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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Broadcom.
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <usb.h>
#include <asm/io.h>
#include <usb/xhci.h>
#define DRD2U3H_XHC_REGS_AXIWRA 0xC08
#define DRD2U3H_XHC_REGS_AXIRDA 0xC0C
#define USBAXI_CACHE 0xF
#define USBAXI_PROT 0x8
#define USBAXI_SA_MASK 0x1FF
#define USBAXI_UA_MASK (0x1FF << 16)
#define USBAXI_SA_VAL ((USBAXI_CACHE << 4) | USBAXI_PROT)
#define USBAXI_UA_VAL (USBAXI_SA_VAL << 16)
#define USBAXI_SA_UA_MASK (USBAXI_UA_MASK | USBAXI_SA_MASK)
#define USBAXI_SA_UA_VAL (USBAXI_UA_VAL | USBAXI_SA_VAL)
struct brcm_xhci_platdata {
unsigned int arcache;
unsigned int awcache;
void __iomem *hc_base;
};
static int xhci_brcm_probe(struct udevice *dev)
{
struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
struct xhci_hcor *hcor;
struct xhci_hccr *hcd;
int len, ret = 0;
if (!plat) {
dev_err(dev, "Can't get xHCI Plat data\n");
return -ENOMEM;
}
hcd = dev_read_addr_ptr(dev);
if (!hcd) {
dev_err(dev, "Can't get the xHCI register base address\n");
return -ENXIO;
}
plat->hc_base = hcd;
len = HC_LENGTH(xhci_readl(&hcd->cr_capbase));
hcor = (struct xhci_hcor *)(plat->hc_base + len);
/* Save the default values of AXI read and write attributes */
plat->awcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
plat->arcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
/* Enable AXI write attributes */
clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA,
USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
/* Enable AXI read attributes */
clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA,
USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
ret = xhci_register(dev, hcd, hcor);
if (ret)
dev_err(dev, "Failed to register xHCI\n");
return ret;
}
static int xhci_brcm_deregister(struct udevice *dev)
{
struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
/* Restore the default values for AXI read and write attributes */
writel(plat->awcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
writel(plat->arcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
return xhci_deregister(dev);
}
static const struct udevice_id xhci_brcm_ids[] = {
{ .compatible = "brcm,generic-xhci" },
{ }
};
U_BOOT_DRIVER(usb_xhci) = {
.name = "xhci_brcm",
.id = UCLASS_USB,
.probe = xhci_brcm_probe,
.remove = xhci_brcm_deregister,
.ops = &xhci_usb_ops,
.of_match = xhci_brcm_ids,
.platdata_auto = sizeof(struct brcm_xhci_platdata),
.priv_auto = sizeof(struct xhci_ctrl),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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