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path: root/drivers/isdn/i4l/isdn_v110.c
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Diffstat (limited to 'drivers/isdn/i4l/isdn_v110.c')
-rw-r--r--drivers/isdn/i4l/isdn_v110.c294
1 files changed, 147 insertions, 147 deletions
diff --git a/drivers/isdn/i4l/isdn_v110.c b/drivers/isdn/i4l/isdn_v110.c
index c5d02b6aafab..52827a80c51f 100644
--- a/drivers/isdn/i4l/isdn_v110.c
+++ b/drivers/isdn/i4l/isdn_v110.c
@@ -26,8 +26,8 @@ char *isdn_v110_revision = "$Revision: 1.1.2.2 $";
#define V110_19200 15
#define V110_9600 3
-/*
- * The following data are precoded matrices, online and offline matrix
+/*
+ * The following data are precoded matrices, online and offline matrix
* for 9600, 19200 und 38400, respectively
*/
static unsigned char V110_OnMatrix_9600[] =
@@ -56,7 +56,7 @@ static unsigned char V110_OnMatrix_38400[] =
static unsigned char V110_OffMatrix_38400[] =
{0x00, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff};
-/*
+/*
* FlipBits reorders sequences of keylen bits in one byte.
* E.g. source order 7654321 will be converted to 45670123 when keylen = 4,
* and to 67452301 when keylen = 2. This is necessary because ordering on
@@ -103,18 +103,18 @@ isdn_v110_open(unsigned char key, int hdrlen, int maxsize)
v->decodelen = 0;
switch (key) {
- case V110_38400:
- v->OnlineFrame = V110_OnMatrix_38400;
- v->OfflineFrame = V110_OffMatrix_38400;
- break;
- case V110_19200:
- v->OnlineFrame = V110_OnMatrix_19200;
- v->OfflineFrame = V110_OffMatrix_19200;
- break;
- default:
- v->OnlineFrame = V110_OnMatrix_9600;
- v->OfflineFrame = V110_OffMatrix_9600;
- break;
+ case V110_38400:
+ v->OnlineFrame = V110_OnMatrix_38400;
+ v->OfflineFrame = V110_OffMatrix_38400;
+ break;
+ case V110_19200:
+ v->OnlineFrame = V110_OnMatrix_19200;
+ v->OfflineFrame = V110_OffMatrix_19200;
+ break;
+ default:
+ v->OnlineFrame = V110_OnMatrix_9600;
+ v->OfflineFrame = V110_OffMatrix_9600;
+ break;
}
v->framelen = v->nbytes * 10;
v->SyncInit = 5;
@@ -132,7 +132,7 @@ isdn_v110_open(unsigned char key, int hdrlen, int maxsize)
/* isdn_v110_close frees private V.110 data structures */
void
-isdn_v110_close(isdn_v110_stream * v)
+isdn_v110_close(isdn_v110_stream *v)
{
if (v == NULL)
return;
@@ -144,11 +144,11 @@ isdn_v110_close(isdn_v110_stream * v)
}
-/*
- * ValidHeaderBytes return the number of valid bytes in v->decodebuf
+/*
+ * ValidHeaderBytes return the number of valid bytes in v->decodebuf
*/
static int
-ValidHeaderBytes(isdn_v110_stream * v)
+ValidHeaderBytes(isdn_v110_stream *v)
{
int i;
for (i = 0; (i < v->decodelen) && (i < v->nbytes); i++)
@@ -157,11 +157,11 @@ ValidHeaderBytes(isdn_v110_stream * v)
return i;
}
-/*
- * SyncHeader moves the decodebuf ptr to the next valid header
+/*
+ * SyncHeader moves the decodebuf ptr to the next valid header
*/
static void
-SyncHeader(isdn_v110_stream * v)
+SyncHeader(isdn_v110_stream *v)
{
unsigned char *rbuf = v->decodebuf;
int len = v->decodelen;
@@ -185,9 +185,9 @@ SyncHeader(isdn_v110_stream * v)
only complete matices must be given.
From these, netto data is extracted and returned in buf. The return-value
is the bytecount of the decoded data.
- */
+*/
static int
-DecodeMatrix(isdn_v110_stream * v, unsigned char *m, int len, unsigned char *buf)
+DecodeMatrix(isdn_v110_stream *v, unsigned char *m, int len, unsigned char *buf)
{
int line = 0;
int buflen = 0;
@@ -203,7 +203,7 @@ DecodeMatrix(isdn_v110_stream * v, unsigned char *m, int len, unsigned char *buf
printk(KERN_DEBUG "isdn_v110: DecodeMatrix, V110 Bad Header\n");
/* returning now is not the right thing, though :-( */
#endif
- }
+ }
line++; /* next line of matrix */
continue;
} else if ((line % 10) == 5) { /* in line 5 there's only e-bits ! */
@@ -217,7 +217,7 @@ DecodeMatrix(isdn_v110_stream * v, unsigned char *m, int len, unsigned char *buf
continue;
} else if (!introducer) { /* every byte starts with 10 (stopbit, startbit) */
introducer = (m[line] & mbit) ? 0 : 1; /* current bit of the matrix */
- next_byte:
+ next_byte:
if (mbit > 2) { /* was it the last bit in this line ? */
mbit >>= 1; /* no -> take next */
continue;
@@ -246,13 +246,13 @@ DecodeMatrix(isdn_v110_stream * v, unsigned char *m, int len, unsigned char *buf
return buflen; /* return number of bytes in the output buffer */
}
-/*
- * DecodeStream receives V.110 coded data from the input stream. It recovers the
+/*
+ * DecodeStream receives V.110 coded data from the input stream. It recovers the
* original frames.
* The input stream doesn't need to be framed
*/
struct sk_buff *
-isdn_v110_decode(isdn_v110_stream * v, struct sk_buff *skb)
+isdn_v110_decode(isdn_v110_stream *v, struct sk_buff *skb)
{
int i;
int j;
@@ -283,7 +283,7 @@ isdn_v110_decode(isdn_v110_stream * v, struct sk_buff *skb)
/* copy new data to decode-buffer */
memcpy(&(v->decodebuf[v->decodelen]), rbuf, len);
v->decodelen += len;
- ReSync:
+ReSync:
if (v->decodelen < v->nbytes) { /* got a new header ? */
dev_kfree_skb(skb);
return NULL; /* no, try later */
@@ -320,7 +320,7 @@ isdn_v110_decode(isdn_v110_stream * v, struct sk_buff *skb)
/* EncodeMatrix takes input data in buf, len is the bytecount.
Data is encoded into v110 frames in m. Return value is the number of
matrix-lines generated.
- */
+*/
static int
EncodeMatrix(unsigned char *buf, int len, unsigned char *m, int mlen)
{
@@ -333,14 +333,14 @@ EncodeMatrix(unsigned char *buf, int len, unsigned char *m, int mlen)
while ((i < len) && (line < mlen)) { /* while we still have input data */
switch (line % 10) { /* in which line of the matrix are we? */
- case 0:
- m[line++] = 0x00; /* line 0 is always 0 */
- mbit = 128; /* go on with the 7th bit */
- break;
- case 5:
- m[line++] = 0xbf; /* line 5 is always 10111111 */
- mbit = 128; /* go on with the 7th bit */
- break;
+ case 0:
+ m[line++] = 0x00; /* line 0 is always 0 */
+ mbit = 128; /* go on with the 7th bit */
+ break;
+ case 5:
+ m[line++] = 0xbf; /* line 5 is always 10111111 */
+ mbit = 128; /* go on with the 7th bit */
+ break;
}
if (line >= mlen) {
printk(KERN_WARNING "isdn_v110 (EncodeMatrix): buffer full!\n");
@@ -348,16 +348,16 @@ EncodeMatrix(unsigned char *buf, int len, unsigned char *m, int mlen)
}
next_bit:
switch (mbit) { /* leftmost or rightmost bit ? */
- case 1:
- line++; /* rightmost -> go to next line */
- if (line >= mlen) {
- printk(KERN_WARNING "isdn_v110 (EncodeMatrix): buffer full!\n");
- return line;
- }
- case 128:
- m[line] = 128; /* leftmost -> set byte to 1000000 */
- mbit = 64; /* current bit in the matrix line */
- continue;
+ case 1:
+ line++; /* rightmost -> go to next line */
+ if (line >= mlen) {
+ printk(KERN_WARNING "isdn_v110 (EncodeMatrix): buffer full!\n");
+ return line;
+ }
+ case 128:
+ m[line] = 128; /* leftmost -> set byte to 1000000 */
+ mbit = 64; /* current bit in the matrix line */
+ continue;
}
if (introducer) { /* set 110 sequence ? */
introducer--; /* set on digit less */
@@ -384,24 +384,24 @@ EncodeMatrix(unsigned char *buf, int len, unsigned char *m, int mlen)
/* if necessary, generate remaining lines of the matrix... */
if ((line) && ((line + 10) < mlen))
switch (++line % 10) {
- case 1:
- m[line++] = 0xfe;
- case 2:
- m[line++] = 0xfe;
- case 3:
- m[line++] = 0xfe;
- case 4:
- m[line++] = 0xfe;
- case 5:
- m[line++] = 0xbf;
- case 6:
- m[line++] = 0xfe;
- case 7:
- m[line++] = 0xfe;
- case 8:
- m[line++] = 0xfe;
- case 9:
- m[line++] = 0xfe;
+ case 1:
+ m[line++] = 0xfe;
+ case 2:
+ m[line++] = 0xfe;
+ case 3:
+ m[line++] = 0xfe;
+ case 4:
+ m[line++] = 0xfe;
+ case 5:
+ m[line++] = 0xbf;
+ case 6:
+ m[line++] = 0xfe;
+ case 7:
+ m[line++] = 0xfe;
+ case 8:
+ m[line++] = 0xfe;
+ case 9:
+ m[line++] = 0xfe;
}
return line; /* that's how many lines we have */
}
@@ -447,7 +447,7 @@ isdn_v110_idle(isdn_v110_stream *v)
}
struct sk_buff *
-isdn_v110_encode(isdn_v110_stream * v, struct sk_buff *skb)
+isdn_v110_encode(isdn_v110_stream *v, struct sk_buff *skb)
{
int i;
int j;
@@ -524,93 +524,93 @@ isdn_v110_stat_callback(int idx, isdn_ctrl *c)
if (idx < 0)
return 0;
switch (c->command) {
- case ISDN_STAT_BSENT:
- /* Keep the send-queue of the driver filled
- * with frames:
- * If number of outstanding frames < 3,
- * send down an Idle-Frame (or an Sync-Frame, if
- * v->SyncInit != 0).
- */
- if (!(v = dev->v110[idx]))
- return 0;
- atomic_inc(&dev->v110use[idx]);
- for (i=0; i * v->framelen < c->parm.length; i++) {
- if (v->skbidle > 0) {
- v->skbidle--;
- ret = 1;
+ case ISDN_STAT_BSENT:
+ /* Keep the send-queue of the driver filled
+ * with frames:
+ * If number of outstanding frames < 3,
+ * send down an Idle-Frame (or an Sync-Frame, if
+ * v->SyncInit != 0).
+ */
+ if (!(v = dev->v110[idx]))
+ return 0;
+ atomic_inc(&dev->v110use[idx]);
+ for (i = 0; i * v->framelen < c->parm.length; i++) {
+ if (v->skbidle > 0) {
+ v->skbidle--;
+ ret = 1;
+ } else {
+ if (v->skbuser > 0)
+ v->skbuser--;
+ ret = 0;
+ }
+ }
+ for (i = v->skbuser + v->skbidle; i < 2; i++) {
+ struct sk_buff *skb;
+ if (v->SyncInit > 0)
+ skb = isdn_v110_sync(v);
+ else
+ skb = isdn_v110_idle(v);
+ if (skb) {
+ if (dev->drv[c->driver]->interface->writebuf_skb(c->driver, c->arg, 1, skb) <= 0) {
+ dev_kfree_skb(skb);
+ break;
} else {
- if (v->skbuser > 0)
- v->skbuser--;
- ret = 0;
+ if (v->SyncInit)
+ v->SyncInit--;
+ v->skbidle++;
}
+ } else
+ break;
+ }
+ atomic_dec(&dev->v110use[idx]);
+ return ret;
+ case ISDN_STAT_DHUP:
+ case ISDN_STAT_BHUP:
+ while (1) {
+ atomic_inc(&dev->v110use[idx]);
+ if (atomic_dec_and_test(&dev->v110use[idx])) {
+ isdn_v110_close(dev->v110[idx]);
+ dev->v110[idx] = NULL;
+ break;
+ }
+ mdelay(1);
+ }
+ break;
+ case ISDN_STAT_BCONN:
+ if (dev->v110emu[idx] && (dev->v110[idx] == NULL)) {
+ int hdrlen = dev->drv[c->driver]->interface->hl_hdrlen;
+ int maxsize = dev->drv[c->driver]->interface->maxbufsize;
+ atomic_inc(&dev->v110use[idx]);
+ switch (dev->v110emu[idx]) {
+ case ISDN_PROTO_L2_V11096:
+ dev->v110[idx] = isdn_v110_open(V110_9600, hdrlen, maxsize);
+ break;
+ case ISDN_PROTO_L2_V11019:
+ dev->v110[idx] = isdn_v110_open(V110_19200, hdrlen, maxsize);
+ break;
+ case ISDN_PROTO_L2_V11038:
+ dev->v110[idx] = isdn_v110_open(V110_38400, hdrlen, maxsize);
+ break;
+ default:;
}
- for (i = v->skbuser + v->skbidle; i < 2; i++) {
- struct sk_buff *skb;
- if (v->SyncInit > 0)
- skb = isdn_v110_sync(v);
- else
- skb = isdn_v110_idle(v);
- if (skb) {
+ if ((v = dev->v110[idx])) {
+ while (v->SyncInit) {
+ struct sk_buff *skb = isdn_v110_sync(v);
if (dev->drv[c->driver]->interface->writebuf_skb(c->driver, c->arg, 1, skb) <= 0) {
dev_kfree_skb(skb);
+ /* Unable to send, try later */
break;
- } else {
- if (v->SyncInit)
- v->SyncInit--;
- v->skbidle++;
}
- } else
- break;
- }
- atomic_dec(&dev->v110use[idx]);
- return ret;
- case ISDN_STAT_DHUP:
- case ISDN_STAT_BHUP:
- while (1) {
- atomic_inc(&dev->v110use[idx]);
- if (atomic_dec_and_test(&dev->v110use[idx])) {
- isdn_v110_close(dev->v110[idx]);
- dev->v110[idx] = NULL;
- break;
+ v->SyncInit--;
+ v->skbidle++;
}
- mdelay(1);
- }
- break;
- case ISDN_STAT_BCONN:
- if (dev->v110emu[idx] && (dev->v110[idx] == NULL)) {
- int hdrlen = dev->drv[c->driver]->interface->hl_hdrlen;
- int maxsize = dev->drv[c->driver]->interface->maxbufsize;
- atomic_inc(&dev->v110use[idx]);
- switch (dev->v110emu[idx]) {
- case ISDN_PROTO_L2_V11096:
- dev->v110[idx] = isdn_v110_open(V110_9600, hdrlen, maxsize);
- break;
- case ISDN_PROTO_L2_V11019:
- dev->v110[idx] = isdn_v110_open(V110_19200, hdrlen, maxsize);
- break;
- case ISDN_PROTO_L2_V11038:
- dev->v110[idx] = isdn_v110_open(V110_38400, hdrlen, maxsize);
- break;
- default:;
- }
- if ((v = dev->v110[idx])) {
- while (v->SyncInit) {
- struct sk_buff *skb = isdn_v110_sync(v);
- if (dev->drv[c->driver]->interface->writebuf_skb(c->driver, c->arg, 1, skb) <= 0) {
- dev_kfree_skb(skb);
- /* Unable to send, try later */
- break;
- }
- v->SyncInit--;
- v->skbidle++;
- }
- } else
- printk(KERN_WARNING "isdn_v110: Couldn't open stream for chan %d\n", idx);
- atomic_dec(&dev->v110use[idx]);
- }
- break;
- default:
- return 0;
+ } else
+ printk(KERN_WARNING "isdn_v110: Couldn't open stream for chan %d\n", idx);
+ atomic_dec(&dev->v110use[idx]);
+ }
+ break;
+ default:
+ return 0;
}
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.