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Altera_Forum
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20 years ago

Intel Strataflash P30 and jffs2 problem

Hi Does anyone here have any experience using Intel Strataflash P30 with Nios II? We often get the following error when writing to a mounted jffs2 file system: Node totlen on flash (0x00...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

I found the answer myself in this mailing list:

mtd/intel p30 flash problem on pxa255 (http://marc.theaimsgroup.com/?l=linux-arm-kernel&m=114833865503774&w=2)

The problem was that there is a bug in some Intel P30 256Mbit engineering sample chips with id 0x8922.

Here is a patch that fixes the problem: 

--- ../../../../linux-2.6.16.27-nios/drivers/mtd/chips/cfi_cmdset_0001.c        2006-07-17 15:58:58.000000000 +0200
+++ cfi_cmdset_0001.c   2006-08-28 12:05:38.000000000 +0200
@@ -181,6 +181,17 @@
 }
# endif
+static void fixup_intel_p30(struct mtd_info *mtd, void* param)
+{
+       struct map_info *map = mtd->priv;
+       struct cfi_private *cfi = map->fldrv_priv;
+       struct cfi_pri_intelext *extp = cfi->cmdset_priv;
+
+       printk(KERN_WARNING "cfi_cmdset_0001: Erasing "
+                           "Bit 512 of Feature Set on this P30.\n");
+       extp->FeatureSupport &= ~512;
+}
+
 static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param)
 {
        struct map_info *map = mtd->priv;
@@ -232,6 +243,7 @@
# endif
        { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL },
        { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL },
+       { CFI_MFR_ANY, 0x8922, /* 28F256P30 */ fixup_intel_p30, NULL },
        { 0, 0, NULL, NULL }
 };

Hein