include/asm-x86/thread_info_64.h: checkpatch cleanups - formatting only
[linux-2.6] / include / asm-powerpc / floppy.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_POWERPC_FLOPPY_H
11 #define __ASM_POWERPC_FLOPPY_H
12 #ifdef __KERNEL__
13
14 #include <asm/machdep.h>
15
16 #define fd_inb(port)            inb_p(port)
17 #define fd_outb(value,port)     outb_p(value,port)
18
19 #define fd_enable_dma()         enable_dma(FLOPPY_DMA)
20 #define fd_disable_dma()         fd_ops->_disable_dma(FLOPPY_DMA)
21 #define fd_free_dma()           fd_ops->_free_dma(FLOPPY_DMA)
22 #define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
23 #define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA, mode)
24 #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
25 #define fd_get_dma_residue()    fd_ops->_get_dma_residue(FLOPPY_DMA)
26 #define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
27 #define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
28 #define fd_cacheflush(addr,size) /* nothing */
29 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
30
31 #include <linux/pci.h>
32 #include <asm/ppc-pci.h>        /* for isa_bridge_pcidev */
33
34 #define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io)
35
36 static int fd_request_dma(void);
37
38 struct fd_dma_ops {
39         void (*_disable_dma)(unsigned int dmanr);
40         void (*_free_dma)(unsigned int dmanr);
41         int (*_get_dma_residue)(unsigned int dummy);
42         int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
43 };
44
45 static int virtual_dma_count;
46 static int virtual_dma_residue;
47 static char *virtual_dma_addr;
48 static int virtual_dma_mode;
49 static int doing_vdma;
50 static struct fd_dma_ops *fd_ops;
51
52 static irqreturn_t floppy_hardint(int irq, void *dev_id)
53 {
54         unsigned char st;
55         int lcount;
56         char *lptr;
57
58         if (!doing_vdma)
59                 return floppy_interrupt(irq, dev_id);
60
61
62         st = 1;
63         for (lcount=virtual_dma_count, lptr=virtual_dma_addr;
64              lcount; lcount--, lptr++) {
65                 st=inb(virtual_dma_port+4) & 0xa0 ;
66                 if (st != 0xa0)
67                         break;
68                 if (virtual_dma_mode)
69                         outb_p(*lptr, virtual_dma_port+5);
70                 else
71                         *lptr = inb_p(virtual_dma_port+5);
72         }
73         virtual_dma_count = lcount;
74         virtual_dma_addr = lptr;
75         st = inb(virtual_dma_port+4);
76
77         if (st == 0x20)
78                 return IRQ_HANDLED;
79         if (!(st & 0x20)) {
80                 virtual_dma_residue += virtual_dma_count;
81                 virtual_dma_count=0;
82                 doing_vdma = 0;
83                 floppy_interrupt(irq, dev_id);
84                 return IRQ_HANDLED;
85         }
86         return IRQ_HANDLED;
87 }
88
89 static void vdma_disable_dma(unsigned int dummy)
90 {
91         doing_vdma = 0;
92         virtual_dma_residue += virtual_dma_count;
93         virtual_dma_count=0;
94 }
95
96 static void vdma_nop(unsigned int dummy)
97 {
98 }
99
100
101 static int vdma_get_dma_residue(unsigned int dummy)
102 {
103         return virtual_dma_count + virtual_dma_residue;
104 }
105
106
107 static int fd_request_irq(void)
108 {
109         if (can_use_virtual_dma)
110                 return request_irq(FLOPPY_IRQ, floppy_hardint,
111                                    IRQF_DISABLED, "floppy", NULL);
112         else
113                 return request_irq(FLOPPY_IRQ, floppy_interrupt,
114                                    IRQF_DISABLED, "floppy", NULL);
115 }
116
117 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
118 {
119         doing_vdma = 1;
120         virtual_dma_port = io;
121         virtual_dma_mode = (mode  == DMA_MODE_WRITE);
122         virtual_dma_addr = addr;
123         virtual_dma_count = size;
124         virtual_dma_residue = 0;
125         return 0;
126 }
127
128 static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
129 {
130         static unsigned long prev_size;
131         static dma_addr_t bus_addr = 0;
132         static char *prev_addr;
133         static int prev_dir;
134         int dir;
135
136         doing_vdma = 0;
137         dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
138
139         if (bus_addr 
140             && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
141                 /* different from last time -- unmap prev */
142                 pci_unmap_single(isa_bridge_pcidev, bus_addr, prev_size, prev_dir);
143                 bus_addr = 0;
144         }
145
146         if (!bus_addr)  /* need to map it */
147                 bus_addr = pci_map_single(isa_bridge_pcidev, addr, size, dir);
148
149         /* remember this one as prev */
150         prev_addr = addr;
151         prev_size = size;
152         prev_dir = dir;
153
154         fd_clear_dma_ff();
155         fd_cacheflush(addr, size);
156         fd_set_dma_mode(mode);
157         set_dma_addr(FLOPPY_DMA, bus_addr);
158         fd_set_dma_count(size);
159         virtual_dma_port = io;
160         fd_enable_dma();
161
162         return 0;
163 }
164
165 static struct fd_dma_ops real_dma_ops =
166 {
167         ._disable_dma = disable_dma,
168         ._free_dma = free_dma,
169         ._get_dma_residue = get_dma_residue,
170         ._dma_setup = hard_dma_setup
171 };
172
173 static struct fd_dma_ops virt_dma_ops =
174 {
175         ._disable_dma = vdma_disable_dma,
176         ._free_dma = vdma_nop,
177         ._get_dma_residue = vdma_get_dma_residue,
178         ._dma_setup = vdma_dma_setup
179 };
180
181 static int fd_request_dma(void)
182 {
183         if (can_use_virtual_dma & 1) {
184                 fd_ops = &virt_dma_ops;
185                 return 0;
186         }
187         else {
188                 fd_ops = &real_dma_ops;
189                 return request_dma(FLOPPY_DMA, "floppy");
190         }
191 }
192
193 static int FDC1 = 0x3f0;
194 static int FDC2 = -1;
195
196 /*
197  * Again, the CMOS information not available
198  */
199 #define FLOPPY0_TYPE 6
200 #define FLOPPY1_TYPE 0
201
202 #define N_FDC 2                 /* Don't change this! */
203 #define N_DRIVE 8
204
205 /*
206  * The PowerPC has no problems with floppy DMA crossing 64k borders.
207  */
208 #define CROSS_64KB(a,s) (0)
209
210 #define EXTRA_FLOPPY_PARAMS
211
212 #endif /* __KERNEL__ */
213 #endif /* __ASM_POWERPC_FLOPPY_H */