2 * The PCI Library -- OpenBSD /dev/pci access
4 * Adapted from fbsd-device.c by Matthieu Herrb <matthieu.herrb@laas.fr>, 2006
6 * Can be freely distributed and used under the terms of the GNU GPL.
13 #include <sys/endian.h>
14 #include <sys/types.h>
15 #include <sys/ioctl.h>
16 #include <sys/pciio.h>
20 obsd_config(struct pci_access *a)
22 pci_define_param(a, "obsd.path", PCI_PATH_OBSD_DEVICE, "Path to the OpenBSD PCI device");
26 obsd_detect(struct pci_access *a)
28 char *name = pci_get_param(a, "obsd.path");
30 if (access(name, R_OK))
32 a->warning("Cannot open %s", name);
35 a->debug("...using %s", name);
40 obsd_init(struct pci_access *a)
42 char *name = pci_get_param(a, "obsd.path");
44 a->fd = open(name, O_RDWR, 0);
46 a->error("obsd_init: %s open failed", name);
50 obsd_cleanup(struct pci_access *a)
56 obsd_read(struct pci_dev *d, int pos, byte *buf, int len)
65 if (!(len == 1 || len == 2 || len == 4))
66 return pci_generic_block_read(d, pos, buf, len);
71 pi.pi_sel.pc_bus = d->bus;
72 pi.pi_sel.pc_dev = d->dev;
73 pi.pi_sel.pc_func = d->func;
75 pi.pi_reg = pos - (pos % 4);
78 if (ioctl(d->access->fd, PCIOCREAD, &pi) < 0) {
80 pi.pi_data = 0xffffffff;
82 d->access->error("obsd_read: ioctl(PCIOCREAD) failed");
89 buf[0] = (u8) u.u8[pos % 4];
92 ((u16 *) buf)[0] = letoh16(u.u16[(pos % 4) / 2]);
95 ((u32 *) buf)[0] = (u32) letoh32(pi.pi_data);
102 obsd_write(struct pci_dev *d, int pos, byte *buf, int len)
106 if (!(len == 1 || len == 2 || len == 4))
107 return pci_generic_block_write(d, pos, buf, len);
112 pi.pi_sel.pc_bus = d->bus;
113 pi.pi_sel.pc_dev = d->dev;
114 pi.pi_sel.pc_func = d->func;
125 pi.pi_data = ((u16 *) buf)[0];
128 pi.pi_data = ((u32 *) buf)[0];
132 if (ioctl(d->access->fd, PCIOCWRITE, &pi) < 0)
133 d->access->error("obsd_write: ioctl(PCIOCWRITE) failed");
138 struct pci_methods pm_obsd_device = {
140 "/dev/pci on OpenBSD",
146 pci_generic_fill_info,
150 NULL /* dev_cleanup */