2 * $Id: setup.c,v 1.5 2004/03/16 00:07:50 lethal Exp $
3 * Copyright (C) 2000 YAEGASHI Takeshi
4 * Hitachi HD64461 companion chip support
7 #include <linux/sched.h>
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/param.h>
11 #include <linux/interrupt.h>
12 #include <linux/init.h>
13 #include <linux/irq.h>
18 #include <asm/hd64461/hd64461.h>
20 static void disable_hd64461_irq(unsigned int irq)
24 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
26 local_irq_save(flags);
27 nimr = inw(HD64461_NIMR);
29 outw(nimr, HD64461_NIMR);
30 local_irq_restore(flags);
33 static void enable_hd64461_irq(unsigned int irq)
37 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
39 local_irq_save(flags);
40 nimr = inw(HD64461_NIMR);
42 outw(nimr, HD64461_NIMR);
43 local_irq_restore(flags);
46 static void mask_and_ack_hd64461(unsigned int irq)
48 disable_hd64461_irq(irq);
49 #ifdef CONFIG_HD64461_ENABLER
50 if (irq == HD64461_IRQBASE + 13)
51 outb(0x00, HD64461_PCC1CSCR);
55 static void end_hd64461_irq(unsigned int irq)
57 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
58 enable_hd64461_irq(irq);
61 static unsigned int startup_hd64461_irq(unsigned int irq)
63 enable_hd64461_irq(irq);
67 static void shutdown_hd64461_irq(unsigned int irq)
69 disable_hd64461_irq(irq);
72 static struct hw_interrupt_type hd64461_irq_type = {
73 .typename = "HD64461-IRQ",
74 .startup = startup_hd64461_irq,
75 .shutdown = shutdown_hd64461_irq,
76 .enable = enable_hd64461_irq,
77 .disable = disable_hd64461_irq,
78 .ack = mask_and_ack_hd64461,
79 .end = end_hd64461_irq,
82 static irqreturn_t hd64461_interrupt(int irq, void *dev_id, struct pt_regs *regs)
85 "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n",
86 inw(HD64461_NIRR), inw(HD64461_NIMR));
92 int (*func) (int, void *);
94 } hd64461_demux[HD64461_IRQ_NUM];
96 void hd64461_register_irq_demux(int irq,
97 int (*demux) (int irq, void *dev), void *dev)
99 hd64461_demux[irq - HD64461_IRQBASE].func = demux;
100 hd64461_demux[irq - HD64461_IRQBASE].dev = dev;
103 EXPORT_SYMBOL(hd64461_register_irq_demux);
105 void hd64461_unregister_irq_demux(int irq)
107 hd64461_demux[irq - HD64461_IRQBASE].func = 0;
110 EXPORT_SYMBOL(hd64461_unregister_irq_demux);
112 int hd64461_irq_demux(int irq)
114 if (irq == CONFIG_HD64461_IRQ) {
116 unsigned short nirr = inw(HD64461_NIRR);
117 unsigned short nimr = inw(HD64461_NIMR);
121 for (bit = 1, i = 0; i < 16; bit <<= 1, i++)
125 irq = CONFIG_HD64461_IRQ;
127 irq = HD64461_IRQBASE + i;
128 if (hd64461_demux[i].func != 0) {
129 irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev);
133 return __irq_demux(irq);
136 static struct irqaction irq0 = { hd64461_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "HD64461", NULL, NULL };
138 int __init setup_hd64461(void)
146 "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
147 CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
148 HD64461_IRQBASE + 15);
150 #if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */
151 outw(0x2240, INTC_ICR1);
153 outw(0xffff, HD64461_NIMR);
155 for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
156 irq_desc[i].chip = &hd64461_irq_type;
159 setup_irq(CONFIG_HD64461_IRQ, &irq0);
161 #ifdef CONFIG_HD64461_ENABLER
162 printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
163 outb(0x4c, HD64461_PCC1CSCIER);
164 outb(0x00, HD64461_PCC1CSCR);
170 module_init(setup_hd64461);