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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Jeff Garzik6aa20a22006-09-13 13:24:59 -04007 and
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 United States Government
Jeff Garzik6aa20a22006-09-13 13:24:59 -04009 (as represented by the Director, National Security Agency).
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
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
Jeff Garzik6aa20a22006-09-13 13:24:59 -040064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
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]
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400145 To unload a module, turn off the associated interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 '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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400151 option will not work with kernel built-in depca's.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400160 fully stress-tested).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 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>
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400201 0.385 3-apr-95 Fix a recognition bug reported by
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 <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>
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400211 Both above from a suggestion by
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 <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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400221 by <tymm@computer.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238#include <linux/module.h>
239#include <linux/kernel.h>
240#include <linux/string.h>
241#include <linux/errno.h>
242#include <linux/ioport.h>
243#include <linux/slab.h>
244#include <linux/interrupt.h>
245#include <linux/delay.h>
246#include <linux/init.h>
247#include <linux/crc32.h>
248#include <linux/netdevice.h>
249#include <linux/etherdevice.h>
250#include <linux/skbuff.h>
251#include <linux/time.h>
252#include <linux/types.h>
253#include <linux/unistd.h>
254#include <linux/ctype.h>
255#include <linux/moduleparam.h>
Russell Kingd052d1b2005-10-29 19:07:23 +0100256#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257#include <linux/bitops.h>
258
259#include <asm/uaccess.h>
260#include <asm/io.h>
261#include <asm/dma.h>
262
263#ifdef CONFIG_MCA
264#include <linux/mca.h>
265#endif
266
267#ifdef CONFIG_EISA
268#include <linux/eisa.h>
269#endif
270
271#include "depca.h"
272
273static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
274
275#ifdef DEPCA_DEBUG
276static int depca_debug = DEPCA_DEBUG;
277#else
278static int depca_debug = 1;
279#endif
280
281#define DEPCA_NDA 0xffe0 /* No Device Address */
282
283#define TX_TIMEOUT (1*HZ)
284
285/*
286** Ethernet PROM defines
287*/
288#define PROBE_LENGTH 32
289#define ETH_PROM_SIG 0xAA5500FFUL
290
291/*
292** Set the number of Tx and Rx buffers. Ensure that the memory requested
293** here is <= to the amount of shared memory set up by the board switches.
294** The number of descriptors MUST BE A POWER OF 2.
295**
296** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
297*/
298#define NUM_RX_DESC 8 /* Number of RX descriptors */
299#define NUM_TX_DESC 8 /* Number of TX descriptors */
300#define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
301#define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
302
303/*
304** EISA bus defines
305*/
306#define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
307
308/*
309** ISA Bus defines
310*/
311#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
312#define DEPCA_TOTAL_SIZE 0x10
313
314static struct {
315 u_long iobase;
316 struct platform_device *device;
317} depca_io_ports[] = {
318 { 0x300, NULL },
319 { 0x200, NULL },
320 { 0 , NULL },
321};
322
323/*
324** Name <-> Adapter mapping
325*/
326#define DEPCA_SIGNATURE {"DEPCA",\
327 "DE100","DE101",\
328 "DE200","DE201","DE202",\
329 "DE210","DE212",\
330 "DE422",\
331 ""}
332
333static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
334
335enum depca_type {
336 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
337};
338
339static char depca_string[] = "depca";
340
341static int depca_device_remove (struct device *device);
342
343#ifdef CONFIG_EISA
344static struct eisa_device_id depca_eisa_ids[] = {
345 { "DEC4220", de422 },
346 { "" }
347};
348MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
349
350static int depca_eisa_probe (struct device *device);
351
352static struct eisa_driver depca_eisa_driver = {
353 .id_table = depca_eisa_ids,
354 .driver = {
355 .name = depca_string,
356 .probe = depca_eisa_probe,
357 .remove = __devexit_p (depca_device_remove)
358 }
359};
360#endif
361
362#ifdef CONFIG_MCA
363/*
364** Adapter ID for the MCA EtherWORKS DE210/212 adapter
365*/
366#define DE210_ID 0x628d
367#define DE212_ID 0x6def
368
369static short depca_mca_adapter_ids[] = {
370 DE210_ID,
371 DE212_ID,
372 0x0000
373};
374
375static char *depca_mca_adapter_name[] = {
376 "DEC EtherWORKS MC Adapter (DE210)",
377 "DEC EtherWORKS MC Adapter (DE212)",
378 NULL
379};
380
381static enum depca_type depca_mca_adapter_type[] = {
382 de210,
383 de212,
384 0
385};
386
387static int depca_mca_probe (struct device *);
388
389static struct mca_driver depca_mca_driver = {
390 .id_table = depca_mca_adapter_ids,
391 .driver = {
392 .name = depca_string,
393 .bus = &mca_bus_type,
394 .probe = depca_mca_probe,
395 .remove = __devexit_p(depca_device_remove),
396 },
397};
398#endif
399
Russell King3ae5eae2005-11-09 22:32:44 +0000400static int depca_isa_probe (struct platform_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Russell King3ae5eae2005-11-09 22:32:44 +0000402static int __devexit depca_isa_remove(struct platform_device *pdev)
403{
404 return depca_device_remove(&pdev->dev);
405}
406
407static struct platform_driver depca_isa_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 .probe = depca_isa_probe,
Russell King3ae5eae2005-11-09 22:32:44 +0000409 .remove = __devexit_p(depca_isa_remove),
410 .driver = {
411 .name = depca_string,
412 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413};
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415/*
416** Miscellaneous info...
417*/
418#define DEPCA_STRLEN 16
419
420/*
421** Memory Alignment. Each descriptor is 4 longwords long. To force a
422** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
423** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400424** and hence the RX descriptor ring's first entry.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425*/
426#define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
427#define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
428#define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
429
430/*
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400431** The DEPCA Rx and Tx ring descriptors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432*/
433struct depca_rx_desc {
434 volatile s32 base;
435 s16 buf_length; /* This length is negative 2's complement! */
436 s16 msg_length; /* This length is "normal". */
437};
438
439struct depca_tx_desc {
440 volatile s32 base;
441 s16 length; /* This length is negative 2's complement! */
442 s16 misc; /* Errors and TDR info */
443};
444
445#define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
446 to LANCE memory address space */
447
448/*
449** The Lance initialization block, described in databook, in common memory.
450*/
451struct depca_init {
452 u16 mode; /* Mode register */
453 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
454 u8 mcast_table[8]; /* Multicast Hash Table. */
455 u32 rx_ring; /* Rx ring base pointer & ring length */
456 u32 tx_ring; /* Tx ring base pointer & ring length */
457};
458
459#define DEPCA_PKT_STAT_SZ 16
460#define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
461 increase DEPCA_PKT_STAT_SZ */
462struct depca_private {
463 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
464 enum depca_type adapter; /* Adapter type */
465 enum {
466 DEPCA_BUS_MCA = 1,
467 DEPCA_BUS_ISA,
468 DEPCA_BUS_EISA,
469 } depca_bus; /* type of bus */
470 struct depca_init init_block; /* Shadow Initialization block */
471/* CPU address space fields */
472 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
473 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
474 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
475 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
477 u_long mem_start; /* Bus address of device RAM (before remap) */
478 u_long mem_len; /* device memory size */
479/* Device address space fields */
480 u_long device_ram_start; /* Start of RAM in device addr space */
481/* Offsets used in both address spaces */
482 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
483 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
484 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
485/* Kernel-only (not device) fields */
486 int rx_new, tx_new; /* The next free ring entry */
487 int rx_old, tx_old; /* The ring entries to be free()ed. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 spinlock_t lock;
489 struct { /* Private stats counters */
490 u32 bins[DEPCA_PKT_STAT_SZ];
491 u32 unicast;
492 u32 multicast;
493 u32 broadcast;
494 u32 excessive_collisions;
495 u32 tx_underruns;
496 u32 excessive_underruns;
497 } pktStats;
498 int txRingMask; /* TX ring mask */
499 int rxRingMask; /* RX ring mask */
500 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
501 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
502};
503
504/*
505** The transmit ring full condition is described by the tx_old and tx_new
506** pointers by:
507** tx_old = tx_new Empty ring
508** tx_old = tx_new+1 Full ring
509** tx_old+txRingMask = tx_new Full ring (wrapped condition)
510*/
511#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
512 lp->tx_old+lp->txRingMask-lp->tx_new:\
513 lp->tx_old -lp->tx_new-1)
514
515/*
516** Public Functions
517*/
518static int depca_open(struct net_device *dev);
519static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100520static irqreturn_t depca_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521static int depca_close(struct net_device *dev);
522static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
523static void depca_tx_timeout(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524static void set_multicast_list(struct net_device *dev);
525
526/*
527** Private functions
528*/
529static void depca_init_ring(struct net_device *dev);
530static int depca_rx(struct net_device *dev);
531static int depca_tx(struct net_device *dev);
532
533static void LoadCSRs(struct net_device *dev);
534static int InitRestartDepca(struct net_device *dev);
535static int DepcaSignature(char *name, u_long paddr);
536static int DevicePresent(u_long ioaddr);
537static int get_hw_addr(struct net_device *dev);
538static void SetMulticastFilter(struct net_device *dev);
539static int load_packet(struct net_device *dev, struct sk_buff *skb);
540static void depca_dbg_open(struct net_device *dev);
541
542static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
543static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
544static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
545static u_char *depca_irq;
546
547static int irq;
548static int io;
549static char *adapter_name;
550static int mem; /* For loadable module assignment
551 use insmod mem=0x????? .... */
552module_param (irq, int, 0);
553module_param (io, int, 0);
554module_param (adapter_name, charp, 0);
555module_param (mem, int, 0);
556MODULE_PARM_DESC(irq, "DEPCA IRQ number");
557MODULE_PARM_DESC(io, "DEPCA I/O base address");
558MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
559MODULE_PARM_DESC(mem, "DEPCA shared memory address");
560MODULE_LICENSE("GPL");
561
562/*
563** Miscellaneous defines...
564*/
565#define STOP_DEPCA \
566 outw(CSR0, DEPCA_ADDR);\
567 outw(STOP, DEPCA_DATA)
568
569static int __init depca_hw_init (struct net_device *dev, struct device *device)
570{
571 struct depca_private *lp;
572 int i, j, offset, netRAM, mem_len, status = 0;
573 s16 nicsr;
574 u_long ioaddr;
575 u_long mem_start;
Joe Perches0795af52007-10-03 17:59:30 -0700576 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
578 /*
579 * We are now supposed to enter this function with the
580 * following fields filled with proper values :
581 *
582 * dev->base_addr
583 * lp->mem_start
584 * lp->depca_bus
585 * lp->adapter
586 *
587 * dev->irq can be set if known from device configuration (on
588 * MCA or EISA) or module option. Otherwise, it will be auto
589 * detected.
590 */
591
592 ioaddr = dev->base_addr;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 STOP_DEPCA;
595
596 nicsr = inb(DEPCA_NICSR);
597 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
598 outb(nicsr, DEPCA_NICSR);
599
600 if (inw(DEPCA_DATA) != STOP) {
601 return -ENXIO;
602 }
603
604 lp = (struct depca_private *) dev->priv;
605 mem_start = lp->mem_start;
606
607 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
608 return -ENXIO;
609
610 printk ("%s: %s at 0x%04lx",
611 device->bus_id, depca_signature[lp->adapter], ioaddr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 switch (lp->depca_bus) {
614#ifdef CONFIG_MCA
615 case DEPCA_BUS_MCA:
616 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
617 break;
618#endif
619
620#ifdef CONFIG_EISA
621 case DEPCA_BUS_EISA:
622 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
623 break;
624#endif
625
626 case DEPCA_BUS_ISA:
627 break;
628
629 default:
630 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
631 return -ENXIO;
632 }
633
634 printk(", h/w address ");
635 status = get_hw_addr(dev);
Joe Perches0795af52007-10-03 17:59:30 -0700636 printk("%s", print_mac(mac, dev->dev_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 if (status != 0) {
638 printk(" which has an Ethernet PROM CRC error.\n");
639 return -ENXIO;
640 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 /* Set up the maximum amount of network RAM(kB) */
643 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
644 if ((nicsr & _128KB) && (lp->adapter == de422))
645 netRAM = 128;
646
647 /* Shared Memory Base Address */
648 if (nicsr & BUF) {
649 nicsr &= ~BS; /* DEPCA RAM in top 32k */
650 netRAM -= 32;
651
652 /* Only EISA/ISA needs start address to be re-computed */
653 if (lp->depca_bus != DEPCA_BUS_MCA)
654 mem_start += 0x8000;
655 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 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)))
658 > (netRAM << 10)) {
659 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
660 return -ENXIO;
661 }
662
663 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
664
665 /* Enable the shadow RAM. */
666 if (lp->adapter != DEPCA) {
667 nicsr |= SHE;
668 outb(nicsr, DEPCA_NICSR);
669 }
670
671 spin_lock_init(&lp->lock);
672 sprintf(lp->adapter_name, "%s (%s)",
673 depca_signature[lp->adapter], device->bus_id);
674 status = -EBUSY;
675
676 /* Initialisation Block */
677 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
678 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
679 goto out_priv;
680 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 status = -EIO;
683 lp->sh_mem = ioremap(mem_start, mem_len);
684 if (lp->sh_mem == NULL) {
685 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
686 goto out1;
687 }
688
689 lp->mem_start = mem_start;
690 lp->mem_len = mem_len;
691 lp->device_ram_start = mem_start & LA_MASK;
692
693 offset = 0;
694 offset += sizeof(struct depca_init);
695
696 /* Tx & Rx descriptors (aligned to a quadword boundary) */
697 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
698 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
699 lp->rx_ring_offset = offset;
700
701 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
702 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
703 lp->tx_ring_offset = offset;
704
705 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
706
707 lp->buffs_offset = offset;
708
709 /* Finish initialising the ring information. */
710 lp->rxRingMask = NUM_RX_DESC - 1;
711 lp->txRingMask = NUM_TX_DESC - 1;
712
713 /* Calculate Tx/Rx RLEN size for the descriptors. */
714 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
715 j >>= 1;
716 }
717 lp->rx_rlen = (s32) (i << 29);
718 for (i = 0, j = lp->txRingMask; j > 0; i++) {
719 j >>= 1;
720 }
721 lp->tx_rlen = (s32) (i << 29);
722
723 /* Load the initialisation block */
724 depca_init_ring(dev);
725
726 /* Initialise the control and status registers */
727 LoadCSRs(dev);
728
729 /* Enable DEPCA board interrupts for autoprobing */
730 nicsr = ((nicsr & ~IM) | IEN);
731 outb(nicsr, DEPCA_NICSR);
732
733 /* To auto-IRQ we enable the initialization-done and DMA err,
734 interrupts. For now we will always get a DMA error. */
735 if (dev->irq < 2) {
736 unsigned char irqnum;
737 unsigned long irq_mask, delay;
738
739 irq_mask = probe_irq_on();
740
741 /* Assign the correct irq list */
742 switch (lp->adapter) {
743 case DEPCA:
744 case de100:
745 case de101:
746 depca_irq = de1xx_irq;
747 break;
748 case de200:
749 case de201:
750 case de202:
751 case de210:
752 case de212:
753 depca_irq = de2xx_irq;
754 break;
755 case de422:
756 depca_irq = de422_irq;
757 break;
758
759 default:
760 break; /* Not reached */
761 }
762
763 /* Trigger an initialization just for the interrupt. */
764 outw(INEA | INIT, DEPCA_DATA);
765
766 delay = jiffies + HZ/50;
767 while (time_before(jiffies, delay))
768 yield();
769
770 irqnum = probe_irq_off(irq_mask);
771
772 status = -ENXIO;
773 if (!irqnum) {
774 printk(" and failed to detect IRQ line.\n");
775 goto out2;
776 } else {
777 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
778 if (irqnum == depca_irq[i]) {
779 dev->irq = irqnum;
780 printk(" and uses IRQ%d.\n", dev->irq);
781 }
782
783 if (!dev->irq) {
784 printk(" but incorrect IRQ line detected.\n");
785 goto out2;
786 }
787 }
788 } else {
789 printk(" and assigned IRQ%d.\n", dev->irq);
790 }
791
792 if (depca_debug > 1) {
793 printk(version);
794 }
795
796 /* The DEPCA-specific entries in the device structure. */
797 dev->open = &depca_open;
798 dev->hard_start_xmit = &depca_start_xmit;
799 dev->stop = &depca_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 dev->set_multicast_list = &set_multicast_list;
801 dev->do_ioctl = &depca_ioctl;
802 dev->tx_timeout = depca_tx_timeout;
803 dev->watchdog_timeo = TX_TIMEOUT;
804
805 dev->mem_start = 0;
806
807 device->driver_data = dev;
808 SET_NETDEV_DEV (dev, device);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 status = register_netdev(dev);
811 if (status == 0)
812 return 0;
813out2:
814 iounmap(lp->sh_mem);
815out1:
816 release_mem_region (mem_start, mem_len);
817out_priv:
818 return status;
819}
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822static int depca_open(struct net_device *dev)
823{
824 struct depca_private *lp = (struct depca_private *) dev->priv;
825 u_long ioaddr = dev->base_addr;
826 s16 nicsr;
827 int status = 0;
828
829 STOP_DEPCA;
830 nicsr = inb(DEPCA_NICSR);
831
832 /* Make sure the shadow RAM is enabled */
833 if (lp->adapter != DEPCA) {
834 nicsr |= SHE;
835 outb(nicsr, DEPCA_NICSR);
836 }
837
838 /* Re-initialize the DEPCA... */
839 depca_init_ring(dev);
840 LoadCSRs(dev);
841
842 depca_dbg_open(dev);
843
844 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
845 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
846 status = -EAGAIN;
847 } else {
848
849 /* Enable DEPCA board interrupts and turn off LED */
850 nicsr = ((nicsr & ~IM & ~LED) | IEN);
851 outb(nicsr, DEPCA_NICSR);
852 outw(CSR0, DEPCA_ADDR);
853
854 netif_start_queue(dev);
855
856 status = InitRestartDepca(dev);
857
858 if (depca_debug > 1) {
859 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
860 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
861 }
862 }
863 return status;
864}
865
866/* Initialize the lance Rx and Tx descriptor rings. */
867static void depca_init_ring(struct net_device *dev)
868{
869 struct depca_private *lp = (struct depca_private *) dev->priv;
870 u_int i;
871 u_long offset;
872
873 /* Lock out other processes whilst setting up the hardware */
874 netif_stop_queue(dev);
875
876 lp->rx_new = lp->tx_new = 0;
877 lp->rx_old = lp->tx_old = 0;
878
879 /* Initialize the base address and length of each buffer in the ring */
880 for (i = 0; i <= lp->rxRingMask; i++) {
881 offset = lp->buffs_offset + i * RX_BUFF_SZ;
882 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
883 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
884 lp->rx_buff[i] = lp->sh_mem + offset;
885 }
886
887 for (i = 0; i <= lp->txRingMask; i++) {
888 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
889 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
890 lp->tx_buff[i] = lp->sh_mem + offset;
891 }
892
893 /* Set up the initialization block */
894 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
895 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
896
897 SetMulticastFilter(dev);
898
899 for (i = 0; i < ETH_ALEN; i++) {
900 lp->init_block.phys_addr[i] = dev->dev_addr[i];
901 }
902
903 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
904}
905
906
907static void depca_tx_timeout(struct net_device *dev)
908{
909 u_long ioaddr = dev->base_addr;
910
911 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
912
913 STOP_DEPCA;
914 depca_init_ring(dev);
915 LoadCSRs(dev);
916 dev->trans_start = jiffies;
917 netif_wake_queue(dev);
918 InitRestartDepca(dev);
919}
920
921
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400922/*
923** Writes a socket buffer to TX descriptor ring and starts transmission
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924*/
925static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
926{
927 struct depca_private *lp = (struct depca_private *) dev->priv;
928 u_long ioaddr = dev->base_addr;
929 int status = 0;
930
931 /* Transmitter timeout, serious problems. */
932 if (skb->len < 1)
933 goto out;
934
Herbert Xu5b057c62006-06-23 02:06:41 -0700935 if (skb_padto(skb, ETH_ZLEN))
936 goto out;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 netif_stop_queue(dev);
939
940 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
941 status = load_packet(dev, skb);
942
943 if (!status) {
944 /* Trigger an immediate send demand. */
945 outw(CSR0, DEPCA_ADDR);
946 outw(INEA | TDMD, DEPCA_DATA);
947
948 dev->trans_start = jiffies;
949 dev_kfree_skb(skb);
950 }
951 if (TX_BUFFS_AVAIL)
952 netif_start_queue(dev);
953 } else
954 status = -1;
955
956 out:
957 return status;
958}
959
960/*
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400961** The DEPCA interrupt handler.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962*/
David Howells7d12e782006-10-05 14:55:46 +0100963static irqreturn_t depca_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964{
965 struct net_device *dev = dev_id;
966 struct depca_private *lp;
967 s16 csr0, nicsr;
968 u_long ioaddr;
969
970 if (dev == NULL) {
971 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
972 return IRQ_NONE;
973 }
974
975 lp = (struct depca_private *) dev->priv;
976 ioaddr = dev->base_addr;
977
978 spin_lock(&lp->lock);
979
980 /* mask the DEPCA board interrupts and turn on the LED */
981 nicsr = inb(DEPCA_NICSR);
982 nicsr |= (IM | LED);
983 outb(nicsr, DEPCA_NICSR);
984
985 outw(CSR0, DEPCA_ADDR);
986 csr0 = inw(DEPCA_DATA);
987
988 /* Acknowledge all of the current interrupt sources ASAP. */
989 outw(csr0 & INTE, DEPCA_DATA);
990
991 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
992 depca_rx(dev);
993
994 if (csr0 & TINT) /* Tx interrupt (packet sent) */
995 depca_tx(dev);
996
997 /* Any resources available? */
998 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
999 netif_wake_queue(dev);
1000 }
1001
1002 /* Unmask the DEPCA board interrupts and turn off the LED */
1003 nicsr = (nicsr & ~IM & ~LED);
1004 outb(nicsr, DEPCA_NICSR);
1005
1006 spin_unlock(&lp->lock);
1007 return IRQ_HANDLED;
1008}
1009
1010/* Called with lp->lock held */
1011static int depca_rx(struct net_device *dev)
1012{
1013 struct depca_private *lp = (struct depca_private *) dev->priv;
1014 int i, entry;
1015 s32 status;
1016
1017 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1018 status = readl(&lp->rx_ring[entry].base) >> 16;
1019 if (status & R_STP) { /* Remember start of frame */
1020 lp->rx_old = entry;
1021 }
1022 if (status & R_ENP) { /* Valid frame status */
1023 if (status & R_ERR) { /* There was an error. */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001024 dev->stats.rx_errors++; /* Update the error stats. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 if (status & R_FRAM)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001026 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 if (status & R_OFLO)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001028 dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 if (status & R_CRC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001030 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 if (status & R_BUFF)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001032 dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 } else {
1034 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1035 struct sk_buff *skb;
1036
1037 skb = dev_alloc_skb(pkt_len + 2);
1038 if (skb != NULL) {
1039 unsigned char *buf;
1040 skb_reserve(skb, 2); /* 16 byte align the IP header */
1041 buf = skb_put(skb, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 if (entry < lp->rx_old) { /* Wrapped buffer */
1043 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1044 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1045 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1046 } else { /* Linear buffer */
1047 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1048 }
1049
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001050 /*
1051 ** Notify the upper protocol layers that there is another
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 ** packet to handle
1053 */
1054 skb->protocol = eth_type_trans(skb, dev);
1055 netif_rx(skb);
1056
1057 /*
1058 ** Update stats
1059 */
1060 dev->last_rx = jiffies;
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001061 dev->stats.rx_packets++;
1062 dev->stats.rx_bytes += pkt_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1064 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1065 lp->pktStats.bins[i]++;
1066 i = DEPCA_PKT_STAT_SZ;
1067 }
1068 }
1069 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1070 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1071 lp->pktStats.broadcast++;
1072 } else {
1073 lp->pktStats.multicast++;
1074 }
1075 } 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])) {
1076 lp->pktStats.unicast++;
1077 }
1078
1079 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1080 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1081 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1082 }
1083 } else {
1084 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001085 dev->stats.rx_dropped++; /* Really, deferred. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 break;
1087 }
1088 }
1089 /* Change buffer ownership for this last frame, back to the adapter */
1090 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1091 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1092 }
1093 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1094 }
1095
1096 /*
1097 ** Update entry information
1098 */
1099 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1100 }
1101
1102 return 0;
1103}
1104
1105/*
1106** Buffer sent - check for buffer errors.
1107** Called with lp->lock held
1108*/
1109static int depca_tx(struct net_device *dev)
1110{
1111 struct depca_private *lp = (struct depca_private *) dev->priv;
1112 int entry;
1113 s32 status;
1114 u_long ioaddr = dev->base_addr;
1115
1116 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1117 status = readl(&lp->tx_ring[entry].base) >> 16;
1118
1119 if (status < 0) { /* Packet not yet sent! */
1120 break;
1121 } else if (status & T_ERR) { /* An error occurred. */
1122 status = readl(&lp->tx_ring[entry].misc);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001123 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 if (status & TMD3_RTRY)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001125 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 if (status & TMD3_LCAR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001127 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 if (status & TMD3_LCOL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001129 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 if (status & TMD3_UFLO)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001131 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1133 /* Trigger an immediate send demand. */
1134 outw(CSR0, DEPCA_ADDR);
1135 outw(INEA | TDMD, DEPCA_DATA);
1136 }
1137 } else if (status & (T_MORE | T_ONE)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001138 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 } else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001140 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 }
1142
1143 /* Update all the pointers */
1144 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1145 }
1146
1147 return 0;
1148}
1149
1150static int depca_close(struct net_device *dev)
1151{
1152 struct depca_private *lp = (struct depca_private *) dev->priv;
1153 s16 nicsr;
1154 u_long ioaddr = dev->base_addr;
1155
1156 netif_stop_queue(dev);
1157
1158 outw(CSR0, DEPCA_ADDR);
1159
1160 if (depca_debug > 1) {
1161 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1162 }
1163
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001164 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 ** We stop the DEPCA here -- it occasionally polls
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001166 ** memory if we don't.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 */
1168 outw(STOP, DEPCA_DATA);
1169
1170 /*
1171 ** Give back the ROM in case the user wants to go to DOS
1172 */
1173 if (lp->adapter != DEPCA) {
1174 nicsr = inb(DEPCA_NICSR);
1175 nicsr &= ~SHE;
1176 outb(nicsr, DEPCA_NICSR);
1177 }
1178
1179 /*
1180 ** Free the associated irq
1181 */
1182 free_irq(dev->irq, dev);
1183 return 0;
1184}
1185
1186static void LoadCSRs(struct net_device *dev)
1187{
1188 struct depca_private *lp = (struct depca_private *) dev->priv;
1189 u_long ioaddr = dev->base_addr;
1190
1191 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1192 outw((u16) lp->device_ram_start, DEPCA_DATA);
1193 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1194 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1195 outw(CSR3, DEPCA_ADDR); /* ALE control */
1196 outw(ACON, DEPCA_DATA);
1197
1198 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1199
1200 return;
1201}
1202
1203static int InitRestartDepca(struct net_device *dev)
1204{
1205 struct depca_private *lp = (struct depca_private *) dev->priv;
1206 u_long ioaddr = dev->base_addr;
1207 int i, status = 0;
1208
1209 /* Copy the shadow init_block to shared memory */
1210 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1211
1212 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1213 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1214
1215 /* wait for lance to complete initialisation */
1216 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1217
1218 if (i != 100) {
1219 /* clear IDON by writing a "1", enable interrupts and start lance */
1220 outw(IDON | INEA | STRT, DEPCA_DATA);
1221 if (depca_debug > 2) {
1222 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1223 }
1224 } else {
1225 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1226 status = -1;
1227 }
1228
1229 return status;
1230}
1231
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232/*
1233** Set or clear the multicast filter for this adaptor.
1234*/
1235static void set_multicast_list(struct net_device *dev)
1236{
1237 struct depca_private *lp = (struct depca_private *) dev->priv;
1238 u_long ioaddr = dev->base_addr;
1239
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001240 netif_stop_queue(dev);
1241 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001243 STOP_DEPCA; /* Temporarily stop the depca. */
1244 depca_init_ring(dev); /* Initialize the descriptor rings */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001246 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1247 lp->init_block.mode |= PROM;
1248 } else {
1249 SetMulticastFilter(dev);
1250 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 }
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001252
1253 LoadCSRs(dev); /* Reload CSR3 */
1254 InitRestartDepca(dev); /* Resume normal operation. */
1255 netif_start_queue(dev); /* Unlock the TX ring */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
1258/*
1259** Calculate the hash code and update the logical address filter
1260** from a list of ethernet multicast addresses.
1261** Big endian crc one liner is mine, all mine, ha ha ha ha!
1262** LANCE calculates its hash codes big endian.
1263*/
1264static void SetMulticastFilter(struct net_device *dev)
1265{
1266 struct depca_private *lp = (struct depca_private *) dev->priv;
1267 struct dev_mc_list *dmi = dev->mc_list;
1268 char *addrs;
1269 int i, j, bit, byte;
1270 u16 hashcode;
1271 u32 crc;
1272
1273 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1274 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1275 lp->init_block.mcast_table[i] = (char) 0xff;
1276 }
1277 } else {
1278 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1279 lp->init_block.mcast_table[i] = 0;
1280 }
1281 /* Add multicast addresses */
1282 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1283 addrs = dmi->dmi_addr;
1284 dmi = dmi->next;
1285 if ((*addrs & 0x01) == 1) { /* multicast address? */
1286 crc = ether_crc(ETH_ALEN, addrs);
1287 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1288 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1289 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1290 }
1291
1292
1293 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1294 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1295 lp->init_block.mcast_table[byte] |= bit;
1296 }
1297 }
1298 }
1299
1300 return;
1301}
1302
1303static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1304{
1305 int status = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001306
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1308 status = -EBUSY;
1309 goto out;
1310 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001311
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 if (DevicePresent(ioaddr)) {
1313 status = -ENODEV;
1314 goto out_release;
1315 }
1316
1317 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1318 status = -ENOMEM;
1319 goto out_release;
1320 }
1321
1322 return 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 out_release:
1325 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1326 out:
1327 return status;
1328}
1329
1330#ifdef CONFIG_MCA
1331/*
1332** Microchannel bus I/O device probe
1333*/
1334static int __init depca_mca_probe(struct device *device)
1335{
1336 unsigned char pos[2];
1337 unsigned char where;
1338 unsigned long iobase, mem_start;
1339 int irq, err;
1340 struct mca_device *mdev = to_mca_device (device);
1341 struct net_device *dev;
1342 struct depca_private *lp;
1343
1344 /*
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001345 ** Search for the adapter. If an address has been given, search
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 ** specifically for the card at that address. Otherwise find the
1347 ** first card in the system.
1348 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001349
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 pos[0] = mca_device_read_stored_pos(mdev, 2);
1351 pos[1] = mca_device_read_stored_pos(mdev, 3);
1352
1353 /*
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001354 ** IO of card is handled by bits 1 and 2 of pos0.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 **
1356 ** bit2 bit1 IO
1357 ** 0 0 0x2c00
1358 ** 0 1 0x2c10
1359 ** 1 0 0x2c20
1360 ** 1 1 0x2c30
1361 */
1362 where = (pos[0] & 6) >> 1;
1363 iobase = 0x2c00 + (0x10 * where);
1364
1365 /*
1366 ** Found the adapter we were looking for. Now start setting it up.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001367 **
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1369 ** of pos1. Bits are as follows (from the ADF file):
1370 **
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001371 ** Bits
1372 ** 3 2 1 0 IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 ** --------------------
1374 ** 0 0 1 0 5
1375 ** 0 0 0 1 9
1376 ** 0 1 0 0 10
1377 ** 1 0 0 0 11
1378 */
1379 where = pos[1] & 0x0f;
1380 switch (where) {
1381 case 1:
1382 irq = 9;
1383 break;
1384 case 2:
1385 irq = 5;
1386 break;
1387 case 4:
1388 irq = 10;
1389 break;
1390 case 8:
1391 irq = 11;
1392 break;
1393 default:
Eric Sesterhenn6a6bbd22006-03-22 22:49:48 +01001394 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 return -EINVAL;
1396 }
1397
1398 /*
1399 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1400 ** They are mapped as follows:
1401 **
1402 ** Bit
1403 ** 5 4 3 Memory Addresses
1404 ** 0 0 0 C0000-CFFFF (64K)
1405 ** 1 0 0 C8000-CFFFF (32K)
1406 ** 0 0 1 D0000-DFFFF (64K)
1407 ** 1 0 1 D8000-DFFFF (32K)
1408 ** 0 1 0 E0000-EFFFF (64K)
1409 ** 1 1 0 E8000-EFFFF (32K)
1410 */
1411 where = (pos[0] & 0x18) >> 3;
1412 mem_start = 0xc0000 + (where * 0x10000);
1413 if (pos[0] & 0x20) {
1414 mem_start += 0x8000;
1415 }
1416
1417 /* claim the slot */
1418 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1419 sizeof(mdev->name));
1420 mca_device_set_claim(mdev, 1);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001421
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 /*
1423 ** Get everything allocated and initialized... (almost just
1424 ** like the ISA and EISA probes)
1425 */
1426 irq = mca_device_transform_irq(mdev, irq);
1427 iobase = mca_device_transform_ioport(mdev, iobase);
1428
1429 if ((err = depca_common_init (iobase, &dev)))
1430 goto out_unclaim;
1431
1432 dev->irq = irq;
1433 dev->base_addr = iobase;
1434 lp = dev->priv;
1435 lp->depca_bus = DEPCA_BUS_MCA;
1436 lp->adapter = depca_mca_adapter_type[mdev->index];
1437 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001438
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 if ((err = depca_hw_init(dev, device)))
1440 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001441
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 return 0;
1443
1444 out_free:
1445 free_netdev (dev);
1446 release_region (iobase, DEPCA_TOTAL_SIZE);
1447 out_unclaim:
1448 mca_device_set_claim(mdev, 0);
1449
1450 return err;
1451}
1452#endif
1453
1454/*
1455** ISA bus I/O device probe
1456*/
1457
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458static void __init depca_platform_probe (void)
1459{
1460 int i;
1461 struct platform_device *pldev;
1462
1463 for (i = 0; depca_io_ports[i].iobase; i++) {
1464 depca_io_ports[i].device = NULL;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001465
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 /* if an address has been specified on the command
1467 * line, use it (if valid) */
1468 if (io && io != depca_io_ports[i].iobase)
1469 continue;
Russell King5d994b72005-11-05 21:20:21 +00001470
1471 pldev = platform_device_alloc(depca_string, i);
1472 if (!pldev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 continue;
1474
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 depca_io_ports[i].device = pldev;
1477
Russell King5d994b72005-11-05 21:20:21 +00001478 if (platform_device_add(pldev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 depca_io_ports[i].device = NULL;
Andrea Righid91c0882007-04-24 12:40:57 -04001480 pldev->dev.platform_data = NULL;
1481 platform_device_put(pldev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 continue;
1483 }
1484
1485 if (!pldev->dev.driver) {
1486 /* The driver was not bound to this device, there was
1487 * no hardware at this address. Unregister it, as the
1488 * release fuction will take care of freeing the
1489 * allocated structure */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001490
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 depca_io_ports[i].device = NULL;
Russell King5d994b72005-11-05 21:20:21 +00001492 pldev->dev.platform_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 platform_device_unregister (pldev);
1494 }
1495 }
1496}
1497
1498static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1499{
1500 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1501 enum depca_type adapter = unknown;
1502 int i;
1503
1504 for (i = 0; mem_base[i]; i++) {
1505 *mem_start = mem ? mem : mem_base[i];
1506 adapter = DepcaSignature (adapter_name, *mem_start);
1507 if (adapter != unknown)
1508 break;
1509 }
1510
1511 return adapter;
1512}
1513
Russell King3ae5eae2005-11-09 22:32:44 +00001514static int __init depca_isa_probe (struct platform_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515{
1516 struct net_device *dev;
1517 struct depca_private *lp;
1518 u_long ioaddr, mem_start = 0;
1519 enum depca_type adapter = unknown;
1520 int status = 0;
1521
Russell King3ae5eae2005-11-09 22:32:44 +00001522 ioaddr = (u_long) device->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
1524 if ((status = depca_common_init (ioaddr, &dev)))
1525 goto out;
1526
1527 adapter = depca_shmem_probe (&mem_start);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001528
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 if (adapter == unknown) {
1530 status = -ENODEV;
1531 goto out_free;
1532 }
1533
1534 dev->base_addr = ioaddr;
1535 dev->irq = irq; /* Use whatever value the user gave
1536 * us, and 0 if he didn't. */
1537 lp = dev->priv;
1538 lp->depca_bus = DEPCA_BUS_ISA;
1539 lp->adapter = adapter;
1540 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001541
Russell King3ae5eae2005-11-09 22:32:44 +00001542 if ((status = depca_hw_init(dev, &device->dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001544
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 return 0;
1546
1547 out_free:
1548 free_netdev (dev);
1549 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1550 out:
1551 return status;
1552}
1553
1554/*
1555** EISA callbacks from sysfs.
1556*/
1557
1558#ifdef CONFIG_EISA
1559static int __init depca_eisa_probe (struct device *device)
1560{
1561 struct eisa_device *edev;
1562 struct net_device *dev;
1563 struct depca_private *lp;
1564 u_long ioaddr, mem_start;
1565 int status = 0;
1566
1567 edev = to_eisa_device (device);
1568 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1569
1570 if ((status = depca_common_init (ioaddr, &dev)))
1571 goto out;
1572
1573 /* It would have been nice to get card configuration from the
1574 * card. Unfortunately, this register is write-only (shares
1575 * it's address with the ethernet prom)... As we don't parse
1576 * the EISA configuration structures (yet... :-), just rely on
1577 * the ISA probing to sort it out... */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001578
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 depca_shmem_probe (&mem_start);
1580
1581 dev->base_addr = ioaddr;
1582 dev->irq = irq;
1583 lp = dev->priv;
1584 lp->depca_bus = DEPCA_BUS_EISA;
1585 lp->adapter = edev->id.driver_data;
1586 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 if ((status = depca_hw_init(dev, device)))
1589 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001590
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 return 0;
1592
1593 out_free:
1594 free_netdev (dev);
1595 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1596 out:
1597 return status;
1598}
1599#endif
1600
1601static int __devexit depca_device_remove (struct device *device)
1602{
1603 struct net_device *dev;
1604 struct depca_private *lp;
1605 int bus;
1606
1607 dev = device->driver_data;
1608 lp = dev->priv;
1609
1610 unregister_netdev (dev);
1611 iounmap (lp->sh_mem);
1612 release_mem_region (lp->mem_start, lp->mem_len);
1613 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1614 bus = lp->depca_bus;
1615 free_netdev (dev);
1616
1617 return 0;
1618}
1619
1620/*
1621** Look for a particular board name in the on-board Remote Diagnostics
1622** and Boot (readb) ROM. This will also give us a clue to the network RAM
1623** base address.
1624*/
1625static int __init DepcaSignature(char *name, u_long base_addr)
1626{
1627 u_int i, j, k;
1628 void __iomem *ptr;
1629 char tmpstr[16];
1630 u_long prom_addr = base_addr + 0xc000;
1631 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1632
1633 /* Can't reserve the prom region, it is already marked as
1634 * used, at least on x86. Instead, reserve a memory region a
1635 * board would certainly use. If it works, go ahead. If not,
1636 * run like hell... */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001637
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 if (!request_mem_region (mem_addr, 16, depca_string))
1639 return unknown;
1640
1641 /* Copy the first 16 bytes of ROM */
1642
1643 ptr = ioremap(prom_addr, 16);
1644 if (ptr == NULL) {
1645 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1646 return unknown;
1647 }
1648 for (i = 0; i < 16; i++) {
1649 tmpstr[i] = readb(ptr + i);
1650 }
1651 iounmap(ptr);
1652
1653 release_mem_region (mem_addr, 16);
1654
1655 /* Check if PROM contains a valid string */
1656 for (i = 0; *depca_signature[i] != '\0'; i++) {
1657 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1658 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1659 k++;
1660 } else { /* lost signature; begin search again */
1661 k = 0;
1662 }
1663 }
1664 if (k == strlen(depca_signature[i]))
1665 break;
1666 }
1667
1668 /* Check if name string is valid, provided there's no PROM */
1669 if (name && *name && (i == unknown)) {
1670 for (i = 0; *depca_signature[i] != '\0'; i++) {
1671 if (strcmp(name, depca_signature[i]) == 0)
1672 break;
1673 }
1674 }
1675
1676 return i;
1677}
1678
1679/*
1680** Look for a special sequence in the Ethernet station address PROM that
1681** is common across all DEPCA products. Note that the original DEPCA needs
1682** its ROM address counter to be initialized and enabled. Only enable
1683** if the first address octet is a 0x08 - this minimises the chances of
1684** messing around with some other hardware, but it assumes that this DEPCA
1685** card initialized itself correctly.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001686**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687** Search the Ethernet address ROM for the signature. Since the ROM address
1688** counter can start at an arbitrary point, the search must include the entire
1689** probe sequence length plus the (length_of_the_signature - 1).
1690** Stop the search IMMEDIATELY after the signature is found so that the
1691** PROM address counter is correctly positioned at the start of the
1692** ethernet address for later read out.
1693*/
1694static int __init DevicePresent(u_long ioaddr)
1695{
1696 union {
1697 struct {
1698 u32 a;
1699 u32 b;
1700 } llsig;
1701 char Sig[sizeof(u32) << 1];
1702 }
1703 dev;
1704 short sigLength = 0;
1705 s8 data;
1706 s16 nicsr;
1707 int i, j, status = 0;
1708
1709 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1710 data = inb(DEPCA_PROM); /* read data */
1711
1712 if (data == 0x08) { /* Enable counter on DEPCA */
1713 nicsr = inb(DEPCA_NICSR);
1714 nicsr |= AAC;
1715 outb(nicsr, DEPCA_NICSR);
1716 }
1717
1718 dev.llsig.a = ETH_PROM_SIG;
1719 dev.llsig.b = ETH_PROM_SIG;
1720 sigLength = sizeof(u32) << 1;
1721
1722 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1723 data = inb(DEPCA_PROM);
1724 if (dev.Sig[j] == data) { /* track signature */
1725 j++;
1726 } else { /* lost signature; begin search again */
1727 if (data == dev.Sig[0]) { /* rare case.... */
1728 j = 1;
1729 } else {
1730 j = 0;
1731 }
1732 }
1733 }
1734
1735 if (j != sigLength) {
1736 status = -ENODEV; /* search failed */
1737 }
1738
1739 return status;
1740}
1741
1742/*
1743** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1744** reason: access the upper half of the PROM with x=0; access the lower half
1745** with x=1.
1746*/
1747static int __init get_hw_addr(struct net_device *dev)
1748{
1749 u_long ioaddr = dev->base_addr;
1750 struct depca_private *lp = dev->priv;
1751 int i, k, tmp, status = 0;
1752 u_short j, x, chksum;
1753
1754 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1755
1756 for (i = 0, k = 0, j = 0; j < 3; j++) {
1757 k <<= 1;
1758 if (k > 0xffff)
1759 k -= 0xffff;
1760
1761 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1762 dev->dev_addr[i++] = (u_char) tmp;
1763 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1764 dev->dev_addr[i++] = (u_char) tmp;
1765
1766 if (k > 0xffff)
1767 k -= 0xffff;
1768 }
1769 if (k == 0xffff)
1770 k = 0;
1771
1772 chksum = (u_char) inb(DEPCA_PROM + x);
1773 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1774 if (k != chksum)
1775 status = -1;
1776
1777 return status;
1778}
1779
1780/*
1781** Load a packet into the shared memory
1782*/
1783static int load_packet(struct net_device *dev, struct sk_buff *skb)
1784{
1785 struct depca_private *lp = (struct depca_private *) dev->priv;
1786 int i, entry, end, len, status = 0;
1787
1788 entry = lp->tx_new; /* Ring around buffer number. */
1789 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1790 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001791 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792 ** Caution: the write order is important here... don't set up the
1793 ** ownership rights until all the other information is in place.
1794 */
1795 if (end < entry) { /* wrapped buffer */
1796 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1797 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1798 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1799 } else { /* linear buffer */
1800 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1801 }
1802
1803 /* set up the buffer descriptors */
1804 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1805 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1806 /* clean out flags */
1807 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1808 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1809 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1810 len -= TX_BUFF_SZ;
1811 }
1812 /* clean out flags */
1813 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1814 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1815 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1816
1817 /* start of packet */
1818 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1819 /* end of packet */
1820 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1821
1822 for (i = end; i != entry; --i) {
1823 /* ownership of packet */
1824 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1825 if (i == 0)
1826 i = lp->txRingMask + 1;
1827 }
1828 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1829
1830 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1831 } else {
1832 status = -1;
1833 }
1834
1835 return status;
1836}
1837
1838static void depca_dbg_open(struct net_device *dev)
1839{
1840 struct depca_private *lp = (struct depca_private *) dev->priv;
1841 u_long ioaddr = dev->base_addr;
1842 struct depca_init *p = &lp->init_block;
1843 int i;
Joe Perches0795af52007-10-03 17:59:30 -07001844 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845
1846 if (depca_debug > 1) {
1847 /* Do not copy the shadow init block into shared memory */
1848 /* Debugging should not affect normal operation! */
1849 /* The shadow init block will get copied across during InitRestartDepca */
1850 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1851 printk("Descriptor head addresses (CPU):\n");
1852 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1853 printk("Descriptor addresses (CPU):\nRX: ");
1854 for (i = 0; i < lp->rxRingMask; i++) {
1855 if (i < 3) {
1856 printk("%p ", &lp->rx_ring[i].base);
1857 }
1858 }
1859 printk("...%p\n", &lp->rx_ring[i].base);
1860 printk("TX: ");
1861 for (i = 0; i < lp->txRingMask; i++) {
1862 if (i < 3) {
1863 printk("%p ", &lp->tx_ring[i].base);
1864 }
1865 }
1866 printk("...%p\n", &lp->tx_ring[i].base);
1867 printk("\nDescriptor buffers (Device):\nRX: ");
1868 for (i = 0; i < lp->rxRingMask; i++) {
1869 if (i < 3) {
1870 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1871 }
1872 }
1873 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1874 printk("TX: ");
1875 for (i = 0; i < lp->txRingMask; i++) {
1876 if (i < 3) {
1877 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1878 }
1879 }
1880 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1881 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1882 printk(" mode: 0x%4.4x\n", p->mode);
Joe Perches0795af52007-10-03 17:59:30 -07001883 printk(" physical address: %s\n", print_mac(mac, p->phys_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 printk(" multicast hash table: ");
1885 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1886 printk("%2.2x:", p->mcast_table[i]);
1887 }
1888 printk("%2.2x\n", p->mcast_table[i]);
1889 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1890 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1891 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1892 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1893 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1894 outw(CSR2, DEPCA_ADDR);
1895 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1896 outw(CSR1, DEPCA_ADDR);
1897 printk("%4.4x\n", inw(DEPCA_DATA));
1898 outw(CSR3, DEPCA_ADDR);
1899 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1900 }
1901
1902 return;
1903}
1904
1905/*
1906** Perform IOCTL call functions here. Some are privileged operations and the
1907** effective uid is checked in those cases.
1908** All multicast IOCTLs will not work here and are for testing purposes only.
1909*/
1910static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1911{
1912 struct depca_private *lp = (struct depca_private *) dev->priv;
1913 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1914 int i, status = 0;
1915 u_long ioaddr = dev->base_addr;
1916 union {
1917 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1918 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1919 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1920 } tmp;
1921 unsigned long flags;
1922 void *buf;
1923
1924 switch (ioc->cmd) {
1925 case DEPCA_GET_HWADDR: /* Get the hardware address */
1926 for (i = 0; i < ETH_ALEN; i++) {
1927 tmp.addr[i] = dev->dev_addr[i];
1928 }
1929 ioc->len = ETH_ALEN;
1930 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1931 return -EFAULT;
1932 break;
1933
1934 case DEPCA_SET_HWADDR: /* Set the hardware address */
1935 if (!capable(CAP_NET_ADMIN))
1936 return -EPERM;
1937 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1938 return -EFAULT;
1939 for (i = 0; i < ETH_ALEN; i++) {
1940 dev->dev_addr[i] = tmp.addr[i];
1941 }
1942 netif_stop_queue(dev);
1943 while (lp->tx_old != lp->tx_new)
1944 cpu_relax(); /* Wait for the ring to empty */
1945
1946 STOP_DEPCA; /* Temporarily stop the depca. */
1947 depca_init_ring(dev); /* Initialize the descriptor rings */
1948 LoadCSRs(dev); /* Reload CSR3 */
1949 InitRestartDepca(dev); /* Resume normal operation. */
1950 netif_start_queue(dev); /* Unlock the TX ring */
1951 break;
1952
1953 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1954 if (!capable(CAP_NET_ADMIN))
1955 return -EPERM;
1956 netif_stop_queue(dev);
1957 while (lp->tx_old != lp->tx_new)
1958 cpu_relax(); /* Wait for the ring to empty */
1959
1960 STOP_DEPCA; /* Temporarily stop the depca. */
1961 depca_init_ring(dev); /* Initialize the descriptor rings */
1962 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1963
1964 LoadCSRs(dev); /* Reload CSR3 */
1965 InitRestartDepca(dev); /* Resume normal operation. */
1966 netif_start_queue(dev); /* Unlock the TX ring */
1967 break;
1968
1969 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1970 if (!capable(CAP_NET_ADMIN))
1971 return -EPERM;
1972 netif_stop_queue(dev);
1973 while (lp->tx_old != lp->tx_new)
1974 cpu_relax(); /* Wait for the ring to empty */
1975
1976 STOP_DEPCA; /* Temporarily stop the depca. */
1977 depca_init_ring(dev); /* Initialize the descriptor rings */
1978 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1979
1980 LoadCSRs(dev); /* Reload CSR3 */
1981 InitRestartDepca(dev); /* Resume normal operation. */
1982 netif_start_queue(dev); /* Unlock the TX ring */
1983 break;
1984
1985 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1986 if(!capable(CAP_NET_ADMIN))
1987 return -EPERM;
1988 printk("%s: Boo!\n", dev->name);
1989 break;
1990
1991 case DEPCA_GET_MCA: /* Get the multicast address table */
1992 ioc->len = (HASH_TABLE_LEN >> 3);
1993 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
1994 return -EFAULT;
1995 break;
1996
1997 case DEPCA_SET_MCA: /* Set a multicast address */
1998 if (!capable(CAP_NET_ADMIN))
1999 return -EPERM;
2000 if (ioc->len >= HASH_TABLE_LEN)
2001 return -EINVAL;
2002 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2003 return -EFAULT;
2004 set_multicast_list(dev);
2005 break;
2006
2007 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2008 if (!capable(CAP_NET_ADMIN))
2009 return -EPERM;
2010 set_multicast_list(dev);
2011 break;
2012
2013 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2014 if (!capable(CAP_NET_ADMIN))
2015 return -EPERM;
2016 set_multicast_list(dev);
2017 break;
2018
2019 case DEPCA_GET_STATS: /* Get the driver statistics */
2020 ioc->len = sizeof(lp->pktStats);
2021 buf = kmalloc(ioc->len, GFP_KERNEL);
2022 if(!buf)
2023 return -ENOMEM;
2024 spin_lock_irqsave(&lp->lock, flags);
2025 memcpy(buf, &lp->pktStats, ioc->len);
2026 spin_unlock_irqrestore(&lp->lock, flags);
2027 if (copy_to_user(ioc->data, buf, ioc->len))
2028 status = -EFAULT;
2029 kfree(buf);
2030 break;
2031
2032 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2033 if (!capable(CAP_NET_ADMIN))
2034 return -EPERM;
2035 spin_lock_irqsave(&lp->lock, flags);
2036 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2037 spin_unlock_irqrestore(&lp->lock, flags);
2038 break;
2039
2040 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2041 i = 0;
2042 tmp.sval[i++] = inw(DEPCA_NICSR);
2043 outw(CSR0, DEPCA_ADDR); /* status register */
2044 tmp.sval[i++] = inw(DEPCA_DATA);
2045 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2046 ioc->len = i + sizeof(struct depca_init);
2047 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2048 return -EFAULT;
2049 break;
2050
2051 default:
2052 return -EOPNOTSUPP;
2053 }
2054
2055 return status;
2056}
2057
2058static int __init depca_module_init (void)
2059{
2060 int err = 0;
2061
2062#ifdef CONFIG_MCA
2063 err = mca_register_driver (&depca_mca_driver);
2064#endif
2065#ifdef CONFIG_EISA
2066 err |= eisa_driver_register (&depca_eisa_driver);
2067#endif
Russell King3ae5eae2005-11-09 22:32:44 +00002068 err |= platform_driver_register (&depca_isa_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 depca_platform_probe ();
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002070
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 return err;
2072}
2073
2074static void __exit depca_module_exit (void)
2075{
2076 int i;
2077#ifdef CONFIG_MCA
2078 mca_unregister_driver (&depca_mca_driver);
2079#endif
2080#ifdef CONFIG_EISA
2081 eisa_driver_unregister (&depca_eisa_driver);
2082#endif
Russell King3ae5eae2005-11-09 22:32:44 +00002083 platform_driver_unregister (&depca_isa_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085 for (i = 0; depca_io_ports[i].iobase; i++) {
2086 if (depca_io_ports[i].device) {
Russell King5d994b72005-11-05 21:20:21 +00002087 depca_io_ports[i].device->dev.platform_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 platform_device_unregister (depca_io_ports[i].device);
2089 depca_io_ports[i].device = NULL;
2090 }
2091 }
2092}
2093
2094module_init (depca_module_init);
2095module_exit (depca_module_exit);