1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
4  */
5 
6 #include <linux/kernel.h>
7 #include <linux/hid.h>
8 #include <linux/input.h>
9 #include <linux/input/mt.h>
10 #include <linux/module.h>
11 #include <asm/unaligned.h>
12 #include "hid-ids.h"
13 
14 /* ALPS Device Product ID */
15 #define HID_PRODUCT_ID_T3_BTNLESS	0xD0C0
16 #define HID_PRODUCT_ID_COSMO		0x1202
17 #define HID_PRODUCT_ID_U1_PTP_1		0x1207
18 #define HID_PRODUCT_ID_U1			0x1209
19 #define HID_PRODUCT_ID_U1_PTP_2		0x120A
20 #define HID_PRODUCT_ID_U1_DUAL		0x120B
21 #define HID_PRODUCT_ID_T4_BTNLESS	0x120C
22 
23 #define DEV_SINGLEPOINT				0x01
24 #define DEV_DUALPOINT				0x02
25 
26 #define U1_MOUSE_REPORT_ID			0x01 /* Mouse data ReportID */
27 #define U1_ABSOLUTE_REPORT_ID		0x03 /* Absolute data ReportID */
28 #define U1_ABSOLUTE_REPORT_ID_SECD  0x02 /* FW-PTP Absolute data ReportID */
29 #define U1_FEATURE_REPORT_ID		0x05 /* Feature ReportID */
30 #define U1_SP_ABSOLUTE_REPORT_ID	0x06 /* Feature ReportID */
31 
32 #define U1_FEATURE_REPORT_LEN		0x08 /* Feature Report Length */
33 #define U1_FEATURE_REPORT_LEN_ALL	0x0A
34 #define U1_CMD_REGISTER_READ		0xD1
35 #define U1_CMD_REGISTER_WRITE		0xD2
36 
37 #define	U1_DEVTYPE_SP_SUPPORT		0x10 /* SP Support */
38 #define	U1_DISABLE_DEV				0x01
39 #define U1_TP_ABS_MODE				0x02
40 #define	U1_SP_ABS_MODE				0x80
41 
42 #define ADDRESS_U1_DEV_CTRL_1	0x00800040
43 #define ADDRESS_U1_DEVICE_TYP	0x00800043
44 #define ADDRESS_U1_NUM_SENS_X	0x00800047
45 #define ADDRESS_U1_NUM_SENS_Y	0x00800048
46 #define ADDRESS_U1_PITCH_SENS_X	0x00800049
47 #define ADDRESS_U1_PITCH_SENS_Y	0x0080004A
48 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
49 #define ADDRESS_U1_PAD_BTN		0x00800052
50 #define ADDRESS_U1_SP_BTN		0x0080009F
51 
52 #define T4_INPUT_REPORT_LEN			sizeof(struct t4_input_report)
53 #define T4_FEATURE_REPORT_LEN		T4_INPUT_REPORT_LEN
54 #define T4_FEATURE_REPORT_ID		7
55 #define T4_CMD_REGISTER_READ			0x08
56 #define T4_CMD_REGISTER_WRITE			0x07
57 
58 #define T4_ADDRESS_BASE				0xC2C0
59 #define PRM_SYS_CONFIG_1			(T4_ADDRESS_BASE + 0x0002)
60 #define T4_PRM_FEED_CONFIG_1		(T4_ADDRESS_BASE + 0x0004)
61 #define T4_PRM_FEED_CONFIG_4		(T4_ADDRESS_BASE + 0x001A)
62 #define T4_PRM_ID_CONFIG_3			(T4_ADDRESS_BASE + 0x00B0)
63 
64 
65 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE			0x01
66 #define T4_I2C_ABS	0x78
67 
68 #define T4_COUNT_PER_ELECTRODE		256
69 #define MAX_TOUCHES	5
70 
71 enum dev_num {
72 	U1,
73 	T4,
74 	UNKNOWN,
75 };
76 /**
77  * struct alps_dev
78  *
79  * @input: pointer to the kernel input device
80  * @input2: pointer to the kernel input2 device
81  * @hdev: pointer to the struct hid_device
82  *
83  * @dev_type: device type
84  * @max_fingers: total number of fingers
85  * @has_sp: boolean of sp existense
86  * @sp_btn_info: button information
87  * @x_active_len_mm: active area length of X (mm)
88  * @y_active_len_mm: active area length of Y (mm)
89  * @x_max: maximum x coordinate value
90  * @y_max: maximum y coordinate value
91  * @x_min: minimum x coordinate value
92  * @y_min: minimum y coordinate value
93  * @btn_cnt: number of buttons
94  * @sp_btn_cnt: number of stick buttons
95  */
96 struct alps_dev {
97 	struct input_dev *input;
98 	struct input_dev *input2;
99 	struct hid_device *hdev;
100 
101 	enum dev_num dev_type;
102 	u8  max_fingers;
103 	u8  has_sp;
104 	u8	sp_btn_info;
105 	u32	x_active_len_mm;
106 	u32	y_active_len_mm;
107 	u32	x_max;
108 	u32	y_max;
109 	u32	x_min;
110 	u32	y_min;
111 	u32	btn_cnt;
112 	u32	sp_btn_cnt;
113 };
114 
115 struct t4_contact_data {
116 	u8  palm;
117 	u8	x_lo;
118 	u8	x_hi;
119 	u8	y_lo;
120 	u8	y_hi;
121 };
122 
123 struct t4_input_report {
124 	u8  reportID;
125 	u8  numContacts;
126 	struct t4_contact_data contact[5];
127 	u8  button;
128 	u8  track[5];
129 	u8  zx[5], zy[5];
130 	u8  palmTime[5];
131 	u8  kilroy;
132 	u16 timeStamp;
133 };
134 
t4_calc_check_sum(u8 * buffer,unsigned long offset,unsigned long length)135 static u16 t4_calc_check_sum(u8 *buffer,
136 		unsigned long offset, unsigned long length)
137 {
138 	u16 sum1 = 0xFF, sum2 = 0xFF;
139 	unsigned long i = 0;
140 
141 	if (offset + length >= 50)
142 		return 0;
143 
144 	while (length > 0) {
145 		u32 tlen = length > 20 ? 20 : length;
146 
147 		length -= tlen;
148 
149 		do {
150 			sum1 += buffer[offset + i];
151 			sum2 += sum1;
152 			i++;
153 		} while (--tlen > 0);
154 
155 		sum1 = (sum1 & 0xFF) + (sum1 >> 8);
156 		sum2 = (sum2 & 0xFF) + (sum2 >> 8);
157 	}
158 
159 	sum1 = (sum1 & 0xFF) + (sum1 >> 8);
160 	sum2 = (sum2 & 0xFF) + (sum2 >> 8);
161 
162 	return(sum2 << 8 | sum1);
163 }
164 
t4_read_write_register(struct hid_device * hdev,u32 address,u8 * read_val,u8 write_val,bool read_flag)165 static int t4_read_write_register(struct hid_device *hdev, u32 address,
166 	u8 *read_val, u8 write_val, bool read_flag)
167 {
168 	int ret;
169 	u16 check_sum;
170 	u8 *input;
171 	u8 *readbuf = NULL;
172 
173 	input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
174 	if (!input)
175 		return -ENOMEM;
176 
177 	input[0] = T4_FEATURE_REPORT_ID;
178 	if (read_flag) {
179 		input[1] = T4_CMD_REGISTER_READ;
180 		input[8] = 0x00;
181 	} else {
182 		input[1] = T4_CMD_REGISTER_WRITE;
183 		input[8] = write_val;
184 	}
185 	put_unaligned_le32(address, input + 2);
186 	input[6] = 1;
187 	input[7] = 0;
188 
189 	/* Calculate the checksum */
190 	check_sum = t4_calc_check_sum(input, 1, 8);
191 	input[9] = (u8)check_sum;
192 	input[10] = (u8)(check_sum >> 8);
193 	input[11] = 0;
194 
195 	ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
196 			T4_FEATURE_REPORT_LEN,
197 			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
198 
199 	if (ret < 0) {
200 		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
201 		goto exit;
202 	}
203 
204 	if (read_flag) {
205 		readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
206 		if (!readbuf) {
207 			ret = -ENOMEM;
208 			goto exit;
209 		}
210 
211 		ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
212 				T4_FEATURE_REPORT_LEN,
213 				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
214 		if (ret < 0) {
215 			dev_err(&hdev->dev, "failed read register (%d)\n", ret);
216 			goto exit_readbuf;
217 		}
218 
219 		ret = -EINVAL;
220 
221 		if (*(u32 *)&readbuf[6] != address) {
222 			dev_err(&hdev->dev, "read register address error (%x,%x)\n",
223 				*(u32 *)&readbuf[6], address);
224 			goto exit_readbuf;
225 		}
226 
227 		if (*(u16 *)&readbuf[10] != 1) {
228 			dev_err(&hdev->dev, "read register size error (%x)\n",
229 				*(u16 *)&readbuf[10]);
230 			goto exit_readbuf;
231 		}
232 
233 		check_sum = t4_calc_check_sum(readbuf, 6, 7);
234 		if (*(u16 *)&readbuf[13] != check_sum) {
235 			dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
236 				*(u16 *)&readbuf[13], check_sum);
237 			goto exit_readbuf;
238 		}
239 
240 		*read_val = readbuf[12];
241 	}
242 
243 	ret = 0;
244 
245 exit_readbuf:
246 	kfree(readbuf);
247 exit:
248 	kfree(input);
249 	return ret;
250 }
251 
u1_read_write_register(struct hid_device * hdev,u32 address,u8 * read_val,u8 write_val,bool read_flag)252 static int u1_read_write_register(struct hid_device *hdev, u32 address,
253 	u8 *read_val, u8 write_val, bool read_flag)
254 {
255 	int ret, i;
256 	u8 check_sum;
257 	u8 *input;
258 	u8 *readbuf;
259 
260 	input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
261 	if (!input)
262 		return -ENOMEM;
263 
264 	input[0] = U1_FEATURE_REPORT_ID;
265 	if (read_flag) {
266 		input[1] = U1_CMD_REGISTER_READ;
267 		input[6] = 0x00;
268 	} else {
269 		input[1] = U1_CMD_REGISTER_WRITE;
270 		input[6] = write_val;
271 	}
272 
273 	put_unaligned_le32(address, input + 2);
274 
275 	/* Calculate the checksum */
276 	check_sum = U1_FEATURE_REPORT_LEN_ALL;
277 	for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
278 		check_sum += input[i];
279 
280 	input[7] = check_sum;
281 	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
282 			U1_FEATURE_REPORT_LEN,
283 			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
284 
285 	if (ret < 0) {
286 		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
287 		goto exit;
288 	}
289 
290 	if (read_flag) {
291 		readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
292 		if (!readbuf) {
293 			ret = -ENOMEM;
294 			goto exit;
295 		}
296 
297 		ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
298 				U1_FEATURE_REPORT_LEN,
299 				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
300 
301 		if (ret < 0) {
302 			dev_err(&hdev->dev, "failed read register (%d)\n", ret);
303 			kfree(readbuf);
304 			goto exit;
305 		}
306 
307 		*read_val = readbuf[6];
308 
309 		kfree(readbuf);
310 	}
311 
312 	ret = 0;
313 
314 exit:
315 	kfree(input);
316 	return ret;
317 }
318 
t4_raw_event(struct alps_dev * hdata,u8 * data,int size)319 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
320 {
321 	unsigned int x, y, z;
322 	int i;
323 	struct t4_input_report *p_report = (struct t4_input_report *)data;
324 
325 	if (!data)
326 		return 0;
327 	for (i = 0; i < hdata->max_fingers; i++) {
328 		x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
329 		y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
330 		y = hdata->y_max - y + hdata->y_min;
331 		z = (p_report->contact[i].palm < 0x80 &&
332 			p_report->contact[i].palm > 0) * 62;
333 		if (x == 0xffff) {
334 			x = 0;
335 			y = 0;
336 			z = 0;
337 		}
338 		input_mt_slot(hdata->input, i);
339 
340 		input_mt_report_slot_state(hdata->input,
341 			MT_TOOL_FINGER, z != 0);
342 
343 		if (!z)
344 			continue;
345 
346 		input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
347 		input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
348 		input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
349 	}
350 	input_mt_sync_frame(hdata->input);
351 
352 	input_report_key(hdata->input, BTN_LEFT, p_report->button);
353 
354 	input_sync(hdata->input);
355 	return 1;
356 }
357 
u1_raw_event(struct alps_dev * hdata,u8 * data,int size)358 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
359 {
360 	unsigned int x, y, z;
361 	int i;
362 	short sp_x, sp_y;
363 
364 	if (!data)
365 		return 0;
366 	switch (data[0]) {
367 	case U1_MOUSE_REPORT_ID:
368 		break;
369 	case U1_FEATURE_REPORT_ID:
370 		break;
371 	case U1_ABSOLUTE_REPORT_ID:
372 	case U1_ABSOLUTE_REPORT_ID_SECD:
373 		for (i = 0; i < hdata->max_fingers; i++) {
374 			u8 *contact = &data[i * 5];
375 
376 			x = get_unaligned_le16(contact + 3);
377 			y = get_unaligned_le16(contact + 5);
378 			z = contact[7] & 0x7F;
379 
380 			input_mt_slot(hdata->input, i);
381 
382 			if (z != 0) {
383 				input_mt_report_slot_state(hdata->input,
384 					MT_TOOL_FINGER, 1);
385 				input_report_abs(hdata->input,
386 					ABS_MT_POSITION_X, x);
387 				input_report_abs(hdata->input,
388 					ABS_MT_POSITION_Y, y);
389 				input_report_abs(hdata->input,
390 					ABS_MT_PRESSURE, z);
391 			} else {
392 				input_mt_report_slot_inactive(hdata->input);
393 			}
394 		}
395 
396 		input_mt_sync_frame(hdata->input);
397 
398 		input_report_key(hdata->input, BTN_LEFT,
399 			data[1] & 0x1);
400 		input_report_key(hdata->input, BTN_RIGHT,
401 			(data[1] & 0x2));
402 		input_report_key(hdata->input, BTN_MIDDLE,
403 			(data[1] & 0x4));
404 
405 		input_sync(hdata->input);
406 
407 		return 1;
408 
409 	case U1_SP_ABSOLUTE_REPORT_ID:
410 		sp_x = get_unaligned_le16(data+2);
411 		sp_y = get_unaligned_le16(data+4);
412 
413 		sp_x = sp_x / 8;
414 		sp_y = sp_y / 8;
415 
416 		input_report_rel(hdata->input2, REL_X, sp_x);
417 		input_report_rel(hdata->input2, REL_Y, sp_y);
418 
419 		input_report_key(hdata->input2, BTN_LEFT,
420 			data[1] & 0x1);
421 		input_report_key(hdata->input2, BTN_RIGHT,
422 			(data[1] & 0x2));
423 		input_report_key(hdata->input2, BTN_MIDDLE,
424 			(data[1] & 0x4));
425 
426 		input_sync(hdata->input2);
427 
428 		return 1;
429 	}
430 
431 	return 0;
432 }
433 
alps_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)434 static int alps_raw_event(struct hid_device *hdev,
435 		struct hid_report *report, u8 *data, int size)
436 {
437 	int ret = 0;
438 	struct alps_dev *hdata = hid_get_drvdata(hdev);
439 
440 	switch (hdev->product) {
441 	case HID_PRODUCT_ID_T4_BTNLESS:
442 		ret = t4_raw_event(hdata, data, size);
443 		break;
444 	default:
445 		ret = u1_raw_event(hdata, data, size);
446 		break;
447 	}
448 	return ret;
449 }
450 
alps_post_reset(struct hid_device * hdev)451 static int __maybe_unused alps_post_reset(struct hid_device *hdev)
452 {
453 	int ret = -1;
454 	struct alps_dev *data = hid_get_drvdata(hdev);
455 
456 	switch (data->dev_type) {
457 	case T4:
458 		ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
459 			NULL, T4_I2C_ABS, false);
460 		if (ret < 0) {
461 			dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
462 				ret);
463 			goto exit;
464 		}
465 
466 		ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
467 			NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
468 		if (ret < 0) {
469 			dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
470 				ret);
471 			goto exit;
472 		}
473 		break;
474 	case U1:
475 		ret = u1_read_write_register(hdev,
476 			ADDRESS_U1_DEV_CTRL_1, NULL,
477 			U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
478 		if (ret < 0) {
479 			dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
480 				ret);
481 			goto exit;
482 		}
483 		break;
484 	default:
485 		break;
486 	}
487 
488 exit:
489 	return ret;
490 }
491 
alps_post_resume(struct hid_device * hdev)492 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
493 {
494 	return alps_post_reset(hdev);
495 }
496 
u1_init(struct hid_device * hdev,struct alps_dev * pri_data)497 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
498 {
499 	int ret;
500 	u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
501 	u8 pitch_x, pitch_y, resolution;
502 
503 	/* Device initialization */
504 	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
505 			&dev_ctrl, 0, true);
506 	if (ret < 0) {
507 		dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
508 		goto exit;
509 	}
510 
511 	dev_ctrl &= ~U1_DISABLE_DEV;
512 	dev_ctrl |= U1_TP_ABS_MODE;
513 	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
514 			NULL, dev_ctrl, false);
515 	if (ret < 0) {
516 		dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
517 		goto exit;
518 	}
519 
520 	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
521 			&sen_line_num_x, 0, true);
522 	if (ret < 0) {
523 		dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
524 		goto exit;
525 	}
526 
527 	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
528 			&sen_line_num_y, 0, true);
529 	if (ret < 0) {
530 		dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
531 		goto exit;
532 	}
533 
534 	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
535 			&pitch_x, 0, true);
536 	if (ret < 0) {
537 		dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
538 		goto exit;
539 	}
540 
541 	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
542 			&pitch_y, 0, true);
543 	if (ret < 0) {
544 		dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
545 		goto exit;
546 	}
547 
548 	ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
549 		&resolution, 0, true);
550 	if (ret < 0) {
551 		dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
552 		goto exit;
553 	}
554 	pri_data->x_active_len_mm =
555 		(pitch_x * (sen_line_num_x - 1)) / 10;
556 	pri_data->y_active_len_mm =
557 		(pitch_y * (sen_line_num_y - 1)) / 10;
558 
559 	pri_data->x_max =
560 		(resolution << 2) * (sen_line_num_x - 1);
561 	pri_data->x_min = 1;
562 	pri_data->y_max =
563 		(resolution << 2) * (sen_line_num_y - 1);
564 	pri_data->y_min = 1;
565 
566 	ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
567 			&tmp, 0, true);
568 	if (ret < 0) {
569 		dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
570 		goto exit;
571 	}
572 	if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
573 		pri_data->btn_cnt = (tmp & 0x0F);
574 	} else {
575 		/* Button pad */
576 		pri_data->btn_cnt = 1;
577 	}
578 
579 	pri_data->has_sp = 0;
580 	/* Check StickPointer device */
581 	ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
582 			&tmp, 0, true);
583 	if (ret < 0) {
584 		dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
585 		goto exit;
586 	}
587 	if (tmp & U1_DEVTYPE_SP_SUPPORT) {
588 		dev_ctrl |= U1_SP_ABS_MODE;
589 		ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
590 			NULL, dev_ctrl, false);
591 		if (ret < 0) {
592 			dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
593 			goto exit;
594 		}
595 
596 		ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
597 			&pri_data->sp_btn_info, 0, true);
598 		if (ret < 0) {
599 			dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
600 			goto exit;
601 		}
602 		pri_data->has_sp = 1;
603 	}
604 	pri_data->max_fingers = 5;
605 exit:
606 	return ret;
607 }
608 
T4_init(struct hid_device * hdev,struct alps_dev * pri_data)609 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
610 {
611 	int ret;
612 	u8 tmp, sen_line_num_x, sen_line_num_y;
613 
614 	ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
615 	if (ret < 0) {
616 		dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
617 		goto exit;
618 	}
619 	sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
620 	sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
621 
622 	pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
623 	pri_data->x_min = T4_COUNT_PER_ELECTRODE;
624 	pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
625 	pri_data->y_min = T4_COUNT_PER_ELECTRODE;
626 	pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
627 	pri_data->btn_cnt = 1;
628 
629 	ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
630 	if (ret < 0) {
631 		dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
632 		goto exit;
633 	}
634 	tmp |= 0x02;
635 	ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
636 	if (ret < 0) {
637 		dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
638 		goto exit;
639 	}
640 
641 	ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
642 					NULL, T4_I2C_ABS, false);
643 	if (ret < 0) {
644 		dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
645 		goto exit;
646 	}
647 
648 	ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
649 				T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
650 	if (ret < 0) {
651 		dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
652 		goto exit;
653 	}
654 	pri_data->max_fingers = 5;
655 	pri_data->has_sp = 0;
656 exit:
657 	return ret;
658 }
659 
alps_sp_open(struct input_dev * dev)660 static int alps_sp_open(struct input_dev *dev)
661 {
662 	struct hid_device *hid = input_get_drvdata(dev);
663 
664 	return hid_hw_open(hid);
665 }
666 
alps_sp_close(struct input_dev * dev)667 static void alps_sp_close(struct input_dev *dev)
668 {
669 	struct hid_device *hid = input_get_drvdata(dev);
670 
671 	hid_hw_close(hid);
672 }
673 
alps_input_configured(struct hid_device * hdev,struct hid_input * hi)674 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
675 {
676 	struct alps_dev *data = hid_get_drvdata(hdev);
677 	struct input_dev *input = hi->input, *input2;
678 	int ret;
679 	int res_x, res_y, i;
680 
681 	data->input = input;
682 
683 	hid_dbg(hdev, "Opening low level driver\n");
684 	ret = hid_hw_open(hdev);
685 	if (ret)
686 		return ret;
687 
688 	/* Allow incoming hid reports */
689 	hid_device_io_start(hdev);
690 	switch (data->dev_type) {
691 	case T4:
692 		ret = T4_init(hdev, data);
693 		break;
694 	case U1:
695 		ret = u1_init(hdev, data);
696 		break;
697 	default:
698 		break;
699 	}
700 
701 	if (ret)
702 		goto exit;
703 
704 	__set_bit(EV_ABS, input->evbit);
705 	input_set_abs_params(input, ABS_MT_POSITION_X,
706 						data->x_min, data->x_max, 0, 0);
707 	input_set_abs_params(input, ABS_MT_POSITION_Y,
708 						data->y_min, data->y_max, 0, 0);
709 
710 	if (data->x_active_len_mm && data->y_active_len_mm) {
711 		res_x = (data->x_max - 1) / data->x_active_len_mm;
712 		res_y = (data->y_max - 1) / data->y_active_len_mm;
713 
714 		input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
715 		input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
716 	}
717 
718 	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
719 
720 	input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
721 
722 	__set_bit(EV_KEY, input->evbit);
723 
724 	if (data->btn_cnt == 1)
725 		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
726 
727 	for (i = 0; i < data->btn_cnt; i++)
728 		__set_bit(BTN_LEFT + i, input->keybit);
729 
730 	/* Stick device initialization */
731 	if (data->has_sp) {
732 		input2 = input_allocate_device();
733 		if (!input2) {
734 			ret = -ENOMEM;
735 			goto exit;
736 		}
737 
738 		data->input2 = input2;
739 		input2->phys = input->phys;
740 		input2->name = "DualPoint Stick";
741 		input2->id.bustype = BUS_I2C;
742 		input2->id.vendor  = input->id.vendor;
743 		input2->id.product = input->id.product;
744 		input2->id.version = input->id.version;
745 		input2->dev.parent = input->dev.parent;
746 
747 		input_set_drvdata(input2, hdev);
748 		input2->open = alps_sp_open;
749 		input2->close = alps_sp_close;
750 
751 		__set_bit(EV_KEY, input2->evbit);
752 		data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
753 		for (i = 0; i < data->sp_btn_cnt; i++)
754 			__set_bit(BTN_LEFT + i, input2->keybit);
755 
756 		__set_bit(EV_REL, input2->evbit);
757 		__set_bit(REL_X, input2->relbit);
758 		__set_bit(REL_Y, input2->relbit);
759 		__set_bit(INPUT_PROP_POINTER, input2->propbit);
760 		__set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
761 
762 		if (input_register_device(data->input2)) {
763 			input_free_device(input2);
764 			ret = -ENOENT;
765 			goto exit;
766 		}
767 	}
768 
769 exit:
770 	hid_device_io_stop(hdev);
771 	hid_hw_close(hdev);
772 	return ret;
773 }
774 
alps_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)775 static int alps_input_mapping(struct hid_device *hdev,
776 		struct hid_input *hi, struct hid_field *field,
777 		struct hid_usage *usage, unsigned long **bit, int *max)
778 {
779 	return -1;
780 }
781 
alps_probe(struct hid_device * hdev,const struct hid_device_id * id)782 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
783 {
784 	struct alps_dev *data = NULL;
785 	int ret;
786 	data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
787 	if (!data)
788 		return -ENOMEM;
789 
790 	data->hdev = hdev;
791 	hid_set_drvdata(hdev, data);
792 
793 	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
794 
795 	ret = hid_parse(hdev);
796 	if (ret) {
797 		hid_err(hdev, "parse failed\n");
798 		return ret;
799 	}
800 
801 	switch (hdev->product) {
802 	case HID_DEVICE_ID_ALPS_T4_BTNLESS:
803 		data->dev_type = T4;
804 		break;
805 	case HID_DEVICE_ID_ALPS_U1_DUAL:
806 	case HID_DEVICE_ID_ALPS_U1:
807 	case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
808 		data->dev_type = U1;
809 		break;
810 	default:
811 		data->dev_type = UNKNOWN;
812 	}
813 
814 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
815 	if (ret) {
816 		hid_err(hdev, "hw start failed\n");
817 		return ret;
818 	}
819 
820 	return 0;
821 }
822 
alps_remove(struct hid_device * hdev)823 static void alps_remove(struct hid_device *hdev)
824 {
825 	hid_hw_stop(hdev);
826 }
827 
828 static const struct hid_device_id alps_id[] = {
829 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
830 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
831 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
832 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
833 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
834 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY) },
835 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
836 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
837 	{ }
838 };
839 MODULE_DEVICE_TABLE(hid, alps_id);
840 
841 static struct hid_driver alps_driver = {
842 	.name = "hid-alps",
843 	.id_table		= alps_id,
844 	.probe			= alps_probe,
845 	.remove			= alps_remove,
846 	.raw_event		= alps_raw_event,
847 	.input_mapping		= alps_input_mapping,
848 	.input_configured	= alps_input_configured,
849 #ifdef CONFIG_PM
850 	.resume			= alps_post_resume,
851 	.reset_resume		= alps_post_reset,
852 #endif
853 };
854 
855 module_hid_driver(alps_driver);
856 
857 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
858 MODULE_DESCRIPTION("ALPS HID driver");
859 MODULE_LICENSE("GPL");
860