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https://gitee.com/bianbu-linux/linux-6.6
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e72e8bf1c9
Currently we have architecture-specific fd_inb() and fd_outb() functions
or macros, taking just a port which is in fact made of a base address and
a register. The base address is FDC-specific and derived from the local or
global "fdc" variable through the FD_IOPORT macro used in the base address
calculation.
This change splits this by explicitly passing the FDC's base address and
the register separately to fd_outb() and fd_inb(). It affects the
following archs:
- x86, alpha, mips, powerpc, parisc, arm, m68k:
simple remap of port -> base+reg
- sparc32: use of reg only, since the base address was already masked
out and the FDC controller is known from a static struct.
- sparc64: like x86 for PCI, like sparc32 for 82077
Some archs use inline functions and others macros. This was not
unified in order to minimize the number of changes to review. For the
same reason checkpatch still spews a few warnings about things that
were already there before.
The parisc still uses hard-coded register values and could be cleaned up
by taking the register definitions.
The sparc per-controller inb/outb functions could further be refined
to explicitly take an FDC register instead of a port in argument but it
was not needed yet and may be cleaned later.
Link: https://lore.kernel.org/r/20200331094054.24441-2-w@1wt.eu
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Ian Molton <spyro@f2s.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: x86@kernel.org
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Denis Efremov <efremov@linux.com>
134 lines
2.5 KiB
C
134 lines
2.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 1997, 1998, 2003 by Ralf Baechle
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*/
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#ifndef __ASM_MACH_GENERIC_FLOPPY_H
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#define __ASM_MACH_GENERIC_FLOPPY_H
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/linkage.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <asm/bootinfo.h>
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#include <asm/cachectl.h>
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#include <asm/dma.h>
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#include <asm/floppy.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/pgtable.h>
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/*
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* How to access the FDC's registers.
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*/
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static inline unsigned char fd_inb(unsigned int base, unsigned int reg)
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{
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return inb_p(base + reg);
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}
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static inline void fd_outb(unsigned char value, unsigned int base, unsigned int reg)
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{
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outb_p(value, base + reg);
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}
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/*
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* How to access the floppy DMA functions.
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*/
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static inline void fd_enable_dma(void)
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{
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enable_dma(FLOPPY_DMA);
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}
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static inline void fd_disable_dma(void)
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{
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disable_dma(FLOPPY_DMA);
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}
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static inline int fd_request_dma(void)
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{
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return request_dma(FLOPPY_DMA, "floppy");
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}
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static inline void fd_free_dma(void)
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{
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free_dma(FLOPPY_DMA);
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}
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static inline void fd_clear_dma_ff(void)
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{
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clear_dma_ff(FLOPPY_DMA);
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}
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static inline void fd_set_dma_mode(char mode)
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{
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set_dma_mode(FLOPPY_DMA, mode);
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}
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static inline void fd_set_dma_addr(char *addr)
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{
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set_dma_addr(FLOPPY_DMA, (unsigned long) addr);
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}
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static inline void fd_set_dma_count(unsigned int count)
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{
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set_dma_count(FLOPPY_DMA, count);
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}
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static inline int fd_get_dma_residue(void)
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{
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return get_dma_residue(FLOPPY_DMA);
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}
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static inline void fd_enable_irq(void)
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{
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enable_irq(FLOPPY_IRQ);
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}
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static inline void fd_disable_irq(void)
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{
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disable_irq(FLOPPY_IRQ);
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}
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static inline int fd_request_irq(void)
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{
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return request_irq(FLOPPY_IRQ, floppy_interrupt,
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0, "floppy", NULL);
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}
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static inline void fd_free_irq(void)
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{
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free_irq(FLOPPY_IRQ, NULL);
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}
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#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
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static inline unsigned long fd_getfdaddr1(void)
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{
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return 0x3f0;
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}
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static inline unsigned long fd_dma_mem_alloc(unsigned long size)
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{
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return __get_dma_pages(GFP_KERNEL, get_order(size));
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}
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static inline void fd_dma_mem_free(unsigned long addr, unsigned long size)
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{
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free_pages(addr, get_order(size));
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}
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static inline unsigned long fd_drive_type(unsigned long n)
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{
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if (n == 0)
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return 4; /* 3,5", 1.44mb */
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return 0;
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}
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#endif /* __ASM_MACH_GENERIC_FLOPPY_H */
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