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 */ 26 static struct omap_xhci omap; 27 28 static int omap_xhci_core_init(struct omap_xhci *omap) 29 { 30 int ret = 0; 31 32 usb_phy_power(1); 33 omap_enable_phy(omap); 34 35 ret = dwc3_core_init(omap->dwc3_reg); 36 if (ret) { 37 debug("%s:failed to initialize core\n", __func__); 38 return ret; 39 } 40 41 /* We are hard-coding DWC3 core to Host Mode */ 42 dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); 43 44 return ret; 45 } 46 47 static void omap_xhci_core_exit(struct omap_xhci *omap) 48 { 49 usb_phy_power(0); 50 } 51 52 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) 53 { 54 struct omap_xhci *ctx = &omap; 55 int ret = 0; 56 57 ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE; 58 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); 59 ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE; 60 ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE; 61 62 ret = board_usb_init(index, USB_INIT_HOST); 63 if (ret != 0) { 64 puts("Failed to initialize board for USB\n"); 65 return ret; 66 } 67 68 ret = omap_xhci_core_init(ctx); 69 if (ret < 0) { 70 puts("Failed to initialize xhci\n"); 71 return ret; 72 } 73 74 *hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE); 75 *hcor = (struct xhci_hcor *)((uint32_t) *hccr 76 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 77 78 debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n", 79 (uint32_t)*hccr, (uint32_t)*hcor, 80 (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 81 82 return ret; 83 } 84 85 void xhci_hcd_stop(int index) 86 { 87 struct omap_xhci *ctx = &omap; 88 89 omap_xhci_core_exit(ctx); 90 board_usb_cleanup(index, USB_INIT_HOST); 91 } 92