mvebu: add preliminary support for PCI express

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35211 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 80 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-3.8/031-arm_plat_orion_refactor.patch b/target/linux/mvebu/patches-3.8/031-arm_plat_orion_refactor.patch
new file mode 100644
index 000000000..fe9f6285f
--- /dev/null
+++ b/target/linux/mvebu/patches-3.8/031-arm_plat_orion_refactor.patch
@@ -0,0 +1,80 @@
+In the address decoding code, the orion_disable_wins() function is
+used at boot time to disable all address decoding windows, before
+configuring only the ones that are needed. This allows to make sure
+that no configuration is left from the bootloader.
+
+As a preparation for the introduction of address decoding window
+allocation/deallocation function, we refactor this function into an
+orion_disable_cpu_win() which disables a single window.
+
+The orion_config_wins() function is changed to call
+orion_disable_cpu_win() in a loop, to preserve an identical behavior.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ arch/arm/plat-orion/addr-map.c |   35 +++++++++++++++++------------------
+ 1 file changed, 17 insertions(+), 18 deletions(-)
+
+--- a/arch/arm/plat-orion/addr-map.c
++++ b/arch/arm/plat-orion/addr-map.c
+@@ -95,6 +95,19 @@ void __init orion_setup_cpu_win(const st
+ 	}
+ }
+ 
++static void __init orion_disable_cpu_win(const struct orion_addr_map_cfg *cfg,
++					 const int win)
++{
++	void __iomem *addr = cfg->win_cfg_base(cfg, win);
++
++	writel(0, addr + WIN_BASE_OFF);
++	writel(0, addr + WIN_CTRL_OFF);
++	if (cfg->cpu_win_can_remap(cfg, win)) {
++		writel(0, addr + WIN_REMAP_LO_OFF);
++		writel(0, addr + WIN_REMAP_HI_OFF);
++	}
++}
++
+ /*
+  * Configure a number of windows.
+  */
+@@ -108,36 +121,22 @@ static void __init orion_setup_cpu_wins(
+ 	}
+ }
+ 
+-static void __init orion_disable_wins(const struct orion_addr_map_cfg * cfg)
+-{
+-	void __iomem *addr;
+-	int i;
+-
+-	for (i = 0; i < cfg->num_wins; i++) {
+-		addr = cfg->win_cfg_base(cfg, i);
+-
+-		writel(0, addr + WIN_BASE_OFF);
+-		writel(0, addr + WIN_CTRL_OFF);
+-		if (cfg->cpu_win_can_remap(cfg, i)) {
+-			writel(0, addr + WIN_REMAP_LO_OFF);
+-			writel(0, addr + WIN_REMAP_HI_OFF);
+-		}
+-	}
+-}
+-
+ /*
+  * Disable, clear and configure windows.
+  */
+ void __init orion_config_wins(struct orion_addr_map_cfg * cfg,
+ 			      const struct orion_addr_map_info *info)
+ {
++	int win;
++
+ 	if (!cfg->cpu_win_can_remap)
+ 		cfg->cpu_win_can_remap = orion_cpu_win_can_remap;
+ 
+ 	if (!cfg->win_cfg_base)
+ 		cfg->win_cfg_base = orion_win_cfg_base;
+ 
+-	orion_disable_wins(cfg);
++	for (win = 0; win < cfg->num_wins; win++)
++		orion_disable_cpu_win(cfg, win);
+ 
+ 	if (info)
+ 		orion_setup_cpu_wins(cfg, info);