[ADS5121] Support for the ADS5121 board

The following MPC5121e subsystems are supported:

- low-level CPU init
- NOR Boot Flash (common CFI driver)
- DDR SDRAM
- FEC
- I2C
- Watchdog

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
Signed-off-by: Jan Wrobel <wrr@semihalf.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/cpu/mpc512x/cpu.c b/cpu/mpc512x/cpu.c
new file mode 100644
index 0000000..3be565a
--- /dev/null
+++ b/cpu/mpc512x/cpu.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
+ * (C) Copyright 2007 DENX Software Engineering
+ *
+ * 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
+ */
+
+/*
+ * CPU specific code for the MPC512x family.
+ *
+ * Derived from the MPC83xx code.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <mpc512x.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int checkcpu (void)
+{
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
+	ulong clock = gd->cpu_clk;
+	u32 pvr = get_pvr ();
+	u32 spridr = immr->sysconf.spridr;
+	char buf[32];
+
+	puts("CPU: ");
+
+	switch (spridr & 0xffff0000) {
+	case SPR_5121E:
+		puts ("MPC5121e ");
+		break;
+	default:
+		printf ("Unknown part ID %08x ", spridr & 0xffff0000);
+	}
+	printf ("rev. %d.%d, Core ", SVR_MJREV (spridr), SVR_MNREV (spridr));
+
+	switch (pvr & 0xffff0000) {
+	case PVR_E300C4:
+		puts ("e300c4 ");
+		break;
+	default:
+		puts ("unknown ");
+	}
+	printf ("at %s MHz, CSB at %3d MHz\n", strmhz(buf, clock),
+		gd->csb_clk / 1000000);
+	return 0;
+}
+
+
+int
+do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	ulong msr;
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+
+	/* Interrupts and MMU off */
+	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
+
+	msr &= ~( MSR_EE | MSR_IR | MSR_DR);
+	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
+
+	/*
+	 * Enable Reset Control Reg - "RSTE" is the magic word that let us go
+	 */
+	immap->reset.rpr = 0x52535445;
+
+	/* Verify Reset Control Reg is enabled */
+	while (!((immap->reset.rcer) & RCER_CRE))
+		;
+
+	printf ("Resetting the board.\n");
+	udelay(200);
+
+	/* Perform reset */
+	immap->reset.rcr = RCR_SWHR;
+
+	/* Unreached... */
+	return 1;
+}
+
+
+/*
+ * Get timebase clock frequency (like cpu_clk in Hz)
+ */
+unsigned long get_tbclk (void)
+{
+	ulong tbclk;
+
+	tbclk = (gd->bus_clk + 3L) / 4L;
+
+	return tbclk;
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+	int re_enable = disable_interrupts ();
+
+	/* Reset watchdog */
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
+	immr->wdt.swsrr = 0x556c;
+	immr->wdt.swsrr = 0xaa39;
+
+	if (re_enable)
+		enable_interrupts ();
+}
+#endif