summaryrefslogtreecommitdiffstats
path: root/drivers/input/rmi4/rmi_f12.c
blob: 8b0db086d68a9361e622bd680e021b9251c17562 (plain)
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
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
/*
 * Copyright (c) 2012-2016 Synaptics Incorporated
 *
 * 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/input/mt.h>
#include <linux/rmi.h>
#include "rmi_driver.h"
#include "rmi_2d_sensor.h"

enum rmi_f12_object_type {
	RMI_F12_OBJECT_NONE			= 0x00,
	RMI_F12_OBJECT_FINGER			= 0x01,
	RMI_F12_OBJECT_STYLUS			= 0x02,
	RMI_F12_OBJECT_PALM			= 0x03,
	RMI_F12_OBJECT_UNCLASSIFIED		= 0x04,
	RMI_F12_OBJECT_GLOVED_FINGER		= 0x06,
	RMI_F12_OBJECT_NARROW_OBJECT		= 0x07,
	RMI_F12_OBJECT_HAND_EDGE		= 0x08,
	RMI_F12_OBJECT_COVER			= 0x0A,
	RMI_F12_OBJECT_STYLUS_2			= 0x0B,
	RMI_F12_OBJECT_ERASER			= 0x0C,
	RMI_F12_OBJECT_SMALL_OBJECT		= 0x0D,
};

#define F12_DATA1_BYTES_PER_OBJ			8

struct f12_data {
	struct rmi_2d_sensor sensor;
	struct rmi_2d_sensor_platform_data sensor_pdata;
	bool has_dribble;

	u16 data_addr;

	struct rmi_register_descriptor query_reg_desc;
	struct rmi_register_descriptor control_reg_desc;
	struct rmi_register_descriptor data_reg_desc;

	/* F12 Data1 describes sensed objects */
	const struct rmi_register_desc_item *data1;
	u16 data1_offset;

	/* F12 Data5 describes finger ACM */
	const struct rmi_register_desc_item *data5;
	u16 data5_offset;

	/* F12 Data5 describes Pen */
	const struct rmi_register_desc_item *data6;
	u16 data6_offset;


	/* F12 Data9 reports relative data */
	const struct rmi_register_desc_item *data9;
	u16 data9_offset;

	const struct rmi_register_desc_item *data15;
	u16 data15_offset;
};

static int rmi_f12_read_sensor_tuning(struct f12_data *f12)
{
	const struct rmi_register_desc_item *item;
	struct rmi_2d_sensor *sensor = &f12->sensor;
	struct rmi_function *fn = sensor->fn;
	struct rmi_device *rmi_dev = fn->rmi_dev;
	int ret;
	int offset;
	u8 buf[15];
	int pitch_x = 0;
	int pitch_y = 0;
	int rx_receivers = 0;
	int tx_receivers = 0;
	int sensor_flags = 0;

	item = rmi_get_register_desc_item(&f12->control_reg_desc, 8);
	if (!item) {
		dev_err(&fn->dev,
			"F12 does not have the sensor tuning control register\n");
		return -ENODEV;
	}

	offset = rmi_register_desc_calc_reg_offset(&f12->control_reg_desc, 8);

	if (item->reg_size > sizeof(buf)) {
		dev_err(&fn->dev,
			"F12 control8 should be no bigger than %zd bytes, not: %ld\n",
			sizeof(buf), item->reg_size);
		return -ENODEV;
	}

	ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + offset, buf,
				item->reg_size);
	if (ret)
		return ret;

	offset = 0;
	if (rmi_register_desc_has_subpacket(item, 0)) {
		sensor->max_x = (buf[offset + 1] << 8) | buf[offset];
		sensor->max_y = (buf[offset + 3] << 8) | buf[offset + 2];
		offset += 4;
	}

	rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: max_x: %d max_y: %d\n", __func__,
		sensor->max_x, sensor->max_y);

	if (rmi_register_desc_has_subpacket(item, 1)) {
		pitch_x = (buf[offset + 1] << 8) | buf[offset];
		pitch_y	= (buf[offset + 3] << 8) | buf[offset + 2];
		offset += 4;
	}

	if (rmi_register_desc_has_subpacket(item, 2)) {
		/* Units 1/128 sensor pitch */
		rmi_dbg(RMI_DEBUG_FN, &fn->dev,
			"%s: Inactive Border xlo:%d xhi:%d ylo:%d yhi:%d\n",
			__func__,
			buf[offset], buf[offset + 1],
			buf[offset + 2], buf[offset + 3]);

		offset += 4;
	}

	if (rmi_register_desc_has_subpacket(item, 3)) {
		rx_receivers = buf[offset];
		tx_receivers = buf[offset + 1];
		offset += 2;
	}

	if (rmi_register_desc_has_subpacket(item, 4)) {
		sensor_flags = buf[offset];
		offset += 1;
	}

	sensor->x_mm = (pitch_x * rx_receivers) >> 12;
	sensor->y_mm = (pitch_y * tx_receivers) >> 12;

	rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x_mm: %d y_mm: %d\n", __func__,
		sensor->x_mm, sensor->y_mm);

	return 0;
}

static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1, int size)
{
	int i;
	struct rmi_2d_sensor *sensor = &f12->sensor;
	int objects = f12->data1->num_subpackets;

	if ((f12->data1->num_subpackets * F12_DATA1_BYTES_PER_OBJ) > size)
		objects = size / F12_DATA1_BYTES_PER_OBJ;

	for (i = 0; i < objects; i++) {
		struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i];

		obj->type = RMI_2D_OBJECT_NONE;
		obj->mt_tool = MT_TOOL_FINGER;

		switch (data1[0]) {
		case RMI_F12_OBJECT_FINGER:
			obj->type = RMI_2D_OBJECT_FINGER;
			break;
		case RMI_F12_OBJECT_STYLUS:
			obj->type = RMI_2D_OBJECT_STYLUS;
			obj->mt_tool = MT_TOOL_PEN;
			break;
		case RMI_F12_OBJECT_PALM:
			obj->type = RMI_2D_OBJECT_PALM;
			obj->mt_tool = MT_TOOL_PALM;
			break;
		case RMI_F12_OBJECT_UNCLASSIFIED:
			obj->type = RMI_2D_OBJECT_UNCLASSIFIED;
			break;
		}

		obj->x = (data1[2] << 8) | data1[1];
		obj->y = (data1[4] << 8) | data1[3];
		obj->z = data1[5];
		obj->wx = data1[6];
		obj->wy = data1[7];

		rmi_2d_sensor_abs_process(sensor, obj, i);

		data1 += F12_DATA1_BYTES_PER_OBJ;
	}

	if (sensor->kernel_tracking)
		input_mt_assign_slots(sensor->input,
				      sensor->tracking_slots,
				      sensor->tracking_pos,
				      sensor->nbr_fingers,
				      sensor->dmax);

	for (i = 0; i < objects; i++)
		rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i);
}

static int rmi_f12_attention(struct rmi_function *fn,
			     unsigned long *irq_nr_regs)
{
	int retval;
	struct rmi_device *rmi_dev = fn->rmi_dev;
	struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
	struct f12_data *f12 = dev_get_drvdata(&fn->dev);
	struct rmi_2d_sensor *sensor = &f12->sensor;
	int valid_bytes = sensor->pkt_size;

	if (drvdata->attn_data.data) {
		if (sensor->attn_size > drvdata->attn_data.size)
			valid_bytes = drvdata->attn_data.size;
		else
			valid_bytes = sensor->attn_size;
		memcpy(sensor->data_pkt, drvdata->attn_data.data,
			valid_bytes);
		drvdata->attn_data.data += sensor->attn_size;
		drvdata->attn_data.size -= sensor->attn_size;
	} else {
		retval = rmi_read_block(rmi_dev, f12->data_addr,
					sensor->data_pkt, sensor->pkt_size);
		if (retval < 0) {
			dev_err(&fn->dev, "Failed to read object data. Code: %d.\n",
				retval);
			return retval;
		}
	}

	if (f12->data1)
		rmi_f12_process_objects(f12,
			&sensor->data_pkt[f12->data1_offset], valid_bytes);

	input_mt_sync_frame(sensor->input);

	return 0;
}

static int rmi_f12_write_control_regs(struct rmi_function *fn)
{
	int ret;
	const struct rmi_register_desc_item *item;
	struct rmi_device *rmi_dev = fn->rmi_dev;
	struct f12_data *f12 = dev_get_drvdata(&fn->dev);
	int control_size;
	char buf[3];
	u16 control_offset = 0;
	u8 subpacket_offset = 0;

	if (f12->has_dribble
	    && (f12->sensor.dribble != RMI_REG_STATE_DEFAULT)) {
		item = rmi_get_register_desc_item(&f12->control_reg_desc, 20);
		if (item) {
			control_offset = rmi_register_desc_calc_reg_offset(
						&f12->control_reg_desc, 20);

			/*
			 * The byte containing the EnableDribble bit will be
			 * in either byte 0 or byte 2 of control 20. Depending
			 * on the existence of subpacket 0. If control 20 is
			 * larger then 3 bytes, just read the first 3.
			 */
			control_size = min(item->reg_size, 3UL);

			ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr
					+ control_offset, buf, control_size);
			if (ret)
				return ret;

			if (rmi_register_desc_has_subpacket(item, 0))
				subpacket_offset += 1;

			switch (f12->sensor.dribble) {
			case RMI_REG_STATE_OFF:
				buf[subpacket_offset] &= ~BIT(2);
				break;
			case RMI_REG_STATE_ON:
				buf[subpacket_offset] |= BIT(2);
				break;
			case RMI_REG_STATE_DEFAULT:
			default:
				break;
			}

			ret = rmi_write_block(rmi_dev,
				fn->fd.control_base_addr + control_offset,
				buf, control_size);
			if (ret)
				return ret;
		}
	}

	return 0;

}

static int rmi_f12_config(struct rmi_function *fn)
{
	struct rmi_driver *drv = fn->rmi_dev->driver;
	int ret;

	drv->set_irq_bits(fn->rmi_dev, fn->irq_mask);

	ret = rmi_f12_write_control_regs(fn);
	if (ret)
		dev_warn(&fn->dev,
			"Failed to write F12 control registers: %d\n", ret);

	return 0;
}

static int rmi_f12_probe(struct rmi_function *fn)
{
	struct f12_data *f12;
	int ret;
	struct rmi_device *rmi_dev = fn->rmi_dev;
	char buf;
	u16 query_addr = fn->fd.query_base_addr;
	const struct rmi_register_desc_item *item;
	struct rmi_2d_sensor *sensor;
	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
	struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
	u16 data_offset = 0;

	rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s\n", __func__);

	ret = rmi_read(fn->rmi_dev, query_addr, &buf);
	if (ret < 0) {
		dev_err(&fn->dev, "Failed to read general info register: %d\n",
			ret);
		return -ENODEV;
	}
	++query_addr;

	if (!(buf & BIT(0))) {
		dev_err(&fn->dev,
			"Behavior of F12 without register descriptors is undefined.\n");
		return -ENODEV;
	}

	f12 = devm_kzalloc(&fn->dev, sizeof(struct f12_data), GFP_KERNEL);
	if (!f12)
		return -ENOMEM;

	f12->has_dribble = !!(buf & BIT(3));

	if (fn->dev.of_node) {
		ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata);
		if (ret)
			return ret;
	} else {
		f12->sensor_pdata = pdata->sensor_pdata;
	}

	ret = rmi_read_register_desc(rmi_dev, query_addr,
					&f12->query_reg_desc);
	if (ret) {
		dev_err(&fn->dev,
			"Failed to read the Query Register Descriptor: %d\n",
			ret);
		return ret;
	}
	query_addr += 3;

	ret = rmi_read_register_desc(rmi_dev, query_addr,
						&f12->control_reg_desc);
	if (ret) {
		dev_err(&fn->dev,
			"Failed to read the Control Register Descriptor: %d\n",
			ret);
		return ret;
	}
	query_addr += 3;

	ret = rmi_read_register_desc(rmi_dev, query_addr,
						&f12->data_reg_desc);
	if (ret) {
		dev_err(&fn->dev,
			"Failed to read the Data Register Descriptor: %d\n",
			ret);
		return ret;
	}
	query_addr += 3;

	sensor = &f12->sensor;
	sensor->fn = fn;
	f12->data_addr = fn->fd.data_base_addr;
	sensor->pkt_size = rmi_register_desc_calc_size(&f12->data_reg_desc);

	sensor->axis_align =
		f12->sensor_pdata.axis_align;

	sensor->x_mm = f12->sensor_pdata.x_mm;
	sensor->y_mm = f12->sensor_pdata.y_mm;
	sensor->dribble = f12->sensor_pdata.dribble;

	if (sensor->sensor_type == rmi_sensor_default)
		sensor->sensor_type =
			f12->sensor_pdata.sensor_type;

	rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: data packet size: %d\n", __func__,
		sensor->pkt_size);
	sensor->data_pkt = devm_kzalloc(&fn->dev, sensor->pkt_size, GFP_KERNEL);
	if (!sensor->data_pkt)
		return -ENOMEM;

	dev_set_drvdata(&fn->dev, f12);

	ret = rmi_f12_read_sensor_tuning(f12);
	if (ret)
		return ret;

	/*
	 * Figure out what data is contained in the data registers. HID devices
	 * may have registers defined, but their data is not reported in the
	 * HID attention report. Registers which are not reported in the HID
	 * attention report check to see if the device is receiving data from
	 * HID attention reports.
	 */
	item = rmi_get_register_desc_item(&f12->data_reg_desc, 0);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 1);
	if (item) {
		f12->data1 = item;
		f12->data1_offset = data_offset;
		data_offset += item->reg_size;
		sensor->nbr_fingers = item->num_subpackets;
		sensor->report_abs = 1;
		sensor->attn_size += item->reg_size;
	}

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 2);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 3);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 4);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 5);
	if (item) {
		f12->data5 = item;
		f12->data5_offset = data_offset;
		data_offset += item->reg_size;
		sensor->attn_size += item->reg_size;
	}

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 6);
	if (item && !drvdata->attn_data.data) {
		f12->data6 = item;
		f12->data6_offset = data_offset;
		data_offset += item->reg_size;
	}

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 7);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 8);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 9);
	if (item && !drvdata->attn_data.data) {
		f12->data9 = item;
		f12->data9_offset = data_offset;
		data_offset += item->reg_size;
		if (!sensor->report_abs)
			sensor->report_rel = 1;
	}

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 10);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 11);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 12);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 13);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 14);
	if (item && !drvdata->attn_data.data)
		data_offset += item->reg_size;

	item = rmi_get_register_desc_item(&f12->data_reg_desc, 15);
	if (item && !drvdata->attn_data.data) {
		f12->data15 = item;
		f12->data15_offset = data_offset;
		data_offset += item->reg_size;
	}

	/* allocate the in-kernel tracking buffers */
	sensor->tracking_pos = devm_kzalloc(&fn->dev,
			sizeof(struct input_mt_pos) * sensor->nbr_fingers,
			GFP_KERNEL);
	sensor->tracking_slots = devm_kzalloc(&fn->dev,
			sizeof(int) * sensor->nbr_fingers, GFP_KERNEL);
	sensor->objs = devm_kzalloc(&fn->dev,
			sizeof(struct rmi_2d_sensor_abs_object)
			* sensor->nbr_fingers, GFP_KERNEL);
	if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs)
		return -ENOMEM;

	ret = rmi_2d_sensor_configure_input(fn, sensor);
	if (ret)
		return ret;

	return 0;
}

struct rmi_function_handler rmi_f12_handler = {
	.driver = {
		.name = "rmi4_f12",
	},
	.func = 0x12,
	.probe = rmi_f12_probe,
	.config = rmi_f12_config,
	.attention = rmi_f12_attention,
};
OpenPOWER on IntegriCloud