On Tue, Jan 29, 2013 at 10:58:02AM +0100, Jan Luebbe wrote: > The kernel uses these bytes to differentiate between erased/programmed > pages. > > Signed-off-by: Jan Luebbe <[email protected]> > --- > drivers/mtd/nand/nand_omap_gpmc.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/drivers/mtd/nand/nand_omap_gpmc.c > b/drivers/mtd/nand/nand_omap_gpmc.c > index 9050a8d..b81ad53 100644 > --- a/drivers/mtd/nand/nand_omap_gpmc.c > +++ b/drivers/mtd/nand/nand_omap_gpmc.c > @@ -751,6 +751,35 @@ static int omap_gpmc_read_page_bch_rom_mode(struct > mtd_info *mtd, > return 0; > } > > +static void omap_gpmc_write_page_bch_rom_mode(struct mtd_info *mtd, struct > nand_chip *chip, > + const uint8_t *buf) > +{ > + int i, eccsize = chip->ecc.size; > + int eccbytes = chip->ecc.bytes; > + int eccsteps = chip->ecc.steps; > + uint8_t *ecc_calc = chip->buffers->ecccalc; > + const uint8_t *p = buf; > + uint32_t *eccpos = chip->ecc.layout->eccpos; > + > + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { > + chip->ecc.hwctl(mtd, NAND_ECC_WRITE); > + chip->write_buf(mtd, p, eccsize); > + chip->ecc.calculate(mtd, p, &ecc_calc[i]); > + } > + > + for (i = 0; i < chip->ecc.total; i++) > + chip->oob_poi[eccpos[i]] = ecc_calc[i]; > + > + /* > + * set padding byte for each subpage to 0x00, so the kernel > + * can detect erased pages > + */ > + for (i = 0; i < 4; i++) { > + chip->oob_poi[1+14*(i+1)] = 0x00; > + } > + > + chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); > +} > static int omap_gpmc_eccmode(struct gpmc_nand_info *oinfo, > enum gpmc_ecc_mode mode) > {
Nit: Missing blank line. Sascha > @@ -823,6 +852,7 @@ static int omap_gpmc_eccmode(struct gpmc_nand_info *oinfo, > oinfo->nand.ecc.bytes = 4 * 13; > oinfo->nand.ecc.size = 4 * 512; > nand->ecc.read_page = omap_gpmc_read_page_bch_rom_mode; > + nand->ecc.write_page = omap_gpmc_write_page_bch_rom_mode; > omap_oobinfo.oobfree->length = 0; > j = 0; > for (i = 2; i < 15; i++) > -- > 1.7.10.4 > > > _______________________________________________ > barebox mailing list > [email protected] > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
