sh: Convert IPR-IRQ to IRQ chip.

One more initial conversion..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 27 insertions, 75 deletions

diff --git a/arch/sh/kernel/cpu/irq/ipr.c b/arch/sh/kernel/cpu/irq/ipr.c
index f785822cd5de..8944abdf6e1c 100644
--- a/arch/sh/kernel/cpu/irq/ipr.c
+++ b/arch/sh/kernel/cpu/irq/ipr.c
@@ -1,11 +1,10 @@
 /*
- * arch/sh/kernel/cpu/irq/ipr.c
+ * Interrupt handling for IPR-based IRQ.
  *
  * Copyright (C) 1999  Niibe Yutaka & Takeshi Yaegashi
  * Copyright (C) 2000  Kazumoto Kojima
- * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
- *
- * Interrupt handling for IPR-based IRQ.
+ * Copyright (C) 2003  Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
+ * Copyright (C) 2006  Paul Mundt
  *
  * Supported system:
  *      On-chip supporting modules (TMU, RTC, etc.).
@@ -13,12 +12,13 @@
  *      Hitachi SolutionEngine external I/O:
  *              MS7709SE01, MS7709ASE01, and MS7750SE01
  *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  */
-
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/module.h>
-
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/machvec.h>
@@ -28,93 +28,45 @@ struct ipr_data {
         int shift;              /* Shifts of the 16-bit data */
         int priority;           /* The priority */
 };
-static struct ipr_data ipr_data[NR_IRQS];
-
-static void enable_ipr_irq(unsigned int irq);
-static void disable_ipr_irq(unsigned int irq);
-
-/* shutdown is same as "disable" */
-#define shutdown_ipr_irq disable_ipr_irq
-
-static void mask_and_ack_ipr(unsigned int);
-static void end_ipr_irq(unsigned int irq);
-
-static unsigned int startup_ipr_irq(unsigned int irq)
-{
-        enable_ipr_irq(irq);
-        return 0; /* never anything pending */
-}
-
-static struct hw_interrupt_type ipr_irq_type = {
-        .typename = "IPR-IRQ",
-        .startup = startup_ipr_irq,
-        .shutdown = shutdown_ipr_irq,
-        .enable = enable_ipr_irq,
-        .disable = disable_ipr_irq,
-        .ack = mask_and_ack_ipr,
-        .end = end_ipr_irq
-};
 
 static void disable_ipr_irq(unsigned int irq)
 {
-        unsigned long val;
-        unsigned int addr = ipr_data[irq].addr;
-        unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
-
+        struct ipr_data *p = get_irq_chip_data(irq);
         /* Set the priority in IPR to 0 */
-        val = ctrl_inw(addr);
-        val &= mask;
-        ctrl_outw(val, addr);
+        ctrl_outw(ctrl_inw(p->addr) & (0xffff ^ (0xf << p->shift)), p->addr);
 }
 
 static void enable_ipr_irq(unsigned int irq)
 {
-        unsigned long val;
-        unsigned int addr = ipr_data[irq].addr;
-        int priority = ipr_data[irq].priority;
-        unsigned short value = (priority << ipr_data[irq].shift);
-
+        struct ipr_data *p = get_irq_chip_data(irq);
         /* Set priority in IPR back to original value */
-        val = ctrl_inw(addr);
-        val |= value;
-        ctrl_outw(val, addr);
+        ctrl_outw(ctrl_inw(p->addr) | (p->priority << p->shift), p->addr);
 }
 
-static void mask_and_ack_ipr(unsigned int irq)
-{
-        disable_ipr_irq(irq);
-
-#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7706) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
-        /* This is needed when we use edge triggered setting */
-        /* XXX: Is it really needed? */
-        if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
-                /* Clear external interrupt request */
-                int a = ctrl_inb(INTC_IRR0);
-                a &= ~(1 << (irq - IRQ0_IRQ));
-                ctrl_outb(a, INTC_IRR0);
-        }
-#endif
-}
-
-static void end_ipr_irq(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-                enable_ipr_irq(irq);
-}
+static struct irq_chip ipr_irq_chip = {
+        .name           = "ipr",
+        .mask           = disable_ipr_irq,
+        .unmask         = enable_ipr_irq,
+        .mask_ack       = disable_ipr_irq,
+};
 
 void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
 {
+        struct ipr_data ipr_data;
+
         disable_irq_nosync(irq);
-        ipr_data[irq].addr = addr;
-        ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
-        ipr_data[irq].priority = priority;
 
-        irq_desc[irq].chip = &ipr_irq_type;
-        disable_ipr_irq(irq);
+        ipr_data.addr = addr;
+        ipr_data.shift = pos*4; /* POSition (0-3) x 4 means shift */
+        ipr_data.priority = priority;
+
+        set_irq_chip_and_handler(irq, &ipr_irq_chip, handle_level_irq);
+        set_irq_chip_data(irq, &ipr_data);
+
+        enable_ipr_irq(irq);
 }
 
+/* XXX: This needs to die a horrible death.. */
 void __init init_IRQ(void)
 {
 #ifndef CONFIG_CPU_SUBTYPE_SH7780