if_sr_pci.c

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    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: releng/5.0/sys/dev/sr/if_sr_pci.c 71826 2001-01-30 10:02:10Z jhay $
   31  */
   32 
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/malloc.h>
   38 #include <sys/bus.h>
   39 #include <machine/bus.h>
   40 #include <machine/resource.h>
   41 #include <machine/bus_pio.h>
   42 #include <machine/bus_memio.h>
   43 #include <sys/rman.h>
   44 
   45 #include <pci/pcivar.h>
   46 #include <machine/md_var.h>
   47 
   48 #include <dev/ic/hd64570.h>
   49 #include <dev/sr/if_srregs.h>
   50 
   51 #ifndef BUGGY
   52 #define BUGGY           0
   53 #endif
   54 
   55 static int      sr_pci_probe(device_t);
   56 static int      sr_pci_attach(device_t);
   57 
   58 static device_method_t sr_pci_methods[] = {
   59         /* Device interface */
   60         DEVMETHOD(device_probe,         sr_pci_probe),
   61         DEVMETHOD(device_attach,        sr_pci_attach),
   62         DEVMETHOD(device_detach,        sr_detach),
   63         { 0, 0 }
   64 };
   65 
   66 static driver_t sr_pci_driver = {
   67         "sr",
   68         sr_pci_methods,
   69         sizeof(struct sr_hardc),
   70 };
   71 
   72 DRIVER_MODULE(if_sr, pci, sr_pci_driver, sr_devclass, 0, 0);
   73 
   74 static u_int    src_get8_mem(u_int base, u_int off);
   75 static u_int    src_get16_mem(u_int base, u_int off);
   76 static void     src_put8_mem(u_int base, u_int off, u_int val);
   77 static void     src_put16_mem(u_int base, u_int off, u_int val);
   78 
   79 static int
   80 sr_pci_probe(device_t device)
   81 {
   82         u_int32_t       type = pci_get_devid(device);
   83 
   84         switch(type) {
   85         case 0x556812aa:
   86                 device_set_desc(device, "RISCom/N2pci");
   87                 return (0);
   88                 break;
   89         case 0x55684778:
   90         case 0x55684877:
   91                 /*
   92                  * XXX This can probably be removed sometime.
   93                  */
   94                 device_set_desc(device, "RISCom/N2pci (old id)");
   95                 return (0);
   96                 break;
   97         default:
   98                 break;
   99         }
  100         return (ENXIO);
  101 }
  102 
  103 static int
  104 sr_pci_attach(device_t device)
  105 {
  106         int numports;
  107         u_int fecr, *fecrp;
  108         struct sr_hardc *hc;
  109 
  110         hc = (struct sr_hardc *)device_get_softc(device);
  111         bzero(hc, sizeof(struct sr_hardc));
  112 
  113         if (sr_allocate_plx_memory(device, 0x10, 1))
  114                 goto errexit;
  115 
  116         if (sr_allocate_memory(device, 0x18, 1))
  117                 goto errexit;
  118 
  119         if (sr_allocate_irq(device, 0, 1))
  120                 goto errexit;
  121 
  122         hc->plx_base = rman_get_virtual(hc->res_plx_memory);
  123         hc->sca_base = (vm_offset_t)rman_get_virtual(hc->res_memory);
  124 
  125         hc->cunit = device_get_unit(device);
  126 
  127 
  128         /*
  129          * Configure the PLX. This is magic. I'm doing it just like I'm told
  130          * to. :-)
  131          * 
  132          * offset
  133          *  0x00 - Map Range    - Mem-mapped to locate anywhere
  134          *  0x04 - Re-Map       - PCI address decode enable
  135          *  0x18 - Bus Region   - 32-bit bus, ready enable
  136          *  0x1c - Master Range - include all 16 MB
  137          *  0x20 - Master RAM   - Map SCA Base at 0
  138          *  0x28 - Master Remap - direct master memory enable
  139          *  0x68 - Interrupt    - Enable interrupt (0 to disable)
  140          * 
  141          * Note: This is "cargo cult" stuff.  - jrc
  142          */
  143         *((u_int *)(hc->plx_base + 0x00)) = 0xfffff000;
  144         *((u_int *)(hc->plx_base + 0x04)) = 1;
  145         *((u_int *)(hc->plx_base + 0x18)) = 0x40030043;
  146         *((u_int *)(hc->plx_base + 0x1c)) = 0xff000000;
  147         *((u_int *)(hc->plx_base + 0x20)) = 0;
  148         *((u_int *)(hc->plx_base + 0x28)) = 0xe9;
  149         *((u_int *)(hc->plx_base + 0x68)) = 0x10900;
  150 
  151         /*
  152          * Get info from card.
  153          *
  154          * Only look for the second port if the first exists. Too many things
  155          * will break if we have only a second port.
  156          */
  157         fecrp = (u_int *)(hc->sca_base + SR_FECR);
  158         fecr = *fecrp;
  159         numports = 0;
  160 
  161         if (((fecr & SR_FECR_ID0) >> SR_FE_ID0_SHFT) != SR_FE_ID_NONE) {
  162                 numports++;
  163                 if (((fecr & SR_FECR_ID1) >> SR_FE_ID1_SHFT) != SR_FE_ID_NONE)
  164                         numports++;
  165         }
  166         if (numports == 0)
  167                 goto errexit;
  168 
  169         hc->numports = numports;
  170         hc->cardtype = SR_CRD_N2PCI;
  171 
  172         hc->src_put8 = src_put8_mem;
  173         hc->src_put16 = src_put16_mem;
  174         hc->src_get8 = src_get8_mem;
  175         hc->src_get16 = src_get16_mem;
  176 
  177         /*
  178          * Malloc area for tx and rx buffers. For now allocate SRC_WIN_SIZ
  179          * (16k) for each buffer.
  180          *
  181          * Allocate the block below 16M because the N2pci card can only access
  182          * 16M memory at a time.
  183          *
  184          * (We could actually allocate a contiguous block above the 16MB limit,
  185          * but this would complicate card programming more than we want to
  186          * right now -jrc)
  187          */
  188         hc->memsize = 2 * hc->numports * SRC_WIN_SIZ;
  189         hc->mem_start = contigmalloc(hc->memsize,
  190                                      M_DEVBUF,
  191                                      M_NOWAIT,
  192                                      0ul,
  193                                      0xfffffful,
  194                                      0x10000,
  195                                      0x1000000);
  196 
  197         if (hc->mem_start == NULL) {
  198                 printf("src%d: pci: failed to allocate buffer space.\n",
  199                     hc->cunit);
  200                 goto errexit;
  201         }
  202         hc->winmsk = 0xffffffff;
  203         hc->mem_end = (caddr_t)((u_int)hc->mem_start + hc->memsize);
  204         hc->mem_pstart = kvtop(hc->mem_start);
  205         bzero(hc->mem_start, hc->memsize);
  206 
  207         *fecrp = SR_FECR_DTR0
  208             | SR_FECR_DTR1
  209             | SR_FECR_TE0
  210             | SR_FECR_TE1;
  211 
  212         if (sr_attach(device))
  213                 goto errexit;
  214 
  215         return (0);
  216 errexit:
  217         sr_deallocate_resources(device);
  218         return (ENXIO);
  219 }
  220 
  221 /*
  222  * I/O for PCI N2 card(s)
  223  */
  224 #define SRC_PCI_SCA_REG(y)      ((y & 2) ? ((y & 0xfd) + 0x100) : y)
  225 
  226 static u_int
  227 src_get8_mem(u_int base, u_int off)
  228 {
  229         return *((u_char *)(base + SRC_PCI_SCA_REG(off)));
  230 }
  231 
  232 static u_int
  233 src_get16_mem(u_int base, u_int off)
  234 {
  235         return *((u_short *)(base + SRC_PCI_SCA_REG(off)));
  236 }
  237 
  238 static void
  239 src_put8_mem(u_int base, u_int off, u_int val)
  240 {
  241         *((u_char *)(base + SRC_PCI_SCA_REG(off))) = (u_char)val;
  242 }
  243 
  244 static void
  245 src_put16_mem(u_int base, u_int off, u_int val)
  246 {
  247         *((u_short *)(base + SRC_PCI_SCA_REG(off))) = (u_short)val;
  248 }

Cache object: 39c666f45fd504c92bbb43fd6420b33e

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FreeBSD/Linux Kernel Cross Reference sys/dev/sr/if_sr_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sr/if_sr_pci.c