diff options
| author | Daniel Kurtz <djkurtz@chromium.org> | 2012-06-28 21:08:24 +0800 |
|---|---|---|
| committer | Henrik Rydberg <rydberg@euromail.se> | 2012-06-29 15:58:07 +0200 |
| commit | fdf804210f297b7a114fa7a216c2ab65b0f693da (patch) | |
| tree | 40a167a3f0b51713d4c4a7df305c0e4f013f9707 | |
| parent | 64464ae8e1d64fc9f63d9686d5e40b56ffa77203 (diff) | |
Input: atmel_mxt_ts - parse T6 reports
The normal messages sent after boot or NVRAM update are T6 reports,
containing a status, and the config memory checksum. Parse them and dump
a useful info message.
This patch tested on an MXT224E.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 4c9a06c7eae3..37190ab1f817 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -248,6 +248,7 @@ struct mxt_data { unsigned int max_y; /* Cached parameters from object table */ + u8 T6_reportid; u8 T9_reportid_min; u8 T9_reportid_max; }; @@ -549,6 +550,11 @@ static void mxt_input_touchevent(struct mxt_data *data, } } +static unsigned mxt_extract_T6_csum(const u8 *csum) +{ + return csum[0] | (csum[1] << 8) | (csum[2] << 16); +} + static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg) { u8 id = msg->reportid; @@ -559,8 +565,8 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id) { struct mxt_data *data = dev_id; struct mxt_message message; + const u8 *payload = &message.message[0]; struct device *dev = &data->client->dev; - int id; u8 reportid; bool update_input = false; @@ -572,9 +578,13 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id) reportid = message.reportid; - id = reportid - data->T9_reportid_min; - - if (mxt_is_T9_message(data, &message)) { + if (reportid == data->T6_reportid) { + u8 status = payload[0]; + unsigned csum = mxt_extract_T6_csum(&payload[1]); + dev_dbg(dev, "Status: %02x Config Checksum: %06x\n", + status, csum); + } else if (mxt_is_T9_message(data, &message)) { + int id = reportid - data->T9_reportid_min; mxt_input_touchevent(data, &message, id); update_input = true; } else { @@ -749,6 +759,9 @@ static int mxt_get_object_table(struct mxt_data *data) object->instances + 1, min_id, max_id); switch (object->type) { + case MXT_GEN_COMMAND_T6: + data->T6_reportid = min_id; + break; case MXT_TOUCH_MULTI_T9: data->T9_reportid_min = min_id; data->T9_reportid_max = max_id; @@ -763,8 +776,10 @@ static void mxt_free_object_table(struct mxt_data *data) { kfree(data->object_table); data->object_table = NULL; + data->T6_reportid = 0; data->T9_reportid_min = 0; data->T9_reportid_max = 0; + } static int mxt_initialize(struct mxt_data *data) |