C++ USB_STOR_PRINTF函数代码示例

/* FIXME: this reset function doesn't really reset the port, and it
 * should. Actually it should probably do what it's doing here, and
 * reset the port physically
 */
static int usb_stor_CB_reset(struct us_data *us)
{
	unsigned char cmd[12];
	int result;

	USB_STOR_PRINTF("CB_reset\n");
	memset(cmd, 0xff, sizeof(cmd));
	cmd[0] = SCSI_SEND_DIAG;
	cmd[1] = 4;
	result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
				 US_CBI_ADSC,
				 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
				 0, us->ifnum, cmd, sizeof(cmd),
				 USB_CNTL_TIMEOUT * 5);

	/* long wait for reset */
	mdelay(1500);
	USB_STOR_PRINTF("CB_reset result %d: status %lX"
			" clearing endpoint halt\n", result,
			us->pusb_dev->status);
	usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
	usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));

	USB_STOR_PRINTF("CB_reset done\n");
	return 0;
}

int usb_stor_CB_transport(ccb *srb, struct us_data *us)
{
    int result,status;
    ccb *psrb;
    ccb reqsrb;
    int retry,notready;

    psrb=&reqsrb;
    status=USB_STOR_TRANSPORT_GOOD;
    retry=0;
    notready=0;
    /* issue the command */
do_retry:
    result=usb_stor_CB_comdat(srb,us);
    USB_STOR_PRINTF("command / Data returned %d, status %X\n",result,us->pusb_dev->status);
    /* if this is an CBI Protocol, get IRQ */
    if(us->protocol==US_PR_CBI) {
        status=usb_stor_CBI_get_status(srb,us);
        /* if the status is error, report it */
        if(status==USB_STOR_TRANSPORT_ERROR) {
            USB_STOR_PRINTF(" USB CBI Command Error\n");
            return status;
        }
        srb->sense_buf[12]=(unsigned char)(us->ip_data>>8);
        srb->sense_buf[13]=(unsigned char)(us->ip_data&0xff);
        if(!us->ip_data) {
            /* if the status is good, report it */
            if(status==USB_STOR_TRANSPORT_GOOD) {
                USB_STOR_PRINTF(" USB CBI Command Good\n");
                return status;
            }
        }
    }

/*********************************************************************************
 * scan the usb and reports device info
 * to the user if mode = 1
 * returns current device or -1 if no
 */
int usb_stor_scan(int mode)
{
    unsigned char i;
    struct usb_device *dev;
    USB_STOR_PRINTF("%s\n ",__FUNCTION__);

    /* GJ */
    memset(usb_stor_buf, 0, sizeof(usb_stor_buf));

    if(mode==1) {
        printf("scanning bus for storage devices...\n");
    }
    usb_disable_asynch(1); /* asynch transfer not allowed */

    for(i=0; i<USB_MAX_STOR_DEV; i++) {
        memset(&usb_dev_desc[i],0,sizeof(block_dev_desc_t));
        usb_dev_desc[i].target=0xff;
        usb_dev_desc[i].if_type=IF_TYPE_USB;
        usb_dev_desc[i].dev=i;
        usb_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
        usb_dev_desc[i].block_read=usb_stor_read;
    }

    usb_max_devs=0;
    for(i=0; i<USB_MAX_DEVICE; i++) {
        dev=usb_get_dev_index(i); /* get device */
        USB_STOR_PRINTF("i=%d\n",i);
        if(dev==NULL) {
            break; /* no more devices avaiable */
        }
        if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
            /* OK, it's a storage device.  Iterate over its LUNs
             * and populate `usb_dev_desc'.
             */
            int lun, max_lun, start = usb_max_devs;

            max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
            for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV; lun++) {
                usb_dev_desc[usb_max_devs].lun = lun;
                if (usb_stor_get_info(dev, &usb_stor[start],
                                      &usb_dev_desc[usb_max_devs]) == 1) {
                    usb_max_devs++;
                }
            }
        }
        /* if storage device */
        if(usb_max_devs==USB_MAX_STOR_DEV) {
            printf("max USB Storage Device reached: %d stopping\n",usb_max_devs);
            break;
        }
    } /* for */

    usb_disable_asynch(0); /* asynch transfer allowed */
    printf("%d Storage Device(s) found\n", usb_max_devs);
    if(usb_max_devs>0)
        return 0;
    else
        return-1;
}

static unsigned int usb_get_max_lun(struct us_data *us)
{


    int len;
    unsigned char result;
    USB_STOR_PRINTF("%s\n ",__FUNCTION__);
    len = usb_control_msg(us->pusb_dev,
                          usb_rcvctrlpipe(us->pusb_dev, 0),
                          US_BBB_GET_MAX_LUN,
                          USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
                          0, us->ifnum,
                          &result, sizeof(result),
                          1);
    USB_STOR_PRINTF("Get Max LUN -> len = %i, result = %i\n", len, (int) result);
    return (len > 0) ? result : 0;
}

/*
 * Set up the command for a BBB device. Note that the actual SCSI
 * command is copied into cbw.CBWCDB.
 */
static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
{
	int result;
	int actlen;
	int dir_in;
	unsigned int pipe;
	ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw_buf, 1);
	umass_bbb_cbw_t *cbw = (umass_bbb_cbw_t *)KSEG1ADDR(cbw_buf);

	dir_in = US_DIRECTION(srb->cmd[0]);

#ifdef BBB_COMDAT_TRACE
	printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
		dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
		srb->pdata);
	if (srb->cmdlen) {
		for (result = 0; result < srb->cmdlen; result++)
			printf("cmd[%d] %#x ", result, srb->cmd[result]);
		printf("\n");
	}
#endif
	/* sanity checks */
	if (!(srb->cmdlen <= CBWCDBLENGTH)) {
		USB_STOR_PRINTF("usb_stor_BBB_comdat:cmdlen too large\n");
		return -1;
	}

	/* always OUT to the ep */
	pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);

	cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
	cbw->dCBWTag = cpu_to_le32(CBWTag++);
	cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
	cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
	cbw->bCBWLUN = srb->lun;
	cbw->bCDBLength = srb->cmdlen;
	/* copy the command data into the CBW command data buffer */
	/* DST SRC LEN!!! */
	memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
	result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
			      &actlen, USB_CNTL_TIMEOUT * 5);
	if (result < 0)
		USB_STOR_PRINTF("usb_stor_BBB_comdat:usb_bulk_msg error\n");
	return result;
}

/*******************************************************************************
 * scan the usb and reports device info
 * to the user if mode = 1
 * returns current device or -1 if no
 */
int usb_stor_scan(int mode)
{
	unsigned char i;
	struct usb_device *dev;

	/* GJ */
	memset(usb_stor_buf, 0, sizeof(usb_stor_buf));

	if (mode == 1)
		printf("       scanning bus for storage devices... ");

	usb_disable_asynch(1); /* asynch transfer not allowed */

	for (i = 0; i < USB_MAX_STOR_DEV; i++) {
		memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
		usb_dev_desc[i].target = 0xff;
		usb_dev_desc[i].if_type = IF_TYPE_USB;
		usb_dev_desc[i].dev = i;
		usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
		usb_dev_desc[i].block_read = usb_stor_read;
		usb_dev_desc[i].block_write = usb_stor_write;
	}

	usb_max_devs = 0;
	for (i = 0; i < USB_MAX_DEVICE; i++) {
		dev = usb_get_dev_index(i); /* get device */
		USB_STOR_PRINTF("i=%d\n", i);
		if (dev == NULL)
			break; /* no more devices avaiable */

		if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
			/* ok, it is a storage devices
			 * get info and fill it in
			 */
			if (usb_stor_get_info(dev, &usb_stor[usb_max_devs],
						&usb_dev_desc[usb_max_devs]) == 1)
				usb_max_devs++;
		}
		/* if storage device */
		if (usb_max_devs == USB_MAX_STOR_DEV) {
			printf("max USB Storage Device reached: %d stopping\n",
				usb_max_devs);
			break;
		}
	} /* for */

	usb_disable_asynch(0); /* asynch transfer allowed */
	printf("%d Storage Device(s) found\n", usb_max_devs);
	if (usb_max_devs > 0)
		return 0;
	return -1;
}

static unsigned int usb_get_max_lun(struct us_data *us)
{
	int len;
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
	len = usb_control_msg(us->pusb_dev,
			      usb_rcvctrlpipe(us->pusb_dev, 0),
			      US_BBB_GET_MAX_LUN,
			      USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
			      0, us->ifnum,
			      result, sizeof(char),
			      USB_CNTL_TIMEOUT * 5);
	USB_STOR_PRINTF("Get Max LUN -> len = %i, result = %i\n",
			len, (int) *result);
	return (len > 0) ? *result : 0;
}

/* FIXME: we also need a CBI_command which sets up the completion
 * interrupt, and waits for it
 */
int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
{
    int result = 0;
    int dir_in,retry;
    unsigned int pipe;
    unsigned long status;

    retry=5;
    dir_in=US_DIRECTION(srb->cmd[0]);

    if(dir_in)
        pipe=usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
    else
        pipe=usb_sndbulkpipe(us->pusb_dev, us->ep_out);
    while(retry--) {
        USB_STOR_PRINTF("CBI gets a command: Try %d\n",5-retry);
#ifdef USB_STOR_DEBUG
        usb_show_srb(srb);
#endif
        /* let's send the command via the control pipe */
        result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
                                 US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                                 0, us->ifnum,
                                 srb->cmd, srb->cmdlen, USB_CNTL_TIMEOUT*5);
        USB_STOR_PRINTF("CB_transport: control msg returned %d, status %X\n",result,us->pusb_dev->status);
        /* check the return code for the command */
        if (result < 0) {
            if(us->pusb_dev->status & USB_ST_STALLED) {
                status=us->pusb_dev->status;
                USB_STOR_PRINTF(" stall during command found, clear pipe\n");
                usb_clear_halt(us->pusb_dev,  usb_sndctrlpipe(us->pusb_dev,0));
                us->pusb_dev->status=status;
            }
            USB_STOR_PRINTF(" error during command %02X Stat = %X\n",srb->cmd[0],us->pusb_dev->status);
            return result;
        }
        /* transfer the data payload for this command, if one exists*/

        USB_STOR_PRINTF("CB_transport: control msg returned %d, direction is %s to go 0x%lx\n",result,dir_in ? "IN" : "OUT",srb->datalen);
        if (srb->datalen) {
            result = us_one_transfer(us, pipe, (char *)srb->pdata,srb->datalen);
            USB_STOR_PRINTF("CBI attempted to transfer data, result is %d status %lX, len %d\n", result,us->pusb_dev->status,us->pusb_dev->act_len);
            if(!(us->pusb_dev->status & USB_ST_NAK_REC))
                break;
        } /* if (srb->datalen) */
        else
            break;
    }
    /* return result */

    return result;
}

int usb_stor_CBI_get_status (ccb * srb, struct us_data *us)
{
    int timeout;

    us->ip_wanted = 1;
    submit_int_msg (us->pusb_dev, us->irqpipe,
                    (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
    timeout = 1000;
    while (timeout--) {
        if ((volatile int *) us->ip_wanted == 0)
            break;
        wait_ms (10);
    }
    if (us->ip_wanted) {
        printf ("	Did not get interrupt on CBI\n");
        us->ip_wanted = 0;
        return USB_STOR_TRANSPORT_ERROR;
    }
    USB_STOR_PRINTF
    ("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
     us->ip_data, us->pusb_dev->irq_act_len,
     us->pusb_dev->irq_status);
    /* UFI gives us ASC and ASCQ, like a request sense */
    if (us->subclass == US_SC_UFI) {
        if (srb->cmd[0] == SCSI_REQ_SENSE ||
                srb->cmd[0] == SCSI_INQUIRY)
            return USB_STOR_TRANSPORT_GOOD; /* Good */
        else if (us->ip_data)
            return USB_STOR_TRANSPORT_FAILED;
        else
            return USB_STOR_TRANSPORT_GOOD;
    }
    /* otherwise, we interpret the data normally */
    switch (us->ip_data) {
    case 0x0001:
        return USB_STOR_TRANSPORT_GOOD;
    case 0x0002:
        return USB_STOR_TRANSPORT_FAILED;
    default:
        return USB_STOR_TRANSPORT_ERROR;
    }			/* switch */
    return USB_STOR_TRANSPORT_ERROR;
}

/*
 * Set up the command for a BBB device. Note that the actual SCSI
 * command is copied into cbw.CBWCDB.
 */
int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
{
    int result;
    int actlen;
    int dir_in;
    unsigned int pipe;
    umass_bbb_cbw_t cbw;

    dir_in = US_DIRECTION(srb->cmd[0]);

#ifdef BBB_COMDAT_TRACE
    printf("dir %d lun %d cmdlen %d cmd %p datalen %d pdata %p\n", dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen, srb->pdata);
    if (srb->cmdlen) {
        for(result = 0; result < srb->cmdlen; result++)
            printf("cmd[%d] %#x ", result, srb->cmd[result]);
        printf("\n");
    }
    printf(" us->ep_in %d us->ep_out %d dir_in %d \n", us->ep_in, us->ep_out,dir_in);

#endif
    /* sanity checks */
    if (!(srb->cmdlen <= CBWCDBLENGTH)) {
        USB_STOR_PRINTF("usb_stor_BBB_comdat:cmdlen too large\n");
        return -1;
    }

    /* always OUT to the ep */
    pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);

    cbw.dCBWSignature = swap_32(CBWSIGNATURE);
    cbw.dCBWTag = swap_32(CBWTag++);
    cbw.dCBWDataTransferLength = swap_32(srb->datalen);
    cbw.bCBWFlags = (dir_in? CBWFLAGS_IN : CBWFLAGS_OUT);
    cbw.bCBWLUN = srb->lun;
    cbw.bCDBLength = srb->cmdlen;
    /* copy the command data into the CBW command data buffer */
    /* DST SRC LEN!!! */
    memcpy(cbw.CBWCDB, srb->cmd, 0x10);
    result = usb_bulk_msg(us->pusb_dev, pipe, &cbw, UMASS_BBB_CBW_SIZE, &actlen, USB_CNTL_TIMEOUT);//Charles

    return 0 ;
}

int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
{
    int result, retry;
    int dir_in;
    int actlen, data_actlen;
    unsigned int pipe, pipein, pipeout;
#ifdef BBB_XPORT_TRACE
    unsigned char *ptr;
    int index;
#endif

    dir_in = US_DIRECTION(srb->cmd[0]);

    /* COMMAND phase */
    USB_STOR_PRINTF("COMMAND phase\n");
    result = usb_stor_BBB_comdat(srb, us);
    if (result < 0) {
        USB_STOR_PRINTF("failed to send CBW status %ld\n",
                        us->pusb_dev->status);
        usb_stor_BBB_reset(us);
        return USB_STOR_TRANSPORT_FAILED;
    }
    pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
    pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
    /* DATA phase + error handling */
    data_actlen = 0;
    /* no data, go immediately to the STATUS phase */
    if (srb->datalen == 0)
        goto st;
    USB_STOR_PRINTF("DATA phase\n");
    if (dir_in)
        pipe = pipein;
    else
        pipe = pipeout;

    result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen, &data_actlen, USB_CNTL_TIMEOUT*5);
    /* special handling of STALL in DATA phase */
    if((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
        USB_STOR_PRINTF("DATA:stall\n");
        /* clear the STALL on the endpoint */
        result = usb_stor_BBB_clear_endpt_stall(us, dir_in? us->ep_in : us->ep_out);
        if (result >= 0)
            /* continue on to STATUS phase */
            goto st;
    }
    if (result < 0) {
        USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
                        us->pusb_dev->status);
        usb_stor_BBB_reset(us);
        return USB_STOR_TRANSPORT_FAILED;
    }
#ifdef BBB_XPORT_TRACE
    for (index = 0; index < data_actlen; index++)
        printf("pdata[%d] %#x ", index, srb->pdata[index]);
    printf("\n");
#endif
    /* STATUS phase + error handling */
st:
    retry = 0;
again:
    USB_STOR_PRINTF("STATUS phase\n");

    result = usb_bulk_msg(us->pusb_dev, pipein, &csw, UMASS_BBB_CSW_SIZE,
                          &actlen, USB_CNTL_TIMEOUT*5);

    /* special handling of STALL in STATUS phase */
    if((result < 0) && (retry < 1) && (us->pusb_dev->status & USB_ST_STALLED)) {
        USB_STOR_PRINTF("STATUS:stall\n");
        /* clear the STALL on the endpoint */
        result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
        if (result >= 0 && (retry++ < 1))
            /* do a retry */
            goto again;
    }
    if (result < 0) {
        USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
                        us->pusb_dev->status);
        usb_stor_BBB_reset(us);
        return USB_STOR_TRANSPORT_FAILED;
    }
#ifdef BBB_XPORT_TRACE
    ptr = (unsigned char *)&csw;
    for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
        printf("ptr[%d] %#x ", index, ptr[index]);
    printf("\n");
#endif
    /* misuse pipe to get the residue */
    pipe = swap_32(csw.dCSWDataResidue);
    if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
        pipe = srb->datalen - data_actlen;
    if (CSWSIGNATURE != swap_32(csw.dCSWSignature)) {
        USB_STOR_PRINTF("!CSWSIGNATURE\n");
        usb_stor_BBB_reset(us);
        return USB_STOR_TRANSPORT_FAILED;
    } else if ((CBWTag - 1) != swap_32(csw.dCSWTag)) {
        USB_STOR_PRINTF("!Tag\n");
        usb_stor_BBB_reset(us);
        return USB_STOR_TRANSPORT_FAILED;
    } else if (csw.bCSWStatus > CSWSTATUS_PHASE) {
        USB_STOR_PRINTF(">PHASE\n");
//.........这里部分代码省略.........

static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
{
    int max_size;
    int this_xfer;
    int result;
    int partial;
    int maxtry;
    int stat;

    /* determine the maximum packet size for these transfers */
    max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;

    /* while we have data left to transfer */
    while (length) {

        /* calculate how long this will be -- maximum or a remainder */
        this_xfer = length > max_size ? max_size : length;
        length -= this_xfer;

        /* setup the retry counter */
        maxtry = 10;

        /* set up the transfer loop */
        do {
            /* transfer the data */
            USB_STOR_PRINTF("Bulk xfer 0x%x(%d) try #%d\n",
                            (unsigned int)buf, this_xfer, 11 - maxtry);
            result = usb_bulk_msg(us->pusb_dev, pipe, buf,
                                  this_xfer, &partial, USB_CNTL_TIMEOUT*5);
            USB_STOR_PRINTF("bulk_msg returned %d xferred %d/%d\n",
                            result, partial, this_xfer);
            if(us->pusb_dev->status!=0) {
                /* if we stall, we need to clear it before we go on */
#ifdef USB_STOR_DEBUG
                display_int_status(us->pusb_dev->status);
#endif
                if (us->pusb_dev->status & USB_ST_STALLED) {
                    USB_STOR_PRINTF("stalled ->clearing endpoint halt for pipe 0x%x\n", pipe);
                    stat = us->pusb_dev->status;
                    usb_clear_halt(us->pusb_dev, pipe);
                    us->pusb_dev->status=stat;
                    if(this_xfer == partial) {
                        USB_STOR_PRINTF("bulk transferred with error %X, but data ok\n",us->pusb_dev->status);
                        return 0;
                    }
                    else
                        return result;
                }
                if (us->pusb_dev->status & USB_ST_NAK_REC) {
                    USB_STOR_PRINTF("Device NAKed bulk_msg\n");
                    return result;
                }
                if(this_xfer == partial) {
                    USB_STOR_PRINTF("bulk transferred with error %d, but data ok\n",us->pusb_dev->status);
                    return 0;
                }
                /* if our try counter reaches 0, bail out */
                USB_STOR_PRINTF("bulk transferred with error %d, data %d\n",us->pusb_dev->status,partial);
                if (!maxtry--)
                    return result;
            }
            /* update to show what data was transferred */
            this_xfer -= partial;
            buf += partial;
            /* continue until this transfer is done */
        } while ( this_xfer );
    }

    /* if we get here, we're done and successful */
    return 0;
}