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authorPaul Mundt <lethal@linux-sh.org>2009-11-04 11:44:21 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-11-04 11:44:21 +0900
commita37c6c7aec38a693f87ee5ccc6e60a5b3ee700f2 (patch)
tree725a5fcc4627d7e1896a3646f26687f714dba31d /arch/sh/boards/mach-se
parent45b9deaf14e74543371aa8faea69c14e27b038c6 (diff)
sh: mach-se: Convert SE7722 FPGA to dynamic IRQ allocation.
This gets rid of the arbitrary set of vectors used by the SE7722 FPGA interrupt controller and witches 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>
Diffstat (limited to 'arch/sh/boards/mach-se')
-rw-r--r--arch/sh/boards/mach-se/7722/irq.c32
-rw-r--r--arch/sh/boards/mach-se/7722/setup.c15
2 files changed, 29 insertions, 18 deletions
diff --git a/arch/sh/boards/mach-se/7722/irq.c b/arch/sh/boards/mach-se/7722/irq.c
index 02d21a3e2a8..4eb31acfafe 100644
--- a/arch/sh/boards/mach-se/7722/irq.c
+++ b/arch/sh/boards/mach-se/7722/irq.c
@@ -16,15 +16,17 @@
#include <asm/io.h>
#include <mach-se/mach/se7722.h>
+unsigned int se7722_fpga_irq[SE7722_FPGA_IRQ_NR] = { 0, };
+
static void disable_se7722_irq(unsigned int irq)
{
- unsigned int bit = irq - SE7722_FPGA_IRQ_BASE;
+ unsigned int bit = (unsigned int)get_irq_chip_data(irq);
ctrl_outw(ctrl_inw(IRQ01_MASK) | 1 << bit, IRQ01_MASK);
}
static void enable_se7722_irq(unsigned int irq)
{
- unsigned int bit = irq - SE7722_FPGA_IRQ_BASE;
+ unsigned int bit = (unsigned int)get_irq_chip_data(irq);
ctrl_outw(ctrl_inw(IRQ01_MASK) & ~(1 << bit), IRQ01_MASK);
}
@@ -38,18 +40,15 @@ static struct irq_chip se7722_irq_chip __read_mostly = {
static void se7722_irq_demux(unsigned int irq, struct irq_desc *desc)
{
unsigned short intv = ctrl_inw(IRQ01_STS);
- struct irq_desc *ext_desc;
- unsigned int ext_irq = SE7722_FPGA_IRQ_BASE;
+ unsigned int ext_irq = 0;
intv &= (1 << SE7722_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(se7722_fpga_irq[ext_irq]);
}
}
@@ -63,11 +62,18 @@ void __init init_se7722_IRQ(void)
ctrl_outw(0, IRQ01_MASK); /* disable all irqs */
ctrl_outw(0x2000, 0xb03fffec); /* mrshpc irq enable */
- for (i = 0; i < SE7722_FPGA_IRQ_NR; i++)
- set_irq_chip_and_handler_name(SE7722_FPGA_IRQ_BASE + i,
+ for (i = 0; i < SE7722_FPGA_IRQ_NR; i++) {
+ se7722_fpga_irq[i] = create_irq();
+ if (se7722_fpga_irq[i] < 0)
+ return;
+
+ set_irq_chip_and_handler_name(se7722_fpga_irq[i],
&se7722_irq_chip,
handle_level_irq, "level");
+ set_irq_chip_data(se7722_fpga_irq[i], (void *)i);
+ }
+
set_irq_chained_handler(IRQ0_IRQ, se7722_irq_demux);
set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
diff --git a/arch/sh/boards/mach-se/7722/setup.c b/arch/sh/boards/mach-se/7722/setup.c
index 36374078e52..d05f34f6528 100644
--- a/arch/sh/boards/mach-se/7722/setup.c
+++ b/arch/sh/boards/mach-se/7722/setup.c
@@ -60,8 +60,7 @@ static struct resource smc91x_eth_resources[] = {
.flags = IORESOURCE_MEM,
},
[1] = {
- .start = SMC_IRQ,
- .end = SMC_IRQ,
+ /* Filled in later */
.flags = IORESOURCE_IRQ,
},
};
@@ -90,8 +89,7 @@ static struct resource cf_ide_resources[] = {
.flags = IORESOURCE_IO,
},
[2] = {
- .start = MRSHPC_IRQ0,
- .end = MRSHPC_IRQ0,
+ /* Filled in later */
.flags = IORESOURCE_IRQ,
},
};
@@ -153,6 +151,14 @@ static struct platform_device *se7722_devices[] __initdata = {
static int __init se7722_devices_setup(void)
{
mrshpc_setup_windows();
+
+ /* Wire-up dynamic vectors */
+ cf_ide_resources[2].start = cf_ide_resources[2].end =
+ se7722_fpga_irq[SE7722_FPGA_IRQ_MRSHPC0];
+
+ smc91x_eth_resources[1].start = smc91x_eth_resources[1].end =
+ se7722_fpga_irq[SE7722_FPGA_IRQ_SMC];
+
return platform_add_devices(se7722_devices, ARRAY_SIZE(se7722_devices));
}
device_initcall(se7722_devices_setup);
@@ -193,6 +199,5 @@ static void __init se7722_setup(char **cmdline_p)
static struct sh_machine_vector mv_se7722 __initmv = {
.mv_name = "Solution Engine 7722" ,
.mv_setup = se7722_setup ,
- .mv_nr_irqs = SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_NR,
.mv_init_irq = init_se7722_IRQ,
};