1 /* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner".
4 Donald Becker, becker@scyld.com, (driver core) and
5 David Hinds, dahinds@users.sourceforge.net (from his PC card code).
6 Locking fixes (C) Copyright 2003 Red Hat Inc
8 This software may be used and distributed according to the terms of
9 the GNU General Public License, incorporated herein by reference.
11 This driver derives from Donald Becker's 3c509 core, which has the
13 Copyright 1993 United States Government as represented by the
14 Director, National Security Agency.
22 I. Board Compatibility
24 This device driver is designed for the 3Com 3c574 PC card Fast Ethernet
27 II. Board-specific settings
29 None -- PC cards are autoconfigured.
33 The 3c574 uses a Boomerang-style interface, without the bus-master capability.
34 See the Boomerang driver and documentation for most details.
36 IV. Notes and chip documentation.
38 Two added registers are used to enhance PIO performance, RunnerRdCtrl and
39 RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the
40 count of word (16 bits) reads or writes the driver is about to do to the Rx
41 or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card
42 translation latency by buffering the I/O operations with an 8 word FIFO.
43 Note: No other chip accesses are permitted when this buffer is used.
45 A second enhancement is that both attribute and common memory space
46 0x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster
47 with *some* PCcard bridges) may be used instead of I/O operations.
48 This is enabled by setting the 0x10 bit in the PCMCIA LAN COR.
50 Some slow PC card bridges work better if they never see a WAIT signal.
51 This is configured by setting the 0x20 bit in the PCMCIA LAN COR.
52 Only do this after testing that it is reliable and improves performance.
54 The upper five bits of RunnerRdCtrl are used to window into PCcard
55 configuration space registers. Window 0 is the regular Boomerang/Odie
56 register set, 1-5 are various PC card control registers, and 16-31 are
57 the (reversed!) CIS table.
59 A final note: writing the InternalConfig register in window 3 with an
60 invalid ramWidth is Very Bad.
64 http://www.scyld.com/expert/NWay.html
65 http://www.national.com/pf/DP/DP83840.html
67 Thanks to Terry Murphy of 3Com for providing development information for
68 earlier 3Com products.
72 #include <linux/module.h>
73 #include <linux/kernel.h>
74 #include <linux/init.h>
75 #include <linux/slab.h>
76 #include <linux/string.h>
77 #include <linux/timer.h>
78 #include <linux/interrupt.h>
80 #include <linux/delay.h>
81 #include <linux/netdevice.h>
82 #include <linux/etherdevice.h>
83 #include <linux/skbuff.h>
84 #include <linux/if_arp.h>
85 #include <linux/ioport.h>
86 #include <linux/ethtool.h>
87 #include <linux/bitops.h>
89 #include <pcmcia/cs_types.h>
90 #include <pcmcia/cs.h>
91 #include <pcmcia/cistpl.h>
92 #include <pcmcia/cisreg.h>
93 #include <pcmcia/ciscode.h>
94 #include <pcmcia/ds.h>
95 #include <pcmcia/mem_op.h>
97 #include <asm/uaccess.h>
99 #include <asm/system.h>
101 /*====================================================================*/
103 /* Module parameters */
105 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
106 MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver");
107 MODULE_LICENSE("GPL");
109 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
111 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
112 INT_MODULE_PARM(max_interrupt_work
, 32);
114 /* Force full duplex modes? */
115 INT_MODULE_PARM(full_duplex
, 0);
117 /* Autodetect link polarity reversal? */
118 INT_MODULE_PARM(auto_polarity
, 1);
121 INT_MODULE_PARM(pc_debug
, PCMCIA_DEBUG
);
122 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
123 static char *version
=
124 "3c574_cs.c 1.65ac1 2003/04/07 Donald Becker/David Hinds, becker@scyld.com.\n";
126 #define DEBUG(n, args...)
129 /*====================================================================*/
131 /* Time in jiffies before concluding the transmitter is hung. */
132 #define TX_TIMEOUT ((800*HZ)/1000)
134 /* To minimize the size of the driver source and make the driver more
135 readable not all constants are symbolically defined.
136 You'll need the manual if you want to understand driver details anyway. */
137 /* Offsets from base I/O address. */
138 #define EL3_DATA 0x00
140 #define EL3_STATUS 0x0e
142 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
144 /* The top five bits written to EL3_CMD are a command, the lower
145 11 bits are the parameter, if applicable. */
147 TotalReset
= 0<<11, SelectWindow
= 1<<11, StartCoax
= 2<<11,
148 RxDisable
= 3<<11, RxEnable
= 4<<11, RxReset
= 5<<11, RxDiscard
= 8<<11,
149 TxEnable
= 9<<11, TxDisable
= 10<<11, TxReset
= 11<<11,
150 FakeIntr
= 12<<11, AckIntr
= 13<<11, SetIntrEnb
= 14<<11,
151 SetStatusEnb
= 15<<11, SetRxFilter
= 16<<11, SetRxThreshold
= 17<<11,
152 SetTxThreshold
= 18<<11, SetTxStart
= 19<<11, StatsEnable
= 21<<11,
153 StatsDisable
= 22<<11, StopCoax
= 23<<11,
157 IntLatch
= 0x0001, AdapterFailure
= 0x0002, TxComplete
= 0x0004,
158 TxAvailable
= 0x0008, RxComplete
= 0x0010, RxEarly
= 0x0020,
159 IntReq
= 0x0040, StatsFull
= 0x0080, CmdBusy
= 0x1000 };
161 /* The SetRxFilter command accepts the following classes: */
163 RxStation
= 1, RxMulticast
= 2, RxBroadcast
= 4, RxProm
= 8
167 Wn0EepromCmd
= 10, Wn0EepromData
= 12, /* EEPROM command/address, data. */
168 IntrStatus
=0x0E, /* Valid in all windows. */
170 /* These assumes the larger EEPROM. */
171 enum Win0_EEPROM_cmds
{
172 EEPROM_Read
= 0x200, EEPROM_WRITE
= 0x100, EEPROM_ERASE
= 0x300,
173 EEPROM_EWENB
= 0x30, /* Enable erasing/writing for 10 msec. */
174 EEPROM_EWDIS
= 0x00, /* Disable EWENB before 10 msec timeout. */
177 /* Register window 1 offsets, the window used in normal operation.
178 On the "Odie" this window is always mapped at offsets 0x10-0x1f.
179 Except for TxFree, which is overlapped by RunnerWrCtrl. */
181 TX_FIFO
= 0x10, RX_FIFO
= 0x10, RxErrors
= 0x14,
182 RxStatus
= 0x18, Timer
=0x1A, TxStatus
= 0x1B,
183 TxFree
= 0x0C, /* Remaining free bytes in Tx buffer. */
184 RunnerRdCtrl
= 0x16, RunnerWrCtrl
= 0x1c,
187 enum Window3
{ /* Window 3: MAC/config bits. */
188 Wn3_Config
=0, Wn3_MAC_Ctrl
=6, Wn3_Options
=8,
192 struct w3_config_fields
{
193 unsigned int ram_size
:3, ram_width
:1, ram_speed
:2, rom_size
:2;
195 unsigned int ram_split
:2, pad18
:2, xcvr
:3, pad21
:1, autoselect
:1;
200 enum Window4
{ /* Window 4: Xcvr/media bits. */
201 Wn4_FIFODiag
= 4, Wn4_NetDiag
= 6, Wn4_PhysicalMgmt
=8, Wn4_Media
= 10,
204 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
207 struct pcmcia_device
*p_dev
;
209 struct net_device_stats stats
;
210 u16 advertising
, partner
; /* NWay media advertisement */
211 unsigned char phys
; /* MII device address */
212 unsigned int autoselect
:1, default_media
:3; /* Read from the EEPROM/Wn3_Config. */
213 /* for transceiver monitoring */
214 struct timer_list media
;
215 unsigned short media_status
;
216 unsigned short fast_poll
;
217 unsigned long last_irq
;
218 spinlock_t window_lock
; /* Guards the Window selection */
221 /* Set iff a MII transceiver on any interface requires mdio preamble.
222 This only set with the original DP83840 on older 3c905 boards, so the extra
223 code size of a per-interface flag is not worthwhile. */
224 static char mii_preamble_required
= 0;
226 /* Index of functions. */
228 static int tc574_config(struct pcmcia_device
*link
);
229 static void tc574_release(struct pcmcia_device
*link
);
231 static void mdio_sync(kio_addr_t ioaddr
, int bits
);
232 static int mdio_read(kio_addr_t ioaddr
, int phy_id
, int location
);
233 static void mdio_write(kio_addr_t ioaddr
, int phy_id
, int location
, int value
);
234 static unsigned short read_eeprom(kio_addr_t ioaddr
, int index
);
235 static void tc574_wait_for_completion(struct net_device
*dev
, int cmd
);
237 static void tc574_reset(struct net_device
*dev
);
238 static void media_check(unsigned long arg
);
239 static int el3_open(struct net_device
*dev
);
240 static int el3_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
241 static irqreturn_t
el3_interrupt(int irq
, void *dev_id
);
242 static void update_stats(struct net_device
*dev
);
243 static struct net_device_stats
*el3_get_stats(struct net_device
*dev
);
244 static int el3_rx(struct net_device
*dev
, int worklimit
);
245 static int el3_close(struct net_device
*dev
);
246 static void el3_tx_timeout(struct net_device
*dev
);
247 static int el3_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
248 static const struct ethtool_ops netdev_ethtool_ops
;
249 static void set_rx_mode(struct net_device
*dev
);
251 static void tc574_detach(struct pcmcia_device
*p_dev
);
254 tc574_attach() creates an "instance" of the driver, allocating
255 local data structures for one device. The device is registered
259 static int tc574_probe(struct pcmcia_device
*link
)
261 struct el3_private
*lp
;
262 struct net_device
*dev
;
264 DEBUG(0, "3c574_attach()\n");
266 /* Create the PC card device object. */
267 dev
= alloc_etherdev(sizeof(struct el3_private
));
270 lp
= netdev_priv(dev
);
274 spin_lock_init(&lp
->window_lock
);
275 link
->io
.NumPorts1
= 32;
276 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
277 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
| IRQ_HANDLE_PRESENT
;
278 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
279 link
->irq
.Handler
= &el3_interrupt
;
280 link
->irq
.Instance
= dev
;
281 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
282 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
283 link
->conf
.ConfigIndex
= 1;
285 /* The EL3-specific entries in the device structure. */
286 dev
->hard_start_xmit
= &el3_start_xmit
;
287 dev
->get_stats
= &el3_get_stats
;
288 dev
->do_ioctl
= &el3_ioctl
;
289 SET_ETHTOOL_OPS(dev
, &netdev_ethtool_ops
);
290 dev
->set_multicast_list
= &set_rx_mode
;
291 dev
->open
= &el3_open
;
292 dev
->stop
= &el3_close
;
293 #ifdef HAVE_TX_TIMEOUT
294 dev
->tx_timeout
= el3_tx_timeout
;
295 dev
->watchdog_timeo
= TX_TIMEOUT
;
298 return tc574_config(link
);
303 This deletes a driver "instance". The device is de-registered
304 with Card Services. If it has been released, all local data
305 structures are freed. Otherwise, the structures will be freed
306 when the device is released.
310 static void tc574_detach(struct pcmcia_device
*link
)
312 struct net_device
*dev
= link
->priv
;
314 DEBUG(0, "3c574_detach(0x%p)\n", link
);
317 unregister_netdev(dev
);
325 tc574_config() is scheduled to run after a CARD_INSERTION event
326 is received, to configure the PCMCIA socket, and to make the
327 ethernet device available to the system.
330 #define CS_CHECK(fn, ret) \
331 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
333 static const char *ram_split
[] = {"5:3", "3:1", "1:1", "3:5"};
335 static int tc574_config(struct pcmcia_device
*link
)
337 struct net_device
*dev
= link
->priv
;
338 struct el3_private
*lp
= netdev_priv(dev
);
340 unsigned short buf
[32];
341 int last_fn
, last_ret
, i
, j
;
345 union wn3_config config
;
347 phys_addr
= (u16
*)dev
->dev_addr
;
349 DEBUG(0, "3c574_config(0x%p)\n", link
);
351 link
->io
.IOAddrLines
= 16;
352 for (i
= j
= 0; j
< 0x400; j
+= 0x20) {
353 link
->io
.BasePort1
= j
^ 0x300;
354 i
= pcmcia_request_io(link
, &link
->io
);
355 if (i
== CS_SUCCESS
) break;
357 if (i
!= CS_SUCCESS
) {
358 cs_error(link
, RequestIO
, i
);
361 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
362 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
364 dev
->irq
= link
->irq
.AssignedIRQ
;
365 dev
->base_addr
= link
->io
.BasePort1
;
367 ioaddr
= dev
->base_addr
;
369 /* The 3c574 normally uses an EEPROM for configuration info, including
370 the hardware address. The future products may include a modem chip
371 and put the address in the CIS. */
372 tuple
.Attributes
= 0;
373 tuple
.TupleData
= (cisdata_t
*)buf
;
374 tuple
.TupleDataMax
= 64;
375 tuple
.TupleOffset
= 0;
376 tuple
.DesiredTuple
= 0x88;
377 if (pcmcia_get_first_tuple(link
, &tuple
) == CS_SUCCESS
) {
378 pcmcia_get_tuple_data(link
, &tuple
);
379 for (i
= 0; i
< 3; i
++)
380 phys_addr
[i
] = htons(buf
[i
]);
383 for (i
= 0; i
< 3; i
++)
384 phys_addr
[i
] = htons(read_eeprom(ioaddr
, i
+ 10));
385 if (phys_addr
[0] == 0x6060) {
386 printk(KERN_NOTICE
"3c574_cs: IO port conflict at 0x%03lx"
387 "-0x%03lx\n", dev
->base_addr
, dev
->base_addr
+15);
391 if (link
->prod_id
[1])
392 cardname
= link
->prod_id
[1];
394 cardname
= "3Com 3c574";
398 outw(2<<11, ioaddr
+ RunnerRdCtrl
);
399 mcr
= inb(ioaddr
+ 2);
400 outw(0<<11, ioaddr
+ RunnerRdCtrl
);
401 printk(KERN_INFO
" ASIC rev %d,", mcr
>>3);
403 config
.i
= inl(ioaddr
+ Wn3_Config
);
404 lp
->default_media
= config
.u
.xcvr
;
405 lp
->autoselect
= config
.u
.autoselect
;
408 init_timer(&lp
->media
);
413 /* Roadrunner only: Turn on the MII transceiver */
414 outw(0x8040, ioaddr
+ Wn3_Options
);
416 outw(0xc040, ioaddr
+ Wn3_Options
);
417 tc574_wait_for_completion(dev
, TxReset
);
418 tc574_wait_for_completion(dev
, RxReset
);
420 outw(0x8040, ioaddr
+ Wn3_Options
);
423 for (phy
= 1; phy
<= 32; phy
++) {
425 mdio_sync(ioaddr
, 32);
426 mii_status
= mdio_read(ioaddr
, phy
& 0x1f, 1);
427 if (mii_status
!= 0xffff) {
428 lp
->phys
= phy
& 0x1f;
429 DEBUG(0, " MII transceiver at index %d, status %x.\n",
431 if ((mii_status
& 0x0040) == 0)
432 mii_preamble_required
= 1;
437 printk(KERN_NOTICE
" No MII transceivers found!\n");
440 i
= mdio_read(ioaddr
, lp
->phys
, 16) | 0x40;
441 mdio_write(ioaddr
, lp
->phys
, 16, i
);
442 lp
->advertising
= mdio_read(ioaddr
, lp
->phys
, 4);
444 /* Only advertise the FD media types. */
445 lp
->advertising
&= ~0x02a0;
446 mdio_write(ioaddr
, lp
->phys
, 4, lp
->advertising
);
450 link
->dev_node
= &lp
->node
;
451 SET_NETDEV_DEV(dev
, &handle_to_dev(link
));
453 if (register_netdev(dev
) != 0) {
454 printk(KERN_NOTICE
"3c574_cs: register_netdev() failed\n");
455 link
->dev_node
= NULL
;
459 strcpy(lp
->node
.dev_name
, dev
->name
);
461 printk(KERN_INFO
"%s: %s at io %#3lx, irq %d, hw_addr ",
462 dev
->name
, cardname
, dev
->base_addr
, dev
->irq
);
463 for (i
= 0; i
< 6; i
++)
464 printk("%02X%s", dev
->dev_addr
[i
], ((i
<5) ? ":" : ".\n"));
465 printk(" %dK FIFO split %s Rx:Tx, %sMII interface.\n",
466 8 << config
.u
.ram_size
, ram_split
[config
.u
.ram_split
],
467 config
.u
.autoselect
? "autoselect " : "");
472 cs_error(link
, last_fn
, last_ret
);
480 After a card is removed, tc574_release() will unregister the net
481 device, and release the PCMCIA configuration. If the device is
482 still open, this will be postponed until it is closed.
485 static void tc574_release(struct pcmcia_device
*link
)
487 pcmcia_disable_device(link
);
490 static int tc574_suspend(struct pcmcia_device
*link
)
492 struct net_device
*dev
= link
->priv
;
495 netif_device_detach(dev
);
500 static int tc574_resume(struct pcmcia_device
*link
)
502 struct net_device
*dev
= link
->priv
;
506 netif_device_attach(dev
);
512 static void dump_status(struct net_device
*dev
)
514 kio_addr_t ioaddr
= dev
->base_addr
;
516 printk(KERN_INFO
" irq status %04x, rx status %04x, tx status "
517 "%02x, tx free %04x\n", inw(ioaddr
+EL3_STATUS
),
518 inw(ioaddr
+RxStatus
), inb(ioaddr
+TxStatus
),
521 printk(KERN_INFO
" diagnostics: fifo %04x net %04x ethernet %04x"
522 " media %04x\n", inw(ioaddr
+0x04), inw(ioaddr
+0x06),
523 inw(ioaddr
+0x08), inw(ioaddr
+0x0a));
528 Use this for commands that may take time to finish
530 static void tc574_wait_for_completion(struct net_device
*dev
, int cmd
)
533 outw(cmd
, dev
->base_addr
+ EL3_CMD
);
535 if (!(inw(dev
->base_addr
+ EL3_STATUS
) & 0x1000)) break;
537 printk(KERN_NOTICE
"%s: command 0x%04x did not complete!\n", dev
->name
, cmd
);
540 /* Read a word from the EEPROM using the regular EEPROM access register.
541 Assume that we are in register window zero.
543 static unsigned short read_eeprom(kio_addr_t ioaddr
, int index
)
546 outw(EEPROM_Read
+ index
, ioaddr
+ Wn0EepromCmd
);
547 /* Pause for at least 162 usec for the read to take place. */
548 for (timer
= 1620; timer
>= 0; timer
--) {
549 if ((inw(ioaddr
+ Wn0EepromCmd
) & 0x8000) == 0)
552 return inw(ioaddr
+ Wn0EepromData
);
555 /* MII transceiver control section.
556 Read and write the MII registers using software-generated serial
557 MDIO protocol. See the MII specifications or DP83840A data sheet
559 The maxium data clock rate is 2.5 Mhz. The timing is easily met by the
560 slow PC card interface. */
562 #define MDIO_SHIFT_CLK 0x01
563 #define MDIO_DIR_WRITE 0x04
564 #define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
565 #define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
566 #define MDIO_DATA_READ 0x02
567 #define MDIO_ENB_IN 0x00
569 /* Generate the preamble required for initial synchronization and
570 a few older transceivers. */
571 static void mdio_sync(kio_addr_t ioaddr
, int bits
)
573 kio_addr_t mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
575 /* Establish sync by sending at least 32 logic ones. */
576 while (-- bits
>= 0) {
577 outw(MDIO_DATA_WRITE1
, mdio_addr
);
578 outw(MDIO_DATA_WRITE1
| MDIO_SHIFT_CLK
, mdio_addr
);
582 static int mdio_read(kio_addr_t ioaddr
, int phy_id
, int location
)
585 int read_cmd
= (0xf6 << 10) | (phy_id
<< 5) | location
;
586 unsigned int retval
= 0;
587 kio_addr_t mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
589 if (mii_preamble_required
)
590 mdio_sync(ioaddr
, 32);
592 /* Shift the read command bits out. */
593 for (i
= 14; i
>= 0; i
--) {
594 int dataval
= (read_cmd
&(1<<i
)) ? MDIO_DATA_WRITE1
: MDIO_DATA_WRITE0
;
595 outw(dataval
, mdio_addr
);
596 outw(dataval
| MDIO_SHIFT_CLK
, mdio_addr
);
598 /* Read the two transition, 16 data, and wire-idle bits. */
599 for (i
= 19; i
> 0; i
--) {
600 outw(MDIO_ENB_IN
, mdio_addr
);
601 retval
= (retval
<< 1) | ((inw(mdio_addr
) & MDIO_DATA_READ
) ? 1 : 0);
602 outw(MDIO_ENB_IN
| MDIO_SHIFT_CLK
, mdio_addr
);
604 return (retval
>>1) & 0xffff;
607 static void mdio_write(kio_addr_t ioaddr
, int phy_id
, int location
, int value
)
609 int write_cmd
= 0x50020000 | (phy_id
<< 23) | (location
<< 18) | value
;
610 kio_addr_t mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
613 if (mii_preamble_required
)
614 mdio_sync(ioaddr
, 32);
616 /* Shift the command bits out. */
617 for (i
= 31; i
>= 0; i
--) {
618 int dataval
= (write_cmd
&(1<<i
)) ? MDIO_DATA_WRITE1
: MDIO_DATA_WRITE0
;
619 outw(dataval
, mdio_addr
);
620 outw(dataval
| MDIO_SHIFT_CLK
, mdio_addr
);
622 /* Leave the interface idle. */
623 for (i
= 1; i
>= 0; i
--) {
624 outw(MDIO_ENB_IN
, mdio_addr
);
625 outw(MDIO_ENB_IN
| MDIO_SHIFT_CLK
, mdio_addr
);
631 /* Reset and restore all of the 3c574 registers. */
632 static void tc574_reset(struct net_device
*dev
)
634 struct el3_private
*lp
= netdev_priv(dev
);
636 kio_addr_t ioaddr
= dev
->base_addr
;
639 tc574_wait_for_completion(dev
, TotalReset
|0x10);
641 spin_lock_irqsave(&lp
->window_lock
, flags
);
642 /* Clear any transactions in progress. */
643 outw(0, ioaddr
+ RunnerWrCtrl
);
644 outw(0, ioaddr
+ RunnerRdCtrl
);
646 /* Set the station address and mask. */
648 for (i
= 0; i
< 6; i
++)
649 outb(dev
->dev_addr
[i
], ioaddr
+ i
);
653 /* Reset config options */
655 outb((dev
->mtu
> 1500 ? 0x40 : 0), ioaddr
+ Wn3_MAC_Ctrl
);
656 outl((lp
->autoselect
? 0x01000000 : 0) | 0x0062001b,
657 ioaddr
+ Wn3_Config
);
658 /* Roadrunner only: Turn on the MII transceiver. */
659 outw(0x8040, ioaddr
+ Wn3_Options
);
661 outw(0xc040, ioaddr
+ Wn3_Options
);
663 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
665 tc574_wait_for_completion(dev
, TxReset
);
666 tc574_wait_for_completion(dev
, RxReset
);
668 spin_lock_irqsave(&lp
->window_lock
, flags
);
670 outw(0x8040, ioaddr
+ Wn3_Options
);
672 /* Switch to the stats window, and clear all stats by reading. */
673 outw(StatsDisable
, ioaddr
+ EL3_CMD
);
675 for (i
= 0; i
< 10; i
++)
683 /* .. enable any extra statistics bits.. */
684 outw(0x0040, ioaddr
+ Wn4_NetDiag
);
687 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
689 /* .. re-sync MII and re-fill what NWay is advertising. */
690 mdio_sync(ioaddr
, 32);
691 mdio_write(ioaddr
, lp
->phys
, 4, lp
->advertising
);
692 if (!auto_polarity
) {
693 /* works for TDK 78Q2120 series MII's */
694 int i
= mdio_read(ioaddr
, lp
->phys
, 16) | 0x20;
695 mdio_write(ioaddr
, lp
->phys
, 16, i
);
698 spin_lock_irqsave(&lp
->window_lock
, flags
);
699 /* Switch to register set 1 for normal use, just for TxFree. */
701 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
702 outw(StatsEnable
, ioaddr
+ EL3_CMD
); /* Turn on statistics. */
703 outw(RxEnable
, ioaddr
+ EL3_CMD
); /* Enable the receiver. */
704 outw(TxEnable
, ioaddr
+ EL3_CMD
); /* Enable transmitter. */
705 /* Allow status bits to be seen. */
706 outw(SetStatusEnb
| 0xff, ioaddr
+ EL3_CMD
);
707 /* Ack all pending events, and set active indicator mask. */
708 outw(AckIntr
| IntLatch
| TxAvailable
| RxEarly
| IntReq
,
710 outw(SetIntrEnb
| IntLatch
| TxAvailable
| RxComplete
| StatsFull
711 | AdapterFailure
| RxEarly
, ioaddr
+ EL3_CMD
);
714 static int el3_open(struct net_device
*dev
)
716 struct el3_private
*lp
= netdev_priv(dev
);
717 struct pcmcia_device
*link
= lp
->p_dev
;
719 if (!pcmcia_dev_present(link
))
723 netif_start_queue(dev
);
726 lp
->media
.function
= &media_check
;
727 lp
->media
.data
= (unsigned long) dev
;
728 lp
->media
.expires
= jiffies
+ HZ
;
729 add_timer(&lp
->media
);
731 DEBUG(2, "%s: opened, status %4.4x.\n",
732 dev
->name
, inw(dev
->base_addr
+ EL3_STATUS
));
737 static void el3_tx_timeout(struct net_device
*dev
)
739 struct el3_private
*lp
= netdev_priv(dev
);
740 kio_addr_t ioaddr
= dev
->base_addr
;
742 printk(KERN_NOTICE
"%s: Transmit timed out!\n", dev
->name
);
744 lp
->stats
.tx_errors
++;
745 dev
->trans_start
= jiffies
;
746 /* Issue TX_RESET and TX_START commands. */
747 tc574_wait_for_completion(dev
, TxReset
);
748 outw(TxEnable
, ioaddr
+ EL3_CMD
);
749 netif_wake_queue(dev
);
752 static void pop_tx_status(struct net_device
*dev
)
754 struct el3_private
*lp
= netdev_priv(dev
);
755 kio_addr_t ioaddr
= dev
->base_addr
;
758 /* Clear the Tx status stack. */
759 for (i
= 32; i
> 0; i
--) {
760 u_char tx_status
= inb(ioaddr
+ TxStatus
);
761 if (!(tx_status
& 0x84))
763 /* reset transmitter on jabber error or underrun */
764 if (tx_status
& 0x30)
765 tc574_wait_for_completion(dev
, TxReset
);
766 if (tx_status
& 0x38) {
767 DEBUG(1, "%s: transmit error: status 0x%02x\n",
768 dev
->name
, tx_status
);
769 outw(TxEnable
, ioaddr
+ EL3_CMD
);
770 lp
->stats
.tx_aborted_errors
++;
772 outb(0x00, ioaddr
+ TxStatus
); /* Pop the status stack. */
776 static int el3_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
778 kio_addr_t ioaddr
= dev
->base_addr
;
779 struct el3_private
*lp
= netdev_priv(dev
);
782 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
783 "status %4.4x.\n", dev
->name
, (long)skb
->len
,
784 inw(ioaddr
+ EL3_STATUS
));
786 spin_lock_irqsave(&lp
->window_lock
, flags
);
787 outw(skb
->len
, ioaddr
+ TX_FIFO
);
788 outw(0, ioaddr
+ TX_FIFO
);
789 outsl(ioaddr
+ TX_FIFO
, skb
->data
, (skb
->len
+3)>>2);
791 dev
->trans_start
= jiffies
;
793 /* TxFree appears only in Window 1, not offset 0x1c. */
794 if (inw(ioaddr
+ TxFree
) <= 1536) {
795 netif_stop_queue(dev
);
796 /* Interrupt us when the FIFO has room for max-sized packet.
797 The threshold is in units of dwords. */
798 outw(SetTxThreshold
+ (1536>>2), ioaddr
+ EL3_CMD
);
802 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
807 /* The EL3 interrupt handler. */
808 static irqreturn_t
el3_interrupt(int irq
, void *dev_id
)
810 struct net_device
*dev
= (struct net_device
*) dev_id
;
811 struct el3_private
*lp
= netdev_priv(dev
);
814 int work_budget
= max_interrupt_work
;
817 if (!netif_device_present(dev
))
819 ioaddr
= dev
->base_addr
;
821 DEBUG(3, "%s: interrupt, status %4.4x.\n",
822 dev
->name
, inw(ioaddr
+ EL3_STATUS
));
824 spin_lock(&lp
->window_lock
);
826 while ((status
= inw(ioaddr
+ EL3_STATUS
)) &
827 (IntLatch
| RxComplete
| RxEarly
| StatsFull
)) {
828 if (!netif_device_present(dev
) ||
829 ((status
& 0xe000) != 0x2000)) {
830 DEBUG(1, "%s: Interrupt from dead card\n", dev
->name
);
836 if (status
& RxComplete
)
837 work_budget
= el3_rx(dev
, work_budget
);
839 if (status
& TxAvailable
) {
840 DEBUG(3, " TX room bit was handled.\n");
841 /* There's room in the FIFO for a full-sized packet. */
842 outw(AckIntr
| TxAvailable
, ioaddr
+ EL3_CMD
);
843 netif_wake_queue(dev
);
846 if (status
& TxComplete
)
849 if (status
& (AdapterFailure
| RxEarly
| StatsFull
)) {
850 /* Handle all uncommon interrupts. */
851 if (status
& StatsFull
)
853 if (status
& RxEarly
) {
854 work_budget
= el3_rx(dev
, work_budget
);
855 outw(AckIntr
| RxEarly
, ioaddr
+ EL3_CMD
);
857 if (status
& AdapterFailure
) {
860 fifo_diag
= inw(ioaddr
+ Wn4_FIFODiag
);
862 printk(KERN_NOTICE
"%s: adapter failure, FIFO diagnostic"
863 " register %04x.\n", dev
->name
, fifo_diag
);
864 if (fifo_diag
& 0x0400) {
866 tc574_wait_for_completion(dev
, TxReset
);
867 outw(TxEnable
, ioaddr
+ EL3_CMD
);
869 if (fifo_diag
& 0x2000) {
871 tc574_wait_for_completion(dev
, RxReset
);
873 outw(RxEnable
, ioaddr
+ EL3_CMD
);
875 outw(AckIntr
| AdapterFailure
, ioaddr
+ EL3_CMD
);
879 if (--work_budget
< 0) {
880 DEBUG(0, "%s: Too much work in interrupt, "
881 "status %4.4x.\n", dev
->name
, status
);
882 /* Clear all interrupts */
883 outw(AckIntr
| 0xFF, ioaddr
+ EL3_CMD
);
886 /* Acknowledge the IRQ. */
887 outw(AckIntr
| IntReq
| IntLatch
, ioaddr
+ EL3_CMD
);
890 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
891 dev
->name
, inw(ioaddr
+ EL3_STATUS
));
893 spin_unlock(&lp
->window_lock
);
894 return IRQ_RETVAL(handled
);
898 This timer serves two purposes: to check for missed interrupts
899 (and as a last resort, poll the NIC for events), and to monitor
900 the MII, reporting changes in cable status.
902 static void media_check(unsigned long arg
)
904 struct net_device
*dev
= (struct net_device
*) arg
;
905 struct el3_private
*lp
= netdev_priv(dev
);
906 kio_addr_t ioaddr
= dev
->base_addr
;
908 unsigned short /* cable, */ media
, partner
;
910 if (!netif_device_present(dev
))
913 /* Check for pending interrupt with expired latency timer: with
914 this, we can limp along even if the interrupt is blocked */
915 if ((inw(ioaddr
+ EL3_STATUS
) & IntLatch
) && (inb(ioaddr
+ Timer
) == 0xff)) {
917 printk(KERN_INFO
"%s: interrupt(s) dropped!\n", dev
->name
);
918 el3_interrupt(dev
->irq
, lp
);
923 lp
->media
.expires
= jiffies
+ 2*HZ
/100;
924 add_timer(&lp
->media
);
928 spin_lock_irqsave(&lp
->window_lock
, flags
);
930 media
= mdio_read(ioaddr
, lp
->phys
, 1);
931 partner
= mdio_read(ioaddr
, lp
->phys
, 5);
934 if (media
!= lp
->media_status
) {
935 if ((media
^ lp
->media_status
) & 0x0004)
936 printk(KERN_INFO
"%s: %s link beat\n", dev
->name
,
937 (lp
->media_status
& 0x0004) ? "lost" : "found");
938 if ((media
^ lp
->media_status
) & 0x0020) {
940 if (lp
->media_status
& 0x0020) {
941 printk(KERN_INFO
"%s: autonegotiation restarted\n",
943 } else if (partner
) {
944 partner
&= lp
->advertising
;
945 lp
->partner
= partner
;
946 printk(KERN_INFO
"%s: autonegotiation complete: "
947 "%sbaseT-%cD selected\n", dev
->name
,
948 ((partner
& 0x0180) ? "100" : "10"),
949 ((partner
& 0x0140) ? 'F' : 'H'));
951 printk(KERN_INFO
"%s: link partner did not autonegotiate\n",
956 outb((partner
& 0x0140 ? 0x20 : 0) |
957 (dev
->mtu
> 1500 ? 0x40 : 0), ioaddr
+ Wn3_MAC_Ctrl
);
962 printk(KERN_INFO
"%s: remote fault detected\n",
965 printk(KERN_INFO
"%s: jabber detected\n", dev
->name
);
966 lp
->media_status
= media
;
968 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
971 lp
->media
.expires
= jiffies
+ HZ
;
972 add_timer(&lp
->media
);
975 static struct net_device_stats
*el3_get_stats(struct net_device
*dev
)
977 struct el3_private
*lp
= netdev_priv(dev
);
979 if (netif_device_present(dev
)) {
981 spin_lock_irqsave(&lp
->window_lock
, flags
);
983 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
988 /* Update statistics.
989 Suprisingly this need not be run single-threaded, but it effectively is.
990 The counters clear when read, so the adds must merely be atomic.
992 static void update_stats(struct net_device
*dev
)
994 struct el3_private
*lp
= netdev_priv(dev
);
995 kio_addr_t ioaddr
= dev
->base_addr
;
998 DEBUG(2, "%s: updating the statistics.\n", dev
->name
);
1000 if (inw(ioaddr
+EL3_STATUS
) == 0xffff) /* No card. */
1003 /* Unlike the 3c509 we need not turn off stats updates while reading. */
1004 /* Switch to the stats window, and read everything. */
1006 lp
->stats
.tx_carrier_errors
+= inb(ioaddr
+ 0);
1007 lp
->stats
.tx_heartbeat_errors
+= inb(ioaddr
+ 1);
1008 /* Multiple collisions. */ inb(ioaddr
+ 2);
1009 lp
->stats
.collisions
+= inb(ioaddr
+ 3);
1010 lp
->stats
.tx_window_errors
+= inb(ioaddr
+ 4);
1011 lp
->stats
.rx_fifo_errors
+= inb(ioaddr
+ 5);
1012 lp
->stats
.tx_packets
+= inb(ioaddr
+ 6);
1013 up
= inb(ioaddr
+ 9);
1014 lp
->stats
.tx_packets
+= (up
&0x30) << 4;
1015 /* Rx packets */ inb(ioaddr
+ 7);
1016 /* Tx deferrals */ inb(ioaddr
+ 8);
1017 rx
= inw(ioaddr
+ 10);
1018 tx
= inw(ioaddr
+ 12);
1021 /* BadSSD */ inb(ioaddr
+ 12);
1022 up
= inb(ioaddr
+ 13);
1024 lp
->stats
.tx_bytes
+= tx
+ ((up
& 0xf0) << 12);
1029 static int el3_rx(struct net_device
*dev
, int worklimit
)
1031 struct el3_private
*lp
= netdev_priv(dev
);
1032 kio_addr_t ioaddr
= dev
->base_addr
;
1035 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
1036 dev
->name
, inw(ioaddr
+EL3_STATUS
), inw(ioaddr
+RxStatus
));
1037 while (!((rx_status
= inw(ioaddr
+ RxStatus
)) & 0x8000) &&
1038 (--worklimit
>= 0)) {
1039 if (rx_status
& 0x4000) { /* Error, update stats. */
1040 short error
= rx_status
& 0x3800;
1041 lp
->stats
.rx_errors
++;
1043 case 0x0000: lp
->stats
.rx_over_errors
++; break;
1044 case 0x0800: lp
->stats
.rx_length_errors
++; break;
1045 case 0x1000: lp
->stats
.rx_frame_errors
++; break;
1046 case 0x1800: lp
->stats
.rx_length_errors
++; break;
1047 case 0x2000: lp
->stats
.rx_frame_errors
++; break;
1048 case 0x2800: lp
->stats
.rx_crc_errors
++; break;
1051 short pkt_len
= rx_status
& 0x7ff;
1052 struct sk_buff
*skb
;
1054 skb
= dev_alloc_skb(pkt_len
+5);
1056 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
1057 pkt_len
, rx_status
);
1060 skb_reserve(skb
, 2);
1061 insl(ioaddr
+RX_FIFO
, skb_put(skb
, pkt_len
),
1063 skb
->protocol
= eth_type_trans(skb
, dev
);
1065 dev
->last_rx
= jiffies
;
1066 lp
->stats
.rx_packets
++;
1067 lp
->stats
.rx_bytes
+= pkt_len
;
1069 DEBUG(1, "%s: couldn't allocate a sk_buff of"
1070 " size %d.\n", dev
->name
, pkt_len
);
1071 lp
->stats
.rx_dropped
++;
1074 tc574_wait_for_completion(dev
, RxDiscard
);
1080 static void netdev_get_drvinfo(struct net_device
*dev
,
1081 struct ethtool_drvinfo
*info
)
1083 strcpy(info
->driver
, "3c574_cs");
1086 static const struct ethtool_ops netdev_ethtool_ops
= {
1087 .get_drvinfo
= netdev_get_drvinfo
,
1090 /* Provide ioctl() calls to examine the MII xcvr state. */
1091 static int el3_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1093 struct el3_private
*lp
= netdev_priv(dev
);
1094 kio_addr_t ioaddr
= dev
->base_addr
;
1095 u16
*data
= (u16
*)&rq
->ifr_ifru
;
1096 int phy
= lp
->phys
& 0x1f;
1098 DEBUG(2, "%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n",
1099 dev
->name
, rq
->ifr_ifrn
.ifrn_name
, cmd
,
1100 data
[0], data
[1], data
[2], data
[3]);
1103 case SIOCGMIIPHY
: /* Get the address of the PHY in use. */
1105 case SIOCGMIIREG
: /* Read the specified MII register. */
1108 unsigned long flags
;
1110 spin_lock_irqsave(&lp
->window_lock
, flags
);
1111 saved_window
= inw(ioaddr
+ EL3_CMD
) >> 13;
1113 data
[3] = mdio_read(ioaddr
, data
[0] & 0x1f, data
[1] & 0x1f);
1114 EL3WINDOW(saved_window
);
1115 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1118 case SIOCSMIIREG
: /* Write the specified MII register */
1121 unsigned long flags
;
1123 if (!capable(CAP_NET_ADMIN
))
1125 spin_lock_irqsave(&lp
->window_lock
, flags
);
1126 saved_window
= inw(ioaddr
+ EL3_CMD
) >> 13;
1128 mdio_write(ioaddr
, data
[0] & 0x1f, data
[1] & 0x1f, data
[2]);
1129 EL3WINDOW(saved_window
);
1130 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1138 /* The Odie chip has a 64 bin multicast filter, but the bit layout is not
1139 documented. Until it is we revert to receiving all multicast frames when
1140 any multicast reception is desired.
1141 Note: My other drivers emit a log message whenever promiscuous mode is
1142 entered to help detect password sniffers. This is less desirable on
1143 typical PC card machines, so we omit the message.
1146 static void set_rx_mode(struct net_device
*dev
)
1148 kio_addr_t ioaddr
= dev
->base_addr
;
1150 if (dev
->flags
& IFF_PROMISC
)
1151 outw(SetRxFilter
| RxStation
| RxMulticast
| RxBroadcast
| RxProm
,
1153 else if (dev
->mc_count
|| (dev
->flags
& IFF_ALLMULTI
))
1154 outw(SetRxFilter
|RxStation
|RxMulticast
|RxBroadcast
, ioaddr
+ EL3_CMD
);
1156 outw(SetRxFilter
| RxStation
| RxBroadcast
, ioaddr
+ EL3_CMD
);
1159 static int el3_close(struct net_device
*dev
)
1161 kio_addr_t ioaddr
= dev
->base_addr
;
1162 struct el3_private
*lp
= netdev_priv(dev
);
1163 struct pcmcia_device
*link
= lp
->p_dev
;
1165 DEBUG(2, "%s: shutting down ethercard.\n", dev
->name
);
1167 if (pcmcia_dev_present(link
)) {
1168 unsigned long flags
;
1170 /* Turn off statistics ASAP. We update lp->stats below. */
1171 outw(StatsDisable
, ioaddr
+ EL3_CMD
);
1173 /* Disable the receiver and transmitter. */
1174 outw(RxDisable
, ioaddr
+ EL3_CMD
);
1175 outw(TxDisable
, ioaddr
+ EL3_CMD
);
1177 /* Note: Switching to window 0 may disable the IRQ. */
1179 spin_lock_irqsave(&lp
->window_lock
, flags
);
1181 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1183 /* force interrupts off */
1184 outw(SetIntrEnb
| 0x0000, ioaddr
+ EL3_CMD
);
1188 netif_stop_queue(dev
);
1189 del_timer_sync(&lp
->media
);
1194 static struct pcmcia_device_id tc574_ids
[] = {
1195 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574),
1196 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "3CCFEM556.cis"),
1199 MODULE_DEVICE_TABLE(pcmcia
, tc574_ids
);
1201 static struct pcmcia_driver tc574_driver
= {
1202 .owner
= THIS_MODULE
,
1206 .probe
= tc574_probe
,
1207 .remove
= tc574_detach
,
1208 .id_table
= tc574_ids
,
1209 .suspend
= tc574_suspend
,
1210 .resume
= tc574_resume
,
1213 static int __init
init_tc574(void)
1215 return pcmcia_register_driver(&tc574_driver
);
1218 static void __exit
exit_tc574(void)
1220 pcmcia_unregister_driver(&tc574_driver
);
1223 module_init(init_tc574
);
1224 module_exit(exit_tc574
);