mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
e2de257cf1
Cleanups done to use min/max macros from kernel.h. Handcrafted MIN/MAX macros are changed to use macros in kernel.h [akpm@osdl.org: warning fix] Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
227 lines
6.4 KiB
C
227 lines
6.4 KiB
C
|
|
/*
|
|
*
|
|
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 pice 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 /* } */
|