diff options
| author | Willy Tarreau <w@1wt.eu> | 2020-03-01 20:55:54 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-16 08:26:58 -0600 |
| commit | e2032464fe189c33005a6296fa67c47d2fea4d05 (patch) | |
| tree | 680f1d6330335d05a7cda5489476e42342d2c01e /include | |
| parent | ac7018614dd958c68ffbb67e8eb6826e1533b96e (diff) | |
floppy: separate the FDC's base address from its registers
FDC registers FD_STATUS, FD_DATA, FD_DOR, FD_DIR and FD_DCR used to be
defined relative to FD_IOPORT, which is the FDC's base address, itself
a macro depending on the "fdc" local or global variable.
This patch changes this so that the register macros above now only
reference the address offset, and that the FDC's address is explicitly
passed in each call to fd_inb() and fd_outb(), thus removing the macro.
With this change there is no more implicit usage of the local/global
"fdc" variable.
One place in the ARM code used to check if the port was equal to FD_DOR,
this was changed to testing the register by applying a mask to the port,
as was already done in the sparc code.
There are still occurrences of fd_inb() and fd_outb() in the PARISC
code and these ones remain unaffected since they already used to work
with a base address and a register offset.
The sparc, m68k and parisc code could now be slightly cleaned up to
benefit from the macro definitions above instead of the equivalent
hard-coded values.
Link: https://lore.kernel.org/r/20200301195555.11154-6-w@1wt.eu
Cc: Ian Molton <spyro@f2s.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/fdreg.h | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/include/uapi/linux/fdreg.h b/include/uapi/linux/fdreg.h index 5e2981d5c523..1318881954e1 100644 --- a/include/uapi/linux/fdreg.h +++ b/include/uapi/linux/fdreg.h @@ -7,26 +7,18 @@ * Handbook", Sanches and Canton. */ -#ifdef FDPATCHES -#define FD_IOPORT fdc_state[fdc].address -#else -/* It would be a lot saner just to force fdc_state[fdc].address to always - be set ! FIXME */ -#define FD_IOPORT 0x3f0 -#endif - /* Fd controller regs. S&C, about page 340 */ -#define FD_STATUS (4 + FD_IOPORT ) -#define FD_DATA (5 + FD_IOPORT ) +#define FD_STATUS 4 +#define FD_DATA 5 /* Digital Output Register */ -#define FD_DOR (2 + FD_IOPORT ) +#define FD_DOR 2 /* Digital Input Register (read) */ -#define FD_DIR (7 + FD_IOPORT ) +#define FD_DIR 7 /* Diskette Control Register (write)*/ -#define FD_DCR (7 + FD_IOPORT ) +#define FD_DCR 7 /* Bits of main status register */ #define STATUS_BUSYMASK 0x0F /* drive busy mask */ |