From: Nick Dyer <nick.d...@itdev.co.uk>
The T100 object replaces the old T9 multitouch touchscreen object in new
chips. This patch was cherry-picked from the Atmel touch downstream tree
The original patch had different initialization functions for the T9 and
T100 multi-touch input devices but there was a lot of code duplicated so
the code was refactored to make the T9 dev init function more generic to
support different multi-touch object types.
T9 and T100 initialization logic is kept as it was in the original patch
since there is no public documentation about the different object types.
Signed-off-by: Nick Dyer <nick.d...@itdev.co.uk>
Acked-by: Yufeng Shen <mile...@chromium.org>
[javier: Factor out T9 and T100 routines to have a common init function]
Signed-off-by: Javier Martinez Canillas <javier.marti...@collabora.co.uk>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 258 +++++++++++++++++++++++++++++--
1 file changed, 241 insertions(+), 17 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c
b/drivers/input/touchscreen/atmel_mxt_ts.c
index bb07020..aaa9e07 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
@@ -138,6 +139,9 @@ struct t9_range {
/* MXT_TOUCH_MULTI_T9 orient */
#define MXT_T9_ORIENT_SWITCH (1 << 0)
+/* T47 Stylus */
+#define MXT_TOUCH_MAJOR_T47_STYLUS 1
+
/* MXT_PROCI_GRIPFACE_T20 field */
#define MXT_GRIPFACE_CTRL 0
#define MXT_GRIPFACE_XLOGRIP 1
@@ -188,6 +192,23 @@ 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
+#define MXT_T100_TYPE_STYLUS 0x20
+
/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
#define MXT_RESET_TIME 200 /* msec */
@@ -247,6 +268,9 @@ 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 +292,8 @@ 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 +787,72 @@ 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;
+ int x;
+ int y;
+ int tool;
+
+ 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];
+
+ dev_dbg(dev,
+ "[%u] status:%02X x:%u y:%u area:%02X amp:%02X vec:%02X\n",
+ id,
+ status,
+ x, y,
+ data->t100_aux_area ? message[data->t100_aux_area] : 0,
+ data->t100_aux_ampl ? message[data->t100_aux_ampl] : 0,
+ data->t100_aux_vect ? message[data->t100_aux_vect] : 0);
+
+ input_mt_slot(input_dev, id);
+
+ if (status & MXT_T100_DETECT) {
+ if ((status & MXT_T100_TYPE_MASK) == MXT_T100_TYPE_STYLUS)
+ tool = MT_TOOL_PEN;
+ else
+ tool = MT_TOOL_FINGER;
+
+ /* Touch active */
+ 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);
+
+ if (data->t100_aux_ampl)
+ input_report_abs(input_dev, ABS_MT_PRESSURE,
+ message[data->t100_aux_ampl]);
+
+ if (data->t100_aux_area) {
+ if (tool == MT_TOOL_PEN)
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+ MXT_TOUCH_MAJOR_T47_STYLUS);
+ else
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+ message[data->t100_aux_area]);
+ }
+
+ if (data->t100_aux_vect)
+ input_report_abs(input_dev, ABS_MT_ORIENTATION,
+ message[data->t100_aux_vect]);
+ } else {
+ /* Touch no longer active, close out slot */
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
+ }
+
+ data->update_input = true;
+}
+
static int mxt_proc_message(struct mxt_data *data, u8 *message)
{
u8 report_id = message[0];
@@ -779,6 +871,9 @@ 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 +1496,8 @@ 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 +1585,12 @@ 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
@@ -1572,10 +1675,88 @@ static int mxt_read_t9_resolution(struct mxt_data *data)
return 0;
}
+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_info(&client->dev,
+ "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
+
+ return 0;
+}
+
static int mxt_input_open(struct input_dev *dev);
static void mxt_input_close(struct input_dev *dev);
-static int mxt_initialize_t9_input_device(struct mxt_data *data)
+static int mxt_initialize_input_device(struct mxt_data *data, int multitouch)
{
struct device *dev = &data->client->dev;
const struct mxt_platform_data *pdata = data->pdata;
@@ -1585,9 +1766,23 @@ static int mxt_initialize_t9_input_device(struct
mxt_data *data)
unsigned int mt_flags = 0;
int i;
- error = mxt_read_t9_resolution(data);
- if (error)
- dev_warn(dev, "Failed to initialize T9 resolution\n");
+ switch (multitouch) {
+ case MXT_TOUCH_MULTI_T9:
+ num_mt_slots = data->T9_reportid_max - data->T9_reportid_min +
1;
+ error = mxt_read_t9_resolution(data);
+ if (error)
+ dev_warn(dev, "Failed to initialize T9 resolution\n");
+ break;
+ case MXT_TOUCH_MULTITOUCHSCREEN_T100:
+ num_mt_slots = data->num_touchids;
+ error = mxt_read_t100_config(data);
+ if (error)
+ dev_warn(dev, "Failed to read T100 config\n");
+ break;
+ default:
+ dev_err(dev, "Invalid multitouch object\n");
+ return -EINVAL;
+ }
input_dev = input_allocate_device();
if (!input_dev) {
@@ -1602,9 +1797,8 @@ static int mxt_initialize_t9_input_device(struct mxt_data
*data)
input_dev->open = mxt_input_open;
input_dev->close = mxt_input_close;
- __set_bit(EV_ABS, input_dev->evbit);
- __set_bit(EV_KEY, input_dev->evbit);
- __set_bit(BTN_TOUCH, input_dev->keybit);
+ set_bit(EV_ABS, input_dev->evbit);
+ input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
if (pdata->t19_num_keys) {
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
@@ -1631,25 +1825,45 @@ static int mxt_initialize_t9_input_device(struct
mxt_data *data)
0, data->max_x, 0, 0);
input_set_abs_params(input_dev, ABS_Y,
0, data->max_y, 0, 0);
- input_set_abs_params(input_dev, ABS_PRESSURE,
- 0, 255, 0, 0);
+
+ if (multitouch == MXT_TOUCH_MULTI_T9 ||
+ (multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_ampl))
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ 0, 255, 0, 0);
/* For multi touch */
- num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
if (error) {
dev_err(dev, "Error %d initialising slots\n", error);
goto err_free_mem;
}
- input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
- 0, MXT_MAX_AREA, 0, 0);
+ if (multitouch == MXT_TOUCH_MULTI_T9 ||
+ (multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_area))
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MXT_MAX_AREA, 0, 0);
+
+ if (multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100)
+ 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);
- input_set_abs_params(input_dev, ABS_MT_PRESSURE,
- 0, 255, 0, 0);
+
+ if (multitouch == MXT_TOUCH_MULTI_T9 ||
+ (multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_ampl))
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 0, 255, 0, 0);
+
+ if (multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+ data->t100_aux_vect)
+ input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
+ 0, 255, 0, 0);
input_set_drvdata(input_dev, data);
@@ -1801,6 +2015,7 @@ static int mxt_configure_objects(struct mxt_data *data,
{
struct device *dev = &data->client->dev;
struct mxt_info *info = &data->info;
+ int multitouch = 0;
int error;
if (cfg) {
@@ -1815,9 +2030,18 @@ 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)
+ multitouch = MXT_TOUCH_MULTI_T9;
+ else if (data->T100_reportid_min)
+ multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
+
+ if (multitouch) {
+ error = mxt_initialize_input_device(data, multitouch);
+ 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",
--
2.1.3
--
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