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1 /*
2  *  Copyright (C) 1998-2000  Andre Hedrick <andre@linux-ide.org>
3  *  Copyright (C) 1995-1998  Mark Lord
4  *  Copyright (C) 2007-2009  Bartlomiej Zolnierkiewicz
5  *
6  *  May be copied or modified under the terms of the GNU General Public License
7  */
8 
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/export.h>
12 #include <linux/pci.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/ide.h>
16 #include <linux/dma-mapping.h>
17 
18 #include <asm/io.h>
19 
20 /**
21  *	ide_setup_pci_baseregs	-	place a PCI IDE controller native
22  *	@dev: PCI device of interface to switch native
23  *	@name: Name of interface
24  *
25  *	We attempt to place the PCI interface into PCI native mode. If
26  *	we succeed the BARs are ok and the controller is in PCI mode.
27  *	Returns 0 on success or an errno code.
28  *
29  *	FIXME: if we program the interface and then fail to set the BARS
30  *	we don't switch it back to legacy mode. Do we actually care ??
31  */
32 
ide_setup_pci_baseregs(struct pci_dev * dev,const char * name)33 static int ide_setup_pci_baseregs(struct pci_dev *dev, const char *name)
34 {
35 	u8 progif = 0;
36 
37 	/*
38 	 * Place both IDE interfaces into PCI "native" mode:
39 	 */
40 	if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
41 			 (progif & 5) != 5) {
42 		if ((progif & 0xa) != 0xa) {
43 			printk(KERN_INFO "%s %s: device not capable of full "
44 				"native PCI mode\n", name, pci_name(dev));
45 			return -EOPNOTSUPP;
46 		}
47 		printk(KERN_INFO "%s %s: placing both ports into native PCI "
48 			"mode\n", name, pci_name(dev));
49 		(void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
50 		if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
51 		    (progif & 5) != 5) {
52 			printk(KERN_ERR "%s %s: rewrite of PROGIF failed, "
53 				"wanted 0x%04x, got 0x%04x\n",
54 				name, pci_name(dev), progif | 5, progif);
55 			return -EOPNOTSUPP;
56 		}
57 	}
58 	return 0;
59 }
60 
61 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
ide_pci_clear_simplex(unsigned long dma_base,const char * name)62 static int ide_pci_clear_simplex(unsigned long dma_base, const char *name)
63 {
64 	u8 dma_stat = inb(dma_base + 2);
65 
66 	outb(dma_stat & 0x60, dma_base + 2);
67 	dma_stat = inb(dma_base + 2);
68 
69 	return (dma_stat & 0x80) ? 1 : 0;
70 }
71 
72 /**
73  *	ide_pci_dma_base	-	setup BMIBA
74  *	@hwif: IDE interface
75  *	@d: IDE port info
76  *
77  *	Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
78  */
79 
ide_pci_dma_base(ide_hwif_t * hwif,const struct ide_port_info * d)80 unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
81 {
82 	struct pci_dev *dev = to_pci_dev(hwif->dev);
83 	unsigned long dma_base = 0;
84 
85 	if (hwif->host_flags & IDE_HFLAG_MMIO)
86 		return hwif->dma_base;
87 
88 	if (hwif->mate && hwif->mate->dma_base) {
89 		dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
90 	} else {
91 		u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
92 
93 		dma_base = pci_resource_start(dev, baridx);
94 
95 		if (dma_base == 0) {
96 			printk(KERN_ERR "%s %s: DMA base is invalid\n",
97 				d->name, pci_name(dev));
98 			return 0;
99 		}
100 	}
101 
102 	if (hwif->channel)
103 		dma_base += 8;
104 
105 	return dma_base;
106 }
107 EXPORT_SYMBOL_GPL(ide_pci_dma_base);
108 
ide_pci_check_simplex(ide_hwif_t * hwif,const struct ide_port_info * d)109 int ide_pci_check_simplex(ide_hwif_t *hwif, const struct ide_port_info *d)
110 {
111 	struct pci_dev *dev = to_pci_dev(hwif->dev);
112 	u8 dma_stat;
113 
114 	if (d->host_flags & (IDE_HFLAG_MMIO | IDE_HFLAG_CS5520))
115 		goto out;
116 
117 	if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) {
118 		if (ide_pci_clear_simplex(hwif->dma_base, d->name))
119 			printk(KERN_INFO "%s %s: simplex device: DMA forced\n",
120 				d->name, pci_name(dev));
121 		goto out;
122 	}
123 
124 	/*
125 	 * If the device claims "simplex" DMA, this means that only one of
126 	 * the two interfaces can be trusted with DMA at any point in time
127 	 * (so we should enable DMA only on one of the two interfaces).
128 	 *
129 	 * FIXME: At this point we haven't probed the drives so we can't make
130 	 * the appropriate decision.  Really we should defer this problem until
131 	 * we tune the drive then try to grab DMA ownership if we want to be
132 	 * the DMA end.  This has to be become dynamic to handle hot-plug.
133 	 */
134 	dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
135 	if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
136 		printk(KERN_INFO "%s %s: simplex device: DMA disabled\n",
137 			d->name, pci_name(dev));
138 		return -1;
139 	}
140 out:
141 	return 0;
142 }
143 EXPORT_SYMBOL_GPL(ide_pci_check_simplex);
144 
145 /*
146  * Set up BM-DMA capability (PnP BIOS should have done this)
147  */
ide_pci_set_master(struct pci_dev * dev,const char * name)148 int ide_pci_set_master(struct pci_dev *dev, const char *name)
149 {
150 	u16 pcicmd;
151 
152 	pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
153 
154 	if ((pcicmd & PCI_COMMAND_MASTER) == 0) {
155 		pci_set_master(dev);
156 
157 		if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) ||
158 		    (pcicmd & PCI_COMMAND_MASTER) == 0) {
159 			printk(KERN_ERR "%s %s: error updating PCICMD\n",
160 				name, pci_name(dev));
161 			return -EIO;
162 		}
163 	}
164 
165 	return 0;
166 }
167 EXPORT_SYMBOL_GPL(ide_pci_set_master);
168 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
169 
ide_setup_pci_noise(struct pci_dev * dev,const struct ide_port_info * d)170 void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
171 {
172 	printk(KERN_INFO "%s %s: IDE controller (0x%04x:0x%04x rev 0x%02x)\n",
173 		d->name, pci_name(dev),
174 		dev->vendor, dev->device, dev->revision);
175 }
176 EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
177 
178 
179 /**
180  *	ide_pci_enable	-	do PCI enables
181  *	@dev: PCI device
182  *	@d: IDE port info
183  *
184  *	Enable the IDE PCI device. We attempt to enable the device in full
185  *	but if that fails then we only need IO space. The PCI code should
186  *	have setup the proper resources for us already for controllers in
187  *	legacy mode.
188  *
189  *	Returns zero on success or an error code
190  */
191 
ide_pci_enable(struct pci_dev * dev,const struct ide_port_info * d)192 static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
193 {
194 	int ret, bars;
195 
196 	if (pci_enable_device(dev)) {
197 		ret = pci_enable_device_io(dev);
198 		if (ret < 0) {
199 			printk(KERN_WARNING "%s %s: couldn't enable device\n",
200 				d->name, pci_name(dev));
201 			goto out;
202 		}
203 		printk(KERN_WARNING "%s %s: BIOS configuration fixed\n",
204 			d->name, pci_name(dev));
205 	}
206 
207 	/*
208 	 * assume all devices can do 32-bit DMA for now, we can add
209 	 * a DMA mask field to the struct ide_port_info if we need it
210 	 * (or let lower level driver set the DMA mask)
211 	 */
212 	ret = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
213 	if (ret < 0) {
214 		printk(KERN_ERR "%s %s: can't set DMA mask\n",
215 			d->name, pci_name(dev));
216 		goto out;
217 	}
218 
219 	if (d->host_flags & IDE_HFLAG_SINGLE)
220 		bars = (1 << 2) - 1;
221 	else
222 		bars = (1 << 4) - 1;
223 
224 	if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
225 		if (d->host_flags & IDE_HFLAG_CS5520)
226 			bars |= (1 << 2);
227 		else
228 			bars |= (1 << 4);
229 	}
230 
231 	ret = pci_request_selected_regions(dev, bars, d->name);
232 	if (ret < 0)
233 		printk(KERN_ERR "%s %s: can't reserve resources\n",
234 			d->name, pci_name(dev));
235 out:
236 	return ret;
237 }
238 
239 /**
240  *	ide_pci_configure	-	configure an unconfigured device
241  *	@dev: PCI device
242  *	@d: IDE port info
243  *
244  *	Enable and configure the PCI device we have been passed.
245  *	Returns zero on success or an error code.
246  */
247 
ide_pci_configure(struct pci_dev * dev,const struct ide_port_info * d)248 static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
249 {
250 	u16 pcicmd = 0;
251 	/*
252 	 * PnP BIOS was *supposed* to have setup this device, but we
253 	 * can do it ourselves, so long as the BIOS has assigned an IRQ
254 	 * (or possibly the device is using a "legacy header" for IRQs).
255 	 * Maybe the user deliberately *disabled* the device,
256 	 * but we'll eventually ignore it again if no drives respond.
257 	 */
258 	if (ide_setup_pci_baseregs(dev, d->name) ||
259 	    pci_write_config_word(dev, PCI_COMMAND, pcicmd | PCI_COMMAND_IO)) {
260 		printk(KERN_INFO "%s %s: device disabled (BIOS)\n",
261 			d->name, pci_name(dev));
262 		return -ENODEV;
263 	}
264 	if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
265 		printk(KERN_ERR "%s %s: error accessing PCI regs\n",
266 			d->name, pci_name(dev));
267 		return -EIO;
268 	}
269 	if (!(pcicmd & PCI_COMMAND_IO)) {
270 		printk(KERN_ERR "%s %s: unable to enable IDE controller\n",
271 			d->name, pci_name(dev));
272 		return -ENXIO;
273 	}
274 	return 0;
275 }
276 
277 /**
278  *	ide_pci_check_iomem	-	check a register is I/O
279  *	@dev: PCI device
280  *	@d: IDE port info
281  *	@bar: BAR number
282  *
283  *	Checks if a BAR is configured and points to MMIO space. If so,
284  *	return an error code. Otherwise return 0
285  */
286 
ide_pci_check_iomem(struct pci_dev * dev,const struct ide_port_info * d,int bar)287 static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d,
288 			       int bar)
289 {
290 	ulong flags = pci_resource_flags(dev, bar);
291 
292 	/* Unconfigured ? */
293 	if (!flags || pci_resource_len(dev, bar) == 0)
294 		return 0;
295 
296 	/* I/O space */
297 	if (flags & IORESOURCE_IO)
298 		return 0;
299 
300 	/* Bad */
301 	return -EINVAL;
302 }
303 
304 /**
305  *	ide_hw_configure	-	configure a struct ide_hw instance
306  *	@dev: PCI device holding interface
307  *	@d: IDE port info
308  *	@port: port number
309  *	@hw: struct ide_hw instance corresponding to this port
310  *
311  *	Perform the initial set up for the hardware interface structure. This
312  *	is done per interface port rather than per PCI device. There may be
313  *	more than one port per device.
314  *
315  *	Returns zero on success or an error code.
316  */
317 
ide_hw_configure(struct pci_dev * dev,const struct ide_port_info * d,unsigned int port,struct ide_hw * hw)318 static int ide_hw_configure(struct pci_dev *dev, const struct ide_port_info *d,
319 			    unsigned int port, struct ide_hw *hw)
320 {
321 	unsigned long ctl = 0, base = 0;
322 
323 	if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
324 		if (ide_pci_check_iomem(dev, d, 2 * port) ||
325 		    ide_pci_check_iomem(dev, d, 2 * port + 1)) {
326 			printk(KERN_ERR "%s %s: I/O baseregs (BIOS) are "
327 				"reported as MEM for port %d!\n",
328 				d->name, pci_name(dev), port);
329 			return -EINVAL;
330 		}
331 
332 		ctl  = pci_resource_start(dev, 2*port+1);
333 		base = pci_resource_start(dev, 2*port);
334 	} else {
335 		/* Use default values */
336 		ctl = port ? 0x374 : 0x3f4;
337 		base = port ? 0x170 : 0x1f0;
338 	}
339 
340 	if (!base || !ctl) {
341 		printk(KERN_ERR "%s %s: bad PCI BARs for port %d, skipping\n",
342 			d->name, pci_name(dev), port);
343 		return -EINVAL;
344 	}
345 
346 	memset(hw, 0, sizeof(*hw));
347 	hw->dev = &dev->dev;
348 	ide_std_init_ports(hw, base, ctl | 2);
349 
350 	return 0;
351 }
352 
353 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
354 /**
355  *	ide_hwif_setup_dma	-	configure DMA interface
356  *	@hwif: IDE interface
357  *	@d: IDE port info
358  *
359  *	Set up the DMA base for the interface. Enable the master bits as
360  *	necessary and attempt to bring the device DMA into a ready to use
361  *	state
362  */
363 
ide_hwif_setup_dma(ide_hwif_t * hwif,const struct ide_port_info * d)364 int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
365 {
366 	struct pci_dev *dev = to_pci_dev(hwif->dev);
367 
368 	if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
369 	    ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
370 	     (dev->class & 0x80))) {
371 		unsigned long base = ide_pci_dma_base(hwif, d);
372 
373 		if (base == 0)
374 			return -1;
375 
376 		hwif->dma_base = base;
377 
378 		if (hwif->dma_ops == NULL)
379 			hwif->dma_ops = &sff_dma_ops;
380 
381 		if (ide_pci_check_simplex(hwif, d) < 0)
382 			return -1;
383 
384 		if (ide_pci_set_master(dev, d->name) < 0)
385 			return -1;
386 
387 		if (hwif->host_flags & IDE_HFLAG_MMIO)
388 			printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
389 		else
390 			printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
391 					 hwif->name, base, base + 7);
392 
393 		hwif->extra_base = base + (hwif->channel ? 8 : 16);
394 
395 		if (ide_allocate_dma_engine(hwif))
396 			return -1;
397 	}
398 
399 	return 0;
400 }
401 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
402 
403 /**
404  *	ide_setup_pci_controller	-	set up IDE PCI
405  *	@dev: PCI device
406  *	@d: IDE port info
407  *	@noisy: verbose flag
408  *
409  *	Set up the PCI and controller side of the IDE interface. This brings
410  *	up the PCI side of the device, checks that the device is enabled
411  *	and enables it if need be
412  */
413 
ide_setup_pci_controller(struct pci_dev * dev,const struct ide_port_info * d,int noisy)414 static int ide_setup_pci_controller(struct pci_dev *dev,
415 				    const struct ide_port_info *d, int noisy)
416 {
417 	int ret;
418 	u16 pcicmd;
419 
420 	if (noisy)
421 		ide_setup_pci_noise(dev, d);
422 
423 	ret = ide_pci_enable(dev, d);
424 	if (ret < 0)
425 		goto out;
426 
427 	ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
428 	if (ret < 0) {
429 		printk(KERN_ERR "%s %s: error accessing PCI regs\n",
430 			d->name, pci_name(dev));
431 		goto out;
432 	}
433 	if (!(pcicmd & PCI_COMMAND_IO)) {	/* is device disabled? */
434 		ret = ide_pci_configure(dev, d);
435 		if (ret < 0)
436 			goto out;
437 		printk(KERN_INFO "%s %s: device enabled (Linux)\n",
438 			d->name, pci_name(dev));
439 	}
440 
441 out:
442 	return ret;
443 }
444 
445 /**
446  *	ide_pci_setup_ports	-	configure ports/devices on PCI IDE
447  *	@dev: PCI device
448  *	@d: IDE port info
449  *	@hw: struct ide_hw instances corresponding to this PCI IDE device
450  *	@hws: struct ide_hw pointers table to update
451  *
452  *	Scan the interfaces attached to this device and do any
453  *	necessary per port setup. Attach the devices and ask the
454  *	generic DMA layer to do its work for us.
455  *
456  *	Normally called automaticall from do_ide_pci_setup_device,
457  *	but is also used directly as a helper function by some controllers
458  *	where the chipset setup is not the default PCI IDE one.
459  */
460 
ide_pci_setup_ports(struct pci_dev * dev,const struct ide_port_info * d,struct ide_hw * hw,struct ide_hw ** hws)461 void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d,
462 			 struct ide_hw *hw, struct ide_hw **hws)
463 {
464 	int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
465 	u8 tmp;
466 
467 	/*
468 	 * Set up the IDE ports
469 	 */
470 
471 	for (port = 0; port < channels; ++port) {
472 		const struct ide_pci_enablebit *e = &d->enablebits[port];
473 
474 		if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
475 		    (tmp & e->mask) != e->val)) {
476 			printk(KERN_INFO "%s %s: IDE port disabled\n",
477 				d->name, pci_name(dev));
478 			continue;	/* port not enabled */
479 		}
480 
481 		if (ide_hw_configure(dev, d, port, hw + port))
482 			continue;
483 
484 		*(hws + port) = hw + port;
485 	}
486 }
487 EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
488 
489 /*
490  * ide_setup_pci_device() looks at the primary/secondary interfaces
491  * on a PCI IDE device and, if they are enabled, prepares the IDE driver
492  * for use with them.  This generic code works for most PCI chipsets.
493  *
494  * One thing that is not standardized is the location of the
495  * primary/secondary interface "enable/disable" bits.  For chipsets that
496  * we "know" about, this information is in the struct ide_port_info;
497  * for all other chipsets, we just assume both interfaces are enabled.
498  */
do_ide_setup_pci_device(struct pci_dev * dev,const struct ide_port_info * d,u8 noisy)499 static int do_ide_setup_pci_device(struct pci_dev *dev,
500 				   const struct ide_port_info *d,
501 				   u8 noisy)
502 {
503 	int pciirq, ret;
504 
505 	/*
506 	 * Can we trust the reported IRQ?
507 	 */
508 	pciirq = dev->irq;
509 
510 	/*
511 	 * This allows offboard ide-pci cards the enable a BIOS,
512 	 * verify interrupt settings of split-mirror pci-config
513 	 * space, place chipset into init-mode, and/or preserve
514 	 * an interrupt if the card is not native ide support.
515 	 */
516 	ret = d->init_chipset ? d->init_chipset(dev) : 0;
517 	if (ret < 0)
518 		goto out;
519 
520 	if (ide_pci_is_in_compatibility_mode(dev)) {
521 		if (noisy)
522 			printk(KERN_INFO "%s %s: not 100%% native mode: will "
523 				"probe irqs later\n", d->name, pci_name(dev));
524 		pciirq = 0;
525 	} else if (!pciirq && noisy) {
526 		printk(KERN_WARNING "%s %s: bad irq (%d): will probe later\n",
527 			d->name, pci_name(dev), pciirq);
528 	} else if (noisy) {
529 		printk(KERN_INFO "%s %s: 100%% native mode on irq %d\n",
530 			d->name, pci_name(dev), pciirq);
531 	}
532 
533 	ret = pciirq;
534 out:
535 	return ret;
536 }
537 
ide_pci_init_two(struct pci_dev * dev1,struct pci_dev * dev2,const struct ide_port_info * d,void * priv)538 int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
539 		     const struct ide_port_info *d, void *priv)
540 {
541 	struct pci_dev *pdev[] = { dev1, dev2 };
542 	struct ide_host *host;
543 	int ret, i, n_ports = dev2 ? 4 : 2;
544 	struct ide_hw hw[4], *hws[] = { NULL, NULL, NULL, NULL };
545 
546 	for (i = 0; i < n_ports / 2; i++) {
547 		ret = ide_setup_pci_controller(pdev[i], d, !i);
548 		if (ret < 0)
549 			goto out;
550 
551 		ide_pci_setup_ports(pdev[i], d, &hw[i*2], &hws[i*2]);
552 	}
553 
554 	host = ide_host_alloc(d, hws, n_ports);
555 	if (host == NULL) {
556 		ret = -ENOMEM;
557 		goto out;
558 	}
559 
560 	host->dev[0] = &dev1->dev;
561 	if (dev2)
562 		host->dev[1] = &dev2->dev;
563 
564 	host->host_priv = priv;
565 	host->irq_flags = IRQF_SHARED;
566 
567 	pci_set_drvdata(pdev[0], host);
568 	if (dev2)
569 		pci_set_drvdata(pdev[1], host);
570 
571 	for (i = 0; i < n_ports / 2; i++) {
572 		ret = do_ide_setup_pci_device(pdev[i], d, !i);
573 
574 		/*
575 		 * FIXME: Mom, mom, they stole me the helper function to undo
576 		 * do_ide_setup_pci_device() on the first device!
577 		 */
578 		if (ret < 0)
579 			goto out;
580 
581 		/* fixup IRQ */
582 		if (ide_pci_is_in_compatibility_mode(pdev[i])) {
583 			hw[i*2].irq = pci_get_legacy_ide_irq(pdev[i], 0);
584 			hw[i*2 + 1].irq = pci_get_legacy_ide_irq(pdev[i], 1);
585 		} else
586 			hw[i*2 + 1].irq = hw[i*2].irq = ret;
587 	}
588 
589 	ret = ide_host_register(host, d, hws);
590 	if (ret)
591 		ide_host_free(host);
592 out:
593 	return ret;
594 }
595 EXPORT_SYMBOL_GPL(ide_pci_init_two);
596 
ide_pci_init_one(struct pci_dev * dev,const struct ide_port_info * d,void * priv)597 int ide_pci_init_one(struct pci_dev *dev, const struct ide_port_info *d,
598 		     void *priv)
599 {
600 	return ide_pci_init_two(dev, NULL, d, priv);
601 }
602 EXPORT_SYMBOL_GPL(ide_pci_init_one);
603 
ide_pci_remove(struct pci_dev * dev)604 void ide_pci_remove(struct pci_dev *dev)
605 {
606 	struct ide_host *host = pci_get_drvdata(dev);
607 	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
608 	int bars;
609 
610 	if (host->host_flags & IDE_HFLAG_SINGLE)
611 		bars = (1 << 2) - 1;
612 	else
613 		bars = (1 << 4) - 1;
614 
615 	if ((host->host_flags & IDE_HFLAG_NO_DMA) == 0) {
616 		if (host->host_flags & IDE_HFLAG_CS5520)
617 			bars |= (1 << 2);
618 		else
619 			bars |= (1 << 4);
620 	}
621 
622 	ide_host_remove(host);
623 
624 	if (dev2)
625 		pci_release_selected_regions(dev2, bars);
626 	pci_release_selected_regions(dev, bars);
627 
628 	if (dev2)
629 		pci_disable_device(dev2);
630 	pci_disable_device(dev);
631 }
632 EXPORT_SYMBOL_GPL(ide_pci_remove);
633 
634 #ifdef CONFIG_PM
ide_pci_suspend(struct pci_dev * dev,pm_message_t state)635 int ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
636 {
637 	pci_save_state(dev);
638 	pci_disable_device(dev);
639 	pci_set_power_state(dev, pci_choose_state(dev, state));
640 
641 	return 0;
642 }
643 EXPORT_SYMBOL_GPL(ide_pci_suspend);
644 
ide_pci_resume(struct pci_dev * dev)645 int ide_pci_resume(struct pci_dev *dev)
646 {
647 	struct ide_host *host = pci_get_drvdata(dev);
648 	int rc;
649 
650 	pci_set_power_state(dev, PCI_D0);
651 
652 	rc = pci_enable_device(dev);
653 	if (rc)
654 		return rc;
655 
656 	pci_restore_state(dev);
657 	pci_set_master(dev);
658 
659 	if (host->init_chipset)
660 		host->init_chipset(dev);
661 
662 	return 0;
663 }
664 EXPORT_SYMBOL_GPL(ide_pci_resume);
665 #endif
666