summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-mxs/mach-mx28evk.c
blob: 8e2c5975001ef2f331da045cc894301a248a7c53 (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
/*
 * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/clk.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>

#include <mach/common.h>
#include <mach/iomux-mx28.h>

#include "devices-mx28.h"
#include "gpio.h"

#define MX28EVK_FEC_PHY_POWER	MXS_GPIO_NR(2, 15)
#define MX28EVK_FEC_PHY_RESET	MXS_GPIO_NR(4, 13)

static const iomux_cfg_t mx28evk_pads[] __initconst = {
	/* duart */
	MX28_PAD_PWM0__DUART_RX |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	MX28_PAD_PWM1__DUART_TX |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),

	/* fec0 */
	MX28_PAD_ENET0_MDC__ENET0_MDC |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_MDIO__ENET0_MDIO |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET_CLK__CLKCTRL_ENET |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	/* fec1 */
	MX28_PAD_ENET0_CRS__ENET1_RX_EN |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_RXD2__ENET1_RXD0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_RXD3__ENET1_RXD1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_COL__ENET1_TX_EN |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_TXD2__ENET1_TXD0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_ENET0_TXD3__ENET1_TXD1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	/* phy power line */
	MX28_PAD_SSP1_DATA3__GPIO_2_15 |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	/* phy reset line */
	MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
};

/* fec */
static void __init mx28evk_fec_reset(void)
{
	int ret;
	struct clk *clk;

	/* Enable fec phy clock */
	clk = clk_get_sys("pll2", NULL);
	if (!IS_ERR(clk))
		clk_enable(clk);

	/* Power up fec phy */
	ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
	if (ret) {
		pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
		return;
	}

	ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
	if (ret) {
		pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
		return;
	}

	/* Reset fec phy */
	ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
	if (ret) {
		pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
		return;
	}

	gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
	if (ret) {
		pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
		return;
	}

	mdelay(1);
	gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
}

static struct fec_platform_data mx28_fec_pdata[] = {
	{
		/* fec0 */
		.phy = PHY_INTERFACE_MODE_RMII,
	}, {
		/* fec1 */
		.phy = PHY_INTERFACE_MODE_RMII,
	},
};

static void __init mx28evk_init(void)
{
	mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));

	mx28_add_duart();

	mx28evk_fec_reset();
	mx28_add_fec(0, &mx28_fec_pdata[0]);
	mx28_add_fec(1, &mx28_fec_pdata[1]);
}

static void __init mx28evk_timer_init(void)
{
	mx28_clocks_init();
}

static struct sys_timer mx28evk_timer = {
	.init	= mx28evk_timer_init,
};

MACHINE_START(MX28EVK, "Freescale MX28 EVK")
	/* Maintainer: Freescale Semiconductor, Inc. */
	.map_io		= mx28_map_io,
	.init_irq	= mx28_init_irq,
	.init_machine	= mx28evk_init,
	.timer		= &mx28evk_timer,
MACHINE_END
OpenPOWER on IntegriCloud