Editing Syscon Hardware

<div style="float:right">[[File:SYSCON_GEN1.JPG|thumb|Syscon 1st Generation (BGA Packaging)]]<br />[[File:Pyramid Syscon live probing.jpg|thumb|Pyramid Syscon live probing]]</div>

Syscon is the main power controller chip. It is responsible for powering up the various power systems and for configuring and initialising the [[CELL BE]], [[RSX]] and [[South Bridge]]. It communicates with these devices via seperate SPI busses. There is external access by JTAG (disabled from factory on retail models), an EEPROM programming interface <!-- not fully examined --> and Serial (UART). The Syscon is a SoC and consists of an ARM7TDMI (ARMv4) CPU, a 256KB EEPROM and 16KB RAM.

= Serialnumbers @ SKU =

== Retail ==
{| class="wikitable sortable"
|-
! [[SKU Models|Model]] !! [[IDPS|Type]] !! [[Motherboard Revisions|Board]] !! [[Syscon Hardware|Syscon<br />part no.]] !! Syscon<br />[[More System Information#First_section|Soft ID]] !! Notes
|-
| [[CECHAxx]]<br />[[CECHBxx]] || 0x01<br />0x02 || [[COK-00x#COK-001|COK-001]] || [[CXR713120-201GB]] || 0B8E || 
|-
| [[CECHCxx]]<br />[[CECHExx]] || 0x03<br />0x04 || [[COK-00x#COK-002|COK-002]] or<br />[[COK-00x#COK-002W|COK-002W]] || [[CXR713120-201GB]] or<br />[[CXR713120-202GB]] || 0C16 || 
|-
| [[CECHGxx]] || 0x05 || [[SEM-00x|SEM-001]] || [[CXR713120-201GB]] or<br />[[CXR713120-202GB]] or<br />[[CXR713120-203GB]] || 0D52 ||
|-
| [[CECHHxx]] || 0x06 || [[DIA-00x#DIA-001|DIA-001]] || [[CXR714120-301GB]] || 0DBF ||
|-
| [[CECHJxx]]<br />[[CECHKxx]] || 0x07 || [[DIA-00x#DIA-002|DIA-002]] || [[CXR714120-301GB]] or<br />[[CXR714120-302GB]] || 0E69 || 
|-
| [[CECHLxx]]<br />[[CECHMxx]]<br />[[CECHPxx]]<br />[[CECHQxx]] || 0x08 || [[VER-00x|VER-001]] || [[SW-301]] or<br />[[SW-302]] || 065D ||
|-
| [[CECH-20xx]] || 0x09 || [[DYN-00x|DYN-001]] || [[SW2-301]] || 0832 || 
|-
| [[CECH-21xx]] || 0x0A || [[SUR-00x|SUR-001]] || [[SW2-301]] or<br />[[SW2-302]] || 08A0 || 
|-
| [[CECH-25xx]] || 0x0B || [[JTP-00x|JTP-001]] or<br />[[JSD-00x|JSD-001]] || [[SW2-301]] or<br />[[SW2-302]]&nbsp;&nbsp;or<br />[[SW2-303]] || 08C2 || 
|-
| [[CECH-30xx]] || 0x0C || [[KTE-00x|KTE-001]] || [[SW2-301]] or<br />[[SW2-302]] or<br />[[SW2-303]] || 0918 || 
|-
| [[CECH-40xx]] || 0x0D || [[MSX-00x|MSX-001]] or<br />[[MPX-00x|MPX-001]] || [[SW3-302]] || 098F || 
|-
|}

==Non retail==
{| class="wikitable sortable"
|-
! [[SKU Models|Model]] !! [[IDPS|Type]] !! [[Motherboard Revisions|Board]] !! [[Syscon Hardware|Syscon<br />part no.]] !! Syscon<br />[[More System Information#First_section|Soft ID]] !! Active JTAG !! Notes
|-
| [[CEB-2040]] || - || [[MPU-501]] || [[CXR713F120|CXR713F120GB-000]] ||  || Yes || Retail prototype
|-
| [[DECR-1000|DECR1000(A/J)]] || 0x01 || [[TMU-520]] || [[CXR713F120A]] || 03FB || ? <!-- PS3NEWS says yes, but no proof --> || Reference tool
|-
| [[DEH-H1000A(S)(-E(S))]] || 0x01 || [[COK-001 (Prototype)]] || [[CXR713F120A]] || 0B67 || ? <!-- same SC, so yes --> || Preproduction
|-
| [[DEH-H1001-D]] || 0x01 || [[COOKIE-13]] || [[CXR713F120A]] || ?0B67? || ? <!-- PS3NEWS says yes, but no proof --> || Preproduction
|-
| [[DEH-FH1500J-A]] ||  || [[VERTIGO-02]] ||  ||  ||  || Preproduction
|-
 <!-- Not Prototype debug units - see retail -->
|}
<br/>
----

Not mentioned:<pre>
0F29 - ?
0F38 - ?</pre>

= Syscon Externalised Ports =
'''Note:''' for more specific information per model, see the links to each subppage in the Serialnumbers @ SKU table.

== Syscon UART packets ==

=== SCUART daemon (SCUARTD) packet structure ===

SCUARTD packets includes header of 0x3 bytes and optional payload (depending on the command).
Packet IDs are not important, they are used only by clients and processed by SCUART daemon. SCUART daemon opens terminal file /dev/ttyS0 and use it to send commands and receive responses.

{| class="wikitable"
|-
! Offset !! Size !! Description
|-
| 0x00 || 0x01 || Magic?
|-
| 0x01 || 0x01 || Payload size
|-
| 0x02 || 0x01 || Command
|-
| 0x03 || Payload size || Payload data
|-
|}

=== Packets ===

{| class="wikitable"
! Packet ID !! Command/Action !! Description !! Notes
|-
| 0x00 || '''version''' || Firmware version || Gets installed syscon's firmware version (Note: backup bank contains version 0.4.5_b4 !! )
|-
| 0x01 || '''bringup''' || || <!--// Standby->ON (Remote Power ON using an UART package, from [[Communication Processor]] ?) //-->
|-
| 0x02 || '''shutdown''' || || <!--// ON->Standby (Remote Power OFF using an UART package, from [[Communication Processor]] ?) //-->
|-
| 0x03 || '''firmud''' || Firmware update || Notifies about firmware update operation
|-
| 0x04 || '''bsn''' || Board Serial Number || Retrieves syscon's Board Serial Number
|-
| 0x05 || '''halt''' || || Used at start of firmware update operation
|-
| 0x06 || '''cp ready''' || || <!--// [[Communication Processor]] related, for [[SKU_Models_Nonretail#Reference_Tool_.28Tool.2FDECR.29 | Tool/DECR models]]  //-->
|-
| 0x07 || '''cp busy''' || || <!--// [[Communication Processor]] related, for [[SKU_Models_Nonretail#Reference_Tool_.28Tool.2FDECR.29 | Tool/DECR models]] //-->
|-
| 0x08 || '''cp reset''' || || <!--// [[Communication Processor]] related, for [[SKU_Models_Nonretail#Reference_Tool_.28Tool.2FDECR.29 | Tool/DECR models]] //-->
|-
| 0x09 || '''bestat''' || Cell B.E. status || Retrieves Cell B.E. status
|-
| 0x0A || '''powersw''' || <!-- Power switch ? --> ||
|-
| 0x0B || '''resetsw''' || <!-- Reset switch ? --> ||
|-
| 0x0C || '''bootbeep stat''' || ||
|-
| 0x0D || '''bootbeep on''' || ||
|-
| 0x0E || '''bootbeep off''' || ||
|-
| 0x0F || ''Reset syscon'' || Reset || Resets syscon
|-
| 0x10 || '''xdrdiag info''' || XDR diagnostics ||
|-
| 0x11 || '''xdrdiag start''' || XDR diagnostics || Starts XDR diagnostics
|-
| 0x12 || '''xdrdiag result''' || XDR diagnostics || Gets a result of XDR diagnostics
|-
| 0x13 || '''xiodiag''' || XIO diagnostics || Starts XIO diagnostics and gets a result of it
|-
| 0x14 || '''fandiag''' || Fan diagnostics || Retrieves RPMs of fans
|-
| 0x15 || '''errlog''' || Error log || Retrieves a list of codes (with timestamps) of latest errors
|-
| 0x16 || ''Read line'' || ||
|-
| 0x17 || '''tmpforcp <zone ID>''' || Reference Tool's temperature || Gets the temperature of reference tool
|-
| 0x18 || rowspan="7" colspan="3" style="background:lightgrey; color:#ff0000; text-align: center;" | Invalid CMDs
|-
| 0x19
|-
| 0x1A
|-
| 0x1B
|-
| 0x1C
|-
| 0x1E
|-
| 0x1F
|-
| 0x20 || '''cp beepremote''' || ||
|-
| 0x21 || '''cp beep2kn1n3''' || ||
|-
| 0x22 || '''cp beep2kn2n3''' || ||
|-
| ?? || '''csum''' || Checksum ?? || Calculates the Checksum of something (No packet ID listing on scuartd)
|-
|}

=== Packets Logs ===

{| class="wikitable"
! Packet ID !! Command/Action !! Logs !! Notes
|-
| 0x00 || '''version''' || <pre>  version\nv1.0.4_c2\n  (END) </pre> ||
|-
| 0x01 || '''bringup''' || <pre>   (END) </pre> ||
|-
| 0x02 || '''shutdown''' || <pre> Do nothing. (PowerOff State)\n (END) </pre> || Returns [mullion]$ if the system is on 
|-
| 0x03 || '''firmud''' || <pre> Start...\nErase User Program Area\n  (END) </pre> || This will brick your SYSCON if you don't feed it any argument or feed to it the wrong argument!
|-
| 0x04 || '''bsn''' || <pre> bsn\nNANNNNNNNNNA\n  (END) </pre> || N is digit and A is char (removed for privacy)
|-
| 0x05 || '''halt''' || <pre> halt\n  (END)</pre> ||
|-
| 0x06 || '''cp ready''' || <pre> cp ready\nCP READY: OK\n  (END) </pre> || 
|-
| 0x07 || '''cp busy''' || <pre> cp ready\nCP BUSY: OK\n  (END) </pre> || STATUS light blinks forever
|-
| 0x08 || '''cp reset''' || No response || Should reset CP to factory settings
|-
| 0x09 || '''bestat''' || <pre> (PowerOff State)\n (END) </pre>||
|-
| 0x0A || '''powersw''' || <pre>  (END) </pre> ||
|-
| 0x0B || '''resetsw''' || <pre>  (END) </pre> ||
|-
| 0x0C || '''bootbeep stat''' || || 
|-
| 0x0D || '''bootbeep on''' || || 
|-
| 0x0E || '''bootbeep off''' || ||
|-
| 0x0F || '''Reset syscon''' || ||
|-
| 0x10 || '''xdrdiag info''' || ||
|-
| 0x11 || '''xdrdiag start''' || ||
|-
| 0x12 || '''xdrdiag result''' || ||
|-
| 0x13 || '''xiodiag''' || ||
|-
| 0x14 || '''fandiag''' || ||
|-
| 0x15 || '''errlog''' || ||
|-
| 0x16 || ''Read line'' || ||
|-
| 0x17 || '''tmpforcp <zone ID>''' || 
|-
| 0x20 || '''cp beepremote''' || ||
|-
| 0x21 || '''cp beep2kn1n3''' || ||
|-
| 0x22 || '''cp beep2kn2n3''' || ||
|-
| ?? || '''csum''' || Checksum ?? || ||
|-
|}

=== Notes ===

* Some commands are unavailable on earlier firmwares, for example, tmpforcp is only supported on 1.3.3+.
* Some commands are divided into several strings, the first part (if exists) describes a command group, the second part describes the actual command and other parts describes command arguments.
* Real syscon commands have an ASCII form (a bold text in the 2nd column) instead of bytes above.
* Packet with ID *0x03* notifies syscon and calls SX program (based on ZMODEM protocol) to send firmware, syscon have custom or original implementation of RX program to receive firmware. An implementation of ZMODEM protocol used by Sony: http://oss.sony.net/Products/Linux/Others/Download/DECR-1000/mips_fp_le-lrzsz-0.12.20-devtool.1.src.rpm

A start of syscon's update procedure:
* A CP development tool includes several scripts which are participated in syscon update procedure. It starts after a CP update via ''update_syscon.pl'' perl script.
* This script checks the current syscon's firmware version. If it is in mask rom then it skips an update procedure, if not it checks major/minor/release parts of both versions and if a new version is applicable then it launches ''scfirmup'' utility and pass the firmware file path as an argument.
* ''scfirmup'' is a stupid tool which prepares a connection to SCUARTD and sends an update packet with a file path inside it. There is no need to comment it, here is reimplementation: http://pastie.org/private/6h8mfeoics4mdxear7ayg

A syscon's update operation in '''SCUARTD''' consists of following steps:
* 1. Check if ''SX'' program presents in ''/usr/bin/sx''. It should be a regular file.
* 2. Check if specified firmware file is a regular file.
* 3. Halt syscon by sending command '''halt'''  to UART, then wait some time until it prints ''HALT: OK''.
* 4. Reset syscon by sending byte ''0x30'' to GPIO register '''SC_PI0_DIPSW''', byte ''0x30'' to GPIO register '''SC_RSTX''', waiting 1 second and writing byte ''0x31'' to GPIO register '''SC_RSTX'''.
* 5. Get current syscon's firmwave version by sending command '''version''' to UART. After receiving it, look for a character after the first ''_'' (underscore) symbol from the left side of string and if it equals to the character ''b'', then proceed to the next step, otherwise go to the (8) step. (It is possible to patch this step to allow upgrading or downgrading at will)
* 6. Prepare syscon for an update by sending command '''firmud''' to UART, then fork the current process; the current process won't finish until a message ''Done'' from UART arrives (it is the end of update operation).
* 7. In the forked process start ''SX'' program and pass firmware file path to it. ''SX'' program reads firmware file and transfer each chunk of it to syscon.
* 8. After successful update operation reset syscon (a different way) by sending byte ''0x31'' to GPIO register '''SC_PI0_DIPSW''', byte ''0x30'' to GPIO register '''SC_RSTX''', waiting 1 second and writing byte ''0x31'' to GPIO register '''SC_RSTX'''.

Notes:
* It seems all scuartds checks firmware revision and probably syscon is updated only once (after factory).
* To be able to reflash it you need to patch ''SCUARTD'' or do a manual update without the use of ''SCUARTD''.
* You need to patch a single byte in ''SCUARTD'' to be able to flash any firmware (for example, to downgrade your syscon).
<syntaxhighlight lang="asm">
.text:00403A94: /* scuartd from CP 1.3.3 */
lb      $v1, 1($v0)
li      $v0, "b" /* 62 00 02 24 -> 63 00 02 24 */
bne     $v1, $v0, loc_4039F4
move    $a0, $zero
</syntaxhighlight>
* An actual firmware update process (without halting and resetting steps) takes about 1 minute.
* You cannot install a corrupted firmware with scfirmup! It seems there is a hash of sorts (possibly of the plaintext) in the header preventing scfirmup from installing something corrupt
* Updating SYSCON requires the DECR to be in standby mode! You cannot update it while it is on.
* Corrupting the header and the body will make firmup install the SYSCON update anyways! be careful not to do it!
* Should you brick SYSCON, here's a patch to "unbrick" it, do not use it unless you brick it though!
<syntaxhighlight lang="asm">
.text:004038C0:
lw      $a0, 4($s4)
li      $a1, 0x400000
nop
addiu   $a1, (aHalt - 0x400000)  # "halt"
la      $t9, scuartd_send_sccmd
nop
jalr    $t9 ; scuartd_send_sccmd
nop
lw      $gp, 0x1E8+var_1D8($sp)
bnez    $v0, loc_4039B4 /* 33 00 40 14 -> 33 00 40 10 */
li      $a0, 1
</syntaxhighlight>

== Syscon UART ==
{| class="wikitable"
! BGA !! Name !! Description
|-
| P16 || UART0_TxD || Serial Transmit
|-
| P15 || UART0_RxD || Serial Receive
|-
|}

You can attach a 3.3v TTL cable (LV-TTL) to the UART on syscon (UART0_TxD, UART0_RxD). (Convenient solder points are available on JSD/JTP-001 by the NOR test points. They are marked as '?' in [[:File:JSD-001 NOR - nor testpoints.png|marcan' noraliser / judges' NORway install picture]], closest to the ground at the bottom - RX is left, TX is right) Baud rate is 57600. There is a simple plaintext protocol involved. This varies on different syscon models. Example:

'''<command>:<hash>'''

Where the hash is the sum of command bytes & 0xFF

you should terminate commands with \r\n, the syscon messages are only terminated with \n

=== Samples ===
Here are some of the commands/messages encountered:

Messages:
<pre>Power applied (standby mode)
OK 00000000:3A

Power on
# (PowerOn State):7F

Power off (Hard shutdown)
# (PowerOff State):DD

After Fan test:
# (PowerOff State) (Fatal):36

No text, invalid hash:
NG F0000002:4D</pre>

Commands:
<pre>VER:ED
OK 00000000 S1E 00 00 065D:A4

ERRLOG:CB
OK 00000000:3A

DATE:1E
NG F0000003:4E

C:F1:BUZ
E:4F:NG F0000004

C:D0:CID
E:50:NG F0000005

C:DA:EEP
E:50:NG F0000005

C:D5:FAN
E:50:NG F0000005

C:F4:KSV
E:50:NG F0000005

C:ED:REV
E:50:NG F0000005

C:F8:SPU
E:50:NG F0000005</pre>
more [[Talk:System_Controller_Firmware#Syscon_commands|Syscon commands]]

bruteforcing commands:<!--// LOL //--> http://pastebin.com/CNei0xbC<br>

VERY IMPORTANT:
* Max size of a command is 11 characters,16 if you count with C:<hash>:
* Sending a command with 11 chars results in NO OUTPUT
* Sending a command with more than 11 chars results in NG F0000002

== Syscon (SPI) EEPROM ==
{| class="wikitable"
! BGA !! Name !! Description
|-
| F16 || CSB || Chip Select (needs to be low)
|-
| H16 || DO || Serial Data Output
|-
| G16 || DI || Serial Data Input
|-
| E16 || SKB || Serial Data Clock
|-
| J15 || WCB || Write Protect
|-
| J16 || RBB || Ready/Busy
|-
| G11 || VDDep || + 3.3V
|-
| C15 || VSSep || GND
|-
|}

== Syscon JTAG ==
disabled in factory after production on retailmodels
{| class="wikitable"
! BGA !! Name !! Description
|-
| L8 || JRTCK || Return Test Clock
|-
| K8 || JTCK || Test Clock
|-
| K9 || JTDO || Test Data Out
|-
| L9 || JTMS || Test Mode State / Test Mode Select
|-
| K7 || JTDI || Test Data In
|-
| L7 || JNTRST || Test Reset
|-
|}

= Syscon Underlaying ports =
== Syscon Cell SPI Bus ==
{| class="wikitable"
! BGA !! Name !! Description
|-
| M2 || /BE_SPI_CS || Chip Select
|-
| N2 || BE_SPI_DO || Serial Data Output
|-
| M1 || BE_SPI_DI || Serial Data Input
|-
| N1 || BE_SPI_CLK || Serial Data Clock
|-
| P2 || /BE_RESET || CellBE Reset
|-
| P1 || BE_POWGOOD  || CellBE PowerGood
|-
| T2 || /BE_INT || CellBE Interrupt
|-
|}

== Syscon Southbridge SPI Bus ==
{| class="wikitable"
! BGA !! Name !! Description
|-
| B9 || /SB_SPI_CS || Chip Select
|-
| B8 || SB_SPI_DO || Serial Data Output
|-
| A9 || SB_SPI_DI || Serial Data Input
|-
| A8 || SB_SPI_CLK || Serial Data Clock
|-
|}

<!--// Remote Power ON/OFF (from network, HDMI CEC commands, etc...) is managed by devices connected to the southbridge (ethernet/wifi/BT, HDMI controller, etc...) //-->


{{Motherboard Components}}<noinclude>[[Category:Main]]</noinclude>