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 omap_xhci_board_usb_init(int index, enum usb_init_type init) 31 { 32 enable_usb_clocks(index); 33 return 0; 34 } 35 36 int board_usb_init(int index, enum usb_init_type init) 37 { 38 return omap_xhci_board_usb_init(index, init); 39 } 40 41 __weak int omap_xhci_board_usb_cleanup(int index, enum usb_init_type init) 42 { 43 disable_usb_clocks(index); 44 return 0; 45 } 46 47 int board_usb_cleanup(int index, enum usb_init_type init) 48 { 49 return omap_xhci_board_usb_cleanup(index, init); 50 } 51 52 static int omap_xhci_core_init(struct omap_xhci *omap) 53 { 54 int ret = 0; 55 56 usb_phy_power(1); 57 omap_enable_phy(omap); 58 59 ret = dwc3_core_init(omap->dwc3_reg); 60 if (ret) { 61 debug("%s:failed to initialize core\n", __func__); 62 return ret; 63 } 64 65 /* We are hard-coding DWC3 core to Host Mode */ 66 dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); 67 68 return ret; 69 } 70 71 static void omap_xhci_core_exit(struct omap_xhci *omap) 72 { 73 usb_phy_power(0); 74 } 75 76 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) 77 { 78 struct omap_xhci *ctx = &omap; 79 int ret = 0; 80 81 ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE; 82 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); 83 ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE; 84 ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE; 85 86 ret = board_usb_init(index, USB_INIT_HOST); 87 if (ret != 0) { 88 puts("Failed to initialize board for USB\n"); 89 return ret; 90 } 91 92 ret = omap_xhci_core_init(ctx); 93 if (ret < 0) { 94 puts("Failed to initialize xhci\n"); 95 return ret; 96 } 97 98 *hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE); 99 *hcor = (struct xhci_hcor *)((uint32_t) *hccr 100 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 101 102 debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n", 103 (uint32_t)*hccr, (uint32_t)*hcor, 104 (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 105 106 return ret; 107 } 108 109 void xhci_hcd_stop(int index) 110 { 111 struct omap_xhci *ctx = &omap; 112 113 omap_xhci_core_exit(ctx); 114 board_usb_cleanup(index, USB_INIT_HOST); 115 } 116