2 * Interrupt handling for IPR-based IRQ.
4 * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
5 * Copyright (C) 2000 Kazumoto Kojima
6 * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
7 * Copyright (C) 2006 Paul Mundt
10 * On-chip supporting modules (TMU, RTC, etc.).
11 * On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300.
12 * Hitachi SolutionEngine external I/O:
13 * MS7709SE01, MS7709ASE01, and MS7750SE01
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
19 #include <linux/init.h>
20 #include <linux/irq.h>
21 #include <linux/module.h>
23 #include <linux/interrupt.h>
25 static void disable_ipr_irq(unsigned int irq
)
27 struct ipr_data
*p
= get_irq_chip_data(irq
);
28 /* Set the priority in IPR to 0 */
29 ctrl_outw(ctrl_inw(p
->addr
) & (0xffff ^ (0xf << p
->shift
)), p
->addr
);
32 static void enable_ipr_irq(unsigned int irq
)
34 struct ipr_data
*p
= get_irq_chip_data(irq
);
35 /* Set priority in IPR back to original value */
36 ctrl_outw(ctrl_inw(p
->addr
) | (p
->priority
<< p
->shift
), p
->addr
);
39 static struct irq_chip ipr_irq_chip
= {
41 .mask
= disable_ipr_irq
,
42 .unmask
= enable_ipr_irq
,
43 .mask_ack
= disable_ipr_irq
,
46 void make_ipr_irq(struct ipr_data
*table
, unsigned int nr_irqs
)
50 for (i
= 0; i
< nr_irqs
; i
++) {
51 unsigned int irq
= table
[i
].irq
;
52 table
[i
].addr
= map_ipridx_to_addr(table
[i
].ipr_idx
);
53 /* could the IPR index be mapped, if not we ignore this */
54 if (table
[i
].addr
== 0)
56 disable_irq_nosync(irq
);
57 set_irq_chip_and_handler_name(irq
, &ipr_irq_chip
,
58 handle_level_irq
, "level");
59 set_irq_chip_data(irq
, &table
[i
]);
63 EXPORT_SYMBOL(make_ipr_irq
);
65 #if !defined(CONFIG_CPU_HAS_PINT_IRQ)
66 int ipr_irq_demux(int irq
)
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