Annotation of sys/dev/pci/if_xl_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_xl_pci.c,v 1.22 2006/08/10 20:10:19 brad Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1997, 1998, 1999
! 5: * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Bill Paul.
! 18: * 4. Neither the name of the author nor the names of any co-contributors
! 19: * may be used to endorse or promote products derived from this software
! 20: * without specific prior written permission.
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
! 23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 25: * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
! 26: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 27: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 28: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 29: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 30: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 31: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
! 32: * THE POSSIBILITY OF SUCH DAMAGE.
! 33: *
! 34: * $FreeBSD: if_xl.c,v 1.72 2000/01/09 21:12:59 wpaul Exp $
! 35: */
! 36:
! 37: #include "bpfilter.h"
! 38:
! 39: #include <sys/param.h>
! 40: #include <sys/systm.h>
! 41: #include <sys/mbuf.h>
! 42: #include <sys/protosw.h>
! 43: #include <sys/socket.h>
! 44: #include <sys/ioctl.h>
! 45: #include <sys/errno.h>
! 46: #include <sys/malloc.h>
! 47: #include <sys/kernel.h>
! 48: #include <sys/proc.h> /* only for declaration of wakeup() used by vm.h */
! 49: #include <sys/device.h>
! 50:
! 51: #include <net/if.h>
! 52: #include <net/if_dl.h>
! 53: #include <net/if_types.h>
! 54: #include <net/if_media.h>
! 55:
! 56: #ifdef INET
! 57: #include <netinet/in.h>
! 58: #include <netinet/in_systm.h>
! 59: #include <netinet/in_var.h>
! 60: #include <netinet/ip.h>
! 61: #include <netinet/if_ether.h>
! 62: #endif
! 63:
! 64: #include <dev/mii/mii.h>
! 65: #include <dev/mii/miivar.h>
! 66: #include <dev/pci/pcireg.h>
! 67: #include <dev/pci/pcivar.h>
! 68: #include <dev/pci/pcidevs.h>
! 69:
! 70: #if NBPFILTER > 0
! 71: #include <net/bpf.h>
! 72: #endif
! 73:
! 74: /*
! 75: * The following #define causes the code to use PIO to access the
! 76: * chip's registers instead of memory mapped mode. The reason PIO mode
! 77: * is on by default is that the Etherlink XL manual seems to indicate
! 78: * that only the newer revision chips (3c905B) support both PIO and
! 79: * memory mapped access. Since we want to be compatible with the older
! 80: * bus master chips, we use PIO here. If you comment this out, the
! 81: * driver will use memory mapped I/O, which may be faster but which
! 82: * might not work on some devices.
! 83: */
! 84: #define XL_USEIOSPACE
! 85:
! 86: #define XL_PCI_FUNCMEM 0x0018
! 87: #define XL_PCI_INTR 0x0004
! 88: #define XL_PCI_INTRACK 0x8000
! 89:
! 90: #include <dev/ic/xlreg.h>
! 91:
! 92: int xl_pci_match(struct device *, void *, void *);
! 93: void xl_pci_attach(struct device *, struct device *, void *);
! 94: void xl_pci_intr_ack(struct xl_softc *);
! 95:
! 96: struct cfattach xl_pci_ca = {
! 97: sizeof(struct xl_softc), xl_pci_match, xl_pci_attach,
! 98: };
! 99:
! 100: const struct pci_matchid xl_pci_devices[] = {
! 101: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3CSOHO100TX },
! 102: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900TPO },
! 103: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900COMBO },
! 104: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900B },
! 105: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900BCOMBO },
! 106: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900BTPC },
! 107: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C900BFL },
! 108: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905TX },
! 109: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905T4 },
! 110: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905BTX },
! 111: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905BT4 },
! 112: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905BCOMBO },
! 113: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905BFX },
! 114: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C980TX },
! 115: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C980CTX },
! 116: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C905CTX },
! 117: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C450 },
! 118: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C555 },
! 119: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C556 },
! 120: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C556B },
! 121: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C9201 },
! 122: { PCI_VENDOR_3COM, PCI_PRODUCT_3COM_3C920BEMBW },
! 123: };
! 124:
! 125: int
! 126: xl_pci_match(struct device *parent, void *match, void *aux)
! 127: {
! 128: return (pci_matchbyid((struct pci_attach_args *)aux, xl_pci_devices,
! 129: sizeof(xl_pci_devices)/sizeof(xl_pci_devices[0])));
! 130: }
! 131:
! 132: void
! 133: xl_pci_attach(struct device *parent, struct device *self, void *aux)
! 134: {
! 135: struct xl_softc *sc = (struct xl_softc *)self;
! 136: struct pci_attach_args *pa = aux;
! 137: pci_chipset_tag_t pc = pa->pa_pc;
! 138: pci_intr_handle_t ih;
! 139: const char *intrstr = NULL;
! 140: bus_size_t iosize, funsize;
! 141: u_int32_t command;
! 142:
! 143: sc->sc_dmat = pa->pa_dmat;
! 144:
! 145: sc->xl_flags = 0;
! 146:
! 147: /* set required flags */
! 148: switch (PCI_PRODUCT(pa->pa_id)) {
! 149: case TC_DEVICEID_HURRICANE_555:
! 150: sc->xl_flags |= XL_FLAG_EEPROM_OFFSET_30 | XL_FLAG_8BITROM;
! 151: break;
! 152: case TC_DEVICEID_HURRICANE_556:
! 153: sc->xl_flags |= XL_FLAG_FUNCREG | XL_FLAG_PHYOK |
! 154: XL_FLAG_EEPROM_OFFSET_30 | XL_FLAG_WEIRDRESET;
! 155: sc->xl_flags |= XL_FLAG_INVERT_LED_PWR|XL_FLAG_INVERT_MII_PWR;
! 156: sc->xl_flags |= XL_FLAG_8BITROM;
! 157: break;
! 158: case TC_DEVICEID_HURRICANE_556B:
! 159: sc->xl_flags |= XL_FLAG_FUNCREG | XL_FLAG_PHYOK |
! 160: XL_FLAG_EEPROM_OFFSET_30 | XL_FLAG_WEIRDRESET;
! 161: sc->xl_flags |= XL_FLAG_INVERT_LED_PWR|XL_FLAG_INVERT_MII_PWR;
! 162: break;
! 163: case PCI_PRODUCT_3COM_3C9201:
! 164: case PCI_PRODUCT_3COM_3C920BEMBW:
! 165: sc->xl_flags |= XL_FLAG_PHYOK;
! 166: break;
! 167: case TC_DEVICEID_BOOMERANG_10_100BT:
! 168: sc->xl_flags |= XL_FLAG_NO_MMIO;
! 169: break;
! 170: default:
! 171: break;
! 172: }
! 173:
! 174: /*
! 175: * If this is a 3c905B, we have to check one extra thing.
! 176: * The 905B supports power management and may be placed in
! 177: * a low-power mode (D3 mode), typically by certain operating
! 178: * systems which shall not be named. The PCI BIOS is supposed
! 179: * to reset the NIC and bring it out of low-power mode, but
! 180: * some do not. Consequently, we have to see if this chip
! 181: * supports power management, and if so, make sure it's not
! 182: * in low-power mode. If power management is available, the
! 183: * capid byte will be 0x01.
! 184: *
! 185: * I _think_ that what actually happens is that the chip
! 186: * loses its PCI configuration during the transition from
! 187: * D3 back to D0; this means that it should be possible for
! 188: * us to save the PCI iobase, membase and IRQ, put the chip
! 189: * back in the D0 state, then restore the PCI config ourselves.
! 190: */
! 191: command = pci_conf_read(pc, pa->pa_tag, XL_PCI_CAPID) & 0xff;
! 192: if (command == 0x01) {
! 193:
! 194: command = pci_conf_read(pc, pa->pa_tag,
! 195: XL_PCI_PWRMGMTCTRL);
! 196: if (command & XL_PSTATE_MASK) {
! 197: u_int32_t io, mem, irq;
! 198:
! 199: /* Save PCI config */
! 200: io = pci_conf_read(pc, pa->pa_tag, XL_PCI_LOIO);
! 201: mem = pci_conf_read(pc, pa->pa_tag, XL_PCI_LOMEM);
! 202: irq = pci_conf_read(pc, pa->pa_tag, XL_PCI_INTLINE);
! 203:
! 204: /* Reset the power state. */
! 205: printf("%s: chip is in D%d power mode "
! 206: "-- setting to D0\n",
! 207: sc->sc_dev.dv_xname, command & XL_PSTATE_MASK);
! 208: command &= 0xFFFFFFFC;
! 209: pci_conf_write(pc, pa->pa_tag,
! 210: XL_PCI_PWRMGMTCTRL, command);
! 211:
! 212: pci_conf_write(pc, pa->pa_tag, XL_PCI_LOIO, io);
! 213: pci_conf_write(pc, pa->pa_tag, XL_PCI_LOMEM, mem);
! 214: pci_conf_write(pc, pa->pa_tag, XL_PCI_INTLINE, irq);
! 215: }
! 216: }
! 217:
! 218: /*
! 219: * Map control/status registers.
! 220: */
! 221: #ifdef XL_USEIOSPACE
! 222: if (pci_mapreg_map(pa, XL_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0,
! 223: &sc->xl_btag, &sc->xl_bhandle, NULL, &iosize, 0)) {
! 224: printf(": can't map i/o space\n");
! 225: return;
! 226: }
! 227: #else
! 228: if (pci_mapreg_map(pa, XL_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0,
! 229: &sc->xl_btag, &sc->xl_bhandle, NULL, &iosize, 0)) {
! 230: printf(": can't map i/o space\n");
! 231: return;
! 232: }
! 233: #endif
! 234:
! 235: if (sc->xl_flags & XL_FLAG_FUNCREG) {
! 236: if (pci_mapreg_map(pa, XL_PCI_FUNCMEM, PCI_MAPREG_TYPE_MEM, 0,
! 237: &sc->xl_funct, &sc->xl_funch, NULL, &funsize, 0)) {
! 238: printf(": can't map i/o space\n");
! 239: bus_space_unmap(sc->xl_btag, sc->xl_bhandle, iosize);
! 240: return;
! 241: }
! 242: sc->intr_ack = xl_pci_intr_ack;
! 243: }
! 244:
! 245: /*
! 246: * Allocate our interrupt.
! 247: */
! 248: if (pci_intr_map(pa, &ih)) {
! 249: printf(": couldn't map interrupt\n");
! 250: bus_space_unmap(sc->xl_btag, sc->xl_bhandle, iosize);
! 251: if (sc->xl_flags & XL_FLAG_FUNCREG)
! 252: bus_space_unmap(sc->xl_funct, sc->xl_funch, funsize);
! 253: return;
! 254: }
! 255:
! 256: intrstr = pci_intr_string(pc, ih);
! 257: sc->xl_intrhand = pci_intr_establish(pc, ih, IPL_NET, xl_intr, sc,
! 258: self->dv_xname);
! 259: if (sc->xl_intrhand == NULL) {
! 260: printf(": couldn't establish interrupt");
! 261: if (intrstr != NULL)
! 262: printf(" at %s", intrstr);
! 263: bus_space_unmap(sc->xl_btag, sc->xl_bhandle, iosize);
! 264: if (sc->xl_flags & XL_FLAG_FUNCREG)
! 265: bus_space_unmap(sc->xl_funct, sc->xl_funch, funsize);
! 266: return;
! 267: }
! 268: printf(": %s", intrstr);
! 269:
! 270: xl_attach(sc);
! 271: }
! 272:
! 273:
! 274: void
! 275: xl_pci_intr_ack(struct xl_softc *sc)
! 276: {
! 277: bus_space_write_4(sc->xl_funct, sc->xl_funch, XL_PCI_INTR,
! 278: XL_PCI_INTRACK);
! 279: }
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