1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * arch/arm/include/asm/floppy.h 4 * 5 * Copyright (C) 1996-2000 Russell King 6 * 7 * Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here 8 */ 9 #ifndef __ASM_ARM_FLOPPY_H 10 #define __ASM_ARM_FLOPPY_H 11 #if 0 12 #include <mach/floppy.h> 13 #endif 14 15 #define fd_outb(val,port) \ 16 do { \ 17 if ((port) == (u32)FD_DOR) \ 18 fd_setdor((val)); \ 19 else \ 20 outb((val),(port)); \ 21 } while(0) 22 23 #define fd_inb(port) inb((port)) 24 #define fd_request_irq() request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\ 25 0,"floppy",NULL) 26 #define fd_free_irq() free_irq(IRQ_FLOPPYDISK,NULL) 27 #define fd_disable_irq() disable_irq(IRQ_FLOPPYDISK) 28 #define fd_enable_irq() enable_irq(IRQ_FLOPPYDISK) 29 30 static inline int fd_dma_setup(void *data, unsigned int length, 31 unsigned int mode, unsigned long addr) 32 { 33 set_dma_mode(DMA_FLOPPY, mode); 34 __set_dma_addr(DMA_FLOPPY, data); 35 set_dma_count(DMA_FLOPPY, length); 36 virtual_dma_port = addr; 37 enable_dma(DMA_FLOPPY); 38 return 0; 39 } 40 #define fd_dma_setup fd_dma_setup 41 42 #define fd_request_dma() request_dma(DMA_FLOPPY,"floppy") 43 #define fd_free_dma() free_dma(DMA_FLOPPY) 44 #define fd_disable_dma() disable_dma(DMA_FLOPPY) 45 46 /* need to clean up dma.h */ 47 #define DMA_FLOPPYDISK DMA_FLOPPY 48 49 /* Floppy_selects is the list of DOR's to select drive fd 50 * 51 * On initialisation, the floppy list is scanned, and the drives allocated 52 * in the order that they are found. This is done by seeking the drive 53 * to a non-zero track, and then restoring it to track 0. If an error occurs, 54 * then there is no floppy drive present. [to be put back in again] 55 */ 56 static unsigned char floppy_selects[2][4] = 57 { 58 { 0x10, 0x21, 0x23, 0x33 }, 59 { 0x10, 0x21, 0x23, 0x33 } 60 }; 61 62 #define fd_setdor(dor) \ 63 do { \ 64 int new_dor = (dor); \ 65 if (new_dor & 0xf0) \ 66 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \ 67 else \ 68 new_dor &= 0x0c; \ 69 outb(new_dor, FD_DOR); \ 70 } while (0) 71 72 /* 73 * Someday, we'll automatically detect which drives are present... 74 */ 75 static inline void fd_scandrives (void) 76 { 77 #if 0 78 int floppy, drive_count; 79 80 fd_disable_irq(); 81 raw_cmd = &default_raw_cmd; 82 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK; 83 raw_cmd->track = 0; 84 raw_cmd->rate = ?; 85 drive_count = 0; 86 for (floppy = 0; floppy < 4; floppy ++) { 87 current_drive = drive_count; 88 /* 89 * Turn on floppy motor 90 */ 91 if (start_motor(redo_fd_request)) 92 continue; 93 /* 94 * Set up FDC 95 */ 96 fdc_specify(); 97 /* 98 * Tell FDC to recalibrate 99 */ 100 output_byte(FD_RECALIBRATE); 101 LAST_OUT(UNIT(floppy)); 102 /* wait for command to complete */ 103 if (!successful) { 104 int i; 105 for (i = drive_count; i < 3; i--) 106 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1]; 107 floppy_selects[fdc][3] = 0; 108 floppy -= 1; 109 } else 110 drive_count++; 111 } 112 #else 113 floppy_selects[0][0] = 0x10; 114 floppy_selects[0][1] = 0x21; 115 floppy_selects[0][2] = 0x23; 116 floppy_selects[0][3] = 0x33; 117 #endif 118 } 119 120 #define FDC1 (0x3f0) 121 122 #define FLOPPY0_TYPE 4 123 #define FLOPPY1_TYPE 4 124 125 #define N_FDC 1 126 #define N_DRIVE 4 127 128 #define CROSS_64KB(a,s) (0) 129 130 /* 131 * This allows people to reverse the order of 132 * fd0 and fd1, in case their hardware is 133 * strangely connected (as some RiscPCs 134 * and A5000s seem to be). 135 */ 136 static void driveswap(int *ints, int dummy, int dummy2) 137 { 138 floppy_selects[0][0] ^= floppy_selects[0][1]; 139 floppy_selects[0][1] ^= floppy_selects[0][0]; 140 floppy_selects[0][0] ^= floppy_selects[0][1]; 141 } 142 143 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 } 144 145 #endif 146