X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fusb%2Fmusb%2Fam35x.c;h=62c3a6f60aa8c066177ec11b79b68e023176142a;hb=f18114436137f43fff7d325b4f5d9c6b5ba9551c;hp=2024940cdd83809cd86efba7326b17ce99c526cb;hpb=dbea32420022be62116e1c49222be4d64af62c38;p=u-boot

diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 2024940cdd..62c3a6f60a 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -7,20 +7,9 @@
  *
  * Copyright (c) 2010 Texas Instruments Incorporated
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * SPDX-License-Identifier:	GPL-2.0+
  */
+
 #include <common.h>
 
 #include "am35x.h"
@@ -116,3 +105,35 @@ void musb_platform_deinit(void)
 	/* Turn off the phy */
 	phy_off();
 }
+
+/*
+ * This function reads data from endpoint fifo for AM35x
+ * which supports only 32bit read operation.
+ *
+ * ep           - endpoint number
+ * length       - number of bytes to read from FIFO
+ * fifo_data    - pointer to data buffer into which data is read
+ */
+__attribute__((weak))
+void read_fifo(u8 ep, u32 length, void *fifo_data)
+{
+	u8  *data = (u8 *)fifo_data;
+	u32 val;
+	int i;
+
+	/* select the endpoint index */
+	writeb(ep, &musbr->index);
+
+	if (length > 4) {
+		for (i = 0; i < (length >> 2); i++) {
+			val = readl(&musbr->fifox[ep]);
+			memcpy(data, &val, 4);
+			data += 4;
+		}
+		length %= 4;
+	}
+	if (length > 0) {
+		val = readl(&musbr->fifox[ep]);
+		memcpy(data, &val, length);
+	}
+}