Orion: initialise mbus DRAM target info on boot

Initialise orion_mbus_dram_info on boot, and prepare for passing
this info into peripheral drivers.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/arch/arm/mach-orion/addr-map.c b/arch/arm/mach-orion/addr-map.c
index 58cc3c0333b6..ab4484cc14b7 100644
--- a/arch/arm/mach-orion/addr-map.c
+++ b/arch/arm/mach-orion/addr-map.c
@@ -12,6 +12,7 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/mbus.h>
 #include <asm/hardware.h>
 #include "common.h"
 
@@ -168,6 +169,9 @@
 #define SATA_WIN_BASE(win)      ORION_SATA_REG(0x34 + ((win) * 0x10))
 #define SATA_MAX_WIN            4
 
+
+struct mbus_dram_target_info orion_mbus_dram_info;
+
 static int __init orion_cpu_win_can_remap(u32 win)
 {
         u32 dev, rev;
@@ -257,6 +261,7 @@ void __init orion_setup_cpu_win(enum orion_target target, u32 base, u32 size, in
 void __init orion_setup_cpu_wins(void)
 {
         int i;
+        int cs;
 
         /*
          * First, disable and clear windows
@@ -281,6 +286,30 @@ void __init orion_setup_cpu_wins(void)
                                 ORION_PCIE_MEM_SIZE, -1);
         orion_setup_cpu_win(ORION_PCI_MEM, ORION_PCI_MEM_PHYS_BASE,
                                 ORION_PCI_MEM_SIZE, -1);
+
+        /*
+         * Setup MBUS dram target info.
+         */
+        orion_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
+
+        for (i = 0, cs = 0; i < 4; i++) {
+                u32 base = readl(DDR_BASE_CS(i));
+                u32 size = readl(DDR_SIZE_CS(i));
+
+                /*
+                 * Chip select enabled?
+                 */
+                if (size & 1) {
+                        struct mbus_dram_window *w;
+
+                        w = &orion_mbus_dram_info.cs[cs++];
+                        w->cs_index = i;
+                        w->mbus_attr = 0xf & ~(1 << i);
+                        w->base = base & 0xff000000;
+                        w->size = (size | 0x00ffffff) + 1;
+                }
+        }
+        orion_mbus_dram_info.num_cs = cs;
 }
 
 /*