drivers/scsi/aic7xxx/aic7770_osm.c

   1 /*
   2  * Linux driver attachment glue for aic7770 based controllers.
   3  *
   4  * Copyright (c) 2000-2003 Adaptec Inc.
   5  * 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  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7770_osm.c#14 $
  40  */
  41
  42 #include "aic7xxx_osm.h"
  43
  44 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
  45 #include <linux/device.h>
  46 #include <linux/eisa.h>
  47
  48 #define EISA_MFCTR_CHAR0(ID) (char)(((ID>>26) & 0x1F) | '@')  /* Bits 26-30 */
  49 #define EISA_MFCTR_CHAR1(ID) (char)(((ID>>21) & 0x1F) | '@')  /* Bits 21-25 */
  50 #define EISA_MFCTR_CHAR2(ID) (char)(((ID>>16) & 0x1F) | '@')  /* Bits 16-20 */
  51 #define EISA_PRODUCT_ID(ID)  (short)((ID>>4)  & 0xFFF)        /* Bits  4-15 */
  52 #define EISA_REVISION_ID(ID) (uint8_t)(ID & 0x0F)             /* Bits  0-3  */
  53
  54 static int aic7770_eisa_dev_probe(struct device *dev);
  55 static int aic7770_eisa_dev_remove(struct device *dev);
  56 static struct eisa_driver aic7770_driver = {
  57         .driver = {
  58                 .name   = "aic7xxx",
  59                 .probe  = aic7770_eisa_dev_probe,
  60                 .remove = aic7770_eisa_dev_remove,
  61         }
  62 };
  63
  64 typedef  struct device *aic7770_dev_t;
  65 #else
  66 #define MINSLOT                 1
  67 #define NUMSLOTS                16
  68 #define IDOFFSET                0x80
  69
  70 typedef void *aic7770_dev_t;
  71 #endif
  72
  73 static int aic7770_linux_config(struct aic7770_identity *entry,
  74                                 aic7770_dev_t dev, u_int eisaBase);
  75
  76 int
  77 ahc_linux_eisa_init(void)
  78 {
  79 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
  80         struct eisa_device_id *eid;
  81         struct aic7770_identity *id;
  82         int i;
  83
  84         if (aic7xxx_probe_eisa_vl == 0)
  85                 return -ENODEV;
  86
  87         /*
  88          * Linux requires the EISA IDs to be specified in
  89          * the EISA ID string format.  Perform the conversion
  90          * and setup a table with a NUL terminal entry.
  91          */
  92         aic7770_driver.id_table = malloc(sizeof(struct eisa_device_id) *
  93                                          (ahc_num_aic7770_devs + 1),
  94                                          M_DEVBUF, M_NOWAIT);
  95         if (aic7770_driver.id_table == NULL)
  96                 return -ENOMEM;
  97
  98         for (eid = (struct eisa_device_id *)aic7770_driver.id_table,
  99              id = aic7770_ident_table, i = 0;
 100              i < ahc_num_aic7770_devs; eid++, id++, i++) {
 101
 102                 sprintf(eid->sig, "%c%c%c%03X%01X",
 103                         EISA_MFCTR_CHAR0(id->full_id),
 104                         EISA_MFCTR_CHAR1(id->full_id),
 105                         EISA_MFCTR_CHAR2(id->full_id),
 106                         EISA_PRODUCT_ID(id->full_id),
 107                         EISA_REVISION_ID(id->full_id));
 108                 eid->driver_data = i;
 109         }
 110         eid->sig[0] = 0;
 111
 112         return eisa_driver_register(&aic7770_driver);
 113 #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) */
 114         struct aic7770_identity *entry;
 115         u_int  slot;
 116         u_int  eisaBase;
 117         u_int  i;
 118         int ret = -ENODEV;
 119
 120         if (aic7xxx_probe_eisa_vl == 0)
 121                 return ret;
 122
 123         eisaBase = 0x1000 + AHC_EISA_SLOT_OFFSET;
 124         for (slot = 1; slot < NUMSLOTS; eisaBase+=0x1000, slot++) {
 125                 uint32_t eisa_id;
 126                 size_t   id_size;
 127
 128                 if (request_region(eisaBase, AHC_EISA_IOSIZE, "aic7xxx") == 0)
 129                         continue;
 130
 131                 eisa_id = 0;
 132                 id_size = sizeof(eisa_id);
 133                 for (i = 0; i < 4; i++) {
 134                         /* VLcards require priming*/
 135                         outb(0x80 + i, eisaBase + IDOFFSET);
 136                         eisa_id |= inb(eisaBase + IDOFFSET + i)
 137                                    << ((id_size-i-1) * 8);
 138                 }
 139                 release_region(eisaBase, AHC_EISA_IOSIZE);
 140                 if (eisa_id & 0x80000000)
 141                         continue;  /* no EISA card in slot */
 142
 143                 entry = aic7770_find_device(eisa_id);
 144                 if (entry != NULL) {
 145                         aic7770_linux_config(entry, NULL, eisaBase);
 146                         ret = 0;
 147                 }
 148         }
 149         return ret;
 150 #endif
 151 }
 152
 153 void
 154 ahc_linux_eisa_exit(void)
 155 {
 156         if(aic7xxx_probe_eisa_vl != 0 && aic7770_driver.id_table != NULL) {
 157                 eisa_driver_unregister(&aic7770_driver);
 158                 free(aic7770_driver.id_table, M_DEVBUF);
 159         }
 160 }
 161
 162 static int
 163 aic7770_linux_config(struct aic7770_identity *entry, aic7770_dev_t dev,
 164                      u_int eisaBase)
 165 {
 166         struct  ahc_softc *ahc;
 167         char    buf[80];
 168         char   *name;
 169         int     error;
 170
 171         /*
 172          * Allocate a softc for this card and
 173          * set it up for attachment by our
 174          * common detect routine.
 175          */
 176         sprintf(buf, "ahc_eisa:%d", eisaBase >> 12);
 177         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 178         if (name == NULL)
 179                 return (ENOMEM);
 180         strcpy(name, buf);
 181         ahc = ahc_alloc(&aic7xxx_driver_template, name);
 182         if (ahc == NULL)
 183                 return (ENOMEM);
 184         error = aic7770_config(ahc, entry, eisaBase);
 185         if (error != 0) {
 186                 ahc->bsh.ioport = 0;
 187                 ahc_free(ahc);
 188                 return (error);
 189         }
 190 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 191         dev->driver_data = (void *)ahc;
 192         if (aic7xxx_detect_complete)
 193                 error = ahc_linux_register_host(ahc, &aic7xxx_driver_template);
 194 #endif
 195         return (error);
 196 }
 197
 198 int
 199 aic7770_map_registers(struct ahc_softc *ahc, u_int port)
 200 {
 201         /*
 202          * Lock out other contenders for our i/o space.
 203          */
 204         if (request_region(port, AHC_EISA_IOSIZE, "aic7xxx") == 0)
 205                 return (ENOMEM);
 206         ahc->tag = BUS_SPACE_PIO;
 207         ahc->bsh.ioport = port;
 208         return (0);
 209 }
 210
 211 int
 212 aic7770_map_int(struct ahc_softc *ahc, u_int irq)
 213 {
 214         int error;
 215         int shared;
 216
 217         shared = 0;
 218         if ((ahc->flags & AHC_EDGE_INTERRUPT) == 0)
 219                 shared = SA_SHIRQ;
 220
 221         error = request_irq(irq, ahc_linux_isr, shared, "aic7xxx", ahc);
 222         if (error == 0)
 223                 ahc->platform_data->irq = irq;
 224
 225         return (-error);
 226 }
 227
 228 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 229 static int
 230 aic7770_eisa_dev_probe(struct device *dev)
 231 {
 232         struct eisa_device *edev;
 233
 234         edev = to_eisa_device(dev);
 235         return (aic7770_linux_config(aic7770_ident_table + edev->id.driver_data,
 236                                     dev, edev->base_addr+AHC_EISA_SLOT_OFFSET));
 237 }
 238
 239 static int
 240 aic7770_eisa_dev_remove(struct device *dev)
 241 {
 242         struct ahc_softc *ahc;
 243         u_long l;
 244
 245         /*
 246          * We should be able to just perform
 247          * the free directly, but check our
 248          * list for extra sanity.
 249          */
 250         ahc_list_lock(&l);
 251         ahc = ahc_find_softc((struct ahc_softc *)dev->driver_data);
 252         if (ahc != NULL) {
 253                 u_long s;
 254
 255                 ahc_lock(ahc, &s);
 256                 ahc_intr_enable(ahc, FALSE);
 257                 ahc_unlock(ahc, &s);
 258                 ahc_free(ahc);
 259         }
 260         ahc_list_unlock(&l);
 261
 262         return (0);
 263 }
 264 #endif