q3k/linux
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
linux/drivers/isdn/hisax/netjet.c
Jesper Juhl 3c7208f253 [PATCH] kfree cleanup: drivers/isdn 
This is the drivers/isdn/ part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in drivers/isdn/.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:54:02 -08:00

982 lines
26 KiB
C
Raw Blame History

/* $Id: netjet.c,v 1.29.2.4 2004/02/11 13:21:34 keil Exp $
*
* low level stuff for Traverse Technologie NETJet ISDN cards
*
* Author Karsten Keil
* Copyright by Karsten Keil <keil@isdn4linux.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* Thanks to Traverse Technologies Australia for documents and information
*
* 16-Apr-2002 - led code added - Guy Ellis (guy@traverse.com.au)
*
*/
#include <linux/init.h>
#include "hisax.h"
#include "isac.h"
#include "hscx.h"
#include "isdnl1.h"
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/ppp_defs.h>
#include <asm/io.h>
#include "netjet.h"
/* Interface functions */
u_char
NETjet_ReadIC(struct IsdnCardState *cs, u_char offset)
{
u_char ret;
cs->hw.njet.auxd &= 0xfc;
cs->hw.njet.auxd |= (offset>>4) & 3;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
ret = bytein(cs->hw.njet.isac + ((offset & 0xf)<<2));
return(ret);
}
void
NETjet_WriteIC(struct IsdnCardState *cs, u_char offset, u_char value)
{
cs->hw.njet.auxd &= 0xfc;
cs->hw.njet.auxd |= (offset>>4) & 3;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
byteout(cs->hw.njet.isac + ((offset & 0xf)<<2), value);
}
void
NETjet_ReadICfifo(struct IsdnCardState *cs, u_char *data, int size)
{
cs->hw.njet.auxd &= 0xfc;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
insb(cs->hw.njet.isac, data, size);
}
void
NETjet_WriteICfifo(struct IsdnCardState *cs, u_char *data, int size)
{
cs->hw.njet.auxd &= 0xfc;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
outsb(cs->hw.njet.isac, data, size);
}
static void fill_mem(struct BCState *bcs, u_int *pos, u_int cnt, int chan, u_char fill)
{
u_int mask=0x000000ff, val = 0, *p=pos;
u_int i;
val |= fill;
if (chan) {
val <<= 8;
mask <<= 8;
}
mask ^= 0xffffffff;
for (i=0; i<cnt; i++) {
*p &= mask;
*p++ |= val;
if (p > bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send;
}
}
static void
mode_tiger(struct BCState *bcs, int mode, int bc)
{
struct IsdnCardState *cs = bcs->cs;
u_char led;
if (cs->debug & L1_DEB_HSCX)
debugl1(cs, "Tiger mode %d bchan %d/%d",
mode, bc, bcs->channel);
bcs->mode = mode;
bcs->channel = bc;
switch (mode) {
case (L1_MODE_NULL):
fill_mem(bcs, bcs->hw.tiger.send,
NETJET_DMA_TXSIZE, bc, 0xff);
if (cs->debug & L1_DEB_HSCX)
debugl1(cs, "Tiger stat rec %d/%d send %d",
bcs->hw.tiger.r_tot, bcs->hw.tiger.r_err,
bcs->hw.tiger.s_tot);
if ((cs->bcs[0].mode == L1_MODE_NULL) &&
(cs->bcs[1].mode == L1_MODE_NULL)) {
cs->hw.njet.dmactrl = 0;
byteout(cs->hw.njet.base + NETJET_DMACTRL,
cs->hw.njet.dmactrl);
byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
}
if (cs->typ == ISDN_CTYPE_NETJET_S)
{
// led off
led = bc & 0x01;
led = 0x01 << (6 + led); // convert to mask
led = ~led;
cs->hw.njet.auxd &= led;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
}
break;
case (L1_MODE_TRANS):
break;
case (L1_MODE_HDLC_56K):
case (L1_MODE_HDLC):
fill_mem(bcs, bcs->hw.tiger.send,
NETJET_DMA_TXSIZE, bc, 0xff);
bcs->hw.tiger.r_state = HDLC_ZERO_SEARCH;
bcs->hw.tiger.r_tot = 0;
bcs->hw.tiger.r_bitcnt = 0;
bcs->hw.tiger.r_one = 0;
bcs->hw.tiger.r_err = 0;
bcs->hw.tiger.s_tot = 0;
if (! cs->hw.njet.dmactrl) {
fill_mem(bcs, bcs->hw.tiger.send,
NETJET_DMA_TXSIZE, !bc, 0xff);
cs->hw.njet.dmactrl = 1;
byteout(cs->hw.njet.base + NETJET_DMACTRL,
cs->hw.njet.dmactrl);
byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0x0f);
/* was 0x3f now 0x0f for TJ300 and TJ320 GE 13/07/00 */
}
bcs->hw.tiger.sendp = bcs->hw.tiger.send;
bcs->hw.tiger.free = NETJET_DMA_TXSIZE;
test_and_set_bit(BC_FLG_EMPTY, &bcs->Flag);
if (cs->typ == ISDN_CTYPE_NETJET_S)
{
// led on
led = bc & 0x01;
led = 0x01 << (6 + led); // convert to mask
cs->hw.njet.auxd |= led;
byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
}
break;
}
if (cs->debug & L1_DEB_HSCX)
debugl1(cs, "tiger: set %x %x %x %x/%x pulse=%d",
bytein(cs->hw.njet.base + NETJET_DMACTRL),
bytein(cs->hw.njet.base + NETJET_IRQMASK0),
bytein(cs->hw.njet.base + NETJET_IRQSTAT0),
inl(cs->hw.njet.base + NETJET_DMA_READ_ADR),
inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR),
bytein(cs->hw.njet.base + NETJET_PULSE_CNT));
}
static void printframe(struct IsdnCardState *cs, u_char *buf, int count, char *s) {
char tmp[128];
char *t = tmp;
int i=count,j;
u_char *p = buf;
t += sprintf(t, "tiger %s(%4d)", s, count);
while (i>0) {
if (i>16)
j=16;
else
j=i;
QuickHex(t, p, j);
debugl1(cs, tmp);
p += j;
i -= j;
t = tmp;
t += sprintf(t, "tiger %s ", s);
}
}
// macro for 64k
#define MAKE_RAW_BYTE for (j=0; j<8; j++) { \
bitcnt++;\
s_val >>= 1;\
if (val & 1) {\
s_one++;\
s_val |= 0x80;\
} else {\
s_one = 0;\
s_val &= 0x7f;\
}\
if (bitcnt==8) {\
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;\
bitcnt = 0;\
}\
if (s_one == 5) {\
s_val >>= 1;\
s_val &= 0x7f;\
bitcnt++;\
s_one = 0;\
}\
if (bitcnt==8) {\
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;\
bitcnt = 0;\
}\
val >>= 1;\
}
static int make_raw_data(struct BCState *bcs) {
// this make_raw is for 64k
register u_int i,s_cnt=0;
register u_char j;
register u_char val;
register u_char s_one = 0;
register u_char s_val = 0;
register u_char bitcnt = 0;
u_int fcs;
if (!bcs->tx_skb) {
debugl1(bcs->cs, "tiger make_raw: NULL skb");
return(1);
}
bcs->hw.tiger.sendbuf[s_cnt++] = HDLC_FLAG_VALUE;
fcs = PPP_INITFCS;
for (i=0; i<bcs->tx_skb->len; i++) {
val = bcs->tx_skb->data[i];
fcs = PPP_FCS (fcs, val);
MAKE_RAW_BYTE;
}
fcs ^= 0xffff;
val = fcs & 0xff;
MAKE_RAW_BYTE;
val = (fcs>>8) & 0xff;
MAKE_RAW_BYTE;
val = HDLC_FLAG_VALUE;
for (j=0; j<8; j++) {
bitcnt++;
s_val >>= 1;
if (val & 1)
s_val |= 0x80;
else
s_val &= 0x7f;
if (bitcnt==8) {
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;
bitcnt = 0;
}
val >>= 1;
}
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger make_raw: in %ld out %d.%d",
bcs->tx_skb->len, s_cnt, bitcnt);
if (bitcnt) {
while (8>bitcnt++) {
s_val >>= 1;
s_val |= 0x80;
}
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;
bcs->hw.tiger.sendbuf[s_cnt++] = 0xff; // NJ<->NJ thoughput bug fix
}
bcs->hw.tiger.sendcnt = s_cnt;
bcs->tx_cnt -= bcs->tx_skb->len;
bcs->hw.tiger.sp = bcs->hw.tiger.sendbuf;
return(0);
}
// macro for 56k
#define MAKE_RAW_BYTE_56K for (j=0; j<8; j++) { \
bitcnt++;\
s_val >>= 1;\
if (val & 1) {\
s_one++;\
s_val |= 0x80;\
} else {\
s_one = 0;\
s_val &= 0x7f;\
}\
if (bitcnt==7) {\
s_val >>= 1;\
s_val |= 0x80;\
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;\
bitcnt = 0;\
}\
if (s_one == 5) {\
s_val >>= 1;\
s_val &= 0x7f;\
bitcnt++;\
s_one = 0;\
}\
if (bitcnt==7) {\
s_val >>= 1;\
s_val |= 0x80;\
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;\
bitcnt = 0;\
}\
val >>= 1;\
}
static int make_raw_data_56k(struct BCState *bcs) {
// this make_raw is for 56k
register u_int i,s_cnt=0;
register u_char j;
register u_char val;
register u_char s_one = 0;
register u_char s_val = 0;
register u_char bitcnt = 0;
u_int fcs;
if (!bcs->tx_skb) {
debugl1(bcs->cs, "tiger make_raw_56k: NULL skb");
return(1);
}
val = HDLC_FLAG_VALUE;
for (j=0; j<8; j++) {
bitcnt++;
s_val >>= 1;
if (val & 1)
s_val |= 0x80;
else
s_val &= 0x7f;
if (bitcnt==7) {
s_val >>= 1;
s_val |= 0x80;
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;
bitcnt = 0;
}
val >>= 1;
};
fcs = PPP_INITFCS;
for (i=0; i<bcs->tx_skb->len; i++) {
val = bcs->tx_skb->data[i];
fcs = PPP_FCS (fcs, val);
MAKE_RAW_BYTE_56K;
}
fcs ^= 0xffff;
val = fcs & 0xff;
MAKE_RAW_BYTE_56K;
val = (fcs>>8) & 0xff;
MAKE_RAW_BYTE_56K;
val = HDLC_FLAG_VALUE;
for (j=0; j<8; j++) {
bitcnt++;
s_val >>= 1;
if (val & 1)
s_val |= 0x80;
else
s_val &= 0x7f;
if (bitcnt==7) {
s_val >>= 1;
s_val |= 0x80;
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;
bitcnt = 0;
}
val >>= 1;
}
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger make_raw_56k: in %ld out %d.%d",
bcs->tx_skb->len, s_cnt, bitcnt);
if (bitcnt) {
while (8>bitcnt++) {
s_val >>= 1;
s_val |= 0x80;
}
bcs->hw.tiger.sendbuf[s_cnt++] = s_val;
bcs->hw.tiger.sendbuf[s_cnt++] = 0xff; // NJ<->NJ thoughput bug fix
}
bcs->hw.tiger.sendcnt = s_cnt;
bcs->tx_cnt -= bcs->tx_skb->len;
bcs->hw.tiger.sp = bcs->hw.tiger.sendbuf;
return(0);
}
static void got_frame(struct BCState *bcs, int count) {
struct sk_buff *skb;
if (!(skb = dev_alloc_skb(count)))
printk(KERN_WARNING "TIGER: receive out of memory\n");
else {
memcpy(skb_put(skb, count), bcs->hw.tiger.rcvbuf, count);
skb_queue_tail(&bcs->rqueue, skb);
}
test_and_set_bit(B_RCVBUFREADY, &bcs->event);
schedule_work(&bcs->tqueue);
if (bcs->cs->debug & L1_DEB_RECEIVE_FRAME)
printframe(bcs->cs, bcs->hw.tiger.rcvbuf, count, "rec");
}
static void read_raw(struct BCState *bcs, u_int *buf, int cnt){
int i;
register u_char j;
register u_char val;
u_int *pend = bcs->hw.tiger.rec +NETJET_DMA_RXSIZE -1;
register u_char state = bcs->hw.tiger.r_state;
register u_char r_one = bcs->hw.tiger.r_one;
register u_char r_val = bcs->hw.tiger.r_val;
register u_int bitcnt = bcs->hw.tiger.r_bitcnt;
u_int *p = buf;
int bits;
u_char mask;
if (bcs->mode == L1_MODE_HDLC) { // it's 64k
mask = 0xff;
bits = 8;
}
else { // it's 56K
mask = 0x7f;
bits = 7;
};
for (i=0;i<cnt;i++) {
val = bcs->channel ? ((*p>>8) & 0xff) : (*p & 0xff);
p++;
if (p > pend)
p = bcs->hw.tiger.rec;
if ((val & mask) == mask) {
state = HDLC_ZERO_SEARCH;
bcs->hw.tiger.r_tot++;
bitcnt = 0;
r_one = 0;
continue;
}
for (j=0;j<bits;j++) {
if (state == HDLC_ZERO_SEARCH) {
if (val & 1) {
r_one++;
} else {
r_one=0;
state= HDLC_FLAG_SEARCH;
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger read_raw: zBit(%d,%d,%d) %x",
bcs->hw.tiger.r_tot,i,j,val);
}
} else if (state == HDLC_FLAG_SEARCH) {
if (val & 1) {
r_one++;
if (r_one>6) {
state=HDLC_ZERO_SEARCH;
}
} else {
if (r_one==6) {
bitcnt=0;
r_val=0;
state=HDLC_FLAG_FOUND;
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger read_raw: flag(%d,%d,%d) %x",
bcs->hw.tiger.r_tot,i,j,val);
}
r_one=0;
}
} else if (state == HDLC_FLAG_FOUND) {
if (val & 1) {
r_one++;
if (r_one>6) {
state=HDLC_ZERO_SEARCH;
} else {
r_val >>= 1;
r_val |= 0x80;
bitcnt++;
}
} else {
if (r_one==6) {
bitcnt=0;
r_val=0;
r_one=0;
val >>= 1;
continue;
} else if (r_one!=5) {
r_val >>= 1;
r_val &= 0x7f;
bitcnt++;
}
r_one=0;
}
if ((state != HDLC_ZERO_SEARCH) &&
!(bitcnt & 7)) {
state=HDLC_FRAME_FOUND;
bcs->hw.tiger.r_fcs = PPP_INITFCS;
bcs->hw.tiger.rcvbuf[0] = r_val;
bcs->hw.tiger.r_fcs = PPP_FCS (bcs->hw.tiger.r_fcs, r_val);
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger read_raw: byte1(%d,%d,%d) rval %x val %x i %x",
bcs->hw.tiger.r_tot,i,j,r_val,val,
bcs->cs->hw.njet.irqstat0);
}
} else if (state == HDLC_FRAME_FOUND) {
if (val & 1) {
r_one++;
if (r_one>6) {
state=HDLC_ZERO_SEARCH;
bitcnt=0;
} else {
r_val >>= 1;
r_val |= 0x80;
bitcnt++;
}
} else {
if (r_one==6) {
r_val=0;
r_one=0;
bitcnt++;
if (bitcnt & 7) {
debugl1(bcs->cs, "tiger: frame not byte aligned");
state=HDLC_FLAG_SEARCH;
bcs->hw.tiger.r_err++;
#ifdef ERROR_STATISTIC
bcs->err_inv++;
#endif
} else {
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger frame end(%d,%d): fcs(%x) i %x",
i,j,bcs->hw.tiger.r_fcs, bcs->cs->hw.njet.irqstat0);
if (bcs->hw.tiger.r_fcs == PPP_GOODFCS) {
got_frame(bcs, (bitcnt>>3)-3);
} else {
if (bcs->cs->debug) {
debugl1(bcs->cs, "tiger FCS error");
printframe(bcs->cs, bcs->hw.tiger.rcvbuf,
(bitcnt>>3)-1, "rec");
bcs->hw.tiger.r_err++;
}
#ifdef ERROR_STATISTIC
bcs->err_crc++;
#endif
}
state=HDLC_FLAG_FOUND;
}
bitcnt=0;
} else if (r_one==5) {
val >>= 1;
r_one=0;
continue;
} else {
r_val >>= 1;
r_val &= 0x7f;
bitcnt++;
}
r_one=0;
}
if ((state == HDLC_FRAME_FOUND) &&
!(bitcnt & 7)) {
if ((bitcnt>>3)>=HSCX_BUFMAX) {
debugl1(bcs->cs, "tiger: frame too big");
r_val=0;
state=HDLC_FLAG_SEARCH;
bcs->hw.tiger.r_err++;
#ifdef ERROR_STATISTIC
bcs->err_inv++;
#endif
} else {
bcs->hw.tiger.rcvbuf[(bitcnt>>3)-1] = r_val;
bcs->hw.tiger.r_fcs =
PPP_FCS (bcs->hw.tiger.r_fcs, r_val);
}
}
}
val >>= 1;
}
bcs->hw.tiger.r_tot++;
}
bcs->hw.tiger.r_state = state;
bcs->hw.tiger.r_one = r_one;
bcs->hw.tiger.r_val = r_val;
bcs->hw.tiger.r_bitcnt = bitcnt;
}
void read_tiger(struct IsdnCardState *cs) {
u_int *p;
int cnt = NETJET_DMA_RXSIZE/2;
if ((cs->hw.njet.irqstat0 & cs->hw.njet.last_is0) & NETJET_IRQM0_READ) {
debugl1(cs,"tiger warn read double dma %x/%x",
cs->hw.njet.irqstat0, cs->hw.njet.last_is0);
#ifdef ERROR_STATISTIC
if (cs->bcs[0].mode)
cs->bcs[0].err_rdo++;
if (cs->bcs[1].mode)
cs->bcs[1].err_rdo++;
#endif
return;
} else {
cs->hw.njet.last_is0 &= ~NETJET_IRQM0_READ;
cs->hw.njet.last_is0 |= (cs->hw.njet.irqstat0 & NETJET_IRQM0_READ);
}
if (cs->hw.njet.irqstat0 & NETJET_IRQM0_READ_1)
p = cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1;
else
p = cs->bcs[0].hw.tiger.rec + cnt - 1;
if ((cs->bcs[0].mode == L1_MODE_HDLC) || (cs->bcs[0].mode == L1_MODE_HDLC_56K))
read_raw(cs->bcs, p, cnt);
if ((cs->bcs[1].mode == L1_MODE_HDLC) || (cs->bcs[1].mode == L1_MODE_HDLC_56K))
read_raw(cs->bcs + 1, p, cnt);
cs->hw.njet.irqstat0 &= ~NETJET_IRQM0_READ;
}
static void write_raw(struct BCState *bcs, u_int *buf, int cnt);
void netjet_fill_dma(struct BCState *bcs)
{
register u_int *p, *sp;
register int cnt;
if (!bcs->tx_skb)
return;
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger fill_dma1: c%d %4x", bcs->channel,
bcs->Flag);
if (test_and_set_bit(BC_FLG_BUSY, &bcs->Flag))
return;
if (bcs->mode == L1_MODE_HDLC) { // it's 64k
if (make_raw_data(bcs))
return;
}
else { // it's 56k
if (make_raw_data_56k(bcs))
return;
};
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger fill_dma2: c%d %4x", bcs->channel,
bcs->Flag);
if (test_and_clear_bit(BC_FLG_NOFRAME, &bcs->Flag)) {
write_raw(bcs, bcs->hw.tiger.sendp, bcs->hw.tiger.free);
} else if (test_and_clear_bit(BC_FLG_HALF, &bcs->Flag)) {
p = bus_to_virt(inl(bcs->cs->hw.njet.base + NETJET_DMA_READ_ADR));
sp = bcs->hw.tiger.sendp;
if (p == bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send -1;
if (sp == bcs->hw.tiger.s_end)
sp = bcs->hw.tiger.send -1;
cnt = p - sp;
if (cnt <0) {
write_raw(bcs, bcs->hw.tiger.sendp, bcs->hw.tiger.free);
} else {
p++;
cnt++;
if (p > bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send;
p++;
cnt++;
if (p > bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send;
write_raw(bcs, p, bcs->hw.tiger.free - cnt);
}
} else if (test_and_clear_bit(BC_FLG_EMPTY, &bcs->Flag)) {
p = bus_to_virt(inl(bcs->cs->hw.njet.base + NETJET_DMA_READ_ADR));
cnt = bcs->hw.tiger.s_end - p;
if (cnt < 2) {
p = bcs->hw.tiger.send + 1;
cnt = NETJET_DMA_TXSIZE/2 - 2;
} else {
p++;
p++;
if (cnt <= (NETJET_DMA_TXSIZE/2))
cnt += NETJET_DMA_TXSIZE/2;
cnt--;
cnt--;
}
write_raw(bcs, p, cnt);
}
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger fill_dma3: c%d %4x", bcs->channel,
bcs->Flag);
}
static void write_raw(struct BCState *bcs, u_int *buf, int cnt) {
u_int mask, val, *p=buf;
u_int i, s_cnt;
if (cnt <= 0)
return;
if (test_bit(BC_FLG_BUSY, &bcs->Flag)) {
if (bcs->hw.tiger.sendcnt> cnt) {
s_cnt = cnt;
bcs->hw.tiger.sendcnt -= cnt;
} else {
s_cnt = bcs->hw.tiger.sendcnt;
bcs->hw.tiger.sendcnt = 0;
}
if (bcs->channel)
mask = 0xffff00ff;
else
mask = 0xffffff00;
for (i=0; i<s_cnt; i++) {
val = bcs->channel ? ((bcs->hw.tiger.sp[i] <<8) & 0xff00) :
(bcs->hw.tiger.sp[i]);
*p &= mask;
*p++ |= val;
if (p>bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send;
}
bcs->hw.tiger.s_tot += s_cnt;
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger write_raw: c%d %p-%p %d/%d %d %x", bcs->channel,
buf, p, s_cnt, cnt,
bcs->hw.tiger.sendcnt, bcs->cs->hw.njet.irqstat0);
if (bcs->cs->debug & L1_DEB_HSCX_FIFO)
printframe(bcs->cs, bcs->hw.tiger.sp, s_cnt, "snd");
bcs->hw.tiger.sp += s_cnt;
bcs->hw.tiger.sendp = p;
if (!bcs->hw.tiger.sendcnt) {
if (!bcs->tx_skb) {
debugl1(bcs->cs,"tiger write_raw: NULL skb s_cnt %d", s_cnt);
} else {
if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
u_long flags;
spin_lock_irqsave(&bcs->aclock, flags);
bcs->ackcnt += bcs->tx_skb->len;
spin_unlock_irqrestore(&bcs->aclock, flags);
schedule_event(bcs, B_ACKPENDING);
}
dev_kfree_skb_any(bcs->tx_skb);
bcs->tx_skb = NULL;
}
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
bcs->hw.tiger.free = cnt - s_cnt;
if (bcs->hw.tiger.free > (NETJET_DMA_TXSIZE/2))
test_and_set_bit(BC_FLG_HALF, &bcs->Flag);
else {
test_and_clear_bit(BC_FLG_HALF, &bcs->Flag);
test_and_set_bit(BC_FLG_NOFRAME, &bcs->Flag);
}
if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
netjet_fill_dma(bcs);
} else {
mask ^= 0xffffffff;
if (s_cnt < cnt) {
for (i=s_cnt; i<cnt;i++) {
*p++ |= mask;
if (p>bcs->hw.tiger.s_end)
p = bcs->hw.tiger.send;
}
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs, "tiger write_raw: fill rest %d",
cnt - s_cnt);
}
test_and_set_bit(B_XMTBUFREADY, &bcs->event);
schedule_work(&bcs->tqueue);
}
}
} else if (test_and_clear_bit(BC_FLG_NOFRAME, &bcs->Flag)) {
test_and_set_bit(BC_FLG_HALF, &bcs->Flag);
fill_mem(bcs, buf, cnt, bcs->channel, 0xff);
bcs->hw.tiger.free += cnt;
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger write_raw: fill half");
} else if (test_and_clear_bit(BC_FLG_HALF, &bcs->Flag)) {
test_and_set_bit(BC_FLG_EMPTY, &bcs->Flag);
fill_mem(bcs, buf, cnt, bcs->channel, 0xff);
if (bcs->cs->debug & L1_DEB_HSCX)
debugl1(bcs->cs,"tiger write_raw: fill full");
}
}
void write_tiger(struct IsdnCardState *cs) {
u_int *p, cnt = NETJET_DMA_TXSIZE/2;
if ((cs->hw.njet.irqstat0 & cs->hw.njet.last_is0) & NETJET_IRQM0_WRITE) {
debugl1(cs,"tiger warn write double dma %x/%x",
cs->hw.njet.irqstat0, cs->hw.njet.last_is0);
#ifdef ERROR_STATISTIC
if (cs->bcs[0].mode)
cs->bcs[0].err_tx++;
if (cs->bcs[1].mode)
cs->bcs[1].err_tx++;
#endif
return;
} else {
cs->hw.njet.last_is0 &= ~NETJET_IRQM0_WRITE;
cs->hw.njet.last_is0 |= (cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE);
}
if (cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE_1)
p = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1;
else
p = cs->bcs[0].hw.tiger.send + cnt - 1;
if ((cs->bcs[0].mode == L1_MODE_HDLC) || (cs->bcs[0].mode == L1_MODE_HDLC_56K))
write_raw(cs->bcs, p, cnt);
if ((cs->bcs[1].mode == L1_MODE_HDLC) || (cs->bcs[1].mode == L1_MODE_HDLC_56K))
write_raw(cs->bcs + 1, p, cnt);
cs->hw.njet.irqstat0 &= ~NETJET_IRQM0_WRITE;
}
static void
tiger_l2l1(struct PStack *st, int pr, void *arg)
{
struct BCState *bcs = st->l1.bcs;
struct sk_buff *skb = arg;
u_long flags;
switch (pr) {
case (PH_DATA | REQUEST):
spin_lock_irqsave(&bcs->cs->lock, flags);
if (bcs->tx_skb) {
skb_queue_tail(&bcs->squeue, skb);
} else {
bcs->tx_skb = skb;
bcs->cs->BC_Send_Data(bcs);
}
spin_unlock_irqrestore(&bcs->cs->lock, flags);
break;
case (PH_PULL | INDICATION):
spin_lock_irqsave(&bcs->cs->lock, flags);
if (bcs->tx_skb) {
printk(KERN_WARNING "tiger_l2l1: this shouldn't happen\n");
} else {
bcs->tx_skb = skb;
bcs->cs->BC_Send_Data(bcs);
}
spin_unlock_irqrestore(&bcs->cs->lock, flags);
break;
case (PH_PULL | REQUEST):
if (!bcs->tx_skb) {
test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
} else
test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
break;
case (PH_ACTIVATE | REQUEST):
spin_lock_irqsave(&bcs->cs->lock, flags);
test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
mode_tiger(bcs, st->l1.mode, st->l1.bc);
/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG */
spin_unlock_irqrestore(&bcs->cs->lock, flags);
bcs->cs->cardmsg(bcs->cs, MDL_BC_ASSIGN, (void *)(&st->l1.bc));
l1_msg_b(st, pr, arg);
break;
case (PH_DEACTIVATE | REQUEST):
/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG */
bcs->cs->cardmsg(bcs->cs, MDL_BC_RELEASE, (void *)(&st->l1.bc));
l1_msg_b(st, pr, arg);
break;
case (PH_DEACTIVATE | CONFIRM):
spin_lock_irqsave(&bcs->cs->lock, flags);
test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
mode_tiger(bcs, 0, st->l1.bc);
spin_unlock_irqrestore(&bcs->cs->lock, flags);
st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
break;
}
}
static void
close_tigerstate(struct BCState *bcs)
{
mode_tiger(bcs, 0, bcs->channel);
if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
kfree(bcs->hw.tiger.rcvbuf);
bcs->hw.tiger.rcvbuf = NULL;
kfree(bcs->hw.tiger.sendbuf);
bcs->hw.tiger.sendbuf = NULL;
skb_queue_purge(&bcs->rqueue);
skb_queue_purge(&bcs->squeue);
if (bcs->tx_skb) {
dev_kfree_skb_any(bcs->tx_skb);
bcs->tx_skb = NULL;
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
}
}
}
static int
open_tigerstate(struct IsdnCardState *cs, struct BCState *bcs)
{
if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
if (!(bcs->hw.tiger.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
printk(KERN_WARNING
"HiSax: No memory for tiger.rcvbuf\n");
return (1);
}
if (!(bcs->hw.tiger.sendbuf = kmalloc(RAW_BUFMAX, GFP_ATOMIC))) {
printk(KERN_WARNING
"HiSax: No memory for tiger.sendbuf\n");
return (1);
}
skb_queue_head_init(&bcs->rqueue);
skb_queue_head_init(&bcs->squeue);
}
bcs->tx_skb = NULL;
bcs->hw.tiger.sendcnt = 0;
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
bcs->event = 0;
bcs->tx_cnt = 0;
return (0);
}
static int
setstack_tiger(struct PStack *st, struct BCState *bcs)
{
bcs->channel = st->l1.bc;
if (open_tigerstate(st->l1.hardware, bcs))
return (-1);
st->l1.bcs = bcs;
st->l2.l2l1 = tiger_l2l1;
setstack_manager(st);
bcs->st = st;
setstack_l1_B(st);
return (0);
}
void __init
inittiger(struct IsdnCardState *cs)
{
if (!(cs->bcs[0].hw.tiger.send = kmalloc(NETJET_DMA_TXSIZE * sizeof(unsigned int),
GFP_KERNEL | GFP_DMA))) {
printk(KERN_WARNING
"HiSax: No memory for tiger.send\n");
return;
}
cs->bcs[0].hw.tiger.s_irq = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE/2 - 1;
cs->bcs[0].hw.tiger.s_end = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1;
cs->bcs[1].hw.tiger.send = cs->bcs[0].hw.tiger.send;
cs->bcs[1].hw.tiger.s_irq = cs->bcs[0].hw.tiger.s_irq;
cs->bcs[1].hw.tiger.s_end = cs->bcs[0].hw.tiger.s_end;
memset(cs->bcs[0].hw.tiger.send, 0xff, NETJET_DMA_TXSIZE * sizeof(unsigned int));
debugl1(cs, "tiger: send buf %p - %p", cs->bcs[0].hw.tiger.send,
cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1);
outl(virt_to_bus(cs->bcs[0].hw.tiger.send),
cs->hw.njet.base + NETJET_DMA_READ_START);
outl(virt_to_bus(cs->bcs[0].hw.tiger.s_irq),
cs->hw.njet.base + NETJET_DMA_READ_IRQ);
outl(virt_to_bus(cs->bcs[0].hw.tiger.s_end),
cs->hw.njet.base + NETJET_DMA_READ_END);
if (!(cs->bcs[0].hw.tiger.rec = kmalloc(NETJET_DMA_RXSIZE * sizeof(unsigned int),
GFP_KERNEL | GFP_DMA))) {
printk(KERN_WARNING
"HiSax: No memory for tiger.rec\n");
return;
}
debugl1(cs, "tiger: rec buf %p - %p", cs->bcs[0].hw.tiger.rec,
cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1);
cs->bcs[1].hw.tiger.rec = cs->bcs[0].hw.tiger.rec;
memset(cs->bcs[0].hw.tiger.rec, 0xff, NETJET_DMA_RXSIZE * sizeof(unsigned int));
outl(virt_to_bus(cs->bcs[0].hw.tiger.rec),
cs->hw.njet.base + NETJET_DMA_WRITE_START);
outl(virt_to_bus(cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE/2 - 1),
cs->hw.njet.base + NETJET_DMA_WRITE_IRQ);
outl(virt_to_bus(cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1),
cs->hw.njet.base + NETJET_DMA_WRITE_END);
debugl1(cs, "tiger: dmacfg %x/%x pulse=%d",
inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR),
inl(cs->hw.njet.base + NETJET_DMA_READ_ADR),
bytein(cs->hw.njet.base + NETJET_PULSE_CNT));
cs->hw.njet.last_is0 = 0;
cs->bcs[0].BC_SetStack = setstack_tiger;
cs->bcs[1].BC_SetStack = setstack_tiger;
cs->bcs[0].BC_Close = close_tigerstate;
cs->bcs[1].BC_Close = close_tigerstate;
}
static void
releasetiger(struct IsdnCardState *cs)
{
kfree(cs->bcs[0].hw.tiger.send);
cs->bcs[0].hw.tiger.send = NULL;
cs->bcs[1].hw.tiger.send = NULL;
kfree(cs->bcs[0].hw.tiger.rec);
cs->bcs[0].hw.tiger.rec = NULL;
cs->bcs[1].hw.tiger.rec = NULL;
}
void
release_io_netjet(struct IsdnCardState *cs)
{
byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
byteout(cs->hw.njet.base + NETJET_IRQMASK1, 0);
releasetiger(cs);
release_region(cs->hw.njet.base, 256);
}
Reference in a new issue View git blame Copy permalink