/
aat2870_bl.c
1092 lines (921 loc) · 29.6 KB
/
aat2870_bl.c
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/* drivers/video/backlight/aat2870_bl.c
*
* 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
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/mutex.h>
#include <mach/board_lge.h>
#define MODULE_NAME "aat2870bl"
#define CONFIG_AAT28XX_LEDS_CLASS
//#define CONFIG_AAT28XX_BACKLIGHT_CLASS
#ifdef CONFIG_AAT28XX_LEDS_CLASS
#include <linux/leds.h>
#endif
#ifdef CONFIG_HAS_EARLYSUSPEND
#include <linux/earlysuspend.h>
#endif
/********************************************
* Definition
********************************************/
/* LED current (0~31, unit = mA) */
/* 0.45, 0.90, 1.80, 2.70, 3.60, 4.50, 5.40, 6.30, 7.20, 8.10, */
/* 9.00, 9.90, 10.8, 11.7, 12.6, 13.5, 14.4, 15.3, 16.2, 17.1, */
/* 18.0, 18.9, 19.8, 20.7, 21.6, 22.5, 23.4, 24.3, 25.2, 26.1, */
/* 27.0, 27.9 */
#define LCD_LED_MAX 21 /* 20.32mA */
#define LCD_LED_MIN 0 /* 0.48mA */
#define DEFAULT_BRIGHTNESS 13
#define AAT28XX_LDO_NUM 4
#define AAT2862BL_REG_BLM 0x03 /* Register address for Main BL brightness */
#define AAT2862BL_REG_BLS 0x04 /* Register address for Main BL brightness */
#define AAT2862BL_REG_FADE 0x07 /* Register address for Backlight Fade control */
#define AAT2862BL_REG_LDOAB 0x00 /* Register address for LDO select A/B */
#define AAT2862BL_REG_LDOCD 0x01 /* Register address for LDO select C/D */
#define AAT2862BL_REG_LDOEN 0x02 /* Register address for LDO Enable */
#define AAT2870BL_REG_BLM 0x01 /* Register address for Main BL brightness */
#define AAT2870BL_REG_LDOAB 0x24 /* Register address for LDO select A/B */
#define AAT2870BL_REG_LDOCD 0x25 /* Register address for LDO select C/D */
#define AAT2870BL_REG_LDOEN 0x26 /* Register address for LDO Enable */
#ifdef CONFIG_AAT28XX_LEDS_CLASS
#define LEDS_BACKLIGHT_NAME "lcd-backlight"
#endif
enum {
ALC_MODE,
NORMAL_MODE,
} AAT2870BL_MODE;
enum {
UNINIT_STATE=-1,
POWERON_STATE,
NORMAL_STATE,
SLEEP_STATE,
POWEROFF_STATE
} AAT2870BL_STATE;
#define dprintk(fmt, args...) \
do { \
if (debug) \
printk(KERN_INFO "%s:%s: " fmt, MODULE_NAME, __func__, ## args); \
} while(0);
#define eprintk(fmt, args...) printk(KERN_ERR "%s:%s: " fmt, MODULE_NAME, __func__, ## args)
struct ldo_vout_struct {
unsigned char reg;
unsigned vol;
};
struct aat28xx_ctrl_tbl {
unsigned char reg;
unsigned char val;
};
struct aat28xx_reg_addrs {
unsigned char bl_m;
unsigned char bl_s;
unsigned char fade;
unsigned char ldo_ab;
unsigned char ldo_cd;
unsigned char ldo_en;
};
struct aat28xx_cmds {
struct aat28xx_ctrl_tbl *normal;
struct aat28xx_ctrl_tbl *alc;
struct aat28xx_ctrl_tbl *sleep;
};
struct aat28xx_driver_data {
struct i2c_client *client;
#ifdef CONFIG_AAT28XX_BACKLIGHT_CLASS
struct backlight_device *bd;
#endif
#ifdef CONFIG_AAT28XX_LEDS_CLASS
struct led_classdev *led;
#endif
int gpio;
int intensity;
int max_intensity;
int mode;
int state;
int ldo_ref[AAT28XX_LDO_NUM];
unsigned char reg_ldo_enable;
unsigned char reg_ldo_vout[2];
int version;
int initialized;
struct aat28xx_cmds cmds;
struct aat28xx_reg_addrs reg_addrs;
struct mutex power_lock;
int refcnt;
#ifdef CONFIG_HAS_EARLYSUSPEND
struct early_suspend early_suspend;
#endif
#ifdef CONFIG_MACH_MSM7X27_ALESSI
int is_charging;
int has_alc;
#endif
};
/********************************************
* Global variable
********************************************/
static unsigned int debug = 0;
module_param(debug, uint, 0644);
/* Set to Normal mode */
static struct aat28xx_ctrl_tbl aat2862bl_normal_tbl[] = {
/* LGE_UPDATE_S kideok.kim@lge.com 20101020*/
{ 0x03, 0xD2 }, /* MEQS(7)=high, DISABLE FADE_MAIN(6)=high(disabled), LCD_ON(5)=high(On), Brightness=Default (0x12, 13th setp)*/
// { 0x03, 0xF2 }, /* MEQS(7)=high, DISABLE FADE_MAIN(6)=high(disabled), LCD_ON(5)=high(On), Brightness=Default (0x12, 13th setp)*/
{ 0xFF, 0xFE } /* end of command */
};
/* Set to ALC mode */
static struct aat28xx_ctrl_tbl aat2862bl_alc_tbl[] = {
// AAT2862 has no ALC mode !!
{ 0xFF, 0xFE } /* end or command */
};
/* Set to sleep mode */
static struct aat28xx_ctrl_tbl aat2862bl_sleep_tbl[] = {
{ 0x03, 0xDF }, /* MEQS(7) = high, DISABLE FADE_MAIN(6) = high(disabled), LCD_ON(5) = high(Off), Brightness = Min(0x1F)*/
{ 0xFF, 0xFE }, /* end of command */
};
/* Set to Normal mode */
static struct aat28xx_ctrl_tbl aat2870bl_normal_tbl[] = {
{ 0x00, 0xFF }, /* Channel Enable=ALL */
{ 0x0E, 0x26 }, /* SNSR_LIN_LOG=linear, ALSOUT_LIN_LOG=linear, RSET=1k~4k,
* GAIN=low, GM=auto gain, ALS_EN=off */
{ 0x0F, 0x06 }, /* SBIAS=2.6V, SBIAS=off */
{ 0xFF, 0xFE } /* end of command */
};
/* Set to ALC mode */
static struct aat28xx_ctrl_tbl aat2870bl_alc_tbl[] = {
{ 0x00, 0xFF }, /* Channel Enable : ALL */
{ 0x0E, 0x27 }, /* SNSR_LIN_LOG=linear, ALSOUT_LIN_LOG=linear, RSET=1k~4k,
* GAIN=low, GM=auto gain, ALS_EN=on */
{ 0x0F, 0x07 }, /* SBIAS=2.6V, SBIAS=on */
{ 0x10, 0x00 }, /* CABC=0, OFF_TM=auto, PTME=0.5s, G_ADJ=no */
{ 0xFF, 0xFE } /* end or command */
};
/* Set to sleep mode */
static struct aat28xx_ctrl_tbl aat2870bl_sleep_tbl[] = {
// { 0x0C, 0x00 }, /* FMT=1s, DISABLE_FADE_MAIN=0, FADE_MAIN=fade out */
{ 0x0E, 0x26 }, /* SNSR_LIN_LOG=linear, ALSOUT_LIN_LOG=linear, RSET=1k~4k,
* GAIN=low, GM=auto gain, ALS_EN=off */
{ 0x0F, 0x06 }, /* SBIAS=2.6V, SBIAS=off */
{ 0x00, 0x00 }, /* Channel Enable=disable */
{ 0xFF, 0xFE }, /* end of command */
};
static struct ldo_vout_struct ldo_vout_table[] = {
{/* 0000 */ 0x00, 1200},
{/* 0001 */ 0x01, 1300},
{/* 0010 */ 0x02, 1500},
{/* 0011 */ 0x03, 1600},
{/* 0100 */ 0x04, 1800},
{/* 0101 */ 0x05, 2000},
{/* 0110 */ 0x06, 2200},
{/* 0111 */ 0x07, 2500},
{/* 1000 */ 0x08, 2600},
{/* 1001 */ 0x09, 2700},
{/* 1010 */ 0x0A, 2800},
{/* 1011 */ 0x0B, 2900},
{/* 1100 */ 0x0C, 3000},
{/* 1101 */ 0x0D, 3100},
{/* 1110 */ 0x0E, 3200},
{/* 1111 */ 0x0F, 3300},
{/* Invalid */ 0xFF, 0},
};
/********************************************
* Functions
********************************************/
static int aat28xx_send_intensity_no_check(struct aat28xx_driver_data *drvdata, int next);
static int aat28xx_setup_version(struct aat28xx_driver_data *drvdata)
{
if(!drvdata)
return -ENODEV;
if(drvdata->version == 2862) {
drvdata->cmds.normal = aat2862bl_normal_tbl;
drvdata->cmds.alc = aat2862bl_alc_tbl;
drvdata->cmds.sleep = aat2862bl_sleep_tbl;
drvdata->reg_addrs.bl_m = AAT2862BL_REG_BLM;
drvdata->reg_addrs.bl_s = AAT2862BL_REG_BLS;
drvdata->reg_addrs.fade = AAT2862BL_REG_FADE;
drvdata->reg_addrs.ldo_ab = AAT2862BL_REG_LDOAB;
drvdata->reg_addrs.ldo_cd = AAT2862BL_REG_LDOCD;
drvdata->reg_addrs.ldo_en = AAT2862BL_REG_LDOEN;
}
else if(drvdata->version == 2870) {
drvdata->cmds.normal = aat2870bl_normal_tbl;
drvdata->cmds.alc = aat2870bl_alc_tbl;
drvdata->cmds.sleep = aat2870bl_sleep_tbl;
drvdata->reg_addrs.bl_m = AAT2870BL_REG_BLM;
drvdata->reg_addrs.ldo_ab = AAT2870BL_REG_LDOAB;
drvdata->reg_addrs.ldo_cd = AAT2870BL_REG_LDOCD;
drvdata->reg_addrs.ldo_en = AAT2870BL_REG_LDOEN;
}
else {
eprintk("Not supported version!!\n");
return -ENODEV;
}
return 0;
}
static int aat28xx_read(struct i2c_client *client, u8 reg, u8 *pval)
{
int ret;
int status = 0;
if (client == NULL) { /* No global client pointer? */
eprintk("client is null\n");
return -1;
}
ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0) {
status = -EIO;
eprintk("fail to read(reg=0x%x,val=0x%x)\n", reg,*pval);
}
*pval = ret;
return status;
}
static int aat28xx_write(struct i2c_client *client, u8 reg, u8 val)
{
int ret;
int status = 0;
if (client == NULL) { /* No global client pointer? */
eprintk("client is null\n");
return -1;
}
ret = i2c_smbus_write_byte_data(client, reg, val);
if (ret != 0) {
status = -EIO;
eprintk("fail to write(reg=0x%x,val=0x%x,ret=%d)\n", reg, val, ret);
}
return status;
}
static int aat28xx_set_ldos(struct i2c_client *i2c_dev, unsigned num, int enable)
{
struct aat28xx_driver_data *drvdata = i2c_get_clientdata(i2c_dev);
if (drvdata) {
if (enable) drvdata->reg_ldo_enable |= 1 << (num-1);
else drvdata->reg_ldo_enable &= ~(1 << (num-1));
dprintk("enable ldos, reg:0x13 value:0x%x\n", drvdata->reg_ldo_enable);
return aat28xx_write(i2c_dev, drvdata->reg_addrs.ldo_en, drvdata->reg_ldo_enable);
}
return -EIO;
}
static unsigned char aat28xx_ldo_get_vout_val(unsigned vol)
{
int i = 0;
do {
if (ldo_vout_table[i].vol == vol)
return ldo_vout_table[i].reg;
else
i++;
} while (ldo_vout_table[i].vol != 0);
return ldo_vout_table[i].reg;
}
static int aat28xx_ldo_set_vout(struct i2c_client *i2c_dev, unsigned num, unsigned char val)
{
struct aat28xx_driver_data *drvdata = i2c_get_clientdata(i2c_dev);
unsigned char *next_val;
unsigned char reg;
if (drvdata) {
if (num <= 2) {
reg = drvdata->reg_addrs.ldo_ab;
next_val = &drvdata->reg_ldo_vout[0];
} else {
reg = drvdata->reg_addrs.ldo_cd;
next_val = &drvdata->reg_ldo_vout[1];
}
if (num % 2) {
*next_val &= 0x0F;
val = val << 4;
}
else {
*next_val &= 0xF0;
}
*next_val |= val;
dprintk("target register[0x%x], value[0x%x]\n", reg, *next_val);
return aat28xx_write(i2c_dev, reg, *next_val);
}
return -EIO;
}
/*******************************************************
* Function: aat28xx_ldo_set_level
* Description: Set LDO vout level
* Parameter
* num: ldo number and it is 1-based value
* level: voltage level
*******************************************************/
int aat28xx_ldo_enable(struct device *dev, unsigned num, unsigned enable)
{
struct i2c_adapter *adap;
struct i2c_client *client;
struct aat28xx_driver_data *drvdata;
int err = 0;
dprintk("ldo_no[%d], on/off[%d]\n",num, enable);
if (num > 0 && num <= AAT28XX_LDO_NUM) {
if ((adap=dev_get_drvdata(dev)) && (client=i2c_get_adapdata(adap))) {
drvdata = i2c_get_clientdata(client);
if (enable) {
if (drvdata->ldo_ref[num-1]++ == 0) {
dprintk("ref count = 0, call aat28xx_set_ldos\n");
err = aat28xx_set_ldos(client, num, enable);
}
}
else {
if (--drvdata->ldo_ref[num-1] == 0) {
dprintk("ref count = 0, call aat28xx_set_ldos\n");
err = aat28xx_set_ldos(client, num, enable);
}
}
return err;
}
}
return -ENODEV;
}
EXPORT_SYMBOL(aat28xx_ldo_enable);
/*******************************************************
* Function: aat28xxcp_ldo_set_level
* Description: Set LDO vout level
* Parameter
* num: ldo number and it is 1-based value
* level: voltage level
*******************************************************/
int aat28xx_ldo_set_level(struct device *dev, unsigned num, unsigned vol)
{
struct i2c_adapter *adap;
struct i2c_client *client;
unsigned char val;
dprintk("ldo_no[%d], level[%d]\n", num, vol);
if (num > 0 && num <= AAT28XX_LDO_NUM) {
if ((adap=dev_get_drvdata(dev)) && (client=i2c_get_adapdata(adap))) {
val = aat28xx_ldo_get_vout_val(vol);
dprintk("vout register value 0x%x for level %d\n", val, vol);
return aat28xx_ldo_set_vout(client, num, val);
}
}
return -ENODEV;
}
EXPORT_SYMBOL(aat28xx_ldo_set_level);
static void aat28xx_power_internal(struct aat28xx_driver_data *drvdata, int on)
{
#if defined(CONFIG_MACH_MSM7X27_THUNDERG) || defined(CONFIG_MACH_MSM7X27_ALESSI)
return;
#endif
if(!drvdata || !drvdata->gpio)
return;
if(drvdata->refcnt == 0 && !on) {
printk(KERN_ERR "%s: already in power off!!\n", __func__);
return;
}
printk(KERN_INFO "%s: on = %d, refcnt = %d\n",
__func__, on, drvdata->refcnt);
mutex_lock(&drvdata->power_lock);
if(on) {
if(drvdata->refcnt == 0) {
gpio_set_value(drvdata->gpio, 0);
mdelay(20);
gpio_set_value(drvdata->gpio, 1);
mdelay(2);
}
drvdata->refcnt++;
} else {
drvdata->refcnt--;
if(drvdata->refcnt ==0) {
gpio_set_value(drvdata->gpio, 0);
mdelay(20);
}
}
mutex_unlock(&drvdata->power_lock);
}
void aat28xx_power(struct device *dev, int on)
{
struct i2c_adapter *adap;
struct i2c_client *client;
if((adap = dev_get_drvdata(dev)) && (client=i2c_get_adapdata(adap)))
aat28xx_power_internal(i2c_get_clientdata(client), on);
}
EXPORT_SYMBOL(aat28xx_power);
static int aat28xx_set_table(struct aat28xx_driver_data *drvdata, struct aat28xx_ctrl_tbl *ptbl)
{
unsigned int i = 0;
unsigned long delay = 0;
if (ptbl == NULL) {
eprintk("input ptr is null\n");
return -EIO;
}
for( ;;) {
if (ptbl->reg == 0xFF) {
if (ptbl->val != 0xFE) {
delay = (unsigned long)ptbl->val;
udelay(delay);
}
else
break;
}
else {
if (aat28xx_write(drvdata->client, ptbl->reg, ptbl->val) != 0)
dprintk("i2c failed addr:%d, value:%d\n", ptbl->reg, ptbl->val);
}
ptbl++;
i++;
}
return 0;
}
static void aat28xx_hw_reset(struct aat28xx_driver_data *drvdata)
{
aat28xx_power_internal(drvdata, 1);
}
static void aat28xx_go_opmode(struct aat28xx_driver_data *drvdata)
{
dprintk("operation mode is %s\n", (drvdata->mode == NORMAL_MODE) ? "normal_mode" : "alc_mode");
switch (drvdata->mode) {
case NORMAL_MODE:
aat28xx_set_table(drvdata, drvdata->cmds.normal);
drvdata->state = NORMAL_STATE;
break;
case ALC_MODE:
default:
eprintk("Invalid Mode\n");
break;
}
}
static void aat28xx_device_init(struct aat28xx_driver_data *drvdata)
{
if (drvdata->initialized && system_state == SYSTEM_BOOTING) {
drvdata->refcnt++;
aat28xx_go_opmode(drvdata);
return;
}
aat28xx_hw_reset(drvdata);
aat28xx_go_opmode(drvdata);
}
static void aat28xx_poweron(struct aat28xx_driver_data *drvdata)
{
unsigned int aat28xx_intensity;
if (!drvdata || drvdata->state != POWEROFF_STATE)
return;
dprintk("POWER ON \n");
aat28xx_device_init(drvdata);
if (drvdata->mode == NORMAL_MODE)
{
if(drvdata->version == 2862)
{
aat28xx_intensity = (~(drvdata->intensity)& 0x1F); /* Invert BL control bits and Clear upper 3bits */
aat28xx_intensity |= 0xE0; /* MEQS(7)=1, Disable Fade(6)=1, LCD_ON(5)=1*/
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, aat28xx_intensity);
}
else
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, drvdata->intensity);
}
}
#if 0
static void aat28xx_poweroff(struct aat28xx_driver_data *drvdata)
{
printk("%s backlight power state = %d, gpio %d\n",
__func__, drvdata->state, drvdata->gpio);
if (!drvdata || drvdata->state == POWEROFF_STATE)
return;
dprintk("POWER OFF \n");
if (drvdata->state == SLEEP_STATE) {
gpio_direction_output(drvdata->gpio, 0);
msleep(6);
drvdata->state = POWEROFF_STATE;
return;
}
gpio_tlmm_config(GPIO_CFG(drvdata->gpio, 0, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL, GPIO_CFG_2MA), GPIO_CFG_ENABLE);
gpio_direction_output(drvdata->gpio, 0);
mdelay(6);
drvdata->state = POWEROFF_STATE;
}
#endif
/* This function provide sleep enter routine for power management. */
static void aat28xx_sleep(struct aat28xx_driver_data *drvdata)
{
if (!drvdata || drvdata->state == SLEEP_STATE)
return;
printk(KERN_INFO "%s: cur state=%d to sleep state(2)\n", __func__, drvdata->state);
switch (drvdata->mode) {
case NORMAL_MODE:
drvdata->state = SLEEP_STATE;
aat28xx_set_table(drvdata, drvdata->cmds.sleep);
break;
case ALC_MODE:
default:
eprintk("Invalid Mode\n");
break;
}
}
static void aat28xx_wakeup(struct aat28xx_driver_data *drvdata)
{
if (!drvdata || drvdata->state == NORMAL_STATE)
return;
printk(KERN_INFO "%s: cur state=%d to wakeup state(1)\n", __func__, drvdata->state);
if (drvdata->state == POWEROFF_STATE) {
aat28xx_poweron(drvdata);
} else if (drvdata->state == SLEEP_STATE) {
if (drvdata->mode == NORMAL_MODE) {
if(drvdata->version == 2862) {
aat28xx_write(drvdata->client, drvdata->reg_addrs.fade, 0x00); /* Floor current : 0.48mA */
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, 0x9F);
aat28xx_send_intensity_no_check(drvdata, drvdata->intensity);
} else {
aat28xx_set_table(drvdata, drvdata->cmds.normal);
aat28xx_send_intensity_no_check(drvdata, drvdata->intensity);
}
drvdata->state = NORMAL_STATE;
} else if (drvdata->mode == ALC_MODE) {
printk(KERN_ERR "%s: invalide mode!!!\n", __func__);
}
}
}
static int aat28xx_send_intensity_no_check(struct aat28xx_driver_data *drvdata, int next)
{
int aat2862_bl_next;
if(drvdata->version == 2862) {
if(next != 0) {
aat2862_bl_next = (~next & 0x1F); /* Invert BL control bits and Clear upper 3bits */
aat2862_bl_next |= 0xE0; /* MEQS(7)=1, Disable Fade(6)=1, LCD_ON(5)=1*/
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, aat2862_bl_next);
} else { // Off the backlight if brightness set level is 0.
aat2862_bl_next = 0xDF; /* MEQS(7)=1, Disable Fade(6)=1, LCD_ON(5)=0*/
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, aat2862_bl_next);
}
} else { /* 2870 */
aat28xx_write(drvdata->client, drvdata->reg_addrs.bl_m, next);
}
return 0;
}
static int aat28xx_send_intensity(struct aat28xx_driver_data *drvdata, int next)
{
if (drvdata->mode == NORMAL_MODE) {
if (next > drvdata->max_intensity)
next = drvdata->max_intensity;
if (next < LCD_LED_MIN)
next = LCD_LED_MIN;
dprintk("next current is %d\n", next);
if (drvdata->state == NORMAL_STATE && drvdata->intensity != next)
aat28xx_send_intensity_no_check(drvdata, next);
drvdata->intensity = next;
}
else {
dprintk("A manual setting for intensity is only permitted in normal mode\n");
}
return 0;
}
static int aat28xx_get_intensity(struct aat28xx_driver_data *drvdata)
{
return drvdata->intensity;
}
static int aat28xx_change_max_current(struct aat28xx_driver_data *drvdata, int max_current)
{
drvdata->max_intensity = max_current;
return aat28xx_send_intensity(drvdata, drvdata->max_intensity);
}
#ifdef CONFIG_PM
#ifdef CONFIG_HAS_EARLYSUSPEND
static void aat28xx_early_suspend(struct early_suspend * h)
{
struct aat28xx_driver_data *drvdata = container_of(h, struct aat28xx_driver_data,
early_suspend);
dprintk("start\n");
aat28xx_sleep(drvdata);
aat28xx_power_internal(drvdata, 0);
return;
}
static void aat28xx_late_resume(struct early_suspend * h)
{
struct aat28xx_driver_data *drvdata = container_of(h, struct aat28xx_driver_data,
early_suspend);
dprintk("start\n");
aat28xx_power_internal(drvdata, 1);
aat28xx_wakeup(drvdata);
return;
}
#else
static int aat28xx_suspend(struct i2c_client *i2c_dev, pm_message_t state)
{
struct aat28xx_driver_data *drvdata = i2c_get_clientdata(i2c_dev);
aat28xx_sleep(drvdata);
aat28xx_power_internal(drvdata, 0);
return 0;
}
static int aat28xx_resume(struct i2c_client *i2c_dev)
{
struct aat28xx_driver_data *drvdata = i2c_get_clientdata(i2c_dev);
aat28xx_power_internal(drvdata, 1);
aat28xx_wakeup(drvdata);
return 0;
}
#endif /* CONFIG_HAS_EARLYSUSPEND */
#else
#define aat28xx_suspend NULL
#define aat28xx_resume NULL
#endif /* CONFIG_PM */
/*
* 2011-03-08, jinkyu.choi@lge.com
* if the backlight ic is using vbat power,
* we should turn off the backlight ic when reboot or power down.
*/
static void aat28xx_shutdown(struct i2c_client *i2c_dev) {
struct aat28xx_driver_data *drvdata = i2c_get_clientdata(i2c_dev);
#if 0
printk("%s backlight power state = %d, gpio %d\n",
__func__, drvdata->state, drvdata->gpio);
#endif
/* change the state to sleep and disable the backlight ic */
aat28xx_sleep(drvdata);
aat28xx_power_internal(drvdata, 0);
//printk("%s is done!\n", __func__);
}
void aat28xx_switch_mode(struct device *dev, int next_mode)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev);
if (!drvdata || drvdata->mode == next_mode)
return;
if (next_mode == NORMAL_MODE) {
aat28xx_set_table(drvdata, drvdata->cmds.alc);
aat28xx_send_intensity_no_check(drvdata, drvdata->intensity);
} else {
printk(KERN_ERR "%s: invalid mode(%d)!!!\n", __func__, next_mode);
return;
}
drvdata->mode = next_mode;
return;
}
ssize_t aat28xx_show_alc(struct device *dev, struct device_attribute *attr, char *buf)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
int r;
if (!drvdata) return 0;
r = snprintf(buf, PAGE_SIZE, "%s\n", (drvdata->mode == ALC_MODE) ? "1":"0");
return r;
}
#ifdef CONFIG_MACH_MSM7X27_ALESSI
ssize_t aat28xx_show_chargingmode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
int r;
if (!drvdata) return 0;
r = snprintf(buf, PAGE_SIZE, "%s\n", (drvdata->is_charging) ? "1":"0");
return r;
}
ssize_t aat28xx_store_chargingmode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
int bChargingmode;
if (!count)
return -EINVAL;
sscanf(buf, "%d", &bChargingmode);
drvdata->is_charging = bChargingmode;
return count;
}
#endif
ssize_t aat28xx_store_alc(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int alc;
int next_mode;
if (!count)
return -EINVAL;
sscanf(buf, "%d", &alc);
if (alc)
next_mode = ALC_MODE;
else
next_mode = NORMAL_MODE;
aat28xx_switch_mode(dev->parent, next_mode);
return count;
}
ssize_t aat28xx_show_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev);
int len = 0;
unsigned char val;
len += snprintf(buf, PAGE_SIZE, "\nAAT2870 Registers is following..\n");
aat28xx_read(drvdata->client, 0x00, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[CH_EN(0x00)] = 0x%x\n", val);
aat28xx_read(drvdata->client, 0x01, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[BLM(0x01)] = 0x%x\n", val);
aat28xx_read(drvdata->client, 0x0E, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[ALS(0x0E)] = 0x%x\n", val);
aat28xx_read(drvdata->client, 0x0F, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[SBIAS(0x0F)] = 0x%x\n", val);
aat28xx_read(drvdata->client, 0x10, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[ALS_GAIN(0x10)] = 0x%x\n", val);
aat28xx_read(drvdata->client, 0x11, &val);
len += snprintf(buf + len, PAGE_SIZE - len, "[AMBIENT_LEVEL(0x11)] = 0x%x\n", val);
return len;
}
ssize_t aat28xx_show_drvstat(struct device *dev, struct device_attribute *attr, char *buf)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
int len = 0;
len += snprintf(buf, PAGE_SIZE, "\nAAT2870 Backlight Driver Status is following..\n");
len += snprintf(buf + len, PAGE_SIZE - len, "mode = %3d\n", drvdata->mode);
len += snprintf(buf + len, PAGE_SIZE - len, "state = %3d\n", drvdata->state);
len += snprintf(buf + len, PAGE_SIZE - len, "current intensity = %3d\n", drvdata->intensity);
return len;
}
ssize_t aat28xx_store_max_current(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
int max_current;
if (!count) return -EINVAL;
sscanf(buf, "%d", &max_current);
aat28xx_change_max_current(drvdata, max_current);
return count;
}
ssize_t aat28xx_show_max_current(struct device *dev, struct device_attribute *attr, char *buf)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(dev->parent);
ssize_t len;
len = sprintf(buf, "%d\n", drvdata->max_intensity);
return len;
}
DEVICE_ATTR(alc, 0664, aat28xx_show_alc, aat28xx_store_alc);
DEVICE_ATTR(reg, 0444, aat28xx_show_reg, NULL);
DEVICE_ATTR(drvstat, 0444, aat28xx_show_drvstat, NULL);
DEVICE_ATTR(max_current, 0664, aat28xx_show_max_current, aat28xx_store_max_current);
#ifdef CONFIG_MACH_MSM7X27_ALESSI
DEVICE_ATTR(chargingmode, 0666, aat28xx_show_chargingmode, aat28xx_store_chargingmode);
#endif
#ifdef CONFIG_AAT28XX_BACKLIGHT_CLASS
static int aat28xx_set_brightness(struct backlight_device *bd)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(bd->dev.parent);
return aat28xx_send_intensity(drvdata, bd->props.brightness);
}
static int aat28xx_get_brightness(struct backlight_device *bd)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(bd->dev.parent);
return aat28xx_get_intensity(drvdata);
}
static struct backlight_ops aat28xx_ops = {
.get_brightness = aat28xx_get_brightness,
.update_status = aat28xx_set_brightness,
};
#endif
#ifdef CONFIG_AAT28XX_LEDS_CLASS
static void leds_brightness_set(struct led_classdev *led_cdev, enum led_brightness value)
{
struct aat28xx_driver_data *drvdata = dev_get_drvdata(led_cdev->dev->parent);
int brightness;
int next;
if (!drvdata) {
eprintk("Error getting drvier data\n");
return;
}
brightness = aat28xx_get_intensity(drvdata);
next = value * drvdata->max_intensity / led_cdev->max_brightness;
dprintk("input brightness value=%d]\n", next);
if (brightness != next) {
dprintk("brightness[current=%d, next=%d]\n", brightness, next);
aat28xx_send_intensity(drvdata, next);
}
}
static struct led_classdev aat28xx_led_dev = {
.name = LEDS_BACKLIGHT_NAME,
.brightness_set = leds_brightness_set,
.max_brightness = LED_FULL,
};
#endif
static int __init aat28xx_probe(struct i2c_client *i2c_dev, const struct i2c_device_id *i2c_dev_id)
{
struct aat28xx_platform_data *pdata;
struct aat28xx_driver_data *drvdata;
#ifdef CONFIG_AAT28XX_BACKLIGHT_CLASS
struct backlight_device *bd;
#endif
int err;
dprintk("start, client addr=0x%x\n", i2c_dev->addr);
pdata = i2c_dev->dev.platform_data;
if(!pdata)
return -EINVAL;
drvdata = kzalloc(sizeof(struct aat28xx_driver_data), GFP_KERNEL);
if (!drvdata) {
dev_err(&i2c_dev->dev, "failed to allocate memory\n");
return -ENOMEM;
}
if (pdata && pdata->platform_init)
pdata->platform_init();
drvdata->client = i2c_dev;
drvdata->gpio = pdata->gpio;
drvdata->max_intensity = LCD_LED_MAX;
if (pdata->max_current > 0)
drvdata->max_intensity = pdata->max_current;
drvdata->intensity = LCD_LED_MIN;
drvdata->mode = NORMAL_MODE;
drvdata->state = UNINIT_STATE;
drvdata->version = pdata->version;
drvdata->initialized = pdata->initialized;
#ifdef CONFIG_MACH_MSM7X27_ALESSI
drvdata->has_alc = 1;//pdata->has_alc;
drvdata->is_charging = 0;
#endif
if(aat28xx_setup_version(drvdata) != 0) {
eprintk("Error while requesting gpio %d\n", drvdata->gpio);
kfree(drvdata);
return -ENODEV;
}
if (drvdata->gpio && gpio_request(drvdata->gpio, "aat28xx_en") != 0) {
eprintk("Error while requesting gpio %d\n", drvdata->gpio);
kfree(drvdata);
return -ENODEV;
}
#ifdef CONFIG_AAT28XX_BACKLIGHT_CLASS
bd = backlight_device_register("aat28xx-bl", &i2c_dev->dev, NULL, &aat28xx_ops, NULL);
if (bd == NULL) {
eprintk("entering aat28xx probe function error \n");
if (gpio_is_valid(drvdata->gpio))
gpio_free(drvdata->gpio);
kfree(drvdata);
return -1;
}
bd->props.power = FB_BLANK_UNBLANK;
bd->props.brightness = drvdata->intensity;
bd->props.max_brightness = drvdata->max_intensity;
drvdata->bd = bd;
#endif