update atheros 2.6 port - add support for the older chip generation

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6265 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 67 insertions, 0 deletions

diff --git a/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c b/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c
new file mode 100644
index 000000000..6dfa13c77
--- /dev/null
+++ b/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c
@@ -0,0 +1,67 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright MontaVista Software Inc
+ * Copyright (C) 2003 Atheros Communications, Inc.,  All Rights Reserved.
+ * Copyright (C) 2006 FON Technology, SL.
+ * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ */
+
+/*
+ * Prom setup file for ar531x
+ */
+
+#include <linux/init.h>
+#include <linux/autoconf.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include "ar531x.h"
+
+void __init prom_init(void)
+{
+	u32 memsize, memcfg;
+
+	mips_machgroup = MACH_GROUP_ATHEROS;
+	mips_machtype = -1;
+
+	/*                                                                             
+	 * Atheros CPUs before the AR2315 are using MIPS 4Kc core, later designs are
+	 * using MIPS 4KEc R2 core. This makes it easy to determine the board at runtime.
+	 */
+                                                                            
+	if (current_cpu_data.cputype == CPU_4KEC) {
+		mips_machtype = MACH_ATHEROS_AR5315;
+		
+		memcfg = sysRegRead(AR5315_MEM_CFG);
+		memsize   = 1 + ((memcfg & SDRAM_DATA_WIDTH_M) >> SDRAM_DATA_WIDTH_S);
+		memsize <<= 1 + ((memcfg & SDRAM_COL_WIDTH_M) >> SDRAM_COL_WIDTH_S);
+		memsize <<= 1 + ((memcfg & SDRAM_ROW_WIDTH_M) >> SDRAM_ROW_WIDTH_S);
+		memsize <<= 3;
+	} else {
+		int bank0AC, bank1AC;
+
+		mips_machtype = MACH_ATHEROS_AR5312;
+
+		memcfg = sysRegRead(AR531X_MEM_CFG1);
+		bank0AC = (memcfg & MEM_CFG1_AC0) >> MEM_CFG1_AC0_S;
+		bank1AC = (memcfg & MEM_CFG1_AC1) >> MEM_CFG1_AC1_S;
+		memsize = (bank0AC ? (1 << (bank0AC+1)) : 0)
+		        + (bank1AC ? (1 << (bank1AC+1)) : 0);
+		memsize <<= 20;
+	}
+
+	add_memory_region(0, memsize, BOOT_MEM_RAM);
+	strcpy(arcs_cmdline, "console=ttyS0,9600 rootfstype=squashfs,jffs2");
+}
+
+void __init prom_free_prom_memory(void)
+{
+}