163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
// 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 <usb.h>
|
|
#include <wait_bit.h>
|
|
|
|
#include "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 = devfdt_get_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,
|
|
};
|