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Commit | Line | Data |
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c6994e6f BW |
1 | /* |
2 | * audio.c -- Audio gadget driver | |
3 | * | |
4 | * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> | |
5 | * Copyright (C) 2008 Analog Devices, Inc | |
6 | * | |
7 | * Enter bugs at http://blackfin.uclinux.org/ | |
8 | * | |
9 | * Licensed under the GPL-2 or later. | |
10 | */ | |
11 | ||
12 | /* #define VERBOSE_DEBUG */ | |
13 | ||
14 | #include <linux/kernel.h> | |
721e2e91 | 15 | #include <linux/module.h> |
7d16e8d3 | 16 | #include <linux/usb/composite.h> |
c6994e6f | 17 | |
dc995fc2 | 18 | #include "gadget_chips.h" |
c6994e6f | 19 | #define DRIVER_DESC "Linux USB Audio Gadget" |
132fcb46 | 20 | #define DRIVER_VERSION "Feb 2, 2012" |
c6994e6f | 21 | |
7d16e8d3 | 22 | USB_GADGET_COMPOSITE_OPTIONS(); |
c6994e6f | 23 | |
d747a916 JB |
24 | /* string IDs are assigned dynamically */ |
25 | ||
d747a916 | 26 | static struct usb_string strings_dev[] = { |
cc2683c3 | 27 | [USB_GADGET_MANUFACTURER_IDX].s = "", |
276e2e4f SAS |
28 | [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC, |
29 | [USB_GADGET_SERIAL_IDX].s = "", | |
d747a916 JB |
30 | { } /* end of list */ |
31 | }; | |
32 | ||
33 | static struct usb_gadget_strings stringtab_dev = { | |
34 | .language = 0x0409, /* en-us */ | |
35 | .strings = strings_dev, | |
36 | }; | |
37 | ||
38 | static struct usb_gadget_strings *audio_strings[] = { | |
39 | &stringtab_dev, | |
40 | NULL, | |
41 | }; | |
42 | ||
132fcb46 JB |
43 | #ifdef CONFIG_GADGET_UAC1 |
44 | #include "u_uac1.h" | |
18b5b3b5 JB |
45 | #include "u_uac1.c" |
46 | #include "f_uac1.c" | |
132fcb46 JB |
47 | #else |
48 | #include "f_uac2.c" | |
49 | #endif | |
c6994e6f BW |
50 | |
51 | /*-------------------------------------------------------------------------*/ | |
52 | ||
53 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
54 | * Instead: allocate your own, using normal USB-IF procedures. | |
55 | */ | |
56 | ||
05cbc2d5 GKH |
57 | /* Thanks to Linux Foundation for donating this product ID. */ |
58 | #define AUDIO_VENDOR_NUM 0x1d6b /* Linux Foundation */ | |
59 | #define AUDIO_PRODUCT_NUM 0x0101 /* Linux-USB Audio Gadget */ | |
c6994e6f BW |
60 | |
61 | /*-------------------------------------------------------------------------*/ | |
62 | ||
63 | static struct usb_device_descriptor device_desc = { | |
64 | .bLength = sizeof device_desc, | |
65 | .bDescriptorType = USB_DT_DEVICE, | |
66 | ||
67 | .bcdUSB = __constant_cpu_to_le16(0x200), | |
68 | ||
132fcb46 | 69 | #ifdef CONFIG_GADGET_UAC1 |
c6994e6f BW |
70 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
71 | .bDeviceSubClass = 0, | |
72 | .bDeviceProtocol = 0, | |
132fcb46 JB |
73 | #else |
74 | .bDeviceClass = USB_CLASS_MISC, | |
75 | .bDeviceSubClass = 0x02, | |
76 | .bDeviceProtocol = 0x01, | |
77 | #endif | |
c6994e6f BW |
78 | /* .bMaxPacketSize0 = f(hardware) */ |
79 | ||
80 | /* Vendor and product id defaults change according to what configs | |
81 | * we support. (As does bNumConfigurations.) These values can | |
82 | * also be overridden by module parameters. | |
83 | */ | |
84 | .idVendor = __constant_cpu_to_le16(AUDIO_VENDOR_NUM), | |
85 | .idProduct = __constant_cpu_to_le16(AUDIO_PRODUCT_NUM), | |
86 | /* .bcdDevice = f(hardware) */ | |
87 | /* .iManufacturer = DYNAMIC */ | |
88 | /* .iProduct = DYNAMIC */ | |
89 | /* NO SERIAL NUMBER */ | |
90 | .bNumConfigurations = 1, | |
91 | }; | |
92 | ||
93 | static struct usb_otg_descriptor otg_descriptor = { | |
94 | .bLength = sizeof otg_descriptor, | |
95 | .bDescriptorType = USB_DT_OTG, | |
96 | ||
97 | /* REVISIT SRP-only hardware is possible, although | |
98 | * it would not be called "OTG" ... | |
99 | */ | |
100 | .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, | |
101 | }; | |
102 | ||
103 | static const struct usb_descriptor_header *otg_desc[] = { | |
104 | (struct usb_descriptor_header *) &otg_descriptor, | |
105 | NULL, | |
106 | }; | |
107 | ||
108 | /*-------------------------------------------------------------------------*/ | |
109 | ||
e12995ec | 110 | static int __init audio_do_config(struct usb_configuration *c) |
c6994e6f BW |
111 | { |
112 | /* FIXME alloc iConfiguration string, set it in c->strings */ | |
113 | ||
114 | if (gadget_is_otg(c->cdev->gadget)) { | |
115 | c->descriptors = otg_desc; | |
116 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
117 | } | |
118 | ||
119 | audio_bind_config(c); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static struct usb_configuration audio_config_driver = { | |
125 | .label = DRIVER_DESC, | |
c6994e6f BW |
126 | .bConfigurationValue = 1, |
127 | /* .iConfiguration = DYNAMIC */ | |
128 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
132fcb46 JB |
129 | #ifndef CONFIG_GADGET_UAC1 |
130 | .unbind = uac2_unbind_config, | |
131 | #endif | |
c6994e6f BW |
132 | }; |
133 | ||
134 | /*-------------------------------------------------------------------------*/ | |
135 | ||
e12995ec | 136 | static int __init audio_bind(struct usb_composite_dev *cdev) |
c6994e6f | 137 | { |
c6994e6f BW |
138 | int status; |
139 | ||
e1f15ccb | 140 | status = usb_string_ids_tab(cdev, strings_dev); |
c6994e6f BW |
141 | if (status < 0) |
142 | goto fail; | |
276e2e4f SAS |
143 | device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id; |
144 | device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; | |
c6994e6f | 145 | |
c9bfff9c | 146 | status = usb_add_config(cdev, &audio_config_driver, audio_do_config); |
c6994e6f BW |
147 | if (status < 0) |
148 | goto fail; | |
7d16e8d3 | 149 | usb_composite_overwrite_options(cdev, &coverwrite); |
c6994e6f BW |
150 | |
151 | INFO(cdev, "%s, version: %s\n", DRIVER_DESC, DRIVER_VERSION); | |
152 | return 0; | |
153 | ||
154 | fail: | |
155 | return status; | |
156 | } | |
157 | ||
158 | static int __exit audio_unbind(struct usb_composite_dev *cdev) | |
159 | { | |
132fcb46 | 160 | #ifdef CONFIG_GADGET_UAC1 |
feef1d95 | 161 | gaudio_cleanup(); |
132fcb46 | 162 | #endif |
c6994e6f BW |
163 | return 0; |
164 | } | |
165 | ||
c2ec75c2 | 166 | static __refdata struct usb_composite_driver audio_driver = { |
c6994e6f BW |
167 | .name = "g_audio", |
168 | .dev = &device_desc, | |
169 | .strings = audio_strings, | |
35a0e0bf | 170 | .max_speed = USB_SPEED_HIGH, |
03e42bd5 | 171 | .bind = audio_bind, |
c6994e6f BW |
172 | .unbind = __exit_p(audio_unbind), |
173 | }; | |
174 | ||
909346a8 | 175 | module_usb_composite_driver(audio_driver); |
c6994e6f BW |
176 | |
177 | MODULE_DESCRIPTION(DRIVER_DESC); | |
178 | MODULE_AUTHOR("Bryan Wu <cooloney@kernel.org>"); | |
179 | MODULE_LICENSE("GPL"); | |
180 |