Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
/*
 * Logitech PS/2++ mouse driver
 *
 * Copyright (c) 1999-2003 Vojtech Pavlik <vojtech@suse.cz>
 * Copyright (c) 2003 Eric Wong <eric@yhbt.net>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include "psmouse.h"
#include "logips2pp.h"

/* Logitech mouse types */
#define PS2PP_KIND_WHEEL	1
#define PS2PP_KIND_MX		2
#define PS2PP_KIND_TP3		3
#define PS2PP_KIND_TRACKMAN	4

/* Logitech mouse features */
#define PS2PP_WHEEL		0x01
#define PS2PP_HWHEEL		0x02
#define PS2PP_SIDE_BTN		0x04
#define PS2PP_EXTRA_BTN		0x08
#define PS2PP_TASK_BTN		0x10
#define PS2PP_NAV_BTN		0x20

struct ps2pp_info {
	u8 model;
	u8 kind;
	u16 features;
};

/*
 * Process a PS2++ or PS2T++ packet.
 */

static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
{
	struct input_dev *dev = psmouse->dev;
	unsigned char *packet = psmouse->packet;

	if (psmouse->pktcnt < 3)
		return PSMOUSE_GOOD_DATA;

/*
 * Full packet accumulated, process it
 */

	if ((packet[0] & 0x48) == 0x48 && (packet[1] & 0x02) == 0x02) {

		/* Logitech extended packet */
		switch ((packet[1] >> 4) | (packet[0] & 0x30)) {

		case 0x0d: /* Mouse extra info */

			input_report_rel(dev, packet[2] & 0x80 ? REL_HWHEEL : REL_WHEEL,
				(int) (packet[2] & 8) - (int) (packet[2] & 7));
			input_report_key(dev, BTN_SIDE, (packet[2] >> 4) & 1);
			input_report_key(dev, BTN_EXTRA, (packet[2] >> 5) & 1);

			break;

		case 0x0e: /* buttons 4, 5, 6, 7, 8, 9, 10 info */

			input_report_key(dev, BTN_SIDE, (packet[2]) & 1);
			input_report_key(dev, BTN_EXTRA, (packet[2] >> 1) & 1);
			input_report_key(dev, BTN_BACK, (packet[2] >> 3) & 1);
			input_report_key(dev, BTN_FORWARD, (packet[2] >> 4) & 1);
			input_report_key(dev, BTN_TASK, (packet[2] >> 2) & 1);

			break;

		case 0x0f: /* TouchPad extra info */

			input_report_rel(dev, packet[2] & 0x08 ? REL_HWHEEL : REL_WHEEL,
				(int) ((packet[2] >> 4) & 8) - (int) ((packet[2] >> 4) & 7));
			packet[0] = packet[2] | 0x08;
			break;

		default:
			psmouse_dbg(psmouse,
				    "Received PS2++ packet #%x, but don't know how to handle.\n",
				    (packet[1] >> 4) | (packet[0] & 0x30));
			break;
		}
	} else {
		/* Standard PS/2 motion data */
		input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
		input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
	}

	input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
	input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
	input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);

	input_sync(dev);

	return PSMOUSE_FULL_PACKET;

}

/*
 * ps2pp_cmd() sends a PS2++ command, sliced into two bit
 * pieces through the SETRES command. This is needed to send extended
 * commands to mice on notebooks that try to understand the PS/2 protocol
 * Ugly.
 */

static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned char command)
{
	if (psmouse_sliced_command(psmouse, command))
		return -1;

	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300))
		return -1;

	return 0;
}

/*
 * SmartScroll / CruiseControl for some newer Logitech mice Defaults to
 * enabled if we do nothing to it. Of course I put this in because I want it
 * disabled :P
 * 1 - enabled (if previously disabled, also default)
 * 0 - disabled
 */

static void ps2pp_set_smartscroll(struct psmouse *psmouse, bool smartscroll)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[4];

	ps2pp_cmd(psmouse, param, 0x32);

	param[0] = 0;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);

	param[0] = smartscroll;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
}

static ssize_t ps2pp_attr_show_smartscroll(struct psmouse *psmouse,
					   void *data, char *buf)
{
	return sprintf(buf, "%d\n", psmouse->smartscroll);
}

static ssize_t ps2pp_attr_set_smartscroll(struct psmouse *psmouse, void *data,
					  const char *buf, size_t count)
{
	unsigned int value;
	int err;

	err = kstrtouint(buf, 10, &value);
	if (err)
		return err;

	if (value > 1)
		return -EINVAL;

	ps2pp_set_smartscroll(psmouse, value);
	psmouse->smartscroll = value;
	return count;
}

PSMOUSE_DEFINE_ATTR(smartscroll, S_IWUSR | S_IRUGO, NULL,
			ps2pp_attr_show_smartscroll, ps2pp_attr_set_smartscroll);

/*
 * Support 800 dpi resolution _only_ if the user wants it (there are good
 * reasons to not use it even if the mouse supports it, and of course there are
 * also good reasons to use it, let the user decide).
 */

static void ps2pp_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
	if (resolution > 400) {
		struct ps2dev *ps2dev = &psmouse->ps2dev;
		unsigned char param = 3;

		ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
		ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
		ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
		ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
		psmouse->resolution = 800;
	} else
		psmouse_set_resolution(psmouse, resolution);
}

static void ps2pp_disconnect(struct psmouse *psmouse)
{
	device_remove_file(&psmouse->ps2dev.serio->dev, &psmouse_attr_smartscroll.dattr);
}

static const struct ps2pp_info *get_model_info(unsigned char model)
{
	static const struct ps2pp_info ps2pp_list[] = {
		{  1,	0,			0 },	/* Simple 2-button mouse */
		{ 12,	0,			PS2PP_SIDE_BTN},
		{ 13,	0,			0 },
		{ 15,	PS2PP_KIND_MX,					/* MX1000 */
				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN | PS2PP_HWHEEL },
		{ 40,	0,			PS2PP_SIDE_BTN },
		{ 41,	0,			PS2PP_SIDE_BTN },
		{ 42,	0,			PS2PP_SIDE_BTN },
		{ 43,	0,			PS2PP_SIDE_BTN },
		{ 50,	0,			0 },
		{ 51,	0,			0 },
		{ 52,	PS2PP_KIND_WHEEL,	PS2PP_SIDE_BTN | PS2PP_WHEEL },
		{ 53,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 56,	PS2PP_KIND_WHEEL,	PS2PP_SIDE_BTN | PS2PP_WHEEL }, /* Cordless MouseMan Wheel */
		{ 61,	PS2PP_KIND_MX,					/* MX700 */
				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
		{ 66,	PS2PP_KIND_MX,					/* MX3100 reciver */
				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN | PS2PP_HWHEEL },
		{ 72,	PS2PP_KIND_TRACKMAN,	0 },			/* T-CH11: TrackMan Marble */
		{ 73,	PS2PP_KIND_TRACKMAN,	PS2PP_SIDE_BTN },	/* TrackMan FX */
		{ 75,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 76,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 79,	PS2PP_KIND_TRACKMAN,	PS2PP_WHEEL },		/* TrackMan with wheel */
		{ 80,	PS2PP_KIND_WHEEL,	PS2PP_SIDE_BTN | PS2PP_WHEEL },
		{ 81,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 83,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 85,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 86,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 87,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 88,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 96,	0,			0 },
		{ 97,	PS2PP_KIND_TP3,		PS2PP_WHEEL | PS2PP_HWHEEL },
		{ 99,	PS2PP_KIND_WHEEL,	PS2PP_WHEEL },
		{ 100,	PS2PP_KIND_MX,					/* MX510 */
				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
		{ 111,  PS2PP_KIND_MX,	PS2PP_WHEEL | PS2PP_SIDE_BTN },	/* MX300 reports task button as side */
		{ 112,	PS2PP_KIND_MX,					/* MX500 */
				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
		{ 114,	PS2PP_KIND_MX,					/* MX310 */
				PS2PP_WHEEL | PS2PP_SIDE_BTN |
				PS2PP_TASK_BTN | PS2PP_EXTRA_BTN }
	};
	int i;

	for (i = 0; i < ARRAY_SIZE(ps2pp_list); i++)
		if (model == ps2pp_list[i].model)
			return &ps2pp_list[i];

	return NULL;
}

/*
 * Set up input device's properties based on the detected mouse model.
 */

static void ps2pp_set_model_properties(struct psmouse *psmouse,
				       const struct ps2pp_info *model_info,
				       bool using_ps2pp)
{
	struct input_dev *input_dev = psmouse->dev;

	if (model_info->features & PS2PP_SIDE_BTN)
		__set_bit(BTN_SIDE, input_dev->keybit);

	if (model_info->features & PS2PP_EXTRA_BTN)
		__set_bit(BTN_EXTRA, input_dev->keybit);

	if (model_info->features & PS2PP_TASK_BTN)
		__set_bit(BTN_TASK, input_dev->keybit);

	if (model_info->features & PS2PP_NAV_BTN) {
		__set_bit(BTN_FORWARD, input_dev->keybit);
		__set_bit(BTN_BACK, input_dev->keybit);
	}

	if (model_info->features & PS2PP_WHEEL)
		__set_bit(REL_WHEEL, input_dev->relbit);

	if (model_info->features & PS2PP_HWHEEL)
		__set_bit(REL_HWHEEL, input_dev->relbit);

	switch (model_info->kind) {

	case PS2PP_KIND_WHEEL:
		psmouse->name = "Wheel Mouse";
		break;

	case PS2PP_KIND_MX:
		psmouse->name = "MX Mouse";
		break;

	case PS2PP_KIND_TP3:
		psmouse->name = "TouchPad 3";
		break;

	case PS2PP_KIND_TRACKMAN:
		psmouse->name = "TrackMan";
		break;

	default:
		/*
		 * Set name to "Mouse" only when using PS2++,
		 * otherwise let other protocols define suitable
		 * name
		 */
		if (using_ps2pp)
			psmouse->name = "Mouse";
		break;
	}
}


/*
 * Logitech magic init. Detect whether the mouse is a Logitech one
 * and its exact model and try turning on extended protocol for ones
 * that support it.
 */

int ps2pp_init(struct psmouse *psmouse, bool set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[4];
	unsigned char model, buttons;
	const struct ps2pp_info *model_info;
	bool use_ps2pp = false;
	int error;

	param[0] = 0;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	param[1] = 0;
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);

	model = ((param[0] >> 4) & 0x07) | ((param[0] << 3) & 0x78);
	buttons = param[1];

	if (!model || !buttons)
		return -1;

	model_info = get_model_info(model);
	if (model_info) {

/*
 * Do Logitech PS2++ / PS2T++ magic init.
 */
		if (model_info->kind == PS2PP_KIND_TP3) { /* Touch Pad 3 */

			/* Unprotect RAM */
			param[0] = 0x11; param[1] = 0x04; param[2] = 0x68;
			ps2_command(ps2dev, param, 0x30d1);
			/* Enable features */
			param[0] = 0x11; param[1] = 0x05; param[2] = 0x0b;
			ps2_command(ps2dev, param, 0x30d1);
			/* Enable PS2++ */
			param[0] = 0x11; param[1] = 0x09; param[2] = 0xc3;
			ps2_command(ps2dev, param, 0x30d1);

			param[0] = 0;
			if (!ps2_command(ps2dev, param, 0x13d1) &&
			    param[0] == 0x06 && param[1] == 0x00 && param[2] == 0x14) {
				use_ps2pp = true;
			}

		} else {

			param[0] = param[1] = param[2] = 0;
			ps2pp_cmd(psmouse, param, 0x39); /* Magic knock */
			ps2pp_cmd(psmouse, param, 0xDB);

			if ((param[0] & 0x78) == 0x48 &&
			    (param[1] & 0xf3) == 0xc2 &&
			    (param[2] & 0x03) == ((param[1] >> 2) & 3)) {
				ps2pp_set_smartscroll(psmouse, false);
				use_ps2pp = true;
			}
		}

	} else {
		psmouse_warn(psmouse, "Detected unknown Logitech mouse model %d\n", model);
	}

	if (set_properties) {
		psmouse->vendor = "Logitech";
		psmouse->model = model;

		if (use_ps2pp) {
			psmouse->protocol_handler = ps2pp_process_byte;
			psmouse->pktsize = 3;

			if (model_info->kind != PS2PP_KIND_TP3) {
				psmouse->set_resolution = ps2pp_set_resolution;
				psmouse->disconnect = ps2pp_disconnect;

				error = device_create_file(&psmouse->ps2dev.serio->dev,
							   &psmouse_attr_smartscroll.dattr);
				if (error) {
					psmouse_err(psmouse,
						    "failed to create smartscroll sysfs attribute, error: %d\n",
						    error);
					return -1;
				}
			}
		}

		if (buttons >= 3)
			__set_bit(BTN_MIDDLE, psmouse->dev->keybit);

		if (model_info)
			ps2pp_set_model_properties(psmouse, model_info, use_ps2pp);
	}

	return use_ps2pp ? 0 : -1;
}