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Commit | Line | Data |
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1da177e4 LT |
1 | /* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner". |
2 | ||
3 | Written 1993-1998 by | |
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 | |
7 | ||
8 | This software may be used and distributed according to the terms of | |
9 | the GNU General Public License, incorporated herein by reference. | |
10 | ||
11 | This driver derives from Donald Becker's 3c509 core, which has the | |
12 | following copyright: | |
13 | Copyright 1993 United States Government as represented by the | |
14 | Director, National Security Agency. | |
15 | ||
16 | ||
17 | */ | |
18 | ||
19 | /* | |
20 | Theory of Operation | |
21 | ||
22 | I. Board Compatibility | |
23 | ||
24 | This device driver is designed for the 3Com 3c574 PC card Fast Ethernet | |
25 | Adapter. | |
26 | ||
27 | II. Board-specific settings | |
28 | ||
29 | None -- PC cards are autoconfigured. | |
30 | ||
31 | III. Driver operation | |
32 | ||
33 | The 3c574 uses a Boomerang-style interface, without the bus-master capability. | |
34 | See the Boomerang driver and documentation for most details. | |
35 | ||
36 | IV. Notes and chip documentation. | |
37 | ||
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. | |
44 | ||
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. | |
49 | ||
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. | |
53 | ||
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. | |
58 | ||
59 | A final note: writing the InternalConfig register in window 3 with an | |
60 | invalid ramWidth is Very Bad. | |
61 | ||
62 | V. References | |
63 | ||
64 | http://www.scyld.com/expert/NWay.html | |
65 | http://www.national.com/pf/DP/DP83840.html | |
66 | ||
67 | Thanks to Terry Murphy of 3Com for providing development information for | |
68 | earlier 3Com products. | |
69 | ||
70 | */ | |
71 | ||
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> | |
79 | #include <linux/in.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> | |
0fa0ee05 | 88 | #include <linux/mii.h> |
1da177e4 | 89 | |
1da177e4 LT |
90 | #include <pcmcia/cistpl.h> |
91 | #include <pcmcia/cisreg.h> | |
92 | #include <pcmcia/ciscode.h> | |
93 | #include <pcmcia/ds.h> | |
1da177e4 LT |
94 | |
95 | #include <asm/uaccess.h> | |
96 | #include <asm/io.h> | |
97 | #include <asm/system.h> | |
98 | ||
99 | /*====================================================================*/ | |
100 | ||
101 | /* Module parameters */ | |
102 | ||
103 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
104 | MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver"); | |
105 | MODULE_LICENSE("GPL"); | |
106 | ||
107 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) | |
108 | ||
109 | /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ | |
110 | INT_MODULE_PARM(max_interrupt_work, 32); | |
111 | ||
112 | /* Force full duplex modes? */ | |
113 | INT_MODULE_PARM(full_duplex, 0); | |
114 | ||
115 | /* Autodetect link polarity reversal? */ | |
116 | INT_MODULE_PARM(auto_polarity, 1); | |
117 | ||
1da177e4 LT |
118 | |
119 | /*====================================================================*/ | |
120 | ||
121 | /* Time in jiffies before concluding the transmitter is hung. */ | |
122 | #define TX_TIMEOUT ((800*HZ)/1000) | |
123 | ||
124 | /* To minimize the size of the driver source and make the driver more | |
125 | readable not all constants are symbolically defined. | |
126 | You'll need the manual if you want to understand driver details anyway. */ | |
127 | /* Offsets from base I/O address. */ | |
128 | #define EL3_DATA 0x00 | |
129 | #define EL3_CMD 0x0e | |
130 | #define EL3_STATUS 0x0e | |
131 | ||
132 | #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) | |
133 | ||
134 | /* The top five bits written to EL3_CMD are a command, the lower | |
135 | 11 bits are the parameter, if applicable. */ | |
136 | enum el3_cmds { | |
137 | TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11, | |
138 | RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11, | |
139 | TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11, | |
140 | FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11, | |
141 | SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11, | |
142 | SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11, | |
143 | StatsDisable = 22<<11, StopCoax = 23<<11, | |
144 | }; | |
145 | ||
146 | enum elxl_status { | |
147 | IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, | |
148 | TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, | |
149 | IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 }; | |
150 | ||
151 | /* The SetRxFilter command accepts the following classes: */ | |
152 | enum RxFilter { | |
153 | RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 | |
154 | }; | |
155 | ||
156 | enum Window0 { | |
157 | Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */ | |
158 | IntrStatus=0x0E, /* Valid in all windows. */ | |
159 | }; | |
160 | /* These assumes the larger EEPROM. */ | |
161 | enum Win0_EEPROM_cmds { | |
162 | EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300, | |
163 | EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */ | |
164 | EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */ | |
165 | }; | |
166 | ||
167 | /* Register window 1 offsets, the window used in normal operation. | |
168 | On the "Odie" this window is always mapped at offsets 0x10-0x1f. | |
169 | Except for TxFree, which is overlapped by RunnerWrCtrl. */ | |
170 | enum Window1 { | |
171 | TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14, | |
172 | RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B, | |
173 | TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */ | |
174 | RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c, | |
175 | }; | |
176 | ||
177 | enum Window3 { /* Window 3: MAC/config bits. */ | |
178 | Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8, | |
179 | }; | |
b6659824 AV |
180 | enum wn3_config { |
181 | Ram_size = 7, | |
182 | Ram_width = 8, | |
183 | Ram_speed = 0x30, | |
184 | Rom_size = 0xc0, | |
185 | Ram_split_shift = 16, | |
186 | Ram_split = 3 << Ram_split_shift, | |
187 | Xcvr_shift = 20, | |
188 | Xcvr = 7 << Xcvr_shift, | |
189 | Autoselect = 0x1000000, | |
1da177e4 LT |
190 | }; |
191 | ||
192 | enum Window4 { /* Window 4: Xcvr/media bits. */ | |
193 | Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10, | |
194 | }; | |
195 | ||
196 | #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ | |
197 | ||
198 | struct el3_private { | |
fd238232 | 199 | struct pcmcia_device *p_dev; |
1da177e4 LT |
200 | u16 advertising, partner; /* NWay media advertisement */ |
201 | unsigned char phys; /* MII device address */ | |
202 | unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */ | |
203 | /* for transceiver monitoring */ | |
204 | struct timer_list media; | |
205 | unsigned short media_status; | |
206 | unsigned short fast_poll; | |
207 | unsigned long last_irq; | |
208 | spinlock_t window_lock; /* Guards the Window selection */ | |
209 | }; | |
210 | ||
211 | /* Set iff a MII transceiver on any interface requires mdio preamble. | |
212 | This only set with the original DP83840 on older 3c905 boards, so the extra | |
213 | code size of a per-interface flag is not worthwhile. */ | |
214 | static char mii_preamble_required = 0; | |
215 | ||
216 | /* Index of functions. */ | |
217 | ||
15b99ac1 | 218 | static int tc574_config(struct pcmcia_device *link); |
fba395ee | 219 | static void tc574_release(struct pcmcia_device *link); |
1da177e4 | 220 | |
906da809 OJ |
221 | static void mdio_sync(unsigned int ioaddr, int bits); |
222 | static int mdio_read(unsigned int ioaddr, int phy_id, int location); | |
223 | static void mdio_write(unsigned int ioaddr, int phy_id, int location, | |
224 | int value); | |
225 | static unsigned short read_eeprom(unsigned int ioaddr, int index); | |
1da177e4 LT |
226 | static void tc574_wait_for_completion(struct net_device *dev, int cmd); |
227 | ||
228 | static void tc574_reset(struct net_device *dev); | |
229 | static void media_check(unsigned long arg); | |
230 | static int el3_open(struct net_device *dev); | |
dbf02fae SH |
231 | static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
232 | struct net_device *dev); | |
7d12e780 | 233 | static irqreturn_t el3_interrupt(int irq, void *dev_id); |
1da177e4 LT |
234 | static void update_stats(struct net_device *dev); |
235 | static struct net_device_stats *el3_get_stats(struct net_device *dev); | |
236 | static int el3_rx(struct net_device *dev, int worklimit); | |
237 | static int el3_close(struct net_device *dev); | |
238 | static void el3_tx_timeout(struct net_device *dev); | |
239 | static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
7282d491 | 240 | static const struct ethtool_ops netdev_ethtool_ops; |
1da177e4 | 241 | static void set_rx_mode(struct net_device *dev); |
e3eef534 | 242 | static void set_multicast_list(struct net_device *dev); |
1da177e4 | 243 | |
cc3b4866 | 244 | static void tc574_detach(struct pcmcia_device *p_dev); |
1da177e4 | 245 | |
1da177e4 LT |
246 | /* |
247 | tc574_attach() creates an "instance" of the driver, allocating | |
248 | local data structures for one device. The device is registered | |
249 | with Card Services. | |
250 | */ | |
fb72e2ff SH |
251 | static const struct net_device_ops el3_netdev_ops = { |
252 | .ndo_open = el3_open, | |
253 | .ndo_stop = el3_close, | |
254 | .ndo_start_xmit = el3_start_xmit, | |
255 | .ndo_tx_timeout = el3_tx_timeout, | |
256 | .ndo_get_stats = el3_get_stats, | |
257 | .ndo_do_ioctl = el3_ioctl, | |
e3eef534 | 258 | .ndo_set_multicast_list = set_multicast_list, |
fb72e2ff SH |
259 | .ndo_change_mtu = eth_change_mtu, |
260 | .ndo_set_mac_address = eth_mac_addr, | |
261 | .ndo_validate_addr = eth_validate_addr, | |
262 | }; | |
1da177e4 | 263 | |
15b99ac1 | 264 | static int tc574_probe(struct pcmcia_device *link) |
1da177e4 LT |
265 | { |
266 | struct el3_private *lp; | |
1da177e4 | 267 | struct net_device *dev; |
1da177e4 | 268 | |
dd0fab5b | 269 | dev_dbg(&link->dev, "3c574_attach()\n"); |
1da177e4 LT |
270 | |
271 | /* Create the PC card device object. */ | |
272 | dev = alloc_etherdev(sizeof(struct el3_private)); | |
273 | if (!dev) | |
f8cfa618 | 274 | return -ENOMEM; |
1da177e4 | 275 | lp = netdev_priv(dev); |
1da177e4 | 276 | link->priv = dev; |
fba395ee | 277 | lp->p_dev = link; |
1da177e4 LT |
278 | |
279 | spin_lock_init(&lp->window_lock); | |
90abdc3b DB |
280 | link->resource[0]->end = 32; |
281 | link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16; | |
1ac71e5a | 282 | link->config_flags |= CONF_ENABLE_IRQ; |
7feabb64 | 283 | link->config_index = 1; |
1da177e4 | 284 | |
fb72e2ff | 285 | dev->netdev_ops = &el3_netdev_ops; |
1da177e4 | 286 | SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); |
1da177e4 | 287 | dev->watchdog_timeo = TX_TIMEOUT; |
1da177e4 | 288 | |
15b99ac1 | 289 | return tc574_config(link); |
2262054e | 290 | } |
1da177e4 | 291 | |
fba395ee | 292 | static void tc574_detach(struct pcmcia_device *link) |
1da177e4 LT |
293 | { |
294 | struct net_device *dev = link->priv; | |
1da177e4 | 295 | |
dd0fab5b | 296 | dev_dbg(&link->dev, "3c574_detach()\n"); |
1da177e4 | 297 | |
c7c2fa07 | 298 | unregister_netdev(dev); |
1da177e4 | 299 | |
e2d40963 | 300 | tc574_release(link); |
1da177e4 | 301 | |
1da177e4 LT |
302 | free_netdev(dev); |
303 | } /* tc574_detach */ | |
304 | ||
f71e1309 | 305 | static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; |
1da177e4 | 306 | |
15b99ac1 | 307 | static int tc574_config(struct pcmcia_device *link) |
1da177e4 | 308 | { |
1da177e4 LT |
309 | struct net_device *dev = link->priv; |
310 | struct el3_private *lp = netdev_priv(dev); | |
dd0fab5b | 311 | int ret, i, j; |
906da809 | 312 | unsigned int ioaddr; |
b1e247ad | 313 | __be16 *phys_addr; |
1da177e4 | 314 | char *cardname; |
b6659824 | 315 | __u32 config; |
dddfbd82 DB |
316 | u8 *buf; |
317 | size_t len; | |
1da177e4 | 318 | |
b1e247ad | 319 | phys_addr = (__be16 *)dev->dev_addr; |
1da177e4 | 320 | |
dd0fab5b | 321 | dev_dbg(&link->dev, "3c574_config()\n"); |
1da177e4 | 322 | |
90abdc3b DB |
323 | link->io_lines = 16; |
324 | ||
1da177e4 | 325 | for (i = j = 0; j < 0x400; j += 0x20) { |
90abdc3b DB |
326 | link->resource[0]->start = j ^ 0x300; |
327 | i = pcmcia_request_io(link); | |
4c89e88b DB |
328 | if (i == 0) |
329 | break; | |
1da177e4 | 330 | } |
dd0fab5b DB |
331 | if (i != 0) |
332 | goto failed; | |
333 | ||
eb14120f | 334 | ret = pcmcia_request_irq(link, el3_interrupt); |
dd0fab5b DB |
335 | if (ret) |
336 | goto failed; | |
337 | ||
1ac71e5a | 338 | ret = pcmcia_enable_device(link); |
dd0fab5b | 339 | if (ret) |
1da177e4 | 340 | goto failed; |
1da177e4 | 341 | |
eb14120f | 342 | dev->irq = link->irq; |
9a017a91 | 343 | dev->base_addr = link->resource[0]->start; |
1da177e4 LT |
344 | |
345 | ioaddr = dev->base_addr; | |
346 | ||
347 | /* The 3c574 normally uses an EEPROM for configuration info, including | |
348 | the hardware address. The future products may include a modem chip | |
349 | and put the address in the CIS. */ | |
dddfbd82 DB |
350 | |
351 | len = pcmcia_get_tuple(link, 0x88, &buf); | |
352 | if (buf && len >= 6) { | |
1da177e4 | 353 | for (i = 0; i < 3; i++) |
dddfbd82 DB |
354 | phys_addr[i] = htons(le16_to_cpu(buf[i * 2])); |
355 | kfree(buf); | |
1da177e4 | 356 | } else { |
dddfbd82 | 357 | kfree(buf); /* 0 < len < 6 */ |
1da177e4 LT |
358 | EL3WINDOW(0); |
359 | for (i = 0; i < 3; i++) | |
360 | phys_addr[i] = htons(read_eeprom(ioaddr, i + 10)); | |
b1e247ad | 361 | if (phys_addr[0] == htons(0x6060)) { |
1da177e4 LT |
362 | printk(KERN_NOTICE "3c574_cs: IO port conflict at 0x%03lx" |
363 | "-0x%03lx\n", dev->base_addr, dev->base_addr+15); | |
364 | goto failed; | |
365 | } | |
366 | } | |
a9606fd3 DB |
367 | if (link->prod_id[1]) |
368 | cardname = link->prod_id[1]; | |
369 | else | |
1da177e4 LT |
370 | cardname = "3Com 3c574"; |
371 | ||
372 | { | |
373 | u_char mcr; | |
374 | outw(2<<11, ioaddr + RunnerRdCtrl); | |
375 | mcr = inb(ioaddr + 2); | |
376 | outw(0<<11, ioaddr + RunnerRdCtrl); | |
377 | printk(KERN_INFO " ASIC rev %d,", mcr>>3); | |
378 | EL3WINDOW(3); | |
b6659824 AV |
379 | config = inl(ioaddr + Wn3_Config); |
380 | lp->default_media = (config & Xcvr) >> Xcvr_shift; | |
381 | lp->autoselect = config & Autoselect ? 1 : 0; | |
1da177e4 LT |
382 | } |
383 | ||
384 | init_timer(&lp->media); | |
385 | ||
386 | { | |
387 | int phy; | |
388 | ||
389 | /* Roadrunner only: Turn on the MII transceiver */ | |
390 | outw(0x8040, ioaddr + Wn3_Options); | |
391 | mdelay(1); | |
392 | outw(0xc040, ioaddr + Wn3_Options); | |
393 | tc574_wait_for_completion(dev, TxReset); | |
394 | tc574_wait_for_completion(dev, RxReset); | |
395 | mdelay(1); | |
396 | outw(0x8040, ioaddr + Wn3_Options); | |
397 | ||
398 | EL3WINDOW(4); | |
399 | for (phy = 1; phy <= 32; phy++) { | |
400 | int mii_status; | |
401 | mdio_sync(ioaddr, 32); | |
402 | mii_status = mdio_read(ioaddr, phy & 0x1f, 1); | |
403 | if (mii_status != 0xffff) { | |
404 | lp->phys = phy & 0x1f; | |
dd0fab5b DB |
405 | dev_dbg(&link->dev, " MII transceiver at " |
406 | "index %d, status %x.\n", | |
1da177e4 LT |
407 | phy, mii_status); |
408 | if ((mii_status & 0x0040) == 0) | |
409 | mii_preamble_required = 1; | |
410 | break; | |
411 | } | |
412 | } | |
413 | if (phy > 32) { | |
414 | printk(KERN_NOTICE " No MII transceivers found!\n"); | |
415 | goto failed; | |
416 | } | |
417 | i = mdio_read(ioaddr, lp->phys, 16) | 0x40; | |
418 | mdio_write(ioaddr, lp->phys, 16, i); | |
419 | lp->advertising = mdio_read(ioaddr, lp->phys, 4); | |
420 | if (full_duplex) { | |
421 | /* Only advertise the FD media types. */ | |
422 | lp->advertising &= ~0x02a0; | |
423 | mdio_write(ioaddr, lp->phys, 4, lp->advertising); | |
424 | } | |
425 | } | |
426 | ||
dd2e5a15 | 427 | SET_NETDEV_DEV(dev, &link->dev); |
1da177e4 LT |
428 | |
429 | if (register_netdev(dev) != 0) { | |
430 | printk(KERN_NOTICE "3c574_cs: register_netdev() failed\n"); | |
1da177e4 LT |
431 | goto failed; |
432 | } | |
433 | ||
0795af57 | 434 | printk(KERN_INFO "%s: %s at io %#3lx, irq %d, " |
e174961c | 435 | "hw_addr %pM.\n", |
0795af57 | 436 | dev->name, cardname, dev->base_addr, dev->irq, |
e174961c | 437 | dev->dev_addr); |
1da177e4 | 438 | printk(" %dK FIFO split %s Rx:Tx, %sMII interface.\n", |
b6659824 AV |
439 | 8 << config & Ram_size, |
440 | ram_split[(config & Ram_split) >> Ram_split_shift], | |
441 | config & Autoselect ? "autoselect " : ""); | |
1da177e4 | 442 | |
15b99ac1 | 443 | return 0; |
1da177e4 | 444 | |
1da177e4 LT |
445 | failed: |
446 | tc574_release(link); | |
15b99ac1 | 447 | return -ENODEV; |
1da177e4 LT |
448 | |
449 | } /* tc574_config */ | |
450 | ||
fba395ee | 451 | static void tc574_release(struct pcmcia_device *link) |
1da177e4 | 452 | { |
fba395ee | 453 | pcmcia_disable_device(link); |
1da177e4 LT |
454 | } |
455 | ||
fba395ee | 456 | static int tc574_suspend(struct pcmcia_device *link) |
98e4c28b | 457 | { |
98e4c28b DB |
458 | struct net_device *dev = link->priv; |
459 | ||
e2d40963 | 460 | if (link->open) |
8661bb5b | 461 | netif_device_detach(dev); |
98e4c28b DB |
462 | |
463 | return 0; | |
464 | } | |
465 | ||
fba395ee | 466 | static int tc574_resume(struct pcmcia_device *link) |
98e4c28b | 467 | { |
98e4c28b DB |
468 | struct net_device *dev = link->priv; |
469 | ||
e2d40963 | 470 | if (link->open) { |
8661bb5b DB |
471 | tc574_reset(dev); |
472 | netif_device_attach(dev); | |
98e4c28b DB |
473 | } |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
1da177e4 LT |
478 | static void dump_status(struct net_device *dev) |
479 | { | |
906da809 | 480 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
481 | EL3WINDOW(1); |
482 | printk(KERN_INFO " irq status %04x, rx status %04x, tx status " | |
483 | "%02x, tx free %04x\n", inw(ioaddr+EL3_STATUS), | |
484 | inw(ioaddr+RxStatus), inb(ioaddr+TxStatus), | |
485 | inw(ioaddr+TxFree)); | |
486 | EL3WINDOW(4); | |
487 | printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x" | |
488 | " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06), | |
489 | inw(ioaddr+0x08), inw(ioaddr+0x0a)); | |
490 | EL3WINDOW(1); | |
491 | } | |
492 | ||
493 | /* | |
494 | Use this for commands that may take time to finish | |
495 | */ | |
496 | static void tc574_wait_for_completion(struct net_device *dev, int cmd) | |
497 | { | |
498 | int i = 1500; | |
499 | outw(cmd, dev->base_addr + EL3_CMD); | |
500 | while (--i > 0) | |
501 | if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break; | |
502 | if (i == 0) | |
503 | printk(KERN_NOTICE "%s: command 0x%04x did not complete!\n", dev->name, cmd); | |
504 | } | |
505 | ||
506 | /* Read a word from the EEPROM using the regular EEPROM access register. | |
507 | Assume that we are in register window zero. | |
508 | */ | |
906da809 | 509 | static unsigned short read_eeprom(unsigned int ioaddr, int index) |
1da177e4 LT |
510 | { |
511 | int timer; | |
512 | outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd); | |
513 | /* Pause for at least 162 usec for the read to take place. */ | |
514 | for (timer = 1620; timer >= 0; timer--) { | |
515 | if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0) | |
516 | break; | |
517 | } | |
518 | return inw(ioaddr + Wn0EepromData); | |
519 | } | |
520 | ||
521 | /* MII transceiver control section. | |
522 | Read and write the MII registers using software-generated serial | |
523 | MDIO protocol. See the MII specifications or DP83840A data sheet | |
524 | for details. | |
525 | The maxium data clock rate is 2.5 Mhz. The timing is easily met by the | |
526 | slow PC card interface. */ | |
527 | ||
528 | #define MDIO_SHIFT_CLK 0x01 | |
529 | #define MDIO_DIR_WRITE 0x04 | |
530 | #define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE) | |
531 | #define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE) | |
532 | #define MDIO_DATA_READ 0x02 | |
533 | #define MDIO_ENB_IN 0x00 | |
534 | ||
535 | /* Generate the preamble required for initial synchronization and | |
536 | a few older transceivers. */ | |
906da809 | 537 | static void mdio_sync(unsigned int ioaddr, int bits) |
1da177e4 | 538 | { |
906da809 | 539 | unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
1da177e4 LT |
540 | |
541 | /* Establish sync by sending at least 32 logic ones. */ | |
542 | while (-- bits >= 0) { | |
543 | outw(MDIO_DATA_WRITE1, mdio_addr); | |
544 | outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); | |
545 | } | |
546 | } | |
547 | ||
906da809 | 548 | static int mdio_read(unsigned int ioaddr, int phy_id, int location) |
1da177e4 LT |
549 | { |
550 | int i; | |
551 | int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; | |
552 | unsigned int retval = 0; | |
906da809 | 553 | unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
1da177e4 LT |
554 | |
555 | if (mii_preamble_required) | |
556 | mdio_sync(ioaddr, 32); | |
557 | ||
558 | /* Shift the read command bits out. */ | |
559 | for (i = 14; i >= 0; i--) { | |
560 | int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
561 | outw(dataval, mdio_addr); | |
562 | outw(dataval | MDIO_SHIFT_CLK, mdio_addr); | |
563 | } | |
564 | /* Read the two transition, 16 data, and wire-idle bits. */ | |
565 | for (i = 19; i > 0; i--) { | |
566 | outw(MDIO_ENB_IN, mdio_addr); | |
567 | retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); | |
568 | outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); | |
569 | } | |
570 | return (retval>>1) & 0xffff; | |
571 | } | |
572 | ||
906da809 | 573 | static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value) |
1da177e4 LT |
574 | { |
575 | int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value; | |
906da809 | 576 | unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
1da177e4 LT |
577 | int i; |
578 | ||
579 | if (mii_preamble_required) | |
580 | mdio_sync(ioaddr, 32); | |
581 | ||
582 | /* Shift the command bits out. */ | |
583 | for (i = 31; i >= 0; i--) { | |
584 | int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
585 | outw(dataval, mdio_addr); | |
586 | outw(dataval | MDIO_SHIFT_CLK, mdio_addr); | |
587 | } | |
588 | /* Leave the interface idle. */ | |
589 | for (i = 1; i >= 0; i--) { | |
590 | outw(MDIO_ENB_IN, mdio_addr); | |
591 | outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); | |
592 | } | |
1da177e4 LT |
593 | } |
594 | ||
595 | /* Reset and restore all of the 3c574 registers. */ | |
596 | static void tc574_reset(struct net_device *dev) | |
597 | { | |
598 | struct el3_private *lp = netdev_priv(dev); | |
599 | int i; | |
906da809 | 600 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
601 | unsigned long flags; |
602 | ||
603 | tc574_wait_for_completion(dev, TotalReset|0x10); | |
604 | ||
605 | spin_lock_irqsave(&lp->window_lock, flags); | |
606 | /* Clear any transactions in progress. */ | |
607 | outw(0, ioaddr + RunnerWrCtrl); | |
608 | outw(0, ioaddr + RunnerRdCtrl); | |
609 | ||
610 | /* Set the station address and mask. */ | |
611 | EL3WINDOW(2); | |
612 | for (i = 0; i < 6; i++) | |
613 | outb(dev->dev_addr[i], ioaddr + i); | |
614 | for (; i < 12; i+=2) | |
615 | outw(0, ioaddr + i); | |
616 | ||
617 | /* Reset config options */ | |
618 | EL3WINDOW(3); | |
619 | outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); | |
620 | outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b, | |
621 | ioaddr + Wn3_Config); | |
622 | /* Roadrunner only: Turn on the MII transceiver. */ | |
623 | outw(0x8040, ioaddr + Wn3_Options); | |
624 | mdelay(1); | |
625 | outw(0xc040, ioaddr + Wn3_Options); | |
626 | EL3WINDOW(1); | |
627 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
628 | ||
629 | tc574_wait_for_completion(dev, TxReset); | |
630 | tc574_wait_for_completion(dev, RxReset); | |
631 | mdelay(1); | |
632 | spin_lock_irqsave(&lp->window_lock, flags); | |
633 | EL3WINDOW(3); | |
634 | outw(0x8040, ioaddr + Wn3_Options); | |
635 | ||
636 | /* Switch to the stats window, and clear all stats by reading. */ | |
637 | outw(StatsDisable, ioaddr + EL3_CMD); | |
638 | EL3WINDOW(6); | |
639 | for (i = 0; i < 10; i++) | |
640 | inb(ioaddr + i); | |
641 | inw(ioaddr + 10); | |
642 | inw(ioaddr + 12); | |
643 | EL3WINDOW(4); | |
644 | inb(ioaddr + 12); | |
645 | inb(ioaddr + 13); | |
646 | ||
647 | /* .. enable any extra statistics bits.. */ | |
648 | outw(0x0040, ioaddr + Wn4_NetDiag); | |
649 | ||
650 | EL3WINDOW(1); | |
651 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
652 | ||
653 | /* .. re-sync MII and re-fill what NWay is advertising. */ | |
654 | mdio_sync(ioaddr, 32); | |
655 | mdio_write(ioaddr, lp->phys, 4, lp->advertising); | |
656 | if (!auto_polarity) { | |
657 | /* works for TDK 78Q2120 series MII's */ | |
1569d9e8 | 658 | i = mdio_read(ioaddr, lp->phys, 16) | 0x20; |
1da177e4 LT |
659 | mdio_write(ioaddr, lp->phys, 16, i); |
660 | } | |
661 | ||
662 | spin_lock_irqsave(&lp->window_lock, flags); | |
663 | /* Switch to register set 1 for normal use, just for TxFree. */ | |
664 | set_rx_mode(dev); | |
665 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
666 | outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ | |
667 | outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ | |
668 | outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ | |
669 | /* Allow status bits to be seen. */ | |
670 | outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD); | |
671 | /* Ack all pending events, and set active indicator mask. */ | |
672 | outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq, | |
673 | ioaddr + EL3_CMD); | |
674 | outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull | |
675 | | AdapterFailure | RxEarly, ioaddr + EL3_CMD); | |
676 | } | |
677 | ||
678 | static int el3_open(struct net_device *dev) | |
679 | { | |
680 | struct el3_private *lp = netdev_priv(dev); | |
fba395ee | 681 | struct pcmcia_device *link = lp->p_dev; |
1da177e4 | 682 | |
9940ec36 | 683 | if (!pcmcia_dev_present(link)) |
1da177e4 LT |
684 | return -ENODEV; |
685 | ||
686 | link->open++; | |
687 | netif_start_queue(dev); | |
688 | ||
689 | tc574_reset(dev); | |
690 | lp->media.function = &media_check; | |
691 | lp->media.data = (unsigned long) dev; | |
692 | lp->media.expires = jiffies + HZ; | |
693 | add_timer(&lp->media); | |
694 | ||
dd0fab5b | 695 | dev_dbg(&link->dev, "%s: opened, status %4.4x.\n", |
1da177e4 LT |
696 | dev->name, inw(dev->base_addr + EL3_STATUS)); |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static void el3_tx_timeout(struct net_device *dev) | |
702 | { | |
906da809 | 703 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
704 | |
705 | printk(KERN_NOTICE "%s: Transmit timed out!\n", dev->name); | |
706 | dump_status(dev); | |
2e8d31d5 | 707 | dev->stats.tx_errors++; |
1ae5dc34 | 708 | dev->trans_start = jiffies; /* prevent tx timeout */ |
1da177e4 LT |
709 | /* Issue TX_RESET and TX_START commands. */ |
710 | tc574_wait_for_completion(dev, TxReset); | |
711 | outw(TxEnable, ioaddr + EL3_CMD); | |
712 | netif_wake_queue(dev); | |
713 | } | |
714 | ||
715 | static void pop_tx_status(struct net_device *dev) | |
716 | { | |
906da809 | 717 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
718 | int i; |
719 | ||
720 | /* Clear the Tx status stack. */ | |
721 | for (i = 32; i > 0; i--) { | |
722 | u_char tx_status = inb(ioaddr + TxStatus); | |
723 | if (!(tx_status & 0x84)) | |
724 | break; | |
725 | /* reset transmitter on jabber error or underrun */ | |
726 | if (tx_status & 0x30) | |
727 | tc574_wait_for_completion(dev, TxReset); | |
728 | if (tx_status & 0x38) { | |
dd0fab5b | 729 | pr_debug("%s: transmit error: status 0x%02x\n", |
1da177e4 LT |
730 | dev->name, tx_status); |
731 | outw(TxEnable, ioaddr + EL3_CMD); | |
2e8d31d5 | 732 | dev->stats.tx_aborted_errors++; |
1da177e4 LT |
733 | } |
734 | outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ | |
735 | } | |
736 | } | |
737 | ||
dbf02fae SH |
738 | static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
739 | struct net_device *dev) | |
1da177e4 | 740 | { |
906da809 | 741 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
742 | struct el3_private *lp = netdev_priv(dev); |
743 | unsigned long flags; | |
744 | ||
dd0fab5b | 745 | pr_debug("%s: el3_start_xmit(length = %ld) called, " |
1da177e4 LT |
746 | "status %4.4x.\n", dev->name, (long)skb->len, |
747 | inw(ioaddr + EL3_STATUS)); | |
748 | ||
749 | spin_lock_irqsave(&lp->window_lock, flags); | |
df245dce AK |
750 | |
751 | dev->stats.tx_bytes += skb->len; | |
752 | ||
753 | /* Put out the doubleword header... */ | |
1da177e4 LT |
754 | outw(skb->len, ioaddr + TX_FIFO); |
755 | outw(0, ioaddr + TX_FIFO); | |
df245dce | 756 | /* ... and the packet rounded to a doubleword. */ |
1da177e4 LT |
757 | outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2); |
758 | ||
1da177e4 LT |
759 | /* TxFree appears only in Window 1, not offset 0x1c. */ |
760 | if (inw(ioaddr + TxFree) <= 1536) { | |
761 | netif_stop_queue(dev); | |
762 | /* Interrupt us when the FIFO has room for max-sized packet. | |
763 | The threshold is in units of dwords. */ | |
764 | outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); | |
765 | } | |
766 | ||
767 | pop_tx_status(dev); | |
768 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
769 | dev_kfree_skb(skb); | |
6ed10654 | 770 | return NETDEV_TX_OK; |
1da177e4 LT |
771 | } |
772 | ||
773 | /* The EL3 interrupt handler. */ | |
7d12e780 | 774 | static irqreturn_t el3_interrupt(int irq, void *dev_id) |
1da177e4 LT |
775 | { |
776 | struct net_device *dev = (struct net_device *) dev_id; | |
777 | struct el3_private *lp = netdev_priv(dev); | |
906da809 | 778 | unsigned int ioaddr; |
1da177e4 LT |
779 | unsigned status; |
780 | int work_budget = max_interrupt_work; | |
781 | int handled = 0; | |
782 | ||
783 | if (!netif_device_present(dev)) | |
784 | return IRQ_NONE; | |
785 | ioaddr = dev->base_addr; | |
786 | ||
dd0fab5b | 787 | pr_debug("%s: interrupt, status %4.4x.\n", |
1da177e4 LT |
788 | dev->name, inw(ioaddr + EL3_STATUS)); |
789 | ||
790 | spin_lock(&lp->window_lock); | |
791 | ||
792 | while ((status = inw(ioaddr + EL3_STATUS)) & | |
793 | (IntLatch | RxComplete | RxEarly | StatsFull)) { | |
794 | if (!netif_device_present(dev) || | |
795 | ((status & 0xe000) != 0x2000)) { | |
dd0fab5b | 796 | pr_debug("%s: Interrupt from dead card\n", dev->name); |
1da177e4 LT |
797 | break; |
798 | } | |
799 | ||
800 | handled = 1; | |
801 | ||
802 | if (status & RxComplete) | |
803 | work_budget = el3_rx(dev, work_budget); | |
804 | ||
805 | if (status & TxAvailable) { | |
dd0fab5b | 806 | pr_debug(" TX room bit was handled.\n"); |
1da177e4 LT |
807 | /* There's room in the FIFO for a full-sized packet. */ |
808 | outw(AckIntr | TxAvailable, ioaddr + EL3_CMD); | |
809 | netif_wake_queue(dev); | |
810 | } | |
811 | ||
812 | if (status & TxComplete) | |
813 | pop_tx_status(dev); | |
814 | ||
815 | if (status & (AdapterFailure | RxEarly | StatsFull)) { | |
816 | /* Handle all uncommon interrupts. */ | |
817 | if (status & StatsFull) | |
818 | update_stats(dev); | |
819 | if (status & RxEarly) { | |
820 | work_budget = el3_rx(dev, work_budget); | |
821 | outw(AckIntr | RxEarly, ioaddr + EL3_CMD); | |
822 | } | |
823 | if (status & AdapterFailure) { | |
824 | u16 fifo_diag; | |
825 | EL3WINDOW(4); | |
826 | fifo_diag = inw(ioaddr + Wn4_FIFODiag); | |
827 | EL3WINDOW(1); | |
828 | printk(KERN_NOTICE "%s: adapter failure, FIFO diagnostic" | |
829 | " register %04x.\n", dev->name, fifo_diag); | |
830 | if (fifo_diag & 0x0400) { | |
831 | /* Tx overrun */ | |
832 | tc574_wait_for_completion(dev, TxReset); | |
833 | outw(TxEnable, ioaddr + EL3_CMD); | |
834 | } | |
835 | if (fifo_diag & 0x2000) { | |
836 | /* Rx underrun */ | |
837 | tc574_wait_for_completion(dev, RxReset); | |
838 | set_rx_mode(dev); | |
839 | outw(RxEnable, ioaddr + EL3_CMD); | |
840 | } | |
841 | outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); | |
842 | } | |
843 | } | |
844 | ||
845 | if (--work_budget < 0) { | |
dd0fab5b | 846 | pr_debug("%s: Too much work in interrupt, " |
1da177e4 LT |
847 | "status %4.4x.\n", dev->name, status); |
848 | /* Clear all interrupts */ | |
849 | outw(AckIntr | 0xFF, ioaddr + EL3_CMD); | |
850 | break; | |
851 | } | |
852 | /* Acknowledge the IRQ. */ | |
853 | outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); | |
854 | } | |
855 | ||
dd0fab5b | 856 | pr_debug("%s: exiting interrupt, status %4.4x.\n", |
1da177e4 LT |
857 | dev->name, inw(ioaddr + EL3_STATUS)); |
858 | ||
859 | spin_unlock(&lp->window_lock); | |
860 | return IRQ_RETVAL(handled); | |
861 | } | |
862 | ||
863 | /* | |
864 | This timer serves two purposes: to check for missed interrupts | |
865 | (and as a last resort, poll the NIC for events), and to monitor | |
866 | the MII, reporting changes in cable status. | |
867 | */ | |
868 | static void media_check(unsigned long arg) | |
869 | { | |
870 | struct net_device *dev = (struct net_device *) arg; | |
871 | struct el3_private *lp = netdev_priv(dev); | |
906da809 | 872 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
873 | unsigned long flags; |
874 | unsigned short /* cable, */ media, partner; | |
875 | ||
876 | if (!netif_device_present(dev)) | |
877 | goto reschedule; | |
878 | ||
879 | /* Check for pending interrupt with expired latency timer: with | |
880 | this, we can limp along even if the interrupt is blocked */ | |
881 | if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) { | |
882 | if (!lp->fast_poll) | |
883 | printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); | |
671c8806 KK |
884 | |
885 | local_irq_save(flags); | |
e363d138 | 886 | el3_interrupt(dev->irq, dev); |
671c8806 KK |
887 | local_irq_restore(flags); |
888 | ||
1da177e4 LT |
889 | lp->fast_poll = HZ; |
890 | } | |
891 | if (lp->fast_poll) { | |
892 | lp->fast_poll--; | |
893 | lp->media.expires = jiffies + 2*HZ/100; | |
894 | add_timer(&lp->media); | |
895 | return; | |
896 | } | |
897 | ||
898 | spin_lock_irqsave(&lp->window_lock, flags); | |
899 | EL3WINDOW(4); | |
900 | media = mdio_read(ioaddr, lp->phys, 1); | |
901 | partner = mdio_read(ioaddr, lp->phys, 5); | |
902 | EL3WINDOW(1); | |
903 | ||
904 | if (media != lp->media_status) { | |
905 | if ((media ^ lp->media_status) & 0x0004) | |
906 | printk(KERN_INFO "%s: %s link beat\n", dev->name, | |
907 | (lp->media_status & 0x0004) ? "lost" : "found"); | |
908 | if ((media ^ lp->media_status) & 0x0020) { | |
909 | lp->partner = 0; | |
910 | if (lp->media_status & 0x0020) { | |
911 | printk(KERN_INFO "%s: autonegotiation restarted\n", | |
912 | dev->name); | |
913 | } else if (partner) { | |
914 | partner &= lp->advertising; | |
915 | lp->partner = partner; | |
916 | printk(KERN_INFO "%s: autonegotiation complete: " | |
917 | "%sbaseT-%cD selected\n", dev->name, | |
918 | ((partner & 0x0180) ? "100" : "10"), | |
919 | ((partner & 0x0140) ? 'F' : 'H')); | |
920 | } else { | |
921 | printk(KERN_INFO "%s: link partner did not autonegotiate\n", | |
922 | dev->name); | |
923 | } | |
924 | ||
925 | EL3WINDOW(3); | |
926 | outb((partner & 0x0140 ? 0x20 : 0) | | |
927 | (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); | |
928 | EL3WINDOW(1); | |
929 | ||
930 | } | |
931 | if (media & 0x0010) | |
932 | printk(KERN_INFO "%s: remote fault detected\n", | |
933 | dev->name); | |
934 | if (media & 0x0002) | |
935 | printk(KERN_INFO "%s: jabber detected\n", dev->name); | |
936 | lp->media_status = media; | |
937 | } | |
938 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
939 | ||
940 | reschedule: | |
941 | lp->media.expires = jiffies + HZ; | |
942 | add_timer(&lp->media); | |
943 | } | |
944 | ||
945 | static struct net_device_stats *el3_get_stats(struct net_device *dev) | |
946 | { | |
947 | struct el3_private *lp = netdev_priv(dev); | |
948 | ||
949 | if (netif_device_present(dev)) { | |
950 | unsigned long flags; | |
951 | spin_lock_irqsave(&lp->window_lock, flags); | |
952 | update_stats(dev); | |
953 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
954 | } | |
2e8d31d5 | 955 | return &dev->stats; |
1da177e4 LT |
956 | } |
957 | ||
958 | /* Update statistics. | |
959 | Suprisingly this need not be run single-threaded, but it effectively is. | |
960 | The counters clear when read, so the adds must merely be atomic. | |
961 | */ | |
962 | static void update_stats(struct net_device *dev) | |
963 | { | |
906da809 | 964 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
965 | u8 rx, tx, up; |
966 | ||
dd0fab5b | 967 | pr_debug("%s: updating the statistics.\n", dev->name); |
1da177e4 LT |
968 | |
969 | if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */ | |
970 | return; | |
971 | ||
972 | /* Unlike the 3c509 we need not turn off stats updates while reading. */ | |
973 | /* Switch to the stats window, and read everything. */ | |
974 | EL3WINDOW(6); | |
2e8d31d5 PZ |
975 | dev->stats.tx_carrier_errors += inb(ioaddr + 0); |
976 | dev->stats.tx_heartbeat_errors += inb(ioaddr + 1); | |
1da177e4 | 977 | /* Multiple collisions. */ inb(ioaddr + 2); |
2e8d31d5 PZ |
978 | dev->stats.collisions += inb(ioaddr + 3); |
979 | dev->stats.tx_window_errors += inb(ioaddr + 4); | |
980 | dev->stats.rx_fifo_errors += inb(ioaddr + 5); | |
981 | dev->stats.tx_packets += inb(ioaddr + 6); | |
1da177e4 | 982 | up = inb(ioaddr + 9); |
2e8d31d5 | 983 | dev->stats.tx_packets += (up&0x30) << 4; |
1da177e4 LT |
984 | /* Rx packets */ inb(ioaddr + 7); |
985 | /* Tx deferrals */ inb(ioaddr + 8); | |
986 | rx = inw(ioaddr + 10); | |
987 | tx = inw(ioaddr + 12); | |
988 | ||
989 | EL3WINDOW(4); | |
990 | /* BadSSD */ inb(ioaddr + 12); | |
991 | up = inb(ioaddr + 13); | |
992 | ||
1da177e4 LT |
993 | EL3WINDOW(1); |
994 | } | |
995 | ||
996 | static int el3_rx(struct net_device *dev, int worklimit) | |
997 | { | |
906da809 | 998 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
999 | short rx_status; |
1000 | ||
dd0fab5b | 1001 | pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", |
1da177e4 LT |
1002 | dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); |
1003 | while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) && | |
b9bdcd9b RK |
1004 | worklimit > 0) { |
1005 | worklimit--; | |
1da177e4 LT |
1006 | if (rx_status & 0x4000) { /* Error, update stats. */ |
1007 | short error = rx_status & 0x3800; | |
2e8d31d5 | 1008 | dev->stats.rx_errors++; |
1da177e4 | 1009 | switch (error) { |
2e8d31d5 PZ |
1010 | case 0x0000: dev->stats.rx_over_errors++; break; |
1011 | case 0x0800: dev->stats.rx_length_errors++; break; | |
1012 | case 0x1000: dev->stats.rx_frame_errors++; break; | |
1013 | case 0x1800: dev->stats.rx_length_errors++; break; | |
1014 | case 0x2000: dev->stats.rx_frame_errors++; break; | |
1015 | case 0x2800: dev->stats.rx_crc_errors++; break; | |
1da177e4 LT |
1016 | } |
1017 | } else { | |
1018 | short pkt_len = rx_status & 0x7ff; | |
1019 | struct sk_buff *skb; | |
1020 | ||
1021 | skb = dev_alloc_skb(pkt_len+5); | |
1022 | ||
dd0fab5b | 1023 | pr_debug(" Receiving packet size %d status %4.4x.\n", |
1da177e4 LT |
1024 | pkt_len, rx_status); |
1025 | if (skb != NULL) { | |
1da177e4 LT |
1026 | skb_reserve(skb, 2); |
1027 | insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len), | |
1028 | ((pkt_len+3)>>2)); | |
1029 | skb->protocol = eth_type_trans(skb, dev); | |
1030 | netif_rx(skb); | |
2e8d31d5 PZ |
1031 | dev->stats.rx_packets++; |
1032 | dev->stats.rx_bytes += pkt_len; | |
1da177e4 | 1033 | } else { |
dd0fab5b | 1034 | pr_debug("%s: couldn't allocate a sk_buff of" |
1da177e4 | 1035 | " size %d.\n", dev->name, pkt_len); |
2e8d31d5 | 1036 | dev->stats.rx_dropped++; |
1da177e4 LT |
1037 | } |
1038 | } | |
1039 | tc574_wait_for_completion(dev, RxDiscard); | |
1040 | } | |
1041 | ||
1042 | return worklimit; | |
1043 | } | |
1044 | ||
1045 | static void netdev_get_drvinfo(struct net_device *dev, | |
1046 | struct ethtool_drvinfo *info) | |
1047 | { | |
1048 | strcpy(info->driver, "3c574_cs"); | |
1049 | } | |
1050 | ||
7282d491 | 1051 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
1052 | .get_drvinfo = netdev_get_drvinfo, |
1053 | }; | |
1054 | ||
1055 | /* Provide ioctl() calls to examine the MII xcvr state. */ | |
1056 | static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1057 | { | |
1058 | struct el3_private *lp = netdev_priv(dev); | |
906da809 | 1059 | unsigned int ioaddr = dev->base_addr; |
0fa0ee05 | 1060 | struct mii_ioctl_data *data = if_mii(rq); |
1da177e4 LT |
1061 | int phy = lp->phys & 0x1f; |
1062 | ||
dd0fab5b | 1063 | pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n", |
1da177e4 | 1064 | dev->name, rq->ifr_ifrn.ifrn_name, cmd, |
0fa0ee05 | 1065 | data->phy_id, data->reg_num, data->val_in, data->val_out); |
1da177e4 LT |
1066 | |
1067 | switch(cmd) { | |
1068 | case SIOCGMIIPHY: /* Get the address of the PHY in use. */ | |
0fa0ee05 | 1069 | data->phy_id = phy; |
1da177e4 LT |
1070 | case SIOCGMIIREG: /* Read the specified MII register. */ |
1071 | { | |
1072 | int saved_window; | |
1073 | unsigned long flags; | |
1074 | ||
1075 | spin_lock_irqsave(&lp->window_lock, flags); | |
1076 | saved_window = inw(ioaddr + EL3_CMD) >> 13; | |
1077 | EL3WINDOW(4); | |
0fa0ee05 BH |
1078 | data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, |
1079 | data->reg_num & 0x1f); | |
1da177e4 LT |
1080 | EL3WINDOW(saved_window); |
1081 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
1082 | return 0; | |
1083 | } | |
1084 | case SIOCSMIIREG: /* Write the specified MII register */ | |
1085 | { | |
1086 | int saved_window; | |
1087 | unsigned long flags; | |
1088 | ||
1da177e4 LT |
1089 | spin_lock_irqsave(&lp->window_lock, flags); |
1090 | saved_window = inw(ioaddr + EL3_CMD) >> 13; | |
1091 | EL3WINDOW(4); | |
0fa0ee05 BH |
1092 | mdio_write(ioaddr, data->phy_id & 0x1f, |
1093 | data->reg_num & 0x1f, data->val_in); | |
1da177e4 LT |
1094 | EL3WINDOW(saved_window); |
1095 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
1096 | return 0; | |
1097 | } | |
1098 | default: | |
1099 | return -EOPNOTSUPP; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | /* The Odie chip has a 64 bin multicast filter, but the bit layout is not | |
1104 | documented. Until it is we revert to receiving all multicast frames when | |
1105 | any multicast reception is desired. | |
1106 | Note: My other drivers emit a log message whenever promiscuous mode is | |
1107 | entered to help detect password sniffers. This is less desirable on | |
1108 | typical PC card machines, so we omit the message. | |
1109 | */ | |
1110 | ||
1111 | static void set_rx_mode(struct net_device *dev) | |
1112 | { | |
906da809 | 1113 | unsigned int ioaddr = dev->base_addr; |
1da177e4 LT |
1114 | |
1115 | if (dev->flags & IFF_PROMISC) | |
1116 | outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm, | |
1117 | ioaddr + EL3_CMD); | |
4cd24eaf | 1118 | else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) |
1da177e4 LT |
1119 | outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD); |
1120 | else | |
1121 | outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); | |
1122 | } | |
1123 | ||
e3eef534 KK |
1124 | static void set_multicast_list(struct net_device *dev) |
1125 | { | |
1126 | struct el3_private *lp = netdev_priv(dev); | |
1127 | unsigned long flags; | |
1128 | ||
1129 | spin_lock_irqsave(&lp->window_lock, flags); | |
1130 | set_rx_mode(dev); | |
1131 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
1132 | } | |
1133 | ||
1da177e4 LT |
1134 | static int el3_close(struct net_device *dev) |
1135 | { | |
906da809 | 1136 | unsigned int ioaddr = dev->base_addr; |
1da177e4 | 1137 | struct el3_private *lp = netdev_priv(dev); |
fba395ee | 1138 | struct pcmcia_device *link = lp->p_dev; |
1da177e4 | 1139 | |
dd0fab5b | 1140 | dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name); |
1da177e4 | 1141 | |
9940ec36 | 1142 | if (pcmcia_dev_present(link)) { |
1da177e4 LT |
1143 | unsigned long flags; |
1144 | ||
1145 | /* Turn off statistics ASAP. We update lp->stats below. */ | |
1146 | outw(StatsDisable, ioaddr + EL3_CMD); | |
1147 | ||
1148 | /* Disable the receiver and transmitter. */ | |
1149 | outw(RxDisable, ioaddr + EL3_CMD); | |
1150 | outw(TxDisable, ioaddr + EL3_CMD); | |
1151 | ||
1152 | /* Note: Switching to window 0 may disable the IRQ. */ | |
1153 | EL3WINDOW(0); | |
1154 | spin_lock_irqsave(&lp->window_lock, flags); | |
1155 | update_stats(dev); | |
1156 | spin_unlock_irqrestore(&lp->window_lock, flags); | |
b9a6eaff DR |
1157 | |
1158 | /* force interrupts off */ | |
1159 | outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD); | |
1da177e4 LT |
1160 | } |
1161 | ||
1162 | link->open--; | |
1163 | netif_stop_queue(dev); | |
1164 | del_timer_sync(&lp->media); | |
1165 | ||
1166 | return 0; | |
1167 | } | |
1168 | ||
270b6e94 DB |
1169 | static struct pcmcia_device_id tc574_ids[] = { |
1170 | PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574), | |
f0a3a153 | 1171 | PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"), |
270b6e94 DB |
1172 | PCMCIA_DEVICE_NULL, |
1173 | }; | |
1174 | MODULE_DEVICE_TABLE(pcmcia, tc574_ids); | |
1175 | ||
1da177e4 LT |
1176 | static struct pcmcia_driver tc574_driver = { |
1177 | .owner = THIS_MODULE, | |
2e9b981a | 1178 | .name = "3c574_cs", |
15b99ac1 | 1179 | .probe = tc574_probe, |
cc3b4866 | 1180 | .remove = tc574_detach, |
270b6e94 | 1181 | .id_table = tc574_ids, |
98e4c28b DB |
1182 | .suspend = tc574_suspend, |
1183 | .resume = tc574_resume, | |
1da177e4 LT |
1184 | }; |
1185 | ||
1186 | static int __init init_tc574(void) | |
1187 | { | |
1188 | return pcmcia_register_driver(&tc574_driver); | |
1189 | } | |
1190 | ||
1191 | static void __exit exit_tc574(void) | |
1192 | { | |
1193 | pcmcia_unregister_driver(&tc574_driver); | |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | module_init(init_tc574); | |
1197 | module_exit(exit_tc574); |