xref: /openbmc/linux/drivers/scsi/fdomain.c (revision 745b7908)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters
4  * Copyright 2019 Ondrej Zary
5  *
6  * Original driver by
7  * Rickard E. Faith, faith@cs.unc.edu
8  *
9  * Future Domain BIOS versions supported for autodetect:
10  *    2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61
11  * Chips supported:
12  *    TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
13  * Boards supported:
14  *    Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
15  *    Future Domain TMC-3260 (PCI)
16  *    Quantum ISA-200S, ISA-250MG
17  *    Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
18  *    IBM ?
19  *
20  * NOTE:
21  *
22  * The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
23  * Use the aic7xxx driver for this board.
24  *
25  * The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
26  * driver for that card.  Unfortunately, the boxes will probably just say
27  * "2920", so you'll have to look on the card for a Future Domain logo, or a
28  * letter after the 2920.
29  *
30  * If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
31  * your board.
32  *
33  * DESCRIPTION:
34  *
35  * This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
36  * TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
37  * 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
38  * high-density external connector.  The 1670 and 1680 have floppy disk
39  * controllers built in.  The TMC-3260 is a PCI bus card.
40  *
41  * Future Domain's older boards are based on the TMC-1800 chip, and this
42  * driver was originally written for a TMC-1680 board with the TMC-1800 chip.
43  * More recently, boards are being produced with the TMC-18C50 and TMC-18C30
44  * chips.
45  *
46  * Please note that the drive ordering that Future Domain implemented in BIOS
47  * versions 3.4 and 3.5 is the opposite of the order (currently) used by the
48  * rest of the SCSI industry.
49  *
50  *
51  * REFERENCES USED:
52  *
53  * "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
54  * 1990.
55  *
56  * "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
57  * Corporation, January 1992.
58  *
59  * "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
60  * B/September 1991)", Maxtor Corporation, 1991.
61  *
62  * "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
63  *
64  * "Draft Proposed American National Standard: Small Computer System
65  * Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
66  * revision 10h, October 17, 1991)
67  *
68  * Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric
69  * Youngdale (ericy@cais.com), 1992.
70  *
71  * Private communication, Tuong Le (Future Domain Engineering department),
72  * 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
73  * TMC-18C30 detection.)
74  *
75  * Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
76  * 60 (2.39: Disk Partition Table Layout).
77  *
78  * "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
79  * 6-1.
80  */
81 
82 #include <linux/module.h>
83 #include <linux/interrupt.h>
84 #include <linux/delay.h>
85 #include <linux/pci.h>
86 #include <linux/workqueue.h>
87 #include <scsi/scsicam.h>
88 #include <scsi/scsi_cmnd.h>
89 #include <scsi/scsi_device.h>
90 #include <scsi/scsi_host.h>
91 #include "fdomain.h"
92 
93 /*
94  * FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
95  * 18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
96  * the SCSI device, an interrupt will be raised.  Therefore, this could be as
97  * low as 0, or as high as 16.  Note, however, that values which are too high
98  * or too low seem to prevent any interrupts from occurring, and thereby lock
99  * up the machine.
100  */
101 #define FIFO_COUNT	2	/* Number of 512 byte blocks before INTR */
102 #define PARITY_MASK	ACTL_PAREN	/* Parity enabled, 0 = disabled */
103 
104 enum chip_type {
105 	unknown		= 0x00,
106 	tmc1800		= 0x01,
107 	tmc18c50	= 0x02,
108 	tmc18c30	= 0x03,
109 };
110 
111 struct fdomain {
112 	int base;
113 	struct scsi_cmnd *cur_cmd;
114 	enum chip_type chip;
115 	struct work_struct work;
116 };
117 
118 static struct scsi_pointer *fdomain_scsi_pointer(struct scsi_cmnd *cmd)
119 {
120 	return scsi_cmd_priv(cmd);
121 }
122 
123 static inline void fdomain_make_bus_idle(struct fdomain *fd)
124 {
125 	outb(0, fd->base + REG_BCTL);
126 	outb(0, fd->base + REG_MCTL);
127 	if (fd->chip == tmc18c50 || fd->chip == tmc18c30)
128 		/* Clear forced intr. */
129 		outb(ACTL_RESET | ACTL_CLRFIRQ | PARITY_MASK,
130 		     fd->base + REG_ACTL);
131 	else
132 		outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL);
133 }
134 
135 static enum chip_type fdomain_identify(int port)
136 {
137 	u16 id = inb(port + REG_ID_LSB) | inb(port + REG_ID_MSB) << 8;
138 
139 	switch (id) {
140 	case 0x6127:
141 		return tmc1800;
142 	case 0x60e9: /* 18c50 or 18c30 */
143 		break;
144 	default:
145 		return unknown;
146 	}
147 
148 	/* Try to toggle 32-bit mode. This only works on an 18c30 chip. */
149 	outb(CFG2_32BIT, port + REG_CFG2);
150 	if ((inb(port + REG_CFG2) & CFG2_32BIT)) {
151 		outb(0, port + REG_CFG2);
152 		if ((inb(port + REG_CFG2) & CFG2_32BIT) == 0)
153 			return tmc18c30;
154 	}
155 	/* If that failed, we are an 18c50. */
156 	return tmc18c50;
157 }
158 
159 static int fdomain_test_loopback(int base)
160 {
161 	int i;
162 
163 	for (i = 0; i < 255; i++) {
164 		outb(i, base + REG_LOOPBACK);
165 		if (inb(base + REG_LOOPBACK) != i)
166 			return 1;
167 	}
168 
169 	return 0;
170 }
171 
172 static void fdomain_reset(int base)
173 {
174 	outb(BCTL_RST, base + REG_BCTL);
175 	mdelay(20);
176 	outb(0, base + REG_BCTL);
177 	mdelay(1150);
178 	outb(0, base + REG_MCTL);
179 	outb(PARITY_MASK, base + REG_ACTL);
180 }
181 
182 static int fdomain_select(struct Scsi_Host *sh, int target)
183 {
184 	int status;
185 	unsigned long timeout;
186 	struct fdomain *fd = shost_priv(sh);
187 
188 	outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
189 	outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK);
190 
191 	/* Stop arbitration and enable parity */
192 	outb(PARITY_MASK, fd->base + REG_ACTL);
193 
194 	timeout = 350;	/* 350 msec */
195 
196 	do {
197 		status = inb(fd->base + REG_BSTAT);
198 		if (status & BSTAT_BSY) {
199 			/* Enable SCSI Bus */
200 			/* (on error, should make bus idle with 0) */
201 			outb(BCTL_BUSEN, fd->base + REG_BCTL);
202 			return 0;
203 		}
204 		mdelay(1);
205 	} while (--timeout);
206 	fdomain_make_bus_idle(fd);
207 	return 1;
208 }
209 
210 static void fdomain_finish_cmd(struct fdomain *fd)
211 {
212 	outb(0, fd->base + REG_ICTL);
213 	fdomain_make_bus_idle(fd);
214 	scsi_done(fd->cur_cmd);
215 	fd->cur_cmd = NULL;
216 }
217 
218 static void fdomain_read_data(struct scsi_cmnd *cmd)
219 {
220 	struct fdomain *fd = shost_priv(cmd->device->host);
221 	unsigned char *virt, *ptr;
222 	size_t offset, len;
223 
224 	while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) {
225 		offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
226 		virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
227 					   &offset, &len);
228 		ptr = virt + offset;
229 		if (len & 1)
230 			*ptr++ = inb(fd->base + REG_FIFO);
231 		if (len > 1)
232 			insw(fd->base + REG_FIFO, ptr, len >> 1);
233 		scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
234 		scsi_kunmap_atomic_sg(virt);
235 	}
236 }
237 
238 static void fdomain_write_data(struct scsi_cmnd *cmd)
239 {
240 	struct fdomain *fd = shost_priv(cmd->device->host);
241 	/* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */
242 	int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000;
243 	unsigned char *virt, *ptr;
244 	size_t offset, len;
245 
246 	while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) {
247 		offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
248 		if (len + offset > scsi_bufflen(cmd)) {
249 			len = scsi_bufflen(cmd) - offset;
250 			if (len == 0)
251 				break;
252 		}
253 		virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
254 					   &offset, &len);
255 		ptr = virt + offset;
256 		if (len & 1)
257 			outb(*ptr++, fd->base + REG_FIFO);
258 		if (len > 1)
259 			outsw(fd->base + REG_FIFO, ptr, len >> 1);
260 		scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
261 		scsi_kunmap_atomic_sg(virt);
262 	}
263 }
264 
265 static void fdomain_work(struct work_struct *work)
266 {
267 	struct fdomain *fd = container_of(work, struct fdomain, work);
268 	struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
269 					    hostdata);
270 	struct scsi_cmnd *cmd = fd->cur_cmd;
271 	struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
272 	unsigned long flags;
273 	int status;
274 	int done = 0;
275 
276 	spin_lock_irqsave(sh->host_lock, flags);
277 
278 	if (scsi_pointer->phase & in_arbitration) {
279 		status = inb(fd->base + REG_ASTAT);
280 		if (!(status & ASTAT_ARB)) {
281 			set_host_byte(cmd, DID_BUS_BUSY);
282 			fdomain_finish_cmd(fd);
283 			goto out;
284 		}
285 		scsi_pointer->phase = in_selection;
286 
287 		outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);
288 		outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
289 		outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)),
290 		     fd->base + REG_SCSI_DATA_NOACK);
291 		/* Stop arbitration and enable parity */
292 		outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
293 		goto out;
294 	} else if (scsi_pointer->phase & in_selection) {
295 		status = inb(fd->base + REG_BSTAT);
296 		if (!(status & BSTAT_BSY)) {
297 			/* Try again, for slow devices */
298 			if (fdomain_select(cmd->device->host, scmd_id(cmd))) {
299 				set_host_byte(cmd, DID_NO_CONNECT);
300 				fdomain_finish_cmd(fd);
301 				goto out;
302 			}
303 			/* Stop arbitration and enable parity */
304 			outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
305 		}
306 		scsi_pointer->phase = in_other;
307 		outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
308 		outb(BCTL_BUSEN, fd->base + REG_BCTL);
309 		goto out;
310 	}
311 
312 	/* fdomain_scsi_pointer(cur_cmd)->phase == in_other: this is the body of the routine */
313 	status = inb(fd->base + REG_BSTAT);
314 
315 	if (status & BSTAT_REQ) {
316 		switch (status & (BSTAT_MSG | BSTAT_CMD | BSTAT_IO)) {
317 		case BSTAT_CMD:	/* COMMAND OUT */
318 			outb(cmd->cmnd[scsi_pointer->sent_command++],
319 			     fd->base + REG_SCSI_DATA);
320 			break;
321 		case 0:	/* DATA OUT -- tmc18c50/tmc18c30 only */
322 			if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
323 				scsi_pointer->have_data_in = -1;
324 				outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
325 				     PARITY_MASK, fd->base + REG_ACTL);
326 			}
327 			break;
328 		case BSTAT_IO:	/* DATA IN -- tmc18c50/tmc18c30 only */
329 			if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
330 				scsi_pointer->have_data_in = 1;
331 				outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
332 				     fd->base + REG_ACTL);
333 			}
334 			break;
335 		case BSTAT_CMD | BSTAT_IO:	/* STATUS IN */
336 			scsi_pointer->Status = inb(fd->base + REG_SCSI_DATA);
337 			break;
338 		case BSTAT_MSG | BSTAT_CMD:	/* MESSAGE OUT */
339 			outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);
340 			break;
341 		case BSTAT_MSG | BSTAT_CMD | BSTAT_IO:	/* MESSAGE IN */
342 			scsi_pointer->Message = inb(fd->base + REG_SCSI_DATA);
343 			if (scsi_pointer->Message == COMMAND_COMPLETE)
344 				++done;
345 			break;
346 		}
347 	}
348 
349 	if (fd->chip == tmc1800 && !scsi_pointer->have_data_in &&
350 	    scsi_pointer->sent_command >= cmd->cmd_len) {
351 		if (cmd->sc_data_direction == DMA_TO_DEVICE) {
352 			scsi_pointer->have_data_in = -1;
353 			outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
354 			     PARITY_MASK, fd->base + REG_ACTL);
355 		} else {
356 			scsi_pointer->have_data_in = 1;
357 			outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
358 			     fd->base + REG_ACTL);
359 		}
360 	}
361 
362 	if (scsi_pointer->have_data_in == -1) /* DATA OUT */
363 		fdomain_write_data(cmd);
364 
365 	if (scsi_pointer->have_data_in == 1) /* DATA IN */
366 		fdomain_read_data(cmd);
367 
368 	if (done) {
369 		set_status_byte(cmd, scsi_pointer->Status);
370 		set_host_byte(cmd, DID_OK);
371 		scsi_msg_to_host_byte(cmd, scsi_pointer->Message);
372 		fdomain_finish_cmd(fd);
373 	} else {
374 		if (scsi_pointer->phase & disconnect) {
375 			outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
376 			     fd->base + REG_ICTL);
377 			outb(0, fd->base + REG_BCTL);
378 		} else
379 			outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT,
380 			     fd->base + REG_ICTL);
381 	}
382 out:
383 	spin_unlock_irqrestore(sh->host_lock, flags);
384 }
385 
386 static irqreturn_t fdomain_irq(int irq, void *dev_id)
387 {
388 	struct fdomain *fd = dev_id;
389 
390 	/* Is it our IRQ? */
391 	if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0)
392 		return IRQ_NONE;
393 
394 	outb(0, fd->base + REG_ICTL);
395 
396 	/* We usually have one spurious interrupt after each command. */
397 	if (!fd->cur_cmd)	/* Spurious interrupt */
398 		return IRQ_NONE;
399 
400 	schedule_work(&fd->work);
401 
402 	return IRQ_HANDLED;
403 }
404 
405 static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
406 {
407 	struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
408 	struct fdomain *fd = shost_priv(cmd->device->host);
409 	unsigned long flags;
410 
411 	scsi_pointer->Status		= 0;
412 	scsi_pointer->Message		= 0;
413 	scsi_pointer->have_data_in	= 0;
414 	scsi_pointer->sent_command	= 0;
415 	scsi_pointer->phase		= in_arbitration;
416 	scsi_set_resid(cmd, scsi_bufflen(cmd));
417 
418 	spin_lock_irqsave(sh->host_lock, flags);
419 
420 	fd->cur_cmd = cmd;
421 
422 	fdomain_make_bus_idle(fd);
423 
424 	/* Start arbitration */
425 	outb(0, fd->base + REG_ICTL);
426 	outb(0, fd->base + REG_BCTL);	/* Disable data drivers */
427 	/* Set our id bit */
428 	outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK);
429 	outb(ICTL_ARB, fd->base + REG_ICTL);
430 	/* Start arbitration */
431 	outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
432 
433 	spin_unlock_irqrestore(sh->host_lock, flags);
434 
435 	return 0;
436 }
437 
438 static int fdomain_abort(struct scsi_cmnd *cmd)
439 {
440 	struct Scsi_Host *sh = cmd->device->host;
441 	struct fdomain *fd = shost_priv(sh);
442 	unsigned long flags;
443 
444 	if (!fd->cur_cmd)
445 		return FAILED;
446 
447 	spin_lock_irqsave(sh->host_lock, flags);
448 
449 	fdomain_make_bus_idle(fd);
450 	fdomain_scsi_pointer(fd->cur_cmd)->phase |= aborted;
451 
452 	/* Aborts are not done well. . . */
453 	set_host_byte(fd->cur_cmd, DID_ABORT);
454 	fdomain_finish_cmd(fd);
455 	spin_unlock_irqrestore(sh->host_lock, flags);
456 	return SUCCESS;
457 }
458 
459 static int fdomain_host_reset(struct scsi_cmnd *cmd)
460 {
461 	struct Scsi_Host *sh = cmd->device->host;
462 	struct fdomain *fd = shost_priv(sh);
463 	unsigned long flags;
464 
465 	spin_lock_irqsave(sh->host_lock, flags);
466 	fdomain_reset(fd->base);
467 	spin_unlock_irqrestore(sh->host_lock, flags);
468 	return SUCCESS;
469 }
470 
471 static int fdomain_biosparam(struct scsi_device *sdev,
472 			     struct block_device *bdev,	sector_t capacity,
473 			     int geom[])
474 {
475 	unsigned char *p = scsi_bios_ptable(bdev);
476 
477 	if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
478 	    && p[4]) {	 /* Partition type */
479 		geom[0] = p[5] + 1;	/* heads */
480 		geom[1] = p[6] & 0x3f;	/* sectors */
481 	} else {
482 		if (capacity >= 0x7e0000) {
483 			geom[0] = 255;	/* heads */
484 			geom[1] = 63;	/* sectors */
485 		} else if (capacity >= 0x200000) {
486 			geom[0] = 128;	/* heads */
487 			geom[1] = 63;	/* sectors */
488 		} else {
489 			geom[0] = 64;	/* heads */
490 			geom[1] = 32;	/* sectors */
491 		}
492 	}
493 	geom[2] = sector_div(capacity, geom[0] * geom[1]);
494 	kfree(p);
495 
496 	return 0;
497 }
498 
499 static const struct scsi_host_template fdomain_template = {
500 	.module			= THIS_MODULE,
501 	.name			= "Future Domain TMC-16x0",
502 	.proc_name		= "fdomain",
503 	.queuecommand		= fdomain_queue,
504 	.eh_abort_handler	= fdomain_abort,
505 	.eh_host_reset_handler	= fdomain_host_reset,
506 	.bios_param		= fdomain_biosparam,
507 	.can_queue		= 1,
508 	.this_id		= 7,
509 	.sg_tablesize		= 64,
510 	.dma_boundary		= PAGE_SIZE - 1,
511 	.cmd_size		= sizeof(struct scsi_pointer),
512 };
513 
514 struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
515 				 struct device *dev)
516 {
517 	struct Scsi_Host *sh;
518 	struct fdomain *fd;
519 	enum chip_type chip;
520 	static const char * const chip_names[] = {
521 		"Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30"
522 	};
523 	unsigned long irq_flags = 0;
524 
525 	chip = fdomain_identify(base);
526 	if (!chip)
527 		return NULL;
528 
529 	fdomain_reset(base);
530 
531 	if (fdomain_test_loopback(base))
532 		return NULL;
533 
534 	if (!irq) {
535 		dev_err(dev, "card has no IRQ assigned");
536 		return NULL;
537 	}
538 
539 	sh = scsi_host_alloc(&fdomain_template, sizeof(struct fdomain));
540 	if (!sh)
541 		return NULL;
542 
543 	if (this_id)
544 		sh->this_id = this_id & 0x07;
545 
546 	sh->irq = irq;
547 	sh->io_port = base;
548 	sh->n_io_port = FDOMAIN_REGION_SIZE;
549 
550 	fd = shost_priv(sh);
551 	fd->base = base;
552 	fd->chip = chip;
553 	INIT_WORK(&fd->work, fdomain_work);
554 
555 	if (dev_is_pci(dev) || !strcmp(dev->bus->name, "pcmcia"))
556 		irq_flags = IRQF_SHARED;
557 
558 	if (request_irq(irq, fdomain_irq, irq_flags, "fdomain", fd))
559 		goto fail_put;
560 
561 	shost_printk(KERN_INFO, sh, "%s chip at 0x%x irq %d SCSI ID %d\n",
562 		     dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip],
563 		     base, irq, sh->this_id);
564 
565 	if (scsi_add_host(sh, dev))
566 		goto fail_free_irq;
567 
568 	scsi_scan_host(sh);
569 
570 	return sh;
571 
572 fail_free_irq:
573 	free_irq(irq, fd);
574 fail_put:
575 	scsi_host_put(sh);
576 	return NULL;
577 }
578 EXPORT_SYMBOL_GPL(fdomain_create);
579 
580 int fdomain_destroy(struct Scsi_Host *sh)
581 {
582 	struct fdomain *fd = shost_priv(sh);
583 
584 	cancel_work_sync(&fd->work);
585 	scsi_remove_host(sh);
586 	if (sh->irq)
587 		free_irq(sh->irq, fd);
588 	scsi_host_put(sh);
589 	return 0;
590 }
591 EXPORT_SYMBOL_GPL(fdomain_destroy);
592 
593 #ifdef CONFIG_PM_SLEEP
594 static int fdomain_resume(struct device *dev)
595 {
596 	struct fdomain *fd = shost_priv(dev_get_drvdata(dev));
597 
598 	fdomain_reset(fd->base);
599 	return 0;
600 }
601 
602 static SIMPLE_DEV_PM_OPS(fdomain_pm_ops, NULL, fdomain_resume);
603 #endif /* CONFIG_PM_SLEEP */
604 
605 MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
606 MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver");
607 MODULE_LICENSE("GPL");
608