[media] saa7164: convert buffering structs to be more generic
Current structs assume transport, making a number of changes to
switch to generic functions allowing a smoother integration
for the analog encoder.
Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/saa7164/saa7164-api.c b/drivers/media/video/saa7164/saa7164-api.c
index 1702baa..a810e6d 100644
--- a/drivers/media/video/saa7164/saa7164-api.c
+++ b/drivers/media/video/saa7164/saa7164-api.c
@@ -24,7 +24,7 @@
#include "saa7164.h"
-int saa7164_api_transition_port(struct saa7164_tsport *port, u8 mode)
+int saa7164_api_transition_port(struct saa7164_port *port, u8 mode)
{
int ret;
@@ -63,7 +63,7 @@
int saa7164_api_configure_port_mpeg2ts(struct saa7164_dev *dev,
- struct saa7164_tsport *port,
+ struct saa7164_port *port,
tmComResTSFormatDescrHeader_t *tsfmt)
{
dprintk(DBGLVL_API, " bFormatIndex = 0x%x\n", tsfmt->bFormatIndex);
@@ -98,7 +98,7 @@
int saa7164_api_dump_subdevs(struct saa7164_dev *dev, u8 *buf, int len)
{
- struct saa7164_tsport *port = 0;
+ struct saa7164_port *port = 0;
u32 idx, next_offset;
int i;
tmComResDescrHeader_t *hdr, *t;
diff --git a/drivers/media/video/saa7164/saa7164-buffer.c b/drivers/media/video/saa7164/saa7164-buffer.c
index 7a5c7d0..6f58af4 100644
--- a/drivers/media/video/saa7164/saa7164-buffer.c
+++ b/drivers/media/video/saa7164/saa7164-buffer.c
@@ -66,12 +66,33 @@
| etc
*/
+void saa7164_buffer_display(struct saa7164_buffer *buf)
+{
+ struct saa7164_dev *dev = buf->port->dev;
+ int i;
+
+ dprintk(DBGLVL_BUF, "%s() buffer @ 0x%p nr=%d\n",
+ __func__, buf, buf->idx);
+ dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%p len = 0x%x\n",
+ buf->cpu, (void *)buf->dma, buf->pci_size);
+ dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%p len = 0x%x\n",
+ buf->pt_cpu, (void *)buf->pt_dma, buf->pt_size);
+
+ /* Format the Page Table Entries to point into the data buffer */
+ for (i = 0 ; i < SAA7164_PT_ENTRIES; i++) {
+
+ dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
+ i, buf->pt_cpu, (u64)*(buf->pt_cpu));
+
+ }
+}
/* Allocate a new buffer structure and associated PCI space in bytes.
* len must be a multiple of sizeof(u64)
*/
-struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_tsport *port,
+struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_port *port,
u32 len)
{
+ tmHWStreamParameters_t *params = &port->hw_streamingparams;
struct saa7164_buffer *buf = 0;
struct saa7164_dev *dev = port->dev;
int i;
@@ -87,8 +108,11 @@
goto ret;
}
+ buf->idx = -1;
buf->port = port;
buf->flags = SAA7164_BUFFER_FREE;
+ buf->pos = 0;
+ buf->actual_size = params->pitch * params->numberoflines;
/* TODO: arg len is being ignored */
buf->pci_size = SAA7164_PT_ENTRIES * 0x1000;
buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000;
@@ -108,7 +132,8 @@
memset(buf->cpu, 0xff, buf->pci_size);
memset(buf->pt_cpu, 0xff, buf->pt_size);
- dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p\n", __func__, buf);
+ dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p\n",
+ __func__, buf);
dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08lx len = 0x%x\n",
buf->cpu, (long)buf->dma, buf->pci_size);
dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n",
@@ -133,26 +158,110 @@
return buf;
}
-int saa7164_buffer_dealloc(struct saa7164_tsport *port,
- struct saa7164_buffer *buf)
+int saa7164_buffer_dealloc(struct saa7164_buffer *buf)
{
struct saa7164_dev *dev;
- if (!buf || !port)
+ if (!buf || !buf->port)
return SAA_ERR_BAD_PARAMETER;
- dev = port->dev;
+ dev = buf->port->dev;
- dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n", __func__, buf);
+ dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n",
+ __func__, buf);
if (buf->flags != SAA7164_BUFFER_FREE)
log_warn(" freeing a non-free buffer\n");
- pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma);
- pci_free_consistent(port->dev->pci, buf->pt_size, buf->pt_cpu,
- buf->pt_dma);
+ pci_free_consistent(dev->pci, buf->pci_size, buf->cpu, buf->dma);
+ pci_free_consistent(dev->pci, buf->pt_size, buf->pt_cpu, buf->pt_dma);
kfree(buf);
return SAA_OK;
}
+/* Write a buffer into the hardware */
+int saa7164_buffer_activate(struct saa7164_buffer *buf, int i)
+{
+ struct saa7164_port *port = buf->port;
+ struct saa7164_dev *dev = port->dev;
+
+ if ((i < 0) || (i >= port->hwcfg.buffercount))
+ return -EINVAL;
+
+ dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
+
+ buf->idx = i; /* Note of which buffer list index position we occupy */
+ buf->flags = SAA7164_BUFFER_BUSY;
+ buf->pos = 0;
+
+ /* TODO: Review this in light of 32v64 assignments */
+ saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
+ saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma);
+ saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);
+
+ dprintk(DBGLVL_BUF, " buf[%d] offset 0x%llx (0x%x) "
+ "buf 0x%llx/%llx (0x%x/%x) nr=%d\n",
+ buf->idx,
+ (u64)port->bufoffset + (i * sizeof(u32)),
+ saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
+ (u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
+ (u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
+ saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)),
+ saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)),
+ buf->idx);
+
+ return 0;
+}
+
+int saa7164_buffer_cfg_port(struct saa7164_port *port)
+{
+ tmHWStreamParameters_t *params = &port->hw_streamingparams;
+ struct saa7164_dev *dev = port->dev;
+ struct saa7164_buffer *buf;
+ struct list_head *c, *n;
+ int i = 0;
+
+ dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr);
+
+ saa7164_writel(port->bufcounter, 0);
+ saa7164_writel(port->pitch, params->pitch);
+ saa7164_writel(port->bufsize, params->pitch * params->numberoflines);
+
+ dprintk(DBGLVL_BUF, " configured:\n");
+ dprintk(DBGLVL_BUF, " lmmio 0x%p\n", dev->lmmio);
+ dprintk(DBGLVL_BUF, " bufcounter 0x%x = 0x%x\n", port->bufcounter,
+ saa7164_readl(port->bufcounter));
+
+ dprintk(DBGLVL_BUF, " pitch 0x%x = %d\n", port->pitch,
+ saa7164_readl(port->pitch));
+
+ dprintk(DBGLVL_BUF, " bufsize 0x%x = %d\n", port->bufsize,
+ saa7164_readl(port->bufsize));
+
+ dprintk(DBGLVL_BUF, " buffercount = %d\n", port->hwcfg.buffercount);
+ dprintk(DBGLVL_BUF, " bufoffset = 0x%x\n", port->bufoffset);
+ dprintk(DBGLVL_BUF, " bufptr32h = 0x%x\n", port->bufptr32h);
+ dprintk(DBGLVL_BUF, " bufptr32l = 0x%x\n", port->bufptr32l);
+
+ /* Poke the buffers and offsets into PCI space */
+ mutex_lock(&port->dmaqueue_lock);
+ list_for_each_safe(c, n, &port->dmaqueue.list) {
+ buf = list_entry(c, struct saa7164_buffer, list);
+
+ if (buf->flags != SAA7164_BUFFER_FREE)
+ BUG();
+
+ /* Place the buffer in the h/w queue */
+ saa7164_buffer_activate(buf, i);
+
+ /* Don't exceed the device maximum # bufs */
+ if (i++ > port->hwcfg.buffercount)
+ BUG();
+
+ }
+ mutex_unlock(&port->dmaqueue_lock);
+
+ return 0;
+}
+
diff --git a/drivers/media/video/saa7164/saa7164-core.c b/drivers/media/video/saa7164/saa7164-core.c
index 1bd1e62..88c36bd 100644
--- a/drivers/media/video/saa7164/saa7164-core.c
+++ b/drivers/media/video/saa7164/saa7164-core.c
@@ -74,7 +74,7 @@
static void saa7164_buffer_deliver(struct saa7164_buffer *buf)
{
- struct saa7164_tsport *port = buf->port;
+ struct saa7164_port *port = buf->port;
/* Feed the transport payload into the kernel demux */
dvb_dmx_swfilter_packets(&port->dvb.demux, (u8 *)buf->cpu,
@@ -82,7 +82,7 @@
}
-static irqreturn_t saa7164_irq_ts(struct saa7164_tsport *port)
+static irqreturn_t saa7164_irq_ts(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
struct saa7164_buffer *buf;
@@ -107,7 +107,7 @@
if (i++ > port->hwcfg.buffercount)
BUG();
- if (buf->nr == rp) {
+ if (buf->idx == rp) {
/* Found the buffer, deal with it */
dprintk(DBGLVL_IRQ, "%s() wp: %d processing: %d\n",
__func__, wp, rp);
@@ -446,20 +446,18 @@
/* Transport port A Defaults / setup */
dev->ts1.dev = dev;
dev->ts1.nr = 0;
+ dev->ts1.type = SAA7164_MPEG_UNDEFINED;
mutex_init(&dev->ts1.dvb.lock);
INIT_LIST_HEAD(&dev->ts1.dmaqueue.list);
- INIT_LIST_HEAD(&dev->ts1.dummy_dmaqueue.list);
mutex_init(&dev->ts1.dmaqueue_lock);
- mutex_init(&dev->ts1.dummy_dmaqueue_lock);
/* Transport port B Defaults / setup */
dev->ts2.dev = dev;
dev->ts2.nr = 1;
+ dev->ts2.type = SAA7164_MPEG_UNDEFINED;
mutex_init(&dev->ts2.dvb.lock);
INIT_LIST_HEAD(&dev->ts2.dmaqueue.list);
- INIT_LIST_HEAD(&dev->ts2.dummy_dmaqueue.list);
mutex_init(&dev->ts2.dmaqueue_lock);
- mutex_init(&dev->ts2.dummy_dmaqueue_lock);
if (get_resources(dev) < 0) {
printk(KERN_ERR "CORE %s No more PCIe resources for "
diff --git a/drivers/media/video/saa7164/saa7164-dvb.c b/drivers/media/video/saa7164/saa7164-dvb.c
index 4bae745..ffa1c97 100644
--- a/drivers/media/video/saa7164/saa7164-dvb.c
+++ b/drivers/media/video/saa7164/saa7164-dvb.c
@@ -82,7 +82,7 @@
.mpeg_timing = S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
};
-static int saa7164_dvb_stop_tsport(struct saa7164_tsport *port)
+static int saa7164_dvb_stop_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
@@ -100,7 +100,7 @@
return ret;
}
-static int saa7164_dvb_acquire_tsport(struct saa7164_tsport *port)
+static int saa7164_dvb_acquire_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
@@ -118,7 +118,7 @@
return ret;
}
-static int saa7164_dvb_pause_tsport(struct saa7164_tsport *port)
+static int saa7164_dvb_pause_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
@@ -140,90 +140,28 @@
* the part through AVStream / KS Windows stages, forwards or backwards.
* States are: stopped, acquired (h/w), paused, started.
*/
-static int saa7164_dvb_stop_streaming(struct saa7164_tsport *port)
+static int saa7164_dvb_stop_streaming(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
dprintk(DBGLVL_DVB, "%s(port=%d)\n", __func__, port->nr);
- ret = saa7164_dvb_pause_tsport(port);
- ret = saa7164_dvb_acquire_tsport(port);
- ret = saa7164_dvb_stop_tsport(port);
+ ret = saa7164_dvb_pause_port(port);
+ ret = saa7164_dvb_acquire_port(port);
+ ret = saa7164_dvb_stop_port(port);
return ret;
}
-static int saa7164_dvb_cfg_tsport(struct saa7164_tsport *port)
-{
- tmHWStreamParameters_t *params = &port->hw_streamingparams;
- struct saa7164_dev *dev = port->dev;
- struct saa7164_buffer *buf;
- struct list_head *c, *n;
- int i = 0;
-
- dprintk(DBGLVL_DVB, "%s(port=%d)\n", __func__, port->nr);
-
- saa7164_writel(port->pitch, params->pitch);
- saa7164_writel(port->bufsize, params->pitch * params->numberoflines);
-
- dprintk(DBGLVL_DVB, " configured:\n");
- dprintk(DBGLVL_DVB, " lmmio 0x%p\n", dev->lmmio);
- dprintk(DBGLVL_DVB, " bufcounter 0x%x = 0x%x\n", port->bufcounter,
- saa7164_readl(port->bufcounter));
-
- dprintk(DBGLVL_DVB, " pitch 0x%x = %d\n", port->pitch,
- saa7164_readl(port->pitch));
-
- dprintk(DBGLVL_DVB, " bufsize 0x%x = %d\n", port->bufsize,
- saa7164_readl(port->bufsize));
-
- dprintk(DBGLVL_DVB, " buffercount = %d\n", port->hwcfg.buffercount);
- dprintk(DBGLVL_DVB, " bufoffset = 0x%x\n", port->bufoffset);
- dprintk(DBGLVL_DVB, " bufptr32h = 0x%x\n", port->bufptr32h);
- dprintk(DBGLVL_DVB, " bufptr32l = 0x%x\n", port->bufptr32l);
-
- /* Poke the buffers and offsets into PCI space */
- mutex_lock(&port->dmaqueue_lock);
- list_for_each_safe(c, n, &port->dmaqueue.list) {
- buf = list_entry(c, struct saa7164_buffer, list);
-
- /* TODO: Review this in light of 32v64 assignments */
- saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
- saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i),
- buf->pt_dma);
- saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);
-
- dprintk(DBGLVL_DVB,
- " buf[%d] offset 0x%llx (0x%x) "
- "buf 0x%llx/%llx (0x%x/%x)\n",
- i,
- (u64)port->bufoffset + (i * sizeof(u32)),
- saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
- (u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
- (u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
- saa7164_readl(port->bufptr32h + ((sizeof(u32) * i)
- * 2)),
- saa7164_readl(port->bufptr32l + ((sizeof(u32) * i)
- * 2)));
-
- if (i++ > port->hwcfg.buffercount)
- BUG();
-
- }
- mutex_unlock(&port->dmaqueue_lock);
-
- return 0;
-}
-
-static int saa7164_dvb_start_tsport(struct saa7164_tsport *port)
+static int saa7164_dvb_start_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret = 0, result;
dprintk(DBGLVL_DVB, "%s(port=%d)\n", __func__, port->nr);
- saa7164_dvb_cfg_tsport(port);
+ saa7164_buffer_cfg_port(port);
/* Acquire the hardware */
result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
@@ -284,7 +222,7 @@
static int saa7164_dvb_start_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
- struct saa7164_tsport *port = (struct saa7164_tsport *) demux->priv;
+ struct saa7164_port *port = (struct saa7164_port *) demux->priv;
struct saa7164_dvb *dvb = &port->dvb;
struct saa7164_dev *dev = port->dev;
int ret = 0;
@@ -298,7 +236,7 @@
mutex_lock(&dvb->lock);
if (dvb->feeding++ == 0) {
/* Start transport */
- ret = saa7164_dvb_start_tsport(port);
+ ret = saa7164_dvb_start_port(port);
}
mutex_unlock(&dvb->lock);
dprintk(DBGLVL_DVB, "%s(port=%d) now feeding = %d\n",
@@ -311,7 +249,7 @@
static int saa7164_dvb_stop_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
- struct saa7164_tsport *port = (struct saa7164_tsport *) demux->priv;
+ struct saa7164_port *port = (struct saa7164_port *) demux->priv;
struct saa7164_dvb *dvb = &port->dvb;
struct saa7164_dev *dev = port->dev;
int ret = 0;
@@ -332,7 +270,7 @@
return ret;
}
-static int dvb_register(struct saa7164_tsport *port)
+static int dvb_register(struct saa7164_port *port)
{
struct saa7164_dvb *dvb = &port->dvb;
struct saa7164_dev *dev = port->dev;
@@ -341,6 +279,9 @@
dprintk(DBGLVL_DVB, "%s(port=%d)\n", __func__, port->nr);
+ if (port->type != SAA7164_MPEG_DVB)
+ BUG();
+
/* Sanity check that the PCI configuration space is active */
if (port->hwcfg.BARLocation == 0) {
result = -ENOMEM;
@@ -378,7 +319,6 @@
DRIVER_NAME, result);
goto fail_adapter;
}
- buf->nr = i;
mutex_lock(&port->dmaqueue_lock);
list_add_tail(&buf->list, &port->dmaqueue.list);
@@ -473,7 +413,7 @@
return result;
}
-int saa7164_dvb_unregister(struct saa7164_tsport *port)
+int saa7164_dvb_unregister(struct saa7164_port *port)
{
struct saa7164_dvb *dvb = &port->dvb;
struct saa7164_dev *dev = port->dev;
@@ -482,12 +422,15 @@
dprintk(DBGLVL_DVB, "%s()\n", __func__);
+ if (port->type != SAA7164_MPEG_DVB)
+ BUG();
+
/* Remove any allocated buffers */
mutex_lock(&port->dmaqueue_lock);
list_for_each_safe(c, n, &port->dmaqueue.list) {
b = list_entry(c, struct saa7164_buffer, list);
list_del(c);
- saa7164_buffer_dealloc(port, b);
+ saa7164_buffer_dealloc(b);
}
mutex_unlock(&port->dmaqueue_lock);
@@ -508,7 +451,7 @@
/* All the DVB attach calls go here, this function get's modified
* for each new card.
*/
-int saa7164_dvb_register(struct saa7164_tsport *port)
+int saa7164_dvb_register(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
struct saa7164_dvb *dvb = &port->dvb;
diff --git a/drivers/media/video/saa7164/saa7164.h b/drivers/media/video/saa7164/saa7164.h
index c4c62b0..1ca9bf2 100644
--- a/drivers/media/video/saa7164/saa7164.h
+++ b/drivers/media/video/saa7164/saa7164.h
@@ -91,6 +91,7 @@
enum port_t {
SAA7164_MPEG_UNDEFINED = 0,
SAA7164_MPEG_DVB,
+ SAA7164_MPEG_ENCODER,
};
enum saa7164_i2c_bus_nr {
@@ -192,14 +193,15 @@
u32 i2c_rc;
};
-struct saa7164_tsport;
+struct saa7164_port;
struct saa7164_buffer {
struct list_head list;
- u32 nr;
+ /* Note of which h/w buffer list index position we occupy */
+ int idx;
- struct saa7164_tsport *port;
+ struct saa7164_port *port;
/* Hardware Specific */
/* PCI Memory allocations */
@@ -214,17 +216,21 @@
u32 pt_size; /* PCI allocation size in bytes */
u64 *pt_cpu; /* Virtual address */
dma_addr_t pt_dma; /* Physical address */
+
+ /* Encoder fops */
+ u32 pos;
+ u32 actual_size;
};
-struct saa7164_tsport {
+struct saa7164_port {
struct saa7164_dev *dev;
- int nr;
enum port_t type;
+ int nr;
- struct saa7164_dvb dvb;
+ /* --- Generic port attributes --- */
- /* HW related stream parameters */
+ /* HW stream parameters */
tmHWStreamParameters_t hw_streamingparams;
/* DMA configuration values, is seeded during initialization */
@@ -240,10 +246,14 @@
u64 bufptr64;
u32 numpte; /* Number of entries in array, only valid in head */
+
struct mutex dmaqueue_lock;
- struct mutex dummy_dmaqueue_lock;
struct saa7164_buffer dmaqueue;
- struct saa7164_buffer dummy_dmaqueue;
+
+ /* --- DVB Transport Specific --- */
+ struct saa7164_dvb dvb;
+
+ /* --- Encoder/V4L related attributes --- */
};
@@ -287,7 +297,7 @@
struct saa7164_i2c i2c_bus[3];
/* Transport related */
- struct saa7164_tsport ts1, ts2;
+ struct saa7164_port ts1, ts2;
/* Deferred command/api interrupts handling */
struct work_struct workcmd;
@@ -344,7 +354,7 @@
int saa7164_api_read_eeprom(struct saa7164_dev *dev, u8 *buf, int buflen);
int saa7164_api_set_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
int saa7164_api_clear_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
-int saa7164_api_transition_port(struct saa7164_tsport *port, u8 mode);
+int saa7164_api_transition_port(struct saa7164_port *port, u8 mode);
/* ----------------------------------------------------------- */
/* saa7164-cards.c */
@@ -364,15 +374,17 @@
/* ----------------------------------------------------------- */
/* saa7164-dvb.c */
-extern int saa7164_dvb_register(struct saa7164_tsport *port);
-extern int saa7164_dvb_unregister(struct saa7164_tsport *port);
+extern int saa7164_dvb_register(struct saa7164_port *port);
+extern int saa7164_dvb_unregister(struct saa7164_port *port);
/* ----------------------------------------------------------- */
/* saa7164-buffer.c */
-extern struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_tsport *port,
- u32 len);
-extern int saa7164_buffer_dealloc(struct saa7164_tsport *port,
- struct saa7164_buffer *buf);
+extern struct saa7164_buffer *saa7164_buffer_alloc(
+ struct saa7164_port *port, u32 len);
+extern int saa7164_buffer_dealloc(struct saa7164_buffer *buf);
+extern void saa7164_buffer_display(struct saa7164_buffer *buf);
+extern int saa7164_buffer_activate(struct saa7164_buffer *buf, int i);
+extern int saa7164_buffer_cfg_port(struct saa7164_port *port);
/* ----------------------------------------------------------- */
