Add support for the new T100 object which replaces the previous T9 multitouch
touchscreen object in recent maXTouch devices. T100 provides improved
reporting with selectable auxiliary information, and a type field for
hover/stylus/glove reporting.
Signed-off-by: Nick Dyer <[email protected]>
Acked-by: Yufeng Shen <[email protected]>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 326 ++++++++++++++++++++++++++++++-
1 file changed, 323 insertions(+), 3 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index bb07020..569346e 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -79,6 +79,7 @@
#define MXT_SPT_DIGITIZER_T43 43
#define MXT_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
+#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
/* MXT_GEN_MESSAGE_T5 object */
#define MXT_RPTID_NOMSG 0xff
@@ -188,6 +189,33 @@ struct t9_range {
#define MXT_RESET_VALUE 0x01
#define MXT_BACKUP_VALUE 0x55
+/* T100 Multiple Touch Touchscreen */
+#define MXT_T100_CTRL 0
+#define MXT_T100_CFG1 1
+#define MXT_T100_TCHAUX 3
+#define MXT_T100_XRANGE 13
+#define MXT_T100_YRANGE 24
+
+#define MXT_T100_CFG_SWITCHXY (1 << 5)
+
+#define MXT_T100_TCHAUX_VECT (1 << 0)
+#define MXT_T100_TCHAUX_AMPL (1 << 1)
+#define MXT_T100_TCHAUX_AREA (1 << 2)
+
+#define MXT_T100_DETECT (1 << 7)
+#define MXT_T100_TYPE_MASK 0x70
+
+enum t100_type {
+ MXT_T100_TYPE_FINGER = 1,
+ MXT_T100_TYPE_PASSIVE_STYLUS = 2,
+ MXT_T100_TYPE_HOVERING_FINGER = 4,
+ MXT_T100_TYPE_GLOVE = 5,
+ MXT_T100_TYPE_LARGE_TOUCH = 6,
+};
+
+#define MXT_TOUCH_MAJOR_DEFAULT 1
+#define MXT_PRESSURE_DEFAULT 1
+
/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
#define MXT_RESET_TIME 200 /* msec */
@@ -247,6 +275,9 @@ struct mxt_data {
unsigned int max_y;
bool in_bootloader;
u16 mem_size;
+ u8 t100_aux_ampl;
+ u8 t100_aux_area;
+ u8 t100_aux_vect;
u8 max_reportid;
u32 config_crc;
u32 info_crc;
@@ -268,6 +299,8 @@ struct mxt_data {
u8 T9_reportid_max;
u8 T19_reportid;
u16 T44_address;
+ u8 T100_reportid_min;
+ u8 T100_reportid_max;
/* for fw update in bootloader */
struct completion bl_completion;
@@ -761,6 +794,113 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
data->update_input = true;
}
+static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
+{
+ struct device *dev = &data->client->dev;
+ struct input_dev *input_dev = data->input_dev;
+ int id;
+ u8 status;
+ u8 type;
+ int x;
+ int y;
+ int tool;
+ u8 major = 0;
+ u8 pressure = 0;
+ u8 orientation = 0;
+ bool active = false;
+ bool hover = false;
+
+ id = message[0] - data->T100_reportid_min - 2;
+
+ /* ignore SCRSTATUS events */
+ if (id < 0)
+ return;
+
+ status = message[1];
+ x = (message[3] << 8) | message[2];
+ y = (message[5] << 8) | message[4];
+
+ if (status & MXT_T100_DETECT) {
+ type = (status & MXT_T100_TYPE_MASK) >> 4;
+
+ switch (type) {
+ case MXT_T100_TYPE_HOVERING_FINGER:
+ hover = true;
+ /* fall through */
+ case MXT_T100_TYPE_FINGER:
+ case MXT_T100_TYPE_GLOVE:
+ active = true;
+ tool = MT_TOOL_FINGER;
+
+ if (data->t100_aux_area)
+ major = message[data->t100_aux_area];
+ if (data->t100_aux_ampl)
+ pressure = message[data->t100_aux_ampl];
+ if (data->t100_aux_vect)
+ orientation = message[data->t100_aux_vect];
+
+ break;
+
+ case MXT_T100_TYPE_PASSIVE_STYLUS:
+ active = true;
+ tool = MT_TOOL_PEN;
+
+ /* Passive stylus is reported with size zero so
+ * hardcode */
+ major = MXT_TOUCH_MAJOR_DEFAULT;
+
+ if (data->t100_aux_ampl)
+ pressure = message[data->t100_aux_ampl];
+
+ break;
+
+ case MXT_T100_TYPE_LARGE_TOUCH:
+ /* Ignore suppressed touch */
+ break;
+
+ default:
+ dev_dbg(dev, "Unexpected T100 type\n");
+ return;
+ }
+ }
+
+ if (hover) {
+ pressure = 0;
+ major = 0;
+ } else if (active) {
+ /*
+ * Values reported should be non-zero if tool is touching the
+ * device
+ */
+ if (pressure == 0)
+ pressure = MXT_PRESSURE_DEFAULT;
+
+ if (major == 0)
+ major = MXT_TOUCH_MAJOR_DEFAULT;
+ }
+
+ input_mt_slot(input_dev, id);
+
+ if (active) {
+ dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
+ id, type, x, y, major, pressure, orientation);
+
+ input_mt_report_slot_state(input_dev, tool, 1);
+ input_report_abs(input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
+ input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
+ input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
+ } else {
+ dev_dbg(dev, "[%u] release\n", id);
+
+ /* close out slot */
+ input_mt_report_slot_state(input_dev, 0, 0);
+ }
+
+ data->update_input = true;
+}
+
static int mxt_proc_message(struct mxt_data *data, u8 *message)
{
u8 report_id = message[0];
@@ -779,6 +919,9 @@ static int mxt_proc_message(struct mxt_data *data, u8 *message)
} else if (report_id >= data->T9_reportid_min
&& report_id <= data->T9_reportid_max) {
mxt_proc_t9_message(data, message);
+ } else if (report_id >= data->T100_reportid_min
+ && report_id <= data->T100_reportid_max) {
+ mxt_proc_t100_message(data, message);
} else if (report_id == data->T19_reportid) {
mxt_input_button(data, message);
data->update_input = true;
@@ -1401,6 +1544,8 @@ static void mxt_free_object_table(struct mxt_data *data)
data->T9_reportid_max = 0;
data->T19_reportid = 0;
data->T44_address = 0;
+ data->T100_reportid_min = 0;
+ data->T100_reportid_max = 0;
data->max_reportid = 0;
}
@@ -1488,6 +1633,12 @@ static int mxt_get_object_table(struct mxt_data *data)
case MXT_SPT_GPIOPWM_T19:
data->T19_reportid = min_id;
break;
+ case MXT_TOUCH_MULTITOUCHSCREEN_T100:
+ data->T100_reportid_min = min_id;
+ data->T100_reportid_max = max_id;
+ /* first two report IDs reserved */
+ data->num_touchids = object->num_report_ids - 2;
+ break;
}
end_address = object->start_address
@@ -1668,6 +1819,167 @@ err_free_mem:
return error;
}
+static int mxt_read_t100_config(struct mxt_data *data)
+{
+ struct i2c_client *client = data->client;
+ int error;
+ struct mxt_object *object;
+ u16 range_x, range_y;
+ u8 cfg, tchaux;
+ u8 aux;
+
+ object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
+ if (!object)
+ return -EINVAL;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_XRANGE,
+ sizeof(range_x), &range_x);
+ if (error)
+ return error;
+
+ le16_to_cpus(&range_x);
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_YRANGE,
+ sizeof(range_y), &range_y);
+ if (error)
+ return error;
+
+ le16_to_cpus(&range_y);
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_CFG1,
+ 1, &cfg);
+ if (error)
+ return error;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_TCHAUX,
+ 1, &tchaux);
+ if (error)
+ return error;
+
+ /* Handle default values */
+ if (range_x == 0)
+ range_x = 1023;
+
+ /* Handle default values */
+ if (range_x == 0)
+ range_x = 1023;
+
+ if (range_y == 0)
+ range_y = 1023;
+
+ if (cfg & MXT_T100_CFG_SWITCHXY) {
+ data->max_x = range_y;
+ data->max_y = range_x;
+ } else {
+ data->max_x = range_x;
+ data->max_y = range_y;
+ }
+
+ /* allocate aux bytes */
+ aux = 6;
+
+ if (tchaux & MXT_T100_TCHAUX_VECT)
+ data->t100_aux_vect = aux++;
+
+ if (tchaux & MXT_T100_TCHAUX_AMPL)
+ data->t100_aux_ampl = aux++;
+
+ if (tchaux & MXT_T100_TCHAUX_AREA)
+ data->t100_aux_area = aux++;
+
+ dev_dbg(&client->dev,
+ "T100 aux mappings vect:%u ampl:%u area:%u\n",
+ data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
+
+ dev_info(&client->dev,
+ "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
+
+ return 0;
+}
+
+static int mxt_initialize_t100_input_device(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ struct input_dev *input_dev;
+ int error;
+
+ error = mxt_read_t100_config(data);
+ if (error)
+ dev_warn(dev, "Failed to initialize T9 resolution\n");
+
+ input_dev = input_allocate_device();
+ if (!data || !input_dev) {
+ dev_err(dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name = "atmel_mxt_ts T100 touchscreen";
+
+ input_dev->phys = data->phys;
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent = &data->client->dev;
+ input_dev->open = mxt_input_open;
+ input_dev->close = mxt_input_close;
+
+ set_bit(EV_ABS, input_dev->evbit);
+ input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
+
+ /* For single touch */
+ input_set_abs_params(input_dev, ABS_X,
+ 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y,
+ 0, data->max_y, 0, 0);
+
+ if (data->t100_aux_ampl)
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ 0, 255, 0, 0);
+
+ /* For multi touch */
+ error = input_mt_init_slots(input_dev, data->num_touchids, 0);
+ if (error) {
+ dev_err(dev, "Error %d initialising slots\n", error);
+ goto err_free_mem;
+ }
+
+ input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+ 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+ 0, data->max_y, 0, 0);
+
+ if (data->t100_aux_area)
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MXT_MAX_AREA, 0, 0);
+
+ if (data->t100_aux_ampl)
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 0, 255, 0, 0);
+
+ if (data->t100_aux_vect)
+ input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
+ 0, 255, 0, 0);
+
+ input_set_drvdata(input_dev, data);
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(dev, "Error %d registering input device\n", error);
+ goto err_free_mem;
+ }
+
+ data->input_dev = input_dev;
+
+ return 0;
+
+err_free_mem:
+ input_free_device(input_dev);
+ return error;
+}
+
static int mxt_configure_objects(struct mxt_data *data,
const struct firmware *cfg);
@@ -1815,9 +2127,17 @@ static int mxt_configure_objects(struct mxt_data *data,
return error;
}
- error = mxt_initialize_t9_input_device(data);
- if (error)
- return error;
+ if (data->T9_reportid_min) {
+ error = mxt_initialize_t9_input_device(data);
+ if (error)
+ return error;
+ } else if (data->T100_reportid_min) {
+ error = mxt_initialize_t100_input_device(data);
+ if (error)
+ return error;
+ } else {
+ dev_warn(dev, "No touch object detected\n");
+ }
dev_info(dev,
"Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
--
1.9.1
Hi Nick
On Tue, Dec 9, 2014 at 12:16 PM, Nick Dyer <[email protected]> wrote:
> Add support for the new T100 object which replaces the previous T9 multitouch
> touchscreen object in recent maXTouch devices. T100 provides improved
> reporting with selectable auxiliary information, and a type field for
> hover/stylus/glove reporting.
>
> Signed-off-by: Nick Dyer <[email protected]>
> Acked-by: Yufeng Shen <[email protected]>
> ---
> drivers/input/touchscreen/atmel_mxt_ts.c | 326 ++++++++++++++++++++++++++++++-
> 1 file changed, 323 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index bb07020..569346e 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
> @@ -79,6 +79,7 @@
> #define MXT_SPT_DIGITIZER_T43 43
> #define MXT_SPT_MESSAGECOUNT_T44 44
> #define MXT_SPT_CTECONFIG_T46 46
> +#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
>
> /* MXT_GEN_MESSAGE_T5 object */
> #define MXT_RPTID_NOMSG 0xff
> @@ -188,6 +189,33 @@ struct t9_range {
> #define MXT_RESET_VALUE 0x01
> #define MXT_BACKUP_VALUE 0x55
>
> +/* T100 Multiple Touch Touchscreen */
> +#define MXT_T100_CTRL 0
> +#define MXT_T100_CFG1 1
> +#define MXT_T100_TCHAUX 3
> +#define MXT_T100_XRANGE 13
> +#define MXT_T100_YRANGE 24
> +
> +#define MXT_T100_CFG_SWITCHXY (1 << 5)
> +
> +#define MXT_T100_TCHAUX_VECT (1 << 0)
> +#define MXT_T100_TCHAUX_AMPL (1 << 1)
> +#define MXT_T100_TCHAUX_AREA (1 << 2)
> +
> +#define MXT_T100_DETECT (1 << 7)
> +#define MXT_T100_TYPE_MASK 0x70
> +
> +enum t100_type {
> + MXT_T100_TYPE_FINGER = 1,
> + MXT_T100_TYPE_PASSIVE_STYLUS = 2,
> + MXT_T100_TYPE_HOVERING_FINGER = 4,
> + MXT_T100_TYPE_GLOVE = 5,
> + MXT_T100_TYPE_LARGE_TOUCH = 6,
> +};
> +
> +#define MXT_TOUCH_MAJOR_DEFAULT 1
> +#define MXT_PRESSURE_DEFAULT 1
> +
> /* Delay times */
> #define MXT_BACKUP_TIME 50 /* msec */
> #define MXT_RESET_TIME 200 /* msec */
> @@ -247,6 +275,9 @@ struct mxt_data {
> unsigned int max_y;
> bool in_bootloader;
> u16 mem_size;
> + u8 t100_aux_ampl;
> + u8 t100_aux_area;
> + u8 t100_aux_vect;
> u8 max_reportid;
> u32 config_crc;
> u32 info_crc;
> @@ -268,6 +299,8 @@ struct mxt_data {
> u8 T9_reportid_max;
> u8 T19_reportid;
> u16 T44_address;
> + u8 T100_reportid_min;
> + u8 T100_reportid_max;
>
> /* for fw update in bootloader */
> struct completion bl_completion;
> @@ -761,6 +794,113 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
> data->update_input = true;
> }
>
> +static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
> +{
> + struct device *dev = &data->client->dev;
> + struct input_dev *input_dev = data->input_dev;
> + int id;
> + u8 status;
> + u8 type;
> + int x;
> + int y;
> + int tool;
> + u8 major = 0;
> + u8 pressure = 0;
> + u8 orientation = 0;
> + bool active = false;
> + bool hover = false;
> +
> + id = message[0] - data->T100_reportid_min - 2;
> +
> + /* ignore SCRSTATUS events */
> + if (id < 0)
> + return;
> +
> + status = message[1];
> + x = (message[3] << 8) | message[2];
> + y = (message[5] << 8) | message[4];
> +
> + if (status & MXT_T100_DETECT) {
> + type = (status & MXT_T100_TYPE_MASK) >> 4;
> +
> + switch (type) {
> + case MXT_T100_TYPE_HOVERING_FINGER:
> + hover = true;
> + /* fall through */
> + case MXT_T100_TYPE_FINGER:
> + case MXT_T100_TYPE_GLOVE:
> + active = true;
> + tool = MT_TOOL_FINGER;
> +
> + if (data->t100_aux_area)
> + major = message[data->t100_aux_area];
> + if (data->t100_aux_ampl)
> + pressure = message[data->t100_aux_ampl];
> + if (data->t100_aux_vect)
> + orientation = message[data->t100_aux_vect];
> +
> + break;
> +
> + case MXT_T100_TYPE_PASSIVE_STYLUS:
> + active = true;
> + tool = MT_TOOL_PEN;
> +
> + /* Passive stylus is reported with size zero so
> + * hardcode */
> + major = MXT_TOUCH_MAJOR_DEFAULT;
> +
> + if (data->t100_aux_ampl)
> + pressure = message[data->t100_aux_ampl];
> +
> + break;
> +
> + case MXT_T100_TYPE_LARGE_TOUCH:
> + /* Ignore suppressed touch */
> + break;
> +
> + default:
> + dev_dbg(dev, "Unexpected T100 type\n");
> + return;
> + }
> + }
> +
> + if (hover) {
> + pressure = 0;
> + major = 0;
> + } else if (active) {
> + /*
> + * Values reported should be non-zero if tool is touching the
> + * device
> + */
> + if (pressure == 0)
> + pressure = MXT_PRESSURE_DEFAULT;
> +
> + if (major == 0)
> + major = MXT_TOUCH_MAJOR_DEFAULT;
> + }
> +
> + input_mt_slot(input_dev, id);
> +
> + if (active) {
> + dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
> + id, type, x, y, major, pressure, orientation);
> +
> + input_mt_report_slot_state(input_dev, tool, 1);
> + input_report_abs(input_dev, ABS_MT_POSITION_X, x);
> + input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
> + input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
> + input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
> + input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
> + } else {
> + dev_dbg(dev, "[%u] release\n", id);
> +
> + /* close out slot */
> + input_mt_report_slot_state(input_dev, 0, 0);
> + }
> +
> + data->update_input = true;
> +}
> +
Dmitry and Chung-Yih have had some discussion about how to handle
hovering fingers, and I think the direction they wanted to go was to
use ABS_MT_DISTANCE instead.
http://www.spinics.net/lists/linux-input/msg33950.html
Chung-Yih's also done some work on the forked chromeos-kernel driver
for this as well, if you want to see :
https://chromium-review.googlesource.com/#/c/219280/
--
Benson Leung
Software Engineer, Chrom* OS
[email protected]
Hi Benson-
On 18/12/14 18:49, Benson Leung wrote:
> Dmitry and Chung-Yih have had some discussion about how to handle
> hovering fingers, and I think the direction they wanted to go was to
> use ABS_MT_DISTANCE instead.
>
> http://www.spinics.net/lists/linux-input/msg33950.html
Thanks for flagging this up. The patch I submitted is written against the
Android touch devices spec, which treats ABS_MT_PRESSURE being zero as
hover, but indeed currently the handling of BTN_TOUCH when using
input_mt_report_pointer_emaultion() won't be quite right.
I will have a look at straightening this out and re-post.
cheers
Nick