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