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>
17 #include <asm/hd64461.h>
19 static void disable_hd64461_irq(unsigned int irq)
23 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
25 local_irq_save(flags);
26 nimr = inw(HD64461_NIMR);
28 outw(nimr, HD64461_NIMR);
29 local_irq_restore(flags);
32 static void enable_hd64461_irq(unsigned int irq)
36 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
38 local_irq_save(flags);
39 nimr = inw(HD64461_NIMR);
41 outw(nimr, HD64461_NIMR);
42 local_irq_restore(flags);
45 static void mask_and_ack_hd64461(unsigned int irq)
47 disable_hd64461_irq(irq);
48 #ifdef CONFIG_HD64461_ENABLER
49 if (irq == HD64461_IRQBASE + 13)
50 outb(0x00, HD64461_PCC1CSCR);
54 static void end_hd64461_irq(unsigned int irq)
56 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
57 enable_hd64461_irq(irq);
60 static unsigned int startup_hd64461_irq(unsigned int irq)
62 enable_hd64461_irq(irq);
66 static void shutdown_hd64461_irq(unsigned int irq)
68 disable_hd64461_irq(irq);
71 static struct hw_interrupt_type hd64461_irq_type = {
72 .typename = "HD64461-IRQ",
73 .startup = startup_hd64461_irq,
74 .shutdown = shutdown_hd64461_irq,
75 .enable = enable_hd64461_irq,
76 .disable = disable_hd64461_irq,
77 .ack = mask_and_ack_hd64461,
78 .end = end_hd64461_irq,
81 static irqreturn_t hd64461_interrupt(int irq, void *dev_id, struct pt_regs *regs)
84 "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n",
85 inw(HD64461_NIRR), inw(HD64461_NIMR));
91 int (*func) (int, void *);
93 } hd64461_demux[HD64461_IRQ_NUM];
95 void hd64461_register_irq_demux(int irq,
96 int (*demux) (int irq, void *dev), void *dev)
98 hd64461_demux[irq - HD64461_IRQBASE].func = demux;
99 hd64461_demux[irq - HD64461_IRQBASE].dev = dev;
102 EXPORT_SYMBOL(hd64461_register_irq_demux);
104 void hd64461_unregister_irq_demux(int irq)
106 hd64461_demux[irq - HD64461_IRQBASE].func = 0;
109 EXPORT_SYMBOL(hd64461_unregister_irq_demux);
111 int hd64461_irq_demux(int irq)
113 if (irq == CONFIG_HD64461_IRQ) {
115 unsigned short nirr = inw(HD64461_NIRR);
116 unsigned short nimr = inw(HD64461_NIMR);
120 for (bit = 1, i = 0; i < 16; bit <<= 1, i++)
124 irq = CONFIG_HD64461_IRQ;
126 irq = HD64461_IRQBASE + i;
127 if (hd64461_demux[i].func != 0) {
128 irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev);
132 return __irq_demux(irq);
135 static struct irqaction irq0 = { hd64461_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "HD64461", NULL, NULL };
137 int __init setup_hd64461(void)
145 "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
146 CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
147 HD64461_IRQBASE + 15);
149 #if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */
150 outw(0x2240, INTC_ICR1);
152 outw(0xffff, HD64461_NIMR);
154 for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
155 irq_desc[i].chip = &hd64461_irq_type;
158 setup_irq(CONFIG_HD64461_IRQ, &irq0);
160 #ifdef CONFIG_HD64461_ENABLER
161 printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
162 outb(0x4c, HD64461_PCC1CSCIER);
163 outb(0x00, HD64461_PCC1CSCR);
169 module_init(setup_hd64461);