1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Fujitsu B-series Lifebook PS/2 TouchScreen driver 4 * 5 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Kenan Esau <kenan.esau@conan.de> 7 * 8 * TouchScreen detection, absolute mode setting and packet layout is taken from 9 * Harald Hoyer's description of the device. 10 */ 11 12 #include <linux/input.h> 13 #include <linux/serio.h> 14 #include <linux/libps2.h> 15 #include <linux/dmi.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 19 #include "psmouse.h" 20 #include "lifebook.h" 21 22 struct lifebook_data { 23 struct input_dev *dev2; /* Relative device */ 24 char phys[32]; 25 }; 26 27 static bool lifebook_present; 28 29 static const char *desired_serio_phys; 30 31 static int lifebook_limit_serio3(const struct dmi_system_id *d) 32 { 33 desired_serio_phys = "isa0060/serio3"; 34 return 1; 35 } 36 37 static bool lifebook_use_6byte_proto; 38 39 static int lifebook_set_6byte_proto(const struct dmi_system_id *d) 40 { 41 lifebook_use_6byte_proto = true; 42 return 1; 43 } 44 45 static const struct dmi_system_id lifebook_dmi_table[] __initconst = { 46 { 47 /* FLORA-ie 55mi */ 48 .matches = { 49 DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"), 50 }, 51 }, 52 { 53 /* LifeBook B */ 54 .matches = { 55 DMI_MATCH(DMI_PRODUCT_NAME, "Lifebook B Series"), 56 }, 57 }, 58 { 59 /* LifeBook B */ 60 .matches = { 61 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"), 62 }, 63 }, 64 { 65 /* Lifebook B */ 66 .matches = { 67 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"), 68 }, 69 }, 70 { 71 /* Lifebook B-2130 */ 72 .matches = { 73 DMI_MATCH(DMI_BOARD_NAME, "ZEPHYR"), 74 }, 75 }, 76 { 77 /* Lifebook B213x/B2150 */ 78 .matches = { 79 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"), 80 }, 81 }, 82 { 83 /* Zephyr */ 84 .matches = { 85 DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"), 86 }, 87 }, 88 { 89 /* Panasonic CF-18 */ 90 .matches = { 91 DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"), 92 }, 93 .callback = lifebook_limit_serio3, 94 }, 95 { 96 /* Panasonic CF-28 */ 97 .matches = { 98 DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"), 99 DMI_MATCH(DMI_PRODUCT_NAME, "CF-28"), 100 }, 101 .callback = lifebook_set_6byte_proto, 102 }, 103 { 104 /* Panasonic CF-29 */ 105 .matches = { 106 DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"), 107 DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"), 108 }, 109 .callback = lifebook_set_6byte_proto, 110 }, 111 { 112 /* Panasonic CF-72 */ 113 .matches = { 114 DMI_MATCH(DMI_PRODUCT_NAME, "CF-72"), 115 }, 116 .callback = lifebook_set_6byte_proto, 117 }, 118 { 119 /* Lifebook B142 */ 120 .matches = { 121 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"), 122 }, 123 }, 124 { } 125 }; 126 127 void __init lifebook_module_init(void) 128 { 129 lifebook_present = dmi_check_system(lifebook_dmi_table); 130 } 131 132 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse) 133 { 134 struct lifebook_data *priv = psmouse->private; 135 struct input_dev *dev1 = psmouse->dev; 136 struct input_dev *dev2 = priv ? priv->dev2 : NULL; 137 u8 *packet = psmouse->packet; 138 bool relative_packet = packet[0] & 0x08; 139 140 if (relative_packet || !lifebook_use_6byte_proto) { 141 if (psmouse->pktcnt != 3) 142 return PSMOUSE_GOOD_DATA; 143 } else { 144 switch (psmouse->pktcnt) { 145 case 1: 146 return (packet[0] & 0xf8) == 0x00 ? 147 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 148 case 2: 149 return PSMOUSE_GOOD_DATA; 150 case 3: 151 return ((packet[2] & 0x30) << 2) == (packet[2] & 0xc0) ? 152 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 153 case 4: 154 return (packet[3] & 0xf8) == 0xc0 ? 155 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 156 case 5: 157 return (packet[4] & 0xc0) == (packet[2] & 0xc0) ? 158 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 159 case 6: 160 if (((packet[5] & 0x30) << 2) != (packet[5] & 0xc0)) 161 return PSMOUSE_BAD_DATA; 162 if ((packet[5] & 0xc0) != (packet[1] & 0xc0)) 163 return PSMOUSE_BAD_DATA; 164 break; /* report data */ 165 } 166 } 167 168 if (relative_packet) { 169 if (!dev2) 170 psmouse_warn(psmouse, 171 "got relative packet but no relative device set up\n"); 172 } else { 173 if (lifebook_use_6byte_proto) { 174 input_report_abs(dev1, ABS_X, 175 ((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f)); 176 input_report_abs(dev1, ABS_Y, 177 4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f))); 178 } else { 179 input_report_abs(dev1, ABS_X, 180 (packet[1] | ((packet[0] & 0x30) << 4))); 181 input_report_abs(dev1, ABS_Y, 182 1024 - (packet[2] | ((packet[0] & 0xC0) << 2))); 183 } 184 input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04); 185 input_sync(dev1); 186 } 187 188 if (dev2) { 189 if (relative_packet) 190 psmouse_report_standard_motion(dev2, packet); 191 192 psmouse_report_standard_buttons(dev2, packet[0]); 193 input_sync(dev2); 194 } 195 196 return PSMOUSE_FULL_PACKET; 197 } 198 199 static int lifebook_absolute_mode(struct psmouse *psmouse) 200 { 201 struct ps2dev *ps2dev = &psmouse->ps2dev; 202 u8 param; 203 int error; 204 205 error = psmouse_reset(psmouse); 206 if (error) 207 return error; 208 209 /* 210 * Enable absolute output -- ps2_command fails always but if 211 * you leave this call out the touchscreen will never send 212 * absolute coordinates 213 */ 214 param = lifebook_use_6byte_proto ? 0x08 : 0x07; 215 ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES); 216 217 return 0; 218 } 219 220 static void lifebook_relative_mode(struct psmouse *psmouse) 221 { 222 struct ps2dev *ps2dev = &psmouse->ps2dev; 223 u8 param = 0x06; 224 225 ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES); 226 } 227 228 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution) 229 { 230 static const u8 params[] = { 0, 1, 2, 2, 3 }; 231 u8 p; 232 233 if (resolution == 0 || resolution > 400) 234 resolution = 400; 235 236 p = params[resolution / 100]; 237 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 238 psmouse->resolution = 50 << p; 239 } 240 241 static void lifebook_disconnect(struct psmouse *psmouse) 242 { 243 struct lifebook_data *priv = psmouse->private; 244 245 psmouse_reset(psmouse); 246 if (priv) { 247 input_unregister_device(priv->dev2); 248 kfree(priv); 249 } 250 psmouse->private = NULL; 251 } 252 253 int lifebook_detect(struct psmouse *psmouse, bool set_properties) 254 { 255 if (!lifebook_present) 256 return -ENXIO; 257 258 if (desired_serio_phys && 259 strcmp(psmouse->ps2dev.serio->phys, desired_serio_phys)) 260 return -ENXIO; 261 262 if (set_properties) { 263 psmouse->vendor = "Fujitsu"; 264 psmouse->name = "Lifebook TouchScreen"; 265 } 266 267 return 0; 268 } 269 270 static int lifebook_create_relative_device(struct psmouse *psmouse) 271 { 272 struct input_dev *dev2; 273 struct lifebook_data *priv; 274 int error = -ENOMEM; 275 276 priv = kzalloc(sizeof(struct lifebook_data), GFP_KERNEL); 277 dev2 = input_allocate_device(); 278 if (!priv || !dev2) 279 goto err_out; 280 281 priv->dev2 = dev2; 282 snprintf(priv->phys, sizeof(priv->phys), 283 "%s/input1", psmouse->ps2dev.serio->phys); 284 285 dev2->phys = priv->phys; 286 dev2->name = "LBPS/2 Fujitsu Lifebook Touchpad"; 287 dev2->id.bustype = BUS_I8042; 288 dev2->id.vendor = 0x0002; 289 dev2->id.product = PSMOUSE_LIFEBOOK; 290 dev2->id.version = 0x0000; 291 dev2->dev.parent = &psmouse->ps2dev.serio->dev; 292 293 input_set_capability(dev2, EV_REL, REL_X); 294 input_set_capability(dev2, EV_REL, REL_Y); 295 input_set_capability(dev2, EV_KEY, BTN_LEFT); 296 input_set_capability(dev2, EV_KEY, BTN_RIGHT); 297 298 error = input_register_device(priv->dev2); 299 if (error) 300 goto err_out; 301 302 psmouse->private = priv; 303 return 0; 304 305 err_out: 306 input_free_device(dev2); 307 kfree(priv); 308 return error; 309 } 310 311 int lifebook_init(struct psmouse *psmouse) 312 { 313 struct input_dev *dev1 = psmouse->dev; 314 int max_coord = lifebook_use_6byte_proto ? 4096 : 1024; 315 int error; 316 317 error = lifebook_absolute_mode(psmouse); 318 if (error) 319 return error; 320 321 /* Clear default capabilities */ 322 bitmap_zero(dev1->evbit, EV_CNT); 323 bitmap_zero(dev1->relbit, REL_CNT); 324 bitmap_zero(dev1->keybit, KEY_CNT); 325 326 input_set_capability(dev1, EV_KEY, 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 error = lifebook_create_relative_device(psmouse); 332 if (error) { 333 lifebook_relative_mode(psmouse); 334 return error; 335 } 336 } 337 338 psmouse->protocol_handler = lifebook_process_byte; 339 psmouse->set_resolution = lifebook_set_resolution; 340 psmouse->disconnect = lifebook_disconnect; 341 psmouse->reconnect = lifebook_absolute_mode; 342 343 psmouse->model = lifebook_use_6byte_proto ? 6 : 3; 344 345 /* 346 * Use packet size = 3 even when using 6-byte protocol because 347 * that's what POLL will return on Lifebooks (according to spec). 348 */ 349 psmouse->pktsize = 3; 350 351 return 0; 352 } 353 354