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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
24struct lifebook_data {
25 struct input_dev *dev2; /* Relative device */
26 char phys[32];
27};
28
29static bool lifebook_present;
30
31static const char *desired_serio_phys;
32
33static int lifebook_limit_serio3(const struct dmi_system_id *d)
34{
35 desired_serio_phys = "isa0060/serio3";
36 return 1;
37}
38
39static bool lifebook_use_6byte_proto;
40
41static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
42{
43 lifebook_use_6byte_proto = true;
44 return 1;
45}
46
47static const struct dmi_system_id __initconst lifebook_dmi_table[] = {
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
129void __init lifebook_module_init(void)
130{
131 lifebook_present = dmi_check_system(lifebook_dmi_table);
132}
133
134static 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
205static 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, ¶m, PSMOUSE_CMD_SETRES);
220
221 return 0;
222}
223
224static void lifebook_relative_mode(struct psmouse *psmouse)
225{
226 struct ps2dev *ps2dev = &psmouse->ps2dev;
227 unsigned char param = 0x06;
228
229 ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES);
230}
231
232static 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
245static 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
257int 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
274static 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 = "PS/2 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
315int 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