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viafb: remove duplicated CX700 register init
[linux-2.6/linux-2.6-openrd.git] / drivers / net / depca.c
blob9686c1fa28f13b07a105e29f5607cb9b8ae68969
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 netdev_tx_t depca_start_xmit(struct sk_buff *skb,
520 struct net_device *dev);
521 static irqreturn_t depca_interrupt(int irq, void *dev_id);
522 static int depca_close(struct net_device *dev);
523 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524 static void depca_tx_timeout(struct net_device *dev);
525 static void set_multicast_list(struct net_device *dev);
526
527 /*
528 ** Private functions
529 */
530 static void depca_init_ring(struct net_device *dev);
531 static int depca_rx(struct net_device *dev);
532 static int depca_tx(struct net_device *dev);
533
534 static void LoadCSRs(struct net_device *dev);
535 static int InitRestartDepca(struct net_device *dev);
536 static int DepcaSignature(char *name, u_long paddr);
537 static int DevicePresent(u_long ioaddr);
538 static int get_hw_addr(struct net_device *dev);
539 static void SetMulticastFilter(struct net_device *dev);
540 static int load_packet(struct net_device *dev, struct sk_buff *skb);
541 static void depca_dbg_open(struct net_device *dev);
542
543 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
544 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
545 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
546 static u_char *depca_irq;
547
548 static int irq;
549 static int io;
550 static char *adapter_name;
551 static int mem; /* For loadable module assignment
552 use insmod mem=0x????? .... */
553 module_param (irq, int, 0);
554 module_param (io, int, 0);
555 module_param (adapter_name, charp, 0);
556 module_param (mem, int, 0);
557 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
558 MODULE_PARM_DESC(io, "DEPCA I/O base address");
559 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
560 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
561 MODULE_LICENSE("GPL");
562
563 /*
564 ** Miscellaneous defines...
565 */
566 #define STOP_DEPCA \
567 outw(CSR0, DEPCA_ADDR);\
568 outw(STOP, DEPCA_DATA)
569
570 static const struct net_device_ops depca_netdev_ops = {
571 .ndo_open = depca_open,
572 .ndo_start_xmit = depca_start_xmit,
573 .ndo_stop = depca_close,
574 .ndo_set_multicast_list = set_multicast_list,
575 .ndo_do_ioctl = depca_ioctl,
576 .ndo_tx_timeout = depca_tx_timeout,
577 .ndo_change_mtu = eth_change_mtu,
578 .ndo_set_mac_address = eth_mac_addr,
579 .ndo_validate_addr = eth_validate_addr,
580 };
581
582 static int __init depca_hw_init (struct net_device *dev, struct device *device)
583 {
584 struct depca_private *lp;
585 int i, j, offset, netRAM, mem_len, status = 0;
586 s16 nicsr;
587 u_long ioaddr;
588 u_long mem_start;
589
590 /*
591 * We are now supposed to enter this function with the
592 * following fields filled with proper values :
593 *
594 * dev->base_addr
595 * lp->mem_start
596 * lp->depca_bus
597 * lp->adapter
598 *
599 * dev->irq can be set if known from device configuration (on
600 * MCA or EISA) or module option. Otherwise, it will be auto
601 * detected.
602 */
603
604 ioaddr = dev->base_addr;
605
606 STOP_DEPCA;
607
608 nicsr = inb(DEPCA_NICSR);
609 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
610 outb(nicsr, DEPCA_NICSR);
611
612 if (inw(DEPCA_DATA) != STOP) {
613 return -ENXIO;
614 }
615
616 lp = netdev_priv(dev);
617 mem_start = lp->mem_start;
618
619 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
620 return -ENXIO;
621
622 printk("%s: %s at 0x%04lx",
623 dev_name(device), depca_signature[lp->adapter], ioaddr);
624
625 switch (lp->depca_bus) {
626 #ifdef CONFIG_MCA
627 case DEPCA_BUS_MCA:
628 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
629 break;
630 #endif
631
632 #ifdef CONFIG_EISA
633 case DEPCA_BUS_EISA:
634 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
635 break;
636 #endif
637
638 case DEPCA_BUS_ISA:
639 break;
640
641 default:
642 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
643 return -ENXIO;
644 }
645
646 printk(", h/w address ");
647 status = get_hw_addr(dev);
648 printk("%pM", dev->dev_addr);
649 if (status != 0) {
650 printk(" which has an Ethernet PROM CRC error.\n");
651 return -ENXIO;
652 }
653
654 /* Set up the maximum amount of network RAM(kB) */
655 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
656 if ((nicsr & _128KB) && (lp->adapter == de422))
657 netRAM = 128;
658
659 /* Shared Memory Base Address */
660 if (nicsr & BUF) {
661 nicsr &= ~BS; /* DEPCA RAM in top 32k */
662 netRAM -= 32;
663
664 /* Only EISA/ISA needs start address to be re-computed */
665 if (lp->depca_bus != DEPCA_BUS_MCA)
666 mem_start += 0x8000;
667 }
668
669 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)))
670 > (netRAM << 10)) {
671 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
672 return -ENXIO;
673 }
674
675 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
676
677 /* Enable the shadow RAM. */
678 if (lp->adapter != DEPCA) {
679 nicsr |= SHE;
680 outb(nicsr, DEPCA_NICSR);
681 }
682
683 spin_lock_init(&lp->lock);
684 sprintf(lp->adapter_name, "%s (%s)",
685 depca_signature[lp->adapter], dev_name(device));
686 status = -EBUSY;
687
688 /* Initialisation Block */
689 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
690 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
691 goto out_priv;
692 }
693
694 status = -EIO;
695 lp->sh_mem = ioremap(mem_start, mem_len);
696 if (lp->sh_mem == NULL) {
697 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
698 goto out1;
699 }
700
701 lp->mem_start = mem_start;
702 lp->mem_len = mem_len;
703 lp->device_ram_start = mem_start & LA_MASK;
704
705 offset = 0;
706 offset += sizeof(struct depca_init);
707
708 /* Tx & Rx descriptors (aligned to a quadword boundary) */
709 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
710 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
711 lp->rx_ring_offset = offset;
712
713 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
714 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
715 lp->tx_ring_offset = offset;
716
717 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
718
719 lp->buffs_offset = offset;
720
721 /* Finish initialising the ring information. */
722 lp->rxRingMask = NUM_RX_DESC - 1;
723 lp->txRingMask = NUM_TX_DESC - 1;
724
725 /* Calculate Tx/Rx RLEN size for the descriptors. */
726 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
727 j >>= 1;
728 }
729 lp->rx_rlen = (s32) (i << 29);
730 for (i = 0, j = lp->txRingMask; j > 0; i++) {
731 j >>= 1;
732 }
733 lp->tx_rlen = (s32) (i << 29);
734
735 /* Load the initialisation block */
736 depca_init_ring(dev);
737
738 /* Initialise the control and status registers */
739 LoadCSRs(dev);
740
741 /* Enable DEPCA board interrupts for autoprobing */
742 nicsr = ((nicsr & ~IM) | IEN);
743 outb(nicsr, DEPCA_NICSR);
744
745 /* To auto-IRQ we enable the initialization-done and DMA err,
746 interrupts. For now we will always get a DMA error. */
747 if (dev->irq < 2) {
748 unsigned char irqnum;
749 unsigned long irq_mask, delay;
750
751 irq_mask = probe_irq_on();
752
753 /* Assign the correct irq list */
754 switch (lp->adapter) {
755 case DEPCA:
756 case de100:
757 case de101:
758 depca_irq = de1xx_irq;
759 break;
760 case de200:
761 case de201:
762 case de202:
763 case de210:
764 case de212:
765 depca_irq = de2xx_irq;
766 break;
767 case de422:
768 depca_irq = de422_irq;
769 break;
770
771 default:
772 break; /* Not reached */
773 }
774
775 /* Trigger an initialization just for the interrupt. */
776 outw(INEA | INIT, DEPCA_DATA);
777
778 delay = jiffies + HZ/50;
779 while (time_before(jiffies, delay))
780 yield();
781
782 irqnum = probe_irq_off(irq_mask);
783
784 status = -ENXIO;
785 if (!irqnum) {
786 printk(" and failed to detect IRQ line.\n");
787 goto out2;
788 } else {
789 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
790 if (irqnum == depca_irq[i]) {
791 dev->irq = irqnum;
792 printk(" and uses IRQ%d.\n", dev->irq);
793 }
794
795 if (!dev->irq) {
796 printk(" but incorrect IRQ line detected.\n");
797 goto out2;
798 }
799 }
800 } else {
801 printk(" and assigned IRQ%d.\n", dev->irq);
802 }
803
804 if (depca_debug > 1) {
805 printk(version);
806 }
807
808 /* The DEPCA-specific entries in the device structure. */
809 dev->netdev_ops = &depca_netdev_ops;
810 dev->watchdog_timeo = TX_TIMEOUT;
811
812 dev->mem_start = 0;
813
814 dev_set_drvdata(device, dev);
815 SET_NETDEV_DEV (dev, device);
816
817 status = register_netdev(dev);
818 if (status == 0)
819 return 0;
820 out2:
821 iounmap(lp->sh_mem);
822 out1:
823 release_mem_region (mem_start, mem_len);
824 out_priv:
825 return status;
826 }
827
828
829 static int depca_open(struct net_device *dev)
830 {
831 struct depca_private *lp = netdev_priv(dev);
832 u_long ioaddr = dev->base_addr;
833 s16 nicsr;
834 int status = 0;
835
836 STOP_DEPCA;
837 nicsr = inb(DEPCA_NICSR);
838
839 /* Make sure the shadow RAM is enabled */
840 if (lp->adapter != DEPCA) {
841 nicsr |= SHE;
842 outb(nicsr, DEPCA_NICSR);
843 }
844
845 /* Re-initialize the DEPCA... */
846 depca_init_ring(dev);
847 LoadCSRs(dev);
848
849 depca_dbg_open(dev);
850
851 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
852 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
853 status = -EAGAIN;
854 } else {
855
856 /* Enable DEPCA board interrupts and turn off LED */
857 nicsr = ((nicsr & ~IM & ~LED) | IEN);
858 outb(nicsr, DEPCA_NICSR);
859 outw(CSR0, DEPCA_ADDR);
860
861 netif_start_queue(dev);
862
863 status = InitRestartDepca(dev);
864
865 if (depca_debug > 1) {
866 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
867 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
868 }
869 }
870 return status;
871 }
872
873 /* Initialize the lance Rx and Tx descriptor rings. */
874 static void depca_init_ring(struct net_device *dev)
875 {
876 struct depca_private *lp = netdev_priv(dev);
877 u_int i;
878 u_long offset;
879
880 /* Lock out other processes whilst setting up the hardware */
881 netif_stop_queue(dev);
882
883 lp->rx_new = lp->tx_new = 0;
884 lp->rx_old = lp->tx_old = 0;
885
886 /* Initialize the base address and length of each buffer in the ring */
887 for (i = 0; i <= lp->rxRingMask; i++) {
888 offset = lp->buffs_offset + i * RX_BUFF_SZ;
889 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
890 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
891 lp->rx_buff[i] = lp->sh_mem + offset;
892 }
893
894 for (i = 0; i <= lp->txRingMask; i++) {
895 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
896 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
897 lp->tx_buff[i] = lp->sh_mem + offset;
898 }
899
900 /* Set up the initialization block */
901 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
902 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
903
904 SetMulticastFilter(dev);
905
906 for (i = 0; i < ETH_ALEN; i++) {
907 lp->init_block.phys_addr[i] = dev->dev_addr[i];
908 }
909
910 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
911 }
912
913
914 static void depca_tx_timeout(struct net_device *dev)
915 {
916 u_long ioaddr = dev->base_addr;
917
918 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
919
920 STOP_DEPCA;
921 depca_init_ring(dev);
922 LoadCSRs(dev);
923 dev->trans_start = jiffies;
924 netif_wake_queue(dev);
925 InitRestartDepca(dev);
926 }
927
928
929 /*
930 ** Writes a socket buffer to TX descriptor ring and starts transmission
931 */
932 static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
933 struct net_device *dev)
934 {
935 struct depca_private *lp = netdev_priv(dev);
936 u_long ioaddr = dev->base_addr;
937 int status = 0;
938
939 /* Transmitter timeout, serious problems. */
940 if (skb->len < 1)
941 goto out;
942
943 if (skb_padto(skb, ETH_ZLEN))
944 goto out;
945
946 netif_stop_queue(dev);
947
948 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
949 status = load_packet(dev, skb);
950
951 if (!status) {
952 /* Trigger an immediate send demand. */
953 outw(CSR0, DEPCA_ADDR);
954 outw(INEA | TDMD, DEPCA_DATA);
955
956 dev->trans_start = jiffies;
957 dev_kfree_skb(skb);
958 }
959 if (TX_BUFFS_AVAIL)
960 netif_start_queue(dev);
961 } else
962 status = NETDEV_TX_LOCKED;
963
964 out:
965 return status;
966 }
967
968 /*
969 ** The DEPCA interrupt handler.
970 */
971 static irqreturn_t depca_interrupt(int irq, void *dev_id)
972 {
973 struct net_device *dev = dev_id;
974 struct depca_private *lp;
975 s16 csr0, nicsr;
976 u_long ioaddr;
977
978 if (dev == NULL) {
979 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
980 return IRQ_NONE;
981 }
982
983 lp = netdev_priv(dev);
984 ioaddr = dev->base_addr;
985
986 spin_lock(&lp->lock);
987
988 /* mask the DEPCA board interrupts and turn on the LED */
989 nicsr = inb(DEPCA_NICSR);
990 nicsr |= (IM | LED);
991 outb(nicsr, DEPCA_NICSR);
992
993 outw(CSR0, DEPCA_ADDR);
994 csr0 = inw(DEPCA_DATA);
995
996 /* Acknowledge all of the current interrupt sources ASAP. */
997 outw(csr0 & INTE, DEPCA_DATA);
998
999 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1000 depca_rx(dev);
1001
1002 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1003 depca_tx(dev);
1004
1005 /* Any resources available? */
1006 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1007 netif_wake_queue(dev);
1008 }
1009
1010 /* Unmask the DEPCA board interrupts and turn off the LED */
1011 nicsr = (nicsr & ~IM & ~LED);
1012 outb(nicsr, DEPCA_NICSR);
1013
1014 spin_unlock(&lp->lock);
1015 return IRQ_HANDLED;
1016 }
1017
1018 /* Called with lp->lock held */
1019 static int depca_rx(struct net_device *dev)
1020 {
1021 struct depca_private *lp = netdev_priv(dev);
1022 int i, entry;
1023 s32 status;
1024
1025 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1026 status = readl(&lp->rx_ring[entry].base) >> 16;
1027 if (status & R_STP) { /* Remember start of frame */
1028 lp->rx_old = entry;
1029 }
1030 if (status & R_ENP) { /* Valid frame status */
1031 if (status & R_ERR) { /* There was an error. */
1032 dev->stats.rx_errors++; /* Update the error stats. */
1033 if (status & R_FRAM)
1034 dev->stats.rx_frame_errors++;
1035 if (status & R_OFLO)
1036 dev->stats.rx_over_errors++;
1037 if (status & R_CRC)
1038 dev->stats.rx_crc_errors++;
1039 if (status & R_BUFF)
1040 dev->stats.rx_fifo_errors++;
1041 } else {
1042 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1043 struct sk_buff *skb;
1044
1045 skb = dev_alloc_skb(pkt_len + 2);
1046 if (skb != NULL) {
1047 unsigned char *buf;
1048 skb_reserve(skb, 2); /* 16 byte align the IP header */
1049 buf = skb_put(skb, pkt_len);
1050 if (entry < lp->rx_old) { /* Wrapped buffer */
1051 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1052 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1053 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1054 } else { /* Linear buffer */
1055 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1056 }
1057
1058 /*
1059 ** Notify the upper protocol layers that there is another
1060 ** packet to handle
1061 */
1062 skb->protocol = eth_type_trans(skb, dev);
1063 netif_rx(skb);
1064
1065 /*
1066 ** Update stats
1067 */
1068 dev->stats.rx_packets++;
1069 dev->stats.rx_bytes += pkt_len;
1070 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1071 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1072 lp->pktStats.bins[i]++;
1073 i = DEPCA_PKT_STAT_SZ;
1074 }
1075 }
1076 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1077 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1078 lp->pktStats.broadcast++;
1079 } else {
1080 lp->pktStats.multicast++;
1081 }
1082 } 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])) {
1083 lp->pktStats.unicast++;
1084 }
1085
1086 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1087 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1088 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1089 }
1090 } else {
1091 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1092 dev->stats.rx_dropped++; /* Really, deferred. */
1093 break;
1094 }
1095 }
1096 /* Change buffer ownership for this last frame, back to the adapter */
1097 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1098 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1099 }
1100 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1101 }
1102
1103 /*
1104 ** Update entry information
1105 */
1106 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1107 }
1108
1109 return 0;
1110 }
1111
1112 /*
1113 ** Buffer sent - check for buffer errors.
1114 ** Called with lp->lock held
1115 */
1116 static int depca_tx(struct net_device *dev)
1117 {
1118 struct depca_private *lp = netdev_priv(dev);
1119 int entry;
1120 s32 status;
1121 u_long ioaddr = dev->base_addr;
1122
1123 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1124 status = readl(&lp->tx_ring[entry].base) >> 16;
1125
1126 if (status < 0) { /* Packet not yet sent! */
1127 break;
1128 } else if (status & T_ERR) { /* An error occurred. */
1129 status = readl(&lp->tx_ring[entry].misc);
1130 dev->stats.tx_errors++;
1131 if (status & TMD3_RTRY)
1132 dev->stats.tx_aborted_errors++;
1133 if (status & TMD3_LCAR)
1134 dev->stats.tx_carrier_errors++;
1135 if (status & TMD3_LCOL)
1136 dev->stats.tx_window_errors++;
1137 if (status & TMD3_UFLO)
1138 dev->stats.tx_fifo_errors++;
1139 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1140 /* Trigger an immediate send demand. */
1141 outw(CSR0, DEPCA_ADDR);
1142 outw(INEA | TDMD, DEPCA_DATA);
1143 }
1144 } else if (status & (T_MORE | T_ONE)) {
1145 dev->stats.collisions++;
1146 } else {
1147 dev->stats.tx_packets++;
1148 }
1149
1150 /* Update all the pointers */
1151 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1152 }
1153
1154 return 0;
1155 }
1156
1157 static int depca_close(struct net_device *dev)
1158 {
1159 struct depca_private *lp = netdev_priv(dev);
1160 s16 nicsr;
1161 u_long ioaddr = dev->base_addr;
1162
1163 netif_stop_queue(dev);
1164
1165 outw(CSR0, DEPCA_ADDR);
1166
1167 if (depca_debug > 1) {
1168 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1169 }
1170
1171 /*
1172 ** We stop the DEPCA here -- it occasionally polls
1173 ** memory if we don't.
1174 */
1175 outw(STOP, DEPCA_DATA);
1176
1177 /*
1178 ** Give back the ROM in case the user wants to go to DOS
1179 */
1180 if (lp->adapter != DEPCA) {
1181 nicsr = inb(DEPCA_NICSR);
1182 nicsr &= ~SHE;
1183 outb(nicsr, DEPCA_NICSR);
1184 }
1185
1186 /*
1187 ** Free the associated irq
1188 */
1189 free_irq(dev->irq, dev);
1190 return 0;
1191 }
1192
1193 static void LoadCSRs(struct net_device *dev)
1194 {
1195 struct depca_private *lp = netdev_priv(dev);
1196 u_long ioaddr = dev->base_addr;
1197
1198 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1199 outw((u16) lp->device_ram_start, DEPCA_DATA);
1200 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1201 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1202 outw(CSR3, DEPCA_ADDR); /* ALE control */
1203 outw(ACON, DEPCA_DATA);
1204
1205 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1206
1207 return;
1208 }
1209
1210 static int InitRestartDepca(struct net_device *dev)
1211 {
1212 struct depca_private *lp = netdev_priv(dev);
1213 u_long ioaddr = dev->base_addr;
1214 int i, status = 0;
1215
1216 /* Copy the shadow init_block to shared memory */
1217 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1218
1219 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1220 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1221
1222 /* wait for lance to complete initialisation */
1223 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1224
1225 if (i != 100) {
1226 /* clear IDON by writing a "1", enable interrupts and start lance */
1227 outw(IDON | INEA | STRT, DEPCA_DATA);
1228 if (depca_debug > 2) {
1229 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230 }
1231 } else {
1232 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1233 status = -1;
1234 }
1235
1236 return status;
1237 }
1238
1239 /*
1240 ** Set or clear the multicast filter for this adaptor.
1241 */
1242 static void set_multicast_list(struct net_device *dev)
1243 {
1244 struct depca_private *lp = netdev_priv(dev);
1245 u_long ioaddr = dev->base_addr;
1246
1247 netif_stop_queue(dev);
1248 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1249
1250 STOP_DEPCA; /* Temporarily stop the depca. */
1251 depca_init_ring(dev); /* Initialize the descriptor rings */
1252
1253 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1254 lp->init_block.mode |= PROM;
1255 } else {
1256 SetMulticastFilter(dev);
1257 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1258 }
1259
1260 LoadCSRs(dev); /* Reload CSR3 */
1261 InitRestartDepca(dev); /* Resume normal operation. */
1262 netif_start_queue(dev); /* Unlock the TX ring */
1263 }
1264
1265 /*
1266 ** Calculate the hash code and update the logical address filter
1267 ** from a list of ethernet multicast addresses.
1268 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1269 ** LANCE calculates its hash codes big endian.
1270 */
1271 static void SetMulticastFilter(struct net_device *dev)
1272 {
1273 struct depca_private *lp = netdev_priv(dev);
1274 struct dev_mc_list *dmi = dev->mc_list;
1275 char *addrs;
1276 int i, j, bit, byte;
1277 u16 hashcode;
1278 u32 crc;
1279
1280 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1281 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1282 lp->init_block.mcast_table[i] = (char) 0xff;
1283 }
1284 } else {
1285 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1286 lp->init_block.mcast_table[i] = 0;
1287 }
1288 /* Add multicast addresses */
1289 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1290 addrs = dmi->dmi_addr;
1291 dmi = dmi->next;
1292 if ((*addrs & 0x01) == 1) { /* multicast address? */
1293 crc = ether_crc(ETH_ALEN, addrs);
1294 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1295 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1296 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1297 }
1298
1299
1300 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1301 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1302 lp->init_block.mcast_table[byte] |= bit;
1303 }
1304 }
1305 }
1306
1307 return;
1308 }
1309
1310 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1311 {
1312 int status = 0;
1313
1314 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1315 status = -EBUSY;
1316 goto out;
1317 }
1318
1319 if (DevicePresent(ioaddr)) {
1320 status = -ENODEV;
1321 goto out_release;
1322 }
1323
1324 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1325 status = -ENOMEM;
1326 goto out_release;
1327 }
1328
1329 return 0;
1330
1331 out_release:
1332 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1333 out:
1334 return status;
1335 }
1336
1337 #ifdef CONFIG_MCA
1338 /*
1339 ** Microchannel bus I/O device probe
1340 */
1341 static int __init depca_mca_probe(struct device *device)
1342 {
1343 unsigned char pos[2];
1344 unsigned char where;
1345 unsigned long iobase, mem_start;
1346 int irq, err;
1347 struct mca_device *mdev = to_mca_device (device);
1348 struct net_device *dev;
1349 struct depca_private *lp;
1350
1351 /*
1352 ** Search for the adapter. If an address has been given, search
1353 ** specifically for the card at that address. Otherwise find the
1354 ** first card in the system.
1355 */
1356
1357 pos[0] = mca_device_read_stored_pos(mdev, 2);
1358 pos[1] = mca_device_read_stored_pos(mdev, 3);
1359
1360 /*
1361 ** IO of card is handled by bits 1 and 2 of pos0.
1362 **
1363 ** bit2 bit1 IO
1364 ** 0 0 0x2c00
1365 ** 0 1 0x2c10
1366 ** 1 0 0x2c20
1367 ** 1 1 0x2c30
1368 */
1369 where = (pos[0] & 6) >> 1;
1370 iobase = 0x2c00 + (0x10 * where);
1371
1372 /*
1373 ** Found the adapter we were looking for. Now start setting it up.
1374 **
1375 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1376 ** of pos1. Bits are as follows (from the ADF file):
1377 **
1378 ** Bits
1379 ** 3 2 1 0 IRQ
1380 ** --------------------
1381 ** 0 0 1 0 5
1382 ** 0 0 0 1 9
1383 ** 0 1 0 0 10
1384 ** 1 0 0 0 11
1385 */
1386 where = pos[1] & 0x0f;
1387 switch (where) {
1388 case 1:
1389 irq = 9;
1390 break;
1391 case 2:
1392 irq = 5;
1393 break;
1394 case 4:
1395 irq = 10;
1396 break;
1397 case 8:
1398 irq = 11;
1399 break;
1400 default:
1401 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1402 return -EINVAL;
1403 }
1404
1405 /*
1406 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1407 ** They are mapped as follows:
1408 **
1409 ** Bit
1410 ** 5 4 3 Memory Addresses
1411 ** 0 0 0 C0000-CFFFF (64K)
1412 ** 1 0 0 C8000-CFFFF (32K)
1413 ** 0 0 1 D0000-DFFFF (64K)
1414 ** 1 0 1 D8000-DFFFF (32K)
1415 ** 0 1 0 E0000-EFFFF (64K)
1416 ** 1 1 0 E8000-EFFFF (32K)
1417 */
1418 where = (pos[0] & 0x18) >> 3;
1419 mem_start = 0xc0000 + (where * 0x10000);
1420 if (pos[0] & 0x20) {
1421 mem_start += 0x8000;
1422 }
1423
1424 /* claim the slot */
1425 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1426 sizeof(mdev->name));
1427 mca_device_set_claim(mdev, 1);
1428
1429 /*
1430 ** Get everything allocated and initialized... (almost just
1431 ** like the ISA and EISA probes)
1432 */
1433 irq = mca_device_transform_irq(mdev, irq);
1434 iobase = mca_device_transform_ioport(mdev, iobase);
1435
1436 if ((err = depca_common_init (iobase, &dev)))
1437 goto out_unclaim;
1438
1439 dev->irq = irq;
1440 dev->base_addr = iobase;
1441 lp = netdev_priv(dev);
1442 lp->depca_bus = DEPCA_BUS_MCA;
1443 lp->adapter = depca_mca_adapter_type[mdev->index];
1444 lp->mem_start = mem_start;
1445
1446 if ((err = depca_hw_init(dev, device)))
1447 goto out_free;
1448
1449 return 0;
1450
1451 out_free:
1452 free_netdev (dev);
1453 release_region (iobase, DEPCA_TOTAL_SIZE);
1454 out_unclaim:
1455 mca_device_set_claim(mdev, 0);
1456
1457 return err;
1458 }
1459 #endif
1460
1461 /*
1462 ** ISA bus I/O device probe
1463 */
1464
1465 static void __init depca_platform_probe (void)
1466 {
1467 int i;
1468 struct platform_device *pldev;
1469
1470 for (i = 0; depca_io_ports[i].iobase; i++) {
1471 depca_io_ports[i].device = NULL;
1472
1473 /* if an address has been specified on the command
1474 * line, use it (if valid) */
1475 if (io && io != depca_io_ports[i].iobase)
1476 continue;
1477
1478 pldev = platform_device_alloc(depca_string, i);
1479 if (!pldev)
1480 continue;
1481
1482 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1483 depca_io_ports[i].device = pldev;
1484
1485 if (platform_device_add(pldev)) {
1486 depca_io_ports[i].device = NULL;
1487 pldev->dev.platform_data = NULL;
1488 platform_device_put(pldev);
1489 continue;
1490 }
1491
1492 if (!pldev->dev.driver) {
1493 /* The driver was not bound to this device, there was
1494 * no hardware at this address. Unregister it, as the
1495 * release fuction will take care of freeing the
1496 * allocated structure */
1497
1498 depca_io_ports[i].device = NULL;
1499 pldev->dev.platform_data = NULL;
1500 platform_device_unregister (pldev);
1501 }
1502 }
1503 }
1504
1505 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1506 {
1507 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1508 enum depca_type adapter = unknown;
1509 int i;
1510
1511 for (i = 0; mem_base[i]; i++) {
1512 *mem_start = mem ? mem : mem_base[i];
1513 adapter = DepcaSignature (adapter_name, *mem_start);
1514 if (adapter != unknown)
1515 break;
1516 }
1517
1518 return adapter;
1519 }
1520
1521 static int __init depca_isa_probe (struct platform_device *device)
1522 {
1523 struct net_device *dev;
1524 struct depca_private *lp;
1525 u_long ioaddr, mem_start = 0;
1526 enum depca_type adapter = unknown;
1527 int status = 0;
1528
1529 ioaddr = (u_long) device->dev.platform_data;
1530
1531 if ((status = depca_common_init (ioaddr, &dev)))
1532 goto out;
1533
1534 adapter = depca_shmem_probe (&mem_start);
1535
1536 if (adapter == unknown) {
1537 status = -ENODEV;
1538 goto out_free;
1539 }
1540
1541 dev->base_addr = ioaddr;
1542 dev->irq = irq; /* Use whatever value the user gave
1543 * us, and 0 if he didn't. */
1544 lp = netdev_priv(dev);
1545 lp->depca_bus = DEPCA_BUS_ISA;
1546 lp->adapter = adapter;
1547 lp->mem_start = mem_start;
1548
1549 if ((status = depca_hw_init(dev, &device->dev)))
1550 goto out_free;
1551
1552 return 0;
1553
1554 out_free:
1555 free_netdev (dev);
1556 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1557 out:
1558 return status;
1559 }
1560
1561 /*
1562 ** EISA callbacks from sysfs.
1563 */
1564
1565 #ifdef CONFIG_EISA
1566 static int __init depca_eisa_probe (struct device *device)
1567 {
1568 enum depca_type adapter = unknown;
1569 struct eisa_device *edev;
1570 struct net_device *dev;
1571 struct depca_private *lp;
1572 u_long ioaddr, mem_start;
1573 int status = 0;
1574
1575 edev = to_eisa_device (device);
1576 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1577
1578 if ((status = depca_common_init (ioaddr, &dev)))
1579 goto out;
1580
1581 /* It would have been nice to get card configuration from the
1582 * card. Unfortunately, this register is write-only (shares
1583 * it's address with the ethernet prom)... As we don't parse
1584 * the EISA configuration structures (yet... :-), just rely on
1585 * the ISA probing to sort it out... */
1586
1587 adapter = depca_shmem_probe (&mem_start);
1588 if (adapter == unknown) {
1589 status = -ENODEV;
1590 goto out_free;
1591 }
1592
1593 dev->base_addr = ioaddr;
1594 dev->irq = irq;
1595 lp = netdev_priv(dev);
1596 lp->depca_bus = DEPCA_BUS_EISA;
1597 lp->adapter = edev->id.driver_data;
1598 lp->mem_start = mem_start;
1599
1600 if ((status = depca_hw_init(dev, device)))
1601 goto out_free;
1602
1603 return 0;
1604
1605 out_free:
1606 free_netdev (dev);
1607 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1608 out:
1609 return status;
1610 }
1611 #endif
1612
1613 static int __devexit depca_device_remove (struct device *device)
1614 {
1615 struct net_device *dev;
1616 struct depca_private *lp;
1617 int bus;
1618
1619 dev = dev_get_drvdata(device);
1620 lp = netdev_priv(dev);
1621
1622 unregister_netdev (dev);
1623 iounmap (lp->sh_mem);
1624 release_mem_region (lp->mem_start, lp->mem_len);
1625 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1626 bus = lp->depca_bus;
1627 free_netdev (dev);
1628
1629 return 0;
1630 }
1631
1632 /*
1633 ** Look for a particular board name in the on-board Remote Diagnostics
1634 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1635 ** base address.
1636 */
1637 static int __init DepcaSignature(char *name, u_long base_addr)
1638 {
1639 u_int i, j, k;
1640 void __iomem *ptr;
1641 char tmpstr[16];
1642 u_long prom_addr = base_addr + 0xc000;
1643 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1644
1645 /* Can't reserve the prom region, it is already marked as
1646 * used, at least on x86. Instead, reserve a memory region a
1647 * board would certainly use. If it works, go ahead. If not,
1648 * run like hell... */
1649
1650 if (!request_mem_region (mem_addr, 16, depca_string))
1651 return unknown;
1652
1653 /* Copy the first 16 bytes of ROM */
1654
1655 ptr = ioremap(prom_addr, 16);
1656 if (ptr == NULL) {
1657 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1658 return unknown;
1659 }
1660 for (i = 0; i < 16; i++) {
1661 tmpstr[i] = readb(ptr + i);
1662 }
1663 iounmap(ptr);
1664
1665 release_mem_region (mem_addr, 16);
1666
1667 /* Check if PROM contains a valid string */
1668 for (i = 0; *depca_signature[i] != '\0'; i++) {
1669 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1670 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1671 k++;
1672 } else { /* lost signature; begin search again */
1673 k = 0;
1674 }
1675 }
1676 if (k == strlen(depca_signature[i]))
1677 break;
1678 }
1679
1680 /* Check if name string is valid, provided there's no PROM */
1681 if (name && *name && (i == unknown)) {
1682 for (i = 0; *depca_signature[i] != '\0'; i++) {
1683 if (strcmp(name, depca_signature[i]) == 0)
1684 break;
1685 }
1686 }
1687
1688 return i;
1689 }
1690
1691 /*
1692 ** Look for a special sequence in the Ethernet station address PROM that
1693 ** is common across all DEPCA products. Note that the original DEPCA needs
1694 ** its ROM address counter to be initialized and enabled. Only enable
1695 ** if the first address octet is a 0x08 - this minimises the chances of
1696 ** messing around with some other hardware, but it assumes that this DEPCA
1697 ** card initialized itself correctly.
1698 **
1699 ** Search the Ethernet address ROM for the signature. Since the ROM address
1700 ** counter can start at an arbitrary point, the search must include the entire
1701 ** probe sequence length plus the (length_of_the_signature - 1).
1702 ** Stop the search IMMEDIATELY after the signature is found so that the
1703 ** PROM address counter is correctly positioned at the start of the
1704 ** ethernet address for later read out.
1705 */
1706 static int __init DevicePresent(u_long ioaddr)
1707 {
1708 union {
1709 struct {
1710 u32 a;
1711 u32 b;
1712 } llsig;
1713 char Sig[sizeof(u32) << 1];
1714 }
1715 dev;
1716 short sigLength = 0;
1717 s8 data;
1718 s16 nicsr;
1719 int i, j, status = 0;
1720
1721 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1722 data = inb(DEPCA_PROM); /* read data */
1723
1724 if (data == 0x08) { /* Enable counter on DEPCA */
1725 nicsr = inb(DEPCA_NICSR);
1726 nicsr |= AAC;
1727 outb(nicsr, DEPCA_NICSR);
1728 }
1729
1730 dev.llsig.a = ETH_PROM_SIG;
1731 dev.llsig.b = ETH_PROM_SIG;
1732 sigLength = sizeof(u32) << 1;
1733
1734 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1735 data = inb(DEPCA_PROM);
1736 if (dev.Sig[j] == data) { /* track signature */
1737 j++;
1738 } else { /* lost signature; begin search again */
1739 if (data == dev.Sig[0]) { /* rare case.... */
1740 j = 1;
1741 } else {
1742 j = 0;
1743 }
1744 }
1745 }
1746
1747 if (j != sigLength) {
1748 status = -ENODEV; /* search failed */
1749 }
1750
1751 return status;
1752 }
1753
1754 /*
1755 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1756 ** reason: access the upper half of the PROM with x=0; access the lower half
1757 ** with x=1.
1758 */
1759 static int __init get_hw_addr(struct net_device *dev)
1760 {
1761 u_long ioaddr = dev->base_addr;
1762 struct depca_private *lp = netdev_priv(dev);
1763 int i, k, tmp, status = 0;
1764 u_short j, x, chksum;
1765
1766 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1767
1768 for (i = 0, k = 0, j = 0; j < 3; j++) {
1769 k <<= 1;
1770 if (k > 0xffff)
1771 k -= 0xffff;
1772
1773 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1774 dev->dev_addr[i++] = (u_char) tmp;
1775 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1776 dev->dev_addr[i++] = (u_char) tmp;
1777
1778 if (k > 0xffff)
1779 k -= 0xffff;
1780 }
1781 if (k == 0xffff)
1782 k = 0;
1783
1784 chksum = (u_char) inb(DEPCA_PROM + x);
1785 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1786 if (k != chksum)
1787 status = -1;
1788
1789 return status;
1790 }
1791
1792 /*
1793 ** Load a packet into the shared memory
1794 */
1795 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1796 {
1797 struct depca_private *lp = netdev_priv(dev);
1798 int i, entry, end, len, status = NETDEV_TX_OK;
1799
1800 entry = lp->tx_new; /* Ring around buffer number. */
1801 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1802 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1803 /*
1804 ** Caution: the write order is important here... don't set up the
1805 ** ownership rights until all the other information is in place.
1806 */
1807 if (end < entry) { /* wrapped buffer */
1808 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1809 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1810 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1811 } else { /* linear buffer */
1812 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1813 }
1814
1815 /* set up the buffer descriptors */
1816 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1817 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1818 /* clean out flags */
1819 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1820 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1821 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1822 len -= TX_BUFF_SZ;
1823 }
1824 /* clean out flags */
1825 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1826 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1827 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1828
1829 /* start of packet */
1830 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1831 /* end of packet */
1832 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1833
1834 for (i = end; i != entry; --i) {
1835 /* ownership of packet */
1836 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1837 if (i == 0)
1838 i = lp->txRingMask + 1;
1839 }
1840 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1841
1842 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1843 } else {
1844 status = NETDEV_TX_LOCKED;
1845 }
1846
1847 return status;
1848 }
1849
1850 static void depca_dbg_open(struct net_device *dev)
1851 {
1852 struct depca_private *lp = netdev_priv(dev);
1853 u_long ioaddr = dev->base_addr;
1854 struct depca_init *p = &lp->init_block;
1855 int i;
1856
1857 if (depca_debug > 1) {
1858 /* Do not copy the shadow init block into shared memory */
1859 /* Debugging should not affect normal operation! */
1860 /* The shadow init block will get copied across during InitRestartDepca */
1861 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1862 printk("Descriptor head addresses (CPU):\n");
1863 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1864 printk("Descriptor addresses (CPU):\nRX: ");
1865 for (i = 0; i < lp->rxRingMask; i++) {
1866 if (i < 3) {
1867 printk("%p ", &lp->rx_ring[i].base);
1868 }
1869 }
1870 printk("...%p\n", &lp->rx_ring[i].base);
1871 printk("TX: ");
1872 for (i = 0; i < lp->txRingMask; i++) {
1873 if (i < 3) {
1874 printk("%p ", &lp->tx_ring[i].base);
1875 }
1876 }
1877 printk("...%p\n", &lp->tx_ring[i].base);
1878 printk("\nDescriptor buffers (Device):\nRX: ");
1879 for (i = 0; i < lp->rxRingMask; i++) {
1880 if (i < 3) {
1881 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1882 }
1883 }
1884 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1885 printk("TX: ");
1886 for (i = 0; i < lp->txRingMask; i++) {
1887 if (i < 3) {
1888 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1889 }
1890 }
1891 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1892 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1893 printk(" mode: 0x%4.4x\n", p->mode);
1894 printk(" physical address: %pM\n", p->phys_addr);
1895 printk(" multicast hash table: ");
1896 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1897 printk("%2.2x:", p->mcast_table[i]);
1898 }
1899 printk("%2.2x\n", p->mcast_table[i]);
1900 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1901 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1902 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1903 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1904 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1905 outw(CSR2, DEPCA_ADDR);
1906 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1907 outw(CSR1, DEPCA_ADDR);
1908 printk("%4.4x\n", inw(DEPCA_DATA));
1909 outw(CSR3, DEPCA_ADDR);
1910 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1911 }
1912
1913 return;
1914 }
1915
1916 /*
1917 ** Perform IOCTL call functions here. Some are privileged operations and the
1918 ** effective uid is checked in those cases.
1919 ** All multicast IOCTLs will not work here and are for testing purposes only.
1920 */
1921 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1922 {
1923 struct depca_private *lp = netdev_priv(dev);
1924 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1925 int i, status = 0;
1926 u_long ioaddr = dev->base_addr;
1927 union {
1928 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1929 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1930 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1931 } tmp;
1932 unsigned long flags;
1933 void *buf;
1934
1935 switch (ioc->cmd) {
1936 case DEPCA_GET_HWADDR: /* Get the hardware address */
1937 for (i = 0; i < ETH_ALEN; i++) {
1938 tmp.addr[i] = dev->dev_addr[i];
1939 }
1940 ioc->len = ETH_ALEN;
1941 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1942 return -EFAULT;
1943 break;
1944
1945 case DEPCA_SET_HWADDR: /* Set the hardware address */
1946 if (!capable(CAP_NET_ADMIN))
1947 return -EPERM;
1948 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1949 return -EFAULT;
1950 for (i = 0; i < ETH_ALEN; i++) {
1951 dev->dev_addr[i] = tmp.addr[i];
1952 }
1953 netif_stop_queue(dev);
1954 while (lp->tx_old != lp->tx_new)
1955 cpu_relax(); /* Wait for the ring to empty */
1956
1957 STOP_DEPCA; /* Temporarily stop the depca. */
1958 depca_init_ring(dev); /* Initialize the descriptor rings */
1959 LoadCSRs(dev); /* Reload CSR3 */
1960 InitRestartDepca(dev); /* Resume normal operation. */
1961 netif_start_queue(dev); /* Unlock the TX ring */
1962 break;
1963
1964 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1965 if (!capable(CAP_NET_ADMIN))
1966 return -EPERM;
1967 netif_stop_queue(dev);
1968 while (lp->tx_old != lp->tx_new)
1969 cpu_relax(); /* Wait for the ring to empty */
1970
1971 STOP_DEPCA; /* Temporarily stop the depca. */
1972 depca_init_ring(dev); /* Initialize the descriptor rings */
1973 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1974
1975 LoadCSRs(dev); /* Reload CSR3 */
1976 InitRestartDepca(dev); /* Resume normal operation. */
1977 netif_start_queue(dev); /* Unlock the TX ring */
1978 break;
1979
1980 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1981 if (!capable(CAP_NET_ADMIN))
1982 return -EPERM;
1983 netif_stop_queue(dev);
1984 while (lp->tx_old != lp->tx_new)
1985 cpu_relax(); /* Wait for the ring to empty */
1986
1987 STOP_DEPCA; /* Temporarily stop the depca. */
1988 depca_init_ring(dev); /* Initialize the descriptor rings */
1989 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1990
1991 LoadCSRs(dev); /* Reload CSR3 */
1992 InitRestartDepca(dev); /* Resume normal operation. */
1993 netif_start_queue(dev); /* Unlock the TX ring */
1994 break;
1995
1996 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1997 if(!capable(CAP_NET_ADMIN))
1998 return -EPERM;
1999 printk("%s: Boo!\n", dev->name);
2000 break;
2001
2002 case DEPCA_GET_MCA: /* Get the multicast address table */
2003 ioc->len = (HASH_TABLE_LEN >> 3);
2004 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2005 return -EFAULT;
2006 break;
2007
2008 case DEPCA_SET_MCA: /* Set a multicast address */
2009 if (!capable(CAP_NET_ADMIN))
2010 return -EPERM;
2011 if (ioc->len >= HASH_TABLE_LEN)
2012 return -EINVAL;
2013 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2014 return -EFAULT;
2015 set_multicast_list(dev);
2016 break;
2017
2018 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2019 if (!capable(CAP_NET_ADMIN))
2020 return -EPERM;
2021 set_multicast_list(dev);
2022 break;
2023
2024 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2025 if (!capable(CAP_NET_ADMIN))
2026 return -EPERM;
2027 set_multicast_list(dev);
2028 break;
2029
2030 case DEPCA_GET_STATS: /* Get the driver statistics */
2031 ioc->len = sizeof(lp->pktStats);
2032 buf = kmalloc(ioc->len, GFP_KERNEL);
2033 if(!buf)
2034 return -ENOMEM;
2035 spin_lock_irqsave(&lp->lock, flags);
2036 memcpy(buf, &lp->pktStats, ioc->len);
2037 spin_unlock_irqrestore(&lp->lock, flags);
2038 if (copy_to_user(ioc->data, buf, ioc->len))
2039 status = -EFAULT;
2040 kfree(buf);
2041 break;
2042
2043 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2044 if (!capable(CAP_NET_ADMIN))
2045 return -EPERM;
2046 spin_lock_irqsave(&lp->lock, flags);
2047 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2048 spin_unlock_irqrestore(&lp->lock, flags);
2049 break;
2050
2051 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2052 i = 0;
2053 tmp.sval[i++] = inw(DEPCA_NICSR);
2054 outw(CSR0, DEPCA_ADDR); /* status register */
2055 tmp.sval[i++] = inw(DEPCA_DATA);
2056 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2057 ioc->len = i + sizeof(struct depca_init);
2058 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2059 return -EFAULT;
2060 break;
2061
2062 default:
2063 return -EOPNOTSUPP;
2064 }
2065
2066 return status;
2067 }
2068
2069 static int __init depca_module_init (void)
2070 {
2071 int err = 0;
2072
2073 #ifdef CONFIG_MCA
2074 err = mca_register_driver (&depca_mca_driver);
2075 #endif
2076 #ifdef CONFIG_EISA
2077 err |= eisa_driver_register (&depca_eisa_driver);
2078 #endif
2079 err |= platform_driver_register (&depca_isa_driver);
2080 depca_platform_probe ();
2081
2082 return err;
2083 }
2084
2085 static void __exit depca_module_exit (void)
2086 {
2087 int i;
2088 #ifdef CONFIG_MCA
2089 mca_unregister_driver (&depca_mca_driver);
2090 #endif
2091 #ifdef CONFIG_EISA
2092 eisa_driver_unregister (&depca_eisa_driver);
2093 #endif
2094 platform_driver_unregister (&depca_isa_driver);
2095
2096 for (i = 0; depca_io_ports[i].iobase; i++) {
2097 if (depca_io_ports[i].device) {
2098 depca_io_ports[i].device->dev.platform_data = NULL;
2099 platform_device_unregister (depca_io_ports[i].device);
2100 depca_io_ports[i].device = NULL;
2101 }
2102 }
2103 }
2104
2105 module_init (depca_module_init);
2106 module_exit (depca_module_exit);
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