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Date: Tue, 10 Nov 2020 09:09:23 +0000
From: Peter Chen <peter.chen@....com>
To: Pawel Laszczak <pawell@...ence.com>
CC: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"balbi@...nel.org" <balbi@...nel.org>,
"colin.king@...onical.com" <colin.king@...onical.com>,
"rogerq@...com" <rogerq@...com>,
"kurahul@...ence.com" <kurahul@...ence.com>,
"nsekhar@...com" <nsekhar@...com>
Subject: Re: [PATCH v2 03/10] usb: cdns3: Moves reusable code to separate
module
On 20-11-06 12:42:53, Pawel Laszczak wrote:
> Patch moves common reusable code used by cdns3 and cdnsp driver
> to cdns-usb-common library. This library include core.c, drd.c
> and host.c files.
>
> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
> ---
> drivers/usb/cdns3/Kconfig | 8 ++++++++
> drivers/usb/cdns3/Makefile | 8 +++++---
> drivers/usb/cdns3/cdns3-plat.c | 2 ++
> drivers/usb/cdns3/core.c | 18 +++++++++++++++---
> drivers/usb/cdns3/core.h | 11 +++++++----
> drivers/usb/cdns3/drd.c | 3 ++-
> drivers/usb/cdns3/drd.h | 4 ++--
> 7 files changed, 41 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig
> index 84716d216ae5..58154c0a73ac 100644
> --- a/drivers/usb/cdns3/Kconfig
> +++ b/drivers/usb/cdns3/Kconfig
> @@ -1,8 +1,15 @@
> +config CDNS_USB_COMMON
> + tristate
> +
> +config CDNS_USB_HOST
> + bool
> +
> config USB_CDNS3
> tristate "Cadence USB3 Dual-Role Controller"
> depends on USB_SUPPORT && (USB || USB_GADGET) && HAS_DMA
> select USB_XHCI_PLATFORM if USB_XHCI_HCD
> select USB_ROLE_SWITCH
> + select CDNS_USB_COMMON
> help
> Say Y here if your system has a Cadence USB3 dual-role controller.
> It supports: dual-role switch, Host-only, and Peripheral-only.
> @@ -25,6 +32,7 @@ config USB_CDNS3_GADGET
> config USB_CDNS3_HOST
> bool "Cadence USB3 host controller"
> depends on USB=y || USB=USB_CDNS3
> + select CDNS_USB_HOST
> help
> Say Y here to enable host controller functionality of the
> Cadence driver.
> diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
> index a1fe9612053a..16df87abf3cf 100644
> --- a/drivers/usb/cdns3/Makefile
> +++ b/drivers/usb/cdns3/Makefile
> @@ -2,17 +2,19 @@
> # define_trace.h needs to know how to find our header
> CFLAGS_trace.o := -I$(src)
>
> -cdns3-y := cdns3-plat.o core.o drd.o
> +cdns-usb-common-y := core.o drd.o
> +cdns3-y := cdns3-plat.o
>
> obj-$(CONFIG_USB_CDNS3) += cdns3.o
> +obj-$(CONFIG_CDNS_USB_COMMON) += cdns-usb-common.o
> +
> +cdns-usb-common-$(CONFIG_CDNS_USB_HOST) += host.o
> cdns3-$(CONFIG_USB_CDNS3_GADGET) += gadget.o ep0.o
>
> ifneq ($(CONFIG_USB_CDNS3_GADGET),)
> cdns3-$(CONFIG_TRACING) += trace.o
> endif
>
> -cdns3-$(CONFIG_USB_CDNS3_HOST) += host.o
> -
> obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o
> obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o
> obj-$(CONFIG_USB_CDNS3_IMX) += cdns3-imx.o
> diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
> index b74882af3a9f..562163c81911 100644
> --- a/drivers/usb/cdns3/cdns3-plat.c
> +++ b/drivers/usb/cdns3/cdns3-plat.c
> @@ -18,6 +18,7 @@
> #include <linux/pm_runtime.h>
>
> #include "core.h"
> +#include "gadget-export.h"
>
> static int set_phy_power_on(struct cdns3 *cdns)
> {
> @@ -134,6 +135,7 @@ static int cdns3_plat_probe(struct platform_device *pdev)
> if (ret)
> goto err_phy_power_on;
>
> + cdns->gadget_init = cdns3_gadget_init;
> ret = cdns3_init(cdns);
> if (ret)
> goto err_cdns_init;
> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
> index 758fd5d67196..4fedf32855af 100644
> --- a/drivers/usb/cdns3/core.c
> +++ b/drivers/usb/cdns3/core.c
> @@ -19,10 +19,8 @@
> #include <linux/io.h>
> #include <linux/pm_runtime.h>
>
> -#include "gadget.h"
> #include "core.h"
> #include "host-export.h"
> -#include "gadget-export.h"
> #include "drd.h"
>
> static int cdns3_idle_init(struct cdns3 *cdns);
> @@ -147,7 +145,11 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
> }
>
> if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
> - ret = cdns3_gadget_init(cdns);
> + if (cdns->gadget_init)
> + ret = cdns->gadget_init(cdns);
> + else
> + ret = -ENXIO;
> +
> if (ret) {
> dev_err(dev, "Device initialization failed with %d\n",
> ret);
> @@ -473,6 +475,7 @@ int cdns3_init(struct cdns3 *cdns)
>
> return ret;
> }
> +EXPORT_SYMBOL_GPL(cdns3_init);
>
> /**
> * cdns3_remove - unbind drd driver and clean up
> @@ -487,6 +490,7 @@ int cdns3_remove(struct cdns3 *cdns)
>
> return 0;
> }
> +EXPORT_SYMBOL_GPL(cdns3_remove);
>
> #ifdef CONFIG_PM_SLEEP
> int cdns3_suspend(struct cdns3 *cdns)
> @@ -505,6 +509,7 @@ int cdns3_suspend(struct cdns3 *cdns)
>
> return 0;
> }
> +EXPORT_SYMBOL_GPL(cdns3_suspend);
>
> int cdns3_resume(struct cdns3 *cdns, u8 set_active)
> {
> @@ -521,4 +526,11 @@ int cdns3_resume(struct cdns3 *cdns, u8 set_active)
>
> return 0;
> }
> +EXPORT_SYMBOL_GPL(cdns3_resume);
> #endif /* CONFIG_PM_SLEEP */
> +
> +MODULE_AUTHOR("Peter Chen <peter.chen@....com>");
> +MODULE_AUTHOR("Pawel Laszczak <pawell@...ence.com>");
> +MODULE_AUTHOR("Roger Quadros <rogerq@...com>");
> +MODULE_DESCRIPTION("Cadence USBSS and USBSSP DRD Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
> index 7e5d9a344a53..96bdab7e8357 100644
> --- a/drivers/usb/cdns3/core.h
> +++ b/drivers/usb/cdns3/core.h
> @@ -75,6 +75,7 @@ struct cdns3_platform_data {
> * @wakeup_pending: wakeup interrupt pending
> * @pdata: platform data from glue layer
> * @lock: spinlock structure
> + * @gadget_init: pointer to gadget initialization function
> */
> struct cdns3 {
> struct device *dev;
> @@ -111,14 +112,16 @@ struct cdns3 {
> bool wakeup_pending;
> struct cdns3_platform_data *pdata;
> spinlock_t lock;
> +
> + int (*gadget_init)(struct cdns3 *cdns);
> };
>
> int cdns3_hw_role_switch(struct cdns3 *cdns);
> -int cdns3_init(struct cdns3 *cdns);
> -int cdns3_remove(struct cdns3 *cdns);
> +extern int cdns3_init(struct cdns3 *cdns);
> +extern int cdns3_remove(struct cdns3 *cdns);
Why add "extern" here and below?
Peter
>
> #ifdef CONFIG_PM_SLEEP
> -int cdns3_resume(struct cdns3 *cdns, u8 set_active);
> -int cdns3_suspend(struct cdns3 *cdns);
> +extern int cdns3_resume(struct cdns3 *cdns, u8 set_active);
> +extern int cdns3_suspend(struct cdns3 *cdns);
> #endif /* CONFIG_PM_SLEEP */
> #endif /* __LINUX_CDNS3_CORE_H */
> diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c
> index ed8cde91a02c..1874dc6018f0 100644
> --- a/drivers/usb/cdns3/drd.c
> +++ b/drivers/usb/cdns3/drd.c
> @@ -15,7 +15,6 @@
> #include <linux/iopoll.h>
> #include <linux/usb/otg.h>
>
> -#include "gadget.h"
> #include "drd.h"
> #include "core.h"
>
> @@ -226,6 +225,7 @@ int cdns3_drd_gadget_on(struct cdns3 *cdns)
> phy_set_mode(cdns->usb3_phy, PHY_MODE_USB_DEVICE);
> return 0;
> }
> +EXPORT_SYMBOL_GPL(cdns3_drd_gadget_on);
>
> /**
> * cdns3_drd_gadget_off - stop gadget.
> @@ -249,6 +249,7 @@ void cdns3_drd_gadget_off(struct cdns3 *cdns)
> 1, 2000000);
> phy_set_mode(cdns->usb3_phy, PHY_MODE_INVALID);
> }
> +EXPORT_SYMBOL_GPL(cdns3_drd_gadget_off);
>
> /**
> * cdns3_init_otg_mode - initialize drd controller
> diff --git a/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h
> index d752d8806a38..972aba8a40b6 100644
> --- a/drivers/usb/cdns3/drd.h
> +++ b/drivers/usb/cdns3/drd.h
> @@ -209,8 +209,8 @@ int cdns3_get_vbus(struct cdns3 *cdns);
> int cdns3_drd_init(struct cdns3 *cdns);
> int cdns3_drd_exit(struct cdns3 *cdns);
> int cdns3_drd_update_mode(struct cdns3 *cdns);
> -int cdns3_drd_gadget_on(struct cdns3 *cdns);
> -void cdns3_drd_gadget_off(struct cdns3 *cdns);
> +extern int cdns3_drd_gadget_on(struct cdns3 *cdns);
> +extern void cdns3_drd_gadget_off(struct cdns3 *cdns);
> int cdns3_drd_host_on(struct cdns3 *cdns);
> void cdns3_drd_host_off(struct cdns3 *cdns);
>
> --
> 2.17.1
>
--
Thanks,
Peter Chen
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