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dpgeorgedpgeorge
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stmhal/usbdev: For MSC implement SCSI SYNCHRONIZE_CACHE command.
Currently just a dummy command that returns "success", but it's needed for some O/S's to correctly talk with the SCSI layer.
1 parent e1cda00 commit 22cedef

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Lines changed: 14 additions & 0 deletions

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‎stmhal/usbdev/class/inc/usbd_msc_scsi.h‎

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Original file line numberDiff line numberDiff line change
@@ -55,6 +55,8 @@
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#define SCSI_MODE_SENSE6 0x1A
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#define SCSI_MODE_SENSE10 0x5A
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#define SCSI_ALLOW_MEDIUM_REMOVAL 0x1E
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#define SCSI_SYNCHRONIZE_CACHE10 0x35
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#define SCSI_SYNCHRONIZE_CACHE16 0x91
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#define SCSI_READ6 0x08
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#define SCSI_READ10 0x28
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#define SCSI_READ12 0xA8

‎stmhal/usbdev/class/src/usbd_msc_scsi.c‎

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Original file line numberDiff line numberDiff line change
@@ -89,6 +89,7 @@ static int8_t SCSI_StartStopUnit(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t
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static int8_t SCSI_AllowMediumRemoval(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params);
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static int8_t SCSI_ModeSense6 (USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params);
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static int8_t SCSI_ModeSense10 (USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params);
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static int8_t SCSI_SynchronizeCache(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params);
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static int8_t SCSI_Write10(USBD_HandleTypeDef *pdev, uint8_t lun , uint8_t *params);
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static int8_t SCSI_Read10(USBD_HandleTypeDef *pdev, uint8_t lun , uint8_t *params);
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static int8_t SCSI_Verify10(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params);
@@ -151,6 +152,10 @@ int8_t SCSI_ProcessCmd(USBD_HandleTypeDef *pdev,
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case SCSI_MODE_SENSE10:
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return SCSI_ModeSense10 (pdev, lun, params);
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case SCSI_SYNCHRONIZE_CACHE10:
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case SCSI_SYNCHRONIZE_CACHE16:
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return SCSI_SynchronizeCache(pdev, lun, params);
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case SCSI_READ_FORMAT_CAPACITIES:
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return SCSI_ReadFormatCapacity(pdev, lun, params);
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@@ -374,6 +379,13 @@ static int8_t SCSI_ModeSense10 (USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t
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return 0;
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}
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static int8_t SCSI_SynchronizeCache(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *params) {
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// nothing to synchronize, so just return "success"
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->bot_data_length = 0;
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return 0;
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}
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/**
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* @brief SCSI_RequestSense
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* Process Request Sense command

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