tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
42static __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
86static int FDC1 = 0x3f0;
87static 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 */