summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorGuennadi Liakhovetski <lg@denx.de>2009-04-02 13:36:58 +0400
committerDan Williams <dan.j.williams@intel.com>2009-04-03 03:59:10 +0400
commit8c6db1bbf80123839ec87bdd6cb364aea384623d (patch)
tree848b8d42f093c03a046bd9ae204b360b5174ea28 /drivers
parentd9de451989a88a2003ca06e524aca4665c0c7f06 (diff)
downloadlinux-8c6db1bbf80123839ec87bdd6cb364aea384623d.tar.xz
dma: Add SoF and EoF debugging to ipu_idmac.c, minor cleanup
Add Start-of-Frame and End-of-Frame debugging to ipu_idmac.c, in the future it might also be needed for the actual video processing in mx3-camera, at which point, the ISRs will have to be transferred to mx3_camera.c, for which ipu_irq_map() and ipu_irq_unmap() functions will have to be exported. Also simplify a couple of pointer-dereferences. Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dma/ipu/ipu_idmac.c65
1 files changed, 56 insertions, 9 deletions
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 7ce0e25266dc..90773844cc89 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1442,8 +1442,8 @@ static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan
unsigned long flags;
/* We only can handle these three channels so far */
- if (ichan->dma_chan.chan_id != IDMAC_SDC_0 && ichan->dma_chan.chan_id != IDMAC_SDC_1 &&
- ichan->dma_chan.chan_id != IDMAC_IC_7)
+ if (chan->chan_id != IDMAC_SDC_0 && chan->chan_id != IDMAC_SDC_1 &&
+ chan->chan_id != IDMAC_IC_7)
return NULL;
if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE) {
@@ -1484,7 +1484,7 @@ static void idmac_issue_pending(struct dma_chan *chan)
/* This is not always needed, but doesn't hurt either */
spin_lock_irqsave(&ipu->lock, flags);
- ipu_select_buffer(ichan->dma_chan.chan_id, ichan->active_buffer);
+ ipu_select_buffer(chan->chan_id, ichan->active_buffer);
spin_unlock_irqrestore(&ipu->lock, flags);
/*
@@ -1541,6 +1541,28 @@ static void idmac_terminate_all(struct dma_chan *chan)
mutex_unlock(&ichan->chan_mutex);
}
+#ifdef DEBUG
+static irqreturn_t ic_sof_irq(int irq, void *dev_id)
+{
+ struct idmac_channel *ichan = dev_id;
+ printk(KERN_DEBUG "Got SOF IRQ %d on Channel %d\n",
+ irq, ichan->dma_chan.chan_id);
+ disable_irq(irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ic_eof_irq(int irq, void *dev_id)
+{
+ struct idmac_channel *ichan = dev_id;
+ printk(KERN_DEBUG "Got EOF IRQ %d on Channel %d\n",
+ irq, ichan->dma_chan.chan_id);
+ disable_irq(irq);
+ return IRQ_HANDLED;
+}
+
+static int ic_sof = -EINVAL, ic_eof = -EINVAL;
+#endif
+
static int idmac_alloc_chan_resources(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
@@ -1554,7 +1576,7 @@ static int idmac_alloc_chan_resources(struct dma_chan *chan)
chan->cookie = 1;
ichan->completed = -ENXIO;
- ret = ipu_irq_map(ichan->dma_chan.chan_id);
+ ret = ipu_irq_map(chan->chan_id);
if (ret < 0)
goto eimap;
@@ -1575,17 +1597,28 @@ static int idmac_alloc_chan_resources(struct dma_chan *chan)
if (ret < 0)
goto erirq;
+#ifdef DEBUG
+ if (chan->chan_id == IDMAC_IC_7) {
+ ic_sof = ipu_irq_map(69);
+ if (ic_sof > 0)
+ request_irq(ic_sof, ic_sof_irq, 0, "IC SOF", ichan);
+ ic_eof = ipu_irq_map(70);
+ if (ic_eof > 0)
+ request_irq(ic_eof, ic_eof_irq, 0, "IC EOF", ichan);
+ }
+#endif
+
ichan->status = IPU_CHANNEL_INITIALIZED;
- dev_dbg(&ichan->dma_chan.dev->device, "Found channel 0x%x, irq %d\n",
- ichan->dma_chan.chan_id, ichan->eof_irq);
+ dev_dbg(&chan->dev->device, "Found channel 0x%x, irq %d\n",
+ chan->chan_id, ichan->eof_irq);
return ret;
erirq:
ipu_uninit_channel(idmac, ichan);
eichan:
- ipu_irq_unmap(ichan->dma_chan.chan_id);
+ ipu_irq_unmap(chan->chan_id);
eimap:
return ret;
}
@@ -1600,8 +1633,22 @@ static void idmac_free_chan_resources(struct dma_chan *chan)
__idmac_terminate_all(chan);
if (ichan->status > IPU_CHANNEL_FREE) {
+#ifdef DEBUG
+ if (chan->chan_id == IDMAC_IC_7) {
+ if (ic_sof > 0) {
+ free_irq(ic_sof, ichan);
+ ipu_irq_unmap(69);
+ ic_sof = -EINVAL;
+ }
+ if (ic_eof > 0) {
+ free_irq(ic_eof, ichan);
+ ipu_irq_unmap(70);
+ ic_eof = -EINVAL;
+ }
+ }
+#endif
free_irq(ichan->eof_irq, ichan);
- ipu_irq_unmap(ichan->dma_chan.chan_id);
+ ipu_irq_unmap(chan->chan_id);
}
ichan->status = IPU_CHANNEL_FREE;
@@ -1663,7 +1710,7 @@ static int __init ipu_idmac_init(struct ipu *ipu)
dma_chan->device = &idmac->dma;
dma_chan->cookie = 1;
dma_chan->chan_id = i;
- list_add_tail(&ichan->dma_chan.device_node, &dma->channels);
+ list_add_tail(&dma_chan->device_node, &dma->channels);
}
idmac_write_icreg(ipu, 0x00000070, IDMAC_CONF);