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block/swim: Rename macros to avoid inconsistent inverted logic

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The Sony drive status bits use active-low logic. The swim_readbit()
function converts that to 'C' logic for readability. Hence, the
sense of the names of the status bit macros should not be inverted.

Mostly they are correct. However, the TWOMEG_DRIVE, MFM_MODE and
TWOMEG_MEDIA macros have inverted sense (like MkLinux). Fix this
inconsistency and make the following patches less confusing.

The same problem affects swim3.c so fix that too.

No functional change.

The FDHD drive status bits are documented in sonydriv.cpp from MAME
and in swimiii.h from MkLinux.

Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Finn Thain 2018-04-11 20:50:14 -04:00 committed by Jens Axboe
parent 8e2ab5a4ef
commit 56a1c5ee54
2 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/block/swim.c
View File

@ -110,7 +110,7 @@ struct iwm {
/* Select values for swim_select and swim_readbit */
#define READ_DATA_0 0x074
#define TWOMEG_DRIVE 0x075
#define ONEMEG_DRIVE 0x075
#define SINGLE_SIDED 0x076
#define DRIVE_PRESENT 0x077
#define DISK_IN 0x170
@ -118,9 +118,9 @@ struct iwm {
#define TRACK_ZERO 0x172
#define TACHO 0x173
#define READ_DATA_1 0x174
#define MFM_MODE 0x175
#define GCR_MODE 0x175
#define SEEK_COMPLETE 0x176
#define ONEMEG_MEDIA 0x177
#define TWOMEG_MEDIA 0x177
/* Bits in handshake register */
@ -612,7 +612,7 @@ static void setup_medium(struct floppy_state *fs)
struct floppy_struct *g;
fs->disk_in = 1;
fs->write_protected = swim_readbit(base, WRITE_PROT);
fs->type = swim_readbit(base, ONEMEG_MEDIA);
fs->type = swim_readbit(base, TWOMEG_MEDIA);
if (swim_track00(base))
printk(KERN_ERR

6
drivers/block/swim3.c
View File

@ -148,7 +148,7 @@ struct swim3 {
#define MOTOR_ON 2
#define RELAX 3 /* also eject in progress */
#define READ_DATA_0 4
#define TWOMEG_DRIVE 5
#define ONEMEG_DRIVE 5
#define SINGLE_SIDED 6 /* drive or diskette is 4MB type? */
#define DRIVE_PRESENT 7
#define DISK_IN 8
@ -156,9 +156,9 @@ struct swim3 {
#define TRACK_ZERO 10
#define TACHO 11
#define READ_DATA_1 12
#define MFM_MODE 13
#define GCR_MODE 13
#define SEEK_COMPLETE 14
#define ONEMEG_MEDIA 15
#define TWOMEG_MEDIA 15
/* Definitions of values used in writing and formatting */
#define DATA_ESCAPE 0x99