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);