From 3f3c646dea6e536ddb3f997309f419365df108cf Mon Sep 17 00:00:00 2001 From: Kinsey Moore Date: Fri, 2 Jun 2023 15:06:09 -0500 Subject: bsps/xqspipsu: Add SFDP config space read ability This adds a function to allow reading of the SFDP configuration space that describes attributes of NOR flash chips. --- bsps/shared/dev/spi/xqspipsu-flash-helper.c | 48 +++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'bsps/shared') 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; -- cgit v1.2.3