LXR linux/arch/arm/mach-omap2/gpmc-smsc911x.c

   1/*
   2 * linux/arch/arm/mach-omap2/gpmc-smsc911x.c
   3 *
   4 * Copyright (C) 2009 Li-Pro.Net
   5 * Stephan Linz <linz@li-pro.net>
   6 *
   7 * Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 */
  13#define pr_fmt(fmt) "%s: " fmt, __func__
  14
  15#include <linux/kernel.h>
  16#include <linux/platform_device.h>
  17#include <linux/gpio.h>
  18#include <linux/delay.h>
  19#include <linux/interrupt.h>
  20#include <linux/io.h>
  21#include <linux/smsc911x.h>
  22
  23#include "gpmc.h"
  24#include "gpmc-smsc911x.h"
  25
  26static struct resource gpmc_smsc911x_resources[] = {
  27        [0] = {
  28                .flags          = IORESOURCE_MEM,
  29        },
  30        [1] = {
  31                .flags          = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  32        },
  33};
  34
  35static struct smsc911x_platform_config gpmc_smsc911x_config = {
  36        .phy_interface  = PHY_INTERFACE_MODE_MII,
  37        .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  38        .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  39};
  40
  41/*
  42 * Initialize smsc911x device connected to the GPMC. Note that we
  43 * assume that pin multiplexing is done in the board-*.c file,
  44 * or in the bootloader.
  45 */
  46void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg)
  47{
  48        struct platform_device *pdev;
  49        unsigned long cs_mem_base;
  50        int ret;
  51
  52        if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
  53                pr_err("Failed to request GPMC mem region\n");
  54                return;
  55        }
  56
  57        gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
  58        gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
  59
  60        if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
  61                pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
  62                goto free1;
  63        }
  64
  65        gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
  66
  67        if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
  68                ret = gpio_request_one(gpmc_cfg->gpio_reset,
  69                                       GPIOF_OUT_INIT_HIGH, "smsc911x reset");
  70                if (ret) {
  71                        pr_err("Failed to request reset GPIO%d\n",
  72                               gpmc_cfg->gpio_reset);
  73                        goto free2;
  74                }
  75
  76                gpio_set_value(gpmc_cfg->gpio_reset, 0);
  77                msleep(100);
  78                gpio_set_value(gpmc_cfg->gpio_reset, 1);
  79        }
  80
  81        gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT;
  82
  83        pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
  84                 gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
  85                 &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
  86        if (IS_ERR(pdev)) {
  87                pr_err("Unable to register platform device\n");
  88                gpio_free(gpmc_cfg->gpio_reset);
  89                goto free2;
  90        }
  91
  92        return;
  93
  94free2:
  95        gpio_free(gpmc_cfg->gpio_irq);
  96free1:
  97        gpmc_cs_free(gpmc_cfg->cs);
  98
  99        pr_err("Could not initialize smsc911x device\n");
 100}
 101