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.
7 * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
9 * Heavily based on PCI quirks handling which is
11 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/slab.h>
18 #include <linux/pnp.h>
20 #include <linux/kallsyms.h>
23 static void quirk_awe32_resources(struct pnp_dev
*dev
)
25 struct pnp_port
*port
, *port2
, *port3
;
26 struct pnp_option
*res
= dev
->dependent
;
29 * Unfortunately the isapnp_add_port_resource is too tightly bound
30 * into the PnP discovery sequence, and cannot be used. Link in the
31 * two extra ports (at offset 0x400 and 0x800 from the one given) by
34 for (; res
; res
= res
->next
) {
35 port2
= pnp_alloc(sizeof(struct pnp_port
));
38 port3
= pnp_alloc(sizeof(struct pnp_port
));
44 memcpy(port2
, port
, sizeof(struct pnp_port
));
45 memcpy(port3
, port
, sizeof(struct pnp_port
));
53 "AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
54 (unsigned long)port2
->min
,
55 (unsigned long)port3
->min
);
59 static void quirk_cmi8330_resources(struct pnp_dev
*dev
)
61 struct pnp_option
*res
= dev
->dependent
;
64 for (; res
; res
= res
->next
) {
69 for (irq
= res
->irq
; irq
; irq
= irq
->next
) {
70 /* Valid irqs are 5, 7, 10 */
72 bitmap_copy(irq
->map
.bits
, &tmp
, 16);
75 for (dma
= res
->dma
; dma
; dma
= dma
->next
) {
76 /* Valid 8bit dma channels are 1,3 */
77 if ((dma
->flags
& IORESOURCE_DMA_TYPE_MASK
) ==
82 dev_info(&dev
->dev
, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
83 "and DMA channels to 1, 3\n");
86 static void quirk_sb16audio_resources(struct pnp_dev
*dev
)
88 struct pnp_port
*port
;
89 struct pnp_option
*res
= dev
->dependent
;
93 * The default range on the mpu port for these devices is 0x388-0x388.
94 * Here we increase that range so that two such cards can be
98 for (; res
; res
= res
->next
) {
108 if (port
->min
!= port
->max
)
114 dev_info(&dev
->dev
, "SB audio device quirk - increased port range\n");
117 static struct pnp_option
*quirk_isapnp_mpu_options(struct pnp_dev
*dev
)
119 struct pnp_option
*head
= NULL
;
120 struct pnp_option
*prev
= NULL
;
121 struct pnp_option
*res
;
124 * Build a functional IRQ-optional variant of each MPU option.
127 for (res
= dev
->dependent
; res
; res
= res
->next
) {
128 struct pnp_option
*curr
;
129 struct pnp_port
*port
;
130 struct pnp_port
*copy_port
;
132 struct pnp_irq
*copy_irq
;
139 copy_port
= pnp_alloc(sizeof *copy_port
);
143 copy_irq
= pnp_alloc(sizeof *copy_irq
);
150 copy_port
->next
= NULL
;
153 copy_irq
->flags
|= IORESOURCE_IRQ_OPTIONAL
;
154 copy_irq
->next
= NULL
;
156 curr
= pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL
);
162 curr
->port
= copy_port
;
163 curr
->irq
= copy_irq
;
172 dev_info(&dev
->dev
, "adding IRQ-optional MPU options\n");
177 static void quirk_ad1815_mpu_resources(struct pnp_dev
*dev
)
179 struct pnp_option
*res
;
182 res
= dev
->independent
;
187 if (!irq
|| irq
->next
)
190 irq
->flags
|= IORESOURCE_IRQ_OPTIONAL
;
191 dev_info(&dev
->dev
, "made independent IRQ optional\n");
194 static void quirk_isapnp_mpu_resources(struct pnp_dev
*dev
)
196 struct pnp_option
*res
;
198 res
= dev
->dependent
;
205 res
->next
= quirk_isapnp_mpu_options(dev
);
208 #include <linux/pci.h>
210 static void quirk_system_pci_resources(struct pnp_dev
*dev
)
212 struct pci_dev
*pdev
= NULL
;
213 struct resource
*res
;
214 resource_size_t pnp_start
, pnp_end
, pci_start
, pci_end
;
218 * Some BIOSes have PNP motherboard devices with resources that
219 * partially overlap PCI BARs. The PNP system driver claims these
220 * motherboard resources, which prevents the normal PCI driver from
221 * requesting them later.
223 * This patch disables the PNP resources that conflict with PCI BARs
224 * so they won't be claimed by the PNP system driver.
226 for_each_pci_dev(pdev
) {
227 for (i
= 0; i
< DEVICE_COUNT_RESOURCE
; i
++) {
228 if (!(pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
) ||
229 pci_resource_len(pdev
, i
) == 0)
232 pci_start
= pci_resource_start(pdev
, i
);
233 pci_end
= pci_resource_end(pdev
, i
);
235 (res
= pnp_get_resource(dev
, IORESOURCE_MEM
, j
));
237 if (res
->start
== 0 && res
->end
== 0)
240 pnp_start
= res
->start
;
244 * If the PNP region doesn't overlap the PCI
245 * region at all, there's no problem.
247 if (pnp_end
< pci_start
|| pnp_start
> pci_end
)
251 * If the PNP region completely encloses (or is
252 * at least as large as) the PCI region, that's
253 * also OK. For example, this happens when the
254 * PNP device describes a bridge with PCI
257 if (pnp_start
<= pci_start
&&
262 * Otherwise, the PNP region overlaps *part* of
263 * the PCI region, and that might prevent a PCI
264 * driver from requesting its resources.
266 dev_warn(&dev
->dev
, "mem resource "
267 "(0x%llx-0x%llx) overlaps %s BAR %d "
268 "(0x%llx-0x%llx), disabling\n",
269 (unsigned long long) pnp_start
,
270 (unsigned long long) pnp_end
,
272 (unsigned long long) pci_start
,
273 (unsigned long long) pci_end
);
274 res
->flags
|= IORESOURCE_DISABLED
;
282 * Cards or devices that need some tweaking due to incomplete resource info
285 static struct pnp_fixup pnp_fixups
[] = {
286 /* Soundblaster awe io port quirk */
287 {"CTL0021", quirk_awe32_resources
},
288 {"CTL0022", quirk_awe32_resources
},
289 {"CTL0023", quirk_awe32_resources
},
290 /* CMI 8330 interrupt and dma fix */
291 {"@X@0001", quirk_cmi8330_resources
},
292 /* Soundblaster audio device io port range quirk */
293 {"CTL0001", quirk_sb16audio_resources
},
294 {"CTL0031", quirk_sb16audio_resources
},
295 {"CTL0041", quirk_sb16audio_resources
},
296 {"CTL0042", quirk_sb16audio_resources
},
297 {"CTL0043", quirk_sb16audio_resources
},
298 {"CTL0044", quirk_sb16audio_resources
},
299 {"CTL0045", quirk_sb16audio_resources
},
300 /* Add IRQ-less MPU options */
301 {"ADS7151", quirk_ad1815_mpu_resources
},
302 {"ADS7181", quirk_isapnp_mpu_resources
},
303 {"AZT0002", quirk_isapnp_mpu_resources
},
304 /* PnP resources that might overlap PCI BARs */
305 {"PNP0c01", quirk_system_pci_resources
},
306 {"PNP0c02", quirk_system_pci_resources
},
310 void pnp_fixup_device(struct pnp_dev
*dev
)
314 for (f
= pnp_fixups
; *f
->id
; f
++) {
315 if (!compare_pnp_id(dev
->id
, f
->id
))
318 dev_dbg(&dev
->dev
, "%s: calling ", f
->id
);
319 print_fn_descriptor_symbol("%s\n", f
->quirk_function
);
321 f
->quirk_function(dev
);