drivers/isdn/hardware/eicon/istream.c - third_party/linux - Git at Google


 /*
  *
  Copyright (c) Eicon Networks, 2002.
  *
  This source file is supplied for the use with
  Eicon Networks range of DIVA Server Adapters.
  *
  Eicon File Revision :    2.1
  *
  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, or (at your option)
  any later version.
  *
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
  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, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
 #include "platform.h"
 #if defined(DIVA_ISTREAM) /* { */
 #include "pc.h"
 #include "pr_pc.h"
 #include "di_defs.h"
 #include "divasync.h"
 #include "di.h"
 #if !defined USE_EXTENDED_DEBUGS
 #include "dimaint.h"
 #else
 #define dprintf
 #endif
 #include "dfifo.h"
 int diva_istream_write(void *context,
 		       int   Id,
 		       void *data,
 		       int length,
 		       int final,
 		       byte usr1,
 		       byte usr2);
 int diva_istream_read(void *context,
 		      int Id,
 		      void *data,
 		      int max_length,
 		      int *final,
 		      byte *usr1,
 		      byte *usr2);
 /* -------------------------------------------------------------------
    Does provide iStream interface to the client
    ------------------------------------------------------------------- */
 void diva_xdi_provide_istream_info(ADAPTER *a,
 				   diva_xdi_stream_interface_t *pi) {
 	pi->provided_service = 0;
 }
 /* ------------------------------------------------------------------
    Does write the data from caller's buffer to the card's
    stream interface.
    If synchronous service was requested, then function
    does return amount of data written to stream.
    'final' does indicate that piece of data to be written is
    final part of frame (necessary only by structured datatransfer)
    return  0 if zero lengh packet was written
    return -1 if stream is full
    ------------------------------------------------------------------ */
 int diva_istream_write(void *context,
 		       int Id,
 		       void *data,
 		       int length,
 		       int final,
 		       byte usr1,
 		       byte usr2) {
 	ADAPTER *a = (ADAPTER *)context;
 	int written = 0, to_write = -1;
 	char tmp[4];
 	byte *data_ptr = (byte *)data;
 	for (;;) {
 		a->ram_in_dw(a,
 #ifdef PLATFORM_GT_32BIT
 			      ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id]),
 #else
 			      (void *)(a->tx_stream[Id] + a->tx_pos[Id]),
 #endif
 			      (dword *)&tmp[0],
 			      1);
 		if (tmp[0] & DIVA_DFIFO_READY) { /* No free blocks more */
 			if (to_write < 0)
 				return (-1); /* was not able to write       */
 			break;     /* only part of message was written */
 		}
 		to_write = min(length, DIVA_DFIFO_DATA_SZ);
 		if (to_write) {
 			a->ram_out_buffer(a,
 #ifdef PLATFORM_GT_32BIT
 					   ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id] + 4),
 #else
 					   (void *)(a->tx_stream[Id] + a->tx_pos[Id] + 4),
 #endif
 					   data_ptr,
 					   (word)to_write);
 			length  -= to_write;
 			written  += to_write;
 			data_ptr += to_write;
 		}
 		tmp[1] = (char)to_write;
 		tmp[0] = (tmp[0] & DIVA_DFIFO_WRAP) |
 			DIVA_DFIFO_READY |
 			((!length && final) ? DIVA_DFIFO_LAST : 0);
 		if (tmp[0] & DIVA_DFIFO_LAST) {
 			tmp[2] = usr1;
 			tmp[3] = usr2;
 		}
 		a->ram_out_dw(a,
 #ifdef PLATFORM_GT_32BIT
 			       ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id]),
 #else
 			       (void *)(a->tx_stream[Id] + a->tx_pos[Id]),
 #endif
 			       (dword *)&tmp[0],
 			       1);
 		if (tmp[0] & DIVA_DFIFO_WRAP) {
 			a->tx_pos[Id]  = 0;
 		} else {
 			a->tx_pos[Id] += DIVA_DFIFO_STEP;
 		}
 		if (!length) {
 			break;
 		}
 	}
 	return (written);
 }
 /* -------------------------------------------------------------------
    In case of SYNCRONOUS service:
    Does write data from stream in caller's buffer.
    Does return amount of data written to buffer
    Final flag is set on return if last part of structured frame
    was received
    return 0  if zero packet was received
    return -1 if stream is empty
    return -2 if read buffer does not profide sufficient space
    to accommodate entire segment
    max_length should be at least 68 bytes
    ------------------------------------------------------------------- */
 int diva_istream_read(void *context,
 		      int Id,
 		      void *data,
 		      int max_length,
 		      int *final,
 		      byte *usr1,
 		      byte *usr2) {
 	ADAPTER *a = (ADAPTER *)context;
 	int read = 0, to_read = -1;
 	char tmp[4];
 	byte *data_ptr = (byte *)data;
 	*final = 0;
 	for (;;) {
 		a->ram_in_dw(a,
 #ifdef PLATFORM_GT_32BIT
 			      ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id]),
 #else
 			      (void *)(a->rx_stream[Id] + a->rx_pos[Id]),
 #endif
 			      (dword *)&tmp[0],
 			      1);
 		if (tmp[1] > max_length) {
 			if (to_read < 0)
 				return (-2); /* was not able to read */
 			break;
 		}
 		if (!(tmp[0] & DIVA_DFIFO_READY)) {
 			if (to_read < 0)
 				return (-1); /* was not able to read */
 			break;
 		}
 		to_read = min(max_length, (int)tmp[1]);
 		if (to_read) {
 			a->ram_in_buffer(a,
 #ifdef PLATFORM_GT_32BIT
 					 ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id] + 4),
 #else
 					 (void *)(a->rx_stream[Id] + a->rx_pos[Id] + 4),
 #endif
 					 data_ptr,
 					 (word)to_read);
 			max_length -= to_read;
 			read     += to_read;
 			data_ptr  += to_read;
 		}
 		if (tmp[0] & DIVA_DFIFO_LAST) {
 			*final = 1;
 		}
 		tmp[0] &= DIVA_DFIFO_WRAP;
 		a->ram_out_dw(a,
 #ifdef PLATFORM_GT_32BIT
 			      ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id]),
 #else
 			      (void *)(a->rx_stream[Id] + a->rx_pos[Id]),
 #endif
 			      (dword *)&tmp[0],
 			      1);
 		if (tmp[0] & DIVA_DFIFO_WRAP) {
 			a->rx_pos[Id]  = 0;
 		} else {
 			a->rx_pos[Id] += DIVA_DFIFO_STEP;
 		}
 		if (*final) {
 			if (usr1)
 				*usr1 = tmp[2];
 			if (usr2)
 				*usr2 = tmp[3];
 			break;
 		}
 	}
 	return (read);
 }
 /* ---------------------------------------------------------------------
    Does check if one of streams had caused interrupt and does
    wake up corresponding application
    --------------------------------------------------------------------- */
 void pr_stream(ADAPTER *a) {
 }
 #endif /* } */

	/*
	*
	Copyright (c) Eicon Networks, 2002.
	*
	This source file is supplied for the use with
	Eicon Networks range of DIVA Server Adapters.
	*
	Eicon File Revision : 2.1
	*
	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, or (at your option)
	any later version.
	*
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
	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, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	*/
	#include "platform.h"
	#if defined(DIVA_ISTREAM) /* { */
	#include "pc.h"
	#include "pr_pc.h"
	#include "di_defs.h"
	#include "divasync.h"
	#include "di.h"
	#if !defined USE_EXTENDED_DEBUGS
	#include "dimaint.h"
	#else
	#define dprintf
	#endif
	#include "dfifo.h"
	int diva_istream_write(void *context,
	int Id,
	void *data,
	int length,
	int final,
	byte usr1,
	byte usr2);
	int diva_istream_read(void *context,
	int Id,
	void *data,
	int max_length,
	int *final,
	byte *usr1,
	byte *usr2);
	/* -------------------------------------------------------------------
	Does provide iStream interface to the client
	------------------------------------------------------------------- */
	void diva_xdi_provide_istream_info(ADAPTER *a,
	diva_xdi_stream_interface_t *pi) {
	pi->provided_service = 0;
	}
	/* ------------------------------------------------------------------
	Does write the data from caller's buffer to the card's
	stream interface.
	If synchronous service was requested, then function
	does return amount of data written to stream.
	'final' does indicate that piece of data to be written is
	final part of frame (necessary only by structured datatransfer)
	return 0 if zero lengh packet was written
	return -1 if stream is full
	------------------------------------------------------------------ */
	int diva_istream_write(void *context,
	int Id,
	void *data,
	int length,
	int final,
	byte usr1,
	byte usr2) {
	ADAPTER a = (ADAPTER )context;
	int written = 0, to_write = -1;
	char tmp[4];
	byte data_ptr = (byte )data;
	for (;;) {
	a->ram_in_dw(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id]),
	#else
	(void *)(a->tx_stream[Id] + a->tx_pos[Id]),
	#endif
	(dword *)&tmp[0],
	1);
	if (tmp[0] & DIVA_DFIFO_READY) { /* No free blocks more */
	if (to_write < 0)
	return (-1); /* was not able to write */
	break; /* only part of message was written */
	}
	to_write = min(length, DIVA_DFIFO_DATA_SZ);
	if (to_write) {
	a->ram_out_buffer(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id] + 4),
	#else
	(void *)(a->tx_stream[Id] + a->tx_pos[Id] + 4),
	#endif
	data_ptr,
	(word)to_write);
	length -= to_write;
	written += to_write;
	data_ptr += to_write;
	}
	tmp[1] = (char)to_write;
	tmp[0] = (tmp[0] & DIVA_DFIFO_WRAP) \|
	DIVA_DFIFO_READY \|
	((!length && final) ? DIVA_DFIFO_LAST : 0);
	if (tmp[0] & DIVA_DFIFO_LAST) {
	tmp[2] = usr1;
	tmp[3] = usr2;
	}
	a->ram_out_dw(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->tx_stream[Id] + a->tx_pos[Id]),
	#else
	(void *)(a->tx_stream[Id] + a->tx_pos[Id]),
	#endif
	(dword *)&tmp[0],
	1);
	if (tmp[0] & DIVA_DFIFO_WRAP) {
	a->tx_pos[Id] = 0;
	} else {
	a->tx_pos[Id] += DIVA_DFIFO_STEP;
	}
	if (!length) {
	break;
	}
	}
	return (written);
	}
	/* -------------------------------------------------------------------
	In case of SYNCRONOUS service:
	Does write data from stream in caller's buffer.
	Does return amount of data written to buffer
	Final flag is set on return if last part of structured frame
	was received
	return 0 if zero packet was received
	return -1 if stream is empty
	return -2 if read buffer does not profide sufficient space
	to accommodate entire segment
	max_length should be at least 68 bytes
	------------------------------------------------------------------- */
	int diva_istream_read(void *context,
	int Id,
	void *data,
	int max_length,
	int *final,
	byte *usr1,
	byte *usr2) {
	ADAPTER a = (ADAPTER )context;
	int read = 0, to_read = -1;
	char tmp[4];
	byte data_ptr = (byte )data;
	*final = 0;
	for (;;) {
	a->ram_in_dw(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id]),
	#else
	(void *)(a->rx_stream[Id] + a->rx_pos[Id]),
	#endif
	(dword *)&tmp[0],
	1);
	if (tmp[1] > max_length) {
	if (to_read < 0)
	return (-2); /* was not able to read */
	break;
	}
	if (!(tmp[0] & DIVA_DFIFO_READY)) {
	if (to_read < 0)
	return (-1); /* was not able to read */
	break;
	}
	to_read = min(max_length, (int)tmp[1]);
	if (to_read) {
	a->ram_in_buffer(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id] + 4),
	#else
	(void *)(a->rx_stream[Id] + a->rx_pos[Id] + 4),
	#endif
	data_ptr,
	(word)to_read);
	max_length -= to_read;
	read += to_read;
	data_ptr += to_read;
	}
	if (tmp[0] & DIVA_DFIFO_LAST) {
	*final = 1;
	}
	tmp[0] &= DIVA_DFIFO_WRAP;
	a->ram_out_dw(a,
	#ifdef PLATFORM_GT_32BIT
	ULongToPtr(a->rx_stream[Id] + a->rx_pos[Id]),
	#else
	(void *)(a->rx_stream[Id] + a->rx_pos[Id]),
	#endif
	(dword *)&tmp[0],
	1);
	if (tmp[0] & DIVA_DFIFO_WRAP) {
	a->rx_pos[Id] = 0;
	} else {
	a->rx_pos[Id] += DIVA_DFIFO_STEP;
	}
	if (*final) {
	if (usr1)
	*usr1 = tmp[2];
	if (usr2)
	*usr2 = tmp[3];
	break;
	}
	}
	return (read);
	}
	/* ---------------------------------------------------------------------
	Does check if one of streams had caused interrupt and does
	wake up corresponding application
	--------------------------------------------------------------------- */
	void pr_stream(ADAPTER *a) {
	}
	#endif /* } */