blob: cc9636c4b7f650ae438f7d5eefb90db7c350975e (
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
|
/*
* (C) Copyright 2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; version 2 of
* the License.
*
* 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 <common.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <driver.h>
#include <init.h>
#include <usb/usb.h>
#include <usb/usb_defs.h>
#include <usb/ehci.h>
#include <errno.h>
#include <io.h>
#include "ehci.h"
/* interface and function clocks; sometimes also an AHB clock */
static struct clk *iclk, *fclk;
static void atmel_start_clock(void)
{
clk_enable(iclk);
clk_enable(fclk);
}
static void atmel_stop_clock(void)
{
clk_disable(fclk);
clk_disable(iclk);
}
static int atmel_ehci_probe(struct device_d *dev)
{
struct resource *iores;
struct ehci_data data;
iclk = clk_get(dev, "ehci_clk");
if (IS_ERR(iclk)) {
dev_err(dev, "Error getting interface clock\n");
return -ENOENT;
}
fclk = clk_get(dev, "uhpck");
if (IS_ERR(fclk)) {
dev_err(dev, "Error getting function clock\n");
return -ENOENT;
}
/*
* Start the USB clocks.
*/
atmel_start_clock();
data.flags = 0;
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores))
return PTR_ERR(iores);
data.hccr = IOMEM(iores->start);
ehci_register(dev, &data);
return 0;
}
static void atmel_ehci_remove(struct device_d *dev)
{
/*
* Stop the USB clocks.
*/
atmel_stop_clock();
}
static struct driver_d atmel_ehci_driver = {
.name = "atmel-ehci",
.probe = atmel_ehci_probe,
.remove = atmel_ehci_remove,
};
device_platform_driver(atmel_ehci_driver);
|