drivers/usb/host/xhci-mvebu.c

   1 /*
   2  * Copyright (C) 2015 Marvell International Ltd.
   3  *
   4  * MVEBU USB HOST xHCI Controller
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <fdtdec.h>
  12 #include <usb.h>
  13 #include <power/regulator.h>
  14 #include <asm/gpio.h>
  15
  16 #include "xhci.h"
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 struct mvebu_xhci_platdata {
  21         fdt_addr_t hcd_base;
  22 };
  23
  24 /**
  25  * Contains pointers to register base addresses
  26  * for the usb controller.
  27  */
  28 struct mvebu_xhci {
  29         struct xhci_ctrl ctrl;  /* Needs to come first in this struct! */
  30         struct usb_platdata usb_plat;
  31         struct xhci_hccr *hcd;
  32 };
  33
  34 /*
  35  * Dummy implementation that can be overwritten by a board
  36  * specific function
  37  */
  38 __weak int board_xhci_enable(void)
  39 {
  40         return 0;
  41 }
  42
  43 static int xhci_usb_probe(struct udevice *dev)
  44 {
  45         struct mvebu_xhci_platdata *plat = dev_get_platdata(dev);
  46         struct mvebu_xhci *ctx = dev_get_priv(dev);
  47         struct xhci_hcor *hcor;
  48         int len, ret;
  49         struct udevice *regulator;
  50
  51         ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
  52         len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
  53         hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
  54
  55         ret = device_get_supply_regulator(dev, "vbus-supply", &regulator);
  56         if (!ret) {
  57                 ret = regulator_set_enable(regulator, true);
  58                 if (ret) {
  59                         printf("Failed to turn ON the VBUS regulator\n");
  60                         return ret;
  61                 }
  62         }
  63
  64         /* Enable USB xHCI (VBUS, reset etc) in board specific code */
  65         board_xhci_enable();
  66
  67         return xhci_register(dev, ctx->hcd, hcor);
  68 }
  69
  70 static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
  71 {
  72         struct mvebu_xhci_platdata *plat = dev_get_platdata(dev);
  73
  74         /*
  75          * Get the base address for XHCI controller from the device node
  76          */
  77         plat->hcd_base = dev_get_addr(dev);
  78         if (plat->hcd_base == FDT_ADDR_T_NONE) {
  79                 debug("Can't get the XHCI register base address\n");
  80                 return -ENXIO;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static const struct udevice_id xhci_usb_ids[] = {
  87         { .compatible = "marvell,armada3700-xhci" },
  88         { .compatible = "marvell,armada-8k-xhci" },
  89         { }
  90 };
  91
  92 U_BOOT_DRIVER(usb_xhci) = {
  93         .name   = "xhci_mvebu",
  94         .id     = UCLASS_USB,
  95         .of_match = xhci_usb_ids,
  96         .ofdata_to_platdata = xhci_usb_ofdata_to_platdata,
  97         .probe = xhci_usb_probe,
  98         .remove = xhci_deregister,
  99         .ops    = &xhci_usb_ops,
 100         .platdata_auto_alloc_size = sizeof(struct mvebu_xhci_platdata),
 101         .priv_auto_alloc_size = sizeof(struct mvebu_xhci),
 102         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 103 };