blob: 0a4ad5feb82e7817f7036f86c973d02b1dfecb9b [file] [log] [blame]
Takashi Iwaib317b032014-01-08 11:44:21 +01001/* 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
10static int (*led_set_func)(int, bool);
Takashi Iwaicf67c8e2014-01-14 14:56:55 +010011static void (*old_vmaster_hook)(void *, int);
Takashi Iwaib317b032014-01-08 11:44:21 +010012
13static 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
21static bool is_thinkpad(struct hda_codec *codec)
22{
23 bool found = false;
Takashi Iwai7639a062015-03-03 10:07:24 +010024 if (codec->core.subsystem_id >> 16 != 0x17aa)
Takashi Iwaib317b032014-01-08 11:44:21 +010025 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
32static void update_tpacpi_mute_led(void *private_data, int enabled)
33{
Takashi Iwaicf67c8e2014-01-14 14:56:55 +010034 if (old_vmaster_hook)
35 old_vmaster_hook(private_data, enabled);
Takashi Iwaib317b032014-01-08 11:44:21 +010036
37 if (led_set_func)
38 led_set_func(TPACPI_LED_MUTE, !enabled);
39}
40
41static void update_tpacpi_micmute_led(struct hda_codec *codec,
Takashi Iwai7fe30712014-01-30 17:59:02 +010042 struct snd_kcontrol *kcontrol,
Takashi Iwaib317b032014-01-08 11:44:21 +010043 struct snd_ctl_elem_value *ucontrol)
44{
45 if (!ucontrol || !led_set_func)
46 return;
47 if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
48 /* TODO: How do I verify if it's a mono or stereo here? */
49 bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1];
50 led_set_func(TPACPI_LED_MICMUTE, !val);
51 }
52}
53
54static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
55 const struct hda_fixup *fix, int action)
56{
57 struct hda_gen_spec *spec = codec->spec;
58 bool removefunc = false;
59
60 if (action == HDA_FIXUP_ACT_PROBE) {
61 if (!is_thinkpad(codec))
62 return;
63 if (!led_set_func)
64 led_set_func = symbol_request(tpacpi_led_set);
65 if (!led_set_func) {
Takashi Iwai4e76a882014-02-25 12:21:03 +010066 codec_warn(codec,
67 "Failed to find thinkpad-acpi symbol tpacpi_led_set\n");
Takashi Iwaib317b032014-01-08 11:44:21 +010068 return;
69 }
70
71 removefunc = true;
72 if (led_set_func(TPACPI_LED_MUTE, false) >= 0) {
Takashi Iwaicf67c8e2014-01-14 14:56:55 +010073 old_vmaster_hook = spec->vmaster_mute.hook;
Takashi Iwaib317b032014-01-08 11:44:21 +010074 spec->vmaster_mute.hook = update_tpacpi_mute_led;
75 removefunc = false;
76 }
77 if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) {
78 if (spec->num_adc_nids > 1)
Takashi Iwai4e76a882014-02-25 12:21:03 +010079 codec_dbg(codec,
80 "Skipping micmute LED control due to several ADCs");
Takashi Iwaib317b032014-01-08 11:44:21 +010081 else {
82 spec->cap_sync_hook = update_tpacpi_micmute_led;
83 removefunc = false;
84 }
85 }
86 }
87
88 if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
89 symbol_put(tpacpi_led_set);
90 led_set_func = NULL;
Takashi Iwaicf67c8e2014-01-14 14:56:55 +010091 old_vmaster_hook = NULL;
Takashi Iwaib317b032014-01-08 11:44:21 +010092 }
93}
94
95#else /* CONFIG_THINKPAD_ACPI */
96
97static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
98 const struct hda_fixup *fix, int action)
99{
100}
101
102#endif /* CONFIG_THINKPAD_ACPI */