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sh: mach-se: Convert SE7722 FPGA to dynamic IRQ allocation.

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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>
This commit is contained in:
Paul Mundt 2009-11-04 11:44:21 +09:00
parent 45b9deaf14
commit a37c6c7aec
3 changed files with 31 additions and 27 deletions
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32
arch/sh/boards/mach-se/7722/irq.c
View File

@ -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);

15
arch/sh/boards/mach-se/7722/setup.c
View File

@ -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,
};

11
arch/sh/include/mach-se/mach/se7722.h
View File

@ -92,18 +92,11 @@
#define SE7722_FPGA_IRQ_MRSHPC1 3 /* IRQ1 */
#define SE7722_FPGA_IRQ_MRSHPC2 4 /* IRQ1 */
#define SE7722_FPGA_IRQ_MRSHPC3 5 /* IRQ1 */
#define SE7722_FPGA_IRQ_NR 6
#define SE7722_FPGA_IRQ_BASE 110
#define MRSHPC_IRQ3 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC3)
#define MRSHPC_IRQ2 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC2)
#define MRSHPC_IRQ1 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC1)
#define MRSHPC_IRQ0 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC0)
#define SMC_IRQ (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_SMC)
#define USB_IRQ (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_USB)
/* arch/sh/boards/se/7722/irq.c */
extern unsigned int se7722_fpga_irq[];
void init_se7722_IRQ(void);
#define __IO_PREFIX se7722