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/drivers/net/ethernet/dec/tulip/de4x5.c

https://github.com/mturquette/linux
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  1. /*  de4x5.c: A DIGITAL DC21x4x DECchip and DE425/DE434/DE435/DE450/DE500
    2. 

  2.              ethernet driver for Linux.
    3. 

    4. 

  4.     Copyright 1994, 1995 Digital Equipment Corporation.
    5. 

    6. 

  6.     Testing resources for this driver have been made available
    7. 

  7.     in part by NASA Ames Research Center (mjacob@nas.nasa.gov).
    8. 

    9. 

  9.     The author may be reached at davies@maniac.ultranet.com.
    10. 

    11. 

  11.     This program is free software; you can redistribute  it and/or modify it
    12. 

  12.     under  the terms of  the GNU General  Public License as published by the
    13. 

  13.     Free Software Foundation;  either version 2 of the  License, or (at your
    14. 

  14.     option) any later version.
    15. 

    16. 

  16.     THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
    17. 

  17.     WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
    18. 

  18.     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
    19. 

  19.     NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
    20. 

  20.     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    21. 

  21.     NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
    22. 

  22.     USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    23. 

  23.     ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
    24. 

  24.     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    25. 

  25.     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    26. 

    27. 

  27.     You should have received a copy of the  GNU General Public License along
    28. 

  28.     with this program; if not, write  to the Free Software Foundation, Inc.,
    29. 

  29.     675 Mass Ave, Cambridge, MA 02139, USA.
    30. 

    31. 

  31.     Originally,   this  driver  was    written  for the  Digital   Equipment
    32. 

  32.     Corporation series of EtherWORKS ethernet cards:
    33. 

    34. 

  34.         DE425 TP/COAX EISA
    35. 

  35. 	DE434 TP PCI
    36. 

  36. 	DE435 TP/COAX/AUI PCI
    37. 

  37. 	DE450 TP/COAX/AUI PCI
    38. 

  38. 	DE500 10/100 PCI Fasternet
    39. 

    40. 

  40.     but it  will  now attempt  to  support all  cards which   conform to the
    41. 

  41.     Digital Semiconductor   SROM   Specification.    The  driver   currently
    42. 

  42.     recognises the following chips:
    43. 

    44. 

  44.         DC21040  (no SROM)
    45. 

  45. 	DC21041[A]
    46. 

  46. 	DC21140[A]
    47. 

  47. 	DC21142
    48. 

  48. 	DC21143
    49. 

    50. 

  50.     So far the driver is known to work with the following cards:
    51. 

    52. 

  52.         KINGSTON
    53. 

  53. 	Linksys
    54. 

  54. 	ZNYX342
    55. 

  55. 	SMC8432
    56. 

  56. 	SMC9332 (w/new SROM)
    57. 

  57. 	ZNYX31[45]
    58. 

  58. 	ZNYX346 10/100 4 port (can act as a 10/100 bridge!)
    59. 

    60. 

  60.     The driver has been tested on a relatively busy network using the DE425,
    61. 

  61.     DE434, DE435 and DE500 cards and benchmarked with 'ttcp': it transferred
    62. 

  62.     16M of data to a DECstation 5000/200 as follows:
    63. 

    64. 

  64.                 TCP           UDP
    65. 

  65.              TX     RX     TX     RX
    66. 

  66.     DE425   1030k  997k   1170k  1128k
    67. 

  67.     DE434   1063k  995k   1170k  1125k
    68. 

  68.     DE435   1063k  995k   1170k  1125k
    69. 

  69.     DE500   1063k  998k   1170k  1125k  in 10Mb/s mode
    70. 

    71. 

  71.     All  values are typical (in   kBytes/sec) from a  sample  of 4 for  each
    72. 

  72.     measurement. Their error is +/-20k on a quiet (private) network and also
    73. 

  73.     depend on what load the CPU has.
    74. 

    75. 

  75.     =========================================================================
    76. 

  76.     This driver  has been written substantially  from  scratch, although its
    77. 

  77.     inheritance of style and stack interface from 'ewrk3.c' and in turn from
    78. 

  78.     Donald Becker's 'lance.c' should be obvious. With the module autoload of
    79. 

  79.     every  usable DECchip board,  I  pinched Donald's 'next_module' field to
    80. 

  80.     link my modules together.
    81. 

    82. 

  82.     Up to 15 EISA cards can be supported under this driver, limited primarily
    83. 

  83.     by the available IRQ lines.  I have  checked different configurations of
    84. 

  84.     multiple depca, EtherWORKS 3 cards and de4x5 cards and  have not found a
    85. 

  85.     problem yet (provided you have at least depca.c v0.38) ...
    86. 

    87. 

  87.     PCI support has been added  to allow the driver  to work with the DE434,
    88. 

  88.     DE435, DE450 and DE500 cards. The I/O accesses are a bit of a kludge due
    89. 

  89.     to the differences in the EISA and PCI CSR address offsets from the base
    90. 

  90.     address.
    91. 

    92. 

  92.     The ability to load this  driver as a loadable  module has been included
    93. 

  93.     and used extensively  during the driver development  (to save those long
    94. 

  94.     reboot sequences).  Loadable module support  under PCI and EISA has been
    95. 

  95.     achieved by letting the driver autoprobe as if it were compiled into the
    96. 

  96.     kernel. Do make sure  you're not sharing  interrupts with anything  that
    97. 

  97.     cannot accommodate  interrupt  sharing!
    98. 

    99. 

  99.     To utilise this ability, you have to do 8 things:
    100. 

    101. 

  101.     0) have a copy of the loadable modules code installed on your system.
    102. 

  102.     1) copy de4x5.c from the  /linux/drivers/net directory to your favourite
    103. 

  103.     temporary directory.
    104. 

  104.     2) for fixed  autoprobes (not  recommended),  edit the source code  near
    105. 

  105.     line 5594 to reflect the I/O address  you're using, or assign these when
    106. 

  106.     loading by:
    107. 

    108. 

  108.                    insmod de4x5 io=0xghh           where g = bus number
    109. 

  109. 		                                        hh = device number
    110. 

    111. 

  111.        NB: autoprobing for modules is now supported by default. You may just
    112. 

  112.            use:
    113. 

    114. 

  114.                    insmod de4x5
    115. 

    116. 

  116.            to load all available boards. For a specific board, still use
    117. 

  117. 	   the 'io=?' above.
    118. 

  118.     3) compile  de4x5.c, but include -DMODULE in  the command line to ensure
    119. 

  119.     that the correct bits are compiled (see end of source code).
    120. 

  120.     4) if you are wanting to add a new  card, goto 5. Otherwise, recompile a
    121. 

  121.     kernel with the de4x5 configuration turned off and reboot.
    122. 

  122.     5) insmod de4x5 [io=0xghh]
    123. 

  123.     6) run the net startup bits for your new eth?? interface(s) manually
    124. 

  124.     (usually /etc/rc.inet[12] at boot time).
    125. 

  125.     7) enjoy!
    126. 

    127. 

  127.     To unload a module, turn off the associated interface(s)
    128. 

  128.     'ifconfig eth?? down' then 'rmmod de4x5'.
    129. 

    130. 

  130.     Automedia detection is included so that in  principal you can disconnect
    131. 

  131.     from, e.g.  TP, reconnect  to BNC  and  things will still work  (after a
    132. 

  132.     pause whilst the   driver figures out   where its media went).  My tests
    133. 

  133.     using ping showed that it appears to work....
    134. 

    135. 

  135.     By  default,  the driver will  now   autodetect any  DECchip based card.
    136. 

  136.     Should you have a need to restrict the driver to DIGITAL only cards, you
    137. 

  137.     can compile with a  DEC_ONLY define, or if  loading as a module, use the
    138. 

  138.     'dec_only=1'  parameter.
    139. 

    140. 

  140.     I've changed the timing routines to  use the kernel timer and scheduling
    141. 

  141.     functions  so that the  hangs  and other assorted problems that occurred
    142. 

  142.     while autosensing the  media  should be gone.  A  bonus  for the DC21040
    143. 

  143.     auto  media sense algorithm is  that it can now  use one that is more in
    144. 

  144.     line with the  rest (the DC21040  chip doesn't  have a hardware  timer).
    145. 

  145.     The downside is the 1 'jiffies' (10ms) resolution.
    146. 

    147. 

  147.     IEEE 802.3u MII interface code has  been added in anticipation that some
    148. 

  148.     products may use it in the future.
    149. 

    150. 

  150.     The SMC9332 card  has a non-compliant SROM  which needs fixing -  I have
    151. 

  151.     patched this  driver to detect it  because the SROM format used complies
    152. 

  152.     to a previous DEC-STD format.
    153. 

    154. 

  154.     I have removed the buffer copies needed for receive on Intels.  I cannot
    155. 

  155.     remove them for   Alphas since  the  Tulip hardware   only does longword
    156. 

  156.     aligned  DMA transfers  and  the  Alphas get   alignment traps with  non
    157. 

  157.     longword aligned data copies (which makes them really slow). No comment.
    158. 

    159. 

  159.     I  have added SROM decoding  routines to make this  driver work with any
    160. 

  160.     card that  supports the Digital  Semiconductor SROM spec. This will help
    161. 

  161.     all  cards running the dc2114x  series chips in particular.  Cards using
    162. 

  162.     the dc2104x  chips should run correctly with  the basic  driver.  I'm in
    163. 

  163.     debt to <mjacob@feral.com> for the  testing and feedback that helped get
    164. 

  164.     this feature working.  So far we have  tested KINGSTON, SMC8432, SMC9332
    165. 

  165.     (with the latest SROM complying  with the SROM spec  V3: their first was
    166. 

  166.     broken), ZNYX342  and  LinkSys. ZYNX314 (dual  21041  MAC) and  ZNYX 315
    167. 

  167.     (quad 21041 MAC)  cards also  appear  to work despite their  incorrectly
    168. 

  168.     wired IRQs.
    169. 

    170. 

  170.     I have added a temporary fix for interrupt problems when some SCSI cards
    171. 

  171.     share the same interrupt as the DECchip based  cards. The problem occurs
    172. 

  172.     because  the SCSI card wants to  grab the interrupt  as a fast interrupt
    173. 

  173.     (runs the   service routine with interrupts turned   off) vs.  this card
    174. 

  174.     which really needs to run the service routine with interrupts turned on.
    175. 

  175.     This driver will  now   add the interrupt service   routine  as  a  fast
    176. 

  176.     interrupt if it   is bounced from the   slow interrupt.  THIS IS NOT   A
    177. 

  177.     RECOMMENDED WAY TO RUN THE DRIVER  and has been done  for a limited time
    178. 

  178.     until  people   sort  out their  compatibility    issues and the  kernel
    179. 

  179.     interrupt  service code  is  fixed.   YOU  SHOULD SEPARATE OUT  THE FAST
    180. 

  180.     INTERRUPT CARDS FROM THE SLOW INTERRUPT CARDS to ensure that they do not
    181. 

  181.     run on the same interrupt. PCMCIA/CardBus is another can of worms...
    182. 

    183. 

  183.     Finally, I think  I have really  fixed  the module  loading problem with
    184. 

  184.     more than one DECchip based  card.  As a  side effect, I don't mess with
    185. 

  185.     the  device structure any  more which means that  if more than 1 card in
    186. 

  186.     2.0.x is    installed (4  in   2.1.x),  the  user   will have   to  edit
    187. 

  187.     linux/drivers/net/Space.c  to make room for  them. Hence, module loading
    188. 

  188.     is  the preferred way to use   this driver, since  it  doesn't have this
    189. 

  189.     limitation.
    190. 

    191. 

  191.     Where SROM media  detection is used and  full duplex is specified in the
    192. 

  192.     SROM,  the feature is  ignored unless  lp->params.fdx  is set at compile
    193. 

  193.     time  OR during  a   module load  (insmod  de4x5   args='eth??:fdx' [see
    194. 

  194.     below]).  This is because there  is no way  to automatically detect full
    195. 

  195.     duplex   links  except through   autonegotiation.    When I  include the
    196. 

  196.     autonegotiation feature in  the SROM autoconf  code, this detection will
    197. 

  197.     occur automatically for that case.
    198. 

    199. 

  199.     Command  line arguments are  now  allowed, similar  to passing arguments
    200. 

  200.     through LILO. This will allow a per adapter board  set up of full duplex
    201. 

  201.     and media. The only lexical constraints  are: the board name (dev->name)
    202. 

  202.     appears in the list before its  parameters.  The list of parameters ends
    203. 

  203.     either at the end of the parameter list or with another board name.  The
    204. 

  204.     following parameters are allowed:
    205. 

    206. 

  206.             fdx        for full duplex
    207. 

  207. 	    autosense  to set the media/speed; with the following
    208. 

  208. 	               sub-parameters:
    209. 

  209. 		       TP, TP_NW, BNC, AUI, BNC_AUI, 100Mb, 10Mb, AUTO
    210. 

    211. 

  211.     Case sensitivity is important  for  the sub-parameters. They *must*   be
    212. 

  212.     upper case. Examples:
    213. 

    214. 

  214.         insmod de4x5 args='eth1:fdx autosense=BNC eth0:autosense=100Mb'.
    215. 

    216. 

  216.     For a compiled in driver, at or above line 548, place e.g.
    217. 

  217. 	#define DE4X5_PARM "eth0:fdx autosense=AUI eth2:autosense=TP"
    218. 

    219. 

  219.     Yes,  I know full duplex isn't  permissible on BNC  or AUI; they're just
    220. 

  220.     examples. By default, full duplex is turned off and  AUTO is the default
    221. 

  221.     autosense setting.  In reality, I expect only  the full duplex option to
    222. 

  222.     be used. Note the use of single quotes in the two examples above and the
    223. 

  223.     lack of commas to separate items. ALSO, you must get the requested media
    224. 

  224.     correct in relation to what the adapter SROM says it has. There's no way
    225. 

  225.     to  determine this in  advance other than by  trial and error and common
    226. 

  226.     sense, e.g. call a BNC connectored port 'BNC', not '10Mb'.
    227. 

    228. 

  228.     Changed the bus probing.  EISA used to be  done first,  followed by PCI.
    229. 

  229.     Most people probably don't even know  what a de425 is today and the EISA
    230. 

  230.     probe has messed  up some SCSI cards  in the past,  so now PCI is always
    231. 

  231.     probed  first  followed by  EISA if  a) the architecture allows EISA and
    232. 

  232.     either  b) there have been no PCI cards detected or  c) an EISA probe is
    233. 

  233.     forced by  the user.  To force  a probe  include  "force_eisa"  in  your
    234. 

  234.     insmod "args" line;  for built-in kernels either change the driver to do
    235. 

  235.     this  automatically  or include  #define DE4X5_FORCE_EISA  on or  before
    236. 

  236.     line 1040 in the driver.
    237. 

    238. 

  238.     TO DO:
    239. 

  239.     ------
    240. 

    241. 

  241.     Revision History
    242. 

  242.     ----------------
    243. 

    244. 

  244.     Version   Date        Description
    245. 

    246. 

  246.       0.1     17-Nov-94   Initial writing. ALPHA code release.
    247. 

  247.       0.2     13-Jan-95   Added PCI support for DE435's.
    248. 

  248.       0.21    19-Jan-95   Added auto media detection.
    249. 

  249.       0.22    10-Feb-95   Fix interrupt handler call <chris@cosy.sbg.ac.at>.
    250. 

  250.                           Fix recognition bug reported by <bkm@star.rl.ac.uk>.
    251. 

  251. 			  Add request/release_region code.
    252. 

  252. 			  Add loadable modules support for PCI.
    253. 

  253. 			  Clean up loadable modules support.
    254. 

  254.       0.23    28-Feb-95   Added DC21041 and DC21140 support.
    255. 

  255.                           Fix missed frame counter value and initialisation.
    256. 

  256. 			  Fixed EISA probe.
    257. 

  257.       0.24    11-Apr-95   Change delay routine to use <linux/udelay>.
    258. 

  258.                           Change TX_BUFFS_AVAIL macro.
    259. 

  259. 			  Change media autodetection to allow manual setting.
    260. 

  260. 			  Completed DE500 (DC21140) support.
    261. 

  261.       0.241   18-Apr-95   Interim release without DE500 Autosense Algorithm.
    262. 

  262.       0.242   10-May-95   Minor changes.
    263. 

  263.       0.30    12-Jun-95   Timer fix for DC21140.
    264. 

  264.                           Portability changes.
    265. 

  265. 			  Add ALPHA changes from <jestabro@ant.tay1.dec.com>.
    266. 

  266. 			  Add DE500 semi automatic autosense.
    267. 

  267. 			  Add Link Fail interrupt TP failure detection.
    268. 

  268. 			  Add timer based link change detection.
    269. 

  269. 			  Plugged a memory leak in de4x5_queue_pkt().
    270. 

  270.       0.31    13-Jun-95   Fixed PCI stuff for 1.3.1.
    271. 

  271.       0.32    26-Jun-95   Added verify_area() calls in de4x5_ioctl() from a
    272. 

  272.                           suggestion by <heiko@colossus.escape.de>.
    273. 

  273.       0.33     8-Aug-95   Add shared interrupt support (not released yet).
    274. 

  274.       0.331   21-Aug-95   Fix de4x5_open() with fast CPUs.
    275. 

  275.                           Fix de4x5_interrupt().
    276. 

  276.                           Fix dc21140_autoconf() mess.
    277. 

  277. 			  No shared interrupt support.
    278. 

  278.       0.332   11-Sep-95   Added MII management interface routines.
    279. 

  279.       0.40     5-Mar-96   Fix setup frame timeout <maartenb@hpkuipc.cern.ch>.
    280. 

  280.                           Add kernel timer code (h/w is too flaky).
    281. 

  281. 			  Add MII based PHY autosense.
    282. 

  282. 			  Add new multicasting code.
    283. 

  283. 			  Add new autosense algorithms for media/mode
    284. 

  284. 			  selection using kernel scheduling/timing.
    285. 

  285. 			  Re-formatted.
    286. 

  286. 			  Made changes suggested by <jeff@router.patch.net>:
    287. 

  287. 			    Change driver to detect all DECchip based cards
    288. 

  288. 			    with DEC_ONLY restriction a special case.
    289. 

  289. 			    Changed driver to autoprobe as a module. No irq
    290. 

  290. 			    checking is done now - assume BIOS is good!
    291. 

  291. 			  Added SMC9332 detection <manabe@Roy.dsl.tutics.ac.jp>
    292. 

  292.       0.41    21-Mar-96   Don't check for get_hw_addr checksum unless DEC card
    293. 

  293.                           only <niles@axp745gsfc.nasa.gov>
    294. 

  294. 			  Fix for multiple PCI cards reported by <jos@xos.nl>
    295. 

  295. 			  Duh, put the IRQF_SHARED flag into request_interrupt().
    296. 

  296. 			  Fix SMC ethernet address in enet_det[].
    297. 

  297. 			  Print chip name instead of "UNKNOWN" during boot.
    298. 

  298.       0.42    26-Apr-96   Fix MII write TA bit error.
    299. 

  299.                           Fix bug in dc21040 and dc21041 autosense code.
    300. 

  300. 			  Remove buffer copies on receive for Intels.
    301. 

  301. 			  Change sk_buff handling during media disconnects to
    302. 

  302. 			   eliminate DUP packets.
    303. 

  303. 			  Add dynamic TX thresholding.
    304. 

  304. 			  Change all chips to use perfect multicast filtering.
    305. 

  305. 			  Fix alloc_device() bug <jari@markkus2.fimr.fi>
    306. 

  306.       0.43   21-Jun-96    Fix unconnected media TX retry bug.
    307. 

  307.                           Add Accton to the list of broken cards.
    308. 

  308. 			  Fix TX under-run bug for non DC21140 chips.
    309. 

  309. 			  Fix boot command probe bug in alloc_device() as
    310. 

  310. 			   reported by <koen.gadeyne@barco.com> and
    311. 

  311. 			   <orava@nether.tky.hut.fi>.
    312. 

  312. 			  Add cache locks to prevent a race condition as
    313. 

  313. 			   reported by <csd@microplex.com> and
    314. 

  314. 			   <baba@beckman.uiuc.edu>.
    315. 

  315. 			  Upgraded alloc_device() code.
    316. 

  316.       0.431  28-Jun-96    Fix potential bug in queue_pkt() from discussion
    317. 

  317.                           with <csd@microplex.com>
    318. 

  318.       0.44   13-Aug-96    Fix RX overflow bug in 2114[023] chips.
    319. 

  319.                           Fix EISA probe bugs reported by <os2@kpi.kharkov.ua>
    320. 

  320. 			  and <michael@compurex.com>.
    321. 

  321.       0.441   9-Sep-96    Change dc21041_autoconf() to probe quiet BNC media
    322. 

  322.                            with a loopback packet.
    323. 

  323.       0.442   9-Sep-96    Include AUI in dc21041 media printout. Bug reported
    324. 

  324.                            by <bhat@mundook.cs.mu.OZ.AU>
    325. 

  325.       0.45    8-Dec-96    Include endian functions for PPC use, from work
    326. 

  326.                            by <cort@cs.nmt.edu> and <g.thomas@opengroup.org>.
    327. 

  327.       0.451  28-Dec-96    Added fix to allow autoprobe for modules after
    328. 

  328.                            suggestion from <mjacob@feral.com>.
    329. 

  329.       0.5    30-Jan-97    Added SROM decoding functions.
    330. 

  330.                           Updated debug flags.
    331. 

  331. 			  Fix sleep/wakeup calls for PCI cards, bug reported
    332. 

  332. 			   by <cross@gweep.lkg.dec.com>.
    333. 

  333. 			  Added multi-MAC, one SROM feature from discussion
    334. 

  334. 			   with <mjacob@feral.com>.
    335. 

  335. 			  Added full module autoprobe capability.
    336. 

  336. 			  Added attempt to use an SMC9332 with broken SROM.
    337. 

  337. 			  Added fix for ZYNX multi-mac cards that didn't
    338. 

  338. 			   get their IRQs wired correctly.
    339. 

  339.       0.51   13-Feb-97    Added endian fixes for the SROM accesses from
    340. 

  340. 			   <paubert@iram.es>
    341. 

  341. 			  Fix init_connection() to remove extra device reset.
    342. 

  342. 			  Fix MAC/PHY reset ordering in dc21140m_autoconf().
    343. 

  343. 			  Fix initialisation problem with lp->timeout in
    344. 

  344. 			   typeX_infoblock() from <paubert@iram.es>.
    345. 

  345. 			  Fix MII PHY reset problem from work done by
    346. 

  346. 			   <paubert@iram.es>.
    347. 

  347.       0.52   26-Apr-97    Some changes may not credit the right people -
    348. 

  348.                            a disk crash meant I lost some mail.
    349. 

  349. 			  Change RX interrupt routine to drop rather than
    350. 

  350. 			   defer packets to avoid hang reported by
    351. 

  351. 			   <g.thomas@opengroup.org>.
    352. 

  352. 			  Fix srom_exec() to return for COMPACT and type 1
    353. 

  353. 			   infoblocks.
    354. 

  354. 			  Added DC21142 and DC21143 functions.
    355. 

  355. 			  Added byte counters from <phil@tazenda.demon.co.uk>
    356. 

  356. 			  Added IRQF_DISABLED temporary fix from
    357. 

  357. 			   <mjacob@feral.com>.
    358. 

  358.       0.53   12-Nov-97    Fix the *_probe() to include 'eth??' name during
    359. 

  359.                            module load: bug reported by
    360. 

  360. 			   <Piete.Brooks@cl.cam.ac.uk>
    361. 

  361. 			  Fix multi-MAC, one SROM, to work with 2114x chips:
    362. 

  362. 			   bug reported by <cmetz@inner.net>.
    363. 

  363. 			  Make above search independent of BIOS device scan
    364. 

  364. 			   direction.
    365. 

  365. 			  Completed DC2114[23] autosense functions.
    366. 

  366.       0.531  21-Dec-97    Fix DE500-XA 100Mb/s bug reported by
    367. 

  367.                            <robin@intercore.com
    368. 

  368. 			  Fix type1_infoblock() bug introduced in 0.53, from
    369. 

  369. 			   problem reports by
    370. 

  370. 			   <parmee@postecss.ncrfran.france.ncr.com> and
    371. 

  371. 			   <jo@ice.dillingen.baynet.de>.
    372. 

  372. 			  Added argument list to set up each board from either
    373. 

  373. 			   a module's command line or a compiled in #define.
    374. 

  374. 			  Added generic MII PHY functionality to deal with
    375. 

  375. 			   newer PHY chips.
    376. 

  376. 			  Fix the mess in 2.1.67.
    377. 

  377.       0.532   5-Jan-98    Fix bug in mii_get_phy() reported by
    378. 

  378.                            <redhat@cococo.net>.
    379. 

  379.                           Fix bug in pci_probe() for 64 bit systems reported
    380. 

  380. 			   by <belliott@accessone.com>.
    381. 

  381.       0.533   9-Jan-98    Fix more 64 bit bugs reported by <jal@cs.brown.edu>.
    382. 

  382.       0.534  24-Jan-98    Fix last (?) endian bug from <geert@linux-m68k.org>
    383. 

  383.       0.535  21-Feb-98    Fix Ethernet Address PROM reset bug for DC21040.
    384. 

  384.       0.536  21-Mar-98    Change pci_probe() to use the pci_dev structure.
    385. 

  385. 			  **Incompatible with 2.0.x from here.**
    386. 

  386.       0.540   5-Jul-98    Atomicize assertion of dev->interrupt for SMP
    387. 

  387.                            from <lma@varesearch.com>
    388. 

  388. 			  Add TP, AUI and BNC cases to 21140m_autoconf() for
    389. 

  389. 			   case where a 21140 under SROM control uses, e.g. AUI
    390. 

  390. 			   from problem report by <delchini@lpnp09.in2p3.fr>
    391. 

  391. 			  Add MII parallel detection to 2114x_autoconf() for
    392. 

  392. 			   case where no autonegotiation partner exists from
    393. 

  393. 			   problem report by <mlapsley@ndirect.co.uk>.
    394. 

  394. 			  Add ability to force connection type directly even
    395. 

  395. 			   when using SROM control from problem report by
    396. 

  396. 			   <earl@exis.net>.
    397. 

  397. 			  Updated the PCI interface to conform with the latest
    398. 

  398. 			   version. I hope nothing is broken...
    399. 

  399.           		  Add TX done interrupt modification from suggestion
    400. 

  400. 			   by <Austin.Donnelly@cl.cam.ac.uk>.
    401. 

  401. 			  Fix is_anc_capable() bug reported by
    402. 

  402. 			   <Austin.Donnelly@cl.cam.ac.uk>.
    403. 

  403. 			  Fix type[13]_infoblock() bug: during MII search, PHY
    404. 

  404. 			   lp->rst not run because lp->ibn not initialised -
    405. 

  405. 			   from report & fix by <paubert@iram.es>.
    406. 

  406. 			  Fix probe bug with EISA & PCI cards present from
    407. 

  407.                            report by <eirik@netcom.com>.
    408. 

  408.       0.541  24-Aug-98    Fix compiler problems associated with i386-string
    409. 

  409.                            ops from multiple bug reports and temporary fix
    410. 

  410. 			   from <paubert@iram.es>.
    411. 

  411. 			  Fix pci_probe() to correctly emulate the old
    412. 

  412. 			   pcibios_find_class() function.
    413. 

  413. 			  Add an_exception() for old ZYNX346 and fix compile
    414. 

  414. 			   warning on PPC & SPARC, from <ecd@skynet.be>.
    415. 

  415. 			  Fix lastPCI to correctly work with compiled in
    416. 

  416. 			   kernels and modules from bug report by
    417. 

  417. 			   <Zlatko.Calusic@CARNet.hr> et al.
    418. 

  418.       0.542  15-Sep-98    Fix dc2114x_autoconf() to stop multiple messages
    419. 

  419.                            when media is unconnected.
    420. 

  420. 			  Change dev->interrupt to lp->interrupt to ensure
    421. 

  421. 			   alignment for Alpha's and avoid their unaligned
    422. 

  422. 			   access traps. This flag is merely for log messages:
    423. 

  423. 			   should do something more definitive though...
    424. 

  424.       0.543  30-Dec-98    Add SMP spin locking.
    425. 

  425.       0.544   8-May-99    Fix for buggy SROM in Motorola embedded boards using
    426. 

  426.                            a 21143 by <mmporter@home.com>.
    427. 

  427. 			  Change PCI/EISA bus probing order.
    428. 

  428.       0.545  28-Nov-99    Further Moto SROM bug fix from
    429. 

  429.                            <mporter@eng.mcd.mot.com>
    430. 

  430.                           Remove double checking for DEBUG_RX in de4x5_dbg_rx()
    431. 

  431. 			   from report by <geert@linux-m68k.org>
    432. 

  432.       0.546  22-Feb-01    Fixes Alpha XP1000 oops.  The srom_search function
    433. 

  433.                            was causing a page fault when initializing the
    434. 

  434.                            variable 'pb', on a non de4x5 PCI device, in this
    435. 

  435.                            case a PCI bridge (DEC chip 21152). The value of
    436. 

  436.                            'pb' is now only initialized if a de4x5 chip is
    437. 

  437.                            present.
    438. 

  438.                            <france@handhelds.org>
    439. 

  439.       0.547  08-Nov-01    Use library crc32 functions by <Matt_Domsch@dell.com>
    440. 

  440.       0.548  30-Aug-03    Big 2.6 cleanup. Ported to PCI/EISA probing and
    441. 

  441.                            generic DMA APIs. Fixed DE425 support on Alpha.
    442. 

  442. 			   <maz@wild-wind.fr.eu.org>
    443. 

  443.     =========================================================================
    444. 

  444. */
    445. 

  445. 

  446. #include <linux/module.h>
    447. 

  447. #include <linux/kernel.h>
    448. 

  448. #include <linux/string.h>
    449. 

  449. #include <linux/interrupt.h>
    450. 

  450. #include <linux/ptrace.h>
    451. 

  451. #include <linux/errno.h>
    452. 

  452. #include <linux/ioport.h>
    453. 

  453. #include <linux/pci.h>
    454. 

  454. #include <linux/eisa.h>
    455. 

  455. #include <linux/delay.h>
    456. 

  456. #include <linux/init.h>
    457. 

  457. #include <linux/spinlock.h>
    458. 

  458. #include <linux/crc32.h>
    459. 

  459. #include <linux/netdevice.h>
    460. 

  460. #include <linux/etherdevice.h>
    461. 

  461. #include <linux/skbuff.h>
    462. 

  462. #include <linux/time.h>
    463. 

  463. #include <linux/types.h>
    464. 

  464. #include <linux/unistd.h>
    465. 

  465. #include <linux/ctype.h>
    466. 

  466. #include <linux/dma-mapping.h>
    467. 

  467. #include <linux/moduleparam.h>
    468. 

  468. #include <linux/bitops.h>
    469. 

  469. #include <linux/gfp.h>
    470. 

  470. 

  471. #include <asm/io.h>
    472. 

  472. #include <asm/dma.h>
    473. 

  473. #include <asm/byteorder.h>
    474. 

  474. #include <asm/unaligned.h>
    475. 

  475. #include <asm/uaccess.h>
    476. 

  476. #ifdef CONFIG_PPC_PMAC
    477. 

  477. #include <asm/machdep.h>
    478. 

  478. #endif /* CONFIG_PPC_PMAC */
    479. 

  479. 

  480. #include "de4x5.h"
    481. 

  481. 

  482. static const char version[] =
    483. 

  483. 	KERN_INFO "de4x5.c:V0.546 2001/02/22 davies@maniac.ultranet.com\n";
    484. 

  484. 

  485. #define c_char const char
    486. 

  486. 

  487. /*
    488. 

  488. ** MII Information
    489. 

  489. */
    490. 

  490. struct phy_table {
    491. 

  491.     int reset;              /* Hard reset required?                         */
    492. 

  492.     int id;                 /* IEEE OUI                                     */
    493. 

  493.     int ta;                 /* One cycle TA time - 802.3u is confusing here */
    494. 

  494.     struct {                /* Non autonegotiation (parallel) speed det.    */
    495. 

  495. 	int reg;
    496. 

  496. 	int mask;
    497. 

  497. 	int value;
    498. 

  498.     } spd;
    499. 

  499. };
    500. 

  500. 

  501. struct mii_phy {
    502. 

  502.     int reset;              /* Hard reset required?                      */
    503. 

  503.     int id;                 /* IEEE OUI                                  */
    504. 

  504.     int ta;                 /* One cycle TA time                         */
    505. 

  505.     struct {                /* Non autonegotiation (parallel) speed det. */
    506. 

  506. 	int reg;
    507. 

  507. 	int mask;
    508. 

  508. 	int value;
    509. 

  509.     } spd;
    510. 

  510.     int addr;               /* MII address for the PHY                   */
    511. 

  511.     u_char  *gep;           /* Start of GEP sequence block in SROM       */
    512. 

  512.     u_char  *rst;           /* Start of reset sequence in SROM           */
    513. 

  513.     u_int mc;               /* Media Capabilities                        */
    514. 

  514.     u_int ana;              /* NWay Advertisement                        */
    515. 

  515.     u_int fdx;              /* Full DupleX capabilities for each media   */
    516. 

  516.     u_int ttm;              /* Transmit Threshold Mode for each media    */
    517. 

  517.     u_int mci;              /* 21142 MII Connector Interrupt info        */
    518. 

  518. };
    519. 

  519. 

  520. #define DE4X5_MAX_PHY 8     /* Allow up to 8 attached PHY devices per board */
    521. 

  521. 

  522. struct sia_phy {
    523. 

  523.     u_char mc;              /* Media Code                                */
    524. 

  524.     u_char ext;             /* csr13-15 valid when set                   */
    525. 

  525.     int csr13;              /* SIA Connectivity Register                 */
    526. 

  526.     int csr14;              /* SIA TX/RX Register                        */
    527. 

  527.     int csr15;              /* SIA General Register                      */
    528. 

  528.     int gepc;               /* SIA GEP Control Information               */
    529. 

  529.     int gep;                /* SIA GEP Data                              */
    530. 

  530. };
    531. 

  531. 

  532. /*
    533. 

  533. ** Define the know universe of PHY devices that can be
    534. 

  534. ** recognised by this driver.
    535. 

  535. */
    536. 

  536. static struct phy_table phy_info[] = {
    537. 

  537.     {0, NATIONAL_TX, 1, {0x19, 0x40, 0x00}},       /* National TX      */
    538. 

  538.     {1, BROADCOM_T4, 1, {0x10, 0x02, 0x02}},       /* Broadcom T4      */
    539. 

  539.     {0, SEEQ_T4    , 1, {0x12, 0x10, 0x10}},       /* SEEQ T4          */
    540. 

  540.     {0, CYPRESS_T4 , 1, {0x05, 0x20, 0x20}},       /* Cypress T4       */
    541. 

  541.     {0, 0x7810     , 1, {0x14, 0x0800, 0x0800}}    /* Level One LTX970 */
    542. 

  542. };
    543. 

  543. 

  544. /*
    545. 

  545. ** These GENERIC values assumes that the PHY devices follow 802.3u and
    546. 

  546. ** allow parallel detection to set the link partner ability register.
    547. 

  547. ** Detection of 100Base-TX [H/F Duplex] and 100Base-T4 is supported.
    548. 

  548. */
    549. 

  549. #define GENERIC_REG   0x05      /* Autoneg. Link Partner Advertisement Reg. */
    550. 

  550. #define GENERIC_MASK  MII_ANLPA_100M /* All 100Mb/s Technologies            */
    551. 

  551. #define GENERIC_VALUE MII_ANLPA_100M /* 100B-TX, 100B-TX FDX, 100B-T4       */
    552. 

  552. 

  553. /*
    554. 

  554. ** Define special SROM detection cases
    555. 

  555. */
    556. 

  556. static c_char enet_det[][ETH_ALEN] = {
    557. 

  557.     {0x00, 0x00, 0xc0, 0x00, 0x00, 0x00},
    558. 

  558.     {0x00, 0x00, 0xe8, 0x00, 0x00, 0x00}
    559. 

  559. };
    560. 

  560. 

  561. #define SMC    1
    562. 

  562. #define ACCTON 2
    563. 

  563. 

  564. /*
    565. 

  565. ** SROM Repair definitions. If a broken SROM is detected a card may
    566. 

  566. ** use this information to help figure out what to do. This is a
    567. 

  567. ** "stab in the dark" and so far for SMC9332's only.
    568. 

  568. */
    569. 

  569. static c_char srom_repair_info[][100] = {
    570. 

  570.     {0x00,0x1e,0x00,0x00,0x00,0x08,             /* SMC9332 */
    571. 

  571.      0x1f,0x01,0x8f,0x01,0x00,0x01,0x00,0x02,
    572. 

  572.      0x01,0x00,0x00,0x78,0xe0,0x01,0x00,0x50,
    573. 

  573.      0x00,0x18,}
    574. 

  574. };
    575. 

  575. 

  576. 

  577. #ifdef DE4X5_DEBUG
    578. 

  578. static int de4x5_debug = DE4X5_DEBUG;
    579. 

  579. #else
    580. 

  580. /*static int de4x5_debug = (DEBUG_MII | DEBUG_SROM | DEBUG_PCICFG | DEBUG_MEDIA | DEBUG_VERSION);*/
    581. 

  581. static int de4x5_debug = (DEBUG_MEDIA | DEBUG_VERSION);
    582. 

  582. #endif
    583. 

  583. 

  584. /*
    585. 

  585. ** Allow per adapter set up. For modules this is simply a command line
    586. 

  586. ** parameter, e.g.:
    587. 

  587. ** insmod de4x5 args='eth1:fdx autosense=BNC eth0:autosense=100Mb'.
    588. 

  588. **
    589. 

  589. ** For a compiled in driver, place e.g.
    590. 

  590. **     #define DE4X5_PARM "eth0:fdx autosense=AUI eth2:autosense=TP"
    591. 

  591. ** here
    592. 

  592. */
    593. 

  593. #ifdef DE4X5_PARM
    594. 

  594. static char *args = DE4X5_PARM;
    595. 

  595. #else
    596. 

  596. static char *args;
    597. 

  597. #endif
    598. 

  598. 

  599. struct parameters {
    600. 

  600.     bool fdx;
    601. 

  601.     int autosense;
    602. 

  602. };
    603. 

  603. 

  604. #define DE4X5_AUTOSENSE_MS 250      /* msec autosense tick (DE500) */
    605. 

  605. 

  606. #define DE4X5_NDA 0xffe0            /* No Device (I/O) Address */
    607. 

  607. 

  608. /*
    609. 

  609. ** Ethernet PROM defines
    610. 

  610. */
    611. 

  611. #define PROBE_LENGTH    32
    612. 

  612. #define ETH_PROM_SIG    0xAA5500FFUL
    613. 

  613. 

  614. /*
    615. 

  615. ** Ethernet Info
    616. 

  616. */
    617. 

  617. #define PKT_BUF_SZ	1536            /* Buffer size for each Tx/Rx buffer */
    618. 

  618. #define IEEE802_3_SZ    1518            /* Packet + CRC */
    619. 

  619. #define MAX_PKT_SZ   	1514            /* Maximum ethernet packet length */
    620. 

  620. #define MAX_DAT_SZ   	1500            /* Maximum ethernet data length */
    621. 

  621. #define MIN_DAT_SZ   	1               /* Minimum ethernet data length */
    622. 

  622. #define PKT_HDR_LEN     14              /* Addresses and data length info */
    623. 

  623. #define FAKE_FRAME_LEN  (MAX_PKT_SZ + 1)
    624. 

  624. #define QUEUE_PKT_TIMEOUT (3*HZ)        /* 3 second timeout */
    625. 

  625. 

  626. 

  627. /*
    628. 

  628. ** EISA bus defines
    629. 

  629. */
    630. 

  630. #define DE4X5_EISA_IO_PORTS   0x0c00    /* I/O port base address, slot 0 */
    631. 

  631. #define DE4X5_EISA_TOTAL_SIZE 0x100     /* I/O address extent */
    632. 

  632. 

  633. #define EISA_ALLOWED_IRQ_LIST  {5, 9, 10, 11}
    634. 

  634. 

  635. #define DE4X5_SIGNATURE {"DE425","DE434","DE435","DE450","DE500"}
    636. 

  636. #define DE4X5_NAME_LENGTH 8
    637. 

  637. 

  638. static c_char *de4x5_signatures[] = DE4X5_SIGNATURE;
    639. 

  639. 

  640. /*
    641. 

  641. ** Ethernet PROM defines for DC21040
    642. 

  642. */
    643. 

  643. #define PROBE_LENGTH    32
    644. 

  644. #define ETH_PROM_SIG    0xAA5500FFUL
    645. 

  645. 

  646. /*
    647. 

  647. ** PCI Bus defines
    648. 

  648. */
    649. 

  649. #define PCI_MAX_BUS_NUM      8
    650. 

  650. #define DE4X5_PCI_TOTAL_SIZE 0x80       /* I/O address extent */
    651. 

  651. #define DE4X5_CLASS_CODE     0x00020000 /* Network controller, Ethernet */
    652. 

  652. 

  653. /*
    654. 

  654. ** Memory Alignment. Each descriptor is 4 longwords long. To force a
    655. 

  655. ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
    656. 

  656. ** DESC_ALIGN. ALIGN aligns the start address of the private memory area
    657. 

  657. ** and hence the RX descriptor ring's first entry.
    658. 

  658. */
    659. 

  659. #define DE4X5_ALIGN4      ((u_long)4 - 1)     /* 1 longword align */
    660. 

  660. #define DE4X5_ALIGN8      ((u_long)8 - 1)     /* 2 longword align */
    661. 

  661. #define DE4X5_ALIGN16     ((u_long)16 - 1)    /* 4 longword align */
    662. 

  662. #define DE4X5_ALIGN32     ((u_long)32 - 1)    /* 8 longword align */
    663. 

  663. #define DE4X5_ALIGN64     ((u_long)64 - 1)    /* 16 longword align */
    664. 

  664. #define DE4X5_ALIGN128    ((u_long)128 - 1)   /* 32 longword align */
    665. 

  665. 

  666. #define DE4X5_ALIGN         DE4X5_ALIGN32           /* Keep the DC21040 happy... */
    667. 

  667. #define DE4X5_CACHE_ALIGN   CAL_16LONG
    668. 

  668. #define DESC_SKIP_LEN DSL_0             /* Must agree with DESC_ALIGN */
    669. 

  669. /*#define DESC_ALIGN    u32 dummy[4];  / * Must agree with DESC_SKIP_LEN */
    670. 

  670. #define DESC_ALIGN
    671. 

  671. 

  672. #ifndef DEC_ONLY                        /* See README.de4x5 for using this */
    673. 

  673. static int dec_only;
    674. 

  674. #else
    675. 

  675. static int dec_only = 1;
    676. 

  676. #endif
    677. 

  677. 

  678. /*
    679. 

  679. ** DE4X5 IRQ ENABLE/DISABLE
    680. 

  680. */
    681. 

  681. #define ENABLE_IRQs { \
    682. 

  682.     imr |= lp->irq_en;\
    683. 

  683.     outl(imr, DE4X5_IMR);               /* Enable the IRQs */\
    684. 

  684. }
    685. 

  685. 

  686. #define DISABLE_IRQs {\
    687. 

  687.     imr = inl(DE4X5_IMR);\
    688. 

  688.     imr &= ~lp->irq_en;\
    689. 

  689.     outl(imr, DE4X5_IMR);               /* Disable the IRQs */\
    690. 

  690. }
    691. 

  691. 

  692. #define UNMASK_IRQs {\
    693. 

  693.     imr |= lp->irq_mask;\
    694. 

  694.     outl(imr, DE4X5_IMR);               /* Unmask the IRQs */\
    695. 

  695. }
    696. 

  696. 

  697. #define MASK_IRQs {\
    698. 

  698.     imr = inl(DE4X5_IMR);\
    699. 

  699.     imr &= ~lp->irq_mask;\
    700. 

  700.     outl(imr, DE4X5_IMR);               /* Mask the IRQs */\
    701. 

  701. }
    702. 

  702. 

  703. /*
    704. 

  704. ** DE4X5 START/STOP
    705. 

  705. */
    706. 

  706. #define START_DE4X5 {\
    707. 

  707.     omr = inl(DE4X5_OMR);\
    708. 

  708.     omr |= OMR_ST | OMR_SR;\
    709. 

  709.     outl(omr, DE4X5_OMR);               /* Enable the TX and/or RX */\
    710. 

  710. }
    711. 

  711. 

  712. #define STOP_DE4X5 {\
    713. 

  713.     omr = inl(DE4X5_OMR);\
    714. 

  714.     omr &= ~(OMR_ST|OMR_SR);\
    715. 

  715.     outl(omr, DE4X5_OMR);               /* Disable the TX and/or RX */ \
    716. 

  716. }
    717. 

  717. 

  718. /*
    719. 

  719. ** DE4X5 SIA RESET
    720. 

  720. */
    721. 

  721. #define RESET_SIA outl(0, DE4X5_SICR);  /* Reset SIA connectivity regs */
    722. 

  722. 

  723. /*
    724. 

  724. ** DE500 AUTOSENSE TIMER INTERVAL (MILLISECS)
    725. 

  725. */
    726. 

  726. #define DE4X5_AUTOSENSE_MS  250
    727. 

  727. 

  728. /*
    729. 

  729. ** SROM Structure
    730. 

  730. */
    731. 

  731. struct de4x5_srom {
    732. 

  732.     char sub_vendor_id[2];
    733. 

  733.     char sub_system_id[2];
    734. 

  734.     char reserved[12];
    735. 

  735.     char id_block_crc;
    736. 

  736.     char reserved2;
    737. 

  737.     char version;
    738. 

  738.     char num_controllers;
    739. 

  739.     char ieee_addr[6];
    740. 

  740.     char info[100];
    741. 

  741.     short chksum;
    742. 

  742. };
    743. 

  743. #define SUB_VENDOR_ID 0x500a
    744. 

  744. 

  745. /*
    746. 

  746. ** DE4X5 Descriptors. Make sure that all the RX buffers are contiguous
    747. 

  747. ** and have sizes of both a power of 2 and a multiple of 4.
    748. 

  748. ** A size of 256 bytes for each buffer could be chosen because over 90% of
    749. 

  749. ** all packets in our network are <256 bytes long and 64 longword alignment
    750. 

  750. ** is possible. 1536 showed better 'ttcp' performance. Take your pick. 32 TX
    751. 

  751. ** descriptors are needed for machines with an ALPHA CPU.
    752. 

  752. */
    753. 

  753. #define NUM_RX_DESC 8                   /* Number of RX descriptors   */
    754. 

  754. #define NUM_TX_DESC 32                  /* Number of TX descriptors   */
    755. 

  755. #define RX_BUFF_SZ  1536                /* Power of 2 for kmalloc and */
    756. 

  756.                                         /* Multiple of 4 for DC21040  */
    757. 

  757.                                         /* Allows 512 byte alignment  */
    758. 

  758. struct de4x5_desc {
    759. 

  759.     volatile __le32 status;
    760. 

  760.     __le32 des1;
    761. 

  761.     __le32 buf;
    762. 

  762.     __le32 next;
    763. 

  763.     DESC_ALIGN
    764. 

  764. };
    765. 

  765. 

  766. /*
    767. 

  767. ** The DE4X5 private structure
    768. 

  768. */
    769. 

  769. #define DE4X5_PKT_STAT_SZ 16
    770. 

  770. #define DE4X5_PKT_BIN_SZ  128            /* Should be >=100 unless you
    771. 

  771.                                             increase DE4X5_PKT_STAT_SZ */
    772. 

  772. 

  773. struct pkt_stats {
    774. 

  774. 	u_int bins[DE4X5_PKT_STAT_SZ];      /* Private stats counters       */
    775. 

  775. 	u_int unicast;
    776. 

  776. 	u_int multicast;
    777. 

  777. 	u_int broadcast;
    778. 

  778. 	u_int excessive_collisions;
    779. 

  779. 	u_int tx_underruns;
    780. 

  780. 	u_int excessive_underruns;
    781. 

  781. 	u_int rx_runt_frames;
    782. 

  782. 	u_int rx_collision;
    783. 

  783. 	u_int rx_dribble;
    784. 

  784. 	u_int rx_overflow;
    785. 

  785. };
    786. 

  786. 

  787. struct de4x5_private {
    788. 

  788.     char adapter_name[80];                  /* Adapter name                 */
    789. 

  789.     u_long interrupt;                       /* Aligned ISR flag             */
    790. 

  790.     struct de4x5_desc *rx_ring;		    /* RX descriptor ring           */
    791. 

  791.     struct de4x5_desc *tx_ring;		    /* TX descriptor ring           */
    792. 

  792.     struct sk_buff *tx_skb[NUM_TX_DESC];    /* TX skb for freeing when sent */
    793. 

  793.     struct sk_buff *rx_skb[NUM_RX_DESC];    /* RX skb's                     */
    794. 

  794.     int rx_new, rx_old;                     /* RX descriptor ring pointers  */
    795. 

  795.     int tx_new, tx_old;                     /* TX descriptor ring pointers  */
    796. 

  796.     char setup_frame[SETUP_FRAME_LEN];      /* Holds MCA and PA info.       */
    797. 

  797.     char frame[64];                         /* Min sized packet for loopback*/
    798. 

  798.     spinlock_t lock;                        /* Adapter specific spinlock    */
    799. 

  799.     struct net_device_stats stats;          /* Public stats                 */
    800. 

  800.     struct pkt_stats pktStats;	            /* Private stats counters	    */
    801. 

  801.     char rxRingSize;
    802. 

  802.     char txRingSize;
    803. 

  803.     int  bus;                               /* EISA or PCI                  */
    804. 

  804.     int  bus_num;                           /* PCI Bus number               */
    805. 

  805.     int  device;                            /* Device number on PCI bus     */
    806. 

  806.     int  state;                             /* Adapter OPENED or CLOSED     */
    807. 

  807.     int  chipset;                           /* DC21040, DC21041 or DC21140  */
    808. 

  808.     s32  irq_mask;                          /* Interrupt Mask (Enable) bits */
    809. 

  809.     s32  irq_en;                            /* Summary interrupt bits       */
    810. 

  810.     int  media;                             /* Media (eg TP), mode (eg 100B)*/
    811. 

  811.     int  c_media;                           /* Remember the last media conn */
    812. 

  812.     bool fdx;                               /* media full duplex flag       */
    813. 

  813.     int  linkOK;                            /* Link is OK                   */
    814. 

  814.     int  autosense;                         /* Allow/disallow autosensing   */
    815. 

  815.     bool tx_enable;                         /* Enable descriptor polling    */
    816. 

  816.     int  setup_f;                           /* Setup frame filtering type   */
    817. 

  817.     int  local_state;                       /* State within a 'media' state */
    818. 

  818.     struct mii_phy phy[DE4X5_MAX_PHY];      /* List of attached PHY devices */
    819. 

  819.     struct sia_phy sia;                     /* SIA PHY Information          */
    820. 

  820.     int  active;                            /* Index to active PHY device   */
    821. 

  821.     int  mii_cnt;                           /* Number of attached PHY's     */
    822. 

  822.     int  timeout;                           /* Scheduling counter           */
    823. 

  823.     struct timer_list timer;                /* Timer info for kernel        */
    824. 

  824.     int tmp;                                /* Temporary global per card    */
    825. 

  825.     struct {
    826. 

  826. 	u_long lock;                        /* Lock the cache accesses      */
    827. 

  827. 	s32 csr0;                           /* Saved Bus Mode Register      */
    828. 

  828. 	s32 csr6;                           /* Saved Operating Mode Reg.    */
    829. 

  829. 	s32 csr7;                           /* Saved IRQ Mask Register      */
    830. 

  830. 	s32 gep;                            /* Saved General Purpose Reg.   */
    831. 

  831. 	s32 gepc;                           /* Control info for GEP         */
    832. 

  832. 	s32 csr13;                          /* Saved SIA Connectivity Reg.  */
    833. 

  833. 	s32 csr14;                          /* Saved SIA TX/RX Register     */
    834. 

  834. 	s32 csr15;                          /* Saved SIA General Register   */
    835. 

  835. 	int save_cnt;                       /* Flag if state already saved  */
    836. 

  836. 	struct sk_buff_head queue;          /* Save the (re-ordered) skb's  */
    837. 

  837.     } cache;
    838. 

  838.     struct de4x5_srom srom;                 /* A copy of the SROM           */
    839. 

  839.     int cfrv;				    /* Card CFRV copy */
    840. 

  840.     int rx_ovf;                             /* Check for 'RX overflow' tag  */
    841. 

  841.     bool useSROM;                           /* For non-DEC card use SROM    */
    842. 

  842.     bool useMII;                            /* Infoblock using the MII      */
    843. 

  843.     int asBitValid;                         /* Autosense bits in GEP?       */
    844. 

  844.     int asPolarity;                         /* 0 => asserted high           */
    845. 

  845.     int asBit;                              /* Autosense bit number in GEP  */
    846. 

  846.     int defMedium;                          /* SROM default medium          */
    847. 

  847.     int tcount;                             /* Last infoblock number        */
    848. 

  848.     int infoblock_init;                     /* Initialised this infoblock?  */
    849. 

  849.     int infoleaf_offset;                    /* SROM infoleaf for controller */
    850. 

  850.     s32 infoblock_csr6;                     /* csr6 value in SROM infoblock */
    851. 

  851.     int infoblock_media;                    /* infoblock media              */
    852. 

  852.     int (*infoleaf_fn)(struct net_device *);    /* Pointer to infoleaf function */
    853. 

  853.     u_char *rst;                            /* Pointer to Type 5 reset info */
    854. 

  854.     u_char  ibn;                            /* Infoblock number             */
    855. 

  855.     struct parameters params;               /* Command line/ #defined params */
    856. 

  856.     struct device *gendev;	            /* Generic device */
    857. 

  857.     dma_addr_t dma_rings;		    /* DMA handle for rings	    */
    858. 

  858.     int dma_size;			    /* Size of the DMA area	    */
    859. 

  859.     char *rx_bufs;			    /* rx bufs on alpha, sparc, ... */
    860. 

  860. };
    861. 

  861. 

  862. /*
    863. 

  863. ** To get around certain poxy cards that don't provide an SROM
    864. 

  864. ** for the second and more DECchip, I have to key off the first
    865. 

  865. ** chip's address. I'll assume there's not a bad SROM iff:
    866. 

  866. **
    867. 

  867. **      o the chipset is the same
    868. 

  868. **      o the bus number is the same and > 0
    869. 

  869. **      o the sum of all the returned hw address bytes is 0 or 0x5fa
    870. 

  870. **
    871. 

  871. ** Also have to save the irq for those cards whose hardware designers
    872. 

  872. ** can't follow the PCI to PCI Bridge Architecture spec.
    873. 

  873. */
    874. 

  874. static struct {
    875. 

  875.     int chipset;
    876. 

  876.     int bus;
    877. 

  877.     int irq;
    878. 

  878.     u_char addr[ETH_ALEN];
    879. 

  879. } last = {0,};
    880. 

  880. 

  881. /*
    882. 

  882. ** The transmit ring full condition is described by the tx_old and tx_new
    883. 

  883. ** pointers by:
    884. 

  884. **    tx_old            = tx_new    Empty ring
    885. 

  885. **    tx_old            = tx_new+1  Full ring
    886. 

  886. **    tx_old+txRingSize = tx_new+1  Full ring  (wrapped condition)
    887. 

  887. */
    888. 

  888. #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
    889. 

  889. 			lp->tx_old+lp->txRingSize-lp->tx_new-1:\
    890. 

  890. 			lp->tx_old               -lp->tx_new-1)
    891. 

  891. 

  892. #define TX_PKT_PENDING (lp->tx_old != lp->tx_new)
    893. 

  893. 

  894. /*
    895. 

  895. ** Public Functions
    896. 

  896. */
    897. 

  897. static int     de4x5_open(struct net_device *dev);
    898. 

  898. static netdev_tx_t de4x5_queue_pkt(struct sk_buff *skb,
    899. 

  899. 					 struct net_device *dev);
    900. 

  900. static irqreturn_t de4x5_interrupt(int irq, void *dev_id);
    901. 

  901. static int     de4x5_close(struct net_device *dev);
    902. 

  902. static struct  net_device_stats *de4x5_get_stats(struct net_device *dev);
    903. 

  903. static void    de4x5_local_stats(struct net_device *dev, char *buf, int pkt_len);
    904. 

  904. static void    set_multicast_list(struct net_device *dev);
    905. 

  905. static int     de4x5_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
    906. 

  906. 

  907. /*
    908. 

  908. ** Private functions
    909. 

  909. */
    910. 

  910. static int     de4x5_hw_init(struct net_device *dev, u_long iobase, struct device *gendev);
    911. 

  911. static int     de4x5_init(struct net_device *dev);
    912. 

  912. static int     de4x5_sw_reset(struct net_device *dev);
    913. 

  913. static int     de4x5_rx(struct net_device *dev);
    914. 

  914. static int     de4x5_tx(struct net_device *dev);
    915. 

  915. static void    de4x5_ast(struct net_device *dev);
    916. 

  916. static int     de4x5_txur(struct net_device *dev);
    917. 

  917. static int     de4x5_rx_ovfc(struct net_device *dev);
    918. 

  918. 

  919. static int     autoconf_media(struct net_device *dev);
    920. 

  920. static void    create_packet(struct net_device *dev, char *frame, int len);
    921. 

  921. static void    load_packet(struct net_device *dev, char *buf, u32 flags, struct sk_buff *skb);
    922. 

  922. static int     dc21040_autoconf(struct net_device *dev);
    923. 

  923. static int     dc21041_autoconf(struct net_device *dev);
    924. 

  924. static int     dc21140m_autoconf(struct net_device *dev);
    925. 

  925. static int     dc2114x_autoconf(struct net_device *dev);
    926. 

  926. static int     srom_autoconf(struct net_device *dev);
    927. 

  927. static int     de4x5_suspect_state(struct net_device *dev, int timeout, int prev_state, int (*fn)(struct net_device *, int), int (*asfn)(struct net_device *));
    928. 

  928. static int     dc21040_state(struct net_device *dev, int csr13, int csr14, int csr15, int timeout, int next_state, int suspect_state, int (*fn)(struct net_device *, int));
    929. 

  929. static int     test_media(struct net_device *dev, s32 irqs, s32 irq_mask, s32 csr13, s32 csr14, s32 csr15, s32 msec);
    930. 

  930. static int     test_for_100Mb(struct net_device *dev, int msec);
    931. 

  931. static int     wait_for_link(struct net_device *dev);
    932. 

  932. static int     test_mii_reg(struct net_device *dev, int reg, int mask, bool pol, long msec);
    933. 

  933. static int     is_spd_100(struct net_device *dev);
    934. 

  934. static int     is_100_up(struct net_device *dev);
    935. 

  935. static int     is_10_up(struct net_device *dev);
    936. 

  936. static int     is_anc_capable(struct net_device *dev);
    937. 

  937. static int     ping_media(struct net_device *dev, int msec);
    938. 

  938. static struct sk_buff *de4x5_alloc_rx_buff(struct net_device *dev, int index, int len);
    939. 

  939. static void    de4x5_free_rx_buffs(struct net_device *dev);
    940. 

  940. static void    de4x5_free_tx_buffs(struct net_device *dev);
    941. 

  941. static void    de4x5_save_skbs(struct net_device *dev);
    942. 

  942. static void    de4x5_rst_desc_ring(struct net_device *dev);
    943. 

  943. static void    de4x5_cache_state(struct net_device *dev, int flag);
    944. 

  944. static void    de4x5_put_cache(struct net_device *dev, struct sk_buff *skb);
    945. 

  945. static void    de4x5_putb_cache(struct net_device *dev, struct sk_buff *skb);
    946. 

  946. static struct  sk_buff *de4x5_get_cache(struct net_device *dev);
    947. 

  947. static void    de4x5_setup_intr(struct net_device *dev);
    948. 

  948. static void    de4x5_init_connection(struct net_device *dev);
    949. 

  949. static int     de4x5_reset_phy(struct net_device *dev);
    950. 

  950. static void    reset_init_sia(struct net_device *dev, s32 sicr, s32 strr, s32 sigr);
    951. 

  951. static int     test_ans(struct net_device *dev, s32 irqs, s32 irq_mask, s32 msec);
    952. 

  952. static int     test_tp(struct net_device *dev, s32 msec);
    953. 

  953. static int     EISA_signature(char *name, struct device *device);
    954. 

  954. static int     PCI_signature(char *name, struct de4x5_private *lp);
    955. 

  955. static void    DevicePresent(struct net_device *dev, u_long iobase);
    956. 

  956. static void    enet_addr_rst(u_long aprom_addr);
    957. 

  957. static int     de4x5_bad_srom(struct de4x5_private *lp);
    958. 

  958. static short   srom_rd(u_long address, u_char offset);
    959. 

  959. static void    srom_latch(u_int command, u_long address);
    960. 

  960. static void    srom_command(u_int command, u_long address);
    961. 

  961. static void    srom_address(u_int command, u_long address, u_char offset);
    962. 

  962. static short   srom_data(u_int command, u_long address);
    963. 

  963. /*static void    srom_busy(u_int command, u_long address);*/
    964. 

  964. static void    sendto_srom(u_int command, u_long addr);
    965. 

  965. static int     getfrom_srom(u_long addr);
    966. 

  966. static int     srom_map_media(struct net_device *dev);
    967. 

  967. static int     srom_infoleaf_info(struct net_device *dev);
    968. 

  968. static void    srom_init(struct net_device *dev);
    969. 

  969. static void    srom_exec(struct net_device *dev, u_char *p);
    970. 

  970. static int     mii_rd(u_char phyreg, u_char phyaddr, u_long ioaddr);
    971. 

  971. static void    mii_wr(int data, u_char phyreg, u_char phyaddr, u_long ioaddr);
    972. 

  972. static int     mii_rdata(u_long ioaddr);
    973. 

  973. static void    mii_wdata(int data, int len, u_long ioaddr);
    974. 

  974. static void    mii_ta(u_long rw, u_long ioaddr);
    975. 

  975. static int     mii_swap(int data, int len);
    976. 

  976. static void    mii_address(u_char addr, u_long ioaddr);
    977. 

  977. static void    sendto_mii(u32 command, int data, u_long ioaddr);
    978. 

  978. static int     getfrom_mii(u32 command, u_long ioaddr);
    979. 

  979. static int     mii_get_oui(u_char phyaddr, u_long ioaddr);
    980. 

  980. static int     mii_get_phy(struct net_device *dev);
    981. 

  981. static void    SetMulticastFilter(struct net_device *dev);
    982. 

  982. static int     get_hw_addr(struct net_device *dev);
    983. 

  983. static void    srom_repair(struct net_device *dev, int card);
    984. 

  984. static int     test_bad_enet(struct net_device *dev, int status);
    985. 

  985. static int     an_exception(struct de4x5_private *lp);
    986. 

  986. static char    *build_setup_frame(struct net_device *dev, int mode);
    987. 

  987. static void    disable_ast(struct net_device *dev);
    988. 

  988. static long    de4x5_switch_mac_port(struct net_device *dev);
    989. 

  989. static int     gep_rd(struct net_device *dev);
    990. 

  990. static void    gep_wr(s32 data, struct net_device *dev);
    991. 

  991. static void    yawn(struct net_device *dev, int state);
    992. 

  992. static void    de4x5_parse_params(struct net_device *dev);
    993. 

  993. static void    de4x5_dbg_open(struct net_device *dev);
    994. 

  994. static void    de4x5_dbg_mii(struct net_device *dev, int k);
    995. 

  995. static void    de4x5_dbg_media(struct net_device *dev);
    996. 

  996. static void    de4x5_dbg_srom(struct de4x5_srom *p);
    997. 

  997. static void    de4x5_dbg_rx(struct sk_buff *skb, int len);
    998. 

  998. static int     dc21041_infoleaf(struct net_device *dev);
    999. 

  999. static int     dc21140_infoleaf(struct net_device *dev);
    1000. 

  1000. static int     dc21142_infoleaf(struct net_device *dev);
    1001. 

  1001. static int     dc21143_infoleaf(struct net_device *dev);
    1002. 

  1002. static int     type0_infoblock(struct net_device *dev, u_char count, u_char *p);
    1003. 

  1003. static int     type1_infoblock(struct net_device *dev, u_char count, u_char *p);
    1004. 

  1004. static int     type2_infoblock(struct net_device *dev, u_char count, u_char *p);
    1005. 

  1005. static int     type3_infoblock(struct net_device *dev, u_char count, u_char *p);
    1006. 

  1006. static int     type4_infoblock(struct net_device *dev, u_char count, u_char *p);
    1007. 

  1007. static int     type5_infoblock(struct net_device *dev, u_char count, u_char *p);
    1008. 

  1008. static int     compact_infoblock(struct net_device *dev, u_char count, u_char *p);
    1009. 

  1009. 

  1010. /*
    1011. 

  1011. ** Note now that module autoprobing is allowed under EISA and PCI. The
    1012. 

  1012. ** IRQ lines will not be auto-detected; instead I'll rely on the BIOSes
    1013. 

  1013. ** to "do the right thing".
    1014. 

  1014. */
    1015. 

  1015. 

  1016. static int io=0x0;/* EDIT THIS LINE FOR YOUR CONFIGURATION IF NEEDED        */
    1017. 

  1017. 

  1018. module_param(io, int, 0);
    1019. 

  1019. module_param(de4x5_debug, int, 0);
    1020. 

  1020. module_param(dec_only, int, 0);
    1021. 

  1021. module_param(args, charp, 0);
    1022. 

  1022. 

  1023. MODULE_PARM_DESC(io, "de4x5 I/O base address");
    1024. 

  1024. MODULE_PARM_DESC(de4x5_debug, "de4x5 debug mask");
    1025. 

  1025. MODULE_PARM_DESC(dec_only, "de4x5 probe only for Digital boards (0-1)");
    1026. 

  1026. MODULE_PARM_DESC(args, "de4x5 full duplex and media type settings; see de4x5.c for details");
    1027. 

  1027. MODULE_LICENSE("GPL");
    1028. 

  1028. 

  1029. /*
    1030. 

  1030. ** List the SROM infoleaf functions and chipsets
    1031. 

  1031. */
    1032. 

  1032. struct InfoLeaf {
    1033. 

  1033.     int chipset;
    1034. 

  1034.     int (*fn)(struct net_device *);
    1035. 

  1035. };
    1036. 

  1036. static struct InfoLeaf infoleaf_array[] = {
    1037. 

  1037.     {DC21041, dc21041_infoleaf},
    1038. 

  1038.     {DC21140, dc21140_infoleaf},
    1039. 

  1039.     {DC21142, dc21142_infoleaf},
    1040. 

  1040.     {DC21143, dc21143_infoleaf}
    1041. 

  1041. };
    1042. 

  1042. #define INFOLEAF_SIZE ARRAY_SIZE(infoleaf_array)
    1043. 

  1043. 

  1044. /*
    1045. 

  1045. ** List the SROM info block functions
    1046. 

  1046. */
    1047. 

  1047. static int (*dc_infoblock[])(struct net_device *dev, u_char, u_char *) = {
    1048. 

  1048.     type0_infoblock,
    1049. 

  1049.     type1_infoblock,
    1050. 

  1050.     type2_infoblock,
    1051. 

  1051.     type3_infoblock,
    1052. 

  1052.     type4_infoblock,
    1053. 

  1053.     type5_infoblock,
    1054. 

  1054.     compact_infoblock
    1055. 

  1055. };
    1056. 

  1056. 

  1057. #define COMPACT (ARRAY_SIZE(dc_infoblock) - 1)
    1058. 

  1058. 

  1059. /*
    1060. 

  1060. ** Miscellaneous defines...
    1061. 

  1061. */
    1062. 

  1062. #define RESET_DE4X5 {\
    1063. 

  1063.     int i;\
    1064. 

  1064.     i=inl(DE4X5_BMR);\
    1065. 

  1065.     mdelay(1);\
    1066. 

  1066.     outl(i | BMR_SWR, DE4X5_BMR);\
    1067. 

  1067.     mdelay(1);\
    1068. 

  1068.     outl(i, DE4X5_BMR);\
    1069. 

  1069.     mdelay(1);\
    1070. 

  1070.     for (i=0;i<5;i++) {inl(DE4X5_BMR); mdelay(1);}\
    1071. 

  1071.     mdelay(1);\
    1072. 

  1072. }
    1073. 

  1073. 

  1074. #define PHY_HARD_RESET {\
    1075. 

  1075.     outl(GEP_HRST, DE4X5_GEP);           /* Hard RESET the PHY dev. */\
    1076. 

  1076.     mdelay(1);                           /* Assert for 1ms */\
    1077. 

  1077.     outl(0x00, DE4X5_GEP);\
    1078. 

  1078.     mdelay(2);                           /* Wait for 2ms */\
    1079. 

  1079. }
    1080. 

  1080. 

  1081. static const struct net_device_ops de4x5_netdev_ops = {
    1082. 

  1082.     .ndo_open		= de4x5_open,
    1083. 

  1083.     .ndo_stop		= de4x5_close,
    1084. 

  1084.     .ndo_start_xmit	= de4x5_queue_pkt,
    1085. 

  1085.     .ndo_get_stats	= de4x5_get_stats,
    1086. 

  1086.     .ndo_set_rx_mode	= set_multicast_list,
    1087. 

  1087.     .ndo_do_ioctl	= de4x5_ioctl,
    1088. 

  1088.     .ndo_change_mtu	= eth_change_mtu,
    1089. 

  1089.     .ndo_set_mac_address= eth_mac_addr,
    1090. 

  1090.     .ndo_validate_addr	= eth_validate_addr,
    1091. 

  1091. };
    1092. 

  1092. 

  1093. 

  1094. static int
    1095. 

  1095. de4x5_hw_init(struct net_device *dev, u_long iobase, struct device *gendev)
    1096. 

  1096. {
    1097. 

  1097.     char name[DE4X5_NAME_LENGTH + 1];
    1098. 

  1098.     struct de4x5_private *lp = netdev_priv(dev);
    1099. 

  1099.     struct pci_dev *pdev = NULL;
    1100. 

  1100.     int i, status=0;
    1101. 

  1101. 

  1102.     dev_set_drvdata(gendev, dev);
    1103. 

  1103. 

  1104.     /* Ensure we're not sleeping */
    1105. 

  1105.     if (lp->bus == EISA) {
    1106. 

  1106. 	outb(WAKEUP, PCI_CFPM);
    1107. 

  1107.     } else {
    1108. 

  1108. 	pdev = to_pci_dev (gendev);
    1109. 

  1109. 	pci_write_config_byte(pdev, PCI_CFDA_PSM, WAKEUP);
    1110. 

  1110.     }
    1111. 

  1111.     mdelay(10);
    1112. 

  1112. 

  1113.     RESET_DE4X5;
    1114. 

  1114. 

  1115.     if ((inl(DE4X5_STS) & (STS_TS | STS_RS)) != 0) {
    1116. 

  1116. 	return -ENXIO;                       /* Hardware could not reset */
    1117. 

  1117.     }
    1118. 

  1118. 

  1119.     /*
    1120. 

  1120.     ** Now find out what kind of DC21040/DC21041/DC21140 board we have.
    1121. 

  1121.     */
    1122. 

  1122.     lp->useSROM = false;
    1123. 

  1123.     if (lp->bus == PCI) {
    1124. 

  1124. 	PCI_signature(name, lp);
    1125. 

  1125.     } else {
    1126. 

  1126. 	EISA_signature(name, gendev);
    1127. 

  1127.     }
    1128. 

  1128. 

  1129.     if (*name == '\0') {                     /* Not found a board signature */
    1130. 

  1130. 	return -ENXIO;
    1131. 

  1131.     }
    1132. 

  1132. 

  1133.     dev->base_addr = iobase;
    1134. 

  1134.     printk ("%s: %s at 0x%04lx", dev_name(gendev), name, iobase);
    1135. 

  1135. 

  1136.     status = get_hw_addr(dev);
    1137. 

  1137.     printk(", h/w address %pM\n", dev->dev_addr);
    1138. 

  1138. 

  1139.     if (status != 0) {
    1140. 

  1140. 	printk("      which has an Ethernet PRO
    1141.