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1da177e4 LT |
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 | ||
1da177e4 LT |
40 | #include <pcmcia/cs_types.h> |
41 | #include <pcmcia/cs.h> | |
42 | #include <pcmcia/cistpl.h> | |
43 | #include <pcmcia/ciscode.h> | |
44 | #include <pcmcia/ds.h> | |
45 | #include <pcmcia/cisreg.h> | |
46 | ||
47 | #include <asm/io.h> | |
48 | #include <asm/system.h> | |
49 | #include <asm/byteorder.h> | |
50 | #include <asm/uaccess.h> | |
51 | ||
52 | #define AXNET_CMD 0x00 | |
53 | #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */ | |
54 | #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */ | |
55 | #define AXNET_MII_EEP 0x14 /* Offset of MII access port */ | |
56 | #define AXNET_TEST 0x15 /* Offset of TEST Register port */ | |
57 | #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */ | |
58 | ||
59 | #define AXNET_START_PG 0x40 /* First page of TX buffer */ | |
60 | #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */ | |
61 | ||
62 | #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */ | |
63 | ||
64 | #define IS_AX88190 0x0001 | |
65 | #define IS_AX88790 0x0002 | |
66 | ||
67 | /*====================================================================*/ | |
68 | ||
69 | /* Module parameters */ | |
70 | ||
71 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
72 | MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver"); | |
73 | MODULE_LICENSE("GPL"); | |
74 | ||
75 | #ifdef PCMCIA_DEBUG | |
76 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) | |
77 | ||
78 | INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); | |
79 | #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) | |
80 | static char *version = | |
81 | "axnet_cs.c 1.28 2002/06/29 06:27:37 (David Hinds)"; | |
82 | #else | |
83 | #define DEBUG(n, args...) | |
84 | #endif | |
85 | ||
86 | /*====================================================================*/ | |
87 | ||
88 | static void axnet_config(dev_link_t *link); | |
89 | static void axnet_release(dev_link_t *link); | |
90 | static int axnet_event(event_t event, int priority, | |
91 | event_callback_args_t *args); | |
92 | static int axnet_open(struct net_device *dev); | |
93 | static int axnet_close(struct net_device *dev); | |
94 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
95 | static struct ethtool_ops netdev_ethtool_ops; | |
96 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs); | |
97 | static void ei_watchdog(u_long arg); | |
98 | static void axnet_reset_8390(struct net_device *dev); | |
99 | ||
100 | static int mdio_read(kio_addr_t addr, int phy_id, int loc); | |
101 | static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value); | |
102 | ||
103 | static void get_8390_hdr(struct net_device *, | |
104 | struct e8390_pkt_hdr *, int); | |
105 | static void block_input(struct net_device *dev, int count, | |
106 | struct sk_buff *skb, int ring_offset); | |
107 | static void block_output(struct net_device *dev, int count, | |
108 | const u_char *buf, const int start_page); | |
109 | ||
110 | static dev_link_t *axnet_attach(void); | |
111 | static void axnet_detach(dev_link_t *); | |
112 | ||
113 | static dev_info_t dev_info = "axnet_cs"; | |
114 | static dev_link_t *dev_list; | |
115 | ||
116 | static void axdev_setup(struct net_device *dev); | |
117 | static void AX88190_init(struct net_device *dev, int startp); | |
118 | static int ax_open(struct net_device *dev); | |
119 | static int ax_close(struct net_device *dev); | |
120 | static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
121 | ||
122 | /*====================================================================*/ | |
123 | ||
124 | typedef struct axnet_dev_t { | |
125 | dev_link_t link; | |
126 | dev_node_t node; | |
127 | caddr_t base; | |
128 | struct timer_list watchdog; | |
129 | int stale, fast_poll; | |
130 | u_short link_status; | |
131 | u_char duplex_flag; | |
132 | int phy_id; | |
133 | int flags; | |
134 | } axnet_dev_t; | |
135 | ||
136 | static inline axnet_dev_t *PRIV(struct net_device *dev) | |
137 | { | |
138 | void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device); | |
139 | return p; | |
140 | } | |
141 | ||
142 | /*====================================================================== | |
143 | ||
144 | axnet_attach() creates an "instance" of the driver, allocating | |
145 | local data structures for one device. The device is registered | |
146 | with Card Services. | |
147 | ||
148 | ======================================================================*/ | |
149 | ||
150 | static dev_link_t *axnet_attach(void) | |
151 | { | |
152 | axnet_dev_t *info; | |
153 | dev_link_t *link; | |
154 | struct net_device *dev; | |
155 | client_reg_t client_reg; | |
156 | int ret; | |
157 | ||
158 | DEBUG(0, "axnet_attach()\n"); | |
159 | ||
160 | dev = alloc_netdev(sizeof(struct ei_device) + sizeof(axnet_dev_t), | |
161 | "eth%d", axdev_setup); | |
162 | ||
163 | if (!dev) | |
164 | return NULL; | |
165 | ||
166 | info = PRIV(dev); | |
167 | link = &info->link; | |
168 | link->priv = dev; | |
169 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; | |
170 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; | |
171 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
172 | link->conf.IntType = INT_MEMORY_AND_IO; | |
173 | ||
174 | dev->open = &axnet_open; | |
175 | dev->stop = &axnet_close; | |
176 | dev->do_ioctl = &axnet_ioctl; | |
177 | SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); | |
178 | ||
179 | /* Register with Card Services */ | |
180 | link->next = dev_list; | |
181 | dev_list = link; | |
182 | client_reg.dev_info = &dev_info; | |
1da177e4 LT |
183 | client_reg.Version = 0x0210; |
184 | client_reg.event_callback_args.client_data = link; | |
185 | ret = pcmcia_register_client(&link->handle, &client_reg); | |
186 | if (ret != CS_SUCCESS) { | |
187 | cs_error(link->handle, RegisterClient, ret); | |
188 | axnet_detach(link); | |
189 | return NULL; | |
190 | } | |
191 | ||
192 | return link; | |
193 | } /* axnet_attach */ | |
194 | ||
195 | /*====================================================================== | |
196 | ||
197 | This deletes a driver "instance". The device is de-registered | |
198 | with Card Services. If it has been released, all local data | |
199 | structures are freed. Otherwise, the structures will be freed | |
200 | when the device is released. | |
201 | ||
202 | ======================================================================*/ | |
203 | ||
204 | static void axnet_detach(dev_link_t *link) | |
205 | { | |
206 | struct net_device *dev = link->priv; | |
207 | dev_link_t **linkp; | |
208 | ||
209 | DEBUG(0, "axnet_detach(0x%p)\n", link); | |
210 | ||
211 | /* Locate device structure */ | |
212 | for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) | |
213 | if (*linkp == link) break; | |
214 | if (*linkp == NULL) | |
215 | return; | |
216 | ||
217 | if (link->dev) | |
218 | unregister_netdev(dev); | |
219 | ||
220 | if (link->state & DEV_CONFIG) | |
221 | axnet_release(link); | |
222 | ||
223 | if (link->handle) | |
224 | pcmcia_deregister_client(link->handle); | |
225 | ||
226 | /* Unlink device structure, free bits */ | |
227 | *linkp = link->next; | |
228 | free_netdev(dev); | |
229 | } /* axnet_detach */ | |
230 | ||
231 | /*====================================================================== | |
232 | ||
233 | This probes for a card's hardware address by reading the PROM. | |
234 | ||
235 | ======================================================================*/ | |
236 | ||
237 | static int get_prom(dev_link_t *link) | |
238 | { | |
239 | struct net_device *dev = link->priv; | |
240 | kio_addr_t ioaddr = dev->base_addr; | |
241 | int i, j; | |
242 | ||
243 | /* This is based on drivers/net/ne.c */ | |
244 | struct { | |
245 | u_char value, offset; | |
246 | } program_seq[] = { | |
247 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ | |
248 | {0x01, EN0_DCFG}, /* Set word-wide access. */ | |
249 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ | |
250 | {0x00, EN0_RCNTHI}, | |
251 | {0x00, EN0_IMR}, /* Mask completion irq. */ | |
252 | {0xFF, EN0_ISR}, | |
253 | {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */ | |
254 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ | |
255 | {0x10, EN0_RCNTLO}, | |
256 | {0x00, EN0_RCNTHI}, | |
257 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */ | |
258 | {0x04, EN0_RSARHI}, | |
259 | {E8390_RREAD+E8390_START, E8390_CMD}, | |
260 | }; | |
261 | ||
262 | /* Not much of a test, but the alternatives are messy */ | |
263 | if (link->conf.ConfigBase != 0x03c0) | |
264 | return 0; | |
265 | ||
266 | axnet_reset_8390(dev); | |
267 | mdelay(10); | |
268 | ||
269 | for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) | |
270 | outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); | |
271 | ||
272 | for (i = 0; i < 6; i += 2) { | |
273 | j = inw(ioaddr + AXNET_DATAPORT); | |
274 | dev->dev_addr[i] = j & 0xff; | |
275 | dev->dev_addr[i+1] = j >> 8; | |
276 | } | |
277 | return 1; | |
278 | } /* get_prom */ | |
279 | ||
280 | /*====================================================================== | |
281 | ||
282 | axnet_config() is scheduled to run after a CARD_INSERTION event | |
283 | is received, to configure the PCMCIA socket, and to make the | |
284 | ethernet device available to the system. | |
285 | ||
286 | ======================================================================*/ | |
287 | ||
288 | #define CS_CHECK(fn, ret) \ | |
289 | do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) | |
290 | ||
291 | static int try_io_port(dev_link_t *link) | |
292 | { | |
293 | int j, ret; | |
294 | if (link->io.NumPorts1 == 32) { | |
295 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
296 | if (link->io.NumPorts2 > 0) { | |
297 | /* for master/slave multifunction cards */ | |
298 | link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; | |
299 | link->irq.Attributes = | |
300 | IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED; | |
301 | } | |
302 | } else { | |
303 | /* This should be two 16-port windows */ | |
304 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
305 | link->io.Attributes2 = IO_DATA_PATH_WIDTH_16; | |
306 | } | |
307 | if (link->io.BasePort1 == 0) { | |
308 | link->io.IOAddrLines = 16; | |
309 | for (j = 0; j < 0x400; j += 0x20) { | |
310 | link->io.BasePort1 = j ^ 0x300; | |
311 | link->io.BasePort2 = (j ^ 0x300) + 0x10; | |
312 | ret = pcmcia_request_io(link->handle, &link->io); | |
313 | if (ret == CS_SUCCESS) return ret; | |
314 | } | |
315 | return ret; | |
316 | } else { | |
317 | return pcmcia_request_io(link->handle, &link->io); | |
318 | } | |
319 | } | |
320 | ||
321 | static void axnet_config(dev_link_t *link) | |
322 | { | |
323 | client_handle_t handle = link->handle; | |
324 | struct net_device *dev = link->priv; | |
325 | axnet_dev_t *info = PRIV(dev); | |
326 | tuple_t tuple; | |
327 | cisparse_t parse; | |
328 | int i, j, last_ret, last_fn; | |
329 | u_short buf[64]; | |
330 | config_info_t conf; | |
331 | ||
332 | DEBUG(0, "axnet_config(0x%p)\n", link); | |
333 | ||
334 | tuple.Attributes = 0; | |
335 | tuple.TupleData = (cisdata_t *)buf; | |
336 | tuple.TupleDataMax = sizeof(buf); | |
337 | tuple.TupleOffset = 0; | |
338 | tuple.DesiredTuple = CISTPL_CONFIG; | |
339 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
340 | CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); | |
341 | CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); | |
342 | link->conf.ConfigBase = parse.config.base; | |
343 | /* don't trust the CIS on this; Linksys got it wrong */ | |
344 | link->conf.Present = 0x63; | |
345 | ||
346 | /* Configure card */ | |
347 | link->state |= DEV_CONFIG; | |
348 | ||
349 | /* Look up current Vcc */ | |
350 | CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); | |
351 | link->conf.Vcc = conf.Vcc; | |
352 | ||
353 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; | |
354 | tuple.Attributes = 0; | |
355 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
356 | while (last_ret == CS_SUCCESS) { | |
357 | cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); | |
358 | cistpl_io_t *io = &(parse.cftable_entry.io); | |
359 | ||
360 | if (pcmcia_get_tuple_data(handle, &tuple) != 0 || | |
361 | pcmcia_parse_tuple(handle, &tuple, &parse) != 0 || | |
362 | cfg->index == 0 || cfg->io.nwin == 0) | |
363 | goto next_entry; | |
364 | ||
365 | link->conf.ConfigIndex = 0x05; | |
366 | /* For multifunction cards, by convention, we configure the | |
367 | network function with window 0, and serial with window 1 */ | |
368 | if (io->nwin > 1) { | |
369 | i = (io->win[1].len > io->win[0].len); | |
370 | link->io.BasePort2 = io->win[1-i].base; | |
371 | link->io.NumPorts2 = io->win[1-i].len; | |
372 | } else { | |
373 | i = link->io.NumPorts2 = 0; | |
374 | } | |
375 | link->io.BasePort1 = io->win[i].base; | |
376 | link->io.NumPorts1 = io->win[i].len; | |
377 | link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
378 | if (link->io.NumPorts1 + link->io.NumPorts2 >= 32) { | |
379 | last_ret = try_io_port(link); | |
380 | if (last_ret == CS_SUCCESS) break; | |
381 | } | |
382 | next_entry: | |
383 | last_ret = pcmcia_get_next_tuple(handle, &tuple); | |
384 | } | |
385 | if (last_ret != CS_SUCCESS) { | |
386 | cs_error(handle, RequestIO, last_ret); | |
387 | goto failed; | |
388 | } | |
389 | ||
390 | CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq)); | |
391 | ||
392 | if (link->io.NumPorts2 == 8) { | |
393 | link->conf.Attributes |= CONF_ENABLE_SPKR; | |
394 | link->conf.Status = CCSR_AUDIO_ENA; | |
395 | } | |
396 | ||
397 | CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf)); | |
398 | dev->irq = link->irq.AssignedIRQ; | |
399 | dev->base_addr = link->io.BasePort1; | |
400 | ||
401 | if (!get_prom(link)) { | |
402 | printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n"); | |
403 | printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n"); | |
404 | goto failed; | |
405 | } | |
406 | ||
407 | ei_status.name = "AX88190"; | |
408 | ei_status.word16 = 1; | |
409 | ei_status.tx_start_page = AXNET_START_PG; | |
410 | ei_status.rx_start_page = AXNET_START_PG + TX_PAGES; | |
411 | ei_status.stop_page = AXNET_STOP_PG; | |
412 | ei_status.reset_8390 = &axnet_reset_8390; | |
413 | ei_status.get_8390_hdr = &get_8390_hdr; | |
414 | ei_status.block_input = &block_input; | |
415 | ei_status.block_output = &block_output; | |
416 | ||
417 | if (inb(dev->base_addr + AXNET_TEST) != 0) | |
418 | info->flags |= IS_AX88790; | |
419 | else | |
420 | info->flags |= IS_AX88190; | |
421 | ||
422 | if (info->flags & IS_AX88790) | |
423 | outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */ | |
424 | ||
425 | for (i = 0; i < 32; i++) { | |
426 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
427 | if ((j != 0) && (j != 0xffff)) break; | |
428 | } | |
429 | ||
430 | /* Maybe PHY is in power down mode. (PPD_SET = 1) | |
431 | Bit 2 of CCSR is active low. */ | |
432 | if (i == 32) { | |
433 | conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 }; | |
434 | pcmcia_access_configuration_register(link->handle, ®); | |
435 | for (i = 0; i < 32; i++) { | |
436 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
437 | if ((j != 0) && (j != 0xffff)) break; | |
438 | } | |
439 | } | |
440 | ||
441 | info->phy_id = (i < 32) ? i : -1; | |
442 | link->dev = &info->node; | |
443 | link->state &= ~DEV_CONFIG_PENDING; | |
444 | SET_NETDEV_DEV(dev, &handle_to_dev(handle)); | |
445 | ||
446 | if (register_netdev(dev) != 0) { | |
447 | printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n"); | |
448 | link->dev = NULL; | |
449 | goto failed; | |
450 | } | |
451 | ||
452 | strcpy(info->node.dev_name, dev->name); | |
453 | ||
454 | printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, hw_addr ", | |
455 | dev->name, ((info->flags & IS_AX88790) ? 7 : 1), | |
456 | dev->base_addr, dev->irq); | |
457 | for (i = 0; i < 6; i++) | |
458 | printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n")); | |
459 | if (info->phy_id != -1) { | |
460 | DEBUG(0, " MII transceiver at index %d, status %x.\n", info->phy_id, j); | |
461 | } else { | |
462 | printk(KERN_NOTICE " No MII transceivers found!\n"); | |
463 | } | |
464 | return; | |
465 | ||
466 | cs_failed: | |
467 | cs_error(link->handle, last_fn, last_ret); | |
468 | failed: | |
469 | axnet_release(link); | |
470 | link->state &= ~DEV_CONFIG_PENDING; | |
471 | return; | |
472 | } /* axnet_config */ | |
473 | ||
474 | /*====================================================================== | |
475 | ||
476 | After a card is removed, axnet_release() will unregister the net | |
477 | device, and release the PCMCIA configuration. If the device is | |
478 | still open, this will be postponed until it is closed. | |
479 | ||
480 | ======================================================================*/ | |
481 | ||
482 | static void axnet_release(dev_link_t *link) | |
483 | { | |
484 | DEBUG(0, "axnet_release(0x%p)\n", link); | |
485 | ||
486 | pcmcia_release_configuration(link->handle); | |
487 | pcmcia_release_io(link->handle, &link->io); | |
488 | pcmcia_release_irq(link->handle, &link->irq); | |
489 | ||
490 | link->state &= ~DEV_CONFIG; | |
491 | } | |
492 | ||
98e4c28b DB |
493 | static int axnet_suspend(struct pcmcia_device *p_dev) |
494 | { | |
495 | dev_link_t *link = dev_to_instance(p_dev); | |
496 | struct net_device *dev = link->priv; | |
497 | ||
498 | link->state |= DEV_SUSPEND; | |
499 | if (link->state & DEV_CONFIG) { | |
500 | if (link->open) | |
501 | netif_device_detach(dev); | |
502 | pcmcia_release_configuration(link->handle); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int axnet_resume(struct pcmcia_device *p_dev) | |
509 | { | |
510 | dev_link_t *link = dev_to_instance(p_dev); | |
511 | struct net_device *dev = link->priv; | |
512 | ||
513 | link->state &= ~DEV_SUSPEND; | |
514 | if (link->state & DEV_CONFIG) { | |
515 | pcmcia_request_configuration(link->handle, &link->conf); | |
516 | if (link->open) { | |
517 | axnet_reset_8390(dev); | |
518 | AX88190_init(dev, 1); | |
519 | netif_device_attach(dev); | |
520 | } | |
521 | } | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | ||
1da177e4 LT |
527 | /*====================================================================== |
528 | ||
529 | The card status event handler. Mostly, this schedules other | |
530 | stuff to run after an event is received. A CARD_REMOVAL event | |
531 | also sets some flags to discourage the net drivers from trying | |
532 | to talk to the card any more. | |
533 | ||
534 | ======================================================================*/ | |
535 | ||
536 | static int axnet_event(event_t event, int priority, | |
537 | event_callback_args_t *args) | |
538 | { | |
539 | dev_link_t *link = args->client_data; | |
540 | struct net_device *dev = link->priv; | |
541 | ||
542 | DEBUG(2, "axnet_event(0x%06x)\n", event); | |
543 | ||
544 | switch (event) { | |
545 | case CS_EVENT_CARD_REMOVAL: | |
546 | link->state &= ~DEV_PRESENT; | |
547 | if (link->state & DEV_CONFIG) | |
548 | netif_device_detach(dev); | |
549 | break; | |
550 | case CS_EVENT_CARD_INSERTION: | |
551 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; | |
552 | axnet_config(link); | |
553 | break; | |
1da177e4 LT |
554 | } |
555 | return 0; | |
556 | } /* axnet_event */ | |
557 | ||
558 | /*====================================================================== | |
559 | ||
560 | MII interface support | |
561 | ||
562 | ======================================================================*/ | |
563 | ||
564 | #define MDIO_SHIFT_CLK 0x01 | |
565 | #define MDIO_DATA_WRITE0 0x00 | |
566 | #define MDIO_DATA_WRITE1 0x08 | |
567 | #define MDIO_DATA_READ 0x04 | |
568 | #define MDIO_MASK 0x0f | |
569 | #define MDIO_ENB_IN 0x02 | |
570 | ||
571 | static void mdio_sync(kio_addr_t addr) | |
572 | { | |
573 | int bits; | |
574 | for (bits = 0; bits < 32; bits++) { | |
575 | outb_p(MDIO_DATA_WRITE1, addr); | |
576 | outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr); | |
577 | } | |
578 | } | |
579 | ||
580 | static int mdio_read(kio_addr_t addr, int phy_id, int loc) | |
581 | { | |
582 | u_int cmd = (0xf6<<10)|(phy_id<<5)|loc; | |
583 | int i, retval = 0; | |
584 | ||
585 | mdio_sync(addr); | |
586 | for (i = 14; i >= 0; i--) { | |
587 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
588 | outb_p(dat, addr); | |
589 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
590 | } | |
591 | for (i = 19; i > 0; i--) { | |
592 | outb_p(MDIO_ENB_IN, addr); | |
593 | retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0); | |
594 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
595 | } | |
596 | return (retval>>1) & 0xffff; | |
597 | } | |
598 | ||
599 | static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value) | |
600 | { | |
601 | u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value; | |
602 | int i; | |
603 | ||
604 | mdio_sync(addr); | |
605 | for (i = 31; i >= 0; i--) { | |
606 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
607 | outb_p(dat, addr); | |
608 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
609 | } | |
610 | for (i = 1; i >= 0; i--) { | |
611 | outb_p(MDIO_ENB_IN, addr); | |
612 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
613 | } | |
614 | } | |
615 | ||
616 | /*====================================================================*/ | |
617 | ||
618 | static int axnet_open(struct net_device *dev) | |
619 | { | |
620 | axnet_dev_t *info = PRIV(dev); | |
621 | dev_link_t *link = &info->link; | |
622 | ||
623 | DEBUG(2, "axnet_open('%s')\n", dev->name); | |
624 | ||
625 | if (!DEV_OK(link)) | |
626 | return -ENODEV; | |
627 | ||
628 | link->open++; | |
629 | ||
630 | request_irq(dev->irq, ei_irq_wrapper, SA_SHIRQ, dev_info, dev); | |
631 | ||
632 | info->link_status = 0x00; | |
633 | init_timer(&info->watchdog); | |
634 | info->watchdog.function = &ei_watchdog; | |
635 | info->watchdog.data = (u_long)dev; | |
636 | info->watchdog.expires = jiffies + HZ; | |
637 | add_timer(&info->watchdog); | |
638 | ||
639 | return ax_open(dev); | |
640 | } /* axnet_open */ | |
641 | ||
642 | /*====================================================================*/ | |
643 | ||
644 | static int axnet_close(struct net_device *dev) | |
645 | { | |
646 | axnet_dev_t *info = PRIV(dev); | |
647 | dev_link_t *link = &info->link; | |
648 | ||
649 | DEBUG(2, "axnet_close('%s')\n", dev->name); | |
650 | ||
651 | ax_close(dev); | |
652 | free_irq(dev->irq, dev); | |
653 | ||
654 | link->open--; | |
655 | netif_stop_queue(dev); | |
656 | del_timer_sync(&info->watchdog); | |
657 | ||
658 | return 0; | |
659 | } /* axnet_close */ | |
660 | ||
661 | /*====================================================================== | |
662 | ||
663 | Hard reset the card. This used to pause for the same period that | |
664 | a 8390 reset command required, but that shouldn't be necessary. | |
665 | ||
666 | ======================================================================*/ | |
667 | ||
668 | static void axnet_reset_8390(struct net_device *dev) | |
669 | { | |
670 | kio_addr_t nic_base = dev->base_addr; | |
671 | int i; | |
672 | ||
673 | ei_status.txing = ei_status.dmaing = 0; | |
674 | ||
675 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD); | |
676 | ||
677 | outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET); | |
678 | ||
679 | for (i = 0; i < 100; i++) { | |
680 | if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0) | |
681 | break; | |
682 | udelay(100); | |
683 | } | |
684 | outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */ | |
685 | ||
686 | if (i == 100) | |
687 | printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n", | |
688 | dev->name); | |
689 | ||
690 | } /* axnet_reset_8390 */ | |
691 | ||
692 | /*====================================================================*/ | |
693 | ||
694 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs) | |
695 | { | |
696 | struct net_device *dev = dev_id; | |
697 | PRIV(dev)->stale = 0; | |
698 | return ax_interrupt(irq, dev_id, regs); | |
699 | } | |
700 | ||
701 | static void ei_watchdog(u_long arg) | |
702 | { | |
703 | struct net_device *dev = (struct net_device *)(arg); | |
704 | axnet_dev_t *info = PRIV(dev); | |
705 | kio_addr_t nic_base = dev->base_addr; | |
706 | kio_addr_t mii_addr = nic_base + AXNET_MII_EEP; | |
707 | u_short link; | |
708 | ||
709 | if (!netif_device_present(dev)) goto reschedule; | |
710 | ||
711 | /* Check for pending interrupt with expired latency timer: with | |
712 | this, we can limp along even if the interrupt is blocked */ | |
713 | if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) { | |
714 | if (!info->fast_poll) | |
715 | printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); | |
716 | ei_irq_wrapper(dev->irq, dev, NULL); | |
717 | info->fast_poll = HZ; | |
718 | } | |
719 | if (info->fast_poll) { | |
720 | info->fast_poll--; | |
721 | info->watchdog.expires = jiffies + 1; | |
722 | add_timer(&info->watchdog); | |
723 | return; | |
724 | } | |
725 | ||
726 | if (info->phy_id < 0) | |
727 | goto reschedule; | |
728 | link = mdio_read(mii_addr, info->phy_id, 1); | |
729 | if (!link || (link == 0xffff)) { | |
730 | printk(KERN_INFO "%s: MII is missing!\n", dev->name); | |
731 | info->phy_id = -1; | |
732 | goto reschedule; | |
733 | } | |
734 | ||
735 | link &= 0x0004; | |
736 | if (link != info->link_status) { | |
737 | u_short p = mdio_read(mii_addr, info->phy_id, 5); | |
738 | printk(KERN_INFO "%s: %s link beat\n", dev->name, | |
739 | (link) ? "found" : "lost"); | |
740 | if (link) { | |
741 | info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00; | |
742 | if (p) | |
743 | printk(KERN_INFO "%s: autonegotiation complete: " | |
744 | "%sbaseT-%cD selected\n", dev->name, | |
745 | ((p & 0x0180) ? "100" : "10"), | |
746 | ((p & 0x0140) ? 'F' : 'H')); | |
747 | else | |
748 | printk(KERN_INFO "%s: link partner did not autonegotiate\n", | |
749 | dev->name); | |
750 | AX88190_init(dev, 1); | |
751 | } | |
752 | info->link_status = link; | |
753 | } | |
754 | ||
755 | reschedule: | |
756 | info->watchdog.expires = jiffies + HZ; | |
757 | add_timer(&info->watchdog); | |
758 | } | |
759 | ||
760 | static void netdev_get_drvinfo(struct net_device *dev, | |
761 | struct ethtool_drvinfo *info) | |
762 | { | |
763 | strcpy(info->driver, "axnet_cs"); | |
764 | } | |
765 | ||
766 | static struct ethtool_ops netdev_ethtool_ops = { | |
767 | .get_drvinfo = netdev_get_drvinfo, | |
768 | }; | |
769 | ||
770 | /*====================================================================*/ | |
771 | ||
772 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
773 | { | |
774 | axnet_dev_t *info = PRIV(dev); | |
775 | u16 *data = (u16 *)&rq->ifr_ifru; | |
776 | kio_addr_t mii_addr = dev->base_addr + AXNET_MII_EEP; | |
777 | switch (cmd) { | |
778 | case SIOCGMIIPHY: | |
779 | data[0] = info->phy_id; | |
780 | case SIOCGMIIREG: /* Read MII PHY register. */ | |
781 | data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f); | |
782 | return 0; | |
783 | case SIOCSMIIREG: /* Write MII PHY register. */ | |
784 | if (!capable(CAP_NET_ADMIN)) | |
785 | return -EPERM; | |
786 | mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]); | |
787 | return 0; | |
788 | } | |
789 | return -EOPNOTSUPP; | |
790 | } | |
791 | ||
792 | /*====================================================================*/ | |
793 | ||
794 | static void get_8390_hdr(struct net_device *dev, | |
795 | struct e8390_pkt_hdr *hdr, | |
796 | int ring_page) | |
797 | { | |
798 | kio_addr_t nic_base = dev->base_addr; | |
799 | ||
800 | outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ | |
801 | outb_p(ring_page, nic_base + EN0_RSARHI); | |
802 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
803 | ||
804 | insw(nic_base + AXNET_DATAPORT, hdr, | |
805 | sizeof(struct e8390_pkt_hdr)>>1); | |
806 | /* Fix for big endian systems */ | |
807 | hdr->count = le16_to_cpu(hdr->count); | |
808 | ||
809 | } | |
810 | ||
811 | /*====================================================================*/ | |
812 | ||
813 | static void block_input(struct net_device *dev, int count, | |
814 | struct sk_buff *skb, int ring_offset) | |
815 | { | |
816 | kio_addr_t nic_base = dev->base_addr; | |
817 | int xfer_count = count; | |
818 | char *buf = skb->data; | |
819 | ||
820 | #ifdef PCMCIA_DEBUG | |
821 | if ((ei_debug > 4) && (count != 4)) | |
822 | printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4); | |
823 | #endif | |
824 | outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); | |
825 | outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); | |
826 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
827 | ||
828 | insw(nic_base + AXNET_DATAPORT,buf,count>>1); | |
829 | if (count & 0x01) | |
830 | buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++; | |
831 | ||
832 | } | |
833 | ||
834 | /*====================================================================*/ | |
835 | ||
836 | static void block_output(struct net_device *dev, int count, | |
837 | const u_char *buf, const int start_page) | |
838 | { | |
839 | kio_addr_t nic_base = dev->base_addr; | |
840 | ||
841 | #ifdef PCMCIA_DEBUG | |
842 | if (ei_debug > 4) | |
843 | printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count); | |
844 | #endif | |
845 | ||
846 | /* Round the count up for word writes. Do we need to do this? | |
847 | What effect will an odd byte count have on the 8390? | |
848 | I should check someday. */ | |
849 | if (count & 0x01) | |
850 | count++; | |
851 | ||
852 | outb_p(0x00, nic_base + EN0_RSARLO); | |
853 | outb_p(start_page, nic_base + EN0_RSARHI); | |
854 | outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD); | |
855 | outsw(nic_base + AXNET_DATAPORT, buf, count>>1); | |
856 | } | |
857 | ||
c414f755 DB |
858 | static struct pcmcia_device_id axnet_ids[] = { |
859 | PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081), | |
860 | PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301), | |
861 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301), | |
862 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303), | |
863 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309), | |
864 | PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106), | |
865 | PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab), | |
866 | PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef), | |
867 | PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef), | |
868 | PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1), | |
869 | PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc), | |
870 | PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b), | |
871 | PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5), | |
872 | PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e), | |
873 | PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90), | |
874 | PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8), | |
875 | PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609), | |
876 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04), | |
877 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116), | |
878 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058), | |
879 | PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef), | |
880 | /* this is not specific enough */ | |
881 | /* PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), */ | |
882 | PCMCIA_DEVICE_NULL, | |
883 | }; | |
884 | MODULE_DEVICE_TABLE(pcmcia, axnet_ids); | |
885 | ||
1da177e4 LT |
886 | static struct pcmcia_driver axnet_cs_driver = { |
887 | .owner = THIS_MODULE, | |
888 | .drv = { | |
889 | .name = "axnet_cs", | |
890 | }, | |
891 | .attach = axnet_attach, | |
1e212f36 | 892 | .event = axnet_event, |
1da177e4 | 893 | .detach = axnet_detach, |
c414f755 | 894 | .id_table = axnet_ids, |
98e4c28b DB |
895 | .suspend = axnet_suspend, |
896 | .resume = axnet_resume, | |
1da177e4 LT |
897 | }; |
898 | ||
899 | static int __init init_axnet_cs(void) | |
900 | { | |
901 | return pcmcia_register_driver(&axnet_cs_driver); | |
902 | } | |
903 | ||
904 | static void __exit exit_axnet_cs(void) | |
905 | { | |
906 | pcmcia_unregister_driver(&axnet_cs_driver); | |
907 | BUG_ON(dev_list != NULL); | |
908 | } | |
909 | ||
910 | module_init(init_axnet_cs); | |
911 | module_exit(exit_axnet_cs); | |
912 | ||
913 | /*====================================================================*/ | |
914 | ||
915 | /* 8390.c: A general NS8390 ethernet driver core for linux. */ | |
916 | /* | |
917 | Written 1992-94 by Donald Becker. | |
918 | ||
919 | Copyright 1993 United States Government as represented by the | |
920 | Director, National Security Agency. | |
921 | ||
922 | This software may be used and distributed according to the terms | |
923 | of the GNU General Public License, incorporated herein by reference. | |
924 | ||
925 | The author may be reached as becker@scyld.com, or C/O | |
926 | Scyld Computing Corporation | |
927 | 410 Severn Ave., Suite 210 | |
928 | Annapolis MD 21403 | |
929 | ||
930 | This is the chip-specific code for many 8390-based ethernet adaptors. | |
931 | This is not a complete driver, it must be combined with board-specific | |
932 | code such as ne.c, wd.c, 3c503.c, etc. | |
933 | ||
934 | Seeing how at least eight drivers use this code, (not counting the | |
935 | PCMCIA ones either) it is easy to break some card by what seems like | |
936 | a simple innocent change. Please contact me or Donald if you think | |
937 | you have found something that needs changing. -- PG | |
938 | ||
939 | Changelog: | |
940 | ||
941 | Paul Gortmaker : remove set_bit lock, other cleanups. | |
942 | Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to | |
943 | ei_block_input() for eth_io_copy_and_sum(). | |
944 | Paul Gortmaker : exchange static int ei_pingpong for a #define, | |
945 | also add better Tx error handling. | |
946 | Paul Gortmaker : rewrite Rx overrun handling as per NS specs. | |
947 | Alexey Kuznetsov : use the 8390's six bit hash multicast filter. | |
948 | Paul Gortmaker : tweak ANK's above multicast changes a bit. | |
949 | Paul Gortmaker : update packet statistics for v2.1.x | |
950 | Alan Cox : support arbitary stupid port mappings on the | |
951 | 68K Macintosh. Support >16bit I/O spaces | |
952 | Paul Gortmaker : add kmod support for auto-loading of the 8390 | |
953 | module by all drivers that require it. | |
954 | Alan Cox : Spinlocking work, added 'BUG_83C690' | |
955 | Paul Gortmaker : Separate out Tx timeout code from Tx path. | |
956 | ||
957 | Sources: | |
958 | The National Semiconductor LAN Databook, and the 3Com 3c503 databook. | |
959 | ||
960 | */ | |
961 | ||
962 | static const char *version_8390 = | |
963 | "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n"; | |
964 | ||
965 | #include <linux/bitops.h> | |
966 | #include <asm/irq.h> | |
967 | #include <linux/fcntl.h> | |
968 | #include <linux/in.h> | |
969 | #include <linux/interrupt.h> | |
970 | ||
971 | #include <linux/etherdevice.h> | |
972 | ||
973 | #define BUG_83C690 | |
974 | ||
975 | /* These are the operational function interfaces to board-specific | |
976 | routines. | |
977 | void reset_8390(struct net_device *dev) | |
978 | Resets the board associated with DEV, including a hardware reset of | |
979 | the 8390. This is only called when there is a transmit timeout, and | |
980 | it is always followed by 8390_init(). | |
981 | void block_output(struct net_device *dev, int count, const unsigned char *buf, | |
982 | int start_page) | |
983 | Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The | |
984 | "page" value uses the 8390's 256-byte pages. | |
985 | void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) | |
986 | Read the 4 byte, page aligned 8390 header. *If* there is a | |
987 | subsequent read, it will be of the rest of the packet. | |
988 | void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
989 | Read COUNT bytes from the packet buffer into the skb data area. Start | |
990 | reading from RING_OFFSET, the address as the 8390 sees it. This will always | |
991 | follow the read of the 8390 header. | |
992 | */ | |
993 | #define ei_reset_8390 (ei_local->reset_8390) | |
994 | #define ei_block_output (ei_local->block_output) | |
995 | #define ei_block_input (ei_local->block_input) | |
996 | #define ei_get_8390_hdr (ei_local->get_8390_hdr) | |
997 | ||
998 | /* use 0 for production, 1 for verification, >2 for debug */ | |
999 | #ifndef ei_debug | |
1000 | int ei_debug = 1; | |
1001 | #endif | |
1002 | ||
1003 | /* Index to functions. */ | |
1004 | static void ei_tx_intr(struct net_device *dev); | |
1005 | static void ei_tx_err(struct net_device *dev); | |
1006 | static void ei_tx_timeout(struct net_device *dev); | |
1007 | static void ei_receive(struct net_device *dev); | |
1008 | static void ei_rx_overrun(struct net_device *dev); | |
1009 | ||
1010 | /* Routines generic to NS8390-based boards. */ | |
1011 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1012 | int start_page); | |
1013 | static void set_multicast_list(struct net_device *dev); | |
1014 | static void do_set_multicast_list(struct net_device *dev); | |
1015 | ||
1016 | /* | |
1017 | * SMP and the 8390 setup. | |
1018 | * | |
1019 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is | |
1020 | * a page register that controls bank and packet buffer access. We guard | |
1021 | * this with ei_local->page_lock. Nobody should assume or set the page other | |
1022 | * than zero when the lock is not held. Lock holders must restore page 0 | |
1023 | * before unlocking. Even pure readers must take the lock to protect in | |
1024 | * page 0. | |
1025 | * | |
1026 | * To make life difficult the chip can also be very slow. We therefore can't | |
1027 | * just use spinlocks. For the longer lockups we disable the irq the device | |
1028 | * sits on and hold the lock. We must hold the lock because there is a dual | |
1029 | * processor case other than interrupts (get stats/set multicast list in | |
1030 | * parallel with each other and transmit). | |
1031 | * | |
1032 | * Note: in theory we can just disable the irq on the card _but_ there is | |
1033 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" | |
1034 | * enter lock, take the queued irq. So we waddle instead of flying. | |
1035 | * | |
1036 | * Finally by special arrangement for the purpose of being generally | |
1037 | * annoying the transmit function is called bh atomic. That places | |
1038 | * restrictions on the user context callers as disable_irq won't save | |
1039 | * them. | |
1040 | */ | |
1041 | ||
1042 | /** | |
1043 | * ax_open - Open/initialize the board. | |
1044 | * @dev: network device to initialize | |
1045 | * | |
1046 | * This routine goes all-out, setting everything | |
1047 | * up anew at each open, even though many of these registers should only | |
1048 | * need to be set once at boot. | |
1049 | */ | |
1050 | static int ax_open(struct net_device *dev) | |
1051 | { | |
1052 | unsigned long flags; | |
1053 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1054 | ||
1055 | #ifdef HAVE_TX_TIMEOUT | |
1056 | /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout | |
1057 | wrapper that does e.g. media check & then calls ei_tx_timeout. */ | |
1058 | if (dev->tx_timeout == NULL) | |
1059 | dev->tx_timeout = ei_tx_timeout; | |
1060 | if (dev->watchdog_timeo <= 0) | |
1061 | dev->watchdog_timeo = TX_TIMEOUT; | |
1062 | #endif | |
1063 | ||
1064 | /* | |
1065 | * Grab the page lock so we own the register set, then call | |
1066 | * the init function. | |
1067 | */ | |
1068 | ||
1069 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1070 | AX88190_init(dev, 1); | |
1071 | /* Set the flag before we drop the lock, That way the IRQ arrives | |
1072 | after its set and we get no silly warnings */ | |
1073 | netif_start_queue(dev); | |
1074 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1075 | ei_local->irqlock = 0; | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) | |
1080 | ||
1081 | /** | |
1082 | * ax_close - shut down network device | |
1083 | * @dev: network device to close | |
1084 | * | |
1085 | * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. | |
1086 | */ | |
1087 | int ax_close(struct net_device *dev) | |
1088 | { | |
1089 | unsigned long flags; | |
1090 | ||
1091 | /* | |
1092 | * Hold the page lock during close | |
1093 | */ | |
1094 | ||
1095 | spin_lock_irqsave(&dev_lock(dev), flags); | |
1096 | AX88190_init(dev, 0); | |
1097 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
1098 | netif_stop_queue(dev); | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | /** | |
1103 | * ei_tx_timeout - handle transmit time out condition | |
1104 | * @dev: network device which has apparently fallen asleep | |
1105 | * | |
1106 | * Called by kernel when device never acknowledges a transmit has | |
1107 | * completed (or failed) - i.e. never posted a Tx related interrupt. | |
1108 | */ | |
1109 | ||
1110 | void ei_tx_timeout(struct net_device *dev) | |
1111 | { | |
1112 | long e8390_base = dev->base_addr; | |
1113 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1114 | int txsr, isr, tickssofar = jiffies - dev->trans_start; | |
1115 | unsigned long flags; | |
1116 | ||
1117 | ei_local->stat.tx_errors++; | |
1118 | ||
1119 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1120 | txsr = inb(e8390_base+EN0_TSR); | |
1121 | isr = inb(e8390_base+EN0_ISR); | |
1122 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1123 | ||
1124 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", | |
1125 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : | |
1126 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); | |
1127 | ||
1128 | if (!isr && !ei_local->stat.tx_packets) | |
1129 | { | |
1130 | /* The 8390 probably hasn't gotten on the cable yet. */ | |
1131 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ | |
1132 | } | |
1133 | ||
1134 | /* Ugly but a reset can be slow, yet must be protected */ | |
1135 | ||
1136 | disable_irq_nosync(dev->irq); | |
1137 | spin_lock(&ei_local->page_lock); | |
1138 | ||
1139 | /* Try to restart the card. Perhaps the user has fixed something. */ | |
1140 | ei_reset_8390(dev); | |
1141 | AX88190_init(dev, 1); | |
1142 | ||
1143 | spin_unlock(&ei_local->page_lock); | |
1144 | enable_irq(dev->irq); | |
1145 | netif_wake_queue(dev); | |
1146 | } | |
1147 | ||
1148 | /** | |
1149 | * ei_start_xmit - begin packet transmission | |
1150 | * @skb: packet to be sent | |
1151 | * @dev: network device to which packet is sent | |
1152 | * | |
1153 | * Sends a packet to an 8390 network device. | |
1154 | */ | |
1155 | ||
1156 | static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1157 | { | |
1158 | long e8390_base = dev->base_addr; | |
1159 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1160 | int length, send_length, output_page; | |
1161 | unsigned long flags; | |
1162 | u8 packet[ETH_ZLEN]; | |
1163 | ||
1164 | netif_stop_queue(dev); | |
1165 | ||
1166 | length = skb->len; | |
1167 | ||
1168 | /* Mask interrupts from the ethercard. | |
1169 | SMP: We have to grab the lock here otherwise the IRQ handler | |
1170 | on another CPU can flip window and race the IRQ mask set. We end | |
1171 | up trashing the mcast filter not disabling irqs if we don't lock */ | |
1172 | ||
1173 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1174 | outb_p(0x00, e8390_base + EN0_IMR); | |
1175 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1176 | ||
1177 | /* | |
1178 | * Slow phase with lock held. | |
1179 | */ | |
1180 | ||
1181 | disable_irq_nosync(dev->irq); | |
1182 | ||
1183 | spin_lock(&ei_local->page_lock); | |
1184 | ||
1185 | ei_local->irqlock = 1; | |
1186 | ||
1187 | send_length = ETH_ZLEN < length ? length : ETH_ZLEN; | |
1188 | ||
1189 | /* | |
1190 | * We have two Tx slots available for use. Find the first free | |
1191 | * slot, and then perform some sanity checks. With two Tx bufs, | |
1192 | * you get very close to transmitting back-to-back packets. With | |
1193 | * only one Tx buf, the transmitter sits idle while you reload the | |
1194 | * card, leaving a substantial gap between each transmitted packet. | |
1195 | */ | |
1196 | ||
1197 | if (ei_local->tx1 == 0) | |
1198 | { | |
1199 | output_page = ei_local->tx_start_page; | |
1200 | ei_local->tx1 = send_length; | |
1201 | if (ei_debug && ei_local->tx2 > 0) | |
1202 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", | |
1203 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); | |
1204 | } | |
1205 | else if (ei_local->tx2 == 0) | |
1206 | { | |
1207 | output_page = ei_local->tx_start_page + TX_PAGES/2; | |
1208 | ei_local->tx2 = send_length; | |
1209 | if (ei_debug && ei_local->tx1 > 0) | |
1210 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", | |
1211 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); | |
1212 | } | |
1213 | else | |
1214 | { /* We should never get here. */ | |
1215 | if (ei_debug) | |
1216 | printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n", | |
1217 | dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx); | |
1218 | ei_local->irqlock = 0; | |
1219 | netif_stop_queue(dev); | |
1220 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1221 | spin_unlock(&ei_local->page_lock); | |
1222 | enable_irq(dev->irq); | |
1223 | ei_local->stat.tx_errors++; | |
1224 | return 1; | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * Okay, now upload the packet and trigger a send if the transmitter | |
1229 | * isn't already sending. If it is busy, the interrupt handler will | |
1230 | * trigger the send later, upon receiving a Tx done interrupt. | |
1231 | */ | |
1232 | ||
1233 | if (length == skb->len) | |
1234 | ei_block_output(dev, length, skb->data, output_page); | |
1235 | else { | |
1236 | memset(packet, 0, ETH_ZLEN); | |
1237 | memcpy(packet, skb->data, skb->len); | |
1238 | ei_block_output(dev, length, packet, output_page); | |
1239 | } | |
1240 | ||
1241 | if (! ei_local->txing) | |
1242 | { | |
1243 | ei_local->txing = 1; | |
1244 | NS8390_trigger_send(dev, send_length, output_page); | |
1245 | dev->trans_start = jiffies; | |
1246 | if (output_page == ei_local->tx_start_page) | |
1247 | { | |
1248 | ei_local->tx1 = -1; | |
1249 | ei_local->lasttx = -1; | |
1250 | } | |
1251 | else | |
1252 | { | |
1253 | ei_local->tx2 = -1; | |
1254 | ei_local->lasttx = -2; | |
1255 | } | |
1256 | } | |
1257 | else ei_local->txqueue++; | |
1258 | ||
1259 | if (ei_local->tx1 && ei_local->tx2) | |
1260 | netif_stop_queue(dev); | |
1261 | else | |
1262 | netif_start_queue(dev); | |
1263 | ||
1264 | /* Turn 8390 interrupts back on. */ | |
1265 | ei_local->irqlock = 0; | |
1266 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1267 | ||
1268 | spin_unlock(&ei_local->page_lock); | |
1269 | enable_irq(dev->irq); | |
1270 | ||
1271 | dev_kfree_skb (skb); | |
1272 | ei_local->stat.tx_bytes += send_length; | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /** | |
1278 | * ax_interrupt - handle the interrupts from an 8390 | |
1279 | * @irq: interrupt number | |
1280 | * @dev_id: a pointer to the net_device | |
1281 | * @regs: unused | |
1282 | * | |
1283 | * Handle the ether interface interrupts. We pull packets from | |
1284 | * the 8390 via the card specific functions and fire them at the networking | |
1285 | * stack. We also handle transmit completions and wake the transmit path if | |
1286 | * necessary. We also update the counters and do other housekeeping as | |
1287 | * needed. | |
1288 | */ | |
1289 | ||
1290 | static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs * regs) | |
1291 | { | |
1292 | struct net_device *dev = dev_id; | |
1293 | long e8390_base; | |
1294 | int interrupts, nr_serviced = 0, i; | |
1295 | struct ei_device *ei_local; | |
1296 | int handled = 0; | |
1297 | ||
1298 | if (dev == NULL) | |
1299 | { | |
1300 | printk ("net_interrupt(): irq %d for unknown device.\n", irq); | |
1301 | return IRQ_NONE; | |
1302 | } | |
1303 | ||
1304 | e8390_base = dev->base_addr; | |
1305 | ei_local = (struct ei_device *) netdev_priv(dev); | |
1306 | ||
1307 | /* | |
1308 | * Protect the irq test too. | |
1309 | */ | |
1310 | ||
1311 | spin_lock(&ei_local->page_lock); | |
1312 | ||
1313 | if (ei_local->irqlock) | |
1314 | { | |
1315 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ | |
1316 | /* The "irqlock" check is only for testing. */ | |
1317 | printk(ei_local->irqlock | |
1318 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" | |
1319 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", | |
1320 | dev->name, inb_p(e8390_base + EN0_ISR), | |
1321 | inb_p(e8390_base + EN0_IMR)); | |
1322 | #endif | |
1323 | spin_unlock(&ei_local->page_lock); | |
1324 | return IRQ_NONE; | |
1325 | } | |
1326 | ||
1327 | if (ei_debug > 3) | |
1328 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, | |
1329 | inb_p(e8390_base + EN0_ISR)); | |
1330 | ||
1331 | outb_p(0x00, e8390_base + EN0_ISR); | |
1332 | ei_local->irqlock = 1; | |
1333 | ||
1334 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ | |
1335 | while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 | |
1336 | && ++nr_serviced < MAX_SERVICE) | |
1337 | { | |
1338 | if (!netif_running(dev) || (interrupts == 0xff)) { | |
1339 | if (ei_debug > 1) | |
1340 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); | |
1341 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1342 | interrupts = 0; | |
1343 | break; | |
1344 | } | |
1345 | handled = 1; | |
1346 | ||
1347 | /* AX88190 bug fix. */ | |
1348 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1349 | for (i = 0; i < 10; i++) { | |
1350 | if (!(inb(e8390_base + EN0_ISR) & interrupts)) | |
1351 | break; | |
1352 | outb_p(0, e8390_base + EN0_ISR); | |
1353 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1354 | } | |
1355 | if (interrupts & ENISR_OVER) | |
1356 | ei_rx_overrun(dev); | |
1357 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) | |
1358 | { | |
1359 | /* Got a good (?) packet. */ | |
1360 | ei_receive(dev); | |
1361 | } | |
1362 | /* Push the next to-transmit packet through. */ | |
1363 | if (interrupts & ENISR_TX) | |
1364 | ei_tx_intr(dev); | |
1365 | else if (interrupts & ENISR_TX_ERR) | |
1366 | ei_tx_err(dev); | |
1367 | ||
1368 | if (interrupts & ENISR_COUNTERS) | |
1369 | { | |
1370 | ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); | |
1371 | ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); | |
1372 | ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | if (interrupts && ei_debug) | |
1377 | { | |
1378 | handled = 1; | |
1379 | if (nr_serviced >= MAX_SERVICE) | |
1380 | { | |
1381 | /* 0xFF is valid for a card removal */ | |
1382 | if(interrupts!=0xFF) | |
1383 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", | |
1384 | dev->name, interrupts); | |
1385 | outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ | |
1386 | } else { | |
1387 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); | |
1388 | outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | /* Turn 8390 interrupts back on. */ | |
1393 | ei_local->irqlock = 0; | |
1394 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1395 | ||
1396 | spin_unlock(&ei_local->page_lock); | |
1397 | return IRQ_RETVAL(handled); | |
1398 | } | |
1399 | ||
1400 | /** | |
1401 | * ei_tx_err - handle transmitter error | |
1402 | * @dev: network device which threw the exception | |
1403 | * | |
1404 | * A transmitter error has happened. Most likely excess collisions (which | |
1405 | * is a fairly normal condition). If the error is one where the Tx will | |
1406 | * have been aborted, we try and send another one right away, instead of | |
1407 | * letting the failed packet sit and collect dust in the Tx buffer. This | |
1408 | * is a much better solution as it avoids kernel based Tx timeouts, and | |
1409 | * an unnecessary card reset. | |
1410 | * | |
1411 | * Called with lock held. | |
1412 | */ | |
1413 | ||
1414 | static void ei_tx_err(struct net_device *dev) | |
1415 | { | |
1416 | long e8390_base = dev->base_addr; | |
1417 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1418 | unsigned char txsr = inb_p(e8390_base+EN0_TSR); | |
1419 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); | |
1420 | ||
1421 | #ifdef VERBOSE_ERROR_DUMP | |
1422 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); | |
1423 | if (txsr & ENTSR_ABT) | |
1424 | printk("excess-collisions "); | |
1425 | if (txsr & ENTSR_ND) | |
1426 | printk("non-deferral "); | |
1427 | if (txsr & ENTSR_CRS) | |
1428 | printk("lost-carrier "); | |
1429 | if (txsr & ENTSR_FU) | |
1430 | printk("FIFO-underrun "); | |
1431 | if (txsr & ENTSR_CDH) | |
1432 | printk("lost-heartbeat "); | |
1433 | printk("\n"); | |
1434 | #endif | |
1435 | ||
1436 | if (tx_was_aborted) | |
1437 | ei_tx_intr(dev); | |
1438 | else | |
1439 | { | |
1440 | ei_local->stat.tx_errors++; | |
1441 | if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++; | |
1442 | if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++; | |
1443 | if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++; | |
1444 | } | |
1445 | } | |
1446 | ||
1447 | /** | |
1448 | * ei_tx_intr - transmit interrupt handler | |
1449 | * @dev: network device for which tx intr is handled | |
1450 | * | |
1451 | * We have finished a transmit: check for errors and then trigger the next | |
1452 | * packet to be sent. Called with lock held. | |
1453 | */ | |
1454 | ||
1455 | static void ei_tx_intr(struct net_device *dev) | |
1456 | { | |
1457 | long e8390_base = dev->base_addr; | |
1458 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1459 | int status = inb(e8390_base + EN0_TSR); | |
1460 | ||
1461 | /* | |
1462 | * There are two Tx buffers, see which one finished, and trigger | |
1463 | * the send of another one if it exists. | |
1464 | */ | |
1465 | ei_local->txqueue--; | |
1466 | ||
1467 | if (ei_local->tx1 < 0) | |
1468 | { | |
1469 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) | |
1470 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", | |
1471 | ei_local->name, ei_local->lasttx, ei_local->tx1); | |
1472 | ei_local->tx1 = 0; | |
1473 | if (ei_local->tx2 > 0) | |
1474 | { | |
1475 | ei_local->txing = 1; | |
1476 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); | |
1477 | dev->trans_start = jiffies; | |
1478 | ei_local->tx2 = -1, | |
1479 | ei_local->lasttx = 2; | |
1480 | } | |
1481 | else ei_local->lasttx = 20, ei_local->txing = 0; | |
1482 | } | |
1483 | else if (ei_local->tx2 < 0) | |
1484 | { | |
1485 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) | |
1486 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", | |
1487 | ei_local->name, ei_local->lasttx, ei_local->tx2); | |
1488 | ei_local->tx2 = 0; | |
1489 | if (ei_local->tx1 > 0) | |
1490 | { | |
1491 | ei_local->txing = 1; | |
1492 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); | |
1493 | dev->trans_start = jiffies; | |
1494 | ei_local->tx1 = -1; | |
1495 | ei_local->lasttx = 1; | |
1496 | } | |
1497 | else | |
1498 | ei_local->lasttx = 10, ei_local->txing = 0; | |
1499 | } | |
1500 | // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", | |
1501 | // dev->name, ei_local->lasttx); | |
1502 | ||
1503 | /* Minimize Tx latency: update the statistics after we restart TXing. */ | |
1504 | if (status & ENTSR_COL) | |
1505 | ei_local->stat.collisions++; | |
1506 | if (status & ENTSR_PTX) | |
1507 | ei_local->stat.tx_packets++; | |
1508 | else | |
1509 | { | |
1510 | ei_local->stat.tx_errors++; | |
1511 | if (status & ENTSR_ABT) | |
1512 | { | |
1513 | ei_local->stat.tx_aborted_errors++; | |
1514 | ei_local->stat.collisions += 16; | |
1515 | } | |
1516 | if (status & ENTSR_CRS) | |
1517 | ei_local->stat.tx_carrier_errors++; | |
1518 | if (status & ENTSR_FU) | |
1519 | ei_local->stat.tx_fifo_errors++; | |
1520 | if (status & ENTSR_CDH) | |
1521 | ei_local->stat.tx_heartbeat_errors++; | |
1522 | if (status & ENTSR_OWC) | |
1523 | ei_local->stat.tx_window_errors++; | |
1524 | } | |
1525 | netif_wake_queue(dev); | |
1526 | } | |
1527 | ||
1528 | /** | |
1529 | * ei_receive - receive some packets | |
1530 | * @dev: network device with which receive will be run | |
1531 | * | |
1532 | * We have a good packet(s), get it/them out of the buffers. | |
1533 | * Called with lock held. | |
1534 | */ | |
1535 | ||
1536 | static void ei_receive(struct net_device *dev) | |
1537 | { | |
1538 | long e8390_base = dev->base_addr; | |
1539 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1540 | unsigned char rxing_page, this_frame, next_frame; | |
1541 | unsigned short current_offset; | |
1542 | int rx_pkt_count = 0; | |
1543 | struct e8390_pkt_hdr rx_frame; | |
1544 | ||
1545 | while (++rx_pkt_count < 10) | |
1546 | { | |
1547 | int pkt_len, pkt_stat; | |
1548 | ||
1549 | /* Get the rx page (incoming packet pointer). */ | |
1550 | rxing_page = inb_p(e8390_base + EN1_CURPAG -1); | |
1551 | ||
1552 | /* Remove one frame from the ring. Boundary is always a page behind. */ | |
1553 | this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; | |
1554 | if (this_frame >= ei_local->stop_page) | |
1555 | this_frame = ei_local->rx_start_page; | |
1556 | ||
1557 | /* Someday we'll omit the previous, iff we never get this message. | |
1558 | (There is at least one clone claimed to have a problem.) | |
1559 | ||
1560 | Keep quiet if it looks like a card removal. One problem here | |
1561 | is that some clones crash in roughly the same way. | |
1562 | */ | |
1563 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) | |
1564 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", | |
1565 | dev->name, this_frame, ei_local->current_page); | |
1566 | ||
1567 | if (this_frame == rxing_page) /* Read all the frames? */ | |
1568 | break; /* Done for now */ | |
1569 | ||
1570 | current_offset = this_frame << 8; | |
1571 | ei_get_8390_hdr(dev, &rx_frame, this_frame); | |
1572 | ||
1573 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); | |
1574 | pkt_stat = rx_frame.status; | |
1575 | ||
1576 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); | |
1577 | ||
1578 | if (pkt_len < 60 || pkt_len > 1518) | |
1579 | { | |
1580 | if (ei_debug) | |
1581 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", | |
1582 | dev->name, rx_frame.count, rx_frame.status, | |
1583 | rx_frame.next); | |
1584 | ei_local->stat.rx_errors++; | |
1585 | ei_local->stat.rx_length_errors++; | |
1586 | } | |
1587 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) | |
1588 | { | |
1589 | struct sk_buff *skb; | |
1590 | ||
1591 | skb = dev_alloc_skb(pkt_len+2); | |
1592 | if (skb == NULL) | |
1593 | { | |
1594 | if (ei_debug > 1) | |
1595 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", | |
1596 | dev->name, pkt_len); | |
1597 | ei_local->stat.rx_dropped++; | |
1598 | break; | |
1599 | } | |
1600 | else | |
1601 | { | |
1602 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ | |
1603 | skb->dev = dev; | |
1604 | skb_put(skb, pkt_len); /* Make room */ | |
1605 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); | |
1606 | skb->protocol=eth_type_trans(skb,dev); | |
1607 | netif_rx(skb); | |
1608 | dev->last_rx = jiffies; | |
1609 | ei_local->stat.rx_packets++; | |
1610 | ei_local->stat.rx_bytes += pkt_len; | |
1611 | if (pkt_stat & ENRSR_PHY) | |
1612 | ei_local->stat.multicast++; | |
1613 | } | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | if (ei_debug) | |
1618 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", | |
1619 | dev->name, rx_frame.status, rx_frame.next, | |
1620 | rx_frame.count); | |
1621 | ei_local->stat.rx_errors++; | |
1622 | /* NB: The NIC counts CRC, frame and missed errors. */ | |
1623 | if (pkt_stat & ENRSR_FO) | |
1624 | ei_local->stat.rx_fifo_errors++; | |
1625 | } | |
1626 | next_frame = rx_frame.next; | |
1627 | ||
1628 | /* This _should_ never happen: it's here for avoiding bad clones. */ | |
1629 | if (next_frame >= ei_local->stop_page) { | |
1630 | printk("%s: next frame inconsistency, %#2x\n", dev->name, | |
1631 | next_frame); | |
1632 | next_frame = ei_local->rx_start_page; | |
1633 | } | |
1634 | ei_local->current_page = next_frame; | |
1635 | outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); | |
1636 | } | |
1637 | ||
1638 | return; | |
1639 | } | |
1640 | ||
1641 | /** | |
1642 | * ei_rx_overrun - handle receiver overrun | |
1643 | * @dev: network device which threw exception | |
1644 | * | |
1645 | * We have a receiver overrun: we have to kick the 8390 to get it started | |
1646 | * again. Problem is that you have to kick it exactly as NS prescribes in | |
1647 | * the updated datasheets, or "the NIC may act in an unpredictable manner." | |
1648 | * This includes causing "the NIC to defer indefinitely when it is stopped | |
1649 | * on a busy network." Ugh. | |
1650 | * Called with lock held. Don't call this with the interrupts off or your | |
1651 | * computer will hate you - it takes 10ms or so. | |
1652 | */ | |
1653 | ||
1654 | static void ei_rx_overrun(struct net_device *dev) | |
1655 | { | |
1656 | axnet_dev_t *info = (axnet_dev_t *)dev; | |
1657 | long e8390_base = dev->base_addr; | |
1658 | unsigned char was_txing, must_resend = 0; | |
1659 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1660 | ||
1661 | /* | |
1662 | * Record whether a Tx was in progress and then issue the | |
1663 | * stop command. | |
1664 | */ | |
1665 | was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; | |
1666 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1667 | ||
1668 | if (ei_debug > 1) | |
1669 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); | |
1670 | ei_local->stat.rx_over_errors++; | |
1671 | ||
1672 | /* | |
1673 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. | |
1674 | * Early datasheets said to poll the reset bit, but now they say that | |
1675 | * it "is not a reliable indicator and subsequently should be ignored." | |
1676 | * We wait at least 10ms. | |
1677 | */ | |
1678 | ||
1679 | mdelay(10); | |
1680 | ||
1681 | /* | |
1682 | * Reset RBCR[01] back to zero as per magic incantation. | |
1683 | */ | |
1684 | outb_p(0x00, e8390_base+EN0_RCNTLO); | |
1685 | outb_p(0x00, e8390_base+EN0_RCNTHI); | |
1686 | ||
1687 | /* | |
1688 | * See if any Tx was interrupted or not. According to NS, this | |
1689 | * step is vital, and skipping it will cause no end of havoc. | |
1690 | */ | |
1691 | ||
1692 | if (was_txing) | |
1693 | { | |
1694 | unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); | |
1695 | if (!tx_completed) | |
1696 | must_resend = 1; | |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * Have to enter loopback mode and then restart the NIC before | |
1701 | * you are allowed to slurp packets up off the ring. | |
1702 | */ | |
1703 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); | |
1704 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); | |
1705 | ||
1706 | /* | |
1707 | * Clear the Rx ring of all the debris, and ack the interrupt. | |
1708 | */ | |
1709 | ei_receive(dev); | |
1710 | ||
1711 | /* | |
1712 | * Leave loopback mode, and resend any packet that got stopped. | |
1713 | */ | |
1714 | outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); | |
1715 | if (must_resend) | |
1716 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); | |
1717 | } | |
1718 | ||
1719 | /* | |
1720 | * Collect the stats. This is called unlocked and from several contexts. | |
1721 | */ | |
1722 | ||
1723 | static struct net_device_stats *get_stats(struct net_device *dev) | |
1724 | { | |
1725 | long ioaddr = dev->base_addr; | |
1726 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1727 | unsigned long flags; | |
1728 | ||
1729 | /* If the card is stopped, just return the present stats. */ | |
1730 | if (!netif_running(dev)) | |
1731 | return &ei_local->stat; | |
1732 | ||
1733 | spin_lock_irqsave(&ei_local->page_lock,flags); | |
1734 | /* Read the counter registers, assuming we are in page 0. */ | |
1735 | ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); | |
1736 | ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); | |
1737 | ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); | |
1738 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1739 | ||
1740 | return &ei_local->stat; | |
1741 | } | |
1742 | ||
1743 | /** | |
1744 | * do_set_multicast_list - set/clear multicast filter | |
1745 | * @dev: net device for which multicast filter is adjusted | |
1746 | * | |
1747 | * Set or clear the multicast filter for this adaptor. May be called | |
1748 | * from a BH in 2.1.x. Must be called with lock held. | |
1749 | */ | |
1750 | ||
1751 | static void do_set_multicast_list(struct net_device *dev) | |
1752 | { | |
1753 | long e8390_base = dev->base_addr; | |
1754 | ||
1755 | if(dev->flags&IFF_PROMISC) | |
1756 | outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); | |
1757 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) | |
1758 | outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); | |
1759 | else | |
1760 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); | |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * Called without lock held. This is invoked from user context and may | |
1765 | * be parallel to just about everything else. Its also fairly quick and | |
1766 | * not called too often. Must protect against both bh and irq users | |
1767 | */ | |
1768 | ||
1769 | static void set_multicast_list(struct net_device *dev) | |
1770 | { | |
1771 | unsigned long flags; | |
1772 | ||
1773 | spin_lock_irqsave(&dev_lock(dev), flags); | |
1774 | do_set_multicast_list(dev); | |
1775 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
1776 | } | |
1777 | ||
1778 | /** | |
1779 | * axdev_setup - init rest of 8390 device struct | |
1780 | * @dev: network device structure to init | |
1781 | * | |
1782 | * Initialize the rest of the 8390 device structure. Do NOT __init | |
1783 | * this, as it is used by 8390 based modular drivers too. | |
1784 | */ | |
1785 | ||
1786 | static void axdev_setup(struct net_device *dev) | |
1787 | { | |
1788 | struct ei_device *ei_local; | |
1789 | if (ei_debug > 1) | |
1790 | printk(version_8390); | |
1791 | ||
1792 | SET_MODULE_OWNER(dev); | |
1793 | ||
1794 | ||
1795 | ei_local = (struct ei_device *)netdev_priv(dev); | |
1796 | spin_lock_init(&ei_local->page_lock); | |
1797 | ||
1798 | dev->hard_start_xmit = &ei_start_xmit; | |
1799 | dev->get_stats = get_stats; | |
1800 | dev->set_multicast_list = &set_multicast_list; | |
1801 | ||
1802 | ether_setup(dev); | |
1803 | } | |
1804 | ||
1805 | /* This page of functions should be 8390 generic */ | |
1806 | /* Follow National Semi's recommendations for initializing the "NIC". */ | |
1807 | ||
1808 | /** | |
1809 | * AX88190_init - initialize 8390 hardware | |
1810 | * @dev: network device to initialize | |
1811 | * @startp: boolean. non-zero value to initiate chip processing | |
1812 | * | |
1813 | * Must be called with lock held. | |
1814 | */ | |
1815 | ||
1816 | static void AX88190_init(struct net_device *dev, int startp) | |
1817 | { | |
1818 | axnet_dev_t *info = PRIV(dev); | |
1819 | long e8390_base = dev->base_addr; | |
1820 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1821 | int i; | |
1822 | int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; | |
1823 | ||
1824 | if(sizeof(struct e8390_pkt_hdr)!=4) | |
1825 | panic("8390.c: header struct mispacked\n"); | |
1826 | /* Follow National Semi's recommendations for initing the DP83902. */ | |
1827 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ | |
1828 | outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ | |
1829 | /* Clear the remote byte count registers. */ | |
1830 | outb_p(0x00, e8390_base + EN0_RCNTLO); | |
1831 | outb_p(0x00, e8390_base + EN0_RCNTHI); | |
1832 | /* Set to monitor and loopback mode -- this is vital!. */ | |
1833 | outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ | |
1834 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ | |
1835 | /* Set the transmit page and receive ring. */ | |
1836 | outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); | |
1837 | ei_local->tx1 = ei_local->tx2 = 0; | |
1838 | outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); | |
1839 | outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ | |
1840 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ | |
1841 | outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); | |
1842 | /* Clear the pending interrupts and mask. */ | |
1843 | outb_p(0xFF, e8390_base + EN0_ISR); | |
1844 | outb_p(0x00, e8390_base + EN0_IMR); | |
1845 | ||
1846 | /* Copy the station address into the DS8390 registers. */ | |
1847 | ||
1848 | outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ | |
1849 | for(i = 0; i < 6; i++) | |
1850 | { | |
1851 | outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); | |
1852 | if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) | |
1853 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); | |
1854 | } | |
1855 | /* | |
1856 | * Initialize the multicast list to accept-all. If we enable multicast | |
1857 | * the higher levels can do the filtering. | |
1858 | */ | |
1859 | for (i = 0; i < 8; i++) | |
1860 | outb_p(0xff, e8390_base + EN1_MULT + i); | |
1861 | ||
1862 | outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); | |
1863 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1864 | ||
1865 | netif_start_queue(dev); | |
1866 | ei_local->tx1 = ei_local->tx2 = 0; | |
1867 | ei_local->txing = 0; | |
1868 | ||
1869 | if (startp) | |
1870 | { | |
1871 | outb_p(0xff, e8390_base + EN0_ISR); | |
1872 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1873 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1874 | outb_p(E8390_TXCONFIG | info->duplex_flag, | |
1875 | e8390_base + EN0_TXCR); /* xmit on. */ | |
1876 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ | |
1877 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ | |
1878 | do_set_multicast_list(dev); /* (re)load the mcast table */ | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | /* Trigger a transmit start, assuming the length is valid. | |
1883 | Always called with the page lock held */ | |
1884 | ||
1885 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1886 | int start_page) | |
1887 | { | |
1888 | long e8390_base = dev->base_addr; | |
1889 | struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev); | |
1890 | ||
1891 | if (inb_p(e8390_base) & E8390_TRANS) | |
1892 | { | |
1893 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", | |
1894 | dev->name); | |
1895 | return; | |
1896 | } | |
1897 | outb_p(length & 0xff, e8390_base + EN0_TCNTLO); | |
1898 | outb_p(length >> 8, e8390_base + EN0_TCNTHI); | |
1899 | outb_p(start_page, e8390_base + EN0_TPSR); | |
1900 | outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); | |
1901 | } |