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Honor Write protect

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This commit is contained in:
Andrew J. Kroll 2013-05-14 06:45:35 -04:00
parent 1cc3036eac
commit bf8aedf382
2 changed files with 27 additions and 17 deletions
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17
masstorage.cpp
View file

@ -183,23 +183,34 @@ Fail:
return rcode;
};
// This will be used to check for write protect.
boolean BulkOnly::WriteProtected(uint8_t lun) {
return WriteOk[lun];
}
// Check for write protect.
uint8_t BulkOnly::Page3F(uint8_t lun) {
uint8_t buf[192];
for (int i = 0; i < 192; i++) {
buf[i] = 0x00;
}
WriteOk[lun] = true;
uint8_t rc = ModeSense(lun, 0, 0x3f, 0, 192, buf);
//if (rc) rc = ModeSense(lun, 0, 0x00, 0, 4, buf);
//if (rc) rc = ModeSense(lun, 0, 0x3f, 0, 192, buf);
if (!rc) {
// write_protect = ((buf[2] & 0x80) != 0);
WriteOk[lun] = ((buf[2] & 0x80) == 0);
Notify(PSTR("Mode Sense: "), 0x80);
for (int i = 0; i < 4; i++) {
PrintHex<uint8_t > (buf[i], 0x80);
Notify(PSTR(" "), 0x80);
}
#if 0
if(WriteOk[lun]) {
Notify(PSTR(" Writes Allowed"), 0x80);
} else {
Notify(PSTR(" Writes Denied"), 0x80);
}
#endif
Notify(PSTR("\r\n"), 0x80);
}
return rc;
@ -808,7 +819,7 @@ uint8_t BulkOnly::Read(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t block
uint8_t BulkOnly::Write(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t blocks, const uint8_t * buf) {
if (!LUNOk[lun]) return MASS_ERR_NO_MEDIA;
//Poll();
if(!WriteOk[lun]) return MASS_ERR_WRITE_PROTECTED;
Notify(PSTR("\r\nWrite LUN:\t"), 0x80);
PrintHex<uint8_t > (lun, 0x90);
//printf("LUN=%i LBA=%8.8X BLOCKS=%i SIZE=%i\r\n", lun, addr, blocks, bsize);

27
masstorage.h
View file

@ -106,6 +106,7 @@
#define MASS_ERR_WRITE_STALL 0x14
#define MASS_ERR_READ_NAKS 0x15
#define MASS_ERR_WRITE_NAKS 0x16
#define MASS_ERR_WRITE_PROTECTED 0x17
#define MASS_ERR_GENERAL_SCSI_ERROR 0xFE
#define MASS_ERR_GENERAL_USB_ERROR 0xFF
#define MASS_ERR_USER 0xA0 // For subclasses to define their own error codes
@ -226,18 +227,9 @@ protected:
uint32_t CurrentCapacity[MASS_MAX_SUPPORTED_LUN]; // Total sectors
uint16_t CurrentSectorSize[MASS_MAX_SUPPORTED_LUN]; // Sector size, clipped to 16 bits
bool LUNOk[MASS_MAX_SUPPORTED_LUN]; // use this to check for media changes.
bool WriteOk[MASS_MAX_SUPPORTED_LUN];
void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);
bool IsValidCBW(uint8_t size, uint8_t *pcbw);
bool IsMeaningfulCBW(uint8_t size, uint8_t *pcbw);
bool IsValidCSW(CommandStatusWrapper *pcsw, CommandBlockWrapperBase *pcbw);
uint8_t ClearEpHalt(uint8_t index);
uint8_t Transaction(CommandBlockWrapper *cbw, uint16_t bsize, void *buf, uint8_t flags);
uint8_t HandleUsbError(uint8_t error, uint8_t index);
uint8_t HandleSCSIError(uint8_t status);
// Additional Initialization Method for Subclasses
@ -247,8 +239,6 @@ protected:
public:
BulkOnly(USB *p);
// Some of these should NOT be public.
uint8_t GetLastUsbError() {
return bLastUsbError;
};
@ -261,11 +251,12 @@ public:
return bTheLUN; // Active LUN
}
boolean WriteProtected(uint8_t lun);
uint8_t MediaCTL(uint8_t lun, uint8_t ctl);
uint8_t Read(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t blocks, uint8_t *buf);
uint8_t Read(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t blocks, USBReadParser *prs);
uint8_t Write(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t blocks, const uint8_t *buf);
uint8_t LockMedia(uint8_t lun, uint8_t lock);
bool LUNIsGood(uint8_t lun);
uint32_t GetCapacity(uint8_t lun);
@ -299,7 +290,15 @@ private:
void CheckMedia();
boolean CheckLUN(uint8_t lun);
uint8_t Page3F(uint8_t lun);
uint8_t LockMedia(uint8_t lun, uint8_t lock);
bool IsValidCBW(uint8_t size, uint8_t *pcbw);
bool IsMeaningfulCBW(uint8_t size, uint8_t *pcbw);
bool IsValidCSW(CommandStatusWrapper *pcsw, CommandBlockWrapperBase *pcbw);
uint8_t ClearEpHalt(uint8_t index);
uint8_t Transaction(CommandBlockWrapper *cbw, uint16_t bsize, void *buf, uint8_t flags);
uint8_t HandleUsbError(uint8_t error, uint8_t index);
uint8_t HandleSCSIError(uint8_t status);
};