]> git.karo-electronics.de Git - karo-tx-uboot.git/blob - drivers/usb/host/ohci-at91.c
Merge branch 'master' of git://git.denx.de/u-boot-arm
[karo-tx-uboot.git] / drivers / usb / host / ohci-at91.c
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(CONFIG_SYS_USB_OHCI_CPU_INIT)
27
28 #ifndef CONFIG_AT91_LEGACY
29 #define CONFIG_AT91_LEGACY
30 #warning Please update to use C structur SoC access !
31 #endif
32
33 #include <asm/arch/hardware.h>
34 #include <asm/arch/io.h>
35 #include <asm/arch/at91_pmc.h>
36 #include <asm/arch/clk.h>
37
38 int usb_cpu_init(void)
39 {
40
41 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
42     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
43     defined(CONFIG_AT91SAM9261)
44         /* Enable PLLB */
45         at91_sys_write(AT91_CKGR_PLLBR, get_pllb_init());
46         while ((at91_sys_read(AT91_PMC_SR) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
47                 ;
48 #endif
49
50         /* Enable USB host clock. */
51         at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_UHP);
52 #ifdef CONFIG_AT91SAM9261
53         at91_sys_write(AT91_PMC_SCER, AT91_PMC_UHP | AT91_PMC_HCK0);
54 #else
55         at91_sys_write(AT91_PMC_SCER, AT91_PMC_UHP);
56 #endif
57
58         return 0;
59 }
60
61 int usb_cpu_stop(void)
62 {
63         /* Disable USB host clock. */
64         at91_sys_write(AT91_PMC_PCDR, 1 << AT91_ID_UHP);
65 #ifdef CONFIG_AT91SAM9261
66         at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP | AT91_PMC_HCK0);
67 #else
68         at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP);
69 #endif
70
71 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
72     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20)
73         /* Disable PLLB */
74         at91_sys_write(AT91_CKGR_PLLBR, 0);
75         while ((at91_sys_read(AT91_PMC_SR) & AT91_PMC_LOCKB) != 0)
76                 ;
77 #endif
78
79         return 0;
80 }
81
82 int usb_cpu_init_fail(void)
83 {
84         return usb_cpu_stop();
85 }
86
87 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */