This adds a function to allow reading of the SFDP configuration space
that describes attributes of NOR flash chips.
---
bsps/include/dev/spi/xqspipsu-flash-helper.h | 20 ++++++++
bsps/include/dev/spi/xqspipsu_flash_config.h | 1 +
bsps/shared/dev/spi/xqspipsu-flash-helper.c | 48 ++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/bsps/include/dev/spi/xqspipsu-flash-helper.h
b/bsps/include/dev/spi/xqspipsu-flash-helper.h
index 1578fe8485..e689660881 100644
--- a/bsps/include/dev/spi/xqspipsu-flash-helper.h
+++ b/bsps/include/dev/spi/xqspipsu-flash-helper.h
@@ -170,3 +170,23 @@ u32 QspiPsu_NOR_Get_Sector_Size(XQspiPsu *QspiPsuPtr);
*
******************************************************************************/
int QspiPsu_NOR_RDID(XQspiPsu *QspiPsuPtr, u8 *ReadBfrPtr, u32 ReadLen);
+
+/*****************************************************************************/
+/**
+ *
+ * This function performs a read of the SFDP configuration space.
+ *
+ * @param QspiPsuPtr is a pointer to the QSPIPSU driver component to use.
+ * @param ReadBfrPtr is a pointer to a buffer to be filled with
+ * configuration data.
+ * @param ReadLen is the total length of the configuration space to read.
+ *
+ * @return XST_SUCCESS if successful, else XST_FAILURE.
+ *
+
******************************************************************************/
+int QspiPsu_NOR_RDSFDP(
+ XQspiPsu *QspiPsuPtr,
+ u32 Address,
+ u32 ByteCount,
+ u8 **ReadBfrPtr
+);
diff --git a/bsps/include/dev/spi/xqspipsu_flash_config.h
b/bsps/include/dev/spi/xqspipsu_flash_config.h
index 8310a87536..0b04fffc28 100644
--- a/bsps/include/dev/spi/xqspipsu_flash_config.h
+++ b/bsps/include/dev/spi/xqspipsu_flash_config.h
@@ -64,6 +64,7 @@ extern "C" {
#define BULK_ERASE_CMD 0xC7
#define SEC_ERASE_CMD 0xD8
#define READ_ID 0x9F
+#define READ_SFDP 0x5A
#define READ_CONFIG_CMD 0x35
#define WRITE_CONFIG_CMD 0x01
#define ENTER_4B_ADDR_MODE 0xB7
diff --git a/bsps/shared/dev/spi/xqspipsu-flash-helper.c
b/bsps/shared/dev/spi/xqspipsu-flash-helper.c
index 0dd065f02e..69c4035e6a 100644
--- a/bsps/shared/dev/spi/xqspipsu-flash-helper.c
+++ b/bsps/shared/dev/spi/xqspipsu-flash-helper.c
@@ -274,6 +274,54 @@ static void QspiPsuHandler(
}
}
+int QspiPsu_NOR_RDSFDP(
+ XQspiPsu *QspiPsuPtr,
+ u32 Address,
+ u32 ByteCount,
+ u8 **ReadBfrPtr
+)
+{
+ int Status;
+
+ *ReadBfrPtr = ReadBuffer;
+
+ CmdBfr[COMMAND_OFFSET] = READ_SFDP;
+ CmdBfr[ADDRESS_1_OFFSET] =
+ (u8)((Address & 0xFF0000) >> 16);
+ CmdBfr[ADDRESS_2_OFFSET] =
+ (u8)((Address & 0xFF00) >> 8);
+ CmdBfr[ADDRESS_3_OFFSET] =
+ (u8)(Address & 0xFF);
+
+ FlashMsg[0].BusWidth = XQSPIPSU_SELECT_MODE_SPI;
+ FlashMsg[0].TxBfrPtr = CmdBfr;
+ FlashMsg[0].RxBfrPtr = NULL;
+ FlashMsg[0].ByteCount = 4;
+ FlashMsg[0].Flags = XQSPIPSU_MSG_FLAG_TX;
+
+ FlashMsg[1].BusWidth = XQSPIPSU_SELECT_MODE_SPI;
+ FlashMsg[1].TxBfrPtr = NULL;
+ FlashMsg[1].RxBfrPtr = NULL;
+ FlashMsg[1].ByteCount = DUMMY_CLOCKS;
+ FlashMsg[1].Flags = 0;
+
+ FlashMsg[2].BusWidth = XQSPIPSU_SELECT_MODE_SPI;
+ FlashMsg[2].TxBfrPtr = NULL;
+ FlashMsg[2].RxBfrPtr = *ReadBfrPtr;
+ FlashMsg[2].ByteCount = ByteCount;
+ FlashMsg[2].Flags = XQSPIPSU_MSG_FLAG_RX;
+
+ TransferInProgress = TRUE;
+ Status = XQspiPsu_InterruptTransfer(QspiPsuPtr, FlashMsg, 3);
+ if (Status != XST_SUCCESS)
+ return XST_FAILURE;
+
+ while (TransferInProgress);
+
+ rtems_cache_invalidate_multiple_data_lines(ReadBuffer, ByteCount);
+ return 0;
+}
+
int QspiPsu_NOR_RDID(XQspiPsu *QspiPsuPtr, u8 *ReadBfrPtr, u32 ReadLen)
{
int Status;
--
2.39.2
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