This commit changes FunctionFS as to make it more compliant
with coding style as well as fixes several typos.
Signed-off-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
---
drivers/usb/gadget/f_fs.c | 318 ++++++++++++++++++++++----------------------
drivers/usb/gadget/g_ffs.c | 39 +++---
2 files changed, 183 insertions(+), 174 deletions(-)
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index f276e95..b48a08a 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -1,10 +1,10 @@
/*
- * f_fs.c -- user mode filesystem api for usb composite funtcion controllers
+ * f_fs.c -- user mode file system API for USB composite function controllers
*
* Copyright (C) 2010 Samsung Electronics
* Author: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
*
- * Based on inode.c (GadgetFS):
+ * Based on inode.c (GadgetFS) which was:
* Copyright (C) 2003-2004 David Brownell
* Copyright (C) 2003 Agilent Technologies
*
@@ -39,7 +39,7 @@
#define FUNCTIONFS_MAGIC 0xa647361 /* Chosen by a honest dice roll ;) */
-/* Debuging *****************************************************************/
+/* Debugging ****************************************************************/
#define ffs_printk(level, fmt, args...) printk(level "f_fs: " fmt "\n", ## args)
@@ -71,30 +71,39 @@
/* The data structure and setup file ****************************************/
enum ffs_state {
- /* Waiting for descriptors and strings. */
- /* In this state no open(2), read(2) or write(2) on epfiles
+ /*
+ * Waiting for descriptors and strings.
+ *
+ * In this state no open(2), read(2) or write(2) on epfiles
* may succeed (which should not be the problem as there
- * should be no such files opened in the firts place). */
+ * should be no such files opened in the first place).
+ */
FFS_READ_DESCRIPTORS,
FFS_READ_STRINGS,
- /* We've got descriptors and strings. We are or have called
+ /*
+ * We've got descriptors and strings. We are or have called
* functionfs_ready_callback(). functionfs_bind() may have
- * been called but we don't know. */
- /* This is the only state in which operations on epfiles may
- * succeed. */
+ * been called but we don't know.
+ *
+ * This is the only state in which operations on epfiles may
+ * succeed.
+ */
FFS_ACTIVE,
- /* All endpoints have been closed. This state is also set if
+ /*
+ * All endpoints have been closed. This state is also set if
* we encounter an unrecoverable error. The only
* unrecoverable error is situation when after reading strings
- * from user space we fail to initialise EP files or
- * functionfs_ready_callback() returns with error (<0). */
- /* In this state no open(2), read(2) or write(2) (both on ep0
+ * from user space we fail to initialise epfiles or
+ * functionfs_ready_callback() returns with error (<0).
+ *
+ * In this state no open(2), read(2) or write(2) (both on ep0
* as well as epfile) may succeed (at this point epfiles are
* unlinked and all closed so this is not a problem; ep0 is
* also closed but ep0 file exists and so open(2) on ep0 must
- * fail). */
+ * fail).
+ */
FFS_CLOSING
};
@@ -102,14 +111,18 @@ enum ffs_state {
enum ffs_setup_state {
/* There is no setup request pending. */
FFS_NO_SETUP,
- /* User has read events and there was a setup request event
+ /*
+ * User has read events and there was a setup request event
* there. The next read/write on ep0 will handle the
- * request. */
+ * request.
+ */
FFS_SETUP_PENDING,
- /* There was event pending but before user space handled it
+ /*
+ * There was event pending but before user space handled it
* some other event was introduced which canceled existing
* setup. If this state is set read/write on ep0 return
- * -EIDRM. This state is only set when adding event. */
+ * -EIDRM. This state is only set when adding event.
+ */
FFS_SETUP_CANCELED
};
@@ -121,23 +134,29 @@ struct ffs_function;
struct ffs_data {
struct usb_gadget *gadget;
- /* Protect access read/write operations, only one read/write
+ /*
+ * Protect access read/write operations, only one read/write
* at a time. As a consequence protects ep0req and company.
* While setup request is being processed (queued) this is
- * held. */
+ * held.
+ */
struct mutex mutex;
- /* Protect access to enpoint related structures (basically
+ /*
+ * Protect access to endpoint related structures (basically
* usb_ep_queue(), usb_ep_dequeue(), etc. calls) except for
- * endpint zero. */
+ * endpoint zero.
+ */
spinlock_t eps_lock;
- /* XXX REVISIT do we need our own request? Since we are not
- * handling setup requests immidiatelly user space may be so
+ /*
+ * XXX REVISIT do we need our own request? Since we are not
+ * handling setup requests immediately user space may be so
* slow that another setup will be sent to the gadget but this
* time not to us but another function and then there could be
* a race. Is that the case? Or maybe we can use cdev->req
- * after all, maybe we just need some spinlock for that? */
+ * after all, maybe we just need some spinlock for that?
+ */
struct usb_request *ep0req; /* P: mutex */
struct completion ep0req_completion; /* P: mutex */
int ep0req_status; /* P: mutex */
@@ -151,7 +170,7 @@ struct ffs_data {
enum ffs_state state;
/*
- * Possible transations:
+ * Possible transitions:
* + FFS_NO_SETUP -> FFS_SETUP_PENDING -- P: ev.waitq.lock
* happens only in ep0 read which is P: mutex
* + FFS_SETUP_PENDING -> FFS_NO_SETUP -- P: ev.waitq.lock
@@ -184,18 +203,21 @@ struct ffs_data {
/* Active function */
struct ffs_function *func;
- /* Device name, write once when file system is mounted.
- * Intendet for user to read if she wants. */
+ /*
+ * Device name, write once when file system is mounted.
+ * Intended for user to read if she wants.
+ */
const char *dev_name;
- /* Private data for our user (ie. gadget). Managed by
- * user. */
+ /* Private data for our user (ie. gadget). Managed by user. */
void *private_data;
/* filled by __ffs_data_got_descs() */
- /* real descriptors are 16 bytes after raw_descs (so you need
+ /*
+ * Real descriptors are 16 bytes after raw_descs (so you need
* to skip 16 bytes (ie. ffs->raw_descs + 16) to get to the
* first full speed descriptor). raw_descs_length and
- * raw_fs_descs_length do not have those 16 bytes added. */
+ * raw_fs_descs_length do not have those 16 bytes added.
+ */
const void *raw_descs;
unsigned raw_descs_length;
unsigned raw_fs_descs_length;
@@ -212,18 +234,23 @@ struct ffs_data {
const void *raw_strings;
struct usb_gadget_strings **stringtabs;
- /* File system's super block, write once when file system is mounted. */
+ /*
+ * File system's super block, write once when file system is
+ * mounted.
+ */
struct super_block *sb;
- /* File permissions, written once when fs is mounted*/
+ /* File permissions, written once when fs is mounted */
struct ffs_file_perms {
umode_t mode;
uid_t uid;
gid_t gid;
} file_perms;
- /* The endpoint files, filled by ffs_epfiles_create(),
- * destroyed by ffs_epfiles_destroy(). */
+ /*
+ * The endpoint files, filled by ffs_epfiles_create(),
+ * destroyed by ffs_epfiles_destroy().
+ */
struct ffs_epfile *epfiles;
};
@@ -237,7 +264,7 @@ static struct ffs_data *__must_check ffs_data_new(void) __attribute__((malloc));
static void ffs_data_opened(struct ffs_data *ffs);
static void ffs_data_closed(struct ffs_data *ffs);
-/* Called with ffs->mutex held; take over ownerrship of data. */
+/* Called with ffs->mutex held; take over ownership of data. */
static int __must_check
__ffs_data_got_descs(struct ffs_data *ffs, char *data, size_t len);
static int __must_check
@@ -268,11 +295,9 @@ static struct ffs_function *ffs_func_from_usb(struct usb_function *f)
static void ffs_func_free(struct ffs_function *func);
-
static void ffs_func_eps_disable(struct ffs_function *func);
static int __must_check ffs_func_eps_enable(struct ffs_function *func);
-
static int ffs_func_bind(struct usb_configuration *,
struct usb_function *);
static void ffs_func_unbind(struct usb_configuration *,
@@ -289,7 +314,6 @@ static int ffs_func_revmap_ep(struct ffs_function *func, u8 num);
static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf);
-
/* The endpoints structures *************************************************/
struct ffs_ep {
@@ -322,7 +346,6 @@ struct ffs_epfile {
unsigned char _pad;
};
-
static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
@@ -349,7 +372,6 @@ static void ffs_ep0_complete(struct usb_ep *ep, struct usb_request *req)
complete_all(&ffs->ep0req_completion);
}
-
static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
{
struct usb_request *req = ffs->ep0req;
@@ -391,7 +413,6 @@ static int __ffs_ep0_stall(struct ffs_data *ffs)
}
}
-
static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
size_t len, loff_t *ptr)
{
@@ -410,7 +431,6 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
if (unlikely(ret < 0))
return ret;
-
/* Check state */
switch (ffs->state) {
case FFS_READ_DESCRIPTORS:
@@ -462,11 +482,12 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
}
break;
-
case FFS_ACTIVE:
data = NULL;
- /* We're called from user space, we can use _irq
- * rather then _irqsave */
+ /*
+ * We're called from user space, we can use _irq
+ * rather then _irqsave
+ */
spin_lock_irq(&ffs->ev.waitq.lock);
switch (FFS_SETUP_STATE(ffs)) {
case FFS_SETUP_CANCELED:
@@ -501,16 +522,18 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
spin_lock_irq(&ffs->ev.waitq.lock);
- /* We are guaranteed to be still in FFS_ACTIVE state
+ /*
+ * We are guaranteed to be still in FFS_ACTIVE state
* but the state of setup could have changed from
* FFS_SETUP_PENDING to FFS_SETUP_CANCELED so we need
* to check for that. If that happened we copied data
- * from user space in vain but it's unlikely. */
- /* For sure we are not in FFS_NO_SETUP since this is
+ * from user space in vain but it's unlikely.
+ *
+ * For sure we are not in FFS_NO_SETUP since this is
* the only place FFS_SETUP_PENDING -> FFS_NO_SETUP
* transition can be performed and it's protected by
- * mutex. */
-
+ * mutex.
+ */
if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED) {
ret = -EIDRM;
done_spin:
@@ -522,25 +545,22 @@ done_spin:
kfree(data);
break;
-
default:
ret = -EBADFD;
break;
}
-
mutex_unlock(&ffs->mutex);
return ret;
}
-
-
static ssize_t __ffs_ep0_read_events(struct ffs_data *ffs, char __user *buf,
size_t n)
{
- /* We are holding ffs->ev.waitq.lock and ffs->mutex and we need
- * to release them. */
-
+ /*
+ * We are holding ffs->ev.waitq.lock and ffs->mutex and we need
+ * to release them.
+ */
struct usb_functionfs_event events[n];
unsigned i = 0;
@@ -569,7 +589,6 @@ static ssize_t __ffs_ep0_read_events(struct ffs_data *ffs, char __user *buf,
? -EFAULT : sizeof events;
}
-
static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
size_t len, loff_t *ptr)
{
@@ -589,16 +608,16 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
if (unlikely(ret < 0))
return ret;
-
/* Check state */
if (ffs->state != FFS_ACTIVE) {
ret = -EBADFD;
goto done_mutex;
}
-
- /* We're called from user space, we can use _irq rather then
- * _irqsave */
+ /*
+ * We're called from user space, we can use _irq rather then
+ * _irqsave
+ */
spin_lock_irq(&ffs->ev.waitq.lock);
switch (FFS_SETUP_STATE(ffs)) {
@@ -618,7 +637,8 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
break;
}
- if (unlikely(wait_event_interruptible_exclusive_locked_irq(ffs->ev.waitq, ffs->ev.count))) {
+ if (wait_event_interruptible_exclusive_locked_irq(ffs->ev.waitq,
+ ffs->ev.count)) {
ret = -EINTR;
break;
}
@@ -626,7 +646,6 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
return __ffs_ep0_read_events(ffs, buf,
min(n, (size_t)ffs->ev.count));
-
case FFS_SETUP_PENDING:
if (ffs->ev.setup.bRequestType & USB_DIR_IN) {
spin_unlock_irq(&ffs->ev.waitq.lock);
@@ -672,8 +691,6 @@ done_mutex:
return ret;
}
-
-
static int ffs_ep0_open(struct inode *inode, struct file *file)
{
struct ffs_data *ffs = inode->i_private;
@@ -689,7 +706,6 @@ static int ffs_ep0_open(struct inode *inode, struct file *file)
return 0;
}
-
static int ffs_ep0_release(struct inode *inode, struct file *file)
{
struct ffs_data *ffs = file->private_data;
@@ -701,7 +717,6 @@ static int ffs_ep0_release(struct inode *inode, struct file *file)
return 0;
}
-
static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
{
struct ffs_data *ffs = file->private_data;
@@ -722,7 +737,6 @@ static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
return ret;
}
-
static const struct file_operations ffs_ep0_operations = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -737,7 +751,6 @@ static const struct file_operations ffs_ep0_operations = {
/* "Normal" endpoints operations ********************************************/
-
static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
{
ENTER();
@@ -748,7 +761,6 @@ static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
}
}
-
static ssize_t ffs_epfile_io(struct file *file,
char __user *buf, size_t len, int read)
{
@@ -778,8 +790,8 @@ first_try:
goto error;
}
- if (unlikely(wait_event_interruptible
- (epfile->wait, (ep = epfile->ep)))) {
+ if (wait_event_interruptible(epfile->wait,
+ (ep = epfile->ep))) {
ret = -EINTR;
goto error;
}
@@ -811,12 +823,16 @@ first_try:
if (unlikely(ret))
goto error;
- /* We're called from user space, we can use _irq rather then
- * _irqsave */
+ /*
+ * We're called from user space, we can use _irq rather then
+ * _irqsave
+ */
spin_lock_irq(&epfile->ffs->eps_lock);
- /* While we were acquiring mutex endpoint got disabled
- * or changed? */
+ /*
+ * While we were acquiring mutex endpoint got disabled
+ * or changed?
+ */
} while (unlikely(epfile->ep != ep));
/* Halt */
@@ -858,7 +874,6 @@ error:
return ret;
}
-
static ssize_t
ffs_epfile_write(struct file *file, const char __user *buf, size_t len,
loff_t *ptr)
@@ -904,7 +919,6 @@ ffs_epfile_release(struct inode *inode, struct file *file)
return 0;
}
-
static long ffs_epfile_ioctl(struct file *file, unsigned code,
unsigned long value)
{
@@ -943,7 +957,6 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
return ret;
}
-
static const struct file_operations ffs_epfile_operations = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -956,15 +969,13 @@ static const struct file_operations ffs_epfile_operations = {
};
-
/* File system and super block operations ***********************************/
/*
- * Mounting the filesystem creates a controller file, used first for
+ * Mounting the file system creates a controller file, used first for
* function configuration then later for event monitoring.
*/
-
static struct inode *__must_check
ffs_sb_make_inode(struct super_block *sb, void *data,
const struct file_operations *fops,
@@ -997,9 +1008,7 @@ ffs_sb_make_inode(struct super_block *sb, void *data,
return inode;
}
-
/* Create "regular" file */
-
static struct inode *ffs_sb_create_file(struct super_block *sb,
const char *name, void *data,
const struct file_operations *fops,
@@ -1028,9 +1037,7 @@ static struct inode *ffs_sb_create_file(struct super_block *sb,
return inode;
}
-
/* Super block */
-
static const struct super_operations ffs_sb_operations = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
@@ -1051,7 +1058,7 @@ static int ffs_sb_fill(struct super_block *sb, void *_data, int silent)
ENTER();
- /* Initialize data */
+ /* Initialise data */
ffs = ffs_data_new();
if (unlikely(!ffs))
goto enomem0;
@@ -1097,7 +1104,6 @@ enomem0:
return -ENOMEM;
}
-
static int ffs_fs_parse_opts(struct ffs_sb_fill_data *data, char *opts)
{
ENTER();
@@ -1173,9 +1179,7 @@ invalid:
return 0;
}
-
/* "mount -t functionfs dev_name /dev/function" ends up here */
-
static int
ffs_fs_get_sb(struct file_system_type *t, int flags,
const char *dev_name, void *opts, struct vfsmount *mnt)
@@ -1225,10 +1229,8 @@ static struct file_system_type ffs_fs_type = {
};
-
/* Driver's main init/cleanup functions *************************************/
-
static int functionfs_init(void)
{
int ret;
@@ -1253,13 +1255,11 @@ static void functionfs_cleanup(void)
}
-
/* ffs_data and ffs_function construction and destruction code **************/
static void ffs_data_clear(struct ffs_data *ffs);
static void ffs_data_reset(struct ffs_data *ffs);
-
static void ffs_data_get(struct ffs_data *ffs)
{
ENTER();
@@ -1290,8 +1290,6 @@ static void ffs_data_put(struct ffs_data *ffs)
}
}
-
-
static void ffs_data_closed(struct ffs_data *ffs)
{
ENTER();
@@ -1304,7 +1302,6 @@ static void ffs_data_closed(struct ffs_data *ffs)
ffs_data_put(ffs);
}
-
static struct ffs_data *ffs_data_new(void)
{
struct ffs_data *ffs = kzalloc(sizeof *ffs, GFP_KERNEL);
@@ -1327,7 +1324,6 @@ static struct ffs_data *ffs_data_new(void)
return ffs;
}
-
static void ffs_data_clear(struct ffs_data *ffs)
{
ENTER();
@@ -1345,7 +1341,6 @@ static void ffs_data_clear(struct ffs_data *ffs)
kfree(ffs->stringtabs);
}
-
static void ffs_data_reset(struct ffs_data *ffs)
{
ENTER();
@@ -1408,7 +1403,6 @@ static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
return 0;
}
-
static void functionfs_unbind(struct ffs_data *ffs)
{
ENTER();
@@ -1421,7 +1415,6 @@ static void functionfs_unbind(struct ffs_data *ffs)
}
}
-
static int ffs_epfiles_create(struct ffs_data *ffs)
{
struct ffs_epfile *epfile, *epfiles;
@@ -1452,7 +1445,6 @@ static int ffs_epfiles_create(struct ffs_data *ffs)
return 0;
}
-
static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
{
struct ffs_epfile *epfile = epfiles;
@@ -1472,7 +1464,6 @@ static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
kfree(epfiles);
}
-
static int functionfs_bind_config(struct usb_composite_dev *cdev,
struct usb_configuration *c,
struct ffs_data *ffs)
@@ -1492,7 +1483,6 @@ static int functionfs_bind_config(struct usb_composite_dev *cdev,
func->function.bind = ffs_func_bind;
func->function.unbind = ffs_func_unbind;
func->function.set_alt = ffs_func_set_alt;
- /*func->function.get_alt = ffs_func_get_alt;*/
func->function.disable = ffs_func_disable;
func->function.setup = ffs_func_setup;
func->function.suspend = ffs_func_suspend;
@@ -1517,14 +1507,15 @@ static void ffs_func_free(struct ffs_function *func)
ffs_data_put(func->ffs);
kfree(func->eps);
- /* eps and interfaces_nums are allocated in the same chunk so
+ /*
+ * eps and interfaces_nums are allocated in the same chunk so
* only one free is required. Descriptors are also allocated
- * in the same chunk. */
+ * in the same chunk.
+ */
kfree(func);
}
-
static void ffs_func_eps_disable(struct ffs_function *func)
{
struct ffs_ep *ep = func->eps;
@@ -1582,11 +1573,12 @@ static int ffs_func_eps_enable(struct ffs_function *func)
/* Parsing and building descriptors and strings *****************************/
-
-/* This validates if data pointed by data is a valid USB descriptor as
+/*
+ * This validates if data pointed by data is a valid USB descriptor as
* well as record how many interfaces, endpoints and strings are
- * required by given configuration. Returns address afther the
- * descriptor or NULL if data is invalid. */
+ * required by given configuration. Returns address after the
+ * descriptor or NULL if data is invalid.
+ */
enum ffs_entity_type {
FFS_DESCRIPTOR, FFS_INTERFACE, FFS_STRING, FFS_ENDPOINT
@@ -1643,7 +1635,8 @@ static int __must_check ffs_do_desc(char *data, unsigned len,
case USB_DT_STRING:
case USB_DT_DEVICE_QUALIFIER:
/* function can't have any of those */
- FVDBG("descriptor reserved for gadget: %d", _ds->bDescriptorType);
+ FVDBG("descriptor reserved for gadget: %d",
+ _ds->bDescriptorType);
return -EINVAL;
case USB_DT_INTERFACE: {
@@ -1697,7 +1690,7 @@ static int __must_check ffs_do_desc(char *data, unsigned len,
FVDBG("unknown descriptor: %d", _ds->bDescriptorType);
return -EINVAL;
- inv_length:
+inv_length:
FVDBG("invalid length: %d (descriptor %d)",
_ds->bLength, _ds->bDescriptorType);
return -EINVAL;
@@ -1712,7 +1705,6 @@ static int __must_check ffs_do_desc(char *data, unsigned len,
return length;
}
-
static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
ffs_entity_callback entity, void *priv)
{
@@ -1727,7 +1719,7 @@ static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
if (num == count)
data = NULL;
- /* Record "descriptor" entitny */
+ /* Record "descriptor" entity */
ret = entity(FFS_DESCRIPTOR, (u8 *)num, (void *)data, priv);
if (unlikely(ret < 0)) {
FDBG("entity DESCRIPTOR(%02lx); ret = %d", num, ret);
@@ -1749,7 +1741,6 @@ static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
}
}
-
static int __ffs_data_do_entity(enum ffs_entity_type type,
u8 *valuep, struct usb_descriptor_header *desc,
void *priv)
@@ -1763,16 +1754,20 @@ static int __ffs_data_do_entity(enum ffs_entity_type type,
break;
case FFS_INTERFACE:
- /* Interfaces are indexed from zero so if we
+ /*
+ * Interfaces are indexed from zero so if we
* encountered interface "n" then there are at least
- * "n+1" interfaces. */
+ * "n+1" interfaces.
+ */
if (*valuep >= ffs->interfaces_count)
ffs->interfaces_count = *valuep + 1;
break;
case FFS_STRING:
- /* Strings are indexed from 1 (0 is magic ;) reserved
- * for languages list or some such) */
+ /*
+ * Strings are indexed from 1 (0 is magic ;) reserved
+ * for languages list or some such)
+ */
if (*valuep > ffs->strings_count)
ffs->strings_count = *valuep;
break;
@@ -1787,7 +1782,6 @@ static int __ffs_data_do_entity(enum ffs_entity_type type,
return 0;
}
-
static int __ffs_data_got_descs(struct ffs_data *ffs,
char *const _data, size_t len)
{
@@ -1850,8 +1844,6 @@ error:
return ret;
}
-
-
static int __ffs_data_got_strings(struct ffs_data *ffs,
char *const _data, size_t len)
{
@@ -1886,8 +1878,10 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
/* Allocate */
{
- /* Allocate everything in one chunk so there's less
- * maintanance. */
+ /*
+ * Allocate everything in one chunk so there's less
+ * maintenance.
+ */
struct {
struct usb_gadget_strings *stringtabs[lang_count + 1];
struct usb_gadget_strings stringtab[lang_count];
@@ -1938,13 +1932,17 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
if (unlikely(length == len))
goto error_free;
- /* user may provide more strings then we need,
- * if that's the case we simply ingore the
- * rest */
+ /*
+ * User may provide more strings then we need,
+ * if that's the case we simply ignore the
+ * rest
+ */
if (likely(needed)) {
- /* s->id will be set while adding
+ /*
+ * s->id will be set while adding
* function to configuration so for
- * now just leave garbage here. */
+ * now just leave garbage here.
+ */
s->s = data;
--needed;
++s;
@@ -1978,8 +1976,6 @@ error:
}
-
-
/* Events handling and management *******************************************/
static void __ffs_event_add(struct ffs_data *ffs,
@@ -1988,18 +1984,21 @@ static void __ffs_event_add(struct ffs_data *ffs,
enum usb_functionfs_event_type rem_type1, rem_type2 = type;
int neg = 0;
- /* Abort any unhandled setup */
- /* We do not need to worry about some cmpxchg() changing value
+ /*
+ * Abort any unhandled setup
+ *
+ * We do not need to worry about some cmpxchg() changing value
* of ffs->setup_state without holding the lock because when
* state is FFS_SETUP_PENDING cmpxchg() in several places in
- * the source does nothing. */
+ * the source does nothing.
+ */
if (ffs->setup_state == FFS_SETUP_PENDING)
ffs->setup_state = FFS_SETUP_CANCELED;
switch (type) {
case FUNCTIONFS_RESUME:
rem_type2 = FUNCTIONFS_SUSPEND;
- /* FALL THGOUTH */
+ /* FALL THROUGH */
case FUNCTIONFS_SUSPEND:
case FUNCTIONFS_SETUP:
rem_type1 = type;
@@ -2056,8 +2055,10 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
struct ffs_function *func = priv;
struct ffs_ep *ffs_ep;
- /* If hs_descriptors is not NULL then we are reading hs
- * descriptors now */
+ /*
+ * If hs_descriptors is not NULL then we are reading hs
+ * descriptors now
+ */
const int isHS = func->function.hs_descriptors != NULL;
unsigned idx;
@@ -2112,7 +2113,6 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
return 0;
}
-
static int __ffs_func_bind_do_nums(enum ffs_entity_type type, u8 *valuep,
struct usb_descriptor_header *desc,
void *priv)
@@ -2144,8 +2144,10 @@ static int __ffs_func_bind_do_nums(enum ffs_entity_type type, u8 *valuep,
break;
case FFS_ENDPOINT:
- /* USB_DT_ENDPOINT are handled in
- * __ffs_func_bind_do_descs(). */
+ /*
+ * USB_DT_ENDPOINT are handled in
+ * __ffs_func_bind_do_descs().
+ */
if (desc->bDescriptorType == USB_DT_ENDPOINT)
return 0;
@@ -2212,9 +2214,11 @@ static int ffs_func_bind(struct usb_configuration *c,
func->eps = data->eps;
func->interfaces_nums = data->inums;
- /* Go throught all the endpoint descriptors and allocate
+ /*
+ * Go through all the endpoint descriptors and allocate
* endpoints first, so that later we can rewrite the endpoint
- * numbers without worying that it may be described later on. */
+ * numbers without worrying that it may be described later on.
+ */
if (likely(full)) {
func->function.descriptors = data->fs_descs;
ret = ffs_do_descs(ffs->fs_descs_count,
@@ -2235,9 +2239,11 @@ static int ffs_func_bind(struct usb_configuration *c,
__ffs_func_bind_do_descs, func);
}
- /* Now handle interface numbers allocation and interface and
- * enpoint numbers rewritting. We can do that in one go
- * now. */
+ /*
+ * Now handle interface numbers allocation and interface and
+ * endpoint numbers rewriting. We can do that in one go
+ * now.
+ */
ret = ffs_do_descs(ffs->fs_descs_count +
(high ? ffs->hs_descs_count : 0),
data->raw_descs, sizeof data->raw_descs,
@@ -2275,7 +2281,6 @@ static void ffs_func_unbind(struct usb_configuration *c,
ffs_func_free(func);
}
-
static int ffs_func_set_alt(struct usb_function *f,
unsigned interface, unsigned alt)
{
@@ -2329,14 +2334,15 @@ static int ffs_func_setup(struct usb_function *f,
FVDBG("creq->wIndex = %04x", le16_to_cpu(creq->wIndex));
FVDBG("creq->wLength = %04x", le16_to_cpu(creq->wLength));
- /* Most requests directed to interface go throught here
+ /*
+ * Most requests directed to interface go through here
* (notable exceptions are set/get interface) so we need to
* handle them. All other either handled by composite or
* passed to usb_configuration->setup() (if one is set). No
* matter, we will handle requests directed to endpoint here
* as well (as it's straightforward) but what to do with any
- * other request? */
-
+ * other request?
+ */
if (ffs->state != FFS_ACTIVE)
return -ENODEV;
@@ -2379,8 +2385,7 @@ static void ffs_func_resume(struct usb_function *f)
}
-
-/* Enpoint and interface numbers reverse mapping ****************************/
+/* Endpoint and interface numbers reverse mapping ***************************/
static int ffs_func_revmap_ep(struct ffs_function *func, u8 num)
{
@@ -2411,7 +2416,6 @@ static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
: mutex_lock_interruptible(mutex);
}
-
static char *ffs_prepare_buffer(const char * __user buf, size_t len)
{
char *data;
diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index af75e36..3dc1989 100644
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -1,7 +1,27 @@
+/*
+ * g_ffs.c -- user mode file system API for USB composite function controllers
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ * Author: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
#include <linux/module.h>
#include <linux/utsname.h>
-
/*
* kbuild is not very cooperative with respect to linking separately
* compiled library objects into one module. So for now we won't use
@@ -43,7 +63,6 @@ static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
#include "f_fs.c"
-
#define DRIVER_NAME "g_ffs"
#define DRIVER_DESC "USB Function Filesystem"
#define DRIVER_VERSION "24 Aug 2004"
@@ -73,8 +92,6 @@ MODULE_PARM_DESC(bDeviceSubClass, "USB Device subclass");
module_param_named(bDeviceProtocol, gfs_dev_desc.bDeviceProtocol, byte, 0644);
MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol");
-
-
static const struct usb_descriptor_header *gfs_otg_desc[] = {
(const struct usb_descriptor_header *)
&(const struct usb_otg_descriptor) {
@@ -91,8 +108,7 @@ static const struct usb_descriptor_header *gfs_otg_desc[] = {
NULL
};
-/* string IDs are assigned dynamically */
-
+/* String IDs are assigned dynamically */
static struct usb_string gfs_strings[] = {
#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
{ .s = "FunctionFS + RNDIS" },
@@ -114,8 +130,6 @@ static struct usb_gadget_strings *gfs_dev_strings[] = {
NULL,
};
-
-
struct gfs_configuration {
struct usb_configuration c;
int (*eth)(struct usb_configuration *c, u8 *ethaddr);
@@ -138,7 +152,6 @@ struct gfs_configuration {
#endif
};
-
static int gfs_bind(struct usb_composite_dev *cdev);
static int gfs_unbind(struct usb_composite_dev *cdev);
static int gfs_do_config(struct usb_configuration *c);
@@ -151,11 +164,9 @@ static struct usb_composite_driver gfs_driver = {
.iProduct = DRIVER_DESC,
};
-
static struct ffs_data *gfs_ffs_data;
static unsigned long gfs_registered;
-
static int gfs_init(void)
{
ENTER();
@@ -175,7 +186,6 @@ static void gfs_exit(void)
}
module_exit(gfs_exit);
-
static int functionfs_ready_callback(struct ffs_data *ffs)
{
int ret;
@@ -200,14 +210,11 @@ static void functionfs_closed_callback(struct ffs_data *ffs)
usb_composite_unregister(&gfs_driver);
}
-
static int functionfs_check_dev_callback(const char *dev_name)
{
return 0;
}
-
-
static int gfs_bind(struct usb_composite_dev *cdev)
{
int ret, i;
@@ -274,7 +281,6 @@ static int gfs_unbind(struct usb_composite_dev *cdev)
return 0;
}
-
static int gfs_do_config(struct usb_configuration *c)
{
struct gfs_configuration *gc =
@@ -315,7 +321,6 @@ static int gfs_do_config(struct usb_configuration *c)
return 0;
}
-
#ifdef CONFIG_USB_FUNCTIONFS_ETH
static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
--
1.7.1
--
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