/*
* BRIEF MODULE DESCRIPTION
* Au1xxx irq map table
*
* 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/interrupt.h>
#include <asm/mach-au1x00/au1000.h>
#ifdef CONFIG_MIPS_PB1200
#include <asm/mach-pb1x00/pb1200.h>
#endif
#ifdef CONFIG_MIPS_DB1200
#include <asm/mach-db1x00/db1200.h>
#define PB1200_INT_BEGIN DB1200_INT_BEGIN
#define PB1200_INT_END DB1200_INT_END
#endif
struct au1xxx_irqmap __initdata au1xxx_irq_map[] = {
/* This is external interrupt cascade */
{ AU1000_GPIO_7, IRQF_TRIGGER_LOW, 0 },
};
/*
* Support for External interrupts on the Pb1200 Development platform.
*/
static void pb1200_cascade_handler(unsigned int irq, struct irq_desc *d)
{
unsigned short bisr = bcsr->int_status;
for ( ; bisr; bisr &= bisr - 1)
generic_handle_irq(PB1200_INT_BEGIN + __ffs(bisr));
}
/* NOTE: both the enable and mask bits must be cleared, otherwise the
* CPLD generates tons of spurious interrupts (at least on the DB1200).
*/
static void pb1200_mask_irq(unsigned int irq_nr)
{
bcsr->intclr_mask = 1 << (irq_nr - PB1200_INT_BEGIN);
bcsr->intclr = 1 << (irq_nr - PB1200_INT_BEGIN);
au_sync();
}
static void pb1200_maskack_irq(unsigned int irq_nr)
{
bcsr->intclr_mask = 1 << (irq_nr - PB1200_INT_BEGIN);
bcsr->intclr = 1 << (irq_nr - PB1200_INT_BEGIN);
bcsr->int_status = 1 << (irq_nr - PB1200_INT_BEGIN); /* ack */
au_sync();
}
static void pb1200_unmask_irq(unsigned int irq_nr)
{
bcsr->intset = 1 << (irq_nr - PB1200_INT_BEGIN);
bcsr->intset_mask = 1 << (irq_nr - PB1200_INT_BEGIN);
au_sync();
}
static struct irq_chip pb1200_cpld_irq_type = {
#ifdef CONFIG_MIPS_PB1200
.name = "Pb1200 Ext",
#endif
#ifdef CONFIG_MIPS_DB1200
.name = "Db1200 Ext",
#endif
.mask = pb1200_mask_irq,
.mask_ack = pb1200_maskack_irq,
.unmask = pb1200_unmask_irq,
};
void __init board_init_irq(void)
{
unsigned int irq;
au1xxx_setup_irqmap(au1xxx_irq_map, ARRAY_SIZE(au1xxx_irq_map));
#ifdef CONFIG_MIPS_PB1200
/* We have a problem with CPLD rev 3. */
if (((bcsr->whoami & BCSR_WHOAMI_CPLD) >> 4) <= 3) {
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "Pb1200 must be at CPLD rev 4. Please have Pb1200\n");
printk(KERN_ERR "updated to latest revision. This software will\n");
printk(KERN_ERR "not work on anything less than CPLD rev 4.\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
printk(KERN_ERR "WARNING!!!\n");
panic("Game over. Your score is 0.");
}
#endif
/* mask & disable & ack all */
bcsr->intclr_mask = 0xffff;
bcsr->intclr = 0xffff;
bcsr->int_status = 0xffff;
au_sync();
for (irq = PB1200_INT_BEGIN; irq <= PB1200_INT_END; irq++)
set_irq_chip_and_handler_name(irq, &pb1200_cpld_irq_type,
handle_level_irq, "level");
set_irq_chained_handler(AU1000_GPIO_7, pb1200_cascade_handler);
}
