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Writing data to and from a USB stick
Diff: USBHostLite/usbhost_ms.c
- Revision:
- 0:5934350323b2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHostLite/usbhost_ms.c Sun Nov 06 15:45:12 2011 +0000 @@ -0,0 +1,455 @@ +/* +************************************************************************************************************** +* NXP USB Host Stack +* +* (c) Copyright 2008, NXP SemiConductors +* (c) Copyright 2008, OnChip Technologies LLC +* All Rights Reserved +* +* www.nxp.com +* www.onchiptech.com +* +* File : usbhost_ms.c +* Programmer(s) : Ravikanth.P +* Version : +* +************************************************************************************************************** +*/ + +/* +************************************************************************************************************** +* INCLUDE HEADER FILES +************************************************************************************************************** +*/ + +#include "usbhost_ms.h" + +/* +************************************************************************************************************** +* GLOBAL VARIABLES +************************************************************************************************************** +*/ + +USB_INT32U MS_BlkSize; + +/* +************************************************************************************************************** +* INITIALIZE MASS STORAGE INTERFACE +* +* Description: This function initializes the mass storage interface +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_Init (USB_INT32U *blkSize, USB_INT32U *numBlks, USB_INT08U *inquiryResult) +{ + USB_INT08U retry; + USB_INT32S rc; + + MS_GetMaxLUN(); /* Get maximum logical unit number */ + retry = 80; + while(retry) { + rc = MS_TestUnitReady(); /* Test whether the unit is ready */ + if (rc == OK) { + break; + } + MS_GetSenseInfo(); /* Get sense information */ + retry--; + } + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + rc = MS_ReadCapacity(numBlks, blkSize); /* Read capacity of the disk */ + MS_BlkSize = *blkSize; // Set global + rc = MS_Inquire (inquiryResult); + return (rc); +} +/* +************************************************************************************************************** +* PARSE THE CONFIGURATION +* +* Description: This function is used to parse the configuration +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_ParseConfiguration (void) +{ + volatile USB_INT08U *desc_ptr; + USB_INT08U ms_int_found; + + + desc_ptr = TDBuffer; + ms_int_found = 0; + + if (desc_ptr[1] != USB_DESCRIPTOR_TYPE_CONFIGURATION) { + return (ERR_BAD_CONFIGURATION); + } + desc_ptr += desc_ptr[0]; + + while (desc_ptr != TDBuffer + ReadLE16U(&TDBuffer[2])) { + + switch (desc_ptr[1]) { + + case USB_DESCRIPTOR_TYPE_INTERFACE: /* If it is an interface descriptor */ + if (desc_ptr[5] == MASS_STORAGE_CLASS && /* check if the class is mass storage */ + desc_ptr[6] == MASS_STORAGE_SUBCLASS_SCSI && /* check if the subclass is SCSI */ + desc_ptr[7] == MASS_STORAGE_PROTOCOL_BO) { /* check if the protocol is Bulk only */ + ms_int_found = 1; + desc_ptr += desc_ptr[0]; /* Move to next descriptor start */ + } + break; + + case USB_DESCRIPTOR_TYPE_ENDPOINT: /* If it is an endpoint descriptor */ + if ((desc_ptr[3] & 0x03) == 0x02) { /* If it is Bulk endpoint */ + if (desc_ptr[2] & 0x80) { /* If it is In endpoint */ + EDBulkIn->Control = 1 | /* USB address */ + ((desc_ptr[2] & 0x7F) << 7) | /* Endpoint address */ + (2 << 11) | /* direction */ + (ReadLE16U(&desc_ptr[4]) << 16); /* MaxPkt Size */ + desc_ptr += desc_ptr[0]; /* Move to next descriptor start */ + } else { /* If it is Out endpoint */ + EDBulkOut->Control = 1 | /* USB address */ + ((desc_ptr[2] & 0x7F) << 7) | /* Endpoint address */ + (1 << 11) | /* direction */ + (ReadLE16U(&desc_ptr[4]) << 16); /* MaxPkt Size */ + desc_ptr += desc_ptr[0]; /* Move to next descriptor start */ + } + } else { /* If it is not bulk end point */ + desc_ptr += desc_ptr[0]; /* Move to next descriptor start */ + } + break; + + default: /* If the descriptor is neither interface nor endpoint */ + desc_ptr += desc_ptr[0]; /* Move to next descriptor start */ + break; + } + } + if (ms_int_found) { + PRINT_Log("Mass Storage device connected\n"); + return (OK); + } else { + PRINT_Log("Not a Mass Storage device\n"); + return (ERR_NO_MS_INTERFACE); + } +} + +/* +************************************************************************************************************** +* GET MAXIMUM LOGICAL UNIT +* +* Description: This function returns the maximum logical unit from the device +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_GetMaxLUN (void) +{ + USB_INT32S rc; + + + rc = Host_CtrlRecv(USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS | USB_RECIPIENT_INTERFACE, + MS_GET_MAX_LUN_REQ, + 0, + 0, + 1, + TDBuffer); + return (rc); +} + +/* +************************************************************************************************************** +* GET SENSE INFORMATION +* +* Description: This function is used to get sense information from the device +* +* Arguments : None +* +* Returns : OK if Success +* ERROR if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_GetSenseInfo (void) +{ + USB_INT32S rc; + + + Fill_MSCommand(0, 0, 0, MS_DATA_DIR_IN, SCSI_CMD_REQUEST_SENSE, 6); + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, 18); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { + rc = ERR_MS_CMD_FAILED; + } + } + } + } + return (rc); +} + +/* +************************************************************************************************************** +* TEST UNIT READY +* +* Description: This function is used to test whether the unit is ready or not +* +* Arguments : None +* +* Returns : OK if Success +* ERROR if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_TestUnitReady (void) +{ + USB_INT32S rc; + + + Fill_MSCommand(0, 0, 0, MS_DATA_DIR_NONE, SCSI_CMD_TEST_UNIT_READY, 6); + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { + rc = ERR_MS_CMD_FAILED; + } + } + } + return (rc); +} + +/* +************************************************************************************************************** +* READ CAPACITY +* +* Description: This function is used to read the capacity of the mass storage device +* +* Arguments : None +* +* Returns : OK if Success +* ERROR if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_ReadCapacity (USB_INT32U *numBlks, USB_INT32U *blkSize) +{ + USB_INT32S rc; + + + Fill_MSCommand(0, 0, 0, MS_DATA_DIR_IN, SCSI_CMD_READ_CAPACITY, 10); + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, 8); + if (rc == OK) { + if (numBlks) + *numBlks = ReadBE32U(&TDBuffer[0]); + if (blkSize) + *blkSize = ReadBE32U(&TDBuffer[4]); + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { + rc = ERR_MS_CMD_FAILED; + } + } + } + } + return (rc); +} + + + +USB_INT32S MS_Inquire (USB_INT08U *response) +{ + USB_INT32S rc; + USB_INT32U i; + + Fill_MSCommand(0, 0, 0, MS_DATA_DIR_IN, SCSI_CMD_INQUIRY, 6); + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, INQUIRY_LENGTH); + if (rc == OK) { + if (response) { + for ( i = 0; i < INQUIRY_LENGTH; i++ ) + *response++ = *TDBuffer++; +#if 0 + MemCpy (response, TDBuffer, INQUIRY_LENGTH); + StrNullTrailingSpace (response->vendorID, SCSI_INQUIRY_VENDORCHARS); + StrNullTrailingSpace (response->productID, SCSI_INQUIRY_PRODUCTCHARS); + StrNullTrailingSpace (response->productRev, SCSI_INQUIRY_REVCHARS); +#endif + } + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { // bCSWStatus byte + rc = ERR_MS_CMD_FAILED; + } + } + } + } + return (rc); +} + +/* +************************************************************************************************************** +* RECEIVE THE BULK DATA +* +* Description: This function is used to receive the bulk data +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_BulkRecv ( USB_INT32U block_number, + USB_INT16U num_blocks, + volatile USB_INT08U *user_buffer) +{ + USB_INT32S rc; + int i; + volatile USB_INT08U *c = user_buffer; + for (i=0;i<MS_BlkSize*num_blocks;i++) + *c++ = 0; + + + Fill_MSCommand(block_number, MS_BlkSize, num_blocks, MS_DATA_DIR_IN, SCSI_CMD_READ_10, 10); + + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, user_buffer, MS_BlkSize * num_blocks); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { + rc = ERR_MS_CMD_FAILED; + } + } + } + } + return (rc); +} + +/* +************************************************************************************************************** +* SEND BULK DATA +* +* Description: This function is used to send the bulk data +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S MS_BulkSend ( USB_INT32U block_number, + USB_INT16U num_blocks, + volatile USB_INT08U *user_buffer) +{ + USB_INT32S rc; + + + Fill_MSCommand(block_number, MS_BlkSize, num_blocks, MS_DATA_DIR_OUT, SCSI_CMD_WRITE_10, 10); + + rc = Host_ProcessTD(EDBulkOut, TD_OUT, TDBuffer, CBW_SIZE); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkOut, TD_OUT, user_buffer, MS_BlkSize * num_blocks); + if (rc == OK) { + rc = Host_ProcessTD(EDBulkIn, TD_IN, TDBuffer, CSW_SIZE); + if (rc == OK) { + if (TDBuffer[12] != 0) { + rc = ERR_MS_CMD_FAILED; + } + } + } + } + return (rc); +} + +/* +************************************************************************************************************** +* FILL MASS STORAGE COMMAND +* +* Description: This function is used to fill the mass storage command +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +void Fill_MSCommand (USB_INT32U block_number, + USB_INT32U block_size, + USB_INT16U num_blocks, + MS_DATA_DIR direction, + USB_INT08U scsi_cmd, + USB_INT08U scsi_cmd_len) +{ + USB_INT32U data_len; + static USB_INT32U tag_cnt = 0; + USB_INT32U cnt; + + + for (cnt = 0; cnt < CBW_SIZE; cnt++) { + TDBuffer[cnt] = 0; + } + switch(scsi_cmd) { + + case SCSI_CMD_TEST_UNIT_READY: + data_len = 0; + break; + case SCSI_CMD_READ_CAPACITY: + data_len = 8; + break; + case SCSI_CMD_REQUEST_SENSE: + data_len = 18; + break; + case SCSI_CMD_INQUIRY: + data_len = 36; + break; + default: + data_len = block_size * num_blocks; + break; + } + WriteLE32U(TDBuffer, CBW_SIGNATURE); + WriteLE32U(&TDBuffer[4], tag_cnt); + WriteLE32U(&TDBuffer[8], data_len); + TDBuffer[12] = (direction == MS_DATA_DIR_NONE) ? 0 : direction; + TDBuffer[14] = scsi_cmd_len; /* Length of the CBW */ + TDBuffer[15] = scsi_cmd; + if ((scsi_cmd == SCSI_CMD_REQUEST_SENSE) + || (scsi_cmd == SCSI_CMD_INQUIRY)) { + TDBuffer[19] = (USB_INT08U)data_len; + } else { + WriteBE32U(&TDBuffer[17], block_number); + } + WriteBE16U(&TDBuffer[22], num_blocks); +}