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
  31 int 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
  39 int 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
  47 int 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) */