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 B142", 32 .matches = { 33 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"), 34 }, 35 36 }, 37 { } 38 }; 39 40 41 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse, struct pt_regs *regs) 42 { 43 unsigned char *packet = psmouse->packet; 44 struct input_dev *dev = psmouse->dev; 45 46 if (psmouse->pktcnt != 3) 47 return PSMOUSE_GOOD_DATA; 48 49 input_regs(dev, regs); 50 51 /* calculate X and Y */ 52 if ((packet[0] & 0x08) == 0x00) { 53 input_report_abs(dev, ABS_X, 54 (packet[1] | ((packet[0] & 0x30) << 4))); 55 input_report_abs(dev, ABS_Y, 56 1024 - (packet[2] | ((packet[0] & 0xC0) << 2))); 57 } else { 58 input_report_rel(dev, REL_X, 59 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1])); 60 input_report_rel(dev, REL_Y, 61 -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2])); 62 } 63 64 input_report_key(dev, BTN_LEFT, packet[0] & 0x01); 65 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); 66 input_report_key(dev, BTN_TOUCH, packet[0] & 0x04); 67 68 input_sync(dev); 69 70 return PSMOUSE_FULL_PACKET; 71 } 72 73 static int lifebook_absolute_mode(struct psmouse *psmouse) 74 { 75 struct ps2dev *ps2dev = &psmouse->ps2dev; 76 unsigned char param; 77 78 if (psmouse_reset(psmouse)) 79 return -1; 80 81 /* 82 Enable absolute output -- ps2_command fails always but if 83 you leave this call out the touchsreen will never send 84 absolute coordinates 85 */ 86 param = 0x07; 87 ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES); 88 89 return 0; 90 } 91 92 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution) 93 { 94 unsigned char params[] = { 0, 1, 2, 2, 3 }; 95 96 if (resolution == 0 || resolution > 400) 97 resolution = 400; 98 99 ps2_command(&psmouse->ps2dev, ¶ms[resolution / 100], PSMOUSE_CMD_SETRES); 100 psmouse->resolution = 50 << params[resolution / 100]; 101 } 102 103 static void lifebook_disconnect(struct psmouse *psmouse) 104 { 105 psmouse_reset(psmouse); 106 } 107 108 int lifebook_detect(struct psmouse *psmouse, int set_properties) 109 { 110 if (!dmi_check_system(lifebook_dmi_table)) 111 return -1; 112 113 if (set_properties) { 114 psmouse->vendor = "Fujitsu"; 115 psmouse->name = "Lifebook TouchScreen"; 116 } 117 118 return 0; 119 } 120 121 int lifebook_init(struct psmouse *psmouse) 122 { 123 struct input_dev *input_dev = psmouse->dev; 124 125 if (lifebook_absolute_mode(psmouse)) 126 return -1; 127 128 input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL); 129 input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 130 input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); 131 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); 132 input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0); 133 input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0); 134 135 psmouse->protocol_handler = lifebook_process_byte; 136 psmouse->set_resolution = lifebook_set_resolution; 137 psmouse->disconnect = lifebook_disconnect; 138 psmouse->reconnect = lifebook_absolute_mode; 139 psmouse->pktsize = 3; 140 141 return 0; 142 } 143 144