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)