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 #include <linux/slab.h>
  20
  21 #include "psmouse.h"
  22 #include "lifebook.h"
  23
  24 struct lifebook_data {
  25         struct input_dev *dev2;         /* Relative device */
  26         char phys[32];
  27 };
  28
  29 static bool lifebook_present;
  30
  31 static const char *desired_serio_phys;
  32
  33 static int lifebook_limit_serio3(const struct dmi_system_id *d)
  34 {
  35         desired_serio_phys = "isa0060/serio3";
  36         return 1;
  37 }
  38
  39 static bool lifebook_use_6byte_proto;
  40
  41 static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
  42 {
  43         lifebook_use_6byte_proto = true;
  44         return 1;
  45 }
  46
  47 static const struct dmi_system_id lifebook_dmi_table[] __initconst = {
  48         {
  49                 /* FLORA-ie 55mi */
  50                 .matches = {
  51                         DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
  52                 },
  53         },
  54         {
  55                 /* LifeBook B */
  56                 .matches = {
  57                         DMI_MATCH(DMI_PRODUCT_NAME, "Lifebook B Series"),
  58                 },
  59         },
  60         {
  61                 /* LifeBook B */
  62                 .matches = {
  63                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"),
  64                 },
  65         },
  66         {
  67                 /* Lifebook B */
  68                 .matches = {
  69                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
  70                 },
  71         },
  72         {
  73                 /* Lifebook B-2130 */
  74                 .matches = {
  75                         DMI_MATCH(DMI_BOARD_NAME, "ZEPHYR"),
  76                 },
  77         },
  78         {
  79                 /* Lifebook B213x/B2150 */
  80                 .matches = {
  81                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
  82                 },
  83         },
  84         {
  85                 /* Zephyr */
  86                 .matches = {
  87                         DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
  88                 },
  89         },
  90         {
  91                 /* Panasonic CF-18 */
  92                 .matches = {
  93                         DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
  94                 },
  95                 .callback = lifebook_limit_serio3,
  96         },
  97         {
  98                 /* Panasonic CF-28 */
  99                 .matches = {
 100                         DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
 101                         DMI_MATCH(DMI_PRODUCT_NAME, "CF-28"),
 102                 },
 103                 .callback = lifebook_set_6byte_proto,
 104         },
 105         {
 106                 /* Panasonic CF-29 */
 107                 .matches = {
 108                         DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
 109                         DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"),
 110                 },
 111                 .callback = lifebook_set_6byte_proto,
 112         },
 113         {
 114                 /* Panasonic CF-72 */
 115                 .matches = {
 116                         DMI_MATCH(DMI_PRODUCT_NAME, "CF-72"),
 117                 },
 118                 .callback = lifebook_set_6byte_proto,
 119         },
 120         {
 121                 /* Lifebook B142 */
 122                 .matches = {
 123                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
 124                 },
 125         },
 126         { }
 127 };
 128
 129 void __init lifebook_module_init(void)
 130 {
 131         lifebook_present = dmi_check_system(lifebook_dmi_table);
 132 }
 133
 134 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
 135 {
 136         struct lifebook_data *priv = psmouse->private;
 137         struct input_dev *dev1 = psmouse->dev;
 138         struct input_dev *dev2 = priv ? priv->dev2 : NULL;
 139         unsigned char *packet = psmouse->packet;
 140         bool relative_packet = packet[0] & 0x08;
 141
 142         if (relative_packet || !lifebook_use_6byte_proto) {
 143                 if (psmouse->pktcnt != 3)
 144                         return PSMOUSE_GOOD_DATA;
 145         } else {
 146                 switch (psmouse->pktcnt) {
 147                 case 1:
 148                         return (packet[0] & 0xf8) == 0x00 ?
 149                                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 150                 case 2:
 151                         return PSMOUSE_GOOD_DATA;
 152                 case 3:
 153                         return ((packet[2] & 0x30) << 2) == (packet[2] & 0xc0) ?
 154                                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 155                 case 4:
 156                         return (packet[3] & 0xf8) == 0xc0 ?
 157                                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 158                 case 5:
 159                         return (packet[4] & 0xc0) == (packet[2] & 0xc0) ?
 160                                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 161                 case 6:
 162                         if (((packet[5] & 0x30) << 2) != (packet[5] & 0xc0))
 163                                 return PSMOUSE_BAD_DATA;
 164                         if ((packet[5] & 0xc0) != (packet[1] & 0xc0))
 165                                 return PSMOUSE_BAD_DATA;
 166                         break; /* report data */
 167                 }
 168         }
 169
 170         if (relative_packet) {
 171                 if (!dev2)
 172                         psmouse_warn(psmouse,
 173                                      "got relative packet but no relative device set up\n");
 174         } else {
 175                 if (lifebook_use_6byte_proto) {
 176                         input_report_abs(dev1, ABS_X,
 177                                 ((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
 178                         input_report_abs(dev1, ABS_Y,
 179                                 4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
 180                 } else {
 181                         input_report_abs(dev1, ABS_X,
 182                                 (packet[1] | ((packet[0] & 0x30) << 4)));
 183                         input_report_abs(dev1, ABS_Y,
 184                                 1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
 185                 }
 186                 input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04);
 187                 input_sync(dev1);
 188         }
 189
 190         if (dev2) {
 191                 if (relative_packet) {
 192                         input_report_rel(dev2, REL_X,
 193                                 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
 194                         input_report_rel(dev2, REL_Y,
 195                                  -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
 196                 }
 197                 input_report_key(dev2, BTN_LEFT, packet[0] & 0x01);
 198                 input_report_key(dev2, BTN_RIGHT, packet[0] & 0x02);
 199                 input_sync(dev2);
 200         }
 201
 202         return PSMOUSE_FULL_PACKET;
 203 }
 204
 205 static int lifebook_absolute_mode(struct psmouse *psmouse)
 206 {
 207         struct ps2dev *ps2dev = &psmouse->ps2dev;
 208         unsigned char param;
 209
 210         if (psmouse_reset(psmouse))
 211                 return -1;
 212
 213         /*
 214          * Enable absolute output -- ps2_command fails always but if
 215          * you leave this call out the touchscreen will never send
 216          * absolute coordinates
 217          */
 218         param = lifebook_use_6byte_proto ? 0x08 : 0x07;
 219         ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
 220
 221         return 0;
 222 }
 223
 224 static void lifebook_relative_mode(struct psmouse *psmouse)
 225 {
 226         struct ps2dev *ps2dev = &psmouse->ps2dev;
 227         unsigned char param = 0x06;
 228
 229         ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
 230 }
 231
 232 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 233 {
 234         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
 235         unsigned char p;
 236
 237         if (resolution == 0 || resolution > 400)
 238                 resolution = 400;
 239
 240         p = params[resolution / 100];
 241         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
 242         psmouse->resolution = 50 << p;
 243 }
 244
 245 static void lifebook_disconnect(struct psmouse *psmouse)
 246 {
 247         struct lifebook_data *priv = psmouse->private;
 248
 249         psmouse_reset(psmouse);
 250         if (priv) {
 251                 input_unregister_device(priv->dev2);
 252                 kfree(priv);
 253         }
 254         psmouse->private = NULL;
 255 }
 256
 257 int lifebook_detect(struct psmouse *psmouse, bool set_properties)
 258 {
 259         if (!lifebook_present)
 260                 return -1;
 261
 262         if (desired_serio_phys &&
 263             strcmp(psmouse->ps2dev.serio->phys, desired_serio_phys))
 264                 return -1;
 265
 266         if (set_properties) {
 267                 psmouse->vendor = "Fujitsu";
 268                 psmouse->name = "Lifebook TouchScreen";
 269         }
 270
 271         return 0;
 272 }
 273
 274 static int lifebook_create_relative_device(struct psmouse *psmouse)
 275 {
 276         struct input_dev *dev2;
 277         struct lifebook_data *priv;
 278         int error = -ENOMEM;
 279
 280         priv = kzalloc(sizeof(struct lifebook_data), GFP_KERNEL);
 281         dev2 = input_allocate_device();
 282         if (!priv || !dev2)
 283                 goto err_out;
 284
 285         priv->dev2 = dev2;
 286         snprintf(priv->phys, sizeof(priv->phys),
 287                  "%s/input1", psmouse->ps2dev.serio->phys);
 288
 289         dev2->phys = priv->phys;
 290         dev2->name = "LBPS/2 Fujitsu Lifebook Touchpad";
 291         dev2->id.bustype = BUS_I8042;
 292         dev2->id.vendor  = 0x0002;
 293         dev2->id.product = PSMOUSE_LIFEBOOK;
 294         dev2->id.version = 0x0000;
 295         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 296
 297         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 298         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 299         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 300                                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 301
 302         error = input_register_device(priv->dev2);
 303         if (error)
 304                 goto err_out;
 305
 306         psmouse->private = priv;
 307         return 0;
 308
 309  err_out:
 310         input_free_device(dev2);
 311         kfree(priv);
 312         return error;
 313 }
 314
 315 int lifebook_init(struct psmouse *psmouse)
 316 {
 317         struct input_dev *dev1 = psmouse->dev;
 318         int max_coord = lifebook_use_6byte_proto ? 4096 : 1024;
 319
 320         if (lifebook_absolute_mode(psmouse))
 321                 return -1;
 322
 323         dev1->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
 324         dev1->relbit[0] = 0;
 325         dev1->keybit[BIT_WORD(BTN_MOUSE)] = 0;
 326         dev1->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 327         input_set_abs_params(dev1, ABS_X, 0, max_coord, 0, 0);
 328         input_set_abs_params(dev1, ABS_Y, 0, max_coord, 0, 0);
 329
 330         if (!desired_serio_phys) {
 331                 if (lifebook_create_relative_device(psmouse)) {
 332                         lifebook_relative_mode(psmouse);
 333                         return -1;
 334                 }
 335         }
 336
 337         psmouse->protocol_handler = lifebook_process_byte;
 338         psmouse->set_resolution = lifebook_set_resolution;
 339         psmouse->disconnect = lifebook_disconnect;
 340         psmouse->reconnect  = lifebook_absolute_mode;
 341
 342         psmouse->model = lifebook_use_6byte_proto ? 6 : 3;
 343
 344         /*
 345          * Use packet size = 3 even when using 6-byte protocol because
 346          * that's what POLL will return on Lifebooks (according to spec).
 347          */
 348         psmouse->pktsize = 3;
 349
 350         return 0;
 351 }
 352