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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
*
* Renesas RCar USB HOST xHCI Controller
*/
#include <common.h>
#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_platdata {
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_platdata 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_platdata *plat = dev_get_platdata(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");
goto err_clk;
}
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);
err_clk:
clk_free(&plat->clk);
return ret;
}
static int xhci_rcar_deregister(struct udevice *dev)
{
int ret;
struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
ret = xhci_deregister(dev);
clk_disable(&plat->clk);
clk_free(&plat->clk);
return ret;
}
static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
{
struct rcar_xhci_platdata *plat = dev_get_platdata(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,xhci-r8a7795" },
{ .compatible = "renesas,xhci-r8a7796" },
{ .compatible = "renesas,xhci-r8a77965" },
{ }
};
U_BOOT_DRIVER(usb_xhci) = {
.name = "xhci_rcar",
.id = UCLASS_USB,
.probe = xhci_rcar_probe,
.remove = xhci_rcar_deregister,
.ops = &xhci_usb_ops,
.of_match = xhci_rcar_ids,
.ofdata_to_platdata = xhci_rcar_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata),
.priv_auto_alloc_size = sizeof(struct rcar_xhci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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