4313a24985
All architecture-independent users of virt_to_bus() and bus_to_virt() have been fixed to use the dma mapping interfaces or have been removed now. This means the definitions on most architectures, and the CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed. The only exceptions to this are a few network and scsi drivers for m68k Amiga and VME machines and ppc32 Macintosh. These drivers work correctly with the old interfaces and are probably not worth changing. On alpha and parisc, virt_to_bus() were still used in asm/floppy.h. alpha can use isa_virt_to_bus() like x86 does, and parisc can just open-code the virt_to_phys() here, as this is architecture specific code. I tried updating the bus-virt-phys-mapping.rst documentation, which started as an email from Linus to explain some details of the Linux-2.0 driver interfaces. The bits about virt_to_bus() were declared obsolete backin 2000, and the rest is not all that relevant any more, so in the end I just decided to remove the file completely. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Arnd Bergmann <arnd@arndb.de>
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
|
|
* Architecture specific parts of the Floppy driver
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1995
|
|
*/
|
|
#ifndef __ASM_ALPHA_FLOPPY_H
|
|
#define __ASM_ALPHA_FLOPPY_H
|
|
|
|
|
|
#define fd_inb(base, reg) inb_p((base) + (reg))
|
|
#define fd_outb(value, base, reg) outb_p(value, (base) + (reg))
|
|
|
|
#define fd_enable_dma() enable_dma(FLOPPY_DMA)
|
|
#define fd_disable_dma() disable_dma(FLOPPY_DMA)
|
|
#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
|
|
#define fd_free_dma() free_dma(FLOPPY_DMA)
|
|
#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
|
|
#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
|
|
#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,isa_virt_to_bus(addr))
|
|
#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
|
|
#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
|
|
#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
|
|
#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
|
|
0, "floppy", NULL)
|
|
#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
#include <linux/pci.h>
|
|
|
|
#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
|
|
|
|
static __inline__ int
|
|
alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
|
|
{
|
|
static unsigned long prev_size;
|
|
static dma_addr_t bus_addr = 0;
|
|
static char *prev_addr;
|
|
static int prev_dir;
|
|
int dir;
|
|
|
|
dir = (mode != DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
|
|
|
if (bus_addr
|
|
&& (addr != prev_addr || size != prev_size || dir != prev_dir)) {
|
|
/* different from last time -- unmap prev */
|
|
dma_unmap_single(&isa_bridge->dev, bus_addr, prev_size,
|
|
prev_dir);
|
|
bus_addr = 0;
|
|
}
|
|
|
|
if (!bus_addr) /* need to map it */
|
|
bus_addr = dma_map_single(&isa_bridge->dev, addr, size, dir);
|
|
|
|
/* remember this one as prev */
|
|
prev_addr = addr;
|
|
prev_size = size;
|
|
prev_dir = dir;
|
|
|
|
fd_clear_dma_ff();
|
|
fd_set_dma_mode(mode);
|
|
set_dma_addr(FLOPPY_DMA, bus_addr);
|
|
fd_set_dma_count(size);
|
|
virtual_dma_port = io;
|
|
fd_enable_dma();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|
|
__inline__ void virtual_dma_init(void)
|
|
{
|
|
/* Nothing to do on an Alpha */
|
|
}
|
|
|
|
static int FDC1 = 0x3f0;
|
|
static int FDC2 = -1;
|
|
|
|
/*
|
|
* Again, the CMOS information doesn't work on the alpha..
|
|
*/
|
|
#define FLOPPY0_TYPE 6
|
|
#define FLOPPY1_TYPE 0
|
|
|
|
#define N_FDC 2
|
|
#define N_DRIVE 8
|
|
|
|
/*
|
|
* Most Alphas have no problems with floppy DMA crossing 64k borders,
|
|
* except for certain ones, like XL and RUFFIAN.
|
|
*
|
|
* However, the test is simple and fast, and this *is* floppy, after all,
|
|
* so we do it for all platforms, just to make sure.
|
|
*
|
|
* This is advantageous in other circumstances as well, as in moving
|
|
* about the PCI DMA windows and forcing the floppy to start doing
|
|
* scatter-gather when it never had before, and there *is* a problem
|
|
* on that platform... ;-}
|
|
*/
|
|
|
|
static inline unsigned long CROSS_64KB(void *a, unsigned long s)
|
|
{
|
|
unsigned long p = (unsigned long)a;
|
|
return ((p + s - 1) ^ p) & ~0xffffUL;
|
|
}
|
|
|
|
#define EXTRA_FLOPPY_PARAMS
|
|
|
|
#endif /* __ASM_ALPHA_FLOPPY_H */
|