1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2015,2016 Freescale Semiconductor, Inc. 4 * 5 * FSL USB HOST xHCI Controller 6 * 7 * Author: Ramneek Mehresh<ramneek.mehresh@freescale.com> 8 */ 9 10 #include <common.h> 11 #include <usb.h> 12 #include <linux/errno.h> 13 #include <linux/compat.h> 14 #include <linux/usb/xhci-fsl.h> 15 #include <linux/usb/dwc3.h> 16 #include "xhci.h" 17 #include <fsl_errata.h> 18 #include <fsl_usb.h> 19 #include <dm.h> 20 21 /* Declare global data pointer */ 22 #if !CONFIG_IS_ENABLED(DM_USB) 23 static struct fsl_xhci fsl_xhci; 24 unsigned long ctr_addr[] = FSL_USB_XHCI_ADDR; 25 #else 26 struct xhci_fsl_priv { 27 struct xhci_ctrl xhci; 28 fdt_addr_t hcd_base; 29 struct fsl_xhci ctx; 30 }; 31 #endif 32 33 __weak int __board_usb_init(int index, enum usb_init_type init) 34 { 35 return 0; 36 } 37 38 static int erratum_a008751(void) 39 { 40 #if defined(CONFIG_TARGET_LS2080AQDS) || defined(CONFIG_TARGET_LS2080ARDB) ||\ 41 defined(CONFIG_TARGET_LS2080AQDS) 42 u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE; 43 writel(SCFG_USB3PRM1CR_INIT, scfg + SCFG_USB3PRM1CR / 4); 44 return 0; 45 #endif 46 return 1; 47 } 48 49 static void fsl_apply_xhci_errata(void) 50 { 51 int ret; 52 if (has_erratum_a008751()) { 53 ret = erratum_a008751(); 54 if (ret != 0) 55 puts("Failed to apply erratum a008751\n"); 56 } 57 } 58 59 static void fsl_xhci_set_beat_burst_length(struct dwc3 *dwc3_reg) 60 { 61 clrsetbits_le32(&dwc3_reg->g_sbuscfg0, USB3_ENABLE_BEAT_BURST_MASK, 62 USB3_ENABLE_BEAT_BURST); 63 setbits_le32(&dwc3_reg->g_sbuscfg1, USB3_SET_BEAT_BURST_LIMIT); 64 } 65 66 static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci) 67 { 68 int ret = 0; 69 70 ret = dwc3_core_init(fsl_xhci->dwc3_reg); 71 if (ret) { 72 debug("%s:failed to initialize core\n", __func__); 73 return ret; 74 } 75 76 /* We are hard-coding DWC3 core to Host Mode */ 77 dwc3_set_mode(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); 78 79 /* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */ 80 dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT); 81 82 /* Change beat burst and outstanding pipelined transfers requests */ 83 fsl_xhci_set_beat_burst_length(fsl_xhci->dwc3_reg); 84 85 /* 86 * A-010151: The dwc3 phy TSMC 28-nm HPM 0.9/1.8 V does not 87 * reliably support Rx Detect in P3 mode(P3 is the default 88 * setting). Therefore, some USB3.0 devices may not be detected 89 * reliably in Super Speed mode. So, USB controller to configure 90 * USB in P2 mode whenever the Receive Detect feature is required. 91 * whenever the Receive Detect feature is required. 92 */ 93 if (has_erratum_a010151()) 94 clrsetbits_le32(&fsl_xhci->dwc3_reg->g_usb3pipectl[0], 95 DWC3_GUSB3PIPECTL_DISRXDETP3, 96 DWC3_GUSB3PIPECTL_DISRXDETP3); 97 98 return ret; 99 } 100 101 static int fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci) 102 { 103 /* 104 * Currently fsl socs do not support PHY shutdown from 105 * sw. But this support may be added in future socs. 106 */ 107 return 0; 108 } 109 110 #if CONFIG_IS_ENABLED(DM_USB) 111 static int xhci_fsl_probe(struct udevice *dev) 112 { 113 struct xhci_fsl_priv *priv = dev_get_priv(dev); 114 struct xhci_hccr *hccr; 115 struct xhci_hcor *hcor; 116 117 int ret = 0; 118 119 /* 120 * Get the base address for XHCI controller from the device node 121 */ 122 priv->hcd_base = devfdt_get_addr(dev); 123 if (priv->hcd_base == FDT_ADDR_T_NONE) { 124 debug("Can't get the XHCI register base address\n"); 125 return -ENXIO; 126 } 127 priv->ctx.hcd = (struct xhci_hccr *)priv->hcd_base; 128 priv->ctx.dwc3_reg = (struct dwc3 *)((char *)(priv->hcd_base) + 129 DWC3_REG_OFFSET); 130 131 fsl_apply_xhci_errata(); 132 133 ret = fsl_xhci_core_init(&priv->ctx); 134 if (ret < 0) { 135 puts("Failed to initialize xhci\n"); 136 return ret; 137 } 138 139 hccr = (struct xhci_hccr *)(priv->ctx.hcd); 140 hcor = (struct xhci_hcor *)((uintptr_t) hccr 141 + HC_LENGTH(xhci_readl(&hccr->cr_capbase))); 142 143 debug("xhci-fsl: init hccr %lx and hcor %lx hc_length %lx\n", 144 (uintptr_t)hccr, (uintptr_t)hcor, 145 (uintptr_t)HC_LENGTH(xhci_readl(&hccr->cr_capbase))); 146 147 return xhci_register(dev, hccr, hcor); 148 } 149 150 static int xhci_fsl_remove(struct udevice *dev) 151 { 152 struct xhci_fsl_priv *priv = dev_get_priv(dev); 153 154 fsl_xhci_core_exit(&priv->ctx); 155 156 return xhci_deregister(dev); 157 } 158 159 static const struct udevice_id xhci_usb_ids[] = { 160 { .compatible = "fsl,layerscape-dwc3", }, 161 { } 162 }; 163 164 U_BOOT_DRIVER(xhci_fsl) = { 165 .name = "xhci_fsl", 166 .id = UCLASS_USB, 167 .of_match = xhci_usb_ids, 168 .probe = xhci_fsl_probe, 169 .remove = xhci_fsl_remove, 170 .ops = &xhci_usb_ops, 171 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 172 .priv_auto_alloc_size = sizeof(struct xhci_fsl_priv), 173 .flags = DM_FLAG_ALLOC_PRIV_DMA, 174 }; 175 #else 176 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) 177 { 178 struct fsl_xhci *ctx = &fsl_xhci; 179 int ret = 0; 180 181 ctx->hcd = (struct xhci_hccr *)ctr_addr[index]; 182 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); 183 184 ret = board_usb_init(index, USB_INIT_HOST); 185 if (ret != 0) { 186 puts("Failed to initialize board for USB\n"); 187 return ret; 188 } 189 190 fsl_apply_xhci_errata(); 191 192 ret = fsl_xhci_core_init(ctx); 193 if (ret < 0) { 194 puts("Failed to initialize xhci\n"); 195 return ret; 196 } 197 198 *hccr = (struct xhci_hccr *)ctx->hcd; 199 *hcor = (struct xhci_hcor *)((uintptr_t) *hccr 200 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 201 202 debug("fsl-xhci: init hccr %lx and hcor %lx hc_length %lx\n", 203 (uintptr_t)*hccr, (uintptr_t)*hcor, 204 (uintptr_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); 205 206 return ret; 207 } 208 209 void xhci_hcd_stop(int index) 210 { 211 struct fsl_xhci *ctx = &fsl_xhci; 212 213 fsl_xhci_core_exit(ctx); 214 } 215 #endif 216