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 B",
  32                .matches = {
  33                        DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
  34                },
  35        },
  36        {
  37                .ident = "Lifebook B213x/B2150",
  38                .matches = {
  39                        DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
  40                },
  41        },
  42        {
  43                .ident = "Zephyr",
  44                .matches = {
  45                        DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
  46                },
  47        },
  48        {
  49                .ident = "CF-18",
  50                .matches = {
  51                        DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
  52                },
  53        },
  54        {
  55                .ident = "Lifebook B142",
  56                .matches = {
  57                        DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
  58                },
  59
  60        },
  61        { }
  62 };
  63
  64
  65 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
  66 {
  67         unsigned char *packet = psmouse->packet;
  68         struct input_dev *dev = psmouse->dev;
  69
  70         if (psmouse->pktcnt != 3)
  71                 return PSMOUSE_GOOD_DATA;
  72
  73         /* calculate X and Y */
  74         if ((packet[0] & 0x08) == 0x00) {
  75                 input_report_abs(dev, ABS_X,
  76                                  (packet[1] | ((packet[0] & 0x30) << 4)));
  77                 input_report_abs(dev, ABS_Y,
  78                                  1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
  79         } else {
  80                 input_report_rel(dev, REL_X,
  81                                 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
  82                 input_report_rel(dev, REL_Y,
  83                                  -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
  84         }
  85
  86         input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
  87         input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
  88         input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
  89
  90         input_sync(dev);
  91
  92         return PSMOUSE_FULL_PACKET;
  93 }
  94
  95 static int lifebook_absolute_mode(struct psmouse *psmouse)
  96 {
  97         struct ps2dev *ps2dev = &psmouse->ps2dev;
  98         unsigned char param;
  99
 100         if (psmouse_reset(psmouse))
 101                 return -1;
 102
 103         /*
 104            Enable absolute output -- ps2_command fails always but if
 105            you leave this call out the touchsreen will never send
 106            absolute coordinates
 107         */
 108         param = 0x07;
 109         ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
 110
 111         return 0;
 112 }
 113
 114 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 115 {
 116         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
 117         unsigned char p;
 118
 119         if (resolution == 0 || resolution > 400)
 120                 resolution = 400;
 121
 122         p = params[resolution / 100];
 123         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
 124         psmouse->resolution = 50 << p;
 125 }
 126
 127 static void lifebook_disconnect(struct psmouse *psmouse)
 128 {
 129         psmouse_reset(psmouse);
 130 }
 131
 132 int lifebook_detect(struct psmouse *psmouse, int set_properties)
 133 {
 134         if (!dmi_check_system(lifebook_dmi_table))
 135                 return -1;
 136
 137         if (set_properties) {
 138                 psmouse->vendor = "Fujitsu";
 139                 psmouse->name = "Lifebook TouchScreen";
 140         }
 141
 142         return 0;
 143 }
 144
 145 int lifebook_init(struct psmouse *psmouse)
 146 {
 147         struct input_dev *input_dev = psmouse->dev;
 148
 149         if (lifebook_absolute_mode(psmouse))
 150                 return -1;
 151
 152         input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
 153         input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 154         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 155         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
 156         input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0);
 157         input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0);
 158
 159         psmouse->protocol_handler = lifebook_process_byte;
 160         psmouse->set_resolution = lifebook_set_resolution;
 161         psmouse->disconnect = lifebook_disconnect;
 162         psmouse->reconnect  = lifebook_absolute_mode;
 163         psmouse->pktsize = 3;
 164
 165         return 0;
 166 }
 167