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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_alloc_size = sizeof(struct brcm_xhci_platdata),
- .priv_auto_alloc_size = sizeof(struct xhci_ctrl),
- .flags = DM_FLAG_ALLOC_PRIV_DMA,
- };
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