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[PATCH] Use of uninitialized variable in drivers/net/depca.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / depca.c
blob0941d40f046f326b84d68a84ca351398739d503a
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->len < ETH_ZLEN) {
942 skb = skb_padto(skb, ETH_ZLEN);
943 if (skb == NULL)
944 goto out;
945 }
946
947 netif_stop_queue(dev);
948
949 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950 status = load_packet(dev, skb);
951
952 if (!status) {
953 /* Trigger an immediate send demand. */
954 outw(CSR0, DEPCA_ADDR);
955 outw(INEA | TDMD, DEPCA_DATA);
956
957 dev->trans_start = jiffies;
958 dev_kfree_skb(skb);
959 }
960 if (TX_BUFFS_AVAIL)
961 netif_start_queue(dev);
962 } else
963 status = -1;
964
965 out:
966 return status;
967 }
968
969 /*
970 ** The DEPCA interrupt handler.
971 */
972 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
973 {
974 struct net_device *dev = dev_id;
975 struct depca_private *lp;
976 s16 csr0, nicsr;
977 u_long ioaddr;
978
979 if (dev == NULL) {
980 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
981 return IRQ_NONE;
982 }
983
984 lp = (struct depca_private *) dev->priv;
985 ioaddr = dev->base_addr;
986
987 spin_lock(&lp->lock);
988
989 /* mask the DEPCA board interrupts and turn on the LED */
990 nicsr = inb(DEPCA_NICSR);
991 nicsr |= (IM | LED);
992 outb(nicsr, DEPCA_NICSR);
993
994 outw(CSR0, DEPCA_ADDR);
995 csr0 = inw(DEPCA_DATA);
996
997 /* Acknowledge all of the current interrupt sources ASAP. */
998 outw(csr0 & INTE, DEPCA_DATA);
999
1000 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1001 depca_rx(dev);
1002
1003 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1004 depca_tx(dev);
1005
1006 /* Any resources available? */
1007 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1008 netif_wake_queue(dev);
1009 }
1010
1011 /* Unmask the DEPCA board interrupts and turn off the LED */
1012 nicsr = (nicsr & ~IM & ~LED);
1013 outb(nicsr, DEPCA_NICSR);
1014
1015 spin_unlock(&lp->lock);
1016 return IRQ_HANDLED;
1017 }
1018
1019 /* Called with lp->lock held */
1020 static int depca_rx(struct net_device *dev)
1021 {
1022 struct depca_private *lp = (struct depca_private *) dev->priv;
1023 int i, entry;
1024 s32 status;
1025
1026 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1027 status = readl(&lp->rx_ring[entry].base) >> 16;
1028 if (status & R_STP) { /* Remember start of frame */
1029 lp->rx_old = entry;
1030 }
1031 if (status & R_ENP) { /* Valid frame status */
1032 if (status & R_ERR) { /* There was an error. */
1033 lp->stats.rx_errors++; /* Update the error stats. */
1034 if (status & R_FRAM)
1035 lp->stats.rx_frame_errors++;
1036 if (status & R_OFLO)
1037 lp->stats.rx_over_errors++;
1038 if (status & R_CRC)
1039 lp->stats.rx_crc_errors++;
1040 if (status & R_BUFF)
1041 lp->stats.rx_fifo_errors++;
1042 } else {
1043 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1044 struct sk_buff *skb;
1045
1046 skb = dev_alloc_skb(pkt_len + 2);
1047 if (skb != NULL) {
1048 unsigned char *buf;
1049 skb_reserve(skb, 2); /* 16 byte align the IP header */
1050 buf = skb_put(skb, pkt_len);
1051 skb->dev = dev;
1052 if (entry < lp->rx_old) { /* Wrapped buffer */
1053 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1054 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1055 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1056 } else { /* Linear buffer */
1057 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1058 }
1059
1060 /*
1061 ** Notify the upper protocol layers that there is another
1062 ** packet to handle
1063 */
1064 skb->protocol = eth_type_trans(skb, dev);
1065 netif_rx(skb);
1066
1067 /*
1068 ** Update stats
1069 */
1070 dev->last_rx = jiffies;
1071 lp->stats.rx_packets++;
1072 lp->stats.rx_bytes += pkt_len;
1073 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1074 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1075 lp->pktStats.bins[i]++;
1076 i = DEPCA_PKT_STAT_SZ;
1077 }
1078 }
1079 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1080 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1081 lp->pktStats.broadcast++;
1082 } else {
1083 lp->pktStats.multicast++;
1084 }
1085 } 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])) {
1086 lp->pktStats.unicast++;
1087 }
1088
1089 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1090 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1091 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1092 }
1093 } else {
1094 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1095 lp->stats.rx_dropped++; /* Really, deferred. */
1096 break;
1097 }
1098 }
1099 /* Change buffer ownership for this last frame, back to the adapter */
1100 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1101 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1102 }
1103 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1104 }
1105
1106 /*
1107 ** Update entry information
1108 */
1109 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1110 }
1111
1112 return 0;
1113 }
1114
1115 /*
1116 ** Buffer sent - check for buffer errors.
1117 ** Called with lp->lock held
1118 */
1119 static int depca_tx(struct net_device *dev)
1120 {
1121 struct depca_private *lp = (struct depca_private *) dev->priv;
1122 int entry;
1123 s32 status;
1124 u_long ioaddr = dev->base_addr;
1125
1126 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1127 status = readl(&lp->tx_ring[entry].base) >> 16;
1128
1129 if (status < 0) { /* Packet not yet sent! */
1130 break;
1131 } else if (status & T_ERR) { /* An error occurred. */
1132 status = readl(&lp->tx_ring[entry].misc);
1133 lp->stats.tx_errors++;
1134 if (status & TMD3_RTRY)
1135 lp->stats.tx_aborted_errors++;
1136 if (status & TMD3_LCAR)
1137 lp->stats.tx_carrier_errors++;
1138 if (status & TMD3_LCOL)
1139 lp->stats.tx_window_errors++;
1140 if (status & TMD3_UFLO)
1141 lp->stats.tx_fifo_errors++;
1142 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1143 /* Trigger an immediate send demand. */
1144 outw(CSR0, DEPCA_ADDR);
1145 outw(INEA | TDMD, DEPCA_DATA);
1146 }
1147 } else if (status & (T_MORE | T_ONE)) {
1148 lp->stats.collisions++;
1149 } else {
1150 lp->stats.tx_packets++;
1151 }
1152
1153 /* Update all the pointers */
1154 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1155 }
1156
1157 return 0;
1158 }
1159
1160 static int depca_close(struct net_device *dev)
1161 {
1162 struct depca_private *lp = (struct depca_private *) dev->priv;
1163 s16 nicsr;
1164 u_long ioaddr = dev->base_addr;
1165
1166 netif_stop_queue(dev);
1167
1168 outw(CSR0, DEPCA_ADDR);
1169
1170 if (depca_debug > 1) {
1171 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1172 }
1173
1174 /*
1175 ** We stop the DEPCA here -- it occasionally polls
1176 ** memory if we don't.
1177 */
1178 outw(STOP, DEPCA_DATA);
1179
1180 /*
1181 ** Give back the ROM in case the user wants to go to DOS
1182 */
1183 if (lp->adapter != DEPCA) {
1184 nicsr = inb(DEPCA_NICSR);
1185 nicsr &= ~SHE;
1186 outb(nicsr, DEPCA_NICSR);
1187 }
1188
1189 /*
1190 ** Free the associated irq
1191 */
1192 free_irq(dev->irq, dev);
1193 return 0;
1194 }
1195
1196 static void LoadCSRs(struct net_device *dev)
1197 {
1198 struct depca_private *lp = (struct depca_private *) dev->priv;
1199 u_long ioaddr = dev->base_addr;
1200
1201 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1202 outw((u16) lp->device_ram_start, DEPCA_DATA);
1203 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1204 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1205 outw(CSR3, DEPCA_ADDR); /* ALE control */
1206 outw(ACON, DEPCA_DATA);
1207
1208 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1209
1210 return;
1211 }
1212
1213 static int InitRestartDepca(struct net_device *dev)
1214 {
1215 struct depca_private *lp = (struct depca_private *) dev->priv;
1216 u_long ioaddr = dev->base_addr;
1217 int i, status = 0;
1218
1219 /* Copy the shadow init_block to shared memory */
1220 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1221
1222 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1223 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1224
1225 /* wait for lance to complete initialisation */
1226 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1227
1228 if (i != 100) {
1229 /* clear IDON by writing a "1", enable interrupts and start lance */
1230 outw(IDON | INEA | STRT, DEPCA_DATA);
1231 if (depca_debug > 2) {
1232 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1233 }
1234 } else {
1235 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1236 status = -1;
1237 }
1238
1239 return status;
1240 }
1241
1242 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1243 {
1244 struct depca_private *lp = (struct depca_private *) dev->priv;
1245
1246 /* Null body since there is no framing error counter */
1247
1248 return &lp->stats;
1249 }
1250
1251 /*
1252 ** Set or clear the multicast filter for this adaptor.
1253 */
1254 static void set_multicast_list(struct net_device *dev)
1255 {
1256 struct depca_private *lp = (struct depca_private *) dev->priv;
1257 u_long ioaddr = dev->base_addr;
1258
1259 if (dev) {
1260 netif_stop_queue(dev);
1261 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1262
1263 STOP_DEPCA; /* Temporarily stop the depca. */
1264 depca_init_ring(dev); /* Initialize the descriptor rings */
1265
1266 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1267 lp->init_block.mode |= PROM;
1268 } else {
1269 SetMulticastFilter(dev);
1270 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1271 }
1272
1273 LoadCSRs(dev); /* Reload CSR3 */
1274 InitRestartDepca(dev); /* Resume normal operation. */
1275 netif_start_queue(dev); /* Unlock the TX ring */
1276 }
1277 }
1278
1279 /*
1280 ** Calculate the hash code and update the logical address filter
1281 ** from a list of ethernet multicast addresses.
1282 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1283 ** LANCE calculates its hash codes big endian.
1284 */
1285 static void SetMulticastFilter(struct net_device *dev)
1286 {
1287 struct depca_private *lp = (struct depca_private *) dev->priv;
1288 struct dev_mc_list *dmi = dev->mc_list;
1289 char *addrs;
1290 int i, j, bit, byte;
1291 u16 hashcode;
1292 u32 crc;
1293
1294 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1295 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1296 lp->init_block.mcast_table[i] = (char) 0xff;
1297 }
1298 } else {
1299 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1300 lp->init_block.mcast_table[i] = 0;
1301 }
1302 /* Add multicast addresses */
1303 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1304 addrs = dmi->dmi_addr;
1305 dmi = dmi->next;
1306 if ((*addrs & 0x01) == 1) { /* multicast address? */
1307 crc = ether_crc(ETH_ALEN, addrs);
1308 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1309 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1310 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1311 }
1312
1313
1314 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1315 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1316 lp->init_block.mcast_table[byte] |= bit;
1317 }
1318 }
1319 }
1320
1321 return;
1322 }
1323
1324 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1325 {
1326 int status = 0;
1327
1328 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1329 status = -EBUSY;
1330 goto out;
1331 }
1332
1333 if (DevicePresent(ioaddr)) {
1334 status = -ENODEV;
1335 goto out_release;
1336 }
1337
1338 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1339 status = -ENOMEM;
1340 goto out_release;
1341 }
1342
1343 return 0;
1344
1345 out_release:
1346 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1347 out:
1348 return status;
1349 }
1350
1351 #ifdef CONFIG_MCA
1352 /*
1353 ** Microchannel bus I/O device probe
1354 */
1355 static int __init depca_mca_probe(struct device *device)
1356 {
1357 unsigned char pos[2];
1358 unsigned char where;
1359 unsigned long iobase, mem_start;
1360 int irq, err;
1361 struct mca_device *mdev = to_mca_device (device);
1362 struct net_device *dev;
1363 struct depca_private *lp;
1364
1365 /*
1366 ** Search for the adapter. If an address has been given, search
1367 ** specifically for the card at that address. Otherwise find the
1368 ** first card in the system.
1369 */
1370
1371 pos[0] = mca_device_read_stored_pos(mdev, 2);
1372 pos[1] = mca_device_read_stored_pos(mdev, 3);
1373
1374 /*
1375 ** IO of card is handled by bits 1 and 2 of pos0.
1376 **
1377 ** bit2 bit1 IO
1378 ** 0 0 0x2c00
1379 ** 0 1 0x2c10
1380 ** 1 0 0x2c20
1381 ** 1 1 0x2c30
1382 */
1383 where = (pos[0] & 6) >> 1;
1384 iobase = 0x2c00 + (0x10 * where);
1385
1386 /*
1387 ** Found the adapter we were looking for. Now start setting it up.
1388 **
1389 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1390 ** of pos1. Bits are as follows (from the ADF file):
1391 **
1392 ** Bits
1393 ** 3 2 1 0 IRQ
1394 ** --------------------
1395 ** 0 0 1 0 5
1396 ** 0 0 0 1 9
1397 ** 0 1 0 0 10
1398 ** 1 0 0 0 11
1399 */
1400 where = pos[1] & 0x0f;
1401 switch (where) {
1402 case 1:
1403 irq = 9;
1404 break;
1405 case 2:
1406 irq = 5;
1407 break;
1408 case 4:
1409 irq = 10;
1410 break;
1411 case 8:
1412 irq = 11;
1413 break;
1414 default:
1415 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1416 return -EINVAL;
1417 }
1418
1419 /*
1420 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1421 ** They are mapped as follows:
1422 **
1423 ** Bit
1424 ** 5 4 3 Memory Addresses
1425 ** 0 0 0 C0000-CFFFF (64K)
1426 ** 1 0 0 C8000-CFFFF (32K)
1427 ** 0 0 1 D0000-DFFFF (64K)
1428 ** 1 0 1 D8000-DFFFF (32K)
1429 ** 0 1 0 E0000-EFFFF (64K)
1430 ** 1 1 0 E8000-EFFFF (32K)
1431 */
1432 where = (pos[0] & 0x18) >> 3;
1433 mem_start = 0xc0000 + (where * 0x10000);
1434 if (pos[0] & 0x20) {
1435 mem_start += 0x8000;
1436 }
1437
1438 /* claim the slot */
1439 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1440 sizeof(mdev->name));
1441 mca_device_set_claim(mdev, 1);
1442
1443 /*
1444 ** Get everything allocated and initialized... (almost just
1445 ** like the ISA and EISA probes)
1446 */
1447 irq = mca_device_transform_irq(mdev, irq);
1448 iobase = mca_device_transform_ioport(mdev, iobase);
1449
1450 if ((err = depca_common_init (iobase, &dev)))
1451 goto out_unclaim;
1452
1453 dev->irq = irq;
1454 dev->base_addr = iobase;
1455 lp = dev->priv;
1456 lp->depca_bus = DEPCA_BUS_MCA;
1457 lp->adapter = depca_mca_adapter_type[mdev->index];
1458 lp->mem_start = mem_start;
1459
1460 if ((err = depca_hw_init(dev, device)))
1461 goto out_free;
1462
1463 return 0;
1464
1465 out_free:
1466 free_netdev (dev);
1467 release_region (iobase, DEPCA_TOTAL_SIZE);
1468 out_unclaim:
1469 mca_device_set_claim(mdev, 0);
1470
1471 return err;
1472 }
1473 #endif
1474
1475 /*
1476 ** ISA bus I/O device probe
1477 */
1478
1479 static void __init depca_platform_probe (void)
1480 {
1481 int i;
1482 struct platform_device *pldev;
1483
1484 for (i = 0; depca_io_ports[i].iobase; i++) {
1485 depca_io_ports[i].device = NULL;
1486
1487 /* if an address has been specified on the command
1488 * line, use it (if valid) */
1489 if (io && io != depca_io_ports[i].iobase)
1490 continue;
1491
1492 pldev = platform_device_alloc(depca_string, i);
1493 if (!pldev)
1494 continue;
1495
1496 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1497 depca_io_ports[i].device = pldev;
1498
1499 if (platform_device_add(pldev)) {
1500 platform_device_put(pldev);
1501 depca_io_ports[i].device = NULL;
1502 continue;
1503 }
1504
1505 if (!pldev->dev.driver) {
1506 /* The driver was not bound to this device, there was
1507 * no hardware at this address. Unregister it, as the
1508 * release fuction will take care of freeing the
1509 * allocated structure */
1510
1511 depca_io_ports[i].device = NULL;
1512 pldev->dev.platform_data = NULL;
1513 platform_device_unregister (pldev);
1514 }
1515 }
1516 }
1517
1518 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1519 {
1520 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1521 enum depca_type adapter = unknown;
1522 int i;
1523
1524 for (i = 0; mem_base[i]; i++) {
1525 *mem_start = mem ? mem : mem_base[i];
1526 adapter = DepcaSignature (adapter_name, *mem_start);
1527 if (adapter != unknown)
1528 break;
1529 }
1530
1531 return adapter;
1532 }
1533
1534 static int __init depca_isa_probe (struct platform_device *device)
1535 {
1536 struct net_device *dev;
1537 struct depca_private *lp;
1538 u_long ioaddr, mem_start = 0;
1539 enum depca_type adapter = unknown;
1540 int status = 0;
1541
1542 ioaddr = (u_long) device->dev.platform_data;
1543
1544 if ((status = depca_common_init (ioaddr, &dev)))
1545 goto out;
1546
1547 adapter = depca_shmem_probe (&mem_start);
1548
1549 if (adapter == unknown) {
1550 status = -ENODEV;
1551 goto out_free;
1552 }
1553
1554 dev->base_addr = ioaddr;
1555 dev->irq = irq; /* Use whatever value the user gave
1556 * us, and 0 if he didn't. */
1557 lp = dev->priv;
1558 lp->depca_bus = DEPCA_BUS_ISA;
1559 lp->adapter = adapter;
1560 lp->mem_start = mem_start;
1561
1562 if ((status = depca_hw_init(dev, &device->dev)))
1563 goto out_free;
1564
1565 return 0;
1566
1567 out_free:
1568 free_netdev (dev);
1569 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1570 out:
1571 return status;
1572 }
1573
1574 /*
1575 ** EISA callbacks from sysfs.
1576 */
1577
1578 #ifdef CONFIG_EISA
1579 static int __init depca_eisa_probe (struct device *device)
1580 {
1581 struct eisa_device *edev;
1582 struct net_device *dev;
1583 struct depca_private *lp;
1584 u_long ioaddr, mem_start;
1585 int status = 0;
1586
1587 edev = to_eisa_device (device);
1588 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1589
1590 if ((status = depca_common_init (ioaddr, &dev)))
1591 goto out;
1592
1593 /* It would have been nice to get card configuration from the
1594 * card. Unfortunately, this register is write-only (shares
1595 * it's address with the ethernet prom)... As we don't parse
1596 * the EISA configuration structures (yet... :-), just rely on
1597 * the ISA probing to sort it out... */
1598
1599 depca_shmem_probe (&mem_start);
1600
1601 dev->base_addr = ioaddr;
1602 dev->irq = irq;
1603 lp = dev->priv;
1604 lp->depca_bus = DEPCA_BUS_EISA;
1605 lp->adapter = edev->id.driver_data;
1606 lp->mem_start = mem_start;
1607
1608 if ((status = depca_hw_init(dev, device)))
1609 goto out_free;
1610
1611 return 0;
1612
1613 out_free:
1614 free_netdev (dev);
1615 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1616 out:
1617 return status;
1618 }
1619 #endif
1620
1621 static int __devexit depca_device_remove (struct device *device)
1622 {
1623 struct net_device *dev;
1624 struct depca_private *lp;
1625 int bus;
1626
1627 dev = device->driver_data;
1628 lp = dev->priv;
1629
1630 unregister_netdev (dev);
1631 iounmap (lp->sh_mem);
1632 release_mem_region (lp->mem_start, lp->mem_len);
1633 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1634 bus = lp->depca_bus;
1635 free_netdev (dev);
1636
1637 return 0;
1638 }
1639
1640 /*
1641 ** Look for a particular board name in the on-board Remote Diagnostics
1642 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1643 ** base address.
1644 */
1645 static int __init DepcaSignature(char *name, u_long base_addr)
1646 {
1647 u_int i, j, k;
1648 void __iomem *ptr;
1649 char tmpstr[16];
1650 u_long prom_addr = base_addr + 0xc000;
1651 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1652
1653 /* Can't reserve the prom region, it is already marked as
1654 * used, at least on x86. Instead, reserve a memory region a
1655 * board would certainly use. If it works, go ahead. If not,
1656 * run like hell... */
1657
1658 if (!request_mem_region (mem_addr, 16, depca_string))
1659 return unknown;
1660
1661 /* Copy the first 16 bytes of ROM */
1662
1663 ptr = ioremap(prom_addr, 16);
1664 if (ptr == NULL) {
1665 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1666 return unknown;
1667 }
1668 for (i = 0; i < 16; i++) {
1669 tmpstr[i] = readb(ptr + i);
1670 }
1671 iounmap(ptr);
1672
1673 release_mem_region (mem_addr, 16);
1674
1675 /* Check if PROM contains a valid string */
1676 for (i = 0; *depca_signature[i] != '\0'; i++) {
1677 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1678 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1679 k++;
1680 } else { /* lost signature; begin search again */
1681 k = 0;
1682 }
1683 }
1684 if (k == strlen(depca_signature[i]))
1685 break;
1686 }
1687
1688 /* Check if name string is valid, provided there's no PROM */
1689 if (name && *name && (i == unknown)) {
1690 for (i = 0; *depca_signature[i] != '\0'; i++) {
1691 if (strcmp(name, depca_signature[i]) == 0)
1692 break;
1693 }
1694 }
1695
1696 return i;
1697 }
1698
1699 /*
1700 ** Look for a special sequence in the Ethernet station address PROM that
1701 ** is common across all DEPCA products. Note that the original DEPCA needs
1702 ** its ROM address counter to be initialized and enabled. Only enable
1703 ** if the first address octet is a 0x08 - this minimises the chances of
1704 ** messing around with some other hardware, but it assumes that this DEPCA
1705 ** card initialized itself correctly.
1706 **
1707 ** Search the Ethernet address ROM for the signature. Since the ROM address
1708 ** counter can start at an arbitrary point, the search must include the entire
1709 ** probe sequence length plus the (length_of_the_signature - 1).
1710 ** Stop the search IMMEDIATELY after the signature is found so that the
1711 ** PROM address counter is correctly positioned at the start of the
1712 ** ethernet address for later read out.
1713 */
1714 static int __init DevicePresent(u_long ioaddr)
1715 {
1716 union {
1717 struct {
1718 u32 a;
1719 u32 b;
1720 } llsig;
1721 char Sig[sizeof(u32) << 1];
1722 }
1723 dev;
1724 short sigLength = 0;
1725 s8 data;
1726 s16 nicsr;
1727 int i, j, status = 0;
1728
1729 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1730 data = inb(DEPCA_PROM); /* read data */
1731
1732 if (data == 0x08) { /* Enable counter on DEPCA */
1733 nicsr = inb(DEPCA_NICSR);
1734 nicsr |= AAC;
1735 outb(nicsr, DEPCA_NICSR);
1736 }
1737
1738 dev.llsig.a = ETH_PROM_SIG;
1739 dev.llsig.b = ETH_PROM_SIG;
1740 sigLength = sizeof(u32) << 1;
1741
1742 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1743 data = inb(DEPCA_PROM);
1744 if (dev.Sig[j] == data) { /* track signature */
1745 j++;
1746 } else { /* lost signature; begin search again */
1747 if (data == dev.Sig[0]) { /* rare case.... */
1748 j = 1;
1749 } else {
1750 j = 0;
1751 }
1752 }
1753 }
1754
1755 if (j != sigLength) {
1756 status = -ENODEV; /* search failed */
1757 }
1758
1759 return status;
1760 }
1761
1762 /*
1763 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1764 ** reason: access the upper half of the PROM with x=0; access the lower half
1765 ** with x=1.
1766 */
1767 static int __init get_hw_addr(struct net_device *dev)
1768 {
1769 u_long ioaddr = dev->base_addr;
1770 struct depca_private *lp = dev->priv;
1771 int i, k, tmp, status = 0;
1772 u_short j, x, chksum;
1773
1774 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1775
1776 for (i = 0, k = 0, j = 0; j < 3; j++) {
1777 k <<= 1;
1778 if (k > 0xffff)
1779 k -= 0xffff;
1780
1781 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1782 dev->dev_addr[i++] = (u_char) tmp;
1783 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1784 dev->dev_addr[i++] = (u_char) tmp;
1785
1786 if (k > 0xffff)
1787 k -= 0xffff;
1788 }
1789 if (k == 0xffff)
1790 k = 0;
1791
1792 chksum = (u_char) inb(DEPCA_PROM + x);
1793 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1794 if (k != chksum)
1795 status = -1;
1796
1797 return status;
1798 }
1799
1800 /*
1801 ** Load a packet into the shared memory
1802 */
1803 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1804 {
1805 struct depca_private *lp = (struct depca_private *) dev->priv;
1806 int i, entry, end, len, status = 0;
1807
1808 entry = lp->tx_new; /* Ring around buffer number. */
1809 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1810 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1811 /*
1812 ** Caution: the write order is important here... don't set up the
1813 ** ownership rights until all the other information is in place.
1814 */
1815 if (end < entry) { /* wrapped buffer */
1816 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1817 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1818 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1819 } else { /* linear buffer */
1820 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1821 }
1822
1823 /* set up the buffer descriptors */
1824 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1825 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1826 /* clean out flags */
1827 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1828 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1829 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1830 len -= TX_BUFF_SZ;
1831 }
1832 /* clean out flags */
1833 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1834 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1835 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1836
1837 /* start of packet */
1838 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1839 /* end of packet */
1840 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1841
1842 for (i = end; i != entry; --i) {
1843 /* ownership of packet */
1844 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1845 if (i == 0)
1846 i = lp->txRingMask + 1;
1847 }
1848 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1849
1850 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1851 } else {
1852 status = -1;
1853 }
1854
1855 return status;
1856 }
1857
1858 static void depca_dbg_open(struct net_device *dev)
1859 {
1860 struct depca_private *lp = (struct depca_private *) dev->priv;
1861 u_long ioaddr = dev->base_addr;
1862 struct depca_init *p = &lp->init_block;
1863 int i;
1864
1865 if (depca_debug > 1) {
1866 /* Do not copy the shadow init block into shared memory */
1867 /* Debugging should not affect normal operation! */
1868 /* The shadow init block will get copied across during InitRestartDepca */
1869 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1870 printk("Descriptor head addresses (CPU):\n");
1871 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1872 printk("Descriptor addresses (CPU):\nRX: ");
1873 for (i = 0; i < lp->rxRingMask; i++) {
1874 if (i < 3) {
1875 printk("%p ", &lp->rx_ring[i].base);
1876 }
1877 }
1878 printk("...%p\n", &lp->rx_ring[i].base);
1879 printk("TX: ");
1880 for (i = 0; i < lp->txRingMask; i++) {
1881 if (i < 3) {
1882 printk("%p ", &lp->tx_ring[i].base);
1883 }
1884 }
1885 printk("...%p\n", &lp->tx_ring[i].base);
1886 printk("\nDescriptor buffers (Device):\nRX: ");
1887 for (i = 0; i < lp->rxRingMask; i++) {
1888 if (i < 3) {
1889 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1890 }
1891 }
1892 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1893 printk("TX: ");
1894 for (i = 0; i < lp->txRingMask; i++) {
1895 if (i < 3) {
1896 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1897 }
1898 }
1899 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1900 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1901 printk(" mode: 0x%4.4x\n", p->mode);
1902 printk(" physical address: ");
1903 for (i = 0; i < ETH_ALEN - 1; i++) {
1904 printk("%2.2x:", p->phys_addr[i]);
1905 }
1906 printk("%2.2x\n", p->phys_addr[i]);
1907 printk(" multicast hash table: ");
1908 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1909 printk("%2.2x:", p->mcast_table[i]);
1910 }
1911 printk("%2.2x\n", p->mcast_table[i]);
1912 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1913 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1914 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1915 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1916 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1917 outw(CSR2, DEPCA_ADDR);
1918 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1919 outw(CSR1, DEPCA_ADDR);
1920 printk("%4.4x\n", inw(DEPCA_DATA));
1921 outw(CSR3, DEPCA_ADDR);
1922 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1923 }
1924
1925 return;
1926 }
1927
1928 /*
1929 ** Perform IOCTL call functions here. Some are privileged operations and the
1930 ** effective uid is checked in those cases.
1931 ** All multicast IOCTLs will not work here and are for testing purposes only.
1932 */
1933 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1934 {
1935 struct depca_private *lp = (struct depca_private *) dev->priv;
1936 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1937 int i, status = 0;
1938 u_long ioaddr = dev->base_addr;
1939 union {
1940 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1941 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1942 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1943 } tmp;
1944 unsigned long flags;
1945 void *buf;
1946
1947 switch (ioc->cmd) {
1948 case DEPCA_GET_HWADDR: /* Get the hardware address */
1949 for (i = 0; i < ETH_ALEN; i++) {
1950 tmp.addr[i] = dev->dev_addr[i];
1951 }
1952 ioc->len = ETH_ALEN;
1953 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1954 return -EFAULT;
1955 break;
1956
1957 case DEPCA_SET_HWADDR: /* Set the hardware address */
1958 if (!capable(CAP_NET_ADMIN))
1959 return -EPERM;
1960 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1961 return -EFAULT;
1962 for (i = 0; i < ETH_ALEN; i++) {
1963 dev->dev_addr[i] = tmp.addr[i];
1964 }
1965 netif_stop_queue(dev);
1966 while (lp->tx_old != lp->tx_new)
1967 cpu_relax(); /* Wait for the ring to empty */
1968
1969 STOP_DEPCA; /* Temporarily stop the depca. */
1970 depca_init_ring(dev); /* Initialize the descriptor rings */
1971 LoadCSRs(dev); /* Reload CSR3 */
1972 InitRestartDepca(dev); /* Resume normal operation. */
1973 netif_start_queue(dev); /* Unlock the TX ring */
1974 break;
1975
1976 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1977 if (!capable(CAP_NET_ADMIN))
1978 return -EPERM;
1979 netif_stop_queue(dev);
1980 while (lp->tx_old != lp->tx_new)
1981 cpu_relax(); /* Wait for the ring to empty */
1982
1983 STOP_DEPCA; /* Temporarily stop the depca. */
1984 depca_init_ring(dev); /* Initialize the descriptor rings */
1985 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1986
1987 LoadCSRs(dev); /* Reload CSR3 */
1988 InitRestartDepca(dev); /* Resume normal operation. */
1989 netif_start_queue(dev); /* Unlock the TX ring */
1990 break;
1991
1992 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1993 if (!capable(CAP_NET_ADMIN))
1994 return -EPERM;
1995 netif_stop_queue(dev);
1996 while (lp->tx_old != lp->tx_new)
1997 cpu_relax(); /* Wait for the ring to empty */
1998
1999 STOP_DEPCA; /* Temporarily stop the depca. */
2000 depca_init_ring(dev); /* Initialize the descriptor rings */
2001 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
2002
2003 LoadCSRs(dev); /* Reload CSR3 */
2004 InitRestartDepca(dev); /* Resume normal operation. */
2005 netif_start_queue(dev); /* Unlock the TX ring */
2006 break;
2007
2008 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2009 if(!capable(CAP_NET_ADMIN))
2010 return -EPERM;
2011 printk("%s: Boo!\n", dev->name);
2012 break;
2013
2014 case DEPCA_GET_MCA: /* Get the multicast address table */
2015 ioc->len = (HASH_TABLE_LEN >> 3);
2016 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2017 return -EFAULT;
2018 break;
2019
2020 case DEPCA_SET_MCA: /* Set a multicast address */
2021 if (!capable(CAP_NET_ADMIN))
2022 return -EPERM;
2023 if (ioc->len >= HASH_TABLE_LEN)
2024 return -EINVAL;
2025 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2026 return -EFAULT;
2027 set_multicast_list(dev);
2028 break;
2029
2030 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2031 if (!capable(CAP_NET_ADMIN))
2032 return -EPERM;
2033 set_multicast_list(dev);
2034 break;
2035
2036 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2037 if (!capable(CAP_NET_ADMIN))
2038 return -EPERM;
2039 set_multicast_list(dev);
2040 break;
2041
2042 case DEPCA_GET_STATS: /* Get the driver statistics */
2043 ioc->len = sizeof(lp->pktStats);
2044 buf = kmalloc(ioc->len, GFP_KERNEL);
2045 if(!buf)
2046 return -ENOMEM;
2047 spin_lock_irqsave(&lp->lock, flags);
2048 memcpy(buf, &lp->pktStats, ioc->len);
2049 spin_unlock_irqrestore(&lp->lock, flags);
2050 if (copy_to_user(ioc->data, buf, ioc->len))
2051 status = -EFAULT;
2052 kfree(buf);
2053 break;
2054
2055 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2056 if (!capable(CAP_NET_ADMIN))
2057 return -EPERM;
2058 spin_lock_irqsave(&lp->lock, flags);
2059 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2060 spin_unlock_irqrestore(&lp->lock, flags);
2061 break;
2062
2063 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2064 i = 0;
2065 tmp.sval[i++] = inw(DEPCA_NICSR);
2066 outw(CSR0, DEPCA_ADDR); /* status register */
2067 tmp.sval[i++] = inw(DEPCA_DATA);
2068 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2069 ioc->len = i + sizeof(struct depca_init);
2070 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2071 return -EFAULT;
2072 break;
2073
2074 default:
2075 return -EOPNOTSUPP;
2076 }
2077
2078 return status;
2079 }
2080
2081 static int __init depca_module_init (void)
2082 {
2083 int err = 0;
2084
2085 #ifdef CONFIG_MCA
2086 err = mca_register_driver (&depca_mca_driver);
2087 #endif
2088 #ifdef CONFIG_EISA
2089 err |= eisa_driver_register (&depca_eisa_driver);
2090 #endif
2091 err |= platform_driver_register (&depca_isa_driver);
2092 depca_platform_probe ();
2093
2094 return err;
2095 }
2096
2097 static void __exit depca_module_exit (void)
2098 {
2099 int i;
2100 #ifdef CONFIG_MCA
2101 mca_unregister_driver (&depca_mca_driver);
2102 #endif
2103 #ifdef CONFIG_EISA
2104 eisa_driver_unregister (&depca_eisa_driver);
2105 #endif
2106 platform_driver_unregister (&depca_isa_driver);
2107
2108 for (i = 0; depca_io_ports[i].iobase; i++) {
2109 if (depca_io_ports[i].device) {
2110 depca_io_ports[i].device->dev.platform_data = NULL;
2111 platform_device_unregister (depca_io_ports[i].device);
2112 depca_io_ports[i].device = NULL;
2113 }
2114 }
2115 }
2116
2117 module_init (depca_module_init);
2118 module_exit (depca_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree