From: Stefan Roese <sr@denx.de>
Date: Tue, 20 Feb 2007 12:17:42 +0000 (+0100)
Subject: [PATCH] Update SystemACE driver for 16bit access
X-Git-Tag: v1.3.0-rc1~162
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d93e2212f962668b3dce091ff5edc33f2347fe37;p=oweals%2Fu-boot.git

[PATCH] Update SystemACE driver for 16bit access

This patch removes some problems when the Xilinx SystemACE driver
is used with 16bit access on an big endian platform (like the
AMCC Katmai).

Signed-off-by: Stefan Roese <sr@denx.de>
---

diff --git a/drivers/systemace.c b/drivers/systemace.c
index 9502623a74..3bd2ea999c 100644
--- a/drivers/systemace.c
+++ b/drivers/systemace.c
@@ -66,8 +66,8 @@
                              writeb(val>>8, CFG_SYSTEMACE_BASE+off+1);}
 #endif
 #else
-#define ace_readw(off) (readw(CFG_SYSTEMACE_BASE+off))
-#define ace_writew(val, off) (writew(val, CFG_SYSTEMACE_BASE+off))
+#define ace_readw(off) (in16(CFG_SYSTEMACE_BASE+off))
+#define ace_writew(val, off) (out16(CFG_SYSTEMACE_BASE+off,val))
 #endif
 
 /* */
@@ -119,6 +119,14 @@ block_dev_desc_t *systemace_get_dev(int dev)
 		systemace_dev.removable = 1;
 		systemace_dev.block_read = systemace_read;
 
+#if (CFG_SYSTEMACE_WIDTH == 16)
+		/*
+		 * By default the SystemACE comes up in 8-bit mode.
+		 * Ensure that 16-bit mode gets enabled.
+		 */
+		ace_writew(0x0001, 0);
+#endif
+
 		init_part(&systemace_dev);
 
 	}
@@ -197,7 +205,7 @@ static unsigned long systemace_read(int dev, unsigned long start,
 #endif
 		/* Write LBA block address */
 		ace_writew((start >> 0) & 0xffff, 0x10);
-		ace_writew((start >> 16) & 0x00ff, 0x12);
+		ace_writew((start >> 16) & 0x0fff, 0x12);
 
 		/* NOTE: in the Write Sector count below, a count of 0
 		   causes a transfer of 256, so &0xff gives the right