This source file includes following definitions.
- claim_dma_lock
- release_dma_lock
- fd_inb
- fd_outb
- fd_request_irq
- fd_free_irq
- m68k_floppy_init
- vdma_request_dma
- vdma_get_dma_residue
- vdma_mem_alloc
- _fd_dma_mem_free
- vdma_dma_setup
- fd_disable_dma
- floppy_hardint
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 #include <asm/io.h>
17
18 #include <linux/vmalloc.h>
19
20 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id);
21
22
23
24 #undef MAX_DMA_ADDRESS
25 #define MAX_DMA_ADDRESS 0x00
26
27
28
29
30
31 #define FLOPPY0_TYPE (MACH_IS_Q40 ? 6 : 4)
32 #define FLOPPY1_TYPE 0
33
34
35 #define FDC1 m68k_floppy_init()
36
37 #define N_FDC 1
38 #define N_DRIVE 8
39
40
41
42
43 static int virtual_dma_count=0;
44 static int virtual_dma_residue=0;
45 static char *virtual_dma_addr=NULL;
46 static int virtual_dma_mode=0;
47 static int doing_pdma=0;
48
49 #include <asm/sun3xflop.h>
50
51 extern spinlock_t dma_spin_lock;
52
53 static __inline__ unsigned long claim_dma_lock(void)
54 {
55 unsigned long flags;
56 spin_lock_irqsave(&dma_spin_lock, flags);
57 return flags;
58 }
59
60 static __inline__ void release_dma_lock(unsigned long flags)
61 {
62 spin_unlock_irqrestore(&dma_spin_lock, flags);
63 }
64
65
66 static __inline__ unsigned char fd_inb(int port)
67 {
68 if(MACH_IS_Q40)
69 return inb_p(port);
70 else if(MACH_IS_SUN3X)
71 return sun3x_82072_fd_inb(port);
72 return 0;
73 }
74
75 static __inline__ void fd_outb(unsigned char value, int port)
76 {
77 if(MACH_IS_Q40)
78 outb_p(value, port);
79 else if(MACH_IS_SUN3X)
80 sun3x_82072_fd_outb(value, port);
81 }
82
83
84 static int fd_request_irq(void)
85 {
86 if(MACH_IS_Q40)
87 return request_irq(FLOPPY_IRQ, floppy_hardint,
88 0, "floppy", floppy_hardint);
89 else if(MACH_IS_SUN3X)
90 return sun3xflop_request_irq();
91 return -ENXIO;
92 }
93
94 static void fd_free_irq(void)
95 {
96 if(MACH_IS_Q40)
97 free_irq(FLOPPY_IRQ, floppy_hardint);
98 }
99
100 #define fd_request_dma() vdma_request_dma(FLOPPY_DMA,"floppy")
101 #define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA)
102 #define fd_dma_mem_alloc(size) vdma_mem_alloc(size)
103 #define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io)
104
105 #define fd_enable_irq()
106 #define fd_disable_irq()
107
108 #define fd_free_dma()
109
110
111 #define CROSS_64KB(a,s) (0)
112
113 #define DMA_MODE_READ 0x44
114 #define DMA_MODE_WRITE 0x48
115
116
117 static int m68k_floppy_init(void)
118 {
119 use_virtual_dma =1;
120 can_use_virtual_dma = 1;
121
122
123 if (MACH_IS_Q40)
124 return 0x3f0;
125 else if(MACH_IS_SUN3X)
126 return sun3xflop_init();
127 else
128 return -1;
129 }
130
131
132 static int vdma_request_dma(unsigned int dmanr, const char * device_id)
133 {
134 return 0;
135 }
136
137
138 static int vdma_get_dma_residue(unsigned int dummy)
139 {
140 return virtual_dma_count + virtual_dma_residue;
141 }
142
143
144 static unsigned long vdma_mem_alloc(unsigned long size)
145 {
146 return (unsigned long) vmalloc(size);
147
148 }
149
150 static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
151 {
152 vfree((void *)addr);
153 }
154 #define fd_dma_mem_free(addr,size) _fd_dma_mem_free(addr, size)
155
156
157
158
159 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
160 {
161 doing_pdma = 1;
162 virtual_dma_port = (MACH_IS_Q40 ? io : 0);
163 virtual_dma_mode = (mode == DMA_MODE_WRITE);
164 virtual_dma_addr = addr;
165 virtual_dma_count = size;
166 virtual_dma_residue = 0;
167 return 0;
168 }
169
170
171
172 static void fd_disable_dma(void)
173 {
174 doing_pdma = 0;
175 virtual_dma_residue += virtual_dma_count;
176 virtual_dma_count=0;
177 }
178
179
180
181
182
183 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id)
184 {
185 register unsigned char st;
186
187 #undef TRACE_FLPY_INT
188 #define NO_FLOPPY_ASSEMBLER
189
190 #ifdef TRACE_FLPY_INT
191 static int calls=0;
192 static int bytes=0;
193 static int dma_wait=0;
194 #endif
195 if(!doing_pdma) {
196 floppy_interrupt(irq, dev_id);
197 return IRQ_HANDLED;
198 }
199
200 #ifdef TRACE_FLPY_INT
201 if(!calls)
202 bytes = virtual_dma_count;
203 #endif
204
205 {
206 register int lcount;
207 register char *lptr;
208
209
210
211 st=1;
212 for(lcount=virtual_dma_count, lptr=virtual_dma_addr;
213 lcount; lcount--, lptr++) {
214 st=inb(virtual_dma_port+4) & 0xa0 ;
215 if(st != 0xa0)
216 break;
217 if(virtual_dma_mode)
218 outb_p(*lptr, virtual_dma_port+5);
219 else
220 *lptr = inb_p(virtual_dma_port+5);
221 }
222
223 virtual_dma_count = lcount;
224 virtual_dma_addr = lptr;
225 st = inb(virtual_dma_port+4);
226 }
227
228 #ifdef TRACE_FLPY_INT
229 calls++;
230 #endif
231 if(st == 0x20)
232 return IRQ_HANDLED;
233 if(!(st & 0x20)) {
234 virtual_dma_residue += virtual_dma_count;
235 virtual_dma_count=0;
236 #ifdef TRACE_FLPY_INT
237 pr_info("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n",
238 virtual_dma_count, virtual_dma_residue, calls, bytes,
239 dma_wait);
240 calls = 0;
241 dma_wait=0;
242 #endif
243 doing_pdma = 0;
244 floppy_interrupt(irq, dev_id);
245 return IRQ_HANDLED;
246 }
247 #ifdef TRACE_FLPY_INT
248 if(!virtual_dma_count)
249 dma_wait++;
250 #endif
251 return IRQ_HANDLED;
252 }
253
254 #define EXTRA_FLOPPY_PARAMS