via82cxxx: add support for VT6415 PCIE PATA IDE Host Controller

[safe/jmp/linux-2.6] / drivers / ide / sis5513.c

diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c
index afca22b..4687060 100644 (file)
--- a/drivers/ide/sis5513.c
+++ b/drivers/ide/sis5513.c
@@ -2,7 +2,7 @@
  * Copyright (C) 1999-2000     Andre Hedrick <andre@linux-ide.org>
  * Copyright (C) 2002          Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
  * Copyright (C) 2003          Vojtech Pavlik <vojtech@suse.cz>
- * Copyright (C) 2007          Bartlomiej Zolnierkiewicz
+ * Copyright (C) 2007-2009     Bartlomiej Zolnierkiewicz
  *
  * May be copied or modified under the terms of the GNU General Public License
  *
@@ -281,11 +281,13 @@ static void config_drive_art_rwp(ide_drive_t *drive)
 
        pci_read_config_byte(dev, 0x4b, &reg4bh);
 
+       rw_prefetch = reg4bh & ~(0x11 << drive->dn);
+
        if (drive->media == ide_disk)
-               rw_prefetch = 0x11 << drive->dn;
+               rw_prefetch |= 0x11 << drive->dn;
 
-       if ((reg4bh & (0x11 << drive->dn)) != rw_prefetch)
-               pci_write_config_byte(dev, 0x4b, reg4bh|rw_prefetch);
+       if (reg4bh != rw_prefetch)
+               pci_write_config_byte(dev, 0x4b, rw_prefetch);
 }
 
 static void sis_set_pio_mode(ide_drive_t *drive, const u8 pio)
@@ -630,12 +632,3 @@ module_exit(sis5513_ide_exit);
 MODULE_AUTHOR("Lionel Bouton, L C Chang, Andre Hedrick, Vojtech Pavlik");
 MODULE_DESCRIPTION("PCI driver module for SIS IDE");
 MODULE_LICENSE("GPL");
-
-/*
- * TODO:
- *     - CLEANUP
- *     - More checks in the config registers (force values instead of
- *       relying on the BIOS setting them correctly).
- *     - Further optimisations ?
- *       . for example ATA66+ regs 0x48 & 0x4A
- */