• Bartlomiej Zolnierkiewicz's avatar
    ide: add ide_use_fast_pio() helper (v3) · 7569e8dc
    Bartlomiej Zolnierkiewicz authored
    * add ide_use_fast_pio() helper for use by host drivers
    * add DMA capability and hwif->autodma checks to ide_use_dma()
      - au1xxx-ide/it8213/it821x drivers didn't check for (id->capability & 1)
        [ for the IT8211/2 in SMART mode this check shouldn't be made but since
          in it821x_fixups() we set DMA bit explicitly:
                   if(strstr(id->model, "Integrated Technology Express")) {
                           /* In raid mode the ident block is slightly buggy
                              We need to set the bits so that the IDE layer knows
                              LBA28. LBA48 and DMA ar valid */
                           id->capability |= 3;            /* LBA28, DMA */
           we are better off using generic helper if we can ]
      - ide-cris driver didn't set ->autodma
        [ before the patch hwif->autodma was only checked in the chipset specific
          hwif->ide_dma_check implementations, for ide-cris it is cris_dma_check()
          function so there no behavior change here ]
    * updated patch description (thanks to Alan Cox for the feedback)
    * updated for scc_pata driver
    Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>