[PATCH 5/7] input: cyapa: add proximity and interrupt sysfs interfaces support

[Dudley Du <dudl@cypress.com>]

Add proximity and interrupt control interfaces in sysfs device node.
The proximity interface is used to disable/enable proximity function in device.
The interrupt interface is used to disbale/enable interrupt from device.
TEST=test on Chromebook.

Signed-off-by: Dudley Du <dudl@cypress.com>
---
 drivers/input/mouse/cyapa.c      | 101 +++++++++++++++++++++++++++++++++++++++
 drivers/input/mouse/cyapa.h      |   4 ++
 drivers/input/mouse/cyapa_gen3.c |   1 +
 drivers/input/mouse/cyapa_gen5.c |   2 +
 drivers/input/mouse/cyapa_gen6.c |  14 ++++++
 5 files changed, 122 insertions(+)

diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index faead4d..86f2263 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -594,6 +594,7 @@ static int cyapa_initialize(struct cyapa *cyapa)
 
 	cyapa->state = CYAPA_STATE_NO_DEVICE;
 	cyapa->gen = CYAPA_GEN_UNKNOWN;
+	cyapa->interrupt = true;
 	mutex_init(&cyapa->state_sync_lock);
 
 	/*
@@ -1217,12 +1218,110 @@ static ssize_t cyapa_show_mode(struct device *dev,
 	return size;
 }
 
+static ssize_t cyapa_show_interrupt(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct cyapa *cyapa = dev_get_drvdata(dev);
+	int size;
+	int error;
+
+	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+	if (error)
+		return error;
+
+	size = scnprintf(buf, PAGE_SIZE, "%d\n", cyapa->interrupt ? 1 : 0);
+
+	mutex_unlock(&cyapa->state_sync_lock);
+	return size;
+}
+
+static ssize_t cyapa_interrupt_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct cyapa *cyapa = dev_get_drvdata(dev);
+	u16 value;
+	int error;
+
+	if (cyapa->gen < CYAPA_GEN6)
+		return -EOPNOTSUPP;
+
+	if (kstrtou16(buf, 10, &value)) {
+		dev_err(dev, "invalid interrupt set parameter\n");
+		return -EINVAL;
+	}
+
+	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+	if (error)
+		return error;
+
+	if (cyapa->operational)
+		error = cyapa->ops->set_interrupt(cyapa,
+						  value ? true : false);
+	else
+		error = -EBUSY;  /* Still running in bootloader mode. */
+
+	mutex_unlock(&cyapa->state_sync_lock);
+	return error < 0 ? error : count;
+}
+
+static ssize_t cyapa_show_proximity(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct cyapa *cyapa = dev_get_drvdata(dev);
+	int size;
+	int error;
+
+	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+	if (error)
+		return error;
+
+	size = scnprintf(buf, PAGE_SIZE, "%d\n", cyapa->proximity ? 1 : 0);
+
+	mutex_unlock(&cyapa->state_sync_lock);
+	return size;
+}
+
+static ssize_t cyapa_proximity_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct cyapa *cyapa = dev_get_drvdata(dev);
+	u16 value;
+	int error;
+
+	if (cyapa->gen < CYAPA_GEN5)
+		return -EOPNOTSUPP;
+
+	if (kstrtou16(buf, 10, &value)) {
+		dev_err(dev, "invalid set value of proximity\n");
+		return -EINVAL;
+	}
+
+	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+	if (error)
+		return error;
+
+	if (cyapa->operational)
+		error = cyapa->ops->set_proximity(cyapa,
+						  value ? true : false);
+	else
+		error = -EBUSY;  /* Still running in bootloader mode. */
+
+	mutex_unlock(&cyapa->state_sync_lock);
+	return error < 0 ? error : count;
+}
+
 static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
 static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
 static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
 static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
 static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
+static DEVICE_ATTR(interrupt, S_IRUGO | S_IWUSR,
+		   cyapa_show_interrupt, cyapa_interrupt_store);
+static DEVICE_ATTR(proximity, S_IRUGO | S_IWUSR,
+		   cyapa_show_proximity, cyapa_proximity_store);
 
 static struct attribute *cyapa_sysfs_entries[] = {
 	&dev_attr_firmware_version.attr,
@@ -1231,6 +1330,8 @@ static struct attribute *cyapa_sysfs_entries[] = {
 	&dev_attr_baseline.attr,
 	&dev_attr_calibrate.attr,
 	&dev_attr_mode.attr,
+	&dev_attr_interrupt.attr,
+	&dev_attr_proximity.attr,
 	NULL,
 };
 
diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h
index cc30367..0ce66c5 100644
--- a/drivers/input/mouse/cyapa.h
+++ b/drivers/input/mouse/cyapa.h
@@ -275,6 +275,7 @@ struct cyapa_dev_ops {
 
 	int (*set_power_mode)(struct cyapa *, u8, u16, bool);
 
+	int (*set_interrupt)(struct cyapa *, bool);
 	int (*set_proximity)(struct cyapa *, bool);
 };
 
@@ -365,6 +366,9 @@ struct cyapa {
 	 */
 	struct mutex state_sync_lock;
 
+	bool interrupt;
+	bool proximity;
+
 	const struct cyapa_dev_ops *ops;
 
 	union cyapa_cmd_states cmd_states;
diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c
index 2d077e5..41c40b5 100644
--- a/drivers/input/mouse/cyapa_gen3.c
+++ b/drivers/input/mouse/cyapa_gen3.c
@@ -1244,5 +1244,6 @@ const struct cyapa_dev_ops cyapa_gen3_ops = {
 	.sort_empty_output_data = cyapa_gen3_empty_output_data,
 	.set_power_mode = cyapa_gen3_set_power_mode,
 
+	.set_interrupt = cyapa_set_not_supported,
 	.set_proximity = cyapa_set_not_supported,
 };
diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c
index 5ab0cd2..c388540 100644
--- a/drivers/input/mouse/cyapa_gen5.c
+++ b/drivers/input/mouse/cyapa_gen5.c
@@ -1544,6 +1544,7 @@ int cyapa_pip_set_proximity(struct cyapa *cyapa, bool enable)
 		return error < 0 ? error : -EINVAL;
 	}
 
+	cyapa->proximity = enable;
 	return 0;
 }
 
@@ -2835,5 +2836,6 @@ const struct cyapa_dev_ops cyapa_gen5_ops = {
 	.sort_empty_output_data = cyapa_empty_pip_output_data,
 	.set_power_mode = cyapa_gen5_set_power_mode,
 
+	.set_interrupt = cyapa_set_not_supported,
 	.set_proximity = cyapa_pip_set_proximity,
 };
diff --git a/drivers/input/mouse/cyapa_gen6.c b/drivers/input/mouse/cyapa_gen6.c
index 9d76715..6e18c5c 100644
--- a/drivers/input/mouse/cyapa_gen6.c
+++ b/drivers/input/mouse/cyapa_gen6.c
@@ -309,9 +309,22 @@ static int cyapa_gen6_config_dev_irq(struct cyapa *cyapa, u8 cmd_code)
 			)
 		return error < 0 ? error : -EINVAL;
 
+	if (cmd_code == GEN6_ENABLE_DEV_IRQ)
+		cyapa->interrupt = true;
+	else if (cmd_code == GEN6_DISABLE_DEV_IRQ)
+		cyapa->interrupt = false;
+
 	return 0;
 }
 
+static int cyapa_gen6_set_interrupt(struct cyapa *cyapa, bool enable)
+{
+	if (enable)
+		return cyapa_gen6_config_dev_irq(cyapa, GEN6_ENABLE_DEV_IRQ);
+	else
+		return cyapa_gen6_config_dev_irq(cyapa, GEN6_DISABLE_DEV_IRQ);
+}
+
 static int cyapa_gen6_set_proximity(struct cyapa *cyapa, bool enable)
 {
 	int error;
@@ -744,5 +757,6 @@ const struct cyapa_dev_ops cyapa_gen6_ops = {
 	.sort_empty_output_data = cyapa_empty_pip_output_data,
 	.set_power_mode = cyapa_gen6_set_power_mode,
 
+	.set_interrupt = cyapa_gen6_set_interrupt,
 	.set_proximity = cyapa_gen6_set_proximity,
 };
-- 
1.9.1


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