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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 | ||
13 | #include <linux/config.h> | |
14 | ||
15 | #define fd_inb(port) inb_p(port) | |
16 | #define fd_outb(value,port) outb_p(value,port) | |
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 | ||
40 | static __inline__ int | |
41 | alpha_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(isa_bridge, 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(isa_bridge, 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 | ||
79 | __inline__ void virtual_dma_init(void) | |
80 | { | |
81 | /* Nothing to do on an Alpha */ | |
82 | } | |
83 | ||
84 | static int FDC1 = 0x3f0; | |
85 | static int FDC2 = -1; | |
86 | ||
87 | /* | |
88 | * Again, the CMOS information doesn't work on the alpha.. | |
89 | */ | |
90 | #define FLOPPY0_TYPE 6 | |
91 | #define FLOPPY1_TYPE 0 | |
92 | ||
93 | #define N_FDC 2 | |
94 | #define N_DRIVE 8 | |
95 | ||
96 | #define FLOPPY_MOTOR_MASK 0xf0 | |
97 | ||
98 | /* | |
99 | * Most Alphas have no problems with floppy DMA crossing 64k borders, | |
100 | * except for certain ones, like XL and RUFFIAN. | |
101 | * | |
102 | * However, the test is simple and fast, and this *is* floppy, after all, | |
103 | * so we do it for all platforms, just to make sure. | |
104 | * | |
105 | * This is advantageous in other circumstances as well, as in moving | |
106 | * about the PCI DMA windows and forcing the floppy to start doing | |
107 | * scatter-gather when it never had before, and there *is* a problem | |
108 | * on that platform... ;-} | |
109 | */ | |
110 | ||
111 | static inline unsigned long CROSS_64KB(void *a, unsigned long s) | |
112 | { | |
113 | unsigned long p = (unsigned long)a; | |
114 | return ((p + s - 1) ^ p) & ~0xffffUL; | |
115 | } | |
116 | ||
117 | #define EXTRA_FLOPPY_PARAMS | |
118 | ||
119 | #endif /* __ASM_ALPHA_FLOPPY_H */ |