2 * Architecture specific parts of the Floppy driver
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
10 #ifndef __ASM_ALPHA_FLOPPY_H
11 #define __ASM_ALPHA_FLOPPY_H
14 #define fd_inb(port) inb_p(port)
15 #define fd_outb(value,port) outb_p(value,port)
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);
34 #include <linux/pci.h>
36 #define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
39 alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
41 static unsigned long prev_size;
42 static dma_addr_t bus_addr = 0;
43 static char *prev_addr;
47 dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
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);
56 if (!bus_addr) /* need to map it */
57 bus_addr = pci_map_single(isa_bridge, addr, size, dir);
59 /* remember this one as prev */
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;
75 #endif /* CONFIG_PCI */
77 __inline__ void virtual_dma_init(void)
79 /* Nothing to do on an Alpha */
82 static int FDC1 = 0x3f0;
86 * Again, the CMOS information doesn't work on the alpha..
88 #define FLOPPY0_TYPE 6
89 #define FLOPPY1_TYPE 0
94 #define FLOPPY_MOTOR_MASK 0xf0
97 * Most Alphas have no problems with floppy DMA crossing 64k borders,
98 * except for certain ones, like XL and RUFFIAN.
100 * However, the test is simple and fast, and this *is* floppy, after all,
101 * so we do it for all platforms, just to make sure.
103 * This is advantageous in other circumstances as well, as in moving
104 * about the PCI DMA windows and forcing the floppy to start doing
105 * scatter-gather when it never had before, and there *is* a problem
106 * on that platform... ;-}
109 static inline unsigned long CROSS_64KB(void *a, unsigned long s)
111 unsigned long p = (unsigned long)a;
112 return ((p + s - 1) ^ p) & ~0xffffUL;
115 #define EXTRA_FLOPPY_PARAMS
117 #endif /* __ASM_ALPHA_FLOPPY_H */