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Linux 2.6.33-rc8
[linux-2.6/lguest.git] / drivers / net / depca.c
blob0c1f491d20bfecf6605cec2843e79feba2ba40fc
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_multicast_list = 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 = (struct depca_rx_desc __iomem *) (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 = (struct depca_tx_desc __iomem *) (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;
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->trans_start = jiffies;
958 dev_kfree_skb(skb);
959 }
960 if (TX_BUFFS_AVAIL)
961 netif_start_queue(dev);
962 } else
963 status = NETDEV_TX_LOCKED;
964
965 out:
966 return status;
967 }
968
969 /*
970 ** The DEPCA interrupt handler.
971 */
972 static irqreturn_t depca_interrupt(int irq, void *dev_id)
973 {
974 struct net_device *dev = dev_id;
975 struct depca_private *lp;
976 s16 csr0, nicsr;
977 u_long ioaddr;
978
979 if (dev == NULL) {
980 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
981 return IRQ_NONE;
982 }
983
984 lp = netdev_priv(dev);
985 ioaddr = dev->base_addr;
986
987 spin_lock(&lp->lock);
988
989 /* mask the DEPCA board interrupts and turn on the LED */
990 nicsr = inb(DEPCA_NICSR);
991 nicsr |= (IM | LED);
992 outb(nicsr, DEPCA_NICSR);
993
994 outw(CSR0, DEPCA_ADDR);
995 csr0 = inw(DEPCA_DATA);
996
997 /* Acknowledge all of the current interrupt sources ASAP. */
998 outw(csr0 & INTE, DEPCA_DATA);
999
1000 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1001 depca_rx(dev);
1002
1003 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1004 depca_tx(dev);
1005
1006 /* Any resources available? */
1007 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1008 netif_wake_queue(dev);
1009 }
1010
1011 /* Unmask the DEPCA board interrupts and turn off the LED */
1012 nicsr = (nicsr & ~IM & ~LED);
1013 outb(nicsr, DEPCA_NICSR);
1014
1015 spin_unlock(&lp->lock);
1016 return IRQ_HANDLED;
1017 }
1018
1019 /* Called with lp->lock held */
1020 static int depca_rx(struct net_device *dev)
1021 {
1022 struct depca_private *lp = netdev_priv(dev);
1023 int i, entry;
1024 s32 status;
1025
1026 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1027 status = readl(&lp->rx_ring[entry].base) >> 16;
1028 if (status & R_STP) { /* Remember start of frame */
1029 lp->rx_old = entry;
1030 }
1031 if (status & R_ENP) { /* Valid frame status */
1032 if (status & R_ERR) { /* There was an error. */
1033 dev->stats.rx_errors++; /* Update the error stats. */
1034 if (status & R_FRAM)
1035 dev->stats.rx_frame_errors++;
1036 if (status & R_OFLO)
1037 dev->stats.rx_over_errors++;
1038 if (status & R_CRC)
1039 dev->stats.rx_crc_errors++;
1040 if (status & R_BUFF)
1041 dev->stats.rx_fifo_errors++;
1042 } else {
1043 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1044 struct sk_buff *skb;
1045
1046 skb = dev_alloc_skb(pkt_len + 2);
1047 if (skb != NULL) {
1048 unsigned char *buf;
1049 skb_reserve(skb, 2); /* 16 byte align the IP header */
1050 buf = skb_put(skb, pkt_len);
1051 if (entry < lp->rx_old) { /* Wrapped buffer */
1052 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1053 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1054 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1055 } else { /* Linear buffer */
1056 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1057 }
1058
1059 /*
1060 ** Notify the upper protocol layers that there is another
1061 ** packet to handle
1062 */
1063 skb->protocol = eth_type_trans(skb, dev);
1064 netif_rx(skb);
1065
1066 /*
1067 ** Update stats
1068 */
1069 dev->stats.rx_packets++;
1070 dev->stats.rx_bytes += pkt_len;
1071 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1072 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1073 lp->pktStats.bins[i]++;
1074 i = DEPCA_PKT_STAT_SZ;
1075 }
1076 }
1077 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1078 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1079 lp->pktStats.broadcast++;
1080 } else {
1081 lp->pktStats.multicast++;
1082 }
1083 } 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])) {
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) & 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) & 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) & 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 return;
1209 }
1210
1211 static int InitRestartDepca(struct net_device *dev)
1212 {
1213 struct depca_private *lp = netdev_priv(dev);
1214 u_long ioaddr = dev->base_addr;
1215 int i, status = 0;
1216
1217 /* Copy the shadow init_block to shared memory */
1218 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1219
1220 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1221 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1222
1223 /* wait for lance to complete initialisation */
1224 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1225
1226 if (i != 100) {
1227 /* clear IDON by writing a "1", enable interrupts and start lance */
1228 outw(IDON | INEA | STRT, DEPCA_DATA);
1229 if (depca_debug > 2) {
1230 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1231 }
1232 } else {
1233 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1234 status = -1;
1235 }
1236
1237 return status;
1238 }
1239
1240 /*
1241 ** Set or clear the multicast filter for this adaptor.
1242 */
1243 static void set_multicast_list(struct net_device *dev)
1244 {
1245 struct depca_private *lp = netdev_priv(dev);
1246 u_long ioaddr = dev->base_addr;
1247
1248 netif_stop_queue(dev);
1249 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1250
1251 STOP_DEPCA; /* Temporarily stop the depca. */
1252 depca_init_ring(dev); /* Initialize the descriptor rings */
1253
1254 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1255 lp->init_block.mode |= PROM;
1256 } else {
1257 SetMulticastFilter(dev);
1258 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1259 }
1260
1261 LoadCSRs(dev); /* Reload CSR3 */
1262 InitRestartDepca(dev); /* Resume normal operation. */
1263 netif_start_queue(dev); /* Unlock the TX ring */
1264 }
1265
1266 /*
1267 ** Calculate the hash code and update the logical address filter
1268 ** from a list of ethernet multicast addresses.
1269 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1270 ** LANCE calculates its hash codes big endian.
1271 */
1272 static void SetMulticastFilter(struct net_device *dev)
1273 {
1274 struct depca_private *lp = netdev_priv(dev);
1275 struct dev_mc_list *dmi = dev->mc_list;
1276 char *addrs;
1277 int i, j, bit, byte;
1278 u16 hashcode;
1279 u32 crc;
1280
1281 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1282 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1283 lp->init_block.mcast_table[i] = (char) 0xff;
1284 }
1285 } else {
1286 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1287 lp->init_block.mcast_table[i] = 0;
1288 }
1289 /* Add multicast addresses */
1290 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1291 addrs = dmi->dmi_addr;
1292 dmi = dmi->next;
1293 if ((*addrs & 0x01) == 1) { /* multicast address? */
1294 crc = ether_crc(ETH_ALEN, addrs);
1295 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1296 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1297 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1298 }
1299
1300
1301 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1302 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1303 lp->init_block.mcast_table[byte] |= bit;
1304 }
1305 }
1306 }
1307
1308 return;
1309 }
1310
1311 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1312 {
1313 int status = 0;
1314
1315 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1316 status = -EBUSY;
1317 goto out;
1318 }
1319
1320 if (DevicePresent(ioaddr)) {
1321 status = -ENODEV;
1322 goto out_release;
1323 }
1324
1325 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1326 status = -ENOMEM;
1327 goto out_release;
1328 }
1329
1330 return 0;
1331
1332 out_release:
1333 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1334 out:
1335 return status;
1336 }
1337
1338 #ifdef CONFIG_MCA
1339 /*
1340 ** Microchannel bus I/O device probe
1341 */
1342 static int __init depca_mca_probe(struct device *device)
1343 {
1344 unsigned char pos[2];
1345 unsigned char where;
1346 unsigned long iobase, mem_start;
1347 int irq, err;
1348 struct mca_device *mdev = to_mca_device (device);
1349 struct net_device *dev;
1350 struct depca_private *lp;
1351
1352 /*
1353 ** Search for the adapter. If an address has been given, search
1354 ** specifically for the card at that address. Otherwise find the
1355 ** first card in the system.
1356 */
1357
1358 pos[0] = mca_device_read_stored_pos(mdev, 2);
1359 pos[1] = mca_device_read_stored_pos(mdev, 3);
1360
1361 /*
1362 ** IO of card is handled by bits 1 and 2 of pos0.
1363 **
1364 ** bit2 bit1 IO
1365 ** 0 0 0x2c00
1366 ** 0 1 0x2c10
1367 ** 1 0 0x2c20
1368 ** 1 1 0x2c30
1369 */
1370 where = (pos[0] & 6) >> 1;
1371 iobase = 0x2c00 + (0x10 * where);
1372
1373 /*
1374 ** Found the adapter we were looking for. Now start setting it up.
1375 **
1376 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1377 ** of pos1. Bits are as follows (from the ADF file):
1378 **
1379 ** Bits
1380 ** 3 2 1 0 IRQ
1381 ** --------------------
1382 ** 0 0 1 0 5
1383 ** 0 0 0 1 9
1384 ** 0 1 0 0 10
1385 ** 1 0 0 0 11
1386 */
1387 where = pos[1] & 0x0f;
1388 switch (where) {
1389 case 1:
1390 irq = 9;
1391 break;
1392 case 2:
1393 irq = 5;
1394 break;
1395 case 4:
1396 irq = 10;
1397 break;
1398 case 8:
1399 irq = 11;
1400 break;
1401 default:
1402 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1403 return -EINVAL;
1404 }
1405
1406 /*
1407 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1408 ** They are mapped as follows:
1409 **
1410 ** Bit
1411 ** 5 4 3 Memory Addresses
1412 ** 0 0 0 C0000-CFFFF (64K)
1413 ** 1 0 0 C8000-CFFFF (32K)
1414 ** 0 0 1 D0000-DFFFF (64K)
1415 ** 1 0 1 D8000-DFFFF (32K)
1416 ** 0 1 0 E0000-EFFFF (64K)
1417 ** 1 1 0 E8000-EFFFF (32K)
1418 */
1419 where = (pos[0] & 0x18) >> 3;
1420 mem_start = 0xc0000 + (where * 0x10000);
1421 if (pos[0] & 0x20) {
1422 mem_start += 0x8000;
1423 }
1424
1425 /* claim the slot */
1426 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1427 sizeof(mdev->name));
1428 mca_device_set_claim(mdev, 1);
1429
1430 /*
1431 ** Get everything allocated and initialized... (almost just
1432 ** like the ISA and EISA probes)
1433 */
1434 irq = mca_device_transform_irq(mdev, irq);
1435 iobase = mca_device_transform_ioport(mdev, iobase);
1436
1437 if ((err = depca_common_init (iobase, &dev)))
1438 goto out_unclaim;
1439
1440 dev->irq = irq;
1441 dev->base_addr = iobase;
1442 lp = netdev_priv(dev);
1443 lp->depca_bus = DEPCA_BUS_MCA;
1444 lp->adapter = depca_mca_adapter_type[mdev->index];
1445 lp->mem_start = mem_start;
1446
1447 if ((err = depca_hw_init(dev, device)))
1448 goto out_free;
1449
1450 return 0;
1451
1452 out_free:
1453 free_netdev (dev);
1454 release_region (iobase, DEPCA_TOTAL_SIZE);
1455 out_unclaim:
1456 mca_device_set_claim(mdev, 0);
1457
1458 return err;
1459 }
1460 #endif
1461
1462 /*
1463 ** ISA bus I/O device probe
1464 */
1465
1466 static void __init depca_platform_probe (void)
1467 {
1468 int i;
1469 struct platform_device *pldev;
1470
1471 for (i = 0; depca_io_ports[i].iobase; i++) {
1472 depca_io_ports[i].device = NULL;
1473
1474 /* if an address has been specified on the command
1475 * line, use it (if valid) */
1476 if (io && io != depca_io_ports[i].iobase)
1477 continue;
1478
1479 pldev = platform_device_alloc(depca_string, i);
1480 if (!pldev)
1481 continue;
1482
1483 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1484 depca_io_ports[i].device = pldev;
1485
1486 if (platform_device_add(pldev)) {
1487 depca_io_ports[i].device = NULL;
1488 pldev->dev.platform_data = NULL;
1489 platform_device_put(pldev);
1490 continue;
1491 }
1492
1493 if (!pldev->dev.driver) {
1494 /* The driver was not bound to this device, there was
1495 * no hardware at this address. Unregister it, as the
1496 * release fuction will take care of freeing the
1497 * allocated structure */
1498
1499 depca_io_ports[i].device = NULL;
1500 pldev->dev.platform_data = NULL;
1501 platform_device_unregister (pldev);
1502 }
1503 }
1504 }
1505
1506 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1507 {
1508 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1509 enum depca_type adapter = unknown;
1510 int i;
1511
1512 for (i = 0; mem_base[i]; i++) {
1513 *mem_start = mem ? mem : mem_base[i];
1514 adapter = DepcaSignature (adapter_name, *mem_start);
1515 if (adapter != unknown)
1516 break;
1517 }
1518
1519 return adapter;
1520 }
1521
1522 static int __init depca_isa_probe (struct platform_device *device)
1523 {
1524 struct net_device *dev;
1525 struct depca_private *lp;
1526 u_long ioaddr, mem_start = 0;
1527 enum depca_type adapter = unknown;
1528 int status = 0;
1529
1530 ioaddr = (u_long) device->dev.platform_data;
1531
1532 if ((status = depca_common_init (ioaddr, &dev)))
1533 goto out;
1534
1535 adapter = depca_shmem_probe (&mem_start);
1536
1537 if (adapter == unknown) {
1538 status = -ENODEV;
1539 goto out_free;
1540 }
1541
1542 dev->base_addr = ioaddr;
1543 dev->irq = irq; /* Use whatever value the user gave
1544 * us, and 0 if he didn't. */
1545 lp = netdev_priv(dev);
1546 lp->depca_bus = DEPCA_BUS_ISA;
1547 lp->adapter = adapter;
1548 lp->mem_start = mem_start;
1549
1550 if ((status = depca_hw_init(dev, &device->dev)))
1551 goto out_free;
1552
1553 return 0;
1554
1555 out_free:
1556 free_netdev (dev);
1557 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1558 out:
1559 return status;
1560 }
1561
1562 /*
1563 ** EISA callbacks from sysfs.
1564 */
1565
1566 #ifdef CONFIG_EISA
1567 static int __init depca_eisa_probe (struct device *device)
1568 {
1569 enum depca_type adapter = unknown;
1570 struct eisa_device *edev;
1571 struct net_device *dev;
1572 struct depca_private *lp;
1573 u_long ioaddr, mem_start;
1574 int status = 0;
1575
1576 edev = to_eisa_device (device);
1577 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1578
1579 if ((status = depca_common_init (ioaddr, &dev)))
1580 goto out;
1581
1582 /* It would have been nice to get card configuration from the
1583 * card. Unfortunately, this register is write-only (shares
1584 * it's address with the ethernet prom)... As we don't parse
1585 * the EISA configuration structures (yet... :-), just rely on
1586 * the ISA probing to sort it out... */
1587
1588 adapter = depca_shmem_probe (&mem_start);
1589 if (adapter == unknown) {
1590 status = -ENODEV;
1591 goto out_free;
1592 }
1593
1594 dev->base_addr = ioaddr;
1595 dev->irq = irq;
1596 lp = netdev_priv(dev);
1597 lp->depca_bus = DEPCA_BUS_EISA;
1598 lp->adapter = edev->id.driver_data;
1599 lp->mem_start = mem_start;
1600
1601 if ((status = depca_hw_init(dev, device)))
1602 goto out_free;
1603
1604 return 0;
1605
1606 out_free:
1607 free_netdev (dev);
1608 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1609 out:
1610 return status;
1611 }
1612 #endif
1613
1614 static int __devexit depca_device_remove (struct device *device)
1615 {
1616 struct net_device *dev;
1617 struct depca_private *lp;
1618 int bus;
1619
1620 dev = dev_get_drvdata(device);
1621 lp = netdev_priv(dev);
1622
1623 unregister_netdev (dev);
1624 iounmap (lp->sh_mem);
1625 release_mem_region (lp->mem_start, lp->mem_len);
1626 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1627 bus = lp->depca_bus;
1628 free_netdev (dev);
1629
1630 return 0;
1631 }
1632
1633 /*
1634 ** Look for a particular board name in the on-board Remote Diagnostics
1635 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1636 ** base address.
1637 */
1638 static int __init DepcaSignature(char *name, u_long base_addr)
1639 {
1640 u_int i, j, k;
1641 void __iomem *ptr;
1642 char tmpstr[16];
1643 u_long prom_addr = base_addr + 0xc000;
1644 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1645
1646 /* Can't reserve the prom region, it is already marked as
1647 * used, at least on x86. Instead, reserve a memory region a
1648 * board would certainly use. If it works, go ahead. If not,
1649 * run like hell... */
1650
1651 if (!request_mem_region (mem_addr, 16, depca_string))
1652 return unknown;
1653
1654 /* Copy the first 16 bytes of ROM */
1655
1656 ptr = ioremap(prom_addr, 16);
1657 if (ptr == NULL) {
1658 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1659 return unknown;
1660 }
1661 for (i = 0; i < 16; i++) {
1662 tmpstr[i] = readb(ptr + i);
1663 }
1664 iounmap(ptr);
1665
1666 release_mem_region (mem_addr, 16);
1667
1668 /* Check if PROM contains a valid string */
1669 for (i = 0; *depca_signature[i] != '\0'; i++) {
1670 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1671 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1672 k++;
1673 } else { /* lost signature; begin search again */
1674 k = 0;
1675 }
1676 }
1677 if (k == strlen(depca_signature[i]))
1678 break;
1679 }
1680
1681 /* Check if name string is valid, provided there's no PROM */
1682 if (name && *name && (i == unknown)) {
1683 for (i = 0; *depca_signature[i] != '\0'; i++) {
1684 if (strcmp(name, depca_signature[i]) == 0)
1685 break;
1686 }
1687 }
1688
1689 return i;
1690 }
1691
1692 /*
1693 ** Look for a special sequence in the Ethernet station address PROM that
1694 ** is common across all DEPCA products. Note that the original DEPCA needs
1695 ** its ROM address counter to be initialized and enabled. Only enable
1696 ** if the first address octet is a 0x08 - this minimises the chances of
1697 ** messing around with some other hardware, but it assumes that this DEPCA
1698 ** card initialized itself correctly.
1699 **
1700 ** Search the Ethernet address ROM for the signature. Since the ROM address
1701 ** counter can start at an arbitrary point, the search must include the entire
1702 ** probe sequence length plus the (length_of_the_signature - 1).
1703 ** Stop the search IMMEDIATELY after the signature is found so that the
1704 ** PROM address counter is correctly positioned at the start of the
1705 ** ethernet address for later read out.
1706 */
1707 static int __init DevicePresent(u_long ioaddr)
1708 {
1709 union {
1710 struct {
1711 u32 a;
1712 u32 b;
1713 } llsig;
1714 char Sig[sizeof(u32) << 1];
1715 }
1716 dev;
1717 short sigLength = 0;
1718 s8 data;
1719 s16 nicsr;
1720 int i, j, status = 0;
1721
1722 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1723 data = inb(DEPCA_PROM); /* read data */
1724
1725 if (data == 0x08) { /* Enable counter on DEPCA */
1726 nicsr = inb(DEPCA_NICSR);
1727 nicsr |= AAC;
1728 outb(nicsr, DEPCA_NICSR);
1729 }
1730
1731 dev.llsig.a = ETH_PROM_SIG;
1732 dev.llsig.b = ETH_PROM_SIG;
1733 sigLength = sizeof(u32) << 1;
1734
1735 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1736 data = inb(DEPCA_PROM);
1737 if (dev.Sig[j] == data) { /* track signature */
1738 j++;
1739 } else { /* lost signature; begin search again */
1740 if (data == dev.Sig[0]) { /* rare case.... */
1741 j = 1;
1742 } else {
1743 j = 0;
1744 }
1745 }
1746 }
1747
1748 if (j != sigLength) {
1749 status = -ENODEV; /* search failed */
1750 }
1751
1752 return status;
1753 }
1754
1755 /*
1756 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1757 ** reason: access the upper half of the PROM with x=0; access the lower half
1758 ** with x=1.
1759 */
1760 static int __init get_hw_addr(struct net_device *dev)
1761 {
1762 u_long ioaddr = dev->base_addr;
1763 struct depca_private *lp = netdev_priv(dev);
1764 int i, k, tmp, status = 0;
1765 u_short j, x, chksum;
1766
1767 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1768
1769 for (i = 0, k = 0, j = 0; j < 3; j++) {
1770 k <<= 1;
1771 if (k > 0xffff)
1772 k -= 0xffff;
1773
1774 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1775 dev->dev_addr[i++] = (u_char) tmp;
1776 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1777 dev->dev_addr[i++] = (u_char) tmp;
1778
1779 if (k > 0xffff)
1780 k -= 0xffff;
1781 }
1782 if (k == 0xffff)
1783 k = 0;
1784
1785 chksum = (u_char) inb(DEPCA_PROM + x);
1786 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1787 if (k != chksum)
1788 status = -1;
1789
1790 return status;
1791 }
1792
1793 /*
1794 ** Load a packet into the shared memory
1795 */
1796 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1797 {
1798 struct depca_private *lp = netdev_priv(dev);
1799 int i, entry, end, len, status = NETDEV_TX_OK;
1800
1801 entry = lp->tx_new; /* Ring around buffer number. */
1802 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1803 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1804 /*
1805 ** Caution: the write order is important here... don't set up the
1806 ** ownership rights until all the other information is in place.
1807 */
1808 if (end < entry) { /* wrapped buffer */
1809 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1810 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1811 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1812 } else { /* linear buffer */
1813 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1814 }
1815
1816 /* set up the buffer descriptors */
1817 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1818 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1819 /* clean out flags */
1820 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1821 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1822 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1823 len -= TX_BUFF_SZ;
1824 }
1825 /* clean out flags */
1826 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1827 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1828 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1829
1830 /* start of packet */
1831 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1832 /* end of packet */
1833 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1834
1835 for (i = end; i != entry; --i) {
1836 /* ownership of packet */
1837 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1838 if (i == 0)
1839 i = lp->txRingMask + 1;
1840 }
1841 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1842
1843 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1844 } else {
1845 status = NETDEV_TX_LOCKED;
1846 }
1847
1848 return status;
1849 }
1850
1851 static void depca_dbg_open(struct net_device *dev)
1852 {
1853 struct depca_private *lp = netdev_priv(dev);
1854 u_long ioaddr = dev->base_addr;
1855 struct depca_init *p = &lp->init_block;
1856 int i;
1857
1858 if (depca_debug > 1) {
1859 /* Do not copy the shadow init block into shared memory */
1860 /* Debugging should not affect normal operation! */
1861 /* The shadow init block will get copied across during InitRestartDepca */
1862 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1863 printk("Descriptor head addresses (CPU):\n");
1864 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1865 printk("Descriptor addresses (CPU):\nRX: ");
1866 for (i = 0; i < lp->rxRingMask; i++) {
1867 if (i < 3) {
1868 printk("%p ", &lp->rx_ring[i].base);
1869 }
1870 }
1871 printk("...%p\n", &lp->rx_ring[i].base);
1872 printk("TX: ");
1873 for (i = 0; i < lp->txRingMask; i++) {
1874 if (i < 3) {
1875 printk("%p ", &lp->tx_ring[i].base);
1876 }
1877 }
1878 printk("...%p\n", &lp->tx_ring[i].base);
1879 printk("\nDescriptor buffers (Device):\nRX: ");
1880 for (i = 0; i < lp->rxRingMask; i++) {
1881 if (i < 3) {
1882 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1883 }
1884 }
1885 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1886 printk("TX: ");
1887 for (i = 0; i < lp->txRingMask; i++) {
1888 if (i < 3) {
1889 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1890 }
1891 }
1892 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1893 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1894 printk(" mode: 0x%4.4x\n", p->mode);
1895 printk(" physical address: %pM\n", p->phys_addr);
1896 printk(" multicast hash table: ");
1897 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1898 printk("%2.2x:", p->mcast_table[i]);
1899 }
1900 printk("%2.2x\n", p->mcast_table[i]);
1901 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1902 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1903 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1904 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1905 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1906 outw(CSR2, DEPCA_ADDR);
1907 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1908 outw(CSR1, DEPCA_ADDR);
1909 printk("%4.4x\n", inw(DEPCA_DATA));
1910 outw(CSR3, DEPCA_ADDR);
1911 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1912 }
1913
1914 return;
1915 }
1916
1917 /*
1918 ** Perform IOCTL call functions here. Some are privileged operations and the
1919 ** effective uid is checked in those cases.
1920 ** All multicast IOCTLs will not work here and are for testing purposes only.
1921 */
1922 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1923 {
1924 struct depca_private *lp = netdev_priv(dev);
1925 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1926 int i, status = 0;
1927 u_long ioaddr = dev->base_addr;
1928 union {
1929 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1930 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1931 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1932 } tmp;
1933 unsigned long flags;
1934 void *buf;
1935
1936 switch (ioc->cmd) {
1937 case DEPCA_GET_HWADDR: /* Get the hardware address */
1938 for (i = 0; i < ETH_ALEN; i++) {
1939 tmp.addr[i] = dev->dev_addr[i];
1940 }
1941 ioc->len = ETH_ALEN;
1942 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1943 return -EFAULT;
1944 break;
1945
1946 case DEPCA_SET_HWADDR: /* Set the hardware address */
1947 if (!capable(CAP_NET_ADMIN))
1948 return -EPERM;
1949 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1950 return -EFAULT;
1951 for (i = 0; i < ETH_ALEN; i++) {
1952 dev->dev_addr[i] = tmp.addr[i];
1953 }
1954 netif_stop_queue(dev);
1955 while (lp->tx_old != lp->tx_new)
1956 cpu_relax(); /* Wait for the ring to empty */
1957
1958 STOP_DEPCA; /* Temporarily stop the depca. */
1959 depca_init_ring(dev); /* Initialize the descriptor rings */
1960 LoadCSRs(dev); /* Reload CSR3 */
1961 InitRestartDepca(dev); /* Resume normal operation. */
1962 netif_start_queue(dev); /* Unlock the TX ring */
1963 break;
1964
1965 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1966 if (!capable(CAP_NET_ADMIN))
1967 return -EPERM;
1968 netif_stop_queue(dev);
1969 while (lp->tx_old != lp->tx_new)
1970 cpu_relax(); /* Wait for the ring to empty */
1971
1972 STOP_DEPCA; /* Temporarily stop the depca. */
1973 depca_init_ring(dev); /* Initialize the descriptor rings */
1974 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1975
1976 LoadCSRs(dev); /* Reload CSR3 */
1977 InitRestartDepca(dev); /* Resume normal operation. */
1978 netif_start_queue(dev); /* Unlock the TX ring */
1979 break;
1980
1981 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1982 if (!capable(CAP_NET_ADMIN))
1983 return -EPERM;
1984 netif_stop_queue(dev);
1985 while (lp->tx_old != lp->tx_new)
1986 cpu_relax(); /* Wait for the ring to empty */
1987
1988 STOP_DEPCA; /* Temporarily stop the depca. */
1989 depca_init_ring(dev); /* Initialize the descriptor rings */
1990 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1991
1992 LoadCSRs(dev); /* Reload CSR3 */
1993 InitRestartDepca(dev); /* Resume normal operation. */
1994 netif_start_queue(dev); /* Unlock the TX ring */
1995 break;
1996
1997 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1998 if(!capable(CAP_NET_ADMIN))
1999 return -EPERM;
2000 printk("%s: Boo!\n", dev->name);
2001 break;
2002
2003 case DEPCA_GET_MCA: /* Get the multicast address table */
2004 ioc->len = (HASH_TABLE_LEN >> 3);
2005 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2006 return -EFAULT;
2007 break;
2008
2009 case DEPCA_SET_MCA: /* Set a multicast address */
2010 if (!capable(CAP_NET_ADMIN))
2011 return -EPERM;
2012 if (ioc->len >= HASH_TABLE_LEN)
2013 return -EINVAL;
2014 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2015 return -EFAULT;
2016 set_multicast_list(dev);
2017 break;
2018
2019 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2020 if (!capable(CAP_NET_ADMIN))
2021 return -EPERM;
2022 set_multicast_list(dev);
2023 break;
2024
2025 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2026 if (!capable(CAP_NET_ADMIN))
2027 return -EPERM;
2028 set_multicast_list(dev);
2029 break;
2030
2031 case DEPCA_GET_STATS: /* Get the driver statistics */
2032 ioc->len = sizeof(lp->pktStats);
2033 buf = kmalloc(ioc->len, GFP_KERNEL);
2034 if(!buf)
2035 return -ENOMEM;
2036 spin_lock_irqsave(&lp->lock, flags);
2037 memcpy(buf, &lp->pktStats, ioc->len);
2038 spin_unlock_irqrestore(&lp->lock, flags);
2039 if (copy_to_user(ioc->data, buf, ioc->len))
2040 status = -EFAULT;
2041 kfree(buf);
2042 break;
2043
2044 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2045 if (!capable(CAP_NET_ADMIN))
2046 return -EPERM;
2047 spin_lock_irqsave(&lp->lock, flags);
2048 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2049 spin_unlock_irqrestore(&lp->lock, flags);
2050 break;
2051
2052 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2053 i = 0;
2054 tmp.sval[i++] = inw(DEPCA_NICSR);
2055 outw(CSR0, DEPCA_ADDR); /* status register */
2056 tmp.sval[i++] = inw(DEPCA_DATA);
2057 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2058 ioc->len = i + sizeof(struct depca_init);
2059 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2060 return -EFAULT;
2061 break;
2062
2063 default:
2064 return -EOPNOTSUPP;
2065 }
2066
2067 return status;
2068 }
2069
2070 static int __init depca_module_init (void)
2071 {
2072 int err = 0;
2073
2074 #ifdef CONFIG_MCA
2075 err = mca_register_driver (&depca_mca_driver);
2076 #endif
2077 #ifdef CONFIG_EISA
2078 err |= eisa_driver_register (&depca_eisa_driver);
2079 #endif
2080 err |= platform_driver_register (&depca_isa_driver);
2081 depca_platform_probe ();
2082
2083 return err;
2084 }
2085
2086 static void __exit depca_module_exit (void)
2087 {
2088 int i;
2089 #ifdef CONFIG_MCA
2090 mca_unregister_driver (&depca_mca_driver);
2091 #endif
2092 #ifdef CONFIG_EISA
2093 eisa_driver_unregister (&depca_eisa_driver);
2094 #endif
2095 platform_driver_unregister (&depca_isa_driver);
2096
2097 for (i = 0; depca_io_ports[i].iobase; i++) {
2098 if (depca_io_ports[i].device) {
2099 depca_io_ports[i].device->dev.platform_data = NULL;
2100 platform_device_unregister (depca_io_ports[i].device);
2101 depca_io_ports[i].device = NULL;
2102 }
2103 }
2104 }
2105
2106 module_init (depca_module_init);
2107 module_exit (depca_module_exit);
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