git.sur5r.net Git - u-boot/blob - drivers/usb/host/ohci-at91.c

   1 /*
   2  * (C) Copyright 2006
   3  * DENX Software Engineering <mk@denx.de>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9
  10 #if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
  11
  12 #include <asm/io.h>
  13 #include <asm/arch/hardware.h>
  14 #include <asm/arch/at91_pmc.h>
  15 #include <asm/arch/clk.h>
  16
  17 int usb_cpu_init(void)
  18 {
  19         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
  20
  21 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
  22     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
  23         defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9N12)
  24         /* Enable PLLB */
  25         writel(get_pllb_init(), &pmc->pllbr);
  26         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
  27                 ;
  28 #ifdef CONFIG_AT91SAM9N12
  29         writel(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2, &pmc->usb);
  30 #endif
  31 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
  32         defined(CONFIG_AT91SAM9X5) || defined(CONFIG_SAMA5D3)
  33         /* Enable UPLL */
  34         writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
  35                 &pmc->uckr);
  36         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
  37                 ;
  38
  39         /* Select PLLA as input clock of OHCI */
  40         writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
  41 #endif
  42
  43         /* Enable USB host clock. */
  44 #ifdef CONFIG_SAMA5D3
  45         writel(1 << (ATMEL_ID_UHP - 32), &pmc->pcer1);
  46 #else
  47         writel(1 << ATMEL_ID_UHP, &pmc->pcer);
  48 #endif
  49
  50 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  51         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
  52 #else
  53         writel(ATMEL_PMC_UHP, &pmc->scer);
  54 #endif
  55
  56         return 0;
  57 }
  58
  59 int usb_cpu_stop(void)
  60 {
  61         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
  62
  63         /* Disable USB host clock. */
  64 #ifdef CONFIG_SAMA5D3
  65         writel(1 << (ATMEL_ID_UHP - 32), &pmc->pcdr1);
  66 #else
  67         writel(1 << ATMEL_ID_UHP, &pmc->pcdr);
  68 #endif
  69
  70 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  71         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
  72 #else
  73         writel(ATMEL_PMC_UHP, &pmc->scdr);
  74 #endif
  75
  76 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
  77         defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
  78         defined(CONFIG_AT91SAM9N12)
  79 #ifdef CONFIG_AT91SAM9N12
  80         writel(0, &pmc->usb);
  81 #endif
  82         /* Disable PLLB */
  83         writel(0, &pmc->pllbr);
  84         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
  85                 ;
  86 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
  87         defined(CONFIG_AT91SAM9X5) || defined(CONFIG_SAMA5D3)
  88         /* Disable UPLL */
  89         writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
  90         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
  91                 ;
  92 #endif
  93
  94         return 0;
  95 }
  96
  97 int usb_cpu_init_fail(void)
  98 {
  99         return usb_cpu_stop();
 100 }
 101
 102 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */