Hi, On Sun, Aug 30, 2015 at 6:10 PM, Guillaume Maugein <[email protected]> wrote: > Hey, > > First of all, thank you for the great work. > > I am trying to access the Micron N25Q064A13 flash chip on my Synology NAS > DS413j. > > I happen to have a teensy board available at hand, so I programmed it with > serprog software, using the instructions to which the flashrom website > points to. > I am under Xubuntu 15.04, and I installed flashrom from the daily builds > ppa. > If I remember, the version was 20150705~ubuntu14.04.1. >> >> xubuntu@xubuntu:~$ flashrom -R >> flashrom v0.9.8-unknown on Linux 3.19.0-25-generic (x86_64) > > > > I connected the programmer with GND, MISO, MOSI, CLK and CS using grips. As > I am ISP, I did not connect the VCC. > > I double-checked my connections, and they seem to be fine. > > I start the NAS, and using serial terminal (on a different computer), I stop > the boot sequence at uboot prompt. > If I flinfo in the uboot, I get the following info : > >> Marvell>> flinfo >> >> Bank#1: >> Flash Base Address : 0xf8000000 >> Flash Model : ST N25Q064 >> Manufacturer ID : 0x20 >> Device Id : 0xba17 >> Sector Size : 64K >> Number of sectors : 128 >> Page Size : 256 >> Write Protection : All > > > While the system is waiting on the prompt, I launch a flashrom command, and > the chip is not recognized : >> >> xubuntu@xubuntu:~$ sudo flashrom -V -p serprog:dev=/dev/ttyACM0:2000000 >> flashrom v0.9.8-unknown on Linux 3.19.0-25-generic (x86_64) >> flashrom is free software, get the source code at http://www.flashrom.org >> >> flashrom was built with libpci 3.2.1, GCC 4.8.4, little endian >> Command line (3 args): flashrom -V -p serprog:dev=/dev/ttyACM0:2000000 >> Calibrating delay loop... OS timer resolution is 1 usecs, 1104M loops per >> second, 10 myus = 10 us, 100 myus = 100 us, 1000 myus = 999 us, 10000 myus = >> 9998 us, 4 myus = 4 us, OK. >> Initializing serprog programmer >> Baud rate is 2000000 now. >> serprog: connected - attempting to synchronize >> . >> serprog: Synchronized >> serprog: Interface version ok. >> serprog: Bus support: parallel=off, LPC=off, FWH=off, SPI=on >> serprog: Maximum write-n length is 2037 >> serprog: Maximum read-n length is 400384 >> serprog: Programmer name is "Teensy LPC+SPI" >> serprog: Serial buffer size is 2044 >> serprog: operation buffer size is 2048 >> serprog: Output drivers enabled >> The following protocols are supported: SPI. >> Probing for {... the list is long ...} >> >> Probing for Micron/Numonyx/ST N25Q064..1E, 8192 kB: RDID byte 0 parity >> violation. probe_spi_rdid_generic: id1 0x00, id2 0x00 >> Probing for Micron/Numonyx/ST N25Q064..3E, 8192 kB: RDID byte 0 parity >> violation. probe_spi_rdid_generic: id1 0x00, id2 0x00 This (0x00 reply) means that there's something wrong with the connections/communications. My guess is either a wiring problem or the NAS is also driving the SPI I/O lines and the Teensy is not strong enough to override (it could also be harmful to the chipset if it was).
Maybe try finding a reset line and holding the NAS in reset while doing the programming. Also note that I havent tested the teensy in any ISP application, so you're doing something untested. Have fun :) -- Urja Rannikko _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
