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: &new_option->list, head: &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, offset: 0x800);
64 quirk_awe32_add_ports(dev, option, offset: 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(dst: 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: &new_option->list, head: &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, set: i);
189 if (!new_option)
190 return;
191
192 set = pnp_option_set(option: new_option);
193 while (new_option && pnp_option_set(option: 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, option: 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
229static void quirk_system_pci_resources(struct pnp_dev *dev)
230{
231 struct pci_dev *pdev = NULL;
232 struct resource *res, *r;
233 int i, j;
234
235 /*
236 * Some BIOSes have PNP motherboard devices with resources that
237 * partially overlap PCI BARs. The PNP system driver claims these
238 * motherboard resources, which prevents the normal PCI driver from
239 * requesting them later.
240 *
241 * This patch disables the PNP resources that conflict with PCI BARs
242 * so they won't be claimed by the PNP system driver.
243 */
244 for_each_pci_dev(pdev) {
245 pci_dev_for_each_resource(pdev, r, i) {
246 unsigned long type = resource_type(res: r);
247
248 if (!(type == IORESOURCE_IO || type == IORESOURCE_MEM) ||
249 resource_size(res: r) == 0)
250 continue;
251
252 if (r->flags & IORESOURCE_UNSET)
253 continue;
254
255 for (j = 0;
256 (res = pnp_get_resource(dev, type, num: j)); j++) {
257 if (res->start == 0 && res->end == 0)
258 continue;
259
260 /*
261 * If the PNP region doesn't overlap the PCI
262 * region at all, there's no problem.
263 */
264 if (!resource_overlaps(r1: res, r2: r))
265 continue;
266
267 /*
268 * If the PNP region completely encloses (or is
269 * at least as large as) the PCI region, that's
270 * also OK. For example, this happens when the
271 * PNP device describes a bridge with PCI
272 * behind it.
273 */
274 if (res->start <= r->start && res->end >= r->end)
275 continue;
276
277 /*
278 * Otherwise, the PNP region overlaps *part* of
279 * the PCI region, and that might prevent a PCI
280 * driver from requesting its resources.
281 */
282 dev_warn(&dev->dev,
283 "disabling %pR because it overlaps %s BAR %d %pR\n",
284 res, pci_name(pdev), i, r);
285 res->flags |= IORESOURCE_DISABLED;
286 }
287 }
288 }
289}
290
291#ifdef CONFIG_AMD_NB
292
293#include <asm/amd/nb.h>
294
295static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
296{
297 resource_size_t start, end;
298 struct pnp_resource *pnp_res;
299 struct resource *res;
300 struct resource mmconfig_res, *mmconfig;
301
302 mmconfig = amd_get_mmconfig_range(res: &mmconfig_res);
303 if (!mmconfig)
304 return;
305
306 list_for_each_entry(pnp_res, &dev->resources, list) {
307 res = &pnp_res->res;
308 if (res->end < mmconfig->start || res->start > mmconfig->end ||
309 (res->start == mmconfig->start && res->end == mmconfig->end))
310 continue;
311
312 dev_info(&dev->dev, FW_BUG
313 "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
314 res, mmconfig);
315 if (mmconfig->start < res->start) {
316 start = mmconfig->start;
317 end = res->start - 1;
318 pnp_add_mem_resource(dev, start, end, flags: 0);
319 }
320 if (mmconfig->end > res->end) {
321 start = res->end + 1;
322 end = mmconfig->end;
323 pnp_add_mem_resource(dev, start, end, flags: 0);
324 }
325 break;
326 }
327}
328#endif
329
330#ifdef CONFIG_PCI
331/* Device IDs of parts that have 32KB MCH space */
332static const unsigned int mch_quirk_devices[] = {
333 0x0154, /* Ivy Bridge */
334 0x0a04, /* Haswell-ULT */
335 0x0c00, /* Haswell */
336 0x1604, /* Broadwell */
337};
338
339static struct pci_dev *get_intel_host(void)
340{
341 int i;
342 struct pci_dev *host;
343
344 for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) {
345 host = pci_get_device(PCI_VENDOR_ID_INTEL, device: mch_quirk_devices[i],
346 NULL);
347 if (host)
348 return host;
349 }
350 return NULL;
351}
352
353static void quirk_intel_mch(struct pnp_dev *dev)
354{
355 struct pci_dev *host;
356 u32 addr_lo, addr_hi;
357 struct pci_bus_region region;
358 struct resource mch;
359 struct pnp_resource *pnp_res;
360 struct resource *res;
361
362 host = get_intel_host();
363 if (!host)
364 return;
365
366 /*
367 * MCHBAR is not an architected PCI BAR, so MCH space is usually
368 * reported as a PNP0C02 resource. The MCH space was originally
369 * 16KB, but is 32KB in newer parts. Some BIOSes still report a
370 * PNP0C02 resource that is only 16KB, which means the rest of the
371 * MCH space is consumed but unreported.
372 */
373
374 /*
375 * Read MCHBAR for Host Member Mapped Register Range Base
376 * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet
377 * Sec 3.1.12.
378 */
379 pci_read_config_dword(dev: host, where: 0x48, val: &addr_lo);
380 region.start = addr_lo & ~0x7fff;
381 pci_read_config_dword(dev: host, where: 0x4c, val: &addr_hi);
382 region.start |= (u64) addr_hi << 32;
383 region.end = region.start + 32*1024 - 1;
384
385 memset(s: &mch, c: 0, n: sizeof(mch));
386 mch.flags = IORESOURCE_MEM;
387 pcibios_bus_to_resource(bus: host->bus, res: &mch, region: &region);
388
389 list_for_each_entry(pnp_res, &dev->resources, list) {
390 res = &pnp_res->res;
391 if (res->end < mch.start || res->start > mch.end)
392 continue; /* no overlap */
393 if (res->start == mch.start && res->end == mch.end)
394 continue; /* exact match */
395
396 dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
397 res, pci_name(host), &mch);
398 res->start = mch.start;
399 res->end = mch.end;
400 break;
401 }
402
403 pci_dev_put(dev: host);
404}
405#endif
406
407/*
408 * PnP Quirks
409 * Cards or devices that need some tweaking due to incomplete resource info
410 */
411
412static struct pnp_fixup pnp_fixups[] = {
413 /* Soundblaster awe io port quirk */
414 {"CTL0021", quirk_awe32_resources},
415 {.id: "CTL0022", .quirk_function: quirk_awe32_resources},
416 {.id: "CTL0023", .quirk_function: quirk_awe32_resources},
417 /* CMI 8330 interrupt and dma fix */
418 {.id: "@X@0001", .quirk_function: quirk_cmi8330_resources},
419 /* Soundblaster audio device io port range quirk */
420 {.id: "CTL0001", .quirk_function: quirk_sb16audio_resources},
421 {.id: "CTL0031", .quirk_function: quirk_sb16audio_resources},
422 {.id: "CTL0041", .quirk_function: quirk_sb16audio_resources},
423 {.id: "CTL0042", .quirk_function: quirk_sb16audio_resources},
424 {.id: "CTL0043", .quirk_function: quirk_sb16audio_resources},
425 {.id: "CTL0044", .quirk_function: quirk_sb16audio_resources},
426 {.id: "CTL0045", .quirk_function: quirk_sb16audio_resources},
427 /* Add IRQ-optional MPU options */
428 {.id: "ADS7151", .quirk_function: quirk_ad1815_mpu_resources},
429 {.id: "ADS7181", .quirk_function: quirk_add_irq_optional_dependent_sets},
430 {.id: "AZT0002", .quirk_function: quirk_add_irq_optional_dependent_sets},
431 /* PnP resources that might overlap PCI BARs */
432 {.id: "PNP0c01", .quirk_function: quirk_system_pci_resources},
433 {.id: "PNP0c02", .quirk_function: quirk_system_pci_resources},
434#ifdef CONFIG_AMD_NB
435 {.id: "PNP0c01", .quirk_function: quirk_amd_mmconfig_area},
436#endif
437#ifdef CONFIG_PCI
438 {.id: "PNP0c02", .quirk_function: quirk_intel_mch},
439#endif
440 {.id: ""}
441};
442
443void pnp_fixup_device(struct pnp_dev *dev)
444{
445 struct pnp_fixup *f;
446
447 for (f = pnp_fixups; *f->id; f++) {
448 if (!compare_pnp_id(pos: dev->id, id: f->id))
449 continue;
450 pnp_dbg(&dev->dev, "%s: calling %pS\n", f->id,
451 f->quirk_function);
452 f->quirk_function(dev);
453 }
454}
455