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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-ppc/floppy.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-ppc/floppy.h')
-rw-r--r--include/asm-ppc/floppy.h182
1 files changed, 182 insertions, 0 deletions
diff --git a/include/asm-ppc/floppy.h b/include/asm-ppc/floppy.h
new file mode 100644
index 000000000000..8ccd4a276fe9
--- /dev/null
+++ b/include/asm-ppc/floppy.h
@@ -0,0 +1,182 @@
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#ifdef __KERNEL__
11#ifndef __ASM_PPC_FLOPPY_H
12#define __ASM_PPC_FLOPPY_H
13
14#define fd_inb(port) inb_p(port)
15#define fd_outb(value,port) outb_p(value,port)
16
17#define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA)
18#define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA)
19#define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA)
20#define fd_dma_setup(addr, size, mode, io) fd_ops->_dma_setup(addr, size, mode, io)
21#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
22#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
23#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
24
25static int fd_request_dma(void);
26
27struct fd_dma_ops {
28 void (*_disable_dma)(unsigned int dmanr);
29 void (*_free_dma)(unsigned int dmanr);
30 int (*_get_dma_residue)(unsigned int dummy);
31 int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
32};
33
34static int virtual_dma_count;
35static int virtual_dma_residue;
36static char *virtual_dma_addr;
37static int virtual_dma_mode;
38static int doing_vdma;
39static struct fd_dma_ops *fd_ops;
40
41static irqreturn_t floppy_hardint(int irq, void *dev_id, struct pt_regs * regs)
42{
43 unsigned char st;
44 int lcount;
45 char *lptr;
46
47 if (!doing_vdma)
48 return floppy_interrupt(irq, dev_id, regs);
49
50
51 st = 1;
52 for (lcount=virtual_dma_count, lptr=virtual_dma_addr;
53 lcount; lcount--, lptr++) {
54 st=inb(virtual_dma_port+4) & 0xa0 ;
55 if (st != 0xa0)
56 break;
57 if (virtual_dma_mode)
58 outb_p(*lptr, virtual_dma_port+5);
59 else
60 *lptr = inb_p(virtual_dma_port+5);
61 }
62 virtual_dma_count = lcount;
63 virtual_dma_addr = lptr;
64 st = inb(virtual_dma_port+4);
65
66 if (st == 0x20)
67 return IRQ_HANDLED;
68 if (!(st & 0x20)) {
69 virtual_dma_residue += virtual_dma_count;
70 virtual_dma_count=0;
71 doing_vdma = 0;
72 floppy_interrupt(irq, dev_id, regs);
73 return IRQ_HANDLED;
74 }
75 return IRQ_HANDLED;
76}
77
78static void vdma_disable_dma(unsigned int dummy)
79{
80 doing_vdma = 0;
81 virtual_dma_residue += virtual_dma_count;
82 virtual_dma_count=0;
83}
84
85static void vdma_nop(unsigned int dummy)
86{
87}
88
89
90static int vdma_get_dma_residue(unsigned int dummy)
91{
92 return virtual_dma_count + virtual_dma_residue;
93}
94
95
96static int fd_request_irq(void)
97{
98 if (can_use_virtual_dma)
99 return request_irq(FLOPPY_IRQ, floppy_hardint,SA_INTERRUPT,
100 "floppy", NULL);
101 else
102 return request_irq(FLOPPY_IRQ, floppy_interrupt,
103 SA_INTERRUPT|SA_SAMPLE_RANDOM,
104 "floppy", NULL);
105
106}
107
108static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
109{
110 doing_vdma = 1;
111 virtual_dma_port = io;
112 virtual_dma_mode = (mode == DMA_MODE_WRITE);
113 virtual_dma_addr = addr;
114 virtual_dma_count = size;
115 virtual_dma_residue = 0;
116 return 0;
117}
118
119static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
120{
121 /* actual, physical DMA */
122 doing_vdma = 0;
123 clear_dma_ff(FLOPPY_DMA);
124 set_dma_mode(FLOPPY_DMA,mode);
125 set_dma_addr(FLOPPY_DMA,(unsigned int)virt_to_bus(addr));
126 set_dma_count(FLOPPY_DMA,size);
127 enable_dma(FLOPPY_DMA);
128 return 0;
129}
130
131static struct fd_dma_ops real_dma_ops =
132{
133 ._disable_dma = disable_dma,
134 ._free_dma = free_dma,
135 ._get_dma_residue = get_dma_residue,
136 ._dma_setup = hard_dma_setup
137};
138
139static struct fd_dma_ops virt_dma_ops =
140{
141 ._disable_dma = vdma_disable_dma,
142 ._free_dma = vdma_nop,
143 ._get_dma_residue = vdma_get_dma_residue,
144 ._dma_setup = vdma_dma_setup
145};
146
147static int fd_request_dma()
148{
149 if (can_use_virtual_dma & 1) {
150 fd_ops = &virt_dma_ops;
151 return 0;
152 }
153 else {
154 fd_ops = &real_dma_ops;
155 return request_dma(FLOPPY_DMA, "floppy");
156 }
157}
158
159static int FDC1 = 0x3f0;
160static int FDC2 = -1;
161
162/*
163 * Again, the CMOS information not available
164 */
165#define FLOPPY0_TYPE 6
166#define FLOPPY1_TYPE 0
167
168#define N_FDC 2 /* Don't change this! */
169#define N_DRIVE 8
170
171#define FLOPPY_MOTOR_MASK 0xf0
172
173/*
174 * The PowerPC has no problems with floppy DMA crossing 64k borders.
175 */
176#define CROSS_64KB(a,s) (0)
177
178#endif /* __ASM_PPC_FLOPPY_H */
179
180#define EXTRA_FLOPPY_PARAMS
181
182#endif /* __KERNEL__ */