Re: [PATCH] HID: wacom: add full support of the Wacom Bamboo PAD

From: Benjamin Tissoires
Date: Sat Feb 21 2015 - 08:23:04 EST

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In reply to: Benjamin Tissoires: "Re: [PATCH] HID: wacom: add full support of the Wacom Bamboo PAD"
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On Feb 21 2015 or thereabouts, jsanchezf wrote:
> You mean the kernel that worked before the thing broke? That would be 3.16,
> without any patch whatsoever, is that right?

No, sorry. I meant a plain 3.18 (you need a 3.17 at least to have the
device handled by hid and 3.18 to have wacom picked up when your device
shows up).

Or, you can also just use the wacom out-of-the-tree driver, without my
patch to support the bamboo pad.

>
> Sorry, I don't have my tablet with me right now but I'll mail you the
> recorded data to you this afteenoon. Any particular motion, or something I
> should try? I'm assuming you just need touch input / pad buttons, right?

Yes. I am actually more interested in the description of the device, but
having some events will help too.

Cheers,
Benjamin

> On Feb 18 2015 or thereabouts, jsanchezf wrote:
> > > So could you run "sudo hid-recorder /dev/hidraw*" while making some
> > > inputs on the touchpad?
> >
> > Moving my finger and pressing the buttons on the touchpad seemed to show
> no
> > events on hid-recorder. This is the full log for it:
> > http://pastebin.com/YqZfkvLy
> >
> > I just realised maybe you meant stylus input, so this is another log with
> > some stylus input on it: http://pastebin.com/WSCY6Zq0
> >
>
> Arf, it looks like the wacom driver ignores the debug interface.
> Can you re-run hid-recorder on all interfaces with the stock 3.19 kernel
> (or whichever you had that allowed the pen to work, but without my
> latest patches).
>
> Cheers,
> Benjamin
>
> >
> >
> > 2015-02-18 23:07 GMT+01:00 Benjamin Tissoires <
> benjamin.tissoires@xxxxxxxxxx
> > >:
> >
> > > On Feb 18 2015 or thereabouts, jsanchezf wrote:
> > > > Hello Benjamin
> > > >
> > > > Following your instructions I managed to compile and install the wacom
> > > > module properly (actually I had to run automake and autoconf to make
> it
> > > all
> > > > work but no problems after that).
> > > >
> > > > The stylus is working just fine now. Unfortunately the touch pad part
> > > > doesn't seem to be working at all, and Xorg isn't mapping it to an
> event
> > > > file like it used to. The stylus event file is not seeing any data
> when I
> > > > touch the pad either.
> > > >
> > > > By the way, I'm actually using the USB variant of the Bamboo Pad.
> > > >
> > >
> > > Yep, I know. That's why I asked you to test :)
> > >
> > > So could you run "sudo hid-recorder /dev/hidraw*" while making some
> > > inputs on the touchpad?
> > >
> > > I'd like to check if your touchpad is actually switched to the debug
> > > mode.
> > >
> > > Cheers,
> > > Benjamin
> > >
> > > > Looking at the log file from Xorg, though, I can see how it's properly
> > > > detecting the "Wacom USB Bamboo PAD Pen stylus" device and adding
> "Wacom
> > > > USB Bamboo PAD Pen touch" as an extended input device. Here's the full
> > > log:
> > > > http://pastebin.com/k3SqtQN5
> > > >
> > > > I should mention I have no Xorg configuration done whatsoever besides
> the
> > > > monitor resolution setup (which is not really relevant
> > > >
> > > >
> > > >
> > > > 2015-02-17 20:27 GMT+01:00 Benjamin Tissoires <
> > > benjamin.tissoires@xxxxxxxxxx
> > > > >:
> > > >
> > > > > The stylus of this device works just fine out of the box.
> > > > > The touch is seen by default as a mouse with relative events and
> some
> > > > > gestures.
> > > > > Switching the default in raw mode allows us to retrieve the touch
> data
> > > > > and have a consistent user experience accross all the multitouch
> > > touchpads.
> > > > >
> > > > > Note that the buttons of this devices are reported through the touch
> > > > > interface. There is no 'Pad' interface. It seemed more natural to
> have
> > > > > the BTN_LEFT and BTN_RIGHT reported with the touch because they are
> > > > > placed under the touch interface and it looks like they belong to
> the
> > > > > touch part.
> > > > >
> > > > > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
> > > > > ---
> > > > >
> > > > > Hi,
> > > > >
> > > > > several things before we can merge this:
> > > > >
> > > > > Josep, Frederic:
> > > > > Would you mind testing this patch with your Bamboo pads? I bought
> the
> > > > > wireless
> > > > > variant and the USB one has a different ProductID. Hopefully, it
> will
> > > go
> > > > > smoothly with the current patch.
> > > > >
> > > > > Peter, Ping, Jason:
> > > > > Given the nature of the device, I did not exported the 2 buttons as
> a
> > > > > separate
> > > > > pad device.
> > > > > Do you back me up with this choice?
> > > > >
> > > > > Jiri:
> > > > > As mentioned to Josep and Frederic, this has not been tested against
> > > the
> > > > > USB
> > > > > (wired) version of the device. So please wait at least for one
> > > tested-by
> > > > > before
> > > > > considering including this patch.
> > > > >
> > > > > Thanks everyone!
> > > > > Benjamin
> > > > >
> > > > > drivers/hid/wacom_sys.c | 23 ++++++++++++++++++
> > > > > drivers/hid/wacom_wac.c | 62
> > > > > +++++++++++++++++++++++++++++++++++++++++++++++++
> > > > > drivers/hid/wacom_wac.h | 3 +++
> > > > > 3 files changed, 88 insertions(+)
> > > > >
> > > > > diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
> > > > > index e1ec192..ef4d147 100644
> > > > > --- a/drivers/hid/wacom_sys.c
> > > > > +++ b/drivers/hid/wacom_sys.c
> > > > > @@ -410,6 +410,9 @@ static int wacom_query_tablet_data(struct
> > > hid_device
> > > > > *hdev,
> > > > > else if (features->type == WACOM_27QHDT) {
> > > > > return wacom_set_device_mode(hdev, 131, 3,
> 2);
> > > > > }
> > > > > + else if (features->type == BAMBOO_PAD) {
> > > > > + return wacom_set_device_mode(hdev, 2, 2, 3);
> > > > > + }
> > > > > } else if (features->device_type == BTN_TOOL_PEN) {
> > > > > if (features->type <= BAMBOO_PT && features->type !=
> > > > > WIRELESS) {
> > > > > return wacom_set_device_mode(hdev, 2, 2, 2);
> > > > > @@ -1417,6 +1420,20 @@ static int wacom_probe(struct hid_device
> *hdev,
> > > > > goto fail_allocate_inputs;
> > > > > }
> > > > >
> > > > > + /*
> > > > > + * Bamboo Pad has a generic hid handling for the Pen, and we
> > > > > switch it
> > > > > + * into debug mode for the touch part.
> > > > > + * We ignore the other interfaces.
> > > > > + */
> > > > > + if (features->type == BAMBOO_PAD) {
> > > > > + if (features->pktlen == WACOM_PKGLEN_PENABLED) {
> > > > > + features->type = HID_GENERIC;
> > > > > + } else if (features->pktlen !=
> WACOM_PKGLEN_BP_TOUCH) {
> > > > > + error = -ENODEV;
> > > > > + goto fail_shared_data;
> > > > > + }
> > > > > + }
> > > > > +
> > > > > /* set the default size in case we do not get them from hid
> */
> > > > > wacom_set_default_phy(features);
> > > > >
> > > > > @@ -1451,6 +1468,12 @@ static int wacom_probe(struct hid_device
> *hdev,
> > > > > features->y_max = 4096;
> > > > > }
> > > > >
> > > > > + /*
> > > > > + * Same thing for Bamboo PAD
> > > > > + */
> > > > > + if (features->type == BAMBOO_PAD)
> > > > > + features->device_type = BTN_TOOL_FINGER;
> > > > > +
> > > > > if (hdev->bus == BUS_BLUETOOTH)
> > > > > features->quirks |= WACOM_QUIRK_BATTERY;
> > > > >
> > > > > diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
> > > > > index 1a65079..8627581 100644
> > > > > --- a/drivers/hid/wacom_wac.c
> > > > > +++ b/drivers/hid/wacom_wac.c
> > > > > @@ -1826,6 +1826,49 @@ static int wacom_bpt_irq(struct wacom_wac
> > > *wacom,
> > > > > size_t len)
> > > > > return 0;
> > > > > }
> > > > >
> > > > > +static int wacom_bamboo_pad_irq(struct wacom_wac *wacom, size_t
> len)
> > > > > +{
> > > > > + struct input_dev *input = wacom->input;
> > > > > + unsigned char *data = wacom->data;
> > > > > + unsigned char *finger_data, prefix;
> > > > > + unsigned id;
> > > > > + int x, y;
> > > > > + bool valid;
> > > > > +
> > > > > + /* bit 2 in data[1] is set when there is touch information
> > > > > available */
> > > > > + if ((len != WACOM_PKGLEN_BP_TOUCH) ||
> > > > > + (data[0] != WACOM_REPORT_BP_TOUCH) ||
> > > > > + !(data[1] & 0x02))
> > > > > + return 0;
> > > > > +
> > > > > + prefix = data[9];
> > > > > +
> > > > > + for (id = 0; id < wacom->features.touch_max; id++) {
> > > > > + valid = !!(prefix & BIT(id)) &&
> > > > > + !wacom->shared->stylus_in_proximity;
> > > > > +
> > > > > + input_mt_slot(input, id);
> > > > > + input_mt_report_slot_state(input, MT_TOOL_FINGER,
> > > valid);
> > > > > +
> > > > > + if (!valid)
> > > > > + continue;
> > > > > +
> > > > > + finger_data = data + 10 + id * 3;
> > > > > + x = finger_data[0] | ((finger_data[1] & 0x0f) << 8);
> > > > > + y = (finger_data[2] << 4) | (finger_data[1] >> 4);
> > > > > +
> > > > > + input_report_abs(input, ABS_MT_POSITION_X, x);
> > > > > + input_report_abs(input, ABS_MT_POSITION_Y, y);
> > > > > + }
> > > > > +
> > > > > + input_mt_sync_frame(input);
> > > > > +
> > > > > + input_report_key(input, BTN_LEFT, prefix & 0x40);
> > > > > + input_report_key(input, BTN_RIGHT, prefix & 0x80);
> > > > > +
> > > > > + return 1;
> > > > > +}
> > > > > +
> > > > > static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
> > > > > {
> > > > > unsigned char *data = wacom->data;
> > > > > @@ -1962,6 +2005,10 @@ void wacom_wac_irq(struct wacom_wac
> *wacom_wac,
> > > > > size_t len)
> > > > > sync = wacom_bpt_irq(wacom_wac, len);
> > > > > break;
> > > > >
> > > > > + case BAMBOO_PAD:
> > > > > + sync = wacom_bamboo_pad_irq(wacom_wac, len);
> > > > > + break;
> > > > > +
> > > > > case WIRELESS:
> > > > > sync = wacom_wireless_irq(wacom_wac, len);
> > > > > break;
> > > > > @@ -2300,6 +2347,13 @@ int
> > > wacom_setup_pentouch_input_capabilities(struct
> > > > > input_dev *input_dev,
> > > > > 0, 0);
> > > > > }
> > > > > break;
> > > > > + case BAMBOO_PAD:
> > > > > + __clear_bit(ABS_MISC, input_dev->absbit);
> > > > > + input_mt_init_slots(input_dev, features->touch_max,
> > > > > + INPUT_MT_POINTER);
> > > > > + __set_bit(BTN_LEFT, input_dev->keybit);
> > > > > + __set_bit(BTN_RIGHT, input_dev->keybit);
> > > > > + break;
> > > > > }
> > > > > return 0;
> > > > > }
> > > > > @@ -2953,6 +3007,12 @@ static const struct wacom_features
> > > > > wacom_features_0x30C =
> > > > > { "Wacom ISDv5 30C", .type = WACOM_24HDT, /* Touch */
> > > > > .oVid = USB_VENDOR_ID_WACOM, .oPid = 0x30A, .touch_max =
> 10,
> > > > > .check_for_hid_type = true, .hid_type = HID_TYPE_USBNONE
> };
> > > > > +static const struct wacom_features wacom_features_0x318 =
> > > > > + { "Wacom USB Bamboo PAD", 4095, 4095, /* Touch */
> > > > > + .type = BAMBOO_PAD, 35, 48, .touch_max = 4 };
> > > > > +static const struct wacom_features wacom_features_0x319 =
> > > > > + { "Wacom Wireless Bamboo PAD", 4095, 4095, /* Touch */
> > > > > + .type = BAMBOO_PAD, 35, 48, .touch_max = 4 };
> > > > > static const struct wacom_features wacom_features_0x323 =
> > > > > { "Wacom Intuos P M", 21600, 13500, 1023, 31,
> > > > > INTUOSHT, WACOM_INTUOS_RES, WACOM_INTUOS_RES,
> > > > > @@ -3101,6 +3161,8 @@ const struct hid_device_id wacom_ids[] = {
> > > > > { USB_DEVICE_WACOM(0x314) },
> > > > > { USB_DEVICE_WACOM(0x315) },
> > > > > { USB_DEVICE_WACOM(0x317) },
> > > > > + { USB_DEVICE_WACOM(0x318) },
> > > > > + { USB_DEVICE_WACOM(0x319) },
> > > > > { USB_DEVICE_WACOM(0x323) },
> > > > > { USB_DEVICE_WACOM(0x32A) },
> > > > > { USB_DEVICE_WACOM(0x32B) },
> > > > > diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
> > > > > index 021ee1c..bf43e0f 100644
> > > > > --- a/drivers/hid/wacom_wac.h
> > > > > +++ b/drivers/hid/wacom_wac.h
> > > > > @@ -33,6 +33,7 @@
> > > > > #define WACOM_PKGLEN_MTTPC 40
> > > > > #define WACOM_PKGLEN_DTUS 68
> > > > > #define WACOM_PKGLEN_PENABLED 8
> > > > > +#define WACOM_PKGLEN_BP_TOUCH 32
> > > > >
> > > > > /* wacom data size per MT contact */
> > > > > #define WACOM_BYTES_PER_MT_PACKET 11
> > > > > @@ -67,6 +68,7 @@
> > > > > #define WACOM_REPORT_24HDT 1
> > > > > #define WACOM_REPORT_WL 128
> > > > > #define WACOM_REPORT_USB 192
> > > > > +#define WACOM_REPORT_BP_TOUCH 16
> > > > >
> > > > > /* device quirks */
> > > > > #define WACOM_QUIRK_MULTI_INPUT 0x0001
> > > > > @@ -122,6 +124,7 @@ enum {
> > > > > BAMBOO_PT,
> > > > > WACOM_24HDT,
> > > > > WACOM_27QHDT,
> > > > > + BAMBOO_PAD,
> > > > > TABLETPC, /* add new TPC below */
> > > > > TABLETPCE,
> > > > > TABLETPC2FG,
> > > > > --
> > > > > 2.1.0
> > > > >
> > > > >
> > >
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