * will be used in pcm990-baseboard.c:
 *
 * - LCD support
 * - MMC support
 * - IDE/CF card
 * - FFUART
 * - BTUART
 * - IRUART
 * - AC97
 * - SSP
 * - SSP3
 *
 * Claimed GPIOs:
 * GPIO0 -> IRQ input from RTC
 * GPIO2 -> SYS_ENA*)
 * GPIO3 -> PWR_SCL
 * GPIO4 -> PWR_SDA
 * GPIO5 -> PowerCap0*)
 * GPIO6 -> PowerCap1*)
 * GPIO7 -> PowerCap2*)
 * GPIO8 -> PowerCap3*)
 * GPIO15 -> /CS1
 * GPIO20 -> /CS2
 * GPIO21 -> /CS3
 * GPIO33 -> /CS5 network controller select
 * GPIO52 -> IRQ from network controller
 * GPIO78 -> /CS2
 * GPIO80 -> /CS4
 * GPIO90 -> LED0
 * GPIO91 -> LED1
 * GPIO114 -> IRQ from CAN controller
 * GPIO117 -> SCL
 * GPIO118 -> SDA
 *
 * *) CPU internal use only
 */

static unsigned long pcm027_pin_config[] __initdata = {
    /* Chip Selects */
    GPIO20_nSDCS_2,
    GPIO21_nSDCS_3,
    GPIO15_nCS_1,
    GPIO78_nCS_2,
    GPIO80_nCS_4,
    GPIO33_nCS_5,   /* Ethernet */

    /* I2C */
    GPIO117_I2C_SCL,
    GPIO118_I2C_SDA,

    /* GPIO */
    GPIO52_GPIO,    /* IRQ from network controller */
#ifdef CONFIG_LEDS_GPIO
    GPIO90_GPIO,    /* PCM027_LED_CPU */
    GPIO91_GPIO,    /* PCM027_LED_HEART_BEAT */
#endif
    GPIO114_GPIO,   /* IRQ from CAN controller */
};

/*
 * SMC91x network controller specific stuff
 */
static struct resource smc91x_resources[] = {
    [0] = {
        .start  = PCM027_ETH_PHYS + 0x300,
        .end    = PCM027_ETH_PHYS + PCM027_ETH_SIZE,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = PCM027_ETH_IRQ,
        .end    = PCM027_ETH_IRQ,
        /* note: smc91x's driver doesn't use the trigger bits yet */
        .flags  = IORESOURCE_IRQ | PCM027_ETH_IRQ_EDGE,
    }
};

static struct platform_device smc91x_device = {
    .name       = "smc91x",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(smc91x_resources),
    .resource   = smc91x_resources,
};

/*
 * SPI host and devices
 */
static struct pxa2xx_spi_master pxa_ssp_master_info = {
    .num_chipselect = 1,
};

static struct max7301_platform_data max7301_info = {
    .base = -1,
};

/* bus_num must match id in pxa2xx_set_spi_info() call */
static struct spi_board_info spi_board_info[] __initdata = {
    {
        .modalias   = "max7301",
        .platform_data  = &max7301_info,
        .max_speed_hz   = 13000000,
        .bus_num    = 1,
        .chip_select    = 0,
        .mode       = SPI_MODE_0,
    },
};

/*
 * NOR flash
 */
static struct physmap_flash_data pcm027_flash_data = {
    .width  = 4,
};

static struct resource pcm027_flash_resource = {
    .start          = PCM027_FLASH_PHYS,
    .end            = PCM027_FLASH_PHYS + PCM027_FLASH_SIZE - 1 ,
    .flags          = IORESOURCE_MEM,
};

static struct platform_device pcm027_flash = {
    .name           = "physmap-flash",
    .id             = 0,
    .dev            = {
        .platform_data  = &pcm027_flash_data,
    },
    .resource       = &pcm027_flash_resource,
    .num_resources  = 1,
};

#ifdef CONFIG_LEDS_GPIO

static struct gpio_led pcm027_led[] = {
    {
        .name = "led0:red", /* FIXME */
        .gpio = PCM027_LED_CPU
    },
    {
        .name = "led1:green",   /* FIXME */
        .gpio = PCM027_LED_HEARD_BEAT
    },
};

static struct gpio_led_platform_data pcm027_led_data = {
    .num_leds   = ARRAY_SIZE(pcm027_led),
    .leds       = pcm027_led
};

static struct platform_device pcm027_led_dev = {
    .name       = "leds-gpio",
    .id     = 0,
    .dev        = {
        .platform_data  = &pcm027_led_data,
    },
};

#endif /* CONFIG_LEDS_GPIO */

/*
 * declare the available device resources on this board
 */
static struct platform_device *devices[] __initdata = {
    &smc91x_device,
    &pcm027_flash,
#ifdef CONFIG_LEDS_GPIO
    &pcm027_led_dev
#endif
};

/*
 * pcm027_init - breath some life into the board
 */
static void __init pcm027_init(void)
{
    /* system bus arbiter setting
     * - Core_Park
     * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
     */
    ARB_CNTRL = ARB_CORE_PARK | 0x234;

    pxa2xx_mfp_config(pcm027_pin_config, ARRAY_SIZE(pcm027_pin_config));

    pxa_set_ffuart_info(NULL);
    pxa_set_btuart_info(NULL);
    pxa_set_stuart_info(NULL);

    platform_add_devices(devices, ARRAY_SIZE(devices));

    /* at last call the baseboard to initialize itself */
#ifdef CONFIG_MACH_PCM990_BASEBOARD
    pcm990_baseboard_init();
#endif

    pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
    spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
}

static void __init pcm027_map_io(void)
{
    pxa27x_map_io();

    /* initialize sleep mode regs (wake-up sources, etc) */
    PGSR0 = 0x01308000;
    PGSR1 = 0x00CF0002;
    PGSR2 = 0x0E294000;
    PGSR3 = 0x0000C000;
    PWER  = 0x40000000 | PWER_GPIO0 | PWER_GPIO1;
    PRER  = 0x00000000;
    PFER  = 0x00000003;
}

MACHINE_START(PCM027, "Phytec Messtechnik GmbH phyCORE-PXA270")
    /* Maintainer: Pengutronix */
    .atag_offset    = 0x100,
    .map_io     = pcm027_map_io,
    .nr_irqs    = PCM027_NR_IRQS,
    .init_irq   = pxa27x_init_irq,
    .handle_irq = pxa27x_handle_irq,
    .timer      = &pxa_timer,
    .init_machine   = pcm027_init,
    .restart    = pxa_restart,
MACHINE_END