[SCSI] zfcp: Cleanup function parameters for sbal value.
[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  *  Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
9  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
10  *
11  *  Heavily based on PCI quirks handling which is
12  *
13  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
14  */
15
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/slab.h>
20 #include <linux/pnp.h>
21 #include <linux/io.h>
22 #include <linux/kallsyms.h>
23 #include "base.h"
24
25 static void quirk_awe32_add_ports(struct pnp_dev *dev,
26                                   struct pnp_option *option,
27                                   unsigned int offset)
28 {
29         struct pnp_option *new_option;
30
31         new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
32         if (!new_option) {
33                 dev_err(&dev->dev, "couldn't add ioport region to option set "
34                         "%d\n", pnp_option_set(option));
35                 return;
36         }
37
38         *new_option = *option;
39         new_option->u.port.min += offset;
40         new_option->u.port.max += offset;
41         list_add(&new_option->list, &option->list);
42
43         dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
44                 (unsigned long long) new_option->u.port.min,
45                 (unsigned long long) new_option->u.port.max,
46                 pnp_option_set(option));
47 }
48
49 static void quirk_awe32_resources(struct pnp_dev *dev)
50 {
51         struct pnp_option *option;
52         unsigned int set = ~0;
53
54         /*
55          * Add two extra ioport regions (at offset 0x400 and 0x800 from the
56          * one given) to every dependent option set.
57          */
58         list_for_each_entry(option, &dev->options, list) {
59                 if (pnp_option_is_dependent(option) &&
60                     pnp_option_set(option) != set) {
61                         set = pnp_option_set(option);
62                         quirk_awe32_add_ports(dev, option, 0x800);
63                         quirk_awe32_add_ports(dev, option, 0x400);
64                 }
65         }
66 }
67
68 static void quirk_cmi8330_resources(struct pnp_dev *dev)
69 {
70         struct pnp_option *option;
71         struct pnp_irq *irq;
72         struct pnp_dma *dma;
73
74         list_for_each_entry(option, &dev->options, list) {
75                 if (!pnp_option_is_dependent(option))
76                         continue;
77
78                 if (option->type == IORESOURCE_IRQ) {
79                         irq = &option->u.irq;
80                         bitmap_zero(irq->map.bits, PNP_IRQ_NR);
81                         __set_bit(5, irq->map.bits);
82                         __set_bit(7, irq->map.bits);
83                         __set_bit(10, irq->map.bits);
84                         dev_info(&dev->dev, "set possible IRQs in "
85                                  "option set %d to 5, 7, 10\n",
86                                  pnp_option_set(option));
87                 } else if (option->type == IORESOURCE_DMA) {
88                         dma = &option->u.dma;
89                         if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
90                                                 IORESOURCE_DMA_8BIT &&
91                             dma->map != 0x0A) {
92                                 dev_info(&dev->dev, "changing possible "
93                                          "DMA channel mask in option set %d "
94                                          "from %#02x to 0x0A (1, 3)\n",
95                                          pnp_option_set(option), dma->map);
96                                 dma->map = 0x0A;
97                         }
98                 }
99         }
100 }
101
102 static void quirk_sb16audio_resources(struct pnp_dev *dev)
103 {
104         struct pnp_option *option;
105         unsigned int prev_option_flags = ~0, n = 0;
106         struct pnp_port *port;
107
108         /*
109          * The default range on the OPL port for these devices is 0x388-0x388.
110          * Here we increase that range so that two such cards can be
111          * auto-configured.
112          */
113         list_for_each_entry(option, &dev->options, list) {
114                 if (prev_option_flags != option->flags) {
115                         prev_option_flags = option->flags;
116                         n = 0;
117                 }
118
119                 if (pnp_option_is_dependent(option) &&
120                     option->type == IORESOURCE_IO) {
121                         n++;
122                         port = &option->u.port;
123                         if (n == 3 && port->min == port->max) {
124                                 port->max += 0x70;
125                                 dev_info(&dev->dev, "increased option port "
126                                          "range from %#llx-%#llx to "
127                                          "%#llx-%#llx\n",
128                                          (unsigned long long) port->min,
129                                          (unsigned long long) port->min,
130                                          (unsigned long long) port->min,
131                                          (unsigned long long) port->max);
132                         }
133                 }
134         }
135 }
136
137 static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
138                                                   unsigned int set)
139 {
140         struct pnp_option *tail = NULL, *first_new_option = NULL;
141         struct pnp_option *option, *new_option;
142         unsigned int flags;
143
144         list_for_each_entry(option, &dev->options, list) {
145                 if (pnp_option_is_dependent(option))
146                         tail = option;
147         }
148         if (!tail) {
149                 dev_err(&dev->dev, "no dependent option sets\n");
150                 return NULL;
151         }
152
153         flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
154         list_for_each_entry(option, &dev->options, list) {
155                 if (pnp_option_is_dependent(option) &&
156                     pnp_option_set(option) == set) {
157                         new_option = kmalloc(sizeof(struct pnp_option),
158                                              GFP_KERNEL);
159                         if (!new_option) {
160                                 dev_err(&dev->dev, "couldn't clone dependent "
161                                         "set %d\n", set);
162                                 return NULL;
163                         }
164
165                         *new_option = *option;
166                         new_option->flags = flags;
167                         if (!first_new_option)
168                                 first_new_option = new_option;
169
170                         list_add(&new_option->list, &tail->list);
171                         tail = new_option;
172                 }
173         }
174
175         return first_new_option;
176 }
177
178
179 static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
180 {
181         struct pnp_option *new_option;
182         unsigned int num_sets, i, set;
183         struct pnp_irq *irq;
184
185         num_sets = dev->num_dependent_sets;
186         for (i = 0; i < num_sets; i++) {
187                 new_option = pnp_clone_dependent_set(dev, i);
188                 if (!new_option)
189                         return;
190
191                 set = pnp_option_set(new_option);
192                 while (new_option && pnp_option_set(new_option) == set) {
193                         if (new_option->type == IORESOURCE_IRQ) {
194                                 irq = &new_option->u.irq;
195                                 irq->flags |= IORESOURCE_IRQ_OPTIONAL;
196                         }
197                         dbg_pnp_show_option(dev, new_option);
198                         new_option = list_entry(new_option->list.next,
199                                                 struct pnp_option, list);
200                 }
201
202                 dev_info(&dev->dev, "added dependent option set %d (same as "
203                          "set %d except IRQ optional)\n", set, i);
204         }
205 }
206
207 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
208 {
209         struct pnp_option *option;
210         struct pnp_irq *irq = NULL;
211         unsigned int independent_irqs = 0;
212
213         list_for_each_entry(option, &dev->options, list) {
214                 if (option->type == IORESOURCE_IRQ &&
215                     !pnp_option_is_dependent(option)) {
216                         independent_irqs++;
217                         irq = &option->u.irq;
218                 }
219         }
220
221         if (independent_irqs != 1)
222                 return;
223
224         irq->flags |= IORESOURCE_IRQ_OPTIONAL;
225         dev_info(&dev->dev, "made independent IRQ optional\n");
226 }
227
228 #include <linux/pci.h>
229
230 static void quirk_system_pci_resources(struct pnp_dev *dev)
231 {
232         struct pci_dev *pdev = NULL;
233         struct resource *res;
234         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
235         int i, j;
236
237         /*
238          * Some BIOSes have PNP motherboard devices with resources that
239          * partially overlap PCI BARs.  The PNP system driver claims these
240          * motherboard resources, which prevents the normal PCI driver from
241          * requesting them later.
242          *
243          * This patch disables the PNP resources that conflict with PCI BARs
244          * so they won't be claimed by the PNP system driver.
245          */
246         for_each_pci_dev(pdev) {
247                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
248                         unsigned long type;
249
250                         type = pci_resource_flags(pdev, i) &
251                                         (IORESOURCE_IO | IORESOURCE_MEM);
252                         if (!type || pci_resource_len(pdev, i) == 0)
253                                 continue;
254
255                         pci_start = pci_resource_start(pdev, i);
256                         pci_end = pci_resource_end(pdev, i);
257                         for (j = 0;
258                              (res = pnp_get_resource(dev, type, j)); j++) {
259                                 if (res->start == 0 && res->end == 0)
260                                         continue;
261
262                                 pnp_start = res->start;
263                                 pnp_end = res->end;
264
265                                 /*
266                                  * If the PNP region doesn't overlap the PCI
267                                  * region at all, there's no problem.
268                                  */
269                                 if (pnp_end < pci_start || pnp_start > pci_end)
270                                         continue;
271
272                                 /*
273                                  * If the PNP region completely encloses (or is
274                                  * at least as large as) the PCI region, that's
275                                  * also OK.  For example, this happens when the
276                                  * PNP device describes a bridge with PCI
277                                  * behind it.
278                                  */
279                                 if (pnp_start <= pci_start &&
280                                     pnp_end >= pci_end)
281                                         continue;
282
283                                 /*
284                                  * Otherwise, the PNP region overlaps *part* of
285                                  * the PCI region, and that might prevent a PCI
286                                  * driver from requesting its resources.
287                                  */
288                                 dev_warn(&dev->dev,
289                                          "disabling %pR because it overlaps "
290                                          "%s BAR %d %pR\n", res,
291                                          pci_name(pdev), i, &pdev->resource[i]);
292                                 res->flags |= IORESOURCE_DISABLED;
293                         }
294                 }
295         }
296 }
297
298 /*
299  *  PnP Quirks
300  *  Cards or devices that need some tweaking due to incomplete resource info
301  */
302
303 static struct pnp_fixup pnp_fixups[] = {
304         /* Soundblaster awe io port quirk */
305         {"CTL0021", quirk_awe32_resources},
306         {"CTL0022", quirk_awe32_resources},
307         {"CTL0023", quirk_awe32_resources},
308         /* CMI 8330 interrupt and dma fix */
309         {"@X@0001", quirk_cmi8330_resources},
310         /* Soundblaster audio device io port range quirk */
311         {"CTL0001", quirk_sb16audio_resources},
312         {"CTL0031", quirk_sb16audio_resources},
313         {"CTL0041", quirk_sb16audio_resources},
314         {"CTL0042", quirk_sb16audio_resources},
315         {"CTL0043", quirk_sb16audio_resources},
316         {"CTL0044", quirk_sb16audio_resources},
317         {"CTL0045", quirk_sb16audio_resources},
318         /* Add IRQ-optional MPU options */
319         {"ADS7151", quirk_ad1815_mpu_resources},
320         {"ADS7181", quirk_add_irq_optional_dependent_sets},
321         {"AZT0002", quirk_add_irq_optional_dependent_sets},
322         /* PnP resources that might overlap PCI BARs */
323         {"PNP0c01", quirk_system_pci_resources},
324         {"PNP0c02", quirk_system_pci_resources},
325         {""}
326 };
327
328 void pnp_fixup_device(struct pnp_dev *dev)
329 {
330         struct pnp_fixup *f;
331
332         for (f = pnp_fixups; *f->id; f++) {
333                 if (!compare_pnp_id(dev->id, f->id))
334                         continue;
335                 pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
336                         f->quirk_function);
337                 f->quirk_function(dev);
338         }
339 }