floppy.h
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上传日期:2013-04-10
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- /*
- * Architecture specific parts of the Floppy driver
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995
- */
- #ifndef __ASM_ALPHA_FLOPPY_H
- #define __ASM_ALPHA_FLOPPY_H
- #include <linux/config.h>
- #define fd_inb(port) inb_p(port)
- #define fd_outb(port,value) outb_p(port,value)
- #define fd_enable_dma() enable_dma(FLOPPY_DMA)
- #define fd_disable_dma() disable_dma(FLOPPY_DMA)
- #define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
- #define fd_free_dma() free_dma(FLOPPY_DMA)
- #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
- #define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
- #define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
- #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
- #define fd_enable_irq() enable_irq(FLOPPY_IRQ)
- #define fd_disable_irq() disable_irq(FLOPPY_IRQ)
- #define fd_cacheflush(addr,size) /* nothing */
- #define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,
- SA_INTERRUPT|SA_SAMPLE_RANDOM,
- "floppy", NULL)
- #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
- #ifdef CONFIG_PCI
- #include <linux/pci.h>
- #define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
- static __inline__ int
- alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
- {
- static unsigned long prev_size;
- static dma_addr_t bus_addr = 0;
- static char *prev_addr;
- static int prev_dir;
- int dir;
- dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
- if (bus_addr
- && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
- /* different from last time -- unmap prev */
- pci_unmap_single(NULL, bus_addr, prev_size, prev_dir);
- bus_addr = 0;
- }
- if (!bus_addr) /* need to map it */
- bus_addr = pci_map_single(NULL, addr, size, dir);
- /* remember this one as prev */
- prev_addr = addr;
- prev_size = size;
- prev_dir = dir;
- fd_clear_dma_ff();
- fd_cacheflush(addr, size);
- fd_set_dma_mode(mode);
- set_dma_addr(FLOPPY_DMA, bus_addr);
- fd_set_dma_count(size);
- virtual_dma_port = io;
- fd_enable_dma();
- return 0;
- }
- #endif /* CONFIG_PCI */
- static int FDC1 = 0x3f0;
- static int FDC2 = -1;
- /*
- * Again, the CMOS information doesn't work on the alpha..
- */
- #define FLOPPY0_TYPE 6
- #define FLOPPY1_TYPE 0
- #define N_FDC 2
- #define N_DRIVE 8
- #define FLOPPY_MOTOR_MASK 0xf0
- /*
- * Most Alphas have no problems with floppy DMA crossing 64k borders,
- * except for XL and RUFFIAN. They are also the only one with DMA
- * limits, so we use that to test in the generic kernel.
- */
- #define __CROSS_64KB(a,s)
- ({ unsigned long __s64 = (unsigned long)(a);
- unsigned long __e64 = __s64 + (unsigned long)(s) - 1;
- (__s64 ^ __e64) & ~0xfffful; })
- #ifdef CONFIG_ALPHA_GENERIC
- # define CROSS_64KB(a,s) (__CROSS_64KB(a,s) && ~alpha_mv.max_dma_address)
- #else
- # if defined(CONFIG_ALPHA_XL) || defined(CONFIG_ALPHA_RUFFIAN) || defined(CONFIG_ALPHA_NAUTILUS)
- # define CROSS_64KB(a,s) __CROSS_64KB(a,s)
- # else
- # define CROSS_64KB(a,s) (0)
- # endif
- #endif
- #define EXTRA_FLOPPY_PARAMS
- #endif /* __ASM_ALPHA_FLOPPY_H */