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SubjectRe: [PATCH v2 07/10] Input - wacom: handle Graphire BT tablets in wacom.ko
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@redhat.com>
> ---
>
> 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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