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106 lines
3.6 KiB
106 lines
3.6 KiB
The GuruPlug's microSD card reader is a USB mass storage device that
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has two logical units (LUNs), i.e., two "SCSI disks". This patch
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adds multi-LUN support to the USB MSD driver.
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See the thread at <http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/85425>.
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--- u-boot/common/usb_storage.c 1970-01-01 01:00:01.000000000 +0100
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+++ u-boot/common/usb_storage.c 2010-10-02 00:38:15.000000000 +0200
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@@ -204,6 +204,22 @@ int usb_stor_info(void)
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return 1;
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}
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+static unsigned int usb_get_max_lun(struct us_data *us)
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+{
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+ int len;
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+ unsigned char result;
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+ len = usb_control_msg(us->pusb_dev,
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+ usb_rcvctrlpipe(us->pusb_dev, 0),
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+ US_BBB_GET_MAX_LUN,
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+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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+ 0, us->ifnum,
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+ &result, sizeof(result),
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+ USB_CNTL_TIMEOUT * 5);
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+ USB_STOR_PRINTF("Get Max LUN -> len = %i, result = %i\n",
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+ len, (int) result);
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+ return (len > 0) ? result : 0;
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+}
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+
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/*******************************************************************************
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* scan the usb and reports device info
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* to the user if mode = 1
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@@ -241,13 +257,21 @@ int usb_stor_scan(int mode)
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break; /* no more devices avaiable */
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if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
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- /* ok, it is a storage devices
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- * get info and fill it in
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- */
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- if (usb_stor_get_info(dev, &usb_stor[usb_max_devs],
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- &usb_dev_desc[usb_max_devs]) == 1)
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+ /* OK, it's a storage device. Iterate over its LUNs
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+ * and populate `usb_dev_desc'. */
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+ int lun, max_lun, start = usb_max_devs;
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+
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+ max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
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+ for (lun = 0;
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+ lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
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+ lun++) {
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+ usb_dev_desc[usb_max_devs].lun = lun;
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+ if (usb_stor_get_info(dev, &usb_stor[start],
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+ &usb_dev_desc[usb_max_devs]) == 1) {
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usb_max_devs++;
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}
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+ }
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+ }
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/* if storage device */
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if (usb_max_devs == USB_MAX_STOR_DEV) {
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printf("max USB Storage Device reached: %d stopping\n",
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@@ -882,6 +906,7 @@ static int usb_inquiry(ccb *srb, struct
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do {
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_INQUIRY;
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+ srb->cmd[1] = srb->lun << 5;
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srb->cmd[4] = 36;
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srb->datalen = 36;
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srb->cmdlen = 12;
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@@ -905,6 +930,7 @@ static int usb_request_sense(ccb *srb, s
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ptr = (char *)srb->pdata;
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_REQ_SENSE;
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+ srb->cmd[1] = srb->lun << 5;
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srb->cmd[4] = 18;
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srb->datalen = 18;
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srb->pdata = &srb->sense_buf[0];
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@@ -924,6 +950,7 @@ static int usb_test_unit_ready(ccb *srb,
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do {
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_TST_U_RDY;
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+ srb->cmd[1] = srb->lun << 5;
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srb->datalen = 0;
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srb->cmdlen = 12;
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if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
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@@ -943,6 +970,7 @@ static int usb_read_capacity(ccb *srb, s
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do {
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_RD_CAPAC;
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+ srb->cmd[1] = srb->lun << 5;
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srb->datalen = 8;
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srb->cmdlen = 12;
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if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
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@@ -957,6 +985,7 @@ static int usb_read_10(ccb *srb, struct
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{
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_READ10;
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+ srb->cmd[1] = srb->lun << 5;
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srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
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srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
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srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
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@@ -973,6 +1002,7 @@ static int usb_write_10(ccb *srb, struct
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{
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memset(&srb->cmd[0], 0, 12);
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srb->cmd[0] = SCSI_WRITE10;
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+ srb->cmd[1] = srb->lun << 5;
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srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
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srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
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srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
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