ASoC: cs42l42: Report jack and button detection

Report the Jack events to the user space through ALSA.
Also moves request_threaded_irq() to component_probe so it don't get
interrupts before the initialization the struct snd_soc_jack.

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210306185553.62053-12-tanureal@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index b508468..594bf22 100644 (file)
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -522,10 +522,18 @@ static int cs42l42_component_probe(struct snd_soc_component *component)
 {
        struct cs42l42_private *cs42l42 =
                (struct cs42l42_private *)snd_soc_component_get_drvdata(component);
+       struct snd_soc_card *crd = component->card;
+       int ret = 0;
 
        cs42l42->component = component;
 
-       return 0;
+       ret = snd_soc_card_jack_new(crd, "CS42L42 Headset", SND_JACK_HEADSET | SND_JACK_BTN_0 |
+                                   SND_JACK_BTN_1 | SND_JACK_BTN_2 | SND_JACK_BTN_3,
+                                   &cs42l42->jack, NULL, 0);
+       if (ret < 0)
+               dev_err(component->dev, "Cannot create CS42L42 Headset: %d\n", ret);
+
+       return ret;
 }
 
 static const struct snd_soc_component_driver soc_component_dev_cs42l42 = {
@@ -1198,7 +1206,7 @@ static void cs42l42_cancel_hs_type_detect(struct cs42l42_private *cs42l42)
                                (3 << CS42L42_HSDET_AUTO_TIME_SHIFT));
 }
 
-static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
+static int cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
 {
        int bias_level;
        unsigned int detect_status;
@@ -1241,17 +1249,24 @@ static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
 
        switch (bias_level) {
        case 1: /* Function C button press */
+               bias_level = SND_JACK_BTN_2;
                dev_dbg(cs42l42->component->dev, "Function C button press\n");
                break;
        case 2: /* Function B button press */
+               bias_level = SND_JACK_BTN_1;
                dev_dbg(cs42l42->component->dev, "Function B button press\n");
                break;
        case 3: /* Function D button press */
+               bias_level = SND_JACK_BTN_3;
                dev_dbg(cs42l42->component->dev, "Function D button press\n");
                break;
        case 4: /* Function A button press */
+               bias_level = SND_JACK_BTN_0;
                dev_dbg(cs42l42->component->dev, "Function A button press\n");
                break;
+       default:
+               bias_level = 0;
+               break;
        }
 
        /* Set button detect level sensitivity back to default */
@@ -1281,6 +1296,8 @@ static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
                (0 << CS42L42_M_HSBIAS_HIZ_SHIFT) |
                (1 << CS42L42_M_SHORT_RLS_SHIFT) |
                (1 << CS42L42_M_SHORT_DET_SHIFT));
+
+       return bias_level;
 }
 
 struct cs42l42_irq_params {
@@ -1325,6 +1342,8 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
        unsigned int current_plug_status;
        unsigned int current_button_status;
        unsigned int i;
+       int report = 0;
+
 
        /* Read sticky registers to clear interurpt */
        for (i = 0; i < ARRAY_SIZE(stickies); i++) {
@@ -1351,9 +1370,20 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
        if ((~masks[5]) & irq_params_table[5].mask) {
                if (stickies[5] & CS42L42_HSDET_AUTO_DONE_MASK) {
                        cs42l42_process_hs_type_detect(cs42l42);
-                       dev_dbg(component->dev,
-                               "Auto detect done (%d)\n",
-                               cs42l42->hs_type);
+                       switch(cs42l42->hs_type){
+                       case CS42L42_PLUG_CTIA:
+                       case CS42L42_PLUG_OMTP:
+                               snd_soc_jack_report(&cs42l42->jack, SND_JACK_HEADSET,
+                                                   SND_JACK_HEADSET);
+                               break;
+                       case CS42L42_PLUG_HEADPHONE:
+                               snd_soc_jack_report(&cs42l42->jack, SND_JACK_HEADPHONE,
+                                                   SND_JACK_HEADPHONE);
+                               break;
+                       default:
+                               break;
+                       }
+                       dev_dbg(component->dev, "Auto detect done (%d)\n", cs42l42->hs_type);
                }
        }
 
@@ -1371,8 +1401,19 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
                        if (cs42l42->plug_state != CS42L42_TS_UNPLUG) {
                                cs42l42->plug_state = CS42L42_TS_UNPLUG;
                                cs42l42_cancel_hs_type_detect(cs42l42);
-                               dev_dbg(component->dev,
-                                       "Unplug event\n");
+
+                               switch(cs42l42->hs_type){
+                               case CS42L42_PLUG_CTIA:
+                               case CS42L42_PLUG_OMTP:
+                                       snd_soc_jack_report(&cs42l42->jack, 0, SND_JACK_HEADSET);
+                                       break;
+                               case CS42L42_PLUG_HEADPHONE:
+                                       snd_soc_jack_report(&cs42l42->jack, 0, SND_JACK_HEADPHONE);
+                                       break;
+                               default:
+                                       break;
+                               }
+                               dev_dbg(component->dev, "Unplug event\n");
                        }
                        break;
 
@@ -1387,14 +1428,15 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
                if (!(current_button_status &
                        CS42L42_M_HSBIAS_HIZ_MASK)) {
 
-                       if (current_button_status &
-                               CS42L42_M_DETECT_TF_MASK) {
-                               dev_dbg(component->dev,
-                                       "Button released\n");
-                       } else if (current_button_status &
-                               CS42L42_M_DETECT_FT_MASK) {
-                               cs42l42_handle_button_press(cs42l42);
+                       if (current_button_status & CS42L42_M_DETECT_TF_MASK) {
+                               dev_dbg(component->dev, "Button released\n");
+                               report = 0;
+                       } else if (current_button_status & CS42L42_M_DETECT_FT_MASK) {
+                               report = cs42l42_handle_button_press(cs42l42);
+
                        }
+                       snd_soc_jack_report(&cs42l42->jack, report, SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+                                                                  SND_JACK_BTN_2 | SND_JACK_BTN_3);
                }
        }
 

diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index c373259..e128288 100644 (file)
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -12,6 +12,8 @@
 #ifndef __CS42L42_H__
 #define __CS42L42_H__
 
+#include <sound/jack.h>
+
 #define CS42L42_PAGE_REGISTER  0x00    /* Page Select Register */
 #define CS42L42_WIN_START      0x00
 #define CS42L42_WIN_LEN                0x100
@@ -768,6 +770,7 @@ struct  cs42l42_private {
        struct regulator_bulk_data supplies[CS42L42_NUM_SUPPLIES];
        struct gpio_desc *reset_gpio;
        struct completion pdn_done;
+       struct snd_soc_jack jack;
        u32 sclk;
        u32 srate;
        u8 plug_state;