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--- drivers/lirc_dev/lirc_dev.h 2009/03/15 09:34:00 1.37
+++ drivers/lirc_dev/lirc_dev.h 2010/01/23 16:28:07 1.39
@@ -4,7 +4,7 @@
* (L) by Artur Lipowski <alipowski@interia.pl>
* This code is licensed under GNU GPL
*
- * $Id: lirc_dev.h,v 1.37 2009/03/15 09:34:00 lirc Exp $
+ * $Id: lirc_dev.h,v 1.39 2010/01/23 16:28:07 lirc Exp $
*
*/
@@ -30,14 +30,19 @@
struct lirc_buffer {
wait_queue_head_t wait_poll;
- spinlock_t lock;
+ spinlock_t fifo_lock;
unsigned int chunk_size;
unsigned int size; /* in chunks */
/* Using chunks instead of bytes pretends to simplify boundary checking
* And should allow for some performance fine tunning later */
#ifdef LIRC_HAVE_KFIFO
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
struct kfifo *fifo;
#else
+ struct kfifo fifo;
+ u8 fifo_initialized;
+#endif
+#else
unsigned int fill; /* in chunks */
int head, tail; /* in chunks */
unsigned char *data;
@@ -47,12 +52,12 @@
static inline void lirc_buffer_lock(struct lirc_buffer *buf,
unsigned long *flags)
{
- spin_lock_irqsave(&buf->lock, *flags);
+ spin_lock_irqsave(&buf->fifo_lock, *flags);
}
static inline void lirc_buffer_unlock(struct lirc_buffer *buf,
unsigned long *flags)
{
- spin_unlock_irqrestore(&buf->lock, *flags);
+ spin_unlock_irqrestore(&buf->fifo_lock, *flags);
}
static inline void _lirc_buffer_clear(struct lirc_buffer *buf)
{
@@ -64,10 +69,21 @@
static inline void lirc_buffer_clear(struct lirc_buffer *buf)
{
#ifdef LIRC_HAVE_KFIFO
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
if (buf->fifo)
kfifo_reset(buf->fifo);
#else
unsigned long flags;
+
+ if (buf->fifo_initialized) {
+ spin_lock_irqsave(&buf->fifo_lock, flags);
+ kfifo_reset(&buf->fifo);
+ spin_unlock_irqrestore(&buf->fifo_lock, flags);
+ }
+#endif
+#else
+ unsigned long flags;
+
lirc_buffer_lock(buf, &flags);
_lirc_buffer_clear(buf);
lirc_buffer_unlock(buf, &flags);
@@ -77,31 +93,47 @@
unsigned int chunk_size,
unsigned int size)
{
+ int ret = 0;
+
init_waitqueue_head(&buf->wait_poll);
- spin_lock_init(&buf->lock);
+ spin_lock_init(&buf->fifo_lock);
#ifndef LIRC_HAVE_KFIFO
_lirc_buffer_clear(buf);
#endif
buf->chunk_size = chunk_size;
buf->size = size;
#ifdef LIRC_HAVE_KFIFO
- buf->fifo = kfifo_alloc(size*chunk_size, GFP_KERNEL, &buf->lock);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+ buf->fifo = kfifo_alloc(size*chunk_size, GFP_KERNEL, &buf->fifo_lock);
if (!buf->fifo)
return -ENOMEM;
#else
+ ret = kfifo_alloc(&buf->fifo, size * chunk_size, GFP_KERNEL);
+ if (ret == 0)
+ buf->fifo_initialized = 1;
+#endif
+#else
buf->data = kmalloc(size*chunk_size, GFP_KERNEL);
if (buf->data == NULL)
return -ENOMEM;
memset(buf->data, 0, size*chunk_size);
#endif
- return 0;
+
+ return ret;
}
static inline void lirc_buffer_free(struct lirc_buffer *buf)
{
#ifdef LIRC_HAVE_KFIFO
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
if (buf->fifo)
kfifo_free(buf->fifo);
#else
+ if (buf->fifo_initialized) {
+ kfifo_free(&buf->fifo);
+ buf->fifo_initialized = 0;
+ }
+#endif
+#else
kfree(buf->data);
buf->data = NULL;
buf->head = 0;
@@ -111,6 +143,25 @@
buf->size = 0;
#endif
}
+
+#ifdef LIRC_HAVE_KFIFO
+static inline int lirc_buffer_len(struct lirc_buffer *buf)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+ return kfifo_len(buf->fifo);
+#else
+ int len;
+ unsigned long flags;
+
+ spin_lock_irqsave(&buf->fifo_lock, flags);
+ len = kfifo_len(&buf->fifo);
+ spin_unlock_irqrestore(&buf->fifo_lock, flags);
+
+ return len;
+#endif
+}
+#endif
+
#ifndef LIRC_HAVE_KFIFO
static inline int _lirc_buffer_full(struct lirc_buffer *buf)
{
@@ -120,7 +171,7 @@
static inline int lirc_buffer_full(struct lirc_buffer *buf)
{
#ifdef LIRC_HAVE_KFIFO
- return kfifo_len(buf->fifo) == buf->size * buf->chunk_size;
+ return lirc_buffer_len(buf) == buf->size * buf->chunk_size;
#else
unsigned long flags;
int ret;
@@ -139,7 +190,7 @@
static inline int lirc_buffer_empty(struct lirc_buffer *buf)
{
#ifdef LIRC_HAVE_KFIFO
- return !kfifo_len(buf->fifo);
+ return !lirc_buffer_len(buf);
#else
unsigned long flags;
int ret;
@@ -158,7 +209,7 @@
static inline int lirc_buffer_available(struct lirc_buffer *buf)
{
#ifdef LIRC_HAVE_KFIFO
- return buf->size - (kfifo_len(buf->fifo) / buf->chunk_size);
+ return buf->size - (lirc_buffer_len(buf) / buf->chunk_size);
#else
unsigned long flags;
int ret;
@@ -177,21 +228,30 @@
buf->fill -= 1;
}
#endif
-static inline void lirc_buffer_read(struct lirc_buffer *buf,
- unsigned char *dest)
+static inline unsigned int lirc_buffer_read(struct lirc_buffer *buf,
+ unsigned char *dest)
{
+ unsigned int ret = 0;
+
#ifdef LIRC_HAVE_KFIFO
- if (kfifo_len(buf->fifo) >= buf->chunk_size)
- kfifo_get(buf->fifo, dest, buf->chunk_size);
+ if (lirc_buffer_len(buf) >= buf->chunk_size)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+ ret = kfifo_get(buf->fifo, dest, buf->chunk_size);
+#else
+ ret = kfifo_out_locked(&buf->fifo, dest, buf->chunk_size,
+ &buf->fifo_lock);
+#endif
#else
unsigned long flags;
lirc_buffer_lock(buf, &flags);
_lirc_buffer_read_1(buf, dest);
lirc_buffer_unlock(buf, &flags);
#endif
+
+ return ret;
}
#ifndef LIRC_HAVE_KFIFO
-static inline void _lirc_buffer_write_1(struct lirc_buffer *buf,
+static inline _lirc_buffer_write_1(struct lirc_buffer *buf,
unsigned char *orig)
{
memcpy(&buf->data[buf->tail*buf->chunk_size], orig, buf->chunk_size);
@@ -199,17 +259,26 @@
buf->fill++;
}
#endif
-static inline void lirc_buffer_write(struct lirc_buffer *buf,
- unsigned char *orig)
+static inline unsigned int lirc_buffer_write(struct lirc_buffer *buf,
+ unsigned char *orig)
{
+ unsigned int ret = 0;
+
#ifdef LIRC_HAVE_KFIFO
- kfifo_put(buf->fifo, orig, buf->chunk_size);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+ ret = kfifo_put(buf->fifo, orig, buf->chunk_size);
+#else
+ ret = kfifo_in_locked(&buf->fifo, orig, buf->chunk_size,
+ &buf->fifo_lock);
+#endif
#else
unsigned long flags;
lirc_buffer_lock(buf, &flags);
_lirc_buffer_write_1(buf, orig);
lirc_buffer_unlock(buf, &flags);
#endif
+
+ return ret;
}
#ifndef LIRC_HAVE_KFIFO
static inline void _lirc_buffer_write_n(struct lirc_buffer *buf,
@@ -234,17 +303,26 @@
buf->fill += count;
}
#endif
-static inline void lirc_buffer_write_n(struct lirc_buffer *buf,
- unsigned char *orig, int count)
+static inline unsigned int lirc_buffer_write_n(struct lirc_buffer *buf,
+ unsigned char *orig, int count)
{
+ unsigned int ret = 0;
+
#ifdef LIRC_HAVE_KFIFO
- kfifo_put(buf->fifo, orig, count * buf->chunk_size);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+ ret = kfifo_put(buf->fifo, orig, count * buf->chunk_size);
+#else
+ ret = kfifo_in_locked(&buf->fifo, orig, count * buf->chunk_size,
+ &buf->fifo_lock);
+#endif
#else
unsigned long flags;
lirc_buffer_lock(buf, &flags);
_lirc_buffer_write_n(buf, orig, count);
lirc_buffer_unlock(buf, &flags);
#endif
+
+ return ret;
}
struct lirc_driver {
|
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