diff options
Diffstat (limited to 'common/usb_storage.c')
| -rw-r--r-- | common/usb_storage.c | 64 |
1 files changed, 45 insertions, 19 deletions
diff --git a/common/usb_storage.c b/common/usb_storage.c index df0b057308..a57570b73f 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -98,19 +98,9 @@ struct us_data { struct scsi_cmd *srb; /* current srb */ trans_reset transport_reset; /* reset routine */ trans_cmnd transport; /* transport routine */ + unsigned short max_xfer_blk; /* maximum transfer blocks */ }; -#ifdef CONFIG_USB_EHCI_HCD -/* - * The U-Boot EHCI driver can handle any transfer length as long as there is - * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are - * limited to 65535 blocks. - */ -#define USB_MAX_XFER_BLK 65535 -#else -#define USB_MAX_XFER_BLK 20 -#endif - #ifndef CONFIG_BLK static struct us_data usb_stor[USB_MAX_STOR_DEV]; #endif @@ -949,6 +939,38 @@ do_retry: return USB_STOR_TRANSPORT_FAILED; } +static void usb_stor_set_max_xfer_blk(struct usb_device *udev, + struct us_data *us) +{ + unsigned short blk; + size_t __maybe_unused size; + int __maybe_unused ret; + +#ifndef CONFIG_DM_USB +#ifdef CONFIG_USB_EHCI_HCD + /* + * The U-Boot EHCI driver can handle any transfer length as long as + * there is enough free heap space left, but the SCSI READ(10) and + * WRITE(10) commands are limited to 65535 blocks. + */ + blk = USHRT_MAX; +#else + blk = 20; +#endif +#else + ret = usb_get_max_xfer_size(udev, (size_t *)&size); + if (ret < 0) { + /* unimplemented, let's use default 20 */ + blk = 20; + } else { + if (size > USHRT_MAX * 512) + blk = USHRT_MAX; + blk = size / 512; + } +#endif + + us->max_xfer_blk = blk; +} static int usb_inquiry(struct scsi_cmd *srb, struct us_data *ss) { @@ -1150,12 +1172,12 @@ static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr, /* XXX need some comment here */ retry = 2; srb->pdata = (unsigned char *)buf_addr; - if (blks > USB_MAX_XFER_BLK) - smallblks = USB_MAX_XFER_BLK; + if (blks > ss->max_xfer_blk) + smallblks = ss->max_xfer_blk; else smallblks = (unsigned short) blks; retry_it: - if (smallblks == USB_MAX_XFER_BLK) + if (smallblks == ss->max_xfer_blk) usb_show_progress(); srb->datalen = block_dev->blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; @@ -1178,7 +1200,7 @@ retry_it: start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ - if (blkcnt >= USB_MAX_XFER_BLK) + if (blkcnt >= ss->max_xfer_blk) debug("\n"); return blkcnt; } @@ -1236,12 +1258,12 @@ static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr, */ retry = 2; srb->pdata = (unsigned char *)buf_addr; - if (blks > USB_MAX_XFER_BLK) - smallblks = USB_MAX_XFER_BLK; + if (blks > ss->max_xfer_blk) + smallblks = ss->max_xfer_blk; else smallblks = (unsigned short) blks; retry_it: - if (smallblks == USB_MAX_XFER_BLK) + if (smallblks == ss->max_xfer_blk) usb_show_progress(); srb->datalen = block_dev->blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; @@ -1263,7 +1285,7 @@ retry_it: PRIxPTR "\n", start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ - if (blkcnt >= USB_MAX_XFER_BLK) + if (blkcnt >= ss->max_xfer_blk) debug("\n"); return blkcnt; @@ -1384,6 +1406,10 @@ int usb_storage_probe(struct usb_device *dev, unsigned int ifnum, ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe); dev->irq_handle = usb_stor_irq; } + + /* Set the maximum transfer size per host controller setting */ + usb_stor_set_max_xfer_blk(dev, ss); + dev->privptr = (void *)ss; return 1; } |