source: SVN/rincon/u-boot/cpu/arm920t/s3c24x0/usb.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 2.0 KB
Line 
1/*
2 * (C) Copyright 2006
3 * DENX Software Engineering <mk@denx.de>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25
26#if defined(CONFIG_USB_OHCI_NEW) && defined(CFG_USB_OHCI_CPU_INIT)
27# if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410)
28
29#if defined(CONFIG_S3C2400)
30# include <s3c2400.h>
31#elif defined(CONFIG_S3C2410)
32# include <s3c2410.h>
33#endif
34
35int usb_cpu_init (void)
36{
37
38        S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
39        S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
40
41        /*
42         * Set the 48 MHz UPLL clocking. Values are taken from
43         * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
44         */
45        clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
46        gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
47
48        /*
49         * Enable USB host clock.
50         */
51        clk_power->CLKCON |= (1 << 4);
52
53        return 0;
54}
55
56int usb_cpu_stop (void)
57{
58        S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
59        /* may not want to do this */
60        clk_power->CLKCON &= ~(1 << 4);
61        return 0;
62}
63
64int usb_cpu_init_fail (void)
65{
66        S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
67        clk_power->CLKCON &= ~(1 << 4);
68        return 0;
69}
70
71# endif /* defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) */
72#endif /* defined(CONFIG_USB_OHCI_NEW) && defined(CFG_USB_OHCI_CPU_INIT) */
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