block/swim: Rename macros to avoid inconsistent inverted logic

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>

diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 7b847170cf7181388e799deb17ae2aabda0b2d69..d1ee4670666a6026fd3da4c4a8bf54d0c04d31f2 100644 (file)
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -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

diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index af51015d056eff1a6b1a2dfac264e30259c669d9..469541c1e51eed13b589f47b295f0e916ade4170 100644 (file)
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -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