[PATCH] byd changes

From: pospeselr
Date: Wed Feb 10 2016 - 21:24:00 EST

---
drivers/input/mouse/byd.c | 577 ++++++++++++++++++++++++-------------
drivers/input/mouse/psmouse-base.c | 2 +-
2 files changed, 378 insertions(+), 201 deletions(-)

diff --git a/drivers/input/mouse/byd.c b/drivers/input/mouse/byd.c
index 9425e0f..4c388ed 100644
--- a/drivers/input/mouse/byd.c
+++ b/drivers/input/mouse/byd.c
@@ -2,20 +2,32 @@
* BYD TouchPad PS/2 mouse driver
*
* Copyright (C) 2015 Chris Diamand <chris@xxxxxxxxxxx>
+ * Copyright (C) 2015 Richard Pospesel <pospeselr@xxxxxxxxx>
+ * Copyright (C) 2015 Tai Chi Minh Ralph Eastwood
+ * Copyright (C) 2015 Martin Wimpress
+ * Copyright (C) 2015 Jay Kuri
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
+ *
+ * Protocol of BYD Touch Pad reverse-engineered from windows driver:
+ * filename: "byd touchpad driver - win7, 8, 8.1 - 2.4.1.102.zip"
+ * md5: 0d5e4660b98fca9587a0df212fca3048
+ * sha1: 97a0eca8edc482bf9d08ab9509084a514dad4c4b
+ * datasheet: http://bydit.com/userfiles/file/BTP10463-XXX.pdf
*/

#include <linux/delay.h>
#include <linux/input.h>
#include <linux/libps2.h>
#include <linux/serio.h>
+#include <linux/slab.h>

#include "psmouse.h"
#include "byd.h"

+/* PS2 Bits */
#define PS2_Y_OVERFLOW BIT_MASK(7)
#define PS2_X_OVERFLOW BIT_MASK(6)
#define PS2_Y_SIGN BIT_MASK(5)
@@ -26,69 +38,246 @@
#define PS2_LEFT BIT_MASK(0)

/*
- * The touchpad reports gestures in the last byte of each packet. It can take
- * any of the following values:
+ * BYD pad constants
*/

-/* One-finger scrolling in one of the edge scroll zones. */
-#define BYD_SCROLLUP 0xCA
-#define BYD_SCROLLDOWN 0x36
-#define BYD_SCROLLLEFT 0xCB
-#define BYD_SCROLLRIGHT 0x35
-/* Two-finger scrolling. */
-#define BYD_2DOWN 0x2B
-#define BYD_2UP 0xD5
-#define BYD_2LEFT 0xD6
-#define BYD_2RIGHT 0x2A
-/* Pinching in or out. */
-#define BYD_ZOOMOUT 0xD8
-#define BYD_ZOOMIN 0x28
-/* Three-finger swipe. */
-#define BYD_3UP 0xD3
-#define BYD_3DOWN 0x2D
-#define BYD_3LEFT 0xD4
-#define BYD_3RIGHT 0x2C
-/* Four-finger swipe. */
-#define BYD_4UP 0xCD
-#define BYD_4DOWN 0x33
+/*
+ * True device resolution is unknown, however experiments show the
+ * resolution is about 111 units/mm.
+ * Absolute coordinate packets are in the range 0-255 for both X and Y
+ * we pick ABS_X/ABS_Y dimensions which are multiples of 256 and in
+ * the right ballpark given the touchpad's physical dimensions and estimate
+ * resolution per spec sheet, device active area dimensions are
+ * 101.6 x 60.1 mm.
+ */
+#define BYD_PAD_WIDTH 11264
+#define BYD_PAD_HEIGHT 6656
+#define BYD_PAD_RESOLUTION 111

-int byd_detect(struct psmouse *psmouse, bool set_properties)
-{
- struct ps2dev *ps2dev = &psmouse->ps2dev;
- unsigned char param[4];
+/*
+ * Given the above dimensions, relative packets velocity is in multiples of
+ * 1 unit / 11 milliseconds. We use this dt to estimate distance traveled
+ */
+#define BYD_DT 11
+/* Time in milliseconds used to timeout various touch events */
+#define BYD_TOUCH_TIMEOUT 64

- param[0] = 0x03;
- param[1] = 0x00;
- param[2] = 0x00;
- param[3] = 0x00;
+/* BYD commands reverse engineered from windows driver */

- if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
- return -1;
- if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
- return -1;
- if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
- return -1;
- if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
- return -1;
- if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
- return -1;
-
- if (param[1] != 0x03 || param[2] != 0x64)
- return -ENODEV;
+/*
+ * Swipe gesture from off-pad to on-pad
+ * 0 : disable
+ * 1 : enable
+ */
+#define BYD_CMD_SET_OFFSCREEN_SWIPE 0x10cc
+/*
+ * Tap and drag delay time
+ * 0 : disable
+ * 1 - 8 : least to most delay
+ */
+#define BYD_CMD_SET_TAP_DRAG_DELAY_TIME 0x10cf
+/*
+ * Physical buttons function mapping
+ * 0 : enable
+ * 4 : normal
+ * 5 : left button custom command
+ * 6 : right button custom command
+ * 8 : disable
+ */
+#define BYD_CMD_SET_PHYSICAL_BUTTONS 0x10d0
+/*
+ * Absolute mode (1 byte X/Y resolution)
+ * 0 : disable
+ * 2 : enable
+ */
+#define BYD_CMD_SET_ABSOLUTE_MODE 0x10d1
+/*
+ * Two finger scrolling
+ * 1 : vertical
+ * 2 : horizontal
+ * 3 : vertical + horizontal
+ * 4 : disable
+ */
+#define BYD_CMD_SET_TWO_FINGER_SCROLL 0x10d2
+/*
+ * Handedness
+ * 1 : right handed
+ * 2 : left handed
+ */
+#define BYD_CMD_SET_HANDEDNESS 0x10d3
+/*
+ * Tap to click
+ * 1 : enable
+ * 2 : disable
+ */
+#define BYD_CMD_SET_TAP 0x10d4
+/*
+ * Tap and drag
+ * 1 : tap and hold to drag
+ * 2 : tap and hold to drag + lock
+ * 3 : disable
+ */
+#define BYD_CMD_SET_TAP_DRAG 0x10d5
+/*
+ * Touch sensitivity
+ * 1 - 7 : least to most sensitive
+ */
+#define BYD_CMD_SET_TOUCH_SENSITIVITY 0x10d6
+/*
+ * One finger scrolling
+ * 1 : vertical
+ * 2 : horizontal
+ * 3 : vertical + horizontal
+ * 4 : disable
+ */
+#define BYD_CMD_SET_ONE_FINGER_SCROLL 0x10d7
+/*
+ * One finger scrolling function
+ * 1 : free scrolling
+ * 2 : edge motion
+ * 3 : free scrolling + edge motion
+ * 4 : disable
+ */
+#define BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC 0x10d8
+/*
+ * Sliding speed
+ * 1 - 5 : slowest to fastest
+ */
+#define BYD_CMD_SET_SLIDING_SPEED 0x10da
+/*
+ * Edge motion
+ * 1 : disable
+ * 2 : enable when dragging
+ * 3 : enable when dragging and pointing
+ */
+#define BYD_CMD_SET_EDGE_MOTION 0x10db
+/*
+ * Left edge region size
+ * 0 - 7 : smallest to largest width
+ */
+#define BYD_CMD_SET_LEFT_EDGE_REGION 0x10dc
+/*
+ * Top edge region size
+ * 0 - 9 : smallest to largest height
+ */
+#define BYD_CMD_SET_TOP_EDGE_REGION 0x10dd
+/*
+ * Disregard palm press as clicks
+ * 1 - 6 : smallest to largest
+ */
+#define BYD_CMD_SET_PALM_CHECK 0x10de
+/*
+ * Right edge region size
+ * 0 - 7 : smallest to largest width
+ */
+#define BYD_CMD_SET_RIGHT_EDGE_REGION 0x10df
+/*
+ * Bottom edge region size
+ * 0 - 9 : smallest to largest height
+ */
+#define BYD_CMD_SET_BOTTOM_EDGE_REGION 0x10e1
+/*
+ * Multitouch gestures
+ * 1 : enable
+ * 2 : disable
+ */
+#define BYD_CMD_SET_MULTITOUCH 0x10e3
+/*
+ * Edge motion speed
+ * 0 : control with finger pressure
+ * 1 - 9 : slowest to fastest
+ */
+#define BYD_CMD_SET_EDGE_MOTION_SPEED 0x10e4
+/*
+ * Two finger scolling function
+ * 0 : free scrolling
+ * 1 : free scrolling (with momentum)
+ * 2 : edge motion
+ * 3 : free scrolling (with momentum) + edge motion
+ * 4 : disable
+ */
+#define BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC 0x10e5

- psmouse_dbg(psmouse, "BYD touchpad detected\n");
+/*
+ * The touchpad generates a mixture of absolute and relative packets, indicated
+ * by the the last byte of each packet being set to one of the following:
+ */
+#define BYD_PACKET_ABSOLUTE 0xf8
+#define BYD_PACKET_RELATIVE 0x00
+/* Multitouch gesture packets */
+#define BYD_PACKET_PINCH_IN 0xd8
+#define BYD_PACKET_PINCH_OUT 0x28
+#define BYD_PACKET_ROTATE_CLOCKWISE 0x29
+#define BYD_PACKET_ROTATE_ANTICLOCKWISE 0xd7
+#define BYD_PACKET_TWO_FINGER_SCROLL_RIGHT 0x2a
+#define BYD_PACKET_TWO_FINGER_SCROLL_DOWN 0x2b
+#define BYD_PACKET_TWO_FINGER_SCROLL_UP 0xd5
+#define BYD_PACKET_TWO_FINGER_SCROLL_LEFT 0xd6
+#define BYD_PACKET_THREE_FINGER_SWIPE_RIGHT 0x2c
+#define BYD_PACKET_THREE_FINGER_SWIPE_DOWN 0x2d
+#define BYD_PACKET_THREE_FINGER_SWIPE_UP 0xd3
+#define BYD_PACKET_THREE_FINGER_SWIPE_LEFT 0xd4
+#define BYD_PACKET_FOUR_FINGER_DOWN 0x33
+#define BYD_PACKET_FOUR_FINGER_UP 0xcd
+#define BYD_PACKET_REGION_SCROLL_RIGHT 0x35
+#define BYD_PACKET_REGION_SCROLL_DOWN 0x36
+#define BYD_PACKET_REGION_SCROLL_UP 0xca
+#define BYD_PACKET_REGION_SCROLL_LEFT 0xcb
+#define BYD_PACKET_RIGHT_CORNER_CLICK 0xd2
+#define BYD_PACKET_LEFT_CORNER_CLICK 0x2e
+#define BYD_PACKET_LEFT_AND_RIGHT_CORNER_CLICK 0x2f
+#define BYD_PACKET_ONTO_PAD_SWIPE_RIGHT 0x37
+#define BYD_PACKET_ONTO_PAD_SWIPE_DOWN 0x30
+#define BYD_PACKET_ONTO_PAD_SWIPE_UP 0xd0
+#define BYD_PACKET_ONTO_PAD_SWIPE_LEFT 0xc9
+
+struct byd_data {
+ struct timer_list timer;
+ s32 abs_x;
+ s32 abs_y;
+ u32 last_touch_time;
+ bool btn_left : 1;
+ bool btn_right : 1;
+ bool touch : 1;
+};
+
+static void byd_report_input(struct psmouse *psmouse)
+{
+ struct byd_data *priv = psmouse->private;
+ struct input_dev *dev = psmouse->dev;

- if (set_properties) {
- psmouse->vendor = "BYD";
- psmouse->name = "TouchPad";
- }
+ input_report_abs(dev, ABS_X, priv->abs_x);
+ input_report_abs(dev, ABS_Y, priv->abs_y);
+ input_report_key(dev, BTN_LEFT, priv->btn_left);
+ input_report_key(dev, BTN_RIGHT, priv->btn_right);
+ input_report_key(dev, BTN_TOUCH, priv->touch);
+ input_report_key(dev, BTN_TOOL_FINGER, priv->touch);
+ input_sync(dev);
+}

- return 0;
+static void byd_clear_touch(unsigned long data)
+{
+ struct psmouse *psmouse = (struct psmouse *)data;
+ struct byd_data *priv = psmouse->private;
+
+ serio_pause_rx(psmouse->ps2dev.serio);
+ priv->touch = false;
+ /*
+ * Move cursor back to center of pad when we lose touch - this
+ * specifically improves user experience when moving cursor with one
+ * finger, and pressing a button with another.
+ */
+ priv->abs_x = BYD_PAD_WIDTH / 2;
+ priv->abs_y = BYD_PAD_HEIGHT / 2;
+ byd_report_input(psmouse);
+
+ serio_continue_rx(psmouse->ps2dev.serio);
}

static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
{
- struct input_dev *dev = psmouse->dev;
+ struct byd_data *priv = psmouse->private;
+ u32 now_msecs = jiffies_to_msecs(jiffies);
u8 *pkt = psmouse->packet;

if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) {
@@ -102,53 +291,33 @@ static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)

/* Otherwise, a full packet has been received */
switch (pkt[3]) {
- case 0: {
+ case BYD_PACKET_ABSOLUTE:
+ /* Only use absolute packets for the start of movement. */
+ if (!priv->touch) {
+ priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256);
+ priv->abs_y = (255 - pkt[2]) *
+ (BYD_PAD_HEIGHT / 256);
+
+ /* needed to detect tap */
+ if (now_msecs - priv->last_touch_time > BYD_TOUCH_TIMEOUT)
+ priv->touch = true;
+ }
+ break;
+ case BYD_PACKET_RELATIVE: {
/* Standard packet */
/* Sign-extend if a sign bit is set. */
- unsigned int signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0;
- unsigned int signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0;
- int dx = signx | (int) pkt[1];
- int dy = signy | (int) pkt[2];
+ u32 signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0;
+ u32 signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0;
+ s32 dx = signx | (int) pkt[1];
+ s32 dy = signy | (int) pkt[2];

- input_report_rel(psmouse->dev, REL_X, dx);
- input_report_rel(psmouse->dev, REL_Y, -dy);
+ /* Update position based on velocity */
+ priv->abs_x += dx * BYD_DT;
+ priv->abs_y -= dy * BYD_DT;

- input_report_key(psmouse->dev, BTN_LEFT, pkt[0] & PS2_LEFT);
- input_report_key(psmouse->dev, BTN_RIGHT, pkt[0] & PS2_RIGHT);
- input_report_key(psmouse->dev, BTN_MIDDLE, pkt[0] & PS2_MIDDLE);
+ priv->touch = true;
break;
}
-
- case BYD_SCROLLDOWN:
- case BYD_2DOWN:
- input_report_rel(dev, REL_WHEEL, -1);
- break;
-
- case BYD_SCROLLUP:
- case BYD_2UP:
- input_report_rel(dev, REL_WHEEL, 1);
- break;
-
- case BYD_SCROLLLEFT:
- case BYD_2LEFT:
- input_report_rel(dev, REL_HWHEEL, -1);
- break;
-
- case BYD_SCROLLRIGHT:
- case BYD_2RIGHT:
- input_report_rel(dev, REL_HWHEEL, 1);
- break;
-
- case BYD_ZOOMOUT:
- case BYD_ZOOMIN:
- case BYD_3UP:
- case BYD_3DOWN:
- case BYD_3LEFT:
- case BYD_3RIGHT:
- case BYD_4UP:
- case BYD_4DOWN:
- break;
-
default:
psmouse_warn(psmouse,
"Unrecognized Z: pkt = %02x %02x %02x %02x\n",
@@ -157,134 +326,76 @@ static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
return PSMOUSE_BAD_DATA;
}

- input_sync(dev);
+ priv->btn_left = pkt[0] & PS2_LEFT;
+ priv->btn_right = pkt[0] & PS2_RIGHT;

- return PSMOUSE_FULL_PACKET;
-}
-
-/* Send a sequence of bytes, where each is ACKed before the next is sent. */
-static int byd_send_sequence(struct psmouse *psmouse, const u8 *seq, size_t len)
-{
- unsigned int i;
+ byd_report_input(psmouse);

- for (i = 0; i < len; ++i) {
- if (ps2_command(&psmouse->ps2dev, NULL, seq[i]))
- return -1;
+ /* Reset time since last touch. */
+ if (priv->touch) {
+ priv->last_touch_time = now_msecs;
+ mod_timer(&priv->timer, jiffies + msecs_to_jiffies(BYD_TOUCH_TIMEOUT));
}
- return 0;
-}
-
-/* Keep scrolling after fingers are removed. */
-#define SCROLL_INERTIAL 0x01
-#define SCROLL_NO_INERTIAL 0x02
-
-/* Clicking can be done by tapping or pressing. */
-#define CLICK_BOTH 0x01
-/* Clicking can only be done by pressing. */
-#define CLICK_PRESS_ONLY 0x02
-
-static int byd_enable(struct psmouse *psmouse)
-{
- const u8 seq1[] = { 0xE2, 0x00, 0xE0, 0x02, 0xE0 };
- const u8 seq2[] = {
- 0xD3, 0x01,
- 0xD0, 0x00,
- 0xD0, 0x04,
- /* Whether clicking is done by tapping or pressing. */
- 0xD4, CLICK_PRESS_ONLY,
- 0xD5, 0x01,
- 0xD7, 0x03,
- /* Vertical and horizontal one-finger scroll zone inertia. */
- 0xD8, SCROLL_INERTIAL,
- 0xDA, 0x05,
- 0xDB, 0x02,
- 0xE4, 0x05,
- 0xD6, 0x01,
- 0xDE, 0x04,
- 0xE3, 0x01,
- 0xCF, 0x00,
- 0xD2, 0x03,
- /* Vertical and horizontal two-finger scrolling inertia. */
- 0xE5, SCROLL_INERTIAL,
- 0xD9, 0x02,
- 0xD9, 0x07,
- 0xDC, 0x03,
- 0xDD, 0x03,
- 0xDF, 0x03,
- 0xE1, 0x03,
- 0xD1, 0x00,
- 0xCE, 0x00,
- 0xCC, 0x00,
- 0xE0, 0x00,
- 0xE2, 0x01
- };
- u8 param[4];
-
- if (byd_send_sequence(psmouse, seq1, ARRAY_SIZE(seq1)))
- return -1;

- /* Send a 0x01 command, which should return 4 bytes. */
- if (ps2_command(&psmouse->ps2dev, param, 0x0401))
- return -1;
-
- if (byd_send_sequence(psmouse, seq2, ARRAY_SIZE(seq2)))
- return -1;
-
- return 0;
+ return PSMOUSE_FULL_PACKET;
}

-/*
- * Send the set of PS/2 commands required to make it identify as an
- * intellimouse with 4-byte instead of 3-byte packets.
- */
-static int byd_send_intellimouse_sequence(struct psmouse *psmouse)
+static int byd_reset_touchpad(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[4];
- int i;
+ size_t i;
+
const struct {
u16 command;
u8 arg;
} seq[] = {
- { PSMOUSE_CMD_RESET_BAT, 0 },
- { PSMOUSE_CMD_RESET_BAT, 0 },
- { PSMOUSE_CMD_GETID, 0 },
- { PSMOUSE_CMD_SETSCALE11, 0 },
- { PSMOUSE_CMD_SETSCALE11, 0 },
- { PSMOUSE_CMD_SETSCALE11, 0 },
- { PSMOUSE_CMD_GETINFO, 0 },
- { PSMOUSE_CMD_SETRES, 0x03 },
+ /*
+ * Intellimouse initialization sequence, to get 4-byte instead
+ * of 3-byte packets.
+ */
{ PSMOUSE_CMD_SETRATE, 0xC8 },
{ PSMOUSE_CMD_SETRATE, 0x64 },
{ PSMOUSE_CMD_SETRATE, 0x50 },
{ PSMOUSE_CMD_GETID, 0 },
- { PSMOUSE_CMD_SETRATE, 0xC8 },
- { PSMOUSE_CMD_SETRATE, 0xC8 },
- { PSMOUSE_CMD_SETRATE, 0x50 },
- { PSMOUSE_CMD_GETID, 0 },
- { PSMOUSE_CMD_SETRATE, 0x64 },
- { PSMOUSE_CMD_SETRES, 0x03 },
- { PSMOUSE_CMD_ENABLE, 0 }
+ { PSMOUSE_CMD_ENABLE, 0 },
+ /*
+ * BYD-specific initialization, which enables absolute mode and
+ * (if desired), the touchpad's built-in gesture detection.
+ */
+ { 0x10E2, 0x00 },
+ { 0x10E0, 0x02 },
+ /* The touchpad should reply with 4 seemingly-random bytes */
+ { 0x14E0, 0x01 },
+ /* Pairs of parameters and values. */
+ { BYD_CMD_SET_HANDEDNESS, 0x01 },
+ { BYD_CMD_SET_PHYSICAL_BUTTONS, 0x04 },
+ { BYD_CMD_SET_TAP, 0x02 },
+ { BYD_CMD_SET_ONE_FINGER_SCROLL, 0x04 },
+ { BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC, 0x04 },
+ { BYD_CMD_SET_EDGE_MOTION, 0x01 },
+ { BYD_CMD_SET_PALM_CHECK, 0x00 },
+ { BYD_CMD_SET_MULTITOUCH, 0x02 },
+ { BYD_CMD_SET_TWO_FINGER_SCROLL, 0x04 },
+ { BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC, 0x04 },
+ { BYD_CMD_SET_LEFT_EDGE_REGION, 0x00 },
+ { BYD_CMD_SET_TOP_EDGE_REGION, 0x00 },
+ { BYD_CMD_SET_RIGHT_EDGE_REGION, 0x00 },
+ { BYD_CMD_SET_BOTTOM_EDGE_REGION, 0x00 },
+ { BYD_CMD_SET_ABSOLUTE_MODE, 0x02 },
+ /* Finalize initialization. */
+ { 0x10E0, 0x00 },
+ { 0x10E2, 0x01 },
};

- memset(param, 0, sizeof(param));
for (i = 0; i < ARRAY_SIZE(seq); ++i) {
+ memset(param, 0, sizeof(param));
param[0] = seq[i].arg;
if (ps2_command(ps2dev, param, seq[i].command))
- return -1;
- }
-
- return 0;
-}
-
-static int byd_reset_touchpad(struct psmouse *psmouse)
-{
- if (byd_send_intellimouse_sequence(psmouse))
- return -EIO;
-
- if (byd_enable(psmouse))
- return -EIO;
+ return -EIO;

+ }
+ psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
return 0;
}

@@ -314,9 +425,50 @@ static int byd_reconnect(struct psmouse *psmouse)
return 0;
}

+static void byd_disconnect(struct psmouse *psmouse)
+{
+ struct byd_data *priv = psmouse->private;
+
+ if (priv) {
+ del_timer(&priv->timer);
+ kfree(psmouse->private);
+ psmouse->private = NULL;
+ }
+}
+
+int byd_detect(struct psmouse *psmouse, bool set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[4] = {0x03, 0x00, 0x00, 0x00};
+
+ if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
+ return -1;
+ if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
+ return -1;
+ if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
+ return -1;
+ if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
+ return -1;
+ if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
+ return -1;
+
+ if (param[1] != 0x03 || param[2] != 0x64)
+ return -ENODEV;
+
+ psmouse_dbg(psmouse, "BYD touchpad detected\n");
+
+ if (set_properties) {
+ psmouse->vendor = "BYD";
+ psmouse->name = "TouchPad";
+ }
+
+ return 0;
+}
+
int byd_init(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
+ struct byd_data *priv;

if (psmouse_reset(psmouse))
return -EIO;
@@ -324,14 +476,39 @@ int byd_init(struct psmouse *psmouse)
if (byd_reset_touchpad(psmouse))
return -EIO;

+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ memset(priv, 0, sizeof(*priv));
+ setup_timer(&priv->timer, byd_clear_touch, (unsigned long) psmouse);
+
+ psmouse->private = priv;
+ psmouse->disconnect = byd_disconnect;
psmouse->reconnect = byd_reconnect;
psmouse->protocol_handler = byd_process_byte;
psmouse->pktsize = 4;
psmouse->resync_time = 0;

- __set_bit(BTN_MIDDLE, dev->keybit);
- __set_bit(REL_WHEEL, dev->relbit);
- __set_bit(REL_HWHEEL, dev->relbit);
+ __set_bit(INPUT_PROP_POINTER, dev->propbit);
+ /* Touchpad */
+ __set_bit(BTN_TOUCH, dev->keybit);
+ __set_bit(BTN_TOOL_FINGER, dev->keybit);
+ /* Buttons */
+ __set_bit(BTN_LEFT, dev->keybit);
+ __set_bit(BTN_RIGHT, dev->keybit);
+ __clear_bit(BTN_MIDDLE, dev->keybit);
+
+ /* Absolute position */
+ __set_bit(EV_ABS, dev->evbit);
+ input_set_abs_params(dev, ABS_X, 0, BYD_PAD_WIDTH, 0, 0);
+ input_set_abs_params(dev, ABS_Y, 0, BYD_PAD_HEIGHT, 0, 0);
+ input_abs_set_res(dev, ABS_X, BYD_PAD_RESOLUTION);
+ input_abs_set_res(dev, ABS_Y, BYD_PAD_RESOLUTION);
+ /* No relative support */
+ __clear_bit(EV_REL, dev->evbit);
+ __clear_bit(REL_X, dev->relbit);
+ __clear_bit(REL_Y, dev->relbit);

return 0;
}
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 39d1bec..5784e20 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -846,7 +846,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
#ifdef CONFIG_MOUSE_PS2_BYD
{
.type = PSMOUSE_BYD,
- .name = "BydPS/2",
+ .name = "BYDPS/2",
.alias = "byd",
.detect = byd_detect,
.init = byd_init,
--
2.6.4




On 02/09/2016 03:36 PM, Chris Diamand wrote:
> Hi Richard,
>
> The patch applies! So your email client is working at last :)
>
> Looks good, just some style issues to fix now.
>
>> Updated BYD driver to report absolute coordinates and single-touch events.
>>
>> Signed-off-by: Richard Pospesel <pospeselr@xxxxxxxxx>
>> ---o
>
> I think the commit message needs to follow some style guidelines as
> well. Something like:
>
> Input: byd - report absolute coordinates
> <blank line>
> More details...
>
> Also can you use `git format-patch' to create your patches? That'll
> include your name and email so people can commit the patch directly
> with `git am'.
>
>> diff --git a/drivers/input/mouse/byd.c b/drivers/input/mouse/byd.c
>> index 9425e0f..2900a3d 100644
>> --- a/drivers/input/mouse/byd.c
>> +++ b/drivers/input/mouse/byd.c
>> @@ -2,20 +2,32 @@
>> * BYD TouchPad PS/2 mouse driver
>> *
>> * Copyright (C) 2015 Chris Diamand <chris@xxxxxxxxxxx>
>> + * Copyright (C) 2015 Richard Pospesel
>> + * Copyright (C) 2015 Tai Chi Minh Ralph Eastwood
>> + * Copyright (C) 2015 Martin Wimpress
>> + * Copyright (C) 2015 Jay Kuri
>> *
>> * This program is free software; you can redistribute it and/or modify it
>> * under the terms of the GNU General Public License version 2 as published by
>> * the Free Software Foundation.
>> + *
>> + * Protocol of BYD Touch Pad reverse-engineered from windows driver:
>> + * filename: "byd touchpad driver - win7, 8, 8.1 - 2.4.1.102.zip"
>> + * md5: 0d5e4660b98fca9587a0df212fca3048
>> + * sha1: 97a0eca8edc482bf9d08ab9509084a514dad4c4b
>> + * datasheet: http://bydit.com/userfiles/file/BTP10463-XXX.pdf
>> */
>>
>> #include <linux/delay.h>
>> #include <linux/input.h>
>> #include <linux/libps2.h>
>> #include <linux/serio.h>
>> +#include <linux/slab.h>
>>
>> #include "psmouse.h"
>> #include "byd.h"
>>
>> +/* PS2 Bits */
>> #define PS2_Y_OVERFLOW BIT_MASK(7)
>> #define PS2_X_OVERFLOW BIT_MASK(6)
>> #define PS2_Y_SIGN BIT_MASK(5)
>> @@ -26,69 +38,246 @@
>> #define PS2_LEFT BIT_MASK(0)
>>
>> /*
>> - * The touchpad reports gestures in the last byte of each packet. It can take
>> - * any of the following values:
>> + * BYD pad constants
>> */
>>
>> -/* One-finger scrolling in one of the edge scroll zones. */
>> -#define BYD_SCROLLUP 0xCA
>> -#define BYD_SCROLLDOWN 0x36
>> -#define BYD_SCROLLLEFT 0xCB
>> -#define BYD_SCROLLRIGHT 0x35
>> -/* Two-finger scrolling. */
>> -#define BYD_2DOWN 0x2B
>> -#define BYD_2UP 0xD5
>> -#define BYD_2LEFT 0xD6
>> -#define BYD_2RIGHT 0x2A
>> -/* Pinching in or out. */
>> -#define BYD_ZOOMOUT 0xD8
>> -#define BYD_ZOOMIN 0x28
>> -/* Three-finger swipe. */
>> -#define BYD_3UP 0xD3
>> -#define BYD_3DOWN 0x2D
>> -#define BYD_3LEFT 0xD4
>> -#define BYD_3RIGHT 0x2C
>> -/* Four-finger swipe. */
>> -#define BYD_4UP 0xCD
>> -#define BYD_4DOWN 0x33
>> +/*
>> + * True device resolution is unknown, however experiments show the
>> + * resolution is about 111 units/mm.
>> + * Absolute coordinate packets are in the range 0-255 for both X and Y
>> + * we pick ABS_X/ABS_Y dimensions which are multiples of 256 and in
>> + * the right ballpark given the touchpad's physical dimensions and estimate
>> + * resolution per spec sheet, device active area dimensions are
>> + * 101.6 x 60.1 mm.
>> + */
>> +#define BYD_PAD_WIDTH 11264
>> +#define BYD_PAD_HEIGHT 6656
>> +#define BYD_PAD_RESOLUTION 111
>>
>> -int byd_detect(struct psmouse *psmouse, bool set_properties)
>> -{
>> - struct ps2dev *ps2dev = &psmouse->ps2dev;
>> - unsigned char param[4];
>> +/*
>> + * Given the above dimensions, relative packets velocity is in multiples of
>> + * 1 unit / 11 milliseconds. We use this dt to estimate distance traveled
>> + */
>> +#define BYD_DT 11
>> +/* Time in milliseconds used to timeout various touch events */
>> +#define BYD_TOUCH_TIMEOUT 64
>>
>> - param[0] = 0x03;
>> - param[1] = 0x00;
>> - param[2] = 0x00;
>> - param[3] = 0x00;
>> +/* BYD commands reverse engineered from windows driver */
>>
>> - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> - return -1;
>> - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> - return -1;
>> - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> - return -1;
>> - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> - return -1;
>> - if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
>> - return -1;
>> -
>> - if (param[1] != 0x03 || param[2] != 0x64)
>> - return -ENODEV;
>> +/*
>> + * Swipe gesture from off-pad to on-pad
>> + * 0 : disable
>> + * 1 : enable
>> + */
>> +#define BYD_CMD_SET_OFFSCREEN_SWIPE 0x10cc
>> +/*
>> + * Tap and drag delay time
>> + * 0 : disable
>> + * 1 - 8 : least to most delay
>> + */
>> +#define BYD_CMD_SET_TAP_DRAG_DELAY_TIME 0x10cf
>> +/*
>> + * Physical buttons function mapping
>> + * 0 : enable
>> + * 4 : normal
>> + * 5 : left button custom command
>> + * 6 : right button custom command
>> + * 8 : disable
>> + */
>> +#define BYD_CMD_SET_PHYSICAL_BUTTONS 0x10d0
>> +/*
>> + * Absolute mode (1 byte X/Y resolution)
>> + * 0 : disable
>> + * 2 : enable
>> + */
>> +#define BYD_CMD_SET_ABSOLUTE_MODE 0x10d1
>> +/*
>> + * Two finger scrolling
>> + * 1 : vertical
>> + * 2 : horizontal
>> + * 3 : vertical + horizontal
>> + * 4 : disable
>> + */
>> +#define BYD_CMD_SET_TWO_FINGER_SCROLL 0x10d2
>> +/*
>> + * Handedness
>> + * 1 : right handed
>> + * 2 : left handed
>> + */
>> +#define BYD_CMD_SET_HANDEDNESS 0x10d3
>> +/*
>> + * Tap to click
>> + * 1 : enable
>> + * 2 : disable
>> + */
>> +#define BYD_CMD_SET_TAP 0x10d4
>> +/*
>> + * Tap and drag
>> + * 1 : tap and hold to drag
>> + * 2 : tap and hold to drag + lock
>> + * 3 : disable
>> + */
>> +#define BYD_CMD_SET_TAP_DRAG 0x10d5
>> +/*
>> + * Touch sensitivity
>> + * 1 - 7 : least to most sensitive
>> + */
>> +#define BYD_CMD_SET_TOUCH_SENSITIVITY 0x10d6
>> +/*
>> + * One finger scrolling
>> + * 1 : vertical
>> + * 2 : horizontal
>> + * 3 : vertical + horizontal
>> + * 4 : disable
>> + */
>> +#define BYD_CMD_SET_ONE_FINGER_SCROLL 0x10d7
>> +/*
>> + * One finger scrolling function
>> + * 1 : free scrolling
>> + * 2 : edge motion
>> + * 3 : free scrolling + edge motion
>> + * 4 : disable
>> + */
>> +#define BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC 0x10d8
>> +/*
>> + * Sliding speed
>> + * 1 - 5 : slowest to fastest
>> + */
>> +#define BYD_CMD_SET_SLIDING_SPEED 0x10da
>> +/*
>> + * Edge motion
>> + * 1 : disable
>> + * 2 : enable when dragging
>> + * 3 : enable when dragging and pointing
>> + */
>> +#define BYD_CMD_SET_EDGE_MOTION 0x10db
>> +/*
>> + * Left edge region size
>> + * 0 - 7 : smallest to largest width
>> + */
>> +#define BYD_CMD_SET_LEFT_EDGE_REGION 0x10dc
>> +/*
>> + * Top edge region size
>> + * 0 - 9 : smallest to largest height
>> + */
>> +#define BYD_CMD_SET_TOP_EDGE_REGION 0x10dd
>> +/*
>> + * Disregard palm press as clicks
>> + * 1 - 6 : smallest to largest
>> + */
>> +#define BYD_CMD_SET_PALM_CHECK 0x10de
>> +/*
>> + * Right edge region size
>> + * 0 - 7 : smallest to largest width
>> + */
>> +#define BYD_CMD_SET_RIGHT_EDGE_REGION 0x10df
>> +/*
>> + * Bottom edge region size
>> + * 0 - 9 : smallest to largest height
>> + */
>> +#define BYD_CMD_SET_BOTTOM_EDGE_REGION 0x10e1
>> +/*
>> + * Multitouch gestures
>> + * 1 : enable
>> + * 2 : disable
>> + */
>> +#define BYD_CMD_SET_MULTITOUCH 0x10e3
>> +/*
>> + * Edge motion speed
>> + * 0 : control with finger pressure
>> + * 1 - 9 : slowest to fastest
>> + */
>> +#define BYD_CMD_SET_EDGE_MOTION_SPEED 0x10e4
>> +/*
>> + * Two finger scolling function
>> + * 0 : free scrolling
>> + * 1 : free scrolling (with momentum)
>> + * 2 : edge motion
>> + * 3 : free scrolling (with momentum) + edge motion
>> + * 4 : disable
>> + */
>> +#define BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC 0x10e5
>>
>> - psmouse_dbg(psmouse, "BYD touchpad detected\n");
>> +/*
>> + * The touchpad generates a mixture of absolute and relative packets, indicated
>> + * by the the last byte of each packet being set to one of the following:
>> + */
>> +#define BYD_PACKET_ABSOLUTE 0xF8
>> +#define BYD_PACKET_RELATIVE 0x00
>> +/* Multitouch gesture packets */
>> +#define BYD_PACKET_PINCH_IN 0xd8
>> +#define BYD_PACKET_PINCH_OUT 0x28
>> +#define BYD_PACKET_ROTATE_CLOCKWISE 0x29
>> +#define BYD_PACKET_ROTATE_ANTICLOCKWISE 0xd7
>> +#define BYD_PACKET_TWO_FINGER_SCROLL_RIGHT 0x2a
>> +#define BYD_PACKET_TWO_FINGER_SCROLL_DOWN 0x2b
>> +#define BYD_PACKET_TWO_FINGER_SCROLL_UP 0xd5
>> +#define BYD_PACKET_TWO_FINGER_SCROLL_LEFT 0xd6
>> +#define BYD_PACKET_THREE_FINGER_SWIPE_RIGHT 0x2c
>> +#define BYD_PACKET_THREE_FINGER_SWIPE_DOWN 0x2d
>> +#define BYD_PACKET_THREE_FINGER_SWIPE_UP 0xd3
>> +#define BYD_PACKET_THREE_FINGER_SWIPE_LEFT 0xd4
>> +#define BYD_PACKET_FOUR_FINGER_DOWN 0x33
>> +#define BYD_PACKET_FOUR_FINGER_UP 0xcd
>> +#define BYD_PACKET_REGION_SCROLL_RIGHT 0x35
>> +#define BYD_PACKET_REGION_SCROLL_DOWN 0x36
>> +#define BYD_PACKET_REGION_SCROLL_UP 0xca
>> +#define BYD_PACKET_REGION_SCROLL_LEFT 0xcb
>> +#define BYD_PACKET_RIGHT_CORNER_CLICK 0xd2
>> +#define BYD_PACKET_LEFT_CORNER_CLICK 0x2e
>> +#define BYD_PACKET_LEFT_AND_RIGHT_CORNER_CLICK 0x2f
>> +#define BYD_PACKET_ONTO_PAD_SWIPE_RIGHT 0x37
>> +#define BYD_PACKET_ONTO_PAD_SWIPE_DOWN 0x30
>> +#define BYD_PACKET_ONTO_PAD_SWIPE_UP 0xd0
>> +#define BYD_PACKET_ONTO_PAD_SWIPE_LEFT 0xc9
>
> Hmm. There aren't aligned to a multiple of 8. Can they be?
>
> Also, re. using tabs or spaces for these - I personally have no
> particular preference, and I looked around other drivers and couldn't
> find any particular pattern. But: when Dmitry applied my patch, he
> changed my spaces to tabs. So we should probably go with that :)
>
>> +
>> +struct byd_data {
>> + struct timer_list timer;
>> + s32 abs_x;
>> + s32 abs_y;
>> + u32 last_touch_time;
>> + bool btn_left : 1;
>> + bool btn_right : 1;
>> + bool touch : 1;
>> +};
>> +
>> +static void byd_report_input(struct psmouse *psmouse)
>> +{
>> + struct byd_data *priv = psmouse->private;
>> + struct input_dev *dev = psmouse->dev;
>>
>> - if (set_properties) {
>> - psmouse->vendor = "BYD";
>> - psmouse->name = "TouchPad";
>> - }
>> + input_report_abs(dev, ABS_X, priv->abs_x);
>> + input_report_abs(dev, ABS_Y, priv->abs_y);
>> + input_report_key(dev, BTN_LEFT, priv->btn_left);
>> + input_report_key(dev, BTN_RIGHT, priv->btn_right);
>> + input_report_key(dev, BTN_TOUCH, priv->touch);
>> + input_report_key(dev, BTN_TOOL_FINGER, priv->touch);
>> + input_sync(dev);
>> +}
>>
>> - return 0;
>> +static void byd_clear_touch(unsigned long data)
>> +{
>> + struct psmouse *psmouse = (struct psmouse*)data;
>
> According to checkpatch.pl, needs a space between `psmouse' and `*':
>
> (struct psmouse *)
>
> FYI - there's a script, `scripts/checkpatch.pl', which checks for
> style violations - if you run it on your patch it'll pick up stuff
> like this.
>
>> + struct byd_data *priv = psmouse->private;
>> +
>> + serio_pause_rx(psmouse->ps2dev.serio);
>> + priv->touch = false;
>> + /*
>> + * Move cursor back to center of pad when we lose touch - this
>> + * specifically improves user experience when moving cursor with one
>> + * finger, and pressing a button with another.
>> + */
>> + priv->abs_x = BYD_PAD_WIDTH / 2;
>> + priv->abs_y = BYD_PAD_HEIGHT / 2;
>> + byd_report_input(psmouse);
>> +
>> + serio_continue_rx(psmouse->ps2dev.serio);
>> }
>>
>> static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
>> {
>> - struct input_dev *dev = psmouse->dev;
>> + struct byd_data *priv = psmouse->private;
>> + u32 now_msecs = jiffies_to_msecs(jiffies);
>> u8 *pkt = psmouse->packet;
>>
>> if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) {
>> @@ -102,53 +291,33 @@ static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
>>
>> /* Otherwise, a full packet has been received */
>> switch (pkt[3]) {
>> - case 0: {
>> + case BYD_PACKET_ABSOLUTE:
>> + /* Only use absolute packets for the start of movement. */
>> + if (!priv->touch) {
>> + priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256);
>> + priv->abs_y = (255 - pkt[2]) *
>> + (BYD_PAD_HEIGHT / 256);
>> +
>> + /* needed to detect tap */
>> + if (now_msecs - priv->last_touch_time > BYD_TOUCH_TIMEOUT)
>
> Line too long (according to checkpatch).
>
>> + priv->touch = true;
>> + }
>> + break;
>> + case BYD_PACKET_RELATIVE: {
>> /* Standard packet */
>> /* Sign-extend if a sign bit is set. */
>> - unsigned int signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0;
>> - unsigned int signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0;
>> - int dx = signx | (int) pkt[1];
>> - int dy = signy | (int) pkt[2];
>> + u32 signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0;
>> + u32 signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0;
>> + s32 dx = signx | (int) pkt[1];
>> + s32 dy = signy | (int) pkt[2];
>>
>> - input_report_rel(psmouse->dev, REL_X, dx);
>> - input_report_rel(psmouse->dev, REL_Y, -dy);
>> + /* Update position based on velocity */
>> + priv->abs_x += dx * BYD_DT;
>> + priv->abs_y -= dy * BYD_DT;
>>
>> - input_report_key(psmouse->dev, BTN_LEFT, pkt[0] & PS2_LEFT);
>> - input_report_key(psmouse->dev, BTN_RIGHT, pkt[0] & PS2_RIGHT);
>> - input_report_key(psmouse->dev, BTN_MIDDLE, pkt[0] & PS2_MIDDLE);
>> + priv->touch = true;
>> break;
>> }
>> -
>> - case BYD_SCROLLDOWN:
>> - case BYD_2DOWN:
>> - input_report_rel(dev, REL_WHEEL, -1);
>> - break;
>> -
>> - case BYD_SCROLLUP:
>> - case BYD_2UP:
>> - input_report_rel(dev, REL_WHEEL, 1);
>> - break;
>> -
>> - case BYD_SCROLLLEFT:
>> - case BYD_2LEFT:
>> - input_report_rel(dev, REL_HWHEEL, -1);
>> - break;
>> -
>> - case BYD_SCROLLRIGHT:
>> - case BYD_2RIGHT:
>> - input_report_rel(dev, REL_HWHEEL, 1);
>> - break;
>> -
>> - case BYD_ZOOMOUT:
>> - case BYD_ZOOMIN:
>> - case BYD_3UP:
>> - case BYD_3DOWN:
>> - case BYD_3LEFT:
>> - case BYD_3RIGHT:
>> - case BYD_4UP:
>> - case BYD_4DOWN:
>> - break;
>> -
>> default:
>> psmouse_warn(psmouse,
>> "Unrecognized Z: pkt = %02x %02x %02x %02x\n",
>> @@ -157,134 +326,76 @@ static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
>> return PSMOUSE_BAD_DATA;
>> }
>>
>> - input_sync(dev);
>> + priv->btn_left = pkt[0] & PS2_LEFT;
>> + priv->btn_right = pkt[0] & PS2_RIGHT;
>>
>> - return PSMOUSE_FULL_PACKET;
>> -}
>> -
>> -/* Send a sequence of bytes, where each is ACKed before the next is sent. */
>> -static int byd_send_sequence(struct psmouse *psmouse, const u8 *seq, size_t len)
>> -{
>> - unsigned int i;
>> + byd_report_input(psmouse);
>>
>> - for (i = 0; i < len; ++i) {
>> - if (ps2_command(&psmouse->ps2dev, NULL, seq[i]))
>> - return -1;
>> + /* Reset time since last touch. */
>> + if (priv->touch) {
>> + priv->last_touch_time = now_msecs;
>> + mod_timer(&priv->timer, jiffies + msecs_to_jiffies(BYD_TOUCH_TIMEOUT));
>
> Line too long (according to checkpatch).
>
>> }
>> - return 0;
>> -}
>> -
>> -/* Keep scrolling after fingers are removed. */
>> -#define SCROLL_INERTIAL 0x01
>> -#define SCROLL_NO_INERTIAL 0x02
>> -
>> -/* Clicking can be done by tapping or pressing. */
>> -#define CLICK_BOTH 0x01
>> -/* Clicking can only be done by pressing. */
>> -#define CLICK_PRESS_ONLY 0x02
>> -
>> -static int byd_enable(struct psmouse *psmouse)
>> -{
>> - const u8 seq1[] = { 0xE2, 0x00, 0xE0, 0x02, 0xE0 };
>> - const u8 seq2[] = {
>> - 0xD3, 0x01,
>> - 0xD0, 0x00,
>> - 0xD0, 0x04,
>> - /* Whether clicking is done by tapping or pressing. */
>> - 0xD4, CLICK_PRESS_ONLY,
>> - 0xD5, 0x01,
>> - 0xD7, 0x03,
>> - /* Vertical and horizontal one-finger scroll zone inertia. */
>> - 0xD8, SCROLL_INERTIAL,
>> - 0xDA, 0x05,
>> - 0xDB, 0x02,
>> - 0xE4, 0x05,
>> - 0xD6, 0x01,
>> - 0xDE, 0x04,
>> - 0xE3, 0x01,
>> - 0xCF, 0x00,
>> - 0xD2, 0x03,
>> - /* Vertical and horizontal two-finger scrolling inertia. */
>> - 0xE5, SCROLL_INERTIAL,
>> - 0xD9, 0x02,
>> - 0xD9, 0x07,
>> - 0xDC, 0x03,
>> - 0xDD, 0x03,
>> - 0xDF, 0x03,
>> - 0xE1, 0x03,
>> - 0xD1, 0x00,
>> - 0xCE, 0x00,
>> - 0xCC, 0x00,
>> - 0xE0, 0x00,
>> - 0xE2, 0x01
>> - };
>> - u8 param[4];
>> -
>> - if (byd_send_sequence(psmouse, seq1, ARRAY_SIZE(seq1)))
>> - return -1;
>>
>> - /* Send a 0x01 command, which should return 4 bytes. */
>> - if (ps2_command(&psmouse->ps2dev, param, 0x0401))
>> - return -1;
>> -
>> - if (byd_send_sequence(psmouse, seq2, ARRAY_SIZE(seq2)))
>> - return -1;
>> -
>> - return 0;
>> + return PSMOUSE_FULL_PACKET;
>> }
>>
>> -/*
>> - * Send the set of PS/2 commands required to make it identify as an
>> - * intellimouse with 4-byte instead of 3-byte packets.
>> - */
>> -static int byd_send_intellimouse_sequence(struct psmouse *psmouse)
>> +static int byd_reset_touchpad(struct psmouse *psmouse)
>> {
>> struct ps2dev *ps2dev = &psmouse->ps2dev;
>> u8 param[4];
>> - int i;
>> + size_t i;
>> +
>> const struct {
>> u16 command;
>> u8 arg;
>> } seq[] = {
>> - { PSMOUSE_CMD_RESET_BAT, 0 },
>> - { PSMOUSE_CMD_RESET_BAT, 0 },
>> - { PSMOUSE_CMD_GETID, 0 },
>> - { PSMOUSE_CMD_SETSCALE11, 0 },
>> - { PSMOUSE_CMD_SETSCALE11, 0 },
>> - { PSMOUSE_CMD_SETSCALE11, 0 },
>> - { PSMOUSE_CMD_GETINFO, 0 },
>> - { PSMOUSE_CMD_SETRES, 0x03 },
>> + /*
>> + * Intellimouse initialization sequence, to get 4-byte instead
>> + * of 3-byte packets.
>> + */
>> { PSMOUSE_CMD_SETRATE, 0xC8 },
>> { PSMOUSE_CMD_SETRATE, 0x64 },
>> { PSMOUSE_CMD_SETRATE, 0x50 },
>> { PSMOUSE_CMD_GETID, 0 },
>> - { PSMOUSE_CMD_SETRATE, 0xC8 },
>> - { PSMOUSE_CMD_SETRATE, 0xC8 },
>> - { PSMOUSE_CMD_SETRATE, 0x50 },
>> - { PSMOUSE_CMD_GETID, 0 },
>> - { PSMOUSE_CMD_SETRATE, 0x64 },
>> - { PSMOUSE_CMD_SETRES, 0x03 },
>> - { PSMOUSE_CMD_ENABLE, 0 }
>> + { PSMOUSE_CMD_ENABLE, 0 },
>> + /*
>> + * BYD-specific initialization, which enables absolute mode and
>> + * (if desired), the touchpad's built-in gesture detection.
>> + */
>> + { 0x10E2, 0x00 },
>> + { 0x10E0, 0x02 },
>> + /* The touchpad should reply with 4 seemingly-random bytes */
>> + { 0x14E0, 0x01 },
>> + /* Pairs of parameters and values. */
>> + { BYD_CMD_SET_HANDEDNESS, 0x01 },
>> + { BYD_CMD_SET_PHYSICAL_BUTTONS, 0x04 },
>> + { BYD_CMD_SET_TAP, 0x02 },
>> + { BYD_CMD_SET_ONE_FINGER_SCROLL, 0x04 },
>> + { BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC, 0x04 },
>> + { BYD_CMD_SET_EDGE_MOTION, 0x01 },
>> + { BYD_CMD_SET_PALM_CHECK, 0x00 },
>> + { BYD_CMD_SET_MULTITOUCH, 0x02 },
>> + { BYD_CMD_SET_TWO_FINGER_SCROLL, 0x04 },
>> + { BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC, 0x04 },
>> + { BYD_CMD_SET_LEFT_EDGE_REGION, 0x00 },
>> + { BYD_CMD_SET_TOP_EDGE_REGION, 0x00 },
>> + { BYD_CMD_SET_RIGHT_EDGE_REGION, 0x00 },
>> + { BYD_CMD_SET_BOTTOM_EDGE_REGION, 0x00 },
>> + { BYD_CMD_SET_ABSOLUTE_MODE, 0x02 },
>> + /* Finalize initialization. */
>> + { 0x10E0, 0x00 },
>> + { 0x10E2, 0x01 },
>> };
>>
>> - memset(param, 0, sizeof(param));
>> for (i = 0; i < ARRAY_SIZE(seq); ++i) {
>> + memset(param, 0, sizeof(param));
>> param[0] = seq[i].arg;
>> if (ps2_command(ps2dev, param, seq[i].command))
>> - return -1;
>> - }
>> -
>> - return 0;
>> -}
>> -
>> -static int byd_reset_touchpad(struct psmouse *psmouse)
>> -{
>> - if (byd_send_intellimouse_sequence(psmouse))
>> - return -EIO;
>> -
>> - if (byd_enable(psmouse))
>> - return -EIO;
>> + return -EIO;
>>
>> + }
>> + psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
>> return 0;
>> }
>>
>> @@ -314,9 +425,50 @@ static int byd_reconnect(struct psmouse *psmouse)
>> return 0;
>> }
>>
>> +static void byd_disconnect(struct psmouse *psmouse)
>> +{
>> + struct byd_data *priv = psmouse->private;
>> +
>> + if (priv) {
>> + del_timer(&priv->timer);
>> + kfree(psmouse->private);
>> + psmouse->private = NULL;
>> + }
>> +}
>> +
>> +int byd_detect(struct psmouse *psmouse, bool set_properties)
>> +{
>> + struct ps2dev *ps2dev = &psmouse->ps2dev;
>> + u8 param[4] = {0x03, 0x00, 0x00, 0x00};
>> +
>> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> + return -1;
>> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> + return -1;
>> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> + return -1;
>> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
>> + return -1;
>> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
>> + return -1;
>> +
>> + if (param[1] != 0x03 || param[2] != 0x64)
>> + return -ENODEV;
>> +
>> + psmouse_dbg(psmouse, "BYD touchpad detected\n");
>> +
>> + if (set_properties) {
>> + psmouse->vendor = "BYD";
>> + psmouse->name = "TouchPad";
>> + }
>> +
>> + return 0;
>> +}
>> +
>> int byd_init(struct psmouse *psmouse)
>> {
>> struct input_dev *dev = psmouse->dev;
>> + struct byd_data *priv;
>>
>> if (psmouse_reset(psmouse))
>> return -EIO;
>> @@ -324,14 +476,39 @@ int byd_init(struct psmouse *psmouse)
>> if (byd_reset_touchpad(psmouse))
>> return -EIO;
>>
>> + priv = kzalloc(sizeof(*priv), GFP_KERNEL);
>> + if (!priv)
>> + return -ENOMEM;
>> +
>> + memset(priv, 0, sizeof(*priv));
>> + setup_timer(&priv->timer, byd_clear_touch, (unsigned long) psmouse);
>> +
>> + psmouse->private = priv;
>> + psmouse->disconnect = byd_disconnect;
>> psmouse->reconnect = byd_reconnect;
>> psmouse->protocol_handler = byd_process_byte;
>> psmouse->pktsize = 4;
>> psmouse->resync_time = 0;
>>
>> - __set_bit(BTN_MIDDLE, dev->keybit);
>> - __set_bit(REL_WHEEL, dev->relbit);
>> - __set_bit(REL_HWHEEL, dev->relbit);
>> + __set_bit(INPUT_PROP_POINTER, dev->propbit);
>> + /* Touchpad */
>> + __set_bit(BTN_TOUCH, dev->keybit);
>> + __set_bit(BTN_TOOL_FINGER, dev->keybit);
>> + /* Buttons */
>> + __set_bit(BTN_LEFT, dev->keybit);
>> + __set_bit(BTN_RIGHT, dev->keybit);
>> + __clear_bit(BTN_MIDDLE, dev->keybit);
>> +
>> + /* Absolute position */
>> + __set_bit(EV_ABS, dev->evbit);
>> + input_set_abs_params(dev, ABS_X, 0, BYD_PAD_WIDTH, 0, 0);
>> + input_set_abs_params(dev, ABS_Y, 0, BYD_PAD_HEIGHT, 0, 0);
>> + input_abs_set_res(dev, ABS_X, BYD_PAD_RESOLUTION);
>> + input_abs_set_res(dev, ABS_Y, BYD_PAD_RESOLUTION);
>> + /* No relative support */
>> + __clear_bit(EV_REL, dev->evbit);
>> + __clear_bit(REL_X, dev->relbit);
>> + __clear_bit(REL_Y, dev->relbit);
>>
>> return 0;
>> }
>> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
>> index 39d1bec..5784e20 100644
>> --- a/drivers/input/mouse/psmouse-base.c
>> +++ b/drivers/input/mouse/psmouse-base.c
>> @@ -846,7 +846,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
>> #ifdef CONFIG_MOUSE_PS2_BYD
>> {
>> .type = PSMOUSE_BYD,
>> - .name = "BydPS/2",
>> + .name = "BYDPS/2",
>> .alias = "byd",
>> .detect = byd_detect,
>> .init = byd_init,
>
> Cheers,
> Chris
>