Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
  2  *  driver for linux.
  3  */
  4 
  5 /*
  6         Written 1996 by Russell Nelson, with reference to skeleton.c
  7         written 1993-1994 by Donald Becker.
  8 
  9         This software may be used and distributed according to the terms
 10         of the GNU General Public License, incorporated herein by reference.
 11 
 12         The author may be reached at nelson@crynwr.com, Crynwr
 13         Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
 14 
 15   Changelog:
 16 
 17   Mike Cruse        : mcruse@cti-ltd.com
 18                     : Changes for Linux 2.0 compatibility. 
 19                     : Added dev_id parameter in net_interrupt(),
 20                     : request_irq() and free_irq(). Just NULL for now.
 21 
 22   Mike Cruse        : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
 23                     : in net_open() and net_close() so kerneld would know
 24                     : that the module is in use and wouldn't eject the 
 25                     : driver prematurely.
 26 
 27   Mike Cruse        : Rewrote init_module() and cleanup_module using 8390.c
 28                     : as an example. Disabled autoprobing in init_module(),
 29                     : not a good thing to do to other devices while Linux
 30                     : is running from all accounts.
 31 
 32   Russ Nelson       : Jul 13 1998.  Added RxOnly DMA support.
 33 
 34   Melody Lee        : Aug 10 1999.  Changes for Linux 2.2.5 compatibility. 
 35                     : email: ethernet@crystal.cirrus.com
 36 
 37   Alan Cox          : Removed 1.2 support, added 2.1 extra counters.
 38 
 39   Andrew Morton     : andrewm@uow.edu.au
 40                     : Kernel 2.3.48
 41                     : Handle kmalloc() failures
 42                     : Other resource allocation fixes
 43                     : Add SMP locks
 44                     : Integrate Russ Nelson's ALLOW_DMA functionality back in.
 45                     : If ALLOW_DMA is true, make DMA runtime selectable
 46                     : Folded in changes from Cirrus (Melody Lee
 47                     : <klee@crystal.cirrus.com>)
 48                     : Don't call netif_wake_queue() in net_send_packet()
 49                     : Fixed an out-of-mem bug in dma_rx()
 50                     : Updated Documentation/networking/cs89x0.txt
 51 
 52   Andrew Morton     : andrewm@uow.edu.au / Kernel 2.3.99-pre1
 53                     : Use skb_reserve to longword align IP header (two places)
 54                     : Remove a delay loop from dma_rx()
 55                     : Replace '100' with HZ
 56                     : Clean up a couple of skb API abuses
 57                     : Added 'cs89x0_dma=N' kernel boot option
 58                     : Correctly initialise lp->lock in non-module compile
 59 
 60   Andrew Morton     : andrewm@uow.edu.au / Kernel 2.3.99-pre4-1
 61                     : MOD_INC/DEC race fix (see
 62                     : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html)
 63 
 64   Andrew Morton     : andrewm@uow.edu.au / Kernel 2.4.0-test7-pre2
 65                     : Enhanced EEPROM support to cover more devices,
 66                     :   abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch
 67                     :   (Jason Gunthorpe <jgg@ualberta.ca>)
 68 
 69   Andrew Morton     : Kernel 2.4.0-test11-pre4
 70                     : Use dev->name in request_*() (Andrey Panin)
 71                     : Fix an error-path memleak in init_module()
 72                     : Preserve return value from request_irq()
 73                     : Fix type of `media' module parm (Keith Owens)
 74                     : Use SET_MODULE_OWNER()
 75                     : Tidied up strange request_irq() abuse in net_open().
 76 
 77   Andrew Morton     : Kernel 2.4.3-pre1
 78                     : Request correct number of pages for DMA (Hugh Dickens)
 79                     : Select PP_ChipID _after_ unregister_netdev in cleanup_module()
 80                     :  because unregister_netdev() calls get_stats.
 81                     : Make `version[]' __initdata
 82                     : Uninlined the read/write reg/word functions.
 83 
 84   Oskar Schirmer    : oskar@scara.com
 85                     : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=)
 86 
 87   Deepak Saxena     : dsaxena@plexity.net
 88                     : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support
 89 
 90 */
 91 
 92 /* Always include 'config.h' first in case the user wants to turn on
 93    or override something. */
 94 #include <linux/config.h>
 95 #include <linux/module.h>
 96 
 97 /*
 98  * Set this to zero to disable DMA code
 99  *
100  * Note that even if DMA is turned off we still support the 'dma' and  'use_dma'
101  * module options so we don't break any startup scripts.
102  */
103 #ifndef CONFIG_ARCH_IXDP2X01
104 #define ALLOW_DMA       0
105 #else
106 #define ALLOW_DMA       1
107 #endif
108 
109 /*
110  * Set this to zero to remove all the debug statements via
111  * dead code elimination
112  */
113 #define DEBUGGING       1
114 
115 /*
116   Sources:
117 
118         Crynwr packet driver epktisa.
119 
120         Crystal Semiconductor data sheets.
121 
122 */
123 
124 #include <linux/errno.h>
125 #include <linux/netdevice.h>
126 #include <linux/etherdevice.h>
127 #include <linux/kernel.h>
128 #include <linux/types.h>
129 #include <linux/fcntl.h>
130 #include <linux/interrupt.h>
131 #include <linux/ioport.h>
132 #include <linux/in.h>
133 #include <linux/skbuff.h>
134 #include <linux/slab.h>
135 #include <linux/spinlock.h>
136 #include <linux/string.h>
137 #include <linux/init.h>
138 #include <linux/bitops.h>
139 
140 #include <asm/system.h>
141 #include <asm/io.h>
142 #if ALLOW_DMA
143 #include <asm/dma.h>
144 #endif
145 
146 #include "cs89x0.h"
147 
148 static char version[] __initdata =
149 "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n";
150 
151 #define DRV_NAME "cs89x0"
152 
153 /* First, a few definitions that the brave might change.
154    A zero-terminated list of I/O addresses to be probed. Some special flags..
155       Addr & 1 = Read back the address port, look for signature and reset
156                  the page window before probing 
157       Addr & 3 = Reset the page window and probe 
158    The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
159    but it is possible that a Cirrus board could be plugged into the ISA
160    slots. */
161 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps 
162    them to system IRQ numbers. This mapping is card specific and is set to
163    the configuration of the Cirrus Eval board for this chip. */
164 #ifdef CONFIG_ARCH_CLPS7500
165 static unsigned int netcard_portlist[] __initdata =
166    { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
167 static unsigned int cs8900_irq_map[] = {12,0,0,0};
168 #elif defined(CONFIG_SH_HICOSH4)
169 static unsigned int netcard_portlist[] __initdata =
170    { 0x0300, 0};
171 static unsigned int cs8900_irq_map[] = {1,0,0,0};
172 #elif defined(CONFIG_ARCH_IXDP2X01)
173 #include <asm/irq.h>
174 static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
175 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
176 #else
177 static unsigned int netcard_portlist[] __initdata =
178    { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
179 static unsigned int cs8900_irq_map[] = {10,11,12,5};
180 #endif
181 
182 #if DEBUGGING
183 static unsigned int net_debug = DEBUGGING;
184 #else
185 #define net_debug 0     /* gcc will remove all the debug code for us */
186 #endif
187 
188 /* The number of low I/O ports used by the ethercard. */
189 #define NETCARD_IO_EXTENT       16
190 
191 /* we allow the user to override various values normally set in the EEPROM */
192 #define FORCE_RJ45      0x0001    /* pick one of these three */
193 #define FORCE_AUI       0x0002
194 #define FORCE_BNC       0x0004
195 
196 #define FORCE_AUTO      0x0010    /* pick one of these three */
197 #define FORCE_HALF      0x0020
198 #define FORCE_FULL      0x0030
199 
200 /* Information that need to be kept for each board. */
201 struct net_local {
202         struct net_device_stats stats;
203         int chip_type;          /* one of: CS8900, CS8920, CS8920M */
204         char chip_revision;     /* revision letter of the chip ('A'...) */
205         int send_cmd;           /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
206         int auto_neg_cnf;       /* auto-negotiation word from EEPROM */
207         int adapter_cnf;        /* adapter configuration from EEPROM */
208         int isa_config;         /* ISA configuration from EEPROM */
209         int irq_map;            /* IRQ map from EEPROM */
210         int rx_mode;            /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
211         int curr_rx_cfg;        /* a copy of PP_RxCFG */
212         int linectl;            /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
213         int send_underrun;      /* keep track of how many underruns in a row we get */
214         int force;              /* force various values; see FORCE* above. */
215         spinlock_t lock;
216 #if ALLOW_DMA
217         int use_dma;            /* Flag: we're using dma */
218         int dma;                /* DMA channel */
219         int dmasize;            /* 16 or 64 */
220         unsigned char *dma_buff;        /* points to the beginning of the buffer */
221         unsigned char *end_dma_buff;    /* points to the end of the buffer */
222         unsigned char *rx_dma_ptr;      /* points to the next packet  */
223 #endif
224 };
225 
226 /* Index to functions, as function prototypes. */
227 
228 static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
229 static int net_open(struct net_device *dev);
230 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
231 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
232 static void set_multicast_list(struct net_device *dev);
233 static void net_timeout(struct net_device *dev);
234 static void net_rx(struct net_device *dev);
235 static int net_close(struct net_device *dev);
236 static struct net_device_stats *net_get_stats(struct net_device *dev);
237 static void reset_chip(struct net_device *dev);
238 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
239 static int get_eeprom_cksum(int off, int len, int *buffer);
240 static int set_mac_address(struct net_device *dev, void *addr);
241 static void count_rx_errors(int status, struct net_local *lp);
242 #if ALLOW_DMA
243 static void get_dma_channel(struct net_device *dev);
244 static void release_dma_buff(struct net_local *lp);
245 #endif
246 
247 /* Example routines you must write ;->. */
248 #define tx_done(dev) 1
249 
250 /*
251  * Permit 'cs89x0_dma=N' in the kernel boot environment
252  */
253 #if !defined(MODULE) && (ALLOW_DMA != 0)
254 static int g_cs89x0_dma;
255 
256 static int __init dma_fn(char *str)
257 {
258         g_cs89x0_dma = simple_strtol(str,NULL,0);
259         return 1;
260 }
261 
262 __setup("cs89x0_dma=", dma_fn);
263 #endif  /* !defined(MODULE) && (ALLOW_DMA != 0) */
264 
265 #ifndef MODULE
266 static int g_cs89x0_media__force;
267 
268 static int __init media_fn(char *str)
269 {
270         if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
271         else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
272         else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
273         return 1;
274 }
275 
276 __setup("cs89x0_media=", media_fn);
277 
278 
279 /* Check for a network adaptor of this type, and return '' iff one exists.
280    If dev->base_addr == 0, probe all likely locations.
281    If dev->base_addr == 1, always return failure.
282    If dev->base_addr == 2, allocate space for the device and return success
283    (detachable devices only).
284    Return 0 on success.
285    */
286 
287 struct net_device * __init cs89x0_probe(int unit)
288 {
289         struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
290         unsigned *port;
291         int err = 0;
292         int irq;
293         int io;
294 
295         if (!dev)
296                 return ERR_PTR(-ENODEV);
297 
298         sprintf(dev->name, "eth%d", unit);
299         netdev_boot_setup_check(dev);
300         io = dev->base_addr;
301         irq = dev->irq;
302 
303         if (net_debug)
304                 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
305 
306         if (io > 0x1ff) {       /* Check a single specified location. */
307                 err = cs89x0_probe1(dev, io, 0);
308         } else if (io != 0) {   /* Don't probe at all. */
309                 err = -ENXIO;
310         } else {
311                 for (port = netcard_portlist; *port; port++) {
312                         if (cs89x0_probe1(dev, *port, 0) == 0)
313                                 break;
314                         dev->irq = irq;
315                 }
316                 if (!*port)
317                         err = -ENODEV;
318         }
319         if (err)
320                 goto out;
321         err = register_netdev(dev);
322         if (err)
323                 goto out1;
324         return dev;
325 out1:
326         outw(PP_ChipID, dev->base_addr + ADD_PORT);
327         release_region(dev->base_addr, NETCARD_IO_EXTENT);
328 out:
329         free_netdev(dev);
330         printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected.  Be sure to disable PnP with SETUP\n");
331         return ERR_PTR(err);
332 }
333 #endif
334 
335 static int
336 readreg(struct net_device *dev, int portno)
337 {
338         outw(portno, dev->base_addr + ADD_PORT);
339         return inw(dev->base_addr + DATA_PORT);
340 }
341 
342 static void
343 writereg(struct net_device *dev, int portno, int value)
344 {
345         outw(portno, dev->base_addr + ADD_PORT);
346         outw(value, dev->base_addr + DATA_PORT);
347 }
348 
349 static int
350 readword(struct net_device *dev, int portno)
351 {
352         return inw(dev->base_addr + portno);
353 }
354 
355 static void
356 writeword(struct net_device *dev, int portno, int value)
357 {
358         outw(value, dev->base_addr + portno);
359 }
360 
361 static int __init
362 wait_eeprom_ready(struct net_device *dev)
363 {
364         int timeout = jiffies;
365         /* check to see if the EEPROM is ready, a timeout is used -
366            just in case EEPROM is ready when SI_BUSY in the
367            PP_SelfST is clear */
368         while(readreg(dev, PP_SelfST) & SI_BUSY)
369                 if (jiffies - timeout >= 40)
370                         return -1;
371         return 0;
372 }
373 
374 static int __init
375 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
376 {
377         int i;
378 
379         if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
380         for (i = 0; i < len; i++) {
381                 if (wait_eeprom_ready(dev) < 0) return -1;
382                 /* Now send the EEPROM read command and EEPROM location to read */
383                 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
384                 if (wait_eeprom_ready(dev) < 0) return -1;
385                 buffer[i] = readreg(dev, PP_EEData);
386                 if (net_debug > 3) printk("%04x ", buffer[i]);
387         }
388         if (net_debug > 3) printk("\n");
389         return 0;
390 }
391 
392 static int  __init
393 get_eeprom_cksum(int off, int len, int *buffer)
394 {
395         int i, cksum;
396 
397         cksum = 0;
398         for (i = 0; i < len; i++)
399                 cksum += buffer[i];
400         cksum &= 0xffff;
401         if (cksum == 0)
402                 return 0;
403         return -1;
404 }
405 
406 /* This is the real probe routine.  Linux has a history of friendly device
407    probes on the ISA bus.  A good device probes avoids doing writes, and
408    verifies that the correct device exists and functions.
409    Return 0 on success.
410  */
411 
412 static int __init
413 cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
414 {
415         struct net_local *lp = netdev_priv(dev);
416         static unsigned version_printed;
417         int i;
418         unsigned rev_type = 0;
419         int eeprom_buff[CHKSUM_LEN];
420         int retval;
421 
422         SET_MODULE_OWNER(dev);
423         /* Initialize the device structure. */
424         if (!modular) {
425                 memset(lp, 0, sizeof(*lp));
426                 spin_lock_init(&lp->lock);
427 #ifndef MODULE
428 #if ALLOW_DMA
429                 if (g_cs89x0_dma) {
430                         lp->use_dma = 1;
431                         lp->dma = g_cs89x0_dma;
432                         lp->dmasize = 16;       /* Could make this an option... */
433                 }
434 #endif
435                 lp->force = g_cs89x0_media__force;
436 #endif
437         }
438 
439         /* Grab the region so we can find another board if autoIRQ fails. */
440         /* WTF is going on here? */
441         if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
442                 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
443                                 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
444                 retval = -EBUSY;
445                 goto out1;
446         }
447 
448 #ifdef CONFIG_SH_HICOSH4
449         /* truely reset the chip */
450         outw(0x0114, ioaddr + ADD_PORT);
451         outw(0x0040, ioaddr + DATA_PORT);
452 #endif
453 
454         /* if they give us an odd I/O address, then do ONE write to
455            the address port, to get it back to address zero, where we
456            expect to find the EISA signature word. An IO with a base of 0x3
457            will skip the test for the ADD_PORT. */
458         if (ioaddr & 1) {
459                 if (net_debug > 1)
460                         printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
461                 if ((ioaddr & 2) != 2)
462                         if ((inw((ioaddr & ~3)+ ADD_PORT) & ADD_MASK) != ADD_SIG) {
463                                 printk(KERN_ERR "%s: bad signature 0x%x\n",
464                                         dev->name, inw((ioaddr & ~3)+ ADD_PORT));
465                                 retval = -ENODEV;
466                                 goto out2;
467                         }
468         }
469 printk("PP_addr=0x%x\n", inw(ioaddr + ADD_PORT));
470 
471         ioaddr &= ~3;
472         outw(PP_ChipID, ioaddr + ADD_PORT);
473 
474         if (inw(ioaddr + DATA_PORT) != CHIP_EISA_ID_SIG) {
475                 printk(KERN_ERR "%s: incorrect signature 0x%x\n",
476                         dev->name, inw(ioaddr + DATA_PORT));
477                 retval = -ENODEV;
478                 goto out2;
479         }
480 
481         /* Fill in the 'dev' fields. */
482         dev->base_addr = ioaddr;
483 
484         /* get the chip type */
485         rev_type = readreg(dev, PRODUCT_ID_ADD);
486         lp->chip_type = rev_type &~ REVISON_BITS;
487         lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
488 
489         /* Check the chip type and revision in order to set the correct send command
490         CS8920 revision C and CS8900 revision F can use the faster send. */
491         lp->send_cmd = TX_AFTER_381;
492         if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
493                 lp->send_cmd = TX_NOW;
494         if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
495                 lp->send_cmd = TX_NOW;
496 
497         if (net_debug  &&  version_printed++ == 0)
498                 printk(version);
499 
500         printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
501                dev->name,
502                lp->chip_type==CS8900?'':'2',
503                lp->chip_type==CS8920M?"M":"",
504                lp->chip_revision,
505                dev->base_addr);
506 
507         reset_chip(dev);
508    
509         /* Here we read the current configuration of the chip. If there
510            is no Extended EEPROM then the idea is to not disturb the chip
511            configuration, it should have been correctly setup by automatic
512            EEPROM read on reset. So, if the chip says it read the EEPROM
513            the driver will always do *something* instead of complain that
514            adapter_cnf is 0. */
515 
516 #ifdef CONFIG_SH_HICOSH4
517         if (1) {
518                 /* For the HiCO.SH4 board, things are different: we don't
519                    have EEPROM, but there is some data in flash, so we go
520                    get it there directly (MAC). */
521                 __u16 *confd;
522                 short cnt;
523                 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
524                         == 0x006c3000) {
525                         confd = (__u16*) 0xa0013fc0;
526                 } else {
527                         confd = (__u16*) 0xa001ffc0;
528                 }
529                 cnt = (*confd++ & 0x00ff) >> 1;
530                 while (--cnt > 0) {
531                         __u16 j = *confd++;
532                         
533                         switch (j & 0x0fff) {
534                         case PP_IA:
535                                 for (i = 0; i < ETH_ALEN/2; i++) {
536                                         dev->dev_addr[i*2] = confd[i] & 0xFF;
537                                         dev->dev_addr[i*2+1] = confd[i] >> 8;
538                                 }
539                                 break;
540                         }
541                         j = (j >> 12) + 1;
542                         confd += j;
543                         cnt -= j;
544                 }
545         } else
546 #endif
547 
548         if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) == 
549               (EEPROM_OK|EEPROM_PRESENT)) {
550                 /* Load the MAC. */
551                 for (i=0; i < ETH_ALEN/2; i++) {
552                         unsigned int Addr;
553                         Addr = readreg(dev, PP_IA+i*2);
554                         dev->dev_addr[i*2] = Addr & 0xFF;
555                         dev->dev_addr[i*2+1] = Addr >> 8;
556                 }
557    
558                 /* Load the Adapter Configuration. 
559                    Note:  Barring any more specific information from some 
560                    other source (ie EEPROM+Schematics), we would not know 
561                    how to operate a 10Base2 interface on the AUI port. 
562                    However, since we  do read the status of HCB1 and use 
563                    settings that always result in calls to control_dc_dc(dev,0) 
564                    a BNC interface should work if the enable pin 
565                    (dc/dc converter) is on HCB1. It will be called AUI 
566                    however. */
567            
568                 lp->adapter_cnf = 0;
569                 i = readreg(dev, PP_LineCTL);
570                 /* Preserve the setting of the HCB1 pin. */
571                 if ((i & (HCB1 | HCB1_ENBL)) ==  (HCB1 | HCB1_ENBL))
572                         lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
573                 /* Save the sqelch bit */
574                 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
575                         lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
576                 /* Check if the card is in 10Base-t only mode */
577                 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
578                         lp->adapter_cnf |=  A_CNF_10B_T | A_CNF_MEDIA_10B_T;
579                 /* Check if the card is in AUI only mode */
580                 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
581                         lp->adapter_cnf |=  A_CNF_AUI | A_CNF_MEDIA_AUI;
582                 /* Check if the card is in Auto mode. */
583                 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
584                         lp->adapter_cnf |=  A_CNF_AUI | A_CNF_10B_T | 
585                         A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
586                 
587                 if (net_debug > 1)
588                         printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
589                                         dev->name, i, lp->adapter_cnf);
590 
591                 /* IRQ. Other chips already probe, see below. */
592                 if (lp->chip_type == CS8900) 
593                         lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
594            
595                 printk( "[Cirrus EEPROM] ");
596         }
597 
598         printk("\n");
599    
600         /* First check to see if an EEPROM is attached. */
601 #ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
602         if (1) {
603                 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
604         } else
605 #endif
606         if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
607                 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
608         else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
609                 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
610         } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
611                 /* Check if the chip was able to read its own configuration starting
612                    at 0 in the EEPROM*/
613                 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
614                     (EEPROM_OK|EEPROM_PRESENT)) 
615                         printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
616                    
617         } else {
618                 /* This reads an extended EEPROM that is not documented
619                    in the CS8900 datasheet. */
620                 
621                 /* get transmission control word  but keep the autonegotiation bits */
622                 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
623                 /* Store adapter configuration */
624                 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
625                 /* Store ISA configuration */
626                 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
627                 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
628 
629                 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
630                 /* store the initial memory base address */
631                 for (i = 0; i < ETH_ALEN/2; i++) {
632                         dev->dev_addr[i*2] = eeprom_buff[i];
633                         dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
634                 }
635                 if (net_debug > 1)
636                         printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
637                                 dev->name, lp->adapter_cnf);
638         }
639 
640         /* allow them to force multiple transceivers.  If they force multiple, autosense */
641         {
642                 int count = 0;
643                 if (lp->force & FORCE_RJ45)     {lp->adapter_cnf |= A_CNF_10B_T; count++; }
644                 if (lp->force & FORCE_AUI)      {lp->adapter_cnf |= A_CNF_AUI; count++; }
645                 if (lp->force & FORCE_BNC)      {lp->adapter_cnf |= A_CNF_10B_2; count++; }
646                 if (count > 1)                  {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
647                 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
648                 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
649                 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
650         }
651 
652         if (net_debug > 1)
653                 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
654                         dev->name, lp->force, lp->adapter_cnf);
655 
656         /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
657 
658         /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
659 
660         /* FIXME: we don't set the Ethernet address on the command line.  Use
661            ifconfig IFACE hw ether AABBCCDDEEFF */
662 
663         printk(KERN_INFO "cs89x0 media %s%s%s",
664                (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
665                (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
666                (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
667 
668         lp->irq_map = 0xffff;
669 
670         /* If this is a CS8900 then no pnp soft */
671         if (lp->chip_type != CS8900 &&
672             /* Check if the ISA IRQ has been set  */
673                 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
674                  (i != 0 && i < CS8920_NO_INTS))) {
675                 if (!dev->irq)
676                         dev->irq = i;
677         } else {
678                 i = lp->isa_config & INT_NO_MASK;
679                 if (lp->chip_type == CS8900) {
680 #ifdef CONFIG_ARCH_IXDP2X01
681                         i = cs8900_irq_map[0];
682 #else
683                         /* Translate the IRQ using the IRQ mapping table. */
684                         if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
685                                 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
686                         else
687                                 i = cs8900_irq_map[i];
688                         
689                         lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
690                 } else {
691                         int irq_map_buff[IRQ_MAP_LEN/2];
692 
693                         if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
694                                             IRQ_MAP_LEN/2,
695                                             irq_map_buff) >= 0) {
696                                 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
697                                         lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
698                         }
699 #endif
700                 }
701                 if (!dev->irq)
702                         dev->irq = i;
703         }
704 
705         printk(" IRQ %d", dev->irq);
706 
707 #if ALLOW_DMA
708         if (lp->use_dma) {
709                 get_dma_channel(dev);
710                 printk(", DMA %d", dev->dma);
711         }
712         else
713 #endif
714         {
715                 printk(", programmed I/O");
716         }
717 
718         /* print the ethernet address. */
719         printk(", MAC");
720         for (i = 0; i < ETH_ALEN; i++)
721         {
722                 printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
723         }
724 
725         dev->open               = net_open;
726         dev->stop               = net_close;
727         dev->tx_timeout         = net_timeout;
728         dev->watchdog_timeo     = HZ;
729         dev->hard_start_xmit    = net_send_packet;
730         dev->get_stats          = net_get_stats;
731         dev->set_multicast_list = set_multicast_list;
732         dev->set_mac_address    = set_mac_address;
733 
734         printk("\n");
735         if (net_debug)
736                 printk("cs89x0_probe1() successful\n");
737         return 0;
738 out2:
739         release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
740 out1:
741         return retval;
742 }
743 
744 
745 /*********************************
746  * This page contains DMA routines
747 **********************************/
748 
749 #if ALLOW_DMA
750 
751 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
752 
753 static void
754 get_dma_channel(struct net_device *dev)
755 {
756         struct net_local *lp = netdev_priv(dev);
757 
758         if (lp->dma) {
759                 dev->dma = lp->dma;
760                 lp->isa_config |= ISA_RxDMA;
761         } else {
762                 if ((lp->isa_config & ANY_ISA_DMA) == 0)
763                         return;
764                 dev->dma = lp->isa_config & DMA_NO_MASK;
765                 if (lp->chip_type == CS8900)
766                         dev->dma += 5;
767                 if (dev->dma < 5 || dev->dma > 7) {
768                         lp->isa_config &= ~ANY_ISA_DMA;
769                         return;
770                 }
771         }
772         return;
773 }
774 
775 static void
776 write_dma(struct net_device *dev, int chip_type, int dma)
777 {
778         struct net_local *lp = netdev_priv(dev);
779         if ((lp->isa_config & ANY_ISA_DMA) == 0)
780                 return;
781         if (chip_type == CS8900) {
782                 writereg(dev, PP_CS8900_ISADMA, dma-5);
783         } else {
784                 writereg(dev, PP_CS8920_ISADMA, dma);
785         }
786 }
787 
788 static void
789 set_dma_cfg(struct net_device *dev)
790 {
791         struct net_local *lp = netdev_priv(dev);
792 
793         if (lp->use_dma) {
794                 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
795                         if (net_debug > 3)
796                                 printk("set_dma_cfg(): no DMA\n");
797                         return;
798                 }
799                 if (lp->isa_config & ISA_RxDMA) {
800                         lp->curr_rx_cfg |= RX_DMA_ONLY;
801                         if (net_debug > 3)
802                                 printk("set_dma_cfg(): RX_DMA_ONLY\n");
803                 } else {
804                         lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
805                         if (net_debug > 3)
806                                 printk("set_dma_cfg(): AUTO_RX_DMA\n");
807                 }
808         }
809 }
810 
811 static int
812 dma_bufcfg(struct net_device *dev)
813 {
814         struct net_local *lp = netdev_priv(dev);
815         if (lp->use_dma)
816                 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
817         else
818                 return 0;
819 }
820 
821 static int
822 dma_busctl(struct net_device *dev)
823 {
824         int retval = 0;
825         struct net_local *lp = netdev_priv(dev);
826         if (lp->use_dma) {
827                 if (lp->isa_config & ANY_ISA_DMA)
828                         retval |= RESET_RX_DMA; /* Reset the DMA pointer */
829                 if (lp->isa_config & DMA_BURST)
830                         retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
831                 if (lp->dmasize == 64)
832                         retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
833                 retval |= MEMORY_ON;    /* we need memory enabled to use DMA. */
834         }
835         return retval;
836 }
837 
838 static void
839 dma_rx(struct net_device *dev)
840 {
841         struct net_local *lp = netdev_priv(dev);
842         struct sk_buff *skb;
843         int status, length;
844         unsigned char *bp = lp->rx_dma_ptr;
845 
846         status = bp[0] + (bp[1]<<8);
847         length = bp[2] + (bp[3]<<8);
848         bp += 4;
849         if (net_debug > 5) {
850                 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
851                         dev->name, (unsigned long)bp, status, length);
852         }
853         if ((status & RX_OK) == 0) {
854                 count_rx_errors(status, lp);
855                 goto skip_this_frame;
856         }
857 
858         /* Malloc up new buffer. */
859         skb = dev_alloc_skb(length + 2);
860         if (skb == NULL) {
861                 if (net_debug)  /* I don't think we want to do this to a stressed system */
862                         printk("%s: Memory squeeze, dropping packet.\n", dev->name);
863                 lp->stats.rx_dropped++;
864 
865                 /* AKPM: advance bp to the next frame */
866 skip_this_frame:
867                 bp += (length + 3) & ~3;
868                 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
869                 lp->rx_dma_ptr = bp;
870                 return;
871         }
872         skb_reserve(skb, 2);    /* longword align L3 header */
873         skb->dev = dev;
874 
875         if (bp + length > lp->end_dma_buff) {
876                 int semi_cnt = lp->end_dma_buff - bp;
877                 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
878                 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
879                        length - semi_cnt);
880         } else {
881                 memcpy(skb_put(skb,length), bp, length);
882         }
883         bp += (length + 3) & ~3;
884         if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
885         lp->rx_dma_ptr = bp;
886 
887         if (net_debug > 3) {
888                 printk( "%s: received %d byte DMA packet of type %x\n",
889                         dev->name, length,
890                         (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
891         }
892         skb->protocol=eth_type_trans(skb,dev);
893         netif_rx(skb);
894         dev->last_rx = jiffies;
895         lp->stats.rx_packets++;
896         lp->stats.rx_bytes += length;
897 }
898 
899 #endif  /* ALLOW_DMA */
900 
901 void  __init reset_chip(struct net_device *dev)
902 {
903 #ifndef CONFIG_ARCH_IXDP2X01
904         struct net_local *lp = netdev_priv(dev);
905         int ioaddr = dev->base_addr;
906 #endif
907         int reset_start_time;
908 
909         writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
910 
911         /* wait 30 ms */
912         current->state = TASK_INTERRUPTIBLE;
913         schedule_timeout(30*HZ/1000);
914 
915 #ifndef CONFIG_ARCH_IXDP2X01
916         if (lp->chip_type != CS8900) {
917                 /* Hardware problem requires PNP registers to be reconfigured after a reset */
918                 outw(PP_CS8920_ISAINT, ioaddr + ADD_PORT);
919                 outb(dev->irq, ioaddr + DATA_PORT);
920                 outb(0,      ioaddr + DATA_PORT + 1);
921 
922                 outw(PP_CS8920_ISAMemB, ioaddr + ADD_PORT);
923                 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
924                 outb((dev->mem_start >> 8) & 0xff,   ioaddr + DATA_PORT + 1);
925         }
926 #endif  /* IXDP2x01 */
927 
928         /* Wait until the chip is reset */
929         reset_start_time = jiffies;
930         while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
931                 ;
932 }
933 
934 
935 static void
936 control_dc_dc(struct net_device *dev, int on_not_off)
937 {
938         struct net_local *lp = netdev_priv(dev);
939         unsigned int selfcontrol;
940         int timenow = jiffies;
941         /* control the DC to DC convertor in the SelfControl register.  
942            Note: This is hooked up to a general purpose pin, might not
943            always be a DC to DC convertor. */
944 
945         selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
946         if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
947                 selfcontrol |= HCB1;
948         else
949                 selfcontrol &= ~HCB1;
950         writereg(dev, PP_SelfCTL, selfcontrol);
951 
952         /* Wait for the DC/DC converter to power up - 500ms */
953         while (jiffies - timenow < HZ)
954                 ;
955 }
956 
957 #define DETECTED_NONE  0
958 #define DETECTED_RJ45H 1
959 #define DETECTED_RJ45F 2
960 #define DETECTED_AUI   3
961 #define DETECTED_BNC   4
962 
963 static int
964 detect_tp(struct net_device *dev)
965 {
966         struct net_local *lp = netdev_priv(dev);
967         int timenow = jiffies;
968         int fdx;
969 
970         if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
971 
972         /* If connected to another full duplex capable 10-Base-T card the link pulses
973            seem to be lost when the auto detect bit in the LineCTL is set.
974            To overcome this the auto detect bit will be cleared whilst testing the
975            10-Base-T interface.  This would not be necessary for the sparrow chip but
976            is simpler to do it anyway. */
977         writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
978         control_dc_dc(dev, 0);
979 
980         /* Delay for the hardware to work out if the TP cable is present - 150ms */
981         for (timenow = jiffies; jiffies - timenow < 15; )
982                 ;
983         if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
984                 return DETECTED_NONE;
985 
986         if (lp->chip_type == CS8900) {
987                 switch (lp->force & 0xf0) {
988 #if 0
989                 case FORCE_AUTO:
990                         printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
991                         return DETECTED_NONE;
992 #endif
993                 /* CS8900 doesn't support AUTO, change to HALF*/
994                 case FORCE_AUTO:
995                         lp->force &= ~FORCE_AUTO;
996                         lp->force |= FORCE_HALF;
997                         break;
998                 case FORCE_HALF:
999                         break;
1000                 case FORCE_FULL:
1001                         writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1002                         break;
1003                 }
1004                 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1005         } else {
1006                 switch (lp->force & 0xf0) {
1007                 case FORCE_AUTO:
1008                         lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1009                         break;
1010                 case FORCE_HALF:
1011                         lp->auto_neg_cnf = 0;
1012                         break;
1013                 case FORCE_FULL:
1014                         lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1015                         break;
1016                 }
1017 
1018                 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1019 
1020                 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1021                         printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1022                         while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1023                                 if (jiffies - timenow > 4000) {
1024                                         printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1025                                         break;
1026                                 }
1027                         }
1028                 }
1029                 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1030         }
1031         if (fdx)
1032                 return DETECTED_RJ45F;
1033         else
1034                 return DETECTED_RJ45H;
1035 }
1036 
1037 /* send a test packet - return true if carrier bits are ok */
1038 static int
1039 send_test_pkt(struct net_device *dev)
1040 {
1041         char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1042                                  0, 46, /* A 46 in network order */
1043                                  0, 0, /* DSAP=0 & SSAP=0 fields */
1044                                  0xf3, 0 /* Control (Test Req + P bit set) */ };
1045         long timenow = jiffies;
1046 
1047         writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1048 
1049         memcpy(test_packet,          dev->dev_addr, ETH_ALEN);
1050         memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1051 
1052         writeword(dev, TX_CMD_PORT, TX_AFTER_ALL);
1053         writeword(dev, TX_LEN_PORT, ETH_ZLEN);
1054 
1055         /* Test to see if the chip has allocated memory for the packet */
1056         while (jiffies - timenow < 5)
1057                 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1058                         break;
1059         if (jiffies - timenow >= 5)
1060                 return 0;       /* this shouldn't happen */
1061 
1062         /* Write the contents of the packet */
1063         outsw(dev->base_addr + TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1064 
1065         if (net_debug > 1) printk("Sending test packet ");
1066         /* wait a couple of jiffies for packet to be received */
1067         for (timenow = jiffies; jiffies - timenow < 3; )
1068                 ;
1069         if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1070                 if (net_debug > 1) printk("succeeded\n");
1071                 return 1;
1072         }
1073         if (net_debug > 1) printk("failed\n");
1074         return 0;
1075 }
1076 
1077 
1078 static int
1079 detect_aui(struct net_device *dev)
1080 {
1081         struct net_local *lp = netdev_priv(dev);
1082 
1083         if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1084         control_dc_dc(dev, 0);
1085 
1086         writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1087 
1088         if (send_test_pkt(dev))
1089                 return DETECTED_AUI;
1090         else
1091                 return DETECTED_NONE;
1092 }
1093 
1094 static int
1095 detect_bnc(struct net_device *dev)
1096 {
1097         struct net_local *lp = netdev_priv(dev);
1098 
1099         if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1100         control_dc_dc(dev, 1);
1101 
1102         writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1103 
1104         if (send_test_pkt(dev))
1105                 return DETECTED_BNC;
1106         else
1107                 return DETECTED_NONE;
1108 }
1109 
1110 
1111 static void
1112 write_irq(struct net_device *dev, int chip_type, int irq)
1113 {
1114         int i;
1115 
1116         if (chip_type == CS8900) {
1117                 /* Search the mapping table for the corresponding IRQ pin. */
1118                 for (i = 0; i != sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]); i++)
1119                         if (cs8900_irq_map[i] == irq)
1120                                 break;
1121                 /* Not found */
1122                 if (i == sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
1123                         i = 3;
1124                 writereg(dev, PP_CS8900_ISAINT, i);
1125         } else {
1126                 writereg(dev, PP_CS8920_ISAINT, irq);
1127         }
1128 }
1129 
1130 /* Open/initialize the board.  This is called (in the current kernel)
1131    sometime after booting when the 'ifconfig' program is run.
1132 
1133    This routine should set everything up anew at each open, even
1134    registers that "should" only need to be set once at boot, so that
1135    there is non-reboot way to recover if something goes wrong.
1136    */
1137 
1138 /* AKPM: do we need to do any locking here? */
1139 
1140 static int
1141 net_open(struct net_device *dev)
1142 {
1143         struct net_local *lp = netdev_priv(dev);
1144         int result = 0;
1145         int i;
1146         int ret;
1147 
1148 #ifndef CONFIG_SH_HICOSH4 /* uses irq#1, so this won't work */
1149         if (dev->irq < 2) {
1150                 /* Allow interrupts to be generated by the chip */
1151 /* Cirrus' release had this: */
1152 #if 0
1153                 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1154 #endif
1155 /* And 2.3.47 had this: */
1156                 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1157 
1158                 for (i = 2; i < CS8920_NO_INTS; i++) {
1159                         if ((1 << i) & lp->irq_map) {
1160                                 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1161                                         dev->irq = i;
1162                                         write_irq(dev, lp->chip_type, i);
1163                                         /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1164                                         break;
1165                                 }
1166                         }
1167                 }
1168 
1169                 if (i >= CS8920_NO_INTS) {
1170                         writereg(dev, PP_BusCTL, 0);    /* disable interrupts. */
1171                         printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1172                         ret = -EAGAIN;
1173                         goto bad_out;
1174                 }
1175         }
1176         else
1177 #endif
1178         {
1179 #ifndef CONFIG_ARCH_IXDP2X01
1180                 if (((1 << dev->irq) & lp->irq_map) == 0) {
1181                         printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1182                                dev->name, dev->irq, lp->irq_map);
1183                         ret = -EAGAIN;
1184                         goto bad_out;
1185                 }
1186 #endif
1187 /* FIXME: Cirrus' release had this: */
1188                 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1189 /* And 2.3.47 had this: */
1190 #if 0
1191                 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1192 #endif
1193                 write_irq(dev, lp->chip_type, dev->irq);
1194                 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1195                 if (ret) {
1196                         if (net_debug)
1197                                 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1198                         goto bad_out;
1199                 }
1200         }
1201 
1202 #if ALLOW_DMA
1203         if (lp->use_dma) {
1204                 if (lp->isa_config & ANY_ISA_DMA) {
1205                         unsigned long flags;
1206                         lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1207                                                         get_order(lp->dmasize * 1024));
1208 
1209                         if (!lp->dma_buff) {
1210                                 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1211                                 goto release_irq;
1212                         }
1213                         if (net_debug > 1) {
1214                                 printk( "%s: dma %lx %lx\n",
1215                                         dev->name,
1216                                         (unsigned long)lp->dma_buff,
1217                                         (unsigned long)isa_virt_to_bus(lp->dma_buff));
1218                         }
1219                         if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1220                             !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1221                                 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1222                                 goto release_irq;
1223                         }
1224                         memset(lp->dma_buff, 0, lp->dmasize * 1024);    /* Why? */
1225                         if (request_dma(dev->dma, dev->name)) {
1226                                 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1227                                 goto release_irq;
1228                         }
1229                         write_dma(dev, lp->chip_type, dev->dma);
1230                         lp->rx_dma_ptr = lp->dma_buff;
1231                         lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1232                         spin_lock_irqsave(&lp->lock, flags);
1233                         disable_dma(dev->dma);
1234                         clear_dma_ff(dev->dma);
1235                         set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1236                         set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1237                         set_dma_count(dev->dma, lp->dmasize*1024);
1238                         enable_dma(dev->dma);
1239                         spin_unlock_irqrestore(&lp->lock, flags);
1240                 }
1241         }
1242 #endif  /* ALLOW_DMA */
1243 
1244         /* set the Ethernet address */
1245         for (i=0; i < ETH_ALEN/2; i++)
1246                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1247 
1248         /* while we're testing the interface, leave interrupts disabled */
1249         writereg(dev, PP_BusCTL, MEMORY_ON);
1250 
1251         /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1252         if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1253                 lp->linectl = LOW_RX_SQUELCH;
1254         else
1255                 lp->linectl = 0;
1256 
1257         /* check to make sure that they have the "right" hardware available */
1258         switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1259         case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1260         case A_CNF_MEDIA_AUI:   result = lp->adapter_cnf & A_CNF_AUI; break;
1261         case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1262         default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1263         }
1264         if (!result) {
1265                 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1266         release_irq:
1267 #if ALLOW_DMA
1268                 release_dma_buff(lp);
1269 #endif
1270                 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1271                 free_irq(dev->irq, dev);
1272                 ret = -EAGAIN;
1273                 goto bad_out;
1274         }
1275 
1276         /* set the hardware to the configured choice */
1277         switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1278         case A_CNF_MEDIA_10B_T:
1279                 result = detect_tp(dev);
1280                 if (result==DETECTED_NONE) {
1281                         printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1282                         if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1283                                 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1284                 }
1285                 break;
1286         case A_CNF_MEDIA_AUI:
1287                 result = detect_aui(dev);
1288                 if (result==DETECTED_NONE) {
1289                         printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1290                         if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1291                                 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1292                 }
1293                 break;
1294         case A_CNF_MEDIA_10B_2:
1295                 result = detect_bnc(dev);
1296                 if (result==DETECTED_NONE) {
1297                         printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1298                         if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1299                                 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1300                 }
1301                 break;
1302         case A_CNF_MEDIA_AUTO:
1303                 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1304                 if (lp->adapter_cnf & A_CNF_10B_T)
1305                         if ((result = detect_tp(dev)) != DETECTED_NONE)
1306                                 break;
1307                 if (lp->adapter_cnf & A_CNF_AUI)
1308                         if ((result = detect_aui(dev)) != DETECTED_NONE)
1309                                 break;
1310                 if (lp->adapter_cnf & A_CNF_10B_2)
1311                         if ((result = detect_bnc(dev)) != DETECTED_NONE)
1312                                 break;
1313                 printk(KERN_ERR "%s: no media detected\n", dev->name);
1314                 goto release_irq;
1315         }
1316         switch(result) {
1317         case DETECTED_NONE:
1318                 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1319                 goto release_irq;
1320         case DETECTED_RJ45H:
1321                 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1322                 break;
1323         case DETECTED_RJ45F:
1324                 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1325                 break;
1326         case DETECTED_AUI:
1327                 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1328                 break;
1329         case DETECTED_BNC:
1330                 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1331                 break;
1332         }
1333 
1334         /* Turn on both receive and transmit operations */
1335         writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1336 
1337         /* Receive only error free packets addressed to this card */
1338         lp->rx_mode = 0;
1339         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1340 
1341         lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1342 
1343         if (lp->isa_config & STREAM_TRANSFER)
1344                 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1345 #if ALLOW_DMA
1346         set_dma_cfg(dev);
1347 #endif
1348         writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1349 
1350         writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1351                 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1352 
1353         writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1354 #if ALLOW_DMA
1355                 dma_bufcfg(dev) |
1356 #endif
1357                 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1358 
1359         /* now that we've got our act together, enable everything */
1360         writereg(dev, PP_BusCTL, ENABLE_IRQ
1361                  | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1362 #if ALLOW_DMA
1363                  | dma_busctl(dev)
1364 #endif
1365                  );
1366         netif_start_queue(dev);
1367         if (net_debug > 1)
1368                 printk("cs89x0: net_open() succeeded\n");
1369         return 0;
1370 bad_out:
1371         return ret;
1372 }
1373 
1374 static void net_timeout(struct net_device *dev)
1375 {
1376         /* If we get here, some higher level has decided we are broken.
1377            There should really be a "kick me" function call instead. */
1378         if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1379                    tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1380         /* Try to restart the adaptor. */
1381         netif_wake_queue(dev);
1382 }
1383 
1384 static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1385 {
1386         struct net_local *lp = netdev_priv(dev);
1387 
1388         if (net_debug > 3) {
1389                 printk("%s: sent %d byte packet of type %x\n",
1390                         dev->name, skb->len,
1391                         (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1392         }
1393 
1394         /* keep the upload from being interrupted, since we
1395                   ask the chip to start transmitting before the
1396                   whole packet has been completely uploaded. */
1397 
1398         spin_lock_irq(&lp->lock);
1399         netif_stop_queue(dev);
1400 
1401         /* initiate a transmit sequence */
1402         writeword(dev, TX_CMD_PORT, lp->send_cmd);
1403         writeword(dev, TX_LEN_PORT, skb->len);
1404 
1405         /* Test to see if the chip has allocated memory for the packet */
1406         if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1407                 /*
1408                  * Gasp!  It hasn't.  But that shouldn't happen since
1409                  * we're waiting for TxOk, so return 1 and requeue this packet.
1410                  */
1411                 
1412                 spin_unlock_irq(&lp->lock);
1413                 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1414                 return 1;
1415         }
1416         /* Write the contents of the packet */
1417         outsw(dev->base_addr + TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1418         spin_unlock_irq(&lp->lock);
1419         dev->trans_start = jiffies;
1420         dev_kfree_skb (skb);
1421 
1422         /*
1423          * We DO NOT call netif_wake_queue() here.
1424          * We also DO NOT call netif_start_queue().
1425          *
1426          * Either of these would cause another bottom half run through
1427          * net_send_packet() before this packet has fully gone out.  That causes
1428          * us to hit the "Gasp!" above and the send is rescheduled.  it runs like
1429          * a dog.  We just return and wait for the Tx completion interrupt handler
1430          * to restart the netdevice layer
1431          */
1432 
1433         return 0;
1434 }
1435 
1436 /* The typical workload of the driver:
1437    Handle the network interface interrupts. */
1438    
1439 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1440 {
1441         struct net_device *dev = dev_id;
1442         struct net_local *lp;
1443         int ioaddr, status;
1444         int handled = 0;
1445 
1446         ioaddr = dev->base_addr;
1447         lp = netdev_priv(dev);
1448 
1449         /* we MUST read all the events out of the ISQ, otherwise we'll never
1450            get interrupted again.  As a consequence, we can't have any limit
1451            on the number of times we loop in the interrupt handler.  The
1452            hardware guarantees that eventually we'll run out of events.  Of
1453            course, if you're on a slow machine, and packets are arriving
1454            faster than you can read them off, you're screwed.  Hasta la
1455            vista, baby!  */
1456         while ((status = readword(dev, ISQ_PORT))) {
1457                 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1458                 handled = 1;
1459                 switch(status & ISQ_EVENT_MASK) {
1460                 case ISQ_RECEIVER_EVENT:
1461                         /* Got a packet(s). */
1462                         net_rx(dev);
1463                         break;
1464                 case ISQ_TRANSMITTER_EVENT:
1465                         lp->stats.tx_packets++;
1466                         netif_wake_queue(dev);  /* Inform upper layers. */
1467                         if ((status & ( TX_OK |
1468                                         TX_LOST_CRS |
1469                                         TX_SQE_ERROR |
1470                                         TX_LATE_COL |
1471                                         TX_16_COL)) != TX_OK) {
1472                                 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1473                                 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1474                                 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1475                                 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1476                                 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1477                         }
1478                         break;
1479                 case ISQ_BUFFER_EVENT:
1480                         if (status & READY_FOR_TX) {
1481                                 /* we tried to transmit a packet earlier,
1482                                    but inexplicably ran out of buffers.
1483                                    That shouldn't happen since we only ever
1484                                    load one packet.  Shrug.  Do the right
1485                                    thing anyway. */
1486                                 netif_wake_queue(dev);  /* Inform upper layers. */
1487                         }
1488                         if (status & TX_UNDERRUN) {
1489                                 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1490                                 lp->send_underrun++;
1491                                 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1492                                 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1493                                 /* transmit cycle is done, although
1494                                    frame wasn't transmitted - this
1495                                    avoids having to wait for the upper
1496                                    layers to timeout on us, in the
1497                                    event of a tx underrun */
1498                                 netif_wake_queue(dev);  /* Inform upper layers. */
1499                         }
1500 #if ALLOW_DMA
1501                         if (lp->use_dma && (status & RX_DMA)) {
1502                                 int count = readreg(dev, PP_DmaFrameCnt);
1503                                 while(count) {
1504                                         if (net_debug > 5)
1505                                                 printk("%s: receiving %d DMA frames\n", dev->name, count);
1506                                         if (net_debug > 2 && count >1)
1507                                                 printk("%s: receiving %d DMA frames\n", dev->name, count);
1508                                         dma_rx(dev);
1509                                         if (--count == 0)
1510                                                 count = readreg(dev, PP_DmaFrameCnt);
1511                                         if (net_debug > 2 && count > 0)
1512                                                 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1513                                 }
1514                         }
1515 #endif
1516                         break;
1517                 case ISQ_RX_MISS_EVENT:
1518                         lp->stats.rx_missed_errors += (status >>6);
1519                         break;
1520                 case ISQ_TX_COL_EVENT:
1521                         lp->stats.collisions += (status >>6);
1522                         break;
1523                 }
1524         }
1525         return IRQ_RETVAL(handled);
1526 }
1527 
1528 static void
1529 count_rx_errors(int status, struct net_local *lp)
1530 {
1531         lp->stats.rx_errors++;
1532         if (status & RX_RUNT) lp->stats.rx_length_errors++;
1533         if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1534         if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1535                 /* per str 172 */
1536                 lp->stats.rx_crc_errors++;
1537         if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1538         return;
1539 }
1540 
1541 /* We have a good packet(s), get it/them out of the buffers. */
1542 static void
1543 net_rx(struct net_device *dev)
1544 {
1545         struct net_local *lp = netdev_priv(dev);
1546         struct sk_buff *skb;
1547         int status, length;
1548 
1549         int ioaddr = dev->base_addr;
1550         status = inw(ioaddr + RX_FRAME_PORT);
1551         length = inw(ioaddr + RX_FRAME_PORT);
1552 
1553         if ((status & RX_OK) == 0) {
1554                 count_rx_errors(status, lp);
1555                 return;
1556         }
1557 
1558         /* Malloc up new buffer. */
1559         skb = dev_alloc_skb(length + 2);
1560         if (skb == NULL) {
1561 #if 0           /* Again, this seems a cruel thing to do */
1562                 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1563 #endif
1564                 lp->stats.rx_dropped++;
1565                 return;
1566         }
1567         skb_reserve(skb, 2);    /* longword align L3 header */
1568         skb->dev = dev;
1569 
1570         insw(ioaddr + RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1571         if (length & 1)
1572                 skb->data[length-1] = inw(ioaddr + RX_FRAME_PORT);
1573 
1574         if (net_debug > 3) {
1575                 printk( "%s: received %d byte packet of type %x\n",
1576                         dev->name, length,
1577                         (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1578         }
1579 
1580         skb->protocol=eth_type_trans(skb,dev);
1581         netif_rx(skb);
1582         dev->last_rx = jiffies;
1583         lp->stats.rx_packets++;
1584         lp->stats.rx_bytes += length;
1585 }
1586 
1587 #if ALLOW_DMA
1588 static void release_dma_buff(struct net_local *lp)
1589 {
1590         if (lp->dma_buff) {
1591                 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1592                 lp->dma_buff = NULL;
1593         }
1594 }
1595 #endif
1596 
1597 /* The inverse routine to net_open(). */
1598 static int
1599 net_close(struct net_device *dev)
1600 {
1601 #if ALLOW_DMA
1602         struct net_local *lp = netdev_priv(dev);
1603 #endif
1604 
1605         netif_stop_queue(dev);
1606         
1607         writereg(dev, PP_RxCFG, 0);
1608         writereg(dev, PP_TxCFG, 0);
1609         writereg(dev, PP_BufCFG, 0);
1610         writereg(dev, PP_BusCTL, 0);
1611 
1612         free_irq(dev->irq, dev);
1613 
1614 #if ALLOW_DMA
1615         if (lp->use_dma && lp->dma) {
1616                 free_dma(dev->dma);
1617                 release_dma_buff(lp);
1618         }
1619 #endif
1620 
1621         /* Update the statistics here. */
1622         return 0;
1623 }
1624 
1625 /* Get the current statistics.  This may be called with the card open or
1626    closed. */
1627 static struct net_device_stats *
1628 net_get_stats(struct net_device *dev)
1629 {
1630         struct net_local *lp = netdev_priv(dev);
1631         unsigned long flags;
1632 
1633         spin_lock_irqsave(&lp->lock, flags);
1634         /* Update the statistics from the device registers. */
1635         lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1636         lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1637         spin_unlock_irqrestore(&lp->lock, flags);
1638 
1639         return &lp->stats;
1640 }
1641 
1642 static void set_multicast_list(struct net_device *dev)
1643 {
1644         struct net_local *lp = netdev_priv(dev);
1645         unsigned long flags;
1646 
1647         spin_lock_irqsave(&lp->lock, flags);
1648         if(dev->flags&IFF_PROMISC)
1649         {
1650                 lp->rx_mode = RX_ALL_ACCEPT;
1651         }
1652         else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1653         {
1654                 /* The multicast-accept list is initialized to accept-all, and we
1655                    rely on higher-level filtering for now. */
1656                 lp->rx_mode = RX_MULTCAST_ACCEPT;
1657         } 
1658         else
1659                 lp->rx_mode = 0;
1660 
1661         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1662 
1663         /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1664         writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1665              (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1666         spin_unlock_irqrestore(&lp->lock, flags);
1667 }
1668 
1669 
1670 static int set_mac_address(struct net_device *dev, void *p)
1671 {
1672         int i;
1673         struct sockaddr *addr = p;
1674 
1675 
1676         if (netif_running(dev))
1677                 return -EBUSY;
1678 
1679         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1680 
1681         if (net_debug) {
1682                 printk("%s: Setting MAC address to ", dev->name);
1683                 for (i = 0; i < dev->addr_len; i++)
1684                         printk(" %2.2x", dev->dev_addr[i]);
1685                 printk(".\n");
1686         }
1687         /* set the Ethernet address */
1688         for (i=0; i < ETH_ALEN/2; i++)
1689                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1690 
1691         return 0;
1692 }
1693 
1694 #ifdef MODULE
1695 
1696 static struct net_device *dev_cs89x0;
1697 
1698 /*
1699  * Support the 'debug' module parm even if we're compiled for non-debug to 
1700  * avoid breaking someone's startup scripts 
1701  */
1702 
1703 static int io;
1704 static int irq;
1705 static int debug;
1706 static char media[8];
1707 static int duplex=-1;
1708 
1709 static int use_dma;                     /* These generate unused var warnings if ALLOW_DMA = 0 */
1710 static int dma;
1711 static int dmasize=16;                  /* or 64 */
1712 
1713 module_param(io, int, 0);
1714 module_param(irq, int, 0);
1715 module_param(debug, int, 0);
1716 module_param_string(media, media, sizeof(media), 0);
1717 module_param(duplex, int, 0);
1718 module_param(dma , int, 0);
1719 module_param(dmasize , int, 0);
1720 module_param(use_dma , int, 0);
1721 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1722 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1723 #if DEBUGGING
1724 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1725 #else
1726 MODULE_PARM_DESC(debug, "(ignored)");
1727 #endif
1728 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1729 /* No other value than -1 for duplex seems to be currently interpreted */
1730 MODULE_PARM_DESC(duplex, "(ignored)");
1731 #if ALLOW_DMA
1732 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1733 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1734 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1735 #else
1736 MODULE_PARM_DESC(dma , "(ignored)");
1737 MODULE_PARM_DESC(dmasize , "(ignored)");
1738 MODULE_PARM_DESC(use_dma , "(ignored)");
1739 #endif
1740 
1741 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>");
1742 MODULE_LICENSE("GPL");
1743 
1744 
1745 /*
1746 * media=t             - specify media type
1747    or media=2
1748    or media=aui
1749    or medai=auto
1750 * duplex=0            - specify forced half/full/autonegotiate duplex
1751 * debug=#             - debug level
1752 
1753 
1754 * Default Chip Configuration:
1755   * DMA Burst = enabled
1756   * IOCHRDY Enabled = enabled
1757     * UseSA = enabled
1758     * CS8900 defaults to half-duplex if not specified on command-line
1759     * CS8920 defaults to autoneg if not specified on command-line
1760     * Use reset defaults for other config parameters
1761 
1762 * Assumptions:
1763   * media type specified is supported (circuitry is present)
1764   * if memory address is > 1MB, then required mem decode hw is present
1765   * if 10B-2, then agent other than driver will enable DC/DC converter
1766     (hw or software util)
1767 
1768 
1769 */
1770 
1771 int
1772 init_module(void)
1773 {
1774         struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1775         struct net_local *lp;
1776         int ret = 0;
1777 
1778 #if DEBUGGING
1779         net_debug = debug;
1780 #else
1781         debug = 0;
1782 #endif
1783         if (!dev)
1784                 return -ENOMEM;
1785 
1786         dev->irq = irq;
1787         dev->base_addr = io;
1788         lp = netdev_priv(dev);
1789 
1790 #if ALLOW_DMA
1791         if (use_dma) {
1792                 lp->use_dma = use_dma;
1793                 lp->dma = dma;
1794                 lp->dmasize = dmasize;
1795         }
1796 #endif
1797 
1798         spin_lock_init(&lp->lock);
1799 
1800         /* boy, they'd better get these right */
1801         if (!strcmp(media, "rj45"))
1802                 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1803         else if (!strcmp(media, "aui"))
1804                 lp->adapter_cnf = A_CNF_MEDIA_AUI   | A_CNF_AUI;
1805         else if (!strcmp(media, "bnc"))
1806                 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1807         else
1808                 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1809 
1810         if (duplex==-1)
1811                 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1812 
1813         if (io == 0) {
1814                 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1815                 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1816                 ret = -EPERM;
1817                 goto out;
1818         } else if (io <= 0x1ff) {
1819                 ret = -ENXIO;
1820                 goto out;
1821         }
1822 
1823 #if ALLOW_DMA
1824         if (use_dma && dmasize != 16 && dmasize != 64) {
1825                 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1826                 ret = -EPERM;
1827                 goto out;
1828         }
1829 #endif
1830         ret = cs89x0_probe1(dev, io, 1);
1831         if (ret)
1832                 goto out;
1833 
1834         if (register_netdev(dev) != 0) {
1835                 printk(KERN_ERR "cs89x0.c: No card found at 0x%x\n", io);
1836                 ret = -ENXIO;
1837                 outw(PP_ChipID, dev->base_addr + ADD_PORT);
1838                 release_region(dev->base_addr, NETCARD_IO_EXTENT);
1839                 goto out;
1840         }
1841         dev_cs89x0 = dev;
1842         return 0;
1843 out:
1844         free_netdev(dev);
1845         return ret;
1846 }
1847 
1848 void
1849 cleanup_module(void)
1850 {
1851         unregister_netdev(dev_cs89x0);
1852         outw(PP_ChipID, dev_cs89x0->base_addr + ADD_PORT);
1853         release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1854         free_netdev(dev_cs89x0);
1855 }
1856 #endif /* MODULE */
1857 
1858 /*
1859  * Local variables:
1860  *  version-control: t
1861  *  kept-new-versions: 5
1862  *  c-indent-level: 8
1863  *  tab-width: 8
1864  * End:
1865  *
1866  */
1867 
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