Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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 */ | |
afedfd01 | 28 | #define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\ |
d18ecedc | 29 | IRQF_DISABLED, "floppy", NULL) |
1da177e4 LT |
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 | ||
38 | static __inline__ int | |
39 | alpha_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 | ||
82 | static int FDC1 = 0x3f0; | |
83 | static 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 | ||
1da177e4 LT |
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 | ||
107 | static 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 */ |