path: root/drivers/isdn/gigaset/gigaset.h

/*
 * Siemens Gigaset 307x driver
 * Common header file for all connection variants
 *
 * Written by Stefan Eilers
 *        and Hansjoerg Lipp <hjlipp@web.de>
 *
 * =====================================================================
 *	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.
 * =====================================================================
 */

#ifndef GIGASET_H
#define GIGASET_H

/* define global prefix for pr_ macros in linux/kernel.h */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ppp_defs.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/list.h>
#include <linux/atomic.h>

#define GIG_VERSION {0, 5, 0, 0}
#define GIG_COMPAT  {0, 4, 0, 0}

#define MAX_REC_PARAMS 10	/* Max. number of params in response string */
#define MAX_RESP_SIZE 511	/* Max. size of a response string */

#define MAX_EVENTS 64		/* size of event queue */

#define RBUFSIZE 8192

#define GIG_TICK 100		/* in milliseconds */

/* timeout values (unit: 1 sec) */
#define INIT_TIMEOUT 1

/* timeout values (unit: 0.1 sec) */
#define RING_TIMEOUT 3		/* for additional parameters to RING */
#define BAS_TIMEOUT 20		/* for response to Base USB ops */
#define ATRDY_TIMEOUT 3		/* for HD_READY_SEND_ATDATA */

#define BAS_RETRY 3		/* max. retries for base USB ops */

#define MAXACT 3

extern int gigaset_debuglevel;	/* "needs" cast to (enum debuglevel) */

/* debug flags, combine by adding/bitwise OR */
enum debuglevel {
	DEBUG_INTR	  = 0x00008, /* interrupt processing */
	DEBUG_CMD	  = 0x00020, /* sent/received LL commands */
	DEBUG_STREAM	  = 0x00040, /* application data stream I/O events */
	DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
	DEBUG_LLDATA	  = 0x00100, /* sent/received LL data */
	DEBUG_EVENT	  = 0x00200, /* event processing */
	DEBUG_HDLC	  = 0x00800, /* M10x HDLC processing */
	DEBUG_CHANNEL	  = 0x01000, /* channel allocation/deallocation */
	DEBUG_TRANSCMD	  = 0x02000, /* AT-COMMANDS+RESPONSES */
	DEBUG_MCMD	  = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
	DEBUG_INIT	  = 0x08000, /* (de)allocation+initialization of data
					structures */
	DEBUG_SUSPEND	  = 0x10000, /* suspend/resume processing */
	DEBUG_OUTPUT	  = 0x20000, /* output to device */
	DEBUG_ISO	  = 0x40000, /* isochronous transfers */
	DEBUG_IF	  = 0x80000, /* character device operations */
	DEBUG_USBREQ	  = 0x100000, /* USB communication (except payload
					 data) */
	DEBUG_LOCKCMD	  = 0x200000, /* AT commands and responses when
					 MS_LOCKED */

	DEBUG_ANY	  = 0x3fffff, /* print message if any of the others is
					 activated */
};

#ifdef CONFIG_GIGASET_DEBUG

#define gig_dbg(level, format, arg...)					\
	do {								\
		if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
			printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
			       ## arg);					\
	} while (0)
#define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)

#else

#define gig_dbg(level, format, arg...) do {} while (0)
#define DEBUG_DEFAULT 0

#endif

void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
			size_t len, const unsigned char *buf);

/* connection state */
#define ZSAU_NONE			0
#define ZSAU_PROCEEDING			1
#define ZSAU_CALL_DELIVERED		2
#define ZSAU_ACTIVE			3
#define ZSAU_DISCONNECT_IND		4
#define ZSAU_NULL			5
#define ZSAU_DISCONNECT_REQ		6
#define ZSAU_UNKNOWN			-1

/* USB control transfer requests */
#define OUT_VENDOR_REQ	(USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
#define IN_VENDOR_REQ	(USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)

/* interrupt pipe messages */
#define HD_B1_FLOW_CONTROL		0x80
#define HD_B2_FLOW_CONTROL		0x81
#define HD_RECEIVEATDATA_ACK		(0x35)		/* 3070 */
#define HD_READY_SEND_ATDATA		(0x36)		/* 3070 */
#define HD_OPEN_ATCHANNEL_ACK		(0x37)		/* 3070 */
#define HD_CLOSE_ATCHANNEL_ACK		(0x38)		/* 3070 */
#define HD_DEVICE_INIT_OK		(0x11)		/* ISurf USB + 3070 */
#define HD_OPEN_B1CHANNEL_ACK		(0x51)		/* ISurf USB + 3070 */
#define HD_OPEN_B2CHANNEL_ACK		(0x52)		/* ISurf USB + 3070 */
#define HD_CLOSE_B1CHANNEL_ACK		(0x53)		/* ISurf USB + 3070 */
#define HD_CLOSE_B2CHANNEL_ACK		(0x54)		/* ISurf USB + 3070 */
#define HD_SUSPEND_END			(0x61)		/* ISurf USB */
#define HD_RESET_INTERRUPT_PIPE_ACK	(0xFF)		/* ISurf USB + 3070 */

/* control requests */
#define	HD_OPEN_B1CHANNEL		(0x23)		/* ISurf USB + 3070 */
#define	HD_CLOSE_B1CHANNEL		(0x24)		/* ISurf USB + 3070 */
#define	HD_OPEN_B2CHANNEL		(0x25)		/* ISurf USB + 3070 */
#define	HD_CLOSE_B2CHANNEL		(0x26)		/* ISurf USB + 3070 */
#define HD_RESET_INTERRUPT_PIPE		(0x27)		/* ISurf USB + 3070 */
#define	HD_DEVICE_INIT_ACK		(0x34)		/* ISurf USB + 3070 */
#define	HD_WRITE_ATMESSAGE		(0x12)		/* 3070 */
#define	HD_READ_ATMESSAGE		(0x13)		/* 3070 */
#define	HD_OPEN_ATCHANNEL		(0x28)		/* 3070 */
#define	HD_CLOSE_ATCHANNEL		(0x29)		/* 3070 */

/* number of B channels supported by base driver */
#define BAS_CHANNELS	2

/* USB frames for isochronous transfer */
#define BAS_FRAMETIME	1	/* number of milliseconds between frames */
#define BAS_NUMFRAMES	8	/* number of frames per URB */
#define BAS_MAXFRAME	16	/* allocated bytes per frame */
#define BAS_NORMFRAME	8	/* send size without flow control */
#define BAS_HIGHFRAME	10	/* "    "    with positive flow control */
#define BAS_LOWFRAME	5	/* "    "    with negative flow control */
#define BAS_CORRFRAMES	4	/* flow control multiplicator */

#define BAS_INBUFSIZE	(BAS_MAXFRAME * BAS_NUMFRAMES)	/* size of isoc in buf
							 * per URB */
#define BAS_OUTBUFSIZE	4096		/* size of common isoc out buffer */
#define BAS_OUTBUFPAD	BAS_MAXFRAME	/* size of pad area for isoc out buf */

#define BAS_INURBS	3
#define BAS_OUTURBS	3

/* variable commands in struct bc_state */
#define AT_ISO		0
#define AT_DIAL		1
#define AT_MSN		2
#define AT_BC		3
#define AT_PROTO	4
#define AT_TYPE		5
#define AT_CLIP		6
/* total number */
#define AT_NUM		7

/* variables in struct at_state_t */
/* - numeric */
#define VAR_ZSAU	0
#define VAR_ZDLE	1
#define VAR_ZCTP	2
/* total number */
#define VAR_NUM		3
/* - string */
#define STR_NMBR	0
#define STR_ZCPN	1
#define STR_ZCON	2
#define STR_ZBC		3
#define STR_ZHLC	4
/* total number */
#define STR_NUM		5

/* event types */
#define EV_TIMEOUT	-105
#define EV_IF_VER	-106
#define EV_PROC_CIDMODE	-107
#define EV_SHUTDOWN	-108
#define EV_START	-110
#define EV_STOP		-111
#define EV_IF_LOCK	-112
#define EV_ACCEPT	-114
#define EV_DIAL		-115
#define EV_HUP		-116
#define EV_BC_OPEN	-117
#define EV_BC_CLOSED	-118

/* input state */
#define INS_command	0x0001	/* receiving messages (not payload data) */
#define INS_DLE_char	0x0002	/* DLE flag received (in DLE mode) */
#define INS_byte_stuff	0x0004
#define INS_have_data	0x0008
#define INS_DLE_command	0x0020	/* DLE message start (<DLE> X) received */
#define INS_flag_hunt	0x0040

/* channel state */
#define CHS_D_UP	0x01
#define CHS_B_UP	0x02
#define CHS_NOTIFY_LL	0x04

#define ICALL_REJECT	0
#define ICALL_ACCEPT	1
#define ICALL_IGNORE	2

/* device state */
#define MS_UNINITIALIZED	0
#define MS_INIT			1
#define MS_LOCKED		2
#define MS_SHUTDOWN		3
#define MS_RECOVER		4
#define MS_READY		5

/* mode */
#define M_UNKNOWN	0
#define M_CONFIG	1
#define M_UNIMODEM	2
#define M_CID		3

/* start mode */
#define SM_LOCKED	0
#define SM_ISDN		1 /* default */

/* layer 2 protocols (AT^SBPR=...) */
#define L2_BITSYNC	0
#define L2_HDLC		1
#define L2_VOICE	2

struct gigaset_ops;
struct gigaset_driver;

struct usb_cardstate;
struct ser_cardstate;
struct bas_cardstate;

struct bc_state;
struct usb_bc_state;
struct ser_bc_state;
struct bas_bc_state;

struct reply_t {
	int	resp_code;	/* RSP_XXXX */
	int	min_ConState;	/* <0 => ignore */
	int	max_ConState;	/* <0 => ignore */
	int	parameter;	/* e.g. ZSAU_XXXX <0: ignore*/
	int	new_ConState;	/* <0 => ignore */
	int	timeout;	/* >0 => *HZ; <=0 => TOUT_XXXX*/
	int	action[MAXACT];	/* ACT_XXXX */
	char	*command;	/* NULL==none */
};

extern struct reply_t gigaset_tab_cid[];
extern struct reply_t gigaset_tab_nocid[];

struct inbuf_t {
	struct cardstate	*cs;
	int			inputstate;
	int			head, tail;
	unsigned char		data[RBUFSIZE];
};

/* isochronous write buffer structure
 * circular buffer with pad area for extraction of complete USB frames
 * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 * - data[nextread..write-1] is valid data yet to be sent
 * - data[write] is the next byte to write to
 *   - in byte-oriented L2 procotols, it is completely free
 *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 * - data[write+1..read-1] is free
 * - wbits is the number of valid data bits in data[write], starting at the LSB
 * - writesem is the semaphore for writing to the buffer:
 *   if writesem <= 0, data[write..read-1] is currently being written to
 * - idle contains the byte value to repeat when the end of valid data is
 *   reached; if nextread==write (buffer contains no data to send), either the
 *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 *   are also filled with that value
 */
struct isowbuf_t {
	int		read;
	int		nextread;
	int		write;
	atomic_t	writesem;
	int		wbits;
	unsigned char	data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
	unsigned char	idle;
};

/* isochronous write URB context structure
 * data to be stored along with the URB and retrieved when it is returned
 * as completed by the USB subsystem
 * - urb: pointer to the URB itself
 * - bcs: pointer to the B Channel control structure
 * - limit: end of write buffer area covered by this URB
 * - status: URB completion status
 */
struct isow_urbctx_t {
	struct urb *urb;
	struct bc_state *bcs;
	int limit;
	int status;
};

/* AT state structure
 * data associated with the state of an ISDN connection, whether or not
 * it is currently assigned a B channel
 */
struct at_state_t {
	struct list_head	list;
	int			waiting;
	int			getstring;
	unsigned		timer_inde