高通平台的耳机检测(msm8909)
记录高通msm8909耳机检测的机制，相关代码
kernel/arch/arm/boot/dts/qcom/msm8909-qrd-skuc.dtsi
sound {
compatible = "qcom,msm8x16-audio-codec";
qcom,model = "msm8909-skuc-snd-card";
qcom,msm-snd-card-id = <0>;
qcom,msm-codec-type = "internal";
qcom,msm-ext-pa = "primary";
qcom,msm-mclk-freq = <9600000>;
qcom,msm-mbhc-hphl-swh = <0>;
qcom,msm-mbhc-gnd-swh = <0>;
qcom,msm-hs-micbias-type = "internal";
qcom,msm-micbias1-ext-cap;
qcom,msm-micbias2-ext-cap;
qcom,audio-routing =
"RX_BIAS", "MCLK",
"SPK_RX_BIAS", "MCLK",
"INT_LDO_H", "MCLK",
"MIC BIAS Internal1", "Handset Mic",
"MIC BIAS Internal2", "Headset Mic",
"MIC BIAS Internal3", "Secondary Mic",
"AMIC1", "MIC BIAS Internal1",
"AMIC2", "MIC BIAS Internal2",
"AMIC3", "MIC BIAS Internal3";
pinctrl-names = "cdc_lines_act",
"cdc_lines_sus";
pinctrl-0 = <&cdc_pdm_lines_act>;
pinctrl-1 = <&cdc_pdm_lines_sus>;
asoc-platform = <&pcm0>, <&pcm1>, <&voip>, <&voice>,
<&loopback>, <&compress>, <&hostless>,
<&afe>, <&lsm>, <&routing>, <&lpa>,
<&voice_svc>;
asoc-platform-names = "msm-pcm-dsp.0", "msm-pcm-dsp.1",
"msm-voip-dsp", "msm-pcm-voice", "msm-pcm-loopback",
"msm-compress-dsp", "msm-pcm-hostless", "msm-pcm-afe",
"msm-lsm-client", "msm-pcm-routing", "msm-pcm-lpa",
"msm-voice-svc";
asoc-cpu = <&dai_pri_auxpcm>, <&dai_hdmi>,
<&dai_mi2s0>, <&dai_mi2s1>, <&dai_mi2s2>, <&dai_mi2s3>,
<&sb_0_rx>, <&sb_0_tx>, <&sb_1_rx>, <&sb_1_tx>,
<&sb_3_rx>, <&sb_3_tx>, <&sb_4_rx>, <&sb_4_tx>,
<&bt_sco_rx>, <&bt_sco_tx>, <&int_fm_rx>, <&int_fm_tx>,
<&afe_pcm_rx>, <&afe_pcm_tx>, <&afe_proxy_rx>, <&afe_proxy_tx>,
<&incall_record_rx>, <&incall_record_tx>, <&incall_music_rx>,
<&incall_music_2_rx>;
asoc-cpu-names = "msm-dai-q6-auxpcm.1", "msm-dai-q6-hdmi.8",
"msm-dai-q6-mi2s.0", "msm-dai-q6-mi2s.1",
"msm-dai-q6-mi2s.2", "msm-dai-q6-mi2s.3",
"msm-dai-q6-dev.16384", "msm-dai-q6-dev.16385",
"msm-dai-q6-dev.16386", "msm-dai-q6-dev.16387",
"msm-dai-q6-dev.16390", "msm-dai-q6-dev.16391",
"msm-dai-q6-dev.16392", "msm-dai-q6-dev.16393",
"msm-dai-q6-dev.12288", "msm-dai-q6-dev.12289",
"msm-dai-q6-dev.12292", "msm-dai-q6-dev.12293",
"msm-dai-q6-dev.224", "msm-dai-q6-dev.225",
"msm-dai-q6-dev.241", "msm-dai-q6-dev.240",
"msm-dai-q6-dev.32771", "msm-dai-q6-dev.32772",
"msm-dai-q6-dev.32773", "msm-dai-q6-dev.32770";
asoc-codec = <&stub_codec>, <&pm8909_conga_dig>;
asoc-codec-names = "msm-stub-codec.1", "tombak_codec";
};
kernel/arch/arm/boot/dts/qcom/msm-pm8909.dtsi
pm8909_conga_dig: 8909_wcd_codec@f000 {
compatible = "qcom,msm8x16_wcd_codec";
reg = <0xf000 0x100>;
interrupt-parent = <&spmi_bus>;
interrupts = <0x1 0xf0 0x0>,
<0x1 0xf0 0x1>,
<0x1 0xf0 0x2>,
<0x1 0xf0 0x3>,
<0x1 0xf0 0x4>,
<0x1 0xf0 0x5>,
<0x1 0xf0 0x6>,
<0x1 0xf0 0x7>;
interrupt-names = "spk_cnp_int",
"spk_clip_int",
"spk_ocp_int",
"ins_rem_det1",
"but_rel_det",
"but_press_det",
"ins_rem_det",
"mbhc_int";
cdc-vdda-cp-supply = <&pm8909_s2>;
qcom,cdc-vdda-cp-voltage = <1800000 2200000>;
qcom,cdc-vdda-cp-current = <500000>;
cdc-vdda-h-supply = <&pm8909_l5>;
qcom,cdc-vdda-h-voltage = <1800000 1800000>;
qcom,cdc-vdda-h-current = <10000>;
cdc-vdd-px-supply = <&pm8909_l5>;
qcom,cdc-vdd-px-voltage = <1800000 1800000>;
qcom,cdc-vdd-px-current = <5000>;
cdc-vdd-pa-supply = <&pm8909_s2>;
qcom,cdc-vdd-pa-voltage = <1800000 2200000>;
qcom,cdc-vdd-pa-current = <260000>;
cdc-vdd-mic-bias-supply = <&pm8909_l13>;
qcom,cdc-vdd-mic-bias-voltage = <3075000 3075000>;
qcom,cdc-vdd-mic-bias-current = <5000>;
qcom,cdc-mclk-clk-rate = <9600000>;
qcom,cdc-static-supplies = "cdc-vdda-h",
"cdc-vdd-px",
"cdc-vdd-pa",
"cdc-vdda-cp";
qcom,cdc-on-demand-supplies = "cdc-vdd-mic-bias";
};
pm8909_conga_analog: 8909_wcd_codec@f100 {
compatible = "qcom,msm8x16_wcd_codec";
reg = <0xf100 0x100>;
interrupt-parent = <&spmi_bus>;
interrupts = <0x1 0xf1 0x0>,
<0x1 0xf1 0x1>,
<0x1 0xf1 0x2>,
<0x1 0xf1 0x3>,
<0x1 0xf1 0x4>,
<0x1 0xf1 0x5>;
interrupt-names = "ear_ocp_int",
"hphr_ocp_int",
"hphl_ocp_det",
"ear_cnp_int",
"hphr_cnp_int",
"hphl_cnp_int";
};
msm8909的耳机接口在pm8909上
耳机的基本知识http://yunzhi.github.io/headset_knowledge
HPH (耳机简写headphone)
MIC_BIAS (耳机麦克风偏置电压)
MICx_IN(耳机的mic输入口)
HPH_L(耳机左声道)
HPH_R(耳机右声道)
HS_DET(耳机检测脚) headset_detect
HPH_REF(耳机参考地) 一些接耳机通道的外置PA,如果耳机地不接这里,接主板的地,可能通话过中会电流声
NC 常关耳机插座(hp_det和hph_l短路,插入耳机,hp_det和hph_l断路)
NO 常开耳机插座(这种类型常见,hp_det和hph_l断路,插入耳机,hph_l接了一个喇叭(小电阻)到地,相当有hp_det和hph_l短路)
耳机的左/右声道到地电阻大概10欧姆,mic到地大概1K欧姆
这里是no的耳机插座,设置
qcom,msm-mbhc-hphl-swh = <0>;
kernel/sound/soc/codecs/msm8x16-wcd.c
static const struct wcd_mbhc_intr intr_ids = {
.mbhc_sw_intr = MSM8X16_WCD_IRQ_MBHC_HS_DET,
.mbhc_btn_press_intr = MSM8X16_WCD_IRQ_MBHC_PRESS,
.mbhc_btn_release_intr = MSM8X16_WCD_IRQ_MBHC_RELEASE,
.mbhc_hs_ins_intr = MSM8X16_WCD_IRQ_MBHC_INSREM_DET1,
.mbhc_hs_rem_intr = MSM8X16_WCD_IRQ_MBHC_INSREM_DET,
.hph_left_ocp = MSM8X16_WCD_IRQ_HPHL_OCP,
.hph_right_ocp = MSM8X16_WCD_IRQ_HPHR_OCP,
};
static int msm8x16_wcd_codec_probe(struct snd_soc_codec *codec)
{
struct msm8x16_wcd_priv *msm8x16_wcd_priv;
struct msm8x16_wcd *msm8x16_wcd;
int i, ret;
dev_dbg(codec->dev, "%s()\n", __func__);
msm8x16_wcd_priv = kzalloc(sizeof(struct msm8x16_wcd_priv), GFP_KERNEL);
if (!msm8x16_wcd_priv) {
dev_err(codec->dev, "Failed to allocate private data\n");
return -ENOMEM;
}
for (i = 0; i < NUM_DECIMATORS; i++) {
tx_hpf_work[i].msm8x16_wcd = msm8x16_wcd_priv;
tx_hpf_work[i].decimator = i + 1;
INIT_DELAYED_WORK(&tx_hpf_work[i].dwork,
tx_hpf_corner_freq_callback);
}
codec->control_data = dev_get_drvdata(codec->dev);
snd_soc_codec_set_drvdata(codec, msm8x16_wcd_priv);
msm8x16_wcd_priv->codec = codec;
/* codec resmgr module init */
msm8x16_wcd = codec->control_data;
msm8x16_wcd->dig_base = ioremap(MSM8X16_DIGITAL_CODEC_BASE_ADDR,
MSM8X16_DIGITAL_CODEC_REG_SIZE);
if (msm8x16_wcd->dig_base == NULL) {
dev_err(codec->dev, "%s ioremap failed\n", __func__);
kfree(msm8x16_wcd_priv);
return -ENOMEM;
}
msm8x16_wcd_priv->spkdrv_reg =
wcd8x16_wcd_codec_find_regulator(codec->control_data,
MSM89XX_VDD_SPKDRV_NAME);
msm8x16_wcd_priv->pmic_rev = snd_soc_read(codec,
MSM8X16_WCD_A_DIGITAL_REVISION1);
msm8x16_wcd_priv->codec_version = snd_soc_read(codec,
MSM8X16_WCD_A_DIGITAL_PERPH_SUBTYPE);
if (msm8x16_wcd_priv->codec_version == CONGA) {
dev_dbg(codec->dev, "%s :Conga REV: %d\n", __func__,
msm8x16_wcd_priv->codec_version);
msm8x16_wcd_priv->ext_spk_boost_set = true;
} else {
dev_dbg(codec->dev, "%s :PMIC REV: %d\n", __func__,
msm8x16_wcd_priv->pmic_rev);
}
/*
* set to default boost option BOOST_SWITCH, user mixer path can change
* it to BOOST_ALWAYS or BOOST_BYPASS based on solution chosen.
*/
msm8x16_wcd_priv->boost_option = BOOST_SWITCH;
msm8x16_wcd_dt_parse_boost_info(codec);
msm8x16_wcd_set_boost_v(codec);
snd_soc_add_codec_controls(codec, impedance_detect_controls,
ARRAY_SIZE(impedance_detect_controls));
msm8x16_wcd_bringup(codec);
msm8x16_wcd_codec_init_reg(codec);
msm8x16_wcd_update_reg_defaults(codec);
wcd9xxx_spmi_set_codec(codec);
msm8x16_wcd_priv->on_demand_list[ON_DEMAND_MICBIAS].supply =
wcd8x16_wcd_codec_find_regulator(
codec->control_data,
on_demand_supply_name[ON_DEMAND_MICBIAS]);
atomic_set(&msm8x16_wcd_priv->on_demand_list[ON_DEMAND_MICBIAS].ref, 0);
BLOCKING_INIT_NOTIFIER_HEAD(&msm8x16_wcd_priv->notifier);
msm8x16_wcd_priv->fw_data = kzalloc(sizeof(*(msm8x16_wcd_priv->fw_data))
, GFP_KERNEL);
if (!msm8x16_wcd_priv->fw_data) {
dev_err(codec->dev, "Failed to allocate fw_data\n");
iounmap(msm8x16_wcd->dig_base);
kfree(msm8x16_wcd_priv);
return -ENOMEM;
}
set_bit(WCD9XXX_MBHC_CAL, msm8x16_wcd_priv->fw_data->cal_bit);
ret = wcd_cal_create_hwdep(msm8x16_wcd_priv->fw_data,
WCD9XXX_CODEC_HWDEP_NODE, codec);
if (ret < 0) {
dev_err(codec->dev, "%s hwdep failed %d\n", __func__, ret);
iounmap(msm8x16_wcd->dig_base);
kfree(msm8x16_wcd_priv->fw_data);
kfree(msm8x16_wcd_priv);
return ret;
}
wcd_mbhc_init(&msm8x16_wcd_priv->mbhc, codec, &mbhc_cb, &intr_ids,
true);
msm8x16_wcd_priv->mclk_enabled = false;
msm8x16_wcd_priv->clock_active = false;
msm8x16_wcd_priv->config_mode_active = false;
/* Set initial MICBIAS voltage level */
msm8x16_wcd_set_micb_v(codec);
/* Set initial cap mode */
msm8x16_wcd_configure_cap(codec, false, false);
registered_codec = codec;
modem_state_notifier =
subsys_notif_register_notifier("modem",
&modem_state_notifier_block);
if (!modem_state_notifier) {
dev_err(codec->dev, "Failed to register modem state notifier\n"
);
iounmap(msm8x16_wcd->dig_base);
kfree(msm8x16_wcd_priv->fw_data);
kfree(msm8x16_wcd_priv);
registered_codec = NULL;
return -ENOMEM;
}
return 0;
}
kernel/sound/soc/codecs/wcd-mbhc-v2.c
int wcd_mbhc_init(struct wcd_mbhc *mbhc, struct snd_soc_codec *codec,
const struct wcd_mbhc_cb *mbhc_cb,
const struct wcd_mbhc_intr *mbhc_cdc_intr_ids,
bool impedance_det_en)
{
int ret = 0;
int hph_swh = 0;
int gnd_swh = 0;
struct snd_soc_card *card = codec->card;
const char *hph_switch = "qcom,msm-mbhc-hphl-swh";
const char *gnd_switch = "qcom,msm-mbhc-gnd-swh";
fb_notifier.notifier_call = fb_notifierier_callback;
ret = fb_register_client(&fb_notifier);
if (ret)
printk( KERN_CRIT"%s: micbias Unable to register fb_notifier: %d\n", __func__,ret);
ret = of_property_read_u32(card->dev->of_node, hph_switch, &hph_swh);
if (ret) {
dev_err(card->dev,
"%s: missing %s in dt node\n", __func__, hph_switch);
goto err;
}
ret = of_property_read_u32(card->dev->of_node, gnd_switch, &gnd_swh);
if (ret) {
dev_err(card->dev,
"%s: missing %s in dt node\n", __func__, gnd_switch);
goto err;
}
mbhc->in_swch_irq_handler = false;
mbhc->current_plug = MBHC_PLUG_TYPE_NONE;
mbhc->is_btn_press = false;
mbhc->codec = codec;
mbhc->intr_ids = mbhc_cdc_intr_ids;
mbhc->impedance_detect = impedance_det_en;
mbhc->hphl_swh = hph_swh;
mbhc->gnd_swh = gnd_swh;
mbhc->micbias_enable = false;
mbhc->mbhc_cb = mbhc_cb;
mbhc->btn_press_intr = false;
mbhc->is_hs_recording = false;
mbhc->is_extn_cable = false;
mbhc->skip_imped_detection = false;
if (mbhc->intr_ids == NULL) {
pr_err("%s: Interrupt mapping not provided\n", __func__);
return -EINVAL;
}
if (mbhc->headset_jack.jack == NULL) {
ret = snd_soc_jack_new(codec, "Headset Jack",
WCD_MBHC_JACK_MASK, &mbhc->headset_jack);
if (ret) {
pr_err("%s: Failed to create new jack\n", __func__);
return ret;
}
ret = snd_soc_jack_new(codec, "Button Jack",
WCD_MBHC_JACK_BUTTON_MASK,
&mbhc->button_jack);
if (ret) {
pr_err("Failed to create new jack\n");
return ret;
}
ret = snd_jack_set_key(mbhc->button_jack.jack,
SND_JACK_BTN_0,
KEY_MEDIA);
if (ret) {
pr_err("%s: Failed to set code for btn-0\n",
__func__);
return ret;
}
ret = snd_jack_set_key(mbhc->button_jack.jack,
SND_JACK_BTN_1,
KEY_VOICECOMMAND);
if (ret) {
pr_err("%s: Failed to set code for btn-1:%d\n",
__func__, ret);
return ret;
}
ret = snd_jack_set_key(mbhc->button_jack.jack,
SND_JACK_BTN_2,
KEY_VOLUMEUP);
if (ret) {
pr_err("%s: Failed to set code for btn-2:%d\n",
__func__, ret);
return ret;
}
ret = snd_jack_set_key(mbhc->button_jack.jack,
SND_JACK_BTN_3,
KEY_VOLUMEDOWN);
if (ret) {
pr_err("%s: Failed to set code for btn-3:%d\n",
__func__, ret);
return ret;
}
INIT_DELAYED_WORK(&mbhc->mbhc_firmware_dwork,
wcd_mbhc_fw_read);
INIT_DELAYED_WORK(&mbhc->mbhc_btn_dwork, wcd_btn_lpress_fn);
}
/* Register event notifier */
mbhc->nblock.notifier_call = wcd_event_notify;
ret = msm8x16_register_notifier(codec, &mbhc->nblock);
if (ret) {
pr_err("%s: Failed to register notifier %d\n", __func__, ret);
return ret;
}
init_waitqueue_head(&mbhc->wait_btn_press);
mutex_init(&mbhc->codec_resource_lock);
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->mbhc_sw_intr,
wcd_mbhc_mech_plug_detect_irq,
"mbhc sw intr", mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d, ret = %d\n", __func__,
mbhc->intr_ids->mbhc_sw_intr, ret);
goto err_mbhc_sw_irq;
}
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->mbhc_btn_press_intr,
wcd_mbhc_btn_press_handler,
"Button Press detect",
mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->mbhc_btn_press_intr);
goto err_btn_press_irq;
}
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->mbhc_btn_release_intr,
wcd_mbhc_release_handler,
"Button Release detect", mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->mbhc_btn_release_intr);
goto err_btn_release_irq;
}
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->mbhc_hs_ins_intr,
wcd_mbhc_hs_ins_irq,
"Elect Insert", mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->mbhc_hs_ins_intr);
goto err_mbhc_hs_ins_irq;
}
wcd9xxx_spmi_disable_irq(mbhc->intr_ids->mbhc_hs_ins_intr);
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->mbhc_hs_rem_intr,
wcd_mbhc_hs_rem_irq,
"Elect Remove", mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->mbhc_hs_rem_intr);
goto err_mbhc_hs_rem_irq;
}
wcd9xxx_spmi_disable_irq(mbhc->intr_ids->mbhc_hs_rem_intr);
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->hph_left_ocp,
wcd_mbhc_hphl_ocp_irq, "HPH_L OCP detect",
mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->hph_left_ocp);
goto err_hphl_ocp_irq;
}
ret = wcd9xxx_spmi_request_irq(mbhc->intr_ids->hph_right_ocp,
wcd_mbhc_hphr_ocp_irq, "HPH_R OCP detect",
mbhc);
if (ret) {
pr_err("%s: Failed to request irq %d\n", __func__,
mbhc->intr_ids->hph_right_ocp);
goto err_hphr_ocp_irq;
}
pr_debug("%s: leave ret %d\n", __func__, ret);
return ret;
err_hphr_ocp_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->hph_left_ocp, mbhc);
err_hphl_ocp_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->mbhc_hs_rem_intr, mbhc);
err_mbhc_hs_rem_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->mbhc_hs_ins_intr, mbhc);
err_mbhc_hs_ins_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->mbhc_btn_release_intr, mbhc);
err_btn_release_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->mbhc_btn_press_intr, mbhc);
err_btn_press_irq:
wcd9xxx_spmi_free_irq(mbhc->intr_ids->mbhc_sw_intr, mbhc);
err_mbhc_sw_irq:
msm8x16_unregister_notifier(codec, &mbhc->nblock);
mutex_destroy(&mbhc->codec_resource_lock);
err:
pr_debug("%s: leave ret %d\n", __func__, ret);
return ret;
}
EXPORT_SYMBOL(wcd_mbhc_init);
耳机检测中断函数
static void wcd_mbhc_swch_irq_handler(struct wcd_mbhc *mbhc)
{
bool detection_type;
bool micbias1;
struct snd_soc_codec *codec = mbhc->codec;
pr_debug("%s: enter\n", __func__);
WCD_MBHC_RSC_LOCK(mbhc);
mbhc->in_swch_irq_handler = true;
/* cancel pending button press */
if (wcd_cancel_btn_work(mbhc))
pr_debug("%s: button press is canceled\n", __func__);
detection_type = (snd_soc_read(codec,
MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_1)) & 0x20;
/* Set the detection type appropriately */
snd_soc_update_bits(codec, MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_1,
0x20, (!detection_type << 5));
pr_debug("%s: mbhc->current_plug: %d detection_type: %d\n", __func__,
mbhc->current_plug, detection_type);
wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch);
micbias1 = (snd_soc_read(codec, MSM8X16_WCD_A_ANALOG_MICB_1_EN) & 0x80);
if ((mbhc->current_plug == MBHC_PLUG_TYPE_NONE) &&
detection_type) {
/* Make sure MASTER_BIAS_CTL is enabled */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MASTER_BIAS_CTL,
0x30, 0x30);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_1_EN,
0x04, 0x04);
if (!mbhc->mbhc_cfg->hs_ext_micbias)
/* Enable Tx2 RBias if the headset
* is using internal micbias*/
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_1_INT_RBIAS,
0x10, 0x10);
/* Remove pull down on MIC BIAS2 */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_2_EN,
0x20, 0x00);
/* Enable HW FSM */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_FSM_CTL,
0x80, 0x80);
/* Apply trim if needed on the device */
if (mbhc->mbhc_cb && mbhc->mbhc_cb->trim_btn_reg)
mbhc->mbhc_cb->trim_btn_reg(codec);
/* Enable external voltage source to micbias if present */
if (mbhc->mbhc_cb && mbhc->mbhc_cb->enable_mb_source)
mbhc->mbhc_cb->enable_mb_source(codec, true);
mbhc->btn_press_intr = false;
wcd_mbhc_detect_plug_type(mbhc);
} else if ((mbhc->current_plug != MBHC_PLUG_TYPE_NONE)
&& !detection_type) {
/* Disable external voltage source to micbias if present */
if (mbhc->mbhc_cb && mbhc->mbhc_cb->enable_mb_source)
mbhc->mbhc_cb->enable_mb_source(codec, false);
/* Disable HW FSM */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_FSM_CTL,
0xB0, 0x00);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_1_EN,
0x04, 0x00);
if (mbhc->mbhc_cb && mbhc->mbhc_cb->set_cap_mode)
mbhc->mbhc_cb->set_cap_mode(codec, micbias1, false);
mbhc->btn_press_intr = false;
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE) {
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADPHONE);
} else if (mbhc->current_plug == MBHC_PLUG_TYPE_GND_MIC_SWAP) {
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_UNSUPPORTED);
} else if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET) {
/* make sure to turn off Rbias */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_1_INT_RBIAS,
0x18, 0x08);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MICB_2_EN,
0x20, 0x20);
wcd9xxx_spmi_disable_irq(
mbhc->intr_ids->mbhc_hs_rem_intr);
wcd9xxx_spmi_disable_irq(
mbhc->intr_ids->mbhc_hs_ins_intr);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_1,
0x01, 0x01);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_2,
0x06, 0x00);
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADSET);
} else if (mbhc->current_plug == MBHC_PLUG_TYPE_HIGH_HPH) {
mbhc->is_extn_cable = false;
wcd9xxx_spmi_disable_irq(
mbhc->intr_ids->mbhc_hs_rem_intr);
wcd9xxx_spmi_disable_irq(
mbhc->intr_ids->mbhc_hs_ins_intr);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_1,
0x01, 0x01);
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_2,
0x06, 0x00);
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_LINEOUT);
}
} else if (!detection_type) {
/* Disable external voltage source to micbias if present */
if (mbhc->mbhc_cb && mbhc->mbhc_cb->enable_mb_source)
mbhc->mbhc_cb->enable_mb_source(codec, false);
/* Disable HW FSM */
snd_soc_update_bits(codec,
MSM8X16_WCD_A_ANALOG_MBHC_FSM_CTL,
0xB0, 0x00);
}
mbhc->in_swch_irq_handler = false;
WCD_MBHC_RSC_UNLOCK(mbhc);
pr_debug("%s: leave\n", __func__);
}
static irqreturn_t wcd_mbhc_mech_plug_detect_irq(int irq, void *data)
{
int r = IRQ_HANDLED;
struct wcd_mbhc *mbhc = data;
pr_debug("%s: enter\n", __func__);
if (unlikely(wcd9xxx_spmi_lock_sleep() == false)) {
pr_warn("%s: failed to hold suspend\n", __func__);
r = IRQ_NONE;
} else {
/* Call handler */
wcd_mbhc_swch_irq_handler(mbhc);
wcd9xxx_spmi_unlock_sleep();
}
pr_debug("%s: leave %d\n", __func__, r);
return r;
}
经过一系列的检测，判断是headset,headphones等，如果是headphones，最终通过wcd_mbhc_jack_report将数据汇报上去。
static void wcd_mbhc_jack_report(struct wcd_mbhc *mbhc,
struct snd_soc_jack *jack, int status, int mask)
{
snd_soc_jack_report_no_dapm(jack, status, mask);
}
内核通用的耳机汇报函数
void snd_soc_jack_report_no_dapm(struct snd_soc_jack *jack, int status,
int mask)
{
jack->status &= ~mask;
jack->status |= status & mask;
snd_jack_report(jack->jack, jack->status);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_report_no_dapm);
void snd_jack_report(struct snd_jack *jack, int status)
{
int i;
if (!jack)
return;
for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
int testbit = SND_JACK_BTN_0 >> i;
if (jack->type & testbit)
input_report_key(jack->input_dev, jack->key[i],
status & testbit);
}
for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
int testbit = 1 << i;
if (jack->type & testbit)
input_report_switch(jack->input_dev,
jack_switch_types[i],
status & testbit);
}//分别判断具体的位,有没有相应的事件
input_sync(jack->input_dev);
}
EXPORT_SYMBOL(snd_jack_report);
static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_SW, code, !!value);
}
#define EV_SW 0x05
三段耳机最终汇报上去的有效数据是
5 2 1 (插头类型 耳机信号 插入/拔出)
0 0 0（同步）
static int jack_switch_types[] = {
SW_HEADPHONE_INSERT,
SW_MICROPHONE_INSERT,
SW_LINEOUT_INSERT,
SW_JACK_PHYSICAL_INSERT,
SW_VIDEOOUT_INSERT,
SW_LINEIN_INSERT,
SW_HPHL_OVERCURRENT,
SW_HPHR_OVERCURRENT,
SW_UNSUPPORT_INSERT,
SW_MICROPHONE2_INSERT,
};
enum wcd_mbhc_plug_type {
MBHC_PLUG_TYPE_INVALID = -1,//无效设备
MBHC_PLUG_TYPE_NONE,//未接入设备
MBHC_PLUG_TYPE_HEADSET,//四段耳机
MBHC_PLUG_TYPE_HEADPHONE,//三段耳机
MBHC_PLUG_TYPE_HIGH_HPH,//高阻抗耳机
MBHC_PLUG_TYPE_GND_MIC_SWAP,//欧美标标志位
};
当然也可以手工通过sendevent 发送事件，systemui就能显示耳机接入的图标
getevent -i获取Headset Jack对应的input,假设是/dev/input/event2,
则可以通过如下方法模拟耳机接入和拔出(getevent -i找到具体的eventn)
sendevent /dev/input/event2 5 2 1
sendevent /dev/input/event2 0 0 0
或者拨出耳机
sendevent /dev/input/event2 5 2 0
sendevent /dev/input/event2 0 0 0
关于线控耳机原理可参考http://www.guokr.com/post/615349/
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