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alistair23-linux/drivers/mfd/max77693-irq.c
Chanwoo Choi 424aab7293 mfd: max77693: Fix up bug of wrong interrupt number 
The max77693 MFD device use irq domain method which has hardware interrupt
number and virtual interrupt number getting through irq domain mapping.
This patch use hardware interrupt number instead of virtual interrupt number
to get struct irq_data.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-11-04 09:41:19 +01:00

337 lines
9.9 KiB
C
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/*
* max77693-irq.c - Interrupt controller support for MAX77693
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
* SangYoung Son <hello.son@samsung.com>
*
* This program is not provided / owned by Maxim Integrated Products.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* This driver is based on max8997-irq.c
*/
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/irqdomain.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-private.h>
static const u8 max77693_mask_reg[] = {
[LED_INT] = MAX77693_LED_REG_FLASH_INT_MASK,
[TOPSYS_INT] = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
[CHG_INT] = MAX77693_CHG_REG_CHG_INT_MASK,
[MUIC_INT1] = MAX77693_MUIC_REG_INTMASK1,
[MUIC_INT2] = MAX77693_MUIC_REG_INTMASK2,
[MUIC_INT3] = MAX77693_MUIC_REG_INTMASK3,
};
static struct regmap *max77693_get_regmap(struct max77693_dev *max77693,
enum max77693_irq_source src)
{
switch (src) {
case LED_INT ... CHG_INT:
return max77693->regmap;
case MUIC_INT1 ... MUIC_INT3:
return max77693->regmap_muic;
default:
return ERR_PTR(-EINVAL);
}
}
struct max77693_irq_data {
int mask;
enum max77693_irq_source group;
};
#define DECLARE_IRQ(idx, _group, _mask) \
[(idx)] = { .group = (_group), .mask = (_mask) }
static const struct max77693_irq_data max77693_irqs[] = {
DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_OPEN, LED_INT, 1 << 0),
DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_SHORT, LED_INT, 1 << 1),
DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_OPEN, LED_INT, 1 << 2),
DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_SHORT, LED_INT, 1 << 3),
DECLARE_IRQ(MAX77693_LED_IRQ_MAX_FLASH, LED_INT, 1 << 4),
DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T120C_INT, TOPSYS_INT, 1 << 0),
DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T140C_INT, TOPSYS_INT, 1 << 1),
DECLARE_IRQ(MAX77693_TOPSYS_IRQ_LOWSYS_INT, TOPSYS_INT, 1 << 3),
DECLARE_IRQ(MAX77693_CHG_IRQ_BYP_I, CHG_INT, 1 << 0),
DECLARE_IRQ(MAX77693_CHG_IRQ_THM_I, CHG_INT, 1 << 2),
DECLARE_IRQ(MAX77693_CHG_IRQ_BAT_I, CHG_INT, 1 << 3),
DECLARE_IRQ(MAX77693_CHG_IRQ_CHG_I, CHG_INT, 1 << 4),
DECLARE_IRQ(MAX77693_CHG_IRQ_CHGIN_I, CHG_INT, 1 << 6),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC, MUIC_INT1, 1 << 0),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_LOW, MUIC_INT1, 1 << 1),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_ERR, MUIC_INT1, 1 << 2),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC1K, MUIC_INT1, 1 << 3),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGTYP, MUIC_INT2, 1 << 0),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGDETREUN, MUIC_INT2, 1 << 1),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DCDTMR, MUIC_INT2, 1 << 2),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DXOVP, MUIC_INT2, 1 << 3),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VBVOLT, MUIC_INT2, 1 << 4),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VIDRM, MUIC_INT2, 1 << 5),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_EOC, MUIC_INT3, 1 << 0),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CGMBC, MUIC_INT3, 1 << 1),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_OVP, MUIC_INT3, 1 << 2),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, MUIC_INT3, 1 << 3),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, MUIC_INT3, 1 << 4),
DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_BAT_DET, MUIC_INT3, 1 << 5),
};
static void max77693_irq_lock(struct irq_data *data)
{
struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
mutex_lock(&max77693->irqlock);
}
static void max77693_irq_sync_unlock(struct irq_data *data)
{
struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
int i;
for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
u8 mask_reg = max77693_mask_reg[i];
struct regmap *map = max77693_get_regmap(max77693, i);
if (mask_reg == MAX77693_REG_INVALID ||
IS_ERR_OR_NULL(map))
continue;
max77693->irq_masks_cache[i] = max77693->irq_masks_cur[i];
max77693_write_reg(map, max77693_mask_reg[i],
max77693->irq_masks_cur[i]);
}
mutex_unlock(&max77693->irqlock);
}
static const inline struct max77693_irq_data *
irq_to_max77693_irq(struct max77693_dev *max77693, int irq)
{
struct irq_data *data = irq_get_irq_data(irq);
return &max77693_irqs[data->hwirq];
}
static void max77693_irq_mask(struct irq_data *data)
{
struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
const struct max77693_irq_data *irq_data =
irq_to_max77693_irq(max77693, data->irq);
if (irq_data->group >= MAX77693_IRQ_GROUP_NR)
return;
if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)
max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
else
max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;
}
static void max77693_irq_unmask(struct irq_data *data)
{
struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
const struct max77693_irq_data *irq_data =
irq_to_max77693_irq(max77693, data->irq);
if (irq_data->group >= MAX77693_IRQ_GROUP_NR)
return;
if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)
max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;
else
max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
}
static struct irq_chip max77693_irq_chip = {
.name = "max77693",
.irq_bus_lock = max77693_irq_lock,
.irq_bus_sync_unlock = max77693_irq_sync_unlock,
.irq_mask = max77693_irq_mask,
.irq_unmask = max77693_irq_unmask,
};
#define MAX77693_IRQSRC_CHG (1 << 0)
#define MAX77693_IRQSRC_TOP (1 << 1)
#define MAX77693_IRQSRC_FLASH (1 << 2)
#define MAX77693_IRQSRC_MUIC (1 << 3)
static irqreturn_t max77693_irq_thread(int irq, void *data)
{
struct max77693_dev *max77693 = data;
u8 irq_reg[MAX77693_IRQ_GROUP_NR] = {};
u8 irq_src;
int ret;
int i, cur_irq;
ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_INTSRC,
&irq_src);
if (ret < 0) {
dev_err(max77693->dev, "Failed to read interrupt source: %d\n",
ret);
return IRQ_NONE;
}
if (irq_src & MAX77693_IRQSRC_CHG)
/* CHG_INT */
ret = max77693_read_reg(max77693->regmap, MAX77693_CHG_REG_CHG_INT,
&irq_reg[CHG_INT]);
if (irq_src & MAX77693_IRQSRC_TOP)
/* TOPSYS_INT */
ret = max77693_read_reg(max77693->regmap,
MAX77693_PMIC_REG_TOPSYS_INT, &irq_reg[TOPSYS_INT]);
if (irq_src & MAX77693_IRQSRC_FLASH)
/* LED_INT */
ret = max77693_read_reg(max77693->regmap,
MAX77693_LED_REG_FLASH_INT, &irq_reg[LED_INT]);
if (irq_src & MAX77693_IRQSRC_MUIC)
/* MUIC INT1 ~ INT3 */
max77693_bulk_read(max77693->regmap_muic, MAX77693_MUIC_REG_INT1,
MAX77693_NUM_IRQ_MUIC_REGS, &irq_reg[MUIC_INT1]);
/* Apply masking */
for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
if (i >= MUIC_INT1 && i <= MUIC_INT3)
irq_reg[i] &= max77693->irq_masks_cur[i];
else
irq_reg[i] &= ~max77693->irq_masks_cur[i];
}
/* Report */
for (i = 0; i < MAX77693_IRQ_NR; i++) {
if (irq_reg[max77693_irqs[i].group] & max77693_irqs[i].mask) {
cur_irq = irq_find_mapping(max77693->irq_domain, i);
if (cur_irq)
handle_nested_irq(cur_irq);
}
}
return IRQ_HANDLED;
}
int max77693_irq_resume(struct max77693_dev *max77693)
{
if (max77693->irq)
max77693_irq_thread(0, max77693);
return 0;
}
static int max77693_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
struct max77693_dev *max77693 = d->host_data;
irq_set_chip_data(irq, max77693);
irq_set_chip_and_handler(irq, &max77693_irq_chip, handle_edge_irq);
irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID);
#else
irq_set_noprobe(irq);
#endif
return 0;
}
static struct irq_domain_ops max77693_irq_domain_ops = {
.map = max77693_irq_domain_map,
};
int max77693_irq_init(struct max77693_dev *max77693)
{
struct irq_domain *domain;
int i;
int ret = 0;
u8 intsrc_mask;
mutex_init(&max77693->irqlock);
/* Mask individual interrupt sources */
for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
struct regmap *map;
/* MUIC IRQ 0:MASK 1:NOT MASK */
/* Other IRQ 1:MASK 0:NOT MASK */
if (i >= MUIC_INT1 && i <= MUIC_INT3) {
max77693->irq_masks_cur[i] = 0x00;
max77693->irq_masks_cache[i] = 0x00;
} else {
max77693->irq_masks_cur[i] = 0xff;
max77693->irq_masks_cache[i] = 0xff;
}
map = max77693_get_regmap(max77693, i);
if (IS_ERR_OR_NULL(map))
continue;
if (max77693_mask_reg[i] == MAX77693_REG_INVALID)
continue;
if (i >= MUIC_INT1 && i <= MUIC_INT3)
max77693_write_reg(map, max77693_mask_reg[i], 0x00);
else
max77693_write_reg(map, max77693_mask_reg[i], 0xff);
}
domain = irq_domain_add_linear(NULL, MAX77693_IRQ_NR,
&max77693_irq_domain_ops, max77693);
if (!domain) {
dev_err(max77693->dev, "could not create irq domain\n");
ret = -ENODEV;
goto err_irq;
}
max77693->irq_domain = domain;
/* Unmask max77693 interrupt */
ret = max77693_read_reg(max77693->regmap,
MAX77693_PMIC_REG_INTSRC_MASK, &intsrc_mask);
if (ret < 0) {
dev_err(max77693->dev, "fail to read PMIC register\n");
goto err_irq;
}
intsrc_mask &= ~(MAX77693_IRQSRC_CHG);
intsrc_mask &= ~(MAX77693_IRQSRC_FLASH);
intsrc_mask &= ~(MAX77693_IRQSRC_MUIC);
ret = max77693_write_reg(max77693->regmap,
MAX77693_PMIC_REG_INTSRC_MASK, intsrc_mask);
if (ret < 0) {
dev_err(max77693->dev, "fail to write PMIC register\n");
goto err_irq;
}
ret = request_threaded_irq(max77693->irq, NULL, max77693_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"max77693-irq", max77693);
if (ret)
dev_err(max77693->dev, "Failed to request IRQ %d: %d\n",
max77693->irq, ret);
err_irq:
return ret;
}
void max77693_irq_exit(struct max77693_dev *max77693)
{
if (max77693->irq)
free_irq(max77693->irq, max77693);
}
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