1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * MAXIM MAX77693/MAX77843 Haptic device driver
24 #include <linux/mfd/max77693-common.h>
25 #include <linux/mfd/max77693-private.h>
26 #include <linux/mfd/max77843-private.h>
67 static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic)  in max77693_haptic_set_duty_cycle()  argument
73 	pwm_get_args(haptic->pwm_dev, &pargs);  in max77693_haptic_set_duty_cycle()
74 	delta = (pargs.period + haptic->pwm_duty) / 2;  in max77693_haptic_set_duty_cycle()
75 	error = pwm_config(haptic->pwm_dev, delta, pargs.period);  in max77693_haptic_set_duty_cycle()
77 		dev_err(haptic->dev, "failed to configure pwm: %d\n", error);  in max77693_haptic_set_duty_cycle()
84 static int max77843_haptic_bias(struct max77693_haptic *haptic, bool on)  in max77843_haptic_bias()  argument
88 	if (haptic->dev_type != TYPE_MAX77843)  in max77843_haptic_bias()
91 	error = regmap_update_bits(haptic->regmap_haptic,  in max77843_haptic_bias()
96 		dev_err(haptic->dev, "failed to %s bias: %d\n",  in max77843_haptic_bias()
104 static int max77693_haptic_configure(struct max77693_haptic *haptic,  in max77693_haptic_configure()  argument
110 	switch (haptic->dev_type) {  in max77693_haptic_configure()
112 		value = ((haptic->type << MAX77693_CONFIG2_MODE) |  in max77693_haptic_configure()
114 			(haptic->mode << MAX77693_CONFIG2_HTYP) |  in max77693_haptic_configure()
119 		value = (haptic->type << MCONFIG_MODE_SHIFT) |  in max77693_haptic_configure()
125 		return -EINVAL;  in max77693_haptic_configure()
128 	error = regmap_write(haptic->regmap_haptic,  in max77693_haptic_configure()
131 		dev_err(haptic->dev,  in max77693_haptic_configure()
132 			"failed to update haptic config: %d\n", error);  in max77693_haptic_configure()
139 static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable)  in max77693_haptic_lowsys()  argument
143 	if (haptic->dev_type != TYPE_MAX77693)  in max77693_haptic_lowsys()
146 	error = regmap_update_bits(haptic->regmap_pmic,  in max77693_haptic_lowsys()
151 		dev_err(haptic->dev, "cannot update pmic regmap: %d\n", error);  in max77693_haptic_lowsys()
158 static void max77693_haptic_enable(struct max77693_haptic *haptic)  in max77693_haptic_enable()  argument
162 	if (haptic->enabled)  in max77693_haptic_enable()
165 	error = pwm_enable(haptic->pwm_dev);  in max77693_haptic_enable()
167 		dev_err(haptic->dev,  in max77693_haptic_enable()
168 			"failed to enable haptic pwm device: %d\n", error);  in max77693_haptic_enable()
172 	error = max77693_haptic_lowsys(haptic, true);  in max77693_haptic_enable()
176 	error = max77693_haptic_configure(haptic, true);  in max77693_haptic_enable()
180 	haptic->enabled = true;  in max77693_haptic_enable()
185 	max77693_haptic_lowsys(haptic, false);  in max77693_haptic_enable()
187 	pwm_disable(haptic->pwm_dev);  in max77693_haptic_enable()
190 static void max77693_haptic_disable(struct max77693_haptic *haptic)  in max77693_haptic_disable()  argument
194 	if (!haptic->enabled)  in max77693_haptic_disable()
197 	error = max77693_haptic_configure(haptic, false);  in max77693_haptic_disable()
201 	error = max77693_haptic_lowsys(haptic, false);  in max77693_haptic_disable()
205 	pwm_disable(haptic->pwm_dev);  in max77693_haptic_disable()
206 	haptic->enabled = false;  in max77693_haptic_disable()
211 	max77693_haptic_configure(haptic, true);  in max77693_haptic_disable()
216 	struct max77693_haptic *haptic =  in max77693_haptic_play_work()  local
220 	error = max77693_haptic_set_duty_cycle(haptic);  in max77693_haptic_play_work()
222 		dev_err(haptic->dev, "failed to set duty cycle: %d\n", error);  in max77693_haptic_play_work()
226 	if (haptic->magnitude)  in max77693_haptic_play_work()
227 		max77693_haptic_enable(haptic);  in max77693_haptic_play_work()
229 		max77693_haptic_disable(haptic);  in max77693_haptic_play_work()
235 	struct max77693_haptic *haptic = input_get_drvdata(dev);  in max77693_haptic_play_effect()  local
239 	haptic->magnitude = effect->u.rumble.strong_magnitude;  in max77693_haptic_play_effect()
240 	if (!haptic->magnitude)  in max77693_haptic_play_effect()
241 		haptic->magnitude = effect->u.rumble.weak_magnitude;  in max77693_haptic_play_effect()
244 	 * The magnitude comes from force-feedback interface.  in max77693_haptic_play_effect()
246 	 * - pwm_duty = (magnitude * pwm_period) / MAX_MAGNITUDE(0xFFFF)  in max77693_haptic_play_effect()
248 	pwm_get_args(haptic->pwm_dev, &pargs);  in max77693_haptic_play_effect()
249 	period_mag_multi = (u64)pargs.period * haptic->magnitude;  in max77693_haptic_play_effect()
250 	haptic->pwm_duty = (unsigned int)(period_mag_multi >>  in max77693_haptic_play_effect()
253 	schedule_work(&haptic->work);  in max77693_haptic_play_effect()
260 	struct max77693_haptic *haptic = input_get_drvdata(dev);  in max77693_haptic_open()  local
263 	error = max77843_haptic_bias(haptic, true);  in max77693_haptic_open()
267 	error = regulator_enable(haptic->motor_reg);  in max77693_haptic_open()
269 		dev_err(haptic->dev,  in max77693_haptic_open()
279 	struct max77693_haptic *haptic = input_get_drvdata(dev);  in max77693_haptic_close()  local
282 	cancel_work_sync(&haptic->work);  in max77693_haptic_close()
283 	max77693_haptic_disable(haptic);  in max77693_haptic_close()
285 	error = regulator_disable(haptic->motor_reg);  in max77693_haptic_close()
287 		dev_err(haptic->dev,  in max77693_haptic_close()
290 	max77843_haptic_bias(haptic, false);  in max77693_haptic_close()
295 	struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);  in max77693_haptic_probe()
296 	struct max77693_haptic *haptic;  in max77693_haptic_probe()  local
299 	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);  in max77693_haptic_probe()
300 	if (!haptic)  in max77693_haptic_probe()
301 		return -ENOMEM;  in max77693_haptic_probe()
303 	haptic->regmap_pmic = max77693->regmap;  in max77693_haptic_probe()
304 	haptic->dev = &pdev->dev;  in max77693_haptic_probe()
305 	haptic->type = MAX77693_HAPTIC_LRA;  in max77693_haptic_probe()
306 	haptic->mode = MAX77693_HAPTIC_EXTERNAL_MODE;  in max77693_haptic_probe()
307 	haptic->suspend_state = false;  in max77693_haptic_probe()
309 	/* Variant-specific init */  in max77693_haptic_probe()
310 	haptic->dev_type = max77693->type;  in max77693_haptic_probe()
311 	switch (haptic->dev_type) {  in max77693_haptic_probe()
313 		haptic->regmap_haptic = max77693->regmap_haptic;  in max77693_haptic_probe()
316 		haptic->regmap_haptic = max77693->regmap;  in max77693_haptic_probe()
319 		dev_err(&pdev->dev, "unsupported device type: %u\n",  in max77693_haptic_probe()
320 			haptic->dev_type);  in max77693_haptic_probe()
321 		return -EINVAL;  in max77693_haptic_probe()
324 	INIT_WORK(&haptic->work, max77693_haptic_play_work);  in max77693_haptic_probe()
326 	/* Get pwm and regulatot for haptic device */  in max77693_haptic_probe()
327 	haptic->pwm_dev = devm_pwm_get(&pdev->dev, NULL);  in max77693_haptic_probe()
328 	if (IS_ERR(haptic->pwm_dev)) {  in max77693_haptic_probe()
329 		dev_err(&pdev->dev, "failed to get pwm device\n");  in max77693_haptic_probe()
330 		return PTR_ERR(haptic->pwm_dev);  in max77693_haptic_probe()
337 	pwm_apply_args(haptic->pwm_dev);  in max77693_haptic_probe()
339 	haptic->motor_reg = devm_regulator_get(&pdev->dev, "haptic");  in max77693_haptic_probe()
340 	if (IS_ERR(haptic->motor_reg)) {  in max77693_haptic_probe()
341 		dev_err(&pdev->dev, "failed to get regulator\n");  in max77693_haptic_probe()
342 		return PTR_ERR(haptic->motor_reg);  in max77693_haptic_probe()
345 	/* Initialize input device for haptic device */  in max77693_haptic_probe()
346 	haptic->input_dev = devm_input_allocate_device(&pdev->dev);  in max77693_haptic_probe()
347 	if (!haptic->input_dev) {  in max77693_haptic_probe()
348 		dev_err(&pdev->dev, "failed to allocate input device\n");  in max77693_haptic_probe()
349 		return -ENOMEM;  in max77693_haptic_probe()
352 	haptic->input_dev->name = "max77693-haptic";  in max77693_haptic_probe()
353 	haptic->input_dev->id.version = 1;  in max77693_haptic_probe()
354 	haptic->input_dev->dev.parent = &pdev->dev;  in max77693_haptic_probe()
355 	haptic->input_dev->open = max77693_haptic_open;  in max77693_haptic_probe()
356 	haptic->input_dev->close = max77693_haptic_close;  in max77693_haptic_probe()
357 	input_set_drvdata(haptic->input_dev, haptic);  in max77693_haptic_probe()
358 	input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE);  in max77693_haptic_probe()
360 	error = input_ff_create_memless(haptic->input_dev, NULL,  in max77693_haptic_probe()
363 		dev_err(&pdev->dev, "failed to create force-feedback\n");  in max77693_haptic_probe()
367 	error = input_register_device(haptic->input_dev);  in max77693_haptic_probe()
369 		dev_err(&pdev->dev, "failed to register input device\n");  in max77693_haptic_probe()
373 	platform_set_drvdata(pdev, haptic);  in max77693_haptic_probe()
381 	struct max77693_haptic *haptic = platform_get_drvdata(pdev);  in max77693_haptic_suspend()  local
383 	if (haptic->enabled) {  in max77693_haptic_suspend()
384 		max77693_haptic_disable(haptic);  in max77693_haptic_suspend()
385 		haptic->suspend_state = true;  in max77693_haptic_suspend()
394 	struct max77693_haptic *haptic = platform_get_drvdata(pdev);  in max77693_haptic_resume()  local
396 	if (haptic->suspend_state) {  in max77693_haptic_resume()
397 		max77693_haptic_enable(haptic);  in max77693_haptic_resume()
398 		haptic->suspend_state = false;  in max77693_haptic_resume()
409 	{ "max77693-haptic", },
410 	{ "max77843-haptic", },
416 	{ .compatible = "maxim,max77693-haptic", },
417 	{ .compatible = "maxim,max77843-haptic", },
423 	.driver		= {
424 		.name	= "max77693-haptic",
435 MODULE_DESCRIPTION("MAXIM 77693/77843 Haptic driver");