Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/kernel/bios32.c | |
3 | * | |
4 | * PCI bios-type initialisation for PCI machines | |
5 | * | |
6 | * Bits taken from various places. | |
7 | */ | |
ecea4ab6 | 8 | #include <linux/export.h> |
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/pci.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/init.h> | |
fced80c7 | 13 | #include <linux/io.h> |
1da177e4 | 14 | |
1da177e4 | 15 | #include <asm/mach-types.h> |
c2794437 | 16 | #include <asm/mach/map.h> |
1da177e4 LT |
17 | #include <asm/mach/pci.h> |
18 | ||
19 | static int debug_pci; | |
b3a72384 GP |
20 | static resource_size_t (*align_resource)(struct pci_dev *dev, |
21 | const struct resource *res, | |
22 | resource_size_t start, | |
23 | resource_size_t size, | |
24 | resource_size_t align) = NULL; | |
1da177e4 LT |
25 | |
26 | /* | |
5ee09efe | 27 | * We can't use pci_get_device() here since we are |
1da177e4 LT |
28 | * called from interrupt context. |
29 | */ | |
30 | static void pcibios_bus_report_status(struct pci_bus *bus, u_int status_mask, int warn) | |
31 | { | |
32 | struct pci_dev *dev; | |
33 | ||
34 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
35 | u16 status; | |
36 | ||
37 | /* | |
38 | * ignore host bridge - we handle | |
39 | * that separately | |
40 | */ | |
41 | if (dev->bus->number == 0 && dev->devfn == 0) | |
42 | continue; | |
43 | ||
44 | pci_read_config_word(dev, PCI_STATUS, &status); | |
45 | if (status == 0xffff) | |
46 | continue; | |
47 | ||
48 | if ((status & status_mask) == 0) | |
49 | continue; | |
50 | ||
51 | /* clear the status errors */ | |
52 | pci_write_config_word(dev, PCI_STATUS, status & status_mask); | |
53 | ||
54 | if (warn) | |
55 | printk("(%s: %04X) ", pci_name(dev), status); | |
56 | } | |
57 | ||
58 | list_for_each_entry(dev, &bus->devices, bus_list) | |
59 | if (dev->subordinate) | |
60 | pcibios_bus_report_status(dev->subordinate, status_mask, warn); | |
61 | } | |
62 | ||
63 | void pcibios_report_status(u_int status_mask, int warn) | |
64 | { | |
f0197e0c | 65 | struct pci_bus *bus; |
1da177e4 | 66 | |
f0197e0c | 67 | list_for_each_entry(bus, &pci_root_buses, node) |
1da177e4 | 68 | pcibios_bus_report_status(bus, status_mask, warn); |
1da177e4 LT |
69 | } |
70 | ||
71 | /* | |
72 | * We don't use this to fix the device, but initialisation of it. | |
73 | * It's not the correct use for this, but it works. | |
74 | * Note that the arbiter/ISA bridge appears to be buggy, specifically in | |
75 | * the following area: | |
76 | * 1. park on CPU | |
77 | * 2. ISA bridge ping-pong | |
78 | * 3. ISA bridge master handling of target RETRY | |
79 | * | |
80 | * Bug 3 is responsible for the sound DMA grinding to a halt. We now | |
81 | * live with bug 2. | |
82 | */ | |
351a102d | 83 | static void pci_fixup_83c553(struct pci_dev *dev) |
1da177e4 LT |
84 | { |
85 | /* | |
86 | * Set memory region to start at address 0, and enable IO | |
87 | */ | |
88 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_SPACE_MEMORY); | |
89 | pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO); | |
90 | ||
91 | dev->resource[0].end -= dev->resource[0].start; | |
92 | dev->resource[0].start = 0; | |
93 | ||
94 | /* | |
95 | * All memory requests from ISA to be channelled to PCI | |
96 | */ | |
97 | pci_write_config_byte(dev, 0x48, 0xff); | |
98 | ||
99 | /* | |
100 | * Enable ping-pong on bus master to ISA bridge transactions. | |
101 | * This improves the sound DMA substantially. The fixed | |
102 | * priority arbiter also helps (see below). | |
103 | */ | |
104 | pci_write_config_byte(dev, 0x42, 0x01); | |
105 | ||
106 | /* | |
107 | * Enable PCI retry | |
108 | */ | |
109 | pci_write_config_byte(dev, 0x40, 0x22); | |
110 | ||
111 | /* | |
112 | * We used to set the arbiter to "park on last master" (bit | |
113 | * 1 set), but unfortunately the CyberPro does not park the | |
114 | * bus. We must therefore park on CPU. Unfortunately, this | |
115 | * may trigger yet another bug in the 553. | |
116 | */ | |
117 | pci_write_config_byte(dev, 0x83, 0x02); | |
118 | ||
119 | /* | |
120 | * Make the ISA DMA request lowest priority, and disable | |
121 | * rotating priorities completely. | |
122 | */ | |
123 | pci_write_config_byte(dev, 0x80, 0x11); | |
124 | pci_write_config_byte(dev, 0x81, 0x00); | |
125 | ||
126 | /* | |
127 | * Route INTA input to IRQ 11, and set IRQ11 to be level | |
128 | * sensitive. | |
129 | */ | |
130 | pci_write_config_word(dev, 0x44, 0xb000); | |
131 | outb(0x08, 0x4d1); | |
132 | } | |
133 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_83C553, pci_fixup_83c553); | |
134 | ||
351a102d | 135 | static void pci_fixup_unassign(struct pci_dev *dev) |
1da177e4 LT |
136 | { |
137 | dev->resource[0].end -= dev->resource[0].start; | |
138 | dev->resource[0].start = 0; | |
139 | } | |
140 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_89C940F, pci_fixup_unassign); | |
141 | ||
142 | /* | |
143 | * Prevent the PCI layer from seeing the resources allocated to this device | |
144 | * if it is the host bridge by marking it as such. These resources are of | |
145 | * no consequence to the PCI layer (they are handled elsewhere). | |
146 | */ | |
351a102d | 147 | static void pci_fixup_dec21285(struct pci_dev *dev) |
1da177e4 LT |
148 | { |
149 | int i; | |
150 | ||
151 | if (dev->devfn == 0) { | |
152 | dev->class &= 0xff; | |
153 | dev->class |= PCI_CLASS_BRIDGE_HOST << 8; | |
154 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
155 | dev->resource[i].start = 0; | |
156 | dev->resource[i].end = 0; | |
157 | dev->resource[i].flags = 0; | |
158 | } | |
159 | } | |
160 | } | |
161 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, pci_fixup_dec21285); | |
162 | ||
1da177e4 LT |
163 | /* |
164 | * PCI IDE controllers use non-standard I/O port decoding, respect it. | |
165 | */ | |
351a102d | 166 | static void pci_fixup_ide_bases(struct pci_dev *dev) |
1da177e4 LT |
167 | { |
168 | struct resource *r; | |
169 | int i; | |
170 | ||
171 | if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) | |
172 | return; | |
173 | ||
174 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
175 | r = dev->resource + i; | |
176 | if ((r->start & ~0x80) == 0x374) { | |
177 | r->start |= 2; | |
178 | r->end = r->start; | |
179 | } | |
180 | } | |
181 | } | |
182 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases); | |
183 | ||
184 | /* | |
185 | * Put the DEC21142 to sleep | |
186 | */ | |
351a102d | 187 | static void pci_fixup_dec21142(struct pci_dev *dev) |
1da177e4 LT |
188 | { |
189 | pci_write_config_dword(dev, 0x40, 0x80000000); | |
190 | } | |
191 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142, pci_fixup_dec21142); | |
192 | ||
193 | /* | |
194 | * The CY82C693 needs some rather major fixups to ensure that it does | |
195 | * the right thing. Idea from the Alpha people, with a few additions. | |
196 | * | |
197 | * We ensure that the IDE base registers are set to 1f0/3f4 for the | |
198 | * primary bus, and 170/374 for the secondary bus. Also, hide them | |
199 | * from the PCI subsystem view as well so we won't try to perform | |
200 | * our own auto-configuration on them. | |
201 | * | |
202 | * In addition, we ensure that the PCI IDE interrupts are routed to | |
203 | * IRQ 14 and IRQ 15 respectively. | |
204 | * | |
205 | * The above gets us to a point where the IDE on this device is | |
206 | * functional. However, The CY82C693U _does not work_ in bus | |
207 | * master mode without locking the PCI bus solid. | |
208 | */ | |
351a102d | 209 | static void pci_fixup_cy82c693(struct pci_dev *dev) |
1da177e4 LT |
210 | { |
211 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) { | |
212 | u32 base0, base1; | |
213 | ||
214 | if (dev->class & 0x80) { /* primary */ | |
215 | base0 = 0x1f0; | |
216 | base1 = 0x3f4; | |
217 | } else { /* secondary */ | |
218 | base0 = 0x170; | |
219 | base1 = 0x374; | |
220 | } | |
221 | ||
222 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, | |
223 | base0 | PCI_BASE_ADDRESS_SPACE_IO); | |
224 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, | |
225 | base1 | PCI_BASE_ADDRESS_SPACE_IO); | |
226 | ||
227 | dev->resource[0].start = 0; | |
228 | dev->resource[0].end = 0; | |
229 | dev->resource[0].flags = 0; | |
230 | ||
231 | dev->resource[1].start = 0; | |
232 | dev->resource[1].end = 0; | |
233 | dev->resource[1].flags = 0; | |
234 | } else if (PCI_FUNC(dev->devfn) == 0) { | |
235 | /* | |
236 | * Setup IDE IRQ routing. | |
237 | */ | |
238 | pci_write_config_byte(dev, 0x4b, 14); | |
239 | pci_write_config_byte(dev, 0x4c, 15); | |
240 | ||
241 | /* | |
242 | * Disable FREQACK handshake, enable USB. | |
243 | */ | |
244 | pci_write_config_byte(dev, 0x4d, 0x41); | |
245 | ||
246 | /* | |
247 | * Enable PCI retry, and PCI post-write buffer. | |
248 | */ | |
249 | pci_write_config_byte(dev, 0x44, 0x17); | |
250 | ||
251 | /* | |
252 | * Enable ISA master and DMA post write buffering. | |
253 | */ | |
254 | pci_write_config_byte(dev, 0x45, 0x03); | |
255 | } | |
256 | } | |
257 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693, pci_fixup_cy82c693); | |
258 | ||
351a102d | 259 | static void pci_fixup_it8152(struct pci_dev *dev) |
a8fc0789 MR |
260 | { |
261 | int i; | |
262 | /* fixup for ITE 8152 devices */ | |
263 | /* FIXME: add defines for class 0x68000 and 0x80103 */ | |
264 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST || | |
265 | dev->class == 0x68000 || | |
266 | dev->class == 0x80103) { | |
267 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
268 | dev->resource[i].start = 0; | |
269 | dev->resource[i].end = 0; | |
270 | dev->resource[i].flags = 0; | |
271 | } | |
272 | } | |
273 | } | |
274 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8152, pci_fixup_it8152); | |
275 | ||
1da177e4 LT |
276 | /* |
277 | * If the bus contains any of these devices, then we must not turn on | |
278 | * parity checking of any kind. Currently this is CyberPro 20x0 only. | |
279 | */ | |
280 | static inline int pdev_bad_for_parity(struct pci_dev *dev) | |
281 | { | |
a8fc0789 MR |
282 | return ((dev->vendor == PCI_VENDOR_ID_INTERG && |
283 | (dev->device == PCI_DEVICE_ID_INTERG_2000 || | |
284 | dev->device == PCI_DEVICE_ID_INTERG_2010)) || | |
285 | (dev->vendor == PCI_VENDOR_ID_ITE && | |
286 | dev->device == PCI_DEVICE_ID_ITE_8152)); | |
287 | ||
1da177e4 LT |
288 | } |
289 | ||
1da177e4 LT |
290 | /* |
291 | * pcibios_fixup_bus - Called after each bus is probed, | |
292 | * but before its children are examined. | |
293 | */ | |
46edfc54 | 294 | void pcibios_fixup_bus(struct pci_bus *bus) |
1da177e4 | 295 | { |
1da177e4 LT |
296 | struct pci_dev *dev; |
297 | u16 features = PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_FAST_BACK; | |
298 | ||
1da177e4 LT |
299 | /* |
300 | * Walk the devices on this bus, working out what we can | |
301 | * and can't support. | |
302 | */ | |
303 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
304 | u16 status; | |
305 | ||
1da177e4 LT |
306 | pci_read_config_word(dev, PCI_STATUS, &status); |
307 | ||
308 | /* | |
309 | * If any device on this bus does not support fast back | |
310 | * to back transfers, then the bus as a whole is not able | |
311 | * to support them. Having fast back to back transfers | |
312 | * on saves us one PCI cycle per transaction. | |
313 | */ | |
314 | if (!(status & PCI_STATUS_FAST_BACK)) | |
315 | features &= ~PCI_COMMAND_FAST_BACK; | |
316 | ||
317 | if (pdev_bad_for_parity(dev)) | |
318 | features &= ~(PCI_COMMAND_SERR | PCI_COMMAND_PARITY); | |
319 | ||
320 | switch (dev->class >> 8) { | |
1da177e4 LT |
321 | case PCI_CLASS_BRIDGE_PCI: |
322 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &status); | |
323 | status |= PCI_BRIDGE_CTL_PARITY|PCI_BRIDGE_CTL_MASTER_ABORT; | |
324 | status &= ~(PCI_BRIDGE_CTL_BUS_RESET|PCI_BRIDGE_CTL_FAST_BACK); | |
325 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, status); | |
326 | break; | |
327 | ||
328 | case PCI_CLASS_BRIDGE_CARDBUS: | |
329 | pci_read_config_word(dev, PCI_CB_BRIDGE_CONTROL, &status); | |
330 | status |= PCI_CB_BRIDGE_CTL_PARITY|PCI_CB_BRIDGE_CTL_MASTER_ABORT; | |
331 | pci_write_config_word(dev, PCI_CB_BRIDGE_CONTROL, status); | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | /* | |
337 | * Now walk the devices again, this time setting them up. | |
338 | */ | |
339 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
340 | u16 cmd; | |
341 | ||
342 | pci_read_config_word(dev, PCI_COMMAND, &cmd); | |
343 | cmd |= features; | |
344 | pci_write_config_word(dev, PCI_COMMAND, cmd); | |
345 | ||
346 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, | |
347 | L1_CACHE_BYTES >> 2); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Propagate the flags to the PCI bridge. | |
352 | */ | |
353 | if (bus->self && bus->self->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
354 | if (features & PCI_COMMAND_FAST_BACK) | |
355 | bus->bridge_ctl |= PCI_BRIDGE_CTL_FAST_BACK; | |
356 | if (features & PCI_COMMAND_PARITY) | |
357 | bus->bridge_ctl |= PCI_BRIDGE_CTL_PARITY; | |
358 | } | |
359 | ||
360 | /* | |
361 | * Report what we did for this bus | |
362 | */ | |
4ed89f22 | 363 | pr_info("PCI: bus%d: Fast back to back transfers %sabled\n", |
1da177e4 LT |
364 | bus->number, (features & PCI_COMMAND_FAST_BACK) ? "en" : "dis"); |
365 | } | |
b214bea5 | 366 | EXPORT_SYMBOL(pcibios_fixup_bus); |
1da177e4 | 367 | |
1da177e4 | 368 | /* |
daeb4c0c RK |
369 | * Swizzle the device pin each time we cross a bridge. If a platform does |
370 | * not provide a swizzle function, we perform the standard PCI swizzling. | |
371 | * | |
372 | * The default swizzling walks up the bus tree one level at a time, applying | |
373 | * the standard swizzle function at each step, stopping when it finds the PCI | |
374 | * root bus. This will return the slot number of the bridge device on the | |
375 | * root bus and the interrupt pin on that device which should correspond | |
376 | * with the downstream device interrupt. | |
377 | * | |
378 | * Platforms may override this, in which case the slot and pin returned | |
379 | * depend entirely on the platform code. However, please note that the | |
380 | * PCI standard swizzle is implemented on plug-in cards and Cardbus based | |
381 | * PCI extenders, so it can not be ignored. | |
1da177e4 | 382 | */ |
351a102d | 383 | static u8 pcibios_swizzle(struct pci_dev *dev, u8 *pin) |
1da177e4 LT |
384 | { |
385 | struct pci_sys_data *sys = dev->sysdata; | |
daeb4c0c | 386 | int slot, oldpin = *pin; |
1da177e4 LT |
387 | |
388 | if (sys->swizzle) | |
389 | slot = sys->swizzle(dev, pin); | |
daeb4c0c RK |
390 | else |
391 | slot = pci_common_swizzle(dev, pin); | |
1da177e4 LT |
392 | |
393 | if (debug_pci) | |
394 | printk("PCI: %s swizzling pin %d => pin %d slot %d\n", | |
395 | pci_name(dev), oldpin, *pin, slot); | |
396 | ||
397 | return slot; | |
398 | } | |
399 | ||
400 | /* | |
401 | * Map a slot/pin to an IRQ. | |
402 | */ | |
d5341942 | 403 | static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
1da177e4 LT |
404 | { |
405 | struct pci_sys_data *sys = dev->sysdata; | |
406 | int irq = -1; | |
407 | ||
408 | if (sys->map_irq) | |
409 | irq = sys->map_irq(dev, slot, pin); | |
410 | ||
411 | if (debug_pci) | |
412 | printk("PCI: %s mapping slot %d pin %d => irq %d\n", | |
413 | pci_name(dev), slot, pin, irq); | |
414 | ||
415 | return irq; | |
416 | } | |
417 | ||
276fd3c5 | 418 | static int pcibios_init_resources(int busnr, struct pci_sys_data *sys) |
3c5d1699 RH |
419 | { |
420 | int ret; | |
14d76b68 | 421 | struct resource_entry *window; |
3c5d1699 RH |
422 | |
423 | if (list_empty(&sys->resources)) { | |
424 | pci_add_resource_offset(&sys->resources, | |
425 | &iomem_resource, sys->mem_offset); | |
426 | } | |
427 | ||
14d76b68 | 428 | resource_list_for_each_entry(window, &sys->resources) |
3c5d1699 RH |
429 | if (resource_type(window->res) == IORESOURCE_IO) |
430 | return 0; | |
3c5d1699 RH |
431 | |
432 | sys->io_res.start = (busnr * SZ_64K) ? : pcibios_min_io; | |
433 | sys->io_res.end = (busnr + 1) * SZ_64K - 1; | |
434 | sys->io_res.flags = IORESOURCE_IO; | |
435 | sys->io_res.name = sys->io_res_name; | |
436 | sprintf(sys->io_res_name, "PCI%d I/O", busnr); | |
437 | ||
438 | ret = request_resource(&ioport_resource, &sys->io_res); | |
439 | if (ret) { | |
440 | pr_err("PCI: unable to allocate I/O port region (%d)\n", ret); | |
441 | return ret; | |
442 | } | |
443 | pci_add_resource_offset(&sys->resources, &sys->io_res, | |
444 | sys->io_offset); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
14d86e72 LW |
449 | static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, |
450 | struct list_head *head) | |
1da177e4 LT |
451 | { |
452 | struct pci_sys_data *sys = NULL; | |
453 | int ret; | |
454 | int nr, busnr; | |
455 | ||
456 | for (nr = busnr = 0; nr < hw->nr_controllers; nr++) { | |
d2a02b93 | 457 | sys = kzalloc(sizeof(struct pci_sys_data), GFP_KERNEL); |
ada8b675 LP |
458 | if (WARN(!sys, "PCI: unable to allocate sys data!")) |
459 | break; | |
1da177e4 | 460 | |
1da177e4 LT |
461 | sys->busnr = busnr; |
462 | sys->swizzle = hw->swizzle; | |
463 | sys->map_irq = hw->map_irq; | |
b3a72384 | 464 | align_resource = hw->align_resource; |
37d15909 | 465 | INIT_LIST_HEAD(&sys->resources); |
1da177e4 | 466 | |
352af7d4 TR |
467 | if (hw->private_data) |
468 | sys->private_data = hw->private_data[nr]; | |
469 | ||
1da177e4 LT |
470 | ret = hw->setup(nr, sys); |
471 | ||
472 | if (ret > 0) { | |
3c5d1699 RH |
473 | ret = pcibios_init_resources(nr, sys); |
474 | if (ret) { | |
475 | kfree(sys); | |
476 | break; | |
37d15909 BH |
477 | } |
478 | ||
c23bfc38 RK |
479 | if (hw->scan) |
480 | sys->bus = hw->scan(nr, sys); | |
481 | else | |
8953aab1 LP |
482 | sys->bus = pci_scan_root_bus_msi(parent, |
483 | sys->busnr, hw->ops, sys, | |
484 | &sys->resources, hw->msi_ctrl); | |
1da177e4 | 485 | |
ada8b675 LP |
486 | if (WARN(!sys->bus, "PCI: unable to scan bus!")) { |
487 | kfree(sys); | |
488 | break; | |
489 | } | |
1da177e4 | 490 | |
b918c62e | 491 | busnr = sys->bus->busn_res.end + 1; |
1da177e4 | 492 | |
90cf2418 | 493 | list_add(&sys->node, head); |
1da177e4 LT |
494 | } else { |
495 | kfree(sys); | |
496 | if (ret < 0) | |
497 | break; | |
498 | } | |
499 | } | |
500 | } | |
501 | ||
14d86e72 | 502 | void pci_common_init_dev(struct device *parent, struct hw_pci *hw) |
1da177e4 LT |
503 | { |
504 | struct pci_sys_data *sys; | |
90cf2418 | 505 | LIST_HEAD(head); |
1da177e4 | 506 | |
6696cbc3 | 507 | pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
1da177e4 LT |
508 | if (hw->preinit) |
509 | hw->preinit(); | |
14d86e72 | 510 | pcibios_init_hw(parent, hw, &head); |
1da177e4 LT |
511 | if (hw->postinit) |
512 | hw->postinit(); | |
513 | ||
514 | pci_fixup_irqs(pcibios_swizzle, pcibios_map_irq); | |
515 | ||
90cf2418 | 516 | list_for_each_entry(sys, &head, node) { |
1da177e4 LT |
517 | struct pci_bus *bus = sys->bus; |
518 | ||
a4fab044 | 519 | if (!pci_has_flag(PCI_PROBE_ONLY)) { |
808b27a5 MK |
520 | struct pci_bus *child; |
521 | ||
1da177e4 LT |
522 | /* |
523 | * Size the bridge windows. | |
524 | */ | |
525 | pci_bus_size_bridges(bus); | |
526 | ||
527 | /* | |
528 | * Assign resources. | |
529 | */ | |
530 | pci_bus_assign_resources(bus); | |
1da177e4 | 531 | |
808b27a5 MK |
532 | list_for_each_entry(child, &bus->children, node) |
533 | pcie_bus_configure_settings(child); | |
534 | } | |
1da177e4 LT |
535 | /* |
536 | * Tell drivers about devices found. | |
537 | */ | |
538 | pci_bus_add_devices(bus); | |
539 | } | |
540 | } | |
541 | ||
168c8619 MS |
542 | #ifndef CONFIG_PCI_HOST_ITE8152 |
543 | void pcibios_set_master(struct pci_dev *dev) | |
544 | { | |
545 | /* No special bus mastering setup handling */ | |
546 | } | |
547 | #endif | |
548 | ||
1da177e4 LT |
549 | char * __init pcibios_setup(char *str) |
550 | { | |
551 | if (!strcmp(str, "debug")) { | |
552 | debug_pci = 1; | |
553 | return NULL; | |
554 | } else if (!strcmp(str, "firmware")) { | |
a4fab044 | 555 | pci_add_flags(PCI_PROBE_ONLY); |
1da177e4 LT |
556 | return NULL; |
557 | } | |
558 | return str; | |
559 | } | |
560 | ||
561 | /* | |
562 | * From arch/i386/kernel/pci-i386.c: | |
563 | * | |
564 | * We need to avoid collisions with `mirrored' VGA ports | |
565 | * and other strange ISA hardware, so we always want the | |
566 | * addresses to be allocated in the 0x000-0x0ff region | |
567 | * modulo 0x400. | |
568 | * | |
569 | * Why? Because some silly external IO cards only decode | |
570 | * the low 10 bits of the IO address. The 0x00-0xff region | |
571 | * is reserved for motherboard devices that decode all 16 | |
572 | * bits, so it's ok to allocate at, say, 0x2800-0x28ff, | |
573 | * but we want to try to avoid allocating at 0x2900-0x2bff | |
574 | * which might be mirrored at 0x0100-0x03ff.. | |
575 | */ | |
3b7a17fc | 576 | resource_size_t pcibios_align_resource(void *data, const struct resource *res, |
b26b2d49 | 577 | resource_size_t size, resource_size_t align) |
1da177e4 | 578 | { |
029baf14 | 579 | struct pci_dev *dev = data; |
e31dd6e4 | 580 | resource_size_t start = res->start; |
1da177e4 LT |
581 | |
582 | if (res->flags & IORESOURCE_IO && start & 0x300) | |
583 | start = (start + 0x3ff) & ~0x3ff; | |
584 | ||
b26b2d49 DB |
585 | start = (start + align - 1) & ~(align - 1); |
586 | ||
b3a72384 GP |
587 | if (align_resource) |
588 | return align_resource(dev, res, start, size, align); | |
029baf14 | 589 | |
b26b2d49 | 590 | return start; |
1da177e4 LT |
591 | } |
592 | ||
593 | /** | |
594 | * pcibios_enable_device - Enable I/O and memory. | |
595 | * @dev: PCI device to be enabled | |
596 | */ | |
597 | int pcibios_enable_device(struct pci_dev *dev, int mask) | |
598 | { | |
27e8efdb WD |
599 | if (pci_has_flag(PCI_PROBE_ONLY)) |
600 | return 0; | |
1da177e4 | 601 | |
27e8efdb | 602 | return pci_enable_resources(dev, mask); |
1da177e4 LT |
603 | } |
604 | ||
605 | int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, | |
606 | enum pci_mmap_state mmap_state, int write_combine) | |
607 | { | |
415ae101 | 608 | if (mmap_state == pci_mmap_io) |
1da177e4 | 609 | return -EINVAL; |
1da177e4 LT |
610 | |
611 | /* | |
612 | * Mark this as IO | |
613 | */ | |
1da177e4 LT |
614 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
615 | ||
415ae101 | 616 | if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, |
1da177e4 LT |
617 | vma->vm_end - vma->vm_start, |
618 | vma->vm_page_prot)) | |
619 | return -EAGAIN; | |
620 | ||
621 | return 0; | |
622 | } | |
c2794437 RH |
623 | |
624 | void __init pci_map_io_early(unsigned long pfn) | |
625 | { | |
626 | struct map_desc pci_io_desc = { | |
627 | .virtual = PCI_IO_VIRT_BASE, | |
628 | .type = MT_DEVICE, | |
629 | .length = SZ_64K, | |
630 | }; | |
631 | ||
632 | pci_io_desc.pfn = pfn; | |
633 | iotable_init(&pci_io_desc, 1); | |
634 | } |