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 DECLARE_GLOBAL_DATA_PTR; 27 28 static struct omap_xhci omap; 29 30 static int omap_xhci_core_init(struct omap_xhci *omap) 31 { 32 int ret = 0; 33 34 usb_phy_power(1); 35 omap_enable_phy(omap); 36 37 ret = dwc3_core_init(omap->dwc3_reg); 38 if (ret) { 39 debug("%s:failed to initialize core\n", __func__); 40 return ret; 41 } 42 43 /* We are hard-coding DWC3 core to Host Mode */ 44 dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); 45 46 return ret; 47 } 48 49 static void omap_xhci_core_exit(struct omap_xhci *omap) 50 { 51 usb_phy_power(0); 52 } 53 54 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) 55 { 56 struct omap_xhci *ctx = &omap; 57 int ret = 0; 58 59 ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE; 60 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); 61 ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE; 62 ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE; 63 64 ret = board_usb_init(index, USB_INIT_HOST); 65 if (ret != 0) { 66 puts("Failed to initialize board for USB\n"); 67 return ret; 68 } 69 70 ret = omap_xhci_core_init(ctx); 71 if (ret < 0) { 72 puts("Failed to initialize xhci\n"); 73 return ret; 74 } 75 76 *hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE); 77 *hcor = (struct xhci_hcor *)((uint32_t) *hccr 78 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 79 80 debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n", 81 (uint32_t)*hccr, (uint32_t)*hcor, 82 (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 83 84 return ret; 85 } 86 87 void xhci_hcd_stop(int index) 88 { 89 struct omap_xhci *ctx = &omap; 90 91 omap_xhci_core_exit(ctx); 92 board_usb_cleanup(index, USB_INIT_HOST); 93 } 94