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 <plat/board.h>
 24#include <plat/gpmc.h>
 25#include <plat/gpmc-smsc911x.h>
 26
 27static struct omap_smsc911x_platform_data *gpmc_cfg;
 28
 29static struct resource gpmc_smsc911x_resources[] = {
 30	[0] = {
 31		.flags		= IORESOURCE_MEM,
 32	},
 33	[1] = {
 34		.flags		= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
 35	},
 36};
 37
 38static struct smsc911x_platform_config gpmc_smsc911x_config = {
 39	.phy_interface	= PHY_INTERFACE_MODE_MII,
 40	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
 41	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
 42	.flags		= SMSC911X_USE_16BIT,
 43};
 44
 45/*
 46 * Initialize smsc911x device connected to the GPMC. Note that we
 47 * assume that pin multiplexing is done in the board-*.c file,
 48 * or in the bootloader.
 49 */
 50void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
 51{
 52	struct platform_device *pdev;
 53	unsigned long cs_mem_base;
 54	int ret;
 55
 56	gpmc_cfg = board_data;
 57
 58	if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
 59		pr_err("Failed to request GPMC mem region\n");
 60		return;
 61	}
 62
 63	gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
 64	gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
 65
 66	if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
 67		pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
 68		goto free1;
 69	}
 70
 71	gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
 72
 73	if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
 74		ret = gpio_request_one(gpmc_cfg->gpio_reset,
 75				       GPIOF_OUT_INIT_HIGH, "smsc911x reset");
 76		if (ret) {
 77			pr_err("Failed to request reset GPIO%d\n",
 78			       gpmc_cfg->gpio_reset);
 79			goto free2;
 80		}
 81
 82		gpio_set_value(gpmc_cfg->gpio_reset, 0);
 83		msleep(100);
 84		gpio_set_value(gpmc_cfg->gpio_reset, 1);
 85	}
 86
 87	if (gpmc_cfg->flags)
 88		gpmc_smsc911x_config.flags = gpmc_cfg->flags;
 89
 90	pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
 91		 gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
 92		 &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
 93	if (!pdev) {
 94		pr_err("Unable to register platform device\n");
 95		gpio_free(gpmc_cfg->gpio_reset);
 96		goto free2;
 97	}
 98
 99	return;
100
101free2:
102	gpio_free(gpmc_cfg->gpio_irq);
103free1:
104	gpmc_cs_free(gpmc_cfg->cs);
105
106	pr_err("Could not initialize smsc911x device\n");
107}