2 * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
4 * Renesas RCar USB HOST xHCI Controller
6 * SPDX-License-Identifier: GPL-2.0+
17 #include "xhci-rcar-r8a779x_usb3_v3.h"
20 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
21 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
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)
29 struct rcar_xhci_platdata {
35 * Contains pointers to register base addresses
36 * for the usb controller.
39 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
40 struct usb_platdata usb_plat;
41 struct xhci_hccr *hcd;
44 static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data,
45 const size_t fw_array_size)
47 void __iomem *regs = (void __iomem *)ctx->hcd;
50 /* Download R-Car USB3.0 firmware */
51 setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
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);
58 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
59 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
65 clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
67 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
68 RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
74 static int xhci_rcar_probe(struct udevice *dev)
76 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
77 struct rcar_xhci *ctx = dev_get_priv(dev);
78 struct xhci_hcor *hcor;
81 ret = clk_get_by_index(dev, 0, &plat->clk);
83 dev_err(dev, "Failed to get USB3 clock\n");
87 ret = clk_enable(&plat->clk);
89 dev_err(dev, "Failed to enable USB3 clock\n");
93 ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
94 len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
95 hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
97 ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3,
98 ARRAY_SIZE(firmware_r8a779x_usb3_v3));
100 dev_err(dev, "Failed to download firmware\n");
104 ret = xhci_register(dev, ctx->hcd, hcor);
106 dev_err(dev, "Failed to register xHCI\n");
113 clk_disable(&plat->clk);
115 clk_free(&plat->clk);
119 static int xhci_rcar_deregister(struct udevice *dev)
121 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
123 clk_disable(&plat->clk);
124 clk_free(&plat->clk);
126 return xhci_deregister(dev);
129 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
131 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
133 plat->hcd_base = devfdt_get_addr(dev);
134 if (plat->hcd_base == FDT_ADDR_T_NONE) {
135 debug("Can't get the XHCI register base address\n");
142 static const struct udevice_id xhci_rcar_ids[] = {
143 { .compatible = "renesas,xhci-r8a7795" },
144 { .compatible = "renesas,xhci-r8a7796" },
145 { .compatible = "renesas,xhci-r8a77965" },
149 U_BOOT_DRIVER(usb_xhci) = {
152 .probe = xhci_rcar_probe,
153 .remove = xhci_rcar_deregister,
154 .ops = &xhci_usb_ops,
155 .of_match = xhci_rcar_ids,
156 .ofdata_to_platdata = xhci_rcar_ofdata_to_platdata,
157 .platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata),
158 .priv_auto_alloc_size = sizeof(struct rcar_xhci),
159 .flags = DM_FLAG_ALLOC_PRIV_DMA,