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 
22 struct lifebook_data {
23 	struct input_dev *dev2;		/* Relative device */
24 	char phys[32];
25 };
26 
27 static bool lifebook_present;
28 
29 static const char *desired_serio_phys;
30 
lifebook_limit_serio3(const struct dmi_system_id * d)31 static int lifebook_limit_serio3(const struct dmi_system_id *d)
32 {
33 	desired_serio_phys = "isa0060/serio3";
34 	return 1;
35 }
36 
37 static bool lifebook_use_6byte_proto;
38 
lifebook_set_6byte_proto(const struct dmi_system_id * d)39 static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
40 {
41 	lifebook_use_6byte_proto = true;
42 	return 1;
43 }
44 
45 static 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 
lifebook_module_init(void)127 void __init lifebook_module_init(void)
128 {
129 	lifebook_present = dmi_check_system(lifebook_dmi_table);
130 }
131 
lifebook_process_byte(struct psmouse * psmouse)132 static 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 
lifebook_absolute_mode(struct psmouse * psmouse)199 static 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 
lifebook_relative_mode(struct psmouse * psmouse)220 static 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 
lifebook_set_resolution(struct psmouse * psmouse,unsigned int resolution)228 static 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 
lifebook_disconnect(struct psmouse * psmouse)241 static 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 
lifebook_detect(struct psmouse * psmouse,bool set_properties)253 int 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 
lifebook_create_relative_device(struct psmouse * psmouse)270 static 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 
lifebook_init(struct psmouse * psmouse)311 int 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