2 * linux/arch/sh/boards/se/7343/irq.c
4 * Copyright (C) 2008 Yoshihiro Shimoda
6 * Based on linux/arch/sh/boards/se/7722/irq.c
7 * Copyright (C) 2007 Nobuhiro Iwamatsu
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
17 #include <mach-se/mach/se7343.h>
19 unsigned int se7343_fpga_irq[SE7343_FPGA_IRQ_NR] = { 0, };
21 static void disable_se7343_irq(unsigned int irq)
23 unsigned int bit = (unsigned int)get_irq_chip_data(irq);
24 __raw_writew(__raw_readw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK);
27 static void enable_se7343_irq(unsigned int irq)
29 unsigned int bit = (unsigned int)get_irq_chip_data(irq);
30 __raw_writew(__raw_readw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK);
33 static struct irq_chip se7343_irq_chip __read_mostly = {
34 .name = "SE7343-FPGA",
35 .mask = disable_se7343_irq,
36 .unmask = enable_se7343_irq,
37 .mask_ack = disable_se7343_irq,
40 static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
42 unsigned short intv = __raw_readw(PA_CPLD_ST);
43 unsigned int ext_irq = 0;
45 intv &= (1 << SE7343_FPGA_IRQ_NR) - 1;
47 for (; intv; intv >>= 1, ext_irq++) {
51 generic_handle_irq(se7343_fpga_irq[ext_irq]);
56 * Initialize IRQ setting
58 void __init init_7343se_IRQ(void)
62 __raw_writew(0, PA_CPLD_IMSK); /* disable all irqs */
63 __raw_writew(0x2000, 0xb03fffec); /* mrshpc irq enable */
65 for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) {
69 se7343_fpga_irq[i] = irq;
71 set_irq_chip_and_handler_name(se7343_fpga_irq[i],
73 handle_level_irq, "level");
75 set_irq_chip_data(se7343_fpga_irq[i], (void *)i);
78 set_irq_chained_handler(IRQ0_IRQ, se7343_irq_demux);
79 set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
80 set_irq_chained_handler(IRQ1_IRQ, se7343_irq_demux);
81 set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
82 set_irq_chained_handler(IRQ4_IRQ, se7343_irq_demux);
83 set_irq_type(IRQ4_IRQ, IRQ_TYPE_LEVEL_LOW);
84 set_irq_chained_handler(IRQ5_IRQ, se7343_irq_demux);
85 set_irq_type(IRQ5_IRQ, IRQ_TYPE_LEVEL_LOW);