sh: hd64461: Trivial build fixes for SH7709.
[linux-2.6.git] / arch / sh / cchips / hd6446x / hd64461.c
1 /*
2  *      Copyright (C) 2000 YAEGASHI Takeshi
3  *      Hitachi HD64461 companion chip support
4  */
5
6 #include <linux/sched.h>
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/param.h>
10 #include <linux/interrupt.h>
11 #include <linux/init.h>
12 #include <linux/irq.h>
13 #include <asm/io.h>
14 #include <asm/irq.h>
15 #include <asm/hd64461.h>
16
17 /* This belongs in cpu specific */
18 #define INTC_ICR1 0xA4140010UL
19
20 static void disable_hd64461_irq(unsigned int irq)
21 {
22         unsigned short nimr;
23         unsigned short mask = 1 << (irq - HD64461_IRQBASE);
24
25         nimr = inw(HD64461_NIMR);
26         nimr |= mask;
27         outw(nimr, HD64461_NIMR);
28 }
29
30 static void enable_hd64461_irq(unsigned int irq)
31 {
32         unsigned short nimr;
33         unsigned short mask = 1 << (irq - HD64461_IRQBASE);
34
35         nimr = inw(HD64461_NIMR);
36         nimr &= ~mask;
37         outw(nimr, HD64461_NIMR);
38 }
39
40 static void mask_and_ack_hd64461(unsigned int irq)
41 {
42         disable_hd64461_irq(irq);
43 #ifdef CONFIG_HD64461_ENABLER
44         if (irq == HD64461_IRQBASE + 13)
45                 outb(0x00, HD64461_PCC1CSCR);
46 #endif
47 }
48
49 static void end_hd64461_irq(unsigned int irq)
50 {
51         if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
52                 enable_hd64461_irq(irq);
53 }
54
55 static unsigned int startup_hd64461_irq(unsigned int irq)
56 {
57         enable_hd64461_irq(irq);
58         return 0;
59 }
60
61 static void shutdown_hd64461_irq(unsigned int irq)
62 {
63         disable_hd64461_irq(irq);
64 }
65
66 static struct hw_interrupt_type hd64461_irq_type = {
67         .typename       = "HD64461-IRQ",
68         .startup        = startup_hd64461_irq,
69         .shutdown       = shutdown_hd64461_irq,
70         .enable         = enable_hd64461_irq,
71         .disable        = disable_hd64461_irq,
72         .ack            = mask_and_ack_hd64461,
73         .end            = end_hd64461_irq,
74 };
75
76 static irqreturn_t hd64461_interrupt(int irq, void *dev_id)
77 {
78         printk(KERN_INFO
79                "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n",
80                inw(HD64461_NIRR), inw(HD64461_NIMR));
81
82         return IRQ_NONE;
83 }
84
85 static struct {
86         int (*func) (int, void *);
87         void *dev;
88 } hd64461_demux[HD64461_IRQ_NUM];
89
90 void hd64461_register_irq_demux(int irq,
91                                 int (*demux) (int irq, void *dev), void *dev)
92 {
93         hd64461_demux[irq - HD64461_IRQBASE].func = demux;
94         hd64461_demux[irq - HD64461_IRQBASE].dev = dev;
95 }
96
97 EXPORT_SYMBOL(hd64461_register_irq_demux);
98
99 void hd64461_unregister_irq_demux(int irq)
100 {
101         hd64461_demux[irq - HD64461_IRQBASE].func = 0;
102 }
103
104 EXPORT_SYMBOL(hd64461_unregister_irq_demux);
105
106 int hd64461_irq_demux(int irq)
107 {
108         if (irq == CONFIG_HD64461_IRQ) {
109                 unsigned short bit;
110                 unsigned short nirr = inw(HD64461_NIRR);
111                 unsigned short nimr = inw(HD64461_NIMR);
112                 int i;
113
114                 nirr &= ~nimr;
115                 for (bit = 1, i = 0; i < 16; bit <<= 1, i++)
116                         if (nirr & bit)
117                                 break;
118                 if (i == 16)
119                         irq = CONFIG_HD64461_IRQ;
120                 else {
121                         irq = HD64461_IRQBASE + i;
122                         if (hd64461_demux[i].func != 0) {
123                                 irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev);
124                         }
125                 }
126         }
127         return irq;
128 }
129
130 static struct irqaction irq0 = { hd64461_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "HD64461", NULL, NULL };
131
132 int __init setup_hd64461(void)
133 {
134         int i;
135
136         if (!MACH_HD64461)
137                 return 0;
138
139         printk(KERN_INFO
140                "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
141                CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
142                HD64461_IRQBASE + 15);
143
144 #if defined(CONFIG_CPU_SUBTYPE_SH7709)  /* Should be at processor specific part.. */
145         outw(0x2240, INTC_ICR1);
146 #endif
147         outw(0xffff, HD64461_NIMR);
148
149         /*  IRQ 80 -> 95 belongs to HD64461  */
150         for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
151                 irq_desc[i].chip = &hd64461_irq_type;
152         }
153
154         setup_irq(CONFIG_HD64461_IRQ, &irq0);
155
156 #ifdef CONFIG_HD64461_ENABLER
157         printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
158         outb(0x4c, HD64461_PCC1CSCIER);
159         outb(0x00, HD64461_PCC1CSCR);
160 #endif
161
162         return 0;
163 }
164
165 module_init(setup_hd64461);