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6044cf1d94
Handle the IRQ multiplexer in the FPGA by implementing a cascade interrupt driver for it. Signed-off-by: David Howells <dhowells@redhat.com>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* ASB2364 initialisation
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*
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* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/setup.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/intctl-regs.h>
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#include <unit/fpga-regs.h>
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/*
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* initialise some of the unit hardware before gdbstub is set up
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*/
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asmlinkage void __init unit_init(void)
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{
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/* set up the external interrupts */
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/* XIRQ[0]: NAND RXBY */
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/* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */
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/* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */
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SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL);
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/* XIRQ[2]: Extend Slot 1-9 */
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/* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */
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#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) && \
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defined(CONFIG_ETHERNET_IRQ_LEVEL) && \
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(CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL)
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# error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL
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#endif
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#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL)
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set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL));
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#elif defined(CONFIG_ETHERNET_IRQ_LEVEL)
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set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL));
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#endif
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}
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/*
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* initialise the rest of the unit hardware after gdbstub is ready
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*/
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asmlinkage void __init unit_setup(void)
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{
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}
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/*
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* initialise the external interrupts used by a unit of this type
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*/
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void __init unit_init_IRQ(void)
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{
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unsigned int extnum;
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for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) {
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switch (GET_XIRQ_TRIGGER(extnum)) {
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/* LEVEL triggered interrupts should be made
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* post-ACK'able as they hold their lines until
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* serviced
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*/
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case XIRQ_TRIGGER_HILEVEL:
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case XIRQ_TRIGGER_LOWLEVEL:
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mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum));
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break;
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default:
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break;
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}
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}
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#define IRQCTL __SYSREG(0xd5000090, u32)
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IRQCTL |= 0x02;
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irq_fpga_init();
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}
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