[U-Boot] [PATCH v4 3/7] usb_storage: Restore non-EHCI support

[Benoît Thébaudeau]

The commit 5dd95cf made the MSC driver EHCI-specific. This patch restores a
basic support of non-EHCI HCDs, like before that commit.

The fallback transfer size is certainly not optimal, but at least it should work
like before.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
Cc: Marek Vasut <marex at denx.de>
Cc: Ilya Yanok <ilya.yanok at cogentembedded.com>
Cc: Stefan Herbrechtsmeier <stefan at herbrechtsmeier.net>
---
Changes for v2: None.
Changes for v3:
 - Patch swapped with the currently following one.
Changes for v4: None.

 .../common/usb_storage.c                           |    4 ++++
 1 file changed, 4 insertions(+)

diff --git u-boot-usb-4f8254e.orig/common/usb_storage.c u-boot-usb-4f8254e/common/usb_storage.c
index bdc306f..0cd6399 100644
--- u-boot-usb-4f8254e.orig/common/usb_storage.c
+++ u-boot-usb-4f8254e/common/usb_storage.c
@@ -155,11 +155,15 @@ struct us_data {
 	trans_cmnd	transport;		/* transport routine */
 };
 
+#ifdef CONFIG_USB_EHCI
 /*
  * 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)
+#else
+#define USB_MAX_XFER_BLK(start, blksz)	20
+#endif
 
 static struct us_data usb_stor[USB_MAX_STOR_DEV];