1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  arch/arm/include/asm/floppy.h
4  *
5  *  Copyright (C) 1996-2000 Russell King
6  *
7  *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
8  */
9 #ifndef __ASM_ARM_FLOPPY_H
10 #define __ASM_ARM_FLOPPY_H
11 
12 #define fd_outb(val, base, reg)						\
13 	do {								\
14 		int new_val = (val);					\
15 		if ((reg) == FD_DOR) {					\
16 			if (new_val & 0xf0)				\
17 				new_val = (new_val & 0x0c) |		\
18 					  floppy_selects[new_val & 3];	\
19 			else						\
20 				new_val &= 0x0c;			\
21 		}							\
22 		outb(new_val, (base) + (reg));				\
23 	} while(0)
24 
25 #define fd_inb(base, reg)	inb((base) + (reg))
26 #define fd_request_irq()	request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
27 					    0,"floppy",NULL)
28 #define fd_free_irq()		free_irq(IRQ_FLOPPYDISK,NULL)
29 #define fd_disable_irq()	disable_irq(IRQ_FLOPPYDISK)
30 #define fd_enable_irq()		enable_irq(IRQ_FLOPPYDISK)
31 
fd_dma_setup(void * data,unsigned int length,unsigned int mode,unsigned long addr)32 static inline int fd_dma_setup(void *data, unsigned int length,
33 			       unsigned int mode, unsigned long addr)
34 {
35 	set_dma_mode(DMA_FLOPPY, mode);
36 	__set_dma_addr(DMA_FLOPPY, data);
37 	set_dma_count(DMA_FLOPPY, length);
38 	virtual_dma_port = addr;
39 	enable_dma(DMA_FLOPPY);
40 	return 0;
41 }
42 #define fd_dma_setup		fd_dma_setup
43 
44 #define fd_request_dma()	request_dma(DMA_FLOPPY,"floppy")
45 #define fd_free_dma()		free_dma(DMA_FLOPPY)
46 #define fd_disable_dma()	disable_dma(DMA_FLOPPY)
47 
48 /* need to clean up dma.h */
49 #define DMA_FLOPPYDISK		DMA_FLOPPY
50 
51 /* Floppy_selects is the list of DOR's to select drive fd
52  *
53  * On initialisation, the floppy list is scanned, and the drives allocated
54  * in the order that they are found.  This is done by seeking the drive
55  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
56  * then there is no floppy drive present.       [to be put back in again]
57  */
58 static unsigned char floppy_selects[4] = { 0x10, 0x21, 0x23, 0x33 };
59 
60 #define FDC1 (0x3f0)
61 
62 #define FLOPPY0_TYPE 4
63 #define FLOPPY1_TYPE 4
64 
65 #define N_FDC 1
66 #define N_DRIVE 4
67 
68 #define CROSS_64KB(a,s) (0)
69 
70 /*
71  * This allows people to reverse the order of
72  * fd0 and fd1, in case their hardware is
73  * strangely connected (as some RiscPCs
74  * and A5000s seem to be).
75  */
driveswap(int * ints,int dummy,int dummy2)76 static void driveswap(int *ints, int dummy, int dummy2)
77 {
78 	swap(floppy_selects[0], floppy_selects[1]);
79 }
80 
81 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
82 
83 #endif
84