sh: Solution Engine 770x IPR irq setup.

Fixups for external IPR IRQs for the SE770x FPGA.

Signed-off-by: Nobuhiro Iwamatsu <hemamu@t-base.ne.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 74 insertions, 34 deletions

diff --git a/arch/sh/boards/se/770x/irq.c b/arch/sh/boards/se/770x/irq.c
index fcd7cd7fa05..307ca5da623 100644
--- a/arch/sh/boards/se/770x/irq.c
+++ b/arch/sh/boards/se/770x/irq.c
@@ -2,56 +2,96 @@
  * linux/arch/sh/boards/se/770x/irq.c
  *
  * Copyright (C) 2000  Kazumoto Kojima
+ * Copyright (C) 2006  Nobuhiro Iwamatsu
  *
  * Hitachi SolutionEngine Support.
  *
  */
 
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <asm/irq.h>
 #include <asm/io.h>
 #include <asm/se.h>
 
+/* 
+ * If the problem of make_ipr_irq is solved, 
+ * this code will become unnecessary. :-) 
+ */
+static void se770x_disable_ipr_irq(unsigned int irq)
+{
+	struct ipr_data *p = get_irq_chip_data(irq);
+
+	ctrl_outw(ctrl_inw(p->addr) & (0xffff ^ (0xf << p->shift)), p->addr);
+}
+
+static void se770x_enable_ipr_irq(unsigned int irq)
+{
+	struct ipr_data *p = get_irq_chip_data(irq);
+
+	ctrl_outw(ctrl_inw(p->addr) | (p->priority << p->shift), p->addr);
+}
+
+static struct irq_chip se770x_irq_chip = {
+	.name           = "MS770xSE-FPGA",
+	.mask           = se770x_disable_ipr_irq,
+	.unmask         = se770x_enable_ipr_irq,
+	.mask_ack       = se770x_disable_ipr_irq,
+};
+
+void make_se770x_irq(struct ipr_data *table, unsigned int nr_irqs)
+{
+	int i;
+
+	for (i = 0; i < nr_irqs; i++) {
+		unsigned int irq = table[i].irq;
+		disable_irq_nosync(irq);
+		set_irq_chip_and_handler_name(irq, &se770x_irq_chip,
+			handle_level_irq, "level");
+		set_irq_chip_data(irq, &table[i]);
+		se770x_enable_ipr_irq(irq);
+	}
+}
+
 static struct ipr_data se770x_ipr_map[] = {
 #if defined(CONFIG_CPU_SUBTYPE_SH7705)
 	/* This is default value */
-	{ 0xf-0x2, BCR_ILCRA, 2, 0x2 },
-	{ 0xf-0xa, BCR_ILCRA, 1, 0xa },
-	{ 0xf-0x5, BCR_ILCRB, 0, 0x5 },
-	{ 0xf-0x8, BCR_ILCRC, 1, 0x8 },
-	{ 0xf-0xc, BCR_ILCRC, 0, 0xc },
-	{ 0xf-0xe, BCR_ILCRD, 3, 0xe },
-	{ 0xf-0x3, BCR_ILCRD, 1, 0x3 }, /* LAN */
-	{ 0xf-0xd, BCR_ILCRE, 2, 0xd },
-	{ 0xf-0x9, BCR_ILCRE, 1, 0x9 },
-	{ 0xf-0x1, BCR_ILCRE, 0, 0x1 },
-	{ 0xf-0xf, BCR_ILCRF, 3, 0xf },
-	{ 0xf-0xb, BCR_ILCRF, 1, 0xb },
-	{ 0xf-0x7, BCR_ILCRG, 3, 0x7 },
-	{ 0xf-0x6, BCR_ILCRG, 2, 0x6 },
-	{ 0xf-0x4, BCR_ILCRG, 1, 0x4 },
+	{ 0xf-0x2, 0, 8,  0x2 , BCR_ILCRA},
+	{ 0xf-0xa, 0, 4,  0xa , BCR_ILCRA},
+	{ 0xf-0x5, 0, 0,  0x5 , BCR_ILCRB},
+	{ 0xf-0x8, 0, 4,  0x8 , BCR_ILCRC},
+	{ 0xf-0xc, 0, 0,  0xc , BCR_ILCRC},
+	{ 0xf-0xe, 0, 12, 0xe , BCR_ILCRD},
+	{ 0xf-0x3, 0, 4,  0x3 , BCR_ILCRD}, /* LAN */
+	{ 0xf-0xd, 0, 8,  0xd , BCR_ILCRE},
+	{ 0xf-0x9, 0, 4,  0x9 , BCR_ILCRE},
+	{ 0xf-0x1, 0, 0,  0x1 , BCR_ILCRE},
+	{ 0xf-0xf, 0, 12, 0xf , BCR_ILCRF},
+	{ 0xf-0xb, 0, 4,  0xb , BCR_ILCRF},
+	{ 0xf-0x7, 0, 12, 0x7 , BCR_ILCRG},
+	{ 0xf-0x6, 0, 8,  0x6 , BCR_ILCRG},
+	{ 0xf-0x4, 0, 4,  0x4 , BCR_ILCRG},
 #else
-	{ 14, BCR_ILCRA, 2, 0x0f-14 },
-	{ 12, BCR_ILCRA, 1, 0x0f-12 },
-	{  8, BCR_ILCRB, 1, 0x0f- 8 },
-	{  6, BCR_ILCRC, 3, 0x0f- 6 },
-	{  5, BCR_ILCRC, 2, 0x0f- 5 },
-	{  4, BCR_ILCRC, 1, 0x0f- 4 },
-	{  3, BCR_ILCRC, 0, 0x0f- 3 },
-	{  1, BCR_ILCRD, 3, 0x0f- 1 },
-
-	{ 10, BCR_ILCRD, 1, 0x0f-10 }, /* LAN */
-
-	{  0, BCR_ILCRE, 3, 0x0f- 0 }, /* PCIRQ3 */
-	{ 11, BCR_ILCRE, 2, 0x0f-11 }, /* PCIRQ2 */
-	{  9, BCR_ILCRE, 1, 0x0f- 9 }, /* PCIRQ1 */
-	{  7, BCR_ILCRE, 0, 0x0f- 7 }, /* PCIRQ0 */
-
+	{ 14, 0,  8, 0x0f-14 ,BCR_ILCRA},
+	{ 12, 0,  4, 0x0f-12 ,BCR_ILCRA},
+	{  8, 0,  4, 0x0f- 8 ,BCR_ILCRB},
+	{  6, 0, 12, 0x0f- 6 ,BCR_ILCRC},
+	{  5, 0,  8, 0x0f- 5 ,BCR_ILCRC},
+	{  4, 0,  4, 0x0f- 4 ,BCR_ILCRC},
+	{  3, 0,  0, 0x0f- 3 ,BCR_ILCRC},
+	{  1, 0, 12, 0x0f- 1 ,BCR_ILCRD},
+	/* ST NIC */
+	{ 10, 0,  4, 0x0f-10 ,BCR_ILCRD}, 	/* LAN */
+	/* MRSHPC IRQs setting */
+	{  0, 0, 12, 0x0f- 0 ,BCR_ILCRE},	/* PCIRQ3 */
+	{ 11, 0,  8, 0x0f-11 ,BCR_ILCRE}, 	/* PCIRQ2 */
+	{  9, 0,  4, 0x0f- 9 ,BCR_ILCRE}, 	/* PCIRQ1 */
+	{  7, 0,  0, 0x0f- 7 ,BCR_ILCRE}, 	/* PCIRQ0 */
 	/* #2, #13 are allocated for SLOT IRQ #1 and #2 (for now) */
 	/* NOTE: #2 and #13 are not used on PC */
-	{ 13, BCR_ILCRG, 1, 0x0f-13 }, /* SLOTIRQ2 */
-	{  2, BCR_ILCRG, 0, 0x0f- 2 }, /* SLOTIRQ1 */
+	{ 13, 0,  4, 0x0f-13 ,BCR_ILCRG}, 	/* SLOTIRQ2 */
+	{  2, 0,  0, 0x0f- 2 ,BCR_ILCRG}, 	/* SLOTIRQ1 */
 #endif
 };
 
@@ -81,5 +121,5 @@ void __init init_se_IRQ(void)
 	ctrl_outw(0, BCR_ILCRF);
 	ctrl_outw(0, BCR_ILCRG);
 #endif
-	make_ipr_irq(se770x_ipr_map, ARRAY_SIZE(se770x_ipr_map));
+	make_se770x_irq(se770x_ipr_map, ARRAY_SIZE(se770x_ipr_map));
 }