mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
211 lines
5.4 KiB
211 lines
5.4 KiB
/* |
|
* IRQ chip definitions for INTC IRQs. |
|
* |
|
* Copyright (C) 2007, 2008 Magnus Damm |
|
* Copyright (C) 2009 - 2012 Paul Mundt |
|
* |
|
* This file is subject to the terms and conditions of the GNU General Public |
|
* License. See the file "COPYING" in the main directory of this archive |
|
* for more details. |
|
*/ |
|
#include <linux/cpumask.h> |
|
#include <linux/bsearch.h> |
|
#include <linux/io.h> |
|
#include "internals.h" |
|
|
|
void _intc_enable(struct irq_data *data, unsigned long handle) |
|
{ |
|
unsigned int irq = data->irq; |
|
struct intc_desc_int *d = get_intc_desc(irq); |
|
unsigned long addr; |
|
unsigned int cpu; |
|
|
|
for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) { |
|
#ifdef CONFIG_SMP |
|
if (!cpumask_test_cpu(cpu, irq_data_get_affinity_mask(data))) |
|
continue; |
|
#endif |
|
addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu); |
|
intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\ |
|
[_INTC_FN(handle)], irq); |
|
} |
|
|
|
intc_balancing_enable(irq); |
|
} |
|
|
|
static void intc_enable(struct irq_data *data) |
|
{ |
|
_intc_enable(data, (unsigned long)irq_data_get_irq_chip_data(data)); |
|
} |
|
|
|
static void intc_disable(struct irq_data *data) |
|
{ |
|
unsigned int irq = data->irq; |
|
struct intc_desc_int *d = get_intc_desc(irq); |
|
unsigned long handle = (unsigned long)irq_data_get_irq_chip_data(data); |
|
unsigned long addr; |
|
unsigned int cpu; |
|
|
|
intc_balancing_disable(irq); |
|
|
|
for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) { |
|
#ifdef CONFIG_SMP |
|
if (!cpumask_test_cpu(cpu, irq_data_get_affinity_mask(data))) |
|
continue; |
|
#endif |
|
addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu); |
|
intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\ |
|
[_INTC_FN(handle)], irq); |
|
} |
|
} |
|
|
|
#ifdef CONFIG_SMP |
|
/* |
|
* This is held with the irq desc lock held, so we don't require any |
|
* additional locking here at the intc desc level. The affinity mask is |
|
* later tested in the enable/disable paths. |
|
*/ |
|
static int intc_set_affinity(struct irq_data *data, |
|
const struct cpumask *cpumask, |
|
bool force) |
|
{ |
|
if (!cpumask_intersects(cpumask, cpu_online_mask)) |
|
return -1; |
|
|
|
cpumask_copy(irq_data_get_affinity_mask(data), cpumask); |
|
|
|
return IRQ_SET_MASK_OK_NOCOPY; |
|
} |
|
#endif |
|
|
|
static void intc_mask_ack(struct irq_data *data) |
|
{ |
|
unsigned int irq = data->irq; |
|
struct intc_desc_int *d = get_intc_desc(irq); |
|
unsigned long handle = intc_get_ack_handle(irq); |
|
void __iomem *addr; |
|
|
|
intc_disable(data); |
|
|
|
/* read register and write zero only to the associated bit */ |
|
if (handle) { |
|
unsigned int value; |
|
|
|
addr = (void __iomem *)INTC_REG(d, _INTC_ADDR_D(handle), 0); |
|
value = intc_set_field_from_handle(0, 1, handle); |
|
|
|
switch (_INTC_FN(handle)) { |
|
case REG_FN_MODIFY_BASE + 0: /* 8bit */ |
|
__raw_readb(addr); |
|
__raw_writeb(0xff ^ value, addr); |
|
break; |
|
case REG_FN_MODIFY_BASE + 1: /* 16bit */ |
|
__raw_readw(addr); |
|
__raw_writew(0xffff ^ value, addr); |
|
break; |
|
case REG_FN_MODIFY_BASE + 3: /* 32bit */ |
|
__raw_readl(addr); |
|
__raw_writel(0xffffffff ^ value, addr); |
|
break; |
|
default: |
|
BUG(); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp, |
|
unsigned int nr_hp, |
|
unsigned int irq) |
|
{ |
|
struct intc_handle_int key; |
|
|
|
key.irq = irq; |
|
key.handle = 0; |
|
|
|
return bsearch(&key, hp, nr_hp, sizeof(*hp), intc_handle_int_cmp); |
|
} |
|
|
|
int intc_set_priority(unsigned int irq, unsigned int prio) |
|
{ |
|
struct intc_desc_int *d = get_intc_desc(irq); |
|
struct irq_data *data = irq_get_irq_data(irq); |
|
struct intc_handle_int *ihp; |
|
|
|
if (!intc_get_prio_level(irq) || prio <= 1) |
|
return -EINVAL; |
|
|
|
ihp = intc_find_irq(d->prio, d->nr_prio, irq); |
|
if (ihp) { |
|
if (prio >= (1 << _INTC_WIDTH(ihp->handle))) |
|
return -EINVAL; |
|
|
|
intc_set_prio_level(irq, prio); |
|
|
|
/* |
|
* only set secondary masking method directly |
|
* primary masking method is using intc_prio_level[irq] |
|
* priority level will be set during next enable() |
|
*/ |
|
if (_INTC_FN(ihp->handle) != REG_FN_ERR) |
|
_intc_enable(data, ihp->handle); |
|
} |
|
return 0; |
|
} |
|
|
|
#define SENSE_VALID_FLAG 0x80 |
|
#define VALID(x) (x | SENSE_VALID_FLAG) |
|
|
|
static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = { |
|
[IRQ_TYPE_EDGE_FALLING] = VALID(0), |
|
[IRQ_TYPE_EDGE_RISING] = VALID(1), |
|
[IRQ_TYPE_LEVEL_LOW] = VALID(2), |
|
/* SH7706, SH7707 and SH7709 do not support high level triggered */ |
|
#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \ |
|
!defined(CONFIG_CPU_SUBTYPE_SH7707) && \ |
|
!defined(CONFIG_CPU_SUBTYPE_SH7709) |
|
[IRQ_TYPE_LEVEL_HIGH] = VALID(3), |
|
#endif |
|
#if defined(CONFIG_ARM) /* all recent SH-Mobile / R-Mobile ARM support this */ |
|
[IRQ_TYPE_EDGE_BOTH] = VALID(4), |
|
#endif |
|
}; |
|
|
|
static int intc_set_type(struct irq_data *data, unsigned int type) |
|
{ |
|
unsigned int irq = data->irq; |
|
struct intc_desc_int *d = get_intc_desc(irq); |
|
unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK]; |
|
struct intc_handle_int *ihp; |
|
unsigned long addr; |
|
|
|
if (!value) |
|
return -EINVAL; |
|
|
|
value &= ~SENSE_VALID_FLAG; |
|
|
|
ihp = intc_find_irq(d->sense, d->nr_sense, irq); |
|
if (ihp) { |
|
/* PINT has 2-bit sense registers, should fail on EDGE_BOTH */ |
|
if (value >= (1 << _INTC_WIDTH(ihp->handle))) |
|
return -EINVAL; |
|
|
|
addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0); |
|
intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
struct irq_chip intc_irq_chip = { |
|
.irq_mask = intc_disable, |
|
.irq_unmask = intc_enable, |
|
.irq_mask_ack = intc_mask_ack, |
|
.irq_enable = intc_enable, |
|
.irq_disable = intc_disable, |
|
.irq_set_type = intc_set_type, |
|
#ifdef CONFIG_SMP |
|
.irq_set_affinity = intc_set_affinity, |
|
#endif |
|
.flags = IRQCHIP_SKIP_SET_WAKE, |
|
};
|
|
|