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-rw-r--r--include/asm-parisc/floppy.h271
1 files changed, 0 insertions, 271 deletions
diff --git a/include/asm-parisc/floppy.h b/include/asm-parisc/floppy.h
deleted file mode 100644
index 4ca69f558fae..000000000000
--- a/include/asm-parisc/floppy.h
+++ /dev/null
@@ -1,271 +0,0 @@
1/* Architecture specific parts of the Floppy driver
2 *
3 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
4 * Copyright (C) 2000 Matthew Wilcox (willy a debian . org)
5 * Copyright (C) 2000 Dave Kennedy
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21#ifndef __ASM_PARISC_FLOPPY_H
22#define __ASM_PARISC_FLOPPY_H
23
24#include <linux/vmalloc.h>
25
26
27/*
28 * The DMA channel used by the floppy controller cannot access data at
29 * addresses >= 16MB
30 *
31 * Went back to the 1MB limit, as some people had problems with the floppy
32 * driver otherwise. It doesn't matter much for performance anyway, as most
33 * floppy accesses go through the track buffer.
34 */
35#define _CROSS_64KB(a,s,vdma) \
36(!vdma && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
37
38#define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)
39
40
41#define SW fd_routine[use_virtual_dma&1]
42#define CSW fd_routine[can_use_virtual_dma & 1]
43
44
45#define fd_inb(port) readb(port)
46#define fd_outb(value, port) writeb(value, port)
47
48#define fd_request_dma() CSW._request_dma(FLOPPY_DMA,"floppy")
49#define fd_free_dma() CSW._free_dma(FLOPPY_DMA)
50#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
51#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
52#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
53#define fd_get_dma_residue() SW._get_dma_residue(FLOPPY_DMA)
54#define fd_dma_mem_alloc(size) SW._dma_mem_alloc(size)
55#define fd_dma_setup(addr, size, mode, io) SW._dma_setup(addr, size, mode, io)
56
57#define FLOPPY_CAN_FALLBACK_ON_NODMA
58
59static int virtual_dma_count=0;
60static int virtual_dma_residue=0;
61static char *virtual_dma_addr=0;
62static int virtual_dma_mode=0;
63static int doing_pdma=0;
64
65static void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs)
66{
67 register unsigned char st;
68
69#undef TRACE_FLPY_INT
70
71#ifdef TRACE_FLPY_INT
72 static int calls=0;
73 static int bytes=0;
74 static int dma_wait=0;
75#endif
76 if (!doing_pdma) {
77 floppy_interrupt(irq, dev_id, regs);
78 return;
79 }
80
81#ifdef TRACE_FLPY_INT
82 if(!calls)
83 bytes = virtual_dma_count;
84#endif
85
86 {
87 register int lcount;
88 register char *lptr = virtual_dma_addr;
89
90 for (lcount = virtual_dma_count; lcount; lcount--) {
91 st = fd_inb(virtual_dma_port+4) & 0xa0 ;
92 if (st != 0xa0)
93 break;
94 if (virtual_dma_mode) {
95 fd_outb(*lptr, virtual_dma_port+5);
96 } else {
97 *lptr = fd_inb(virtual_dma_port+5);
98 }
99 lptr++;
100 }
101 virtual_dma_count = lcount;
102 virtual_dma_addr = lptr;
103 st = fd_inb(virtual_dma_port+4);
104 }
105
106#ifdef TRACE_FLPY_INT
107 calls++;
108#endif
109 if (st == 0x20)
110 return;
111 if (!(st & 0x20)) {
112 virtual_dma_residue += virtual_dma_count;
113 virtual_dma_count = 0;
114#ifdef TRACE_FLPY_INT
115 printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n",
116 virtual_dma_count, virtual_dma_residue, calls, bytes,
117 dma_wait);
118 calls = 0;
119 dma_wait=0;
120#endif
121 doing_pdma = 0;
122 floppy_interrupt(irq, dev_id, regs);
123 return;
124 }
125#ifdef TRACE_FLPY_INT
126 if (!virtual_dma_count)
127 dma_wait++;
128#endif
129}
130
131static void fd_disable_dma(void)
132{
133 if(! (can_use_virtual_dma & 1))
134 disable_dma(FLOPPY_DMA);
135 doing_pdma = 0;
136 virtual_dma_residue += virtual_dma_count;
137 virtual_dma_count=0;
138}
139
140static int vdma_request_dma(unsigned int dmanr, const char * device_id)
141{
142 return 0;
143}
144
145static void vdma_nop(unsigned int dummy)
146{
147}
148
149
150static int vdma_get_dma_residue(unsigned int dummy)
151{
152 return virtual_dma_count + virtual_dma_residue;
153}
154
155
156static int fd_request_irq(void)
157{
158 if(can_use_virtual_dma)
159 return request_irq(FLOPPY_IRQ, floppy_hardint,
160 IRQF_DISABLED, "floppy", NULL);
161 else
162 return request_irq(FLOPPY_IRQ, floppy_interrupt,
163 IRQF_DISABLED, "floppy", NULL);
164}
165
166static unsigned long dma_mem_alloc(unsigned long size)
167{
168 return __get_dma_pages(GFP_KERNEL, get_order(size));
169}
170
171
172static unsigned long vdma_mem_alloc(unsigned long size)
173{
174 return (unsigned long) vmalloc(size);
175
176}
177
178#define nodma_mem_alloc(size) vdma_mem_alloc(size)
179
180static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
181{
182 if((unsigned int) addr >= (unsigned int) high_memory)
183 return vfree((void *)addr);
184 else
185 free_pages(addr, get_order(size));
186}
187
188#define fd_dma_mem_free(addr, size) _fd_dma_mem_free(addr, size)
189
190static void _fd_chose_dma_mode(char *addr, unsigned long size)
191{
192 if(can_use_virtual_dma == 2) {
193 if((unsigned int) addr >= (unsigned int) high_memory ||
194 virt_to_bus(addr) >= 0x1000000 ||
195 _CROSS_64KB(addr, size, 0))
196 use_virtual_dma = 1;
197 else
198 use_virtual_dma = 0;
199 } else {
200 use_virtual_dma = can_use_virtual_dma & 1;
201 }
202}
203
204#define fd_chose_dma_mode(addr, size) _fd_chose_dma_mode(addr, size)
205
206
207static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
208{
209 doing_pdma = 1;
210 virtual_dma_port = io;
211 virtual_dma_mode = (mode == DMA_MODE_WRITE);
212 virtual_dma_addr = addr;
213 virtual_dma_count = size;
214 virtual_dma_residue = 0;
215 return 0;
216}
217
218static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
219{
220#ifdef FLOPPY_SANITY_CHECK
221 if (CROSS_64KB(addr, size)) {
222 printk("DMA crossing 64-K boundary %p-%p\n", addr, addr+size);
223 return -1;
224 }
225#endif
226 /* actual, physical DMA */
227 doing_pdma = 0;
228 clear_dma_ff(FLOPPY_DMA);
229 set_dma_mode(FLOPPY_DMA,mode);
230 set_dma_addr(FLOPPY_DMA,virt_to_bus(addr));
231 set_dma_count(FLOPPY_DMA,size);
232 enable_dma(FLOPPY_DMA);
233 return 0;
234}
235
236static struct fd_routine_l {
237 int (*_request_dma)(unsigned int dmanr, const char * device_id);
238 void (*_free_dma)(unsigned int dmanr);
239 int (*_get_dma_residue)(unsigned int dummy);
240 unsigned long (*_dma_mem_alloc) (unsigned long size);
241 int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
242} fd_routine[] = {
243 {
244 request_dma,
245 free_dma,
246 get_dma_residue,
247 dma_mem_alloc,
248 hard_dma_setup
249 },
250 {
251 vdma_request_dma,
252 vdma_nop,
253 vdma_get_dma_residue,
254 vdma_mem_alloc,
255 vdma_dma_setup
256 }
257};
258
259
260static int FDC1 = 0x3f0; /* Lies. Floppy controller is memory mapped, not io mapped */
261static int FDC2 = -1;
262
263#define FLOPPY0_TYPE 0
264#define FLOPPY1_TYPE 0
265
266#define N_FDC 1
267#define N_DRIVE 8
268
269#define EXTRA_FLOPPY_PARAMS
270
271#endif /* __ASM_PARISC_FLOPPY_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 13:45:12 -0500