[POWERPC] Xilinx: hwicap: Refactor status handling code.

Both the buffer-based and fifo-based icap cores have a status
register.  Previously, this was only used internally to check whether
transactions have completed.  However, the status can be useful to the
main driver as well.  This patch exposes these status functions to the
main driver along with some masks for the differnet bits.

Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 23 insertions, 8 deletions

diff --git a/drivers/char/xilinx_hwicap/fifo_icap.c b/drivers/char/xilinx_hwicap/fifo_icap.c
index 6f45dbd47125..776b50528478 100644
--- a/drivers/char/xilinx_hwicap/fifo_icap.c
+++ b/drivers/char/xilinx_hwicap/fifo_icap.c
@@ -78,13 +78,6 @@
 #define XHI_CR_READ_MASK 0x00000002 /* Read from ICAP to FIFO */
 #define XHI_CR_WRITE_MASK 0x00000001 /* Write from FIFO to ICAP */
 
-/* Status Register (SR) */
-#define XHI_SR_CFGERR_N_MASK 0x00000100 /* Config Error Mask */
-#define XHI_SR_DALIGN_MASK 0x00000080 /* Data Alignment Mask */
-#define XHI_SR_RIP_MASK 0x00000040 /* Read back Mask */
-#define XHI_SR_IN_ABORT_N_MASK 0x00000020 /* Select Map Abort Mask */
-#define XHI_SR_DONE_MASK 0x00000001 /* Done bit Mask  */
-
 
 #define XHI_WFO_MAX_VACANCY 1024 /* Max Write FIFO Vacancy, in words */
 #define XHI_RFO_MAX_OCCUPANCY 256 /* Max Read FIFO Occupancy, in words */
@@ -152,13 +145,35 @@ static inline void fifo_icap_start_readback(struct hwicap_drvdata *drvdata)
 }
 
 /**
+ * fifo_icap_get_status - Get the contents of the status register.
+ * @drvdata: a pointer to the drvdata.
+ *
+ * The status register contains the ICAP status and the done bit.
+ *
+ * D8 - cfgerr
+ * D7 - dalign
+ * D6 - rip
+ * D5 - in_abort_l
+ * D4 - Always 1
+ * D3 - Always 1
+ * D2 - Always 1
+ * D1 - Always 1
+ * D0 - Done bit
+ **/
+u32 fifo_icap_get_status(struct hwicap_drvdata *drvdata)
+{
+	u32 status = in_be32(drvdata->base_address + XHI_SR_OFFSET);
+	dev_dbg(drvdata->dev, "Getting status = %x\n", status);
+	return status;
+}
+
+/**
  * fifo_icap_busy - Return true if the ICAP is still processing a transaction.
  * @drvdata: a pointer to the drvdata.
  **/
 static inline u32 fifo_icap_busy(struct hwicap_drvdata *drvdata)
 {
 	u32 status = in_be32(drvdata->base_address + XHI_SR_OFFSET);
-	dev_dbg(drvdata->dev, "Getting status = %x\n", status);
 	return (status & XHI_SR_DONE_MASK) ? 0 : 1;
 }