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[PATCH] m68k: convert atari irq code
Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roman Zippel
Linus Torvalds
parent
0aa78106c6
commit
734085651c
@ -104,6 +104,7 @@
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* the sr copy in the frame.
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*/
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#if 0
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#define NUM_INT_SOURCES (8 + NUM_ATARI_SOURCES)
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@ -133,13 +134,6 @@ static struct irqhandler irq_handler[NUM_INT_SOURCES];
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*/
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static struct irqparam irq_param[NUM_INT_SOURCES];
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/*
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* Bitmap for free interrupt vector numbers
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* (new vectors starting from 0x70 can be allocated by
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* atari_register_vme_int())
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*/
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static int free_vme_vec_bitmap;
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/* check for valid int number (complex, sigh...) */
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#define IS_VALID_INTNO(n) \
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((n) > 0 && \
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@ -301,6 +295,14 @@ __asm__ (__ALIGN_STR "\n"
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);
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for (;;);
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}
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#endif
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/*
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* Bitmap for free interrupt vector numbers
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* (new vectors starting from 0x70 can be allocated by
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* atari_register_vme_int())
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*/
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static int free_vme_vec_bitmap;
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/* GK:
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* HBL IRQ handler for Falcon. Nobody needs it :-)
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@ -313,13 +315,34 @@ __ALIGN_STR "\n\t"
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"orw #0x200,%sp@\n\t" /* set saved ipl to 2 */
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"rte");
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/* Defined in entry.S; only increments 'num_spurious' */
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asmlinkage void bad_inthandler(void);
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extern void atari_microwire_cmd( int cmd );
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extern void atari_microwire_cmd(int cmd);
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extern int atari_SCC_reset_done;
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static int atari_startup_irq(unsigned int irq)
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{
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m68k_irq_startup(irq);
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atari_turnon_irq(irq);
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atari_enable_irq(irq);
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return 0;
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}
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static void atari_shutdown_irq(unsigned int irq)
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{
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atari_disable_irq(irq);
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atari_turnoff_irq(irq);
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m68k_irq_shutdown(irq);
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}
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static struct irq_controller atari_irq_controller = {
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.name = "atari",
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.lock = SPIN_LOCK_UNLOCKED,
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.startup = atari_startup_irq,
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.shutdown = atari_shutdown_irq,
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.enable = atari_enable_irq,
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.disable = atari_disable_irq,
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};
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/*
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* void atari_init_IRQ (void)
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*
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@ -333,12 +356,8 @@ extern int atari_SCC_reset_done;
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void __init atari_init_IRQ(void)
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{
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int i;
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/* initialize the vector table */
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for (i = 0; i < NUM_INT_SOURCES; ++i) {
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vectors[IRQ_SOURCE_TO_VECTOR(i)] = bad_inthandler;
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}
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m68k_setup_user_interrupt(VEC_USER, 192, NULL);
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m68k_setup_irq_controller(&atari_irq_controller, 1, NUM_ATARI_SOURCES - 1);
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/* Initialize the MFP(s) */
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@ -378,8 +397,7 @@ void __init atari_init_IRQ(void)
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* enabled in VME mask
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*/
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tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
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}
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else {
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} else {
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/* If no SCU and no Hades, the HSYNC interrupt needs to be
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* disabled this way. (Else _inthandler in kernel/sys_call.S
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* gets overruns)
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@ -404,184 +422,6 @@ void __init atari_init_IRQ(void)
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}
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static irqreturn_t atari_call_irq_list( int irq, void *dev_id, struct pt_regs *fp )
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{
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irq_node_t *node;
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for (node = (irq_node_t *)dev_id; node; node = node->next)
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node->handler(irq, node->dev_id, fp);
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return IRQ_HANDLED;
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}
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/*
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* atari_request_irq : add an interrupt service routine for a particular
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* machine specific interrupt source.
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* If the addition was successful, it returns 0.
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*/
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int atari_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
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unsigned long flags, const char *devname, void *dev_id)
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{
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int vector;
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unsigned long oflags = flags;
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/*
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* The following is a hack to make some PCI card drivers work,
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* which set the SA_SHIRQ flag.
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*/
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flags &= ~SA_SHIRQ;
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if (flags == SA_INTERRUPT) {
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printk ("%s: SA_INTERRUPT changed to IRQ_TYPE_SLOW for %s\n",
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__FUNCTION__, devname);
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flags = IRQ_TYPE_SLOW;
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}
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if (flags < IRQ_TYPE_SLOW || flags > IRQ_TYPE_PRIO) {
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printk ("%s: Bad irq type 0x%lx <0x%lx> requested from %s\n",
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__FUNCTION__, flags, oflags, devname);
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return -EINVAL;
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}
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if (!IS_VALID_INTNO(irq)) {
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printk ("%s: Unknown irq %d requested from %s\n",
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__FUNCTION__, irq, devname);
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return -ENXIO;
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}
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vector = IRQ_SOURCE_TO_VECTOR(irq);
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/*
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* Check type/source combination: slow ints are (currently)
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* only possible for MFP-interrupts.
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*/
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if (flags == IRQ_TYPE_SLOW &&
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(irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE)) {
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printk ("%s: Slow irq requested for non-MFP source %d from %s\n",
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__FUNCTION__, irq, devname);
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return -EINVAL;
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}
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if (vectors[vector] == bad_inthandler) {
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/* int has no handler yet */
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irq_handler[irq].handler = handler;
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irq_handler[irq].dev_id = dev_id;
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irq_param[irq].flags = flags;
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irq_param[irq].devname = devname;
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vectors[vector] =
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(flags == IRQ_TYPE_SLOW) ? slow_handlers[irq-STMFP_SOURCE_BASE] :
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(flags == IRQ_TYPE_FAST) ? atari_fast_irq_handler :
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atari_prio_irq_handler;
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/* If MFP int, also enable and umask it */
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atari_turnon_irq(irq);
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atari_enable_irq(irq);
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return 0;
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}
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else if (irq_param[irq].flags == flags) {
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/* old handler is of same type -> handlers can be chained */
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irq_node_t *node;
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unsigned long flags;
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local_irq_save(flags);
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if (irq_handler[irq].handler != atari_call_irq_list) {
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/* Only one handler yet, make a node for this first one */
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if (!(node = new_irq_node()))
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return -ENOMEM;
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node->handler = irq_handler[irq].handler;
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node->dev_id = irq_handler[irq].dev_id;
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node->devname = irq_param[irq].devname;
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node->next = NULL;
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irq_handler[irq].handler = atari_call_irq_list;
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irq_handler[irq].dev_id = node;
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irq_param[irq].devname = "chained";
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}
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if (!(node = new_irq_node()))
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return -ENOMEM;
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node->handler = handler;
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node->dev_id = dev_id;
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node->devname = devname;
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/* new handlers are put in front of the queue */
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node->next = irq_handler[irq].dev_id;
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irq_handler[irq].dev_id = node;
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local_irq_restore(flags);
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return 0;
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} else {
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printk ("%s: Irq %d allocated by other type int (call from %s)\n",
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__FUNCTION__, irq, devname);
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return -EBUSY;
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}
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}
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void atari_free_irq(unsigned int irq, void *dev_id)
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{
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unsigned long flags;
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int vector;
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irq_node_t **list, *node;
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if (!IS_VALID_INTNO(irq)) {
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printk("%s: Unknown irq %d\n", __FUNCTION__, irq);
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return;
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}
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vector = IRQ_SOURCE_TO_VECTOR(irq);
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if (vectors[vector] == bad_inthandler)
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goto not_found;
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local_irq_save(flags);
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if (irq_handler[irq].handler != atari_call_irq_list) {
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/* It's the only handler for the interrupt */
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if (irq_handler[irq].dev_id != dev_id) {
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local_irq_restore(flags);
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goto not_found;
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}
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irq_handler[irq].handler = NULL;
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irq_handler[irq].dev_id = NULL;
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irq_param[irq].devname = NULL;
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vectors[vector] = bad_inthandler;
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/* If MFP int, also disable it */
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atari_disable_irq(irq);
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atari_turnoff_irq(irq);
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local_irq_restore(flags);
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return;
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}
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/* The interrupt is chained, find the irq on the list */
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for(list = (irq_node_t **)&irq_handler[irq].dev_id; *list; list = &(*list)->next) {
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if ((*list)->dev_id == dev_id) break;
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}
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if (!*list) {
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local_irq_restore(flags);
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goto not_found;
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}
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(*list)->handler = NULL; /* Mark it as free for reallocation */
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*list = (*list)->next;
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/* If there's now only one handler, unchain the interrupt, i.e. plug in
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* the handler directly again and omit atari_call_irq_list */
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node = (irq_node_t *)irq_handler[irq].dev_id;
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if (node && !node->next) {
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irq_handler[irq].handler = node->handler;
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irq_handler[irq].dev_id = node->dev_id;
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irq_param[irq].devname = node->devname;
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node->handler = NULL; /* Mark it as free for reallocation */
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}
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local_irq_restore(flags);
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return;
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not_found:
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printk("%s: tried to remove invalid irq\n", __FUNCTION__);
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return;
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}
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/*
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* atari_register_vme_int() returns the number of a free interrupt vector for
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* hardware with a programmable int vector (probably a VME board).
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@ -591,58 +431,24 @@ unsigned long atari_register_vme_int(void)
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{
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int i;
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for(i = 0; i < 32; i++)
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if((free_vme_vec_bitmap & (1 << i)) == 0)
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for (i = 0; i < 32; i++)
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if ((free_vme_vec_bitmap & (1 << i)) == 0)
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break;
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if(i == 16)
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if (i == 16)
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return 0;
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free_vme_vec_bitmap |= 1 << i;
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return (VME_SOURCE_BASE + i);
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return VME_SOURCE_BASE + i;
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}
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void atari_unregister_vme_int(unsigned long irq)
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{
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if(irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
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if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
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irq -= VME_SOURCE_BASE;
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free_vme_vec_bitmap &= ~(1 << irq);
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}
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}
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int show_atari_interrupts(struct seq_file *p, void *v)
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{
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int i;
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for (i = 0; i < NUM_INT_SOURCES; ++i) {
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if (vectors[IRQ_SOURCE_TO_VECTOR(i)] == bad_inthandler)
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continue;
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if (i < STMFP_SOURCE_BASE)
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seq_printf(p, "auto %2d: %10u ",
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i, kstat_cpu(0).irqs[i]);
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else
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seq_printf(p, "vec $%02x: %10u ",
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IRQ_SOURCE_TO_VECTOR(i),
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kstat_cpu(0).irqs[i]);
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if (irq_handler[i].handler != atari_call_irq_list) {
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seq_printf(p, "%s\n", irq_param[i].devname);
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}
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else {
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irq_node_t *n;
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for( n = (irq_node_t *)irq_handler[i].dev_id; n; n = n->next ) {
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seq_printf(p, "%s\n", n->devname);
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if (n->next)
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seq_puts(p, " " );
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}
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}
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}
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if (num_spurious)
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seq_printf(p, "spurio.: %10u\n", num_spurious);
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return 0;
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}
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@ -57,12 +57,6 @@ static int atari_get_hardware_list(char *buffer);
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/* atari specific irq functions */
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extern void atari_init_IRQ (void);
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extern int atari_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
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unsigned long flags, const char *devname, void *dev_id);
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extern void atari_free_irq (unsigned int irq, void *dev_id);
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extern void atari_enable_irq (unsigned int);
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extern void atari_disable_irq (unsigned int);
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extern int show_atari_interrupts (struct seq_file *, void *);
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extern void atari_mksound( unsigned int count, unsigned int ticks );
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#ifdef CONFIG_HEARTBEAT
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static void atari_heartbeat( int on );
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@ -232,13 +226,8 @@ void __init config_atari(void)
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mach_sched_init = atari_sched_init;
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mach_init_IRQ = atari_init_IRQ;
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mach_request_irq = atari_request_irq;
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mach_free_irq = atari_free_irq;
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enable_irq = atari_enable_irq;
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disable_irq = atari_disable_irq;
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mach_get_model = atari_get_model;
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mach_get_hardware_list = atari_get_hardware_list;
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mach_get_irq_list = show_atari_interrupts;
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mach_gettimeoffset = atari_gettimeoffset;
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mach_reset = atari_reset;
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mach_max_dma_address = 0xffffff;
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