diff options
Diffstat (limited to 'src/northbridge/intel/i82810/raminit.c')
| -rw-r--r-- | src/northbridge/intel/i82810/raminit.c | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/src/northbridge/intel/i82810/raminit.c b/src/northbridge/intel/i82810/raminit.c deleted file mode 100644 index 6fe4fb590a..0000000000 --- a/src/northbridge/intel/i82810/raminit.c +++ /dev/null @@ -1,463 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2007-2009 Uwe Hermann <uwe@hermann-uwe.de> - * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> - * Copyright (C) 2008-2009 Elia Yehuda <z4ziggy@gmail.com> - * - * 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. - */ - -#include <spd.h> -#include <delay.h> -#include <stdint.h> -#include <arch/io.h> -#include <device/pci_def.h> -#include <console/console.h> -#include "i82810.h" -#include "raminit.h" - -/*----------------------------------------------------------------------------- -Macros and definitions. ------------------------------------------------------------------------------*/ - -/* Debugging macros. */ -#if IS_ENABLED(CONFIG_DEBUG_RAM_SETUP) -#define PRINT_DEBUG(x...) printk(BIOS_DEBUG, x) -#define DUMPNORTH() dump_pci_device(PCI_DEV(0, 0, 0)) -#else -#define PRINT_DEBUG(x...) -#define DUMPNORTH() -#endif - -/* DRAMT[7:5] - SDRAM Mode Select (SMS). */ -#define RAM_COMMAND_SELF_REFRESH 0x0 /* Disable refresh */ -#define RAM_COMMAND_NORMAL 0x1 /* Refresh: 15.6/11.7us for 100/133MHz */ -#define RAM_COMMAND_NORMAL_FR 0x2 /* Refresh: 7.8/5.85us for 100/133MHz */ -#define RAM_COMMAND_NOP 0x4 /* NOP command */ -#define RAM_COMMAND_PRECHARGE 0x5 /* All bank precharge */ -#define RAM_COMMAND_MRS 0x6 /* Mode register set */ -#define RAM_COMMAND_CBR 0x7 /* CBR */ - -/* - * This table is used to translate the value read from SPD Byte 31 to a value - * the northbridge can understand in DRP, aka Rx52[7:4], [3:0]. Where most - * northbridges have some sort of simple calculation that can be done for this, - * I haven't yet figured out one for this northbridge. Until someone does, - * this table is necessary. - */ -static const u8 translate_spd_to_i82810[] = { - /* Note: 4MB sizes are not supported, so dual-sided DIMMs with a 4MB - * side can't be either, at least for now. - */ - /* TODO: For above case, only use the other side if > 4MB, and get some - * of these DIMMs to test it with. Same for unsupported 128/x sizes. - */ - - /* SPD Byte 31 Memory Size [Side 1/2] */ - 0xff, /* 0x01 No memory */ - 0xff, /* 0x01 4/0 */ - 0x01, /* 0x02 8/0 */ - 0xff, /* 0x03 8/4 */ - 0x04, /* 0x04 16/0 or 16 */ - 0xff, /* 0x05 16/4 */ - 0x05, /* 0x06 16/8 */ - 0xff, /* 0x07 Invalid */ - 0x07, /* 0x08 32/0 or 32 */ - 0xff, /* 0x09 32/4 */ - 0xff, /* 0x0A 32/8 */ - 0xff, /* 0x0B Invalid */ - 0x08, /* 0x0C 32/16 */ - 0xff, 0xff, 0xff, /* 0x0D-0F Invalid */ - 0x0a, /* 0x10 64/0 or 64 */ - 0xff, /* 0x11 64/4 */ - 0xff, /* 0x12 64/8 */ - 0xff, /* 0x13 Invalid */ - 0xff, /* 0x14 64/16 */ - 0xff, 0xff, 0xff, /* 0x15-17 Invalid */ - 0x0b, /* 0x18 64/32 */ - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x19-1f Invalid */ - 0x0d, /* 0x20 128/0 or 128 */ - /* These configurations are not supported by the i810 */ - 0xff, /* 0x21 128/4 */ - 0xff, /* 0x22 128/8 */ - 0xff, /* 0x23 Invalid */ - 0xff, /* 0x24 128/16 */ - 0xff, 0xff, 0xff, /* 0x25-27 Invalid */ - 0xff, /* 0x28 128/32 */ - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x29-2f Invalid */ - 0x0e, /* 0x30 128/64 */ - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, /* 0x31-3f Invalid */ - 0x0f, /* 0x40 256/0 or 256 */ - /* Anything larger is not supported by the 82810. */ -}; - -/* - * Table which returns the RAM size in MB when fed the DRP[7:4] or [3:0] value. - * Note that 2 is a value which the DRP should never be programmed to. - * Some size values appear twice, due to single-sided vs dual-sided banks. - */ -static const u16 translate_i82810_to_mb[] = { -/* DRP 0 1 (2) 3 4 5 6 7 8 9 A B C D E F */ -/* MB */0, 8, 0, 16, 16, 24, 32, 32, 48, 64, 64, 96, 128, 128, 192, 256, -}; - -/* Size of bank#0 for dual-sided DIMMs */ -static const u8 translate_i82810_to_bank[] = { -/* DRP 0 1 (2) 3 4 5 6 7 8 9 A B C D E F */ -/* MB */0, 0, 0, 8, 0, 16, 16, 0, 32, 32, 0, 64, 64, 0, 128, 128, -}; - -struct dimm_info { - u8 ds; /* dual-sided */ - u8 ss; /* single-sided */ - u8 size; -}; - -/*----------------------------------------------------------------------------- -SDRAM configuration functions. ------------------------------------------------------------------------------*/ - -/** - * Send the specified RAM command to all DIMMs. - * - * @param command The RAM command to send to the DIMM(s). - */ -static void do_ram_command(u8 command) -{ - u32 *addr, addr_offset; - u16 dimm_size, dimm_start, dimm_bank; - u8 reg8, drp; - int i, caslatency; - - /* Configure the RAM command. */ - reg8 = pci_read_config8(PCI_DEV(0, 0, 0), DRAMT); - reg8 &= 0x1f; /* Clear bits 7-5. */ - reg8 |= command << 5; - pci_write_config8(PCI_DEV(0, 0, 0), DRAMT, reg8); - - /* - * RAM_COMMAND_NORMAL affects only the memory controller and - * doesn't need to be "sent" to the DIMMs. - */ - if (command == RAM_COMMAND_NORMAL) - return; - - dimm_start = 0; - for (i = 0; i < DIMM_SOCKETS; i++) { - /* - * Calculate the address offset where we need to "send" the - * DIMM command to. For most commands the offset is 0, only - * RAM_COMMAND_MRS needs special values, see below. - * The final address offset bits depend on three things: - * - * (1) Some hardcoded values specified in the datasheet. - * (2) Which CAS latency we will use/set. This is the SMAA[4] - * bit, which is 1 for CL3, and 0 for CL2. The bitstring - * so far has the form '00000001X1010', X being SMAA[4]. - * (3) The DIMM to which we want to send the command. For - * DIMM0 no special handling is needed, but for DIMM1 we - * must invert the four bits SMAA[7:4] (see datasheet). - * - * Finally, the bitstring has to be shifted 3 bits to the left. - * See i810 datasheet pages 43, 85, and 86 for details. - */ - addr_offset = 0; - caslatency = 3; /* TODO: Dynamically get CAS latency later. */ - if (i == 0 && command == RAM_COMMAND_MRS && caslatency == 3) - addr_offset = 0x1d0; /* DIMM0, CL3, 0000111010000 */ - if (i == 1 && command == RAM_COMMAND_MRS && caslatency == 3) - addr_offset = 0x650; /* DIMM1, CL3, 0011001010000 */ - if (i == 0 && command == RAM_COMMAND_MRS && caslatency == 2) - addr_offset = 0x150; /* DIMM0, CL2, 0000101010000 */ - if (i == 1 && command == RAM_COMMAND_MRS && caslatency == 2) - addr_offset = 0x1a0; /* DIMM1, CL2, 0000110100000 */ - - drp = pci_read_config8(PCI_DEV(0, 0, 0), DRP); - drp = (drp >> (i * 4)) & 0x0f; - - dimm_size = translate_i82810_to_mb[drp]; - if (dimm_size) { - addr = (u32 *)((dimm_start * 1024 * 1024) + addr_offset); - PRINT_DEBUG(" Sending RAM command 0x%02x to 0x%p\n", reg8, addr); - read32(addr); - } - - dimm_bank = translate_i82810_to_bank[drp]; - if (dimm_bank) { - addr = (u32 *)(((dimm_start + dimm_bank) * 1024 * 1024) + addr_offset); - PRINT_DEBUG(" Sending RAM command 0x%02x to 0x%p\n", reg8, addr); - read32(addr); - } - - dimm_start += dimm_size; - } -} - -/*----------------------------------------------------------------------------- -DIMM-independent configuration functions. ------------------------------------------------------------------------------*/ - -/* - * Set DRP - DRAM Row Population Register (Device 0). - */ -static void spd_set_dram_size(void) -{ - /* The variables drp and dimm_size have to be ints since all the - * SMBus-related functions return ints, and its just easier this way. - */ - int i, drp, dimm_size; - - drp = 0x00; - - for (i = 0; i < DIMM_SOCKETS; i++) { - /* First check if a DIMM is actually present. */ - if (smbus_read_byte(DIMM0 + i, 2) == 4) { - printk(BIOS_DEBUG, "Found DIMM in slot %d\n", i); - - dimm_size = smbus_read_byte(DIMM0 + i, 31); - - printk(BIOS_DEBUG, "DIMM is %dMB\n", dimm_size * 4); - - /* The i810 can't handle DIMMs larger than 128MB per - * side. This will fail if the DIMM uses a - * non-supported DRAM tech, and can't be used until - * buffers are done dynamically. - * Note: the factory BIOS just dies if it spots this :D - */ - if (dimm_size > 32) { - printk(BIOS_ERR, "DIMM row sizes larger than 128MB not" - "supported on i810\n"); - printk - (BIOS_ERR, "Attempting to treat as 128MB DIMM\n"); - dimm_size = 32; - } else if (dimm_size < 0) { - /* On smbus error, set DIMM size to 0 */ - printk(BIOS_ERR, "Error reading DIMM size\n"); - dimm_size = 0; - } - - if (dimm_size > 0) { - /* This array is provided in raminit.h, because it got - * extremely messy. The above way is cleaner, but - * doesn't support any asymmetrical/odd configurations. - */ - dimm_size = translate_spd_to_i82810[dimm_size]; - - printk(BIOS_DEBUG, "After translation, dimm_size is %d\n", - dimm_size); - - /* If the DIMM is dual-sided, the DRP value is +2 */ - /* TODO: Figure out asymmetrical configurations. */ - if ((smbus_read_byte(DIMM0 + i, 127) | 0xf) == 0xff) { - printk(BIOS_DEBUG, "DIMM is dual-sided\n"); - dimm_size += 2; - } - } - } else { - printk(BIOS_DEBUG, "No DIMM found in slot %d\n", i); - - /* If there's no DIMM in the slot, set value to 0. */ - dimm_size = 0x00; - } - - /* Put in dimm_size to reflect the current DIMM. */ - drp |= dimm_size << (i * 4); - } - - printk(BIOS_DEBUG, "DRP calculated to 0x%02x\n", drp); - - pci_write_config8(PCI_DEV(0, 0, 0), DRP, drp); -} - -static void set_dram_timing(void) -{ - /* TODO, for now using default, hopefully safe values. */ - // pci_write_config8(PCI_DEV(0, 0, 0), DRAMT, 0x00); -} - -/* - * TODO: BUFF_SC needs to be set according to the DRAM tech (x8, x16, - * or x32), but the datasheet doesn't list all the details. Currently, it - * needs to be pulled from the output of 'lspci -xxx Rx92'. - * - * Common results (tested on actual hardware) are: - * - * (DRP: c = 128MB dual sided, d = 128MB single sided, f = 256MB dual sided) - * - * BUFF_SC TOM DRP DIMM0 DIMM1 - * ---------------------------------------------------------------------------- - * 0x3356 128MB 0x0c 128MB dual-sided - - * 0xcc56 128MB 0xc0 - 128MB dual-sided - * 0x77da 128MB 0x0d 128MB single-sided - - * 0xddda 128MB 0xd0 - 128MB single-sided - * 0x0001 256MB 0xcc 128MB dual-sided 128MB dual-sided - * 0x55c6 256MB 0xdd 128MB single-sided 128MB single-sided - * 0x4445 256MB 0xcd 128MB single-sided 128MB dual-sided - * 0x1145 256MB 0xdc 128MB dual-sided 128MB single-sided - * 0x3356 256MB 0x0f 256MB dual-sided - - * 0xcc56 256MB 0xf0 - 256MB dual-sided - * 0x0001 384MB 0xcf 256MB dual-sided 128MB dual-sided - * 0x0001 384MB 0xfc 128MB dual-sided 256MB dual-sided - * 0x1145 384MB 0xdf 256MB dual-sided 128MB single-sided - * 0x4445 384MB 0xfd 128MB single-sided 256MB dual-sided - * 0x0001 512MB 0xff 256MB dual-sided 256MB dual-sided - * - * See also: - * https://www.coreboot.org/pipermail/coreboot/2009-May/047966.html - */ -static void set_dram_buffer_strength(void) -{ - struct dimm_info d0, d1; - u16 buff_sc; - - /* Check first slot. */ - d0.size = d0.ds = d0.ss = 0; - if (smbus_read_byte(DIMM0, SPD_MEMORY_TYPE) == SPD_MEMORY_TYPE_SDRAM) { - d0.size = smbus_read_byte(DIMM0, SPD_BANK_DENSITY); - d0.ds = smbus_read_byte(DIMM0, SPD_NUM_DIMM_BANKS) > 1; - d0.ss = !d0.ds; - } - - /* Check second slot. */ - d1.size = d1.ds = d1.ss = 0; - if (smbus_read_byte(DIMM0 + 1, SPD_MEMORY_TYPE) - == SPD_MEMORY_TYPE_SDRAM) { - d1.size = smbus_read_byte(DIMM0 + 1, SPD_BANK_DENSITY); - d1.ds = smbus_read_byte(DIMM0 + 1, SPD_NUM_DIMM_BANKS) > 1; - d1.ss = !d1.ds; - } - - buff_sc = 0; - - /* Tame the beast... */ - if ((d0.ds && d1.ds) || (d0.ds && d1.ss) || (d0.ss && d1.ds)) - buff_sc |= 1; - if ((d0.size && !d1.size) || (!d0.size && d1.size) || (d0.ss && d1.ss)) - buff_sc |= 1 << 1; - if ((d0.ds && !d1.size) || (!d0.size && d1.ds) || (d0.ss && d1.ss) - || (d0.ds && d1.ss) || (d0.ss && d1.ds)) - buff_sc |= 1 << 2; - if ((d0.ss && !d1.size) || (!d0.size && d1.ss)) - buff_sc |= 1 << 3; - if ((d0.size && !d1.size) || (!d0.size && d1.size)) - buff_sc |= 1 << 4; - if ((d0.ds && !d1.size) || (!d0.size && d1.ds) || (d0.ds && d1.ss) - || (d0.ss && d1.ds)) - buff_sc |= 1 << 6; - if ((d0.ss && !d1.size) || (!d0.size && d1.ss) || (d0.ss && d1.ss)) - buff_sc |= 3 << 6; - if ((!d0.size && d1.ss) || (d0.ds && d1.ss) || (d0.ss && d1.ss)) - buff_sc |= 1 << 8; - if (d0.size && !d1.size) - buff_sc |= 3 << 8; - if ((d0.ss && !d1.size) || (d0.ss && d1.ss) || (d0.ss && d1.ds)) - buff_sc |= 1 << 10; - if (!d0.size && d1.size) - buff_sc |= 3 << 10; - if ((d0.size && !d1.size) || (d0.ss && !d1.size) || (!d0.size && d1.ss) - || (d0.ss && d1.ss) || (d0.ds && d1.ss)) - buff_sc |= 1 << 12; - if (d0.size && !d1.size) - buff_sc |= 1 << 13; - if ((!d0.size && d1.size) || (d0.ss && !d1.size) || (d0.ss && d1.ss) - || (d0.ss && d1.ds)) - buff_sc |= 1 << 14; - if (!d0.size && d1.size) - buff_sc |= 1 << 15; - - printk(BIOS_DEBUG, "BUFF_SC calculated to 0x%04x\n", buff_sc); - - pci_write_config16(PCI_DEV(0, 0, 0), BUFF_SC, buff_sc); -} - -/*----------------------------------------------------------------------------- -Public interface. ------------------------------------------------------------------------------*/ - -void sdram_set_registers(void) -{ - u8 reg8; - u16 did; - - did = pci_read_config16(PCI_DEV(0, 0, 0), PCI_DEVICE_ID); - - /* Ideally, this should be R/W for as many ranges as possible. */ - pci_write_config8(PCI_DEV(0, 0, 0), PAMR, 0xff); - - /* Set size for onboard-VGA framebuffer. */ - reg8 = pci_read_config8(PCI_DEV(0, 0, 0), SMRAM); - reg8 &= 0x3f; /* Disable graphics (for now). */ -#if CONFIG_VIDEO_MB - if (CONFIG_VIDEO_MB == 512) - reg8 |= (1 << 7); /* Enable graphics (512KB RAM). */ - else if (CONFIG_VIDEO_MB == 1) - reg8 |= (1 << 7) | (1 << 6); /* Enable graphics (1MB RAM). */ -#endif - pci_write_config8(PCI_DEV(0, 0, 0), SMRAM, reg8); - - /* MISSC2: Bits 1, 2, 6, 7 must be set for VGA (see datasheet). */ - reg8 = pci_read_config8(PCI_DEV(0, 0, 0), MISSC2); - reg8 |= (1 << 1); /* Instruction Parser Unit-Level Clock Gating */ - reg8 |= (1 << 2); /* Palette Load Select */ - if (did == 0x7124) { - /* Bits 6 and 7 are only available on 82810E (not 82810). */ - reg8 |= (1 << 6); /* Text Immediate Blit */ - reg8 |= (1 << 7); /* Must be 1 as per datasheet. */ - } - pci_write_config8(PCI_DEV(0, 0, 0), MISSC2, reg8); -} - -void sdram_set_spd_registers(void) -{ - spd_set_dram_size(); - set_dram_buffer_strength(); - set_dram_timing(); -} - -/** - * Enable SDRAM. - */ -void sdram_enable(void) -{ - int i; - - /* 1. Apply NOP. */ - PRINT_DEBUG("RAM Enable 1: Apply NOP\n"); - do_ram_command(RAM_COMMAND_NOP); - udelay(200); - - /* 2. Precharge all. Wait tRP. */ - PRINT_DEBUG("RAM Enable 2: Precharge all\n"); - do_ram_command(RAM_COMMAND_PRECHARGE); - udelay(1); - - /* 3. Perform 8 refresh cycles. Wait tRC each time. */ - PRINT_DEBUG("RAM Enable 3: CBR\n"); - for (i = 0; i < 8; i++) { - do_ram_command(RAM_COMMAND_CBR); - udelay(1); - } - - /* 4. Mode register set. Wait two memory cycles. */ - PRINT_DEBUG("RAM Enable 4: Mode register set\n"); - do_ram_command(RAM_COMMAND_MRS); - udelay(2); - - /* 5. Normal operation (enables refresh at 15.6usec). */ - PRINT_DEBUG("RAM Enable 5: Normal operation\n"); - do_ram_command(RAM_COMMAND_NORMAL); - udelay(1); - - PRINT_DEBUG("Northbridge following SDRAM init:\n"); - DUMPNORTH(); -} |