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 <asm-generic/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 */
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static struct omap_xhci omap;
  29
  30 __weak int __board_usb_init(int index, enum usb_init_type init)
  31 {
  32         return 0;
  33 }
  34 int board_usb_init(int index, enum usb_init_type init)
  35         __attribute__((weak, alias("__board_usb_init")));
  36
  37 static 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
  56 static void omap_xhci_core_exit(struct omap_xhci *omap)
  57 {
  58         usb_phy_power(0);
  59 }
  60
  61 int 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
  94 void 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 }