LXR uboot/drivers/usb/host/xhci-omap.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * OMAP USB HOST xHCI Controller
   4 *
   5 * (C) Copyright 2013
   6 * Texas Instruments, <www.ti.com>
   7 *
   8 * Author: Dan Murphy <dmurphy@ti.com>
   9 */
  10
  11#include <common.h>
  12#include <usb.h>
  13#include <linux/errno.h>
  14#include <asm/omap_common.h>
  15#include <asm/arch/cpu.h>
  16#include <asm/arch/sys_proto.h>
  17
  18#include <linux/compat.h>
  19#include <linux/usb/dwc3.h>
  20#include <linux/usb/xhci-omap.h>
  21
  22#include "xhci.h"
  23
  24/* Declare global data pointer */
  25static struct omap_xhci omap;
  26
  27static int omap_xhci_core_init(struct omap_xhci *omap)
  28{
  29        int ret = 0;
  30
  31        usb_phy_power(1);
  32        omap_enable_phy(omap);
  33
  34        ret = dwc3_core_init(omap->dwc3_reg);
  35        if (ret) {
  36                debug("%s:failed to initialize core\n", __func__);
  37                return ret;
  38        }
  39
  40        /* We are hard-coding DWC3 core to Host Mode */
  41        dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
  42
  43        return ret;
  44}
  45
  46static void omap_xhci_core_exit(struct omap_xhci *omap)
  47{
  48        usb_phy_power(0);
  49}
  50
  51int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
  52{
  53        struct omap_xhci *ctx = &omap;
  54        int ret = 0;
  55
  56        ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE;
  57        ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
  58        ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE;
  59        ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE;
  60
  61        ret = board_usb_init(index, USB_INIT_HOST);
  62        if (ret != 0) {
  63                puts("Failed to initialize board for USB\n");
  64                return ret;
  65        }
  66
  67        ret = omap_xhci_core_init(ctx);
  68        if (ret < 0) {
  69                puts("Failed to initialize xhci\n");
  70                return ret;
  71        }
  72
  73        *hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE);
  74        *hcor = (struct xhci_hcor *)((uint32_t) *hccr
  75                                + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
  76
  77        debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n",
  78              (uint32_t)*hccr, (uint32_t)*hcor,
  79              (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
  80
  81        return ret;
  82}
  83
  84void xhci_hcd_stop(int index)
  85{
  86        struct omap_xhci *ctx = &omap;
  87
  88        omap_xhci_core_exit(ctx);
  89        board_usb_cleanup(index, USB_INIT_HOST);
  90}
  91