diff options
| -rw-r--r-- | arch/m68k/kernel/entry.S | 11 | ||||
| -rw-r--r-- | arch/m68k/q40/config.c | 11 | ||||
| -rw-r--r-- | arch/m68k/q40/q40ints.c | 464 |
3 files changed, 169 insertions, 317 deletions
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 48cccc5..449b62b 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -205,18 +205,9 @@ ENTRY(auto_inthandler) movel %sp,%sp@- movel %d0,%sp@- | put vector # on stack -#if defined(MACH_Q40_ONLY) && defined(CONFIG_BLK_DEV_FD) - btstb #4,0xff000000 | Q40 floppy needs very special treatment ... - jbeq 1f - btstb #3,0xff000004 - jbeq 1f - jbsr floppy_hardint - jbra 3f -1: -#endif auto_irqhandler_fixup = . + 2 jsr m68k_handle_int | process the IRQ -3: addql #8,%sp | pop parameters off stack + addql #8,%sp | pop parameters off stack ret_from_interrupt: subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) diff --git a/arch/m68k/q40/config.c b/arch/m68k/q40/config.c index 01fd662..efa52d3 100644 --- a/arch/m68k/q40/config.c +++ b/arch/m68k/q40/config.c @@ -38,13 +38,8 @@ extern irqreturn_t q40_process_int (int level, struct pt_regs *regs); extern void q40_init_IRQ (void); -extern void q40_free_irq (unsigned int, void *); -extern int show_q40_interrupts (struct seq_file *, void *); -extern void q40_enable_irq (unsigned int); -extern void q40_disable_irq (unsigned int); static void q40_get_model(char *model); static int q40_get_hardware_list(char *buffer); -extern int q40_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id); extern void q40_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); extern unsigned long q40_gettimeoffset (void); @@ -174,12 +169,6 @@ void __init config_q40(void) mach_set_clock_mmss = q40_set_clock_mmss; mach_reset = q40_reset; - mach_free_irq = q40_free_irq; - mach_process_int = q40_process_int; - mach_get_irq_list = show_q40_interrupts; - mach_request_irq = q40_request_irq; - enable_irq = q40_enable_irq; - disable_irq = q40_disable_irq; mach_get_model = q40_get_model; mach_get_hardware_list = q40_get_hardware_list; diff --git a/arch/m68k/q40/q40ints.c b/arch/m68k/q40/q40ints.c index ff80cba..472f41c 100644 --- a/arch/m68k/q40/q40ints.c +++ b/arch/m68k/q40/q40ints.c @@ -14,13 +14,8 @@ #include <linux/types.h> #include <linux/kernel.h> #include <linux/errno.h> -#include <linux/string.h> -#include <linux/sched.h> -#include <linux/seq_file.h> #include <linux/interrupt.h> -#include <linux/hardirq.h> -#include <asm/rtc.h> #include <asm/ptrace.h> #include <asm/system.h> #include <asm/irq.h> @@ -39,28 +34,37 @@ * */ -extern int ints_inited; +static void q40_irq_handler(unsigned int, struct pt_regs *fp); +static void q40_enable_irq(unsigned int); +static void q40_disable_irq(unsigned int); +unsigned short q40_ablecount[35]; +unsigned short q40_state[35]; -irqreturn_t q40_irq2_handler (int, void *, struct pt_regs *fp); - - -static irqreturn_t q40_defhand (int irq, void *dev_id, struct pt_regs *fp); - - -#define DEVNAME_SIZE 24 +static int q40_irq_startup(unsigned int irq) +{ + /* test for ISA ints not implemented by HW */ + switch (irq) { + case 1: case 2: case 8: case 9: + case 11: case 12: case 13: + printk("%s: ISA IRQ %d not implemented by HW\n", __FUNCTION__, irq); + return -ENXIO; + } + return 0; +} -static struct q40_irq_node { - irqreturn_t (*handler)(int, void *, struct pt_regs *); - unsigned long flags; - void *dev_id; - /* struct q40_irq_node *next;*/ - char devname[DEVNAME_SIZE]; - unsigned count; - unsigned short state; -} irq_tab[Q40_IRQ_MAX+1]; +static void q40_irq_shutdown(unsigned int irq) +{ +} -short unsigned q40_ablecount[Q40_IRQ_MAX+1]; +static struct irq_controller q40_irq_controller = { + .name = "q40", + .lock = SPIN_LOCK_UNLOCKED, + .startup = q40_irq_startup, + .shutdown = q40_irq_shutdown, + .enable = q40_enable_irq, + .disable = q40_disable_irq, +}; /* * void q40_init_IRQ (void) @@ -73,139 +77,29 @@ short unsigned q40_ablecount[Q40_IRQ_MAX+1]; * the q40 IRQ handling routines. */ -static int disabled=0; +static int disabled; -void q40_init_IRQ (void) +void q40_init_IRQ(void) { - int i; - - disabled=0; - for (i = 0; i <= Q40_IRQ_MAX; i++) { - irq_tab[i].handler = q40_defhand; - irq_tab[i].flags = 0; - irq_tab[i].dev_id = NULL; - /* irq_tab[i].next = NULL;*/ - irq_tab[i].devname[0] = 0; - irq_tab[i].count = 0; - irq_tab[i].state =0; - q40_ablecount[i]=0; /* all enabled */ - } + m68k_setup_irq_controller(&q40_irq_controller, 1, Q40_IRQ_MAX); /* setup handler for ISA ints */ - cpu_request_irq(IRQ_AUTO_2, q40_irq2_handler, 0, - "q40 ISA and master chip", NULL); + m68k_setup_auto_interrupt(q40_irq_handler); + + m68k_irq_startup(IRQ_AUTO_2); + m68k_irq_startup(IRQ_AUTO_4); /* now enable some ints.. */ - master_outb(1,EXT_ENABLE_REG); /* ISA IRQ 5-15 */ + master_outb(1, EXT_ENABLE_REG); /* ISA IRQ 5-15 */ /* make sure keyboard IRQ is disabled */ - master_outb(0,KEY_IRQ_ENABLE_REG); + master_outb(0, KEY_IRQ_ENABLE_REG); } -int q40_request_irq(unsigned int irq, - irqreturn_t (*handler)(int, void *, struct pt_regs *), - unsigned long flags, const char *devname, void *dev_id) -{ - /*printk("q40_request_irq %d, %s\n",irq,devname);*/ - - if (irq > Q40_IRQ_MAX || (irq>15 && irq<32)) { - printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname); - return -ENXIO; - } - - /* test for ISA ints not implemented by HW */ - switch (irq) - { - case 1: case 2: case 8: case 9: - case 12: case 13: - printk("%s: ISA IRQ %d from %s not implemented by HW\n", __FUNCTION__, irq, devname); - return -ENXIO; - case 11: - printk("warning IRQ 10 and 11 not distinguishable\n"); - irq=10; - default: - ; - } - - if (irq<Q40_IRQ_SAMPLE) - { - if (irq_tab[irq].dev_id != NULL) - { - printk("%s: IRQ %d from %s is not replaceable\n", - __FUNCTION__, irq, irq_tab[irq].devname); - return -EBUSY; - } - /*printk("IRQ %d set to handler %p\n",irq,handler);*/ - if (dev_id==NULL) - { - printk("WARNING: dev_id == NULL in request_irq\n"); - dev_id=(void*)1; - } - irq_tab[irq].handler = handler; - irq_tab[irq].flags = flags; - irq_tab[irq].dev_id = dev_id; - strlcpy(irq_tab[irq].devname,devname,sizeof(irq_tab[irq].devname)); - irq_tab[irq].state = 0; - return 0; - } - else { - /* Q40_IRQ_SAMPLE :somewhat special actions required here ..*/ - cpu_request_irq(4, handler, flags, devname, dev_id); - cpu_request_irq(6, handler, flags, devname, dev_id); - return 0; - } -} - -void q40_free_irq(unsigned int irq, void *dev_id) -{ - if (irq > Q40_IRQ_MAX || (irq>15 && irq<32)) { - printk("%s: Incorrect IRQ %d, dev_id %x \n", __FUNCTION__, irq, (unsigned)dev_id); - return; - } - - /* test for ISA ints not implemented by HW */ - switch (irq) - { - case 1: case 2: case 8: case 9: - case 12: case 13: - printk("%s: ISA IRQ %d from %x invalid\n", __FUNCTION__, irq, (unsigned)dev_id); - return; - case 11: irq=10; - default: - ; - } - - if (irq<Q40_IRQ_SAMPLE) - { - if (irq_tab[irq].dev_id != dev_id) - printk("%s: Removing probably wrong IRQ %d from %s\n", - __FUNCTION__, irq, irq_tab[irq].devname); - - irq_tab[irq].handler = q40_defhand; - irq_tab[irq].flags = 0; - irq_tab[irq].dev_id = NULL; - /* irq_tab[irq].devname = NULL; */ - /* do not reset state !! */ - } - else - { /* == Q40_IRQ_SAMPLE */ - cpu_free_irq(4, dev_id); - cpu_free_irq(6, dev_id); - } -} - - -irqreturn_t q40_process_int (int level, struct pt_regs *fp) -{ - printk("unexpected interrupt vec=%x, pc=%lx, d0=%lx, d0_orig=%lx, d1=%lx, d2=%lx\n", - level, fp->pc, fp->d0, fp->orig_d0, fp->d1, fp->d2); - printk("\tIIRQ_REG = %x, EIRQ_REG = %x\n",master_inb(IIRQ_REG),master_inb(EIRQ_REG)); - return IRQ_HANDLED; -} /* * this stuff doesn't really belong here.. -*/ + */ int ql_ticks; /* 200Hz ticks since last jiffie */ static int sound_ticks; @@ -214,54 +108,53 @@ static int sound_ticks; void q40_mksound(unsigned int hz, unsigned int ticks) { - /* for now ignore hz, except that hz==0 switches off sound */ - /* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */ - if (hz==0) - { - if (sound_ticks) - sound_ticks=1; - - *DAC_LEFT=128; - *DAC_RIGHT=128; - - return; - } - /* sound itself is done in q40_timer_int */ - if (sound_ticks == 0) sound_ticks=1000; /* pretty long beep */ - sound_ticks=ticks<<1; + /* for now ignore hz, except that hz==0 switches off sound */ + /* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */ + if (hz == 0) { + if (sound_ticks) + sound_ticks = 1; + + *DAC_LEFT = 128; + *DAC_RIGHT = 128; + + return; + } + /* sound itself is done in q40_timer_int */ + if (sound_ticks == 0) + sound_ticks = 1000; /* pretty long beep */ + sound_ticks = ticks << 1; } static irqreturn_t (*q40_timer_routine)(int, void *, struct pt_regs *); static irqreturn_t q40_timer_int (int irq, void * dev, struct pt_regs * regs) { - ql_ticks = ql_ticks ? 0 : 1; - if (sound_ticks) - { - unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL; - sound_ticks--; - *DAC_LEFT=sval; - *DAC_RIGHT=sval; - } - - if (!ql_ticks) - q40_timer_routine(irq, dev, regs); - return IRQ_HANDLED; + ql_ticks = ql_ticks ? 0 : 1; + if (sound_ticks) { + unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL; + sound_ticks--; + *DAC_LEFT=sval; + *DAC_RIGHT=sval; + } + + if (!ql_ticks) + q40_timer_routine(irq, dev, regs); + return IRQ_HANDLED; } void q40_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) { - int timer_irq; + int timer_irq; - q40_timer_routine = timer_routine; - timer_irq=Q40_IRQ_FRAME; + q40_timer_routine = timer_routine; + timer_irq = Q40_IRQ_FRAME; - if (request_irq(timer_irq, q40_timer_int, 0, + if (request_irq(timer_irq, q40_timer_int, 0, "timer", q40_timer_int)) - panic ("Couldn't register timer int"); + panic("Couldn't register timer int"); - master_outb(-1,FRAME_CLEAR_REG); - master_outb( 1,FRAME_RATE_REG); + master_outb(-1, FRAME_CLEAR_REG); + master_outb( 1, FRAME_RATE_REG); } @@ -307,153 +200,132 @@ static int mext_disabled=0; /* ext irq disabled by master chip? */ static int aliased_irq=0; /* how many times inside handler ?*/ -/* got level 2 interrupt, dispatch to ISA or keyboard/timer IRQs */ -irqreturn_t q40_irq2_handler (int vec, void *devname, struct pt_regs *fp) +/* got interrupt, dispatch to ISA or keyboard/timer IRQs */ +static void q40_irq_handler(unsigned int irq, struct pt_regs *fp) { - unsigned mir, mer; - int irq,i; + unsigned mir, mer; + int i; //repeat: - mir=master_inb(IIRQ_REG); - 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; + mir = master_inb(IIRQ_REG); +#ifdef CONFIG_BLK_DEV_FD + if ((mir & Q40_IRQ_EXT_MASK) && + (master_inb(EIRQ_REG) & Q40_IRQ6_MASK)) { + floppy_hardint(); + return; + } +#endif + switch (irq) { + case 4: + case 6: + m68k_handle_int(Q40_IRQ_SAMPLE, fp); + return; + } + if (mir & Q40_IRQ_FRAME_MASK) { + m68k_handle_int(Q40_IRQ_FRAME, 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 (q40_state[irq] & IRQ_INPROGRESS) { + /* some handlers do local_irq_enable() 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; + } + q40_state[irq] |= IRQ_INPROGRESS; + m68k_handle_int(irq, fp); + q40_state[irq] &= ~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 - } + } // used to do 'goto repeat;' here, this delayed bh processing too long - return IRQ_HANDLED; - } - } - if (mer && ccleirq>0 && !aliased_irq) - printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer),ccleirq--; - } - iirq: - mir=master_inb(IIRQ_REG); - /* should test whether keyboard irq is really enabled, doing it in defhand */ - 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); - } - return IRQ_HANDLED; -} - -int show_q40_interrupts (struct seq_file *p, void *v) -{ - int i; - - for (i = 0; i <= Q40_IRQ_MAX; i++) { - if (irq_tab[i].count) - seq_printf(p, "%sIRQ %02d: %8d %s%s\n", - (i<=15) ? "ISA-" : " " , - i, irq_tab[i].count, - irq_tab[i].devname[0] ? irq_tab[i].devname : "?", - irq_tab[i].handler == q40_defhand ? - " (now unassigned)" : ""); + return; + } + } + if (mer && ccleirq > 0 && !aliased_irq) { + printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer); + ccleirq--; + } } - return 0; -} - + iirq: + mir = master_inb(IIRQ_REG); + /* should test whether keyboard irq is really enabled, doing it in defhand */ + if (mir & Q40_IRQ_KEYB_MASK) + m68k_handle_int(Q40_IRQ_KEYBOARD, fp); -static irqreturn_t q40_defhand (int irq, void *dev_id, struct pt_regs *fp) -{ - if (irq!=Q40_IRQ_KEYBOARD) - printk ("Unknown q40 interrupt %d\n", irq); - else master_outb(-1,KEYBOARD_UNLOCK_REG); - return IRQ_NONE; + return; } - -void q40_enable_irq (unsigned int irq) +void q40_enable_irq(unsigned int irq) { - if ( irq>=5 && irq<=15 ) - { - mext_disabled--; - if (mext_disabled>0) - printk("q40_enable_irq : nested disable/enable\n"); - if (mext_disabled==0) - master_outb(1,EXT_ENABLE_REG); - } + if (irq >= 5 && irq <= 15) { + mext_disabled--; + if (mext_disabled > 0) + printk("q40_enable_irq : nested disable/enable\n"); + if (mext_disabled == 0) + master_outb(1, EXT_ENABLE_REG); + } } -void q40_disable_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 across disable_irq !! - */ - - 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); - } + /* 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 across disable_irq !! + */ + + 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); + } } -unsigned long q40_probe_irq_on (void) +unsigned long q40_probe_irq_on(void) { - printk("irq probing not working - reconfigure the driver to avoid this\n"); - return -1; + printk("irq probing not working - reconfigure the driver to avoid this\n"); + return -1; } -int q40_probe_irq_off (unsigned long irqs) +int q40_probe_irq_off(unsigned long irqs) { - return -1; + return -1; } -/* - * 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: - */ |