Annotation of embedaddon/pciutils/lib/obsd-device.c, revision 1.1
1.1 ! misho 1: /*
! 2: * The PCI Library -- OpenBSD /dev/pci access
! 3: *
! 4: * Adapted from fbsd-device.c by Matthieu Herrb <matthieu.herrb@laas.fr>, 2006
! 5: *
! 6: * Can be freely distributed and used under the terms of the GNU GPL.
! 7: */
! 8:
! 9: #include <fcntl.h>
! 10: #include <string.h>
! 11: #include <unistd.h>
! 12: #include <errno.h>
! 13: #include <sys/endian.h>
! 14: #include <sys/types.h>
! 15: #include <sys/ioctl.h>
! 16: #include <sys/pciio.h>
! 17: #include "internal.h"
! 18:
! 19: static void
! 20: obsd_config(struct pci_access *a)
! 21: {
! 22: pci_define_param(a, "obsd.path", PCI_PATH_OBSD_DEVICE, "Path to the OpenBSD PCI device");
! 23: }
! 24:
! 25: static int
! 26: obsd_detect(struct pci_access *a)
! 27: {
! 28: char *name = pci_get_param(a, "obsd.path");
! 29:
! 30: if (access(name, R_OK))
! 31: {
! 32: a->warning("Cannot open %s", name);
! 33: return 0;
! 34: }
! 35: a->debug("...using %s", name);
! 36: return 1;
! 37: }
! 38:
! 39: static void
! 40: obsd_init(struct pci_access *a)
! 41: {
! 42: char *name = pci_get_param(a, "obsd.path");
! 43:
! 44: a->fd = open(name, O_RDWR, 0);
! 45: if (a->fd < 0)
! 46: a->error("obsd_init: %s open failed", name);
! 47: }
! 48:
! 49: static void
! 50: obsd_cleanup(struct pci_access *a)
! 51: {
! 52: close(a->fd);
! 53: }
! 54:
! 55: static int
! 56: obsd_read(struct pci_dev *d, int pos, byte *buf, int len)
! 57: {
! 58: struct pci_io pi;
! 59: union {
! 60: u_int32_t u32;
! 61: u_int16_t u16[2];
! 62: u_int8_t u8[4];
! 63: } u;
! 64:
! 65: if (!(len == 1 || len == 2 || len == 4))
! 66: return pci_generic_block_read(d, pos, buf, len);
! 67:
! 68: if (pos >= 256)
! 69: return 0;
! 70:
! 71: pi.pi_sel.pc_bus = d->bus;
! 72: pi.pi_sel.pc_dev = d->dev;
! 73: pi.pi_sel.pc_func = d->func;
! 74:
! 75: pi.pi_reg = pos - (pos % 4);
! 76: pi.pi_width = 4;
! 77:
! 78: if (ioctl(d->access->fd, PCIOCREAD, &pi) < 0) {
! 79: if (errno == ENXIO)
! 80: pi.pi_data = 0xffffffff;
! 81: else
! 82: d->access->error("obsd_read: ioctl(PCIOCREAD) failed");
! 83: }
! 84: u.u32 = pi.pi_data;
! 85:
! 86: switch (len)
! 87: {
! 88: case 1:
! 89: buf[0] = (u8) u.u8[pos % 4];
! 90: break;
! 91: case 2:
! 92: ((u16 *) buf)[0] = letoh16(u.u16[(pos % 4) / 2]);
! 93: break;
! 94: case 4:
! 95: ((u32 *) buf)[0] = (u32) letoh32(pi.pi_data);
! 96: break;
! 97: }
! 98: return 1;
! 99: }
! 100:
! 101: static int
! 102: obsd_write(struct pci_dev *d, int pos, byte *buf, int len)
! 103: {
! 104: struct pci_io pi;
! 105:
! 106: if (!(len == 1 || len == 2 || len == 4))
! 107: return pci_generic_block_write(d, pos, buf, len);
! 108:
! 109: if (pos >= 256)
! 110: return 0;
! 111:
! 112: pi.pi_sel.pc_bus = d->bus;
! 113: pi.pi_sel.pc_dev = d->dev;
! 114: pi.pi_sel.pc_func = d->func;
! 115:
! 116: pi.pi_reg = pos;
! 117: pi.pi_width = len;
! 118:
! 119: switch (len)
! 120: {
! 121: case 1:
! 122: pi.pi_data = buf[0];
! 123: break;
! 124: case 2:
! 125: pi.pi_data = ((u16 *) buf)[0];
! 126: break;
! 127: case 4:
! 128: pi.pi_data = ((u32 *) buf)[0];
! 129: break;
! 130: }
! 131:
! 132: if (ioctl(d->access->fd, PCIOCWRITE, &pi) < 0)
! 133: d->access->error("obsd_write: ioctl(PCIOCWRITE) failed");
! 134:
! 135: return 1;
! 136: }
! 137:
! 138: struct pci_methods pm_obsd_device = {
! 139: "obsd-device",
! 140: "/dev/pci on OpenBSD",
! 141: obsd_config,
! 142: obsd_detect,
! 143: obsd_init,
! 144: obsd_cleanup,
! 145: pci_generic_scan,
! 146: pci_generic_fill_info,
! 147: obsd_read,
! 148: obsd_write,
! 149: NULL, /* read_vpd */
! 150: NULL, /* dev_init */
! 151: NULL /* dev_cleanup */
! 152: };
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