1 /* irq-mb93493.c: MB93493 companion chip interrupt handler
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/ptrace.h>
13 #include <linux/errno.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/ioport.h>
17 #include <linux/interrupt.h>
18 #include <linux/init.h>
19 #include <linux/irq.h>
22 #include <asm/system.h>
23 #include <asm/bitops.h>
24 #include <asm/delay.h>
26 #include <asm/irc-regs.h>
27 #include <asm/irq-routing.h>
28 #include <asm/mb93493-irqs.h>
30 static void frv_mb93493_doirq(struct irq_source *source);
32 /*****************************************************************************/
34 * MB93493 companion chip IRQ multiplexor
36 static struct irq_source frv_mb93493[2] = {
38 .muxname = "mb93493.0",
39 .muxdata = __region_CS3 + 0x3d0,
40 .doirq = frv_mb93493_doirq,
44 .muxname = "mb93493.1",
45 .muxdata = __region_CS3 + 0x3d4,
46 .doirq = frv_mb93493_doirq,
51 static void frv_mb93493_control(struct irq_group *group, int index, int on)
53 struct irq_source *source;
56 if ((frv_mb93493[0].irqmask & (1 << index)))
57 source = &frv_mb93493[0];
59 source = &frv_mb93493[1];
61 iqsr = readl(source->muxdata);
63 iqsr |= 1 << (index + 16);
65 iqsr &= ~(1 << (index + 16));
67 writel(iqsr, source->muxdata);
70 static struct irq_group frv_mb93493_irqs = {
71 .first_irq = IRQ_BASE_MB93493,
72 .control = frv_mb93493_control,
75 static void frv_mb93493_doirq(struct irq_source *source)
77 uint32_t mask = readl(source->muxdata);
78 mask = mask & (mask >> 16) & 0xffff;
81 distribute_irqs(&frv_mb93493_irqs, mask);
84 static void __init mb93493_irq_route(int irq, int source)
86 frv_mb93493[source].irqmask |= 1 << (irq - IRQ_BASE_MB93493);
87 frv_mb93493_irqs.sources[irq - IRQ_BASE_MB93493] = &frv_mb93493[source];
90 void __init route_mb93493_irqs(void)
92 frv_irq_route_external(&frv_mb93493[0], IRQ_CPU_MB93493_0);
93 frv_irq_route_external(&frv_mb93493[1], IRQ_CPU_MB93493_1);
95 frv_irq_set_group(&frv_mb93493_irqs);
97 mb93493_irq_route(IRQ_MB93493_VDC, IRQ_MB93493_VDC_ROUTE);
98 mb93493_irq_route(IRQ_MB93493_VCC, IRQ_MB93493_VCC_ROUTE);
99 mb93493_irq_route(IRQ_MB93493_AUDIO_IN, IRQ_MB93493_AUDIO_IN_ROUTE);
100 mb93493_irq_route(IRQ_MB93493_I2C_0, IRQ_MB93493_I2C_0_ROUTE);
101 mb93493_irq_route(IRQ_MB93493_I2C_1, IRQ_MB93493_I2C_1_ROUTE);
102 mb93493_irq_route(IRQ_MB93493_USB, IRQ_MB93493_USB_ROUTE);
103 mb93493_irq_route(IRQ_MB93493_LOCAL_BUS, IRQ_MB93493_LOCAL_BUS_ROUTE);
104 mb93493_irq_route(IRQ_MB93493_PCMCIA, IRQ_MB93493_PCMCIA_ROUTE);
105 mb93493_irq_route(IRQ_MB93493_GPIO, IRQ_MB93493_GPIO_ROUTE);
106 mb93493_irq_route(IRQ_MB93493_AUDIO_OUT, IRQ_MB93493_AUDIO_OUT_ROUTE);