Stefan Lucke | 24bf10a | 2007-02-18 01:49:10 -0500 | [diff] [blame] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | * touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens |
| 3 | * |
| 4 | * Copyright (C) 2005 by Stefan Lucke |
| 5 | * Copyright (C) 2004 by Daniel Ritz |
| 6 | * Copyright (C) by Todd E. Johnson (mtouchusb.c) |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of the |
| 11 | * License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
| 22 | * Based upon touchkitusb.c |
| 23 | * |
| 24 | * Vendor documentation is available in support section of: |
| 25 | * http://www.egalax.com.tw/ |
| 26 | */ |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/slab.h> |
| 30 | |
| 31 | #include <linux/input.h> |
| 32 | #include <linux/serio.h> |
| 33 | #include <linux/libps2.h> |
| 34 | |
| 35 | #include "psmouse.h" |
| 36 | #include "touchkit_ps2.h" |
| 37 | |
| 38 | #define TOUCHKIT_MAX_XC 0x07ff |
| 39 | #define TOUCHKIT_MAX_YC 0x07ff |
| 40 | |
| 41 | #define TOUCHKIT_CMD 0x0a |
| 42 | #define TOUCHKIT_CMD_LENGTH 1 |
| 43 | |
| 44 | #define TOUCHKIT_CMD_ACTIVE 'A' |
| 45 | #define TOUCHKIT_CMD_FIRMWARE_VERSION 'D' |
| 46 | #define TOUCHKIT_CMD_CONTROLLER_TYPE 'E' |
| 47 | |
| 48 | #define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c)) |
| 49 | |
| 50 | #define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01) |
| 51 | #define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2]) |
| 52 | #define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4]) |
| 53 | |
| 54 | static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse) |
| 55 | { |
| 56 | unsigned char *packet = psmouse->packet; |
| 57 | struct input_dev *dev = psmouse->dev; |
| 58 | |
| 59 | if (psmouse->pktcnt != 5) |
| 60 | return PSMOUSE_GOOD_DATA; |
| 61 | |
| 62 | input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet)); |
| 63 | input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet)); |
| 64 | input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet)); |
| 65 | input_sync(dev); |
| 66 | |
| 67 | return PSMOUSE_FULL_PACKET; |
| 68 | } |
| 69 | |
Dmitry Torokhov | b7802c5 | 2009-09-09 19:13:20 -0700 | [diff] [blame] | 70 | int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties) |
Stefan Lucke | 24bf10a | 2007-02-18 01:49:10 -0500 | [diff] [blame] | 71 | { |
| 72 | struct input_dev *dev = psmouse->dev; |
| 73 | unsigned char param[3]; |
| 74 | int command; |
| 75 | |
| 76 | param[0] = TOUCHKIT_CMD_LENGTH; |
| 77 | param[1] = TOUCHKIT_CMD_ACTIVE; |
| 78 | command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD); |
| 79 | |
| 80 | if (ps2_command(&psmouse->ps2dev, param, command)) |
| 81 | return -ENODEV; |
| 82 | |
| 83 | if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 || |
| 84 | param[2] != TOUCHKIT_CMD_ACTIVE) |
| 85 | return -ENODEV; |
| 86 | |
| 87 | if (set_properties) { |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 88 | dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
Dmitry Torokhov | b7802c5 | 2009-09-09 19:13:20 -0700 | [diff] [blame] | 89 | __set_bit(BTN_TOUCH, dev->keybit); |
Stefan Lucke | 24bf10a | 2007-02-18 01:49:10 -0500 | [diff] [blame] | 90 | input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0); |
| 91 | input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0); |
| 92 | |
| 93 | psmouse->vendor = "eGalax"; |
| 94 | psmouse->name = "Touchscreen"; |
| 95 | psmouse->protocol_handler = touchkit_ps2_process_byte; |
| 96 | psmouse->pktsize = 5; |
| 97 | } |
| 98 | |
| 99 | return 0; |
| 100 | } |