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Diffstat (limited to 'arch/mips/momentum/ocelot_c/cpci-irq.c')
-rw-r--r--arch/mips/momentum/ocelot_c/cpci-irq.c100
1 files changed, 0 insertions, 100 deletions
diff --git a/arch/mips/momentum/ocelot_c/cpci-irq.c b/arch/mips/momentum/ocelot_c/cpci-irq.c
deleted file mode 100644
index 186a140fd2a9..000000000000
--- a/arch/mips/momentum/ocelot_c/cpci-irq.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright 2002 Momentum Computer
- * Author: mdharm@momenco.com
- *
- * arch/mips/momentum/ocelot_c/cpci-irq.c
- * Interrupt routines for cpci. Interrupt numbers are assigned from
- * CPCI_IRQ_BASE to CPCI_IRQ_BASE+8 (8 interrupt sources).
- *
- * Note that the high-level software will need to be careful about using
- * these interrupts. If this board is asserting a cPCI interrupt, it will
- * also see the asserted interrupt. Care must be taken to avoid an
- * interrupt flood.
- *
- * 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/module.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <asm/io.h>
-#include "ocelot_c_fpga.h"
-
-#define CPCI_IRQ_BASE 8
-
-static inline int ls1bit8(unsigned int x)
-{
- int b = 7, s;
-
- s = 4; if (((unsigned char)(x << 4)) == 0) s = 0; b -= s; x <<= s;
- s = 2; if (((unsigned char)(x << 2)) == 0) s = 0; b -= s; x <<= s;
- s = 1; if (((unsigned char)(x << 1)) == 0) s = 0; b -= s;
-
- return b;
-}
-
-/* mask off an interrupt -- 0 is enable, 1 is disable */
-static inline void mask_cpci_irq(unsigned int irq)
-{
- uint32_t value;
-
- value = OCELOT_FPGA_READ(INTMASK);
- value |= 1 << (irq - CPCI_IRQ_BASE);
- OCELOT_FPGA_WRITE(value, INTMASK);
-
- /* read the value back to assure that it's really been written */
- value = OCELOT_FPGA_READ(INTMASK);
-}
-
-/* unmask an interrupt -- 0 is enable, 1 is disable */
-static inline void unmask_cpci_irq(unsigned int irq)
-{
- uint32_t value;
-
- value = OCELOT_FPGA_READ(INTMASK);
- value &= ~(1 << (irq - CPCI_IRQ_BASE));
- OCELOT_FPGA_WRITE(value, INTMASK);
-
- /* read the value back to assure that it's really been written */
- value = OCELOT_FPGA_READ(INTMASK);
-}
-
-/*
- * Interrupt handler for interrupts coming from the FPGA chip.
- * It could be built in ethernet ports etc...
- */
-void ll_cpci_irq(void)
-{
- unsigned int irq_src, irq_mask;
-
- /* read the interrupt status registers */
- irq_src = OCELOT_FPGA_READ(INTSTAT);
- irq_mask = OCELOT_FPGA_READ(INTMASK);
-
- /* mask for just the interrupts we want */
- irq_src &= ~irq_mask;
-
- do_IRQ(ls1bit8(irq_src) + CPCI_IRQ_BASE);
-}
-
-struct irq_chip cpci_irq_type = {
- .name = "CPCI/FPGA",
- .ack = mask_cpci_irq,
- .mask = mask_cpci_irq,
- .mask_ack = mask_cpci_irq,
- .unmask = unmask_cpci_irq,
-};
-
-void cpci_irq_init(void)
-{
- int i;
-
- for (i = CPCI_IRQ_BASE; i < (CPCI_IRQ_BASE + 8); i++)
- set_irq_chip_and_handler(i, &cpci_irq_type, handle_level_irq);
-}
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