drivers/usb/host/ehci-fsl.c

   1 /*
   2  * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
   3  *
   4  * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
   5  *
   6  * Author: Tor Krill tor@excito.com
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <pci.h>
  13 #include <usb.h>
  14 #include <asm/io.h>
  15 #include <usb/ehci-fsl.h>
  16 #include <hwconfig.h>
  17
  18 #include "ehci.h"
  19
  20 /* Check USB PHY clock valid */
  21 static int usb_phy_clk_valid(struct usb_ehci *ehci)
  22 {
  23         if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
  24                         in_be32(&ehci->prictrl))) {
  25                 printf("USB PHY clock invalid!\n");
  26                 return 0;
  27         } else {
  28                 return 1;
  29         }
  30 }
  31
  32 /*
  33  * Create the appropriate control structures to manage
  34  * a new EHCI host controller.
  35  *
  36  * Excerpts from linux ehci fsl driver.
  37  */
  38 int ehci_hcd_init(int index, enum usb_init_type init,
  39                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
  40 {
  41         struct usb_ehci *ehci = NULL;
  42         const char *phy_type = NULL;
  43         size_t len;
  44         char current_usb_controller[5];
  45 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
  46         char usb_phy[5];
  47
  48         usb_phy[0] = '\0';
  49 #endif
  50         memset(current_usb_controller, '\0', 5);
  51         snprintf(current_usb_controller, 4, "usb%d", index+1);
  52
  53         switch (index) {
  54         case 0:
  55                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
  56                 break;
  57         case 1:
  58                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
  59                 break;
  60         default:
  61                 printf("ERROR: wrong controller index!!\n");
  62                 break;
  63         };
  64
  65         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
  66         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
  67                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
  68
  69         /* Set to Host mode */
  70         setbits_le32(&ehci->usbmode, CM_HOST);
  71
  72         out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
  73         out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
  74
  75         /* Init phy */
  76         if (hwconfig_sub(current_usb_controller, "phy_type"))
  77                 phy_type = hwconfig_subarg(current_usb_controller,
  78                                 "phy_type", &len);
  79         else
  80                 phy_type = getenv("usb_phy_type");
  81
  82         if (!phy_type) {
  83 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
  84                 /* if none specified assume internal UTMI */
  85                 strcpy(usb_phy, "utmi");
  86                 phy_type = usb_phy;
  87 #else
  88                 printf("WARNING: USB phy type not defined !!\n");
  89                 return -1;
  90 #endif
  91         }
  92
  93         if (!strncmp(phy_type, "utmi", 4)) {
  94 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
  95                 setbits_be32(&ehci->control, PHY_CLK_SEL_UTMI);
  96                 setbits_be32(&ehci->control, UTMI_PHY_EN);
  97                 udelay(1000); /* delay required for PHY Clk to appear */
  98 #endif
  99                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
 100                 setbits_be32(&ehci->control, USB_EN);
 101         } else {
 102                 setbits_be32(&ehci->control, PHY_CLK_SEL_ULPI);
 103                 clrsetbits_be32(&ehci->control, UTMI_PHY_EN, USB_EN);
 104                 udelay(1000); /* delay required for PHY Clk to appear */
 105                 if (!usb_phy_clk_valid(ehci))
 106                         return -EINVAL;
 107                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
 108         }
 109
 110         out_be32(&ehci->prictrl, 0x0000000c);
 111         out_be32(&ehci->age_cnt_limit, 0x00000040);
 112         out_be32(&ehci->sictrl, 0x00000001);
 113
 114         in_le32(&ehci->usbmode);
 115
 116         return 0;
 117 }
 118
 119 /*
 120  * Destroy the appropriate control structures corresponding
 121  * the the EHCI host controller.
 122  */
 123 int ehci_hcd_stop(int index)
 124 {
 125         return 0;
 126 }