summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/gpmc-smsc911x.c
blob: 5e5880d6d099e9a17e29436f7515f27ad2f94093 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
/*
 * 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.
 */
#define pr_fmt(fmt) "%s: " fmt, __func__

#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 <linux/regulator/fixed.h>
#include <linux/regulator/machine.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 | IORESOURCE_IRQ_LOWLEVEL,
	},
};

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 regulator_consumer_supply gpmc_smsc911x_supply[] = {
	REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
	REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
};

/* Generic regulator definition to satisfy smsc911x */
static struct regulator_init_data gpmc_smsc911x_reg_init_data = {
	.constraints = {
		.min_uV			= 3300000,
		.max_uV			= 3300000,
		.valid_modes_mask	= REGULATOR_MODE_NORMAL
					| REGULATOR_MODE_STANDBY,
		.valid_ops_mask		= REGULATOR_CHANGE_MODE
					| REGULATOR_CHANGE_STATUS,
	},
	.num_consumer_supplies	= ARRAY_SIZE(gpmc_smsc911x_supply),
	.consumer_supplies	= gpmc_smsc911x_supply,
};

static struct fixed_voltage_config gpmc_smsc911x_fixed_reg_data = {
	.supply_name		= "gpmc_smsc911x",
	.microvolts		= 3300000,
	.gpio			= -EINVAL,
	.startup_delay		= 0,
	.enable_high		= 0,
	.enabled_at_boot	= 1,
	.init_data		= &gpmc_smsc911x_reg_init_data,
};

/*
 * Platform device id of 42 is a temporary fix to avoid conflicts
 * with other reg-fixed-voltage devices. The real fix should
 * involve the driver core providing a way of dynamically
 * assigning a unique id on registration for platform devices
 * in the same name space.
 */
static struct platform_device gpmc_smsc911x_regulator = {
	.name		= "reg-fixed-voltage",
	.id		= 42,
	.dev = {
		.platform_data	= &gpmc_smsc911x_fixed_reg_data,
	},
};

/*
 * 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)
{
	struct platform_device *pdev;
	unsigned long cs_mem_base;
	int ret;

	gpmc_cfg = board_data;

	if (!gpmc_cfg->id) {
		ret = platform_device_register(&gpmc_smsc911x_regulator);
		if (ret < 0) {
			pr_err("Unable to register smsc911x regulators: %d\n",
			       ret);
			return;
		}
	}

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

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

	if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) {
		pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq);
		goto free1;
	}

	gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);

	if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
		ret = gpio_request_one(gpmc_cfg->gpio_reset,
				       GPIOF_OUT_INIT_HIGH, "smsc911x reset");
		if (ret) {
			pr_err("Failed to request reset GPIO%d\n",
			       gpmc_cfg->gpio_reset);
			goto free2;
		}

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

	if (gpmc_cfg->flags)
		gpmc_smsc911x_config.flags = gpmc_cfg->flags;

	pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id,
		 gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources),
		 &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config));
	if (!pdev) {
		pr_err("Unable to register platform 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);

	pr_err("Could not initialize smsc911x device\n");
}