1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.h b/drivers/char/xilinx_hwicap/xilinx_hwicap.h
index 405fee7e189b..1f9c8b082dbe 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.h
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.h
@@ -65,10 +65,27 @@ struct hwicap_drvdata {
 };
 
 struct hwicap_driver_config {
+        /* Read configuration data given by size into the data buffer.
+           Return 0 if successful. */
         int (*get_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
                         u32 size);
+        /* Write configuration data given by size from the data buffer.
+           Return 0 if successful. */
         int (*set_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
                         u32 size);
+        /* Get the status register, bit pattern given by:
+         * D8 - 0 = configuration error
+         * D7 - 1 = alignment found
+         * D6 - 1 = readback in progress
+         * D5 - 0 = abort in progress
+         * D4 - Always 1
+         * D3 - Always 1
+         * D2 - Always 1
+         * D1 - Always 1
+         * D0 - 1 = operation completed
+         */
+        u32 (*get_status)(struct hwicap_drvdata *drvdata);
+        /* Reset the hw */
         void (*reset)(struct hwicap_drvdata *drvdata);
 };
 
@@ -163,6 +180,13 @@ struct config_registers {
 /* Constant to use for CRC check when CRC has been disabled */
 #define XHI_DISABLED_AUTO_CRC       0x0000DEFCUL
 
+/* Meanings of the bits returned by get_status */
+#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  */
+
 /**
  * hwicap_type_1_read - Generates a Type 1 read packet header.
  * @reg: is the address of the register to be read back.