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
|
|
*
|
|
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.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/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/intctl-regs.h>
|
|
#include <unit/fpga-regs.h>
|
|
|
|
/*
|
|
* initialise some of the unit hardware before gdbstub is set up
|
|
*/
|
|
asmlinkage void __init unit_init(void)
|
|
{
|
|
/* set up the external interrupts */
|
|
|
|
/* XIRQ[0]: NAND RXBY */
|
|
/* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */
|
|
|
|
/* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */
|
|
SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL);
|
|
|
|
/* XIRQ[2]: Extend Slot 1-9 */
|
|
/* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */
|
|
|
|
#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) && \
|
|
defined(CONFIG_ETHERNET_IRQ_LEVEL) && \
|
|
(CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL)
|
|
# error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL
|
|
#endif
|
|
|
|
#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL)
|
|
set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL));
|
|
#elif defined(CONFIG_ETHERNET_IRQ_LEVEL)
|
|
set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* initialise the rest of the unit hardware after gdbstub is ready
|
|
*/
|
|
asmlinkage void __init unit_setup(void)
|
|
{
|
|
|
|
}
|
|
|
|
/*
|
|
* initialise the external interrupts used by a unit of this type
|
|
*/
|
|
void __init unit_init_IRQ(void)
|
|
{
|
|
unsigned int extnum;
|
|
|
|
for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) {
|
|
switch (GET_XIRQ_TRIGGER(extnum)) {
|
|
/* LEVEL triggered interrupts should be made
|
|
* post-ACK'able as they hold their lines until
|
|
* serviced
|
|
*/
|
|
case XIRQ_TRIGGER_HILEVEL:
|
|
case XIRQ_TRIGGER_LOWLEVEL:
|
|
mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define IRQCTL __SYSREG(0xd5000090, u32)
|
|
IRQCTL |= 0x02;
|
|
|
|
irq_fpga_init();
|
|
}
|