1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
5 #include <linux/errno.h>
6 #include <linux/input.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/regmap.h>
12 #include <linux/slab.h>
14 #define VIB_MAX_LEVEL_mV (3100)
15 #define VIB_MIN_LEVEL_mV (1200)
16 #define VIB_MAX_LEVELS (VIB_MAX_LEVEL_mV - VIB_MIN_LEVEL_mV)
18 #define MAX_FF_SPEED 0xff
21 unsigned int enable_addr;
22 unsigned int enable_mask;
24 unsigned int drv_addr;
25 unsigned int drv_mask;
26 unsigned int drv_shift;
27 unsigned int drv_en_manual_mask;
30 static const struct pm8xxx_regs pm8058_regs = {
34 .drv_en_manual_mask = 0xfc,
37 static struct pm8xxx_regs pm8916_regs = {
38 .enable_addr = 0xc046,
39 .enable_mask = BIT(7),
43 .drv_en_manual_mask = 0,
47 * struct pm8xxx_vib - structure to hold vibrator data
48 * @vib_input_dev: input device supporting force feedback
49 * @work: work structure to set the vibration parameters
50 * @regmap: regmap for register read/write
51 * @regs: registers' info
52 * @speed: speed of vibration set from userland
53 * @active: state of vibrator
54 * @level: level of vibration to set in the chip
55 * @reg_vib_drv: regs->drv_addr register value
58 struct input_dev *vib_input_dev;
59 struct work_struct work;
60 struct regmap *regmap;
61 const struct pm8xxx_regs *regs;
69 * pm8xxx_vib_set - handler to start/stop vibration
70 * @vib: pointer to vibrator structure
73 static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
76 unsigned int val = vib->reg_vib_drv;
77 const struct pm8xxx_regs *regs = vib->regs;
80 val |= (vib->level << regs->drv_shift) & regs->drv_mask;
82 val &= ~regs->drv_mask;
84 rc = regmap_write(vib->regmap, regs->drv_addr, val);
88 vib->reg_vib_drv = val;
90 if (regs->enable_mask)
91 rc = regmap_update_bits(vib->regmap, regs->enable_addr,
92 regs->enable_mask, on ? ~0 : 0);
98 * pm8xxx_work_handler - worker to set vibration level
99 * @work: pointer to work_struct
101 static void pm8xxx_work_handler(struct work_struct *work)
103 struct pm8xxx_vib *vib = container_of(work, struct pm8xxx_vib, work);
104 const struct pm8xxx_regs *regs = vib->regs;
108 rc = regmap_read(vib->regmap, regs->drv_addr, &val);
113 * pmic vibrator supports voltage ranges from 1.2 to 3.1V, so
114 * scale the level to fit into these ranges.
118 vib->level = ((VIB_MAX_LEVELS * vib->speed) / MAX_FF_SPEED) +
123 vib->level = VIB_MIN_LEVEL_mV / 100;
126 pm8xxx_vib_set(vib, vib->active);
130 * pm8xxx_vib_close - callback of input close callback
131 * @dev: input device pointer
133 * Turns off the vibrator.
135 static void pm8xxx_vib_close(struct input_dev *dev)
137 struct pm8xxx_vib *vib = input_get_drvdata(dev);
139 cancel_work_sync(&vib->work);
141 pm8xxx_vib_set(vib, false);
145 * pm8xxx_vib_play_effect - function to handle vib effects.
146 * @dev: input device pointer
147 * @data: data of effect
148 * @effect: effect to play
150 * Currently this driver supports only rumble effects.
152 static int pm8xxx_vib_play_effect(struct input_dev *dev, void *data,
153 struct ff_effect *effect)
155 struct pm8xxx_vib *vib = input_get_drvdata(dev);
157 vib->speed = effect->u.rumble.strong_magnitude >> 8;
159 vib->speed = effect->u.rumble.weak_magnitude >> 9;
161 schedule_work(&vib->work);
166 static int pm8xxx_vib_probe(struct platform_device *pdev)
168 struct pm8xxx_vib *vib;
169 struct input_dev *input_dev;
172 const struct pm8xxx_regs *regs;
174 vib = devm_kzalloc(&pdev->dev, sizeof(*vib), GFP_KERNEL);
178 vib->regmap = dev_get_regmap(pdev->dev.parent, NULL);
182 input_dev = devm_input_allocate_device(&pdev->dev);
186 INIT_WORK(&vib->work, pm8xxx_work_handler);
187 vib->vib_input_dev = input_dev;
189 regs = of_device_get_match_data(&pdev->dev);
191 /* operate in manual mode */
192 error = regmap_read(vib->regmap, regs->drv_addr, &val);
196 val &= regs->drv_en_manual_mask;
197 error = regmap_write(vib->regmap, regs->drv_addr, val);
202 vib->reg_vib_drv = val;
204 input_dev->name = "pm8xxx_vib_ffmemless";
205 input_dev->id.version = 1;
206 input_dev->close = pm8xxx_vib_close;
207 input_set_drvdata(input_dev, vib);
208 input_set_capability(vib->vib_input_dev, EV_FF, FF_RUMBLE);
210 error = input_ff_create_memless(input_dev, NULL,
211 pm8xxx_vib_play_effect);
214 "couldn't register vibrator as FF device\n");
218 error = input_register_device(input_dev);
220 dev_err(&pdev->dev, "couldn't register input device\n");
224 platform_set_drvdata(pdev, vib);
228 static int pm8xxx_vib_suspend(struct device *dev)
230 struct pm8xxx_vib *vib = dev_get_drvdata(dev);
232 /* Turn off the vibrator */
233 pm8xxx_vib_set(vib, false);
238 static DEFINE_SIMPLE_DEV_PM_OPS(pm8xxx_vib_pm_ops, pm8xxx_vib_suspend, NULL);
240 static const struct of_device_id pm8xxx_vib_id_table[] = {
241 { .compatible = "qcom,pm8058-vib", .data = &pm8058_regs },
242 { .compatible = "qcom,pm8921-vib", .data = &pm8058_regs },
243 { .compatible = "qcom,pm8916-vib", .data = &pm8916_regs },
246 MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);
248 static struct platform_driver pm8xxx_vib_driver = {
249 .probe = pm8xxx_vib_probe,
251 .name = "pm8xxx-vib",
252 .pm = pm_sleep_ptr(&pm8xxx_vib_pm_ops),
253 .of_match_table = pm8xxx_vib_id_table,
256 module_platform_driver(pm8xxx_vib_driver);
258 MODULE_ALIAS("platform:pm8xxx_vib");
259 MODULE_DESCRIPTION("PMIC8xxx vibrator driver based on ff-memless framework");
260 MODULE_LICENSE("GPL v2");
261 MODULE_AUTHOR("Amy Maloche <amaloche@codeaurora.org>");