drivers/input/mouse/lifebook.c

   1 /*
   2  * Fujitsu B-series Lifebook PS/2 TouchScreen driver
   3  *
   4  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   5  * Copyright (c) 2005 Kenan Esau <kenan.esau@conan.de>
   6  *
   7  * TouchScreen detection, absolute mode setting and packet layout is taken from
   8  * Harald Hoyer's description of the device.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  */
  14
  15 #include <linux/input.h>
  16 #include <linux/serio.h>
  17 #include <linux/libps2.h>
  18 #include <linux/dmi.h>
  19
  20 #include "psmouse.h"
  21 #include "lifebook.h"
  22
  23 static struct dmi_system_id lifebook_dmi_table[] = {
  24        {
  25                .ident = "Lifebook B",
  26                .matches = {
  27                        DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
  28                },
  29        },
  30        {
  31                .ident = "Lifebook B142",
  32                .matches = {
  33                        DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
  34                },
  35
  36        },
  37        { }
  38 };
  39
  40
  41 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
  42 {
  43         unsigned char *packet = psmouse->packet;
  44         struct input_dev *dev = psmouse->dev;
  45
  46         if (psmouse->pktcnt != 3)
  47                 return PSMOUSE_GOOD_DATA;
  48
  49         input_regs(dev, regs);
  50
  51         /* calculate X and Y */
  52         if ((packet[0] & 0x08) == 0x00) {
  53                 input_report_abs(dev, ABS_X,
  54                                  (packet[1] | ((packet[0] & 0x30) << 4)));
  55                 input_report_abs(dev, ABS_Y,
  56                                  1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
  57         } else {
  58                 input_report_rel(dev, REL_X,
  59                                 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
  60                 input_report_rel(dev, REL_Y,
  61                                  -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
  62         }
  63
  64         input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
  65         input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
  66         input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
  67
  68         input_sync(dev);
  69
  70         return PSMOUSE_FULL_PACKET;
  71 }
  72
  73 static int lifebook_absolute_mode(struct psmouse *psmouse)
  74 {
  75         struct ps2dev *ps2dev = &psmouse->ps2dev;
  76         unsigned char param;
  77
  78         if (psmouse_reset(psmouse))
  79                 return -1;
  80
  81         /*
  82            Enable absolute output -- ps2_command fails always but if
  83            you leave this call out the touchsreen will never send
  84            absolute coordinates
  85         */
  86         param = 0x07;
  87         ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
  88
  89         return 0;
  90 }
  91
  92 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
  93 {
  94         unsigned char params[] = { 0, 1, 2, 2, 3 };
  95
  96         if (resolution == 0 || resolution > 400)
  97                 resolution = 400;
  98
  99         ps2_command(&psmouse->ps2dev, &params[resolution / 100], PSMOUSE_CMD_SETRES);
 100         psmouse->resolution = 50 << params[resolution / 100];
 101 }
 102
 103 static void lifebook_disconnect(struct psmouse *psmouse)
 104 {
 105         psmouse_reset(psmouse);
 106 }
 107
 108 int lifebook_detect(struct psmouse *psmouse, int set_properties)
 109 {
 110         if (!dmi_check_system(lifebook_dmi_table))
 111                 return -1;
 112
 113         if (set_properties) {
 114                 psmouse->vendor = "Fujitsu";
 115                 psmouse->name = "Lifebook TouchScreen";
 116         }
 117
 118         return 0;
 119 }
 120
 121 int lifebook_init(struct psmouse *psmouse)
 122 {
 123         struct input_dev *input_dev = psmouse->dev;
 124
 125         if (lifebook_absolute_mode(psmouse))
 126                 return -1;
 127
 128         input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
 129         input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 130         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 131         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
 132         input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0);
 133         input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0);
 134
 135         psmouse->protocol_handler = lifebook_process_byte;
 136         psmouse->set_resolution = lifebook_set_resolution;
 137         psmouse->disconnect = lifebook_disconnect;
 138         psmouse->reconnect  = lifebook_absolute_mode;
 139         psmouse->pktsize = 3;
 140
 141         return 0;
 142 }
 143