Merge ../linux-2.6 by hand

1 files changed, 182 insertions, 0 deletions

diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
new file mode 100644
index 000000000000..59e70e5cf325
--- /dev/null
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -0,0 +1,182 @@
+/*
+ * 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 */
+}
+