Orion: revamp cpu mbus window handling

Instead of forcing all device bus window setup through one function
with some enum as the first argument, create separate window setup
functions for each of the four possible targets, and do the demux
internally.  This allows getting rid of the window identifier enum
and the big switch statement in orion_setup_cpu_win().

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, 50 insertions, 94 deletions

diff --git a/arch/arm/mach-orion/addr-map.c b/arch/arm/mach-orion/addr-map.c
index 3de5de9ac656..ca641db6214d 100644
--- a/arch/arm/mach-orion/addr-map.c
+++ b/arch/arm/mach-orion/addr-map.c
@@ -25,10 +25,10 @@
  * CPU address decoding --
  * Linux assumes that it is the boot loader that already setup the access to
  * DDR and internal registers.
- * Setup access to PCI and PCI-E IO/MEM space is issued by core.c.
+ * Setup access to PCI and PCI-E IO/MEM space is issued by this file.
  * Setup access to various devices located on the device bus interface (e.g.
  * flashes, RTC, etc) should be issued by machine-setup.c according to
- * specific board population (by using orion_setup_cpu_win()).
+ * specific board population (by using orion_setup_*_win()).
  *
  * Non-CPU Masters address decoding --
  * Unlike the CPU, we setup the access from Orion's master interfaces to DDR
@@ -53,6 +53,7 @@
                                 ((n) == 3) ? 0x7 : 0xf)
 #define ATTR_PCIE_MEM           0x59
 #define ATTR_PCIE_IO            0x51
+#define ATTR_PCIE_WA            0x79
 #define ATTR_PCI_MEM            0x59
 #define ATTR_PCI_IO             0x51
 #define ATTR_DEV_CS0            0x1e
@@ -78,19 +79,6 @@
 #define CPU_WIN_BASE(n)         ORION_BRIDGE_REG(0x004 | ((n) << 4))
 #define CPU_WIN_REMAP_LO(n)     ORION_BRIDGE_REG(0x008 | ((n) << 4))
 #define CPU_WIN_REMAP_HI(n)     ORION_BRIDGE_REG(0x00c | ((n) << 4))
-#define CPU_MAX_WIN             8
-
-/*
- * Use this CPU address decode windows allocation
- */
-#define CPU_WIN_PCIE_IO         0
-#define CPU_WIN_PCI_IO          1
-#define CPU_WIN_PCIE_MEM        2
-#define CPU_WIN_PCI_MEM         3
-#define CPU_WIN_DEV_BOOT        4
-#define CPU_WIN_DEV_CS0         5
-#define CPU_WIN_DEV_CS1         6
-#define CPU_WIN_DEV_CS2         7
 
 /*
  * Gigabit Ethernet Address Decode Windows registers
@@ -106,7 +94,7 @@
 
 struct mbus_dram_target_info orion_mbus_dram_info;
 
-static int __init orion_cpu_win_can_remap(u32 win)
+static int __init orion_cpu_win_can_remap(int win)
 {
         u32 dev, rev;
 
@@ -119,88 +107,31 @@ static int __init orion_cpu_win_can_remap(u32 win)
         return 0;
 }
 
-void __init orion_setup_cpu_win(enum orion_target target, u32 base, u32 size, int remap)
+static void __init setup_cpu_win(int win, u32 base, u32 size,
+                                 u8 target, u8 attr, int remap)
 {
-        u32 win, attr, ctrl;
-
-        switch (target) {
-        case ORION_PCIE_IO:
-                target = TARGET_PCIE;
-                attr = ATTR_PCIE_IO;
-                win = CPU_WIN_PCIE_IO;
-                break;
-        case ORION_PCI_IO:
-                target = TARGET_PCI;
-                attr = ATTR_PCI_IO;
-                win = CPU_WIN_PCI_IO;
-                break;
-        case ORION_PCIE_MEM:
-                target = TARGET_PCIE;
-                attr = ATTR_PCIE_MEM;
-                win = CPU_WIN_PCIE_MEM;
-                break;
-        case ORION_PCI_MEM:
-                target = TARGET_PCI;
-                attr = ATTR_PCI_MEM;
-                win = CPU_WIN_PCI_MEM;
-                break;
-        case ORION_DEV_BOOT:
-                target = TARGET_DEV_BUS;
-                attr = ATTR_DEV_BOOT;
-                win = CPU_WIN_DEV_BOOT;
-                break;
-        case ORION_DEV0:
-                target = TARGET_DEV_BUS;
-                attr = ATTR_DEV_CS0;
-                win = CPU_WIN_DEV_CS0;
-                break;
-        case ORION_DEV1:
-                target = TARGET_DEV_BUS;
-                attr = ATTR_DEV_CS1;
-                win = CPU_WIN_DEV_CS1;
-                break;
-        case ORION_DEV2:
-                target = TARGET_DEV_BUS;
-                attr = ATTR_DEV_CS2;
-                win = CPU_WIN_DEV_CS2;
-                break;
-        case ORION_DDR:
-        case ORION_REGS:
-                /*
-                 * Must be mapped by bootloader.
-                 */
-        default:
-                target = attr = win = -1;
-                BUG();
-        }
-
-        base &= 0xffff0000;
-        ctrl = (((size - 1) & 0xffff0000) | (attr << 8) |
-                (target << 4) | WIN_EN);
-
-        orion_write(CPU_WIN_BASE(win), base);
-        orion_write(CPU_WIN_CTRL(win), ctrl);
+        orion_write(CPU_WIN_BASE(win), base & 0xffff0000);
+        orion_write(CPU_WIN_CTRL(win),
+                ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1);
 
         if (orion_cpu_win_can_remap(win)) {
-                if (remap >= 0) {
-                        orion_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
-                        orion_write(CPU_WIN_REMAP_HI(win), 0);
-                } else {
-                        orion_write(CPU_WIN_REMAP_LO(win), base);
-                        orion_write(CPU_WIN_REMAP_HI(win), 0);
-                }
+                if (remap < 0)
+                        remap = base;
+
+                orion_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
+                orion_write(CPU_WIN_REMAP_HI(win), 0);
         }
 }
 
-void __init orion_setup_cpu_wins(void)
+void __init orion_setup_cpu_mbus_bridge(void)
 {
         int i;
         int cs;
 
         /*
-         * First, disable and clear windows
+         * First, disable and clear windows.
          */
-        for (i = 0; i < CPU_MAX_WIN; i++) {
+        for (i = 0; i < 8; i++) {
                 orion_write(CPU_WIN_BASE(i), 0);
                 orion_write(CPU_WIN_CTRL(i), 0);
                 if (orion_cpu_win_can_remap(i)) {
@@ -212,14 +143,14 @@ void __init orion_setup_cpu_wins(void)
         /*
          * Setup windows for PCI+PCIe IO+MEM space.
          */
-        orion_setup_cpu_win(ORION_PCIE_IO, ORION_PCIE_IO_PHYS_BASE,
-                                ORION_PCIE_IO_SIZE, ORION_PCIE_IO_BUS_BASE);
-        orion_setup_cpu_win(ORION_PCI_IO, ORION_PCI_IO_PHYS_BASE,
-                                ORION_PCI_IO_SIZE, ORION_PCI_IO_BUS_BASE);
-        orion_setup_cpu_win(ORION_PCIE_MEM, ORION_PCIE_MEM_PHYS_BASE,
-                                ORION_PCIE_MEM_SIZE, -1);
-        orion_setup_cpu_win(ORION_PCI_MEM, ORION_PCI_MEM_PHYS_BASE,
-                                ORION_PCI_MEM_SIZE, -1);
+        setup_cpu_win(0, ORION_PCIE_IO_PHYS_BASE, ORION_PCIE_IO_SIZE,
+                TARGET_PCIE, ATTR_PCIE_IO, ORION_PCIE_IO_BUS_BASE);
+        setup_cpu_win(1, ORION_PCI_IO_PHYS_BASE, ORION_PCI_IO_SIZE,
+                TARGET_PCI, ATTR_PCI_IO, ORION_PCI_IO_BUS_BASE);
+        setup_cpu_win(2, ORION_PCIE_MEM_PHYS_BASE, ORION_PCIE_MEM_SIZE,
+                TARGET_PCIE, ATTR_PCIE_MEM, -1);
+        setup_cpu_win(3, ORION_PCI_MEM_PHYS_BASE, ORION_PCI_MEM_SIZE,
+                TARGET_PCI, ATTR_PCI_MEM, -1);
 
         /*
          * Setup MBUS dram target info.
@@ -246,6 +177,31 @@ void __init orion_setup_cpu_wins(void)
         orion_mbus_dram_info.num_cs = cs;
 }
 
+void __init orion_setup_dev_boot_win(u32 base, u32 size)
+{
+        setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
+}
+
+void __init orion_setup_dev0_win(u32 base, u32 size)
+{
+        setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
+}
+
+void __init orion_setup_dev1_win(u32 base, u32 size)
+{
+        setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
+}
+
+void __init orion_setup_dev2_win(u32 base, u32 size)
+{
+        setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
+}
+
+void __init orion_setup_pcie_wa_win(u32 base, u32 size)
+{
+        setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1);
+}
+
 void __init orion_setup_eth_wins(void)
 {
         int i;