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Dobrica Pavlinušić's random unstructured stuff
DSM-G600
Collection of some hints about Debian installation on my D-Link DSM-G600:
Resources
firmware (kernel+busybox)
It will fix various problems, including, but not limited to, problems with web interface in firefox.
http://download.dsmg600.info/people/sala/fwimage-04-sala-20070128
I tried to build firmware from source, but had various problems with building gcc. Thet are mostly related to gdb, but after a few random patches it passed compilation (but is broken, because I just commented offending lines).
usbfs
I also want usbfs which generate compilation errors because of missing files in include/linux/usbdevice_fs.h
Based on instructions on wiki and post on forum
cd /mnt/HD_a2
export DEBOOTSTRAP_DIR=`pwd`/usr/lib/debootstrap
export PATH=$PATH:/mnt/HD_a2/bin:/mnt/HD_a2/sbin
./usr/sbin/debootstrap --arch powerpc etch /mnt/HD_a2/debian http://ftp.de.debian.org/debian
cp /etc/resolv.conf /mnt/HD_a2/debian/etc/resolv.conf
# prepare chroot jail
mount -t proc proc /mnt/HD_a2/debian/proc
cd /mnt/HD_a2/
./chroot /mnt/HD_a2/debian /bin/bash
# install additional packages
apt-get update
apt-get install locales
dpkg-reconfigure locales
passwd root
apt-get install dropbear hotplug
USB printer
Kernel module for USB printers for 2.4.21-pre4 kernel: printer.o
After installation of cupsys and foomatic all went smoothly, USB printer (Samsung ML-2510) was found and configured automatically. There are a few more details in this forum thread.
Kernel 2.4
As a try to understand this ppc board, I tried to port changes from MontaVista (D-Link used that tree) to current upstream 2.4 kernel and got to the point where SCSI controller times out when reading partition table. This means that board does init, it has serial port which works and has some idea about PCI space (which seems somewhat fishy if you ask me). linux-2.4.34.4-dsmg600.diff.gz
Few more details are available in this forum post.
Kernel 2.6
I have a creazy idea: this device should run 2.6! So, here is my work in progress...
According to patches for kurobox which is quite similar to our hardware, there isn't any changes in current upstream version execept for missing drivers. For DSM G600 that boils town to IP1000 network driver, which still isn't in mainland, but seems to be referenced on LKLM as possible inclusion.
Expirince with 2.4 kernel shows that I have to do more porting to make 2.6 port usable. As a start, code for board initialization is specific for DSM-G600 as well as serial port driver. When we have those two things working we can see if loader.o could boot our kernel. I think that shouldn't be problem, because loader.o origin shows that it's possible to boot 2.6 kernel from 2.4 kernel using loader.o module.
New round based on powerpc kernels
After review of current upstream kernel (2.6.22) and state of powerpc kernel.org repository I decided to base my efforts on this branch.
For now here are few useful links:
Compilation notes
Compile kernel and convert it to binary format for loader.o:
. env.sh
make
powerpc-linux-objcopy -O binary vmlinux
scp vmlinux disk:/tmp/
Then try out your kernel on DSM:
cd /mnt/HD_a2 && sync && insmod /mnt/HD_a2/loader.o kernel=/mnt/HD_a2/debian/tmp/vmlinux
Please note that you must use full path to kernel binary. Also note that all paths are customized for my particular device (to help with copy/paste :-)
Emulation
It's useful to have development environment for DSM on another machine, so I tried to use QEMU to do so.
This didn't work quite well as described first in this blog post.
My efforts right now are into making GXemul emulate enough of DSM-G600 to boot original D-Link kernel.
Source code
All source code is now available in git repository
Board specification
Here is information that I collected while working on 2.4 port in hope that it will assist me in porting 2.6 kernel
Memory map
Part of information extracted from u-boot loader, part from kernel source
from to size
00000000 02000000 02000000 SDRAM 32Mb
80000000 f0000000 70000000 pci mem space?
fc000000 fcc00000 00c00000 EUMB (PCI I/O space)
fcc00000 fcf00000 00300000 pci cfg regs
fcf00000 fd000000 00100000 pci iack
fe000000 febfffff 00c00000 PCI host bridge
ffc00000 ffffffff 00400000 Flash 4Mb
Important addresses:
10000000 CFG_MAX_RAM_SIZE, CFG_BANK0_END (u-boot)
40000000 CFG_INIT_RAM_ADDR (u-boot)
c0000000 start of kernel 2.4.21-pre4 VM
80000000 --- PCI memory space ---
bfffd000 PCI 1033:0035 Non-prefetchable memory
bfffe000 PCI 1814:0201 Non-prefetchable memory
c3029f00 PCI 1033:00e0 00:0e.2 irq 2 ciehci_hcd
c3032000 PCI 1033:0035 00:0e.0 irq 1 usb-ohci
c3034000 PCI 1033:0035 00:0e.1 irq -1 usb-ohci disabled
c30ab000 PCI 1814:0201 irq 0 wirel, /sys/cra0
f0000000 --- PCI memory space ---
fc000000 --- EUMB ---
fc040000 OpenPIC_Addr (mpc1)
fc004500 ttyS0
fc004600 ttyS1
fd000000 --- EUMB ---
febffe00-febffe7f : PCI device 1191:0008
febffe00-febffe0f : atp86x
febffee4-febffee7 : PCI device 1191:0008
febffee8-febffeef : PCI device 1191:0008
febffee8-febffeef : atp86x
febffef4-febffef7 : PCI device 1191:0008
febffef8-febffeff : PCI device 1191:0008
febffef8-febffeff : atp86x IDE, irq 4
febfff00-febfffff : PCI device 13f0:1023
febfff00-febffffe : Sundance Technology IPG Triple-Speed Ethernet
ff000000 ROM_CS1_START (on soc?), FLASH_BASE1_PRELIM (u-boot)
ff800000 ROM_CS0_START
ffc00000 FLASH_BASE0_PRELIM (u-boot)
ffc20000 ramdisk load address
fff00000 TEXT_BASE (u-boot)
fff00100 CFG_RESET_ADDRESS
fff10000 boot image load address
Important constants:
CFG_NS16550_CLK 100000000
CONFIG_SYS_CLK_FREQ 100000000
MTD
Addresses are relative to start of mtd at 0xffc00000
0x00000000-0x00010000 : "Linux mtd1"
0x00010000-0x00020000 : "Linux mtd2"
0x00020000-0x00300000 : "Linux Ramdisk"
0x00300000-0x00310000 : "U-BOOT BOOT LOADER"
0x00310000-0x00400000 : "Linux Kernel"
Kernel configuration options
From old 2.4 kernel, just something to keep eye on while configuring 2.6 kernels...
- CONFIG_6xx
- CONFIG_SANDPOINT
- CONFIG_PPC_ISATIMER
- CONFIG_MTD_PARTITIONS
- CONFIG_MTD_CHAR
- CONFIG_MTD_BLOCK
- CONFIG_MTD_CFI
- CONFIG_MTD_GEN_PROBE
- CONFIG_MTD_CFI_AMDSTD
IRQ
sandpoint_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{ 0, 0, 0, 0 }, /* IDSEL 13 - mini-PCI */
{ 1, -1, 2, 0 }, /* IDSEL 14 - NEC USB2.0 */
{ 3, 0, 0, 0 }, /* IDSEL 15 - ADM983 */
{ 4, 0, 0, 0 }
};
const long min_idsel = 13, max_idsel = 16, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static u_char sandpoint_openpic_initsenses[] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 17, EPIC IRQ 1 - PCI1 - flash*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 18, EPIC IRQ 2 - LAN*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 19, EPIC IRQ 3 - Not used*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 20, EPIC IRQ 4 - Not used*/
1
}
sandpoint_init_IRQ(void)
/* Map EPIC IRQs 0-3 */
openpic_set_sources(0, 5, OpenPIC_Addr + 0x10200);
/* Skip reserved space and map i2c and DMA Ch[01] */
openpic_set_sources(113, 3, OpenPIC_Addr + 0x11020);
/* Skip reserved space and map Message Unit Interrupt (I2O) */
openpic_set_sources(118, 1, OpenPIC_Addr + 0x110C0);
//REX: UART
openpic_set_sources(121, 1, OpenPIC_Addr + 0x11120); //ttyS0
openpic_set_sources(122, 1, OpenPIC_Addr + 0x11140); //ttyS1 jackl
mpc10x
mpc10x_bridge_init(hose,
MPC10X_MEM_MAP_B,
MPC10X_MEM_MAP_B, MPC10X_MAPB_EUMB_BASE)
should be changed to:
mpc10x_bridge_init(hose,
MPC10X_MEM_MAP_B,
MPC10X_MEM_MAP_B,
0xfc000000) == 0)
IO block
consistent with following:
- io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
+ io_block_mapping(0xfc000000, 0xfc000000, 0x04000000, _PAGE_IO);
Serial
#define UART0_INT 121
#define UART1_INT 122
#define SANDPOINT_SERIAL_0 0xFC004500
#define SANDPOINT_SERIAL_1 0xFC004600
CPU
#define CPU_200 1
#define BASE_BAUD (100000000/16)
Led control strings
Taken from Beattie's page about DSM-G600
String Function
SYN Power led flash, HDD, HDD-Full, USB, WLAN leds off
ZWC Turn Power Off
ZWO Power led solid
ZBO Power led flash
WLO WLAN led green
WLC WLAN led off
WBO WLAN led flash green then off
HDE HDD led yellow solid
HDC HDD-Full led off
HBO HDD-Full led flash yellow
HDN HDD led off
MMK USB led green
MMF USB led yellow
MMC USB led off
MMI USB led blink green
MUI USB led blink yellow
MMN USB led off
AKO Unknown
TSO Power, HDD, USB, WLAN leds green, HDD-Full yellow
TSR Power, HDD-Full, WLAN leds off, HDD, USB leds yellow
TSC Power, HDD, HDD-Full, USB, WLAN leds off
Chassis Status Strings
String Bit Function
RKO 0x0001
UKO 0x0002
CKO 0x0004
EKO 0x0008
PKO 0x0100
1KO 0x0200
TS1 0x0010
TS2 0x0020
RKR 0x0040
UKR 0x0080
IOK 0x1000
LOK 0x2000
NOK 0x4000
AKI 0x8000
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