root/dev/sbus/qec.c

DEFINITIONS

1. qecprint
2. qecmatch
3. qecattach
4. qec_bus_map
5. qec_intr_establish
6. qec_init
7. qec_meminit

    1 /*      $OpenBSD: qec.c,v 1.10 2006/06/02 20:00:56 miod Exp $   */
    2 /*      $NetBSD: qec.c,v 1.12 2000/12/04 20:12:55 fvdl Exp $ */
    4 /*-
    5  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Paul Kranenburg.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *        This product includes software developed by the NetBSD
   22  *        Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   40 #include <sys/types.h>
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/kernel.h>
   44 #include <sys/errno.h>
   45 #include <sys/device.h>
   46 #include <sys/malloc.h>
   48 #include <machine/bus.h>
   49 #include <machine/intr.h>
   50 #include <machine/autoconf.h>
   52 #include <dev/sbus/sbusvar.h>
   53 #include <dev/sbus/qecreg.h>
   54 #include <dev/sbus/qecvar.h>
   56 int     qecprint(void *, const char *);
   57 int     qecmatch(struct device *, void *, void *);
   58 void    qecattach(struct device *, struct device *, void *);
   59 void    qec_init(struct qec_softc *);
   61 int     qec_bus_map(
bus_space_tag_t,
bus_space_tag_t,
bus_addr_t,             /*offset*/
bus_size_t,             /*size*/
   66                 int,                    /*flags*/
bus_space_handle_t *);
   68 void *  qec_intr_establish(
bus_space_tag_t,
bus_space_tag_t,
   71                 int,                    /*bus interrupt priority*/
   72                 int,                    /*`device class' interrupt level*/
   73                 int,                    /*flags*/
   74                 int (*)(void *),        /*handler*/
   75                 void *,                 /*arg*/
   76                 const char *);          /*what*/
   78 struct cfattach qec_ca = {
   79         sizeof(struct qec_softc), qecmatch, qecattach
   80 };
   82 struct cfdriver qec_cd = {
NULL, "qec", DV_DULL
   84 };
   86 int
qecprint(aux, busname)
   88         void *aux;
   89         const char *busname;
   90 {
   91         struct sbus_attach_args *sa = aux;
bus_space_tag_t t = sa->sa_bustag;
   93         struct qec_softc *sc = t->cookie;
sa->sa_bustag = sc->sc_bustag;  /* XXX */
sbus_print(aux, busname);       /* XXX */
sa->sa_bustag = t;              /* XXX */
   98         return (UNCONF);
   99 }
  101 int
qecmatch(parent, vcf, aux)
  103         struct device *parent;
  104         void *vcf;
  105         void *aux;
  106 {
  107         struct cfdata *cf = vcf;
  108         struct sbus_attach_args *sa = aux;
  110         return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
  111 }
  113 /*
  114  * Attach all the sub-devices we can find
  115  */
  116 void
qecattach(parent, self, aux)
  118         struct device *parent, *self;
  119         void *aux;
  120 {
  121         struct sbus_attach_args *sa = aux;
  122         struct qec_softc *sc = (void *)self;
  123         int node;
  124         int sbusburst;
  125         struct sparc_bus_space_tag *sbt;
bus_space_handle_t bh;
  127         int error;
sc->sc_bustag = sa->sa_bustag;
sc->sc_dmatag = sa->sa_dmatag;
node = sa->sa_node;
  133         if (sa->sa_nreg < 2) {
printf("%s: only %d register sets\n",
self->dv_xname, sa->sa_nreg);
  136                 return;
  137         }
  139         if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[0].sbr_slot,
sa->sa_reg[0].sbr_offset, sa->sa_reg[0].sbr_size,
  141             0, 0, &sc->sc_regs) != 0) {
printf("%s: attach: cannot map registers\n", self->dv_xname);
  143                 return;
  144         }
  146         /*
  147          * This device's "register space 1" is just a buffer where the
  148          * Lance ring-buffers can be stored. Note the buffer's location
  149          * and size, so the child driver can pick them up.
  150          */
  151         if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[1].sbr_slot,
sa->sa_reg[1].sbr_offset, sa->sa_reg[1].sbr_size, 0, 0, &bh) != 0) {
printf("%s: attach: cannot map registers\n", self->dv_xname);
  154                 return;
  155         }
sc->sc_buffer = (caddr_t)bus_space_vaddr(sc->sc_bustag, bh);
sc->sc_bufsiz = (bus_size_t)sa->sa_reg[1].sbr_size;
  159         /* Get number of on-board channels */
sc->sc_nchannels = getpropint(node, "#channels", -1);
  161         if (sc->sc_nchannels == -1) {
printf(": no channels\n");
  163                 return;
  164         }
  166         /*
  167          * Get transfer burst size from PROM
  168          */
sbusburst = ((struct sbus_softc *)parent)->sc_burst;
  170         if (sbusburst == 0)
sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
sc->sc_burst = getpropint(node, "burst-sizes", -1);
  174         if (sc->sc_burst == -1)
  175                 /* take SBus burst sizes */
sc->sc_burst = sbusburst;
  178         /* Clamp at parent's burst sizes */
sc->sc_burst &= sbusburst;
  181         /*
  182          * Collect address translations from the OBP.
  183          */
error = getprop(node, "ranges", sizeof(struct sbus_range),
  185                          &sc->sc_nrange, (void **)&sc->sc_range);
  186         switch (error) {
  187         case 0:
  188                 break;
  189         case ENOENT:
  190         default:
panic("%s: error getting ranges property", self->dv_xname);
  192         }
  194         /* Allocate a bus tag */
sbt = malloc(sizeof(*sbt), M_DEVBUF, M_NOWAIT);
  196         if (sbt == NULL) {
printf("%s: attach: out of memory\n", self->dv_xname);
  198                 return;
  199         }
bzero(sbt, sizeof *sbt);
strlcpy(sbt->name, sc->sc_dev.dv_xname, sizeof(sbt->name));
sbt->cookie = sc;
sbt->parent = sc->sc_bustag;
sbt->asi = sbt->parent->asi;
sbt->sasi = sbt->parent->sasi;
sbt->sparc_bus_map = qec_bus_map;
sbt->sparc_intr_establish = qec_intr_establish;
  210         /*
  211          * Save interrupt information for use in our qec_intr_establish()
  212          * function below. Apparently, the intr level for the quad
  213          * ethernet board (qe) is stored in the QEC node rather than
  214          * separately in each of the QE nodes.
  215          *
  216          * XXX - qe.c should call bus_intr_establish() with `level = 0'..
  217          * XXX - maybe we should have our own attach args for all that.
  218          */
sc->sc_intr = sa->sa_intr;
printf(": %dK memory\n", sc->sc_bufsiz / 1024);
qec_init(sc);
  225         /* search through children */
  226         for (node = firstchild(node); node; node = nextsibling(node)) {
  227                 struct sbus_attach_args sa;
sbus_setup_attach_args((struct sbus_softc *)parent,
sbt, sc->sc_dmatag, node, &sa);
  231                 (void)config_found(&sc->sc_dev, (void *)&sa, qecprint);
sbus_destroy_attach_args(&sa);
  233         }
  234 }
  236 int
qec_bus_map(t, t0, addr, size, flags, hp)
bus_space_tag_t t;
bus_space_tag_t t0;
bus_addr_t addr;
bus_size_t size;
  242         int     flags;
bus_space_handle_t *hp;
  244 {
  245         struct qec_softc *sc = t->cookie;
  246         int slot = BUS_ADDR_IOSPACE(addr);
bus_addr_t offset = BUS_ADDR_PADDR(addr);
  248         int i;
  250         for (t = t->parent; t; t = t->parent) {
  251                 if (t->sparc_bus_map != NULL)
  252                         break;
  253         }
  255         if (t == NULL) {
printf("\nqec_bus_map: invalid parent");
  257                 return (EINVAL);
  258         }
  260         if (flags & BUS_SPACE_MAP_PROMADDRESS) {
  261                 return ((*t->sparc_bus_map)
  262                     (t, t0, offset, size, flags, hp));
  263         }
  265         for (i = 0; i < sc->sc_nrange; i++) {
bus_addr_t paddr;
  267                 int iospace;
  269                 if (sc->sc_range[i].cspace != slot)
  270                         continue;
  272                 /* We've found the connection to the parent bus */
paddr = sc->sc_range[i].poffset + offset;
iospace = sc->sc_range[i].pspace;
  275                 return ((*t->sparc_bus_map)
  276                     (t, t0, BUS_ADDR(iospace, paddr), size, flags, hp));
  277         }
  279         return (EINVAL);
  280 }
  282 void *
qec_intr_establish(t, t0, pri, level, flags, handler, arg, what)
bus_space_tag_t t;
bus_space_tag_t t0;
  286         int pri;
  287         int level;
  288         int flags;
  289         int (*handler)(void *);
  290         void *arg;
  291         const char *what;
  292 {
  293         struct qec_softc *sc = t->cookie;
  295         if (pri == 0) {
  296                 /*
  297                  * qe.c calls bus_intr_establish() with `pri == 0'
  298                  * XXX - see also comment in qec_attach().
  299                  */
  300                 if (sc->sc_intr == NULL) {
printf("%s: warning: no interrupts\n",
sc->sc_dev.dv_xname);
  303                         return (NULL);
  304                 }
pri = sc->sc_intr->sbi_pri;
  306         }
  308         for (t = t->parent; t; t = t->parent) {
  309                 if (t->sparc_intr_establish != NULL)
  310                         return ((*t->sparc_intr_establish)
  311                             (t, t0, pri, level, flags, handler, arg, what));
  312         }
panic("qec_intr_extablish): no handler found");
  316         return (NULL);
  317 }
  319 void
qec_init(sc)
  321         struct qec_softc *sc;
  322 {
bus_space_tag_t t = sc->sc_bustag;
bus_space_handle_t qr = sc->sc_regs;
u_int32_t v, burst = 0, psize;
  326         int i;
  328         /* First, reset the controller */
bus_space_write_4(t, qr, QEC_QRI_CTRL, QEC_CTRL_RESET);
  330         for (i = 0; i < 1000; i++) {
DELAY(100);
v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
  333                 if ((v & QEC_CTRL_RESET) == 0)
  334                         break;
  335         }
  337         /*
  338          * Cut available buffer size into receive and transmit buffers.
  339          * XXX - should probably be done in be & qe driver...
  340          */
v = sc->sc_msize = sc->sc_bufsiz / sc->sc_nchannels;
bus_space_write_4(t, qr, QEC_QRI_MSIZE, v);
v = sc->sc_rsize = sc->sc_bufsiz / (sc->sc_nchannels * 2);
bus_space_write_4(t, qr, QEC_QRI_RSIZE, v);
bus_space_write_4(t, qr, QEC_QRI_TSIZE, v);
psize = sc->sc_nchannels == 1 ? QEC_PSIZE_2048 : 0;
bus_space_write_4(t, qr, QEC_QRI_PSIZE, psize);
  351         if (sc->sc_burst & SBUS_BURST_64)
burst = QEC_CTRL_B64;
  353         else if (sc->sc_burst & SBUS_BURST_32)
burst = QEC_CTRL_B32;
  355         else
burst = QEC_CTRL_B16;
v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
v = (v & QEC_CTRL_MODEMASK) | burst;
bus_space_write_4(t, qr, QEC_QRI_CTRL, v);
  361 }
  363 /*
  364  * Common routine to initialize the QEC packet ring buffer.
  365  * Called from be & qe drivers.
  366  */
  367 void
qec_meminit(qr, pktbufsz)
  369         struct qec_ring *qr;
  370         unsigned int pktbufsz;
  371 {
bus_addr_t txbufdma, rxbufdma;
bus_addr_t dma;
caddr_t p;
  375         unsigned int ntbuf, nrbuf, i;
p = qr->rb_membase;
dma = qr->rb_dmabase;
ntbuf = qr->rb_ntbuf;
nrbuf = qr->rb_nrbuf;
  383         /*
  384          * Allocate transmit descriptors
  385          */
qr->rb_txd = (struct qec_xd *)p;
qr->rb_txddma = dma;
p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
  391         /*
  392          * Allocate receive descriptors
  393          */
qr->rb_rxd = (struct qec_xd *)p;
qr->rb_rxddma = dma;
p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
  400         /*
  401          * Allocate transmit buffers
  402          */
qr->rb_txbuf = p;
txbufdma = dma;
p += ntbuf * pktbufsz;
dma += ntbuf * pktbufsz;
  408         /*
  409          * Allocate receive buffers
  410          */
qr->rb_rxbuf = p;
rxbufdma = dma;
p += nrbuf * pktbufsz;
dma += nrbuf * pktbufsz;
  416         /*
  417          * Initialize transmit buffer descriptors
  418          */
  419         for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
qr->rb_txd[i].xd_addr = (u_int32_t)
  421                         (txbufdma + (i % ntbuf) * pktbufsz);
qr->rb_txd[i].xd_flags = 0;
  423         }
  425         /*
  426          * Initialize receive buffer descriptors
  427          */
  428         for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
qr->rb_rxd[i].xd_addr = (u_int32_t)
  430                         (rxbufdma + (i % nrbuf) * pktbufsz);
qr->rb_rxd[i].xd_flags = (i < nrbuf)
  432                         ? QEC_XD_OWN | (pktbufsz & QEC_XD_LENGTH)
  433                         : 0;
  434         }
qr->rb_tdhead = qr->rb_tdtail = 0;
qr->rb_td_nbusy = 0;
qr->rb_rdtail = 0;
  439 }