Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-03 17:41:22 +00:00
Code Issues Packages Projects Releases Wiki Activity
13613c133b
linux/drivers/usb/gadget/multi.c
Andrzej Pietrasiewicz 6fdc5dd25e usb: gadget: create a utility module for mass_storage 
Converting to configfs requires making the f_mass_storage.c a module.

But first we need to get rid of "#include "storage_common.c".

This patch makes storage_common.c a separately compiled file, which is
built as a utility module named u_ms.ko. After all mass storage users are
converted to the new function interface this module can be eliminated
by merging it with the mass storage function's module.

USB descriptors are exported so that they can be accessed from
f_mass_storage.

FSG_VENDOR_ID and FSG_PRODUCT_ID are moved to their only user.

Handling of CONFIG_USB_GADGET_DEBUG_FILES is moved to f_mass_storage.c.
The fsg_num_buffers static is moved to FSG_MODULE_PARAMETER users, so
instead of using a global variable the f_mass_storage introduces
fsg_num_buffers member in fsg_common (and fsg_config).

fsg_strings and fsg_stringtab are moved to f_mass_storage.c.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-10-01 09:50:57 -05:00

390 lines
8.6 KiB
C
Raw Blame History

/*
* multi.c -- Multifunction Composite driver
*
* Copyright (C) 2008 David Brownell
* Copyright (C) 2008 Nokia Corporation
* Copyright (C) 2009 Samsung Electronics
* Author: Michal Nazarewicz (mina86@mina86.com)
*
* 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/module.h>
#include "u_serial.h"
#if defined USB_ETH_RNDIS
# undef USB_ETH_RNDIS
#endif
#ifdef CONFIG_USB_G_MULTI_RNDIS
# define USB_ETH_RNDIS y
#endif
#define DRIVER_DESC "Multifunction Composite Gadget"
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Michal Nazarewicz");
MODULE_LICENSE("GPL");
/***************************** All the files... *****************************/
/*
* 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 "f_mass_storage.c"
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
#ifdef USB_ETH_RNDIS
# define USB_FRNDIS_INCLUDED
# include "f_rndis.c"
# include "rndis.h"
#endif
#include "u_ether.h"
USB_GADGET_COMPOSITE_OPTIONS();
USB_ETHERNET_MODULE_PARAMETERS();
/***************************** Device Descriptor ****************************/
#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
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,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = cpu_to_le16(0x0200),
.bDeviceClass = USB_CLASS_MISC /* 0xEF */,
.bDeviceSubClass = 2,
.bDeviceProtocol = 1,
/* Vendor and product id can be overridden by module parameters. */
.idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
};
static const struct usb_descriptor_header *otg_desc[] = {
(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,
};
enum {
MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
MULTI_STRING_CDC_CONFIG_IDX,
};
static struct usb_string strings_dev[] = {
[USB_GADGET_MANUFACTURER_IDX].s = "",
[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
[USB_GADGET_SERIAL_IDX].s = "",
[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
{ } /* end of list */
};
static struct usb_gadget_strings *dev_strings[] = {
&(struct usb_gadget_strings){
.language = 0x0409, /* en-us */
.strings = strings_dev,
},
NULL,
};
/****************************** Configurations ******************************/
static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
#else
/*
* Number of buffers we will use.
* 2 is usually enough for good buffering pipeline
*/
#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
#endif /* CONFIG_USB_DEBUG */
FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
static struct fsg_common fsg_common;
static u8 host_mac[ETH_ALEN];
static struct usb_function_instance *fi_acm;
static struct eth_dev *the_dev;
/********** RNDIS **********/
#ifdef USB_ETH_RNDIS
static struct usb_function *f_acm_rndis;
static __init int rndis_do_config(struct usb_configuration *c)
{
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
ret = rndis_bind_config(c, host_mac, the_dev);
if (ret < 0)
return ret;
f_acm_rndis = usb_get_function(fi_acm);
if (IS_ERR(f_acm_rndis))
return PTR_ERR(f_acm_rndis);
ret = usb_add_function(c, f_acm_rndis);
if (ret)
goto err_conf;
ret = fsg_bind_config(c->cdev, c, &fsg_common);
if (ret < 0)
goto err_fsg;
return 0;
err_fsg:
usb_remove_function(c, f_acm_rndis);
err_conf:
usb_put_function(f_acm_rndis);
return ret;
}
static __ref int rndis_config_register(struct usb_composite_dev *cdev)
{
static struct usb_configuration 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, rndis_do_config);
}
#else
static __ref int rndis_config_register(struct usb_composite_dev *cdev)
{
return 0;
}
#endif
/********** CDC ECM **********/
#ifdef CONFIG_USB_G_MULTI_CDC
static struct usb_function *f_acm_multi;
static __init int cdc_do_config(struct usb_configuration *c)
{
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
ret = ecm_bind_config(c, host_mac, the_dev);
if (ret < 0)
return ret;
/* implicit port_num is zero */
f_acm_multi = usb_get_function(fi_acm);
if (IS_ERR(f_acm_multi))
return PTR_ERR(f_acm_multi);
ret = usb_add_function(c, f_acm_multi);
if (ret)
goto err_conf;
ret = fsg_bind_config(c->cdev, c, &fsg_common);
if (ret < 0)
goto err_fsg;
return 0;
err_fsg:
usb_remove_function(c, f_acm_multi);
err_conf:
usb_put_function(f_acm_multi);
return ret;
}
static __ref int cdc_config_register(struct usb_composite_dev *cdev)
{
static struct usb_configuration 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, cdc_do_config);
}
#else
static __ref int cdc_config_register(struct usb_composite_dev *cdev)
{
return 0;
}
#endif
/****************************** Gadget Bind ******************************/
static int __ref multi_bind(struct usb_composite_dev *cdev)
{
struct usb_gadget *gadget = cdev->gadget;
int status;
if (!can_support_ecm(cdev->gadget)) {
dev_err(&gadget->dev, "controller '%s' not usable\n",
gadget->name);
return -EINVAL;
}
/* set up network link layer */
the_dev = gether_setup(cdev->gadget, dev_addr, host_addr, host_mac,
qmult);
if (IS_ERR(the_dev))
return PTR_ERR(the_dev);
/* set up serial link layer */
fi_acm = usb_get_function_instance("acm");
if (IS_ERR(fi_acm)) {
status = PTR_ERR(fi_acm);
goto fail0;
}
/* set up mass storage function */
{
void *retp;
retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data,
fsg_num_buffers);
if (IS_ERR(retp)) {
status = PTR_ERR(retp);
goto fail1;
}
}
/* allocate string IDs */
status = usb_string_ids_tab(cdev, strings_dev);
if (unlikely(status < 0))
goto fail2;
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
/* register configurations */
status = rndis_config_register(cdev);
if (unlikely(status < 0))
goto fail2;
status = cdc_config_register(cdev);
if (unlikely(status < 0))
goto fail2;
usb_composite_overwrite_options(cdev, &coverwrite);
/* 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);
fail1:
usb_put_function_instance(fi_acm);
fail0:
gether_cleanup(the_dev);
return status;
}
static int __exit multi_unbind(struct usb_composite_dev *cdev)
{
#ifdef CONFIG_USB_G_MULTI_CDC
usb_put_function(f_acm_multi);
#endif
#ifdef USB_ETH_RNDIS
usb_put_function(f_acm_rndis);
#endif
usb_put_function_instance(fi_acm);
gether_cleanup(the_dev);
return 0;
}
/****************************** Some noise ******************************/
static __refdata struct usb_composite_driver multi_driver = {
.name = "g_multi",
.dev = &device_desc,
.strings = dev_strings,
.max_speed = USB_SPEED_HIGH,
.bind = multi_bind,
.unbind = __exit_p(multi_unbind),
.needs_serial = 1,
};
static int __init multi_init(void)
{
return usb_composite_probe(&multi_driver);
}
module_init(multi_init);
static void __exit multi_exit(void)
{
usb_composite_unregister(&multi_driver);
}
module_exit(multi_exit);
Reference in New Issue View Git Blame Copy Permalink