====== WM8960 Android tuning ======

==== resolve pop noise problem ====

<sxh c>
static void wm8960_work_func(struct work_struct *work)
{
    struct wm8960_private_data *pdata = NULL;
    struct snd_soc_codec *codec = NULL;
    int flag = -1;
    int status = SND_JACK_HEADPHONE;
    int jack_type = 0;

    pdata = container_of(work, struct wm8960_private_data, work);
    codec = (struct snd_soc_codec *)pdata->data;

    flag = wm8960_detect_hp();

    if(pdata->detect_flag != flag) {
        if(!use_antipop)
        {
            /* Enable anti pop mode */
            snd_soc_update_bits(codec, WM8960_APOP1,
                        WM8960_POBCTRL | WM8960_SOFT_ST |
                        WM8960_BUFDCOPEN,
                        WM8960_POBCTRL | WM8960_SOFT_ST |
                        WM8960_BUFDCOPEN);

            /* Enable VMID at 2*50k */
            snd_soc_update_bits(codec, WM8960_POWER1,
                        WM8960_VMID_MASK, 0x80);

            /* Ramp */
            msleep(100);

            /* Enable VREF */
            snd_soc_update_bits(codec, WM8960_POWER1,
                        WM8960_VREF, WM8960_VREF);

            msleep(100);

        }
        if (flag == 1) {
#ifdef CONFIG_V2_HDMI_AUDIO
            printk(KERN_INFO "wm8960 hp pluged\n");

            /* Speaker */
            snd_soc_update_bits(codec, WM8960_LOUT2, 0x7f, 0x0);
            snd_soc_update_bits(codec, WM8960_ROUT2, 0x7f, 0x0);
            /* Headphone */
            snd_soc_update_bits(codec, WM8960_LOUT1, 0x7f, 0x7f);
            snd_soc_update_bits(codec, WM8960_ROUT1, 0x7f, 0x7f);

            /* DAC Mono Mix clear */
            snd_soc_update_bits(codec, WM8960_ADDCTL1, 1 << 4, 0);
            printk(" 1 === USYS_KKJ clear DAC Mono ===\n");

            /* jack report */
            snd_soc_jack_report(&pdata->jack, status, SND_JACK_HEADSET);
#else
            snd_soc_update_bits(codec, WM8960_POWER1, 2, 2);
            msleep(100);
            jack_type = wm8960_detect_hp();
            if(jack_type == 1){
                printk("wm8960 3 ports hp pluged\n");
                /* jack report */
                snd_soc_jack_report(&pdata->jack, SND_JACK_HEADPHONE, SND_JACK_HEADPHONE);
                switch_set_state(&pdata->sdev, 2);
            }else{
                printk("wm8960 4 ports hs pluged\n");
                /* jack report */
                snd_soc_jack_report(&pdata->jack, status, SND_JACK_HEADSET);
                switch_set_state(&pdata->sdev, 1);
            }
#endif
        } else {
            printk(KERN_INFO "wm8960 hp unpluged\n");
#ifdef CONFIG_V2_HDMI_AUDIO
            /* Speaker */
            snd_soc_update_bits(codec, WM8960_LOUT2, 0x7f, 0x7f);
            snd_soc_update_bits(codec, WM8960_ROUT2, 0x7f, 0x7f);
            /* Headphone */
            snd_soc_update_bits(codec, WM8960_LOUT1, 0x7f, 0x0);
            snd_soc_update_bits(codec, WM8960_ROUT1, 0x7f, 0x0);

            /* DAC Mono Mix set */
            snd_soc_update_bits(codec, WM8960_ADDCTL1, 1 << 4, 1 << 4);
            printk(" 1 === USYS_KKJ set DAC Mono ===\n");
#else
#if 0
            /* Speaker */
            snd_soc_update_bits(codec, WM8960_LOUT2, 0x70, 0x70);
            snd_soc_update_bits(codec, WM8960_ROUT2, 0x70, 0x70);
            /* Headphone */
            snd_soc_update_bits(codec, WM8960_LOUT1, 0x70, 0);
            snd_soc_update_bits(codec, WM8960_ROUT1, 0x70, 0);

            /* DAC Mono Mix set */
            snd_soc_update_bits(codec, WM8960_ADDCTL1, 1 << 4, 1 << 4);
#endif

            switch_set_state(&pdata->sdev, 0);
#endif
            /* jack report */
            snd_soc_jack_report(&pdata->jack, 0, SND_JACK_HEADSET);
        }

        pdata->detect_flag = flag;
        if(!use_antipop)
        {

            /* Disable VMID and VREF */
            snd_soc_update_bits(codec, WM8960_POWER1,
                        WM8960_VREF | WM8960_VMID_MASK, 0);

            /* Disable HP discharge */
            snd_soc_update_bits(codec, WM8960_APOP2,
                        WM8960_DISOP | WM8960_DRES_MASK,
                        0);

            /* Disable anti-pop features */
            snd_soc_update_bits(codec, WM8960_APOP1,
                        WM8960_POBCTRL | WM8960_SOFT_ST |
                        WM8960_BUFDCOPEN,
                        WM8960_POBCTRL | WM8960_SOFT_ST |
                        WM8960_BUFDCOPEN);

            use_antipop = 1;
        }
    }

}
</sxh>