* Patch by Stephen Williams, 01 Apr 2004:

  Add support for Picture Elements JSE board

* Patch by Christian Pell, 01 Apr 2004:
  Add CompactFlash support for PXA systems.

1 files changed, 182 insertions, 0 deletions

diff --git a/board/jse/sdram.c b/board/jse/sdram.c
new file mode 100644
index 0000000..9060d97
--- /dev/null
+++ b/board/jse/sdram.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2004 Picture Elements, Inc.
+ *    Stephen Williams (steve@icarus.com)
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form 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 <ppc4xx.h>
+#include <asm/processor.h>
+
+# define SDRAM_LEN 0x08000000
+
+/*
+ * this is even after checkboard. It returns the size of the SDRAM
+ * that we have installed. This function is called by board_init_f
+ * in lib_ppc/board.c to initialize the memory and return what I
+ * found.
+ */
+long int initdram (int board_type)
+{
+	/* Configure the SDRAMS */
+
+	/* disable memory controller */
+	mtdcr (memcfga, mem_mcopt1);
+	mtdcr (memcfgd, 0x00000000);
+
+	udelay (500);
+
+	/* Clear SDRAM0_BESR0 (Bus Error Syndrome Register) */
+	mtdcr (memcfga, mem_besra);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Clear SDRAM0_BESR1 (Bus Error Syndrome Register) */
+	mtdcr (memcfga, mem_besrb);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Clear SDRAM0_ECCCFG (disable ECC) */
+	mtdcr (memcfga, mem_ecccf);
+	mtdcr (memcfgd, 0x00000000);
+
+	/* Clear SDRAM0_ECCESR (ECC Error Syndrome Register) */
+	mtdcr (memcfga, mem_eccerr);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Timing register: CASL=2, PTA=2, CTP=2, LDF=1, RFTA=5, RCD=2 */
+	mtdcr (memcfga, mem_sdtr1);
+	mtdcr (memcfgd, 0x010a4016);
+
+	/* Memory Bank 0 Config == BA=0x00000000, SZ=64M, AM=3, BE=1 */
+	mtdcr (memcfga, mem_mb0cf);
+	mtdcr (memcfgd, 0x00084001);
+
+	/* Memory Bank 1 Config == BA=0x04000000, SZ=64M, AM=3, BE=1 */
+	mtdcr (memcfga, mem_mb1cf);
+	mtdcr (memcfgd, 0x04084001);
+
+	/* Memory Bank 2 Config ==  BE=0 */
+	mtdcr (memcfga, mem_mb2cf);
+	mtdcr (memcfgd, 0x00000000);
+
+	/* Memory Bank 3 Config ==  BE=0 */
+	mtdcr (memcfga, mem_mb3cf);
+	mtdcr (memcfgd, 0x00000000);
+
+	/* refresh timer = 0x400  */
+	mtdcr (memcfga, mem_rtr);
+	mtdcr (memcfgd, 0x04000000);
+
+	/* Power management idle timer set to the default. */
+	mtdcr (memcfga, mem_pmit);
+	mtdcr (memcfgd, 0x07c00000);
+
+	udelay (500);
+
+	/* Enable banks (DCE=1, BPRF=1, ECCDD=1, EMDUL=1) */
+	mtdcr (memcfga, mem_mcopt1);
+	mtdcr (memcfgd, 0x80e00000);
+
+	return SDRAM_LEN;
+}
+
+/*
+ * The U-Boot core, as part of the initialization to prepare for
+ * loading the monitor into SDRAM, requests of this function that the
+ * memory be tested. Return 0 if the memory tests OK.
+ */
+int testdram (void)
+{
+	unsigned long idx;
+	unsigned val;
+	unsigned errors;
+	volatile unsigned long *sdram;
+
+#ifdef DEBUG
+	printf ("SDRAM Controller Registers --\n");
+
+	mtdcr (memcfga, mem_mcopt1);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_CFG   : 0x%08x\n", val);
+
+	mtdcr (memcfga, 0x24);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_STATUS: 0x%08x\n", val);
+
+	mtdcr (memcfga, mem_mb0cf);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_B0CR  : 0x%08x\n", val);
+
+	mtdcr (memcfga, mem_mb1cf);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_B1CR  : 0x%08x\n", val);
+
+	mtdcr (memcfga, mem_sdtr1);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_TR    : 0x%08x\n", val);
+
+	mtdcr (memcfga, mem_rtr);
+	val = mfdcr (memcfgd);
+	printf ("    SDRAM0_RTR   : 0x%08x\n", val);
+#endif
+
+	/* Wait for memory to be ready by testing MRSCMPbit
+	   bit. Really, there should already have been plenty of time,
+	   given it was started long ago. But, best to check. */
+	for (idx = 0; idx < 1000000; idx += 1) {
+		mtdcr (memcfga, 0x24);
+		val = mfdcr (memcfgd);
+		if (val & 0x80000000)
+			break;
+	}
+
+	if (!(val & 0x80000000)) {
+		printf ("SDRAM ERROR: SDRAM0_STATUS never set!\n");
+		return 1;
+	}
+
+	/* Start memory test. */
+	printf ("test: %u MB - ", SDRAM_LEN / 1048576);
+
+	sdram = (unsigned long *) CFG_SDRAM_BASE;
+
+	printf ("write - ");
+	for (idx = 2; idx < SDRAM_LEN / 4; idx += 2) {
+		sdram[idx + 0] = idx;
+		sdram[idx + 1] = ~idx;
+	}
+
+	printf ("read - ");
+	errors = 0;
+	for (idx = 2; idx < SDRAM_LEN / 4; idx += 2) {
+		if (sdram[idx + 0] != idx)
+			errors += 1;
+		if (sdram[idx + 1] != ~idx)
+			errors += 1;
+		if (errors > 0)
+			break;
+	}
+
+	if (errors > 0) {
+		printf ("NOT OK\n");
+		printf ("FIRST ERROR at %p: 0x%08lx:0x%08lx != 0x%08lx:0x%08lx\n",
+			sdram + idx, sdram[idx + 0], sdram[idx + 1], idx, ~idx);
+		return 1;
+	}
+
+	printf ("ok\n");
+	return 0;
+}