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kernel-fxtec-pro1x/drivers/isdn/hisax/jade.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

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/* $Id: jade.c,v 1.9.2.4 2004/01/14 16:04:48 keil Exp $
*
* JADE stuff (derived from original hscx.c)
*
* Author Roland Klabunde
* Copyright by Roland Klabunde <R.Klabunde@Berkom.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#include <linux/init.h>
#include "hisax.h"
#include "hscx.h"
#include "jade.h"
#include "isdnl1.h"
#include <linux/interrupt.h>
int __init
JadeVersion(struct IsdnCardState *cs, char *s)
{
int ver,i;
int to = 50;
cs->BC_Write_Reg(cs, -1, 0x50, 0x19);
i=0;
while (to) {
udelay(1);
ver = cs->BC_Read_Reg(cs, -1, 0x60);
to--;
if (ver)
break;
if (!to) {
printk(KERN_INFO "%s JADE version not obtainable\n", s);
return (0);
}
}
/* Wait for the JADE */
udelay(10);
/* Read version */
ver = cs->BC_Read_Reg(cs, -1, 0x60);
printk(KERN_INFO "%s JADE version: %d\n", s, ver);
return (1);
}
/* Write to indirect accessible jade register set */
static void
jade_write_indirect(struct IsdnCardState *cs, u_char reg, u_char value)
{
int to = 50;
u_char ret;
/* Write the data */
cs->BC_Write_Reg(cs, -1, COMM_JADE+1, value);
/* Say JADE we wanna write indirect reg 'reg' */
cs->BC_Write_Reg(cs, -1, COMM_JADE, reg);
to = 50;
/* Wait for RDY goes high */
while (to) {
udelay(1);
ret = cs->BC_Read_Reg(cs, -1, COMM_JADE);
to--;
if (ret & 1)
/* Got acknowledge */
break;
if (!to) {
printk(KERN_INFO "Can not see ready bit from JADE DSP (reg=0x%X, value=0x%X)\n", reg, value);
return;
}
}
}
static void
modejade(struct BCState *bcs, int mode, int bc)
{
struct IsdnCardState *cs = bcs->cs;
int jade = bcs->hw.hscx.hscx;
if (cs->debug & L1_DEB_HSCX) {
char tmp[40];
sprintf(tmp, "jade %c mode %d ichan %d",
'A' + jade, mode, bc);
debugl1(cs, tmp);
}
bcs->mode = mode;
bcs->channel = bc;
cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (mode == L1_MODE_TRANS ? jadeMODE_TMO:0x00));
cs->BC_Write_Reg(cs, jade, jade_HDLC_CCR0, (jadeCCR0_PU|jadeCCR0_ITF));
cs->BC_Write_Reg(cs, jade, jade_HDLC_CCR1, 0x00);
jade_write_indirect(cs, jade_HDLC1SERRXPATH, 0x08);
jade_write_indirect(cs, jade_HDLC2SERRXPATH, 0x08);
jade_write_indirect(cs, jade_HDLC1SERTXPATH, 0x00);
jade_write_indirect(cs, jade_HDLC2SERTXPATH, 0x00);
cs->BC_Write_Reg(cs, jade, jade_HDLC_XCCR, 0x07);
cs->BC_Write_Reg(cs, jade, jade_HDLC_RCCR, 0x07);
if (bc == 0) {
cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAX, 0x00);
cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAR, 0x00);
} else {
cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAX, 0x04);
cs->BC_Write_Reg(cs, jade, jade_HDLC_TSAR, 0x04);
}
switch (mode) {
case (L1_MODE_NULL):
cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, jadeMODE_TMO);
break;
case (L1_MODE_TRANS):
cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (jadeMODE_TMO|jadeMODE_RAC|jadeMODE_XAC));
break;
case (L1_MODE_HDLC):
cs->BC_Write_Reg(cs, jade, jade_HDLC_MODE, (jadeMODE_RAC|jadeMODE_XAC));
break;
}
if (mode) {
cs->BC_Write_Reg(cs, jade, jade_HDLC_RCMD, (jadeRCMD_RRES|jadeRCMD_RMC));
cs->BC_Write_Reg(cs, jade, jade_HDLC_XCMD, jadeXCMD_XRES);
/* Unmask ints */
cs->BC_Write_Reg(cs, jade, jade_HDLC_IMR, 0xF8);
}
else
/* Mask ints */
cs->BC_Write_Reg(cs, jade, jade_HDLC_IMR, 0x00);
}
static void
jade_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;
test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
bcs->hw.hscx.count = 0;
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 "jade_l2l1: this shouldn't happen\n");
} else {
test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
bcs->tx_skb = skb;
bcs->hw.hscx.count = 0;
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);
modejade(bcs, st->l1.mode, st->l1.bc);
spin_unlock_irqrestore(&bcs->cs->lock, flags);
l1_msg_b(st, pr, arg);
break;
case (PH_DEACTIVATE | REQUEST):
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);
modejade(bcs, 0, st->l1.bc);
spin_unlock_irqrestore(&bcs->cs->lock, flags);
st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
break;
}
}
static void
close_jadestate(struct BCState *bcs)
{
modejade(bcs, 0, bcs->channel);
if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
kfree(bcs->hw.hscx.rcvbuf);
bcs->hw.hscx.rcvbuf = NULL;
kfree(bcs->blog);
bcs->blog = 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_jadestate(struct IsdnCardState *cs, struct BCState *bcs)
{
if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
if (!(bcs->hw.hscx.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
printk(KERN_WARNING
"HiSax: No memory for hscx.rcvbuf\n");
test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
return (1);
}
if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
printk(KERN_WARNING
"HiSax: No memory for bcs->blog\n");
test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
kfree(bcs->hw.hscx.rcvbuf);
bcs->hw.hscx.rcvbuf = NULL;
return (2);
}
skb_queue_head_init(&bcs->rqueue);
skb_queue_head_init(&bcs->squeue);
}
bcs->tx_skb = NULL;
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
bcs->event = 0;
bcs->hw.hscx.rcvidx = 0;
bcs->tx_cnt = 0;
return (0);
}
static int
setstack_jade(struct PStack *st, struct BCState *bcs)
{
bcs->channel = st->l1.bc;
if (open_jadestate(st->l1.hardware, bcs))
return (-1);
st->l1.bcs = bcs;
st->l2.l2l1 = jade_l2l1;
setstack_manager(st);
bcs->st = st;
setstack_l1_B(st);
return (0);
}
void __init
clear_pending_jade_ints(struct IsdnCardState *cs)
{
int val;
char tmp[64];
cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR, 0x00);
cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR, 0x00);
val = cs->BC_Read_Reg(cs, 1, jade_HDLC_ISR);
sprintf(tmp, "jade B ISTA %x", val);
debugl1(cs, tmp);
val = cs->BC_Read_Reg(cs, 0, jade_HDLC_ISR);
sprintf(tmp, "jade A ISTA %x", val);
debugl1(cs, tmp);
val = cs->BC_Read_Reg(cs, 1, jade_HDLC_STAR);
sprintf(tmp, "jade B STAR %x", val);
debugl1(cs, tmp);
val = cs->BC_Read_Reg(cs, 0, jade_HDLC_STAR);
sprintf(tmp, "jade A STAR %x", val);
debugl1(cs, tmp);
/* Unmask ints */
cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR, 0xF8);
cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR, 0xF8);
}
void __init
initjade(struct IsdnCardState *cs)
{
cs->bcs[0].BC_SetStack = setstack_jade;
cs->bcs[1].BC_SetStack = setstack_jade;
cs->bcs[0].BC_Close = close_jadestate;
cs->bcs[1].BC_Close = close_jadestate;
cs->bcs[0].hw.hscx.hscx = 0;
cs->bcs[1].hw.hscx.hscx = 1;
/* Stop DSP audio tx/rx */
jade_write_indirect(cs, 0x11, 0x0f);
jade_write_indirect(cs, 0x17, 0x2f);
/* Transparent Mode, RxTx inactive, No Test, No RFS/TFS */
cs->BC_Write_Reg(cs, 0, jade_HDLC_MODE, jadeMODE_TMO);
cs->BC_Write_Reg(cs, 1, jade_HDLC_MODE, jadeMODE_TMO);
/* Power down, 1-Idle, RxTx least significant bit first */
cs->BC_Write_Reg(cs, 0, jade_HDLC_CCR0, 0x00);
cs->BC_Write_Reg(cs, 1, jade_HDLC_CCR0, 0x00);
/* Mask all interrupts */
cs->BC_Write_Reg(cs, 0, jade_HDLC_IMR, 0x00);
cs->BC_Write_Reg(cs, 1, jade_HDLC_IMR, 0x00);
/* Setup host access to hdlc controller */
jade_write_indirect(cs, jade_HDLCCNTRACCESS, (jadeINDIRECT_HAH1|jadeINDIRECT_HAH2));
/* Unmask HDLC int (don<6F>t forget DSP int later on)*/
cs->BC_Write_Reg(cs, -1,jade_INT, (jadeINT_HDLC1|jadeINT_HDLC2));
/* once again TRANSPARENT */
modejade(cs->bcs, 0, 0);
modejade(cs->bcs + 1, 0, 0);
}
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