Added support for TQM834x boards.

1 files changed, 416 insertions, 0 deletions

diff --git a/board/tqm834x/tqm834x.c b/board/tqm834x/tqm834x.c
new file mode 100644
index 0000000..9e620eb
--- /dev/null
+++ b/board/tqm834x/tqm834x.c
@@ -0,0 +1,416 @@
+/*
+ * (C) Copyright 2005
+ * 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 <ioports.h>
+#include <mpc83xx.h>
+#include <asm/mpc8349_pci.h>
+#include <i2c.h>
+#include <spd.h>
+#include <miiphy.h>
+#include <asm-ppc/mmu.h>
+
+#if defined(CONFIG_PCI)
+#include <pci.h>
+#endif
+
+#define IOSYNC			asm("eieio")
+#define ISYNC			asm("isync")
+#define SYNC			asm("sync")
+#define FPW			FLASH_PORT_WIDTH
+#define FPWV			FLASH_PORT_WIDTHV
+
+#define DDR_MAX_SIZE_PER_CS	0x20000000
+
+#if defined(DDR_CASLAT_20)
+#define TIMING_CASLAT		TIMING_CFG1_CASLAT_20
+#define MODE_CASLAT		DDR_MODE_CASLAT_20
+#else
+#define TIMING_CASLAT		TIMING_CFG1_CASLAT_25
+#define MODE_CASLAT		DDR_MODE_CASLAT_25
+#endif
+
+#define INITIAL_CS_CONFIG	(CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \
+				CSCONFIG_COL_BIT_9)
+
+/* Global variable used to store detected number of banks */
+int tqm834x_num_flash_banks;
+
+/* External definitions */
+ulong flash_get_size (ulong base, int banknum);
+extern flash_info_t flash_info[];
+extern long spd_sdram (void);
+
+/* Local functions */
+static int detect_num_flash_banks(void);
+static long int get_ddr_bank_size(short cs, volatile long *base);
+static void set_cs_bounds(short cs, long base, long size);
+static void set_cs_config(short cs, long config);
+static void set_ddr_config(void);
+
+/* Local variable */
+static volatile immap_t *im = (immap_t *)CFG_IMMRBAR;
+
+/**************************************************************************
+ * Board initialzation after relocation to RAM. Used to detect the number
+ * of Flash banks on TQM834x.
+ */
+int board_early_init_r (void) {
+	/* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */
+	if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
+		return 0;
+	
+	/* detect the number of Flash banks */
+	return detect_num_flash_banks();
+}
+
+/**************************************************************************
+ * DRAM initalization and size detection
+ */
+long int initdram (int board_type)
+{
+	long bank_size;
+	long size;
+	int cs;
+
+	/* during size detection, set up the max DDRLAW size */
+	im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE;
+	im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G);
+
+	/* set CS bounds to maximum size */
+	for(cs = 0; cs < 4; ++cs) {
+		set_cs_bounds(cs,
+			CFG_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS),
+			DDR_MAX_SIZE_PER_CS);
+
+		set_cs_config(cs, INITIAL_CS_CONFIG);
+	}
+
+	/* configure ddr controller */
+	set_ddr_config();
+
+	udelay(200);
+	
+	/* enable DDR controller */
+	im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN |
+		SDRAM_CFG_SREN |
+		SDRAM_CFG_SDRAM_TYPE_DDR);
+	SYNC;
+
+	/* size detection */
+	debug("\n");
+	size = 0;
+	for(cs = 0; cs < 4; ++cs) {
+		debug("\nDetecting Bank%d\n", cs);
+
+		bank_size = get_ddr_bank_size(cs,
+			(volatile long*)(CFG_DDR_BASE + size));
+		size += bank_size;
+
+		debug("DDR Bank%d size: %d MiB\n\n", cs, bank_size >> 20);
+
+		/* exit if less than one bank */
+		if(size < DDR_MAX_SIZE_PER_CS) break;
+	}
+
+	return size;
+}
+
+/**************************************************************************
+ * checkboard()
+ */
+int checkboard (void)
+{
+	puts("Board: TQM834x\n");
+
+#ifdef CONFIG_PCI
+	printf("PCI1:  32 bit, %d MHz (compiled)\n",
+			CONFIG_SYS_CLK_FREQ / 1000000);
+#else
+	printf("PCI1:  disabled\n");
+#endif
+
+	return 0;
+}
+
+#if defined(CONFIG_PCI)
+/*
+ * Initialize PCI Devices, report devices found
+ */
+
+/* FIXME: No PCI support */
+
+#endif /* CONFIG_PCI */
+
+/**************************************************************************
+ * pci_init_board()
+ */
+void
+pci_init_board(void)
+{
+#ifdef CONFIG_PCI
+	extern void pci_mpc83xx_init(volatile struct pci_controller *hose);
+
+	pci_mpc83xx_init(hose);
+#endif /* CONFIG_PCI */
+}
+
+/**************************************************************************
+ *
+ * Local functions
+ *
+ *************************************************************************/
+
+/**************************************************************************
+ * Detect the number of flash banks (1 or 2). Store it in
+ * a global variable tqm834x_num_flash_banks.
+ * Bank detection code based on the Monitor code.
+ */
+static int detect_num_flash_banks(void)
+{
+	typedef unsigned long FLASH_PORT_WIDTH;
+	typedef volatile unsigned long FLASH_PORT_WIDTHV;
+	FPWV *bank1_base;
+	FPWV *bank2_base;
+	FPW bank1_read;
+	FPW bank2_read;
+	ulong bank1_size;
+	ulong bank2_size;
+	ulong total_size;
+
+	tqm834x_num_flash_banks = 2;	/* assume two banks */
+	
+	/* Get bank 1 and 2 information */
+	bank1_size = flash_get_size(CFG_FLASH_BASE, 0);
+	debug("Bank1 size: %lu\n", bank1_size);
+	bank2_size = flash_get_size(CFG_FLASH_BASE + bank1_size, 1);
+	debug("Bank2 size: %lu\n", bank2_size);
+	total_size = bank1_size + bank2_size;
+
+	if (bank2_size > 0) {
+		/* Seems like we've got bank 2, but maybe it's mirrored 1 */
+
+		/* Set the base addresses */
+		bank1_base = (FPWV *) (CFG_FLASH_BASE);
+		bank2_base = (FPWV *) (CFG_FLASH_BASE + bank1_size);
+
+		/* Put bank 2 into CFI command mode and read */
+		bank2_base[0x55] = 0x00980098;
+		IOSYNC;
+		ISYNC;
+		bank2_read = bank2_base[0x10];
+
+		/* Read from bank 1 (it's in read mode) */
+		bank1_read = bank1_base[0x10];
+
+		/* Reset Flash */
+		bank1_base[0] = 0x00F000F0;
+		bank2_base[0] = 0x00F000F0;
+
+		if (bank2_read == bank1_read) {
+			/*
+			 * Looks like just one bank, but not sure yet. Let's
+			 * read from bank 2 in autosoelect mode.
+			 */
+			bank2_base[0x0555] = 0x00AA00AA;
+			bank2_base[0x02AA] = 0x00550055;
+			bank2_base[0x0555] = 0x00900090;
+			IOSYNC;
+			ISYNC;
+			bank2_read = bank2_base[0x10];
+
+			/* Read from bank 1 (it's in read mode) */
+			bank1_read = bank1_base[0x10];
+
+			/* Reset Flash */
+			bank1_base[0] = 0x00F000F0;
+			bank2_base[0] = 0x00F000F0;
+
+			if (bank2_read == bank1_read) {
+				/*
+				 * In both CFI command and autoselect modes,
+				 * we got the some data reading from Flash.
+				 * There is only one mirrored bank.
+				 */
+				tqm834x_num_flash_banks = 1;
+				total_size = bank1_size;
+			}
+		}
+	}
+
+	debug("Number of flash banks detected: %d\n", tqm834x_num_flash_banks);
+
+	/* set OR0 and BR0 */
+	im->lbus.bank[0].or = CFG_OR_TIMING_FLASH |
+		(-(total_size) & OR_GPCM_AM);
+	im->lbus.bank[0].br = (CFG_FLASH_BASE & BR_BA) |
+		(BR_MS_GPCM | BR_PS_32 | BR_V);
+
+	return (0);
+}
+
+/*************************************************************************
+ * Detect the size of a ddr bank. Sets CS bounds and CS config accordingly.
+ */
+static long int get_ddr_bank_size(short cs, volatile long *base)
+{
+	/* This array lists all valid DDR SDRAM configurations, with
+	 * Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM).
+	 * The last entry has to to have size equal 0 and is igonred during
+	 * autodection. Bank sizes must be in increasing order of size
+	 */
+	struct {
+		long row;
+		long col;
+		long size;
+	} conf[] = {
+		{CSCONFIG_ROW_BIT_12,	CSCONFIG_COL_BIT_8,	32 << 20},
+		{CSCONFIG_ROW_BIT_12,	CSCONFIG_COL_BIT_9,	64 << 20},
+		{CSCONFIG_ROW_BIT_12,	CSCONFIG_COL_BIT_10,	128 << 20},
+		{CSCONFIG_ROW_BIT_13,	CSCONFIG_COL_BIT_9,	128 << 20},
+		{CSCONFIG_ROW_BIT_13,	CSCONFIG_COL_BIT_10,	256 << 20},
+		{CSCONFIG_ROW_BIT_13,	CSCONFIG_COL_BIT_11,	512 << 20},
+		{CSCONFIG_ROW_BIT_14,	CSCONFIG_COL_BIT_10,	512 << 20},
+		{CSCONFIG_ROW_BIT_14,	CSCONFIG_COL_BIT_11,	1024 << 20},
+		{0,			0,			0}
+	};
+
+	int i;
+	int detected;
+	long size;
+
+	detected = -1;
+	for(i = 0; conf[i].size != 0; ++i) {
+
+		/* set sdram bank configuration */
+		set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row);
+
+		debug("Getting RAM size...\n");
+		size = get_ram_size(base, DDR_MAX_SIZE_PER_CS);
+
+		if((size == conf[i].size) && (i == detected + 1))
+			detected = i;
+
+		debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n",
+			conf[i].row,
+			conf[i].col,
+			conf[i].size >> 20,
+			base,
+			size >> 20);
+	}
+
+	if(detected == -1){
+		/* disable empty cs */
+		debug("\nNo valid configurations for CS%d, disabling...\n", cs);
+		set_cs_config(cs, 0);
+		return 0;
+	}
+		
+	debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n",
+			conf[detected].row, conf[detected].col, conf[detected].size >> 20, base);
+	
+	/* configure cs ro detected params */
+	set_cs_config(cs, CSCONFIG_EN | conf[detected].row |
+			conf[detected].col);
+
+	set_cs_bounds(cs, (long)base, conf[detected].size);
+
+	return(conf[detected].size);
+}
+
+/**************************************************************************
+ * Sets DDR bank CS bounds.
+ */
+static void set_cs_bounds(short cs, long base, long size)
+{
+	debug("Setting bounds %08x, %08x for cs %d\n", base, size, cs);
+	if(size == 0){
+		im->ddr.csbnds[cs].csbnds = 0x00000000;
+	} else {
+		im->ddr.csbnds[cs].csbnds =
+			((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+			(((base + size - 1) >> CSBNDS_EA_SHIFT) &
+				CSBNDS_EA);
+	}
+	SYNC;
+}
+
+/**************************************************************************
+ * Sets DDR banks CS configuration.
+ * config == 0x00000000 disables the CS.
+ */
+static void set_cs_config(short cs, long config)
+{
+	debug("Setting config %08x for cs %d\n", config, cs);
+	im->ddr.cs_config[cs] = config;
+	SYNC;
+}
+
+/**************************************************************************
+ * Sets DDR clocks, timings and configuration.
+ */
+static void set_ddr_config(void) {
+	/* clock control */
+	im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN |
+		DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05;
+	SYNC;
+	
+	/* timing configuration */
+	im->ddr.timing_cfg_1 =
+		(4 << TIMING_CFG1_PRETOACT_SHIFT) |
+		(7 << TIMING_CFG1_ACTTOPRE_SHIFT) |
+		(4 << TIMING_CFG1_ACTTORW_SHIFT)  |
+		(5 << TIMING_CFG1_REFREC_SHIFT)   |
+		(3 << TIMING_CFG1_WRREC_SHIFT)    |
+		(3 << TIMING_CFG1_ACTTOACT_SHIFT) |
+		(1 << TIMING_CFG1_WRTORD_SHIFT)   |
+		(TIMING_CFG1_CASLAT & TIMING_CASLAT);
+
+	im->ddr.timing_cfg_2 =
+		TIMING_CFG2_CPO_DEF |
+		(2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT);
+	SYNC;
+
+	/* don't enable DDR controller yet */
+	im->ddr.sdram_cfg =
+		SDRAM_CFG_SREN |
+		SDRAM_CFG_SDRAM_TYPE_DDR;
+	SYNC;
+	
+	/* Set SDRAM mode */
+	im->ddr.sdram_mode =
+		((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) <<
+			SDRAM_MODE_ESD_SHIFT) |
+		((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) <<
+			SDRAM_MODE_SD_SHIFT) |
+		((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) &
+			MODE_CASLAT);
+	SYNC;
+
+	/* Set fast SDRAM refresh rate */
+	im->ddr.sdram_interval =
+		(DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) |
+		(DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT);
+	SYNC;
+}