From 42d1f0394bef0624fc9664714d54bb137931d6a6 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Wed, 15 Oct 2003 23:53:47 +0000
Subject: * Patches by Xianghua Xiao, 15 Oct 2003:

  - Added Motorola CPU 8540/8560 support (cpu/85xx)
  - Added Motorola MPC8540ADS board support (board/mpc8540ads)
  - Added Motorola MPC8560ADS board support (board/mpc8560ads)

* Minor code cleanup
---
 cpu/mpc85xx/speed.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 cpu/mpc85xx/speed.c

(limited to 'cpu/mpc85xx/speed.c')

diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c
new file mode 100644
index 0000000..a720cff
--- /dev/null
+++ b/cpu/mpc85xx/speed.c
@@ -0,0 +1,124 @@
+/*
+ * (C) Copyright 2003 Motorola Inc.
+ * Xianghua Xiao, (X.Xiao@motorola.com)
+ *
+ * (C) Copyright 2000
+ * 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 <ppc_asm.tmpl>
+#include <asm/processor.h>
+
+/* --------------------------------------------------------------- */
+
+#define ONE_BILLION        1000000000
+
+void get_sys_info (sys_info_t * sysInfo)
+{
+	volatile immap_t    *immap = (immap_t *)CFG_IMMR;
+	volatile ccsr_gur_t *gur = &immap->im_gur;
+	uint plat_ratio,e500_ratio;
+
+	plat_ratio = (gur->porpllsr) & 0x0000003e;
+	plat_ratio >>= 1;
+	switch(plat_ratio) {
+	case 0x02:
+	case 0x03:
+	case 0x04:
+	case 0x05:
+	case 0x06:
+	case 0x08:
+	case 0x09:
+	case 0x0a:
+	case 0x0c:
+	case 0x10:
+		sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ;
+		break;
+	default:
+		sysInfo->freqSystemBus = 0;
+		break;
+	}
+
+	e500_ratio = (gur->porpllsr) & 0x003f0000;
+	e500_ratio >>= 16;
+	switch(e500_ratio) {
+	case 0x04:
+		sysInfo->freqProcessor = 2*sysInfo->freqSystemBus;
+		break;
+	case 0x05:
+		sysInfo->freqProcessor = 5*sysInfo->freqSystemBus/2;
+		break;
+	case 0x06:
+		sysInfo->freqProcessor = 3*sysInfo->freqSystemBus;
+		break;
+	case 0x07:
+		sysInfo->freqProcessor = 7*sysInfo->freqSystemBus/2;
+		break;
+	default:
+		sysInfo->freqProcessor = 0;
+		break;
+	}
+}
+
+int get_clocks (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	sys_info_t sys_info;
+#if defined(CONFIG_MPC8560)
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	uint sccr, dfbrg;
+
+	/* set VCO = 4 * BRG */
+	immap->im_cpm.im_cpm_intctl.sccr &= 0xfffffffc;
+	sccr = immap->im_cpm.im_cpm_intctl.sccr;
+	dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
+#endif
+	get_sys_info (&sys_info);
+	gd->cpu_clk = sys_info.freqProcessor;
+	gd->bus_clk = sys_info.freqSystemBus;
+#if defined(CONFIG_MPC8560)
+	gd->vco_out = 2*sys_info.freqSystemBus;
+	gd->cpm_clk = gd->vco_out / 2;
+	gd->scc_clk = gd->vco_out / 4;
+	gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1)));
+#endif
+
+	if(gd->cpu_clk != 0) return (0);
+	else return (1);
+}
+
+
+/********************************************
+ * get_bus_freq
+ * return system bus freq in Hz
+ *********************************************/
+ulong get_bus_freq (ulong dummy)
+{
+	ulong val;
+
+	sys_info_t sys_info;
+
+	get_sys_info (&sys_info);
+	val = sys_info.freqSystemBus;
+
+	return val;
+}
-- 
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