1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * twl4030-vibra.c - TWL4030 Vibrator driver
  4 *
  5 * Copyright (C) 2008-2010 Nokia Corporation
  6 *
  7 * Written by Henrik Saari <henrik.saari@nokia.com>
  8 * Updates by Felipe Balbi <felipe.balbi@nokia.com>
  9 * Input by Jari Vanhala <ext-jari.vanhala@nokia.com>
 10 */
 11
 12#include <linux/module.h>
 13#include <linux/jiffies.h>
 14#include <linux/platform_device.h>
 15#include <linux/of.h>
 16#include <linux/workqueue.h>
 17#include <linux/mfd/twl.h>
 18#include <linux/mfd/twl4030-audio.h>
 19#include <linux/input.h>
 20#include <linux/slab.h>
 21
 22/* MODULE ID2 */
 23#define LEDEN		0x00
 24
 25/* ForceFeedback */
 26#define EFFECT_DIR_180_DEG	0x8000 /* range is 0 - 0xFFFF */
 27
 28struct vibra_info {
 29	struct device		*dev;
 30	struct input_dev	*input_dev;
 31
 32	struct work_struct	play_work;
 33
 34	bool			enabled;
 35	int			speed;
 36	int			direction;
 37
 38	bool			coexist;
 39};
 40
 41static void vibra_disable_leds(void)
 42{
 43	u8 reg;
 44
 45	/* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
 46	twl_i2c_read_u8(TWL4030_MODULE_LED, &reg, LEDEN);
 47	reg &= ~0x03;
 48	twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
 49}
 50
 51/* Powers H-Bridge and enables audio clk */
 52static void vibra_enable(struct vibra_info *info)
 53{
 54	u8 reg;
 55
 56	twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
 57
 58	/* turn H-Bridge on */
 59	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 60			&reg, TWL4030_REG_VIBRA_CTL);
 61	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
 62			 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
 63
 64	twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
 65
 66	info->enabled = true;
 67}
 68
 69static void vibra_disable(struct vibra_info *info)
 70{
 71	u8 reg;
 72
 73	/* Power down H-Bridge */
 74	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 75			&reg, TWL4030_REG_VIBRA_CTL);
 76	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
 77			 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
 78
 79	twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
 80	twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
 81
 82	info->enabled = false;
 83}
 84
 85static void vibra_play_work(struct work_struct *work)
 86{
 87	struct vibra_info *info = container_of(work,
 88			struct vibra_info, play_work);
 89	int dir;
 90	int pwm;
 91	u8 reg;
 92
 93	dir = info->direction;
 94	pwm = info->speed;
 95
 96	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 97			&reg, TWL4030_REG_VIBRA_CTL);
 98	if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
 99
100		if (!info->enabled)
101			vibra_enable(info);
102
103		/* set vibra rotation direction */
104		twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
105				&reg, TWL4030_REG_VIBRA_CTL);
106		reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
107			(reg & ~TWL4030_VIBRA_DIR);
108		twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
109				 reg, TWL4030_REG_VIBRA_CTL);
110
111		/* set PWM, 1 = max, 255 = min */
112		twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
113				 256 - pwm, TWL4030_REG_VIBRA_SET);
114	} else {
115		if (info->enabled)
116			vibra_disable(info);
117	}
118}
119
120/*** Input/ForceFeedback ***/
121
122static int vibra_play(struct input_dev *input, void *data,
123		      struct ff_effect *effect)
124{
125	struct vibra_info *info = input_get_drvdata(input);
126
127	info->speed = effect->u.rumble.strong_magnitude >> 8;
128	if (!info->speed)
129		info->speed = effect->u.rumble.weak_magnitude >> 9;
130	info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
131	schedule_work(&info->play_work);
132	return 0;
133}
134
135static void twl4030_vibra_close(struct input_dev *input)
136{
137	struct vibra_info *info = input_get_drvdata(input);
138
139	cancel_work_sync(&info->play_work);
140
141	if (info->enabled)
142		vibra_disable(info);
143}
144
145/*** Module ***/
146static int twl4030_vibra_suspend(struct device *dev)
147{
148	struct platform_device *pdev = to_platform_device(dev);
149	struct vibra_info *info = platform_get_drvdata(pdev);
150
151	if (info->enabled)
152		vibra_disable(info);
153
154	return 0;
155}
156
157static int twl4030_vibra_resume(struct device *dev)
158{
159	vibra_disable_leds();
160	return 0;
161}
162
163static DEFINE_SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
164				twl4030_vibra_suspend, twl4030_vibra_resume);
165
166static bool twl4030_vibra_check_coexist(struct device_node *parent)
167{
168	struct device_node *node __free(device_node) =
169		of_get_child_by_name(parent, "codec");
170
171	return node != NULL;
 
 
 
 
 
 
172}
173
174static int twl4030_vibra_probe(struct platform_device *pdev)
175{
176	struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
177	struct vibra_info *info;
178	int ret;
179
180	if (!twl4030_core_node) {
181		dev_dbg(&pdev->dev, "twl4030 OF node is missing\n");
182		return -EINVAL;
183	}
184
185	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
186	if (!info)
187		return -ENOMEM;
188
189	info->dev = &pdev->dev;
190	info->coexist = twl4030_vibra_check_coexist(twl4030_core_node);
191	INIT_WORK(&info->play_work, vibra_play_work);
192
193	info->input_dev = devm_input_allocate_device(&pdev->dev);
194	if (info->input_dev == NULL) {
195		dev_err(&pdev->dev, "couldn't allocate input device\n");
196		return -ENOMEM;
197	}
198
199	input_set_drvdata(info->input_dev, info);
200
201	info->input_dev->name = "twl4030:vibrator";
202	info->input_dev->id.version = 1;
203	info->input_dev->close = twl4030_vibra_close;
204	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
205
206	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
207	if (ret < 0) {
208		dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
209		return ret;
210	}
211
212	ret = input_register_device(info->input_dev);
213	if (ret < 0) {
214		dev_dbg(&pdev->dev, "couldn't register input device\n");
215		goto err_iff;
216	}
217
218	vibra_disable_leds();
219
220	platform_set_drvdata(pdev, info);
221	return 0;
222
223err_iff:
224	input_ff_destroy(info->input_dev);
225	return ret;
226}
227
228static struct platform_driver twl4030_vibra_driver = {
229	.probe		= twl4030_vibra_probe,
230	.driver		= {
231		.name	= "twl4030-vibra",
232		.pm	= pm_sleep_ptr(&twl4030_vibra_pm_ops),
233	},
234};
235module_platform_driver(twl4030_vibra_driver);
236
237MODULE_ALIAS("platform:twl4030-vibra");
238MODULE_DESCRIPTION("TWL4030 Vibra driver");
239MODULE_LICENSE("GPL");
240MODULE_AUTHOR("Nokia Corporation");

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * twl4030-vibra.c - TWL4030 Vibrator driver
  4 *
  5 * Copyright (C) 2008-2010 Nokia Corporation
  6 *
  7 * Written by Henrik Saari <henrik.saari@nokia.com>
  8 * Updates by Felipe Balbi <felipe.balbi@nokia.com>
  9 * Input by Jari Vanhala <ext-jari.vanhala@nokia.com>
 10 */
 11
 12#include <linux/module.h>
 13#include <linux/jiffies.h>
 14#include <linux/platform_device.h>
 15#include <linux/of.h>
 16#include <linux/workqueue.h>
 17#include <linux/mfd/twl.h>
 18#include <linux/mfd/twl4030-audio.h>
 19#include <linux/input.h>
 20#include <linux/slab.h>
 21
 22/* MODULE ID2 */
 23#define LEDEN		0x00
 24
 25/* ForceFeedback */
 26#define EFFECT_DIR_180_DEG	0x8000 /* range is 0 - 0xFFFF */
 27
 28struct vibra_info {
 29	struct device		*dev;
 30	struct input_dev	*input_dev;
 31
 32	struct work_struct	play_work;
 33
 34	bool			enabled;
 35	int			speed;
 36	int			direction;
 37
 38	bool			coexist;
 39};
 40
 41static void vibra_disable_leds(void)
 42{
 43	u8 reg;
 44
 45	/* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
 46	twl_i2c_read_u8(TWL4030_MODULE_LED, &reg, LEDEN);
 47	reg &= ~0x03;
 48	twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
 49}
 50
 51/* Powers H-Bridge and enables audio clk */
 52static void vibra_enable(struct vibra_info *info)
 53{
 54	u8 reg;
 55
 56	twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
 57
 58	/* turn H-Bridge on */
 59	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 60			&reg, TWL4030_REG_VIBRA_CTL);
 61	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
 62			 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
 63
 64	twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
 65
 66	info->enabled = true;
 67}
 68
 69static void vibra_disable(struct vibra_info *info)
 70{
 71	u8 reg;
 72
 73	/* Power down H-Bridge */
 74	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 75			&reg, TWL4030_REG_VIBRA_CTL);
 76	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
 77			 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
 78
 79	twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
 80	twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
 81
 82	info->enabled = false;
 83}
 84
 85static void vibra_play_work(struct work_struct *work)
 86{
 87	struct vibra_info *info = container_of(work,
 88			struct vibra_info, play_work);
 89	int dir;
 90	int pwm;
 91	u8 reg;
 92
 93	dir = info->direction;
 94	pwm = info->speed;
 95
 96	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
 97			&reg, TWL4030_REG_VIBRA_CTL);
 98	if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
 99
100		if (!info->enabled)
101			vibra_enable(info);
102
103		/* set vibra rotation direction */
104		twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
105				&reg, TWL4030_REG_VIBRA_CTL);
106		reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
107			(reg & ~TWL4030_VIBRA_DIR);
108		twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
109				 reg, TWL4030_REG_VIBRA_CTL);
110
111		/* set PWM, 1 = max, 255 = min */
112		twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
113				 256 - pwm, TWL4030_REG_VIBRA_SET);
114	} else {
115		if (info->enabled)
116			vibra_disable(info);
117	}
118}
119
120/*** Input/ForceFeedback ***/
121
122static int vibra_play(struct input_dev *input, void *data,
123		      struct ff_effect *effect)
124{
125	struct vibra_info *info = input_get_drvdata(input);
126
127	info->speed = effect->u.rumble.strong_magnitude >> 8;
128	if (!info->speed)
129		info->speed = effect->u.rumble.weak_magnitude >> 9;
130	info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
131	schedule_work(&info->play_work);
132	return 0;
133}
134
135static void twl4030_vibra_close(struct input_dev *input)
136{
137	struct vibra_info *info = input_get_drvdata(input);
138
139	cancel_work_sync(&info->play_work);
140
141	if (info->enabled)
142		vibra_disable(info);
143}
144
145/*** Module ***/
146static int twl4030_vibra_suspend(struct device *dev)
147{
148	struct platform_device *pdev = to_platform_device(dev);
149	struct vibra_info *info = platform_get_drvdata(pdev);
150
151	if (info->enabled)
152		vibra_disable(info);
153
154	return 0;
155}
156
157static int twl4030_vibra_resume(struct device *dev)
158{
159	vibra_disable_leds();
160	return 0;
161}
162
163static DEFINE_SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
164				twl4030_vibra_suspend, twl4030_vibra_resume);
165
166static bool twl4030_vibra_check_coexist(struct device_node *parent)
167{
168	struct device_node *node;
 
169
170	node = of_get_child_by_name(parent, "codec");
171	if (node) {
172		of_node_put(node);
173		return true;
174	}
175
176	return false;
177}
178
179static int twl4030_vibra_probe(struct platform_device *pdev)
180{
181	struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
182	struct vibra_info *info;
183	int ret;
184
185	if (!twl4030_core_node) {
186		dev_dbg(&pdev->dev, "twl4030 OF node is missing\n");
187		return -EINVAL;
188	}
189
190	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
191	if (!info)
192		return -ENOMEM;
193
194	info->dev = &pdev->dev;
195	info->coexist = twl4030_vibra_check_coexist(twl4030_core_node);
196	INIT_WORK(&info->play_work, vibra_play_work);
197
198	info->input_dev = devm_input_allocate_device(&pdev->dev);
199	if (info->input_dev == NULL) {
200		dev_err(&pdev->dev, "couldn't allocate input device\n");
201		return -ENOMEM;
202	}
203
204	input_set_drvdata(info->input_dev, info);
205
206	info->input_dev->name = "twl4030:vibrator";
207	info->input_dev->id.version = 1;
208	info->input_dev->close = twl4030_vibra_close;
209	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
210
211	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
212	if (ret < 0) {
213		dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
214		return ret;
215	}
216
217	ret = input_register_device(info->input_dev);
218	if (ret < 0) {
219		dev_dbg(&pdev->dev, "couldn't register input device\n");
220		goto err_iff;
221	}
222
223	vibra_disable_leds();
224
225	platform_set_drvdata(pdev, info);
226	return 0;
227
228err_iff:
229	input_ff_destroy(info->input_dev);
230	return ret;
231}
232
233static struct platform_driver twl4030_vibra_driver = {
234	.probe		= twl4030_vibra_probe,
235	.driver		= {
236		.name	= "twl4030-vibra",
237		.pm	= pm_sleep_ptr(&twl4030_vibra_pm_ops),
238	},
239};
240module_platform_driver(twl4030_vibra_driver);
241
242MODULE_ALIAS("platform:twl4030-vibra");
243MODULE_DESCRIPTION("TWL4030 Vibra driver");
244MODULE_LICENSE("GPL");
245MODULE_AUTHOR("Nokia Corporation");