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| 2 | |
| 3 | * touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens
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| 4 | *
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| 5 | * Copyright (C) 2005 by Stefan Lucke
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| 6 | * Copyright (C) 2004 by Daniel Ritz
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| 7 | * Copyright (C) by Todd E. Johnson (mtouchusb.c)
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| 8 | *
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| 9 | * Based upon touchkitusb.c
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| 10 | *
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| 11 | * Vendor documentation is available at:
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| 12 | * http://home.eeti.com.tw/web20/drivers/Software%20Programming%20Guide_v2.0.pdf
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| 13 |
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| 14 |
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| 15 | #include <linux/kernel.h>
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| 16 |
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| 17 | #include <linux/input.h>
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| 18 | #include <linux/serio.h>
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| 19 | #include <linux/libps2.h>
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| 20 |
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| 21 | #include "psmouse.h"
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| 22 | #include "touchkit_ps2.h"
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| 23 |
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| 24 | #define TOUCHKIT_MAX_XC 0x07ff
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| 25 | #define TOUCHKIT_MAX_YC 0x07ff
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| 26 |
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| 27 | #define TOUCHKIT_CMD 0x0a
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| 28 | #define TOUCHKIT_CMD_LENGTH 1
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| 29 |
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| 30 | #define TOUCHKIT_CMD_ACTIVE 'A'
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| 31 | #define TOUCHKIT_CMD_FIRMWARE_VERSION 'D'
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| 32 | #define TOUCHKIT_CMD_CONTROLLER_TYPE 'E'
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| 33 |
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| 34 | #define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c))
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| 35 |
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| 36 | #define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01)
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| 37 | #define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2])
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| 38 | #define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4])
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| 39 |
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| 40 | static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse)
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| 41 | {
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| 42 | unsigned char *packet = psmouse->packet;
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| 43 | struct input_dev *dev = psmouse->dev;
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| 44 |
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| 45 | if (psmouse->pktcnt != 5)
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| 46 | return PSMOUSE_GOOD_DATA;
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| 47 |
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| 48 | input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet));
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| 49 | input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet));
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| 50 | input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet));
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| 51 | input_sync(dev);
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| 52 |
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| 53 | return PSMOUSE_FULL_PACKET;
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| 54 | }
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| 55 |
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| 56 | int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties)
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| 57 | {
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| 58 | struct input_dev *dev = psmouse->dev;
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| 59 | unsigned char param[3];
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| 60 | int command;
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| 61 |
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| 62 | param[0] = TOUCHKIT_CMD_LENGTH;
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| 63 | param[1] = TOUCHKIT_CMD_ACTIVE;
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| 64 | command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD);
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| 65 |
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| 66 | if (ps2_command(&psmouse->ps2dev, param, command))
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| 67 | return -ENODEV;
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| 68 |
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| 69 | if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 ||
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| 70 | param[2] != TOUCHKIT_CMD_ACTIVE)
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| 71 | return -ENODEV;
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| 72 |
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| 73 | if (set_properties) {
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| 74 | dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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| 75 | dev->keybit[BIT_WORD(BTN_MOUSE)] = 0;
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| 76 | dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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| 77 | input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0);
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| 78 | input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0);
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| 79 |
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| 80 | psmouse->vendor = "eGalax";
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| 81 | psmouse->name = "Touchscreen";
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| 82 | psmouse->protocol_handler = touchkit_ps2_process_byte;
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| 83 | psmouse->pktsize = 5;
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| 84 | }
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| 85 |
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| 86 | return 0;
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| 87 | }
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