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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com> * * Renesas R-Car USB HOST xHCI Controller */ #include <clk.h> #include <dm.h> #include <fdtdec.h> #include <log.h> #include <malloc.h> #include <usb.h> #include <wait_bit.h> #include <dm/device_compat.h> #include <linux/bitops.h> #include <usb/xhci.h> #include "xhci-rcar-r8a779x_usb3_v3.h" /* Register Offset */ #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */ #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */ /* Register Settings */ /* FW Download Control & Status */ #define RCAR_USB3_DL_CTRL_ENABLE BIT(0) #define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4) #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8) struct rcar_xhci_plat { fdt_addr_t hcd_base; struct clk clk; }; /** * Contains pointers to register base addresses * for the usb controller. */ struct rcar_xhci { struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ struct usb_plat usb_plat; struct xhci_hccr *hcd; }; static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data, const size_t fw_array_size) { void __iomem *regs = (void __iomem *)ctx->hcd; int i, ret; /* Download R-Car USB3.0 firmware */ setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); for (i = 0; i < fw_array_size; i++) { writel(fw_data[i], regs + RCAR_USB3_FW_DATA0); setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_FW_SET_DATA0); ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_FW_SET_DATA0, false, 10, false); if (ret) break; } clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE); ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_FW_SUCCESS, true, 10, false); return ret; } static int xhci_rcar_probe(struct udevice *dev) { struct rcar_xhci_plat *plat = dev_get_plat(dev); struct rcar_xhci *ctx = dev_get_priv(dev); struct xhci_hcor *hcor; int len, ret; ret = clk_get_by_index(dev, 0, &plat->clk); if (ret < 0) { dev_err(dev, "Failed to get USB3 clock\n"); return ret; } ret = clk_enable(&plat->clk); if (ret) { dev_err(dev, "Failed to enable USB3 clock\n"); return ret; } ctx->hcd = (struct xhci_hccr *)plat->hcd_base; len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)); hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len); ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3, ARRAY_SIZE(firmware_r8a779x_usb3_v3)); if (ret) { dev_err(dev, "Failed to download firmware\n"); goto err_fw; } ret = xhci_register(dev, ctx->hcd, hcor); if (ret) { dev_err(dev, "Failed to register xHCI\n"); goto err_fw; } return 0; err_fw: clk_disable(&plat->clk); return ret; } static int xhci_rcar_deregister(struct udevice *dev) { int ret; struct rcar_xhci_plat *plat = dev_get_plat(dev); ret = xhci_deregister(dev); clk_disable(&plat->clk); return ret; } static int xhci_rcar_of_to_plat(struct udevice *dev) { struct rcar_xhci_plat *plat = dev_get_plat(dev); plat->hcd_base = dev_read_addr(dev); if (plat->hcd_base == FDT_ADDR_T_NONE) { debug("Can't get the XHCI register base address\n"); return -ENXIO; } return 0; } static const struct udevice_id xhci_rcar_ids[] = { { .compatible = "renesas,rcar-gen3-xhci" }, { .compatible = "renesas,xhci-r8a7795" }, { .compatible = "renesas,xhci-r8a7796" }, { .compatible = "renesas,xhci-r8a77965" }, { } }; U_BOOT_DRIVER(xhci_rcar) = { .name = "xhci_rcar", .id = UCLASS_USB, .probe = xhci_rcar_probe, .remove = xhci_rcar_deregister, .ops = &xhci_usb_ops, .of_match = xhci_rcar_ids, .of_to_plat = xhci_rcar_of_to_plat, .plat_auto = sizeof(struct rcar_xhci_plat), .priv_auto = sizeof(struct rcar_xhci), .flags = DM_FLAG_ALLOC_PRIV_DMA, }; |