This patch introduces a driver for the PixArt PS/2 touchpad, which
supports both clickpad and touchpad types.
Co-developed-by: Jon Xie <jon_xie@xxxxxxxxxx>
Signed-off-by: Jon Xie <jon_xie@xxxxxxxxxx>
Co-developed-by: Jay Lee <jay_lee@xxxxxxxxxx>
Signed-off-by: Jay Lee <jay_lee@xxxxxxxxxx>
Signed-off-by: Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
---
drivers/input/mouse/Kconfig | 12 ++
drivers/input/mouse/Makefile | 1 +
drivers/input/mouse/pixart_ps2.c | 294 +++++++++++++++++++++++++++++
drivers/input/mouse/pixart_ps2.h | 31 +++
drivers/input/mouse/psmouse-base.c | 17 ++
drivers/input/mouse/psmouse.h | 1 +
6 files changed, 356 insertions(+)
create mode 100644 drivers/input/mouse/pixart_ps2.c
create mode 100644 drivers/input/mouse/pixart_ps2.h
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 833b643f0616..8a27a20d04b0 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -69,6 +69,18 @@ config MOUSE_PS2_LOGIPS2PP
If unsure, say Y.
+config MOUSE_PS2_PIXART
+ bool "PixArt PS/2 touchpad protocol extension" if EXPERT
+ default y
+ depends on MOUSE_PS2
+ help
+ This driver supports the PixArt PS/2 touchpad found in some
+ laptops.
+ Say Y here if you have a PixArt PS/2 TouchPad connected to
+ your system.
+
+ If unsure, say Y.
+
config MOUSE_PS2_SYNAPTICS
bool "Synaptics PS/2 mouse protocol extension" if EXPERT
default y
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
index a1336d5bee6f..563029551529 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -32,6 +32,7 @@ psmouse-$(CONFIG_MOUSE_PS2_ELANTECH) += elantech.o
psmouse-$(CONFIG_MOUSE_PS2_OLPC) += hgpk.o
psmouse-$(CONFIG_MOUSE_PS2_LOGIPS2PP) += logips2pp.o
psmouse-$(CONFIG_MOUSE_PS2_LIFEBOOK) += lifebook.o
+psmouse-$(CONFIG_MOUSE_PS2_PIXART) += pixart_ps2.o
psmouse-$(CONFIG_MOUSE_PS2_SENTELIC) += sentelic.o
psmouse-$(CONFIG_MOUSE_PS2_TRACKPOINT) += trackpoint.o
psmouse-$(CONFIG_MOUSE_PS2_TOUCHKIT) += touchkit_ps2.o
diff --git a/drivers/input/mouse/pixart_ps2.c b/drivers/input/mouse/pixart_ps2.c
new file mode 100644
index 000000000000..532d84ab7654
--- /dev/null
+++ b/drivers/input/mouse/pixart_ps2.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pixart Touchpad Controller 1336U PS2 driver
+ *
+ * Author: Jon Xie <jon_xie@xxxxxxxxxx>
+ * Jay Lee <jay_lee@xxxxxxxxxx>
+ * Further cleanup and restructuring by:
+ * Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
+ *
+ * Copyright (C) 2021-2024 Pixart Imaging
+ * Copyright (C) 2024 Loongson Technology Corporation Limited.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/libps2.h>
+#include <linux/input/mt.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include "pixart_ps2.h"
+
+static int pixart_mode_detect(struct psmouse *psmouse)
+{
+ u8 param[1];
+
+ if (ps2_command(&psmouse->ps2dev, param, PIXART_CMD_REPORT_FORMAT))
+ return -EIO;
+
+ return (param[0] == 1) ? PIXART_MODE_ABS : PIXART_MODE_REL;
+}
+
+static int pixart_type_detect(struct psmouse *psmouse)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[3];
+
+ param[0] = 0x0a;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 0x0;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ param[0] = 0x0;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ param[0] = 0x0;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ param[0] = 0x03;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+
+ return (param[0] == 0x0e) ? PIXART_TYPE_TOUCHPAD : PIXART_TYPE_CLICKPAD;
+}
+
+static int pixart_intellimouse_detect(struct psmouse *psmouse)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[2];
+
+ param[0] = 200;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 100;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 80;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+
+ return (param[0] == 3) ? 0 : -1;
+}
+
+static void pixart_reset(struct psmouse *psmouse)
+{
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+ msleep(100);
+ psmouse_reset(psmouse);
+}
+
+static psmouse_ret_t pixart_process_abs_packet(struct psmouse *psmouse)
+{
+ struct pixart_data *priv = psmouse->private;
+ struct input_dev *dev = psmouse->dev;
+ u8 *packet = psmouse->packet;
+ u8 contact_cnt = (packet[0] >> 4) & 0x07;
+ unsigned int abs_x, abs_y;
+ int i, id, fingers = 0;
+ bool tip;
+
+ if (contact_cnt > MAX_FINGERS || ((packet[0] & 0x8c) != 0x80))
+ return PSMOUSE_BAD_DATA;
+
+ if (contact_cnt == MAX_FINGERS && psmouse->pktcnt < psmouse->pktsize)
+ return PSMOUSE_GOOD_DATA;
+ else if (contact_cnt == 0 && psmouse->pktcnt < 5)
+ return PSMOUSE_GOOD_DATA;
+ else if (psmouse->pktcnt < (3 * contact_cnt + 2))
+ return PSMOUSE_GOOD_DATA;
+
+ for (i = 0; i < contact_cnt; i++) {
+ id = packet[3 * i + 3] & 0x07;
+ abs_y = ((packet[3 * i + 3] & 0x30) << 4) | packet[3 * i + 1];
+ abs_x = ((packet[3 * i + 3] & 0xc0) << 2) | packet[3 * i + 2];
+
+ if (i == MAX_FINGERS - 1)
+ tip = packet[14] & (0x01 << 1);
+ else
+ tip = packet[3 * contact_cnt + 1] & (0x01 << (2 * i + 1));
+
+ input_mt_slot(dev, id);
+ input_mt_report_slot_state(dev, MT_TOOL_FINGER, tip);
+ if (tip) {
+ fingers++;
+ input_report_abs(dev, ABS_MT_POSITION_Y, abs_y);
+ input_report_abs(dev, ABS_MT_POSITION_X, abs_x);
+ }
+ }
+
+ input_mt_drop_unused(dev);
+ input_mt_report_pointer_emulation(dev, false);
+ input_mt_report_finger_count(dev, fingers);
+
+ if (priv->type == PIXART_TYPE_CLICKPAD) {
+ input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
+ } else {
+ 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);
+
+ return PSMOUSE_FULL_PACKET;
+}
+
+static psmouse_ret_t pixart_process_rel_packet(struct psmouse *psmouse)
+{
+ struct input_dev *dev = psmouse->dev;
+ u8 *packet = psmouse->packet;
+ int x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
+ int y = packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0;
+ int w = -(s8)packet[3];
+
+ if (psmouse->pktcnt < psmouse->pktsize)
+ return PSMOUSE_GOOD_DATA;
+
+ psmouse_report_standard_buttons(dev, packet[0]);
+ input_report_rel(dev, REL_X, x);
+ input_report_rel(dev, REL_Y, y);
+ input_report_rel(dev, REL_WHEEL, w);
+ input_sync(dev);
+
+ return PSMOUSE_FULL_PACKET;
+}
+
+static void pixart_disconnect(struct psmouse *psmouse)
+{
+ psmouse_info(psmouse, "Device disconnect");
+ pixart_reset(psmouse);
+ kfree(psmouse->private);
+ psmouse->private = NULL;
+}
+
+static int pixart_reconnect(struct psmouse *psmouse)
+{
+ struct pixart_data *priv = psmouse->private;
+
+ psmouse_info(psmouse, "Device reconnect");
+ pixart_reset(psmouse);
+
+ priv->mode = pixart_mode_detect(psmouse);
+ if (priv->mode < 0) {
+ psmouse_err(psmouse, "Unable to detect the PixArt device");
+ return -EIO;
+ }
+
+ if (priv->mode == PIXART_MODE_ABS)
+ ps2_command(&psmouse->ps2dev, NULL, PIXART_CMD_SWITCH_PROTO);
+
+ return 0;
+}
+
+static void pixart_set_abs_input_params(struct input_dev *dev, struct pixart_data *priv)
+{
+ __clear_bit(EV_REL, dev->evbit);
+ __clear_bit(REL_X, dev->relbit);
+ __clear_bit(REL_Y, dev->relbit);
+ __clear_bit(BTN_MIDDLE, dev->keybit);
+
+ __set_bit(EV_KEY, dev->evbit);
+ __set_bit(BTN_LEFT, dev->keybit);
+ __set_bit(BTN_RIGHT, dev->keybit);
+ if (priv->type == PIXART_TYPE_CLICKPAD) {
+ __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
+ __clear_bit(BTN_RIGHT, dev->keybit);
+ }
+ __set_bit(BTN_TOUCH, dev->keybit);
+ __set_bit(BTN_TOOL_FINGER, dev->keybit);
+ __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
+ __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
+ __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
+ __set_bit(INPUT_PROP_POINTER, dev->propbit);
+
+ __set_bit(EV_ABS, dev->evbit);
+ input_set_abs_params(dev, ABS_X, 0, ABS_MAX_X, 0, 0);
+ input_set_abs_params(dev, ABS_Y, 0, ABS_MAX_Y, 0, 0);
+
+ input_set_abs_params(dev, ABS_MT_POSITION_X, 0, ABS_MAX_X, 0, 0);
+ input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, ABS_MAX_Y, 0, 0);
+
+ input_mt_init_slots(dev, SLOTS_NUMBER, 0);
+}
+
+static void pixart_set_rel_input_params(struct input_dev *dev, struct pixart_data *priv)
+{
+ __set_bit(EV_KEY, dev->evbit);
+ __set_bit(EV_REL, dev->evbit);
+ __set_bit(BTN_LEFT, dev->keybit);
+ __set_bit(BTN_RIGHT, dev->keybit);
+ __set_bit(REL_X, dev->relbit);
+ __set_bit(REL_Y, dev->relbit);
+ __set_bit(REL_WHEEL, dev->relbit);
+ __set_bit(INPUT_PROP_POINTER, dev->propbit);
+}
+
+int pixart_detect(struct psmouse *psmouse, bool set_properties)
+{
+ int mode, type;
+
+ pixart_reset(psmouse);
+
+ type = pixart_type_detect(psmouse);
+ if (type < 0)
+ return -ENODEV;
+
+ mode = pixart_mode_detect(psmouse);
+ if (mode < 0)
+ return -ENODEV;
+
+ psmouse_info(psmouse, "Detect PixArt Device.");
+ if (set_properties) {
+ psmouse->vendor = "PixArt";
+ psmouse->name = (type == PIXART_TYPE_TOUCHPAD) ?
+ "touchpad" : "clickpad";
+ }
+
+ return 0;
+}
+
+int pixart_init(struct psmouse *psmouse)
+{
+ struct pixart_data *priv;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ psmouse->private = priv;
+ pixart_reset(psmouse);
+
+ priv->type = pixart_type_detect(psmouse);
+ if (priv->type < 0)
+ goto fail;
+
+ priv->mode = pixart_mode_detect(psmouse);
+ if (priv->mode < 0) {
+ psmouse_err(psmouse, "Unable to initialize the PixArt device\n");
+ goto fail;
+ }
+
+ if (priv->mode == PIXART_MODE_ABS) {
+ ps2_command(&psmouse->ps2dev, NULL, PIXART_CMD_SWITCH_PROTO);
+ pixart_set_abs_input_params(psmouse->dev, priv);
+ psmouse->protocol_handler = pixart_process_abs_packet;
+ psmouse->pktsize = 15;
+ } else {
+ pixart_reset(psmouse);
+ pixart_intellimouse_detect(psmouse);
+ pixart_set_rel_input_params(psmouse->dev, priv);
+ psmouse->protocol_handler = pixart_process_rel_packet;
+ psmouse->pktsize = 4;
+ }
+
+ psmouse->disconnect = pixart_disconnect;
+ psmouse->reconnect = pixart_reconnect;
+ psmouse->cleanup = pixart_reset;
+ /* resync is not supported yet */
+ psmouse->resync_time = 0;
+
+ psmouse_info(psmouse, "Set device as Type: %x, mode: %x", priv->type, priv->mode);
+ return 0;
+
+fail:
+ pixart_reset(psmouse);
+ kfree(priv);
+ psmouse->private = NULL;
+ return -1;
+}
diff --git a/drivers/input/mouse/pixart_ps2.h b/drivers/input/mouse/pixart_ps2.h
new file mode 100644
index 000000000000..224ab3a4f739
--- /dev/null
+++ b/drivers/input/mouse/pixart_ps2.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _PIXART_PS2_H
+#define _PIXART_PS2_H
+
+#include "psmouse.h"
+
+#define ABS_MAX_X 1023
+#define ABS_MAX_Y 579
+#define MAX_FINGERS 4
+#define SLOTS_NUMBER MAX_FINGERS
+
+#define PIXART_CMD_REPORT_FORMAT 0x01d8
+#define PIXART_CMD_SWITCH_PROTO 0x00de
+
+#define PIXART_MODE_REL 0
+#define PIXART_MODE_ABS 1
+
+#define PIXART_TYPE_CLICKPAD 0
+#define PIXART_TYPE_TOUCHPAD 1
+
+struct pixart_data {
+ int mode;
+ int type;
+ int x_max;
+ int y_max;
+};
+
+int pixart_detect(struct psmouse *psmouse, bool set_properties);
+int pixart_init(struct psmouse *psmouse);
+
+#endif /* _PIXART_PS2_H */
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index a0aac76b1e41..41af3460077d 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -36,6 +36,7 @@
#include "focaltech.h"
#include "vmmouse.h"
#include "byd.h"
+#include "pixart_ps2.h"
#define DRIVER_DESC "PS/2 mouse driver"
@@ -905,6 +906,15 @@ static const struct psmouse_protocol psmouse_protocols[] = {
.detect = byd_detect,
.init = byd_init,
},
+#endif
+#ifdef CONFIG_MOUSE_PS2_PIXART
+ {
+ .type = PSMOUSE_PIXART,
+ .name = "PixArtPS/2",
+ .alias = "pixart",
+ .detect = pixart_detect,
+ .init = pixart_init,
+ },
#endif
{
.type = PSMOUSE_AUTO,
@@ -1172,6 +1182,13 @@ static int psmouse_extensions(struct psmouse *psmouse,
return ret;
}
+ /* Try PixArt touchpad */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_PIXART, &max_proto,
+ set_properties, true)) {
+ return PSMOUSE_PIXART;
+ }
+
if (max_proto > PSMOUSE_IMEX) {
if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
&max_proto, set_properties, true))
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
index b05c6fbae7e3..23f7fa7243cb 100644
--- a/drivers/input/mouse/psmouse.h
+++ b/drivers/input/mouse/psmouse.h
@@ -69,6 +69,7 @@ enum psmouse_type {
PSMOUSE_BYD,
PSMOUSE_SYNAPTICS_SMBUS,
PSMOUSE_ELANTECH_SMBUS,
+ PSMOUSE_PIXART,
PSMOUSE_AUTO /* This one should always be last */
};
--
2.43.0
