2 * Copyright (C) 2000 YAEGASHI Takeshi
3 * Hitachi HD64461 companion chip support
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>
15 #include <asm/hd64461.h>
17 /* This belongs in cpu specific */
18 #define INTC_ICR1 0xA4140010UL
20 static void hd64461_mask_irq(unsigned int irq
)
23 unsigned short mask
= 1 << (irq
- HD64461_IRQBASE
);
25 nimr
= __raw_readw(HD64461_NIMR
);
27 __raw_writew(nimr
, HD64461_NIMR
);
30 static void hd64461_unmask_irq(unsigned int irq
)
33 unsigned short mask
= 1 << (irq
- HD64461_IRQBASE
);
35 nimr
= __raw_readw(HD64461_NIMR
);
37 __raw_writew(nimr
, HD64461_NIMR
);
40 static void hd64461_mask_and_ack_irq(unsigned int irq
)
42 hd64461_mask_irq(irq
);
43 #ifdef CONFIG_HD64461_ENABLER
44 if (irq
== HD64461_IRQBASE
+ 13)
45 __raw_writeb(0x00, HD64461_PCC1CSCR
);
49 static struct irq_chip hd64461_irq_chip
= {
50 .name
= "HD64461-IRQ",
51 .mask
= hd64461_mask_irq
,
52 .mask_ack
= hd64461_mask_and_ack_irq
,
53 .unmask
= hd64461_unmask_irq
,
56 int hd64461_irq_demux(int irq
)
58 if (irq
== CONFIG_HD64461_IRQ
) {
60 unsigned short nirr
= inw(HD64461_NIRR
);
61 unsigned short nimr
= inw(HD64461_NIMR
);
65 for (bit
= 1, i
= 0; i
< 16; bit
<<= 1, i
++)
68 irq
= HD64461_IRQBASE
+ i
;
73 int __init
setup_hd64461(void)
81 "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
82 CONFIG_HD64461_IOBASE
, CONFIG_HD64461_IRQ
, HD64461_IRQBASE
,
83 HD64461_IRQBASE
+ 15);
85 /* Should be at processor specific part.. */
86 #if defined(CONFIG_CPU_SUBTYPE_SH7709)
87 __raw_writew(0x2240, INTC_ICR1
);
89 __raw_writew(0xffff, HD64461_NIMR
);
91 /* IRQ 80 -> 95 belongs to HD64461 */
92 for (i
= HD64461_IRQBASE
; i
< HD64461_IRQBASE
+ 16; i
++)
93 set_irq_chip_and_handler(i
, &hd64461_irq_chip
,
96 #ifdef CONFIG_HD64461_ENABLER
97 printk(KERN_INFO
"HD64461: enabling PCMCIA devices\n");
98 __raw_writeb(0x4c, HD64461_PCC1CSCIER
);
99 __raw_writeb(0x00, HD64461_PCC1CSCR
);
105 module_init(setup_hd64461
);