From: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Date: Fri, 9 Nov 2007 14:37:23 +0000 (+0100)
Subject: ppc4xx: Make USB working with CONFIG_4xx_DCACHE defined
X-Git-Tag: v1.3.2-rc1~102^2~79
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=9be659ac0868dc367caa957c5c725e46b07f6a5f;p=u-boot

ppc4xx: Make USB working with CONFIG_4xx_DCACHE defined

This patch disables the 44x d-cache on 'usb start' and
reenables it on 'usb stop'. This should be seen as a
temporary fix until the generic usb-ohci driver can
life with d-cache enabled.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Stefan Roese <sr@denx.de>
---

diff --git a/cpu/ppc4xx/usb.c b/cpu/ppc4xx/usb.c
index 272ed8c15e..cb8d5c7d30 100644
--- a/cpu/ppc4xx/usb.c
+++ b/cpu/ppc4xx/usb.c
@@ -25,25 +25,41 @@
 
 #if defined(CONFIG_USB_OHCI_NEW) && defined(CFG_USB_OHCI_CPU_INIT)
 
+#ifdef CONFIG_4xx_DCACHE
+#include <asm/mmu.h>
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
 #include "usbdev.h"
 
 int usb_cpu_init(void)
 {
+#ifdef CONFIG_4xx_DCACHE
+	/* disable cache */
+	change_tlb(gd->bd->bi_memstart, gd->bd->bi_memsize, TLB_WORD2_I_ENABLE);
+#endif
 
 #if defined(CONFIG_440EP) || defined(CONFIG_440EPX)
 	usb_dev_init();
 #endif
-
 	return 0;
 }
 
 int usb_cpu_stop(void)
 {
+#ifdef CONFIG_4xx_DCACHE
+	/* enable cache */
+	change_tlb(gd->bd->bi_memstart, gd->bd->bi_memsize, 0);
+#endif
 	return 0;
 }
 
 int usb_cpu_init_fail(void)
 {
+#ifdef CONFIG_4xx_DCACHE
+	/* enable cache */
+	change_tlb(gd->bd->bi_memstart, gd->bd->bi_memsize, 0);
+#endif
 	return 0;
 }