As the subject line states, here is the output of 'flashrom -VV -p ch341a_spi':
flashrom v1.1 on Linux 5.0.0-37-generic (x86_64) flashrom is free software, get the source code at https://flashrom.org
flashrom was built with libpci 3.5.2, GCC 7.4.0, little endian Command line (3 args): flashrom -VV -p ch341a_spi Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). Initializing ch341a_spi programmer Device revision is 3.0.4 The following protocols are supported: SPI. Probing for AMIC A25L05PT, 64 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017
....
SFDP number of parameter headers is 2 (NPH = 1).
SFDP parameter table header 0/1: ID 0x00, version 1.0 Length 36 B, Parameter Table Pointer 0x000030 Parsing JEDEC flash parameter table... 3-Byte only addressing. Status register is non-volatile and the standard does not allow vendors to tell us whether EWSR/WREN is needed for status register writes - assuming EWSR. Write chunk size is at least 64 B. Flash chip size is 8192 kB. Block eraser 0: 2048 x 4096 B with opcode 0x20 Tried to add a duplicate block eraser: 2048 x 4096 B with opcode 0x20. Block eraser 1: 256 x 32768 B with opcode 0x52 Block eraser 2: 128 x 65536 B with opcode 0xd8 done.
SFDP parameter table header 1/1: ID 0x20, version 1.0 Length 16 B, Parameter Table Pointer 0x000060 === SFDP has autodetected a flash chip which is not natively supported by flashrom yet. All standard operations (read, verify, erase and write) should work, but to support all possible features we need to add them manually. You can help us by mailing us the output of the following command to flashrom@flashrom.org: 'flashrom -VV [plus the -p/--programmer parameter]' Thanks for your help! === Found Unknown flash chip "SFDP-capable chip" (8192 kB, SPI) on ch341a_spi. Probing for AMIC unknown AMIC SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Atmel unknown Atmel SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Eon unknown Eon SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Macronix unknown Macronix SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for PMC unknown PMC SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for SST unknown SST SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for ST unknown ST SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Sanyo unknown Sanyo SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Winbond unknown Winbond (ex Nexcom) SPI chip, 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Generic unknown SPI chip (RDID), 0 kB: probe_spi_rdid_generic: id1 0x20, id2 0x7017 Probing for Generic unknown SPI chip (REMS), 0 kB: probe_spi_rems: id1 0x20, id2 0x16 Found Unknown flash chip "SFDP-capable chip" (8192 kB, SPI). No operations were specified.
Maybe I am mistaken, but I have not seen the actual partnumber of the chip in the mail. Do you have opportunity to test read/write/earse functions?
Br,
Miklos
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Márton Miklós