xref: /openbmc/linux/drivers/pnp/quirks.c (revision 63dc02bd) 
1 /*
2  *  This file contains quirk handling code for PnP devices
3  *  Some devices do not report all their resources, and need to have extra
4  *  resources added. This is most easily accomplished at initialisation time
5  *  when building up the resource structure for the first time.
6  *
7  *  Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
8  *  Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
9  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
10  *
11  *  Heavily based on PCI quirks handling which is
12  *
13  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
14  */
15 
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/slab.h>
20 #include <linux/pnp.h>
21 #include <linux/io.h>
22 #include <linux/kallsyms.h>
23 #include "base.h"
24 
25 static void quirk_awe32_add_ports(struct pnp_dev *dev,
26 				  struct pnp_option *option,
27 				  unsigned int offset)
28 {
29 	struct pnp_option *new_option;
30 
31 	new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
32 	if (!new_option) {
33 		dev_err(&dev->dev, "couldn't add ioport region to option set "
34 			"%d\n", pnp_option_set(option));
35 		return;
36 	}
37 
38 	*new_option = *option;
39 	new_option->u.port.min += offset;
40 	new_option->u.port.max += offset;
41 	list_add(&new_option->list, &option->list);
42 
43 	dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
44 		(unsigned long long) new_option->u.port.min,
45 		(unsigned long long) new_option->u.port.max,
46 		pnp_option_set(option));
47 }
48 
49 static void quirk_awe32_resources(struct pnp_dev *dev)
50 {
51 	struct pnp_option *option;
52 	unsigned int set = ~0;
53 
54 	/*
55 	 * Add two extra ioport regions (at offset 0x400 and 0x800 from the
56 	 * one given) to every dependent option set.
57 	 */
58 	list_for_each_entry(option, &dev->options, list) {
59 		if (pnp_option_is_dependent(option) &&
60 		    pnp_option_set(option) != set) {
61 			set = pnp_option_set(option);
62 			quirk_awe32_add_ports(dev, option, 0x800);
63 			quirk_awe32_add_ports(dev, option, 0x400);
64 		}
65 	}
66 }
67 
68 static void quirk_cmi8330_resources(struct pnp_dev *dev)
69 {
70 	struct pnp_option *option;
71 	struct pnp_irq *irq;
72 	struct pnp_dma *dma;
73 
74 	list_for_each_entry(option, &dev->options, list) {
75 		if (!pnp_option_is_dependent(option))
76 			continue;
77 
78 		if (option->type == IORESOURCE_IRQ) {
79 			irq = &option->u.irq;
80 			bitmap_zero(irq->map.bits, PNP_IRQ_NR);
81 			__set_bit(5, irq->map.bits);
82 			__set_bit(7, irq->map.bits);
83 			__set_bit(10, irq->map.bits);
84 			dev_info(&dev->dev, "set possible IRQs in "
85 				 "option set %d to 5, 7, 10\n",
86 				 pnp_option_set(option));
87 		} else if (option->type == IORESOURCE_DMA) {
88 			dma = &option->u.dma;
89 			if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
90 						IORESOURCE_DMA_8BIT &&
91 			    dma->map != 0x0A) {
92 				dev_info(&dev->dev, "changing possible "
93 					 "DMA channel mask in option set %d "
94 					 "from %#02x to 0x0A (1, 3)\n",
95 					 pnp_option_set(option), dma->map);
96 				dma->map = 0x0A;
97 			}
98 		}
99 	}
100 }
101 
102 static void quirk_sb16audio_resources(struct pnp_dev *dev)
103 {
104 	struct pnp_option *option;
105 	unsigned int prev_option_flags = ~0, n = 0;
106 	struct pnp_port *port;
107 
108 	/*
109 	 * The default range on the OPL port for these devices is 0x388-0x388.
110 	 * Here we increase that range so that two such cards can be
111 	 * auto-configured.
112 	 */
113 	list_for_each_entry(option, &dev->options, list) {
114 		if (prev_option_flags != option->flags) {
115 			prev_option_flags = option->flags;
116 			n = 0;
117 		}
118 
119 		if (pnp_option_is_dependent(option) &&
120 		    option->type == IORESOURCE_IO) {
121 			n++;
122 			port = &option->u.port;
123 			if (n == 3 && port->min == port->max) {
124 				port->max += 0x70;
125 				dev_info(&dev->dev, "increased option port "
126 					 "range from %#llx-%#llx to "
127 					 "%#llx-%#llx\n",
128 					 (unsigned long long) port->min,
129 					 (unsigned long long) port->min,
130 					 (unsigned long long) port->min,
131 					 (unsigned long long) port->max);
132 			}
133 		}
134 	}
135 }
136 
137 static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
138 						  unsigned int set)
139 {
140 	struct pnp_option *tail = NULL, *first_new_option = NULL;
141 	struct pnp_option *option, *new_option;
142 	unsigned int flags;
143 
144 	list_for_each_entry(option, &dev->options, list) {
145 		if (pnp_option_is_dependent(option))
146 			tail = option;
147 	}
148 	if (!tail) {
149 		dev_err(&dev->dev, "no dependent option sets\n");
150 		return NULL;
151 	}
152 
153 	flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
154 	list_for_each_entry(option, &dev->options, list) {
155 		if (pnp_option_is_dependent(option) &&
156 		    pnp_option_set(option) == set) {
157 			new_option = kmalloc(sizeof(struct pnp_option),
158 					     GFP_KERNEL);
159 			if (!new_option) {
160 				dev_err(&dev->dev, "couldn't clone dependent "
161 					"set %d\n", set);
162 				return NULL;
163 			}
164 
165 			*new_option = *option;
166 			new_option->flags = flags;
167 			if (!first_new_option)
168 				first_new_option = new_option;
169 
170 			list_add(&new_option->list, &tail->list);
171 			tail = new_option;
172 		}
173 	}
174 
175 	return first_new_option;
176 }
177 
178 
179 static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
180 {
181 	struct pnp_option *new_option;
182 	unsigned int num_sets, i, set;
183 	struct pnp_irq *irq;
184 
185 	num_sets = dev->num_dependent_sets;
186 	for (i = 0; i < num_sets; i++) {
187 		new_option = pnp_clone_dependent_set(dev, i);
188 		if (!new_option)
189 			return;
190 
191 		set = pnp_option_set(new_option);
192 		while (new_option && pnp_option_set(new_option) == set) {
193 			if (new_option->type == IORESOURCE_IRQ) {
194 				irq = &new_option->u.irq;
195 				irq->flags |= IORESOURCE_IRQ_OPTIONAL;
196 			}
197 			dbg_pnp_show_option(dev, new_option);
198 			new_option = list_entry(new_option->list.next,
199 						struct pnp_option, list);
200 		}
201 
202 		dev_info(&dev->dev, "added dependent option set %d (same as "
203 			 "set %d except IRQ optional)\n", set, i);
204 	}
205 }
206 
207 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
208 {
209 	struct pnp_option *option;
210 	struct pnp_irq *irq = NULL;
211 	unsigned int independent_irqs = 0;
212 
213 	list_for_each_entry(option, &dev->options, list) {
214 		if (option->type == IORESOURCE_IRQ &&
215 		    !pnp_option_is_dependent(option)) {
216 			independent_irqs++;
217 			irq = &option->u.irq;
218 		}
219 	}
220 
221 	if (independent_irqs != 1)
222 		return;
223 
224 	irq->flags |= IORESOURCE_IRQ_OPTIONAL;
225 	dev_info(&dev->dev, "made independent IRQ optional\n");
226 }
227 
228 #include <linux/pci.h>
229 
230 static void quirk_system_pci_resources(struct pnp_dev *dev)
231 {
232 	struct pci_dev *pdev = NULL;
233 	struct resource *res;
234 	resource_size_t pnp_start, pnp_end, pci_start, pci_end;
235 	int i, j;
236 
237 	/*
238 	 * Some BIOSes have PNP motherboard devices with resources that
239 	 * partially overlap PCI BARs.  The PNP system driver claims these
240 	 * motherboard resources, which prevents the normal PCI driver from
241 	 * requesting them later.
242 	 *
243 	 * This patch disables the PNP resources that conflict with PCI BARs
244 	 * so they won't be claimed by the PNP system driver.
245 	 */
246 	for_each_pci_dev(pdev) {
247 		for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
248 			unsigned long type;
249 
250 			type = pci_resource_flags(pdev, i) &
251 					(IORESOURCE_IO | IORESOURCE_MEM);
252 			if (!type || pci_resource_len(pdev, i) == 0)
253 				continue;
254 
255 			pci_start = pci_resource_start(pdev, i);
256 			pci_end = pci_resource_end(pdev, i);
257 			for (j = 0;
258 			     (res = pnp_get_resource(dev, type, j)); j++) {
259 				if (res->start == 0 && res->end == 0)
260 					continue;
261 
262 				pnp_start = res->start;
263 				pnp_end = res->end;
264 
265 				/*
266 				 * If the PNP region doesn't overlap the PCI
267 				 * region at all, there's no problem.
268 				 */
269 				if (pnp_end < pci_start || pnp_start > pci_end)
270 					continue;
271 
272 				/*
273 				 * If the PNP region completely encloses (or is
274 				 * at least as large as) the PCI region, that's
275 				 * also OK.  For example, this happens when the
276 				 * PNP device describes a bridge with PCI
277 				 * behind it.
278 				 */
279 				if (pnp_start <= pci_start &&
280 				    pnp_end >= pci_end)
281 					continue;
282 
283 				/*
284 				 * Otherwise, the PNP region overlaps *part* of
285 				 * the PCI region, and that might prevent a PCI
286 				 * driver from requesting its resources.
287 				 */
288 				dev_warn(&dev->dev,
289 					 "disabling %pR because it overlaps "
290 					 "%s BAR %d %pR\n", res,
291 					 pci_name(pdev), i, &pdev->resource[i]);
292 				res->flags |= IORESOURCE_DISABLED;
293 			}
294 		}
295 	}
296 }
297 
298 #ifdef CONFIG_AMD_NB
299 
300 #include <asm/amd_nb.h>
301 
302 static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
303 {
304 	resource_size_t start, end;
305 	struct pnp_resource *pnp_res;
306 	struct resource *res;
307 	struct resource mmconfig_res, *mmconfig;
308 
309 	mmconfig = amd_get_mmconfig_range(&mmconfig_res);
310 	if (!mmconfig)
311 		return;
312 
313 	list_for_each_entry(pnp_res, &dev->resources, list) {
314 		res = &pnp_res->res;
315 		if (res->end < mmconfig->start || res->start > mmconfig->end ||
316 		    (res->start == mmconfig->start && res->end == mmconfig->end))
317 			continue;
318 
319 		dev_info(&dev->dev, FW_BUG
320 			 "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
321 			 res, mmconfig);
322 		if (mmconfig->start < res->start) {
323 			start = mmconfig->start;
324 			end = res->start - 1;
325 			pnp_add_mem_resource(dev, start, end, 0);
326 		}
327 		if (mmconfig->end > res->end) {
328 			start = res->end + 1;
329 			end = mmconfig->end;
330 			pnp_add_mem_resource(dev, start, end, 0);
331 		}
332 		break;
333 	}
334 }
335 #endif
336 
337 /*
338  *  PnP Quirks
339  *  Cards or devices that need some tweaking due to incomplete resource info
340  */
341 
342 static struct pnp_fixup pnp_fixups[] = {
343 	/* Soundblaster awe io port quirk */
344 	{"CTL0021", quirk_awe32_resources},
345 	{"CTL0022", quirk_awe32_resources},
346 	{"CTL0023", quirk_awe32_resources},
347 	/* CMI 8330 interrupt and dma fix */
348 	{"@X@0001", quirk_cmi8330_resources},
349 	/* Soundblaster audio device io port range quirk */
350 	{"CTL0001", quirk_sb16audio_resources},
351 	{"CTL0031", quirk_sb16audio_resources},
352 	{"CTL0041", quirk_sb16audio_resources},
353 	{"CTL0042", quirk_sb16audio_resources},
354 	{"CTL0043", quirk_sb16audio_resources},
355 	{"CTL0044", quirk_sb16audio_resources},
356 	{"CTL0045", quirk_sb16audio_resources},
357 	/* Add IRQ-optional MPU options */
358 	{"ADS7151", quirk_ad1815_mpu_resources},
359 	{"ADS7181", quirk_add_irq_optional_dependent_sets},
360 	{"AZT0002", quirk_add_irq_optional_dependent_sets},
361 	/* PnP resources that might overlap PCI BARs */
362 	{"PNP0c01", quirk_system_pci_resources},
363 	{"PNP0c02", quirk_system_pci_resources},
364 #ifdef CONFIG_AMD_NB
365 	{"PNP0c01", quirk_amd_mmconfig_area},
366 #endif
367 	{""}
368 };
369 
370 void pnp_fixup_device(struct pnp_dev *dev)
371 {
372 	struct pnp_fixup *f;
373 
374 	for (f = pnp_fixups; *f->id; f++) {
375 		if (!compare_pnp_id(dev->id, f->id))
376 			continue;
377 		pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
378 			f->quirk_function);
379 		f->quirk_function(dev);
380 	}
381 }
382