1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core Source for:
4 * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
5 * For use with Cypress Txx3xx parts.
6 * Supported parts include:
7 * CY8CTST341
8 * CY8CTMA340
9 *
10 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
11 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
12 *
13 * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
14 */
15
16#include <linux/delay.h>
17#include <linux/input.h>
18#include <linux/input/mt.h>
19#include <linux/input/touchscreen.h>
20#include <linux/gpio.h>
21#include <linux/interrupt.h>
22#include <linux/slab.h>
23#include <linux/property.h>
24#include <linux/gpio/consumer.h>
25#include <linux/regulator/consumer.h>
26
27#include "cyttsp_core.h"
28
29/* Bootloader number of command keys */
30#define CY_NUM_BL_KEYS		8
31
32/* helpers */
33#define GET_NUM_TOUCHES(x)		((x) & 0x0F)
34#define IS_LARGE_AREA(x)		(((x) & 0x10) >> 4)
35#define IS_BAD_PKT(x)			((x) & 0x20)
36#define IS_VALID_APP(x)			((x) & 0x01)
37#define IS_OPERATIONAL_ERR(x)		((x) & 0x3F)
38#define GET_HSTMODE(reg)		(((reg) & 0x70) >> 4)
39#define GET_BOOTLOADERMODE(reg)		(((reg) & 0x10) >> 4)
40
41#define CY_REG_BASE			0x00
42#define CY_REG_ACT_DIST			0x1E
43#define CY_REG_ACT_INTRVL		0x1D
44#define CY_REG_TCH_TMOUT		(CY_REG_ACT_INTRVL + 1)
45#define CY_REG_LP_INTRVL		(CY_REG_TCH_TMOUT + 1)
46#define CY_MAXZ				255
47#define CY_DELAY_DFLT			20 /* ms */
48#define CY_DELAY_MAX			500
49/* Active distance in pixels for a gesture to be reported */
50#define CY_ACT_DIST_DFLT		0xF8 /* pixels */
51#define CY_ACT_DIST_MASK		0x0F
52/* Active Power state scanning/processing refresh interval */
53#define CY_ACT_INTRVL_DFLT		0x00 /* ms */
54/* Low Power state scanning/processing refresh interval */
55#define CY_LP_INTRVL_DFLT		0x0A /* ms */
56/* touch timeout for the Active power */
57#define CY_TCH_TMOUT_DFLT		0xFF /* ms */
58#define CY_HNDSHK_BIT			0x80
59/* device mode bits */
60#define CY_OPERATE_MODE			0x00
61#define CY_SYSINFO_MODE			0x10
62/* power mode select bits */
63#define CY_SOFT_RESET_MODE		0x01 /* return to Bootloader mode */
64#define CY_DEEP_SLEEP_MODE		0x02
65#define CY_LOW_POWER_MODE		0x04
66
67/* Slots management */
68#define CY_MAX_FINGER			4
69#define CY_MAX_ID			16
70
71static const u8 bl_command[] = {
72	0x00,			/* file offset */
73	0xFF,			/* command */
74	0xA5,			/* exit bootloader command */
75	0, 1, 2, 3, 4, 5, 6, 7	/* default keys */
76};
77
78static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
79				u8 length, void *buf)
80{
81	int error;
82	int tries;
83
84	for (tries = 0; tries < CY_NUM_RETRY; tries++) {
85		error = ts->bus_ops->read(ts->dev, ts->xfer_buf, command,
86				length, buf);
87		if (!error)
88			return 0;
89
90		msleep(CY_DELAY_DFLT);
91	}
92
93	return -EIO;
94}
95
96static int ttsp_write_block_data(struct cyttsp *ts, u8 command,
97				 u8 length, void *buf)
98{
99	int error;
100	int tries;
101
102	for (tries = 0; tries < CY_NUM_RETRY; tries++) {
103		error = ts->bus_ops->write(ts->dev, ts->xfer_buf, command,
104				length, buf);
105		if (!error)
106			return 0;
107
108		msleep(CY_DELAY_DFLT);
109	}
110
111	return -EIO;
112}
113
114static int ttsp_send_command(struct cyttsp *ts, u8 cmd)
115{
116	return ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
117}
118
119static int cyttsp_handshake(struct cyttsp *ts)
120{
121	if (ts->use_hndshk)
122		return ttsp_send_command(ts,
123				ts->xy_data.hst_mode ^ CY_HNDSHK_BIT);
124
125	return 0;
126}
127
128static int cyttsp_load_bl_regs(struct cyttsp *ts)
129{
130	memset(&ts->bl_data, 0, sizeof(ts->bl_data));
131	ts->bl_data.bl_status = 0x10;
132
133	return ttsp_read_block_data(ts, CY_REG_BASE,
134				    sizeof(ts->bl_data), &ts->bl_data);
135}
136
137static int cyttsp_exit_bl_mode(struct cyttsp *ts)
138{
139	int error;
140	u8 bl_cmd[sizeof(bl_command)];
141
142	memcpy(bl_cmd, bl_command, sizeof(bl_command));
143	if (ts->bl_keys)
144		memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
145			ts->bl_keys, CY_NUM_BL_KEYS);
146
147	error = ttsp_write_block_data(ts, CY_REG_BASE,
148				      sizeof(bl_cmd), bl_cmd);
149	if (error)
150		return error;
151
152	/* wait for TTSP Device to complete the operation */
153	msleep(CY_DELAY_DFLT);
154
155	error = cyttsp_load_bl_regs(ts);
156	if (error)
157		return error;
158
159	if (GET_BOOTLOADERMODE(ts->bl_data.bl_status))
160		return -EIO;
161
162	return 0;
163}
164
165static int cyttsp_set_operational_mode(struct cyttsp *ts)
166{
167	int error;
168
169	error = ttsp_send_command(ts, CY_OPERATE_MODE);
170	if (error)
171		return error;
172
173	/* wait for TTSP Device to complete switch to Operational mode */
174	error = ttsp_read_block_data(ts, CY_REG_BASE,
175				     sizeof(ts->xy_data), &ts->xy_data);
176	if (error)
177		return error;
178
179	error = cyttsp_handshake(ts);
180	if (error)
181		return error;
182
183	return ts->xy_data.act_dist == CY_ACT_DIST_DFLT ? -EIO : 0;
184}
185
186static int cyttsp_set_sysinfo_mode(struct cyttsp *ts)
187{
188	int error;
189
190	memset(&ts->sysinfo_data, 0, sizeof(ts->sysinfo_data));
191
192	/* switch to sysinfo mode */
193	error = ttsp_send_command(ts, CY_SYSINFO_MODE);
194	if (error)
195		return error;
196
197	/* read sysinfo registers */
198	msleep(CY_DELAY_DFLT);
199	error = ttsp_read_block_data(ts, CY_REG_BASE, sizeof(ts->sysinfo_data),
200				      &ts->sysinfo_data);
201	if (error)
202		return error;
203
204	error = cyttsp_handshake(ts);
205	if (error)
206		return error;
207
208	if (!ts->sysinfo_data.tts_verh && !ts->sysinfo_data.tts_verl)
209		return -EIO;
210
211	return 0;
212}
213
214static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
215{
216	int retval = 0;
217
218	if (ts->act_intrvl != CY_ACT_INTRVL_DFLT ||
219	    ts->tch_tmout != CY_TCH_TMOUT_DFLT ||
220	    ts->lp_intrvl != CY_LP_INTRVL_DFLT) {
221
222		u8 intrvl_ray[] = {
223			ts->act_intrvl,
224			ts->tch_tmout,
225			ts->lp_intrvl
226		};
227
228		/* set intrvl registers */
229		retval = ttsp_write_block_data(ts, CY_REG_ACT_INTRVL,
230					sizeof(intrvl_ray), intrvl_ray);
231		msleep(CY_DELAY_DFLT);
232	}
233
234	return retval;
235}
236
237static void cyttsp_hard_reset(struct cyttsp *ts)
238{
239	if (ts->reset_gpio) {
240		/*
241		 * According to the CY8CTMA340 datasheet page 21, the external
242		 * reset pulse width should be >= 1 ms. The datasheet does not
243		 * specify how long we have to wait after reset but a vendor
244		 * tree specifies 5 ms here.
245		 */
246		gpiod_set_value_cansleep(ts->reset_gpio, 1);
247		usleep_range(1000, 2000);
248		gpiod_set_value_cansleep(ts->reset_gpio, 0);
249		usleep_range(5000, 6000);
250	}
251}
252
253static int cyttsp_soft_reset(struct cyttsp *ts)
254{
255	int retval;
256
257	/* wait for interrupt to set ready completion */
258	reinit_completion(&ts->bl_ready);
259	ts->state = CY_BL_STATE;
260
261	enable_irq(ts->irq);
262
263	retval = ttsp_send_command(ts, CY_SOFT_RESET_MODE);
264	if (retval) {
265		dev_err(ts->dev, "failed to send soft reset\n");
266		goto out;
267	}
268
269	if (!wait_for_completion_timeout(&ts->bl_ready,
270			msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX))) {
271		dev_err(ts->dev, "timeout waiting for soft reset\n");
272		retval = -EIO;
273	}
274
275out:
276	ts->state = CY_IDLE_STATE;
277	disable_irq(ts->irq);
278	return retval;
279}
280
281static int cyttsp_act_dist_setup(struct cyttsp *ts)
282{
283	u8 act_dist_setup = ts->act_dist;
284
285	/* Init gesture; active distance setup */
286	return ttsp_write_block_data(ts, CY_REG_ACT_DIST,
287				sizeof(act_dist_setup), &act_dist_setup);
288}
289
290static void cyttsp_extract_track_ids(struct cyttsp_xydata *xy_data, int *ids)
291{
292	ids[0] = xy_data->touch12_id >> 4;
293	ids[1] = xy_data->touch12_id & 0xF;
294	ids[2] = xy_data->touch34_id >> 4;
295	ids[3] = xy_data->touch34_id & 0xF;
296}
297
298static const struct cyttsp_tch *cyttsp_get_tch(struct cyttsp_xydata *xy_data,
299					       int idx)
300{
301	switch (idx) {
302	case 0:
303		return &xy_data->tch1;
304	case 1:
305		return &xy_data->tch2;
306	case 2:
307		return &xy_data->tch3;
308	case 3:
309		return &xy_data->tch4;
310	default:
311		return NULL;
312	}
313}
314
315static void cyttsp_report_tchdata(struct cyttsp *ts)
316{
317	struct cyttsp_xydata *xy_data = &ts->xy_data;
318	struct input_dev *input = ts->input;
319	int num_tch = GET_NUM_TOUCHES(xy_data->tt_stat);
320	const struct cyttsp_tch *tch;
321	int ids[CY_MAX_ID];
322	int i;
323	DECLARE_BITMAP(used, CY_MAX_ID);
324
325	if (IS_LARGE_AREA(xy_data->tt_stat) == 1) {
326		/* terminate all active tracks */
327		num_tch = 0;
328		dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
329	} else if (num_tch > CY_MAX_FINGER) {
330		/* terminate all active tracks */
331		num_tch = 0;
332		dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__);
333	} else if (IS_BAD_PKT(xy_data->tt_mode)) {
334		/* terminate all active tracks */
335		num_tch = 0;
336		dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
337	}
338
339	cyttsp_extract_track_ids(xy_data, ids);
340
341	bitmap_zero(used, CY_MAX_ID);
342
343	for (i = 0; i < num_tch; i++) {
344		tch = cyttsp_get_tch(xy_data, i);
345
346		input_mt_slot(input, ids[i]);
347		input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
348		input_report_abs(input, ABS_MT_POSITION_X, be16_to_cpu(tch->x));
349		input_report_abs(input, ABS_MT_POSITION_Y, be16_to_cpu(tch->y));
350		input_report_abs(input, ABS_MT_TOUCH_MAJOR, tch->z);
351
352		__set_bit(ids[i], used);
353	}
354
355	for (i = 0; i < CY_MAX_ID; i++) {
356		if (test_bit(i, used))
357			continue;
358
359		input_mt_slot(input, i);
360		input_mt_report_slot_inactive(input);
361	}
362
363	input_sync(input);
364}
365
366static irqreturn_t cyttsp_irq(int irq, void *handle)
367{
368	struct cyttsp *ts = handle;
369	int error;
370
371	if (unlikely(ts->state == CY_BL_STATE)) {
372		complete(&ts->bl_ready);
373		goto out;
374	}
375
376	/* Get touch data from CYTTSP device */
377	error = ttsp_read_block_data(ts, CY_REG_BASE,
378				 sizeof(struct cyttsp_xydata), &ts->xy_data);
379	if (error)
380		goto out;
381
382	/* provide flow control handshake */
383	error = cyttsp_handshake(ts);
384	if (error)
385		goto out;
386
387	if (unlikely(ts->state == CY_IDLE_STATE))
388		goto out;
389
390	if (GET_BOOTLOADERMODE(ts->xy_data.tt_mode)) {
391		/*
392		 * TTSP device has reset back to bootloader mode.
393		 * Restore to operational mode.
394		 */
395		error = cyttsp_exit_bl_mode(ts);
396		if (error) {
397			dev_err(ts->dev,
398				"Could not return to operational mode, err: %d\n",
399				error);
400			ts->state = CY_IDLE_STATE;
401		}
402	} else {
403		cyttsp_report_tchdata(ts);
404	}
405
406out:
407	return IRQ_HANDLED;
408}
409
410static int cyttsp_power_on(struct cyttsp *ts)
411{
412	int error;
413
414	error = cyttsp_soft_reset(ts);
415	if (error)
416		return error;
417
418	error = cyttsp_load_bl_regs(ts);
419	if (error)
420		return error;
421
422	if (GET_BOOTLOADERMODE(ts->bl_data.bl_status) &&
423	    IS_VALID_APP(ts->bl_data.bl_status)) {
424		error = cyttsp_exit_bl_mode(ts);
425		if (error) {
426			dev_err(ts->dev, "failed to exit bootloader mode\n");
427			return error;
428		}
429	}
430
431	if (GET_HSTMODE(ts->bl_data.bl_file) != CY_OPERATE_MODE ||
432	    IS_OPERATIONAL_ERR(ts->bl_data.bl_status)) {
433		return -ENODEV;
434	}
435
436	error = cyttsp_set_sysinfo_mode(ts);
437	if (error)
438		return error;
439
440	error = cyttsp_set_sysinfo_regs(ts);
441	if (error)
442		return error;
443
444	error = cyttsp_set_operational_mode(ts);
445	if (error)
446		return error;
447
448	/* init active distance */
449	error = cyttsp_act_dist_setup(ts);
450	if (error)
451		return error;
452
453	ts->state = CY_ACTIVE_STATE;
454
455	return 0;
456}
457
458static int cyttsp_enable(struct cyttsp *ts)
459{
460	int error;
461
462	/*
463	 * The device firmware can wake on an I2C or SPI memory slave
464	 * address match. So just reading a register is sufficient to
465	 * wake up the device. The first read attempt will fail but it
466	 * will wake it up making the second read attempt successful.
467	 */
468	error = ttsp_read_block_data(ts, CY_REG_BASE,
469				     sizeof(ts->xy_data), &ts->xy_data);
470	if (error)
471		return error;
472
473	if (GET_HSTMODE(ts->xy_data.hst_mode))
474		return -EIO;
475
476	enable_irq(ts->irq);
477
478	return 0;
479}
480
481static int cyttsp_disable(struct cyttsp *ts)
482{
483	int error;
484
485	error = ttsp_send_command(ts, CY_LOW_POWER_MODE);
486	if (error)
487		return error;
488
489	disable_irq(ts->irq);
490
491	return 0;
492}
493
494static int cyttsp_suspend(struct device *dev)
495{
496	struct cyttsp *ts = dev_get_drvdata(dev);
497	int retval = 0;
498
499	mutex_lock(&ts->input->mutex);
500
501	if (input_device_enabled(ts->input)) {
502		retval = cyttsp_disable(ts);
503		if (retval == 0)
504			ts->suspended = true;
505	}
506
507	mutex_unlock(&ts->input->mutex);
508
509	return retval;
510}
511
512static int cyttsp_resume(struct device *dev)
513{
514	struct cyttsp *ts = dev_get_drvdata(dev);
515
516	mutex_lock(&ts->input->mutex);
517
518	if (input_device_enabled(ts->input))
519		cyttsp_enable(ts);
520
521	ts->suspended = false;
522
523	mutex_unlock(&ts->input->mutex);
524
525	return 0;
526}
527
528EXPORT_GPL_SIMPLE_DEV_PM_OPS(cyttsp_pm_ops, cyttsp_suspend, cyttsp_resume);
529
530static int cyttsp_open(struct input_dev *dev)
531{
532	struct cyttsp *ts = input_get_drvdata(dev);
533	int retval = 0;
534
535	if (!ts->suspended)
536		retval = cyttsp_enable(ts);
537
538	return retval;
539}
540
541static void cyttsp_close(struct input_dev *dev)
542{
543	struct cyttsp *ts = input_get_drvdata(dev);
544
545	if (!ts->suspended)
546		cyttsp_disable(ts);
547}
548
549static int cyttsp_parse_properties(struct cyttsp *ts)
550{
551	struct device *dev = ts->dev;
552	u32 dt_value;
553	int ret;
554
555	ts->bl_keys = devm_kzalloc(dev, CY_NUM_BL_KEYS, GFP_KERNEL);
556	if (!ts->bl_keys)
557		return -ENOMEM;
558
559	/* Set some default values */
560	ts->use_hndshk = false;
561	ts->act_dist = CY_ACT_DIST_DFLT;
562	ts->act_intrvl = CY_ACT_INTRVL_DFLT;
563	ts->tch_tmout = CY_TCH_TMOUT_DFLT;
564	ts->lp_intrvl = CY_LP_INTRVL_DFLT;
565
566	ret = device_property_read_u8_array(dev, "bootloader-key",
567					    ts->bl_keys, CY_NUM_BL_KEYS);
568	if (ret) {
569		dev_err(dev,
570			"bootloader-key property could not be retrieved\n");
571		return ret;
572	}
573
574	ts->use_hndshk = device_property_present(dev, "use-handshake");
575
576	if (!device_property_read_u32(dev, "active-distance", &dt_value)) {
577		if (dt_value > 15) {
578			dev_err(dev, "active-distance (%u) must be [0-15]\n",
579				dt_value);
580			return -EINVAL;
581		}
582		ts->act_dist &= ~CY_ACT_DIST_MASK;
583		ts->act_dist |= dt_value;
584	}
585
586	if (!device_property_read_u32(dev, "active-interval-ms", &dt_value)) {
587		if (dt_value > 255) {
588			dev_err(dev, "active-interval-ms (%u) must be [0-255]\n",
589				dt_value);
590			return -EINVAL;
591		}
592		ts->act_intrvl = dt_value;
593	}
594
595	if (!device_property_read_u32(dev, "lowpower-interval-ms", &dt_value)) {
596		if (dt_value > 2550) {
597			dev_err(dev, "lowpower-interval-ms (%u) must be [0-2550]\n",
598				dt_value);
599			return -EINVAL;
600		}
601		/* Register value is expressed in 0.01s / bit */
602		ts->lp_intrvl = dt_value / 10;
603	}
604
605	if (!device_property_read_u32(dev, "touch-timeout-ms", &dt_value)) {
606		if (dt_value > 2550) {
607			dev_err(dev, "touch-timeout-ms (%u) must be [0-2550]\n",
608				dt_value);
609			return -EINVAL;
610		}
611		/* Register value is expressed in 0.01s / bit */
612		ts->tch_tmout = dt_value / 10;
613	}
614
615	return 0;
616}
617
618static void cyttsp_disable_regulators(void *_ts)
619{
620	struct cyttsp *ts = _ts;
621
622	regulator_bulk_disable(ARRAY_SIZE(ts->regulators),
623			       ts->regulators);
624}
625
626struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
627			    struct device *dev, int irq, size_t xfer_buf_size)
628{
629	struct cyttsp *ts;
630	struct input_dev *input_dev;
631	int error;
632
633	ts = devm_kzalloc(dev, sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
634	if (!ts)
635		return ERR_PTR(-ENOMEM);
636
637	input_dev = devm_input_allocate_device(dev);
638	if (!input_dev)
639		return ERR_PTR(-ENOMEM);
640
641	ts->dev = dev;
642	ts->input = input_dev;
643	ts->bus_ops = bus_ops;
644	ts->irq = irq;
645
646	/*
647	 * VCPIN is the analog voltage supply
648	 * VDD is the digital voltage supply
649	 */
650	ts->regulators[0].supply = "vcpin";
651	ts->regulators[1].supply = "vdd";
652	error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->regulators),
653					ts->regulators);
654	if (error) {
655		dev_err(dev, "Failed to get regulators: %d\n", error);
656		return ERR_PTR(error);
657	}
658
659	error = regulator_bulk_enable(ARRAY_SIZE(ts->regulators),
660				      ts->regulators);
661	if (error) {
662		dev_err(dev, "Cannot enable regulators: %d\n", error);
663		return ERR_PTR(error);
664	}
665
666	error = devm_add_action_or_reset(dev, cyttsp_disable_regulators, ts);
667	if (error) {
668		dev_err(dev, "failed to install chip disable handler\n");
669		return ERR_PTR(error);
670	}
671
672	ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
673	if (IS_ERR(ts->reset_gpio)) {
674		error = PTR_ERR(ts->reset_gpio);
675		dev_err(dev, "Failed to request reset gpio, error %d\n", error);
676		return ERR_PTR(error);
677	}
678
679	error = cyttsp_parse_properties(ts);
680	if (error)
681		return ERR_PTR(error);
682
683	init_completion(&ts->bl_ready);
684
685	input_dev->name = "Cypress TTSP TouchScreen";
686	input_dev->id.bustype = bus_ops->bustype;
687	input_dev->dev.parent = ts->dev;
688
689	input_dev->open = cyttsp_open;
690	input_dev->close = cyttsp_close;
691
692	input_set_drvdata(input_dev, ts);
693
694	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
695	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
696	/* One byte for width 0..255 so this is the limit */
697	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
698
699	touchscreen_parse_properties(input_dev, true, NULL);
700
701	error = input_mt_init_slots(input_dev, CY_MAX_ID, INPUT_MT_DIRECT);
702	if (error) {
703		dev_err(dev, "Unable to init MT slots.\n");
704		return ERR_PTR(error);
705	}
706
707	error = devm_request_threaded_irq(dev, ts->irq, NULL, cyttsp_irq,
708					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
709					  "cyttsp", ts);
710	if (error) {
711		dev_err(ts->dev, "failed to request IRQ %d, err: %d\n",
712			ts->irq, error);
713		return ERR_PTR(error);
714	}
715
716	cyttsp_hard_reset(ts);
717
718	error = cyttsp_power_on(ts);
719	if (error)
720		return ERR_PTR(error);
721
722	error = input_register_device(input_dev);
723	if (error) {
724		dev_err(ts->dev, "failed to register input device: %d\n",
725			error);
726		return ERR_PTR(error);
727	}
728
729	return ts;
730}
731EXPORT_SYMBOL_GPL(cyttsp_probe);
732
733MODULE_LICENSE("GPL");
734MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
735MODULE_AUTHOR("Cypress");
736