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 #include <asm/io.h>
  29 #include <asm/arch/hardware.h>
  30 #include <asm/arch/at91_pmc.h>
  31 #include <asm/arch/clk.h>
  32
  33 int usb_cpu_init(void)
  34 {
  35         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
  36
  37 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
  38     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
  39     defined(CONFIG_AT91SAM9261)
  40         /* Enable PLLB */
  41         writel(get_pllb_init(), &pmc->pllbr);
  42         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
  43                 ;
  44 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
  45         defined(CONFIG_AT91SAM9X5)
  46         /* Enable UPLL */
  47         writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
  48                 &pmc->uckr);
  49         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
  50                 ;
  51
  52         /* Select PLLA as input clock of OHCI */
  53         writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
  54 #endif
  55
  56         /* Enable USB host clock. */
  57         writel(1 << ATMEL_ID_UHP, &pmc->pcer);
  58 #ifdef CONFIG_AT91SAM9261
  59         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
  60 #else
  61         writel(ATMEL_PMC_UHP, &pmc->scer);
  62 #endif
  63
  64         return 0;
  65 }
  66
  67 int usb_cpu_stop(void)
  68 {
  69         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
  70
  71         /* Disable USB host clock. */
  72         writel(1 << ATMEL_ID_UHP, &pmc->pcdr);
  73 #ifdef CONFIG_AT91SAM9261
  74         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
  75 #else
  76         writel(ATMEL_PMC_UHP, &pmc->scdr);
  77 #endif
  78
  79 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
  80     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20)
  81         /* Disable PLLB */
  82         writel(0, &pmc->pllbr);
  83         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
  84                 ;
  85 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
  86         defined(CONFIG_AT91SAM9X5)
  87         /* Disable UPLL */
  88         writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
  89         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
  90                 ;
  91 #endif
  92
  93         return 0;
  94 }
  95
  96 int usb_cpu_init_fail(void)
  97 {
  98         return usb_cpu_stop();
  99 }
 100
 101 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */