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
9 */
10#ifndef __ASM_ALPHA_FLOPPY_H
11#define __ASM_ALPHA_FLOPPY_H
12
13#include <linux/config.h>
14
15#define fd_inb(port)			inb_p(port)
16#define fd_outb(port,value)		outb_p(port,value)
17
18#define fd_enable_dma()         enable_dma(FLOPPY_DMA)
19#define fd_disable_dma()        disable_dma(FLOPPY_DMA)
20#define fd_request_dma()        request_dma(FLOPPY_DMA,"floppy")
21#define fd_free_dma()           free_dma(FLOPPY_DMA)
22#define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
23#define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA,mode)
24#define fd_set_dma_addr(addr)   set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
25#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
26#define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
27#define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
28#define fd_cacheflush(addr,size) /* nothing */
29#define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
30					    SA_INTERRUPT|SA_SAMPLE_RANDOM, \
31				            "floppy", NULL)
32#define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
33
34#ifdef CONFIG_PCI
35
36#include <linux/pci.h>
37
38#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
39
40static __inline__ int
41alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
42{
43	static unsigned long prev_size;
44	static dma_addr_t bus_addr = 0;
45	static char *prev_addr;
46	static int prev_dir;
47	int dir;
48
49	dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
50
51	if (bus_addr
52	    && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
53		/* different from last time -- unmap prev */
54		pci_unmap_single(NULL, bus_addr, prev_size, prev_dir);
55		bus_addr = 0;
56	}
57
58	if (!bus_addr)	/* need to map it */
59		bus_addr = pci_map_single(NULL, addr, size, dir);
60
61	/* remember this one as prev */
62	prev_addr = addr;
63	prev_size = size;
64	prev_dir = dir;
65
66	fd_clear_dma_ff();
67	fd_cacheflush(addr, size);
68	fd_set_dma_mode(mode);
69	set_dma_addr(FLOPPY_DMA, bus_addr);
70	fd_set_dma_count(size);
71	virtual_dma_port = io;
72	fd_enable_dma();
73
74	return 0;
75}
76
77#endif /* CONFIG_PCI */
78
79static int FDC1 = 0x3f0;
80static int FDC2 = -1;
81
82/*
83 * Again, the CMOS information doesn't work on the alpha..
84 */
85#define FLOPPY0_TYPE 6
86#define FLOPPY1_TYPE 0
87
88#define N_FDC 2
89#define N_DRIVE 8
90
91#define FLOPPY_MOTOR_MASK 0xf0
92
93/*
94 * Most Alphas have no problems with floppy DMA crossing 64k borders,
95 * except for XL and RUFFIAN.  They are also the only one with DMA
96 * limits, so we use that to test in the generic kernel.
97 */
98
99#define __CROSS_64KB(a,s)					\
100({ unsigned long __s64 = (unsigned long)(a);			\
101   unsigned long __e64 = __s64 + (unsigned long)(s) - 1;	\
102   (__s64 ^ __e64) & ~0xfffful; })
103
104#ifdef CONFIG_ALPHA_GENERIC
105# define CROSS_64KB(a,s)   (__CROSS_64KB(a,s) && ~alpha_mv.max_dma_address)
106#else
107# if defined(CONFIG_ALPHA_XL) || defined(CONFIG_ALPHA_RUFFIAN) || defined(CONFIG_ALPHA_NAUTILUS)
108#  define CROSS_64KB(a,s)  __CROSS_64KB(a,s)
109# else
110#  define CROSS_64KB(a,s)  (0)
111# endif
112#endif
113
114#define EXTRA_FLOPPY_PARAMS
115
116#endif /* __ASM_ALPHA_FLOPPY_H */
117