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 *
9 * Heavily based on PCI quirks handling which is
10 *
11 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
12 */
13
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>
19 #include <linux/io.h>
20 #include <linux/kallsyms.h>
21 #include "base.h"
22
23 static void quirk_awe32_resources(struct pnp_dev *dev)
24 {
25 struct pnp_port *port, *port2, *port3;
26 struct pnp_option *res = dev->dependent;
27
28 /*
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
32 * hand.
33 */
34 for (; res; res = res->next) {
35 port2 = pnp_alloc(sizeof(struct pnp_port));
36 if (!port2)
37 return;
38 port3 = pnp_alloc(sizeof(struct pnp_port));
39 if (!port3) {
40 kfree(port2);
41 return;
42 }
43 port = res->port;
44 memcpy(port2, port, sizeof(struct pnp_port));
45 memcpy(port3, port, sizeof(struct pnp_port));
46 port->next = port2;
47 port2->next = port3;
48 port2->min += 0x400;
49 port2->max += 0x400;
50 port3->min += 0x800;
51 port3->max += 0x800;
52 }
53 printk(KERN_INFO "pnp: AWE32 quirk - adding two ports\n");
54 }
55
56 static void quirk_cmi8330_resources(struct pnp_dev *dev)
57 {
58 struct pnp_option *res = dev->dependent;
59 unsigned long tmp;
60
61 for (; res; res = res->next) {
62
63 struct pnp_irq *irq;
64 struct pnp_dma *dma;
65
66 for (irq = res->irq; irq; irq = irq->next) { // Valid irqs are 5, 7, 10
67 tmp = 0x04A0;
68 bitmap_copy(irq->map, &tmp, 16); // 0000 0100 1010 0000
69 }
70
71 for (dma = res->dma; dma; dma = dma->next) // Valid 8bit dma channels are 1,3
72 if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
73 IORESOURCE_DMA_8BIT)
74 dma->map = 0x000A;
75 }
76 printk(KERN_INFO "pnp: CMI8330 quirk - fixing interrupts and dma\n");
77 }
78
79 static void quirk_sb16audio_resources(struct pnp_dev *dev)
80 {
81 struct pnp_port *port;
82 struct pnp_option *res = dev->dependent;
83 int changed = 0;
84
85 /*
86 * The default range on the mpu port for these devices is 0x388-0x388.
87 * Here we increase that range so that two such cards can be
88 * auto-configured.
89 */
90
91 for (; res; res = res->next) {
92 port = res->port;
93 if (!port)
94 continue;
95 port = port->next;
96 if (!port)
97 continue;
98 port = port->next;
99 if (!port)
100 continue;
101 if (port->min != port->max)
102 continue;
103 port->max += 0x70;
104 changed = 1;
105 }
106 if (changed)
107 printk(KERN_INFO
108 "pnp: SB audio device quirk - increasing port range\n");
109 }
110
111
112 #include <linux/pci.h>
113
114 static void quirk_system_pci_resources(struct pnp_dev *dev)
115 {
116 struct pci_dev *pdev = NULL;
117 resource_size_t pnp_start, pnp_end, pci_start, pci_end;
118 int i, j;
119
120 /*
121 * Some BIOSes have PNP motherboard devices with resources that
122 * partially overlap PCI BARs. The PNP system driver claims these
123 * motherboard resources, which prevents the normal PCI driver from
124 * requesting them later.
125 *
126 * This patch disables the PNP resources that conflict with PCI BARs
127 * so they won't be claimed by the PNP system driver.
128 */
129 for_each_pci_dev(pdev) {
130 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
131 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
132 pci_resource_len(pdev, i) == 0)
133 continue;
134
135 pci_start = pci_resource_start(pdev, i);
136 pci_end = pci_resource_end(pdev, i);
137 for (j = 0; j < PNP_MAX_MEM; j++) {
138 if (!pnp_mem_valid(dev, j) ||
139 pnp_mem_len(dev, j) == 0)
140 continue;
141
142 pnp_start = pnp_mem_start(dev, j);
143 pnp_end = pnp_mem_end(dev, j);
144
145 /*
146 * If the PNP region doesn't overlap the PCI
147 * region at all, there's no problem.
148 */
149 if (pnp_end < pci_start || pnp_start > pci_end)
150 continue;
151
152 /*
153 * If the PNP region completely encloses (or is
154 * at least as large as) the PCI region, that's
155 * also OK. For example, this happens when the
156 * PNP device describes a bridge with PCI
157 * behind it.
158 */
159 if (pnp_start <= pci_start &&
160 pnp_end >= pci_end)
161 continue;
162
163 /*
164 * Otherwise, the PNP region overlaps *part* of
165 * the PCI region, and that might prevent a PCI
166 * driver from requesting its resources.
167 */
168 dev_warn(&dev->dev, "mem resource "
169 "(0x%llx-0x%llx) overlaps %s BAR %d "
170 "(0x%llx-0x%llx), disabling\n",
171 (unsigned long long) pnp_start,
172 (unsigned long long) pnp_end,
173 pci_name(pdev), i,
174 (unsigned long long) pci_start,
175 (unsigned long long) pci_end);
176 pnp_mem_flags(dev, j) = 0;
177 }
178 }
179 }
180 }
181
182 /*
183 * PnP Quirks
184 * Cards or devices that need some tweaking due to incomplete resource info
185 */
186
187 static struct pnp_fixup pnp_fixups[] = {
188 /* Soundblaster awe io port quirk */
189 {"CTL0021", quirk_awe32_resources},
190 {"CTL0022", quirk_awe32_resources},
191 {"CTL0023", quirk_awe32_resources},
192 /* CMI 8330 interrupt and dma fix */
193 {"@X@0001", quirk_cmi8330_resources},
194 /* Soundblaster audio device io port range quirk */
195 {"CTL0001", quirk_sb16audio_resources},
196 {"CTL0031", quirk_sb16audio_resources},
197 {"CTL0041", quirk_sb16audio_resources},
198 {"CTL0042", quirk_sb16audio_resources},
199 {"CTL0043", quirk_sb16audio_resources},
200 {"CTL0044", quirk_sb16audio_resources},
201 {"CTL0045", quirk_sb16audio_resources},
202 {"PNP0c01", quirk_system_pci_resources},
203 {"PNP0c02", quirk_system_pci_resources},
204 {""}
205 };
206
207 void pnp_fixup_device(struct pnp_dev *dev)
208 {
209 int i = 0;
210 void (*quirk)(struct pnp_dev *);
211
212 while (*pnp_fixups[i].id) {
213 if (compare_pnp_id(dev->id, pnp_fixups[i].id)) {
214 quirk = pnp_fixups[i].quirk_function;
215
216 #ifdef DEBUG
217 dev_dbg(&dev->dev, "calling quirk 0x%p", quirk);
218 print_fn_descriptor_symbol(": %s()\n",
219 (unsigned long) *quirk);
220 #endif
221 (*quirk)(dev);
222 }
223 i++;
224 }
225 }
226
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