sys/arch/hp700/gsc/if_iee_gsc.c

   1 /* $NetBSD: if_iee_gsc.c,v 1.15 2009/05/24 06:53:35 skrll Exp $ */
   2
   3 /*
   4  * Copyright (c) 2003 Jochen Kunz.
   5  * 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. The name of Jochen Kunz may not be used to endorse or promote
  16  *    products derived from this software without specific prior
  17  *    written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL JOCHEN KUNZ
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * hp700 GSC bus MD frontend for the iee(4) Intel i82596 Ethernet driver.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: if_iee_gsc.c,v 1.15 2009/05/24 06:53:35 skrll Exp $");
  38
  39 /* autoconfig and device stuff */
  40 #include <sys/param.h>
  41 #include <sys/device.h>
  42 #include <sys/conf.h>
  43 #include <machine/iomod.h>
  44 #include <machine/autoconf.h>
  45 #include <hp700/dev/cpudevs.h>
  46 #include <hp700/gsc/gscbusvar.h>
  47 #include "locators.h"
  48 #include "ioconf.h"
  49
  50 /* bus_space / bus_dma etc. */
  51 #include <machine/bus.h>
  52 #include <machine/intr.h>
  53
  54 /* general system data and functions */
  55 #include <sys/systm.h>
  56 #include <sys/ioctl.h>
  57 #include <sys/ioccom.h>
  58 #include <sys/types.h>
  59
  60 /* tsleep / sleep / wakeup */
  61 #include <sys/proc.h>
  62 /* hz for above */
  63 #include <sys/kernel.h>
  64
  65 /* network stuff */
  66 #include <net/if.h>
  67 #include <net/if_dl.h>
  68 #include <net/if_media.h>
  69 #include <net/if_ether.h>
  70 #include <sys/socket.h>
  71 #include <sys/mbuf.h>
  72
  73 #include "bpfilter.h"
  74 #if NBPFILTER > 0
  75 #include <net/bpf.h>
  76 #endif
  77
  78 #include <dev/ic/i82596reg.h>
  79 #include <dev/ic/i82596var.h>
  80
  81 #define IEE_GSC_IO_SZ   12
  82 #define IEE_GSC_RESET   0
  83 #define IEE_GSC_PORT    4
  84 #define IEE_GSC_CHANATT 8
  85 #define IEE_ISCP_BUSY 0x1
  86
  87 /* autoconfig stuff */
  88 static int iee_gsc_match(device_t, cfdata_t, void *);
  89 static void iee_gsc_attach(device_t, device_t, void *);
  90 static int iee_gsc_detach(device_t, int);
  91
  92 struct iee_gsc_softc {
  93         struct iee_softc iee_sc;
  94         bus_space_tag_t sc_iot;
  95         bus_space_handle_t sc_ioh;
  96         void *sc_ih;
  97 };
  98
  99 CFATTACH_DECL_NEW(
 100         iee_gsc,
 101         sizeof(struct iee_gsc_softc),
 102         iee_gsc_match,
 103         iee_gsc_attach,
 104         iee_gsc_detach,
 105         NULL
 106 );
 107
 108 int iee_gsc_cmd(struct iee_softc *, uint32_t);
 109 int iee_gsc_reset(struct iee_softc *);
 110
 111 int
 112 iee_gsc_cmd(struct iee_softc *sc, uint32_t cmd)
 113 {
 114         struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *)sc;
 115         int n;
 116         uint16_t ack;
 117
 118         SC_SCB(sc)->scb_cmd = cmd;
 119         IEE_SCBSYNC(sc, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
 120         /* Issue a Channel Attention to force the chip to read the cmd. */
 121         bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_CHANATT, 0);
 122         /* Wait for the cmd to finish */
 123         for (n = 0 ; n < 100000; n++) {
 124                 DELAY(1);
 125                 IEE_SCBSYNC(sc, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
 126                 ack = SC_SCB(sc)->scb_cmd;
 127                 IEE_SCBSYNC(sc, BUS_DMASYNC_PREREAD);
 128                 if (ack == 0)
 129                         break;
 130         }
 131         if (n < 100000)
 132                 return 0;
 133         printf("%s: iee_gsc_cmd: timeout n=%d\n", device_xname(sc->sc_dev), n);
 134         return -1;
 135 }
 136
 137 int
 138 iee_gsc_reset(struct iee_softc *sc)
 139 {
 140         struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *)sc;
 141         int n;
 142         uint32_t cmd;
 143         uint16_t ack;
 144
 145         /* Make sure the busy byte is set and the cache is flushed. */
 146         SC_ISCP(sc)->iscp_busy = IEE_ISCP_BUSY;
 147         IEE_ISCPSYNC(sc, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
 148         /* Setup the PORT Command with pointer to SCP. */
 149         cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(sc->sc_scp_off);
 150         /* Write a word to IEE_GSC_RESET to initiate a Hardware reset. */
 151         bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_RESET, 0);
 152         DELAY(1000);
 153         /* Write it to the chip, it wants this in two 16 bit parts. */
 154         if (sc->sc_type == I82596_CA) {
 155                 bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT,
 156                     (cmd & 0xffff));
 157                 DELAY(1000);
 158                 bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT,
 159                     (cmd >> 16));
 160         } else {
 161                 bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT,
 162                     (cmd >> 16));
 163                 DELAY(1000);
 164                 bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT,
 165                     (cmd & 0xffff));
 166         }
 167         DELAY(1000);
 168         /* Issue a Channel Attention to read SCP */
 169         bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_CHANATT, 0);
 170         /* Wait for the chip to initialize and read SCP and ISCP. */
 171         for (n = 0 ; n < 1000; n++) {
 172                 IEE_ISCPSYNC(sc, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
 173                 ack = SC_ISCP(sc)->iscp_busy;
 174                 IEE_ISCPSYNC(sc, BUS_DMASYNC_PREREAD);
 175                 if (ack != IEE_ISCP_BUSY)
 176                         break;
 177                 DELAY(100);
 178         }
 179         if (n < 1000) {
 180                 /* ACK interrupts we may have caused */
 181                 (sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
 182                 return 0;
 183         }
 184         printf("%s: iee_gsc_reset timeout busy=0x%x\n",
 185             device_xname(sc->sc_dev), SC_ISCP(sc)->iscp_busy);
 186         return -1;
 187 }
 188
 189 static int
 190 iee_gsc_match(device_t parent, cfdata_t cf, void *aux)
 191 {
 192         struct gsc_attach_args *ga = aux;
 193
 194         if (ga->ga_type.iodc_type == HPPA_TYPE_FIO
 195             && (ga->ga_type.iodc_sv_model == HPPA_FIO_LAN
 196             || ga->ga_type.iodc_sv_model == HPPA_FIO_GLAN))
 197                 /* beat old ie(4) i82586 driver */
 198                 return 10;
 199         return 0;
 200 }
 201
 202 static void
 203 iee_gsc_attach(device_t parent, device_t self, void *aux)
 204 {
 205         struct iee_gsc_softc *sc_gsc = device_private(self);
 206         struct iee_softc *sc = &sc_gsc->iee_sc;
 207         struct gsc_attach_args *ga = aux;
 208         enum hppa_cpu_type cpu_type;
 209         int media[2];
 210
 211         sc->sc_dev = self;
 212
 213         if (ga->ga_type.iodc_sv_model == HPPA_FIO_LAN)
 214                 sc->sc_type = I82596_DX;        /* ASP(2) based */
 215         else
 216                 sc->sc_type = I82596_CA;        /* LASI based */
 217         /*
 218          * Pre PA7100LC CPUs don't support uncacheable mappings. So make
 219          * descriptors align to cache lines. Needed to avoid race conditions
 220          * caused by flushing cache lines that overlap multiple descriptors.
 221          */
 222         cpu_type = hppa_cpu_info->hci_cputype;
 223         if (cpu_type == hpcx || cpu_type == hpcxs || cpu_type == hpcxt)
 224                 sc->sc_cl_align = 32;
 225         else
 226                 sc->sc_cl_align = 1;
 227
 228         sc_gsc->sc_iot = ga->ga_iot;
 229         if (bus_space_map(sc_gsc->sc_iot, ga->ga_hpa, IEE_GSC_IO_SZ, 0,
 230             &sc_gsc->sc_ioh)) {
 231                 aprint_error(": iee_gsc_attach: can't map I/O space\n");
 232                 return;
 233         }
 234
 235         sc->sc_dmat = ga->ga_dmatag;
 236
 237         /* Setup SYSBUS byte. */
 238         if (ga->ga_type.iodc_sv_model == HPPA_FIO_LAN) {
 239                 /*
 240                  * Some earlier machines have 82596DX Rev A1 chip
 241                  * which doesn't have IEE_SYSBUS_BE for 32-bit BE pointers.
 242                  *
 243                  * XXX: How can we detect chip revision at runtime?
 244                  *      Should we check cpu_models instead?
 245                  *      715/50, 735/99: Rev A1? (per PR port-hp700/35531)
 246                  *      735/125: Rev C
 247                  */
 248                 sc->sc_sysbus = IEE_SYSBUS_INT |
 249                     IEE_SYSBUS_TRG | IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD;
 250                 sc->sc_flags = IEE_NEED_SWAP | IEE_REV_A;
 251         } else {
 252                 sc->sc_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT |
 253                     IEE_SYSBUS_TRG | IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD;
 254                 sc->sc_flags = IEE_NEED_SWAP;
 255         }
 256
 257         sc_gsc->sc_ih = hp700_intr_establish(self, IPL_NET,
 258             iee_intr, sc, ga->ga_int_reg, ga->ga_irq);
 259
 260         sc->sc_iee_reset = iee_gsc_reset;
 261         sc->sc_iee_cmd = iee_gsc_cmd;
 262         sc->sc_mediachange = NULL;
 263         sc->sc_mediastatus = NULL;
 264
 265         media[0] = IFM_ETHER | IFM_MANUAL;
 266         media[1] = IFM_ETHER | IFM_AUTO;
 267         iee_attach(sc, ga->ga_ether_address, media, 2, IFM_ETHER | IFM_AUTO);
 268 }
 269
 270 int
 271 iee_gsc_detach(device_t self, int flags)
 272 {
 273         struct iee_gsc_softc *sc_gsc = device_private(self);
 274         struct iee_softc *sc = &sc_gsc->iee_sc;
 275
 276         iee_detach(sc, flags);
 277         bus_space_unmap(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_IO_SZ);
 278         /* There is no hp700_intr_disestablish()! */
 279         return 0;
 280 }