/* * BQ27510 battery driver * * This package 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. * * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION "1.1.0" #define BQ27x00_REG_TEMP 0x06 #define BQ27x00_REG_VOLT 0x08 #define BQ27x00_REG_AI 0x14 #define BQ27x00_REG_FLAGS 0x0A #define BQ27x00_REG_TTE 0x16 #define BQ27x00_REG_TTF 0x18 #define BQ27x00_REG_TTECP 0x26 #define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */ #define BQ27500_REG_SOC 0x2c #define BQ27500_FLAG_DSC BIT(0) #define BQ27000_FLAG_CHGS BIT(8) #define BQ27500_FLAG_FC BIT(9) #define BQ27500_FLAG_OTD BIT(14) #define BQ27500_FLAG_OTC BIT(15) #define BQ27510_SPEED 300 * 1000 int virtual_battery_enable = 0; extern int dwc_vbus_status(void); static void bq27510_set(void); #if 0 #define DBG(x...) printk(KERN_INFO x) #else #define DBG(x...) do { } while (0) #endif /* If the system has several batteries we need a different name for each * of them... */ static DEFINE_MUTEX(battery_mutex); struct bq27510_device_info { struct device *dev; struct power_supply bat; struct power_supply ac; struct delayed_work work; struct i2c_client *client; unsigned int interval; unsigned int dc_check_pin; unsigned int bat_num; }; static struct bq27510_device_info *bq27510_di; static enum power_supply_property bq27510_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_HEALTH, //POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, //POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, //POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, }; static enum power_supply_property rk29_ac_props[] = { POWER_SUPPLY_PROP_ONLINE, }; static ssize_t battery_proc_write(struct file *file,const char __user *buffer, size_t count, loff_t *ppos) { char c; int rc; printk("USER:\n"); printk("echo x >/proc/driver/power\n"); printk("x=1,means just print log ||x=2,means log and data ||x= other,means close log\n"); rc = get_user(c,buffer); if(rc) return rc; //added by zwp,c='8' means check whether we need to download firmware to bq27xxx,return 0 means yes. if(c == '8'){ printk("%s,bq27510 need to download firmware\n",__FUNCTION__); } if(c == '1') virtual_battery_enable = 1; else if(c == '2') virtual_battery_enable = 2; else if(c == '3') virtual_battery_enable = 3; else if(c == '9'){ printk("%s:%d>>bq27510 set\n",__FUNCTION__,__LINE__); bq27510_set(); } else virtual_battery_enable = 0; printk("%s,count(%d),virtual_battery_enable(%d)\n",__FUNCTION__,(int)count,virtual_battery_enable); return count; } static const struct file_operations battery_proc_fops = { .owner = THIS_MODULE, .write = battery_proc_write, }; /* * Common code for BQ27510 devices read */ static int bq27510_read(struct i2c_client *client, u8 reg, u8 buf[], unsigned len) { int ret; ret = i2c_master_reg8_recv(client, reg, buf, len, BQ27510_SPEED); return ret; } static int bq27510_write(struct i2c_client *client, u8 reg, u8 const buf[], unsigned len) { int ret; ret = i2c_master_reg8_send(client, reg, buf, (int)len, BQ27510_SPEED); return ret; } /* * Return the battery temperature in tenths of degree Celsius * Or < 0 if something fails. */ static int bq27510_battery_temperature(struct bq27510_device_info *di) { int ret; int temp = 0; u8 buf[2]; #if defined (CONFIG_NO_BATTERY_IC) return 258; #endif if(virtual_battery_enable == 1) return 125/*258*/; ret = bq27510_read(di->client,BQ27x00_REG_TEMP,buf,2); if (ret<0) { dev_err(di->dev, "error reading temperature\n"); return ret; } temp = get_unaligned_le16(buf); temp = temp - 2731; DBG("Enter:%s %d--temp = %d\n",__FUNCTION__,__LINE__,temp); return temp; } /* * Return the battery Voltage in milivolts * Or < 0 if something fails. */ static int bq27510_battery_voltage(struct bq27510_device_info *di) { int ret; u8 buf[2]; int volt = 0; #if defined (CONFIG_NO_BATTERY_IC) return 4000000; #endif if(virtual_battery_enable == 1) return 2000000/*4000000*/; ret = bq27510_read(di->client,BQ27x00_REG_VOLT,buf,2); if (ret<0) { dev_err(di->dev, "error reading voltage\n"); return ret; } volt = get_unaligned_le16(buf); //bp27510 can only measure one li-lion bat if(di->bat_num == 2){ volt = volt * 1000 * 2; }else{ volt = volt * 1000; } DBG("Enter:%s %d--volt = %d\n",__FUNCTION__,__LINE__,volt); return volt; } /* * Return the battery average current * Note that current can be negative signed as well * Or 0 if something fails. */ static int bq27510_battery_current(struct bq27510_device_info *di) { int ret; int curr = 0; u8 buf[2]; #if defined (CONFIG_NO_BATTERY_IC) return 22000; #endif if(virtual_battery_enable == 1) return 11000/*22000*/; ret = bq27510_read(di->client,BQ27x00_REG_AI,buf,2); if (ret<0) { dev_err(di->dev, "error reading current\n"); return 0; } curr = get_unaligned_le16(buf); DBG("curr = %x \n",curr); if(curr>0x8000){ curr = 0xFFFF^(curr-1); } curr = curr * 1000; DBG("Enter:%s %d--curr = %d\n",__FUNCTION__,__LINE__,curr); return curr; } /* * Return the battery Relative State-of-Charge * Or < 0 if something fails. */ static int bq27510_battery_rsoc(struct bq27510_device_info *di) { int ret; int rsoc = 0; #if 0 int nvcap = 0,facap = 0,remcap=0,fccap=0,full=0,cnt=0; int art = 0, artte = 0, ai = 0, tte = 0, ttf = 0, si = 0; int stte = 0, mli = 0, mltte = 0, ae = 0, ap = 0, ttecp = 0, cc = 0; #endif u8 buf[2]; #if defined (CONFIG_NO_BATTERY_IC) return 100; #endif if(virtual_battery_enable == 1) return 50/*100*/; ret = bq27510_read(di->client,BQ27500_REG_SOC,buf,2); if (ret<0) { dev_err(di->dev, "error reading relative State-of-Charge\n"); return ret; } rsoc = get_unaligned_le16(buf); DBG("Enter:%s %d--rsoc = %d\n",__FUNCTION__,__LINE__,rsoc); #if defined (CONFIG_NO_BATTERY_IC) rsoc = 100; #endif #if 0 //other register information, for debug use ret = bq27510_read(di->client,0x0c,buf,2); //NominalAvailableCapacity nvcap = get_unaligned_le16(buf); DBG("\nEnter:%s %d--nvcap = %d\n",__FUNCTION__,__LINE__,nvcap); ret = bq27510_read(di->client,0x0e,buf,2); //FullAvailableCapacity facap = get_unaligned_le16(buf); DBG("Enter:%s %d--facap = %d\n",__FUNCTION__,__LINE__,facap); ret = bq27510_read(di->client,0x10,buf,2); //RemainingCapacity remcap = get_unaligned_le16(buf); DBG("Enter:%s %d--remcap = %d\n",__FUNCTION__,__LINE__,remcap); ret = bq27510_read(di->client,0x12,buf,2); //FullChargeCapacity fccap = get_unaligned_le16(buf); DBG("Enter:%s %d--fccap = %d\n",__FUNCTION__,__LINE__,fccap); ret = bq27510_read(di->client,0x3c,buf,2); //DesignCapacity full = get_unaligned_le16(buf); DBG("Enter:%s %d--DesignCapacity = %d\n",__FUNCTION__,__LINE__,full); buf[0] = 0x00; //CONTROL_STATUS buf[1] = 0x00; bq27510_write(di->client,0x00,buf,2); ret = bq27510_read(di->client,0x00,buf,2); cnt = get_unaligned_le16(buf); DBG("Enter:%s %d--Control status = %x\n",__FUNCTION__,__LINE__,cnt); ret = bq27510_read(di->client,0x02,buf,2); //AtRate art = get_unaligned_le16(buf); DBG("Enter:%s %d--AtRate = %d\n",__FUNCTION__,__LINE__,art); ret = bq27510_read(di->client,0x04,buf,2); //AtRateTimeToEmpty artte = get_unaligned_le16(buf); DBG("Enter:%s %d--AtRateTimeToEmpty = %d\n",__FUNCTION__,__LINE__,artte); ret = bq27510_read(di->client,0x14,buf,2); //AverageCurrent ai = get_unaligned_le16(buf); DBG("Enter:%s %d--AverageCurrent = %d\n",__FUNCTION__,__LINE__,ai); ret = bq27510_read(di->client,0x16,buf,2); //TimeToEmpty tte = get_unaligned_le16(buf); DBG("Enter:%s %d--TimeToEmpty = %d\n",__FUNCTION__,__LINE__,tte); ret = bq27510_read(di->client,0x18,buf,2); //TimeToFull ttf = get_unaligned_le16(buf); DBG("Enter:%s %d--TimeToFull = %d\n",__FUNCTION__,__LINE__,ttf); ret = bq27510_read(di->client,0x1a,buf,2); //StandbyCurrent si = get_unaligned_le16(buf); DBG("Enter:%s %d--StandbyCurrent = %d\n",__FUNCTION__,__LINE__,si); ret = bq27510_read(di->client,0x1c,buf,2); //StandbyTimeToEmpty stte = get_unaligned_le16(buf); DBG("Enter:%s %d--StandbyTimeToEmpty = %d\n",__FUNCTION__,__LINE__,stte); ret = bq27510_read(di->client,0x1e,buf,2); //MaxLoadCurrent mli = get_unaligned_le16(buf); DBG("Enter:%s %d--MaxLoadCurrent = %d\n",__FUNCTION__,__LINE__,mli); ret = bq27510_read(di->client,0x20,buf,2); //MaxLoadTimeToEmpty mltte = get_unaligned_le16(buf); DBG("Enter:%s %d--MaxLoadTimeToEmpty = %d\n",__FUNCTION__,__LINE__,mltte); ret = bq27510_read(di->client,0x22,buf,2); //AvailableEnergy ae = get_unaligned_le16(buf); DBG("Enter:%s %d--AvailableEnergy = %d\n",__FUNCTION__,__LINE__,ae); ret = bq27510_read(di->client,0x24,buf,2); //AveragePower ap = get_unaligned_le16(buf); DBG("Enter:%s %d--AveragePower = %d\n",__FUNCTION__,__LINE__,ap); ret = bq27510_read(di->client,0x26,buf,2); //TTEatConstantPower ttecp = get_unaligned_le16(buf); DBG("Enter:%s %d--TTEatConstantPower = %d\n",__FUNCTION__,__LINE__,ttecp); ret = bq27510_read(di->client,0x2a,buf,2); //CycleCount cc = get_unaligned_le16(buf); DBG("Enter:%s %d--CycleCount = %d\n",__FUNCTION__,__LINE__,cc); #endif return rsoc; } static int bq27510_battery_status(struct bq27510_device_info *di, union power_supply_propval *val) { u8 buf[2]; int flags = 0; int status; int ret; #if defined (CONFIG_NO_BATTERY_IC) val->intval = POWER_SUPPLY_STATUS_FULL; return 0; #endif if(virtual_battery_enable == 1) { val->intval = POWER_SUPPLY_STATUS_FULL; return 0; } ret = bq27510_read(di->client,BQ27x00_REG_FLAGS, buf, 2); if (ret < 0) { dev_err(di->dev, "error reading flags\n"); return ret; } flags = get_unaligned_le16(buf); DBG("Enter:%s %d--status = %x\n",__FUNCTION__,__LINE__,flags); if (flags & BQ27500_FLAG_FC) status = POWER_SUPPLY_STATUS_FULL; else if (flags & BQ27500_FLAG_DSC) status = POWER_SUPPLY_STATUS_DISCHARGING; else status = POWER_SUPPLY_STATUS_CHARGING; val->intval = status; return 0; } static int bq27510_health_status(struct bq27510_device_info *di, union power_supply_propval *val) { u8 buf[2]; int flags = 0; int status; int ret; #if defined (CONFIG_NO_BATTERY_IC) val->intval = POWER_SUPPLY_HEALTH_GOOD; return 0; #endif if(virtual_battery_enable == 1) { val->intval = POWER_SUPPLY_HEALTH_GOOD; return 0; } ret = bq27510_read(di->client,BQ27x00_REG_FLAGS, buf, 2); if (ret < 0) { dev_err(di->dev, "error reading flags\n"); return ret; } flags = get_unaligned_le16(buf); DBG("Enter:%s %d--status = %x\n",__FUNCTION__,__LINE__,flags); if ((flags & BQ27500_FLAG_OTD)||(flags & BQ27500_FLAG_OTC)) status = POWER_SUPPLY_HEALTH_OVERHEAT; else status = POWER_SUPPLY_HEALTH_GOOD; val->intval = status; return 0; } /* * Read a time register. * Return < 0 if something fails. */ static int bq27510_battery_time(struct bq27510_device_info *di, int reg, union power_supply_propval *val) { u8 buf[2]; int tval = 0; int ret; ret = bq27510_read(di->client,reg,buf,2); if (ret<0) { dev_err(di->dev, "error reading register %02x\n", reg); return ret; } tval = get_unaligned_le16(buf); DBG("Enter:%s %d--tval=%d\n",__FUNCTION__,__LINE__,tval); if (tval == 65535) return -ENODATA; val->intval = tval * 60; DBG("Enter:%s %d val->intval = %d\n",__FUNCTION__,__LINE__,val->intval); return 0; } #define to_bq27510_device_info(x) container_of((x), \ struct bq27510_device_info, bat); static int bq27510_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { int ret = 0; struct bq27510_device_info *di = to_bq27510_device_info(psy); DBG("Enter:%s %d psp= %d\n",__FUNCTION__,__LINE__,psp); switch (psp) { case POWER_SUPPLY_PROP_STATUS: ret = bq27510_battery_status(di, val); break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_PRESENT: val->intval = bq27510_battery_voltage(di); if (psp == POWER_SUPPLY_PROP_PRESENT) val->intval = val->intval <= 0 ? 0 : 1; break; case POWER_SUPPLY_PROP_CURRENT_NOW: val->intval = bq27510_battery_current(di); break; case POWER_SUPPLY_PROP_CAPACITY: val->intval = bq27510_battery_rsoc(di); break; case POWER_SUPPLY_PROP_TEMP: val->intval = bq27510_battery_temperature(di); break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_HEALTH: ret = bq27510_health_status(di, val); break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: ret = bq27510_battery_time(di, BQ27x00_REG_TTE, val); break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: ret = bq27510_battery_time(di, BQ27x00_REG_TTECP, val); break; case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: ret = bq27510_battery_time(di, BQ27x00_REG_TTF, val); break; default: return -EINVAL; } return ret; } static int rk29_ac_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { int ret = 0; struct bq27510_device_info *di = container_of(psy, struct bq27510_device_info, ac); switch (psp) { case POWER_SUPPLY_PROP_ONLINE: if (psy->type == POWER_SUPPLY_TYPE_MAINS){ if(gpio_get_value(di->dc_check_pin)) val->intval = 0; /*discharging*/ else val->intval = 1; /*charging*/ } DBG("%s:%d val->intval = %d\n",__FUNCTION__,__LINE__,val->intval); break; default: ret = -EINVAL; break; } return ret; } static void bq27510_powersupply_init(struct bq27510_device_info *di) { di->bat.type = POWER_SUPPLY_TYPE_BATTERY; di->bat.properties = bq27510_battery_props; di->bat.num_properties = ARRAY_SIZE(bq27510_battery_props); di->bat.get_property = bq27510_battery_get_property; di->ac.name = "ac"; di->ac.type = POWER_SUPPLY_TYPE_MAINS; di->ac.properties = rk29_ac_props; di->ac.num_properties = ARRAY_SIZE(rk29_ac_props); di->ac.get_property = rk29_ac_get_property; } static void bq27510_battery_update_status(struct bq27510_device_info *di) { power_supply_changed(&di->bat); } static void bq27510_battery_work(struct work_struct *work) { struct bq27510_device_info *di = container_of(work, struct bq27510_device_info, work.work); bq27510_battery_update_status(di); /* reschedule for the next time */ schedule_delayed_work(&di->work, di->interval); } static void bq27510_set(void) { struct bq27510_device_info *di; int i = 0; u8 buf[2]; di = bq27510_di; printk("enter 0x41\n"); buf[0] = 0x41; buf[1] = 0x00; bq27510_write(di->client,0x00,buf,2); msleep(1500); printk("enter 0x21\n"); buf[0] = 0x21; buf[1] = 0x00; bq27510_write(di->client,0x00,buf,2); buf[0] = 0; buf[1] = 0; bq27510_read(di->client,0x00,buf,2); // printk("%s: Enter:BUF[0]= 0X%x BUF[1] = 0X%x\n",__FUNCTION__,buf[0],buf[1]); while((buf[0] & 0x04)&&(i<5)) { printk("enter more 0x21 times i = %d\n",i); mdelay(1000); buf[0] = 0x21; buf[1] = 0x00; bq27510_write(di->client,0x00,buf,2); buf[0] = 0; buf[1] = 0; bq27510_read(di->client,0x00,buf,2); i++; } if(i>5) printk("write 0x21 error\n"); else printk("bq27510 write 0x21 success\n"); } static int bq27510_battery_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct bq27510_device_info *di; int retval = 0; struct bq27510_platform_data *pdata; pdata = client->dev.platform_data; di = kzalloc(sizeof(*di), GFP_KERNEL); if (!di) { dev_err(&client->dev, "failed to allocate device info data\n"); retval = -ENOMEM; goto batt_failed_2; } i2c_set_clientdata(client, di); di->dev = &client->dev; di->bat.name = "bq27510-battery"; di->client = client; /* 4 seconds between monotor runs interval */ di->interval = msecs_to_jiffies(4 * 1000); di->bat_num = pdata->bat_num; di->dc_check_pin = pdata->dc_check_pin; if (pdata->init_dc_check_pin) pdata->init_dc_check_pin( ); bq27510_powersupply_init(di); retval = power_supply_register(&client->dev, &di->bat); if (retval) { dev_err(&client->dev, "failed to register battery\n"); goto batt_failed_4; } bq27510_di = di; retval = power_supply_register(&client->dev, &di->ac); if (retval) { dev_err(&client->dev, "failed to register ac\n"); goto batt_failed_4; } INIT_DELAYED_WORK(&di->work, bq27510_battery_work); schedule_delayed_work(&di->work, di->interval); dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION); return 0; batt_failed_4: kfree(di); batt_failed_2: return retval; } static int bq27510_battery_remove(struct i2c_client *client) { struct bq27510_device_info *di = i2c_get_clientdata(client); power_supply_unregister(&di->bat); kfree(di->bat.name); kfree(di); return 0; } static const struct i2c_device_id bq27510_id[] = { { "bq27510", 0 }, }; static struct i2c_driver bq27510_battery_driver = { .driver = { .name = "bq27510", }, .probe = bq27510_battery_probe, .remove = bq27510_battery_remove, .id_table = bq27510_id, }; static int __init bq27510_battery_init(void) { int ret; struct proc_dir_entry * battery_proc_entry; ret = i2c_add_driver(&bq27510_battery_driver); if (ret) printk(KERN_ERR "Unable to register BQ27510 driver\n"); battery_proc_entry = proc_create("driver/power",0777,NULL,&battery_proc_fops); return ret; } module_init(bq27510_battery_init); static void __exit bq27510_battery_exit(void) { i2c_del_driver(&bq27510_battery_driver); } module_exit(bq27510_battery_exit); MODULE_AUTHOR("Rockchip"); MODULE_DESCRIPTION("BQ27510 battery monitor driver"); MODULE_LICENSE("GPL");