| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* irq-mb93493.c: MB93493 companion chip interrupt handler |
| 2 | * |
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 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. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/ptrace.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/signal.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/ioport.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/irq.h> |
| 21 | |
| 22 | #include <asm/io.h> |
| 23 | #include <asm/system.h> |
| 24 | #include <asm/bitops.h> |
| 25 | #include <asm/delay.h> |
| 26 | #include <asm/irq.h> |
| 27 | #include <asm/irc-regs.h> |
| 28 | #include <asm/irq-routing.h> |
| 29 | #include <asm/mb93493-irqs.h> |
| 30 | |
| 31 | static void frv_mb93493_doirq(struct irq_source *source); |
| 32 | |
| 33 | /*****************************************************************************/ |
| 34 | /* |
| 35 | * MB93493 companion chip IRQ multiplexor |
| 36 | */ |
| 37 | static struct irq_source frv_mb93493[2] = { |
| 38 | [0] = { |
| 39 | .muxname = "mb93493.0", |
| 40 | .muxdata = __region_CS3 + 0x3d0, |
| 41 | .doirq = frv_mb93493_doirq, |
| 42 | .irqmask = 0x0000, |
| 43 | }, |
| 44 | [1] = { |
| 45 | .muxname = "mb93493.1", |
| 46 | .muxdata = __region_CS3 + 0x3d4, |
| 47 | .doirq = frv_mb93493_doirq, |
| 48 | .irqmask = 0x0000, |
| 49 | }, |
| 50 | }; |
| 51 | |
| 52 | static void frv_mb93493_control(struct irq_group *group, int index, int on) |
| 53 | { |
| 54 | struct irq_source *source; |
| 55 | uint32_t iqsr; |
| 56 | |
| 57 | if ((frv_mb93493[0].irqmask & (1 << index))) |
| 58 | source = &frv_mb93493[0]; |
| 59 | else |
| 60 | source = &frv_mb93493[1]; |
| 61 | |
| 62 | iqsr = readl(source->muxdata); |
| 63 | if (on) |
| 64 | iqsr |= 1 << (index + 16); |
| 65 | else |
| 66 | iqsr &= ~(1 << (index + 16)); |
| 67 | |
| 68 | writel(iqsr, source->muxdata); |
| 69 | } |
| 70 | |
| 71 | static struct irq_group frv_mb93493_irqs = { |
| 72 | .first_irq = IRQ_BASE_MB93493, |
| 73 | .control = frv_mb93493_control, |
| 74 | }; |
| 75 | |
| 76 | static void frv_mb93493_doirq(struct irq_source *source) |
| 77 | { |
| 78 | uint32_t mask = readl(source->muxdata); |
| 79 | mask = mask & (mask >> 16) & 0xffff; |
| 80 | |
| 81 | if (mask) |
| 82 | distribute_irqs(&frv_mb93493_irqs, mask); |
| 83 | } |
| 84 | |
| 85 | static void __init mb93493_irq_route(int irq, int source) |
| 86 | { |
| 87 | frv_mb93493[source].irqmask |= 1 << (irq - IRQ_BASE_MB93493); |
| 88 | frv_mb93493_irqs.sources[irq - IRQ_BASE_MB93493] = &frv_mb93493[source]; |
| 89 | } |
| 90 | |
| 91 | void __init route_mb93493_irqs(void) |
| 92 | { |
| 93 | frv_irq_route_external(&frv_mb93493[0], IRQ_CPU_MB93493_0); |
| 94 | frv_irq_route_external(&frv_mb93493[1], IRQ_CPU_MB93493_1); |
| 95 | |
| 96 | frv_irq_set_group(&frv_mb93493_irqs); |
| 97 | |
| 98 | mb93493_irq_route(IRQ_MB93493_VDC, IRQ_MB93493_VDC_ROUTE); |
| 99 | mb93493_irq_route(IRQ_MB93493_VCC, IRQ_MB93493_VCC_ROUTE); |
| 100 | mb93493_irq_route(IRQ_MB93493_AUDIO_IN, IRQ_MB93493_AUDIO_IN_ROUTE); |
| 101 | mb93493_irq_route(IRQ_MB93493_I2C_0, IRQ_MB93493_I2C_0_ROUTE); |
| 102 | mb93493_irq_route(IRQ_MB93493_I2C_1, IRQ_MB93493_I2C_1_ROUTE); |
| 103 | mb93493_irq_route(IRQ_MB93493_USB, IRQ_MB93493_USB_ROUTE); |
| 104 | mb93493_irq_route(IRQ_MB93493_LOCAL_BUS, IRQ_MB93493_LOCAL_BUS_ROUTE); |
| 105 | mb93493_irq_route(IRQ_MB93493_PCMCIA, IRQ_MB93493_PCMCIA_ROUTE); |
| 106 | mb93493_irq_route(IRQ_MB93493_GPIO, IRQ_MB93493_GPIO_ROUTE); |
| 107 | mb93493_irq_route(IRQ_MB93493_AUDIO_OUT, IRQ_MB93493_AUDIO_OUT_ROUTE); |
| 108 | } |