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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 | /* SPDX-License-Identifier: GPL-2.0 */ /* sun3xflop.h: Sun3/80 specific parts of the floppy driver. * * Derived partially from asm-sparc/floppy.h, which is: * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) * * Sun3x version 2/4/2000 Sam Creasey (sammy@sammy.net) */ #ifndef __ASM_SUN3X_FLOPPY_H #define __ASM_SUN3X_FLOPPY_H #include <linux/pgtable.h> #include <asm/page.h> #include <asm/irq.h> #include <asm/sun3x.h> /* default interrupt vector */ #define SUN3X_FDC_IRQ 0x40 /* some constants */ #define FCR_TC 0x1 #define FCR_EJECT 0x2 #define FCR_MTRON 0x4 #define FCR_DSEL1 0x8 #define FCR_DSEL0 0x10 /* We don't need no stinkin' I/O port allocation crap. */ #undef release_region #undef request_region #define release_region(X, Y) do { } while(0) #define request_region(X, Y, Z) (1) struct sun3xflop_private { volatile unsigned char *status_r; volatile unsigned char *data_r; volatile unsigned char *fcr_r; volatile unsigned char *fvr_r; unsigned char fcr; } sun3x_fdc; /* Super paranoid... */ #undef HAVE_DISABLE_HLT /* Routines unique to each controller type on a Sun. */ static unsigned char sun3x_82072_fd_inb(int port) { static int once = 0; // udelay(5); switch(port & 7) { default: pr_crit("floppy: Asked to read unknown port %d\n", port); panic("floppy: Port bolixed."); case 4: /* FD_STATUS */ return (*sun3x_fdc.status_r) & ~STATUS_DMA; case 5: /* FD_DATA */ return (*sun3x_fdc.data_r); case 7: /* FD_DIR */ /* ugly hack, I can't find a way to actually detect the disk */ if(!once) { once = 1; return 0x80; } return 0; }; panic("sun_82072_fd_inb: How did I get here?"); } static void sun3x_82072_fd_outb(unsigned char value, int port) { // udelay(5); switch(port & 7) { default: pr_crit("floppy: Asked to write to unknown port %d\n", port); panic("floppy: Port bolixed."); case 2: /* FD_DOR */ /* Oh geese, 82072 on the Sun has no DOR register, * so we make do with taunting the FCR. * * ASSUMPTIONS: There will only ever be one floppy * drive attached to a Sun controller * and it will be at drive zero. */ { unsigned char fcr = sun3x_fdc.fcr; if(value & 0x10) { fcr |= (FCR_DSEL0 | FCR_MTRON); } else fcr &= ~(FCR_DSEL0 | FCR_MTRON); if(fcr != sun3x_fdc.fcr) { *(sun3x_fdc.fcr_r) = fcr; sun3x_fdc.fcr = fcr; } } break; case 5: /* FD_DATA */ *(sun3x_fdc.data_r) = value; break; case 7: /* FD_DCR */ *(sun3x_fdc.status_r) = value; break; case 4: /* FD_STATUS */ *(sun3x_fdc.status_r) = value; break; } return; } asmlinkage irqreturn_t sun3xflop_hardint(int irq, void *dev_id) { register unsigned char st; #undef TRACE_FLPY_INT #define NO_FLOPPY_ASSEMBLER #ifdef TRACE_FLPY_INT static int calls=0; static int bytes=0; static int dma_wait=0; #endif if(!doing_pdma) { floppy_interrupt(irq, dev_id); return IRQ_HANDLED; } // pr_info("doing pdma\n");// st %x\n", sun_fdc->status_82072); #ifdef TRACE_FLPY_INT if(!calls) bytes = virtual_dma_count; #endif { register int lcount; register char *lptr; for(lcount=virtual_dma_count, lptr=virtual_dma_addr; lcount; lcount--, lptr++) { /* st=fd_inb(virtual_dma_port+4) & 0x80 ; */ st = *(sun3x_fdc.status_r); /* if(st != 0xa0) */ /* break; */ if((st & 0x80) == 0) { virtual_dma_count = lcount; virtual_dma_addr = lptr; return IRQ_HANDLED; } if((st & 0x20) == 0) break; if(virtual_dma_mode) /* fd_outb(*lptr, virtual_dma_port+5); */ *(sun3x_fdc.data_r) = *lptr; else /* *lptr = fd_inb(virtual_dma_port+5); */ *lptr = *(sun3x_fdc.data_r); } virtual_dma_count = lcount; virtual_dma_addr = lptr; /* st = fd_inb(virtual_dma_port+4); */ st = *(sun3x_fdc.status_r); } #ifdef TRACE_FLPY_INT calls++; #endif // pr_info("st=%02x\n", st); if(st == 0x20) return IRQ_HANDLED; if(!(st & 0x20)) { virtual_dma_residue += virtual_dma_count; virtual_dma_count=0; doing_pdma = 0; #ifdef TRACE_FLPY_INT pr_info("count=%x, residue=%x calls=%d bytes=%x dma_wait=%d\n", virtual_dma_count, virtual_dma_residue, calls, bytes, dma_wait); calls = 0; dma_wait=0; #endif floppy_interrupt(irq, dev_id); return IRQ_HANDLED; } #ifdef TRACE_FLPY_INT if(!virtual_dma_count) dma_wait++; #endif return IRQ_HANDLED; } static int sun3xflop_request_irq(void) { static int once = 0; int error; if(!once) { once = 1; error = request_irq(FLOPPY_IRQ, sun3xflop_hardint, 0, "floppy", NULL); return ((error == 0) ? 0 : -1); } else return 0; } static void __init floppy_set_flags(int *ints,int param, int param2); static int sun3xflop_init(void) { if(FLOPPY_IRQ < 0x40) FLOPPY_IRQ = SUN3X_FDC_IRQ; sun3x_fdc.status_r = (volatile unsigned char *)SUN3X_FDC; sun3x_fdc.data_r = (volatile unsigned char *)(SUN3X_FDC+1); sun3x_fdc.fcr_r = (volatile unsigned char *)SUN3X_FDC_FCR; sun3x_fdc.fvr_r = (volatile unsigned char *)SUN3X_FDC_FVR; sun3x_fdc.fcr = 0; /* Last minute sanity check... */ if(*sun3x_fdc.status_r == 0xff) { return -1; } *sun3x_fdc.fvr_r = FLOPPY_IRQ; *sun3x_fdc.fcr_r = FCR_TC; udelay(10); *sun3x_fdc.fcr_r = 0; /* Success... */ floppy_set_flags(NULL, 1, FD_BROKEN_DCL); // I don't know how to detect this. allowed_drive_mask = 0x01; return (int) SUN3X_FDC; } /* I'm not precisely sure this eject routine works */ static int sun3x_eject(void) { if(MACH_IS_SUN3X) { sun3x_fdc.fcr |= (FCR_DSEL0 | FCR_EJECT); *(sun3x_fdc.fcr_r) = sun3x_fdc.fcr; udelay(10); sun3x_fdc.fcr &= ~(FCR_DSEL0 | FCR_EJECT); *(sun3x_fdc.fcr_r) = sun3x_fdc.fcr; } return 0; } #define fd_eject(drive) sun3x_eject() #endif /* !(__ASM_SUN3X_FLOPPY_H) */ |