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

   1/*
   2 * OMAP USB HOST xHCI Controller
   3 *
   4 * (C) Copyright 2013
   5 * Texas Instruments, <www.ti.com>
   6 *
   7 * Author: Dan Murphy <dmurphy@ti.com>
   8 *
   9 * SPDX-License-Identifier:     GPL-2.0+
  10 */
  11
  12#include <common.h>
  13#include <usb.h>
  14#include <linux/errno.h>
  15#include <asm/omap_common.h>
  16#include <asm/arch/cpu.h>
  17#include <asm/arch/sys_proto.h>
  18
  19#include <linux/compat.h>
  20#include <linux/usb/dwc3.h>
  21#include <linux/usb/xhci-omap.h>
  22
  23#include "xhci.h"
  24
  25/* Declare global data pointer */
  26DECLARE_GLOBAL_DATA_PTR;
  27
  28static struct omap_xhci omap;
  29
  30__weak int __board_usb_init(int index, enum usb_init_type init)
  31{
  32        return 0;
  33}
  34int board_usb_init(int index, enum usb_init_type init)
  35        __attribute__((weak, alias("__board_usb_init")));
  36
  37static int omap_xhci_core_init(struct omap_xhci *omap)
  38{
  39        int ret = 0;
  40
  41        usb_phy_power(1);
  42        omap_enable_phy(omap);
  43
  44        ret = dwc3_core_init(omap->dwc3_reg);
  45        if (ret) {
  46                debug("%s:failed to initialize core\n", __func__);
  47                return ret;
  48        }
  49
  50        /* We are hard-coding DWC3 core to Host Mode */
  51        dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
  52
  53        return ret;
  54}
  55
  56static void omap_xhci_core_exit(struct omap_xhci *omap)
  57{
  58        usb_phy_power(0);
  59}
  60
  61int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
  62{
  63        struct omap_xhci *ctx = &omap;
  64        int ret = 0;
  65
  66        ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE;
  67        ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
  68        ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE;
  69        ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE;
  70
  71        ret = board_usb_init(index, USB_INIT_HOST);
  72        if (ret != 0) {
  73                puts("Failed to initialize board for USB\n");
  74                return ret;
  75        }
  76
  77        ret = omap_xhci_core_init(ctx);
  78        if (ret < 0) {
  79                puts("Failed to initialize xhci\n");
  80                return ret;
  81        }
  82
  83        *hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE);
  84        *hcor = (struct xhci_hcor *)((uint32_t) *hccr
  85                                + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
  86
  87        debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n",
  88              (uint32_t)*hccr, (uint32_t)*hcor,
  89              (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
  90
  91        return ret;
  92}
  93
  94void xhci_hcd_stop(int index)
  95{
  96        struct omap_xhci *ctx = &omap;
  97
  98        omap_xhci_core_exit(ctx);
  99        board_usb_cleanup(index, USB_INIT_HOST);
 100}
 101