+static int check_mic_pin(struct hda_codec *codec, hda_nid_t nid,
+ hda_nid_t *fixed, hda_nid_t *ext)
+{
+ unsigned int cfg;
+
+ if (!nid)
+ return 0;
+ cfg = snd_hda_codec_get_pincfg(codec, nid);
+ switch (get_defcfg_connect(cfg)) {
+ case AC_JACK_PORT_FIXED:
+ if (*fixed)
+ return 1; /* already occupied */
+ *fixed = nid;
+ break;
+ case AC_JACK_PORT_COMPLEX:
+ if (*ext)
+ return 1; /* already occupied */
+ *ext = nid;
+ break;
+ }
+ return 0;
+}
+
+static int set_mic_route(struct hda_codec *codec,
+ struct sigmatel_mic_route *mic,
+ hda_nid_t pin)
+{
+ struct sigmatel_spec *spec = codec->spec;
+ struct auto_pin_cfg *cfg = &spec->autocfg;
+ int i;
+
+ mic->pin = pin;
+ for (i = AUTO_PIN_MIC; i <= AUTO_PIN_FRONT_MIC; i++)
+ if (pin == cfg->input_pins[i])
+ break;
+ if (i <= AUTO_PIN_FRONT_MIC) {
+ /* analog pin */
+ mic->dmux_idx = 0;
+ i = get_connection_index(codec, spec->mux_nids[0], pin);
+ if (i < 0)
+ return -1;
+ mic->mux_idx = i;
+ } else {
+ /* digital pin */
+ mic->mux_idx = 0;
+ i = get_connection_index(codec, spec->dmux_nids[0], pin);
+ if (i < 0)
+ return -1;
+ mic->dmux_idx = i;
+ }
+ return 0;
+}
+
+/* return non-zero if the device is for automatic mic switch */
+static int stac_check_auto_mic(struct hda_codec *codec)
+{
+ struct sigmatel_spec *spec = codec->spec;
+ struct auto_pin_cfg *cfg = &spec->autocfg;
+ hda_nid_t fixed, ext;
+ int i;
+
+ for (i = AUTO_PIN_LINE; i < AUTO_PIN_LAST; i++) {
+ if (cfg->input_pins[i])
+ return 0; /* must be exclusively mics */
+ }
+ fixed = ext = 0;
+ for (i = AUTO_PIN_MIC; i <= AUTO_PIN_FRONT_MIC; i++)
+ if (check_mic_pin(codec, cfg->input_pins[i], &fixed, &ext))
+ return 0;
+ for (i = 0; i < spec->num_dmics; i++)
+ if (check_mic_pin(codec, spec->dmic_nids[i], &fixed, &ext))
+ return 0;
+ if (!fixed || !ext)
+ return 0;
+ if (!(get_wcaps(codec, ext) & AC_WCAP_UNSOL_CAP))
+ return 0; /* no unsol support */
+ if (set_mic_route(codec, &spec->ext_mic, ext) ||
+ set_mic_route(codec, &spec->int_mic, fixed))
+ return 0; /* something is wrong */
+ return 1;
+}
+