sys/arch/ews4800mips/sbd/if_iee_sbdio.c

   1 /*      $NetBSD: if_iee_sbdio.c,v 1.9 2009/05/10 04:26:19 tsutsui 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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: if_iee_sbdio.c,v 1.9 2009/05/10 04:26:19 tsutsui Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38
  39 #include <net/if.h>
  40 #include <net/if_dl.h>
  41 #include <net/if_media.h>
  42 #include <net/if_ether.h>
  43 #include <sys/socket.h>
  44 #include <sys/mbuf.h>
  45
  46 #include <mips/cache.h>
  47 #include <machine/bus.h>
  48 #include <machine/intr.h>
  49 #include <machine/sbdvar.h>     /* for ether_addr() */
  50 #include <machine/sbdiovar.h>
  51
  52 #include <dev/ic/i82596reg.h>
  53 #include <dev/ic/i82596var.h>
  54
  55 int iee_sbdio_match(device_t, cfdata_t, void *);
  56 void iee_sbdio_attach(device_t, device_t, void *);
  57 int iee_sbdio_cmd(struct iee_softc *, uint32_t);
  58 int iee_sbdio_reset(struct iee_softc *);
  59
  60 static void iee_sbdio_channel_attention(void *);
  61 static void iee_sbdio_chip_reset(void *);
  62 static void iee_sbdio_set_scp(void *, uint32_t);
  63
  64 struct iee_sbdio_softc {
  65         struct iee_softc sc_iee;
  66         volatile uint32_t *sc_port;     /* CPU <-> i82596 interface */
  67 };
  68
  69 CFATTACH_DECL_NEW(iee_sbdio, sizeof(struct iee_sbdio_softc),
  70     iee_sbdio_match, iee_sbdio_attach, NULL, NULL);
  71
  72 int
  73 iee_sbdio_match(device_t parent, cfdata_t cf, void *aux)
  74 {
  75         struct sbdio_attach_args *sa = aux;
  76
  77         return strcmp(sa->sa_name, "iee") ? 0 : 1;
  78 }
  79
  80 void
  81 iee_sbdio_attach(device_t parent, device_t self, void *aux)
  82 {
  83         struct iee_sbdio_softc *sc_ssc = device_private(self);
  84         struct iee_softc *sc = &sc_ssc->sc_iee;
  85         struct sbdio_attach_args *sa = aux;
  86         uint8_t eaddr[ETHER_ADDR_LEN];
  87         int media[2];
  88
  89         sc->sc_dev = self;
  90         sc_ssc->sc_port =
  91             (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(sa->sa_addr1);
  92         sc->sc_type = I82596_CA;
  93         sc->sc_flags = IEE_NEED_SWAP;
  94
  95         /* bus_dma round the dma size to page size. */
  96         sc->sc_cl_align = 1;
  97
  98         sc->sc_dmat = sa->sa_dmat;
  99
 100         /* Setup SYSBUS byte. TR2 specific? -uch */
 101         sc->sc_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT |
 102             IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD;
 103
 104         sc->sc_iee_reset = iee_sbdio_reset;
 105         sc->sc_iee_cmd = iee_sbdio_cmd;
 106         sc->sc_mediachange = NULL;
 107         sc->sc_mediastatus = NULL;
 108
 109         media[0] = IFM_ETHER | IFM_MANUAL;
 110         media[1] = IFM_ETHER | IFM_10_5;
 111
 112         intr_establish(sa->sa_irq, iee_intr, sc);
 113         (*platform.ether_addr)(eaddr);
 114         iee_attach(sc, eaddr, media, 2, IFM_ETHER | IFM_10_5);
 115 }
 116
 117 int
 118 iee_sbdio_cmd(struct iee_softc *sc, uint32_t cmd)
 119 {
 120         int retry = 8;
 121         int n;
 122         uint32_t ack;
 123
 124         SC_SCB(sc)->scb_cmd = cmd;
 125         IEE_SCBSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 126
 127         iee_sbdio_channel_attention(sc);
 128
 129         /* Wait for the cmd to finish */
 130         for (n = 0 ; n < retry; n++) {
 131                 IEE_SCBSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
 132                 ack = SC_SCB(sc)->scb_cmd;
 133                 IEE_SCBSYNC(sc, BUS_DMASYNC_PREREAD);
 134                 if (ack == 0)
 135                         break;
 136                 delay(1);
 137         }
 138         if (n < retry)
 139                 return 0;
 140
 141         printf("%s: command timeout. retry=%d\n",
 142             device_xname(sc->sc_dev), retry);
 143
 144         return -1;
 145 }
 146
 147 int
 148 iee_sbdio_reset(struct iee_softc *sc)
 149 {
 150 #define IEE_ISCP_BUSY 0x1
 151         int n, retry = 8;
 152         uint32_t cmd, ack;
 153
 154         /* Make sure the busy byte is set and the cache is flushed. */
 155         SC_ISCP(sc)->iscp_busy = IEE_ISCP_BUSY;
 156         IEE_ISCPSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 157
 158         /* Setup the PORT Command with pointer to SCP. */
 159         cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(sc->sc_scp_off);
 160
 161         /* Initiate a Hardware reset. */
 162         printf("%s: reseting chip... ", device_xname(sc->sc_dev));
 163         iee_sbdio_chip_reset(sc);
 164
 165         /* Set SCP address to CU */
 166         iee_sbdio_set_scp(sc, cmd);
 167
 168         /* Wait for the chip to initialize and read SCP and ISCP. */
 169         for (n = 0 ; n < retry; n++) {
 170                 IEE_ISCPSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
 171                 ack = SC_ISCP(sc)->iscp_busy;
 172                 IEE_ISCPSYNC(sc, BUS_DMASYNC_PREREAD);
 173                 if (ack != IEE_ISCP_BUSY) {
 174                         break;
 175                 }
 176                 delay(100);
 177         }
 178
 179         if (n < retry) {
 180                 /* ACK interrupts we may have caused */
 181                 sc->sc_iee_cmd(sc, IEE_SCB_ACK);
 182                 printf("done.\n");
 183
 184                 return 0;
 185         }
 186         printf("time out.\n");
 187
 188         return -1;
 189 }
 190
 191 static void
 192 iee_sbdio_channel_attention(void *cookie)
 193 {
 194         struct iee_sbdio_softc *sc = cookie;
 195         uint32_t dummy;
 196
 197         /* Issue a Channel Attention */
 198         dummy = *sc->sc_port;
 199         dummy = *sc->sc_port;
 200 }
 201
 202 static void
 203 iee_sbdio_chip_reset(void *cookie)
 204 {
 205         struct iee_sbdio_softc *sc = cookie;
 206
 207         *sc->sc_port = 0;
 208         *sc->sc_port = 0;
 209         delay(10);
 210 }
 211
 212 static void
 213 iee_sbdio_set_scp(void *cookie, uint32_t cmd)
 214 {
 215         struct iee_sbdio_softc *sc = cookie;
 216         cmd = (cmd << 16) | (cmd >> 16);
 217
 218         *sc->sc_port = cmd;
 219         *sc->sc_port = cmd;
 220
 221         /* Issue a Channel Attention to read SCP */
 222         iee_sbdio_channel_attention(cookie);
 223 }