Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / arm926ejs / kirkwood / mpp.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/kirkwood/mpp.c b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/kirkwood/mpp.c
new file mode 100644 (file)
index 0000000..0ba6f09
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/kirkwood/mpp.c
@@ -0,0 +1,90 @@
+/*
+ * arch/arm/mach-kirkwood/mpp.c
+ *
+ * MPP functions for Marvell Kirkwood SoCs
+ * Referenced from Linux kernel source
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/kirkwood.h>
+#include <asm/arch/mpp.h>
+
+static u32 kirkwood_variant(void)
+{
+       switch (readl(KW_REG_DEVICE_ID) & 0x03) {
+       case 1:
+               return MPP_F6192_MASK;
+       case 2:
+               return MPP_F6281_MASK;
+       default:
+               debug("MPP setup: unknown kirkwood variant\n");
+               return 0;
+       }
+}
+
+#define MPP_CTRL(i)    (KW_MPP_BASE + (i* 4))
+#define MPP_NR_REGS    (1 + MPP_MAX/8)
+
+void kirkwood_mpp_conf(const u32 *mpp_list, u32 *mpp_save)
+{
+       u32 mpp_ctrl[MPP_NR_REGS];
+       unsigned int variant_mask;
+       int i;
+
+       variant_mask = kirkwood_variant();
+       if (!variant_mask)
+               return;
+
+       debug( "initial MPP regs:");
+       for (i = 0; i < MPP_NR_REGS; i++) {
+               mpp_ctrl[i] = readl(MPP_CTRL(i));
+               debug(" %08x", mpp_ctrl[i]);
+       }
+       debug("\n");
+
+
+       while (*mpp_list) {
+               unsigned int num = MPP_NUM(*mpp_list);
+               unsigned int sel = MPP_SEL(*mpp_list);
+               unsigned int sel_save;
+               int shift;
+
+               if (num > MPP_MAX) {
+                       debug("kirkwood_mpp_conf: invalid MPP "
+                                       "number (%u)\n", num);
+                       continue;
+               }
+               if (!(*mpp_list & variant_mask)) {
+                       debug("kirkwood_mpp_conf: requested MPP%u config "
+                               "unavailable on this hardware\n", num);
+                       continue;
+               }
+
+               shift = (num & 7) << 2;
+
+               if (mpp_save) {
+                       sel_save = (mpp_ctrl[num / 8] >> shift) & 0xf;
+                       *mpp_save = num | (sel_save << 8) | variant_mask;
+                       mpp_save++;
+               }
+
+               mpp_ctrl[num / 8] &= ~(0xf << shift);
+               mpp_ctrl[num / 8] |= sel << shift;
+
+               mpp_list++;
+       }
+
+       debug("  final MPP regs:");
+       for (i = 0; i < MPP_NR_REGS; i++) {
+               writel(mpp_ctrl[i], MPP_CTRL(i));
+               debug(" %08x", mpp_ctrl[i]);
+       }
+       debug("\n");
+
+}