| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/init.h> |
| 2 | #include <linux/list.h> |
| 3 | |
| 4 | #include <asm/mach/irq.h> |
| 5 | #include <asm/hardware/iomd.h> |
| 6 | #include <asm/irq.h> |
| 7 | #include <asm/io.h> |
| 8 | |
| 9 | static void iomd_ack_irq_a(unsigned int irq) |
| 10 | { |
| 11 | unsigned int val, mask; |
| 12 | |
| 13 | mask = 1 << irq; |
| 14 | val = iomd_readb(IOMD_IRQMASKA); |
| 15 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 16 | iomd_writeb(mask, IOMD_IRQCLRA); |
| 17 | } |
| 18 | |
| 19 | static void iomd_mask_irq_a(unsigned int irq) |
| 20 | { |
| 21 | unsigned int val, mask; |
| 22 | |
| 23 | mask = 1 << irq; |
| 24 | val = iomd_readb(IOMD_IRQMASKA); |
| 25 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 26 | } |
| 27 | |
| 28 | static void iomd_unmask_irq_a(unsigned int irq) |
| 29 | { |
| 30 | unsigned int val, mask; |
| 31 | |
| 32 | mask = 1 << irq; |
| 33 | val = iomd_readb(IOMD_IRQMASKA); |
| 34 | iomd_writeb(val | mask, IOMD_IRQMASKA); |
| 35 | } |
| 36 | |
| 37 | static struct irqchip iomd_a_chip = { |
| 38 | .ack = iomd_ack_irq_a, |
| 39 | .mask = iomd_mask_irq_a, |
| 40 | .unmask = iomd_unmask_irq_a, |
| 41 | }; |
| 42 | |
| 43 | static void iomd_mask_irq_b(unsigned int irq) |
| 44 | { |
| 45 | unsigned int val, mask; |
| 46 | |
| 47 | mask = 1 << (irq & 7); |
| 48 | val = iomd_readb(IOMD_IRQMASKB); |
| 49 | iomd_writeb(val & ~mask, IOMD_IRQMASKB); |
| 50 | } |
| 51 | |
| 52 | static void iomd_unmask_irq_b(unsigned int irq) |
| 53 | { |
| 54 | unsigned int val, mask; |
| 55 | |
| 56 | mask = 1 << (irq & 7); |
| 57 | val = iomd_readb(IOMD_IRQMASKB); |
| 58 | iomd_writeb(val | mask, IOMD_IRQMASKB); |
| 59 | } |
| 60 | |
| 61 | static struct irqchip iomd_b_chip = { |
| 62 | .ack = iomd_mask_irq_b, |
| 63 | .mask = iomd_mask_irq_b, |
| 64 | .unmask = iomd_unmask_irq_b, |
| 65 | }; |
| 66 | |
| 67 | static void iomd_mask_irq_dma(unsigned int irq) |
| 68 | { |
| 69 | unsigned int val, mask; |
| 70 | |
| 71 | mask = 1 << (irq & 7); |
| 72 | val = iomd_readb(IOMD_DMAMASK); |
| 73 | iomd_writeb(val & ~mask, IOMD_DMAMASK); |
| 74 | } |
| 75 | |
| 76 | static void iomd_unmask_irq_dma(unsigned int irq) |
| 77 | { |
| 78 | unsigned int val, mask; |
| 79 | |
| 80 | mask = 1 << (irq & 7); |
| 81 | val = iomd_readb(IOMD_DMAMASK); |
| 82 | iomd_writeb(val | mask, IOMD_DMAMASK); |
| 83 | } |
| 84 | |
| 85 | static struct irqchip iomd_dma_chip = { |
| 86 | .ack = iomd_mask_irq_dma, |
| 87 | .mask = iomd_mask_irq_dma, |
| 88 | .unmask = iomd_unmask_irq_dma, |
| 89 | }; |
| 90 | |
| 91 | static void iomd_mask_irq_fiq(unsigned int irq) |
| 92 | { |
| 93 | unsigned int val, mask; |
| 94 | |
| 95 | mask = 1 << (irq & 7); |
| 96 | val = iomd_readb(IOMD_FIQMASK); |
| 97 | iomd_writeb(val & ~mask, IOMD_FIQMASK); |
| 98 | } |
| 99 | |
| 100 | static void iomd_unmask_irq_fiq(unsigned int irq) |
| 101 | { |
| 102 | unsigned int val, mask; |
| 103 | |
| 104 | mask = 1 << (irq & 7); |
| 105 | val = iomd_readb(IOMD_FIQMASK); |
| 106 | iomd_writeb(val | mask, IOMD_FIQMASK); |
| 107 | } |
| 108 | |
| 109 | static struct irqchip iomd_fiq_chip = { |
| 110 | .ack = iomd_mask_irq_fiq, |
| 111 | .mask = iomd_mask_irq_fiq, |
| 112 | .unmask = iomd_unmask_irq_fiq, |
| 113 | }; |
| 114 | |
| 115 | void __init rpc_init_irq(void) |
| 116 | { |
| 117 | unsigned int irq, flags; |
| 118 | |
| 119 | iomd_writeb(0, IOMD_IRQMASKA); |
| 120 | iomd_writeb(0, IOMD_IRQMASKB); |
| 121 | iomd_writeb(0, IOMD_FIQMASK); |
| 122 | iomd_writeb(0, IOMD_DMAMASK); |
| 123 | |
| 124 | for (irq = 0; irq < NR_IRQS; irq++) { |
| 125 | flags = IRQF_VALID; |
| 126 | |
| 127 | if (irq <= 6 || (irq >= 9 && irq <= 15)) |
| 128 | flags |= IRQF_PROBE; |
| 129 | |
| 130 | if (irq == 21 || (irq >= 16 && irq <= 19) || |
| 131 | irq == IRQ_KEYBOARDTX) |
| 132 | flags |= IRQF_NOAUTOEN; |
| 133 | |
| 134 | switch (irq) { |
| 135 | case 0 ... 7: |
| 136 | set_irq_chip(irq, &iomd_a_chip); |
| 137 | set_irq_handler(irq, do_level_IRQ); |
| 138 | set_irq_flags(irq, flags); |
| 139 | break; |
| 140 | |
| 141 | case 8 ... 15: |
| 142 | set_irq_chip(irq, &iomd_b_chip); |
| 143 | set_irq_handler(irq, do_level_IRQ); |
| 144 | set_irq_flags(irq, flags); |
| 145 | break; |
| 146 | |
| 147 | case 16 ... 21: |
| 148 | set_irq_chip(irq, &iomd_dma_chip); |
| 149 | set_irq_handler(irq, do_level_IRQ); |
| 150 | set_irq_flags(irq, flags); |
| 151 | break; |
| 152 | |
| 153 | case 64 ... 71: |
| 154 | set_irq_chip(irq, &iomd_fiq_chip); |
| 155 | set_irq_flags(irq, IRQF_VALID); |
| 156 | break; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | init_FIQ(); |
| 161 | } |
| 162 | |