?? usbhost_ms.c
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/*
**************************************************************************************************************
* 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 (void)
{
USB_INT08U retry;
USB_INT32S rc;
MS_GetMaxLUN(); /* Get maximum logical unit number */
retry = 20;
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(); /* Read capacity of the disk */
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 + *((USB_INT16U *) &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 (void)
{
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) {
MS_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);
}
/*
**************************************************************************************************************
* 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;
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;
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) {
TDBuffer[19] = (USB_INT08U)data_len;
} else {
WriteBE32U(&TDBuffer[17], block_number);
}
WriteBE16U(&TDBuffer[22], num_blocks);
}
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