[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, 87 insertions, 0 deletions

diff --git a/cpu/mpc512x/cpu_init.c b/cpu/mpc512x/cpu_init.c
new file mode 100644
index 0000000..566e08b
--- /dev/null
+++ b/cpu/mpc512x/cpu_init.c
@@ -0,0 +1,87 @@
+/*
+ * 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
+ *
+ * Derived from the MPC83xx code.
+ *
+ */
+
+#include <common.h>
+#include <mpc512x.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Set up the memory map, initialize registers,
+ */
+void cpu_init_f (volatile immap_t * im)
+{
+	u32 ips_div;
+
+	/* Pointer is writable since we allocated a register for it */
+	gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
+
+	/* Clear initial global data */
+	memset ((void *) gd, 0, sizeof (gd_t));
+
+	/* system performance tweaking */
+
+#ifdef CFG_ACR_PIPE_DEP
+	/* Arbiter pipeline depth */
+	im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) |
+			  (CFG_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT);
+#endif
+
+#ifdef CFG_ACR_RPTCNT
+	/* Arbiter repeat count */
+	im->arbiter.acr = ((im->arbiter.acr & ~(ACR_RPTCNT)) |
+			   (CFG_ACR_RPTCNT << ACR_RPTCNT_SHIFT));
+#endif
+
+	/* RSR - Reset Status Register - clear all status */
+	gd->reset_status = im->reset.rsr;
+	im->reset.rsr = ~(RSR_RES);
+
+	/*
+	 * RMR - Reset Mode Register - enable checkstop reset
+	 */
+	im->reset.rmr = (RMR_CSRE & (1 << RMR_CSRE_SHIFT));
+
+	/* Set IPS-CSB divider: IPS = 1/2 CSB */
+	ips_div = im->clk.scfr[0];
+	ips_div &= ~(SCFR1_IPS_DIV_MASK);
+	ips_div |= SCFR1_IPS_DIV << SCFR1_IPS_DIV_SHIFT;
+	im->clk.scfr[0] = ips_div;
+
+	/*
+	 * Enable Time Base/Decrementer
+	 *
+	 * NOTICE: TB needs to be enabled as early as possible in order to
+	 * have udelay() working; if not enabled, usually leads to a hang, like
+	 * during FLASH chip identification etc. 
+	 */
+	im->sysconf.spcr |= SPCR_TBEN;
+}
+
+int cpu_init_r (void)
+{
+	return 0;
+}