^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * USB cluster support for Armada 375 platform.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 Marvell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Gregory CLEMENT <gregory.clement@free-electrons.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Armada 375 comes with an USB2 host and device controller and an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * USB3 controller. The USB cluster control register allows to manage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * common features of both USB controllers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <dt-bindings/phy/phy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/phy/phy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define USB2_PHY_CONFIG_DISABLE BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct armada375_cluster_phy {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) void __iomem *reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) bool use_usb3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int phy_provided;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int armada375_usb_phy_init(struct phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct armada375_cluster_phy *cluster_phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u32 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) cluster_phy = phy_get_drvdata(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (!cluster_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) reg = readl(cluster_phy->reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (cluster_phy->use_usb3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) reg |= USB2_PHY_CONFIG_DISABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) reg &= ~USB2_PHY_CONFIG_DISABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) writel(reg, cluster_phy->reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static const struct phy_ops armada375_usb_phy_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .init = armada375_usb_phy_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * Only one controller can use this PHY. We shouldn't have the case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * when two controllers want to use this PHY. But if this case occurs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * then we provide a phy to the first one and return an error for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * next one. This error has also to be an error returned by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * devm_phy_optional_get() so different from ENODEV for USB2. In the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * USB3 case it still optional and we use ENODEV.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static struct phy *armada375_usb_phy_xlate(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct of_phandle_args *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct armada375_cluster_phy *cluster_phy = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (!cluster_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * Either the phy had never been requested and then the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * usb claiming it can get it, or it had already been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * requested in this case, we only allow to use it with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * same configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (WARN_ON((cluster_phy->phy_provided != PHY_NONE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) (cluster_phy->phy_provided != args->args[0]))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) dev_err(dev, "This PHY has already been provided!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dev_err(dev, "Check your device tree, only one controller can use it\n.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (args->args[0] == PHY_TYPE_USB2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return ERR_PTR(-EBUSY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (args->args[0] == PHY_TYPE_USB2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) cluster_phy->use_usb3 = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) else if (args->args[0] == PHY_TYPE_USB3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) cluster_phy->use_usb3 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_err(dev, "Invalid PHY mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* Store which phy mode is used for next test */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) cluster_phy->phy_provided = args->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return cluster_phy->phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int armada375_usb_phy_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct phy_provider *phy_provider;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) void __iomem *usb_cluster_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct armada375_cluster_phy *cluster_phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) cluster_phy = devm_kzalloc(dev, sizeof(*cluster_phy), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (!cluster_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) usb_cluster_base = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (IS_ERR(usb_cluster_base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return PTR_ERR(usb_cluster_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) phy = devm_phy_create(dev, NULL, &armada375_usb_phy_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (IS_ERR(phy)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_err(dev, "failed to create PHY\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return PTR_ERR(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) cluster_phy->phy = phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) cluster_phy->reg = usb_cluster_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) dev_set_drvdata(dev, cluster_phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) phy_set_drvdata(phy, cluster_phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) phy_provider = devm_of_phy_provider_register(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) armada375_usb_phy_xlate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return PTR_ERR_OR_ZERO(phy_provider);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static const struct of_device_id of_usb_cluster_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) { .compatible = "marvell,armada-375-usb-cluster", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) { /* end of list */ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static struct platform_driver armada375_usb_phy_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .probe = armada375_usb_phy_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .of_match_table = of_usb_cluster_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .name = "armada-375-usb-cluster",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) builtin_platform_driver(armada375_usb_phy_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags