blob: 676c66e728818aac177442847d50b1d73413ef6e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/setup-pci.c Version 1.10 2002/08/19
3 *
4 * Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
5 *
6 * Copyright (c) 1995-1998 Mark Lord
7 * May be copied or modified under the terms of the GNU General Public License
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/pci.h>
14#include <linux/init.h>
15#include <linux/timer.h>
16#include <linux/mm.h>
17#include <linux/interrupt.h>
18#include <linux/ide.h>
19#include <linux/dma-mapping.h>
20
21#include <asm/io.h>
22#include <asm/irq.h>
23
24
25/**
26 * ide_match_hwif - match a PCI IDE against an ide_hwif
27 * @io_base: I/O base of device
28 * @bootable: set if its bootable
29 * @name: name of device
30 *
31 * Match a PCI IDE port against an entry in ide_hwifs[],
32 * based on io_base port if possible. Return the matching hwif,
33 * or a new hwif. If we find an error (clashing, out of devices, etc)
34 * return NULL
35 *
36 * FIXME: we need to handle mmio matches here too
37 */
38
39static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
40{
41 int h;
42 ide_hwif_t *hwif;
43
44 /*
45 * Look for a hwif with matching io_base specified using
46 * parameters to ide_setup().
47 */
48 for (h = 0; h < MAX_HWIFS; ++h) {
49 hwif = &ide_hwifs[h];
50 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
51 if (hwif->chipset == ide_forced)
52 return hwif; /* a perfect match */
53 }
54 }
55 /*
56 * Look for a hwif with matching io_base default value.
57 * If chipset is "ide_unknown", then claim that hwif slot.
58 * Otherwise, some other chipset has already claimed it.. :(
59 */
60 for (h = 0; h < MAX_HWIFS; ++h) {
61 hwif = &ide_hwifs[h];
62 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
63 if (hwif->chipset == ide_unknown)
64 return hwif; /* match */
65 printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
66 name, io_base, hwif->name);
67 return NULL; /* already claimed */
68 }
69 }
70 /*
71 * Okay, there is no hwif matching our io_base,
72 * so we'll just claim an unassigned slot.
73 * Give preference to claiming other slots before claiming ide0/ide1,
74 * just in case there's another interface yet-to-be-scanned
75 * which uses ports 1f0/170 (the ide0/ide1 defaults).
76 *
77 * Unless there is a bootable card that does not use the standard
78 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
79 */
80 if (bootable) {
81 for (h = 0; h < MAX_HWIFS; ++h) {
82 hwif = &ide_hwifs[h];
83 if (hwif->chipset == ide_unknown)
84 return hwif; /* pick an unused entry */
85 }
86 } else {
87 for (h = 2; h < MAX_HWIFS; ++h) {
88 hwif = ide_hwifs + h;
89 if (hwif->chipset == ide_unknown)
90 return hwif; /* pick an unused entry */
91 }
92 }
Matt Mackall83d7dbc2006-10-03 01:14:16 -070093 for (h = 0; h < 2 && h < MAX_HWIFS; ++h) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 hwif = ide_hwifs + h;
95 if (hwif->chipset == ide_unknown)
96 return hwif; /* pick an unused entry */
97 }
98 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
99 return NULL;
100}
101
102/**
103 * ide_setup_pci_baseregs - place a PCI IDE controller native
104 * @dev: PCI device of interface to switch native
105 * @name: Name of interface
106 *
107 * We attempt to place the PCI interface into PCI native mode. If
108 * we succeed the BARs are ok and the controller is in PCI mode.
109 * Returns 0 on success or an errno code.
110 *
111 * FIXME: if we program the interface and then fail to set the BARS
112 * we don't switch it back to legacy mode. Do we actually care ??
113 */
114
115static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
116{
117 u8 progif = 0;
118
119 /*
120 * Place both IDE interfaces into PCI "native" mode:
121 */
122 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
123 (progif & 5) != 5) {
124 if ((progif & 0xa) != 0xa) {
125 printk(KERN_INFO "%s: device not capable of full "
126 "native PCI mode\n", name);
127 return -EOPNOTSUPP;
128 }
129 printk("%s: placing both ports into native PCI mode\n", name);
130 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
131 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
132 (progif & 5) != 5) {
133 printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
134 "0x%04x, got 0x%04x\n",
135 name, progif|5, progif);
136 return -EOPNOTSUPP;
137 }
138 }
139 return 0;
140}
141
142#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143/**
144 * ide_get_or_set_dma_base - setup BMIBA
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200145 * @d: IDE port info
146 * @hwif: IDE interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 *
Bartlomiej Zolnierkiewiczc58e79d2007-10-16 22:29:56 +0200148 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
149 * Where a device has a partner that is already in DMA mode we check
150 * and enforce IDE simplex rules.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 */
152
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200153static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
155 unsigned long dma_base = 0;
156 struct pci_dev *dev = hwif->pci_dev;
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (hwif->mmio)
159 return hwif->dma_base;
160
161 if (hwif->mate && hwif->mate->dma_base) {
162 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
163 } else {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200164 u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
165
166 dma_base = pci_resource_start(dev, baridx);
167
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100168 if (dma_base == 0) {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200169 printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100170 return 0;
171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
173
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100174 if (hwif->channel)
175 dma_base += 8;
176
177 if ((d->host_flags & IDE_HFLAG_CS5520) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 u8 simplex_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 switch(dev->device) {
181 case PCI_DEVICE_ID_AL_M5219:
182 case PCI_DEVICE_ID_AL_M5229:
183 case PCI_DEVICE_ID_AMD_VIPER_7409:
184 case PCI_DEVICE_ID_CMD_643:
185 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
Matt Gillette2f09a7f2005-08-18 22:27:07 +0200186 case PCI_DEVICE_ID_REVOLUTION:
Bartlomiej Zolnierkiewicz31e8a462007-10-19 00:30:08 +0200187 simplex_stat = inb(dma_base + 2);
188 outb(simplex_stat & 0x60, dma_base + 2);
189 simplex_stat = inb(dma_base + 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (simplex_stat & 0x80) {
191 printk(KERN_INFO "%s: simplex device: "
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200192 "DMA forced\n",
193 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 }
195 break;
196 default:
197 /*
198 * If the device claims "simplex" DMA,
199 * this means only one of the two interfaces
200 * can be trusted with DMA at any point in time.
201 * So we should enable DMA only on one of the
202 * two interfaces.
203 */
204 simplex_stat = hwif->INB(dma_base + 2);
205 if (simplex_stat & 0x80) {
206 /* simplex device? */
207/*
208 * At this point we haven't probed the drives so we can't make the
209 * appropriate decision. Really we should defer this problem
210 * until we tune the drive then try to grab DMA ownership if we want
211 * to be the DMA end. This has to be become dynamic to handle hot
212 * plug.
213 */
214 if (hwif->mate && hwif->mate->dma_base) {
215 printk(KERN_INFO "%s: simplex device: "
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200216 "DMA disabled\n",
217 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 dma_base = 0;
219 }
220 }
221 }
222 }
223 return dma_base;
224}
225#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
226
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200227void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Bartlomiej Zolnierkiewiczbde07e52007-10-20 00:32:36 +0200229 printk(KERN_INFO "%s: IDE controller (0x%04x:0x%04x rev 0x%02x) at "
230 " PCI slot %s\n", d->name, dev->vendor, dev->device,
231 dev->revision, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
233
234EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
235
236
237/**
238 * ide_pci_enable - do PCI enables
239 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200240 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 *
242 * Enable the IDE PCI device. We attempt to enable the device in full
243 * but if that fails then we only need BAR4 so we will enable that.
244 *
245 * Returns zero on success or an error code
246 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200247
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200248static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
250 int ret;
251
252 if (pci_enable_device(dev)) {
253 ret = pci_enable_device_bars(dev, 1 << 4);
254 if (ret < 0) {
255 printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
256 "Could not enable device.\n", d->name);
257 goto out;
258 }
259 printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
260 }
261
262 /*
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200263 * assume all devices can do 32-bit DMA for now, we can add
264 * a DMA mask field to the struct ide_port_info if we need it
265 * (or let lower level driver set the DMA mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 */
267 ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
268 if (ret < 0) {
269 printk(KERN_ERR "%s: can't set dma mask\n", d->name);
270 goto out;
271 }
272
273 /* FIXME: Temporary - until we put in the hotplug interface logic
274 Check that the bits we want are not in use by someone else. */
275 ret = pci_request_region(dev, 4, "ide_tmp");
276 if (ret < 0)
277 goto out;
278
279 pci_release_region(dev, 4);
280out:
281 return ret;
282}
283
284/**
285 * ide_pci_configure - configure an unconfigured device
286 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200287 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 *
289 * Enable and configure the PCI device we have been passed.
290 * Returns zero on success or an error code.
291 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200292
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200293static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
295 u16 pcicmd = 0;
296 /*
297 * PnP BIOS was *supposed* to have setup this device, but we
298 * can do it ourselves, so long as the BIOS has assigned an IRQ
299 * (or possibly the device is using a "legacy header" for IRQs).
300 * Maybe the user deliberately *disabled* the device,
301 * but we'll eventually ignore it again if no drives respond.
302 */
303 if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO))
304 {
305 printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
306 return -ENODEV;
307 }
308 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
309 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
310 return -EIO;
311 }
312 if (!(pcicmd & PCI_COMMAND_IO)) {
313 printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
314 return -ENXIO;
315 }
316 return 0;
317}
318
319/**
320 * ide_pci_check_iomem - check a register is I/O
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200321 * @dev: PCI device
322 * @d: IDE port info
323 * @bar: BAR number
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 *
325 * Checks if a BAR is configured and points to MMIO space. If so
326 * print an error and return an error code. Otherwise return 0
327 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200328
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200329static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d, int bar)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 ulong flags = pci_resource_flags(dev, bar);
332
333 /* Unconfigured ? */
334 if (!flags || pci_resource_len(dev, bar) == 0)
335 return 0;
336
337 /* I/O space */
338 if(flags & PCI_BASE_ADDRESS_IO_MASK)
339 return 0;
340
341 /* Bad */
342 printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
343 "as MEM, report to "
344 "<andre@linux-ide.org>.\n", d->name);
345 return -EINVAL;
346}
347
348/**
349 * ide_hwif_configure - configure an IDE interface
350 * @dev: PCI device holding interface
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200351 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 * @mate: Paired interface if any
353 *
354 * Perform the initial set up for the hardware interface structure. This
355 * is done per interface port rather than per PCI device. There may be
356 * more than one port per device.
357 *
358 * Returns the new hardware interface structure, or NULL on a failure
359 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200360
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200361static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *mate, int port, int irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
363 unsigned long ctl = 0, base = 0;
364 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz7cab14a2007-10-19 00:30:06 +0200365 u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100366 u8 oldnoprobe = 0;
367 struct hw_regs_s hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200369 if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 /* Possibly we should fail if these checks report true */
371 ide_pci_check_iomem(dev, d, 2*port);
372 ide_pci_check_iomem(dev, d, 2*port+1);
373
374 ctl = pci_resource_start(dev, 2*port+1);
375 base = pci_resource_start(dev, 2*port);
376 if ((ctl && !base) || (base && !ctl)) {
377 printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
378 "for port %d, skipping\n", d->name, port);
379 return NULL;
380 }
381 }
382 if (!ctl)
383 {
384 /* Use default values */
385 ctl = port ? 0x374 : 0x3f4;
386 base = port ? 0x170 : 0x1f0;
387 }
Bartlomiej Zolnierkiewicz7cab14a2007-10-19 00:30:06 +0200388 if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return NULL; /* no room in ide_hwifs[] */
Bartlomiej Zolnierkiewicz9239b332007-10-20 00:32:33 +0200390
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100391 memset(&hw, 0, sizeof(hw));
392 hw.irq = hwif->irq ? hwif->irq : irq;
393 hw.dev = &dev->dev;
394 hw.chipset = d->chipset ? d->chipset : ide_pci;
395 ide_std_init_ports(&hw, base, ctl | 2);
396
397 if (hwif->io_ports[IDE_DATA_OFFSET] == base &&
398 hwif->io_ports[IDE_CONTROL_OFFSET] == (ctl | 2))
399 oldnoprobe = hwif->noprobe;
400
401 ide_init_port_hw(hwif, &hw);
402
403 hwif->noprobe = oldnoprobe;
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 hwif->pci_dev = dev;
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200406 hwif->cds = d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 hwif->channel = port;
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (mate) {
410 hwif->mate = mate;
411 mate->mate = hwif;
412 }
413 return hwif;
414}
415
416/**
417 * ide_hwif_setup_dma - configure DMA interface
418 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200419 * @d: IDE port info
420 * @hwif: IDE interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 *
422 * Set up the DMA base for the interface. Enable the master bits as
423 * necessary and attempt to bring the device DMA into a ready to use
424 * state
425 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200426
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200427static void ide_hwif_setup_dma(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200429#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 u16 pcicmd;
Bartlomiej Zolnierkiewicz47b68782007-10-19 00:30:06 +0200431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
433
Bartlomiej Zolnierkiewicz47b68782007-10-19 00:30:06 +0200434 if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
436 (dev->class & 0x80))) {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200437 unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
439 /*
440 * Set up BM-DMA capability
441 * (PnP BIOS should have done this)
442 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 pci_set_master(dev);
444 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
445 printk(KERN_ERR "%s: %s error updating PCICMD\n",
446 hwif->name, d->name);
447 dma_base = 0;
448 }
449 }
450 if (dma_base) {
451 if (d->init_dma) {
452 d->init_dma(hwif, dma_base);
453 } else {
454 ide_setup_dma(hwif, dma_base, 8);
455 }
456 } else {
457 printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
458 "(BIOS)\n", hwif->name, d->name);
459 }
460 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200462}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464/**
465 * ide_setup_pci_controller - set up IDE PCI
466 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200467 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 * @noisy: verbose flag
469 * @config: returned as 1 if we configured the hardware
470 *
471 * Set up the PCI and controller side of the IDE interface. This brings
472 * up the PCI side of the device, checks that the device is enabled
473 * and enables it if need be
474 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200475
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200476static int ide_setup_pci_controller(struct pci_dev *dev, const struct ide_port_info *d, int noisy, int *config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
478 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 u16 pcicmd;
480
481 if (noisy)
482 ide_setup_pci_noise(dev, d);
483
484 ret = ide_pci_enable(dev, d);
485 if (ret < 0)
486 goto out;
487
488 ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
489 if (ret < 0) {
490 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
491 goto out;
492 }
493 if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */
494 ret = ide_pci_configure(dev, d);
495 if (ret < 0)
496 goto out;
497 *config = 1;
498 printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
499 }
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501out:
502 return ret;
503}
504
505/**
506 * ide_pci_setup_ports - configure ports/devices on PCI IDE
507 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200508 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 * @pciirq: IRQ line
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200510 * @idx: ATA index table to update
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 *
512 * Scan the interfaces attached to this device and do any
513 * necessary per port setup. Attach the devices and ask the
514 * generic DMA layer to do its work for us.
515 *
516 * Normally called automaticall from do_ide_pci_setup_device,
517 * but is also used directly as a helper function by some controllers
518 * where the chipset setup is not the default PCI IDE one.
519 */
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200520
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200521void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200523 int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 ide_hwif_t *hwif, *mate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 u8 tmp;
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 /*
528 * Set up the IDE ports
529 */
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200530
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200531 for (port = 0; port < channels; ++port) {
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200532 const ide_pci_enablebit_t *e = &(d->enablebits[port]);
533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200535 (tmp & e->mask) != e->val)) {
536 printk(KERN_INFO "%s: IDE port disabled\n", d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 continue; /* port not enabled */
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200538 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
541 continue;
542
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200543 *(idx + port) = hwif->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 if (d->init_iops)
546 d->init_iops(hwif);
547
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200548 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 ide_hwif_setup_dma(dev, d, hwif);
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200550
Bartlomiej Zolnierkiewicz8acf28c2007-10-20 00:32:30 +0200551 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
552 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
Bartlomiej Zolnierkiewicz3985ee32007-10-19 00:30:11 +0200553 hwif->irq = port ? 15 : 14;
554
Bartlomiej Zolnierkiewicz6a824c92007-07-20 01:11:58 +0200555 hwif->host_flags = d->host_flags;
Bartlomiej Zolnierkiewicz4099d142007-07-20 01:11:59 +0200556 hwif->pio_mask = d->pio_mask;
Bartlomiej Zolnierkiewicz6a824c92007-07-20 01:11:58 +0200557
Bartlomiej Zolnierkiewicz1c513612007-10-19 00:30:10 +0200558 if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
559 hwif->mate->serialized = hwif->serialized = 1;
560
Bartlomiej Zolnierkiewiczcaea7602007-10-20 00:32:30 +0200561 if (d->host_flags & IDE_HFLAG_IO_32BIT) {
562 hwif->drives[0].io_32bit = 1;
563 hwif->drives[1].io_32bit = 1;
564 }
565
566 if (d->host_flags & IDE_HFLAG_UNMASK_IRQS) {
567 hwif->drives[0].unmask = 1;
568 hwif->drives[1].unmask = 1;
569 }
570
Bartlomiej Zolnierkiewicz5f8b6c32007-10-19 00:30:07 +0200571 if (hwif->dma_base) {
572 hwif->swdma_mask = d->swdma_mask;
573 hwif->mwdma_mask = d->mwdma_mask;
574 hwif->ultra_mask = d->udma_mask;
575 }
576
Bartlomiej Zolnierkiewicz85ad93a2007-10-19 00:30:12 +0200577 hwif->drives[0].autotune = 1;
578 hwif->drives[1].autotune = 1;
579
Bartlomiej Zolnierkiewicz272a3702007-10-20 00:32:30 +0200580 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
581 hwif->rqsize = 256;
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (d->init_hwif)
584 /* Call chipset-specific routine
585 * for each enabled hwif
586 */
587 d->init_hwif(hwif);
588
589 mate = hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591}
592
593EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
594
595/*
596 * ide_setup_pci_device() looks at the primary/secondary interfaces
597 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
598 * for use with them. This generic code works for most PCI chipsets.
599 *
600 * One thing that is not standardized is the location of the
601 * primary/secondary interface "enable/disable" bits. For chipsets that
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200602 * we "know" about, this information is in the struct ide_port_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 * for all other chipsets, we just assume both interfaces are enabled.
604 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200605static int do_ide_setup_pci_device(struct pci_dev *dev,
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200606 const struct ide_port_info *d,
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200607 u8 *idx, u8 noisy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 int tried_config = 0;
610 int pciirq, ret;
611
612 ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
613 if (ret < 0)
614 goto out;
615
616 /*
617 * Can we trust the reported IRQ?
618 */
619 pciirq = dev->irq;
620
621 /* Is it an "IDE storage" device in non-PCI mode? */
622 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
623 if (noisy)
624 printk(KERN_INFO "%s: not 100%% native mode: "
625 "will probe irqs later\n", d->name);
626 /*
627 * This allows offboard ide-pci cards the enable a BIOS,
628 * verify interrupt settings of split-mirror pci-config
629 * space, place chipset into init-mode, and/or preserve
630 * an interrupt if the card is not native ide support.
631 */
632 ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
633 if (ret < 0)
634 goto out;
635 pciirq = ret;
636 } else if (tried_config) {
637 if (noisy)
638 printk(KERN_INFO "%s: will probe irqs later\n", d->name);
639 pciirq = 0;
640 } else if (!pciirq) {
641 if (noisy)
642 printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
643 d->name, pciirq);
644 pciirq = 0;
645 } else {
646 if (d->init_chipset) {
647 ret = d->init_chipset(dev, d->name);
648 if (ret < 0)
649 goto out;
650 }
651 if (noisy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
653 d->name, pciirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 }
655
656 /* FIXME: silent failure can happen */
657
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200658 ide_pci_setup_ports(dev, d, pciirq, idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659out:
660 return ret;
661}
662
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200663int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664{
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200665 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 int ret;
667
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200668 ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200670 if (ret >= 0)
671 ide_device_add(idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 return ret;
674}
675
676EXPORT_SYMBOL_GPL(ide_setup_pci_device);
677
678int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200679 const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
681 struct pci_dev *pdev[] = { dev1, dev2 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 int ret, i;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200683 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685 for (i = 0; i < 2; i++) {
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200686 ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 /*
688 * FIXME: Mom, mom, they stole me the helper function to undo
689 * do_ide_setup_pci_device() on the first device!
690 */
691 if (ret < 0)
692 goto out;
693 }
694
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200695 ide_device_add(idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696out:
697 return ret;
698}
699
700EXPORT_SYMBOL_GPL(ide_setup_pci_devices);