Loading...
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_ALPHA_FLOPPY_H
11#define __ASM_ALPHA_FLOPPY_H
12
13
14#define fd_inb(port) inb_p(port)
15#define fd_outb(value,port) outb_p(value,port)
16
17#define fd_enable_dma() enable_dma(FLOPPY_DMA)
18#define fd_disable_dma() disable_dma(FLOPPY_DMA)
19#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
20#define fd_free_dma() free_dma(FLOPPY_DMA)
21#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
22#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
23#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
24#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
25#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
26#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
27#define fd_cacheflush(addr,size) /* nothing */
28#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
29 IRQF_DISABLED, "floppy", NULL)
30#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
31
32#ifdef CONFIG_PCI
33
34#include <linux/pci.h>
35
36#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
37
38static __inline__ int
39alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
40{
41 static unsigned long prev_size;
42 static dma_addr_t bus_addr = 0;
43 static char *prev_addr;
44 static int prev_dir;
45 int dir;
46
47 dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
48
49 if (bus_addr
50 && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
51 /* different from last time -- unmap prev */
52 pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
53 bus_addr = 0;
54 }
55
56 if (!bus_addr) /* need to map it */
57 bus_addr = pci_map_single(isa_bridge, addr, size, dir);
58
59 /* remember this one as prev */
60 prev_addr = addr;
61 prev_size = size;
62 prev_dir = dir;
63
64 fd_clear_dma_ff();
65 fd_cacheflush(addr, size);
66 fd_set_dma_mode(mode);
67 set_dma_addr(FLOPPY_DMA, bus_addr);
68 fd_set_dma_count(size);
69 virtual_dma_port = io;
70 fd_enable_dma();
71
72 return 0;
73}
74
75#endif /* CONFIG_PCI */
76
77__inline__ void virtual_dma_init(void)
78{
79 /* Nothing to do on an Alpha */
80}
81
82static int FDC1 = 0x3f0;
83static int FDC2 = -1;
84
85/*
86 * Again, the CMOS information doesn't work on the alpha..
87 */
88#define FLOPPY0_TYPE 6
89#define FLOPPY1_TYPE 0
90
91#define N_FDC 2
92#define N_DRIVE 8
93
94/*
95 * Most Alphas have no problems with floppy DMA crossing 64k borders,
96 * except for certain ones, like XL and RUFFIAN.
97 *
98 * However, the test is simple and fast, and this *is* floppy, after all,
99 * so we do it for all platforms, just to make sure.
100 *
101 * This is advantageous in other circumstances as well, as in moving
102 * about the PCI DMA windows and forcing the floppy to start doing
103 * scatter-gather when it never had before, and there *is* a problem
104 * on that platform... ;-}
105 */
106
107static inline unsigned long CROSS_64KB(void *a, unsigned long s)
108{
109 unsigned long p = (unsigned long)a;
110 return ((p + s - 1) ^ p) & ~0xffffUL;
111}
112
113#define EXTRA_FLOPPY_PARAMS
114
115#endif /* __ASM_ALPHA_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_ALPHA_FLOPPY_H
11#define __ASM_ALPHA_FLOPPY_H
12
13
14#define fd_inb(port) inb_p(port)
15#define fd_outb(value,port) outb_p(value,port)
16
17#define fd_enable_dma() enable_dma(FLOPPY_DMA)
18#define fd_disable_dma() disable_dma(FLOPPY_DMA)
19#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
20#define fd_free_dma() free_dma(FLOPPY_DMA)
21#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
22#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
23#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
24#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
25#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
26#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
27#define fd_cacheflush(addr,size) /* nothing */
28#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
29 IRQF_DISABLED, "floppy", NULL)
30#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
31
32#ifdef CONFIG_PCI
33
34#include <linux/pci.h>
35
36#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
37
38static __inline__ int
39alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
40{
41 static unsigned long prev_size;
42 static dma_addr_t bus_addr = 0;
43 static char *prev_addr;
44 static int prev_dir;
45 int dir;
46
47 dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
48
49 if (bus_addr
50 && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
51 /* different from last time -- unmap prev */
52 pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
53 bus_addr = 0;
54 }
55
56 if (!bus_addr) /* need to map it */
57 bus_addr = pci_map_single(isa_bridge, addr, size, dir);
58
59 /* remember this one as prev */
60 prev_addr = addr;
61 prev_size = size;
62 prev_dir = dir;
63
64 fd_clear_dma_ff();
65 fd_cacheflush(addr, size);
66 fd_set_dma_mode(mode);
67 set_dma_addr(FLOPPY_DMA, bus_addr);
68 fd_set_dma_count(size);
69 virtual_dma_port = io;
70 fd_enable_dma();
71
72 return 0;
73}
74
75#endif /* CONFIG_PCI */
76
77__inline__ void virtual_dma_init(void)
78{
79 /* Nothing to do on an Alpha */
80}
81
82static int FDC1 = 0x3f0;
83static int FDC2 = -1;
84
85/*
86 * Again, the CMOS information doesn't work on the alpha..
87 */
88#define FLOPPY0_TYPE 6
89#define FLOPPY1_TYPE 0
90
91#define N_FDC 2
92#define N_DRIVE 8
93
94/*
95 * Most Alphas have no problems with floppy DMA crossing 64k borders,
96 * except for certain ones, like XL and RUFFIAN.
97 *
98 * However, the test is simple and fast, and this *is* floppy, after all,
99 * so we do it for all platforms, just to make sure.
100 *
101 * This is advantageous in other circumstances as well, as in moving
102 * about the PCI DMA windows and forcing the floppy to start doing
103 * scatter-gather when it never had before, and there *is* a problem
104 * on that platform... ;-}
105 */
106
107static inline unsigned long CROSS_64KB(void *a, unsigned long s)
108{
109 unsigned long p = (unsigned long)a;
110 return ((p + s - 1) ^ p) & ~0xffffUL;
111}
112
113#define EXTRA_FLOPPY_PARAMS
114
115#endif /* __ASM_ALPHA_FLOPPY_H */