Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / blackfin / lib / clocks.c

diff --git a/qemu/roms/u-boot/arch/blackfin/lib/clocks.c b/qemu/roms/u-boot/arch/blackfin/lib/clocks.c
new file mode 100644 (file)
index 0000000..7ed56a7
--- /dev/null
+++ b/qemu/roms/u-boot/arch/blackfin/lib/clocks.c
@@ -0,0 +1,140 @@
+/*
+ * clocks.c - figure out sclk/cclk/vco and such
+ *
+ * Copyright (c) 2005-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <asm/clock.h>
+
+/* Get the voltage input multiplier */
+u_long get_vco(void)
+{
+       static u_long cached_vco_pll_ctl, cached_vco;
+
+       u_long msel, pll_ctl;
+
+       pll_ctl = bfin_read_PLL_CTL();
+       if (pll_ctl == cached_vco_pll_ctl)
+               return cached_vco;
+       else
+               cached_vco_pll_ctl = pll_ctl;
+
+       msel = (pll_ctl & MSEL) >> MSEL_P;
+       if (0 == msel)
+               msel = (MSEL >> MSEL_P) + 1;
+
+       cached_vco = CONFIG_CLKIN_HZ;
+       cached_vco >>= (pll_ctl & DF);
+       cached_vco *= msel;
+       return cached_vco;
+}
+
+/* Get the Core clock */
+u_long get_cclk(void)
+{
+       static u_long cached_cclk_pll_div, cached_cclk;
+       u_long div, csel;
+#ifndef CGU_DIV
+       u_long ssel;
+#endif
+
+       if (pll_is_bypassed())
+               return CONFIG_CLKIN_HZ;
+
+       div = bfin_read_PLL_DIV();
+       if (div == cached_cclk_pll_div)
+               return cached_cclk;
+       else
+               cached_cclk_pll_div = div;
+
+       csel = (div & CSEL) >> CSEL_P;
+#ifndef CGU_DIV
+       ssel = (div & SSEL) >> SSEL_P;
+       if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
+               cached_cclk = get_vco() / ssel;
+       else
+               cached_cclk = get_vco() >> csel;
+#else
+       cached_cclk = get_vco() / csel;
+#endif
+       return cached_cclk;
+}
+
+/* Get the System clock */
+#ifdef CGU_DIV
+
+static u_long cached_sclk_pll_div, cached_sclk;
+static u_long cached_sclk0, cached_sclk1, cached_dclk;
+static u_long _get_sclk(u_long *cache)
+{
+       u_long div, ssel;
+
+       if (pll_is_bypassed())
+               return CONFIG_CLKIN_HZ;
+
+       div = bfin_read_PLL_DIV();
+       if (div == cached_sclk_pll_div)
+               return *cache;
+       else
+               cached_sclk_pll_div = div;
+
+       ssel = (div & SYSSEL) >> SYSSEL_P;
+       cached_sclk = get_vco() / ssel;
+
+       ssel = (div & S0SEL) >> S0SEL_P;
+       cached_sclk0 = cached_sclk / ssel;
+
+       ssel = (div & S1SEL) >> S1SEL_P;
+       cached_sclk1 = cached_sclk / ssel;
+
+       ssel = (div & DSEL) >> DSEL_P;
+       cached_dclk = get_vco() / ssel;
+
+       return *cache;
+}
+
+u_long get_sclk(void)
+{
+       return _get_sclk(&cached_sclk);
+}
+
+u_long get_sclk0(void)
+{
+       return _get_sclk(&cached_sclk0);
+}
+
+u_long get_sclk1(void)
+{
+       return _get_sclk(&cached_sclk1);
+}
+
+u_long get_dclk(void)
+{
+       return _get_sclk(&cached_dclk);
+}
+#else
+
+u_long get_sclk(void)
+{
+       static u_long cached_sclk_pll_div, cached_sclk;
+       u_long div, ssel;
+
+       if (pll_is_bypassed())
+               return CONFIG_CLKIN_HZ;
+
+       div = bfin_read_PLL_DIV();
+       if (div == cached_sclk_pll_div)
+               return cached_sclk;
+       else
+               cached_sclk_pll_div = div;
+
+       ssel = (div & SSEL) >> SSEL_P;
+       cached_sclk = get_vco() / ssel;
+
+       return cached_sclk;
+}
+
+#endif