drivers/usb/host/ohci-at91.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2006
   4  * DENX Software Engineering <mk@denx.de>
   5  */
   6
   7 #include <common.h>
   8 #include <asm/arch/clk.h>
   9
  10 int usb_cpu_init(void)
  11 {
  12 #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
  13         if (at91_pllb_clk_enable(get_pllb_init()))
  14                 return -1;
  15
  16 #ifdef CONFIG_AT91SAM9N12
  17         at91_usb_clk_init(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2);
  18 #endif
  19 #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
  20         if (at91_upll_clk_enable())
  21                 return -1;
  22
  23         at91_usb_clk_init(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10);
  24 #endif
  25
  26         at91_periph_clk_enable(ATMEL_ID_UHP);
  27
  28         at91_system_clk_enable(ATMEL_PMC_UHP);
  29 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  30         at91_system_clk_enable(AT91_PMC_HCK0);
  31 #endif
  32
  33         return 0;
  34 }
  35
  36 int usb_cpu_stop(void)
  37 {
  38         at91_periph_clk_disable(ATMEL_ID_UHP);
  39
  40         at91_system_clk_disable(ATMEL_PMC_UHP);
  41 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
  42         at91_system_clk_disable(AT91_PMC_HCK0);
  43 #endif
  44
  45 #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
  46 #ifdef CONFIG_AT91SAM9N12
  47         at91_usb_clk_init(0);
  48 #endif
  49
  50         if (at91_pllb_clk_disable())
  51                 return -1;
  52
  53 #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
  54         if (at91_upll_clk_disable())
  55                 return -1;
  56 #endif
  57
  58         return 0;
  59 }
  60
  61 int usb_cpu_init_fail(void)
  62 {
  63         return usb_cpu_stop();
  64 }