[PATCH 48/51] Input: atmel_mxt_ts - Implement support for T100 touch object
From: Nick Dyer
Date: Thu Jun 27 2013 - 08:51:51 EST
The T100 object replaces the old T9 multitouch touchscreen object in new
chips.
Signed-off-by: Nick Dyer <nick.dyer@xxxxxxxxxxx>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 299 ++++++++++++++++++++++++++++--
1 file changed, 288 insertions(+), 11 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index b75cf38..cb6fe8f 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -67,6 +67,7 @@
#define MXT_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
#define MXT_PROCI_ACTIVE_STYLUS_T63 63
+#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
/* MXT_GEN_MESSAGE_T5 object */
#define MXT_RPTID_NOMSG 0xff
@@ -146,6 +147,23 @@ struct t9_range {
#define MXT_T63_STYLUS_PRESSURE_MASK 0x3F
+/* 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 */
@@ -209,6 +227,9 @@ 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;
@@ -244,6 +265,8 @@ struct mxt_data {
u8 T48_reportid;
u8 T63_reportid_min;
u8 T63_reportid_max;
+ u8 T100_reportid_min;
+ u8 T100_reportid_max;
/* for fw update in bootloader */
struct completion bl_completion;
@@ -780,6 +803,79 @@ 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;
+
+ /* do not report events if input device not yet registered */
+ if (!data->enable_reporting)
+ return;
+
+ 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) {
+ /* A reported size of zero indicates that the reported touch
+ * is a stylus from a linked Stylus T47 object. */
+ 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 void mxt_proc_t15_messages(struct mxt_data *data, u8 *msg)
{
struct input_dev *input_dev = data->input_dev;
@@ -916,6 +1012,9 @@ 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;
@@ -1582,6 +1681,12 @@ static void mxt_free_object_table(struct mxt_data *data)
data->raw_info_block = NULL;
kfree(data->msg_buf);
data->msg_buf = NULL;
+
+ if (data->input_dev) {
+ input_unregister_device(data->input_dev);
+ data->input_dev = NULL;
+ }
+
data->enable_reporting = false;
data->T5_address = 0;
data->T5_msg_size = 0;
@@ -1599,6 +1704,8 @@ static void mxt_free_object_table(struct mxt_data *data)
data->T48_reportid = 0;
data->T63_reportid_min = 0;
data->T63_reportid_max = 0;
+ data->T100_reportid_min = 0;
+ data->T100_reportid_max = 0;
data->max_reportid = 0;
}
@@ -1684,6 +1791,12 @@ static int mxt_parse_object_table(struct mxt_data *data)
data->num_stylusids = object->num_report_ids
* mxt_obj_instances(object);
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
@@ -1907,6 +2020,168 @@ fail:
data->use_regulator = false;
}
+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_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_initialize_t9_input_device(struct mxt_data *data);
+
static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
@@ -1969,6 +2244,18 @@ retry_bootloader:
goto err_free_object_table;
}
+ if (data->T9_reportid_min) {
+ error = mxt_initialize_t9_input_device(data);
+ if (error)
+ goto err_free_object_table;
+ } else if (data->T100_reportid_min) {
+ error = mxt_initialize_t100_input_device(data);
+ if (error)
+ goto err_free_object_table;
+ } else {
+ dev_warn(&client->dev, "No touch object detected\n");
+ }
+
data->enable_reporting = true;
return 0;
@@ -2493,24 +2780,15 @@ static int mxt_probe(struct i2c_client *client,
if (error)
goto err_free_irq;
- if (!data->in_bootloader) {
- error = mxt_initialize_t9_input_device(data);
- if (error)
- goto err_free_object;
- }
-
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
if (error) {
dev_err(&client->dev, "Failure %d creating sysfs group\n",
error);
- goto err_unregister_device;
+ goto err_free_object;
}
return 0;
-err_unregister_device:
- input_unregister_device(data->input_dev);
- data->input_dev = NULL;
err_free_object:
mxt_free_object_table(data);
err_free_irq:
@@ -2529,7 +2807,6 @@ static int mxt_remove(struct i2c_client *client)
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
free_irq(data->irq, data);
- input_unregister_device(data->input_dev);
regulator_put(data->reg_avdd);
regulator_put(data->reg_vdd);
mxt_free_object_table(data);
--
1.7.10.4
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