1 /* 2 * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com> 3 * 4 * Renesas RCar USB HOST xHCI Controller 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <clk.h> 11 #include <dm.h> 12 #include <fdtdec.h> 13 #include <usb.h> 14 #include <wait_bit.h> 15 16 #include <usb/xhci.h> 17 #include "xhci-rcar-r8a779x_usb3_v3.h" 18 19 /* Register Offset */ 20 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */ 21 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */ 22 23 /* Register Settings */ 24 /* FW Download Control & Status */ 25 #define RCAR_USB3_DL_CTRL_ENABLE BIT(0) 26 #define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4) 27 #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8) 28 29 struct rcar_xhci_platdata { 30 fdt_addr_t hcd_base; 31 struct clk clk; 32 }; 33 34 /** 35 * Contains pointers to register base addresses 36 * for the usb controller. 37 */ 38 struct rcar_xhci { 39 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ 40 struct usb_platdata usb_plat; 41 struct xhci_hccr *hcd; 42 }; 43 44 static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data, 45 const size_t fw_array_size) 46 { 47 void __iomem *regs = (void __iomem *)ctx->hcd; 48 int i, ret; 49 50 /* Download R-Car USB3.0 firmware */ 51 setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); 52 53 for (i = 0; i < fw_array_size; i++) { 54 writel(fw_data[i], regs + RCAR_USB3_FW_DATA0); 55 setbits_le32(regs + RCAR_USB3_DL_CTRL, 56 RCAR_USB3_DL_CTRL_FW_SET_DATA0); 57 58 <<<<<<< HEAD 59 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, 60 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false, 61 10, false); 62 ======= 63 ret = wait_for_bit("xhci-rcar", regs + RCAR_USB3_DL_CTRL, 64 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false, 65 10, false); 66 >>>>>>> e1cc60c... usb: xhci: Add Renesas R-Car xHCI driver 67 if (ret) 68 break; 69 } 70 71 clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); 72 73 <<<<<<< HEAD 74 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, 75 RCAR_USB3_DL_CTRL_FW_SUCCESS, true, 76 10, false); 77 ======= 78 ret = wait_for_bit("xhci-rcar", regs + RCAR_USB3_DL_CTRL, 79 RCAR_USB3_DL_CTRL_FW_SUCCESS, true, 80 10, false); 81 >>>>>>> e1cc60c... usb: xhci: Add Renesas R-Car xHCI driver 82 83 return ret; 84 } 85 86 static int xhci_rcar_probe(struct udevice *dev) 87 { 88 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 89 struct rcar_xhci *ctx = dev_get_priv(dev); 90 struct xhci_hcor *hcor; 91 int len, ret; 92 93 ret = clk_get_by_index(dev, 0, &plat->clk); 94 if (ret < 0) { 95 dev_err(dev, "Failed to get USB3 clock\n"); 96 return ret; 97 } 98 99 ret = clk_enable(&plat->clk); 100 if (ret) { 101 dev_err(dev, "Failed to enable USB3 clock\n"); 102 goto err_clk; 103 } 104 105 ctx->hcd = (struct xhci_hccr *)plat->hcd_base; 106 len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)); 107 hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len); 108 109 ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3, 110 ARRAY_SIZE(firmware_r8a779x_usb3_v3)); 111 if (ret) { 112 dev_err(dev, "Failed to download firmware\n"); 113 goto err_fw; 114 } 115 116 ret = xhci_register(dev, ctx->hcd, hcor); 117 if (ret) { 118 dev_err(dev, "Failed to register xHCI\n"); 119 goto err_fw; 120 } 121 122 return 0; 123 124 err_fw: 125 clk_disable(&plat->clk); 126 err_clk: 127 clk_free(&plat->clk); 128 return ret; 129 } 130 131 static int xhci_rcar_deregister(struct udevice *dev) 132 { 133 int ret; 134 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 135 136 ret = xhci_deregister(dev); 137 138 clk_disable(&plat->clk); 139 clk_free(&plat->clk); 140 141 return ret; 142 } 143 144 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev) 145 { 146 struct rcar_xhci_platdata *plat = dev_get_platdata(dev); 147 148 plat->hcd_base = devfdt_get_addr(dev); 149 if (plat->hcd_base == FDT_ADDR_T_NONE) { 150 debug("Can't get the XHCI register base address\n"); 151 return -ENXIO; 152 } 153 154 return 0; 155 } 156 157 static const struct udevice_id xhci_rcar_ids[] = { 158 { .compatible = "renesas,xhci-r8a7795" }, 159 { .compatible = "renesas,xhci-r8a7796" }, 160 { .compatible = "renesas,xhci-r8a77965" }, 161 { } 162 }; 163 164 U_BOOT_DRIVER(usb_xhci) = { 165 .name = "xhci_rcar", 166 .id = UCLASS_USB, 167 .probe = xhci_rcar_probe, 168 .remove = xhci_rcar_deregister, 169 .ops = &xhci_usb_ops, 170 .of_match = xhci_rcar_ids, 171 .ofdata_to_platdata = xhci_rcar_ofdata_to_platdata, 172 .platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata), 173 .priv_auto_alloc_size = sizeof(struct rcar_xhci), 174 .flags = DM_FLAG_ALLOC_PRIV_DMA, 175 }; 176