On Thursday 24 January 2008, Wolfgang Denk wrote: > In message <[EMAIL PROTECTED]> you wrote: > > > I think you are doing something wrong when you try to use "eeprom" to > > > access "SPI flash" - these are differnt entities... > > > > let's make sure we're talking about the same thing. SPI flashes are > > eeproms that have a SPI interface. so Spansion's S25FLxxxx, ST's > > m25pxtmels AT45DBxxxx, Winbond's W25Xxx/W25Pxx, and such. they need to > > be erased before writing, are split up into some unit size, etc... all > > SPI flashes nowadays conform to the JEDEC standard (JEP106) which allows > > for querying of manufacturer/device ids so that they can be dynamically > > detected. sounds to me like "eeprom" is the correct interface for > > utilizing these devices. > > Sounds to me as if you were talking about flash devices with a SPI bus > interface. > > The original SPI eeprom support was implemented som 7+ years ago for > the Siemens CCM board; this is where the "CONFIG_SPI" stuff in > common/cmd_eeprom.c comes from, and this was supported by the > cpu/mpc8xx/spi.c SPI driver. Note that this was a real EEPROM device, > i. e. we just needed spi_read() and spi_write() functions to access > it. No erase, no sectors or any such stuff. > > That was an EEPROM - what you have looks like a flash device to me.
OK, thanks for the explanation. this is much before my time ;). at the moment, the Blackfin SPI flash driver hides all of the erasing/writing stuff for the user so that it integrates easily into the eeprom command. i'm going to guess that you dont like the sound of that at all ;). -mike
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