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https://github.com/AsahiLinux/u-boot
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9cadf05958
Base driver for Broadcom xHCI controllers Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Signed-off-by: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Broadcom.
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*/
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#include <common.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 <asm/io.h>
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#include <usb/xhci.h>
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#define DRD2U3H_XHC_REGS_AXIWRA 0xC08
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#define DRD2U3H_XHC_REGS_AXIRDA 0xC0C
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#define USBAXI_CACHE 0xF
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#define USBAXI_PROT 0x8
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#define USBAXI_SA_MASK 0x1FF
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#define USBAXI_UA_MASK (0x1FF << 16)
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#define USBAXI_SA_VAL ((USBAXI_CACHE << 4) | USBAXI_PROT)
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#define USBAXI_UA_VAL (USBAXI_SA_VAL << 16)
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#define USBAXI_SA_UA_MASK (USBAXI_UA_MASK | USBAXI_SA_MASK)
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#define USBAXI_SA_UA_VAL (USBAXI_UA_VAL | USBAXI_SA_VAL)
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struct brcm_xhci_platdata {
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unsigned int arcache;
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unsigned int awcache;
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void __iomem *hc_base;
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};
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static int xhci_brcm_probe(struct udevice *dev)
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{
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struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
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struct xhci_hcor *hcor;
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struct xhci_hccr *hcd;
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int len, ret = 0;
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if (!plat) {
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dev_err(dev, "Can't get xHCI Plat data\n");
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return -ENOMEM;
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}
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hcd = dev_read_addr_ptr(dev);
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if (!hcd) {
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dev_err(dev, "Can't get the xHCI register base address\n");
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return -ENXIO;
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}
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plat->hc_base = hcd;
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len = HC_LENGTH(xhci_readl(&hcd->cr_capbase));
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hcor = (struct xhci_hcor *)(plat->hc_base + len);
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/* Save the default values of AXI read and write attributes */
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plat->awcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
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plat->arcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
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/* Enable AXI write attributes */
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clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA,
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USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
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/* Enable AXI read attributes */
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clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA,
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USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
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ret = xhci_register(dev, hcd, hcor);
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if (ret)
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dev_err(dev, "Failed to register xHCI\n");
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return ret;
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}
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static int xhci_brcm_deregister(struct udevice *dev)
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{
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struct brcm_xhci_platdata *plat = dev_get_platdata(dev);
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/* Restore the default values for AXI read and write attributes */
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writel(plat->awcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
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writel(plat->arcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
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return xhci_deregister(dev);
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}
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static const struct udevice_id xhci_brcm_ids[] = {
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{ .compatible = "brcm,generic-xhci" },
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{ }
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};
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U_BOOT_DRIVER(usb_xhci) = {
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.name = "xhci_brcm",
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.id = UCLASS_USB,
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.probe = xhci_brcm_probe,
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.remove = xhci_brcm_deregister,
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.ops = &xhci_usb_ops,
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.of_match = xhci_brcm_ids,
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.platdata_auto_alloc_size = sizeof(struct brcm_xhci_platdata),
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.priv_auto_alloc_size = sizeof(struct xhci_ctrl),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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