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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,
101 1 << ARIZONA_HAP_CTRL_SHIFT);
102 if (ret != 0) {
103 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
104 ret);
105 return;
106 }
107 }
108}
109
110static int arizona_haptics_play(struct input_dev *input, void *data,
111 struct ff_effect *effect)
112{
113 struct arizona_haptics *haptics = input_get_drvdata(input);
114 struct arizona *arizona = haptics->arizona;
115
116 if (!arizona->dapm) {
117 dev_err(arizona->dev, "No DAPM context\n");
118 return -EBUSY;
119 }
120
121 if (effect->u.rumble.strong_magnitude) {
122
123 if (arizona->pdata.hap_act) {
124 haptics->intensity =
125 effect->u.rumble.strong_magnitude >> 9;
126 if (effect->direction < 0x8000)
127 haptics->intensity += 0x7f;
128 } else {
129 haptics->intensity =
130 effect->u.rumble.strong_magnitude >> 8;
131 }
132 } else {
133 haptics->intensity = 0;
134 }
135
136 schedule_work(&haptics->work);
137
138 return 0;
139}
140
141static void arizona_haptics_close(struct input_dev *input)
142{
143 struct arizona_haptics *haptics = input_get_drvdata(input);
144
145 cancel_work_sync(&haptics->work);
146
147 if (haptics->arizona->dapm)
148 snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
149}
150
151static int arizona_haptics_probe(struct platform_device *pdev)
152{
153 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
154 struct arizona_haptics *haptics;
155 int ret;
156
157 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
158 if (!haptics)
159 return -ENOMEM;
160
161 haptics->arizona = arizona;
162
163 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
164 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
165 if (ret != 0) {
166 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
167 ret);
168 return ret;
169 }
170
171 INIT_WORK(&haptics->work, arizona_haptics_work);
172
173 haptics->input_dev = input_allocate_device();
174 if (haptics->input_dev == NULL) {
175 dev_err(arizona->dev, "Failed to allocate input device\n");
176 return -ENOMEM;
177 }
178
179 input_set_drvdata(haptics->input_dev, haptics);
180
181 haptics->input_dev->name = "arizona:haptics";
182 haptics->input_dev->dev.parent = pdev->dev.parent;
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 goto err_ialloc;
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 goto err_iff;
199 }
200
201 platform_set_drvdata(pdev, haptics);
202
203 return 0;
204
205err_iff:
206 if (haptics->input_dev)
207 input_ff_destroy(haptics->input_dev);
208err_ialloc:
209 input_free_device(haptics->input_dev);
210
211 return ret;
212}
213
214static int arizona_haptics_remove(struct platform_device *pdev)
215{
216 struct arizona_haptics *haptics = platform_get_drvdata(pdev);
217
218 input_unregister_device(haptics->input_dev);
219
220 return 0;
221}
222
223static struct platform_driver arizona_haptics_driver = {
224 .probe = arizona_haptics_probe,
225 .remove = arizona_haptics_remove,
226 .driver = {
227 .name = "arizona-haptics",
228 },
229};
230module_platform_driver(arizona_haptics_driver);
231
232MODULE_ALIAS("platform:arizona-haptics");
233MODULE_DESCRIPTION("Arizona haptics driver");
234MODULE_LICENSE("GPL");
235MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
236
