2 * $Id: access.c,v 1.9 2002/12/26 19:28:33 mj Exp $
4 * The PCI Library -- User Access
6 * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
8 * Can be freely distributed and used under the terms of the GNU GPL.
18 static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = {
20 #ifdef HAVE_PM_LINUX_PROC
25 #ifdef HAVE_PM_SYSCALLS
30 #ifdef HAVE_PM_INTEL_CONF
37 #ifdef HAVE_PM_FBSD_DEVICE
42 #ifdef HAVE_PM_AIX_DEVICE
47 #ifdef HAVE_PM_NBSD_LIBPCI
62 struct pci_access *a = malloc(sizeof(struct pci_access));
66 a->id_file_name = PATH_PCI_IDS;
67 for(i=0; i<PCI_ACCESS_MAX; i++)
68 if (pci_methods[i] && pci_methods[i]->config)
69 pci_methods[i]->config(a);
74 pci_malloc(struct pci_access *a, int size)
76 void *x = malloc(size);
79 a->error("Out of memory (allocation of %d bytes failed)", size);
91 pci_generic_error(char *msg, ...)
96 fputs("pcilib: ", stderr);
97 vfprintf(stderr, msg, args);
103 pci_generic_warn(char *msg, ...)
108 fputs("pcilib: ", stderr);
109 vfprintf(stderr, msg, args);
114 pci_generic_debug(char *msg, ...)
119 vfprintf(stdout, msg, args);
124 pci_null_debug(char * UNUSED msg, ...)
129 pci_init(struct pci_access *a)
132 a->error = pci_generic_error;
134 a->warning = pci_generic_warn;
136 a->debug = pci_generic_debug;
138 a->debug = pci_null_debug;
142 if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method])
143 a->error("This access method is not supported.");
144 a->methods = pci_methods[a->method];
149 for(i=0; i<PCI_ACCESS_MAX; i++)
152 a->debug("Trying method %d...", i);
153 if (pci_methods[i]->detect(a))
156 a->methods = pci_methods[i];
160 a->debug("...No.\n");
163 a->error("Cannot find any working access method.");
165 a->debug("Decided to use %s\n", a->methods->name);
170 pci_cleanup(struct pci_access *a)
172 struct pci_dev *d, *e;
174 for(d=a->devices; d; d=e)
180 a->methods->cleanup(a);
181 pci_free_name_list(a);
186 pci_scan_bus(struct pci_access *a)
192 pci_alloc_dev(struct pci_access *a)
194 struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev));
196 bzero(d, sizeof(*d));
198 d->methods = a->methods;
199 if (d->methods->init_dev)
200 d->methods->init_dev(d);
205 pci_link_dev(struct pci_access *a, struct pci_dev *d)
207 d->next = a->devices;
214 pci_get_dev(struct pci_access *a, int bus, int dev, int func)
216 struct pci_dev *d = pci_alloc_dev(a);
224 void pci_free_dev(struct pci_dev *d)
226 if (d->methods->cleanup_dev)
227 d->methods->cleanup_dev(d);
232 pci_read_data(struct pci_dev *d, void *buf, int pos, int len)
235 d->access->error("Unaligned read: pos=%02x, len=%d", pos, len);
236 if (pos + len <= d->cache_len)
237 memcpy(buf, d->cache + pos, len);
238 else if (!d->methods->read(d, pos, buf, len))
239 memset(buf, 0xff, len);
243 pci_read_byte(struct pci_dev *d, int pos)
246 pci_read_data(d, &buf, pos, 1);
251 pci_read_word(struct pci_dev *d, int pos)
254 pci_read_data(d, &buf, pos, 2);
255 return le16_to_cpu(buf);
259 pci_read_long(struct pci_dev *d, int pos)
262 pci_read_data(d, &buf, pos, 4);
263 return le32_to_cpu(buf);
267 pci_read_block(struct pci_dev *d, int pos, byte *buf, int len)
269 return d->methods->read(d, pos, buf, len);
273 pci_write_data(struct pci_dev *d, void *buf, int pos, int len)
276 d->access->error("Unaligned write: pos=%02x,len=%d", pos, len);
277 if (pos + len <= d->cache_len)
278 memcpy(d->cache + pos, buf, len);
279 return d->methods->write(d, pos, buf, len);
283 pci_write_byte(struct pci_dev *d, int pos, byte data)
285 return pci_write_data(d, &data, pos, 1);
289 pci_write_word(struct pci_dev *d, int pos, word data)
291 word buf = cpu_to_le16(data);
292 return pci_write_data(d, &buf, pos, 2);
296 pci_write_long(struct pci_dev *d, int pos, u32 data)
298 u32 buf = cpu_to_le32(data);
299 return pci_write_data(d, &buf, pos, 4);
303 pci_write_block(struct pci_dev *d, int pos, byte *buf, int len)
305 if (pos < d->cache_len)
307 int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len;
308 memcpy(d->cache + pos, buf, l);
310 return d->methods->write(d, pos, buf, len);
314 pci_fill_info(struct pci_dev *d, int flags)
316 if (flags & PCI_FILL_RESCAN)
318 flags &= ~PCI_FILL_RESCAN;
321 if (flags & ~d->known_fields)
322 d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields);
323 return d->known_fields;
327 pci_setup_cache(struct pci_dev *d, byte *cache, int len)