struct usb_request *req;
};
+struct ffs_desc_helper {
+ struct ffs_data *ffs;
+ unsigned interfaces_count;
+ unsigned eps_count;
+};
+
static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
-static struct inode *__must_check
+static struct dentry *
ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p);
+ const struct file_operations *fops);
/* Devices management *******************************************************/
case FUNCTIONFS_ENDPOINT_REVMAP:
ret = epfile->ep->num;
break;
+ case FUNCTIONFS_ENDPOINT_DESC:
+ {
+ int desc_idx;
+ struct usb_endpoint_descriptor *desc;
+
+ switch (epfile->ffs->gadget->speed) {
+ case USB_SPEED_SUPER:
+ desc_idx = 2;
+ break;
+ case USB_SPEED_HIGH:
+ desc_idx = 1;
+ break;
+ default:
+ desc_idx = 0;
+ }
+ desc = epfile->ep->descs[desc_idx];
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ ret = copy_to_user((void *)value, desc, sizeof(*desc));
+ if (ret)
+ ret = -EFAULT;
+ return ret;
+ }
default:
ret = -ENOTTY;
}
}
/* Create "regular" file */
-static struct inode *ffs_sb_create_file(struct super_block *sb,
+static struct dentry *ffs_sb_create_file(struct super_block *sb,
const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p)
+ const struct file_operations *fops)
{
struct ffs_data *ffs = sb->s_fs_info;
struct dentry *dentry;
}
d_add(dentry, inode);
- if (dentry_p)
- *dentry_p = dentry;
-
- return inode;
+ return dentry;
}
/* Super block */
/* EP0 file */
if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs,
- &ffs_ep0_operations, NULL)))
+ &ffs_ep0_operations)))
return -ENOMEM;
return 0;
epfile->ffs = ffs;
mutex_init(&epfile->mutex);
init_waitqueue_head(&epfile->wait);
- sprintf(epfiles->name, "ep%u", i);
- if (!unlikely(ffs_sb_create_file(ffs->sb, epfiles->name, epfile,
- &ffs_epfile_operations,
- &epfile->dentry))) {
+ if (ffs->user_flags & FUNCTIONFS_VIRTUAL_ADDR)
+ sprintf(epfiles->name, "ep%02x", ffs->eps_addrmap[i]);
+ else
+ sprintf(epfiles->name, "ep%u", i);
+ epfile->dentry = ffs_sb_create_file(ffs->sb, epfiles->name,
+ epfile,
+ &ffs_epfile_operations);
+ if (unlikely(!epfile->dentry)) {
ffs_epfiles_destroy(epfiles, i - 1);
return -ENOMEM;
}
u8 *valuep, struct usb_descriptor_header *desc,
void *priv)
{
- struct ffs_data *ffs = priv;
+ struct ffs_desc_helper *helper = priv;
+ struct usb_endpoint_descriptor *d;
ENTER();
* encountered interface "n" then there are at least
* "n+1" interfaces.
*/
- if (*valuep >= ffs->interfaces_count)
- ffs->interfaces_count = *valuep + 1;
+ if (*valuep >= helper->interfaces_count)
+ helper->interfaces_count = *valuep + 1;
break;
case FFS_STRING:
* Strings are indexed from 1 (0 is magic ;) reserved
* for languages list or some such)
*/
- if (*valuep > ffs->strings_count)
- ffs->strings_count = *valuep;
+ if (*valuep > helper->ffs->strings_count)
+ helper->ffs->strings_count = *valuep;
break;
case FFS_ENDPOINT:
- /* Endpoints are indexed from 1 as well. */
- if ((*valuep & USB_ENDPOINT_NUMBER_MASK) > ffs->eps_count)
- ffs->eps_count = (*valuep & USB_ENDPOINT_NUMBER_MASK);
+ d = (void *)desc;
+ helper->eps_count++;
+ if (helper->eps_count >= 15)
+ return -EINVAL;
+ /* Check if descriptors for any speed were already parsed */
+ if (!helper->ffs->eps_count && !helper->ffs->interfaces_count)
+ helper->ffs->eps_addrmap[helper->eps_count] =
+ d->bEndpointAddress;
+ else if (helper->ffs->eps_addrmap[helper->eps_count] !=
+ d->bEndpointAddress)
+ return -EINVAL;
break;
}
char *data = _data, *raw_descs;
unsigned os_descs_count = 0, counts[3], flags;
int ret = -EINVAL, i;
+ struct ffs_desc_helper helper;
ENTER();
break;
case FUNCTIONFS_DESCRIPTORS_MAGIC_V2:
flags = get_unaligned_le32(data + 8);
+ ffs->user_flags = flags;
if (flags & ~(FUNCTIONFS_HAS_FS_DESC |
FUNCTIONFS_HAS_HS_DESC |
FUNCTIONFS_HAS_SS_DESC |
- FUNCTIONFS_HAS_MS_OS_DESC)) {
+ FUNCTIONFS_HAS_MS_OS_DESC |
+ FUNCTIONFS_VIRTUAL_ADDR)) {
ret = -ENOSYS;
goto error;
}
/* Read descriptors */
raw_descs = data;
+ helper.ffs = ffs;
for (i = 0; i < 3; ++i) {
if (!counts[i])
continue;
+ helper.interfaces_count = 0;
+ helper.eps_count = 0;
ret = ffs_do_descs(counts[i], data, len,
- __ffs_data_do_entity, ffs);
+ __ffs_data_do_entity, &helper);
if (ret < 0)
goto error;
+ if (!ffs->eps_count && !ffs->interfaces_count) {
+ ffs->eps_count = helper.eps_count;
+ ffs->interfaces_count = helper.interfaces_count;
+ } else {
+ if (ffs->eps_count != helper.eps_count) {
+ ret = -EINVAL;
+ goto error;
+ }
+ if (ffs->interfaces_count != helper.interfaces_count) {
+ ret = -EINVAL;
+ goto error;
+ }
+ }
data += ret;
len -= ret;
}
break;
default:
- BUG();
+ WARN(1, "%d: unknown event, this should not happen\n", type);
+ return;
}
{
spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
}
-
/* Bind/unbind USB function hooks *******************************************/
+static int ffs_ep_addr2idx(struct ffs_data *ffs, u8 endpoint_address)
+{
+ int i;
+
+ for (i = 1; i < ARRAY_SIZE(ffs->eps_addrmap); ++i)
+ if (ffs->eps_addrmap[i] == endpoint_address)
+ return i;
+ return -ENOENT;
+}
+
static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
struct usb_descriptor_header *desc,
void *priv)
struct usb_endpoint_descriptor *ds = (void *)desc;
struct ffs_function *func = priv;
struct ffs_ep *ffs_ep;
- unsigned ep_desc_id, idx;
+ unsigned ep_desc_id;
+ int idx;
static const char *speed_names[] = { "full", "high", "super" };
if (type != FFS_DESCRIPTOR)
if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT)
return 0;
- idx = (ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) - 1;
+ idx = ffs_ep_addr2idx(func->ffs, ds->bEndpointAddress) - 1;
+ if (idx < 0)
+ return idx;
+
ffs_ep = func->eps + idx;
if (unlikely(ffs_ep->descs[ep_desc_id])) {
} else {
struct usb_request *req;
struct usb_ep *ep;
+ u8 bEndpointAddress;
+ /*
+ * We back up bEndpointAddress because autoconfig overwrites
+ * it with physical endpoint address.
+ */
+ bEndpointAddress = ds->bEndpointAddress;
pr_vdebug("autoconfig\n");
ep = usb_ep_autoconfig(func->gadget, ds);
if (unlikely(!ep))
ffs_ep->req = req;
func->eps_revmap[ds->bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK] = idx + 1;
+ /*
+ * If we use virtual address mapping, we restore
+ * original bEndpointAddress value.
+ */
+ if (func->ffs->user_flags & FUNCTIONFS_VIRTUAL_ADDR)
+ ds->bEndpointAddress = bEndpointAddress;
}
ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength);
ret = ffs_func_revmap_ep(func, le16_to_cpu(creq->wIndex));
if (unlikely(ret < 0))
return ret;
+ if (func->ffs->user_flags & FUNCTIONFS_VIRTUAL_ADDR)
+ ret = func->ffs->eps_addrmap[ret];
break;
default:
projects / cascardo / linux.git / blobdiff