Re: [PATCH v2 07/10] Input - wacom: handle Graphire BT tablets in wacom.ko

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Hi Benjamin,

On Thu, Jul 24, 2014 at 02:14:02PM -0400, Benjamin Tissoires wrote:
> First, merge the Graphire BT tablet.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
> ---
> 
> changes in v2:
> - simplified because part of it has been splitted out in the previous commit.
> 
>  drivers/hid/hid-core.c  |  1 -
>  drivers/hid/hid-wacom.c |  1 -
>  drivers/hid/wacom_sys.c | 42 +++++++++++++++++++++
>  drivers/hid/wacom_wac.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++-
>  drivers/hid/wacom_wac.h |  2 +
>  5 files changed, 140 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index 7cff1c2..4db6804 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -1920,7 +1920,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_3_PRO) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_DUAL_BOX_PRO) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_5_PRO) },
> -	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
>  	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
> diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
> index 4874f4e..967c457 100644
> --- a/drivers/hid/hid-wacom.c
> +++ b/drivers/hid/hid-wacom.c
> @@ -952,7 +952,6 @@ static void wacom_remove(struct hid_device *hdev)
>  }
>  
>  static const struct hid_device_id wacom_devices[] = {
> -	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
>  	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
>  
>  	{ }
> diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
> index add76ec..8492177 100644
> --- a/drivers/hid/wacom_sys.c
> +++ b/drivers/hid/wacom_sys.c
> @@ -265,6 +265,48 @@ static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
>  static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
>  		struct wacom_features *features)
>  {
> +	struct wacom *wacom = hid_get_drvdata(hdev);
> +	int limit, ret;
> +	__u8 rep_data[2];

I think just u8 in kerneli proper.

> +
> +	switch (features->type) {
> +	case GRAPHIRE_BT:
> +		rep_data[0] = 0x03 ; rep_data[1] = 0x00;
> +		limit = 3;
> +		do {
> +			ret = hid_hw_raw_request(hdev, rep_data[0], rep_data, 2,
> +					HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
> +		} while (ret < 0 && limit-- > 0);
> +
> +		if (ret >= 0) {
> +			if (speed == 0)
> +				rep_data[0] = 0x05;
> +			else
> +				rep_data[0] = 0x06;

I am a fan of

			rep_data[0] = speed == 0 ? 0x05 : 0x06;

as it takes 1 line vs 3.

> +
> +			rep_data[1] = 0x00;
> +			limit = 3;
> +			do {
> +				ret = hid_hw_raw_request(hdev, rep_data[0],
> +					rep_data, 2, HID_FEATURE_REPORT,
> +					HID_REQ_SET_REPORT);
> +			} while (ret < 0 && limit-- > 0);
> +
> +			if (ret >= 0) {
> +				wacom->wacom_wac.bt_high_speed = speed;
> +				return 0;
> +			}
> +		}
> +
> +		/*
> +		 * Note that if the raw queries fail, it's not a hard failure
> +		 * and it is safe to continue
> +		 */
> +		hid_warn(hdev, "failed to poke device, command %d, err %d\n",
> +			 rep_data[0], ret);
> +		break;
> +	}
> +
>  	return 0;
>  }
>  
> diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
> index 2c69326..06bc600 100644
> --- a/drivers/hid/wacom_wac.c
> +++ b/drivers/hid/wacom_wac.c
> @@ -30,6 +30,10 @@
>   */
>  #define WACOM_CONTACT_AREA_SCALE 2607
>  
> +/*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 int wacom_penpartner_irq(struct wacom_wac *wacom)
>  {
>  	unsigned char *data = wacom->data;
> @@ -263,11 +267,19 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
>  	unsigned char *data = wacom->data;
>  	struct input_dev *input = wacom->input;
>  	struct input_dev *pad_input = wacom->pad_input;
> +	int battery_capacity, ps_connected;
>  	int prox;
>  	int rw = 0;
>  	int retval = 0;
>  
> -	if (data[0] != WACOM_REPORT_PENABLED) {
> +	if (features->type == GRAPHIRE_BT) {
> +		if (data[0] != WACOM_REPORT_PENABLED_BT) {
> +			dev_dbg(input->dev.parent,
> +				"%s: received unknown report #%d\n", __func__,
> +				data[0]);
> +			goto exit;
> +		}
> +	} else if (data[0] != WACOM_REPORT_PENABLED) {
>  		dev_dbg(input->dev.parent,
>  			"%s: received unknown report #%d\n", __func__, data[0]);
>  		goto exit;
> @@ -301,7 +313,12 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
>  		input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
>  		input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
>  		if (wacom->tool[0] != BTN_TOOL_MOUSE) {
> -			input_report_abs(input, ABS_PRESSURE, data[6] | ((data[7] & 0x03) << 8));
> +			if (features->type == GRAPHIRE_BT)
> +				input_report_abs(input, ABS_PRESSURE, data[6] |
> +					(((__u16) (data[1] & 0x08)) << 5));
> +			else
> +				input_report_abs(input, ABS_PRESSURE, data[6] |
> +					((data[7] & 0x03) << 8));
>  			input_report_key(input, BTN_TOUCH, data[1] & 0x01);
>  			input_report_key(input, BTN_STYLUS, data[1] & 0x02);
>  			input_report_key(input, BTN_STYLUS2, data[1] & 0x04);
> @@ -312,6 +329,23 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
>  					features->type == WACOM_MO) {
>  				input_report_abs(input, ABS_DISTANCE, data[6] & 0x3f);
>  				rw = (data[7] & 0x04) - (data[7] & 0x03);
> +			} else if (features->type == GRAPHIRE_BT) {
> +				/* Compute distance between mouse and tablet */
> +				rw = 44 - (data[6] >> 2);
> +				if (rw < 0)
> +					rw = 0;
> +				else if (rw > 31)
> +					rw = 31;

				rw = clamp_val(rw, 0, 31);

?

> +				input_report_abs(input, ABS_DISTANCE, rw);
> +				if (((data[1] >> 5) & 3) == 2) {
> +					/* Mouse with wheel */
> +					input_report_key(input, BTN_MIDDLE,
> +							data[1] & 0x04);
> +					rw = (data[6] & 0x01) ? -1 :
> +						(data[6] & 0x02) ? 1 : 0;
> +				} else {
> +					rw = 0;
> +				}
>  			} else {
>  				input_report_abs(input, ABS_DISTANCE, data[7] & 0x3f);
>  				rw = -(signed char)data[6];
> @@ -358,6 +392,31 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
>  			retval = 1;
>  		}
>  		break;
> +	case GRAPHIRE_BT:
> +		prox = data[7] & 0x03;
> +		if (prox || wacom->id[1]) {
> +			wacom->id[1] = PAD_DEVICE_ID;
> +			input_report_key(pad_input, BTN_0, (data[7] & 0x02));
> +			input_report_key(pad_input, BTN_1, (data[7] & 0x01));
> +			if (!prox)
> +				wacom->id[1] = 0;
> +			input_report_abs(pad_input, ABS_MISC, wacom->id[1]);
> +			retval = 1;
> +		}
> +		break;
> +	}
> +
> +	/* Store current battery capacity and power supply state */
> +	if (features->type == GRAPHIRE_BT) {
> +		rw = (data[7] >> 2 & 0x07);
> +		battery_capacity = batcap_gr[rw];
> +		ps_connected = rw == 7;
> +		if ((wacom->battery_capacity != battery_capacity) ||
> +		    (wacom->ps_connected != ps_connected)) {
> +			wacom->battery_capacity = battery_capacity;
> +			wacom->ps_connected = ps_connected;
> +			wacom_notify_battery(wacom);
> +		}
>  	}
>  exit:
>  	return retval;
> @@ -1418,6 +1477,7 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
>  
>  	case WACOM_G4:
>  	case GRAPHIRE:
> +	case GRAPHIRE_BT:
>  	case WACOM_MO:
>  		sync = wacom_graphire_irq(wacom_wac);
>  		break;
> @@ -1654,6 +1714,27 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
>  		__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
>  		break;
>  
> +	case GRAPHIRE_BT:
> +		__clear_bit(ABS_MISC, input_dev->absbit);
> +		input_set_abs_params(input_dev, ABS_DISTANCE, 0,
> +					      features->distance_max,
> +					      0, 0);
> +
> +		input_set_capability(input_dev, EV_REL, REL_WHEEL);
> +
> +		__set_bit(BTN_LEFT, input_dev->keybit);
> +		__set_bit(BTN_RIGHT, input_dev->keybit);
> +		__set_bit(BTN_MIDDLE, input_dev->keybit);
> +
> +		__set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
> +		__set_bit(BTN_TOOL_PEN, input_dev->keybit);
> +		__set_bit(BTN_TOOL_MOUSE, input_dev->keybit);
> +		__set_bit(BTN_STYLUS, input_dev->keybit);
> +		__set_bit(BTN_STYLUS2, input_dev->keybit);
> +
> +		__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
> +		break;
> +
>  	case WACOM_24HD:
>  		input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
>  		input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0);
> @@ -1848,6 +1929,11 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
>  	input_set_abs_params(input_dev, ABS_Y, 0, 1, 0, 0);
>  
>  	switch (features->type) {
> +	case GRAPHIRE_BT:
> +		__set_bit(BTN_0, input_dev->keybit);
> +		__set_bit(BTN_1, input_dev->keybit);
> +		break;
> +
>  	case WACOM_MO:
>  		__set_bit(BTN_BACK, input_dev->keybit);
>  		__set_bit(BTN_LEFT, input_dev->keybit);
> @@ -2017,6 +2103,9 @@ static const struct wacom_features wacom_features_0x00 =
>  static const struct wacom_features wacom_features_0x10 =
>  	{ "Wacom Graphire", 10206, 7422, 511, 63,
>  	  GRAPHIRE, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
> +static const struct wacom_features wacom_features_0x81 =
> +	{ "Wacom Graphire BT", 16704, 12064, 511, 32,
> +	  GRAPHIRE_BT, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
>  static const struct wacom_features wacom_features_0x11 =
>  	{ "Wacom Graphire2 4x5", 10206, 7422, 511, 63,
>  	  GRAPHIRE, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
> @@ -2412,6 +2501,10 @@ static const struct wacom_features wacom_features_0x309 =
>  	HID_DEVICE(BUS_USB, HID_GROUP_WACOM, USB_VENDOR_ID_WACOM, prod),\
>  	.driver_data = (kernel_ulong_t)&wacom_features_##prod
>  
> +#define BT_DEVICE_WACOM(prod)						\
> +	HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_WACOM, USB_VENDOR_ID_WACOM, prod),\
> +	.driver_data = (kernel_ulong_t)&wacom_features_##prod
> +
>  #define USB_DEVICE_LENOVO(prod)					\
>  	HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, prod),			\
>  	.driver_data = (kernel_ulong_t)&wacom_features_##prod
> @@ -2469,6 +2562,7 @@ const struct hid_device_id wacom_ids[] = {
>  	{ USB_DEVICE_WACOM(0x69) },
>  	{ USB_DEVICE_WACOM(0x6A) },
>  	{ USB_DEVICE_WACOM(0x6B) },
> +	{ BT_DEVICE_WACOM(0x81) },
>  	{ USB_DEVICE_WACOM(0x84) },
>  	{ USB_DEVICE_WACOM(0x90) },
>  	{ USB_DEVICE_WACOM(0x93) },
> diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
> index 3aa55d9..0f3df34 100644
> --- a/drivers/hid/wacom_wac.h
> +++ b/drivers/hid/wacom_wac.h
> @@ -46,6 +46,7 @@
>  
>  /* wacom data packet report IDs */
>  #define WACOM_REPORT_PENABLED		2
> +#define WACOM_REPORT_PENABLED_BT	3
>  #define WACOM_REPORT_INTUOSREAD		5
>  #define WACOM_REPORT_INTUOSWRITE	6
>  #define WACOM_REPORT_INTUOSPAD		12
> @@ -73,6 +74,7 @@
>  enum {
>  	PENPARTNER = 0,
>  	GRAPHIRE,
> +	GRAPHIRE_BT,
>  	WACOM_G4,
>  	PTU,
>  	PL,
> -- 
> 2.0.1
> 

-- 
Dmitry
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