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linux-sg2042/drivers/mfd/rc5t583-irq.c

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/*
* Interrupt driver for RICOH583 power management chip.
*
* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
* Author: Laxman dewangan <ldewangan@nvidia.com>
*
* based on code
* Copyright (C) 2011 RICOH COMPANY,LTD
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/mfd/rc5t583.h>
enum int_type {
SYS_INT = 0x1,
DCDC_INT = 0x2,
RTC_INT = 0x4,
ADC_INT = 0x8,
GPIO_INT = 0x10,
};
static int gpedge_add[] = {
RC5T583_GPIO_GPEDGE2,
RC5T583_GPIO_GPEDGE2
};
static int irq_en_add[] = {
RC5T583_INT_EN_SYS1,
RC5T583_INT_EN_SYS2,
RC5T583_INT_EN_DCDC,
RC5T583_INT_EN_RTC,
RC5T583_INT_EN_ADC1,
RC5T583_INT_EN_ADC2,
RC5T583_INT_EN_ADC3,
RC5T583_GPIO_EN_INT
};
static int irq_mon_add[] = {
RC5T583_INT_MON_SYS1,
RC5T583_INT_MON_SYS2,
RC5T583_INT_MON_DCDC,
RC5T583_INT_MON_RTC,
RC5T583_INT_IR_ADCL,
RC5T583_INT_IR_ADCH,
RC5T583_INT_IR_ADCEND,
RC5T583_INT_IR_GPIOF,
RC5T583_INT_IR_GPIOR
};
static int irq_clr_add[] = {
RC5T583_INT_IR_SYS1,
RC5T583_INT_IR_SYS2,
RC5T583_INT_IR_DCDC,
RC5T583_INT_IR_RTC,
RC5T583_INT_IR_ADCL,
RC5T583_INT_IR_ADCH,
RC5T583_INT_IR_ADCEND,
RC5T583_INT_IR_GPIOF,
RC5T583_INT_IR_GPIOR
};
static int main_int_type[] = {
SYS_INT,
SYS_INT,
DCDC_INT,
RTC_INT,
ADC_INT,
ADC_INT,
ADC_INT,
GPIO_INT,
GPIO_INT,
};
struct rc5t583_irq_data {
u8 int_type;
u8 master_bit;
u8 int_en_bit;
u8 mask_reg_index;
int grp_index;
};
#define RC5T583_IRQ(_int_type, _master_bit, _grp_index, \
_int_bit, _mask_ind) \
{ \
.int_type = _int_type, \
.master_bit = _master_bit, \
.grp_index = _grp_index, \
.int_en_bit = _int_bit, \
.mask_reg_index = _mask_ind, \
}
static const struct rc5t583_irq_data rc5t583_irqs[RC5T583_MAX_IRQS] = {
[RC5T583_IRQ_ONKEY] = RC5T583_IRQ(SYS_INT, 0, 0, 0, 0),
[RC5T583_IRQ_ACOK] = RC5T583_IRQ(SYS_INT, 0, 1, 1, 0),
[RC5T583_IRQ_LIDOPEN] = RC5T583_IRQ(SYS_INT, 0, 2, 2, 0),
[RC5T583_IRQ_PREOT] = RC5T583_IRQ(SYS_INT, 0, 3, 3, 0),
[RC5T583_IRQ_CLKSTP] = RC5T583_IRQ(SYS_INT, 0, 4, 4, 0),
[RC5T583_IRQ_ONKEY_OFF] = RC5T583_IRQ(SYS_INT, 0, 5, 5, 0),
[RC5T583_IRQ_WD] = RC5T583_IRQ(SYS_INT, 0, 7, 7, 0),
[RC5T583_IRQ_EN_PWRREQ1] = RC5T583_IRQ(SYS_INT, 0, 8, 0, 1),
[RC5T583_IRQ_EN_PWRREQ2] = RC5T583_IRQ(SYS_INT, 0, 9, 1, 1),
[RC5T583_IRQ_PRE_VINDET] = RC5T583_IRQ(SYS_INT, 0, 10, 2, 1),
[RC5T583_IRQ_DC0LIM] = RC5T583_IRQ(DCDC_INT, 1, 0, 0, 2),
[RC5T583_IRQ_DC1LIM] = RC5T583_IRQ(DCDC_INT, 1, 1, 1, 2),
[RC5T583_IRQ_DC2LIM] = RC5T583_IRQ(DCDC_INT, 1, 2, 2, 2),
[RC5T583_IRQ_DC3LIM] = RC5T583_IRQ(DCDC_INT, 1, 3, 3, 2),
[RC5T583_IRQ_CTC] = RC5T583_IRQ(RTC_INT, 2, 0, 0, 3),
[RC5T583_IRQ_YALE] = RC5T583_IRQ(RTC_INT, 2, 5, 5, 3),
[RC5T583_IRQ_DALE] = RC5T583_IRQ(RTC_INT, 2, 6, 6, 3),
[RC5T583_IRQ_WALE] = RC5T583_IRQ(RTC_INT, 2, 7, 7, 3),
[RC5T583_IRQ_AIN1L] = RC5T583_IRQ(ADC_INT, 3, 0, 0, 4),
[RC5T583_IRQ_AIN2L] = RC5T583_IRQ(ADC_INT, 3, 1, 1, 4),
[RC5T583_IRQ_AIN3L] = RC5T583_IRQ(ADC_INT, 3, 2, 2, 4),
[RC5T583_IRQ_VBATL] = RC5T583_IRQ(ADC_INT, 3, 3, 3, 4),
[RC5T583_IRQ_VIN3L] = RC5T583_IRQ(ADC_INT, 3, 4, 4, 4),
[RC5T583_IRQ_VIN8L] = RC5T583_IRQ(ADC_INT, 3, 5, 5, 4),
[RC5T583_IRQ_AIN1H] = RC5T583_IRQ(ADC_INT, 3, 6, 0, 5),
[RC5T583_IRQ_AIN2H] = RC5T583_IRQ(ADC_INT, 3, 7, 1, 5),
[RC5T583_IRQ_AIN3H] = RC5T583_IRQ(ADC_INT, 3, 8, 2, 5),
[RC5T583_IRQ_VBATH] = RC5T583_IRQ(ADC_INT, 3, 9, 3, 5),
[RC5T583_IRQ_VIN3H] = RC5T583_IRQ(ADC_INT, 3, 10, 4, 5),
[RC5T583_IRQ_VIN8H] = RC5T583_IRQ(ADC_INT, 3, 11, 5, 5),
[RC5T583_IRQ_ADCEND] = RC5T583_IRQ(ADC_INT, 3, 12, 0, 6),
[RC5T583_IRQ_GPIO0] = RC5T583_IRQ(GPIO_INT, 4, 0, 0, 7),
[RC5T583_IRQ_GPIO1] = RC5T583_IRQ(GPIO_INT, 4, 1, 1, 7),
[RC5T583_IRQ_GPIO2] = RC5T583_IRQ(GPIO_INT, 4, 2, 2, 7),
[RC5T583_IRQ_GPIO3] = RC5T583_IRQ(GPIO_INT, 4, 3, 3, 7),
[RC5T583_IRQ_GPIO4] = RC5T583_IRQ(GPIO_INT, 4, 4, 4, 7),
[RC5T583_IRQ_GPIO5] = RC5T583_IRQ(GPIO_INT, 4, 5, 5, 7),
[RC5T583_IRQ_GPIO6] = RC5T583_IRQ(GPIO_INT, 4, 6, 6, 7),
[RC5T583_IRQ_GPIO7] = RC5T583_IRQ(GPIO_INT, 4, 7, 7, 7),
};
static void rc5t583_irq_lock(struct irq_data *irq_data)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
mutex_lock(&rc5t583->irq_lock);
}
static void rc5t583_irq_unmask(struct irq_data *irq_data)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
unsigned int __irq = irq_data->irq - rc5t583->irq_base;
const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
rc5t583->group_irq_en[data->grp_index] |= 1 << data->grp_index;
rc5t583->intc_inten_reg |= 1 << data->master_bit;
rc5t583->irq_en_reg[data->mask_reg_index] |= 1 << data->int_en_bit;
}
static void rc5t583_irq_mask(struct irq_data *irq_data)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
unsigned int __irq = irq_data->irq - rc5t583->irq_base;
const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
rc5t583->group_irq_en[data->grp_index] &= ~(1 << data->grp_index);
if (!rc5t583->group_irq_en[data->grp_index])
rc5t583->intc_inten_reg &= ~(1 << data->master_bit);
rc5t583->irq_en_reg[data->mask_reg_index] &= ~(1 << data->int_en_bit);
}
static int rc5t583_irq_set_type(struct irq_data *irq_data, unsigned int type)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
unsigned int __irq = irq_data->irq - rc5t583->irq_base;
const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
int val = 0;
int gpedge_index;
int gpedge_bit_pos;
/* Supporting only trigger level inetrrupt */
if ((data->int_type & GPIO_INT) && (type & IRQ_TYPE_EDGE_BOTH)) {
gpedge_index = data->int_en_bit / 4;
gpedge_bit_pos = data->int_en_bit % 4;
if (type & IRQ_TYPE_EDGE_FALLING)
val |= 0x2;
if (type & IRQ_TYPE_EDGE_RISING)
val |= 0x1;
rc5t583->gpedge_reg[gpedge_index] &= ~(3 << gpedge_bit_pos);
rc5t583->gpedge_reg[gpedge_index] |= (val << gpedge_bit_pos);
rc5t583_irq_unmask(irq_data);
return 0;
}
return -EINVAL;
}
static void rc5t583_irq_sync_unlock(struct irq_data *irq_data)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
int i;
int ret;
for (i = 0; i < ARRAY_SIZE(rc5t583->gpedge_reg); i++) {
ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
rc5t583->gpedge_reg[i]);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
gpedge_add[i], ret);
}
for (i = 0; i < ARRAY_SIZE(rc5t583->irq_en_reg); i++) {
ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
rc5t583->irq_en_reg[i]);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
irq_en_add[i], ret);
}
ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN,
rc5t583->intc_inten_reg);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
RC5T583_INTC_INTEN, ret);
mutex_unlock(&rc5t583->irq_lock);
}
#ifdef CONFIG_PM_SLEEP
static int rc5t583_irq_set_wake(struct irq_data *irq_data, unsigned int on)
{
struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
return irq_set_irq_wake(rc5t583->chip_irq, on);
}
#else
#define rc5t583_irq_set_wake NULL
#endif
static irqreturn_t rc5t583_irq(int irq, void *data)
{
struct rc5t583 *rc5t583 = data;
uint8_t int_sts[RC5T583_MAX_INTERRUPT_MASK_REGS];
uint8_t master_int = 0;
int i;
int ret;
unsigned int rtc_int_sts = 0;
/* Clear the status */
for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)
int_sts[i] = 0;
ret = rc5t583_read(rc5t583->dev, RC5T583_INTC_INTMON, &master_int);
if (ret < 0) {
dev_err(rc5t583->dev,
"Error in reading reg 0x%02x error: %d\n",
RC5T583_INTC_INTMON, ret);
return IRQ_HANDLED;
}
for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; ++i) {
if (!(master_int & main_int_type[i]))
continue;
ret = rc5t583_read(rc5t583->dev, irq_mon_add[i], &int_sts[i]);
if (ret < 0) {
dev_warn(rc5t583->dev,
"Error in reading reg 0x%02x error: %d\n",
irq_mon_add[i], ret);
int_sts[i] = 0;
continue;
}
if (main_int_type[i] & RTC_INT) {
rtc_int_sts = 0;
if (int_sts[i] & 0x1)
rtc_int_sts |= BIT(6);
if (int_sts[i] & 0x2)
rtc_int_sts |= BIT(7);
if (int_sts[i] & 0x4)
rtc_int_sts |= BIT(0);
if (int_sts[i] & 0x8)
rtc_int_sts |= BIT(5);
}
ret = rc5t583_write(rc5t583->dev, irq_clr_add[i],
~int_sts[i]);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in reading reg 0x%02x error: %d\n",
irq_clr_add[i], ret);
if (main_int_type[i] & RTC_INT)
int_sts[i] = rtc_int_sts;
}
/* Merge gpio interrupts for rising and falling case*/
int_sts[7] |= int_sts[8];
/* Call interrupt handler if enabled */
for (i = 0; i < RC5T583_MAX_IRQS; ++i) {
const struct rc5t583_irq_data *data = &rc5t583_irqs[i];
if ((int_sts[data->mask_reg_index] & (1 << data->int_en_bit)) &&
(rc5t583->group_irq_en[data->master_bit] &
(1 << data->grp_index)))
handle_nested_irq(rc5t583->irq_base + i);
}
return IRQ_HANDLED;
}
static struct irq_chip rc5t583_irq_chip = {
.name = "rc5t583-irq",
.irq_mask = rc5t583_irq_mask,
.irq_unmask = rc5t583_irq_unmask,
.irq_bus_lock = rc5t583_irq_lock,
.irq_bus_sync_unlock = rc5t583_irq_sync_unlock,
.irq_set_type = rc5t583_irq_set_type,
.irq_set_wake = rc5t583_irq_set_wake,
};
int rc5t583_irq_init(struct rc5t583 *rc5t583, int irq, int irq_base)
{
int i, ret;
if (!irq_base) {
dev_warn(rc5t583->dev, "No interrupt support on IRQ base\n");
return -EINVAL;
}
mutex_init(&rc5t583->irq_lock);
/* Initailize all int register to 0 */
for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
rc5t583->irq_en_reg[i]);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
irq_en_add[i], ret);
}
for (i = 0; i < RC5T583_MAX_GPEDGE_REG; i++) {
ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
rc5t583->gpedge_reg[i]);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
gpedge_add[i], ret);
}
ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN, 0x0);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
RC5T583_INTC_INTEN, ret);
/* Clear all interrupts in case they woke up active. */
for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
ret = rc5t583_write(rc5t583->dev, irq_clr_add[i], 0);
if (ret < 0)
dev_warn(rc5t583->dev,
"Error in writing reg 0x%02x error: %d\n",
irq_clr_add[i], ret);
}
rc5t583->irq_base = irq_base;
rc5t583->chip_irq = irq;
for (i = 0; i < RC5T583_MAX_IRQS; i++) {
int __irq = i + rc5t583->irq_base;
irq_set_chip_data(__irq, rc5t583);
irq_set_chip_and_handler(__irq, &rc5t583_irq_chip,
handle_simple_irq);
irq_set_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(__irq, IRQF_VALID);
#endif
}
ret = request_threaded_irq(irq, NULL, rc5t583_irq, IRQF_ONESHOT,
"rc5t583", rc5t583);
if (ret < 0)
dev_err(rc5t583->dev,
"Error in registering interrupt error: %d\n", ret);
return ret;
}
int rc5t583_irq_exit(struct rc5t583 *rc5t583)
{
if (rc5t583->chip_irq)
free_irq(rc5t583->chip_irq, rc5t583);
return 0;
}
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