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pcm027.c

/*
 *  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: armlinux@phytec.de
 *
 *  based on Intel Mainstone Board
 *
 *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
 *
 *  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/leds.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/arch/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/pxa2xx-gpio.h>
#include <asm/arch/pxa2xx-regs.h>
#include <asm/arch/pxa2xx_spi.h>
#include <asm/arch/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
 */

/*
 * 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,
};

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;

      platform_add_devices(devices, ARRAY_SIZE(devices));

      /* LEDs (on demand only) */
#ifdef CONFIG_LEDS_GPIO
      pxa_gpio_mode(PCM027_LED_CPU | GPIO_OUT);
      pxa_gpio_mode(PCM027_LED_HEARD_BEAT | GPIO_OUT);
#endif /* CONFIG_LEDS_GPIO */

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

static void __init pcm027_map_io(void)
{
      pxa_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 */
      .boot_params      = 0xa0000100,
      .phys_io    = 0x40000000,
      .io_pg_offst      = (io_p2v(0x40000000) >> 18) & 0xfffc,
      .map_io           = pcm027_map_io,
      .init_irq   = pxa27x_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = pcm027_init,
MACHINE_END

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