sys/arch/evbppc/walnut/dev/pbus.c

   1 /*      $NetBSD: pbus.c,v 1.9 2005/12/11 12:17:13 christos Exp $        */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by Christopher G. Demetriou
  52  *      for the NetBSD Project.
  53  * 4. The name of the author may not be used to endorse or promote products
  54  *    derived from this software without specific prior written permission
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  57  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  58  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  59  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  60  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  61  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  62  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  63  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  64  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  65  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  66  */
  67
  68 #include <sys/cdefs.h>
  69 __KERNEL_RCSID(0, "$NetBSD: pbus.c,v 1.9 2005/12/11 12:17:13 christos Exp $");
  70
  71 #include "locators.h"
  72 #include "pckbc.h"
  73
  74 #include <sys/param.h>
  75 #include <sys/systm.h>
  76 #include <sys/device.h>
  77
  78 #include <machine/bus.h>
  79 #include <machine/walnut.h>
  80
  81 #include <evbppc/walnut/dev/pbusvar.h>
  82
  83 #include <powerpc/ibm4xx/ibm405gp.h>
  84 #include <powerpc/ibm4xx/dev/plbvar.h>
  85
  86 /*
  87  * The external devices on the Walnut 405GP evaluation board.
  88  */
  89 const struct pbus_dev {
  90         const char *name;
  91         bus_addr_t addr;
  92         int irq;
  93 } pbus_devs [] = {
  94         { "ds1743rtc",  NVRAM_BASE,     -1 },
  95         { "pckbc",      KEY_MOUSE_BASE, 25 }, /* XXX: really irq x..x+1 */
  96         { NULL }
  97 };
  98
  99 static int      pbus_match(struct device *, struct cfdata *, void *);
 100 static void     pbus_attach(struct device *, struct device *, void *);
 101 static int      pbus_print(void *, const char *);
 102
 103 CFATTACH_DECL(pbus, sizeof(struct device),
 104     pbus_match, pbus_attach, NULL, NULL);
 105
 106 static struct powerpc_bus_space pbus_tag = {
 107         _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE,
 108         0x00000000,
 109         NVRAM_BASE,
 110         NVRAM_BASE + 0x0300010  /* Cover from NVRAM_BASE -> FPGA_BASE */
 111 };
 112
 113 /*
 114  * Probe for the peripheral bus.
 115  */
 116 static int
 117 pbus_match(struct device *parent, struct cfdata *cf, void *aux)
 118 {
 119         struct pbus_attach_args *pba = aux;
 120
 121         /* match only pbus devices */
 122         if (strcmp(pba->pb_name, cf->cf_name) != 0)
 123                 return (0);
 124
 125         return (1);
 126 }
 127
 128 /*
 129  * Attach the peripheral bus.
 130  */
 131 static void
 132 pbus_attach(struct device *parent, struct device *self, void *aux)
 133 {
 134         struct plb_attach_args *paa = aux;
 135         struct pbus_attach_args pba;
 136         int i;
 137 #if NPCKBC > 0
 138         bus_space_handle_t ioh_fpga;
 139         bus_space_tag_t iot_fpga = &pbus_tag;
 140         uint8_t fpga_reg;
 141 #endif
 142
 143         printf("\n");
 144
 145         if (bus_space_init(&pbus_tag, "pbus", NULL, 0))
 146                 panic("pbus_attach: can't init tag");
 147
 148         for (i = 0; pbus_devs[i].name != NULL; i++) {
 149                 pba.pb_name = pbus_devs[i].name;
 150                 pba.pb_addr = pbus_devs[i].addr;
 151                 pba.pb_irq = pbus_devs[i].irq;
 152                 pba.pb_bt = &pbus_tag;
 153                 pba.pb_dmat = paa->plb_dmat;
 154
 155                 (void) config_found_sm_loc(self, "pbus", NULL, &pba, pbus_print,
 156                     config_stdsubmatch);
 157         }
 158
 159 #if NPCKBC > 0
 160         /* Configure FPGA */
 161         if (bus_space_map(iot_fpga, FPGA_BASE, FPGA_SIZE, 0, &ioh_fpga)) {
 162                 printf("pbus_attach: can't map FPGA\n");
 163                 /* XXX - disable keyboard probe? */
 164         } else {
 165                 /* Use separate interrupts for keyboard and mouse */
 166                 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_BRDC);
 167                 fpga_reg |= FPGA_BRDC_INT;
 168                 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_BRDC, fpga_reg);
 169
 170                 /* Set interrupts to active high */
 171                 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_POL);
 172                 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
 173                 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_POL, fpga_reg);
 174
 175                 /* Set interrupts to level triggered */
 176                 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG);
 177                 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
 178                 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG, fpga_reg);
 179
 180                 /* Enable interrupts */
 181                 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE);
 182                 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
 183                 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE, fpga_reg);
 184
 185                 bus_space_unmap(&iot_fpga, ioh_fpga, 2);
 186         }
 187 #endif
 188
 189 }
 190
 191 static int
 192 pbus_print(void *aux, const char *pnp)
 193 {
 194         struct pbus_attach_args *pba = aux;
 195
 196         if (pnp)
 197                 printf("%s at %s", pba->pb_name, pnp);
 198
 199         if (pba->pb_addr != PBUSCF_ADDR_DEFAULT)
 200                 aprint_normal(" addr 0x%08lx", pba->pb_addr);
 201         if (pba->pb_irq != PBUSCF_IRQ_DEFAULT)
 202                 aprint_normal(" irq %d", pba->pb_irq);
 203
 204         return (UNCONF);
 205 }