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[linux-2.6.git] / include / asm-powerpc / floppy.h
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_POWERPC_FLOPPY_H
11 #define __ASM_POWERPC_FLOPPY_H
12 #ifdef __KERNEL__
13
14 #include <linux/config.h>
15 #include <asm/machdep.h>
16
17 #define fd_inb(port)            inb_p(port)
18 #define fd_outb(value,port)     outb_p(value,port)
19
20 #define fd_enable_dma()         enable_dma(FLOPPY_DMA)
21 #define fd_disable_dma()        disable_dma(FLOPPY_DMA)
22 #define fd_request_dma()        request_dma(FLOPPY_DMA, "floppy")
23 #define fd_free_dma()           free_dma(FLOPPY_DMA)
24 #define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
25 #define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA, mode)
26 #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
27 #define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
28 #define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
29 #define fd_cacheflush(addr,size) /* nothing */
30 #define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
31                                             SA_INTERRUPT|SA_SAMPLE_RANDOM, \
32                                             "floppy", NULL)
33 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
34
35 #ifdef CONFIG_PCI
36
37 #include <linux/pci.h>
38 #include <asm/ppc-pci.h>        /* for ppc64_isabridge_dev */
39
40 #define fd_dma_setup(addr,size,mode,io) powerpc_fd_dma_setup(addr,size,mode,io)
41
42 static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
43                                            int mode, int io)
44 {
45         static unsigned long prev_size;
46         static dma_addr_t bus_addr = 0;
47         static char *prev_addr;
48         static int prev_dir;
49         int dir;
50
51         dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
52
53         if (bus_addr 
54             && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
55                 /* different from last time -- unmap prev */
56                 pci_unmap_single(ppc64_isabridge_dev, bus_addr, prev_size, prev_dir);
57                 bus_addr = 0;
58         }
59
60         if (!bus_addr)  /* need to map it */
61                 bus_addr = pci_map_single(ppc64_isabridge_dev, addr, size, dir);
62
63         /* remember this one as prev */
64         prev_addr = addr;
65         prev_size = size;
66         prev_dir = dir;
67
68         fd_clear_dma_ff();
69         fd_cacheflush(addr, size);
70         fd_set_dma_mode(mode);
71         set_dma_addr(FLOPPY_DMA, bus_addr);
72         fd_set_dma_count(size);
73         virtual_dma_port = io;
74         fd_enable_dma();
75
76         return 0;
77 }
78
79 #endif /* CONFIG_PCI */
80
81 __inline__ void virtual_dma_init(void)
82 {
83         /* Nothing to do on PowerPC */
84 }
85
86 static int FDC1 = 0x3f0;
87 static int FDC2 = -1;
88
89 /*
90  * Again, the CMOS information not available
91  */
92 #define FLOPPY0_TYPE 6
93 #define FLOPPY1_TYPE 0
94
95 #define N_FDC 2                 /* Don't change this! */
96 #define N_DRIVE 8
97
98 #define FLOPPY_MOTOR_MASK 0xf0
99
100 /*
101  * The PowerPC has no problems with floppy DMA crossing 64k borders.
102  */
103 #define CROSS_64KB(a,s) (0)
104
105 #define EXTRA_FLOPPY_PARAMS
106
107 #endif /* __KERNEL__ */
108 #endif /* __ASM_POWERPC_FLOPPY_H */