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
14#define fd_inb(port)			inb_p(port)
15#define fd_outb(value,port)		outb_p(value,port)
16
17#define fd_enable_dma()         enable_dma(FLOPPY_DMA)
18#define fd_disable_dma()        disable_dma(FLOPPY_DMA)
19#define fd_request_dma()        request_dma(FLOPPY_DMA,"floppy")
20#define fd_free_dma()           free_dma(FLOPPY_DMA)
21#define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
22#define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA,mode)
23#define fd_set_dma_addr(addr)   set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
24#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
25#define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
26#define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
27#define fd_cacheflush(addr,size) /* nothing */
28#define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt,\
29					    0, "floppy", NULL)
30#define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL)
31
32#ifdef CONFIG_PCI
33
34#include <linux/pci.h>
35
36#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
37
38static __inline__ int
39alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
40{
41	static unsigned long prev_size;
42	static dma_addr_t bus_addr = 0;
43	static char *prev_addr;
44	static int prev_dir;
45	int dir;
46
47	dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
48
49	if (bus_addr
50	    && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
51		/* different from last time -- unmap prev */
52		pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
53		bus_addr = 0;
54	}
55
56	if (!bus_addr)	/* need to map it */
57		bus_addr = pci_map_single(isa_bridge, addr, size, dir);
58
59	/* remember this one as prev */
60	prev_addr = addr;
61	prev_size = size;
62	prev_dir = dir;
63
64	fd_clear_dma_ff();
65	fd_cacheflush(addr, size);
66	fd_set_dma_mode(mode);
67	set_dma_addr(FLOPPY_DMA, bus_addr);
68	fd_set_dma_count(size);
69	virtual_dma_port = io;
70	fd_enable_dma();
71
72	return 0;
73}
74
75#endif /* CONFIG_PCI */
76
77__inline__ void virtual_dma_init(void)
78{
79	/* Nothing to do on an Alpha */
80}
81
82static int FDC1 = 0x3f0;
83static int FDC2 = -1;
84
85/*
86 * Again, the CMOS information doesn't work on the alpha..
87 */
88#define FLOPPY0_TYPE 6
89#define FLOPPY1_TYPE 0
90
91#define N_FDC 2
92#define N_DRIVE 8
93
94/*
95 * Most Alphas have no problems with floppy DMA crossing 64k borders,
96 * except for certain ones, like XL and RUFFIAN.
97 *
98 * However, the test is simple and fast, and this *is* floppy, after all,
99 * so we do it for all platforms, just to make sure.
100 *
101 * This is advantageous in other circumstances as well, as in moving
102 * about the PCI DMA windows and forcing the floppy to start doing
103 * scatter-gather when it never had before, and there *is* a problem
104 * on that platform... ;-}
105 */
106
107static inline unsigned long CROSS_64KB(void *a, unsigned long s)
108{
109	unsigned long p = (unsigned long)a;
110	return ((p + s - 1) ^ p) & ~0xffffUL;
111}
112
113#define EXTRA_FLOPPY_PARAMS
114
115#endif /* __ASM_ALPHA_FLOPPY_H */
116