linux-kernel - [PATCH 07/20] staging: comedi: drivers: re-do PLX PCI 9080 BIGEND register values

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Message-Id: <1463752162-15181-8-git-send-email-abbotti@mev.co.uk>
Date:	Fri, 20 May 2016 14:49:09 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	devel@...verdev.osuosl.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 07/20] staging: comedi: drivers: re-do PLX PCI 9080 BIGEND register values

Replace `enum bigend_bits` in "plx9080.h" with a bunch of macros
defining values for the BIGEND register.  Use the prefix `PLX_BIGEND_`
for the macro names.  Make use of the `BIT(x)` and `GENMASK(h,l)` macros
to define the values.

Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
 drivers/staging/comedi/drivers/cb_pcidas64.c |  2 +-
 drivers/staging/comedi/drivers/gsc_hpdi.c    |  2 +-
 drivers/staging/comedi/drivers/plx9080.h     | 33 +++++++++++++++-------------
 3 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c b/drivers/staging/comedi/drivers/cb_pcidas64.c
index f997c1f..4a8e88a 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas64.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas64.c
@@ -1294,7 +1294,7 @@ static void init_plx9080(struct comedi_device *dev)
 		readl(devpriv->plx9080_iobase + PLX_REG_CNTRL);
 
 #ifdef __BIG_ENDIAN
-	bits = BIGEND_DMA0 | BIGEND_DMA1;
+	bits = PLX_BIGEND_DMA0 | PLX_BIGEND_DMA1;
 #else
 	bits = 0;
 #endif
diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c
index e2831e1..536bebe 100644
--- a/drivers/staging/comedi/drivers/gsc_hpdi.c
+++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
@@ -547,7 +547,7 @@ static void gsc_hpdi_init_plx9080(struct comedi_device *dev)
 	void __iomem *plx_iobase = devpriv->plx9080_mmio;
 
 #ifdef __BIG_ENDIAN
-	bits = BIGEND_DMA0 | BIGEND_DMA1;
+	bits = PLX_BIGEND_DMA0 | PLX_BIGEND_DMA1;
 #else
 	bits = 0;
 #endif
diff --git a/drivers/staging/comedi/drivers/plx9080.h b/drivers/staging/comedi/drivers/plx9080.h
index 0bcdbad..84dd366 100644
--- a/drivers/staging/comedi/drivers/plx9080.h
+++ b/drivers/staging/comedi/drivers/plx9080.h
@@ -125,21 +125,24 @@ struct plx_dma_desc {
 /* Big/Little Endian Descriptor Register */
 #define PLX_REG_BIGEND		0x000c
 
-enum bigend_bits {
-	/* use big endian ordering for configuration register accesses */
-	BIGEND_CONFIG = 0x1,
-	BIGEND_DIRECT_MASTER = 0x2,
-	BIGEND_DIRECT_SLAVE_LOCAL0 = 0x4,
-	BIGEND_ROM = 0x8,
-	/*
-	 * use byte lane consisting of most significant bits instead of
-	 * least significant
-	 */
-	BIGEND_BYTE_LANE = 0x10,
-	BIGEND_DIRECT_SLAVE_LOCAL1 = 0x20,
-	BIGEND_DMA1 = 0x40,
-	BIGEND_DMA0 = 0x80,
-};
+/* Configuration Register Big Endian Mode */
+#define PLX_BIGEND_CONFIG	BIT(0)
+/* Direct Master Big Endian Mode */
+#define PLX_BIGEND_DM		BIT(1)
+/* Direct Slave Address Space 0 Big Endian Mode */
+#define PLX_BIGEND_DSAS0	BIT(2)
+/* Direct Slave Expansion ROM Big Endian Mode */
+#define PLX_BIGEND_EROM		BIT(3)
+/* Big Endian Byte Lane Mode - use most significant byte lanes */
+#define PLX_BIGEND_BEBLM	BIT(4)
+/* Direct Slave Address Space 1 Big Endian Mode */
+#define PLX_BIGEND_DSAS1	BIT(5)
+/* DMA Channel 1 Big Endian Mode */
+#define PLX_BIGEND_DMA1		BIT(6)
+/* DMA Channel 0 Big Endian Mode */
+#define PLX_BIGEND_DMA0		BIT(7)
+/* DMA Channel N Big Endian Mode (N <= 1) */
+#define PLX_BIGEND_DMA(n)	((n) ? PLX_BIGEND_DMA1 : PLX_BIGEND_DMA0)
 
 /*
 ** Note: The Expansion ROM  stuff is only relevant to the PC environment.
-- 
2.8.1