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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/cdns3/cdns3-plat.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-plat.c')
-rw-r--r-- | drivers/usb/cdns3/cdns3-plat.c | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c new file mode 100644 index 000000000..726b2e4f6 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-plat.c @@ -0,0 +1,337 @@ +// 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/platform_device.h> +#include <linux/pm_runtime.h> + +#include "core.h" +#include "gadget-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); +} + +/** + * 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); + + 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 cdns->dev_irq; + + regs = devm_platform_ioremap_resource_byname(pdev, "dev"); + if (IS_ERR(regs)) + return PTR_ERR(regs); + cdns->dev_regs = regs; + + cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); + if (cdns->otg_irq < 0) + return cdns->otg_irq; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg"); + if (!res) { + dev_err(dev, "couldn't get otg resource\n"); + return -ENXIO; + } + + cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable"); + + cdns->otg_res = *res; + + 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 PTR_ERR(cdns->usb2_phy); + + ret = phy_init(cdns->usb2_phy); + if (ret) + return ret; + + cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy"); + if (IS_ERR(cdns->usb3_phy)) + return PTR_ERR(cdns->usb3_phy); + + 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; + + cdns->gadget_init = cdns3_gadget_init; + + ret = cdns_init(cdns); + if (ret) + goto err_cdns_init; + + 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: + 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 + * + * Returns 0 on success otherwise negative errno + */ +static int cdns3_plat_remove(struct platform_device *pdev) +{ + struct cdns *cdns = platform_get_drvdata(pdev); + struct device *dev = cdns->dev; + + pm_runtime_get_sync(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); + return 0; +} + +#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" }, + { }, +}; +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"); +MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver"); |