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
20#include "psmouse.h"
21#include "lifebook.h"
22
23struct lifebook_data {
24	struct input_dev *dev2;		/* Relative device */
25	char phys[32];
26};
27
28static const char *desired_serio_phys;
29
30static int lifebook_set_serio_phys(struct dmi_system_id *d)
31{
32	desired_serio_phys = d->driver_data;
33	return 0;
34}
35
36static unsigned char lifebook_use_6byte_proto;
37
38static int lifebook_set_6byte_proto(struct dmi_system_id *d)
39{
40	lifebook_use_6byte_proto = 1;
41	return 0;
42}
43
44static struct dmi_system_id lifebook_dmi_table[] = {
45	{
46		.ident = "FLORA-ie 55mi",
47		.matches = {
48			DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
49		},
50	},
51	{
52		.ident = "LifeBook B",
53		.matches = {
54			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"),
55		},
56	},
57	{
58		.ident = "Lifebook B",
59		.matches = {
60			DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
61		},
62	},
63	{
64		.ident = "Lifebook B213x/B2150",
65		.matches = {
66			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
67		},
68	},
69	{
70		.ident = "Zephyr",
71		.matches = {
72			DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
73		},
74	},
75	{
76		.ident = "CF-18",
77		.matches = {
78			DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
79		},
80		.callback = lifebook_set_serio_phys,
81		.driver_data = "isa0060/serio3",
82	},
83	{
84		.ident = "Panasonic CF-28",
85		.matches = {
86			DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
87			DMI_MATCH(DMI_PRODUCT_NAME, "CF-28"),
88		},
89		.callback = lifebook_set_6byte_proto,
90	},
91	{
92		.ident = "Panasonic CF-29",
93		.matches = {
94			DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
95			DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"),
96		},
97		.callback = lifebook_set_6byte_proto,
98	},
99	{
100		.ident = "Lifebook B142",
101		.matches = {
102			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
103		},
104	},
105	{ }
106};
107
108static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
109{
110	struct lifebook_data *priv = psmouse->private;
111	struct input_dev *dev1 = psmouse->dev;
112	struct input_dev *dev2 = priv->dev2;
113	unsigned char *packet = psmouse->packet;
114	int relative_packet = packet[0] & 0x08;
115
116	if (relative_packet || !lifebook_use_6byte_proto) {
117		if (psmouse->pktcnt != 3)
118			return PSMOUSE_GOOD_DATA;
119	} else {
120		switch (psmouse->pktcnt) {
121		case 1:
122			return (packet[0] & 0xf8) == 0x00 ?
123				PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
124		case 2:
125			return PSMOUSE_GOOD_DATA;
126		case 3:
127			return ((packet[2] & 0x30) << 2) == (packet[2] & 0xc0) ?
128				PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
129		case 4:
130			return (packet[3] & 0xf8) == 0xc0 ?
131				PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
132		case 5:
133			return (packet[4] & 0xc0) == (packet[2] & 0xc0) ?
134				PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
135		case 6:
136			if (((packet[5] & 0x30) << 2) != (packet[5] & 0xc0))
137				return PSMOUSE_BAD_DATA;
138			if ((packet[5] & 0xc0) != (packet[1] & 0xc0))
139				return PSMOUSE_BAD_DATA;
140			break; /* report data */
141		}
142	}
143
144	if (relative_packet) {
145		if (!dev2)
146			printk(KERN_WARNING "lifebook.c: got relative packet "
147				"but no relative device set up\n");
148	} else if (lifebook_use_6byte_proto) {
149		input_report_abs(dev1, ABS_X,
150				 ((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
151		input_report_abs(dev1, ABS_Y,
152				 4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
153	} else {
154		input_report_abs(dev1, ABS_X,
155				 (packet[1] | ((packet[0] & 0x30) << 4)));
156		input_report_abs(dev1, ABS_Y,
157				 1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
158	}
159
160	input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04);
161	input_sync(dev1);
162
163	if (dev2) {
164		if (relative_packet) {
165			input_report_rel(dev2, REL_X,
166				((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
167			input_report_rel(dev2, REL_Y,
168				 -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
169		}
170		input_report_key(dev2, BTN_LEFT, packet[0] & 0x01);
171		input_report_key(dev2, BTN_RIGHT, packet[0] & 0x02);
172		input_sync(dev2);
173	}
174
175	return PSMOUSE_FULL_PACKET;
176}
177
178static int lifebook_absolute_mode(struct psmouse *psmouse)
179{
180	struct ps2dev *ps2dev = &psmouse->ps2dev;
181	unsigned char param;
182
183	if (psmouse_reset(psmouse))
184		return -1;
185
186	/*
187	   Enable absolute output -- ps2_command fails always but if
188	   you leave this call out the touchsreen will never send
189	   absolute coordinates
190	*/
191	param = lifebook_use_6byte_proto ? 0x08 : 0x07;
192	ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
193
194	return 0;
195}
196
197static void lifebook_relative_mode(struct psmouse *psmouse)
198{
199	struct ps2dev *ps2dev = &psmouse->ps2dev;
200	unsigned char param = 0x06;
201
202	ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
203}
204
205static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
206{
207	static const unsigned char params[] = { 0, 1, 2, 2, 3 };
208	unsigned char p;
209
210	if (resolution == 0 || resolution > 400)
211		resolution = 400;
212
213	p = params[resolution / 100];
214	ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
215	psmouse->resolution = 50 << p;
216}
217
218static void lifebook_disconnect(struct psmouse *psmouse)
219{
220	psmouse_reset(psmouse);
221	kfree(psmouse->private);
222	psmouse->private = NULL;
223}
224
225int lifebook_detect(struct psmouse *psmouse, int set_properties)
226{
227        if (!dmi_check_system(lifebook_dmi_table))
228                return -1;
229
230	if (desired_serio_phys &&
231	    strcmp(psmouse->ps2dev.serio->phys, desired_serio_phys))
232		return -1;
233
234	if (set_properties) {
235		psmouse->vendor = "Fujitsu";
236		psmouse->name = "Lifebook TouchScreen";
237	}
238
239        return 0;
240}
241
242static int lifebook_create_relative_device(struct psmouse *psmouse)
243{
244	struct input_dev *dev2;
245	struct lifebook_data *priv;
246	int error = -ENOMEM;
247
248	priv = kzalloc(sizeof(struct lifebook_data), GFP_KERNEL);
249	dev2 = input_allocate_device();
250	if (!priv || !dev2)
251		goto err_out;
252
253	priv->dev2 = dev2;
254	snprintf(priv->phys, sizeof(priv->phys),
255		 "%s/input1", psmouse->ps2dev.serio->phys);
256
257	dev2->phys = priv->phys;
258	dev2->name = "PS/2 Touchpad";
259	dev2->id.bustype = BUS_I8042;
260	dev2->id.vendor  = 0x0002;
261	dev2->id.product = PSMOUSE_LIFEBOOK;
262	dev2->id.version = 0x0000;
263	dev2->dev.parent = &psmouse->ps2dev.serio->dev;
264
265	dev2->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
266	dev2->relbit[LONG(REL_X)] = BIT(REL_X) | BIT(REL_Y);
267	dev2->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);
268
269	error = input_register_device(priv->dev2);
270	if (error)
271		goto err_out;
272
273	psmouse->private = priv;
274	return 0;
275
276 err_out:
277	input_free_device(dev2);
278	kfree(priv);
279	return error;
280}
281
282int lifebook_init(struct psmouse *psmouse)
283{
284	struct input_dev *dev1 = psmouse->dev;
285	int max_coord = lifebook_use_6byte_proto ? 1024 : 4096;
286
287	if (lifebook_absolute_mode(psmouse))
288		return -1;
289
290	dev1->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
291	dev1->relbit[0] = 0;
292	dev1->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
293	input_set_abs_params(dev1, ABS_X, 0, max_coord, 0, 0);
294	input_set_abs_params(dev1, ABS_Y, 0, max_coord, 0, 0);
295
296	if (!desired_serio_phys) {
297		if (lifebook_create_relative_device(psmouse)) {
298			lifebook_relative_mode(psmouse);
299			return -1;
300		}
301	}
302
303	psmouse->protocol_handler = lifebook_process_byte;
304	psmouse->set_resolution = lifebook_set_resolution;
305	psmouse->disconnect = lifebook_disconnect;
306	psmouse->reconnect  = lifebook_absolute_mode;
307
308	psmouse->model = lifebook_use_6byte_proto ? 6 : 3;
309
310	/*
311	 * Use packet size = 3 even when using 6-byte protocol because
312	 * that's what POLL will return on Lifebooks (according to spec).
313	 */
314	psmouse->pktsize = 3;
315
316	return 0;
317}
318