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[deliverable/linux.git] / drivers / net / depca.c
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1da177e4
LT		 1/* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
2
3 Written 1994, 1995 by David C. Davies.
4
5
6 Copyright 1994 David C. Davies
6aa20a22 7 and
1da177e4 8 United States Government
6aa20a22 9 (as represented by the Director, National Security Agency).
1da177e4
LT		 10
11 Copyright 1995 Digital Equipment Corporation.
12
13
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
16
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
19
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
28
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
31
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
36
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
39
40 The author may be reached at davies@maniac.ultranet.com
41
42 =========================================================================
43
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
48
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
6aa20a22 64
1da177e4
LT		 65
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
68
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
79
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
84
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
97
98 ************************************************************************
99
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
107
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
110
111 ************************************************************************
112
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
117
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
121
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
124
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
6aa20a22
JG		 138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
1da177e4
LT		 140 7) enjoy!
141
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
144
6aa20a22 145 To unload a module, turn off the associated interface
1da177e4
LT		 146 'ifconfig eth?? down' then 'rmmod depca'.
147
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
6aa20a22 151 option will not work with kernel built-in depca's.
1da177e4
LT		 152
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
156
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
6aa20a22 160 fully stress-tested).
1da177e4
LT		 161
162 Currently known bugs/limitations:
163
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
169
170 ************************************************************************
171 TO DO:
172 ------
173
174
175 Revision History
176 ----------------
177
178 Version Date Description
6aa20a22 179
1da177e4
LT		 180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
6aa20a22 193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
1da177e4
LT		 194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
6aa20a22 201 0.385 3-apr-95 Fix a recognition bug reported by
1da177e4
LT		 202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
6aa20a22 208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
1da177e4
LT		 209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
6aa20a22 211 Both above from a suggestion by
1da177e4
LT		 212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
6aa20a22 221 by <tymm@computer.org>
1da177e4
LT		 222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
234
235 =========================================================================
236*/
237
1da177e4
LT		 238#include <linux/module.h>
239#include <linux/kernel.h>
d43c36dc 240#include <linux/sched.h>
1da177e4
LT		 241#include <linux/string.h>
242#include <linux/errno.h>
243#include <linux/ioport.h>
244#include <linux/slab.h>
245#include <linux/interrupt.h>
246#include <linux/delay.h>
247#include <linux/init.h>
248#include <linux/crc32.h>
249#include <linux/netdevice.h>
250#include <linux/etherdevice.h>
251#include <linux/skbuff.h>
252#include <linux/time.h>
253#include <linux/types.h>
254#include <linux/unistd.h>
255#include <linux/ctype.h>
256#include <linux/moduleparam.h>
d052d1be 257#include <linux/platform_device.h>
1da177e4
LT		 258#include <linux/bitops.h>
259
260#include <asm/uaccess.h>
261#include <asm/io.h>
262#include <asm/dma.h>
263
264#ifdef CONFIG_MCA
265#include <linux/mca.h>
266#endif
267
268#ifdef CONFIG_EISA
269#include <linux/eisa.h>
270#endif
271
272#include "depca.h"
273
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
3ae5eaec 401static int depca_isa_probe (struct platform_device *);
1da177e4 402
3ae5eaec
RK		 403static 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 = {
1da177e4 409 .probe = depca_isa_probe,
3ae5eaec
RK		 410 .remove = __devexit_p(depca_isa_remove),
411 .driver = {
412 .name = depca_string,
413 },
1da177e4 414};
6aa20a22 415
1da177e4
LT		 416/*
417** Miscellaneous info...
418*/
419#define DEPCA_STRLEN 16
420
421/*
422** Memory Alignment. Each descriptor is 4 longwords long. To force a
423** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
424** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
6aa20a22 425** and hence the RX descriptor ring's first entry.
1da177e4
LT		 426*/
427#define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
428#define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
429#define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
430
431/*
6aa20a22 432** The DEPCA Rx and Tx ring descriptors.
1da177e4
LT		 433*/
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. */
1da177e4
LT		 489 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);
61357325
SH		 520static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
521 struct net_device *dev);
7d12e780 522static irqreturn_t depca_interrupt(int irq, void *dev_id);
1da177e4
LT		 523static 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);
1da177e4
LT		 526static 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
361bc03e
SH		 571static 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
1da177e4
LT		 583static 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;
6aa20a22 606
1da177e4
LT		 607 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
4cf1653a 617 lp = netdev_priv(dev);
1da177e4
LT		 618 mem_start = lp->mem_start;
619
620 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
621 return -ENXIO;
622
c2313557
KS		 623 printk("%s: %s at 0x%04lx",
624 dev_name(device), depca_signature[lp->adapter], ioaddr);
6aa20a22 625
1da177e4
LT		 626 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);
e174961c 649 printk("%pM", dev->dev_addr);
1da177e4
LT		 650 if (status != 0) {
651 printk(" which has an Ethernet PROM CRC error.\n");
652 return -ENXIO;
653 }
1da177e4
LT		 654
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 }
6aa20a22 669
1da177e4
LT		 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)))
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)",
c2313557 686 depca_signature[lp->adapter], dev_name(device));
1da177e4
LT		 687 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 }
6aa20a22 694
1da177e4
LT		 695 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. */
361bc03e 810 dev->netdev_ops = &depca_netdev_ops;
1da177e4
LT		 811 dev->watchdog_timeo = TX_TIMEOUT;
812
813 dev->mem_start = 0;
814
1aec5bdf 815 dev_set_drvdata(device, dev);
1da177e4 816 SET_NETDEV_DEV (dev, device);
6aa20a22 817
1da177e4
LT		 818 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}
6aa20a22 828
1da177e4
LT		 829
830static int depca_open(struct net_device *dev)
831{
4cf1653a 832 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 833 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
a0607fd3 852 if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
1da177e4
LT		 853 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{
4cf1653a 877 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 878 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);
1ae5dc34 924 dev->trans_start = jiffies; /* prevent tx timeout */
1da177e4
LT		 925 netif_wake_queue(dev);
926 InitRestartDepca(dev);
927}
928
929
6aa20a22
JG		 930/*
931** Writes a socket buffer to TX descriptor ring and starts transmission
1da177e4 932*/
61357325
SH		 933static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
934 struct net_device *dev)
1da177e4 935{
4cf1653a 936 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 937 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
5b057c6b
HX		 944 if (skb_padto(skb, ETH_ZLEN))
945 goto out;
6aa20a22 946
1da177e4
LT		 947 netif_stop_queue(dev);
948
949 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950 status = load_packet(dev, skb);
951
952 if (!status) {
953 /* Trigger an immediate send demand. */
954 outw(CSR0, DEPCA_ADDR);
955 outw(INEA | TDMD, DEPCA_DATA);
956
1da177e4
LT		 957 dev_kfree_skb(skb);
958 }
959 if (TX_BUFFS_AVAIL)
960 netif_start_queue(dev);
961 } else
5b548140 962 status = NETDEV_TX_LOCKED;
1da177e4
LT		 963
964 out:
965 return status;
966}
967
968/*
6aa20a22 969** The DEPCA interrupt handler.
1da177e4 970*/
7d12e780 971static irqreturn_t depca_interrupt(int irq, void *dev_id)
1da177e4
LT		 972{
973 struct net_device *dev = dev_id;
974 struct depca_private *lp;
975 s16 csr0, nicsr;
976 u_long ioaddr;
977
978 if (dev == NULL) {
979 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
980 return IRQ_NONE;
981 }
982
4cf1653a 983 lp = netdev_priv(dev);
1da177e4
LT		 984 ioaddr = dev->base_addr;
985
986 spin_lock(&lp->lock);
987
988 /* mask the DEPCA board interrupts and turn on the LED */
989 nicsr = inb(DEPCA_NICSR);
990 nicsr |= (IM | LED);
991 outb(nicsr, DEPCA_NICSR);
992
993 outw(CSR0, DEPCA_ADDR);
994 csr0 = inw(DEPCA_DATA);
995
996 /* Acknowledge all of the current interrupt sources ASAP. */
997 outw(csr0 & INTE, DEPCA_DATA);
998
999 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1000 depca_rx(dev);
1001
1002 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1003 depca_tx(dev);
1004
1005 /* Any resources available? */
1006 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1007 netif_wake_queue(dev);
1008 }
1009
1010 /* Unmask the DEPCA board interrupts and turn off the LED */
1011 nicsr = (nicsr & ~IM & ~LED);
1012 outb(nicsr, DEPCA_NICSR);
1013
1014 spin_unlock(&lp->lock);
1015 return IRQ_HANDLED;
1016}
1017
1018/* Called with lp->lock held */
1019static int depca_rx(struct net_device *dev)
1020{
4cf1653a 1021 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1022 int i, entry;
1023 s32 status;
1024
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 */
1028 lp->rx_old = entry;
1029 }
1030 if (status & R_ENP) { /* Valid frame status */
1031 if (status & R_ERR) { /* There was an error. */
09f75cd7 1032 dev->stats.rx_errors++; /* Update the error stats. */
1da177e4 1033 if (status & R_FRAM)
09f75cd7 1034 dev->stats.rx_frame_errors++;
1da177e4 1035 if (status & R_OFLO)
09f75cd7 1036 dev->stats.rx_over_errors++;
1da177e4 1037 if (status & R_CRC)
09f75cd7 1038 dev->stats.rx_crc_errors++;
1da177e4 1039 if (status & R_BUFF)
09f75cd7 1040 dev->stats.rx_fifo_errors++;
1da177e4
LT		 1041 } else {
1042 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1043 struct sk_buff *skb;
1044
1045 skb = dev_alloc_skb(pkt_len + 2);
1046 if (skb != NULL) {
1047 unsigned char *buf;
1048 skb_reserve(skb, 2); /* 16 byte align the IP header */
1049 buf = skb_put(skb, pkt_len);
1da177e4
LT		 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);
1056 }
1057
6aa20a22
JG		 1058 /*
1059 ** Notify the upper protocol layers that there is another
1da177e4
LT		 1060 ** packet to handle
1061 */
1062 skb->protocol = eth_type_trans(skb, dev);
1063 netif_rx(skb);
1064
1065 /*
1066 ** Update stats
1067 */
09f75cd7
JG		 1068 dev->stats.rx_packets++;
1069 dev->stats.rx_bytes += pkt_len;
1da177e4
LT		 1070 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1071 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1072 lp->pktStats.bins[i]++;
1073 i = DEPCA_PKT_STAT_SZ;
1074 }
1075 }
1076 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1077 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1078 lp->pktStats.broadcast++;
1079 } else {
1080 lp->pktStats.multicast++;
1081 }
1082 } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1083 lp->pktStats.unicast++;
1084 }
1085
1086 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1087 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1088 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1089 }
1090 } else {
1091 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
09f75cd7 1092 dev->stats.rx_dropped++; /* Really, deferred. */
1da177e4
LT		 1093 break;
1094 }
1095 }
1096 /* Change buffer ownership for this last frame, back to the adapter */
1097 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1098 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1099 }
1100 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1101 }
1102
1103 /*
1104 ** Update entry information
1105 */
1106 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1107 }
1108
1109 return 0;
1110}
1111
1112/*
1113** Buffer sent - check for buffer errors.
1114** Called with lp->lock held
1115*/
1116static int depca_tx(struct net_device *dev)
1117{
4cf1653a 1118 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1119 int entry;
1120 s32 status;
1121 u_long ioaddr = dev->base_addr;
1122
1123 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1124 status = readl(&lp->tx_ring[entry].base) >> 16;
1125
1126 if (status < 0) { /* Packet not yet sent! */
1127 break;
1128 } else if (status & T_ERR) { /* An error occurred. */
1129 status = readl(&lp->tx_ring[entry].misc);
09f75cd7 1130 dev->stats.tx_errors++;
1da177e4 1131 if (status & TMD3_RTRY)
09f75cd7 1132 dev->stats.tx_aborted_errors++;
1da177e4 1133 if (status & TMD3_LCAR)
09f75cd7 1134 dev->stats.tx_carrier_errors++;
1da177e4 1135 if (status & TMD3_LCOL)
09f75cd7 1136 dev->stats.tx_window_errors++;
1da177e4 1137 if (status & TMD3_UFLO)
09f75cd7 1138 dev->stats.tx_fifo_errors++;
1da177e4
LT		 1139 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1140 /* Trigger an immediate send demand. */
1141 outw(CSR0, DEPCA_ADDR);
1142 outw(INEA | TDMD, DEPCA_DATA);
1143 }
1144 } else if (status & (T_MORE | T_ONE)) {
09f75cd7 1145 dev->stats.collisions++;
1da177e4 1146 } else {
09f75cd7 1147 dev->stats.tx_packets++;
1da177e4
LT		 1148 }
1149
1150 /* Update all the pointers */
1151 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1152 }
1153
1154 return 0;
1155}
1156
1157static int depca_close(struct net_device *dev)
1158{
4cf1653a 1159 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1160 s16 nicsr;
1161 u_long ioaddr = dev->base_addr;
1162
1163 netif_stop_queue(dev);
1164
1165 outw(CSR0, DEPCA_ADDR);
1166
1167 if (depca_debug > 1) {
1168 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1169 }
1170
6aa20a22 1171 /*
1da177e4 1172 ** We stop the DEPCA here -- it occasionally polls
6aa20a22 1173 ** memory if we don't.
1da177e4
LT		 1174 */
1175 outw(STOP, DEPCA_DATA);
1176
1177 /*
1178 ** Give back the ROM in case the user wants to go to DOS
1179 */
1180 if (lp->adapter != DEPCA) {
1181 nicsr = inb(DEPCA_NICSR);
1182 nicsr &= ~SHE;
1183 outb(nicsr, DEPCA_NICSR);
1184 }
1185
1186 /*
1187 ** Free the associated irq
1188 */
1189 free_irq(dev->irq, dev);
1190 return 0;
1191}
1192
1193static void LoadCSRs(struct net_device *dev)
1194{
4cf1653a 1195 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1196 u_long ioaddr = dev->base_addr;
1197
1198 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1199 outw((u16) lp->device_ram_start, DEPCA_DATA);
1200 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1201 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1202 outw(CSR3, DEPCA_ADDR); /* ALE control */
1203 outw(ACON, DEPCA_DATA);
1204
1205 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1206
1207 return;
1208}
1209
1210static int InitRestartDepca(struct net_device *dev)
1211{
4cf1653a 1212 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1213 u_long ioaddr = dev->base_addr;
1214 int i, status = 0;
1215
1216 /* Copy the shadow init_block to shared memory */
1217 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1218
1219 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1220 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1221
1222 /* wait for lance to complete initialisation */
1223 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1224
1225 if (i != 100) {
1226 /* clear IDON by writing a "1", enable interrupts and start lance */
1227 outw(IDON | INEA | STRT, DEPCA_DATA);
1228 if (depca_debug > 2) {
1229 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230 }
1231 } else {
1232 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1233 status = -1;
1234 }
1235
1236 return status;
1237}
1238
1da177e4
LT		 1239/*
1240** Set or clear the multicast filter for this adaptor.
1241*/
1242static void set_multicast_list(struct net_device *dev)
1243{
4cf1653a 1244 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1245 u_long ioaddr = dev->base_addr;
1246
107ce6d2
ES		 1247 netif_stop_queue(dev);
1248 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1da177e4 1249
107ce6d2
ES		 1250 STOP_DEPCA; /* Temporarily stop the depca. */
1251 depca_init_ring(dev); /* Initialize the descriptor rings */
1da177e4 1252
107ce6d2
ES		 1253 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1254 lp->init_block.mode |= PROM;
1255 } else {
1256 SetMulticastFilter(dev);
1257 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1da177e4 1258 }
107ce6d2
ES		 1259
1260 LoadCSRs(dev); /* Reload CSR3 */
1261 InitRestartDepca(dev); /* Resume normal operation. */
1262 netif_start_queue(dev); /* Unlock the TX ring */
1da177e4
LT		 1263}
1264
1265/*
1266** Calculate the hash code and update the logical address filter
1267** from a list of ethernet multicast addresses.
1268** Big endian crc one liner is mine, all mine, ha ha ha ha!
1269** LANCE calculates its hash codes big endian.
1270*/
1271static void SetMulticastFilter(struct net_device *dev)
1272{
4cf1653a 1273 struct depca_private *lp = netdev_priv(dev);
22bedad3 1274 struct netdev_hw_addr *ha;
1da177e4
LT		 1275 char *addrs;
1276 int i, j, bit, byte;
1277 u16 hashcode;
1278 u32 crc;
1279
1280 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1281 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1282 lp->init_block.mcast_table[i] = (char) 0xff;
1283 }
1284 } else {
1285 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1286 lp->init_block.mcast_table[i] = 0;
1287 }
1288 /* Add multicast addresses */
22bedad3
JP		 1289 netdev_for_each_mc_addr(ha, dev) {
1290 addrs = ha->addr;
1da177e4
LT		 1291 if ((*addrs & 0x01) == 1) { /* multicast address? */
1292 crc = ether_crc(ETH_ALEN, addrs);
1293 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1294 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1295 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1296 }
1297
1298
1299 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1300 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1301 lp->init_block.mcast_table[byte] |= bit;
1302 }
1303 }
1304 }
1305
1306 return;
1307}
1308
1309static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1310{
1311 int status = 0;
6aa20a22 1312
1da177e4
LT		 1313 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1314 status = -EBUSY;
1315 goto out;
1316 }
6aa20a22 1317
1da177e4
LT		 1318 if (DevicePresent(ioaddr)) {
1319 status = -ENODEV;
1320 goto out_release;
1321 }
1322
1323 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1324 status = -ENOMEM;
1325 goto out_release;
1326 }
1327
1328 return 0;
6aa20a22 1329
1da177e4
LT		 1330 out_release:
1331 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1332 out:
1333 return status;
1334}
1335
1336#ifdef CONFIG_MCA
1337/*
1338** Microchannel bus I/O device probe
1339*/
1340static int __init depca_mca_probe(struct device *device)
1341{
1342 unsigned char pos[2];
1343 unsigned char where;
1344 unsigned long iobase, mem_start;
1345 int irq, err;
1346 struct mca_device *mdev = to_mca_device (device);
1347 struct net_device *dev;
1348 struct depca_private *lp;
1349
1350 /*
6aa20a22 1351 ** Search for the adapter. If an address has been given, search
1da177e4
LT		 1352 ** specifically for the card at that address. Otherwise find the
1353 ** first card in the system.
1354 */
6aa20a22 1355
1da177e4
LT		 1356 pos[0] = mca_device_read_stored_pos(mdev, 2);
1357 pos[1] = mca_device_read_stored_pos(mdev, 3);
1358
1359 /*
6aa20a22 1360 ** IO of card is handled by bits 1 and 2 of pos0.
1da177e4
LT		 1361 **
1362 ** bit2 bit1 IO
1363 ** 0 0 0x2c00
1364 ** 0 1 0x2c10
1365 ** 1 0 0x2c20
1366 ** 1 1 0x2c30
1367 */
1368 where = (pos[0] & 6) >> 1;
1369 iobase = 0x2c00 + (0x10 * where);
1370
1371 /*
1372 ** Found the adapter we were looking for. Now start setting it up.
6aa20a22 1373 **
1da177e4
LT		 1374 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1375 ** of pos1. Bits are as follows (from the ADF file):
1376 **
6aa20a22
JG		 1377 ** Bits
1378 ** 3 2 1 0 IRQ
1da177e4
LT		 1379 ** --------------------
1380 ** 0 0 1 0 5
1381 ** 0 0 0 1 9
1382 ** 0 1 0 0 10
1383 ** 1 0 0 0 11
1384 */
1385 where = pos[1] & 0x0f;
1386 switch (where) {
1387 case 1:
1388 irq = 9;
1389 break;
1390 case 2:
1391 irq = 5;
1392 break;
1393 case 4:
1394 irq = 10;
1395 break;
1396 case 8:
1397 irq = 11;
1398 break;
1399 default:
6a6bbd29 1400 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1da177e4
LT		 1401 return -EINVAL;
1402 }
1403
1404 /*
1405 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1406 ** They are mapped as follows:
1407 **
1408 ** Bit
1409 ** 5 4 3 Memory Addresses
1410 ** 0 0 0 C0000-CFFFF (64K)
1411 ** 1 0 0 C8000-CFFFF (32K)
1412 ** 0 0 1 D0000-DFFFF (64K)
1413 ** 1 0 1 D8000-DFFFF (32K)
1414 ** 0 1 0 E0000-EFFFF (64K)
1415 ** 1 1 0 E8000-EFFFF (32K)
1416 */
1417 where = (pos[0] & 0x18) >> 3;
1418 mem_start = 0xc0000 + (where * 0x10000);
1419 if (pos[0] & 0x20) {
1420 mem_start += 0x8000;
1421 }
1422
1423 /* claim the slot */
1424 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1425 sizeof(mdev->name));
1426 mca_device_set_claim(mdev, 1);
6aa20a22 1427
1da177e4
LT		 1428 /*
1429 ** Get everything allocated and initialized... (almost just
1430 ** like the ISA and EISA probes)
1431 */
1432 irq = mca_device_transform_irq(mdev, irq);
1433 iobase = mca_device_transform_ioport(mdev, iobase);
1434
1435 if ((err = depca_common_init (iobase, &dev)))
1436 goto out_unclaim;
1437
1438 dev->irq = irq;
1439 dev->base_addr = iobase;
4cf1653a 1440 lp = netdev_priv(dev);
1da177e4
LT		 1441 lp->depca_bus = DEPCA_BUS_MCA;
1442 lp->adapter = depca_mca_adapter_type[mdev->index];
1443 lp->mem_start = mem_start;
6aa20a22 1444
1da177e4
LT		 1445 if ((err = depca_hw_init(dev, device)))
1446 goto out_free;
6aa20a22 1447
1da177e4
LT		 1448 return 0;
1449
1450 out_free:
1451 free_netdev (dev);
1452 release_region (iobase, DEPCA_TOTAL_SIZE);
1453 out_unclaim:
1454 mca_device_set_claim(mdev, 0);
1455
1456 return err;
1457}
1458#endif
1459
1460/*
1461** ISA bus I/O device probe
1462*/
1463
1da177e4
LT		 1464static void __init depca_platform_probe (void)
1465{
1466 int i;
1467 struct platform_device *pldev;
1468
1469 for (i = 0; depca_io_ports[i].iobase; i++) {
1470 depca_io_ports[i].device = NULL;
6aa20a22 1471
1da177e4
LT		 1472 /* if an address has been specified on the command
1473 * line, use it (if valid) */
1474 if (io && io != depca_io_ports[i].iobase)
1475 continue;
5d994b7f
RK		 1476
1477 pldev = platform_device_alloc(depca_string, i);
1478 if (!pldev)
1da177e4
LT		 1479 continue;
1480
1da177e4 1481 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1da177e4
LT		 1482 depca_io_ports[i].device = pldev;
1483
5d994b7f 1484 if (platform_device_add(pldev)) {
1da177e4 1485 depca_io_ports[i].device = NULL;
d91c088b
AR		 1486 pldev->dev.platform_data = NULL;
1487 platform_device_put(pldev);
1da177e4
LT		 1488 continue;
1489 }
1490
1491 if (!pldev->dev.driver) {
1492 /* The driver was not bound to this device, there was
1493 * no hardware at this address. Unregister it, as the
1494 * release fuction will take care of freeing the
1495 * allocated structure */
6aa20a22 1496
1da177e4 1497 depca_io_ports[i].device = NULL;
5d994b7f 1498 pldev->dev.platform_data = NULL;
1da177e4
LT		 1499 platform_device_unregister (pldev);
1500 }
1501 }
1502}
1503
1504static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1505{
1506 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1507 enum depca_type adapter = unknown;
1508 int i;
1509
1510 for (i = 0; mem_base[i]; i++) {
1511 *mem_start = mem ? mem : mem_base[i];
1512 adapter = DepcaSignature (adapter_name, *mem_start);
1513 if (adapter != unknown)
1514 break;
1515 }
1516
1517 return adapter;
1518}
1519
3ae5eaec 1520static int __init depca_isa_probe (struct platform_device *device)
1da177e4
LT		 1521{
1522 struct net_device *dev;
1523 struct depca_private *lp;
1524 u_long ioaddr, mem_start = 0;
1525 enum depca_type adapter = unknown;
1526 int status = 0;
1527
3ae5eaec 1528 ioaddr = (u_long) device->dev.platform_data;
1da177e4
LT		 1529
1530 if ((status = depca_common_init (ioaddr, &dev)))
1531 goto out;
1532
1533 adapter = depca_shmem_probe (&mem_start);
6aa20a22 1534
1da177e4
LT		 1535 if (adapter == unknown) {
1536 status = -ENODEV;
1537 goto out_free;
1538 }
1539
1540 dev->base_addr = ioaddr;
1541 dev->irq = irq; /* Use whatever value the user gave
1542 * us, and 0 if he didn't. */
4cf1653a 1543 lp = netdev_priv(dev);
1da177e4
LT		 1544 lp->depca_bus = DEPCA_BUS_ISA;
1545 lp->adapter = adapter;
1546 lp->mem_start = mem_start;
6aa20a22 1547
3ae5eaec 1548 if ((status = depca_hw_init(dev, &device->dev)))
1da177e4 1549 goto out_free;
6aa20a22 1550
1da177e4
LT		 1551 return 0;
1552
1553 out_free:
1554 free_netdev (dev);
1555 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1556 out:
1557 return status;
1558}
1559
1560/*
1561** EISA callbacks from sysfs.
1562*/
1563
1564#ifdef CONFIG_EISA
1565static int __init depca_eisa_probe (struct device *device)
1566{
99da1a8a 1567 enum depca_type adapter = unknown;
1da177e4
LT		 1568 struct eisa_device *edev;
1569 struct net_device *dev;
1570 struct depca_private *lp;
1571 u_long ioaddr, mem_start;
1572 int status = 0;
1573
1574 edev = to_eisa_device (device);
1575 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1576
1577 if ((status = depca_common_init (ioaddr, &dev)))
1578 goto out;
1579
1580 /* It would have been nice to get card configuration from the
1581 * card. Unfortunately, this register is write-only (shares
1582 * it's address with the ethernet prom)... As we don't parse
1583 * the EISA configuration structures (yet... :-), just rely on
1584 * the ISA probing to sort it out... */
6aa20a22 1585
99da1a8a
IM		 1586 adapter = depca_shmem_probe (&mem_start);
1587 if (adapter == unknown) {
1588 status = -ENODEV;
1589 goto out_free;
1590 }
1da177e4
LT		 1591
1592 dev->base_addr = ioaddr;
1593 dev->irq = irq;
4cf1653a 1594 lp = netdev_priv(dev);
1da177e4
LT		 1595 lp->depca_bus = DEPCA_BUS_EISA;
1596 lp->adapter = edev->id.driver_data;
1597 lp->mem_start = mem_start;
6aa20a22 1598
1da177e4
LT		 1599 if ((status = depca_hw_init(dev, device)))
1600 goto out_free;
6aa20a22 1601
1da177e4
LT		 1602 return 0;
1603
1604 out_free:
1605 free_netdev (dev);
1606 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1607 out:
1608 return status;
1609}
1610#endif
1611
1612static int __devexit depca_device_remove (struct device *device)
1613{
1614 struct net_device *dev;
1615 struct depca_private *lp;
1616 int bus;
1617
1aec5bdf 1618 dev = dev_get_drvdata(device);
4cf1653a 1619 lp = netdev_priv(dev);
1da177e4
LT		 1620
1621 unregister_netdev (dev);
1622 iounmap (lp->sh_mem);
1623 release_mem_region (lp->mem_start, lp->mem_len);
1624 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1625 bus = lp->depca_bus;
1626 free_netdev (dev);
1627
1628 return 0;
1629}
1630
1631/*
1632** Look for a particular board name in the on-board Remote Diagnostics
1633** and Boot (readb) ROM. This will also give us a clue to the network RAM
1634** base address.
1635*/
1636static int __init DepcaSignature(char *name, u_long base_addr)
1637{
1638 u_int i, j, k;
1639 void __iomem *ptr;
1640 char tmpstr[16];
1641 u_long prom_addr = base_addr + 0xc000;
1642 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1643
1644 /* Can't reserve the prom region, it is already marked as
1645 * used, at least on x86. Instead, reserve a memory region a
1646 * board would certainly use. If it works, go ahead. If not,
1647 * run like hell... */
6aa20a22 1648
1da177e4
LT		 1649 if (!request_mem_region (mem_addr, 16, depca_string))
1650 return unknown;
1651
1652 /* Copy the first 16 bytes of ROM */
1653
1654 ptr = ioremap(prom_addr, 16);
1655 if (ptr == NULL) {
1656 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1657 return unknown;
1658 }
1659 for (i = 0; i < 16; i++) {
1660 tmpstr[i] = readb(ptr + i);
1661 }
1662 iounmap(ptr);
1663
1664 release_mem_region (mem_addr, 16);
1665
1666 /* Check if PROM contains a valid string */
1667 for (i = 0; *depca_signature[i] != '\0'; i++) {
1668 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1669 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1670 k++;
1671 } else { /* lost signature; begin search again */
1672 k = 0;
1673 }
1674 }
1675 if (k == strlen(depca_signature[i]))
1676 break;
1677 }
1678
1679 /* Check if name string is valid, provided there's no PROM */
1680 if (name && *name && (i == unknown)) {
1681 for (i = 0; *depca_signature[i] != '\0'; i++) {
1682 if (strcmp(name, depca_signature[i]) == 0)
1683 break;
1684 }
1685 }
1686
1687 return i;
1688}
1689
1690/*
1691** Look for a special sequence in the Ethernet station address PROM that
1692** is common across all DEPCA products. Note that the original DEPCA needs
1693** its ROM address counter to be initialized and enabled. Only enable
1694** if the first address octet is a 0x08 - this minimises the chances of
1695** messing around with some other hardware, but it assumes that this DEPCA
1696** card initialized itself correctly.
6aa20a22 1697**
1da177e4
LT		 1698** Search the Ethernet address ROM for the signature. Since the ROM address
1699** counter can start at an arbitrary point, the search must include the entire
1700** probe sequence length plus the (length_of_the_signature - 1).
1701** Stop the search IMMEDIATELY after the signature is found so that the
1702** PROM address counter is correctly positioned at the start of the
1703** ethernet address for later read out.
1704*/
1705static int __init DevicePresent(u_long ioaddr)
1706{
1707 union {
1708 struct {
1709 u32 a;
1710 u32 b;
1711 } llsig;
1712 char Sig[sizeof(u32) << 1];
1713 }
1714 dev;
1715 short sigLength = 0;
1716 s8 data;
1717 s16 nicsr;
1718 int i, j, status = 0;
1719
1720 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1721 data = inb(DEPCA_PROM); /* read data */
1722
1723 if (data == 0x08) { /* Enable counter on DEPCA */
1724 nicsr = inb(DEPCA_NICSR);
1725 nicsr |= AAC;
1726 outb(nicsr, DEPCA_NICSR);
1727 }
1728
1729 dev.llsig.a = ETH_PROM_SIG;
1730 dev.llsig.b = ETH_PROM_SIG;
1731 sigLength = sizeof(u32) << 1;
1732
1733 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1734 data = inb(DEPCA_PROM);
1735 if (dev.Sig[j] == data) { /* track signature */
1736 j++;
1737 } else { /* lost signature; begin search again */
1738 if (data == dev.Sig[0]) { /* rare case.... */
1739 j = 1;
1740 } else {
1741 j = 0;
1742 }
1743 }
1744 }
1745
1746 if (j != sigLength) {
1747 status = -ENODEV; /* search failed */
1748 }
1749
1750 return status;
1751}
1752
1753/*
1754** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1755** reason: access the upper half of the PROM with x=0; access the lower half
1756** with x=1.
1757*/
1758static int __init get_hw_addr(struct net_device *dev)
1759{
1760 u_long ioaddr = dev->base_addr;
4cf1653a 1761 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1762 int i, k, tmp, status = 0;
1763 u_short j, x, chksum;
1764
1765 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1766
1767 for (i = 0, k = 0, j = 0; j < 3; j++) {
1768 k <<= 1;
1769 if (k > 0xffff)
1770 k -= 0xffff;
1771
1772 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1773 dev->dev_addr[i++] = (u_char) tmp;
1774 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1775 dev->dev_addr[i++] = (u_char) tmp;
1776
1777 if (k > 0xffff)
1778 k -= 0xffff;
1779 }
1780 if (k == 0xffff)
1781 k = 0;
1782
1783 chksum = (u_char) inb(DEPCA_PROM + x);
1784 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1785 if (k != chksum)
1786 status = -1;
1787
1788 return status;
1789}
1790
1791/*
1792** Load a packet into the shared memory
1793*/
1794static int load_packet(struct net_device *dev, struct sk_buff *skb)
1795{
4cf1653a 1796 struct depca_private *lp = netdev_priv(dev);
ec634fe3 1797 int i, entry, end, len, status = NETDEV_TX_OK;
1da177e4
LT		 1798
1799 entry = lp->tx_new; /* Ring around buffer number. */
1800 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1801 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
6aa20a22 1802 /*
1da177e4
LT		 1803 ** Caution: the write order is important here... don't set up the
1804 ** ownership rights until all the other information is in place.
1805 */
1806 if (end < entry) { /* wrapped buffer */
1807 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1808 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1809 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1810 } else { /* linear buffer */
1811 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1812 }
1813
1814 /* set up the buffer descriptors */
1815 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1816 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1817 /* clean out flags */
1818 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1819 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1820 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1821 len -= TX_BUFF_SZ;
1822 }
1823 /* clean out flags */
1824 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1825 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1826 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1827
1828 /* start of packet */
1829 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1830 /* end of packet */
1831 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1832
1833 for (i = end; i != entry; --i) {
1834 /* ownership of packet */
1835 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1836 if (i == 0)
1837 i = lp->txRingMask + 1;
1838 }
1839 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1840
1841 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1842 } else {
5b548140 1843 status = NETDEV_TX_LOCKED;
1da177e4
LT		 1844 }
1845
1846 return status;
1847}
1848
1849static void depca_dbg_open(struct net_device *dev)
1850{
4cf1653a 1851 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1852 u_long ioaddr = dev->base_addr;
1853 struct depca_init *p = &lp->init_block;
1854 int i;
1855
1856 if (depca_debug > 1) {
1857 /* Do not copy the shadow init block into shared memory */
1858 /* Debugging should not affect normal operation! */
1859 /* The shadow init block will get copied across during InitRestartDepca */
1860 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1861 printk("Descriptor head addresses (CPU):\n");
1862 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1863 printk("Descriptor addresses (CPU):\nRX: ");
1864 for (i = 0; i < lp->rxRingMask; i++) {
1865 if (i < 3) {
1866 printk("%p ", &lp->rx_ring[i].base);
1867 }
1868 }
1869 printk("...%p\n", &lp->rx_ring[i].base);
1870 printk("TX: ");
1871 for (i = 0; i < lp->txRingMask; i++) {
1872 if (i < 3) {
1873 printk("%p ", &lp->tx_ring[i].base);
1874 }
1875 }
1876 printk("...%p\n", &lp->tx_ring[i].base);
1877 printk("\nDescriptor buffers (Device):\nRX: ");
1878 for (i = 0; i < lp->rxRingMask; i++) {
1879 if (i < 3) {
1880 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1881 }
1882 }
1883 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1884 printk("TX: ");
1885 for (i = 0; i < lp->txRingMask; i++) {
1886 if (i < 3) {
1887 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1888 }
1889 }
1890 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1891 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1892 printk(" mode: 0x%4.4x\n", p->mode);
e174961c 1893 printk(" physical address: %pM\n", p->phys_addr);
1da177e4
LT		 1894 printk(" multicast hash table: ");
1895 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1896 printk("%2.2x:", p->mcast_table[i]);
1897 }
1898 printk("%2.2x\n", p->mcast_table[i]);
1899 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1900 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1901 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1902 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1903 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1904 outw(CSR2, DEPCA_ADDR);
1905 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1906 outw(CSR1, DEPCA_ADDR);
1907 printk("%4.4x\n", inw(DEPCA_DATA));
1908 outw(CSR3, DEPCA_ADDR);
1909 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1910 }
1911
1912 return;
1913}
1914
1915/*
1916** Perform IOCTL call functions here. Some are privileged operations and the
1917** effective uid is checked in those cases.
1918** All multicast IOCTLs will not work here and are for testing purposes only.
1919*/
1920static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1921{
4cf1653a 1922 struct depca_private *lp = netdev_priv(dev);
1da177e4
LT		 1923 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1924 int i, status = 0;
1925 u_long ioaddr = dev->base_addr;
1926 union {
1927 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1928 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1929 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1930 } tmp;
1931 unsigned long flags;
1932 void *buf;
1933
1934 switch (ioc->cmd) {
1935 case DEPCA_GET_HWADDR: /* Get the hardware address */
1936 for (i = 0; i < ETH_ALEN; i++) {
1937 tmp.addr[i] = dev->dev_addr[i];
1938 }
1939 ioc->len = ETH_ALEN;
1940 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1941 return -EFAULT;
1942 break;
1943
1944 case DEPCA_SET_HWADDR: /* Set the hardware address */
1945 if (!capable(CAP_NET_ADMIN))
1946 return -EPERM;
1947 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1948 return -EFAULT;
1949 for (i = 0; i < ETH_ALEN; i++) {
1950 dev->dev_addr[i] = tmp.addr[i];
1951 }
1952 netif_stop_queue(dev);
1953 while (lp->tx_old != lp->tx_new)
1954 cpu_relax(); /* Wait for the ring to empty */
1955
1956 STOP_DEPCA; /* Temporarily stop the depca. */
1957 depca_init_ring(dev); /* Initialize the descriptor rings */
1958 LoadCSRs(dev); /* Reload CSR3 */
1959 InitRestartDepca(dev); /* Resume normal operation. */
1960 netif_start_queue(dev); /* Unlock the TX ring */
1961 break;
1962
1963 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1964 if (!capable(CAP_NET_ADMIN))
1965 return -EPERM;
1966 netif_stop_queue(dev);
1967 while (lp->tx_old != lp->tx_new)
1968 cpu_relax(); /* Wait for the ring to empty */
1969
1970 STOP_DEPCA; /* Temporarily stop the depca. */
1971 depca_init_ring(dev); /* Initialize the descriptor rings */
1972 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1973
1974 LoadCSRs(dev); /* Reload CSR3 */
1975 InitRestartDepca(dev); /* Resume normal operation. */
1976 netif_start_queue(dev); /* Unlock the TX ring */
1977 break;
1978
1979 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1980 if (!capable(CAP_NET_ADMIN))
1981 return -EPERM;
1982 netif_stop_queue(dev);
1983 while (lp->tx_old != lp->tx_new)
1984 cpu_relax(); /* Wait for the ring to empty */
1985
1986 STOP_DEPCA; /* Temporarily stop the depca. */
1987 depca_init_ring(dev); /* Initialize the descriptor rings */
1988 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1989
1990 LoadCSRs(dev); /* Reload CSR3 */
1991 InitRestartDepca(dev); /* Resume normal operation. */
1992 netif_start_queue(dev); /* Unlock the TX ring */
1993 break;
1994
1995 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1996 if(!capable(CAP_NET_ADMIN))
1997 return -EPERM;
1998 printk("%s: Boo!\n", dev->name);
1999 break;
2000
2001 case DEPCA_GET_MCA: /* Get the multicast address table */
2002 ioc->len = (HASH_TABLE_LEN >> 3);
2003 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2004 return -EFAULT;
2005 break;
2006
2007 case DEPCA_SET_MCA: /* Set a multicast address */
2008 if (!capable(CAP_NET_ADMIN))
2009 return -EPERM;
2010 if (ioc->len >= HASH_TABLE_LEN)
2011 return -EINVAL;
2012 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2013 return -EFAULT;
2014 set_multicast_list(dev);
2015 break;
2016
2017 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2018 if (!capable(CAP_NET_ADMIN))
2019 return -EPERM;
2020 set_multicast_list(dev);
2021 break;
2022
2023 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2024 if (!capable(CAP_NET_ADMIN))
2025 return -EPERM;
2026 set_multicast_list(dev);
2027 break;
2028
2029 case DEPCA_GET_STATS: /* Get the driver statistics */
2030 ioc->len = sizeof(lp->pktStats);
2031 buf = kmalloc(ioc->len, GFP_KERNEL);
2032 if(!buf)
2033 return -ENOMEM;
2034 spin_lock_irqsave(&lp->lock, flags);
2035 memcpy(buf, &lp->pktStats, ioc->len);
2036 spin_unlock_irqrestore(&lp->lock, flags);
2037 if (copy_to_user(ioc->data, buf, ioc->len))
2038 status = -EFAULT;
2039 kfree(buf);
2040 break;
2041
2042 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2043 if (!capable(CAP_NET_ADMIN))
2044 return -EPERM;
2045 spin_lock_irqsave(&lp->lock, flags);
2046 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2047 spin_unlock_irqrestore(&lp->lock, flags);
2048 break;
2049
2050 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2051 i = 0;
2052 tmp.sval[i++] = inw(DEPCA_NICSR);
2053 outw(CSR0, DEPCA_ADDR); /* status register */
2054 tmp.sval[i++] = inw(DEPCA_DATA);
2055 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2056 ioc->len = i + sizeof(struct depca_init);
2057 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2058 return -EFAULT;
2059 break;
2060
2061 default:
2062 return -EOPNOTSUPP;
2063 }
2064
2065 return status;
2066}
2067
2068static int __init depca_module_init (void)
2069{
2070 int err = 0;
2071
2072#ifdef CONFIG_MCA
2073 err = mca_register_driver (&depca_mca_driver);
2074#endif
2075#ifdef CONFIG_EISA
2076 err |= eisa_driver_register (&depca_eisa_driver);
2077#endif
3ae5eaec 2078 err |= platform_driver_register (&depca_isa_driver);
1da177e4 2079 depca_platform_probe ();
6aa20a22 2080
1da177e4
LT		 2081 return err;
2082}
2083
2084static void __exit depca_module_exit (void)
2085{
2086 int i;
2087#ifdef CONFIG_MCA
2088 mca_unregister_driver (&depca_mca_driver);
2089#endif
2090#ifdef CONFIG_EISA
2091 eisa_driver_unregister (&depca_eisa_driver);
2092#endif
3ae5eaec 2093 platform_driver_unregister (&depca_isa_driver);
1da177e4
LT		 2094
2095 for (i = 0; depca_io_ports[i].iobase; i++) {
2096 if (depca_io_ports[i].device) {
5d994b7f 2097 depca_io_ports[i].device->dev.platform_data = NULL;
1da177e4
LT		 2098 platform_device_unregister (depca_io_ports[i].device);
2099 depca_io_ports[i].device = NULL;
2100 }
2101 }
2102}
2103
2104module_init (depca_module_init);
2105module_exit (depca_module_exit);
Linux kernel - Deliverables
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