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mach-mx28evk.c

/*
 * Copyright 2010 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/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/clk.h>

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

#include <mach/common.h>
#include <mach/iomux-mx28.h>

#include "devices-mx28.h"
#include "gpio.h"

#define MX28EVK_FEC_PHY_POWER MXS_GPIO_NR(2, 15)
#define MX28EVK_FEC_PHY_RESET MXS_GPIO_NR(4, 13)

static const iomux_cfg_t mx28evk_pads[] __initconst = {
      /* duart */
      MX28_PAD_PWM0__DUART_RX |
            (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
      MX28_PAD_PWM1__DUART_TX |
            (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),

      /* fec0 */
      MX28_PAD_ENET0_MDC__ENET0_MDC |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_MDIO__ENET0_MDIO |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET_CLK__CLKCTRL_ENET |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      /* fec1 */
      MX28_PAD_ENET0_CRS__ENET1_RX_EN |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_RXD2__ENET1_RXD0 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_RXD3__ENET1_RXD1 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_COL__ENET1_TX_EN |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_TXD2__ENET1_TXD0 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      MX28_PAD_ENET0_TXD3__ENET1_TXD1 |
            (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
      /* phy power line */
      MX28_PAD_SSP1_DATA3__GPIO_2_15 |
            (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
      /* phy reset line */
      MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
            (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
};

/* fec */
static void __init mx28evk_fec_reset(void)
{
      int ret;
      struct clk *clk;

      /* Enable fec phy clock */
      clk = clk_get_sys("pll2", NULL);
      if (!IS_ERR(clk))
            clk_enable(clk);

      /* Power up fec phy */
      ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
      if (ret) {
            pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
            return;
      }

      ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
      if (ret) {
            pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
            return;
      }

      /* Reset fec phy */
      ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
      if (ret) {
            pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
            return;
      }

      gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
      if (ret) {
            pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
            return;
      }

      mdelay(1);
      gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
}

static struct fec_platform_data mx28_fec_pdata[] = {
      {
            /* fec0 */
            .phy = PHY_INTERFACE_MODE_RMII,
      }, {
            /* fec1 */
            .phy = PHY_INTERFACE_MODE_RMII,
      },
};

static void __init mx28evk_init(void)
{
      mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));

      mx28_add_duart();

      mx28evk_fec_reset();
      mx28_add_fec(0, &mx28_fec_pdata[0]);
      mx28_add_fec(1, &mx28_fec_pdata[1]);
}

static void __init mx28evk_timer_init(void)
{
      mx28_clocks_init();
}

static struct sys_timer mx28evk_timer = {
      .init = mx28evk_timer_init,
};

MACHINE_START(MX28EVK, "Freescale MX28 EVK")
      /* Maintainer: Freescale Semiconductor, Inc. */
      .map_io           = mx28_map_io,
      .init_irq   = mx28_init_irq,
      .init_machine     = mx28evk_init,
      .timer            = &mx28evk_timer,
MACHINE_END

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