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fpga: x400: Add SPI Controller Info register

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


Original-commit: 1d7d1226e7576bfad484109afd3aad4e78af111b
This commit is contained in:
Javier Valenzuela
2022-03-04 09:41:24 -06:00
committed by Wade Fife
parent 56b8f83341
commit 11ca44bbb3
6 changed files with 156 additions and 11 deletions
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top/x400/regmap/dig_ifc_regmap_utils.vh
+9
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@@ -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;