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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / net / depca.c
blob5d62a032b8c876af6b046f09037e061b31c68b30
1 /* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
2
3 Written 1994, 1995 by David C. Davies.
4
5
6 Copyright 1994 David C. Davies
7 and
8 United States Government
9 (as represented by the Director, National Security Agency).
10
11 Copyright 1995 Digital Equipment Corporation.
12
13
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
16
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
19
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
28
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
31
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
36
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
39
40 The author may be reached at davies@maniac.ultranet.com
41
42 =========================================================================
43
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
48
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
64
65
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
68
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
79
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
84
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
97
98 ************************************************************************
99
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
107
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
110
111 ************************************************************************
112
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
117
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
121
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
124
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
140 7) enjoy!
141
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
144
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
147
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
151 option will not work with kernel built-in depca's.
152
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
156
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
160 fully stress-tested).
161
162 Currently known bugs/limitations:
163
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
169
170 ************************************************************************
171 TO DO:
172 ------
173
174
175 Revision History
176 ----------------
177
178 Version Date Description
179
180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
201 0.385 3-apr-95 Fix a recognition bug reported by
202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
211 Both above from a suggestion by
212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
221 by <tymm@computer.org>
222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
234
235 =========================================================================
236 */
237
238 #include <linux/config.h>
239 #include <linux/module.h>
240 #include <linux/kernel.h>
241 #include <linux/string.h>
242 #include <linux/errno.h>
243 #include <linux/ioport.h>
244 #include <linux/slab.h>
245 #include <linux/interrupt.h>
246 #include <linux/delay.h>
247 #include <linux/init.h>
248 #include <linux/crc32.h>
249 #include <linux/netdevice.h>
250 #include <linux/etherdevice.h>
251 #include <linux/skbuff.h>
252 #include <linux/time.h>
253 #include <linux/types.h>
254 #include <linux/unistd.h>
255 #include <linux/ctype.h>
256 #include <linux/moduleparam.h>
257 #include <linux/device.h>
258
259 #include <asm/uaccess.h>
260 #include <asm/bitops.h>
261 #include <asm/io.h>
262 #include <asm/dma.h>
263
264 #ifdef CONFIG_MCA
265 #include <linux/mca.h>
266 #endif
267
268 #ifdef CONFIG_EISA
269 #include <linux/eisa.h>
270 #endif
271
272 #include "depca.h"
273
274 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
275
276 #ifdef DEPCA_DEBUG
277 static int depca_debug = DEPCA_DEBUG;
278 #else
279 static int depca_debug = 1;
280 #endif
281
282 #define DEPCA_NDA 0xffe0 /* No Device Address */
283
284 #define TX_TIMEOUT (1*HZ)
285
286 /*
287 ** Ethernet PROM defines
288 */
289 #define PROBE_LENGTH 32
290 #define ETH_PROM_SIG 0xAA5500FFUL
291
292 /*
293 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
294 ** here is <= to the amount of shared memory set up by the board switches.
295 ** The number of descriptors MUST BE A POWER OF 2.
296 **
297 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
298 */
299 #define NUM_RX_DESC 8 /* Number of RX descriptors */
300 #define NUM_TX_DESC 8 /* Number of TX descriptors */
301 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
302 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
303
304 /*
305 ** EISA bus defines
306 */
307 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
308
309 /*
310 ** ISA Bus defines
311 */
312 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
313 #define DEPCA_TOTAL_SIZE 0x10
314
315 static struct {
316 u_long iobase;
317 struct platform_device *device;
318 } depca_io_ports[] = {
319 { 0x300, NULL },
320 { 0x200, NULL },
321 { 0 , NULL },
322 };
323
324 /*
325 ** Name <-> Adapter mapping
326 */
327 #define DEPCA_SIGNATURE {"DEPCA",\
328 "DE100","DE101",\
329 "DE200","DE201","DE202",\
330 "DE210","DE212",\
331 "DE422",\
332 ""}
333
334 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
335
336 enum depca_type {
337 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
338 };
339
340 static char depca_string[] = "depca";
341
342 static int depca_device_remove (struct device *device);
343
344 #ifdef CONFIG_EISA
345 struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
347 { "" }
348 };
349
350 static int depca_eisa_probe (struct device *device);
351
352 struct eisa_driver depca_eisa_driver = {
353 .id_table = depca_eisa_ids,
354 .driver = {
355 .name = depca_string,
356 .probe = depca_eisa_probe,
357 .remove = __devexit_p (depca_device_remove)
358 }
359 };
360 #endif
361
362 #ifdef CONFIG_MCA
363 /*
364 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
365 */
366 #define DE210_ID 0x628d
367 #define DE212_ID 0x6def
368
369 static short depca_mca_adapter_ids[] = {
370 DE210_ID,
371 DE212_ID,
372 0x0000
373 };
374
375 static char *depca_mca_adapter_name[] = {
376 "DEC EtherWORKS MC Adapter (DE210)",
377 "DEC EtherWORKS MC Adapter (DE212)",
378 NULL
379 };
380
381 static enum depca_type depca_mca_adapter_type[] = {
382 de210,
383 de212,
384 0
385 };
386
387 static int depca_mca_probe (struct device *);
388
389 static struct mca_driver depca_mca_driver = {
390 .id_table = depca_mca_adapter_ids,
391 .driver = {
392 .name = depca_string,
393 .bus = &mca_bus_type,
394 .probe = depca_mca_probe,
395 .remove = __devexit_p(depca_device_remove),
396 },
397 };
398 #endif
399
400 static int depca_isa_probe (struct device *);
401
402 static struct device_driver depca_isa_driver = {
403 .name = depca_string,
404 .bus = &platform_bus_type,
405 .probe = depca_isa_probe,
406 .remove = __devexit_p(depca_device_remove),
407 };
408
409 /*
410 ** Miscellaneous info...
411 */
412 #define DEPCA_STRLEN 16
413
414 /*
415 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
416 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
417 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
418 ** and hence the RX descriptor ring's first entry.
419 */
420 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
421 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
422 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
423
424 /*
425 ** The DEPCA Rx and Tx ring descriptors.
426 */
427 struct depca_rx_desc {
428 volatile s32 base;
429 s16 buf_length; /* This length is negative 2's complement! */
430 s16 msg_length; /* This length is "normal". */
431 };
432
433 struct depca_tx_desc {
434 volatile s32 base;
435 s16 length; /* This length is negative 2's complement! */
436 s16 misc; /* Errors and TDR info */
437 };
438
439 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
440 to LANCE memory address space */
441
442 /*
443 ** The Lance initialization block, described in databook, in common memory.
444 */
445 struct depca_init {
446 u16 mode; /* Mode register */
447 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
448 u8 mcast_table[8]; /* Multicast Hash Table. */
449 u32 rx_ring; /* Rx ring base pointer & ring length */
450 u32 tx_ring; /* Tx ring base pointer & ring length */
451 };
452
453 #define DEPCA_PKT_STAT_SZ 16
454 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
455 increase DEPCA_PKT_STAT_SZ */
456 struct depca_private {
457 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
458 enum depca_type adapter; /* Adapter type */
459 enum {
460 DEPCA_BUS_MCA = 1,
461 DEPCA_BUS_ISA,
462 DEPCA_BUS_EISA,
463 } depca_bus; /* type of bus */
464 struct depca_init init_block; /* Shadow Initialization block */
465 /* CPU address space fields */
466 struct depca_rx_desc *rx_ring; /* Pointer to start of RX descriptor ring */
467 struct depca_tx_desc *tx_ring; /* Pointer to start of TX descriptor ring */
468 void *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
469 void *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
470 void *sh_mem; /* CPU mapped virt address of device RAM */
471 u_long mem_start; /* Bus address of device RAM (before remap) */
472 u_long mem_len; /* device memory size */
473 /* Device address space fields */
474 u_long device_ram_start; /* Start of RAM in device addr space */
475 /* Offsets used in both address spaces */
476 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
477 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
478 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
479 /* Kernel-only (not device) fields */
480 int rx_new, tx_new; /* The next free ring entry */
481 int rx_old, tx_old; /* The ring entries to be free()ed. */
482 struct net_device_stats stats;
483 spinlock_t lock;
484 struct { /* Private stats counters */
485 u32 bins[DEPCA_PKT_STAT_SZ];
486 u32 unicast;
487 u32 multicast;
488 u32 broadcast;
489 u32 excessive_collisions;
490 u32 tx_underruns;
491 u32 excessive_underruns;
492 } pktStats;
493 int txRingMask; /* TX ring mask */
494 int rxRingMask; /* RX ring mask */
495 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
496 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
497 };
498
499 /*
500 ** The transmit ring full condition is described by the tx_old and tx_new
501 ** pointers by:
502 ** tx_old = tx_new Empty ring
503 ** tx_old = tx_new+1 Full ring
504 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
505 */
506 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
507 lp->tx_old+lp->txRingMask-lp->tx_new:\
508 lp->tx_old -lp->tx_new-1)
509
510 /*
511 ** Public Functions
512 */
513 static int depca_open(struct net_device *dev);
514 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
515 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs);
516 static int depca_close(struct net_device *dev);
517 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
518 static void depca_tx_timeout(struct net_device *dev);
519 static struct net_device_stats *depca_get_stats(struct net_device *dev);
520 static void set_multicast_list(struct net_device *dev);
521
522 /*
523 ** Private functions
524 */
525 static void depca_init_ring(struct net_device *dev);
526 static int depca_rx(struct net_device *dev);
527 static int depca_tx(struct net_device *dev);
528
529 static void LoadCSRs(struct net_device *dev);
530 static int InitRestartDepca(struct net_device *dev);
531 static int DepcaSignature(char *name, u_long paddr);
532 static int DevicePresent(u_long ioaddr);
533 static int get_hw_addr(struct net_device *dev);
534 static void SetMulticastFilter(struct net_device *dev);
535 static int load_packet(struct net_device *dev, struct sk_buff *skb);
536 static void depca_dbg_open(struct net_device *dev);
537
538 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
539 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
540 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
541 static u_char *depca_irq;
542
543 static int irq;
544 static int io;
545 static char *adapter_name;
546 static int mem; /* For loadable module assignment
547 use insmod mem=0x????? .... */
548 module_param (irq, int, 0);
549 module_param (io, int, 0);
550 module_param (adapter_name, charp, 0);
551 module_param (mem, int, 0);
552 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
553 MODULE_PARM_DESC(io, "DEPCA I/O base address");
554 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
555 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
556 MODULE_LICENSE("GPL");
557
558 /*
559 ** Miscellaneous defines...
560 */
561 #define STOP_DEPCA \
562 outw(CSR0, DEPCA_ADDR);\
563 outw(STOP, DEPCA_DATA)
564
565 static int __init depca_hw_init (struct net_device *dev, struct device *device)
566 {
567 struct depca_private *lp;
568 int i, j, offset, netRAM, mem_len, status = 0;
569 s16 nicsr;
570 u_long ioaddr;
571 u_long mem_start;
572
573 /*
574 * We are now supposed to enter this function with the
575 * following fields filled with proper values :
576 *
577 * dev->base_addr
578 * lp->mem_start
579 * lp->depca_bus
580 * lp->adapter
581 *
582 * dev->irq can be set if known from device configuration (on
583 * MCA or EISA) or module option. Otherwise, it will be auto
584 * detected.
585 */
586
587 ioaddr = dev->base_addr;
588
589 STOP_DEPCA;
590
591 nicsr = inb(DEPCA_NICSR);
592 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
593 outb(nicsr, DEPCA_NICSR);
594
595 if (inw(DEPCA_DATA) != STOP) {
596 return -ENXIO;
597 }
598
599 lp = (struct depca_private *) dev->priv;
600 mem_start = lp->mem_start;
601
602 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
603 return -ENXIO;
604
605 printk ("%s: %s at 0x%04lx",
606 device->bus_id, depca_signature[lp->adapter], ioaddr);
607
608 switch (lp->depca_bus) {
609 #ifdef CONFIG_MCA
610 case DEPCA_BUS_MCA:
611 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
612 break;
613 #endif
614
615 #ifdef CONFIG_EISA
616 case DEPCA_BUS_EISA:
617 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
618 break;
619 #endif
620
621 case DEPCA_BUS_ISA:
622 break;
623
624 default:
625 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
626 return -ENXIO;
627 }
628
629 printk(", h/w address ");
630 status = get_hw_addr(dev);
631 if (status != 0) {
632 printk(" which has an Ethernet PROM CRC error.\n");
633 return -ENXIO;
634 }
635 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
636 printk("%2.2x:", dev->dev_addr[i]);
637 }
638 printk("%2.2x", dev->dev_addr[i]);
639
640 /* Set up the maximum amount of network RAM(kB) */
641 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
642 if ((nicsr & _128KB) && (lp->adapter == de422))
643 netRAM = 128;
644
645 /* Shared Memory Base Address */
646 if (nicsr & BUF) {
647 nicsr &= ~BS; /* DEPCA RAM in top 32k */
648 netRAM -= 32;
649
650 /* Only EISA/ISA needs start address to be re-computed */
651 if (lp->depca_bus != DEPCA_BUS_MCA)
652 mem_start += 0x8000;
653 }
654
655 if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
656 > (netRAM << 10)) {
657 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
658 return -ENXIO;
659 }
660
661 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
662
663 /* Enable the shadow RAM. */
664 if (lp->adapter != DEPCA) {
665 nicsr |= SHE;
666 outb(nicsr, DEPCA_NICSR);
667 }
668
669 lp->lock = SPIN_LOCK_UNLOCKED;
670 sprintf(lp->adapter_name, "%s (%s)",
671 depca_signature[lp->adapter], device->bus_id);
672 status = -EBUSY;
673
674 /* Initialisation Block */
675 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
676 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
677 goto out_priv;
678 }
679
680 status = -EIO;
681 lp->sh_mem = ioremap(mem_start, mem_len);
682 if (lp->sh_mem == NULL) {
683 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
684 goto out1;
685 }
686
687 lp->mem_start = mem_start;
688 lp->mem_len = mem_len;
689 lp->device_ram_start = mem_start & LA_MASK;
690
691 offset = 0;
692 offset += sizeof(struct depca_init);
693
694 /* Tx & Rx descriptors (aligned to a quadword boundary) */
695 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
696 lp->rx_ring = (struct depca_rx_desc *) (lp->sh_mem + offset);
697 lp->rx_ring_offset = offset;
698
699 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
700 lp->tx_ring = (struct depca_tx_desc *) (lp->sh_mem + offset);
701 lp->tx_ring_offset = offset;
702
703 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
704
705 lp->buffs_offset = offset;
706
707 /* Finish initialising the ring information. */
708 lp->rxRingMask = NUM_RX_DESC - 1;
709 lp->txRingMask = NUM_TX_DESC - 1;
710
711 /* Calculate Tx/Rx RLEN size for the descriptors. */
712 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
713 j >>= 1;
714 }
715 lp->rx_rlen = (s32) (i << 29);
716 for (i = 0, j = lp->txRingMask; j > 0; i++) {
717 j >>= 1;
718 }
719 lp->tx_rlen = (s32) (i << 29);
720
721 /* Load the initialisation block */
722 depca_init_ring(dev);
723
724 /* Initialise the control and status registers */
725 LoadCSRs(dev);
726
727 /* Enable DEPCA board interrupts for autoprobing */
728 nicsr = ((nicsr & ~IM) | IEN);
729 outb(nicsr, DEPCA_NICSR);
730
731 /* To auto-IRQ we enable the initialization-done and DMA err,
732 interrupts. For now we will always get a DMA error. */
733 if (dev->irq < 2) {
734 unsigned char irqnum;
735 unsigned long irq_mask, delay;
736
737 irq_mask = probe_irq_on();
738
739 /* Assign the correct irq list */
740 switch (lp->adapter) {
741 case DEPCA:
742 case de100:
743 case de101:
744 depca_irq = de1xx_irq;
745 break;
746 case de200:
747 case de201:
748 case de202:
749 case de210:
750 case de212:
751 depca_irq = de2xx_irq;
752 break;
753 case de422:
754 depca_irq = de422_irq;
755 break;
756
757 default:
758 break; /* Not reached */
759 }
760
761 /* Trigger an initialization just for the interrupt. */
762 outw(INEA | INIT, DEPCA_DATA);
763
764 delay = jiffies + HZ/50;
765 while (time_before(jiffies, delay))
766 yield();
767
768 irqnum = probe_irq_off(irq_mask);
769
770 status = -ENXIO;
771 if (!irqnum) {
772 printk(" and failed to detect IRQ line.\n");
773 goto out2;
774 } else {
775 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
776 if (irqnum == depca_irq[i]) {
777 dev->irq = irqnum;
778 printk(" and uses IRQ%d.\n", dev->irq);
779 }
780
781 if (!dev->irq) {
782 printk(" but incorrect IRQ line detected.\n");
783 goto out2;
784 }
785 }
786 } else {
787 printk(" and assigned IRQ%d.\n", dev->irq);
788 }
789
790 if (depca_debug > 1) {
791 printk(version);
792 }
793
794 /* The DEPCA-specific entries in the device structure. */
795 dev->open = &depca_open;
796 dev->hard_start_xmit = &depca_start_xmit;
797 dev->stop = &depca_close;
798 dev->get_stats = &depca_get_stats;
799 dev->set_multicast_list = &set_multicast_list;
800 dev->do_ioctl = &depca_ioctl;
801 dev->tx_timeout = depca_tx_timeout;
802 dev->watchdog_timeo = TX_TIMEOUT;
803
804 dev->mem_start = 0;
805
806 device->driver_data = dev;
807 SET_NETDEV_DEV (dev, device);
808
809 status = register_netdev(dev);
810 if (status == 0)
811 return 0;
812 out2:
813 iounmap(lp->sh_mem);
814 out1:
815 release_mem_region (mem_start, mem_len);
816 out_priv:
817 return status;
818 }
819 \f
820
821 static int depca_open(struct net_device *dev)
822 {
823 struct depca_private *lp = (struct depca_private *) dev->priv;
824 u_long ioaddr = dev->base_addr;
825 s16 nicsr;
826 int status = 0;
827
828 STOP_DEPCA;
829 nicsr = inb(DEPCA_NICSR);
830
831 /* Make sure the shadow RAM is enabled */
832 if (lp->adapter != DEPCA) {
833 nicsr |= SHE;
834 outb(nicsr, DEPCA_NICSR);
835 }
836
837 /* Re-initialize the DEPCA... */
838 depca_init_ring(dev);
839 LoadCSRs(dev);
840
841 depca_dbg_open(dev);
842
843 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
844 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
845 status = -EAGAIN;
846 } else {
847
848 /* Enable DEPCA board interrupts and turn off LED */
849 nicsr = ((nicsr & ~IM & ~LED) | IEN);
850 outb(nicsr, DEPCA_NICSR);
851 outw(CSR0, DEPCA_ADDR);
852
853 netif_start_queue(dev);
854
855 status = InitRestartDepca(dev);
856
857 if (depca_debug > 1) {
858 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
859 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
860 }
861 }
862 return status;
863 }
864
865 /* Initialize the lance Rx and Tx descriptor rings. */
866 static void depca_init_ring(struct net_device *dev)
867 {
868 struct depca_private *lp = (struct depca_private *) dev->priv;
869 u_int i;
870 u_long offset;
871
872 /* Lock out other processes whilst setting up the hardware */
873 netif_stop_queue(dev);
874
875 lp->rx_new = lp->tx_new = 0;
876 lp->rx_old = lp->tx_old = 0;
877
878 /* Initialize the base address and length of each buffer in the ring */
879 for (i = 0; i <= lp->rxRingMask; i++) {
880 offset = lp->buffs_offset + i * RX_BUFF_SZ;
881 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
882 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
883 lp->rx_buff[i] = lp->sh_mem + offset;
884 }
885
886 for (i = 0; i <= lp->txRingMask; i++) {
887 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
888 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
889 lp->tx_buff[i] = lp->sh_mem + offset;
890 }
891
892 /* Set up the initialization block */
893 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
894 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
895
896 SetMulticastFilter(dev);
897
898 for (i = 0; i < ETH_ALEN; i++) {
899 lp->init_block.phys_addr[i] = dev->dev_addr[i];
900 }
901
902 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
903 }
904
905
906 static void depca_tx_timeout(struct net_device *dev)
907 {
908 u_long ioaddr = dev->base_addr;
909
910 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
911
912 STOP_DEPCA;
913 depca_init_ring(dev);
914 LoadCSRs(dev);
915 dev->trans_start = jiffies;
916 netif_wake_queue(dev);
917 InitRestartDepca(dev);
918 }
919
920
921 /*
922 ** Writes a socket buffer to TX descriptor ring and starts transmission
923 */
924 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
925 {
926 struct depca_private *lp = (struct depca_private *) dev->priv;
927 u_long ioaddr = dev->base_addr;
928 int status = 0;
929
930 /* Transmitter timeout, serious problems. */
931 if (skb->len < 1)
932 goto out;
933
934 if (skb->len < ETH_ZLEN) {
935 skb = skb_padto(skb, ETH_ZLEN);
936 if (skb == NULL)
937 goto out;
938 }
939
940 netif_stop_queue(dev);
941
942 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
943 status = load_packet(dev, skb);
944
945 if (!status) {
946 /* Trigger an immediate send demand. */
947 outw(CSR0, DEPCA_ADDR);
948 outw(INEA | TDMD, DEPCA_DATA);
949
950 dev->trans_start = jiffies;
951 dev_kfree_skb(skb);
952 }
953 if (TX_BUFFS_AVAIL)
954 netif_start_queue(dev);
955 } else
956 status = -1;
957
958 out:
959 return status;
960 }
961
962 /*
963 ** The DEPCA interrupt handler.
964 */
965 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
966 {
967 struct net_device *dev = dev_id;
968 struct depca_private *lp;
969 s16 csr0, nicsr;
970 u_long ioaddr;
971
972 if (dev == NULL) {
973 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
974 return IRQ_NONE;
975 }
976
977 lp = (struct depca_private *) dev->priv;
978 ioaddr = dev->base_addr;
979
980 spin_lock(&lp->lock);
981
982 /* mask the DEPCA board interrupts and turn on the LED */
983 nicsr = inb(DEPCA_NICSR);
984 nicsr |= (IM | LED);
985 outb(nicsr, DEPCA_NICSR);
986
987 outw(CSR0, DEPCA_ADDR);
988 csr0 = inw(DEPCA_DATA);
989
990 /* Acknowledge all of the current interrupt sources ASAP. */
991 outw(csr0 & INTE, DEPCA_DATA);
992
993 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
994 depca_rx(dev);
995
996 if (csr0 & TINT) /* Tx interrupt (packet sent) */
997 depca_tx(dev);
998
999 /* Any resources available? */
1000 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1001 netif_wake_queue(dev);
1002 }
1003
1004 /* Unmask the DEPCA board interrupts and turn off the LED */
1005 nicsr = (nicsr & ~IM & ~LED);
1006 outb(nicsr, DEPCA_NICSR);
1007
1008 spin_unlock(&lp->lock);
1009 return IRQ_HANDLED;
1010 }
1011
1012 /* Called with lp->lock held */
1013 static int depca_rx(struct net_device *dev)
1014 {
1015 struct depca_private *lp = (struct depca_private *) dev->priv;
1016 int i, entry;
1017 s32 status;
1018
1019 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1020 status = readl(&lp->rx_ring[entry].base) >> 16;
1021 if (status & R_STP) { /* Remember start of frame */
1022 lp->rx_old = entry;
1023 }
1024 if (status & R_ENP) { /* Valid frame status */
1025 if (status & R_ERR) { /* There was an error. */
1026 lp->stats.rx_errors++; /* Update the error stats. */
1027 if (status & R_FRAM)
1028 lp->stats.rx_frame_errors++;
1029 if (status & R_OFLO)
1030 lp->stats.rx_over_errors++;
1031 if (status & R_CRC)
1032 lp->stats.rx_crc_errors++;
1033 if (status & R_BUFF)
1034 lp->stats.rx_fifo_errors++;
1035 } else {
1036 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1037 struct sk_buff *skb;
1038
1039 skb = dev_alloc_skb(pkt_len + 2);
1040 if (skb != NULL) {
1041 unsigned char *buf;
1042 skb_reserve(skb, 2); /* 16 byte align the IP header */
1043 buf = skb_put(skb, pkt_len);
1044 skb->dev = dev;
1045 if (entry < lp->rx_old) { /* Wrapped buffer */
1046 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1047 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1048 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1049 } else { /* Linear buffer */
1050 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1051 }
1052
1053 /*
1054 ** Notify the upper protocol layers that there is another
1055 ** packet to handle
1056 */
1057 skb->protocol = eth_type_trans(skb, dev);
1058 netif_rx(skb);
1059
1060 /*
1061 ** Update stats
1062 */
1063 dev->last_rx = jiffies;
1064 lp->stats.rx_packets++;
1065 lp->stats.rx_bytes += pkt_len;
1066 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1067 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1068 lp->pktStats.bins[i]++;
1069 i = DEPCA_PKT_STAT_SZ;
1070 }
1071 }
1072 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1073 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1074 lp->pktStats.broadcast++;
1075 } else {
1076 lp->pktStats.multicast++;
1077 }
1078 } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1079 lp->pktStats.unicast++;
1080 }
1081
1082 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1083 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1084 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1085 }
1086 } else {
1087 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1088 lp->stats.rx_dropped++; /* Really, deferred. */
1089 break;
1090 }
1091 }
1092 /* Change buffer ownership for this last frame, back to the adapter */
1093 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1094 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1095 }
1096 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1097 }
1098
1099 /*
1100 ** Update entry information
1101 */
1102 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1103 }
1104
1105 return 0;
1106 }
1107
1108 /*
1109 ** Buffer sent - check for buffer errors.
1110 ** Called with lp->lock held
1111 */
1112 static int depca_tx(struct net_device *dev)
1113 {
1114 struct depca_private *lp = (struct depca_private *) dev->priv;
1115 int entry;
1116 s32 status;
1117 u_long ioaddr = dev->base_addr;
1118
1119 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1120 status = readl(&lp->tx_ring[entry].base) >> 16;
1121
1122 if (status < 0) { /* Packet not yet sent! */
1123 break;
1124 } else if (status & T_ERR) { /* An error occurred. */
1125 status = readl(&lp->tx_ring[entry].misc);
1126 lp->stats.tx_errors++;
1127 if (status & TMD3_RTRY)
1128 lp->stats.tx_aborted_errors++;
1129 if (status & TMD3_LCAR)
1130 lp->stats.tx_carrier_errors++;
1131 if (status & TMD3_LCOL)
1132 lp->stats.tx_window_errors++;
1133 if (status & TMD3_UFLO)
1134 lp->stats.tx_fifo_errors++;
1135 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1136 /* Trigger an immediate send demand. */
1137 outw(CSR0, DEPCA_ADDR);
1138 outw(INEA | TDMD, DEPCA_DATA);
1139 }
1140 } else if (status & (T_MORE | T_ONE)) {
1141 lp->stats.collisions++;
1142 } else {
1143 lp->stats.tx_packets++;
1144 }
1145
1146 /* Update all the pointers */
1147 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1148 }
1149
1150 return 0;
1151 }
1152
1153 static int depca_close(struct net_device *dev)
1154 {
1155 struct depca_private *lp = (struct depca_private *) dev->priv;
1156 s16 nicsr;
1157 u_long ioaddr = dev->base_addr;
1158
1159 netif_stop_queue(dev);
1160
1161 outw(CSR0, DEPCA_ADDR);
1162
1163 if (depca_debug > 1) {
1164 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1165 }
1166
1167 /*
1168 ** We stop the DEPCA here -- it occasionally polls
1169 ** memory if we don't.
1170 */
1171 outw(STOP, DEPCA_DATA);
1172
1173 /*
1174 ** Give back the ROM in case the user wants to go to DOS
1175 */
1176 if (lp->adapter != DEPCA) {
1177 nicsr = inb(DEPCA_NICSR);
1178 nicsr &= ~SHE;
1179 outb(nicsr, DEPCA_NICSR);
1180 }
1181
1182 /*
1183 ** Free the associated irq
1184 */
1185 free_irq(dev->irq, dev);
1186 return 0;
1187 }
1188
1189 static void LoadCSRs(struct net_device *dev)
1190 {
1191 struct depca_private *lp = (struct depca_private *) dev->priv;
1192 u_long ioaddr = dev->base_addr;
1193
1194 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1195 outw((u16) lp->device_ram_start, DEPCA_DATA);
1196 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1197 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1198 outw(CSR3, DEPCA_ADDR); /* ALE control */
1199 outw(ACON, DEPCA_DATA);
1200
1201 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1202
1203 return;
1204 }
1205
1206 static int InitRestartDepca(struct net_device *dev)
1207 {
1208 struct depca_private *lp = (struct depca_private *) dev->priv;
1209 u_long ioaddr = dev->base_addr;
1210 int i, status = 0;
1211
1212 /* Copy the shadow init_block to shared memory */
1213 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1214
1215 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1216 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1217
1218 /* wait for lance to complete initialisation */
1219 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1220
1221 if (i != 100) {
1222 /* clear IDON by writing a "1", enable interrupts and start lance */
1223 outw(IDON | INEA | STRT, DEPCA_DATA);
1224 if (depca_debug > 2) {
1225 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, virt_to_phys(lp->sh_mem), inw(DEPCA_DATA));
1226 }
1227 } else {
1228 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, virt_to_phys(lp->sh_mem), inw(DEPCA_DATA));
1229 status = -1;
1230 }
1231
1232 return status;
1233 }
1234
1235 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1236 {
1237 struct depca_private *lp = (struct depca_private *) dev->priv;
1238
1239 /* Null body since there is no framing error counter */
1240
1241 return &lp->stats;
1242 }
1243
1244 /*
1245 ** Set or clear the multicast filter for this adaptor.
1246 */
1247 static void set_multicast_list(struct net_device *dev)
1248 {
1249 struct depca_private *lp = (struct depca_private *) dev->priv;
1250 u_long ioaddr = dev->base_addr;
1251
1252 if (dev) {
1253 netif_stop_queue(dev);
1254 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1255
1256 STOP_DEPCA; /* Temporarily stop the depca. */
1257 depca_init_ring(dev); /* Initialize the descriptor rings */
1258
1259 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1260 lp->init_block.mode |= PROM;
1261 } else {
1262 SetMulticastFilter(dev);
1263 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1264 }
1265
1266 LoadCSRs(dev); /* Reload CSR3 */
1267 InitRestartDepca(dev); /* Resume normal operation. */
1268 netif_start_queue(dev); /* Unlock the TX ring */
1269 }
1270 }
1271
1272 /*
1273 ** Calculate the hash code and update the logical address filter
1274 ** from a list of ethernet multicast addresses.
1275 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1276 ** LANCE calculates its hash codes big endian.
1277 */
1278 static void SetMulticastFilter(struct net_device *dev)
1279 {
1280 struct depca_private *lp = (struct depca_private *) dev->priv;
1281 struct dev_mc_list *dmi = dev->mc_list;
1282 char *addrs;
1283 int i, j, bit, byte;
1284 u16 hashcode;
1285 u32 crc;
1286
1287 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1288 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1289 lp->init_block.mcast_table[i] = (char) 0xff;
1290 }
1291 } else {
1292 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1293 lp->init_block.mcast_table[i] = 0;
1294 }
1295 /* Add multicast addresses */
1296 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1297 addrs = dmi->dmi_addr;
1298 dmi = dmi->next;
1299 if ((*addrs & 0x01) == 1) { /* multicast address? */
1300 crc = ether_crc(ETH_ALEN, addrs);
1301 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1302 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1303 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1304 }
1305
1306
1307 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1308 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1309 lp->init_block.mcast_table[byte] |= bit;
1310 }
1311 }
1312 }
1313
1314 return;
1315 }
1316
1317 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1318 {
1319 int status = 0;
1320
1321 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1322 status = -EBUSY;
1323 goto out;
1324 }
1325
1326 if (DevicePresent(ioaddr)) {
1327 status = -ENODEV;
1328 goto out_release;
1329 }
1330
1331 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1332 status = -ENOMEM;
1333 goto out_release;
1334 }
1335
1336 return 0;
1337
1338 out_release:
1339 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1340 out:
1341 return status;
1342 }
1343
1344 #ifdef CONFIG_MCA
1345 /*
1346 ** Microchannel bus I/O device probe
1347 */
1348 static int __init depca_mca_probe(struct device *device)
1349 {
1350 unsigned char pos[2];
1351 unsigned char where;
1352 unsigned long iobase, mem_start;
1353 int irq, err;
1354 struct mca_device *mdev = to_mca_device (device);
1355 struct net_device *dev;
1356 struct depca_private *lp;
1357
1358 /*
1359 ** Search for the adapter. If an address has been given, search
1360 ** specifically for the card at that address. Otherwise find the
1361 ** first card in the system.
1362 */
1363
1364 pos[0] = mca_device_read_stored_pos(mdev, 2);
1365 pos[1] = mca_device_read_stored_pos(mdev, 3);
1366
1367 /*
1368 ** IO of card is handled by bits 1 and 2 of pos0.
1369 **
1370 ** bit2 bit1 IO
1371 ** 0 0 0x2c00
1372 ** 0 1 0x2c10
1373 ** 1 0 0x2c20
1374 ** 1 1 0x2c30
1375 */
1376 where = (pos[0] & 6) >> 1;
1377 iobase = 0x2c00 + (0x10 * where);
1378
1379 /*
1380 ** Found the adapter we were looking for. Now start setting it up.
1381 **
1382 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1383 ** of pos1. Bits are as follows (from the ADF file):
1384 **
1385 ** Bits
1386 ** 3 2 1 0 IRQ
1387 ** --------------------
1388 ** 0 0 1 0 5
1389 ** 0 0 0 1 9
1390 ** 0 1 0 0 10
1391 ** 1 0 0 0 11
1392 */
1393 where = pos[1] & 0x0f;
1394 switch (where) {
1395 case 1:
1396 irq = 9;
1397 break;
1398 case 2:
1399 irq = 5;
1400 break;
1401 case 4:
1402 irq = 10;
1403 break;
1404 case 8:
1405 irq = 11;
1406 break;
1407 default:
1408 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", dev->name, where);
1409 return -EINVAL;
1410 }
1411
1412 /*
1413 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1414 ** They are mapped as follows:
1415 **
1416 ** Bit
1417 ** 5 4 3 Memory Addresses
1418 ** 0 0 0 C0000-CFFFF (64K)
1419 ** 1 0 0 C8000-CFFFF (32K)
1420 ** 0 0 1 D0000-DFFFF (64K)
1421 ** 1 0 1 D8000-DFFFF (32K)
1422 ** 0 1 0 E0000-EFFFF (64K)
1423 ** 1 1 0 E8000-EFFFF (32K)
1424 */
1425 where = (pos[0] & 0x18) >> 3;
1426 mem_start = 0xc0000 + (where * 0x10000);
1427 if (pos[0] & 0x20) {
1428 mem_start += 0x8000;
1429 }
1430
1431 /* claim the slot */
1432 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1433 sizeof(mdev->name));
1434 mca_device_set_claim(mdev, 1);
1435
1436 /*
1437 ** Get everything allocated and initialized... (almost just
1438 ** like the ISA and EISA probes)
1439 */
1440 irq = mca_device_transform_irq(mdev, irq);
1441 iobase = mca_device_transform_ioport(mdev, iobase);
1442
1443 if ((err = depca_common_init (iobase, &dev)))
1444 goto out_unclaim;
1445
1446 dev->irq = irq;
1447 dev->base_addr = iobase;
1448 lp = dev->priv;
1449 lp->depca_bus = DEPCA_BUS_MCA;
1450 lp->adapter = depca_mca_adapter_type[mdev->index];
1451 lp->mem_start = mem_start;
1452
1453 if ((err = depca_hw_init(dev, device)))
1454 goto out_free;
1455
1456 return 0;
1457
1458 out_free:
1459 free_netdev (dev);
1460 release_region (iobase, DEPCA_TOTAL_SIZE);
1461 out_unclaim:
1462 mca_device_set_claim(mdev, 0);
1463
1464 return err;
1465 }
1466 #endif
1467
1468 /*
1469 ** ISA bus I/O device probe
1470 */
1471
1472 static void depca_platform_release (struct device *device)
1473 {
1474 struct platform_device *pldev;
1475
1476 /* free device */
1477 pldev = to_platform_device (device);
1478 kfree (pldev);
1479 }
1480
1481 static void __init depca_platform_probe (void)
1482 {
1483 int i;
1484 struct platform_device *pldev;
1485
1486 for (i = 0; depca_io_ports[i].iobase; i++) {
1487 depca_io_ports[i].device = NULL;
1488
1489 /* if an address has been specified on the command
1490 * line, use it (if valid) */
1491 if (io && io != depca_io_ports[i].iobase)
1492 continue;
1493
1494 if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL)))
1495 continue;
1496
1497 memset (pldev, 0, sizeof (*pldev));
1498 pldev->name = depca_string;
1499 pldev->id = i;
1500 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1501 pldev->dev.release = depca_platform_release;
1502 depca_io_ports[i].device = pldev;
1503
1504 if (platform_device_register (pldev)) {
1505 kfree (pldev);
1506 depca_io_ports[i].device = NULL;
1507 continue;
1508 }
1509
1510 if (!pldev->dev.driver) {
1511 /* The driver was not bound to this device, there was
1512 * no hardware at this address. Unregister it, as the
1513 * release fuction will take care of freeing the
1514 * allocated structure */
1515
1516 depca_io_ports[i].device = NULL;
1517 platform_device_unregister (pldev);
1518 }
1519 }
1520 }
1521
1522 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1523 {
1524 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1525 enum depca_type adapter = unknown;
1526 int i;
1527
1528 for (i = 0; mem_base[i]; i++) {
1529 *mem_start = mem ? mem : mem_base[i];
1530 adapter = DepcaSignature (adapter_name, *mem_start);
1531 if (adapter != unknown)
1532 break;
1533 }
1534
1535 return adapter;
1536 }
1537
1538 static int __init depca_isa_probe (struct device *device)
1539 {
1540 struct net_device *dev;
1541 struct depca_private *lp;
1542 u_long ioaddr, mem_start = 0;
1543 enum depca_type adapter = unknown;
1544 int status = 0;
1545
1546 ioaddr = (u_long) device->platform_data;
1547
1548 if ((status = depca_common_init (ioaddr, &dev)))
1549 goto out;
1550
1551 adapter = depca_shmem_probe (&mem_start);
1552
1553 if (adapter == unknown) {
1554 status = -ENODEV;
1555 goto out_free;
1556 }
1557
1558 dev->base_addr = ioaddr;
1559 dev->irq = irq; /* Use whatever value the user gave
1560 * us, and 0 if he didn't. */
1561 lp = dev->priv;
1562 lp->depca_bus = DEPCA_BUS_ISA;
1563 lp->adapter = adapter;
1564 lp->mem_start = mem_start;
1565
1566 if ((status = depca_hw_init(dev, device)))
1567 goto out_free;
1568
1569 return 0;
1570
1571 out_free:
1572 free_netdev (dev);
1573 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1574 out:
1575 return status;
1576 }
1577
1578 /*
1579 ** EISA callbacks from sysfs.
1580 */
1581
1582 #ifdef CONFIG_EISA
1583 static int __init depca_eisa_probe (struct device *device)
1584 {
1585 struct eisa_device *edev;
1586 struct net_device *dev;
1587 struct depca_private *lp;
1588 u_long ioaddr, mem_start;
1589 int status = 0;
1590
1591 edev = to_eisa_device (device);
1592 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1593
1594 if ((status = depca_common_init (ioaddr, &dev)))
1595 goto out;
1596
1597 /* It would have been nice to get card configuration from the
1598 * card. Unfortunately, this register is write-only (shares
1599 * it's address with the ethernet prom)... As we don't parse
1600 * the EISA configuration structures (yet... :-), just rely on
1601 * the ISA probing to sort it out... */
1602
1603 depca_shmem_probe (&mem_start);
1604
1605 dev->base_addr = ioaddr;
1606 dev->irq = irq;
1607 lp = dev->priv;
1608 lp->depca_bus = DEPCA_BUS_EISA;
1609 lp->adapter = edev->id.driver_data;
1610 lp->mem_start = mem_start;
1611
1612 if ((status = depca_hw_init(dev, device)))
1613 goto out_free;
1614
1615 return 0;
1616
1617 out_free:
1618 free_netdev (dev);
1619 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1620 out:
1621 return status;
1622 }
1623 #endif
1624
1625 static int __devexit depca_device_remove (struct device *device)
1626 {
1627 struct net_device *dev;
1628 struct depca_private *lp;
1629 int bus;
1630
1631 dev = device->driver_data;
1632 lp = dev->priv;
1633
1634 unregister_netdev (dev);
1635 iounmap (lp->sh_mem);
1636 release_mem_region (lp->mem_start, lp->mem_len);
1637 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1638 bus = lp->depca_bus;
1639 free_netdev (dev);
1640
1641 return 0;
1642 }
1643
1644 /*
1645 ** Look for a particular board name in the on-board Remote Diagnostics
1646 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1647 ** base address.
1648 */
1649 static int __init DepcaSignature(char *name, u_long base_addr)
1650 {
1651 u_int i, j, k;
1652 void *ptr;
1653 char tmpstr[16];
1654 u_long prom_addr = base_addr + 0xc000;
1655 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1656
1657 /* Can't reserve the prom region, it is already marked as
1658 * used, at least on x86. Instead, reserve a memory region a
1659 * board would certainly use. If it works, go ahead. If not,
1660 * run like hell... */
1661
1662 if (!request_mem_region (mem_addr, 16, depca_string))
1663 return unknown;
1664
1665 /* Copy the first 16 bytes of ROM */
1666
1667 ptr = ioremap(prom_addr, 16);
1668 if (ptr == NULL) {
1669 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1670 return unknown;
1671 }
1672 for (i = 0; i < 16; i++) {
1673 tmpstr[i] = readb(ptr + i);
1674 }
1675 iounmap(ptr);
1676
1677 release_mem_region (mem_addr, 16);
1678
1679 /* Check if PROM contains a valid string */
1680 for (i = 0; *depca_signature[i] != '\0'; i++) {
1681 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1682 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1683 k++;
1684 } else { /* lost signature; begin search again */
1685 k = 0;
1686 }
1687 }
1688 if (k == strlen(depca_signature[i]))
1689 break;
1690 }
1691
1692 /* Check if name string is valid, provided there's no PROM */
1693 if (name && *name && (i == unknown)) {
1694 for (i = 0; *depca_signature[i] != '\0'; i++) {
1695 if (strcmp(name, depca_signature[i]) == 0)
1696 break;
1697 }
1698 }
1699
1700 return i;
1701 }
1702
1703 /*
1704 ** Look for a special sequence in the Ethernet station address PROM that
1705 ** is common across all DEPCA products. Note that the original DEPCA needs
1706 ** its ROM address counter to be initialized and enabled. Only enable
1707 ** if the first address octet is a 0x08 - this minimises the chances of
1708 ** messing around with some other hardware, but it assumes that this DEPCA
1709 ** card initialized itself correctly.
1710 **
1711 ** Search the Ethernet address ROM for the signature. Since the ROM address
1712 ** counter can start at an arbitrary point, the search must include the entire
1713 ** probe sequence length plus the (length_of_the_signature - 1).
1714 ** Stop the search IMMEDIATELY after the signature is found so that the
1715 ** PROM address counter is correctly positioned at the start of the
1716 ** ethernet address for later read out.
1717 */
1718 static int __init DevicePresent(u_long ioaddr)
1719 {
1720 union {
1721 struct {
1722 u32 a;
1723 u32 b;
1724 } llsig;
1725 char Sig[sizeof(u32) << 1];
1726 }
1727 dev;
1728 short sigLength = 0;
1729 s8 data;
1730 s16 nicsr;
1731 int i, j, status = 0;
1732
1733 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1734 data = inb(DEPCA_PROM); /* read data */
1735
1736 if (data == 0x08) { /* Enable counter on DEPCA */
1737 nicsr = inb(DEPCA_NICSR);
1738 nicsr |= AAC;
1739 outb(nicsr, DEPCA_NICSR);
1740 }
1741
1742 dev.llsig.a = ETH_PROM_SIG;
1743 dev.llsig.b = ETH_PROM_SIG;
1744 sigLength = sizeof(u32) << 1;
1745
1746 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1747 data = inb(DEPCA_PROM);
1748 if (dev.Sig[j] == data) { /* track signature */
1749 j++;
1750 } else { /* lost signature; begin search again */
1751 if (data == dev.Sig[0]) { /* rare case.... */
1752 j = 1;
1753 } else {
1754 j = 0;
1755 }
1756 }
1757 }
1758
1759 if (j != sigLength) {
1760 status = -ENODEV; /* search failed */
1761 }
1762
1763 return status;
1764 }
1765
1766 /*
1767 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1768 ** reason: access the upper half of the PROM with x=0; access the lower half
1769 ** with x=1.
1770 */
1771 static int __init get_hw_addr(struct net_device *dev)
1772 {
1773 u_long ioaddr = dev->base_addr;
1774 struct depca_private *lp = dev->priv;
1775 int i, k, tmp, status = 0;
1776 u_short j, x, chksum;
1777
1778 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1779
1780 for (i = 0, k = 0, j = 0; j < 3; j++) {
1781 k <<= 1;
1782 if (k > 0xffff)
1783 k -= 0xffff;
1784
1785 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1786 dev->dev_addr[i++] = (u_char) tmp;
1787 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1788 dev->dev_addr[i++] = (u_char) tmp;
1789
1790 if (k > 0xffff)
1791 k -= 0xffff;
1792 }
1793 if (k == 0xffff)
1794 k = 0;
1795
1796 chksum = (u_char) inb(DEPCA_PROM + x);
1797 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1798 if (k != chksum)
1799 status = -1;
1800
1801 return status;
1802 }
1803
1804 /*
1805 ** Load a packet into the shared memory
1806 */
1807 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1808 {
1809 struct depca_private *lp = (struct depca_private *) dev->priv;
1810 int i, entry, end, len, status = 0;
1811
1812 entry = lp->tx_new; /* Ring around buffer number. */
1813 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1814 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1815 /*
1816 ** Caution: the write order is important here... don't set up the
1817 ** ownership rights until all the other information is in place.
1818 */
1819 if (end < entry) { /* wrapped buffer */
1820 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1821 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1822 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1823 } else { /* linear buffer */
1824 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1825 }
1826
1827 /* set up the buffer descriptors */
1828 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1829 for (i = entry; i != end; i = (++i) & lp->txRingMask) {
1830 /* clean out flags */
1831 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1832 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1833 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1834 len -= TX_BUFF_SZ;
1835 }
1836 /* clean out flags */
1837 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1838 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1839 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1840
1841 /* start of packet */
1842 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1843 /* end of packet */
1844 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1845
1846 for (i = end; i != entry; --i) {
1847 /* ownership of packet */
1848 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1849 if (i == 0)
1850 i = lp->txRingMask + 1;
1851 }
1852 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1853
1854 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1855 } else {
1856 status = -1;
1857 }
1858
1859 return status;
1860 }
1861
1862 static void depca_dbg_open(struct net_device *dev)
1863 {
1864 struct depca_private *lp = (struct depca_private *) dev->priv;
1865 u_long ioaddr = dev->base_addr;
1866 struct depca_init *p = &lp->init_block;
1867 int i;
1868
1869 if (depca_debug > 1) {
1870 /* Do not copy the shadow init block into shared memory */
1871 /* Debugging should not affect normal operation! */
1872 /* The shadow init block will get copied across during InitRestartDepca */
1873 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1874 printk("Descriptor head addresses (CPU):\n");
1875 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1876 printk("Descriptor addresses (CPU):\nRX: ");
1877 for (i = 0; i < lp->rxRingMask; i++) {
1878 if (i < 3) {
1879 printk("0x%8.8lx ", (long) &lp->rx_ring[i].base);
1880 }
1881 }
1882 printk("...0x%8.8lx\n", (long) &lp->rx_ring[i].base);
1883 printk("TX: ");
1884 for (i = 0; i < lp->txRingMask; i++) {
1885 if (i < 3) {
1886 printk("0x%8.8lx ", (long) &lp->tx_ring[i].base);
1887 }
1888 }
1889 printk("...0x%8.8lx\n", (long) &lp->tx_ring[i].base);
1890 printk("\nDescriptor buffers (Device):\nRX: ");
1891 for (i = 0; i < lp->rxRingMask; i++) {
1892 if (i < 3) {
1893 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1894 }
1895 }
1896 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1897 printk("TX: ");
1898 for (i = 0; i < lp->txRingMask; i++) {
1899 if (i < 3) {
1900 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1901 }
1902 }
1903 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1904 printk("Initialisation block at 0x%8.8lx(Phys)\n", virt_to_phys(lp->sh_mem));
1905 printk(" mode: 0x%4.4x\n", p->mode);
1906 printk(" physical address: ");
1907 for (i = 0; i < ETH_ALEN - 1; i++) {
1908 printk("%2.2x:", p->phys_addr[i]);
1909 }
1910 printk("%2.2x\n", p->phys_addr[i]);
1911 printk(" multicast hash table: ");
1912 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1913 printk("%2.2x:", p->mcast_table[i]);
1914 }
1915 printk("%2.2x\n", p->mcast_table[i]);
1916 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1917 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1918 printk("buffers (Phys): 0x%8.8lx\n", virt_to_phys(lp->sh_mem) + lp->buffs_offset);
1919 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1920 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1921 outw(CSR2, DEPCA_ADDR);
1922 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1923 outw(CSR1, DEPCA_ADDR);
1924 printk("%4.4x\n", inw(DEPCA_DATA));
1925 outw(CSR3, DEPCA_ADDR);
1926 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1927 }
1928
1929 return;
1930 }
1931
1932 /*
1933 ** Perform IOCTL call functions here. Some are privileged operations and the
1934 ** effective uid is checked in those cases.
1935 ** All multicast IOCTLs will not work here and are for testing purposes only.
1936 */
1937 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1938 {
1939 struct depca_private *lp = (struct depca_private *) dev->priv;
1940 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1941 int i, status = 0;
1942 u_long ioaddr = dev->base_addr;
1943 union {
1944 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1945 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1946 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1947 } tmp;
1948 unsigned long flags;
1949 void *buf;
1950
1951 switch (ioc->cmd) {
1952 case DEPCA_GET_HWADDR: /* Get the hardware address */
1953 for (i = 0; i < ETH_ALEN; i++) {
1954 tmp.addr[i] = dev->dev_addr[i];
1955 }
1956 ioc->len = ETH_ALEN;
1957 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1958 return -EFAULT;
1959 break;
1960
1961 case DEPCA_SET_HWADDR: /* Set the hardware address */
1962 if (!capable(CAP_NET_ADMIN))
1963 return -EPERM;
1964 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1965 return -EFAULT;
1966 for (i = 0; i < ETH_ALEN; i++) {
1967 dev->dev_addr[i] = tmp.addr[i];
1968 }
1969 netif_stop_queue(dev);
1970 while (lp->tx_old != lp->tx_new)
1971 cpu_relax(); /* Wait for the ring to empty */
1972
1973 STOP_DEPCA; /* Temporarily stop the depca. */
1974 depca_init_ring(dev); /* Initialize the descriptor rings */
1975 LoadCSRs(dev); /* Reload CSR3 */
1976 InitRestartDepca(dev); /* Resume normal operation. */
1977 netif_start_queue(dev); /* Unlock the TX ring */
1978 break;
1979
1980 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1981 if (!capable(CAP_NET_ADMIN))
1982 return -EPERM;
1983 netif_stop_queue(dev);
1984 while (lp->tx_old != lp->tx_new)
1985 cpu_relax(); /* Wait for the ring to empty */
1986
1987 STOP_DEPCA; /* Temporarily stop the depca. */
1988 depca_init_ring(dev); /* Initialize the descriptor rings */
1989 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1990
1991 LoadCSRs(dev); /* Reload CSR3 */
1992 InitRestartDepca(dev); /* Resume normal operation. */
1993 netif_start_queue(dev); /* Unlock the TX ring */
1994 break;
1995
1996 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1997 if (!capable(CAP_NET_ADMIN))
1998 return -EPERM;
1999 netif_stop_queue(dev);
2000 while (lp->tx_old != lp->tx_new)
2001 cpu_relax(); /* Wait for the ring to empty */
2002
2003 STOP_DEPCA; /* Temporarily stop the depca. */
2004 depca_init_ring(dev); /* Initialize the descriptor rings */
2005 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
2006
2007 LoadCSRs(dev); /* Reload CSR3 */
2008 InitRestartDepca(dev); /* Resume normal operation. */
2009 netif_start_queue(dev); /* Unlock the TX ring */
2010 break;
2011
2012 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2013 if(!capable(CAP_NET_ADMIN))
2014 return -EPERM;
2015 printk("%s: Boo!\n", dev->name);
2016 break;
2017
2018 case DEPCA_GET_MCA: /* Get the multicast address table */
2019 ioc->len = (HASH_TABLE_LEN >> 3);
2020 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2021 return -EFAULT;
2022 break;
2023
2024 case DEPCA_SET_MCA: /* Set a multicast address */
2025 if (!capable(CAP_NET_ADMIN))
2026 return -EPERM;
2027 if (ioc->len >= HASH_TABLE_LEN)
2028 return -EINVAL;
2029 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2030 return -EFAULT;
2031 set_multicast_list(dev);
2032 break;
2033
2034 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2035 if (!capable(CAP_NET_ADMIN))
2036 return -EPERM;
2037 set_multicast_list(dev);
2038 break;
2039
2040 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2041 if (!capable(CAP_NET_ADMIN))
2042 return -EPERM;
2043 set_multicast_list(dev);
2044 break;
2045
2046 case DEPCA_GET_STATS: /* Get the driver statistics */
2047 ioc->len = sizeof(lp->pktStats);
2048 buf = kmalloc(ioc->len, GFP_KERNEL);
2049 if(!buf)
2050 return -ENOMEM;
2051 spin_lock_irqsave(&lp->lock, flags);
2052 memcpy(buf, &lp->pktStats, ioc->len);
2053 spin_unlock_irqrestore(&lp->lock, flags);
2054 if (copy_to_user(ioc->data, buf, ioc->len))
2055 status = -EFAULT;
2056 kfree(buf);
2057 break;
2058
2059 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2060 if (!capable(CAP_NET_ADMIN))
2061 return -EPERM;
2062 spin_lock_irqsave(&lp->lock, flags);
2063 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2064 spin_unlock_irqrestore(&lp->lock, flags);
2065 break;
2066
2067 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2068 i = 0;
2069 tmp.sval[i++] = inw(DEPCA_NICSR);
2070 outw(CSR0, DEPCA_ADDR); /* status register */
2071 tmp.sval[i++] = inw(DEPCA_DATA);
2072 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2073 ioc->len = i + sizeof(struct depca_init);
2074 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2075 return -EFAULT;
2076 break;
2077
2078 default:
2079 return -EOPNOTSUPP;
2080 }
2081
2082 return status;
2083 }
2084
2085 static int __init depca_module_init (void)
2086 {
2087 int err = 0;
2088
2089 #ifdef CONFIG_MCA
2090 err = mca_register_driver (&depca_mca_driver);
2091 #endif
2092 #ifdef CONFIG_EISA
2093 err |= eisa_driver_register (&depca_eisa_driver);
2094 #endif
2095 err |= driver_register (&depca_isa_driver);
2096 depca_platform_probe ();
2097
2098 return err;
2099 }
2100
2101 static void __exit depca_module_exit (void)
2102 {
2103 int i;
2104 #ifdef CONFIG_MCA
2105 mca_unregister_driver (&depca_mca_driver);
2106 #endif
2107 #ifdef CONFIG_EISA
2108 eisa_driver_unregister (&depca_eisa_driver);
2109 #endif
2110 driver_unregister (&depca_isa_driver);
2111
2112 for (i = 0; depca_io_ports[i].iobase; i++) {
2113 if (depca_io_ports[i].device) {
2114 platform_device_unregister (depca_io_ports[i].device);
2115 depca_io_ports[i].device = NULL;
2116 }
2117 }
2118 }
2119
2120 module_init (depca_module_init);
2121 module_exit (depca_module_exit);
MOXA 2.6.9 from sdlinux-moxaart.tgz