From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/arm/mach-rpc/irq.c | 162 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 arch/arm/mach-rpc/irq.c (limited to 'arch/arm/mach-rpc/irq.c') diff --git a/arch/arm/mach-rpc/irq.c b/arch/arm/mach-rpc/irq.c new file mode 100644 index 00000000000..56b2716f8cf --- /dev/null +++ b/arch/arm/mach-rpc/irq.c @@ -0,0 +1,162 @@ +#include +#include + +#include +#include +#include +#include + +static void iomd_ack_irq_a(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << irq; + val = iomd_readb(IOMD_IRQMASKA); + iomd_writeb(val & ~mask, IOMD_IRQMASKA); + iomd_writeb(mask, IOMD_IRQCLRA); +} + +static void iomd_mask_irq_a(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << irq; + val = iomd_readb(IOMD_IRQMASKA); + iomd_writeb(val & ~mask, IOMD_IRQMASKA); +} + +static void iomd_unmask_irq_a(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << irq; + val = iomd_readb(IOMD_IRQMASKA); + iomd_writeb(val | mask, IOMD_IRQMASKA); +} + +static struct irqchip iomd_a_chip = { + .ack = iomd_ack_irq_a, + .mask = iomd_mask_irq_a, + .unmask = iomd_unmask_irq_a, +}; + +static void iomd_mask_irq_b(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_IRQMASKB); + iomd_writeb(val & ~mask, IOMD_IRQMASKB); +} + +static void iomd_unmask_irq_b(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_IRQMASKB); + iomd_writeb(val | mask, IOMD_IRQMASKB); +} + +static struct irqchip iomd_b_chip = { + .ack = iomd_mask_irq_b, + .mask = iomd_mask_irq_b, + .unmask = iomd_unmask_irq_b, +}; + +static void iomd_mask_irq_dma(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_DMAMASK); + iomd_writeb(val & ~mask, IOMD_DMAMASK); +} + +static void iomd_unmask_irq_dma(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_DMAMASK); + iomd_writeb(val | mask, IOMD_DMAMASK); +} + +static struct irqchip iomd_dma_chip = { + .ack = iomd_mask_irq_dma, + .mask = iomd_mask_irq_dma, + .unmask = iomd_unmask_irq_dma, +}; + +static void iomd_mask_irq_fiq(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_FIQMASK); + iomd_writeb(val & ~mask, IOMD_FIQMASK); +} + +static void iomd_unmask_irq_fiq(unsigned int irq) +{ + unsigned int val, mask; + + mask = 1 << (irq & 7); + val = iomd_readb(IOMD_FIQMASK); + iomd_writeb(val | mask, IOMD_FIQMASK); +} + +static struct irqchip iomd_fiq_chip = { + .ack = iomd_mask_irq_fiq, + .mask = iomd_mask_irq_fiq, + .unmask = iomd_unmask_irq_fiq, +}; + +void __init rpc_init_irq(void) +{ + unsigned int irq, flags; + + iomd_writeb(0, IOMD_IRQMASKA); + iomd_writeb(0, IOMD_IRQMASKB); + iomd_writeb(0, IOMD_FIQMASK); + iomd_writeb(0, IOMD_DMAMASK); + + for (irq = 0; irq < NR_IRQS; irq++) { + flags = IRQF_VALID; + + if (irq <= 6 || (irq >= 9 && irq <= 15)) + flags |= IRQF_PROBE; + + if (irq == 21 || (irq >= 16 && irq <= 19) || + irq == IRQ_KEYBOARDTX) + flags |= IRQF_NOAUTOEN; + + switch (irq) { + case 0 ... 7: + set_irq_chip(irq, &iomd_a_chip); + set_irq_handler(irq, do_level_IRQ); + set_irq_flags(irq, flags); + break; + + case 8 ... 15: + set_irq_chip(irq, &iomd_b_chip); + set_irq_handler(irq, do_level_IRQ); + set_irq_flags(irq, flags); + break; + + case 16 ... 21: + set_irq_chip(irq, &iomd_dma_chip); + set_irq_handler(irq, do_level_IRQ); + set_irq_flags(irq, flags); + break; + + case 64 ... 71: + set_irq_chip(irq, &iomd_fiq_chip); + set_irq_flags(irq, IRQF_VALID); + break; + } + } + + init_FIQ(); +} + -- cgit v1.2.3