summaryrefslogtreecommitdiffstats
path: root/drivers/input/touchscreen/exc3000.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/input/touchscreen/exc3000.c')
-rw-r--r--drivers/input/touchscreen/exc3000.c253
1 files changed, 139 insertions, 114 deletions
diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index a6597f026980..cbe0dd412912 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -25,11 +25,13 @@
#define EXC3000_NUM_SLOTS 10
#define EXC3000_SLOTS_PER_FRAME 5
#define EXC3000_LEN_FRAME 66
+#define EXC3000_LEN_VENDOR_REQUEST 68
#define EXC3000_LEN_POINT 10
#define EXC3000_LEN_MODEL_NAME 16
#define EXC3000_LEN_FW_VERSION 16
+#define EXC3000_VENDOR_EVENT 0x03
#define EXC3000_MT1_EVENT 0x06
#define EXC3000_MT2_EVENT 0x18
@@ -76,9 +78,6 @@ struct exc3000_data {
u8 buf[2 * EXC3000_LEN_FRAME];
struct completion wait_event;
struct mutex query_lock;
- int query_result;
- char model[EXC3000_LEN_MODEL_NAME];
- char fw_version[EXC3000_LEN_FW_VERSION];
};
static void exc3000_report_slots(struct input_dev *input,
@@ -105,15 +104,16 @@ static void exc3000_timer(struct timer_list *t)
input_sync(data->input);
}
+static inline void exc3000_schedule_timer(struct exc3000_data *data)
+{
+ mod_timer(&data->timer, jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS));
+}
+
static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
{
struct i2c_client *client = data->client;
- u8 expected_event = EXC3000_MT1_EVENT;
int ret;
- if (data->info->max_xy == SZ_16K - 1)
- expected_event = EXC3000_MT2_EVENT;
-
ret = i2c_master_send(client, "'", 2);
if (ret < 0)
return ret;
@@ -131,175 +131,196 @@ static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
if (get_unaligned_le16(buf) != EXC3000_LEN_FRAME)
return -EINVAL;
- if (buf[2] != expected_event)
- return -EINVAL;
-
return 0;
}
-static int exc3000_read_data(struct exc3000_data *data,
- u8 *buf, int *n_slots)
+static int exc3000_handle_mt_event(struct exc3000_data *data)
{
- int error;
-
- error = exc3000_read_frame(data, buf);
- if (error)
- return error;
+ struct input_dev *input = data->input;
+ int ret, total_slots;
+ u8 *buf = data->buf;
- *n_slots = buf[3];
- if (!*n_slots || *n_slots > EXC3000_NUM_SLOTS)
- return -EINVAL;
+ total_slots = buf[3];
+ if (!total_slots || total_slots > EXC3000_NUM_SLOTS) {
+ ret = -EINVAL;
+ goto out_fail;
+ }
- if (*n_slots > EXC3000_SLOTS_PER_FRAME) {
+ if (total_slots > EXC3000_SLOTS_PER_FRAME) {
/* Read 2nd frame to get the rest of the contacts. */
- error = exc3000_read_frame(data, buf + EXC3000_LEN_FRAME);
- if (error)
- return error;
+ ret = exc3000_read_frame(data, buf + EXC3000_LEN_FRAME);
+ if (ret)
+ goto out_fail;
/* 2nd chunk must have number of contacts set to 0. */
- if (buf[EXC3000_LEN_FRAME + 3] != 0)
- return -EINVAL;
+ if (buf[EXC3000_LEN_FRAME + 3] != 0) {
+ ret = -EINVAL;
+ goto out_fail;
+ }
}
- return 0;
-}
-
-static int exc3000_query_interrupt(struct exc3000_data *data)
-{
- u8 *buf = data->buf;
- int error;
+ /*
+ * We read full state successfully, no contacts will be "stuck".
+ */
+ del_timer_sync(&data->timer);
- error = i2c_master_recv(data->client, buf, EXC3000_LEN_FRAME);
- if (error < 0)
- return error;
+ while (total_slots > 0) {
+ int slots = min(total_slots, EXC3000_SLOTS_PER_FRAME);
- if (buf[0] != 'B')
- return -EPROTO;
+ exc3000_report_slots(input, &data->prop, buf + 4, slots);
+ total_slots -= slots;
+ buf += EXC3000_LEN_FRAME;
+ }
- if (buf[4] == 'E')
- strlcpy(data->model, buf + 5, sizeof(data->model));
- else if (buf[4] == 'D')
- strlcpy(data->fw_version, buf + 5, sizeof(data->fw_version));
- else
- return -EPROTO;
+ input_mt_sync_frame(input);
+ input_sync(input);
return 0;
+
+out_fail:
+ /* Schedule a timer to release "stuck" contacts */
+ exc3000_schedule_timer(data);
+
+ return ret;
}
static irqreturn_t exc3000_interrupt(int irq, void *dev_id)
{
struct exc3000_data *data = dev_id;
- struct input_dev *input = data->input;
u8 *buf = data->buf;
- int slots, total_slots;
- int error;
-
- if (mutex_is_locked(&data->query_lock)) {
- data->query_result = exc3000_query_interrupt(data);
- complete(&data->wait_event);
- goto out;
- }
+ int ret;
- error = exc3000_read_data(data, buf, &total_slots);
- if (error) {
+ ret = exc3000_read_frame(data, buf);
+ if (ret) {
/* Schedule a timer to release "stuck" contacts */
- mod_timer(&data->timer,
- jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS));
+ exc3000_schedule_timer(data);
goto out;
}
- /*
- * We read full state successfully, no contacts will be "stuck".
- */
- del_timer_sync(&data->timer);
+ switch (buf[2]) {
+ case EXC3000_VENDOR_EVENT:
+ complete(&data->wait_event);
+ break;
- while (total_slots > 0) {
- slots = min(total_slots, EXC3000_SLOTS_PER_FRAME);
- exc3000_report_slots(input, &data->prop, buf + 4, slots);
- total_slots -= slots;
- buf += EXC3000_LEN_FRAME;
- }
+ case EXC3000_MT1_EVENT:
+ case EXC3000_MT2_EVENT:
+ exc3000_handle_mt_event(data);
+ break;
- input_mt_sync_frame(input);
- input_sync(input);
+ default:
+ break;
+ }
out:
return IRQ_HANDLED;
}
-static ssize_t fw_version_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static int exc3000_vendor_data_request(struct exc3000_data *data, u8 *request,
+ u8 request_len, u8 *response, int timeout)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct exc3000_data *data = i2c_get_clientdata(client);
- static const u8 request[68] = {
- 0x67, 0x00, 0x42, 0x00, 0x03, 0x01, 'D', 0x00
- };
- int error;
+ u8 buf[EXC3000_LEN_VENDOR_REQUEST] = { 0x67, 0x00, 0x42, 0x00, 0x03 };
+ int ret;
mutex_lock(&data->query_lock);
- data->query_result = -ETIMEDOUT;
reinit_completion(&data->wait_event);
- error = i2c_master_send(client, request, sizeof(request));
- if (error < 0) {
- mutex_unlock(&data->query_lock);
- return error;
+ buf[5] = request_len;
+ memcpy(&buf[6], request, request_len);
+
+ ret = i2c_master_send(data->client, buf, EXC3000_LEN_VENDOR_REQUEST);
+ if (ret < 0)
+ goto out_unlock;
+
+ if (response) {
+ ret = wait_for_completion_timeout(&data->wait_event,
+ timeout * HZ);
+ if (ret <= 0) {
+ ret = -ETIMEDOUT;
+ goto out_unlock;
+ }
+
+ if (data->buf[3] >= EXC3000_LEN_FRAME) {
+ ret = -ENOSPC;
+ goto out_unlock;
+ }
+
+ memcpy(response, &data->buf[4], data->buf[3]);
+ ret = data->buf[3];
}
- wait_for_completion_interruptible_timeout(&data->wait_event, 1 * HZ);
+out_unlock:
mutex_unlock(&data->query_lock);
- if (data->query_result < 0)
- return data->query_result;
-
- return sprintf(buf, "%s\n", data->fw_version);
+ return ret;
}
-static DEVICE_ATTR_RO(fw_version);
-static ssize_t exc3000_get_model(struct exc3000_data *data)
+static ssize_t fw_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- static const u8 request[68] = {
- 0x67, 0x00, 0x42, 0x00, 0x03, 0x01, 'E', 0x00
- };
- struct i2c_client *client = data->client;
- int error;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct exc3000_data *data = i2c_get_clientdata(client);
+ u8 response[EXC3000_LEN_FRAME];
+ int ret;
- mutex_lock(&data->query_lock);
- data->query_result = -ETIMEDOUT;
- reinit_completion(&data->wait_event);
+ /* query bootloader info */
+ ret = exc3000_vendor_data_request(data,
+ (u8[]){0x39, 0x02}, 2, response, 1);
+ if (ret < 0)
+ return ret;
- error = i2c_master_send(client, request, sizeof(request));
- if (error < 0) {
- mutex_unlock(&data->query_lock);
- return error;
- }
+ /*
+ * If the bootloader version is non-zero then the device is in
+ * bootloader mode and won't answer a query for the application FW
+ * version, so we just use the bootloader version info.
+ */
+ if (response[2] || response[3])
+ return sprintf(buf, "%d.%d\n", response[2], response[3]);
- wait_for_completion_interruptible_timeout(&data->wait_event, 1 * HZ);
- mutex_unlock(&data->query_lock);
+ ret = exc3000_vendor_data_request(data, (u8[]){'D'}, 1, response, 1);
+ if (ret < 0)
+ return ret;
- return data->query_result;
+ return sprintf(buf, "%s\n", &response[1]);
}
+static DEVICE_ATTR_RO(fw_version);
static ssize_t model_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct exc3000_data *data = i2c_get_clientdata(client);
- int error;
+ u8 response[EXC3000_LEN_FRAME];
+ int ret;
- error = exc3000_get_model(data);
- if (error < 0)
- return error;
+ ret = exc3000_vendor_data_request(data, (u8[]){'E'}, 1, response, 1);
+ if (ret < 0)
+ return ret;
- return sprintf(buf, "%s\n", data->model);
+ return sprintf(buf, "%s\n", &response[1]);
}
static DEVICE_ATTR_RO(model);
+static ssize_t type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct exc3000_data *data = i2c_get_clientdata(client);
+ u8 response[EXC3000_LEN_FRAME];
+ int ret;
+
+ ret = exc3000_vendor_data_request(data, (u8[]){'F'}, 1, response, 1);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%s\n", &response[1]);
+}
+static DEVICE_ATTR_RO(type);
+
static struct attribute *sysfs_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_model.attr,
+ &dev_attr_type.attr,
NULL
};
@@ -379,9 +400,15 @@ static int exc3000_probe(struct i2c_client *client)
* or two touch events anyways).
*/
for (retry = 0; retry < 3; retry++) {
- error = exc3000_get_model(data);
- if (!error)
+ u8 response[EXC3000_LEN_FRAME];
+
+ error = exc3000_vendor_data_request(data, (u8[]){'E'}, 1,
+ response, 1);
+ if (error > 0) {
+ dev_dbg(&client->dev, "TS Model: %s", &response[1]);
+ error = 0;
break;
+ }
dev_warn(&client->dev, "Retry %d get EETI EXC3000 model: %d\n",
retry + 1, error);
}
@@ -389,8 +416,6 @@ static int exc3000_probe(struct i2c_client *client)
if (error)
return error;
- dev_dbg(&client->dev, "TS Model: %s", data->model);
-
i2c_set_clientdata(client, data);
error = devm_device_add_group(&client->dev, &exc3000_attribute_group);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-02 22:26:05 +0100