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[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / drivers / net / depca.c
blobc4aa5fe2840e721199d1eac7e1bd32978415d480
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/config.h>
239 #include <linux/module.h>
240 #include <linux/kernel.h>
241 #include <linux/string.h>
242 #include <linux/errno.h>
243 #include <linux/ioport.h>
244 #include <linux/slab.h>
245 #include <linux/interrupt.h>
246 #include <linux/delay.h>
247 #include <linux/init.h>
248 #include <linux/crc32.h>
249 #include <linux/netdevice.h>
250 #include <linux/etherdevice.h>
251 #include <linux/skbuff.h>
252 #include <linux/time.h>
253 #include <linux/types.h>
254 #include <linux/unistd.h>
255 #include <linux/ctype.h>
256 #include <linux/moduleparam.h>
257 #include <linux/device.h>
258 #include <linux/bitops.h>
259
260 #include <asm/uaccess.h>
261 #include <asm/io.h>
262 #include <asm/dma.h>
263
264 #ifdef CONFIG_MCA
265 #include <linux/mca.h>
266 #endif
267
268 #ifdef CONFIG_EISA
269 #include <linux/eisa.h>
270 #endif
271
272 #include "depca.h"
273
274 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
275
276 #ifdef DEPCA_DEBUG
277 static int depca_debug = DEPCA_DEBUG;
278 #else
279 static int depca_debug = 1;
280 #endif
281
282 #define DEPCA_NDA 0xffe0 /* No Device Address */
283
284 #define TX_TIMEOUT (1*HZ)
285
286 /*
287 ** Ethernet PROM defines
288 */
289 #define PROBE_LENGTH 32
290 #define ETH_PROM_SIG 0xAA5500FFUL
291
292 /*
293 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
294 ** here is <= to the amount of shared memory set up by the board switches.
295 ** The number of descriptors MUST BE A POWER OF 2.
296 **
297 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
298 */
299 #define NUM_RX_DESC 8 /* Number of RX descriptors */
300 #define NUM_TX_DESC 8 /* Number of TX descriptors */
301 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
302 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
303
304 /*
305 ** EISA bus defines
306 */
307 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
308
309 /*
310 ** ISA Bus defines
311 */
312 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
313 #define DEPCA_TOTAL_SIZE 0x10
314
315 static struct {
316 u_long iobase;
317 struct platform_device *device;
318 } depca_io_ports[] = {
319 { 0x300, NULL },
320 { 0x200, NULL },
321 { 0 , NULL },
322 };
323
324 /*
325 ** Name <-> Adapter mapping
326 */
327 #define DEPCA_SIGNATURE {"DEPCA",\
328 "DE100","DE101",\
329 "DE200","DE201","DE202",\
330 "DE210","DE212",\
331 "DE422",\
332 ""}
333
334 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
335
336 enum depca_type {
337 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
338 };
339
340 static char depca_string[] = "depca";
341
342 static int depca_device_remove (struct device *device);
343
344 #ifdef CONFIG_EISA
345 static struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
347 { "" }
348 };
349 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
350
351 static int depca_eisa_probe (struct device *device);
352
353 static struct eisa_driver depca_eisa_driver = {
354 .id_table = depca_eisa_ids,
355 .driver = {
356 .name = depca_string,
357 .probe = depca_eisa_probe,
358 .remove = __devexit_p (depca_device_remove)
359 }
360 };
361 #endif
362
363 #ifdef CONFIG_MCA
364 /*
365 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
366 */
367 #define DE210_ID 0x628d
368 #define DE212_ID 0x6def
369
370 static short depca_mca_adapter_ids[] = {
371 DE210_ID,
372 DE212_ID,
373 0x0000
374 };
375
376 static char *depca_mca_adapter_name[] = {
377 "DEC EtherWORKS MC Adapter (DE210)",
378 "DEC EtherWORKS MC Adapter (DE212)",
379 NULL
380 };
381
382 static enum depca_type depca_mca_adapter_type[] = {
383 de210,
384 de212,
385 0
386 };
387
388 static int depca_mca_probe (struct device *);
389
390 static struct mca_driver depca_mca_driver = {
391 .id_table = depca_mca_adapter_ids,
392 .driver = {
393 .name = depca_string,
394 .bus = &mca_bus_type,
395 .probe = depca_mca_probe,
396 .remove = __devexit_p(depca_device_remove),
397 },
398 };
399 #endif
400
401 static int depca_isa_probe (struct device *);
402
403 static struct device_driver depca_isa_driver = {
404 .name = depca_string,
405 .bus = &platform_bus_type,
406 .probe = depca_isa_probe,
407 .remove = __devexit_p(depca_device_remove),
408 };
409
410 /*
411 ** Miscellaneous info...
412 */
413 #define DEPCA_STRLEN 16
414
415 /*
416 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
417 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
418 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
419 ** and hence the RX descriptor ring's first entry.
420 */
421 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
422 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
423 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
424
425 /*
426 ** The DEPCA Rx and Tx ring descriptors.
427 */
428 struct depca_rx_desc {
429 volatile s32 base;
430 s16 buf_length; /* This length is negative 2's complement! */
431 s16 msg_length; /* This length is "normal". */
432 };
433
434 struct depca_tx_desc {
435 volatile s32 base;
436 s16 length; /* This length is negative 2's complement! */
437 s16 misc; /* Errors and TDR info */
438 };
439
440 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
441 to LANCE memory address space */
442
443 /*
444 ** The Lance initialization block, described in databook, in common memory.
445 */
446 struct depca_init {
447 u16 mode; /* Mode register */
448 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
449 u8 mcast_table[8]; /* Multicast Hash Table. */
450 u32 rx_ring; /* Rx ring base pointer & ring length */
451 u32 tx_ring; /* Tx ring base pointer & ring length */
452 };
453
454 #define DEPCA_PKT_STAT_SZ 16
455 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
456 increase DEPCA_PKT_STAT_SZ */
457 struct depca_private {
458 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
459 enum depca_type adapter; /* Adapter type */
460 enum {
461 DEPCA_BUS_MCA = 1,
462 DEPCA_BUS_ISA,
463 DEPCA_BUS_EISA,
464 } depca_bus; /* type of bus */
465 struct depca_init init_block; /* Shadow Initialization block */
466 /* CPU address space fields */
467 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
468 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
469 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
470 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
471 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
472 u_long mem_start; /* Bus address of device RAM (before remap) */
473 u_long mem_len; /* device memory size */
474 /* Device address space fields */
475 u_long device_ram_start; /* Start of RAM in device addr space */
476 /* Offsets used in both address spaces */
477 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
478 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
479 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
480 /* Kernel-only (not device) fields */
481 int rx_new, tx_new; /* The next free ring entry */
482 int rx_old, tx_old; /* The ring entries to be free()ed. */
483 struct net_device_stats stats;
484 spinlock_t lock;
485 struct { /* Private stats counters */
486 u32 bins[DEPCA_PKT_STAT_SZ];
487 u32 unicast;
488 u32 multicast;
489 u32 broadcast;
490 u32 excessive_collisions;
491 u32 tx_underruns;
492 u32 excessive_underruns;
493 } pktStats;
494 int txRingMask; /* TX ring mask */
495 int rxRingMask; /* RX ring mask */
496 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
497 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
498 };
499
500 /*
501 ** The transmit ring full condition is described by the tx_old and tx_new
502 ** pointers by:
503 ** tx_old = tx_new Empty ring
504 ** tx_old = tx_new+1 Full ring
505 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
506 */
507 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
508 lp->tx_old+lp->txRingMask-lp->tx_new:\
509 lp->tx_old -lp->tx_new-1)
510
511 /*
512 ** Public Functions
513 */
514 static int depca_open(struct net_device *dev);
515 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
516 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs);
517 static int depca_close(struct net_device *dev);
518 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
519 static void depca_tx_timeout(struct net_device *dev);
520 static struct net_device_stats *depca_get_stats(struct net_device *dev);
521 static void set_multicast_list(struct net_device *dev);
522
523 /*
524 ** Private functions
525 */
526 static void depca_init_ring(struct net_device *dev);
527 static int depca_rx(struct net_device *dev);
528 static int depca_tx(struct net_device *dev);
529
530 static void LoadCSRs(struct net_device *dev);
531 static int InitRestartDepca(struct net_device *dev);
532 static int DepcaSignature(char *name, u_long paddr);
533 static int DevicePresent(u_long ioaddr);
534 static int get_hw_addr(struct net_device *dev);
535 static void SetMulticastFilter(struct net_device *dev);
536 static int load_packet(struct net_device *dev, struct sk_buff *skb);
537 static void depca_dbg_open(struct net_device *dev);
538
539 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
540 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
541 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
542 static u_char *depca_irq;
543
544 static int irq;
545 static int io;
546 static char *adapter_name;
547 static int mem; /* For loadable module assignment
548 use insmod mem=0x????? .... */
549 module_param (irq, int, 0);
550 module_param (io, int, 0);
551 module_param (adapter_name, charp, 0);
552 module_param (mem, int, 0);
553 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
554 MODULE_PARM_DESC(io, "DEPCA I/O base address");
555 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
556 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
557 MODULE_LICENSE("GPL");
558
559 /*
560 ** Miscellaneous defines...
561 */
562 #define STOP_DEPCA \
563 outw(CSR0, DEPCA_ADDR);\
564 outw(STOP, DEPCA_DATA)
565
566 static int __init depca_hw_init (struct net_device *dev, struct device *device)
567 {
568 struct depca_private *lp;
569 int i, j, offset, netRAM, mem_len, status = 0;
570 s16 nicsr;
571 u_long ioaddr;
572 u_long mem_start;
573
574 /*
575 * We are now supposed to enter this function with the
576 * following fields filled with proper values :
577 *
578 * dev->base_addr
579 * lp->mem_start
580 * lp->depca_bus
581 * lp->adapter
582 *
583 * dev->irq can be set if known from device configuration (on
584 * MCA or EISA) or module option. Otherwise, it will be auto
585 * detected.
586 */
587
588 ioaddr = dev->base_addr;
589
590 STOP_DEPCA;
591
592 nicsr = inb(DEPCA_NICSR);
593 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
594 outb(nicsr, DEPCA_NICSR);
595
596 if (inw(DEPCA_DATA) != STOP) {
597 return -ENXIO;
598 }
599
600 lp = (struct depca_private *) dev->priv;
601 mem_start = lp->mem_start;
602
603 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
604 return -ENXIO;
605
606 printk ("%s: %s at 0x%04lx",
607 device->bus_id, depca_signature[lp->adapter], ioaddr);
608
609 switch (lp->depca_bus) {
610 #ifdef CONFIG_MCA
611 case DEPCA_BUS_MCA:
612 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
613 break;
614 #endif
615
616 #ifdef CONFIG_EISA
617 case DEPCA_BUS_EISA:
618 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
619 break;
620 #endif
621
622 case DEPCA_BUS_ISA:
623 break;
624
625 default:
626 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
627 return -ENXIO;
628 }
629
630 printk(", h/w address ");
631 status = get_hw_addr(dev);
632 if (status != 0) {
633 printk(" which has an Ethernet PROM CRC error.\n");
634 return -ENXIO;
635 }
636 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
637 printk("%2.2x:", dev->dev_addr[i]);
638 }
639 printk("%2.2x", dev->dev_addr[i]);
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->get_stats = &depca_get_stats;
800 dev->set_multicast_list = &set_multicast_list;
801 dev->do_ioctl = &depca_ioctl;
802 dev->tx_timeout = depca_tx_timeout;
803 dev->watchdog_timeo = TX_TIMEOUT;
804
805 dev->mem_start = 0;
806
807 device->driver_data = dev;
808 SET_NETDEV_DEV (dev, device);
809
810 status = register_netdev(dev);
811 if (status == 0)
812 return 0;
813 out2:
814 iounmap(lp->sh_mem);
815 out1:
816 release_mem_region (mem_start, mem_len);
817 out_priv:
818 return status;
819 }
820 \f
821
822 static int depca_open(struct net_device *dev)
823 {
824 struct depca_private *lp = (struct depca_private *) dev->priv;
825 u_long ioaddr = dev->base_addr;
826 s16 nicsr;
827 int status = 0;
828
829 STOP_DEPCA;
830 nicsr = inb(DEPCA_NICSR);
831
832 /* Make sure the shadow RAM is enabled */
833 if (lp->adapter != DEPCA) {
834 nicsr |= SHE;
835 outb(nicsr, DEPCA_NICSR);
836 }
837
838 /* Re-initialize the DEPCA... */
839 depca_init_ring(dev);
840 LoadCSRs(dev);
841
842 depca_dbg_open(dev);
843
844 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
845 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
846 status = -EAGAIN;
847 } else {
848
849 /* Enable DEPCA board interrupts and turn off LED */
850 nicsr = ((nicsr & ~IM & ~LED) | IEN);
851 outb(nicsr, DEPCA_NICSR);
852 outw(CSR0, DEPCA_ADDR);
853
854 netif_start_queue(dev);
855
856 status = InitRestartDepca(dev);
857
858 if (depca_debug > 1) {
859 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
860 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
861 }
862 }
863 return status;
864 }
865
866 /* Initialize the lance Rx and Tx descriptor rings. */
867 static void depca_init_ring(struct net_device *dev)
868 {
869 struct depca_private *lp = (struct depca_private *) dev->priv;
870 u_int i;
871 u_long offset;
872
873 /* Lock out other processes whilst setting up the hardware */
874 netif_stop_queue(dev);
875
876 lp->rx_new = lp->tx_new = 0;
877 lp->rx_old = lp->tx_old = 0;
878
879 /* Initialize the base address and length of each buffer in the ring */
880 for (i = 0; i <= lp->rxRingMask; i++) {
881 offset = lp->buffs_offset + i * RX_BUFF_SZ;
882 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
883 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
884 lp->rx_buff[i] = lp->sh_mem + offset;
885 }
886
887 for (i = 0; i <= lp->txRingMask; i++) {
888 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
889 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
890 lp->tx_buff[i] = lp->sh_mem + offset;
891 }
892
893 /* Set up the initialization block */
894 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
895 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
896
897 SetMulticastFilter(dev);
898
899 for (i = 0; i < ETH_ALEN; i++) {
900 lp->init_block.phys_addr[i] = dev->dev_addr[i];
901 }
902
903 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
904 }
905
906
907 static void depca_tx_timeout(struct net_device *dev)
908 {
909 u_long ioaddr = dev->base_addr;
910
911 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
912
913 STOP_DEPCA;
914 depca_init_ring(dev);
915 LoadCSRs(dev);
916 dev->trans_start = jiffies;
917 netif_wake_queue(dev);
918 InitRestartDepca(dev);
919 }
920
921
922 /*
923 ** Writes a socket buffer to TX descriptor ring and starts transmission
924 */
925 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
926 {
927 struct depca_private *lp = (struct depca_private *) dev->priv;
928 u_long ioaddr = dev->base_addr;
929 int status = 0;
930
931 /* Transmitter timeout, serious problems. */
932 if (skb->len < 1)
933 goto out;
934
935 if (skb->len < ETH_ZLEN) {
936 skb = skb_padto(skb, ETH_ZLEN);
937 if (skb == NULL)
938 goto out;
939 }
940
941 netif_stop_queue(dev);
942
943 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
944 status = load_packet(dev, skb);
945
946 if (!status) {
947 /* Trigger an immediate send demand. */
948 outw(CSR0, DEPCA_ADDR);
949 outw(INEA | TDMD, DEPCA_DATA);
950
951 dev->trans_start = jiffies;
952 dev_kfree_skb(skb);
953 }
954 if (TX_BUFFS_AVAIL)
955 netif_start_queue(dev);
956 } else
957 status = -1;
958
959 out:
960 return status;
961 }
962
963 /*
964 ** The DEPCA interrupt handler.
965 */
966 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
967 {
968 struct net_device *dev = dev_id;
969 struct depca_private *lp;
970 s16 csr0, nicsr;
971 u_long ioaddr;
972
973 if (dev == NULL) {
974 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
975 return IRQ_NONE;
976 }
977
978 lp = (struct depca_private *) dev->priv;
979 ioaddr = dev->base_addr;
980
981 spin_lock(&lp->lock);
982
983 /* mask the DEPCA board interrupts and turn on the LED */
984 nicsr = inb(DEPCA_NICSR);
985 nicsr |= (IM | LED);
986 outb(nicsr, DEPCA_NICSR);
987
988 outw(CSR0, DEPCA_ADDR);
989 csr0 = inw(DEPCA_DATA);
990
991 /* Acknowledge all of the current interrupt sources ASAP. */
992 outw(csr0 & INTE, DEPCA_DATA);
993
994 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
995 depca_rx(dev);
996
997 if (csr0 & TINT) /* Tx interrupt (packet sent) */
998 depca_tx(dev);
999
1000 /* Any resources available? */
1001 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1002 netif_wake_queue(dev);
1003 }
1004
1005 /* Unmask the DEPCA board interrupts and turn off the LED */
1006 nicsr = (nicsr & ~IM & ~LED);
1007 outb(nicsr, DEPCA_NICSR);
1008
1009 spin_unlock(&lp->lock);
1010 return IRQ_HANDLED;
1011 }
1012
1013 /* Called with lp->lock held */
1014 static int depca_rx(struct net_device *dev)
1015 {
1016 struct depca_private *lp = (struct depca_private *) dev->priv;
1017 int i, entry;
1018 s32 status;
1019
1020 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1021 status = readl(&lp->rx_ring[entry].base) >> 16;
1022 if (status & R_STP) { /* Remember start of frame */
1023 lp->rx_old = entry;
1024 }
1025 if (status & R_ENP) { /* Valid frame status */
1026 if (status & R_ERR) { /* There was an error. */
1027 lp->stats.rx_errors++; /* Update the error stats. */
1028 if (status & R_FRAM)
1029 lp->stats.rx_frame_errors++;
1030 if (status & R_OFLO)
1031 lp->stats.rx_over_errors++;
1032 if (status & R_CRC)
1033 lp->stats.rx_crc_errors++;
1034 if (status & R_BUFF)
1035 lp->stats.rx_fifo_errors++;
1036 } else {
1037 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1038 struct sk_buff *skb;
1039
1040 skb = dev_alloc_skb(pkt_len + 2);
1041 if (skb != NULL) {
1042 unsigned char *buf;
1043 skb_reserve(skb, 2); /* 16 byte align the IP header */
1044 buf = skb_put(skb, pkt_len);
1045 skb->dev = dev;
1046 if (entry < lp->rx_old) { /* Wrapped buffer */
1047 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1048 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1049 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1050 } else { /* Linear buffer */
1051 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1052 }
1053
1054 /*
1055 ** Notify the upper protocol layers that there is another
1056 ** packet to handle
1057 */
1058 skb->protocol = eth_type_trans(skb, dev);
1059 netif_rx(skb);
1060
1061 /*
1062 ** Update stats
1063 */
1064 dev->last_rx = jiffies;
1065 lp->stats.rx_packets++;
1066 lp->stats.rx_bytes += pkt_len;
1067 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1068 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1069 lp->pktStats.bins[i]++;
1070 i = DEPCA_PKT_STAT_SZ;
1071 }
1072 }
1073 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1074 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1075 lp->pktStats.broadcast++;
1076 } else {
1077 lp->pktStats.multicast++;
1078 }
1079 } 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])) {
1080 lp->pktStats.unicast++;
1081 }
1082
1083 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1084 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1085 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1086 }
1087 } else {
1088 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1089 lp->stats.rx_dropped++; /* Really, deferred. */
1090 break;
1091 }
1092 }
1093 /* Change buffer ownership for this last frame, back to the adapter */
1094 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1095 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1096 }
1097 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1098 }
1099
1100 /*
1101 ** Update entry information
1102 */
1103 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1104 }
1105
1106 return 0;
1107 }
1108
1109 /*
1110 ** Buffer sent - check for buffer errors.
1111 ** Called with lp->lock held
1112 */
1113 static int depca_tx(struct net_device *dev)
1114 {
1115 struct depca_private *lp = (struct depca_private *) dev->priv;
1116 int entry;
1117 s32 status;
1118 u_long ioaddr = dev->base_addr;
1119
1120 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1121 status = readl(&lp->tx_ring[entry].base) >> 16;
1122
1123 if (status < 0) { /* Packet not yet sent! */
1124 break;
1125 } else if (status & T_ERR) { /* An error occurred. */
1126 status = readl(&lp->tx_ring[entry].misc);
1127 lp->stats.tx_errors++;
1128 if (status & TMD3_RTRY)
1129 lp->stats.tx_aborted_errors++;
1130 if (status & TMD3_LCAR)
1131 lp->stats.tx_carrier_errors++;
1132 if (status & TMD3_LCOL)
1133 lp->stats.tx_window_errors++;
1134 if (status & TMD3_UFLO)
1135 lp->stats.tx_fifo_errors++;
1136 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1137 /* Trigger an immediate send demand. */
1138 outw(CSR0, DEPCA_ADDR);
1139 outw(INEA | TDMD, DEPCA_DATA);
1140 }
1141 } else if (status & (T_MORE | T_ONE)) {
1142 lp->stats.collisions++;
1143 } else {
1144 lp->stats.tx_packets++;
1145 }
1146
1147 /* Update all the pointers */
1148 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1149 }
1150
1151 return 0;
1152 }
1153
1154 static int depca_close(struct net_device *dev)
1155 {
1156 struct depca_private *lp = (struct depca_private *) dev->priv;
1157 s16 nicsr;
1158 u_long ioaddr = dev->base_addr;
1159
1160 netif_stop_queue(dev);
1161
1162 outw(CSR0, DEPCA_ADDR);
1163
1164 if (depca_debug > 1) {
1165 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1166 }
1167
1168 /*
1169 ** We stop the DEPCA here -- it occasionally polls
1170 ** memory if we don't.
1171 */
1172 outw(STOP, DEPCA_DATA);
1173
1174 /*
1175 ** Give back the ROM in case the user wants to go to DOS
1176 */
1177 if (lp->adapter != DEPCA) {
1178 nicsr = inb(DEPCA_NICSR);
1179 nicsr &= ~SHE;
1180 outb(nicsr, DEPCA_NICSR);
1181 }
1182
1183 /*
1184 ** Free the associated irq
1185 */
1186 free_irq(dev->irq, dev);
1187 return 0;
1188 }
1189
1190 static void LoadCSRs(struct net_device *dev)
1191 {
1192 struct depca_private *lp = (struct depca_private *) dev->priv;
1193 u_long ioaddr = dev->base_addr;
1194
1195 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1196 outw((u16) lp->device_ram_start, DEPCA_DATA);
1197 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1198 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1199 outw(CSR3, DEPCA_ADDR); /* ALE control */
1200 outw(ACON, DEPCA_DATA);
1201
1202 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1203
1204 return;
1205 }
1206
1207 static int InitRestartDepca(struct net_device *dev)
1208 {
1209 struct depca_private *lp = (struct depca_private *) dev->priv;
1210 u_long ioaddr = dev->base_addr;
1211 int i, status = 0;
1212
1213 /* Copy the shadow init_block to shared memory */
1214 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1215
1216 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1217 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1218
1219 /* wait for lance to complete initialisation */
1220 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1221
1222 if (i != 100) {
1223 /* clear IDON by writing a "1", enable interrupts and start lance */
1224 outw(IDON | INEA | STRT, DEPCA_DATA);
1225 if (depca_debug > 2) {
1226 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1227 }
1228 } else {
1229 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230 status = -1;
1231 }
1232
1233 return status;
1234 }
1235
1236 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1237 {
1238 struct depca_private *lp = (struct depca_private *) dev->priv;
1239
1240 /* Null body since there is no framing error counter */
1241
1242 return &lp->stats;
1243 }
1244
1245 /*
1246 ** Set or clear the multicast filter for this adaptor.
1247 */
1248 static void set_multicast_list(struct net_device *dev)
1249 {
1250 struct depca_private *lp = (struct depca_private *) dev->priv;
1251 u_long ioaddr = dev->base_addr;
1252
1253 if (dev) {
1254 netif_stop_queue(dev);
1255 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1256
1257 STOP_DEPCA; /* Temporarily stop the depca. */
1258 depca_init_ring(dev); /* Initialize the descriptor rings */
1259
1260 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1261 lp->init_block.mode |= PROM;
1262 } else {
1263 SetMulticastFilter(dev);
1264 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1265 }
1266
1267 LoadCSRs(dev); /* Reload CSR3 */
1268 InitRestartDepca(dev); /* Resume normal operation. */
1269 netif_start_queue(dev); /* Unlock the TX ring */
1270 }
1271 }
1272
1273 /*
1274 ** Calculate the hash code and update the logical address filter
1275 ** from a list of ethernet multicast addresses.
1276 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1277 ** LANCE calculates its hash codes big endian.
1278 */
1279 static void SetMulticastFilter(struct net_device *dev)
1280 {
1281 struct depca_private *lp = (struct depca_private *) dev->priv;
1282 struct dev_mc_list *dmi = dev->mc_list;
1283 char *addrs;
1284 int i, j, bit, byte;
1285 u16 hashcode;
1286 u32 crc;
1287
1288 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1289 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1290 lp->init_block.mcast_table[i] = (char) 0xff;
1291 }
1292 } else {
1293 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1294 lp->init_block.mcast_table[i] = 0;
1295 }
1296 /* Add multicast addresses */
1297 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1298 addrs = dmi->dmi_addr;
1299 dmi = dmi->next;
1300 if ((*addrs & 0x01) == 1) { /* multicast address? */
1301 crc = ether_crc(ETH_ALEN, addrs);
1302 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1303 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1304 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1305 }
1306
1307
1308 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1309 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1310 lp->init_block.mcast_table[byte] |= bit;
1311 }
1312 }
1313 }
1314
1315 return;
1316 }
1317
1318 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1319 {
1320 int status = 0;
1321
1322 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1323 status = -EBUSY;
1324 goto out;
1325 }
1326
1327 if (DevicePresent(ioaddr)) {
1328 status = -ENODEV;
1329 goto out_release;
1330 }
1331
1332 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1333 status = -ENOMEM;
1334 goto out_release;
1335 }
1336
1337 return 0;
1338
1339 out_release:
1340 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1341 out:
1342 return status;
1343 }
1344
1345 #ifdef CONFIG_MCA
1346 /*
1347 ** Microchannel bus I/O device probe
1348 */
1349 static int __init depca_mca_probe(struct device *device)
1350 {
1351 unsigned char pos[2];
1352 unsigned char where;
1353 unsigned long iobase, mem_start;
1354 int irq, err;
1355 struct mca_device *mdev = to_mca_device (device);
1356 struct net_device *dev;
1357 struct depca_private *lp;
1358
1359 /*
1360 ** Search for the adapter. If an address has been given, search
1361 ** specifically for the card at that address. Otherwise find the
1362 ** first card in the system.
1363 */
1364
1365 pos[0] = mca_device_read_stored_pos(mdev, 2);
1366 pos[1] = mca_device_read_stored_pos(mdev, 3);
1367
1368 /*
1369 ** IO of card is handled by bits 1 and 2 of pos0.
1370 **
1371 ** bit2 bit1 IO
1372 ** 0 0 0x2c00
1373 ** 0 1 0x2c10
1374 ** 1 0 0x2c20
1375 ** 1 1 0x2c30
1376 */
1377 where = (pos[0] & 6) >> 1;
1378 iobase = 0x2c00 + (0x10 * where);
1379
1380 /*
1381 ** Found the adapter we were looking for. Now start setting it up.
1382 **
1383 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1384 ** of pos1. Bits are as follows (from the ADF file):
1385 **
1386 ** Bits
1387 ** 3 2 1 0 IRQ
1388 ** --------------------
1389 ** 0 0 1 0 5
1390 ** 0 0 0 1 9
1391 ** 0 1 0 0 10
1392 ** 1 0 0 0 11
1393 */
1394 where = pos[1] & 0x0f;
1395 switch (where) {
1396 case 1:
1397 irq = 9;
1398 break;
1399 case 2:
1400 irq = 5;
1401 break;
1402 case 4:
1403 irq = 10;
1404 break;
1405 case 8:
1406 irq = 11;
1407 break;
1408 default:
1409 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", dev->name, where);
1410 return -EINVAL;
1411 }
1412
1413 /*
1414 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1415 ** They are mapped as follows:
1416 **
1417 ** Bit
1418 ** 5 4 3 Memory Addresses
1419 ** 0 0 0 C0000-CFFFF (64K)
1420 ** 1 0 0 C8000-CFFFF (32K)
1421 ** 0 0 1 D0000-DFFFF (64K)
1422 ** 1 0 1 D8000-DFFFF (32K)
1423 ** 0 1 0 E0000-EFFFF (64K)
1424 ** 1 1 0 E8000-EFFFF (32K)
1425 */
1426 where = (pos[0] & 0x18) >> 3;
1427 mem_start = 0xc0000 + (where * 0x10000);
1428 if (pos[0] & 0x20) {
1429 mem_start += 0x8000;
1430 }
1431
1432 /* claim the slot */
1433 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1434 sizeof(mdev->name));
1435 mca_device_set_claim(mdev, 1);
1436
1437 /*
1438 ** Get everything allocated and initialized... (almost just
1439 ** like the ISA and EISA probes)
1440 */
1441 irq = mca_device_transform_irq(mdev, irq);
1442 iobase = mca_device_transform_ioport(mdev, iobase);
1443
1444 if ((err = depca_common_init (iobase, &dev)))
1445 goto out_unclaim;
1446
1447 dev->irq = irq;
1448 dev->base_addr = iobase;
1449 lp = dev->priv;
1450 lp->depca_bus = DEPCA_BUS_MCA;
1451 lp->adapter = depca_mca_adapter_type[mdev->index];
1452 lp->mem_start = mem_start;
1453
1454 if ((err = depca_hw_init(dev, device)))
1455 goto out_free;
1456
1457 return 0;
1458
1459 out_free:
1460 free_netdev (dev);
1461 release_region (iobase, DEPCA_TOTAL_SIZE);
1462 out_unclaim:
1463 mca_device_set_claim(mdev, 0);
1464
1465 return err;
1466 }
1467 #endif
1468
1469 /*
1470 ** ISA bus I/O device probe
1471 */
1472
1473 static void depca_platform_release (struct device *device)
1474 {
1475 struct platform_device *pldev;
1476
1477 /* free device */
1478 pldev = to_platform_device (device);
1479 kfree (pldev);
1480 }
1481
1482 static void __init depca_platform_probe (void)
1483 {
1484 int i;
1485 struct platform_device *pldev;
1486
1487 for (i = 0; depca_io_ports[i].iobase; i++) {
1488 depca_io_ports[i].device = NULL;
1489
1490 /* if an address has been specified on the command
1491 * line, use it (if valid) */
1492 if (io && io != depca_io_ports[i].iobase)
1493 continue;
1494
1495 if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL)))
1496 continue;
1497
1498 memset (pldev, 0, sizeof (*pldev));
1499 pldev->name = depca_string;
1500 pldev->id = i;
1501 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1502 pldev->dev.release = depca_platform_release;
1503 depca_io_ports[i].device = pldev;
1504
1505 if (platform_device_register (pldev)) {
1506 kfree (pldev);
1507 depca_io_ports[i].device = NULL;
1508 continue;
1509 }
1510
1511 if (!pldev->dev.driver) {
1512 /* The driver was not bound to this device, there was
1513 * no hardware at this address. Unregister it, as the
1514 * release fuction will take care of freeing the
1515 * allocated structure */
1516
1517 depca_io_ports[i].device = NULL;
1518 platform_device_unregister (pldev);
1519 }
1520 }
1521 }
1522
1523 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1524 {
1525 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1526 enum depca_type adapter = unknown;
1527 int i;
1528
1529 for (i = 0; mem_base[i]; i++) {
1530 *mem_start = mem ? mem : mem_base[i];
1531 adapter = DepcaSignature (adapter_name, *mem_start);
1532 if (adapter != unknown)
1533 break;
1534 }
1535
1536 return adapter;
1537 }
1538
1539 static int __init depca_isa_probe (struct device *device)
1540 {
1541 struct net_device *dev;
1542 struct depca_private *lp;
1543 u_long ioaddr, mem_start = 0;
1544 enum depca_type adapter = unknown;
1545 int status = 0;
1546
1547 ioaddr = (u_long) device->platform_data;
1548
1549 if ((status = depca_common_init (ioaddr, &dev)))
1550 goto out;
1551
1552 adapter = depca_shmem_probe (&mem_start);
1553
1554 if (adapter == unknown) {
1555 status = -ENODEV;
1556 goto out_free;
1557 }
1558
1559 dev->base_addr = ioaddr;
1560 dev->irq = irq; /* Use whatever value the user gave
1561 * us, and 0 if he didn't. */
1562 lp = dev->priv;
1563 lp->depca_bus = DEPCA_BUS_ISA;
1564 lp->adapter = adapter;
1565 lp->mem_start = mem_start;
1566
1567 if ((status = depca_hw_init(dev, device)))
1568 goto out_free;
1569
1570 return 0;
1571
1572 out_free:
1573 free_netdev (dev);
1574 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1575 out:
1576 return status;
1577 }
1578
1579 /*
1580 ** EISA callbacks from sysfs.
1581 */
1582
1583 #ifdef CONFIG_EISA
1584 static int __init depca_eisa_probe (struct device *device)
1585 {
1586 struct eisa_device *edev;
1587 struct net_device *dev;
1588 struct depca_private *lp;
1589 u_long ioaddr, mem_start;
1590 int status = 0;
1591
1592 edev = to_eisa_device (device);
1593 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1594
1595 if ((status = depca_common_init (ioaddr, &dev)))
1596 goto out;
1597
1598 /* It would have been nice to get card configuration from the
1599 * card. Unfortunately, this register is write-only (shares
1600 * it's address with the ethernet prom)... As we don't parse
1601 * the EISA configuration structures (yet... :-), just rely on
1602 * the ISA probing to sort it out... */
1603
1604 depca_shmem_probe (&mem_start);
1605
1606 dev->base_addr = ioaddr;
1607 dev->irq = irq;
1608 lp = dev->priv;
1609 lp->depca_bus = DEPCA_BUS_EISA;
1610 lp->adapter = edev->id.driver_data;
1611 lp->mem_start = mem_start;
1612
1613 if ((status = depca_hw_init(dev, device)))
1614 goto out_free;
1615
1616 return 0;
1617
1618 out_free:
1619 free_netdev (dev);
1620 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1621 out:
1622 return status;
1623 }
1624 #endif
1625
1626 static int __devexit depca_device_remove (struct device *device)
1627 {
1628 struct net_device *dev;
1629 struct depca_private *lp;
1630 int bus;
1631
1632 dev = device->driver_data;
1633 lp = dev->priv;
1634
1635 unregister_netdev (dev);
1636 iounmap (lp->sh_mem);
1637 release_mem_region (lp->mem_start, lp->mem_len);
1638 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1639 bus = lp->depca_bus;
1640 free_netdev (dev);
1641
1642 return 0;
1643 }
1644
1645 /*
1646 ** Look for a particular board name in the on-board Remote Diagnostics
1647 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1648 ** base address.
1649 */
1650 static int __init DepcaSignature(char *name, u_long base_addr)
1651 {
1652 u_int i, j, k;
1653 void __iomem *ptr;
1654 char tmpstr[16];
1655 u_long prom_addr = base_addr + 0xc000;
1656 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1657
1658 /* Can't reserve the prom region, it is already marked as
1659 * used, at least on x86. Instead, reserve a memory region a
1660 * board would certainly use. If it works, go ahead. If not,
1661 * run like hell... */
1662
1663 if (!request_mem_region (mem_addr, 16, depca_string))
1664 return unknown;
1665
1666 /* Copy the first 16 bytes of ROM */
1667
1668 ptr = ioremap(prom_addr, 16);
1669 if (ptr == NULL) {
1670 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1671 return unknown;
1672 }
1673 for (i = 0; i < 16; i++) {
1674 tmpstr[i] = readb(ptr + i);
1675 }
1676 iounmap(ptr);
1677
1678 release_mem_region (mem_addr, 16);
1679
1680 /* Check if PROM contains a valid string */
1681 for (i = 0; *depca_signature[i] != '\0'; i++) {
1682 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1683 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1684 k++;
1685 } else { /* lost signature; begin search again */
1686 k = 0;
1687 }
1688 }
1689 if (k == strlen(depca_signature[i]))
1690 break;
1691 }
1692
1693 /* Check if name string is valid, provided there's no PROM */
1694 if (name && *name && (i == unknown)) {
1695 for (i = 0; *depca_signature[i] != '\0'; i++) {
1696 if (strcmp(name, depca_signature[i]) == 0)
1697 break;
1698 }
1699 }
1700
1701 return i;
1702 }
1703
1704 /*
1705 ** Look for a special sequence in the Ethernet station address PROM that
1706 ** is common across all DEPCA products. Note that the original DEPCA needs
1707 ** its ROM address counter to be initialized and enabled. Only enable
1708 ** if the first address octet is a 0x08 - this minimises the chances of
1709 ** messing around with some other hardware, but it assumes that this DEPCA
1710 ** card initialized itself correctly.
1711 **
1712 ** Search the Ethernet address ROM for the signature. Since the ROM address
1713 ** counter can start at an arbitrary point, the search must include the entire
1714 ** probe sequence length plus the (length_of_the_signature - 1).
1715 ** Stop the search IMMEDIATELY after the signature is found so that the
1716 ** PROM address counter is correctly positioned at the start of the
1717 ** ethernet address for later read out.
1718 */
1719 static int __init DevicePresent(u_long ioaddr)
1720 {
1721 union {
1722 struct {
1723 u32 a;
1724 u32 b;
1725 } llsig;
1726 char Sig[sizeof(u32) << 1];
1727 }
1728 dev;
1729 short sigLength = 0;
1730 s8 data;
1731 s16 nicsr;
1732 int i, j, status = 0;
1733
1734 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1735 data = inb(DEPCA_PROM); /* read data */
1736
1737 if (data == 0x08) { /* Enable counter on DEPCA */
1738 nicsr = inb(DEPCA_NICSR);
1739 nicsr |= AAC;
1740 outb(nicsr, DEPCA_NICSR);
1741 }
1742
1743 dev.llsig.a = ETH_PROM_SIG;
1744 dev.llsig.b = ETH_PROM_SIG;
1745 sigLength = sizeof(u32) << 1;
1746
1747 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1748 data = inb(DEPCA_PROM);
1749 if (dev.Sig[j] == data) { /* track signature */
1750 j++;
1751 } else { /* lost signature; begin search again */
1752 if (data == dev.Sig[0]) { /* rare case.... */
1753 j = 1;
1754 } else {
1755 j = 0;
1756 }
1757 }
1758 }
1759
1760 if (j != sigLength) {
1761 status = -ENODEV; /* search failed */
1762 }
1763
1764 return status;
1765 }
1766
1767 /*
1768 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1769 ** reason: access the upper half of the PROM with x=0; access the lower half
1770 ** with x=1.
1771 */
1772 static int __init get_hw_addr(struct net_device *dev)
1773 {
1774 u_long ioaddr = dev->base_addr;
1775 struct depca_private *lp = dev->priv;
1776 int i, k, tmp, status = 0;
1777 u_short j, x, chksum;
1778
1779 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1780
1781 for (i = 0, k = 0, j = 0; j < 3; j++) {
1782 k <<= 1;
1783 if (k > 0xffff)
1784 k -= 0xffff;
1785
1786 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1787 dev->dev_addr[i++] = (u_char) tmp;
1788 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1789 dev->dev_addr[i++] = (u_char) tmp;
1790
1791 if (k > 0xffff)
1792 k -= 0xffff;
1793 }
1794 if (k == 0xffff)
1795 k = 0;
1796
1797 chksum = (u_char) inb(DEPCA_PROM + x);
1798 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1799 if (k != chksum)
1800 status = -1;
1801
1802 return status;
1803 }
1804
1805 /*
1806 ** Load a packet into the shared memory
1807 */
1808 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1809 {
1810 struct depca_private *lp = (struct depca_private *) dev->priv;
1811 int i, entry, end, len, status = 0;
1812
1813 entry = lp->tx_new; /* Ring around buffer number. */
1814 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1815 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1816 /*
1817 ** Caution: the write order is important here... don't set up the
1818 ** ownership rights until all the other information is in place.
1819 */
1820 if (end < entry) { /* wrapped buffer */
1821 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1822 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1823 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1824 } else { /* linear buffer */
1825 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1826 }
1827
1828 /* set up the buffer descriptors */
1829 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1830 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1831 /* clean out flags */
1832 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1833 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1834 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1835 len -= TX_BUFF_SZ;
1836 }
1837 /* clean out flags */
1838 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1839 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1840 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1841
1842 /* start of packet */
1843 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1844 /* end of packet */
1845 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1846
1847 for (i = end; i != entry; --i) {
1848 /* ownership of packet */
1849 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1850 if (i == 0)
1851 i = lp->txRingMask + 1;
1852 }
1853 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1854
1855 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1856 } else {
1857 status = -1;
1858 }
1859
1860 return status;
1861 }
1862
1863 static void depca_dbg_open(struct net_device *dev)
1864 {
1865 struct depca_private *lp = (struct depca_private *) dev->priv;
1866 u_long ioaddr = dev->base_addr;
1867 struct depca_init *p = &lp->init_block;
1868 int i;
1869
1870 if (depca_debug > 1) {
1871 /* Do not copy the shadow init block into shared memory */
1872 /* Debugging should not affect normal operation! */
1873 /* The shadow init block will get copied across during InitRestartDepca */
1874 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1875 printk("Descriptor head addresses (CPU):\n");
1876 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1877 printk("Descriptor addresses (CPU):\nRX: ");
1878 for (i = 0; i < lp->rxRingMask; i++) {
1879 if (i < 3) {
1880 printk("%p ", &lp->rx_ring[i].base);
1881 }
1882 }
1883 printk("...%p\n", &lp->rx_ring[i].base);
1884 printk("TX: ");
1885 for (i = 0; i < lp->txRingMask; i++) {
1886 if (i < 3) {
1887 printk("%p ", &lp->tx_ring[i].base);
1888 }
1889 }
1890 printk("...%p\n", &lp->tx_ring[i].base);
1891 printk("\nDescriptor buffers (Device):\nRX: ");
1892 for (i = 0; i < lp->rxRingMask; i++) {
1893 if (i < 3) {
1894 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1895 }
1896 }
1897 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1898 printk("TX: ");
1899 for (i = 0; i < lp->txRingMask; i++) {
1900 if (i < 3) {
1901 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1902 }
1903 }
1904 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1905 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1906 printk(" mode: 0x%4.4x\n", p->mode);
1907 printk(" physical address: ");
1908 for (i = 0; i < ETH_ALEN - 1; i++) {
1909 printk("%2.2x:", p->phys_addr[i]);
1910 }
1911 printk("%2.2x\n", p->phys_addr[i]);
1912 printk(" multicast hash table: ");
1913 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1914 printk("%2.2x:", p->mcast_table[i]);
1915 }
1916 printk("%2.2x\n", p->mcast_table[i]);
1917 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1918 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1919 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1920 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1921 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1922 outw(CSR2, DEPCA_ADDR);
1923 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1924 outw(CSR1, DEPCA_ADDR);
1925 printk("%4.4x\n", inw(DEPCA_DATA));
1926 outw(CSR3, DEPCA_ADDR);
1927 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1928 }
1929
1930 return;
1931 }
1932
1933 /*
1934 ** Perform IOCTL call functions here. Some are privileged operations and the
1935 ** effective uid is checked in those cases.
1936 ** All multicast IOCTLs will not work here and are for testing purposes only.
1937 */
1938 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1939 {
1940 struct depca_private *lp = (struct depca_private *) dev->priv;
1941 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1942 int i, status = 0;
1943 u_long ioaddr = dev->base_addr;
1944 union {
1945 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1946 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1947 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1948 } tmp;
1949 unsigned long flags;
1950 void *buf;
1951
1952 switch (ioc->cmd) {
1953 case DEPCA_GET_HWADDR: /* Get the hardware address */
1954 for (i = 0; i < ETH_ALEN; i++) {
1955 tmp.addr[i] = dev->dev_addr[i];
1956 }
1957 ioc->len = ETH_ALEN;
1958 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1959 return -EFAULT;
1960 break;
1961
1962 case DEPCA_SET_HWADDR: /* Set the hardware address */
1963 if (!capable(CAP_NET_ADMIN))
1964 return -EPERM;
1965 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1966 return -EFAULT;
1967 for (i = 0; i < ETH_ALEN; i++) {
1968 dev->dev_addr[i] = tmp.addr[i];
1969 }
1970 netif_stop_queue(dev);
1971 while (lp->tx_old != lp->tx_new)
1972 cpu_relax(); /* Wait for the ring to empty */
1973
1974 STOP_DEPCA; /* Temporarily stop the depca. */
1975 depca_init_ring(dev); /* Initialize the descriptor rings */
1976 LoadCSRs(dev); /* Reload CSR3 */
1977 InitRestartDepca(dev); /* Resume normal operation. */
1978 netif_start_queue(dev); /* Unlock the TX ring */
1979 break;
1980
1981 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1982 if (!capable(CAP_NET_ADMIN))
1983 return -EPERM;
1984 netif_stop_queue(dev);
1985 while (lp->tx_old != lp->tx_new)
1986 cpu_relax(); /* Wait for the ring to empty */
1987
1988 STOP_DEPCA; /* Temporarily stop the depca. */
1989 depca_init_ring(dev); /* Initialize the descriptor rings */
1990 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1991
1992 LoadCSRs(dev); /* Reload CSR3 */
1993 InitRestartDepca(dev); /* Resume normal operation. */
1994 netif_start_queue(dev); /* Unlock the TX ring */
1995 break;
1996
1997 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1998 if (!capable(CAP_NET_ADMIN))
1999 return -EPERM;
2000 netif_stop_queue(dev);
2001 while (lp->tx_old != lp->tx_new)
2002 cpu_relax(); /* Wait for the ring to empty */
2003
2004 STOP_DEPCA; /* Temporarily stop the depca. */
2005 depca_init_ring(dev); /* Initialize the descriptor rings */
2006 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
2007
2008 LoadCSRs(dev); /* Reload CSR3 */
2009 InitRestartDepca(dev); /* Resume normal operation. */
2010 netif_start_queue(dev); /* Unlock the TX ring */
2011 break;
2012
2013 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2014 if(!capable(CAP_NET_ADMIN))
2015 return -EPERM;
2016 printk("%s: Boo!\n", dev->name);
2017 break;
2018
2019 case DEPCA_GET_MCA: /* Get the multicast address table */
2020 ioc->len = (HASH_TABLE_LEN >> 3);
2021 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2022 return -EFAULT;
2023 break;
2024
2025 case DEPCA_SET_MCA: /* Set a multicast address */
2026 if (!capable(CAP_NET_ADMIN))
2027 return -EPERM;
2028 if (ioc->len >= HASH_TABLE_LEN)
2029 return -EINVAL;
2030 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2031 return -EFAULT;
2032 set_multicast_list(dev);
2033 break;
2034
2035 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2036 if (!capable(CAP_NET_ADMIN))
2037 return -EPERM;
2038 set_multicast_list(dev);
2039 break;
2040
2041 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2042 if (!capable(CAP_NET_ADMIN))
2043 return -EPERM;
2044 set_multicast_list(dev);
2045 break;
2046
2047 case DEPCA_GET_STATS: /* Get the driver statistics */
2048 ioc->len = sizeof(lp->pktStats);
2049 buf = kmalloc(ioc->len, GFP_KERNEL);
2050 if(!buf)
2051 return -ENOMEM;
2052 spin_lock_irqsave(&lp->lock, flags);
2053 memcpy(buf, &lp->pktStats, ioc->len);
2054 spin_unlock_irqrestore(&lp->lock, flags);
2055 if (copy_to_user(ioc->data, buf, ioc->len))
2056 status = -EFAULT;
2057 kfree(buf);
2058 break;
2059
2060 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2061 if (!capable(CAP_NET_ADMIN))
2062 return -EPERM;
2063 spin_lock_irqsave(&lp->lock, flags);
2064 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2065 spin_unlock_irqrestore(&lp->lock, flags);
2066 break;
2067
2068 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2069 i = 0;
2070 tmp.sval[i++] = inw(DEPCA_NICSR);
2071 outw(CSR0, DEPCA_ADDR); /* status register */
2072 tmp.sval[i++] = inw(DEPCA_DATA);
2073 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2074 ioc->len = i + sizeof(struct depca_init);
2075 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2076 return -EFAULT;
2077 break;
2078
2079 default:
2080 return -EOPNOTSUPP;
2081 }
2082
2083 return status;
2084 }
2085
2086 static int __init depca_module_init (void)
2087 {
2088 int err = 0;
2089
2090 #ifdef CONFIG_MCA
2091 err = mca_register_driver (&depca_mca_driver);
2092 #endif
2093 #ifdef CONFIG_EISA
2094 err |= eisa_driver_register (&depca_eisa_driver);
2095 #endif
2096 err |= driver_register (&depca_isa_driver);
2097 depca_platform_probe ();
2098
2099 return err;
2100 }
2101
2102 static void __exit depca_module_exit (void)
2103 {
2104 int i;
2105 #ifdef CONFIG_MCA
2106 mca_unregister_driver (&depca_mca_driver);
2107 #endif
2108 #ifdef CONFIG_EISA
2109 eisa_driver_unregister (&depca_eisa_driver);
2110 #endif
2111 driver_unregister (&depca_isa_driver);
2112
2113 for (i = 0; depca_io_ports[i].iobase; i++) {
2114 if (depca_io_ports[i].device) {
2115 platform_device_unregister (depca_io_ports[i].device);
2116 depca_io_ports[i].device = NULL;
2117 }
2118 }
2119 }
2120
2121 module_init (depca_module_init);
2122 module_exit (depca_module_exit);
Linux with added FPC-III support