usb: gadget: Add snapshot of USB BAM DMUX driver

/* Copyright (c) 2011-2012, 2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * 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.

 */

#include <linux/types.h>

#include <linux/skbuff.h>

#ifndef _BAM_DMUX_H

#define _BAM_DMUX_H

#define BAM_DMUX_CH_NAME_MAX_LEN	20

enum {

	BAM_DMUX_DATA_RMNET_0,

	BAM_DMUX_DATA_RMNET_1,

	BAM_DMUX_DATA_RMNET_2,

	BAM_DMUX_DATA_RMNET_3,

	BAM_DMUX_DATA_RMNET_4,

	BAM_DMUX_DATA_RMNET_5,

	BAM_DMUX_DATA_RMNET_6,

	BAM_DMUX_DATA_RMNET_7,

	BAM_DMUX_USB_RMNET_0,

	BAM_DMUX_RESERVED_0, /* 9..11 are reserved*/

	BAM_DMUX_RESERVED_1,

	BAM_DMUX_RESERVED_2,

	BAM_DMUX_DATA_REV_RMNET_0,

	BAM_DMUX_DATA_REV_RMNET_1,

	BAM_DMUX_DATA_REV_RMNET_2,

	BAM_DMUX_DATA_REV_RMNET_3,

	BAM_DMUX_DATA_REV_RMNET_4,

	BAM_DMUX_DATA_REV_RMNET_5,

	BAM_DMUX_DATA_REV_RMNET_6,

	BAM_DMUX_DATA_REV_RMNET_7,

	BAM_DMUX_DATA_REV_RMNET_8,

	BAM_DMUX_USB_DPL,

	BAM_DMUX_NUM_CHANNELS

};

/* event type enum */

enum {

	BAM_DMUX_RECEIVE, /* data is struct sk_buff */

	BAM_DMUX_WRITE_DONE, /* data is struct sk_buff */

	BAM_DMUX_UL_CONNECTED, /* data is null */

	BAM_DMUX_UL_DISCONNECTED, /*data is null */

	BAM_DMUX_TRANSMIT_SIZE, /* data is maximum negotiated transmit MTU */

};

/*

 * Open a bam_dmux logical channel

 *     id - the logical channel to open

 *     priv - private data pointer to be passed to the notify callback

 *     notify - event callback function

 *          priv - private data pointer passed to msm_bam_dmux_open()

 *          event_type - type of event

 *          data - data relevant to event.  May not be valid. See event_type

 *                    enum for valid cases.

 */

#ifdef CONFIG_MSM_BAM_DMUX

int msm_bam_dmux_open(uint32_t id, void *priv,

		       void (*notify)(void *priv, int event_type,

						unsigned long data));

int msm_bam_dmux_close(uint32_t id);

int msm_bam_dmux_write(uint32_t id, struct sk_buff *skb);

int msm_bam_dmux_kickoff_ul_wakeup(void);

int msm_bam_dmux_ul_power_vote(void);

int msm_bam_dmux_ul_power_unvote(void);

int msm_bam_dmux_is_ch_full(uint32_t id);

int msm_bam_dmux_is_ch_low(uint32_t id);

int msm_bam_dmux_reg_notify(void *priv,

		       void (*notify)(void *priv, int event_type,

						unsigned long data));

#else

static inline int msm_bam_dmux_open(uint32_t id, void *priv,

		       void (*notify)(void *priv, int event_type,

						unsigned long data))

{

	return -ENODEV;

}

static inline int msm_bam_dmux_close(uint32_t id)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_write(uint32_t id, struct sk_buff *skb)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_kickoff_ul_wakeup(void)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_ul_power_vote(void)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_ul_power_unvote(void)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_is_ch_full(uint32_t id)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_is_ch_low(uint32_t id)

{

	return -ENODEV;

}

static inline int msm_bam_dmux_reg_notify(void *priv,

		       void (*notify)(void *priv, int event_type,

						unsigned long data))

{

	return -ENODEV;

}

#endif

#endif /* _BAM_DMUX_H */