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