1
/* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
3
Written 1994, 1995 by David C. Davies.
6
Copyright 1994 David C. Davies
8
United States Government
9
(as represented by the Director, National Security Agency).
11
Copyright 1995 Digital Equipment Corporation.
14
This software may be used and distributed according to the terms of
15
the GNU General Public License, incorporated herein by reference.
17
This driver is written for the Digital Equipment Corporation series
18
of DEPCA and EtherWORKS ethernet cards:
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.
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
37
I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38
a DECstation 5000/200.
40
The author may be reached at davies@maniac.ultranet.com
42
=========================================================================
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.
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
66
Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
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
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]).
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
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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
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variable of the next device structure (which is created if necessary),
93
thus enabling ethif_probe initialization for the device. More than 2
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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.
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************************************************************************
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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
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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
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I/O and memory addresses on the same card. I can't think of a way to do
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this unambiguously at the moment, since there is nothing on the cards to
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tie I/O and memory information together.
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I am unable to test 2 cards together for now, so this code is
109
unchecked. All reports, good or bad, are welcome.
111
************************************************************************
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.
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).
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:
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0) have a copy of the loadable modules code installed on your system.
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1) copy depca.c from the /linux/drivers/net directory to your favourite
128
2) if you wish, edit the source code near line 1530 to reflect the I/O
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address and IRQ you're using (see also 5).
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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).
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4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
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kernel with the depca configuration turned off and reboot.
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5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
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[Alan Cox: Changed the code to allow command line irq/io assignments]
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[Dave Davies: Changed the code to allow command line mem/name
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6) run the net startup bits for your eth?? interface manually
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(usually /etc/rc.inet[12] at boot time).
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Note that autoprobing is not allowed in loadable modules - the system is
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already up and running and you're messing with interrupts.
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To unload a module, turn off the associated interface
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'ifconfig eth?? down' then 'rmmod depca'.
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To assign a base memory address for the shared memory when running as a
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loadable module, see 5 above. To include the adapter name (if you have
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no PROM but know the card name) also see 5 above. Note that this last
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option will not work with kernel built-in depca's.
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The shared memory assignment for a loadable module makes sense to avoid
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the 'memory autoprobe' picking the wrong shared memory (for the case of
157
************************************************************************
158
Support for MCA EtherWORKS cards added 11-3-98.
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Verified to work with up to 2 DE212 cards in a system (although not
160
fully stress-tested).
162
Currently known bugs/limitations:
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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
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specify them if you want, but it will throw your values out.
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You still have to pass the IO address it was configured as
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************************************************************************
178
Version Date Description
180
0.1 25-jan-94 Initial writing.
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0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
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0.3 1-feb-94 Added multiple DEPCA support.
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0.31 4-feb-94 Added DE202 recognition.
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0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
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0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
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Add jabber packet fix from murf@perftech.com
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0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
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0.35 8-mar-94 Added DE201 recognition. Tidied up.
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0.351 30-apr-94 Added EISA support. Added DE422 recognition.
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0.36 16-may-94 DE422 fix released.
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0.37 22-jul-94 Added MODULE support
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0.38 15-aug-94 Added DBR ROM switch in depca_close().
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0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
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0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
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0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
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0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
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<stromain@alf.dec.com>
200
0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
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0.385 3-apr-95 Fix a recognition bug reported by
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<ryan.niemi@lastfrontier.com>
203
0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
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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>
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0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
210
Add 'adapter_name' for loadable modules when no PROM.
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Both above from a suggestion by
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<pchen@woodruffs121.residence.gatech.edu>.
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Add new multicasting code.
214
0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
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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
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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>
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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
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report by <worm@dkik.dk>
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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
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by Matt_Domsch@dell.com
233
0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
235
=========================================================================
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#include <linux/module.h>
239
#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/crc32.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/time.h>
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#include <linux/types.h>
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#include <linux/unistd.h>
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#include <linux/ctype.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/bitops.h>
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#include <asm/uaccess.h>
265
#include <linux/mca.h>
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#include <linux/eisa.h>
274
static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
277
static int depca_debug = DEPCA_DEBUG;
279
static int depca_debug = 1;
282
#define DEPCA_NDA 0xffe0 /* No Device Address */
284
#define TX_TIMEOUT (1*HZ)
287
** Ethernet PROM defines
289
#define PROBE_LENGTH 32
290
#define ETH_PROM_SIG 0xAA5500FFUL
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.
297
** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
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#define NUM_RX_DESC 8 /* Number of RX descriptors */
300
#define NUM_TX_DESC 8 /* Number of TX descriptors */
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#define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
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#define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
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#define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
312
#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
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#define DEPCA_TOTAL_SIZE 0x10
317
struct platform_device *device;
318
} depca_io_ports[] = {
325
** Name <-> Adapter mapping
327
#define DEPCA_SIGNATURE {"DEPCA",\
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"DE200","DE201","DE202",\
334
static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
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DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
340
static char depca_string[] = "depca";
342
static int depca_device_remove (struct device *device);
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static struct eisa_device_id depca_eisa_ids[] = {
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{ "DEC4220", de422 },
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MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
351
static int depca_eisa_probe (struct device *device);
353
static struct eisa_driver depca_eisa_driver = {
354
.id_table = depca_eisa_ids,
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.name = depca_string,
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.probe = depca_eisa_probe,
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.remove = __devexit_p (depca_device_remove)
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** Adapter ID for the MCA EtherWORKS DE210/212 adapter
367
#define DE210_ID 0x628d
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#define DE212_ID 0x6def
370
static short depca_mca_adapter_ids[] = {
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static char *depca_mca_adapter_name[] = {
377
"DEC EtherWORKS MC Adapter (DE210)",
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"DEC EtherWORKS MC Adapter (DE212)",
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static enum depca_type depca_mca_adapter_type[] = {
388
static int depca_mca_probe (struct device *);
390
static struct mca_driver depca_mca_driver = {
391
.id_table = depca_mca_adapter_ids,
393
.name = depca_string,
394
.bus = &mca_bus_type,
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.probe = depca_mca_probe,
396
.remove = __devexit_p(depca_device_remove),
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static int depca_isa_probe (struct platform_device *);
403
static int __devexit depca_isa_remove(struct platform_device *pdev)
405
return depca_device_remove(&pdev->dev);
408
static struct platform_driver depca_isa_driver = {
409
.probe = depca_isa_probe,
410
.remove = __devexit_p(depca_isa_remove),
412
.name = depca_string,
417
** Miscellaneous info...
419
#define DEPCA_STRLEN 16
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.
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... */
432
** The DEPCA Rx and Tx ring descriptors.
434
struct depca_rx_desc {
436
s16 buf_length; /* This length is negative 2's complement! */
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s16 msg_length; /* This length is "normal". */
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struct depca_tx_desc {
442
s16 length; /* This length is negative 2's complement! */
443
s16 misc; /* Errors and TDR info */
446
#define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
447
to LANCE memory address space */
450
** The Lance initialization block, described in databook, in common memory.
453
u16 mode; /* Mode register */
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u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
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u8 mcast_table[8]; /* Multicast Hash Table. */
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u32 rx_ring; /* Rx ring base pointer & ring length */
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u32 tx_ring; /* Tx ring base pointer & ring length */
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 */
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 */
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struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
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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. */
490
struct { /* Private stats counters */
491
u32 bins[DEPCA_PKT_STAT_SZ];
495
u32 excessive_collisions;
497
u32 excessive_underruns;
499
int txRingMask; /* TX ring mask */
500
int rxRingMask; /* RX ring mask */
501
s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
502
s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
506
** The transmit ring full condition is described by the tx_old and tx_new
508
** tx_old = tx_new Empty ring
509
** tx_old = tx_new+1 Full ring
510
** tx_old+txRingMask = tx_new Full ring (wrapped condition)
512
#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
513
lp->tx_old+lp->txRingMask-lp->tx_new:\
514
lp->tx_old -lp->tx_new-1)
519
static int depca_open(struct net_device *dev);
520
static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
521
struct net_device *dev);
522
static irqreturn_t depca_interrupt(int irq, void *dev_id);
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 void set_multicast_list(struct net_device *dev);
531
static void depca_init_ring(struct net_device *dev);
532
static int depca_rx(struct net_device *dev);
533
static int depca_tx(struct net_device *dev);
535
static void LoadCSRs(struct net_device *dev);
536
static int InitRestartDepca(struct net_device *dev);
537
static int DepcaSignature(char *name, u_long paddr);
538
static int DevicePresent(u_long ioaddr);
539
static int get_hw_addr(struct net_device *dev);
540
static void SetMulticastFilter(struct net_device *dev);
541
static int load_packet(struct net_device *dev, struct sk_buff *skb);
542
static void depca_dbg_open(struct net_device *dev);
544
static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
545
static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
546
static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
547
static u_char *depca_irq;
551
static char *adapter_name;
552
static int mem; /* For loadable module assignment
553
use insmod mem=0x????? .... */
554
module_param (irq, int, 0);
555
module_param (io, int, 0);
556
module_param (adapter_name, charp, 0);
557
module_param (mem, int, 0);
558
MODULE_PARM_DESC(irq, "DEPCA IRQ number");
559
MODULE_PARM_DESC(io, "DEPCA I/O base address");
560
MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
561
MODULE_PARM_DESC(mem, "DEPCA shared memory address");
562
MODULE_LICENSE("GPL");
565
** Miscellaneous defines...
568
outw(CSR0, DEPCA_ADDR);\
569
outw(STOP, DEPCA_DATA)
571
static const struct net_device_ops depca_netdev_ops = {
572
.ndo_open = depca_open,
573
.ndo_start_xmit = depca_start_xmit,
574
.ndo_stop = depca_close,
575
.ndo_set_multicast_list = set_multicast_list,
576
.ndo_do_ioctl = depca_ioctl,
577
.ndo_tx_timeout = depca_tx_timeout,
578
.ndo_change_mtu = eth_change_mtu,
579
.ndo_set_mac_address = eth_mac_addr,
580
.ndo_validate_addr = eth_validate_addr,
583
static int __init depca_hw_init (struct net_device *dev, struct device *device)
585
struct depca_private *lp;
586
int i, j, offset, netRAM, mem_len, status = 0;
592
* We are now supposed to enter this function with the
593
* following fields filled with proper values :
600
* dev->irq can be set if known from device configuration (on
601
* MCA or EISA) or module option. Otherwise, it will be auto
605
ioaddr = dev->base_addr;
609
nicsr = inb(DEPCA_NICSR);
610
nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
611
outb(nicsr, DEPCA_NICSR);
613
if (inw(DEPCA_DATA) != STOP) {
617
lp = netdev_priv(dev);
618
mem_start = lp->mem_start;
620
if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
623
printk("%s: %s at 0x%04lx",
624
dev_name(device), depca_signature[lp->adapter], ioaddr);
626
switch (lp->depca_bus) {
629
printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
635
printk(" (EISA slot %d)", to_eisa_device(device)->slot);
643
printk("Unknown DEPCA bus %d\n", lp->depca_bus);
647
printk(", h/w address ");
648
status = get_hw_addr(dev);
649
printk("%pM", dev->dev_addr);
651
printk(" which has an Ethernet PROM CRC error.\n");
655
/* Set up the maximum amount of network RAM(kB) */
656
netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
657
if ((nicsr & _128KB) && (lp->adapter == de422))
660
/* Shared Memory Base Address */
662
nicsr &= ~BS; /* DEPCA RAM in top 32k */
665
/* Only EISA/ISA needs start address to be re-computed */
666
if (lp->depca_bus != DEPCA_BUS_MCA)
670
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)))
672
printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
676
printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
678
/* Enable the shadow RAM. */
679
if (lp->adapter != DEPCA) {
681
outb(nicsr, DEPCA_NICSR);
684
spin_lock_init(&lp->lock);
685
sprintf(lp->adapter_name, "%s (%s)",
686
depca_signature[lp->adapter], dev_name(device));
689
/* Initialisation Block */
690
if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
691
printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
696
lp->sh_mem = ioremap(mem_start, mem_len);
697
if (lp->sh_mem == NULL) {
698
printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
702
lp->mem_start = mem_start;
703
lp->mem_len = mem_len;
704
lp->device_ram_start = mem_start & LA_MASK;
707
offset += sizeof(struct depca_init);
709
/* Tx & Rx descriptors (aligned to a quadword boundary) */
710
offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
711
lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
712
lp->rx_ring_offset = offset;
714
offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
715
lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
716
lp->tx_ring_offset = offset;
718
offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
720
lp->buffs_offset = offset;
722
/* Finish initialising the ring information. */
723
lp->rxRingMask = NUM_RX_DESC - 1;
724
lp->txRingMask = NUM_TX_DESC - 1;
726
/* Calculate Tx/Rx RLEN size for the descriptors. */
727
for (i = 0, j = lp->rxRingMask; j > 0; i++) {
730
lp->rx_rlen = (s32) (i << 29);
731
for (i = 0, j = lp->txRingMask; j > 0; i++) {
734
lp->tx_rlen = (s32) (i << 29);
736
/* Load the initialisation block */
737
depca_init_ring(dev);
739
/* Initialise the control and status registers */
742
/* Enable DEPCA board interrupts for autoprobing */
743
nicsr = ((nicsr & ~IM) | IEN);
744
outb(nicsr, DEPCA_NICSR);
746
/* To auto-IRQ we enable the initialization-done and DMA err,
747
interrupts. For now we will always get a DMA error. */
749
unsigned char irqnum;
750
unsigned long irq_mask, delay;
752
irq_mask = probe_irq_on();
754
/* Assign the correct irq list */
755
switch (lp->adapter) {
759
depca_irq = de1xx_irq;
766
depca_irq = de2xx_irq;
769
depca_irq = de422_irq;
773
break; /* Not reached */
776
/* Trigger an initialization just for the interrupt. */
777
outw(INEA | INIT, DEPCA_DATA);
779
delay = jiffies + HZ/50;
780
while (time_before(jiffies, delay))
783
irqnum = probe_irq_off(irq_mask);
787
printk(" and failed to detect IRQ line.\n");
790
for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
791
if (irqnum == depca_irq[i]) {
793
printk(" and uses IRQ%d.\n", dev->irq);
797
printk(" but incorrect IRQ line detected.\n");
802
printk(" and assigned IRQ%d.\n", dev->irq);
805
if (depca_debug > 1) {
809
/* The DEPCA-specific entries in the device structure. */
810
dev->netdev_ops = &depca_netdev_ops;
811
dev->watchdog_timeo = TX_TIMEOUT;
815
dev_set_drvdata(device, dev);
816
SET_NETDEV_DEV (dev, device);
818
status = register_netdev(dev);
824
release_mem_region (mem_start, mem_len);
830
static int depca_open(struct net_device *dev)
832
struct depca_private *lp = netdev_priv(dev);
833
u_long ioaddr = dev->base_addr;
838
nicsr = inb(DEPCA_NICSR);
840
/* Make sure the shadow RAM is enabled */
841
if (lp->adapter != DEPCA) {
843
outb(nicsr, DEPCA_NICSR);
846
/* Re-initialize the DEPCA... */
847
depca_init_ring(dev);
852
if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
853
printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
857
/* Enable DEPCA board interrupts and turn off LED */
858
nicsr = ((nicsr & ~IM & ~LED) | IEN);
859
outb(nicsr, DEPCA_NICSR);
860
outw(CSR0, DEPCA_ADDR);
862
netif_start_queue(dev);
864
status = InitRestartDepca(dev);
866
if (depca_debug > 1) {
867
printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
868
printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
874
/* Initialize the lance Rx and Tx descriptor rings. */
875
static void depca_init_ring(struct net_device *dev)
877
struct depca_private *lp = netdev_priv(dev);
881
/* Lock out other processes whilst setting up the hardware */
882
netif_stop_queue(dev);
884
lp->rx_new = lp->tx_new = 0;
885
lp->rx_old = lp->tx_old = 0;
887
/* Initialize the base address and length of each buffer in the ring */
888
for (i = 0; i <= lp->rxRingMask; i++) {
889
offset = lp->buffs_offset + i * RX_BUFF_SZ;
890
writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
891
writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
892
lp->rx_buff[i] = lp->sh_mem + offset;
895
for (i = 0; i <= lp->txRingMask; i++) {
896
offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
897
writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
898
lp->tx_buff[i] = lp->sh_mem + offset;
901
/* Set up the initialization block */
902
lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
903
lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
905
SetMulticastFilter(dev);
907
for (i = 0; i < ETH_ALEN; i++) {
908
lp->init_block.phys_addr[i] = dev->dev_addr[i];
911
lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
915
static void depca_tx_timeout(struct net_device *dev)
917
u_long ioaddr = dev->base_addr;
919
printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
922
depca_init_ring(dev);
924
dev->trans_start = jiffies; /* prevent tx timeout */
925
netif_wake_queue(dev);
926
InitRestartDepca(dev);
931
** Writes a socket buffer to TX descriptor ring and starts transmission
933
static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
934
struct net_device *dev)
936
struct depca_private *lp = netdev_priv(dev);
937
u_long ioaddr = dev->base_addr;
940
/* Transmitter timeout, serious problems. */
944
if (skb_padto(skb, ETH_ZLEN))
947
netif_stop_queue(dev);
949
if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950
status = load_packet(dev, skb);
953
/* Trigger an immediate send demand. */
954
outw(CSR0, DEPCA_ADDR);
955
outw(INEA | TDMD, DEPCA_DATA);
960
netif_start_queue(dev);
962
status = NETDEV_TX_LOCKED;
969
** The DEPCA interrupt handler.
971
static irqreturn_t depca_interrupt(int irq, void *dev_id)
973
struct net_device *dev = dev_id;
974
struct depca_private *lp;
979
printk("depca_interrupt(): irq %d for unknown device.\n", irq);
983
lp = netdev_priv(dev);
984
ioaddr = dev->base_addr;
986
spin_lock(&lp->lock);
988
/* mask the DEPCA board interrupts and turn on the LED */
989
nicsr = inb(DEPCA_NICSR);
991
outb(nicsr, DEPCA_NICSR);
993
outw(CSR0, DEPCA_ADDR);
994
csr0 = inw(DEPCA_DATA);
996
/* Acknowledge all of the current interrupt sources ASAP. */
997
outw(csr0 & INTE, DEPCA_DATA);
999
if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1002
if (csr0 & TINT) /* Tx interrupt (packet sent) */
1005
/* Any resources available? */
1006
if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1007
netif_wake_queue(dev);
1010
/* Unmask the DEPCA board interrupts and turn off the LED */
1011
nicsr = (nicsr & ~IM & ~LED);
1012
outb(nicsr, DEPCA_NICSR);
1014
spin_unlock(&lp->lock);
1018
/* Called with lp->lock held */
1019
static int depca_rx(struct net_device *dev)
1021
struct depca_private *lp = netdev_priv(dev);
1025
for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1026
status = readl(&lp->rx_ring[entry].base) >> 16;
1027
if (status & R_STP) { /* Remember start of frame */
1030
if (status & R_ENP) { /* Valid frame status */
1031
if (status & R_ERR) { /* There was an error. */
1032
dev->stats.rx_errors++; /* Update the error stats. */
1033
if (status & R_FRAM)
1034
dev->stats.rx_frame_errors++;
1035
if (status & R_OFLO)
1036
dev->stats.rx_over_errors++;
1038
dev->stats.rx_crc_errors++;
1039
if (status & R_BUFF)
1040
dev->stats.rx_fifo_errors++;
1042
short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1043
struct sk_buff *skb;
1045
skb = dev_alloc_skb(pkt_len + 2);
1048
skb_reserve(skb, 2); /* 16 byte align the IP header */
1049
buf = skb_put(skb, pkt_len);
1050
if (entry < lp->rx_old) { /* Wrapped buffer */
1051
len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1052
memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1053
memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1054
} else { /* Linear buffer */
1055
memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1059
** Notify the upper protocol layers that there is another
1062
skb->protocol = eth_type_trans(skb, dev);
1068
dev->stats.rx_packets++;
1069
dev->stats.rx_bytes += pkt_len;
1070
for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1071
if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1072
lp->pktStats.bins[i]++;
1073
i = DEPCA_PKT_STAT_SZ;
1076
if (buf[0] & 0x01) { /* Multicast/Broadcast */
1077
if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1078
lp->pktStats.broadcast++;
1080
lp->pktStats.multicast++;
1082
} else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1083
lp->pktStats.unicast++;
1086
lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1087
if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1088
memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1091
printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1092
dev->stats.rx_dropped++; /* Really, deferred. */
1096
/* Change buffer ownership for this last frame, back to the adapter */
1097
for (; lp->rx_old != entry; lp->rx_old = (lp->rx_old + 1) & lp->rxRingMask) {
1098
writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1100
writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1104
** Update entry information
1106
lp->rx_new = (lp->rx_new + 1) & lp->rxRingMask;
1113
** Buffer sent - check for buffer errors.
1114
** Called with lp->lock held
1116
static int depca_tx(struct net_device *dev)
1118
struct depca_private *lp = netdev_priv(dev);
1121
u_long ioaddr = dev->base_addr;
1123
for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1124
status = readl(&lp->tx_ring[entry].base) >> 16;
1126
if (status < 0) { /* Packet not yet sent! */
1128
} else if (status & T_ERR) { /* An error occurred. */
1129
status = readl(&lp->tx_ring[entry].misc);
1130
dev->stats.tx_errors++;
1131
if (status & TMD3_RTRY)
1132
dev->stats.tx_aborted_errors++;
1133
if (status & TMD3_LCAR)
1134
dev->stats.tx_carrier_errors++;
1135
if (status & TMD3_LCOL)
1136
dev->stats.tx_window_errors++;
1137
if (status & TMD3_UFLO)
1138
dev->stats.tx_fifo_errors++;
1139
if (status & (TMD3_BUFF | TMD3_UFLO)) {
1140
/* Trigger an immediate send demand. */
1141
outw(CSR0, DEPCA_ADDR);
1142
outw(INEA | TDMD, DEPCA_DATA);
1144
} else if (status & (T_MORE | T_ONE)) {
1145
dev->stats.collisions++;
1147
dev->stats.tx_packets++;
1150
/* Update all the pointers */
1151
lp->tx_old = (lp->tx_old + 1) & lp->txRingMask;
1157
static int depca_close(struct net_device *dev)
1159
struct depca_private *lp = netdev_priv(dev);
1161
u_long ioaddr = dev->base_addr;
1163
netif_stop_queue(dev);
1165
outw(CSR0, DEPCA_ADDR);
1167
if (depca_debug > 1) {
1168
printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1172
** We stop the DEPCA here -- it occasionally polls
1173
** memory if we don't.
1175
outw(STOP, DEPCA_DATA);
1178
** Give back the ROM in case the user wants to go to DOS
1180
if (lp->adapter != DEPCA) {
1181
nicsr = inb(DEPCA_NICSR);
1183
outb(nicsr, DEPCA_NICSR);
1187
** Free the associated irq
1189
free_irq(dev->irq, dev);
1193
static void LoadCSRs(struct net_device *dev)
1195
struct depca_private *lp = netdev_priv(dev);
1196
u_long ioaddr = dev->base_addr;
1198
outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1199
outw((u16) lp->device_ram_start, DEPCA_DATA);
1200
outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1201
outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1202
outw(CSR3, DEPCA_ADDR); /* ALE control */
1203
outw(ACON, DEPCA_DATA);
1205
outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1208
static int InitRestartDepca(struct net_device *dev)
1210
struct depca_private *lp = netdev_priv(dev);
1211
u_long ioaddr = dev->base_addr;
1214
/* Copy the shadow init_block to shared memory */
1215
memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1217
outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1218
outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1220
/* wait for lance to complete initialisation */
1221
for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1224
/* clear IDON by writing a "1", enable interrupts and start lance */
1225
outw(IDON | INEA | STRT, DEPCA_DATA);
1226
if (depca_debug > 2) {
1227
printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230
printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1238
** Set or clear the multicast filter for this adaptor.
1240
static void set_multicast_list(struct net_device *dev)
1242
struct depca_private *lp = netdev_priv(dev);
1243
u_long ioaddr = dev->base_addr;
1245
netif_stop_queue(dev);
1246
while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1248
STOP_DEPCA; /* Temporarily stop the depca. */
1249
depca_init_ring(dev); /* Initialize the descriptor rings */
1251
if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1252
lp->init_block.mode |= PROM;
1254
SetMulticastFilter(dev);
1255
lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1258
LoadCSRs(dev); /* Reload CSR3 */
1259
InitRestartDepca(dev); /* Resume normal operation. */
1260
netif_start_queue(dev); /* Unlock the TX ring */
1264
** Calculate the hash code and update the logical address filter
1265
** from a list of ethernet multicast addresses.
1266
** Big endian crc one liner is mine, all mine, ha ha ha ha!
1267
** LANCE calculates its hash codes big endian.
1269
static void SetMulticastFilter(struct net_device *dev)
1271
struct depca_private *lp = netdev_priv(dev);
1272
struct netdev_hw_addr *ha;
1274
int i, j, bit, byte;
1278
if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1279
for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1280
lp->init_block.mcast_table[i] = (char) 0xff;
1283
for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1284
lp->init_block.mcast_table[i] = 0;
1286
/* Add multicast addresses */
1287
netdev_for_each_mc_addr(ha, dev) {
1289
if ((*addrs & 0x01) == 1) { /* multicast address? */
1290
crc = ether_crc(ETH_ALEN, addrs);
1291
hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1292
for (j = 0; j < 5; j++) { /* ... in reverse order. */
1293
hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1297
byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1298
bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1299
lp->init_block.mcast_table[byte] |= bit;
1305
static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1309
if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1314
if (DevicePresent(ioaddr)) {
1319
if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1327
release_region (ioaddr, DEPCA_TOTAL_SIZE);
1334
** Microchannel bus I/O device probe
1336
static int __init depca_mca_probe(struct device *device)
1338
unsigned char pos[2];
1339
unsigned char where;
1340
unsigned long iobase, mem_start;
1342
struct mca_device *mdev = to_mca_device (device);
1343
struct net_device *dev;
1344
struct depca_private *lp;
1347
** Search for the adapter. If an address has been given, search
1348
** specifically for the card at that address. Otherwise find the
1349
** first card in the system.
1352
pos[0] = mca_device_read_stored_pos(mdev, 2);
1353
pos[1] = mca_device_read_stored_pos(mdev, 3);
1356
** IO of card is handled by bits 1 and 2 of pos0.
1364
where = (pos[0] & 6) >> 1;
1365
iobase = 0x2c00 + (0x10 * where);
1368
** Found the adapter we were looking for. Now start setting it up.
1370
** First work on decoding the IRQ. It's stored in the lower 4 bits
1371
** of pos1. Bits are as follows (from the ADF file):
1375
** --------------------
1381
where = pos[1] & 0x0f;
1396
printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1401
** Shared memory address of adapter is stored in bits 3-5 of pos0.
1402
** They are mapped as follows:
1405
** 5 4 3 Memory Addresses
1406
** 0 0 0 C0000-CFFFF (64K)
1407
** 1 0 0 C8000-CFFFF (32K)
1408
** 0 0 1 D0000-DFFFF (64K)
1409
** 1 0 1 D8000-DFFFF (32K)
1410
** 0 1 0 E0000-EFFFF (64K)
1411
** 1 1 0 E8000-EFFFF (32K)
1413
where = (pos[0] & 0x18) >> 3;
1414
mem_start = 0xc0000 + (where * 0x10000);
1415
if (pos[0] & 0x20) {
1416
mem_start += 0x8000;
1419
/* claim the slot */
1420
strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1421
sizeof(mdev->name));
1422
mca_device_set_claim(mdev, 1);
1425
** Get everything allocated and initialized... (almost just
1426
** like the ISA and EISA probes)
1428
irq = mca_device_transform_irq(mdev, irq);
1429
iobase = mca_device_transform_ioport(mdev, iobase);
1431
if ((err = depca_common_init (iobase, &dev)))
1435
dev->base_addr = iobase;
1436
lp = netdev_priv(dev);
1437
lp->depca_bus = DEPCA_BUS_MCA;
1438
lp->adapter = depca_mca_adapter_type[mdev->index];
1439
lp->mem_start = mem_start;
1441
if ((err = depca_hw_init(dev, device)))
1448
release_region (iobase, DEPCA_TOTAL_SIZE);
1450
mca_device_set_claim(mdev, 0);
1457
** ISA bus I/O device probe
1460
static void __init depca_platform_probe (void)
1463
struct platform_device *pldev;
1465
for (i = 0; depca_io_ports[i].iobase; i++) {
1466
depca_io_ports[i].device = NULL;
1468
/* if an address has been specified on the command
1469
* line, use it (if valid) */
1470
if (io && io != depca_io_ports[i].iobase)
1473
pldev = platform_device_alloc(depca_string, i);
1477
pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1478
depca_io_ports[i].device = pldev;
1480
if (platform_device_add(pldev)) {
1481
depca_io_ports[i].device = NULL;
1482
pldev->dev.platform_data = NULL;
1483
platform_device_put(pldev);
1487
if (!pldev->dev.driver) {
1488
/* The driver was not bound to this device, there was
1489
* no hardware at this address. Unregister it, as the
1490
* release function will take care of freeing the
1491
* allocated structure */
1493
depca_io_ports[i].device = NULL;
1494
pldev->dev.platform_data = NULL;
1495
platform_device_unregister (pldev);
1500
static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1502
u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1503
enum depca_type adapter = unknown;
1506
for (i = 0; mem_base[i]; i++) {
1507
*mem_start = mem ? mem : mem_base[i];
1508
adapter = DepcaSignature (adapter_name, *mem_start);
1509
if (adapter != unknown)
1516
static int __devinit depca_isa_probe (struct platform_device *device)
1518
struct net_device *dev;
1519
struct depca_private *lp;
1520
u_long ioaddr, mem_start = 0;
1521
enum depca_type adapter = unknown;
1524
ioaddr = (u_long) device->dev.platform_data;
1526
if ((status = depca_common_init (ioaddr, &dev)))
1529
adapter = depca_shmem_probe (&mem_start);
1531
if (adapter == unknown) {
1536
dev->base_addr = ioaddr;
1537
dev->irq = irq; /* Use whatever value the user gave
1538
* us, and 0 if he didn't. */
1539
lp = netdev_priv(dev);
1540
lp->depca_bus = DEPCA_BUS_ISA;
1541
lp->adapter = adapter;
1542
lp->mem_start = mem_start;
1544
if ((status = depca_hw_init(dev, &device->dev)))
1551
release_region (ioaddr, DEPCA_TOTAL_SIZE);
1557
** EISA callbacks from sysfs.
1561
static int __init depca_eisa_probe (struct device *device)
1563
enum depca_type adapter = unknown;
1564
struct eisa_device *edev;
1565
struct net_device *dev;
1566
struct depca_private *lp;
1567
u_long ioaddr, mem_start;
1570
edev = to_eisa_device (device);
1571
ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1573
if ((status = depca_common_init (ioaddr, &dev)))
1576
/* It would have been nice to get card configuration from the
1577
* card. Unfortunately, this register is write-only (shares
1578
* it's address with the ethernet prom)... As we don't parse
1579
* the EISA configuration structures (yet... :-), just rely on
1580
* the ISA probing to sort it out... */
1582
adapter = depca_shmem_probe (&mem_start);
1583
if (adapter == unknown) {
1588
dev->base_addr = ioaddr;
1590
lp = netdev_priv(dev);
1591
lp->depca_bus = DEPCA_BUS_EISA;
1592
lp->adapter = edev->id.driver_data;
1593
lp->mem_start = mem_start;
1595
if ((status = depca_hw_init(dev, device)))
1602
release_region (ioaddr, DEPCA_TOTAL_SIZE);
1608
static int __devexit depca_device_remove (struct device *device)
1610
struct net_device *dev;
1611
struct depca_private *lp;
1614
dev = dev_get_drvdata(device);
1615
lp = netdev_priv(dev);
1617
unregister_netdev (dev);
1618
iounmap (lp->sh_mem);
1619
release_mem_region (lp->mem_start, lp->mem_len);
1620
release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1621
bus = lp->depca_bus;
1628
** Look for a particular board name in the on-board Remote Diagnostics
1629
** and Boot (readb) ROM. This will also give us a clue to the network RAM
1632
static int __init DepcaSignature(char *name, u_long base_addr)
1637
u_long prom_addr = base_addr + 0xc000;
1638
u_long mem_addr = base_addr + 0x8000; /* 32KB */
1640
/* Can't reserve the prom region, it is already marked as
1641
* used, at least on x86. Instead, reserve a memory region a
1642
* board would certainly use. If it works, go ahead. If not,
1643
* run like hell... */
1645
if (!request_mem_region (mem_addr, 16, depca_string))
1648
/* Copy the first 16 bytes of ROM */
1650
ptr = ioremap(prom_addr, 16);
1652
printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1655
for (i = 0; i < 16; i++) {
1656
tmpstr[i] = readb(ptr + i);
1660
release_mem_region (mem_addr, 16);
1662
/* Check if PROM contains a valid string */
1663
for (i = 0; *depca_signature[i] != '\0'; i++) {
1664
for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1665
if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1667
} else { /* lost signature; begin search again */
1671
if (k == strlen(depca_signature[i]))
1675
/* Check if name string is valid, provided there's no PROM */
1676
if (name && *name && (i == unknown)) {
1677
for (i = 0; *depca_signature[i] != '\0'; i++) {
1678
if (strcmp(name, depca_signature[i]) == 0)
1687
** Look for a special sequence in the Ethernet station address PROM that
1688
** is common across all DEPCA products. Note that the original DEPCA needs
1689
** its ROM address counter to be initialized and enabled. Only enable
1690
** if the first address octet is a 0x08 - this minimises the chances of
1691
** messing around with some other hardware, but it assumes that this DEPCA
1692
** card initialized itself correctly.
1694
** Search the Ethernet address ROM for the signature. Since the ROM address
1695
** counter can start at an arbitrary point, the search must include the entire
1696
** probe sequence length plus the (length_of_the_signature - 1).
1697
** Stop the search IMMEDIATELY after the signature is found so that the
1698
** PROM address counter is correctly positioned at the start of the
1699
** ethernet address for later read out.
1701
static int __init DevicePresent(u_long ioaddr)
1708
char Sig[sizeof(u32) << 1];
1711
short sigLength = 0;
1714
int i, j, status = 0;
1716
data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1717
data = inb(DEPCA_PROM); /* read data */
1719
if (data == 0x08) { /* Enable counter on DEPCA */
1720
nicsr = inb(DEPCA_NICSR);
1722
outb(nicsr, DEPCA_NICSR);
1725
dev.llsig.a = ETH_PROM_SIG;
1726
dev.llsig.b = ETH_PROM_SIG;
1727
sigLength = sizeof(u32) << 1;
1729
for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1730
data = inb(DEPCA_PROM);
1731
if (dev.Sig[j] == data) { /* track signature */
1733
} else { /* lost signature; begin search again */
1734
if (data == dev.Sig[0]) { /* rare case.... */
1742
if (j != sigLength) {
1743
status = -ENODEV; /* search failed */
1750
** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1751
** reason: access the upper half of the PROM with x=0; access the lower half
1754
static int __init get_hw_addr(struct net_device *dev)
1756
u_long ioaddr = dev->base_addr;
1757
struct depca_private *lp = netdev_priv(dev);
1758
int i, k, tmp, status = 0;
1759
u_short j, x, chksum;
1761
x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1763
for (i = 0, k = 0, j = 0; j < 3; j++) {
1768
k += (u_char) (tmp = inb(DEPCA_PROM + x));
1769
dev->dev_addr[i++] = (u_char) tmp;
1770
k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1771
dev->dev_addr[i++] = (u_char) tmp;
1779
chksum = (u_char) inb(DEPCA_PROM + x);
1780
chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1788
** Load a packet into the shared memory
1790
static int load_packet(struct net_device *dev, struct sk_buff *skb)
1792
struct depca_private *lp = netdev_priv(dev);
1793
int i, entry, end, len, status = NETDEV_TX_OK;
1795
entry = lp->tx_new; /* Ring around buffer number. */
1796
end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1797
if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1799
** Caution: the write order is important here... don't set up the
1800
** ownership rights until all the other information is in place.
1802
if (end < entry) { /* wrapped buffer */
1803
len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1804
memcpy_toio(lp->tx_buff[entry], skb->data, len);
1805
memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1806
} else { /* linear buffer */
1807
memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1810
/* set up the buffer descriptors */
1811
len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1812
for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1813
/* clean out flags */
1814
writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1815
writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1816
writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1819
/* clean out flags */
1820
writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1821
writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1822
writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1824
/* start of packet */
1825
writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1827
writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1829
for (i = end; i != entry; --i) {
1830
/* ownership of packet */
1831
writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1833
i = lp->txRingMask + 1;
1835
writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1837
lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1839
status = NETDEV_TX_LOCKED;
1845
static void depca_dbg_open(struct net_device *dev)
1847
struct depca_private *lp = netdev_priv(dev);
1848
u_long ioaddr = dev->base_addr;
1849
struct depca_init *p = &lp->init_block;
1852
if (depca_debug > 1) {
1853
/* Do not copy the shadow init block into shared memory */
1854
/* Debugging should not affect normal operation! */
1855
/* The shadow init block will get copied across during InitRestartDepca */
1856
printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1857
printk("Descriptor head addresses (CPU):\n");
1858
printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1859
printk("Descriptor addresses (CPU):\nRX: ");
1860
for (i = 0; i < lp->rxRingMask; i++) {
1862
printk("%p ", &lp->rx_ring[i].base);
1865
printk("...%p\n", &lp->rx_ring[i].base);
1867
for (i = 0; i < lp->txRingMask; i++) {
1869
printk("%p ", &lp->tx_ring[i].base);
1872
printk("...%p\n", &lp->tx_ring[i].base);
1873
printk("\nDescriptor buffers (Device):\nRX: ");
1874
for (i = 0; i < lp->rxRingMask; i++) {
1876
printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1879
printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1881
for (i = 0; i < lp->txRingMask; i++) {
1883
printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1886
printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1887
printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1888
printk(" mode: 0x%4.4x\n", p->mode);
1889
printk(" physical address: %pM\n", p->phys_addr);
1890
printk(" multicast hash table: ");
1891
for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1892
printk("%2.2x:", p->mcast_table[i]);
1894
printk("%2.2x\n", p->mcast_table[i]);
1895
printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1896
printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1897
printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1898
printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1899
printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1900
outw(CSR2, DEPCA_ADDR);
1901
printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1902
outw(CSR1, DEPCA_ADDR);
1903
printk("%4.4x\n", inw(DEPCA_DATA));
1904
outw(CSR3, DEPCA_ADDR);
1905
printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1910
** Perform IOCTL call functions here. Some are privileged operations and the
1911
** effective uid is checked in those cases.
1912
** All multicast IOCTLs will not work here and are for testing purposes only.
1914
static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1916
struct depca_private *lp = netdev_priv(dev);
1917
struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1919
u_long ioaddr = dev->base_addr;
1921
u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1922
u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1923
u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1925
unsigned long flags;
1929
case DEPCA_GET_HWADDR: /* Get the hardware address */
1930
for (i = 0; i < ETH_ALEN; i++) {
1931
tmp.addr[i] = dev->dev_addr[i];
1933
ioc->len = ETH_ALEN;
1934
if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1938
case DEPCA_SET_HWADDR: /* Set the hardware address */
1939
if (!capable(CAP_NET_ADMIN))
1941
if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1943
for (i = 0; i < ETH_ALEN; i++) {
1944
dev->dev_addr[i] = tmp.addr[i];
1946
netif_stop_queue(dev);
1947
while (lp->tx_old != lp->tx_new)
1948
cpu_relax(); /* Wait for the ring to empty */
1950
STOP_DEPCA; /* Temporarily stop the depca. */
1951
depca_init_ring(dev); /* Initialize the descriptor rings */
1952
LoadCSRs(dev); /* Reload CSR3 */
1953
InitRestartDepca(dev); /* Resume normal operation. */
1954
netif_start_queue(dev); /* Unlock the TX ring */
1957
case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1958
if (!capable(CAP_NET_ADMIN))
1960
netif_stop_queue(dev);
1961
while (lp->tx_old != lp->tx_new)
1962
cpu_relax(); /* Wait for the ring to empty */
1964
STOP_DEPCA; /* Temporarily stop the depca. */
1965
depca_init_ring(dev); /* Initialize the descriptor rings */
1966
lp->init_block.mode |= PROM; /* Set promiscuous mode */
1968
LoadCSRs(dev); /* Reload CSR3 */
1969
InitRestartDepca(dev); /* Resume normal operation. */
1970
netif_start_queue(dev); /* Unlock the TX ring */
1973
case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1974
if (!capable(CAP_NET_ADMIN))
1976
netif_stop_queue(dev);
1977
while (lp->tx_old != lp->tx_new)
1978
cpu_relax(); /* Wait for the ring to empty */
1980
STOP_DEPCA; /* Temporarily stop the depca. */
1981
depca_init_ring(dev); /* Initialize the descriptor rings */
1982
lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1984
LoadCSRs(dev); /* Reload CSR3 */
1985
InitRestartDepca(dev); /* Resume normal operation. */
1986
netif_start_queue(dev); /* Unlock the TX ring */
1989
case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1990
if(!capable(CAP_NET_ADMIN))
1992
printk("%s: Boo!\n", dev->name);
1995
case DEPCA_GET_MCA: /* Get the multicast address table */
1996
ioc->len = (HASH_TABLE_LEN >> 3);
1997
if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2001
case DEPCA_SET_MCA: /* Set a multicast address */
2002
if (!capable(CAP_NET_ADMIN))
2004
if (ioc->len >= HASH_TABLE_LEN)
2006
if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2008
set_multicast_list(dev);
2011
case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2012
if (!capable(CAP_NET_ADMIN))
2014
set_multicast_list(dev);
2017
case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2018
if (!capable(CAP_NET_ADMIN))
2020
set_multicast_list(dev);
2023
case DEPCA_GET_STATS: /* Get the driver statistics */
2024
ioc->len = sizeof(lp->pktStats);
2025
buf = kmalloc(ioc->len, GFP_KERNEL);
2028
spin_lock_irqsave(&lp->lock, flags);
2029
memcpy(buf, &lp->pktStats, ioc->len);
2030
spin_unlock_irqrestore(&lp->lock, flags);
2031
if (copy_to_user(ioc->data, buf, ioc->len))
2036
case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2037
if (!capable(CAP_NET_ADMIN))
2039
spin_lock_irqsave(&lp->lock, flags);
2040
memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2041
spin_unlock_irqrestore(&lp->lock, flags);
2044
case DEPCA_GET_REG: /* Get the DEPCA Registers */
2046
tmp.sval[i++] = inw(DEPCA_NICSR);
2047
outw(CSR0, DEPCA_ADDR); /* status register */
2048
tmp.sval[i++] = inw(DEPCA_DATA);
2049
memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2050
ioc->len = i + sizeof(struct depca_init);
2051
if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2062
static int __init depca_module_init (void)
2067
err = mca_register_driver(&depca_mca_driver);
2072
err = eisa_driver_register(&depca_eisa_driver);
2076
err = platform_driver_register(&depca_isa_driver);
2080
depca_platform_probe();
2085
eisa_driver_unregister(&depca_eisa_driver);
2089
mca_unregister_driver(&depca_mca_driver);
2095
static void __exit depca_module_exit (void)
2099
mca_unregister_driver (&depca_mca_driver);
2102
eisa_driver_unregister (&depca_eisa_driver);
2104
platform_driver_unregister (&depca_isa_driver);
2106
for (i = 0; depca_io_ports[i].iobase; i++) {
2107
if (depca_io_ports[i].device) {
2108
depca_io_ports[i].device->dev.platform_data = NULL;
2109
platform_device_unregister (depca_io_ports[i].device);
2110
depca_io_ports[i].device = NULL;
2115
module_init (depca_module_init);
2116
module_exit (depca_module_exit);
added
removed
drivers/net/depca.c
