1. repo init -u git://review.sonyericsson.net/platform/manifest -b volatile-jb-mr1-yangtze
2. https://wiki.sonyericsson.net/androiki/CN3-II/Bringup_Trail_FC34 如何编译 3. https://wiki.sonyericsson.net/androiki/PLD_CM/Yangtze 如何编译和flash 4. https://wiki.sonyericsson.net/androiki/MIB_Tokyo/Rhine/Hardware_Watchdog_debugging 小技巧： MISCTA 2473控制kernel log输出： 01 输出，00 无输出 repo sync [目录路径] 比如： kenel,system/vold repo sync kernel 则只是同步kernel目录下的代码 grep "ifelse" * -r 在当前目录下(递归)搜索所有文件ifelse的内容 owner:xiaoguang2.lu@sonymobile.com status:merged //查找谁提交并且已经merged的gerrit printk("func = %pf",func)可打印函数名称 充电缩写:(acronym) FSM: Finite State Machine CC: Coulcomb Counter FCC: Full Charge Capacity OCV: Open Circuit Voltage PMIC: Power Management IC PC: Percentage Charge RC: Remaining Charge SOC: State of Charge RUC: Remaining Usable Charge UUC: Unusable Charge 一、DTS 学习 1. kernel/arch/arm/boot/dts 目录下包含所有的dts. a. board , msm8226.dtsi b. pmic, msm-pm8226.dtsi 2. kernel/Androidkernel.mk; Android makefile to build kernel as a part of Android Build 3. kernel/arch/arm/configs 目录下保存对应的config定义， CONFIG_XXXXXX 4. 可参考 jb-mr1-rhine/kernel/arch/arm/boot/dts/msm8974-rhine_togari_row.dtsi 二、LCD Porting 1. http://review.sonyericsson.net/#/c/508903 三、Charger bringup 1. 和battery and hw guys 确定相关 硬件参数 2. http://review.sonyericsson.net/#/c/516297/ 3. kernel 发送给battery_logging的uevent格式？ power_supply_uevent@kernel/drivers/power/power_supply_sysfs.c 该函数添加发送的信息到uevent ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name); //psy->name="battery" for (j = 0; j < psy->num_properties; j++) { attr = &power_supply_attrs[psy->properties[j]]; //得到对应的power supply attr, attrname = kstruprdup(attr->attr.name, GFP_KERNEL);//会把属性名字转成大写，比如“status”->"STATUS" ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf); //增加该属性的信息到uevent buffer中 } qpnp_charger_probe@kernel/drivers/power/qpnp-charger.c中会定义"battery"的properties = msm_batt_power_props static enum power_supply_property msm_batt_power_props[] = { //对应power_supply_attrs[]@kernel/drivers/power/power_supply_sysfs.c POWER_SUPPLY_PROP_CHARGING_ENABLED, //表示这些属性是被battery psy所需要的属性,具体如何得到可查看 POWER_SUPPLY_PROP_STATUS, //qpnp_batt_power_get_property 函数 POWER_SUPPLY_PROP_CHARGE_TYPE, //这些属性会添加到/sys/class/power_supply/battery POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_SYSTEM_TEMP_LEVEL, }; static struct device_attribute power_supply_attrs[] = { /* Properties of type `int' */ POWER_SUPPLY_ATTR(status), //表示attr.name = "status" POWER_SUPPLY_ATTR(charge_type), ... } 4. parse_uevent@vendor/semc/hardware/power/charge-log/battery_logging/battery_logging.c会分析从kernel传上来的power uevent格式 发送该uevent的path '\0' POWER_SUPPLY_NAME=battery '\0' POWER_SUPPLY_CHARGING_ENABLE=%d '\0' POWER_SUPPLY_CHARGING_STATUS=%d '\0' ... 5. 顺便分析下UEvent如何传递给user space? a. @kernel/drivers/power/qpnp-charger.c中只要有任何关于charger的变化，比如charger的各种irq handler b. @kernel/drivers/power/qpnp-bms.c中calculate_soc_from_voltage和calculate_state_of_charge c. @kernel/arch/arm/boot/dts/msm-pm8226.dtsi中有pm8226_bms的device定义，msm8226-cn3ii.dtsi中有pm8226_bms的定义补充 其中没有 qcom,use-voltage-soc 的定义所以chip->use_voltage_soc=false, 也就是只用calculate_state_of_charge计算soc 顺便chip->use_external_rsense=true,表示用外部的rsense. d. @kernel/driver/power/power_supply_core.c中的power_supply_changed会被以上内容调用 schedule_work(&psy->changed_work); e. power_supply_changed_work@kernel/driver/power/power_supply_core.c kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE); //action=KOBJ_CHANGE f. kobject_uevent_env@kernel/lib/kobject_uevent.c static const char *kobject_actions[] = { [KOBJ_ADD] = "add", [KOBJ_REMOVE] = "remove", [KOBJ_CHANGE] = "change", [KOBJ_MOVE] = "move", [KOBJ_ONLINE] = "online", [KOBJ_OFFLINE] = "offline", }; 以下为添加到uevent buffer中发送的内容 /* default keys */ retval = add_uevent_var(env, "ACTION=%s", action_string);//action_string="change" retval = add_uevent_var(env, "DEVPATH=%s", devpath);//devpath = kobject_get_path(kobj, GFP_KERNEL); retval = add_uevent_var(env, "SUBSYSTEM=%s", subsystem);//也就是uevent 的name retval = uevent_ops->uevent(kset, kobj, env); //会调用到power_supply_uevent@kernel/drivers/power/power_supply_sysfs.c //也就是会添加具体的power battery信息到uevent buffer中了 retval = add_uevent_var(env, "SEQNUM=%llu", (unsigned long long)++uevent_seqnum); //增加uevent发送的计数， //KERNEL_ATTR_RO(uevent_seqnum); 用cat sys/kernel/uevent_seqnum 可以查看 CONFIG_NET=y被定义，以下代码是发送uevent到userspace 的关键代码 #if defined(CONFIG_NET) /* send netlink message */ list_for_each_entry(ue_sk, &uevent_sock_list, list) { //uevent_net_init会初始化一个uevent_sock，也只有一个 if (!netlink_has_listeners(uevent_sock, 1)) continue; /* allocate message with the maximum possible size */ len = strlen(action_string) + strlen(devpath) + 2; skb = alloc_skb(len + env->buflen, GFP_KERNEL); if (skb) { retval = netlink_broadcast_filtered(uevent_sock, skb, 0, 1, GFP_KERNEL, kobj_bcast_filter, kobj); } else retval = -ENOMEM; } #endif 6. Battery充满的识别 1). @kernel/arch/arm/boot/dts/msm-pm8226.dtsi和msm8226-cn3ii.dtsi qcom,chg-chgr@1000 { status = "disabled"; reg = <0x1000 0x100>; interrupts = <0x0 0x10 0x0>, <0x0 0x10 0x1>, <0x0 0x10 0x2>, <0x0 0x10 0x3>, <0x0 0x10 0x4>, <0x0 0x10 0x5>, <0x0 0x10 0x6>, <0x0 0x10 0x7>; //具体的含义？ interrupt-names = "vbat-det-lo", "vbat-det-hi", "chgwdog", "state-change", "trkl-chg-on", "fast-chg-on", "chg-failed", "chg-done"; }; 2). qpnp_chg_hwinit@kernel/drivers/power chip->chg_done_irq = spmi_get_irq_byname(chip->spmi,spmi_resource, "chg-done"); 如何触发"chg-done"这个interrupt? 3).获取当前充电状态 rc = qpnp_chg_read(chip, &chgr_sts,INT_RT_STS(chip->chgr_base), 1); 如果chgr_sts&CHG_DONE_IRQ == 1则表示充电完成 4).http://review.sonyericsson.net/#/c/480849, workaround for fake charge done 6. 如何查看当前的charger信息？ /sys/devices/qpnp-charger-eab16c00 7. 手机/sys/class/power_supply/battery和bms和usb的来源 1)qpnp_charger_proble@kernel/drivers/power/qpnp-charger.c if (chip->bat_if_base){ chip->batt_psy.name = "battery"; chip->batt_psy.type = POWER_SUPPLY_TYPE_BATTERY; chip->batt_psy.properties = msm_batt_power_props;//所选择的属性 rc = power_supply_register(chip->dev, &chip->batt_psy);//注册到/sys/class/power_supply/battery } 2)qpnp_bms_probe@kernel/drivers/power/qpnp-bms.c chip->bms_psy.name = "bms"; chip->bms_psy.type = POWER_SUPPLY_TYPE_BMS; chip->bms_psy.properties = msm_bms_power_props; rc = power_supply_register(chip->dev, &chip->bms_psy);//注册到/sys/class/power_supply/bms 3)msm_otg_proble@kernel/drivers/usb/otg, 注意CONFIG_USB_MSM_OTG的定义在kernel/drivers/usb/gadget/Kconfig: config USB_CI13XXX_MSM-->select USB_MSM_OTG motg->usb_psy.name = "usb"; motg->usb_psy.type = POWER_SUPPLY_TYPE_USB; motg->usb_psy.supplied_to = otg_pm_power_supplied_to; msm_otg_register_power_supply(pdev, motg))->power_supply_register(&pdev->dev, &motg->usb_psy); 4)充电器的识别过程 msm_chg_detect_work@kernel/drivers/usb/otg/msm_otg.c 主要完成充电器类别的识别过程 ->msm_otg_notify_chg_type@msm_otg.c ->power_supply_set_supply_type(psy, charger_type)@msm_otg.c;//psy=motg->usb_psy ->psy->set_property(psy, POWER_SUPPLY_PROP_TYPE,&ret); //@kernel/drivers/power/power_supply_core.c, 最后会call ->otg_power_set_property_usb@msm_otg.c 但是该函数中没有POWER_SUPPLY_PROP_TYPE属性的设置？？ ->queue_work(system_nrt_wq, &motg->sm_work);->msm_otg_sm_work[otg->phy->state=OTG_STATE_B_IDLE] -->msm_otg_notify_charger->msm_otg_notify_power_supply->power_supply_set_online//设置是否online 四、Audio Jack Porting 0. HW Guys: Wang, Junchao(9601), Liu,Xun 1. kernel/sound/soc/msm/msm8226.c; kernel/sound/soc/codecs/wcd9306.c,Wcd9xxx-mbhc.c tapan_slimbus_irq 2. adb shell 'echo -n "file wcd9xxx-mbhc.c +p" > /sys/kernel/debug/dynamic_debug/control' 3. wcd9xxx_insert_detect_setup@Wcd9xxx-mbhc.c 0x6c-->0x68 //参考80-NC836-2 WCD9306 AUDIO CODEC SOFTWARE INTERFACE.pdf 中0x14B MBHC_INSERT_DET_STATUS寄存器的说明，PLUG_TYPE 0:NC 1:NO （注意原来的文档有错） Audio Jack不插入耳机时MBHC_HSDET是低，插入耳机时MBHC_HSDET是高，所以是Normal Close(NC)类型的Audio Jack 4. @kernel/sound/soc/msm/msm8226.c; S(v_no_mic, 30); S(v_hs_max, 1650); 5. @kernel/sound/soc/codecs/Wcd9xxx-mbhc.c wcd9xxx_codec_get_plug_type-> wcd9xxx_find_plug_type 6. Audio jack检测耳机的流程 在函数wcd9xxx_mbhc_decide_swch_plug中如果检测到是headset则不重复多次检测，如果是headphone则需要 wcd9xxx_schedule_hs_detect_plug(mbhc,&mbhc->correct_plug_swch);启动重复检测以确认正确 插入headphone耳机 <7>[ 105.233608] wcd9xxx_mech_plug_detect_irq: enter <7>[ 105.233625] wcd9xxx_swch_irq_handler: enter <7>[ 105.238692] wcd9xxx_swch_irq_handler: Acquiring BCL <7>[ 105.238706] wcd9xxx_swch_irq_handler: Acquiring BCL done <7>[ 105.238864] wcd9xxx_swch_irq_handler: Current plug type 0, insert 1 <7>[ 105.238876] wcd9xxx_cancel_hs_detect_plug: Canceling correct_plug_swch <7>[ 105.238885] wcd9xxx_cancel_hs_detect_plug: Release BCL <7>[ 105.238897] wcd9xxx_cancel_hs_detect_plug: Acquiring BCL <7>[ 105.238907] wcd9xxx_cancel_hs_detect_plug: Acquiring BCL done <7>[ 105.239014] wcd9xxx_mbhc_detect_plug_type: enter <7>[ 105.497933] wcd9xxx_mbhc_decide_swch_plug: enter <7>[ 105.498378] wcd9xxx_codec_get_plug_type: enter <7>[ 105.501350] wcd9xxx_mbhc_setup_hs_polling: enter ... <7>[ 105.590299] wcd9xxx_find_plug_type: DCE #0, fc06, V 0008(0008), GND 0, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.590317] wcd9xxx_find_plug_type: DCE #1, fc06, V 0008(0008), GND 0, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.590332] wcd9xxx_find_plug_type: DCE #2, fc06, V 0008(0008), GND 1, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.590346] wcd9xxx_find_plug_type: DCE #3, fc06, V 0008(0008), GND 0, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.590359] wcd9xxx_find_plug_type: Plug type 2 detected <7>[ 105.590368] wcd9xxx_codec_get_plug_type: leave <7>[ 105.590655] wcd9xxx_report_plug: enter insertion 1 hph_status 0 <7>[ 105.590666] wcd9xxx_report_plug: Reporting insertion 1(1) 继续进行检测wcd9xxx_correct_swch_plug，用以确认检测正确，如果检测到是PLUG_TYPE_HEADPHONE则需要在 HS_DETECT_PLUG_TIME_MS＝5000毫秒内多次检测 <7>[ 105.717321] wcd9xxx_correct_swch_plug: Acquiring BCL <7>[ 105.717335] wcd9xxx_correct_swch_plug: Acquiring BCL done <7>[ 105.717344] wcd9xxx_codec_get_plug_type: enter <7>[ 105.720967] wcd9xxx_mbhc_setup_hs_polling: enter <7>[ 105.804823] wcd9xxx_find_plug_type: DCE #0, fc08, V 0010(0010), GND 0, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.804841] wcd9xxx_find_plug_type: DCE #1, fc08, V 0010(0010), GND 0, VDDIO 0, HPHL 1 TYPE 2 <7>[ 105.804856] wcd9xxx_find_plug_type: DCE #2, fc08, V 0010(0010), GND 1, VDDIO 0, HPHL 1 TYPE 2 标签： 105e电阻