| Message ID | 1464097434-10063-3-git-send-email-stephenjust@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hi Stephen, On May 24 2016 or thereabouts, Stephen Just wrote: > This change creates a second input device which will handle input from > a Surface Pen. The Surface Pen supplies a different packet header than > touch events, so it is simple to handle one or the other. > > This patch handles both the newer Surface Pen with one button, and the > older variant with a second button to switch to Eraser mode. > > Signed-off-by: Stephen Just <stephenjust@gmail.com> > --- > drivers/input/touchscreen/surface3_spi.c | 111 ++++++++++++++++++++++++++++++- > 1 file changed, 109 insertions(+), 2 deletions(-) > > diff --git a/drivers/input/touchscreen/surface3_spi.c b/drivers/input/touchscreen/surface3_spi.c > index 204a162..665b02c 100644 > --- a/drivers/input/touchscreen/surface3_spi.c > +++ b/drivers/input/touchscreen/surface3_spi.c > @@ -28,11 +28,13 @@ > #define SURFACE3_PACKET_SIZE 264 > > #define SURFACE3_REPORT_TOUCH 0xd2 > +#define SURFACE3_REPORT_PEN 0x16 > > struct surface3_ts_data { > struct spi_device *spi; > struct gpio_desc *gpiod_rst[2]; > struct input_dev *input_dev; > + struct input_dev *pen_input_dev; > > u8 rd_buf[SURFACE3_PACKET_SIZE] ____cacheline_aligned; > }; > @@ -49,6 +51,14 @@ struct surface3_ts_data_finger { > u32 padding; > } __packed; > > +struct surface3_ts_data_pen { > + u8 status; > + __le16 x; > + __le16 y; > + __le16 pressure; > + u8 padding; > +} __packed; > + > static int surface3_spi_read(struct surface3_ts_data *ts_data) > { > struct spi_device *spi = ts_data->spi; > @@ -114,6 +124,52 @@ static void surface3_spi_process_touch(struct surface3_ts_data *ts_data, u8 *dat > input_sync(ts_data->input_dev); > } > > +static void surface3_spi_report_pen(struct surface3_ts_data *ts_data, > + struct surface3_ts_data_pen *pen) > +{ > + int st = pen->status; > + int prox = st & 0x01; > + int rubber = st & 0x18; > + > + input_report_key(ts_data->pen_input_dev, > + BTN_TOUCH, > + (st & 0x12)); > + > + input_report_key(ts_data->pen_input_dev, > + BTN_TOOL_PEN, > + prox && !rubber); > + > + input_report_key(ts_data->pen_input_dev, > + BTN_TOOL_RUBBER, > + prox && rubber); I just had a call with Peter, and I noticed a small issue here (see https://bugs.freedesktop.org/show_bug.cgi?id=96182) On the out of proximity event, we switches back from tool_pen and release the tool_rubber in the very same frame, and this messes things in user space. I first thought it was easier to fix libinput, but this behavior (having a tool in/out prox in its own prox) is the de facto standard and the current stylus (new style) behavior will break xorg-evdev, xorg-wacom and libinput. Would you mind adding a check in the driver if the tool changed and add the input_sync() accordingly? Cheers, Benjamin > + > + if (st) { > + input_report_key(ts_data->pen_input_dev, > + BTN_STYLUS, > + st & 0x04); > + > + input_report_abs(ts_data->pen_input_dev, > + ABS_X, > + get_unaligned_le16(&pen->x)); > + input_report_abs(ts_data->pen_input_dev, > + ABS_Y, > + get_unaligned_le16(&pen->y)); > + input_report_abs(ts_data->pen_input_dev, > + ABS_PRESSURE, > + get_unaligned_le16(&pen->pressure)); > + } > +} > + > +static void surface3_spi_process_pen(struct surface3_ts_data *ts_data, u8 *data) > +{ > + struct surface3_ts_data_pen *pen; > + > + pen = (struct surface3_ts_data_pen *)&data[15]; > + > + surface3_spi_report_pen(ts_data, pen); > + input_sync(ts_data->pen_input_dev); > +} > + > static void surface3_spi_process(struct surface3_ts_data *ts_data) > { > const char header[] = {0xff, 0xff, 0xff, 0xff, 0xa5, 0x5a, 0xe7, 0x7e, 0x01}; > @@ -125,12 +181,19 @@ static void surface3_spi_process(struct surface3_ts_data *ts_data) > "%s header error: %*ph, ignoring...\n", > __func__, (int)sizeof(header), data); > > - if (data[9] == SURFACE3_REPORT_TOUCH) > + switch (data[9]) { > + case SURFACE3_REPORT_TOUCH: > surface3_spi_process_touch(ts_data, data); > - else > + break; > + case SURFACE3_REPORT_PEN: > + surface3_spi_process_pen(ts_data, data); > + break; > + default: > dev_err(&ts_data->spi->dev, > "%s unknown packet type: %x, ignoring...\n", > __func__, data[9]); > + break; > + } > } > > static irqreturn_t surface3_spi_irq_handler(int irq, void *dev_id) > @@ -224,6 +287,46 @@ static int surface3_spi_create_touch_input(struct surface3_ts_data *data) > return 0; > } > > +static int surface3_spi_create_pen_input(struct surface3_ts_data *data) > +{ > + struct input_dev *input; > + int error; > + > + input = devm_input_allocate_device(&data->spi->dev); > + if (!input) > + return -ENOMEM; > + > + data->pen_input_dev = input; > + > + __set_bit(INPUT_PROP_DIRECT, input->propbit); > + __set_bit(INPUT_PROP_POINTER, input->propbit); > + input_set_abs_params(input, ABS_X, 0, 9600, 0, 0); > + input_abs_set_res(input, ABS_X, 40); > + input_set_abs_params(input, ABS_Y, 0, 7200, 0, 0); > + input_abs_set_res(input, ABS_Y, 48); > + input_set_abs_params(input, ABS_PRESSURE, 0, 1024, 0, 0); > + input_set_capability(input, EV_KEY, BTN_TOUCH); > + input_set_capability(input, EV_KEY, BTN_STYLUS); > + input_set_capability(input, EV_KEY, BTN_TOOL_PEN); > + input_set_capability(input, EV_KEY, BTN_TOOL_RUBBER); > + > + input->name = "Surface3 SPI Pen Input"; > + input->phys = "input/ts"; > + input->id.bustype = BUS_SPI; > + input->id.vendor = 0x045e; /* Microsoft */ > + input->id.product = 0x0002; > + input->id.version = 0x0000; > + > + error = input_register_device(input); > + if (error) { > + dev_err(&data->spi->dev, > + "Failed to register input device: %d", error); > + return error; > + } > + > + return 0; > +} > + > static int surface3_spi_probe(struct spi_device *spi) > { > struct surface3_ts_data *data; > @@ -255,6 +358,10 @@ static int surface3_spi_probe(struct spi_device *spi) > if (error) > return error; > > + error = surface3_spi_create_pen_input(data); > + if (error) > + return error; > + > error = devm_request_threaded_irq(&spi->dev, spi->irq, > NULL, surface3_spi_irq_handler, > IRQF_ONESHOT, > -- > 2.8.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/input/touchscreen/surface3_spi.c b/drivers/input/touchscreen/surface3_spi.c index 204a162..665b02c 100644 --- a/drivers/input/touchscreen/surface3_spi.c +++ b/drivers/input/touchscreen/surface3_spi.c @@ -28,11 +28,13 @@ #define SURFACE3_PACKET_SIZE 264 #define SURFACE3_REPORT_TOUCH 0xd2 +#define SURFACE3_REPORT_PEN 0x16 struct surface3_ts_data { struct spi_device *spi; struct gpio_desc *gpiod_rst[2]; struct input_dev *input_dev; + struct input_dev *pen_input_dev; u8 rd_buf[SURFACE3_PACKET_SIZE] ____cacheline_aligned; }; @@ -49,6 +51,14 @@ struct surface3_ts_data_finger { u32 padding; } __packed; +struct surface3_ts_data_pen { + u8 status; + __le16 x; + __le16 y; + __le16 pressure; + u8 padding; +} __packed; + static int surface3_spi_read(struct surface3_ts_data *ts_data) { struct spi_device *spi = ts_data->spi; @@ -114,6 +124,52 @@ static void surface3_spi_process_touch(struct surface3_ts_data *ts_data, u8 *dat input_sync(ts_data->input_dev); } +static void surface3_spi_report_pen(struct surface3_ts_data *ts_data, + struct surface3_ts_data_pen *pen) +{ + int st = pen->status; + int prox = st & 0x01; + int rubber = st & 0x18; + + input_report_key(ts_data->pen_input_dev, + BTN_TOUCH, + (st & 0x12)); + + input_report_key(ts_data->pen_input_dev, + BTN_TOOL_PEN, + prox && !rubber); + + input_report_key(ts_data->pen_input_dev, + BTN_TOOL_RUBBER, + prox && rubber); + + if (st) { + input_report_key(ts_data->pen_input_dev, + BTN_STYLUS, + st & 0x04); + + input_report_abs(ts_data->pen_input_dev, + ABS_X, + get_unaligned_le16(&pen->x)); + input_report_abs(ts_data->pen_input_dev, + ABS_Y, + get_unaligned_le16(&pen->y)); + input_report_abs(ts_data->pen_input_dev, + ABS_PRESSURE, + get_unaligned_le16(&pen->pressure)); + } +} + +static void surface3_spi_process_pen(struct surface3_ts_data *ts_data, u8 *data) +{ + struct surface3_ts_data_pen *pen; + + pen = (struct surface3_ts_data_pen *)&data[15]; + + surface3_spi_report_pen(ts_data, pen); + input_sync(ts_data->pen_input_dev); +} + static void surface3_spi_process(struct surface3_ts_data *ts_data) { const char header[] = {0xff, 0xff, 0xff, 0xff, 0xa5, 0x5a, 0xe7, 0x7e, 0x01}; @@ -125,12 +181,19 @@ static void surface3_spi_process(struct surface3_ts_data *ts_data) "%s header error: %*ph, ignoring...\n", __func__, (int)sizeof(header), data); - if (data[9] == SURFACE3_REPORT_TOUCH) + switch (data[9]) { + case SURFACE3_REPORT_TOUCH: surface3_spi_process_touch(ts_data, data); - else + break; + case SURFACE3_REPORT_PEN: + surface3_spi_process_pen(ts_data, data); + break; + default: dev_err(&ts_data->spi->dev, "%s unknown packet type: %x, ignoring...\n", __func__, data[9]); + break; + } } static irqreturn_t surface3_spi_irq_handler(int irq, void *dev_id) @@ -224,6 +287,46 @@ static int surface3_spi_create_touch_input(struct surface3_ts_data *data) return 0; } +static int surface3_spi_create_pen_input(struct surface3_ts_data *data) +{ + struct input_dev *input; + int error; + + input = devm_input_allocate_device(&data->spi->dev); + if (!input) + return -ENOMEM; + + data->pen_input_dev = input; + + __set_bit(INPUT_PROP_DIRECT, input->propbit); + __set_bit(INPUT_PROP_POINTER, input->propbit); + input_set_abs_params(input, ABS_X, 0, 9600, 0, 0); + input_abs_set_res(input, ABS_X, 40); + input_set_abs_params(input, ABS_Y, 0, 7200, 0, 0); + input_abs_set_res(input, ABS_Y, 48); + input_set_abs_params(input, ABS_PRESSURE, 0, 1024, 0, 0); + input_set_capability(input, EV_KEY, BTN_TOUCH); + input_set_capability(input, EV_KEY, BTN_STYLUS); + input_set_capability(input, EV_KEY, BTN_TOOL_PEN); + input_set_capability(input, EV_KEY, BTN_TOOL_RUBBER); + + input->name = "Surface3 SPI Pen Input"; + input->phys = "input/ts"; + input->id.bustype = BUS_SPI; + input->id.vendor = 0x045e; /* Microsoft */ + input->id.product = 0x0002; + input->id.version = 0x0000; + + error = input_register_device(input); + if (error) { + dev_err(&data->spi->dev, + "Failed to register input device: %d", error); + return error; + } + + return 0; +} + static int surface3_spi_probe(struct spi_device *spi) { struct surface3_ts_data *data; @@ -255,6 +358,10 @@ static int surface3_spi_probe(struct spi_device *spi) if (error) return error; + error = surface3_spi_create_pen_input(data); + if (error) + return error; + error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, surface3_spi_irq_handler, IRQF_ONESHOT,
This change creates a second input device which will handle input from a Surface Pen. The Surface Pen supplies a different packet header than touch events, so it is simple to handle one or the other. This patch handles both the newer Surface Pen with one button, and the older variant with a second button to switch to Eraser mode. Signed-off-by: Stephen Just <stephenjust@gmail.com> --- drivers/input/touchscreen/surface3_spi.c | 111 ++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 2 deletions(-)