Added utility macros, kernel device creation and cleanup, functions for handling log formatting and a placeholder module for MA-USB Host device driver. Signed-off-by: Vladimir Stankovic <vladimir.stankovic@xxxxxxxxxxxxxxx> --- MAINTAINERS | 7 +++++ drivers/usb/Kconfig | 2 ++ drivers/usb/Makefile | 1 + drivers/usb/host/mausb/Kconfig | 15 +++++++++ drivers/usb/host/mausb/Makefile | 10 ++++++ drivers/usb/host/mausb/mausb_core.c | 24 +++++++++++++++ drivers/usb/host/mausb/utils.c | 47 +++++++++++++++++++++++++++++ drivers/usb/host/mausb/utils.h | 15 +++++++++ 8 files changed, 121 insertions(+) create mode 100644 drivers/usb/host/mausb/Kconfig create mode 100644 drivers/usb/host/mausb/Makefile create mode 100644 drivers/usb/host/mausb/mausb_core.c create mode 100644 drivers/usb/host/mausb/utils.c create mode 100644 drivers/usb/host/mausb/utils.h diff --git a/MAINTAINERS b/MAINTAINERS index 091ec22c1a23..9b7b79215f47 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10343,6 +10343,13 @@ W: https://linuxtv.org T: git git://linuxtv.org/media_tree.git F: drivers/media/radio/radio-maxiradio* +MEDIA AGNOSTIC (MA) USB HOST DRIVER +M: Vladimir Stankovic <vladimir.stankovic@xxxxxxxxxxxxxxx> +L: mausb-host-devel@xxxxxxxxxxxxxxx +W: https://www.displaylink.com +S: Maintained +F: drivers/usb/host/mausb/* + MCAN MMIO DEVICE DRIVER M: Dan Murphy <dmurphy@xxxxxx> M: Sriram Dash <sriram.dash@xxxxxxxxxxx> diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 275568abc670..35f5c3ac6656 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -99,6 +99,8 @@ source "drivers/usb/mon/Kconfig" source "drivers/usb/host/Kconfig" +source "drivers/usb/host/mausb/Kconfig" + source "drivers/usb/renesas_usbhs/Kconfig" source "drivers/usb/class/Kconfig" diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile index 1c1c1d659394..2389b55723ab 100644 --- a/drivers/usb/Makefile +++ b/drivers/usb/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_USB_IMX21_HCD) += host/ obj-$(CONFIG_USB_FSL_USB2) += host/ obj-$(CONFIG_USB_FOTG210_HCD) += host/ obj-$(CONFIG_USB_MAX3421_HCD) += host/ +obj-$(CONFIG_USB_HOST_MAUSB) += host/mausb/ obj-$(CONFIG_USB_C67X00_HCD) += c67x00/ diff --git a/drivers/usb/host/mausb/Kconfig b/drivers/usb/host/mausb/Kconfig new file mode 100644 index 000000000000..ba72ef42f942 --- /dev/null +++ b/drivers/usb/host/mausb/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Kernel configuration file for MA-USB Host driver. +# +# Copyright (c) 2019 - 2020 DisplayLink (UK) Ltd. +# + +config USB_HOST_MAUSB + tristate "Media Agnostic (MA) USB Host Driver" + depends on USB=y + help + This is a Media Agnostic (MA) USB Host driver which enables host + communication via MA USB protocol stack. + + If this driver is compiled as a module, it will be named mausb_host. diff --git a/drivers/usb/host/mausb/Makefile b/drivers/usb/host/mausb/Makefile new file mode 100644 index 000000000000..cafccac0edba --- /dev/null +++ b/drivers/usb/host/mausb/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for DisplayLink MA-USB Host driver. +# +# Copyright (c) 2019 - 2020 DisplayLink (UK) Ltd. +# + +obj-$(CONFIG_USB_HOST_MAUSB) += mausb_host.o +mausb_host-y := mausb_core.o +mausb_host-y += utils.o diff --git a/drivers/usb/host/mausb/mausb_core.c b/drivers/usb/host/mausb/mausb_core.c new file mode 100644 index 000000000000..44f76a1b74de --- /dev/null +++ b/drivers/usb/host/mausb/mausb_core.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 - 2020 DisplayLink (UK) Ltd. + */ +#include <linux/module.h> + +#include "utils.h" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("DisplayLink (UK) Ltd."); + +static int mausb_host_init(void) +{ + return mausb_host_dev_register(); +} + +static void mausb_host_exit(void) +{ + dev_info(mausb_host_dev.this_device, "Module unloading started..."); + mausb_host_dev_deregister(); +} + +module_init(mausb_host_init); +module_exit(mausb_host_exit); diff --git a/drivers/usb/host/mausb/utils.c b/drivers/usb/host/mausb/utils.c new file mode 100644 index 000000000000..1cfa2140311e --- /dev/null +++ b/drivers/usb/host/mausb/utils.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 - 2020 DisplayLink (UK) Ltd. + */ +#include "utils.h" + +#include <linux/fs.h> +#include <linux/slab.h> + +#define MAUSB_KERNEL_DEV_NAME "mausb_host" +#define MAUSB_READ_DEVICE_TIMEOUT_MS 500 + +struct miscdevice mausb_host_dev; + +static int mausb_host_dev_open(struct inode *inode, struct file *filp) +{ + filp->private_data = NULL; + + return 0; +} + +static int mausb_host_dev_release(struct inode *inode, struct file *filp) +{ + kfree(filp->private_data); + filp->private_data = NULL; + + return 0; +} + +static const struct file_operations mausb_host_dev_fops = { + .open = mausb_host_dev_open, + .release = mausb_host_dev_release, +}; + +int mausb_host_dev_register(void) +{ + mausb_host_dev.minor = MISC_DYNAMIC_MINOR; + mausb_host_dev.name = MAUSB_KERNEL_DEV_NAME; + mausb_host_dev.fops = &mausb_host_dev_fops; + mausb_host_dev.mode = 0; + return misc_register(&mausb_host_dev); +} + +void mausb_host_dev_deregister(void) +{ + misc_deregister(&mausb_host_dev); +} diff --git a/drivers/usb/host/mausb/utils.h b/drivers/usb/host/mausb/utils.h new file mode 100644 index 000000000000..e810e691c39d --- /dev/null +++ b/drivers/usb/host/mausb/utils.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019 - 2020 DisplayLink (UK) Ltd. + */ +#ifndef __MAUSB_UTILS_H__ +#define __MAUSB_UTILS_H__ + +#include <linux/miscdevice.h> + +extern struct miscdevice mausb_host_dev; + +int mausb_host_dev_register(void); +void mausb_host_dev_deregister(void); + +#endif /* __MAUSB_UTILS_H__ */ -- 2.17.1
