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linux-sg2042/drivers/mfd/88pm860x-core.c

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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/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm860x.h>
#define INT_STATUS_NUM 3
char pm860x_backlight_name[][MFD_NAME_SIZE] = {
"backlight-0",
"backlight-1",
"backlight-2",
};
EXPORT_SYMBOL(pm860x_backlight_name);
char pm860x_led_name[][MFD_NAME_SIZE] = {
"led0-red",
"led0-green",
"led0-blue",
"led1-red",
"led1-green",
"led1-blue",
};
EXPORT_SYMBOL(pm860x_led_name);
#define PM8606_BACKLIGHT_RESOURCE(_i, _x) \
{ \
.name = pm860x_backlight_name[_i], \
.start = PM8606_##_x, \
.end = PM8606_##_x, \
.flags = IORESOURCE_IO, \
}
static struct resource backlight_resources[] = {
PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT1, WLED1A),
PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT2, WLED2A),
PM8606_BACKLIGHT_RESOURCE(PM8606_BACKLIGHT3, WLED3A),
};
#define PM8606_BACKLIGHT_DEVS(_i) \
{ \
.name = "88pm860x-backlight", \
.num_resources = 1, \
.resources = &backlight_resources[_i], \
.id = _i, \
}
static struct mfd_cell backlight_devs[] = {
PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT1),
PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT2),
PM8606_BACKLIGHT_DEVS(PM8606_BACKLIGHT3),
};
#define PM8606_LED_RESOURCE(_i, _x) \
{ \
.name = pm860x_led_name[_i], \
.start = PM8606_##_x, \
.end = PM8606_##_x, \
.flags = IORESOURCE_IO, \
}
static struct resource led_resources[] = {
PM8606_LED_RESOURCE(PM8606_LED1_RED, RGB2B),
PM8606_LED_RESOURCE(PM8606_LED1_GREEN, RGB2C),
PM8606_LED_RESOURCE(PM8606_LED1_BLUE, RGB2D),
PM8606_LED_RESOURCE(PM8606_LED2_RED, RGB1B),
PM8606_LED_RESOURCE(PM8606_LED2_GREEN, RGB1C),
PM8606_LED_RESOURCE(PM8606_LED2_BLUE, RGB1D),
};
#define PM8606_LED_DEVS(_i) \
{ \
.name = "88pm860x-led", \
.num_resources = 1, \
.resources = &led_resources[_i], \
.id = _i, \
}
static struct mfd_cell led_devs[] = {
PM8606_LED_DEVS(PM8606_LED1_RED),
PM8606_LED_DEVS(PM8606_LED1_GREEN),
PM8606_LED_DEVS(PM8606_LED1_BLUE),
PM8606_LED_DEVS(PM8606_LED2_RED),
PM8606_LED_DEVS(PM8606_LED2_GREEN),
PM8606_LED_DEVS(PM8606_LED2_BLUE),
};
static struct resource touch_resources[] = {
{
.start = PM8607_IRQ_PEN,
.end = PM8607_IRQ_PEN,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell touch_devs[] = {
{
.name = "88pm860x-touch",
.num_resources = 1,
.resources = &touch_resources[0],
},
};
#define PM8607_REG_RESOURCE(_start, _end) \
{ \
.start = PM8607_##_start, \
.end = PM8607_##_end, \
.flags = IORESOURCE_IO, \
}
static struct resource power_supply_resources[] = {
{
.name = "88pm860x-power",
.start = PM8607_IRQ_CHG,
.end = PM8607_IRQ_CHG,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell power_devs[] = {
{
.name = "88pm860x-power",
.num_resources = 1,
.resources = &power_supply_resources[0],
.id = -1,
},
};
static struct resource onkey_resources[] = {
{
.name = "88pm860x-onkey",
.start = PM8607_IRQ_ONKEY,
.end = PM8607_IRQ_ONKEY,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell onkey_devs[] = {
{
.name = "88pm860x-onkey",
.num_resources = 1,
.resources = &onkey_resources[0],
.id = -1,
},
};
static struct resource 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 = &regulator_resources[PM8607_ID_##_id], \
.id = PM8607_ID_##_id, \
}
static struct mfd_cell regulator_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),
};
struct pm860x_irq_data {
int reg;
int mask_reg;
int enable; /* enable or not */
int offs; /* bit offset in mask register */
};
static struct pm860x_irq_data pm860x_irqs[] = {
[PM8607_IRQ_ONKEY] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 0,
},
[PM8607_IRQ_EXTON] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 1,
},
[PM8607_IRQ_CHG] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 2,
},
[PM8607_IRQ_BAT] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 3,
},
[PM8607_IRQ_RTC] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 4,
},
[PM8607_IRQ_CC] = {
.reg = PM8607_INT_STATUS1,
.mask_reg = PM8607_INT_MASK_1,
.offs = 1 << 5,
},
[PM8607_IRQ_VBAT] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 0,
},
[PM8607_IRQ_VCHG] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 1,
},
[PM8607_IRQ_VSYS] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 2,
},
[PM8607_IRQ_TINT] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 3,
},
[PM8607_IRQ_GPADC0] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 4,
},
[PM8607_IRQ_GPADC1] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 5,
},
[PM8607_IRQ_GPADC2] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 6,
},
[PM8607_IRQ_GPADC3] = {
.reg = PM8607_INT_STATUS2,
.mask_reg = PM8607_INT_MASK_2,
.offs = 1 << 7,
},
[PM8607_IRQ_AUDIO_SHORT] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 0,
},
[PM8607_IRQ_PEN] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 1,
},
[PM8607_IRQ_HEADSET] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 2,
},
[PM8607_IRQ_HOOK] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 3,
},
[PM8607_IRQ_MICIN] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 4,
},
[PM8607_IRQ_CHG_FAIL] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 5,
},
[PM8607_IRQ_CHG_DONE] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 6,
},
[PM8607_IRQ_CHG_FAULT] = {
.reg = PM8607_INT_STATUS3,
.mask_reg = PM8607_INT_MASK_3,
.offs = 1 << 7,
},
};
static inline struct pm860x_irq_data *irq_to_pm860x(struct pm860x_chip *chip,
int irq)
{
return &pm860x_irqs[irq - chip->irq_base];
}
static irqreturn_t pm860x_irq(int irq, void *data)
{
struct pm860x_chip *chip = data;
struct pm860x_irq_data *irq_data;
struct i2c_client *i2c;
int read_reg = -1, value = 0;
int i;
i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
irq_data = &pm860x_irqs[i];
if (read_reg != irq_data->reg) {
read_reg = irq_data->reg;
value = pm860x_reg_read(i2c, irq_data->reg);
}
if (value & irq_data->enable)
handle_nested_irq(chip->irq_base + i);
}
return IRQ_HANDLED;
}
static void pm860x_irq_lock(unsigned int irq)
{
struct pm860x_chip *chip = get_irq_chip_data(irq);
mutex_lock(&chip->irq_lock);
}
static void pm860x_irq_sync_unlock(unsigned int irq)
{
struct pm860x_chip *chip = get_irq_chip_data(irq);
struct pm860x_irq_data *irq_data;
struct i2c_client *i2c;
static unsigned char cached[3] = {0x0, 0x0, 0x0};
unsigned char mask[3];
int i;
i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
/* Load cached value. In initial, all IRQs are masked */
for (i = 0; i < 3; i++)
mask[i] = cached[i];
for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
irq_data = &pm860x_irqs[i];
switch (irq_data->mask_reg) {
case PM8607_INT_MASK_1:
mask[0] &= ~irq_data->offs;
mask[0] |= irq_data->enable;
break;
case PM8607_INT_MASK_2:
mask[1] &= ~irq_data->offs;
mask[1] |= irq_data->enable;
break;
case PM8607_INT_MASK_3:
mask[2] &= ~irq_data->offs;
mask[2] |= irq_data->enable;
break;
default:
dev_err(chip->dev, "wrong IRQ\n");
break;
}
}
/* update mask into registers */
for (i = 0; i < 3; i++) {
if (mask[i] != cached[i]) {
cached[i] = mask[i];
pm860x_reg_write(i2c, PM8607_INT_MASK_1 + i, mask[i]);
}
}
mutex_unlock(&chip->irq_lock);
}
static void pm860x_irq_enable(unsigned int irq)
{
struct pm860x_chip *chip = get_irq_chip_data(irq);
pm860x_irqs[irq - chip->irq_base].enable
= pm860x_irqs[irq - chip->irq_base].offs;
}
static void pm860x_irq_disable(unsigned int irq)
{
struct pm860x_chip *chip = get_irq_chip_data(irq);
pm860x_irqs[irq - chip->irq_base].enable = 0;
}
static struct irq_chip pm860x_irq_chip = {
.name = "88pm860x",
.bus_lock = pm860x_irq_lock,
.bus_sync_unlock = pm860x_irq_sync_unlock,
.enable = pm860x_irq_enable,
.disable = pm860x_irq_disable,
};
static int __devinit device_gpadc_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata)
{
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
int use_gpadc = 0, data, ret;
/* initialize GPADC without activating it */
if (pdata && pdata->touch) {
/* set GPADC MISC1 register */
data = 0;
data |= (pdata->touch->gpadc_prebias << 1)
& PM8607_GPADC_PREBIAS_MASK;
data |= (pdata->touch->slot_cycle << 3)
& PM8607_GPADC_SLOT_CYCLE_MASK;
data |= (pdata->touch->off_scale << 5)
& PM8607_GPADC_OFF_SCALE_MASK;
data |= (pdata->touch->sw_cal << 7)
& PM8607_GPADC_SW_CAL_MASK;
if (data) {
ret = pm860x_reg_write(i2c, PM8607_GPADC_MISC1, data);
if (ret < 0)
goto out;
}
/* set tsi prebias time */
if (pdata->touch->tsi_prebias) {
data = pdata->touch->tsi_prebias;
ret = pm860x_reg_write(i2c, PM8607_TSI_PREBIAS, data);
if (ret < 0)
goto out;
}
/* set prebias & prechg time of pen detect */
data = 0;
data |= pdata->touch->pen_prebias & PM8607_PD_PREBIAS_MASK;
data |= (pdata->touch->pen_prechg << 5)
& PM8607_PD_PRECHG_MASK;
if (data) {
ret = pm860x_reg_write(i2c, PM8607_PD_PREBIAS, data);
if (ret < 0)
goto out;
}
use_gpadc = 1;
}
/* turn on GPADC */
if (use_gpadc) {
ret = pm860x_set_bits(i2c, PM8607_GPADC_MISC1,
PM8607_GPADC_EN, PM8607_GPADC_EN);
}
out:
return ret;
}
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];
unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
struct irq_desc *desc;
int i, data, mask, ret = -EINVAL;
int __irq;
if (!pdata || !pdata->irq_base) {
dev_warn(chip->dev, "No interrupt support on IRQ base\n");
return -EINVAL;
}
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;
mutex_init(&chip->irq_lock);
chip->irq_base = pdata->irq_base;
chip->core_irq = i2c->irq;
if (!chip->core_irq)
goto out;
desc = irq_to_desc(chip->core_irq);
/* register IRQ by genirq */
for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
__irq = i + chip->irq_base;
set_irq_chip_data(__irq, chip);
set_irq_chip_and_handler(__irq, &pm860x_irq_chip,
handle_edge_irq);
set_irq_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(__irq, IRQF_VALID);
#else
set_irq_noprobe(__irq);
#endif
}
ret = request_threaded_irq(chip->core_irq, NULL, pm860x_irq, flags,
"88pm860x", chip);
if (ret) {
dev_err(chip->dev, "Failed to request IRQ: %d\n", ret);
chip->core_irq = 0;
}
return 0;
out:
chip->core_irq = 0;
return ret;
}
static void __devexit device_irq_exit(struct pm860x_chip *chip)
{
if (chip->core_irq)
free_irq(chip->core_irq, chip);
}
static void __devinit device_8606_init(struct pm860x_chip *chip,
struct i2c_client *i2c,
struct pm860x_platform_data *pdata)
{
int ret;
if (pdata && pdata->backlight) {
ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
ARRAY_SIZE(backlight_devs),
&backlight_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add backlight "
"subdev\n");
goto out_dev;
}
}
if (pdata && pdata->led) {
ret = mfd_add_devices(chip->dev, 0, &led_devs[0],
ARRAY_SIZE(led_devs),
&led_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add led "
"subdev\n");
goto out_dev;
}
}
return;
out_dev:
mfd_remove_devices(chip->dev);
device_irq_exit(chip);
}
static void __devinit device_8607_init(struct pm860x_chip *chip,
struct i2c_client *i2c,
struct pm860x_platform_data *pdata)
{
int data, 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_gpadc_init(chip, pdata);
if (ret < 0)
goto out;
ret = device_irq_init(chip, pdata);
if (ret < 0)
goto out;
ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
ARRAY_SIZE(regulator_devs),
&regulator_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add regulator subdev\n");
goto out_dev;
}
if (pdata && pdata->touch) {
ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
ARRAY_SIZE(touch_devs),
&touch_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add touch "
"subdev\n");
goto out_dev;
}
}
if (pdata && pdata->power) {
ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
ARRAY_SIZE(power_devs),
&power_supply_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add power supply "
"subdev\n");
goto out_dev;
}
}
ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
ARRAY_SIZE(onkey_devs),
&onkey_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add onkey subdev\n");
goto out_dev;
}
return;
out_dev:
mfd_remove_devices(chip->dev);
device_irq_exit(chip);
out:
return;
}
int pm860x_device_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata)
{
chip->core_irq = 0;
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");
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