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.
46 #include "f_mass_storage.c"
48 /*-------------------------------------------------------------------------*/
49 USB_GADGET_COMPOSITE_OPTIONS();
51 static struct usb_device_descriptor device_desc = {
52 .bLength = sizeof device_desc,
53 .bDescriptorType = USB_DT_DEVICE,
55 .bcdUSB = cpu_to_le16(0x0200),
57 .bDeviceClass = USB_CLASS_MISC /* 0xEF */,
61 /* .bMaxPacketSize0 = f(hardware) */
63 /* Vendor and product id can be overridden by module parameters. */
64 .idVendor = cpu_to_le16(ACM_MS_VENDOR_NUM),
65 .idProduct = cpu_to_le16(ACM_MS_PRODUCT_NUM),
66 /* .bcdDevice = f(hardware) */
67 /* .iManufacturer = DYNAMIC */
68 /* .iProduct = DYNAMIC */
69 /* NO SERIAL NUMBER */
70 /*.bNumConfigurations = DYNAMIC*/
73 static struct usb_otg_descriptor otg_descriptor = {
74 .bLength = sizeof otg_descriptor,
75 .bDescriptorType = USB_DT_OTG,
78 * REVISIT SRP-only hardware is possible, although
79 * it would not be called "OTG" ...
81 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
84 static const struct usb_descriptor_header *otg_desc[] = {
85 (struct usb_descriptor_header *) &otg_descriptor,
89 /* string IDs are assigned dynamically */
90 static struct usb_string strings_dev[] = {
91 [USB_GADGET_MANUFACTURER_IDX].s = "",
92 [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
93 [USB_GADGET_SERIAL_IDX].s = "",
97 static struct usb_gadget_strings stringtab_dev = {
98 .language = 0x0409, /* en-us */
99 .strings = strings_dev,
102 static struct usb_gadget_strings *dev_strings[] = {
107 /****************************** Configurations ******************************/
109 static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
110 FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
112 static struct fsg_common fsg_common;
114 /*-------------------------------------------------------------------------*/
117 * We _always_ have both ACM and mass storage functions.
119 static int __init acm_ms_do_config(struct usb_configuration *c)
123 if (gadget_is_otg(c->cdev->gadget)) {
124 c->descriptors = otg_desc;
125 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
129 status = acm_bind_config(c, 0);
133 status = fsg_bind_config(c->cdev, c, &fsg_common);
140 static struct usb_configuration acm_ms_config_driver = {
141 .label = DRIVER_DESC,
142 .bConfigurationValue = 1,
143 /* .iConfiguration = DYNAMIC */
144 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
147 /*-------------------------------------------------------------------------*/
149 static int __init acm_ms_bind(struct usb_composite_dev *cdev)
151 struct usb_gadget *gadget = cdev->gadget;
155 /* set up serial link layer */
156 status = gserial_setup(cdev->gadget, 1);
160 /* set up mass storage function */
161 retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
163 status = PTR_ERR(retp);
168 * Allocate string descriptor numbers ... note that string
169 * contents can be overridden by the composite_dev glue.
171 status = usb_string_ids_tab(cdev, strings_dev);
174 device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
175 device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
177 /* register our configuration */
178 status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config);
182 usb_composite_overwrite_options(cdev, &coverwrite);
183 dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
185 fsg_common_put(&fsg_common);
190 fsg_common_put(&fsg_common);
196 static int __exit acm_ms_unbind(struct usb_composite_dev *cdev)
203 static __refdata struct usb_composite_driver acm_ms_driver = {
206 .max_speed = USB_SPEED_SUPER,
207 .strings = dev_strings,
209 .unbind = __exit_p(acm_ms_unbind),
212 MODULE_DESCRIPTION(DRIVER_DESC);
213 MODULE_AUTHOR("Klaus Schwarzkopf <schwarzkopf@sensortherm.de>");
214 MODULE_LICENSE("GPL v2");
216 static int __init init(void)
218 return usb_composite_probe(&acm_ms_driver);
222 static void __exit cleanup(void)
224 usb_composite_unregister(&acm_ms_driver);
226 module_exit(cleanup);