1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Architecture specific parts of the Floppy driver
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
5*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
6*4882a593Smuzhiyun * for more details.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (C) 1995
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun #ifndef __ASM_ALPHA_FLOPPY_H
11*4882a593Smuzhiyun #define __ASM_ALPHA_FLOPPY_H
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #define fd_inb(base, reg) inb_p((base) + (reg))
15*4882a593Smuzhiyun #define fd_outb(value, base, reg) outb_p(value, (base) + (reg))
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #define fd_enable_dma() enable_dma(FLOPPY_DMA)
18*4882a593Smuzhiyun #define fd_disable_dma() disable_dma(FLOPPY_DMA)
19*4882a593Smuzhiyun #define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
20*4882a593Smuzhiyun #define fd_free_dma() free_dma(FLOPPY_DMA)
21*4882a593Smuzhiyun #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
22*4882a593Smuzhiyun #define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
23*4882a593Smuzhiyun #define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
24*4882a593Smuzhiyun #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
25*4882a593Smuzhiyun #define fd_enable_irq() enable_irq(FLOPPY_IRQ)
26*4882a593Smuzhiyun #define fd_disable_irq() disable_irq(FLOPPY_IRQ)
27*4882a593Smuzhiyun #define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
28*4882a593Smuzhiyun 0, "floppy", NULL)
29*4882a593Smuzhiyun #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #ifdef CONFIG_PCI
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #include <linux/pci.h>
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun static __inline__ int
alpha_fd_dma_setup(char * addr,unsigned long size,int mode,int io)38*4882a593Smuzhiyun alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun static unsigned long prev_size;
41*4882a593Smuzhiyun static dma_addr_t bus_addr = 0;
42*4882a593Smuzhiyun static char *prev_addr;
43*4882a593Smuzhiyun static int prev_dir;
44*4882a593Smuzhiyun int dir;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (bus_addr
49*4882a593Smuzhiyun && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
50*4882a593Smuzhiyun /* different from last time -- unmap prev */
51*4882a593Smuzhiyun pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
52*4882a593Smuzhiyun bus_addr = 0;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun if (!bus_addr) /* need to map it */
56*4882a593Smuzhiyun bus_addr = pci_map_single(isa_bridge, addr, size, dir);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun /* remember this one as prev */
59*4882a593Smuzhiyun prev_addr = addr;
60*4882a593Smuzhiyun prev_size = size;
61*4882a593Smuzhiyun prev_dir = dir;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun fd_clear_dma_ff();
64*4882a593Smuzhiyun fd_set_dma_mode(mode);
65*4882a593Smuzhiyun set_dma_addr(FLOPPY_DMA, bus_addr);
66*4882a593Smuzhiyun fd_set_dma_count(size);
67*4882a593Smuzhiyun virtual_dma_port = io;
68*4882a593Smuzhiyun fd_enable_dma();
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun #endif /* CONFIG_PCI */
74*4882a593Smuzhiyun
virtual_dma_init(void)75*4882a593Smuzhiyun __inline__ void virtual_dma_init(void)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun /* Nothing to do on an Alpha */
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun static int FDC1 = 0x3f0;
81*4882a593Smuzhiyun static int FDC2 = -1;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun /*
84*4882a593Smuzhiyun * Again, the CMOS information doesn't work on the alpha..
85*4882a593Smuzhiyun */
86*4882a593Smuzhiyun #define FLOPPY0_TYPE 6
87*4882a593Smuzhiyun #define FLOPPY1_TYPE 0
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun #define N_FDC 2
90*4882a593Smuzhiyun #define N_DRIVE 8
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun /*
93*4882a593Smuzhiyun * Most Alphas have no problems with floppy DMA crossing 64k borders,
94*4882a593Smuzhiyun * except for certain ones, like XL and RUFFIAN.
95*4882a593Smuzhiyun *
96*4882a593Smuzhiyun * However, the test is simple and fast, and this *is* floppy, after all,
97*4882a593Smuzhiyun * so we do it for all platforms, just to make sure.
98*4882a593Smuzhiyun *
99*4882a593Smuzhiyun * This is advantageous in other circumstances as well, as in moving
100*4882a593Smuzhiyun * about the PCI DMA windows and forcing the floppy to start doing
101*4882a593Smuzhiyun * scatter-gather when it never had before, and there *is* a problem
102*4882a593Smuzhiyun * on that platform... ;-}
103*4882a593Smuzhiyun */
104*4882a593Smuzhiyun
CROSS_64KB(void * a,unsigned long s)105*4882a593Smuzhiyun static inline unsigned long CROSS_64KB(void *a, unsigned long s)
106*4882a593Smuzhiyun {
107*4882a593Smuzhiyun unsigned long p = (unsigned long)a;
108*4882a593Smuzhiyun return ((p + s - 1) ^ p) & ~0xffffUL;
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun #define EXTRA_FLOPPY_PARAMS
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun #endif /* __ASM_ALPHA_FLOPPY_H */
114