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drivers/net: Convert compare_ether_addr to ether_addr_equal
[deliverable/linux.git] / drivers / net / ethernet / amd / depca.c
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/sched.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/platform_device.h>
258 #include <linux/bitops.h>
259
260 #include <asm/uaccess.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 static struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
347 { "" }
348 };
349 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
350
351 static int depca_eisa_probe (struct device *device);
352
353 static struct eisa_driver depca_eisa_driver = {
354 .id_table = depca_eisa_ids,
355 .driver = {
356 .name = depca_string,
357 .probe = depca_eisa_probe,
358 .remove = __devexit_p (depca_device_remove)
359 }
360 };
361 #endif
362
363 #ifdef CONFIG_MCA
364 /*
365 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
366 */
367 #define DE210_ID 0x628d
368 #define DE212_ID 0x6def
369
370 static short depca_mca_adapter_ids[] = {
371 DE210_ID,
372 DE212_ID,
373 0x0000
374 };
375
376 static char *depca_mca_adapter_name[] = {
377 "DEC EtherWORKS MC Adapter (DE210)",
378 "DEC EtherWORKS MC Adapter (DE212)",
379 NULL
380 };
381
382 static enum depca_type depca_mca_adapter_type[] = {
383 de210,
384 de212,
385 0
386 };
387
388 static int depca_mca_probe (struct device *);
389
390 static struct mca_driver depca_mca_driver = {
391 .id_table = depca_mca_adapter_ids,
392 .driver = {
393 .name = depca_string,
394 .bus = &mca_bus_type,
395 .probe = depca_mca_probe,
396 .remove = __devexit_p(depca_device_remove),
397 },
398 };
399 #endif
400
401 static int depca_isa_probe (struct platform_device *);
402
403 static int __devexit depca_isa_remove(struct platform_device *pdev)
404 {
405 return depca_device_remove(&pdev->dev);
406 }
407
408 static struct platform_driver depca_isa_driver = {
409 .probe = depca_isa_probe,
410 .remove = __devexit_p(depca_isa_remove),
411 .driver = {
412 .name = depca_string,
413 },
414 };
415
416 /*
417 ** Miscellaneous info...
418 */
419 #define DEPCA_STRLEN 16
420
421 /*
422 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
423 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
424 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
425 ** and hence the RX descriptor ring's first entry.
426 */
427 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
428 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
429 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
430
431 /*
432 ** The DEPCA Rx and Tx ring descriptors.
433 */
434 struct depca_rx_desc {
435 volatile s32 base;
436 s16 buf_length; /* This length is negative 2's complement! */
437 s16 msg_length; /* This length is "normal". */
438 };
439
440 struct depca_tx_desc {
441 volatile s32 base;
442 s16 length; /* This length is negative 2's complement! */
443 s16 misc; /* Errors and TDR info */
444 };
445
446 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
447 to LANCE memory address space */
448
449 /*
450 ** The Lance initialization block, described in databook, in common memory.
451 */
452 struct depca_init {
453 u16 mode; /* Mode register */
454 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
455 u8 mcast_table[8]; /* Multicast Hash Table. */
456 u32 rx_ring; /* Rx ring base pointer & ring length */
457 u32 tx_ring; /* Tx ring base pointer & ring length */
458 };
459
460 #define DEPCA_PKT_STAT_SZ 16
461 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
462 increase DEPCA_PKT_STAT_SZ */
463 struct depca_private {
464 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
465 enum depca_type adapter; /* Adapter type */
466 enum {
467 DEPCA_BUS_MCA = 1,
468 DEPCA_BUS_ISA,
469 DEPCA_BUS_EISA,
470 } depca_bus; /* type of bus */
471 struct depca_init init_block; /* Shadow Initialization block */
472 /* CPU address space fields */
473 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
474 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
475 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
477 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
478 u_long mem_start; /* Bus address of device RAM (before remap) */
479 u_long mem_len; /* device memory size */
480 /* Device address space fields */
481 u_long device_ram_start; /* Start of RAM in device addr space */
482 /* Offsets used in both address spaces */
483 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
484 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
485 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
486 /* Kernel-only (not device) fields */
487 int rx_new, tx_new; /* The next free ring entry */
488 int rx_old, tx_old; /* The ring entries to be free()ed. */
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 netdev_tx_t depca_start_xmit(struct sk_buff *skb,
521 struct net_device *dev);
522 static irqreturn_t depca_interrupt(int irq, void *dev_id);
523 static int depca_close(struct net_device *dev);
524 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
525 static void depca_tx_timeout(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 const struct net_device_ops depca_netdev_ops = {
572 .ndo_open = depca_open,
573 .ndo_start_xmit = depca_start_xmit,
574 .ndo_stop = depca_close,
575 .ndo_set_rx_mode = set_multicast_list,
576 .ndo_do_ioctl = depca_ioctl,
577 .ndo_tx_timeout = depca_tx_timeout,
578 .ndo_change_mtu = eth_change_mtu,
579 .ndo_set_mac_address = eth_mac_addr,
580 .ndo_validate_addr = eth_validate_addr,
581 };
582
583 static int __init depca_hw_init (struct net_device *dev, struct device *device)
584 {
585 struct depca_private *lp;
586 int i, j, offset, netRAM, mem_len, status = 0;
587 s16 nicsr;
588 u_long ioaddr;
589 u_long mem_start;
590
591 /*
592 * We are now supposed to enter this function with the
593 * following fields filled with proper values :
594 *
595 * dev->base_addr
596 * lp->mem_start
597 * lp->depca_bus
598 * lp->adapter
599 *
600 * dev->irq can be set if known from device configuration (on
601 * MCA or EISA) or module option. Otherwise, it will be auto
602 * detected.
603 */
604
605 ioaddr = dev->base_addr;
606
607 STOP_DEPCA;
608
609 nicsr = inb(DEPCA_NICSR);
610 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
611 outb(nicsr, DEPCA_NICSR);
612
613 if (inw(DEPCA_DATA) != STOP) {
614 return -ENXIO;
615 }
616
617 lp = netdev_priv(dev);
618 mem_start = lp->mem_start;
619
620 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
621 return -ENXIO;
622
623 printk("%s: %s at 0x%04lx",
624 dev_name(device), depca_signature[lp->adapter], ioaddr);
625
626 switch (lp->depca_bus) {
627 #ifdef CONFIG_MCA
628 case DEPCA_BUS_MCA:
629 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
630 break;
631 #endif
632
633 #ifdef CONFIG_EISA
634 case DEPCA_BUS_EISA:
635 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
636 break;
637 #endif
638
639 case DEPCA_BUS_ISA:
640 break;
641
642 default:
643 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
644 return -ENXIO;
645 }
646
647 printk(", h/w address ");
648 status = get_hw_addr(dev);
649 printk("%pM", dev->dev_addr);
650 if (status != 0) {
651 printk(" which has an Ethernet PROM CRC error.\n");
652 return -ENXIO;
653 }
654
655 /* Set up the maximum amount of network RAM(kB) */
656 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
657 if ((nicsr & _128KB) && (lp->adapter == de422))
658 netRAM = 128;
659
660 /* Shared Memory Base Address */
661 if (nicsr & BUF) {
662 nicsr &= ~BS; /* DEPCA RAM in top 32k */
663 netRAM -= 32;
664
665 /* Only EISA/ISA needs start address to be re-computed */
666 if (lp->depca_bus != DEPCA_BUS_MCA)
667 mem_start += 0x8000;
668 }
669
670 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)))
671 > (netRAM << 10)) {
672 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
673 return -ENXIO;
674 }
675
676 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
677
678 /* Enable the shadow RAM. */
679 if (lp->adapter != DEPCA) {
680 nicsr |= SHE;
681 outb(nicsr, DEPCA_NICSR);
682 }
683
684 spin_lock_init(&lp->lock);
685 sprintf(lp->adapter_name, "%s (%s)",
686 depca_signature[lp->adapter], dev_name(device));
687 status = -EBUSY;
688
689 /* Initialisation Block */
690 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
691 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
692 goto out_priv;
693 }
694
695 status = -EIO;
696 lp->sh_mem = ioremap(mem_start, mem_len);
697 if (lp->sh_mem == NULL) {
698 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
699 goto out1;
700 }
701
702 lp->mem_start = mem_start;
703 lp->mem_len = mem_len;
704 lp->device_ram_start = mem_start & LA_MASK;
705
706 offset = 0;
707 offset += sizeof(struct depca_init);
708
709 /* Tx & Rx descriptors (aligned to a quadword boundary) */
710 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
711 lp->rx_ring = lp->sh_mem + offset;
712 lp->rx_ring_offset = offset;
713
714 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
715 lp->tx_ring = lp->sh_mem + offset;
716 lp->tx_ring_offset = offset;
717
718 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
719
720 lp->buffs_offset = offset;
721
722 /* Finish initialising the ring information. */
723 lp->rxRingMask = NUM_RX_DESC - 1;
724 lp->txRingMask = NUM_TX_DESC - 1;
725
726 /* Calculate Tx/Rx RLEN size for the descriptors. */
727 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
728 j >>= 1;
729 }
730 lp->rx_rlen = (s32) (i << 29);
731 for (i = 0, j = lp->txRingMask; j > 0; i++) {
732 j >>= 1;
733 }
734 lp->tx_rlen = (s32) (i << 29);
735
736 /* Load the initialisation block */
737 depca_init_ring(dev);
738
739 /* Initialise the control and status registers */
740 LoadCSRs(dev);
741
742 /* Enable DEPCA board interrupts for autoprobing */
743 nicsr = ((nicsr & ~IM) | IEN);
744 outb(nicsr, DEPCA_NICSR);
745
746 /* To auto-IRQ we enable the initialization-done and DMA err,
747 interrupts. For now we will always get a DMA error. */
748 if (dev->irq < 2) {
749 unsigned char irqnum;
750 unsigned long irq_mask, delay;
751
752 irq_mask = probe_irq_on();
753
754 /* Assign the correct irq list */
755 switch (lp->adapter) {
756 case DEPCA:
757 case de100:
758 case de101:
759 depca_irq = de1xx_irq;
760 break;
761 case de200:
762 case de201:
763 case de202:
764 case de210:
765 case de212:
766 depca_irq = de2xx_irq;
767 break;
768 case de422:
769 depca_irq = de422_irq;
770 break;
771
772 default:
773 break; /* Not reached */
774 }
775
776 /* Trigger an initialization just for the interrupt. */
777 outw(INEA | INIT, DEPCA_DATA);
778
779 delay = jiffies + HZ/50;
780 while (time_before(jiffies, delay))
781 yield();
782
783 irqnum = probe_irq_off(irq_mask);
784
785 status = -ENXIO;
786 if (!irqnum) {
787 printk(" and failed to detect IRQ line.\n");
788 goto out2;
789 } else {
790 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
791 if (irqnum == depca_irq[i]) {
792 dev->irq = irqnum;
793 printk(" and uses IRQ%d.\n", dev->irq);
794 }
795
796 if (!dev->irq) {
797 printk(" but incorrect IRQ line detected.\n");
798 goto out2;
799 }
800 }
801 } else {
802 printk(" and assigned IRQ%d.\n", dev->irq);
803 }
804
805 if (depca_debug > 1) {
806 printk(version);
807 }
808
809 /* The DEPCA-specific entries in the device structure. */
810 dev->netdev_ops = &depca_netdev_ops;
811 dev->watchdog_timeo = TX_TIMEOUT;
812
813 dev->mem_start = 0;
814
815 dev_set_drvdata(device, dev);
816 SET_NETDEV_DEV (dev, device);
817
818 status = register_netdev(dev);
819 if (status == 0)
820 return 0;
821 out2:
822 iounmap(lp->sh_mem);
823 out1:
824 release_mem_region (mem_start, mem_len);
825 out_priv:
826 return status;
827 }
828
829
830 static int depca_open(struct net_device *dev)
831 {
832 struct depca_private *lp = netdev_priv(dev);
833 u_long ioaddr = dev->base_addr;
834 s16 nicsr;
835 int status = 0;
836
837 STOP_DEPCA;
838 nicsr = inb(DEPCA_NICSR);
839
840 /* Make sure the shadow RAM is enabled */
841 if (lp->adapter != DEPCA) {
842 nicsr |= SHE;
843 outb(nicsr, DEPCA_NICSR);
844 }
845
846 /* Re-initialize the DEPCA... */
847 depca_init_ring(dev);
848 LoadCSRs(dev);
849
850 depca_dbg_open(dev);
851
852 if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
853 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
854 status = -EAGAIN;
855 } else {
856
857 /* Enable DEPCA board interrupts and turn off LED */
858 nicsr = ((nicsr & ~IM & ~LED) | IEN);
859 outb(nicsr, DEPCA_NICSR);
860 outw(CSR0, DEPCA_ADDR);
861
862 netif_start_queue(dev);
863
864 status = InitRestartDepca(dev);
865
866 if (depca_debug > 1) {
867 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
868 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
869 }
870 }
871 return status;
872 }
873
874 /* Initialize the lance Rx and Tx descriptor rings. */
875 static void depca_init_ring(struct net_device *dev)
876 {
877 struct depca_private *lp = netdev_priv(dev);
878 u_int i;
879 u_long offset;
880
881 /* Lock out other processes whilst setting up the hardware */
882 netif_stop_queue(dev);
883
884 lp->rx_new = lp->tx_new = 0;
885 lp->rx_old = lp->tx_old = 0;
886
887 /* Initialize the base address and length of each buffer in the ring */
888 for (i = 0; i <= lp->rxRingMask; i++) {
889 offset = lp->buffs_offset + i * RX_BUFF_SZ;
890 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
891 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
892 lp->rx_buff[i] = lp->sh_mem + offset;
893 }
894
895 for (i = 0; i <= lp->txRingMask; i++) {
896 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
897 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
898 lp->tx_buff[i] = lp->sh_mem + offset;
899 }
900
901 /* Set up the initialization block */
902 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
903 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
904
905 SetMulticastFilter(dev);
906
907 for (i = 0; i < ETH_ALEN; i++) {
908 lp->init_block.phys_addr[i] = dev->dev_addr[i];
909 }
910
911 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
912 }
913
914
915 static void depca_tx_timeout(struct net_device *dev)
916 {
917 u_long ioaddr = dev->base_addr;
918
919 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
920
921 STOP_DEPCA;
922 depca_init_ring(dev);
923 LoadCSRs(dev);
924 dev->trans_start = jiffies; /* prevent tx timeout */
925 netif_wake_queue(dev);
926 InitRestartDepca(dev);
927 }
928
929
930 /*
931 ** Writes a socket buffer to TX descriptor ring and starts transmission
932 */
933 static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
934 struct net_device *dev)
935 {
936 struct depca_private *lp = netdev_priv(dev);
937 u_long ioaddr = dev->base_addr;
938 int status = 0;
939
940 /* Transmitter timeout, serious problems. */
941 if (skb->len < 1)
942 goto out;
943
944 if (skb_padto(skb, ETH_ZLEN))
945 goto out;
946
947 netif_stop_queue(dev);
948
949 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950 status = load_packet(dev, skb);
951
952 if (!status) {
953 /* Trigger an immediate send demand. */
954 outw(CSR0, DEPCA_ADDR);
955 outw(INEA | TDMD, DEPCA_DATA);
956
957 dev_kfree_skb(skb);
958 }
959 if (TX_BUFFS_AVAIL)
960 netif_start_queue(dev);
961 } else
962 status = NETDEV_TX_LOCKED;
963
964 out:
965 return status;
966 }
967
968 /*
969 ** The DEPCA interrupt handler.
970 */
971 static irqreturn_t depca_interrupt(int irq, void *dev_id)
972 {
973 struct net_device *dev = dev_id;
974 struct depca_private *lp;
975 s16 csr0, nicsr;
976 u_long ioaddr;
977
978 if (dev == NULL) {
979 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
980 return IRQ_NONE;
981 }
982
983 lp = netdev_priv(dev);
984 ioaddr = dev->base_addr;
985
986 spin_lock(&lp->lock);
987
988 /* mask the DEPCA board interrupts and turn on the LED */
989 nicsr = inb(DEPCA_NICSR);
990 nicsr |= (IM | LED);
991 outb(nicsr, DEPCA_NICSR);
992
993 outw(CSR0, DEPCA_ADDR);
994 csr0 = inw(DEPCA_DATA);
995
996 /* Acknowledge all of the current interrupt sources ASAP. */
997 outw(csr0 & INTE, DEPCA_DATA);
998
999 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1000 depca_rx(dev);
1001
1002 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1003 depca_tx(dev);
1004
1005 /* Any resources available? */
1006 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1007 netif_wake_queue(dev);
1008 }
1009
1010 /* Unmask the DEPCA board interrupts and turn off the LED */
1011 nicsr = (nicsr & ~IM & ~LED);
1012 outb(nicsr, DEPCA_NICSR);
1013
1014 spin_unlock(&lp->lock);
1015 return IRQ_HANDLED;
1016 }
1017
1018 /* Called with lp->lock held */
1019 static int depca_rx(struct net_device *dev)
1020 {
1021 struct depca_private *lp = netdev_priv(dev);
1022 int i, entry;
1023 s32 status;
1024
1025 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1026 status = readl(&lp->rx_ring[entry].base) >> 16;
1027 if (status & R_STP) { /* Remember start of frame */
1028 lp->rx_old = entry;
1029 }
1030 if (status & R_ENP) { /* Valid frame status */
1031 if (status & R_ERR) { /* There was an error. */
1032 dev->stats.rx_errors++; /* Update the error stats. */
1033 if (status & R_FRAM)
1034 dev->stats.rx_frame_errors++;
1035 if (status & R_OFLO)
1036 dev->stats.rx_over_errors++;
1037 if (status & R_CRC)
1038 dev->stats.rx_crc_errors++;
1039 if (status & R_BUFF)
1040 dev->stats.rx_fifo_errors++;
1041 } else {
1042 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1043 struct sk_buff *skb;
1044
1045 skb = netdev_alloc_skb(dev, pkt_len + 2);
1046 if (skb != NULL) {
1047 unsigned char *buf;
1048 skb_reserve(skb, 2); /* 16 byte align the IP header */
1049 buf = skb_put(skb, pkt_len);
1050 if (entry < lp->rx_old) { /* Wrapped buffer */
1051 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1052 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1053 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1054 } else { /* Linear buffer */
1055 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1056 }
1057
1058 /*
1059 ** Notify the upper protocol layers that there is another
1060 ** packet to handle
1061 */
1062 skb->protocol = eth_type_trans(skb, dev);
1063 netif_rx(skb);
1064
1065 /*
1066 ** Update stats
1067 */
1068 dev->stats.rx_packets++;
1069 dev->stats.rx_bytes += pkt_len;
1070 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1071 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1072 lp->pktStats.bins[i]++;
1073 i = DEPCA_PKT_STAT_SZ;
1074 }
1075 }
1076 if (is_multicast_ether_addr(buf)) {
1077 if (is_broadcast_ether_addr(buf)) {
1078 lp->pktStats.broadcast++;
1079 } else {
1080 lp->pktStats.multicast++;
1081 }
1082 } else if (ether_addr_equal(buf,
1083 dev->dev_addr)) {
1084 lp->pktStats.unicast++;
1085 }
1086
1087 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1088 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1089 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1090 }
1091 } else {
1092 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1093 dev->stats.rx_dropped++; /* Really, deferred. */
1094 break;
1095 }
1096 }
1097 /* Change buffer ownership for this last frame, back to the adapter */
1098 for (; lp->rx_old != entry; lp->rx_old = (lp->rx_old + 1) & lp->rxRingMask) {
1099 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1100 }
1101 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1102 }
1103
1104 /*
1105 ** Update entry information
1106 */
1107 lp->rx_new = (lp->rx_new + 1) & lp->rxRingMask;
1108 }
1109
1110 return 0;
1111 }
1112
1113 /*
1114 ** Buffer sent - check for buffer errors.
1115 ** Called with lp->lock held
1116 */
1117 static int depca_tx(struct net_device *dev)
1118 {
1119 struct depca_private *lp = netdev_priv(dev);
1120 int entry;
1121 s32 status;
1122 u_long ioaddr = dev->base_addr;
1123
1124 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1125 status = readl(&lp->tx_ring[entry].base) >> 16;
1126
1127 if (status < 0) { /* Packet not yet sent! */
1128 break;
1129 } else if (status & T_ERR) { /* An error occurred. */
1130 status = readl(&lp->tx_ring[entry].misc);
1131 dev->stats.tx_errors++;
1132 if (status & TMD3_RTRY)
1133 dev->stats.tx_aborted_errors++;
1134 if (status & TMD3_LCAR)
1135 dev->stats.tx_carrier_errors++;
1136 if (status & TMD3_LCOL)
1137 dev->stats.tx_window_errors++;
1138 if (status & TMD3_UFLO)
1139 dev->stats.tx_fifo_errors++;
1140 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1141 /* Trigger an immediate send demand. */
1142 outw(CSR0, DEPCA_ADDR);
1143 outw(INEA | TDMD, DEPCA_DATA);
1144 }
1145 } else if (status & (T_MORE | T_ONE)) {
1146 dev->stats.collisions++;
1147 } else {
1148 dev->stats.tx_packets++;
1149 }
1150
1151 /* Update all the pointers */
1152 lp->tx_old = (lp->tx_old + 1) & lp->txRingMask;
1153 }
1154
1155 return 0;
1156 }
1157
1158 static int depca_close(struct net_device *dev)
1159 {
1160 struct depca_private *lp = netdev_priv(dev);
1161 s16 nicsr;
1162 u_long ioaddr = dev->base_addr;
1163
1164 netif_stop_queue(dev);
1165
1166 outw(CSR0, DEPCA_ADDR);
1167
1168 if (depca_debug > 1) {
1169 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1170 }
1171
1172 /*
1173 ** We stop the DEPCA here -- it occasionally polls
1174 ** memory if we don't.
1175 */
1176 outw(STOP, DEPCA_DATA);
1177
1178 /*
1179 ** Give back the ROM in case the user wants to go to DOS
1180 */
1181 if (lp->adapter != DEPCA) {
1182 nicsr = inb(DEPCA_NICSR);
1183 nicsr &= ~SHE;
1184 outb(nicsr, DEPCA_NICSR);
1185 }
1186
1187 /*
1188 ** Free the associated irq
1189 */
1190 free_irq(dev->irq, dev);
1191 return 0;
1192 }
1193
1194 static void LoadCSRs(struct net_device *dev)
1195 {
1196 struct depca_private *lp = netdev_priv(dev);
1197 u_long ioaddr = dev->base_addr;
1198
1199 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1200 outw((u16) lp->device_ram_start, DEPCA_DATA);
1201 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1202 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1203 outw(CSR3, DEPCA_ADDR); /* ALE control */
1204 outw(ACON, DEPCA_DATA);
1205
1206 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1207 }
1208
1209 static int InitRestartDepca(struct net_device *dev)
1210 {
1211 struct depca_private *lp = netdev_priv(dev);
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 /*
1239 ** Set or clear the multicast filter for this adaptor.
1240 */
1241 static void set_multicast_list(struct net_device *dev)
1242 {
1243 struct depca_private *lp = netdev_priv(dev);
1244 u_long ioaddr = dev->base_addr;
1245
1246 netif_stop_queue(dev);
1247 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1248
1249 STOP_DEPCA; /* Temporarily stop the depca. */
1250 depca_init_ring(dev); /* Initialize the descriptor rings */
1251
1252 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1253 lp->init_block.mode |= PROM;
1254 } else {
1255 SetMulticastFilter(dev);
1256 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1257 }
1258
1259 LoadCSRs(dev); /* Reload CSR3 */
1260 InitRestartDepca(dev); /* Resume normal operation. */
1261 netif_start_queue(dev); /* Unlock the TX ring */
1262 }
1263
1264 /*
1265 ** Calculate the hash code and update the logical address filter
1266 ** from a list of ethernet multicast addresses.
1267 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1268 ** LANCE calculates its hash codes big endian.
1269 */
1270 static void SetMulticastFilter(struct net_device *dev)
1271 {
1272 struct depca_private *lp = netdev_priv(dev);
1273 struct netdev_hw_addr *ha;
1274 int i, j, bit, byte;
1275 u16 hashcode;
1276 u32 crc;
1277
1278 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1279 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1280 lp->init_block.mcast_table[i] = (char) 0xff;
1281 }
1282 } else {
1283 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1284 lp->init_block.mcast_table[i] = 0;
1285 }
1286 /* Add multicast addresses */
1287 netdev_for_each_mc_addr(ha, dev) {
1288 crc = ether_crc(ETH_ALEN, ha->addr);
1289 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1290 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1291 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1292 }
1293
1294 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1295 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1296 lp->init_block.mcast_table[byte] |= bit;
1297 }
1298 }
1299 }
1300
1301 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1302 {
1303 int status = 0;
1304
1305 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1306 status = -EBUSY;
1307 goto out;
1308 }
1309
1310 if (DevicePresent(ioaddr)) {
1311 status = -ENODEV;
1312 goto out_release;
1313 }
1314
1315 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1316 status = -ENOMEM;
1317 goto out_release;
1318 }
1319
1320 return 0;
1321
1322 out_release:
1323 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1324 out:
1325 return status;
1326 }
1327
1328 #ifdef CONFIG_MCA
1329 /*
1330 ** Microchannel bus I/O device probe
1331 */
1332 static int __init depca_mca_probe(struct device *device)
1333 {
1334 unsigned char pos[2];
1335 unsigned char where;
1336 unsigned long iobase, mem_start;
1337 int irq, err;
1338 struct mca_device *mdev = to_mca_device (device);
1339 struct net_device *dev;
1340 struct depca_private *lp;
1341
1342 /*
1343 ** Search for the adapter. If an address has been given, search
1344 ** specifically for the card at that address. Otherwise find the
1345 ** first card in the system.
1346 */
1347
1348 pos[0] = mca_device_read_stored_pos(mdev, 2);
1349 pos[1] = mca_device_read_stored_pos(mdev, 3);
1350
1351 /*
1352 ** IO of card is handled by bits 1 and 2 of pos0.
1353 **
1354 ** bit2 bit1 IO
1355 ** 0 0 0x2c00
1356 ** 0 1 0x2c10
1357 ** 1 0 0x2c20
1358 ** 1 1 0x2c30
1359 */
1360 where = (pos[0] & 6) >> 1;
1361 iobase = 0x2c00 + (0x10 * where);
1362
1363 /*
1364 ** Found the adapter we were looking for. Now start setting it up.
1365 **
1366 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1367 ** of pos1. Bits are as follows (from the ADF file):
1368 **
1369 ** Bits
1370 ** 3 2 1 0 IRQ
1371 ** --------------------
1372 ** 0 0 1 0 5
1373 ** 0 0 0 1 9
1374 ** 0 1 0 0 10
1375 ** 1 0 0 0 11
1376 */
1377 where = pos[1] & 0x0f;
1378 switch (where) {
1379 case 1:
1380 irq = 9;
1381 break;
1382 case 2:
1383 irq = 5;
1384 break;
1385 case 4:
1386 irq = 10;
1387 break;
1388 case 8:
1389 irq = 11;
1390 break;
1391 default:
1392 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1393 return -EINVAL;
1394 }
1395
1396 /*
1397 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1398 ** They are mapped as follows:
1399 **
1400 ** Bit
1401 ** 5 4 3 Memory Addresses
1402 ** 0 0 0 C0000-CFFFF (64K)
1403 ** 1 0 0 C8000-CFFFF (32K)
1404 ** 0 0 1 D0000-DFFFF (64K)
1405 ** 1 0 1 D8000-DFFFF (32K)
1406 ** 0 1 0 E0000-EFFFF (64K)
1407 ** 1 1 0 E8000-EFFFF (32K)
1408 */
1409 where = (pos[0] & 0x18) >> 3;
1410 mem_start = 0xc0000 + (where * 0x10000);
1411 if (pos[0] & 0x20) {
1412 mem_start += 0x8000;
1413 }
1414
1415 /* claim the slot */
1416 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1417 sizeof(mdev->name));
1418 mca_device_set_claim(mdev, 1);
1419
1420 /*
1421 ** Get everything allocated and initialized... (almost just
1422 ** like the ISA and EISA probes)
1423 */
1424 irq = mca_device_transform_irq(mdev, irq);
1425 iobase = mca_device_transform_ioport(mdev, iobase);
1426
1427 if ((err = depca_common_init (iobase, &dev)))
1428 goto out_unclaim;
1429
1430 dev->irq = irq;
1431 dev->base_addr = iobase;
1432 lp = netdev_priv(dev);
1433 lp->depca_bus = DEPCA_BUS_MCA;
1434 lp->adapter = depca_mca_adapter_type[mdev->index];
1435 lp->mem_start = mem_start;
1436
1437 if ((err = depca_hw_init(dev, device)))
1438 goto out_free;
1439
1440 return 0;
1441
1442 out_free:
1443 free_netdev (dev);
1444 release_region (iobase, DEPCA_TOTAL_SIZE);
1445 out_unclaim:
1446 mca_device_set_claim(mdev, 0);
1447
1448 return err;
1449 }
1450 #endif
1451
1452 /*
1453 ** ISA bus I/O device probe
1454 */
1455
1456 static void __init depca_platform_probe (void)
1457 {
1458 int i;
1459 struct platform_device *pldev;
1460
1461 for (i = 0; depca_io_ports[i].iobase; i++) {
1462 depca_io_ports[i].device = NULL;
1463
1464 /* if an address has been specified on the command
1465 * line, use it (if valid) */
1466 if (io && io != depca_io_ports[i].iobase)
1467 continue;
1468
1469 pldev = platform_device_alloc(depca_string, i);
1470 if (!pldev)
1471 continue;
1472
1473 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1474 depca_io_ports[i].device = pldev;
1475
1476 if (platform_device_add(pldev)) {
1477 depca_io_ports[i].device = NULL;
1478 pldev->dev.platform_data = NULL;
1479 platform_device_put(pldev);
1480 continue;
1481 }
1482
1483 if (!pldev->dev.driver) {
1484 /* The driver was not bound to this device, there was
1485 * no hardware at this address. Unregister it, as the
1486 * release function will take care of freeing the
1487 * allocated structure */
1488
1489 depca_io_ports[i].device = NULL;
1490 pldev->dev.platform_data = NULL;
1491 platform_device_unregister (pldev);
1492 }
1493 }
1494 }
1495
1496 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1497 {
1498 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1499 enum depca_type adapter = unknown;
1500 int i;
1501
1502 for (i = 0; mem_base[i]; i++) {
1503 *mem_start = mem ? mem : mem_base[i];
1504 adapter = DepcaSignature (adapter_name, *mem_start);
1505 if (adapter != unknown)
1506 break;
1507 }
1508
1509 return adapter;
1510 }
1511
1512 static int __devinit depca_isa_probe (struct platform_device *device)
1513 {
1514 struct net_device *dev;
1515 struct depca_private *lp;
1516 u_long ioaddr, mem_start = 0;
1517 enum depca_type adapter = unknown;
1518 int status = 0;
1519
1520 ioaddr = (u_long) device->dev.platform_data;
1521
1522 if ((status = depca_common_init (ioaddr, &dev)))
1523 goto out;
1524
1525 adapter = depca_shmem_probe (&mem_start);
1526
1527 if (adapter == unknown) {
1528 status = -ENODEV;
1529 goto out_free;
1530 }
1531
1532 dev->base_addr = ioaddr;
1533 dev->irq = irq; /* Use whatever value the user gave
1534 * us, and 0 if he didn't. */
1535 lp = netdev_priv(dev);
1536 lp->depca_bus = DEPCA_BUS_ISA;
1537 lp->adapter = adapter;
1538 lp->mem_start = mem_start;
1539
1540 if ((status = depca_hw_init(dev, &device->dev)))
1541 goto out_free;
1542
1543 return 0;
1544
1545 out_free:
1546 free_netdev (dev);
1547 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1548 out:
1549 return status;
1550 }
1551
1552 /*
1553 ** EISA callbacks from sysfs.
1554 */
1555
1556 #ifdef CONFIG_EISA
1557 static int __init depca_eisa_probe (struct device *device)
1558 {
1559 enum depca_type adapter = unknown;
1560 struct eisa_device *edev;
1561 struct net_device *dev;
1562 struct depca_private *lp;
1563 u_long ioaddr, mem_start;
1564 int status = 0;
1565
1566 edev = to_eisa_device (device);
1567 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1568
1569 if ((status = depca_common_init (ioaddr, &dev)))
1570 goto out;
1571
1572 /* It would have been nice to get card configuration from the
1573 * card. Unfortunately, this register is write-only (shares
1574 * it's address with the ethernet prom)... As we don't parse
1575 * the EISA configuration structures (yet... :-), just rely on
1576 * the ISA probing to sort it out... */
1577
1578 adapter = depca_shmem_probe (&mem_start);
1579 if (adapter == unknown) {
1580 status = -ENODEV;
1581 goto out_free;
1582 }
1583
1584 dev->base_addr = ioaddr;
1585 dev->irq = irq;
1586 lp = netdev_priv(dev);
1587 lp->depca_bus = DEPCA_BUS_EISA;
1588 lp->adapter = edev->id.driver_data;
1589 lp->mem_start = mem_start;
1590
1591 if ((status = depca_hw_init(dev, device)))
1592 goto out_free;
1593
1594 return 0;
1595
1596 out_free:
1597 free_netdev (dev);
1598 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1599 out:
1600 return status;
1601 }
1602 #endif
1603
1604 static int __devexit depca_device_remove (struct device *device)
1605 {
1606 struct net_device *dev;
1607 struct depca_private *lp;
1608 int bus;
1609
1610 dev = dev_get_drvdata(device);
1611 lp = netdev_priv(dev);
1612
1613 unregister_netdev (dev);
1614 iounmap (lp->sh_mem);
1615 release_mem_region (lp->mem_start, lp->mem_len);
1616 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1617 bus = lp->depca_bus;
1618 free_netdev (dev);
1619
1620 return 0;
1621 }
1622
1623 /*
1624 ** Look for a particular board name in the on-board Remote Diagnostics
1625 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1626 ** base address.
1627 */
1628 static int __init DepcaSignature(char *name, u_long base_addr)
1629 {
1630 u_int i, j, k;
1631 void __iomem *ptr;
1632 char tmpstr[16];
1633 u_long prom_addr = base_addr + 0xc000;
1634 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1635
1636 /* Can't reserve the prom region, it is already marked as
1637 * used, at least on x86. Instead, reserve a memory region a
1638 * board would certainly use. If it works, go ahead. If not,
1639 * run like hell... */
1640
1641 if (!request_mem_region (mem_addr, 16, depca_string))
1642 return unknown;
1643
1644 /* Copy the first 16 bytes of ROM */
1645
1646 ptr = ioremap(prom_addr, 16);
1647 if (ptr == NULL) {
1648 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1649 return unknown;
1650 }
1651 for (i = 0; i < 16; i++) {
1652 tmpstr[i] = readb(ptr + i);
1653 }
1654 iounmap(ptr);
1655
1656 release_mem_region (mem_addr, 16);
1657
1658 /* Check if PROM contains a valid string */
1659 for (i = 0; *depca_signature[i] != '\0'; i++) {
1660 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1661 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1662 k++;
1663 } else { /* lost signature; begin search again */
1664 k = 0;
1665 }
1666 }
1667 if (k == strlen(depca_signature[i]))
1668 break;
1669 }
1670
1671 /* Check if name string is valid, provided there's no PROM */
1672 if (name && *name && (i == unknown)) {
1673 for (i = 0; *depca_signature[i] != '\0'; i++) {
1674 if (strcmp(name, depca_signature[i]) == 0)
1675 break;
1676 }
1677 }
1678
1679 return i;
1680 }
1681
1682 /*
1683 ** Look for a special sequence in the Ethernet station address PROM that
1684 ** is common across all DEPCA products. Note that the original DEPCA needs
1685 ** its ROM address counter to be initialized and enabled. Only enable
1686 ** if the first address octet is a 0x08 - this minimises the chances of
1687 ** messing around with some other hardware, but it assumes that this DEPCA
1688 ** card initialized itself correctly.
1689 **
1690 ** Search the Ethernet address ROM for the signature. Since the ROM address
1691 ** counter can start at an arbitrary point, the search must include the entire
1692 ** probe sequence length plus the (length_of_the_signature - 1).
1693 ** Stop the search IMMEDIATELY after the signature is found so that the
1694 ** PROM address counter is correctly positioned at the start of the
1695 ** ethernet address for later read out.
1696 */
1697 static int __init DevicePresent(u_long ioaddr)
1698 {
1699 union {
1700 struct {
1701 u32 a;
1702 u32 b;
1703 } llsig;
1704 char Sig[sizeof(u32) << 1];
1705 }
1706 dev;
1707 short sigLength = 0;
1708 s8 data;
1709 s16 nicsr;
1710 int i, j, status = 0;
1711
1712 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1713 data = inb(DEPCA_PROM); /* read data */
1714
1715 if (data == 0x08) { /* Enable counter on DEPCA */
1716 nicsr = inb(DEPCA_NICSR);
1717 nicsr |= AAC;
1718 outb(nicsr, DEPCA_NICSR);
1719 }
1720
1721 dev.llsig.a = ETH_PROM_SIG;
1722 dev.llsig.b = ETH_PROM_SIG;
1723 sigLength = sizeof(u32) << 1;
1724
1725 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1726 data = inb(DEPCA_PROM);
1727 if (dev.Sig[j] == data) { /* track signature */
1728 j++;
1729 } else { /* lost signature; begin search again */
1730 if (data == dev.Sig[0]) { /* rare case.... */
1731 j = 1;
1732 } else {
1733 j = 0;
1734 }
1735 }
1736 }
1737
1738 if (j != sigLength) {
1739 status = -ENODEV; /* search failed */
1740 }
1741
1742 return status;
1743 }
1744
1745 /*
1746 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1747 ** reason: access the upper half of the PROM with x=0; access the lower half
1748 ** with x=1.
1749 */
1750 static int __init get_hw_addr(struct net_device *dev)
1751 {
1752 u_long ioaddr = dev->base_addr;
1753 struct depca_private *lp = netdev_priv(dev);
1754 int i, k, tmp, status = 0;
1755 u_short j, x, chksum;
1756
1757 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1758
1759 for (i = 0, k = 0, j = 0; j < 3; j++) {
1760 k <<= 1;
1761 if (k > 0xffff)
1762 k -= 0xffff;
1763
1764 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1765 dev->dev_addr[i++] = (u_char) tmp;
1766 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1767 dev->dev_addr[i++] = (u_char) tmp;
1768
1769 if (k > 0xffff)
1770 k -= 0xffff;
1771 }
1772 if (k == 0xffff)
1773 k = 0;
1774
1775 chksum = (u_char) inb(DEPCA_PROM + x);
1776 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1777 if (k != chksum)
1778 status = -1;
1779
1780 return status;
1781 }
1782
1783 /*
1784 ** Load a packet into the shared memory
1785 */
1786 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1787 {
1788 struct depca_private *lp = netdev_priv(dev);
1789 int i, entry, end, len, status = NETDEV_TX_OK;
1790
1791 entry = lp->tx_new; /* Ring around buffer number. */
1792 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1793 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1794 /*
1795 ** Caution: the write order is important here... don't set up the
1796 ** ownership rights until all the other information is in place.
1797 */
1798 if (end < entry) { /* wrapped buffer */
1799 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1800 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1801 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1802 } else { /* linear buffer */
1803 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1804 }
1805
1806 /* set up the buffer descriptors */
1807 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1808 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1809 /* clean out flags */
1810 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1811 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1812 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1813 len -= TX_BUFF_SZ;
1814 }
1815 /* clean out flags */
1816 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1817 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1818 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1819
1820 /* start of packet */
1821 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1822 /* end of packet */
1823 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1824
1825 for (i = end; i != entry; --i) {
1826 /* ownership of packet */
1827 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1828 if (i == 0)
1829 i = lp->txRingMask + 1;
1830 }
1831 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1832
1833 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1834 } else {
1835 status = NETDEV_TX_LOCKED;
1836 }
1837
1838 return status;
1839 }
1840
1841 static void depca_dbg_open(struct net_device *dev)
1842 {
1843 struct depca_private *lp = netdev_priv(dev);
1844 u_long ioaddr = dev->base_addr;
1845 struct depca_init *p = &lp->init_block;
1846 int i;
1847
1848 if (depca_debug > 1) {
1849 /* Do not copy the shadow init block into shared memory */
1850 /* Debugging should not affect normal operation! */
1851 /* The shadow init block will get copied across during InitRestartDepca */
1852 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1853 printk("Descriptor head addresses (CPU):\n");
1854 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1855 printk("Descriptor addresses (CPU):\nRX: ");
1856 for (i = 0; i < lp->rxRingMask; i++) {
1857 if (i < 3) {
1858 printk("%p ", &lp->rx_ring[i].base);
1859 }
1860 }
1861 printk("...%p\n", &lp->rx_ring[i].base);
1862 printk("TX: ");
1863 for (i = 0; i < lp->txRingMask; i++) {
1864 if (i < 3) {
1865 printk("%p ", &lp->tx_ring[i].base);
1866 }
1867 }
1868 printk("...%p\n", &lp->tx_ring[i].base);
1869 printk("\nDescriptor buffers (Device):\nRX: ");
1870 for (i = 0; i < lp->rxRingMask; i++) {
1871 if (i < 3) {
1872 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1873 }
1874 }
1875 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1876 printk("TX: ");
1877 for (i = 0; i < lp->txRingMask; i++) {
1878 if (i < 3) {
1879 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1880 }
1881 }
1882 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1883 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1884 printk(" mode: 0x%4.4x\n", p->mode);
1885 printk(" physical address: %pM\n", p->phys_addr);
1886 printk(" multicast hash table: ");
1887 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1888 printk("%2.2x:", p->mcast_table[i]);
1889 }
1890 printk("%2.2x\n", p->mcast_table[i]);
1891 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1892 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1893 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1894 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1895 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1896 outw(CSR2, DEPCA_ADDR);
1897 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1898 outw(CSR1, DEPCA_ADDR);
1899 printk("%4.4x\n", inw(DEPCA_DATA));
1900 outw(CSR3, DEPCA_ADDR);
1901 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1902 }
1903 }
1904
1905 /*
1906 ** Perform IOCTL call functions here. Some are privileged operations and the
1907 ** effective uid is checked in those cases.
1908 ** All multicast IOCTLs will not work here and are for testing purposes only.
1909 */
1910 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1911 {
1912 struct depca_private *lp = netdev_priv(dev);
1913 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1914 int i, status = 0;
1915 u_long ioaddr = dev->base_addr;
1916 union {
1917 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1918 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1919 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1920 } tmp;
1921 unsigned long flags;
1922 void *buf;
1923
1924 switch (ioc->cmd) {
1925 case DEPCA_GET_HWADDR: /* Get the hardware address */
1926 for (i = 0; i < ETH_ALEN; i++) {
1927 tmp.addr[i] = dev->dev_addr[i];
1928 }
1929 ioc->len = ETH_ALEN;
1930 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1931 return -EFAULT;
1932 break;
1933
1934 case DEPCA_SET_HWADDR: /* Set the hardware address */
1935 if (!capable(CAP_NET_ADMIN))
1936 return -EPERM;
1937 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1938 return -EFAULT;
1939 for (i = 0; i < ETH_ALEN; i++) {
1940 dev->dev_addr[i] = tmp.addr[i];
1941 }
1942 netif_stop_queue(dev);
1943 while (lp->tx_old != lp->tx_new)
1944 cpu_relax(); /* Wait for the ring to empty */
1945
1946 STOP_DEPCA; /* Temporarily stop the depca. */
1947 depca_init_ring(dev); /* Initialize the descriptor rings */
1948 LoadCSRs(dev); /* Reload CSR3 */
1949 InitRestartDepca(dev); /* Resume normal operation. */
1950 netif_start_queue(dev); /* Unlock the TX ring */
1951 break;
1952
1953 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1954 if (!capable(CAP_NET_ADMIN))
1955 return -EPERM;
1956 netif_stop_queue(dev);
1957 while (lp->tx_old != lp->tx_new)
1958 cpu_relax(); /* Wait for the ring to empty */
1959
1960 STOP_DEPCA; /* Temporarily stop the depca. */
1961 depca_init_ring(dev); /* Initialize the descriptor rings */
1962 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1963
1964 LoadCSRs(dev); /* Reload CSR3 */
1965 InitRestartDepca(dev); /* Resume normal operation. */
1966 netif_start_queue(dev); /* Unlock the TX ring */
1967 break;
1968
1969 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1970 if (!capable(CAP_NET_ADMIN))
1971 return -EPERM;
1972 netif_stop_queue(dev);
1973 while (lp->tx_old != lp->tx_new)
1974 cpu_relax(); /* Wait for the ring to empty */
1975
1976 STOP_DEPCA; /* Temporarily stop the depca. */
1977 depca_init_ring(dev); /* Initialize the descriptor rings */
1978 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1979
1980 LoadCSRs(dev); /* Reload CSR3 */
1981 InitRestartDepca(dev); /* Resume normal operation. */
1982 netif_start_queue(dev); /* Unlock the TX ring */
1983 break;
1984
1985 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1986 if(!capable(CAP_NET_ADMIN))
1987 return -EPERM;
1988 printk("%s: Boo!\n", dev->name);
1989 break;
1990
1991 case DEPCA_GET_MCA: /* Get the multicast address table */
1992 ioc->len = (HASH_TABLE_LEN >> 3);
1993 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
1994 return -EFAULT;
1995 break;
1996
1997 case DEPCA_SET_MCA: /* Set a multicast address */
1998 if (!capable(CAP_NET_ADMIN))
1999 return -EPERM;
2000 if (ioc->len >= HASH_TABLE_LEN)
2001 return -EINVAL;
2002 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2003 return -EFAULT;
2004 set_multicast_list(dev);
2005 break;
2006
2007 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2008 if (!capable(CAP_NET_ADMIN))
2009 return -EPERM;
2010 set_multicast_list(dev);
2011 break;
2012
2013 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2014 if (!capable(CAP_NET_ADMIN))
2015 return -EPERM;
2016 set_multicast_list(dev);
2017 break;
2018
2019 case DEPCA_GET_STATS: /* Get the driver statistics */
2020 ioc->len = sizeof(lp->pktStats);
2021 buf = kmalloc(ioc->len, GFP_KERNEL);
2022 if(!buf)
2023 return -ENOMEM;
2024 spin_lock_irqsave(&lp->lock, flags);
2025 memcpy(buf, &lp->pktStats, ioc->len);
2026 spin_unlock_irqrestore(&lp->lock, flags);
2027 if (copy_to_user(ioc->data, buf, ioc->len))
2028 status = -EFAULT;
2029 kfree(buf);
2030 break;
2031
2032 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2033 if (!capable(CAP_NET_ADMIN))
2034 return -EPERM;
2035 spin_lock_irqsave(&lp->lock, flags);
2036 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2037 spin_unlock_irqrestore(&lp->lock, flags);
2038 break;
2039
2040 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2041 i = 0;
2042 tmp.sval[i++] = inw(DEPCA_NICSR);
2043 outw(CSR0, DEPCA_ADDR); /* status register */
2044 tmp.sval[i++] = inw(DEPCA_DATA);
2045 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2046 ioc->len = i + sizeof(struct depca_init);
2047 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2048 return -EFAULT;
2049 break;
2050
2051 default:
2052 return -EOPNOTSUPP;
2053 }
2054
2055 return status;
2056 }
2057
2058 static int __init depca_module_init (void)
2059 {
2060 int err = 0;
2061
2062 #ifdef CONFIG_MCA
2063 err = mca_register_driver(&depca_mca_driver);
2064 if (err)
2065 goto err;
2066 #endif
2067 #ifdef CONFIG_EISA
2068 err = eisa_driver_register(&depca_eisa_driver);
2069 if (err)
2070 goto err_mca;
2071 #endif
2072 err = platform_driver_register(&depca_isa_driver);
2073 if (err)
2074 goto err_eisa;
2075
2076 depca_platform_probe();
2077 return 0;
2078
2079 err_eisa:
2080 #ifdef CONFIG_EISA
2081 eisa_driver_unregister(&depca_eisa_driver);
2082 err_mca:
2083 #endif
2084 #ifdef CONFIG_MCA
2085 mca_unregister_driver(&depca_mca_driver);
2086 err:
2087 #endif
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);
Linux kernel - Deliverables
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