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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 int ret;
41
42 if (!haptics->arizona->dapm) {
43 dev_err(arizona->dev, "No DAPM context\n");
44 return;
45 }
46
47 if (haptics->intensity) {
48 ret = regmap_update_bits(arizona->regmap,
49 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
50 ARIZONA_PHASE2_INTENSITY_MASK,
51 haptics->intensity);
52 if (ret != 0) {
53 dev_err(arizona->dev, "Failed to set intensity: %d\n",
54 ret);
55 return;
56 }
57
58
59 ret = regmap_update_bits(arizona->regmap,
60 ARIZONA_HAPTICS_CONTROL_1,
61 ARIZONA_HAP_CTRL_MASK,
62 1 << ARIZONA_HAP_CTRL_SHIFT);
63 if (ret != 0) {
64 dev_err(arizona->dev, "Failed to start haptics: %d\n",
65 ret);
66 return;
67 }
68
69 ret = snd_soc_dapm_enable_pin(arizona->dapm, "HAPTICS");
70 if (ret != 0) {
71 dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
72 ret);
73 return;
74 }
75
76 ret = snd_soc_dapm_sync(arizona->dapm);
77 if (ret != 0) {
78 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
79 ret);
80 return;
81 }
82 } else {
83
84 ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
85 if (ret != 0) {
86 dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
87 ret);
88 return;
89 }
90
91 ret = snd_soc_dapm_sync(arizona->dapm);
92 if (ret != 0) {
93 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
94 ret);
95 return;
96 }
97
98 ret = regmap_update_bits(arizona->regmap,
99 ARIZONA_HAPTICS_CONTROL_1,
100 ARIZONA_HAP_CTRL_MASK, 0);
101 if (ret != 0) {
102 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
103 ret);
104 return;
105 }
106 }
107}
108
109static int arizona_haptics_play(struct input_dev *input, void *data,
110 struct ff_effect *effect)
111{
112 struct arizona_haptics *haptics = input_get_drvdata(input);
113 struct arizona *arizona = haptics->arizona;
114
115 if (!arizona->dapm) {
116 dev_err(arizona->dev, "No DAPM context\n");
117 return -EBUSY;
118 }
119
120 if (effect->u.rumble.strong_magnitude) {
121
122 if (arizona->pdata.hap_act) {
123 haptics->intensity =
124 effect->u.rumble.strong_magnitude >> 9;
125 if (effect->direction < 0x8000)
126 haptics->intensity += 0x7f;
127 } else {
128 haptics->intensity =
129 effect->u.rumble.strong_magnitude >> 8;
130 }
131 } else {
132 haptics->intensity = 0;
133 }
134
135 schedule_work(&haptics->work);
136
137 return 0;
138}
139
140static void arizona_haptics_close(struct input_dev *input)
141{
142 struct arizona_haptics *haptics = input_get_drvdata(input);
143
144 cancel_work_sync(&haptics->work);
145
146 if (haptics->arizona->dapm)
147 snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
148}
149
150static int arizona_haptics_probe(struct platform_device *pdev)
151{
152 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
153 struct arizona_haptics *haptics;
154 int ret;
155
156 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
157 if (!haptics)
158 return -ENOMEM;
159
160 haptics->arizona = arizona;
161
162 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
163 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
164 if (ret != 0) {
165 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
166 ret);
167 return ret;
168 }
169
170 INIT_WORK(&haptics->work, arizona_haptics_work);
171
172 haptics->input_dev = devm_input_allocate_device(&pdev->dev);
173 if (!haptics->input_dev) {
174 dev_err(arizona->dev, "Failed to allocate input device\n");
175 return -ENOMEM;
176 }
177
178 input_set_drvdata(haptics->input_dev, haptics);
179
180 haptics->input_dev->name = "arizona:haptics";
181 haptics->input_dev->close = arizona_haptics_close;
182 __set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
183
184 ret = input_ff_create_memless(haptics->input_dev, NULL,
185 arizona_haptics_play);
186 if (ret < 0) {
187 dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
188 ret);
189 return ret;
190 }
191
192 ret = input_register_device(haptics->input_dev);
193 if (ret < 0) {
194 dev_err(arizona->dev, "couldn't register input device: %d\n",
195 ret);
196 return ret;
197 }
198
199 platform_set_drvdata(pdev, haptics);
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
