[PATCH] Add support for Prodrive P3M750 & P3M7448 (P3Mx) boards

This patch adds support for the Prodrive P3M750 (PPC750 & MV64460)
and the P3M7448 (MPC7448 & MV64460) PMC modules. Both modules are
quite similar and share the same board directory "prodrive/p3mx"
and the same config file "p3mx.h".

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 433 insertions, 0 deletions

diff --git a/board/prodrive/p3mx/sdram_init.c b/board/prodrive/p3mx/sdram_init.c
new file mode 100644
index 0000000..b4556de
--- /dev/null
+++ b/board/prodrive/p3mx/sdram_init.c
@@ -0,0 +1,433 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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
+ */
+
+/*************************************************************************
+ * adaption for the Marvell DB64460 Board
+ * Ingo Assmus (ingo.assmus@keymile.com)
+ *************************************************************************/
+
+/* sdram_init.c - automatic memory sizing */
+
+#include <common.h>
+#include <74xx_7xx.h>
+#include "../../Marvell/include/memory.h"
+#include "../../Marvell/include/pci.h"
+#include "../../Marvell/include/mv_gen_reg.h"
+#include <net.h>
+
+#include "eth.h"
+#include "mpsc.h"
+#include "../../Marvell/common/i2c.h"
+#include "64460.h"
+#include "mv_regs.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#undef	DEBUG
+#define	MAP_PCI
+
+#ifdef DEBUG
+#define DP(x) x
+#else
+#define DP(x)
+#endif
+
+int set_dfcdlInit (void);	/* setup delay line of Mv64460 */
+int mvDmaIsChannelActive (int);
+int mvDmaSetMemorySpace (ulong, ulong, ulong, ulong, ulong);
+int mvDmaTransfer (int, ulong, ulong, ulong, ulong);
+
+#define D_CACHE_FLUSH_LINE(addr, offset)				\
+	{								\
+		__asm__ __volatile__ ("dcbf %0,%1" : : "r" (addr), "r" (offset)); \
+	}
+
+int memory_map_bank (unsigned int bankNo,
+		     unsigned int bankBase, unsigned int bankLength)
+{
+#ifdef MAP_PCI
+	PCI_HOST host;
+#endif
+
+#ifdef DEBUG
+	if (bankLength > 0)
+		printf ("mapping bank %d at %08x - %08x\n",
+			bankNo, bankBase, bankBase + bankLength - 1);
+	else
+		printf ("unmapping bank %d\n", bankNo);
+#endif
+
+	memoryMapBank (bankNo, bankBase, bankLength);
+
+#ifdef MAP_PCI
+	for (host = PCI_HOST0; host <= PCI_HOST1; host++) {
+		const int features =
+			PREFETCH_ENABLE |
+			DELAYED_READ_ENABLE |
+			AGGRESSIVE_PREFETCH |
+			READ_LINE_AGGRESSIVE_PREFETCH |
+			READ_MULTI_AGGRESSIVE_PREFETCH |
+			MAX_BURST_4 | PCI_NO_SWAP;
+
+		pciMapMemoryBank (host, bankNo, bankBase, bankLength);
+
+		pciSetRegionSnoopMode (host, bankNo, PCI_SNOOP_WB, bankBase,
+				       bankLength);
+
+		pciSetRegionFeatures (host, bankNo, features, bankBase,
+				      bankLength);
+	}
+#endif
+
+	return 0;
+}
+
+/*
+ * Check memory range for valid RAM. A simple memory test determines
+ * the actually available RAM size between addresses `base' and
+ * `base + maxsize'. Some (not all) hardware errors are detected:
+ * - short between address lines
+ * - short between data lines
+ */
+long int dram_size (long int *base, long int maxsize)
+{
+	volatile long int *addr, *b = base;
+	long int cnt, val, save1, save2;
+
+#define STARTVAL (1<<20)	/* start test at 1M */
+	for (cnt = STARTVAL / sizeof (long); cnt < maxsize / sizeof (long);
+	     cnt <<= 1) {
+		addr = base + cnt;	/* pointer arith! */
+
+		save1 = *addr;	/* save contents of addr */
+		save2 = *b;	/* save contents of base */
+
+		*addr = cnt;	/* write cnt to addr */
+		*b = 0;		/* put null at base */
+
+		/* check at base address */
+		if ((*b) != 0) {
+			*addr = save1;	/* restore *addr */
+			*b = save2;	/* restore *b */
+			return (0);
+		}
+		val = *addr;	/* read *addr */
+		val = *addr;	/* read *addr */
+
+		*addr = save1;
+		*b = save2;
+
+		if (val != cnt) {
+			DP (printf
+			    ("Found %08x  at Address %08x (failure)\n",
+			     (unsigned int) val, (unsigned int) addr));
+			/* fix boundary condition.. STARTVAL means zero */
+			if (cnt == STARTVAL / sizeof (long))
+				cnt = 0;
+			return (cnt * sizeof (long));
+		}
+	}
+
+	return maxsize;
+}
+
+#define SDRAM_NORMAL			0x0
+#define SDRAM_PRECHARGE_ALL		0x1
+#define SDRAM_REFRESH_ALL		0x2
+#define SDRAM_MODE_REG_SETUP		0x3
+#define SDRAM_XTEN_MODE_REG_SETUP	0x4
+#define SDRAM_NOP			0x5
+#define SDRAM_SELF_REFRESH		0x7
+
+long int initdram (int board_type)
+{
+	int tmp;
+	int start;
+	ulong size;
+	ulong memSpaceAttr;
+	ulong dest;
+
+	/* first disable all banks */
+	memory_map_bank(0, 0, 0);
+	memory_map_bank(1, 0, 0);
+	memory_map_bank(2, 0, 0);
+	memory_map_bank(3, 0, 0);
+
+	/* calibrate delay lines */
+	set_dfcdlInit();
+
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_NOP); 		/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* SDRAM controller configuration */
+#ifdef CONFIG_MV64460_ECC
+	GT_REG_WRITE(MV64460_SDRAM_CONFIG,		0x58201400);	/* 0x1400 */
+#else
+	GT_REG_WRITE(MV64460_SDRAM_CONFIG,		0x58200400);	/* 0x1400 */
+#endif
+	GT_REG_WRITE(MV64460_D_UNIT_CONTROL_LOW,	0xC3000540);	/* 0x1404  */
+	GT_REG_WRITE(MV64460_D_UNIT_CONTROL_HIGH,	0x0300F777);	/* 0x1424 */
+	GT_REG_WRITE(MV64460_SDRAM_TIMING_CONTROL_LOW,	0x01712220);	/* 0x1408 */
+	GT_REG_WRITE(MV64460_SDRAM_TIMING_CONTROL_HIGH, 0x0000005D);	/* 0x140C */
+	GT_REG_WRITE(MV64460_SDRAM_ADDR_CONTROL,	0x00000012);	/* 0x1410 */
+	GT_REG_WRITE(MV64460_SDRAM_OPEN_PAGES_CONTROL,	0x00000001);	/* 0x1414 */
+
+	/* SDRAM drive strength */
+	GT_REG_WRITE(MV64460_SDRAM_ADDR_CTRL_PADS_CALIBRATION, 0x80000000); /* 0x14C0 */
+	GT_REG_WRITE(MV64460_SDRAM_ADDR_CTRL_PADS_CALIBRATION, 0x80000008); /* 0x14C0 */
+	GT_REG_WRITE(MV64460_SDRAM_DATA_PADS_CALIBRATION, 0x80000000);      /* 0x14C4 */
+	GT_REG_WRITE(MV64460_SDRAM_DATA_PADS_CALIBRATION, 0x80000008);      /* 0x14C4 */
+
+	/* setup SDRAM device registers */
+
+	/* precharge all */
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_PRECHARGE_ALL);	/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* enable DLL */
+	GT_REG_WRITE(MV64460_EXTENDED_DRAM_MODE, 0x00000000);			/* 0x1420 */
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_XTEN_MODE_REG_SETUP);	/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* reset DLL */
+	GT_REG_WRITE(MV64460_SDRAM_MODE, 0x00000132);	/* 0x141C */
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_MODE_REG_SETUP);	/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* precharge all */
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_PRECHARGE_ALL);	/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* wait for 2 auto refresh commands */
+	udelay(20);
+
+	/* un-reset DLL */
+	GT_REG_WRITE(MV64460_SDRAM_MODE, 0x00000032);	/* 0x141C */
+	GT_REG_WRITE(MV64460_SDRAM_OPERATION, SDRAM_MODE_REG_SETUP);	/* 0x1418 */
+	do {
+		tmp = GTREGREAD(MV64460_SDRAM_OPERATION);
+	} while(tmp != 0x0);
+
+	/* wait 200 cycles */
+	udelay(2);  /* FIXME  make this dynamic for the system clock */
+
+	/* SDRAM init done */
+	memory_map_bank(0, CFG_SDRAM_BASE,  (256 << 20));
+#ifdef CFG_SDRAM1_BASE
+	memory_map_bank(1, CFG_SDRAM1_BASE, (256 << 20));
+#endif
+
+	/* DUNIT_MMASK: enable SnoopHitEn bit to avoid errata CPU-#4
+	 */
+	tmp = GTREGREAD(MV64460_D_UNIT_MMASK);				/* 0x14B0 */
+	GT_REG_WRITE(MV64460_D_UNIT_MMASK, tmp | 0x2);
+
+	start = (0 << 20);
+#ifdef CONFIG_P3M750
+	size = (512 << 20);
+#elif defined (CONFIG_P3M7448)
+	size = (128 << 20);
+#endif
+
+#ifdef CONFIG_MV64460_ECC
+	memSpaceAttr = ((~(BIT0 << 0)) & 0xf) << 8;
+	mvDmaSetMemorySpace (0, 0, memSpaceAttr, start, size);
+	for (dest = start; dest < start + size; dest += _8M) {
+		mvDmaTransfer (0, start, dest, _8M,
+			       BIT8 /*DMA_DTL_128BYTES */  |
+			       BIT3 /*DMA_HOLD_SOURCE_ADDR */ |
+			       BIT11 /*DMA_BLOCK_TRANSFER_MODE */ );
+		while (mvDmaIsChannelActive (0));
+	}
+#endif
+
+	return (size);
+}
+
+void board_add_ram_info(int use_default)
+{
+	u32 val;
+
+	puts(" (CL=");
+	switch ((GTREGREAD(MV64460_SDRAM_MODE) >> 4) & 0x7) {
+	case 0x2:
+		puts("2");
+		break;
+	case 0x3:
+		puts("3");
+		break;
+	case 0x5:
+		puts("1.5");
+		break;
+	case 0x6:
+		puts("2.5");
+		break;
+	}
+
+	val = GTREGREAD(MV64460_SDRAM_CONFIG);
+
+	puts(", ECC ");
+	if (val & 0x00001000)
+		puts("enabled)");
+	else
+		puts("not enabled)");
+}
+
+/*
+ * mvDmaIsChannelActive - Check if IDMA channel is active
+ *
+ * channel      = IDMA channel number from 0 to 7
+ */
+int mvDmaIsChannelActive (int channel)
+{
+        ulong data;
+
+        data = GTREGREAD (MV64460_DMA_CHANNEL0_CONTROL + 4 * channel);
+        if (data & BIT14)	/* activity status */
+                return 1;
+
+        return 0;
+}
+
+/*
+ * mvDmaSetMemorySpace - Set a DMA memory window for the DMA's address decoding
+ *                       map.
+ *
+ * memSpace	= IDMA memory window number from 0 to 7
+ * trg_if	= Target interface:
+ *		  0x0 DRAM
+ *		  0x1 Device Bus
+ *		  0x2 Integrated SDRAM (or CPU bus 60x only)
+ *		  0x3 PCI0
+ *		  0x4 PCI1
+ * attr		= IDMA attributes (see MV datasheet)
+ * base_addr	= Sets up memory window for transfers
+ *
+ */
+int mvDmaSetMemorySpace (ulong memSpace,
+			 ulong trg_if,
+			 ulong attr, ulong base_addr, ulong size)
+{
+	ulong temp;
+
+	/* The base address must be aligned to the size.  */
+	if (base_addr % size != 0)
+		return 0;
+
+	if (size >= 0x10000) {	 /* 64K */
+		size &= 0xffff0000;
+		base_addr = (base_addr & 0xffff0000);
+		/* Set the new attributes */
+		GT_REG_WRITE (MV64460_DMA_BASE_ADDR_REG0 + memSpace * 8,
+			      (base_addr | trg_if | attr));
+		GT_REG_WRITE ((MV64460_DMA_SIZE_REG0 + memSpace * 8),
+			      (size - 1) & 0xffff0000);
+		temp = GTREGREAD (MV64460_DMA_BASE_ADDR_ENABLE_REG);
+		GT_REG_WRITE (DMA_BASE_ADDR_ENABLE_REG,
+			      (temp & ~(BIT0 << memSpace)));
+		return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * mvDmaTransfer - Transfer data from src_addr to dst_addr on one of the 4
+ *                 DMA channels.
+ *
+ * channel      = IDMA channel number from 0 to 3
+ * destAddr	= Destination address
+ * sourceAddr	= Source address
+ * size		= Size in bytes
+ * command	= See MV datasheet
+ *
+ */
+int mvDmaTransfer (int channel, ulong sourceAddr,
+		   ulong destAddr, ulong size, ulong command)
+{
+	ulong engOffReg = 0;	/* Engine Offset Register */
+
+	if (size > 0xffff)
+		command = command | BIT31;	/* DMA_16M_DESCRIPTOR_MODE */
+	command = command | ((command >> 6) & 0x7);
+	engOffReg = channel * 4;
+	GT_REG_WRITE (MV64460_DMA_CHANNEL0_BYTE_COUNT + engOffReg, size);
+	GT_REG_WRITE (MV64460_DMA_CHANNEL0_SOURCE_ADDR + engOffReg, sourceAddr);
+	GT_REG_WRITE (MV64460_DMA_CHANNEL0_DESTINATION_ADDR + engOffReg, destAddr);
+	command = command |
+		BIT12   |			/* DMA_CHANNEL_ENABLE */
+		BIT9;				/* DMA_NON_CHAIN_MODE */
+	/* Activate DMA channel By writting to mvDmaControlRegister */
+	GT_REG_WRITE (MV64460_DMA_CHANNEL0_CONTROL + engOffReg, command);
+	return 1;
+}
+
+/****************************************************************************************
+ *			       SDRAM INIT						*
+ *  This procedure detect all Sdram types: 64, 128, 256, 512 Mbit, 1Gbit and 2Gb	*
+ *		 This procedure fits only the Atlantis					*
+ *											*
+ ***************************************************************************************/
+
+/****************************************************************************************
+ *			       DFCDL initialize MV643xx Design Considerations		*
+ *											*
+ ***************************************************************************************/
+int set_dfcdlInit (void)
+{
+	int i;
+
+	/* Values from MV64460 User Manual */
+	unsigned int dfcdl_tbl[] = { 0x00000000, 0x00000001, 0x00000042, 0x00000083,
+				     0x000000c4, 0x00000105, 0x00000146, 0x00000187,
+				     0x000001c8, 0x00000209, 0x0000024a, 0x0000028b,
+				     0x000002cc, 0x0000030d, 0x0000034e, 0x0000038f,
+				     0x000003d0, 0x00000411, 0x00000452, 0x00000493,
+				     0x000004d4, 0x00000515, 0x00000556, 0x00000597,
+				     0x000005d8, 0x00000619, 0x0000065a, 0x0000069b,
+				     0x000006dc, 0x0000071d, 0x0000075e, 0x0000079f,
+				     0x000007e0, 0x00000821, 0x00000862, 0x000008a3,
+				     0x000008e4, 0x00000925, 0x00000966, 0x000009a7,
+				     0x000009e8, 0x00000a29, 0x00000a6a, 0x00000aab,
+				     0x00000aec, 0x00000b2d, 0x00000b6e, 0x00000baf,
+				     0x00000bf0, 0x00000c31, 0x00000c72, 0x00000cb3,
+				     0x00000cf4, 0x00000d35, 0x00000d76, 0x00000db7,
+				     0x00000df8, 0x00000e39, 0x00000e7a, 0x00000ebb,
+				     0x00000efc, 0x00000f3d, 0x00000f7e, 0x00000fbf };
+
+	for (i = 0; i < 64; i++)
+		GT_REG_WRITE (SRAM_DATA0, dfcdl_tbl[i]);
+	GT_REG_WRITE (DFCDL_CONFIG0, 0x00300000);	/* enable dynamic delay line updating */
+
+	return (0);
+}