| // SPDX-License-Identifier: GPL-2.0 | |
| /* | |
| * Cadence USBSS DRD Driver. | |
| * | |
| * Copyright (C) 2018-2020 Cadence. | |
| * Copyright (C) 2017-2018 NXP | |
| * Copyright (C) 2019 Texas Instruments | |
| * | |
| * | |
| * Author: Peter Chen <peter.chen@nxp.com> | |
| * Pawel Laszczak <pawell@cadence.com> | |
| * Roger Quadros <rogerq@ti.com> | |
| */ | |
| #include <linux/module.h> | |
| #include <linux/irq.h> | |
| #include <linux/kernel.h> | |
| #include <linux/of.h> | |
| #include <linux/platform_device.h> | |
| #include <linux/pm_runtime.h> | |
| #include "core.h" | |
| #include "gadget-export.h" | |
| #include "host-export.h" | |
| #include "drd.h" | |
| static int set_phy_power_on(struct cdns *cdns) | |
| { | |
| int ret; | |
| ret = phy_power_on(cdns->usb2_phy); | |
| if (ret) | |
| return ret; | |
| ret = phy_power_on(cdns->usb3_phy); | |
| if (ret) | |
| phy_power_off(cdns->usb2_phy); | |
| return ret; | |
| } | |
| static void set_phy_power_off(struct cdns *cdns) | |
| { | |
| phy_power_off(cdns->usb3_phy); | |
| phy_power_off(cdns->usb2_phy); | |
| } | |
| static int cdns3_plat_gadget_init(struct cdns *cdns) | |
| { | |
| if (cdns->version < CDNSP_CONTROLLER_V2) | |
| return cdns3_gadget_init(cdns); | |
| else | |
| return cdnsp_gadget_init(cdns); | |
| } | |
| static int cdns3_plat_host_init(struct cdns *cdns) | |
| { | |
| return cdns_host_init(cdns); | |
| } | |
| /** | |
| * cdns3_plat_probe - probe for cdns3 core device | |
| * @pdev: Pointer to cdns3 core platform device | |
| * | |
| * Returns 0 on success otherwise negative errno | |
| */ | |
| static int cdns3_plat_probe(struct platform_device *pdev) | |
| { | |
| struct device *dev = &pdev->dev; | |
| struct resource *res; | |
| struct cdns *cdns; | |
| void __iomem *regs; | |
| int ret; | |
| cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL); | |
| if (!cdns) | |
| return -ENOMEM; | |
| cdns->dev = dev; | |
| cdns->pdata = dev_get_platdata(dev); | |
| if (cdns->pdata && cdns->pdata->override_apb_timeout) | |
| cdns->override_apb_timeout = cdns->pdata->override_apb_timeout; | |
| if (device_is_compatible(dev, "cdns,cdnsp")) { | |
| cdns->no_drd = true; | |
| cdns->version = CDNSP_CONTROLLER_V2; | |
| dev_dbg(dev, "No DRD support\n"); | |
| } | |
| platform_set_drvdata(pdev, cdns); | |
| ret = platform_get_irq_byname(pdev, "host"); | |
| if (ret < 0) | |
| return ret; | |
| cdns->xhci_res[0].start = ret; | |
| cdns->xhci_res[0].end = ret; | |
| cdns->xhci_res[0].flags = IORESOURCE_IRQ | irq_get_trigger_type(ret); | |
| cdns->xhci_res[0].name = "host"; | |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci"); | |
| if (!res) { | |
| dev_err(dev, "couldn't get xhci resource\n"); | |
| return -ENXIO; | |
| } | |
| cdns->xhci_res[1] = *res; | |
| cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); | |
| if (cdns->dev_irq < 0) | |
| return dev_err_probe(dev, cdns->dev_irq, | |
| "Failed to get peripheral IRQ\n"); | |
| regs = devm_platform_ioremap_resource_byname(pdev, "dev"); | |
| if (IS_ERR(regs)) | |
| return dev_err_probe(dev, PTR_ERR(regs), | |
| "Failed to get dev base\n"); | |
| cdns->dev_regs = regs; | |
| if (!cdns->no_drd) { | |
| cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); | |
| if (cdns->otg_irq < 0) | |
| return dev_err_probe(dev, cdns->otg_irq, | |
| "Failed to get otg IRQ\n"); | |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg"); | |
| if (!res) { | |
| dev_err(dev, "couldn't get otg resource\n"); | |
| return -ENXIO; | |
| } | |
| cdns->otg_res = *res; | |
| } | |
| cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable"); | |
| cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup"); | |
| if (cdns->wakeup_irq == -EPROBE_DEFER) | |
| return cdns->wakeup_irq; | |
| if (cdns->wakeup_irq < 0) { | |
| dev_dbg(dev, "couldn't get wakeup irq\n"); | |
| cdns->wakeup_irq = 0x0; | |
| } | |
| cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy"); | |
| if (IS_ERR(cdns->usb2_phy)) | |
| return dev_err_probe(dev, PTR_ERR(cdns->usb2_phy), | |
| "Failed to get cdns3,usb2-phy\n"); | |
| cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy"); | |
| if (IS_ERR(cdns->usb3_phy)) | |
| return dev_err_probe(dev, PTR_ERR(cdns->usb3_phy), | |
| "Failed to get cdns3,usb3-phy\n"); | |
| ret = phy_init(cdns->usb2_phy); | |
| if (ret) | |
| return ret; | |
| ret = phy_init(cdns->usb3_phy); | |
| if (ret) | |
| goto err_phy3_init; | |
| ret = set_phy_power_on(cdns); | |
| if (ret) | |
| goto err_phy_power_on; | |
| ret = cdns_init(cdns); | |
| if (ret) | |
| goto err_cdns_init; | |
| cdns->gadget_init = cdns3_plat_gadget_init; | |
| cdns->host_init = cdns3_plat_host_init; | |
| ret = cdns_core_init_role(cdns); | |
| if (ret) | |
| goto err_cdns_init_role; | |
| device_set_wakeup_capable(dev, true); | |
| pm_runtime_set_active(dev); | |
| pm_runtime_enable(dev); | |
| if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))) | |
| pm_runtime_forbid(dev); | |
| /* | |
| * The controller needs less time between bus and controller suspend, | |
| * and we also needs a small delay to avoid frequently entering low | |
| * power mode. | |
| */ | |
| pm_runtime_set_autosuspend_delay(dev, 20); | |
| pm_runtime_mark_last_busy(dev); | |
| pm_runtime_use_autosuspend(dev); | |
| return 0; | |
| err_cdns_init_role: | |
| if (cdns->role_sw) | |
| usb_role_switch_unregister(cdns->role_sw); | |
| err_cdns_init: | |
| set_phy_power_off(cdns); | |
| err_phy_power_on: | |
| phy_exit(cdns->usb3_phy); | |
| err_phy3_init: | |
| phy_exit(cdns->usb2_phy); | |
| return ret; | |
| } | |
| /** | |
| * cdns3_plat_remove() - unbind drd driver and clean up | |
| * @pdev: Pointer to Linux platform device | |
| */ | |
| static void cdns3_plat_remove(struct platform_device *pdev) | |
| { | |
| struct cdns *cdns = platform_get_drvdata(pdev); | |
| struct device *dev = cdns->dev; | |
| pm_runtime_get_sync(dev); | |
| if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))) | |
| pm_runtime_allow(dev); | |
| pm_runtime_disable(dev); | |
| pm_runtime_put_noidle(dev); | |
| cdns_remove(cdns); | |
| set_phy_power_off(cdns); | |
| phy_exit(cdns->usb2_phy); | |
| phy_exit(cdns->usb3_phy); | |
| } | |
| #ifdef CONFIG_PM | |
| static int cdns3_set_platform_suspend(struct device *dev, | |
| bool suspend, bool wakeup) | |
| { | |
| struct cdns *cdns = dev_get_drvdata(dev); | |
| int ret = 0; | |
| if (cdns->pdata && cdns->pdata->platform_suspend) | |
| ret = cdns->pdata->platform_suspend(dev, suspend, wakeup); | |
| return ret; | |
| } | |
| static int cdns3_controller_suspend(struct device *dev, pm_message_t msg) | |
| { | |
| struct cdns *cdns = dev_get_drvdata(dev); | |
| bool wakeup; | |
| unsigned long flags; | |
| if (cdns->in_lpm) | |
| return 0; | |
| if (PMSG_IS_AUTO(msg)) | |
| wakeup = true; | |
| else | |
| wakeup = device_may_wakeup(dev); | |
| cdns3_set_platform_suspend(cdns->dev, true, wakeup); | |
| set_phy_power_off(cdns); | |
| spin_lock_irqsave(&cdns->lock, flags); | |
| cdns->in_lpm = true; | |
| spin_unlock_irqrestore(&cdns->lock, flags); | |
| dev_dbg(cdns->dev, "%s ends\n", __func__); | |
| return 0; | |
| } | |
| static int cdns3_controller_resume(struct device *dev, pm_message_t msg) | |
| { | |
| struct cdns *cdns = dev_get_drvdata(dev); | |
| int ret; | |
| unsigned long flags; | |
| if (!cdns->in_lpm) | |
| return 0; | |
| if (cdns_power_is_lost(cdns)) { | |
| phy_exit(cdns->usb2_phy); | |
| ret = phy_init(cdns->usb2_phy); | |
| if (ret) | |
| return ret; | |
| phy_exit(cdns->usb3_phy); | |
| ret = phy_init(cdns->usb3_phy); | |
| if (ret) | |
| return ret; | |
| } | |
| ret = set_phy_power_on(cdns); | |
| if (ret) | |
| return ret; | |
| cdns3_set_platform_suspend(cdns->dev, false, false); | |
| spin_lock_irqsave(&cdns->lock, flags); | |
| cdns_resume(cdns); | |
| cdns->in_lpm = false; | |
| spin_unlock_irqrestore(&cdns->lock, flags); | |
| cdns_set_active(cdns, !PMSG_IS_AUTO(msg)); | |
| if (cdns->wakeup_pending) { | |
| cdns->wakeup_pending = false; | |
| enable_irq(cdns->wakeup_irq); | |
| } | |
| dev_dbg(cdns->dev, "%s ends\n", __func__); | |
| return ret; | |
| } | |
| static int cdns3_plat_runtime_suspend(struct device *dev) | |
| { | |
| return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND); | |
| } | |
| static int cdns3_plat_runtime_resume(struct device *dev) | |
| { | |
| return cdns3_controller_resume(dev, PMSG_AUTO_RESUME); | |
| } | |
| #ifdef CONFIG_PM_SLEEP | |
| static int cdns3_plat_suspend(struct device *dev) | |
| { | |
| struct cdns *cdns = dev_get_drvdata(dev); | |
| int ret; | |
| cdns_suspend(cdns); | |
| ret = cdns3_controller_suspend(dev, PMSG_SUSPEND); | |
| if (ret) | |
| return ret; | |
| if (device_may_wakeup(dev) && cdns->wakeup_irq) | |
| enable_irq_wake(cdns->wakeup_irq); | |
| return ret; | |
| } | |
| static int cdns3_plat_resume(struct device *dev) | |
| { | |
| return cdns3_controller_resume(dev, PMSG_RESUME); | |
| } | |
| #endif /* CONFIG_PM_SLEEP */ | |
| #endif /* CONFIG_PM */ | |
| static const struct dev_pm_ops cdns3_pm_ops = { | |
| SET_SYSTEM_SLEEP_PM_OPS(cdns3_plat_suspend, cdns3_plat_resume) | |
| SET_RUNTIME_PM_OPS(cdns3_plat_runtime_suspend, | |
| cdns3_plat_runtime_resume, NULL) | |
| }; | |
| #ifdef CONFIG_OF | |
| static const struct of_device_id of_cdns3_match[] = { | |
| { .compatible = "cdns,usb3" }, | |
| { .compatible = "cdns,cdnsp" }, | |
| { }, | |
| }; | |
| MODULE_DEVICE_TABLE(of, of_cdns3_match); | |
| #endif | |
| static struct platform_driver cdns3_driver = { | |
| .probe = cdns3_plat_probe, | |
| .remove = cdns3_plat_remove, | |
| .driver = { | |
| .name = "cdns-usb3", | |
| .of_match_table = of_match_ptr(of_cdns3_match), | |
| .pm = &cdns3_pm_ops, | |
| }, | |
| }; | |
| module_platform_driver(cdns3_driver); | |
| MODULE_ALIAS("platform:cdns3"); |