Thread (13 messages) flat view 13 messages, 7 authors, 2007-09-13

Re: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xx processors.

From: Randy Dunlap <hidden>
Date: 2007-09-07 15:59:40
Also in: lkml

On Fri,  7 Sep 2007 18:54:18 +0800 Zhang Wei wrote:
quoted hunk ↗ jump to hunk
Signed-off-by: Zhang Wei <redacted>
Signed-off-by: Ebony Zhu <redacted>
---
 drivers/dma/Kconfig  |    8 +
 drivers/dma/Makefile |    1 +
 drivers/dma/fsldma.c |  995 ++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/dma/fsldma.h |  188 ++++++++++
 4 files changed, 1192 insertions(+), 0 deletions(-)
 create mode 100644 drivers/dma/fsldma.c
 create mode 100644 drivers/dma/fsldma.h
--- /dev/null
+++ b/drivers/dma/fsldma.c
@@ -0,0 +1,995 @@
Thanks for using kernel-doc notation.  However, ...
+/**
+ * fsl_dma_alloc_descriptor - Allocate descriptor from channel's DMA pool.
Function parameters need to be listed & described here.
See Documentation/kernel-doc-nano-HOWTO.txt or other source files
for examples.

(Applies to all documented function interfaces here.)
+ *
+ * Return - The descriptor allocated. NULL for failed.
+ */
+static struct fsl_desc_sw *fsl_dma_alloc_descriptor(
+					struct fsl_dma_chan *fsl_chan,
+					gfp_t flags)
+{
...
+}
+/**
+ * fsl_chan_xfer_ld_queue -- Transfer the link descriptors in channel
+ *                           ld_queue.
The function's "short description" (unfortunately) must be on only one
line.  E.g.:

 * fsl_chan_xfer_ld_queue - Transfer link descriptors in channel ld_queue.
+ */
+static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan)
+{
...
+}
quoted hunk ↗ jump to hunk
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
new file mode 100644
index 0000000..05be9ed
--- /dev/null
+++ b/drivers/dma/fsldma.h
@@ -0,0 +1,188 @@
+struct fsl_dma_chan_regs {
+	__mix32	mr;		/* 0x00 - Mode Register */
+	__mix32	sr;		/* 0x04 - Status Register */
+	__mix64	cdar;		/* 0x08 - Cureent descriptor address register */
                                          Current
+	__mix64	sar;		/* 0x10 - Source Address Register */
+	__mix64	dar;		/* 0x18 - Destination Address Register */
+	__mix32	bcr;		/* 0x20 - Byte Count Register */
+	__mix64	ndar;		/* 0x24 - Next Descriptor Address Register */
+};
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
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