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gadget.c
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#include <linux/device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/kthread.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/version.h>
#include "debug.h"
#include "util.h"
#include "msg.h"
#include "com.h"
#include "com_udp.h"
#include "gadget.h"
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
#include "epautoconf.c"
#endif
#ifndef CONFIG_GADGET_DEBUG_LEVEL
#define CONFIG_GADGET_DEBUG_LEVEL DBG
#endif
#ifdef CONFIG_GADGET_TRACE
#define trace _trace("GADGET")
#else
#define trace {}
#endif
#define CONFIG_GADGET_DEBUG
#ifdef CONFIG_GADGET_DEBUG
#define log(lvl,fmt, ...) _log("GADGET",CONFIG_GADGET_DEBUG_LEVEL,lvl,fmt, ##__VA_ARGS__)
#define log_msg(lvl,buf,fmt, ...) _log_msg("GADGET",CONFIG_GADGET_DEBUG_LEVEL,lvl,buf,fmt, ##__VA_ARGS__)
#else
#define log(lvl,fmt, ...) {}
#define log_msg(lvl,buf,fmt, ...) {}
#endif
#define CONFIG_GADGET_ASSERT
#ifdef CONFIG_GADGET_ASSERT
#define assert(func) _assert("GADGET",func)
#else
#define assert(func) {}
#endif
#include "common.h"
/*-------------------------------------------------------------------------*/
int
endpoint_queue(gadget_request_t *req)
{
int err;
epid_t *epid = &req->ep->epid;
struct usb_request *r = req->req;
log_msg(DBG,req->msg,"USB SEND ++ [%s] req:%s ep:%s %p",dump_endpoint_id(epid),dump_usb_request(r),dump_usb_ep(req->ep->usb_ep));
err = usb_ep_queue(req->ep->usb_ep, r, GFP_ATOMIC);
if (err < 0) {
log(ERR, "Unable to queue request err:[%d] req:[%s] ep:[%s]",err,dump_usb_request(r),dump_endpoint_id(epid));
return err;
}
log(DBG,"usb_ep_queue succeed");
return 0;
}
/*-------------------------------------------------------------------------
*
* Gadget endpoint management
*
-------------------------------------------------------------------------*/
gadget_endpoint_t*
add_gadget_ep0_endpoint(epdir_t epdir)
{
int err;
gadget_endpoint_t *ep;
ep = kmalloc(sizeof *ep, GFP_KERNEL);
if (!ep) {
goto fail1;
}
err = create_ep0_endpoint((ep_t *)ep, epdir, &gadget_cb_conf);
if (err < 0) {
goto fail2;
}
ep->usb_ep = gadget_state.gadget->ep0;
ep->usb_ep->driver_data = ep;
list_add(&ep->list,&gadget_state.eplist);
log(INFO,"Add gadget endpoint epid:[%s] ep:[%s]",dump_endpoint_id(&ep->epid),ep->epid,dump_usb_ep(ep->usb_ep));
return ep;
fail2:
kfree(ep);
fail1:
log(ERR,"Unable to allocate memory");
return NULL;
}
int
ep_match_name(const char *name, const char *gname)
{
if (!strcmp(name,gname)) {
return 1;
} else {
if (!strncmp(name,gname,strlen(gname))) {
return 1;
}
}
return 0;
}
/* Similar to what is done with usb_ep_autoconfig, but do not change address */
static struct usb_ep *
usb_ep_config(struct usb_endpoint_descriptor *desc)
{
struct usb_ep *ep = NULL;
char myname[16];
snprintf(myname, 16, "ep%d%s",
desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK,
((desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_IN) ? "in": "out");
log(DBG, "autoconf: Looking for endpoint %s\n", myname);
list_for_each_entry (ep, &gadget_state.gadget->ep_list, ep_list) {
if (ep_match_name(myname,ep->name)) {
log(DBG,"Find valid ep:[%s]",dump_usb_ep(ep));
if (ep->maxpacket_limit < (0x7ff & usb_endpoint_maxp(desc))) {
desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit);
}
return ep;
} else {
log(SPEC,"not good %s %s",myname,ep->name);
}
}
log(ERR,"Unable to find endpoint %s epdesc:[%s]",myname,dump_usb_endpoint_descriptor(desc));
return NULL;
}
gadget_endpoint_t*
add_gadget_endpoint(struct usb_endpoint_descriptor *epdesc)
{
int err;
gadget_endpoint_t *ep;
struct usb_ep *usb_ep;
usb_ep = usb_ep_config(epdesc);
if(!usb_ep) {
log(ERR,"Unable to autoconfig endpoint desc:[%s]",dump_usb_endpoint_descriptor(epdesc));
return NULL;
}
ep = kmalloc(sizeof *ep, GFP_KERNEL);
if (!ep) {
goto fail1;
}
err = create_endpoint((ep_t *)ep, epdesc, &gadget_cb_conf);
if (err < 0) {
goto fail2;
}
ep->usb_ep = usb_ep;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
usb_ep->desc = ep->desc;
#endif
usb_ep->driver_data = gadget_state.gadget;
list_add(&ep->list,&gadget_state.eplist);
err = usb_ep_disable(usb_ep);
if (err<0) {
log(WRN,"Unable to disable [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
}
usb_ep->desc = ep->desc;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,1,0)
err = usb_ep_enable(usb_ep,ep->desc);
#else
err = usb_ep_enable(usb_ep);
#endif
if (err < 0) {
log(ERR,"Unable to enable endpoint err:%d [desc:%s] maxpacket:%hu maxpacket_limit:%hu addr:%02x",err,dump_usb_endpoint_descriptor(usb_ep->desc),usb_ep->maxpacket,usb_ep->maxpacket_limit,usb_ep->address);
goto fail3;
}
log(INFO,"Add gadget endpoint epid:[%s] ep:[%s]",dump_endpoint_id(&ep->epid),dump_usb_ep(ep->usb_ep));
return ep;
fail3:
list_del_init(&ep->list);
free_endpoint((ep_t *)ep);
fail2:
kfree(ep);
fail1:
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)
usb_ep_autoconfig_release(usb_ep);
#endif
return NULL;
}
void
dump_active_gadget_endpoints(void)
{
ep_t *ep;
int i = 0;
log(SPEC,"Active gadget endpoints");
list_for_each_entry(ep,&gadget_state.eplist,list) {
log(SPEC,"%u : %s",i,dump_usb_endpoint_descriptor(ep->desc));
i++;
}
}
void
free_gadget_endpoint(gadget_endpoint_t *ep)
{
gadget_request_t *req, *tmp;
int err;
log(DBG,"Free gadget endpoint [%s]",dump_endpoint_id(&ep->epid));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)
usb_ep_autoconfig_release(ep->usb_ep);
#endif
// Remove from list
list_del_init(&ep->list);
// Safe has to be used, because usb_ep_dequeue will call completion handler
// That will delete request from list
list_for_each_entry_safe(req,tmp,&ep->reqlist,list) {
// Using dequeue will raise completion routine with a status to -ECONNRESET
// Then request will be freed in completion routine
err = usb_ep_dequeue(ep->usb_ep,req->req);
if (err<0) {
log(WRN,"Unable to dequeue request [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
}
}
usb_ep_fifo_flush(ep->usb_ep);
err = usb_ep_disable(ep->usb_ep);
if (err<0) {
log(WRN,"Unable to disable [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
}
free_endpoint((ep_t *)ep);
kfree(ep);
}
gadget_endpoint_t*
find_gadget_endpoint(const epid_t *id)
{
return (gadget_endpoint_t *)find_endpoint(id, &gadget_state.eplist);
}
int
disable_active_interface(void)
{
int i;
log(DBG,"Disable active interfaces");
for (i=0; i<gadget_state.identity.nb_int; i++) {
interface_desc_t *iface = &gadget_state.identity.interfaces[i];
if (iface->active) {
int err;
err = disable_interface(iface);
if (err<0) {
log(ERR,"Unable to disable interface [%d]",err);
return err;
}
}
}
return 0;
}
/*
Activate all num 0 interfaces, with all their endpoints
*/
int
enable_default_interface(void)
{
int i;
log(DBG,"Enable default interfaces");
// Enable all interface with altsetting 0
for (i=0; i<gadget_state.identity.nb_int; i++) {
interface_desc_t *iface = &gadget_state.identity.interfaces[i];
if (iface->desc.bAlternateSetting == 0) {
int err;
err = enable_interface(iface);
if (err<0) {
log(ERR,"Unable to enable interface [%d]",err);
return err;
}
}
}
return 0;
}
int
disable_interface(interface_desc_t *interface)
{
int ep;
interface->active = 0;
for (ep=0; ep<interface->desc.bNumEndpoints; ep++) {
struct usb_endpoint_descriptor *desc = &interface->endpoints[ep];
epid_t epid = {desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK,
EP_TYPE_FROM_KERNEL(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK),
EP_DIR_FROM_KERNEL(desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)};
gadget_endpoint_t *ep;
ep = find_gadget_endpoint(&epid);
if (ep) {
log(DBG,"Disabling endpoint %s",dump_endpoint_id(&epid));
free_gadget_endpoint(ep);
}
}
return 0;
}
int
enable_interface(interface_desc_t *interface)
{
int ep;
int err;
log(DBG,"Enable interface %u %u",interface->desc.bInterfaceNumber,interface->desc.bAlternateSetting);
interface->active = 1;
for (ep=0; ep<interface->desc.bNumEndpoints; ep++) {
struct usb_endpoint_descriptor *epdesc = &interface->endpoints[ep];
gadget_endpoint_t *epnew;
epnew = add_gadget_endpoint(epdesc);
if(!epnew) {
log(ERR,"Unable to add endpoint %u type:%s dir:%s",
epdesc->bEndpointAddress,
EP_TYPE_STR(EP_TYPE_FROM_KERNEL(epdesc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)),
EP_DIR_STR(EP_DIR_FROM_KERNEL(epdesc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)));
return -ENOMEM;
}
// Wait for host communication if OUT
if (IS_OUT(epnew) && !IS_CTRL(epnew)) {
err = epnew->ops->send_usb(epnew, NULL);
if (err<0) {
log(ERR,"Unable to ask for OUT [%d] epid:[%s]",err,dump_endpoint_id(&epnew->epid));
free_gadget_endpoint(epnew);
return err;
}
}
}
return 0;
}
int
set_interface(ushort ifnumber, ushort alternative)
{
int i;
int ret;
interface_desc_t *active = NULL;
log(DBG,"Set interface %u %u", ifnumber, alternative);
for (i=0; i<gadget_state.identity.nb_int; i++) {
interface_desc_t *interface = &gadget_state.identity.interfaces[i];
if (interface->desc.bInterfaceNumber == ifnumber) {
if (interface->desc.bAlternateSetting == alternative) {
active = interface;
} else {
ret = disable_interface(interface);
if (ret != 0) {
log(WRN,"Unable to disable interface [%d] (%u,%u)",ret,interface->desc.bInterfaceNumber,interface->desc.bAlternateSetting);
return ret;
}
}
}
}
if (active) {
ret = enable_interface(active);
if (ret != 0) {
log(ERR,"Problem during enable interface [%d] (%u,%u)",ret,ifnumber,alternative);
return ret;
} else {
return 0;
}
}
log(ERR,"Unable to set interface (%hu,%hu) : not found",ifnumber, alternative);
return -EINVAL;
}
/*-------------------------------------------------------------------------
*
* Gadget request allocation management
*
-------------------------------------------------------------------------*/
gadget_request_t*
alloc_gadget_request(gadget_endpoint_t *ep, const size_t sz, int type)
{
gadget_request_t *req;
req = kmalloc(sizeof *req, GFP_KERNEL);
if (!req) {
goto fail1;
}
req->req = usb_ep_alloc_request(ep->usb_ep, GFP_KERNEL);
if (!req->req) {
goto fail2;
}
req->msg = alloc_msg(sz,type);
if (!req->msg) {
goto fail3;
}
list_add(&req->list,&ep->reqlist);
msg_set_epid(req->msg, &ep->epid);
req->req->buf = msg_get_data(req->msg);
req->ep = ep;
return req;
fail3:
usb_ep_free_request(ep->usb_ep, req->req);
fail2:
kfree(req);
fail1:
log(ERR,"Unable to allocate memory");
return NULL;
}
static void
free_gadget_request(gadget_request_t *req)
{
log(DBG,"Free gadget request epid:[%s]",dump_endpoint_id(&req->ep->epid));
list_del(&req->list);
free_msg(req->msg);
usb_ep_free_request(req->ep->usb_ep,req->req);
kfree(req);
}
/* -------------------------------------------------------------------------
*
* Generic Callback
*
* -------------------------------------------------------------------------*/
/*
Function executed by workqueue
*/
static void
recv(struct work_struct *data)
{
gadget_request_t *dreq = (gadget_request_t *)data;
gadget_endpoint_t *ep = dreq->ep;
int err;
err = ep->ops->recv_usb(ep, dreq);
if (err<0) {
log(ERR,"Unable to recv usb [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
}
ep->ops->free_request(ep, dreq);
}
static void
gadget_recv_usb(struct usb_ep *endpoint, struct usb_request *req)
{
int err;
gadget_request_t *dreq = (gadget_request_t *)req->context;
gadget_endpoint_t *ep = dreq->ep;
// Cannot be done in Work Queue, because this function will be finished
// before usb_ep_dequeue returns, but not necessarily the workqueue function
// So a race can occcur, and ep could be freed
if(req->status < 0) {
log(ERR,"USB problem during reception [%d] epid:[%s]",req->status,dump_endpoint_id(&ep->epid));
ep->ops->free_request(ep,dreq);
return;
}
INIT_WORK(&dreq->work, &recv);
err = queue_work(dreq->ep->wq, &dreq->work);
if(err < 0) {
log(WRN,"Unable to queue work");
}
}
int
gadget_recv_userland_usb(msg_t *msg)
{
int err;
log_msg(DBG,msg,"UDP -- RECV");
if(!gadget_state.registered) {
} else {
gadget_endpoint_t *ep;
ep = find_gadget_endpoint(&msg->epid);
if (!ep) {
log(ERR,"Unable to find endpoint epid:[%s]",dump_endpoint_id(&msg->epid));
return -EINVAL;
}
err = ep->ops->recv_userland(ep, msg);
if (err<0) {
log(ERR,"Unable to recv userland [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
}
return 0;
}
int
check_descriptor_header(char *buffer, int size)
{
struct usb_descriptor_header *header = (struct usb_descriptor_header *)buffer;
log(DBG,"HEADER: %02x",header->bDescriptorType);
if (size < sizeof *header) {
log(WRN,"Not enough bytes for reading descriptor, skipping");
return 0;
}
header = (struct usb_descriptor_header *)buffer;
if ((header->bLength > size) || (header->bLength < 2)) {
log(WRN,"Descriptor size pb %u (remaining %u)",header->bLength,size);
return 0;
}
return 1;
}
/*
* Parse firt packet containing identity device
* Counter part of build_init_pkt
*/
int
parse_init_pkt(identity_t *identity, msg_t *msg)
{
int nintf, nintf_orig;
int cfgno = 0;
int cfgidx = 0;
int i_interface = 0;
int ret = 0;
struct usb_device_descriptor *ddesc;
struct usb_config_descriptor *cdesc;
char *buffer;
size_t size;
buffer = msg_get_data(msg);
size = msg_get_data_size(msg);
// Speed Parsing
if (size < sizeof(enum usb_device_speed)) {
log(WRN,"Buffer to small for parsing speed");
ret = -EINVAL;
goto end;
}
memcpy(&identity->speed, buffer, sizeof(enum usb_device_speed));
buffer += sizeof(enum usb_device_speed);
size -= sizeof(enum usb_device_speed);
// DeviceDescriptor Parsing
if (size < USB_DT_DEVICE_SIZE) {
log(WRN,"Buffer to small for parsing device");
ret = -EINVAL;
goto end;
}
memcpy(&identity->device, buffer, USB_DT_DEVICE_SIZE);
ddesc = &identity->device;
if (ddesc->bDescriptorType != USB_DT_DEVICE ||
ddesc->bLength < USB_DT_DEVICE_SIZE ||
ddesc->bLength > size) {
log(WRN,"invalid descriptor for device"
"type = 0x%X, length = %d\n", cfgidx,
ddesc->bDescriptorType, identity->conf.bLength);
ret = -EINVAL;
goto end;
}
buffer += ddesc->bLength;
size -= ddesc->bLength;
// ConfigurationDescriptor Parsing
if (size < USB_DT_CONFIG_SIZE) {
log(WRN,"Buffer to small for parsing configuration");
ret = -EINVAL;
goto end;
}
memcpy(&identity->conf, buffer, USB_DT_CONFIG_SIZE);
cdesc = &identity->conf;
if (cdesc->bDescriptorType != USB_DT_CONFIG ||
cdesc->bLength < USB_DT_CONFIG_SIZE ||
cdesc->bLength > size) {
log(WRN,"invalid descriptor for config index %d: "
"type = 0x%X, length = %d\n", cfgidx,
cdesc->bDescriptorType, cdesc->bLength);
ret = -EINVAL;
goto end;
}
buffer += identity->conf.bLength;
size -= identity->conf.bLength;
// InterfaceDescriptor Parsing
nintf = nintf_orig = cdesc->bNumInterfaces;
if (nintf > MAX_INTERFACE_CONFIGURATION) {
log(WRN, "config %d has too many interfaces: %d, "
"using maximum allowed: %d\n",
cfgno, nintf, MAX_INTERFACE_CONFIGURATION);
nintf = MAX_INTERFACE_CONFIGURATION;
}
log(DBG,"*** NB INTERFACES:%u",nintf);
while (size > 0) {
struct usb_descriptor_header *header;
if (!check_descriptor_header(buffer,size)) {
goto end;
}
header = (struct usb_descriptor_header *)buffer;
size -= header->bLength;
buffer += header->bLength;
if (header->bDescriptorType == USB_DT_INTERFACE) {
struct usb_interface_descriptor *d;
int nb_ep;
int j_desc;
int i_ep = 0;
d = (struct usb_interface_descriptor *) header;
if (d->bLength < USB_DT_INTERFACE_SIZE) {
log(WRN,"config %d has an invalid "
"interface descriptor of length %d, "
"skipping\n", cfgno, d->bLength);
continue;
}
nb_ep = d->bNumEndpoints;
log(DBG,"*** NEW INTERFACE with %u endpoints",nb_ep);
for (j_desc=0; i_ep<nb_ep; j_desc++) {
if (!check_descriptor_header(buffer,size)) {
goto end;
}
header = (struct usb_descriptor_header *)buffer;
size -= header->bLength;
buffer += header->bLength;
log(DBG,"*** NEW descriptor %02X",header->bDescriptorType);
if (header->bDescriptorType == USB_DT_ENDPOINT) {
struct usb_endpoint_descriptor *e;
e = (struct usb_endpoint_descriptor *) header;
if (d->bLength < USB_DT_ENDPOINT_SIZE) {
log(WRN,"config %d has an invalid "
"endpoint descriptor of length %d, "
"skipping\n", cfgno, e->bLength);
continue;
}
memcpy(&identity->interfaces[i_interface].endpoints[i_ep],e,sizeof *e);
log(DBG,"New EP:%s",dump_usb_endpoint_descriptor(e));
i_ep++;
}
}
memcpy(&identity->interfaces[i_interface].desc,d,sizeof *d);
identity->interfaces[i_interface].active = 0;
i_interface++;
}
}
end:
identity->nb_int = i_interface;
return ret;
}
struct usb_gadget_driver ubq_gadget = {
.function = "ubq_gadget",
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
.speed = USB_SPEED_HIGH,
#else
.max_speed = USB_SPEED_HIGH,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)
.bind = ubq_bind,
#endif
.unbind = ubq_unbind,
.setup = ubq_setup,
.disconnect = ubq_disconnect,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,18,0)
.reset = ubq_disconnect,
#endif
.driver = {
.owner = THIS_MODULE,
.name = "ubq_gadget"
},
};
/*
* Called when a new device packet is received
*/
int
callback_new_device(msg_t *msg)
{
int ret;
identity_t *ident = &gadget_state.identity;
log_msg(INFO,msg,"New device detected");
if (gadget_state.registered) {
log(WRN,"Device was already registered, force deregister");
ubq_unregister();
clean_endpoints();
}
ret = parse_init_pkt(ident,msg);
if (ret<0) {
log(WRN,"Unable to parser init pkt [%d]",ret);
return ret;
}
ret = ubq_register();
if (ret<0) {
log(ERR,"Unable to register driver [%d]",ret);
return ret;
}
gadget_state.registered = 1;
return 0;
}
/*
* Called when a reset is received
*/
int
callback_reset(msg_t *msg)
{
log(INFO,"DEVICE DISCONNECT !!");
gadget_state.registered = 0;
ubq_unregister();
clean_endpoints();
return 0;
}
int
gadget_recv_userland_management(msg_t *msg)
{
int err;
if (IS_RESET_MNG_MSG(msg)) {
err = callback_reset(msg);
if (err<0) {
log(ERR,"Unable to reset [%d]",err);
return err;
}
} else if (IS_NEW_DEVICE_MNG_MSG(msg)) {
err = callback_new_device(msg);
if (err<0) {
log(ERR,"Unable to callback new device [%d]",err);
return err;
}
} else {
log(WRN,"Unknown userland mangement message received : %u %s",msg->management_type,dump_msg(msg));
return -EINVAL;
}
return 0;
}
int
gadget_recv_userland(msg_t *msg)
{
int err;
if (IS_USB_MSG(msg)) {
err = gadget_recv_userland_usb(msg);
if (err<0) {
log(ERR,"Unable to recv userland usb [%d]",err);
return err;
}
} else if (IS_MANAGEMENT_MSG(msg)) {
err = gadget_recv_userland_management(msg);
if (err<0) {
log(ERR,"Unable to recv userland management [%d]",err);
return err;
}
} else {
log(WRN,"Unknown userland message received");
return -EINVAL;
}
return 0;
}
/*-------------------------------------------------------------------------
*
* Endpoint Gadget Callback implementations
*
-------------------------------------------------------------------------*/
int
ep_gadget_send_usb(gadget_endpoint_t *ep, msg_t *msg)
{
int err;
gadget_request_t *req;
req = ep->ops->fill_request(ep, msg);
if (!req) {
log(ERR,"Unable to fill request");
return -EINVAL;
}
err = endpoint_queue(req);
if (err < 0) {
log(ERR,"Unable to endpoint queue [%d]",err);
ep->ops->free_request(ep, req);
return err;
}
return 0;
}
int
ep_gadget_recv_usb_ctrl(gadget_endpoint_t *ep, gadget_request_t *req)
{
int err;
if (IS_IN(ep)) { // It must be a IN ACK because IN request are handle in setup
if (req->req->status != 0) {
log(ERR,"Unable to sent request [%d] %s on ep %s",req->req->status,dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
return req->req->status;
}
log_msg(DBG,req->msg,"USB ++ SENT %s %s", dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
} else { // OUT
struct usb_ctrlrequest *ctrl = (struct usb_ctrlrequest *)msg_get_data(req->msg);
msg_set_data_size(req->msg,req->req->actual + sizeof(struct usb_ctrlrequest));
if (le16_to_cpu(ctrl->wLength) > 0) { // Data remaining from CTRL OUT
log_msg(DBG,req->msg,"USB ++ RECV %s %s", dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
err = ep->ops->send_userland(ep, req->msg);
if (err < 0) {
log(ERR,"Unable to send on userland [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
} else { // ACK of CTRL OUT
log_msg(DBG,req->msg,"USB ++ SENT ACK %s %s", dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
}
}
return 0;
}
int
ep_gadget_recv_usb(gadget_endpoint_t *ep, gadget_request_t *req)
{
int err;
log(DBG,"RECV USB [%s] sz:%u status:%d",dump_endpoint_id(&ep->epid),req->req->actual,req->req->status);
msg_set_data_size(req->msg,req->req->actual);
if (IS_OUT(ep)) {
log_msg(DBG,req->msg,"USB ++ RECV %s %s", dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
err = ep->ops->send_userland(ep, req->msg);
if (err < 0) {
log(ERR,"Unable to send on userland [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
log(DBG,"Resubmitting OUT endpoint [%s]",dump_endpoint_id(&ep->epid));
// TODO: Wait for ACK from userland before resubmit
err = ep->ops->send_usb(ep,NULL); // Need to receive other OUT message, so resubmit
if (err<0) {
log(ERR,"Unable to ask for OUT data [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
} else { // IN message consumed by host, send ACK to user land
msg_t *m = alloc_msg_ack(&ep->epid, req->req->status, NULL, 0);
if(!m) {
log(ERR,"Unable to allocate memory");
return -ENOMEM;
}
log_msg(DBG,req->msg,"USB ++ SENT %s %s", dump_usb_request(req->req), dump_endpoint_id(&ep->epid));
err = ep->ops->send_userland(ep,m);
free_msg(m);
if (err < 0) {
log(ERR,"Unable to send on userland [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
}
return 0;
}
int
ep_gadget_send_userland(gadget_endpoint_t *ep, msg_t *msg) {
int err;
log_msg(DBG,msg,"UDP -- SEND");
err = send_userland(gadget_state.com, msg);
if (err<0) {
log(ERR,"Unable to send on userland [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
return 0;
}
int
ep_gadget_recv_userland_ctrl(gadget_endpoint_t *ep, msg_t *msg)
{
int err;
struct usb_ctrlrequest *ctrl = (struct usb_ctrlrequest *)msg_get_data(msg);
if (IS_USB_ACK(msg)) {
log(WRN,"RECV ACK [%d] halting epid:[%s]",msg->status,dump_endpoint_id(&ep->epid));
if (msg->status == -EPIPE) {
usb_ep_set_halt(ep->usb_ep);
}
return 0;
}
log_msg(DBG,msg,"RECV CTRL from USERLAND epid:[%s] ctrl:[%s]",dump_endpoint_id(&ep->epid),dump_usb_ctrlrequest(ctrl));
if (IS_IN(ep)) {
// Need to find endpoint headers, to create them
// FIXME: 9 ?? Why 9 We need to get a complete response
// FIXME: Overlapp on ep->ctrl ???
if(IS_GET_DESC_CONFIGURATION(ctrl) && le16_to_cpu(ctrl->wLength) > 9) {
err = disable_active_interface();
if (err<0) {
log(ERR,"Unable to disable active interfaces [%d]",err);
return err;
}
err = enable_default_interface();
if (err<0) {
log(ERR,"Unable to enable default interfaces [%d]",err);
return err;
}
}
err = ep->ops->send_usb(ep, msg);
if(err < 0) {
log(ERR,"Unable to send usb [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
} else { // OUT
// ACK received from userland, for a CTRL OUT without data
log(DBG,"Received ACK for CTRL OUT without data");
err = ep->ops->send_usb(ep, msg);
if(err < 0) {
log(ERR,"Unable to send usb [%d] epid:[%s]",err,dump_endpoint_id(&ep->epid));
return err;
}
}
return 0;