198ee3771SChris Diamand /* 298ee3771SChris Diamand * BYD TouchPad PS/2 mouse driver 398ee3771SChris Diamand * 498ee3771SChris Diamand * Copyright (C) 2015 Chris Diamand <chris@diamand.org> 582aaa086SChris Diamand * Copyright (C) 2015 Richard Pospesel 682aaa086SChris Diamand * Copyright (C) 2015 Tai Chi Minh Ralph Eastwood 782aaa086SChris Diamand * Copyright (C) 2015 Martin Wimpress 882aaa086SChris Diamand * Copyright (C) 2015 Jay Kuri 998ee3771SChris Diamand * 1098ee3771SChris Diamand * This program is free software; you can redistribute it and/or modify it 1198ee3771SChris Diamand * under the terms of the GNU General Public License version 2 as published by 1298ee3771SChris Diamand * the Free Software Foundation. 1398ee3771SChris Diamand */ 1498ee3771SChris Diamand 1598ee3771SChris Diamand #include <linux/delay.h> 1698ee3771SChris Diamand #include <linux/input.h> 1798ee3771SChris Diamand #include <linux/libps2.h> 1898ee3771SChris Diamand #include <linux/serio.h> 192d5f5611SRichard Pospesel #include <linux/slab.h> 2098ee3771SChris Diamand 2198ee3771SChris Diamand #include "psmouse.h" 2298ee3771SChris Diamand #include "byd.h" 2398ee3771SChris Diamand 242d5f5611SRichard Pospesel /* PS2 Bits */ 2598ee3771SChris Diamand #define PS2_Y_OVERFLOW BIT_MASK(7) 2698ee3771SChris Diamand #define PS2_X_OVERFLOW BIT_MASK(6) 2798ee3771SChris Diamand #define PS2_Y_SIGN BIT_MASK(5) 2898ee3771SChris Diamand #define PS2_X_SIGN BIT_MASK(4) 2998ee3771SChris Diamand #define PS2_ALWAYS_1 BIT_MASK(3) 3098ee3771SChris Diamand #define PS2_MIDDLE BIT_MASK(2) 3198ee3771SChris Diamand #define PS2_RIGHT BIT_MASK(1) 3298ee3771SChris Diamand #define PS2_LEFT BIT_MASK(0) 3398ee3771SChris Diamand 3498ee3771SChris Diamand /* 352d5f5611SRichard Pospesel * BYD pad constants 3698ee3771SChris Diamand */ 3798ee3771SChris Diamand 382d5f5611SRichard Pospesel /* 392d5f5611SRichard Pospesel * True device resolution is unknown, however experiments show the 402d5f5611SRichard Pospesel * resolution is about 111 units/mm. 412d5f5611SRichard Pospesel * Absolute coordinate packets are in the range 0-255 for both X and Y 422d5f5611SRichard Pospesel * we pick ABS_X/ABS_Y dimensions which are multiples of 256 and in 432d5f5611SRichard Pospesel * the right ballpark given the touchpad's physical dimensions and estimate 442d5f5611SRichard Pospesel * resolution per spec sheet, device active area dimensions are 452d5f5611SRichard Pospesel * 101.6 x 60.1 mm. 462d5f5611SRichard Pospesel */ 472d5f5611SRichard Pospesel #define BYD_PAD_WIDTH 11264 482d5f5611SRichard Pospesel #define BYD_PAD_HEIGHT 6656 492d5f5611SRichard Pospesel #define BYD_PAD_RESOLUTION 111 5098ee3771SChris Diamand 512d5f5611SRichard Pospesel /* 522d5f5611SRichard Pospesel * Given the above dimensions, relative packets velocity is in multiples of 532d5f5611SRichard Pospesel * 1 unit / 11 milliseconds. We use this dt to estimate distance traveled 542d5f5611SRichard Pospesel */ 552d5f5611SRichard Pospesel #define BYD_DT 11 562d5f5611SRichard Pospesel /* Time in jiffies used to timeout various touch events (64 ms) */ 572d5f5611SRichard Pospesel #define BYD_TOUCH_TIMEOUT msecs_to_jiffies(64) 582d5f5611SRichard Pospesel 592d5f5611SRichard Pospesel /* BYD commands reverse engineered from windows driver */ 602d5f5611SRichard Pospesel 612d5f5611SRichard Pospesel /* 622d5f5611SRichard Pospesel * Swipe gesture from off-pad to on-pad 632d5f5611SRichard Pospesel * 0 : disable 642d5f5611SRichard Pospesel * 1 : enable 652d5f5611SRichard Pospesel */ 662d5f5611SRichard Pospesel #define BYD_CMD_SET_OFFSCREEN_SWIPE 0x10cc 672d5f5611SRichard Pospesel /* 682d5f5611SRichard Pospesel * Tap and drag delay time 692d5f5611SRichard Pospesel * 0 : disable 702d5f5611SRichard Pospesel * 1 - 8 : least to most delay 712d5f5611SRichard Pospesel */ 722d5f5611SRichard Pospesel #define BYD_CMD_SET_TAP_DRAG_DELAY_TIME 0x10cf 732d5f5611SRichard Pospesel /* 742d5f5611SRichard Pospesel * Physical buttons function mapping 752d5f5611SRichard Pospesel * 0 : enable 762d5f5611SRichard Pospesel * 4 : normal 772d5f5611SRichard Pospesel * 5 : left button custom command 782d5f5611SRichard Pospesel * 6 : right button custom command 792d5f5611SRichard Pospesel * 8 : disable 802d5f5611SRichard Pospesel */ 812d5f5611SRichard Pospesel #define BYD_CMD_SET_PHYSICAL_BUTTONS 0x10d0 822d5f5611SRichard Pospesel /* 832d5f5611SRichard Pospesel * Absolute mode (1 byte X/Y resolution) 842d5f5611SRichard Pospesel * 0 : disable 852d5f5611SRichard Pospesel * 2 : enable 862d5f5611SRichard Pospesel */ 872d5f5611SRichard Pospesel #define BYD_CMD_SET_ABSOLUTE_MODE 0x10d1 882d5f5611SRichard Pospesel /* 892d5f5611SRichard Pospesel * Two finger scrolling 902d5f5611SRichard Pospesel * 1 : vertical 912d5f5611SRichard Pospesel * 2 : horizontal 922d5f5611SRichard Pospesel * 3 : vertical + horizontal 932d5f5611SRichard Pospesel * 4 : disable 942d5f5611SRichard Pospesel */ 952d5f5611SRichard Pospesel #define BYD_CMD_SET_TWO_FINGER_SCROLL 0x10d2 962d5f5611SRichard Pospesel /* 972d5f5611SRichard Pospesel * Handedness 982d5f5611SRichard Pospesel * 1 : right handed 992d5f5611SRichard Pospesel * 2 : left handed 1002d5f5611SRichard Pospesel */ 1012d5f5611SRichard Pospesel #define BYD_CMD_SET_HANDEDNESS 0x10d3 1022d5f5611SRichard Pospesel /* 1032d5f5611SRichard Pospesel * Tap to click 1042d5f5611SRichard Pospesel * 1 : enable 1052d5f5611SRichard Pospesel * 2 : disable 1062d5f5611SRichard Pospesel */ 1072d5f5611SRichard Pospesel #define BYD_CMD_SET_TAP 0x10d4 1082d5f5611SRichard Pospesel /* 1092d5f5611SRichard Pospesel * Tap and drag 1102d5f5611SRichard Pospesel * 1 : tap and hold to drag 1112d5f5611SRichard Pospesel * 2 : tap and hold to drag + lock 1122d5f5611SRichard Pospesel * 3 : disable 1132d5f5611SRichard Pospesel */ 1142d5f5611SRichard Pospesel #define BYD_CMD_SET_TAP_DRAG 0x10d5 1152d5f5611SRichard Pospesel /* 1162d5f5611SRichard Pospesel * Touch sensitivity 1172d5f5611SRichard Pospesel * 1 - 7 : least to most sensitive 1182d5f5611SRichard Pospesel */ 1192d5f5611SRichard Pospesel #define BYD_CMD_SET_TOUCH_SENSITIVITY 0x10d6 1202d5f5611SRichard Pospesel /* 1212d5f5611SRichard Pospesel * One finger scrolling 1222d5f5611SRichard Pospesel * 1 : vertical 1232d5f5611SRichard Pospesel * 2 : horizontal 1242d5f5611SRichard Pospesel * 3 : vertical + horizontal 1252d5f5611SRichard Pospesel * 4 : disable 1262d5f5611SRichard Pospesel */ 1272d5f5611SRichard Pospesel #define BYD_CMD_SET_ONE_FINGER_SCROLL 0x10d7 1282d5f5611SRichard Pospesel /* 1292d5f5611SRichard Pospesel * One finger scrolling function 1302d5f5611SRichard Pospesel * 1 : free scrolling 1312d5f5611SRichard Pospesel * 2 : edge motion 1322d5f5611SRichard Pospesel * 3 : free scrolling + edge motion 1332d5f5611SRichard Pospesel * 4 : disable 1342d5f5611SRichard Pospesel */ 1352d5f5611SRichard Pospesel #define BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC 0x10d8 1362d5f5611SRichard Pospesel /* 1372d5f5611SRichard Pospesel * Sliding speed 1382d5f5611SRichard Pospesel * 1 - 5 : slowest to fastest 1392d5f5611SRichard Pospesel */ 1402d5f5611SRichard Pospesel #define BYD_CMD_SET_SLIDING_SPEED 0x10da 1412d5f5611SRichard Pospesel /* 1422d5f5611SRichard Pospesel * Edge motion 1432d5f5611SRichard Pospesel * 1 : disable 1442d5f5611SRichard Pospesel * 2 : enable when dragging 1452d5f5611SRichard Pospesel * 3 : enable when dragging and pointing 1462d5f5611SRichard Pospesel */ 1472d5f5611SRichard Pospesel #define BYD_CMD_SET_EDGE_MOTION 0x10db 1482d5f5611SRichard Pospesel /* 1492d5f5611SRichard Pospesel * Left edge region size 1502d5f5611SRichard Pospesel * 0 - 7 : smallest to largest width 1512d5f5611SRichard Pospesel */ 1522d5f5611SRichard Pospesel #define BYD_CMD_SET_LEFT_EDGE_REGION 0x10dc 1532d5f5611SRichard Pospesel /* 1542d5f5611SRichard Pospesel * Top edge region size 1552d5f5611SRichard Pospesel * 0 - 9 : smallest to largest height 1562d5f5611SRichard Pospesel */ 1572d5f5611SRichard Pospesel #define BYD_CMD_SET_TOP_EDGE_REGION 0x10dd 1582d5f5611SRichard Pospesel /* 1592d5f5611SRichard Pospesel * Disregard palm press as clicks 1602d5f5611SRichard Pospesel * 1 - 6 : smallest to largest 1612d5f5611SRichard Pospesel */ 1622d5f5611SRichard Pospesel #define BYD_CMD_SET_PALM_CHECK 0x10de 1632d5f5611SRichard Pospesel /* 1642d5f5611SRichard Pospesel * Right edge region size 1652d5f5611SRichard Pospesel * 0 - 7 : smallest to largest width 1662d5f5611SRichard Pospesel */ 1672d5f5611SRichard Pospesel #define BYD_CMD_SET_RIGHT_EDGE_REGION 0x10df 1682d5f5611SRichard Pospesel /* 1692d5f5611SRichard Pospesel * Bottom edge region size 1702d5f5611SRichard Pospesel * 0 - 9 : smallest to largest height 1712d5f5611SRichard Pospesel */ 1722d5f5611SRichard Pospesel #define BYD_CMD_SET_BOTTOM_EDGE_REGION 0x10e1 1732d5f5611SRichard Pospesel /* 1742d5f5611SRichard Pospesel * Multitouch gestures 1752d5f5611SRichard Pospesel * 1 : enable 1762d5f5611SRichard Pospesel * 2 : disable 1772d5f5611SRichard Pospesel */ 1782d5f5611SRichard Pospesel #define BYD_CMD_SET_MULTITOUCH 0x10e3 1792d5f5611SRichard Pospesel /* 1802d5f5611SRichard Pospesel * Edge motion speed 1812d5f5611SRichard Pospesel * 0 : control with finger pressure 1822d5f5611SRichard Pospesel * 1 - 9 : slowest to fastest 1832d5f5611SRichard Pospesel */ 1842d5f5611SRichard Pospesel #define BYD_CMD_SET_EDGE_MOTION_SPEED 0x10e4 1852d5f5611SRichard Pospesel /* 1862d5f5611SRichard Pospesel * Two finger scolling function 1872d5f5611SRichard Pospesel * 0 : free scrolling 1882d5f5611SRichard Pospesel * 1 : free scrolling (with momentum) 1892d5f5611SRichard Pospesel * 2 : edge motion 1902d5f5611SRichard Pospesel * 3 : free scrolling (with momentum) + edge motion 1912d5f5611SRichard Pospesel * 4 : disable 1922d5f5611SRichard Pospesel */ 1932d5f5611SRichard Pospesel #define BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC 0x10e5 1942d5f5611SRichard Pospesel 1952d5f5611SRichard Pospesel /* 1962d5f5611SRichard Pospesel * The touchpad generates a mixture of absolute and relative packets, indicated 1972d5f5611SRichard Pospesel * by the the last byte of each packet being set to one of the following: 1982d5f5611SRichard Pospesel */ 1992d5f5611SRichard Pospesel #define BYD_PACKET_ABSOLUTE 0xf8 2002d5f5611SRichard Pospesel #define BYD_PACKET_RELATIVE 0x00 2012d5f5611SRichard Pospesel /* Multitouch gesture packets */ 2022d5f5611SRichard Pospesel #define BYD_PACKET_PINCH_IN 0xd8 2032d5f5611SRichard Pospesel #define BYD_PACKET_PINCH_OUT 0x28 2042d5f5611SRichard Pospesel #define BYD_PACKET_ROTATE_CLOCKWISE 0x29 2052d5f5611SRichard Pospesel #define BYD_PACKET_ROTATE_ANTICLOCKWISE 0xd7 2062d5f5611SRichard Pospesel #define BYD_PACKET_TWO_FINGER_SCROLL_RIGHT 0x2a 2072d5f5611SRichard Pospesel #define BYD_PACKET_TWO_FINGER_SCROLL_DOWN 0x2b 2082d5f5611SRichard Pospesel #define BYD_PACKET_TWO_FINGER_SCROLL_UP 0xd5 2092d5f5611SRichard Pospesel #define BYD_PACKET_TWO_FINGER_SCROLL_LEFT 0xd6 2102d5f5611SRichard Pospesel #define BYD_PACKET_THREE_FINGER_SWIPE_RIGHT 0x2c 2112d5f5611SRichard Pospesel #define BYD_PACKET_THREE_FINGER_SWIPE_DOWN 0x2d 2122d5f5611SRichard Pospesel #define BYD_PACKET_THREE_FINGER_SWIPE_UP 0xd3 2132d5f5611SRichard Pospesel #define BYD_PACKET_THREE_FINGER_SWIPE_LEFT 0xd4 2142d5f5611SRichard Pospesel #define BYD_PACKET_FOUR_FINGER_DOWN 0x33 2152d5f5611SRichard Pospesel #define BYD_PACKET_FOUR_FINGER_UP 0xcd 2162d5f5611SRichard Pospesel #define BYD_PACKET_REGION_SCROLL_RIGHT 0x35 2172d5f5611SRichard Pospesel #define BYD_PACKET_REGION_SCROLL_DOWN 0x36 2182d5f5611SRichard Pospesel #define BYD_PACKET_REGION_SCROLL_UP 0xca 2192d5f5611SRichard Pospesel #define BYD_PACKET_REGION_SCROLL_LEFT 0xcb 2202d5f5611SRichard Pospesel #define BYD_PACKET_RIGHT_CORNER_CLICK 0xd2 2212d5f5611SRichard Pospesel #define BYD_PACKET_LEFT_CORNER_CLICK 0x2e 2222d5f5611SRichard Pospesel #define BYD_PACKET_LEFT_AND_RIGHT_CORNER_CLICK 0x2f 2232d5f5611SRichard Pospesel #define BYD_PACKET_ONTO_PAD_SWIPE_RIGHT 0x37 2242d5f5611SRichard Pospesel #define BYD_PACKET_ONTO_PAD_SWIPE_DOWN 0x30 2252d5f5611SRichard Pospesel #define BYD_PACKET_ONTO_PAD_SWIPE_UP 0xd0 2262d5f5611SRichard Pospesel #define BYD_PACKET_ONTO_PAD_SWIPE_LEFT 0xc9 2272d5f5611SRichard Pospesel 2282d5f5611SRichard Pospesel struct byd_data { 2292d5f5611SRichard Pospesel struct timer_list timer; 230ce23cbc8SKees Cook struct psmouse *psmouse; 2312d5f5611SRichard Pospesel s32 abs_x; 2322d5f5611SRichard Pospesel s32 abs_y; 2332d5f5611SRichard Pospesel typeof(jiffies) last_touch_time; 2342d5f5611SRichard Pospesel bool btn_left; 2352d5f5611SRichard Pospesel bool btn_right; 2362d5f5611SRichard Pospesel bool touch; 2372d5f5611SRichard Pospesel }; 2382d5f5611SRichard Pospesel 2392d5f5611SRichard Pospesel static void byd_report_input(struct psmouse *psmouse) 24098ee3771SChris Diamand { 2412d5f5611SRichard Pospesel struct byd_data *priv = psmouse->private; 2422d5f5611SRichard Pospesel struct input_dev *dev = psmouse->dev; 24398ee3771SChris Diamand 2442d5f5611SRichard Pospesel input_report_key(dev, BTN_TOUCH, priv->touch); 2452d5f5611SRichard Pospesel input_report_key(dev, BTN_TOOL_FINGER, priv->touch); 24698ee3771SChris Diamand 2472d5f5611SRichard Pospesel input_report_abs(dev, ABS_X, priv->abs_x); 2482d5f5611SRichard Pospesel input_report_abs(dev, ABS_Y, priv->abs_y); 2492d5f5611SRichard Pospesel input_report_key(dev, BTN_LEFT, priv->btn_left); 2502d5f5611SRichard Pospesel input_report_key(dev, BTN_RIGHT, priv->btn_right); 25198ee3771SChris Diamand 2522d5f5611SRichard Pospesel input_sync(dev); 25398ee3771SChris Diamand } 25498ee3771SChris Diamand 255ce23cbc8SKees Cook static void byd_clear_touch(struct timer_list *t) 2562d5f5611SRichard Pospesel { 257ce23cbc8SKees Cook struct byd_data *priv = from_timer(priv, t, timer); 258ce23cbc8SKees Cook struct psmouse *psmouse = priv->psmouse; 2592d5f5611SRichard Pospesel 2602d5f5611SRichard Pospesel serio_pause_rx(psmouse->ps2dev.serio); 2612d5f5611SRichard Pospesel priv->touch = false; 2622d5f5611SRichard Pospesel 2632d5f5611SRichard Pospesel byd_report_input(psmouse); 2642d5f5611SRichard Pospesel 2652d5f5611SRichard Pospesel serio_continue_rx(psmouse->ps2dev.serio); 2662d5f5611SRichard Pospesel 2672d5f5611SRichard Pospesel /* 2682d5f5611SRichard Pospesel * Move cursor back to center of pad when we lose touch - this 2692d5f5611SRichard Pospesel * specifically improves user experience when moving cursor with one 2702d5f5611SRichard Pospesel * finger, and pressing a button with another. 2712d5f5611SRichard Pospesel */ 2722d5f5611SRichard Pospesel priv->abs_x = BYD_PAD_WIDTH / 2; 2732d5f5611SRichard Pospesel priv->abs_y = BYD_PAD_HEIGHT / 2; 27498ee3771SChris Diamand } 27598ee3771SChris Diamand 27698ee3771SChris Diamand static psmouse_ret_t byd_process_byte(struct psmouse *psmouse) 27798ee3771SChris Diamand { 2782d5f5611SRichard Pospesel struct byd_data *priv = psmouse->private; 27998ee3771SChris Diamand u8 *pkt = psmouse->packet; 28098ee3771SChris Diamand 28198ee3771SChris Diamand if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) { 28298ee3771SChris Diamand psmouse_warn(psmouse, "Always_1 bit not 1. pkt[0] = %02x\n", 28398ee3771SChris Diamand pkt[0]); 28498ee3771SChris Diamand return PSMOUSE_BAD_DATA; 28598ee3771SChris Diamand } 28698ee3771SChris Diamand 28798ee3771SChris Diamand if (psmouse->pktcnt < psmouse->pktsize) 28898ee3771SChris Diamand return PSMOUSE_GOOD_DATA; 28998ee3771SChris Diamand 29098ee3771SChris Diamand /* Otherwise, a full packet has been received */ 29198ee3771SChris Diamand switch (pkt[3]) { 2922d5f5611SRichard Pospesel case BYD_PACKET_ABSOLUTE: 2932d5f5611SRichard Pospesel /* Only use absolute packets for the start of movement. */ 2942d5f5611SRichard Pospesel if (!priv->touch) { 2952d5f5611SRichard Pospesel /* needed to detect tap */ 2962d5f5611SRichard Pospesel typeof(jiffies) tap_time = 2972d5f5611SRichard Pospesel priv->last_touch_time + BYD_TOUCH_TIMEOUT; 2982d5f5611SRichard Pospesel priv->touch = time_after(jiffies, tap_time); 2992d5f5611SRichard Pospesel 3002d5f5611SRichard Pospesel /* init abs position */ 3012d5f5611SRichard Pospesel priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256); 3022d5f5611SRichard Pospesel priv->abs_y = (255 - pkt[2]) * (BYD_PAD_HEIGHT / 256); 3032d5f5611SRichard Pospesel } 3042d5f5611SRichard Pospesel break; 3052d5f5611SRichard Pospesel case BYD_PACKET_RELATIVE: { 30698ee3771SChris Diamand /* Standard packet */ 30798ee3771SChris Diamand /* Sign-extend if a sign bit is set. */ 3082d5f5611SRichard Pospesel u32 signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0; 3092d5f5611SRichard Pospesel u32 signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0; 3102d5f5611SRichard Pospesel s32 dx = signx | (int) pkt[1]; 3112d5f5611SRichard Pospesel s32 dy = signy | (int) pkt[2]; 31298ee3771SChris Diamand 3132d5f5611SRichard Pospesel /* Update position based on velocity */ 3142d5f5611SRichard Pospesel priv->abs_x += dx * BYD_DT; 3152d5f5611SRichard Pospesel priv->abs_y -= dy * BYD_DT; 31698ee3771SChris Diamand 3172d5f5611SRichard Pospesel priv->touch = true; 31898ee3771SChris Diamand break; 31998ee3771SChris Diamand } 32098ee3771SChris Diamand default: 32198ee3771SChris Diamand psmouse_warn(psmouse, 32298ee3771SChris Diamand "Unrecognized Z: pkt = %02x %02x %02x %02x\n", 32398ee3771SChris Diamand psmouse->packet[0], psmouse->packet[1], 32498ee3771SChris Diamand psmouse->packet[2], psmouse->packet[3]); 32598ee3771SChris Diamand return PSMOUSE_BAD_DATA; 32698ee3771SChris Diamand } 32798ee3771SChris Diamand 3282d5f5611SRichard Pospesel priv->btn_left = pkt[0] & PS2_LEFT; 3292d5f5611SRichard Pospesel priv->btn_right = pkt[0] & PS2_RIGHT; 3302d5f5611SRichard Pospesel 3312d5f5611SRichard Pospesel byd_report_input(psmouse); 3322d5f5611SRichard Pospesel 3332d5f5611SRichard Pospesel /* Reset time since last touch. */ 3342d5f5611SRichard Pospesel if (priv->touch) { 3352d5f5611SRichard Pospesel priv->last_touch_time = jiffies; 3362d5f5611SRichard Pospesel mod_timer(&priv->timer, jiffies + BYD_TOUCH_TIMEOUT); 3372d5f5611SRichard Pospesel } 33898ee3771SChris Diamand 33998ee3771SChris Diamand return PSMOUSE_FULL_PACKET; 34098ee3771SChris Diamand } 34198ee3771SChris Diamand 3422d5f5611SRichard Pospesel static int byd_reset_touchpad(struct psmouse *psmouse) 34398ee3771SChris Diamand { 34498ee3771SChris Diamand struct ps2dev *ps2dev = &psmouse->ps2dev; 34598ee3771SChris Diamand u8 param[4]; 3462d5f5611SRichard Pospesel size_t i; 3472d5f5611SRichard Pospesel 34808d6ac9eSColin Ian King static const struct { 34998ee3771SChris Diamand u16 command; 35098ee3771SChris Diamand u8 arg; 35198ee3771SChris Diamand } seq[] = { 3522d5f5611SRichard Pospesel /* 3532d5f5611SRichard Pospesel * Intellimouse initialization sequence, to get 4-byte instead 3542d5f5611SRichard Pospesel * of 3-byte packets. 3552d5f5611SRichard Pospesel */ 35698ee3771SChris Diamand { PSMOUSE_CMD_SETRATE, 0xC8 }, 35798ee3771SChris Diamand { PSMOUSE_CMD_SETRATE, 0x64 }, 35898ee3771SChris Diamand { PSMOUSE_CMD_SETRATE, 0x50 }, 35998ee3771SChris Diamand { PSMOUSE_CMD_GETID, 0 }, 3602d5f5611SRichard Pospesel { PSMOUSE_CMD_ENABLE, 0 }, 3612d5f5611SRichard Pospesel /* 3622d5f5611SRichard Pospesel * BYD-specific initialization, which enables absolute mode and 3632d5f5611SRichard Pospesel * (if desired), the touchpad's built-in gesture detection. 3642d5f5611SRichard Pospesel */ 3652d5f5611SRichard Pospesel { 0x10E2, 0x00 }, 3662d5f5611SRichard Pospesel { 0x10E0, 0x02 }, 3672d5f5611SRichard Pospesel /* The touchpad should reply with 4 seemingly-random bytes */ 3682d5f5611SRichard Pospesel { 0x14E0, 0x01 }, 3692d5f5611SRichard Pospesel /* Pairs of parameters and values. */ 3702d5f5611SRichard Pospesel { BYD_CMD_SET_HANDEDNESS, 0x01 }, 3712d5f5611SRichard Pospesel { BYD_CMD_SET_PHYSICAL_BUTTONS, 0x04 }, 3722d5f5611SRichard Pospesel { BYD_CMD_SET_TAP, 0x02 }, 3732d5f5611SRichard Pospesel { BYD_CMD_SET_ONE_FINGER_SCROLL, 0x04 }, 3742d5f5611SRichard Pospesel { BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC, 0x04 }, 3752d5f5611SRichard Pospesel { BYD_CMD_SET_EDGE_MOTION, 0x01 }, 3762d5f5611SRichard Pospesel { BYD_CMD_SET_PALM_CHECK, 0x00 }, 3772d5f5611SRichard Pospesel { BYD_CMD_SET_MULTITOUCH, 0x02 }, 3782d5f5611SRichard Pospesel { BYD_CMD_SET_TWO_FINGER_SCROLL, 0x04 }, 3792d5f5611SRichard Pospesel { BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC, 0x04 }, 3802d5f5611SRichard Pospesel { BYD_CMD_SET_LEFT_EDGE_REGION, 0x00 }, 3812d5f5611SRichard Pospesel { BYD_CMD_SET_TOP_EDGE_REGION, 0x00 }, 3822d5f5611SRichard Pospesel { BYD_CMD_SET_RIGHT_EDGE_REGION, 0x00 }, 3832d5f5611SRichard Pospesel { BYD_CMD_SET_BOTTOM_EDGE_REGION, 0x00 }, 3842d5f5611SRichard Pospesel { BYD_CMD_SET_ABSOLUTE_MODE, 0x02 }, 3852d5f5611SRichard Pospesel /* Finalize initialization. */ 3862d5f5611SRichard Pospesel { 0x10E0, 0x00 }, 3872d5f5611SRichard Pospesel { 0x10E2, 0x01 }, 38898ee3771SChris Diamand }; 38998ee3771SChris Diamand 39098ee3771SChris Diamand for (i = 0; i < ARRAY_SIZE(seq); ++i) { 3912d5f5611SRichard Pospesel memset(param, 0, sizeof(param)); 39298ee3771SChris Diamand param[0] = seq[i].arg; 39398ee3771SChris Diamand if (ps2_command(ps2dev, param, seq[i].command)) 3942d5f5611SRichard Pospesel return -EIO; 39598ee3771SChris Diamand } 39698ee3771SChris Diamand 3972d5f5611SRichard Pospesel psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 39898ee3771SChris Diamand return 0; 39998ee3771SChris Diamand } 40098ee3771SChris Diamand 40198ee3771SChris Diamand static int byd_reconnect(struct psmouse *psmouse) 40298ee3771SChris Diamand { 40398ee3771SChris Diamand int retry = 0, error = 0; 40498ee3771SChris Diamand 40598ee3771SChris Diamand psmouse_dbg(psmouse, "Reconnect\n"); 40698ee3771SChris Diamand do { 40798ee3771SChris Diamand psmouse_reset(psmouse); 40898ee3771SChris Diamand if (retry) 40998ee3771SChris Diamand ssleep(1); 41098ee3771SChris Diamand error = byd_detect(psmouse, 0); 41198ee3771SChris Diamand } while (error && ++retry < 3); 41298ee3771SChris Diamand 41398ee3771SChris Diamand if (error) 41498ee3771SChris Diamand return error; 41598ee3771SChris Diamand 41698ee3771SChris Diamand psmouse_dbg(psmouse, "Reconnected after %d attempts\n", retry); 41798ee3771SChris Diamand 41898ee3771SChris Diamand error = byd_reset_touchpad(psmouse); 41998ee3771SChris Diamand if (error) { 42098ee3771SChris Diamand psmouse_err(psmouse, "Unable to initialize device\n"); 42198ee3771SChris Diamand return error; 42298ee3771SChris Diamand } 42398ee3771SChris Diamand 42498ee3771SChris Diamand return 0; 42598ee3771SChris Diamand } 42698ee3771SChris Diamand 4272d5f5611SRichard Pospesel static void byd_disconnect(struct psmouse *psmouse) 4282d5f5611SRichard Pospesel { 4292d5f5611SRichard Pospesel struct byd_data *priv = psmouse->private; 4302d5f5611SRichard Pospesel 4312d5f5611SRichard Pospesel if (priv) { 4322d5f5611SRichard Pospesel del_timer(&priv->timer); 4332d5f5611SRichard Pospesel kfree(psmouse->private); 4342d5f5611SRichard Pospesel psmouse->private = NULL; 4352d5f5611SRichard Pospesel } 4362d5f5611SRichard Pospesel } 4372d5f5611SRichard Pospesel 4382d5f5611SRichard Pospesel int byd_detect(struct psmouse *psmouse, bool set_properties) 4392d5f5611SRichard Pospesel { 4402d5f5611SRichard Pospesel struct ps2dev *ps2dev = &psmouse->ps2dev; 4412d5f5611SRichard Pospesel u8 param[4] = {0x03, 0x00, 0x00, 0x00}; 4422d5f5611SRichard Pospesel 4432d5f5611SRichard Pospesel if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) 4442d5f5611SRichard Pospesel return -1; 4452d5f5611SRichard Pospesel if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) 4462d5f5611SRichard Pospesel return -1; 4472d5f5611SRichard Pospesel if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) 4482d5f5611SRichard Pospesel return -1; 4492d5f5611SRichard Pospesel if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) 4502d5f5611SRichard Pospesel return -1; 4512d5f5611SRichard Pospesel if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 4522d5f5611SRichard Pospesel return -1; 4532d5f5611SRichard Pospesel 4542d5f5611SRichard Pospesel if (param[1] != 0x03 || param[2] != 0x64) 4552d5f5611SRichard Pospesel return -ENODEV; 4562d5f5611SRichard Pospesel 4572d5f5611SRichard Pospesel psmouse_dbg(psmouse, "BYD touchpad detected\n"); 4582d5f5611SRichard Pospesel 4592d5f5611SRichard Pospesel if (set_properties) { 4602d5f5611SRichard Pospesel psmouse->vendor = "BYD"; 4612d5f5611SRichard Pospesel psmouse->name = "TouchPad"; 4622d5f5611SRichard Pospesel } 4632d5f5611SRichard Pospesel 4642d5f5611SRichard Pospesel return 0; 4652d5f5611SRichard Pospesel } 4662d5f5611SRichard Pospesel 46798ee3771SChris Diamand int byd_init(struct psmouse *psmouse) 46898ee3771SChris Diamand { 46998ee3771SChris Diamand struct input_dev *dev = psmouse->dev; 4702d5f5611SRichard Pospesel struct byd_data *priv; 47198ee3771SChris Diamand 47298ee3771SChris Diamand if (psmouse_reset(psmouse)) 47398ee3771SChris Diamand return -EIO; 47498ee3771SChris Diamand 47598ee3771SChris Diamand if (byd_reset_touchpad(psmouse)) 47698ee3771SChris Diamand return -EIO; 47798ee3771SChris Diamand 4782d5f5611SRichard Pospesel priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4792d5f5611SRichard Pospesel if (!priv) 4802d5f5611SRichard Pospesel return -ENOMEM; 4812d5f5611SRichard Pospesel 482ce23cbc8SKees Cook priv->psmouse = psmouse; 483ce23cbc8SKees Cook timer_setup(&priv->timer, byd_clear_touch, 0); 4842d5f5611SRichard Pospesel 4852d5f5611SRichard Pospesel psmouse->private = priv; 4862d5f5611SRichard Pospesel psmouse->disconnect = byd_disconnect; 48798ee3771SChris Diamand psmouse->reconnect = byd_reconnect; 48898ee3771SChris Diamand psmouse->protocol_handler = byd_process_byte; 48998ee3771SChris Diamand psmouse->pktsize = 4; 49098ee3771SChris Diamand psmouse->resync_time = 0; 49198ee3771SChris Diamand 4922d5f5611SRichard Pospesel __set_bit(INPUT_PROP_POINTER, dev->propbit); 4932d5f5611SRichard Pospesel /* Touchpad */ 4942d5f5611SRichard Pospesel __set_bit(BTN_TOUCH, dev->keybit); 4952d5f5611SRichard Pospesel __set_bit(BTN_TOOL_FINGER, dev->keybit); 4962d5f5611SRichard Pospesel /* Buttons */ 4972d5f5611SRichard Pospesel __set_bit(BTN_LEFT, dev->keybit); 4982d5f5611SRichard Pospesel __set_bit(BTN_RIGHT, dev->keybit); 4992d5f5611SRichard Pospesel __clear_bit(BTN_MIDDLE, dev->keybit); 5002d5f5611SRichard Pospesel 5012d5f5611SRichard Pospesel /* Absolute position */ 5022d5f5611SRichard Pospesel __set_bit(EV_ABS, dev->evbit); 5032d5f5611SRichard Pospesel input_set_abs_params(dev, ABS_X, 0, BYD_PAD_WIDTH, 0, 0); 5042d5f5611SRichard Pospesel input_set_abs_params(dev, ABS_Y, 0, BYD_PAD_HEIGHT, 0, 0); 5052d5f5611SRichard Pospesel input_abs_set_res(dev, ABS_X, BYD_PAD_RESOLUTION); 5062d5f5611SRichard Pospesel input_abs_set_res(dev, ABS_Y, BYD_PAD_RESOLUTION); 5072d5f5611SRichard Pospesel /* No relative support */ 5082d5f5611SRichard Pospesel __clear_bit(EV_REL, dev->evbit); 5092d5f5611SRichard Pospesel __clear_bit(REL_X, dev->relbit); 5102d5f5611SRichard Pospesel __clear_bit(REL_Y, dev->relbit); 51198ee3771SChris Diamand 51298ee3771SChris Diamand return 0; 51398ee3771SChris Diamand } 514