--- /dev/null
+/*
+ * 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/config.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/irq.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/delay.h>
+
+#include <asm/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/system.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
+
+au1xxx_irq_map_t au1xxx_irq_map[] = {
+ { AU1000_GPIO_7, INTC_INT_LOW_LEVEL, 0 }, // This is exteranl interrupt cascade
+};
+
+int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
+
+/*
+ * Support for External interrupts on the PbAu1200 Development platform.
+ */
+static volatile int pb1200_cascade_en=0;
+
+irqreturn_t pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
+{
+ unsigned short bisr = bcsr->int_status;
+ int extirq_nr = 0;
+
+ /* Clear all the edge interrupts. This has no effect on level */
+ bcsr->int_status = bisr;
+ for( ; bisr; bisr &= (bisr-1) )
+ {
+ extirq_nr = (PB1200_INT_BEGIN-1) + au_ffs(bisr);
+ /* Ack and dispatch IRQ */
+ do_IRQ(extirq_nr,regs);
+ }
+ return IRQ_RETVAL(1);
+}
+
+inline void pb1200_enable_irq(unsigned int irq_nr)
+{
+ bcsr->intset_mask = 1<<(irq_nr - PB1200_INT_BEGIN);
+ bcsr->intset = 1<<(irq_nr - PB1200_INT_BEGIN);
+}
+
+inline void pb1200_disable_irq(unsigned int irq_nr)
+{
+ bcsr->intclr_mask = 1<<(irq_nr - PB1200_INT_BEGIN);
+ bcsr->intclr = 1<<(irq_nr - PB1200_INT_BEGIN);
+}
+
+static unsigned int pb1200_startup_irq( unsigned int irq_nr )
+{
+ if (++pb1200_cascade_en == 1)
+ {
+ request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
+ 0, "Pb1200 Cascade", (void *)&pb1200_cascade_handler );
+#ifdef CONFIG_MIPS_PB1200
+ /* We have a problem with CPLD rev3. Enable a workaround */
+ if( ((bcsr->whoami & BCSR_WHOAMI_CPLD)>>4) <= 3)
+ {
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("Pb1200 must be at CPLD rev4. Please have Pb1200\n");
+ printk("updated to latest revision. This software will not\n");
+ printk("work on anything less than CPLD rev4\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ printk("\nWARNING!!!\n");
+ while(1);
+ }
+#endif
+ }
+ pb1200_enable_irq(irq_nr);
+ return 0;
+}
+
+static void pb1200_shutdown_irq( unsigned int irq_nr )
+{
+ pb1200_disable_irq(irq_nr);
+ if (--pb1200_cascade_en == 0)
+ {
+ free_irq(AU1000_GPIO_7,&pb1200_cascade_handler );
+ }
+ return;
+}
+
+static inline void pb1200_mask_and_ack_irq(unsigned int irq_nr)
+{
+ pb1200_disable_irq( irq_nr );
+}
+
+static void pb1200_end_irq(unsigned int irq_nr)
+{
+ if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
+ pb1200_enable_irq(irq_nr);
+ }
+}
+
+static struct hw_interrupt_type external_irq_type =
+{
+#ifdef CONFIG_MIPS_PB1200
+ "Pb1200 Ext",
+#endif
+#ifdef CONFIG_MIPS_DB1200
+ "Db1200 Ext",
+#endif
+ pb1200_startup_irq,
+ pb1200_shutdown_irq,
+ pb1200_enable_irq,
+ pb1200_disable_irq,
+ pb1200_mask_and_ack_irq,
+ pb1200_end_irq,
+ NULL
+};
+
+void _board_init_irq(void)
+{
+ int irq_nr;
+
+ for (irq_nr = PB1200_INT_BEGIN; irq_nr <= PB1200_INT_END; irq_nr++)
+ {
+ irq_desc[irq_nr].handler = &external_irq_type;
+ pb1200_disable_irq(irq_nr);
+ }
+
+ /* GPIO_7 can not be hooked here, so it is hooked upon first
+ request of any source attached to the cascade */
+}
+
git://git.onelab.eu / linux-2.6.git / blobdiff