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>
16 #include <asm/hd64461.h>
18 static void disable_hd64461_irq(unsigned int irq)
21 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
23 nimr = inw(HD64461_NIMR);
25 outw(nimr, HD64461_NIMR);
28 static void enable_hd64461_irq(unsigned int irq)
31 unsigned short mask = 1 << (irq - HD64461_IRQBASE);
33 nimr = inw(HD64461_NIMR);
35 outw(nimr, HD64461_NIMR);
38 static void mask_and_ack_hd64461(unsigned int irq)
40 disable_hd64461_irq(irq);
41 #ifdef CONFIG_HD64461_ENABLER
42 if (irq == HD64461_IRQBASE + 13)
43 outb(0x00, HD64461_PCC1CSCR);
47 static void end_hd64461_irq(unsigned int irq)
49 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
50 enable_hd64461_irq(irq);
53 static unsigned int startup_hd64461_irq(unsigned int irq)
55 enable_hd64461_irq(irq);
59 static void shutdown_hd64461_irq(unsigned int irq)
61 disable_hd64461_irq(irq);
64 static struct hw_interrupt_type hd64461_irq_type = {
65 .typename = "HD64461-IRQ",
66 .startup = startup_hd64461_irq,
67 .shutdown = shutdown_hd64461_irq,
68 .enable = enable_hd64461_irq,
69 .disable = disable_hd64461_irq,
70 .ack = mask_and_ack_hd64461,
71 .end = end_hd64461_irq,
74 static irqreturn_t hd64461_interrupt(int irq, void *dev_id)
77 "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n",
78 inw(HD64461_NIRR), inw(HD64461_NIMR));
84 int (*func) (int, void *);
86 } hd64461_demux[HD64461_IRQ_NUM];
88 void hd64461_register_irq_demux(int irq,
89 int (*demux) (int irq, void *dev), void *dev)
91 hd64461_demux[irq - HD64461_IRQBASE].func = demux;
92 hd64461_demux[irq - HD64461_IRQBASE].dev = dev;
95 EXPORT_SYMBOL(hd64461_register_irq_demux);
97 void hd64461_unregister_irq_demux(int irq)
99 hd64461_demux[irq - HD64461_IRQBASE].func = 0;
102 EXPORT_SYMBOL(hd64461_unregister_irq_demux);
104 int hd64461_irq_demux(int irq)
106 if (irq == CONFIG_HD64461_IRQ) {
108 unsigned short nirr = inw(HD64461_NIRR);
109 unsigned short nimr = inw(HD64461_NIMR);
113 for (bit = 1, i = 0; i < 16; bit <<= 1, i++)
117 irq = CONFIG_HD64461_IRQ;
119 irq = HD64461_IRQBASE + i;
120 if (hd64461_demux[i].func != 0) {
121 irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev);
125 return __irq_demux(irq);
128 static struct irqaction irq0 = { hd64461_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "HD64461", NULL, NULL };
130 int __init setup_hd64461(void)
138 "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
139 CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
140 HD64461_IRQBASE + 15);
142 #if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */
143 outw(0x2240, INTC_ICR1);
145 outw(0xffff, HD64461_NIMR);
147 for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
148 irq_desc[i].chip = &hd64461_irq_type;
151 setup_irq(CONFIG_HD64461_IRQ, &irq0);
153 #ifdef CONFIG_HD64461_ENABLER
154 printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
155 outb(0x4c, HD64461_PCC1CSCIER);
156 outb(0x00, HD64461_PCC1CSCR);
162 module_init(setup_hd64461);