2 * acm_ms.c -- Composite driver, with ACM and mass storage support
4 * Copyright (C) 2008 David Brownell
5 * Copyright (C) 2008 Nokia Corporation
6 * Author: David Brownell
7 * Modified: Klaus Schwarzkopf <schwarzkopf@sensortherm.de>
9 * Heavily based on multi.c and cdc2.c
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
22 #define DRIVER_DESC "Composite Gadget (ACM + MS)"
23 #define DRIVER_VERSION "2011/10/10"
25 /*-------------------------------------------------------------------------*/
28 * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
29 * Instead: allocate your own, using normal USB-IF procedures.
31 #define ACM_MS_VENDOR_NUM 0x1d6b /* Linux Foundation */
32 #define ACM_MS_PRODUCT_NUM 0x0106 /* Composite Gadget: ACM + MS*/
34 /*-------------------------------------------------------------------------*/
37 * Kbuild is not very cooperative with respect to linking separately
38 * compiled library objects into one module. So for now we won't use
39 * separate compilation ... ensuring init/exit sections work to shrink
40 * the runtime footprint, and giving us at least some parts of what
41 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
43 #include "f_mass_storage.c"
45 /*-------------------------------------------------------------------------*/
46 USB_GADGET_COMPOSITE_OPTIONS();
48 static struct usb_device_descriptor device_desc = {
49 .bLength = sizeof device_desc,
50 .bDescriptorType = USB_DT_DEVICE,
52 .bcdUSB = cpu_to_le16(0x0200),
54 .bDeviceClass = USB_CLASS_MISC /* 0xEF */,
58 /* .bMaxPacketSize0 = f(hardware) */
60 /* Vendor and product id can be overridden by module parameters. */
61 .idVendor = cpu_to_le16(ACM_MS_VENDOR_NUM),
62 .idProduct = cpu_to_le16(ACM_MS_PRODUCT_NUM),
63 /* .bcdDevice = f(hardware) */
64 /* .iManufacturer = DYNAMIC */
65 /* .iProduct = DYNAMIC */
66 /* NO SERIAL NUMBER */
67 /*.bNumConfigurations = DYNAMIC*/
70 static struct usb_otg_descriptor otg_descriptor = {
71 .bLength = sizeof otg_descriptor,
72 .bDescriptorType = USB_DT_OTG,
75 * REVISIT SRP-only hardware is possible, although
76 * it would not be called "OTG" ...
78 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
81 static const struct usb_descriptor_header *otg_desc[] = {
82 (struct usb_descriptor_header *) &otg_descriptor,
86 /* string IDs are assigned dynamically */
87 static struct usb_string strings_dev[] = {
88 [USB_GADGET_MANUFACTURER_IDX].s = "",
89 [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
90 [USB_GADGET_SERIAL_IDX].s = "",
94 static struct usb_gadget_strings stringtab_dev = {
95 .language = 0x0409, /* en-us */
96 .strings = strings_dev,
99 static struct usb_gadget_strings *dev_strings[] = {
104 /****************************** Configurations ******************************/
106 static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
107 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
109 static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
114 * Number of buffers we will use.
115 * 2 is usually enough for good buffering pipeline
117 #define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
119 #endif /* CONFIG_USB_DEBUG */
121 FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
123 static struct fsg_common fsg_common;
125 /*-------------------------------------------------------------------------*/
126 static struct usb_function *f_acm;
127 static struct usb_function_instance *f_acm_inst;
129 * We _always_ have both ACM and mass storage functions.
131 static int __init acm_ms_do_config(struct usb_configuration *c)
135 if (gadget_is_otg(c->cdev->gadget)) {
136 c->descriptors = otg_desc;
137 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
140 f_acm_inst = usb_get_function_instance("acm");
141 if (IS_ERR(f_acm_inst))
142 return PTR_ERR(f_acm_inst);
144 f_acm = usb_get_function(f_acm_inst);
146 status = PTR_ERR(f_acm);
150 status = usb_add_function(c, f_acm);
154 status = fsg_bind_config(c->cdev, c, &fsg_common);
160 usb_remove_function(c, f_acm);
162 usb_put_function(f_acm);
164 usb_put_function_instance(f_acm_inst);
168 static struct usb_configuration acm_ms_config_driver = {
169 .label = DRIVER_DESC,
170 .bConfigurationValue = 1,
171 /* .iConfiguration = DYNAMIC */
172 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
175 /*-------------------------------------------------------------------------*/
177 static int __init acm_ms_bind(struct usb_composite_dev *cdev)
179 struct usb_gadget *gadget = cdev->gadget;
183 /* set up mass storage function */
184 retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data,
187 status = PTR_ERR(retp);
188 return PTR_ERR(retp);
192 * Allocate string descriptor numbers ... note that string
193 * contents can be overridden by the composite_dev glue.
195 status = usb_string_ids_tab(cdev, strings_dev);
198 device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
199 device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
201 /* register our configuration */
202 status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config);
206 usb_composite_overwrite_options(cdev, &coverwrite);
207 dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
209 fsg_common_put(&fsg_common);
214 fsg_common_put(&fsg_common);
218 static int __exit acm_ms_unbind(struct usb_composite_dev *cdev)
220 usb_put_function(f_acm);
221 usb_put_function_instance(f_acm_inst);
225 static __refdata struct usb_composite_driver acm_ms_driver = {
228 .max_speed = USB_SPEED_SUPER,
229 .strings = dev_strings,
231 .unbind = __exit_p(acm_ms_unbind),
234 MODULE_DESCRIPTION(DRIVER_DESC);
235 MODULE_AUTHOR("Klaus Schwarzkopf <schwarzkopf@sensortherm.de>");
236 MODULE_LICENSE("GPL v2");
238 static int __init init(void)
240 return usb_composite_probe(&acm_ms_driver);
244 static void __exit cleanup(void)
246 usb_composite_unregister(&acm_ms_driver);
248 module_exit(cleanup);