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[NET]: Avoid allocating skb in skb_pad
[deliverable/linux.git] / drivers / net / depca.c
1 /* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
2
3 Written 1994, 1995 by David C. Davies.
4
5
6 Copyright 1994 David C. Davies
7 and
8 United States Government
9 (as represented by the Director, National Security Agency).
10
11 Copyright 1995 Digital Equipment Corporation.
12
13
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
16
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
19
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
28
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
31
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
36
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
39
40 The author may be reached at davies@maniac.ultranet.com
41
42 =========================================================================
43
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
48
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
64
65
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
68
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
79
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
84
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
97
98 ************************************************************************
99
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
107
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
110
111 ************************************************************************
112
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
117
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
121
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
124
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
140 7) enjoy!
141
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
144
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
147
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
151 option will not work with kernel built-in depca's.
152
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
156
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
160 fully stress-tested).
161
162 Currently known bugs/limitations:
163
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
169
170 ************************************************************************
171 TO DO:
172 ------
173
174
175 Revision History
176 ----------------
177
178 Version Date Description
179
180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
201 0.385 3-apr-95 Fix a recognition bug reported by
202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
211 Both above from a suggestion by
212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
221 by <tymm@computer.org>
222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
234
235 =========================================================================
236 */
237
238 #include <linux/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/platform_device.h>
258 #include <linux/bitops.h>
259
260 #include <asm/uaccess.h>
261 #include <asm/io.h>
262 #include <asm/dma.h>
263
264 #ifdef CONFIG_MCA
265 #include <linux/mca.h>
266 #endif
267
268 #ifdef CONFIG_EISA
269 #include <linux/eisa.h>
270 #endif
271
272 #include "depca.h"
273
274 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
275
276 #ifdef DEPCA_DEBUG
277 static int depca_debug = DEPCA_DEBUG;
278 #else
279 static int depca_debug = 1;
280 #endif
281
282 #define DEPCA_NDA 0xffe0 /* No Device Address */
283
284 #define TX_TIMEOUT (1*HZ)
285
286 /*
287 ** Ethernet PROM defines
288 */
289 #define PROBE_LENGTH 32
290 #define ETH_PROM_SIG 0xAA5500FFUL
291
292 /*
293 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
294 ** here is <= to the amount of shared memory set up by the board switches.
295 ** The number of descriptors MUST BE A POWER OF 2.
296 **
297 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
298 */
299 #define NUM_RX_DESC 8 /* Number of RX descriptors */
300 #define NUM_TX_DESC 8 /* Number of TX descriptors */
301 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
302 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
303
304 /*
305 ** EISA bus defines
306 */
307 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
308
309 /*
310 ** ISA Bus defines
311 */
312 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
313 #define DEPCA_TOTAL_SIZE 0x10
314
315 static struct {
316 u_long iobase;
317 struct platform_device *device;
318 } depca_io_ports[] = {
319 { 0x300, NULL },
320 { 0x200, NULL },
321 { 0 , NULL },
322 };
323
324 /*
325 ** Name <-> Adapter mapping
326 */
327 #define DEPCA_SIGNATURE {"DEPCA",\
328 "DE100","DE101",\
329 "DE200","DE201","DE202",\
330 "DE210","DE212",\
331 "DE422",\
332 ""}
333
334 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
335
336 enum depca_type {
337 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
338 };
339
340 static char depca_string[] = "depca";
341
342 static int depca_device_remove (struct device *device);
343
344 #ifdef CONFIG_EISA
345 static struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
347 { "" }
348 };
349 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
350
351 static int depca_eisa_probe (struct device *device);
352
353 static struct eisa_driver depca_eisa_driver = {
354 .id_table = depca_eisa_ids,
355 .driver = {
356 .name = depca_string,
357 .probe = depca_eisa_probe,
358 .remove = __devexit_p (depca_device_remove)
359 }
360 };
361 #endif
362
363 #ifdef CONFIG_MCA
364 /*
365 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
366 */
367 #define DE210_ID 0x628d
368 #define DE212_ID 0x6def
369
370 static short depca_mca_adapter_ids[] = {
371 DE210_ID,
372 DE212_ID,
373 0x0000
374 };
375
376 static char *depca_mca_adapter_name[] = {
377 "DEC EtherWORKS MC Adapter (DE210)",
378 "DEC EtherWORKS MC Adapter (DE212)",
379 NULL
380 };
381
382 static enum depca_type depca_mca_adapter_type[] = {
383 de210,
384 de212,
385 0
386 };
387
388 static int depca_mca_probe (struct device *);
389
390 static struct mca_driver depca_mca_driver = {
391 .id_table = depca_mca_adapter_ids,
392 .driver = {
393 .name = depca_string,
394 .bus = &mca_bus_type,
395 .probe = depca_mca_probe,
396 .remove = __devexit_p(depca_device_remove),
397 },
398 };
399 #endif
400
401 static int depca_isa_probe (struct platform_device *);
402
403 static int __devexit depca_isa_remove(struct platform_device *pdev)
404 {
405 return depca_device_remove(&pdev->dev);
406 }
407
408 static struct platform_driver depca_isa_driver = {
409 .probe = depca_isa_probe,
410 .remove = __devexit_p(depca_isa_remove),
411 .driver = {
412 .name = depca_string,
413 },
414 };
415
416 /*
417 ** Miscellaneous info...
418 */
419 #define DEPCA_STRLEN 16
420
421 /*
422 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
423 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
424 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
425 ** and hence the RX descriptor ring's first entry.
426 */
427 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
428 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
429 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
430
431 /*
432 ** The DEPCA Rx and Tx ring descriptors.
433 */
434 struct depca_rx_desc {
435 volatile s32 base;
436 s16 buf_length; /* This length is negative 2's complement! */
437 s16 msg_length; /* This length is "normal". */
438 };
439
440 struct depca_tx_desc {
441 volatile s32 base;
442 s16 length; /* This length is negative 2's complement! */
443 s16 misc; /* Errors and TDR info */
444 };
445
446 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
447 to LANCE memory address space */
448
449 /*
450 ** The Lance initialization block, described in databook, in common memory.
451 */
452 struct depca_init {
453 u16 mode; /* Mode register */
454 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
455 u8 mcast_table[8]; /* Multicast Hash Table. */
456 u32 rx_ring; /* Rx ring base pointer & ring length */
457 u32 tx_ring; /* Tx ring base pointer & ring length */
458 };
459
460 #define DEPCA_PKT_STAT_SZ 16
461 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
462 increase DEPCA_PKT_STAT_SZ */
463 struct depca_private {
464 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
465 enum depca_type adapter; /* Adapter type */
466 enum {
467 DEPCA_BUS_MCA = 1,
468 DEPCA_BUS_ISA,
469 DEPCA_BUS_EISA,
470 } depca_bus; /* type of bus */
471 struct depca_init init_block; /* Shadow Initialization block */
472 /* CPU address space fields */
473 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
474 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
475 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
477 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
478 u_long mem_start; /* Bus address of device RAM (before remap) */
479 u_long mem_len; /* device memory size */
480 /* Device address space fields */
481 u_long device_ram_start; /* Start of RAM in device addr space */
482 /* Offsets used in both address spaces */
483 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
484 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
485 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
486 /* Kernel-only (not device) fields */
487 int rx_new, tx_new; /* The next free ring entry */
488 int rx_old, tx_old; /* The ring entries to be free()ed. */
489 struct net_device_stats stats;
490 spinlock_t lock;
491 struct { /* Private stats counters */
492 u32 bins[DEPCA_PKT_STAT_SZ];
493 u32 unicast;
494 u32 multicast;
495 u32 broadcast;
496 u32 excessive_collisions;
497 u32 tx_underruns;
498 u32 excessive_underruns;
499 } pktStats;
500 int txRingMask; /* TX ring mask */
501 int rxRingMask; /* RX ring mask */
502 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
503 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
504 };
505
506 /*
507 ** The transmit ring full condition is described by the tx_old and tx_new
508 ** pointers by:
509 ** tx_old = tx_new Empty ring
510 ** tx_old = tx_new+1 Full ring
511 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
512 */
513 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
514 lp->tx_old+lp->txRingMask-lp->tx_new:\
515 lp->tx_old -lp->tx_new-1)
516
517 /*
518 ** Public Functions
519 */
520 static int depca_open(struct net_device *dev);
521 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
522 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs);
523 static int depca_close(struct net_device *dev);
524 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
525 static void depca_tx_timeout(struct net_device *dev);
526 static struct net_device_stats *depca_get_stats(struct net_device *dev);
527 static void set_multicast_list(struct net_device *dev);
528
529 /*
530 ** Private functions
531 */
532 static void depca_init_ring(struct net_device *dev);
533 static int depca_rx(struct net_device *dev);
534 static int depca_tx(struct net_device *dev);
535
536 static void LoadCSRs(struct net_device *dev);
537 static int InitRestartDepca(struct net_device *dev);
538 static int DepcaSignature(char *name, u_long paddr);
539 static int DevicePresent(u_long ioaddr);
540 static int get_hw_addr(struct net_device *dev);
541 static void SetMulticastFilter(struct net_device *dev);
542 static int load_packet(struct net_device *dev, struct sk_buff *skb);
543 static void depca_dbg_open(struct net_device *dev);
544
545 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
546 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
547 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
548 static u_char *depca_irq;
549
550 static int irq;
551 static int io;
552 static char *adapter_name;
553 static int mem; /* For loadable module assignment
554 use insmod mem=0x????? .... */
555 module_param (irq, int, 0);
556 module_param (io, int, 0);
557 module_param (adapter_name, charp, 0);
558 module_param (mem, int, 0);
559 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
560 MODULE_PARM_DESC(io, "DEPCA I/O base address");
561 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
562 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
563 MODULE_LICENSE("GPL");
564
565 /*
566 ** Miscellaneous defines...
567 */
568 #define STOP_DEPCA \
569 outw(CSR0, DEPCA_ADDR);\
570 outw(STOP, DEPCA_DATA)
571
572 static int __init depca_hw_init (struct net_device *dev, struct device *device)
573 {
574 struct depca_private *lp;
575 int i, j, offset, netRAM, mem_len, status = 0;
576 s16 nicsr;
577 u_long ioaddr;
578 u_long mem_start;
579
580 /*
581 * We are now supposed to enter this function with the
582 * following fields filled with proper values :
583 *
584 * dev->base_addr
585 * lp->mem_start
586 * lp->depca_bus
587 * lp->adapter
588 *
589 * dev->irq can be set if known from device configuration (on
590 * MCA or EISA) or module option. Otherwise, it will be auto
591 * detected.
592 */
593
594 ioaddr = dev->base_addr;
595
596 STOP_DEPCA;
597
598 nicsr = inb(DEPCA_NICSR);
599 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
600 outb(nicsr, DEPCA_NICSR);
601
602 if (inw(DEPCA_DATA) != STOP) {
603 return -ENXIO;
604 }
605
606 lp = (struct depca_private *) dev->priv;
607 mem_start = lp->mem_start;
608
609 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
610 return -ENXIO;
611
612 printk ("%s: %s at 0x%04lx",
613 device->bus_id, depca_signature[lp->adapter], ioaddr);
614
615 switch (lp->depca_bus) {
616 #ifdef CONFIG_MCA
617 case DEPCA_BUS_MCA:
618 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
619 break;
620 #endif
621
622 #ifdef CONFIG_EISA
623 case DEPCA_BUS_EISA:
624 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
625 break;
626 #endif
627
628 case DEPCA_BUS_ISA:
629 break;
630
631 default:
632 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
633 return -ENXIO;
634 }
635
636 printk(", h/w address ");
637 status = get_hw_addr(dev);
638 if (status != 0) {
639 printk(" which has an Ethernet PROM CRC error.\n");
640 return -ENXIO;
641 }
642 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
643 printk("%2.2x:", dev->dev_addr[i]);
644 }
645 printk("%2.2x", dev->dev_addr[i]);
646
647 /* Set up the maximum amount of network RAM(kB) */
648 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
649 if ((nicsr & _128KB) && (lp->adapter == de422))
650 netRAM = 128;
651
652 /* Shared Memory Base Address */
653 if (nicsr & BUF) {
654 nicsr &= ~BS; /* DEPCA RAM in top 32k */
655 netRAM -= 32;
656
657 /* Only EISA/ISA needs start address to be re-computed */
658 if (lp->depca_bus != DEPCA_BUS_MCA)
659 mem_start += 0x8000;
660 }
661
662 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)))
663 > (netRAM << 10)) {
664 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
665 return -ENXIO;
666 }
667
668 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
669
670 /* Enable the shadow RAM. */
671 if (lp->adapter != DEPCA) {
672 nicsr |= SHE;
673 outb(nicsr, DEPCA_NICSR);
674 }
675
676 spin_lock_init(&lp->lock);
677 sprintf(lp->adapter_name, "%s (%s)",
678 depca_signature[lp->adapter], device->bus_id);
679 status = -EBUSY;
680
681 /* Initialisation Block */
682 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
683 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
684 goto out_priv;
685 }
686
687 status = -EIO;
688 lp->sh_mem = ioremap(mem_start, mem_len);
689 if (lp->sh_mem == NULL) {
690 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
691 goto out1;
692 }
693
694 lp->mem_start = mem_start;
695 lp->mem_len = mem_len;
696 lp->device_ram_start = mem_start & LA_MASK;
697
698 offset = 0;
699 offset += sizeof(struct depca_init);
700
701 /* Tx & Rx descriptors (aligned to a quadword boundary) */
702 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
703 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
704 lp->rx_ring_offset = offset;
705
706 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
707 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
708 lp->tx_ring_offset = offset;
709
710 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
711
712 lp->buffs_offset = offset;
713
714 /* Finish initialising the ring information. */
715 lp->rxRingMask = NUM_RX_DESC - 1;
716 lp->txRingMask = NUM_TX_DESC - 1;
717
718 /* Calculate Tx/Rx RLEN size for the descriptors. */
719 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
720 j >>= 1;
721 }
722 lp->rx_rlen = (s32) (i << 29);
723 for (i = 0, j = lp->txRingMask; j > 0; i++) {
724 j >>= 1;
725 }
726 lp->tx_rlen = (s32) (i << 29);
727
728 /* Load the initialisation block */
729 depca_init_ring(dev);
730
731 /* Initialise the control and status registers */
732 LoadCSRs(dev);
733
734 /* Enable DEPCA board interrupts for autoprobing */
735 nicsr = ((nicsr & ~IM) | IEN);
736 outb(nicsr, DEPCA_NICSR);
737
738 /* To auto-IRQ we enable the initialization-done and DMA err,
739 interrupts. For now we will always get a DMA error. */
740 if (dev->irq < 2) {
741 unsigned char irqnum;
742 unsigned long irq_mask, delay;
743
744 irq_mask = probe_irq_on();
745
746 /* Assign the correct irq list */
747 switch (lp->adapter) {
748 case DEPCA:
749 case de100:
750 case de101:
751 depca_irq = de1xx_irq;
752 break;
753 case de200:
754 case de201:
755 case de202:
756 case de210:
757 case de212:
758 depca_irq = de2xx_irq;
759 break;
760 case de422:
761 depca_irq = de422_irq;
762 break;
763
764 default:
765 break; /* Not reached */
766 }
767
768 /* Trigger an initialization just for the interrupt. */
769 outw(INEA | INIT, DEPCA_DATA);
770
771 delay = jiffies + HZ/50;
772 while (time_before(jiffies, delay))
773 yield();
774
775 irqnum = probe_irq_off(irq_mask);
776
777 status = -ENXIO;
778 if (!irqnum) {
779 printk(" and failed to detect IRQ line.\n");
780 goto out2;
781 } else {
782 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
783 if (irqnum == depca_irq[i]) {
784 dev->irq = irqnum;
785 printk(" and uses IRQ%d.\n", dev->irq);
786 }
787
788 if (!dev->irq) {
789 printk(" but incorrect IRQ line detected.\n");
790 goto out2;
791 }
792 }
793 } else {
794 printk(" and assigned IRQ%d.\n", dev->irq);
795 }
796
797 if (depca_debug > 1) {
798 printk(version);
799 }
800
801 /* The DEPCA-specific entries in the device structure. */
802 dev->open = &depca_open;
803 dev->hard_start_xmit = &depca_start_xmit;
804 dev->stop = &depca_close;
805 dev->get_stats = &depca_get_stats;
806 dev->set_multicast_list = &set_multicast_list;
807 dev->do_ioctl = &depca_ioctl;
808 dev->tx_timeout = depca_tx_timeout;
809 dev->watchdog_timeo = TX_TIMEOUT;
810
811 dev->mem_start = 0;
812
813 device->driver_data = dev;
814 SET_NETDEV_DEV (dev, device);
815
816 status = register_netdev(dev);
817 if (status == 0)
818 return 0;
819 out2:
820 iounmap(lp->sh_mem);
821 out1:
822 release_mem_region (mem_start, mem_len);
823 out_priv:
824 return status;
825 }
826 \f
827
828 static int depca_open(struct net_device *dev)
829 {
830 struct depca_private *lp = (struct depca_private *) dev->priv;
831 u_long ioaddr = dev->base_addr;
832 s16 nicsr;
833 int status = 0;
834
835 STOP_DEPCA;
836 nicsr = inb(DEPCA_NICSR);
837
838 /* Make sure the shadow RAM is enabled */
839 if (lp->adapter != DEPCA) {
840 nicsr |= SHE;
841 outb(nicsr, DEPCA_NICSR);
842 }
843
844 /* Re-initialize the DEPCA... */
845 depca_init_ring(dev);
846 LoadCSRs(dev);
847
848 depca_dbg_open(dev);
849
850 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
851 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
852 status = -EAGAIN;
853 } else {
854
855 /* Enable DEPCA board interrupts and turn off LED */
856 nicsr = ((nicsr & ~IM & ~LED) | IEN);
857 outb(nicsr, DEPCA_NICSR);
858 outw(CSR0, DEPCA_ADDR);
859
860 netif_start_queue(dev);
861
862 status = InitRestartDepca(dev);
863
864 if (depca_debug > 1) {
865 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
866 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
867 }
868 }
869 return status;
870 }
871
872 /* Initialize the lance Rx and Tx descriptor rings. */
873 static void depca_init_ring(struct net_device *dev)
874 {
875 struct depca_private *lp = (struct depca_private *) dev->priv;
876 u_int i;
877 u_long offset;
878
879 /* Lock out other processes whilst setting up the hardware */
880 netif_stop_queue(dev);
881
882 lp->rx_new = lp->tx_new = 0;
883 lp->rx_old = lp->tx_old = 0;
884
885 /* Initialize the base address and length of each buffer in the ring */
886 for (i = 0; i <= lp->rxRingMask; i++) {
887 offset = lp->buffs_offset + i * RX_BUFF_SZ;
888 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
889 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
890 lp->rx_buff[i] = lp->sh_mem + offset;
891 }
892
893 for (i = 0; i <= lp->txRingMask; i++) {
894 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
895 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
896 lp->tx_buff[i] = lp->sh_mem + offset;
897 }
898
899 /* Set up the initialization block */
900 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
901 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
902
903 SetMulticastFilter(dev);
904
905 for (i = 0; i < ETH_ALEN; i++) {
906 lp->init_block.phys_addr[i] = dev->dev_addr[i];
907 }
908
909 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
910 }
911
912
913 static void depca_tx_timeout(struct net_device *dev)
914 {
915 u_long ioaddr = dev->base_addr;
916
917 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
918
919 STOP_DEPCA;
920 depca_init_ring(dev);
921 LoadCSRs(dev);
922 dev->trans_start = jiffies;
923 netif_wake_queue(dev);
924 InitRestartDepca(dev);
925 }
926
927
928 /*
929 ** Writes a socket buffer to TX descriptor ring and starts transmission
930 */
931 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
932 {
933 struct depca_private *lp = (struct depca_private *) dev->priv;
934 u_long ioaddr = dev->base_addr;
935 int status = 0;
936
937 /* Transmitter timeout, serious problems. */
938 if (skb->len < 1)
939 goto out;
940
941 if (skb_padto(skb, ETH_ZLEN))
942 goto out;
943
944 netif_stop_queue(dev);
945
946 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
947 status = load_packet(dev, skb);
948
949 if (!status) {
950 /* Trigger an immediate send demand. */
951 outw(CSR0, DEPCA_ADDR);
952 outw(INEA | TDMD, DEPCA_DATA);
953
954 dev->trans_start = jiffies;
955 dev_kfree_skb(skb);
956 }
957 if (TX_BUFFS_AVAIL)
958 netif_start_queue(dev);
959 } else
960 status = -1;
961
962 out:
963 return status;
964 }
965
966 /*
967 ** The DEPCA interrupt handler.
968 */
969 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
970 {
971 struct net_device *dev = dev_id;
972 struct depca_private *lp;
973 s16 csr0, nicsr;
974 u_long ioaddr;
975
976 if (dev == NULL) {
977 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
978 return IRQ_NONE;
979 }
980
981 lp = (struct depca_private *) dev->priv;
982 ioaddr = dev->base_addr;
983
984 spin_lock(&lp->lock);
985
986 /* mask the DEPCA board interrupts and turn on the LED */
987 nicsr = inb(DEPCA_NICSR);
988 nicsr |= (IM | LED);
989 outb(nicsr, DEPCA_NICSR);
990
991 outw(CSR0, DEPCA_ADDR);
992 csr0 = inw(DEPCA_DATA);
993
994 /* Acknowledge all of the current interrupt sources ASAP. */
995 outw(csr0 & INTE, DEPCA_DATA);
996
997 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
998 depca_rx(dev);
999
1000 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1001 depca_tx(dev);
1002
1003 /* Any resources available? */
1004 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1005 netif_wake_queue(dev);
1006 }
1007
1008 /* Unmask the DEPCA board interrupts and turn off the LED */
1009 nicsr = (nicsr & ~IM & ~LED);
1010 outb(nicsr, DEPCA_NICSR);
1011
1012 spin_unlock(&lp->lock);
1013 return IRQ_HANDLED;
1014 }
1015
1016 /* Called with lp->lock held */
1017 static int depca_rx(struct net_device *dev)
1018 {
1019 struct depca_private *lp = (struct depca_private *) dev->priv;
1020 int i, entry;
1021 s32 status;
1022
1023 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1024 status = readl(&lp->rx_ring[entry].base) >> 16;
1025 if (status & R_STP) { /* Remember start of frame */
1026 lp->rx_old = entry;
1027 }
1028 if (status & R_ENP) { /* Valid frame status */
1029 if (status & R_ERR) { /* There was an error. */
1030 lp->stats.rx_errors++; /* Update the error stats. */
1031 if (status & R_FRAM)
1032 lp->stats.rx_frame_errors++;
1033 if (status & R_OFLO)
1034 lp->stats.rx_over_errors++;
1035 if (status & R_CRC)
1036 lp->stats.rx_crc_errors++;
1037 if (status & R_BUFF)
1038 lp->stats.rx_fifo_errors++;
1039 } else {
1040 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1041 struct sk_buff *skb;
1042
1043 skb = dev_alloc_skb(pkt_len + 2);
1044 if (skb != NULL) {
1045 unsigned char *buf;
1046 skb_reserve(skb, 2); /* 16 byte align the IP header */
1047 buf = skb_put(skb, pkt_len);
1048 skb->dev = dev;
1049 if (entry < lp->rx_old) { /* Wrapped buffer */
1050 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1051 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1052 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1053 } else { /* Linear buffer */
1054 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1055 }
1056
1057 /*
1058 ** Notify the upper protocol layers that there is another
1059 ** packet to handle
1060 */
1061 skb->protocol = eth_type_trans(skb, dev);
1062 netif_rx(skb);
1063
1064 /*
1065 ** Update stats
1066 */
1067 dev->last_rx = jiffies;
1068 lp->stats.rx_packets++;
1069 lp->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 lp->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 = (struct depca_private *) dev->priv;
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 lp->stats.tx_errors++;
1131 if (status & TMD3_RTRY)
1132 lp->stats.tx_aborted_errors++;
1133 if (status & TMD3_LCAR)
1134 lp->stats.tx_carrier_errors++;
1135 if (status & TMD3_LCOL)
1136 lp->stats.tx_window_errors++;
1137 if (status & TMD3_UFLO)
1138 lp->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 lp->stats.collisions++;
1146 } else {
1147 lp->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 = (struct depca_private *) dev->priv;
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 = (struct depca_private *) dev->priv;
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 = (struct depca_private *) dev->priv;
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 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1240 {
1241 struct depca_private *lp = (struct depca_private *) dev->priv;
1242
1243 /* Null body since there is no framing error counter */
1244
1245 return &lp->stats;
1246 }
1247
1248 /*
1249 ** Set or clear the multicast filter for this adaptor.
1250 */
1251 static void set_multicast_list(struct net_device *dev)
1252 {
1253 struct depca_private *lp = (struct depca_private *) dev->priv;
1254 u_long ioaddr = dev->base_addr;
1255
1256 if (dev) {
1257 netif_stop_queue(dev);
1258 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1259
1260 STOP_DEPCA; /* Temporarily stop the depca. */
1261 depca_init_ring(dev); /* Initialize the descriptor rings */
1262
1263 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1264 lp->init_block.mode |= PROM;
1265 } else {
1266 SetMulticastFilter(dev);
1267 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1268 }
1269
1270 LoadCSRs(dev); /* Reload CSR3 */
1271 InitRestartDepca(dev); /* Resume normal operation. */
1272 netif_start_queue(dev); /* Unlock the TX ring */
1273 }
1274 }
1275
1276 /*
1277 ** Calculate the hash code and update the logical address filter
1278 ** from a list of ethernet multicast addresses.
1279 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1280 ** LANCE calculates its hash codes big endian.
1281 */
1282 static void SetMulticastFilter(struct net_device *dev)
1283 {
1284 struct depca_private *lp = (struct depca_private *) dev->priv;
1285 struct dev_mc_list *dmi = dev->mc_list;
1286 char *addrs;
1287 int i, j, bit, byte;
1288 u16 hashcode;
1289 u32 crc;
1290
1291 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1292 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1293 lp->init_block.mcast_table[i] = (char) 0xff;
1294 }
1295 } else {
1296 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1297 lp->init_block.mcast_table[i] = 0;
1298 }
1299 /* Add multicast addresses */
1300 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1301 addrs = dmi->dmi_addr;
1302 dmi = dmi->next;
1303 if ((*addrs & 0x01) == 1) { /* multicast address? */
1304 crc = ether_crc(ETH_ALEN, addrs);
1305 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1306 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1307 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1308 }
1309
1310
1311 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1312 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1313 lp->init_block.mcast_table[byte] |= bit;
1314 }
1315 }
1316 }
1317
1318 return;
1319 }
1320
1321 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1322 {
1323 int status = 0;
1324
1325 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1326 status = -EBUSY;
1327 goto out;
1328 }
1329
1330 if (DevicePresent(ioaddr)) {
1331 status = -ENODEV;
1332 goto out_release;
1333 }
1334
1335 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1336 status = -ENOMEM;
1337 goto out_release;
1338 }
1339
1340 return 0;
1341
1342 out_release:
1343 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1344 out:
1345 return status;
1346 }
1347
1348 #ifdef CONFIG_MCA
1349 /*
1350 ** Microchannel bus I/O device probe
1351 */
1352 static int __init depca_mca_probe(struct device *device)
1353 {
1354 unsigned char pos[2];
1355 unsigned char where;
1356 unsigned long iobase, mem_start;
1357 int irq, err;
1358 struct mca_device *mdev = to_mca_device (device);
1359 struct net_device *dev;
1360 struct depca_private *lp;
1361
1362 /*
1363 ** Search for the adapter. If an address has been given, search
1364 ** specifically for the card at that address. Otherwise find the
1365 ** first card in the system.
1366 */
1367
1368 pos[0] = mca_device_read_stored_pos(mdev, 2);
1369 pos[1] = mca_device_read_stored_pos(mdev, 3);
1370
1371 /*
1372 ** IO of card is handled by bits 1 and 2 of pos0.
1373 **
1374 ** bit2 bit1 IO
1375 ** 0 0 0x2c00
1376 ** 0 1 0x2c10
1377 ** 1 0 0x2c20
1378 ** 1 1 0x2c30
1379 */
1380 where = (pos[0] & 6) >> 1;
1381 iobase = 0x2c00 + (0x10 * where);
1382
1383 /*
1384 ** Found the adapter we were looking for. Now start setting it up.
1385 **
1386 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1387 ** of pos1. Bits are as follows (from the ADF file):
1388 **
1389 ** Bits
1390 ** 3 2 1 0 IRQ
1391 ** --------------------
1392 ** 0 0 1 0 5
1393 ** 0 0 0 1 9
1394 ** 0 1 0 0 10
1395 ** 1 0 0 0 11
1396 */
1397 where = pos[1] & 0x0f;
1398 switch (where) {
1399 case 1:
1400 irq = 9;
1401 break;
1402 case 2:
1403 irq = 5;
1404 break;
1405 case 4:
1406 irq = 10;
1407 break;
1408 case 8:
1409 irq = 11;
1410 break;
1411 default:
1412 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1413 return -EINVAL;
1414 }
1415
1416 /*
1417 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1418 ** They are mapped as follows:
1419 **
1420 ** Bit
1421 ** 5 4 3 Memory Addresses
1422 ** 0 0 0 C0000-CFFFF (64K)
1423 ** 1 0 0 C8000-CFFFF (32K)
1424 ** 0 0 1 D0000-DFFFF (64K)
1425 ** 1 0 1 D8000-DFFFF (32K)
1426 ** 0 1 0 E0000-EFFFF (64K)
1427 ** 1 1 0 E8000-EFFFF (32K)
1428 */
1429 where = (pos[0] & 0x18) >> 3;
1430 mem_start = 0xc0000 + (where * 0x10000);
1431 if (pos[0] & 0x20) {
1432 mem_start += 0x8000;
1433 }
1434
1435 /* claim the slot */
1436 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1437 sizeof(mdev->name));
1438 mca_device_set_claim(mdev, 1);
1439
1440 /*
1441 ** Get everything allocated and initialized... (almost just
1442 ** like the ISA and EISA probes)
1443 */
1444 irq = mca_device_transform_irq(mdev, irq);
1445 iobase = mca_device_transform_ioport(mdev, iobase);
1446
1447 if ((err = depca_common_init (iobase, &dev)))
1448 goto out_unclaim;
1449
1450 dev->irq = irq;
1451 dev->base_addr = iobase;
1452 lp = dev->priv;
1453 lp->depca_bus = DEPCA_BUS_MCA;
1454 lp->adapter = depca_mca_adapter_type[mdev->index];
1455 lp->mem_start = mem_start;
1456
1457 if ((err = depca_hw_init(dev, device)))
1458 goto out_free;
1459
1460 return 0;
1461
1462 out_free:
1463 free_netdev (dev);
1464 release_region (iobase, DEPCA_TOTAL_SIZE);
1465 out_unclaim:
1466 mca_device_set_claim(mdev, 0);
1467
1468 return err;
1469 }
1470 #endif
1471
1472 /*
1473 ** ISA bus I/O device probe
1474 */
1475
1476 static void __init depca_platform_probe (void)
1477 {
1478 int i;
1479 struct platform_device *pldev;
1480
1481 for (i = 0; depca_io_ports[i].iobase; i++) {
1482 depca_io_ports[i].device = NULL;
1483
1484 /* if an address has been specified on the command
1485 * line, use it (if valid) */
1486 if (io && io != depca_io_ports[i].iobase)
1487 continue;
1488
1489 pldev = platform_device_alloc(depca_string, i);
1490 if (!pldev)
1491 continue;
1492
1493 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1494 depca_io_ports[i].device = pldev;
1495
1496 if (platform_device_add(pldev)) {
1497 platform_device_put(pldev);
1498 depca_io_ports[i].device = NULL;
1499 continue;
1500 }
1501
1502 if (!pldev->dev.driver) {
1503 /* The driver was not bound to this device, there was
1504 * no hardware at this address. Unregister it, as the
1505 * release fuction will take care of freeing the
1506 * allocated structure */
1507
1508 depca_io_ports[i].device = NULL;
1509 pldev->dev.platform_data = NULL;
1510 platform_device_unregister (pldev);
1511 }
1512 }
1513 }
1514
1515 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1516 {
1517 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1518 enum depca_type adapter = unknown;
1519 int i;
1520
1521 for (i = 0; mem_base[i]; i++) {
1522 *mem_start = mem ? mem : mem_base[i];
1523 adapter = DepcaSignature (adapter_name, *mem_start);
1524 if (adapter != unknown)
1525 break;
1526 }
1527
1528 return adapter;
1529 }
1530
1531 static int __init depca_isa_probe (struct platform_device *device)
1532 {
1533 struct net_device *dev;
1534 struct depca_private *lp;
1535 u_long ioaddr, mem_start = 0;
1536 enum depca_type adapter = unknown;
1537 int status = 0;
1538
1539 ioaddr = (u_long) device->dev.platform_data;
1540
1541 if ((status = depca_common_init (ioaddr, &dev)))
1542 goto out;
1543
1544 adapter = depca_shmem_probe (&mem_start);
1545
1546 if (adapter == unknown) {
1547 status = -ENODEV;
1548 goto out_free;
1549 }
1550
1551 dev->base_addr = ioaddr;
1552 dev->irq = irq; /* Use whatever value the user gave
1553 * us, and 0 if he didn't. */
1554 lp = dev->priv;
1555 lp->depca_bus = DEPCA_BUS_ISA;
1556 lp->adapter = adapter;
1557 lp->mem_start = mem_start;
1558
1559 if ((status = depca_hw_init(dev, &device->dev)))
1560 goto out_free;
1561
1562 return 0;
1563
1564 out_free:
1565 free_netdev (dev);
1566 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1567 out:
1568 return status;
1569 }
1570
1571 /*
1572 ** EISA callbacks from sysfs.
1573 */
1574
1575 #ifdef CONFIG_EISA
1576 static int __init depca_eisa_probe (struct device *device)
1577 {
1578 struct eisa_device *edev;
1579 struct net_device *dev;
1580 struct depca_private *lp;
1581 u_long ioaddr, mem_start;
1582 int status = 0;
1583
1584 edev = to_eisa_device (device);
1585 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1586
1587 if ((status = depca_common_init (ioaddr, &dev)))
1588 goto out;
1589
1590 /* It would have been nice to get card configuration from the
1591 * card. Unfortunately, this register is write-only (shares
1592 * it's address with the ethernet prom)... As we don't parse
1593 * the EISA configuration structures (yet... :-), just rely on
1594 * the ISA probing to sort it out... */
1595
1596 depca_shmem_probe (&mem_start);
1597
1598 dev->base_addr = ioaddr;
1599 dev->irq = irq;
1600 lp = dev->priv;
1601 lp->depca_bus = DEPCA_BUS_EISA;
1602 lp->adapter = edev->id.driver_data;
1603 lp->mem_start = mem_start;
1604
1605 if ((status = depca_hw_init(dev, device)))
1606 goto out_free;
1607
1608 return 0;
1609
1610 out_free:
1611 free_netdev (dev);
1612 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1613 out:
1614 return status;
1615 }
1616 #endif
1617
1618 static int __devexit depca_device_remove (struct device *device)
1619 {
1620 struct net_device *dev;
1621 struct depca_private *lp;
1622 int bus;
1623
1624 dev = device->driver_data;
1625 lp = dev->priv;
1626
1627 unregister_netdev (dev);
1628 iounmap (lp->sh_mem);
1629 release_mem_region (lp->mem_start, lp->mem_len);
1630 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1631 bus = lp->depca_bus;
1632 free_netdev (dev);
1633
1634 return 0;
1635 }
1636
1637 /*
1638 ** Look for a particular board name in the on-board Remote Diagnostics
1639 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1640 ** base address.
1641 */
1642 static int __init DepcaSignature(char *name, u_long base_addr)
1643 {
1644 u_int i, j, k;
1645 void __iomem *ptr;
1646 char tmpstr[16];
1647 u_long prom_addr = base_addr + 0xc000;
1648 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1649
1650 /* Can't reserve the prom region, it is already marked as
1651 * used, at least on x86. Instead, reserve a memory region a
1652 * board would certainly use. If it works, go ahead. If not,
1653 * run like hell... */
1654
1655 if (!request_mem_region (mem_addr, 16, depca_string))
1656 return unknown;
1657
1658 /* Copy the first 16 bytes of ROM */
1659
1660 ptr = ioremap(prom_addr, 16);
1661 if (ptr == NULL) {
1662 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1663 return unknown;
1664 }
1665 for (i = 0; i < 16; i++) {
1666 tmpstr[i] = readb(ptr + i);
1667 }
1668 iounmap(ptr);
1669
1670 release_mem_region (mem_addr, 16);
1671
1672 /* Check if PROM contains a valid string */
1673 for (i = 0; *depca_signature[i] != '\0'; i++) {
1674 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1675 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1676 k++;
1677 } else { /* lost signature; begin search again */
1678 k = 0;
1679 }
1680 }
1681 if (k == strlen(depca_signature[i]))
1682 break;
1683 }
1684
1685 /* Check if name string is valid, provided there's no PROM */
1686 if (name && *name && (i == unknown)) {
1687 for (i = 0; *depca_signature[i] != '\0'; i++) {
1688 if (strcmp(name, depca_signature[i]) == 0)
1689 break;
1690 }
1691 }
1692
1693 return i;
1694 }
1695
1696 /*
1697 ** Look for a special sequence in the Ethernet station address PROM that
1698 ** is common across all DEPCA products. Note that the original DEPCA needs
1699 ** its ROM address counter to be initialized and enabled. Only enable
1700 ** if the first address octet is a 0x08 - this minimises the chances of
1701 ** messing around with some other hardware, but it assumes that this DEPCA
1702 ** card initialized itself correctly.
1703 **
1704 ** Search the Ethernet address ROM for the signature. Since the ROM address
1705 ** counter can start at an arbitrary point, the search must include the entire
1706 ** probe sequence length plus the (length_of_the_signature - 1).
1707 ** Stop the search IMMEDIATELY after the signature is found so that the
1708 ** PROM address counter is correctly positioned at the start of the
1709 ** ethernet address for later read out.
1710 */
1711 static int __init DevicePresent(u_long ioaddr)
1712 {
1713 union {
1714 struct {
1715 u32 a;
1716 u32 b;
1717 } llsig;
1718 char Sig[sizeof(u32) << 1];
1719 }
1720 dev;
1721 short sigLength = 0;
1722 s8 data;
1723 s16 nicsr;
1724 int i, j, status = 0;
1725
1726 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1727 data = inb(DEPCA_PROM); /* read data */
1728
1729 if (data == 0x08) { /* Enable counter on DEPCA */
1730 nicsr = inb(DEPCA_NICSR);
1731 nicsr |= AAC;
1732 outb(nicsr, DEPCA_NICSR);
1733 }
1734
1735 dev.llsig.a = ETH_PROM_SIG;
1736 dev.llsig.b = ETH_PROM_SIG;
1737 sigLength = sizeof(u32) << 1;
1738
1739 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1740 data = inb(DEPCA_PROM);
1741 if (dev.Sig[j] == data) { /* track signature */
1742 j++;
1743 } else { /* lost signature; begin search again */
1744 if (data == dev.Sig[0]) { /* rare case.... */
1745 j = 1;
1746 } else {
1747 j = 0;
1748 }
1749 }
1750 }
1751
1752 if (j != sigLength) {
1753 status = -ENODEV; /* search failed */
1754 }
1755
1756 return status;
1757 }
1758
1759 /*
1760 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1761 ** reason: access the upper half of the PROM with x=0; access the lower half
1762 ** with x=1.
1763 */
1764 static int __init get_hw_addr(struct net_device *dev)
1765 {
1766 u_long ioaddr = dev->base_addr;
1767 struct depca_private *lp = dev->priv;
1768 int i, k, tmp, status = 0;
1769 u_short j, x, chksum;
1770
1771 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1772
1773 for (i = 0, k = 0, j = 0; j < 3; j++) {
1774 k <<= 1;
1775 if (k > 0xffff)
1776 k -= 0xffff;
1777
1778 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1779 dev->dev_addr[i++] = (u_char) tmp;
1780 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1781 dev->dev_addr[i++] = (u_char) tmp;
1782
1783 if (k > 0xffff)
1784 k -= 0xffff;
1785 }
1786 if (k == 0xffff)
1787 k = 0;
1788
1789 chksum = (u_char) inb(DEPCA_PROM + x);
1790 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1791 if (k != chksum)
1792 status = -1;
1793
1794 return status;
1795 }
1796
1797 /*
1798 ** Load a packet into the shared memory
1799 */
1800 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1801 {
1802 struct depca_private *lp = (struct depca_private *) dev->priv;
1803 int i, entry, end, len, status = 0;
1804
1805 entry = lp->tx_new; /* Ring around buffer number. */
1806 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1807 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1808 /*
1809 ** Caution: the write order is important here... don't set up the
1810 ** ownership rights until all the other information is in place.
1811 */
1812 if (end < entry) { /* wrapped buffer */
1813 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1814 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1815 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1816 } else { /* linear buffer */
1817 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1818 }
1819
1820 /* set up the buffer descriptors */
1821 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1822 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1823 /* clean out flags */
1824 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1825 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1826 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1827 len -= TX_BUFF_SZ;
1828 }
1829 /* clean out flags */
1830 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1831 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1832 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1833
1834 /* start of packet */
1835 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1836 /* end of packet */
1837 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1838
1839 for (i = end; i != entry; --i) {
1840 /* ownership of packet */
1841 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1842 if (i == 0)
1843 i = lp->txRingMask + 1;
1844 }
1845 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1846
1847 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1848 } else {
1849 status = -1;
1850 }
1851
1852 return status;
1853 }
1854
1855 static void depca_dbg_open(struct net_device *dev)
1856 {
1857 struct depca_private *lp = (struct depca_private *) dev->priv;
1858 u_long ioaddr = dev->base_addr;
1859 struct depca_init *p = &lp->init_block;
1860 int i;
1861
1862 if (depca_debug > 1) {
1863 /* Do not copy the shadow init block into shared memory */
1864 /* Debugging should not affect normal operation! */
1865 /* The shadow init block will get copied across during InitRestartDepca */
1866 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1867 printk("Descriptor head addresses (CPU):\n");
1868 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1869 printk("Descriptor addresses (CPU):\nRX: ");
1870 for (i = 0; i < lp->rxRingMask; i++) {
1871 if (i < 3) {
1872 printk("%p ", &lp->rx_ring[i].base);
1873 }
1874 }
1875 printk("...%p\n", &lp->rx_ring[i].base);
1876 printk("TX: ");
1877 for (i = 0; i < lp->txRingMask; i++) {
1878 if (i < 3) {
1879 printk("%p ", &lp->tx_ring[i].base);
1880 }
1881 }
1882 printk("...%p\n", &lp->tx_ring[i].base);
1883 printk("\nDescriptor buffers (Device):\nRX: ");
1884 for (i = 0; i < lp->rxRingMask; i++) {
1885 if (i < 3) {
1886 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1887 }
1888 }
1889 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1890 printk("TX: ");
1891 for (i = 0; i < lp->txRingMask; i++) {
1892 if (i < 3) {
1893 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1894 }
1895 }
1896 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1897 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1898 printk(" mode: 0x%4.4x\n", p->mode);
1899 printk(" physical address: ");
1900 for (i = 0; i < ETH_ALEN - 1; i++) {
1901 printk("%2.2x:", p->phys_addr[i]);
1902 }
1903 printk("%2.2x\n", p->phys_addr[i]);
1904 printk(" multicast hash table: ");
1905 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1906 printk("%2.2x:", p->mcast_table[i]);
1907 }
1908 printk("%2.2x\n", p->mcast_table[i]);
1909 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1910 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1911 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1912 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1913 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1914 outw(CSR2, DEPCA_ADDR);
1915 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1916 outw(CSR1, DEPCA_ADDR);
1917 printk("%4.4x\n", inw(DEPCA_DATA));
1918 outw(CSR3, DEPCA_ADDR);
1919 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1920 }
1921
1922 return;
1923 }
1924
1925 /*
1926 ** Perform IOCTL call functions here. Some are privileged operations and the
1927 ** effective uid is checked in those cases.
1928 ** All multicast IOCTLs will not work here and are for testing purposes only.
1929 */
1930 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1931 {
1932 struct depca_private *lp = (struct depca_private *) dev->priv;
1933 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1934 int i, status = 0;
1935 u_long ioaddr = dev->base_addr;
1936 union {
1937 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1938 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1939 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1940 } tmp;
1941 unsigned long flags;
1942 void *buf;
1943
1944 switch (ioc->cmd) {
1945 case DEPCA_GET_HWADDR: /* Get the hardware address */
1946 for (i = 0; i < ETH_ALEN; i++) {
1947 tmp.addr[i] = dev->dev_addr[i];
1948 }
1949 ioc->len = ETH_ALEN;
1950 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1951 return -EFAULT;
1952 break;
1953
1954 case DEPCA_SET_HWADDR: /* Set the hardware address */
1955 if (!capable(CAP_NET_ADMIN))
1956 return -EPERM;
1957 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1958 return -EFAULT;
1959 for (i = 0; i < ETH_ALEN; i++) {
1960 dev->dev_addr[i] = tmp.addr[i];
1961 }
1962 netif_stop_queue(dev);
1963 while (lp->tx_old != lp->tx_new)
1964 cpu_relax(); /* Wait for the ring to empty */
1965
1966 STOP_DEPCA; /* Temporarily stop the depca. */
1967 depca_init_ring(dev); /* Initialize the descriptor rings */
1968 LoadCSRs(dev); /* Reload CSR3 */
1969 InitRestartDepca(dev); /* Resume normal operation. */
1970 netif_start_queue(dev); /* Unlock the TX ring */
1971 break;
1972
1973 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1974 if (!capable(CAP_NET_ADMIN))
1975 return -EPERM;
1976 netif_stop_queue(dev);
1977 while (lp->tx_old != lp->tx_new)
1978 cpu_relax(); /* Wait for the ring to empty */
1979
1980 STOP_DEPCA; /* Temporarily stop the depca. */
1981 depca_init_ring(dev); /* Initialize the descriptor rings */
1982 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1983
1984 LoadCSRs(dev); /* Reload CSR3 */
1985 InitRestartDepca(dev); /* Resume normal operation. */
1986 netif_start_queue(dev); /* Unlock the TX ring */
1987 break;
1988
1989 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1990 if (!capable(CAP_NET_ADMIN))
1991 return -EPERM;
1992 netif_stop_queue(dev);
1993 while (lp->tx_old != lp->tx_new)
1994 cpu_relax(); /* Wait for the ring to empty */
1995
1996 STOP_DEPCA; /* Temporarily stop the depca. */
1997 depca_init_ring(dev); /* Initialize the descriptor rings */
1998 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1999
2000 LoadCSRs(dev); /* Reload CSR3 */
2001 InitRestartDepca(dev); /* Resume normal operation. */
2002 netif_start_queue(dev); /* Unlock the TX ring */
2003 break;
2004
2005 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2006 if(!capable(CAP_NET_ADMIN))
2007 return -EPERM;
2008 printk("%s: Boo!\n", dev->name);
2009 break;
2010
2011 case DEPCA_GET_MCA: /* Get the multicast address table */
2012 ioc->len = (HASH_TABLE_LEN >> 3);
2013 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2014 return -EFAULT;
2015 break;
2016
2017 case DEPCA_SET_MCA: /* Set a multicast address */
2018 if (!capable(CAP_NET_ADMIN))
2019 return -EPERM;
2020 if (ioc->len >= HASH_TABLE_LEN)
2021 return -EINVAL;
2022 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2023 return -EFAULT;
2024 set_multicast_list(dev);
2025 break;
2026
2027 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2028 if (!capable(CAP_NET_ADMIN))
2029 return -EPERM;
2030 set_multicast_list(dev);
2031 break;
2032
2033 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2034 if (!capable(CAP_NET_ADMIN))
2035 return -EPERM;
2036 set_multicast_list(dev);
2037 break;
2038
2039 case DEPCA_GET_STATS: /* Get the driver statistics */
2040 ioc->len = sizeof(lp->pktStats);
2041 buf = kmalloc(ioc->len, GFP_KERNEL);
2042 if(!buf)
2043 return -ENOMEM;
2044 spin_lock_irqsave(&lp->lock, flags);
2045 memcpy(buf, &lp->pktStats, ioc->len);
2046 spin_unlock_irqrestore(&lp->lock, flags);
2047 if (copy_to_user(ioc->data, buf, ioc->len))
2048 status = -EFAULT;
2049 kfree(buf);
2050 break;
2051
2052 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2053 if (!capable(CAP_NET_ADMIN))
2054 return -EPERM;
2055 spin_lock_irqsave(&lp->lock, flags);
2056 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2057 spin_unlock_irqrestore(&lp->lock, flags);
2058 break;
2059
2060 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2061 i = 0;
2062 tmp.sval[i++] = inw(DEPCA_NICSR);
2063 outw(CSR0, DEPCA_ADDR); /* status register */
2064 tmp.sval[i++] = inw(DEPCA_DATA);
2065 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2066 ioc->len = i + sizeof(struct depca_init);
2067 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2068 return -EFAULT;
2069 break;
2070
2071 default:
2072 return -EOPNOTSUPP;
2073 }
2074
2075 return status;
2076 }
2077
2078 static int __init depca_module_init (void)
2079 {
2080 int err = 0;
2081
2082 #ifdef CONFIG_MCA
2083 err = mca_register_driver (&depca_mca_driver);
2084 #endif
2085 #ifdef CONFIG_EISA
2086 err |= eisa_driver_register (&depca_eisa_driver);
2087 #endif
2088 err |= platform_driver_register (&depca_isa_driver);
2089 depca_platform_probe ();
2090
2091 return err;
2092 }
2093
2094 static void __exit depca_module_exit (void)
2095 {
2096 int i;
2097 #ifdef CONFIG_MCA
2098 mca_unregister_driver (&depca_mca_driver);
2099 #endif
2100 #ifdef CONFIG_EISA
2101 eisa_driver_unregister (&depca_eisa_driver);
2102 #endif
2103 platform_driver_unregister (&depca_isa_driver);
2104
2105 for (i = 0; depca_io_ports[i].iobase; i++) {
2106 if (depca_io_ports[i].device) {
2107 depca_io_ports[i].device->dev.platform_data = NULL;
2108 platform_device_unregister (depca_io_ports[i].device);
2109 depca_io_ports[i].device = NULL;
2110 }
2111 }
2112 }
2113
2114 module_init (depca_module_init);
2115 module_exit (depca_module_exit);
Linux kernel - Deliverables
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