release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/aic7xxx/aic7770.c

   1 /*
   2  * Product specific probe and attach routines for:
   3  *      27/284X and aic7770 motherboard SCSI controllers
   4  *
   5  * Copyright (c) 1994-1998, 2000, 2001 Justin T. Gibbs.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification.
  14  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  15  *    substantially similar to the "NO WARRANTY" disclaimer below
  16  *    ("Disclaimer") and any redistribution must be conditioned upon
  17  *    including a substantially similar Disclaimer requirement for further
  18  *    binary redistribution.
  19  * 3. Neither the names of the above-listed copyright holders nor the names
  20  *    of any contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * Alternatively, this software may be distributed under the terms of the
  24  * GNU General Public License ("GPL") version 2 as published by the Free
  25  * Software Foundation.
  26  *
  27  * NO WARRANTY
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  36  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  37  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGES.
  39  *
  40  * $Id: //depot/aic7xxx/aic7xxx/aic7770.c#32 $
  41  *
  42  * $FreeBSD$
  43  */
  44
  45 #ifdef __linux__
  46 #include "aic7xxx_osm.h"
  47 #include "aic7xxx_inline.h"
  48 #include "aic7xxx_93cx6.h"
  49 #else
  50 #include <dev/aic7xxx/aic7xxx_osm.h>
  51 #include <dev/aic7xxx/aic7xxx_inline.h>
  52 #include <dev/aic7xxx/aic7xxx_93cx6.h>
  53 #endif
  54
  55 #define ID_AIC7770      0x04907770
  56 #define ID_AHA_274x     0x04907771
  57 #define ID_AHA_284xB    0x04907756 /* BIOS enabled */
  58 #define ID_AHA_284x     0x04907757 /* BIOS disabled*/
  59 #define ID_OLV_274x     0x04907782 /* Olivetti OEM */
  60 #define ID_OLV_274xD    0x04907783 /* Olivetti OEM (Differential) */
  61
  62 static int aic7770_chip_init(struct ahc_softc *ahc);
  63 static int aha2840_load_seeprom(struct ahc_softc *ahc);
  64 static ahc_device_setup_t ahc_aic7770_VL_setup;
  65 static ahc_device_setup_t ahc_aic7770_EISA_setup;
  66 static ahc_device_setup_t ahc_aic7770_setup;
  67
  68 struct aic7770_identity aic7770_ident_table[] =
  69 {
  70         {
  71                 ID_AHA_274x,
  72                 0xFFFFFFFF,
  73                 "Adaptec 274X SCSI adapter",
  74                 ahc_aic7770_EISA_setup
  75         },
  76         {
  77                 ID_AHA_284xB,
  78                 0xFFFFFFFE,
  79                 "Adaptec 284X SCSI adapter",
  80                 ahc_aic7770_VL_setup
  81         },
  82         {
  83                 ID_AHA_284x,
  84                 0xFFFFFFFE,
  85                 "Adaptec 284X SCSI adapter (BIOS Disabled)",
  86                 ahc_aic7770_VL_setup
  87         },
  88         {
  89                 ID_OLV_274x,
  90                 0xFFFFFFFF,
  91                 "Adaptec (Olivetti OEM) 274X SCSI adapter",
  92                 ahc_aic7770_EISA_setup
  93         },
  94         {
  95                 ID_OLV_274xD,
  96                 0xFFFFFFFF,
  97                 "Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
  98                 ahc_aic7770_EISA_setup
  99         },
 100         /* Generic chip probes for devices we don't know 'exactly' */
 101         {
 102                 ID_AIC7770,
 103                 0xFFFFFFFF,
 104                 "Adaptec aic7770 SCSI adapter",
 105                 ahc_aic7770_EISA_setup
 106         }
 107 };
 108 const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);
 109
 110 struct aic7770_identity *
 111 aic7770_find_device(uint32_t id)
 112 {
 113         struct  aic7770_identity *entry;
 114         int     i;
 115
 116         for (i = 0; i < ahc_num_aic7770_devs; i++) {
 117                 entry = &aic7770_ident_table[i];
 118                 if (entry->full_id == (id & entry->id_mask))
 119                         return (entry);
 120         }
 121         return (NULL);
 122 }
 123
 124 int
 125 aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
 126 {
 127         int     error;
 128         int     have_seeprom;
 129         u_int   hostconf;
 130         u_int   irq;
 131         u_int   intdef;
 132
 133         error = entry->setup(ahc);
 134         have_seeprom = 0;
 135         if (error != 0)
 136                 return (error);
 137
 138         error = aic7770_map_registers(ahc, io);
 139         if (error != 0)
 140                 return (error);
 141
 142         /*
 143          * Before we continue probing the card, ensure that
 144          * its interrupts are *disabled*.  We don't want
 145          * a misstep to hang the machine in an interrupt
 146          * storm.
 147          */
 148         ahc_intr_enable(ahc, FALSE);
 149
 150         ahc->description = entry->name;
 151         error = ahc_softc_init(ahc);
 152         if (error != 0)
 153                 return (error);
 154
 155         ahc->bus_chip_init = aic7770_chip_init;
 156
 157         error = ahc_reset(ahc, /*reinit*/FALSE);
 158         if (error != 0)
 159                 return (error);
 160
 161         /* Make sure we have a valid interrupt vector */
 162         intdef = ahc_inb(ahc, INTDEF);
 163         irq = intdef & VECTOR;
 164         switch (irq) {
 165         case 9:
 166         case 10:
 167         case 11:
 168         case 12:
 169         case 14:
 170         case 15:
 171                 break;
 172         default:
 173                 printk("aic7770_config: invalid irq setting %d\n", intdef);
 174                 return (ENXIO);
 175         }
 176
 177         if ((intdef & EDGE_TRIG) != 0)
 178                 ahc->flags |= AHC_EDGE_INTERRUPT;
 179
 180         switch (ahc->chip & (AHC_EISA|AHC_VL)) {
 181         case AHC_EISA:
 182         {
 183                 u_int biosctrl;
 184                 u_int scsiconf;
 185                 u_int scsiconf1;
 186
 187                 biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
 188                 scsiconf = ahc_inb(ahc, SCSICONF);
 189                 scsiconf1 = ahc_inb(ahc, SCSICONF + 1);
 190
 191                 /* Get the primary channel information */
 192                 if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
 193                         ahc->flags |= 1;
 194
 195                 if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
 196                         ahc->flags |= AHC_USEDEFAULTS;
 197                 } else {
 198                         if ((ahc->features & AHC_WIDE) != 0) {
 199                                 ahc->our_id = scsiconf1 & HWSCSIID;
 200                                 if (scsiconf & TERM_ENB)
 201                                         ahc->flags |= AHC_TERM_ENB_A;
 202                         } else {
 203                                 ahc->our_id = scsiconf & HSCSIID;
 204                                 ahc->our_id_b = scsiconf1 & HSCSIID;
 205                                 if (scsiconf & TERM_ENB)
 206                                         ahc->flags |= AHC_TERM_ENB_A;
 207                                 if (scsiconf1 & TERM_ENB)
 208                                         ahc->flags |= AHC_TERM_ENB_B;
 209                         }
 210                 }
 211                 if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
 212                         ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
 213                 break;
 214         }
 215         case AHC_VL:
 216         {
 217                 have_seeprom = aha2840_load_seeprom(ahc);
 218                 break;
 219         }
 220         default:
 221                 break;
 222         }
 223         if (have_seeprom == 0) {
 224                 kfree(ahc->seep_config);
 225                 ahc->seep_config = NULL;
 226         }
 227
 228         /*
 229          * Ensure autoflush is enabled
 230          */
 231         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
 232
 233         /* Setup the FIFO threshold and the bus off time */
 234         hostconf = ahc_inb(ahc, HOSTCONF);
 235         ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
 236         ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
 237
 238         ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
 239         ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;
 240
 241         /*
 242          * Generic aic7xxx initialization.
 243          */
 244         error = ahc_init(ahc);
 245         if (error != 0)
 246                 return (error);
 247
 248         error = aic7770_map_int(ahc, irq);
 249         if (error != 0)
 250                 return (error);
 251
 252         ahc->init_level++;
 253
 254         /*
 255          * Enable the board's BUS drivers
 256          */
 257         ahc_outb(ahc, BCTL, ENABLE);
 258         return (0);
 259 }
 260
 261 static int
 262 aic7770_chip_init(struct ahc_softc *ahc)
 263 {
 264         ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
 265         ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
 266         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
 267         ahc_outb(ahc, BCTL, ENABLE);
 268         return (ahc_chip_init(ahc));
 269 }
 270
 271 /*
 272  * Read the 284x SEEPROM.
 273  */
 274 static int
 275 aha2840_load_seeprom(struct ahc_softc *ahc)
 276 {
 277         struct  seeprom_descriptor sd;
 278         struct  seeprom_config *sc;
 279         int     have_seeprom;
 280         uint8_t scsi_conf;
 281
 282         sd.sd_ahc = ahc;
 283         sd.sd_control_offset = SEECTL_2840;
 284         sd.sd_status_offset = STATUS_2840;
 285         sd.sd_dataout_offset = STATUS_2840;
 286         sd.sd_chip = C46;
 287         sd.sd_MS = 0;
 288         sd.sd_RDY = EEPROM_TF;
 289         sd.sd_CS = CS_2840;
 290         sd.sd_CK = CK_2840;
 291         sd.sd_DO = DO_2840;
 292         sd.sd_DI = DI_2840;
 293         sc = ahc->seep_config;
 294
 295         if (bootverbose)
 296                 printk("%s: Reading SEEPROM...", ahc_name(ahc));
 297         have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
 298                                         /*start_addr*/0, sizeof(*sc)/2);
 299
 300         if (have_seeprom) {
 301
 302                 if (ahc_verify_cksum(sc) == 0) {
 303                         if(bootverbose)
 304                                 printk ("checksum error\n");
 305                         have_seeprom = 0;
 306                 } else if (bootverbose) {
 307                         printk("done.\n");
 308                 }
 309         }
 310
 311         if (!have_seeprom) {
 312                 if (bootverbose)
 313                         printk("%s: No SEEPROM available\n", ahc_name(ahc));
 314                 ahc->flags |= AHC_USEDEFAULTS;
 315         } else {
 316                 /*
 317                  * Put the data we've collected down into SRAM
 318                  * where ahc_init will find it.
 319                  */
 320                 int      i;
 321                 int      max_targ;
 322                 uint16_t discenable;
 323
 324                 max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
 325                 discenable = 0;
 326                 for (i = 0; i < max_targ; i++){
 327                         uint8_t target_settings;
 328
 329                         target_settings = (sc->device_flags[i] & CFXFER) << 4;
 330                         if (sc->device_flags[i] & CFSYNCH)
 331                                 target_settings |= SOFS;
 332                         if (sc->device_flags[i] & CFWIDEB)
 333                                 target_settings |= WIDEXFER;
 334                         if (sc->device_flags[i] & CFDISC)
 335                                 discenable |= (0x01 << i);
 336                         ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
 337                 }
 338                 ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
 339                 ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
 340
 341                 ahc->our_id = sc->brtime_id & CFSCSIID;
 342
 343                 scsi_conf = (ahc->our_id & 0x7);
 344                 if (sc->adapter_control & CFSPARITY)
 345                         scsi_conf |= ENSPCHK;
 346                 if (sc->adapter_control & CFRESETB)
 347                         scsi_conf |= RESET_SCSI;
 348
 349                 if (sc->bios_control & CF284XEXTEND)
 350                         ahc->flags |= AHC_EXTENDED_TRANS_A;
 351                 /* Set SCSICONF info */
 352                 ahc_outb(ahc, SCSICONF, scsi_conf);
 353
 354                 if (sc->adapter_control & CF284XSTERM)
 355                         ahc->flags |= AHC_TERM_ENB_A;
 356         }
 357         return (have_seeprom);
 358 }
 359
 360 static int
 361 ahc_aic7770_VL_setup(struct ahc_softc *ahc)
 362 {
 363         int error;
 364
 365         error = ahc_aic7770_setup(ahc);
 366         ahc->chip |= AHC_VL;
 367         return (error);
 368 }
 369
 370 static int
 371 ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
 372 {
 373         int error;
 374
 375         error = ahc_aic7770_setup(ahc);
 376         ahc->chip |= AHC_EISA;
 377         return (error);
 378 }
 379
 380 static int
 381 ahc_aic7770_setup(struct ahc_softc *ahc)
 382 {
 383         ahc->channel = 'A';
 384         ahc->channel_b = 'B';
 385         ahc->chip = AHC_AIC7770;
 386         ahc->features = AHC_AIC7770_FE;
 387         ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
 388         ahc->flags |= AHC_PAGESCBS;
 389         ahc->instruction_ram_size = 448;
 390         return (0);
 391 }