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sh: extend INTC with force_enable

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Extend the shared INTC code with force_enable support to
allow keeping mask bits statically enabled. Needed by
upcoming INTC SDHI patches that mux together a bunch of
vectors to a single linux interrupt which is masked by
a priority register, but needs individual mask bits
constantly enabled.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2010-02-09 04:29:22 +00:00 committed by Paul Mundt
parent 577cd7584c
commit d519095344
2 changed files with 133 additions and 19 deletions
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151
drivers/sh/intc.c
View File

@ -259,6 +259,43 @@ static void intc_disable(unsigned int irq)
}
}
static void (*intc_enable_noprio_fns[])(unsigned long addr,
unsigned long handle,
void (*fn)(unsigned long,
unsigned long,
unsigned long),
unsigned int irq) = {
[MODE_ENABLE_REG] = intc_mode_field,
[MODE_MASK_REG] = intc_mode_zero,
[MODE_DUAL_REG] = intc_mode_field,
[MODE_PRIO_REG] = intc_mode_field,
[MODE_PCLR_REG] = intc_mode_field,
};
static void intc_enable_disable(struct intc_desc_int *d,
unsigned long handle, int do_enable)
{
unsigned long addr;
unsigned int cpu;
void (*fn)(unsigned long, unsigned long,
void (*)(unsigned long, unsigned long, unsigned long),
unsigned int);
if (do_enable) {
for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
fn = intc_enable_noprio_fns[_INTC_MODE(handle)];
fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
}
} else {
for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
fn = intc_disable_fns[_INTC_MODE(handle)];
fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
}
}
}
static int intc_set_wake(unsigned int irq, unsigned int on)
{
return 0; /* allow wakeup, but setup hardware in intc_suspend() */
@ -417,19 +454,21 @@ static intc_enum __init intc_grp_id(struct intc_desc *desc,
return 0;
}
static unsigned int __init intc_mask_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps)
static unsigned int __init _intc_mask_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id,
unsigned int *reg_idx,
unsigned int *fld_idx)
{
struct intc_mask_reg *mr = desc->hw.mask_regs;
unsigned int i, j, fn, mode;
unsigned int fn, mode;
unsigned long reg_e, reg_d;
for (i = 0; mr && enum_id && i < desc->hw.nr_mask_regs; i++) {
mr = desc->hw.mask_regs + i;
while (mr && enum_id && *reg_idx < desc->hw.nr_mask_regs) {
mr = desc->hw.mask_regs + *reg_idx;
for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
if (mr->enum_ids[j] != enum_id)
for (; *fld_idx < ARRAY_SIZE(mr->enum_ids); (*fld_idx)++) {
if (mr->enum_ids[*fld_idx] != enum_id)
continue;
if (mr->set_reg && mr->clr_reg) {
@ -455,29 +494,49 @@ static unsigned int __init intc_mask_data(struct intc_desc *desc,
intc_get_reg(d, reg_e),
intc_get_reg(d, reg_d),
1,
(mr->reg_width - 1) - j);
(mr->reg_width - 1) - *fld_idx);
}
*fld_idx = 0;
(*reg_idx)++;
}
return 0;
}
static unsigned int __init intc_mask_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps)
{
unsigned int i = 0;
unsigned int j = 0;
unsigned int ret;
ret = _intc_mask_data(desc, d, enum_id, &i, &j);
if (ret)
return ret;
if (do_grps)
return intc_mask_data(desc, d, intc_grp_id(desc, enum_id), 0);
return 0;
}
static unsigned int __init intc_prio_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps)
static unsigned int __init _intc_prio_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id,
unsigned int *reg_idx,
unsigned int *fld_idx)
{
struct intc_prio_reg *pr = desc->hw.prio_regs;
unsigned int i, j, fn, mode, bit;
unsigned int fn, n, mode, bit;
unsigned long reg_e, reg_d;
for (i = 0; pr && enum_id && i < desc->hw.nr_prio_regs; i++) {
pr = desc->hw.prio_regs + i;
while (pr && enum_id && *reg_idx < desc->hw.nr_prio_regs) {
pr = desc->hw.prio_regs + *reg_idx;
for (j = 0; j < ARRAY_SIZE(pr->enum_ids); j++) {
if (pr->enum_ids[j] != enum_id)
for (; *fld_idx < ARRAY_SIZE(pr->enum_ids); (*fld_idx)++) {
if (pr->enum_ids[*fld_idx] != enum_id)
continue;
if (pr->set_reg && pr->clr_reg) {
@ -495,24 +554,69 @@ static unsigned int __init intc_prio_data(struct intc_desc *desc,
}
fn += (pr->reg_width >> 3) - 1;
n = *fld_idx + 1;
BUG_ON((j + 1) * pr->field_width > pr->reg_width);
BUG_ON(n * pr->field_width > pr->reg_width);
bit = pr->reg_width - ((j + 1) * pr->field_width);
bit = pr->reg_width - (n * pr->field_width);
return _INTC_MK(fn, mode,
intc_get_reg(d, reg_e),
intc_get_reg(d, reg_d),
pr->field_width, bit);
}
*fld_idx = 0;
(*reg_idx)++;
}
return 0;
}
static unsigned int __init intc_prio_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps)
{
unsigned int i = 0;
unsigned int j = 0;
unsigned int ret;
ret = _intc_prio_data(desc, d, enum_id, &i, &j);
if (ret)
return ret;
if (do_grps)
return intc_prio_data(desc, d, intc_grp_id(desc, enum_id), 0);
return 0;
}
static void __init intc_enable_disable_enum(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int enable)
{
unsigned int i, j, data;
/* go through and enable/disable all mask bits */
i = j = 0;
do {
data = _intc_mask_data(desc, d, enum_id, &i, &j);
if (data)
intc_enable_disable(d, data, enable);
j++;
} while (data);
/* go through and enable/disable all priority fields */
i = j = 0;
do {
data = _intc_prio_data(desc, d, enum_id, &i, &j);
if (data)
intc_enable_disable(d, data, enable);
j++;
} while (data);
}
static unsigned int __init intc_ack_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id)
@ -747,6 +851,11 @@ void __init register_intc_controller(struct intc_desc *desc)
d->chip.mask_ack = intc_mask_ack;
}
/* disable bits matching force_enable before registering irqs */
if (desc->force_enable)
intc_enable_disable_enum(desc, d, desc->force_enable, 0);
BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
/* register the vectors one by one */
@ -792,6 +901,10 @@ void __init register_intc_controller(struct intc_desc *desc)
set_irq_data(irq2, (void *)irq);
}
}
/* enable bits matching force_enable after registering irqs */
if (desc->force_enable)
intc_enable_disable_enum(desc, d, desc->force_enable, 1);
}
static int intc_suspend(struct sys_device *dev, pm_message_t state)

1
include/linux/sh_intc.h
View File

@ -71,6 +71,7 @@ struct intc_hw_desc {
struct intc_desc {
char *name;
intc_enum force_enable;
struct intc_hw_desc hw;
};