Add support for TQM8541/8555 boards, TQM85xx support reworked:

- Support for TQM8541/8555 boards added.
- Complete rework of TQM8540/8560 support.
- Common TQM85xx code now supports all current TQM85xx platforms
  (TQM8540/8541/8555/8560).
- DDR SDRAM size detection added.
- CAS latency default values can be overwritten by setting "serial#"
  to e.g. "ABC0001 casl=25" -> CAS latency 2.5 will be used.
  If problems are detected with this non default CAS latency,
  the defualt values will be used instead.
- FLASH size detection added.
- Moved FCC ethernet driver initialization behind TSEC driver init
  -> TSEC is first device.

Patch by Stefan Roese, 30 Nov 2005

1 files changed, 226 insertions, 0 deletions

diff --git a/board/tqm85xx/sdram.c b/board/tqm85xx/sdram.c
new file mode 100644
index 0000000000..9c1f087687
--- /dev/null
+++ b/board/tqm85xx/sdram.c
@@ -0,0 +1,226 @@
+/*
+ * (C) Copyright 2005
+ * Stefan Roese, DENX Software Engineering, sr@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 <asm/processor.h>
+#include <asm/immap_85xx.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+#include <spd.h>
+
+struct sdram_conf_s {
+	unsigned long size;
+	unsigned long reg;
+};
+
+typedef struct sdram_conf_s sdram_conf_t;
+
+sdram_conf_t ddr_cs_conf[] = {
+	{(512 << 20), 0x80000202},	/* 512MB, 14x10(4)	*/
+	{(256 << 20), 0x80000102},	/* 256MB, 13x10(4)	*/
+	{(128 << 20), 0x80000101},	/* 128MB, 13x9(4)	*/
+	{(64  << 20), 0x80000001},	/* 64MB,  12x9(4)	*/
+};
+
+#define	N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0]))
+
+int cas_latency(void);
+
+/*
+ * Autodetect onboard DDR SDRAM on 85xx platforms
+ *
+ * NOTE: Some of the hardcoded values are hardware dependant,
+ *       so this should be extended for other future boards
+ *       using this routine!
+ */
+long int sdram_setup(int casl)
+{
+	int i;
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile ccsr_ddr_t *ddr = &immap->im_ddr;
+	unsigned long cfg_ddr_timing1;
+	unsigned long cfg_ddr_mode;
+
+	/*
+	 * Disable memory controller.
+	 */
+	ddr->cs0_config = 0;
+	ddr->sdram_cfg = 0;
+
+	switch (casl) {
+	case 20:
+		cfg_ddr_timing1 = 0x47405331 | (3 << 16);
+		cfg_ddr_mode = 0x40020002 | (2 << 4);
+		break;
+
+	case 25:
+		cfg_ddr_timing1 = 0x47405331 | (4 << 16);
+		cfg_ddr_mode = 0x40020002 | (6 << 4);
+		break;
+
+	case 30:
+	default:
+		cfg_ddr_timing1 = 0x47405331 | (5 << 16);
+		cfg_ddr_mode = 0x40020002 | (3 << 4);
+		break;
+	}
+
+	ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
+	ddr->cs0_config = ddr_cs_conf[0].reg;
+	ddr->timing_cfg_1 = cfg_ddr_timing1;
+	ddr->timing_cfg_2 = 0x00000800;		/* P9-45,may need tuning */
+	ddr->sdram_mode = cfg_ddr_mode;
+	ddr->sdram_interval = 0x05160100;	/* autocharge,no open page */
+	ddr->err_disable = 0x0000000D;
+
+	asm ("sync;isync;msync");
+	udelay(1000);
+
+	ddr->sdram_cfg = 0xc2000000;		/* unbuffered,no DYN_PWR */
+	asm ("sync; isync; msync");
+	udelay(1000);
+
+	for (i=0; i<N_DDR_CS_CONF; i++) {
+		ddr->cs0_config = ddr_cs_conf[i].reg;
+
+		if (get_ram_size(0, ddr_cs_conf[i].size) == ddr_cs_conf[i].size) {
+			/*
+			 * OK, size detected -> all done
+			 */
+			return ddr_cs_conf[i].size;
+		}
+	}
+
+	return 0;				/* nothing found !		*/
+}
+
+void board_add_ram_info(int use_default)
+{
+	int casl;
+
+	if (use_default)
+		casl = CONFIG_DDR_DEFAULT_CL;
+	else
+		casl = cas_latency();
+
+	puts(" (CL=");
+	switch (casl) {
+	case 20:
+		puts("2)");
+		break;
+
+	case 25:
+		puts("2.5)");
+		break;
+
+	case 30:
+		puts("3)");
+		break;
+	}
+}
+
+long int initdram (int board_type)
+{
+	long dram_size = 0;
+	int casl;
+
+#if defined(CONFIG_DDR_DLL)
+	/*
+	 * This DLL-Override only used on TQM8540 and TQM8560
+	 */
+	{
+		volatile immap_t *immap = (immap_t *) CFG_IMMR;
+		volatile ccsr_gur_t *gur= &immap->im_gur;
+		int i,x;
+
+		x = 10;
+
+		/*
+		 * Work around to stabilize DDR DLL
+		 */
+		gur->ddrdllcr = 0x81000000;
+		asm("sync;isync;msync");
+		udelay (200);
+		while (gur->ddrdllcr != 0x81000100) {
+			gur->devdisr = gur->devdisr | 0x00010000;
+			asm("sync;isync;msync");
+			for (i=0; i<x; i++)
+				;
+			gur->devdisr = gur->devdisr & 0xfff7ffff;
+			asm("sync;isync;msync");
+			x++;
+		}
+	}
+#endif
+
+	casl = cas_latency();
+	dram_size = sdram_setup(casl);
+	if ((dram_size == 0) && (casl != CONFIG_DDR_DEFAULT_CL)) {
+		/*
+		 * Try again with default CAS latency
+		 */
+		puts("Problem with CAS lantency");
+		board_add_ram_info(1);
+		puts(", using default CL!\n");
+		casl = CONFIG_DDR_DEFAULT_CL;
+		dram_size = sdram_setup(casl);
+		puts("       ");
+	}
+
+	return dram_size;
+}
+
+#if defined(CFG_DRAM_TEST)
+int testdram (void)
+{
+	uint *pstart = (uint *) CFG_MEMTEST_START;
+	uint *pend = (uint *) CFG_MEMTEST_END;
+	uint *p;
+
+	printf ("SDRAM test phase 1:\n");
+	for (p = pstart; p < pend; p++)
+		*p = 0xaaaaaaaa;
+
+	for (p = pstart; p < pend; p++) {
+		if (*p != 0xaaaaaaaa) {
+			printf ("SDRAM test fails at: %08x\n", (uint) p);
+			return 1;
+		}
+	}
+
+	printf ("SDRAM test phase 2:\n");
+	for (p = pstart; p < pend; p++)
+		*p = 0x55555555;
+
+	for (p = pstart; p < pend; p++) {
+		if (*p != 0x55555555) {
+			printf ("SDRAM test fails at: %08x\n", (uint) p);
+			return 1;
+		}
+	}
+
+	printf ("SDRAM test passed.\n");
+	return 0;
+}
+#endif