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(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(dev1, ABS_X,
175				((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
176			input_report_abs(dev1, ABS_Y,
177				4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
178		} else {
179			input_report_abs(dev1, ABS_X,
180				(packet[1] | ((packet[0] & 0x30) << 4)));
181			input_report_abs(dev1, ABS_Y,
182				1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
183		}
184		input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04);
185		input_sync(dev1);
186	}
187
188	if (dev2) {
189		if (relative_packet)
190			psmouse_report_standard_motion(dev2, packet);
191
192		psmouse_report_standard_buttons(dev2, packet[0]);
193		input_sync(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, 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, 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(&psmouse->ps2dev, &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(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(struct lifebook_data), GFP_KERNEL);
277	dev2 = input_allocate_device();
278	if (!priv || !dev2)
279		goto err_out;
280
281	priv->dev2 = dev2;
282	snprintf(priv->phys, sizeof(priv->phys),
283		 "%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(dev2, EV_REL, REL_X);
294	input_set_capability(dev2, EV_REL, REL_Y);
295	input_set_capability(dev2, EV_KEY, BTN_LEFT);
296	input_set_capability(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(dev2);
307	kfree(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(dev1->evbit, EV_CNT);
323	bitmap_zero(dev1->relbit, REL_CNT);
324	bitmap_zero(dev1->keybit, KEY_CNT);
325
326	input_set_capability(dev1, EV_KEY, 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		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