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gpmc-smsc911x.c

/*
 * linux/arch/arm/mach-omap2/gpmc-smsc911x.c
 *
 * Copyright (C) 2009 Li-Pro.Net
 * Stephan Linz <linz@li-pro.net>
 *
 * Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c
 *
 * 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/kernel.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/smsc911x.h>

#include <plat/board.h>
#include <plat/gpmc.h>
#include <plat/gpmc-smsc911x.h>

static struct omap_smsc911x_platform_data *gpmc_cfg;

static struct resource gpmc_smsc911x_resources[] = {
      [0] = {
            .flags            = IORESOURCE_MEM,
      },
      [1] = {
            .flags            = IORESOURCE_IRQ,
      },
};

static struct smsc911x_platform_config gpmc_smsc911x_config = {
      .phy_interface    = PHY_INTERFACE_MODE_MII,
      .irq_polarity     = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
      .irq_type   = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
      .flags            = SMSC911X_USE_16BIT,
};

static struct platform_device gpmc_smsc911x_device = {
      .name       = "smsc911x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(gpmc_smsc911x_resources),
      .resource   = gpmc_smsc911x_resources,
      .dev        = {
            .platform_data = &gpmc_smsc911x_config,
      },
};

/*
 * Initialize smsc911x device connected to the GPMC. Note that we
 * assume that pin multiplexing is done in the board-*.c file,
 * or in the bootloader.
 */
void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
{
      unsigned long cs_mem_base;
      int ret;

      gpmc_cfg = board_data;

      if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
            printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
            return;
      }

      gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
      gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;

      if (gpio_request(gpmc_cfg->gpio_irq, "smsc911x irq") < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
                        gpmc_cfg->gpio_irq);
            goto free1;
      }

      gpio_direction_input(gpmc_cfg->gpio_irq);
      gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
      gpmc_smsc911x_resources[1].flags |=
                              (gpmc_cfg->flags & IRQF_TRIGGER_MASK);

      if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
            ret = gpio_request(gpmc_cfg->gpio_reset, "smsc911x reset");
            if (ret) {
                  printk(KERN_ERR "Failed to request GPIO%d for smsc911x reset\n",
                              gpmc_cfg->gpio_reset);
                  goto free2;
            }

            gpio_direction_output(gpmc_cfg->gpio_reset, 1);
            gpio_set_value(gpmc_cfg->gpio_reset, 0);
            msleep(100);
            gpio_set_value(gpmc_cfg->gpio_reset, 1);
      }

      if (platform_device_register(&gpmc_smsc911x_device) < 0) {
            printk(KERN_ERR "Unable to register smsc911x device\n");
            gpio_free(gpmc_cfg->gpio_reset);
            goto free2;
      }

      return;

free2:
      gpio_free(gpmc_cfg->gpio_irq);
free1:
      gpmc_cs_free(gpmc_cfg->cs);

      printk(KERN_ERR "Could not initialize smsc911x\n");
}

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