[PATCH 1/3] HID: wacom: Remove CONFIG_HID_WACOM_POWER_SUPPLY option

[PATCH 1/3] HID: wacom: Remove CONFIG_HID_WACOM_POWER_SUPPLY option

[Przemo Firszt]

This option was ment as a safety mechanism in case the system treats the wacom
tablet battery as the main power supply. It's no longer required as now we can
distinguish between system power supply and device power supply.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
---
 drivers/hid/Kconfig     |    8 +-------
 drivers/hid/hid-wacom.c |   14 --------------
 2 files changed, 1 insertions(+), 21 deletions(-)

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index a421abd..8011d77 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -620,16 +620,10 @@ config THRUSTMASTER_FF
 config HID_WACOM
 	tristate "Wacom Bluetooth devices support"
 	depends on BT_HIDP
-	---help---
-	Support for Wacom Graphire Bluetooth tablet.
-
-config HID_WACOM_POWER_SUPPLY
-	bool "Wacom Bluetooth devices power supply status support"
 	depends on HID_WACOM
 	select POWER_SUPPLY
 	---help---
-	  Say Y here if you want to enable power supply status monitoring for
-	  Wacom Bluetooth devices.
+	Support for Wacom Graphire Bluetooth tablet.
 
 config HID_WIIMOTE
 	tristate "Nintendo Wii Remote support"
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 067e296..09d102c 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -41,14 +41,11 @@ struct wacom_data {
 	__u32 id;
 	__u32 serial;
 	unsigned char high_speed;
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 	int battery_capacity;
 	struct power_supply battery;
 	struct power_supply ac;
-#endif
 };
 
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 /*percent of battery capacity, 0 means AC online*/
 static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
 
@@ -120,7 +117,6 @@ static int wacom_ac_get_property(struct power_supply *psy,
 	}
 	return ret;
 }
-#endif
 
 static void wacom_set_features(struct hid_device *hdev)
 {
@@ -310,12 +306,10 @@ static int wacom_gr_parse_report(struct hid_device *hdev,
 		input_sync(input);
 	}
 
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 	/* Store current battery capacity */
 	rw = (data[7] >> 2 & 0x07);
 	if (rw != wdata->battery_capacity)
 		wdata->battery_capacity = rw;
-#endif
 	return 1;
 }
 
@@ -596,7 +590,6 @@ static int wacom_probe(struct hid_device *hdev,
 		break;
 	}
 
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 	wdata->battery.properties = wacom_battery_props;
 	wdata->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
 	wdata->battery.get_property = wacom_battery_get_property;
@@ -629,16 +622,13 @@ static int wacom_probe(struct hid_device *hdev,
 	}
 
 	power_supply_powers(&wdata->ac, &hdev->dev);
-#endif
 	return 0;
 
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 err_ac:
 	power_supply_unregister(&wdata->battery);
 err_battery:
 	device_remove_file(&hdev->dev, &dev_attr_speed);
 	hid_hw_stop(hdev);
-#endif
 err_free:
 	kfree(wdata);
 	return ret;
@@ -646,16 +636,12 @@ err_free:
 
 static void wacom_remove(struct hid_device *hdev)
 {
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 	struct wacom_data *wdata = hid_get_drvdata(hdev);
-#endif
 	device_remove_file(&hdev->dev, &dev_attr_speed);
 	hid_hw_stop(hdev);
 
-#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
 	power_supply_unregister(&wdata->battery);
 	power_supply_unregister(&wdata->ac);
-#endif
 	kfree(hid_get_drvdata(hdev));
 }
 
-- 
1.7.6.4

[PATCH 2/3] HID: wacom: Refactor battery/ac reporting for Graphire

[Przemo Firszt]

This patch doesn't change the way battery/ac is reported, but the changes are
required to facilitate battery reporting for Intuos4 WL.
wdata->battery_capacity now stores actual battery capacity as opposed to raw
value reported by wacom graphire previously. Power supply state is now stored
in a separate variable - it used to be calculated on-the-fly in
wacom_ac_get_property function. The raw value has to be stored as well to be
able to determine if it has changed.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
---
 drivers/hid/hid-wacom.c |   34 +++++++++++++++++-----------------
 1 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 09d102c..9c15494 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -41,13 +41,16 @@ struct wacom_data {
 	__u32 id;
 	__u32 serial;
 	unsigned char high_speed;
-	int battery_capacity;
+	__u8 battery_capacity;
+	__u8 power_raw;
+	__u8 ps_connected;
 	struct power_supply battery;
 	struct power_supply ac;
 };
 
-/*percent of battery capacity, 0 means AC online*/
-static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
+/*percent of battery capacity for Graphire
+  8th value means AC online and show 100% capacity */
+static unsigned short batcap_gr[8] = { 1, 15, 25, 35, 50, 70, 100, 100 };
 
 static enum power_supply_property wacom_battery_props[] = {
 	POWER_SUPPLY_PROP_PRESENT,
@@ -67,7 +70,6 @@ static int wacom_battery_get_property(struct power_supply *psy,
 {
 	struct wacom_data *wdata = container_of(psy,
 					struct wacom_data, battery);
-	int power_state = batcap[wdata->battery_capacity];
 	int ret = 0;
 
 	switch (psp) {
@@ -78,11 +80,7 @@ static int wacom_battery_get_property(struct power_supply *psy,
 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
-		/* show 100% battery capacity when charging */
-		if (power_state == 0)
-			val->intval = 100;
-		else
-			val->intval = power_state;
+		val->intval = wdata->battery_capacity;
 		break;
 	default:
 		ret = -EINVAL;
@@ -96,17 +94,13 @@ static int wacom_ac_get_property(struct power_supply *psy,
 				union power_supply_propval *val)
 {
 	struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
-	int power_state = batcap[wdata->battery_capacity];
 	int ret = 0;
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_PRESENT:
 		/* fall through */
 	case POWER_SUPPLY_PROP_ONLINE:
-		if (power_state == 0)
-			val->intval = 1;
-		else
-			val->intval = 0;
+		val->intval = wdata->ps_connected;
 		break;
 	case POWER_SUPPLY_PROP_SCOPE:
 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
@@ -306,10 +300,16 @@ static int wacom_gr_parse_report(struct hid_device *hdev,
 		input_sync(input);
 	}
 
-	/* Store current battery capacity */
+	/* Store current battery capacity and power supply state*/
 	rw = (data[7] >> 2 & 0x07);
-	if (rw != wdata->battery_capacity)
-		wdata->battery_capacity = rw;
+	if (rw != wdata->power_raw) {
+		wdata->power_raw = rw;
+		wdata->battery_capacity = batcap_gr[rw];
+		if (rw == 7)
+			wdata->ps_connected = 1;
+		else
+			wdata->ps_connected = 0;
+	}
 	return 1;
 }
 
-- 
1.7.6.4

[PATCH 3/3] HID: wacom: Add battery/ac reporting for Intuos4 WL

[Przemo Firszt]

This patch adds battery/ac reporting for Intuos4 WL. It uses existing
sysfs code, but the device reports battery capacity in more fine-grained way,
so there has to be a separate lookup table (called batcap_i4).

Signed-off-by: Przemo Firszt <przemo@firszt.eu>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
---
 drivers/hid/hid-wacom.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 9c15494..43a96d1 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -51,6 +51,8 @@ struct wacom_data {
 /*percent of battery capacity for Graphire
   8th value means AC online and show 100% capacity */
 static unsigned short batcap_gr[8] = { 1, 15, 25, 35, 50, 70, 100, 100 };
+/*percent of battery capacity for Intuos4 WL, AC has a separate bit*/
+static unsigned short batcap_i4[8] = { 1, 15, 30, 45, 60, 70, 85, 100 };
 
 static enum power_supply_property wacom_battery_props[] = {
 	POWER_SUPPLY_PROP_PRESENT,
@@ -449,6 +451,7 @@ static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
 	struct input_dev *input;
 	unsigned char *data = (unsigned char *) raw_data;
 	int i;
+	__u8 power_raw;
 
 	if (!(hdev->claimed & HID_CLAIMED_INPUT))
 		return 0;
@@ -476,6 +479,13 @@ static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
 			wacom_i4_parse_report(hdev, wdata, input, data + i);
 			i += 10;
 			wacom_i4_parse_report(hdev, wdata, input, data + i);
+			power_raw = data[i+10];
+			if (power_raw != wdata->power_raw) {
+				wdata->power_raw = power_raw;
+				wdata->battery_capacity = batcap_i4[power_raw & 0x07];
+				wdata->ps_connected = power_raw & 0x08;
+			}
+
 			break;
 		default:
 			hid_err(hdev, "Unknown report: %d,%d size:%d\n",
-- 
1.7.6.4

Re: [PATCH 1/3] HID: wacom: Remove CONFIG_HID_WACOM_POWER_SUPPLY option

[Przemo Firszt]

Dnia 2012-03-19, pon o godzinie 19:08 +0000, Przemo Firszt pisze:
> This option was ment as a safety mechanism in case the system treats the wacom
> tablet battery as the main power supply. It's no longer required as now we can
> distinguish between system power supply and device power supply.
> 
> Signed-off-by: Przemo Firszt <przemo@firszt.eu>
> Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
> ---
Jiri,
I just noticed that there is one more CONFIG_HID_WACOM_POWER_SUPPLY in
drivers/hid/hid-wacom.c that needs to be removed. If you didn't apply it
yet I'd like to resend all 3 patches or if you alredy did it I just
submit a fix patch.
-- 
Regards,
Przemo Firszt