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, struct pt_regs *regs) 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 input_regs(dev, regs); 74 75 /* calculate X and Y */ 76 if ((packet[0] & 0x08) == 0x00) { 77 input_report_abs(dev, ABS_X, 78 (packet[1] | ((packet[0] & 0x30) << 4))); 79 input_report_abs(dev, ABS_Y, 80 1024 - (packet[2] | ((packet[0] & 0xC0) << 2))); 81 } else { 82 input_report_rel(dev, REL_X, 83 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1])); 84 input_report_rel(dev, REL_Y, 85 -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2])); 86 } 87 88 input_report_key(dev, BTN_LEFT, packet[0] & 0x01); 89 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); 90 input_report_key(dev, BTN_TOUCH, packet[0] & 0x04); 91 92 input_sync(dev); 93 94 return PSMOUSE_FULL_PACKET; 95 } 96 97 static int lifebook_absolute_mode(struct psmouse *psmouse) 98 { 99 struct ps2dev *ps2dev = &psmouse->ps2dev; 100 unsigned char param; 101 102 if (psmouse_reset(psmouse)) 103 return -1; 104 105 /* 106 Enable absolute output -- ps2_command fails always but if 107 you leave this call out the touchsreen will never send 108 absolute coordinates 109 */ 110 param = 0x07; 111 ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES); 112 113 return 0; 114 } 115 116 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution) 117 { 118 unsigned char params[] = { 0, 1, 2, 2, 3 }; 119 120 if (resolution == 0 || resolution > 400) 121 resolution = 400; 122 123 ps2_command(&psmouse->ps2dev, ¶ms[resolution / 100], PSMOUSE_CMD_SETRES); 124 psmouse->resolution = 50 << params[resolution / 100]; 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 } 167 168