Revision fc3501d411d34823fb9be248a95a0c44f945866f authored by Sven Wegener on 11 February 2009, 21:04:23 UTC, committed by Linus Torvalds on 11 February 2009, 22:25:35 UTC
We need to pass an unsigned long as the minimum, because it gets casted to an unsigned long in the sysctl handler. If we pass an int, we'll access four more bytes on 64bit arches, resulting in a random minimum value. [rientjes@google.com: fix type of `old_bytes'] Signed-off-by: Sven Wegener <sven.wegener@stealer.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 35887b1
s0box.c
/* $Id: s0box.c,v 2.6.2.4 2004/01/13 23:48:39 keil Exp $
*
* low level stuff for Creatix S0BOX
*
* Author Enrik Berkhan
* Copyright by Enrik Berkhan <enrik@starfleet.inka.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 "isac.h"
#include "hscx.h"
#include "isdnl1.h"
static const char *s0box_revision = "$Revision: 2.6.2.4 $";
static inline void
writereg(unsigned int padr, signed int addr, u_char off, u_char val) {
outb_p(0x1c,padr+2);
outb_p(0x14,padr+2);
outb_p((addr+off)&0x7f,padr);
outb_p(0x16,padr+2);
outb_p(val,padr);
outb_p(0x17,padr+2);
outb_p(0x14,padr+2);
outb_p(0x1c,padr+2);
}
static u_char nibtab[] = { 1, 9, 5, 0xd, 3, 0xb, 7, 0xf,
0, 0, 0, 0, 0, 0, 0, 0,
0, 8, 4, 0xc, 2, 0xa, 6, 0xe } ;
static inline u_char
readreg(unsigned int padr, signed int addr, u_char off) {
register u_char n1, n2;
outb_p(0x1c,padr+2);
outb_p(0x14,padr+2);
outb_p((addr+off)|0x80,padr);
outb_p(0x16,padr+2);
outb_p(0x17,padr+2);
n1 = (inb_p(padr+1) >> 3) & 0x17;
outb_p(0x16,padr+2);
n2 = (inb_p(padr+1) >> 3) & 0x17;
outb_p(0x14,padr+2);
outb_p(0x1c,padr+2);
return nibtab[n1] | (nibtab[n2] << 4);
}
static inline void
read_fifo(unsigned int padr, signed int adr, u_char * data, int size)
{
int i;
register u_char n1, n2;
outb_p(0x1c, padr+2);
outb_p(0x14, padr+2);
outb_p(adr|0x80, padr);
outb_p(0x16, padr+2);
for (i=0; i<size; i++) {
outb_p(0x17, padr+2);
n1 = (inb_p(padr+1) >> 3) & 0x17;
outb_p(0x16,padr+2);
n2 = (inb_p(padr+1) >> 3) & 0x17;
*(data++)=nibtab[n1] | (nibtab[n2] << 4);
}
outb_p(0x14,padr+2);
outb_p(0x1c,padr+2);
return;
}
static inline void
write_fifo(unsigned int padr, signed int adr, u_char * data, int size)
{
int i;
outb_p(0x1c, padr+2);
outb_p(0x14, padr+2);
outb_p(adr&0x7f, padr);
for (i=0; i<size; i++) {
outb_p(0x16, padr+2);
outb_p(*(data++), padr);
outb_p(0x17, padr+2);
}
outb_p(0x14,padr+2);
outb_p(0x1c,padr+2);
return;
}
/* Interface functions */
static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
}
static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset, value);
}
static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
}
static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
}
static u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset));
}
static void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset, value);
}
/*
* fast interrupt HSCX stuff goes here
*/
#define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg)
#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg, data)
#define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
#define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
#include "hscx_irq.c"
static irqreturn_t
s0box_interrupt(int intno, void *dev_id)
{
#define MAXCOUNT 5
struct IsdnCardState *cs = dev_id;
u_char val;
u_long flags;
int count = 0;
spin_lock_irqsave(&cs->lock, flags);
val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
Start_HSCX:
if (val)
hscx_int_main(cs, val);
val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
Start_ISAC:
if (val)
isac_interrupt(cs, val);
count++;
val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
if (val && count < MAXCOUNT) {
if (cs->debug & L1_DEB_HSCX)
debugl1(cs, "HSCX IntStat after IntRoutine");
goto Start_HSCX;
}
val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
if (val && count < MAXCOUNT) {
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ISAC IntStat after IntRoutine");
goto Start_ISAC;
}
if (count >= MAXCOUNT)
printk(KERN_WARNING "S0Box: more than %d loops in s0box_interrupt\n", count);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0xFF);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0x0);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
spin_unlock_irqrestore(&cs->lock, flags);
return IRQ_HANDLED;
}
static void
release_io_s0box(struct IsdnCardState *cs)
{
release_region(cs->hw.teles3.cfg_reg, 8);
}
static int
S0Box_card_msg(struct IsdnCardState *cs, int mt, void *arg)
{
u_long flags;
switch (mt) {
case CARD_RESET:
break;
case CARD_RELEASE:
release_io_s0box(cs);
break;
case CARD_INIT:
spin_lock_irqsave(&cs->lock, flags);
inithscxisac(cs, 3);
spin_unlock_irqrestore(&cs->lock, flags);
break;
case CARD_TEST:
break;
}
return(0);
}
int __devinit
setup_s0box(struct IsdnCard *card)
{
struct IsdnCardState *cs = card->cs;
char tmp[64];
strcpy(tmp, s0box_revision);
printk(KERN_INFO "HiSax: S0Box IO driver Rev. %s\n", HiSax_getrev(tmp));
if (cs->typ != ISDN_CTYPE_S0BOX)
return (0);
cs->hw.teles3.cfg_reg = card->para[1];
cs->hw.teles3.hscx[0] = -0x20;
cs->hw.teles3.hscx[1] = 0x0;
cs->hw.teles3.isac = 0x20;
cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
cs->irq = card->para[0];
if (!request_region(cs->hw.teles3.cfg_reg,8, "S0Box parallel I/O")) {
printk(KERN_WARNING "HiSax: S0Box ports %x-%x already in use\n",
cs->hw.teles3.cfg_reg,
cs->hw.teles3.cfg_reg + 7);
return 0;
}
printk(KERN_INFO "HiSax: S0Box config irq:%d isac:0x%x cfg:0x%x\n",
cs->irq,
cs->hw.teles3.isac, cs->hw.teles3.cfg_reg);
printk(KERN_INFO "HiSax: hscx A:0x%x hscx B:0x%x\n",
cs->hw.teles3.hscx[0], cs->hw.teles3.hscx[1]);
setup_isac(cs);
cs->readisac = &ReadISAC;
cs->writeisac = &WriteISAC;
cs->readisacfifo = &ReadISACfifo;
cs->writeisacfifo = &WriteISACfifo;
cs->BC_Read_Reg = &ReadHSCX;
cs->BC_Write_Reg = &WriteHSCX;
cs->BC_Send_Data = &hscx_fill_fifo;
cs->cardmsg = &S0Box_card_msg;
cs->irq_func = &s0box_interrupt;
ISACVersion(cs, "S0Box:");
if (HscxVersion(cs, "S0Box:")) {
printk(KERN_WARNING
"S0Box: wrong HSCX versions check IO address\n");
release_io_s0box(cs);
return (0);
}
return (1);
}
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