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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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)#define PS2_X_SIGN BIT_MASK(4)#define PS2_ALWAYS_1 BIT_MASK(3)#define PS2_MIDDLE BIT_MASK(2)#define PS2_RIGHT BIT_MASK(1)#define PS2_LEFT BIT_MASK(0)
/* * BYD pad constants */
/* * 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
/* * 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 jiffies used to timeout various touch events (64 ms) */#define BYD_TOUCH_TIMEOUT msecs_to_jiffies(64)
/* BYD commands reverse engineered from windows driver */
/* * 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
/* * The touchpad generates a mixture of absolute and relative packets, indicated * by 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; struct psmouse *psmouse; s32 abs_x; s32 abs_y; typeof(jiffies) last_touch_time; bool btn_left; bool btn_right; bool touch;};
static void byd_report_input(struct psmouse *psmouse){ struct byd_data *priv = psmouse->private; struct input_dev *dev = psmouse->dev;
input_report_key(dev, BTN_TOUCH, priv->touch); input_report_key(dev, BTN_TOOL_FINGER, priv->touch);
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_sync(dev);}
static void byd_clear_touch(struct timer_list *t){ struct byd_data *priv = timer_container_of(priv, t, timer); struct psmouse *psmouse = priv->psmouse;
guard(serio_pause_rx)(psmouse->ps2dev.serio);
priv->touch = false;
byd_report_input(psmouse);
/* * 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;}
static psmouse_ret_t byd_process_byte(struct psmouse *psmouse){ struct byd_data *priv = psmouse->private; u8 *pkt = psmouse->packet;
if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) { psmouse_warn(psmouse, "Always_1 bit not 1. pkt[0] = %02x\n", pkt[0]); return PSMOUSE_BAD_DATA; }
if (psmouse->pktcnt < psmouse->pktsize) return PSMOUSE_GOOD_DATA;
/* Otherwise, a full packet has been received */ switch (pkt[3]) { case BYD_PACKET_ABSOLUTE: /* Only use absolute packets for the start of movement. */ if (!priv->touch) { /* needed to detect tap */ typeof(jiffies) tap_time = priv->last_touch_time + BYD_TOUCH_TIMEOUT; priv->touch = time_after(jiffies, tap_time);
/* init abs position */ priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256); priv->abs_y = (255 - pkt[2]) * (BYD_PAD_HEIGHT / 256); } break; case BYD_PACKET_RELATIVE: { /* Standard packet */ /* Sign-extend if a sign bit is set. */ 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];
/* Update position based on velocity */ priv->abs_x += dx * BYD_DT; priv->abs_y -= dy * BYD_DT;
priv->touch = true; break; } default: psmouse_warn(psmouse, "Unrecognized Z: pkt = %*ph\n", 4, psmouse->packet); return PSMOUSE_BAD_DATA; }
priv->btn_left = pkt[0] & PS2_LEFT; priv->btn_right = pkt[0] & PS2_RIGHT;
byd_report_input(psmouse);
/* Reset time since last touch. */ if (priv->touch) { priv->last_touch_time = jiffies; mod_timer(&priv->timer, jiffies + BYD_TOUCH_TIMEOUT); }
return PSMOUSE_FULL_PACKET;}
static int byd_reset_touchpad(struct psmouse *psmouse){ struct ps2dev *ps2dev = &psmouse->ps2dev; u8 param[4]; size_t i;
static const struct { u16 command; u8 arg; } seq[] = { /* * 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_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 }, };
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 -EIO; }
psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); return 0;}
static int byd_reconnect(struct psmouse *psmouse){ int retry = 0, error = 0;
psmouse_dbg(psmouse, "Reconnect\n"); do { psmouse_reset(psmouse); if (retry) ssleep(1); error = byd_detect(psmouse, 0); } while (error && ++retry < 3);
if (error) return error;
psmouse_dbg(psmouse, "Reconnected after %d attempts\n", retry);
error = byd_reset_touchpad(psmouse); if (error) { psmouse_err(psmouse, "Unable to initialize device\n"); return error; }
return 0;}
static void byd_disconnect(struct psmouse *psmouse){ struct byd_data *priv = psmouse->private;
if (priv) { timer_shutdown_sync(&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;
if (byd_reset_touchpad(psmouse)) return -EIO;
priv = kzalloc_obj(*priv); if (!priv) return -ENOMEM;
priv->psmouse = psmouse; timer_setup(&priv->timer, byd_clear_touch, 0);
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(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;}