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/* Copyright (c) 2011-2014, 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.
*/
#ifndef __RMNET_USB_H
#define __RMNET_USB_H
#include <linux/mutex.h>
#include <linux/usb.h>
#include <linux/cdev.h>
#include <linux/usb/ch9.h>
#include <linux/usb/cdc.h>
#define MAX_RMNET_DEVS 4
#define MAX_RMNET_INSTS_PER_DEV 17
#define TOTAL_RMNET_DEV_COUNT (MAX_RMNET_DEVS * MAX_RMNET_INSTS_PER_DEV)
#define CTRL_DEV_MAX_LEN 10
#define RMNET_CTRL_DEV_OPEN 0
#define RMNET_CTRL_DEV_READY 1
#define RMNET_CTRL_DEV_MUX_EN 2
/*data MUX header bit mask*/
#define MUX_PAD_SHIFT 0x2
/*big endian format ctrl MUX header bit masks*/
#define MUX_CTRL_PADLEN_MASK 0x3F
#define MUX_CTRL_MASK 0x80
/*max padding bytes for n byte alignment*/
#define MAX_PAD_BYTES(n) (n-1)
/*
*MUX Header big endian Format
*BIT 0 - 5 : Pad bytes
*BIT 6: Reserved
*BIT 7: Mux type 0: Data, 1: control
*BIT 8-15: Mux ID
*BIT 16-31: PACKET_LEN_WITH_PADDING (Bytes)
*/
struct mux_hdr {
__u8 padding_info;
__u8 mux_id;
__u16 pkt_len_w_padding;
} __packed;
struct rmnet_ctrl_udev {
/*
* In case of non-mux ctrl channel there is a one to one mapping
* between rmnet_ctrl_dev and rmnet_ctrl_udev. Save the claimed
* device id.
*/
unsigned int ctrldev_id;
unsigned int rdev_num;
struct usb_interface *intf;
unsigned int int_pipe;
struct urb *rcvurb;
struct urb *inturb;
struct usb_anchor tx_submitted;
struct usb_anchor rx_submitted;
void *rcvbuf;
void *intbuf;
struct usb_ctrlrequest *in_ctlreq;
struct workqueue_struct *wq;
struct work_struct get_encap_work;
unsigned long status;
/*counters*/
unsigned int snd_encap_cmd_cnt;
unsigned int get_encap_resp_cnt;
unsigned int resp_avail_cnt;
unsigned int get_encap_failure_cnt;
unsigned int set_ctrl_line_state_cnt;
unsigned int tx_ctrl_err_cnt;
unsigned int zlp_cnt;
unsigned int invalid_mux_id_cnt;
unsigned int ignore_encap_work;
bool autosuspend_disabled;
unsigned int autosuspend_en_cnt;
unsigned int autosuspend_dis_cnt;
};
struct rmnet_ctrl_dev {
/*for debugging purpose*/
char name[CTRL_DEV_MAX_LEN];
struct cdev cdev;
struct device *devicep;
unsigned ch_id;
struct rmnet_ctrl_udev *cudev;
spinlock_t rx_lock;
struct mutex dev_lock;
struct list_head rx_list;
wait_queue_head_t read_wait_queue;
wait_queue_head_t open_wait_queue;
unsigned long status;
bool claimed;
bool poll_err;
unsigned int mdm_wait_timeout;
/*input control lines (DSR, CTS, CD, RI)*/
unsigned int cbits_tolocal;
/*output control lines (DTR, RTS)*/
unsigned int cbits_tomdm;
};
extern struct workqueue_struct *usbnet_wq;
extern int rmnet_usb_ctrl_start_rx(struct rmnet_ctrl_udev *);
extern int rmnet_usb_ctrl_suspend(struct rmnet_ctrl_udev *dev);
extern int rmnet_usb_ctrl_init(int num_devs, int insts_per_dev,
unsigned long mux_info);
extern void rmnet_usb_ctrl_exit(int num_devs, int insts_per_dev,
unsigned long mux_info);
extern int rmnet_usb_ctrl_probe(struct usb_interface *intf,
struct usb_host_endpoint *int_in,
unsigned long rmnet_devnum,
unsigned long *data);
extern void rmnet_usb_ctrl_disconnect(struct rmnet_ctrl_udev *);
#endif /* __RMNET_USB_H*/
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