diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 14:48:43 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 14:48:43 -0700 |
commit | 0f166396e7e8931bb4acfd1a6ea1bd4f0b43f1dd (patch) | |
tree | 6279fa70695a4c56b7e935018a4c0fc1dfa82e68 /arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c | |
parent | 5f60cfd932b42c69ed3226400cb5eab152576c3a (diff) | |
parent | 105b1bca4d7bed85bb296f7e7caec2fc643e9fbf (diff) |
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (62 commits)
[MIPS] PNX8550: Cleanup proc code.
[MIPS] WRPPMC: Fix build.
[MIPS] Yosemite: Fix modpost warnings.
[MIPS] Change names of local variables to silence sparse
[MIPS] SB1: Fix modpost warning.
[MIPS] PNX: Fix modpost warnings.
[MIPS] Alchemy: Fix modpost warnings.
[MIPS] Non-FPAFF: Fix warning.
[MIPS] DEC: Fix modpost warning.
[MIPS] MIPSsim: Enable MIPSsim virtual network driver.
[MIPS] Delete Ocelot 3 support.
[MIPS] remove LASAT Networks platforms support
[MIPS] Early check for SMTC kernel on non-MT processor
[MIPS] Add debugfs files to show fpuemu statistics
[MIPS] Add some debugfs files to debug unaligned accesses
[MIPS] rbtx4938: Fix secondary PCIC and glue internal NICs
[MIPS] tc35815: Load MAC address via platform_device
[MIPS] Move FPU affinity code into separate file.
[MIPS] Make ioremap() work on TX39/49 special unmapped segment
[MIPS] rbtx4938: Update and minimize defconfig
...
Diffstat (limited to 'arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c')
-rw-r--r-- | arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c b/arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c new file mode 100644 index 00000000000..5175357d0a2 --- /dev/null +++ b/arch/mips/pmc-sierra/msp71xx/msp_irq_cic.c @@ -0,0 +1,134 @@ +/* + * This file define the irq handler for MSP SLM subsystem interrupts. + * + * Copyright 2005-2007 PMC-Sierra, Inc, derived from irq_cpu.c + * Author: Andrew Hughes, Andrew_Hughes@pmc-sierra.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/bitops.h> + +#include <asm/system.h> + +#include <msp_cic_int.h> +#include <msp_regs.h> + +/* + * NOTE: We are only enabling support for VPE0 right now. + */ + +static inline void unmask_msp_cic_irq(unsigned int irq) +{ + + /* check for PER interrupt range */ + if (irq < MSP_PER_INTBASE) + *CIC_VPE0_MSK_REG |= (1 << (irq - MSP_CIC_INTBASE)); + else + *PER_INT_MSK_REG |= (1 << (irq - MSP_PER_INTBASE)); +} + +static inline void mask_msp_cic_irq(unsigned int irq) +{ + /* check for PER interrupt range */ + if (irq < MSP_PER_INTBASE) + *CIC_VPE0_MSK_REG &= ~(1 << (irq - MSP_CIC_INTBASE)); + else + *PER_INT_MSK_REG &= ~(1 << (irq - MSP_PER_INTBASE)); +} + +/* + * While we ack the interrupt interrupts are disabled and thus we don't need + * to deal with concurrency issues. Same for msp_cic_irq_end. + */ +static inline void ack_msp_cic_irq(unsigned int irq) +{ + mask_msp_cic_irq(irq); + + /* + * only really necessary for 18, 16-14 and sometimes 3:0 (since + * these can be edge sensitive) but it doesn't hurt for the others. + */ + + /* check for PER interrupt range */ + if (irq < MSP_PER_INTBASE) + *CIC_STS_REG = (1 << (irq - MSP_CIC_INTBASE)); + else + *PER_INT_STS_REG = (1 << (irq - MSP_PER_INTBASE)); +} + +static struct irq_chip msp_cic_irq_controller = { + .name = "MSP_CIC", + .ack = ack_msp_cic_irq, + .mask = ack_msp_cic_irq, + .mask_ack = ack_msp_cic_irq, + .unmask = unmask_msp_cic_irq, +}; + + +void __init msp_cic_irq_init(void) +{ + int i; + + /* Mask/clear interrupts. */ + *CIC_VPE0_MSK_REG = 0x00000000; + *PER_INT_MSK_REG = 0x00000000; + *CIC_STS_REG = 0xFFFFFFFF; + *PER_INT_STS_REG = 0xFFFFFFFF; + +#if defined(CONFIG_PMC_MSP7120_GW) || \ + defined(CONFIG_PMC_MSP7120_EVAL) + /* + * The MSP7120 RG and EVBD boards use IRQ[6:4] for PCI. + * These inputs map to EXT_INT_POL[6:4] inside the CIC. + * They are to be active low, level sensitive. + */ + *CIC_EXT_CFG_REG &= 0xFFFF8F8F; +#endif + + /* initialize all the IRQ descriptors */ + for (i = MSP_CIC_INTBASE; i < MSP_PER_INTBASE + 32; i++) + set_irq_chip_and_handler(i, &msp_cic_irq_controller, + handle_level_irq); +} + +void msp_cic_irq_dispatch(void) +{ + u32 pending; + int intbase; + + intbase = MSP_CIC_INTBASE; + pending = *CIC_STS_REG & *CIC_VPE0_MSK_REG; + + /* check for PER interrupt */ + if (pending == (1 << (MSP_INT_PER - MSP_CIC_INTBASE))) { + intbase = MSP_PER_INTBASE; + pending = *PER_INT_STS_REG & *PER_INT_MSK_REG; + } + + /* check for spurious interrupt */ + if (pending == 0x00000000) { + printk(KERN_ERR + "Spurious %s interrupt? status %08x, mask %08x\n", + (intbase == MSP_CIC_INTBASE) ? "CIC" : "PER", + (intbase == MSP_CIC_INTBASE) ? + *CIC_STS_REG : *PER_INT_STS_REG, + (intbase == MSP_CIC_INTBASE) ? + *CIC_VPE0_MSK_REG : *PER_INT_MSK_REG); + return; + } + + /* check for the timer and dispatch it first */ + if ((intbase == MSP_CIC_INTBASE) && + (pending & (1 << (MSP_INT_VPE0_TIMER - MSP_CIC_INTBASE)))) + do_IRQ(MSP_INT_VPE0_TIMER); + else + do_IRQ(ffs(pending) + intbase - 1); +} + |