sys/arch/evbppc/pmppc/pci/pci_machdep.c

   1 /*      $NetBSD: pci_machdep.c,v 1.1.2.2 2007/05/09 09:02:51 garbled Exp $      */
   2
   3 /*
   4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
   5  * Copyright (c) 1994 Charles M. Hannum.  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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Charles M. Hannum.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Machine-specific functions for PCI autoconfiguration.
  35  *
  36  * On PCs, there are two methods of generating PCI configuration cycles.
  37  * We try to detect the appropriate mechanism for this machine and set
  38  * up a few function pointers to access the correct method directly.
  39  *
  40  * The configuration method can be hard-coded in the config file by
  41  * using `options PCI_CONF_MODE=N', where `N' is the configuration mode
  42  * as defined section 3.6.4.1, `Generating Configuration Cycles'.
  43  */
  44
  45 #include <sys/cdefs.h>
  46 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.1.2.2 2007/05/09 09:02:51 garbled Exp $");
  47
  48 #include <sys/types.h>
  49 #include <sys/param.h>
  50 #include <sys/device.h>
  51 #include <sys/errno.h>
  52 #include <sys/extent.h>
  53 #include <sys/malloc.h>
  54 #include <sys/queue.h>
  55 #include <sys/systm.h>
  56 #include <sys/time.h>
  57 #include <machine/pcb.h>
  58
  59 #include <uvm/uvm.h>
  60
  61 #define _POWERPC_BUS_DMA_PRIVATE
  62 #include <machine/bus.h>
  63 #include <machine/pio.h>
  64 #include <machine/intr.h>
  65
  66 #include <dev/ic/cpc700reg.h>
  67 #include <machine/pmppc.h>
  68
  69 #include <dev/pci/pcivar.h>
  70 #include <dev/pci/pcireg.h>
  71 #include <dev/pci/pcidevs.h>
  72 #include <dev/pci/pciconf.h>
  73
  74 #include <machine/pmppc_pci_machdep.h>
  75
  76 /*
  77  * Address conversion as seen from a PCI master.
  78  * XXX Shouldn't use 0x80000000, the actual value
  79  * should come from the BAR.
  80  */
  81 #define PHYS_TO_PCI_MEM(x)      ((x) + 0x80000000)
  82 #define PCI_MEM_TO_PHYS(x)      ((x) - 0x80000000)
  83
  84 static bus_addr_t phys_to_pci(bus_dma_tag_t, bus_addr_t);
  85 static bus_addr_t pci_to_phys(bus_dma_tag_t, bus_addr_t);
  86
  87 extern struct powerpc_bus_dma_tag pci_bus_dma_tag;
  88
  89 void
  90 pmppc_pci_get_chipset_tag(pci_chipset_tag_t pc)
  91 {
  92         pc->pc_conf_v = (void *)pc;
  93
  94         pc->pc_attach_hook = genppc_pci_indirect_attach_hook;
  95         pc->pc_bus_maxdevs = genppc_pci_bus_maxdevs;
  96         pc->pc_make_tag = genppc_pci_indirect_make_tag;
  97         pc->pc_conf_read = genppc_pci_indirect_conf_read;
  98         pc->pc_conf_write = genppc_pci_indirect_conf_write;
  99
 100         pc->pc_intr_v = (void *)pc;
 101
 102         pc->pc_intr_map = pmppc_pci_intr_map;
 103         pc->pc_intr_string = genppc_pci_intr_string;
 104         pc->pc_intr_evcnt = genppc_pci_intr_evcnt;
 105         pc->pc_intr_establish = genppc_pci_intr_establish;
 106         pc->pc_intr_disestablish = genppc_pci_intr_disestablish;
 107
 108         pc->pc_conf_interrupt = pmppc_pci_conf_interrupt;
 109         pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag;
 110         pc->pc_conf_hook = genppc_pci_conf_hook;
 111
 112         pc->pc_addr = mapiodev(CPC_PCICFGADR, 4);
 113         pc->pc_data = mapiodev(CPC_PCICFGDATA, 4);
 114         pc->pc_bus = 0;
 115         pc->pc_node = 0;
 116         pc->pc_memt = 0;
 117         pc->pc_iot = 0;
 118
 119         /* the following two lines are required because unlike other ports,
 120          * we cannot just add PHYS_TO_BUS_MEM/BUS_MEM_TO_PHYS defines to
 121          * bus.h, because it would impact other evbppc ports.
 122          */
 123         pci_bus_dma_tag._dma_phys_to_bus_mem = phys_to_pci;
 124         pci_bus_dma_tag._dma_bus_mem_to_phys = pci_to_phys;
 125 }
 126
 127
 128 static bus_addr_t
 129 phys_to_pci(bus_dma_tag_t t, bus_addr_t a)
 130 {
 131         return PHYS_TO_PCI_MEM(a);
 132 }
 133
 134 static bus_addr_t pci_to_phys(bus_dma_tag_t t, bus_addr_t a)
 135 {
 136         return PCI_MEM_TO_PHYS(a);
 137 }
 138
 139 int
 140 pmppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
 141 {
 142         int     pin = pa->pa_intrpin;
 143         int     line = pa->pa_intrline;
 144
 145         if (pin == 0) {
 146                 /* No IRQ used. */
 147                 goto bad;
 148         }
 149
 150         if (pin > 4) {
 151                 printf("pci_intr_map: bad interrupt pin %d\n", pin);
 152                 goto bad;
 153         }
 154
 155         if (line == 255) {
 156                 printf("pci_intr_map: no mapping for pin %c\n", '@' + pin);
 157                 goto bad;
 158         }
 159         /*printf("pci_intr_map pin=%d line=%d\n", pin, line);*/
 160
 161         switch (line & 3) {     /* XXX what should this be? */
 162         case 0: *ihp = PMPPC_I_BPMC_INTA; break;
 163         case 1: *ihp = PMPPC_I_BPMC_INTB; break;
 164         case 2: *ihp = PMPPC_I_BPMC_INTC; break;
 165         case 3: *ihp = PMPPC_I_BPMC_INTD; break;
 166         }
 167         return 0;
 168
 169 bad:
 170         *ihp = -1;
 171         return 1;
 172 }
 173
 174 void
 175 pmppc_pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin,
 176     int swiz, int *iline)
 177 {
 178         int line;
 179
 180         line = (swiz + dev) & 3;
 181         /* XXX UGLY UGLY, figure out the real interrupt mapping */
 182         if (bus==3&&dev==2&&pin==1&&swiz==3) line=2;
 183 /*
 184         printf("pci_conf_interrupt: bus=%d dev=%d pin=%d swiz=%d => line=%d\n",
 185                 bus, dev, pin, swiz, line);
 186 */
 187         *iline = line;
 188 }