From: "Bartłomiej Ochman" <fback@home.fback.net>
To: linux-mtd@lists.infradead.org
Subject: Patch to support (some?) flash chips from Samsung.
Date: Mon, 23 Oct 2006 21:48:07 +0200 [thread overview]
Message-ID: <20061023194806.GA32351@red.fback.net> (raw)
Hello,
following patch brings back support to (some?) flash chips from Samsung.
This applies cleanly against linux-2.6.17, for 2.6.18 requires only
trivial change.
The bad news is, that mtd doesn't work for these chips. It was working
with 2.4.30, under 2.4.32 it doesn't anymore. I try to investigate why,
maybe that is because -Os switch with gcc-3.4.x. What's interesting,
programming single bytes (words?) seems to work perfectly, changes to
a filesystem on a flash are valid -- files have proper contents, there
are no problems with filesystem consistency, etc). I hope tomorrow I will
have JTAG cable to see what went wrong with programming with mtd util.
Regards,
BO
--- cfi_cmdset_0002.c 2006-10-23 21:14:11.618024794 +0200
+++ cfi_cmdset_0002.c.new 2006-10-23 21:01:22.970876922 +0200
@@ -49,6 +49,7 @@
#define MANUFACTURER_SST 0x00BF
#define SST49LF004B 0x0060
#define SST49LF008A 0x005a
+#define MANUFACTURER_SAMSUNG 0x00ec
static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
@@ -253,7 +254,21 @@
return NULL;
}
- if (extp->MajorVersion != '1' ||
+ if (cfi->mfr == MANUFACTURER_SAMSUNG) {
+ printk(KERN_NOTICE " Samsung flash chip detected, should "
+ "be compatibile with Amd/Fujitsu.\n");
+ /* according to the specs, version should always be 3.3 */
+ if (extp->MajorVersion != '3' ||
+ extp->MinorVersion != '3') {
+ printk(KERN_ERR " Unknown Samsung Extended Query "
+ "version %c.%c.\n", extp->MajorVersion,
+ extp->MinorVersion);
+ kfree(extp);
+ kfree(mtd);
+ return NULL;
+ }
+ } /* this added support to (some?) Samsung flashes */
+ else if (extp->MajorVersion != '1' ||
(extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query "
"version %c.%c.\n", extp->MajorVersion,
reply other threads:[~2006-10-23 19:48 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20061023194806.GA32351@red.fback.net \
--to=fback@home.fback.net \
--cc=linux-mtd@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox