add uboot-lantiq (based on a patch contributed by Lantiq)

[openwrt/svn-archive/archive.git] / package / uboot-lantiq / files / cpu / mips / danube / clock.c

diff --git a/package/uboot-lantiq/files/cpu/mips/danube/clock.c b/package/uboot-lantiq/files/cpu/mips/danube/clock.c
new file mode 100644 (file)
index 0000000..4219f8f
--- /dev/null
+++ b/package/uboot-lantiq/files/cpu/mips/danube/clock.c
@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/danube.h>
+
+ulong ifx_get_ddr_hz(void)
+{
+       static const ulong ddr_freq[] = {166666667,133333333,111111111,83333333};
+       return ddr_freq[((*DANUBE_CGU_SYS) & 0x3)];
+}
+
+ulong ifx_get_cpuclk(void)
+{
+#ifdef CONFIG_USE_EMULATOR
+       return EMULATOR_CPU_SPEED;
+#else //NOT CONFIG_USE_EMULATOR
+       unsigned int ddr_clock=ifx_get_ddr_hz();
+       switch((*DANUBE_CGU_SYS) & 0xc){
+               case 0:
+               default:
+                       return 323333333;
+               case 4:
+                       return ddr_clock;
+               case 8:
+                       return ddr_clock << 1;
+       }
+#endif
+}
+
+ulong get_bus_freq(ulong dummy)
+{
+#ifdef CONFIG_USE_EMULATOR
+       unsigned int  clkCPU;
+       clkCPU = ifx_get_cpuclk();
+       return clkCPU >> 2;
+#else //NOT CONFIG_USE_EMULATOR
+       unsigned int ddr_clock=ifx_get_ddr_hz();
+       if ((*DANUBE_CGU_SYS) & 0x40){
+               return ddr_clock >> 1;
+       }
+       return ddr_clock;
+#endif
+}
+