diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/mouse/elantech.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/mouse/elantech.c | 1394 |
1 files changed, 0 insertions, 1394 deletions
diff --git a/ANDROID_3.4.5/drivers/input/mouse/elantech.c b/ANDROID_3.4.5/drivers/input/mouse/elantech.c deleted file mode 100644 index 47901100..00000000 --- a/ANDROID_3.4.5/drivers/input/mouse/elantech.c +++ /dev/null @@ -1,1394 +0,0 @@ -/* - * Elantech Touchpad driver (v6) - * - * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - * Trademarks are the property of their respective owners. - */ - -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/input.h> -#include <linux/input/mt.h> -#include <linux/serio.h> -#include <linux/libps2.h> -#include "psmouse.h" -#include "elantech.h" - -#define elantech_debug(fmt, ...) \ - do { \ - if (etd->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 (psmouse_sliced_command(psmouse, 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 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->hw_version) { - case 1: - if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) || - psmouse_sliced_command(psmouse, 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->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->hw_version) { - case 1: - if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) || - psmouse_sliced_command(psmouse, reg) || - psmouse_sliced_command(psmouse, 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) -{ - int i; - - psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet ["); - for (i = 0; i < psmouse->pktsize; i++) - printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]); - printk("]\n"); -} - -/* - * 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->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->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); - input_report_key(dev, BTN_LEFT, packet[0] & 0x01); - input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); - - if (etd->fw_version < 0x020000 && - (etd->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; - /* pass through... */ - 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); - input_report_key(dev, BTN_LEFT, packet[0] & 0x01); - input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); - if (etd->reports_pressure) { - input_report_abs(dev, ABS_PRESSURE, pres); - input_report_abs(dev, ABS_TOOL_WIDTH, width); - } - - input_sync(dev); -} - -/* - * 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); - input_report_key(dev, BTN_LEFT, packet[0] & 0x01); - input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); - 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; - unsigned char *packet = psmouse->packet; - - input_report_key(dev, BTN_LEFT, packet[0] & 0x01); - 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->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. - */ - 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->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) -{ - 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 ((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; - - return PACKET_UNKNOWN; -} - -static int elantech_packet_check_v4(struct psmouse *psmouse) -{ - unsigned char *packet = psmouse->packet; - - if ((packet[0] & 0x0c) == 0x04 && - (packet[3] & 0x1f) == 0x11) - return PACKET_V4_HEAD; - - if ((packet[0] & 0x0c) == 0x04 && - (packet[3] & 0x1f) == 0x12) - return PACKET_V4_MOTION; - - if ((packet[0] & 0x0c) == 0x04 && - (packet[3] & 0x1f) == 0x10) - return PACKET_V4_STATUS; - - 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->debug > 1) - elantech_packet_dump(psmouse); - - switch (etd->hw_version) { - case 1: - if (etd->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->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); - /* ignore debounce */ - if (packet_type == PACKET_DEBOUNCE) - return PSMOUSE_FULL_PACKET; - - if (packet_type == PACKET_UNKNOWN) - return PSMOUSE_BAD_DATA; - - elantech_report_absolute_v3(psmouse, packet_type); - break; - - case 4: - packet_type = elantech_packet_check_v4(psmouse); - if (packet_type == PACKET_UNKNOWN) - return PSMOUSE_BAD_DATA; - - elantech_report_absolute_v4(psmouse, packet_type); - break; - } - - return PSMOUSE_FULL_PACKET; -} - -/* - * 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->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: - etd->reg_10 = 0x0b; - 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->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; -} - -static int elantech_set_range(struct psmouse *psmouse, - unsigned int *x_min, unsigned int *y_min, - unsigned int *x_max, unsigned int *y_max, - unsigned int *width) -{ - struct elantech_data *etd = psmouse->private; - unsigned char param[3]; - unsigned char traces; - - switch (etd->hw_version) { - case 1: - *x_min = ETP_XMIN_V1; - *y_min = ETP_YMIN_V1; - *x_max = ETP_XMAX_V1; - *y_max = ETP_YMAX_V1; - break; - - case 2: - if (etd->fw_version == 0x020800 || - etd->fw_version == 0x020b00 || - etd->fw_version == 0x020030) { - *x_min = ETP_XMIN_V2; - *y_min = ETP_YMIN_V2; - *x_max = ETP_XMAX_V2; - *y_max = ETP_YMAX_V2; - } else { - int i; - int fixed_dpi; - - i = (etd->fw_version > 0x020800 && - etd->fw_version < 0x020900) ? 1 : 2; - - if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) - return -1; - - fixed_dpi = param[1] & 0x10; - - if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) { - if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) - return -1; - - *x_max = (etd->capabilities[1] - i) * param[1] / 2; - *y_max = (etd->capabilities[2] - i) * param[2] / 2; - } else if (etd->fw_version == 0x040216) { - *x_max = 819; - *y_max = 405; - } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) { - *x_max = 900; - *y_max = 500; - } else { - *x_max = (etd->capabilities[1] - i) * 64; - *y_max = (etd->capabilities[2] - i) * 64; - } - } - break; - - case 3: - if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) - return -1; - - *x_max = (0x0f & param[0]) << 8 | param[1]; - *y_max = (0xf0 & param[0]) << 4 | param[2]; - break; - - case 4: - if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) - return -1; - - *x_max = (0x0f & param[0]) << 8 | param[1]; - *y_max = (0xf0 & param[0]) << 4 | param[2]; - traces = etd->capabilities[1]; - if ((traces < 2) || (traces > *x_max)) - return -1; - - *width = *x_max / (traces - 1); - break; - } - - return 0; -} - -/* - * (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 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); - - return 0; -} - -/* - * 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; - unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0; - unsigned int x_res = 0, y_res = 0; - - if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width)) - return -1; - - __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); - __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 (etd->hw_version) { - case 1: - /* Rocker button */ - if (etd->fw_version < 0x020000 && - (etd->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); - /* fall through */ - case 3: - 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 (etd->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_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: - if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) { - /* - * if query failed, print a warning and leave the values - * zero to resemble synaptics.c behavior. - */ - psmouse_warn(psmouse, "couldn't query resolution data.\n"); - } - /* v4 is clickpad, with only one button. */ - __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); - __clear_bit(BTN_RIGHT, dev->keybit); - __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); - input_abs_set_res(dev, ABS_X, x_res); - input_abs_set_res(dev, ABS_Y, y_res); - /* - * 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); - 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_abs_set_res(dev, ABS_MT_POSITION_X, x_res); - input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res); - 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; - } - - 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->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, S_IWUSR | S_IRUGO, \ - &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_INT_ATTR(debug, 0); -ELANTECH_INT_ATTR(paritycheck, 0); - -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, - NULL -}; - -static 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; - - 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(&psmouse->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) -{ - 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; -} - -/* - * determine hardware version and set some properties according to it. - */ -static int elantech_set_properties(struct elantech_data *etd) -{ - /* This represents the version of IC body. */ - int ver = (etd->fw_version & 0x0f0000) >> 16; - - /* Early version of Elan touchpads doesn't obey the rule. */ - if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600) - etd->hw_version = 1; - else { - switch (ver) { - case 2: - case 4: - etd->hw_version = 2; - break; - case 5: - etd->hw_version = 3; - break; - case 6: - etd->hw_version = 4; - break; - default: - return -1; - } - } - - /* decide which send_cmd we're gonna use early */ - etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd : - synaptics_send_cmd; - - /* Turn on packet checking by default */ - etd->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. - */ - etd->jumpy_cursor = - (etd->fw_version == 0x020022 || etd->fw_version == 0x020600); - - if (etd->hw_version > 1) { - /* For now show extra debug information */ - etd->debug = 1; - - if (etd->fw_version >= 0x020800) - etd->reports_pressure = true; - } - - return 0; -} - -/* - * Initialize the touchpad and create sysfs entries - */ -int elantech_init(struct psmouse *psmouse) -{ - struct elantech_data *etd; - int i, error; - unsigned char param[3]; - - psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL); - if (!etd) - return -ENOMEM; - - psmouse_reset(psmouse); - - etd->parity[0] = 1; - for (i = 1; i < 256; i++) - etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; - - /* - * 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"); - goto init_fail; - } - etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; - - if (elantech_set_properties(etd)) { - psmouse_err(psmouse, "unknown hardware version, aborting...\n"); - goto init_fail; - } - psmouse_info(psmouse, - "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", - etd->hw_version, param[0], param[1], param[2]); - - if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, - etd->capabilities)) { - psmouse_err(psmouse, "failed to query capabilities.\n"); - goto init_fail; - } - psmouse_info(psmouse, - "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", - etd->capabilities[0], etd->capabilities[1], - etd->capabilities[2]); - - if (elantech_set_absolute_mode(psmouse)) { - psmouse_err(psmouse, - "failed to put touchpad into absolute mode.\n"); - goto init_fail; - } - - 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; - } - - psmouse->protocol_handler = elantech_process_byte; - psmouse->disconnect = elantech_disconnect; - psmouse->reconnect = elantech_reconnect; - psmouse->pktsize = etd->hw_version > 1 ? 6 : 4; - - return 0; - - init_fail: - kfree(etd); - return -1; -} |