forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.1 KiB
128 lines
4.1 KiB
/* |
|
* Copyright 2001 MontaVista Software Inc. |
|
* Author: MontaVista Software, Inc. |
|
* [email protected] |
|
* |
|
* This file is subject to the terms and conditions of the GNU General Public |
|
* License. See the file "COPYING" in the main directory of this archive |
|
* for more details. |
|
* |
|
* Copyright (C) 2000-2001 Toshiba Corporation |
|
* |
|
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
* |
|
* 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., |
|
* 675 Mass Ave, Cambridge, MA 02139, USA. |
|
*/ |
|
#include <linux/init.h> |
|
#include <linux/types.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/irq.h> |
|
|
|
#include <asm/io.h> |
|
#include <asm/mipsregs.h> |
|
#include <asm/txx9/generic.h> |
|
#include <asm/txx9/jmr3927.h> |
|
|
|
#if JMR3927_IRQ_END > NR_IRQS |
|
#error JMR3927_IRQ_END > NR_IRQS |
|
#endif |
|
|
|
/* |
|
* CP0_STATUS is a thread's resource (saved/restored on context switch). |
|
* So disable_irq/enable_irq MUST handle IOC/IRC registers. |
|
*/ |
|
static void mask_irq_ioc(struct irq_data *d) |
|
{ |
|
/* 0: mask */ |
|
unsigned int irq_nr = d->irq - JMR3927_IRQ_IOC; |
|
unsigned char imask = jmr3927_ioc_reg_in(JMR3927_IOC_INTM_ADDR); |
|
unsigned int bit = 1 << irq_nr; |
|
jmr3927_ioc_reg_out(imask & ~bit, JMR3927_IOC_INTM_ADDR); |
|
/* flush write buffer */ |
|
(void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR); |
|
} |
|
static void unmask_irq_ioc(struct irq_data *d) |
|
{ |
|
/* 0: mask */ |
|
unsigned int irq_nr = d->irq - JMR3927_IRQ_IOC; |
|
unsigned char imask = jmr3927_ioc_reg_in(JMR3927_IOC_INTM_ADDR); |
|
unsigned int bit = 1 << irq_nr; |
|
jmr3927_ioc_reg_out(imask | bit, JMR3927_IOC_INTM_ADDR); |
|
/* flush write buffer */ |
|
(void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR); |
|
} |
|
|
|
static int jmr3927_ioc_irqroute(void) |
|
{ |
|
unsigned char istat = jmr3927_ioc_reg_in(JMR3927_IOC_INTS2_ADDR); |
|
int i; |
|
|
|
for (i = 0; i < JMR3927_NR_IRQ_IOC; i++) { |
|
if (istat & (1 << i)) |
|
return JMR3927_IRQ_IOC + i; |
|
} |
|
return -1; |
|
} |
|
|
|
static int jmr3927_irq_dispatch(int pending) |
|
{ |
|
int irq; |
|
|
|
if ((pending & CAUSEF_IP7) == 0) |
|
return -1; |
|
irq = (pending >> CAUSEB_IP2) & 0x0f; |
|
irq += JMR3927_IRQ_IRC; |
|
if (irq == JMR3927_IRQ_IOCINT) |
|
irq = jmr3927_ioc_irqroute(); |
|
return irq; |
|
} |
|
|
|
static struct irq_chip jmr3927_irq_ioc = { |
|
.name = "jmr3927_ioc", |
|
.irq_mask = mask_irq_ioc, |
|
.irq_unmask = unmask_irq_ioc, |
|
}; |
|
|
|
void __init jmr3927_irq_setup(void) |
|
{ |
|
int i; |
|
|
|
txx9_irq_dispatch = jmr3927_irq_dispatch; |
|
/* Now, interrupt control disabled, */ |
|
/* all IRC interrupts are masked, */ |
|
/* all IRC interrupt mode are Low Active. */ |
|
|
|
/* mask all IOC interrupts */ |
|
jmr3927_ioc_reg_out(0, JMR3927_IOC_INTM_ADDR); |
|
/* setup IOC interrupt mode (SOFT:High Active, Others:Low Active) */ |
|
jmr3927_ioc_reg_out(JMR3927_IOC_INTF_SOFT, JMR3927_IOC_INTP_ADDR); |
|
|
|
/* clear PCI Soft interrupts */ |
|
jmr3927_ioc_reg_out(0, JMR3927_IOC_INTS1_ADDR); |
|
/* clear PCI Reset interrupts */ |
|
jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR); |
|
|
|
tx3927_irq_init(); |
|
for (i = JMR3927_IRQ_IOC; i < JMR3927_IRQ_IOC + JMR3927_NR_IRQ_IOC; i++) |
|
irq_set_chip_and_handler(i, &jmr3927_irq_ioc, |
|
handle_level_irq); |
|
|
|
/* setup IOC interrupt 1 (PCI, MODEM) */ |
|
irq_set_chained_handler(JMR3927_IRQ_IOCINT, handle_simple_irq); |
|
}
|
|
|