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Commit 4c942d72 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Linus Torvalds
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[PATCH] Q40/Q60 IRQ updates from 2.4.x 

Q40/Q60 IRQ updates from 2.4.x
parent dfca615d
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Showing with 96 additions and 153 deletions
arch/m68k/q40/q40ints.c
View file @ 4c942d72
......@@ -207,7 +207,6 @@ void q40_process_int (int level, struct pt_regs *fp)
int ql_ticks; /* 200Hz ticks since last jiffie */
static int sound_ticks;
short q40rtc_oldsecs;
#define SVOL 45
......@@ -234,7 +233,6 @@ static void (*q40_timer_routine)(int, void *, struct pt_regs *);
static void q40_timer_int (int irq, void * dev, struct pt_regs * regs)
{
#if (HZ==100)
ql_ticks = ql_ticks ? 0 : 1;
if (sound_ticks)
{
......@@ -243,16 +241,9 @@ static void q40_timer_int (int irq, void * dev, struct pt_regs * regs)
*DAC_LEFT=sval;
*DAC_RIGHT=sval;
}
#if defined(CONFIG_Q40RTC) || defined(CONFIG_GEN_RTC)
if (gen_rtc_irq_ctrl && (q40rtc_oldsecs != Q40_RTC_SECS))
{
q40rtc_oldsecs = Q40_RTC_SECS;
gen_rtc_irq_flags = RTC_UIE;
gen_rtc_interrupt(0);
}
#endif
if (ql_ticks) return;
#endif
q40_timer_routine(irq, dev, regs);
}
......@@ -261,30 +252,14 @@ void q40_sched_init (void (*timer_routine)(int, void *, struct pt_regs *))
int timer_irq;
q40_timer_routine = timer_routine;
#if (HZ==10000)
timer_irq=Q40_IRQ_SAMPLE;
#else
timer_irq=Q40_IRQ_FRAME;
#endif
/*printk("registering sched/timer IRQ %d, handler %p\n", timer_irq,q40_timer_int);*/
/*printk("timer routine %p\n",q40_timer_routine);*/
if (request_irq(timer_irq, q40_timer_int, 0,
"timer", q40_timer_int))
panic ("Couldn't register timer int");
#if (HZ==10000)
master_outb(SAMPLE_LOW,SAMPLE_RATE_REG);
master_outb(-1,SAMPLE_CLEAR_REG);
master_outb(1,SAMPLE_ENABLE_REG);
#else
master_outb(-1,FRAME_CLEAR_REG); /* not necessary ? */
#if (HZ==100)
master_outb(-1,FRAME_CLEAR_REG);
master_outb( 1,FRAME_RATE_REG);
#endif
#endif
}
......@@ -297,20 +272,20 @@ void q40_sched_init (void (*timer_routine)(int, void *, struct pt_regs *))
struct IRQ_TABLE{ unsigned mask; int irq ;};
#if 0
static struct IRQ_TABLE iirqs[]={
{IRQ_FRAME_MASK,Q40_IRQ_FRAME},
{IRQ_KEYB_MASK,Q40_IRQ_KEYBOARD},
{Q40_IRQ_FRAME_MASK,Q40_IRQ_FRAME},
{Q40_IRQ_KEYB_MASK,Q40_IRQ_KEYBOARD},
{0,0}};
#endif
static struct IRQ_TABLE eirqs[]={
{IRQ3_MASK,3}, /* ser 1 */
{IRQ4_MASK,4}, /* ser 2 */
{IRQ14_MASK,14}, /* IDE 1 */
{IRQ15_MASK,15}, /* IDE 2 */
{IRQ6_MASK,6}, /* floppy */
{IRQ7_MASK,7}, /* par */
{Q40_IRQ3_MASK,3}, /* ser 1 */
{Q40_IRQ4_MASK,4}, /* ser 2 */
{Q40_IRQ14_MASK,14}, /* IDE 1 */
{Q40_IRQ15_MASK,15}, /* IDE 2 */
{Q40_IRQ6_MASK,6}, /* floppy, handled elsewhere */
{Q40_IRQ7_MASK,7}, /* par */
{IRQ5_MASK,5},
{IRQ10_MASK,10},
{Q40_IRQ5_MASK,5},
{Q40_IRQ10_MASK,10},
......@@ -325,7 +300,7 @@ static int ccleirq=60; /* ISA dev IRQ's*/
#define IRQ_INPROGRESS 1
/*static unsigned short saved_mask;*/
static int do_tint=0;
//static int do_tint=0;
#define DEBUG_Q40INT
/*#define IP_USE_DISABLE *//* would be nice, but crashes ???? */
......@@ -337,101 +312,82 @@ static int aliased_irq=0; /* how many times inside handler ?*/
/* got level 2 interrupt, dispatch to ISA or keyboard/timer IRQs */
void q40_irq2_handler (int vec, void *devname, struct pt_regs *fp)
{
unsigned mir;
unsigned mer;
int irq,i;
unsigned mir, mer;
int irq,i;
repeat:
mir=master_inb(IIRQ_REG);
if (mir&IRQ_FRAME_MASK)
{ /* dont loose ticks */
do_tint++;
master_outb(-1,FRAME_CLEAR_REG);
}
if ((mir&IRQ_SER_MASK) || (mir&IRQ_EXT_MASK))
{
/* some ISA dev caused the int */
mer=master_inb(EIRQ_REG);
for (i=0; eirqs[i].mask; i++)
{
if (mer&(eirqs[i].mask))
{
irq=eirqs[i].irq;
if (mir&Q40_IRQ_FRAME_MASK) {
irq_tab[Q40_IRQ_FRAME].count++;
irq_tab[Q40_IRQ_FRAME].handler(Q40_IRQ_FRAME,irq_tab[Q40_IRQ_FRAME].dev_id,fp);
master_outb(-1,FRAME_CLEAR_REG);
}
if ((mir&Q40_IRQ_SER_MASK) || (mir&Q40_IRQ_EXT_MASK)) {
mer=master_inb(EIRQ_REG);
for (i=0; eirqs[i].mask; i++) {
if (mer&(eirqs[i].mask)) {
irq=eirqs[i].irq;
/*
* There is a little mess wrt which IRQ really caused this irq request. The
* main problem is that IIRQ_REG and EIRQ_REG reflect the state when they
* are read - which is long after the request came in. In theory IRQs should
* not just go away but they occassionally do
*/
if (irq>4 && irq<=15 && mext_disabled)
{
/*aliased_irq++;*/
goto iirq;
}
if (irq_tab[irq].handler == q40_defhand )
{
printk("handler for IRQ %d not defined\n",irq);
continue; /* ignore uninited INTs :-( */
}
if ( irq_tab[irq].state & IRQ_INPROGRESS )
{
/* some handlers do local_irq_enable() for irq latency reasons, */
/* however reentering an active irq handler is not permitted */
if (irq>4 && irq<=15 && mext_disabled) {
/*aliased_irq++;*/
goto iirq;
}
if (irq_tab[irq].handler == q40_defhand ) {
printk("handler for IRQ %d not defined\n",irq);
continue; /* ignore uninited INTs :-( */
}
if ( irq_tab[irq].state & IRQ_INPROGRESS ) {
/* some handlers do sti() for irq latency reasons, */
/* however reentering an active irq handler is not permitted */
#ifdef IP_USE_DISABLE
/* in theory this is the better way to do it because it still */
/* lets through eg the serial irqs, unfortunately it crashes */
disable_irq(irq);
disabled=1;
/* in theory this is the better way to do it because it still */
/* lets through eg the serial irqs, unfortunately it crashes */
disable_irq(irq);
disabled=1;
#else
/*printk("IRQ_INPROGRESS detected for irq %d, disabling - %s disabled\n",irq,disabled ? "already" : "not yet"); */
fp->sr = (((fp->sr) & (~0x700))+0x200);
disabled=1;
/*printk("IRQ_INPROGRESS detected for irq %d, disabling - %s disabled\n",irq,disabled ? "already" : "not yet"); */
fp->sr = (((fp->sr) & (~0x700))+0x200);
disabled=1;
#endif
goto iirq;
}
irq_tab[irq].count++;
irq_tab[irq].state |= IRQ_INPROGRESS;
irq_tab[irq].handler(irq,irq_tab[irq].dev_id,fp);
irq_tab[irq].state &= ~IRQ_INPROGRESS;
/* naively enable everything, if that fails than */
/* this function will be reentered immediately thus */
/* getting another chance to disable the IRQ */
if ( disabled )
{
goto iirq;
}
irq_tab[irq].count++;
irq_tab[irq].state |= IRQ_INPROGRESS;
irq_tab[irq].handler(irq,irq_tab[irq].dev_id,fp);
irq_tab[irq].state &= ~IRQ_INPROGRESS;
/* naively enable everything, if that fails than */
/* this function will be reentered immediately thus */
/* getting another chance to disable the IRQ */
if ( disabled ) {
#ifdef IP_USE_DISABLE
if (irq>4){
disabled=0;
enable_irq(irq);}
if (irq>4){
disabled=0;
enable_irq(irq);}
#else
disabled=0;
/*printk("reenabling irq %d\n",irq); */
disabled=0;
/*printk("reenabling irq %d\n",irq); */
#endif
}
goto repeat; /* return; */
}
// used to do 'goto repeat;' her, this delayed bh processing too long
return;
}
}
if (mer && ccleirq>0 && !aliased_irq)
printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer),ccleirq--;
}
iirq:
mir=master_inb(IIRQ_REG);
if (mir&IRQ_FRAME_MASK)
{
do_tint++;
master_outb(-1,FRAME_CLEAR_REG);
}
for(;do_tint>0;do_tint--)
{
irq_tab[Q40_IRQ_FRAME].count++;
irq_tab[Q40_IRQ_FRAME].handler(Q40_IRQ_FRAME,irq_tab[Q40_IRQ_FRAME].dev_id,fp);
}
if (mir&IRQ_KEYB_MASK) /* may handle it even if actually disabled*/
{
irq_tab[Q40_IRQ_KEYBOARD].count++;
irq_tab[Q40_IRQ_KEYBOARD].handler(Q40_IRQ_KEYBOARD,irq_tab[Q40_IRQ_KEYBOARD].dev_id,fp);
}
if (mer && ccleirq>0 && !aliased_irq)
printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer),ccleirq--;
}
iirq:
mir=master_inb(IIRQ_REG);
if (mir&Q40_IRQ_KEYB_MASK) {
irq_tab[Q40_IRQ_KEYBOARD].count++;
irq_tab[Q40_IRQ_KEYBOARD].handler(Q40_IRQ_KEYBOARD,irq_tab[Q40_IRQ_KEYBOARD].dev_id,fp);
}
}
int show_q40_interrupts (struct seq_file *p, void *v)
......@@ -453,25 +409,16 @@ int show_q40_interrupts (struct seq_file *p, void *v)
static void q40_defhand (int irq, void *dev_id, struct pt_regs *fp)
{
#if 0
printk ("Unknown q40 interrupt 0x%02x\n", irq);
#endif
}
static void sys_default_handler(int lev, void *dev_id, struct pt_regs *regs)
{
#if 0
if (ints_inited)
#endif
printk ("Uninitialised interrupt level %d\n", lev);
#if 0
else
printk ("Interrupt before interrupt initialisation\n");
#endif
printk ("Uninitialised interrupt level %d\n", lev);
}
void (*q40_sys_default_handler[SYS_IRQS]) (int, void *, struct pt_regs *) = {
sys_default_handler,sys_default_handler,sys_default_handler,sys_default_handler,
sys_default_handler,sys_default_handler,sys_default_handler,sys_default_handler
sys_default_handler,sys_default_handler,sys_default_handler,sys_default_handler,
sys_default_handler,sys_default_handler,sys_default_handler,sys_default_handler
};
......@@ -491,16 +438,15 @@ void q40_enable_irq (unsigned int irq)
void q40_disable_irq (unsigned int irq)
{
/* disable ISA iqs : only do something if the driver has been
* verified to be Q40 "compatible" - right now IDE, NE2K
* Any driver should not attempt to sleep accross disable_irq !!
*/
* verified to be Q40 "compatible" - right now IDE, NE2K
* Any driver should not attempt to sleep accross disable_irq !!
*/
if ( irq>=5 && irq<=15 )
{
if ( irq>=5 && irq<=15 ) {
master_outb(0,EXT_ENABLE_REG);
mext_disabled++;
if (mext_disabled>1) printk("disable_irq nesting count %d\n",mext_disabled);
}
mext_disabled++;
if (mext_disabled>1) printk("disable_irq nesting count %d\n",mext_disabled);
}
}
unsigned long q40_probe_irq_on (void)
......@@ -515,4 +461,5 @@ int q40_probe_irq_off (unsigned long irqs)
/*
* Local variables:
* compile-command: "m68k-linux-gcc -D__KERNEL__ -I/home/rz/lx/linux-2.2.6/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -ffixed-a2 -m68040 -c -o q40ints.o q40ints.c"
* End:
*/
include/asm-m68k/q40ints.h
View file @ 4c942d72
......@@ -11,19 +11,19 @@
/* masks for interrupt regiosters*/
/* internal, IIRQ_REG */
#define IRQ_KEYB_MASK (2)
#define IRQ_SER_MASK (1<<2)
#define IRQ_FRAME_MASK (1<<3)
#define IRQ_EXT_MASK (1<<4) /* is a EIRQ */
#define Q40_IRQ_KEYB_MASK (2)
#define Q40_IRQ_SER_MASK (1<<2)
#define Q40_IRQ_FRAME_MASK (1<<3)
#define Q40_IRQ_EXT_MASK (1<<4) /* is a EIRQ */
/* eirq, EIRQ_REG */
#define IRQ3_MASK (1)
#define IRQ4_MASK (1<<1)
#define IRQ5_MASK (1<<2)
#define IRQ6_MASK (1<<3)
#define IRQ7_MASK (1<<4)
#define IRQ10_MASK (1<<5)
#define IRQ14_MASK (1<<6)
#define IRQ15_MASK (1<<7)
#define Q40_IRQ3_MASK (1)
#define Q40_IRQ4_MASK (1<<1)
#define Q40_IRQ5_MASK (1<<2)
#define Q40_IRQ6_MASK (1<<3)
#define Q40_IRQ7_MASK (1<<4)
#define Q40_IRQ10_MASK (1<<5)
#define Q40_IRQ14_MASK (1<<6)
#define Q40_IRQ15_MASK (1<<7)
extern unsigned long q40_probe_irq_on (void);
extern int q40_probe_irq_off (unsigned long irqs);
include/asm-m68k/rtc.h
View file @ 4c942d72
......@@ -17,10 +17,6 @@
/* a few implementation details for the emulation : */
extern unsigned gen_rtc_irq_flags; /* which sort(s) of interrupts caused int */
extern unsigned gen_rtc_irq_ctrl; /* are enabled */
extern short q40rtc_oldsecs;
#define RTC_PIE 0x40 /* periodic interrupt enable */
#define RTC_AIE 0x20 /* alarm interrupt enable */
#define RTC_UIE 0x10 /* update-finished interrupt enable */
......
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