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 #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
  22         /* Enable PLLB */
  23         writel(get_pllb_init(), &pmc->pllbr);
  24         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
  25                 ;
  26 #ifdef CONFIG_AT91SAM9N12
  27         at91_usb_clk_init(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2);
  28 #endif
  29 #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
  30         if (at91_upll_clk_enable())
  31                 return -1;
  32
  33         at91_usb_clk_init(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10);
  34 #endif
  35
  36         at91_periph_clk_enable(ATMEL_ID_UHP);
  37
  38         at91_system_clk_enable(ATMEL_PMC_UHP);
  39 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  40         at91_system_clk_enable(AT91_PMC_HCK0);
  41 #endif
  42
  43         return 0;
  44 }
  45
  46 int usb_cpu_stop(void)
  47 {
  48         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
  49
  50         at91_periph_clk_disable(ATMEL_ID_UHP);
  51
  52         at91_system_clk_disable(ATMEL_PMC_UHP);
  53 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  54         at91_system_clk_disable(AT91_PMC_HCK0);
  55 #endif
  56
  57 #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
  58 #ifdef CONFIG_AT91SAM9N12
  59         at91_usb_clk_init(0);
  60 #endif
  61         /* Disable PLLB */
  62         writel(0, &pmc->pllbr);
  63         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
  64                 ;
  65 #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
  66         if (at91_upll_clk_disable())
  67                 return -1;
  68 #endif
  69
  70         return 0;
  71 }
  72
  73 int usb_cpu_init_fail(void)
  74 {
  75         return usb_cpu_stop();
  76 }
  77
  78 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */