1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
5 * Renesas RCar USB HOST xHCI Controller
16 #include "xhci-rcar-r8a779x_usb3_v3.h"
19 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
20 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
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)
28 struct rcar_xhci_platdata {
34 * Contains pointers to register base addresses
35 * for the usb controller.
38 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
39 struct usb_platdata usb_plat;
40 struct xhci_hccr *hcd;
43 static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data,
44 const size_t fw_array_size)
46 void __iomem *regs = (void __iomem *)ctx->hcd;
49 /* Download R-Car USB3.0 firmware */
50 setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
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);
57 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
58 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
64 clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
66 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
67 RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
73 static int xhci_rcar_probe(struct udevice *dev)
75 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
76 struct rcar_xhci *ctx = dev_get_priv(dev);
77 struct xhci_hcor *hcor;
80 ret = clk_get_by_index(dev, 0, &plat->clk);
82 dev_err(dev, "Failed to get USB3 clock\n");
86 ret = clk_enable(&plat->clk);
88 dev_err(dev, "Failed to enable USB3 clock\n");
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);
96 ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3,
97 ARRAY_SIZE(firmware_r8a779x_usb3_v3));
99 dev_err(dev, "Failed to download firmware\n");
103 ret = xhci_register(dev, ctx->hcd, hcor);
105 dev_err(dev, "Failed to register xHCI\n");
112 clk_disable(&plat->clk);
114 clk_free(&plat->clk);
118 static int xhci_rcar_deregister(struct udevice *dev)
121 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
123 ret = xhci_deregister(dev);
125 clk_disable(&plat->clk);
126 clk_free(&plat->clk);
131 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
133 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
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");
144 static const struct udevice_id xhci_rcar_ids[] = {
145 { .compatible = "renesas,xhci-r8a7795" },
146 { .compatible = "renesas,xhci-r8a7796" },
147 { .compatible = "renesas,xhci-r8a77965" },
151 U_BOOT_DRIVER(usb_xhci) = {
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,