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 __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 } 101