From: Sonic Zhang <sonic.zhang@analog.com>
Date: Wed, 21 Nov 2007 15:49:52 +0000 (+0800)
Subject: Blackfin arch: fix bug NOR Flash MTD mount fail
X-Git-Tag: v2.6.24-rc4~95^2~19
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e40540b304d5d15c344585c4a7b3116e73add2db;p=linux-2.6

Blackfin arch: fix bug NOR Flash MTD mount fail

Config EBIU flash mode properly. EBIU_MODE EBIU_FCTL
EBIU_MBSCTL register should be configurd to Flash
mode.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 2e5ce84851..3bb25da8b5 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -866,6 +866,20 @@ config BANK_3
 	default 0x99B3
 endmenu
 
+config EBIU_MBSCTLVAL
+	hex "EBIU Bank Select Control Register"
+	depends on BF54x
+	default 0
+
+config EBIU_MODEVAL
+	hex "Flash Memory Mode Control Register"
+	depends on BF54x
+	default 1
+
+config EBIU_FCTLVAL
+	hex "Flash Memory Bank Control Register"
+	depends on BF54x
+	default 6
 endmenu
 
 #############################################################################
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 3071c243d4..74b34c7f36 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -158,6 +158,27 @@ ENTRY(__stext)
 	w[p2] = r0;
 	ssync;
 
+	p2.h = hi(EBIU_MBSCTL);
+	p2.l = lo(EBIU_MBSCTL);
+	r0.h = hi(CONFIG_EBIU_MBSCTLVAL);
+	r0.l = lo(CONFIG_EBIU_MBSCTLVAL);
+	[p2] = r0;
+	ssync;
+
+	p2.h = hi(EBIU_MODE);
+	p2.l = lo(EBIU_MODE);
+	r0.h = hi(CONFIG_EBIU_MODEVAL);
+	r0.l = lo(CONFIG_EBIU_MODEVAL);
+	[p2] = r0;
+	ssync;
+
+	p2.h = hi(EBIU_FCTL);
+	p2.l = lo(EBIU_FCTL);
+	r0.h = hi(CONFIG_EBIU_FCTLVAL);
+	r0.l = lo(CONFIG_EBIU_FCTLVAL);
+	[p2] = r0;
+	ssync;
+
 	/* This section keeps the processor in supervisor mode
 	 * during kernel boot.  Switches to user mode at end of boot.
 	 * See page 3-9 of Hardware Reference manual for documentation.