projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b317b032 TI |
1 | /* Helper functions for Thinkpad LED control; |
| 2 | * to be included from codec driver | |
| 3 | */ | |
| 4 | ||
| 5 | #if IS_ENABLED(CONFIG_THINKPAD_ACPI) | |
| 6 | ||
| 7 | #include <linux/acpi.h> | |
| 8 | #include <linux/thinkpad_acpi.h> | |
| 9 | ||
| 10 | static int (*led_set_func)(int, bool); | |
| cf67c8e7 | 11 | static void (*old_vmaster_hook)(void *, int); |
| b317b032 TI |
12 | |
| 13 | static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context, | |
| 14 | void **rv) | |
| 15 | { | |
| 16 | bool *found = context; | |
| 17 | *found = true; | |
| 18 | return AE_OK; | |
| 19 | } | |
| 20 | ||
| 21 | static bool is_thinkpad(struct hda_codec *codec) | |
| 22 | { | |
| 23 | bool found = false; | |
| 24 | if (codec->subsystem_id >> 16 != 0x17aa) | |
| 25 | return false; | |
| 26 | if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found) | |
| 27 | return true; | |
| 28 | found = false; | |
| 29 | return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found; | |
| 30 | } | |
| 31 | ||
| 32 | static void update_tpacpi_mute_led(void *private_data, int enabled) | |
| 33 | { | |
| cf67c8e7 TI |
34 | if (old_vmaster_hook) |
| 35 | old_vmaster_hook(private_data, enabled); | |
| b317b032 TI |
36 | |
| 37 | if (led_set_func) | |
| 38 | led_set_func(TPACPI_LED_MUTE, !enabled); | |
| 39 | } | |
| 40 | ||
| 41 | static void update_tpacpi_micmute_led(struct hda_codec *codec, | |
| 42 | struct snd_ctl_elem_value *ucontrol) | |
| 43 | { | |
| 44 | if (!ucontrol || !led_set_func) | |
| 45 | return; | |
| 46 | if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) { | |
| 47 | /* TODO: How do I verify if it's a mono or stereo here? */ | |
| 48 | bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]; | |
| 49 | led_set_func(TPACPI_LED_MICMUTE, !val); | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, | |
| 54 | const struct hda_fixup *fix, int action) | |
| 55 | { | |
| 56 | struct hda_gen_spec *spec = codec->spec; | |
| 57 | bool removefunc = false; | |
| 58 | ||
| 59 | if (action == HDA_FIXUP_ACT_PROBE) { | |
| 60 | if (!is_thinkpad(codec)) | |
| 61 | return; | |
| 62 | if (!led_set_func) | |
| 63 | led_set_func = symbol_request(tpacpi_led_set); | |
| 64 | if (!led_set_func) { | |
| 65 | snd_printk(KERN_WARNING "Failed to find thinkpad-acpi symbol tpacpi_led_set\n"); | |
| 66 | return; | |
| 67 | } | |
| 68 | ||
| 69 | removefunc = true; | |
| 70 | if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { | |
| cf67c8e7 | 71 | old_vmaster_hook = spec->vmaster_mute.hook; |
| b317b032 TI |
72 | spec->vmaster_mute.hook = update_tpacpi_mute_led; |
| 73 | removefunc = false; | |
| 74 | } | |
| 75 | if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { | |
| 76 | if (spec->num_adc_nids > 1) | |
| 77 | snd_printdd("Skipping micmute LED control due to several ADCs"); | |
| 78 | else { | |
| 79 | spec->cap_sync_hook = update_tpacpi_micmute_led; | |
| 80 | removefunc = false; | |
| 81 | } | |
| 82 | } | |
| 83 | } | |
| 84 | ||
| 85 | if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) { | |
| 86 | symbol_put(tpacpi_led_set); | |
| 87 | led_set_func = NULL; | |
| cf67c8e7 | 88 | old_vmaster_hook = NULL; |
| b317b032 TI |
89 | } |
| 90 | } | |
| 91 | ||
| 92 | #else /* CONFIG_THINKPAD_ACPI */ | |
| 93 | ||
| 94 | static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, | |
| 95 | const struct hda_fixup *fix, int action) | |
| 96 | { | |
| 97 | } | |
| 98 | ||
| 99 | #endif /* CONFIG_THINKPAD_ACPI */ |