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