RE: [PATCH 2/8] usb: cdns3: Split core.c into cdns3-plat and core.c file

From: Pawel Laszczak
Date: Wed Sep 30 2020 - 05:37:29 EST

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>
>
>On 20-09-28 14:27:35, Pawel Laszczak wrote:
>> Patch splits file core.c into core.c containing the common reusable code
>> and cnd3-plat.c containing device platform specific code. These changes
>
>cdns3-plat.c
>
>Pawel, at 5.10-rc1, there are some cdns3 driver updates at Felipe's
>next tree, you may create patches based on that to avoid rebase effects in
>future.
>

Yes, I know. The cdnsp is put in drivers/usb directory and I was not sure
on which repository I should based on.

This series can be successfully applied on Linux-Next and Greg (usb) repository.

As I remember we also have some patch not added to Felipe repository.
I hope that next version will contain all latest changes in drd.c and core.c.

Thanks
Pawel

>
>> are required to make possible reuse DRD part of CDNS3 driver in CDNSP
>> driver.
>>
>> Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
>> ---
>> drivers/usb/cdns3/Makefile | 2 +-
>> drivers/usb/cdns3/cdns3-plat.c | 209 +++++++++++++++++++++++++++++++++
>> drivers/usb/cdns3/core.c | 181 +++-------------------------
>> drivers/usb/cdns3/core.h | 8 +-
>> 4 files changed, 234 insertions(+), 166 deletions(-)
>> create mode 100644 drivers/usb/cdns3/cdns3-plat.c
>>
>> diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
>> index d47e341a6f39..a1fe9612053a 100644
>> --- a/drivers/usb/cdns3/Makefile
>> +++ b/drivers/usb/cdns3/Makefile
>> @@ -2,7 +2,7 @@
>> # define_trace.h needs to know how to find our header
>> CFLAGS_trace.o := -I$(src)
>>
>> -cdns3-y := core.o drd.o
>> +cdns3-y := cdns3-plat.o core.o drd.o
>>
>> obj-$(CONFIG_USB_CDNS3) += cdns3.o
>> cdns3-$(CONFIG_USB_CDNS3_GADGET) += gadget.o ep0.o
>> diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
>> new file mode 100644
>> index 000000000000..f35e9dca30fe
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/cdns3-plat.c
>> @@ -0,0 +1,209 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Cadence USBSS DRD Driver.
>> + *
>> + * Copyright (C) 2018-2020 Cadence.
>> + * Copyright (C) 2017-2018 NXP
>> + * Copyright (C) 2019 Texas Instrumentsq
>> + *
>> + *
>> + * Author: Peter Chen <peter.chen@xxxxxxx>
>> + * Pawel Laszczak <pawell@xxxxxxxxxxx>
>> + * Roger Quadros <rogerq@xxxxxx>
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/kernel.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/pm_runtime.h>
>> +
>> +#include "core.h"
>> +
>> +/**
>> + * 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 cdns3 *cdns;
>> + void __iomem *regs;
>> + int ret;
>> +
>> + cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
>> + if (!cdns)
>> + return -ENOMEM;
>> +
>> + cdns->dev = dev;
>> +
>> + platform_set_drvdata(pdev, cdns);
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
>> + if (!res) {
>> + dev_err(dev, "missing host IRQ\n");
>> + return -ENODEV;
>> + }
>> +
>> + cdns->xhci_res[0] = *res;
>> +
>> + 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 == -EPROBE_DEFER)
>> + return cdns->dev_irq;
>> +
>> + if (cdns->dev_irq < 0)
>> + dev_err(dev, "couldn't get peripheral irq\n");
>> +
>> + 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 == -EPROBE_DEFER)
>> + return cdns->otg_irq;
>> +
>> + if (cdns->otg_irq < 0) {
>> + dev_err(dev, "couldn't get otg irq\n");
>> + 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->otg_res = *res;
>> +
>> + 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 = phy_power_on(cdns->usb2_phy);
>> + if (ret)
>> + goto err_phy2_power_on;
>> +
>> + ret = phy_power_on(cdns->usb3_phy);
>> + if (ret)
>> + goto err_phy3_power_on;
>> +
>> + ret = cdns3_init(cdns);
>> + if (ret)
>> + goto err_cdns_init;
>> +
>> + device_set_wakeup_capable(dev, true);
>> + pm_runtime_set_active(dev);
>> + pm_runtime_enable(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);
>> +
>> + return 0;
>> +
>> +err_cdns_init:
>> + phy_power_off(cdns->usb3_phy);
>> +err_phy3_power_on:
>> + phy_power_off(cdns->usb2_phy);
>> +err_phy2_power_on:
>> + phy_exit(cdns->usb3_phy);
>> +err_phy3_init:
>> + phy_exit(cdns->usb2_phy);
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_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 cdns3 *cdns = platform_get_drvdata(pdev);
>> + struct device *dev = cdns->dev;
>> +
>> + pm_runtime_get_sync(dev);
>> + pm_runtime_disable(dev);
>> + pm_runtime_put_noidle(dev);
>> + cdns3_remove(cdns);
>> + phy_power_off(cdns->usb2_phy);
>> + phy_power_off(cdns->usb3_phy);
>> + phy_exit(cdns->usb2_phy);
>> + phy_exit(cdns->usb3_phy);
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_PM_SLEEP
>> +
>> +static int cdns3_plat_suspend(struct device *dev)
>> +{
>> + struct cdns3 *cdns = dev_get_drvdata(dev);
>> +
>> + return cdns3_suspend(cdns);
>> +}
>> +
>> +static int cdns3_plat_resume(struct device *dev)
>> +{
>> + struct cdns3 *cdns = dev_get_drvdata(dev);
>> +
>> + return cdns3_resume(cdns);
>> +}
>> +#endif
>> +
>> +static const struct dev_pm_ops cdns3_pm_ops = {
>> + SET_SYSTEM_SLEEP_PM_OPS(cdns3_plat_suspend, cdns3_plat_resume)
>> +};
>> +
>> +#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@xxxxxxxxxxx>");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
>> index 371128e9a4ae..079bd2abf65d 100644
>> --- a/drivers/usb/cdns3/core.c
>> +++ b/drivers/usb/cdns3/core.c
>> @@ -2,7 +2,7 @@
>> /*
>> * Cadence USBSS DRD Driver.
>> *
>> - * Copyright (C) 2018-2019 Cadence.
>> + * Copyright (C) 2018-2020 Cadence.
>> * Copyright (C) 2017-2018 NXP
>> * Copyright (C) 2019 Texas Instruments
>> *
>> @@ -383,17 +383,14 @@ static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role)
>>
>> /**
>> * cdns3_probe - probe for cdns3 core device
>> - * @pdev: Pointer to cdns3 core platform device
>> + * @cdns: Pointer to cdnsp structure.
>> *
>> * Returns 0 on success otherwise negative errno
>> */
>> -static int cdns3_probe(struct platform_device *pdev)
>> +int cdns3_init(struct cdns3 *cdns)
>> {
>> struct usb_role_switch_desc sw_desc = { };
>> - struct device *dev = &pdev->dev;
>> - struct resource *res;
>> - struct cdns3 *cdns;
>> - void __iomem *regs;
>> + struct device *dev = cdns->dev;
>> int ret;
>>
>> ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
>> @@ -402,85 +399,8 @@ static int cdns3_probe(struct platform_device *pdev)
>> return ret;
>> }
>>
>> - cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
>> - if (!cdns)
>> - return -ENOMEM;
>> -
>> - cdns->dev = dev;
>> -
>> - platform_set_drvdata(pdev, cdns);
>> -
>> - res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
>> - if (!res) {
>> - dev_err(dev, "missing host IRQ\n");
>> - return -ENODEV;
>> - }
>> -
>> - cdns->xhci_res[0] = *res;
>> -
>> - 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 == -EPROBE_DEFER)
>> - return cdns->dev_irq;
>> -
>> - if (cdns->dev_irq < 0)
>> - dev_err(dev, "couldn't get peripheral irq\n");
>> -
>> - 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 == -EPROBE_DEFER)
>> - return cdns->otg_irq;
>> -
>> - if (cdns->otg_irq < 0) {
>> - dev_err(dev, "couldn't get otg irq\n");
>> - 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->otg_res = *res;
>> -
>> mutex_init(&cdns->mutex);
>>
>> - 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 err1;
>> -
>> - ret = phy_power_on(cdns->usb2_phy);
>> - if (ret)
>> - goto err2;
>> -
>> - ret = phy_power_on(cdns->usb3_phy);
>> - if (ret)
>> - goto err3;
>> -
>> sw_desc.set = cdns3_role_set;
>> sw_desc.get = cdns3_role_get;
>> sw_desc.allow_userspace_control = true;
>> @@ -490,78 +410,47 @@ static int cdns3_probe(struct platform_device *pdev)
>>
>> cdns->role_sw = usb_role_switch_register(dev, &sw_desc);
>> if (IS_ERR(cdns->role_sw)) {
>> - ret = PTR_ERR(cdns->role_sw);
>> dev_warn(dev, "Unable to register Role Switch\n");
>> - goto err4;
>> + return PTR_ERR(cdns->role_sw);
>> }
>>
>> ret = cdns3_drd_init(cdns);
>> if (ret)
>> - goto err5;
>> + goto init_failed;
>>
>> ret = cdns3_core_init_role(cdns);
>> if (ret)
>> - goto err5;
>> -
>> - device_set_wakeup_capable(dev, true);
>> - pm_runtime_set_active(dev);
>> - pm_runtime_enable(dev);
>> + goto init_failed;
>>
>> - /*
>> - * 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);
>> dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
>>
>> return 0;
>> -err5:
>> +init_failed:
>> cdns3_drd_exit(cdns);
>> usb_role_switch_unregister(cdns->role_sw);
>> -err4:
>> - phy_power_off(cdns->usb3_phy);
>> -
>> -err3:
>> - phy_power_off(cdns->usb2_phy);
>> -err2:
>> - phy_exit(cdns->usb3_phy);
>> -err1:
>> - phy_exit(cdns->usb2_phy);
>>
>> return ret;
>> }
>>
>> /**
>> * cdns3_remove - unbind drd driver and clean up
>> - * @pdev: Pointer to Linux platform device
>> + * @cdns: Pointer to cdnsp structure.
>> *
>> * Returns 0 on success otherwise negative errno
>> */
>> -static int cdns3_remove(struct platform_device *pdev)
>> +int cdns3_remove(struct cdns3 *cdns)
>> {
>> - struct cdns3 *cdns = platform_get_drvdata(pdev);
>> -
>> - pm_runtime_get_sync(&pdev->dev);
>> - pm_runtime_disable(&pdev->dev);
>> - pm_runtime_put_noidle(&pdev->dev);
>> cdns3_exit_roles(cdns);
>> usb_role_switch_unregister(cdns->role_sw);
>> - phy_power_off(cdns->usb2_phy);
>> - phy_power_off(cdns->usb3_phy);
>> - phy_exit(cdns->usb2_phy);
>> - phy_exit(cdns->usb3_phy);
>> +
>> return 0;
>> }
>>
>> #ifdef CONFIG_PM_SLEEP
>>
>> -static int cdns3_suspend(struct device *dev)
>> +int cdns3_suspend(struct cdns3 *cdns)
>> {
>> - struct cdns3 *cdns = dev_get_drvdata(dev);
>> - unsigned long flags;
>> + struct device *dev = cdns->dev;
>>
>> if (cdns->role == USB_ROLE_HOST)
>> return 0;
>> @@ -569,28 +458,21 @@ static int cdns3_suspend(struct device *dev)
>> if (pm_runtime_status_suspended(dev))
>> pm_runtime_resume(dev);
>>
>> - if (cdns->roles[cdns->role]->suspend) {
>> - spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
>> + if (cdns->roles[cdns->role]->suspend)
>> cdns->roles[cdns->role]->suspend(cdns, false);
>> - spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
>> - }
>>
>> return 0;
>> }
>>
>> -static int cdns3_resume(struct device *dev)
>> +int cdns3_resume(struct cdns3 *cdns)
>> {
>> - struct cdns3 *cdns = dev_get_drvdata(dev);
>> - unsigned long flags;
>> + struct device *dev = cdns->dev;
>>
>> if (cdns->role == USB_ROLE_HOST)
>> return 0;
>>
>> - if (cdns->roles[cdns->role]->resume) {
>> - spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
>> + if (cdns->roles[cdns->role]->resume)
>> cdns->roles[cdns->role]->resume(cdns, false);
>> - spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
>> - }
>>
>> pm_runtime_disable(dev);
>> pm_runtime_set_active(dev);
>> @@ -599,32 +481,3 @@ static int cdns3_resume(struct device *dev)
>> return 0;
>> }
>> #endif
>> -
>> -static const struct dev_pm_ops cdns3_pm_ops = {
>> - SET_SYSTEM_SLEEP_PM_OPS(cdns3_suspend, cdns3_resume)
>> -};
>> -
>> -#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_probe,
>> - .remove = cdns3_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@xxxxxxxxxxx>");
>> -MODULE_LICENSE("GPL v2");
>> -MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
>> diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
>> index c09fdde3ae8f..284707c19620 100644
>> --- a/drivers/usb/cdns3/core.h
>> +++ b/drivers/usb/cdns3/core.h
>> @@ -3,7 +3,7 @@
>> * Cadence USBSS DRD Header File.
>> *
>> * Copyright (C) 2017-2018 NXP
>> - * Copyright (C) 2018-2019 Cadence.
>> + * Copyright (C) 2018-2020 Cadence.
>> *
>> * Authors: Peter Chen <peter.chen@xxxxxxx>
>> * Pawel Laszczak <pawell@xxxxxxxxxxx>
>> @@ -97,5 +97,11 @@ struct cdns3 {
>> };
>>
>> int cdns3_hw_role_switch(struct cdns3 *cdns);
>> +int cdns3_init(struct cdns3 *cdns);
>> +int cdns3_remove(struct cdns3 *cdns);
>>
>> +#ifdef CONFIG_PM_SLEEP
>> +int cdns3_resume(struct cdns3 *cdns);
>> +int cdns3_suspend(struct cdns3 *cdns);
>> +#endif /* CONFIG_PM_SLEEP */
>> #endif /* __LINUX_CDNS3_CORE_H */
>> --
>> 2.17.1
>>
>
>--
>
>Thanks,
>Peter Chen

Next message: Lorenz Bauer: "Re: [PATCH bpf-next v2 4/4] selftest: bpf: Test copying a sockmap and sockhash"
Previous message: Vignesh Raghavendra: "Re: [RESEND PATCH 1/2] mtd: spi-nor: do not touch TB bit without SPI_NOR_HAS_TB"
In reply to: Peter Chen: "Re: [PATCH 2/8] usb: cdns3: Split core.c into cdns3-plat and core.c file"
Next in thread: Pawel Laszczak: "[PATCH 4/8] usb: cdns3: Refactoring names in reusable code"
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