fpga: x400: Add SPI Controller Info register

Include a register that contains SPI controller information.
Currently, it only provides the number of slaves addressable
by the SPI engine.

1 files changed, 9 insertions, 0 deletions

diff --git a/fpga/usrp3/top/x400/regmap/dig_ifc_regmap_utils.vh b/fpga/usrp3/top/x400/regmap/dig_ifc_regmap_utils.vh
index bca2c4da8..21ce45360 100644
--- a/fpga/usrp3/top/x400/regmap/dig_ifc_regmap_utils.vh
+++ b/fpga/usrp3/top/x400/regmap/dig_ifc_regmap_utils.vh
@@ -15,6 +15,7 @@
   // SPI_TRANSACTION_CONFIG : 0x10 (x4xx_gpio_spi.v)
   // SPI_TRANSACTION_GO     : 0x14 (x4xx_gpio_spi.v)
   // SPI_STATUS             : 0x18 (x4xx_gpio_spi.v)
+  // CONTROLLER_INFO        : 0x1C (x4xx_gpio_spi.v)
 
 //===============================================================================
 // RegTypes
@@ -82,6 +83,14 @@
   localparam SPI_READY_MSB  = 24;  //SPI_STATUS:SPI_READY
   localparam SPI_READY      = 24;  //SPI_STATUS:SPI_READY
 
+  // CONTROLLER_INFO Register (from x4xx_gpio_spi.v)
+  localparam CONTROLLER_INFO = 'h1C; // Register Offset
+  localparam CONTROLLER_INFO_SIZE = 32;  // register width in bits
+  localparam CONTROLLER_INFO_MASK = 32'hF;
+  localparam SLAVE_COUNT_SIZE = 4;  //CONTROLLER_INFO:SLAVE_COUNT
+  localparam SLAVE_COUNT_MSB  = 3;  //CONTROLLER_INFO:SLAVE_COUNT
+  localparam SLAVE_COUNT      = 0;  //CONTROLLER_INFO:SLAVE_COUNT
+
   // Return the offset of an element of register array SPI_SLAVE_CONFIG
   function integer SPI_SLAVE_CONFIG (input integer i);
     SPI_SLAVE_CONFIG = (i * 'h4) + 'h0;