PNP: remove redundant pnp_can_configure() check
[linux-2.6.git] / drivers / pnp / quirks.c
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                 dev_info(&dev->dev,
53                         "AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
54                         (unsigned long)port2->min,
55                         (unsigned long)port3->min);
56         }
57 }
58
59 static void quirk_cmi8330_resources(struct pnp_dev *dev)
60 {
61         struct pnp_option *res = dev->dependent;
62         unsigned long tmp;
63
64         for (; res; res = res->next) {
65
66                 struct pnp_irq *irq;
67                 struct pnp_dma *dma;
68
69                 for (irq = res->irq; irq; irq = irq->next) {
70                         /* Valid irqs are 5, 7, 10 */
71                         tmp = 0x04A0;
72                         bitmap_copy(irq->map.bits, &tmp, 16);
73                 }
74
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) ==
78                             IORESOURCE_DMA_8BIT)
79                                 dma->map = 0x000A;
80                 }
81         }
82         dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
83                 "and DMA channels to 1, 3\n");
84 }
85
86 static void quirk_sb16audio_resources(struct pnp_dev *dev)
87 {
88         struct pnp_port *port;
89         struct pnp_option *res = dev->dependent;
90         int changed = 0;
91
92         /*
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
95          * auto-configured.
96          */
97
98         for (; res; res = res->next) {
99                 port = res->port;
100                 if (!port)
101                         continue;
102                 port = port->next;
103                 if (!port)
104                         continue;
105                 port = port->next;
106                 if (!port)
107                         continue;
108                 if (port->min != port->max)
109                         continue;
110                 port->max += 0x70;
111                 changed = 1;
112         }
113         if (changed)
114                 dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
115 }
116
117 static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
118 {
119         struct pnp_option *head = NULL;
120         struct pnp_option *prev = NULL;
121         struct pnp_option *res;
122
123         /*
124          * Build a functional IRQ-less variant of each MPU option.
125          */
126
127         for (res = dev->dependent; res; res = res->next) {
128                 struct pnp_option *curr;
129                 struct pnp_port *port;
130                 struct pnp_port *copy;
131
132                 port = res->port;
133                 if (!port || !res->irq)
134                         continue;
135
136                 copy = pnp_alloc(sizeof *copy);
137                 if (!copy)
138                         break;
139
140                 copy->min = port->min;
141                 copy->max = port->max;
142                 copy->align = port->align;
143                 copy->size = port->size;
144                 copy->flags = port->flags;
145
146                 curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
147                 if (!curr) {
148                         kfree(copy);
149                         break;
150                 }
151                 curr->port = copy;
152
153                 if (prev)
154                         prev->next = curr;
155                 else
156                         head = curr;
157                 prev = curr;
158         }
159         if (head)
160                 dev_info(&dev->dev, "adding IRQ-less MPU options\n");
161
162         return head;
163 }
164
165 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
166 {
167         struct pnp_option *res;
168         struct pnp_irq *irq;
169
170         /*
171          * Distribute the independent IRQ over the dependent options
172          */
173
174         res = dev->independent;
175         if (!res)
176                 return;
177
178         irq = res->irq;
179         if (!irq || irq->next)
180                 return;
181
182         res = dev->dependent;
183         if (!res)
184                 return;
185
186         while (1) {
187                 struct pnp_irq *copy;
188
189                 copy = pnp_alloc(sizeof *copy);
190                 if (!copy)
191                         break;
192
193                 bitmap_copy(copy->map.bits, irq->map.bits, PNP_IRQ_NR);
194                 copy->flags = irq->flags;
195
196                 copy->next = res->irq; /* Yes, this is NULL */
197                 res->irq = copy;
198
199                 if (!res->next)
200                         break;
201                 res = res->next;
202         }
203         kfree(irq);
204
205         res->next = quirk_isapnp_mpu_options(dev);
206
207         res = dev->independent;
208         res->irq = NULL;
209 }
210
211 static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
212 {
213         struct pnp_option *res;
214
215         res = dev->dependent;
216         if (!res)
217                 return;
218
219         while (res->next)
220                 res = res->next;
221
222         res->next = quirk_isapnp_mpu_options(dev);
223 }
224
225 #include <linux/pci.h>
226
227 static void quirk_system_pci_resources(struct pnp_dev *dev)
228 {
229         struct pci_dev *pdev = NULL;
230         struct resource *res;
231         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
232         int i, j;
233
234         /*
235          * Some BIOSes have PNP motherboard devices with resources that
236          * partially overlap PCI BARs.  The PNP system driver claims these
237          * motherboard resources, which prevents the normal PCI driver from
238          * requesting them later.
239          *
240          * This patch disables the PNP resources that conflict with PCI BARs
241          * so they won't be claimed by the PNP system driver.
242          */
243         for_each_pci_dev(pdev) {
244                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
245                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
246                             pci_resource_len(pdev, i) == 0)
247                                 continue;
248
249                         pci_start = pci_resource_start(pdev, i);
250                         pci_end = pci_resource_end(pdev, i);
251                         for (j = 0;
252                              (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
253                              j++) {
254                                 if (res->start == 0 && res->end == 0)
255                                         continue;
256
257                                 pnp_start = res->start;
258                                 pnp_end = res->end;
259
260                                 /*
261                                  * If the PNP region doesn't overlap the PCI
262                                  * region at all, there's no problem.
263                                  */
264                                 if (pnp_end < pci_start || pnp_start > pci_end)
265                                         continue;
266
267                                 /*
268                                  * If the PNP region completely encloses (or is
269                                  * at least as large as) the PCI region, that's
270                                  * also OK.  For example, this happens when the
271                                  * PNP device describes a bridge with PCI
272                                  * behind it.
273                                  */
274                                 if (pnp_start <= pci_start &&
275                                     pnp_end >= pci_end)
276                                         continue;
277
278                                 /*
279                                  * Otherwise, the PNP region overlaps *part* of
280                                  * the PCI region, and that might prevent a PCI
281                                  * driver from requesting its resources.
282                                  */
283                                 dev_warn(&dev->dev, "mem resource "
284                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
285                                         "(0x%llx-0x%llx), disabling\n",
286                                         (unsigned long long) pnp_start,
287                                         (unsigned long long) pnp_end,
288                                         pci_name(pdev), i,
289                                         (unsigned long long) pci_start,
290                                         (unsigned long long) pci_end);
291                                 res->flags |= IORESOURCE_DISABLED;
292                         }
293                 }
294         }
295 }
296
297 /*
298  *  PnP Quirks
299  *  Cards or devices that need some tweaking due to incomplete resource info
300  */
301
302 static struct pnp_fixup pnp_fixups[] = {
303         /* Soundblaster awe io port quirk */
304         {"CTL0021", quirk_awe32_resources},
305         {"CTL0022", quirk_awe32_resources},
306         {"CTL0023", quirk_awe32_resources},
307         /* CMI 8330 interrupt and dma fix */
308         {"@X@0001", quirk_cmi8330_resources},
309         /* Soundblaster audio device io port range quirk */
310         {"CTL0001", quirk_sb16audio_resources},
311         {"CTL0031", quirk_sb16audio_resources},
312         {"CTL0041", quirk_sb16audio_resources},
313         {"CTL0042", quirk_sb16audio_resources},
314         {"CTL0043", quirk_sb16audio_resources},
315         {"CTL0044", quirk_sb16audio_resources},
316         {"CTL0045", quirk_sb16audio_resources},
317         /* Add IRQ-less MPU options */
318         {"ADS7151", quirk_ad1815_mpu_resources},
319         {"ADS7181", quirk_isapnp_mpu_resources},
320         {"AZT0002", quirk_isapnp_mpu_resources},
321         /* PnP resources that might overlap PCI BARs */
322         {"PNP0c01", quirk_system_pci_resources},
323         {"PNP0c02", quirk_system_pci_resources},
324         {""}
325 };
326
327 void pnp_fixup_device(struct pnp_dev *dev)
328 {
329         struct pnp_fixup *f;
330
331         for (f = pnp_fixups; *f->id; f++) {
332                 if (!compare_pnp_id(dev->id, f->id))
333                         continue;
334 #ifdef DEBUG
335                 dev_dbg(&dev->dev, "%s: calling ", f->id);
336                 print_fn_descriptor_symbol("%s\n", f->quirk_function);
337 #endif
338                 f->quirk_function(dev);
339         }
340 }