i386/x86_64: move headers to include/asm-x86
[linux-3.10.git] / include / asm-x86 / floppy_64.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_X86_64_FLOPPY_H
11 #define __ASM_X86_64_FLOPPY_H
12
13 #include <linux/vmalloc.h>
14
15
16 /*
17  * The DMA channel used by the floppy controller cannot access data at
18  * addresses >= 16MB
19  *
20  * Went back to the 1MB limit, as some people had problems with the floppy
21  * driver otherwise. It doesn't matter much for performance anyway, as most
22  * floppy accesses go through the track buffer.
23  */
24 #define _CROSS_64KB(a,s,vdma) \
25 (!(vdma) && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
26
27 #define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)
28
29
30 #define SW fd_routine[use_virtual_dma&1]
31 #define CSW fd_routine[can_use_virtual_dma & 1]
32
33
34 #define fd_inb(port)                    inb_p(port)
35 #define fd_outb(value,port)             outb_p(value,port)
36
37 #define fd_request_dma()        CSW._request_dma(FLOPPY_DMA,"floppy")
38 #define fd_free_dma()           CSW._free_dma(FLOPPY_DMA)
39 #define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
40 #define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
41 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL)
42 #define fd_get_dma_residue()    SW._get_dma_residue(FLOPPY_DMA)
43 #define fd_dma_mem_alloc(size)  SW._dma_mem_alloc(size)
44 #define fd_dma_setup(addr, size, mode, io) SW._dma_setup(addr, size, mode, io)
45
46 #define FLOPPY_CAN_FALLBACK_ON_NODMA
47
48 static int virtual_dma_count;
49 static int virtual_dma_residue;
50 static char *virtual_dma_addr;
51 static int virtual_dma_mode;
52 static int doing_pdma;
53
54 static irqreturn_t floppy_hardint(int irq, void *dev_id)
55 {
56         register unsigned char st;
57
58 #undef TRACE_FLPY_INT
59
60 #ifdef TRACE_FLPY_INT
61         static int calls=0;
62         static int bytes=0;
63         static int dma_wait=0;
64 #endif
65         if (!doing_pdma)
66                 return floppy_interrupt(irq, dev_id);
67
68 #ifdef TRACE_FLPY_INT
69         if(!calls)
70                 bytes = virtual_dma_count;
71 #endif
72
73         {
74                 register int lcount;
75                 register char *lptr;
76
77                 st = 1;
78                 for(lcount=virtual_dma_count, lptr=virtual_dma_addr; 
79                     lcount; lcount--, lptr++) {
80                         st=inb(virtual_dma_port+4) & 0xa0 ;
81                         if(st != 0xa0) 
82                                 break;
83                         if(virtual_dma_mode)
84                                 outb_p(*lptr, virtual_dma_port+5);
85                         else
86                                 *lptr = inb_p(virtual_dma_port+5);
87                 }
88                 virtual_dma_count = lcount;
89                 virtual_dma_addr = lptr;
90                 st = inb(virtual_dma_port+4);
91         }
92
93 #ifdef TRACE_FLPY_INT
94         calls++;
95 #endif
96         if(st == 0x20)
97                 return IRQ_HANDLED;
98         if(!(st & 0x20)) {
99                 virtual_dma_residue += virtual_dma_count;
100                 virtual_dma_count=0;
101 #ifdef TRACE_FLPY_INT
102                 printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", 
103                        virtual_dma_count, virtual_dma_residue, calls, bytes,
104                        dma_wait);
105                 calls = 0;
106                 dma_wait=0;
107 #endif
108                 doing_pdma = 0;
109                 floppy_interrupt(irq, dev_id);
110                 return IRQ_HANDLED;
111         }
112 #ifdef TRACE_FLPY_INT
113         if(!virtual_dma_count)
114                 dma_wait++;
115 #endif
116         return IRQ_HANDLED;
117 }
118
119 static void fd_disable_dma(void)
120 {
121         if(! (can_use_virtual_dma & 1))
122                 disable_dma(FLOPPY_DMA);
123         doing_pdma = 0;
124         virtual_dma_residue += virtual_dma_count;
125         virtual_dma_count=0;
126 }
127
128 static int vdma_request_dma(unsigned int dmanr, const char * device_id)
129 {
130         return 0;
131 }
132
133 static void vdma_nop(unsigned int dummy)
134 {
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 int fd_request_irq(void)
145 {
146         if(can_use_virtual_dma)
147                 return request_irq(FLOPPY_IRQ, floppy_hardint,
148                                    IRQF_DISABLED, "floppy", NULL);
149         else
150                 return request_irq(FLOPPY_IRQ, floppy_interrupt,
151                                    IRQF_DISABLED, "floppy", NULL);
152 }
153
154 static unsigned long dma_mem_alloc(unsigned long size)
155 {
156         return __get_dma_pages(GFP_KERNEL|__GFP_NORETRY,get_order(size));
157 }
158
159
160 static unsigned long vdma_mem_alloc(unsigned long size)
161 {
162         return (unsigned long) vmalloc(size);
163
164 }
165
166 #define nodma_mem_alloc(size) vdma_mem_alloc(size)
167
168 static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
169 {
170         if((unsigned long) addr >= (unsigned long) high_memory)
171                 vfree((void *)addr);
172         else
173                 free_pages(addr, get_order(size));              
174 }
175
176 #define fd_dma_mem_free(addr, size)  _fd_dma_mem_free(addr, size) 
177
178 static void _fd_chose_dma_mode(char *addr, unsigned long size)
179 {
180         if(can_use_virtual_dma == 2) {
181                 if((unsigned long) addr >= (unsigned long) high_memory ||
182                    isa_virt_to_bus(addr) >= 0x1000000 ||
183                    _CROSS_64KB(addr, size, 0))
184                         use_virtual_dma = 1;
185                 else
186                         use_virtual_dma = 0;
187         } else {
188                 use_virtual_dma = can_use_virtual_dma & 1;
189         }
190 }
191
192 #define fd_chose_dma_mode(addr, size) _fd_chose_dma_mode(addr, size)
193
194
195 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
196 {
197         doing_pdma = 1;
198         virtual_dma_port = io;
199         virtual_dma_mode = (mode  == DMA_MODE_WRITE);
200         virtual_dma_addr = addr;
201         virtual_dma_count = size;
202         virtual_dma_residue = 0;
203         return 0;
204 }
205
206 static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
207 {
208 #ifdef FLOPPY_SANITY_CHECK
209         if (CROSS_64KB(addr, size)) {
210                 printk("DMA crossing 64-K boundary %p-%p\n", addr, addr+size);
211                 return -1;
212         }
213 #endif
214         /* actual, physical DMA */
215         doing_pdma = 0;
216         clear_dma_ff(FLOPPY_DMA);
217         set_dma_mode(FLOPPY_DMA,mode);
218         set_dma_addr(FLOPPY_DMA,isa_virt_to_bus(addr));
219         set_dma_count(FLOPPY_DMA,size);
220         enable_dma(FLOPPY_DMA);
221         return 0;
222 }
223
224 static struct fd_routine_l {
225         int (*_request_dma)(unsigned int dmanr, const char * device_id);
226         void (*_free_dma)(unsigned int dmanr);
227         int (*_get_dma_residue)(unsigned int dummy);
228         unsigned long (*_dma_mem_alloc) (unsigned long size);
229         int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
230 } fd_routine[] = {
231         {
232                 request_dma,
233                 free_dma,
234                 get_dma_residue,
235                 dma_mem_alloc,
236                 hard_dma_setup
237         },
238         {
239                 vdma_request_dma,
240                 vdma_nop,
241                 vdma_get_dma_residue,
242                 vdma_mem_alloc,
243                 vdma_dma_setup
244         }
245 };
246
247
248 static int FDC1 = 0x3f0;
249 static int FDC2 = -1;
250
251 /*
252  * Floppy types are stored in the rtc's CMOS RAM and so rtc_lock
253  * is needed to prevent corrupted CMOS RAM in case "insmod floppy"
254  * coincides with another rtc CMOS user.                Paul G.
255  */
256 #define FLOPPY0_TYPE    ({                              \
257         unsigned long flags;                            \
258         unsigned char val;                              \
259         spin_lock_irqsave(&rtc_lock, flags);            \
260         val = (CMOS_READ(0x10) >> 4) & 15;              \
261         spin_unlock_irqrestore(&rtc_lock, flags);       \
262         val;                                            \
263 })
264
265 #define FLOPPY1_TYPE    ({                              \
266         unsigned long flags;                            \
267         unsigned char val;                              \
268         spin_lock_irqsave(&rtc_lock, flags);            \
269         val = CMOS_READ(0x10) & 15;                     \
270         spin_unlock_irqrestore(&rtc_lock, flags);       \
271         val;                                            \
272 })
273
274 #define N_FDC 2
275 #define N_DRIVE 8
276
277 #define FLOPPY_MOTOR_MASK 0xf0
278
279 #define AUTO_DMA
280
281 #define EXTRA_FLOPPY_PARAMS
282
283 #endif /* __ASM_X86_64_FLOPPY_H */