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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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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> |
15 | #include <linux/utsname.h> |
16 | |
17 | #include "u_audio.h" |
18 | |
19 | #define DRIVER_DESC "Linux USB Audio Gadget" |
20 | #define DRIVER_VERSION "Dec 18, 2008" |
21 | |
22 | /*-------------------------------------------------------------------------*/ |
23 | |
24 | /* |
25 | * Kbuild is not very cooperative with respect to linking separately |
26 | * compiled library objects into one module. So for now we won't use |
27 | * separate compilation ... ensuring init/exit sections work to shrink |
28 | * the runtime footprint, and giving us at least some parts of what |
29 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. |
30 | */ |
31 | #include "composite.c" |
32 | #include "usbstring.c" |
33 | #include "config.c" |
34 | #include "epautoconf.c" |
35 | |
36 | #include "u_audio.c" |
37 | #include "f_audio.c" |
38 | |
39 | /*-------------------------------------------------------------------------*/ |
40 | |
41 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! |
42 | * Instead: allocate your own, using normal USB-IF procedures. |
43 | */ |
44 | |
45 | /* Thanks to Linux Foundation for donating this product ID. */ |
46 | #define AUDIO_VENDOR_NUM 0x1d6b /* Linux Foundation */ |
47 | #define AUDIO_PRODUCT_NUM 0x0101 /* Linux-USB Audio Gadget */ |
48 | |
49 | /*-------------------------------------------------------------------------*/ |
50 | |
51 | static struct usb_device_descriptor device_desc = { |
52 | .bLength = sizeof device_desc, |
53 | .bDescriptorType = USB_DT_DEVICE, |
54 | |
55 | .bcdUSB = __constant_cpu_to_le16(0x200), |
56 | |
57 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
58 | .bDeviceSubClass = 0, |
59 | .bDeviceProtocol = 0, |
60 | /* .bMaxPacketSize0 = f(hardware) */ |
61 | |
62 | /* Vendor and product id defaults change according to what configs |
63 | * we support. (As does bNumConfigurations.) These values can |
64 | * also be overridden by module parameters. |
65 | */ |
66 | .idVendor = __constant_cpu_to_le16(AUDIO_VENDOR_NUM), |
67 | .idProduct = __constant_cpu_to_le16(AUDIO_PRODUCT_NUM), |
68 | /* .bcdDevice = f(hardware) */ |
69 | /* .iManufacturer = DYNAMIC */ |
70 | /* .iProduct = DYNAMIC */ |
71 | /* NO SERIAL NUMBER */ |
72 | .bNumConfigurations = 1, |
73 | }; |
74 | |
75 | static struct usb_otg_descriptor otg_descriptor = { |
76 | .bLength = sizeof otg_descriptor, |
77 | .bDescriptorType = USB_DT_OTG, |
78 | |
79 | /* REVISIT SRP-only hardware is possible, although |
80 | * it would not be called "OTG" ... |
81 | */ |
82 | .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, |
83 | }; |
84 | |
85 | static const struct usb_descriptor_header *otg_desc[] = { |
86 | (struct usb_descriptor_header *) &otg_descriptor, |
87 | NULL, |
88 | }; |
89 | |
90 | /*-------------------------------------------------------------------------*/ |
91 | |
92 | static int __init audio_do_config(struct usb_configuration *c) |
93 | { |
94 | /* FIXME alloc iConfiguration string, set it in c->strings */ |
95 | |
96 | if (gadget_is_otg(c->cdev->gadget)) { |
97 | c->descriptors = otg_desc; |
98 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; |
99 | } |
100 | |
101 | audio_bind_config(c); |
102 | |
103 | return 0; |
104 | } |
105 | |
106 | static struct usb_configuration audio_config_driver = { |
107 | .label = DRIVER_DESC, |
108 | .bConfigurationValue = 1, |
109 | /* .iConfiguration = DYNAMIC */ |
110 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, |
111 | }; |
112 | |
113 | /*-------------------------------------------------------------------------*/ |
114 | |
115 | static int __init audio_bind(struct usb_composite_dev *cdev) |
116 | { |
117 | int gcnum; |
118 | int status; |
119 | |
120 | gcnum = usb_gadget_controller_number(cdev->gadget); |
121 | if (gcnum >= 0) |
122 | device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum); |
123 | else { |
124 | ERROR(cdev, "controller '%s' not recognized; trying %s\n", |
125 | cdev->gadget->name, |
126 | audio_config_driver.label); |
127 | device_desc.bcdDevice = |
128 | __constant_cpu_to_le16(0x0300 | 0x0099); |
129 | } |
130 | |
131 | /* device descriptor strings: manufacturer, product */ |
132 | snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", |
133 | init_utsname()->sysname, init_utsname()->release, |
134 | cdev->gadget->name); |
135 | status = usb_string_id(cdev); |
136 | if (status < 0) |
137 | goto fail; |
138 | strings_dev[STRING_MANUFACTURER_IDX].id = status; |
139 | device_desc.iManufacturer = status; |
140 | |
141 | status = usb_string_id(cdev); |
142 | if (status < 0) |
143 | goto fail; |
144 | strings_dev[STRING_PRODUCT_IDX].id = status; |
145 | device_desc.iProduct = status; |
146 | |
147 | status = usb_add_config(cdev, &audio_config_driver, audio_do_config); |
148 | if (status < 0) |
149 | goto fail; |
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 | { |
160 | gaudio_cleanup(); |
161 | return 0; |
162 | } |
163 | |
164 | static struct usb_composite_driver audio_driver = { |
165 | .name = "g_audio", |
166 | .dev = &device_desc, |
167 | .strings = audio_strings, |
168 | .unbind = __exit_p(audio_unbind), |
169 | }; |
170 | |
171 | static int __init init(void) |
172 | { |
173 | return usb_composite_probe(&audio_driver, audio_bind); |
174 | } |
175 | module_init(init); |
176 | |
177 | static void __exit cleanup(void) |
178 | { |
179 | usb_composite_unregister(&audio_driver); |
180 | } |
181 | module_exit(cleanup); |
182 | |
183 | MODULE_DESCRIPTION(DRIVER_DESC); |
184 | MODULE_AUTHOR("Bryan Wu <cooloney@kernel.org>"); |
185 | MODULE_LICENSE("GPL"); |
186 | |
187 |
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