81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/mxs.h>
|
|
#include <mach/common.h>
|
|
|
|
#define HW_ICOLL_VECTOR 0x0000
|
|
#define HW_ICOLL_LEVELACK 0x0010
|
|
#define HW_ICOLL_CTRL 0x0020
|
|
#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10)
|
|
#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10)
|
|
#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004
|
|
#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1
|
|
|
|
static void __iomem *icoll_base = MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR);
|
|
|
|
static void icoll_ack_irq(struct irq_data *d)
|
|
{
|
|
/*
|
|
* The Interrupt Collector is able to prioritize irqs.
|
|
* Currently only level 0 is used. So acking can use
|
|
* BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 unconditionally.
|
|
*/
|
|
__raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0,
|
|
icoll_base + HW_ICOLL_LEVELACK);
|
|
}
|
|
|
|
static void icoll_mask_irq(struct irq_data *d)
|
|
{
|
|
__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
|
|
icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->irq));
|
|
}
|
|
|
|
static void icoll_unmask_irq(struct irq_data *d)
|
|
{
|
|
__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
|
|
icoll_base + HW_ICOLL_INTERRUPTn_SET(d->irq));
|
|
}
|
|
|
|
static struct irq_chip mxs_icoll_chip = {
|
|
.irq_ack = icoll_ack_irq,
|
|
.irq_mask = icoll_mask_irq,
|
|
.irq_unmask = icoll_unmask_irq,
|
|
};
|
|
|
|
void __init icoll_init_irq(void)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Interrupt Collector reset, which initializes the priority
|
|
* for each irq to level 0.
|
|
*/
|
|
mxs_reset_block(icoll_base + HW_ICOLL_CTRL);
|
|
|
|
for (i = 0; i < MXS_INTERNAL_IRQS; i++) {
|
|
irq_set_chip_and_handler(i, &mxs_icoll_chip, handle_level_irq);
|
|
set_irq_flags(i, IRQF_VALID);
|
|
}
|
|
}
|