drivers/usb/host/ehci-atmel.c

   1 /*
   2  * (C) Copyright 2012
   3  * Atmel Semiconductor <www.atmel.com>
   4  * Written-by: Bo Shen <voice.shen@atmel.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <usb.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/clk.h>
  13
  14 #include "ehci.h"
  15
  16 int ehci_hcd_init(int index, enum usb_init_type init,
  17                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
  18 {
  19         /* Enable UTMI PLL */
  20         if (at91_upll_clk_enable())
  21                 return -1;
  22
  23         /* Enable USB Host clock */
  24         at91_periph_clk_enable(ATMEL_ID_UHPHS);
  25
  26         *hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI;
  27         *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
  28                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
  29
  30         return 0;
  31 }
  32
  33 int ehci_hcd_stop(int index)
  34 {
  35         /* Disable USB Host Clock */
  36         at91_periph_clk_disable(ATMEL_ID_UHPHS);
  37
  38         /* Disable UTMI PLL */
  39         if (at91_upll_clk_disable())
  40                 return -1;
  41
  42         return 0;
  43 }