diff mbox series

[10/15] ASoC: cs42l42: Report jack and button detection

Message ID 20210302170454.39679-11-tanureal@opensource.cirrus.com (mailing list archive)
State Superseded
Headers show
Series Report jack and button detection + Capture Support | expand

Commit Message

Lucas Tanure March 2, 2021, 5:04 p.m. UTC 
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>
---
 sound/soc/codecs/cs42l42.c | 142 +++++++++++++++++++++++++------------
 sound/soc/codecs/cs42l42.h |   4 ++
 2 files changed, 99 insertions(+), 47 deletions(-)

Comments

Mark Brown March 2, 2021, 5:29 p.m. UTC | #1 
On Tue, Mar 02, 2021 at 05:04:49PM +0000, Lucas Tanure wrote:

> 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.

This looks like it should be split into two changes too, one for the
code motion and one for the jack API.  However I'm not convinced it's a
good idea to move the interrupt requesting to the component
registration, in general we should be doing resource acquisition in the
main probe function so things like deferred probe work well - it gets
messy if we try to handle stuff like that in component registration.

I'd have expected the interrupt handling to just be able to check if
there's a jack set, and note that snd_soc_jack_report() supports being
called with a NULL jack anyway.
diff mbox series

Patch

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 9a7217cf59f36..8345f52ec9d58 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -517,29 +517,6 @@  static const struct snd_soc_dapm_route cs42l42_audio_map[] = {
 	{ "SDOUT2", NULL, "ASP TX EN" },
 };
 
-static int cs42l42_component_probe(struct snd_soc_component *component)
-{
-	struct cs42l42_private *cs42l42 =
-		(struct cs42l42_private *)snd_soc_component_get_drvdata(component);
-
-	cs42l42->component = component;
-
-	return 0;
-}
-
-static const struct snd_soc_component_driver soc_component_dev_cs42l42 = {
-	.probe			= cs42l42_component_probe,
-	.dapm_widgets		= cs42l42_dapm_widgets,
-	.num_dapm_widgets	= ARRAY_SIZE(cs42l42_dapm_widgets),
-	.dapm_routes		= cs42l42_audio_map,
-	.num_dapm_routes	= ARRAY_SIZE(cs42l42_audio_map),
-	.controls		= cs42l42_snd_controls,
-	.num_controls		= ARRAY_SIZE(cs42l42_snd_controls),
-	.idle_bias_on		= 1,
-	.endianness		= 1,
-	.non_legacy_dai_naming	= 1,
-};
-
 struct cs42l42_pll_params {
 	u32 sclk;
 	u8 mclk_div;
@@ -1196,7 +1173,7 @@  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;
@@ -1239,17 +1216,24 @@  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 */
@@ -1279,6 +1263,8 @@  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 {
@@ -1323,6 +1309,8 @@  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++) {
@@ -1349,9 +1337,20 @@  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);
 		}
 	}
 
@@ -1369,8 +1368,19 @@  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;
 
@@ -1385,14 +1395,15 @@  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);
 		}
 	}
 
@@ -1731,6 +1742,53 @@  static int cs42l42_handle_device_data(struct i2c_client *i2c_client,
 	return 0;
 }
 
+static int cs42l42_component_probe(struct snd_soc_component *comp)
+{
+	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(comp);
+	struct snd_soc_card *crd = comp->card;
+	int ret = 0;
+
+	cs42l42->component = comp;
+
+	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(comp->dev, "Cannot create CS42L42 Headset: %d\n", ret);
+		return ret;
+	}
+
+	/* Request IRQ */
+	ret = request_threaded_irq(cs42l42->irq, NULL, cs42l42_irq_thread,
+				   IRQF_ONESHOT | IRQF_TRIGGER_LOW, "cs42l42", cs42l42);
+
+	if (ret)
+		dev_err(comp->dev, "Failed to request IRQ: %d\n", ret);
+
+	return ret;
+}
+
+static void cs42l42_component_remove(struct snd_soc_component *comp)
+{
+	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(comp);
+
+	free_irq(cs42l42->irq, cs42l42);
+}
+
+static const struct snd_soc_component_driver soc_component_dev_cs42l42 = {
+	.probe			= cs42l42_component_probe,
+	.remove			= cs42l42_component_remove,
+	.dapm_widgets		= cs42l42_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(cs42l42_dapm_widgets),
+	.dapm_routes		= cs42l42_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(cs42l42_audio_map),
+	.controls		= cs42l42_snd_controls,
+	.num_controls		= ARRAY_SIZE(cs42l42_snd_controls),
+	.idle_bias_on		= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
 static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 				       const struct i2c_device_id *id)
 {
@@ -1745,6 +1803,7 @@  static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 		return -ENOMEM;
 
 	i2c_set_clientdata(i2c_client, cs42l42);
+	cs42l42->irq = i2c_client->irq;
 
 	cs42l42->regmap = devm_regmap_init_i2c(i2c_client, &cs42l42_regmap);
 	if (IS_ERR(cs42l42->regmap)) {
@@ -1787,17 +1846,6 @@  static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 	}
 	usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2);
 
-	/* Request IRQ */
-	ret = devm_request_threaded_irq(&i2c_client->dev,
-			i2c_client->irq,
-			NULL, cs42l42_irq_thread,
-			IRQF_ONESHOT | IRQF_TRIGGER_LOW,
-			"cs42l42", cs42l42);
-
-	if (ret != 0)
-		dev_err(&i2c_client->dev,
-			"Failed to request IRQ: %d\n", ret);
-
 	/* initialize codec */
 	ret = regmap_read(cs42l42->regmap, CS42L42_DEVID_AB, &reg);
 	devid = (reg & 0xFF) << 12;
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index c373259ed46f7..267c2b616e57d 100644
--- 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 +770,8 @@  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;
+	int irq;
 	u32 sclk;
 	u32 srate;
 	u8 plug_state;