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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
* Copyright (C) 2015-2016 Samsung Electronics
* Igor Kotrasinski <i.kotrasinsk@samsung.com>
* Krzysztof Opasiak <k.opasiak@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __USBIP_VUDC_H
#define __USBIP_VUDC_H
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb/gadget.h>
#include <linux/usb/ch9.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/time.h>
#include <linux/sysfs.h>
#include "usbip_common.h"
#define GADGET_NAME "usbip-vudc"
struct vep {
struct usb_ep ep;
unsigned type:2; /* type, as USB_ENDPOINT_XFER_* */
char name[8]; /* space for ep name */
const struct usb_endpoint_descriptor *desc;
struct usb_gadget *gadget;
struct list_head req_queue; /* Request queue */
unsigned halted:1;
unsigned wedged:1;
unsigned already_seen:1;
unsigned setup_stage:1;
};
struct vrequest {
struct usb_request req;
struct vudc *udc;
struct list_head req_entry; /* Request queue */
};
struct urbp {
struct urb *urb;
struct vep *ep;
struct list_head urb_entry; /* urb queue */
unsigned long seqnum;
unsigned type:2; /* for tx, since ep type can change after */
unsigned new:1;
};
struct v_unlink {
unsigned long seqnum;
__u32 status;
};
enum tx_type {
TX_UNLINK,
TX_SUBMIT,
};
struct tx_item {
struct list_head tx_entry;
enum tx_type type;
union {
struct urbp *s;
struct v_unlink *u;
};
};
enum tr_state {
VUDC_TR_RUNNING,
VUDC_TR_IDLE,
VUDC_TR_STOPPED,
};
struct transfer_timer {
struct timer_list timer;
enum tr_state state;
unsigned long frame_start;
int frame_limit;
};
struct vudc {
struct usb_gadget gadget;
struct usb_gadget_driver *driver;
struct platform_device *pdev;
struct usb_device_descriptor dev_desc;
struct usbip_device ud;
struct transfer_timer tr_timer;
struct timeval start_time;
struct list_head urb_queue;
spinlock_t lock_tx;
struct list_head tx_queue;
wait_queue_head_t tx_waitq;
spinlock_t lock;
struct vep *ep;
int address;
u16 devstatus;
unsigned pullup:1;
unsigned connected:1;
unsigned desc_cached:1;
};
struct vudc_device {
struct platform_device *pdev;
struct list_head dev_entry;
};
extern const struct attribute_group vudc_attr_group;
/* visible everywhere */
static inline struct vep *to_vep(struct usb_ep *_ep)
{
return container_of(_ep, struct vep, ep);
}
static inline struct vrequest *to_vrequest(
struct usb_request *_req)
{
return container_of(_req, struct vrequest, req);
}
static inline struct vudc *usb_gadget_to_vudc(
struct usb_gadget *_gadget)
{
return container_of(_gadget, struct vudc, gadget);
}
static inline struct vudc *ep_to_vudc(struct vep *ep)
{
return container_of(ep->gadget, struct vudc, gadget);
}
/* vudc_sysfs.c */
int get_gadget_descs(struct vudc *udc);
/* vudc_tx.c */
int v_tx_loop(void *data);
void v_enqueue_ret_unlink(struct vudc *udc, __u32 seqnum, __u32 status);
void v_enqueue_ret_submit(struct vudc *udc, struct urbp *urb_p);
/* vudc_rx.c */
int v_rx_loop(void *data);
/* vudc_transfer.c */
void v_init_timer(struct vudc *udc);
void v_start_timer(struct vudc *udc);
void v_kick_timer(struct vudc *udc, unsigned long time);
void v_stop_timer(struct vudc *udc);
/* vudc_dev.c */
struct urbp *alloc_urbp(void);
void free_urbp_and_urb(struct urbp *urb_p);
struct vep *vudc_find_endpoint(struct vudc *udc, u8 address);
struct vudc_device *alloc_vudc_device(int devid);
void put_vudc_device(struct vudc_device *udc_dev);
int vudc_probe(struct platform_device *pdev);
int vudc_remove(struct platform_device *pdev);
#endif /* __USBIP_VUDC_H */
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