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