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linux/arch/mips/tx4927/common/tx4927_irq.c
Atsushi Nemoto 70d21cdeef [MIPS] use name instead of typename for each irq_chip 
The "typename" field was obsoleted by the "name" field.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-06 16:53:14 +00:00

438 lines
9.8 KiB
C
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/*
* Common tx4927 irq handler
*
* Author: MontaVista Software, Inc.
* source@mvista.com
*
* 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/errno.h>
#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/timex.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/irq.h>
#include <linux/bitops.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
#include <asm/tx4927/tx4927.h>
/*
* DEBUG
*/
#undef TX4927_IRQ_DEBUG
#ifdef TX4927_IRQ_DEBUG
#define TX4927_IRQ_NONE 0x00000000
#define TX4927_IRQ_INFO ( 1 << 0 )
#define TX4927_IRQ_WARN ( 1 << 1 )
#define TX4927_IRQ_EROR ( 1 << 2 )
#define TX4927_IRQ_INIT ( 1 << 5 )
#define TX4927_IRQ_NEST1 ( 1 << 6 )
#define TX4927_IRQ_NEST2 ( 1 << 7 )
#define TX4927_IRQ_NEST3 ( 1 << 8 )
#define TX4927_IRQ_NEST4 ( 1 << 9 )
#define TX4927_IRQ_CP0_INIT ( 1 << 10 )
#define TX4927_IRQ_CP0_ENABLE ( 1 << 13 )
#define TX4927_IRQ_CP0_DISABLE ( 1 << 14 )
#define TX4927_IRQ_PIC_INIT ( 1 << 20 )
#define TX4927_IRQ_PIC_ENABLE ( 1 << 23 )
#define TX4927_IRQ_PIC_DISABLE ( 1 << 24 )
#define TX4927_IRQ_ALL 0xffffffff
#endif
#ifdef TX4927_IRQ_DEBUG
static const u32 tx4927_irq_debug_flag = (TX4927_IRQ_NONE
| TX4927_IRQ_INFO
| TX4927_IRQ_WARN | TX4927_IRQ_EROR
// | TX4927_IRQ_CP0_INIT
// | TX4927_IRQ_CP0_ENABLE
// | TX4927_IRQ_CP0_ENDIRQ
// | TX4927_IRQ_PIC_INIT
// | TX4927_IRQ_PIC_ENABLE
// | TX4927_IRQ_PIC_DISABLE
// | TX4927_IRQ_INIT
// | TX4927_IRQ_NEST1
// | TX4927_IRQ_NEST2
// | TX4927_IRQ_NEST3
// | TX4927_IRQ_NEST4
);
#endif
#ifdef TX4927_IRQ_DEBUG
#define TX4927_IRQ_DPRINTK(flag,str...) \
if ( (tx4927_irq_debug_flag) & (flag) ) \
{ \
char tmp[100]; \
sprintf( tmp, str ); \
printk( "%s(%s:%u)::%s", __FUNCTION__, __FILE__, __LINE__, tmp ); \
}
#else
#define TX4927_IRQ_DPRINTK(flag,str...)
#endif
/*
* Forwad definitions for all pic's
*/
static void tx4927_irq_cp0_enable(unsigned int irq);
static void tx4927_irq_cp0_disable(unsigned int irq);
static void tx4927_irq_pic_enable(unsigned int irq);
static void tx4927_irq_pic_disable(unsigned int irq);
/*
* Kernel structs for all pic's
*/
#define TX4927_CP0_NAME "TX4927-CP0"
static struct irq_chip tx4927_irq_cp0_type = {
.name = TX4927_CP0_NAME,
.ack = tx4927_irq_cp0_disable,
.mask = tx4927_irq_cp0_disable,
.mask_ack = tx4927_irq_cp0_disable,
.unmask = tx4927_irq_cp0_enable,
};
#define TX4927_PIC_NAME "TX4927-PIC"
static struct irq_chip tx4927_irq_pic_type = {
.name = TX4927_PIC_NAME,
.ack = tx4927_irq_pic_disable,
.mask = tx4927_irq_pic_disable,
.mask_ack = tx4927_irq_pic_disable,
.unmask = tx4927_irq_pic_enable,
};
#define TX4927_PIC_ACTION(s) { no_action, 0, CPU_MASK_NONE, s, NULL, NULL }
static struct irqaction tx4927_irq_pic_action =
TX4927_PIC_ACTION(TX4927_PIC_NAME);
#define CCP0_STATUS 12
#define CCP0_CAUSE 13
/*
* Functions for cp0
*/
#define tx4927_irq_cp0_mask(irq) ( 1 << ( irq-TX4927_IRQ_CP0_BEG+8 ) )
static void
tx4927_irq_cp0_modify(unsigned cp0_reg, unsigned clr_bits, unsigned set_bits)
{
unsigned long val = 0;
switch (cp0_reg) {
case CCP0_STATUS:
val = read_c0_status();
break;
case CCP0_CAUSE:
val = read_c0_cause();
break;
}
val &= (~clr_bits);
val |= (set_bits);
switch (cp0_reg) {
case CCP0_STATUS:{
write_c0_status(val);
break;
}
case CCP0_CAUSE:{
write_c0_cause(val);
break;
}
}
}
static void __init tx4927_irq_cp0_init(void)
{
int i;
TX4927_IRQ_DPRINTK(TX4927_IRQ_CP0_INIT, "beg=%d end=%d\n",
TX4927_IRQ_CP0_BEG, TX4927_IRQ_CP0_END);
for (i = TX4927_IRQ_CP0_BEG; i <= TX4927_IRQ_CP0_END; i++)
set_irq_chip_and_handler(i, &tx4927_irq_cp0_type,
handle_level_irq);
}
static void tx4927_irq_cp0_enable(unsigned int irq)
{
TX4927_IRQ_DPRINTK(TX4927_IRQ_CP0_ENABLE, "irq=%d \n", irq);
tx4927_irq_cp0_modify(CCP0_STATUS, 0, tx4927_irq_cp0_mask(irq));
}
static void tx4927_irq_cp0_disable(unsigned int irq)
{
TX4927_IRQ_DPRINTK(TX4927_IRQ_CP0_DISABLE, "irq=%d \n", irq);
tx4927_irq_cp0_modify(CCP0_STATUS, tx4927_irq_cp0_mask(irq), 0);
}
/*
* Functions for pic
*/
u32 tx4927_irq_pic_addr(int irq)
{
/* MVMCP -- need to formulize this */
irq -= TX4927_IRQ_PIC_BEG;
switch (irq) {
case 17:
case 16:
case 1:
case 0:
return (0xff1ff610);
case 19:
case 18:
case 3:
case 2:
return (0xff1ff614);
case 21:
case 20:
case 5:
case 4:
return (0xff1ff618);
case 23:
case 22:
case 7:
case 6:
return (0xff1ff61c);
case 25:
case 24:
case 9:
case 8:
return (0xff1ff620);
case 27:
case 26:
case 11:
case 10:
return (0xff1ff624);
case 29:
case 28:
case 13:
case 12:
return (0xff1ff628);
case 31:
case 30:
case 15:
case 14:
return (0xff1ff62c);
}
return (0);
}
u32 tx4927_irq_pic_mask(int irq)
{
/* MVMCP -- need to formulize this */
irq -= TX4927_IRQ_PIC_BEG;
switch (irq) {
case 31:
case 29:
case 27:
case 25:
case 23:
case 21:
case 19:
case 17:{
return (0x07000000);
}
case 30:
case 28:
case 26:
case 24:
case 22:
case 20:
case 18:
case 16:{
return (0x00070000);
}
case 15:
case 13:
case 11:
case 9:
case 7:
case 5:
case 3:
case 1:{
return (0x00000700);
}
case 14:
case 12:
case 10:
case 8:
case 6:
case 4:
case 2:
case 0:{
return (0x00000007);
}
}
return (0x00000000);
}
static void tx4927_irq_pic_modify(unsigned pic_reg, unsigned clr_bits,
unsigned set_bits)
{
unsigned long val = 0;
val = TX4927_RD(pic_reg);
val &= (~clr_bits);
val |= (set_bits);
TX4927_WR(pic_reg, val);
}
static void __init tx4927_irq_pic_init(void)
{
int i;
TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_INIT, "beg=%d end=%d\n",
TX4927_IRQ_PIC_BEG, TX4927_IRQ_PIC_END);
for (i = TX4927_IRQ_PIC_BEG; i <= TX4927_IRQ_PIC_END; i++)
set_irq_chip_and_handler(i, &tx4927_irq_pic_type,
handle_level_irq);
setup_irq(TX4927_IRQ_NEST_PIC_ON_CP0, &tx4927_irq_pic_action);
TX4927_WR(0xff1ff640, 0x6); /* irq level mask -- only accept hightest */
TX4927_WR(0xff1ff600, TX4927_RD(0xff1ff600) | 0x1); /* irq enable */
}
static void tx4927_irq_pic_enable(unsigned int irq)
{
TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_ENABLE, "irq=%d\n", irq);
tx4927_irq_pic_modify(tx4927_irq_pic_addr(irq), 0,
tx4927_irq_pic_mask(irq));
}
static void tx4927_irq_pic_disable(unsigned int irq)
{
TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_DISABLE, "irq=%d\n", irq);
tx4927_irq_pic_modify(tx4927_irq_pic_addr(irq),
tx4927_irq_pic_mask(irq), 0);
}
/*
* Main init functions
*/
void __init tx4927_irq_init(void)
{
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "-\n");
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_cp0_init()\n");
tx4927_irq_cp0_init();
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_pic_init()\n");
tx4927_irq_pic_init();
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "+\n");
}
static int tx4927_irq_nested(void)
{
int sw_irq = 0;
u32 level2;
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST1, "-\n");
level2 = TX4927_RD(0xff1ff6a0);
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST2, "=level2a=0x%x\n", level2);
if ((level2 & 0x10000) == 0) {
level2 &= 0x1f;
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST3, "=level2b=0x%x\n", level2);
sw_irq = TX4927_IRQ_PIC_BEG + level2;
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST3, "=sw_irq=%d\n", sw_irq);
if (sw_irq == 27) {
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST4, "=irq-%d\n",
sw_irq);
#ifdef CONFIG_TOSHIBA_RBTX4927
{
sw_irq = toshiba_rbtx4927_irq_nested(sw_irq);
}
#endif
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST4, "=irq+%d\n",
sw_irq);
}
}
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST2, "=sw_irq=%d\n", sw_irq);
TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST1, "+\n");
return (sw_irq);
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & STATUSF_IP7) /* cpu timer */
do_IRQ(TX4927_IRQ_CPU_TIMER);
else if (pending & STATUSF_IP2) { /* tx4927 pic */
unsigned int irq = tx4927_irq_nested();
if (unlikely(irq == 0)) {
spurious_interrupt();
return;
}
do_IRQ(irq);
} else if (pending & STATUSF_IP0) /* user line 0 */
do_IRQ(TX4927_IRQ_USER0);
else if (pending & STATUSF_IP1) /* user line 1 */
do_IRQ(TX4927_IRQ_USER1);
else
spurious_interrupt();
}
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