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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2014 Marvell
- * Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
- */
- #include <linux/io.h>
- #include <linux/mbus.h>
- #include <linux/of.h>
- #include <linux/platform_device.h>
- #include <linux/phy/phy.h>
- #include <linux/usb.h>
- #include <linux/usb/hcd.h>
- #include "xhci-mvebu.h"
- #include "xhci.h"
- #define USB3_MAX_WINDOWS 4
- #define USB3_WIN_CTRL(w) (0x0 + ((w) * 8))
- #define USB3_WIN_BASE(w) (0x4 + ((w) * 8))
- static void xhci_mvebu_mbus_config(void __iomem *base,
- const struct mbus_dram_target_info *dram)
- {
- int win;
- /* Clear all existing windows */
- for (win = 0; win < USB3_MAX_WINDOWS; win++) {
- writel(0, base + USB3_WIN_CTRL(win));
- writel(0, base + USB3_WIN_BASE(win));
- }
- /* Program each DRAM CS in a seperate window */
- for (win = 0; win < dram->num_cs; win++) {
- const struct mbus_dram_window *cs = dram->cs + win;
- writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
- (dram->mbus_dram_target_id << 4) | 1,
- base + USB3_WIN_CTRL(win));
- writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win));
- }
- }
- int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
- {
- struct device *dev = hcd->self.controller;
- struct platform_device *pdev = to_platform_device(dev);
- struct resource *res;
- void __iomem *base;
- const struct mbus_dram_target_info *dram;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res)
- return -ENODEV;
- /*
- * We don't use devm_ioremap() because this mapping should
- * only exists for the duration of this probe function.
- */
- base = ioremap(res->start, resource_size(res));
- if (!base)
- return -ENODEV;
- dram = mv_mbus_dram_info();
- xhci_mvebu_mbus_config(base, dram);
- /*
- * This memory area was only needed to configure the MBus
- * windows, and is therefore no longer useful.
- */
- iounmap(base);
- return 0;
- }
- int xhci_mvebu_a3700_plat_setup(struct usb_hcd *hcd)
- {
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct device *dev = hcd->self.controller;
- struct phy *phy;
- int ret;
- /* Old bindings miss the PHY handle */
- phy = of_phy_get(dev->of_node, "usb3-phy");
- if (IS_ERR(phy) && PTR_ERR(phy) == -EPROBE_DEFER)
- return -EPROBE_DEFER;
- else if (IS_ERR(phy))
- goto phy_out;
- ret = phy_init(phy);
- if (ret)
- goto phy_put;
- ret = phy_set_mode(phy, PHY_MODE_USB_HOST_SS);
- if (ret)
- goto phy_exit;
- ret = phy_power_on(phy);
- if (ret == -EOPNOTSUPP) {
- /* Skip initializatin of XHCI PHY when it is unsupported by firmware */
- dev_warn(dev, "PHY unsupported by firmware\n");
- xhci->quirks |= XHCI_SKIP_PHY_INIT;
- }
- if (ret)
- goto phy_exit;
- phy_power_off(phy);
- phy_exit:
- phy_exit(phy);
- phy_put:
- of_phy_put(phy);
- phy_out:
- return 0;
- }
- int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd)
- {
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- /* Without reset on resume, the HC won't work at all */
- xhci->quirks |= XHCI_RESET_ON_RESUME;
- return 0;
- }
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