[MIPS] Alchemy: replace ffs() with __ffs()

[linux-2.6-omap-h63xx.git] / arch / mips / au1000 / pb1200 / irqmap.c

diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
index 2d49f32f46223a51196acd61c41fe2c60ef07a4f..8fcd0df86f93248e4e7a0fdf1eff33fd70647bae 100644 (file)
--- a/arch/mips/au1000/pb1200/irqmap.c
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -36,8 +36,8 @@
 #include <linux/slab.h>
 #include <linux/random.h>
 #include <linux/delay.h>
+#include <linux/bitops.h>
 
-#include <asm/bitops.h>
 #include <asm/bootinfo.h>
 #include <asm/io.h>
 #include <asm/mipsregs.h>
@@ -54,7 +54,7 @@
 #define PB1200_INT_END DB1200_INT_END
 #endif
 
-au1xxx_irq_map_t __initdata au1xxx_irq_map[] = {
+struct au1xxx_irqmap __initdata au1xxx_irq_map[] = {
        { AU1000_GPIO_7, INTC_INT_LOW_LEVEL, 0 }, // This is exteranl interrupt cascade
 };
 
@@ -65,7 +65,7 @@ int __initdata au1xxx_nr_irqs = ARRAY_SIZE(au1xxx_irq_map);
  */
 static volatile int pb1200_cascade_en=0;
 
-irqreturn_t pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t pb1200_cascade_handler( int irq, void *dev_id)
 {
        unsigned short bisr = bcsr->int_status;
        int extirq_nr = 0;
@@ -74,10 +74,11 @@ irqreturn_t pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
        bcsr->int_status = bisr;
        for( ; bisr; bisr &= (bisr-1) )
        {
-               extirq_nr = (PB1200_INT_BEGIN-1) + au_ffs(bisr);
+               extirq_nr = PB1200_INT_BEGIN + __ffs(bisr);
                /* Ack and dispatch IRQ */
-               do_IRQ(extirq_nr,regs);
+               do_IRQ(extirq_nr);
        }
+
        return IRQ_RETVAL(1);
 }
 
@@ -93,89 +94,89 @@ inline void pb1200_disable_irq(unsigned int irq_nr)
        bcsr->intclr = 1<<(irq_nr - PB1200_INT_BEGIN);
 }
 
-static unsigned int pb1200_startup_irq( unsigned int irq_nr )
+static unsigned int pb1200_setup_cascade(void)
 {
-       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);
+       int err;
+
+       err = request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
+                         0, "Pb1200 Cascade", &pb1200_cascade_handler);
+       if (err)
+               return err;
+
        return 0;
 }
 
-static void pb1200_shutdown_irq( unsigned int irq_nr )
+static unsigned int pb1200_startup_irq(unsigned int irq)
 {
-       pb1200_disable_irq(irq_nr);
-       if (--pb1200_cascade_en == 0)
-       {
-               free_irq(AU1000_GPIO_7,&pb1200_cascade_handler );
+       if (++pb1200_cascade_en == 1) {
+               int res;
+
+               res = pb1200_setup_cascade();
+               if (res)
+                       return res;
        }
-       return;
-}
 
-static inline void pb1200_mask_and_ack_irq(unsigned int irq_nr)
-{
-       pb1200_disable_irq( irq_nr );
+       pb1200_enable_irq(irq);
+
+       return 0;
 }
 
-static void pb1200_end_irq(unsigned int irq_nr)
+static void pb1200_shutdown_irq(unsigned int irq)
 {
-       if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
-               pb1200_enable_irq(irq_nr);
-       }
+       pb1200_disable_irq(irq);
+       if (--pb1200_cascade_en == 0)
+               free_irq(AU1000_GPIO_7, &pb1200_cascade_handler);
 }
 
-static struct hw_interrupt_type external_irq_type =
-{
+static struct irq_chip external_irq_type = {
 #ifdef CONFIG_MIPS_PB1200
-       "Pb1200 Ext",
+       .name = "Pb1200 Ext",
 #endif
 #ifdef CONFIG_MIPS_DB1200
-       "Db1200 Ext",
+       .name = "Db1200 Ext",
 #endif
-       pb1200_startup_irq,
-       pb1200_shutdown_irq,
-       pb1200_enable_irq,
-       pb1200_disable_irq,
-       pb1200_mask_and_ack_irq,
-       pb1200_end_irq,
-       NULL
+       .startup  = pb1200_startup_irq,
+       .shutdown = pb1200_shutdown_irq,
+       .ack      = pb1200_disable_irq,
+       .mask     = pb1200_disable_irq,
+       .mask_ack = pb1200_disable_irq,
+       .unmask   = pb1200_enable_irq,
 };
 
 void _board_init_irq(void)
 {
-       int irq_nr;
+       unsigned int irq;
 
-       for (irq_nr = PB1200_INT_BEGIN; irq_nr <= PB1200_INT_END; irq_nr++)
-       {
-               irq_desc[irq_nr].chip = &external_irq_type;
-               pb1200_disable_irq(irq_nr);
+#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");
+               panic("Game over.  Your score is 0.");
+       }
+#endif
+
+       for (irq = PB1200_INT_BEGIN; irq <= PB1200_INT_END; irq++) {
+               set_irq_chip_and_handler(irq, &external_irq_type,
+                                        handle_level_irq);
+               pb1200_disable_irq(irq);
        }
 
-       /* GPIO_7 can not be hooked here, so it is hooked upon first
-       request of any source attached to the cascade */
+       /*
+        * GPIO_7 can not be hooked here, so it is hooked upon first
+        * request of any source attached to the cascade
+        */
 }
-