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