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Input: elantech - add v4 hardware support

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v4 hardware is a true multitouch capable touchpad (up to 5 fingers).
The packet format is quite complex, please see protocol document for
reference.

Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
JJ Ding
2011-09-09 10:31:58 -07:00
committed by Dmitry Torokhov
parent 28f4961611
commit 1dc6edec12
3 changed files with 432 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

249
drivers/input/mouse/elantech.c
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@@ -84,7 +84,7 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
unsigned char param[3];
int rc = 0;
if (reg < 0x10 || reg > 0x26)
if (reg < 0x07 || reg > 0x26)
return -1;
if (reg > 0x11 && reg < 0x20)
@@ -109,7 +109,7 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
}
break;
case 3:
case 3 ... 4:
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) ||
@@ -122,8 +122,10 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
if (rc)
pr_err("failed to read register 0x%02x.\n", reg);
else
else if (etd->hw_version != 4)
*val = param[0];
else
*val = param[1];
return rc;
}
@@ -137,7 +139,7 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
struct elantech_data *etd = psmouse->private;
int rc = 0;
if (reg < 0x10 || reg > 0x26)
if (reg < 0x07 || reg > 0x26)
return -1;
if (reg > 0x11 && reg < 0x20)
@@ -176,6 +178,20 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
rc = -1;
}
break;
case 4:
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, ETP_REGISTER_READWRITE) ||
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)
@@ -409,12 +425,12 @@ static void elantech_report_absolute_v3(struct psmouse *psmouse,
* 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];
etd->mt[0].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 -
etd->mt[0].y = etd->y_max -
(((packet[4] & 0x0f) << 8) | packet[5]);
/*
* wait for next packet
@@ -423,8 +439,8 @@ static void elantech_report_absolute_v3(struct psmouse *psmouse,
}
/* packet_type == PACKET_V3_TAIL */
x1 = etd->prev_x;
y1 = etd->prev_y;
x1 = etd->mt[0].x;
y1 = etd->mt[0].y;
x2 = ((packet[1] & 0x0f) << 8) | packet[2];
y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
break;
@@ -450,6 +466,129 @@ static void elantech_report_absolute_v3(struct psmouse *psmouse,
input_sync(dev);
}
static void elantech_input_sync_v4(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
unsigned char *packet = psmouse->packet;
input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
input_mt_report_pointer_emulation(dev, true);
input_sync(dev);
}
static void process_packet_status_v4(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
unsigned char *packet = psmouse->packet;
unsigned fingers;
int i;
/* notify finger state change */
fingers = packet[1] & 0x1f;
for (i = 0; i < ETP_MAX_FINGERS; i++) {
if ((fingers & (1 << i)) == 0) {
input_mt_slot(dev, i);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
}
}
elantech_input_sync_v4(psmouse);
}
static void process_packet_head_v4(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
unsigned char *packet = psmouse->packet;
int id = ((packet[3] & 0xe0) >> 5) - 1;
int pres, traces;
if (id < 0)
return;
etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2];
etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
traces = (packet[0] & 0xf0) >> 4;
input_mt_slot(dev, id);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
input_report_abs(dev, ABS_MT_PRESSURE, pres);
input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
/* report this for backwards compatibility */
input_report_abs(dev, ABS_TOOL_WIDTH, traces);
elantech_input_sync_v4(psmouse);
}
static void process_packet_motion_v4(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
unsigned char *packet = psmouse->packet;
int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0;
int id, sid;
id = ((packet[0] & 0xe0) >> 5) - 1;
if (id < 0)
return;
sid = ((packet[3] & 0xe0) >> 5) - 1;
weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1;
/*
* Motion packets give us the delta of x, y values of specific fingers,
* but in two's complement. Let the compiler do the conversion for us.
* Also _enlarge_ the numbers to int, in case of overflow.
*/
delta_x1 = (signed char)packet[1];
delta_y1 = (signed char)packet[2];
delta_x2 = (signed char)packet[4];
delta_y2 = (signed char)packet[5];
etd->mt[id].x += delta_x1 * weight;
etd->mt[id].y -= delta_y1 * weight;
input_mt_slot(dev, id);
input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
if (sid >= 0) {
etd->mt[sid].x += delta_x2 * weight;
etd->mt[sid].y -= delta_y2 * weight;
input_mt_slot(dev, sid);
input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x);
input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y);
}
elantech_input_sync_v4(psmouse);
}
static void elantech_report_absolute_v4(struct psmouse *psmouse,
int packet_type)
{
switch (packet_type) {
case PACKET_V4_STATUS:
process_packet_status_v4(psmouse);
break;
case PACKET_V4_HEAD:
process_packet_head_v4(psmouse);
break;
case PACKET_V4_MOTION:
process_packet_motion_v4(psmouse);
break;
case PACKET_UNKNOWN:
default:
/* impossible to get here */
break;
}
}
static int elantech_packet_check_v1(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
@@ -504,7 +643,7 @@ static int elantech_packet_check_v2(struct psmouse *psmouse)
/*
* We check the constant bits to determine what packet type we get,
* so packet checking is mandatory for v3 hardware.
* so packet checking is mandatory for v3 and later hardware.
*/
static int elantech_packet_check_v3(struct psmouse *psmouse)
{
@@ -527,6 +666,25 @@ static int elantech_packet_check_v3(struct psmouse *psmouse)
return PACKET_UNKNOWN;
}
static int elantech_packet_check_v4(struct psmouse *psmouse)
{
unsigned char *packet = psmouse->packet;
if ((packet[0] & 0x0c) == 0x04 &&
(packet[3] & 0x1f) == 0x11)
return PACKET_V4_HEAD;
if ((packet[0] & 0x0c) == 0x04 &&
(packet[3] & 0x1f) == 0x12)
return PACKET_V4_MOTION;
if ((packet[0] & 0x0c) == 0x04 &&
(packet[3] & 0x1f) == 0x10)
return PACKET_V4_STATUS;
return PACKET_UNKNOWN;
}
/*
* Process byte stream from mouse and handle complete packets
*/
@@ -567,6 +725,14 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
elantech_report_absolute_v3(psmouse, packet_type);
break;
case 4:
packet_type = elantech_packet_check_v4(psmouse);
if (packet_type == PACKET_UNKNOWN)
return PSMOUSE_BAD_DATA;
elantech_report_absolute_v4(psmouse, packet_type);
break;
}
return PSMOUSE_FULL_PACKET;
@@ -610,6 +776,13 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
rc = -1;
break;
case 4:
etd->reg_07 = 0x01;
if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
rc = -1;
goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
}
if (rc == 0) {
@@ -637,6 +810,7 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
}
}
skip_readback_reg_10:
if (rc)
pr_err("failed to initialise registers.\n");
@@ -645,10 +819,12 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
static int elantech_set_range(struct psmouse *psmouse,
unsigned int *x_min, unsigned int *y_min,
unsigned int *x_max, unsigned int *y_max)
unsigned int *x_max, unsigned int *y_max,
unsigned int *width)
{
struct elantech_data *etd = psmouse->private;
unsigned char param[3];
unsigned char traces;
int i;
switch (etd->hw_version) {
@@ -684,6 +860,19 @@ static int elantech_set_range(struct psmouse *psmouse,
*x_max = (0x0f & param[0]) << 8 | param[1];
*y_max = (0xf0 & param[0]) << 4 | param[2];
break;
case 4:
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];
traces = etd->capabilities[1];
if ((traces < 2) || (traces > *x_max))
return -1;
*width = *x_max / (traces - 1);
break;
}
return 0;
@@ -696,9 +885,9 @@ 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;
unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
if (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, &width))
return -1;
__set_bit(EV_KEY, dev->evbit);
@@ -742,9 +931,37 @@ static int elantech_set_input_params(struct psmouse *psmouse)
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);
break;
case 4:
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
/* For X to recognize me as touchpad. */
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);
/*
* range of pressure and width is the same as v2,
* report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
*/
input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
ETP_WMAX_V2, 0, 0);
/* Multitouch capable pad, up to 5 fingers. */
input_mt_init_slots(dev, ETP_MAX_FINGERS);
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);
input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
/*
* The firmware reports how many trace lines the finger spans,
* convert to surface unit as Protocol-B requires.
*/
input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
ETP_WMAX_V2 * width, 0, 0);
break;
}
etd->y_max = y_max;
etd->width = width;
return 0;
}
@@ -816,6 +1033,7 @@ static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
elantech_show_int_attr, \
elantech_set_int_attr)
ELANTECH_INT_ATTR(reg_07, 0x07);
ELANTECH_INT_ATTR(reg_10, 0x10);
ELANTECH_INT_ATTR(reg_11, 0x11);
ELANTECH_INT_ATTR(reg_20, 0x20);
@@ -829,6 +1047,7 @@ ELANTECH_INT_ATTR(debug, 0);
ELANTECH_INT_ATTR(paritycheck, 0);
static struct attribute *elantech_attrs[] = {
&psmouse_attr_reg_07.dattr.attr,
&psmouse_attr_reg_10.dattr.attr,
&psmouse_attr_reg_11.dattr.attr,
&psmouse_attr_reg_20.dattr.attr,
@@ -957,12 +1176,16 @@ static int elantech_reconnect(struct psmouse *psmouse)
*/
static int elantech_set_properties(struct elantech_data *etd)
{
int ver = (etd->fw_version & 0x0f0000) >> 16;
if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
etd->hw_version = 1;
else if (etd->fw_version < 0x150600)
etd->hw_version = 2;
else if ((etd->fw_version & 0x0f0000) >> 16 == 5)
else if (ver == 5)
etd->hw_version = 3;
else if (ver == 6)
etd->hw_version = 4;
else
return -1;