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[hh.org.git] / drivers / net / depca.c
blob5113eef755b98cbc5104d9e4a4aff493b6a5be67
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/module.h>
239 #include <linux/kernel.h>
240 #include <linux/string.h>
241 #include <linux/errno.h>
242 #include <linux/ioport.h>
243 #include <linux/slab.h>
244 #include <linux/interrupt.h>
245 #include <linux/delay.h>
246 #include <linux/init.h>
247 #include <linux/crc32.h>
248 #include <linux/netdevice.h>
249 #include <linux/etherdevice.h>
250 #include <linux/skbuff.h>
251 #include <linux/time.h>
252 #include <linux/types.h>
253 #include <linux/unistd.h>
254 #include <linux/ctype.h>
255 #include <linux/moduleparam.h>
256 #include <linux/platform_device.h>
257 #include <linux/bitops.h>
258
259 #include <asm/uaccess.h>
260 #include <asm/io.h>
261 #include <asm/dma.h>
262
263 #ifdef CONFIG_MCA
264 #include <linux/mca.h>
265 #endif
266
267 #ifdef CONFIG_EISA
268 #include <linux/eisa.h>
269 #endif
270
271 #include "depca.h"
272
273 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
274
275 #ifdef DEPCA_DEBUG
276 static int depca_debug = DEPCA_DEBUG;
277 #else
278 static int depca_debug = 1;
279 #endif
280
281 #define DEPCA_NDA 0xffe0 /* No Device Address */
282
283 #define TX_TIMEOUT (1*HZ)
284
285 /*
286 ** Ethernet PROM defines
287 */
288 #define PROBE_LENGTH 32
289 #define ETH_PROM_SIG 0xAA5500FFUL
290
291 /*
292 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
293 ** here is <= to the amount of shared memory set up by the board switches.
294 ** The number of descriptors MUST BE A POWER OF 2.
295 **
296 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
297 */
298 #define NUM_RX_DESC 8 /* Number of RX descriptors */
299 #define NUM_TX_DESC 8 /* Number of TX descriptors */
300 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
301 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
302
303 /*
304 ** EISA bus defines
305 */
306 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
307
308 /*
309 ** ISA Bus defines
310 */
311 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
312 #define DEPCA_TOTAL_SIZE 0x10
313
314 static struct {
315 u_long iobase;
316 struct platform_device *device;
317 } depca_io_ports[] = {
318 { 0x300, NULL },
319 { 0x200, NULL },
320 { 0 , NULL },
321 };
322
323 /*
324 ** Name <-> Adapter mapping
325 */
326 #define DEPCA_SIGNATURE {"DEPCA",\
327 "DE100","DE101",\
328 "DE200","DE201","DE202",\
329 "DE210","DE212",\
330 "DE422",\
331 ""}
332
333 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
334
335 enum depca_type {
336 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
337 };
338
339 static char depca_string[] = "depca";
340
341 static int depca_device_remove (struct device *device);
342
343 #ifdef CONFIG_EISA
344 static struct eisa_device_id depca_eisa_ids[] = {
345 { "DEC4220", de422 },
346 { "" }
347 };
348 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
349
350 static int depca_eisa_probe (struct device *device);
351
352 static 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 platform_device *);
401
402 static int __devexit depca_isa_remove(struct platform_device *pdev)
403 {
404 return depca_device_remove(&pdev->dev);
405 }
406
407 static struct platform_driver depca_isa_driver = {
408 .probe = depca_isa_probe,
409 .remove = __devexit_p(depca_isa_remove),
410 .driver = {
411 .name = depca_string,
412 },
413 };
414
415 /*
416 ** Miscellaneous info...
417 */
418 #define DEPCA_STRLEN 16
419
420 /*
421 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
422 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
423 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
424 ** and hence the RX descriptor ring's first entry.
425 */
426 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
427 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
428 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
429
430 /*
431 ** The DEPCA Rx and Tx ring descriptors.
432 */
433 struct depca_rx_desc {
434 volatile s32 base;
435 s16 buf_length; /* This length is negative 2's complement! */
436 s16 msg_length; /* This length is "normal". */
437 };
438
439 struct depca_tx_desc {
440 volatile s32 base;
441 s16 length; /* This length is negative 2's complement! */
442 s16 misc; /* Errors and TDR info */
443 };
444
445 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
446 to LANCE memory address space */
447
448 /*
449 ** The Lance initialization block, described in databook, in common memory.
450 */
451 struct depca_init {
452 u16 mode; /* Mode register */
453 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
454 u8 mcast_table[8]; /* Multicast Hash Table. */
455 u32 rx_ring; /* Rx ring base pointer & ring length */
456 u32 tx_ring; /* Tx ring base pointer & ring length */
457 };
458
459 #define DEPCA_PKT_STAT_SZ 16
460 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
461 increase DEPCA_PKT_STAT_SZ */
462 struct depca_private {
463 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
464 enum depca_type adapter; /* Adapter type */
465 enum {
466 DEPCA_BUS_MCA = 1,
467 DEPCA_BUS_ISA,
468 DEPCA_BUS_EISA,
469 } depca_bus; /* type of bus */
470 struct depca_init init_block; /* Shadow Initialization block */
471 /* CPU address space fields */
472 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
473 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
474 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
475 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
477 u_long mem_start; /* Bus address of device RAM (before remap) */
478 u_long mem_len; /* device memory size */
479 /* Device address space fields */
480 u_long device_ram_start; /* Start of RAM in device addr space */
481 /* Offsets used in both address spaces */
482 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
483 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
484 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
485 /* Kernel-only (not device) fields */
486 int rx_new, tx_new; /* The next free ring entry */
487 int rx_old, tx_old; /* The ring entries to be free()ed. */
488 struct net_device_stats stats;
489 spinlock_t lock;
490 struct { /* Private stats counters */
491 u32 bins[DEPCA_PKT_STAT_SZ];
492 u32 unicast;
493 u32 multicast;
494 u32 broadcast;
495 u32 excessive_collisions;
496 u32 tx_underruns;
497 u32 excessive_underruns;
498 } pktStats;
499 int txRingMask; /* TX ring mask */
500 int rxRingMask; /* RX ring mask */
501 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
502 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
503 };
504
505 /*
506 ** The transmit ring full condition is described by the tx_old and tx_new
507 ** pointers by:
508 ** tx_old = tx_new Empty ring
509 ** tx_old = tx_new+1 Full ring
510 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
511 */
512 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
513 lp->tx_old+lp->txRingMask-lp->tx_new:\
514 lp->tx_old -lp->tx_new-1)
515
516 /*
517 ** Public Functions
518 */
519 static int depca_open(struct net_device *dev);
520 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
521 static irqreturn_t depca_interrupt(int irq, void *dev_id);
522 static int depca_close(struct net_device *dev);
523 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524 static void depca_tx_timeout(struct net_device *dev);
525 static struct net_device_stats *depca_get_stats(struct net_device *dev);
526 static void set_multicast_list(struct net_device *dev);
527
528 /*
529 ** Private functions
530 */
531 static void depca_init_ring(struct net_device *dev);
532 static int depca_rx(struct net_device *dev);
533 static int depca_tx(struct net_device *dev);
534
535 static void LoadCSRs(struct net_device *dev);
536 static int InitRestartDepca(struct net_device *dev);
537 static int DepcaSignature(char *name, u_long paddr);
538 static int DevicePresent(u_long ioaddr);
539 static int get_hw_addr(struct net_device *dev);
540 static void SetMulticastFilter(struct net_device *dev);
541 static int load_packet(struct net_device *dev, struct sk_buff *skb);
542 static void depca_dbg_open(struct net_device *dev);
543
544 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
545 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
546 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
547 static u_char *depca_irq;
548
549 static int irq;
550 static int io;
551 static char *adapter_name;
552 static int mem; /* For loadable module assignment
553 use insmod mem=0x????? .... */
554 module_param (irq, int, 0);
555 module_param (io, int, 0);
556 module_param (adapter_name, charp, 0);
557 module_param (mem, int, 0);
558 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
559 MODULE_PARM_DESC(io, "DEPCA I/O base address");
560 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
561 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
562 MODULE_LICENSE("GPL");
563
564 /*
565 ** Miscellaneous defines...
566 */
567 #define STOP_DEPCA \
568 outw(CSR0, DEPCA_ADDR);\
569 outw(STOP, DEPCA_DATA)
570
571 static int __init depca_hw_init (struct net_device *dev, struct device *device)
572 {
573 struct depca_private *lp;
574 int i, j, offset, netRAM, mem_len, status = 0;
575 s16 nicsr;
576 u_long ioaddr;
577 u_long mem_start;
578
579 /*
580 * We are now supposed to enter this function with the
581 * following fields filled with proper values :
582 *
583 * dev->base_addr
584 * lp->mem_start
585 * lp->depca_bus
586 * lp->adapter
587 *
588 * dev->irq can be set if known from device configuration (on
589 * MCA or EISA) or module option. Otherwise, it will be auto
590 * detected.
591 */
592
593 ioaddr = dev->base_addr;
594
595 STOP_DEPCA;
596
597 nicsr = inb(DEPCA_NICSR);
598 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
599 outb(nicsr, DEPCA_NICSR);
600
601 if (inw(DEPCA_DATA) != STOP) {
602 return -ENXIO;
603 }
604
605 lp = (struct depca_private *) dev->priv;
606 mem_start = lp->mem_start;
607
608 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
609 return -ENXIO;
610
611 printk ("%s: %s at 0x%04lx",
612 device->bus_id, depca_signature[lp->adapter], ioaddr);
613
614 switch (lp->depca_bus) {
615 #ifdef CONFIG_MCA
616 case DEPCA_BUS_MCA:
617 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
618 break;
619 #endif
620
621 #ifdef CONFIG_EISA
622 case DEPCA_BUS_EISA:
623 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
624 break;
625 #endif
626
627 case DEPCA_BUS_ISA:
628 break;
629
630 default:
631 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
632 return -ENXIO;
633 }
634
635 printk(", h/w address ");
636 status = get_hw_addr(dev);
637 if (status != 0) {
638 printk(" which has an Ethernet PROM CRC error.\n");
639 return -ENXIO;
640 }
641 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
642 printk("%2.2x:", dev->dev_addr[i]);
643 }
644 printk("%2.2x", dev->dev_addr[i]);
645
646 /* Set up the maximum amount of network RAM(kB) */
647 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
648 if ((nicsr & _128KB) && (lp->adapter == de422))
649 netRAM = 128;
650
651 /* Shared Memory Base Address */
652 if (nicsr & BUF) {
653 nicsr &= ~BS; /* DEPCA RAM in top 32k */
654 netRAM -= 32;
655
656 /* Only EISA/ISA needs start address to be re-computed */
657 if (lp->depca_bus != DEPCA_BUS_MCA)
658 mem_start += 0x8000;
659 }
660
661 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)))
662 > (netRAM << 10)) {
663 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
664 return -ENXIO;
665 }
666
667 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
668
669 /* Enable the shadow RAM. */
670 if (lp->adapter != DEPCA) {
671 nicsr |= SHE;
672 outb(nicsr, DEPCA_NICSR);
673 }
674
675 spin_lock_init(&lp->lock);
676 sprintf(lp->adapter_name, "%s (%s)",
677 depca_signature[lp->adapter], device->bus_id);
678 status = -EBUSY;
679
680 /* Initialisation Block */
681 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
682 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
683 goto out_priv;
684 }
685
686 status = -EIO;
687 lp->sh_mem = ioremap(mem_start, mem_len);
688 if (lp->sh_mem == NULL) {
689 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
690 goto out1;
691 }
692
693 lp->mem_start = mem_start;
694 lp->mem_len = mem_len;
695 lp->device_ram_start = mem_start & LA_MASK;
696
697 offset = 0;
698 offset += sizeof(struct depca_init);
699
700 /* Tx & Rx descriptors (aligned to a quadword boundary) */
701 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
702 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
703 lp->rx_ring_offset = offset;
704
705 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
706 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
707 lp->tx_ring_offset = offset;
708
709 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
710
711 lp->buffs_offset = offset;
712
713 /* Finish initialising the ring information. */
714 lp->rxRingMask = NUM_RX_DESC - 1;
715 lp->txRingMask = NUM_TX_DESC - 1;
716
717 /* Calculate Tx/Rx RLEN size for the descriptors. */
718 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
719 j >>= 1;
720 }
721 lp->rx_rlen = (s32) (i << 29);
722 for (i = 0, j = lp->txRingMask; j > 0; i++) {
723 j >>= 1;
724 }
725 lp->tx_rlen = (s32) (i << 29);
726
727 /* Load the initialisation block */
728 depca_init_ring(dev);
729
730 /* Initialise the control and status registers */
731 LoadCSRs(dev);
732
733 /* Enable DEPCA board interrupts for autoprobing */
734 nicsr = ((nicsr & ~IM) | IEN);
735 outb(nicsr, DEPCA_NICSR);
736
737 /* To auto-IRQ we enable the initialization-done and DMA err,
738 interrupts. For now we will always get a DMA error. */
739 if (dev->irq < 2) {
740 unsigned char irqnum;
741 unsigned long irq_mask, delay;
742
743 irq_mask = probe_irq_on();
744
745 /* Assign the correct irq list */
746 switch (lp->adapter) {
747 case DEPCA:
748 case de100:
749 case de101:
750 depca_irq = de1xx_irq;
751 break;
752 case de200:
753 case de201:
754 case de202:
755 case de210:
756 case de212:
757 depca_irq = de2xx_irq;
758 break;
759 case de422:
760 depca_irq = de422_irq;
761 break;
762
763 default:
764 break; /* Not reached */
765 }
766
767 /* Trigger an initialization just for the interrupt. */
768 outw(INEA | INIT, DEPCA_DATA);
769
770 delay = jiffies + HZ/50;
771 while (time_before(jiffies, delay))
772 yield();
773
774 irqnum = probe_irq_off(irq_mask);
775
776 status = -ENXIO;
777 if (!irqnum) {
778 printk(" and failed to detect IRQ line.\n");
779 goto out2;
780 } else {
781 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
782 if (irqnum == depca_irq[i]) {
783 dev->irq = irqnum;
784 printk(" and uses IRQ%d.\n", dev->irq);
785 }
786
787 if (!dev->irq) {
788 printk(" but incorrect IRQ line detected.\n");
789 goto out2;
790 }
791 }
792 } else {
793 printk(" and assigned IRQ%d.\n", dev->irq);
794 }
795
796 if (depca_debug > 1) {
797 printk(version);
798 }
799
800 /* The DEPCA-specific entries in the device structure. */
801 dev->open = &depca_open;
802 dev->hard_start_xmit = &depca_start_xmit;
803 dev->stop = &depca_close;
804 dev->get_stats = &depca_get_stats;
805 dev->set_multicast_list = &set_multicast_list;
806 dev->do_ioctl = &depca_ioctl;
807 dev->tx_timeout = depca_tx_timeout;
808 dev->watchdog_timeo = TX_TIMEOUT;
809
810 dev->mem_start = 0;
811
812 device->driver_data = dev;
813 SET_NETDEV_DEV (dev, device);
814
815 status = register_netdev(dev);
816 if (status == 0)
817 return 0;
818 out2:
819 iounmap(lp->sh_mem);
820 out1:
821 release_mem_region (mem_start, mem_len);
822 out_priv:
823 return status;
824 }
825
826
827 static int depca_open(struct net_device *dev)
828 {
829 struct depca_private *lp = (struct depca_private *) dev->priv;
830 u_long ioaddr = dev->base_addr;
831 s16 nicsr;
832 int status = 0;
833
834 STOP_DEPCA;
835 nicsr = inb(DEPCA_NICSR);
836
837 /* Make sure the shadow RAM is enabled */
838 if (lp->adapter != DEPCA) {
839 nicsr |= SHE;
840 outb(nicsr, DEPCA_NICSR);
841 }
842
843 /* Re-initialize the DEPCA... */
844 depca_init_ring(dev);
845 LoadCSRs(dev);
846
847 depca_dbg_open(dev);
848
849 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
850 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
851 status = -EAGAIN;
852 } else {
853
854 /* Enable DEPCA board interrupts and turn off LED */
855 nicsr = ((nicsr & ~IM & ~LED) | IEN);
856 outb(nicsr, DEPCA_NICSR);
857 outw(CSR0, DEPCA_ADDR);
858
859 netif_start_queue(dev);
860
861 status = InitRestartDepca(dev);
862
863 if (depca_debug > 1) {
864 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
865 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
866 }
867 }
868 return status;
869 }
870
871 /* Initialize the lance Rx and Tx descriptor rings. */
872 static void depca_init_ring(struct net_device *dev)
873 {
874 struct depca_private *lp = (struct depca_private *) dev->priv;
875 u_int i;
876 u_long offset;
877
878 /* Lock out other processes whilst setting up the hardware */
879 netif_stop_queue(dev);
880
881 lp->rx_new = lp->tx_new = 0;
882 lp->rx_old = lp->tx_old = 0;
883
884 /* Initialize the base address and length of each buffer in the ring */
885 for (i = 0; i <= lp->rxRingMask; i++) {
886 offset = lp->buffs_offset + i * RX_BUFF_SZ;
887 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
888 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
889 lp->rx_buff[i] = lp->sh_mem + offset;
890 }
891
892 for (i = 0; i <= lp->txRingMask; i++) {
893 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
894 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
895 lp->tx_buff[i] = lp->sh_mem + offset;
896 }
897
898 /* Set up the initialization block */
899 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
900 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
901
902 SetMulticastFilter(dev);
903
904 for (i = 0; i < ETH_ALEN; i++) {
905 lp->init_block.phys_addr[i] = dev->dev_addr[i];
906 }
907
908 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
909 }
910
911
912 static void depca_tx_timeout(struct net_device *dev)
913 {
914 u_long ioaddr = dev->base_addr;
915
916 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
917
918 STOP_DEPCA;
919 depca_init_ring(dev);
920 LoadCSRs(dev);
921 dev->trans_start = jiffies;
922 netif_wake_queue(dev);
923 InitRestartDepca(dev);
924 }
925
926
927 /*
928 ** Writes a socket buffer to TX descriptor ring and starts transmission
929 */
930 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
931 {
932 struct depca_private *lp = (struct depca_private *) dev->priv;
933 u_long ioaddr = dev->base_addr;
934 int status = 0;
935
936 /* Transmitter timeout, serious problems. */
937 if (skb->len < 1)
938 goto out;
939
940 if (skb_padto(skb, ETH_ZLEN))
941 goto out;
942
943 netif_stop_queue(dev);
944
945 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
946 status = load_packet(dev, skb);
947
948 if (!status) {
949 /* Trigger an immediate send demand. */
950 outw(CSR0, DEPCA_ADDR);
951 outw(INEA | TDMD, DEPCA_DATA);
952
953 dev->trans_start = jiffies;
954 dev_kfree_skb(skb);
955 }
956 if (TX_BUFFS_AVAIL)
957 netif_start_queue(dev);
958 } else
959 status = -1;
960
961 out:
962 return status;
963 }
964
965 /*
966 ** The DEPCA interrupt handler.
967 */
968 static irqreturn_t depca_interrupt(int irq, void *dev_id)
969 {
970 struct net_device *dev = dev_id;
971 struct depca_private *lp;
972 s16 csr0, nicsr;
973 u_long ioaddr;
974
975 if (dev == NULL) {
976 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
977 return IRQ_NONE;
978 }
979
980 lp = (struct depca_private *) dev->priv;
981 ioaddr = dev->base_addr;
982
983 spin_lock(&lp->lock);
984
985 /* mask the DEPCA board interrupts and turn on the LED */
986 nicsr = inb(DEPCA_NICSR);
987 nicsr |= (IM | LED);
988 outb(nicsr, DEPCA_NICSR);
989
990 outw(CSR0, DEPCA_ADDR);
991 csr0 = inw(DEPCA_DATA);
992
993 /* Acknowledge all of the current interrupt sources ASAP. */
994 outw(csr0 & INTE, DEPCA_DATA);
995
996 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
997 depca_rx(dev);
998
999 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1000 depca_tx(dev);
1001
1002 /* Any resources available? */
1003 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1004 netif_wake_queue(dev);
1005 }
1006
1007 /* Unmask the DEPCA board interrupts and turn off the LED */
1008 nicsr = (nicsr & ~IM & ~LED);
1009 outb(nicsr, DEPCA_NICSR);
1010
1011 spin_unlock(&lp->lock);
1012 return IRQ_HANDLED;
1013 }
1014
1015 /* Called with lp->lock held */
1016 static int depca_rx(struct net_device *dev)
1017 {
1018 struct depca_private *lp = (struct depca_private *) dev->priv;
1019 int i, entry;
1020 s32 status;
1021
1022 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1023 status = readl(&lp->rx_ring[entry].base) >> 16;
1024 if (status & R_STP) { /* Remember start of frame */
1025 lp->rx_old = entry;
1026 }
1027 if (status & R_ENP) { /* Valid frame status */
1028 if (status & R_ERR) { /* There was an error. */
1029 lp->stats.rx_errors++; /* Update the error stats. */
1030 if (status & R_FRAM)
1031 lp->stats.rx_frame_errors++;
1032 if (status & R_OFLO)
1033 lp->stats.rx_over_errors++;
1034 if (status & R_CRC)
1035 lp->stats.rx_crc_errors++;
1036 if (status & R_BUFF)
1037 lp->stats.rx_fifo_errors++;
1038 } else {
1039 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1040 struct sk_buff *skb;
1041
1042 skb = dev_alloc_skb(pkt_len + 2);
1043 if (skb != NULL) {
1044 unsigned char *buf;
1045 skb_reserve(skb, 2); /* 16 byte align the IP header */
1046 buf = skb_put(skb, pkt_len);
1047 skb->dev = dev;
1048 if (entry < lp->rx_old) { /* Wrapped buffer */
1049 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1050 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1051 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1052 } else { /* Linear buffer */
1053 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1054 }
1055
1056 /*
1057 ** Notify the upper protocol layers that there is another
1058 ** packet to handle
1059 */
1060 skb->protocol = eth_type_trans(skb, dev);
1061 netif_rx(skb);
1062
1063 /*
1064 ** Update stats
1065 */
1066 dev->last_rx = jiffies;
1067 lp->stats.rx_packets++;
1068 lp->stats.rx_bytes += pkt_len;
1069 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1070 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1071 lp->pktStats.bins[i]++;
1072 i = DEPCA_PKT_STAT_SZ;
1073 }
1074 }
1075 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1076 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1077 lp->pktStats.broadcast++;
1078 } else {
1079 lp->pktStats.multicast++;
1080 }
1081 } 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])) {
1082 lp->pktStats.unicast++;
1083 }
1084
1085 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1086 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1087 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1088 }
1089 } else {
1090 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1091 lp->stats.rx_dropped++; /* Really, deferred. */
1092 break;
1093 }
1094 }
1095 /* Change buffer ownership for this last frame, back to the adapter */
1096 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1097 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1098 }
1099 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1100 }
1101
1102 /*
1103 ** Update entry information
1104 */
1105 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1106 }
1107
1108 return 0;
1109 }
1110
1111 /*
1112 ** Buffer sent - check for buffer errors.
1113 ** Called with lp->lock held
1114 */
1115 static int depca_tx(struct net_device *dev)
1116 {
1117 struct depca_private *lp = (struct depca_private *) dev->priv;
1118 int entry;
1119 s32 status;
1120 u_long ioaddr = dev->base_addr;
1121
1122 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1123 status = readl(&lp->tx_ring[entry].base) >> 16;
1124
1125 if (status < 0) { /* Packet not yet sent! */
1126 break;
1127 } else if (status & T_ERR) { /* An error occurred. */
1128 status = readl(&lp->tx_ring[entry].misc);
1129 lp->stats.tx_errors++;
1130 if (status & TMD3_RTRY)
1131 lp->stats.tx_aborted_errors++;
1132 if (status & TMD3_LCAR)
1133 lp->stats.tx_carrier_errors++;
1134 if (status & TMD3_LCOL)
1135 lp->stats.tx_window_errors++;
1136 if (status & TMD3_UFLO)
1137 lp->stats.tx_fifo_errors++;
1138 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1139 /* Trigger an immediate send demand. */
1140 outw(CSR0, DEPCA_ADDR);
1141 outw(INEA | TDMD, DEPCA_DATA);
1142 }
1143 } else if (status & (T_MORE | T_ONE)) {
1144 lp->stats.collisions++;
1145 } else {
1146 lp->stats.tx_packets++;
1147 }
1148
1149 /* Update all the pointers */
1150 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1151 }
1152
1153 return 0;
1154 }
1155
1156 static int depca_close(struct net_device *dev)
1157 {
1158 struct depca_private *lp = (struct depca_private *) dev->priv;
1159 s16 nicsr;
1160 u_long ioaddr = dev->base_addr;
1161
1162 netif_stop_queue(dev);
1163
1164 outw(CSR0, DEPCA_ADDR);
1165
1166 if (depca_debug > 1) {
1167 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1168 }
1169
1170 /*
1171 ** We stop the DEPCA here -- it occasionally polls
1172 ** memory if we don't.
1173 */
1174 outw(STOP, DEPCA_DATA);
1175
1176 /*
1177 ** Give back the ROM in case the user wants to go to DOS
1178 */
1179 if (lp->adapter != DEPCA) {
1180 nicsr = inb(DEPCA_NICSR);
1181 nicsr &= ~SHE;
1182 outb(nicsr, DEPCA_NICSR);
1183 }
1184
1185 /*
1186 ** Free the associated irq
1187 */
1188 free_irq(dev->irq, dev);
1189 return 0;
1190 }
1191
1192 static void LoadCSRs(struct net_device *dev)
1193 {
1194 struct depca_private *lp = (struct depca_private *) dev->priv;
1195 u_long ioaddr = dev->base_addr;
1196
1197 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1198 outw((u16) lp->device_ram_start, DEPCA_DATA);
1199 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1200 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1201 outw(CSR3, DEPCA_ADDR); /* ALE control */
1202 outw(ACON, DEPCA_DATA);
1203
1204 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1205
1206 return;
1207 }
1208
1209 static int InitRestartDepca(struct net_device *dev)
1210 {
1211 struct depca_private *lp = (struct depca_private *) dev->priv;
1212 u_long ioaddr = dev->base_addr;
1213 int i, status = 0;
1214
1215 /* Copy the shadow init_block to shared memory */
1216 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1217
1218 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1219 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1220
1221 /* wait for lance to complete initialisation */
1222 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1223
1224 if (i != 100) {
1225 /* clear IDON by writing a "1", enable interrupts and start lance */
1226 outw(IDON | INEA | STRT, DEPCA_DATA);
1227 if (depca_debug > 2) {
1228 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1229 }
1230 } else {
1231 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1232 status = -1;
1233 }
1234
1235 return status;
1236 }
1237
1238 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1239 {
1240 struct depca_private *lp = (struct depca_private *) dev->priv;
1241
1242 /* Null body since there is no framing error counter */
1243
1244 return &lp->stats;
1245 }
1246
1247 /*
1248 ** Set or clear the multicast filter for this adaptor.
1249 */
1250 static void set_multicast_list(struct net_device *dev)
1251 {
1252 struct depca_private *lp = (struct depca_private *) dev->priv;
1253 u_long ioaddr = dev->base_addr;
1254
1255 netif_stop_queue(dev);
1256 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1257
1258 STOP_DEPCA; /* Temporarily stop the depca. */
1259 depca_init_ring(dev); /* Initialize the descriptor rings */
1260
1261 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1262 lp->init_block.mode |= PROM;
1263 } else {
1264 SetMulticastFilter(dev);
1265 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1266 }
1267
1268 LoadCSRs(dev); /* Reload CSR3 */
1269 InitRestartDepca(dev); /* Resume normal operation. */
1270 netif_start_queue(dev); /* Unlock the TX ring */
1271 }
1272
1273 /*
1274 ** Calculate the hash code and update the logical address filter
1275 ** from a list of ethernet multicast addresses.
1276 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1277 ** LANCE calculates its hash codes big endian.
1278 */
1279 static void SetMulticastFilter(struct net_device *dev)
1280 {
1281 struct depca_private *lp = (struct depca_private *) dev->priv;
1282 struct dev_mc_list *dmi = dev->mc_list;
1283 char *addrs;
1284 int i, j, bit, byte;
1285 u16 hashcode;
1286 u32 crc;
1287
1288 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1289 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1290 lp->init_block.mcast_table[i] = (char) 0xff;
1291 }
1292 } else {
1293 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1294 lp->init_block.mcast_table[i] = 0;
1295 }
1296 /* Add multicast addresses */
1297 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1298 addrs = dmi->dmi_addr;
1299 dmi = dmi->next;
1300 if ((*addrs & 0x01) == 1) { /* multicast address? */
1301 crc = ether_crc(ETH_ALEN, addrs);
1302 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1303 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1304 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1305 }
1306
1307
1308 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1309 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1310 lp->init_block.mcast_table[byte] |= bit;
1311 }
1312 }
1313 }
1314
1315 return;
1316 }
1317
1318 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1319 {
1320 int status = 0;
1321
1322 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1323 status = -EBUSY;
1324 goto out;
1325 }
1326
1327 if (DevicePresent(ioaddr)) {
1328 status = -ENODEV;
1329 goto out_release;
1330 }
1331
1332 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1333 status = -ENOMEM;
1334 goto out_release;
1335 }
1336
1337 return 0;
1338
1339 out_release:
1340 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1341 out:
1342 return status;
1343 }
1344
1345 #ifdef CONFIG_MCA
1346 /*
1347 ** Microchannel bus I/O device probe
1348 */
1349 static int __init depca_mca_probe(struct device *device)
1350 {
1351 unsigned char pos[2];
1352 unsigned char where;
1353 unsigned long iobase, mem_start;
1354 int irq, err;
1355 struct mca_device *mdev = to_mca_device (device);
1356 struct net_device *dev;
1357 struct depca_private *lp;
1358
1359 /*
1360 ** Search for the adapter. If an address has been given, search
1361 ** specifically for the card at that address. Otherwise find the
1362 ** first card in the system.
1363 */
1364
1365 pos[0] = mca_device_read_stored_pos(mdev, 2);
1366 pos[1] = mca_device_read_stored_pos(mdev, 3);
1367
1368 /*
1369 ** IO of card is handled by bits 1 and 2 of pos0.
1370 **
1371 ** bit2 bit1 IO
1372 ** 0 0 0x2c00
1373 ** 0 1 0x2c10
1374 ** 1 0 0x2c20
1375 ** 1 1 0x2c30
1376 */
1377 where = (pos[0] & 6) >> 1;
1378 iobase = 0x2c00 + (0x10 * where);
1379
1380 /*
1381 ** Found the adapter we were looking for. Now start setting it up.
1382 **
1383 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1384 ** of pos1. Bits are as follows (from the ADF file):
1385 **
1386 ** Bits
1387 ** 3 2 1 0 IRQ
1388 ** --------------------
1389 ** 0 0 1 0 5
1390 ** 0 0 0 1 9
1391 ** 0 1 0 0 10
1392 ** 1 0 0 0 11
1393 */
1394 where = pos[1] & 0x0f;
1395 switch (where) {
1396 case 1:
1397 irq = 9;
1398 break;
1399 case 2:
1400 irq = 5;
1401 break;
1402 case 4:
1403 irq = 10;
1404 break;
1405 case 8:
1406 irq = 11;
1407 break;
1408 default:
1409 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1410 return -EINVAL;
1411 }
1412
1413 /*
1414 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1415 ** They are mapped as follows:
1416 **
1417 ** Bit
1418 ** 5 4 3 Memory Addresses
1419 ** 0 0 0 C0000-CFFFF (64K)
1420 ** 1 0 0 C8000-CFFFF (32K)
1421 ** 0 0 1 D0000-DFFFF (64K)
1422 ** 1 0 1 D8000-DFFFF (32K)
1423 ** 0 1 0 E0000-EFFFF (64K)
1424 ** 1 1 0 E8000-EFFFF (32K)
1425 */
1426 where = (pos[0] & 0x18) >> 3;
1427 mem_start = 0xc0000 + (where * 0x10000);
1428 if (pos[0] & 0x20) {
1429 mem_start += 0x8000;
1430 }
1431
1432 /* claim the slot */
1433 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1434 sizeof(mdev->name));
1435 mca_device_set_claim(mdev, 1);
1436
1437 /*
1438 ** Get everything allocated and initialized... (almost just
1439 ** like the ISA and EISA probes)
1440 */
1441 irq = mca_device_transform_irq(mdev, irq);
1442 iobase = mca_device_transform_ioport(mdev, iobase);
1443
1444 if ((err = depca_common_init (iobase, &dev)))
1445 goto out_unclaim;
1446
1447 dev->irq = irq;
1448 dev->base_addr = iobase;
1449 lp = dev->priv;
1450 lp->depca_bus = DEPCA_BUS_MCA;
1451 lp->adapter = depca_mca_adapter_type[mdev->index];
1452 lp->mem_start = mem_start;
1453
1454 if ((err = depca_hw_init(dev, device)))
1455 goto out_free;
1456
1457 return 0;
1458
1459 out_free:
1460 free_netdev (dev);
1461 release_region (iobase, DEPCA_TOTAL_SIZE);
1462 out_unclaim:
1463 mca_device_set_claim(mdev, 0);
1464
1465 return err;
1466 }
1467 #endif
1468
1469 /*
1470 ** ISA bus I/O device probe
1471 */
1472
1473 static void __init depca_platform_probe (void)
1474 {
1475 int i;
1476 struct platform_device *pldev;
1477
1478 for (i = 0; depca_io_ports[i].iobase; i++) {
1479 depca_io_ports[i].device = NULL;
1480
1481 /* if an address has been specified on the command
1482 * line, use it (if valid) */
1483 if (io && io != depca_io_ports[i].iobase)
1484 continue;
1485
1486 pldev = platform_device_alloc(depca_string, i);
1487 if (!pldev)
1488 continue;
1489
1490 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1491 depca_io_ports[i].device = pldev;
1492
1493 if (platform_device_add(pldev)) {
1494 platform_device_put(pldev);
1495 depca_io_ports[i].device = NULL;
1496 continue;
1497 }
1498
1499 if (!pldev->dev.driver) {
1500 /* The driver was not bound to this device, there was
1501 * no hardware at this address. Unregister it, as the
1502 * release fuction will take care of freeing the
1503 * allocated structure */
1504
1505 depca_io_ports[i].device = NULL;
1506 pldev->dev.platform_data = NULL;
1507 platform_device_unregister (pldev);
1508 }
1509 }
1510 }
1511
1512 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1513 {
1514 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1515 enum depca_type adapter = unknown;
1516 int i;
1517
1518 for (i = 0; mem_base[i]; i++) {
1519 *mem_start = mem ? mem : mem_base[i];
1520 adapter = DepcaSignature (adapter_name, *mem_start);
1521 if (adapter != unknown)
1522 break;
1523 }
1524
1525 return adapter;
1526 }
1527
1528 static int __init depca_isa_probe (struct platform_device *device)
1529 {
1530 struct net_device *dev;
1531 struct depca_private *lp;
1532 u_long ioaddr, mem_start = 0;
1533 enum depca_type adapter = unknown;
1534 int status = 0;
1535
1536 ioaddr = (u_long) device->dev.platform_data;
1537
1538 if ((status = depca_common_init (ioaddr, &dev)))
1539 goto out;
1540
1541 adapter = depca_shmem_probe (&mem_start);
1542
1543 if (adapter == unknown) {
1544 status = -ENODEV;
1545 goto out_free;
1546 }
1547
1548 dev->base_addr = ioaddr;
1549 dev->irq = irq; /* Use whatever value the user gave
1550 * us, and 0 if he didn't. */
1551 lp = dev->priv;
1552 lp->depca_bus = DEPCA_BUS_ISA;
1553 lp->adapter = adapter;
1554 lp->mem_start = mem_start;
1555
1556 if ((status = depca_hw_init(dev, &device->dev)))
1557 goto out_free;
1558
1559 return 0;
1560
1561 out_free:
1562 free_netdev (dev);
1563 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1564 out:
1565 return status;
1566 }
1567
1568 /*
1569 ** EISA callbacks from sysfs.
1570 */
1571
1572 #ifdef CONFIG_EISA
1573 static int __init depca_eisa_probe (struct device *device)
1574 {
1575 struct eisa_device *edev;
1576 struct net_device *dev;
1577 struct depca_private *lp;
1578 u_long ioaddr, mem_start;
1579 int status = 0;
1580
1581 edev = to_eisa_device (device);
1582 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1583
1584 if ((status = depca_common_init (ioaddr, &dev)))
1585 goto out;
1586
1587 /* It would have been nice to get card configuration from the
1588 * card. Unfortunately, this register is write-only (shares
1589 * it's address with the ethernet prom)... As we don't parse
1590 * the EISA configuration structures (yet... :-), just rely on
1591 * the ISA probing to sort it out... */
1592
1593 depca_shmem_probe (&mem_start);
1594
1595 dev->base_addr = ioaddr;
1596 dev->irq = irq;
1597 lp = dev->priv;
1598 lp->depca_bus = DEPCA_BUS_EISA;
1599 lp->adapter = edev->id.driver_data;
1600 lp->mem_start = mem_start;
1601
1602 if ((status = depca_hw_init(dev, device)))
1603 goto out_free;
1604
1605 return 0;
1606
1607 out_free:
1608 free_netdev (dev);
1609 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1610 out:
1611 return status;
1612 }
1613 #endif
1614
1615 static int __devexit depca_device_remove (struct device *device)
1616 {
1617 struct net_device *dev;
1618 struct depca_private *lp;
1619 int bus;
1620
1621 dev = device->driver_data;
1622 lp = dev->priv;
1623
1624 unregister_netdev (dev);
1625 iounmap (lp->sh_mem);
1626 release_mem_region (lp->mem_start, lp->mem_len);
1627 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1628 bus = lp->depca_bus;
1629 free_netdev (dev);
1630
1631 return 0;
1632 }
1633
1634 /*
1635 ** Look for a particular board name in the on-board Remote Diagnostics
1636 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1637 ** base address.
1638 */
1639 static int __init DepcaSignature(char *name, u_long base_addr)
1640 {
1641 u_int i, j, k;
1642 void __iomem *ptr;
1643 char tmpstr[16];
1644 u_long prom_addr = base_addr + 0xc000;
1645 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1646
1647 /* Can't reserve the prom region, it is already marked as
1648 * used, at least on x86. Instead, reserve a memory region a
1649 * board would certainly use. If it works, go ahead. If not,
1650 * run like hell... */
1651
1652 if (!request_mem_region (mem_addr, 16, depca_string))
1653 return unknown;
1654
1655 /* Copy the first 16 bytes of ROM */
1656
1657 ptr = ioremap(prom_addr, 16);
1658 if (ptr == NULL) {
1659 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1660 return unknown;
1661 }
1662 for (i = 0; i < 16; i++) {
1663 tmpstr[i] = readb(ptr + i);
1664 }
1665 iounmap(ptr);
1666
1667 release_mem_region (mem_addr, 16);
1668
1669 /* Check if PROM contains a valid string */
1670 for (i = 0; *depca_signature[i] != '\0'; i++) {
1671 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1672 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1673 k++;
1674 } else { /* lost signature; begin search again */
1675 k = 0;
1676 }
1677 }
1678 if (k == strlen(depca_signature[i]))
1679 break;
1680 }
1681
1682 /* Check if name string is valid, provided there's no PROM */
1683 if (name && *name && (i == unknown)) {
1684 for (i = 0; *depca_signature[i] != '\0'; i++) {
1685 if (strcmp(name, depca_signature[i]) == 0)
1686 break;
1687 }
1688 }
1689
1690 return i;
1691 }
1692
1693 /*
1694 ** Look for a special sequence in the Ethernet station address PROM that
1695 ** is common across all DEPCA products. Note that the original DEPCA needs
1696 ** its ROM address counter to be initialized and enabled. Only enable
1697 ** if the first address octet is a 0x08 - this minimises the chances of
1698 ** messing around with some other hardware, but it assumes that this DEPCA
1699 ** card initialized itself correctly.
1700 **
1701 ** Search the Ethernet address ROM for the signature. Since the ROM address
1702 ** counter can start at an arbitrary point, the search must include the entire
1703 ** probe sequence length plus the (length_of_the_signature - 1).
1704 ** Stop the search IMMEDIATELY after the signature is found so that the
1705 ** PROM address counter is correctly positioned at the start of the
1706 ** ethernet address for later read out.
1707 */
1708 static int __init DevicePresent(u_long ioaddr)
1709 {
1710 union {
1711 struct {
1712 u32 a;
1713 u32 b;
1714 } llsig;
1715 char Sig[sizeof(u32) << 1];
1716 }
1717 dev;
1718 short sigLength = 0;
1719 s8 data;
1720 s16 nicsr;
1721 int i, j, status = 0;
1722
1723 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1724 data = inb(DEPCA_PROM); /* read data */
1725
1726 if (data == 0x08) { /* Enable counter on DEPCA */
1727 nicsr = inb(DEPCA_NICSR);
1728 nicsr |= AAC;
1729 outb(nicsr, DEPCA_NICSR);
1730 }
1731
1732 dev.llsig.a = ETH_PROM_SIG;
1733 dev.llsig.b = ETH_PROM_SIG;
1734 sigLength = sizeof(u32) << 1;
1735
1736 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1737 data = inb(DEPCA_PROM);
1738 if (dev.Sig[j] == data) { /* track signature */
1739 j++;
1740 } else { /* lost signature; begin search again */
1741 if (data == dev.Sig[0]) { /* rare case.... */
1742 j = 1;
1743 } else {
1744 j = 0;
1745 }
1746 }
1747 }
1748
1749 if (j != sigLength) {
1750 status = -ENODEV; /* search failed */
1751 }
1752
1753 return status;
1754 }
1755
1756 /*
1757 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1758 ** reason: access the upper half of the PROM with x=0; access the lower half
1759 ** with x=1.
1760 */
1761 static int __init get_hw_addr(struct net_device *dev)
1762 {
1763 u_long ioaddr = dev->base_addr;
1764 struct depca_private *lp = dev->priv;
1765 int i, k, tmp, status = 0;
1766 u_short j, x, chksum;
1767
1768 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1769
1770 for (i = 0, k = 0, j = 0; j < 3; j++) {
1771 k <<= 1;
1772 if (k > 0xffff)
1773 k -= 0xffff;
1774
1775 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1776 dev->dev_addr[i++] = (u_char) tmp;
1777 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1778 dev->dev_addr[i++] = (u_char) tmp;
1779
1780 if (k > 0xffff)
1781 k -= 0xffff;
1782 }
1783 if (k == 0xffff)
1784 k = 0;
1785
1786 chksum = (u_char) inb(DEPCA_PROM + x);
1787 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1788 if (k != chksum)
1789 status = -1;
1790
1791 return status;
1792 }
1793
1794 /*
1795 ** Load a packet into the shared memory
1796 */
1797 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1798 {
1799 struct depca_private *lp = (struct depca_private *) dev->priv;
1800 int i, entry, end, len, status = 0;
1801
1802 entry = lp->tx_new; /* Ring around buffer number. */
1803 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1804 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1805 /*
1806 ** Caution: the write order is important here... don't set up the
1807 ** ownership rights until all the other information is in place.
1808 */
1809 if (end < entry) { /* wrapped buffer */
1810 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1811 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1812 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1813 } else { /* linear buffer */
1814 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1815 }
1816
1817 /* set up the buffer descriptors */
1818 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1819 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1820 /* clean out flags */
1821 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1822 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1823 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1824 len -= TX_BUFF_SZ;
1825 }
1826 /* clean out flags */
1827 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1828 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1829 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1830
1831 /* start of packet */
1832 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1833 /* end of packet */
1834 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1835
1836 for (i = end; i != entry; --i) {
1837 /* ownership of packet */
1838 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1839 if (i == 0)
1840 i = lp->txRingMask + 1;
1841 }
1842 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1843
1844 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1845 } else {
1846 status = -1;
1847 }
1848
1849 return status;
1850 }
1851
1852 static void depca_dbg_open(struct net_device *dev)
1853 {
1854 struct depca_private *lp = (struct depca_private *) dev->priv;
1855 u_long ioaddr = dev->base_addr;
1856 struct depca_init *p = &lp->init_block;
1857 int i;
1858
1859 if (depca_debug > 1) {
1860 /* Do not copy the shadow init block into shared memory */
1861 /* Debugging should not affect normal operation! */
1862 /* The shadow init block will get copied across during InitRestartDepca */
1863 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1864 printk("Descriptor head addresses (CPU):\n");
1865 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1866 printk("Descriptor addresses (CPU):\nRX: ");
1867 for (i = 0; i < lp->rxRingMask; i++) {
1868 if (i < 3) {
1869 printk("%p ", &lp->rx_ring[i].base);
1870 }
1871 }
1872 printk("...%p\n", &lp->rx_ring[i].base);
1873 printk("TX: ");
1874 for (i = 0; i < lp->txRingMask; i++) {
1875 if (i < 3) {
1876 printk("%p ", &lp->tx_ring[i].base);
1877 }
1878 }
1879 printk("...%p\n", &lp->tx_ring[i].base);
1880 printk("\nDescriptor buffers (Device):\nRX: ");
1881 for (i = 0; i < lp->rxRingMask; i++) {
1882 if (i < 3) {
1883 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1884 }
1885 }
1886 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1887 printk("TX: ");
1888 for (i = 0; i < lp->txRingMask; i++) {
1889 if (i < 3) {
1890 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1891 }
1892 }
1893 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1894 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1895 printk(" mode: 0x%4.4x\n", p->mode);
1896 printk(" physical address: ");
1897 for (i = 0; i < ETH_ALEN - 1; i++) {
1898 printk("%2.2x:", p->phys_addr[i]);
1899 }
1900 printk("%2.2x\n", p->phys_addr[i]);
1901 printk(" multicast hash table: ");
1902 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1903 printk("%2.2x:", p->mcast_table[i]);
1904 }
1905 printk("%2.2x\n", p->mcast_table[i]);
1906 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1907 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1908 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1909 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1910 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1911 outw(CSR2, DEPCA_ADDR);
1912 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1913 outw(CSR1, DEPCA_ADDR);
1914 printk("%4.4x\n", inw(DEPCA_DATA));
1915 outw(CSR3, DEPCA_ADDR);
1916 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1917 }
1918
1919 return;
1920 }
1921
1922 /*
1923 ** Perform IOCTL call functions here. Some are privileged operations and the
1924 ** effective uid is checked in those cases.
1925 ** All multicast IOCTLs will not work here and are for testing purposes only.
1926 */
1927 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1928 {
1929 struct depca_private *lp = (struct depca_private *) dev->priv;
1930 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1931 int i, status = 0;
1932 u_long ioaddr = dev->base_addr;
1933 union {
1934 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1935 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1936 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1937 } tmp;
1938 unsigned long flags;
1939 void *buf;
1940
1941 switch (ioc->cmd) {
1942 case DEPCA_GET_HWADDR: /* Get the hardware address */
1943 for (i = 0; i < ETH_ALEN; i++) {
1944 tmp.addr[i] = dev->dev_addr[i];
1945 }
1946 ioc->len = ETH_ALEN;
1947 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1948 return -EFAULT;
1949 break;
1950
1951 case DEPCA_SET_HWADDR: /* Set the hardware address */
1952 if (!capable(CAP_NET_ADMIN))
1953 return -EPERM;
1954 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1955 return -EFAULT;
1956 for (i = 0; i < ETH_ALEN; i++) {
1957 dev->dev_addr[i] = tmp.addr[i];
1958 }
1959 netif_stop_queue(dev);
1960 while (lp->tx_old != lp->tx_new)
1961 cpu_relax(); /* Wait for the ring to empty */
1962
1963 STOP_DEPCA; /* Temporarily stop the depca. */
1964 depca_init_ring(dev); /* Initialize the descriptor rings */
1965 LoadCSRs(dev); /* Reload CSR3 */
1966 InitRestartDepca(dev); /* Resume normal operation. */
1967 netif_start_queue(dev); /* Unlock the TX ring */
1968 break;
1969
1970 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1971 if (!capable(CAP_NET_ADMIN))
1972 return -EPERM;
1973 netif_stop_queue(dev);
1974 while (lp->tx_old != lp->tx_new)
1975 cpu_relax(); /* Wait for the ring to empty */
1976
1977 STOP_DEPCA; /* Temporarily stop the depca. */
1978 depca_init_ring(dev); /* Initialize the descriptor rings */
1979 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1980
1981 LoadCSRs(dev); /* Reload CSR3 */
1982 InitRestartDepca(dev); /* Resume normal operation. */
1983 netif_start_queue(dev); /* Unlock the TX ring */
1984 break;
1985
1986 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1987 if (!capable(CAP_NET_ADMIN))
1988 return -EPERM;
1989 netif_stop_queue(dev);
1990 while (lp->tx_old != lp->tx_new)
1991 cpu_relax(); /* Wait for the ring to empty */
1992
1993 STOP_DEPCA; /* Temporarily stop the depca. */
1994 depca_init_ring(dev); /* Initialize the descriptor rings */
1995 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1996
1997 LoadCSRs(dev); /* Reload CSR3 */
1998 InitRestartDepca(dev); /* Resume normal operation. */
1999 netif_start_queue(dev); /* Unlock the TX ring */
2000 break;
2001
2002 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2003 if(!capable(CAP_NET_ADMIN))
2004 return -EPERM;
2005 printk("%s: Boo!\n", dev->name);
2006 break;
2007
2008 case DEPCA_GET_MCA: /* Get the multicast address table */
2009 ioc->len = (HASH_TABLE_LEN >> 3);
2010 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2011 return -EFAULT;
2012 break;
2013
2014 case DEPCA_SET_MCA: /* Set a multicast address */
2015 if (!capable(CAP_NET_ADMIN))
2016 return -EPERM;
2017 if (ioc->len >= HASH_TABLE_LEN)
2018 return -EINVAL;
2019 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2020 return -EFAULT;
2021 set_multicast_list(dev);
2022 break;
2023
2024 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2025 if (!capable(CAP_NET_ADMIN))
2026 return -EPERM;
2027 set_multicast_list(dev);
2028 break;
2029
2030 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2031 if (!capable(CAP_NET_ADMIN))
2032 return -EPERM;
2033 set_multicast_list(dev);
2034 break;
2035
2036 case DEPCA_GET_STATS: /* Get the driver statistics */
2037 ioc->len = sizeof(lp->pktStats);
2038 buf = kmalloc(ioc->len, GFP_KERNEL);
2039 if(!buf)
2040 return -ENOMEM;
2041 spin_lock_irqsave(&lp->lock, flags);
2042 memcpy(buf, &lp->pktStats, ioc->len);
2043 spin_unlock_irqrestore(&lp->lock, flags);
2044 if (copy_to_user(ioc->data, buf, ioc->len))
2045 status = -EFAULT;
2046 kfree(buf);
2047 break;
2048
2049 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2050 if (!capable(CAP_NET_ADMIN))
2051 return -EPERM;
2052 spin_lock_irqsave(&lp->lock, flags);
2053 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2054 spin_unlock_irqrestore(&lp->lock, flags);
2055 break;
2056
2057 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2058 i = 0;
2059 tmp.sval[i++] = inw(DEPCA_NICSR);
2060 outw(CSR0, DEPCA_ADDR); /* status register */
2061 tmp.sval[i++] = inw(DEPCA_DATA);
2062 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2063 ioc->len = i + sizeof(struct depca_init);
2064 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2065 return -EFAULT;
2066 break;
2067
2068 default:
2069 return -EOPNOTSUPP;
2070 }
2071
2072 return status;
2073 }
2074
2075 static int __init depca_module_init (void)
2076 {
2077 int err = 0;
2078
2079 #ifdef CONFIG_MCA
2080 err = mca_register_driver (&depca_mca_driver);
2081 #endif
2082 #ifdef CONFIG_EISA
2083 err |= eisa_driver_register (&depca_eisa_driver);
2084 #endif
2085 err |= platform_driver_register (&depca_isa_driver);
2086 depca_platform_probe ();
2087
2088 return err;
2089 }
2090
2091 static void __exit depca_module_exit (void)
2092 {
2093 int i;
2094 #ifdef CONFIG_MCA
2095 mca_unregister_driver (&depca_mca_driver);
2096 #endif
2097 #ifdef CONFIG_EISA
2098 eisa_driver_unregister (&depca_eisa_driver);
2099 #endif
2100 platform_driver_unregister (&depca_isa_driver);
2101
2102 for (i = 0; depca_io_ports[i].iobase; i++) {
2103 if (depca_io_ports[i].device) {
2104 depca_io_ports[i].device->dev.platform_data = NULL;
2105 platform_device_unregister (depca_io_ports[i].device);
2106 depca_io_ports[i].device = NULL;
2107 }
2108 }
2109 }
2110
2111 module_init (depca_module_init);
2112 module_exit (depca_module_exit);
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