| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Arjan Opmeer | 2621 | 26.34% | 4 | 4.65% |
| JJ Ding | 2526 | 25.39% | 14 | 16.28% |
| Benjamin Tissoires | 2153 | 21.64% | 13 | 15.12% |
| Ulrik De Bie | 719 | 7.23% | 8 | 9.30% |
| Jingle Wu | 505 | 5.08% | 1 | 1.16% |
| Éric Piel | 380 | 3.82% | 4 | 4.65% |
| Dmitry Torokhov | 270 | 2.71% | 10 | 11.63% |
| Hans de Goede | 207 | 2.08% | 8 | 9.30% |
| Matteo Delfino | 146 | 1.47% | 2 | 2.33% |
| Kai-Heng Feng | 82 | 0.82% | 1 | 1.16% |
| Duson Lin | 72 | 0.72% | 1 | 1.16% |
| Matti Kurkela | 66 | 0.66% | 2 | 2.33% |
| Phoenix Huang | 55 | 0.55% | 1 | 1.16% |
| Peter Hutterer | 45 | 0.45% | 1 | 1.16% |
| Heikki Krogerus | 28 | 0.28% | 1 | 1.16% |
| Thorsten Leemhuis | 19 | 0.19% | 1 | 1.16% |
| Florian Ragwitz | 11 | 0.11% | 1 | 1.16% |
| Rainer Koenig | 11 | 0.11% | 1 | 1.16% |
| KT Liao | 9 | 0.09% | 2 | 2.33% |
| Takashi Iwai | 6 | 0.06% | 1 | 1.16% |
| Gustavo A. R. Silva | 4 | 0.04% | 1 | 1.16% |
| Henrik Rydberg | 3 | 0.03% | 1 | 1.16% |
| Tejun Heo | 3 | 0.03% | 1 | 1.16% |
| Andrea Righi | 2 | 0.02% | 1 | 1.16% |
| Thomas Gleixner | 2 | 0.02% | 1 | 1.16% |
| Colin Ian King | 2 | 0.02% | 1 | 1.16% |
| Pali Rohár | 1 | 0.01% | 1 | 1.16% |
| Lee Jones | 1 | 0.01% | 1 | 1.16% |
| Arvind Yadav | 1 | 0.01% | 1 | 1.16% |
| Total | 9950 | 86 |
// SPDX-License-Identifier: GPL-2.0-only /* * Elantech Touchpad driver (v6) * * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> * * Trademarks are the property of their respective owners. */ #include <linux/delay.h> #include <linux/dmi.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/platform_device.h> #include <linux/serio.h> #include <linux/libps2.h> #include <asm/unaligned.h> #include "psmouse.h" #include "elantech.h" #include "elan_i2c.h" #define elantech_debug(fmt, ...) \ do { \ if (etd->info.debug) \ psmouse_printk(KERN_DEBUG, psmouse, \ fmt, ##__VA_ARGS__); \ } while (0) /* * Send a Synaptics style sliced query command */ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { if (ps2_sliced_command(&psmouse->ps2dev, c) || ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); return -1; } return 0; } /* * V3 and later support this fast command */ static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { struct ps2dev *ps2dev = &psmouse->ps2dev; if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) || ps2_command(ps2dev, NULL, c) || ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); return -1; } return 0; } /* * A retrying version of ps2_command */ static int elantech_ps2_command(struct psmouse *psmouse, unsigned char *param, int command) { struct ps2dev *ps2dev = &psmouse->ps2dev; struct elantech_data *etd = psmouse->private; int rc; int tries = ETP_PS2_COMMAND_TRIES; do { rc = ps2_command(ps2dev, param, command); if (rc == 0) break; tries--; elantech_debug("retrying ps2 command 0x%02x (%d).\n", command, tries); msleep(ETP_PS2_COMMAND_DELAY); } while (tries > 0); if (rc) psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command); return rc; } /* * Send an Elantech style special command to read 3 bytes from a register */ static int elantech_read_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "failed to read register %#02x\n", reg); return -EIO; } return 0; } /* * Send an Elantech style special command to write a register with a parameter */ static int elantech_write_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, param[0]) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, param[1]) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { psmouse_err(psmouse, "failed to write register %#02x with value %#02x%#02x\n", reg, param[0], param[1]); return -EIO; } return 0; } /* * Send an Elantech style special command to read a value from a register */ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, unsigned char *val) { struct elantech_data *etd = psmouse->private; unsigned char param[3]; int rc = 0; if (reg < 0x07 || reg > 0x26) return -1; if (reg > 0x11 && reg < 0x20) return -1; switch (etd->info.hw_version) { case 1: if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_READ) || ps2_sliced_command(&psmouse->ps2dev, reg) || ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; case 2: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; case 3 ... 4: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; } if (rc) psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg); else if (etd->info.hw_version != 4) *val = param[0]; else *val = param[1]; return rc; } /* * Send an Elantech style special command to write a register with a value */ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, unsigned char val) { struct elantech_data *etd = psmouse->private; int rc = 0; if (reg < 0x07 || reg > 0x26) return -1; if (reg > 0x11 && reg < 0x20) return -1; switch (etd->info.hw_version) { case 1: if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_WRITE) || ps2_sliced_command(&psmouse->ps2dev, reg) || ps2_sliced_command(&psmouse->ps2dev, val) || ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 2: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 3: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 4: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; } if (rc) psmouse_err(psmouse, "failed to write register 0x%02x with value 0x%02x.\n", reg, val); return rc; } /* * Dump a complete mouse movement packet to the syslog */ static void elantech_packet_dump(struct psmouse *psmouse) { psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n", psmouse->pktsize, psmouse->packet); } /* * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in * fw_version for this is based on the following fw_version & caps table: * * Laptop-model: fw_version: caps: buttons: * Acer S3 0x461f00 10, 13, 0e clickpad * Acer S7-392 0x581f01 50, 17, 0d clickpad * Acer V5-131 0x461f02 01, 16, 0c clickpad * Acer V5-551 0x461f00 ? clickpad * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons * Asus TP500LN 0x381f17 10, 14, 0e clickpad * Asus X750JN 0x381f17 10, 14, 0e clickpad * Asus UX31 0x361f00 20, 15, 0e clickpad * Asus UX32VD 0x361f02 00, 15, 0e clickpad * Avatar AVIU-145A2 0x361f00 ? clickpad * Fujitsu CELSIUS H760 0x570f02 40, 14, 0c 3 hw buttons (**) * Fujitsu CELSIUS H780 0x5d0f02 41, 16, 0d 3 hw buttons (**) * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**) * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad * Samsung NP900X3E-A02 0x575f03 ? clickpad * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons * Samsung RF710 0x450f00 ? 2 hw buttons * System76 Pangolin 0x250f01 ? 2 hw buttons * (*) + 3 trackpoint buttons * (**) + 0 trackpoint buttons * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps */ static inline int elantech_is_buttonpad(struct elantech_device_info *info) { return info->fw_version & 0x001000; } /* * Interpret complete data packets and report absolute mode input events for * hardware version 1. (4 byte packets) */ static void elantech_report_absolute_v1(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int fingers; if (etd->info.fw_version < 0x020000) { /* * byte 0: D U p1 p2 1 p3 R L * byte 1: f 0 th tw x9 x8 y9 y8 */ fingers = ((packet[1] & 0x80) >> 7) + ((packet[1] & 0x30) >> 4); } else { /* * byte 0: n1 n0 p2 p1 1 p3 R L * byte 1: 0 0 0 0 x9 x8 y9 y8 */ fingers = (packet[0] & 0xc0) >> 6; } if (etd->info.jumpy_cursor) { if (fingers != 1) { etd->single_finger_reports = 0; } else if (etd->single_finger_reports < 2) { /* Discard first 2 reports of one finger, bogus */ etd->single_finger_reports++; elantech_debug("discarding packet\n"); return; } } input_report_key(dev, BTN_TOUCH, fingers != 0); /* * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */ if (fingers) { input_report_abs(dev, ABS_X, ((packet[1] & 0x0c) << 6) | packet[2]); input_report_abs(dev, ABS_Y, etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); } input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); psmouse_report_standard_buttons(dev, packet[0]); if (etd->info.fw_version < 0x020000 && (etd->info.capabilities[0] & ETP_CAP_HAS_ROCKER)) { /* rocker up */ input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); /* rocker down */ input_report_key(dev, BTN_BACK, packet[0] & 0x80); } input_sync(dev); } static void elantech_set_slot(struct input_dev *dev, int slot, bool active, unsigned int x, unsigned int y) { input_mt_slot(dev, slot); input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); if (active) { input_report_abs(dev, ABS_MT_POSITION_X, x); input_report_abs(dev, ABS_MT_POSITION_Y, y); } } /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ static void elantech_report_semi_mt_data(struct input_dev *dev, unsigned int num_fingers, unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2) { elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2); } /* * Interpret complete data packets and report absolute mode input events for * hardware version 2. (6 byte packets) */ static void elantech_report_absolute_v2(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; struct input_dev *dev = psmouse->dev; unsigned char *packet = psmouse->packet; unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; unsigned int width = 0, pres = 0; /* byte 0: n1 n0 . . . . R L */ fingers = (packet[0] & 0xc0) >> 6; switch (fingers) { case 3: /* * Same as one finger, except report of more than 3 fingers: * byte 3: n4 . w1 w0 . . . . */ if (packet[3] & 0x80) fingers = 4; fallthrough; case 1: /* * byte 1: . . . . x11 x10 x9 x8 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ x1 = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . y11 y10 y9 y8 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); break; case 2: /* * The coordinate of each finger is reported separately * with a lower resolution for two finger touches: * byte 0: . . ay8 ax8 . . . . * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */ x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ y1 = etd->y_max - ((((packet[0] & 0x20) << 3) | packet[2]) << 2); /* * byte 3: . . by8 bx8 . . . . * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */ x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ y2 = etd->y_max - ((((packet[3] & 0x20) << 3) | packet[5]) << 2); /* Unknown so just report sensible values */ pres = 127; width = 7; break; } input_report_key(dev, BTN_TOUCH, fingers != 0); if (fingers != 0) { input_report_abs(dev, ABS_X, x1); input_report_abs(dev, ABS_Y, y1); } elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); psmouse_report_standard_buttons(dev, packet[0]); if (etd->info.reports_pressure) { input_report_abs(dev, ABS_PRESSURE, pres); input_report_abs(dev, ABS_TOOL_WIDTH, width); } input_sync(dev); } static void elantech_report_trackpoint(struct psmouse *psmouse, int packet_type) { /* * byte 0: 0 0 sx sy 0 M R L * byte 1:~sx 0 0 0 0 0 0 0 * byte 2:~sy 0 0 0 0 0 0 0 * byte 3: 0 0 ~sy ~sx 0 1 1 0 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 * * x and y are written in two's complement spread * over 9 bits with sx/sy the relative top bit and * x7..x0 and y7..y0 the lower bits. * The sign of y is opposite to what the input driver * expects for a relative movement */ struct elantech_data *etd = psmouse->private; struct input_dev *tp_dev = etd->tp_dev; unsigned char *packet = psmouse->packet; int x, y; u32 t; t = get_unaligned_le32(&packet[0]); switch (t & ~7U) { case 0x06000030U: case 0x16008020U: case 0x26800010U: case 0x36808000U: /* * This firmware misreport coordinates for trackpoint * occasionally. Discard packets outside of [-127, 127] range * to prevent cursor jumps. */ if (packet[4] == 0x80 || packet[5] == 0x80 || packet[1] >> 7 == packet[4] >> 7 || packet[2] >> 7 == packet[5] >> 7) { elantech_debug("discarding packet [%6ph]\n", packet); break; } x = packet[4] - (int)((packet[1]^0x80) << 1); y = (int)((packet[2]^0x80) << 1) - packet[5]; psmouse_report_standard_buttons(tp_dev, packet[0]); input_report_rel(tp_dev, REL_X, x); input_report_rel(tp_dev, REL_Y, y); input_sync(tp_dev); break; default: /* Dump unexpected packet sequences if debug=1 (default) */ if (etd->info.debug == 1) elantech_packet_dump(psmouse); break; } } /* * Interpret complete data packets and report absolute mode input events for * hardware version 3. (12 byte packets for two fingers) */ static void elantech_report_absolute_v3(struct psmouse *psmouse, int packet_type) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; unsigned int width = 0, pres = 0; /* byte 0: n1 n0 . . . . R L */ fingers = (packet[0] & 0xc0) >> 6; switch (fingers) { case 3: case 1: /* * byte 1: . . . . x11 x10 x9 x8 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ x1 = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . y11 y10 y9 y8 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); break; case 2: if (packet_type == PACKET_V3_HEAD) { /* * byte 1: . . . . ax11 ax10 ax9 ax8 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */ etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . ay11 ay10 ay9 ay8 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ etd->mt[0].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); /* * wait for next packet */ return; } /* packet_type == PACKET_V3_TAIL */ x1 = etd->mt[0].x; y1 = etd->mt[0].y; x2 = ((packet[1] & 0x0f) << 8) | packet[2]; y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); break; } pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); input_report_key(dev, BTN_TOUCH, fingers != 0); if (fingers != 0) { input_report_abs(dev, ABS_X, x1); input_report_abs(dev, ABS_Y, y1); } elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); /* For clickpads map both buttons to BTN_LEFT */ if (elantech_is_buttonpad(&etd->info)) input_report_key(dev, BTN_LEFT, packet[0] & 0x03); else psmouse_report_standard_buttons(dev, packet[0]); input_report_abs(dev, ABS_PRESSURE, pres); input_report_abs(dev, ABS_TOOL_WIDTH, width); input_sync(dev); } static void elantech_input_sync_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; /* For clickpads map both buttons to BTN_LEFT */ if (elantech_is_buttonpad(&etd->info)) input_report_key(dev, BTN_LEFT, packet[0] & 0x03); else psmouse_report_standard_buttons(dev, packet[0]); input_mt_report_pointer_emulation(dev, true); input_sync(dev); } static void process_packet_status_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; unsigned char *packet = psmouse->packet; unsigned fingers; int i; /* notify finger state change */ fingers = packet[1] & 0x1f; for (i = 0; i < ETP_MAX_FINGERS; i++) { if ((fingers & (1 << i)) == 0) { input_mt_slot(dev, i); input_mt_report_slot_state(dev, MT_TOOL_FINGER, false); } } elantech_input_sync_v4(psmouse); } static void process_packet_head_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int id = ((packet[3] & 0xe0) >> 5) - 1; int pres, traces; if (id < 0) return; etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); traces = (packet[0] & 0xf0) >> 4; input_mt_slot(dev, id); input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); input_report_abs(dev, ABS_MT_PRESSURE, pres); input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width); /* report this for backwards compatibility */ input_report_abs(dev, ABS_TOOL_WIDTH, traces); elantech_input_sync_v4(psmouse); } static void process_packet_motion_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; int id, sid; id = ((packet[0] & 0xe0) >> 5) - 1; if (id < 0) return; sid = ((packet[3] & 0xe0) >> 5) - 1; weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; /* * Motion packets give us the delta of x, y values of specific fingers, * but in two's complement. Let the compiler do the conversion for us. * Also _enlarge_ the numbers to int, in case of overflow. */ delta_x1 = (signed char)packet[1]; delta_y1 = (signed char)packet[2]; delta_x2 = (signed char)packet[4]; delta_y2 = (signed char)packet[5]; etd->mt[id].x += delta_x1 * weight; etd->mt[id].y -= delta_y1 * weight; input_mt_slot(dev, id); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); if (sid >= 0) { etd->mt[sid].x += delta_x2 * weight; etd->mt[sid].y -= delta_y2 * weight; input_mt_slot(dev, sid); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y); } elantech_input_sync_v4(psmouse); } static void elantech_report_absolute_v4(struct psmouse *psmouse, int packet_type) { switch (packet_type) { case PACKET_V4_STATUS: process_packet_status_v4(psmouse); break; case PACKET_V4_HEAD: process_packet_head_v4(psmouse); break; case PACKET_V4_MOTION: process_packet_motion_v4(psmouse); break; case PACKET_UNKNOWN: default: /* impossible to get here */ break; } } static int elantech_packet_check_v1(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned char p1, p2, p3; /* Parity bits are placed differently */ if (etd->info.fw_version < 0x020000) { /* byte 0: D U p1 p2 1 p3 R L */ p1 = (packet[0] & 0x20) >> 5; p2 = (packet[0] & 0x10) >> 4; } else { /* byte 0: n1 n0 p2 p1 1 p3 R L */ p1 = (packet[0] & 0x10) >> 4; p2 = (packet[0] & 0x20) >> 5; } p3 = (packet[0] & 0x04) >> 2; return etd->parity[packet[1]] == p1 && etd->parity[packet[2]] == p2 && etd->parity[packet[3]] == p3; } static int elantech_debounce_check_v2(struct psmouse *psmouse) { /* * When we encounter packet that matches this exactly, it means the * hardware is in debounce status. Just ignore the whole packet. */ static const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff }; unsigned char *packet = psmouse->packet; return !memcmp(packet, debounce_packet, sizeof(debounce_packet)); } static int elantech_packet_check_v2(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; /* * V2 hardware has two flavors. Older ones that do not report pressure, * and newer ones that reports pressure and width. With newer ones, all * packets (1, 2, 3 finger touch) have the same constant bits. With * older ones, 1/3 finger touch packets and 2 finger touch packets * have different constant bits. * With all three cases, if the constant bits are not exactly what I * expected, I consider them invalid. */ if (etd->info.reports_pressure) return (packet[0] & 0x0c) == 0x04 && (packet[3] & 0x0f) == 0x02; if ((packet[0] & 0xc0) == 0x80) return (packet[0] & 0x0c) == 0x0c && (packet[3] & 0x0e) == 0x08; return (packet[0] & 0x3c) == 0x3c && (packet[1] & 0xf0) == 0x00 && (packet[3] & 0x3e) == 0x38 && (packet[4] & 0xf0) == 0x00; } /* * We check the constant bits to determine what packet type we get, * so packet checking is mandatory for v3 and later hardware. */ static int elantech_packet_check_v3(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; static const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff }; unsigned char *packet = psmouse->packet; /* * check debounce first, it has the same signature in byte 0 * and byte 3 as PACKET_V3_HEAD. */ if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) return PACKET_DEBOUNCE; /* * If the hardware flag 'crc_enabled' is set the packets have * different signatures. */ if (etd->info.crc_enabled) { if ((packet[3] & 0x09) == 0x08) return PACKET_V3_HEAD; if ((packet[3] & 0x09) == 0x09) return PACKET_V3_TAIL; } else { if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) return PACKET_V3_HEAD; if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) return PACKET_V3_TAIL; if ((packet[3] & 0x0f) == 0x06) return PACKET_TRACKPOINT; } return PACKET_UNKNOWN; } static int elantech_packet_check_v4(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned char packet_type = packet[3] & 0x03; unsigned int ic_version; bool sanity_check; if (etd->tp_dev && (packet[3] & 0x0f) == 0x06) return PACKET_TRACKPOINT; /* This represents the version of IC body. */ ic_version = (etd->info.fw_version & 0x0f0000) >> 16; /* * Sanity check based on the constant bits of a packet. * The constant bits change depending on the value of * the hardware flag 'crc_enabled' and the version of * the IC body, but are the same for every packet, * regardless of the type. */ if (etd->info.crc_enabled) sanity_check = ((packet[3] & 0x08) == 0x00); else if (ic_version == 7 && etd->info.samples[1] == 0x2A) sanity_check = ((packet[3] & 0x1c) == 0x10); else sanity_check = ((packet[0] & 0x08) == 0x00 && (packet[3] & 0x1c) == 0x10); if (!sanity_check) return PACKET_UNKNOWN; switch (packet_type) { case 0: return PACKET_V4_STATUS; case 1: return PACKET_V4_HEAD; case 2: return PACKET_V4_MOTION; } return PACKET_UNKNOWN; } /* * Process byte stream from mouse and handle complete packets */ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; int packet_type; if (psmouse->pktcnt < psmouse->pktsize) return PSMOUSE_GOOD_DATA; if (etd->info.debug > 1) elantech_packet_dump(psmouse); switch (etd->info.hw_version) { case 1: if (etd->info.paritycheck && !elantech_packet_check_v1(psmouse)) return PSMOUSE_BAD_DATA; elantech_report_absolute_v1(psmouse); break; case 2: /* ignore debounce */ if (elantech_debounce_check_v2(psmouse)) return PSMOUSE_FULL_PACKET; if (etd->info.paritycheck && !elantech_packet_check_v2(psmouse)) return PSMOUSE_BAD_DATA; elantech_report_absolute_v2(psmouse); break; case 3: packet_type = elantech_packet_check_v3(psmouse); switch (packet_type) { case PACKET_UNKNOWN: return PSMOUSE_BAD_DATA; case PACKET_DEBOUNCE: /* ignore debounce */ break; case PACKET_TRACKPOINT: elantech_report_trackpoint(psmouse, packet_type); break; default: elantech_report_absolute_v3(psmouse, packet_type); break; } break; case 4: packet_type = elantech_packet_check_v4(psmouse); switch (packet_type) { case PACKET_UNKNOWN: return PSMOUSE_BAD_DATA; case PACKET_TRACKPOINT: elantech_report_trackpoint(psmouse, packet_type); break; default: elantech_report_absolute_v4(psmouse, packet_type); break; } break; } return PSMOUSE_FULL_PACKET; } /* * This writes the reg_07 value again to the hardware at the end of every * set_rate call because the register loses its value. reg_07 allows setting * absolute mode on v4 hardware */ static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse, unsigned int rate) { struct elantech_data *etd = psmouse->private; etd->original_set_rate(psmouse, rate); if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) psmouse_err(psmouse, "restoring reg_07 failed\n"); } /* * Put the touchpad into absolute mode */ static int elantech_set_absolute_mode(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char val; int tries = ETP_READ_BACK_TRIES; int rc = 0; switch (etd->info.hw_version) { case 1: etd->reg_10 = 0x16; etd->reg_11 = 0x8f; if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || elantech_write_reg(psmouse, 0x11, etd->reg_11)) { rc = -1; } break; case 2: /* Windows driver values */ etd->reg_10 = 0x54; etd->reg_11 = 0x88; /* 0x8a */ etd->reg_21 = 0x60; /* 0x00 */ if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || elantech_write_reg(psmouse, 0x11, etd->reg_11) || elantech_write_reg(psmouse, 0x21, etd->reg_21)) { rc = -1; } break; case 3: if (etd->info.set_hw_resolution) etd->reg_10 = 0x0b; else etd->reg_10 = 0x01; if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) rc = -1; break; case 4: etd->reg_07 = 0x01; if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) rc = -1; goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ } if (rc == 0) { /* * Read back reg 0x10. For hardware version 1 we must make * sure the absolute mode bit is set. For hardware version 2 * the touchpad is probably initializing and not ready until * we read back the value we just wrote. */ do { rc = elantech_read_reg(psmouse, 0x10, &val); if (rc == 0) break; tries--; elantech_debug("retrying read (%d).\n", tries); msleep(ETP_READ_BACK_DELAY); } while (tries > 0); if (rc) { psmouse_err(psmouse, "failed to read back register 0x10.\n"); } else if (etd->info.hw_version == 1 && !(val & ETP_R10_ABSOLUTE_MODE)) { psmouse_err(psmouse, "touchpad refuses to switch to absolute mode.\n"); rc = -1; } } skip_readback_reg_10: if (rc) psmouse_err(psmouse, "failed to initialise registers.\n"); return rc; } /* * (value from firmware) * 10 + 790 = dpi * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) */ static unsigned int elantech_convert_res(unsigned int val) { return (val * 10 + 790) * 10 / 254; } static int elantech_get_resolution_v4(struct psmouse *psmouse, unsigned int *x_res, unsigned int *y_res, unsigned int *bus) { unsigned char param[3]; if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param)) return -1; *x_res = elantech_convert_res(param[1] & 0x0f); *y_res = elantech_convert_res((param[1] & 0xf0) >> 4); *bus = param[2]; return 0; } static void elantech_set_buttonpad_prop(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; if (elantech_is_buttonpad(&etd->info)) { __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); __clear_bit(BTN_RIGHT, dev->keybit); } } /* * Some hw_version 4 models do have a middle button */ static const struct dmi_system_id elantech_dmi_has_middle_button[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Fujitsu H730 has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), }, }, { /* Fujitsu H760 also has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), }, }, { /* Fujitsu H780 also has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H780"), }, }, #endif { } }; /* * Set the appropriate event bits for the input subsystem */ static int elantech_set_input_params(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; struct elantech_device_info *info = &etd->info; unsigned int x_min = info->x_min, y_min = info->y_min, x_max = info->x_max, y_max = info->y_max, width = info->width; __set_bit(INPUT_PROP_POINTER, dev->propbit); __set_bit(EV_KEY, dev->evbit); __set_bit(EV_ABS, dev->evbit); __clear_bit(EV_REL, dev->evbit); __set_bit(BTN_LEFT, dev->keybit); if (info->has_middle_button) __set_bit(BTN_MIDDLE, dev->keybit); __set_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); switch (info->hw_version) { case 1: /* Rocker button */ if (info->fw_version < 0x020000 && (info->capabilities[0] & ETP_CAP_HAS_ROCKER)) { __set_bit(BTN_FORWARD, dev->keybit); __set_bit(BTN_BACK, dev->keybit); } input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); break; case 2: __set_bit(BTN_TOOL_QUADTAP, dev->keybit); __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); fallthrough; case 3: if (info->hw_version == 3) elantech_set_buttonpad_prop(psmouse); input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); if (info->reports_pressure) { input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, ETP_WMAX_V2, 0, 0); } input_mt_init_slots(dev, 2, INPUT_MT_SEMI_MT); input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); break; case 4: elantech_set_buttonpad_prop(psmouse); __set_bit(BTN_TOOL_QUADTAP, dev->keybit); /* For X to recognize me as touchpad. */ input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); /* * range of pressure and width is the same as v2, * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. */ input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, ETP_WMAX_V2, 0, 0); /* Multitouch capable pad, up to 5 fingers. */ input_mt_init_slots(dev, ETP_MAX_FINGERS, 0); input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); /* * The firmware reports how many trace lines the finger spans, * convert to surface unit as Protocol-B requires. */ input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0, ETP_WMAX_V2 * width, 0, 0); break; } input_abs_set_res(dev, ABS_X, info->x_res); input_abs_set_res(dev, ABS_Y, info->y_res); if (info->hw_version > 1) { input_abs_set_res(dev, ABS_MT_POSITION_X, info->x_res); input_abs_set_res(dev, ABS_MT_POSITION_Y, info->y_res); } etd->y_max = y_max; etd->width = width; return 0; } struct elantech_attr_data { size_t field_offset; unsigned char reg; }; /* * Display a register value by reading a sysfs entry */ static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, char *buf) { struct elantech_data *etd = psmouse->private; struct elantech_attr_data *attr = data; unsigned char *reg = (unsigned char *) etd + attr->field_offset; int rc = 0; if (attr->reg) rc = elantech_read_reg(psmouse, attr->reg, reg); return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); } /* * Write a register value by writing a sysfs entry */ static ssize_t elantech_set_int_attr(struct psmouse *psmouse, void *data, const char *buf, size_t count) { struct elantech_data *etd = psmouse->private; struct elantech_attr_data *attr = data; unsigned char *reg = (unsigned char *) etd + attr->field_offset; unsigned char value; int err; err = kstrtou8(buf, 16, &value); if (err) return err; /* Do we need to preserve some bits for version 2 hardware too? */ if (etd->info.hw_version == 1) { if (attr->reg == 0x10) /* Force absolute mode always on */ value |= ETP_R10_ABSOLUTE_MODE; else if (attr->reg == 0x11) /* Force 4 byte mode always on */ value |= ETP_R11_4_BYTE_MODE; } if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) *reg = value; return count; } #define ELANTECH_INT_ATTR(_name, _register) \ static struct elantech_attr_data elantech_attr_##_name = { \ .field_offset = offsetof(struct elantech_data, _name), \ .reg = _register, \ }; \ PSMOUSE_DEFINE_ATTR(_name, 0644, \ &elantech_attr_##_name, \ elantech_show_int_attr, \ elantech_set_int_attr) #define ELANTECH_INFO_ATTR(_name) \ static struct elantech_attr_data elantech_attr_##_name = { \ .field_offset = offsetof(struct elantech_data, info) + \ offsetof(struct elantech_device_info, _name), \ .reg = 0, \ }; \ PSMOUSE_DEFINE_ATTR(_name, 0644, \ &elantech_attr_##_name, \ elantech_show_int_attr, \ elantech_set_int_attr) ELANTECH_INT_ATTR(reg_07, 0x07); ELANTECH_INT_ATTR(reg_10, 0x10); ELANTECH_INT_ATTR(reg_11, 0x11); ELANTECH_INT_ATTR(reg_20, 0x20); ELANTECH_INT_ATTR(reg_21, 0x21); ELANTECH_INT_ATTR(reg_22, 0x22); ELANTECH_INT_ATTR(reg_23, 0x23); ELANTECH_INT_ATTR(reg_24, 0x24); ELANTECH_INT_ATTR(reg_25, 0x25); ELANTECH_INT_ATTR(reg_26, 0x26); ELANTECH_INFO_ATTR(debug); ELANTECH_INFO_ATTR(paritycheck); ELANTECH_INFO_ATTR(crc_enabled); static struct attribute *elantech_attrs[] = { &psmouse_attr_reg_07.dattr.attr, &psmouse_attr_reg_10.dattr.attr, &psmouse_attr_reg_11.dattr.attr, &psmouse_attr_reg_20.dattr.attr, &psmouse_attr_reg_21.dattr.attr, &psmouse_attr_reg_22.dattr.attr, &psmouse_attr_reg_23.dattr.attr, &psmouse_attr_reg_24.dattr.attr, &psmouse_attr_reg_25.dattr.attr, &psmouse_attr_reg_26.dattr.attr, &psmouse_attr_debug.dattr.attr, &psmouse_attr_paritycheck.dattr.attr, &psmouse_attr_crc_enabled.dattr.attr, NULL }; static const struct attribute_group elantech_attr_group = { .attrs = elantech_attrs, }; static bool elantech_is_signature_valid(const unsigned char *param) { static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; int i; if (param[0] == 0) return false; if (param[1] == 0) return true; /* * Some hw_version >= 4 models have a revision higher then 20. Meaning * that param[2] may be 10 or 20, skip the rates check for these. */ if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f && param[2] < 40) return true; for (i = 0; i < ARRAY_SIZE(rates); i++) if (param[2] == rates[i]) return false; return true; } /* * Use magic knock to detect Elantech touchpad */ int elantech_detect(struct psmouse *psmouse, bool set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char param[3]; ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n"); return -1; } /* * Report this in case there are Elantech models that use a different * set of magic numbers */ if (param[0] != 0x3c || param[1] != 0x03 || (param[2] != 0xc8 && param[2] != 0x00)) { psmouse_dbg(psmouse, "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", param[0], param[1], param[2]); return -1; } /* * Query touchpad's firmware version and see if it reports known * value to avoid mis-detection. Logitech mice are known to respond * to Elantech magic knock and there might be more. */ if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { psmouse_dbg(psmouse, "failed to query firmware version.\n"); return -1; } psmouse_dbg(psmouse, "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", param[0], param[1], param[2]); if (!elantech_is_signature_valid(param)) { psmouse_dbg(psmouse, "Probably not a real Elantech touchpad. Aborting.\n"); return -1; } if (set_properties) { psmouse->vendor = "Elantech"; psmouse->name = "Touchpad"; } return 0; } /* * Clean up sysfs entries when disconnecting */ static void elantech_disconnect(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; /* * We might have left a breadcrumb when trying to * set up SMbus companion. */ psmouse_smbus_cleanup(psmouse); if (etd->tp_dev) input_unregister_device(etd->tp_dev); sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); kfree(psmouse->private); psmouse->private = NULL; } /* * Put the touchpad back into absolute mode when reconnecting */ static int elantech_reconnect(struct psmouse *psmouse) { psmouse_reset(psmouse); if (elantech_detect(psmouse, 0)) return -1; if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad back into absolute mode.\n"); return -1; } return 0; } /* * Some hw_version 4 models do not work with crc_disabled */ static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Fujitsu H730 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), }, }, { /* Fujitsu H760 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), }, }, { /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"), }, }, { /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E546"), }, }, { /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E547"), }, }, { /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554"), }, }, { /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E556"), }, }, { /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E557"), }, }, { /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"), }, }, #endif { } }; /* * Some hw_version 3 models go into error state when we try to set * bit 3 and/or bit 1 of r10. */ static const struct dmi_system_id no_hw_res_dmi_table[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Gigabyte U2442 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), DMI_MATCH(DMI_PRODUCT_NAME, "U2442"), }, }, #endif { } }; /* * Change Report id 0x5E to 0x5F. */ static int elantech_change_report_id(struct psmouse *psmouse) { /* * NOTE: the code is expecting to receive param[] as an array of 3 * items (see __ps2_command()), even if in this case only 2 are * actually needed. Make sure the array size is 3 to avoid potential * stack out-of-bound accesses. */ unsigned char param[3] = { 0x10, 0x03 }; if (elantech_write_reg_params(psmouse, 0x7, param) || elantech_read_reg_params(psmouse, 0x7, param) || param[0] != 0x10 || param[1] != 0x03) { psmouse_err(psmouse, "Unable to change report ID to 0x5f.\n"); return -EIO; } return 0; } /* * determine hardware version and set some properties according to it. */ static int elantech_set_properties(struct elantech_device_info *info) { /* This represents the version of IC body. */ info->ic_version = (info->fw_version & 0x0f0000) >> 16; /* Early version of Elan touchpads doesn't obey the rule. */ if (info->fw_version < 0x020030 || info->fw_version == 0x020600) info->hw_version = 1; else { switch (info->ic_version) { case 2: case 4: info->hw_version = 2; break; case 5: info->hw_version = 3; break; case 6 ... 15: info->hw_version = 4; break; default: return -1; } } /* Get information pattern for hw_version 4 */ info->pattern = 0x00; if (info->ic_version == 0x0f && (info->fw_version & 0xff) <= 0x02) info->pattern = info->fw_version & 0xff; /* decide which send_cmd we're gonna use early */ info->send_cmd = info->hw_version >= 3 ? elantech_send_cmd : synaptics_send_cmd; /* Turn on packet checking by default */ info->paritycheck = 1; /* * This firmware suffers from misreporting coordinates when * a touch action starts causing the mouse cursor or scrolled page * to jump. Enable a workaround. */ info->jumpy_cursor = (info->fw_version == 0x020022 || info->fw_version == 0x020600); if (info->hw_version > 1) { /* For now show extra debug information */ info->debug = 1; if (info->fw_version >= 0x020800) info->reports_pressure = true; } /* * The signatures of v3 and v4 packets change depending on the * value of this hardware flag. */ info->crc_enabled = (info->fw_version & 0x4000) == 0x4000 || dmi_check_system(elantech_dmi_force_crc_enabled); /* Enable real hardware resolution on hw_version 3 ? */ info->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table); return 0; } static int elantech_query_info(struct psmouse *psmouse, struct elantech_device_info *info) { unsigned char param[3]; unsigned char traces; unsigned char ic_body[3]; memset(info, 0, sizeof(*info)); /* * Do the version query again so we can store the result */ if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { psmouse_err(psmouse, "failed to query firmware version.\n"); return -EINVAL; } info->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; if (elantech_set_properties(info)) { psmouse_err(psmouse, "unknown hardware version, aborting...\n"); return -EINVAL; } psmouse_info(psmouse, "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", info->hw_version, param[0], param[1], param[2]); if (info->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, info->capabilities)) { psmouse_err(psmouse, "failed to query capabilities.\n"); return -EINVAL; } psmouse_info(psmouse, "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", info->capabilities[0], info->capabilities[1], info->capabilities[2]); if (info->hw_version != 1) { if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, info->samples)) { psmouse_err(psmouse, "failed to query sample data\n"); return -EINVAL; } psmouse_info(psmouse, "Elan sample query result %02x, %02x, %02x\n", info->samples[0], info->samples[1], info->samples[2]); } if (info->pattern > 0x00 && info->ic_version == 0xf) { if (info->send_cmd(psmouse, ETP_ICBODY_QUERY, ic_body)) { psmouse_err(psmouse, "failed to query ic body\n"); return -EINVAL; } info->ic_version = be16_to_cpup((__be16 *)ic_body); psmouse_info(psmouse, "Elan ic body: %#04x, current fw version: %#02x\n", info->ic_version, ic_body[2]); } info->product_id = be16_to_cpup((__be16 *)info->samples); if (info->pattern == 0x00) info->product_id &= 0xff; if (info->samples[1] == 0x74 && info->hw_version == 0x03) { /* * This module has a bug which makes absolute mode * unusable, so let's abort so we'll be using standard * PS/2 protocol. */ psmouse_info(psmouse, "absolute mode broken, forcing standard PS/2 protocol\n"); return -ENODEV; } /* The MSB indicates the presence of the trackpoint */ info->has_trackpoint = (info->capabilities[0] & 0x80) == 0x80; if (info->has_trackpoint && info->ic_version == 0x0011 && (info->product_id == 0x08 || info->product_id == 0x09 || info->product_id == 0x0d || info->product_id == 0x0e)) { /* * This module has a bug which makes trackpoint in SMBus * mode return invalid data unless trackpoint is switched * from using 0x5e reports to 0x5f. If we are not able to * make the switch, let's abort initialization so we'll be * using standard PS/2 protocol. */ if (elantech_change_report_id(psmouse)) { psmouse_info(psmouse, "Trackpoint report is broken, forcing standard PS/2 protocol\n"); return -ENODEV; } } info->x_res = 31; info->y_res = 31; if (info->hw_version == 4) { if (elantech_get_resolution_v4(psmouse, &info->x_res, &info->y_res, &info->bus)) { psmouse_warn(psmouse, "failed to query resolution data.\n"); } } /* query range information */ switch (info->hw_version) { case 1: info->x_min = ETP_XMIN_V1; info->y_min = ETP_YMIN_V1; info->x_max = ETP_XMAX_V1; info->y_max = ETP_YMAX_V1; break; case 2: if (info->fw_version == 0x020800 || info->fw_version == 0x020b00 || info->fw_version == 0x020030) { info->x_min = ETP_XMIN_V2; info->y_min = ETP_YMIN_V2; info->x_max = ETP_XMAX_V2; info->y_max = ETP_YMAX_V2; } else { int i; int fixed_dpi; i = (info->fw_version > 0x020800 && info->fw_version < 0x020900) ? 1 : 2; if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; fixed_dpi = param[1] & 0x10; if (((info->fw_version >> 16) == 0x14) && fixed_dpi) { if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) return -EINVAL; info->x_max = (info->capabilities[1] - i) * param[1] / 2; info->y_max = (info->capabilities[2] - i) * param[2] / 2; } else if (info->fw_version == 0x040216) { info->x_max = 819; info->y_max = 405; } else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) { info->x_max = 900; info->y_max = 500; } else { info->x_max = (info->capabilities[1] - i) * 64; info->y_max = (info->capabilities[2] - i) * 64; } } break; case 3: if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; info->x_max = (0x0f & param[0]) << 8 | param[1]; info->y_max = (0xf0 & param[0]) << 4 | param[2]; break; case 4: if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; info->x_max = (0x0f & param[0]) << 8 | param[1]; info->y_max = (0xf0 & param[0]) << 4 | param[2]; traces = info->capabilities[1]; if ((traces < 2) || (traces > info->x_max)) return -EINVAL; info->width = info->x_max / (traces - 1); /* column number of traces */ info->x_traces = traces; /* row number of traces */ traces = info->capabilities[2]; if ((traces >= 2) && (traces <= info->y_max)) info->y_traces = traces; break; } /* check for the middle button: DMI matching or new v4 firmwares */ info->has_middle_button = dmi_check_system(elantech_dmi_has_middle_button) || (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) && !elantech_is_buttonpad(info)); return 0; } #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) /* * The newest Elantech device can use a secondary bus (over SMBus) which * provides a better bandwidth and allow a better control of the touchpads. * This is used to decide if we need to use this bus or not. */ enum { ELANTECH_SMBUS_NOT_SET = -1, ELANTECH_SMBUS_OFF, ELANTECH_SMBUS_ON, }; static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ? ELANTECH_SMBUS_NOT_SET : ELANTECH_SMBUS_OFF; module_param_named(elantech_smbus, elantech_smbus, int, 0644); MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device."); static const char * const i2c_blacklist_pnp_ids[] = { /* * These are known to not be working properly as bits are missing * in elan_i2c. */ NULL }; static int elantech_create_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { struct property_entry i2c_props[11] = {}; struct i2c_board_info smbus_board = { I2C_BOARD_INFO("elan_i2c", 0x15), .flags = I2C_CLIENT_HOST_NOTIFY, }; unsigned int idx = 0; i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-x", info->x_max + 1); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-y", info->y_max + 1); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-x", info->x_min); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-y", info->y_min); if (info->x_res) i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-x-mm", (info->x_max + 1) / info->x_res); if (info->y_res) i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-y-mm", (info->y_max + 1) / info->y_res); if (info->has_trackpoint) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,trackpoint"); if (info->has_middle_button) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,middle-button"); if (info->x_traces) i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,x_traces", info->x_traces); if (info->y_traces) i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,y_traces", info->y_traces); if (elantech_is_buttonpad(info)) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,clickpad"); smbus_board.fwnode = fwnode_create_software_node(i2c_props, NULL); if (IS_ERR(smbus_board.fwnode)) return PTR_ERR(smbus_board.fwnode); return psmouse_smbus_init(psmouse, &smbus_board, NULL, 0, false, leave_breadcrumbs); } /* * elantech_setup_smbus - called once the PS/2 devices are enumerated * and decides to instantiate a SMBus InterTouch device. */ static int elantech_setup_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { int error; if (elantech_smbus == ELANTECH_SMBUS_OFF) return -ENXIO; if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) { /* * New ICs are enabled by default, unless mentioned in * i2c_blacklist_pnp_ids. * Old ICs are up to the user to decide. */ if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) || psmouse_matches_pnp_id(psmouse, i2c_blacklist_pnp_ids)) return -ENXIO; } psmouse_info(psmouse, "Trying to set up SMBus access\n"); error = elantech_create_smbus(psmouse, info, leave_breadcrumbs); if (error) { if (error == -EAGAIN) psmouse_info(psmouse, "SMbus companion is not ready yet\n"); else psmouse_err(psmouse, "unable to create intertouch device\n"); return error; } return 0; } static bool elantech_use_host_notify(struct psmouse *psmouse, struct elantech_device_info *info) { if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) return true; switch (info->bus) { case ETP_BUS_PS2_ONLY: /* expected case */ break; case ETP_BUS_SMB_ALERT_ONLY: case ETP_BUS_PS2_SMB_ALERT: psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n"); break; case ETP_BUS_SMB_HST_NTFY_ONLY: case ETP_BUS_PS2_SMB_HST_NTFY: return true; default: psmouse_dbg(psmouse, "Ignoring SMBus bus provider %d.\n", info->bus); } return false; } int elantech_init_smbus(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; if (info.hw_version < 4) { error = -ENXIO; goto init_fail; } return elantech_create_smbus(psmouse, &info, false); init_fail: psmouse_reset(psmouse); return error; } #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ /* * Initialize the touchpad and create sysfs entries */ static int elantech_setup_ps2(struct psmouse *psmouse, struct elantech_device_info *info) { struct elantech_data *etd; int i; int error = -EINVAL; struct input_dev *tp_dev; psmouse->private = etd = kzalloc(sizeof(*etd), GFP_KERNEL); if (!etd) return -ENOMEM; etd->info = *info; etd->parity[0] = 1; for (i = 1; i < 256; i++) etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); goto init_fail; } if (info->fw_version == 0x381f17) { etd->original_set_rate = psmouse->set_rate; psmouse->set_rate = elantech_set_rate_restore_reg_07; } if (elantech_set_input_params(psmouse)) { psmouse_err(psmouse, "failed to query touchpad range.\n"); goto init_fail; } error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); if (error) { psmouse_err(psmouse, "failed to create sysfs attributes, error: %d.\n", error); goto init_fail; } if (info->has_trackpoint) { tp_dev = input_allocate_device(); if (!tp_dev) { error = -ENOMEM; goto init_fail_tp_alloc; } etd->tp_dev = tp_dev; snprintf(etd->tp_phys, sizeof(etd->tp_phys), "%s/input1", psmouse->ps2dev.serio->phys); tp_dev->phys = etd->tp_phys; tp_dev->name = "ETPS/2 Elantech TrackPoint"; tp_dev->id.bustype = BUS_I8042; tp_dev->id.vendor = 0x0002; tp_dev->id.product = PSMOUSE_ELANTECH; tp_dev->id.version = 0x0000; tp_dev->dev.parent = &psmouse->ps2dev.serio->dev; tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); tp_dev->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); tp_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); __set_bit(INPUT_PROP_POINTER, tp_dev->propbit); __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit); error = input_register_device(etd->tp_dev); if (error < 0) goto init_fail_tp_reg; } psmouse->protocol_handler = elantech_process_byte; psmouse->disconnect = elantech_disconnect; psmouse->reconnect = elantech_reconnect; psmouse->pktsize = info->hw_version > 1 ? 6 : 4; return 0; init_fail_tp_reg: input_free_device(tp_dev); init_fail_tp_alloc: sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); init_fail: kfree(etd); return error; } int elantech_init_ps2(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; error = elantech_setup_ps2(psmouse, &info); if (error) goto init_fail; return 0; init_fail: psmouse_reset(psmouse); return error; } int elantech_init(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) if (elantech_use_host_notify(psmouse, &info)) { if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) || !IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)) { psmouse_warn(psmouse, "The touchpad can support a better bus than the too old PS/2 protocol. " "Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n"); } error = elantech_setup_smbus(psmouse, &info, true); if (!error) return PSMOUSE_ELANTECH_SMBUS; } #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ error = elantech_setup_ps2(psmouse, &info); if (error < 0) { /* * Not using any flavor of Elantech support, so clean up * SMbus breadcrumbs, if any. */ psmouse_smbus_cleanup(psmouse); goto init_fail; } return PSMOUSE_ELANTECH; init_fail: psmouse_reset(psmouse); return error; }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1