xref: /openbmc/linux/arch/mips/include/asm/floppy.h (revision ca55b2fe)
1 /*
2  * Architecture specific parts of the Floppy driver
3  *
4  * This file is subject to the terms and conditions of the GNU General Public
5  * License.  See the file "COPYING" in the main directory of this archive
6  * for more details.
7  *
8  * Copyright (C) 1995 - 2000 Ralf Baechle
9  */
10 #ifndef _ASM_FLOPPY_H
11 #define _ASM_FLOPPY_H
12 
13 #include <linux/dma-mapping.h>
14 
15 static inline void fd_cacheflush(char * addr, long size)
16 {
17 	dma_cache_sync(NULL, addr, size, DMA_BIDIRECTIONAL);
18 }
19 
20 #define MAX_BUFFER_SECTORS 24
21 
22 
23 /*
24  * And on Mips's the CMOS info fails also ...
25  *
26  * FIXME: This information should come from the ARC configuration tree
27  *	  or wherever a particular machine has stored this ...
28  */
29 #define FLOPPY0_TYPE		fd_drive_type(0)
30 #define FLOPPY1_TYPE		fd_drive_type(1)
31 
32 #define FDC1			fd_getfdaddr1()
33 
34 #define N_FDC 1			/* do you *really* want a second controller? */
35 #define N_DRIVE 8
36 
37 /*
38  * The DMA channel used by the floppy controller cannot access data at
39  * addresses >= 16MB
40  *
41  * Went back to the 1MB limit, as some people had problems with the floppy
42  * driver otherwise. It doesn't matter much for performance anyway, as most
43  * floppy accesses go through the track buffer.
44  *
45  * On MIPSes using vdma, this actually means that *all* transfers go thru
46  * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
47  * Actually this needs to be a bit more complicated since the so much different
48  * hardware available with MIPS CPUs ...
49  */
50 #define CROSS_64KB(a, s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
51 
52 #define EXTRA_FLOPPY_PARAMS
53 
54 #include <floppy.h>
55 
56 #endif /* _ASM_FLOPPY_H */
57