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msc device: correct handling tud_msc_write10_cb returned value 

separate proc write10 and read10
This commit is contained in:
hathach 2018-06-07 12:10:07 +07:00
parent 8f810cece9
commit fa2e043126
1 changed files with 83 additions and 31 deletions
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114
tinyusb/class/msc/msc_device.c
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@ -82,7 +82,8 @@ CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN static uint8_t _mscd_buf[CFG_TUD_MSC_BUF
//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
static void proc_read10_write10(uint8_t rhport, mscd_interface_t* p_msc);
static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc);
static void proc_write10_cmd(uint8_t rhport, mscd_interface_t* p_msc);
static inline uint32_t rdwr10_get_lba(uint8_t const command[])
{
@ -210,9 +211,13 @@ tusb_error_t mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, u
p_msc->data_len = p_cbw->xfer_bytes;
p_msc->xferred_len = 0;
if ( (SCSI_CMD_READ_10 == p_cbw->command[0]) || (SCSI_CMD_WRITE_10 == p_cbw->command[0]) )
if (SCSI_CMD_READ_10 == p_cbw->command[0])
{
proc_read10_write10(rhport, p_msc);
proc_read10_cmd(rhport, p_msc);
}
else if (SCSI_CMD_WRITE_10 == p_cbw->command[0])
{
proc_write10_cmd(rhport, p_msc);
}
else
{
@ -260,19 +265,51 @@ tusb_error_t mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, u
// OUT transfer, invoke callback if needed
if ( !BIT_TEST_(p_cbw->dir, 7) )
{
if ( SCSI_CMD_WRITE_10 == p_cbw->command[0] )
{
uint32_t lba = rdwr10_get_lba(p_cbw->command);
tud_msc_write10_cb(rhport, p_cbw->lun, lba, p_msc->xferred_len, _mscd_buf, xferred_bytes);
}
else
if ( SCSI_CMD_WRITE_10 != p_cbw->command[0] )
{
p_csw->status = (tud_msc_scsi_cb(rhport, p_cbw->lun, p_cbw->command, _mscd_buf, p_msc->data_len) >= 0 ) ? MSC_CSW_STATUS_PASSED : MSC_CSW_STATUS_FAILED;
}
else
{
uint32_t lba = rdwr10_get_lba(p_cbw->command);
// Application can consume smaller bytes
int32_t nbytes = tud_msc_write10_cb(rhport, p_cbw->lun, lba, p_msc->xferred_len, _mscd_buf, xferred_bytes);
if ( nbytes < 0 )
{
// negative means error -> skip to status phase, status in CSW set to failed
p_csw->data_residue = p_cbw->xfer_bytes - p_msc->xferred_len;
p_csw->status = MSC_CSW_STATUS_FAILED;
p_msc->stage = MSC_STAGE_STATUS;
break;
}else
{
// Application consume less than what we got (including zero)
if ( nbytes < xferred_bytes )
{
if ( nbytes > 0 )
{
p_msc->xferred_len += nbytes;
memmove(_mscd_buf, _mscd_buf+nbytes, xferred_bytes-nbytes);
}
// simulate an transfer complete with adjusted params
dcd_xfer_complete(rhport, p_msc->ep_out, xferred_bytes-nbytes, true);
return TUSB_ERROR_NONE; // skip the rest
}
else
{
// Application consume all bytes in our buffer
// Nothing to do, process with normal flow
}
}
}
}
/*------------- Prepare for DATA transfer if not complete yet -------------*/
// Accumulate data so far
p_msc->xferred_len += xferred_bytes;
if ( p_msc->xferred_len >= p_msc->data_len )
@ -282,10 +319,15 @@ tusb_error_t mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, u
}
else
{
if ( (SCSI_CMD_READ_10 == p_cbw->command[0]) || (SCSI_CMD_WRITE_10 == p_cbw->command[0]) )
// READ10 & WRITE10 Can be executed with large bulk of data e.g write 8K bytes (several flash write)
// We break it into multiple smaller command whose data size is up to CFG_TUD_MSC_BUFSIZE
if (SCSI_CMD_READ_10 == p_cbw->command[0])
{
// Can be executed several times e.g write 8K bytes (several flash write)
proc_read10_write10(rhport, p_msc);
proc_read10_cmd(rhport, p_msc);
}
else if (SCSI_CMD_WRITE_10 == p_cbw->command[0])
{
proc_write10_cmd(rhport, p_msc);
}else
{
// No other command take more than one transfer yet -> unlikely error
@ -324,42 +366,52 @@ tusb_error_t mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, u
return TUSB_ERROR_NONE;
}
static void proc_read10_write10(uint8_t rhport, mscd_interface_t* p_msc)
static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc)
{
msc_cbw_t const * p_cbw = &p_msc->cbw;
msc_csw_t * p_csw = &p_msc->csw;
uint8_t const ep_data = BIT_TEST_(p_cbw->dir, 7) ? p_msc->ep_in : p_msc->ep_out;
// LBA and Block count are in Big Endian. Use memcpy first to prevent mis-aligned access
uint32_t lba = rdwr10_get_lba(p_cbw->command);
uint16_t block_count = rdwr10_get_blockcount(p_cbw->command);
int32_t xfer_bytes = (int32_t) min32_of(sizeof(_mscd_buf), p_cbw->xfer_bytes-p_msc->xferred_len);
// remaining bytes capped at class buffer
int32_t nbytes = (int32_t) min32_of(sizeof(_mscd_buf), p_cbw->xfer_bytes-p_msc->xferred_len);
// Write10 callback will be called later when usb transfer complete
if (SCSI_CMD_READ_10 == p_cbw->command[0])
{
xfer_bytes = tud_msc_read10_cb (rhport, p_cbw->lun, lba, p_msc->xferred_len, _mscd_buf, (uint32_t) xfer_bytes);
}
// Application can consume smaller bytes
nbytes = tud_msc_read10_cb (rhport, p_cbw->lun, lba, p_msc->xferred_len, _mscd_buf, (uint32_t) nbytes);
if ( xfer_bytes < 0 )
if ( nbytes < 0 )
{
// negative is error -> pipe is stalled & status in CSW set to failed
// negative means error -> pipe is stalled & status in CSW set to failed
p_csw->data_residue = p_cbw->xfer_bytes - p_msc->xferred_len;
p_csw->status = MSC_CSW_STATUS_FAILED;
dcd_edpt_stall(rhport, ep_data);
dcd_edpt_stall(rhport, p_msc->ep_in);
}
else if ( xfer_bytes == 0 )
else if ( nbytes == 0 )
{
// zero is not ready -> try again later by simulate an transfer complete
dcd_xfer_complete(rhport, ep_data, 0, true);
// zero means not ready -> try again later by simulate an transfer complete
dcd_xfer_complete(rhport, p_msc->ep_in, 0, true);
}
else
{
TU_ASSERT( dcd_edpt_xfer(rhport, ep_data, _mscd_buf, xfer_bytes), );
TU_ASSERT( dcd_edpt_xfer(rhport, p_msc->ep_in, _mscd_buf, nbytes), );
}
}
static void proc_write10_cmd(uint8_t rhport, mscd_interface_t* p_msc)
{
msc_cbw_t const * p_cbw = &p_msc->cbw;
msc_csw_t * p_csw = &p_msc->csw;
uint32_t lba = rdwr10_get_lba(p_cbw->command);
uint16_t block_count = rdwr10_get_blockcount(p_cbw->command);
// remaining bytes capped at class buffer
int32_t nbytes = (int32_t) min32_of(sizeof(_mscd_buf), p_cbw->xfer_bytes-p_msc->xferred_len);
// Write10 callback will be called later when usb transfer complete
TU_ASSERT( dcd_edpt_xfer(rhport, p_msc->ep_out, _mscd_buf, nbytes), );
}
#endif