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 lifebook_dmi_table[] __initconst = {
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, &param, 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, &param, 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
353