sh: mach-se: Convert SE7343 FPGA to dynamic IRQ allocation.

This gets rid of the arbitrary set of vectors used by the SE7722 FPGA
interrupt controller and switches over to a completely dynamic set.
No assumptions regarding a contiguous range are made, and the platform
resources themselves need to be filled in lazily.

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

2 files changed, 31 insertions, 20 deletions

diff --git a/arch/sh/boards/mach-se/7343/irq.c b/arch/sh/boards/mach-se/7343/irq.c
index 051c29d..c60fd13 100644
--- a/arch/sh/boards/mach-se/7343/irq.c
+++ b/arch/sh/boards/mach-se/7343/irq.c
@@ -16,15 +16,17 @@
 #include <linux/io.h>
 #include <mach-se/mach/se7343.h>
 
+unsigned int se7343_fpga_irq[SE7343_FPGA_IRQ_NR] = { 0, };
+
 static void disable_se7343_irq(unsigned int irq)
 {
-	unsigned int bit = irq - SE7343_FPGA_IRQ_BASE;
+	unsigned int bit = (unsigned int)get_irq_chip_data(irq);
 	ctrl_outw(ctrl_inw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK);
 }
 
 static void enable_se7343_irq(unsigned int irq)
 {
-	unsigned int bit = irq - SE7343_FPGA_IRQ_BASE;
+	unsigned int bit = (unsigned int)get_irq_chip_data(irq);
 	ctrl_outw(ctrl_inw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK);
 }
 
@@ -38,18 +40,15 @@ static struct irq_chip se7343_irq_chip __read_mostly = {
 static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
 {
 	unsigned short intv = ctrl_inw(PA_CPLD_ST);
-	struct irq_desc *ext_desc;
-	unsigned int ext_irq = SE7343_FPGA_IRQ_BASE;
+	unsigned int ext_irq = 0;
 
 	intv &= (1 << SE7343_FPGA_IRQ_NR) - 1;
 
-	while (intv) {
-		if (intv & 1) {
-			ext_desc = irq_desc + ext_irq;
-			handle_level_irq(ext_irq, ext_desc);
-		}
-		intv >>= 1;
-		ext_irq++;
+	for (; intv; intv >>= 1, ext_irq++) {
+		if (!(intv & 1))
+			continue;
+
+		generic_handle_irq(se7343_fpga_irq[ext_irq]);
 	}
 }
 
@@ -58,16 +57,24 @@ static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
  */
 void __init init_7343se_IRQ(void)
 {
-	int i;
+	int i, irq;
 
 	ctrl_outw(0, PA_CPLD_IMSK);	/* disable all irqs */
 	ctrl_outw(0x2000, 0xb03fffec);	/* mrshpc irq enable */
 
-	for (i = 0; i < SE7343_FPGA_IRQ_NR; i++)
-		set_irq_chip_and_handler_name(SE7343_FPGA_IRQ_BASE + i,
+	for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) {
+		irq = create_irq();
+		if (irq < 0)
+			return;
+		se7343_fpga_irq[i] = irq;
+
+		set_irq_chip_and_handler_name(se7343_fpga_irq[i],
 					      &se7343_irq_chip,
 					      handle_level_irq, "level");
 
+		set_irq_chip_data(se7343_fpga_irq[i], (void *)i);
+	}
+
 	set_irq_chained_handler(IRQ0_IRQ, se7343_irq_demux);
 	set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
 	set_irq_chained_handler(IRQ1_IRQ, se7343_irq_demux);
diff --git a/arch/sh/boards/mach-se/7343/setup.c b/arch/sh/boards/mach-se/7343/setup.c
index 4de56f3..292cc47 100644
--- a/arch/sh/boards/mach-se/7343/setup.c
+++ b/arch/sh/boards/mach-se/7343/setup.c
@@ -82,7 +82,6 @@ static struct plat_serial8250_port serial_platform_data[] = {
 		.mapbase	= 0x16000000,
 		.regshift	= 1,
 		.flags		= ST16C2550C_FLAGS,
-		.irq		= UARTA_IRQ,
 		.uartclk	= 7372800,
 	},
 	[1] = {
@@ -90,7 +89,6 @@ static struct plat_serial8250_port serial_platform_data[] = {
 		.mapbase	= 0x17000000,
 		.regshift	= 1,
 		.flags		= ST16C2550C_FLAGS,
-		.irq		= UARTB_IRQ,
 		.uartclk	= 7372800,
 	},
 	{ },
@@ -121,7 +119,7 @@ static struct resource usb_resources[] = {
 		.flags  = IORESOURCE_MEM,
 	},
 	[2] = {
-		.start  = USB_IRQ,
+		/* Filled in later */
 		.flags  = IORESOURCE_IRQ,
 	},
 };
@@ -138,8 +136,8 @@ static struct isp116x_platform_data usb_platform_data = {
 static struct platform_device usb_device = {
 	.name			= "isp116x-hcd",
 	.id			= -1,
-	.num_resources  	= ARRAY_SIZE(usb_resources),
-	.resource       	= usb_resources,
+	.num_resources		= ARRAY_SIZE(usb_resources),
+	.resource		= usb_resources,
 	.dev			= {
 		.platform_data	= &usb_platform_data,
 	},
@@ -155,6 +153,13 @@ static struct platform_device *sh7343se_platform_devices[] __initdata = {
 
 static int __init sh7343se_devices_setup(void)
 {
+	/* Wire-up dynamic vectors */
+	serial_platform_data[0].irq = se7343_fpga_irq[SE7343_FPGA_IRQ_UARTA];
+	serial_platform_data[1].irq = se7343_fpga_irq[SE7343_FPGA_IRQ_UARTB];
+
+	usb_resources[2].start = usb_resources[2].end =
+		se7343_fpga_irq[SE7343_FPGA_IRQ_USB];
+
 	return platform_add_devices(sh7343se_platform_devices,
 				    ARRAY_SIZE(sh7343se_platform_devices));
 }
@@ -179,6 +184,5 @@ static void __init sh7343se_setup(char **cmdline_p)
 static struct sh_machine_vector mv_7343se __initmv = {
 	.mv_name = "SolutionEngine 7343",
 	.mv_setup = sh7343se_setup,
-	.mv_nr_irqs = SE7343_FPGA_IRQ_BASE + SE7343_FPGA_IRQ_NR,
 	.mv_init_irq = init_7343se_IRQ,
 };