diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/usb/gadget/Makefile | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/acm_ms.c | 256 |
3 files changed, 268 insertions, 0 deletions
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index a60b472a0b3..b21cd376c11 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -873,6 +873,16 @@ config USB_G_NOKIA It's only really useful for N900 hardware. If you're building a kernel for N900, say Y or M here. If unsure, say N. +config USB_G_ACM_MS + tristate "CDC Composite Device (ACM and mass storage)" + depends on BLOCK + help + This driver provides two functions in one configuration: + a mass storage, and a CDC ACM (serial port) link. + + Say "y" to link the driver statically, or "m" to build a + dynamically linked module called "g_acm_ms". + config USB_G_MULTI tristate "Multifunction Composite Gadget (EXPERIMENTAL)" depends on BLOCK && NET diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile index c36da63009d..b54ac619089 100644 --- a/drivers/usb/gadget/Makefile +++ b/drivers/usb/gadget/Makefile @@ -51,6 +51,7 @@ g_dbgp-y := dbgp.o g_nokia-y := nokia.o g_webcam-y := webcam.o g_ncm-y := ncm.o +g_acm_ms-y := acm_ms.o obj-$(CONFIG_USB_ZERO) += g_zero.o obj-$(CONFIG_USB_AUDIO) += g_audio.o @@ -69,3 +70,4 @@ obj-$(CONFIG_USB_G_MULTI) += g_multi.o obj-$(CONFIG_USB_G_NOKIA) += g_nokia.o obj-$(CONFIG_USB_G_WEBCAM) += g_webcam.o obj-$(CONFIG_USB_G_NCM) += g_ncm.o +obj-$(CONFIG_USB_G_ACM_MS) += g_acm_ms.o diff --git a/drivers/usb/gadget/acm_ms.c b/drivers/usb/gadget/acm_ms.c new file mode 100644 index 00000000000..fdb7aec3bd0 --- /dev/null +++ b/drivers/usb/gadget/acm_ms.c @@ -0,0 +1,256 @@ +/* + * acm_ms.c -- Composite driver, with ACM and mass storage support + * + * Copyright (C) 2008 David Brownell + * Copyright (C) 2008 Nokia Corporation + * Author: David Brownell + * Modified: Klaus Schwarzkopf <schwarzkopf@sensortherm.de> + * + * Heavily based on multi.c and cdc2.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/utsname.h> + +#include "u_serial.h" + +#define DRIVER_DESC "Composite Gadget (ACM + MS)" +#define DRIVER_VERSION "2011/10/10" + +/*-------------------------------------------------------------------------*/ + +/* + * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! + * Instead: allocate your own, using normal USB-IF procedures. + */ +#define ACM_MS_VENDOR_NUM 0x1d6b /* Linux Foundation */ +#define ACM_MS_PRODUCT_NUM 0x0106 /* Composite Gadget: ACM + MS*/ + +/*-------------------------------------------------------------------------*/ + +/* + * Kbuild is not very cooperative with respect to linking separately + * compiled library objects into one module. So for now we won't use + * separate compilation ... ensuring init/exit sections work to shrink + * the runtime footprint, and giving us at least some parts of what + * a "gcc --combine ... part1.c part2.c part3.c ... " build would. + */ + +#include "composite.c" +#include "usbstring.c" +#include "config.c" +#include "epautoconf.c" +#include "u_serial.c" +#include "f_acm.c" +#include "f_mass_storage.c" + +/*-------------------------------------------------------------------------*/ + +static struct usb_device_descriptor device_desc = { + .bLength = sizeof device_desc, + .bDescriptorType = USB_DT_DEVICE, + + .bcdUSB = cpu_to_le16(0x0200), + + .bDeviceClass = USB_CLASS_MISC /* 0xEF */, + .bDeviceSubClass = 2, + .bDeviceProtocol = 1, + + /* .bMaxPacketSize0 = f(hardware) */ + + /* Vendor and product id can be overridden by module parameters. */ + .idVendor = cpu_to_le16(ACM_MS_VENDOR_NUM), + .idProduct = cpu_to_le16(ACM_MS_PRODUCT_NUM), + /* .bcdDevice = f(hardware) */ + /* .iManufacturer = DYNAMIC */ + /* .iProduct = DYNAMIC */ + /* NO SERIAL NUMBER */ + /*.bNumConfigurations = DYNAMIC*/ +}; + +static struct usb_otg_descriptor otg_descriptor = { + .bLength = sizeof otg_descriptor, + .bDescriptorType = USB_DT_OTG, + + /* + * REVISIT SRP-only hardware is possible, although + * it would not be called "OTG" ... + */ + .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, +}; + +static const struct usb_descriptor_header *otg_desc[] = { + (struct usb_descriptor_header *) &otg_descriptor, + NULL, +}; + + +/* string IDs are assigned dynamically */ + +#define STRING_MANUFACTURER_IDX 0 +#define STRING_PRODUCT_IDX 1 + +static char manufacturer[50]; + +static struct usb_string strings_dev[] = { + [STRING_MANUFACTURER_IDX].s = manufacturer, + [STRING_PRODUCT_IDX].s = DRIVER_DESC, + { } /* end of list */ +}; + +static struct usb_gadget_strings stringtab_dev = { + .language = 0x0409, /* en-us */ + .strings = strings_dev, +}; + +static struct usb_gadget_strings *dev_strings[] = { + &stringtab_dev, + NULL, +}; + +/****************************** Configurations ******************************/ + +static struct fsg_module_parameters fsg_mod_data = { .stall = 1 }; +FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data); + +static struct fsg_common fsg_common; + +/*-------------------------------------------------------------------------*/ + +/* + * We _always_ have both ACM and mass storage functions. + */ +static int __init acm_ms_do_config(struct usb_configuration *c) +{ + int status; + + if (gadget_is_otg(c->cdev->gadget)) { + c->descriptors = otg_desc; + c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; + } + + + status = acm_bind_config(c, 0); + if (status < 0) + return status; + + status = fsg_bind_config(c->cdev, c, &fsg_common); + if (status < 0) + return status; + + return 0; +} + +static struct usb_configuration acm_ms_config_driver = { + .label = DRIVER_DESC, + .bConfigurationValue = 1, + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, +}; + +/*-------------------------------------------------------------------------*/ + +static int __init acm_ms_bind(struct usb_composite_dev *cdev) +{ + int gcnum; + struct usb_gadget *gadget = cdev->gadget; + int status; + void *retp; + + /* set up serial link layer */ + status = gserial_setup(cdev->gadget, 1); + if (status < 0) + return status; + + /* set up mass storage function */ + retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data); + if (IS_ERR(retp)) { + status = PTR_ERR(retp); + goto fail0; + } + + /* set bcdDevice */ + gcnum = usb_gadget_controller_number(gadget); + if (gcnum >= 0) { + device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum); + } else { + WARNING(cdev, "controller '%s' not recognized; trying %s\n", + gadget->name, + acm_ms_config_driver.label); + device_desc.bcdDevice = + cpu_to_le16(0x0300 | 0x0099); + } + + /* + * Allocate string descriptor numbers ... note that string + * contents can be overridden by the composite_dev glue. + */ + + /* device descriptor strings: manufacturer, product */ + snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", + init_utsname()->sysname, init_utsname()->release, + gadget->name); + status = usb_string_id(cdev); + if (status < 0) + goto fail1; + strings_dev[STRING_MANUFACTURER_IDX].id = status; + device_desc.iManufacturer = status; + + status = usb_string_id(cdev); + if (status < 0) + goto fail1; + strings_dev[STRING_PRODUCT_IDX].id = status; + device_desc.iProduct = status; + + /* register our configuration */ + status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config); + if (status < 0) + goto fail1; + + dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n", + DRIVER_DESC); + fsg_common_put(&fsg_common); + return 0; + + /* error recovery */ +fail1: + fsg_common_put(&fsg_common); +fail0: + gserial_cleanup(); + return status; +} + +static int __exit acm_ms_unbind(struct usb_composite_dev *cdev) +{ + gserial_cleanup(); + + return 0; +} + +static struct usb_composite_driver acm_ms_driver = { + .name = "g_acm_ms", + .dev = &device_desc, + .strings = dev_strings, + .unbind = __exit_p(acm_ms_unbind), +}; + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Klaus Schwarzkopf <schwarzkopf@sensortherm.de>"); +MODULE_LICENSE("GPL v2"); + +static int __init init(void) +{ + return usb_composite_probe(&acm_ms_driver, acm_ms_bind); +} +module_init(init); + +static void __exit cleanup(void) +{ + usb_composite_unregister(&acm_ms_driver); +} +module_exit(cleanup); |