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lifebook.c

/*
 * Fujitsu B-series Lifebook PS/2 TouchScreen driver
 *
 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
 * Copyright (c) 2005 Kenan Esau <kenan.esau@conan.de>
 *
 * TouchScreen detection, absolute mode setting and packet layout is taken from
 * Harald Hoyer's description of the device.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/dmi.h>

#include "psmouse.h"
#include "lifebook.h"

struct lifebook_data {
      struct input_dev *dev2;       /* Relative device */
      char phys[32];
};

static const char *desired_serio_phys;

static int lifebook_set_serio_phys(const struct dmi_system_id *d)
{
      desired_serio_phys = d->driver_data;
      return 0;
}

static unsigned char lifebook_use_6byte_proto;

static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
{
      lifebook_use_6byte_proto = 1;
      return 0;
}

static const struct dmi_system_id lifebook_dmi_table[] = {
      {
            .ident = "FLORA-ie 55mi",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
            },
      },
      {
            .ident = "LifeBook B",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"),
            },
      },
      {
            .ident = "Lifebook B",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
            },
      },
      {
            .ident = "Lifebook B213x/B2150",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
            },
      },
      {
            .ident = "Zephyr",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
            },
      },
      {
            .ident = "CF-18",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
            },
            .callback = lifebook_set_serio_phys,
            .driver_data = "isa0060/serio3",
      },
      {
            .ident = "Panasonic CF-28",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "CF-28"),
            },
            .callback = lifebook_set_6byte_proto,
      },
      {
            .ident = "Panasonic CF-29",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"),
            },
            .callback = lifebook_set_6byte_proto,
      },
      {
            .ident = "CF-72",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "CF-72"),
            },
            .callback = lifebook_set_serio_phys,
            .driver_data = "isa0060/serio3",
      },
      {
            .ident = "Lifebook B142",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
            },
      },
      { }
};

static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
{
      struct lifebook_data *priv = psmouse->private;
      struct input_dev *dev1 = psmouse->dev;
      struct input_dev *dev2 = priv ? priv->dev2 : NULL;
      unsigned char *packet = psmouse->packet;
      int relative_packet = packet[0] & 0x08;

      if (relative_packet || !lifebook_use_6byte_proto) {
            if (psmouse->pktcnt != 3)
                  return PSMOUSE_GOOD_DATA;
      } else {
            switch (psmouse->pktcnt) {
            case 1:
                  return (packet[0] & 0xf8) == 0x00 ?
                        PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
            case 2:
                  return PSMOUSE_GOOD_DATA;
            case 3:
                  return ((packet[2] & 0x30) << 2) == (packet[2] & 0xc0) ?
                        PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
            case 4:
                  return (packet[3] & 0xf8) == 0xc0 ?
                        PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
            case 5:
                  return (packet[4] & 0xc0) == (packet[2] & 0xc0) ?
                        PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
            case 6:
                  if (((packet[5] & 0x30) << 2) != (packet[5] & 0xc0))
                        return PSMOUSE_BAD_DATA;
                  if ((packet[5] & 0xc0) != (packet[1] & 0xc0))
                        return PSMOUSE_BAD_DATA;
                  break; /* report data */
            }
      }

      if (relative_packet) {
            if (!dev2)
                  printk(KERN_WARNING "lifebook.c: got relative packet "
                        "but no relative device set up\n");
      } else if (lifebook_use_6byte_proto) {
            input_report_abs(dev1, ABS_X,
                         ((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
            input_report_abs(dev1, ABS_Y,
                         4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
      } else {
            input_report_abs(dev1, ABS_X,
                         (packet[1] | ((packet[0] & 0x30) << 4)));
            input_report_abs(dev1, ABS_Y,
                         1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
      }

      input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04);
      input_sync(dev1);

      if (dev2) {
            if (relative_packet) {
                  input_report_rel(dev2, REL_X,
                        ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
                  input_report_rel(dev2, REL_Y,
                         -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
            }
            input_report_key(dev2, BTN_LEFT, packet[0] & 0x01);
            input_report_key(dev2, BTN_RIGHT, packet[0] & 0x02);
            input_sync(dev2);
      }

      return PSMOUSE_FULL_PACKET;
}

static int lifebook_absolute_mode(struct psmouse *psmouse)
{
      struct ps2dev *ps2dev = &psmouse->ps2dev;
      unsigned char param;

      if (psmouse_reset(psmouse))
            return -1;

      /*
         Enable absolute output -- ps2_command fails always but if
         you leave this call out the touchsreen will never send
         absolute coordinates
      */
      param = lifebook_use_6byte_proto ? 0x08 : 0x07;
      ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);

      return 0;
}

static void lifebook_relative_mode(struct psmouse *psmouse)
{
      struct ps2dev *ps2dev = &psmouse->ps2dev;
      unsigned char param = 0x06;

      ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
}

static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
      static const unsigned char params[] = { 0, 1, 2, 2, 3 };
      unsigned char p;

      if (resolution == 0 || resolution > 400)
            resolution = 400;

      p = params[resolution / 100];
      ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
      psmouse->resolution = 50 << p;
}

static void lifebook_disconnect(struct psmouse *psmouse)
{
      struct lifebook_data *priv = psmouse->private;

      psmouse_reset(psmouse);
      if (priv) {
            input_unregister_device(priv->dev2);
            kfree(priv);
      }
      psmouse->private = NULL;
}

int lifebook_detect(struct psmouse *psmouse, int set_properties)
{
        if (!dmi_check_system(lifebook_dmi_table))
                return -1;

      if (desired_serio_phys &&
          strcmp(psmouse->ps2dev.serio->phys, desired_serio_phys))
            return -1;

      if (set_properties) {
            psmouse->vendor = "Fujitsu";
            psmouse->name = "Lifebook TouchScreen";
      }

        return 0;
}

static int lifebook_create_relative_device(struct psmouse *psmouse)
{
      struct input_dev *dev2;
      struct lifebook_data *priv;
      int error = -ENOMEM;

      priv = kzalloc(sizeof(struct lifebook_data), GFP_KERNEL);
      dev2 = input_allocate_device();
      if (!priv || !dev2)
            goto err_out;

      priv->dev2 = dev2;
      snprintf(priv->phys, sizeof(priv->phys),
             "%s/input1", psmouse->ps2dev.serio->phys);

      dev2->phys = priv->phys;
      dev2->name = "PS/2 Touchpad";
      dev2->id.bustype = BUS_I8042;
      dev2->id.vendor  = 0x0002;
      dev2->id.product = PSMOUSE_LIFEBOOK;
      dev2->id.version = 0x0000;
      dev2->dev.parent = &psmouse->ps2dev.serio->dev;

      dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
      dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
      dev2->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
            BIT_MASK(BTN_RIGHT);

      error = input_register_device(priv->dev2);
      if (error)
            goto err_out;

      psmouse->private = priv;
      return 0;

 err_out:
      input_free_device(dev2);
      kfree(priv);
      return error;
}

int lifebook_init(struct psmouse *psmouse)
{
      struct input_dev *dev1 = psmouse->dev;
      int max_coord = lifebook_use_6byte_proto ? 4096 : 1024;

      if (lifebook_absolute_mode(psmouse))
            return -1;

      dev1->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
      dev1->relbit[0] = 0;
      dev1->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
      input_set_abs_params(dev1, ABS_X, 0, max_coord, 0, 0);
      input_set_abs_params(dev1, ABS_Y, 0, max_coord, 0, 0);

      if (!desired_serio_phys) {
            if (lifebook_create_relative_device(psmouse)) {
                  lifebook_relative_mode(psmouse);
                  return -1;
            }
      }

      psmouse->protocol_handler = lifebook_process_byte;
      psmouse->set_resolution = lifebook_set_resolution;
      psmouse->disconnect = lifebook_disconnect;
      psmouse->reconnect  = lifebook_absolute_mode;

      psmouse->model = lifebook_use_6byte_proto ? 6 : 3;

      /*
       * Use packet size = 3 even when using 6-byte protocol because
       * that's what POLL will return on Lifebooks (according to spec).
       */
      psmouse->pktsize = 3;

      return 0;
}


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