mii.c revision 141937
150120Swpaul/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */ 250120Swpaul 350120Swpaul/*- 450120Swpaul * Copyright (c) 1998 The NetBSD Foundation, Inc. 550120Swpaul * All rights reserved. 650120Swpaul * 750120Swpaul * This code is derived from software contributed to The NetBSD Foundation 850120Swpaul * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 950120Swpaul * NASA Ames Research Center. 1050120Swpaul * 1150120Swpaul * Redistribution and use in source and binary forms, with or without 1250120Swpaul * modification, are permitted provided that the following conditions 1350120Swpaul * are met: 1450120Swpaul * 1. Redistributions of source code must retain the above copyright 1550120Swpaul * notice, this list of conditions and the following disclaimer. 1650120Swpaul * 2. Redistributions in binary form must reproduce the above copyright 1750120Swpaul * notice, this list of conditions and the following disclaimer in the 1850120Swpaul * documentation and/or other materials provided with the distribution. 1950120Swpaul * 3. All advertising materials mentioning features or use of this software 2050120Swpaul * must display the following acknowledgement: 2150120Swpaul * This product includes software developed by the NetBSD 2250120Swpaul * Foundation, Inc. and its contributors. 2350120Swpaul * 4. Neither the name of The NetBSD Foundation nor the names of its 2450120Swpaul * contributors may be used to endorse or promote products derived 2550120Swpaul * from this software without specific prior written permission. 2650120Swpaul * 2750120Swpaul * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 2850120Swpaul * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2950120Swpaul * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 3050120Swpaul * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 3150120Swpaul * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 3250120Swpaul * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 3350120Swpaul * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 3450120Swpaul * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 3550120Swpaul * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3650120Swpaul * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3750120Swpaul * POSSIBILITY OF SUCH DAMAGE. 3850120Swpaul */ 3950120Swpaul 40119418Sobrien#include <sys/cdefs.h> 41119418Sobrien__FBSDID("$FreeBSD: head/sys/dev/mii/mii.c 141937 2005-02-15 06:02:34Z imp $"); 42119418Sobrien 4350120Swpaul/* 4450120Swpaul * MII bus layer, glues MII-capable network interface drivers to sharable 4550120Swpaul * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, 4650120Swpaul * plus some NetBSD extensions. 4750120Swpaul */ 4850120Swpaul 4950120Swpaul#include <sys/param.h> 5050120Swpaul#include <sys/systm.h> 5150120Swpaul#include <sys/socket.h> 5250120Swpaul#include <sys/malloc.h> 5350120Swpaul#include <sys/module.h> 5450120Swpaul#include <sys/bus.h> 5550120Swpaul 5650120Swpaul#include <net/if.h> 5750120Swpaul#include <net/if_media.h> 58128871Sandre#include <net/route.h> 5950120Swpaul 6050120Swpaul#include <dev/mii/mii.h> 6150120Swpaul#include <dev/mii/miivar.h> 6250120Swpaul 6359757SpeterMODULE_VERSION(miibus, 1); 6459757Speter 6550120Swpaul#include "miibus_if.h" 6650120Swpaul 67105135Salfredstatic int miibus_readreg(device_t, int, int); 68105135Salfredstatic int miibus_writereg(device_t, int, int, int); 69105135Salfredstatic void miibus_statchg(device_t); 70105135Salfredstatic void miibus_linkchg(device_t); 71105135Salfredstatic void miibus_mediainit(device_t); 7250120Swpaul 7350120Swpaulstatic device_method_t miibus_methods[] = { 7450120Swpaul /* device interface */ 7550120Swpaul DEVMETHOD(device_probe, miibus_probe), 7650120Swpaul DEVMETHOD(device_attach, miibus_attach), 7750120Swpaul DEVMETHOD(device_detach, miibus_detach), 7850120Swpaul DEVMETHOD(device_shutdown, bus_generic_shutdown), 7950120Swpaul 8050120Swpaul /* bus interface */ 8150120Swpaul DEVMETHOD(bus_print_child, bus_generic_print_child), 8250120Swpaul DEVMETHOD(bus_driver_added, bus_generic_driver_added), 8350120Swpaul 8450120Swpaul /* MII interface */ 8550120Swpaul DEVMETHOD(miibus_readreg, miibus_readreg), 8650120Swpaul DEVMETHOD(miibus_writereg, miibus_writereg), 8750120Swpaul DEVMETHOD(miibus_statchg, miibus_statchg), 8884140Sjlemon DEVMETHOD(miibus_linkchg, miibus_linkchg), 8950120Swpaul DEVMETHOD(miibus_mediainit, miibus_mediainit), 9050120Swpaul 9150120Swpaul { 0, 0 } 9250120Swpaul}; 9350120Swpaul 9450120Swpauldevclass_t miibus_devclass; 9550120Swpaul 9650120Swpauldriver_t miibus_driver = { 9750120Swpaul "miibus", 9850120Swpaul miibus_methods, 9950120Swpaul sizeof(struct mii_data) 10050120Swpaul}; 10150120Swpaul 10250120Swpaul/* 10350120Swpaul * Helper function used by network interface drivers, attaches PHYs 10450120Swpaul * to the network interface driver parent. 10550120Swpaul */ 106105135Salfredint 107141937Simpmiibus_probe(device_t dev) 10850120Swpaul{ 10950120Swpaul struct mii_attach_args ma, *args; 11050120Swpaul struct mii_data *mii; 111102000Sambrisko device_t child = NULL, parent; 112102000Sambrisko int bmsr, capmask = 0xFFFFFFFF; 11350120Swpaul 11450120Swpaul mii = device_get_softc(dev); 11550120Swpaul parent = device_get_parent(dev); 11650120Swpaul LIST_INIT(&mii->mii_phys); 11750120Swpaul 11850120Swpaul for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 11950120Swpaul /* 12050120Swpaul * Check to see if there is a PHY at this address. Note, 12150120Swpaul * many braindead PHYs report 0/0 in their ID registers, 12250120Swpaul * so we test for media in the BMSR. 12350120Swpaul */ 12450120Swpaul bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 12550120Swpaul if (bmsr == 0 || bmsr == 0xffff || 126138124Sbz (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 12750120Swpaul /* Assume no PHY at this address. */ 12850120Swpaul continue; 12950120Swpaul } 13050120Swpaul 13150120Swpaul /* 13250120Swpaul * Extract the IDs. Braindead PHYs will be handled by 13350120Swpaul * the `ukphy' driver, as we have no ID information to 13450120Swpaul * match on. 13550120Swpaul */ 13650120Swpaul ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 13750120Swpaul MII_PHYIDR1); 13850120Swpaul ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 13950120Swpaul MII_PHYIDR2); 14050120Swpaul 14150120Swpaul ma.mii_data = mii; 14250120Swpaul ma.mii_capmask = capmask; 14350120Swpaul 14450120Swpaul args = malloc(sizeof(struct mii_attach_args), 14550120Swpaul M_DEVBUF, M_NOWAIT); 14650120Swpaul bcopy((char *)&ma, (char *)args, sizeof(ma)); 14754073Smdodd child = device_add_child(dev, NULL, -1); 14854073Smdodd device_set_ivars(child, args); 14950120Swpaul } 15050120Swpaul 15150391Swpaul if (child == NULL) 15250120Swpaul return(ENXIO); 15350120Swpaul 15450120Swpaul device_set_desc(dev, "MII bus"); 15550120Swpaul 15650120Swpaul return(0); 15750120Swpaul} 15850120Swpaul 159105135Salfredint 160141937Simpmiibus_attach(device_t dev) 16150120Swpaul{ 16250120Swpaul void **v; 16350120Swpaul ifm_change_cb_t ifmedia_upd; 16450120Swpaul ifm_stat_cb_t ifmedia_sts; 16550120Swpaul struct mii_data *mii; 16650120Swpaul 16750120Swpaul mii = device_get_softc(dev); 16884333Smjacob /* 16984333Smjacob * Note that each NIC's softc must start with an ifnet structure. 17084333Smjacob */ 17150120Swpaul mii->mii_ifp = device_get_softc(device_get_parent(dev)); 17250120Swpaul v = device_get_ivars(dev); 17350120Swpaul ifmedia_upd = v[0]; 17450120Swpaul ifmedia_sts = v[1]; 17550120Swpaul ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 17650120Swpaul bus_generic_attach(dev); 17750120Swpaul 17850120Swpaul return(0); 17950120Swpaul} 18050120Swpaul 181105135Salfredint 182141937Simpmiibus_detach(device_t dev) 18350120Swpaul{ 18450120Swpaul struct mii_data *mii; 18550120Swpaul 18650120Swpaul bus_generic_detach(dev); 18750120Swpaul mii = device_get_softc(dev); 18850120Swpaul ifmedia_removeall(&mii->mii_media); 18950120Swpaul mii->mii_ifp = NULL; 19050120Swpaul 19150120Swpaul return(0); 19250120Swpaul} 19350120Swpaul 194105135Salfredstatic int 195141937Simpmiibus_readreg(device_t dev, int phy, int reg) 19650120Swpaul{ 19750120Swpaul device_t parent; 19850120Swpaul 19950120Swpaul parent = device_get_parent(dev); 20050120Swpaul return(MIIBUS_READREG(parent, phy, reg)); 20150120Swpaul} 20250120Swpaul 203105135Salfredstatic int 204141937Simpmiibus_writereg(device_t dev, int phy, int reg, int data) 20550120Swpaul{ 20650120Swpaul device_t parent; 20750120Swpaul 20850120Swpaul parent = device_get_parent(dev); 20950120Swpaul return(MIIBUS_WRITEREG(parent, phy, reg, data)); 21050120Swpaul} 21150120Swpaul 212105135Salfredstatic void 213141937Simpmiibus_statchg(device_t dev) 21450120Swpaul{ 21550120Swpaul device_t parent; 21650120Swpaul 21750120Swpaul parent = device_get_parent(dev); 21850120Swpaul MIIBUS_STATCHG(parent); 21950120Swpaul return; 22050120Swpaul} 22150120Swpaul 22284140Sjlemonstatic void 223141937Simpmiibus_linkchg(device_t dev) 22484140Sjlemon{ 225138542Ssam struct mii_data *mii; 226138542Ssam device_t parent; 227138542Ssam int link_state; 22884140Sjlemon 22984140Sjlemon parent = device_get_parent(dev); 23084140Sjlemon MIIBUS_LINKCHG(parent); 23184140Sjlemon 23284140Sjlemon mii = device_get_softc(dev); 23384140Sjlemon 23484140Sjlemon if (mii->mii_media_status & IFM_AVALID) { 235138542Ssam if (mii->mii_media_status & IFM_ACTIVE) 236128871Sandre link_state = LINK_STATE_UP; 237138542Ssam else 238128871Sandre link_state = LINK_STATE_DOWN; 239138542Ssam } else 240128871Sandre link_state = LINK_STATE_UNKNOWN; 241138542Ssam /* 242138542Ssam * Note that each NIC's softc must start with an ifnet structure. 243138542Ssam */ 244138542Ssam if_link_state_change(device_get_softc(parent), link_state); 24584140Sjlemon} 24684140Sjlemon 247105135Salfredstatic void 248141937Simpmiibus_mediainit(device_t dev) 24950120Swpaul{ 25050120Swpaul struct mii_data *mii; 25150120Swpaul struct ifmedia_entry *m; 25250120Swpaul int media = 0; 25350120Swpaul 25450577Swpaul /* Poke the parent in case it has any media of its own to add. */ 25550577Swpaul MIIBUS_MEDIAINIT(device_get_parent(dev)); 25650577Swpaul 25750120Swpaul mii = device_get_softc(dev); 25872012Sphk LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) { 25950120Swpaul media = m->ifm_media; 26050120Swpaul if (media == (IFM_ETHER|IFM_AUTO)) 26150120Swpaul break; 26250120Swpaul } 26350120Swpaul 26450120Swpaul ifmedia_set(&mii->mii_media, media); 26550120Swpaul 26650120Swpaul return; 26750120Swpaul} 26850120Swpaul 269105135Salfredint 270141937Simpmii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd, 271141937Simp ifm_stat_cb_t ifmedia_sts) 27250120Swpaul{ 27350120Swpaul void **v; 27450120Swpaul int bmsr, i; 27550120Swpaul 27650120Swpaul v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT); 27784333Smjacob if (v == 0) { 27884333Smjacob return (ENOMEM); 27984333Smjacob } 28050120Swpaul v[0] = ifmedia_upd; 28150120Swpaul v[1] = ifmedia_sts; 28254073Smdodd *child = device_add_child(dev, "miibus", -1); 28354073Smdodd device_set_ivars(*child, v); 28450120Swpaul 28550120Swpaul for (i = 0; i < MII_NPHY; i++) { 28650120Swpaul bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 28750120Swpaul if (bmsr == 0 || bmsr == 0xffff || 288138124Sbz (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 28950120Swpaul /* Assume no PHY at this address. */ 29050120Swpaul continue; 29150120Swpaul } else 29250120Swpaul break; 29350120Swpaul } 29450120Swpaul 29550120Swpaul if (i == MII_NPHY) { 29650120Swpaul device_delete_child(dev, *child); 29750120Swpaul *child = NULL; 29850120Swpaul return(ENXIO); 29950120Swpaul } 30050120Swpaul 30150120Swpaul bus_generic_attach(dev); 30250120Swpaul 30350120Swpaul return(0); 30450120Swpaul} 30550120Swpaul 30650120Swpaul/* 30750120Swpaul * Media changed; notify all PHYs. 30850120Swpaul */ 30950120Swpaulint 310141937Simpmii_mediachg(struct mii_data *mii) 31150120Swpaul{ 31250120Swpaul struct mii_softc *child; 31350120Swpaul int rv; 31450120Swpaul 31550120Swpaul mii->mii_media_status = 0; 31650120Swpaul mii->mii_media_active = IFM_NONE; 31750120Swpaul 31872012Sphk LIST_FOREACH(child, &mii->mii_phys, mii_list) { 31950120Swpaul rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 32050120Swpaul if (rv) 32150120Swpaul return (rv); 32250120Swpaul } 32350120Swpaul return (0); 32450120Swpaul} 32550120Swpaul 32650120Swpaul/* 32750120Swpaul * Call the PHY tick routines, used during autonegotiation. 32850120Swpaul */ 32950120Swpaulvoid 330141937Simpmii_tick(struct mii_data *mii) 33150120Swpaul{ 33250120Swpaul struct mii_softc *child; 33350120Swpaul 33472012Sphk LIST_FOREACH(child, &mii->mii_phys, mii_list) 33550120Swpaul (void) (*child->mii_service)(child, mii, MII_TICK); 33650120Swpaul} 33750120Swpaul 33850120Swpaul/* 33950120Swpaul * Get media status from PHYs. 34050120Swpaul */ 34150120Swpaulvoid 342141937Simpmii_pollstat(struct mii_data *mii) 34350120Swpaul{ 34450120Swpaul struct mii_softc *child; 34550120Swpaul 34650120Swpaul mii->mii_media_status = 0; 34750120Swpaul mii->mii_media_active = IFM_NONE; 34850120Swpaul 34972012Sphk LIST_FOREACH(child, &mii->mii_phys, mii_list) 35050120Swpaul (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 35150120Swpaul} 35295722Sphk 35395722Sphk/* 35495722Sphk * Inform the PHYs that the interface is down. 35595722Sphk */ 35695722Sphkvoid 35795722Sphkmii_down(struct mii_data *mii) 35895722Sphk{ 35995722Sphk struct mii_softc *child; 36095722Sphk 36195722Sphk LIST_FOREACH(child, &mii->mii_phys, mii_list) 36295722Sphk mii_phy_down(child); 36395722Sphk} 364