On Thursday, December 24, 2015 at 04:08:33 AM, Thomas Chou wrote: > Hi Marek, > > On 2015年12月24日 11:01, Marek Vasut wrote: > > On Thursday, December 24, 2015 at 03:23:05 AM, Thomas Chou wrote: > >> Hi Marek, > >> > >> On 2015年12月24日 09:28, Marek Vasut wrote: > >>> On Thursday, December 24, 2015 at 01:51:22 AM, Thomas Chou wrote: > >>>> Skip erase if the sector is blank. The sector erase is slow, and > >>>> may take 0.7 sec typically or up to 3 sec worst-case. > >>>> > >>>> Signed-off-by: Thomas Chou <tho...@wytron.com.tw> > >>>> --- > >>>> > >>>> drivers/mtd/altera_qspi.c | 39 > >>>> +++++++++++++++++++++++++-------------- 1 file changed, 25 > >>>> insertions(+), 14 deletions(-) > >>>> > >>>> diff --git a/drivers/mtd/altera_qspi.c b/drivers/mtd/altera_qspi.c > >>>> index b0d4f2c..8a630a6 100644 > >>>> --- a/drivers/mtd/altera_qspi.c > >>>> +++ b/drivers/mtd/altera_qspi.c > >>>> @@ -131,24 +131,35 @@ static int altera_qspi_erase(struct mtd_info > >>>> *mtd, struct erase_info *instr) size_t end = addr + len; > >>>> > >>>> u32 sect; > >>>> u32 stat; > >>>> > >>>> + u32 *flash, *last; > >>>> > >>>> instr->state = MTD_ERASING; > >>>> addr &= ~(mtd->erasesize - 1); /* get lower aligned address */ > >>>> while (addr < end) { > >>>> > >>>> - sect = addr / mtd->erasesize; > >>>> - sect <<= 8; > >>>> - sect |= QUADSPI_MEM_OP_SECTOR_ERASE; > >>>> - debug("erase %08x\n", sect); > >>>> - writel(sect, ®s->mem_op); > >>>> - stat = readl(®s->isr); > >>>> - if (stat & QUADSPI_ISR_ILLEGAL_ERASE) { > >>>> - /* erase failed, sector might be protected */ > >>>> - debug("erase %08x fail %x\n", sect, stat); > >>>> - writel(stat, ®s->isr); /* clear isr */ > >>>> - instr->fail_addr = addr; > >>>> - instr->state = MTD_ERASE_FAILED; > >>>> - mtd_erase_callback(instr); > >>>> - return -EIO; > >>>> + flash = pdata->base + addr; > >>>> + last = pdata->base + addr + mtd->erasesize; > >>>> + /* skip erase if sector is blank */ > >>>> + while (flash < last) { > >>>> + if (readl(flash) != 0xffffffff) > >>>> + break; > >>>> + flash++; > >>> > >>> Shouldn't $last be divided by 4 ? $flash is u32 * afterall . > >> > >> No. Both flash and last are assigned with byte addressing from > >> pdata->base, which is void *. > > > > The data type of both $flash and $last is u32 * though? > > Yes. > > flash = pdata->base + addr; > > will be the same as, > > flash = pdata->base; > flash += addr / 4;
Please ignore what I said, sorry. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot