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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>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +0400240#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241#include <linux/string.h>
242#include <linux/errno.h>
243#include <linux/ioport.h>
244#include <linux/slab.h>
245#include <linux/interrupt.h>
246#include <linux/delay.h>
247#include <linux/init.h>
248#include <linux/crc32.h>
249#include <linux/netdevice.h>
250#include <linux/etherdevice.h>
251#include <linux/skbuff.h>
252#include <linux/time.h>
253#include <linux/types.h>
254#include <linux/unistd.h>
255#include <linux/ctype.h>
256#include <linux/moduleparam.h>
Russell Kingd052d1b2005-10-29 19:07:23 +0100257#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258#include <linux/bitops.h>
259
260#include <asm/uaccess.h>
261#include <asm/io.h>
262#include <asm/dma.h>
263
264#ifdef CONFIG_MCA
265#include <linux/mca.h>
266#endif
267
268#ifdef CONFIG_EISA
269#include <linux/eisa.h>
270#endif
271
272#include "depca.h"
273
274static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
275
276#ifdef DEPCA_DEBUG
277static int depca_debug = DEPCA_DEBUG;
278#else
279static int depca_debug = 1;
280#endif
281
282#define DEPCA_NDA 0xffe0 /* No Device Address */
283
284#define TX_TIMEOUT (1*HZ)
285
286/*
287** Ethernet PROM defines
288*/
289#define PROBE_LENGTH 32
290#define ETH_PROM_SIG 0xAA5500FFUL
291
292/*
293** Set the number of Tx and Rx buffers. Ensure that the memory requested
294** here is <= to the amount of shared memory set up by the board switches.
295** The number of descriptors MUST BE A POWER OF 2.
296**
297** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
298*/
299#define NUM_RX_DESC 8 /* Number of RX descriptors */
300#define NUM_TX_DESC 8 /* Number of TX descriptors */
301#define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
302#define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
303
304/*
305** EISA bus defines
306*/
307#define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
308
309/*
310** ISA Bus defines
311*/
312#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
313#define DEPCA_TOTAL_SIZE 0x10
314
315static struct {
316 u_long iobase;
317 struct platform_device *device;
318} depca_io_ports[] = {
319 { 0x300, NULL },
320 { 0x200, NULL },
321 { 0 , NULL },
322};
323
324/*
325** Name <-> Adapter mapping
326*/
327#define DEPCA_SIGNATURE {"DEPCA",\
328 "DE100","DE101",\
329 "DE200","DE201","DE202",\
330 "DE210","DE212",\
331 "DE422",\
332 ""}
333
334static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
335
336enum depca_type {
337 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
338};
339
340static char depca_string[] = "depca";
341
342static int depca_device_remove (struct device *device);
343
344#ifdef CONFIG_EISA
345static struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
347 { "" }
348};
349MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
350
351static int depca_eisa_probe (struct device *device);
352
353static struct eisa_driver depca_eisa_driver = {
354 .id_table = depca_eisa_ids,
355 .driver = {
356 .name = depca_string,
357 .probe = depca_eisa_probe,
358 .remove = __devexit_p (depca_device_remove)
359 }
360};
361#endif
362
363#ifdef CONFIG_MCA
364/*
365** Adapter ID for the MCA EtherWORKS DE210/212 adapter
366*/
367#define DE210_ID 0x628d
368#define DE212_ID 0x6def
369
370static short depca_mca_adapter_ids[] = {
371 DE210_ID,
372 DE212_ID,
373 0x0000
374};
375
376static char *depca_mca_adapter_name[] = {
377 "DEC EtherWORKS MC Adapter (DE210)",
378 "DEC EtherWORKS MC Adapter (DE212)",
379 NULL
380};
381
382static enum depca_type depca_mca_adapter_type[] = {
383 de210,
384 de212,
385 0
386};
387
388static int depca_mca_probe (struct device *);
389
390static struct mca_driver depca_mca_driver = {
391 .id_table = depca_mca_adapter_ids,
392 .driver = {
393 .name = depca_string,
394 .bus = &mca_bus_type,
395 .probe = depca_mca_probe,
396 .remove = __devexit_p(depca_device_remove),
397 },
398};
399#endif
400
Russell King3ae5eae2005-11-09 22:32:44 +0000401static int depca_isa_probe (struct platform_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Russell King3ae5eae2005-11-09 22:32:44 +0000403static int __devexit depca_isa_remove(struct platform_device *pdev)
404{
405 return depca_device_remove(&pdev->dev);
406}
407
408static struct platform_driver depca_isa_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 .probe = depca_isa_probe,
Russell King3ae5eae2005-11-09 22:32:44 +0000410 .remove = __devexit_p(depca_isa_remove),
411 .driver = {
412 .name = depca_string,
413 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414};
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416/*
417** Miscellaneous info...
418*/
419#define DEPCA_STRLEN 16
420
421/*
422** Memory Alignment. Each descriptor is 4 longwords long. To force a
423** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
424** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400425** and hence the RX descriptor ring's first entry.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426*/
427#define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
428#define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
429#define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
430
431/*
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400432** The DEPCA Rx and Tx ring descriptors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433*/
434struct depca_rx_desc {
435 volatile s32 base;
436 s16 buf_length; /* This length is negative 2's complement! */
437 s16 msg_length; /* This length is "normal". */
438};
439
440struct depca_tx_desc {
441 volatile s32 base;
442 s16 length; /* This length is negative 2's complement! */
443 s16 misc; /* Errors and TDR info */
444};
445
446#define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
447 to LANCE memory address space */
448
449/*
450** The Lance initialization block, described in databook, in common memory.
451*/
452struct depca_init {
453 u16 mode; /* Mode register */
454 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
455 u8 mcast_table[8]; /* Multicast Hash Table. */
456 u32 rx_ring; /* Rx ring base pointer & ring length */
457 u32 tx_ring; /* Tx ring base pointer & ring length */
458};
459
460#define DEPCA_PKT_STAT_SZ 16
461#define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
462 increase DEPCA_PKT_STAT_SZ */
463struct depca_private {
464 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
465 enum depca_type adapter; /* Adapter type */
466 enum {
467 DEPCA_BUS_MCA = 1,
468 DEPCA_BUS_ISA,
469 DEPCA_BUS_EISA,
470 } depca_bus; /* type of bus */
471 struct depca_init init_block; /* Shadow Initialization block */
472/* CPU address space fields */
473 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
474 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
475 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
477 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
478 u_long mem_start; /* Bus address of device RAM (before remap) */
479 u_long mem_len; /* device memory size */
480/* Device address space fields */
481 u_long device_ram_start; /* Start of RAM in device addr space */
482/* Offsets used in both address spaces */
483 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
484 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
485 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
486/* Kernel-only (not device) fields */
487 int rx_new, tx_new; /* The next free ring entry */
488 int rx_old, tx_old; /* The ring entries to be free()ed. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 spinlock_t lock;
490 struct { /* Private stats counters */
491 u32 bins[DEPCA_PKT_STAT_SZ];
492 u32 unicast;
493 u32 multicast;
494 u32 broadcast;
495 u32 excessive_collisions;
496 u32 tx_underruns;
497 u32 excessive_underruns;
498 } pktStats;
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 */
503};
504
505/*
506** The transmit ring full condition is described by the tx_old and tx_new
507** pointers by:
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)
511*/
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)
515
516/*
517** Public Functions
518*/
519static int depca_open(struct net_device *dev);
Stephen Hemminger613573252009-08-31 19:50:58 +0000520static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
521 struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100522static irqreturn_t depca_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523static int depca_close(struct net_device *dev);
524static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
525static void depca_tx_timeout(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526static void set_multicast_list(struct net_device *dev);
527
528/*
529** Private functions
530*/
531static void depca_init_ring(struct net_device *dev);
532static int depca_rx(struct net_device *dev);
533static int depca_tx(struct net_device *dev);
534
535static void LoadCSRs(struct net_device *dev);
536static int InitRestartDepca(struct net_device *dev);
537static int DepcaSignature(char *name, u_long paddr);
538static int DevicePresent(u_long ioaddr);
539static int get_hw_addr(struct net_device *dev);
540static void SetMulticastFilter(struct net_device *dev);
541static int load_packet(struct net_device *dev, struct sk_buff *skb);
542static void depca_dbg_open(struct net_device *dev);
543
544static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
545static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
546static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
547static u_char *depca_irq;
548
549static int irq;
550static int io;
551static char *adapter_name;
552static int mem; /* For loadable module assignment
553 use insmod mem=0x????? .... */
554module_param (irq, int, 0);
555module_param (io, int, 0);
556module_param (adapter_name, charp, 0);
557module_param (mem, int, 0);
558MODULE_PARM_DESC(irq, "DEPCA IRQ number");
559MODULE_PARM_DESC(io, "DEPCA I/O base address");
560MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
561MODULE_PARM_DESC(mem, "DEPCA shared memory address");
562MODULE_LICENSE("GPL");
563
564/*
565** Miscellaneous defines...
566*/
567#define STOP_DEPCA \
568 outw(CSR0, DEPCA_ADDR);\
569 outw(STOP, DEPCA_DATA)
570
Stephen Hemminger361bc032009-03-26 15:11:37 +0000571static 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,
581};
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583static int __init depca_hw_init (struct net_device *dev, struct device *device)
584{
585 struct depca_private *lp;
586 int i, j, offset, netRAM, mem_len, status = 0;
587 s16 nicsr;
588 u_long ioaddr;
589 u_long mem_start;
590
591 /*
592 * We are now supposed to enter this function with the
593 * following fields filled with proper values :
594 *
595 * dev->base_addr
596 * lp->mem_start
597 * lp->depca_bus
598 * lp->adapter
599 *
600 * dev->irq can be set if known from device configuration (on
601 * MCA or EISA) or module option. Otherwise, it will be auto
602 * detected.
603 */
604
605 ioaddr = dev->base_addr;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 STOP_DEPCA;
608
609 nicsr = inb(DEPCA_NICSR);
610 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
611 outb(nicsr, DEPCA_NICSR);
612
613 if (inw(DEPCA_DATA) != STOP) {
614 return -ENXIO;
615 }
616
Wang Chen4cf16532008-11-12 23:38:14 -0800617 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 mem_start = lp->mem_start;
619
620 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
621 return -ENXIO;
622
Kay Sieversc2313552009-03-24 16:38:22 -0700623 printk("%s: %s at 0x%04lx",
624 dev_name(device), depca_signature[lp->adapter], ioaddr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 switch (lp->depca_bus) {
627#ifdef CONFIG_MCA
628 case DEPCA_BUS_MCA:
629 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
630 break;
631#endif
632
633#ifdef CONFIG_EISA
634 case DEPCA_BUS_EISA:
635 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
636 break;
637#endif
638
639 case DEPCA_BUS_ISA:
640 break;
641
642 default:
643 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
644 return -ENXIO;
645 }
646
647 printk(", h/w address ");
648 status = get_hw_addr(dev);
Johannes Berge1749612008-10-27 15:59:26 -0700649 printk("%pM", dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 if (status != 0) {
651 printk(" which has an Ethernet PROM CRC error.\n");
652 return -ENXIO;
653 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655 /* Set up the maximum amount of network RAM(kB) */
656 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
657 if ((nicsr & _128KB) && (lp->adapter == de422))
658 netRAM = 128;
659
660 /* Shared Memory Base Address */
661 if (nicsr & BUF) {
662 nicsr &= ~BS; /* DEPCA RAM in top 32k */
663 netRAM -= 32;
664
665 /* Only EISA/ISA needs start address to be re-computed */
666 if (lp->depca_bus != DEPCA_BUS_MCA)
667 mem_start += 0x8000;
668 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 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)))
671 > (netRAM << 10)) {
672 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
673 return -ENXIO;
674 }
675
676 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
677
678 /* Enable the shadow RAM. */
679 if (lp->adapter != DEPCA) {
680 nicsr |= SHE;
681 outb(nicsr, DEPCA_NICSR);
682 }
683
684 spin_lock_init(&lp->lock);
685 sprintf(lp->adapter_name, "%s (%s)",
Kay Sieversc2313552009-03-24 16:38:22 -0700686 depca_signature[lp->adapter], dev_name(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 status = -EBUSY;
688
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");
692 goto out_priv;
693 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 status = -EIO;
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");
699 goto out1;
700 }
701
702 lp->mem_start = mem_start;
703 lp->mem_len = mem_len;
704 lp->device_ram_start = mem_start & LA_MASK;
705
706 offset = 0;
707 offset += sizeof(struct depca_init);
708
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;
713
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;
717
718 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
719
720 lp->buffs_offset = offset;
721
722 /* Finish initialising the ring information. */
723 lp->rxRingMask = NUM_RX_DESC - 1;
724 lp->txRingMask = NUM_TX_DESC - 1;
725
726 /* Calculate Tx/Rx RLEN size for the descriptors. */
727 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
728 j >>= 1;
729 }
730 lp->rx_rlen = (s32) (i << 29);
731 for (i = 0, j = lp->txRingMask; j > 0; i++) {
732 j >>= 1;
733 }
734 lp->tx_rlen = (s32) (i << 29);
735
736 /* Load the initialisation block */
737 depca_init_ring(dev);
738
739 /* Initialise the control and status registers */
740 LoadCSRs(dev);
741
742 /* Enable DEPCA board interrupts for autoprobing */
743 nicsr = ((nicsr & ~IM) | IEN);
744 outb(nicsr, DEPCA_NICSR);
745
746 /* To auto-IRQ we enable the initialization-done and DMA err,
747 interrupts. For now we will always get a DMA error. */
748 if (dev->irq < 2) {
749 unsigned char irqnum;
750 unsigned long irq_mask, delay;
751
752 irq_mask = probe_irq_on();
753
754 /* Assign the correct irq list */
755 switch (lp->adapter) {
756 case DEPCA:
757 case de100:
758 case de101:
759 depca_irq = de1xx_irq;
760 break;
761 case de200:
762 case de201:
763 case de202:
764 case de210:
765 case de212:
766 depca_irq = de2xx_irq;
767 break;
768 case de422:
769 depca_irq = de422_irq;
770 break;
771
772 default:
773 break; /* Not reached */
774 }
775
776 /* Trigger an initialization just for the interrupt. */
777 outw(INEA | INIT, DEPCA_DATA);
778
779 delay = jiffies + HZ/50;
780 while (time_before(jiffies, delay))
781 yield();
782
783 irqnum = probe_irq_off(irq_mask);
784
785 status = -ENXIO;
786 if (!irqnum) {
787 printk(" and failed to detect IRQ line.\n");
788 goto out2;
789 } else {
790 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
791 if (irqnum == depca_irq[i]) {
792 dev->irq = irqnum;
793 printk(" and uses IRQ%d.\n", dev->irq);
794 }
795
796 if (!dev->irq) {
797 printk(" but incorrect IRQ line detected.\n");
798 goto out2;
799 }
800 }
801 } else {
802 printk(" and assigned IRQ%d.\n", dev->irq);
803 }
804
805 if (depca_debug > 1) {
806 printk(version);
807 }
808
809 /* The DEPCA-specific entries in the device structure. */
Stephen Hemminger361bc032009-03-26 15:11:37 +0000810 dev->netdev_ops = &depca_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 dev->watchdog_timeo = TX_TIMEOUT;
812
813 dev->mem_start = 0;
814
Greg Kroah-Hartman1aec5bd2009-04-30 12:19:31 +0000815 dev_set_drvdata(device, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 SET_NETDEV_DEV (dev, device);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 status = register_netdev(dev);
819 if (status == 0)
820 return 0;
821out2:
822 iounmap(lp->sh_mem);
823out1:
824 release_mem_region (mem_start, mem_len);
825out_priv:
826 return status;
827}
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
830static int depca_open(struct net_device *dev)
831{
Wang Chen4cf16532008-11-12 23:38:14 -0800832 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 u_long ioaddr = dev->base_addr;
834 s16 nicsr;
835 int status = 0;
836
837 STOP_DEPCA;
838 nicsr = inb(DEPCA_NICSR);
839
840 /* Make sure the shadow RAM is enabled */
841 if (lp->adapter != DEPCA) {
842 nicsr |= SHE;
843 outb(nicsr, DEPCA_NICSR);
844 }
845
846 /* Re-initialize the DEPCA... */
847 depca_init_ring(dev);
848 LoadCSRs(dev);
849
850 depca_dbg_open(dev);
851
Joe Perchesa0607fd2009-11-18 23:29:17 -0800852 if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
854 status = -EAGAIN;
855 } else {
856
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);
861
862 netif_start_queue(dev);
863
864 status = InitRestartDepca(dev);
865
866 if (depca_debug > 1) {
867 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
868 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
869 }
870 }
871 return status;
872}
873
874/* Initialize the lance Rx and Tx descriptor rings. */
875static void depca_init_ring(struct net_device *dev)
876{
Wang Chen4cf16532008-11-12 23:38:14 -0800877 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 u_int i;
879 u_long offset;
880
881 /* Lock out other processes whilst setting up the hardware */
882 netif_stop_queue(dev);
883
884 lp->rx_new = lp->tx_new = 0;
885 lp->rx_old = lp->tx_old = 0;
886
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;
893 }
894
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;
899 }
900
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;
904
905 SetMulticastFilter(dev);
906
907 for (i = 0; i < ETH_ALEN; i++) {
908 lp->init_block.phys_addr[i] = dev->dev_addr[i];
909 }
910
911 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
912}
913
914
915static void depca_tx_timeout(struct net_device *dev)
916{
917 u_long ioaddr = dev->base_addr;
918
919 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
920
921 STOP_DEPCA;
922 depca_init_ring(dev);
923 LoadCSRs(dev);
924 dev->trans_start = jiffies;
925 netif_wake_queue(dev);
926 InitRestartDepca(dev);
927}
928
929
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400930/*
931** Writes a socket buffer to TX descriptor ring and starts transmission
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932*/
Stephen Hemminger613573252009-08-31 19:50:58 +0000933static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
934 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935{
Wang Chen4cf16532008-11-12 23:38:14 -0800936 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 u_long ioaddr = dev->base_addr;
938 int status = 0;
939
940 /* Transmitter timeout, serious problems. */
941 if (skb->len < 1)
942 goto out;
943
Herbert Xu5b057c62006-06-23 02:06:41 -0700944 if (skb_padto(skb, ETH_ZLEN))
945 goto out;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 netif_stop_queue(dev);
948
949 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950 status = load_packet(dev, skb);
951
952 if (!status) {
953 /* Trigger an immediate send demand. */
954 outw(CSR0, DEPCA_ADDR);
955 outw(INEA | TDMD, DEPCA_DATA);
956
957 dev->trans_start = jiffies;
958 dev_kfree_skb(skb);
959 }
960 if (TX_BUFFS_AVAIL)
961 netif_start_queue(dev);
962 } else
Patrick McHardy5b548142009-06-12 06:22:29 +0000963 status = NETDEV_TX_LOCKED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
965 out:
966 return status;
967}
968
969/*
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400970** The DEPCA interrupt handler.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971*/
David Howells7d12e782006-10-05 14:55:46 +0100972static irqreturn_t depca_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973{
974 struct net_device *dev = dev_id;
975 struct depca_private *lp;
976 s16 csr0, nicsr;
977 u_long ioaddr;
978
979 if (dev == NULL) {
980 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
981 return IRQ_NONE;
982 }
983
Wang Chen4cf16532008-11-12 23:38:14 -0800984 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 ioaddr = dev->base_addr;
986
987 spin_lock(&lp->lock);
988
989 /* mask the DEPCA board interrupts and turn on the LED */
990 nicsr = inb(DEPCA_NICSR);
991 nicsr |= (IM | LED);
992 outb(nicsr, DEPCA_NICSR);
993
994 outw(CSR0, DEPCA_ADDR);
995 csr0 = inw(DEPCA_DATA);
996
997 /* Acknowledge all of the current interrupt sources ASAP. */
998 outw(csr0 & INTE, DEPCA_DATA);
999
1000 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1001 depca_rx(dev);
1002
1003 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1004 depca_tx(dev);
1005
1006 /* Any resources available? */
1007 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1008 netif_wake_queue(dev);
1009 }
1010
1011 /* Unmask the DEPCA board interrupts and turn off the LED */
1012 nicsr = (nicsr & ~IM & ~LED);
1013 outb(nicsr, DEPCA_NICSR);
1014
1015 spin_unlock(&lp->lock);
1016 return IRQ_HANDLED;
1017}
1018
1019/* Called with lp->lock held */
1020static int depca_rx(struct net_device *dev)
1021{
Wang Chen4cf16532008-11-12 23:38:14 -08001022 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 int i, entry;
1024 s32 status;
1025
1026 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1027 status = readl(&lp->rx_ring[entry].base) >> 16;
1028 if (status & R_STP) { /* Remember start of frame */
1029 lp->rx_old = entry;
1030 }
1031 if (status & R_ENP) { /* Valid frame status */
1032 if (status & R_ERR) { /* There was an error. */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001033 dev->stats.rx_errors++; /* Update the error stats. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 if (status & R_FRAM)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001035 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 if (status & R_OFLO)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001037 dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 if (status & R_CRC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001039 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 if (status & R_BUFF)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001041 dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 } else {
1043 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1044 struct sk_buff *skb;
1045
1046 skb = dev_alloc_skb(pkt_len + 2);
1047 if (skb != NULL) {
1048 unsigned char *buf;
1049 skb_reserve(skb, 2); /* 16 byte align the IP header */
1050 buf = skb_put(skb, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 if (entry < lp->rx_old) { /* Wrapped buffer */
1052 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1053 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1054 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1055 } else { /* Linear buffer */
1056 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1057 }
1058
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001059 /*
1060 ** Notify the upper protocol layers that there is another
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 ** packet to handle
1062 */
1063 skb->protocol = eth_type_trans(skb, dev);
1064 netif_rx(skb);
1065
1066 /*
1067 ** Update stats
1068 */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001069 dev->stats.rx_packets++;
1070 dev->stats.rx_bytes += pkt_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1072 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1073 lp->pktStats.bins[i]++;
1074 i = DEPCA_PKT_STAT_SZ;
1075 }
1076 }
1077 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1078 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1079 lp->pktStats.broadcast++;
1080 } else {
1081 lp->pktStats.multicast++;
1082 }
1083 } 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])) {
1084 lp->pktStats.unicast++;
1085 }
1086
1087 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1088 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1089 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1090 }
1091 } else {
1092 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001093 dev->stats.rx_dropped++; /* Really, deferred. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 break;
1095 }
1096 }
1097 /* Change buffer ownership for this last frame, back to the adapter */
1098 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1099 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1100 }
1101 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1102 }
1103
1104 /*
1105 ** Update entry information
1106 */
1107 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1108 }
1109
1110 return 0;
1111}
1112
1113/*
1114** Buffer sent - check for buffer errors.
1115** Called with lp->lock held
1116*/
1117static int depca_tx(struct net_device *dev)
1118{
Wang Chen4cf16532008-11-12 23:38:14 -08001119 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 int entry;
1121 s32 status;
1122 u_long ioaddr = dev->base_addr;
1123
1124 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1125 status = readl(&lp->tx_ring[entry].base) >> 16;
1126
1127 if (status < 0) { /* Packet not yet sent! */
1128 break;
1129 } else if (status & T_ERR) { /* An error occurred. */
1130 status = readl(&lp->tx_ring[entry].misc);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001131 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 if (status & TMD3_RTRY)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001133 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 if (status & TMD3_LCAR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001135 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 if (status & TMD3_LCOL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001137 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 if (status & TMD3_UFLO)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001139 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1141 /* Trigger an immediate send demand. */
1142 outw(CSR0, DEPCA_ADDR);
1143 outw(INEA | TDMD, DEPCA_DATA);
1144 }
1145 } else if (status & (T_MORE | T_ONE)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001146 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 } else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001148 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 }
1150
1151 /* Update all the pointers */
1152 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1153 }
1154
1155 return 0;
1156}
1157
1158static int depca_close(struct net_device *dev)
1159{
Wang Chen4cf16532008-11-12 23:38:14 -08001160 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 s16 nicsr;
1162 u_long ioaddr = dev->base_addr;
1163
1164 netif_stop_queue(dev);
1165
1166 outw(CSR0, DEPCA_ADDR);
1167
1168 if (depca_debug > 1) {
1169 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1170 }
1171
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001172 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 ** We stop the DEPCA here -- it occasionally polls
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001174 ** memory if we don't.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 */
1176 outw(STOP, DEPCA_DATA);
1177
1178 /*
1179 ** Give back the ROM in case the user wants to go to DOS
1180 */
1181 if (lp->adapter != DEPCA) {
1182 nicsr = inb(DEPCA_NICSR);
1183 nicsr &= ~SHE;
1184 outb(nicsr, DEPCA_NICSR);
1185 }
1186
1187 /*
1188 ** Free the associated irq
1189 */
1190 free_irq(dev->irq, dev);
1191 return 0;
1192}
1193
1194static void LoadCSRs(struct net_device *dev)
1195{
Wang Chen4cf16532008-11-12 23:38:14 -08001196 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 u_long ioaddr = dev->base_addr;
1198
1199 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1200 outw((u16) lp->device_ram_start, DEPCA_DATA);
1201 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1202 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1203 outw(CSR3, DEPCA_ADDR); /* ALE control */
1204 outw(ACON, DEPCA_DATA);
1205
1206 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1207
1208 return;
1209}
1210
1211static int InitRestartDepca(struct net_device *dev)
1212{
Wang Chen4cf16532008-11-12 23:38:14 -08001213 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 u_long ioaddr = dev->base_addr;
1215 int i, status = 0;
1216
1217 /* Copy the shadow init_block to shared memory */
1218 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1219
1220 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1221 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1222
1223 /* wait for lance to complete initialisation */
1224 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1225
1226 if (i != 100) {
1227 /* clear IDON by writing a "1", enable interrupts and start lance */
1228 outw(IDON | INEA | STRT, DEPCA_DATA);
1229 if (depca_debug > 2) {
1230 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1231 }
1232 } else {
1233 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1234 status = -1;
1235 }
1236
1237 return status;
1238}
1239
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240/*
1241** Set or clear the multicast filter for this adaptor.
1242*/
1243static void set_multicast_list(struct net_device *dev)
1244{
Wang Chen4cf16532008-11-12 23:38:14 -08001245 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 u_long ioaddr = dev->base_addr;
1247
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001248 netif_stop_queue(dev);
1249 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001251 STOP_DEPCA; /* Temporarily stop the depca. */
1252 depca_init_ring(dev); /* Initialize the descriptor rings */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001254 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1255 lp->init_block.mode |= PROM;
1256 } else {
1257 SetMulticastFilter(dev);
1258 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 }
Eric Sesterhenn107ce6d2006-10-10 14:33:28 -07001260
1261 LoadCSRs(dev); /* Reload CSR3 */
1262 InitRestartDepca(dev); /* Resume normal operation. */
1263 netif_start_queue(dev); /* Unlock the TX ring */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264}
1265
1266/*
1267** Calculate the hash code and update the logical address filter
1268** from a list of ethernet multicast addresses.
1269** Big endian crc one liner is mine, all mine, ha ha ha ha!
1270** LANCE calculates its hash codes big endian.
1271*/
1272static void SetMulticastFilter(struct net_device *dev)
1273{
Wang Chen4cf16532008-11-12 23:38:14 -08001274 struct depca_private *lp = netdev_priv(dev);
Jiri Pirkobf473a22010-02-17 22:55:07 +00001275 struct dev_mc_list *dmi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 char *addrs;
1277 int i, j, bit, byte;
1278 u16 hashcode;
1279 u32 crc;
1280
1281 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1282 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1283 lp->init_block.mcast_table[i] = (char) 0xff;
1284 }
1285 } else {
1286 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1287 lp->init_block.mcast_table[i] = 0;
1288 }
1289 /* Add multicast addresses */
Jiri Pirkoe1d44472010-02-17 11:09:31 +00001290 netdev_for_each_mc_addr(dmi, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 addrs = dmi->dmi_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 if ((*addrs & 0x01) == 1) { /* multicast address? */
1293 crc = ether_crc(ETH_ALEN, addrs);
1294 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1295 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1296 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1297 }
1298
1299
1300 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1301 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1302 lp->init_block.mcast_table[byte] |= bit;
1303 }
1304 }
1305 }
1306
1307 return;
1308}
1309
1310static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1311{
1312 int status = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1315 status = -EBUSY;
1316 goto out;
1317 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001318
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 if (DevicePresent(ioaddr)) {
1320 status = -ENODEV;
1321 goto out_release;
1322 }
1323
1324 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1325 status = -ENOMEM;
1326 goto out_release;
1327 }
1328
1329 return 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001330
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 out_release:
1332 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1333 out:
1334 return status;
1335}
1336
1337#ifdef CONFIG_MCA
1338/*
1339** Microchannel bus I/O device probe
1340*/
1341static int __init depca_mca_probe(struct device *device)
1342{
1343 unsigned char pos[2];
1344 unsigned char where;
1345 unsigned long iobase, mem_start;
1346 int irq, err;
1347 struct mca_device *mdev = to_mca_device (device);
1348 struct net_device *dev;
1349 struct depca_private *lp;
1350
1351 /*
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001352 ** Search for the adapter. If an address has been given, search
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 ** specifically for the card at that address. Otherwise find the
1354 ** first card in the system.
1355 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001356
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 pos[0] = mca_device_read_stored_pos(mdev, 2);
1358 pos[1] = mca_device_read_stored_pos(mdev, 3);
1359
1360 /*
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001361 ** IO of card is handled by bits 1 and 2 of pos0.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 **
1363 ** bit2 bit1 IO
1364 ** 0 0 0x2c00
1365 ** 0 1 0x2c10
1366 ** 1 0 0x2c20
1367 ** 1 1 0x2c30
1368 */
1369 where = (pos[0] & 6) >> 1;
1370 iobase = 0x2c00 + (0x10 * where);
1371
1372 /*
1373 ** Found the adapter we were looking for. Now start setting it up.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001374 **
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1376 ** of pos1. Bits are as follows (from the ADF file):
1377 **
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001378 ** Bits
1379 ** 3 2 1 0 IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 ** --------------------
1381 ** 0 0 1 0 5
1382 ** 0 0 0 1 9
1383 ** 0 1 0 0 10
1384 ** 1 0 0 0 11
1385 */
1386 where = pos[1] & 0x0f;
1387 switch (where) {
1388 case 1:
1389 irq = 9;
1390 break;
1391 case 2:
1392 irq = 5;
1393 break;
1394 case 4:
1395 irq = 10;
1396 break;
1397 case 8:
1398 irq = 11;
1399 break;
1400 default:
Eric Sesterhenn6a6bbd22006-03-22 22:49:48 +01001401 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 return -EINVAL;
1403 }
1404
1405 /*
1406 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1407 ** They are mapped as follows:
1408 **
1409 ** Bit
1410 ** 5 4 3 Memory Addresses
1411 ** 0 0 0 C0000-CFFFF (64K)
1412 ** 1 0 0 C8000-CFFFF (32K)
1413 ** 0 0 1 D0000-DFFFF (64K)
1414 ** 1 0 1 D8000-DFFFF (32K)
1415 ** 0 1 0 E0000-EFFFF (64K)
1416 ** 1 1 0 E8000-EFFFF (32K)
1417 */
1418 where = (pos[0] & 0x18) >> 3;
1419 mem_start = 0xc0000 + (where * 0x10000);
1420 if (pos[0] & 0x20) {
1421 mem_start += 0x8000;
1422 }
1423
1424 /* claim the slot */
1425 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1426 sizeof(mdev->name));
1427 mca_device_set_claim(mdev, 1);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001428
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 /*
1430 ** Get everything allocated and initialized... (almost just
1431 ** like the ISA and EISA probes)
1432 */
1433 irq = mca_device_transform_irq(mdev, irq);
1434 iobase = mca_device_transform_ioport(mdev, iobase);
1435
1436 if ((err = depca_common_init (iobase, &dev)))
1437 goto out_unclaim;
1438
1439 dev->irq = irq;
1440 dev->base_addr = iobase;
Wang Chen4cf16532008-11-12 23:38:14 -08001441 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 lp->depca_bus = DEPCA_BUS_MCA;
1443 lp->adapter = depca_mca_adapter_type[mdev->index];
1444 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001445
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 if ((err = depca_hw_init(dev, device)))
1447 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001448
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 return 0;
1450
1451 out_free:
1452 free_netdev (dev);
1453 release_region (iobase, DEPCA_TOTAL_SIZE);
1454 out_unclaim:
1455 mca_device_set_claim(mdev, 0);
1456
1457 return err;
1458}
1459#endif
1460
1461/*
1462** ISA bus I/O device probe
1463*/
1464
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465static void __init depca_platform_probe (void)
1466{
1467 int i;
1468 struct platform_device *pldev;
1469
1470 for (i = 0; depca_io_ports[i].iobase; i++) {
1471 depca_io_ports[i].device = NULL;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001472
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 /* if an address has been specified on the command
1474 * line, use it (if valid) */
1475 if (io && io != depca_io_ports[i].iobase)
1476 continue;
Russell King5d994b72005-11-05 21:20:21 +00001477
1478 pldev = platform_device_alloc(depca_string, i);
1479 if (!pldev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 continue;
1481
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 depca_io_ports[i].device = pldev;
1484
Russell King5d994b72005-11-05 21:20:21 +00001485 if (platform_device_add(pldev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 depca_io_ports[i].device = NULL;
Andrea Righid91c0882007-04-24 12:40:57 -04001487 pldev->dev.platform_data = NULL;
1488 platform_device_put(pldev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 continue;
1490 }
1491
1492 if (!pldev->dev.driver) {
1493 /* The driver was not bound to this device, there was
1494 * no hardware at this address. Unregister it, as the
1495 * release fuction will take care of freeing the
1496 * allocated structure */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001497
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 depca_io_ports[i].device = NULL;
Russell King5d994b72005-11-05 21:20:21 +00001499 pldev->dev.platform_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 platform_device_unregister (pldev);
1501 }
1502 }
1503}
1504
1505static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1506{
1507 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1508 enum depca_type adapter = unknown;
1509 int i;
1510
1511 for (i = 0; mem_base[i]; i++) {
1512 *mem_start = mem ? mem : mem_base[i];
1513 adapter = DepcaSignature (adapter_name, *mem_start);
1514 if (adapter != unknown)
1515 break;
1516 }
1517
1518 return adapter;
1519}
1520
Russell King3ae5eae2005-11-09 22:32:44 +00001521static int __init depca_isa_probe (struct platform_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522{
1523 struct net_device *dev;
1524 struct depca_private *lp;
1525 u_long ioaddr, mem_start = 0;
1526 enum depca_type adapter = unknown;
1527 int status = 0;
1528
Russell King3ae5eae2005-11-09 22:32:44 +00001529 ioaddr = (u_long) device->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
1531 if ((status = depca_common_init (ioaddr, &dev)))
1532 goto out;
1533
1534 adapter = depca_shmem_probe (&mem_start);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001535
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536 if (adapter == unknown) {
1537 status = -ENODEV;
1538 goto out_free;
1539 }
1540
1541 dev->base_addr = ioaddr;
1542 dev->irq = irq; /* Use whatever value the user gave
1543 * us, and 0 if he didn't. */
Wang Chen4cf16532008-11-12 23:38:14 -08001544 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 lp->depca_bus = DEPCA_BUS_ISA;
1546 lp->adapter = adapter;
1547 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001548
Russell King3ae5eae2005-11-09 22:32:44 +00001549 if ((status = depca_hw_init(dev, &device->dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 return 0;
1553
1554 out_free:
1555 free_netdev (dev);
1556 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1557 out:
1558 return status;
1559}
1560
1561/*
1562** EISA callbacks from sysfs.
1563*/
1564
1565#ifdef CONFIG_EISA
1566static int __init depca_eisa_probe (struct device *device)
1567{
Ingo Molnar99da1a82008-11-25 17:00:39 -08001568 enum depca_type adapter = unknown;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 struct eisa_device *edev;
1570 struct net_device *dev;
1571 struct depca_private *lp;
1572 u_long ioaddr, mem_start;
1573 int status = 0;
1574
1575 edev = to_eisa_device (device);
1576 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1577
1578 if ((status = depca_common_init (ioaddr, &dev)))
1579 goto out;
1580
1581 /* It would have been nice to get card configuration from the
1582 * card. Unfortunately, this register is write-only (shares
1583 * it's address with the ethernet prom)... As we don't parse
1584 * the EISA configuration structures (yet... :-), just rely on
1585 * the ISA probing to sort it out... */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001586
Ingo Molnar99da1a82008-11-25 17:00:39 -08001587 adapter = depca_shmem_probe (&mem_start);
1588 if (adapter == unknown) {
1589 status = -ENODEV;
1590 goto out_free;
1591 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
1593 dev->base_addr = ioaddr;
1594 dev->irq = irq;
Wang Chen4cf16532008-11-12 23:38:14 -08001595 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 lp->depca_bus = DEPCA_BUS_EISA;
1597 lp->adapter = edev->id.driver_data;
1598 lp->mem_start = mem_start;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001599
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 if ((status = depca_hw_init(dev, device)))
1601 goto out_free;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001602
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 return 0;
1604
1605 out_free:
1606 free_netdev (dev);
1607 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1608 out:
1609 return status;
1610}
1611#endif
1612
1613static int __devexit depca_device_remove (struct device *device)
1614{
1615 struct net_device *dev;
1616 struct depca_private *lp;
1617 int bus;
1618
Greg Kroah-Hartman1aec5bd2009-04-30 12:19:31 +00001619 dev = dev_get_drvdata(device);
Wang Chen4cf16532008-11-12 23:38:14 -08001620 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
1622 unregister_netdev (dev);
1623 iounmap (lp->sh_mem);
1624 release_mem_region (lp->mem_start, lp->mem_len);
1625 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1626 bus = lp->depca_bus;
1627 free_netdev (dev);
1628
1629 return 0;
1630}
1631
1632/*
1633** Look for a particular board name in the on-board Remote Diagnostics
1634** and Boot (readb) ROM. This will also give us a clue to the network RAM
1635** base address.
1636*/
1637static int __init DepcaSignature(char *name, u_long base_addr)
1638{
1639 u_int i, j, k;
1640 void __iomem *ptr;
1641 char tmpstr[16];
1642 u_long prom_addr = base_addr + 0xc000;
1643 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1644
1645 /* Can't reserve the prom region, it is already marked as
1646 * used, at least on x86. Instead, reserve a memory region a
1647 * board would certainly use. If it works, go ahead. If not,
1648 * run like hell... */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001649
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 if (!request_mem_region (mem_addr, 16, depca_string))
1651 return unknown;
1652
1653 /* Copy the first 16 bytes of ROM */
1654
1655 ptr = ioremap(prom_addr, 16);
1656 if (ptr == NULL) {
1657 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1658 return unknown;
1659 }
1660 for (i = 0; i < 16; i++) {
1661 tmpstr[i] = readb(ptr + i);
1662 }
1663 iounmap(ptr);
1664
1665 release_mem_region (mem_addr, 16);
1666
1667 /* Check if PROM contains a valid string */
1668 for (i = 0; *depca_signature[i] != '\0'; i++) {
1669 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1670 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1671 k++;
1672 } else { /* lost signature; begin search again */
1673 k = 0;
1674 }
1675 }
1676 if (k == strlen(depca_signature[i]))
1677 break;
1678 }
1679
1680 /* Check if name string is valid, provided there's no PROM */
1681 if (name && *name && (i == unknown)) {
1682 for (i = 0; *depca_signature[i] != '\0'; i++) {
1683 if (strcmp(name, depca_signature[i]) == 0)
1684 break;
1685 }
1686 }
1687
1688 return i;
1689}
1690
1691/*
1692** Look for a special sequence in the Ethernet station address PROM that
1693** is common across all DEPCA products. Note that the original DEPCA needs
1694** its ROM address counter to be initialized and enabled. Only enable
1695** if the first address octet is a 0x08 - this minimises the chances of
1696** messing around with some other hardware, but it assumes that this DEPCA
1697** card initialized itself correctly.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001698**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699** Search the Ethernet address ROM for the signature. Since the ROM address
1700** counter can start at an arbitrary point, the search must include the entire
1701** probe sequence length plus the (length_of_the_signature - 1).
1702** Stop the search IMMEDIATELY after the signature is found so that the
1703** PROM address counter is correctly positioned at the start of the
1704** ethernet address for later read out.
1705*/
1706static int __init DevicePresent(u_long ioaddr)
1707{
1708 union {
1709 struct {
1710 u32 a;
1711 u32 b;
1712 } llsig;
1713 char Sig[sizeof(u32) << 1];
1714 }
1715 dev;
1716 short sigLength = 0;
1717 s8 data;
1718 s16 nicsr;
1719 int i, j, status = 0;
1720
1721 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1722 data = inb(DEPCA_PROM); /* read data */
1723
1724 if (data == 0x08) { /* Enable counter on DEPCA */
1725 nicsr = inb(DEPCA_NICSR);
1726 nicsr |= AAC;
1727 outb(nicsr, DEPCA_NICSR);
1728 }
1729
1730 dev.llsig.a = ETH_PROM_SIG;
1731 dev.llsig.b = ETH_PROM_SIG;
1732 sigLength = sizeof(u32) << 1;
1733
1734 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1735 data = inb(DEPCA_PROM);
1736 if (dev.Sig[j] == data) { /* track signature */
1737 j++;
1738 } else { /* lost signature; begin search again */
1739 if (data == dev.Sig[0]) { /* rare case.... */
1740 j = 1;
1741 } else {
1742 j = 0;
1743 }
1744 }
1745 }
1746
1747 if (j != sigLength) {
1748 status = -ENODEV; /* search failed */
1749 }
1750
1751 return status;
1752}
1753
1754/*
1755** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1756** reason: access the upper half of the PROM with x=0; access the lower half
1757** with x=1.
1758*/
1759static int __init get_hw_addr(struct net_device *dev)
1760{
1761 u_long ioaddr = dev->base_addr;
Wang Chen4cf16532008-11-12 23:38:14 -08001762 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 int i, k, tmp, status = 0;
1764 u_short j, x, chksum;
1765
1766 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1767
1768 for (i = 0, k = 0, j = 0; j < 3; j++) {
1769 k <<= 1;
1770 if (k > 0xffff)
1771 k -= 0xffff;
1772
1773 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1774 dev->dev_addr[i++] = (u_char) tmp;
1775 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1776 dev->dev_addr[i++] = (u_char) tmp;
1777
1778 if (k > 0xffff)
1779 k -= 0xffff;
1780 }
1781 if (k == 0xffff)
1782 k = 0;
1783
1784 chksum = (u_char) inb(DEPCA_PROM + x);
1785 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1786 if (k != chksum)
1787 status = -1;
1788
1789 return status;
1790}
1791
1792/*
1793** Load a packet into the shared memory
1794*/
1795static int load_packet(struct net_device *dev, struct sk_buff *skb)
1796{
Wang Chen4cf16532008-11-12 23:38:14 -08001797 struct depca_private *lp = netdev_priv(dev);
Patrick McHardyec634fe2009-07-05 19:23:38 -07001798 int i, entry, end, len, status = NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799
1800 entry = lp->tx_new; /* Ring around buffer number. */
1801 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1802 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001803 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 ** Caution: the write order is important here... don't set up the
1805 ** ownership rights until all the other information is in place.
1806 */
1807 if (end < entry) { /* wrapped buffer */
1808 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1809 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1810 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1811 } else { /* linear buffer */
1812 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1813 }
1814
1815 /* set up the buffer descriptors */
1816 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1817 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1818 /* clean out flags */
1819 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1820 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1821 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1822 len -= TX_BUFF_SZ;
1823 }
1824 /* clean out flags */
1825 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1826 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1827 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1828
1829 /* start of packet */
1830 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1831 /* end of packet */
1832 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1833
1834 for (i = end; i != entry; --i) {
1835 /* ownership of packet */
1836 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1837 if (i == 0)
1838 i = lp->txRingMask + 1;
1839 }
1840 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1841
1842 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1843 } else {
Patrick McHardy5b548142009-06-12 06:22:29 +00001844 status = NETDEV_TX_LOCKED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 }
1846
1847 return status;
1848}
1849
1850static void depca_dbg_open(struct net_device *dev)
1851{
Wang Chen4cf16532008-11-12 23:38:14 -08001852 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 u_long ioaddr = dev->base_addr;
1854 struct depca_init *p = &lp->init_block;
1855 int i;
1856
1857 if (depca_debug > 1) {
1858 /* Do not copy the shadow init block into shared memory */
1859 /* Debugging should not affect normal operation! */
1860 /* The shadow init block will get copied across during InitRestartDepca */
1861 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1862 printk("Descriptor head addresses (CPU):\n");
1863 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1864 printk("Descriptor addresses (CPU):\nRX: ");
1865 for (i = 0; i < lp->rxRingMask; i++) {
1866 if (i < 3) {
1867 printk("%p ", &lp->rx_ring[i].base);
1868 }
1869 }
1870 printk("...%p\n", &lp->rx_ring[i].base);
1871 printk("TX: ");
1872 for (i = 0; i < lp->txRingMask; i++) {
1873 if (i < 3) {
1874 printk("%p ", &lp->tx_ring[i].base);
1875 }
1876 }
1877 printk("...%p\n", &lp->tx_ring[i].base);
1878 printk("\nDescriptor buffers (Device):\nRX: ");
1879 for (i = 0; i < lp->rxRingMask; i++) {
1880 if (i < 3) {
1881 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1882 }
1883 }
1884 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1885 printk("TX: ");
1886 for (i = 0; i < lp->txRingMask; i++) {
1887 if (i < 3) {
1888 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1889 }
1890 }
1891 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1892 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1893 printk(" mode: 0x%4.4x\n", p->mode);
Johannes Berge1749612008-10-27 15:59:26 -07001894 printk(" physical address: %pM\n", p->phys_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 printk(" multicast hash table: ");
1896 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1897 printk("%2.2x:", p->mcast_table[i]);
1898 }
1899 printk("%2.2x\n", p->mcast_table[i]);
1900 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1901 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1902 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1903 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1904 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1905 outw(CSR2, DEPCA_ADDR);
1906 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1907 outw(CSR1, DEPCA_ADDR);
1908 printk("%4.4x\n", inw(DEPCA_DATA));
1909 outw(CSR3, DEPCA_ADDR);
1910 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1911 }
1912
1913 return;
1914}
1915
1916/*
1917** Perform IOCTL call functions here. Some are privileged operations and the
1918** effective uid is checked in those cases.
1919** All multicast IOCTLs will not work here and are for testing purposes only.
1920*/
1921static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1922{
Wang Chen4cf16532008-11-12 23:38:14 -08001923 struct depca_private *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1925 int i, status = 0;
1926 u_long ioaddr = dev->base_addr;
1927 union {
1928 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1929 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1930 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1931 } tmp;
1932 unsigned long flags;
1933 void *buf;
1934
1935 switch (ioc->cmd) {
1936 case DEPCA_GET_HWADDR: /* Get the hardware address */
1937 for (i = 0; i < ETH_ALEN; i++) {
1938 tmp.addr[i] = dev->dev_addr[i];
1939 }
1940 ioc->len = ETH_ALEN;
1941 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1942 return -EFAULT;
1943 break;
1944
1945 case DEPCA_SET_HWADDR: /* Set the hardware address */
1946 if (!capable(CAP_NET_ADMIN))
1947 return -EPERM;
1948 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1949 return -EFAULT;
1950 for (i = 0; i < ETH_ALEN; i++) {
1951 dev->dev_addr[i] = tmp.addr[i];
1952 }
1953 netif_stop_queue(dev);
1954 while (lp->tx_old != lp->tx_new)
1955 cpu_relax(); /* Wait for the ring to empty */
1956
1957 STOP_DEPCA; /* Temporarily stop the depca. */
1958 depca_init_ring(dev); /* Initialize the descriptor rings */
1959 LoadCSRs(dev); /* Reload CSR3 */
1960 InitRestartDepca(dev); /* Resume normal operation. */
1961 netif_start_queue(dev); /* Unlock the TX ring */
1962 break;
1963
1964 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1965 if (!capable(CAP_NET_ADMIN))
1966 return -EPERM;
1967 netif_stop_queue(dev);
1968 while (lp->tx_old != lp->tx_new)
1969 cpu_relax(); /* Wait for the ring to empty */
1970
1971 STOP_DEPCA; /* Temporarily stop the depca. */
1972 depca_init_ring(dev); /* Initialize the descriptor rings */
1973 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1974
1975 LoadCSRs(dev); /* Reload CSR3 */
1976 InitRestartDepca(dev); /* Resume normal operation. */
1977 netif_start_queue(dev); /* Unlock the TX ring */
1978 break;
1979
1980 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1981 if (!capable(CAP_NET_ADMIN))
1982 return -EPERM;
1983 netif_stop_queue(dev);
1984 while (lp->tx_old != lp->tx_new)
1985 cpu_relax(); /* Wait for the ring to empty */
1986
1987 STOP_DEPCA; /* Temporarily stop the depca. */
1988 depca_init_ring(dev); /* Initialize the descriptor rings */
1989 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1990
1991 LoadCSRs(dev); /* Reload CSR3 */
1992 InitRestartDepca(dev); /* Resume normal operation. */
1993 netif_start_queue(dev); /* Unlock the TX ring */
1994 break;
1995
1996 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1997 if(!capable(CAP_NET_ADMIN))
1998 return -EPERM;
1999 printk("%s: Boo!\n", dev->name);
2000 break;
2001
2002 case DEPCA_GET_MCA: /* Get the multicast address table */
2003 ioc->len = (HASH_TABLE_LEN >> 3);
2004 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2005 return -EFAULT;
2006 break;
2007
2008 case DEPCA_SET_MCA: /* Set a multicast address */
2009 if (!capable(CAP_NET_ADMIN))
2010 return -EPERM;
2011 if (ioc->len >= HASH_TABLE_LEN)
2012 return -EINVAL;
2013 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2014 return -EFAULT;
2015 set_multicast_list(dev);
2016 break;
2017
2018 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2019 if (!capable(CAP_NET_ADMIN))
2020 return -EPERM;
2021 set_multicast_list(dev);
2022 break;
2023
2024 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2025 if (!capable(CAP_NET_ADMIN))
2026 return -EPERM;
2027 set_multicast_list(dev);
2028 break;
2029
2030 case DEPCA_GET_STATS: /* Get the driver statistics */
2031 ioc->len = sizeof(lp->pktStats);
2032 buf = kmalloc(ioc->len, GFP_KERNEL);
2033 if(!buf)
2034 return -ENOMEM;
2035 spin_lock_irqsave(&lp->lock, flags);
2036 memcpy(buf, &lp->pktStats, ioc->len);
2037 spin_unlock_irqrestore(&lp->lock, flags);
2038 if (copy_to_user(ioc->data, buf, ioc->len))
2039 status = -EFAULT;
2040 kfree(buf);
2041 break;
2042
2043 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2044 if (!capable(CAP_NET_ADMIN))
2045 return -EPERM;
2046 spin_lock_irqsave(&lp->lock, flags);
2047 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2048 spin_unlock_irqrestore(&lp->lock, flags);
2049 break;
2050
2051 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2052 i = 0;
2053 tmp.sval[i++] = inw(DEPCA_NICSR);
2054 outw(CSR0, DEPCA_ADDR); /* status register */
2055 tmp.sval[i++] = inw(DEPCA_DATA);
2056 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2057 ioc->len = i + sizeof(struct depca_init);
2058 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2059 return -EFAULT;
2060 break;
2061
2062 default:
2063 return -EOPNOTSUPP;
2064 }
2065
2066 return status;
2067}
2068
2069static int __init depca_module_init (void)
2070{
2071 int err = 0;
2072
2073#ifdef CONFIG_MCA
2074 err = mca_register_driver (&depca_mca_driver);
2075#endif
2076#ifdef CONFIG_EISA
2077 err |= eisa_driver_register (&depca_eisa_driver);
2078#endif
Russell King3ae5eae2005-11-09 22:32:44 +00002079 err |= platform_driver_register (&depca_isa_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 depca_platform_probe ();
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002081
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 return err;
2083}
2084
2085static void __exit depca_module_exit (void)
2086{
2087 int i;
2088#ifdef CONFIG_MCA
2089 mca_unregister_driver (&depca_mca_driver);
2090#endif
2091#ifdef CONFIG_EISA
2092 eisa_driver_unregister (&depca_eisa_driver);
2093#endif
Russell King3ae5eae2005-11-09 22:32:44 +00002094 platform_driver_unregister (&depca_isa_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095
2096 for (i = 0; depca_io_ports[i].iobase; i++) {
2097 if (depca_io_ports[i].device) {
Russell King5d994b72005-11-05 21:20:21 +00002098 depca_io_ports[i].device->dev.platform_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 platform_device_unregister (depca_io_ports[i].device);
2100 depca_io_ports[i].device = NULL;
2101 }
2102 }
2103}
2104
2105module_init (depca_module_init);
2106module_exit (depca_module_exit);