aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/au1000/common/dbdma.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/au1000/common/dbdma.c')
-rw-r--r--arch/mips/au1000/common/dbdma.c389
1 files changed, 184 insertions, 205 deletions
diff --git a/arch/mips/au1000/common/dbdma.c b/arch/mips/au1000/common/dbdma.c
index 53377dfc064..42d555236de 100644
--- a/arch/mips/au1000/common/dbdma.c
+++ b/arch/mips/au1000/common/dbdma.c
@@ -53,12 +53,11 @@
*/
static DEFINE_SPINLOCK(au1xxx_dbdma_spin_lock);
-/* I couldn't find a macro that did this......
-*/
+/* I couldn't find a macro that did this... */
#define ALIGN_ADDR(x, a) ((((u32)(x)) + (a-1)) & ~(a-1))
static dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE;
-static int dbdma_initialized=0;
+static int dbdma_initialized;
static void au1xxx_dbdma_init(void);
static dbdev_tab_t dbdev_tab[] = {
@@ -149,7 +148,7 @@ static dbdev_tab_t dbdev_tab[] = {
{ DSCR_CMD0_NAND_FLASH, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
-#endif // CONFIG_SOC_AU1200
+#endif /* CONFIG_SOC_AU1200 */
{ DSCR_CMD0_THROTTLE, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
{ DSCR_CMD0_ALWAYS, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
@@ -177,8 +176,7 @@ static dbdev_tab_t dbdev_tab[] = {
static chan_tab_t *chan_tab_ptr[NUM_DBDMA_CHANS];
-static dbdev_tab_t *
-find_dbdev_id(u32 id)
+static dbdev_tab_t *find_dbdev_id(u32 id)
{
int i;
dbdev_tab_t *p;
@@ -190,29 +188,27 @@ find_dbdev_id(u32 id)
return NULL;
}
-void * au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp)
+void *au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp)
{
- return phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
+ return phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
}
EXPORT_SYMBOL(au1xxx_ddma_get_nextptr_virt);
-u32
-au1xxx_ddma_add_device(dbdev_tab_t *dev)
+u32 au1xxx_ddma_add_device(dbdev_tab_t *dev)
{
u32 ret = 0;
- dbdev_tab_t *p=NULL;
- static u16 new_id=0x1000;
+ dbdev_tab_t *p;
+ static u16 new_id = 0x1000;
p = find_dbdev_id(~0);
- if ( NULL != p )
- {
+ if (NULL != p) {
memcpy(p, dev, sizeof(dbdev_tab_t));
p->dev_id = DSCR_DEV2CUSTOM_ID(new_id, dev->dev_id);
ret = p->dev_id;
new_id++;
#if 0
- printk("add_device: id:%x flags:%x padd:%x\n",
- p->dev_id, p->dev_flags, p->dev_physaddr );
+ printk(KERN_DEBUG "add_device: id:%x flags:%x padd:%x\n",
+ p->dev_id, p->dev_flags, p->dev_physaddr);
#endif
}
@@ -220,10 +216,8 @@ au1xxx_ddma_add_device(dbdev_tab_t *dev)
}
EXPORT_SYMBOL(au1xxx_ddma_add_device);
-/* Allocate a channel and return a non-zero descriptor if successful.
-*/
-u32
-au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
+/* Allocate a channel and return a non-zero descriptor if successful. */
+u32 au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
void (*callback)(int, void *), void *callparam)
{
unsigned long flags;
@@ -234,7 +228,8 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
chan_tab_t *ctp;
au1x_dma_chan_t *cp;
- /* We do the intialization on the first channel allocation.
+ /*
+ * We do the intialization on the first channel allocation.
* We have to wait because of the interrupt handler initialization
* which can't be done successfully during board set up.
*/
@@ -242,16 +237,17 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
au1xxx_dbdma_init();
dbdma_initialized = 1;
- if ((stp = find_dbdev_id(srcid)) == NULL)
+ stp = find_dbdev_id(srcid);
+ if (stp == NULL)
return 0;
- if ((dtp = find_dbdev_id(destid)) == NULL)
+ dtp = find_dbdev_id(destid);
+ if (dtp == NULL)
return 0;
used = 0;
rv = 0;
- /* Check to see if we can get both channels.
- */
+ /* Check to see if we can get both channels. */
spin_lock_irqsave(&au1xxx_dbdma_spin_lock, flags);
if (!(stp->dev_flags & DEV_FLAGS_INUSE) ||
(stp->dev_flags & DEV_FLAGS_ANYUSE)) {
@@ -261,35 +257,30 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
(dtp->dev_flags & DEV_FLAGS_ANYUSE)) {
/* Got destination */
dtp->dev_flags |= DEV_FLAGS_INUSE;
- }
- else {
- /* Can't get dest. Release src.
- */
+ } else {
+ /* Can't get dest. Release src. */
stp->dev_flags &= ~DEV_FLAGS_INUSE;
used++;
}
- }
- else {
+ } else
used++;
- }
spin_unlock_irqrestore(&au1xxx_dbdma_spin_lock, flags);
if (!used) {
- /* Let's see if we can allocate a channel for it.
- */
+ /* Let's see if we can allocate a channel for it. */
ctp = NULL;
chan = 0;
spin_lock_irqsave(&au1xxx_dbdma_spin_lock, flags);
- for (i=0; i<NUM_DBDMA_CHANS; i++) {
+ for (i = 0; i < NUM_DBDMA_CHANS; i++)
if (chan_tab_ptr[i] == NULL) {
- /* If kmalloc fails, it is caught below same
+ /*
+ * If kmalloc fails, it is caught below same
* as a channel not available.
*/
ctp = kmalloc(sizeof(chan_tab_t), GFP_ATOMIC);
chan_tab_ptr[i] = ctp;
break;
}
- }
spin_unlock_irqrestore(&au1xxx_dbdma_spin_lock, flags);
if (ctp != NULL) {
@@ -304,8 +295,7 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
ctp->chan_callback = callback;
ctp->chan_callparam = callparam;
- /* Initialize channel configuration.
- */
+ /* Initialize channel configuration. */
i = 0;
if (stp->dev_intlevel)
i |= DDMA_CFG_SED;
@@ -326,8 +316,7 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
* operations.
*/
rv = (u32)(&chan_tab_ptr[chan]);
- }
- else {
+ } else {
/* Release devices */
stp->dev_flags &= ~DEV_FLAGS_INUSE;
dtp->dev_flags &= ~DEV_FLAGS_INUSE;
@@ -337,11 +326,11 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
}
EXPORT_SYMBOL(au1xxx_dbdma_chan_alloc);
-/* Set the device width if source or destination is a FIFO.
+/*
+ * Set the device width if source or destination is a FIFO.
* Should be 8, 16, or 32 bits.
*/
-u32
-au1xxx_dbdma_set_devwidth(u32 chanid, int bits)
+u32 au1xxx_dbdma_set_devwidth(u32 chanid, int bits)
{
u32 rv;
chan_tab_t *ctp;
@@ -365,10 +354,8 @@ au1xxx_dbdma_set_devwidth(u32 chanid, int bits)
}
EXPORT_SYMBOL(au1xxx_dbdma_set_devwidth);
-/* Allocate a descriptor ring, initializing as much as possible.
-*/
-u32
-au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
+/* Allocate a descriptor ring, initializing as much as possible. */
+u32 au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
{
int i;
u32 desc_base, srcid, destid;
@@ -378,43 +365,45 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
dbdev_tab_t *stp, *dtp;
au1x_ddma_desc_t *dp;
- /* I guess we could check this to be within the
+ /*
+ * I guess we could check this to be within the
* range of the table......
*/
ctp = *((chan_tab_t **)chanid);
stp = ctp->chan_src;
dtp = ctp->chan_dest;
- /* The descriptors must be 32-byte aligned. There is a
+ /*
+ * The descriptors must be 32-byte aligned. There is a
* possibility the allocation will give us such an address,
* and if we try that first we are likely to not waste larger
* slabs of memory.
*/
desc_base = (u32)kmalloc(entries * sizeof(au1x_ddma_desc_t),
- GFP_KERNEL|GFP_DMA);
+ GFP_KERNEL|GFP_DMA);
if (desc_base == 0)
return 0;
if (desc_base & 0x1f) {
- /* Lost....do it again, allocate extra, and round
+ /*
+ * Lost....do it again, allocate extra, and round
* the address base.
*/
kfree((const void *)desc_base);
i = entries * sizeof(au1x_ddma_desc_t);
i += (sizeof(au1x_ddma_desc_t) - 1);
- if ((desc_base = (u32)kmalloc(i, GFP_KERNEL|GFP_DMA)) == 0)
+ desc_base = (u32)kmalloc(i, GFP_KERNEL|GFP_DMA);
+ if (desc_base == 0)
return 0;
desc_base = ALIGN_ADDR(desc_base, sizeof(au1x_ddma_desc_t));
}
dp = (au1x_ddma_desc_t *)desc_base;
- /* Keep track of the base descriptor.
- */
+ /* Keep track of the base descriptor. */
ctp->chan_desc_base = dp;
- /* Initialize the rings with as much information as we know.
- */
+ /* Initialize the rings with as much information as we know. */
srcid = stp->dev_id;
destid = dtp->dev_id;
@@ -426,11 +415,12 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
cmd0 |= DSCR_CMD0_IE | DSCR_CMD0_CV;
cmd0 |= DSCR_CMD0_ST(DSCR_CMD0_ST_NOCHANGE);
- /* is it mem to mem transfer? */
- if(((DSCR_CUSTOM2DEV_ID(srcid) == DSCR_CMD0_THROTTLE) || (DSCR_CUSTOM2DEV_ID(srcid) == DSCR_CMD0_ALWAYS)) &&
- ((DSCR_CUSTOM2DEV_ID(destid) == DSCR_CMD0_THROTTLE) || (DSCR_CUSTOM2DEV_ID(destid) == DSCR_CMD0_ALWAYS))) {
- cmd0 |= DSCR_CMD0_MEM;
- }
+ /* Is it mem to mem transfer? */
+ if (((DSCR_CUSTOM2DEV_ID(srcid) == DSCR_CMD0_THROTTLE) ||
+ (DSCR_CUSTOM2DEV_ID(srcid) == DSCR_CMD0_ALWAYS)) &&
+ ((DSCR_CUSTOM2DEV_ID(destid) == DSCR_CMD0_THROTTLE) ||
+ (DSCR_CUSTOM2DEV_ID(destid) == DSCR_CMD0_ALWAYS)))
+ cmd0 |= DSCR_CMD0_MEM;
switch (stp->dev_devwidth) {
case 8:
@@ -458,15 +448,17 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
break;
}
- /* If the device is marked as an in/out FIFO, ensure it is
+ /*
+ * If the device is marked as an in/out FIFO, ensure it is
* set non-coherent.
*/
if (stp->dev_flags & DEV_FLAGS_IN)
- cmd0 |= DSCR_CMD0_SN; /* Source in fifo */
+ cmd0 |= DSCR_CMD0_SN; /* Source in FIFO */
if (dtp->dev_flags & DEV_FLAGS_OUT)
- cmd0 |= DSCR_CMD0_DN; /* Destination out fifo */
+ cmd0 |= DSCR_CMD0_DN; /* Destination out FIFO */
- /* Set up source1. For now, assume no stride and increment.
+ /*
+ * Set up source1. For now, assume no stride and increment.
* A channel attribute update can change this later.
*/
switch (stp->dev_tsize) {
@@ -485,19 +477,19 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
break;
}
- /* If source input is fifo, set static address.
- */
+ /* If source input is FIFO, set static address. */
if (stp->dev_flags & DEV_FLAGS_IN) {
- if ( stp->dev_flags & DEV_FLAGS_BURSTABLE )
+ if (stp->dev_flags & DEV_FLAGS_BURSTABLE)
src1 |= DSCR_SRC1_SAM(DSCR_xAM_BURST);
else
- src1 |= DSCR_SRC1_SAM(DSCR_xAM_STATIC);
-
+ src1 |= DSCR_SRC1_SAM(DSCR_xAM_STATIC);
}
+
if (stp->dev_physaddr)
src0 = stp->dev_physaddr;
- /* Set up dest1. For now, assume no stride and increment.
+ /*
+ * Set up dest1. For now, assume no stride and increment.
* A channel attribute update can change this later.
*/
switch (dtp->dev_tsize) {
@@ -516,22 +508,24 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
break;
}
- /* If destination output is fifo, set static address.
- */
+ /* If destination output is FIFO, set static address. */
if (dtp->dev_flags & DEV_FLAGS_OUT) {
- if ( dtp->dev_flags & DEV_FLAGS_BURSTABLE )
- dest1 |= DSCR_DEST1_DAM(DSCR_xAM_BURST);
- else
- dest1 |= DSCR_DEST1_DAM(DSCR_xAM_STATIC);
+ if (dtp->dev_flags & DEV_FLAGS_BURSTABLE)
+ dest1 |= DSCR_DEST1_DAM(DSCR_xAM_BURST);
+ else
+ dest1 |= DSCR_DEST1_DAM(DSCR_xAM_STATIC);
}
+
if (dtp->dev_physaddr)
dest0 = dtp->dev_physaddr;
#if 0
- printk("did:%x sid:%x cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
- dtp->dev_id, stp->dev_id, cmd0, cmd1, src0, src1, dest0, dest1 );
+ printk(KERN_DEBUG "did:%x sid:%x cmd0:%x cmd1:%x source0:%x "
+ "source1:%x dest0:%x dest1:%x\n",
+ dtp->dev_id, stp->dev_id, cmd0, cmd1, src0,
+ src1, dest0, dest1);
#endif
- for (i=0; i<entries; i++) {
+ for (i = 0; i < entries; i++) {
dp->dscr_cmd0 = cmd0;
dp->dscr_cmd1 = cmd1;
dp->dscr_source0 = src0;
@@ -545,49 +539,49 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
dp++;
}
- /* Make last descrptor point to the first.
- */
+ /* Make last descrptor point to the first. */
dp--;
dp->dscr_nxtptr = DSCR_NXTPTR(virt_to_phys(ctp->chan_desc_base));
ctp->get_ptr = ctp->put_ptr = ctp->cur_ptr = ctp->chan_desc_base;
- return (u32)(ctp->chan_desc_base);
+ return (u32)ctp->chan_desc_base;
}
EXPORT_SYMBOL(au1xxx_dbdma_ring_alloc);
-/* Put a source buffer into the DMA ring.
+/*
+ * Put a source buffer into the DMA ring.
* This updates the source pointer and byte count. Normally used
* for memory to fifo transfers.
*/
-u32
-_au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
+u32 _au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
{
chan_tab_t *ctp;
au1x_ddma_desc_t *dp;
- /* I guess we could check this to be within the
+ /*
+ * I guess we could check this to be within the
* range of the table......
*/
- ctp = *((chan_tab_t **)chanid);
+ ctp = *(chan_tab_t **)chanid;
- /* We should have multiple callers for a particular channel,
+ /*
+ * We should have multiple callers for a particular channel,
* an interrupt doesn't affect this pointer nor the descriptor,
* so no locking should be needed.
*/
dp = ctp->put_ptr;
- /* If the descriptor is valid, we are way ahead of the DMA
+ /*
+ * If the descriptor is valid, we are way ahead of the DMA
* engine, so just return an error condition.
*/
- if (dp->dscr_cmd0 & DSCR_CMD0_V) {
+ if (dp->dscr_cmd0 & DSCR_CMD0_V)
return 0;
- }
- /* Load up buffer address and byte count.
- */
+ /* Load up buffer address and byte count. */
dp->dscr_source0 = virt_to_phys(buf);
dp->dscr_cmd1 = nbytes;
- /* Check flags */
+ /* Check flags */
if (flags & DDMA_FLAGS_IE)
dp->dscr_cmd0 |= DSCR_CMD0_IE;
if (flags & DDMA_FLAGS_NOIE)
@@ -595,23 +589,21 @@ _au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
/*
* There is an errata on the Au1200/Au1550 parts that could result
- * in "stale" data being DMA'd. It has to do with the snoop logic on
- * the dache eviction buffer. NONCOHERENT_IO is on by default for
- * these parts. If it is fixedin the future, these dma_cache_inv will
+ * in "stale" data being DMA'ed. It has to do with the snoop logic on
+ * the cache eviction buffer. DMA_NONCOHERENT is on by default for
+ * these parts. If it is fixed in the future, these dma_cache_inv will
* just be nothing more than empty macros. See io.h.
- * */
+ */
dma_cache_wback_inv((unsigned long)buf, nbytes);
- dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
+ dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
au_sync();
dma_cache_wback_inv((unsigned long)dp, sizeof(dp));
- ctp->chan_ptr->ddma_dbell = 0;
+ ctp->chan_ptr->ddma_dbell = 0;
- /* Get next descriptor pointer.
- */
+ /* Get next descriptor pointer. */
ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
- /* return something not zero.
- */
+ /* Return something non-zero. */
return nbytes;
}
EXPORT_SYMBOL(_au1xxx_dbdma_put_source);
@@ -654,81 +646,77 @@ _au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes, u32 flags)
dp->dscr_dest0 = virt_to_phys(buf);
dp->dscr_cmd1 = nbytes;
#if 0
- printk("cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
- dp->dscr_cmd0, dp->dscr_cmd1, dp->dscr_source0,
- dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1 );
+ printk(KERN_DEBUG "cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
+ dp->dscr_cmd0, dp->dscr_cmd1, dp->dscr_source0,
+ dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1);
#endif
/*
* There is an errata on the Au1200/Au1550 parts that could result in
- * "stale" data being DMA'd. It has to do with the snoop logic on the
- * dache eviction buffer. NONCOHERENT_IO is on by default for these
- * parts. If it is fixedin the future, these dma_cache_inv will just
+ * "stale" data being DMA'ed. It has to do with the snoop logic on the
+ * cache eviction buffer. DMA_NONCOHERENT is on by default for these
+ * parts. If it is fixed in the future, these dma_cache_inv will just
* be nothing more than empty macros. See io.h.
- * */
+ */
dma_cache_inv((unsigned long)buf, nbytes);
dp->dscr_cmd0 |= DSCR_CMD0_V; /* Let it rip */
au_sync();
dma_cache_wback_inv((unsigned long)dp, sizeof(dp));
- ctp->chan_ptr->ddma_dbell = 0;
+ ctp->chan_ptr->ddma_dbell = 0;
- /* Get next descriptor pointer.
- */
+ /* Get next descriptor pointer. */
ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
- /* return something not zero.
- */
+ /* Return something non-zero. */
return nbytes;
}
EXPORT_SYMBOL(_au1xxx_dbdma_put_dest);
-/* Get a destination buffer into the DMA ring.
+/*
+ * Get a destination buffer into the DMA ring.
* Normally used to get a full buffer from the ring during fifo
* to memory transfers. This does not set the valid bit, you will
* have to put another destination buffer to keep the DMA going.
*/
-u32
-au1xxx_dbdma_get_dest(u32 chanid, void **buf, int *nbytes)
+u32 au1xxx_dbdma_get_dest(u32 chanid, void **buf, int *nbytes)
{
chan_tab_t *ctp;
au1x_ddma_desc_t *dp;
u32 rv;
- /* I guess we could check this to be within the
+ /*
+ * I guess we could check this to be within the
* range of the table......
*/
ctp = *((chan_tab_t **)chanid);
- /* We should have multiple callers for a particular channel,
+ /*
+ * We should have multiple callers for a particular channel,
* an interrupt doesn't affect this pointer nor the descriptor,
* so no locking should be needed.
*/
dp = ctp->get_ptr;
- /* If the descriptor is valid, we are way ahead of the DMA
+ /*
+ * If the descriptor is valid, we are way ahead of the DMA
* engine, so just return an error condition.
*/
if (dp->dscr_cmd0 & DSCR_CMD0_V)
return 0;
- /* Return buffer address and byte count.
- */
+ /* Return buffer address and byte count. */
*buf = (void *)(phys_to_virt(dp->dscr_dest0));
*nbytes = dp->dscr_cmd1;
rv = dp->dscr_stat;
- /* Get next descriptor pointer.
- */
+ /* Get next descriptor pointer. */
ctp->get_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
- /* return something not zero.
- */
+ /* Return something non-zero. */
return rv;
}
-
EXPORT_SYMBOL_GPL(au1xxx_dbdma_get_dest);
-void
-au1xxx_dbdma_stop(u32 chanid)
+void au1xxx_dbdma_stop(u32 chanid)
{
chan_tab_t *ctp;
au1x_dma_chan_t *cp;
@@ -743,7 +731,7 @@ au1xxx_dbdma_stop(u32 chanid)
udelay(1);
halt_timeout++;
if (halt_timeout > 100) {
- printk("warning: DMA channel won't halt\n");
+ printk(KERN_WARNING "warning: DMA channel won't halt\n");
break;
}
}
@@ -753,12 +741,12 @@ au1xxx_dbdma_stop(u32 chanid)
}
EXPORT_SYMBOL(au1xxx_dbdma_stop);
-/* Start using the current descriptor pointer. If the dbdma encounters
- * a not valid descriptor, it will stop. In this case, we can just
+/*
+ * Start using the current descriptor pointer. If the DBDMA encounters
+ * a non-valid descriptor, it will stop. In this case, we can just
* continue by adding a buffer to the list and starting again.
*/
-void
-au1xxx_dbdma_start(u32 chanid)
+void au1xxx_dbdma_start(u32 chanid)
{
chan_tab_t *ctp;
au1x_dma_chan_t *cp;
@@ -773,8 +761,7 @@ au1xxx_dbdma_start(u32 chanid)
}
EXPORT_SYMBOL(au1xxx_dbdma_start);
-void
-au1xxx_dbdma_reset(u32 chanid)
+void au1xxx_dbdma_reset(u32 chanid)
{
chan_tab_t *ctp;
au1x_ddma_desc_t *dp;
@@ -784,14 +771,14 @@ au1xxx_dbdma_reset(u32 chanid)
ctp = *((chan_tab_t **)chanid);
ctp->get_ptr = ctp->put_ptr = ctp->cur_ptr = ctp->chan_desc_base;
- /* Run through the descriptors and reset the valid indicator.
- */
+ /* Run through the descriptors and reset the valid indicator. */
dp = ctp->chan_desc_base;
do {
dp->dscr_cmd0 &= ~DSCR_CMD0_V;
- /* reset our SW status -- this is used to determine
- * if a descriptor is in use by upper level SW. Since
+ /*
+ * Reset our software status -- this is used to determine
+ * if a descriptor is in use by upper level software. Since
* posting can reset 'V' bit.
*/
dp->sw_status = 0;
@@ -800,8 +787,7 @@ au1xxx_dbdma_reset(u32 chanid)
}
EXPORT_SYMBOL(au1xxx_dbdma_reset);
-u32
-au1xxx_get_dma_residue(u32 chanid)
+u32 au1xxx_get_dma_residue(u32 chanid)
{
chan_tab_t *ctp;
au1x_dma_chan_t *cp;
@@ -810,18 +796,15 @@ au1xxx_get_dma_residue(u32 chanid)
ctp = *((chan_tab_t **)chanid);
cp = ctp->chan_ptr;
- /* This is only valid if the channel is stopped.
- */
+ /* This is only valid if the channel is stopped. */
rv = cp->ddma_bytecnt;
au_sync();
return rv;
}
-
EXPORT_SYMBOL_GPL(au1xxx_get_dma_residue);
-void
-au1xxx_dbdma_chan_free(u32 chanid)
+void au1xxx_dbdma_chan_free(u32 chanid)
{
chan_tab_t *ctp;
dbdev_tab_t *stp, *dtp;
@@ -842,8 +825,7 @@ au1xxx_dbdma_chan_free(u32 chanid)
}
EXPORT_SYMBOL(au1xxx_dbdma_chan_free);
-static irqreturn_t
-dbdma_interrupt(int irq, void *dev_id)
+static irqreturn_t dbdma_interrupt(int irq, void *dev_id)
{
u32 intstat;
u32 chan_index;
@@ -859,13 +841,12 @@ dbdma_interrupt(int irq, void *dev_id)
cp = ctp->chan_ptr;
dp = ctp->cur_ptr;
- /* Reset interrupt.
- */
+ /* Reset interrupt. */
cp->ddma_irq = 0;
au_sync();
if (ctp->chan_callback)
- (ctp->chan_callback)(irq, ctp->chan_callparam);
+ ctp->chan_callback(irq, ctp->chan_callparam);
ctp->cur_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
return IRQ_RETVAL(1);
@@ -890,47 +871,47 @@ static void au1xxx_dbdma_init(void)
if (request_irq(irq_nr, dbdma_interrupt, IRQF_DISABLED,
"Au1xxx dbdma", (void *)dbdma_gptr))
- printk("Can't get 1550 dbdma irq");
+ printk(KERN_ERR "Can't get 1550 dbdma irq");
}
-void
-au1xxx_dbdma_dump(u32 chanid)
+void au1xxx_dbdma_dump(u32 chanid)
{
- chan_tab_t *ctp;
- au1x_ddma_desc_t *dp;
- dbdev_tab_t *stp, *dtp;
- au1x_dma_chan_t *cp;
- u32 i = 0;
+ chan_tab_t *ctp;
+ au1x_ddma_desc_t *dp;
+ dbdev_tab_t *stp, *dtp;
+ au1x_dma_chan_t *cp;
+ u32 i = 0;
ctp = *((chan_tab_t **)chanid);
stp = ctp->chan_src;
dtp = ctp->chan_dest;
cp = ctp->chan_ptr;
- printk("Chan %x, stp %x (dev %d) dtp %x (dev %d) \n",
- (u32)ctp, (u32)stp, stp - dbdev_tab, (u32)dtp, dtp - dbdev_tab);
- printk("desc base %x, get %x, put %x, cur %x\n",
- (u32)(ctp->chan_desc_base), (u32)(ctp->get_ptr),
- (u32)(ctp->put_ptr), (u32)(ctp->cur_ptr));
-
- printk("dbdma chan %x\n", (u32)cp);
- printk("cfg %08x, desptr %08x, statptr %08x\n",
- cp->ddma_cfg, cp->ddma_desptr, cp->ddma_statptr);
- printk("dbell %08x, irq %08x, stat %08x, bytecnt %08x\n",
- cp->ddma_dbell, cp->ddma_irq, cp->ddma_stat, cp->ddma_bytecnt);
-
-
- /* Run through the descriptors
- */
+ printk(KERN_DEBUG "Chan %x, stp %x (dev %d) dtp %x (dev %d) \n",
+ (u32)ctp, (u32)stp, stp - dbdev_tab, (u32)dtp,
+ dtp - dbdev_tab);
+ printk(KERN_DEBUG "desc base %x, get %x, put %x, cur %x\n",
+ (u32)(ctp->chan_desc_base), (u32)(ctp->get_ptr),
+ (u32)(ctp->put_ptr), (u32)(ctp->cur_ptr));
+
+ printk(KERN_DEBUG "dbdma chan %x\n", (u32)cp);
+ printk(KERN_DEBUG "cfg %08x, desptr %08x, statptr %08x\n",
+ cp->ddma_cfg, cp->ddma_desptr, cp->ddma_statptr);
+ printk(KERN_DEBUG "dbell %08x, irq %08x, stat %08x, bytecnt %08x\n",
+ cp->ddma_dbell, cp->ddma_irq, cp->ddma_stat,
+ cp->ddma_bytecnt);
+
+ /* Run through the descriptors */
dp = ctp->chan_desc_base;
do {
- printk("Dp[%d]= %08x, cmd0 %08x, cmd1 %08x\n",
- i++, (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
- printk("src0 %08x, src1 %08x, dest0 %08x, dest1 %08x\n",
- dp->dscr_source0, dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1);
- printk("stat %08x, nxtptr %08x\n",
- dp->dscr_stat, dp->dscr_nxtptr);
+ printk(KERN_DEBUG "Dp[%d]= %08x, cmd0 %08x, cmd1 %08x\n",
+ i++, (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
+ printk(KERN_DEBUG "src0 %08x, src1 %08x, dest0 %08x, dest1 %08x\n",
+ dp->dscr_source0, dp->dscr_source1,
+ dp->dscr_dest0, dp->dscr_dest1);
+ printk(KERN_DEBUG "stat %08x, nxtptr %08x\n",
+ dp->dscr_stat, dp->dscr_nxtptr);
dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
} while (dp != ctp->chan_desc_base);
}
@@ -938,32 +919,33 @@ au1xxx_dbdma_dump(u32 chanid)
/* Put a descriptor into the DMA ring.
* This updates the source/destination pointers and byte count.
*/
-u32
-au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr )
+u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr)
{
chan_tab_t *ctp;
au1x_ddma_desc_t *dp;
- u32 nbytes=0;
+ u32 nbytes = 0;
- /* I guess we could check this to be within the
- * range of the table......
- */
+ /*
+ * I guess we could check this to be within the
+ * range of the table......
+ */
ctp = *((chan_tab_t **)chanid);
- /* We should have multiple callers for a particular channel,
- * an interrupt doesn't affect this pointer nor the descriptor,
- * so no locking should be needed.
- */
+ /*
+ * We should have multiple callers for a particular channel,
+ * an interrupt doesn't affect this pointer nor the descriptor,
+ * so no locking should be needed.
+ */
dp = ctp->put_ptr;
- /* If the descriptor is valid, we are way ahead of the DMA
- * engine, so just return an error condition.
- */
+ /*
+ * If the descriptor is valid, we are way ahead of the DMA
+ * engine, so just return an error condition.
+ */
if (dp->dscr_cmd0 & DSCR_CMD0_V)
return 0;
- /* Load up buffer addresses and byte count.
- */
+ /* Load up buffer addresses and byte count. */
dp->dscr_dest0 = dscr->dscr_dest0;
dp->dscr_source0 = dscr->dscr_source0;
dp->dscr_dest1 = dscr->dscr_dest1;
@@ -975,14 +957,11 @@ au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr )
dp->dscr_cmd0 |= dscr->dscr_cmd0 | DSCR_CMD0_V;
ctp->chan_ptr->ddma_dbell = 0;
- /* Get next descriptor pointer.
- */
+ /* Get next descriptor pointer. */
ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
- /* return something not zero.
- */
+ /* Return something non-zero. */
return nbytes;
}
#endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 22:31:52 +0000