2 * arch/mips/emma2rh/common/irq_emma2rh.c
3 * This file defines the irq handler for EMMA2RH.
5 * Copyright (C) NEC Electronics Corporation 2005-2006
7 * This file is based on the arch/mips/ddb5xxx/ddb5477/irq_5477.c
9 * Copyright 2001 MontaVista Software Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 * EMMA2RH defines 64 IRQs.
29 * This file exports one function:
30 * emma2rh_irq_init(u32 irq_base);
33 #include <linux/interrupt.h>
34 #include <linux/types.h>
35 #include <linux/ptrace.h>
37 #include <asm/debug.h>
39 #include <asm/emma2rh/emma2rh.h>
41 /* number of total irqs supported by EMMA2RH */
42 #define NUM_EMMA2RH_IRQ 96
44 static int emma2rh_irq_base = -1;
46 void ll_emma2rh_irq_enable(int);
47 void ll_emma2rh_irq_disable(int);
49 static void emma2rh_irq_enable(unsigned int irq)
51 ll_emma2rh_irq_enable(irq - emma2rh_irq_base);
54 static void emma2rh_irq_disable(unsigned int irq)
56 ll_emma2rh_irq_disable(irq - emma2rh_irq_base);
59 static void emma2rh_irq_end(unsigned int irq)
61 if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
62 ll_emma2rh_irq_enable(irq - emma2rh_irq_base);
65 struct irq_chip emma2rh_irq_controller = {
66 .typename = "emma2rh_irq",
67 .ack = emma2rh_irq_disable,
68 .mask = emma2rh_irq_disable,
69 .mask_ack = emma2rh_irq_disable,
70 .unmask = emma2rh_irq_enable,
71 .end = emma2rh_irq_end,
74 void emma2rh_irq_init(u32 irq_base)
78 for (i = irq_base; i < irq_base + NUM_EMMA2RH_IRQ; i++)
79 set_irq_chip_and_handler(i, &emma2rh_irq_controller,
82 emma2rh_irq_base = irq_base;
85 void ll_emma2rh_irq_enable(int emma2rh_irq)
91 reg_index = EMMA2RH_BHIF_INT_EN_0
92 + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0)
94 reg_value = emma2rh_in32(reg_index);
95 reg_bitmask = 0x1 << (emma2rh_irq % 32);
96 db_assert((reg_value & reg_bitmask) == 0);
97 emma2rh_out32(reg_index, reg_value | reg_bitmask);
100 void ll_emma2rh_irq_disable(int emma2rh_irq)
106 reg_index = EMMA2RH_BHIF_INT_EN_0
107 + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0)
108 * (emma2rh_irq / 32);
109 reg_value = emma2rh_in32(reg_index);
110 reg_bitmask = 0x1 << (emma2rh_irq % 32);
111 db_assert((reg_value & reg_bitmask) != 0);
112 emma2rh_out32(reg_index, reg_value & ~reg_bitmask);