Merge libata branch 'chs-support' to latest upstream kernel.

[linux-2.6-block.git] / include / linux / ata.h

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 9d25e9886d60988bed36f0dc0371b92b8cd7aacc..85169ea9eb018bbee8f6a3253779119246399c77 100644 (file)
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -1,24 +1,29 @@
 
 /*
-   Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
-   Copyright 2003-2004 Jeff Garzik
-
-   The contents of this file are subject to the Open
-   Software License version 1.1 that can be found at
-   http://www.opensource.org/licenses/osl-1.1.txt and is included herein
-   by reference.
-
-   Alternatively, the contents of this file may be used under the terms
-   of the GNU General Public License version 2 (the "GPL") as distributed
-   in the kernel source COPYING file, in which case the provisions of
-   the GPL are applicable instead of the above.  If you wish to allow
-   the use of your version of this file only under the terms of the
-   GPL and not to allow others to use your version of this file under
-   the OSL, indicate your decision by deleting the provisions above and
-   replace them with the notice and other provisions required by the GPL.
-   If you do not delete the provisions above, a recipient may use your
-   version of this file under either the OSL or the GPL.
-
+ *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
+ *  Copyright 2003-2004 Jeff Garzik
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *  libata documentation is available via 'make {ps|pdf}docs',
+ *  as Documentation/DocBook/libata.*
+ *
+ *  Hardware documentation available from http://www.t13.org/
+ *
  */
 
 #ifndef __LINUX_ATA_H__
@@ -127,6 +132,7 @@ enum {
        ATA_CMD_PACKET          = 0xA0,
        ATA_CMD_VERIFY          = 0x40,
        ATA_CMD_VERIFY_EXT      = 0x42,
+       ATA_CMD_INIT_DEV_PARAMS = 0x91,
 
        /* SETFEATURES stuff */
        SETFEATURES_XFER        = 0x03,
@@ -176,6 +182,7 @@ enum {
        ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
        ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
        ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
+       ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 };
 
 enum ata_tf_protocols {
@@ -245,6 +252,18 @@ struct ata_taskfile {
          ((u64) (id)[(n) + 1] << 16) | \
          ((u64) (id)[(n) + 0]) )
 
+static inline int ata_id_current_chs_valid(u16 *id)
+{
+       /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 
+          has not been issued to the device then the values of 
+          id[54] to id[56] are vendor specific. */
+       return (id[53] & 0x01) && /* Current translation valid */
+               id[54] &&  /* cylinders in current translation */
+               id[55] &&  /* heads in current translation */
+               id[55] <= 16 &&
+               id[56];    /* sectors in current translation */
+}
+
 static inline int atapi_cdb_len(u16 *dev_id)
 {
        u16 tmp = dev_id[0] & 0x3;