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jz_battery: improve driver code.

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1. put all gobal var to a driver info struct.
2. check gpio before use it.

Signed-off-by: Jiejing.Zhang <kzjeef@gmail.com>
This commit is contained in:
Jiejing.Zhang 2009-09-22 18:33:35 +08:00 committed by Xiangfu Liu
parent ae01e2fb2c
commit c91cec083b
1 changed files with 81 additions and 58 deletions
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139
target/linux/xburst/files-2.6.31/drivers/power/jz4740-battery.c
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@ -23,16 +23,18 @@
#include <linux/power/jz4740-battery.h> #include <linux/power/jz4740-battery.h>
#include <linux/jz4740-adc.h> #include <linux/jz4740-adc.h>
/*struct jz_battery {*/ struct jz_battery_info {
static int bat_status = POWER_SUPPLY_STATUS_DISCHARGING; int bat_status;
static struct jz_batt_info *pdata = 0; struct jz_batt_info *pdata;
struct mutex work_lock; struct mutex work_lock;
struct workqueue_struct *monitor_wqueue; struct workqueue_struct *monitor_wqueue;
struct delayed_work bat_work; struct delayed_work bat_work;
/*};*/ };
static struct jz_battery_info jz_main_bat = {
.bat_status = POWER_SUPPLY_STATUS_DISCHARGING,
.pdata = 0,
};
/********************************************************************* /*********************************************************************
* Power * Power
@ -42,8 +44,13 @@ static int jz_get_power_prop(struct power_supply *psy,
enum power_supply_property psp, enum power_supply_property psp,
union power_supply_propval *val) union power_supply_propval *val)
{ {
int gpio = (psy->type == POWER_SUPPLY_TYPE_MAINS) ? pdata->dc_dect_gpio : if (!jz_main_bat.pdata)
pdata->usb_dect_gpio; return -EINVAL;
int gpio = (psy->type == POWER_SUPPLY_TYPE_MAINS) ? jz_main_bat.pdata->dc_dect_gpio : jz_main_bat.pdata->usb_dect_gpio;
if (!gpio_is_valid(gpio))
return -EINVAL;
switch (psp) { switch (psp) {
case POWER_SUPPLY_PROP_ONLINE: case POWER_SUPPLY_PROP_ONLINE:
val->intval = !gpio_get_value(gpio); val->intval = !gpio_get_value(gpio);
@ -83,7 +90,10 @@ static struct power_supply jz_usb = {
static long jz_read_bat(struct power_supply *bat_ps) static long jz_read_bat(struct power_supply *bat_ps)
{ {
enum jz_adc_battery_scale scale; enum jz_adc_battery_scale scale;
if (pdata->max_voltag > 2500000) if (!jz_main_bat.pdata)
return -EINVAL;
if (jz_main_bat.pdata->max_voltag > 2500000)
scale = JZ_ADC_BATTERY_SCALE_7V5; scale = JZ_ADC_BATTERY_SCALE_7V5;
else else
scale = JZ_ADC_BATTERY_SCALE_2V5; scale = JZ_ADC_BATTERY_SCALE_2V5;
@ -95,13 +105,16 @@ static int jz_bat_get_capacity(struct power_supply *bat_ps)
{ {
int ret; int ret;
if (!jz_main_bat.pdata)
return -EINVAL;
ret = jz_read_bat(bat_ps); ret = jz_read_bat(bat_ps);
if (ret < 0) if (ret < 0)
return ret; return ret;
ret = (ret - pdata->min_voltag) * 100 ret = (ret - jz_main_bat.pdata->min_voltag) * 100
/ (pdata->max_voltag - pdata->min_voltag); / (jz_main_bat.pdata->max_voltag - jz_main_bat.pdata->min_voltag);
if (ret > 100) if (ret > 100)
ret = 100; ret = 100;
@ -115,15 +128,18 @@ static int jz_bat_get_property(struct power_supply *bat_ps,
enum power_supply_property psp, enum power_supply_property psp,
union power_supply_propval *val) union power_supply_propval *val)
{ {
if (!jz_main_bat.pdata)
return -EINVAL;
switch (psp) { switch (psp) {
case POWER_SUPPLY_PROP_STATUS: case POWER_SUPPLY_PROP_STATUS:
val->intval = bat_status; val->intval = jz_main_bat.bat_status;
break; break;
case POWER_SUPPLY_PROP_TECHNOLOGY: case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = pdata->batt_tech; val->intval = jz_main_bat.pdata->batt_tech;
break; break;
case POWER_SUPPLY_PROP_HEALTH: case POWER_SUPPLY_PROP_HEALTH:
if(jz_read_bat(bat_ps) < pdata->min_voltag) { if(jz_read_bat(bat_ps) < jz_main_bat.pdata->min_voltag) {
dev_dbg(bat_ps->dev, "%s: battery is dead," dev_dbg(bat_ps->dev, "%s: battery is dead,"
"voltage too low!\n", __func__); "voltage too low!\n", __func__);
val->intval = POWER_SUPPLY_HEALTH_DEAD; val->intval = POWER_SUPPLY_HEALTH_DEAD;
@ -145,10 +161,10 @@ static int jz_bat_get_property(struct power_supply *bat_ps,
break; break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX: case POWER_SUPPLY_PROP_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = pdata->max_voltag; val->intval = jz_main_bat.pdata->max_voltag;
break; break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = pdata->min_voltag; val->intval = jz_main_bat.pdata->min_voltag;
break; break;
case POWER_SUPPLY_PROP_PRESENT: case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1; val->intval = 1;
@ -161,8 +177,8 @@ static int jz_bat_get_property(struct power_supply *bat_ps,
static void jz_bat_external_power_changed(struct power_supply *bat_ps) static void jz_bat_external_power_changed(struct power_supply *bat_ps)
{ {
cancel_delayed_work(&bat_work); cancel_delayed_work(&jz_main_bat.bat_work);
queue_delayed_work(monitor_wqueue, &bat_work, HZ / 8); queue_delayed_work(jz_main_bat.monitor_wqueue, &jz_main_bat.bat_work, HZ / 8);
} }
static char *status_text[] = { static char *status_text[] = {
@ -174,31 +190,38 @@ static char *status_text[] = {
static void jz_bat_update(struct power_supply *bat_ps) static void jz_bat_update(struct power_supply *bat_ps)
{ {
int old_status = bat_status; int old_status = jz_main_bat.bat_status;
static unsigned long old_batt_vol = 0; static unsigned long old_batt_vol = 0;
unsigned long batt_vol = jz_read_bat(bat_ps); unsigned long batt_vol = jz_read_bat(bat_ps);
mutex_lock(&work_lock); mutex_lock(&jz_main_bat.work_lock);
if(!gpio_get_value(pdata->charg_stat_gpio)) if (!jz_main_bat.pdata)
bat_status = POWER_SUPPLY_STATUS_CHARGING; goto err;
if (!gpio_is_valid(jz_main_bat.pdata->charg_stat_gpio))
goto err;
if(!gpio_get_value(jz_main_bat.pdata->charg_stat_gpio))
jz_main_bat.bat_status = POWER_SUPPLY_STATUS_CHARGING;
else else
bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING; jz_main_bat.bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
dev_dbg(bat_ps->dev, "%s: battery status=%s\n", dev_dbg(bat_ps->dev, "%s: battery status=%s\n",
__func__, status_text[bat_status]); __func__, status_text[jz_main_bat.bat_status]);
if ((old_status != bat_status) || if ((old_status != jz_main_bat.bat_status) ||
(old_batt_vol - batt_vol > 50000)) { (old_batt_vol - batt_vol > 50000)) {
dev_dbg(bat_ps->dev, "%s %s -> %s\n", dev_dbg(bat_ps->dev, "%s %s -> %s\n",
bat_ps->name, bat_ps->name,
status_text[old_status], status_text[old_status],
status_text[bat_status]); status_text[jz_main_bat.bat_status]);
power_supply_changed(bat_ps); power_supply_changed(bat_ps);
} }
old_batt_vol = batt_vol; old_batt_vol = batt_vol;
mutex_unlock(&work_lock); err:
mutex_unlock(&jz_main_bat.work_lock);
} }
static enum power_supply_property jz_bat_main_props[] = { static enum power_supply_property jz_bat_main_props[] = {
@ -228,22 +251,22 @@ static void jz_bat_work(struct work_struct *work)
const int interval = HZ * 30; const int interval = HZ * 30;
jz_bat_update(&bat_ps); jz_bat_update(&bat_ps);
queue_delayed_work(monitor_wqueue, &bat_work, interval); queue_delayed_work(jz_main_bat.monitor_wqueue, &jz_main_bat.bat_work, interval);
} }
#ifdef CONFIG_PM #ifdef CONFIG_PM
static int jz_bat_suspend(struct platform_device *dev, pm_message_t state) static int jz_bat_suspend(struct platform_device *dev, pm_message_t state)
{ {
bat_status = POWER_SUPPLY_STATUS_UNKNOWN; jz_main_bat.bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
return 0; return 0;
} }
static int jz_bat_resume(struct platform_device *dev) static int jz_bat_resume(struct platform_device *dev)
{ {
bat_status = POWER_SUPPLY_STATUS_UNKNOWN; jz_main_bat.bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
cancel_delayed_work(&bat_work); cancel_delayed_work(&jz_main_bat.bat_work);
queue_delayed_work(monitor_wqueue, &bat_work, HZ/10); queue_delayed_work(jz_main_bat.monitor_wqueue, &jz_main_bat.bat_work, HZ/10);
return 0; return 0;
} }
@ -257,24 +280,24 @@ static int __devinit jz_bat_probe(struct platform_device *pdev)
int ret = 0; int ret = 0;
printk("JZ battery init.\n"); printk("JZ battery init.\n");
mutex_init(&work_lock); mutex_init(&jz_main_bat.work_lock);
INIT_DELAYED_WORK(&bat_work, jz_bat_work); INIT_DELAYED_WORK(&jz_main_bat.bat_work, jz_bat_work);
if (!pdev->dev.platform_data) { if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "Please set battery info\n"); dev_err(&pdev->dev, "Please set battery info\n");
return -EINVAL; return -EINVAL;
} }
pdata = pdev->dev.platform_data; jz_main_bat.pdata = pdev->dev.platform_data;
if (gpio_is_valid(pdata->dc_dect_gpio)) { if (gpio_is_valid(jz_main_bat.pdata->dc_dect_gpio)) {
ret = gpio_request(pdata->dc_dect_gpio, "AC/DC DECT"); ret = gpio_request(jz_main_bat.pdata->dc_dect_gpio, "AC/DC DECT");
if (ret) { if (ret) {
dev_err(&pdev->dev, "ac/dc dect gpio request failed.\n"); dev_err(&pdev->dev, "ac/dc dect gpio request failed.\n");
goto err_dc_gpio_request; goto err_dc_gpio_request;
} }
ret = gpio_direction_input(pdata->dc_dect_gpio); ret = gpio_direction_input(jz_main_bat.pdata->dc_dect_gpio);
if (ret) { if (ret) {
dev_err(&pdev->dev, "ac/dc dect gpio direction failed.\n"); dev_err(&pdev->dev, "ac/dc dect gpio direction failed.\n");
@ -282,30 +305,30 @@ static int __devinit jz_bat_probe(struct platform_device *pdev)
} }
} }
if (gpio_is_valid(pdata->usb_dect_gpio)) { if (gpio_is_valid(jz_main_bat.pdata->usb_dect_gpio)) {
ret = gpio_request(pdata->usb_dect_gpio, "USB DECT"); ret = gpio_request(jz_main_bat.pdata->usb_dect_gpio, "USB DECT");
if (ret) { if (ret) {
dev_err(&pdev->dev, "usb dect gpio request failed.\n"); dev_err(&pdev->dev, "usb dect gpio request failed.\n");
goto err_usb_gpio_request; goto err_usb_gpio_request;
} }
ret = gpio_direction_input(pdata->usb_dect_gpio); ret = gpio_direction_input(jz_main_bat.pdata->usb_dect_gpio);
if (ret) { if (ret) {
dev_err(&pdev->dev, "usb dect gpio set direction failed.\n"); dev_err(&pdev->dev, "usb dect gpio set direction failed.\n");
goto err_usb_gpio_direction; goto err_usb_gpio_direction;
} }
jz_gpio_disable_pullup(pdata->usb_dect_gpio); jz_gpio_disable_pullup(jz_main_bat.pdata->usb_dect_gpio);
/* TODO: Use generic gpio is better */ /* TODO: Use generic gpio is better */
} }
if (gpio_is_valid(pdata->charg_stat_gpio)) { if (gpio_is_valid(jz_main_bat.pdata->charg_stat_gpio)) {
ret = gpio_request(pdata->charg_stat_gpio, "CHARG STAT"); ret = gpio_request(jz_main_bat.pdata->charg_stat_gpio, "CHARG STAT");
if (ret) { if (ret) {
dev_err(&pdev->dev, "charger state gpio request failed.\n"); dev_err(&pdev->dev, "charger state gpio request failed.\n");
goto err_charg_gpio_request; goto err_charg_gpio_request;
} }
ret = gpio_direction_input(pdata->charg_stat_gpio); ret = gpio_direction_input(jz_main_bat.pdata->charg_stat_gpio);
if (ret) { if (ret) {
dev_err(&pdev->dev, "charger state gpio set direction failed.\n"); dev_err(&pdev->dev, "charger state gpio set direction failed.\n");
goto err_charg_gpio_direction; goto err_charg_gpio_direction;
@ -331,11 +354,11 @@ static int __devinit jz_bat_probe(struct platform_device *pdev)
} }
if (!ret) { if (!ret) {
monitor_wqueue = create_singlethread_workqueue("jz_battery"); jz_main_bat.monitor_wqueue = create_singlethread_workqueue("jz_battery");
if (!monitor_wqueue) { if (!jz_main_bat.monitor_wqueue) {
return -ESRCH; return -ESRCH;
} }
queue_delayed_work(monitor_wqueue, &bat_work, HZ * 1); queue_delayed_work(jz_main_bat.monitor_wqueue, &jz_main_bat.bat_work, HZ * 1);
} }
return ret; return ret;
@ -346,26 +369,26 @@ err_power_register_usb:
power_supply_unregister(&jz_ac); power_supply_unregister(&jz_ac);
err_power_register_ac: err_power_register_ac:
err_charg_gpio_direction: err_charg_gpio_direction:
gpio_free(pdata->charg_stat_gpio); gpio_free(jz_main_bat.pdata->charg_stat_gpio);
err_charg_gpio_request: err_charg_gpio_request:
err_usb_gpio_direction: err_usb_gpio_direction:
gpio_free(pdata->usb_dect_gpio); gpio_free(jz_main_bat.pdata->usb_dect_gpio);
err_usb_gpio_request: err_usb_gpio_request:
err_dc_gpio_direction: err_dc_gpio_direction:
gpio_free(pdata->dc_dect_gpio); gpio_free(jz_main_bat.pdata->dc_dect_gpio);
err_dc_gpio_request: err_dc_gpio_request:
return ret; return ret;
} }
static int __devexit jz_bat_remove(struct platform_device *dev) static int __devexit jz_bat_remove(struct platform_device *dev)
{ {
if (pdata) { if (jz_main_bat.pdata) {
if (gpio_is_valid(pdata->dc_dect_gpio)) if (gpio_is_valid(jz_main_bat.pdata->dc_dect_gpio))
gpio_free(pdata->dc_dect_gpio); gpio_free(jz_main_bat.pdata->dc_dect_gpio);
if (gpio_is_valid(pdata->usb_dect_gpio)) if (gpio_is_valid(jz_main_bat.pdata->usb_dect_gpio))
gpio_free(pdata->usb_dect_gpio); gpio_free(jz_main_bat.pdata->usb_dect_gpio);
if (gpio_is_valid(pdata->charg_stat_gpio)) if (gpio_is_valid(jz_main_bat.pdata->charg_stat_gpio))
gpio_free(pdata->charg_stat_gpio); gpio_free(jz_main_bat.pdata->charg_stat_gpio);
} }
power_supply_unregister(&bat_ps); power_supply_unregister(&bat_ps);