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path: root/drivers/isdn/hardware/eicon/istream.c
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Diffstat (limited to 'drivers/isdn/hardware/eicon/istream.c')
-rw-r--r--drivers/isdn/hardware/eicon/istream.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/eicon/istream.c b/drivers/isdn/hardware/eicon/istream.c
new file mode 100644
index 000000000..045bda5c8
--- /dev/null
+++ b/drivers/isdn/hardware/eicon/istream.c
@@ -0,0 +1,226 @@
+
+/*
+ *
+ 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 /* } */
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