1 /* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
3 Written 1994, 1995 by David C. Davies.
6 Copyright 1994 David C. Davies
8 United States Government
9 (as represented by the Director, National Security Agency).
11 Copyright 1995 Digital Equipment Corporation.
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
40 The author may be reached at davies@maniac.ultranet.com
42 =========================================================================
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
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.
98 ************************************************************************
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.
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
111 ************************************************************************
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
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
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
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
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.
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
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).
162 Currently known bugs/limitations:
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
170 ************************************************************************
178 Version Date Description
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
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().
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
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>
235 =========================================================================
238 #include <linux/module.h>
239 #include <linux/kernel.h>
240 #include <linux/string.h>
241 #include <linux/errno.h>
242 #include <linux/ioport.h>
243 #include <linux/slab.h>
244 #include <linux/interrupt.h>
245 #include <linux/delay.h>
246 #include <linux/init.h>
247 #include <linux/crc32.h>
248 #include <linux/netdevice.h>
249 #include <linux/etherdevice.h>
250 #include <linux/skbuff.h>
251 #include <linux/time.h>
252 #include <linux/types.h>
253 #include <linux/unistd.h>
254 #include <linux/ctype.h>
255 #include <linux/moduleparam.h>
256 #include <linux/platform_device.h>
257 #include <linux/bitops.h>
259 #include <asm/uaccess.h>
264 #include <linux/mca.h>
268 #include <linux/eisa.h>
273 static char version
[] __initdata
= "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
276 static int depca_debug
= DEPCA_DEBUG
;
278 static int depca_debug
= 1;
281 #define DEPCA_NDA 0xffe0 /* No Device Address */
283 #define TX_TIMEOUT (1*HZ)
286 ** Ethernet PROM defines
288 #define PROBE_LENGTH 32
289 #define ETH_PROM_SIG 0xAA5500FFUL
292 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
293 ** here is <= to the amount of shared memory set up by the board switches.
294 ** The number of descriptors MUST BE A POWER OF 2.
296 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
298 #define NUM_RX_DESC 8 /* Number of RX descriptors */
299 #define NUM_TX_DESC 8 /* Number of TX descriptors */
300 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
301 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
306 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
311 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
312 #define DEPCA_TOTAL_SIZE 0x10
316 struct platform_device
*device
;
317 } depca_io_ports
[] = {
324 ** Name <-> Adapter mapping
326 #define DEPCA_SIGNATURE {"DEPCA",\
328 "DE200","DE201","DE202",\
333 static char* __initdata depca_signature
[] = DEPCA_SIGNATURE
;
336 DEPCA
, de100
, de101
, de200
, de201
, de202
, de210
, de212
, de422
, unknown
339 static char depca_string
[] = "depca";
341 static int depca_device_remove (struct device
*device
);
344 static struct eisa_device_id depca_eisa_ids
[] = {
345 { "DEC4220", de422
},
348 MODULE_DEVICE_TABLE(eisa
, depca_eisa_ids
);
350 static int depca_eisa_probe (struct device
*device
);
352 static struct eisa_driver depca_eisa_driver
= {
353 .id_table
= depca_eisa_ids
,
355 .name
= depca_string
,
356 .probe
= depca_eisa_probe
,
357 .remove
= __devexit_p (depca_device_remove
)
364 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
366 #define DE210_ID 0x628d
367 #define DE212_ID 0x6def
369 static short depca_mca_adapter_ids
[] = {
375 static char *depca_mca_adapter_name
[] = {
376 "DEC EtherWORKS MC Adapter (DE210)",
377 "DEC EtherWORKS MC Adapter (DE212)",
381 static enum depca_type depca_mca_adapter_type
[] = {
387 static int depca_mca_probe (struct device
*);
389 static struct mca_driver depca_mca_driver
= {
390 .id_table
= depca_mca_adapter_ids
,
392 .name
= depca_string
,
393 .bus
= &mca_bus_type
,
394 .probe
= depca_mca_probe
,
395 .remove
= __devexit_p(depca_device_remove
),
400 static int depca_isa_probe (struct platform_device
*);
402 static int __devexit
depca_isa_remove(struct platform_device
*pdev
)
404 return depca_device_remove(&pdev
->dev
);
407 static struct platform_driver depca_isa_driver
= {
408 .probe
= depca_isa_probe
,
409 .remove
= __devexit_p(depca_isa_remove
),
411 .name
= depca_string
,
416 ** Miscellaneous info...
418 #define DEPCA_STRLEN 16
421 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
422 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
423 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
424 ** and hence the RX descriptor ring's first entry.
426 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
427 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
428 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
431 ** The DEPCA Rx and Tx ring descriptors.
433 struct depca_rx_desc
{
435 s16 buf_length
; /* This length is negative 2's complement! */
436 s16 msg_length
; /* This length is "normal". */
439 struct depca_tx_desc
{
441 s16 length
; /* This length is negative 2's complement! */
442 s16 misc
; /* Errors and TDR info */
445 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
446 to LANCE memory address space */
449 ** The Lance initialization block, described in databook, in common memory.
452 u16 mode
; /* Mode register */
453 u8 phys_addr
[ETH_ALEN
]; /* Physical ethernet address */
454 u8 mcast_table
[8]; /* Multicast Hash Table. */
455 u32 rx_ring
; /* Rx ring base pointer & ring length */
456 u32 tx_ring
; /* Tx ring base pointer & ring length */
459 #define DEPCA_PKT_STAT_SZ 16
460 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
461 increase DEPCA_PKT_STAT_SZ */
462 struct depca_private
{
463 char adapter_name
[DEPCA_STRLEN
]; /* /proc/ioports string */
464 enum depca_type adapter
; /* Adapter type */
469 } depca_bus
; /* type of bus */
470 struct depca_init init_block
; /* Shadow Initialization block */
471 /* CPU address space fields */
472 struct depca_rx_desc __iomem
*rx_ring
; /* Pointer to start of RX descriptor ring */
473 struct depca_tx_desc __iomem
*tx_ring
; /* Pointer to start of TX descriptor ring */
474 void __iomem
*rx_buff
[NUM_RX_DESC
]; /* CPU virt address of sh'd memory buffs */
475 void __iomem
*tx_buff
[NUM_TX_DESC
]; /* CPU virt address of sh'd memory buffs */
476 void __iomem
*sh_mem
; /* CPU mapped virt address of device RAM */
477 u_long mem_start
; /* Bus address of device RAM (before remap) */
478 u_long mem_len
; /* device memory size */
479 /* Device address space fields */
480 u_long device_ram_start
; /* Start of RAM in device addr space */
481 /* Offsets used in both address spaces */
482 u_long rx_ring_offset
; /* Offset from start of RAM to rx_ring */
483 u_long tx_ring_offset
; /* Offset from start of RAM to tx_ring */
484 u_long buffs_offset
; /* LANCE Rx and Tx buffers start address. */
485 /* Kernel-only (not device) fields */
486 int rx_new
, tx_new
; /* The next free ring entry */
487 int rx_old
, tx_old
; /* The ring entries to be free()ed. */
489 struct { /* Private stats counters */
490 u32 bins
[DEPCA_PKT_STAT_SZ
];
494 u32 excessive_collisions
;
496 u32 excessive_underruns
;
498 int txRingMask
; /* TX ring mask */
499 int rxRingMask
; /* RX ring mask */
500 s32 rx_rlen
; /* log2(rxRingMask+1) for the descriptors */
501 s32 tx_rlen
; /* log2(txRingMask+1) for the descriptors */
505 ** The transmit ring full condition is described by the tx_old and tx_new
507 ** tx_old = tx_new Empty ring
508 ** tx_old = tx_new+1 Full ring
509 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
511 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
512 lp->tx_old+lp->txRingMask-lp->tx_new:\
513 lp->tx_old -lp->tx_new-1)
518 static int depca_open(struct net_device
*dev
);
519 static int depca_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
520 static irqreturn_t
depca_interrupt(int irq
, void *dev_id
);
521 static int depca_close(struct net_device
*dev
);
522 static int depca_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
523 static void depca_tx_timeout(struct net_device
*dev
);
524 static void set_multicast_list(struct net_device
*dev
);
529 static void depca_init_ring(struct net_device
*dev
);
530 static int depca_rx(struct net_device
*dev
);
531 static int depca_tx(struct net_device
*dev
);
533 static void LoadCSRs(struct net_device
*dev
);
534 static int InitRestartDepca(struct net_device
*dev
);
535 static int DepcaSignature(char *name
, u_long paddr
);
536 static int DevicePresent(u_long ioaddr
);
537 static int get_hw_addr(struct net_device
*dev
);
538 static void SetMulticastFilter(struct net_device
*dev
);
539 static int load_packet(struct net_device
*dev
, struct sk_buff
*skb
);
540 static void depca_dbg_open(struct net_device
*dev
);
542 static u_char de1xx_irq
[] __initdata
= { 2, 3, 4, 5, 7, 9, 0 };
543 static u_char de2xx_irq
[] __initdata
= { 5, 9, 10, 11, 15, 0 };
544 static u_char de422_irq
[] __initdata
= { 5, 9, 10, 11, 0 };
545 static u_char
*depca_irq
;
549 static char *adapter_name
;
550 static int mem
; /* For loadable module assignment
551 use insmod mem=0x????? .... */
552 module_param (irq
, int, 0);
553 module_param (io
, int, 0);
554 module_param (adapter_name
, charp
, 0);
555 module_param (mem
, int, 0);
556 MODULE_PARM_DESC(irq
, "DEPCA IRQ number");
557 MODULE_PARM_DESC(io
, "DEPCA I/O base address");
558 MODULE_PARM_DESC(adapter_name
, "DEPCA adapter name");
559 MODULE_PARM_DESC(mem
, "DEPCA shared memory address");
560 MODULE_LICENSE("GPL");
563 ** Miscellaneous defines...
566 outw(CSR0, DEPCA_ADDR);\
567 outw(STOP, DEPCA_DATA)
569 static int __init
depca_hw_init (struct net_device
*dev
, struct device
*device
)
571 struct depca_private
*lp
;
572 int i
, j
, offset
, netRAM
, mem_len
, status
= 0;
578 * We are now supposed to enter this function with the
579 * following fields filled with proper values :
586 * dev->irq can be set if known from device configuration (on
587 * MCA or EISA) or module option. Otherwise, it will be auto
591 ioaddr
= dev
->base_addr
;
595 nicsr
= inb(DEPCA_NICSR
);
596 nicsr
= ((nicsr
& ~SHE
& ~RBE
& ~IEN
) | IM
);
597 outb(nicsr
, DEPCA_NICSR
);
599 if (inw(DEPCA_DATA
) != STOP
) {
603 lp
= (struct depca_private
*) dev
->priv
;
604 mem_start
= lp
->mem_start
;
606 if (!mem_start
|| lp
->adapter
< DEPCA
|| lp
->adapter
>=unknown
)
609 printk ("%s: %s at 0x%04lx",
610 device
->bus_id
, depca_signature
[lp
->adapter
], ioaddr
);
612 switch (lp
->depca_bus
) {
615 printk(" (MCA slot %d)", to_mca_device(device
)->slot
+ 1);
621 printk(" (EISA slot %d)", to_eisa_device(device
)->slot
);
629 printk("Unknown DEPCA bus %d\n", lp
->depca_bus
);
633 printk(", h/w address ");
634 status
= get_hw_addr(dev
);
636 printk(" which has an Ethernet PROM CRC error.\n");
639 for (i
= 0; i
< ETH_ALEN
- 1; i
++) { /* get the ethernet address */
640 printk("%2.2x:", dev
->dev_addr
[i
]);
642 printk("%2.2x", dev
->dev_addr
[i
]);
644 /* Set up the maximum amount of network RAM(kB) */
645 netRAM
= ((lp
->adapter
!= DEPCA
) ? 64 : 48);
646 if ((nicsr
& _128KB
) && (lp
->adapter
== de422
))
649 /* Shared Memory Base Address */
651 nicsr
&= ~BS
; /* DEPCA RAM in top 32k */
654 /* Only EISA/ISA needs start address to be re-computed */
655 if (lp
->depca_bus
!= DEPCA_BUS_MCA
)
659 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
)))
661 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len
>> 10), netRAM
);
665 printk(",\n has %dkB RAM at 0x%.5lx", netRAM
, mem_start
);
667 /* Enable the shadow RAM. */
668 if (lp
->adapter
!= DEPCA
) {
670 outb(nicsr
, DEPCA_NICSR
);
673 spin_lock_init(&lp
->lock
);
674 sprintf(lp
->adapter_name
, "%s (%s)",
675 depca_signature
[lp
->adapter
], device
->bus_id
);
678 /* Initialisation Block */
679 if (!request_mem_region (mem_start
, mem_len
, lp
->adapter_name
)) {
680 printk(KERN_ERR
"depca: cannot request ISA memory, aborting\n");
685 lp
->sh_mem
= ioremap(mem_start
, mem_len
);
686 if (lp
->sh_mem
== NULL
) {
687 printk(KERN_ERR
"depca: cannot remap ISA memory, aborting\n");
691 lp
->mem_start
= mem_start
;
692 lp
->mem_len
= mem_len
;
693 lp
->device_ram_start
= mem_start
& LA_MASK
;
696 offset
+= sizeof(struct depca_init
);
698 /* Tx & Rx descriptors (aligned to a quadword boundary) */
699 offset
= (offset
+ DEPCA_ALIGN
) & ~DEPCA_ALIGN
;
700 lp
->rx_ring
= (struct depca_rx_desc __iomem
*) (lp
->sh_mem
+ offset
);
701 lp
->rx_ring_offset
= offset
;
703 offset
+= (sizeof(struct depca_rx_desc
) * NUM_RX_DESC
);
704 lp
->tx_ring
= (struct depca_tx_desc __iomem
*) (lp
->sh_mem
+ offset
);
705 lp
->tx_ring_offset
= offset
;
707 offset
+= (sizeof(struct depca_tx_desc
) * NUM_TX_DESC
);
709 lp
->buffs_offset
= offset
;
711 /* Finish initialising the ring information. */
712 lp
->rxRingMask
= NUM_RX_DESC
- 1;
713 lp
->txRingMask
= NUM_TX_DESC
- 1;
715 /* Calculate Tx/Rx RLEN size for the descriptors. */
716 for (i
= 0, j
= lp
->rxRingMask
; j
> 0; i
++) {
719 lp
->rx_rlen
= (s32
) (i
<< 29);
720 for (i
= 0, j
= lp
->txRingMask
; j
> 0; i
++) {
723 lp
->tx_rlen
= (s32
) (i
<< 29);
725 /* Load the initialisation block */
726 depca_init_ring(dev
);
728 /* Initialise the control and status registers */
731 /* Enable DEPCA board interrupts for autoprobing */
732 nicsr
= ((nicsr
& ~IM
) | IEN
);
733 outb(nicsr
, DEPCA_NICSR
);
735 /* To auto-IRQ we enable the initialization-done and DMA err,
736 interrupts. For now we will always get a DMA error. */
738 unsigned char irqnum
;
739 unsigned long irq_mask
, delay
;
741 irq_mask
= probe_irq_on();
743 /* Assign the correct irq list */
744 switch (lp
->adapter
) {
748 depca_irq
= de1xx_irq
;
755 depca_irq
= de2xx_irq
;
758 depca_irq
= de422_irq
;
762 break; /* Not reached */
765 /* Trigger an initialization just for the interrupt. */
766 outw(INEA
| INIT
, DEPCA_DATA
);
768 delay
= jiffies
+ HZ
/50;
769 while (time_before(jiffies
, delay
))
772 irqnum
= probe_irq_off(irq_mask
);
776 printk(" and failed to detect IRQ line.\n");
779 for (dev
->irq
= 0, i
= 0; (depca_irq
[i
]) && (!dev
->irq
); i
++)
780 if (irqnum
== depca_irq
[i
]) {
782 printk(" and uses IRQ%d.\n", dev
->irq
);
786 printk(" but incorrect IRQ line detected.\n");
791 printk(" and assigned IRQ%d.\n", dev
->irq
);
794 if (depca_debug
> 1) {
798 /* The DEPCA-specific entries in the device structure. */
799 dev
->open
= &depca_open
;
800 dev
->hard_start_xmit
= &depca_start_xmit
;
801 dev
->stop
= &depca_close
;
802 dev
->set_multicast_list
= &set_multicast_list
;
803 dev
->do_ioctl
= &depca_ioctl
;
804 dev
->tx_timeout
= depca_tx_timeout
;
805 dev
->watchdog_timeo
= TX_TIMEOUT
;
809 device
->driver_data
= dev
;
810 SET_NETDEV_DEV (dev
, device
);
812 status
= register_netdev(dev
);
818 release_mem_region (mem_start
, mem_len
);
824 static int depca_open(struct net_device
*dev
)
826 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
827 u_long ioaddr
= dev
->base_addr
;
832 nicsr
= inb(DEPCA_NICSR
);
834 /* Make sure the shadow RAM is enabled */
835 if (lp
->adapter
!= DEPCA
) {
837 outb(nicsr
, DEPCA_NICSR
);
840 /* Re-initialize the DEPCA... */
841 depca_init_ring(dev
);
846 if (request_irq(dev
->irq
, &depca_interrupt
, 0, lp
->adapter_name
, dev
)) {
847 printk("depca_open(): Requested IRQ%d is busy\n", dev
->irq
);
851 /* Enable DEPCA board interrupts and turn off LED */
852 nicsr
= ((nicsr
& ~IM
& ~LED
) | IEN
);
853 outb(nicsr
, DEPCA_NICSR
);
854 outw(CSR0
, DEPCA_ADDR
);
856 netif_start_queue(dev
);
858 status
= InitRestartDepca(dev
);
860 if (depca_debug
> 1) {
861 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA
));
862 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR
));
868 /* Initialize the lance Rx and Tx descriptor rings. */
869 static void depca_init_ring(struct net_device
*dev
)
871 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
875 /* Lock out other processes whilst setting up the hardware */
876 netif_stop_queue(dev
);
878 lp
->rx_new
= lp
->tx_new
= 0;
879 lp
->rx_old
= lp
->tx_old
= 0;
881 /* Initialize the base address and length of each buffer in the ring */
882 for (i
= 0; i
<= lp
->rxRingMask
; i
++) {
883 offset
= lp
->buffs_offset
+ i
* RX_BUFF_SZ
;
884 writel((lp
->device_ram_start
+ offset
) | R_OWN
, &lp
->rx_ring
[i
].base
);
885 writew(-RX_BUFF_SZ
, &lp
->rx_ring
[i
].buf_length
);
886 lp
->rx_buff
[i
] = lp
->sh_mem
+ offset
;
889 for (i
= 0; i
<= lp
->txRingMask
; i
++) {
890 offset
= lp
->buffs_offset
+ (i
+ lp
->rxRingMask
+ 1) * TX_BUFF_SZ
;
891 writel((lp
->device_ram_start
+ offset
) & 0x00ffffff, &lp
->tx_ring
[i
].base
);
892 lp
->tx_buff
[i
] = lp
->sh_mem
+ offset
;
895 /* Set up the initialization block */
896 lp
->init_block
.rx_ring
= (lp
->device_ram_start
+ lp
->rx_ring_offset
) | lp
->rx_rlen
;
897 lp
->init_block
.tx_ring
= (lp
->device_ram_start
+ lp
->tx_ring_offset
) | lp
->tx_rlen
;
899 SetMulticastFilter(dev
);
901 for (i
= 0; i
< ETH_ALEN
; i
++) {
902 lp
->init_block
.phys_addr
[i
] = dev
->dev_addr
[i
];
905 lp
->init_block
.mode
= 0x0000; /* Enable the Tx and Rx */
909 static void depca_tx_timeout(struct net_device
*dev
)
911 u_long ioaddr
= dev
->base_addr
;
913 printk("%s: transmit timed out, status %04x, resetting.\n", dev
->name
, inw(DEPCA_DATA
));
916 depca_init_ring(dev
);
918 dev
->trans_start
= jiffies
;
919 netif_wake_queue(dev
);
920 InitRestartDepca(dev
);
925 ** Writes a socket buffer to TX descriptor ring and starts transmission
927 static int depca_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
929 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
930 u_long ioaddr
= dev
->base_addr
;
933 /* Transmitter timeout, serious problems. */
937 if (skb_padto(skb
, ETH_ZLEN
))
940 netif_stop_queue(dev
);
942 if (TX_BUFFS_AVAIL
) { /* Fill in a Tx ring entry */
943 status
= load_packet(dev
, skb
);
946 /* Trigger an immediate send demand. */
947 outw(CSR0
, DEPCA_ADDR
);
948 outw(INEA
| TDMD
, DEPCA_DATA
);
950 dev
->trans_start
= jiffies
;
954 netif_start_queue(dev
);
963 ** The DEPCA interrupt handler.
965 static irqreturn_t
depca_interrupt(int irq
, void *dev_id
)
967 struct net_device
*dev
= dev_id
;
968 struct depca_private
*lp
;
973 printk("depca_interrupt(): irq %d for unknown device.\n", irq
);
977 lp
= (struct depca_private
*) dev
->priv
;
978 ioaddr
= dev
->base_addr
;
980 spin_lock(&lp
->lock
);
982 /* mask the DEPCA board interrupts and turn on the LED */
983 nicsr
= inb(DEPCA_NICSR
);
985 outb(nicsr
, DEPCA_NICSR
);
987 outw(CSR0
, DEPCA_ADDR
);
988 csr0
= inw(DEPCA_DATA
);
990 /* Acknowledge all of the current interrupt sources ASAP. */
991 outw(csr0
& INTE
, DEPCA_DATA
);
993 if (csr0
& RINT
) /* Rx interrupt (packet arrived) */
996 if (csr0
& TINT
) /* Tx interrupt (packet sent) */
999 /* Any resources available? */
1000 if ((TX_BUFFS_AVAIL
>= 0) && netif_queue_stopped(dev
)) {
1001 netif_wake_queue(dev
);
1004 /* Unmask the DEPCA board interrupts and turn off the LED */
1005 nicsr
= (nicsr
& ~IM
& ~LED
);
1006 outb(nicsr
, DEPCA_NICSR
);
1008 spin_unlock(&lp
->lock
);
1012 /* Called with lp->lock held */
1013 static int depca_rx(struct net_device
*dev
)
1015 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1019 for (entry
= lp
->rx_new
; !(readl(&lp
->rx_ring
[entry
].base
) & R_OWN
); entry
= lp
->rx_new
) {
1020 status
= readl(&lp
->rx_ring
[entry
].base
) >> 16;
1021 if (status
& R_STP
) { /* Remember start of frame */
1024 if (status
& R_ENP
) { /* Valid frame status */
1025 if (status
& R_ERR
) { /* There was an error. */
1026 dev
->stats
.rx_errors
++; /* Update the error stats. */
1027 if (status
& R_FRAM
)
1028 dev
->stats
.rx_frame_errors
++;
1029 if (status
& R_OFLO
)
1030 dev
->stats
.rx_over_errors
++;
1032 dev
->stats
.rx_crc_errors
++;
1033 if (status
& R_BUFF
)
1034 dev
->stats
.rx_fifo_errors
++;
1036 short len
, pkt_len
= readw(&lp
->rx_ring
[entry
].msg_length
) - 4;
1037 struct sk_buff
*skb
;
1039 skb
= dev_alloc_skb(pkt_len
+ 2);
1042 skb_reserve(skb
, 2); /* 16 byte align the IP header */
1043 buf
= skb_put(skb
, pkt_len
);
1044 if (entry
< lp
->rx_old
) { /* Wrapped buffer */
1045 len
= (lp
->rxRingMask
- lp
->rx_old
+ 1) * RX_BUFF_SZ
;
1046 memcpy_fromio(buf
, lp
->rx_buff
[lp
->rx_old
], len
);
1047 memcpy_fromio(buf
+ len
, lp
->rx_buff
[0], pkt_len
- len
);
1048 } else { /* Linear buffer */
1049 memcpy_fromio(buf
, lp
->rx_buff
[lp
->rx_old
], pkt_len
);
1053 ** Notify the upper protocol layers that there is another
1056 skb
->protocol
= eth_type_trans(skb
, dev
);
1062 dev
->last_rx
= jiffies
;
1063 dev
->stats
.rx_packets
++;
1064 dev
->stats
.rx_bytes
+= pkt_len
;
1065 for (i
= 1; i
< DEPCA_PKT_STAT_SZ
- 1; i
++) {
1066 if (pkt_len
< (i
* DEPCA_PKT_BIN_SZ
)) {
1067 lp
->pktStats
.bins
[i
]++;
1068 i
= DEPCA_PKT_STAT_SZ
;
1071 if (buf
[0] & 0x01) { /* Multicast/Broadcast */
1072 if ((*(s16
*) & buf
[0] == -1) && (*(s16
*) & buf
[2] == -1) && (*(s16
*) & buf
[4] == -1)) {
1073 lp
->pktStats
.broadcast
++;
1075 lp
->pktStats
.multicast
++;
1077 } 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])) {
1078 lp
->pktStats
.unicast
++;
1081 lp
->pktStats
.bins
[0]++; /* Duplicates stats.rx_packets */
1082 if (lp
->pktStats
.bins
[0] == 0) { /* Reset counters */
1083 memset((char *) &lp
->pktStats
, 0, sizeof(lp
->pktStats
));
1086 printk("%s: Memory squeeze, deferring packet.\n", dev
->name
);
1087 dev
->stats
.rx_dropped
++; /* Really, deferred. */
1091 /* Change buffer ownership for this last frame, back to the adapter */
1092 for (; lp
->rx_old
!= entry
; lp
->rx_old
= (++lp
->rx_old
) & lp
->rxRingMask
) {
1093 writel(readl(&lp
->rx_ring
[lp
->rx_old
].base
) | R_OWN
, &lp
->rx_ring
[lp
->rx_old
].base
);
1095 writel(readl(&lp
->rx_ring
[entry
].base
) | R_OWN
, &lp
->rx_ring
[entry
].base
);
1099 ** Update entry information
1101 lp
->rx_new
= (++lp
->rx_new
) & lp
->rxRingMask
;
1108 ** Buffer sent - check for buffer errors.
1109 ** Called with lp->lock held
1111 static int depca_tx(struct net_device
*dev
)
1113 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1116 u_long ioaddr
= dev
->base_addr
;
1118 for (entry
= lp
->tx_old
; entry
!= lp
->tx_new
; entry
= lp
->tx_old
) {
1119 status
= readl(&lp
->tx_ring
[entry
].base
) >> 16;
1121 if (status
< 0) { /* Packet not yet sent! */
1123 } else if (status
& T_ERR
) { /* An error occurred. */
1124 status
= readl(&lp
->tx_ring
[entry
].misc
);
1125 dev
->stats
.tx_errors
++;
1126 if (status
& TMD3_RTRY
)
1127 dev
->stats
.tx_aborted_errors
++;
1128 if (status
& TMD3_LCAR
)
1129 dev
->stats
.tx_carrier_errors
++;
1130 if (status
& TMD3_LCOL
)
1131 dev
->stats
.tx_window_errors
++;
1132 if (status
& TMD3_UFLO
)
1133 dev
->stats
.tx_fifo_errors
++;
1134 if (status
& (TMD3_BUFF
| TMD3_UFLO
)) {
1135 /* Trigger an immediate send demand. */
1136 outw(CSR0
, DEPCA_ADDR
);
1137 outw(INEA
| TDMD
, DEPCA_DATA
);
1139 } else if (status
& (T_MORE
| T_ONE
)) {
1140 dev
->stats
.collisions
++;
1142 dev
->stats
.tx_packets
++;
1145 /* Update all the pointers */
1146 lp
->tx_old
= (++lp
->tx_old
) & lp
->txRingMask
;
1152 static int depca_close(struct net_device
*dev
)
1154 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1156 u_long ioaddr
= dev
->base_addr
;
1158 netif_stop_queue(dev
);
1160 outw(CSR0
, DEPCA_ADDR
);
1162 if (depca_debug
> 1) {
1163 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev
->name
, inw(DEPCA_DATA
));
1167 ** We stop the DEPCA here -- it occasionally polls
1168 ** memory if we don't.
1170 outw(STOP
, DEPCA_DATA
);
1173 ** Give back the ROM in case the user wants to go to DOS
1175 if (lp
->adapter
!= DEPCA
) {
1176 nicsr
= inb(DEPCA_NICSR
);
1178 outb(nicsr
, DEPCA_NICSR
);
1182 ** Free the associated irq
1184 free_irq(dev
->irq
, dev
);
1188 static void LoadCSRs(struct net_device
*dev
)
1190 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1191 u_long ioaddr
= dev
->base_addr
;
1193 outw(CSR1
, DEPCA_ADDR
); /* initialisation block address LSW */
1194 outw((u16
) lp
->device_ram_start
, DEPCA_DATA
);
1195 outw(CSR2
, DEPCA_ADDR
); /* initialisation block address MSW */
1196 outw((u16
) (lp
->device_ram_start
>> 16), DEPCA_DATA
);
1197 outw(CSR3
, DEPCA_ADDR
); /* ALE control */
1198 outw(ACON
, DEPCA_DATA
);
1200 outw(CSR0
, DEPCA_ADDR
); /* Point back to CSR0 */
1205 static int InitRestartDepca(struct net_device
*dev
)
1207 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1208 u_long ioaddr
= dev
->base_addr
;
1211 /* Copy the shadow init_block to shared memory */
1212 memcpy_toio(lp
->sh_mem
, &lp
->init_block
, sizeof(struct depca_init
));
1214 outw(CSR0
, DEPCA_ADDR
); /* point back to CSR0 */
1215 outw(INIT
, DEPCA_DATA
); /* initialize DEPCA */
1217 /* wait for lance to complete initialisation */
1218 for (i
= 0; (i
< 100) && !(inw(DEPCA_DATA
) & IDON
); i
++);
1221 /* clear IDON by writing a "1", enable interrupts and start lance */
1222 outw(IDON
| INEA
| STRT
, DEPCA_DATA
);
1223 if (depca_debug
> 2) {
1224 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 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev
->name
, i
, lp
->mem_start
, inw(DEPCA_DATA
));
1235 ** Set or clear the multicast filter for this adaptor.
1237 static void set_multicast_list(struct net_device
*dev
)
1239 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1240 u_long ioaddr
= dev
->base_addr
;
1242 netif_stop_queue(dev
);
1243 while (lp
->tx_old
!= lp
->tx_new
); /* Wait for the ring to empty */
1245 STOP_DEPCA
; /* Temporarily stop the depca. */
1246 depca_init_ring(dev
); /* Initialize the descriptor rings */
1248 if (dev
->flags
& IFF_PROMISC
) { /* Set promiscuous mode */
1249 lp
->init_block
.mode
|= PROM
;
1251 SetMulticastFilter(dev
);
1252 lp
->init_block
.mode
&= ~PROM
; /* Unset promiscuous mode */
1255 LoadCSRs(dev
); /* Reload CSR3 */
1256 InitRestartDepca(dev
); /* Resume normal operation. */
1257 netif_start_queue(dev
); /* Unlock the TX ring */
1261 ** Calculate the hash code and update the logical address filter
1262 ** from a list of ethernet multicast addresses.
1263 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1264 ** LANCE calculates its hash codes big endian.
1266 static void SetMulticastFilter(struct net_device
*dev
)
1268 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1269 struct dev_mc_list
*dmi
= dev
->mc_list
;
1271 int i
, j
, bit
, byte
;
1275 if (dev
->flags
& IFF_ALLMULTI
) { /* Set all multicast bits */
1276 for (i
= 0; i
< (HASH_TABLE_LEN
>> 3); i
++) {
1277 lp
->init_block
.mcast_table
[i
] = (char) 0xff;
1280 for (i
= 0; i
< (HASH_TABLE_LEN
>> 3); i
++) { /* Clear the multicast table */
1281 lp
->init_block
.mcast_table
[i
] = 0;
1283 /* Add multicast addresses */
1284 for (i
= 0; i
< dev
->mc_count
; i
++) { /* for each address in the list */
1285 addrs
= dmi
->dmi_addr
;
1287 if ((*addrs
& 0x01) == 1) { /* multicast address? */
1288 crc
= ether_crc(ETH_ALEN
, addrs
);
1289 hashcode
= (crc
& 1); /* hashcode is 6 LSb of CRC ... */
1290 for (j
= 0; j
< 5; j
++) { /* ... in reverse order. */
1291 hashcode
= (hashcode
<< 1) | ((crc
>>= 1) & 1);
1295 byte
= hashcode
>> 3; /* bit[3-5] -> byte in filter */
1296 bit
= 1 << (hashcode
& 0x07); /* bit[0-2] -> bit in byte */
1297 lp
->init_block
.mcast_table
[byte
] |= bit
;
1305 static int __init
depca_common_init (u_long ioaddr
, struct net_device
**devp
)
1309 if (!request_region (ioaddr
, DEPCA_TOTAL_SIZE
, depca_string
)) {
1314 if (DevicePresent(ioaddr
)) {
1319 if (!(*devp
= alloc_etherdev (sizeof (struct depca_private
)))) {
1327 release_region (ioaddr
, DEPCA_TOTAL_SIZE
);
1334 ** Microchannel bus I/O device probe
1336 static int __init
depca_mca_probe(struct device
*device
)
1338 unsigned char pos
[2];
1339 unsigned char where
;
1340 unsigned long iobase
, mem_start
;
1342 struct mca_device
*mdev
= to_mca_device (device
);
1343 struct net_device
*dev
;
1344 struct depca_private
*lp
;
1347 ** Search for the adapter. If an address has been given, search
1348 ** specifically for the card at that address. Otherwise find the
1349 ** first card in the system.
1352 pos
[0] = mca_device_read_stored_pos(mdev
, 2);
1353 pos
[1] = mca_device_read_stored_pos(mdev
, 3);
1356 ** IO of card is handled by bits 1 and 2 of pos0.
1364 where
= (pos
[0] & 6) >> 1;
1365 iobase
= 0x2c00 + (0x10 * where
);
1368 ** Found the adapter we were looking for. Now start setting it up.
1370 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1371 ** of pos1. Bits are as follows (from the ADF file):
1375 ** --------------------
1381 where
= pos
[1] & 0x0f;
1396 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev
->name
, where
);
1401 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1402 ** They are mapped as follows:
1405 ** 5 4 3 Memory Addresses
1406 ** 0 0 0 C0000-CFFFF (64K)
1407 ** 1 0 0 C8000-CFFFF (32K)
1408 ** 0 0 1 D0000-DFFFF (64K)
1409 ** 1 0 1 D8000-DFFFF (32K)
1410 ** 0 1 0 E0000-EFFFF (64K)
1411 ** 1 1 0 E8000-EFFFF (32K)
1413 where
= (pos
[0] & 0x18) >> 3;
1414 mem_start
= 0xc0000 + (where
* 0x10000);
1415 if (pos
[0] & 0x20) {
1416 mem_start
+= 0x8000;
1419 /* claim the slot */
1420 strncpy(mdev
->name
, depca_mca_adapter_name
[mdev
->index
],
1421 sizeof(mdev
->name
));
1422 mca_device_set_claim(mdev
, 1);
1425 ** Get everything allocated and initialized... (almost just
1426 ** like the ISA and EISA probes)
1428 irq
= mca_device_transform_irq(mdev
, irq
);
1429 iobase
= mca_device_transform_ioport(mdev
, iobase
);
1431 if ((err
= depca_common_init (iobase
, &dev
)))
1435 dev
->base_addr
= iobase
;
1437 lp
->depca_bus
= DEPCA_BUS_MCA
;
1438 lp
->adapter
= depca_mca_adapter_type
[mdev
->index
];
1439 lp
->mem_start
= mem_start
;
1441 if ((err
= depca_hw_init(dev
, device
)))
1448 release_region (iobase
, DEPCA_TOTAL_SIZE
);
1450 mca_device_set_claim(mdev
, 0);
1457 ** ISA bus I/O device probe
1460 static void __init
depca_platform_probe (void)
1463 struct platform_device
*pldev
;
1465 for (i
= 0; depca_io_ports
[i
].iobase
; i
++) {
1466 depca_io_ports
[i
].device
= NULL
;
1468 /* if an address has been specified on the command
1469 * line, use it (if valid) */
1470 if (io
&& io
!= depca_io_ports
[i
].iobase
)
1473 pldev
= platform_device_alloc(depca_string
, i
);
1477 pldev
->dev
.platform_data
= (void *) depca_io_ports
[i
].iobase
;
1478 depca_io_ports
[i
].device
= pldev
;
1480 if (platform_device_add(pldev
)) {
1481 depca_io_ports
[i
].device
= NULL
;
1482 pldev
->dev
.platform_data
= NULL
;
1483 platform_device_put(pldev
);
1487 if (!pldev
->dev
.driver
) {
1488 /* The driver was not bound to this device, there was
1489 * no hardware at this address. Unregister it, as the
1490 * release fuction will take care of freeing the
1491 * allocated structure */
1493 depca_io_ports
[i
].device
= NULL
;
1494 pldev
->dev
.platform_data
= NULL
;
1495 platform_device_unregister (pldev
);
1500 static enum depca_type __init
depca_shmem_probe (ulong
*mem_start
)
1502 u_long mem_base
[] = DEPCA_RAM_BASE_ADDRESSES
;
1503 enum depca_type adapter
= unknown
;
1506 for (i
= 0; mem_base
[i
]; i
++) {
1507 *mem_start
= mem
? mem
: mem_base
[i
];
1508 adapter
= DepcaSignature (adapter_name
, *mem_start
);
1509 if (adapter
!= unknown
)
1516 static int __init
depca_isa_probe (struct platform_device
*device
)
1518 struct net_device
*dev
;
1519 struct depca_private
*lp
;
1520 u_long ioaddr
, mem_start
= 0;
1521 enum depca_type adapter
= unknown
;
1524 ioaddr
= (u_long
) device
->dev
.platform_data
;
1526 if ((status
= depca_common_init (ioaddr
, &dev
)))
1529 adapter
= depca_shmem_probe (&mem_start
);
1531 if (adapter
== unknown
) {
1536 dev
->base_addr
= ioaddr
;
1537 dev
->irq
= irq
; /* Use whatever value the user gave
1538 * us, and 0 if he didn't. */
1540 lp
->depca_bus
= DEPCA_BUS_ISA
;
1541 lp
->adapter
= adapter
;
1542 lp
->mem_start
= mem_start
;
1544 if ((status
= depca_hw_init(dev
, &device
->dev
)))
1551 release_region (ioaddr
, DEPCA_TOTAL_SIZE
);
1557 ** EISA callbacks from sysfs.
1561 static int __init
depca_eisa_probe (struct device
*device
)
1563 struct eisa_device
*edev
;
1564 struct net_device
*dev
;
1565 struct depca_private
*lp
;
1566 u_long ioaddr
, mem_start
;
1569 edev
= to_eisa_device (device
);
1570 ioaddr
= edev
->base_addr
+ DEPCA_EISA_IO_PORTS
;
1572 if ((status
= depca_common_init (ioaddr
, &dev
)))
1575 /* It would have been nice to get card configuration from the
1576 * card. Unfortunately, this register is write-only (shares
1577 * it's address with the ethernet prom)... As we don't parse
1578 * the EISA configuration structures (yet... :-), just rely on
1579 * the ISA probing to sort it out... */
1581 depca_shmem_probe (&mem_start
);
1583 dev
->base_addr
= ioaddr
;
1586 lp
->depca_bus
= DEPCA_BUS_EISA
;
1587 lp
->adapter
= edev
->id
.driver_data
;
1588 lp
->mem_start
= mem_start
;
1590 if ((status
= depca_hw_init(dev
, device
)))
1597 release_region (ioaddr
, DEPCA_TOTAL_SIZE
);
1603 static int __devexit
depca_device_remove (struct device
*device
)
1605 struct net_device
*dev
;
1606 struct depca_private
*lp
;
1609 dev
= device
->driver_data
;
1612 unregister_netdev (dev
);
1613 iounmap (lp
->sh_mem
);
1614 release_mem_region (lp
->mem_start
, lp
->mem_len
);
1615 release_region (dev
->base_addr
, DEPCA_TOTAL_SIZE
);
1616 bus
= lp
->depca_bus
;
1623 ** Look for a particular board name in the on-board Remote Diagnostics
1624 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1627 static int __init
DepcaSignature(char *name
, u_long base_addr
)
1632 u_long prom_addr
= base_addr
+ 0xc000;
1633 u_long mem_addr
= base_addr
+ 0x8000; /* 32KB */
1635 /* Can't reserve the prom region, it is already marked as
1636 * used, at least on x86. Instead, reserve a memory region a
1637 * board would certainly use. If it works, go ahead. If not,
1638 * run like hell... */
1640 if (!request_mem_region (mem_addr
, 16, depca_string
))
1643 /* Copy the first 16 bytes of ROM */
1645 ptr
= ioremap(prom_addr
, 16);
1647 printk(KERN_ERR
"depca: I/O remap failed at %lx\n", prom_addr
);
1650 for (i
= 0; i
< 16; i
++) {
1651 tmpstr
[i
] = readb(ptr
+ i
);
1655 release_mem_region (mem_addr
, 16);
1657 /* Check if PROM contains a valid string */
1658 for (i
= 0; *depca_signature
[i
] != '\0'; i
++) {
1659 for (j
= 0, k
= 0; j
< 16 && k
< strlen(depca_signature
[i
]); j
++) {
1660 if (depca_signature
[i
][k
] == tmpstr
[j
]) { /* track signature */
1662 } else { /* lost signature; begin search again */
1666 if (k
== strlen(depca_signature
[i
]))
1670 /* Check if name string is valid, provided there's no PROM */
1671 if (name
&& *name
&& (i
== unknown
)) {
1672 for (i
= 0; *depca_signature
[i
] != '\0'; i
++) {
1673 if (strcmp(name
, depca_signature
[i
]) == 0)
1682 ** Look for a special sequence in the Ethernet station address PROM that
1683 ** is common across all DEPCA products. Note that the original DEPCA needs
1684 ** its ROM address counter to be initialized and enabled. Only enable
1685 ** if the first address octet is a 0x08 - this minimises the chances of
1686 ** messing around with some other hardware, but it assumes that this DEPCA
1687 ** card initialized itself correctly.
1689 ** Search the Ethernet address ROM for the signature. Since the ROM address
1690 ** counter can start at an arbitrary point, the search must include the entire
1691 ** probe sequence length plus the (length_of_the_signature - 1).
1692 ** Stop the search IMMEDIATELY after the signature is found so that the
1693 ** PROM address counter is correctly positioned at the start of the
1694 ** ethernet address for later read out.
1696 static int __init
DevicePresent(u_long ioaddr
)
1703 char Sig
[sizeof(u32
) << 1];
1706 short sigLength
= 0;
1709 int i
, j
, status
= 0;
1711 data
= inb(DEPCA_PROM
); /* clear counter on DEPCA */
1712 data
= inb(DEPCA_PROM
); /* read data */
1714 if (data
== 0x08) { /* Enable counter on DEPCA */
1715 nicsr
= inb(DEPCA_NICSR
);
1717 outb(nicsr
, DEPCA_NICSR
);
1720 dev
.llsig
.a
= ETH_PROM_SIG
;
1721 dev
.llsig
.b
= ETH_PROM_SIG
;
1722 sigLength
= sizeof(u32
) << 1;
1724 for (i
= 0, j
= 0; j
< sigLength
&& i
< PROBE_LENGTH
+ sigLength
- 1; i
++) {
1725 data
= inb(DEPCA_PROM
);
1726 if (dev
.Sig
[j
] == data
) { /* track signature */
1728 } else { /* lost signature; begin search again */
1729 if (data
== dev
.Sig
[0]) { /* rare case.... */
1737 if (j
!= sigLength
) {
1738 status
= -ENODEV
; /* search failed */
1745 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1746 ** reason: access the upper half of the PROM with x=0; access the lower half
1749 static int __init
get_hw_addr(struct net_device
*dev
)
1751 u_long ioaddr
= dev
->base_addr
;
1752 struct depca_private
*lp
= dev
->priv
;
1753 int i
, k
, tmp
, status
= 0;
1754 u_short j
, x
, chksum
;
1756 x
= (((lp
->adapter
== de100
) || (lp
->adapter
== de101
)) ? 1 : 0);
1758 for (i
= 0, k
= 0, j
= 0; j
< 3; j
++) {
1763 k
+= (u_char
) (tmp
= inb(DEPCA_PROM
+ x
));
1764 dev
->dev_addr
[i
++] = (u_char
) tmp
;
1765 k
+= (u_short
) ((tmp
= inb(DEPCA_PROM
+ x
)) << 8);
1766 dev
->dev_addr
[i
++] = (u_char
) tmp
;
1774 chksum
= (u_char
) inb(DEPCA_PROM
+ x
);
1775 chksum
|= (u_short
) (inb(DEPCA_PROM
+ x
) << 8);
1783 ** Load a packet into the shared memory
1785 static int load_packet(struct net_device
*dev
, struct sk_buff
*skb
)
1787 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1788 int i
, entry
, end
, len
, status
= 0;
1790 entry
= lp
->tx_new
; /* Ring around buffer number. */
1791 end
= (entry
+ (skb
->len
- 1) / TX_BUFF_SZ
) & lp
->txRingMask
;
1792 if (!(readl(&lp
->tx_ring
[end
].base
) & T_OWN
)) { /* Enough room? */
1794 ** Caution: the write order is important here... don't set up the
1795 ** ownership rights until all the other information is in place.
1797 if (end
< entry
) { /* wrapped buffer */
1798 len
= (lp
->txRingMask
- entry
+ 1) * TX_BUFF_SZ
;
1799 memcpy_toio(lp
->tx_buff
[entry
], skb
->data
, len
);
1800 memcpy_toio(lp
->tx_buff
[0], skb
->data
+ len
, skb
->len
- len
);
1801 } else { /* linear buffer */
1802 memcpy_toio(lp
->tx_buff
[entry
], skb
->data
, skb
->len
);
1805 /* set up the buffer descriptors */
1806 len
= (skb
->len
< ETH_ZLEN
) ? ETH_ZLEN
: skb
->len
;
1807 for (i
= entry
; i
!= end
; i
= (i
+1) & lp
->txRingMask
) {
1808 /* clean out flags */
1809 writel(readl(&lp
->tx_ring
[i
].base
) & ~T_FLAGS
, &lp
->tx_ring
[i
].base
);
1810 writew(0x0000, &lp
->tx_ring
[i
].misc
); /* clears other error flags */
1811 writew(-TX_BUFF_SZ
, &lp
->tx_ring
[i
].length
); /* packet length in buffer */
1814 /* clean out flags */
1815 writel(readl(&lp
->tx_ring
[end
].base
) & ~T_FLAGS
, &lp
->tx_ring
[end
].base
);
1816 writew(0x0000, &lp
->tx_ring
[end
].misc
); /* clears other error flags */
1817 writew(-len
, &lp
->tx_ring
[end
].length
); /* packet length in last buff */
1819 /* start of packet */
1820 writel(readl(&lp
->tx_ring
[entry
].base
) | T_STP
, &lp
->tx_ring
[entry
].base
);
1822 writel(readl(&lp
->tx_ring
[end
].base
) | T_ENP
, &lp
->tx_ring
[end
].base
);
1824 for (i
= end
; i
!= entry
; --i
) {
1825 /* ownership of packet */
1826 writel(readl(&lp
->tx_ring
[i
].base
) | T_OWN
, &lp
->tx_ring
[i
].base
);
1828 i
= lp
->txRingMask
+ 1;
1830 writel(readl(&lp
->tx_ring
[entry
].base
) | T_OWN
, &lp
->tx_ring
[entry
].base
);
1832 lp
->tx_new
= (++end
) & lp
->txRingMask
; /* update current pointers */
1840 static void depca_dbg_open(struct net_device
*dev
)
1842 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1843 u_long ioaddr
= dev
->base_addr
;
1844 struct depca_init
*p
= &lp
->init_block
;
1847 if (depca_debug
> 1) {
1848 /* Do not copy the shadow init block into shared memory */
1849 /* Debugging should not affect normal operation! */
1850 /* The shadow init block will get copied across during InitRestartDepca */
1851 printk("%s: depca open with irq %d\n", dev
->name
, dev
->irq
);
1852 printk("Descriptor head addresses (CPU):\n");
1853 printk(" 0x%lx 0x%lx\n", (u_long
) lp
->rx_ring
, (u_long
) lp
->tx_ring
);
1854 printk("Descriptor addresses (CPU):\nRX: ");
1855 for (i
= 0; i
< lp
->rxRingMask
; i
++) {
1857 printk("%p ", &lp
->rx_ring
[i
].base
);
1860 printk("...%p\n", &lp
->rx_ring
[i
].base
);
1862 for (i
= 0; i
< lp
->txRingMask
; i
++) {
1864 printk("%p ", &lp
->tx_ring
[i
].base
);
1867 printk("...%p\n", &lp
->tx_ring
[i
].base
);
1868 printk("\nDescriptor buffers (Device):\nRX: ");
1869 for (i
= 0; i
< lp
->rxRingMask
; i
++) {
1871 printk("0x%8.8x ", readl(&lp
->rx_ring
[i
].base
));
1874 printk("...0x%8.8x\n", readl(&lp
->rx_ring
[i
].base
));
1876 for (i
= 0; i
< lp
->txRingMask
; i
++) {
1878 printk("0x%8.8x ", readl(&lp
->tx_ring
[i
].base
));
1881 printk("...0x%8.8x\n", readl(&lp
->tx_ring
[i
].base
));
1882 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp
->mem_start
);
1883 printk(" mode: 0x%4.4x\n", p
->mode
);
1884 printk(" physical address: ");
1885 for (i
= 0; i
< ETH_ALEN
- 1; i
++) {
1886 printk("%2.2x:", p
->phys_addr
[i
]);
1888 printk("%2.2x\n", p
->phys_addr
[i
]);
1889 printk(" multicast hash table: ");
1890 for (i
= 0; i
< (HASH_TABLE_LEN
>> 3) - 1; i
++) {
1891 printk("%2.2x:", p
->mcast_table
[i
]);
1893 printk("%2.2x\n", p
->mcast_table
[i
]);
1894 printk(" rx_ring at: 0x%8.8x\n", p
->rx_ring
);
1895 printk(" tx_ring at: 0x%8.8x\n", p
->tx_ring
);
1896 printk("buffers (Phys): 0x%8.8lx\n", lp
->mem_start
+ lp
->buffs_offset
);
1897 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp
->rxRingMask
+ 1, lp
->rx_rlen
);
1898 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp
->txRingMask
+ 1, lp
->tx_rlen
);
1899 outw(CSR2
, DEPCA_ADDR
);
1900 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA
));
1901 outw(CSR1
, DEPCA_ADDR
);
1902 printk("%4.4x\n", inw(DEPCA_DATA
));
1903 outw(CSR3
, DEPCA_ADDR
);
1904 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA
));
1911 ** Perform IOCTL call functions here. Some are privileged operations and the
1912 ** effective uid is checked in those cases.
1913 ** All multicast IOCTLs will not work here and are for testing purposes only.
1915 static int depca_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1917 struct depca_private
*lp
= (struct depca_private
*) dev
->priv
;
1918 struct depca_ioctl
*ioc
= (struct depca_ioctl
*) &rq
->ifr_ifru
;
1920 u_long ioaddr
= dev
->base_addr
;
1922 u8 addr
[(HASH_TABLE_LEN
* ETH_ALEN
)];
1923 u16 sval
[(HASH_TABLE_LEN
* ETH_ALEN
) >> 1];
1924 u32 lval
[(HASH_TABLE_LEN
* ETH_ALEN
) >> 2];
1926 unsigned long flags
;
1930 case DEPCA_GET_HWADDR
: /* Get the hardware address */
1931 for (i
= 0; i
< ETH_ALEN
; i
++) {
1932 tmp
.addr
[i
] = dev
->dev_addr
[i
];
1934 ioc
->len
= ETH_ALEN
;
1935 if (copy_to_user(ioc
->data
, tmp
.addr
, ioc
->len
))
1939 case DEPCA_SET_HWADDR
: /* Set the hardware address */
1940 if (!capable(CAP_NET_ADMIN
))
1942 if (copy_from_user(tmp
.addr
, ioc
->data
, ETH_ALEN
))
1944 for (i
= 0; i
< ETH_ALEN
; i
++) {
1945 dev
->dev_addr
[i
] = tmp
.addr
[i
];
1947 netif_stop_queue(dev
);
1948 while (lp
->tx_old
!= lp
->tx_new
)
1949 cpu_relax(); /* Wait for the ring to empty */
1951 STOP_DEPCA
; /* Temporarily stop the depca. */
1952 depca_init_ring(dev
); /* Initialize the descriptor rings */
1953 LoadCSRs(dev
); /* Reload CSR3 */
1954 InitRestartDepca(dev
); /* Resume normal operation. */
1955 netif_start_queue(dev
); /* Unlock the TX ring */
1958 case DEPCA_SET_PROM
: /* Set Promiscuous Mode */
1959 if (!capable(CAP_NET_ADMIN
))
1961 netif_stop_queue(dev
);
1962 while (lp
->tx_old
!= lp
->tx_new
)
1963 cpu_relax(); /* Wait for the ring to empty */
1965 STOP_DEPCA
; /* Temporarily stop the depca. */
1966 depca_init_ring(dev
); /* Initialize the descriptor rings */
1967 lp
->init_block
.mode
|= PROM
; /* Set promiscuous mode */
1969 LoadCSRs(dev
); /* Reload CSR3 */
1970 InitRestartDepca(dev
); /* Resume normal operation. */
1971 netif_start_queue(dev
); /* Unlock the TX ring */
1974 case DEPCA_CLR_PROM
: /* Clear Promiscuous Mode */
1975 if (!capable(CAP_NET_ADMIN
))
1977 netif_stop_queue(dev
);
1978 while (lp
->tx_old
!= lp
->tx_new
)
1979 cpu_relax(); /* Wait for the ring to empty */
1981 STOP_DEPCA
; /* Temporarily stop the depca. */
1982 depca_init_ring(dev
); /* Initialize the descriptor rings */
1983 lp
->init_block
.mode
&= ~PROM
; /* Clear promiscuous mode */
1985 LoadCSRs(dev
); /* Reload CSR3 */
1986 InitRestartDepca(dev
); /* Resume normal operation. */
1987 netif_start_queue(dev
); /* Unlock the TX ring */
1990 case DEPCA_SAY_BOO
: /* Say "Boo!" to the kernel log file */
1991 if(!capable(CAP_NET_ADMIN
))
1993 printk("%s: Boo!\n", dev
->name
);
1996 case DEPCA_GET_MCA
: /* Get the multicast address table */
1997 ioc
->len
= (HASH_TABLE_LEN
>> 3);
1998 if (copy_to_user(ioc
->data
, lp
->init_block
.mcast_table
, ioc
->len
))
2002 case DEPCA_SET_MCA
: /* Set a multicast address */
2003 if (!capable(CAP_NET_ADMIN
))
2005 if (ioc
->len
>= HASH_TABLE_LEN
)
2007 if (copy_from_user(tmp
.addr
, ioc
->data
, ETH_ALEN
* ioc
->len
))
2009 set_multicast_list(dev
);
2012 case DEPCA_CLR_MCA
: /* Clear all multicast addresses */
2013 if (!capable(CAP_NET_ADMIN
))
2015 set_multicast_list(dev
);
2018 case DEPCA_MCA_EN
: /* Enable pass all multicast addressing */
2019 if (!capable(CAP_NET_ADMIN
))
2021 set_multicast_list(dev
);
2024 case DEPCA_GET_STATS
: /* Get the driver statistics */
2025 ioc
->len
= sizeof(lp
->pktStats
);
2026 buf
= kmalloc(ioc
->len
, GFP_KERNEL
);
2029 spin_lock_irqsave(&lp
->lock
, flags
);
2030 memcpy(buf
, &lp
->pktStats
, ioc
->len
);
2031 spin_unlock_irqrestore(&lp
->lock
, flags
);
2032 if (copy_to_user(ioc
->data
, buf
, ioc
->len
))
2037 case DEPCA_CLR_STATS
: /* Zero out the driver statistics */
2038 if (!capable(CAP_NET_ADMIN
))
2040 spin_lock_irqsave(&lp
->lock
, flags
);
2041 memset(&lp
->pktStats
, 0, sizeof(lp
->pktStats
));
2042 spin_unlock_irqrestore(&lp
->lock
, flags
);
2045 case DEPCA_GET_REG
: /* Get the DEPCA Registers */
2047 tmp
.sval
[i
++] = inw(DEPCA_NICSR
);
2048 outw(CSR0
, DEPCA_ADDR
); /* status register */
2049 tmp
.sval
[i
++] = inw(DEPCA_DATA
);
2050 memcpy(&tmp
.sval
[i
], &lp
->init_block
, sizeof(struct depca_init
));
2051 ioc
->len
= i
+ sizeof(struct depca_init
);
2052 if (copy_to_user(ioc
->data
, tmp
.addr
, ioc
->len
))
2063 static int __init
depca_module_init (void)
2068 err
= mca_register_driver (&depca_mca_driver
);
2071 err
|= eisa_driver_register (&depca_eisa_driver
);
2073 err
|= platform_driver_register (&depca_isa_driver
);
2074 depca_platform_probe ();
2079 static void __exit
depca_module_exit (void)
2083 mca_unregister_driver (&depca_mca_driver
);
2086 eisa_driver_unregister (&depca_eisa_driver
);
2088 platform_driver_unregister (&depca_isa_driver
);
2090 for (i
= 0; depca_io_ports
[i
].iobase
; i
++) {
2091 if (depca_io_ports
[i
].device
) {
2092 depca_io_ports
[i
].device
->dev
.platform_data
= NULL
;
2093 platform_device_unregister (depca_io_ports
[i
].device
);
2094 depca_io_ports
[i
].device
= NULL
;
2099 module_init (depca_module_init
);
2100 module_exit (depca_module_exit
);