2 * linux/arch/sh/boards/se/7722/irq.c
4 * Copyright (C) 2007 Nobuhiro Iwamatsu
6 * Hitachi UL SolutionEngine 7722 Support.
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/init.h>
13 #include <linux/irq.h>
14 #include <linux/interrupt.h>
17 #include <mach-se/mach/se7722.h>
19 unsigned int se7722_fpga_irq
[SE7722_FPGA_IRQ_NR
] = { 0, };
21 static void disable_se7722_irq(struct irq_data
*data
)
23 unsigned int bit
= (unsigned int)irq_data_get_irq_chip_data(data
);
24 __raw_writew(__raw_readw(IRQ01_MASK
) | 1 << bit
, IRQ01_MASK
);
27 static void enable_se7722_irq(struct irq_data
*data
)
29 unsigned int bit
= (unsigned int)irq_data_get_irq_chip_data(data
);
30 __raw_writew(__raw_readw(IRQ01_MASK
) & ~(1 << bit
), IRQ01_MASK
);
33 static struct irq_chip se7722_irq_chip __read_mostly
= {
34 .name
= "SE7722-FPGA",
35 .irq_mask
= disable_se7722_irq
,
36 .irq_unmask
= enable_se7722_irq
,
39 static void se7722_irq_demux(unsigned int irq
, struct irq_desc
*desc
)
41 unsigned short intv
= __raw_readw(IRQ01_STS
);
42 unsigned int ext_irq
= 0;
44 intv
&= (1 << SE7722_FPGA_IRQ_NR
) - 1;
46 for (; intv
; intv
>>= 1, ext_irq
++) {
50 generic_handle_irq(se7722_fpga_irq
[ext_irq
]);
55 * Initialize IRQ setting
57 void __init
init_se7722_IRQ(void)
61 __raw_writew(0, IRQ01_MASK
); /* disable all irqs */
62 __raw_writew(0x2000, 0xb03fffec); /* mrshpc irq enable */
64 for (i
= 0; i
< SE7722_FPGA_IRQ_NR
; i
++) {
68 se7722_fpga_irq
[i
] = irq
;
70 irq_set_chip_and_handler_name(se7722_fpga_irq
[i
],
75 irq_set_chip_data(se7722_fpga_irq
[i
], (void *)i
);
78 irq_set_chained_handler(IRQ0_IRQ
, se7722_irq_demux
);
79 irq_set_irq_type(IRQ0_IRQ
, IRQ_TYPE_LEVEL_LOW
);
81 irq_set_chained_handler(IRQ1_IRQ
, se7722_irq_demux
);
82 irq_set_irq_type(IRQ1_IRQ
, IRQ_TYPE_LEVEL_LOW
);