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