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