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 */ 25 static struct omap_xhci omap; 26 27 static 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 46 static void omap_xhci_core_exit(struct omap_xhci *omap) 47 { 48 usb_phy_power(0); 49 } 50 51 int 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 84 void 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