#include <linux/init.h>
#include <linux/wait.h>
#include <linux/usb.h>
+#include <linux/mutex.h>
/*-------------------------------------------------------------------*/
/* Debug support */
/* USB device context */
typedef struct
{
- struct semaphore mutex; /* protection in user context */
+ struct mutex mutex; /* protection in user context */
char name[20]; /* name of the /dev/usb entry */
unsigned int dtindex; /* index in the device table */
struct usb_device * usbdev; /* USB device handle */
/* character device context */
typedef struct
{
- struct semaphore mutex; /* protection in user context */
+ struct mutex mutex; /* protection in user context */
pauerswald_t auerdev; /* context pointer of assigned device */
auerbufctl_t bufctl; /* controls the buffer chain */
auerscon_t scontext; /* service context */
wait_queue_head_t readwait; /* for synchronous reading */
- struct semaphore readmutex; /* protection against multiple reads */
+ struct mutex readmutex; /* protection against multiple reads */
pauerbuf_t readbuf; /* buffer held for partial reading */
unsigned int readoffset; /* current offset in readbuf */
unsigned int removed; /* is != 0 if device is removed */
int result;
/* get pointer to element and to chain */
- pauerchainelement_t acep = (pauerchainelement_t) urb->context;
+ pauerchainelement_t acep = urb->context;
pauerchain_t acp = acep->chain;
/* restore original entries in urb */
/* completion handler for synchronous chained URBs */
static void auerchain_blocking_completion (struct urb *urb)
{
- pauerchain_chs_t pchs = (pauerchain_chs_t)urb->context;
+ pauerchain_chs_t pchs = urb->context;
pchs->done = 1;
wmb();
wake_up (&pchs->wqh);
/* Completion of asynchronous write block */
static void auerchar_ctrlwrite_complete (struct urb * urb)
{
- pauerbuf_t bp = (pauerbuf_t) urb->context;
+ pauerbuf_t bp = urb->context;
pauerswald_t cp = ((pauerswald_t)((char *)(bp->list)-(unsigned long)(&((pauerswald_t)0)->bufctl)));
dbg ("auerchar_ctrlwrite_complete called");
/* Completion handler for dummy retry packet */
static void auerswald_ctrlread_wretcomplete (struct urb * urb)
{
- pauerbuf_t bp = (pauerbuf_t) urb->context;
+ pauerbuf_t bp = urb->context;
pauerswald_t cp;
int ret;
int status = urb->status;
unsigned int serviceid;
pauerswald_t cp;
pauerscon_t scp;
- pauerbuf_t bp = (pauerbuf_t) urb->context;
+ pauerbuf_t bp = urb->context;
int status = urb->status;
int ret;
int ret;
int status = urb->status;
pauerbuf_t bp = NULL;
- pauerswald_t cp = (pauerswald_t) urb->context;
+ pauerswald_t cp = urb->context;
- dbg ("%s called", __FUNCTION__);
+ dbg ("%s called", __func__);
switch (status) {
case 0:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
- dbg("%s - urb shutting down with status: %d", __FUNCTION__, status);
+ dbg("%s - urb shutting down with status: %d", __func__, status);
return;
default:
- dbg("%s - nonzero urb status received: %d", __FUNCTION__, status);
+ dbg("%s - nonzero urb status received: %d", __func__, status);
goto exit;
}
ret = usb_submit_urb (urb, GFP_ATOMIC);
if (ret)
err ("%s - usb_submit_urb failed with result %d",
- __FUNCTION__, ret);
+ __func__, ret);
}
/* int memory deallocation
if (cp == NULL) {
return -ENODEV;
}
- if (down_interruptible (&cp->mutex)) {
+ if (mutex_lock_interruptible(&cp->mutex)) {
return -ERESTARTSYS;
}
}
/* Initialize device descriptor */
- init_MUTEX( &ccp->mutex);
- init_MUTEX( &ccp->readmutex);
+ mutex_init(&ccp->mutex);
+ mutex_init(&ccp->readmutex);
auerbuf_init (&ccp->bufctl);
ccp->scontext.id = AUH_UNASSIGNED;
ccp->scontext.dispatch = auerchar_ctrlread_dispatch;
cp->open_count++;
ccp->auerdev = cp;
dbg("open %s as /dev/%s", cp->dev_desc, cp->name);
- up (&cp->mutex);
+ mutex_unlock(&cp->mutex);
/* file IO stuff */
file->f_pos = 0;
return nonseekable_open(inode, file);
/* Error exit */
-ofail: up (&cp->mutex);
+ofail: mutex_unlock(&cp->mutex);
auerchar_delete (ccp);
return ret;
}
dbg ("ioctl");
/* get the mutexes */
- if (down_interruptible (&ccp->mutex)) {
+ if (mutex_lock_interruptible(&ccp->mutex)) {
return -ERESTARTSYS;
}
cp = ccp->auerdev;
if (!cp) {
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return -ENODEV;
}
- if (down_interruptible (&cp->mutex)) {
- up(&ccp->mutex);
+ if (mutex_lock_interruptible(&cp->mutex)) {
+ mutex_unlock(&ccp->mutex);
return -ERESTARTSYS;
}
/* Check for removal */
if (!cp->usbdev) {
- up(&cp->mutex);
- up(&ccp->mutex);
+ mutex_unlock(&cp->mutex);
+ mutex_unlock(&ccp->mutex);
return -ENODEV;
}
break;
}
/* release the mutexes */
- up(&cp->mutex);
- up(&ccp->mutex);
+ mutex_unlock(&cp->mutex);
+ mutex_unlock(&ccp->mutex);
return ret;
}
return 0;
/* get the mutex */
- if (down_interruptible (&ccp->mutex))
+ if (mutex_lock_interruptible(&ccp->mutex))
return -ERESTARTSYS;
/* Can we expect to read something? */
if (ccp->scontext.id == AUH_UNASSIGNED) {
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return -EIO;
}
/* only one reader per device allowed */
- if (down_interruptible (&ccp->readmutex)) {
- up (&ccp->mutex);
+ if (mutex_lock_interruptible(&ccp->readmutex)) {
+ mutex_unlock(&ccp->mutex);
return -ERESTARTSYS;
}
if (count) {
if (copy_to_user (buf, bp->bufp+ccp->readoffset, count)) {
dbg ("auerswald_read: copy_to_user failed");
- up (&ccp->readmutex);
- up (&ccp->mutex);
+ mutex_unlock(&ccp->readmutex);
+ mutex_unlock(&ccp->mutex);
return -EFAULT;
}
}
}
/* return with number of bytes read */
if (count) {
- up (&ccp->readmutex);
- up (&ccp->mutex);
+ mutex_unlock(&ccp->readmutex);
+ mutex_unlock(&ccp->mutex);
return count;
}
}
dbg ("No read buffer available, returning -EAGAIN");
set_current_state (TASK_RUNNING);
remove_wait_queue (&ccp->readwait, &wait);
- up (&ccp->readmutex);
- up (&ccp->mutex);
+ mutex_unlock(&ccp->readmutex);
+ mutex_unlock(&ccp->mutex);
return -EAGAIN; /* nonblocking, no data available */
}
/* yes, we should wait! */
- up (&ccp->mutex); /* allow other operations while we wait */
+ mutex_unlock(&ccp->mutex); /* allow other operations while we wait */
schedule();
remove_wait_queue (&ccp->readwait, &wait);
if (signal_pending (current)) {
/* waked up by a signal */
- up (&ccp->readmutex);
+ mutex_unlock(&ccp->readmutex);
return -ERESTARTSYS;
}
/* Anything left to read? */
if ((ccp->scontext.id == AUH_UNASSIGNED) || ccp->removed) {
- up (&ccp->readmutex);
+ mutex_unlock(&ccp->readmutex);
return -EIO;
}
- if (down_interruptible (&ccp->mutex)) {
- up (&ccp->readmutex);
+ if (mutex_lock_interruptible(&ccp->mutex)) {
+ mutex_unlock(&ccp->readmutex);
return -ERESTARTSYS;
}
write_again:
/* get the mutex */
- if (down_interruptible (&ccp->mutex))
+ if (mutex_lock_interruptible(&ccp->mutex))
return -ERESTARTSYS;
/* Can we expect to write something? */
if (ccp->scontext.id == AUH_UNASSIGNED) {
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return -EIO;
}
cp = ccp->auerdev;
if (!cp) {
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return -ERESTARTSYS;
}
- if (down_interruptible (&cp->mutex)) {
- up (&ccp->mutex);
+ if (mutex_lock_interruptible(&cp->mutex)) {
+ mutex_unlock(&ccp->mutex);
return -ERESTARTSYS;
}
if (!cp->usbdev) {
- up (&cp->mutex);
- up (&ccp->mutex);
+ mutex_unlock(&cp->mutex);
+ mutex_unlock(&ccp->mutex);
return -EIO;
}
/* Prepare for sleep */
/* are there any buffers left? */
if (!bp) {
- up (&cp->mutex);
- up (&ccp->mutex);
+ mutex_unlock(&cp->mutex);
+ mutex_unlock(&ccp->mutex);
/* NONBLOCK: don't wait */
if (file->f_flags & O_NONBLOCK) {
auerbuf_releasebuf (bp);
/* Wake up all processes waiting for a buffer */
wake_up (&cp->bufferwait);
- up (&cp->mutex);
- up (&ccp->mutex);
+ mutex_unlock(&cp->mutex);
+ mutex_unlock(&ccp->mutex);
return -EFAULT;
}
auerchar_ctrlwrite_complete, bp);
/* up we go */
ret = auerchain_submit_urb (&cp->controlchain, bp->urbp);
- up (&cp->mutex);
+ mutex_unlock(&cp->mutex);
if (ret) {
dbg ("auerchar_write: nonzero result of auerchain_submit_urb %d", ret);
auerbuf_releasebuf (bp);
/* Wake up all processes waiting for a buffer */
wake_up (&cp->bufferwait);
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return -EIO;
}
else {
dbg ("auerchar_write: Write OK");
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
return len;
}
}
pauerswald_t cp;
dbg("release");
- down(&ccp->mutex);
+ mutex_lock(&ccp->mutex);
cp = ccp->auerdev;
if (cp) {
- down(&cp->mutex);
+ mutex_lock(&cp->mutex);
/* remove an open service */
auerswald_removeservice (cp, &ccp->scontext);
/* detach from device */
if ((--cp->open_count <= 0) && (cp->usbdev == NULL)) {
/* usb device waits for removal */
- up (&cp->mutex);
+ mutex_unlock(&cp->mutex);
auerswald_delete (cp);
} else {
- up (&cp->mutex);
+ mutex_unlock(&cp->mutex);
}
cp = NULL;
ccp->auerdev = NULL;
}
- up (&ccp->mutex);
+ mutex_unlock(&ccp->mutex);
auerchar_delete (ccp);
return 0;
}
/* Initialize device descriptor */
- init_MUTEX (&cp->mutex);
+ mutex_init(&cp->mutex);
cp->usbdev = usbdev;
auerchain_init (&cp->controlchain);
auerbuf_init (&cp->bufctl);
/* give back our USB minor number */
usb_deregister_dev(intf, &auerswald_class);
- down (&cp->mutex);
+ mutex_lock(&cp->mutex);
info ("device /dev/%s now disconnecting", cp->name);
/* Stop the interrupt endpoint */
if (cp->open_count == 0) {
/* nobody is using this device. So we can clean up now */
- up (&cp->mutex);/* up() is possible here because no other task
- can open the device (see above). I don't want
- to kfree() a locked mutex. */
+ mutex_unlock(&cp->mutex);
+ /* mutex_unlock() is possible here because no other task
+ can open the device (see above). I don't want
+ to kfree() a locked mutex. */
+
auerswald_delete (cp);
} else {
/* device is used. Remove the pointer to the
usb device (it's not valid any more). The last
release() will do the clean up */
cp->usbdev = NULL;
- up (&cp->mutex);
+ mutex_unlock(&cp->mutex);
/* Terminate waiting writers */
wake_up (&cp->bufferwait);
/* Inform all waiting readers */
projects / linux-2.6-omap-h63xx.git / blobdiff