LXR uboot/arch/arm/cpu/arm920t/at91rm9200/usb.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# ifdef CONFIG_AT91RM9200
  28
  29#include <asm/arch/hardware.h>
  30
  31int usb_cpu_init(void)
  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
  39int usb_cpu_stop(void)
  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}
  46
  47int usb_cpu_init_fail(void)
  48{
  49        return usb_cpu_stop();
  50}
  51
  52# endif /* CONFIG_AT91RM9200 */
  53#endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */
  54