Add macros in "plx9080.h" that define values for the DMATHR register
values. Use the prefix `PLX_DMATHR_` for the macros. Make use of the
`BIT(x)` and `GENMASK(h,l)` macros to define the values.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/staging/comedi/drivers/plx9080.h | 41 ++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/staging/comedi/drivers/plx9080.h b/drivers/staging/comedi/drivers/plx9080.h
index 9e76342..50d0b1b 100644
--- a/drivers/staging/comedi/drivers/plx9080.h
+++ b/drivers/staging/comedi/drivers/plx9080.h
@@ -544,6 +544,47 @@ struct plx_dma_desc {
#define PLX_REG_DMATHR 0x00b0
/*
+ * DMA Threshold constraints:
+ * (C0PLAF + 1) + (C0PLAE + 1) <= 32
+ * (C0LPAF + 1) + (C0LPAE + 1) <= 32
+ * (C1PLAF + 1) + (C1PLAE + 1) <= 16
+ * (C1LPAF + 1) + (C1LPAE + 1) <= 16
+ */
+
+/* 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
+/* 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
+/* 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
+/* 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
+/* 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
+/* 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
+/* 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
+/* 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
+
+/*
* Messaging Queue Registers OPLFIS, OPLFIM, IQP, OQP, MQCR, QBAR, IFHPR,
* IFTPR, IPHPR, IPTPR, OFHPR, OFTPR, OPHPR, OPTPR, and QSR have been omitted.
* They are used by the I2O feature. (IQP and OQP occupy the usual offsets of
--
2.8.1
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