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sh: rework intc2 code

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The shared intc2 code currently contains cpu-specific #ifdefs.
This is a tad unclean and it prevents us from using the shared code
to drive board-specific irqs on the se7780 board.

This patch reworks the intc2 code by moving the base addresses of
the intc2 registers into struct intc2_desc. This new structure also
contains the name of the controller in struct irq_chip. The idea
behind putting struct irq_chip in there is that we can use offsetof()
to locate the base addresses in the irq_chip callbacks.

One logic change has been made - the original shared intc2 code
enabled the interrupts by default but with this patch they are all
disabled by default.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2007-06-15 10:41:54 +09:00 committed by Paul Mundt
parent d3efbdd6c5
commit d619500aed
7 changed files with 103 additions and 75 deletions
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45
arch/sh/boards/se/7780/irq.c
View file

@ -16,28 +16,6 @@
#include <asm/io.h>
#include <asm/se7780.h>
#define INTC_INTMSK0 0xFFD00044
#define INTC_INTMSKCLR0 0xFFD00064
static void disable_se7780_irq(unsigned int irq)
{
struct intc2_data *p = get_irq_chip_data(irq);
ctrl_outl(1 << p->msk_shift, INTC_INTMSK0 + p->msk_offset);
}
static void enable_se7780_irq(unsigned int irq)
{
struct intc2_data *p = get_irq_chip_data(irq);
ctrl_outl(1 << p->msk_shift, INTC_INTMSKCLR0 + p->msk_offset);
}
static struct irq_chip se7780_irq_chip __read_mostly = {
.name = "SE7780",
.mask = disable_se7780_irq,
.unmask = enable_se7780_irq,
.mask_ack = disable_se7780_irq,
};
static struct intc2_data intc2_irq_table[] = {
{ 2, 0, 31, 0, 31, 3 }, /* daughter board EXTINT1 */
{ 4, 0, 30, 0, 30, 3 }, /* daughter board EXTINT2 */
@ -51,13 +29,24 @@ static struct intc2_data intc2_irq_table[] = {
{ 0 , 0, 24, 0, 24, 3 }, /* SM501 */
};
static struct intc2_desc intc2_irq_desc __read_mostly = {
.prio_base = 0, /* N/A */
.msk_base = 0xffd00044,
.mskclr_base = 0xffd00064,
.intc2_data = intc2_irq_table,
.nr_irqs = ARRAY_SIZE(intc2_irq_table),
.chip = {
.name = "INTC2-se7780",
},
};
/*
* Initialize IRQ setting
*/
void __init init_se7780_IRQ(void)
{
int i ;
/* enable all interrupt at FPGA */
ctrl_outw(0, FPGA_INTMSK1);
/* mask SM501 interrupt */
@ -79,11 +68,5 @@ void __init init_se7780_IRQ(void)
/* FPGA + 0x0A */
ctrl_outw((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);
for (i = 0; i < ARRAY_SIZE(intc2_irq_table); i++) {
disable_irq_nosync(intc2_irq_table[i].irq);
set_irq_chip_and_handler_name( intc2_irq_table[i].irq, &se7780_irq_chip,
handle_level_irq, "level");
set_irq_chip_data( intc2_irq_table[i].irq, &intc2_irq_table[i] );
disable_se7780_irq(intc2_irq_table[i].irq);
}
register_intc2_controller(&intc2_irq_desc);
}

58
arch/sh/kernel/cpu/irq/intc2.c
View file

@ -14,36 +14,26 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#if defined(CONFIG_CPU_SUBTYPE_SH7760)
#define INTC2_BASE 0xfe080000
#define INTC2_INTMSK (INTC2_BASE + 0x40)
#define INTC2_INTMSKCLR (INTC2_BASE + 0x60)
#elif defined(CONFIG_CPU_SUBTYPE_SH7780) || \
defined(CONFIG_CPU_SUBTYPE_SH7785)
#define INTC2_BASE 0xffd40000
#define INTC2_INTMSK (INTC2_BASE + 0x38)
#define INTC2_INTMSKCLR (INTC2_BASE + 0x3c)
#endif
static inline struct intc2_desc *get_intc2_desc(unsigned int irq)
{
struct irq_chip *chip = get_irq_chip(irq);
return (void *)((char *)chip - offsetof(struct intc2_desc, chip));
}
static void disable_intc2_irq(unsigned int irq)
{
struct intc2_data *p = get_irq_chip_data(irq);
ctrl_outl(1 << p->msk_shift, INTC2_INTMSK + p->msk_offset);
struct intc2_desc *d = get_intc2_desc(irq);
ctrl_outl(1 << p->msk_shift, d->msk_base + p->msk_offset);
}
static void enable_intc2_irq(unsigned int irq)
{
struct intc2_data *p = get_irq_chip_data(irq);
ctrl_outl(1 << p->msk_shift, INTC2_INTMSKCLR + p->msk_offset);
struct intc2_desc *d = get_intc2_desc(irq);
ctrl_outl(1 << p->msk_shift, d->mskclr_base + p->msk_offset);
}
static struct irq_chip intc2_irq_chip = {
.name = "INTC2",
.mask = disable_intc2_irq,
.unmask = enable_intc2_irq,
.mask_ack = disable_intc2_irq,
};
/*
* Setup an INTC2 style interrupt.
* NOTE: Unlike IPR interrupts, parameters are not shifted by this code,
@ -56,30 +46,36 @@ static struct irq_chip intc2_irq_chip = {
*
* in the intc2_data table.
*/
void make_intc2_irq(struct intc2_data *table, unsigned int nr_irqs)
void register_intc2_controller(struct intc2_desc *desc)
{
int i;
for (i = 0; i < nr_irqs; i++) {
desc->chip.mask = disable_intc2_irq;
desc->chip.unmask = enable_intc2_irq;
desc->chip.mask_ack = disable_intc2_irq;
for (i = 0; i < desc->nr_irqs; i++) {
unsigned long ipr, flags;
struct intc2_data *p = table + i;
struct intc2_data *p = desc->intc2_data + i;
disable_irq_nosync(p->irq);
/* Set the priority level */
local_irq_save(flags);
if (desc->prio_base) {
/* Set the priority level */
local_irq_save(flags);
ipr = ctrl_inl(INTC2_BASE + p->ipr_offset);
ipr &= ~(0xf << p->ipr_shift);
ipr |= p->priority << p->ipr_shift;
ctrl_outl(ipr, INTC2_BASE + p->ipr_offset);
ipr = ctrl_inl(desc->prio_base + p->ipr_offset);
ipr &= ~(0xf << p->ipr_shift);
ipr |= p->priority << p->ipr_shift;
ctrl_outl(ipr, desc->prio_base + p->ipr_offset);
local_irq_restore(flags);
local_irq_restore(flags);
}
set_irq_chip_and_handler_name(p->irq, &intc2_irq_chip,
set_irq_chip_and_handler_name(p->irq, &desc->chip,
handle_level_irq, "level");
set_irq_chip_data(p->irq, p);
enable_intc2_irq(p->irq);
disable_intc2_irq(p->irq);
}
}

15
arch/sh/kernel/cpu/sh4/setup-sh7760.c
View file

@ -96,6 +96,19 @@ static struct intc2_data intc2_irq_table[] = {
{109,12, 0, 4, 0, 3}, /* CMTI */
};
static struct intc2_desc intc2_irq_desc __read_mostly = {
.prio_base = 0xfe080000,
.msk_base = 0xfe080040,
.mskclr_base = 0xfe080060,
.intc2_data = intc2_irq_table,
.nr_irqs = ARRAY_SIZE(intc2_irq_table),
.chip = {
.name = "INTC2-sh7760",
},
};
static struct ipr_data sh7760_ipr_map[] = {
/* IRQ, IPR-idx, shift, priority */
{ 16, 0, 12, 2 }, /* TMU0 TUNI*/
@ -143,7 +156,7 @@ unsigned int map_ipridx_to_addr(int idx)
void __init init_IRQ_intc2(void)
{
make_intc2_irq(intc2_irq_table, ARRAY_SIZE(intc2_irq_table));
register_intc2_controller(&intc2_irq_desc);
}
void __init init_IRQ_ipr(void)

15
arch/sh/kernel/cpu/sh4a/setup-sh7780.c
View file

@ -102,7 +102,20 @@ static struct intc2_data intc2_irq_table[] = {
{ 68, 0x14, 8, 0, 18, 2 }, /* PCIC4 */
};
static struct intc2_desc intc2_irq_desc __read_mostly = {
.prio_base = 0xffd40000,
.msk_base = 0xffd40038,
.mskclr_base = 0xffd4003c,
.intc2_data = intc2_irq_table,
.nr_irqs = ARRAY_SIZE(intc2_irq_table),
.chip = {
.name = "INTC2-sh7780",
},
};
void __init init_IRQ_intc2(void)
{
make_intc2_irq(intc2_irq_table, ARRAY_SIZE(intc2_irq_table));
register_intc2_controller(&intc2_irq_desc);
}

16
arch/sh/kernel/cpu/sh4a/setup-sh7785.c
View file

@ -97,7 +97,21 @@ static struct intc2_data intc2_irq_table[] = {
{ 60, 12, 16, 0, 7, 3 }, /* SCIF5 ERI, RXI, BRI, TXI */
};
static struct intc2_desc intc2_irq_desc __read_mostly = {
.prio_base = 0xffd40000,
.msk_base = 0xffd40038,
.mskclr_base = 0xffd4003c,
.intc2_data = intc2_irq_table,
.nr_irqs = ARRAY_SIZE(intc2_irq_table),
.chip = {
.name = "INTC2-sh7785",
},
};
void __init init_IRQ_intc2(void)
{
make_intc2_irq(intc2_irq_table, ARRAY_SIZE(intc2_irq_table));
register_intc2_controller(&intc2_irq_desc);
}

19
include/asm-sh/hw_irq.h
View file

@ -5,4 +5,23 @@
extern atomic_t irq_err_count;
struct intc2_data {
unsigned short irq;
unsigned char ipr_offset, ipr_shift;
unsigned char msk_offset, msk_shift;
unsigned char priority;
};
struct intc2_desc {
unsigned long prio_base;
unsigned long msk_base;
unsigned long mskclr_base;
struct intc2_data *intc2_data;
unsigned int nr_irqs;
struct irq_chip chip;
};
void register_intc2_controller(struct intc2_desc *);
void init_IRQ_intc2(void);
#endif /* __ASM_SH_HW_IRQ_H */

10
include/asm-sh/irq.h
View file

@ -63,16 +63,6 @@ void make_ipr_irq(struct ipr_data *table, unsigned int nr_irqs);
void make_imask_irq(unsigned int irq);
void init_IRQ_ipr(void);
struct intc2_data {
unsigned short irq;
unsigned char ipr_offset, ipr_shift;
unsigned char msk_offset, msk_shift;
unsigned char priority;
};
void make_intc2_irq(struct intc2_data *, unsigned int nr_irqs);
void init_IRQ_intc2(void);
static inline int generic_irq_demux(int irq)
{
return irq;