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
22struct lifebook_data {
23 struct input_dev *dev2; /* Relative device */
24 char phys[32];
25};
26
27static bool lifebook_present;
28
29static const char *desired_serio_phys;
30
31static int lifebook_limit_serio3(const struct dmi_system_id *d)
32{
33 desired_serio_phys = "isa0060/serio3";
34 return 1;
35}
36
37static bool lifebook_use_6byte_proto;
38
39static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
40{
41 lifebook_use_6byte_proto = true;
42 return 1;
43}
44
45static 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
127void __init lifebook_module_init(void)
128{
129 lifebook_present = dmi_check_system(list: lifebook_dmi_table);
130}
131
132static 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(dev: dev1, ABS_X,
175 value: ((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
176 input_report_abs(dev: dev1, ABS_Y,
177 value: 4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
178 } else {
179 input_report_abs(dev: dev1, ABS_X,
180 value: (packet[1] | ((packet[0] & 0x30) << 4)));
181 input_report_abs(dev: dev1, ABS_Y,
182 value: 1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
183 }
184 input_report_key(dev: dev1, BTN_TOUCH, value: packet[0] & 0x04);
185 input_sync(dev: dev1);
186 }
187
188 if (dev2) {
189 if (relative_packet)
190 psmouse_report_standard_motion(dev2, packet);
191
192 psmouse_report_standard_buttons(dev2, buttons: packet[0]);
193 input_sync(dev: dev2);
194 }
195
196 return PSMOUSE_FULL_PACKET;
197}
198
199static 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, param: &param, PSMOUSE_CMD_SETRES);
216
217 return 0;
218}
219
220static void lifebook_relative_mode(struct psmouse *psmouse)
221{
222 struct ps2dev *ps2dev = &psmouse->ps2dev;
223 u8 param = 0x06;
224
225 ps2_command(ps2dev, param: &param, PSMOUSE_CMD_SETRES);
226}
227
228static 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(ps2dev: &psmouse->ps2dev, param: &p, PSMOUSE_CMD_SETRES);
238 psmouse->resolution = 50 << p;
239}
240
241static 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(objp: priv);
249 }
250 psmouse->private = NULL;
251}
252
253int 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
270static 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(*priv), GFP_KERNEL);
277 dev2 = input_allocate_device();
278 if (!priv || !dev2)
279 goto err_out;
280
281 priv->dev2 = dev2;
282 scnprintf(buf: priv->phys, size: sizeof(priv->phys),
283 fmt: "%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(dev: dev2, EV_REL, REL_X);
294 input_set_capability(dev: dev2, EV_REL, REL_Y);
295 input_set_capability(dev: dev2, EV_KEY, BTN_LEFT);
296 input_set_capability(dev: 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(dev: dev2);
307 kfree(objp: priv);
308 return error;
309}
310
311int 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(dst: dev1->evbit, EV_CNT);
323 bitmap_zero(dst: dev1->relbit, REL_CNT);
324 bitmap_zero(dst: dev1->keybit, KEY_CNT);
325
326 input_set_capability(dev: dev1, EV_KEY, BTN_TOUCH);
327 input_set_abs_params(dev: dev1, ABS_X, min: 0, max: max_coord, fuzz: 0, flat: 0);
328 input_set_abs_params(dev: dev1, ABS_Y, min: 0, max: max_coord, fuzz: 0, flat: 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