usb: cdns3: Split core.c into cdns3-plat and core.c file
Patch splits file core.c into core.c containing the common reusable code and cnd3-plat.c containing device platform specific code. These changes are required to make possible reuse DRD part of CDNS3 driver in CDNSP driver. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Tested-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Pawel Laszczak
committed by
Peter Chen
Peter Chen
parent
db8892bb1b
commit
f738957277
312
drivers/usb/cdns3/cdns3-plat.c
Normal file
312
drivers/usb/cdns3/cdns3-plat.c
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@@ -0,0 +1,312 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Cadence USBSS DRD Driver.
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*
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* Copyright (C) 2018-2020 Cadence.
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* Copyright (C) 2017-2018 NXP
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* Copyright (C) 2019 Texas Instruments
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*
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*
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* Author: Peter Chen <peter.chen@nxp.com>
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* Pawel Laszczak <pawell@cadence.com>
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* Roger Quadros <rogerq@ti.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include "core.h"
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static int set_phy_power_on(struct cdns3 *cdns)
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{
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int ret;
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ret = phy_power_on(cdns->usb2_phy);
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if (ret)
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return ret;
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ret = phy_power_on(cdns->usb3_phy);
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if (ret)
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phy_power_off(cdns->usb2_phy);
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return ret;
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}
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static void set_phy_power_off(struct cdns3 *cdns)
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{
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phy_power_off(cdns->usb3_phy);
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phy_power_off(cdns->usb2_phy);
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}
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/**
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* cdns3_plat_probe - probe for cdns3 core device
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* @pdev: Pointer to cdns3 core platform device
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*
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* Returns 0 on success otherwise negative errno
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*/
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static int cdns3_plat_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct cdns3 *cdns;
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void __iomem *regs;
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int ret;
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cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
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if (!cdns)
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return -ENOMEM;
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cdns->dev = dev;
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cdns->pdata = dev_get_platdata(dev);
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platform_set_drvdata(pdev, cdns);
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res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
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if (!res) {
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dev_err(dev, "missing host IRQ\n");
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return -ENODEV;
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}
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cdns->xhci_res[0] = *res;
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
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if (!res) {
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dev_err(dev, "couldn't get xhci resource\n");
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return -ENXIO;
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}
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cdns->xhci_res[1] = *res;
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cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
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if (cdns->dev_irq < 0)
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return cdns->dev_irq;
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regs = devm_platform_ioremap_resource_byname(pdev, "dev");
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if (IS_ERR(regs))
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return PTR_ERR(regs);
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cdns->dev_regs = regs;
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cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
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if (cdns->otg_irq < 0)
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return cdns->otg_irq;
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg");
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if (!res) {
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dev_err(dev, "couldn't get otg resource\n");
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return -ENXIO;
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}
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cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable");
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cdns->otg_res = *res;
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cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
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if (cdns->wakeup_irq == -EPROBE_DEFER)
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return cdns->wakeup_irq;
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else if (cdns->wakeup_irq == 0)
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return -EINVAL;
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if (cdns->wakeup_irq < 0) {
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dev_dbg(dev, "couldn't get wakeup irq\n");
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cdns->wakeup_irq = 0x0;
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}
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cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");
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if (IS_ERR(cdns->usb2_phy))
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return PTR_ERR(cdns->usb2_phy);
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ret = phy_init(cdns->usb2_phy);
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if (ret)
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return ret;
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cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");
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if (IS_ERR(cdns->usb3_phy))
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return PTR_ERR(cdns->usb3_phy);
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ret = phy_init(cdns->usb3_phy);
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if (ret)
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goto err_phy3_init;
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ret = set_phy_power_on(cdns);
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if (ret)
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goto err_phy_power_on;
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ret = cdns3_init(cdns);
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if (ret)
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goto err_cdns_init;
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device_set_wakeup_capable(dev, true);
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)))
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pm_runtime_forbid(dev);
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/*
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* The controller needs less time between bus and controller suspend,
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* and we also needs a small delay to avoid frequently entering low
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* power mode.
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*/
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pm_runtime_set_autosuspend_delay(dev, 20);
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pm_runtime_mark_last_busy(dev);
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pm_runtime_use_autosuspend(dev);
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return 0;
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err_cdns_init:
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set_phy_power_off(cdns);
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err_phy_power_on:
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phy_exit(cdns->usb3_phy);
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err_phy3_init:
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phy_exit(cdns->usb2_phy);
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return ret;
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}
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/**
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* cdns3_remove - unbind drd driver and clean up
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* @pdev: Pointer to Linux platform device
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*
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* Returns 0 on success otherwise negative errno
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*/
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static int cdns3_plat_remove(struct platform_device *pdev)
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{
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struct cdns3 *cdns = platform_get_drvdata(pdev);
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struct device *dev = cdns->dev;
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pm_runtime_get_sync(dev);
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pm_runtime_disable(dev);
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pm_runtime_put_noidle(dev);
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cdns3_remove(cdns);
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set_phy_power_off(cdns);
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phy_exit(cdns->usb2_phy);
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phy_exit(cdns->usb3_phy);
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return 0;
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}
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#ifdef CONFIG_PM
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static int cdns3_set_platform_suspend(struct device *dev,
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bool suspend, bool wakeup)
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{
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struct cdns3 *cdns = dev_get_drvdata(dev);
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int ret = 0;
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if (cdns->pdata && cdns->pdata->platform_suspend)
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ret = cdns->pdata->platform_suspend(dev, suspend, wakeup);
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return ret;
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}
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static int cdns3_controller_suspend(struct device *dev, pm_message_t msg)
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{
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struct cdns3 *cdns = dev_get_drvdata(dev);
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bool wakeup;
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unsigned long flags;
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if (cdns->in_lpm)
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return 0;
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if (PMSG_IS_AUTO(msg))
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wakeup = true;
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else
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wakeup = device_may_wakeup(dev);
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cdns3_set_platform_suspend(cdns->dev, true, wakeup);
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set_phy_power_off(cdns);
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spin_lock_irqsave(&cdns->lock, flags);
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cdns->in_lpm = true;
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spin_unlock_irqrestore(&cdns->lock, flags);
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dev_dbg(cdns->dev, "%s ends\n", __func__);
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return 0;
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}
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static int cdns3_controller_resume(struct device *dev, pm_message_t msg)
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{
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struct cdns3 *cdns = dev_get_drvdata(dev);
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int ret;
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unsigned long flags;
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if (!cdns->in_lpm)
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return 0;
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ret = set_phy_power_on(cdns);
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if (ret)
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return ret;
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cdns3_set_platform_suspend(cdns->dev, false, false);
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spin_lock_irqsave(&cdns->lock, flags);
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cdns3_resume(cdns, !PMSG_IS_AUTO(msg));
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cdns->in_lpm = false;
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spin_unlock_irqrestore(&cdns->lock, flags);
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if (cdns->wakeup_pending) {
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cdns->wakeup_pending = false;
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enable_irq(cdns->wakeup_irq);
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}
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dev_dbg(cdns->dev, "%s ends\n", __func__);
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return ret;
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}
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static int cdns3_plat_runtime_suspend(struct device *dev)
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{
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return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND);
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}
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static int cdns3_plat_runtime_resume(struct device *dev)
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{
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return cdns3_controller_resume(dev, PMSG_AUTO_RESUME);
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}
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#ifdef CONFIG_PM_SLEEP
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static int cdns3_plat_suspend(struct device *dev)
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{
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struct cdns3 *cdns = dev_get_drvdata(dev);
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cdns3_suspend(cdns);
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return cdns3_controller_suspend(dev, PMSG_SUSPEND);
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}
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static int cdns3_plat_resume(struct device *dev)
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{
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return cdns3_controller_resume(dev, PMSG_RESUME);
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}
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM */
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static const struct dev_pm_ops cdns3_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(cdns3_plat_suspend, cdns3_plat_resume)
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SET_RUNTIME_PM_OPS(cdns3_plat_runtime_suspend,
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cdns3_plat_runtime_resume, NULL)
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};
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#ifdef CONFIG_OF
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static const struct of_device_id of_cdns3_match[] = {
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{ .compatible = "cdns,usb3" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, of_cdns3_match);
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#endif
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static struct platform_driver cdns3_driver = {
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.probe = cdns3_plat_probe,
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.remove = cdns3_plat_remove,
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.driver = {
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.name = "cdns-usb3",
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.of_match_table = of_match_ptr(of_cdns3_match),
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.pm = &cdns3_pm_ops,
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},
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};
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module_platform_driver(cdns3_driver);
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MODULE_ALIAS("platform:cdns3");
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MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
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