1 /* 2 * Copyright 2015 Freescale Semiconductor, Inc. 3 * 4 * FSL USB HOST xHCI Controller 5 * 6 * Author: Ramneek Mehresh<ramneek.mehresh@freescale.com> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <usb.h> 13 #include <asm-generic/errno.h> 14 #include <linux/compat.h> 15 #include <linux/usb/xhci-fsl.h> 16 #include <linux/usb/dwc3.h> 17 #include "xhci.h" 18 19 /* Declare global data pointer */ 20 DECLARE_GLOBAL_DATA_PTR; 21 22 static struct fsl_xhci fsl_xhci; 23 unsigned long ctr_addr[] = FSL_USB_XHCI_ADDR; 24 25 __weak int __board_usb_init(int index, enum usb_init_type init) 26 { 27 return 0; 28 } 29 30 static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci) 31 { 32 int ret = 0; 33 34 ret = dwc3_core_init(fsl_xhci->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(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); 42 43 /* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */ 44 dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT); 45 46 return ret; 47 } 48 49 static int fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci) 50 { 51 /* 52 * Currently fsl socs do not support PHY shutdown from 53 * sw. But this support may be added in future socs. 54 */ 55 return 0; 56 } 57 58 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) 59 { 60 struct fsl_xhci *ctx = &fsl_xhci; 61 int ret = 0; 62 63 ctx->hcd = (struct xhci_hccr *)ctr_addr[index]; 64 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); 65 66 ret = board_usb_init(index, USB_INIT_HOST); 67 if (ret != 0) { 68 puts("Failed to initialize board for USB\n"); 69 return ret; 70 } 71 72 ret = fsl_xhci_core_init(ctx); 73 if (ret < 0) { 74 puts("Failed to initialize xhci\n"); 75 return ret; 76 } 77 78 *hccr = (struct xhci_hccr *)ctx->hcd; 79 *hcor = (struct xhci_hcor *)((uintptr_t) *hccr 80 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 81 82 debug("fsl-xhci: init hccr %lx and hcor %lx hc_length %lx\n", 83 (uintptr_t)*hccr, (uintptr_t)*hcor, 84 (uintptr_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 85 86 return ret; 87 } 88 89 void xhci_hcd_stop(int index) 90 { 91 struct fsl_xhci *ctx = &fsl_xhci; 92 93 fsl_xhci_core_exit(ctx); 94 } 95