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