projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | */ | |
| 10 | #ifndef __ASM_ALPHA_FLOPPY_H | |
| 11 | #define __ASM_ALPHA_FLOPPY_H | |
| 12 | ||
| 1da177e4 LT |
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 */ | |
| afedfd01 | 28 | #define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\ |
| d18ecedc | 29 | IRQF_DISABLED, "floppy", NULL) |
| 1da177e4 LT |
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 | ||
| 38 | static __inline__ int | |
| 39 | alpha_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 | ||
| 82 | static int FDC1 = 0x3f0; | |
| 83 | static 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 | ||
| 1da177e4 LT |
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 | ||
| 107 | static 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 */ |