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>
88 #include <linux/mii.h>
90 #include <pcmcia/cs_types.h>
91 #include <pcmcia/cs.h>
92 #include <pcmcia/cistpl.h>
93 #include <pcmcia/cisreg.h>
94 #include <pcmcia/ciscode.h>
95 #include <pcmcia/ds.h>
96 #include <pcmcia/mem_op.h>
98 #include <asm/uaccess.h>
100 #include <asm/system.h>
102 /*====================================================================*/
104 /* Module parameters */
106 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
107 MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver");
108 MODULE_LICENSE("GPL");
110 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
112 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
113 INT_MODULE_PARM(max_interrupt_work
, 32);
115 /* Force full duplex modes? */
116 INT_MODULE_PARM(full_duplex
, 0);
118 /* Autodetect link polarity reversal? */
119 INT_MODULE_PARM(auto_polarity
, 1);
122 /*====================================================================*/
124 /* Time in jiffies before concluding the transmitter is hung. */
125 #define TX_TIMEOUT ((800*HZ)/1000)
127 /* To minimize the size of the driver source and make the driver more
128 readable not all constants are symbolically defined.
129 You'll need the manual if you want to understand driver details anyway. */
130 /* Offsets from base I/O address. */
131 #define EL3_DATA 0x00
133 #define EL3_STATUS 0x0e
135 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
137 /* The top five bits written to EL3_CMD are a command, the lower
138 11 bits are the parameter, if applicable. */
140 TotalReset
= 0<<11, SelectWindow
= 1<<11, StartCoax
= 2<<11,
141 RxDisable
= 3<<11, RxEnable
= 4<<11, RxReset
= 5<<11, RxDiscard
= 8<<11,
142 TxEnable
= 9<<11, TxDisable
= 10<<11, TxReset
= 11<<11,
143 FakeIntr
= 12<<11, AckIntr
= 13<<11, SetIntrEnb
= 14<<11,
144 SetStatusEnb
= 15<<11, SetRxFilter
= 16<<11, SetRxThreshold
= 17<<11,
145 SetTxThreshold
= 18<<11, SetTxStart
= 19<<11, StatsEnable
= 21<<11,
146 StatsDisable
= 22<<11, StopCoax
= 23<<11,
150 IntLatch
= 0x0001, AdapterFailure
= 0x0002, TxComplete
= 0x0004,
151 TxAvailable
= 0x0008, RxComplete
= 0x0010, RxEarly
= 0x0020,
152 IntReq
= 0x0040, StatsFull
= 0x0080, CmdBusy
= 0x1000 };
154 /* The SetRxFilter command accepts the following classes: */
156 RxStation
= 1, RxMulticast
= 2, RxBroadcast
= 4, RxProm
= 8
160 Wn0EepromCmd
= 10, Wn0EepromData
= 12, /* EEPROM command/address, data. */
161 IntrStatus
=0x0E, /* Valid in all windows. */
163 /* These assumes the larger EEPROM. */
164 enum Win0_EEPROM_cmds
{
165 EEPROM_Read
= 0x200, EEPROM_WRITE
= 0x100, EEPROM_ERASE
= 0x300,
166 EEPROM_EWENB
= 0x30, /* Enable erasing/writing for 10 msec. */
167 EEPROM_EWDIS
= 0x00, /* Disable EWENB before 10 msec timeout. */
170 /* Register window 1 offsets, the window used in normal operation.
171 On the "Odie" this window is always mapped at offsets 0x10-0x1f.
172 Except for TxFree, which is overlapped by RunnerWrCtrl. */
174 TX_FIFO
= 0x10, RX_FIFO
= 0x10, RxErrors
= 0x14,
175 RxStatus
= 0x18, Timer
=0x1A, TxStatus
= 0x1B,
176 TxFree
= 0x0C, /* Remaining free bytes in Tx buffer. */
177 RunnerRdCtrl
= 0x16, RunnerWrCtrl
= 0x1c,
180 enum Window3
{ /* Window 3: MAC/config bits. */
181 Wn3_Config
=0, Wn3_MAC_Ctrl
=6, Wn3_Options
=8,
188 Ram_split_shift
= 16,
189 Ram_split
= 3 << Ram_split_shift
,
191 Xcvr
= 7 << Xcvr_shift
,
192 Autoselect
= 0x1000000,
195 enum Window4
{ /* Window 4: Xcvr/media bits. */
196 Wn4_FIFODiag
= 4, Wn4_NetDiag
= 6, Wn4_PhysicalMgmt
=8, Wn4_Media
= 10,
199 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
202 struct pcmcia_device
*p_dev
;
204 u16 advertising
, partner
; /* NWay media advertisement */
205 unsigned char phys
; /* MII device address */
206 unsigned int autoselect
:1, default_media
:3; /* Read from the EEPROM/Wn3_Config. */
207 /* for transceiver monitoring */
208 struct timer_list media
;
209 unsigned short media_status
;
210 unsigned short fast_poll
;
211 unsigned long last_irq
;
212 spinlock_t window_lock
; /* Guards the Window selection */
215 /* Set iff a MII transceiver on any interface requires mdio preamble.
216 This only set with the original DP83840 on older 3c905 boards, so the extra
217 code size of a per-interface flag is not worthwhile. */
218 static char mii_preamble_required
= 0;
220 /* Index of functions. */
222 static int tc574_config(struct pcmcia_device
*link
);
223 static void tc574_release(struct pcmcia_device
*link
);
225 static void mdio_sync(unsigned int ioaddr
, int bits
);
226 static int mdio_read(unsigned int ioaddr
, int phy_id
, int location
);
227 static void mdio_write(unsigned int ioaddr
, int phy_id
, int location
,
229 static unsigned short read_eeprom(unsigned int ioaddr
, int index
);
230 static void tc574_wait_for_completion(struct net_device
*dev
, int cmd
);
232 static void tc574_reset(struct net_device
*dev
);
233 static void media_check(unsigned long arg
);
234 static int el3_open(struct net_device
*dev
);
235 static netdev_tx_t
el3_start_xmit(struct sk_buff
*skb
,
236 struct net_device
*dev
);
237 static irqreturn_t
el3_interrupt(int irq
, void *dev_id
);
238 static void update_stats(struct net_device
*dev
);
239 static struct net_device_stats
*el3_get_stats(struct net_device
*dev
);
240 static int el3_rx(struct net_device
*dev
, int worklimit
);
241 static int el3_close(struct net_device
*dev
);
242 static void el3_tx_timeout(struct net_device
*dev
);
243 static int el3_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
244 static const struct ethtool_ops netdev_ethtool_ops
;
245 static void set_rx_mode(struct net_device
*dev
);
246 static void set_multicast_list(struct net_device
*dev
);
248 static void tc574_detach(struct pcmcia_device
*p_dev
);
251 tc574_attach() creates an "instance" of the driver, allocating
252 local data structures for one device. The device is registered
255 static const struct net_device_ops el3_netdev_ops
= {
256 .ndo_open
= el3_open
,
257 .ndo_stop
= el3_close
,
258 .ndo_start_xmit
= el3_start_xmit
,
259 .ndo_tx_timeout
= el3_tx_timeout
,
260 .ndo_get_stats
= el3_get_stats
,
261 .ndo_do_ioctl
= el3_ioctl
,
262 .ndo_set_multicast_list
= set_multicast_list
,
263 .ndo_change_mtu
= eth_change_mtu
,
264 .ndo_set_mac_address
= eth_mac_addr
,
265 .ndo_validate_addr
= eth_validate_addr
,
268 static int tc574_probe(struct pcmcia_device
*link
)
270 struct el3_private
*lp
;
271 struct net_device
*dev
;
273 dev_dbg(&link
->dev
, "3c574_attach()\n");
275 /* Create the PC card device object. */
276 dev
= alloc_etherdev(sizeof(struct el3_private
));
279 lp
= netdev_priv(dev
);
283 spin_lock_init(&lp
->window_lock
);
284 link
->io
.NumPorts1
= 32;
285 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
286 link
->irq
.Attributes
= IRQ_TYPE_DYNAMIC_SHARING
;
287 link
->irq
.Handler
= &el3_interrupt
;
288 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
289 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
290 link
->conf
.ConfigIndex
= 1;
292 dev
->netdev_ops
= &el3_netdev_ops
;
293 SET_ETHTOOL_OPS(dev
, &netdev_ethtool_ops
);
294 dev
->watchdog_timeo
= TX_TIMEOUT
;
296 return tc574_config(link
);
301 This deletes a driver "instance". The device is de-registered
302 with Card Services. If it has been released, all local data
303 structures are freed. Otherwise, the structures will be freed
304 when the device is released.
308 static void tc574_detach(struct pcmcia_device
*link
)
310 struct net_device
*dev
= link
->priv
;
312 dev_dbg(&link
->dev
, "3c574_detach()\n");
315 unregister_netdev(dev
);
323 tc574_config() is scheduled to run after a CARD_INSERTION event
324 is received, to configure the PCMCIA socket, and to make the
325 ethernet device available to the system.
328 static const char *ram_split
[] = {"5:3", "3:1", "1:1", "3:5"};
330 static int tc574_config(struct pcmcia_device
*link
)
332 struct net_device
*dev
= link
->priv
;
333 struct el3_private
*lp
= netdev_priv(dev
);
342 phys_addr
= (__be16
*)dev
->dev_addr
;
344 dev_dbg(&link
->dev
, "3c574_config()\n");
346 link
->io
.IOAddrLines
= 16;
347 for (i
= j
= 0; j
< 0x400; j
+= 0x20) {
348 link
->io
.BasePort1
= j
^ 0x300;
349 i
= pcmcia_request_io(link
, &link
->io
);
356 ret
= pcmcia_request_irq(link
, &link
->irq
);
360 ret
= 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. */
373 len
= pcmcia_get_tuple(link
, 0x88, &buf
);
374 if (buf
&& len
>= 6) {
375 for (i
= 0; i
< 3; i
++)
376 phys_addr
[i
] = htons(le16_to_cpu(buf
[i
* 2]));
379 kfree(buf
); /* 0 < len < 6 */
381 for (i
= 0; i
< 3; i
++)
382 phys_addr
[i
] = htons(read_eeprom(ioaddr
, i
+ 10));
383 if (phys_addr
[0] == htons(0x6060)) {
384 printk(KERN_NOTICE
"3c574_cs: IO port conflict at 0x%03lx"
385 "-0x%03lx\n", dev
->base_addr
, dev
->base_addr
+15);
389 if (link
->prod_id
[1])
390 cardname
= link
->prod_id
[1];
392 cardname
= "3Com 3c574";
396 outw(2<<11, ioaddr
+ RunnerRdCtrl
);
397 mcr
= inb(ioaddr
+ 2);
398 outw(0<<11, ioaddr
+ RunnerRdCtrl
);
399 printk(KERN_INFO
" ASIC rev %d,", mcr
>>3);
401 config
= inl(ioaddr
+ Wn3_Config
);
402 lp
->default_media
= (config
& Xcvr
) >> Xcvr_shift
;
403 lp
->autoselect
= config
& Autoselect
? 1 : 0;
406 init_timer(&lp
->media
);
411 /* Roadrunner only: Turn on the MII transceiver */
412 outw(0x8040, ioaddr
+ Wn3_Options
);
414 outw(0xc040, ioaddr
+ Wn3_Options
);
415 tc574_wait_for_completion(dev
, TxReset
);
416 tc574_wait_for_completion(dev
, RxReset
);
418 outw(0x8040, ioaddr
+ Wn3_Options
);
421 for (phy
= 1; phy
<= 32; phy
++) {
423 mdio_sync(ioaddr
, 32);
424 mii_status
= mdio_read(ioaddr
, phy
& 0x1f, 1);
425 if (mii_status
!= 0xffff) {
426 lp
->phys
= phy
& 0x1f;
427 dev_dbg(&link
->dev
, " MII transceiver at "
428 "index %d, status %x.\n",
430 if ((mii_status
& 0x0040) == 0)
431 mii_preamble_required
= 1;
436 printk(KERN_NOTICE
" No MII transceivers found!\n");
439 i
= mdio_read(ioaddr
, lp
->phys
, 16) | 0x40;
440 mdio_write(ioaddr
, lp
->phys
, 16, i
);
441 lp
->advertising
= mdio_read(ioaddr
, lp
->phys
, 4);
443 /* Only advertise the FD media types. */
444 lp
->advertising
&= ~0x02a0;
445 mdio_write(ioaddr
, lp
->phys
, 4, lp
->advertising
);
449 link
->dev_node
= &lp
->node
;
450 SET_NETDEV_DEV(dev
, &link
->dev
);
452 if (register_netdev(dev
) != 0) {
453 printk(KERN_NOTICE
"3c574_cs: register_netdev() failed\n");
454 link
->dev_node
= NULL
;
458 strcpy(lp
->node
.dev_name
, dev
->name
);
460 printk(KERN_INFO
"%s: %s at io %#3lx, irq %d, "
462 dev
->name
, cardname
, dev
->base_addr
, dev
->irq
,
464 printk(" %dK FIFO split %s Rx:Tx, %sMII interface.\n",
465 8 << config
& Ram_size
,
466 ram_split
[(config
& Ram_split
) >> Ram_split_shift
],
467 config
& Autoselect
? "autoselect " : "");
478 After a card is removed, tc574_release() will unregister the net
479 device, and release the PCMCIA configuration. If the device is
480 still open, this will be postponed until it is closed.
483 static void tc574_release(struct pcmcia_device
*link
)
485 pcmcia_disable_device(link
);
488 static int tc574_suspend(struct pcmcia_device
*link
)
490 struct net_device
*dev
= link
->priv
;
493 netif_device_detach(dev
);
498 static int tc574_resume(struct pcmcia_device
*link
)
500 struct net_device
*dev
= link
->priv
;
504 netif_device_attach(dev
);
510 static void dump_status(struct net_device
*dev
)
512 unsigned int ioaddr
= dev
->base_addr
;
514 printk(KERN_INFO
" irq status %04x, rx status %04x, tx status "
515 "%02x, tx free %04x\n", inw(ioaddr
+EL3_STATUS
),
516 inw(ioaddr
+RxStatus
), inb(ioaddr
+TxStatus
),
519 printk(KERN_INFO
" diagnostics: fifo %04x net %04x ethernet %04x"
520 " media %04x\n", inw(ioaddr
+0x04), inw(ioaddr
+0x06),
521 inw(ioaddr
+0x08), inw(ioaddr
+0x0a));
526 Use this for commands that may take time to finish
528 static void tc574_wait_for_completion(struct net_device
*dev
, int cmd
)
531 outw(cmd
, dev
->base_addr
+ EL3_CMD
);
533 if (!(inw(dev
->base_addr
+ EL3_STATUS
) & 0x1000)) break;
535 printk(KERN_NOTICE
"%s: command 0x%04x did not complete!\n", dev
->name
, cmd
);
538 /* Read a word from the EEPROM using the regular EEPROM access register.
539 Assume that we are in register window zero.
541 static unsigned short read_eeprom(unsigned int ioaddr
, int index
)
544 outw(EEPROM_Read
+ index
, ioaddr
+ Wn0EepromCmd
);
545 /* Pause for at least 162 usec for the read to take place. */
546 for (timer
= 1620; timer
>= 0; timer
--) {
547 if ((inw(ioaddr
+ Wn0EepromCmd
) & 0x8000) == 0)
550 return inw(ioaddr
+ Wn0EepromData
);
553 /* MII transceiver control section.
554 Read and write the MII registers using software-generated serial
555 MDIO protocol. See the MII specifications or DP83840A data sheet
557 The maxium data clock rate is 2.5 Mhz. The timing is easily met by the
558 slow PC card interface. */
560 #define MDIO_SHIFT_CLK 0x01
561 #define MDIO_DIR_WRITE 0x04
562 #define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
563 #define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
564 #define MDIO_DATA_READ 0x02
565 #define MDIO_ENB_IN 0x00
567 /* Generate the preamble required for initial synchronization and
568 a few older transceivers. */
569 static void mdio_sync(unsigned int ioaddr
, int bits
)
571 unsigned int mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
573 /* Establish sync by sending at least 32 logic ones. */
574 while (-- bits
>= 0) {
575 outw(MDIO_DATA_WRITE1
, mdio_addr
);
576 outw(MDIO_DATA_WRITE1
| MDIO_SHIFT_CLK
, mdio_addr
);
580 static int mdio_read(unsigned int ioaddr
, int phy_id
, int location
)
583 int read_cmd
= (0xf6 << 10) | (phy_id
<< 5) | location
;
584 unsigned int retval
= 0;
585 unsigned int mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
587 if (mii_preamble_required
)
588 mdio_sync(ioaddr
, 32);
590 /* Shift the read command bits out. */
591 for (i
= 14; i
>= 0; i
--) {
592 int dataval
= (read_cmd
&(1<<i
)) ? MDIO_DATA_WRITE1
: MDIO_DATA_WRITE0
;
593 outw(dataval
, mdio_addr
);
594 outw(dataval
| MDIO_SHIFT_CLK
, mdio_addr
);
596 /* Read the two transition, 16 data, and wire-idle bits. */
597 for (i
= 19; i
> 0; i
--) {
598 outw(MDIO_ENB_IN
, mdio_addr
);
599 retval
= (retval
<< 1) | ((inw(mdio_addr
) & MDIO_DATA_READ
) ? 1 : 0);
600 outw(MDIO_ENB_IN
| MDIO_SHIFT_CLK
, mdio_addr
);
602 return (retval
>>1) & 0xffff;
605 static void mdio_write(unsigned int ioaddr
, int phy_id
, int location
, int value
)
607 int write_cmd
= 0x50020000 | (phy_id
<< 23) | (location
<< 18) | value
;
608 unsigned int mdio_addr
= ioaddr
+ Wn4_PhysicalMgmt
;
611 if (mii_preamble_required
)
612 mdio_sync(ioaddr
, 32);
614 /* Shift the command bits out. */
615 for (i
= 31; i
>= 0; i
--) {
616 int dataval
= (write_cmd
&(1<<i
)) ? MDIO_DATA_WRITE1
: MDIO_DATA_WRITE0
;
617 outw(dataval
, mdio_addr
);
618 outw(dataval
| MDIO_SHIFT_CLK
, mdio_addr
);
620 /* Leave the interface idle. */
621 for (i
= 1; i
>= 0; i
--) {
622 outw(MDIO_ENB_IN
, mdio_addr
);
623 outw(MDIO_ENB_IN
| MDIO_SHIFT_CLK
, mdio_addr
);
629 /* Reset and restore all of the 3c574 registers. */
630 static void tc574_reset(struct net_device
*dev
)
632 struct el3_private
*lp
= netdev_priv(dev
);
634 unsigned int ioaddr
= dev
->base_addr
;
637 tc574_wait_for_completion(dev
, TotalReset
|0x10);
639 spin_lock_irqsave(&lp
->window_lock
, flags
);
640 /* Clear any transactions in progress. */
641 outw(0, ioaddr
+ RunnerWrCtrl
);
642 outw(0, ioaddr
+ RunnerRdCtrl
);
644 /* Set the station address and mask. */
646 for (i
= 0; i
< 6; i
++)
647 outb(dev
->dev_addr
[i
], ioaddr
+ i
);
651 /* Reset config options */
653 outb((dev
->mtu
> 1500 ? 0x40 : 0), ioaddr
+ Wn3_MAC_Ctrl
);
654 outl((lp
->autoselect
? 0x01000000 : 0) | 0x0062001b,
655 ioaddr
+ Wn3_Config
);
656 /* Roadrunner only: Turn on the MII transceiver. */
657 outw(0x8040, ioaddr
+ Wn3_Options
);
659 outw(0xc040, ioaddr
+ Wn3_Options
);
661 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
663 tc574_wait_for_completion(dev
, TxReset
);
664 tc574_wait_for_completion(dev
, RxReset
);
666 spin_lock_irqsave(&lp
->window_lock
, flags
);
668 outw(0x8040, ioaddr
+ Wn3_Options
);
670 /* Switch to the stats window, and clear all stats by reading. */
671 outw(StatsDisable
, ioaddr
+ EL3_CMD
);
673 for (i
= 0; i
< 10; i
++)
681 /* .. enable any extra statistics bits.. */
682 outw(0x0040, ioaddr
+ Wn4_NetDiag
);
685 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
687 /* .. re-sync MII and re-fill what NWay is advertising. */
688 mdio_sync(ioaddr
, 32);
689 mdio_write(ioaddr
, lp
->phys
, 4, lp
->advertising
);
690 if (!auto_polarity
) {
691 /* works for TDK 78Q2120 series MII's */
692 i
= mdio_read(ioaddr
, lp
->phys
, 16) | 0x20;
693 mdio_write(ioaddr
, lp
->phys
, 16, i
);
696 spin_lock_irqsave(&lp
->window_lock
, flags
);
697 /* Switch to register set 1 for normal use, just for TxFree. */
699 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
700 outw(StatsEnable
, ioaddr
+ EL3_CMD
); /* Turn on statistics. */
701 outw(RxEnable
, ioaddr
+ EL3_CMD
); /* Enable the receiver. */
702 outw(TxEnable
, ioaddr
+ EL3_CMD
); /* Enable transmitter. */
703 /* Allow status bits to be seen. */
704 outw(SetStatusEnb
| 0xff, ioaddr
+ EL3_CMD
);
705 /* Ack all pending events, and set active indicator mask. */
706 outw(AckIntr
| IntLatch
| TxAvailable
| RxEarly
| IntReq
,
708 outw(SetIntrEnb
| IntLatch
| TxAvailable
| RxComplete
| StatsFull
709 | AdapterFailure
| RxEarly
, ioaddr
+ EL3_CMD
);
712 static int el3_open(struct net_device
*dev
)
714 struct el3_private
*lp
= netdev_priv(dev
);
715 struct pcmcia_device
*link
= lp
->p_dev
;
717 if (!pcmcia_dev_present(link
))
721 netif_start_queue(dev
);
724 lp
->media
.function
= &media_check
;
725 lp
->media
.data
= (unsigned long) dev
;
726 lp
->media
.expires
= jiffies
+ HZ
;
727 add_timer(&lp
->media
);
729 dev_dbg(&link
->dev
, "%s: opened, status %4.4x.\n",
730 dev
->name
, inw(dev
->base_addr
+ EL3_STATUS
));
735 static void el3_tx_timeout(struct net_device
*dev
)
737 unsigned int ioaddr
= dev
->base_addr
;
739 printk(KERN_NOTICE
"%s: Transmit timed out!\n", dev
->name
);
741 dev
->stats
.tx_errors
++;
742 dev
->trans_start
= jiffies
;
743 /* Issue TX_RESET and TX_START commands. */
744 tc574_wait_for_completion(dev
, TxReset
);
745 outw(TxEnable
, ioaddr
+ EL3_CMD
);
746 netif_wake_queue(dev
);
749 static void pop_tx_status(struct net_device
*dev
)
751 unsigned int ioaddr
= dev
->base_addr
;
754 /* Clear the Tx status stack. */
755 for (i
= 32; i
> 0; i
--) {
756 u_char tx_status
= inb(ioaddr
+ TxStatus
);
757 if (!(tx_status
& 0x84))
759 /* reset transmitter on jabber error or underrun */
760 if (tx_status
& 0x30)
761 tc574_wait_for_completion(dev
, TxReset
);
762 if (tx_status
& 0x38) {
763 pr_debug("%s: transmit error: status 0x%02x\n",
764 dev
->name
, tx_status
);
765 outw(TxEnable
, ioaddr
+ EL3_CMD
);
766 dev
->stats
.tx_aborted_errors
++;
768 outb(0x00, ioaddr
+ TxStatus
); /* Pop the status stack. */
772 static netdev_tx_t
el3_start_xmit(struct sk_buff
*skb
,
773 struct net_device
*dev
)
775 unsigned int ioaddr
= dev
->base_addr
;
776 struct el3_private
*lp
= netdev_priv(dev
);
779 pr_debug("%s: el3_start_xmit(length = %ld) called, "
780 "status %4.4x.\n", dev
->name
, (long)skb
->len
,
781 inw(ioaddr
+ EL3_STATUS
));
783 spin_lock_irqsave(&lp
->window_lock
, flags
);
784 outw(skb
->len
, ioaddr
+ TX_FIFO
);
785 outw(0, ioaddr
+ TX_FIFO
);
786 outsl(ioaddr
+ TX_FIFO
, skb
->data
, (skb
->len
+3)>>2);
788 dev
->trans_start
= jiffies
;
790 /* TxFree appears only in Window 1, not offset 0x1c. */
791 if (inw(ioaddr
+ TxFree
) <= 1536) {
792 netif_stop_queue(dev
);
793 /* Interrupt us when the FIFO has room for max-sized packet.
794 The threshold is in units of dwords. */
795 outw(SetTxThreshold
+ (1536>>2), ioaddr
+ EL3_CMD
);
799 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
804 /* The EL3 interrupt handler. */
805 static irqreturn_t
el3_interrupt(int irq
, void *dev_id
)
807 struct net_device
*dev
= (struct net_device
*) dev_id
;
808 struct el3_private
*lp
= netdev_priv(dev
);
811 int work_budget
= max_interrupt_work
;
814 if (!netif_device_present(dev
))
816 ioaddr
= dev
->base_addr
;
818 pr_debug("%s: interrupt, status %4.4x.\n",
819 dev
->name
, inw(ioaddr
+ EL3_STATUS
));
821 spin_lock(&lp
->window_lock
);
823 while ((status
= inw(ioaddr
+ EL3_STATUS
)) &
824 (IntLatch
| RxComplete
| RxEarly
| StatsFull
)) {
825 if (!netif_device_present(dev
) ||
826 ((status
& 0xe000) != 0x2000)) {
827 pr_debug("%s: Interrupt from dead card\n", dev
->name
);
833 if (status
& RxComplete
)
834 work_budget
= el3_rx(dev
, work_budget
);
836 if (status
& TxAvailable
) {
837 pr_debug(" TX room bit was handled.\n");
838 /* There's room in the FIFO for a full-sized packet. */
839 outw(AckIntr
| TxAvailable
, ioaddr
+ EL3_CMD
);
840 netif_wake_queue(dev
);
843 if (status
& TxComplete
)
846 if (status
& (AdapterFailure
| RxEarly
| StatsFull
)) {
847 /* Handle all uncommon interrupts. */
848 if (status
& StatsFull
)
850 if (status
& RxEarly
) {
851 work_budget
= el3_rx(dev
, work_budget
);
852 outw(AckIntr
| RxEarly
, ioaddr
+ EL3_CMD
);
854 if (status
& AdapterFailure
) {
857 fifo_diag
= inw(ioaddr
+ Wn4_FIFODiag
);
859 printk(KERN_NOTICE
"%s: adapter failure, FIFO diagnostic"
860 " register %04x.\n", dev
->name
, fifo_diag
);
861 if (fifo_diag
& 0x0400) {
863 tc574_wait_for_completion(dev
, TxReset
);
864 outw(TxEnable
, ioaddr
+ EL3_CMD
);
866 if (fifo_diag
& 0x2000) {
868 tc574_wait_for_completion(dev
, RxReset
);
870 outw(RxEnable
, ioaddr
+ EL3_CMD
);
872 outw(AckIntr
| AdapterFailure
, ioaddr
+ EL3_CMD
);
876 if (--work_budget
< 0) {
877 pr_debug("%s: Too much work in interrupt, "
878 "status %4.4x.\n", dev
->name
, status
);
879 /* Clear all interrupts */
880 outw(AckIntr
| 0xFF, ioaddr
+ EL3_CMD
);
883 /* Acknowledge the IRQ. */
884 outw(AckIntr
| IntReq
| IntLatch
, ioaddr
+ EL3_CMD
);
887 pr_debug("%s: exiting interrupt, status %4.4x.\n",
888 dev
->name
, inw(ioaddr
+ EL3_STATUS
));
890 spin_unlock(&lp
->window_lock
);
891 return IRQ_RETVAL(handled
);
895 This timer serves two purposes: to check for missed interrupts
896 (and as a last resort, poll the NIC for events), and to monitor
897 the MII, reporting changes in cable status.
899 static void media_check(unsigned long arg
)
901 struct net_device
*dev
= (struct net_device
*) arg
;
902 struct el3_private
*lp
= netdev_priv(dev
);
903 unsigned int ioaddr
= dev
->base_addr
;
905 unsigned short /* cable, */ media
, partner
;
907 if (!netif_device_present(dev
))
910 /* Check for pending interrupt with expired latency timer: with
911 this, we can limp along even if the interrupt is blocked */
912 if ((inw(ioaddr
+ EL3_STATUS
) & IntLatch
) && (inb(ioaddr
+ Timer
) == 0xff)) {
914 printk(KERN_INFO
"%s: interrupt(s) dropped!\n", dev
->name
);
916 local_irq_save(flags
);
917 el3_interrupt(dev
->irq
, dev
);
918 local_irq_restore(flags
);
924 lp
->media
.expires
= jiffies
+ 2*HZ
/100;
925 add_timer(&lp
->media
);
929 spin_lock_irqsave(&lp
->window_lock
, flags
);
931 media
= mdio_read(ioaddr
, lp
->phys
, 1);
932 partner
= mdio_read(ioaddr
, lp
->phys
, 5);
935 if (media
!= lp
->media_status
) {
936 if ((media
^ lp
->media_status
) & 0x0004)
937 printk(KERN_INFO
"%s: %s link beat\n", dev
->name
,
938 (lp
->media_status
& 0x0004) ? "lost" : "found");
939 if ((media
^ lp
->media_status
) & 0x0020) {
941 if (lp
->media_status
& 0x0020) {
942 printk(KERN_INFO
"%s: autonegotiation restarted\n",
944 } else if (partner
) {
945 partner
&= lp
->advertising
;
946 lp
->partner
= partner
;
947 printk(KERN_INFO
"%s: autonegotiation complete: "
948 "%sbaseT-%cD selected\n", dev
->name
,
949 ((partner
& 0x0180) ? "100" : "10"),
950 ((partner
& 0x0140) ? 'F' : 'H'));
952 printk(KERN_INFO
"%s: link partner did not autonegotiate\n",
957 outb((partner
& 0x0140 ? 0x20 : 0) |
958 (dev
->mtu
> 1500 ? 0x40 : 0), ioaddr
+ Wn3_MAC_Ctrl
);
963 printk(KERN_INFO
"%s: remote fault detected\n",
966 printk(KERN_INFO
"%s: jabber detected\n", dev
->name
);
967 lp
->media_status
= media
;
969 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
972 lp
->media
.expires
= jiffies
+ HZ
;
973 add_timer(&lp
->media
);
976 static struct net_device_stats
*el3_get_stats(struct net_device
*dev
)
978 struct el3_private
*lp
= netdev_priv(dev
);
980 if (netif_device_present(dev
)) {
982 spin_lock_irqsave(&lp
->window_lock
, flags
);
984 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
989 /* Update statistics.
990 Suprisingly this need not be run single-threaded, but it effectively is.
991 The counters clear when read, so the adds must merely be atomic.
993 static void update_stats(struct net_device
*dev
)
995 unsigned int ioaddr
= dev
->base_addr
;
998 pr_debug("%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 dev
->stats
.tx_carrier_errors
+= inb(ioaddr
+ 0);
1007 dev
->stats
.tx_heartbeat_errors
+= inb(ioaddr
+ 1);
1008 /* Multiple collisions. */ inb(ioaddr
+ 2);
1009 dev
->stats
.collisions
+= inb(ioaddr
+ 3);
1010 dev
->stats
.tx_window_errors
+= inb(ioaddr
+ 4);
1011 dev
->stats
.rx_fifo_errors
+= inb(ioaddr
+ 5);
1012 dev
->stats
.tx_packets
+= inb(ioaddr
+ 6);
1013 up
= inb(ioaddr
+ 9);
1014 dev
->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 dev
->stats
.tx_bytes
+= tx
+ ((up
& 0xf0) << 12);
1029 static int el3_rx(struct net_device
*dev
, int worklimit
)
1031 unsigned int ioaddr
= dev
->base_addr
;
1034 pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
1035 dev
->name
, inw(ioaddr
+EL3_STATUS
), inw(ioaddr
+RxStatus
));
1036 while (!((rx_status
= inw(ioaddr
+ RxStatus
)) & 0x8000) &&
1039 if (rx_status
& 0x4000) { /* Error, update stats. */
1040 short error
= rx_status
& 0x3800;
1041 dev
->stats
.rx_errors
++;
1043 case 0x0000: dev
->stats
.rx_over_errors
++; break;
1044 case 0x0800: dev
->stats
.rx_length_errors
++; break;
1045 case 0x1000: dev
->stats
.rx_frame_errors
++; break;
1046 case 0x1800: dev
->stats
.rx_length_errors
++; break;
1047 case 0x2000: dev
->stats
.rx_frame_errors
++; break;
1048 case 0x2800: dev
->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 pr_debug(" Receiving packet size %d status %4.4x.\n",
1057 pkt_len
, rx_status
);
1059 skb_reserve(skb
, 2);
1060 insl(ioaddr
+RX_FIFO
, skb_put(skb
, pkt_len
),
1062 skb
->protocol
= eth_type_trans(skb
, dev
);
1064 dev
->stats
.rx_packets
++;
1065 dev
->stats
.rx_bytes
+= pkt_len
;
1067 pr_debug("%s: couldn't allocate a sk_buff of"
1068 " size %d.\n", dev
->name
, pkt_len
);
1069 dev
->stats
.rx_dropped
++;
1072 tc574_wait_for_completion(dev
, RxDiscard
);
1078 static void netdev_get_drvinfo(struct net_device
*dev
,
1079 struct ethtool_drvinfo
*info
)
1081 strcpy(info
->driver
, "3c574_cs");
1084 static const struct ethtool_ops netdev_ethtool_ops
= {
1085 .get_drvinfo
= netdev_get_drvinfo
,
1088 /* Provide ioctl() calls to examine the MII xcvr state. */
1089 static int el3_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1091 struct el3_private
*lp
= netdev_priv(dev
);
1092 unsigned int ioaddr
= dev
->base_addr
;
1093 struct mii_ioctl_data
*data
= if_mii(rq
);
1094 int phy
= lp
->phys
& 0x1f;
1096 pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n",
1097 dev
->name
, rq
->ifr_ifrn
.ifrn_name
, cmd
,
1098 data
->phy_id
, data
->reg_num
, data
->val_in
, data
->val_out
);
1101 case SIOCGMIIPHY
: /* Get the address of the PHY in use. */
1103 case SIOCGMIIREG
: /* Read the specified MII register. */
1106 unsigned long flags
;
1108 spin_lock_irqsave(&lp
->window_lock
, flags
);
1109 saved_window
= inw(ioaddr
+ EL3_CMD
) >> 13;
1111 data
->val_out
= mdio_read(ioaddr
, data
->phy_id
& 0x1f,
1112 data
->reg_num
& 0x1f);
1113 EL3WINDOW(saved_window
);
1114 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1117 case SIOCSMIIREG
: /* Write the specified MII register */
1120 unsigned long flags
;
1122 spin_lock_irqsave(&lp
->window_lock
, flags
);
1123 saved_window
= inw(ioaddr
+ EL3_CMD
) >> 13;
1125 mdio_write(ioaddr
, data
->phy_id
& 0x1f,
1126 data
->reg_num
& 0x1f, data
->val_in
);
1127 EL3WINDOW(saved_window
);
1128 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1136 /* The Odie chip has a 64 bin multicast filter, but the bit layout is not
1137 documented. Until it is we revert to receiving all multicast frames when
1138 any multicast reception is desired.
1139 Note: My other drivers emit a log message whenever promiscuous mode is
1140 entered to help detect password sniffers. This is less desirable on
1141 typical PC card machines, so we omit the message.
1144 static void set_rx_mode(struct net_device
*dev
)
1146 unsigned int ioaddr
= dev
->base_addr
;
1148 if (dev
->flags
& IFF_PROMISC
)
1149 outw(SetRxFilter
| RxStation
| RxMulticast
| RxBroadcast
| RxProm
,
1151 else if (dev
->mc_count
|| (dev
->flags
& IFF_ALLMULTI
))
1152 outw(SetRxFilter
|RxStation
|RxMulticast
|RxBroadcast
, ioaddr
+ EL3_CMD
);
1154 outw(SetRxFilter
| RxStation
| RxBroadcast
, ioaddr
+ EL3_CMD
);
1157 static void set_multicast_list(struct net_device
*dev
)
1159 struct el3_private
*lp
= netdev_priv(dev
);
1160 unsigned long flags
;
1162 spin_lock_irqsave(&lp
->window_lock
, flags
);
1164 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1167 static int el3_close(struct net_device
*dev
)
1169 unsigned int ioaddr
= dev
->base_addr
;
1170 struct el3_private
*lp
= netdev_priv(dev
);
1171 struct pcmcia_device
*link
= lp
->p_dev
;
1173 dev_dbg(&link
->dev
, "%s: shutting down ethercard.\n", dev
->name
);
1175 if (pcmcia_dev_present(link
)) {
1176 unsigned long flags
;
1178 /* Turn off statistics ASAP. We update lp->stats below. */
1179 outw(StatsDisable
, ioaddr
+ EL3_CMD
);
1181 /* Disable the receiver and transmitter. */
1182 outw(RxDisable
, ioaddr
+ EL3_CMD
);
1183 outw(TxDisable
, ioaddr
+ EL3_CMD
);
1185 /* Note: Switching to window 0 may disable the IRQ. */
1187 spin_lock_irqsave(&lp
->window_lock
, flags
);
1189 spin_unlock_irqrestore(&lp
->window_lock
, flags
);
1191 /* force interrupts off */
1192 outw(SetIntrEnb
| 0x0000, ioaddr
+ EL3_CMD
);
1196 netif_stop_queue(dev
);
1197 del_timer_sync(&lp
->media
);
1202 static struct pcmcia_device_id tc574_ids
[] = {
1203 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574),
1204 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"),
1207 MODULE_DEVICE_TABLE(pcmcia
, tc574_ids
);
1209 static struct pcmcia_driver tc574_driver
= {
1210 .owner
= THIS_MODULE
,
1214 .probe
= tc574_probe
,
1215 .remove
= tc574_detach
,
1216 .id_table
= tc574_ids
,
1217 .suspend
= tc574_suspend
,
1218 .resume
= tc574_resume
,
1221 static int __init
init_tc574(void)
1223 return pcmcia_register_driver(&tc574_driver
);
1226 static void __exit
exit_tc574(void)
1228 pcmcia_unregister_driver(&tc574_driver
);
1231 module_init(init_tc574
);
1232 module_exit(exit_tc574
);