adw_pci.c

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    1 /*
    2  * Device probe and attach routines for the following
    3  * Advanced Systems Inc. SCSI controllers:
    4  *
    5  *      ABP940UW - Bus-Master PCI Ultra-Wide (240 CDB)
    6  *
    7  * Copyright (c) 1998 Justin Gibbs.
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions, and the following disclaimer,
   15  *    without modification, immediately at the beginning of the file.
   16  * 2. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 
   38 #include <machine/bus_pio.h>
   39 #include <machine/bus.h>
   40 
   41 #include <pci/pcireg.h>
   42 #include <pci/pcivar.h>
   43 
   44 #include <cam/cam.h>
   45 #include <cam/scsi/scsi_all.h>
   46 
   47 #include <dev/advansys/adwvar.h>
   48 #include <dev/advansys/adwlib.h>
   49 #include <dev/advansys/adwmcode.h>
   50 
   51 #define PCI_BASEADR0    PCI_MAP_REG_START       /* I/O Address */
   52 #define PCI_BASEADR1    PCI_MAP_REG_START + 4   /* Mem I/O Address */
   53 
   54 #define PCI_DEVICE_ID_ADVANSYS_3550     0x230010CD
   55 
   56 #define ADW_PCI_MAX_DMA_ADDR    (0xFFFFFFFFUL)
   57 #define ADW_PCI_MAX_DMA_COUNT   (0xFFFFFFFFUL)
   58 
   59 static const char* adwpciprobe(pcici_t tag, pcidi_t type);
   60 static void adwpciattach(pcici_t config_id, int unit);
   61 
   62 static struct  pci_device adw_pci_driver = {
   63         "adw",
   64         adwpciprobe,
   65         adwpciattach,
   66         &adw_unit,
   67         NULL
   68 };
   69 
   70 COMPAT_PCI_DRIVER (adw_pci, adw_pci_driver);
   71 
   72 static const char*
   73 adwpciprobe(pcici_t tag, pcidi_t type)
   74 {
   75         switch (type) {
   76         case PCI_DEVICE_ID_ADVANSYS_3550:
   77                 return ("AdvanSys ASC3550 SCSI controller");
   78         default:
   79                 break;
   80         }
   81         return (NULL);
   82 }
   83 
   84 static void
   85 adwpciattach(pcici_t config_id, int unit)
   86 {
   87         u_int32_t          id;
   88         u_int32_t          command;
   89         vm_offset_t        vaddr;
   90 #ifdef ADW_ALLOW_MEMIO
   91         vm_offset_t        paddr;
   92 #endif
   93         u_int16_t          io_port;
   94         bus_space_tag_t    tag;
   95         bus_space_handle_t bsh;
   96         struct adw_softc  *adw;
   97         int                error;
   98  
   99         /*
  100          * Determine the chip version.
  101          */
  102         id = pci_cfgread(config_id, PCI_ID_REG, /*bytes*/4);
  103         command = pci_cfgread(config_id, PCIR_COMMAND, /*bytes*/1);
  104 
  105         /*
  106          * These cards do not allow memory mapped accesses, so we must
  107          * ensure that I/O accesses are available or we won't be able
  108          * to talk to them.
  109          */
  110         vaddr = 0;
  111 #ifdef ADW_ALLOW_MEMIO
  112         if ((command & PCI_COMMAND_MEM_ENABLE) == 0
  113          || (pci_map_mem(config_id, PCI_BASEADR1, &vaddr, &paddr)) == 0)
  114 #endif
  115                 if ((command & PCI_COMMAND_IO_ENABLE) == 0
  116                  || (pci_map_port(config_id, PCI_BASEADR0, &io_port)) == 0)
  117                         return;
  118 
  119         /* XXX Should be passed in by parent bus */
  120         /* XXX Why isn't the 0x10 offset incorporated into the reg defs? */
  121         if (vaddr != 0) {
  122                 tag = I386_BUS_SPACE_MEM;
  123                 bsh = vaddr;
  124         } else {
  125                 tag = I386_BUS_SPACE_IO;
  126                 bsh = io_port;
  127         }
  128 
  129 
  130         if (adw_find_signature(tag, bsh) == 0)
  131                 return;
  132 
  133         adw = adw_alloc(unit, tag, bsh);
  134         if (adw == NULL)
  135                 return;
  136 
  137         /* Allocate a dmatag for our transfer DMA maps */
  138         /* XXX Should be a child of the PCI bus dma tag */
  139         error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
  140                                    /*boundary*/0,
  141                                    /*lowaddr*/ADW_PCI_MAX_DMA_ADDR,
  142                                    /*highaddr*/BUS_SPACE_MAXADDR,
  143                                    /*filter*/NULL, /*filterarg*/NULL,
  144                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
  145                                    /*nsegments*/BUS_SPACE_UNRESTRICTED,
  146                                    /*maxsegsz*/ADW_PCI_MAX_DMA_COUNT,
  147                                    /*flags*/0,
  148                                    &adw->parent_dmat);
  149 
  150         adw->init_level++;
  151  
  152         if (error != 0) {
  153                 printf("%s: Could not allocate DMA tag - error %d\n",
  154                        adw_name(adw), error);
  155                 adw_free(adw);
  156                 return;
  157         }
  158 
  159         adw->init_level++;
  160 
  161         if (adw_init(adw) != 0) {
  162                 adw_free(adw);
  163                 return;
  164         }
  165 
  166         /*
  167          * If the PCI Configuration Command Register "Parity Error Response
  168          * Control" Bit was clear (0), then set the microcode variable
  169          * 'control_flag' CONTROL_FLAG_IGNORE_PERR flag to tell the microcode
  170          * to ignore DMA parity errors.
  171          */
  172         if ((command & PCIM_CMD_PERRESPEN) == 0)
  173                 adw_lram_write_16(adw, ADW_MC_CONTROL_FLAG,
  174                                   adw_lram_read_16(adw, ADW_MC_CONTROL_FLAG)
  175                                   | ADW_MC_CONTROL_IGN_PERR);
  176 
  177         if ((pci_map_int(config_id, adw_intr, (void *)adw, &cam_imask)) == 0) {
  178                 adw_free(adw);
  179                 return;
  180         }
  181         
  182         adw_attach(adw);
  183 }

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FreeBSD/Linux Kernel Cross Reference sys/pci/adw_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/pci/adw_pci.c