sys/dev/netif/sr/if_sr_pci.c

   1 /*
   2  * Copyright (c) 1996 - 2001 John Hay.
   3  * Copyright (c) 1996 SDL Communications, Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the author nor the names of any co-contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/sys/dev/sr/if_sr_pci.c,v 1.15.2.1 2002/06/17 15:10:58 jhay Exp $
  31  * $DragonFly: src/sys/dev/netif/sr/if_sr_pci.c,v 1.7 2008/01/05 14:02:37 swildner Exp $
  32  */
  33
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/malloc.h>
  39 #include <sys/bus.h>
  40 #include <sys/rman.h>
  41
  42 #include <bus/pci/pcivar.h>
  43 #include <machine/md_var.h>
  44
  45 #include "../ic_layer/hd64570.h"
  46 #include "if_srregs.h"
  47
  48 #ifndef BUGGY
  49 #define BUGGY           0
  50 #endif
  51
  52 static int      sr_pci_probe(device_t);
  53 static int      sr_pci_attach(device_t);
  54
  55 static device_method_t sr_pci_methods[] = {
  56         /* Device interface */
  57         DEVMETHOD(device_probe,         sr_pci_probe),
  58         DEVMETHOD(device_attach,        sr_pci_attach),
  59         DEVMETHOD(device_detach,        sr_detach),
  60         { 0, 0 }
  61 };
  62
  63 static driver_t sr_pci_driver = {
  64         "sr",
  65         sr_pci_methods,
  66         sizeof(struct sr_hardc),
  67 };
  68
  69 DRIVER_MODULE(if_sr, pci, sr_pci_driver, sr_devclass, 0, 0);
  70
  71 static u_int    src_get8_mem(u_int base, u_int off);
  72 static u_int    src_get16_mem(u_int base, u_int off);
  73 static void     src_put8_mem(u_int base, u_int off, u_int val);
  74 static void     src_put16_mem(u_int base, u_int off, u_int val);
  75
  76 static int
  77 sr_pci_probe(device_t device)
  78 {
  79         u_int32_t       type = pci_get_devid(device);
  80
  81         switch(type) {
  82         case 0x556812aa:
  83                 device_set_desc(device, "RISCom/N2pci");
  84                 return (0);
  85                 break;
  86         case 0x55684778:
  87         case 0x55684877:
  88                 /*
  89                  * XXX This can probably be removed sometime.
  90                  */
  91                 device_set_desc(device, "RISCom/N2pci (old id)");
  92                 return (0);
  93                 break;
  94         default:
  95                 break;
  96         }
  97         return (ENXIO);
  98 }
  99
 100 static int
 101 sr_pci_attach(device_t device)
 102 {
 103         int numports;
 104         u_int fecr, *fecrp;
 105         struct sr_hardc *hc;
 106
 107         hc = (struct sr_hardc *)device_get_softc(device);
 108
 109         if (sr_allocate_plx_memory(device, 0x10, 1))
 110                 goto errexit;
 111
 112         if (sr_allocate_memory(device, 0x18, 1))
 113                 goto errexit;
 114
 115         if (sr_allocate_irq(device, 0, 1))
 116                 goto errexit;
 117
 118         hc->plx_base = rman_get_virtual(hc->res_plx_memory);
 119         hc->sca_base = (vm_offset_t)rman_get_virtual(hc->res_memory);
 120
 121         hc->cunit = device_get_unit(device);
 122
 123
 124         /*
 125          * Configure the PLX. This is magic. I'm doing it just like I'm told
 126          * to. :-)
 127          *
 128          * offset
 129          *  0x00 - Map Range    - Mem-mapped to locate anywhere
 130          *  0x04 - Re-Map       - PCI address decode enable
 131          *  0x18 - Bus Region   - 32-bit bus, ready enable
 132          *  0x1c - Master Range - include all 16 MB
 133          *  0x20 - Master RAM   - Map SCA Base at 0
 134          *  0x28 - Master Remap - direct master memory enable
 135          *  0x68 - Interrupt    - Enable interrupt (0 to disable)
 136          *
 137          * Note: This is "cargo cult" stuff.  - jrc
 138          */
 139         *((u_int *)(hc->plx_base + 0x00)) = 0xfffff000;
 140         *((u_int *)(hc->plx_base + 0x04)) = 1;
 141         *((u_int *)(hc->plx_base + 0x18)) = 0x40030043;
 142         *((u_int *)(hc->plx_base + 0x1c)) = 0xff000000;
 143         *((u_int *)(hc->plx_base + 0x20)) = 0;
 144         *((u_int *)(hc->plx_base + 0x28)) = 0xe9;
 145         *((u_int *)(hc->plx_base + 0x68)) = 0x10900;
 146
 147         /*
 148          * Get info from card.
 149          *
 150          * Only look for the second port if the first exists. Too many things
 151          * will break if we have only a second port.
 152          */
 153         fecrp = (u_int *)(hc->sca_base + SR_FECR);
 154         fecr = *fecrp;
 155         numports = 0;
 156
 157         if (((fecr & SR_FECR_ID0) >> SR_FE_ID0_SHFT) != SR_FE_ID_NONE) {
 158                 numports++;
 159                 if (((fecr & SR_FECR_ID1) >> SR_FE_ID1_SHFT) != SR_FE_ID_NONE)
 160                         numports++;
 161         }
 162         if (numports == 0)
 163                 goto errexit;
 164
 165         hc->numports = numports;
 166         hc->cardtype = SR_CRD_N2PCI;
 167
 168         hc->src_put8 = src_put8_mem;
 169         hc->src_put16 = src_put16_mem;
 170         hc->src_get8 = src_get8_mem;
 171         hc->src_get16 = src_get16_mem;
 172
 173         /*
 174          * Malloc area for tx and rx buffers. For now allocate SRC_WIN_SIZ
 175          * (16k) for each buffer.
 176          *
 177          * Allocate the block below 16M because the N2pci card can only access
 178          * 16M memory at a time.
 179          *
 180          * (We could actually allocate a contiguous block above the 16MB limit,
 181          * but this would complicate card programming more than we want to
 182          * right now -jrc)
 183          */
 184         hc->memsize = 2 * hc->numports * SRC_WIN_SIZ;
 185         hc->mem_start = contigmalloc(hc->memsize,
 186                                      M_DEVBUF,
 187                                      M_NOWAIT | M_ZERO,
 188                                      0ul,
 189                                      0xfffffful,
 190                                      0x10000,
 191                                      0x1000000);
 192
 193         if (hc->mem_start == NULL) {
 194                 kprintf("src%d: pci: failed to allocate buffer space.\n",
 195                     hc->cunit);
 196                 goto errexit;
 197         }
 198         hc->winmsk = 0xffffffff;
 199         hc->mem_end = (caddr_t)((u_int)hc->mem_start + hc->memsize);
 200         hc->mem_pstart = kvtop(hc->mem_start);
 201
 202         *fecrp = SR_FECR_DTR0
 203             | SR_FECR_DTR1
 204             | SR_FECR_TE0
 205             | SR_FECR_TE1;
 206
 207         if (sr_attach(device))
 208                 goto errexit;
 209
 210         return (0);
 211 errexit:
 212         sr_deallocate_resources(device);
 213         return (ENXIO);
 214 }
 215
 216 /*
 217  * I/O for PCI N2 card(s)
 218  */
 219 #define SRC_PCI_SCA_REG(y)      ((y & 2) ? ((y & 0xfd) + 0x100) : y)
 220
 221 static u_int
 222 src_get8_mem(u_int base, u_int off)
 223 {
 224         return *((u_char *)(base + SRC_PCI_SCA_REG(off)));
 225 }
 226
 227 static u_int
 228 src_get16_mem(u_int base, u_int off)
 229 {
 230         return *((u_short *)(base + SRC_PCI_SCA_REG(off)));
 231 }
 232
 233 static void
 234 src_put8_mem(u_int base, u_int off, u_int val)
 235 {
 236         *((u_char *)(base + SRC_PCI_SCA_REG(off))) = (u_char)val;
 237 }
 238
 239 static void
 240 src_put16_mem(u_int base, u_int off, u_int val)
 241 {
 242         *((u_short *)(base + SRC_PCI_SCA_REG(off))) = (u_short)val;
 243 }