Input: elantech - add v3 hardware support
v3 hardware's packet format is almost identical to v2 (one/three finger touch),
except when sensing two finger touch, the hardware sends 12 bytes of data.
Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Acked-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 1ab1c14..9cfc70a 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -108,6 +108,16 @@
rc = -1;
}
break;
+
+ case 3:
+ if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, reg) ||
+ elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
+ rc = -1;
+ }
+ break;
}
if (rc)
@@ -154,6 +164,18 @@
rc = -1;
}
break;
+
+ case 3:
+ if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, reg) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, val) ||
+ elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
+ rc = -1;
+ }
+ break;
}
if (rc)
@@ -350,6 +372,84 @@
input_sync(dev);
}
+/*
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 3. (12 byte packets for two fingers)
+ */
+static void elantech_report_absolute_v3(struct psmouse *psmouse,
+ int packet_type)
+{
+ struct input_dev *dev = psmouse->dev;
+ struct elantech_data *etd = psmouse->private;
+ unsigned char *packet = psmouse->packet;
+ unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
+ unsigned int width = 0, pres = 0;
+
+ /* byte 0: n1 n0 . . . . R L */
+ fingers = (packet[0] & 0xc0) >> 6;
+
+ switch (fingers) {
+ case 3:
+ case 1:
+ /*
+ * byte 1: . . . . x11 x10 x9 x8
+ * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
+ */
+ x1 = ((packet[1] & 0x0f) << 8) | packet[2];
+ /*
+ * byte 4: . . . . y11 y10 y9 y8
+ * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
+ */
+ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
+ break;
+
+ case 2:
+ if (packet_type == PACKET_V3_HEAD) {
+ /*
+ * byte 1: . . . . ax11 ax10 ax9 ax8
+ * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
+ */
+ etd->prev_x = ((packet[1] & 0x0f) << 8) | packet[2];
+ /*
+ * byte 4: . . . . ay11 ay10 ay9 ay8
+ * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
+ */
+ etd->prev_y = etd->y_max -
+ (((packet[4] & 0x0f) << 8) | packet[5]);
+ /*
+ * wait for next packet
+ */
+ return;
+ }
+
+ /* packet_type == PACKET_V3_TAIL */
+ x1 = etd->prev_x;
+ y1 = etd->prev_y;
+ x2 = ((packet[1] & 0x0f) << 8) | packet[2];
+ y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
+ break;
+ }
+
+ pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
+ width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
+
+ input_report_key(dev, BTN_TOUCH, fingers != 0);
+ if (fingers != 0) {
+ input_report_abs(dev, ABS_X, x1);
+ input_report_abs(dev, ABS_Y, y1);
+ }
+ elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
+ input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
+ input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
+ input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
+ input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+ input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+ input_report_abs(dev, ABS_PRESSURE, pres);
+ input_report_abs(dev, ABS_TOOL_WIDTH, width);
+
+ input_sync(dev);
+}
+
static int elantech_packet_check_v1(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
@@ -403,11 +503,37 @@
}
/*
+ * We check the constant bits to determine what packet type we get,
+ * so packet checking is mandatory for v3 hardware.
+ */
+static int elantech_packet_check_v3(struct psmouse *psmouse)
+{
+ const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff };
+ unsigned char *packet = psmouse->packet;
+
+ /*
+ * check debounce first, it has the same signature in byte 0
+ * and byte 3 as PACKET_V3_HEAD.
+ */
+ if (!memcmp(packet, debounce_packet, sizeof(debounce_packet)))
+ return PACKET_DEBOUNCE;
+
+ if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02)
+ return PACKET_V3_HEAD;
+
+ if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c)
+ return PACKET_V3_TAIL;
+
+ return PACKET_UNKNOWN;
+}
+
+/*
* Process byte stream from mouse and handle complete packets
*/
static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
+ int packet_type;
if (psmouse->pktcnt < psmouse->pktsize)
return PSMOUSE_GOOD_DATA;
@@ -429,6 +555,18 @@
elantech_report_absolute_v2(psmouse);
break;
+
+ case 3:
+ packet_type = elantech_packet_check_v3(psmouse);
+ /* ignore debounce */
+ if (packet_type == PACKET_DEBOUNCE)
+ return PSMOUSE_FULL_PACKET;
+
+ if (packet_type == PACKET_UNKNOWN)
+ return PSMOUSE_BAD_DATA;
+
+ elantech_report_absolute_v3(psmouse, packet_type);
+ break;
}
return PSMOUSE_FULL_PACKET;
@@ -463,8 +601,15 @@
elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
rc = -1;
- break;
}
+ break;
+
+ case 3:
+ etd->reg_10 = 0x0b;
+ if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
+ rc = -1;
+
+ break;
}
if (rc == 0) {
@@ -498,11 +643,12 @@
return rc;
}
-static void elantech_set_range(struct psmouse *psmouse,
- unsigned int *x_min, unsigned int *y_min,
- unsigned int *x_max, unsigned int *y_max)
+static int elantech_set_range(struct psmouse *psmouse,
+ unsigned int *x_min, unsigned int *y_min,
+ unsigned int *x_max, unsigned int *y_max)
{
struct elantech_data *etd = psmouse->private;
+ unsigned char param[3];
int i;
switch (etd->hw_version) {
@@ -530,19 +676,30 @@
*y_max = (etd->capabilities[2] - i) * 64;
}
break;
+
+ case 3:
+ if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+ return -1;
+
+ *x_max = (0x0f & param[0]) << 8 | param[1];
+ *y_max = (0xf0 & param[0]) << 4 | param[2];
+ break;
}
+
+ return 0;
}
/*
* Set the appropriate event bits for the input subsystem
*/
-static void elantech_set_input_params(struct psmouse *psmouse)
+static int elantech_set_input_params(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0;
- elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max);
+ if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max))
+ return -1;
__set_bit(EV_KEY, dev->evbit);
__set_bit(EV_ABS, dev->evbit);
@@ -570,6 +727,9 @@
case 2:
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
+ __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
+ /* fall through */
+ case 3:
input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
if (etd->reports_pressure) {
@@ -578,7 +738,6 @@
input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
ETP_WMAX_V2, 0, 0);
}
- __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
input_mt_init_slots(dev, 2);
input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
@@ -586,6 +745,8 @@
}
etd->y_max = y_max;
+
+ return 0;
}
struct elantech_attr_data {
@@ -727,7 +888,8 @@
* Report this in case there are Elantech models that use a different
* set of magic numbers
*/
- if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) {
+ if (param[0] != 0x3c || param[1] != 0x03 ||
+ (param[2] != 0xc8 && param[2] != 0x00)) {
pr_debug("unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
param[0], param[1], param[2]);
return -1;
@@ -793,16 +955,16 @@
/*
* determine hardware version and set some properties according to it.
*/
-static void elantech_set_properties(struct elantech_data *etd)
+static int elantech_set_properties(struct elantech_data *etd)
{
- /*
- * Assume every version greater than 0x020030 is new EeePC style
- * hardware with 6 byte packets, except 0x020600
- */
if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
etd->hw_version = 1;
- else
+ else if (etd->fw_version < 0x150600)
etd->hw_version = 2;
+ else if ((etd->fw_version & 0x0f0000) >> 16 == 5)
+ etd->hw_version = 3;
+ else
+ return -1;
/*
* Turn on packet checking by default.
@@ -817,13 +979,15 @@
etd->jumpy_cursor =
(etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
- if (etd->hw_version == 2) {
+ if (etd->hw_version > 1) {
/* For now show extra debug information */
etd->debug = 1;
if (etd->fw_version >= 0x020800)
etd->reports_pressure = true;
}
+
+ return 0;
}
/*
@@ -850,9 +1014,12 @@
pr_err("failed to query firmware version.\n");
goto init_fail;
}
-
etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
- elantech_set_properties(etd);
+
+ if (elantech_set_properties(etd)) {
+ pr_err("unknown hardware version, aborting...\n");
+ goto init_fail;
+ }
pr_info("assuming hardware version %d "
"(with firmware version 0x%02x%02x%02x)\n",
etd->hw_version, param[0], param[1], param[2]);
@@ -871,7 +1038,10 @@
goto init_fail;
}
- elantech_set_input_params(psmouse);
+ if (elantech_set_input_params(psmouse)) {
+ pr_err("failed to query touchpad range.\n");
+ goto init_fail;
+ }
error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
&elantech_attr_group);
@@ -883,7 +1053,7 @@
psmouse->protocol_handler = elantech_process_byte;
psmouse->disconnect = elantech_disconnect;
psmouse->reconnect = elantech_reconnect;
- psmouse->pktsize = etd->hw_version == 2 ? 6 : 4;
+ psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
return 0;
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index d9e6144..236c33c 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -16,6 +16,7 @@
/*
* Command values for Synaptics style queries
*/
+#define ETP_FW_ID_QUERY 0x00
#define ETP_FW_VERSION_QUERY 0x01
#define ETP_CAPABILITIES_QUERY 0x02
@@ -24,6 +25,7 @@
*/
#define ETP_REGISTER_READ 0x10
#define ETP_REGISTER_WRITE 0x11
+#define ETP_REGISTER_READWRITE 0x00
/*
* Hardware version 2 custom PS/2 command value
@@ -79,6 +81,14 @@
#define ETP_WMIN_V2 0
#define ETP_WMAX_V2 15
+/*
+ * v3 hardware has 2 kinds of packet types.
+ */
+#define PACKET_UNKNOWN 0x01
+#define PACKET_DEBOUNCE 0x02
+#define PACKET_V3_HEAD 0x03
+#define PACKET_V3_TAIL 0x04
+
struct elantech_data {
unsigned char reg_10;
unsigned char reg_11;
@@ -98,6 +108,8 @@
unsigned int fw_version;
unsigned int single_finger_reports;
unsigned int y_max;
+ unsigned int prev_x;
+ unsigned int prev_y;
unsigned char parity[256];
};