diff options
Diffstat (limited to 'common/usb_storage.c')
| -rw-r--r-- | common/usb_storage.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/common/usb_storage.c b/common/usb_storage.c index faad23706..bdc306f58 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -150,12 +150,17 @@ struct us_data { unsigned int irqpipe; /* pipe for release_irq */ unsigned char irqmaxp; /* max packed for irq Pipe */ unsigned char irqinterval; /* Intervall for IRQ Pipe */ - unsigned long max_xfer_blk; /* Max blocks per xfer */ ccb *srb; /* current srb */ trans_reset transport_reset; /* reset routine */ trans_cmnd transport; /* transport routine */ }; +/* + * The U-Boot EHCI driver cannot handle more than 5 page aligned buffers + * of 4096 bytes in a transfer without running itself out of qt_buffers + */ +#define USB_MAX_XFER_BLK(start, blksz) (((4096 * 5) - (start % 4096)) / blksz) + static struct us_data usb_stor[USB_MAX_STOR_DEV]; @@ -1041,7 +1046,7 @@ static void usb_bin_fixup(struct usb_device_descriptor descriptor, unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, void *buffer) { - unsigned long start, blks, buf_addr; + unsigned long start, blks, buf_addr, max_xfer_blk; unsigned short smallblks; struct usb_device *dev; struct us_data *ss; @@ -1083,12 +1088,14 @@ unsigned long usb_stor_read(int device, unsigned long blknr, /* XXX need some comment here */ retry = 2; srb->pdata = (unsigned char *)buf_addr; - if (blks > ss->max_xfer_blk) - smallblks = ss->max_xfer_blk; + max_xfer_blk = USB_MAX_XFER_BLK(buf_addr, + usb_dev_desc[device].blksz); + if (blks > max_xfer_blk) + smallblks = (unsigned short) max_xfer_blk; else smallblks = (unsigned short) blks; retry_it: - if (smallblks == ss->max_xfer_blk) + if (smallblks == max_xfer_blk) usb_show_progress(); srb->datalen = usb_dev_desc[device].blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; @@ -1109,7 +1116,7 @@ retry_it: start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ - if (blkcnt >= ss->max_xfer_blk) + if (blkcnt >= max_xfer_blk) debug("\n"); return blkcnt; } @@ -1117,7 +1124,7 @@ retry_it: unsigned long usb_stor_write(int device, unsigned long blknr, unsigned long blkcnt, const void *buffer) { - unsigned long start, blks, buf_addr; + unsigned long start, blks, buf_addr, max_xfer_blk; unsigned short smallblks; struct usb_device *dev; struct us_data *ss; @@ -1162,12 +1169,14 @@ unsigned long usb_stor_write(int device, unsigned long blknr, */ retry = 2; srb->pdata = (unsigned char *)buf_addr; - if (blks > ss->max_xfer_blk) - smallblks = ss->max_xfer_blk; + max_xfer_blk = USB_MAX_XFER_BLK(buf_addr, + usb_dev_desc[device].blksz); + if (blks > max_xfer_blk) + smallblks = (unsigned short) max_xfer_blk; else smallblks = (unsigned short) blks; retry_it: - if (smallblks == ss->max_xfer_blk) + if (smallblks == max_xfer_blk) usb_show_progress(); srb->datalen = usb_dev_desc[device].blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; @@ -1188,7 +1197,7 @@ retry_it: start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ - if (blkcnt >= ss->max_xfer_blk) + if (blkcnt >= max_xfer_blk) debug("\n"); return blkcnt; @@ -1415,12 +1424,6 @@ int usb_stor_get_info(struct usb_device *dev, struct us_data *ss, USB_STOR_PRINTF(" address %d\n", dev_desc->target); USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type); - /* - * The U-Boot EHCI driver cannot handle more than 4096 * 5 bytes in a - * transfer without running itself out of qt_buffers. - */ - ss->max_xfer_blk = (4096 * 5) / dev_desc->blksz; - init_part(dev_desc); USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type); |