sys/arch/sgimips/ioc/oioc.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2009 Stephen M. Rumble
   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. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 /*
  28  * IOC1/IOC2 chips on IP4 and IP6/IP10 machines. This interfaces the SCSI
  29  * and Ethernet controllers, performs DMA for the former, and does address
  30  * space translation for the latter (maps the lance memory space to physical
  31  * pages).
  32  *
  33  * 'I/O Controller' is a sufficiently generic name that SGI created another
  34  * one for IP24, which basically stuffed a bunch of miscellany on an ASIC.
  35  * So, we'll call ourselves 'Old IOC' and hope that there wasn't an even older
  36  * one.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __KERNEL_RCSID(0, "$NetBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/device.h>
  44
  45 #define _SGIMIPS_BUS_DMA_PRIVATE
  46 #include <machine/cpu.h>
  47 #include <machine/locore.h>
  48 #include <machine/autoconf.h>
  49 #include <machine/bus.h>
  50 #include <machine/machtype.h>
  51 #include <machine/sysconf.h>
  52
  53 #include <sgimips/ioc/oiocreg.h>
  54 #include <sgimips/ioc/oiocvar.h>
  55
  56 #include "locators.h"
  57
  58 struct oioc_softc {
  59         struct device           sc_dev;
  60
  61         int                     sc_burst_dma;
  62
  63         bus_space_tag_t         sc_iot;
  64         bus_space_handle_t      sc_ioh;
  65 };
  66
  67 static int      oioc_match(struct device *, struct cfdata *, void *);
  68 static void     oioc_attach(struct device *, struct device *, void *);
  69 static int      oioc_print(void *, const char *);
  70
  71 CFATTACH_DECL(oioc, sizeof(struct oioc_softc),
  72     oioc_match, oioc_attach, NULL, NULL);
  73
  74 struct oioc_device {
  75         const char *od_name;
  76         int         od_irq;
  77 } oioc_devices[] = {
  78         { "oiocsc", 4 },
  79         { "le",     5 },
  80         { NULL,   0 }
  81 };
  82
  83 static int
  84 oioc_match(struct device * parent, struct cfdata * match, void *aux)
  85 {
  86
  87         switch(mach_type) {
  88         case MACH_SGI_IP4:
  89         case MACH_SGI_IP6 | MACH_SGI_IP10:
  90                 return (1);
  91         }
  92
  93         return (0);
  94 }
  95
  96 static void
  97 oioc_attach(struct device * parent, struct device * self, void *aux)
  98 {
  99         struct oioc_softc *sc = (struct oioc_softc *)self;
 100         struct mainbus_attach_args *ma = aux;
 101         uint32_t reg1, reg2;
 102         int oiocrev, i;
 103
 104         sc->sc_iot = SGIMIPS_BUS_SPACE_NORMAL;
 105         if (bus_space_map(sc->sc_iot, ma->ma_addr, 0,
 106             BUS_SPACE_MAP_LINEAR, &sc->sc_ioh))
 107                 panic("oioc_attach: could not allocate memory\n");
 108
 109         if (platform.badaddr((void *)MIPS_PHYS_TO_KSEG1(ma->ma_addr +
 110             OIOC2_CONFIG), 4))
 111                 oiocrev = 1;
 112         else
 113                 oiocrev = 2;
 114
 115         printf("\noioc0: Old SGI IOC%d\n", oiocrev);
 116
 117         if (oiocrev == 2) {
 118                 char buf[64];
 119
 120                 /* Try to enable burst mode. If we can't, we can't... */
 121                 reg1  = 12 << OIOC2_CONFIG_HIWAT_SHFT;
 122                 reg1 |= OIOC2_CONFIG_BURST_MASK;
 123                 bus_space_write_4(sc->sc_iot, sc->sc_ioh, OIOC2_CONFIG, reg1);
 124                 DELAY(1000);
 125                 reg2 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, OIOC2_CONFIG);
 126                 if ((reg2 & (reg1 | OIOC2_CONFIG_NOSYNC_MASK)) == reg1)
 127                         sc->sc_burst_dma = 1;
 128
 129                 snprintb(buf, sizeof(buf),
 130                     "\177\020"
 131                     "f\0\4HIWAT\0"
 132                     "f\4\2ID\0"
 133                     "b\6NOSYNC\0"
 134                     "b\7BURST\0"
 135                     "f\x8\7COUNT\0"
 136                     "f\x10\6SCP\0"
 137                     "f\x1c\4IOP\0\0",
 138                     (u_quad_t)reg2 & 0xffffffff);
 139                 printf("oioc0: %s\n", buf);
 140         }
 141
 142         printf("oioc0: Burst DMA %ssupported\n",
 143             (sc->sc_burst_dma) ? "" : "not ");
 144
 145         for (i = 0; oioc_devices[i].od_name != NULL; i++) {
 146                 struct oioc_attach_args oa;
 147
 148                 oa.oa_name      = oioc_devices[i].od_name;
 149                 oa.oa_irq       = oioc_devices[i].od_irq;
 150                 oa.oa_burst_dma = sc->sc_burst_dma;
 151                 oa.oa_st        = SGIMIPS_BUS_SPACE_NORMAL;
 152                 oa.oa_sh        = sc->sc_ioh;
 153                 oa.oa_dmat      = &sgimips_default_bus_dma_tag;
 154                 config_found_ia(self, "oioc", &oa, oioc_print);
 155         }
 156 }
 157
 158 static int
 159 oioc_print(void *aux, const char *pnp)
 160 {
 161         struct oioc_attach_args *oa = aux;
 162
 163         if (pnp)
 164                 printf("%s at %s", oa->oa_name, pnp);
 165
 166         return (UNCONF);
 167 }