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linux_dsm_epyc7002/drivers/usb/gadget/legacy/multi.c
Andrzej Pietrasiewicz 8443f2d2b7 usb: gadget: Gadget directory cleanup - group legacy gadgets 
The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the legacy gadgets (i.e. those not using configfs)
into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-07-16 12:14:05 -05:00

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/*
* 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 <linux/netdevice.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");
#include "f_mass_storage.h"
#include "u_ecm.h"
#ifdef USB_ETH_RNDIS
# include "u_rndis.h"
# 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_GADGET_DEBUG_FILES */
FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
static struct usb_function_instance *fi_acm;
static struct usb_function_instance *fi_msg;
/********** RNDIS **********/
#ifdef USB_ETH_RNDIS
static struct usb_function_instance *fi_rndis;
static struct usb_function *f_acm_rndis;
static struct usb_function *f_rndis;
static struct usb_function *f_msg_rndis;
static __init int rndis_do_config(struct usb_configuration *c)
{
struct fsg_opts *fsg_opts;
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
f_rndis = usb_get_function(fi_rndis);
if (IS_ERR(f_rndis))
return PTR_ERR(f_rndis);
ret = usb_add_function(c, f_rndis);
if (ret < 0)
goto err_func_rndis;
f_acm_rndis = usb_get_function(fi_acm);
if (IS_ERR(f_acm_rndis)) {
ret = PTR_ERR(f_acm_rndis);
goto err_func_acm;
}
ret = usb_add_function(c, f_acm_rndis);
if (ret)
goto err_conf;
f_msg_rndis = usb_get_function(fi_msg);
if (IS_ERR(f_msg_rndis)) {
ret = PTR_ERR(f_msg_rndis);
goto err_fsg;
}
fsg_opts = fsg_opts_from_func_inst(fi_msg);
ret = fsg_common_run_thread(fsg_opts->common);
if (ret)
goto err_run;
ret = usb_add_function(c, f_msg_rndis);
if (ret)
goto err_run;
return 0;
err_run:
usb_put_function(f_msg_rndis);
err_fsg:
usb_remove_function(c, f_acm_rndis);
err_conf:
usb_put_function(f_acm_rndis);
err_func_acm:
usb_remove_function(c, f_rndis);
err_func_rndis:
usb_put_function(f_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_instance *fi_ecm;
static struct usb_function *f_acm_multi;
static struct usb_function *f_ecm;
static struct usb_function *f_msg_multi;
static __init int cdc_do_config(struct usb_configuration *c)
{
struct fsg_opts *fsg_opts;
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
f_ecm = usb_get_function(fi_ecm);
if (IS_ERR(f_ecm))
return PTR_ERR(f_ecm);
ret = usb_add_function(c, f_ecm);
if (ret < 0)
goto err_func_ecm;
/* implicit port_num is zero */
f_acm_multi = usb_get_function(fi_acm);
if (IS_ERR(f_acm_multi)) {
ret = PTR_ERR(f_acm_multi);
goto err_func_acm;
}
ret = usb_add_function(c, f_acm_multi);
if (ret)
goto err_conf;
f_msg_multi = usb_get_function(fi_msg);
if (IS_ERR(f_msg_multi)) {
ret = PTR_ERR(f_msg_multi);
goto err_fsg;
}
fsg_opts = fsg_opts_from_func_inst(fi_msg);
ret = fsg_common_run_thread(fsg_opts->common);
if (ret)
goto err_run;
ret = usb_add_function(c, f_msg_multi);
if (ret)
goto err_run;
return 0;
err_run:
usb_put_function(f_msg_multi);
err_fsg:
usb_remove_function(c, f_acm_multi);
err_conf:
usb_put_function(f_acm_multi);
err_func_acm:
usb_remove_function(c, f_ecm);
err_func_ecm:
usb_put_function(f_ecm);
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;
#ifdef CONFIG_USB_G_MULTI_CDC
struct f_ecm_opts *ecm_opts;
#endif
#ifdef USB_ETH_RNDIS
struct f_rndis_opts *rndis_opts;
#endif
struct fsg_opts *fsg_opts;
struct fsg_config config;
int status;
if (!can_support_ecm(cdev->gadget)) {
dev_err(&gadget->dev, "controller '%s' not usable\n",
gadget->name);
return -EINVAL;
}
#ifdef CONFIG_USB_G_MULTI_CDC
fi_ecm = usb_get_function_instance("ecm");
if (IS_ERR(fi_ecm))
return PTR_ERR(fi_ecm);
ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
gether_set_qmult(ecm_opts->net, qmult);
if (!gether_set_host_addr(ecm_opts->net, host_addr))
pr_info("using host ethernet address: %s", host_addr);
if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
pr_info("using self ethernet address: %s", dev_addr);
#endif
#ifdef USB_ETH_RNDIS
fi_rndis = usb_get_function_instance("rndis");
if (IS_ERR(fi_rndis)) {
status = PTR_ERR(fi_rndis);
goto fail;
}
rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
gether_set_qmult(rndis_opts->net, qmult);
if (!gether_set_host_addr(rndis_opts->net, host_addr))
pr_info("using host ethernet address: %s", host_addr);
if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
pr_info("using self ethernet address: %s", dev_addr);
#endif
#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
/*
* If both ecm and rndis are selected then:
* 1) rndis borrows the net interface from ecm
* 2) since the interface is shared it must not be bound
* twice - in ecm's _and_ rndis' binds, so do it here.
*/
gether_set_gadget(ecm_opts->net, cdev->gadget);
status = gether_register_netdev(ecm_opts->net);
if (status)
goto fail0;
rndis_borrow_net(fi_rndis, ecm_opts->net);
ecm_opts->bound = true;
#endif
/* 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 */
fi_msg = usb_get_function_instance("mass_storage");
if (IS_ERR(fi_msg)) {
status = PTR_ERR(fi_msg);
goto fail1;
}
fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
fsg_opts = fsg_opts_from_func_inst(fi_msg);
fsg_opts->no_configfs = true;
status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
if (status)
goto fail2;
status = fsg_common_set_nluns(fsg_opts->common, config.nluns);
if (status)
goto fail_set_nluns;
status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
if (status)
goto fail_set_cdev;
fsg_common_set_sysfs(fsg_opts->common, true);
status = fsg_common_create_luns(fsg_opts->common, &config);
if (status)
goto fail_set_cdev;
fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
config.product_name);
/* allocate string IDs */
status = usb_string_ids_tab(cdev, strings_dev);
if (unlikely(status < 0))
goto fail_string_ids;
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
/* register configurations */
status = rndis_config_register(cdev);
if (unlikely(status < 0))
goto fail_string_ids;
status = cdc_config_register(cdev);
if (unlikely(status < 0))
goto fail_string_ids;
usb_composite_overwrite_options(cdev, &coverwrite);
/* we're done */
dev_info(&gadget->dev, DRIVER_DESC "\n");
return 0;
/* error recovery */
fail_string_ids:
fsg_common_remove_luns(fsg_opts->common);
fail_set_cdev:
fsg_common_free_luns(fsg_opts->common);
fail_set_nluns:
fsg_common_free_buffers(fsg_opts->common);
fail2:
usb_put_function_instance(fi_msg);
fail1:
usb_put_function_instance(fi_acm);
fail0:
#ifdef USB_ETH_RNDIS
usb_put_function_instance(fi_rndis);
fail:
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
usb_put_function_instance(fi_ecm);
#endif
return status;
}
static int __exit multi_unbind(struct usb_composite_dev *cdev)
{
#ifdef CONFIG_USB_G_MULTI_CDC
usb_put_function(f_msg_multi);
#endif
#ifdef USB_ETH_RNDIS
usb_put_function(f_msg_rndis);
#endif
usb_put_function_instance(fi_msg);
#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);
#ifdef USB_ETH_RNDIS
usb_put_function(f_rndis);
usb_put_function_instance(fi_rndis);
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
usb_put_function(f_ecm);
usb_put_function_instance(fi_ecm);
#endif
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,
};
module_usb_composite_driver(multi_driver);
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