staging: comedi: plx9080.h: define PLX_<REG>_TO_<FIELD>(r) macros

Various macros in "plx9080.h" take the form `PLX_<REG>_<FIELD>(x)`,
where `<REG>` is a register name, `<FIELD>` is a field within the
register, and `x` is a value for the field specified by the caller.  The
macros construct a partial register register with the specified field
value placed in the appropriate bits of the register value, and other
bits of the register value zeroed.  Add corresponding macros of the form
`PLX_<REG>_TO_<FIELD>(r)` that extract a field value from a specified
register values.  Remove macros of the form `PLX_<REG>_<FIELD>_SHIFT`
that specified the bit position of a field within a register value as
they are no longer useful.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/plx9080.h

@@ -89,11 +89,11 @@ struct plx_dma_desc {
 /* Local Bus Latency Timer */
 #define PLX_MARBR_LT(x)		(BIT(0) * ((x) & 0xff))
 #define PLX_MARBR_LT_MASK	GENMASK(7, 0)
-#define PLX_MARBR_LT_SHIFT	0
+#define PLX_MARBR_TO_LT(r)	((r) & PLX_MARBR_LT_MASK)
 /* Local Bus Pause Timer */
 #define PLX_MARBR_PT(x)		(BIT(8) * ((x) & 0xff))
 #define PLX_MARBR_PT_MASK	GENMASK(15, 8)
-#define PLX_MARBR_PT_SHIFT	8
+#define PLX_MARBR_TO_PT(r)	(((r) & PLX_MARBR_PT_MASK) >> 8)
 /* Local Bus Latency Timer Enable */
 #define PLX_MARBR_LTEN		BIT(16)
 /* Local Bus Pause Timer Enable */
@@ -171,11 +171,10 @@ struct plx_dma_desc {
 #define PLX_LBRD_MSWIDTH32	(BIT(0) * 2)	/* 32 bits wide */
 #define PLX_LBRD_MSWIDTH32A	(BIT(0) * 3)	/* 32 bits wide */
 #define PLX_LBRD_MSWIDTH_MASK	GENMASK(1, 0)
-#define PLX_LBRD_MSWIDTH_SHIFT	0
 /* Memory Space Internal Wait States */
 #define PLX_LBRD_MSIWS(x)	(BIT(2) * ((x) & 0xf))
 #define PLX_LBRD_MSIWS_MASK	GENMASK(5, 2)
-#define PLX_LBRD_MSIWS_SHIFT	2
+#define PLX_LBRD_TO_MSIWS(r)	(((r) & PLS_LBRD_MSIWS_MASK) >> 2)
 /* Memory Space Ready Input Enable */
 #define PLX_LBRD_MSREADYIEN	BIT(6)
 /* Memory Space BTERM# Input Enable */
@@ -193,18 +192,17 @@ struct plx_dma_desc {
 /* Prefetch Counter */
 #define PLX_LBRD_PFCOUNT(x)	(BIT(11) * ((x) & 0xf))
 #define PLX_LBRD_PFCOUNT_MASK	GENMASK(14, 11)
-#define PLX_LBRD_PFCOUNT_SHIFT	11
+#define PLX_LBRD_TO_PFCOUNT(r)	(((r) & PLX_LBRD_PFCOUNT_MASK) >> 11)
 /* Expansion ROM Space Local Bus Width (LBRD0 only) */
 #define PLX_LBRD0_EROMWIDTH8	(BIT(16) * 0)	/* 8 bits wide */
 #define PLX_LBRD0_EROMWIDTH16	(BIT(16) * 1)	/* 16 bits wide */
 #define PLX_LBRD0_EROMWIDTH32	(BIT(16) * 2)	/* 32 bits wide */
 #define PLX_LBRD0_EROMWIDTH32A	(BIT(16) * 3)	/* 32 bits wide */
 #define PLX_LBRD0_EROMWIDTH_MASK	GENMASK(17, 16)
-#define PLX_LBRD0_EROMWIDTH_SHIFT	16
 /* Expansion ROM Space Internal Wait States (LBRD0 only) */
 #define PLX_LBRD0_EROMIWS(x)	(BIT(18) * ((x) & 0xf))
 #define PLX_LBRD0_EROMIWS_MASK	GENMASK(21, 18)
-#define PLX_LBRD0_EROMIWS_SHIFT	18
+#define PLX_LBRD0_TO_EROMIWS(r)	(((r) & PLX_LBRD0_EROMIWS_MASK) >> 18)
 /* Expansion ROM Space Ready Input Enable (LBDR0 only) */
 #define PLX_LBRD0_EROMREADYIEN	BIT(22)
 /* Expansion ROM Space BTERM# Input Enable (LBRD0 only) */
@@ -220,7 +218,7 @@ struct plx_dma_desc {
 /* PCI Target Retry Delay Clocks / 8 (LBRD0 only) */
 #define PLX_LBRD0_TRDELAY(x)	(BIT(28) * ((x) & 0xF))
 #define PLX_LBRD0_TRDELAY_MASK	GENMASK(31, 28)
-#define PLX_LBRD0_TRDELAY_SHIFT	28
+#define PLX_LBRD0_TO_TRDELAY(r)	(((r) & PLX_LBRD0_TRDELAY_MASK) >> 28)
 
 /* Local Range Register for Direct Master to PCI */
 #define PLX_REG_DMRR		0x001c
@@ -279,19 +277,19 @@ struct plx_dma_desc {
 /* Register Number */
 #define PLX_DMCFGA_REGNUM(x)	(BIT(2) * ((x) & 0x3f))
 #define PLX_DMCFGA_REGNUM_MASK	GENMASK(7, 2)
-#define PLX_DMCFGA_REGNUM_SHIFT	2
+#define PLX_DMCFGA_TO_REGNUM(r)	(((r) & PLX_DMCFGA_REGNUM_MASK) >> 2)
 /* Function Number */
 #define PLX_DMCFGA_FUNCNUM(x)	(BIT(8) * ((x) & 0x7))
 #define PLX_DMCFGA_FUNCNUM_MASK	GENMASK(10, 8)
-#define PLX_DMCFGA_FUNCNUM_SHIFT 8
+#define PLX_DMCFGA_TO_FUNCNUM(r) (((r) & PLX_DMCFGA_FUNCNUM_MASK) >> 8)
 /* Device Number */
 #define PLX_DMCFGA_DEVNUM(x)	(BIT(11) * ((x) & 0x1f))
 #define PLX_DMCFGA_DEVNUM_MASK	GENMASK(15, 11)
-#define PLX_DMCFGA_DEVNUM_SHIFT	11
+#define PLX_DMCFGA_TO_DEVNUM(r)	(((r) & PLX_DMCFGA_DEVNUM_MASK) >> 11)
 /* Bus Number */
 #define PLX_DMCFGA_BUSNUM(x)	(BIT(16) * ((x) & 0xff))
 #define PLX_DMCFGA_BUSNUM_MASK	GENMASK(23, 16)
-#define PLX_DMCFGA_BUSNUM_SHIFT	16
+#define PLX_DMCFGA_TO_BUSNUM(r)	(((r) & PLX_DMCFGA_BUSNUM_MASK) >> 16)
 /* Configuration Enable */
 #define PLX_DMCFGA_CONFIGEN	BIT(31)
 
@@ -402,22 +400,22 @@ struct plx_dma_desc {
 /* PCI Read Command Code For DMA */
 #define PLX_CNTRL_CCRDMA(x)	(BIT(0) * ((x) & 0xf))
 #define PLX_CNTRL_CCRDMA_MASK	GENMASK(3, 0)
-#define PLX_CNTRL_CCRDMA_SHIFT	0
+#define PLX_CNTRL_TO_CCRDMA(r)	((r) & PLX_CNTRL_CCRDMA_MASK)
 #define PLX_CNTRL_CCRDMA_NORMAL	PLX_CNTRL_CCRDMA(14)	/* value after reset */
 /* PCI Write Command Code For DMA 0 */
 #define PLX_CNTRL_CCWDMA(x)	(BIT(4) * ((x) & 0xf))
 #define PLX_CNTRL_CCWDMA_MASK	GENMASK(7, 4)
-#define PLX_CNTRL_CCWDMA_SHIFT	4
+#define PLX_CNTRL_TO_CCWDMA(r)	(((r) & PLX_CNTRL_CCWDMA_MASK) >> 4)
 #define PLX_CNTRL_CCWDMA_NORMAL	PLX_CNTRL_CCWDMA(7)	/* value after reset */
 /* PCI Memory Read Command Code For Direct Master */
 #define PLX_CNTRL_CCRDM(x)	(BIT(8) * ((x) & 0xf))
 #define PLX_CNTRL_CCRDM_MASK	GENMASK(11, 8)
-#define PLX_CNTRL_CCRDM_SHIFT	8
+#define PLX_CNTRL_TO_CCRDM(r)	(((r) & PLX_CNTRL_CCRDM_MASK) >> 8)
 #define PLX_CNTRL_CCRDM_NORMAL	PLX_CNTRL_CCRDM(6)	/* value after reset */
 /* PCI Memory Write Command Code For Direct Master */
 #define PLX_CNTRL_CCWDM(x)	(BIT(12) * ((x) & 0xf))
 #define PLX_CNTRL_CCWDM_MASK	GENMASK(15, 12)
-#define PLX_CNTRL_CCWDM_SHIFT	12
+#define PLX_CNTRL_TO_CCWDM(r)	(((r) & PLX_CNTRL_CCWDM_MASK) >> 12)
 #define PLX_CNTRL_CCWDM_NORMAL	PLX_CNTRL_CCWDM(7)	/* value after reset */
 /* General Purpose Output (USERO) */
 #define PLX_CNTRL_USERO		BIT(16)
@@ -469,11 +467,10 @@ struct plx_dma_desc {
 #define PLX_DMAMODE_WIDTH32	(BIT(0) * 2)	/* 32 bits wide */
 #define PLX_DMAMODE_WIDTH32A	(BIT(0) * 3)	/* 32 bits wide */
 #define PLX_DMAMODE_WIDTH_MASK	GENMASK(1, 0)
-#define PLX_DMAMODE_WIDTH_SHIFT	0
 /* Internal Wait States */
 #define PLX_DMAMODE_IWS(x)	(BIT(2) * ((x) & 0xf))
 #define PLX_DMAMODE_IWS_MASK	GENMASK(5, 2)
-#define PLX_DMAMODE_SHIFT	2
+#define PLX_DMAMODE_TO_IWS(r)	(((r) & PLX_DMAMODE_IWS_MASK) >> 2)
 /* Ready Input Enable */
 #define PLX_DMAMODE_READYIEN	BIT(6)
 /* BTERM# Input Enable */
@@ -560,35 +557,35 @@ struct plx_dma_desc {
 /* DMA Channel 0 PCI-to-Local Almost Full (divided by 2, minus 1) */
 #define PLX_DMATHR_C0PLAF(x)	(BIT(0) * ((x) & 0xf))
 #define PLX_DMATHR_C0PLAF_MASK	GENMASK(3, 0)
-#define PLX_DMATHR_C0PLAF_SHIFT	0
+#define PLX_DMATHR_TO_C0PLAF(r)	((r) & PLX_DMATHR_C0PLAF_MASK)
 /* DMA Channel 0 Local-to-PCI Almost Empty (divided by 2, minus 1) */
 #define PLX_DMATHR_C0LPAE(x)	(BIT(4) * ((x) & 0xf))
 #define PLX_DMATHR_C0LPAE_MASK	GENMASK(7, 4)
-#define PLX_DMATHR_C0LPAE_SHIFT	4
+#define PLX_DMATHR_TO_C0LPAE(r)	(((r) & PLX_DMATHR_C0LPAE_MASK) >> 4)
 /* DMA Channel 0 Local-to-PCI Almost Full (divided by 2, minus 1) */
 #define PLX_DMATHR_C0LPAF(x)	(BIT(8) * ((x) & 0xf))
 #define PLX_DMATHR_C0LPAF_MASK	GENMASK(11, 8)
-#define PLX_DMATHR_C0LPAF_SHIFT	8
+#define PLX_DMATHR_TO_C0LPAF(r)	(((r) & PLX_DMATHR_C0LPAF_MASK) >> 8)
 /* DMA Channel 0 PCI-to-Local Almost Empty (divided by 2, minus 1) */
 #define PLX_DMATHR_C0PLAE(x)	(BIT(12) * ((x) & 0xf))
 #define PLX_DMATHR_C0PLAE_MASK	GENMASK(15, 12)
-#define PLX_DMATHR_C0PLAE_SHIFT	12
+#define PLX_DMATHR_TO_C0PLAE(r)	(((r) & PLX_DMATHR_C0PLAE_MASK) >> 12)
 /* DMA Channel 1 PCI-to-Local Almost Full (divided by 2, minus 1) */
 #define PLX_DMATHR_C1PLAF(x)	(BIT(16) * ((x) & 0xf))
 #define PLX_DMATHR_C1PLAF_MASK	GENMASK(19, 16)
-#define PLX_DMATHR_C1PLAF_SHIFT	16
+#define PLX_DMATHR_TO_C1PLAF(r)	(((r) & PLX_DMATHR_C1PLAF_MASK) >> 16)
 /* DMA Channel 1 Local-to-PCI Almost Empty (divided by 2, minus 1) */
 #define PLX_DMATHR_C1LPAE(x)	(BIT(20) * ((x) & 0xf))
 #define PLX_DMATHR_C1LPAE_MASK	GENMASK(23, 20)
-#define PLX_DMATHR_C1LPAE_SHIFT	20
+#define PLX_DMATHR_TO_C1LPAE(r)	(((r) & PLX_DMATHR_C1LPAE_MASK) >> 20)
 /* DMA Channel 1 Local-to-PCI Almost Full (divided by 2, minus 1) */
 #define PLX_DMATHR_C1LPAF(x)	(BIT(24) * ((x) & 0xf))
 #define PLX_DMATHR_C1LPAF_MASK	GENMASK(27, 24)
-#define PLX_DMATHR_C1LPAF_SHIFT	24
+#define PLX_DMATHR_TO_C1LPAF(r)	(((r) & PLX_DMATHR_C1LPAF_MASK) >> 24)
 /* DMA Channel 1 PCI-to-Local Almost Empty (divided by 2, minus 1) */
 #define PLX_DMATHR_C1PLAE(x)	(BIT(28) * ((x) & 0xf))
 #define PLX_DMATHR_C1PLAE_MASK	GENMASK(31, 28)
-#define PLX_DMATHR_C1PLAE_SHIFT	28
+#define PLX_DMATHR_TO_C1PLAE(r)	(((r) & PLX_DMATHR_C1PLAE_MASK) >> 28)
 
 /*
  * Messaging Queue Registers OPLFIS, OPLFIM, IQP, OQP, MQCR, QBAR, IFHPR,