1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* floppy.h: Sparc specific parts of the Floppy driver. 3 * 4 * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net) 5 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 * 7 * Ultra/PCI support added: Sep 1997 Eddie C. Dost (ecd@skynet.be) 8 */ 9 10 #ifndef __ASM_SPARC64_FLOPPY_H 11 #define __ASM_SPARC64_FLOPPY_H 12 13 #include <linux/of.h> 14 #include <linux/of_platform.h> 15 #include <linux/dma-mapping.h> 16 17 #include <asm/auxio.h> 18 19 /* 20 * Define this to enable exchanging drive 0 and 1 if only drive 1 is 21 * probed on PCI machines. 22 */ 23 #undef PCI_FDC_SWAP_DRIVES 24 25 26 /* References: 27 * 1) Netbsd Sun floppy driver. 28 * 2) NCR 82077 controller manual 29 * 3) Intel 82077 controller manual 30 */ 31 struct sun_flpy_controller { 32 volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */ 33 volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */ 34 volatile unsigned char dor_82077; /* Digital Output reg. */ 35 volatile unsigned char tapectl_82077; /* Tape Control reg */ 36 volatile unsigned char status_82077; /* Main Status Register. */ 37 #define drs_82077 status_82077 /* Digital Rate Select reg. */ 38 volatile unsigned char data_82077; /* Data fifo. */ 39 volatile unsigned char ___unused; 40 volatile unsigned char dir_82077; /* Digital Input reg. */ 41 #define dcr_82077 dir_82077 /* Config Control reg. */ 42 }; 43 44 /* You'll only ever find one controller on an Ultra anyways. */ 45 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1; 46 unsigned long fdc_status; 47 static struct platform_device *floppy_op = NULL; 48 49 struct sun_floppy_ops { 50 unsigned char (*fd_inb) (unsigned long port, unsigned int reg); 51 void (*fd_outb) (unsigned char value, unsigned long base, 52 unsigned int reg); 53 void (*fd_enable_dma) (void); 54 void (*fd_disable_dma) (void); 55 void (*fd_set_dma_mode) (int); 56 void (*fd_set_dma_addr) (char *); 57 void (*fd_set_dma_count) (int); 58 unsigned int (*get_dma_residue) (void); 59 int (*fd_request_irq) (void); 60 void (*fd_free_irq) (void); 61 int (*fd_eject) (int); 62 }; 63 64 static struct sun_floppy_ops sun_fdops; 65 66 #define fd_inb(base, reg) sun_fdops.fd_inb(base, reg) 67 #define fd_outb(value, base, reg) sun_fdops.fd_outb(value, base, reg) 68 #define fd_enable_dma() sun_fdops.fd_enable_dma() 69 #define fd_disable_dma() sun_fdops.fd_disable_dma() 70 #define fd_request_dma() (0) /* nothing... */ 71 #define fd_free_dma() /* nothing... */ 72 #define fd_clear_dma_ff() /* nothing... */ 73 #define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode) 74 #define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr) 75 #define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count) 76 #define get_dma_residue(x) sun_fdops.get_dma_residue() 77 #define fd_request_irq() sun_fdops.fd_request_irq() 78 #define fd_free_irq() sun_fdops.fd_free_irq() 79 #define fd_eject(drive) sun_fdops.fd_eject(drive) 80 81 /* Super paranoid... */ 82 #undef HAVE_DISABLE_HLT 83 84 static int sun_floppy_types[2] = { 0, 0 }; 85 86 /* Here is where we catch the floppy driver trying to initialize, 87 * therefore this is where we call the PROM device tree probing 88 * routine etc. on the Sparc. 89 */ 90 #define FLOPPY0_TYPE sun_floppy_init() 91 #define FLOPPY1_TYPE sun_floppy_types[1] 92 93 #define FDC1 ((unsigned long)sun_fdc) 94 95 #define N_FDC 1 96 #define N_DRIVE 8 97 98 static unsigned char sun_82077_fd_inb(unsigned long base, unsigned int reg) 99 { 100 udelay(5); 101 switch (reg) { 102 default: 103 printk("floppy: Asked to read unknown port %x\n", reg); 104 panic("floppy: Port bolixed."); 105 case FD_STATUS: 106 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA; 107 case FD_DATA: 108 return sbus_readb(&sun_fdc->data_82077); 109 case FD_DIR: 110 /* XXX: Is DCL on 0x80 in sun4m? */ 111 return sbus_readb(&sun_fdc->dir_82077); 112 } 113 panic("sun_82072_fd_inb: How did I get here?"); 114 } 115 116 static void sun_82077_fd_outb(unsigned char value, unsigned long base, 117 unsigned int reg) 118 { 119 udelay(5); 120 switch (reg) { 121 default: 122 printk("floppy: Asked to write to unknown port %x\n", reg); 123 panic("floppy: Port bolixed."); 124 case FD_DOR: 125 /* Happily, the 82077 has a real DOR register. */ 126 sbus_writeb(value, &sun_fdc->dor_82077); 127 break; 128 case FD_DATA: 129 sbus_writeb(value, &sun_fdc->data_82077); 130 break; 131 case FD_DCR: 132 sbus_writeb(value, &sun_fdc->dcr_82077); 133 break; 134 case FD_DSR: 135 sbus_writeb(value, &sun_fdc->status_82077); 136 break; 137 } 138 return; 139 } 140 141 /* For pseudo-dma (Sun floppy drives have no real DMA available to 142 * them so we must eat the data fifo bytes directly ourselves) we have 143 * three state variables. doing_pdma tells our inline low-level 144 * assembly floppy interrupt entry point whether it should sit and eat 145 * bytes from the fifo or just transfer control up to the higher level 146 * floppy interrupt c-code. I tried very hard but I could not get the 147 * pseudo-dma to work in c-code without getting many overruns and 148 * underruns. If non-zero, doing_pdma encodes the direction of 149 * the transfer for debugging. 1=read 2=write 150 */ 151 unsigned char *pdma_vaddr; 152 unsigned long pdma_size; 153 volatile int doing_pdma = 0; 154 155 /* This is software state */ 156 char *pdma_base = NULL; 157 unsigned long pdma_areasize; 158 159 /* Common routines to all controller types on the Sparc. */ 160 static void sun_fd_disable_dma(void) 161 { 162 doing_pdma = 0; 163 pdma_base = NULL; 164 } 165 166 static void sun_fd_set_dma_mode(int mode) 167 { 168 switch(mode) { 169 case DMA_MODE_READ: 170 doing_pdma = 1; 171 break; 172 case DMA_MODE_WRITE: 173 doing_pdma = 2; 174 break; 175 default: 176 printk("Unknown dma mode %d\n", mode); 177 panic("floppy: Giving up..."); 178 } 179 } 180 181 static void sun_fd_set_dma_addr(char *buffer) 182 { 183 pdma_vaddr = buffer; 184 } 185 186 static void sun_fd_set_dma_count(int length) 187 { 188 pdma_size = length; 189 } 190 191 static void sun_fd_enable_dma(void) 192 { 193 pdma_base = pdma_vaddr; 194 pdma_areasize = pdma_size; 195 } 196 197 static irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie) 198 { 199 if (likely(doing_pdma)) { 200 void __iomem *stat = (void __iomem *) fdc_status; 201 unsigned char *vaddr = pdma_vaddr; 202 unsigned long size = pdma_size; 203 u8 val; 204 205 while (size) { 206 val = readb(stat); 207 if (unlikely(!(val & 0x80))) { 208 pdma_vaddr = vaddr; 209 pdma_size = size; 210 return IRQ_HANDLED; 211 } 212 if (unlikely(!(val & 0x20))) { 213 pdma_vaddr = vaddr; 214 pdma_size = size; 215 doing_pdma = 0; 216 goto main_interrupt; 217 } 218 if (val & 0x40) { 219 /* read */ 220 *vaddr++ = readb(stat + 1); 221 } else { 222 unsigned char data = *vaddr++; 223 224 /* write */ 225 writeb(data, stat + 1); 226 } 227 size--; 228 } 229 230 pdma_vaddr = vaddr; 231 pdma_size = size; 232 233 /* Send Terminal Count pulse to floppy controller. */ 234 val = readb(auxio_register); 235 val |= AUXIO_AUX1_FTCNT; 236 writeb(val, auxio_register); 237 val &= ~AUXIO_AUX1_FTCNT; 238 writeb(val, auxio_register); 239 240 doing_pdma = 0; 241 } 242 243 main_interrupt: 244 return floppy_interrupt(irq, dev_cookie); 245 } 246 247 static int sun_fd_request_irq(void) 248 { 249 static int once = 0; 250 int error; 251 252 if(!once) { 253 once = 1; 254 255 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, 256 0, "floppy", NULL); 257 258 return ((error == 0) ? 0 : -1); 259 } 260 return 0; 261 } 262 263 static void sun_fd_free_irq(void) 264 { 265 } 266 267 static unsigned int sun_get_dma_residue(void) 268 { 269 /* XXX This isn't really correct. XXX */ 270 return 0; 271 } 272 273 static int sun_fd_eject(int drive) 274 { 275 set_dor(0x00, 0xff, 0x90); 276 udelay(500); 277 set_dor(0x00, 0x6f, 0x00); 278 udelay(500); 279 return 0; 280 } 281 282 #include <asm/ebus_dma.h> 283 #include <asm/ns87303.h> 284 285 static struct ebus_dma_info sun_pci_fd_ebus_dma; 286 static struct device *sun_floppy_dev; 287 static int sun_pci_broken_drive = -1; 288 289 struct sun_pci_dma_op { 290 unsigned int addr; 291 int len; 292 int direction; 293 char *buf; 294 }; 295 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; 296 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; 297 298 irqreturn_t floppy_interrupt(int irq, void *dev_id); 299 300 static unsigned char sun_pci_fd_inb(unsigned long base, unsigned int reg) 301 { 302 udelay(5); 303 return inb(base + reg); 304 } 305 306 static void sun_pci_fd_outb(unsigned char val, unsigned long base, 307 unsigned int reg) 308 { 309 udelay(5); 310 outb(val, base + reg); 311 } 312 313 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long base, 314 unsigned int reg) 315 { 316 udelay(5); 317 /* 318 * XXX: Due to SUN's broken floppy connector on AX and AXi 319 * we need to turn on MOTOR_0 also, if the floppy is 320 * jumpered to DS1 (like most PC floppies are). I hope 321 * this does not hurt correct hardware like the AXmp. 322 * (Eddie, Sep 12 1998). 323 */ 324 if (reg == FD_DOR) { 325 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) { 326 val |= 0x10; 327 } 328 } 329 outb(val, base + reg); 330 } 331 332 #ifdef PCI_FDC_SWAP_DRIVES 333 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long base, 334 unsigned int reg) 335 { 336 udelay(5); 337 /* 338 * XXX: Due to SUN's broken floppy connector on AX and AXi 339 * we need to turn on MOTOR_0 also, if the floppy is 340 * jumpered to DS1 (like most PC floppies are). I hope 341 * this does not hurt correct hardware like the AXmp. 342 * (Eddie, Sep 12 1998). 343 */ 344 if (reg == FD_DOR) { 345 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) { 346 val &= ~(0x03); 347 val |= 0x21; 348 } 349 } 350 outb(val, base + reg); 351 } 352 #endif /* PCI_FDC_SWAP_DRIVES */ 353 354 static void sun_pci_fd_enable_dma(void) 355 { 356 BUG_ON((NULL == sun_pci_dma_pending.buf) || 357 (0 == sun_pci_dma_pending.len) || 358 (0 == sun_pci_dma_pending.direction)); 359 360 sun_pci_dma_current.buf = sun_pci_dma_pending.buf; 361 sun_pci_dma_current.len = sun_pci_dma_pending.len; 362 sun_pci_dma_current.direction = sun_pci_dma_pending.direction; 363 364 sun_pci_dma_pending.buf = NULL; 365 sun_pci_dma_pending.len = 0; 366 sun_pci_dma_pending.direction = 0; 367 sun_pci_dma_pending.addr = -1U; 368 369 sun_pci_dma_current.addr = 370 dma_map_single(sun_floppy_dev, 371 sun_pci_dma_current.buf, 372 sun_pci_dma_current.len, 373 sun_pci_dma_current.direction); 374 375 ebus_dma_enable(&sun_pci_fd_ebus_dma, 1); 376 377 if (ebus_dma_request(&sun_pci_fd_ebus_dma, 378 sun_pci_dma_current.addr, 379 sun_pci_dma_current.len)) 380 BUG(); 381 } 382 383 static void sun_pci_fd_disable_dma(void) 384 { 385 ebus_dma_enable(&sun_pci_fd_ebus_dma, 0); 386 if (sun_pci_dma_current.addr != -1U) 387 dma_unmap_single(sun_floppy_dev, 388 sun_pci_dma_current.addr, 389 sun_pci_dma_current.len, 390 sun_pci_dma_current.direction); 391 sun_pci_dma_current.addr = -1U; 392 } 393 394 static void sun_pci_fd_set_dma_mode(int mode) 395 { 396 if (mode == DMA_MODE_WRITE) 397 sun_pci_dma_pending.direction = DMA_TO_DEVICE; 398 else 399 sun_pci_dma_pending.direction = DMA_FROM_DEVICE; 400 401 ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); 402 } 403 404 static void sun_pci_fd_set_dma_count(int length) 405 { 406 sun_pci_dma_pending.len = length; 407 } 408 409 static void sun_pci_fd_set_dma_addr(char *buffer) 410 { 411 sun_pci_dma_pending.buf = buffer; 412 } 413 414 static unsigned int sun_pci_get_dma_residue(void) 415 { 416 return ebus_dma_residue(&sun_pci_fd_ebus_dma); 417 } 418 419 static int sun_pci_fd_request_irq(void) 420 { 421 return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); 422 } 423 424 static void sun_pci_fd_free_irq(void) 425 { 426 ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); 427 } 428 429 static int sun_pci_fd_eject(int drive) 430 { 431 return -EINVAL; 432 } 433 434 static void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, 435 void *cookie) 436 { 437 floppy_interrupt(0, NULL); 438 } 439 440 /* 441 * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI, 442 * even if this is configured using DS1, thus looks like /dev/fd1 with 443 * the cabling used in Ultras. 444 */ 445 #define DOR (port + 2) 446 #define MSR (port + 4) 447 #define FIFO (port + 5) 448 449 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val, 450 unsigned long reg) 451 { 452 unsigned char status; 453 int timeout = 1000; 454 455 while (!((status = inb(MSR)) & 0x80) && --timeout) 456 udelay(100); 457 outb(val, reg); 458 } 459 460 static unsigned char sun_pci_fd_sensei(unsigned long port) 461 { 462 unsigned char result[2] = { 0x70, 0x00 }; 463 unsigned char status; 464 int i = 0; 465 466 sun_pci_fd_out_byte(port, 0x08, FIFO); 467 do { 468 int timeout = 1000; 469 470 while (!((status = inb(MSR)) & 0x80) && --timeout) 471 udelay(100); 472 473 if (!timeout) 474 break; 475 476 if ((status & 0xf0) == 0xd0) 477 result[i++] = inb(FIFO); 478 else 479 break; 480 } while (i < 2); 481 482 return result[0]; 483 } 484 485 static void sun_pci_fd_reset(unsigned long port) 486 { 487 unsigned char mask = 0x00; 488 unsigned char status; 489 int timeout = 10000; 490 491 outb(0x80, MSR); 492 do { 493 status = sun_pci_fd_sensei(port); 494 if ((status & 0xc0) == 0xc0) 495 mask |= 1 << (status & 0x03); 496 else 497 udelay(100); 498 } while ((mask != 0x0f) && --timeout); 499 } 500 501 static int sun_pci_fd_test_drive(unsigned long port, int drive) 502 { 503 unsigned char status, data; 504 int timeout = 1000; 505 int ready; 506 507 sun_pci_fd_reset(port); 508 509 data = (0x10 << drive) | 0x0c | drive; 510 sun_pci_fd_out_byte(port, data, DOR); 511 512 sun_pci_fd_out_byte(port, 0x07, FIFO); 513 sun_pci_fd_out_byte(port, drive & 0x03, FIFO); 514 515 do { 516 udelay(100); 517 status = sun_pci_fd_sensei(port); 518 } while (((status & 0xc0) == 0x80) && --timeout); 519 520 if (!timeout) 521 ready = 0; 522 else 523 ready = (status & 0x10) ? 0 : 1; 524 525 sun_pci_fd_reset(port); 526 return ready; 527 } 528 #undef FIFO 529 #undef MSR 530 #undef DOR 531 532 static int __init ebus_fdthree_p(struct device_node *dp) 533 { 534 if (of_node_name_eq(dp, "fdthree")) 535 return 1; 536 if (of_node_name_eq(dp, "floppy")) { 537 const char *compat; 538 539 compat = of_get_property(dp, "compatible", NULL); 540 if (compat && !strcmp(compat, "fdthree")) 541 return 1; 542 } 543 return 0; 544 } 545 546 static unsigned long __init sun_floppy_init(void) 547 { 548 static int initialized = 0; 549 struct device_node *dp; 550 struct platform_device *op; 551 const char *prop; 552 char state[128]; 553 554 if (initialized) 555 return sun_floppy_types[0]; 556 initialized = 1; 557 558 op = NULL; 559 560 for_each_node_by_name(dp, "SUNW,fdtwo") { 561 if (!of_node_name_eq(dp->parent, "sbus")) 562 continue; 563 op = of_find_device_by_node(dp); 564 if (op) 565 break; 566 } 567 if (op) { 568 floppy_op = op; 569 FLOPPY_IRQ = op->archdata.irqs[0]; 570 } else { 571 struct device_node *ebus_dp; 572 void __iomem *auxio_reg; 573 const char *state_prop; 574 unsigned long config; 575 576 dp = NULL; 577 for_each_node_by_name(ebus_dp, "ebus") { 578 for (dp = ebus_dp->child; dp; dp = dp->sibling) { 579 if (ebus_fdthree_p(dp)) 580 goto found_fdthree; 581 } 582 } 583 found_fdthree: 584 if (!dp) 585 return 0; 586 587 op = of_find_device_by_node(dp); 588 if (!op) 589 return 0; 590 591 state_prop = of_get_property(op->dev.of_node, "status", NULL); 592 if (state_prop && !strncmp(state_prop, "disabled", 8)) 593 return 0; 594 595 FLOPPY_IRQ = op->archdata.irqs[0]; 596 597 /* Make sure the high density bit is set, some systems 598 * (most notably Ultra5/Ultra10) come up with it clear. 599 */ 600 auxio_reg = (void __iomem *) op->resource[2].start; 601 writel(readl(auxio_reg)|0x2, auxio_reg); 602 603 sun_floppy_dev = &op->dev; 604 605 spin_lock_init(&sun_pci_fd_ebus_dma.lock); 606 607 /* XXX ioremap */ 608 sun_pci_fd_ebus_dma.regs = (void __iomem *) 609 op->resource[1].start; 610 if (!sun_pci_fd_ebus_dma.regs) 611 return 0; 612 613 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER | 614 EBUS_DMA_FLAG_TCI_DISABLE); 615 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback; 616 sun_pci_fd_ebus_dma.client_cookie = NULL; 617 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ; 618 strcpy(sun_pci_fd_ebus_dma.name, "floppy"); 619 if (ebus_dma_register(&sun_pci_fd_ebus_dma)) 620 return 0; 621 622 /* XXX ioremap */ 623 sun_fdc = (struct sun_flpy_controller *) op->resource[0].start; 624 625 sun_fdops.fd_inb = sun_pci_fd_inb; 626 sun_fdops.fd_outb = sun_pci_fd_outb; 627 628 can_use_virtual_dma = use_virtual_dma = 0; 629 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma; 630 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma; 631 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode; 632 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr; 633 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count; 634 sun_fdops.get_dma_residue = sun_pci_get_dma_residue; 635 636 sun_fdops.fd_request_irq = sun_pci_fd_request_irq; 637 sun_fdops.fd_free_irq = sun_pci_fd_free_irq; 638 639 sun_fdops.fd_eject = sun_pci_fd_eject; 640 641 fdc_status = (unsigned long) &sun_fdc->status_82077; 642 643 /* 644 * XXX: Find out on which machines this is really needed. 645 */ 646 if (1) { 647 sun_pci_broken_drive = 1; 648 sun_fdops.fd_outb = sun_pci_fd_broken_outb; 649 } 650 651 allowed_drive_mask = 0; 652 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0)) 653 sun_floppy_types[0] = 4; 654 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1)) 655 sun_floppy_types[1] = 4; 656 657 /* 658 * Find NS87303 SuperIO config registers (through ecpp). 659 */ 660 config = 0; 661 for (dp = ebus_dp->child; dp; dp = dp->sibling) { 662 if (of_node_name_eq(dp, "ecpp")) { 663 struct platform_device *ecpp_op; 664 665 ecpp_op = of_find_device_by_node(dp); 666 if (ecpp_op) 667 config = ecpp_op->resource[1].start; 668 goto config_done; 669 } 670 } 671 config_done: 672 673 /* 674 * Sanity check, is this really the NS87303? 675 */ 676 switch (config & 0x3ff) { 677 case 0x02e: 678 case 0x15c: 679 case 0x26e: 680 case 0x398: 681 break; 682 default: 683 config = 0; 684 } 685 686 if (!config) 687 return sun_floppy_types[0]; 688 689 /* Enable PC-AT mode. */ 690 ns87303_modify(config, ASC, 0, 0xc0); 691 692 #ifdef PCI_FDC_SWAP_DRIVES 693 /* 694 * If only Floppy 1 is present, swap drives. 695 */ 696 if (!sun_floppy_types[0] && sun_floppy_types[1]) { 697 /* 698 * Set the drive exchange bit in FCR on NS87303, 699 * make sure other bits are sane before doing so. 700 */ 701 ns87303_modify(config, FER, FER_EDM, 0); 702 ns87303_modify(config, ASC, ASC_DRV2_SEL, 0); 703 ns87303_modify(config, FCR, 0, FCR_LDE); 704 705 swap(sun_floppy_types[0], sun_floppy_types[1]); 706 707 if (sun_pci_broken_drive != -1) { 708 sun_pci_broken_drive = 1 - sun_pci_broken_drive; 709 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb; 710 } 711 } 712 #endif /* PCI_FDC_SWAP_DRIVES */ 713 714 return sun_floppy_types[0]; 715 } 716 prop = of_get_property(op->dev.of_node, "status", NULL); 717 if (prop && !strncmp(state, "disabled", 8)) 718 return 0; 719 720 /* 721 * We cannot do of_ioremap here: it does request_region, 722 * which the generic floppy driver tries to do once again. 723 * But we must use the sdev resource values as they have 724 * had parent ranges applied. 725 */ 726 sun_fdc = (struct sun_flpy_controller *) 727 (op->resource[0].start + 728 ((op->resource[0].flags & 0x1ffUL) << 32UL)); 729 730 /* Last minute sanity check... */ 731 if (sbus_readb(&sun_fdc->status1_82077) == 0xff) { 732 sun_fdc = (struct sun_flpy_controller *)-1; 733 return 0; 734 } 735 736 sun_fdops.fd_inb = sun_82077_fd_inb; 737 sun_fdops.fd_outb = sun_82077_fd_outb; 738 739 can_use_virtual_dma = use_virtual_dma = 1; 740 sun_fdops.fd_enable_dma = sun_fd_enable_dma; 741 sun_fdops.fd_disable_dma = sun_fd_disable_dma; 742 sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; 743 sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; 744 sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; 745 sun_fdops.get_dma_residue = sun_get_dma_residue; 746 747 sun_fdops.fd_request_irq = sun_fd_request_irq; 748 sun_fdops.fd_free_irq = sun_fd_free_irq; 749 750 sun_fdops.fd_eject = sun_fd_eject; 751 752 fdc_status = (unsigned long) &sun_fdc->status_82077; 753 754 /* Success... */ 755 allowed_drive_mask = 0x01; 756 sun_floppy_types[0] = 4; 757 sun_floppy_types[1] = 0; 758 759 return sun_floppy_types[0]; 760 } 761 762 #define EXTRA_FLOPPY_PARAMS 763 764 static DEFINE_SPINLOCK(dma_spin_lock); 765 766 #define claim_dma_lock() \ 767 ({ unsigned long flags; \ 768 spin_lock_irqsave(&dma_spin_lock, flags); \ 769 flags; \ 770 }) 771 772 #define release_dma_lock(__flags) \ 773 spin_unlock_irqrestore(&dma_spin_lock, __flags); 774 775 #endif /* !(__ASM_SPARC64_FLOPPY_H) */ 776