29eb51a728
the series of patches for irqdomain core in 3.11 has broken sirf irq which uses legacy mapping. all users fail in the new kernel while setupping irq. this patch moves to linear irqdomain and drop old legacy irqdomain codes since we don't need it any more, and at the same time, it also fixes the broken interrupts of sirfsoc in 3.11. on the other hand, we actually only have 64 interrupt sources for prima2 and atlas6, but there are 128 interrupt souces for marco which uses GIC. in the legacy codes, sirf gpio also uses legacy irqdomain, so to make gpio interrupt mapping not depend on the prima2/atlas6/marco an use unified marco,we enlarge prima2/atlas6 interrupt number to 128. here we don't need this workaround any more as sirf gpio also moved to linear mode before. so we move SIRFSOC_NUM_IRQS back to 64 too. Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Olof Johansson <olof@lixom.net>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* interrupt controller support for CSR SiRFprimaII
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*
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* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
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*
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* Licensed under GPLv2 or later.
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/irqdomain.h>
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#include <linux/syscore_ops.h>
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#include <asm/mach/irq.h>
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#include <asm/exception.h>
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#include "irqchip.h"
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#define SIRFSOC_INT_RISC_MASK0 0x0018
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#define SIRFSOC_INT_RISC_MASK1 0x001C
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#define SIRFSOC_INT_RISC_LEVEL0 0x0020
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#define SIRFSOC_INT_RISC_LEVEL1 0x0024
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#define SIRFSOC_INIT_IRQ_ID 0x0038
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#define SIRFSOC_NUM_IRQS 64
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static struct irq_domain *sirfsoc_irqdomain;
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static __init void
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sirfsoc_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num)
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{
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struct irq_chip_generic *gc;
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struct irq_chip_type *ct;
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int ret;
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unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
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ret = irq_alloc_domain_generic_chips(sirfsoc_irqdomain, num, 1, "irq_sirfsoc",
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handle_level_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE);
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gc = irq_get_domain_generic_chip(sirfsoc_irqdomain, irq_start);
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gc->reg_base = base;
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ct = gc->chip_types;
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ct->chip.irq_mask = irq_gc_mask_clr_bit;
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ct->chip.irq_unmask = irq_gc_mask_set_bit;
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ct->regs.mask = SIRFSOC_INT_RISC_MASK0;
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}
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static asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
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{
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void __iomem *base = sirfsoc_irqdomain->host_data;
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u32 irqstat, irqnr;
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irqstat = readl_relaxed(base + SIRFSOC_INIT_IRQ_ID);
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irqnr = irq_find_mapping(sirfsoc_irqdomain, irqstat & 0xff);
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handle_IRQ(irqnr, regs);
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}
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static int __init sirfsoc_irq_init(struct device_node *np, struct device_node *parent)
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{
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void __iomem *base = of_iomap(np, 0);
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if (!base)
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panic("unable to map intc cpu registers\n");
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sirfsoc_irqdomain = irq_domain_add_linear(np, SIRFSOC_NUM_IRQS,
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&irq_generic_chip_ops, base);
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sirfsoc_alloc_gc(base, 0, 32);
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sirfsoc_alloc_gc(base + 4, 32, SIRFSOC_NUM_IRQS - 32);
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writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL0);
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writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL1);
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writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK0);
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writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK1);
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set_handle_irq(sirfsoc_handle_irq);
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return 0;
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}
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IRQCHIP_DECLARE(sirfsoc_intc, "sirf,prima2-intc", sirfsoc_irq_init);
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struct sirfsoc_irq_status {
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u32 mask0;
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u32 mask1;
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u32 level0;
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u32 level1;
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};
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static struct sirfsoc_irq_status sirfsoc_irq_st;
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static int sirfsoc_irq_suspend(void)
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{
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void __iomem *base = sirfsoc_irqdomain->host_data;
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sirfsoc_irq_st.mask0 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK0);
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sirfsoc_irq_st.mask1 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK1);
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sirfsoc_irq_st.level0 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL0);
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sirfsoc_irq_st.level1 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL1);
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return 0;
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}
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static void sirfsoc_irq_resume(void)
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{
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void __iomem *base = sirfsoc_irqdomain->host_data;
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writel_relaxed(sirfsoc_irq_st.mask0, base + SIRFSOC_INT_RISC_MASK0);
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writel_relaxed(sirfsoc_irq_st.mask1, base + SIRFSOC_INT_RISC_MASK1);
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writel_relaxed(sirfsoc_irq_st.level0, base + SIRFSOC_INT_RISC_LEVEL0);
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writel_relaxed(sirfsoc_irq_st.level1, base + SIRFSOC_INT_RISC_LEVEL1);
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}
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static struct syscore_ops sirfsoc_irq_syscore_ops = {
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.suspend = sirfsoc_irq_suspend,
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.resume = sirfsoc_irq_resume,
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};
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static int __init sirfsoc_irq_pm_init(void)
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{
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if (!sirfsoc_irqdomain)
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return 0;
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register_syscore_ops(&sirfsoc_irq_syscore_ops);
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return 0;
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}
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device_initcall(sirfsoc_irq_pm_init);
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