linux/Documentation/scsi/ChangeLog.sym53c8xx
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   1Sat May 12 12:00 2001 Gerard Roudier (groudier@club-internet.fr)
   2        * version sym53c8xx-1.7.3c
   3        - Ensure LEDC bit in GPCNTL is cleared when reading the NVRAM.
   4          Fix sent by Stig Telfer <stig@api-networks.com>.
   5        - Backport from SYM-2 the work-around that allows to support 
   6          hardwares that fail PCI parity checking.
   7        - Check that we received at least 8 bytes of INQUIRY response 
   8          for byte 7, that contains device capabilities, to be valid.
   9        - Define scsi_set_pci_device() as nil for kernel < 2.4.4.
  10        - + A couple of minor changes.
  11          
  12Sat Apr 7 19:30 2001 Gerard Roudier (groudier@club-internet.fr)
  13        * version sym53c8xx-1.7.3b
  14        - Fix an unaligned LOAD from scripts (was used as dummy read).
  15        - In ncr_soft_reset(), only try to ABORT the current operation 
  16          for chips that support SRUN bit in ISTAT1 and if SCRIPTS are 
  17          currently running, as 896 and 1010 manuals suggest.
  18        - In the CCB abort path, do not assume that the CCB is currently 
  19          queued to SCRIPTS. This is not always true, notably after a 
  20          QUEUE FULL status or when using untagged commands.
  21
  22Sun Mar 4 18:30 2001 Gerard Roudier (groudier@club-internet.fr)
  23        * version sym53c8xx-1.7.3a
  24        - Fix an issue in the ncr_int_udc() (unexpected disconnect)
  25          handling. If the DSA didn't match a CCB, a bad write to 
  26          memory could happen.
  27
  28Mon Feb 12 22:30 2001 Gerard Roudier (groudier@club-internet.fr)
  29        * version sym53c8xx-1.7.3
  30        - Support for hppa.
  31          Tiny patch sent to me by Robert Hirst.
  32        - Tiny patch for ia64 sent to me by Pamela Delaney.
  33
  34Tue Feb 6 13:30 2001 Gerard Roudier (groudier@club-internet.fr)
  35        * version sym53c8xx-1.7.3-pre1
  36        - Call pci_enable_device() as AC wants this to be done.
  37        - Get both the BAR cookies used by CPU and actual PCI BAR 
  38          values used from SCRIPTS. Recent PCI chips are able to 
  39          access themselves using internal cycles, but they compare 
  40          BAR values to destination address to make decision.
  41          Earlier chips simply use PCI transactions to access IO 
  42          registers from SCRIPTS.
  43          The bus_dvma_to_mem() interface that reverses the actual 
  44          PCI BAR value from the BAR cookie is now useless.
  45          This point had been discussed at the list and the solution 
  46          got approved by PCI code maintainer (Martin Mares).
  47        - Merge changes for linux-2.4 that declare the host template 
  48          in the driver object also when the driver is statically 
  49          linked with the kernel.
  50        - Increase SCSI message size up to 12 bytes, given that 8 
  51          bytes was not enough for the PPR message (fix).
  52        - Add field 'maxoffs_st' (max offset for ST data transfers).
  53          The C1010 supports offset 62 in DT mode but only 31 in 
  54          ST mode, to 2 different values for the max SCSI offset 
  55          are needed. Replace the obviously wrong masking of the 
  56          offset against 0x1f for ST mode by a lowering to 
  57          maxoffs_st of the SCSI offset in ST mode.
  58        - Refine a work-around for the C1010-66. Revision 1 does 
  59          not requires extra cycles in DT DATA OUT phase.
  60        - Add a missing endian-ization (abrt_tbl.addr).
  61        - Minor clean-up in the np structure for fields accessed 
  62          from SCRIPTS that requires special alignments.
  63
  64Sun Sep 24 21:30 2000 Gerard Roudier (groudier@club-internet.fr)
  65        * version sym53c8xx-1.7.2
  66        - Remove the hack for PPC added in previous driver version.
  67        - Add FE_DAC feature bit to distinguish between 64 bit PCI 
  68          addressing (FE_DAC) and 64 bit PCI interface (FE_64BIT).
  69        - Get rid of the boot command line "ultra:" argument.
  70          This parameter wasn't that clever since we can use "sync:" 
  71          for Ultra/Ultra2 settings, and for Ultra3 we may want to 
  72          pass PPR options (for now only DT clocking).
  73        - Add FE_VARCLK feature bit that indicates that SCSI clock 
  74          frequency may vary depending on board design and thus, 
  75          the driver should try to evaluate the SCSI clock.
  76        - Simplify the way the driver determine the SCSI clock:
  77          ULTRA3 -> 160 MHz, ULTRA2 -> 80 MHz otherwise 40 MHz.
  78          Measure the SCSI clock frequency if FE_VARCLK is set.
  79        - Remove FE_CLK80 feature bit that got useless.
  80        - Add support for the SYM53C875A (Pamela Delaney).
  81
  82Wed Jul 26 23:30 2000 Gerard Roudier (groudier@club-internet.fr)
  83        * version sym53c8xx-1.7.1
  84        - Provide OpenFirmware path through the proc FS on PPC.
  85        - Download of on-chip SRAM using memcpy_toio() doesn't work 
  86          on PPC. Restore previous method (MEMORY MOVE from SCRIPTS).
  87        - Remove trailing argument #2 from a couple of #undefs.
  88
  89Sun Jul 09 16:30 2000 Gerard Roudier (groudier@club-internet.fr)
  90        * version sym53c8xx-1.7.0
  91        - Remove the PROFILE C and SCRIPTS code.
  92          This facility was not this useful and thus was not longer 
  93          desirable given the increasing complexity of the driver code.
  94        - Merges from FreeBSD sym-1.6.2 driver:
  95          * Clarify memory barriers needed by the driver for architectures 
  96            that implement a weak memory ordering.
  97          * Simpler handling of illegal phases and data overrun from 
  98            SCRIPTS. These errors are now immediately reported to 
  99            the C code by an interrupt.
 100          * Sync the residual handling code with sym-1.6.2 and now 
 101            report `resid' to user for linux version >= 2.3.99 
 102        - General cleanup:
 103          Move definitions for barriers and IO/MMIO operations to the 
 104          sym53c8xx_defs.h header files. They are now shared by the 
 105          both drivers.
 106          Remove unused options that claimed to optimize for the 896.
 107          If fact, they were not this clever. :)
 108          Use SCSI_NCR_IOMAPPED instead of NCR_IOMAPPED.
 109          Remove a couple of unused fields from data structures.
 110
 111Thu May 11 12:40 2000 Pam Delaney (pam.delaney@lsil.com)
 112        * version sym53c8xx-1.6b
 113        - Merged version.
 114
 115Mon Apr 24 12:00 2000 Gerard Roudier (groudier@club-internet.fr)
 116        * version sym53c8xx-1.5m
 117        - Return value 1 (instead of 0) from the driver setup routine.
 118        - Do not enable PCI DAC cycles. This just broke support for 
 119          SYM534C896 on sparc64. Problem fixed by David S. Miller.
 120
 121Fri Apr 14 9:00 2000 Pam Delaney (pam.delaney@lsil.com)
 122        * version sym53c8xx-1.6b-9
 123        - Added 53C1010_66 support.
 124        - Small fix to integrity checking code.
 125        - Removed requirement for integrity checking if want to run
 126          at ultra 3.
 127 
 128Sat Apr 1  12:00 2000 Gerard Roudier (groudier@club-internet.fr)
 129        * version sym53c8xx-1.5l
 130        - Tiny change for __sparc__ appeared in 2.3.99-pre4.1 that 
 131          applies to cache line size (? Probably from David S Miller).
 132        - Make sure no data transfer will happen for Scsi_Cmnd requests 
 133          that supply SCSI_DATA_NONE direction (this avoids some BUG() 
 134          statement in the PCI code when a data buffer is also supplied).
 135
 136Sat Mar 11 12:00 2000 Gerard Roudier (groudier@club-internet.fr)
 137        * version sym53c8xx-1.6b-5
 138        - Test against expected data transfer direction from SCRIPTS.
 139        - Add support for the new dynamic dma mapping kernel interface.
 140          Requires Linux-2.3.47 (tested with pre-2.3.47-6).
 141          Many thanks to David S. Miller for his preliminary changes 
 142          that have been useful guidelines.
 143        - Get data transfer direction from the scsi command structure 
 144          (Scsi_Cmnd) with kernels that provide this information.
 145
 146Mon Mar  6 23:30 2000 Gerard Roudier (groudier@club-internet.fr)
 147        * version sym53c8xx-1.5k
 148        - Test against expected data transfer direction from SCRIPTS.
 149        - Revert the change in 'ncr_flush_done_cmds()' but unmap the 
 150          scsi dma buffer prior to queueing the command to our done 
 151          list.
 152        - Miscellaneous (minor) fixes in the code added in driver 
 153          version 1.5j.
 154
 155Mon Feb 14 4:00 2000 Pam Delaney (pam.delaney@lsil.com)
 156        * version sym53c8xx-pre-1.6b-2.
 157        - Updated the SCRIPTS error handling of the SWIDE
 158          condition - to remove any reads of the sbdl
 159          register. Changes needed because the 896 and 1010
 160          chips will check parity in some special circumstances.
 161          This will cause a parity error interrupt if not in
 162          data phase.  Changes based on those made in the
 163          FreeBSD driver version 1.3.2.
 164
 165Sun Feb 20 11:00 2000 Gerard Roudier (groudier@club-internet.fr)
 166        * version sym53c8xx-1.5j
 167        - Add support for the new dynamic dma mapping kernel interface.
 168          Requires Linux-2.3.47 (tested with pre-2.3.47-6).
 169          Many thanks to David S. Miller for his preliminary changes 
 170          that have been useful guidelines, for having reviewed the 
 171          code and having tested this driver version on Ultra-Sparc.
 172        - 2 tiny bugs fixed in the PCI wrapper that provides support 
 173          for early kernels without pci device structure.
 174        - Get data transfer direction from the scsi command structure 
 175          (Scsi_Cmnd) with kernels that provide this information.
 176        - Fix an old bug that only affected 896 rev. 1 when driver 
 177          profile support option was set in kernel configuration.
 178
 179Fri Jan 14 14:00 2000 Pam Delaney (pam.delaney@lsil.com)
 180        * version sym53c8xx-pre-1.6b-1.
 181        - Merge parallel driver series 1.61 and 1.5e 
 182
 183Tue Jan 11 14:00 2000 Pam Delaney (pam.delaney@lsil.com)
 184        * version sym53c8xx-1.61
 185        - Added support for mounting disks on wide-narrow-wide
 186          scsi configurations. 
 187        - Modified offset to be a maximum of 31 in ST mode, 
 188          62 in DT mode.
 189        - Based off of 1.60
 190
 191Mon Jan 10 10:00 2000 Pam Delaney (pam.delaney@lsil.com)
 192        * version sym53c8xx-1.60
 193        - Added capability to use the integrity checking code
 194          in the kernel (optional).
 195        -  Added PPR negotiation.
 196        - Added support for 53C1010 Ultra 3 part.
 197        - Based off of 1.5f
 198
 199Sat Jan 8  22:00 2000 Gerard Roudier (groudier@club-internet.fr)
 200        * version sym53c8xx-1.5h
 201        - Add year 2000 copyright.
 202        - Display correctly bus signals when bus is detected wrong.
 203        - Some fix for Sparc from DSM that went directly to kernel tree.
 204
 205Mon Dec 6  22:00 1999 Gerard Roudier (groudier@club-internet.fr)
 206        * version sym53c8xx-1.5g
 207        - Change messages written by the driver at initialisation and 
 208          through the /proc FS (rather cosmetic changes that consist in
 209          printing out the PCI bus number and PCI device/function).
 210        - Ensure the SCRIPTS processor is stopped while calibrating the 
 211          SCSI clock (the initialisation code has been a bit reworked).
 212          Change moved to the FreeBSD sym_hipd driver).
 213        - Some fixes in the MODIFY_DP/IGN_RESIDUE code and residual 
 214          calculation (moved from FreeBSD sym_hipd driver).
 215        - Add NVRAM support for Tekram boards that use 24C16 EEPROM.
 216          Code moved from the FreeBSD sym_hipd driver, since it has 
 217          been that one that got this feature first.
 218        - Definitely disable overlapped PCI arbitration for all dual 
 219          function chips, since I cannot make sure for what chip revisions 
 220          it is actually safe.
 221        - Add support for the SYM53C1510D (also for ncr53c8xx).
 222        - Fix up properly the PCI latency timer when needed or asked for.
 223        - Get rid of the old PCI bios interface, but preserve kernel 2.0 
 224          compatibility from a simple wrapper.
 225        - Update the poor Tekram sync factor table.
 226        - Fix in a tiny 'printk' bug that may oops in case of extended 
 227          errors (unrecovered parity error, data overrun, etc ...)
 228          (Sent by Pamela Delaney from LSILOGIC)
 229        - Remove the compilation condition about having to acquire the 
 230          io_request_lock since it seems to be a definite feature now.:)
 231        - Change get_pages by GetPages since Linux >= 2.3.27 now wants 
 232          get_pages to ever be used as a kernel symbol (from 2.3.27).
 233        - proc_dir structure no longer needed for kernel >= 2.3.27.
 234
 235Sun Oct  3  19:00 1999 Gerard Roudier (groudier@club-internet.fr)
 236        * version sym53c8xx-1.5f
 237        - Change the way the driver checks the PCI clock frequency, so 
 238          that overclocked PCI BUS up to 48 MHz will not be refused.
 239          The more the BUS is overclocked, the less the driver will 
 240          guarantee that its measure of the SCSI clock is correct.
 241        - Backport some minor improvements of SCRIPTS from the sym_hipd 
 242          driver.
 243        - Backport the code rewrite of the START QUEUE dequeuing (on 
 244          bad scsi status received) from the sym_hipd driver.
 245
 246Sat Sep 11  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
 247        * version sym53c8xx-1.5e
 248        - New linux-2.3.13 __setup scheme support added.
 249        - Cleanup of the extended error status handling:
 250          Use 1 bit per error type.
 251        - Also save the extended error status prior to auto-sense.
 252        - Add the FE_DIFF chip feature bit to indicate support of 
 253          diff probing from GPIO3 (825/825A/876/875).
 254        - Remove the quirk handling that has been useless since day one.
 255        - Work-around PCI chips being reported twice on some platforms.
 256        - Add some redundant PCI reads in order to deal with common 
 257          bridge misbehaviour regarding posted write flushing.
 258        - Add some other conditionnal code for people who have to deal 
 259          with really broken bridges (they will have to edit a source 
 260          file to try these options).
 261        - Handle correctly (hopefully) jiffies wrap-around.
 262        - Restore the entry used to detect 875 until revision 0xff.
 263          (I removed it inadvertently, it seems :) )
 264        - Replace __initfunc() which is deprecated stuff by __init which 
 265          is not yet so. ;-)
 266        - Rewrite the MESSAGE IN scripts more generic by using a MOVE 
 267          table indirect. Extended messages of any size are accepted now.
 268          (Size is limited to 8 for now, but a constant is just to be 
 269          increased if necessary)
 270        - Fix some bug in the fully untested MDP handling:) and share 
 271          some code between MDP handling and residual calculation.
 272        - Calculate the data transfer residual as the 2's complement 
 273          integer (A positive value in returned on data overrun, and 
 274          a negative one on underrun).
 275        - Add support of some 'resource handling' for linux-2.3.13.
 276          Basically the BARs have been changed to something more complex 
 277          in the pci_dev structure.
 278        - Remove some deprecated code.
 279
 280Sat Jun  5  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
 281        * version sym53c8xx-1.5c
 282        - Do not negotiate on auto-sense if we are currently using 8 bit 
 283          async transfer for the target.
 284        - Only check for SISL/RAID on i386 platforms.
 285          (A problem has been reported on PPC with that code).
 286        - On MSG REJECT for a negotiation, the driver attempted to restart 
 287          the SCRIPT processor when this one was already running.
 288
 289Sat May 29  12:00 1999 Gerard Roudier (groudier@club-internet.fr)
 290        * version sym53c8xx-1.5b
 291        - Force negotiation prior auto-sense.
 292          This ensures that the driver will be able to grab the sense data 
 293          from a device that has received a BUS DEVICE RESET message from 
 294          another initiator.
 295        - Complete all disconnected CCBs for a logical UNIT if we are told 
 296          about a UNIT ATTENTION for a RESET condition by this target.
 297        - Add the control command 'cleardev' that allows to send a ABORT  
 298          message to a logical UNIT (for test purpose).
 299
 300Tue May 25  23:00 1999 Gerard Roudier (groudier@club-internet.fr)
 301        * version sym53c8xx-1.5a
 302        - Add support for task abort and bus device reset SCSI message 
 303          and implement proper synchonisation with SCRIPTS to handle 
 304          correctly task abortion without races.
 305        - Send an ABORT message (if untagged) or ABORT TAG message (if tagged)
 306          when the driver is told to abort a command that is disconnected and 
 307          complete the command with appropriate error.
 308          If the aborted command is not yet started, remove it from the start 
 309          queue and complete it with error.
 310        - Add the control command 'resetdev' that allows to send a BUS 
 311          DEVICE RESET message to a target (for test purpose).
 312        - Clean-up some unused or useless code.
 313
 314Fri May 21  23:00 1999 Gerard Roudier (groudier@club-internet.fr)
 315        * version sym53c8xx-1.5
 316        - Add support for CHMOV with Wide controllers.
 317        - Handling of the SWIDE (low byte residue at the end of a CHMOV 
 318          in DATA IN phase with WIDE transfer when the byte count gets odd).
 319        - Handling of the IGNORE WIDE RESIDUE message.
 320          Handled from SCRIPTS as possible with some optimizations when both 
 321          a wide device and the controller are odd at the same time (SWIDE 
 322          present and IGNORE WIDE RESIDUE message on the BUS at the same time).
 323        - Check against data OVERRUN/UNDERRUN condition at the end of a data 
 324          transfer, whatever a SWIDE is present (OVERRUN in DATA IN phase) 
 325          or the SODL is full (UNDERRUN in DATA out phase).
 326        - Handling of the MODIFY DATA POINTER message.
 327          This one cannot be handled from SCRIPTS, but hopefully it will not
 328          happen very often. :)
 329        - Large rewrite of the SCSI MESSAGE handling.
 330
 331Sun May 9  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
 332        * version sym53c8xx-1.4
 333        - Support for IMMEDIATE ARBITRATION.
 334          See the README file for detailed information about this feature.
 335          Requires both a compile option and a boot option.
 336        - Minor SCRIPTS optimization in reselection pattern for LUN 0.
 337        - Simpler algorithm to deal with SCSI command starvation.
 338          Just use 2 tag counters in flip/flop and switch to the other 
 339          one every 3 seconds.
 340        - Do some work in SCRIPTS after the SELECT instruction and prior 
 341          to testing for a PHASE. SYMBIOS say this feature is working fine. 
 342          (Btw, only problems with Toshiba 3401B had been reported).
 343        - Measure the PCI clock speed and do not attach controllers if 
 344          result is greater than 37 MHz. Since the precision of the 
 345          algorithm (from Stefan Esser) is better than 2%, this should 
 346          be fine.
 347        - Fix the misdetection of SYM53C875E (was detected as a 876).
 348        - Fix the misdetection of SYM53C810 not A (was detected as a 810A).
 349        - Support for up to 256 TAGS per LUN (CMD_PER_LUN).
 350          Currently limited to 255 due to Linux limitation. :)
 351        - Support for up to 508 active commands (CAN_QUEUE).
 352        - Support for the 53C895A by Pamela Delaney <pam.delaney@lsil.com>
 353          The 53C895A contains all of the features of the 896 but has only 
 354          one channel and has a 32 bit PCI bus. It does 64 bit PCI addressing 
 355          using dual cycle PCI data transfers.
 356        - Miscellaneous minor fixes.
 357        - Some additions to the README.ncr53c8xx file.
 358
 359Tue Apr 15  10:00 1999 Gerard Roudier (groudier@club-internet.fr)
 360        * version sym53c8xx-1.3e
 361        - Support for any number of LUNs (64) (SPI2-compliant).
 362          (Btw, this may only be ever useful under linux-2.2 ;-))
 363
 364Sun Apr 11  10:00 1999 Gerard Roudier (groudier@club-internet.fr)
 365        * version sym53c8xx-1.3d
 366        - Add 'hostid:#id' boot option. This option allows to change the 
 367          default SCSI id the driver uses for controllers.
 368        - Make SCRIPTS not use self-mastering for PCI.
 369          There were still 2 places the driver used this feature of the 
 370          53C8XX family.
 371        - Move some data structures (nvram layouts and driver set-up) to 
 372          the sym53c8xx_defs.h file. So, the both drivers will share them.
 373        - Set MAX LUNS to 16 (instead of 8).
 374
 375Sat Mar 20  21:00 1999 Gerard Roudier (groudier@club-internet.fr)
 376        * version sym53c8xx-1.3b
 377        - Add support for NCR PQS PDS.
 378          James Bottomley <James.Bottomley@columbiasc.ncr.com>
 379        - Allow value 0 for host ID.
 380        - Support more than 8 controllers (> 40 in fact :-) )
 381        - Add 'excl=#ioaddr' boot option: exclude controller.
 382          (Version 1.3a driver)
 383
 384Thu Mar 11  23:00 1999 Gerard Roudier (groudier@club-internet.fr)
 385        * version sym53c8xx-1.3   (8xx-896 driver bundle)
 386        - Equivalent changes as ncr53c8xx-3.2 due to the driver bundle.
 387          (See Changelog.ncr53c8xx)
 388        - Do a normal soft reset as first chip reset, since aborting current 
 389          operation may raise an interrupt we are not able to handle since 
 390          the interrupt handler is not yet established.
 391
 392Sat Mar 6  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
 393        * version sym53c8xx-1.2b
 394        - Fix some oooold bug that hangs the bus if a device rejects a 
 395          negotiation. Btw, the corresponding stuff also needed some cleanup 
 396          and thus the change is a bit larger than it could have been.
 397        - Still some typo that made compilation fail for 64 bit (trivial fix).
 398
 399Sun Feb 21  20:00 1999 Gerard Roudier (groudier@club-internet.fr)
 400        * version sym53c8xx-1.2a
 401        - The rewrite of the interrupt handling broke the SBMC interrupt 
 402          handling due to a 1 bit mask tiny error. Hopefully fixed.
 403        - If INQUIRY came from a scatter list, the driver looked into 
 404          the scatterlist instead of the data.:) Since this should never
 405          happen, we just discard the data if use_sg is not zero.
 406
 407Fri Feb 12  23:00 1999 Gerard Roudier (groudier@club-internet.fr)
 408        * version sym53c8xx-1.2
 409        - Major rewrite of the interrupt handling and recovery stuff for 
 410          the support of non compliant SCSI removal, insertion and all 
 411          kinds of screw-up that may happen on the SCSI BUS.
 412          Hopefully, the driver is now unbreakable or may-be, it is just 
 413          quite brocken. :-)
 414          Many thanks to Johnson Russel (Symbios) for having responded to 
 415          my questions and for his interesting advices and comments about 
 416          support of SCSI hot-plug.
 417        - Add 'recovery' option to driver set-up.
 418        - Negotiate SYNC data transfers with CCS devices.
 419        - Deal correctly with 64 bit PCI address registers on Linux 2.2.
 420          Pointed out by Leonard Zubkoff.
 421
 422Sun Jan 31  18:00 1999 Gerard Roudier (groudier@club-internet.fr)
 423        * version sym53c8xx-1.1a
 424        - Some 896 chip revisions (all for now :-)), may hang-up if the 
 425          soft reset bit is set at the wrong time while SCRIPTS are running.
 426          We need to first abort the current SCRIPTS operation prior to 
 427          resetting the chip. This fix has been sent to me by SYMBIOS/LSI 
 428          and I just translated it into ncr53c8xx syntax.
 429          Must be considered 100 % trustable, unless I did some mistake 
 430          when translating it. :-)
 431
 432Sun Jan 24  18:00 1999 Gerard Roudier (groudier@club-internet.fr)
 433        * version sym53c8xx-1.1
 434        - Major rewrite of the SCSI parity error handling.
 435          The informations contained in the data manuals are incomplete about 
 436          this feature.
 437          I asked SYMBIOS about and got in reply the explanations that are 
 438          _indeed_ missing in the data manuals.
 439        - Allow to tune request_irq() flags from the boot command line using 
 440          ncr53c8xx=irqm:??, as follows:
 441          a) If bit 0x10 is set in irqm, SA_SHIRQ flag is not used.
 442          b) If bit 0x20 is set in irqm, SA_INTERRUPT flag is not used.
 443          By default the driver uses both SA_SHIRQ and SA_INTERRUPT.
 444          Option 'ncr53c8xx=irqm:0x20' may be used when an IRQ is shared by 
 445          a 53C8XX adapter and a network board.
 446        - Fix for 64 bit PCI address register calculation. (Lance Robinson)
 447        - Fix for big-endian in phase mismatch handling. (Michal Jaegermann)
 448
 449Fri Jan  1  20:00 1999 Gerard Roudier (groudier@club-internet.fr)
 450        * version sym53c8xx-1.0a
 451        - Waiting list look-up didn't work for the first command of the list.
 452          Hopefully fixed, but tested on paper only. ;)
 453        - Remove the most part of PPC specific code for Linux-2.2.
 454          Thanks to Cort.
 455        - Some other minors changes.
 456
 457Sat Dec 19  21:00 1998 Gerard Roudier (groudier@club-internet.fr)
 458        * version sym53c8xx-1.0
 459        - Define some new IO registers for the 896 (istat1, mbox0, mbox1)
 460        - Revamp slightly the Symbios NVRAM lay-out based on the excerpt of 
 461          the header file I received from Symbios.
 462        - Check the PCI bus number for the boot order (Using a fast 
 463          PCI controller behing a PCI-PCI bridge seems sub-optimal).
 464        - Disable overlapped PCI arbitration for the 896 revision 1.
 465        - Reduce a bit the number of IO register reads for phase mismatch 
 466          by reading DWORDS at a time instead of BYTES.
 467
 468Thu Dec  3  24:00 1998 Gerard Roudier (groudier@club-internet.fr)
 469        * version pre-sym53c8xx-0.18
 470        - I received this afternoon a 896 from SYMBIOS and started testing  
 471          the driver with this beast. After having fixed 3 buglets, it worked  
 472          with all features enabled including the phase mismatch handling 
 473          from SCRIPTS. Since this feature is not yet tested enough, the 
 474          boot option 'ncr53c8xx=specf:1' is still required to enable the 
 475          driver to handle PM from SCRIPTS. 
 476
 477Sun Nov 29  18:00 1998 Gerard Roudier (groudier@club-internet.fr)
 478        * version pre-sym53c8xx-0.17
 479        - The SISL RAID change requires now remap_pci_mem() stuff to be 
 480          compiled for __i386__ when normal IOs are used.
 481        - The PCI memory read from SCRIPTS that should ensure ordering 
 482          was in fact misplaced. BTW, this may explain why broken PCI 
 483          device drivers regarding ordering are working so well. ;-)
 484        - Rewrite ncr53c8xx_setup (boot command line options) since the  
 485          binary code was a bit too bloated in my opinion.
 486        - Make the code simpler in the wakeup_done routine.
 487
 488Tue Nov 24  23:00 1998 Gerard Roudier (groudier@club-internet.fr)
 489        * version pre-sym53c8xx-0.16
 490        - Add SCSI_NCR_OPTIMIZE_896_1 compile option and 'optim' boot option.
 491          When set, the driver unconditionnaly assumes that the interrupt 
 492          handler is called for command completion, then clears INTF, scans 
 493          the done queue and returns if some completed CCB is found. If no 
 494          completed CCB are found, interrupt handling will proceed normally.
 495          With a 896 that handles MA from SCRIPTS, this can be a great win, 
 496          since the driver will never performs PCI read transactions, but 
 497          only PCI write transactions that may be posted.
 498          If the driver haven't to also raise the SIGP this would be perfect.
 499          Even with this penalty, I think that this will work great.
 500          Obviously this optimization makes sense only if the IRQ is not 
 501          shared with another device.
 502        - Still a buglet in the tags initial settings that needed to be fixed.
 503          It was not possible to disable TGQ at system startup for devices 
 504          that claim TGQ support. The driver used at least 2 for the queue 
 505          depth but did'nt keep track of user settings for tags depth lower 
 506          than 2.
 507
 508Thu Nov 19  23:00 1998 Gerard Roudier (groudier@club-internet.fr)
 509        * version pre-sym53c8xx-0.15
 510        - Add support for hardware LED control of the 896.
 511        - Ignore chips that are driven by SISL RAID (DAC 960).
 512          Change sent by Leonard Zubkoff and slightly reworked.
 513        - Prevent 810A rev 11 and 860 rev 1 from using cache line based 
 514          transactions since those early chip revisions may use such on 
 515          LOAD/STORE instructions (work-around).
 516        - Remove some useless and bloat code from the pci init stuff.
 517        - Do not use the readX()/writeX() kernel functions for __i386__, 
 518          since they perform useless masking operations in order to deal 
 519          with broken driver in 2.1.X kernel.
 520
 521Wed Nov 11  10:00 1998 Gerard Roudier (groudier@club-internet.fr)
 522        * version pre-sym53c8xx-0.14
 523        - The driver was unhappy when configured with default_tags > MAX_TAGS
 524          Hopefully doubly-fixed.
 525        - Set PCI_PARITY in PCI_COMMAND register in not set (PCI fix-up).
 526        - Print out some message if phase mismatch is handled from SCRIPTS.
 527
 528Sun Nov 1  14H00 1998 Gerard Roudier (groudier@club-internet.fr)
 529        * version pre-sym53c8xx-0.13
 530        - Some rewrite of the device detection code. This code had been 
 531          patched too much and needed to be face-lifted a bit.
 532          Remove all platform dependent fix-ups that was not needed or
 533          conflicted with some other driver code as work-arounds.
 534          Reread the NVRAM before the calling of ncr_attach(). This spares 
 535          stack space and so allows to handle more boards.
 536          Handle 64 bit base addresses under linux-2.0.X.
 537          Set MASTER bit in PCI COMMAND register if not set.
 538
 539Wed Oct 30 22H00 1998 Gerard Roudier (groudier@club-internet.fr)
 540        * version pre-sym53c8xx-0.12
 541        - Damned! I just broke the driver for Alpha by leaving a stale 
 542          instruction in the source code. Hopefully fixed.
 543        - Do not set PFEN when it is useless. Doing so we are sure that BOF 
 544          will be active, since the manual appears to be very unclear on what 
 545          feature is actually used by the chip when both PFEN and BOF are 
 546          set.
 547
 548Sat Oct 24 16H00 1998 Gerard Roudier (groudier@club-internet.fr)
 549        * version pre-sym53c8xx-0.11
 550        - LOAD/STORE instructions were miscompiled for register offsets 
 551          beyond 0x7f. This broke accesses to 896' new registers.
 552        - Disable by default Phase Mismatch handling from SCRIPTS, since 
 553          current 896 rev.1 seems not to operate safely with the driver
 554          when this feature is enabled (and above LOAD/STORE fix applied).
 555          I will change the default to 'enabled' when this problem will be 
 556          solved.
 557          Using boot option 'ncr53c8xx=specf:1' enables this feature.
 558        - Implement a work-around (DEL 472 - ITEM 5) that should allow the 
 559          driver to safely enable hardware phase mismatch with 896 rev. 1.
 560
 561Tue Oct 20 22H00 1998 Gerard Roudier (groudier@club-internet.fr)
 562        * version pre-sym53c8xx-0.10
 563        - Add the 53c876 description to the chip table. This is only useful 
 564          for printing the right name of the controller.
 565        - Add additional checking of INQUIRY data:
 566          Check INQUIRY data received length is at least 7. Byte 7 of 
 567          inquiry data contains device features bits and the driver might 
 568          be confused by garbage. Also check peripheral qualifier.
 569        - Use a 1,3,5,...MAXTAGS*2+1 tag numbering. Previous driver could  
 570          use any tag number from 1 to 253 and some non conformant devices  
 571          might have problems with large tag numbers.
 572        - Use NAME53C and NAME53C8XX for chip name prefix chip family name.
 573          Just give a try using "sym53c" and "sym53c8xx" instead of "ncr53c" 
 574          and "ncr53c8xx". :-)
 575
 576Sun Oct 11 17H00 1998 Gerard Roudier (groudier@club-internet.fr)
 577        * version pre-sym53c8xx-0.9
 578        - DEL-441 Item 2 work-around for the 53c876 rev <= 5 (0x15).
 579        - Break ncr_scatter() into 2 functions in order to guarantee best 
 580          possible code optimization for the case we get a scatter list.
 581        - Add the code intended to support up to 1 tera-byte for 64 bit systems.
 582          It is probably too early, but I wanted to complete the thing.
 583
 584Sat Oct 3 14H00 1998 Gerard Roudier (groudier@club-internet.fr)
 585        * version pre-sym53c8xx-0.8
 586        - Do some testing with io_mapped and fix what needed to be so.
 587        - Wait for SCSI selection to complete or time-out immediately after 
 588          the chip won arbitration, since executing SCRIPTS while the SCSI 
 589          core is performing SCSI selection breaks the selection procedure 
 590          at least for some chip revisions.
 591        - Interrupt the SCRIPTS if a device does not go to MSG OUT phase after 
 592          having been selected with ATN. Such a situation is not recoverable, 
 593          better to fail when we are stuck.
 594
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