GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

northbridge/via/cn700: Add some delays during raminit 

Otherwise, it locks up quickly. Not sure which ones are actually needed
and why, couldn't bisect it into removing even a single one.

The factory BIOS on a Neoware G170 does 200 0xed reads between setting
the registers too.

Change-Id: I6aa38768d84dd42c9c720c917a99e6b4b1e03427
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-on: https://review.coreboot.org/18893
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Lubomir Rintel 2017-02-21 12:52:34 +01:00 committed by Martin Roth
parent 3eec9dda1f
commit b31a066e0d
1 changed files with 46 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
src/northbridge/via/cn700/raminit.c
View File

@ -50,6 +50,12 @@ static void do_ram_command(pci_devfn_t dev, u8 command)
pci_write_config8(dev, DRAM_MISC_CTL, reg);
}
static void c7_pci_write_config8(pci_devfn_t dev, u8 reg, u8 val)
{
udelay(200);
pci_write_config8(dev, reg, val);
}
/**
* Configure the bus between the CPU and the northbridge. This might be able to
* be moved to post-ram code in the future. For the most part, these registers
@ -66,17 +72,17 @@ static void c7_cpu_setup(pci_devfn_t dev)
{
/* Host bus interface registers (D0F2 0x50-0x67) */
/* Request phase control */
pci_write_config8(dev, 0x50, 0x88);
c7_pci_write_config8(dev, 0x50, 0x88);
/* CPU Interface Control */
pci_write_config8(dev, 0x51, 0x7a);
pci_write_config8(dev, 0x52, 0x6f);
c7_pci_write_config8(dev, 0x51, 0x7a);
c7_pci_write_config8(dev, 0x52, 0x6f);
/* Arbitration */
pci_write_config8(dev, 0x53, 0x88);
c7_pci_write_config8(dev, 0x53, 0x88);
/* Miscellaneous Control */
pci_write_config8(dev, 0x54, 0x1e);
pci_write_config8(dev, 0x55, 0x16);
c7_pci_write_config8(dev, 0x54, 0x1e);
c7_pci_write_config8(dev, 0x55, 0x16);
/* Write Policy */
pci_write_config8(dev, 0x56, 0x01);
c7_pci_write_config8(dev, 0x56, 0x01);
/* Miscellaneous Control */
/*
* DRAM Operating Frequency (bits 7:5)
@ -86,58 +92,59 @@ static void c7_cpu_setup(pci_devfn_t dev)
* 110/111 : Reserved
*/
/* CPU Miscellaneous Control */
pci_write_config8(dev, 0x59, 0x44);
c7_pci_write_config8(dev, 0x59, 0x44);
/* Write Policy */
pci_write_config8(dev, 0x5d, 0xb2);
c7_pci_write_config8(dev, 0x5d, 0xb2);
/* Bandwidth Timer */
pci_write_config8(dev, 0x5e, 0x88);
c7_pci_write_config8(dev, 0x5e, 0x88);
/* CPU Miscellaneous Control */
pci_write_config8(dev, 0x5f, 0xc7);
c7_pci_write_config8(dev, 0x5f, 0xc7);
/* Line DRDY# Timing Control */
pci_write_config8(dev, 0x60, 0xff);
pci_write_config8(dev, 0x61, 0xff);
pci_write_config8(dev, 0x62, 0x0f);
c7_pci_write_config8(dev, 0x60, 0xff);
c7_pci_write_config8(dev, 0x61, 0xff);
c7_pci_write_config8(dev, 0x62, 0x0f);
/* QW DRDY# Timing Control */
pci_write_config8(dev, 0x63, 0xff);
pci_write_config8(dev, 0x64, 0xff);
pci_write_config8(dev, 0x65, 0x0f);
c7_pci_write_config8(dev, 0x63, 0xff);
c7_pci_write_config8(dev, 0x64, 0xff);
c7_pci_write_config8(dev, 0x65, 0x0f);
/* Read Line Burst DRDY# Timing Control */
pci_write_config8(dev, 0x66, 0xff);
pci_write_config8(dev, 0x67, 0x30);
c7_pci_write_config8(dev, 0x66, 0xff);
c7_pci_write_config8(dev, 0x67, 0x30);
/* Host Bus I/O Circuit (see datasheet) */
/* Host Address Pullup/down Driving */
pci_write_config8(dev, 0x70, 0x11);
pci_write_config8(dev, 0x71, 0x11);
pci_write_config8(dev, 0x72, 0x11);
pci_write_config8(dev, 0x73, 0x11);
c7_pci_write_config8(dev, 0x70, 0x11);
c7_pci_write_config8(dev, 0x71, 0x11);
c7_pci_write_config8(dev, 0x72, 0x11);
c7_pci_write_config8(dev, 0x73, 0x11);
/* Miscellaneous Control */
pci_write_config8(dev, 0x74, 0x35);
c7_pci_write_config8(dev, 0x74, 0x35);
/* AGTL+ I/O Circuit */
pci_write_config8(dev, 0x75, 0x28);
c7_pci_write_config8(dev, 0x75, 0x28);
/* AGTL+ Compensation Status */
pci_write_config8(dev, 0x76, 0x74);
c7_pci_write_config8(dev, 0x76, 0x74);
/* AGTL+ Auto Compensation Offest */
pci_write_config8(dev, 0x77, 0x00);
c7_pci_write_config8(dev, 0x77, 0x00);
/* Host FSB CKG Control */
pci_write_config8(dev, 0x78, 0x0a);
c7_pci_write_config8(dev, 0x78, 0x0a);
/* Address/Address Clock Output Delay Control */
pci_write_config8(dev, 0x79, 0xaa);
c7_pci_write_config8(dev, 0x79, 0xaa);
/* Address Strobe Input Delay Control */
pci_write_config8(dev, 0x7a, 0x24);
c7_pci_write_config8(dev, 0x7a, 0x24);
/* Address CKG Rising/Falling Time Control */
pci_write_config8(dev, 0x7b, 0xaa);
c7_pci_write_config8(dev, 0x7b, 0xaa);
/* Address CKG Clock Rising/Falling Time Control */
pci_write_config8(dev, 0x7c, 0x00);
c7_pci_write_config8(dev, 0x7c, 0x00);
/* Undefined (can't remember why I did this) */
pci_write_config8(dev, 0x7d, 0x6d);
pci_write_config8(dev, 0x7e, 0x00);
pci_write_config8(dev, 0x7f, 0x00);
pci_write_config8(dev, 0x80, 0x1b);
pci_write_config8(dev, 0x81, 0x0a);
pci_write_config8(dev, 0x82, 0x0a);
pci_write_config8(dev, 0x83, 0x0a);
c7_pci_write_config8(dev, 0x7d, 0x6d);
c7_pci_write_config8(dev, 0x7e, 0x00);
c7_pci_write_config8(dev, 0x7f, 0x00);
c7_pci_write_config8(dev, 0x80, 0x1b);
c7_pci_write_config8(dev, 0x81, 0x0a);
c7_pci_write_config8(dev, 0x82, 0x0a);
c7_pci_write_config8(dev, 0x83, 0x0a);
}
/**