2 * The PCI Library -- NetBSD libpci access
3 * (based on FreeBSD /dev/pci access)
5 * Copyright (c) 1999 Jari Kirma <kirma@cs.hut.fi>
6 * Copyright (c) 2002 Quentin Garnier <cube@cubidou.net>
7 * Copyright (c) 2002 Martin Mares <mj@ucw.cz>
9 * Can be freely distributed and used under the terms of the GNU GPL.
13 * Read functionality of this driver is briefly tested, and seems
14 * to supply basic information correctly, but I promise no more.
26 nbsd_config(struct pci_access *a)
28 pci_define_param(a, "nbsd.path", PCI_PATH_NBSD_DEVICE, "Path to the NetBSD PCI device");
32 nbsd_detect(struct pci_access *a)
34 char *name = pci_get_param(a, "nbsd.path");
36 if (access(name, R_OK))
38 a->warning("Cannot open %s", name);
42 if (!access(name, W_OK))
43 a->writeable = O_RDWR;
44 a->debug("...using %s", name);
49 nbsd_init(struct pci_access *a)
51 char *name = pci_get_param(a, "nbsd.path");
52 int mode = a->writeable ? O_RDWR : O_RDONLY;
54 a->fd = open(name, mode, 0);
56 a->error("nbsd_init: %s open failed", name);
60 nbsd_cleanup(struct pci_access *a)
66 nbsd_read(struct pci_dev *d, int pos, byte *buf, int len)
71 if (!(len == 1 || len == 2 || len == 4))
72 return pci_generic_block_read(d, pos, buf, len);
74 if (d->domain || pos >= 4096)
80 if (pcibus_conf_read(d->access->fd, d->bus, d->dev, d->func, pos, &val) < 0)
81 d->access->error("nbsd_read: pci_bus_conf_read() failed");
89 *(u16*)buf = cpu_to_le16(val >> shift);
92 *(u32*)buf = cpu_to_le32(val);
99 nbsd_write(struct pci_dev *d, int pos, byte *buf, int len)
104 if (!(len == 1 || len == 2 || len == 4))
105 return pci_generic_block_write(d, pos, buf, len);
107 if (d->domain || pos >= 256)
111 * BEWARE: NetBSD seems to support only 32-bit access, so we have
112 * to emulate byte and word writes by read-modify-write, possibly
120 if (pcibus_conf_read(d->access->fd, d->bus, d->dev, d->func, pos, &val) < 0)
121 d->access->error("nbsd_write: pci_bus_conf_read() failed");
127 val = (val & ~(0xff << shift)) | (buf[0] << shift);
130 val = (val & ~(0xffff << shift)) | (le16_to_cpu(*(u16*)buf) << shift);
133 val = le32_to_cpu(*(u32*)buf);
137 if (pcibus_conf_write(d->access->fd, d->bus, d->dev, d->func, pos, val) < 0)
138 d->access->error("nbsd_write: pci_bus_conf_write() failed");
143 struct pci_methods pm_nbsd_libpci = {
151 pci_generic_fill_info,
156 NULL /* dev_cleanup */