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13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/input.h>
16#include <linux/slab.h>
17
18#include <sound/soc.h>
19#include <sound/soc-dapm.h>
20
21#include <linux/mfd/arizona/core.h>
22#include <linux/mfd/arizona/pdata.h>
23#include <linux/mfd/arizona/registers.h>
24
25struct arizona_haptics {
26 struct arizona *arizona;
27 struct input_dev *input_dev;
28 struct work_struct work;
29
30 struct mutex mutex;
31 u8 intensity;
32};
33
34static void arizona_haptics_work(struct work_struct *work)
35{
36 struct arizona_haptics *haptics = container_of(work,
37 struct arizona_haptics,
38 work);
39 struct arizona *arizona = haptics->arizona;
40 struct mutex *dapm_mutex = &arizona->dapm->card->dapm_mutex;
41 int ret;
42
43 if (!haptics->arizona->dapm) {
44 dev_err(arizona->dev, "No DAPM context\n");
45 return;
46 }
47
48 if (haptics->intensity) {
49 ret = regmap_update_bits(arizona->regmap,
50 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
51 ARIZONA_PHASE2_INTENSITY_MASK,
52 haptics->intensity);
53 if (ret != 0) {
54 dev_err(arizona->dev, "Failed to set intensity: %d\n",
55 ret);
56 return;
57 }
58
59
60 ret = regmap_update_bits(arizona->regmap,
61 ARIZONA_HAPTICS_CONTROL_1,
62 ARIZONA_HAP_CTRL_MASK,
63 1 << ARIZONA_HAP_CTRL_SHIFT);
64 if (ret != 0) {
65 dev_err(arizona->dev, "Failed to start haptics: %d\n",
66 ret);
67 return;
68 }
69
70 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
71
72 ret = snd_soc_dapm_enable_pin(arizona->dapm, "HAPTICS");
73 if (ret != 0) {
74 dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
75 ret);
76 mutex_unlock(dapm_mutex);
77 return;
78 }
79
80 ret = snd_soc_dapm_sync(arizona->dapm);
81 if (ret != 0) {
82 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
83 ret);
84 mutex_unlock(dapm_mutex);
85 return;
86 }
87
88 mutex_unlock(dapm_mutex);
89
90 } else {
91
92 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
93
94 ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
95 if (ret != 0) {
96 dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
97 ret);
98 mutex_unlock(dapm_mutex);
99 return;
100 }
101
102 ret = snd_soc_dapm_sync(arizona->dapm);
103 if (ret != 0) {
104 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
105 ret);
106 mutex_unlock(dapm_mutex);
107 return;
108 }
109
110 mutex_unlock(dapm_mutex);
111
112 ret = regmap_update_bits(arizona->regmap,
113 ARIZONA_HAPTICS_CONTROL_1,
114 ARIZONA_HAP_CTRL_MASK,
115 1 << ARIZONA_HAP_CTRL_SHIFT);
116 if (ret != 0) {
117 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
118 ret);
119 return;
120 }
121 }
122}
123
124static int arizona_haptics_play(struct input_dev *input, void *data,
125 struct ff_effect *effect)
126{
127 struct arizona_haptics *haptics = input_get_drvdata(input);
128 struct arizona *arizona = haptics->arizona;
129
130 if (!arizona->dapm) {
131 dev_err(arizona->dev, "No DAPM context\n");
132 return -EBUSY;
133 }
134
135 if (effect->u.rumble.strong_magnitude) {
136
137 if (arizona->pdata.hap_act) {
138 haptics->intensity =
139 effect->u.rumble.strong_magnitude >> 9;
140 if (effect->direction < 0x8000)
141 haptics->intensity += 0x7f;
142 } else {
143 haptics->intensity =
144 effect->u.rumble.strong_magnitude >> 8;
145 }
146 } else {
147 haptics->intensity = 0;
148 }
149
150 schedule_work(&haptics->work);
151
152 return 0;
153}
154
155static void arizona_haptics_close(struct input_dev *input)
156{
157 struct arizona_haptics *haptics = input_get_drvdata(input);
158 struct mutex *dapm_mutex = &haptics->arizona->dapm->card->dapm_mutex;
159
160 cancel_work_sync(&haptics->work);
161
162 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
163
164 if (haptics->arizona->dapm)
165 snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
166
167 mutex_unlock(dapm_mutex);
168}
169
170static int arizona_haptics_probe(struct platform_device *pdev)
171{
172 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
173 struct arizona_haptics *haptics;
174 int ret;
175
176 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
177 if (!haptics)
178 return -ENOMEM;
179
180 haptics->arizona = arizona;
181
182 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
183 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
184 if (ret != 0) {
185 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
186 ret);
187 return ret;
188 }
189
190 INIT_WORK(&haptics->work, arizona_haptics_work);
191
192 haptics->input_dev = input_allocate_device();
193 if (haptics->input_dev == NULL) {
194 dev_err(arizona->dev, "Failed to allocate input device\n");
195 return -ENOMEM;
196 }
197
198 input_set_drvdata(haptics->input_dev, haptics);
199
200 haptics->input_dev->name = "arizona:haptics";
201 haptics->input_dev->dev.parent = pdev->dev.parent;
202 haptics->input_dev->close = arizona_haptics_close;
203 __set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
204
205 ret = input_ff_create_memless(haptics->input_dev, NULL,
206 arizona_haptics_play);
207 if (ret < 0) {
208 dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
209 ret);
210 goto err_ialloc;
211 }
212
213 ret = input_register_device(haptics->input_dev);
214 if (ret < 0) {
215 dev_err(arizona->dev, "couldn't register input device: %d\n",
216 ret);
217 goto err_iff;
218 }
219
220 platform_set_drvdata(pdev, haptics);
221
222 return 0;
223
224err_iff:
225 if (haptics->input_dev)
226 input_ff_destroy(haptics->input_dev);
227err_ialloc:
228 input_free_device(haptics->input_dev);
229
230 return ret;
231}
232
233static int arizona_haptics_remove(struct platform_device *pdev)
234{
235 struct arizona_haptics *haptics = platform_get_drvdata(pdev);
236
237 input_unregister_device(haptics->input_dev);
238
239 return 0;
240}
241
242static struct platform_driver arizona_haptics_driver = {
243 .probe = arizona_haptics_probe,
244 .remove = arizona_haptics_remove,
245 .driver = {
246 .name = "arizona-haptics",
247 .owner = THIS_MODULE,
248 },
249};
250module_platform_driver(arizona_haptics_driver);
251
252MODULE_ALIAS("platform:arizona-haptics");
253MODULE_DESCRIPTION("Arizona haptics driver");
254MODULE_LICENSE("GPL");
255MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
256
