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(base, reg) inb_p((base) + (reg)) 15 #define fd_outb(value, base, reg) outb_p(value, (base) + (reg)) 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) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 47 48 if (bus_addr 49 && (addr != prev_addr || size != prev_size || dir != prev_dir)) { 50 /* different from last time -- unmap prev */ 51 dma_unmap_single(&isa_bridge->dev, bus_addr, prev_size, 52 prev_dir); 53 bus_addr = 0; 54 } 55 56 if (!bus_addr) /* need to map it */ 57 bus_addr = dma_map_single(&isa_bridge->dev, 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_set_dma_mode(mode); 66 set_dma_addr(FLOPPY_DMA, bus_addr); 67 fd_set_dma_count(size); 68 virtual_dma_port = io; 69 fd_enable_dma(); 70 71 return 0; 72 } 73 74 #endif /* CONFIG_PCI */ 75 76 __inline__ void virtual_dma_init(void) 77 { 78 /* Nothing to do on an Alpha */ 79 } 80 81 static int FDC1 = 0x3f0; 82 static int FDC2 = -1; 83 84 /* 85 * Again, the CMOS information doesn't work on the alpha.. 86 */ 87 #define FLOPPY0_TYPE 6 88 #define FLOPPY1_TYPE 0 89 90 #define N_FDC 2 91 #define N_DRIVE 8 92 93 /* 94 * Most Alphas have no problems with floppy DMA crossing 64k borders, 95 * except for certain ones, like XL and RUFFIAN. 96 * 97 * However, the test is simple and fast, and this *is* floppy, after all, 98 * so we do it for all platforms, just to make sure. 99 * 100 * This is advantageous in other circumstances as well, as in moving 101 * about the PCI DMA windows and forcing the floppy to start doing 102 * scatter-gather when it never had before, and there *is* a problem 103 * on that platform... ;-} 104 */ 105 106 static inline unsigned long CROSS_64KB(void *a, unsigned long s) 107 { 108 unsigned long p = (unsigned long)a; 109 return ((p + s - 1) ^ p) & ~0xffffUL; 110 } 111 112 #define EXTRA_FLOPPY_PARAMS 113 114 #endif /* __ASM_ALPHA_FLOPPY_H */ 115