| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) 2014 Marvell |
| 4 | * Author: Gregory CLEMENT <gregory.clement@free-electrons.com> |
| 5 | */ |
| 6 | |
| 7 | #include <linux/io.h> |
| 8 | #include <linux/mbus.h> |
| 9 | #include <linux/of.h> |
| 10 | #include <linux/platform_device.h> |
| 11 | #include <linux/phy/phy.h> |
| 12 | |
| 13 | #include <linux/usb.h> |
| 14 | #include <linux/usb/hcd.h> |
| 15 | |
| 16 | #include "xhci-mvebu.h" |
| 17 | #include "xhci.h" |
| 18 | |
| 19 | #define USB3_MAX_WINDOWS 4 |
| 20 | #define USB3_WIN_CTRL(w) (0x0 + ((w) * 8)) |
| 21 | #define USB3_WIN_BASE(w) (0x4 + ((w) * 8)) |
| 22 | |
| 23 | static void xhci_mvebu_mbus_config(void __iomem *base, |
| 24 | const struct mbus_dram_target_info *dram) |
| 25 | { |
| 26 | int win; |
| 27 | |
| 28 | /* Clear all existing windows */ |
| 29 | for (win = 0; win < USB3_MAX_WINDOWS; win++) { |
| 30 | writel(0, base + USB3_WIN_CTRL(win)); |
| 31 | writel(0, base + USB3_WIN_BASE(win)); |
| 32 | } |
| 33 | |
| 34 | /* Program each DRAM CS in a seperate window */ |
| 35 | for (win = 0; win < dram->num_cs; win++) { |
| 36 | const struct mbus_dram_window *cs = &dram->cs[win]; |
| 37 | |
| 38 | writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | |
| 39 | (dram->mbus_dram_target_id << 4) | 1, |
| 40 | base + USB3_WIN_CTRL(win)); |
| 41 | |
| 42 | writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win)); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd) |
| 47 | { |
| 48 | struct device *dev = hcd->self.controller; |
| 49 | struct platform_device *pdev = to_platform_device(dev); |
| 50 | struct resource *res; |
| 51 | void __iomem *base; |
| 52 | const struct mbus_dram_target_info *dram; |
| 53 | |
| 54 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 55 | if (!res) |
| 56 | return -ENODEV; |
| 57 | |
| 58 | /* |
| 59 | * We don't use devm_ioremap() because this mapping should |
| 60 | * only exists for the duration of this probe function. |
| 61 | */ |
| 62 | base = ioremap(res->start, resource_size(res)); |
| 63 | if (!base) |
| 64 | return -ENODEV; |
| 65 | |
| 66 | dram = mv_mbus_dram_info(); |
| 67 | xhci_mvebu_mbus_config(base, dram); |
| 68 | |
| 69 | /* |
| 70 | * This memory area was only needed to configure the MBus |
| 71 | * windows, and is therefore no longer useful. |
| 72 | */ |
| 73 | iounmap(base); |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | int xhci_mvebu_a3700_plat_setup(struct usb_hcd *hcd) |
| 79 | { |
| 80 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 81 | struct device *dev = hcd->self.controller; |
| 82 | struct phy *phy; |
| 83 | int ret; |
| 84 | |
| 85 | /* Old bindings miss the PHY handle */ |
| 86 | phy = of_phy_get(dev->of_node, "usb3-phy"); |
| 87 | if (IS_ERR(phy) && PTR_ERR(phy) == -EPROBE_DEFER) |
| 88 | return -EPROBE_DEFER; |
| 89 | else if (IS_ERR(phy)) |
| 90 | goto phy_out; |
| 91 | |
| 92 | ret = phy_init(phy); |
| 93 | if (ret) |
| 94 | goto phy_put; |
| 95 | |
| 96 | ret = phy_set_mode(phy, PHY_MODE_USB_HOST_SS); |
| 97 | if (ret) |
| 98 | goto phy_exit; |
| 99 | |
| 100 | ret = phy_power_on(phy); |
| 101 | if (ret == -EOPNOTSUPP) { |
| 102 | /* Skip initializatin of XHCI PHY when it is unsupported by firmware */ |
| 103 | dev_warn(dev, "PHY unsupported by firmware\n"); |
| 104 | xhci->quirks |= XHCI_SKIP_PHY_INIT; |
| 105 | } |
| 106 | if (ret) |
| 107 | goto phy_exit; |
| 108 | |
| 109 | phy_power_off(phy); |
| 110 | phy_exit: |
| 111 | phy_exit(phy); |
| 112 | phy_put: |
| 113 | phy_put(phy); |
| 114 | phy_out: |
| 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd) |
| 120 | { |
| 121 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 122 | |
| 123 | /* Without reset on resume, the HC won't work at all */ |
| 124 | xhci->quirks |= XHCI_RESET_ON_RESUME; |
| 125 | |
| 126 | return 0; |
| 127 | } |