diff options
Diffstat (limited to 'cpu/arm920t/at91rm9200/usb.c')
| -rw-r--r-- | cpu/arm920t/at91rm9200/usb.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/cpu/arm920t/at91rm9200/usb.c b/cpu/arm920t/at91rm9200/usb.c new file mode 100644 index 0000000..98e3cdd --- /dev/null +++ b/cpu/arm920t/at91rm9200/usb.c @@ -0,0 +1,53 @@ +/* + * (C) Copyright 2006 + * DENX Software Engineering <mk@denx.de> + * + * 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; 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#if defined(CONFIG_USB_OHCI) && defined(CFG_USB_OHCI_CPU_INIT) +# ifdef CONFIG_AT91RM9200 + +#include <asm/arch/hardware.h> + +int usb_cpu_init() +{ + /* Enable USB host clock. */ + *AT91C_PMC_SCER = AT91C_PMC_UHP; /* 48MHz clock enabled for UHP */ + *AT91C_PMC_PCER = 1 << AT91C_ID_UHP; /* Peripheral Clock Enable Register */ + return 0; +} + +int usb_cpu_stop() +{ + /* Initialization failed */ + *AT91C_PMC_PCDR = 1 << AT91C_ID_UHP; /* Peripheral Clock Disable Register */ + *AT91C_PMC_SCDR = AT91C_PMC_UHP; /* 48MHz clock disabled for UHP */ + return 0; +} + +int usb_cpu_init_fail() +{ + usb_cpu_stop(); +} + +# endif /* CONFIG_AT91RM9200 */ +#endif /* defined(CONFIG_USB_OHCI) && defined(CFG_USB_OHCI_CPU_INIT) */ |