[people/ms/u-boot.git] / cpu / arm920t / at91rm9200 / usb.c

/*
 * (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_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
# ifdef CONFIG_AT91RM9200

#include <asm/arch/hardware.h>

int usb_cpu_init(void)
{
	/* 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(void)
{
	/* 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(void)
{
	return usb_cpu_stop();
}

# endif /* CONFIG_AT91RM9200 */
#endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */
Commit	Line	Data
301f1aa3 MK	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
6d0f6bcf	26	#if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
301f1aa3 MK	27	# ifdef CONFIG_AT91RM9200
	28
	29	#include <asm/arch/hardware.h>
	30
9c4884f5	31	int usb_cpu_init(void)
301f1aa3 MK	32	{
	33	/* Enable USB host clock. */
	34	AT91C_PMC_SCER = AT91C_PMC_UHP; / 48MHz clock enabled for UHP */
	35	AT91C_PMC_PCER = 1 << AT91C_ID_UHP; / Peripheral Clock Enable Register */
	36	return 0;
	37	}
	38
9c4884f5	39	int usb_cpu_stop(void)
301f1aa3 MK	40	{
	41	/* Initialization failed */
	42	AT91C_PMC_PCDR = 1 << AT91C_ID_UHP; / Peripheral Clock Disable Register */
	43	AT91C_PMC_SCDR = AT91C_PMC_UHP; / 48MHz clock disabled for UHP */
	44	return 0;
	45	}
ddf83a2f	46
9c4884f5	47	int usb_cpu_init_fail(void)
ddf83a2f	48	{
9c4884f5	49	return usb_cpu_stop();
ddf83a2f MK	50	}
ddf83a2f MK	51
301f1aa3	52	# endif /* CONFIG_AT91RM9200 */
6d0f6bcf	53	#endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */