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From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: gregkh@linuxfoundation.org
Cc: linuxarm@huawei.com, mauro.chehab@huawei.com,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
	"Pavel Machek" <pavel@ucw.cz>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	linux-leds@vger.kernel.org, linux-staging@lists.linux.dev
Subject: [PATCH 09/17] staging: nuc-wmi: Add support to blink behavior for NUC8/10
Date: Sun, 16 May 2021 12:53:37 +0200	[thread overview]
Message-ID: <9f7b5e0f3fd726802a9cd3b9b921cc2bb13101ef.1621161037.git.mchehab+huawei@kernel.org> (raw)
In-Reply-To: <cover.1621161037.git.mchehab+huawei@kernel.org>

The hardware blink logic works for both Power State and Software
controlled LEDs.

Just like brightness, there is one different blink behavior
per different power state. Due to that, the logic is somewhat
more complex than what it would be expected otherwise.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/staging/nuc-led/nuc-wmi.c | 347 +++++++++++++++++++++++++++---
 1 file changed, 322 insertions(+), 25 deletions(-)

diff --git a/drivers/staging/nuc-led/nuc-wmi.c b/drivers/staging/nuc-led/nuc-wmi.c
index a365a8603182..8967c8d54dac 100644
--- a/drivers/staging/nuc-led/nuc-wmi.c
+++ b/drivers/staging/nuc-led/nuc-wmi.c
@@ -527,18 +527,30 @@ static ssize_t nuc_wmi_set_brightness_offset(struct device *dev,
 #define LED_ATTR_RW(_name) \
 	DEVICE_ATTR(_name, 0644, show_##_name, store_##_name)
 
-#define LED_ATTR_POWER_STATE_RW(_name, offset)				       \
+#define LED_ATTR_POWER_STATE_RW(_name, _offname, _offset)		       \
 	static ssize_t show_##_name(struct device *dev,			       \
 				    struct device_attribute *attr,	       \
 				    char *buf)				       \
 	{								       \
-		return show_brightness_offset(dev, attr, offset, buf);	       \
+		struct led_classdev *cdev = dev_get_drvdata(dev);	       \
+		struct nuc_nmi_led *led;				       \
+									       \
+		led = container_of(cdev, struct nuc_nmi_led, cdev);	       \
+		if (led->indicator != LED_IND_POWER_STATE)		       \
+			return -ENODEV;					       \
+		return offset_show_##_offname(dev, attr, _offset, buf);	       \
 	}								       \
 	static ssize_t store_##_name(struct device *dev,		       \
-				    struct device_attribute *attr,	       \
-				    const char *buf, size_t len)	       \
+				     struct device_attribute *attr,	       \
+				     const char *buf, size_t len)	       \
 	{								       \
-		return store_brightness_offset(dev, attr, offset, buf, len);   \
+		struct led_classdev *cdev = dev_get_drvdata(dev);	       \
+		struct nuc_nmi_led *led;				       \
+									       \
+		led = container_of(cdev, struct nuc_nmi_led, cdev);	       \
+		if (led->indicator != LED_IND_POWER_STATE)		       \
+			return -ENODEV;					       \
+		return offset_store_##_offname(dev, attr, _offset, buf, len);  \
 	}								       \
 	static DEVICE_ATTR(_name, 0644, show_##_name, store_##_name)
 
@@ -681,7 +693,7 @@ static ssize_t nuc6_store_color(struct device *dev,
 	const char *tmp;
 	int ret, color;
 
-	tmp = strsep((char **)&buf, ",\n");
+	tmp = strsep((char **)&buf, "\n");
 
 	if (led->id == POWER_LED) {
 		for (color = ARRAY_SIZE(nuc6_power_colors)+1; color >= 0; color--)
@@ -1000,7 +1012,7 @@ static umode_t nuc_wmi_led_color_is_visible(struct kobject *kobj,
 }
 
 /* Show/store brightness */
-static ssize_t show_brightness_offset(struct device *dev,
+static ssize_t offset_show_brightness(struct device *dev,
 				      struct device_attribute *attr,
 				      u8 offset,
 				      char *buf)
@@ -1009,9 +1021,6 @@ static ssize_t show_brightness_offset(struct device *dev,
 	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
 	int ret;
 
-	if (led->indicator != LED_IND_POWER_STATE)
-		return -ENODEV;
-
 	offset *= led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS];
 
 	ret = nuc_wmi_get_brightness_offset(dev, led, offset);
@@ -1021,7 +1030,7 @@ static ssize_t show_brightness_offset(struct device *dev,
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 }
 
-static ssize_t store_brightness_offset(struct device *dev,
+static ssize_t offset_store_brightness(struct device *dev,
 				       struct device_attribute *attr,
 				       u8 offset,
 				       const char *buf, size_t len)
@@ -1031,9 +1040,6 @@ static ssize_t store_brightness_offset(struct device *dev,
 	int ret;
 	u8 val;
 
-	if (led->indicator != LED_IND_POWER_STATE)
-		return -ENODEV;
-
 	if (kstrtou8(buf, 0, &val) || val > 100)
 		return -EINVAL;
 
@@ -1067,6 +1073,8 @@ static int nuc_wmi_set_brightness(struct led_classdev *cdev,
 	return nuc_wmi_set_brightness_offset(cdev->dev, led, 0, brightness);
 }
 
+#define cmp_attr_prefix(a, b)     strncmp(a, b, strlen(b))
+
 static umode_t nuc_wmi_led_power_state_is_visible(struct kobject *kobj,
 						  struct attribute *attr,
 						  int idx)
@@ -1074,33 +1082,297 @@ static umode_t nuc_wmi_led_power_state_is_visible(struct kobject *kobj,
 	struct device *dev = kobj_to_dev(kobj);
 	struct led_classdev *cdev = dev_get_drvdata(dev);
 	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
-
 	umode_t mode = attr->mode;
 
-	if (!strcmp(attr->name, "s0_brightness") ||
-	    !strcmp(attr->name, "s3_brightness"))
+	if (!cmp_attr_prefix(attr->name, "s0_") ||
+	    !cmp_attr_prefix(attr->name, "s3_"))
 		return mode;
 
 	if (led->api_rev == LED_API_REV_0_64) {
-		if (!strcmp(attr->name, "s5_brightness") ||
-		    !strcmp(attr->name, "ready_mode_brightness"))
+		if (!cmp_attr_prefix(attr->name, "s5_") ||
+		    !cmp_attr_prefix(attr->name, "ready_mode_"))
 			return mode;
 	} else {
-		if (!strcmp(attr->name, "standby_brightness"))
+		if (!cmp_attr_prefix(attr->name, "standby_"))
 			return mode;
 	}
 
 	return 0;
 }
 
+/* Blink */
+static const char * const led_blink_behaviors[] = {
+	"solid",
+	"breathing",
+	"pulsing",
+	"strobing"
+};
+
+static const char * const led_blink_frequencies[] = {
+	"0.1",
+	"0.2",
+	"0.3",
+	"0.4",
+	"0.5",
+	"0.6",
+	"0.7",
+	"0.8",
+	"0.9",
+	"1.0",
+};
+
+static ssize_t offset_show_blink_behavior(struct device *dev,
+					  struct device_attribute *attr,
+					  u8 offset,
+					  char *buf)
+{
+	struct led_classdev *cdev = dev_get_drvdata(dev);
+	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
+	u8 input[NUM_INPUT_ARGS];
+	u8 output[NUM_OUTPUT_ARGS];
+	int ret, ctrl, val, i, n;
+	int size = PAGE_SIZE;
+	char *p = buf;
+
+	if (led->indicator == LED_IND_DISABLE)
+		return -ENODEV;
+
+	offset *= led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS];
+	ctrl = led->reg_table[led->indicator][LED_FUNC_BLINK_BEHAVIOR] + offset;
+
+	if (!nuc_wmi_test_control(dev, led, ctrl))
+		return -ENODEV;
+
+	input[0] = LED_NEW_GET_CONTROL_ITEM;
+	input[1] = led->id;
+	input[2] = led->indicator;
+	input[3] = ctrl;
+
+	ret = nuc_nmi_cmd(dev, LED_NEW_GET_STATUS, input, output);
+	if (ret)
+		return ret;
+
+	val = output[0];
+
+	for (i = 0; i < ARRAY_SIZE(led_blink_behaviors); i++) {
+		if (i == val)
+			n = scnprintf(p, size, "[%s]  ", led_blink_behaviors[i]);
+		else
+			n = scnprintf(p, size, "%s  ", led_blink_behaviors[i]);
+		p += n;
+		size -= n;
+	}
+	size -= scnprintf(p, size, "\n");
+
+	return PAGE_SIZE - size;
+}
+
+static ssize_t offset_store_blink_behavior(struct device *dev,
+					   struct device_attribute *attr,
+					   u8 offset,
+					   const char *buf, size_t len)
+{
+	struct led_classdev *cdev = dev_get_drvdata(dev);
+	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
+	u8 input[NUM_INPUT_ARGS] = { 0 };
+	int ctrl, val, ret;
+	const char *tmp;
+
+	if (led->indicator == LED_IND_DISABLE)
+		return -ENODEV;
+
+
+	if (led->id != LED_IND_SOFTWARE && led->id != LED_IND_POWER_STATE)
+		return -ENODEV;
+
+	offset *= led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS];
+	ctrl = led->reg_table[led->indicator][LED_FUNC_BLINK_BEHAVIOR] + offset;
+
+	if (!nuc_wmi_test_control(dev, led, ctrl))
+		return -ENODEV;
+
+	tmp = strsep((char **)&buf, "\n");
+
+	for (val = 0; val < ARRAY_SIZE(led_blink_behaviors); val++)
+		if (!strcasecmp(tmp, led_blink_behaviors[val]))
+			break;
+
+	if (val >= ARRAY_SIZE(led_blink_behaviors))
+		return -EINVAL;
+
+	input[0] = led->id;
+	input[1] = led->indicator;
+	input[2] = ctrl;
+	input[3] = val;
+
+	ret = nuc_nmi_cmd(dev, LED_SET_VALUE, input, NULL);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static ssize_t show_blink_behavior(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	return offset_show_blink_behavior(dev, attr, 0, buf);
+}
+
+static ssize_t store_blink_behavior(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	return offset_store_blink_behavior(dev, attr, 0, buf, len);
+}
+
+static ssize_t offset_show_blink_frequency(struct device *dev,
+					  struct device_attribute *attr,
+					  u8 offset,
+					  char *buf)
+{
+	struct led_classdev *cdev = dev_get_drvdata(dev);
+	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
+	u8 input[NUM_INPUT_ARGS];
+	u8 output[NUM_OUTPUT_ARGS];
+	int ret, ctrl, val, i, n;
+	int size = PAGE_SIZE;
+	char *p = buf;
+
+	if (led->indicator == LED_IND_DISABLE)
+		return -ENODEV;
+
+	offset *= led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS];
+	ctrl = led->reg_table[led->indicator][LED_FUNC_BLINK_BEHAVIOR] + offset;
+
+	if (!nuc_wmi_test_control(dev, led, ctrl))
+		return -ENODEV;
+
+	input[0] = LED_NEW_GET_CONTROL_ITEM;
+	input[1] = led->id;
+	input[2] = led->indicator;
+	input[3] = ctrl;
+
+	ret = nuc_nmi_cmd(dev, LED_NEW_GET_STATUS, input, output);
+	if (ret)
+		return ret;
+
+	val = output[0];
+
+	for (i = 0; i < ARRAY_SIZE(led_blink_frequencies); i++) {
+		if (i == val)
+			n = scnprintf(p, size, "[%s]  ", led_blink_frequencies[i]);
+		else
+			n = scnprintf(p, size, "%s  ", led_blink_frequencies[i]);
+		p += n;
+		size -= n;
+	}
+	size -= scnprintf(p, size, "\n");
+
+	return PAGE_SIZE - size;
+}
+
+static ssize_t offset_store_blink_frequency(struct device *dev,
+					   struct device_attribute *attr,
+					   u8 offset,
+					   const char *buf, size_t len)
+{
+	struct led_classdev *cdev = dev_get_drvdata(dev);
+	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
+	u8 input[NUM_INPUT_ARGS] = { 0 };
+	int ctrl, val, ret;
+	const char *tmp;
+
+	if (led->indicator == LED_IND_DISABLE)
+		return -ENODEV;
+
+
+	if (led->id != LED_IND_SOFTWARE && led->id != LED_IND_POWER_STATE)
+		return -ENODEV;
+
+	offset *= led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS];
+	ctrl = led->reg_table[led->indicator][LED_FUNC_BLINK_BEHAVIOR] + offset;
+
+	if (!nuc_wmi_test_control(dev, led, ctrl))
+		return -ENODEV;
+
+	tmp = strsep((char **)&buf, "\n");
+
+	for (val = 0; val < ARRAY_SIZE(led_blink_frequencies); val++)
+		if (!strcasecmp(tmp, led_blink_frequencies[val]))
+			break;
+
+	if (val >= ARRAY_SIZE(led_blink_frequencies))
+		return -EINVAL;
+
+	input[0] = led->id;
+	input[1] = led->indicator;
+	input[2] = ctrl;
+	input[3] = val + 1;
+
+	ret = nuc_nmi_cmd(dev, LED_SET_VALUE, input, NULL);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static ssize_t show_blink_frequency(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	return offset_show_blink_frequency(dev, attr, 0, buf);
+}
+
+static ssize_t store_blink_frequency(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	return offset_store_blink_frequency(dev, attr, 0, buf, len);
+}
+
+static umode_t nuc_wmi_led_blink_is_visible(struct kobject *kobj,
+					    struct attribute *attr, int idx)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct led_classdev *cdev = dev_get_drvdata(dev);
+	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
+	umode_t mode = attr->mode;
+
+	// TODO: implement for NUC6 API
+	if (led->api_rev == LED_API_NUC6)
+		return 0;
+
+	if (led->id == LED_IND_SOFTWARE)
+		return mode;
+
+	return 0;
+}
+
 static LED_ATTR_RW(indicator);
 static LED_ATTR_RW(color);
+static LED_ATTR_RW(blink_behavior);
+static LED_ATTR_RW(blink_frequency);
 
-LED_ATTR_POWER_STATE_RW(s0_brightness, 0);
-LED_ATTR_POWER_STATE_RW(s3_brightness, 1);
-LED_ATTR_POWER_STATE_RW(s5_brightness, 2);		// Rev 0.64
-LED_ATTR_POWER_STATE_RW(standby_brightness, 2);		// Rev 1.0
-LED_ATTR_POWER_STATE_RW(ready_mode_brightness, 3);	// Rev 1.0
+LED_ATTR_POWER_STATE_RW(s0_brightness, brightness, 0);
+LED_ATTR_POWER_STATE_RW(s0_blink_behavior, blink_behavior, 0);
+LED_ATTR_POWER_STATE_RW(s0_blink_frequency, blink_frequency, 0);
+LED_ATTR_POWER_STATE_RW(s3_brightness, brightness, 1);
+LED_ATTR_POWER_STATE_RW(s3_blink_behavior, blink_behavior, 1);
+LED_ATTR_POWER_STATE_RW(s3_blink_frequency, blink_frequency, 1);
+
+/* Rev 0.64 */
+LED_ATTR_POWER_STATE_RW(s5_brightness, brightness, 2);
+LED_ATTR_POWER_STATE_RW(s5_blink_behavior, blink_behavior, 2);
+LED_ATTR_POWER_STATE_RW(s5_blink_frequency, blink_frequency, 2);
+LED_ATTR_POWER_STATE_RW(ready_mode_brightness, brightness, 3);
+LED_ATTR_POWER_STATE_RW(ready_mode_blink_behavior, blink_behavior, 3);
+LED_ATTR_POWER_STATE_RW(ready_mode_blink_frequency, blink_frequency, 3);
+
+/* Rev 1.0 */
+LED_ATTR_POWER_STATE_RW(standby_brightness, brightness, 2);
+LED_ATTR_POWER_STATE_RW(standby_blink_behavior, blink_behavior, 2);
+LED_ATTR_POWER_STATE_RW(standby_blink_frequency, blink_frequency, 2);
 
 /*
  * Attributes for LEDs
@@ -1121,6 +1393,19 @@ static struct attribute *nuc_wmi_led_power_state_attr[] = {
 	&dev_attr_standby_brightness.attr,
 	&dev_attr_s5_brightness.attr,
 	&dev_attr_ready_mode_brightness.attr,
+
+	&dev_attr_s0_blink_behavior.attr,
+	&dev_attr_s3_blink_behavior.attr,
+	&dev_attr_standby_blink_behavior.attr,
+	&dev_attr_s5_blink_behavior.attr,
+	&dev_attr_ready_mode_blink_behavior.attr,
+
+	&dev_attr_s0_blink_frequency.attr,
+	&dev_attr_s3_blink_frequency.attr,
+	&dev_attr_standby_blink_frequency.attr,
+	&dev_attr_s5_blink_frequency.attr,
+	&dev_attr_ready_mode_blink_frequency.attr,
+
 	NULL,
 };
 
@@ -1139,10 +1424,22 @@ static const struct attribute_group nuc_wmi_led_color_attribute_group = {
 	.attrs = nuc_wmi_led_color_attr,
 };
 
+static struct attribute *nuc_wmi_led_blink_behavior_attr[] = {
+	&dev_attr_blink_behavior.attr,
+	&dev_attr_blink_frequency.attr,
+	NULL,
+};
+
+static const struct attribute_group nuc_wmi_led_blink_attribute_group = {
+	.is_visible = nuc_wmi_led_blink_is_visible,
+	.attrs = nuc_wmi_led_blink_behavior_attr,
+};
+
 static const struct attribute_group *nuc_wmi_led_attribute_groups[] = {
 	&nuc_wmi_led_attribute_group,
 	&nuc_wmi_led_power_state_group,
 	&nuc_wmi_led_color_attribute_group,
+	&nuc_wmi_led_blink_attribute_group,
 	NULL
 };
 
-- 
2.31.1


  parent reply	other threads:[~2021-05-16 10:54 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-16 10:53 [PATCH 00/17] Add an experimental driver for Intel NUC leds Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 01/17] staging: add support for NUC WMI LEDs Mauro Carvalho Chehab
2021-05-16 16:12   ` Randy Dunlap
2021-05-17  8:20   ` Greg KH
2021-05-16 10:53 ` [PATCH 02/17] staging: nuc-wmi: detect WMI API detection Mauro Carvalho Chehab
2021-05-17  9:35   ` Dan Carpenter
2021-05-16 10:53 ` [PATCH 03/17] staging: nuc-wmi: add support for changing S0 brightness Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 04/17] staging: nuc-wmi: add all types of brightness Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 05/17] staging: nuc-wmi: allow changing the LED colors Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 06/17] staging: nuc-wmi: add support for WMI API version 1.0 Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 07/17] staging: nuc-wmi: add basic support for NUC6 WMI Mauro Carvalho Chehab
2021-05-17  9:44   ` Dan Carpenter
2021-05-16 10:53 ` [PATCH 08/17] staging: muc-wmi: add brightness and color for NUC6 API Mauro Carvalho Chehab
2021-05-16 10:53 ` Mauro Carvalho Chehab [this message]
2021-05-16 10:53 ` [PATCH 10/17] staging: nuc-wmi: get rid of an unused variable Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 11/17] staging: nuc-wmi: implement blink control for NUC6 Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 12/17] staging: nuc-wmi: better detect NUC6/NUC7 devices Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 13/17] staging: nuc-led: add support for HDD activity default Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 14/17] staging: nuc-wmi: fix software blink behavior logic Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 15/17] staging: nuc-wmi: add support for changing the ethernet type indicator Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 16/17] staging: nuc-wmi: add support for changing the power limit scheme Mauro Carvalho Chehab
2021-05-16 10:53 ` [PATCH 17/17] staging: nuc-led: update the TODOs Mauro Carvalho Chehab
2021-05-16 18:21   ` Pavel Machek
2021-05-17  6:30     ` Mauro Carvalho Chehab
2021-05-17  8:05       ` Pavel Machek
2021-05-17  8:57         ` Mauro Carvalho Chehab
2021-05-17  9:12           ` Mauro Carvalho Chehab
2021-05-17 12:19         ` Mauro Carvalho Chehab
2021-05-17  8:18 ` [PATCH 00/17] Add an experimental driver for Intel NUC leds Greg KH
2021-05-17  9:02   ` Mauro Carvalho Chehab
2021-05-17  9:08     ` Greg KH

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