1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2017 Marek Vasut <marek.vasut (at) gmail.com> 4 * 5 * Renesas RCar USB HOST xHCI Controller 6 */ 7 8 #include <common.h> 9 #include <clk.h> 10 #include <dm.h> 11 #include <fdtdec.h> 12 #include <usb.h> 13 #include <wait_bit.h> 14 15 #include "xhci.h" 16 #include "xhci-rcar-r8a779x_usb3_v3.h" 17 18 /* Register Offset */ 19 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */ 20 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */ 21 22 /* Register Settings */ 23 /* FW Download Control & Status */ 24 #define RCAR_USB3_DL_CTRL_ENABLE BIT(0) 25 #define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4) 26 #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8) 27 28 struct rcar_xhci_platdata { 29 fdt_addr_t hcd_base; 30 struct clk clk; 31 }; 32 33 /** 34 * Contains pointers to register base addresses 35 * for the usb controller. 36 */ 37 struct rcar_xhci { 38 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ 39 struct usb_platdata usb_plat; 40 struct xhci_hccr *hcd; 41 }; 42 43 static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data, 44 const size_t fw_array_size) 45 { 46 void __iomem *regs = (void __iomem *)ctx->hcd; 47 int i, ret; 48 49 /* Download R-Car USB3.0 firmware */ 50 setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); 51 52 for (i = 0; i < fw_array_size; i++) { 53 writel(fw_data[i], regs + RCAR_USB3_FW_DATA0); 54 setbits_le32(regs + RCAR_USB3_DL_CTRL, 55 RCAR_USB3_DL_CTRL_FW_SET_DATA0); 56 57 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, 58 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false, 59 10, false); 60 if (ret) 61 break; 62 } 63 64 clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); 65 66 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, 67 RCAR_USB3_DL_CTRL_FW_SUCCESS, true, 68 10, false); 69 70 return ret; 71 } 72 73 static int xhci_rcar_probe(struct udevice *dev) 74 { 75 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 76 struct rcar_xhci *ctx = dev_get_priv(dev); 77 struct xhci_hcor *hcor; 78 int len, ret; 79 80 ret = clk_get_by_index(dev, 0, &plat->clk); 81 if (ret < 0) { 82 dev_err(dev, "Failed to get USB3 clock\n"); 83 return ret; 84 } 85 86 ret = clk_enable(&plat->clk); 87 if (ret) { 88 dev_err(dev, "Failed to enable USB3 clock\n"); 89 goto err_clk; 90 } 91 92 ctx->hcd = (struct xhci_hccr *)plat->hcd_base; 93 len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)); 94 hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len); 95 96 ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3, 97 ARRAY_SIZE(firmware_r8a779x_usb3_v3)); 98 if (ret) { 99 dev_err(dev, "Failed to download firmware\n"); 100 goto err_fw; 101 } 102 103 ret = xhci_register(dev, ctx->hcd, hcor); 104 if (ret) { 105 dev_err(dev, "Failed to register xHCI\n"); 106 goto err_fw; 107 } 108 109 return 0; 110 111 err_fw: 112 clk_disable(&plat->clk); 113 err_clk: 114 clk_free(&plat->clk); 115 return ret; 116 } 117 118 static int xhci_rcar_deregister(struct udevice *dev) 119 { 120 int ret; 121 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 122 123 ret = xhci_deregister(dev); 124 125 clk_disable(&plat->clk); 126 clk_free(&plat->clk); 127 128 return ret; 129 } 130 131 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev) 132 { 133 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 134 135 plat->hcd_base = devfdt_get_addr(dev); 136 if (plat->hcd_base == FDT_ADDR_T_NONE) { 137 debug("Can't get the XHCI register base address\n"); 138 return -ENXIO; 139 } 140 141 return 0; 142 } 143 144 static const struct udevice_id xhci_rcar_ids[] = { 145 { .compatible = "renesas,xhci-r8a7795" }, 146 { .compatible = "renesas,xhci-r8a7796" }, 147 { .compatible = "renesas,xhci-r8a77965" }, 148 { } 149 }; 150 151 U_BOOT_DRIVER(usb_xhci) = { 152 .name = "xhci_rcar", 153 .id = UCLASS_USB, 154 .probe = xhci_rcar_probe, 155 .remove = xhci_rcar_deregister, 156 .ops = &xhci_usb_ops, 157 .of_match = xhci_rcar_ids, 158 .ofdata_to_platdata = xhci_rcar_ofdata_to_platdata, 159 .platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata), 160 .priv_auto_alloc_size = sizeof(struct rcar_xhci), 161 .flags = DM_FLAG_ALLOC_PRIV_DMA, 162 }; 163
