diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/i82810/Config.lb | 22 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/chip.h | 25 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/debug.c | 35 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/i82810.h | 59 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/northbridge.c | 217 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/northbridge.h | 26 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/raminit.c | 327 | ||||
| -rw-r--r-- | src/northbridge/intel/i82810/raminit.h | 90 |
8 files changed, 801 insertions, 0 deletions
diff --git a/src/northbridge/intel/i82810/Config.lb b/src/northbridge/intel/i82810/Config.lb new file mode 100644 index 0000000000..4701d5d336 --- /dev/null +++ b/src/northbridge/intel/i82810/Config.lb @@ -0,0 +1,22 @@ +## +## This file is part of the LinuxBIOS project. +## +## Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. +## +## 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +config chip.h +object northbridge.o diff --git a/src/northbridge/intel/i82810/chip.h b/src/northbridge/intel/i82810/chip.h new file mode 100644 index 0000000000..6187fde469 --- /dev/null +++ b/src/northbridge/intel/i82810/chip.h @@ -0,0 +1,25 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +struct northbridge_intel_i82810_config +{ +}; + +extern struct chip_operations northbridge_intel_i82810_ops; diff --git a/src/northbridge/intel/i82810/debug.c b/src/northbridge/intel/i82810/debug.c new file mode 100644 index 0000000000..bcb60e2b0a --- /dev/null +++ b/src/northbridge/intel/i82810/debug.c @@ -0,0 +1,35 @@ + +static void dump_spd_registers(const struct mem_controller *ctrl) +{ + int i; + print_debug("\r\n"); + for(i = 0; i < 4; i++) { + unsigned device; + device = ctrl->channel0[i]; + if (device) { + int j; + print_debug("dimm: "); + print_debug_hex8(i); + print_debug(".0: "); + print_debug_hex8(device); + for(j = 0; j < 256; j++) { + int status; + unsigned char byte; + if ((j & 0xf) == 0) { + print_debug("\r\n"); + print_debug_hex8(j); + print_debug(": "); + } + status = smbus_read_byte(device, j); + if (status < 0) { + print_debug("bad device\r\n"); + break; + } + byte = status & 0xff; + print_debug_hex8(byte); + print_debug_char(' '); + } + print_debug("\r\n"); + } + } +} diff --git a/src/northbridge/intel/i82810/i82810.h b/src/northbridge/intel/i82810/i82810.h new file mode 100644 index 0000000000..0b406cead4 --- /dev/null +++ b/src/northbridge/intel/i82810/i82810.h @@ -0,0 +1,59 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * Datasheet: + * - Name: Intel 810 Chipset: + * 82810/82810-DC100 Graphics and Memory Controller Hub (GMCH) + * - URL: http://www.intel.com/design/chipsets/datashts/290656.htm + * - PDF: ftp://download.intel.com/design/chipsets/datashts/29065602.pdf + * - Order Number: 290656-002 + */ + +/* + * PCI Configuration Registers. + * + * Any addresses between 0x00 and 0xff not listed below are reserved and + * should not be touched. + */ + +#define VID 0x00 /* Vendor Identification */ +#define DID 0x02 /* Device Identification */ +#define PCICMD 0x04 /* PCI Command Register */ +#define PCISTS 0x06 /* PCI Status Register */ +#define RID 0x08 /* Revision Identification */ +#define SUBC 0x0a /* Sub-Class Code */ +#define BCC 0x0b /* Base Class Code */ +#define MLT 0x0d /* Master Latency Timer */ +#define HDR 0x0e /* Header Type */ +#define SVID 0x2c /* Subsystem Vendor Identification */ +#define SID 0x2e /* Subsystem Identification */ +#define CAPPTR 0x34 /* Capabilities Pointer */ + +/* TODO: Descriptions */ +#define GMCHCFG 0x50 +#define PAM 0x51 +#define DRP 0x52 +#define DRAMT 0x53 +#define FDHC 0x58 +#define SMRAM 0x70 /* System Management RAM Control */ +#define MISSC 0x72 +#define MISSC2 0x80 +#define BUFF_SC 0x92 diff --git a/src/northbridge/intel/i82810/northbridge.c b/src/northbridge/intel/i82810/northbridge.c new file mode 100644 index 0000000000..9758be39f7 --- /dev/null +++ b/src/northbridge/intel/i82810/northbridge.c @@ -0,0 +1,217 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <bitops.h> +#include "chip.h" +#include "northbridge.h" +#include "i82810.h" + +static void northbridge_init(device_t dev) +{ + printk_spew("Northbridge init\n"); +} + +static struct device_operations northbridge_operations = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = northbridge_init, + .enable = 0, + .ops_pci = 0, +}; + +static struct pci_driver northbridge_driver __pci_driver = { + .ops = &northbridge_operations, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x7120, +}; + +#define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM) + +static void pci_domain_read_resources(device_t dev) +{ + struct resource *resource; + unsigned reg; + + /* Initialize the system wide io space constraints */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); + resource->base = 0x400; + resource->limit = 0xffffUL; + resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; + + /* Initialize the system wide memory resources constraints */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); + resource->limit = 0xffffffffULL; + resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; +} + +static void ram_resource(device_t dev, unsigned long index, + unsigned long basek, unsigned long sizek) +{ + struct resource *resource; + + if (!sizek) { + return; + } + resource = new_resource(dev, index); + resource->base = ((resource_t)basek) << 10; + resource->size = ((resource_t)sizek) << 10; + resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \ + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; +} + +static void tolm_test(void *gp, struct device *dev, struct resource *new) +{ + struct resource **best_p = gp; + struct resource *best; + best = *best_p; + if (!best || (best->base > new->base)) { + best = new; + } + *best_p = best; +} + +static uint32_t find_pci_tolm(struct bus *bus) +{ + struct resource *min; + uint32_t tolm; + min = 0; + search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min); + tolm = 0xffffffffUL; + if (min && tolm > min->base) { + tolm = min->base; + } + return tolm; +} + +/* 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 int 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, +}; + +static void pci_domain_set_resources(device_t dev) +{ + device_t mc_dev; + uint32_t pci_tolm; + + pci_tolm = find_pci_tolm(&dev->link[0]); + mc_dev = dev->link[0].children; + + if (mc_dev) { + /* Figure out which areas are/should be occupied by RAM. + * This is all computed in kilobytes and converted to/from + * the memory controller right at the edges. + * Having different variables in different units is + * too confusing to get right. Kilobytes are good up to + * 4 Terabytes of RAM... + */ + unsigned long tomk, tolmk; + int idx; + int drp_value; + + /* First get the value for DIMM 0. */ + drp_value = pci_read_config8(mc_dev, DRP); + /* Translate it to MB and add to tomk. */ + tomk = (unsigned long)(translate_i82810_to_mb[drp_value & 0xf]); + /* Now do the same for DIMM 1. */ + drp_value = drp_value >> 4; // >>= 4; //? mess with later + tomk += (unsigned long)(translate_i82810_to_mb[drp_value]); + + printk_debug("Setting RAM size to %d MB\n", tomk); + + /* Convert tomk from MB to KB. */ + tomk = tomk << 10; + + /* Compute the top of Low memory. */ + tolmk = pci_tolm >> 10; + if (tolmk >= tomk) { + /* The PCI hole does does not overlap the memory. */ + tolmk = tomk; + } + + /* Report the memory regions. */ + idx = 10; + ram_resource(dev, idx++, 0, 640); + ram_resource(dev, idx++, 1024, tolmk - 1024); + } + assign_resources(&dev->link[0]); +} + +static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) +{ + max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); + return max; +} + +static struct device_operations pci_domain_ops = { + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = enable_childrens_resources, + .init = 0, + .scan_bus = pci_domain_scan_bus, +}; + +static void cpu_bus_init(device_t dev) +{ + initialize_cpus(&dev->link[0]); +} + +static void cpu_bus_noop(device_t dev) +{ +} + +static struct device_operations cpu_bus_ops = { + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, +}; + +static void enable_dev(struct device *dev) +{ + struct device_path path; + + /* Set the operations if it is a special bus type */ + if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { + dev->ops = &pci_domain_ops; + pci_set_method(dev); + } + else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { + dev->ops = &cpu_bus_ops; + } +} + +struct chip_operations northbridge_intel_i82810_ops = { + CHIP_NAME("Intel 82810 Northbridge") + .enable_dev = enable_dev, +}; diff --git a/src/northbridge/intel/i82810/northbridge.h b/src/northbridge/intel/i82810/northbridge.h new file mode 100644 index 0000000000..43db8395e5 --- /dev/null +++ b/src/northbridge/intel/i82810/northbridge.h @@ -0,0 +1,26 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef NORTHBRIDGE_INTEL_I82810_NORTHBRIDGE_H +#define NORTHBRIDGE_INTEL_I82810_NORTHBRIDGE_H + +extern unsigned int i82810_scan_root_bus(device_t root, unsigned int max); + +#endif /* NORTHBRIDGE_INTEL_I82810_NORTHBRIDGE_H */ diff --git a/src/northbridge/intel/i82810/raminit.c b/src/northbridge/intel/i82810/raminit.c new file mode 100644 index 0000000000..55102dbba6 --- /dev/null +++ b/src/northbridge/intel/i82810/raminit.c @@ -0,0 +1,327 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de> + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <spd.h> +#include <sdram_mode.h> +#include <delay.h> +#include "i82810.h" + +/*----------------------------------------------------------------------------- +Macros and definitions. +-----------------------------------------------------------------------------*/ + +/* Uncomment this to enable debugging output. */ +// #define DEBUG_RAM_SETUP 1 + +/* Debugging macros. */ +#if defined(DEBUG_RAM_SETUP) +#define PRINT_DEBUG(x) print_debug(x) +#define PRINT_DEBUG_HEX8(x) print_debug_hex8(x) +#define PRINT_DEBUG_HEX16(x) print_debug_hex16(x) +#define PRINT_DEBUG_HEX32(x) print_debug_hex32(x) +#define DUMPNORTH() dump_pci_device(PCI_DEV(0, 0, 0)) +#else +#define PRINT_DEBUG(x) +#define PRINT_DEBUG_HEX8(x) +#define PRINT_DEBUG_HEX16(x) +#define PRINT_DEBUG_HEX32(x) +#define DUMPNORTH() +#endif + +/* DRAMT[7:5] - SDRAM Mode Select (SMS). */ +#define RAM_COMMAND_SELF_REFRESH 0x0 /* IE disable refresh */ +#define RAM_COMMAND_NORMAL 0x1 /* Normal refresh, 15.6us/11.7us for 100/133MHz */ +#define RAM_COMMAND_NORMAL_FR 0x2 /* Fast refresh, 7.8us/5.85us for 100/133MHz */ +#define RAM_COMMAND_NOP 0x4 +#define RAM_COMMAND_PRECHARGE 0x5 +#define RAM_COMMAND_MRS 0x6 +#define RAM_COMMAND_CBR 0x7 + +/*----------------------------------------------------------------------------- +SDRAM configuration functions. +-----------------------------------------------------------------------------*/ + +/** + * Send the specified RAM command to all DIMMs. + * + * @param Memory controller + * @param TODO + * @param TODO + */ +static void do_ram_command(const struct mem_controller *ctrl, uint32_t command, + uint32_t addr_offset, uint32_t row_offset) +{ + int i; + uint8_t reg; + + /* TODO: Support for multiple DIMMs. */ + + /* Configure the RAM command. */ + reg = pci_read_config8(ctrl->d0, DRAMT); + reg &= 0x1f; /* Clear bits 7-5. */ + reg |= command << 5; + pci_write_config8(ctrl->d0, DRAMT, reg); + + /* RAM_COMMAND_NORMAL affects only the memory controller and + doesn't need to be "sent" to the DIMMs. */ + /* if (command == RAM_COMMAND_NORMAL) return; */ + + PRINT_DEBUG(" Sending RAM command 0x"); + PRINT_DEBUG_HEX8(reg); + PRINT_DEBUG(" to 0x"); + PRINT_DEBUG_HEX32(0 + addr_offset); // FIXME + PRINT_DEBUG("\r\n"); + + /* Read from (DIMM start address + addr_offset). */ + read32(0 + addr_offset); //first offset is always 0 + read32(row_offset + addr_offset); +} + +/*----------------------------------------------------------------------------- +DIMM-independant configuration functions. +-----------------------------------------------------------------------------*/ + +static void spd_set_dram_size(const struct mem_controller *ctrl, uint32_t row_offset) +{ + /* 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(ctrl->channel0[i], 2) == 4) { + print_debug("Found DIMM in slot "); + print_debug_hex8(i); + print_debug("\r\n"); + + dimm_size = smbus_read_byte(ctrl->channel0[i], 31); + + /* WISHLIST: would be nice to display it as decimal? */ + print_debug("DIMM is 0x"); + print_debug_hex8(dimm_size * 4); + print_debug("MB\r\n"); + + /* 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) { + print_err("DIMM row sizes larger than 128MB not" + "supported on i810\r\n"); + print_err("Attempting to treat as 128MB DIMM\r\n"); + dimm_size = 32; + } + + /* Set the row offset, in KBytes (should this be Kbits?) */ + /* Note that this offset is the start of the next row. */ + row_offset = (dimm_size * 4 * 1024); + + /* This is the way I was doing this, it's provided mainly + * as an alternative to the "new" way. + */ + + #if 0 + /* 8MB */ + if(dimm_size == 0x2) dimm_size = 0x1; + /* 16MB */ + else if(dimm_size == 0x4) dimm_size = 0x4; + /* 32MB */ + else if(dimm_size == 0x8) dimm_size = 0x7; + /* 64 MB */ + else if(dimm_size == 0x10) dimm_size = 0xa; + /* 128 MB */ + else if(dimm_size == 0x20) dimm_size = 0xd; + else print_debug("Ram Size not supported\r\n"); + #endif + + /* This array is provided in raminit.h, because it got + * extremely messy. The above way is cleaner, but + * doesn't support any asymetrical/odd configurations. + */ + dimm_size = translate_spd_to_i82810[dimm_size]; + + print_debug("After translation, dimm_size is 0x"); + print_debug_hex8(dimm_size); + print_debug("\r\n"); + + /* If the DIMM is dual-sided, the DRP value is +2 */ + /* TODO: Figure out asymetrical configurations */ + if ((smbus_read_byte(ctrl->channel0[i], 127) | 0xf) == 0xff) { + print_debug("DIMM is dual-sided\r\n"); + dimm_size += 2; + } + } else { + print_debug("No DIMM found in slot "); + print_debug_hex8(i); + print_debug("\r\n"); + + /* If there's no DIMM in the slot, set the value to 0. */ + dimm_size = 0x00; + } + + /* Put in dimm_size to reflect the current DIMM. */ + drp |= dimm_size << (i * 4); + } + + print_debug("DRP calculated to 0x"); + print_debug_hex8(drp); + print_debug("\r\n"); + + pci_write_config8(ctrl->d0, DRP, drp); +} + +static void set_dram_timing(const struct mem_controller *ctrl) +{ + /* TODO, for now using default, hopefully safe values. */ + // pci_write_config8(ctrl->d0, DRAMT, 0x00); +} + +static void set_dram_buffer_strength(const struct mem_controller *ctrl) +{ + /* TODO: This needs to be set according to the DRAM tech + * (x8, x16, or x32). Argh, Intel provides no docs on this! + * Currently, it needs to be pulled from the output of + * lspci -xxx Rx92 + */ + pci_write_config16(ctrl->d0, BUFF_SC, 0x77da); +} + +/*----------------------------------------------------------------------------- +Public interface. +-----------------------------------------------------------------------------*/ + +/** + * TODO. + * + * @param Memory controller + */ +static void sdram_set_registers(const struct mem_controller *ctrl) +{ + unsigned long val; + + /* TODO */ + pci_write_config8(ctrl->d0, GMCHCFG, 0x60); + + /* PAMR: Programmable Attributes Register + * Every pair of bits controls an address range: + * 00 = Disabled, all accesses are forwarded to the ICH + * 01 = Read Only + * 10 = Write Only + * 11 = Read/Write + + * Bit Range + * 7:6 000F0000 - 000FFFFF + * 5:4 000E0000 - 000EFFFF + * 3:2 000D0000 - 000DFFFF + * 1:0 000C0000 - 000CFFFF + */ + + /* Ideally, this should be R/W for as many ranges as possible. */ + pci_write_config8(ctrl->d0, PAM, 0x00); + + /* Enable 1MB framebuffer. */ + pci_write_config8(ctrl->d0, SMRAM, 0xC0); + + val = pci_read_config16(ctrl->d0, MISSC); + /* Preserve reserved bits. */ + val &= 0xff06; + /* Set graphics cache window to 32MB, no power throttling. */ + val |= 0x0001; + pci_write_config16(ctrl->d0, MISSC, val); + + val = pci_read_config8(ctrl->d0, MISSC2); + /* Enable graphics palettes and clock gating (not optional!) */ + val |= 0x06; + pci_write_config8(ctrl->d0, MISSC2, val); +} + +/** + * TODO. + * + * @param Memory controller + */ +static void sdram_set_spd_registers(const struct mem_controller *ctrl) +{ + /* spd_set_dram_size() moved into sdram_enable() to prevent having + * to pass a variable between here and there. + */ + set_dram_buffer_strength(ctrl); + + set_dram_timing(ctrl); +} + +/** + * Enable SDRAM. + * + * @param Number of controllers + * @param Memory controller + */ +static void sdram_enable(int controllers, const struct mem_controller *ctrl) +{ + int i; + + /* Todo: this will currently work with either one dual sided or two + * single sided DIMMs. Needs to work with 2 dual sided DIMMs in the + * long run. + */ + uint32_t row_offset; + + spd_set_dram_size(ctrl, row_offset); + + /* 1. Apply NOP. */ + PRINT_DEBUG("RAM Enable 1: Apply NOP\r\n"); + do_ram_command(ctrl, RAM_COMMAND_NOP, 0, row_offset); + udelay(200); + + /* 2. Precharge all. Wait tRP. */ + PRINT_DEBUG("RAM Enable 2: Precharge all\r\n"); + do_ram_command(ctrl, RAM_COMMAND_PRECHARGE, 0, row_offset); + udelay(1); + + /* 3. Perform 8 refresh cycles. Wait tRC each time. */ + PRINT_DEBUG("RAM Enable 3: CBR\r\n"); + do_ram_command(ctrl, RAM_COMMAND_CBR, 0, row_offset); + for (i = 0; i < 8; i++) { + read32(0); + read32(row_offset); + udelay(1); + } + + /* 4. Mode register set. Wait two memory cycles. */ + PRINT_DEBUG("RAM Enable 4: Mode register set\r\n"); + do_ram_command(ctrl, RAM_COMMAND_MRS, 0x1d0, row_offset); + udelay(2); + + /* 5. Normal operation (enables refresh) */ + PRINT_DEBUG("RAM Enable 5: Normal operation\r\n"); + do_ram_command(ctrl, RAM_COMMAND_NORMAL, 0, row_offset); + udelay(1); + + PRINT_DEBUG("Northbridge following SDRAM init:\r\n"); + DUMPNORTH(); +} diff --git a/src/northbridge/intel/i82810/raminit.h b/src/northbridge/intel/i82810/raminit.h new file mode 100644 index 0000000000..43edd837d6 --- /dev/null +++ b/src/northbridge/intel/i82810/raminit.h @@ -0,0 +1,90 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef NORTHBRIDGE_INTEL_I82810_RAMINIT_H +#define NORTHBRIDGE_INTEL_I82810_RAMINIT_H + +/* The i810 supports max 2 dual-sided DIMMs. */ +#define DIMM_SOCKETS 2 + +struct mem_controller { + device_t d0; + uint16_t channel0[DIMM_SOCKETS]; +}; + + +#endif /* NORTHBRIDGE_INTEL_I82810_RAMINIT_H */ + +/* The following table has been bumped over to this header to avoid clutter in + * raminit.c. It's 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. + */ + +/* TODO: Find a better way of doing this */ + +static const uint8_t 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 i810 */ +}; |