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10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/input.h>
13#include <linux/slab.h>
14
15#include <sound/soc.h>
16#include <sound/soc-dapm.h>
17
18#include <linux/mfd/arizona/core.h>
19#include <linux/mfd/arizona/pdata.h>
20#include <linux/mfd/arizona/registers.h>
21
22struct arizona_haptics {
23 struct arizona *arizona;
24 struct input_dev *input_dev;
25 struct work_struct work;
26
27 struct mutex mutex;
28 u8 intensity;
29};
30
31static void arizona_haptics_work(struct work_struct *work)
32{
33 struct arizona_haptics *haptics = container_of(work,
34 struct arizona_haptics,
35 work);
36 struct arizona *arizona = haptics->arizona;
37 struct snd_soc_component *component =
38 snd_soc_dapm_to_component(arizona->dapm);
39 int ret;
40
41 if (!haptics->arizona->dapm) {
42 dev_err(arizona->dev, "No DAPM context\n");
43 return;
44 }
45
46 if (haptics->intensity) {
47 ret = regmap_update_bits(arizona->regmap,
48 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
49 ARIZONA_PHASE2_INTENSITY_MASK,
50 haptics->intensity);
51 if (ret != 0) {
52 dev_err(arizona->dev, "Failed to set intensity: %d\n",
53 ret);
54 return;
55 }
56
57
58 ret = regmap_update_bits(arizona->regmap,
59 ARIZONA_HAPTICS_CONTROL_1,
60 ARIZONA_HAP_CTRL_MASK,
61 1 << ARIZONA_HAP_CTRL_SHIFT);
62 if (ret != 0) {
63 dev_err(arizona->dev, "Failed to start haptics: %d\n",
64 ret);
65 return;
66 }
67
68 ret = snd_soc_component_enable_pin(component, "HAPTICS");
69 if (ret != 0) {
70 dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
71 ret);
72 return;
73 }
74
75 ret = snd_soc_dapm_sync(arizona->dapm);
76 if (ret != 0) {
77 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
78 ret);
79 return;
80 }
81 } else {
82
83 ret = snd_soc_component_disable_pin(component, "HAPTICS");
84 if (ret != 0) {
85 dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
86 ret);
87 return;
88 }
89
90 ret = snd_soc_dapm_sync(arizona->dapm);
91 if (ret != 0) {
92 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
93 ret);
94 return;
95 }
96
97 ret = regmap_update_bits(arizona->regmap,
98 ARIZONA_HAPTICS_CONTROL_1,
99 ARIZONA_HAP_CTRL_MASK, 0);
100 if (ret != 0) {
101 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
102 ret);
103 return;
104 }
105 }
106}
107
108static int arizona_haptics_play(struct input_dev *input, void *data,
109 struct ff_effect *effect)
110{
111 struct arizona_haptics *haptics = input_get_drvdata(input);
112 struct arizona *arizona = haptics->arizona;
113
114 if (!arizona->dapm) {
115 dev_err(arizona->dev, "No DAPM context\n");
116 return -EBUSY;
117 }
118
119 if (effect->u.rumble.strong_magnitude) {
120
121 if (arizona->pdata.hap_act) {
122 haptics->intensity =
123 effect->u.rumble.strong_magnitude >> 9;
124 if (effect->direction < 0x8000)
125 haptics->intensity += 0x7f;
126 } else {
127 haptics->intensity =
128 effect->u.rumble.strong_magnitude >> 8;
129 }
130 } else {
131 haptics->intensity = 0;
132 }
133
134 schedule_work(&haptics->work);
135
136 return 0;
137}
138
139static void arizona_haptics_close(struct input_dev *input)
140{
141 struct arizona_haptics *haptics = input_get_drvdata(input);
142 struct snd_soc_component *component;
143
144 cancel_work_sync(&haptics->work);
145
146 if (haptics->arizona->dapm) {
147 component = snd_soc_dapm_to_component(haptics->arizona->dapm);
148 snd_soc_component_disable_pin(component, "HAPTICS");
149 }
150}
151
152static int arizona_haptics_probe(struct platform_device *pdev)
153{
154 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
155 struct arizona_haptics *haptics;
156 int ret;
157
158 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
159 if (!haptics)
160 return -ENOMEM;
161
162 haptics->arizona = arizona;
163
164 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
165 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
166 if (ret != 0) {
167 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
168 ret);
169 return ret;
170 }
171
172 INIT_WORK(&haptics->work, arizona_haptics_work);
173
174 haptics->input_dev = devm_input_allocate_device(&pdev->dev);
175 if (!haptics->input_dev) {
176 dev_err(arizona->dev, "Failed to allocate input device\n");
177 return -ENOMEM;
178 }
179
180 input_set_drvdata(haptics->input_dev, haptics);
181
182 haptics->input_dev->name = "arizona:haptics";
183 haptics->input_dev->close = arizona_haptics_close;
184 __set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
185
186 ret = input_ff_create_memless(haptics->input_dev, NULL,
187 arizona_haptics_play);
188 if (ret < 0) {
189 dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
190 ret);
191 return ret;
192 }
193
194 ret = input_register_device(haptics->input_dev);
195 if (ret < 0) {
196 dev_err(arizona->dev, "couldn't register input device: %d\n",
197 ret);
198 return ret;
199 }
200
201 return 0;
202}
203
204static struct platform_driver arizona_haptics_driver = {
205 .probe = arizona_haptics_probe,
206 .driver = {
207 .name = "arizona-haptics",
208 },
209};
210module_platform_driver(arizona_haptics_driver);
211
212MODULE_ALIAS("platform:arizona-haptics");
213MODULE_DESCRIPTION("Arizona haptics driver");
214MODULE_LICENSE("GPL");
215MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
216
