[ARM] orion5x: add sram support for crypto

The security accelerator which can act as a puppet player for the crypto
engine requires its commands in the sram. This patch adds support for the
phys mapping and creates a platform device for the actual driver.

[ nico: renamed device name from "mv,orion5x-crypto" to "mv_crypto"
  so to match the module name and be more generic for Kirkwood use ]

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/arch/arm/mach-orion5x/addr-map.c b/arch/arm/mach-orion5x/addr-map.c
index c14d12137276..6f3f77d031d0 100644
--- a/arch/arm/mach-orion5x/addr-map.c
+++ b/arch/arm/mach-orion5x/addr-map.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/mbus.h>
 #include <linux/io.h>
+#include <linux/errno.h>
 #include <mach/hardware.h>
 #include "common.h"
 
@@ -44,6 +45,7 @@
 #define TARGET_DEV_BUS          1
 #define TARGET_PCI              3
 #define TARGET_PCIE             4
+#define TARGET_SRAM             9
 #define ATTR_PCIE_MEM           0x59
 #define ATTR_PCIE_IO            0x51
 #define ATTR_PCIE_WA            0x79
@@ -53,6 +55,7 @@
 #define ATTR_DEV_CS1            0x1d
 #define ATTR_DEV_CS2            0x1b
 #define ATTR_DEV_BOOT           0xf
+#define ATTR_SRAM               0x0
 
 /*
  * Helpers to get DDR bank info
@@ -87,13 +90,13 @@ static int __init orion5x_cpu_win_can_remap(int win)
         return 0;
 }
 
-static void __init setup_cpu_win(int win, u32 base, u32 size,
+static int __init setup_cpu_win(int win, u32 base, u32 size,
                                  u8 target, u8 attr, int remap)
 {
         if (win >= 8) {
                 printk(KERN_ERR "setup_cpu_win: trying to allocate "
                                 "window %d\n", win);
-                return;
+                return -ENOSPC;
         }
 
         writel(base & 0xffff0000, CPU_WIN_BASE(win));
@@ -107,6 +110,7 @@ static void __init setup_cpu_win(int win, u32 base, u32 size,
                 writel(remap & 0xffff0000, CPU_WIN_REMAP_LO(win));
                 writel(0, CPU_WIN_REMAP_HI(win));
         }
+        return 0;
 }
 
 void __init orion5x_setup_cpu_mbus_bridge(void)
@@ -193,3 +197,9 @@ void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
         setup_cpu_win(win_alloc_count++, base, size,
                       TARGET_PCIE, ATTR_PCIE_WA, -1);
 }
+
+int __init orion5x_setup_sram_win(void)
+{
+        return setup_cpu_win(win_alloc_count, ORION5X_SRAM_PHYS_BASE,
+                        ORION5X_SRAM_SIZE, TARGET_SRAM, ATTR_SRAM, -1);
+}