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/sched.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>
257 #include <linux/platform_device.h>
258 #include <linux/bitops.h>
260 #include <asm/uaccess.h>
265 #include <linux/mca.h>
269 #include <linux/eisa.h>
274 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
277 static int depca_debug = DEPCA_DEBUG;
279 static int depca_debug = 1;
282 #define DEPCA_NDA 0xffe0 /* No Device Address */
284 #define TX_TIMEOUT (1*HZ)
287 ** Ethernet PROM defines
289 #define PROBE_LENGTH 32
290 #define ETH_PROM_SIG 0xAA5500FFUL
293 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
294 ** here is <= to the amount of shared memory set up by the board switches.
295 ** The number of descriptors MUST BE A POWER OF 2.
297 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
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 */
307 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
312 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
313 #define DEPCA_TOTAL_SIZE 0x10
317 struct platform_device *device;
318 } depca_io_ports[] = {
325 ** Name <-> Adapter mapping
327 #define DEPCA_SIGNATURE {"DEPCA",\
329 "DE200","DE201","DE202",\
334 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
337 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
340 static char depca_string[] = "depca";
342 static int depca_device_remove (struct device *device);
345 static struct eisa_device_id depca_eisa_ids[] = {
346 { "DEC4220", de422 },
349 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
351 static int depca_eisa_probe (struct device *device);
353 static struct eisa_driver depca_eisa_driver = {
354 .id_table = depca_eisa_ids,
356 .name = depca_string,
357 .probe = depca_eisa_probe,
358 .remove = __devexit_p (depca_device_remove)
365 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
367 #define DE210_ID 0x628d
368 #define DE212_ID 0x6def
370 static short depca_mca_adapter_ids[] = {
376 static char *depca_mca_adapter_name[] = {
377 "DEC EtherWORKS MC Adapter (DE210)",
378 "DEC EtherWORKS MC Adapter (DE212)",
382 static enum depca_type depca_mca_adapter_type[] = {
388 static int depca_mca_probe (struct device *);
390 static struct mca_driver depca_mca_driver = {
391 .id_table = depca_mca_adapter_ids,
393 .name = depca_string,
394 .bus = &mca_bus_type,
395 .probe = depca_mca_probe,
396 .remove = __devexit_p(depca_device_remove),
401 static int depca_isa_probe (struct platform_device *);
403 static int __devexit depca_isa_remove(struct platform_device *pdev)
405 return depca_device_remove(&pdev->dev);
408 static struct platform_driver depca_isa_driver = {
409 .probe = depca_isa_probe,
410 .remove = __devexit_p(depca_isa_remove),
412 .name = depca_string,
417 ** Miscellaneous info...
419 #define DEPCA_STRLEN 16
422 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
423 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
424 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
425 ** and hence the RX descriptor ring's first entry.
427 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
428 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
429 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
432 ** The DEPCA Rx and Tx ring descriptors.
434 struct depca_rx_desc {
436 s16 buf_length; /* This length is negative 2's complement! */
437 s16 msg_length; /* This length is "normal". */
440 struct depca_tx_desc {
442 s16 length; /* This length is negative 2's complement! */
443 s16 misc; /* Errors and TDR info */
446 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
447 to LANCE memory address space */
450 ** The Lance initialization block, described in databook, in common memory.
453 u16 mode; /* Mode register */
454 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
455 u8 mcast_table[8]; /* Multicast Hash Table. */
456 u32 rx_ring; /* Rx ring base pointer & ring length */
457 u32 tx_ring; /* Tx ring base pointer & ring length */
460 #define DEPCA_PKT_STAT_SZ 16
461 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
462 increase DEPCA_PKT_STAT_SZ */
463 struct depca_private {
464 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
465 enum depca_type adapter; /* Adapter type */
470 } depca_bus; /* type of bus */
471 struct depca_init init_block; /* Shadow Initialization block */
472 /* CPU address space fields */
473 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
474 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
475 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
477 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
478 u_long mem_start; /* Bus address of device RAM (before remap) */
479 u_long mem_len; /* device memory size */
480 /* Device address space fields */
481 u_long device_ram_start; /* Start of RAM in device addr space */
482 /* Offsets used in both address spaces */
483 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
484 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
485 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
486 /* Kernel-only (not device) fields */
487 int rx_new, tx_new; /* The next free ring entry */
488 int rx_old, tx_old; /* The ring entries to be free()ed. */
490 struct { /* Private stats counters */
491 u32 bins[DEPCA_PKT_STAT_SZ];
495 u32 excessive_collisions;
497 u32 excessive_underruns;
499 int txRingMask; /* TX ring mask */
500 int rxRingMask; /* RX ring mask */
501 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
502 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
506 ** The transmit ring full condition is described by the tx_old and tx_new
508 ** tx_old = tx_new Empty ring
509 ** tx_old = tx_new+1 Full ring
510 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
512 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
513 lp->tx_old+lp->txRingMask-lp->tx_new:\
514 lp->tx_old -lp->tx_new-1)
519 static int depca_open(struct net_device *dev);
520 static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
521 struct net_device *dev);
522 static irqreturn_t depca_interrupt(int irq, void *dev_id);
523 static int depca_close(struct net_device *dev);
524 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
525 static void depca_tx_timeout(struct net_device *dev);
526 static void set_multicast_list(struct net_device *dev);
531 static void depca_init_ring(struct net_device *dev);
532 static int depca_rx(struct net_device *dev);
533 static int depca_tx(struct net_device *dev);
535 static void LoadCSRs(struct net_device *dev);
536 static int InitRestartDepca(struct net_device *dev);
537 static int DepcaSignature(char *name, u_long paddr);
538 static int DevicePresent(u_long ioaddr);
539 static int get_hw_addr(struct net_device *dev);
540 static void SetMulticastFilter(struct net_device *dev);
541 static int load_packet(struct net_device *dev, struct sk_buff *skb);
542 static void depca_dbg_open(struct net_device *dev);
544 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
545 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
546 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
547 static u_char *depca_irq;
551 static char *adapter_name;
552 static int mem; /* For loadable module assignment
553 use insmod mem=0x????? .... */
554 module_param (irq, int, 0);
555 module_param (io, int, 0);
556 module_param (adapter_name, charp, 0);
557 module_param (mem, int, 0);
558 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
559 MODULE_PARM_DESC(io, "DEPCA I/O base address");
560 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
561 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
562 MODULE_LICENSE("GPL");
565 ** Miscellaneous defines...
568 outw(CSR0, DEPCA_ADDR);\
569 outw(STOP, DEPCA_DATA)
571 static const struct net_device_ops depca_netdev_ops = {
572 .ndo_open = depca_open,
573 .ndo_start_xmit = depca_start_xmit,
574 .ndo_stop = depca_close,
575 .ndo_set_multicast_list = set_multicast_list,
576 .ndo_do_ioctl = depca_ioctl,
577 .ndo_tx_timeout = depca_tx_timeout,
578 .ndo_change_mtu = eth_change_mtu,
579 .ndo_set_mac_address = eth_mac_addr,
580 .ndo_validate_addr = eth_validate_addr,
583 static int __init depca_hw_init (struct net_device *dev, struct device *device)
585 struct depca_private *lp;
586 int i, j, offset, netRAM, mem_len, status = 0;
592 * We are now supposed to enter this function with the
593 * following fields filled with proper values :
600 * dev->irq can be set if known from device configuration (on
601 * MCA or EISA) or module option. Otherwise, it will be auto
605 ioaddr = dev->base_addr;
609 nicsr = inb(DEPCA_NICSR);
610 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
611 outb(nicsr, DEPCA_NICSR);
613 if (inw(DEPCA_DATA) != STOP) {
617 lp = netdev_priv(dev);
618 mem_start = lp->mem_start;
620 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
623 printk("%s: %s at 0x%04lx",
624 dev_name(device), depca_signature[lp->adapter], ioaddr);
626 switch (lp->depca_bus) {
629 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
635 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
643 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
647 printk(", h/w address ");
648 status = get_hw_addr(dev);
649 printk("%pM", dev->dev_addr);
651 printk(" which has an Ethernet PROM CRC error.\n");
655 /* Set up the maximum amount of network RAM(kB) */
656 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
657 if ((nicsr & _128KB) && (lp->adapter == de422))
660 /* Shared Memory Base Address */
662 nicsr &= ~BS; /* DEPCA RAM in top 32k */
665 /* Only EISA/ISA needs start address to be re-computed */
666 if (lp->depca_bus != DEPCA_BUS_MCA)
670 if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
672 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
676 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
678 /* Enable the shadow RAM. */
679 if (lp->adapter != DEPCA) {
681 outb(nicsr, DEPCA_NICSR);
684 spin_lock_init(&lp->lock);
685 sprintf(lp->adapter_name, "%s (%s)",
686 depca_signature[lp->adapter], dev_name(device));
689 /* Initialisation Block */
690 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
691 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
696 lp->sh_mem = ioremap(mem_start, mem_len);
697 if (lp->sh_mem == NULL) {
698 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
702 lp->mem_start = mem_start;
703 lp->mem_len = mem_len;
704 lp->device_ram_start = mem_start & LA_MASK;
707 offset += sizeof(struct depca_init);
709 /* Tx & Rx descriptors (aligned to a quadword boundary) */
710 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
711 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
712 lp->rx_ring_offset = offset;
714 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
715 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
716 lp->tx_ring_offset = offset;
718 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
720 lp->buffs_offset = offset;
722 /* Finish initialising the ring information. */
723 lp->rxRingMask = NUM_RX_DESC - 1;
724 lp->txRingMask = NUM_TX_DESC - 1;
726 /* Calculate Tx/Rx RLEN size for the descriptors. */
727 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
730 lp->rx_rlen = (s32) (i << 29);
731 for (i = 0, j = lp->txRingMask; j > 0; i++) {
734 lp->tx_rlen = (s32) (i << 29);
736 /* Load the initialisation block */
737 depca_init_ring(dev);
739 /* Initialise the control and status registers */
742 /* Enable DEPCA board interrupts for autoprobing */
743 nicsr = ((nicsr & ~IM) | IEN);
744 outb(nicsr, DEPCA_NICSR);
746 /* To auto-IRQ we enable the initialization-done and DMA err,
747 interrupts. For now we will always get a DMA error. */
749 unsigned char irqnum;
750 unsigned long irq_mask, delay;
752 irq_mask = probe_irq_on();
754 /* Assign the correct irq list */
755 switch (lp->adapter) {
759 depca_irq = de1xx_irq;
766 depca_irq = de2xx_irq;
769 depca_irq = de422_irq;
773 break; /* Not reached */
776 /* Trigger an initialization just for the interrupt. */
777 outw(INEA | INIT, DEPCA_DATA);
779 delay = jiffies + HZ/50;
780 while (time_before(jiffies, delay))
783 irqnum = probe_irq_off(irq_mask);
787 printk(" and failed to detect IRQ line.\n");
790 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
791 if (irqnum == depca_irq[i]) {
793 printk(" and uses IRQ%d.\n", dev->irq);
797 printk(" but incorrect IRQ line detected.\n");
802 printk(" and assigned IRQ%d.\n", dev->irq);
805 if (depca_debug > 1) {
809 /* The DEPCA-specific entries in the device structure. */
810 dev->netdev_ops = &depca_netdev_ops;
811 dev->watchdog_timeo = TX_TIMEOUT;
815 dev_set_drvdata(device, dev);
816 SET_NETDEV_DEV (dev, device);
818 status = register_netdev(dev);
824 release_mem_region (mem_start, mem_len);
830 static int depca_open(struct net_device *dev)
832 struct depca_private *lp = netdev_priv(dev);
833 u_long ioaddr = dev->base_addr;
838 nicsr = inb(DEPCA_NICSR);
840 /* Make sure the shadow RAM is enabled */
841 if (lp->adapter != DEPCA) {
843 outb(nicsr, DEPCA_NICSR);
846 /* Re-initialize the DEPCA... */
847 depca_init_ring(dev);
852 if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
853 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
857 /* Enable DEPCA board interrupts and turn off LED */
858 nicsr = ((nicsr & ~IM & ~LED) | IEN);
859 outb(nicsr, DEPCA_NICSR);
860 outw(CSR0, DEPCA_ADDR);
862 netif_start_queue(dev);
864 status = InitRestartDepca(dev);
866 if (depca_debug > 1) {
867 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
868 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
874 /* Initialize the lance Rx and Tx descriptor rings. */
875 static void depca_init_ring(struct net_device *dev)
877 struct depca_private *lp = netdev_priv(dev);
881 /* Lock out other processes whilst setting up the hardware */
882 netif_stop_queue(dev);
884 lp->rx_new = lp->tx_new = 0;
885 lp->rx_old = lp->tx_old = 0;
887 /* Initialize the base address and length of each buffer in the ring */
888 for (i = 0; i <= lp->rxRingMask; i++) {
889 offset = lp->buffs_offset + i * RX_BUFF_SZ;
890 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
891 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
892 lp->rx_buff[i] = lp->sh_mem + offset;
895 for (i = 0; i <= lp->txRingMask; i++) {
896 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
897 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
898 lp->tx_buff[i] = lp->sh_mem + offset;
901 /* Set up the initialization block */
902 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
903 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
905 SetMulticastFilter(dev);
907 for (i = 0; i < ETH_ALEN; i++) {
908 lp->init_block.phys_addr[i] = dev->dev_addr[i];
911 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
915 static void depca_tx_timeout(struct net_device *dev)
917 u_long ioaddr = dev->base_addr;
919 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
922 depca_init_ring(dev);
924 dev->trans_start = jiffies; /* prevent tx timeout */
925 netif_wake_queue(dev);
926 InitRestartDepca(dev);
931 ** Writes a socket buffer to TX descriptor ring and starts transmission
933 static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
934 struct net_device *dev)
936 struct depca_private *lp = netdev_priv(dev);
937 u_long ioaddr = dev->base_addr;
940 /* Transmitter timeout, serious problems. */
944 if (skb_padto(skb, ETH_ZLEN))
947 netif_stop_queue(dev);
949 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
950 status = load_packet(dev, skb);
953 /* Trigger an immediate send demand. */
954 outw(CSR0, DEPCA_ADDR);
955 outw(INEA | TDMD, DEPCA_DATA);
960 netif_start_queue(dev);
962 status = NETDEV_TX_LOCKED;
969 ** The DEPCA interrupt handler.
971 static irqreturn_t depca_interrupt(int irq, void *dev_id)
973 struct net_device *dev = dev_id;
974 struct depca_private *lp;
979 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
983 lp = netdev_priv(dev);
984 ioaddr = dev->base_addr;
986 spin_lock(&lp->lock);
988 /* mask the DEPCA board interrupts and turn on the LED */
989 nicsr = inb(DEPCA_NICSR);
991 outb(nicsr, DEPCA_NICSR);
993 outw(CSR0, DEPCA_ADDR);
994 csr0 = inw(DEPCA_DATA);
996 /* Acknowledge all of the current interrupt sources ASAP. */
997 outw(csr0 & INTE, DEPCA_DATA);
999 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
1002 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1005 /* Any resources available? */
1006 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1007 netif_wake_queue(dev);
1010 /* Unmask the DEPCA board interrupts and turn off the LED */
1011 nicsr = (nicsr & ~IM & ~LED);
1012 outb(nicsr, DEPCA_NICSR);
1014 spin_unlock(&lp->lock);
1018 /* Called with lp->lock held */
1019 static int depca_rx(struct net_device *dev)
1021 struct depca_private *lp = netdev_priv(dev);
1025 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1026 status = readl(&lp->rx_ring[entry].base) >> 16;
1027 if (status & R_STP) { /* Remember start of frame */
1030 if (status & R_ENP) { /* Valid frame status */
1031 if (status & R_ERR) { /* There was an error. */
1032 dev->stats.rx_errors++; /* Update the error stats. */
1033 if (status & R_FRAM)
1034 dev->stats.rx_frame_errors++;
1035 if (status & R_OFLO)
1036 dev->stats.rx_over_errors++;
1038 dev->stats.rx_crc_errors++;
1039 if (status & R_BUFF)
1040 dev->stats.rx_fifo_errors++;
1042 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1043 struct sk_buff *skb;
1045 skb = dev_alloc_skb(pkt_len + 2);
1048 skb_reserve(skb, 2); /* 16 byte align the IP header */
1049 buf = skb_put(skb, pkt_len);
1050 if (entry < lp->rx_old) { /* Wrapped buffer */
1051 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1052 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1053 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1054 } else { /* Linear buffer */
1055 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1059 ** Notify the upper protocol layers that there is another
1062 skb->protocol = eth_type_trans(skb, dev);
1068 dev->stats.rx_packets++;
1069 dev->stats.rx_bytes += pkt_len;
1070 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1071 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1072 lp->pktStats.bins[i]++;
1073 i = DEPCA_PKT_STAT_SZ;
1076 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1077 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1078 lp->pktStats.broadcast++;
1080 lp->pktStats.multicast++;
1082 } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1083 lp->pktStats.unicast++;
1086 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1087 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1088 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1091 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1092 dev->stats.rx_dropped++; /* Really, deferred. */
1096 /* Change buffer ownership for this last frame, back to the adapter */
1097 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1098 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1100 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1104 ** Update entry information
1106 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1113 ** Buffer sent - check for buffer errors.
1114 ** Called with lp->lock held
1116 static int depca_tx(struct net_device *dev)
1118 struct depca_private *lp = netdev_priv(dev);
1121 u_long ioaddr = dev->base_addr;
1123 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1124 status = readl(&lp->tx_ring[entry].base) >> 16;
1126 if (status < 0) { /* Packet not yet sent! */
1128 } else if (status & T_ERR) { /* An error occurred. */
1129 status = readl(&lp->tx_ring[entry].misc);
1130 dev->stats.tx_errors++;
1131 if (status & TMD3_RTRY)
1132 dev->stats.tx_aborted_errors++;
1133 if (status & TMD3_LCAR)
1134 dev->stats.tx_carrier_errors++;
1135 if (status & TMD3_LCOL)
1136 dev->stats.tx_window_errors++;
1137 if (status & TMD3_UFLO)
1138 dev->stats.tx_fifo_errors++;
1139 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1140 /* Trigger an immediate send demand. */
1141 outw(CSR0, DEPCA_ADDR);
1142 outw(INEA | TDMD, DEPCA_DATA);
1144 } else if (status & (T_MORE | T_ONE)) {
1145 dev->stats.collisions++;
1147 dev->stats.tx_packets++;
1150 /* Update all the pointers */
1151 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1157 static int depca_close(struct net_device *dev)
1159 struct depca_private *lp = netdev_priv(dev);
1161 u_long ioaddr = dev->base_addr;
1163 netif_stop_queue(dev);
1165 outw(CSR0, DEPCA_ADDR);
1167 if (depca_debug > 1) {
1168 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1172 ** We stop the DEPCA here -- it occasionally polls
1173 ** memory if we don't.
1175 outw(STOP, DEPCA_DATA);
1178 ** Give back the ROM in case the user wants to go to DOS
1180 if (lp->adapter != DEPCA) {
1181 nicsr = inb(DEPCA_NICSR);
1183 outb(nicsr, DEPCA_NICSR);
1187 ** Free the associated irq
1189 free_irq(dev->irq, dev);
1193 static void LoadCSRs(struct net_device *dev)
1195 struct depca_private *lp = netdev_priv(dev);
1196 u_long ioaddr = dev->base_addr;
1198 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1199 outw((u16) lp->device_ram_start, DEPCA_DATA);
1200 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1201 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1202 outw(CSR3, DEPCA_ADDR); /* ALE control */
1203 outw(ACON, DEPCA_DATA);
1205 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1210 static int InitRestartDepca(struct net_device *dev)
1212 struct depca_private *lp = netdev_priv(dev);
1213 u_long ioaddr = dev->base_addr;
1216 /* Copy the shadow init_block to shared memory */
1217 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1219 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1220 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1222 /* wait for lance to complete initialisation */
1223 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1226 /* clear IDON by writing a "1", enable interrupts and start lance */
1227 outw(IDON | INEA | STRT, DEPCA_DATA);
1228 if (depca_debug > 2) {
1229 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1232 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1240 ** Set or clear the multicast filter for this adaptor.
1242 static void set_multicast_list(struct net_device *dev)
1244 struct depca_private *lp = netdev_priv(dev);
1245 u_long ioaddr = dev->base_addr;
1247 netif_stop_queue(dev);
1248 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1250 STOP_DEPCA; /* Temporarily stop the depca. */
1251 depca_init_ring(dev); /* Initialize the descriptor rings */
1253 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1254 lp->init_block.mode |= PROM;
1256 SetMulticastFilter(dev);
1257 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1260 LoadCSRs(dev); /* Reload CSR3 */
1261 InitRestartDepca(dev); /* Resume normal operation. */
1262 netif_start_queue(dev); /* Unlock the TX ring */
1266 ** Calculate the hash code and update the logical address filter
1267 ** from a list of ethernet multicast addresses.
1268 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1269 ** LANCE calculates its hash codes big endian.
1271 static void SetMulticastFilter(struct net_device *dev)
1273 struct depca_private *lp = netdev_priv(dev);
1274 struct netdev_hw_addr *ha;
1276 int i, j, bit, byte;
1280 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1281 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1282 lp->init_block.mcast_table[i] = (char) 0xff;
1285 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1286 lp->init_block.mcast_table[i] = 0;
1288 /* Add multicast addresses */
1289 netdev_for_each_mc_addr(ha, dev) {
1291 if ((*addrs & 0x01) == 1) { /* multicast address? */
1292 crc = ether_crc(ETH_ALEN, addrs);
1293 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1294 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1295 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1299 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1300 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1301 lp->init_block.mcast_table[byte] |= bit;
1309 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1313 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1318 if (DevicePresent(ioaddr)) {
1323 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1331 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1338 ** Microchannel bus I/O device probe
1340 static int __init depca_mca_probe(struct device *device)
1342 unsigned char pos[2];
1343 unsigned char where;
1344 unsigned long iobase, mem_start;
1346 struct mca_device *mdev = to_mca_device (device);
1347 struct net_device *dev;
1348 struct depca_private *lp;
1351 ** Search for the adapter. If an address has been given, search
1352 ** specifically for the card at that address. Otherwise find the
1353 ** first card in the system.
1356 pos[0] = mca_device_read_stored_pos(mdev, 2);
1357 pos[1] = mca_device_read_stored_pos(mdev, 3);
1360 ** IO of card is handled by bits 1 and 2 of pos0.
1368 where = (pos[0] & 6) >> 1;
1369 iobase = 0x2c00 + (0x10 * where);
1372 ** Found the adapter we were looking for. Now start setting it up.
1374 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1375 ** of pos1. Bits are as follows (from the ADF file):
1379 ** --------------------
1385 where = pos[1] & 0x0f;
1400 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1405 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1406 ** They are mapped as follows:
1409 ** 5 4 3 Memory Addresses
1410 ** 0 0 0 C0000-CFFFF (64K)
1411 ** 1 0 0 C8000-CFFFF (32K)
1412 ** 0 0 1 D0000-DFFFF (64K)
1413 ** 1 0 1 D8000-DFFFF (32K)
1414 ** 0 1 0 E0000-EFFFF (64K)
1415 ** 1 1 0 E8000-EFFFF (32K)
1417 where = (pos[0] & 0x18) >> 3;
1418 mem_start = 0xc0000 + (where * 0x10000);
1419 if (pos[0] & 0x20) {
1420 mem_start += 0x8000;
1423 /* claim the slot */
1424 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1425 sizeof(mdev->name));
1426 mca_device_set_claim(mdev, 1);
1429 ** Get everything allocated and initialized... (almost just
1430 ** like the ISA and EISA probes)
1432 irq = mca_device_transform_irq(mdev, irq);
1433 iobase = mca_device_transform_ioport(mdev, iobase);
1435 if ((err = depca_common_init (iobase, &dev)))
1439 dev->base_addr = iobase;
1440 lp = netdev_priv(dev);
1441 lp->depca_bus = DEPCA_BUS_MCA;
1442 lp->adapter = depca_mca_adapter_type[mdev->index];
1443 lp->mem_start = mem_start;
1445 if ((err = depca_hw_init(dev, device)))
1452 release_region (iobase, DEPCA_TOTAL_SIZE);
1454 mca_device_set_claim(mdev, 0);
1461 ** ISA bus I/O device probe
1464 static void __init depca_platform_probe (void)
1467 struct platform_device *pldev;
1469 for (i = 0; depca_io_ports[i].iobase; i++) {
1470 depca_io_ports[i].device = NULL;
1472 /* if an address has been specified on the command
1473 * line, use it (if valid) */
1474 if (io && io != depca_io_ports[i].iobase)
1477 pldev = platform_device_alloc(depca_string, i);
1481 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1482 depca_io_ports[i].device = pldev;
1484 if (platform_device_add(pldev)) {
1485 depca_io_ports[i].device = NULL;
1486 pldev->dev.platform_data = NULL;
1487 platform_device_put(pldev);
1491 if (!pldev->dev.driver) {
1492 /* The driver was not bound to this device, there was
1493 * no hardware at this address. Unregister it, as the
1494 * release fuction will take care of freeing the
1495 * allocated structure */
1497 depca_io_ports[i].device = NULL;
1498 pldev->dev.platform_data = NULL;
1499 platform_device_unregister (pldev);
1504 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1506 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1507 enum depca_type adapter = unknown;
1510 for (i = 0; mem_base[i]; i++) {
1511 *mem_start = mem ? mem : mem_base[i];
1512 adapter = DepcaSignature (adapter_name, *mem_start);
1513 if (adapter != unknown)
1520 static int __init depca_isa_probe (struct platform_device *device)
1522 struct net_device *dev;
1523 struct depca_private *lp;
1524 u_long ioaddr, mem_start = 0;
1525 enum depca_type adapter = unknown;
1528 ioaddr = (u_long) device->dev.platform_data;
1530 if ((status = depca_common_init (ioaddr, &dev)))
1533 adapter = depca_shmem_probe (&mem_start);
1535 if (adapter == unknown) {
1540 dev->base_addr = ioaddr;
1541 dev->irq = irq; /* Use whatever value the user gave
1542 * us, and 0 if he didn't. */
1543 lp = netdev_priv(dev);
1544 lp->depca_bus = DEPCA_BUS_ISA;
1545 lp->adapter = adapter;
1546 lp->mem_start = mem_start;
1548 if ((status = depca_hw_init(dev, &device->dev)))
1555 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1561 ** EISA callbacks from sysfs.
1565 static int __init depca_eisa_probe (struct device *device)
1567 enum depca_type adapter = unknown;
1568 struct eisa_device *edev;
1569 struct net_device *dev;
1570 struct depca_private *lp;
1571 u_long ioaddr, mem_start;
1574 edev = to_eisa_device (device);
1575 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1577 if ((status = depca_common_init (ioaddr, &dev)))
1580 /* It would have been nice to get card configuration from the
1581 * card. Unfortunately, this register is write-only (shares
1582 * it's address with the ethernet prom)... As we don't parse
1583 * the EISA configuration structures (yet... :-), just rely on
1584 * the ISA probing to sort it out... */
1586 adapter = depca_shmem_probe (&mem_start);
1587 if (adapter == unknown) {
1592 dev->base_addr = ioaddr;
1594 lp = netdev_priv(dev);
1595 lp->depca_bus = DEPCA_BUS_EISA;
1596 lp->adapter = edev->id.driver_data;
1597 lp->mem_start = mem_start;
1599 if ((status = depca_hw_init(dev, device)))
1606 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1612 static int __devexit depca_device_remove (struct device *device)
1614 struct net_device *dev;
1615 struct depca_private *lp;
1618 dev = dev_get_drvdata(device);
1619 lp = netdev_priv(dev);
1621 unregister_netdev (dev);
1622 iounmap (lp->sh_mem);
1623 release_mem_region (lp->mem_start, lp->mem_len);
1624 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1625 bus = lp->depca_bus;
1632 ** Look for a particular board name in the on-board Remote Diagnostics
1633 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1636 static int __init DepcaSignature(char *name, u_long base_addr)
1641 u_long prom_addr = base_addr + 0xc000;
1642 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1644 /* Can't reserve the prom region, it is already marked as
1645 * used, at least on x86. Instead, reserve a memory region a
1646 * board would certainly use. If it works, go ahead. If not,
1647 * run like hell... */
1649 if (!request_mem_region (mem_addr, 16, depca_string))
1652 /* Copy the first 16 bytes of ROM */
1654 ptr = ioremap(prom_addr, 16);
1656 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1659 for (i = 0; i < 16; i++) {
1660 tmpstr[i] = readb(ptr + i);
1664 release_mem_region (mem_addr, 16);
1666 /* Check if PROM contains a valid string */
1667 for (i = 0; *depca_signature[i] != '\0'; i++) {
1668 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1669 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1671 } else { /* lost signature; begin search again */
1675 if (k == strlen(depca_signature[i]))
1679 /* Check if name string is valid, provided there's no PROM */
1680 if (name && *name && (i == unknown)) {
1681 for (i = 0; *depca_signature[i] != '\0'; i++) {
1682 if (strcmp(name, depca_signature[i]) == 0)
1691 ** Look for a special sequence in the Ethernet station address PROM that
1692 ** is common across all DEPCA products. Note that the original DEPCA needs
1693 ** its ROM address counter to be initialized and enabled. Only enable
1694 ** if the first address octet is a 0x08 - this minimises the chances of
1695 ** messing around with some other hardware, but it assumes that this DEPCA
1696 ** card initialized itself correctly.
1698 ** Search the Ethernet address ROM for the signature. Since the ROM address
1699 ** counter can start at an arbitrary point, the search must include the entire
1700 ** probe sequence length plus the (length_of_the_signature - 1).
1701 ** Stop the search IMMEDIATELY after the signature is found so that the
1702 ** PROM address counter is correctly positioned at the start of the
1703 ** ethernet address for later read out.
1705 static int __init DevicePresent(u_long ioaddr)
1712 char Sig[sizeof(u32) << 1];
1715 short sigLength = 0;
1718 int i, j, status = 0;
1720 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1721 data = inb(DEPCA_PROM); /* read data */
1723 if (data == 0x08) { /* Enable counter on DEPCA */
1724 nicsr = inb(DEPCA_NICSR);
1726 outb(nicsr, DEPCA_NICSR);
1729 dev.llsig.a = ETH_PROM_SIG;
1730 dev.llsig.b = ETH_PROM_SIG;
1731 sigLength = sizeof(u32) << 1;
1733 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1734 data = inb(DEPCA_PROM);
1735 if (dev.Sig[j] == data) { /* track signature */
1737 } else { /* lost signature; begin search again */
1738 if (data == dev.Sig[0]) { /* rare case.... */
1746 if (j != sigLength) {
1747 status = -ENODEV; /* search failed */
1754 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1755 ** reason: access the upper half of the PROM with x=0; access the lower half
1758 static int __init get_hw_addr(struct net_device *dev)
1760 u_long ioaddr = dev->base_addr;
1761 struct depca_private *lp = netdev_priv(dev);
1762 int i, k, tmp, status = 0;
1763 u_short j, x, chksum;
1765 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1767 for (i = 0, k = 0, j = 0; j < 3; j++) {
1772 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1773 dev->dev_addr[i++] = (u_char) tmp;
1774 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1775 dev->dev_addr[i++] = (u_char) tmp;
1783 chksum = (u_char) inb(DEPCA_PROM + x);
1784 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1792 ** Load a packet into the shared memory
1794 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1796 struct depca_private *lp = netdev_priv(dev);
1797 int i, entry, end, len, status = NETDEV_TX_OK;
1799 entry = lp->tx_new; /* Ring around buffer number. */
1800 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1801 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1803 ** Caution: the write order is important here... don't set up the
1804 ** ownership rights until all the other information is in place.
1806 if (end < entry) { /* wrapped buffer */
1807 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1808 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1809 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1810 } else { /* linear buffer */
1811 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1814 /* set up the buffer descriptors */
1815 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1816 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1817 /* clean out flags */
1818 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1819 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1820 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1823 /* clean out flags */
1824 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1825 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1826 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1828 /* start of packet */
1829 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1831 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1833 for (i = end; i != entry; --i) {
1834 /* ownership of packet */
1835 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1837 i = lp->txRingMask + 1;
1839 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1841 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1843 status = NETDEV_TX_LOCKED;
1849 static void depca_dbg_open(struct net_device *dev)
1851 struct depca_private *lp = netdev_priv(dev);
1852 u_long ioaddr = dev->base_addr;
1853 struct depca_init *p = &lp->init_block;
1856 if (depca_debug > 1) {
1857 /* Do not copy the shadow init block into shared memory */
1858 /* Debugging should not affect normal operation! */
1859 /* The shadow init block will get copied across during InitRestartDepca */
1860 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1861 printk("Descriptor head addresses (CPU):\n");
1862 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1863 printk("Descriptor addresses (CPU):\nRX: ");
1864 for (i = 0; i < lp->rxRingMask; i++) {
1866 printk("%p ", &lp->rx_ring[i].base);
1869 printk("...%p\n", &lp->rx_ring[i].base);
1871 for (i = 0; i < lp->txRingMask; i++) {
1873 printk("%p ", &lp->tx_ring[i].base);
1876 printk("...%p\n", &lp->tx_ring[i].base);
1877 printk("\nDescriptor buffers (Device):\nRX: ");
1878 for (i = 0; i < lp->rxRingMask; i++) {
1880 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1883 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1885 for (i = 0; i < lp->txRingMask; i++) {
1887 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1890 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1891 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1892 printk(" mode: 0x%4.4x\n", p->mode);
1893 printk(" physical address: %pM\n", p->phys_addr);
1894 printk(" multicast hash table: ");
1895 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1896 printk("%2.2x:", p->mcast_table[i]);
1898 printk("%2.2x\n", p->mcast_table[i]);
1899 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1900 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1901 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1902 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1903 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1904 outw(CSR2, DEPCA_ADDR);
1905 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1906 outw(CSR1, DEPCA_ADDR);
1907 printk("%4.4x\n", inw(DEPCA_DATA));
1908 outw(CSR3, DEPCA_ADDR);
1909 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1916 ** Perform IOCTL call functions here. Some are privileged operations and the
1917 ** effective uid is checked in those cases.
1918 ** All multicast IOCTLs will not work here and are for testing purposes only.
1920 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1922 struct depca_private *lp = netdev_priv(dev);
1923 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1925 u_long ioaddr = dev->base_addr;
1927 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1928 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1929 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1931 unsigned long flags;
1935 case DEPCA_GET_HWADDR: /* Get the hardware address */
1936 for (i = 0; i < ETH_ALEN; i++) {
1937 tmp.addr[i] = dev->dev_addr[i];
1939 ioc->len = ETH_ALEN;
1940 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1944 case DEPCA_SET_HWADDR: /* Set the hardware address */
1945 if (!capable(CAP_NET_ADMIN))
1947 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1949 for (i = 0; i < ETH_ALEN; i++) {
1950 dev->dev_addr[i] = tmp.addr[i];
1952 netif_stop_queue(dev);
1953 while (lp->tx_old != lp->tx_new)
1954 cpu_relax(); /* Wait for the ring to empty */
1956 STOP_DEPCA; /* Temporarily stop the depca. */
1957 depca_init_ring(dev); /* Initialize the descriptor rings */
1958 LoadCSRs(dev); /* Reload CSR3 */
1959 InitRestartDepca(dev); /* Resume normal operation. */
1960 netif_start_queue(dev); /* Unlock the TX ring */
1963 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1964 if (!capable(CAP_NET_ADMIN))
1966 netif_stop_queue(dev);
1967 while (lp->tx_old != lp->tx_new)
1968 cpu_relax(); /* Wait for the ring to empty */
1970 STOP_DEPCA; /* Temporarily stop the depca. */
1971 depca_init_ring(dev); /* Initialize the descriptor rings */
1972 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1974 LoadCSRs(dev); /* Reload CSR3 */
1975 InitRestartDepca(dev); /* Resume normal operation. */
1976 netif_start_queue(dev); /* Unlock the TX ring */
1979 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1980 if (!capable(CAP_NET_ADMIN))
1982 netif_stop_queue(dev);
1983 while (lp->tx_old != lp->tx_new)
1984 cpu_relax(); /* Wait for the ring to empty */
1986 STOP_DEPCA; /* Temporarily stop the depca. */
1987 depca_init_ring(dev); /* Initialize the descriptor rings */
1988 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1990 LoadCSRs(dev); /* Reload CSR3 */
1991 InitRestartDepca(dev); /* Resume normal operation. */
1992 netif_start_queue(dev); /* Unlock the TX ring */
1995 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
1996 if(!capable(CAP_NET_ADMIN))
1998 printk("%s: Boo!\n", dev->name);
2001 case DEPCA_GET_MCA: /* Get the multicast address table */
2002 ioc->len = (HASH_TABLE_LEN >> 3);
2003 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2007 case DEPCA_SET_MCA: /* Set a multicast address */
2008 if (!capable(CAP_NET_ADMIN))
2010 if (ioc->len >= HASH_TABLE_LEN)
2012 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2014 set_multicast_list(dev);
2017 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2018 if (!capable(CAP_NET_ADMIN))
2020 set_multicast_list(dev);
2023 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2024 if (!capable(CAP_NET_ADMIN))
2026 set_multicast_list(dev);
2029 case DEPCA_GET_STATS: /* Get the driver statistics */
2030 ioc->len = sizeof(lp->pktStats);
2031 buf = kmalloc(ioc->len, GFP_KERNEL);
2034 spin_lock_irqsave(&lp->lock, flags);
2035 memcpy(buf, &lp->pktStats, ioc->len);
2036 spin_unlock_irqrestore(&lp->lock, flags);
2037 if (copy_to_user(ioc->data, buf, ioc->len))
2042 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2043 if (!capable(CAP_NET_ADMIN))
2045 spin_lock_irqsave(&lp->lock, flags);
2046 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2047 spin_unlock_irqrestore(&lp->lock, flags);
2050 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2052 tmp.sval[i++] = inw(DEPCA_NICSR);
2053 outw(CSR0, DEPCA_ADDR); /* status register */
2054 tmp.sval[i++] = inw(DEPCA_DATA);
2055 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2056 ioc->len = i + sizeof(struct depca_init);
2057 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2068 static int __init depca_module_init (void)
2073 err = mca_register_driver (&depca_mca_driver);
2076 err |= eisa_driver_register (&depca_eisa_driver);
2078 err |= platform_driver_register (&depca_isa_driver);
2079 depca_platform_probe ();
2084 static void __exit depca_module_exit (void)
2088 mca_unregister_driver (&depca_mca_driver);
2091 eisa_driver_unregister (&depca_eisa_driver);
2093 platform_driver_unregister (&depca_isa_driver);
2095 for (i = 0; depca_io_ports[i].iobase; i++) {
2096 if (depca_io_ports[i].device) {
2097 depca_io_ports[i].device->dev.platform_data = NULL;
2098 platform_device_unregister (depca_io_ports[i].device);
2099 depca_io_ports[i].device = NULL;
2104 module_init (depca_module_init);
2105 module_exit (depca_module_exit);