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/*
* Base driver for Marvell 88PM8607
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm860x.h>
#define PM8607_REG_RESOURCE(_start, _end) \
{ \
.start = PM8607_##_start, \
.end = PM8607_##_end, \
.flags = IORESOURCE_IO, \
}
static struct resource pm8607_regulator_resources[] = {
PM8607_REG_RESOURCE(BUCK1, BUCK1),
PM8607_REG_RESOURCE(BUCK2, BUCK2),
PM8607_REG_RESOURCE(BUCK3, BUCK3),
PM8607_REG_RESOURCE(LDO1, LDO1),
PM8607_REG_RESOURCE(LDO2, LDO2),
PM8607_REG_RESOURCE(LDO3, LDO3),
PM8607_REG_RESOURCE(LDO4, LDO4),
PM8607_REG_RESOURCE(LDO5, LDO5),
PM8607_REG_RESOURCE(LDO6, LDO6),
PM8607_REG_RESOURCE(LDO7, LDO7),
PM8607_REG_RESOURCE(LDO8, LDO8),
PM8607_REG_RESOURCE(LDO9, LDO9),
PM8607_REG_RESOURCE(LDO10, LDO10),
PM8607_REG_RESOURCE(LDO12, LDO12),
PM8607_REG_RESOURCE(LDO14, LDO14),
};
#define PM8607_REG_DEVS(_name, _id) \
{ \
.name = "88pm8607-" #_name, \
.num_resources = 1, \
.resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
}
static struct mfd_cell pm8607_devs[] = {
PM8607_REG_DEVS(buck1, BUCK1),
PM8607_REG_DEVS(buck2, BUCK2),
PM8607_REG_DEVS(buck3, BUCK3),
PM8607_REG_DEVS(ldo1, LDO1),
PM8607_REG_DEVS(ldo2, LDO2),
PM8607_REG_DEVS(ldo3, LDO3),
PM8607_REG_DEVS(ldo4, LDO4),
PM8607_REG_DEVS(ldo5, LDO5),
PM8607_REG_DEVS(ldo6, LDO6),
PM8607_REG_DEVS(ldo7, LDO7),
PM8607_REG_DEVS(ldo8, LDO8),
PM8607_REG_DEVS(ldo9, LDO9),
PM8607_REG_DEVS(ldo10, LDO10),
PM8607_REG_DEVS(ldo12, LDO12),
PM8607_REG_DEVS(ldo14, LDO14),
};
#define CHECK_IRQ(irq) \
do { \
if ((irq < 0) || (irq >= PM860X_NUM_IRQ)) \
return -EINVAL; \
} while (0)
/* IRQs only occur on 88PM8607 */
int pm860x_mask_irq(struct pm860x_chip *chip, int irq)
{
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
int offset, data, ret;
CHECK_IRQ(irq);
offset = (irq >> 3) + PM8607_INT_MASK_1;
data = 1 << (irq % 8);
ret = pm860x_set_bits(i2c, offset, data, 0);
return ret;
}
EXPORT_SYMBOL(pm860x_mask_irq);
int pm860x_unmask_irq(struct pm860x_chip *chip, int irq)
{
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
int offset, data, ret;
CHECK_IRQ(irq);
offset = (irq >> 3) + PM8607_INT_MASK_1;
data = 1 << (irq % 8);
ret = pm860x_set_bits(i2c, offset, data, data);
return ret;
}
EXPORT_SYMBOL(pm860x_unmask_irq);
#define INT_STATUS_NUM (3)
static irqreturn_t pm8607_irq_thread(int irq, void *data)
{
DECLARE_BITMAP(irq_status, PM860X_NUM_IRQ);
struct pm860x_chip *chip = data;
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
unsigned char status_buf[INT_STATUS_NUM << 1];
unsigned long value;
int i, ret;
irq_status[0] = 0;
/* read out status register */
ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
INT_STATUS_NUM << 1, status_buf);
if (ret < 0)
goto out;
if (chip->irq_mode) {
/* 0, clear by read. 1, clear by write */
ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
INT_STATUS_NUM, status_buf);
if (ret < 0)
goto out;
}
/* clear masked interrupt status */
for (i = 0, value = 0; i < INT_STATUS_NUM; i++) {
status_buf[i] &= status_buf[i + INT_STATUS_NUM];
irq_status[0] |= status_buf[i] << (i * 8);
}
while (!bitmap_empty(irq_status, PM860X_NUM_IRQ)) {
irq = find_first_bit(irq_status, PM860X_NUM_IRQ);
clear_bit(irq, irq_status);
dev_dbg(chip->dev, "Servicing IRQ #%d\n", irq);
mutex_lock(&chip->irq_lock);
if (chip->irq[irq].handler)
chip->irq[irq].handler(irq, chip->irq[irq].data);
else {
pm860x_mask_irq(chip, irq);
dev_err(chip->dev, "Nobody cares IRQ %d. "
"Now mask it.\n", irq);
for (i = 0; i < (INT_STATUS_NUM << 1); i++) {
dev_err(chip->dev, "status[%d]:%x\n", i,
status_buf[i]);
}
}
mutex_unlock(&chip->irq_lock);
}
out:
return IRQ_HANDLED;
}
int pm860x_request_irq(struct pm860x_chip *chip, int irq,
irq_handler_t handler, void *data)
{
CHECK_IRQ(irq);
if (!handler)
return -EINVAL;
mutex_lock(&chip->irq_lock);
chip->irq[irq].handler = handler;
chip->irq[irq].data = data;
mutex_unlock(&chip->irq_lock);
return 0;
}
EXPORT_SYMBOL(pm860x_request_irq);
int pm860x_free_irq(struct pm860x_chip *chip, int irq)
{
CHECK_IRQ(irq);
mutex_lock(&chip->irq_lock);
chip->irq[irq].handler = NULL;
chip->irq[irq].data = NULL;
mutex_unlock(&chip->irq_lock);
return 0;
}
EXPORT_SYMBOL(pm860x_free_irq);
static int __devinit device_irq_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata)
{
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
unsigned char status_buf[INT_STATUS_NUM];
int data, mask, ret = -EINVAL;
mutex_init(&chip->irq_lock);
mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR
| PM8607_B0_MISC1_INT_MASK;
data = 0;
chip->irq_mode = 0;
if (pdata && pdata->irq_mode) {
/*
* irq_mode defines the way of clearing interrupt. If it's 1,
* clear IRQ by write. Otherwise, clear it by read.
* This control bit is valid from 88PM8607 B0 steping.
*/
data |= PM8607_B0_MISC1_INT_CLEAR;
chip->irq_mode = 1;
}
ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data);
if (ret < 0)
goto out;
/* mask all IRQs */
memset(status_buf, 0, INT_STATUS_NUM);
ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1,
INT_STATUS_NUM, status_buf);
if (ret < 0)
goto out;
if (chip->irq_mode) {
/* clear interrupt status by write */
memset(status_buf, 0xFF, INT_STATUS_NUM);
ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
INT_STATUS_NUM, status_buf);
} else {
/* clear interrupt status by read */
ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
INT_STATUS_NUM, status_buf);
}
if (ret < 0)
goto out;
memset(chip->irq, 0, sizeof(struct pm860x_irq) * PM860X_NUM_IRQ);
ret = request_threaded_irq(i2c->irq, NULL, pm8607_irq_thread,
IRQF_ONESHOT | IRQF_TRIGGER_LOW,
"88PM8607", chip);
if (ret < 0) {
dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
goto out;
}
chip->chip_irq = i2c->irq;
return 0;
out:
return ret;
}
static void __devexit device_irq_exit(struct pm860x_chip *chip)
{
if (chip->chip_irq >= 0)
free_irq(chip->chip_irq, chip);
}
static void __devinit device_8606_init(struct pm860x_chip *chip,
struct i2c_client *i2c,
struct pm860x_platform_data *pdata)
{
}
static void __devinit device_8607_init(struct pm860x_chip *chip,
struct i2c_client *i2c,
struct pm860x_platform_data *pdata)
{
int i, count, data;
int ret;
ret = pm860x_reg_read(i2c, PM8607_CHIP_ID);
if (ret < 0) {
dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
goto out;
}
if ((ret & PM8607_VERSION_MASK) == PM8607_VERSION)
dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
ret);
else {
dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
"Chip ID: %02x\n", ret);
goto out;
}
ret = pm860x_reg_read(i2c, PM8607_BUCK3);
if (ret < 0) {
dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
goto out;
}
if (ret & PM8607_BUCK3_DOUBLE)
chip->buck3_double = 1;
ret = pm860x_reg_read(i2c, PM8607_B0_MISC1);
if (ret < 0) {
dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
goto out;
}
if (pdata && (pdata->i2c_port == PI2C_PORT))
data = PM8607_B0_MISC1_PI2C;
else
data = 0;
ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data);
if (ret < 0) {
dev_err(chip->dev, "Failed to access MISC1:%d\n", ret);
goto out;
}
ret = device_irq_init(chip, pdata);
if (ret < 0)
goto out;
count = ARRAY_SIZE(pm8607_devs);
for (i = 0; i < count; i++) {
ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
1, NULL, 0);
if (ret != 0) {
dev_err(chip->dev, "Failed to add subdevs\n");
goto out;
}
}
out:
return;
}
int pm860x_device_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata)
{
chip->chip_irq = -EINVAL;
switch (chip->id) {
case CHIP_PM8606:
device_8606_init(chip, chip->client, pdata);
break;
case CHIP_PM8607:
device_8607_init(chip, chip->client, pdata);
break;
}
if (chip->companion) {
switch (chip->id) {
case CHIP_PM8607:
device_8606_init(chip, chip->companion, pdata);
break;
case CHIP_PM8606:
device_8607_init(chip, chip->companion, pdata);
break;
}
}
return 0;
}
void pm860x_device_exit(struct pm860x_chip *chip)
{
device_irq_exit(chip);
mfd_remove_devices(chip->dev);
}
MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM860x");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");
|
