Commit | Line | Data |
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1da177e4 LT |
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 | */ | |
c55377ee PM |
10 | #ifndef __ASM_POWERPC_FLOPPY_H |
11 | #define __ASM_POWERPC_FLOPPY_H | |
88ced031 | 12 | #ifdef __KERNEL__ |
1da177e4 | 13 | |
1da177e4 LT |
14 | #include <asm/machdep.h> |
15 | ||
c55377ee PM |
16 | #define fd_inb(port) inb_p(port) |
17 | #define fd_outb(value,port) outb_p(value,port) | |
1da177e4 LT |
18 | |
19 | #define fd_enable_dma() enable_dma(FLOPPY_DMA) | |
9ea8b7c9 PF |
20 | #define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA) |
21 | #define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA) | |
1da177e4 | 22 | #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA) |
c55377ee PM |
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) | |
9ea8b7c9 | 25 | #define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA) |
1da177e4 LT |
26 | #define fd_enable_irq() enable_irq(FLOPPY_IRQ) |
27 | #define fd_disable_irq() disable_irq(FLOPPY_IRQ) | |
1da177e4 LT |
28 | #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL); |
29 | ||
1da177e4 | 30 | #include <linux/pci.h> |
3d5134ee | 31 | #include <asm/ppc-pci.h> /* for isa_bridge_pcidev */ |
1da177e4 | 32 | |
9ea8b7c9 PF |
33 | #define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io) |
34 | ||
35 | static int fd_request_dma(void); | |
36 | ||
37 | struct fd_dma_ops { | |
38 | void (*_disable_dma)(unsigned int dmanr); | |
39 | void (*_free_dma)(unsigned int dmanr); | |
40 | int (*_get_dma_residue)(unsigned int dummy); | |
41 | int (*_dma_setup)(char *addr, unsigned long size, int mode, int io); | |
42 | }; | |
43 | ||
44 | static int virtual_dma_count; | |
45 | static int virtual_dma_residue; | |
46 | static char *virtual_dma_addr; | |
47 | static int virtual_dma_mode; | |
48 | static int doing_vdma; | |
49 | static struct fd_dma_ops *fd_ops; | |
50 | ||
51 | static irqreturn_t floppy_hardint(int irq, void *dev_id) | |
52 | { | |
53 | unsigned char st; | |
54 | int lcount; | |
55 | char *lptr; | |
56 | ||
57 | if (!doing_vdma) | |
58 | return floppy_interrupt(irq, dev_id); | |
59 | ||
60 | ||
61 | st = 1; | |
62 | for (lcount=virtual_dma_count, lptr=virtual_dma_addr; | |
63 | lcount; lcount--, lptr++) { | |
64 | st=inb(virtual_dma_port+4) & 0xa0 ; | |
65 | if (st != 0xa0) | |
66 | break; | |
67 | if (virtual_dma_mode) | |
68 | outb_p(*lptr, virtual_dma_port+5); | |
69 | else | |
70 | *lptr = inb_p(virtual_dma_port+5); | |
71 | } | |
72 | virtual_dma_count = lcount; | |
73 | virtual_dma_addr = lptr; | |
74 | st = inb(virtual_dma_port+4); | |
75 | ||
76 | if (st == 0x20) | |
77 | return IRQ_HANDLED; | |
78 | if (!(st & 0x20)) { | |
79 | virtual_dma_residue += virtual_dma_count; | |
80 | virtual_dma_count=0; | |
81 | doing_vdma = 0; | |
82 | floppy_interrupt(irq, dev_id); | |
83 | return IRQ_HANDLED; | |
84 | } | |
85 | return IRQ_HANDLED; | |
86 | } | |
1da177e4 | 87 | |
9ea8b7c9 PF |
88 | static void vdma_disable_dma(unsigned int dummy) |
89 | { | |
90 | doing_vdma = 0; | |
91 | virtual_dma_residue += virtual_dma_count; | |
92 | virtual_dma_count=0; | |
93 | } | |
94 | ||
95 | static void vdma_nop(unsigned int dummy) | |
96 | { | |
97 | } | |
98 | ||
99 | ||
100 | static int vdma_get_dma_residue(unsigned int dummy) | |
101 | { | |
102 | return virtual_dma_count + virtual_dma_residue; | |
103 | } | |
104 | ||
105 | ||
106 | static int fd_request_irq(void) | |
107 | { | |
108 | if (can_use_virtual_dma) | |
109 | return request_irq(FLOPPY_IRQ, floppy_hardint, | |
a3a9f3b4 | 110 | 0, "floppy", NULL); |
9ea8b7c9 PF |
111 | else |
112 | return request_irq(FLOPPY_IRQ, floppy_interrupt, | |
a3a9f3b4 | 113 | 0, "floppy", NULL); |
9ea8b7c9 PF |
114 | } |
115 | ||
116 | static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io) | |
117 | { | |
118 | doing_vdma = 1; | |
119 | virtual_dma_port = io; | |
120 | virtual_dma_mode = (mode == DMA_MODE_WRITE); | |
121 | virtual_dma_addr = addr; | |
122 | virtual_dma_count = size; | |
123 | virtual_dma_residue = 0; | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int hard_dma_setup(char *addr, unsigned long size, int mode, int io) | |
1da177e4 LT |
128 | { |
129 | static unsigned long prev_size; | |
130 | static dma_addr_t bus_addr = 0; | |
131 | static char *prev_addr; | |
132 | static int prev_dir; | |
133 | int dir; | |
134 | ||
9ea8b7c9 | 135 | doing_vdma = 0; |
1da177e4 LT |
136 | dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE; |
137 | ||
138 | if (bus_addr | |
139 | && (addr != prev_addr || size != prev_size || dir != prev_dir)) { | |
140 | /* different from last time -- unmap prev */ | |
3d5134ee | 141 | pci_unmap_single(isa_bridge_pcidev, bus_addr, prev_size, prev_dir); |
1da177e4 LT |
142 | bus_addr = 0; |
143 | } | |
144 | ||
c55377ee | 145 | if (!bus_addr) /* need to map it */ |
3d5134ee | 146 | bus_addr = pci_map_single(isa_bridge_pcidev, addr, size, dir); |
1da177e4 LT |
147 | |
148 | /* remember this one as prev */ | |
149 | prev_addr = addr; | |
150 | prev_size = size; | |
151 | prev_dir = dir; | |
152 | ||
153 | fd_clear_dma_ff(); | |
1da177e4 LT |
154 | fd_set_dma_mode(mode); |
155 | set_dma_addr(FLOPPY_DMA, bus_addr); | |
156 | fd_set_dma_count(size); | |
157 | virtual_dma_port = io; | |
158 | fd_enable_dma(); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
9ea8b7c9 PF |
163 | static struct fd_dma_ops real_dma_ops = |
164 | { | |
165 | ._disable_dma = disable_dma, | |
166 | ._free_dma = free_dma, | |
167 | ._get_dma_residue = get_dma_residue, | |
168 | ._dma_setup = hard_dma_setup | |
169 | }; | |
170 | ||
171 | static struct fd_dma_ops virt_dma_ops = | |
172 | { | |
173 | ._disable_dma = vdma_disable_dma, | |
174 | ._free_dma = vdma_nop, | |
175 | ._get_dma_residue = vdma_get_dma_residue, | |
176 | ._dma_setup = vdma_dma_setup | |
177 | }; | |
1da177e4 | 178 | |
1be9ab05 | 179 | static int fd_request_dma(void) |
1da177e4 | 180 | { |
9ea8b7c9 PF |
181 | if (can_use_virtual_dma & 1) { |
182 | fd_ops = &virt_dma_ops; | |
183 | return 0; | |
184 | } | |
185 | else { | |
186 | fd_ops = &real_dma_ops; | |
187 | return request_dma(FLOPPY_DMA, "floppy"); | |
188 | } | |
1da177e4 LT |
189 | } |
190 | ||
191 | static int FDC1 = 0x3f0; | |
192 | static int FDC2 = -1; | |
193 | ||
194 | /* | |
195 | * Again, the CMOS information not available | |
196 | */ | |
197 | #define FLOPPY0_TYPE 6 | |
198 | #define FLOPPY1_TYPE 0 | |
199 | ||
200 | #define N_FDC 2 /* Don't change this! */ | |
201 | #define N_DRIVE 8 | |
202 | ||
1da177e4 LT |
203 | /* |
204 | * The PowerPC has no problems with floppy DMA crossing 64k borders. | |
205 | */ | |
206 | #define CROSS_64KB(a,s) (0) | |
207 | ||
208 | #define EXTRA_FLOPPY_PARAMS | |
209 | ||
88ced031 | 210 | #endif /* __KERNEL__ */ |
c55377ee | 211 | #endif /* __ASM_POWERPC_FLOPPY_H */ |