ide: add support for CFA specified transfer modes (take 3)

Add support for the CompactFlash specific PIO modes 5/6 and MWDMA modes 3/4.

Since there were no PIO5 capable hard drives produced and one would also need
66 MHz IDE clock to actually get the difference WRT the address setup timings
programmed, I decided to simply replace the old non-standard PIO mode 5 timings
with the CFA specified ones.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stf_xl@wp.pl
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 0e62698146b6..0caca342802d 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -306,6 +306,7 @@ int ide_driveid_update(ide_drive_t *drive)
         drive->id[ATA_ID_UDMA_MODES]  = id[ATA_ID_UDMA_MODES];
         drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
         drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
+        drive->id[ATA_ID_CFA_MODES]   = id[ATA_ID_CFA_MODES];
         /* anything more ? */
 
         kfree(id);
@@ -390,7 +391,10 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
                 id[ATA_ID_UDMA_MODES]  &= ~0xFF00;
                 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
                 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
-        }
+                if (ata_id_is_cfa(id))
+                        id[ATA_ID_CFA_MODES] &= ~0x0E00;
+        } else  if (ata_id_is_cfa(id))
+                id[ATA_ID_CFA_MODES] &= ~0x01C0;
 
  skip:
 #ifdef CONFIG_BLK_DEV_IDEDMA
@@ -403,12 +407,18 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
         if (speed >= XFER_UDMA_0) {
                 i = 1 << (speed - XFER_UDMA_0);
                 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
+        } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
+                i = speed - XFER_MW_DMA_2;
+                id[ATA_ID_CFA_MODES] |= i << 9;
         } else if (speed >= XFER_MW_DMA_0) {
                 i = 1 << (speed - XFER_MW_DMA_0);
                 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
         } else if (speed >= XFER_SW_DMA_0) {
                 i = 1 << (speed - XFER_SW_DMA_0);
                 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
+        } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
+                i = speed - XFER_PIO_4;
+                id[ATA_ID_CFA_MODES] |= i << 6;
         }
 
         if (!drive->init_speed)