1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains quirk handling code for PnP devices
4 * Some devices do not report all their resources, and need to have extra
5 * resources added. This is most easily accomplished at initialisation time
6 * when building up the resource structure for the first time.
7 *
8 * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
9 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
10 * Bjorn Helgaas <bjorn.helgaas@hp.com>
11 *
12 * Heavily based on PCI quirks handling which is
13 *
14 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
15 */
16
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/pci.h>
20#include <linux/string.h>
21#include <linux/slab.h>
22#include <linux/pnp.h>
23#include <linux/io.h>
24#include "base.h"
25
26static void quirk_awe32_add_ports(struct pnp_dev *dev,
27 struct pnp_option *option,
28 unsigned int offset)
29{
30 struct pnp_option *new_option;
31
32 new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
33 if (!new_option) {
34 dev_err(&dev->dev, "couldn't add ioport region to option set "
35 "%d\n", pnp_option_set(option));
36 return;
37 }
38
39 *new_option = *option;
40 new_option->u.port.min += offset;
41 new_option->u.port.max += offset;
42 list_add(&new_option->list, &option->list);
43
44 dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
45 (unsigned long long) new_option->u.port.min,
46 (unsigned long long) new_option->u.port.max,
47 pnp_option_set(option));
48}
49
50static void quirk_awe32_resources(struct pnp_dev *dev)
51{
52 struct pnp_option *option;
53 unsigned int set = ~0;
54
55 /*
56 * Add two extra ioport regions (at offset 0x400 and 0x800 from the
57 * one given) to every dependent option set.
58 */
59 list_for_each_entry(option, &dev->options, list) {
60 if (pnp_option_is_dependent(option) &&
61 pnp_option_set(option) != set) {
62 set = pnp_option_set(option);
63 quirk_awe32_add_ports(dev, option, 0x800);
64 quirk_awe32_add_ports(dev, option, 0x400);
65 }
66 }
67}
68
69static void quirk_cmi8330_resources(struct pnp_dev *dev)
70{
71 struct pnp_option *option;
72 struct pnp_irq *irq;
73 struct pnp_dma *dma;
74
75 list_for_each_entry(option, &dev->options, list) {
76 if (!pnp_option_is_dependent(option))
77 continue;
78
79 if (option->type == IORESOURCE_IRQ) {
80 irq = &option->u.irq;
81 bitmap_zero(irq->map.bits, PNP_IRQ_NR);
82 __set_bit(5, irq->map.bits);
83 __set_bit(7, irq->map.bits);
84 __set_bit(10, irq->map.bits);
85 dev_info(&dev->dev, "set possible IRQs in "
86 "option set %d to 5, 7, 10\n",
87 pnp_option_set(option));
88 } else if (option->type == IORESOURCE_DMA) {
89 dma = &option->u.dma;
90 if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
91 IORESOURCE_DMA_8BIT &&
92 dma->map != 0x0A) {
93 dev_info(&dev->dev, "changing possible "
94 "DMA channel mask in option set %d "
95 "from %#02x to 0x0A (1, 3)\n",
96 pnp_option_set(option), dma->map);
97 dma->map = 0x0A;
98 }
99 }
100 }
101}
102
103static void quirk_sb16audio_resources(struct pnp_dev *dev)
104{
105 struct pnp_option *option;
106 unsigned int prev_option_flags = ~0, n = 0;
107 struct pnp_port *port;
108
109 /*
110 * The default range on the OPL port for these devices is 0x388-0x388.
111 * Here we increase that range so that two such cards can be
112 * auto-configured.
113 */
114 list_for_each_entry(option, &dev->options, list) {
115 if (prev_option_flags != option->flags) {
116 prev_option_flags = option->flags;
117 n = 0;
118 }
119
120 if (pnp_option_is_dependent(option) &&
121 option->type == IORESOURCE_IO) {
122 n++;
123 port = &option->u.port;
124 if (n == 3 && port->min == port->max) {
125 port->max += 0x70;
126 dev_info(&dev->dev, "increased option port "
127 "range from %#llx-%#llx to "
128 "%#llx-%#llx\n",
129 (unsigned long long) port->min,
130 (unsigned long long) port->min,
131 (unsigned long long) port->min,
132 (unsigned long long) port->max);
133 }
134 }
135 }
136}
137
138static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
139 unsigned int set)
140{
141 struct pnp_option *tail = NULL, *first_new_option = NULL;
142 struct pnp_option *option, *new_option;
143 unsigned int flags;
144
145 list_for_each_entry(option, &dev->options, list) {
146 if (pnp_option_is_dependent(option))
147 tail = option;
148 }
149 if (!tail) {
150 dev_err(&dev->dev, "no dependent option sets\n");
151 return NULL;
152 }
153
154 flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
155 list_for_each_entry(option, &dev->options, list) {
156 if (pnp_option_is_dependent(option) &&
157 pnp_option_set(option) == set) {
158 new_option = kmalloc(sizeof(struct pnp_option),
159 GFP_KERNEL);
160 if (!new_option) {
161 dev_err(&dev->dev, "couldn't clone dependent "
162 "set %d\n", set);
163 return NULL;
164 }
165
166 *new_option = *option;
167 new_option->flags = flags;
168 if (!first_new_option)
169 first_new_option = new_option;
170
171 list_add(&new_option->list, &tail->list);
172 tail = new_option;
173 }
174 }
175
176 return first_new_option;
177}
178
179
180static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
181{
182 struct pnp_option *new_option;
183 unsigned int num_sets, i, set;
184 struct pnp_irq *irq;
185
186 num_sets = dev->num_dependent_sets;
187 for (i = 0; i < num_sets; i++) {
188 new_option = pnp_clone_dependent_set(dev, i);
189 if (!new_option)
190 return;
191
192 set = pnp_option_set(new_option);
193 while (new_option && pnp_option_set(new_option) == set) {
194 if (new_option->type == IORESOURCE_IRQ) {
195 irq = &new_option->u.irq;
196 irq->flags |= IORESOURCE_IRQ_OPTIONAL;
197 }
198 dbg_pnp_show_option(dev, new_option);
199 new_option = list_entry(new_option->list.next,
200 struct pnp_option, list);
201 }
202
203 dev_info(&dev->dev, "added dependent option set %d (same as "
204 "set %d except IRQ optional)\n", set, i);
205 }
206}
207
208static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
209{
210 struct pnp_option *option;
211 struct pnp_irq *irq = NULL;
212 unsigned int independent_irqs = 0;
213
214 list_for_each_entry(option, &dev->options, list) {
215 if (option->type == IORESOURCE_IRQ &&
216 !pnp_option_is_dependent(option)) {
217 independent_irqs++;
218 irq = &option->u.irq;
219 }
220 }
221
222 if (independent_irqs != 1)
223 return;
224
225 irq->flags |= IORESOURCE_IRQ_OPTIONAL;
226 dev_info(&dev->dev, "made independent IRQ optional\n");
227}
228
229#include <linux/pci.h>
230
231static void quirk_system_pci_resources(struct pnp_dev *dev)
232{
233 struct pci_dev *pdev = NULL;
234 struct resource *res;
235 resource_size_t pnp_start, pnp_end, pci_start, pci_end;
236 int i, j;
237
238 /*
239 * Some BIOSes have PNP motherboard devices with resources that
240 * partially overlap PCI BARs. The PNP system driver claims these
241 * motherboard resources, which prevents the normal PCI driver from
242 * requesting them later.
243 *
244 * This patch disables the PNP resources that conflict with PCI BARs
245 * so they won't be claimed by the PNP system driver.
246 */
247 for_each_pci_dev(pdev) {
248 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
249 unsigned long flags, type;
250
251 flags = pci_resource_flags(pdev, i);
252 type = flags & (IORESOURCE_IO | IORESOURCE_MEM);
253 if (!type || pci_resource_len(pdev, i) == 0)
254 continue;
255
256 if (flags & IORESOURCE_UNSET)
257 continue;
258
259 pci_start = pci_resource_start(pdev, i);
260 pci_end = pci_resource_end(pdev, i);
261 for (j = 0;
262 (res = pnp_get_resource(dev, type, j)); j++) {
263 if (res->start == 0 && res->end == 0)
264 continue;
265
266 pnp_start = res->start;
267 pnp_end = res->end;
268
269 /*
270 * If the PNP region doesn't overlap the PCI
271 * region at all, there's no problem.
272 */
273 if (pnp_end < pci_start || pnp_start > pci_end)
274 continue;
275
276 /*
277 * If the PNP region completely encloses (or is
278 * at least as large as) the PCI region, that's
279 * also OK. For example, this happens when the
280 * PNP device describes a bridge with PCI
281 * behind it.
282 */
283 if (pnp_start <= pci_start &&
284 pnp_end >= pci_end)
285 continue;
286
287 /*
288 * Otherwise, the PNP region overlaps *part* of
289 * the PCI region, and that might prevent a PCI
290 * driver from requesting its resources.
291 */
292 dev_warn(&dev->dev,
293 "disabling %pR because it overlaps "
294 "%s BAR %d %pR\n", res,
295 pci_name(pdev), i, &pdev->resource[i]);
296 res->flags |= IORESOURCE_DISABLED;
297 }
298 }
299 }
300}
301
302#ifdef CONFIG_AMD_NB
303
304#include <asm/amd_nb.h>
305
306static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
307{
308 resource_size_t start, end;
309 struct pnp_resource *pnp_res;
310 struct resource *res;
311 struct resource mmconfig_res, *mmconfig;
312
313 mmconfig = amd_get_mmconfig_range(&mmconfig_res);
314 if (!mmconfig)
315 return;
316
317 list_for_each_entry(pnp_res, &dev->resources, list) {
318 res = &pnp_res->res;
319 if (res->end < mmconfig->start || res->start > mmconfig->end ||
320 (res->start == mmconfig->start && res->end == mmconfig->end))
321 continue;
322
323 dev_info(&dev->dev, FW_BUG
324 "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
325 res, mmconfig);
326 if (mmconfig->start < res->start) {
327 start = mmconfig->start;
328 end = res->start - 1;
329 pnp_add_mem_resource(dev, start, end, 0);
330 }
331 if (mmconfig->end > res->end) {
332 start = res->end + 1;
333 end = mmconfig->end;
334 pnp_add_mem_resource(dev, start, end, 0);
335 }
336 break;
337 }
338}
339#endif
340
341#ifdef CONFIG_PCI
342/* Device IDs of parts that have 32KB MCH space */
343static const unsigned int mch_quirk_devices[] = {
344 0x0154, /* Ivy Bridge */
345 0x0a04, /* Haswell-ULT */
346 0x0c00, /* Haswell */
347 0x1604, /* Broadwell */
348};
349
350static struct pci_dev *get_intel_host(void)
351{
352 int i;
353 struct pci_dev *host;
354
355 for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) {
356 host = pci_get_device(PCI_VENDOR_ID_INTEL, mch_quirk_devices[i],
357 NULL);
358 if (host)
359 return host;
360 }
361 return NULL;
362}
363
364static void quirk_intel_mch(struct pnp_dev *dev)
365{
366 struct pci_dev *host;
367 u32 addr_lo, addr_hi;
368 struct pci_bus_region region;
369 struct resource mch;
370 struct pnp_resource *pnp_res;
371 struct resource *res;
372
373 host = get_intel_host();
374 if (!host)
375 return;
376
377 /*
378 * MCHBAR is not an architected PCI BAR, so MCH space is usually
379 * reported as a PNP0C02 resource. The MCH space was originally
380 * 16KB, but is 32KB in newer parts. Some BIOSes still report a
381 * PNP0C02 resource that is only 16KB, which means the rest of the
382 * MCH space is consumed but unreported.
383 */
384
385 /*
386 * Read MCHBAR for Host Member Mapped Register Range Base
387 * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet
388 * Sec 3.1.12.
389 */
390 pci_read_config_dword(host, 0x48, &addr_lo);
391 region.start = addr_lo & ~0x7fff;
392 pci_read_config_dword(host, 0x4c, &addr_hi);
393 region.start |= (u64) addr_hi << 32;
394 region.end = region.start + 32*1024 - 1;
395
396 memset(&mch, 0, sizeof(mch));
397 mch.flags = IORESOURCE_MEM;
398 pcibios_bus_to_resource(host->bus, &mch, &region);
399
400 list_for_each_entry(pnp_res, &dev->resources, list) {
401 res = &pnp_res->res;
402 if (res->end < mch.start || res->start > mch.end)
403 continue; /* no overlap */
404 if (res->start == mch.start && res->end == mch.end)
405 continue; /* exact match */
406
407 dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
408 res, pci_name(host), &mch);
409 res->start = mch.start;
410 res->end = mch.end;
411 break;
412 }
413
414 pci_dev_put(host);
415}
416#endif
417
418/*
419 * PnP Quirks
420 * Cards or devices that need some tweaking due to incomplete resource info
421 */
422
423static struct pnp_fixup pnp_fixups[] = {
424 /* Soundblaster awe io port quirk */
425 {"CTL0021", quirk_awe32_resources},
426 {"CTL0022", quirk_awe32_resources},
427 {"CTL0023", quirk_awe32_resources},
428 /* CMI 8330 interrupt and dma fix */
429 {"@X@0001", quirk_cmi8330_resources},
430 /* Soundblaster audio device io port range quirk */
431 {"CTL0001", quirk_sb16audio_resources},
432 {"CTL0031", quirk_sb16audio_resources},
433 {"CTL0041", quirk_sb16audio_resources},
434 {"CTL0042", quirk_sb16audio_resources},
435 {"CTL0043", quirk_sb16audio_resources},
436 {"CTL0044", quirk_sb16audio_resources},
437 {"CTL0045", quirk_sb16audio_resources},
438 /* Add IRQ-optional MPU options */
439 {"ADS7151", quirk_ad1815_mpu_resources},
440 {"ADS7181", quirk_add_irq_optional_dependent_sets},
441 {"AZT0002", quirk_add_irq_optional_dependent_sets},
442 /* PnP resources that might overlap PCI BARs */
443 {"PNP0c01", quirk_system_pci_resources},
444 {"PNP0c02", quirk_system_pci_resources},
445#ifdef CONFIG_AMD_NB
446 {"PNP0c01", quirk_amd_mmconfig_area},
447#endif
448#ifdef CONFIG_PCI
449 {"PNP0c02", quirk_intel_mch},
450#endif
451 {""}
452};
453
454void pnp_fixup_device(struct pnp_dev *dev)
455{
456 struct pnp_fixup *f;
457
458 for (f = pnp_fixups; *f->id; f++) {
459 if (!compare_pnp_id(dev->id, f->id))
460 continue;
461 pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
462 f->quirk_function);
463 f->quirk_function(dev);
464 }
465}
466