sys/arch/mips/sibyte/dev/sbgbus.c

   1 /* $NetBSD: sbgbus.c,v 1.10 2005/12/11 12:18:12 christos Exp $ */
   2
   3 /*
   4  * Copyright 2000, 2001
   5  * Broadcom Corporation. All rights reserved.
   6  *
   7  * This software is furnished under license and may be used and copied only
   8  * in accordance with the following terms and conditions.  Subject to these
   9  * conditions, you may download, copy, install, use, modify and distribute
  10  * modified or unmodified copies of this software in source and/or binary
  11  * form. No title or ownership is transferred hereby.
  12  *
  13  * 1) Any source code used, modified or distributed must reproduce and
  14  *    retain this copyright notice and list of conditions as they appear in
  15  *    the source file.
  16  *
  17  * 2) No right is granted to use any trade name, trademark, or logo of
  18  *    Broadcom Corporation.  The "Broadcom Corporation" name may not be
  19  *    used to endorse or promote products derived from this software
  20  *    without the prior written permission of Broadcom Corporation.
  21  *
  22  * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
  23  *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
  24  *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
  25  *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
  26  *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
  27  *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30  *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  31  *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  32  *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __KERNEL_RCSID(0, "$NetBSD: sbgbus.c,v 1.10 2005/12/11 12:18:12 christos Exp $");
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/device.h>
  41
  42 #include <machine/locore.h>
  43 #include <machine/sb1250/sb1250_regs.h>
  44 #include <machine/sb1250/sb1250_genbus.h>
  45 #include <sbmips/dev/sbobio/sbobiovar.h>
  46 #include <sbmips/dev/sbgbus/sbgbusvar.h>
  47
  48 extern struct cfdriver sbgbus_cd;
  49
  50 static int      sbgbus_match(struct device *, struct cfdata *, void *);
  51 static void     sbgbus_attach(struct device *, struct device *, void *);
  52
  53 CFATTACH_DECL(sbgbus, sizeof(struct device),
  54     sbgbus_match, sbgbus_attach, NULL, NULL);
  55
  56 static int      sbgbussearch(struct device *, struct cfdata *,
  57                              const int *, void *);
  58 static int      sbgbusprint(void *, const char *);
  59
  60 static int
  61 sbgbus_match(struct device *parent, struct cfdata *match, void *aux)
  62 {
  63         struct sbobio_attach_args *sap = aux;
  64
  65         if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_GBUS)
  66                 return (0);
  67
  68         return 1;
  69 }
  70
  71 static void
  72 sbgbus_attach(struct device *parent, struct device *self, void *aux)
  73 {
  74
  75         /* Configure children using indirect configuration. */
  76         config_search_ia(sbgbussearch, self, "sbgbus", NULL);
  77 }
  78
  79 static int
  80 sbgbusprint(void *aux, const char *pnp)
  81 {
  82         struct sbgbus_attach_args *sga = aux;
  83
  84         if (sga->sga_chipsel != SBGBUS_CHIPSEL_NONE)
  85                 aprint_normal(" chipsel %u", sga->sga_chipsel);
  86         if (sga->sga_offset != 0)
  87                 aprint_normal(" offset 0x%x", sga->sga_offset);
  88         if (sga->sga_intr[0] != SBGBUS_INTR_NONE) {
  89                 aprint_normal(" intr %u", sga->sga_intr[0]);
  90                 if (sga->sga_intr[1] != SBGBUS_INTR_NONE) {
  91                         aprint_normal(",%u", sga->sga_intr[1]);
  92                 }
  93         }
  94         return (UNCONF);
  95 }
  96
  97 static int
  98 sbgbussearch(struct device *parent, struct cfdata *cf,
  99              const int *ldesc, void *aux)
 100 {
 101         struct sbgbus_attach_args sga;
 102         int tryagain;
 103
 104         do {
 105                 /* Fill in sga */
 106                 sga.sga_chipsel = cf->cf_loc[SBGBUSCF_CHIPSEL];
 107                 sga.sga_offset = cf->cf_loc[SBGBUSCF_OFFSET];
 108                 sga.sga_intr[0] = cf->cf_loc[SBGBUSCF_INTR];
 109                 sga.sga_intr[1] = cf->cf_loc[SBGBUSCF_INTR_1];
 110
 111                 /* Some quick sanity checks. */
 112                 if (sga.sga_intr[0] == SBGBUS_INTR_NONE &&
 113                     sga.sga_intr[1] != SBGBUS_INTR_NONE) {
 114                         /* XXX probably should print */
 115                         return (0);
 116                 }
 117                 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE &&
 118                     sga.sga_offset != 0) {
 119                         /* XXX probably should print */
 120                         return (0);
 121                 }
 122                 if (sga.sga_chipsel >= IO_EXT_CFG_COUNT) {
 123                         /* XXX probably should print */
 124                         return (0);
 125                 }
 126
 127                 /* XXX check for PCMCIA. */
 128
 129                 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE) {
 130                         sga.sga_startphys = 0;
 131                         sga.sga_size = 0;
 132                 } else {
 133                         uint64_t rv;
 134
 135                         rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(
 136                             A_IO_EXT_CS_BASE(sga.sga_chipsel) +
 137                             R_IO_EXT_START_ADDR));
 138                         sga.sga_startphys = (rv & M_IO_START_ADDR) << S_IO_ADDRBASE;
 139                         rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(
 140                             A_IO_EXT_CS_BASE(sga.sga_chipsel) +
 141                             R_IO_EXT_MULT_SIZE));
 142                         sga.sga_size = (rv & M_IO_MULT_SIZE) << S_IO_REGSIZE;
 143
 144                         /* Make sure that region is enabled.  */
 145                         if (sga.sga_size == 0 ||
 146                             sga.sga_startphys < A_PHYS_GENBUS ||
 147                             sga.sga_startphys >= A_PHYS_GENBUS_END)
 148                                 return (0);
 149
 150                         /* Report to child only the space they can access. */
 151                         if (sga.sga_startphys + sga.sga_size > A_PHYS_GENBUS_END)
 152                             sga.sga_size = A_PHYS_GENBUS_END - sga.sga_startphys;
 153                 }
 154
 155                 tryagain = 0;
 156                 if (config_match(parent, cf, &sga) > 0) {
 157                         config_attach(parent, cf, &sga, sbgbusprint);
 158                         tryagain = (cf->cf_fstate == FSTATE_STAR);
 159                 }
 160         } while (tryagain);
 161
 162         return (0);
 163 }