[PATCH] m68k: convert q40 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
9c5f4afdfb
commit
77dda339e5
3 changed files with 165 additions and 313 deletions
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@ -205,18 +205,9 @@ ENTRY(auto_inthandler)
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movel %sp,%sp@-
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movel %d0,%sp@- | put vector # on stack
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#if defined(MACH_Q40_ONLY) && defined(CONFIG_BLK_DEV_FD)
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btstb #4,0xff000000 | Q40 floppy needs very special treatment ...
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jbeq 1f
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btstb #3,0xff000004
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jbeq 1f
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jbsr floppy_hardint
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jbra 3f
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1:
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#endif
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auto_irqhandler_fixup = . + 2
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jsr m68k_handle_int | process the IRQ
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3: addql #8,%sp | pop parameters off stack
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addql #8,%sp | pop parameters off stack
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ret_from_interrupt:
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subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
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@ -38,13 +38,8 @@
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extern irqreturn_t q40_process_int (int level, struct pt_regs *regs);
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extern void q40_init_IRQ (void);
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extern void q40_free_irq (unsigned int, void *);
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extern int show_q40_interrupts (struct seq_file *, void *);
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extern void q40_enable_irq (unsigned int);
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extern void q40_disable_irq (unsigned int);
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static void q40_get_model(char *model);
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static int q40_get_hardware_list(char *buffer);
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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);
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extern void q40_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
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extern unsigned long q40_gettimeoffset (void);
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@ -174,12 +169,6 @@ void __init config_q40(void)
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mach_set_clock_mmss = q40_set_clock_mmss;
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mach_reset = q40_reset;
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mach_free_irq = q40_free_irq;
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mach_process_int = q40_process_int;
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mach_get_irq_list = show_q40_interrupts;
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mach_request_irq = q40_request_irq;
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enable_irq = q40_enable_irq;
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disable_irq = q40_disable_irq;
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mach_get_model = q40_get_model;
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mach_get_hardware_list = q40_get_hardware_list;
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@ -14,13 +14,8 @@
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/interrupt.h>
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#include <linux/hardirq.h>
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#include <asm/rtc.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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#include <asm/irq.h>
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@ -39,28 +34,37 @@
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*
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*/
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extern int ints_inited;
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static void q40_irq_handler(unsigned int, struct pt_regs *fp);
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static void q40_enable_irq(unsigned int);
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static void q40_disable_irq(unsigned int);
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unsigned short q40_ablecount[35];
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unsigned short q40_state[35];
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irqreturn_t q40_irq2_handler (int, void *, struct pt_regs *fp);
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static int q40_irq_startup(unsigned int irq)
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{
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/* test for ISA ints not implemented by HW */
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switch (irq) {
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case 1: case 2: case 8: case 9:
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case 11: case 12: case 13:
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printk("%s: ISA IRQ %d not implemented by HW\n", __FUNCTION__, irq);
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return -ENXIO;
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}
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return 0;
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}
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static void q40_irq_shutdown(unsigned int irq)
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{
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}
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static irqreturn_t q40_defhand (int irq, void *dev_id, struct pt_regs *fp);
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#define DEVNAME_SIZE 24
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static struct q40_irq_node {
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irqreturn_t (*handler)(int, void *, struct pt_regs *);
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unsigned long flags;
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void *dev_id;
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/* struct q40_irq_node *next;*/
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char devname[DEVNAME_SIZE];
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unsigned count;
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unsigned short state;
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} irq_tab[Q40_IRQ_MAX+1];
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short unsigned q40_ablecount[Q40_IRQ_MAX+1];
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static struct irq_controller q40_irq_controller = {
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.name = "q40",
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.lock = SPIN_LOCK_UNLOCKED,
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.startup = q40_irq_startup,
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.shutdown = q40_irq_shutdown,
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.enable = q40_enable_irq,
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.disable = q40_disable_irq,
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};
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/*
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* void q40_init_IRQ (void)
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@ -73,139 +77,29 @@ short unsigned q40_ablecount[Q40_IRQ_MAX+1];
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* the q40 IRQ handling routines.
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*/
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static int disabled=0;
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static int disabled;
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void q40_init_IRQ (void)
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void q40_init_IRQ(void)
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{
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int i;
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disabled=0;
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for (i = 0; i <= Q40_IRQ_MAX; i++) {
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irq_tab[i].handler = q40_defhand;
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irq_tab[i].flags = 0;
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irq_tab[i].dev_id = NULL;
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/* irq_tab[i].next = NULL;*/
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irq_tab[i].devname[0] = 0;
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irq_tab[i].count = 0;
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irq_tab[i].state =0;
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q40_ablecount[i]=0; /* all enabled */
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}
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m68k_setup_irq_controller(&q40_irq_controller, 1, Q40_IRQ_MAX);
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/* setup handler for ISA ints */
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cpu_request_irq(IRQ_AUTO_2, q40_irq2_handler, 0,
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"q40 ISA and master chip", NULL);
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m68k_setup_auto_interrupt(q40_irq_handler);
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m68k_irq_startup(IRQ_AUTO_2);
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m68k_irq_startup(IRQ_AUTO_4);
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/* now enable some ints.. */
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master_outb(1,EXT_ENABLE_REG); /* ISA IRQ 5-15 */
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master_outb(1, EXT_ENABLE_REG); /* ISA IRQ 5-15 */
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/* make sure keyboard IRQ is disabled */
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master_outb(0,KEY_IRQ_ENABLE_REG);
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master_outb(0, KEY_IRQ_ENABLE_REG);
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}
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int q40_request_irq(unsigned int irq,
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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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/*printk("q40_request_irq %d, %s\n",irq,devname);*/
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if (irq > Q40_IRQ_MAX || (irq>15 && irq<32)) {
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printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
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return -ENXIO;
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}
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/* test for ISA ints not implemented by HW */
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switch (irq)
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{
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case 1: case 2: case 8: case 9:
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case 12: case 13:
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printk("%s: ISA IRQ %d from %s not implemented by HW\n", __FUNCTION__, irq, devname);
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return -ENXIO;
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case 11:
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printk("warning IRQ 10 and 11 not distinguishable\n");
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irq=10;
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default:
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;
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}
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if (irq<Q40_IRQ_SAMPLE)
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{
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if (irq_tab[irq].dev_id != NULL)
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{
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printk("%s: IRQ %d from %s is not replaceable\n",
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__FUNCTION__, irq, irq_tab[irq].devname);
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return -EBUSY;
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}
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/*printk("IRQ %d set to handler %p\n",irq,handler);*/
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if (dev_id==NULL)
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{
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printk("WARNING: dev_id == NULL in request_irq\n");
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dev_id=(void*)1;
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}
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irq_tab[irq].handler = handler;
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irq_tab[irq].flags = flags;
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irq_tab[irq].dev_id = dev_id;
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strlcpy(irq_tab[irq].devname,devname,sizeof(irq_tab[irq].devname));
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irq_tab[irq].state = 0;
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return 0;
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}
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else {
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/* Q40_IRQ_SAMPLE :somewhat special actions required here ..*/
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cpu_request_irq(4, handler, flags, devname, dev_id);
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cpu_request_irq(6, handler, flags, devname, dev_id);
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return 0;
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}
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}
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void q40_free_irq(unsigned int irq, void *dev_id)
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{
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if (irq > Q40_IRQ_MAX || (irq>15 && irq<32)) {
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printk("%s: Incorrect IRQ %d, dev_id %x \n", __FUNCTION__, irq, (unsigned)dev_id);
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return;
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}
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/* test for ISA ints not implemented by HW */
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switch (irq)
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{
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case 1: case 2: case 8: case 9:
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case 12: case 13:
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printk("%s: ISA IRQ %d from %x invalid\n", __FUNCTION__, irq, (unsigned)dev_id);
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return;
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case 11: irq=10;
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default:
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;
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}
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if (irq<Q40_IRQ_SAMPLE)
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{
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if (irq_tab[irq].dev_id != dev_id)
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printk("%s: Removing probably wrong IRQ %d from %s\n",
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__FUNCTION__, irq, irq_tab[irq].devname);
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irq_tab[irq].handler = q40_defhand;
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irq_tab[irq].flags = 0;
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irq_tab[irq].dev_id = NULL;
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/* irq_tab[irq].devname = NULL; */
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/* do not reset state !! */
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}
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else
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{ /* == Q40_IRQ_SAMPLE */
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cpu_free_irq(4, dev_id);
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cpu_free_irq(6, dev_id);
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}
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}
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irqreturn_t q40_process_int (int level, struct pt_regs *fp)
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{
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printk("unexpected interrupt vec=%x, pc=%lx, d0=%lx, d0_orig=%lx, d1=%lx, d2=%lx\n",
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level, fp->pc, fp->d0, fp->orig_d0, fp->d1, fp->d2);
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printk("\tIIRQ_REG = %x, EIRQ_REG = %x\n",master_inb(IIRQ_REG),master_inb(EIRQ_REG));
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return IRQ_HANDLED;
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}
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/*
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* this stuff doesn't really belong here..
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*/
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*/
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int ql_ticks; /* 200Hz ticks since last jiffie */
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static int sound_ticks;
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@ -214,54 +108,53 @@ static int sound_ticks;
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void q40_mksound(unsigned int hz, unsigned int ticks)
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{
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/* for now ignore hz, except that hz==0 switches off sound */
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/* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */
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if (hz==0)
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{
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if (sound_ticks)
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sound_ticks=1;
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/* for now ignore hz, except that hz==0 switches off sound */
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/* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */
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if (hz == 0) {
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if (sound_ticks)
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sound_ticks = 1;
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*DAC_LEFT=128;
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*DAC_RIGHT=128;
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*DAC_LEFT = 128;
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*DAC_RIGHT = 128;
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return;
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}
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/* sound itself is done in q40_timer_int */
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if (sound_ticks == 0) sound_ticks=1000; /* pretty long beep */
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sound_ticks=ticks<<1;
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return;
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}
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/* sound itself is done in q40_timer_int */
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if (sound_ticks == 0)
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sound_ticks = 1000; /* pretty long beep */
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sound_ticks = ticks << 1;
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}
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static irqreturn_t (*q40_timer_routine)(int, void *, struct pt_regs *);
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static irqreturn_t q40_timer_int (int irq, void * dev, struct pt_regs * regs)
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{
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ql_ticks = ql_ticks ? 0 : 1;
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if (sound_ticks)
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{
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unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL;
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sound_ticks--;
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*DAC_LEFT=sval;
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*DAC_RIGHT=sval;
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}
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ql_ticks = ql_ticks ? 0 : 1;
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if (sound_ticks) {
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unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL;
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sound_ticks--;
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*DAC_LEFT=sval;
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*DAC_RIGHT=sval;
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}
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if (!ql_ticks)
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q40_timer_routine(irq, dev, regs);
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return IRQ_HANDLED;
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if (!ql_ticks)
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q40_timer_routine(irq, dev, regs);
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return IRQ_HANDLED;
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}
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void q40_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
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{
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int timer_irq;
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int timer_irq;
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q40_timer_routine = timer_routine;
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timer_irq=Q40_IRQ_FRAME;
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q40_timer_routine = timer_routine;
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timer_irq = Q40_IRQ_FRAME;
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if (request_irq(timer_irq, q40_timer_int, 0,
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if (request_irq(timer_irq, q40_timer_int, 0,
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"timer", q40_timer_int))
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panic ("Couldn't register timer int");
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panic("Couldn't register timer int");
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master_outb(-1,FRAME_CLEAR_REG);
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master_outb( 1,FRAME_RATE_REG);
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master_outb(-1, FRAME_CLEAR_REG);
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master_outb( 1, FRAME_RATE_REG);
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}
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@ -307,153 +200,132 @@ static int mext_disabled=0; /* ext irq disabled by master chip? */
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static int aliased_irq=0; /* how many times inside handler ?*/
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/* got level 2 interrupt, dispatch to ISA or keyboard/timer IRQs */
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irqreturn_t q40_irq2_handler (int vec, void *devname, struct pt_regs *fp)
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/* got interrupt, dispatch to ISA or keyboard/timer IRQs */
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static void q40_irq_handler(unsigned int irq, struct pt_regs *fp)
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{
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unsigned mir, mer;
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int irq,i;
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unsigned mir, mer;
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int i;
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//repeat:
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mir=master_inb(IIRQ_REG);
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if (mir&Q40_IRQ_FRAME_MASK) {
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irq_tab[Q40_IRQ_FRAME].count++;
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irq_tab[Q40_IRQ_FRAME].handler(Q40_IRQ_FRAME,irq_tab[Q40_IRQ_FRAME].dev_id,fp);
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master_outb(-1,FRAME_CLEAR_REG);
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}
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if ((mir&Q40_IRQ_SER_MASK) || (mir&Q40_IRQ_EXT_MASK)) {
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mer=master_inb(EIRQ_REG);
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for (i=0; eirqs[i].mask; i++) {
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if (mer&(eirqs[i].mask)) {
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irq=eirqs[i].irq;
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mir = master_inb(IIRQ_REG);
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#ifdef CONFIG_BLK_DEV_FD
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if ((mir & Q40_IRQ_EXT_MASK) &&
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(master_inb(EIRQ_REG) & Q40_IRQ6_MASK)) {
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floppy_hardint();
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return;
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}
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#endif
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switch (irq) {
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case 4:
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case 6:
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m68k_handle_int(Q40_IRQ_SAMPLE, fp);
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return;
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}
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if (mir & Q40_IRQ_FRAME_MASK) {
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m68k_handle_int(Q40_IRQ_FRAME, fp);
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master_outb(-1, FRAME_CLEAR_REG);
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}
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if ((mir & Q40_IRQ_SER_MASK) || (mir & Q40_IRQ_EXT_MASK)) {
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mer = master_inb(EIRQ_REG);
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for (i = 0; eirqs[i].mask; i++) {
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if (mer & eirqs[i].mask) {
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irq = eirqs[i].irq;
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/*
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* There is a little mess wrt which IRQ really caused this irq request. The
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* main problem is that IIRQ_REG and EIRQ_REG reflect the state when they
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* are read - which is long after the request came in. In theory IRQs should
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* not just go away but they occassionally do
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*/
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if (irq>4 && irq<=15 && mext_disabled) {
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/*aliased_irq++;*/
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goto iirq;
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}
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if (irq_tab[irq].handler == q40_defhand ) {
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printk("handler for IRQ %d not defined\n",irq);
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continue; /* ignore uninited INTs :-( */
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}
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if ( irq_tab[irq].state & IRQ_INPROGRESS ) {
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/* some handlers do local_irq_enable() for irq latency reasons, */
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/* however reentering an active irq handler is not permitted */
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if (irq > 4 && irq <= 15 && mext_disabled) {
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/*aliased_irq++;*/
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goto iirq;
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}
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if (q40_state[irq] & IRQ_INPROGRESS) {
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/* some handlers do local_irq_enable() for irq latency reasons, */
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/* however reentering an active irq handler is not permitted */
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#ifdef IP_USE_DISABLE
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/* in theory this is the better way to do it because it still */
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/* lets through eg the serial irqs, unfortunately it crashes */
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disable_irq(irq);
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disabled=1;
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/* in theory this is the better way to do it because it still */
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/* lets through eg the serial irqs, unfortunately it crashes */
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disable_irq(irq);
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disabled = 1;
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#else
|
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/*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;
|
||||
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 */
|
||||
/* naively enable everything, if that fails than */
|
||||
/* this function will be reentered immediately thus */
|
||||
/* getting another chance to disable the IRQ */
|
||||
|
||||
if ( disabled ) {
|
||||
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);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
static irqreturn_t q40_defhand (int irq, void *dev_id, struct pt_regs *fp)
|
||||
void q40_enable_irq(unsigned int irq)
|
||||
{
|
||||
if (irq!=Q40_IRQ_KEYBOARD)
|
||||
printk ("Unknown q40 interrupt %d\n", irq);
|
||||
else master_outb(-1,KEYBOARD_UNLOCK_REG);
|
||||
return IRQ_NONE;
|
||||
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_enable_irq (unsigned int irq)
|
||||
void q40_disable_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);
|
||||
}
|
||||
/* 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);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void q40_disable_irq (unsigned int irq)
|
||||
unsigned long q40_probe_irq_on(void)
|
||||
{
|
||||
/* 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);
|
||||
}
|
||||
printk("irq probing not working - reconfigure the driver to avoid this\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
unsigned long q40_probe_irq_on (void)
|
||||
int q40_probe_irq_off(unsigned long irqs)
|
||||
{
|
||||
printk("irq probing not working - reconfigure the driver to avoid this\n");
|
||||
return -1;
|
||||
return -1;
|
||||
}
|
||||
int q40_probe_irq_off (unsigned long irqs)
|
||||
{
|
||||
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:
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in a new issue