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authorJJ Ding <jj_ding@emc.com.tw>2011-09-20 22:42:51 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-09-20 22:46:27 -0700
commit84a90b610a1473d732818ec5d041ab18eae77f14 (patch)
tree23826221db7299bcce38f3ad35d4c42bd46531ad
parent1dc6edec127e1fdb89d246189c232fe635d2f921 (diff)
Input: elantech - better support all those v2 variants
V2 hardware has many variants. This patch adddresses two issues: - some model also has debounce packets, but with a different signature than v3. Now we just check debounce for all v2 hardware. - due to different scanning methods the hardware uses, x and y ranges have to be calculated differently. And for some specific versions, we can just see them as custom-made, so set {x, y} the same values as Windows driver does. Signed-off-by: JJ Ding <jj_ding@emc.com.tw> Tested-by: Richard Schütz <r.schtz@t-online.de> Reviewed-by: Éric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
-rw-r--r--drivers/input/mouse/elantech.c46
-rw-r--r--drivers/input/mouse/elantech.h1
2 files changed, 42 insertions, 5 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index b8733b377266..c2d91ebbadf4 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -613,6 +613,18 @@ static int elantech_packet_check_v1(struct psmouse *psmouse)
etd->parity[packet[3]] == p3;
}
+static int elantech_debounce_check_v2(struct psmouse *psmouse)
+{
+ /*
+ * When we encounter packet that matches this exactly, it means the
+ * hardware is in debounce status. Just ignore the whole packet.
+ */
+ const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff };
+ unsigned char *packet = psmouse->packet;
+
+ return !memcmp(packet, debounce_packet, sizeof(debounce_packet));
+}
+
static int elantech_packet_check_v2(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
@@ -708,6 +720,10 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
break;
case 2:
+ /* ignore debounce */
+ if (elantech_debounce_check_v2(psmouse))
+ return PSMOUSE_FULL_PACKET;
+
if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
return PSMOUSE_BAD_DATA;
@@ -825,7 +841,6 @@ static int elantech_set_range(struct psmouse *psmouse,
struct elantech_data *etd = psmouse->private;
unsigned char param[3];
unsigned char traces;
- int i;
switch (etd->hw_version) {
case 1:
@@ -844,12 +859,33 @@ static int elantech_set_range(struct psmouse *psmouse,
*x_max = ETP_XMAX_V2;
*y_max = ETP_YMAX_V2;
} else {
+ int i;
+ int fixed_dpi;
+
i = (etd->fw_version > 0x020800 &&
etd->fw_version < 0x020900) ? 1 : 2;
- *x_min = 0;
- *y_min = 0;
- *x_max = (etd->capabilities[1] - i) * 64;
- *y_max = (etd->capabilities[2] - i) * 64;
+
+ if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+ return -1;
+
+ fixed_dpi = param[1] & 0x10;
+
+ if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
+ if (synaptics_send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
+ return -1;
+
+ *x_max = (etd->capabilities[1] - i) * param[1] / 2;
+ *y_max = (etd->capabilities[2] - i) * param[2] / 2;
+ } else if (etd->fw_version == 0x040216) {
+ *x_max = 819;
+ *y_max = 405;
+ } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
+ *x_max = 900;
+ *y_max = 500;
+ } else {
+ *x_max = (etd->capabilities[1] - i) * 64;
+ *y_max = (etd->capabilities[2] - i) * 64;
+ }
}
break;
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 7ecaef0c07c4..9e5f1aabea7e 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -19,6 +19,7 @@
#define ETP_FW_ID_QUERY 0x00
#define ETP_FW_VERSION_QUERY 0x01
#define ETP_CAPABILITIES_QUERY 0x02
+#define ETP_SAMPLE_QUERY 0x03
/*
* Command values for register reading or writing