From: David Woodhouse <dwmw2@infradead.org>
To: Brett Carswell <BrettC@nulec.com.au>
Cc: "'mtd@infradead.org'" <mtd@infradead.org>
Subject: Re: CFI with 4 x8/x16 devices on a 32-bit bus
Date: Tue, 10 Apr 2001 02:53:25 +0100 [thread overview]
Message-ID: <9836.986867605@redhat.com> (raw)
In-Reply-To: <1072F1A27E99D3119747005004B9A380EB98B0@MAIL>
BrettC@nulec.com.au said:
> My take on the datasheet is that when in byte mode, A-1 becomes the
> LSB of the address.
OK,... looking at the (AM29LV320D) datasheet again, I see that.
> The unlock 2 address in word mode is 0x2AA (8 bits set to 1) and byte mode
> is 0x555 (9 bits set to 1).
Ah, yes - I see that too. I find it very concerning that the datasheet is
clearer to me at 2:30 in the morning than at any other time.
OK.... how about fixing it up in the probe code to appear as an 8-bit
device, and setting the unlock[12] addresses accordingly?
If we detect it's a 16-bit device in 8-bit mode, do...
cfi->device_type = 1;
cfi->addr_unlock1 = 0xaaa;
cfi->addr_unlock2 = 0x555;
Does that work?
--
dwmw2
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next prev parent reply other threads:[~2001-04-10 1:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-09 23:34 CFI with 4 x8/x16 devices on a 32-bit bus Brett Carswell
2001-04-10 0:27 ` Nicolas Pitre
2001-04-10 1:55 ` David Woodhouse
2001-04-10 1:53 ` David Woodhouse [this message]
2001-04-10 2:01 ` David Woodhouse
-- strict thread matches above, loose matches on Subject: below --
2001-04-17 14:59 Joakim Tjernlund
2001-04-17 15:23 ` David Woodhouse
2001-04-17 15:51 ` Joakim Tjernlund
2001-04-17 15:53 ` David Woodhouse
2001-04-17 16:26 ` Joakim Tjernlund
2001-04-14 16:54 Kári Davíðsson
2001-04-12 12:41 Kári Davíðsson
2001-04-12 13:52 ` Joakim Tjernlund
2001-04-17 13:57 ` David Woodhouse
2001-04-11 15:05 Joakim Tjernlund
2001-04-10 7:30 Brett Carswell
2001-04-17 14:13 ` David Woodhouse
2001-04-05 22:58 Brett Carswell
2001-04-06 13:45 ` David Woodhouse
2001-04-06 14:12 ` David Woodhouse
2001-04-09 16:24 ` Joakim Tjernlund
2001-04-05 7:32 Brett Carswell
2001-04-05 14:09 ` David Woodhouse
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