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Various Intel 82810/82810E changes which allow onboard VGA to work. 

At the same time also make the 82810 code handle 82810E.

 - Set SMRAM register according to CONFIG_VIDEO_MB value:
    - 512 means 512 KB
    - 1 means 1 MB
    - Every other value for CONFIG_VIDEO_MB (e.g. 0) disables VGA.
   This is not very clean, changing CONFIG_VIDEO_MB to CONFIG_VIDEO_KB
   in a future patch may be nicer.

 - Set MISSC2 register bits as required per datasheet to make VGA work.
   The code handles both 82810 and 82810E.

 - northbridge.c: Add __pci_driver entry for the Intel 82810E.

Also:

 - Rename PAM register #define to PAMR as per datasheet.

 - Drop unused/commented code for now.

 - Don't explicitly set GMCHCFG for now, the default works ok. We'll
   have to figure out the proper/ideal settings later.

The code is based on a patch from Elia Yehuda <z4ziggy@gmail.com> but
has been modified quite a bit for correctness and minimalism.

Tested on hardware with a slightly modified MS-6178 target,
patches to enable onboard-VGA for MS-6178 will follow.

Signed-off-by: Elia Yehuda <z4ziggy@gmail.com>
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4398 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Elia Yehuda 2009-07-05 15:50:30 +00:00 committed by Uwe Hermann
parent bd4f2f808c
commit 76a88d0805
3 changed files with 48 additions and 39 deletions
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2
src/northbridge/intel/i82810/i82810.h
View File

@ -35,7 +35,7 @@
*/
#define GMCHCFG 0x50 /* GMCH Configuration */
#define PAM 0x51 /* Programmable Attributes */
#define PAMR 0x51 /* Programmable Attributes */
#define DRP 0x52 /* DRAM Row Population */
#define DRAMT 0x53 /* DRAM Timing */
#define FDHC 0x58 /* Fixed DRAM Hole Control */

23
src/northbridge/intel/i82810/northbridge.c
View File

@ -46,12 +46,20 @@ static struct device_operations northbridge_operations = {
.ops_pci = 0,
};
static const struct pci_driver northbridge_driver __pci_driver = {
/* Intel 82810/82810-DC100 */
static const struct pci_driver i810_northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x7120,
};
/* Intel 82810E */
static const struct pci_driver i810e_northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x7124,
};
static void ram_resource(device_t dev, unsigned long index,
unsigned long basek, unsigned long sizek)
{
@ -139,6 +147,19 @@ static void pci_domain_set_resources(device_t dev)
/* Convert tomk from MB to KB. */
tomk = tomk << 10;
#ifdef CONFIG_VIDEO_MB
/* Check for VGA reserved memory. */
if (CONFIG_VIDEO_MB == 512) {
tomk -= 512;
printk_debug("Allocating %s RAM for VGA\n", "512KB");
} else if (CONFIG_VIDEO_MB == 1) {
tomk -= 1024 ;
printk_debug("Allocating %s RAM for VGA\n", "1MB");
} else {
printk_debug("Allocating %s RAM for VGA\n", "0MB");
}
#endif
/* Compute the top of Low memory. */
tolmk = pci_tolm >> 10;
if (tolmk >= tomk) {

62
src/northbridge/intel/i82810/raminit.c
View File

@ -1,9 +1,9 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2008 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2007-2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com>
* Copyright (C) 2008 Elia Yehuda <z4ziggy@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
@ -360,45 +360,33 @@ Public interface.
static void sdram_set_registers(void)
{
unsigned long val;
u8 reg8;
u16 reg16, did;
/* TODO */
pci_write_config8(PCI_DEV(0, 0, 0), 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
*/
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), PAM, 0xff);
pci_write_config8(PCI_DEV(0, 0, 0), PAMR, 0xff);
/* Enabling the VGA Framebuffer currently screws up the rest of the boot.
* Disable for now */
/* 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 == 512)
reg8 |= (1 << 7); /* Enable graphics (512KB RAM). */
else if (CONFIG_VIDEO_MB == 1)
reg8 |= (1 << 7) | (1 << 6); /* Enable graphics (1MB RAM). */
pci_write_config8(PCI_DEV(0, 0, 0), SMRAM, reg8);
/* Enable 1MB framebuffer. */
//pci_write_config8(PCI_DEV(0, 0, 0), SMRAM, 0xC0);
//val = pci_read_config16(PCI_DEV(0, 0, 0), MISSC);
/* Preserve reserved bits. */
//val &= 0xff06;
/* Set graphics cache window to 32MB, no power throttling. */
//val |= 0x0001;
//pci_write_config16(PCI_DEV(0, 0, 0), MISSC, val);
//val = pci_read_config8(PCI_DEV(0, 0, 0), MISSC2);
/* Enable graphics palettes and clock gating (not optional!) */
//val |= 0x06;
//pci_write_config8(PCI_DEV(0, 0, 0), MISSC2, val);
/* 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);
}
static void sdram_set_spd_registers(void)
@ -437,7 +425,7 @@ static void sdram_enable(void)
do_ram_command(RAM_COMMAND_MRS);
udelay(2);
/* 5. Normal operation (enables refresh) */
/* 5. Normal operation (enables refresh at 15.6usec). */
PRINT_DEBUG("RAM Enable 5: Normal operation\r\n");
do_ram_command(RAM_COMMAND_NORMAL);
udelay(1);