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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
7 and
8 United States Government
9 (as represented by the Director, National Security Agency).
10
11 Copyright 1995 Digital Equipment Corporation.
12
13
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
16
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
19
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
28
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
31
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
36
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
39
40 The author may be reached at davies@maniac.ultranet.com
41
42 =========================================================================
43
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
48
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
64
65
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
68
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
79
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
84
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
97
98 ************************************************************************
99
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
107
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
110
111 ************************************************************************
112
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
117
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
121
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
124
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
140 7) enjoy!
141
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
144
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
147
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
151 option will not work with kernel built-in depca's.
152
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
156
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
160 fully stress-tested).
161
162 Currently known bugs/limitations:
163
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
169
170 ************************************************************************
171 TO DO:
172 ------
173
174
175 Revision History
176 ----------------
177
178 Version Date Description
179
180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
201 0.385 3-apr-95 Fix a recognition bug reported by
202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
211 Both above from a suggestion by
212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
221 by <tymm@computer.org>
222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
234
235 =========================================================================
236*/
237
238#include <linux/config.h>
239#include <linux/module.h>
240#include <linux/kernel.h>
241#include <linux/string.h>
242#include <linux/errno.h>
243#include <linux/ioport.h>
244#include <linux/slab.h>
245#include <linux/interrupt.h>
246#include <linux/delay.h>
247#include <linux/init.h>
248#include <linux/crc32.h>
249#include <linux/netdevice.h>
250#include <linux/etherdevice.h>
251#include <linux/skbuff.h>
252#include <linux/time.h>
253#include <linux/types.h>
254#include <linux/unistd.h>
255#include <linux/ctype.h>
256#include <linux/moduleparam.h>
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
401static int depca_isa_probe (struct device *);
402
403static struct device_driver depca_isa_driver = {
404 .name = depca_string,
405 .bus = &platform_bus_type,
406 .probe = depca_isa_probe,
407 .remove = __devexit_p(depca_device_remove),
408};
409
410/*
411** Miscellaneous info...
412*/
413#define DEPCA_STRLEN 16
414
415/*
416** Memory Alignment. Each descriptor is 4 longwords long. To force a
417** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
418** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
419** and hence the RX descriptor ring's first entry.
420*/
421#define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
422#define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
423#define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
424
425/*
426** The DEPCA Rx and Tx ring descriptors.
427*/
428struct depca_rx_desc {
429 volatile s32 base;
430 s16 buf_length; /* This length is negative 2's complement! */
431 s16 msg_length; /* This length is "normal". */
432};
433
434struct depca_tx_desc {
435 volatile s32 base;
436 s16 length; /* This length is negative 2's complement! */
437 s16 misc; /* Errors and TDR info */
438};
439
440#define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
441 to LANCE memory address space */
442
443/*
444** The Lance initialization block, described in databook, in common memory.
445*/
446struct depca_init {
447 u16 mode; /* Mode register */
448 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
449 u8 mcast_table[8]; /* Multicast Hash Table. */
450 u32 rx_ring; /* Rx ring base pointer & ring length */
451 u32 tx_ring; /* Tx ring base pointer & ring length */
452};
453
454#define DEPCA_PKT_STAT_SZ 16
455#define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
456 increase DEPCA_PKT_STAT_SZ */
457struct depca_private {
458 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
459 enum depca_type adapter; /* Adapter type */
460 enum {
461 DEPCA_BUS_MCA = 1,
462 DEPCA_BUS_ISA,
463 DEPCA_BUS_EISA,
464 } depca_bus; /* type of bus */
465 struct depca_init init_block; /* Shadow Initialization block */
466/* CPU address space fields */
467 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
468 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
469 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
470 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
471 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
472 u_long mem_start; /* Bus address of device RAM (before remap) */
473 u_long mem_len; /* device memory size */
474/* Device address space fields */
475 u_long device_ram_start; /* Start of RAM in device addr space */
476/* Offsets used in both address spaces */
477 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
478 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
479 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
480/* Kernel-only (not device) fields */
481 int rx_new, tx_new; /* The next free ring entry */
482 int rx_old, tx_old; /* The ring entries to be free()ed. */
483 struct net_device_stats stats;
484 spinlock_t lock;
485 struct { /* Private stats counters */
486 u32 bins[DEPCA_PKT_STAT_SZ];
487 u32 unicast;
488 u32 multicast;
489 u32 broadcast;
490 u32 excessive_collisions;
491 u32 tx_underruns;
492 u32 excessive_underruns;
493 } pktStats;
494 int txRingMask; /* TX ring mask */
495 int rxRingMask; /* RX ring mask */
496 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
497 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
498};
499
500/*
501** The transmit ring full condition is described by the tx_old and tx_new
502** pointers by:
503** tx_old = tx_new Empty ring
504** tx_old = tx_new+1 Full ring
505** tx_old+txRingMask = tx_new Full ring (wrapped condition)
506*/
507#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
508 lp->tx_old+lp->txRingMask-lp->tx_new:\
509 lp->tx_old -lp->tx_new-1)
510
511/*
512** Public Functions
513*/
514static int depca_open(struct net_device *dev);
515static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
516static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs);
517static int depca_close(struct net_device *dev);
518static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
519static void depca_tx_timeout(struct net_device *dev);
520static struct net_device_stats *depca_get_stats(struct net_device *dev);
521static void set_multicast_list(struct net_device *dev);
522
523/*
524** Private functions
525*/
526static void depca_init_ring(struct net_device *dev);
527static int depca_rx(struct net_device *dev);
528static int depca_tx(struct net_device *dev);
529
530static void LoadCSRs(struct net_device *dev);
531static int InitRestartDepca(struct net_device *dev);
532static int DepcaSignature(char *name, u_long paddr);
533static int DevicePresent(u_long ioaddr);
534static int get_hw_addr(struct net_device *dev);
535static void SetMulticastFilter(struct net_device *dev);
536static int load_packet(struct net_device *dev, struct sk_buff *skb);
537static void depca_dbg_open(struct net_device *dev);
538
539static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
540static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
541static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
542static u_char *depca_irq;
543
544static int irq;
545static int io;
546static char *adapter_name;
547static int mem; /* For loadable module assignment
548 use insmod mem=0x????? .... */
549module_param (irq, int, 0);
550module_param (io, int, 0);
551module_param (adapter_name, charp, 0);
552module_param (mem, int, 0);
553MODULE_PARM_DESC(irq, "DEPCA IRQ number");
554MODULE_PARM_DESC(io, "DEPCA I/O base address");
555MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
556MODULE_PARM_DESC(mem, "DEPCA shared memory address");
557MODULE_LICENSE("GPL");
558
559/*
560** Miscellaneous defines...
561*/
562#define STOP_DEPCA \
563 outw(CSR0, DEPCA_ADDR);\
564 outw(STOP, DEPCA_DATA)
565
566static int __init depca_hw_init (struct net_device *dev, struct device *device)
567{
568 struct depca_private *lp;
569 int i, j, offset, netRAM, mem_len, status = 0;
570 s16 nicsr;
571 u_long ioaddr;
572 u_long mem_start;
573
574 /*
575 * We are now supposed to enter this function with the
576 * following fields filled with proper values :
577 *
578 * dev->base_addr
579 * lp->mem_start
580 * lp->depca_bus
581 * lp->adapter
582 *
583 * dev->irq can be set if known from device configuration (on
584 * MCA or EISA) or module option. Otherwise, it will be auto
585 * detected.
586 */
587
588 ioaddr = dev->base_addr;
589
590 STOP_DEPCA;
591
592 nicsr = inb(DEPCA_NICSR);
593 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
594 outb(nicsr, DEPCA_NICSR);
595
596 if (inw(DEPCA_DATA) != STOP) {
597 return -ENXIO;
598 }
599
600 lp = (struct depca_private *) dev->priv;
601 mem_start = lp->mem_start;
602
603 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
604 return -ENXIO;
605
606 printk ("%s: %s at 0x%04lx",
607 device->bus_id, depca_signature[lp->adapter], ioaddr);
608
609 switch (lp->depca_bus) {
610#ifdef CONFIG_MCA
611 case DEPCA_BUS_MCA:
612 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
613 break;
614#endif
615
616#ifdef CONFIG_EISA
617 case DEPCA_BUS_EISA:
618 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
619 break;
620#endif
621
622 case DEPCA_BUS_ISA:
623 break;
624
625 default:
626 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
627 return -ENXIO;
628 }
629
630 printk(", h/w address ");
631 status = get_hw_addr(dev);
632 if (status != 0) {
633 printk(" which has an Ethernet PROM CRC error.\n");
634 return -ENXIO;
635 }
636 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
637 printk("%2.2x:", dev->dev_addr[i]);
638 }
639 printk("%2.2x", dev->dev_addr[i]);
640
641 /* Set up the maximum amount of network RAM(kB) */
642 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
643 if ((nicsr & _128KB) && (lp->adapter == de422))
644 netRAM = 128;
645
646 /* Shared Memory Base Address */
647 if (nicsr & BUF) {
648 nicsr &= ~BS; /* DEPCA RAM in top 32k */
649 netRAM -= 32;
650
651 /* Only EISA/ISA needs start address to be re-computed */
652 if (lp->depca_bus != DEPCA_BUS_MCA)
653 mem_start += 0x8000;
654 }
655
656 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)))
657 > (netRAM << 10)) {
658 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
659 return -ENXIO;
660 }
661
662 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
663
664 /* Enable the shadow RAM. */
665 if (lp->adapter != DEPCA) {
666 nicsr |= SHE;
667 outb(nicsr, DEPCA_NICSR);
668 }
669
670 spin_lock_init(&lp->lock);
671 sprintf(lp->adapter_name, "%s (%s)",
672 depca_signature[lp->adapter], device->bus_id);
673 status = -EBUSY;
674
675 /* Initialisation Block */
676 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
677 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
678 goto out_priv;
679 }
680
681 status = -EIO;
682 lp->sh_mem = ioremap(mem_start, mem_len);
683 if (lp->sh_mem == NULL) {
684 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
685 goto out1;
686 }
687
688 lp->mem_start = mem_start;
689 lp->mem_len = mem_len;
690 lp->device_ram_start = mem_start & LA_MASK;
691
692 offset = 0;
693 offset += sizeof(struct depca_init);
694
695 /* Tx & Rx descriptors (aligned to a quadword boundary) */
696 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
697 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
698 lp->rx_ring_offset = offset;
699
700 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
701 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
702 lp->tx_ring_offset = offset;
703
704 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
705
706 lp->buffs_offset = offset;
707
708 /* Finish initialising the ring information. */
709 lp->rxRingMask = NUM_RX_DESC - 1;
710 lp->txRingMask = NUM_TX_DESC - 1;
711
712 /* Calculate Tx/Rx RLEN size for the descriptors. */
713 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
714 j >>= 1;
715 }
716 lp->rx_rlen = (s32) (i << 29);
717 for (i = 0, j = lp->txRingMask; j > 0; i++) {
718 j >>= 1;
719 }
720 lp->tx_rlen = (s32) (i << 29);
721
722 /* Load the initialisation block */
723 depca_init_ring(dev);
724
725 /* Initialise the control and status registers */
726 LoadCSRs(dev);
727
728 /* Enable DEPCA board interrupts for autoprobing */
729 nicsr = ((nicsr & ~IM) | IEN);
730 outb(nicsr, DEPCA_NICSR);
731
732 /* To auto-IRQ we enable the initialization-done and DMA err,
733 interrupts. For now we will always get a DMA error. */
734 if (dev->irq < 2) {
735 unsigned char irqnum;
736 unsigned long irq_mask, delay;
737
738 irq_mask = probe_irq_on();
739
740 /* Assign the correct irq list */
741 switch (lp->adapter) {
742 case DEPCA:
743 case de100:
744 case de101:
745 depca_irq = de1xx_irq;
746 break;
747 case de200:
748 case de201:
749 case de202:
750 case de210:
751 case de212:
752 depca_irq = de2xx_irq;
753 break;
754 case de422:
755 depca_irq = de422_irq;
756 break;
757
758 default:
759 break; /* Not reached */
760 }
761
762 /* Trigger an initialization just for the interrupt. */
763 outw(INEA | INIT, DEPCA_DATA);
764
765 delay = jiffies + HZ/50;
766 while (time_before(jiffies, delay))
767 yield();
768
769 irqnum = probe_irq_off(irq_mask);
770
771 status = -ENXIO;
772 if (!irqnum) {
773 printk(" and failed to detect IRQ line.\n");
774 goto out2;
775 } else {
776 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
777 if (irqnum == depca_irq[i]) {
778 dev->irq = irqnum;
779 printk(" and uses IRQ%d.\n", dev->irq);
780 }
781
782 if (!dev->irq) {
783 printk(" but incorrect IRQ line detected.\n");
784 goto out2;
785 }
786 }
787 } else {
788 printk(" and assigned IRQ%d.\n", dev->irq);
789 }
790
791 if (depca_debug > 1) {
792 printk(version);
793 }
794
795 /* The DEPCA-specific entries in the device structure. */
796 dev->open = &depca_open;
797 dev->hard_start_xmit = &depca_start_xmit;
798 dev->stop = &depca_close;
799 dev->get_stats = &depca_get_stats;
800 dev->set_multicast_list = &set_multicast_list;
801 dev->do_ioctl = &depca_ioctl;
802 dev->tx_timeout = depca_tx_timeout;
803 dev->watchdog_timeo = TX_TIMEOUT;
804
805 dev->mem_start = 0;
806
807 device->driver_data = dev;
808 SET_NETDEV_DEV (dev, device);
809
810 status = register_netdev(dev);
811 if (status == 0)
812 return 0;
813out2:
814 iounmap(lp->sh_mem);
815out1:
816 release_mem_region (mem_start, mem_len);
817out_priv:
818 return status;
819}
820\f
821
822static int depca_open(struct net_device *dev)
823{
824 struct depca_private *lp = (struct depca_private *) dev->priv;
825 u_long ioaddr = dev->base_addr;
826 s16 nicsr;
827 int status = 0;
828
829 STOP_DEPCA;
830 nicsr = inb(DEPCA_NICSR);
831
832 /* Make sure the shadow RAM is enabled */
833 if (lp->adapter != DEPCA) {
834 nicsr |= SHE;
835 outb(nicsr, DEPCA_NICSR);
836 }
837
838 /* Re-initialize the DEPCA... */
839 depca_init_ring(dev);
840 LoadCSRs(dev);
841
842 depca_dbg_open(dev);
843
844 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
845 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
846 status = -EAGAIN;
847 } else {
848
849 /* Enable DEPCA board interrupts and turn off LED */
850 nicsr = ((nicsr & ~IM & ~LED) | IEN);
851 outb(nicsr, DEPCA_NICSR);
852 outw(CSR0, DEPCA_ADDR);
853
854 netif_start_queue(dev);
855
856 status = InitRestartDepca(dev);
857
858 if (depca_debug > 1) {
859 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
860 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
861 }
862 }
863 return status;
864}
865
866/* Initialize the lance Rx and Tx descriptor rings. */
867static void depca_init_ring(struct net_device *dev)
868{
869 struct depca_private *lp = (struct depca_private *) dev->priv;
870 u_int i;
871 u_long offset;
872
873 /* Lock out other processes whilst setting up the hardware */
874 netif_stop_queue(dev);
875
876 lp->rx_new = lp->tx_new = 0;
877 lp->rx_old = lp->tx_old = 0;
878
879 /* Initialize the base address and length of each buffer in the ring */
880 for (i = 0; i <= lp->rxRingMask; i++) {
881 offset = lp->buffs_offset + i * RX_BUFF_SZ;
882 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
883 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
884 lp->rx_buff[i] = lp->sh_mem + offset;
885 }
886
887 for (i = 0; i <= lp->txRingMask; i++) {
888 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
889 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
890 lp->tx_buff[i] = lp->sh_mem + offset;
891 }
892
893 /* Set up the initialization block */
894 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
895 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
896
897 SetMulticastFilter(dev);
898
899 for (i = 0; i < ETH_ALEN; i++) {
900 lp->init_block.phys_addr[i] = dev->dev_addr[i];
901 }
902
903 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
904}
905
906
907static void depca_tx_timeout(struct net_device *dev)
908{
909 u_long ioaddr = dev->base_addr;
910
911 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
912
913 STOP_DEPCA;
914 depca_init_ring(dev);
915 LoadCSRs(dev);
916 dev->trans_start = jiffies;
917 netif_wake_queue(dev);
918 InitRestartDepca(dev);
919}
920
921
922/*
923** Writes a socket buffer to TX descriptor ring and starts transmission
924*/
925static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
926{
927 struct depca_private *lp = (struct depca_private *) dev->priv;
928 u_long ioaddr = dev->base_addr;
929 int status = 0;
930
931 /* Transmitter timeout, serious problems. */
932 if (skb->len < 1)
933 goto out;
934
935 if (skb->len < ETH_ZLEN) {
936 skb = skb_padto(skb, ETH_ZLEN);
937 if (skb == NULL)
938 goto out;
939 }
940
941 netif_stop_queue(dev);
942
943 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
944 status = load_packet(dev, skb);
945
946 if (!status) {
947 /* Trigger an immediate send demand. */
948 outw(CSR0, DEPCA_ADDR);
949 outw(INEA | TDMD, DEPCA_DATA);
950
951 dev->trans_start = jiffies;
952 dev_kfree_skb(skb);
953 }
954 if (TX_BUFFS_AVAIL)
955 netif_start_queue(dev);
956 } else
957 status = -1;
958
959 out:
960 return status;
961}
962
963/*
964** The DEPCA interrupt handler.
965*/
966static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
967{
968 struct net_device *dev = dev_id;
969 struct depca_private *lp;
970 s16 csr0, nicsr;
971 u_long ioaddr;
972
973 if (dev == NULL) {
974 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
975 return IRQ_NONE;
976 }
977
978 lp = (struct depca_private *) dev->priv;
979 ioaddr = dev->base_addr;
980
981 spin_lock(&lp->lock);
982
983 /* mask the DEPCA board interrupts and turn on the LED */
984 nicsr = inb(DEPCA_NICSR);
985 nicsr |= (IM | LED);
986 outb(nicsr, DEPCA_NICSR);
987
988 outw(CSR0, DEPCA_ADDR);
989 csr0 = inw(DEPCA_DATA);
990
991 /* Acknowledge all of the current interrupt sources ASAP. */
992 outw(csr0 & INTE, DEPCA_DATA);
993
994 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
995 depca_rx(dev);
996
997 if (csr0 & TINT) /* Tx interrupt (packet sent) */
998 depca_tx(dev);
999
1000 /* Any resources available? */
1001 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1002 netif_wake_queue(dev);
1003 }
1004
1005 /* Unmask the DEPCA board interrupts and turn off the LED */
1006 nicsr = (nicsr & ~IM & ~LED);
1007 outb(nicsr, DEPCA_NICSR);
1008
1009 spin_unlock(&lp->lock);
1010 return IRQ_HANDLED;
1011}
1012
1013/* Called with lp->lock held */
1014static int depca_rx(struct net_device *dev)
1015{
1016 struct depca_private *lp = (struct depca_private *) dev->priv;
1017 int i, entry;
1018 s32 status;
1019
1020 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1021 status = readl(&lp->rx_ring[entry].base) >> 16;
1022 if (status & R_STP) { /* Remember start of frame */
1023 lp->rx_old = entry;
1024 }
1025 if (status & R_ENP) { /* Valid frame status */
1026 if (status & R_ERR) { /* There was an error. */
1027 lp->stats.rx_errors++; /* Update the error stats. */
1028 if (status & R_FRAM)
1029 lp->stats.rx_frame_errors++;
1030 if (status & R_OFLO)
1031 lp->stats.rx_over_errors++;
1032 if (status & R_CRC)
1033 lp->stats.rx_crc_errors++;
1034 if (status & R_BUFF)
1035 lp->stats.rx_fifo_errors++;
1036 } else {
1037 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1038 struct sk_buff *skb;
1039
1040 skb = dev_alloc_skb(pkt_len + 2);
1041 if (skb != NULL) {
1042 unsigned char *buf;
1043 skb_reserve(skb, 2); /* 16 byte align the IP header */
1044 buf = skb_put(skb, pkt_len);
1045 skb->dev = dev;
1046 if (entry < lp->rx_old) { /* Wrapped buffer */
1047 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1048 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1049 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1050 } else { /* Linear buffer */
1051 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1052 }
1053
1054 /*
1055 ** Notify the upper protocol layers that there is another
1056 ** packet to handle
1057 */
1058 skb->protocol = eth_type_trans(skb, dev);
1059 netif_rx(skb);
1060
1061 /*
1062 ** Update stats
1063 */
1064 dev->last_rx = jiffies;
1065 lp->stats.rx_packets++;
1066 lp->stats.rx_bytes += pkt_len;
1067 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1068 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1069 lp->pktStats.bins[i]++;
1070 i = DEPCA_PKT_STAT_SZ;
1071 }
1072 }
1073 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1074 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1075 lp->pktStats.broadcast++;
1076 } else {
1077 lp->pktStats.multicast++;
1078 }
1079 } 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])) {
1080 lp->pktStats.unicast++;
1081 }
1082
1083 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1084 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1085 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1086 }
1087 } else {
1088 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1089 lp->stats.rx_dropped++; /* Really, deferred. */
1090 break;
1091 }
1092 }
1093 /* Change buffer ownership for this last frame, back to the adapter */
1094 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1095 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1096 }
1097 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1098 }
1099
1100 /*
1101 ** Update entry information
1102 */
1103 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1104 }
1105
1106 return 0;
1107}
1108
1109/*
1110** Buffer sent - check for buffer errors.
1111** Called with lp->lock held
1112*/
1113static int depca_tx(struct net_device *dev)
1114{
1115 struct depca_private *lp = (struct depca_private *) dev->priv;
1116 int entry;
1117 s32 status;
1118 u_long ioaddr = dev->base_addr;
1119
1120 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1121 status = readl(&lp->tx_ring[entry].base) >> 16;
1122
1123 if (status < 0) { /* Packet not yet sent! */
1124 break;
1125 } else if (status & T_ERR) { /* An error occurred. */
1126 status = readl(&lp->tx_ring[entry].misc);
1127 lp->stats.tx_errors++;
1128 if (status & TMD3_RTRY)
1129 lp->stats.tx_aborted_errors++;
1130 if (status & TMD3_LCAR)
1131 lp->stats.tx_carrier_errors++;
1132 if (status & TMD3_LCOL)
1133 lp->stats.tx_window_errors++;
1134 if (status & TMD3_UFLO)
1135 lp->stats.tx_fifo_errors++;
1136 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1137 /* Trigger an immediate send demand. */
1138 outw(CSR0, DEPCA_ADDR);
1139 outw(INEA | TDMD, DEPCA_DATA);
1140 }
1141 } else if (status & (T_MORE | T_ONE)) {
1142 lp->stats.collisions++;
1143 } else {
1144 lp->stats.tx_packets++;
1145 }
1146
1147 /* Update all the pointers */
1148 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1149 }
1150
1151 return 0;
1152}
1153
1154static int depca_close(struct net_device *dev)
1155{
1156 struct depca_private *lp = (struct depca_private *) dev->priv;
1157 s16 nicsr;
1158 u_long ioaddr = dev->base_addr;
1159
1160 netif_stop_queue(dev);
1161
1162 outw(CSR0, DEPCA_ADDR);
1163
1164 if (depca_debug > 1) {
1165 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1166 }
1167
1168 /*
1169 ** We stop the DEPCA here -- it occasionally polls
1170 ** memory if we don't.
1171 */
1172 outw(STOP, DEPCA_DATA);
1173
1174 /*
1175 ** Give back the ROM in case the user wants to go to DOS
1176 */
1177 if (lp->adapter != DEPCA) {
1178 nicsr = inb(DEPCA_NICSR);
1179 nicsr &= ~SHE;
1180 outb(nicsr, DEPCA_NICSR);
1181 }
1182
1183 /*
1184 ** Free the associated irq
1185 */
1186 free_irq(dev->irq, dev);
1187 return 0;
1188}
1189
1190static void LoadCSRs(struct net_device *dev)
1191{
1192 struct depca_private *lp = (struct depca_private *) dev->priv;
1193 u_long ioaddr = dev->base_addr;
1194
1195 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1196 outw((u16) lp->device_ram_start, DEPCA_DATA);
1197 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1198 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1199 outw(CSR3, DEPCA_ADDR); /* ALE control */
1200 outw(ACON, DEPCA_DATA);
1201
1202 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1203
1204 return;
1205}
1206
1207static int InitRestartDepca(struct net_device *dev)
1208{
1209 struct depca_private *lp = (struct depca_private *) dev->priv;
1210 u_long ioaddr = dev->base_addr;
1211 int i, status = 0;
1212
1213 /* Copy the shadow init_block to shared memory */
1214 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1215
1216 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1217 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1218
1219 /* wait for lance to complete initialisation */
1220 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1221
1222 if (i != 100) {
1223 /* clear IDON by writing a "1", enable interrupts and start lance */
1224 outw(IDON | INEA | STRT, DEPCA_DATA);
1225 if (depca_debug > 2) {
1226 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1227 }
1228 } else {
1229 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230 status = -1;
1231 }
1232
1233 return status;
1234}
1235
1236static struct net_device_stats *depca_get_stats(struct net_device *dev)
1237{
1238 struct depca_private *lp = (struct depca_private *) dev->priv;
1239
1240 /* Null body since there is no framing error counter */
1241
1242 return &lp->stats;
1243}
1244
1245/*
1246** Set or clear the multicast filter for this adaptor.
1247*/
1248static void set_multicast_list(struct net_device *dev)
1249{
1250 struct depca_private *lp = (struct depca_private *) dev->priv;
1251 u_long ioaddr = dev->base_addr;
1252
1253 if (dev) {
1254 netif_stop_queue(dev);
1255 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1256
1257 STOP_DEPCA; /* Temporarily stop the depca. */
1258 depca_init_ring(dev); /* Initialize the descriptor rings */
1259
1260 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1261 lp->init_block.mode |= PROM;
1262 } else {
1263 SetMulticastFilter(dev);
1264 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1265 }
1266
1267 LoadCSRs(dev); /* Reload CSR3 */
1268 InitRestartDepca(dev); /* Resume normal operation. */
1269 netif_start_queue(dev); /* Unlock the TX ring */
1270 }
1271}
1272
1273/*
1274** Calculate the hash code and update the logical address filter
1275** from a list of ethernet multicast addresses.
1276** Big endian crc one liner is mine, all mine, ha ha ha ha!
1277** LANCE calculates its hash codes big endian.
1278*/
1279static void SetMulticastFilter(struct net_device *dev)
1280{
1281 struct depca_private *lp = (struct depca_private *) dev->priv;
1282 struct dev_mc_list *dmi = dev->mc_list;
1283 char *addrs;
1284 int i, j, bit, byte;
1285 u16 hashcode;
1286 u32 crc;
1287
1288 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1289 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1290 lp->init_block.mcast_table[i] = (char) 0xff;
1291 }
1292 } else {
1293 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1294 lp->init_block.mcast_table[i] = 0;
1295 }
1296 /* Add multicast addresses */
1297 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1298 addrs = dmi->dmi_addr;
1299 dmi = dmi->next;
1300 if ((*addrs & 0x01) == 1) { /* multicast address? */
1301 crc = ether_crc(ETH_ALEN, addrs);
1302 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1303 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1304 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1305 }
1306
1307
1308 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1309 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1310 lp->init_block.mcast_table[byte] |= bit;
1311 }
1312 }
1313 }
1314
1315 return;
1316}
1317
1318static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1319{
1320 int status = 0;
1321
1322 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1323 status = -EBUSY;
1324 goto out;
1325 }
1326
1327 if (DevicePresent(ioaddr)) {
1328 status = -ENODEV;
1329 goto out_release;
1330 }
1331
1332 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1333 status = -ENOMEM;
1334 goto out_release;
1335 }
1336
1337 return 0;
1338
1339 out_release:
1340 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1341 out:
1342 return status;
1343}
1344
1345#ifdef CONFIG_MCA
1346/*
1347** Microchannel bus I/O device probe
1348*/
1349static int __init depca_mca_probe(struct device *device)
1350{
1351 unsigned char pos[2];
1352 unsigned char where;
1353 unsigned long iobase, mem_start;
1354 int irq, err;
1355 struct mca_device *mdev = to_mca_device (device);
1356 struct net_device *dev;
1357 struct depca_private *lp;
1358
1359 /*
1360 ** Search for the adapter. If an address has been given, search
1361 ** specifically for the card at that address. Otherwise find the
1362 ** first card in the system.
1363 */
1364
1365 pos[0] = mca_device_read_stored_pos(mdev, 2);
1366 pos[1] = mca_device_read_stored_pos(mdev, 3);
1367
1368 /*
1369 ** IO of card is handled by bits 1 and 2 of pos0.
1370 **
1371 ** bit2 bit1 IO
1372 ** 0 0 0x2c00
1373 ** 0 1 0x2c10
1374 ** 1 0 0x2c20
1375 ** 1 1 0x2c30
1376 */
1377 where = (pos[0] & 6) >> 1;
1378 iobase = 0x2c00 + (0x10 * where);
1379
1380 /*
1381 ** Found the adapter we were looking for. Now start setting it up.
1382 **
1383 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1384 ** of pos1. Bits are as follows (from the ADF file):
1385 **
1386 ** Bits
1387 ** 3 2 1 0 IRQ
1388 ** --------------------
1389 ** 0 0 1 0 5
1390 ** 0 0 0 1 9
1391 ** 0 1 0 0 10
1392 ** 1 0 0 0 11
1393 */
1394 where = pos[1] & 0x0f;
1395 switch (where) {
1396 case 1:
1397 irq = 9;
1398 break;
1399 case 2:
1400 irq = 5;
1401 break;
1402 case 4:
1403 irq = 10;
1404 break;
1405 case 8:
1406 irq = 11;
1407 break;
1408 default:
1409 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", dev->name, where);
1410 return -EINVAL;
1411 }
1412
1413 /*
1414 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1415 ** They are mapped as follows:
1416 **
1417 ** Bit
1418 ** 5 4 3 Memory Addresses
1419 ** 0 0 0 C0000-CFFFF (64K)
1420 ** 1 0 0 C8000-CFFFF (32K)
1421 ** 0 0 1 D0000-DFFFF (64K)
1422 ** 1 0 1 D8000-DFFFF (32K)
1423 ** 0 1 0 E0000-EFFFF (64K)
1424 ** 1 1 0 E8000-EFFFF (32K)
1425 */
1426 where = (pos[0] & 0x18) >> 3;
1427 mem_start = 0xc0000 + (where * 0x10000);
1428 if (pos[0] & 0x20) {
1429 mem_start += 0x8000;
1430 }
1431
1432 /* claim the slot */
1433 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1434 sizeof(mdev->name));
1435 mca_device_set_claim(mdev, 1);
1436
1437 /*
1438 ** Get everything allocated and initialized... (almost just
1439 ** like the ISA and EISA probes)
1440 */
1441 irq = mca_device_transform_irq(mdev, irq);
1442 iobase = mca_device_transform_ioport(mdev, iobase);
1443
1444 if ((err = depca_common_init (iobase, &dev)))
1445 goto out_unclaim;
1446
1447 dev->irq = irq;
1448 dev->base_addr = iobase;
1449 lp = dev->priv;
1450 lp->depca_bus = DEPCA_BUS_MCA;
1451 lp->adapter = depca_mca_adapter_type[mdev->index];
1452 lp->mem_start = mem_start;
1453
1454 if ((err = depca_hw_init(dev, device)))
1455 goto out_free;
1456
1457 return 0;
1458
1459 out_free:
1460 free_netdev (dev);
1461 release_region (iobase, DEPCA_TOTAL_SIZE);
1462 out_unclaim:
1463 mca_device_set_claim(mdev, 0);
1464
1465 return err;
1466}
1467#endif
1468
1469/*
1470** ISA bus I/O device probe
1471*/
1472
1da177e4
LT		 1473static void __init depca_platform_probe (void)
1474{
1475 int i;
1476 struct platform_device *pldev;
1477
1478 for (i = 0; depca_io_ports[i].iobase; i++) {
1479 depca_io_ports[i].device = NULL;
1480
1481 /* if an address has been specified on the command
1482 * line, use it (if valid) */
1483 if (io && io != depca_io_ports[i].iobase)
1484 continue;
5d994b7f
RK		 1485
1486 pldev = platform_device_alloc(depca_string, i);
1487 if (!pldev)
1da177e4
LT		 1488 continue;
1489
1da177e4 1490 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1da177e4
LT		 1491 depca_io_ports[i].device = pldev;
1492
5d994b7f
RK		 1493 if (platform_device_add(pldev)) {
1494 platform_device_put(pldev);
1da177e4
LT		 1495 depca_io_ports[i].device = NULL;
1496 continue;
1497 }
1498
1499 if (!pldev->dev.driver) {
1500 /* The driver was not bound to this device, there was
1501 * no hardware at this address. Unregister it, as the
1502 * release fuction will take care of freeing the
1503 * allocated structure */
1504
1505 depca_io_ports[i].device = NULL;
5d994b7f 1506 pldev->dev.platform_data = NULL;
1da177e4
LT		 1507 platform_device_unregister (pldev);
1508 }
1509 }
1510}
1511
1512static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1513{
1514 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1515 enum depca_type adapter = unknown;
1516 int i;
1517
1518 for (i = 0; mem_base[i]; i++) {
1519 *mem_start = mem ? mem : mem_base[i];
1520 adapter = DepcaSignature (adapter_name, *mem_start);
1521 if (adapter != unknown)
1522 break;
1523 }
1524
1525 return adapter;
1526}
1527
1528static int __init depca_isa_probe (struct device *device)
1529{
1530 struct net_device *dev;
1531 struct depca_private *lp;
1532 u_long ioaddr, mem_start = 0;
1533 enum depca_type adapter = unknown;
1534 int status = 0;
1535
1536 ioaddr = (u_long) device->platform_data;
1537
1538 if ((status = depca_common_init (ioaddr, &dev)))
1539 goto out;
1540
1541 adapter = depca_shmem_probe (&mem_start);
1542
1543 if (adapter == unknown) {
1544 status = -ENODEV;
1545 goto out_free;
1546 }
1547
1548 dev->base_addr = ioaddr;
1549 dev->irq = irq; /* Use whatever value the user gave
1550 * us, and 0 if he didn't. */
1551 lp = dev->priv;
1552 lp->depca_bus = DEPCA_BUS_ISA;
1553 lp->adapter = adapter;
1554 lp->mem_start = mem_start;
1555
1556 if ((status = depca_hw_init(dev, device)))
1557 goto out_free;
1558
1559 return 0;
1560
1561 out_free:
1562 free_netdev (dev);
1563 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1564 out:
1565 return status;
1566}
1567
1568/*
1569** EISA callbacks from sysfs.
1570*/
1571
1572#ifdef CONFIG_EISA
1573static int __init depca_eisa_probe (struct device *device)
1574{
1575 struct eisa_device *edev;
1576 struct net_device *dev;
1577 struct depca_private *lp;
1578 u_long ioaddr, mem_start;
1579 int status = 0;
1580
1581 edev = to_eisa_device (device);
1582 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1583
1584 if ((status = depca_common_init (ioaddr, &dev)))
1585 goto out;
1586
1587 /* It would have been nice to get card configuration from the
1588 * card. Unfortunately, this register is write-only (shares
1589 * it's address with the ethernet prom)... As we don't parse
1590 * the EISA configuration structures (yet... :-), just rely on
1591 * the ISA probing to sort it out... */
1592
1593 depca_shmem_probe (&mem_start);
1594
1595 dev->base_addr = ioaddr;
1596 dev->irq = irq;
1597 lp = dev->priv;
1598 lp->depca_bus = DEPCA_BUS_EISA;
1599 lp->adapter = edev->id.driver_data;
1600 lp->mem_start = mem_start;
1601
1602 if ((status = depca_hw_init(dev, device)))
1603 goto out_free;
1604
1605 return 0;
1606
1607 out_free:
1608 free_netdev (dev);
1609 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1610 out:
1611 return status;
1612}
1613#endif
1614
1615static int __devexit depca_device_remove (struct device *device)
1616{
1617 struct net_device *dev;
1618 struct depca_private *lp;
1619 int bus;
1620
1621 dev = device->driver_data;
1622 lp = dev->priv;
1623
1624 unregister_netdev (dev);
1625 iounmap (lp->sh_mem);
1626 release_mem_region (lp->mem_start, lp->mem_len);
1627 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1628 bus = lp->depca_bus;
1629 free_netdev (dev);
1630
1631 return 0;
1632}
1633
1634/*
1635** Look for a particular board name in the on-board Remote Diagnostics
1636** and Boot (readb) ROM. This will also give us a clue to the network RAM
1637** base address.
1638*/
1639static int __init DepcaSignature(char *name, u_long base_addr)
1640{
1641 u_int i, j, k;
1642 void __iomem *ptr;
1643 char tmpstr[16];
1644 u_long prom_addr = base_addr + 0xc000;
1645 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1646
1647 /* Can't reserve the prom region, it is already marked as
1648 * used, at least on x86. Instead, reserve a memory region a
1649 * board would certainly use. If it works, go ahead. If not,
1650 * run like hell... */
1651
1652 if (!request_mem_region (mem_addr, 16, depca_string))
1653 return unknown;
1654
1655 /* Copy the first 16 bytes of ROM */
1656
1657 ptr = ioremap(prom_addr, 16);
1658 if (ptr == NULL) {
1659 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1660 return unknown;
1661 }
1662 for (i = 0; i < 16; i++) {
1663 tmpstr[i] = readb(ptr + i);
1664 }
1665 iounmap(ptr);
1666
1667 release_mem_region (mem_addr, 16);
1668
1669 /* Check if PROM contains a valid string */
1670 for (i = 0; *depca_signature[i] != '\0'; i++) {
1671 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1672 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1673 k++;
1674 } else { /* lost signature; begin search again */
1675 k = 0;
1676 }
1677 }
1678 if (k == strlen(depca_signature[i]))
1679 break;
1680 }
1681
1682 /* Check if name string is valid, provided there's no PROM */
1683 if (name && *name && (i == unknown)) {
1684 for (i = 0; *depca_signature[i] != '\0'; i++) {
1685 if (strcmp(name, depca_signature[i]) == 0)
1686 break;
1687 }
1688 }
1689
1690 return i;
1691}
1692
1693/*
1694** Look for a special sequence in the Ethernet station address PROM that
1695** is common across all DEPCA products. Note that the original DEPCA needs
1696** its ROM address counter to be initialized and enabled. Only enable
1697** if the first address octet is a 0x08 - this minimises the chances of
1698** messing around with some other hardware, but it assumes that this DEPCA
1699** card initialized itself correctly.
1700**
1701** Search the Ethernet address ROM for the signature. Since the ROM address
1702** counter can start at an arbitrary point, the search must include the entire
1703** probe sequence length plus the (length_of_the_signature - 1).
1704** Stop the search IMMEDIATELY after the signature is found so that the
1705** PROM address counter is correctly positioned at the start of the
1706** ethernet address for later read out.
1707*/
1708static int __init DevicePresent(u_long ioaddr)
1709{
1710 union {
1711 struct {
1712 u32 a;
1713 u32 b;
1714 } llsig;
1715 char Sig[sizeof(u32) << 1];
1716 }
1717 dev;
1718 short sigLength = 0;
1719 s8 data;
1720 s16 nicsr;
1721 int i, j, status = 0;
1722
1723 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1724 data = inb(DEPCA_PROM); /* read data */
1725
1726 if (data == 0x08) { /* Enable counter on DEPCA */
1727 nicsr = inb(DEPCA_NICSR);
1728 nicsr |= AAC;
1729 outb(nicsr, DEPCA_NICSR);
1730 }
1731
1732 dev.llsig.a = ETH_PROM_SIG;
1733 dev.llsig.b = ETH_PROM_SIG;
1734 sigLength = sizeof(u32) << 1;
1735
1736 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1737 data = inb(DEPCA_PROM);
1738 if (dev.Sig[j] == data) { /* track signature */
1739 j++;
1740 } else { /* lost signature; begin search again */
1741 if (data == dev.Sig[0]) { /* rare case.... */
1742 j = 1;
1743 } else {
1744 j = 0;
1745 }
1746 }
1747 }
1748
1749 if (j != sigLength) {
1750 status = -ENODEV; /* search failed */
1751 }
1752
1753 return status;
1754}
1755
1756/*
1757** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1758** reason: access the upper half of the PROM with x=0; access the lower half
1759** with x=1.
1760*/
1761static int __init get_hw_addr(struct net_device *dev)
1762{
1763 u_long ioaddr = dev->base_addr;
1764 struct depca_private *lp = dev->priv;
1765 int i, k, tmp, status = 0;
1766 u_short j, x, chksum;
1767
1768 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1769
1770 for (i = 0, k = 0, j = 0; j < 3; j++) {
1771 k <<= 1;
1772 if (k > 0xffff)
1773 k -= 0xffff;
1774
1775 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1776 dev->dev_addr[i++] = (u_char) tmp;
1777 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1778 dev->dev_addr[i++] = (u_char) tmp;
1779
1780 if (k > 0xffff)
1781 k -= 0xffff;
1782 }
1783 if (k == 0xffff)
1784 k = 0;
1785
1786 chksum = (u_char) inb(DEPCA_PROM + x);
1787 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1788 if (k != chksum)
1789 status = -1;
1790
1791 return status;
1792}
1793
1794/*
1795** Load a packet into the shared memory
1796*/
1797static int load_packet(struct net_device *dev, struct sk_buff *skb)
1798{
1799 struct depca_private *lp = (struct depca_private *) dev->priv;
1800 int i, entry, end, len, status = 0;
1801
1802 entry = lp->tx_new; /* Ring around buffer number. */
1803 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1804 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1805 /*
1806 ** Caution: the write order is important here... don't set up the
1807 ** ownership rights until all the other information is in place.
1808 */
1809 if (end < entry) { /* wrapped buffer */
1810 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1811 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1812 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1813 } else { /* linear buffer */
1814 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1815 }
1816
1817 /* set up the buffer descriptors */
1818 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1819 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1820 /* clean out flags */
1821 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1822 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1823 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1824 len -= TX_BUFF_SZ;
1825 }
1826 /* clean out flags */
1827 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1828 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1829 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1830
1831 /* start of packet */
1832 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1833 /* end of packet */
1834 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1835
1836 for (i = end; i != entry; --i) {
1837 /* ownership of packet */
1838 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1839 if (i == 0)
1840 i = lp->txRingMask + 1;
1841 }
1842 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1843
1844 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1845 } else {
1846 status = -1;
1847 }
1848
1849 return status;
1850}
1851
1852static void depca_dbg_open(struct net_device *dev)
1853{
1854 struct depca_private *lp = (struct depca_private *) dev->priv;
1855 u_long ioaddr = dev->base_addr;
1856 struct depca_init *p = &lp->init_block;
1857 int i;
1858
1859 if (depca_debug > 1) {
1860 /* Do not copy the shadow init block into shared memory */
1861 /* Debugging should not affect normal operation! */
1862 /* The shadow init block will get copied across during InitRestartDepca */
1863 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1864 printk("Descriptor head addresses (CPU):\n");
1865 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1866 printk("Descriptor addresses (CPU):\nRX: ");
1867 for (i = 0; i < lp->rxRingMask; i++) {
1868 if (i < 3) {
1869 printk("%p ", &lp->rx_ring[i].base);
1870 }
1871 }
1872 printk("...%p\n", &lp->rx_ring[i].base);
1873 printk("TX: ");
1874 for (i = 0; i < lp->txRingMask; i++) {
1875 if (i < 3) {
1876 printk("%p ", &lp->tx_ring[i].base);
1877 }
1878 }
1879 printk("...%p\n", &lp->tx_ring[i].base);
1880 printk("\nDescriptor buffers (Device):\nRX: ");
1881 for (i = 0; i < lp->rxRingMask; i++) {
1882 if (i < 3) {
1883 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1884 }
1885 }
1886 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1887 printk("TX: ");
1888 for (i = 0; i < lp->txRingMask; i++) {
1889 if (i < 3) {
1890 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1891 }
1892 }
1893 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1894 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1895 printk(" mode: 0x%4.4x\n", p->mode);
1896 printk(" physical address: ");
1897 for (i = 0; i < ETH_ALEN - 1; i++) {
1898 printk("%2.2x:", p->phys_addr[i]);
1899 }
1900 printk("%2.2x\n", p->phys_addr[i]);
1901 printk(" multicast hash table: ");
1902 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1903 printk("%2.2x:", p->mcast_table[i]);
1904 }
1905 printk("%2.2x\n", p->mcast_table[i]);
1906 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1907 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1908 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1909 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1910 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1911 outw(CSR2, DEPCA_ADDR);
1912 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1913 outw(CSR1, DEPCA_ADDR);
1914 printk("%4.4x\n", inw(DEPCA_DATA));
1915 outw(CSR3, DEPCA_ADDR);
1916 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1917 }
1918
1919 return;
1920}
1921
1922/*
1923** Perform IOCTL call functions here. Some are privileged operations and the
1924** effective uid is checked in those cases.
1925** All multicast IOCTLs will not work here and are for testing purposes only.
1926*/
1927static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1928{
1929 struct depca_private *lp = (struct depca_private *) dev->priv;
1930 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1931 int i, status = 0;
1932 u_long ioaddr = dev->base_addr;
1933 union {
1934 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1935 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1936 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1937 } tmp;
1938 unsigned long flags;
1939 void *buf;
1940
1941 switch (ioc->cmd) {
1942 case DEPCA_GET_HWADDR: /* Get the hardware address */
1943 for (i = 0; i < ETH_ALEN; i++) {
1944 tmp.addr[i] = dev->dev_addr[i];
1945 }
1946 ioc->len = ETH_ALEN;
1947 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1948 return -EFAULT;
1949 break;
1950
1951 case DEPCA_SET_HWADDR: /* Set the hardware address */
1952 if (!capable(CAP_NET_ADMIN))
1953 return -EPERM;
1954 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1955 return -EFAULT;
1956 for (i = 0; i < ETH_ALEN; i++) {
1957 dev->dev_addr[i] = tmp.addr[i];
1958 }
1959 netif_stop_queue(dev);
1960 while (lp->tx_old != lp->tx_new)
1961 cpu_relax(); /* Wait for the ring to empty */
1962
1963 STOP_DEPCA; /* Temporarily stop the depca. */
1964 depca_init_ring(dev); /* Initialize the descriptor rings */
1965 LoadCSRs(dev); /* Reload CSR3 */
1966 InitRestartDepca(dev); /* Resume normal operation. */
1967 netif_start_queue(dev); /* Unlock the TX ring */
1968 break;
1969
1970 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1971 if (!capable(CAP_NET_ADMIN))
1972 return -EPERM;
1973 netif_stop_queue(dev);
1974 while (lp->tx_old != lp->tx_new)
1975 cpu_relax(); /* Wait for the ring to empty */
1976
1977 STOP_DEPCA; /* Temporarily stop the depca. */
1978 depca_init_ring(dev); /* Initialize the descriptor rings */
1979 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1980
1981 LoadCSRs(dev); /* Reload CSR3 */
1982 InitRestartDepca(dev); /* Resume normal operation. */
1983 netif_start_queue(dev); /* Unlock the TX ring */
1984 break;
1985
1986 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1987 if (!capable(CAP_NET_ADMIN))
1988 return -EPERM;
1989 netif_stop_queue(dev);
1990 while (lp->tx_old != lp->tx_new)
1991 cpu_relax(); /* Wait for the ring to empty */
1992
1993 STOP_DEPCA; /* Temporarily stop the depca. */
1994 depca_init_ring(dev); /* Initialize the descriptor rings */
1995 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1996
1997 LoadCSRs(dev); /* Reload CSR3 */
1998 InitRestartDepca(dev); /* Resume normal operation. */
1999 netif_start_queue(dev); /* Unlock the TX ring */
2000 break;
2001
2002 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2003 if(!capable(CAP_NET_ADMIN))
2004 return -EPERM;
2005 printk("%s: Boo!\n", dev->name);
2006 break;
2007
2008 case DEPCA_GET_MCA: /* Get the multicast address table */
2009 ioc->len = (HASH_TABLE_LEN >> 3);
2010 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2011 return -EFAULT;
2012 break;
2013
2014 case DEPCA_SET_MCA: /* Set a multicast address */
2015 if (!capable(CAP_NET_ADMIN))
2016 return -EPERM;
2017 if (ioc->len >= HASH_TABLE_LEN)
2018 return -EINVAL;
2019 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2020 return -EFAULT;
2021 set_multicast_list(dev);
2022 break;
2023
2024 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2025 if (!capable(CAP_NET_ADMIN))
2026 return -EPERM;
2027 set_multicast_list(dev);
2028 break;
2029
2030 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2031 if (!capable(CAP_NET_ADMIN))
2032 return -EPERM;
2033 set_multicast_list(dev);
2034 break;
2035
2036 case DEPCA_GET_STATS: /* Get the driver statistics */
2037 ioc->len = sizeof(lp->pktStats);
2038 buf = kmalloc(ioc->len, GFP_KERNEL);
2039 if(!buf)
2040 return -ENOMEM;
2041 spin_lock_irqsave(&lp->lock, flags);
2042 memcpy(buf, &lp->pktStats, ioc->len);
2043 spin_unlock_irqrestore(&lp->lock, flags);
2044 if (copy_to_user(ioc->data, buf, ioc->len))
2045 status = -EFAULT;
2046 kfree(buf);
2047 break;
2048
2049 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2050 if (!capable(CAP_NET_ADMIN))
2051 return -EPERM;
2052 spin_lock_irqsave(&lp->lock, flags);
2053 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2054 spin_unlock_irqrestore(&lp->lock, flags);
2055 break;
2056
2057 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2058 i = 0;
2059 tmp.sval[i++] = inw(DEPCA_NICSR);
2060 outw(CSR0, DEPCA_ADDR); /* status register */
2061 tmp.sval[i++] = inw(DEPCA_DATA);
2062 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2063 ioc->len = i + sizeof(struct depca_init);
2064 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2065 return -EFAULT;
2066 break;
2067
2068 default:
2069 return -EOPNOTSUPP;
2070 }
2071
2072 return status;
2073}
2074
2075static int __init depca_module_init (void)
2076{
2077 int err = 0;
2078
2079#ifdef CONFIG_MCA
2080 err = mca_register_driver (&depca_mca_driver);
2081#endif
2082#ifdef CONFIG_EISA
2083 err |= eisa_driver_register (&depca_eisa_driver);
2084#endif
2085 err |= driver_register (&depca_isa_driver);
2086 depca_platform_probe ();
2087
2088 return err;
2089}
2090
2091static void __exit depca_module_exit (void)
2092{
2093 int i;
2094#ifdef CONFIG_MCA
2095 mca_unregister_driver (&depca_mca_driver);
2096#endif
2097#ifdef CONFIG_EISA
2098 eisa_driver_unregister (&depca_eisa_driver);
2099#endif
2100 driver_unregister (&depca_isa_driver);
2101
2102 for (i = 0; depca_io_ports[i].iobase; i++) {
2103 if (depca_io_ports[i].device) {
5d994b7f 2104 depca_io_ports[i].device->dev.platform_data = NULL;
1da177e4
LT		 2105 platform_device_unregister (depca_io_ports[i].device);
2106 depca_io_ports[i].device = NULL;
2107 }
2108 }
2109}
2110
2111module_init (depca_module_init);
2112module_exit (depca_module_exit);
Linux kernel - Deliverables
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