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1 | /*====================================================================== |
2 | ||
3 | A PCMCIA ethernet driver for Asix AX88190-based cards | |
4 | ||
5 | The Asix AX88190 is a NS8390-derived chipset with a few nasty | |
6 | idiosyncracies that make it very inconvenient to support with a | |
7 | standard 8390 driver. This driver is based on pcnet_cs, with the | |
8 | tweaked 8390 code grafted on the end. Much of what I did was to | |
9 | clean up and update a similar driver supplied by Asix, which was | |
10 | adapted by William Lee, william@asix.com.tw. | |
11 | ||
12 | Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net | |
13 | ||
14 | axnet_cs.c 1.28 2002/06/29 06:27:37 | |
15 | ||
16 | The network driver code is based on Donald Becker's NE2000 code: | |
17 | ||
18 | Written 1992,1993 by Donald Becker. | |
19 | Copyright 1993 United States Government as represented by the | |
20 | Director, National Security Agency. This software may be used and | |
21 | distributed according to the terms of the GNU General Public License, | |
22 | incorporated herein by reference. | |
23 | Donald Becker may be reached at becker@scyld.com | |
24 | ||
25 | ======================================================================*/ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/ptrace.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/ethtool.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include "../8390.h" | |
39 | ||
40 | #include <pcmcia/version.h> | |
41 | #include <pcmcia/cs_types.h> | |
42 | #include <pcmcia/cs.h> | |
43 | #include <pcmcia/cistpl.h> | |
44 | #include <pcmcia/ciscode.h> | |
45 | #include <pcmcia/ds.h> | |
46 | #include <pcmcia/cisreg.h> | |
47 | ||
48 | #include <asm/io.h> | |
49 | #include <asm/system.h> | |
50 | #include <asm/byteorder.h> | |
51 | #include <asm/uaccess.h> | |
52 | ||
53 | #define AXNET_CMD 0x00 | |
54 | #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */ | |
55 | #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */ | |
56 | #define AXNET_MII_EEP 0x14 /* Offset of MII access port */ | |
57 | #define AXNET_TEST 0x15 /* Offset of TEST Register port */ | |
58 | #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */ | |
59 | ||
60 | #define AXNET_START_PG 0x40 /* First page of TX buffer */ | |
61 | #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */ | |
62 | ||
63 | #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */ | |
64 | ||
65 | #define IS_AX88190 0x0001 | |
66 | #define IS_AX88790 0x0002 | |
67 | ||
68 | /*====================================================================*/ | |
69 | ||
70 | /* Module parameters */ | |
71 | ||
72 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
73 | MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver"); | |
74 | MODULE_LICENSE("GPL"); | |
75 | ||
76 | #ifdef PCMCIA_DEBUG | |
77 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) | |
78 | ||
79 | INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); | |
80 | #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) | |
81 | static char *version = | |
82 | "axnet_cs.c 1.28 2002/06/29 06:27:37 (David Hinds)"; | |
83 | #else | |
84 | #define DEBUG(n, args...) | |
85 | #endif | |
86 | ||
87 | /*====================================================================*/ | |
88 | ||
89 | static void axnet_config(dev_link_t *link); | |
90 | static void axnet_release(dev_link_t *link); | |
91 | static int axnet_event(event_t event, int priority, | |
92 | event_callback_args_t *args); | |
93 | static int axnet_open(struct net_device *dev); | |
94 | static int axnet_close(struct net_device *dev); | |
95 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
96 | static struct ethtool_ops netdev_ethtool_ops; | |
97 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs); | |
98 | static void ei_watchdog(u_long arg); | |
99 | static void axnet_reset_8390(struct net_device *dev); | |
100 | ||
101 | static int mdio_read(kio_addr_t addr, int phy_id, int loc); | |
102 | static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value); | |
103 | ||
104 | static void get_8390_hdr(struct net_device *, | |
105 | struct e8390_pkt_hdr *, int); | |
106 | static void block_input(struct net_device *dev, int count, | |
107 | struct sk_buff *skb, int ring_offset); | |
108 | static void block_output(struct net_device *dev, int count, | |
109 | const u_char *buf, const int start_page); | |
110 | ||
111 | static dev_link_t *axnet_attach(void); | |
112 | static void axnet_detach(dev_link_t *); | |
113 | ||
114 | static dev_info_t dev_info = "axnet_cs"; | |
115 | static dev_link_t *dev_list; | |
116 | ||
117 | static void axdev_setup(struct net_device *dev); | |
118 | static void AX88190_init(struct net_device *dev, int startp); | |
119 | static int ax_open(struct net_device *dev); | |
120 | static int ax_close(struct net_device *dev); | |
121 | static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
122 | ||
123 | /*====================================================================*/ | |
124 | ||
125 | typedef struct axnet_dev_t { | |
126 | dev_link_t link; | |
127 | dev_node_t node; | |
128 | caddr_t base; | |
129 | struct timer_list watchdog; | |
130 | int stale, fast_poll; | |
131 | u_short link_status; | |
132 | u_char duplex_flag; | |
133 | int phy_id; | |
134 | int flags; | |
135 | } axnet_dev_t; | |
136 | ||
137 | static inline axnet_dev_t *PRIV(struct net_device *dev) | |
138 | { | |
139 | void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device); | |
140 | return p; | |
141 | } | |
142 | ||
143 | /*====================================================================== | |
144 | ||
145 | axnet_attach() creates an "instance" of the driver, allocating | |
146 | local data structures for one device. The device is registered | |
147 | with Card Services. | |
148 | ||
149 | ======================================================================*/ | |
150 | ||
151 | static dev_link_t *axnet_attach(void) | |
152 | { | |
153 | axnet_dev_t *info; | |
154 | dev_link_t *link; | |
155 | struct net_device *dev; | |
156 | client_reg_t client_reg; | |
157 | int ret; | |
158 | ||
159 | DEBUG(0, "axnet_attach()\n"); | |
160 | ||
161 | dev = alloc_netdev(sizeof(struct ei_device) + sizeof(axnet_dev_t), | |
162 | "eth%d", axdev_setup); | |
163 | ||
164 | if (!dev) | |
165 | return NULL; | |
166 | ||
167 | info = PRIV(dev); | |
168 | link = &info->link; | |
169 | link->priv = dev; | |
170 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; | |
171 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; | |
172 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
173 | link->conf.IntType = INT_MEMORY_AND_IO; | |
174 | ||
175 | dev->open = &axnet_open; | |
176 | dev->stop = &axnet_close; | |
177 | dev->do_ioctl = &axnet_ioctl; | |
178 | SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); | |
179 | ||
180 | /* Register with Card Services */ | |
181 | link->next = dev_list; | |
182 | dev_list = link; | |
183 | client_reg.dev_info = &dev_info; | |
184 | client_reg.EventMask = | |
185 | CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | | |
186 | CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | | |
187 | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; | |
188 | client_reg.event_handler = &axnet_event; | |
189 | client_reg.Version = 0x0210; | |
190 | client_reg.event_callback_args.client_data = link; | |
191 | ret = pcmcia_register_client(&link->handle, &client_reg); | |
192 | if (ret != CS_SUCCESS) { | |
193 | cs_error(link->handle, RegisterClient, ret); | |
194 | axnet_detach(link); | |
195 | return NULL; | |
196 | } | |
197 | ||
198 | return link; | |
199 | } /* axnet_attach */ | |
200 | ||
201 | /*====================================================================== | |
202 | ||
203 | This deletes a driver "instance". The device is de-registered | |
204 | with Card Services. If it has been released, all local data | |
205 | structures are freed. Otherwise, the structures will be freed | |
206 | when the device is released. | |
207 | ||
208 | ======================================================================*/ | |
209 | ||
210 | static void axnet_detach(dev_link_t *link) | |
211 | { | |
212 | struct net_device *dev = link->priv; | |
213 | dev_link_t **linkp; | |
214 | ||
215 | DEBUG(0, "axnet_detach(0x%p)\n", link); | |
216 | ||
217 | /* Locate device structure */ | |
218 | for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) | |
219 | if (*linkp == link) break; | |
220 | if (*linkp == NULL) | |
221 | return; | |
222 | ||
223 | if (link->dev) | |
224 | unregister_netdev(dev); | |
225 | ||
226 | if (link->state & DEV_CONFIG) | |
227 | axnet_release(link); | |
228 | ||
229 | if (link->handle) | |
230 | pcmcia_deregister_client(link->handle); | |
231 | ||
232 | /* Unlink device structure, free bits */ | |
233 | *linkp = link->next; | |
234 | free_netdev(dev); | |
235 | } /* axnet_detach */ | |
236 | ||
237 | /*====================================================================== | |
238 | ||
239 | This probes for a card's hardware address by reading the PROM. | |
240 | ||
241 | ======================================================================*/ | |
242 | ||
243 | static int get_prom(dev_link_t *link) | |
244 | { | |
245 | struct net_device *dev = link->priv; | |
246 | kio_addr_t ioaddr = dev->base_addr; | |
247 | int i, j; | |
248 | ||
249 | /* This is based on drivers/net/ne.c */ | |
250 | struct { | |
251 | u_char value, offset; | |
252 | } program_seq[] = { | |
253 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ | |
254 | {0x01, EN0_DCFG}, /* Set word-wide access. */ | |
255 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ | |
256 | {0x00, EN0_RCNTHI}, | |
257 | {0x00, EN0_IMR}, /* Mask completion irq. */ | |
258 | {0xFF, EN0_ISR}, | |
259 | {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */ | |
260 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ | |
261 | {0x10, EN0_RCNTLO}, | |
262 | {0x00, EN0_RCNTHI}, | |
263 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */ | |
264 | {0x04, EN0_RSARHI}, | |
265 | {E8390_RREAD+E8390_START, E8390_CMD}, | |
266 | }; | |
267 | ||
268 | /* Not much of a test, but the alternatives are messy */ | |
269 | if (link->conf.ConfigBase != 0x03c0) | |
270 | return 0; | |
271 | ||
272 | axnet_reset_8390(dev); | |
273 | mdelay(10); | |
274 | ||
275 | for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) | |
276 | outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); | |
277 | ||
278 | for (i = 0; i < 6; i += 2) { | |
279 | j = inw(ioaddr + AXNET_DATAPORT); | |
280 | dev->dev_addr[i] = j & 0xff; | |
281 | dev->dev_addr[i+1] = j >> 8; | |
282 | } | |
283 | return 1; | |
284 | } /* get_prom */ | |
285 | ||
286 | /*====================================================================== | |
287 | ||
288 | axnet_config() is scheduled to run after a CARD_INSERTION event | |
289 | is received, to configure the PCMCIA socket, and to make the | |
290 | ethernet device available to the system. | |
291 | ||
292 | ======================================================================*/ | |
293 | ||
294 | #define CS_CHECK(fn, ret) \ | |
295 | do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) | |
296 | ||
297 | static int try_io_port(dev_link_t *link) | |
298 | { | |
299 | int j, ret; | |
300 | if (link->io.NumPorts1 == 32) { | |
301 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
302 | if (link->io.NumPorts2 > 0) { | |
303 | /* for master/slave multifunction cards */ | |
304 | link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; | |
305 | link->irq.Attributes = | |
306 | IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED; | |
307 | } | |
308 | } else { | |
309 | /* This should be two 16-port windows */ | |
310 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
311 | link->io.Attributes2 = IO_DATA_PATH_WIDTH_16; | |
312 | } | |
313 | if (link->io.BasePort1 == 0) { | |
314 | link->io.IOAddrLines = 16; | |
315 | for (j = 0; j < 0x400; j += 0x20) { | |
316 | link->io.BasePort1 = j ^ 0x300; | |
317 | link->io.BasePort2 = (j ^ 0x300) + 0x10; | |
318 | ret = pcmcia_request_io(link->handle, &link->io); | |
319 | if (ret == CS_SUCCESS) return ret; | |
320 | } | |
321 | return ret; | |
322 | } else { | |
323 | return pcmcia_request_io(link->handle, &link->io); | |
324 | } | |
325 | } | |
326 | ||
327 | static void axnet_config(dev_link_t *link) | |
328 | { | |
329 | client_handle_t handle = link->handle; | |
330 | struct net_device *dev = link->priv; | |
331 | axnet_dev_t *info = PRIV(dev); | |
332 | tuple_t tuple; | |
333 | cisparse_t parse; | |
334 | int i, j, last_ret, last_fn; | |
335 | u_short buf[64]; | |
336 | config_info_t conf; | |
337 | ||
338 | DEBUG(0, "axnet_config(0x%p)\n", link); | |
339 | ||
340 | tuple.Attributes = 0; | |
341 | tuple.TupleData = (cisdata_t *)buf; | |
342 | tuple.TupleDataMax = sizeof(buf); | |
343 | tuple.TupleOffset = 0; | |
344 | tuple.DesiredTuple = CISTPL_CONFIG; | |
345 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
346 | CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); | |
347 | CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); | |
348 | link->conf.ConfigBase = parse.config.base; | |
349 | /* don't trust the CIS on this; Linksys got it wrong */ | |
350 | link->conf.Present = 0x63; | |
351 | ||
352 | /* Configure card */ | |
353 | link->state |= DEV_CONFIG; | |
354 | ||
355 | /* Look up current Vcc */ | |
356 | CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); | |
357 | link->conf.Vcc = conf.Vcc; | |
358 | ||
359 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; | |
360 | tuple.Attributes = 0; | |
361 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
362 | while (last_ret == CS_SUCCESS) { | |
363 | cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); | |
364 | cistpl_io_t *io = &(parse.cftable_entry.io); | |
365 | ||
366 | if (pcmcia_get_tuple_data(handle, &tuple) != 0 || | |
367 | pcmcia_parse_tuple(handle, &tuple, &parse) != 0 || | |
368 | cfg->index == 0 || cfg->io.nwin == 0) | |
369 | goto next_entry; | |
370 | ||
371 | link->conf.ConfigIndex = 0x05; | |
372 | /* For multifunction cards, by convention, we configure the | |
373 | network function with window 0, and serial with window 1 */ | |
374 | if (io->nwin > 1) { | |
375 | i = (io->win[1].len > io->win[0].len); | |
376 | link->io.BasePort2 = io->win[1-i].base; | |
377 | link->io.NumPorts2 = io->win[1-i].len; | |
378 | } else { | |
379 | i = link->io.NumPorts2 = 0; | |
380 | } | |
381 | link->io.BasePort1 = io->win[i].base; | |
382 | link->io.NumPorts1 = io->win[i].len; | |
383 | link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
384 | if (link->io.NumPorts1 + link->io.NumPorts2 >= 32) { | |
385 | last_ret = try_io_port(link); | |
386 | if (last_ret == CS_SUCCESS) break; | |
387 | } | |
388 | next_entry: | |
389 | last_ret = pcmcia_get_next_tuple(handle, &tuple); | |
390 | } | |
391 | if (last_ret != CS_SUCCESS) { | |
392 | cs_error(handle, RequestIO, last_ret); | |
393 | goto failed; | |
394 | } | |
395 | ||
396 | CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq)); | |
397 | ||
398 | if (link->io.NumPorts2 == 8) { | |
399 | link->conf.Attributes |= CONF_ENABLE_SPKR; | |
400 | link->conf.Status = CCSR_AUDIO_ENA; | |
401 | } | |
402 | ||
403 | CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf)); | |
404 | dev->irq = link->irq.AssignedIRQ; | |
405 | dev->base_addr = link->io.BasePort1; | |
406 | ||
407 | if (!get_prom(link)) { | |
408 | printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n"); | |
409 | printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n"); | |
410 | goto failed; | |
411 | } | |
412 | ||
413 | ei_status.name = "AX88190"; | |
414 | ei_status.word16 = 1; | |
415 | ei_status.tx_start_page = AXNET_START_PG; | |
416 | ei_status.rx_start_page = AXNET_START_PG + TX_PAGES; | |
417 | ei_status.stop_page = AXNET_STOP_PG; | |
418 | ei_status.reset_8390 = &axnet_reset_8390; | |
419 | ei_status.get_8390_hdr = &get_8390_hdr; | |
420 | ei_status.block_input = &block_input; | |
421 | ei_status.block_output = &block_output; | |
422 | ||
423 | if (inb(dev->base_addr + AXNET_TEST) != 0) | |
424 | info->flags |= IS_AX88790; | |
425 | else | |
426 | info->flags |= IS_AX88190; | |
427 | ||
428 | if (info->flags & IS_AX88790) | |
429 | outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */ | |
430 | ||
431 | for (i = 0; i < 32; i++) { | |
432 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
433 | if ((j != 0) && (j != 0xffff)) break; | |
434 | } | |
435 | ||
436 | /* Maybe PHY is in power down mode. (PPD_SET = 1) | |
437 | Bit 2 of CCSR is active low. */ | |
438 | if (i == 32) { | |
439 | conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 }; | |
440 | pcmcia_access_configuration_register(link->handle, ®); | |
441 | for (i = 0; i < 32; i++) { | |
442 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
443 | if ((j != 0) && (j != 0xffff)) break; | |
444 | } | |
445 | } | |
446 | ||
447 | info->phy_id = (i < 32) ? i : -1; | |
448 | link->dev = &info->node; | |
449 | link->state &= ~DEV_CONFIG_PENDING; | |
450 | SET_NETDEV_DEV(dev, &handle_to_dev(handle)); | |
451 | ||
452 | if (register_netdev(dev) != 0) { | |
453 | printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n"); | |
454 | link->dev = NULL; | |
455 | goto failed; | |
456 | } | |
457 | ||
458 | strcpy(info->node.dev_name, dev->name); | |
459 | ||
460 | printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, hw_addr ", | |
461 | dev->name, ((info->flags & IS_AX88790) ? 7 : 1), | |
462 | dev->base_addr, dev->irq); | |
463 | for (i = 0; i < 6; i++) | |
464 | printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n")); | |
465 | if (info->phy_id != -1) { | |
466 | DEBUG(0, " MII transceiver at index %d, status %x.\n", info->phy_id, j); | |
467 | } else { | |
468 | printk(KERN_NOTICE " No MII transceivers found!\n"); | |
469 | } | |
470 | return; | |
471 | ||
472 | cs_failed: | |
473 | cs_error(link->handle, last_fn, last_ret); | |
474 | failed: | |
475 | axnet_release(link); | |
476 | link->state &= ~DEV_CONFIG_PENDING; | |
477 | return; | |
478 | } /* axnet_config */ | |
479 | ||
480 | /*====================================================================== | |
481 | ||
482 | After a card is removed, axnet_release() will unregister the net | |
483 | device, and release the PCMCIA configuration. If the device is | |
484 | still open, this will be postponed until it is closed. | |
485 | ||
486 | ======================================================================*/ | |
487 | ||
488 | static void axnet_release(dev_link_t *link) | |
489 | { | |
490 | DEBUG(0, "axnet_release(0x%p)\n", link); | |
491 | ||
492 | pcmcia_release_configuration(link->handle); | |
493 | pcmcia_release_io(link->handle, &link->io); | |
494 | pcmcia_release_irq(link->handle, &link->irq); | |
495 | ||
496 | link->state &= ~DEV_CONFIG; | |
497 | } | |
498 | ||
499 | /*====================================================================== | |
500 | ||
501 | The card status event handler. Mostly, this schedules other | |
502 | stuff to run after an event is received. A CARD_REMOVAL event | |
503 | also sets some flags to discourage the net drivers from trying | |
504 | to talk to the card any more. | |
505 | ||
506 | ======================================================================*/ | |
507 | ||
508 | static int axnet_event(event_t event, int priority, | |
509 | event_callback_args_t *args) | |
510 | { | |
511 | dev_link_t *link = args->client_data; | |
512 | struct net_device *dev = link->priv; | |
513 | ||
514 | DEBUG(2, "axnet_event(0x%06x)\n", event); | |
515 | ||
516 | switch (event) { | |
517 | case CS_EVENT_CARD_REMOVAL: | |
518 | link->state &= ~DEV_PRESENT; | |
519 | if (link->state & DEV_CONFIG) | |
520 | netif_device_detach(dev); | |
521 | break; | |
522 | case CS_EVENT_CARD_INSERTION: | |
523 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; | |
524 | axnet_config(link); | |
525 | break; | |
526 | case CS_EVENT_PM_SUSPEND: | |
527 | link->state |= DEV_SUSPEND; | |
528 | /* Fall through... */ | |
529 | case CS_EVENT_RESET_PHYSICAL: | |
530 | if (link->state & DEV_CONFIG) { | |
531 | if (link->open) | |
532 | netif_device_detach(dev); | |
533 | pcmcia_release_configuration(link->handle); | |
534 | } | |
535 | break; | |
536 | case CS_EVENT_PM_RESUME: | |
537 | link->state &= ~DEV_SUSPEND; | |
538 | /* Fall through... */ | |
539 | case CS_EVENT_CARD_RESET: | |
540 | if (link->state & DEV_CONFIG) { | |
541 | pcmcia_request_configuration(link->handle, &link->conf); | |
542 | if (link->open) { | |
543 | axnet_reset_8390(dev); | |
544 | AX88190_init(dev, 1); | |
545 | netif_device_attach(dev); | |
546 | } | |
547 | } | |
548 | break; | |
549 | } | |
550 | return 0; | |
551 | } /* axnet_event */ | |
552 | ||
553 | /*====================================================================== | |
554 | ||
555 | MII interface support | |
556 | ||
557 | ======================================================================*/ | |
558 | ||
559 | #define MDIO_SHIFT_CLK 0x01 | |
560 | #define MDIO_DATA_WRITE0 0x00 | |
561 | #define MDIO_DATA_WRITE1 0x08 | |
562 | #define MDIO_DATA_READ 0x04 | |
563 | #define MDIO_MASK 0x0f | |
564 | #define MDIO_ENB_IN 0x02 | |
565 | ||
566 | static void mdio_sync(kio_addr_t addr) | |
567 | { | |
568 | int bits; | |
569 | for (bits = 0; bits < 32; bits++) { | |
570 | outb_p(MDIO_DATA_WRITE1, addr); | |
571 | outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr); | |
572 | } | |
573 | } | |
574 | ||
575 | static int mdio_read(kio_addr_t addr, int phy_id, int loc) | |
576 | { | |
577 | u_int cmd = (0xf6<<10)|(phy_id<<5)|loc; | |
578 | int i, retval = 0; | |
579 | ||
580 | mdio_sync(addr); | |
581 | for (i = 14; i >= 0; i--) { | |
582 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
583 | outb_p(dat, addr); | |
584 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
585 | } | |
586 | for (i = 19; i > 0; i--) { | |
587 | outb_p(MDIO_ENB_IN, addr); | |
588 | retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0); | |
589 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
590 | } | |
591 | return (retval>>1) & 0xffff; | |
592 | } | |
593 | ||
594 | static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value) | |
595 | { | |
596 | u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value; | |
597 | int i; | |
598 | ||
599 | mdio_sync(addr); | |
600 | for (i = 31; i >= 0; i--) { | |
601 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
602 | outb_p(dat, addr); | |
603 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
604 | } | |
605 | for (i = 1; i >= 0; i--) { | |
606 | outb_p(MDIO_ENB_IN, addr); | |
607 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
608 | } | |
609 | } | |
610 | ||
611 | /*====================================================================*/ | |
612 | ||
613 | static int axnet_open(struct net_device *dev) | |
614 | { | |
615 | axnet_dev_t *info = PRIV(dev); | |
616 | dev_link_t *link = &info->link; | |
617 | ||
618 | DEBUG(2, "axnet_open('%s')\n", dev->name); | |
619 | ||
620 | if (!DEV_OK(link)) | |
621 | return -ENODEV; | |
622 | ||
623 | link->open++; | |
624 | ||
625 | request_irq(dev->irq, ei_irq_wrapper, SA_SHIRQ, dev_info, dev); | |
626 | ||
627 | info->link_status = 0x00; | |
628 | init_timer(&info->watchdog); | |
629 | info->watchdog.function = &ei_watchdog; | |
630 | info->watchdog.data = (u_long)dev; | |
631 | info->watchdog.expires = jiffies + HZ; | |
632 | add_timer(&info->watchdog); | |
633 | ||
634 | return ax_open(dev); | |
635 | } /* axnet_open */ | |
636 | ||
637 | /*====================================================================*/ | |
638 | ||
639 | static int axnet_close(struct net_device *dev) | |
640 | { | |
641 | axnet_dev_t *info = PRIV(dev); | |
642 | dev_link_t *link = &info->link; | |
643 | ||
644 | DEBUG(2, "axnet_close('%s')\n", dev->name); | |
645 | ||
646 | ax_close(dev); | |
647 | free_irq(dev->irq, dev); | |
648 | ||
649 | link->open--; | |
650 | netif_stop_queue(dev); | |
651 | del_timer_sync(&info->watchdog); | |
652 | ||
653 | return 0; | |
654 | } /* axnet_close */ | |
655 | ||
656 | /*====================================================================== | |
657 | ||
658 | Hard reset the card. This used to pause for the same period that | |
659 | a 8390 reset command required, but that shouldn't be necessary. | |
660 | ||
661 | ======================================================================*/ | |
662 | ||
663 | static void axnet_reset_8390(struct net_device *dev) | |
664 | { | |
665 | kio_addr_t nic_base = dev->base_addr; | |
666 | int i; | |
667 | ||
668 | ei_status.txing = ei_status.dmaing = 0; | |
669 | ||
670 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD); | |
671 | ||
672 | outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET); | |
673 | ||
674 | for (i = 0; i < 100; i++) { | |
675 | if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0) | |
676 | break; | |
677 | udelay(100); | |
678 | } | |
679 | outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */ | |
680 | ||
681 | if (i == 100) | |
682 | printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n", | |
683 | dev->name); | |
684 | ||
685 | } /* axnet_reset_8390 */ | |
686 | ||
687 | /*====================================================================*/ | |
688 | ||
689 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs) | |
690 | { | |
691 | struct net_device *dev = dev_id; | |
692 | PRIV(dev)->stale = 0; | |
693 | return ax_interrupt(irq, dev_id, regs); | |
694 | } | |
695 | ||
696 | static void ei_watchdog(u_long arg) | |
697 | { | |
698 | struct net_device *dev = (struct net_device *)(arg); | |
699 | axnet_dev_t *info = PRIV(dev); | |
700 | kio_addr_t nic_base = dev->base_addr; | |
701 | kio_addr_t mii_addr = nic_base + AXNET_MII_EEP; | |
702 | u_short link; | |
703 | ||
704 | if (!netif_device_present(dev)) goto reschedule; | |
705 | ||
706 | /* Check for pending interrupt with expired latency timer: with | |
707 | this, we can limp along even if the interrupt is blocked */ | |
708 | if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) { | |
709 | if (!info->fast_poll) | |
710 | printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); | |
711 | ei_irq_wrapper(dev->irq, dev, NULL); | |
712 | info->fast_poll = HZ; | |
713 | } | |
714 | if (info->fast_poll) { | |
715 | info->fast_poll--; | |
716 | info->watchdog.expires = jiffies + 1; | |
717 | add_timer(&info->watchdog); | |
718 | return; | |
719 | } | |
720 | ||
721 | if (info->phy_id < 0) | |
722 | goto reschedule; | |
723 | link = mdio_read(mii_addr, info->phy_id, 1); | |
724 | if (!link || (link == 0xffff)) { | |
725 | printk(KERN_INFO "%s: MII is missing!\n", dev->name); | |
726 | info->phy_id = -1; | |
727 | goto reschedule; | |
728 | } | |
729 | ||
730 | link &= 0x0004; | |
731 | if (link != info->link_status) { | |
732 | u_short p = mdio_read(mii_addr, info->phy_id, 5); | |
733 | printk(KERN_INFO "%s: %s link beat\n", dev->name, | |
734 | (link) ? "found" : "lost"); | |
735 | if (link) { | |
736 | info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00; | |
737 | if (p) | |
738 | printk(KERN_INFO "%s: autonegotiation complete: " | |
739 | "%sbaseT-%cD selected\n", dev->name, | |
740 | ((p & 0x0180) ? "100" : "10"), | |
741 | ((p & 0x0140) ? 'F' : 'H')); | |
742 | else | |
743 | printk(KERN_INFO "%s: link partner did not autonegotiate\n", | |
744 | dev->name); | |
745 | AX88190_init(dev, 1); | |
746 | } | |
747 | info->link_status = link; | |
748 | } | |
749 | ||
750 | reschedule: | |
751 | info->watchdog.expires = jiffies + HZ; | |
752 | add_timer(&info->watchdog); | |
753 | } | |
754 | ||
755 | static void netdev_get_drvinfo(struct net_device *dev, | |
756 | struct ethtool_drvinfo *info) | |
757 | { | |
758 | strcpy(info->driver, "axnet_cs"); | |
759 | } | |
760 | ||
761 | static struct ethtool_ops netdev_ethtool_ops = { | |
762 | .get_drvinfo = netdev_get_drvinfo, | |
763 | }; | |
764 | ||
765 | /*====================================================================*/ | |
766 | ||
767 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
768 | { | |
769 | axnet_dev_t *info = PRIV(dev); | |
770 | u16 *data = (u16 *)&rq->ifr_ifru; | |
771 | kio_addr_t mii_addr = dev->base_addr + AXNET_MII_EEP; | |
772 | switch (cmd) { | |
773 | case SIOCGMIIPHY: | |
774 | data[0] = info->phy_id; | |
775 | case SIOCGMIIREG: /* Read MII PHY register. */ | |
776 | data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f); | |
777 | return 0; | |
778 | case SIOCSMIIREG: /* Write MII PHY register. */ | |
779 | if (!capable(CAP_NET_ADMIN)) | |
780 | return -EPERM; | |
781 | mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]); | |
782 | return 0; | |
783 | } | |
784 | return -EOPNOTSUPP; | |
785 | } | |
786 | ||
787 | /*====================================================================*/ | |
788 | ||
789 | static void get_8390_hdr(struct net_device *dev, | |
790 | struct e8390_pkt_hdr *hdr, | |
791 | int ring_page) | |
792 | { | |
793 | kio_addr_t nic_base = dev->base_addr; | |
794 | ||
795 | outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ | |
796 | outb_p(ring_page, nic_base + EN0_RSARHI); | |
797 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
798 | ||
799 | insw(nic_base + AXNET_DATAPORT, hdr, | |
800 | sizeof(struct e8390_pkt_hdr)>>1); | |
801 | /* Fix for big endian systems */ | |
802 | hdr->count = le16_to_cpu(hdr->count); | |
803 | ||
804 | } | |
805 | ||
806 | /*====================================================================*/ | |
807 | ||
808 | static void block_input(struct net_device *dev, int count, | |
809 | struct sk_buff *skb, int ring_offset) | |
810 | { | |
811 | kio_addr_t nic_base = dev->base_addr; | |
812 | int xfer_count = count; | |
813 | char *buf = skb->data; | |
814 | ||
815 | #ifdef PCMCIA_DEBUG | |
816 | if ((ei_debug > 4) && (count != 4)) | |
817 | printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4); | |
818 | #endif | |
819 | outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); | |
820 | outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); | |
821 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
822 | ||
823 | insw(nic_base + AXNET_DATAPORT,buf,count>>1); | |
824 | if (count & 0x01) | |
825 | buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++; | |
826 | ||
827 | } | |
828 | ||
829 | /*====================================================================*/ | |
830 | ||
831 | static void block_output(struct net_device *dev, int count, | |
832 | const u_char *buf, const int start_page) | |
833 | { | |
834 | kio_addr_t nic_base = dev->base_addr; | |
835 | ||
836 | #ifdef PCMCIA_DEBUG | |
837 | if (ei_debug > 4) | |
838 | printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count); | |
839 | #endif | |
840 | ||
841 | /* Round the count up for word writes. Do we need to do this? | |
842 | What effect will an odd byte count have on the 8390? | |
843 | I should check someday. */ | |
844 | if (count & 0x01) | |
845 | count++; | |
846 | ||
847 | outb_p(0x00, nic_base + EN0_RSARLO); | |
848 | outb_p(start_page, nic_base + EN0_RSARHI); | |
849 | outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD); | |
850 | outsw(nic_base + AXNET_DATAPORT, buf, count>>1); | |
851 | } | |
852 | ||
853 | static struct pcmcia_driver axnet_cs_driver = { | |
854 | .owner = THIS_MODULE, | |
855 | .drv = { | |
856 | .name = "axnet_cs", | |
857 | }, | |
858 | .attach = axnet_attach, | |
859 | .detach = axnet_detach, | |
860 | }; | |
861 | ||
862 | static int __init init_axnet_cs(void) | |
863 | { | |
864 | return pcmcia_register_driver(&axnet_cs_driver); | |
865 | } | |
866 | ||
867 | static void __exit exit_axnet_cs(void) | |
868 | { | |
869 | pcmcia_unregister_driver(&axnet_cs_driver); | |
870 | BUG_ON(dev_list != NULL); | |
871 | } | |
872 | ||
873 | module_init(init_axnet_cs); | |
874 | module_exit(exit_axnet_cs); | |
875 | ||
876 | /*====================================================================*/ | |
877 | ||
878 | /* 8390.c: A general NS8390 ethernet driver core for linux. */ | |
879 | /* | |
880 | Written 1992-94 by Donald Becker. | |
881 | ||
882 | Copyright 1993 United States Government as represented by the | |
883 | Director, National Security Agency. | |
884 | ||
885 | This software may be used and distributed according to the terms | |
886 | of the GNU General Public License, incorporated herein by reference. | |
887 | ||
888 | The author may be reached as becker@scyld.com, or C/O | |
889 | Scyld Computing Corporation | |
890 | 410 Severn Ave., Suite 210 | |
891 | Annapolis MD 21403 | |
892 | ||
893 | This is the chip-specific code for many 8390-based ethernet adaptors. | |
894 | This is not a complete driver, it must be combined with board-specific | |
895 | code such as ne.c, wd.c, 3c503.c, etc. | |
896 | ||
897 | Seeing how at least eight drivers use this code, (not counting the | |
898 | PCMCIA ones either) it is easy to break some card by what seems like | |
899 | a simple innocent change. Please contact me or Donald if you think | |
900 | you have found something that needs changing. -- PG | |
901 | ||
902 | Changelog: | |
903 | ||
904 | Paul Gortmaker : remove set_bit lock, other cleanups. | |
905 | Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to | |
906 | ei_block_input() for eth_io_copy_and_sum(). | |
907 | Paul Gortmaker : exchange static int ei_pingpong for a #define, | |
908 | also add better Tx error handling. | |
909 | Paul Gortmaker : rewrite Rx overrun handling as per NS specs. | |
910 | Alexey Kuznetsov : use the 8390's six bit hash multicast filter. | |
911 | Paul Gortmaker : tweak ANK's above multicast changes a bit. | |
912 | Paul Gortmaker : update packet statistics for v2.1.x | |
913 | Alan Cox : support arbitary stupid port mappings on the | |
914 | 68K Macintosh. Support >16bit I/O spaces | |
915 | Paul Gortmaker : add kmod support for auto-loading of the 8390 | |
916 | module by all drivers that require it. | |
917 | Alan Cox : Spinlocking work, added 'BUG_83C690' | |
918 | Paul Gortmaker : Separate out Tx timeout code from Tx path. | |
919 | ||
920 | Sources: | |
921 | The National Semiconductor LAN Databook, and the 3Com 3c503 databook. | |
922 | ||
923 | */ | |
924 | ||
925 | static const char *version_8390 = | |
926 | "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n"; | |
927 | ||
928 | #include <linux/bitops.h> | |
929 | #include <asm/irq.h> | |
930 | #include <linux/fcntl.h> | |
931 | #include <linux/in.h> | |
932 | #include <linux/interrupt.h> | |
933 | ||
934 | #include <linux/etherdevice.h> | |
935 | ||
936 | #define BUG_83C690 | |
937 | ||
938 | /* These are the operational function interfaces to board-specific | |
939 | routines. | |
940 | void reset_8390(struct net_device *dev) | |
941 | Resets the board associated with DEV, including a hardware reset of | |
942 | the 8390. This is only called when there is a transmit timeout, and | |
943 | it is always followed by 8390_init(). | |
944 | void block_output(struct net_device *dev, int count, const unsigned char *buf, | |
945 | int start_page) | |
946 | Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The | |
947 | "page" value uses the 8390's 256-byte pages. | |
948 | void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) | |
949 | Read the 4 byte, page aligned 8390 header. *If* there is a | |
950 | subsequent read, it will be of the rest of the packet. | |
951 | void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
952 | Read COUNT bytes from the packet buffer into the skb data area. Start | |
953 | reading from RING_OFFSET, the address as the 8390 sees it. This will always | |
954 | follow the read of the 8390 header. | |
955 | */ | |
956 | #define ei_reset_8390 (ei_local->reset_8390) | |
957 | #define ei_block_output (ei_local->block_output) | |
958 | #define ei_block_input (ei_local->block_input) | |
959 | #define ei_get_8390_hdr (ei_local->get_8390_hdr) | |
960 | ||
961 | /* use 0 for production, 1 for verification, >2 for debug */ | |
962 | #ifndef ei_debug | |
963 | int ei_debug = 1; | |
964 | #endif | |
965 | ||
966 | /* Index to functions. */ | |
967 | static void ei_tx_intr(struct net_device *dev); | |
968 | static void ei_tx_err(struct net_device *dev); | |
969 | static void ei_tx_timeout(struct net_device *dev); | |
970 | static void ei_receive(struct net_device *dev); | |
971 | static void ei_rx_overrun(struct net_device *dev); | |
972 | ||
973 | /* Routines generic to NS8390-based boards. */ | |
974 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
975 | int start_page); | |
976 | static void set_multicast_list(struct net_device *dev); | |
977 | static void do_set_multicast_list(struct net_device *dev); | |
978 | ||
979 | /* | |
980 | * SMP and the 8390 setup. | |
981 | * | |
982 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is | |
983 | * a page register that controls bank and packet buffer access. We guard | |
984 | * this with ei_local->page_lock. Nobody should assume or set the page other | |
985 | * than zero when the lock is not held. Lock holders must restore page 0 | |
986 | * before unlocking. Even pure readers must take the lock to protect in | |
987 | * page 0. | |
988 | * | |
989 | * To make life difficult the chip can also be very slow. We therefore can't | |
990 | * just use spinlocks. For the longer lockups we disable the irq the device | |
991 | * sits on and hold the lock. We must hold the lock because there is a dual | |
992 | * processor case other than interrupts (get stats/set multicast list in | |
993 | * parallel with each other and transmit). | |
994 | * | |
995 | * Note: in theory we can just disable the irq on the card _but_ there is | |
996 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" | |
997 | * enter lock, take the queued irq. So we waddle instead of flying. | |
998 | * | |
999 | * Finally by special arrangement for the purpose of being generally | |
1000 | * annoying the transmit function is called bh atomic. That places | |
1001 | * restrictions on the user context callers as disable_irq won't save | |
1002 | * them. | |
1003 | */ | |
1004 | ||
1005 | /** | |
1006 | * ax_open - Open/initialize the board. | |
1007 | * @dev: network device to initialize | |
1008 | * | |
1009 | * This routine goes all-out, setting everything | |
1010 | * up anew at each open, even though many of these registers should only | |
1011 | * need to be set once at boot. | |
1012 | */ | |
1013 | static int ax_open(struct net_device *dev) | |
1014 | { | |
1015 | unsigned long flags; | |
1016 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1017 | ||
1018 | #ifdef HAVE_TX_TIMEOUT | |
1019 | /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout | |
1020 | wrapper that does e.g. media check & then calls ei_tx_timeout. */ | |
1021 | if (dev->tx_timeout == NULL) | |
1022 | dev->tx_timeout = ei_tx_timeout; | |
1023 | if (dev->watchdog_timeo <= 0) | |
1024 | dev->watchdog_timeo = TX_TIMEOUT; | |
1025 | #endif | |
1026 | ||
1027 | /* | |
1028 | * Grab the page lock so we own the register set, then call | |
1029 | * the init function. | |
1030 | */ | |
1031 | ||
1032 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1033 | AX88190_init(dev, 1); | |
1034 | /* Set the flag before we drop the lock, That way the IRQ arrives | |
1035 | after its set and we get no silly warnings */ | |
1036 | netif_start_queue(dev); | |
1037 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1038 | ei_local->irqlock = 0; | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) | |
1043 | ||
1044 | /** | |
1045 | * ax_close - shut down network device | |
1046 | * @dev: network device to close | |
1047 | * | |
1048 | * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. | |
1049 | */ | |
1050 | int ax_close(struct net_device *dev) | |
1051 | { | |
1052 | unsigned long flags; | |
1053 | ||
1054 | /* | |
1055 | * Hold the page lock during close | |
1056 | */ | |
1057 | ||
1058 | spin_lock_irqsave(&dev_lock(dev), flags); | |
1059 | AX88190_init(dev, 0); | |
1060 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
1061 | netif_stop_queue(dev); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | /** | |
1066 | * ei_tx_timeout - handle transmit time out condition | |
1067 | * @dev: network device which has apparently fallen asleep | |
1068 | * | |
1069 | * Called by kernel when device never acknowledges a transmit has | |
1070 | * completed (or failed) - i.e. never posted a Tx related interrupt. | |
1071 | */ | |
1072 | ||
1073 | void ei_tx_timeout(struct net_device *dev) | |
1074 | { | |
1075 | long e8390_base = dev->base_addr; | |
1076 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1077 | int txsr, isr, tickssofar = jiffies - dev->trans_start; | |
1078 | unsigned long flags; | |
1079 | ||
1080 | ei_local->stat.tx_errors++; | |
1081 | ||
1082 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1083 | txsr = inb(e8390_base+EN0_TSR); | |
1084 | isr = inb(e8390_base+EN0_ISR); | |
1085 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1086 | ||
1087 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", | |
1088 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : | |
1089 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); | |
1090 | ||
1091 | if (!isr && !ei_local->stat.tx_packets) | |
1092 | { | |
1093 | /* The 8390 probably hasn't gotten on the cable yet. */ | |
1094 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ | |
1095 | } | |
1096 | ||
1097 | /* Ugly but a reset can be slow, yet must be protected */ | |
1098 | ||
1099 | disable_irq_nosync(dev->irq); | |
1100 | spin_lock(&ei_local->page_lock); | |
1101 | ||
1102 | /* Try to restart the card. Perhaps the user has fixed something. */ | |
1103 | ei_reset_8390(dev); | |
1104 | AX88190_init(dev, 1); | |
1105 | ||
1106 | spin_unlock(&ei_local->page_lock); | |
1107 | enable_irq(dev->irq); | |
1108 | netif_wake_queue(dev); | |
1109 | } | |
1110 | ||
1111 | /** | |
1112 | * ei_start_xmit - begin packet transmission | |
1113 | * @skb: packet to be sent | |
1114 | * @dev: network device to which packet is sent | |
1115 | * | |
1116 | * Sends a packet to an 8390 network device. | |
1117 | */ | |
1118 | ||
1119 | static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1120 | { | |
1121 | long e8390_base = dev->base_addr; | |
1122 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1123 | int length, send_length, output_page; | |
1124 | unsigned long flags; | |
1125 | u8 packet[ETH_ZLEN]; | |
1126 | ||
1127 | netif_stop_queue(dev); | |
1128 | ||
1129 | length = skb->len; | |
1130 | ||
1131 | /* Mask interrupts from the ethercard. | |
1132 | SMP: We have to grab the lock here otherwise the IRQ handler | |
1133 | on another CPU can flip window and race the IRQ mask set. We end | |
1134 | up trashing the mcast filter not disabling irqs if we don't lock */ | |
1135 | ||
1136 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1137 | outb_p(0x00, e8390_base + EN0_IMR); | |
1138 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1139 | ||
1140 | /* | |
1141 | * Slow phase with lock held. | |
1142 | */ | |
1143 | ||
1144 | disable_irq_nosync(dev->irq); | |
1145 | ||
1146 | spin_lock(&ei_local->page_lock); | |
1147 | ||
1148 | ei_local->irqlock = 1; | |
1149 | ||
1150 | send_length = ETH_ZLEN < length ? length : ETH_ZLEN; | |
1151 | ||
1152 | /* | |
1153 | * We have two Tx slots available for use. Find the first free | |
1154 | * slot, and then perform some sanity checks. With two Tx bufs, | |
1155 | * you get very close to transmitting back-to-back packets. With | |
1156 | * only one Tx buf, the transmitter sits idle while you reload the | |
1157 | * card, leaving a substantial gap between each transmitted packet. | |
1158 | */ | |
1159 | ||
1160 | if (ei_local->tx1 == 0) | |
1161 | { | |
1162 | output_page = ei_local->tx_start_page; | |
1163 | ei_local->tx1 = send_length; | |
1164 | if (ei_debug && ei_local->tx2 > 0) | |
1165 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", | |
1166 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); | |
1167 | } | |
1168 | else if (ei_local->tx2 == 0) | |
1169 | { | |
1170 | output_page = ei_local->tx_start_page + TX_PAGES/2; | |
1171 | ei_local->tx2 = send_length; | |
1172 | if (ei_debug && ei_local->tx1 > 0) | |
1173 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", | |
1174 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); | |
1175 | } | |
1176 | else | |
1177 | { /* We should never get here. */ | |
1178 | if (ei_debug) | |
1179 | printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n", | |
1180 | dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx); | |
1181 | ei_local->irqlock = 0; | |
1182 | netif_stop_queue(dev); | |
1183 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1184 | spin_unlock(&ei_local->page_lock); | |
1185 | enable_irq(dev->irq); | |
1186 | ei_local->stat.tx_errors++; | |
1187 | return 1; | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | * Okay, now upload the packet and trigger a send if the transmitter | |
1192 | * isn't already sending. If it is busy, the interrupt handler will | |
1193 | * trigger the send later, upon receiving a Tx done interrupt. | |
1194 | */ | |
1195 | ||
1196 | if (length == skb->len) | |
1197 | ei_block_output(dev, length, skb->data, output_page); | |
1198 | else { | |
1199 | memset(packet, 0, ETH_ZLEN); | |
1200 | memcpy(packet, skb->data, skb->len); | |
1201 | ei_block_output(dev, length, packet, output_page); | |
1202 | } | |
1203 | ||
1204 | if (! ei_local->txing) | |
1205 | { | |
1206 | ei_local->txing = 1; | |
1207 | NS8390_trigger_send(dev, send_length, output_page); | |
1208 | dev->trans_start = jiffies; | |
1209 | if (output_page == ei_local->tx_start_page) | |
1210 | { | |
1211 | ei_local->tx1 = -1; | |
1212 | ei_local->lasttx = -1; | |
1213 | } | |
1214 | else | |
1215 | { | |
1216 | ei_local->tx2 = -1; | |
1217 | ei_local->lasttx = -2; | |
1218 | } | |
1219 | } | |
1220 | else ei_local->txqueue++; | |
1221 | ||
1222 | if (ei_local->tx1 && ei_local->tx2) | |
1223 | netif_stop_queue(dev); | |
1224 | else | |
1225 | netif_start_queue(dev); | |
1226 | ||
1227 | /* Turn 8390 interrupts back on. */ | |
1228 | ei_local->irqlock = 0; | |
1229 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1230 | ||
1231 | spin_unlock(&ei_local->page_lock); | |
1232 | enable_irq(dev->irq); | |
1233 | ||
1234 | dev_kfree_skb (skb); | |
1235 | ei_local->stat.tx_bytes += send_length; | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | /** | |
1241 | * ax_interrupt - handle the interrupts from an 8390 | |
1242 | * @irq: interrupt number | |
1243 | * @dev_id: a pointer to the net_device | |
1244 | * @regs: unused | |
1245 | * | |
1246 | * Handle the ether interface interrupts. We pull packets from | |
1247 | * the 8390 via the card specific functions and fire them at the networking | |
1248 | * stack. We also handle transmit completions and wake the transmit path if | |
1249 | * necessary. We also update the counters and do other housekeeping as | |
1250 | * needed. | |
1251 | */ | |
1252 | ||
1253 | static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs * regs) | |
1254 | { | |
1255 | struct net_device *dev = dev_id; | |
1256 | long e8390_base; | |
1257 | int interrupts, nr_serviced = 0, i; | |
1258 | struct ei_device *ei_local; | |
1259 | int handled = 0; | |
1260 | ||
1261 | if (dev == NULL) | |
1262 | { | |
1263 | printk ("net_interrupt(): irq %d for unknown device.\n", irq); | |
1264 | return IRQ_NONE; | |
1265 | } | |
1266 | ||
1267 | e8390_base = dev->base_addr; | |
1268 | ei_local = (struct ei_device *) netdev_priv(dev); | |
1269 | ||
1270 | /* | |
1271 | * Protect the irq test too. | |
1272 | */ | |
1273 | ||
1274 | spin_lock(&ei_local->page_lock); | |
1275 | ||
1276 | if (ei_local->irqlock) | |
1277 | { | |
1278 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ | |
1279 | /* The "irqlock" check is only for testing. */ | |
1280 | printk(ei_local->irqlock | |
1281 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" | |
1282 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", | |
1283 | dev->name, inb_p(e8390_base + EN0_ISR), | |
1284 | inb_p(e8390_base + EN0_IMR)); | |
1285 | #endif | |
1286 | spin_unlock(&ei_local->page_lock); | |
1287 | return IRQ_NONE; | |
1288 | } | |
1289 | ||
1290 | if (ei_debug > 3) | |
1291 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, | |
1292 | inb_p(e8390_base + EN0_ISR)); | |
1293 | ||
1294 | outb_p(0x00, e8390_base + EN0_ISR); | |
1295 | ei_local->irqlock = 1; | |
1296 | ||
1297 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ | |
1298 | while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 | |
1299 | && ++nr_serviced < MAX_SERVICE) | |
1300 | { | |
1301 | if (!netif_running(dev) || (interrupts == 0xff)) { | |
1302 | if (ei_debug > 1) | |
1303 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); | |
1304 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1305 | interrupts = 0; | |
1306 | break; | |
1307 | } | |
1308 | handled = 1; | |
1309 | ||
1310 | /* AX88190 bug fix. */ | |
1311 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1312 | for (i = 0; i < 10; i++) { | |
1313 | if (!(inb(e8390_base + EN0_ISR) & interrupts)) | |
1314 | break; | |
1315 | outb_p(0, e8390_base + EN0_ISR); | |
1316 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1317 | } | |
1318 | if (interrupts & ENISR_OVER) | |
1319 | ei_rx_overrun(dev); | |
1320 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) | |
1321 | { | |
1322 | /* Got a good (?) packet. */ | |
1323 | ei_receive(dev); | |
1324 | } | |
1325 | /* Push the next to-transmit packet through. */ | |
1326 | if (interrupts & ENISR_TX) | |
1327 | ei_tx_intr(dev); | |
1328 | else if (interrupts & ENISR_TX_ERR) | |
1329 | ei_tx_err(dev); | |
1330 | ||
1331 | if (interrupts & ENISR_COUNTERS) | |
1332 | { | |
1333 | ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); | |
1334 | ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); | |
1335 | ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | if (interrupts && ei_debug) | |
1340 | { | |
1341 | handled = 1; | |
1342 | if (nr_serviced >= MAX_SERVICE) | |
1343 | { | |
1344 | /* 0xFF is valid for a card removal */ | |
1345 | if(interrupts!=0xFF) | |
1346 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", | |
1347 | dev->name, interrupts); | |
1348 | outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ | |
1349 | } else { | |
1350 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); | |
1351 | outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | /* Turn 8390 interrupts back on. */ | |
1356 | ei_local->irqlock = 0; | |
1357 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1358 | ||
1359 | spin_unlock(&ei_local->page_lock); | |
1360 | return IRQ_RETVAL(handled); | |
1361 | } | |
1362 | ||
1363 | /** | |
1364 | * ei_tx_err - handle transmitter error | |
1365 | * @dev: network device which threw the exception | |
1366 | * | |
1367 | * A transmitter error has happened. Most likely excess collisions (which | |
1368 | * is a fairly normal condition). If the error is one where the Tx will | |
1369 | * have been aborted, we try and send another one right away, instead of | |
1370 | * letting the failed packet sit and collect dust in the Tx buffer. This | |
1371 | * is a much better solution as it avoids kernel based Tx timeouts, and | |
1372 | * an unnecessary card reset. | |
1373 | * | |
1374 | * Called with lock held. | |
1375 | */ | |
1376 | ||
1377 | static void ei_tx_err(struct net_device *dev) | |
1378 | { | |
1379 | long e8390_base = dev->base_addr; | |
1380 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1381 | unsigned char txsr = inb_p(e8390_base+EN0_TSR); | |
1382 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); | |
1383 | ||
1384 | #ifdef VERBOSE_ERROR_DUMP | |
1385 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); | |
1386 | if (txsr & ENTSR_ABT) | |
1387 | printk("excess-collisions "); | |
1388 | if (txsr & ENTSR_ND) | |
1389 | printk("non-deferral "); | |
1390 | if (txsr & ENTSR_CRS) | |
1391 | printk("lost-carrier "); | |
1392 | if (txsr & ENTSR_FU) | |
1393 | printk("FIFO-underrun "); | |
1394 | if (txsr & ENTSR_CDH) | |
1395 | printk("lost-heartbeat "); | |
1396 | printk("\n"); | |
1397 | #endif | |
1398 | ||
1399 | if (tx_was_aborted) | |
1400 | ei_tx_intr(dev); | |
1401 | else | |
1402 | { | |
1403 | ei_local->stat.tx_errors++; | |
1404 | if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++; | |
1405 | if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++; | |
1406 | if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++; | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | /** | |
1411 | * ei_tx_intr - transmit interrupt handler | |
1412 | * @dev: network device for which tx intr is handled | |
1413 | * | |
1414 | * We have finished a transmit: check for errors and then trigger the next | |
1415 | * packet to be sent. Called with lock held. | |
1416 | */ | |
1417 | ||
1418 | static void ei_tx_intr(struct net_device *dev) | |
1419 | { | |
1420 | long e8390_base = dev->base_addr; | |
1421 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1422 | int status = inb(e8390_base + EN0_TSR); | |
1423 | ||
1424 | /* | |
1425 | * There are two Tx buffers, see which one finished, and trigger | |
1426 | * the send of another one if it exists. | |
1427 | */ | |
1428 | ei_local->txqueue--; | |
1429 | ||
1430 | if (ei_local->tx1 < 0) | |
1431 | { | |
1432 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) | |
1433 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", | |
1434 | ei_local->name, ei_local->lasttx, ei_local->tx1); | |
1435 | ei_local->tx1 = 0; | |
1436 | if (ei_local->tx2 > 0) | |
1437 | { | |
1438 | ei_local->txing = 1; | |
1439 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); | |
1440 | dev->trans_start = jiffies; | |
1441 | ei_local->tx2 = -1, | |
1442 | ei_local->lasttx = 2; | |
1443 | } | |
1444 | else ei_local->lasttx = 20, ei_local->txing = 0; | |
1445 | } | |
1446 | else if (ei_local->tx2 < 0) | |
1447 | { | |
1448 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) | |
1449 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", | |
1450 | ei_local->name, ei_local->lasttx, ei_local->tx2); | |
1451 | ei_local->tx2 = 0; | |
1452 | if (ei_local->tx1 > 0) | |
1453 | { | |
1454 | ei_local->txing = 1; | |
1455 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); | |
1456 | dev->trans_start = jiffies; | |
1457 | ei_local->tx1 = -1; | |
1458 | ei_local->lasttx = 1; | |
1459 | } | |
1460 | else | |
1461 | ei_local->lasttx = 10, ei_local->txing = 0; | |
1462 | } | |
1463 | // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", | |
1464 | // dev->name, ei_local->lasttx); | |
1465 | ||
1466 | /* Minimize Tx latency: update the statistics after we restart TXing. */ | |
1467 | if (status & ENTSR_COL) | |
1468 | ei_local->stat.collisions++; | |
1469 | if (status & ENTSR_PTX) | |
1470 | ei_local->stat.tx_packets++; | |
1471 | else | |
1472 | { | |
1473 | ei_local->stat.tx_errors++; | |
1474 | if (status & ENTSR_ABT) | |
1475 | { | |
1476 | ei_local->stat.tx_aborted_errors++; | |
1477 | ei_local->stat.collisions += 16; | |
1478 | } | |
1479 | if (status & ENTSR_CRS) | |
1480 | ei_local->stat.tx_carrier_errors++; | |
1481 | if (status & ENTSR_FU) | |
1482 | ei_local->stat.tx_fifo_errors++; | |
1483 | if (status & ENTSR_CDH) | |
1484 | ei_local->stat.tx_heartbeat_errors++; | |
1485 | if (status & ENTSR_OWC) | |
1486 | ei_local->stat.tx_window_errors++; | |
1487 | } | |
1488 | netif_wake_queue(dev); | |
1489 | } | |
1490 | ||
1491 | /** | |
1492 | * ei_receive - receive some packets | |
1493 | * @dev: network device with which receive will be run | |
1494 | * | |
1495 | * We have a good packet(s), get it/them out of the buffers. | |
1496 | * Called with lock held. | |
1497 | */ | |
1498 | ||
1499 | static void ei_receive(struct net_device *dev) | |
1500 | { | |
1501 | long e8390_base = dev->base_addr; | |
1502 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1503 | unsigned char rxing_page, this_frame, next_frame; | |
1504 | unsigned short current_offset; | |
1505 | int rx_pkt_count = 0; | |
1506 | struct e8390_pkt_hdr rx_frame; | |
1507 | ||
1508 | while (++rx_pkt_count < 10) | |
1509 | { | |
1510 | int pkt_len, pkt_stat; | |
1511 | ||
1512 | /* Get the rx page (incoming packet pointer). */ | |
1513 | rxing_page = inb_p(e8390_base + EN1_CURPAG -1); | |
1514 | ||
1515 | /* Remove one frame from the ring. Boundary is always a page behind. */ | |
1516 | this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; | |
1517 | if (this_frame >= ei_local->stop_page) | |
1518 | this_frame = ei_local->rx_start_page; | |
1519 | ||
1520 | /* Someday we'll omit the previous, iff we never get this message. | |
1521 | (There is at least one clone claimed to have a problem.) | |
1522 | ||
1523 | Keep quiet if it looks like a card removal. One problem here | |
1524 | is that some clones crash in roughly the same way. | |
1525 | */ | |
1526 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) | |
1527 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", | |
1528 | dev->name, this_frame, ei_local->current_page); | |
1529 | ||
1530 | if (this_frame == rxing_page) /* Read all the frames? */ | |
1531 | break; /* Done for now */ | |
1532 | ||
1533 | current_offset = this_frame << 8; | |
1534 | ei_get_8390_hdr(dev, &rx_frame, this_frame); | |
1535 | ||
1536 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); | |
1537 | pkt_stat = rx_frame.status; | |
1538 | ||
1539 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); | |
1540 | ||
1541 | if (pkt_len < 60 || pkt_len > 1518) | |
1542 | { | |
1543 | if (ei_debug) | |
1544 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", | |
1545 | dev->name, rx_frame.count, rx_frame.status, | |
1546 | rx_frame.next); | |
1547 | ei_local->stat.rx_errors++; | |
1548 | ei_local->stat.rx_length_errors++; | |
1549 | } | |
1550 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) | |
1551 | { | |
1552 | struct sk_buff *skb; | |
1553 | ||
1554 | skb = dev_alloc_skb(pkt_len+2); | |
1555 | if (skb == NULL) | |
1556 | { | |
1557 | if (ei_debug > 1) | |
1558 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", | |
1559 | dev->name, pkt_len); | |
1560 | ei_local->stat.rx_dropped++; | |
1561 | break; | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ | |
1566 | skb->dev = dev; | |
1567 | skb_put(skb, pkt_len); /* Make room */ | |
1568 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); | |
1569 | skb->protocol=eth_type_trans(skb,dev); | |
1570 | netif_rx(skb); | |
1571 | dev->last_rx = jiffies; | |
1572 | ei_local->stat.rx_packets++; | |
1573 | ei_local->stat.rx_bytes += pkt_len; | |
1574 | if (pkt_stat & ENRSR_PHY) | |
1575 | ei_local->stat.multicast++; | |
1576 | } | |
1577 | } | |
1578 | else | |
1579 | { | |
1580 | if (ei_debug) | |
1581 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", | |
1582 | dev->name, rx_frame.status, rx_frame.next, | |
1583 | rx_frame.count); | |
1584 | ei_local->stat.rx_errors++; | |
1585 | /* NB: The NIC counts CRC, frame and missed errors. */ | |
1586 | if (pkt_stat & ENRSR_FO) | |
1587 | ei_local->stat.rx_fifo_errors++; | |
1588 | } | |
1589 | next_frame = rx_frame.next; | |
1590 | ||
1591 | /* This _should_ never happen: it's here for avoiding bad clones. */ | |
1592 | if (next_frame >= ei_local->stop_page) { | |
1593 | printk("%s: next frame inconsistency, %#2x\n", dev->name, | |
1594 | next_frame); | |
1595 | next_frame = ei_local->rx_start_page; | |
1596 | } | |
1597 | ei_local->current_page = next_frame; | |
1598 | outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); | |
1599 | } | |
1600 | ||
1601 | return; | |
1602 | } | |
1603 | ||
1604 | /** | |
1605 | * ei_rx_overrun - handle receiver overrun | |
1606 | * @dev: network device which threw exception | |
1607 | * | |
1608 | * We have a receiver overrun: we have to kick the 8390 to get it started | |
1609 | * again. Problem is that you have to kick it exactly as NS prescribes in | |
1610 | * the updated datasheets, or "the NIC may act in an unpredictable manner." | |
1611 | * This includes causing "the NIC to defer indefinitely when it is stopped | |
1612 | * on a busy network." Ugh. | |
1613 | * Called with lock held. Don't call this with the interrupts off or your | |
1614 | * computer will hate you - it takes 10ms or so. | |
1615 | */ | |
1616 | ||
1617 | static void ei_rx_overrun(struct net_device *dev) | |
1618 | { | |
1619 | axnet_dev_t *info = (axnet_dev_t *)dev; | |
1620 | long e8390_base = dev->base_addr; | |
1621 | unsigned char was_txing, must_resend = 0; | |
1622 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1623 | ||
1624 | /* | |
1625 | * Record whether a Tx was in progress and then issue the | |
1626 | * stop command. | |
1627 | */ | |
1628 | was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; | |
1629 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1630 | ||
1631 | if (ei_debug > 1) | |
1632 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); | |
1633 | ei_local->stat.rx_over_errors++; | |
1634 | ||
1635 | /* | |
1636 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. | |
1637 | * Early datasheets said to poll the reset bit, but now they say that | |
1638 | * it "is not a reliable indicator and subsequently should be ignored." | |
1639 | * We wait at least 10ms. | |
1640 | */ | |
1641 | ||
1642 | mdelay(10); | |
1643 | ||
1644 | /* | |
1645 | * Reset RBCR[01] back to zero as per magic incantation. | |
1646 | */ | |
1647 | outb_p(0x00, e8390_base+EN0_RCNTLO); | |
1648 | outb_p(0x00, e8390_base+EN0_RCNTHI); | |
1649 | ||
1650 | /* | |
1651 | * See if any Tx was interrupted or not. According to NS, this | |
1652 | * step is vital, and skipping it will cause no end of havoc. | |
1653 | */ | |
1654 | ||
1655 | if (was_txing) | |
1656 | { | |
1657 | unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); | |
1658 | if (!tx_completed) | |
1659 | must_resend = 1; | |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * Have to enter loopback mode and then restart the NIC before | |
1664 | * you are allowed to slurp packets up off the ring. | |
1665 | */ | |
1666 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); | |
1667 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); | |
1668 | ||
1669 | /* | |
1670 | * Clear the Rx ring of all the debris, and ack the interrupt. | |
1671 | */ | |
1672 | ei_receive(dev); | |
1673 | ||
1674 | /* | |
1675 | * Leave loopback mode, and resend any packet that got stopped. | |
1676 | */ | |
1677 | outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); | |
1678 | if (must_resend) | |
1679 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * Collect the stats. This is called unlocked and from several contexts. | |
1684 | */ | |
1685 | ||
1686 | static struct net_device_stats *get_stats(struct net_device *dev) | |
1687 | { | |
1688 | long ioaddr = dev->base_addr; | |
1689 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1690 | unsigned long flags; | |
1691 | ||
1692 | /* If the card is stopped, just return the present stats. */ | |
1693 | if (!netif_running(dev)) | |
1694 | return &ei_local->stat; | |
1695 | ||
1696 | spin_lock_irqsave(&ei_local->page_lock,flags); | |
1697 | /* Read the counter registers, assuming we are in page 0. */ | |
1698 | ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); | |
1699 | ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); | |
1700 | ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); | |
1701 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1702 | ||
1703 | return &ei_local->stat; | |
1704 | } | |
1705 | ||
1706 | /** | |
1707 | * do_set_multicast_list - set/clear multicast filter | |
1708 | * @dev: net device for which multicast filter is adjusted | |
1709 | * | |
1710 | * Set or clear the multicast filter for this adaptor. May be called | |
1711 | * from a BH in 2.1.x. Must be called with lock held. | |
1712 | */ | |
1713 | ||
1714 | static void do_set_multicast_list(struct net_device *dev) | |
1715 | { | |
1716 | long e8390_base = dev->base_addr; | |
1717 | ||
1718 | if(dev->flags&IFF_PROMISC) | |
1719 | outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); | |
1720 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) | |
1721 | outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); | |
1722 | else | |
1723 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Called without lock held. This is invoked from user context and may | |
1728 | * be parallel to just about everything else. Its also fairly quick and | |
1729 | * not called too often. Must protect against both bh and irq users | |
1730 | */ | |
1731 | ||
1732 | static void set_multicast_list(struct net_device *dev) | |
1733 | { | |
1734 | unsigned long flags; | |
1735 | ||
1736 | spin_lock_irqsave(&dev_lock(dev), flags); | |
1737 | do_set_multicast_list(dev); | |
1738 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
1739 | } | |
1740 | ||
1741 | /** | |
1742 | * axdev_setup - init rest of 8390 device struct | |
1743 | * @dev: network device structure to init | |
1744 | * | |
1745 | * Initialize the rest of the 8390 device structure. Do NOT __init | |
1746 | * this, as it is used by 8390 based modular drivers too. | |
1747 | */ | |
1748 | ||
1749 | static void axdev_setup(struct net_device *dev) | |
1750 | { | |
1751 | struct ei_device *ei_local; | |
1752 | if (ei_debug > 1) | |
1753 | printk(version_8390); | |
1754 | ||
1755 | SET_MODULE_OWNER(dev); | |
1756 | ||
1757 | ||
1758 | ei_local = (struct ei_device *)netdev_priv(dev); | |
1759 | spin_lock_init(&ei_local->page_lock); | |
1760 | ||
1761 | dev->hard_start_xmit = &ei_start_xmit; | |
1762 | dev->get_stats = get_stats; | |
1763 | dev->set_multicast_list = &set_multicast_list; | |
1764 | ||
1765 | ether_setup(dev); | |
1766 | } | |
1767 | ||
1768 | /* This page of functions should be 8390 generic */ | |
1769 | /* Follow National Semi's recommendations for initializing the "NIC". */ | |
1770 | ||
1771 | /** | |
1772 | * AX88190_init - initialize 8390 hardware | |
1773 | * @dev: network device to initialize | |
1774 | * @startp: boolean. non-zero value to initiate chip processing | |
1775 | * | |
1776 | * Must be called with lock held. | |
1777 | */ | |
1778 | ||
1779 | static void AX88190_init(struct net_device *dev, int startp) | |
1780 | { | |
1781 | axnet_dev_t *info = PRIV(dev); | |
1782 | long e8390_base = dev->base_addr; | |
1783 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1784 | int i; | |
1785 | int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; | |
1786 | ||
1787 | if(sizeof(struct e8390_pkt_hdr)!=4) | |
1788 | panic("8390.c: header struct mispacked\n"); | |
1789 | /* Follow National Semi's recommendations for initing the DP83902. */ | |
1790 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ | |
1791 | outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ | |
1792 | /* Clear the remote byte count registers. */ | |
1793 | outb_p(0x00, e8390_base + EN0_RCNTLO); | |
1794 | outb_p(0x00, e8390_base + EN0_RCNTHI); | |
1795 | /* Set to monitor and loopback mode -- this is vital!. */ | |
1796 | outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ | |
1797 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ | |
1798 | /* Set the transmit page and receive ring. */ | |
1799 | outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); | |
1800 | ei_local->tx1 = ei_local->tx2 = 0; | |
1801 | outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); | |
1802 | outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ | |
1803 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ | |
1804 | outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); | |
1805 | /* Clear the pending interrupts and mask. */ | |
1806 | outb_p(0xFF, e8390_base + EN0_ISR); | |
1807 | outb_p(0x00, e8390_base + EN0_IMR); | |
1808 | ||
1809 | /* Copy the station address into the DS8390 registers. */ | |
1810 | ||
1811 | outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ | |
1812 | for(i = 0; i < 6; i++) | |
1813 | { | |
1814 | outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); | |
1815 | if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) | |
1816 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); | |
1817 | } | |
1818 | /* | |
1819 | * Initialize the multicast list to accept-all. If we enable multicast | |
1820 | * the higher levels can do the filtering. | |
1821 | */ | |
1822 | for (i = 0; i < 8; i++) | |
1823 | outb_p(0xff, e8390_base + EN1_MULT + i); | |
1824 | ||
1825 | outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); | |
1826 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1827 | ||
1828 | netif_start_queue(dev); | |
1829 | ei_local->tx1 = ei_local->tx2 = 0; | |
1830 | ei_local->txing = 0; | |
1831 | ||
1832 | if (startp) | |
1833 | { | |
1834 | outb_p(0xff, e8390_base + EN0_ISR); | |
1835 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1836 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1837 | outb_p(E8390_TXCONFIG | info->duplex_flag, | |
1838 | e8390_base + EN0_TXCR); /* xmit on. */ | |
1839 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ | |
1840 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ | |
1841 | do_set_multicast_list(dev); /* (re)load the mcast table */ | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | /* Trigger a transmit start, assuming the length is valid. | |
1846 | Always called with the page lock held */ | |
1847 | ||
1848 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1849 | int start_page) | |
1850 | { | |
1851 | long e8390_base = dev->base_addr; | |
1852 | struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev); | |
1853 | ||
1854 | if (inb_p(e8390_base) & E8390_TRANS) | |
1855 | { | |
1856 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", | |
1857 | dev->name); | |
1858 | return; | |
1859 | } | |
1860 | outb_p(length & 0xff, e8390_base + EN0_TCNTLO); | |
1861 | outb_p(length >> 8, e8390_base + EN0_TCNTHI); | |
1862 | outb_p(start_page, e8390_base + EN0_TPSR); | |
1863 | outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); | |
1864 | } |