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Now it works.
[cbs-scheduler.git] / drivers / net / depca.c
blobe4cef491dc73fc8d6486b98976d9b937b12399ad
1 /* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
2
3 Written 1994, 1995 by David C. Davies.
4
5
6 Copyright 1994 David C. Davies
7 and
8 United States Government
9 (as represented by the Director, National Security Agency).
10
11 Copyright 1995 Digital Equipment Corporation.
12
13
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
16
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
19
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
28
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
31
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
36
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
39
40 The author may be reached at davies@maniac.ultranet.com
41
42 =========================================================================
43
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
48
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
64
65
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
68
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
79
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
84
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
97
98 ************************************************************************
99
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
107
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
110
111 ************************************************************************
112
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
117
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
121
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
124
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
140 7) enjoy!
141
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
144
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
147
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
151 option will not work with kernel built-in depca's.
152
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
156
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
160 fully stress-tested).
161
162 Currently known bugs/limitations:
163
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
169
170 ************************************************************************
171 TO DO:
172 ------
173
174
175 Revision History
176 ----------------
177
178 Version Date Description
179
180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
201 0.385 3-apr-95 Fix a recognition bug reported by
202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
211 Both above from a suggestion by
212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
221 by <tymm@computer.org>
222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
234
235 =========================================================================
236 */
237
238 #include <linux/module.h>
239 #include <linux/kernel.h>
240 #include <linux/string.h>
241 #include <linux/errno.h>
242 #include <linux/ioport.h>
243 #include <linux/slab.h>
244 #include <linux/interrupt.h>
245 #include <linux/delay.h>
246 #include <linux/init.h>
247 #include <linux/crc32.h>
248 #include <linux/netdevice.h>
249 #include <linux/etherdevice.h>
250 #include <linux/skbuff.h>
251 #include <linux/time.h>
252 #include <linux/types.h>
253 #include <linux/unistd.h>
254 #include <linux/ctype.h>
255 #include <linux/moduleparam.h>
256 #include <linux/platform_device.h>
257 #include <linux/bitops.h>
258
259 #include <asm/uaccess.h>
260 #include <asm/io.h>
261 #include <asm/dma.h>
262
263 #ifdef CONFIG_MCA
264 #include <linux/mca.h>
265 #endif
266
267 #ifdef CONFIG_EISA
268 #include <linux/eisa.h>
269 #endif
270
271 #include "depca.h"
272
273 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
274
275 #ifdef DEPCA_DEBUG
276 static int depca_debug = DEPCA_DEBUG;
277 #else
278 static int depca_debug = 1;
279 #endif
280
281 #define DEPCA_NDA 0xffe0 /* No Device Address */
282
283 #define TX_TIMEOUT (1*HZ)
284
285 /*
286 ** Ethernet PROM defines
287 */
288 #define PROBE_LENGTH 32
289 #define ETH_PROM_SIG 0xAA5500FFUL
290
291 /*
292 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
293 ** here is <= to the amount of shared memory set up by the board switches.
294 ** The number of descriptors MUST BE A POWER OF 2.
295 **
296 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
297 */
298 #define NUM_RX_DESC 8 /* Number of RX descriptors */
299 #define NUM_TX_DESC 8 /* Number of TX descriptors */
300 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
301 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
302
303 /*
304 ** EISA bus defines
305 */
306 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
307
308 /*
309 ** ISA Bus defines
310 */
311 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
312 #define DEPCA_TOTAL_SIZE 0x10
313
314 static struct {
315 u_long iobase;
316 struct platform_device *device;
317 } depca_io_ports[] = {
318 { 0x300, NULL },
319 { 0x200, NULL },
320 { 0 , NULL },
321 };
322
323 /*
324 ** Name <-> Adapter mapping
325 */
326 #define DEPCA_SIGNATURE {"DEPCA",\
327 "DE100","DE101",\
328 "DE200","DE201","DE202",\
329 "DE210","DE212",\
330 "DE422",\
331 ""}
332
333 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
334
335 enum depca_type {
336 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
337 };
338
339 static char depca_string[] = "depca";
340
341 static int depca_device_remove (struct device *device);
342
343 #ifdef CONFIG_EISA
344 static struct eisa_device_id depca_eisa_ids[] = {
345 { "DEC4220", de422 },
346 { "" }
347 };
348 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
349
350 static int depca_eisa_probe (struct device *device);
351
352 static struct eisa_driver depca_eisa_driver = {
353 .id_table = depca_eisa_ids,
354 .driver = {
355 .name = depca_string,
356 .probe = depca_eisa_probe,
357 .remove = __devexit_p (depca_device_remove)
358 }
359 };
360 #endif
361
362 #ifdef CONFIG_MCA
363 /*
364 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
365 */
366 #define DE210_ID 0x628d
367 #define DE212_ID 0x6def
368
369 static short depca_mca_adapter_ids[] = {
370 DE210_ID,
371 DE212_ID,
372 0x0000
373 };
374
375 static char *depca_mca_adapter_name[] = {
376 "DEC EtherWORKS MC Adapter (DE210)",
377 "DEC EtherWORKS MC Adapter (DE212)",
378 NULL
379 };
380
381 static enum depca_type depca_mca_adapter_type[] = {
382 de210,
383 de212,
384 0
385 };
386
387 static int depca_mca_probe (struct device *);
388
389 static struct mca_driver depca_mca_driver = {
390 .id_table = depca_mca_adapter_ids,
391 .driver = {
392 .name = depca_string,
393 .bus = &mca_bus_type,
394 .probe = depca_mca_probe,
395 .remove = __devexit_p(depca_device_remove),
396 },
397 };
398 #endif
399
400 static int depca_isa_probe (struct platform_device *);
401
402 static int __devexit depca_isa_remove(struct platform_device *pdev)
403 {
404 return depca_device_remove(&pdev->dev);
405 }
406
407 static struct platform_driver depca_isa_driver = {
408 .probe = depca_isa_probe,
409 .remove = __devexit_p(depca_isa_remove),
410 .driver = {
411 .name = depca_string,
412 },
413 };
414
415 /*
416 ** Miscellaneous info...
417 */
418 #define DEPCA_STRLEN 16
419
420 /*
421 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
422 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
423 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
424 ** and hence the RX descriptor ring's first entry.
425 */
426 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
427 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
428 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
429
430 /*
431 ** The DEPCA Rx and Tx ring descriptors.
432 */
433 struct depca_rx_desc {
434 volatile s32 base;
435 s16 buf_length; /* This length is negative 2's complement! */
436 s16 msg_length; /* This length is "normal". */
437 };
438
439 struct depca_tx_desc {
440 volatile s32 base;
441 s16 length; /* This length is negative 2's complement! */
442 s16 misc; /* Errors and TDR info */
443 };
444
445 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
446 to LANCE memory address space */
447
448 /*
449 ** The Lance initialization block, described in databook, in common memory.
450 */
451 struct depca_init {
452 u16 mode; /* Mode register */
453 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
454 u8 mcast_table[8]; /* Multicast Hash Table. */
455 u32 rx_ring; /* Rx ring base pointer & ring length */
456 u32 tx_ring; /* Tx ring base pointer & ring length */
457 };
458
459 #define DEPCA_PKT_STAT_SZ 16
460 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
461 increase DEPCA_PKT_STAT_SZ */
462 struct depca_private {
463 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
464 enum depca_type adapter; /* Adapter type */
465 enum {
466 DEPCA_BUS_MCA = 1,
467 DEPCA_BUS_ISA,
468 DEPCA_BUS_EISA,
469 } depca_bus; /* type of bus */
470 struct depca_init init_block; /* Shadow Initialization block */
471 /* CPU address space fields */
472 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
473 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
474 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
475 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
477 u_long mem_start; /* Bus address of device RAM (before remap) */
478 u_long mem_len; /* device memory size */
479 /* Device address space fields */
480 u_long device_ram_start; /* Start of RAM in device addr space */
481 /* Offsets used in both address spaces */
482 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
483 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
484 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
485 /* Kernel-only (not device) fields */
486 int rx_new, tx_new; /* The next free ring entry */
487 int rx_old, tx_old; /* The ring entries to be free()ed. */
488 spinlock_t lock;
489 struct { /* Private stats counters */
490 u32 bins[DEPCA_PKT_STAT_SZ];
491 u32 unicast;
492 u32 multicast;
493 u32 broadcast;
494 u32 excessive_collisions;
495 u32 tx_underruns;
496 u32 excessive_underruns;
497 } pktStats;
498 int txRingMask; /* TX ring mask */
499 int rxRingMask; /* RX ring mask */
500 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
501 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
502 };
503
504 /*
505 ** The transmit ring full condition is described by the tx_old and tx_new
506 ** pointers by:
507 ** tx_old = tx_new Empty ring
508 ** tx_old = tx_new+1 Full ring
509 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
510 */
511 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
512 lp->tx_old+lp->txRingMask-lp->tx_new:\
513 lp->tx_old -lp->tx_new-1)
514
515 /*
516 ** Public Functions
517 */
518 static int depca_open(struct net_device *dev);
519 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
520 static irqreturn_t depca_interrupt(int irq, void *dev_id);
521 static int depca_close(struct net_device *dev);
522 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
523 static void depca_tx_timeout(struct net_device *dev);
524 static void set_multicast_list(struct net_device *dev);
525
526 /*
527 ** Private functions
528 */
529 static void depca_init_ring(struct net_device *dev);
530 static int depca_rx(struct net_device *dev);
531 static int depca_tx(struct net_device *dev);
532
533 static void LoadCSRs(struct net_device *dev);
534 static int InitRestartDepca(struct net_device *dev);
535 static int DepcaSignature(char *name, u_long paddr);
536 static int DevicePresent(u_long ioaddr);
537 static int get_hw_addr(struct net_device *dev);
538 static void SetMulticastFilter(struct net_device *dev);
539 static int load_packet(struct net_device *dev, struct sk_buff *skb);
540 static void depca_dbg_open(struct net_device *dev);
541
542 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
543 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
544 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
545 static u_char *depca_irq;
546
547 static int irq;
548 static int io;
549 static char *adapter_name;
550 static int mem; /* For loadable module assignment
551 use insmod mem=0x????? .... */
552 module_param (irq, int, 0);
553 module_param (io, int, 0);
554 module_param (adapter_name, charp, 0);
555 module_param (mem, int, 0);
556 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
557 MODULE_PARM_DESC(io, "DEPCA I/O base address");
558 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
559 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
560 MODULE_LICENSE("GPL");
561
562 /*
563 ** Miscellaneous defines...
564 */
565 #define STOP_DEPCA \
566 outw(CSR0, DEPCA_ADDR);\
567 outw(STOP, DEPCA_DATA)
568
569 static int __init depca_hw_init (struct net_device *dev, struct device *device)
570 {
571 struct depca_private *lp;
572 int i, j, offset, netRAM, mem_len, status = 0;
573 s16 nicsr;
574 u_long ioaddr;
575 u_long mem_start;
576
577 /*
578 * We are now supposed to enter this function with the
579 * following fields filled with proper values :
580 *
581 * dev->base_addr
582 * lp->mem_start
583 * lp->depca_bus
584 * lp->adapter
585 *
586 * dev->irq can be set if known from device configuration (on
587 * MCA or EISA) or module option. Otherwise, it will be auto
588 * detected.
589 */
590
591 ioaddr = dev->base_addr;
592
593 STOP_DEPCA;
594
595 nicsr = inb(DEPCA_NICSR);
596 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
597 outb(nicsr, DEPCA_NICSR);
598
599 if (inw(DEPCA_DATA) != STOP) {
600 return -ENXIO;
601 }
602
603 lp = netdev_priv(dev);
604 mem_start = lp->mem_start;
605
606 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
607 return -ENXIO;
608
609 printk ("%s: %s at 0x%04lx",
610 device->bus_id, depca_signature[lp->adapter], ioaddr);
611
612 switch (lp->depca_bus) {
613 #ifdef CONFIG_MCA
614 case DEPCA_BUS_MCA:
615 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
616 break;
617 #endif
618
619 #ifdef CONFIG_EISA
620 case DEPCA_BUS_EISA:
621 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
622 break;
623 #endif
624
625 case DEPCA_BUS_ISA:
626 break;
627
628 default:
629 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
630 return -ENXIO;
631 }
632
633 printk(", h/w address ");
634 status = get_hw_addr(dev);
635 printk("%pM", dev->dev_addr);
636 if (status != 0) {
637 printk(" which has an Ethernet PROM CRC error.\n");
638 return -ENXIO;
639 }
640
641 /* Set up the maximum amount of network RAM(kB) */
642 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
643 if ((nicsr & _128KB) && (lp->adapter == de422))
644 netRAM = 128;
645
646 /* Shared Memory Base Address */
647 if (nicsr & BUF) {
648 nicsr &= ~BS; /* DEPCA RAM in top 32k */
649 netRAM -= 32;
650
651 /* Only EISA/ISA needs start address to be re-computed */
652 if (lp->depca_bus != DEPCA_BUS_MCA)
653 mem_start += 0x8000;
654 }
655
656 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)))
657 > (netRAM << 10)) {
658 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
659 return -ENXIO;
660 }
661
662 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
663
664 /* Enable the shadow RAM. */
665 if (lp->adapter != DEPCA) {
666 nicsr |= SHE;
667 outb(nicsr, DEPCA_NICSR);
668 }
669
670 spin_lock_init(&lp->lock);
671 sprintf(lp->adapter_name, "%s (%s)",
672 depca_signature[lp->adapter], device->bus_id);
673 status = -EBUSY;
674
675 /* Initialisation Block */
676 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
677 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
678 goto out_priv;
679 }
680
681 status = -EIO;
682 lp->sh_mem = ioremap(mem_start, mem_len);
683 if (lp->sh_mem == NULL) {
684 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
685 goto out1;
686 }
687
688 lp->mem_start = mem_start;
689 lp->mem_len = mem_len;
690 lp->device_ram_start = mem_start & LA_MASK;
691
692 offset = 0;
693 offset += sizeof(struct depca_init);
694
695 /* Tx & Rx descriptors (aligned to a quadword boundary) */
696 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
697 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
698 lp->rx_ring_offset = offset;
699
700 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
701 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
702 lp->tx_ring_offset = offset;
703
704 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
705
706 lp->buffs_offset = offset;
707
708 /* Finish initialising the ring information. */
709 lp->rxRingMask = NUM_RX_DESC - 1;
710 lp->txRingMask = NUM_TX_DESC - 1;
711
712 /* Calculate Tx/Rx RLEN size for the descriptors. */
713 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
714 j >>= 1;
715 }
716 lp->rx_rlen = (s32) (i << 29);
717 for (i = 0, j = lp->txRingMask; j > 0; i++) {
718 j >>= 1;
719 }
720 lp->tx_rlen = (s32) (i << 29);
721
722 /* Load the initialisation block */
723 depca_init_ring(dev);
724
725 /* Initialise the control and status registers */
726 LoadCSRs(dev);
727
728 /* Enable DEPCA board interrupts for autoprobing */
729 nicsr = ((nicsr & ~IM) | IEN);
730 outb(nicsr, DEPCA_NICSR);
731
732 /* To auto-IRQ we enable the initialization-done and DMA err,
733 interrupts. For now we will always get a DMA error. */
734 if (dev->irq < 2) {
735 unsigned char irqnum;
736 unsigned long irq_mask, delay;
737
738 irq_mask = probe_irq_on();
739
740 /* Assign the correct irq list */
741 switch (lp->adapter) {
742 case DEPCA:
743 case de100:
744 case de101:
745 depca_irq = de1xx_irq;
746 break;
747 case de200:
748 case de201:
749 case de202:
750 case de210:
751 case de212:
752 depca_irq = de2xx_irq;
753 break;
754 case de422:
755 depca_irq = de422_irq;
756 break;
757
758 default:
759 break; /* Not reached */
760 }
761
762 /* Trigger an initialization just for the interrupt. */
763 outw(INEA | INIT, DEPCA_DATA);
764
765 delay = jiffies + HZ/50;
766 while (time_before(jiffies, delay))
767 yield();
768
769 irqnum = probe_irq_off(irq_mask);
770
771 status = -ENXIO;
772 if (!irqnum) {
773 printk(" and failed to detect IRQ line.\n");
774 goto out2;
775 } else {
776 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
777 if (irqnum == depca_irq[i]) {
778 dev->irq = irqnum;
779 printk(" and uses IRQ%d.\n", dev->irq);
780 }
781
782 if (!dev->irq) {
783 printk(" but incorrect IRQ line detected.\n");
784 goto out2;
785 }
786 }
787 } else {
788 printk(" and assigned IRQ%d.\n", dev->irq);
789 }
790
791 if (depca_debug > 1) {
792 printk(version);
793 }
794
795 /* The DEPCA-specific entries in the device structure. */
796 dev->open = &depca_open;
797 dev->hard_start_xmit = &depca_start_xmit;
798 dev->stop = &depca_close;
799 dev->set_multicast_list = &set_multicast_list;
800 dev->do_ioctl = &depca_ioctl;
801 dev->tx_timeout = depca_tx_timeout;
802 dev->watchdog_timeo = TX_TIMEOUT;
803
804 dev->mem_start = 0;
805
806 device->driver_data = dev;
807 SET_NETDEV_DEV (dev, device);
808
809 status = register_netdev(dev);
810 if (status == 0)
811 return 0;
812 out2:
813 iounmap(lp->sh_mem);
814 out1:
815 release_mem_region (mem_start, mem_len);
816 out_priv:
817 return status;
818 }
819
820
821 static int depca_open(struct net_device *dev)
822 {
823 struct depca_private *lp = netdev_priv(dev);
824 u_long ioaddr = dev->base_addr;
825 s16 nicsr;
826 int status = 0;
827
828 STOP_DEPCA;
829 nicsr = inb(DEPCA_NICSR);
830
831 /* Make sure the shadow RAM is enabled */
832 if (lp->adapter != DEPCA) {
833 nicsr |= SHE;
834 outb(nicsr, DEPCA_NICSR);
835 }
836
837 /* Re-initialize the DEPCA... */
838 depca_init_ring(dev);
839 LoadCSRs(dev);
840
841 depca_dbg_open(dev);
842
843 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
844 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
845 status = -EAGAIN;
846 } else {
847
848 /* Enable DEPCA board interrupts and turn off LED */
849 nicsr = ((nicsr & ~IM & ~LED) | IEN);
850 outb(nicsr, DEPCA_NICSR);
851 outw(CSR0, DEPCA_ADDR);
852
853 netif_start_queue(dev);
854
855 status = InitRestartDepca(dev);
856
857 if (depca_debug > 1) {
858 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
859 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
860 }
861 }
862 return status;
863 }
864
865 /* Initialize the lance Rx and Tx descriptor rings. */
866 static void depca_init_ring(struct net_device *dev)
867 {
868 struct depca_private *lp = netdev_priv(dev);
869 u_int i;
870 u_long offset;
871
872 /* Lock out other processes whilst setting up the hardware */
873 netif_stop_queue(dev);
874
875 lp->rx_new = lp->tx_new = 0;
876 lp->rx_old = lp->tx_old = 0;
877
878 /* Initialize the base address and length of each buffer in the ring */
879 for (i = 0; i <= lp->rxRingMask; i++) {
880 offset = lp->buffs_offset + i * RX_BUFF_SZ;
881 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
882 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
883 lp->rx_buff[i] = lp->sh_mem + offset;
884 }
885
886 for (i = 0; i <= lp->txRingMask; i++) {
887 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
888 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
889 lp->tx_buff[i] = lp->sh_mem + offset;
890 }
891
892 /* Set up the initialization block */
893 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
894 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
895
896 SetMulticastFilter(dev);
897
898 for (i = 0; i < ETH_ALEN; i++) {
899 lp->init_block.phys_addr[i] = dev->dev_addr[i];
900 }
901
902 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
903 }
904
905
906 static void depca_tx_timeout(struct net_device *dev)
907 {
908 u_long ioaddr = dev->base_addr;
909
910 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
911
912 STOP_DEPCA;
913 depca_init_ring(dev);
914 LoadCSRs(dev);
915 dev->trans_start = jiffies;
916 netif_wake_queue(dev);
917 InitRestartDepca(dev);
918 }
919
920
921 /*
922 ** Writes a socket buffer to TX descriptor ring and starts transmission
923 */
924 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
925 {
926 struct depca_private *lp = netdev_priv(dev);
927 u_long ioaddr = dev->base_addr;
928 int status = 0;
929
930 /* Transmitter timeout, serious problems. */
931 if (skb->len < 1)
932 goto out;
933
934 if (skb_padto(skb, ETH_ZLEN))
935 goto out;
936
937 netif_stop_queue(dev);
938
939 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
940 status = load_packet(dev, skb);
941
942 if (!status) {
943 /* Trigger an immediate send demand. */
944 outw(CSR0, DEPCA_ADDR);
945 outw(INEA | TDMD, DEPCA_DATA);
946
947 dev->trans_start = jiffies;
948 dev_kfree_skb(skb);
949 }
950 if (TX_BUFFS_AVAIL)
951 netif_start_queue(dev);
952 } else
953 status = -1;
954
955 out:
956 return status;
957 }
958
959 /*
960 ** The DEPCA interrupt handler.
961 */
962 static irqreturn_t depca_interrupt(int irq, void *dev_id)
963 {
964 struct net_device *dev = dev_id;
965 struct depca_private *lp;
966 s16 csr0, nicsr;
967 u_long ioaddr;
968
969 if (dev == NULL) {
970 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
971 return IRQ_NONE;
972 }
973
974 lp = netdev_priv(dev);
975 ioaddr = dev->base_addr;
976
977 spin_lock(&lp->lock);
978
979 /* mask the DEPCA board interrupts and turn on the LED */
980 nicsr = inb(DEPCA_NICSR);
981 nicsr |= (IM | LED);
982 outb(nicsr, DEPCA_NICSR);
983
984 outw(CSR0, DEPCA_ADDR);
985 csr0 = inw(DEPCA_DATA);
986
987 /* Acknowledge all of the current interrupt sources ASAP. */
988 outw(csr0 & INTE, DEPCA_DATA);
989
990 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
991 depca_rx(dev);
992
993 if (csr0 & TINT) /* Tx interrupt (packet sent) */
994 depca_tx(dev);
995
996 /* Any resources available? */
997 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
998 netif_wake_queue(dev);
999 }
1000
1001 /* Unmask the DEPCA board interrupts and turn off the LED */
1002 nicsr = (nicsr & ~IM & ~LED);
1003 outb(nicsr, DEPCA_NICSR);
1004
1005 spin_unlock(&lp->lock);
1006 return IRQ_HANDLED;
1007 }
1008
1009 /* Called with lp->lock held */
1010 static int depca_rx(struct net_device *dev)
1011 {
1012 struct depca_private *lp = netdev_priv(dev);
1013 int i, entry;
1014 s32 status;
1015
1016 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1017 status = readl(&lp->rx_ring[entry].base) >> 16;
1018 if (status & R_STP) { /* Remember start of frame */
1019 lp->rx_old = entry;
1020 }
1021 if (status & R_ENP) { /* Valid frame status */
1022 if (status & R_ERR) { /* There was an error. */
1023 dev->stats.rx_errors++; /* Update the error stats. */
1024 if (status & R_FRAM)
1025 dev->stats.rx_frame_errors++;
1026 if (status & R_OFLO)
1027 dev->stats.rx_over_errors++;
1028 if (status & R_CRC)
1029 dev->stats.rx_crc_errors++;
1030 if (status & R_BUFF)
1031 dev->stats.rx_fifo_errors++;
1032 } else {
1033 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1034 struct sk_buff *skb;
1035
1036 skb = dev_alloc_skb(pkt_len + 2);
1037 if (skb != NULL) {
1038 unsigned char *buf;
1039 skb_reserve(skb, 2); /* 16 byte align the IP header */
1040 buf = skb_put(skb, pkt_len);
1041 if (entry < lp->rx_old) { /* Wrapped buffer */
1042 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1043 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1044 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1045 } else { /* Linear buffer */
1046 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1047 }
1048
1049 /*
1050 ** Notify the upper protocol layers that there is another
1051 ** packet to handle
1052 */
1053 skb->protocol = eth_type_trans(skb, dev);
1054 netif_rx(skb);
1055
1056 /*
1057 ** Update stats
1058 */
1059 dev->stats.rx_packets++;
1060 dev->stats.rx_bytes += pkt_len;
1061 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1062 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1063 lp->pktStats.bins[i]++;
1064 i = DEPCA_PKT_STAT_SZ;
1065 }
1066 }
1067 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1068 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1069 lp->pktStats.broadcast++;
1070 } else {
1071 lp->pktStats.multicast++;
1072 }
1073 } 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])) {
1074 lp->pktStats.unicast++;
1075 }
1076
1077 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1078 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1079 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1080 }
1081 } else {
1082 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1083 dev->stats.rx_dropped++; /* Really, deferred. */
1084 break;
1085 }
1086 }
1087 /* Change buffer ownership for this last frame, back to the adapter */
1088 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1089 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1090 }
1091 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1092 }
1093
1094 /*
1095 ** Update entry information
1096 */
1097 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1098 }
1099
1100 return 0;
1101 }
1102
1103 /*
1104 ** Buffer sent - check for buffer errors.
1105 ** Called with lp->lock held
1106 */
1107 static int depca_tx(struct net_device *dev)
1108 {
1109 struct depca_private *lp = netdev_priv(dev);
1110 int entry;
1111 s32 status;
1112 u_long ioaddr = dev->base_addr;
1113
1114 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1115 status = readl(&lp->tx_ring[entry].base) >> 16;
1116
1117 if (status < 0) { /* Packet not yet sent! */
1118 break;
1119 } else if (status & T_ERR) { /* An error occurred. */
1120 status = readl(&lp->tx_ring[entry].misc);
1121 dev->stats.tx_errors++;
1122 if (status & TMD3_RTRY)
1123 dev->stats.tx_aborted_errors++;
1124 if (status & TMD3_LCAR)
1125 dev->stats.tx_carrier_errors++;
1126 if (status & TMD3_LCOL)
1127 dev->stats.tx_window_errors++;
1128 if (status & TMD3_UFLO)
1129 dev->stats.tx_fifo_errors++;
1130 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1131 /* Trigger an immediate send demand. */
1132 outw(CSR0, DEPCA_ADDR);
1133 outw(INEA | TDMD, DEPCA_DATA);
1134 }
1135 } else if (status & (T_MORE | T_ONE)) {
1136 dev->stats.collisions++;
1137 } else {
1138 dev->stats.tx_packets++;
1139 }
1140
1141 /* Update all the pointers */
1142 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1143 }
1144
1145 return 0;
1146 }
1147
1148 static int depca_close(struct net_device *dev)
1149 {
1150 struct depca_private *lp = netdev_priv(dev);
1151 s16 nicsr;
1152 u_long ioaddr = dev->base_addr;
1153
1154 netif_stop_queue(dev);
1155
1156 outw(CSR0, DEPCA_ADDR);
1157
1158 if (depca_debug > 1) {
1159 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1160 }
1161
1162 /*
1163 ** We stop the DEPCA here -- it occasionally polls
1164 ** memory if we don't.
1165 */
1166 outw(STOP, DEPCA_DATA);
1167
1168 /*
1169 ** Give back the ROM in case the user wants to go to DOS
1170 */
1171 if (lp->adapter != DEPCA) {
1172 nicsr = inb(DEPCA_NICSR);
1173 nicsr &= ~SHE;
1174 outb(nicsr, DEPCA_NICSR);
1175 }
1176
1177 /*
1178 ** Free the associated irq
1179 */
1180 free_irq(dev->irq, dev);
1181 return 0;
1182 }
1183
1184 static void LoadCSRs(struct net_device *dev)
1185 {
1186 struct depca_private *lp = netdev_priv(dev);
1187 u_long ioaddr = dev->base_addr;
1188
1189 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1190 outw((u16) lp->device_ram_start, DEPCA_DATA);
1191 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1192 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1193 outw(CSR3, DEPCA_ADDR); /* ALE control */
1194 outw(ACON, DEPCA_DATA);
1195
1196 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1197
1198 return;
1199 }
1200
1201 static int InitRestartDepca(struct net_device *dev)
1202 {
1203 struct depca_private *lp = netdev_priv(dev);
1204 u_long ioaddr = dev->base_addr;
1205 int i, status = 0;
1206
1207 /* Copy the shadow init_block to shared memory */
1208 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1209
1210 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1211 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1212
1213 /* wait for lance to complete initialisation */
1214 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1215
1216 if (i != 100) {
1217 /* clear IDON by writing a "1", enable interrupts and start lance */
1218 outw(IDON | INEA | STRT, DEPCA_DATA);
1219 if (depca_debug > 2) {
1220 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1221 }
1222 } else {
1223 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1224 status = -1;
1225 }
1226
1227 return status;
1228 }
1229
1230 /*
1231 ** Set or clear the multicast filter for this adaptor.
1232 */
1233 static void set_multicast_list(struct net_device *dev)
1234 {
1235 struct depca_private *lp = netdev_priv(dev);
1236 u_long ioaddr = dev->base_addr;
1237
1238 netif_stop_queue(dev);
1239 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1240
1241 STOP_DEPCA; /* Temporarily stop the depca. */
1242 depca_init_ring(dev); /* Initialize the descriptor rings */
1243
1244 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1245 lp->init_block.mode |= PROM;
1246 } else {
1247 SetMulticastFilter(dev);
1248 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1249 }
1250
1251 LoadCSRs(dev); /* Reload CSR3 */
1252 InitRestartDepca(dev); /* Resume normal operation. */
1253 netif_start_queue(dev); /* Unlock the TX ring */
1254 }
1255
1256 /*
1257 ** Calculate the hash code and update the logical address filter
1258 ** from a list of ethernet multicast addresses.
1259 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1260 ** LANCE calculates its hash codes big endian.
1261 */
1262 static void SetMulticastFilter(struct net_device *dev)
1263 {
1264 struct depca_private *lp = netdev_priv(dev);
1265 struct dev_mc_list *dmi = dev->mc_list;
1266 char *addrs;
1267 int i, j, bit, byte;
1268 u16 hashcode;
1269 u32 crc;
1270
1271 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1272 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1273 lp->init_block.mcast_table[i] = (char) 0xff;
1274 }
1275 } else {
1276 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1277 lp->init_block.mcast_table[i] = 0;
1278 }
1279 /* Add multicast addresses */
1280 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1281 addrs = dmi->dmi_addr;
1282 dmi = dmi->next;
1283 if ((*addrs & 0x01) == 1) { /* multicast address? */
1284 crc = ether_crc(ETH_ALEN, addrs);
1285 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1286 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1287 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1288 }
1289
1290
1291 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1292 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1293 lp->init_block.mcast_table[byte] |= bit;
1294 }
1295 }
1296 }
1297
1298 return;
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 fuction 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 __init 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 = device->driver_data;
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 = 0;
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 = -1;
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 return;
1905 }
1906
1907 /*
1908 ** Perform IOCTL call functions here. Some are privileged operations and the
1909 ** effective uid is checked in those cases.
1910 ** All multicast IOCTLs will not work here and are for testing purposes only.
1911 */
1912 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1913 {
1914 struct depca_private *lp = netdev_priv(dev);
1915 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1916 int i, status = 0;
1917 u_long ioaddr = dev->base_addr;
1918 union {
1919 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1920 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1921 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1922 } tmp;
1923 unsigned long flags;
1924 void *buf;
1925
1926 switch (ioc->cmd) {
1927 case DEPCA_GET_HWADDR: /* Get the hardware address */
1928 for (i = 0; i < ETH_ALEN; i++) {
1929 tmp.addr[i] = dev->dev_addr[i];
1930 }
1931 ioc->len = ETH_ALEN;
1932 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1933 return -EFAULT;
1934 break;
1935
1936 case DEPCA_SET_HWADDR: /* Set the hardware address */
1937 if (!capable(CAP_NET_ADMIN))
1938 return -EPERM;
1939 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1940 return -EFAULT;
1941 for (i = 0; i < ETH_ALEN; i++) {
1942 dev->dev_addr[i] = tmp.addr[i];
1943 }
1944 netif_stop_queue(dev);
1945 while (lp->tx_old != lp->tx_new)
1946 cpu_relax(); /* Wait for the ring to empty */
1947
1948 STOP_DEPCA; /* Temporarily stop the depca. */
1949 depca_init_ring(dev); /* Initialize the descriptor rings */
1950 LoadCSRs(dev); /* Reload CSR3 */
1951 InitRestartDepca(dev); /* Resume normal operation. */
1952 netif_start_queue(dev); /* Unlock the TX ring */
1953 break;
1954
1955 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1956 if (!capable(CAP_NET_ADMIN))
1957 return -EPERM;
1958 netif_stop_queue(dev);
1959 while (lp->tx_old != lp->tx_new)
1960 cpu_relax(); /* Wait for the ring to empty */
1961
1962 STOP_DEPCA; /* Temporarily stop the depca. */
1963 depca_init_ring(dev); /* Initialize the descriptor rings */
1964 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1965
1966 LoadCSRs(dev); /* Reload CSR3 */
1967 InitRestartDepca(dev); /* Resume normal operation. */
1968 netif_start_queue(dev); /* Unlock the TX ring */
1969 break;
1970
1971 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1972 if (!capable(CAP_NET_ADMIN))
1973 return -EPERM;
1974 netif_stop_queue(dev);
1975 while (lp->tx_old != lp->tx_new)
1976 cpu_relax(); /* Wait for the ring to empty */
1977
1978 STOP_DEPCA; /* Temporarily stop the depca. */
1979 depca_init_ring(dev); /* Initialize the descriptor rings */
1980 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1981
1982 LoadCSRs(dev); /* Reload CSR3 */
1983 InitRestartDepca(dev); /* Resume normal operation. */
1984 netif_start_queue(dev); /* Unlock the TX ring */
1985 break;
1986
1987 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1988 if(!capable(CAP_NET_ADMIN))
1989 return -EPERM;
1990 printk("%s: Boo!\n", dev->name);
1991 break;
1992
1993 case DEPCA_GET_MCA: /* Get the multicast address table */
1994 ioc->len = (HASH_TABLE_LEN >> 3);
1995 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
1996 return -EFAULT;
1997 break;
1998
1999 case DEPCA_SET_MCA: /* Set a multicast address */
2000 if (!capable(CAP_NET_ADMIN))
2001 return -EPERM;
2002 if (ioc->len >= HASH_TABLE_LEN)
2003 return -EINVAL;
2004 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2005 return -EFAULT;
2006 set_multicast_list(dev);
2007 break;
2008
2009 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2010 if (!capable(CAP_NET_ADMIN))
2011 return -EPERM;
2012 set_multicast_list(dev);
2013 break;
2014
2015 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2016 if (!capable(CAP_NET_ADMIN))
2017 return -EPERM;
2018 set_multicast_list(dev);
2019 break;
2020
2021 case DEPCA_GET_STATS: /* Get the driver statistics */
2022 ioc->len = sizeof(lp->pktStats);
2023 buf = kmalloc(ioc->len, GFP_KERNEL);
2024 if(!buf)
2025 return -ENOMEM;
2026 spin_lock_irqsave(&lp->lock, flags);
2027 memcpy(buf, &lp->pktStats, ioc->len);
2028 spin_unlock_irqrestore(&lp->lock, flags);
2029 if (copy_to_user(ioc->data, buf, ioc->len))
2030 status = -EFAULT;
2031 kfree(buf);
2032 break;
2033
2034 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2035 if (!capable(CAP_NET_ADMIN))
2036 return -EPERM;
2037 spin_lock_irqsave(&lp->lock, flags);
2038 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2039 spin_unlock_irqrestore(&lp->lock, flags);
2040 break;
2041
2042 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2043 i = 0;
2044 tmp.sval[i++] = inw(DEPCA_NICSR);
2045 outw(CSR0, DEPCA_ADDR); /* status register */
2046 tmp.sval[i++] = inw(DEPCA_DATA);
2047 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2048 ioc->len = i + sizeof(struct depca_init);
2049 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2050 return -EFAULT;
2051 break;
2052
2053 default:
2054 return -EOPNOTSUPP;
2055 }
2056
2057 return status;
2058 }
2059
2060 static int __init depca_module_init (void)
2061 {
2062 int err = 0;
2063
2064 #ifdef CONFIG_MCA
2065 err = mca_register_driver (&depca_mca_driver);
2066 #endif
2067 #ifdef CONFIG_EISA
2068 err |= eisa_driver_register (&depca_eisa_driver);
2069 #endif
2070 err |= platform_driver_register (&depca_isa_driver);
2071 depca_platform_probe ();
2072
2073 return err;
2074 }
2075
2076 static void __exit depca_module_exit (void)
2077 {
2078 int i;
2079 #ifdef CONFIG_MCA
2080 mca_unregister_driver (&depca_mca_driver);
2081 #endif
2082 #ifdef CONFIG_EISA
2083 eisa_driver_unregister (&depca_eisa_driver);
2084 #endif
2085 platform_driver_unregister (&depca_isa_driver);
2086
2087 for (i = 0; depca_io_ports[i].iobase; i++) {
2088 if (depca_io_ports[i].device) {
2089 depca_io_ports[i].device->dev.platform_data = NULL;
2090 platform_device_unregister (depca_io_ports[i].device);
2091 depca_io_ports[i].device = NULL;
2092 }
2093 }
2094 }
2095
2096 module_init (depca_module_init);
2097 module_exit (depca_module_exit);
A cbs scheduler for rt-kernel