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Modified Sector Erase for AT91SAM4S 

In FLASHD_ErasePages AT91C_EFC_FCMD_EPA is used to erase sectors.
According to the datasheet FARG[15:2] defines the page from which
the erase will start.This page must be modulo 4, 8, 16 or 32
according to the number of pages to erase. FARG[1:0] defines the
number of pages to be erased. Previously (firstpage << 2) was used
to conform to this, seems it should not be shifted... Changed it
to (firstPage) | erasePages.

Change-Id: I791cc7fc4faf056623ad5a6c7e860315306098a1
Signed-off-by: Olivier Schonken <olivier.schonken@gmail.com>
Reviewed-on: http://openocd.zylin.com/830
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
This commit is contained in:
Olivier Schonken 2012-09-12 21:56:50 +02:00 committed by Spencer Oliver
parent bd5f5c6a66
commit 5952843fc5
1 changed files with 8 additions and 1 deletions
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9
src/flash/nor/at91sam4.c
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@ -722,10 +722,17 @@ static int FLASHD_ErasePages(struct sam4_bank_private *pPrivate,
break;
}
/* AT91C_EFC_FCMD_EPA
* According to the datasheet FARG[15:2] defines the page from which
* the erase will start.This page must be modulo 4, 8, 16 or 32
* according to the number of pages to erase. FARG[1:0] defines the
* number of pages to be erased. Previously (firstpage << 2) was used
* to conform to this, seems it should not be shifted...
*/
return EFC_PerformCommand(pPrivate,
/* send Erase Page */
AT91C_EFC_FCMD_EPA,
(firstPage << 2) | erasePages,
(firstPage) | erasePages,
status);
}