]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Arizona haptics driver | |
3 | * | |
4 | * Copyright 2012 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
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 | ||
25 | struct 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 | ||
34 | static 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 | /* This enable sequence will be a noop if already enabled */ | |
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 | /* This disable sequence will be a noop if already enabled */ | |
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 | ||
109 | static 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 | /* Scale the magnitude into the range the device supports */ | |
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 | ||
140 | static 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 | ||
150 | static 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 | ||
204 | static struct platform_driver arizona_haptics_driver = { | |
205 | .probe = arizona_haptics_probe, | |
206 | .driver = { | |
207 | .name = "arizona-haptics", | |
208 | }, | |
209 | }; | |
210 | module_platform_driver(arizona_haptics_driver); | |
211 | ||
212 | MODULE_ALIAS("platform:arizona-haptics"); | |
213 | MODULE_DESCRIPTION("Arizona haptics driver"); | |
214 | MODULE_LICENSE("GPL"); | |
215 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |