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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 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
28 | ||
29 | #include <linux/kernel.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/ptrace.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/timer.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/spinlock.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/etherdevice.h> | |
39 | #include <linux/crc32.h> | |
40 | #include <linux/mii.h> | |
41 | #include "../8390.h" | |
42 | ||
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 | ||
77 | /*====================================================================*/ | |
78 | ||
79 | static int axnet_config(struct pcmcia_device *link); | |
80 | static void axnet_release(struct pcmcia_device *link); | |
81 | static int axnet_open(struct net_device *dev); | |
82 | static int axnet_close(struct net_device *dev); | |
83 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
84 | static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, | |
85 | struct net_device *dev); | |
86 | static struct net_device_stats *get_stats(struct net_device *dev); | |
87 | static void set_multicast_list(struct net_device *dev); | |
88 | static void axnet_tx_timeout(struct net_device *dev); | |
89 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id); | |
90 | static void ei_watchdog(u_long arg); | |
91 | static void axnet_reset_8390(struct net_device *dev); | |
92 | ||
93 | static int mdio_read(unsigned int addr, int phy_id, int loc); | |
94 | static void mdio_write(unsigned int addr, int phy_id, int loc, int value); | |
95 | ||
96 | static void get_8390_hdr(struct net_device *, | |
97 | struct e8390_pkt_hdr *, int); | |
98 | static void block_input(struct net_device *dev, int count, | |
99 | struct sk_buff *skb, int ring_offset); | |
100 | static void block_output(struct net_device *dev, int count, | |
101 | const u_char *buf, const int start_page); | |
102 | ||
103 | static void axnet_detach(struct pcmcia_device *p_dev); | |
104 | ||
105 | static void AX88190_init(struct net_device *dev, int startp); | |
106 | static int ax_open(struct net_device *dev); | |
107 | static int ax_close(struct net_device *dev); | |
108 | static irqreturn_t ax_interrupt(int irq, void *dev_id); | |
109 | ||
110 | /*====================================================================*/ | |
111 | ||
112 | typedef struct axnet_dev_t { | |
113 | struct pcmcia_device *p_dev; | |
114 | caddr_t base; | |
115 | struct timer_list watchdog; | |
116 | int stale, fast_poll; | |
117 | u_short link_status; | |
118 | u_char duplex_flag; | |
119 | int phy_id; | |
120 | int flags; | |
121 | int active_low; | |
122 | } axnet_dev_t; | |
123 | ||
124 | static inline axnet_dev_t *PRIV(struct net_device *dev) | |
125 | { | |
126 | void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device); | |
127 | return p; | |
128 | } | |
129 | ||
130 | static const struct net_device_ops axnet_netdev_ops = { | |
131 | .ndo_open = axnet_open, | |
132 | .ndo_stop = axnet_close, | |
133 | .ndo_do_ioctl = axnet_ioctl, | |
134 | .ndo_start_xmit = axnet_start_xmit, | |
135 | .ndo_tx_timeout = axnet_tx_timeout, | |
136 | .ndo_get_stats = get_stats, | |
137 | .ndo_set_multicast_list = set_multicast_list, | |
138 | .ndo_change_mtu = eth_change_mtu, | |
139 | .ndo_set_mac_address = eth_mac_addr, | |
140 | .ndo_validate_addr = eth_validate_addr, | |
141 | }; | |
142 | ||
143 | static int axnet_probe(struct pcmcia_device *link) | |
144 | { | |
145 | axnet_dev_t *info; | |
146 | struct net_device *dev; | |
147 | struct ei_device *ei_local; | |
148 | ||
149 | dev_dbg(&link->dev, "axnet_attach()\n"); | |
150 | ||
151 | dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t)); | |
152 | if (!dev) | |
153 | return -ENOMEM; | |
154 | ||
155 | ei_local = netdev_priv(dev); | |
156 | spin_lock_init(&ei_local->page_lock); | |
157 | ||
158 | info = PRIV(dev); | |
159 | info->p_dev = link; | |
160 | link->priv = dev; | |
161 | link->config_flags |= CONF_ENABLE_IRQ; | |
162 | ||
163 | dev->netdev_ops = &axnet_netdev_ops; | |
164 | ||
165 | dev->watchdog_timeo = TX_TIMEOUT; | |
166 | ||
167 | return axnet_config(link); | |
168 | } /* axnet_attach */ | |
169 | ||
170 | static void axnet_detach(struct pcmcia_device *link) | |
171 | { | |
172 | struct net_device *dev = link->priv; | |
173 | ||
174 | dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link); | |
175 | ||
176 | unregister_netdev(dev); | |
177 | ||
178 | axnet_release(link); | |
179 | ||
180 | free_netdev(dev); | |
181 | } /* axnet_detach */ | |
182 | ||
183 | /*====================================================================== | |
184 | ||
185 | This probes for a card's hardware address by reading the PROM. | |
186 | ||
187 | ======================================================================*/ | |
188 | ||
189 | static int get_prom(struct pcmcia_device *link) | |
190 | { | |
191 | struct net_device *dev = link->priv; | |
192 | unsigned int ioaddr = dev->base_addr; | |
193 | int i, j; | |
194 | ||
195 | /* This is based on drivers/net/ne.c */ | |
196 | struct { | |
197 | u_char value, offset; | |
198 | } program_seq[] = { | |
199 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ | |
200 | {0x01, EN0_DCFG}, /* Set word-wide access. */ | |
201 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ | |
202 | {0x00, EN0_RCNTHI}, | |
203 | {0x00, EN0_IMR}, /* Mask completion irq. */ | |
204 | {0xFF, EN0_ISR}, | |
205 | {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */ | |
206 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ | |
207 | {0x10, EN0_RCNTLO}, | |
208 | {0x00, EN0_RCNTHI}, | |
209 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */ | |
210 | {0x04, EN0_RSARHI}, | |
211 | {E8390_RREAD+E8390_START, E8390_CMD}, | |
212 | }; | |
213 | ||
214 | /* Not much of a test, but the alternatives are messy */ | |
215 | if (link->config_base != 0x03c0) | |
216 | return 0; | |
217 | ||
218 | axnet_reset_8390(dev); | |
219 | mdelay(10); | |
220 | ||
221 | for (i = 0; i < ARRAY_SIZE(program_seq); i++) | |
222 | outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); | |
223 | ||
224 | for (i = 0; i < 6; i += 2) { | |
225 | j = inw(ioaddr + AXNET_DATAPORT); | |
226 | dev->dev_addr[i] = j & 0xff; | |
227 | dev->dev_addr[i+1] = j >> 8; | |
228 | } | |
229 | return 1; | |
230 | } /* get_prom */ | |
231 | ||
232 | static int try_io_port(struct pcmcia_device *link) | |
233 | { | |
234 | int j, ret; | |
235 | link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
236 | link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH; | |
237 | if (link->resource[0]->end == 32) { | |
238 | link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; | |
239 | /* for master/slave multifunction cards */ | |
240 | if (link->resource[1]->end > 0) | |
241 | link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8; | |
242 | } else { | |
243 | /* This should be two 16-port windows */ | |
244 | link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
245 | link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16; | |
246 | } | |
247 | if (link->resource[0]->start == 0) { | |
248 | for (j = 0; j < 0x400; j += 0x20) { | |
249 | link->resource[0]->start = j ^ 0x300; | |
250 | link->resource[1]->start = (j ^ 0x300) + 0x10; | |
251 | link->io_lines = 16; | |
252 | ret = pcmcia_request_io(link); | |
253 | if (ret == 0) | |
254 | return ret; | |
255 | } | |
256 | return ret; | |
257 | } else { | |
258 | return pcmcia_request_io(link); | |
259 | } | |
260 | } | |
261 | ||
262 | static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data) | |
263 | { | |
264 | if (p_dev->config_index == 0) | |
265 | return -EINVAL; | |
266 | ||
267 | p_dev->config_index = 0x05; | |
268 | if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32) | |
269 | return -ENODEV; | |
270 | ||
271 | return try_io_port(p_dev); | |
272 | } | |
273 | ||
274 | static int axnet_config(struct pcmcia_device *link) | |
275 | { | |
276 | struct net_device *dev = link->priv; | |
277 | axnet_dev_t *info = PRIV(dev); | |
278 | int i, j, j2, ret; | |
279 | ||
280 | dev_dbg(&link->dev, "axnet_config(0x%p)\n", link); | |
281 | ||
282 | /* don't trust the CIS on this; Linksys got it wrong */ | |
283 | link->config_regs = 0x63; | |
284 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; | |
285 | ret = pcmcia_loop_config(link, axnet_configcheck, NULL); | |
286 | if (ret != 0) | |
287 | goto failed; | |
288 | ||
289 | if (!link->irq) | |
290 | goto failed; | |
291 | ||
292 | if (resource_size(link->resource[1]) == 8) | |
293 | link->config_flags |= CONF_ENABLE_SPKR; | |
294 | ||
295 | ret = pcmcia_enable_device(link); | |
296 | if (ret) | |
297 | goto failed; | |
298 | ||
299 | dev->irq = link->irq; | |
300 | dev->base_addr = link->resource[0]->start; | |
301 | ||
302 | if (!get_prom(link)) { | |
303 | pr_notice("this is not an AX88190 card!\n"); | |
304 | pr_notice("use pcnet_cs instead.\n"); | |
305 | goto failed; | |
306 | } | |
307 | ||
308 | ei_status.name = "AX88190"; | |
309 | ei_status.word16 = 1; | |
310 | ei_status.tx_start_page = AXNET_START_PG; | |
311 | ei_status.rx_start_page = AXNET_START_PG + TX_PAGES; | |
312 | ei_status.stop_page = AXNET_STOP_PG; | |
313 | ei_status.reset_8390 = axnet_reset_8390; | |
314 | ei_status.get_8390_hdr = get_8390_hdr; | |
315 | ei_status.block_input = block_input; | |
316 | ei_status.block_output = block_output; | |
317 | ||
318 | if (inb(dev->base_addr + AXNET_TEST) != 0) | |
319 | info->flags |= IS_AX88790; | |
320 | else | |
321 | info->flags |= IS_AX88190; | |
322 | ||
323 | if (info->flags & IS_AX88790) | |
324 | outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */ | |
325 | ||
326 | info->active_low = 0; | |
327 | ||
328 | for (i = 0; i < 32; i++) { | |
329 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
330 | j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); | |
331 | if (j == j2) continue; | |
332 | if ((j != 0) && (j != 0xffff)) break; | |
333 | } | |
334 | ||
335 | if (i == 32) { | |
336 | /* Maybe PHY is in power down mode. (PPD_SET = 1) | |
337 | Bit 2 of CCSR is active low. */ | |
338 | pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); | |
339 | for (i = 0; i < 32; i++) { | |
340 | j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); | |
341 | j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); | |
342 | if (j == j2) continue; | |
343 | if ((j != 0) && (j != 0xffff)) { | |
344 | info->active_low = 1; | |
345 | break; | |
346 | } | |
347 | } | |
348 | } | |
349 | ||
350 | info->phy_id = (i < 32) ? i : -1; | |
351 | SET_NETDEV_DEV(dev, &link->dev); | |
352 | ||
353 | if (register_netdev(dev) != 0) { | |
354 | pr_notice("register_netdev() failed\n"); | |
355 | goto failed; | |
356 | } | |
357 | ||
358 | netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n", | |
359 | ((info->flags & IS_AX88790) ? 7 : 1), | |
360 | dev->base_addr, dev->irq, dev->dev_addr); | |
361 | if (info->phy_id != -1) { | |
362 | netdev_dbg(dev, " MII transceiver at index %d, status %x\n", | |
363 | info->phy_id, j); | |
364 | } else { | |
365 | netdev_notice(dev, " No MII transceivers found!\n"); | |
366 | } | |
367 | return 0; | |
368 | ||
369 | failed: | |
370 | axnet_release(link); | |
371 | return -ENODEV; | |
372 | } /* axnet_config */ | |
373 | ||
374 | static void axnet_release(struct pcmcia_device *link) | |
375 | { | |
376 | pcmcia_disable_device(link); | |
377 | } | |
378 | ||
379 | static int axnet_suspend(struct pcmcia_device *link) | |
380 | { | |
381 | struct net_device *dev = link->priv; | |
382 | ||
383 | if (link->open) | |
384 | netif_device_detach(dev); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | static int axnet_resume(struct pcmcia_device *link) | |
390 | { | |
391 | struct net_device *dev = link->priv; | |
392 | axnet_dev_t *info = PRIV(dev); | |
393 | ||
394 | if (link->open) { | |
395 | if (info->active_low == 1) | |
396 | pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); | |
397 | ||
398 | axnet_reset_8390(dev); | |
399 | AX88190_init(dev, 1); | |
400 | netif_device_attach(dev); | |
401 | } | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | ||
407 | /*====================================================================== | |
408 | ||
409 | MII interface support | |
410 | ||
411 | ======================================================================*/ | |
412 | ||
413 | #define MDIO_SHIFT_CLK 0x01 | |
414 | #define MDIO_DATA_WRITE0 0x00 | |
415 | #define MDIO_DATA_WRITE1 0x08 | |
416 | #define MDIO_DATA_READ 0x04 | |
417 | #define MDIO_MASK 0x0f | |
418 | #define MDIO_ENB_IN 0x02 | |
419 | ||
420 | static void mdio_sync(unsigned int addr) | |
421 | { | |
422 | int bits; | |
423 | for (bits = 0; bits < 32; bits++) { | |
424 | outb_p(MDIO_DATA_WRITE1, addr); | |
425 | outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr); | |
426 | } | |
427 | } | |
428 | ||
429 | static int mdio_read(unsigned int addr, int phy_id, int loc) | |
430 | { | |
431 | u_int cmd = (0xf6<<10)|(phy_id<<5)|loc; | |
432 | int i, retval = 0; | |
433 | ||
434 | mdio_sync(addr); | |
435 | for (i = 14; i >= 0; i--) { | |
436 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
437 | outb_p(dat, addr); | |
438 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
439 | } | |
440 | for (i = 19; i > 0; i--) { | |
441 | outb_p(MDIO_ENB_IN, addr); | |
442 | retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0); | |
443 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
444 | } | |
445 | return (retval>>1) & 0xffff; | |
446 | } | |
447 | ||
448 | static void mdio_write(unsigned int addr, int phy_id, int loc, int value) | |
449 | { | |
450 | u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value; | |
451 | int i; | |
452 | ||
453 | mdio_sync(addr); | |
454 | for (i = 31; i >= 0; i--) { | |
455 | int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; | |
456 | outb_p(dat, addr); | |
457 | outb_p(dat | MDIO_SHIFT_CLK, addr); | |
458 | } | |
459 | for (i = 1; i >= 0; i--) { | |
460 | outb_p(MDIO_ENB_IN, addr); | |
461 | outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); | |
462 | } | |
463 | } | |
464 | ||
465 | /*====================================================================*/ | |
466 | ||
467 | static int axnet_open(struct net_device *dev) | |
468 | { | |
469 | int ret; | |
470 | axnet_dev_t *info = PRIV(dev); | |
471 | struct pcmcia_device *link = info->p_dev; | |
472 | unsigned int nic_base = dev->base_addr; | |
473 | ||
474 | dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name); | |
475 | ||
476 | if (!pcmcia_dev_present(link)) | |
477 | return -ENODEV; | |
478 | ||
479 | outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */ | |
480 | ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev); | |
481 | if (ret) | |
482 | return ret; | |
483 | ||
484 | link->open++; | |
485 | ||
486 | info->link_status = 0x00; | |
487 | init_timer(&info->watchdog); | |
488 | info->watchdog.function = ei_watchdog; | |
489 | info->watchdog.data = (u_long)dev; | |
490 | info->watchdog.expires = jiffies + HZ; | |
491 | add_timer(&info->watchdog); | |
492 | ||
493 | return ax_open(dev); | |
494 | } /* axnet_open */ | |
495 | ||
496 | /*====================================================================*/ | |
497 | ||
498 | static int axnet_close(struct net_device *dev) | |
499 | { | |
500 | axnet_dev_t *info = PRIV(dev); | |
501 | struct pcmcia_device *link = info->p_dev; | |
502 | ||
503 | dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name); | |
504 | ||
505 | ax_close(dev); | |
506 | free_irq(dev->irq, dev); | |
507 | ||
508 | link->open--; | |
509 | netif_stop_queue(dev); | |
510 | del_timer_sync(&info->watchdog); | |
511 | ||
512 | return 0; | |
513 | } /* axnet_close */ | |
514 | ||
515 | /*====================================================================== | |
516 | ||
517 | Hard reset the card. This used to pause for the same period that | |
518 | a 8390 reset command required, but that shouldn't be necessary. | |
519 | ||
520 | ======================================================================*/ | |
521 | ||
522 | static void axnet_reset_8390(struct net_device *dev) | |
523 | { | |
524 | unsigned int nic_base = dev->base_addr; | |
525 | int i; | |
526 | ||
527 | ei_status.txing = ei_status.dmaing = 0; | |
528 | ||
529 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD); | |
530 | ||
531 | outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET); | |
532 | ||
533 | for (i = 0; i < 100; i++) { | |
534 | if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0) | |
535 | break; | |
536 | udelay(100); | |
537 | } | |
538 | outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */ | |
539 | ||
540 | if (i == 100) | |
541 | netdev_err(dev, "axnet_reset_8390() did not complete\n"); | |
542 | ||
543 | } /* axnet_reset_8390 */ | |
544 | ||
545 | /*====================================================================*/ | |
546 | ||
547 | static irqreturn_t ei_irq_wrapper(int irq, void *dev_id) | |
548 | { | |
549 | struct net_device *dev = dev_id; | |
550 | PRIV(dev)->stale = 0; | |
551 | return ax_interrupt(irq, dev_id); | |
552 | } | |
553 | ||
554 | static void ei_watchdog(u_long arg) | |
555 | { | |
556 | struct net_device *dev = (struct net_device *)(arg); | |
557 | axnet_dev_t *info = PRIV(dev); | |
558 | unsigned int nic_base = dev->base_addr; | |
559 | unsigned int mii_addr = nic_base + AXNET_MII_EEP; | |
560 | u_short link; | |
561 | ||
562 | if (!netif_device_present(dev)) goto reschedule; | |
563 | ||
564 | /* Check for pending interrupt with expired latency timer: with | |
565 | this, we can limp along even if the interrupt is blocked */ | |
566 | if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) { | |
567 | if (!info->fast_poll) | |
568 | netdev_info(dev, "interrupt(s) dropped!\n"); | |
569 | ei_irq_wrapper(dev->irq, dev); | |
570 | info->fast_poll = HZ; | |
571 | } | |
572 | if (info->fast_poll) { | |
573 | info->fast_poll--; | |
574 | info->watchdog.expires = jiffies + 1; | |
575 | add_timer(&info->watchdog); | |
576 | return; | |
577 | } | |
578 | ||
579 | if (info->phy_id < 0) | |
580 | goto reschedule; | |
581 | link = mdio_read(mii_addr, info->phy_id, 1); | |
582 | if (!link || (link == 0xffff)) { | |
583 | netdev_info(dev, "MII is missing!\n"); | |
584 | info->phy_id = -1; | |
585 | goto reschedule; | |
586 | } | |
587 | ||
588 | link &= 0x0004; | |
589 | if (link != info->link_status) { | |
590 | u_short p = mdio_read(mii_addr, info->phy_id, 5); | |
591 | netdev_info(dev, "%s link beat\n", link ? "found" : "lost"); | |
592 | if (link) { | |
593 | info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00; | |
594 | if (p) | |
595 | netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n", | |
596 | (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H'); | |
597 | else | |
598 | netdev_info(dev, "link partner did not autonegotiate\n"); | |
599 | AX88190_init(dev, 1); | |
600 | } | |
601 | info->link_status = link; | |
602 | } | |
603 | ||
604 | reschedule: | |
605 | info->watchdog.expires = jiffies + HZ; | |
606 | add_timer(&info->watchdog); | |
607 | } | |
608 | ||
609 | /*====================================================================*/ | |
610 | ||
611 | static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
612 | { | |
613 | axnet_dev_t *info = PRIV(dev); | |
614 | struct mii_ioctl_data *data = if_mii(rq); | |
615 | unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP; | |
616 | switch (cmd) { | |
617 | case SIOCGMIIPHY: | |
618 | data->phy_id = info->phy_id; | |
619 | case SIOCGMIIREG: /* Read MII PHY register. */ | |
620 | data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f); | |
621 | return 0; | |
622 | case SIOCSMIIREG: /* Write MII PHY register. */ | |
623 | mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in); | |
624 | return 0; | |
625 | } | |
626 | return -EOPNOTSUPP; | |
627 | } | |
628 | ||
629 | /*====================================================================*/ | |
630 | ||
631 | static void get_8390_hdr(struct net_device *dev, | |
632 | struct e8390_pkt_hdr *hdr, | |
633 | int ring_page) | |
634 | { | |
635 | unsigned int nic_base = dev->base_addr; | |
636 | ||
637 | outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ | |
638 | outb_p(ring_page, nic_base + EN0_RSARHI); | |
639 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
640 | ||
641 | insw(nic_base + AXNET_DATAPORT, hdr, | |
642 | sizeof(struct e8390_pkt_hdr)>>1); | |
643 | /* Fix for big endian systems */ | |
644 | hdr->count = le16_to_cpu(hdr->count); | |
645 | ||
646 | } | |
647 | ||
648 | /*====================================================================*/ | |
649 | ||
650 | static void block_input(struct net_device *dev, int count, | |
651 | struct sk_buff *skb, int ring_offset) | |
652 | { | |
653 | unsigned int nic_base = dev->base_addr; | |
654 | int xfer_count = count; | |
655 | char *buf = skb->data; | |
656 | ||
657 | if ((ei_debug > 4) && (count != 4)) | |
658 | pr_debug("%s: [bi=%d]\n", dev->name, count+4); | |
659 | outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); | |
660 | outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); | |
661 | outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); | |
662 | ||
663 | insw(nic_base + AXNET_DATAPORT,buf,count>>1); | |
664 | if (count & 0x01) | |
665 | buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++; | |
666 | ||
667 | } | |
668 | ||
669 | /*====================================================================*/ | |
670 | ||
671 | static void block_output(struct net_device *dev, int count, | |
672 | const u_char *buf, const int start_page) | |
673 | { | |
674 | unsigned int nic_base = dev->base_addr; | |
675 | ||
676 | pr_debug("%s: [bo=%d]\n", dev->name, count); | |
677 | ||
678 | /* Round the count up for word writes. Do we need to do this? | |
679 | What effect will an odd byte count have on the 8390? | |
680 | I should check someday. */ | |
681 | if (count & 0x01) | |
682 | count++; | |
683 | ||
684 | outb_p(0x00, nic_base + EN0_RSARLO); | |
685 | outb_p(start_page, nic_base + EN0_RSARHI); | |
686 | outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD); | |
687 | outsw(nic_base + AXNET_DATAPORT, buf, count>>1); | |
688 | } | |
689 | ||
690 | static struct pcmcia_device_id axnet_ids[] = { | |
691 | PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081), | |
692 | PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301), | |
693 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301), | |
694 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303), | |
695 | PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309), | |
696 | PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106), | |
697 | PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab), | |
698 | PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), | |
699 | PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090), | |
700 | PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc), | |
701 | PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef), | |
702 | PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef), | |
703 | PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1), | |
704 | PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc), | |
705 | PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b), | |
706 | PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5), | |
707 | PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e), | |
708 | PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061), | |
709 | PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90), | |
710 | PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2), | |
711 | PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8), | |
712 | PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609), | |
713 | PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875), | |
714 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04), | |
715 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116), | |
716 | PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058), | |
717 | PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef), | |
718 | PCMCIA_DEVICE_NULL, | |
719 | }; | |
720 | MODULE_DEVICE_TABLE(pcmcia, axnet_ids); | |
721 | ||
722 | static struct pcmcia_driver axnet_cs_driver = { | |
723 | .owner = THIS_MODULE, | |
724 | .name = "axnet_cs", | |
725 | .probe = axnet_probe, | |
726 | .remove = axnet_detach, | |
727 | .id_table = axnet_ids, | |
728 | .suspend = axnet_suspend, | |
729 | .resume = axnet_resume, | |
730 | }; | |
731 | ||
732 | static int __init init_axnet_cs(void) | |
733 | { | |
734 | return pcmcia_register_driver(&axnet_cs_driver); | |
735 | } | |
736 | ||
737 | static void __exit exit_axnet_cs(void) | |
738 | { | |
739 | pcmcia_unregister_driver(&axnet_cs_driver); | |
740 | } | |
741 | ||
742 | module_init(init_axnet_cs); | |
743 | module_exit(exit_axnet_cs); | |
744 | ||
745 | /*====================================================================*/ | |
746 | ||
747 | /* 8390.c: A general NS8390 ethernet driver core for linux. */ | |
748 | /* | |
749 | Written 1992-94 by Donald Becker. | |
750 | ||
751 | Copyright 1993 United States Government as represented by the | |
752 | Director, National Security Agency. | |
753 | ||
754 | This software may be used and distributed according to the terms | |
755 | of the GNU General Public License, incorporated herein by reference. | |
756 | ||
757 | The author may be reached as becker@scyld.com, or C/O | |
758 | Scyld Computing Corporation | |
759 | 410 Severn Ave., Suite 210 | |
760 | Annapolis MD 21403 | |
761 | ||
762 | This is the chip-specific code for many 8390-based ethernet adaptors. | |
763 | This is not a complete driver, it must be combined with board-specific | |
764 | code such as ne.c, wd.c, 3c503.c, etc. | |
765 | ||
766 | Seeing how at least eight drivers use this code, (not counting the | |
767 | PCMCIA ones either) it is easy to break some card by what seems like | |
768 | a simple innocent change. Please contact me or Donald if you think | |
769 | you have found something that needs changing. -- PG | |
770 | ||
771 | Changelog: | |
772 | ||
773 | Paul Gortmaker : remove set_bit lock, other cleanups. | |
774 | Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to | |
775 | ei_block_input() for eth_io_copy_and_sum(). | |
776 | Paul Gortmaker : exchange static int ei_pingpong for a #define, | |
777 | also add better Tx error handling. | |
778 | Paul Gortmaker : rewrite Rx overrun handling as per NS specs. | |
779 | Alexey Kuznetsov : use the 8390's six bit hash multicast filter. | |
780 | Paul Gortmaker : tweak ANK's above multicast changes a bit. | |
781 | Paul Gortmaker : update packet statistics for v2.1.x | |
782 | Alan Cox : support arbitary stupid port mappings on the | |
783 | 68K Macintosh. Support >16bit I/O spaces | |
784 | Paul Gortmaker : add kmod support for auto-loading of the 8390 | |
785 | module by all drivers that require it. | |
786 | Alan Cox : Spinlocking work, added 'BUG_83C690' | |
787 | Paul Gortmaker : Separate out Tx timeout code from Tx path. | |
788 | ||
789 | Sources: | |
790 | The National Semiconductor LAN Databook, and the 3Com 3c503 databook. | |
791 | ||
792 | */ | |
793 | ||
794 | #include <linux/bitops.h> | |
795 | #include <asm/irq.h> | |
796 | #include <linux/fcntl.h> | |
797 | #include <linux/in.h> | |
798 | #include <linux/interrupt.h> | |
799 | ||
800 | #define BUG_83C690 | |
801 | ||
802 | /* These are the operational function interfaces to board-specific | |
803 | routines. | |
804 | void reset_8390(struct net_device *dev) | |
805 | Resets the board associated with DEV, including a hardware reset of | |
806 | the 8390. This is only called when there is a transmit timeout, and | |
807 | it is always followed by 8390_init(). | |
808 | void block_output(struct net_device *dev, int count, const unsigned char *buf, | |
809 | int start_page) | |
810 | Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The | |
811 | "page" value uses the 8390's 256-byte pages. | |
812 | void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) | |
813 | Read the 4 byte, page aligned 8390 header. *If* there is a | |
814 | subsequent read, it will be of the rest of the packet. | |
815 | void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
816 | Read COUNT bytes from the packet buffer into the skb data area. Start | |
817 | reading from RING_OFFSET, the address as the 8390 sees it. This will always | |
818 | follow the read of the 8390 header. | |
819 | */ | |
820 | #define ei_reset_8390 (ei_local->reset_8390) | |
821 | #define ei_block_output (ei_local->block_output) | |
822 | #define ei_block_input (ei_local->block_input) | |
823 | #define ei_get_8390_hdr (ei_local->get_8390_hdr) | |
824 | ||
825 | /* use 0 for production, 1 for verification, >2 for debug */ | |
826 | #ifndef ei_debug | |
827 | int ei_debug = 1; | |
828 | #endif | |
829 | ||
830 | /* Index to functions. */ | |
831 | static void ei_tx_intr(struct net_device *dev); | |
832 | static void ei_tx_err(struct net_device *dev); | |
833 | static void ei_receive(struct net_device *dev); | |
834 | static void ei_rx_overrun(struct net_device *dev); | |
835 | ||
836 | /* Routines generic to NS8390-based boards. */ | |
837 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
838 | int start_page); | |
839 | static void do_set_multicast_list(struct net_device *dev); | |
840 | ||
841 | /* | |
842 | * SMP and the 8390 setup. | |
843 | * | |
844 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is | |
845 | * a page register that controls bank and packet buffer access. We guard | |
846 | * this with ei_local->page_lock. Nobody should assume or set the page other | |
847 | * than zero when the lock is not held. Lock holders must restore page 0 | |
848 | * before unlocking. Even pure readers must take the lock to protect in | |
849 | * page 0. | |
850 | * | |
851 | * To make life difficult the chip can also be very slow. We therefore can't | |
852 | * just use spinlocks. For the longer lockups we disable the irq the device | |
853 | * sits on and hold the lock. We must hold the lock because there is a dual | |
854 | * processor case other than interrupts (get stats/set multicast list in | |
855 | * parallel with each other and transmit). | |
856 | * | |
857 | * Note: in theory we can just disable the irq on the card _but_ there is | |
858 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" | |
859 | * enter lock, take the queued irq. So we waddle instead of flying. | |
860 | * | |
861 | * Finally by special arrangement for the purpose of being generally | |
862 | * annoying the transmit function is called bh atomic. That places | |
863 | * restrictions on the user context callers as disable_irq won't save | |
864 | * them. | |
865 | */ | |
866 | ||
867 | /** | |
868 | * ax_open - Open/initialize the board. | |
869 | * @dev: network device to initialize | |
870 | * | |
871 | * This routine goes all-out, setting everything | |
872 | * up anew at each open, even though many of these registers should only | |
873 | * need to be set once at boot. | |
874 | */ | |
875 | static int ax_open(struct net_device *dev) | |
876 | { | |
877 | unsigned long flags; | |
878 | struct ei_device *ei_local = netdev_priv(dev); | |
879 | ||
880 | /* | |
881 | * Grab the page lock so we own the register set, then call | |
882 | * the init function. | |
883 | */ | |
884 | ||
885 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
886 | AX88190_init(dev, 1); | |
887 | /* Set the flag before we drop the lock, That way the IRQ arrives | |
888 | after its set and we get no silly warnings */ | |
889 | netif_start_queue(dev); | |
890 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
891 | ei_local->irqlock = 0; | |
892 | return 0; | |
893 | } | |
894 | ||
895 | #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) | |
896 | ||
897 | /** | |
898 | * ax_close - shut down network device | |
899 | * @dev: network device to close | |
900 | * | |
901 | * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. | |
902 | */ | |
903 | static int ax_close(struct net_device *dev) | |
904 | { | |
905 | unsigned long flags; | |
906 | ||
907 | /* | |
908 | * Hold the page lock during close | |
909 | */ | |
910 | ||
911 | spin_lock_irqsave(&dev_lock(dev), flags); | |
912 | AX88190_init(dev, 0); | |
913 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
914 | netif_stop_queue(dev); | |
915 | return 0; | |
916 | } | |
917 | ||
918 | /** | |
919 | * axnet_tx_timeout - handle transmit time out condition | |
920 | * @dev: network device which has apparently fallen asleep | |
921 | * | |
922 | * Called by kernel when device never acknowledges a transmit has | |
923 | * completed (or failed) - i.e. never posted a Tx related interrupt. | |
924 | */ | |
925 | ||
926 | static void axnet_tx_timeout(struct net_device *dev) | |
927 | { | |
928 | long e8390_base = dev->base_addr; | |
929 | struct ei_device *ei_local = netdev_priv(dev); | |
930 | int txsr, isr, tickssofar = jiffies - dev_trans_start(dev); | |
931 | unsigned long flags; | |
932 | ||
933 | dev->stats.tx_errors++; | |
934 | ||
935 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
936 | txsr = inb(e8390_base+EN0_TSR); | |
937 | isr = inb(e8390_base+EN0_ISR); | |
938 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
939 | ||
940 | netdev_printk(KERN_DEBUG, dev, | |
941 | "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", | |
942 | (txsr & ENTSR_ABT) ? "excess collisions." : | |
943 | (isr) ? "lost interrupt?" : "cable problem?", | |
944 | txsr, isr, tickssofar); | |
945 | ||
946 | if (!isr && !dev->stats.tx_packets) | |
947 | { | |
948 | /* The 8390 probably hasn't gotten on the cable yet. */ | |
949 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ | |
950 | } | |
951 | ||
952 | /* Ugly but a reset can be slow, yet must be protected */ | |
953 | ||
954 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
955 | ||
956 | /* Try to restart the card. Perhaps the user has fixed something. */ | |
957 | ei_reset_8390(dev); | |
958 | AX88190_init(dev, 1); | |
959 | ||
960 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
961 | netif_wake_queue(dev); | |
962 | } | |
963 | ||
964 | /** | |
965 | * axnet_start_xmit - begin packet transmission | |
966 | * @skb: packet to be sent | |
967 | * @dev: network device to which packet is sent | |
968 | * | |
969 | * Sends a packet to an 8390 network device. | |
970 | */ | |
971 | ||
972 | static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, | |
973 | struct net_device *dev) | |
974 | { | |
975 | long e8390_base = dev->base_addr; | |
976 | struct ei_device *ei_local = netdev_priv(dev); | |
977 | int length, send_length, output_page; | |
978 | unsigned long flags; | |
979 | u8 packet[ETH_ZLEN]; | |
980 | ||
981 | netif_stop_queue(dev); | |
982 | ||
983 | length = skb->len; | |
984 | ||
985 | /* Mask interrupts from the ethercard. | |
986 | SMP: We have to grab the lock here otherwise the IRQ handler | |
987 | on another CPU can flip window and race the IRQ mask set. We end | |
988 | up trashing the mcast filter not disabling irqs if we don't lock */ | |
989 | ||
990 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
991 | outb_p(0x00, e8390_base + EN0_IMR); | |
992 | ||
993 | /* | |
994 | * Slow phase with lock held. | |
995 | */ | |
996 | ||
997 | ei_local->irqlock = 1; | |
998 | ||
999 | send_length = max(length, ETH_ZLEN); | |
1000 | ||
1001 | /* | |
1002 | * We have two Tx slots available for use. Find the first free | |
1003 | * slot, and then perform some sanity checks. With two Tx bufs, | |
1004 | * you get very close to transmitting back-to-back packets. With | |
1005 | * only one Tx buf, the transmitter sits idle while you reload the | |
1006 | * card, leaving a substantial gap between each transmitted packet. | |
1007 | */ | |
1008 | ||
1009 | if (ei_local->tx1 == 0) | |
1010 | { | |
1011 | output_page = ei_local->tx_start_page; | |
1012 | ei_local->tx1 = send_length; | |
1013 | if (ei_debug && ei_local->tx2 > 0) | |
1014 | netdev_printk(KERN_DEBUG, dev, | |
1015 | "idle transmitter tx2=%d, lasttx=%d, txing=%d\n", | |
1016 | ei_local->tx2, ei_local->lasttx, | |
1017 | ei_local->txing); | |
1018 | } | |
1019 | else if (ei_local->tx2 == 0) | |
1020 | { | |
1021 | output_page = ei_local->tx_start_page + TX_PAGES/2; | |
1022 | ei_local->tx2 = send_length; | |
1023 | if (ei_debug && ei_local->tx1 > 0) | |
1024 | netdev_printk(KERN_DEBUG, dev, | |
1025 | "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n", | |
1026 | ei_local->tx1, ei_local->lasttx, | |
1027 | ei_local->txing); | |
1028 | } | |
1029 | else | |
1030 | { /* We should never get here. */ | |
1031 | if (ei_debug) | |
1032 | netdev_printk(KERN_DEBUG, dev, | |
1033 | "No Tx buffers free! tx1=%d tx2=%d last=%d\n", | |
1034 | ei_local->tx1, ei_local->tx2, | |
1035 | ei_local->lasttx); | |
1036 | ei_local->irqlock = 0; | |
1037 | netif_stop_queue(dev); | |
1038 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1039 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1040 | dev->stats.tx_errors++; | |
1041 | return NETDEV_TX_BUSY; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Okay, now upload the packet and trigger a send if the transmitter | |
1046 | * isn't already sending. If it is busy, the interrupt handler will | |
1047 | * trigger the send later, upon receiving a Tx done interrupt. | |
1048 | */ | |
1049 | ||
1050 | if (length == skb->len) | |
1051 | ei_block_output(dev, length, skb->data, output_page); | |
1052 | else { | |
1053 | memset(packet, 0, ETH_ZLEN); | |
1054 | skb_copy_from_linear_data(skb, packet, skb->len); | |
1055 | ei_block_output(dev, length, packet, output_page); | |
1056 | } | |
1057 | ||
1058 | if (! ei_local->txing) | |
1059 | { | |
1060 | ei_local->txing = 1; | |
1061 | NS8390_trigger_send(dev, send_length, output_page); | |
1062 | dev->trans_start = jiffies; | |
1063 | if (output_page == ei_local->tx_start_page) | |
1064 | { | |
1065 | ei_local->tx1 = -1; | |
1066 | ei_local->lasttx = -1; | |
1067 | } | |
1068 | else | |
1069 | { | |
1070 | ei_local->tx2 = -1; | |
1071 | ei_local->lasttx = -2; | |
1072 | } | |
1073 | } | |
1074 | else ei_local->txqueue++; | |
1075 | ||
1076 | if (ei_local->tx1 && ei_local->tx2) | |
1077 | netif_stop_queue(dev); | |
1078 | else | |
1079 | netif_start_queue(dev); | |
1080 | ||
1081 | /* Turn 8390 interrupts back on. */ | |
1082 | ei_local->irqlock = 0; | |
1083 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1084 | ||
1085 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1086 | ||
1087 | dev_kfree_skb (skb); | |
1088 | dev->stats.tx_bytes += send_length; | |
1089 | ||
1090 | return NETDEV_TX_OK; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * ax_interrupt - handle the interrupts from an 8390 | |
1095 | * @irq: interrupt number | |
1096 | * @dev_id: a pointer to the net_device | |
1097 | * | |
1098 | * Handle the ether interface interrupts. We pull packets from | |
1099 | * the 8390 via the card specific functions and fire them at the networking | |
1100 | * stack. We also handle transmit completions and wake the transmit path if | |
1101 | * necessary. We also update the counters and do other housekeeping as | |
1102 | * needed. | |
1103 | */ | |
1104 | ||
1105 | static irqreturn_t ax_interrupt(int irq, void *dev_id) | |
1106 | { | |
1107 | struct net_device *dev = dev_id; | |
1108 | long e8390_base; | |
1109 | int interrupts, nr_serviced = 0, i; | |
1110 | struct ei_device *ei_local; | |
1111 | int handled = 0; | |
1112 | unsigned long flags; | |
1113 | ||
1114 | e8390_base = dev->base_addr; | |
1115 | ei_local = netdev_priv(dev); | |
1116 | ||
1117 | /* | |
1118 | * Protect the irq test too. | |
1119 | */ | |
1120 | ||
1121 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1122 | ||
1123 | if (ei_local->irqlock) { | |
1124 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ | |
1125 | const char *msg; | |
1126 | /* The "irqlock" check is only for testing. */ | |
1127 | if (ei_local->irqlock) | |
1128 | msg = "Interrupted while interrupts are masked!"; | |
1129 | else | |
1130 | msg = "Reentering the interrupt handler!"; | |
1131 | netdev_info(dev, "%s, isr=%#2x imr=%#2x\n", | |
1132 | msg, | |
1133 | inb_p(e8390_base + EN0_ISR), | |
1134 | inb_p(e8390_base + EN0_IMR)); | |
1135 | #endif | |
1136 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1137 | return IRQ_NONE; | |
1138 | } | |
1139 | ||
1140 | if (ei_debug > 3) | |
1141 | netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n", | |
1142 | inb_p(e8390_base + EN0_ISR)); | |
1143 | ||
1144 | outb_p(0x00, e8390_base + EN0_ISR); | |
1145 | ei_local->irqlock = 1; | |
1146 | ||
1147 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ | |
1148 | while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 && | |
1149 | ++nr_serviced < MAX_SERVICE) | |
1150 | { | |
1151 | if (!netif_running(dev) || (interrupts == 0xff)) { | |
1152 | if (ei_debug > 1) | |
1153 | netdev_warn(dev, | |
1154 | "interrupt from stopped card\n"); | |
1155 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1156 | interrupts = 0; | |
1157 | break; | |
1158 | } | |
1159 | handled = 1; | |
1160 | ||
1161 | /* AX88190 bug fix. */ | |
1162 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1163 | for (i = 0; i < 10; i++) { | |
1164 | if (!(inb(e8390_base + EN0_ISR) & interrupts)) | |
1165 | break; | |
1166 | outb_p(0, e8390_base + EN0_ISR); | |
1167 | outb_p(interrupts, e8390_base + EN0_ISR); | |
1168 | } | |
1169 | if (interrupts & ENISR_OVER) | |
1170 | ei_rx_overrun(dev); | |
1171 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) | |
1172 | { | |
1173 | /* Got a good (?) packet. */ | |
1174 | ei_receive(dev); | |
1175 | } | |
1176 | /* Push the next to-transmit packet through. */ | |
1177 | if (interrupts & ENISR_TX) | |
1178 | ei_tx_intr(dev); | |
1179 | else if (interrupts & ENISR_TX_ERR) | |
1180 | ei_tx_err(dev); | |
1181 | ||
1182 | if (interrupts & ENISR_COUNTERS) | |
1183 | { | |
1184 | dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); | |
1185 | dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); | |
1186 | dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | if (interrupts && ei_debug > 3) | |
1191 | { | |
1192 | handled = 1; | |
1193 | if (nr_serviced >= MAX_SERVICE) | |
1194 | { | |
1195 | /* 0xFF is valid for a card removal */ | |
1196 | if(interrupts!=0xFF) | |
1197 | netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n", | |
1198 | interrupts); | |
1199 | outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ | |
1200 | } else { | |
1201 | netdev_warn(dev, "unknown interrupt %#2x\n", | |
1202 | interrupts); | |
1203 | outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | /* Turn 8390 interrupts back on. */ | |
1208 | ei_local->irqlock = 0; | |
1209 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1210 | ||
1211 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1212 | return IRQ_RETVAL(handled); | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * ei_tx_err - handle transmitter error | |
1217 | * @dev: network device which threw the exception | |
1218 | * | |
1219 | * A transmitter error has happened. Most likely excess collisions (which | |
1220 | * is a fairly normal condition). If the error is one where the Tx will | |
1221 | * have been aborted, we try and send another one right away, instead of | |
1222 | * letting the failed packet sit and collect dust in the Tx buffer. This | |
1223 | * is a much better solution as it avoids kernel based Tx timeouts, and | |
1224 | * an unnecessary card reset. | |
1225 | * | |
1226 | * Called with lock held. | |
1227 | */ | |
1228 | ||
1229 | static void ei_tx_err(struct net_device *dev) | |
1230 | { | |
1231 | long e8390_base = dev->base_addr; | |
1232 | unsigned char txsr = inb_p(e8390_base+EN0_TSR); | |
1233 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); | |
1234 | ||
1235 | #ifdef VERBOSE_ERROR_DUMP | |
1236 | netdev_printk(KERN_DEBUG, dev, | |
1237 | "transmitter error (%#2x):", txsr); | |
1238 | if (txsr & ENTSR_ABT) | |
1239 | pr_cont(" excess-collisions"); | |
1240 | if (txsr & ENTSR_ND) | |
1241 | pr_cont(" non-deferral"); | |
1242 | if (txsr & ENTSR_CRS) | |
1243 | pr_cont(" lost-carrier"); | |
1244 | if (txsr & ENTSR_FU) | |
1245 | pr_cont(" FIFO-underrun"); | |
1246 | if (txsr & ENTSR_CDH) | |
1247 | pr_cont(" lost-heartbeat"); | |
1248 | pr_cont("\n"); | |
1249 | #endif | |
1250 | ||
1251 | if (tx_was_aborted) | |
1252 | ei_tx_intr(dev); | |
1253 | else | |
1254 | { | |
1255 | dev->stats.tx_errors++; | |
1256 | if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; | |
1257 | if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; | |
1258 | if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /** | |
1263 | * ei_tx_intr - transmit interrupt handler | |
1264 | * @dev: network device for which tx intr is handled | |
1265 | * | |
1266 | * We have finished a transmit: check for errors and then trigger the next | |
1267 | * packet to be sent. Called with lock held. | |
1268 | */ | |
1269 | ||
1270 | static void ei_tx_intr(struct net_device *dev) | |
1271 | { | |
1272 | long e8390_base = dev->base_addr; | |
1273 | struct ei_device *ei_local = netdev_priv(dev); | |
1274 | int status = inb(e8390_base + EN0_TSR); | |
1275 | ||
1276 | /* | |
1277 | * There are two Tx buffers, see which one finished, and trigger | |
1278 | * the send of another one if it exists. | |
1279 | */ | |
1280 | ei_local->txqueue--; | |
1281 | ||
1282 | if (ei_local->tx1 < 0) | |
1283 | { | |
1284 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) | |
1285 | netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n", | |
1286 | ei_local->name, ei_local->lasttx, | |
1287 | ei_local->tx1); | |
1288 | ei_local->tx1 = 0; | |
1289 | if (ei_local->tx2 > 0) | |
1290 | { | |
1291 | ei_local->txing = 1; | |
1292 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); | |
1293 | dev->trans_start = jiffies; | |
1294 | ei_local->tx2 = -1, | |
1295 | ei_local->lasttx = 2; | |
1296 | } | |
1297 | else ei_local->lasttx = 20, ei_local->txing = 0; | |
1298 | } | |
1299 | else if (ei_local->tx2 < 0) | |
1300 | { | |
1301 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) | |
1302 | netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n", | |
1303 | ei_local->name, ei_local->lasttx, | |
1304 | ei_local->tx2); | |
1305 | ei_local->tx2 = 0; | |
1306 | if (ei_local->tx1 > 0) | |
1307 | { | |
1308 | ei_local->txing = 1; | |
1309 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); | |
1310 | dev->trans_start = jiffies; | |
1311 | ei_local->tx1 = -1; | |
1312 | ei_local->lasttx = 1; | |
1313 | } | |
1314 | else | |
1315 | ei_local->lasttx = 10, ei_local->txing = 0; | |
1316 | } | |
1317 | // else | |
1318 | // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n", | |
1319 | // ei_local->lasttx); | |
1320 | ||
1321 | /* Minimize Tx latency: update the statistics after we restart TXing. */ | |
1322 | if (status & ENTSR_COL) | |
1323 | dev->stats.collisions++; | |
1324 | if (status & ENTSR_PTX) | |
1325 | dev->stats.tx_packets++; | |
1326 | else | |
1327 | { | |
1328 | dev->stats.tx_errors++; | |
1329 | if (status & ENTSR_ABT) | |
1330 | { | |
1331 | dev->stats.tx_aborted_errors++; | |
1332 | dev->stats.collisions += 16; | |
1333 | } | |
1334 | if (status & ENTSR_CRS) | |
1335 | dev->stats.tx_carrier_errors++; | |
1336 | if (status & ENTSR_FU) | |
1337 | dev->stats.tx_fifo_errors++; | |
1338 | if (status & ENTSR_CDH) | |
1339 | dev->stats.tx_heartbeat_errors++; | |
1340 | if (status & ENTSR_OWC) | |
1341 | dev->stats.tx_window_errors++; | |
1342 | } | |
1343 | netif_wake_queue(dev); | |
1344 | } | |
1345 | ||
1346 | /** | |
1347 | * ei_receive - receive some packets | |
1348 | * @dev: network device with which receive will be run | |
1349 | * | |
1350 | * We have a good packet(s), get it/them out of the buffers. | |
1351 | * Called with lock held. | |
1352 | */ | |
1353 | ||
1354 | static void ei_receive(struct net_device *dev) | |
1355 | { | |
1356 | long e8390_base = dev->base_addr; | |
1357 | struct ei_device *ei_local = netdev_priv(dev); | |
1358 | unsigned char rxing_page, this_frame, next_frame; | |
1359 | unsigned short current_offset; | |
1360 | int rx_pkt_count = 0; | |
1361 | struct e8390_pkt_hdr rx_frame; | |
1362 | ||
1363 | while (++rx_pkt_count < 10) | |
1364 | { | |
1365 | int pkt_len, pkt_stat; | |
1366 | ||
1367 | /* Get the rx page (incoming packet pointer). */ | |
1368 | rxing_page = inb_p(e8390_base + EN1_CURPAG -1); | |
1369 | ||
1370 | /* Remove one frame from the ring. Boundary is always a page behind. */ | |
1371 | this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; | |
1372 | if (this_frame >= ei_local->stop_page) | |
1373 | this_frame = ei_local->rx_start_page; | |
1374 | ||
1375 | /* Someday we'll omit the previous, iff we never get this message. | |
1376 | (There is at least one clone claimed to have a problem.) | |
1377 | ||
1378 | Keep quiet if it looks like a card removal. One problem here | |
1379 | is that some clones crash in roughly the same way. | |
1380 | */ | |
1381 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) | |
1382 | netdev_err(dev, "mismatched read page pointers %2x vs %2x\n", | |
1383 | this_frame, ei_local->current_page); | |
1384 | ||
1385 | if (this_frame == rxing_page) /* Read all the frames? */ | |
1386 | break; /* Done for now */ | |
1387 | ||
1388 | current_offset = this_frame << 8; | |
1389 | ei_get_8390_hdr(dev, &rx_frame, this_frame); | |
1390 | ||
1391 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); | |
1392 | pkt_stat = rx_frame.status; | |
1393 | ||
1394 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); | |
1395 | ||
1396 | if (pkt_len < 60 || pkt_len > 1518) | |
1397 | { | |
1398 | if (ei_debug) | |
1399 | netdev_printk(KERN_DEBUG, dev, | |
1400 | "bogus packet size: %d, status=%#2x nxpg=%#2x\n", | |
1401 | rx_frame.count, rx_frame.status, | |
1402 | rx_frame.next); | |
1403 | dev->stats.rx_errors++; | |
1404 | dev->stats.rx_length_errors++; | |
1405 | } | |
1406 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) | |
1407 | { | |
1408 | struct sk_buff *skb; | |
1409 | ||
1410 | skb = dev_alloc_skb(pkt_len+2); | |
1411 | if (skb == NULL) | |
1412 | { | |
1413 | if (ei_debug > 1) | |
1414 | netdev_printk(KERN_DEBUG, dev, | |
1415 | "Couldn't allocate a sk_buff of size %d\n", | |
1416 | pkt_len); | |
1417 | dev->stats.rx_dropped++; | |
1418 | break; | |
1419 | } | |
1420 | else | |
1421 | { | |
1422 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ | |
1423 | skb_put(skb, pkt_len); /* Make room */ | |
1424 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); | |
1425 | skb->protocol=eth_type_trans(skb,dev); | |
1426 | netif_rx(skb); | |
1427 | dev->stats.rx_packets++; | |
1428 | dev->stats.rx_bytes += pkt_len; | |
1429 | if (pkt_stat & ENRSR_PHY) | |
1430 | dev->stats.multicast++; | |
1431 | } | |
1432 | } | |
1433 | else | |
1434 | { | |
1435 | if (ei_debug) | |
1436 | netdev_printk(KERN_DEBUG, dev, | |
1437 | "bogus packet: status=%#2x nxpg=%#2x size=%d\n", | |
1438 | rx_frame.status, rx_frame.next, | |
1439 | rx_frame.count); | |
1440 | dev->stats.rx_errors++; | |
1441 | /* NB: The NIC counts CRC, frame and missed errors. */ | |
1442 | if (pkt_stat & ENRSR_FO) | |
1443 | dev->stats.rx_fifo_errors++; | |
1444 | } | |
1445 | next_frame = rx_frame.next; | |
1446 | ||
1447 | /* This _should_ never happen: it's here for avoiding bad clones. */ | |
1448 | if (next_frame >= ei_local->stop_page) { | |
1449 | netdev_info(dev, "next frame inconsistency, %#2x\n", | |
1450 | next_frame); | |
1451 | next_frame = ei_local->rx_start_page; | |
1452 | } | |
1453 | ei_local->current_page = next_frame; | |
1454 | outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /** | |
1459 | * ei_rx_overrun - handle receiver overrun | |
1460 | * @dev: network device which threw exception | |
1461 | * | |
1462 | * We have a receiver overrun: we have to kick the 8390 to get it started | |
1463 | * again. Problem is that you have to kick it exactly as NS prescribes in | |
1464 | * the updated datasheets, or "the NIC may act in an unpredictable manner." | |
1465 | * This includes causing "the NIC to defer indefinitely when it is stopped | |
1466 | * on a busy network." Ugh. | |
1467 | * Called with lock held. Don't call this with the interrupts off or your | |
1468 | * computer will hate you - it takes 10ms or so. | |
1469 | */ | |
1470 | ||
1471 | static void ei_rx_overrun(struct net_device *dev) | |
1472 | { | |
1473 | axnet_dev_t *info = PRIV(dev); | |
1474 | long e8390_base = dev->base_addr; | |
1475 | unsigned char was_txing, must_resend = 0; | |
1476 | ||
1477 | /* | |
1478 | * Record whether a Tx was in progress and then issue the | |
1479 | * stop command. | |
1480 | */ | |
1481 | was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; | |
1482 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1483 | ||
1484 | if (ei_debug > 1) | |
1485 | netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n"); | |
1486 | dev->stats.rx_over_errors++; | |
1487 | ||
1488 | /* | |
1489 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. | |
1490 | * Early datasheets said to poll the reset bit, but now they say that | |
1491 | * it "is not a reliable indicator and subsequently should be ignored." | |
1492 | * We wait at least 10ms. | |
1493 | */ | |
1494 | ||
1495 | mdelay(10); | |
1496 | ||
1497 | /* | |
1498 | * Reset RBCR[01] back to zero as per magic incantation. | |
1499 | */ | |
1500 | outb_p(0x00, e8390_base+EN0_RCNTLO); | |
1501 | outb_p(0x00, e8390_base+EN0_RCNTHI); | |
1502 | ||
1503 | /* | |
1504 | * See if any Tx was interrupted or not. According to NS, this | |
1505 | * step is vital, and skipping it will cause no end of havoc. | |
1506 | */ | |
1507 | ||
1508 | if (was_txing) | |
1509 | { | |
1510 | unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); | |
1511 | if (!tx_completed) | |
1512 | must_resend = 1; | |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * Have to enter loopback mode and then restart the NIC before | |
1517 | * you are allowed to slurp packets up off the ring. | |
1518 | */ | |
1519 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); | |
1520 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); | |
1521 | ||
1522 | /* | |
1523 | * Clear the Rx ring of all the debris, and ack the interrupt. | |
1524 | */ | |
1525 | ei_receive(dev); | |
1526 | ||
1527 | /* | |
1528 | * Leave loopback mode, and resend any packet that got stopped. | |
1529 | */ | |
1530 | outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); | |
1531 | if (must_resend) | |
1532 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Collect the stats. This is called unlocked and from several contexts. | |
1537 | */ | |
1538 | ||
1539 | static struct net_device_stats *get_stats(struct net_device *dev) | |
1540 | { | |
1541 | long ioaddr = dev->base_addr; | |
1542 | struct ei_device *ei_local = netdev_priv(dev); | |
1543 | unsigned long flags; | |
1544 | ||
1545 | /* If the card is stopped, just return the present stats. */ | |
1546 | if (!netif_running(dev)) | |
1547 | return &dev->stats; | |
1548 | ||
1549 | spin_lock_irqsave(&ei_local->page_lock,flags); | |
1550 | /* Read the counter registers, assuming we are in page 0. */ | |
1551 | dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); | |
1552 | dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); | |
1553 | dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); | |
1554 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1555 | ||
1556 | return &dev->stats; | |
1557 | } | |
1558 | ||
1559 | /* | |
1560 | * Form the 64 bit 8390 multicast table from the linked list of addresses | |
1561 | * associated with this dev structure. | |
1562 | */ | |
1563 | ||
1564 | static inline void make_mc_bits(u8 *bits, struct net_device *dev) | |
1565 | { | |
1566 | struct netdev_hw_addr *ha; | |
1567 | u32 crc; | |
1568 | ||
1569 | netdev_for_each_mc_addr(ha, dev) { | |
1570 | crc = ether_crc(ETH_ALEN, ha->addr); | |
1571 | /* | |
1572 | * The 8390 uses the 6 most significant bits of the | |
1573 | * CRC to index the multicast table. | |
1574 | */ | |
1575 | bits[crc>>29] |= (1<<((crc>>26)&7)); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | /** | |
1580 | * do_set_multicast_list - set/clear multicast filter | |
1581 | * @dev: net device for which multicast filter is adjusted | |
1582 | * | |
1583 | * Set or clear the multicast filter for this adaptor. | |
1584 | * Must be called with lock held. | |
1585 | */ | |
1586 | ||
1587 | static void do_set_multicast_list(struct net_device *dev) | |
1588 | { | |
1589 | long e8390_base = dev->base_addr; | |
1590 | int i; | |
1591 | struct ei_device *ei_local = netdev_priv(dev); | |
1592 | ||
1593 | if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) { | |
1594 | memset(ei_local->mcfilter, 0, 8); | |
1595 | if (!netdev_mc_empty(dev)) | |
1596 | make_mc_bits(ei_local->mcfilter, dev); | |
1597 | } else { | |
1598 | /* set to accept-all */ | |
1599 | memset(ei_local->mcfilter, 0xFF, 8); | |
1600 | } | |
1601 | ||
1602 | outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); | |
1603 | for(i = 0; i < 8; i++) | |
1604 | { | |
1605 | outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); | |
1606 | } | |
1607 | outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); | |
1608 | ||
1609 | if(dev->flags&IFF_PROMISC) | |
1610 | outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); | |
1611 | else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) | |
1612 | outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); | |
1613 | else | |
1614 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); | |
1615 | ||
1616 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1617 | } | |
1618 | ||
1619 | /* | |
1620 | * Called without lock held. This is invoked from user context and may | |
1621 | * be parallel to just about everything else. Its also fairly quick and | |
1622 | * not called too often. Must protect against both bh and irq users | |
1623 | */ | |
1624 | ||
1625 | static void set_multicast_list(struct net_device *dev) | |
1626 | { | |
1627 | unsigned long flags; | |
1628 | ||
1629 | spin_lock_irqsave(&dev_lock(dev), flags); | |
1630 | do_set_multicast_list(dev); | |
1631 | spin_unlock_irqrestore(&dev_lock(dev), flags); | |
1632 | } | |
1633 | ||
1634 | /* This page of functions should be 8390 generic */ | |
1635 | /* Follow National Semi's recommendations for initializing the "NIC". */ | |
1636 | ||
1637 | /** | |
1638 | * AX88190_init - initialize 8390 hardware | |
1639 | * @dev: network device to initialize | |
1640 | * @startp: boolean. non-zero value to initiate chip processing | |
1641 | * | |
1642 | * Must be called with lock held. | |
1643 | */ | |
1644 | ||
1645 | static void AX88190_init(struct net_device *dev, int startp) | |
1646 | { | |
1647 | axnet_dev_t *info = PRIV(dev); | |
1648 | long e8390_base = dev->base_addr; | |
1649 | struct ei_device *ei_local = netdev_priv(dev); | |
1650 | int i; | |
1651 | int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; | |
1652 | ||
1653 | if(sizeof(struct e8390_pkt_hdr)!=4) | |
1654 | panic("8390.c: header struct mispacked\n"); | |
1655 | /* Follow National Semi's recommendations for initing the DP83902. */ | |
1656 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ | |
1657 | outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ | |
1658 | /* Clear the remote byte count registers. */ | |
1659 | outb_p(0x00, e8390_base + EN0_RCNTLO); | |
1660 | outb_p(0x00, e8390_base + EN0_RCNTHI); | |
1661 | /* Set to monitor and loopback mode -- this is vital!. */ | |
1662 | outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ | |
1663 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ | |
1664 | /* Set the transmit page and receive ring. */ | |
1665 | outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); | |
1666 | ei_local->tx1 = ei_local->tx2 = 0; | |
1667 | outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); | |
1668 | outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ | |
1669 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ | |
1670 | outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); | |
1671 | /* Clear the pending interrupts and mask. */ | |
1672 | outb_p(0xFF, e8390_base + EN0_ISR); | |
1673 | outb_p(0x00, e8390_base + EN0_IMR); | |
1674 | ||
1675 | /* Copy the station address into the DS8390 registers. */ | |
1676 | ||
1677 | outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ | |
1678 | for(i = 0; i < 6; i++) | |
1679 | { | |
1680 | outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); | |
1681 | if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) | |
1682 | netdev_err(dev, "Hw. address read/write mismap %d\n", i); | |
1683 | } | |
1684 | ||
1685 | outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); | |
1686 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1687 | ||
1688 | netif_start_queue(dev); | |
1689 | ei_local->tx1 = ei_local->tx2 = 0; | |
1690 | ei_local->txing = 0; | |
1691 | ||
1692 | if (info->flags & IS_AX88790) /* select Internal PHY */ | |
1693 | outb(0x10, e8390_base + AXNET_GPIO); | |
1694 | ||
1695 | if (startp) | |
1696 | { | |
1697 | outb_p(0xff, e8390_base + EN0_ISR); | |
1698 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1699 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1700 | outb_p(E8390_TXCONFIG | info->duplex_flag, | |
1701 | e8390_base + EN0_TXCR); /* xmit on. */ | |
1702 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ | |
1703 | outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ | |
1704 | do_set_multicast_list(dev); /* (re)load the mcast table */ | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | /* Trigger a transmit start, assuming the length is valid. | |
1709 | Always called with the page lock held */ | |
1710 | ||
1711 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1712 | int start_page) | |
1713 | { | |
1714 | long e8390_base = dev->base_addr; | |
1715 | struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev); | |
1716 | ||
1717 | if (inb_p(e8390_base) & E8390_TRANS) | |
1718 | { | |
1719 | netdev_warn(dev, "trigger_send() called with the transmitter busy\n"); | |
1720 | return; | |
1721 | } | |
1722 | outb_p(length & 0xff, e8390_base + EN0_TCNTLO); | |
1723 | outb_p(length >> 8, e8390_base + EN0_TCNTHI); | |
1724 | outb_p(start_page, e8390_base + EN0_TPSR); | |
1725 | outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); | |
1726 | } |