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Diffstat (limited to 'board/prodrive/p3mx/sdram_init.c')
-rw-r--r--board/prodrive/p3mx/sdram_init.c434
1 files changed, 434 insertions, 0 deletions
diff --git a/board/prodrive/p3mx/sdram_init.c b/board/prodrive/p3mx/sdram_init.c
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+++ b/board/prodrive/p3mx/sdram_init.c
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+/*
+ * (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);
+}
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