mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
160 lines
3.7 KiB
C
160 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
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*
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* Renesas RCar USB HOST xHCI Controller
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <usb.h>
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#include <wait_bit.h>
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#include "xhci.h"
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#include "xhci-rcar-r8a779x_usb3_v3.h"
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/* Register Offset */
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#define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
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#define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
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/* Register Settings */
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/* FW Download Control & Status */
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#define RCAR_USB3_DL_CTRL_ENABLE BIT(0)
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#define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4)
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#define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8)
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struct rcar_xhci_platdata {
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fdt_addr_t hcd_base;
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struct clk clk;
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};
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/**
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* Contains pointers to register base addresses
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* for the usb controller.
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*/
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struct rcar_xhci {
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struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
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struct usb_platdata usb_plat;
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struct xhci_hccr *hcd;
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};
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static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data,
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const size_t fw_array_size)
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{
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void __iomem *regs = (void __iomem *)ctx->hcd;
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int i, ret;
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/* Download R-Car USB3.0 firmware */
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setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
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for (i = 0; i < fw_array_size; i++) {
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writel(fw_data[i], regs + RCAR_USB3_FW_DATA0);
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setbits_le32(regs + RCAR_USB3_DL_CTRL,
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RCAR_USB3_DL_CTRL_FW_SET_DATA0);
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ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
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RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
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10, false);
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if (ret)
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break;
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}
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clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
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ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
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RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
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10, false);
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return ret;
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}
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static int xhci_rcar_probe(struct udevice *dev)
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{
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struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
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struct rcar_xhci *ctx = dev_get_priv(dev);
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struct xhci_hcor *hcor;
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int len, ret;
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ret = clk_get_by_index(dev, 0, &plat->clk);
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if (ret < 0) {
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dev_err(dev, "Failed to get USB3 clock\n");
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return ret;
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}
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ret = clk_enable(&plat->clk);
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if (ret) {
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dev_err(dev, "Failed to enable USB3 clock\n");
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goto err_clk;
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}
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ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
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len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
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hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
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ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3,
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ARRAY_SIZE(firmware_r8a779x_usb3_v3));
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if (ret) {
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dev_err(dev, "Failed to download firmware\n");
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goto err_fw;
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}
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ret = xhci_register(dev, ctx->hcd, hcor);
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if (ret) {
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dev_err(dev, "Failed to register xHCI\n");
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goto err_fw;
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}
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return 0;
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err_fw:
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clk_disable(&plat->clk);
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err_clk:
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clk_free(&plat->clk);
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return ret;
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}
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static int xhci_rcar_deregister(struct udevice *dev)
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{
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struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
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clk_disable(&plat->clk);
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clk_free(&plat->clk);
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return xhci_deregister(dev);
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}
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static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
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{
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struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
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plat->hcd_base = devfdt_get_addr(dev);
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if (plat->hcd_base == FDT_ADDR_T_NONE) {
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debug("Can't get the XHCI register base address\n");
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return -ENXIO;
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}
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return 0;
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}
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static const struct udevice_id xhci_rcar_ids[] = {
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{ .compatible = "renesas,xhci-r8a7795" },
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{ .compatible = "renesas,xhci-r8a7796" },
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{ .compatible = "renesas,xhci-r8a77965" },
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{ }
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};
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U_BOOT_DRIVER(usb_xhci) = {
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.name = "xhci_rcar",
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.id = UCLASS_USB,
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.probe = xhci_rcar_probe,
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.remove = xhci_rcar_deregister,
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.ops = &xhci_usb_ops,
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.of_match = xhci_rcar_ids,
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.ofdata_to_platdata = xhci_rcar_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata),
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.priv_auto_alloc_size = sizeof(struct rcar_xhci),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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