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USB: gadget: g_multi: code clean up and refactoring 

The Multifunction Composite Gadget have been cleaned up
and refactored so hopefully it looks prettier and works
at least as good as before changes.

A Kconfig has also been fixed to make it impossible to build
FunctionFS gadget with no configurations.  With this patch, if
RNDIS is not chosen by the user CDC is force-selected.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michal Nazarewicz 2010-06-21 13:57:03 +02:00 committed by Greg Kroah-Hartman
parent 248720529c
commit 279cc49a69
2 changed files with 147 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/gadget/Kconfig
View File

@ -863,6 +863,7 @@ config USB_G_NOKIA
config USB_G_MULTI
tristate "Multifunction Composite Gadget (EXPERIMENTAL)"
depends on BLOCK && NET
select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
help
The Multifunction Composite Gadget provides Ethernet (RNDIS
and/or CDC Ethernet), mass storage and ACM serial link

262
drivers/usb/gadget/multi.c
View File

@ -24,6 +24,7 @@
#include <linux/kernel.h>
#include <linux/utsname.h>
#include <linux/module.h>
#if defined USB_ETH_RNDIS
@ -35,14 +36,13 @@
#define DRIVER_DESC "Multifunction Composite Gadget"
#define DRIVER_VERSION "2009/07/21"
/*-------------------------------------------------------------------------*/
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Michal Nazarewicz");
MODULE_LICENSE("GPL");
#define MULTI_VENDOR_NUM 0x0525 /* XXX NetChip */
#define MULTI_PRODUCT_NUM 0xa4ab /* XXX */
/*-------------------------------------------------------------------------*/
/***************************** All the files... *****************************/
/*
* kbuild is not very cooperative with respect to linking separately
@ -57,6 +57,8 @@
#include "config.c"
#include "epautoconf.c"
#include "f_mass_storage.c"
#include "u_serial.c"
#include "f_acm.c"
@ -68,13 +70,24 @@
#endif
#include "u_ether.c"
#undef DBG /* u_ether.c has broken idea about macros */
#undef VDBG /* so clean up after it */
#undef ERROR
#undef INFO
#include "f_mass_storage.c"
/*-------------------------------------------------------------------------*/
/***************************** Device Descriptor ****************************/
#define MULTI_VENDOR_NUM 0x0525 /* XXX NetChip */
#define MULTI_PRODUCT_NUM 0xa4ab /* XXX */
enum {
__MULTI_NO_CONFIG,
#ifdef CONFIG_USB_G_MULTI_RNDIS
MULTI_RNDIS_CONFIG_NUM,
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
MULTI_CDC_CONFIG_NUM,
#endif
};
static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
@ -82,80 +95,82 @@ static struct usb_device_descriptor device_desc = {
.bcdUSB = cpu_to_le16(0x0200),
/* .bDeviceClass = USB_CLASS_COMM, */
/* .bDeviceSubClass = 0, */
/* .bDeviceProtocol = 0, */
.bDeviceClass = 0xEF,
.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(MULTI_VENDOR_NUM),
.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
/* .bcdDevice = f(hardware) */
/* .iManufacturer = DYNAMIC */
/* .iProduct = DYNAMIC */
/* NO SERIAL NUMBER */
.bNumConfigurations = 1,
};
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,
(struct usb_descriptor_header *) &(struct usb_otg_descriptor){
.bLength = sizeof(struct usb_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,
},
NULL,
};
/* string IDs are assigned dynamically */
#define STRING_MANUFACTURER_IDX 0
#define STRING_PRODUCT_IDX 1
enum {
MULTI_STRING_MANUFACTURER_IDX,
MULTI_STRING_PRODUCT_IDX,
#ifdef CONFIG_USB_G_MULTI_RNDIS
MULTI_STRING_RNDIS_CONFIG_IDX,
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
MULTI_STRING_CDC_CONFIG_IDX,
#endif
};
static char manufacturer[50];
static struct usb_string strings_dev[] = {
[STRING_MANUFACTURER_IDX].s = manufacturer,
[STRING_PRODUCT_IDX].s = DRIVER_DESC,
[MULTI_STRING_MANUFACTURER_IDX].s = manufacturer,
[MULTI_STRING_PRODUCT_IDX].s = DRIVER_DESC,
#ifdef CONFIG_USB_G_MULTI_RNDIS
[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
#endif
{ } /* 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,
&(struct usb_gadget_strings){
.language = 0x0409, /* en-us */
.strings = strings_dev,
},
NULL,
};
static u8 hostaddr[ETH_ALEN];
/****************************** Configurations ******************************/
static struct fsg_module_parameters mod_data = {
.stall = 1
};
FSG_MODULE_PARAMETERS(/* no prefix */, mod_data);
static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
static struct fsg_common *fsg_common;
static struct fsg_common fsg_common;
static u8 hostaddr[ETH_ALEN];
/********** RNDIS **********/
#ifdef USB_ETH_RNDIS
static int __init rndis_do_config(struct usb_configuration *c)
static __ref int rndis_do_config(struct usb_configuration *c)
{
int ret;
@ -172,26 +187,42 @@ static int __init rndis_do_config(struct usb_configuration *c)
if (ret < 0)
return ret;
ret = fsg_bind_config(c->cdev, c, fsg_common);
ret = fsg_bind_config(c->cdev, c, &fsg_common);
if (ret < 0)
return ret;
return 0;
}
static struct usb_configuration rndis_config_driver = {
.label = "Multifunction Composite (RNDIS + MS + ACM)",
.bind = rndis_do_config,
.bConfigurationValue = 2,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
static int rndis_config_register(struct usb_composite_dev *cdev)
{
static struct usb_configuration config = {
.bind = rndis_do_config,
.bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
return usb_add_config(cdev, &config);
}
#else
static int rndis_config_register(struct usb_composite_dev *cdev)
{
return 0;
}
#endif
/********** CDC ECM **********/
#ifdef CONFIG_USB_G_MULTI_CDC
static int __init cdc_do_config(struct usb_configuration *c)
static __ref int cdc_do_config(struct usb_configuration *c)
{
int ret;
@ -208,20 +239,33 @@ static int __init cdc_do_config(struct usb_configuration *c)
if (ret < 0)
return ret;
ret = fsg_bind_config(c->cdev, c, fsg_common);
ret = fsg_bind_config(c->cdev, c, &fsg_common);
if (ret < 0)
return ret;
return 0;
}
static struct usb_configuration cdc_config_driver = {
.label = "Multifunction Composite (CDC + MS + ACM)",
.bind = cdc_do_config,
.bConfigurationValue = 1,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
static int cdc_config_register(struct usb_composite_dev *cdev)
{
static struct usb_configuration config = {
.bind = cdc_do_config,
.bConfigurationValue = MULTI_CDC_CONFIG_NUM,
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
return usb_add_config(cdev, &config);
}
#else
static int cdc_config_register(struct usb_composite_dev *cdev)
{
return 0;
}
#endif
@ -230,7 +274,7 @@ static struct usb_configuration cdc_config_driver = {
/****************************** Gadget Bind ******************************/
static int __init multi_bind(struct usb_composite_dev *cdev)
static int __ref multi_bind(struct usb_composite_dev *cdev)
{
struct usb_gadget *gadget = cdev->gadget;
int status, gcnum;
@ -252,67 +296,56 @@ static int __init multi_bind(struct usb_composite_dev *cdev)
goto fail0;
/* set up mass storage function */
fsg_common = fsg_common_from_params(0, cdev, &mod_data);
if (IS_ERR(fsg_common)) {
status = PTR_ERR(fsg_common);
goto fail1;
{
void *retp;
retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
if (IS_ERR(retp)) {
status = PTR_ERR(retp);
goto fail1;
}
}
/* set bcdDevice */
gcnum = usb_gadget_controller_number(gadget);
if (gcnum >= 0)
if (gcnum >= 0) {
device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
else {
/* We assume that can_support_ecm() tells the truth;
* but if the controller isn't recognized at all then
* that assumption is a bit more likely to be wrong.
*/
WARNING(cdev, "controller '%s' not recognized\n",
gadget->name);
} else {
WARNING(cdev, "controller '%s' not recognized\n", gadget->name);
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 */
/* allocate string descriptor numbers */
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 fail2;
strings_dev[STRING_MANUFACTURER_IDX].id = status;
device_desc.iManufacturer = status;
status = usb_string_id(cdev);
if (status < 0)
status = usb_string_ids_tab(cdev, strings_dev);
if (unlikely(status < 0))
goto fail2;
strings_dev[STRING_PRODUCT_IDX].id = status;
device_desc.iProduct = status;
#ifdef USB_ETH_RNDIS
/* register our first configuration */
status = usb_add_config(cdev, &rndis_config_driver);
if (status < 0)
device_desc.iManufacturer =
strings_dev[MULTI_STRING_MANUFACTURER_IDX].id;
device_desc.iProduct =
strings_dev[MULTI_STRING_PRODUCT_IDX].id;
/* register configurations */
status = rndis_config_register(cdev);
if (unlikely(status < 0))
goto fail2;
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
/* register our second configuration */
status = usb_add_config(cdev, &cdc_config_driver);
if (status < 0)
status = cdc_config_register(cdev);
if (unlikely(status < 0))
goto fail2;
#endif
dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
fsg_common_put(fsg_common);
/* we're done */
dev_info(&gadget->dev, DRIVER_DESC "\n");
fsg_common_put(&fsg_common);
return 0;
/* error recovery */
fail2:
fsg_common_put(fsg_common);
fsg_common_put(&fsg_common);
fail1:
gserial_cleanup();
fail0:
@ -339,18 +372,15 @@ static struct usb_composite_driver multi_driver = {
.unbind = __exit_p(multi_unbind),
};
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Michal Nazarewicz");
MODULE_LICENSE("GPL");
static int __init g_multi_init(void)
static int __init multi_init(void)
{
return usb_composite_register(&multi_driver);
}
module_init(g_multi_init);
module_init(multi_init);
static void __exit g_multi_cleanup(void)
static void __exit multi_exit(void)
{
usb_composite_unregister(&multi_driver);
}
module_exit(g_multi_cleanup);
module_exit(multi_exit);