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
) { // Valid irqs are 5, 7, 10
71 bitmap_copy(irq
->map
, &tmp
, 16); // 0000 0100 1010 0000
74 for (dma
= res
->dma
; dma
; dma
= dma
->next
) // Valid 8bit dma channels are 1,3
75 if ((dma
->flags
& IORESOURCE_DMA_TYPE_MASK
) ==
79 dev_info(&dev
->dev
, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
80 "and DMA channels to 1, 3\n");
83 static void quirk_sb16audio_resources(struct pnp_dev
*dev
)
85 struct pnp_port
*port
;
86 struct pnp_option
*res
= dev
->dependent
;
90 * The default range on the mpu port for these devices is 0x388-0x388.
91 * Here we increase that range so that two such cards can be
95 for (; res
; res
= res
->next
) {
105 if (port
->min
!= port
->max
)
111 dev_info(&dev
->dev
, "SB audio device quirk - increased port range\n");
115 #include <linux/pci.h>
117 static void quirk_system_pci_resources(struct pnp_dev
*dev
)
119 struct pci_dev
*pdev
= NULL
;
120 struct resource
*res
;
121 resource_size_t pnp_start
, pnp_end
, pci_start
, pci_end
;
125 * Some BIOSes have PNP motherboard devices with resources that
126 * partially overlap PCI BARs. The PNP system driver claims these
127 * motherboard resources, which prevents the normal PCI driver from
128 * requesting them later.
130 * This patch disables the PNP resources that conflict with PCI BARs
131 * so they won't be claimed by the PNP system driver.
133 for_each_pci_dev(pdev
) {
134 for (i
= 0; i
< DEVICE_COUNT_RESOURCE
; i
++) {
135 if (!(pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
) ||
136 pci_resource_len(pdev
, i
) == 0)
139 pci_start
= pci_resource_start(pdev
, i
);
140 pci_end
= pci_resource_end(pdev
, i
);
141 for (j
= 0; j
< PNP_MAX_MEM
; j
++) {
142 if (!pnp_mem_valid(dev
, j
) ||
143 pnp_mem_len(dev
, j
) == 0)
146 pnp_start
= pnp_mem_start(dev
, j
);
147 pnp_end
= pnp_mem_end(dev
, j
);
150 * If the PNP region doesn't overlap the PCI
151 * region at all, there's no problem.
153 if (pnp_end
< pci_start
|| pnp_start
> pci_end
)
157 * If the PNP region completely encloses (or is
158 * at least as large as) the PCI region, that's
159 * also OK. For example, this happens when the
160 * PNP device describes a bridge with PCI
163 if (pnp_start
<= pci_start
&&
168 * Otherwise, the PNP region overlaps *part* of
169 * the PCI region, and that might prevent a PCI
170 * driver from requesting its resources.
172 dev_warn(&dev
->dev
, "mem resource "
173 "(0x%llx-0x%llx) overlaps %s BAR %d "
174 "(0x%llx-0x%llx), disabling\n",
175 (unsigned long long) pnp_start
,
176 (unsigned long long) pnp_end
,
178 (unsigned long long) pci_start
,
179 (unsigned long long) pci_end
);
180 res
= pnp_get_resource(dev
, IORESOURCE_MEM
, j
);
189 * Cards or devices that need some tweaking due to incomplete resource info
192 static struct pnp_fixup pnp_fixups
[] = {
193 /* Soundblaster awe io port quirk */
194 {"CTL0021", quirk_awe32_resources
},
195 {"CTL0022", quirk_awe32_resources
},
196 {"CTL0023", quirk_awe32_resources
},
197 /* CMI 8330 interrupt and dma fix */
198 {"@X@0001", quirk_cmi8330_resources
},
199 /* Soundblaster audio device io port range quirk */
200 {"CTL0001", quirk_sb16audio_resources
},
201 {"CTL0031", quirk_sb16audio_resources
},
202 {"CTL0041", quirk_sb16audio_resources
},
203 {"CTL0042", quirk_sb16audio_resources
},
204 {"CTL0043", quirk_sb16audio_resources
},
205 {"CTL0044", quirk_sb16audio_resources
},
206 {"CTL0045", quirk_sb16audio_resources
},
207 {"PNP0c01", quirk_system_pci_resources
},
208 {"PNP0c02", quirk_system_pci_resources
},
212 void pnp_fixup_device(struct pnp_dev
*dev
)
215 void (*quirk
)(struct pnp_dev
*);
217 while (*pnp_fixups
[i
].id
) {
218 if (compare_pnp_id(dev
->id
, pnp_fixups
[i
].id
)) {
219 quirk
= pnp_fixups
[i
].quirk_function
;
222 dev_dbg(&dev
->dev
, "calling ");
223 print_fn_descriptor_symbol("%s()\n",
224 (unsigned long) *quirk
);