Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f3b197ac | 2 | * xircom_cb: A driver for the (tulip-like) Xircom Cardbus ethernet cards |
1da177e4 LT |
3 | * |
4 | * This software is (C) by the respective authors, and licensed under the GPL | |
5 | * License. | |
6 | * | |
7 | * Written by Arjan van de Ven for Red Hat, Inc. | |
f3b197ac | 8 | * Based on work by Jeff Garzik, Doug Ledford and Donald Becker |
1da177e4 LT |
9 | * |
10 | * This software may be used and distributed according to the terms | |
11 | * of the GNU General Public License, incorporated herein by reference. | |
12 | * | |
13 | * | |
14 | * $Id: xircom_cb.c,v 1.33 2001/03/19 14:02:07 arjanv Exp $ | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/bitops.h> | |
32 | ||
33 | #include <asm/uaccess.h> | |
34 | #include <asm/io.h> | |
82729971 AV |
35 | #ifdef CONFIG_NET_POLL_CONTROLLER |
36 | #include <asm/irq.h> | |
37 | #endif | |
1da177e4 LT |
38 | |
39 | #ifdef DEBUG | |
40 | #define enter(x) printk("Enter: %s, %s line %i\n",x,__FILE__,__LINE__) | |
41 | #define leave(x) printk("Leave: %s, %s line %i\n",x,__FILE__,__LINE__) | |
42 | #else | |
43 | #define enter(x) do {} while (0) | |
44 | #define leave(x) do {} while (0) | |
45 | #endif | |
46 | ||
47 | ||
48 | MODULE_DESCRIPTION("Xircom Cardbus ethernet driver"); | |
49 | MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | ||
53 | ||
54 | /* IO registers on the card, offsets */ | |
55 | #define CSR0 0x00 | |
56 | #define CSR1 0x08 | |
57 | #define CSR2 0x10 | |
58 | #define CSR3 0x18 | |
59 | #define CSR4 0x20 | |
60 | #define CSR5 0x28 | |
61 | #define CSR6 0x30 | |
62 | #define CSR7 0x38 | |
63 | #define CSR8 0x40 | |
64 | #define CSR9 0x48 | |
65 | #define CSR10 0x50 | |
66 | #define CSR11 0x58 | |
67 | #define CSR12 0x60 | |
68 | #define CSR13 0x68 | |
69 | #define CSR14 0x70 | |
70 | #define CSR15 0x78 | |
71 | #define CSR16 0x80 | |
72 | ||
73 | /* PCI registers */ | |
74 | #define PCI_POWERMGMT 0x40 | |
75 | ||
76 | /* Offsets of the buffers within the descriptor pages, in bytes */ | |
77 | ||
78 | #define NUMDESCRIPTORS 4 | |
79 | ||
80 | static int bufferoffsets[NUMDESCRIPTORS] = {128,2048,4096,6144}; | |
81 | ||
82 | ||
83 | struct xircom_private { | |
84 | /* Send and receive buffers, kernel-addressable and dma addressable forms */ | |
85 | ||
86 | unsigned int *rx_buffer; | |
87 | unsigned int *tx_buffer; | |
88 | ||
89 | dma_addr_t rx_dma_handle; | |
90 | dma_addr_t tx_dma_handle; | |
91 | ||
92 | struct sk_buff *tx_skb[4]; | |
93 | ||
94 | unsigned long io_port; | |
95 | int open; | |
f3b197ac | 96 | |
1da177e4 LT |
97 | /* transmit_used is the rotating counter that indicates which transmit |
98 | descriptor has to be used next */ | |
99 | int transmit_used; | |
100 | ||
101 | /* Spinlock to serialize register operations. | |
102 | It must be helt while manipulating the following registers: | |
103 | CSR0, CSR6, CSR7, CSR9, CSR10, CSR15 | |
104 | */ | |
105 | spinlock_t lock; | |
106 | ||
107 | ||
108 | struct pci_dev *pdev; | |
109 | struct net_device *dev; | |
110 | struct net_device_stats stats; | |
111 | }; | |
112 | ||
113 | ||
114 | /* Function prototypes */ | |
115 | static int xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id); | |
116 | static void xircom_remove(struct pci_dev *pdev); | |
7d12e780 | 117 | static irqreturn_t xircom_interrupt(int irq, void *dev_instance); |
1da177e4 LT |
118 | static int xircom_start_xmit(struct sk_buff *skb, struct net_device *dev); |
119 | static int xircom_open(struct net_device *dev); | |
120 | static int xircom_close(struct net_device *dev); | |
121 | static void xircom_up(struct xircom_private *card); | |
122 | static struct net_device_stats *xircom_get_stats(struct net_device *dev); | |
3be034b6 | 123 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1da177e4 LT |
124 | static void xircom_poll_controller(struct net_device *dev); |
125 | #endif | |
126 | ||
127 | static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset); | |
128 | static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset); | |
129 | static void read_mac_address(struct xircom_private *card); | |
130 | static void transceiver_voodoo(struct xircom_private *card); | |
131 | static void initialize_card(struct xircom_private *card); | |
132 | static void trigger_transmit(struct xircom_private *card); | |
133 | static void trigger_receive(struct xircom_private *card); | |
134 | static void setup_descriptors(struct xircom_private *card); | |
135 | static void remove_descriptors(struct xircom_private *card); | |
136 | static int link_status_changed(struct xircom_private *card); | |
137 | static void activate_receiver(struct xircom_private *card); | |
138 | static void deactivate_receiver(struct xircom_private *card); | |
139 | static void activate_transmitter(struct xircom_private *card); | |
140 | static void deactivate_transmitter(struct xircom_private *card); | |
141 | static void enable_transmit_interrupt(struct xircom_private *card); | |
142 | static void enable_receive_interrupt(struct xircom_private *card); | |
143 | static void enable_link_interrupt(struct xircom_private *card); | |
144 | static void disable_all_interrupts(struct xircom_private *card); | |
145 | static int link_status(struct xircom_private *card); | |
146 | ||
147 | ||
148 | ||
149 | static struct pci_device_id xircom_pci_table[] = { | |
150 | {0x115D, 0x0003, PCI_ANY_ID, PCI_ANY_ID,}, | |
151 | {0,}, | |
152 | }; | |
153 | MODULE_DEVICE_TABLE(pci, xircom_pci_table); | |
154 | ||
155 | static struct pci_driver xircom_ops = { | |
f3b197ac JG |
156 | .name = "xircom_cb", |
157 | .id_table = xircom_pci_table, | |
158 | .probe = xircom_probe, | |
159 | .remove = xircom_remove, | |
1da177e4 LT |
160 | .suspend =NULL, |
161 | .resume =NULL | |
162 | }; | |
163 | ||
164 | ||
165 | #ifdef DEBUG | |
166 | static void print_binary(unsigned int number) | |
167 | { | |
168 | int i,i2; | |
169 | char buffer[64]; | |
170 | memset(buffer,0,64); | |
171 | i2=0; | |
172 | for (i=31;i>=0;i--) { | |
173 | if (number & (1<<i)) | |
174 | buffer[i2++]='1'; | |
175 | else | |
176 | buffer[i2++]='0'; | |
f3b197ac | 177 | if ((i&3)==0) |
1da177e4 LT |
178 | buffer[i2++]=' '; |
179 | } | |
180 | printk("%s\n",buffer); | |
181 | } | |
182 | #endif | |
183 | ||
184 | static void netdev_get_drvinfo(struct net_device *dev, | |
185 | struct ethtool_drvinfo *info) | |
186 | { | |
187 | struct xircom_private *private = netdev_priv(dev); | |
188 | ||
189 | strcpy(info->driver, "xircom_cb"); | |
190 | strcpy(info->bus_info, pci_name(private->pdev)); | |
191 | } | |
192 | ||
7282d491 | 193 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
194 | .get_drvinfo = netdev_get_drvinfo, |
195 | }; | |
196 | ||
197 | /* xircom_probe is the code that gets called on device insertion. | |
198 | it sets up the hardware and registers the device to the networklayer. | |
f3b197ac | 199 | |
1da177e4 LT |
200 | TODO: Send 1 or 2 "dummy" packets here as the card seems to discard the |
201 | first two packets that get send, and pump hates that. | |
f3b197ac | 202 | |
1da177e4 LT |
203 | */ |
204 | static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
205 | { | |
206 | struct net_device *dev = NULL; | |
207 | struct xircom_private *private; | |
208 | unsigned char chip_rev; | |
209 | unsigned long flags; | |
210 | unsigned short tmp16; | |
211 | enter("xircom_probe"); | |
f3b197ac | 212 | |
1da177e4 LT |
213 | /* First do the PCI initialisation */ |
214 | ||
215 | if (pci_enable_device(pdev)) | |
216 | return -ENODEV; | |
217 | ||
218 | /* disable all powermanagement */ | |
219 | pci_write_config_dword(pdev, PCI_POWERMGMT, 0x0000); | |
f3b197ac | 220 | |
1da177e4 LT |
221 | pci_set_master(pdev); /* Why isn't this done by pci_enable_device ?*/ |
222 | ||
f3b197ac JG |
223 | /* clear PCI status, if any */ |
224 | pci_read_config_word (pdev,PCI_STATUS, &tmp16); | |
1da177e4 | 225 | pci_write_config_word (pdev, PCI_STATUS,tmp16); |
f3b197ac | 226 | |
1da177e4 | 227 | pci_read_config_byte(pdev, PCI_REVISION_ID, &chip_rev); |
f3b197ac | 228 | |
1da177e4 LT |
229 | if (!request_region(pci_resource_start(pdev, 0), 128, "xircom_cb")) { |
230 | printk(KERN_ERR "xircom_probe: failed to allocate io-region\n"); | |
231 | return -ENODEV; | |
232 | } | |
233 | ||
f3b197ac | 234 | /* |
1da177e4 LT |
235 | Before changing the hardware, allocate the memory. |
236 | This way, we can fail gracefully if not enough memory | |
f3b197ac | 237 | is available. |
1da177e4 LT |
238 | */ |
239 | dev = alloc_etherdev(sizeof(struct xircom_private)); | |
240 | if (!dev) { | |
241 | printk(KERN_ERR "xircom_probe: failed to allocate etherdev\n"); | |
242 | goto device_fail; | |
243 | } | |
244 | private = netdev_priv(dev); | |
f3b197ac | 245 | |
1da177e4 LT |
246 | /* Allocate the send/receive buffers */ |
247 | private->rx_buffer = pci_alloc_consistent(pdev,8192,&private->rx_dma_handle); | |
248 | if (private->rx_buffer == NULL) { | |
249 | printk(KERN_ERR "xircom_probe: no memory for rx buffer \n"); | |
250 | goto rx_buf_fail; | |
f3b197ac | 251 | } |
1da177e4 LT |
252 | private->tx_buffer = pci_alloc_consistent(pdev,8192,&private->tx_dma_handle); |
253 | if (private->tx_buffer == NULL) { | |
254 | printk(KERN_ERR "xircom_probe: no memory for tx buffer \n"); | |
255 | goto tx_buf_fail; | |
256 | } | |
257 | ||
258 | SET_MODULE_OWNER(dev); | |
259 | SET_NETDEV_DEV(dev, &pdev->dev); | |
260 | ||
261 | ||
262 | private->dev = dev; | |
263 | private->pdev = pdev; | |
264 | private->io_port = pci_resource_start(pdev, 0); | |
265 | spin_lock_init(&private->lock); | |
266 | dev->irq = pdev->irq; | |
267 | dev->base_addr = private->io_port; | |
f3b197ac | 268 | |
1da177e4 LT |
269 | initialize_card(private); |
270 | read_mac_address(private); | |
271 | setup_descriptors(private); | |
f3b197ac | 272 | |
1da177e4 LT |
273 | dev->open = &xircom_open; |
274 | dev->hard_start_xmit = &xircom_start_xmit; | |
275 | dev->stop = &xircom_close; | |
276 | dev->get_stats = &xircom_get_stats; | |
277 | dev->priv = private; | |
278 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
279 | dev->poll_controller = &xircom_poll_controller; | |
280 | #endif | |
281 | SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); | |
282 | pci_set_drvdata(pdev, dev); | |
283 | ||
284 | if (register_netdev(dev)) { | |
285 | printk(KERN_ERR "xircom_probe: netdevice registration failed.\n"); | |
286 | goto reg_fail; | |
287 | } | |
f3b197ac | 288 | |
1da177e4 LT |
289 | printk(KERN_INFO "%s: Xircom cardbus revision %i at irq %i \n", dev->name, chip_rev, pdev->irq); |
290 | /* start the transmitter to get a heartbeat */ | |
291 | /* TODO: send 2 dummy packets here */ | |
292 | transceiver_voodoo(private); | |
f3b197ac | 293 | |
1da177e4 LT |
294 | spin_lock_irqsave(&private->lock,flags); |
295 | activate_transmitter(private); | |
296 | activate_receiver(private); | |
297 | spin_unlock_irqrestore(&private->lock,flags); | |
f3b197ac | 298 | |
1da177e4 | 299 | trigger_receive(private); |
f3b197ac | 300 | |
1da177e4 LT |
301 | leave("xircom_probe"); |
302 | return 0; | |
303 | ||
304 | reg_fail: | |
305 | kfree(private->tx_buffer); | |
306 | tx_buf_fail: | |
307 | kfree(private->rx_buffer); | |
308 | rx_buf_fail: | |
309 | free_netdev(dev); | |
310 | device_fail: | |
311 | return -ENODEV; | |
312 | } | |
313 | ||
314 | ||
315 | /* | |
316 | xircom_remove is called on module-unload or on device-eject. | |
317 | it unregisters the irq, io-region and network device. | |
318 | Interrupts and such are already stopped in the "ifconfig ethX down" | |
319 | code. | |
320 | */ | |
321 | static void __devexit xircom_remove(struct pci_dev *pdev) | |
322 | { | |
323 | struct net_device *dev = pci_get_drvdata(pdev); | |
324 | struct xircom_private *card = netdev_priv(dev); | |
325 | ||
326 | enter("xircom_remove"); | |
327 | pci_free_consistent(pdev,8192,card->rx_buffer,card->rx_dma_handle); | |
328 | pci_free_consistent(pdev,8192,card->tx_buffer,card->tx_dma_handle); | |
329 | ||
330 | release_region(dev->base_addr, 128); | |
331 | unregister_netdev(dev); | |
332 | free_netdev(dev); | |
333 | pci_set_drvdata(pdev, NULL); | |
334 | leave("xircom_remove"); | |
f3b197ac | 335 | } |
1da177e4 | 336 | |
7d12e780 | 337 | static irqreturn_t xircom_interrupt(int irq, void *dev_instance) |
1da177e4 LT |
338 | { |
339 | struct net_device *dev = (struct net_device *) dev_instance; | |
340 | struct xircom_private *card = netdev_priv(dev); | |
341 | unsigned int status; | |
342 | int i; | |
343 | ||
344 | enter("xircom_interrupt\n"); | |
345 | ||
346 | spin_lock(&card->lock); | |
347 | status = inl(card->io_port+CSR5); | |
348 | ||
f3b197ac | 349 | #ifdef DEBUG |
1da177e4 LT |
350 | print_binary(status); |
351 | printk("tx status 0x%08x 0x%08x \n",card->tx_buffer[0],card->tx_buffer[4]); | |
352 | printk("rx status 0x%08x 0x%08x \n",card->rx_buffer[0],card->rx_buffer[4]); | |
f3b197ac | 353 | #endif |
1da177e4 LT |
354 | /* Handle shared irq and hotplug */ |
355 | if (status == 0 || status == 0xffffffff) { | |
356 | spin_unlock(&card->lock); | |
357 | return IRQ_NONE; | |
358 | } | |
359 | ||
360 | if (link_status_changed(card)) { | |
361 | int newlink; | |
362 | printk(KERN_DEBUG "xircom_cb: Link status has changed \n"); | |
363 | newlink = link_status(card); | |
364 | printk(KERN_INFO "xircom_cb: Link is %i mbit \n",newlink); | |
365 | if (newlink) | |
366 | netif_carrier_on(dev); | |
367 | else | |
368 | netif_carrier_off(dev); | |
f3b197ac | 369 | |
1da177e4 LT |
370 | } |
371 | ||
f3b197ac | 372 | /* Clear all remaining interrupts */ |
1da177e4 LT |
373 | status |= 0xffffffff; /* FIXME: make this clear only the |
374 | real existing bits */ | |
375 | outl(status,card->io_port+CSR5); | |
1da177e4 | 376 | |
f3b197ac JG |
377 | |
378 | for (i=0;i<NUMDESCRIPTORS;i++) | |
1da177e4 | 379 | investigate_write_descriptor(dev,card,i,bufferoffsets[i]); |
f3b197ac | 380 | for (i=0;i<NUMDESCRIPTORS;i++) |
1da177e4 LT |
381 | investigate_read_descriptor(dev,card,i,bufferoffsets[i]); |
382 | ||
f3b197ac | 383 | |
1da177e4 LT |
384 | spin_unlock(&card->lock); |
385 | leave("xircom_interrupt"); | |
386 | return IRQ_HANDLED; | |
387 | } | |
388 | ||
389 | static int xircom_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
390 | { | |
391 | struct xircom_private *card; | |
392 | unsigned long flags; | |
393 | int nextdescriptor; | |
394 | int desc; | |
395 | enter("xircom_start_xmit"); | |
f3b197ac | 396 | |
1da177e4 LT |
397 | card = netdev_priv(dev); |
398 | spin_lock_irqsave(&card->lock,flags); | |
f3b197ac | 399 | |
1da177e4 | 400 | /* First see if we can free some descriptors */ |
f3b197ac | 401 | for (desc=0;desc<NUMDESCRIPTORS;desc++) |
1da177e4 | 402 | investigate_write_descriptor(dev,card,desc,bufferoffsets[desc]); |
f3b197ac JG |
403 | |
404 | ||
1da177e4 LT |
405 | nextdescriptor = (card->transmit_used +1) % (NUMDESCRIPTORS); |
406 | desc = card->transmit_used; | |
f3b197ac | 407 | |
1da177e4 LT |
408 | /* only send the packet if the descriptor is free */ |
409 | if (card->tx_buffer[4*desc]==0) { | |
410 | /* Copy the packet data; zero the memory first as the card | |
411 | sometimes sends more than you ask it to. */ | |
f3b197ac | 412 | |
1da177e4 | 413 | memset(&card->tx_buffer[bufferoffsets[desc]/4],0,1536); |
d626f62b ACM |
414 | skb_copy_from_linear_data(skb, |
415 | &(card->tx_buffer[bufferoffsets[desc] / 4]), | |
416 | skb->len); | |
1da177e4 LT |
417 | /* FIXME: The specification tells us that the length we send HAS to be a multiple of |
418 | 4 bytes. */ | |
f3b197ac | 419 | |
1da177e4 LT |
420 | card->tx_buffer[4*desc+1] = skb->len; |
421 | if (desc == NUMDESCRIPTORS-1) | |
422 | card->tx_buffer[4*desc+1] |= (1<<25); /* bit 25: last descriptor of the ring */ | |
423 | ||
424 | card->tx_buffer[4*desc+1] |= 0xF0000000; | |
f3b197ac | 425 | /* 0xF0... means want interrupts*/ |
1da177e4 | 426 | card->tx_skb[desc] = skb; |
f3b197ac | 427 | |
1da177e4 LT |
428 | wmb(); |
429 | /* This gives the descriptor to the card */ | |
430 | card->tx_buffer[4*desc] = 0x80000000; | |
431 | trigger_transmit(card); | |
432 | if (((int)card->tx_buffer[nextdescriptor*4])<0) { /* next descriptor is occupied... */ | |
433 | netif_stop_queue(dev); | |
434 | } | |
435 | card->transmit_used = nextdescriptor; | |
f3b197ac | 436 | leave("xircom-start_xmit - sent"); |
1da177e4 LT |
437 | spin_unlock_irqrestore(&card->lock,flags); |
438 | return 0; | |
439 | } | |
f3b197ac | 440 | |
1da177e4 LT |
441 | |
442 | ||
443 | /* Uh oh... no free descriptor... drop the packet */ | |
444 | netif_stop_queue(dev); | |
445 | spin_unlock_irqrestore(&card->lock,flags); | |
446 | trigger_transmit(card); | |
f3b197ac | 447 | |
1da177e4 LT |
448 | return -EIO; |
449 | } | |
450 | ||
451 | ||
452 | ||
453 | ||
454 | static int xircom_open(struct net_device *dev) | |
455 | { | |
456 | struct xircom_private *xp = netdev_priv(dev); | |
457 | int retval; | |
458 | enter("xircom_open"); | |
459 | printk(KERN_INFO "xircom cardbus adaptor found, registering as %s, using irq %i \n",dev->name,dev->irq); | |
1fb9df5d | 460 | retval = request_irq(dev->irq, &xircom_interrupt, IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
461 | if (retval) { |
462 | leave("xircom_open - No IRQ"); | |
463 | return retval; | |
464 | } | |
f3b197ac | 465 | |
1da177e4 LT |
466 | xircom_up(xp); |
467 | xp->open = 1; | |
468 | leave("xircom_open"); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static int xircom_close(struct net_device *dev) | |
473 | { | |
474 | struct xircom_private *card; | |
475 | unsigned long flags; | |
f3b197ac | 476 | |
1da177e4 LT |
477 | enter("xircom_close"); |
478 | card = netdev_priv(dev); | |
479 | netif_stop_queue(dev); /* we don't want new packets */ | |
480 | ||
f3b197ac | 481 | |
1da177e4 | 482 | spin_lock_irqsave(&card->lock,flags); |
f3b197ac | 483 | |
1da177e4 | 484 | disable_all_interrupts(card); |
f3b197ac | 485 | #if 0 |
1da177e4 LT |
486 | /* We can enable this again once we send dummy packets on ifconfig ethX up */ |
487 | deactivate_receiver(card); | |
488 | deactivate_transmitter(card); | |
f3b197ac | 489 | #endif |
1da177e4 | 490 | remove_descriptors(card); |
f3b197ac | 491 | |
1da177e4 | 492 | spin_unlock_irqrestore(&card->lock,flags); |
f3b197ac | 493 | |
1da177e4 LT |
494 | card->open = 0; |
495 | free_irq(dev->irq,dev); | |
f3b197ac | 496 | |
1da177e4 | 497 | leave("xircom_close"); |
f3b197ac | 498 | |
1da177e4 | 499 | return 0; |
f3b197ac | 500 | |
1da177e4 LT |
501 | } |
502 | ||
503 | ||
504 | ||
505 | static struct net_device_stats *xircom_get_stats(struct net_device *dev) | |
506 | { | |
507 | struct xircom_private *card = netdev_priv(dev); | |
508 | return &card->stats; | |
f3b197ac JG |
509 | } |
510 | ||
1da177e4 LT |
511 | |
512 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
513 | static void xircom_poll_controller(struct net_device *dev) | |
514 | { | |
515 | disable_irq(dev->irq); | |
7d12e780 | 516 | xircom_interrupt(dev->irq, dev); |
1da177e4 LT |
517 | enable_irq(dev->irq); |
518 | } | |
519 | #endif | |
520 | ||
521 | ||
522 | static void initialize_card(struct xircom_private *card) | |
523 | { | |
524 | unsigned int val; | |
525 | unsigned long flags; | |
526 | enter("initialize_card"); | |
527 | ||
528 | ||
529 | spin_lock_irqsave(&card->lock, flags); | |
530 | ||
531 | /* First: reset the card */ | |
532 | val = inl(card->io_port + CSR0); | |
533 | val |= 0x01; /* Software reset */ | |
534 | outl(val, card->io_port + CSR0); | |
535 | ||
536 | udelay(100); /* give the card some time to reset */ | |
537 | ||
538 | val = inl(card->io_port + CSR0); | |
539 | val &= ~0x01; /* disable Software reset */ | |
540 | outl(val, card->io_port + CSR0); | |
541 | ||
542 | ||
f3b197ac | 543 | val = 0; /* Value 0x00 is a safe and conservative value |
1da177e4 LT |
544 | for the PCI configuration settings */ |
545 | outl(val, card->io_port + CSR0); | |
546 | ||
547 | ||
548 | disable_all_interrupts(card); | |
549 | deactivate_receiver(card); | |
550 | deactivate_transmitter(card); | |
551 | ||
552 | spin_unlock_irqrestore(&card->lock, flags); | |
553 | ||
554 | leave("initialize_card"); | |
555 | } | |
556 | ||
557 | /* | |
558 | trigger_transmit causes the card to check for frames to be transmitted. | |
559 | This is accomplished by writing to the CSR1 port. The documentation | |
560 | claims that the act of writing is sufficient and that the value is | |
561 | ignored; I chose zero. | |
562 | */ | |
563 | static void trigger_transmit(struct xircom_private *card) | |
564 | { | |
565 | unsigned int val; | |
566 | enter("trigger_transmit"); | |
567 | ||
568 | val = 0; | |
569 | outl(val, card->io_port + CSR1); | |
570 | ||
571 | leave("trigger_transmit"); | |
572 | } | |
573 | ||
574 | /* | |
575 | trigger_receive causes the card to check for empty frames in the | |
576 | descriptor list in which packets can be received. | |
577 | This is accomplished by writing to the CSR2 port. The documentation | |
578 | claims that the act of writing is sufficient and that the value is | |
579 | ignored; I chose zero. | |
580 | */ | |
581 | static void trigger_receive(struct xircom_private *card) | |
582 | { | |
583 | unsigned int val; | |
584 | enter("trigger_receive"); | |
585 | ||
586 | val = 0; | |
587 | outl(val, card->io_port + CSR2); | |
588 | ||
589 | leave("trigger_receive"); | |
590 | } | |
591 | ||
592 | /* | |
593 | setup_descriptors initializes the send and receive buffers to be valid | |
594 | descriptors and programs the addresses into the card. | |
595 | */ | |
596 | static void setup_descriptors(struct xircom_private *card) | |
597 | { | |
598 | unsigned int val; | |
599 | unsigned int address; | |
600 | int i; | |
601 | enter("setup_descriptors"); | |
602 | ||
603 | ||
a707cd6e ES |
604 | BUG_ON(card->rx_buffer == NULL); |
605 | BUG_ON(card->tx_buffer == NULL); | |
1da177e4 LT |
606 | |
607 | /* Receive descriptors */ | |
608 | memset(card->rx_buffer, 0, 128); /* clear the descriptors */ | |
609 | for (i=0;i<NUMDESCRIPTORS;i++ ) { | |
610 | ||
611 | /* Rx Descr0: It's empty, let the card own it, no errors -> 0x80000000 */ | |
612 | card->rx_buffer[i*4 + 0] = 0x80000000; | |
613 | /* Rx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ | |
614 | card->rx_buffer[i*4 + 1] = 1536; | |
615 | if (i==NUMDESCRIPTORS-1) | |
616 | card->rx_buffer[i*4 + 1] |= (1 << 25); /* bit 25 is "last descriptor" */ | |
617 | ||
618 | /* Rx Descr2: address of the buffer | |
619 | we store the buffer at the 2nd half of the page */ | |
f3b197ac | 620 | |
1da177e4 LT |
621 | address = (unsigned long) card->rx_dma_handle; |
622 | card->rx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); | |
623 | /* Rx Desc3: address of 2nd buffer -> 0 */ | |
624 | card->rx_buffer[i*4 + 3] = 0; | |
625 | } | |
f3b197ac | 626 | |
1da177e4 LT |
627 | wmb(); |
628 | /* Write the receive descriptor ring address to the card */ | |
629 | address = (unsigned long) card->rx_dma_handle; | |
f3b197ac | 630 | val = cpu_to_le32(address); |
1da177e4 LT |
631 | outl(val, card->io_port + CSR3); /* Receive descr list address */ |
632 | ||
633 | ||
634 | /* transmit descriptors */ | |
635 | memset(card->tx_buffer, 0, 128); /* clear the descriptors */ | |
f3b197ac | 636 | |
1da177e4 LT |
637 | for (i=0;i<NUMDESCRIPTORS;i++ ) { |
638 | /* Tx Descr0: Empty, we own it, no errors -> 0x00000000 */ | |
639 | card->tx_buffer[i*4 + 0] = 0x00000000; | |
640 | /* Tx Descr1: buffer 1 is 1536 bytes, buffer 2 is 0 bytes */ | |
641 | card->tx_buffer[i*4 + 1] = 1536; | |
642 | if (i==NUMDESCRIPTORS-1) | |
643 | card->tx_buffer[i*4 + 1] |= (1 << 25); /* bit 25 is "last descriptor" */ | |
f3b197ac | 644 | |
1da177e4 LT |
645 | /* Tx Descr2: address of the buffer |
646 | we store the buffer at the 2nd half of the page */ | |
647 | address = (unsigned long) card->tx_dma_handle; | |
648 | card->tx_buffer[i*4 + 2] = cpu_to_le32(address + bufferoffsets[i]); | |
649 | /* Tx Desc3: address of 2nd buffer -> 0 */ | |
650 | card->tx_buffer[i*4 + 3] = 0; | |
651 | } | |
652 | ||
653 | wmb(); | |
654 | /* wite the transmit descriptor ring to the card */ | |
655 | address = (unsigned long) card->tx_dma_handle; | |
656 | val =cpu_to_le32(address); | |
657 | outl(val, card->io_port + CSR4); /* xmit descr list address */ | |
658 | ||
659 | leave("setup_descriptors"); | |
660 | } | |
661 | ||
662 | /* | |
663 | remove_descriptors informs the card the descriptors are no longer | |
664 | valid by setting the address in the card to 0x00. | |
665 | */ | |
666 | static void remove_descriptors(struct xircom_private *card) | |
667 | { | |
668 | unsigned int val; | |
669 | enter("remove_descriptors"); | |
670 | ||
671 | val = 0; | |
672 | outl(val, card->io_port + CSR3); /* Receive descriptor address */ | |
673 | outl(val, card->io_port + CSR4); /* Send descriptor address */ | |
674 | ||
675 | leave("remove_descriptors"); | |
676 | } | |
677 | ||
678 | /* | |
679 | link_status_changed returns 1 if the card has indicated that | |
680 | the link status has changed. The new link status has to be read from CSR12. | |
681 | ||
682 | This function also clears the status-bit. | |
683 | */ | |
684 | static int link_status_changed(struct xircom_private *card) | |
685 | { | |
686 | unsigned int val; | |
687 | enter("link_status_changed"); | |
688 | ||
689 | val = inl(card->io_port + CSR5); /* Status register */ | |
690 | ||
691 | if ((val & (1 << 27)) == 0) { /* no change */ | |
692 | leave("link_status_changed - nochange"); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | /* clear the event by writing a 1 to the bit in the | |
697 | status register. */ | |
698 | val = (1 << 27); | |
699 | outl(val, card->io_port + CSR5); | |
700 | ||
701 | leave("link_status_changed - changed"); | |
702 | return 1; | |
703 | } | |
704 | ||
705 | ||
706 | /* | |
707 | transmit_active returns 1 if the transmitter on the card is | |
708 | in a non-stopped state. | |
709 | */ | |
710 | static int transmit_active(struct xircom_private *card) | |
711 | { | |
712 | unsigned int val; | |
713 | enter("transmit_active"); | |
714 | ||
715 | val = inl(card->io_port + CSR5); /* Status register */ | |
716 | ||
717 | if ((val & (7 << 20)) == 0) { /* transmitter disabled */ | |
718 | leave("transmit_active - inactive"); | |
719 | return 0; | |
720 | } | |
721 | ||
722 | leave("transmit_active - active"); | |
723 | return 1; | |
724 | } | |
725 | ||
726 | /* | |
727 | receive_active returns 1 if the receiver on the card is | |
728 | in a non-stopped state. | |
729 | */ | |
730 | static int receive_active(struct xircom_private *card) | |
731 | { | |
732 | unsigned int val; | |
733 | enter("receive_active"); | |
734 | ||
735 | ||
736 | val = inl(card->io_port + CSR5); /* Status register */ | |
737 | ||
738 | if ((val & (7 << 17)) == 0) { /* receiver disabled */ | |
739 | leave("receive_active - inactive"); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | leave("receive_active - active"); | |
744 | return 1; | |
745 | } | |
746 | ||
747 | /* | |
748 | activate_receiver enables the receiver on the card. | |
749 | Before being allowed to active the receiver, the receiver | |
750 | must be completely de-activated. To achieve this, | |
f3b197ac | 751 | this code actually disables the receiver first; then it waits for the |
1da177e4 LT |
752 | receiver to become inactive, then it activates the receiver and then |
753 | it waits for the receiver to be active. | |
754 | ||
755 | must be called with the lock held and interrupts disabled. | |
756 | */ | |
757 | static void activate_receiver(struct xircom_private *card) | |
758 | { | |
759 | unsigned int val; | |
760 | int counter; | |
761 | enter("activate_receiver"); | |
762 | ||
763 | ||
764 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
f3b197ac | 765 | |
1da177e4 LT |
766 | /* If the "active" bit is set and the receiver is already |
767 | active, no need to do the expensive thing */ | |
768 | if ((val&2) && (receive_active(card))) | |
769 | return; | |
f3b197ac JG |
770 | |
771 | ||
1da177e4 LT |
772 | val = val & ~2; /* disable the receiver */ |
773 | outl(val, card->io_port + CSR6); | |
774 | ||
775 | counter = 10; | |
776 | while (counter > 0) { | |
777 | if (!receive_active(card)) | |
778 | break; | |
779 | /* wait a while */ | |
780 | udelay(50); | |
781 | counter--; | |
782 | if (counter <= 0) | |
783 | printk(KERN_ERR "xircom_cb: Receiver failed to deactivate\n"); | |
784 | } | |
785 | ||
786 | /* enable the receiver */ | |
787 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
788 | val = val | 2; /* enable the receiver */ | |
789 | outl(val, card->io_port + CSR6); | |
790 | ||
791 | /* now wait for the card to activate again */ | |
792 | counter = 10; | |
793 | while (counter > 0) { | |
794 | if (receive_active(card)) | |
795 | break; | |
796 | /* wait a while */ | |
797 | udelay(50); | |
798 | counter--; | |
799 | if (counter <= 0) | |
800 | printk(KERN_ERR "xircom_cb: Receiver failed to re-activate\n"); | |
801 | } | |
802 | ||
803 | leave("activate_receiver"); | |
804 | } | |
805 | ||
806 | /* | |
807 | deactivate_receiver disables the receiver on the card. | |
f3b197ac | 808 | To achieve this this code disables the receiver first; |
1da177e4 LT |
809 | then it waits for the receiver to become inactive. |
810 | ||
811 | must be called with the lock held and interrupts disabled. | |
812 | */ | |
813 | static void deactivate_receiver(struct xircom_private *card) | |
814 | { | |
815 | unsigned int val; | |
816 | int counter; | |
817 | enter("deactivate_receiver"); | |
818 | ||
819 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
820 | val = val & ~2; /* disable the receiver */ | |
821 | outl(val, card->io_port + CSR6); | |
822 | ||
823 | counter = 10; | |
824 | while (counter > 0) { | |
825 | if (!receive_active(card)) | |
826 | break; | |
827 | /* wait a while */ | |
828 | udelay(50); | |
829 | counter--; | |
830 | if (counter <= 0) | |
831 | printk(KERN_ERR "xircom_cb: Receiver failed to deactivate\n"); | |
832 | } | |
833 | ||
834 | ||
835 | leave("deactivate_receiver"); | |
836 | } | |
837 | ||
838 | ||
839 | /* | |
840 | activate_transmitter enables the transmitter on the card. | |
841 | Before being allowed to active the transmitter, the transmitter | |
842 | must be completely de-activated. To achieve this, | |
f3b197ac | 843 | this code actually disables the transmitter first; then it waits for the |
1da177e4 LT |
844 | transmitter to become inactive, then it activates the transmitter and then |
845 | it waits for the transmitter to be active again. | |
846 | ||
847 | must be called with the lock held and interrupts disabled. | |
848 | */ | |
849 | static void activate_transmitter(struct xircom_private *card) | |
850 | { | |
851 | unsigned int val; | |
852 | int counter; | |
853 | enter("activate_transmitter"); | |
854 | ||
855 | ||
856 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
857 | ||
858 | /* If the "active" bit is set and the receiver is already | |
f3b197ac | 859 | active, no need to do the expensive thing */ |
1da177e4 LT |
860 | if ((val&(1<<13)) && (transmit_active(card))) |
861 | return; | |
862 | ||
863 | val = val & ~(1 << 13); /* disable the transmitter */ | |
864 | outl(val, card->io_port + CSR6); | |
865 | ||
866 | counter = 10; | |
867 | while (counter > 0) { | |
868 | if (!transmit_active(card)) | |
869 | break; | |
870 | /* wait a while */ | |
871 | udelay(50); | |
872 | counter--; | |
873 | if (counter <= 0) | |
874 | printk(KERN_ERR "xircom_cb: Transmitter failed to deactivate\n"); | |
875 | } | |
876 | ||
877 | /* enable the transmitter */ | |
878 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
879 | val = val | (1 << 13); /* enable the transmitter */ | |
880 | outl(val, card->io_port + CSR6); | |
881 | ||
882 | /* now wait for the card to activate again */ | |
883 | counter = 10; | |
884 | while (counter > 0) { | |
885 | if (transmit_active(card)) | |
886 | break; | |
887 | /* wait a while */ | |
888 | udelay(50); | |
889 | counter--; | |
890 | if (counter <= 0) | |
891 | printk(KERN_ERR "xircom_cb: Transmitter failed to re-activate\n"); | |
892 | } | |
893 | ||
894 | leave("activate_transmitter"); | |
895 | } | |
896 | ||
897 | /* | |
898 | deactivate_transmitter disables the transmitter on the card. | |
f3b197ac | 899 | To achieve this this code disables the transmitter first; |
1da177e4 LT |
900 | then it waits for the transmitter to become inactive. |
901 | ||
902 | must be called with the lock held and interrupts disabled. | |
903 | */ | |
904 | static void deactivate_transmitter(struct xircom_private *card) | |
905 | { | |
906 | unsigned int val; | |
907 | int counter; | |
908 | enter("deactivate_transmitter"); | |
909 | ||
910 | val = inl(card->io_port + CSR6); /* Operation mode */ | |
911 | val = val & ~2; /* disable the transmitter */ | |
912 | outl(val, card->io_port + CSR6); | |
913 | ||
914 | counter = 20; | |
915 | while (counter > 0) { | |
916 | if (!transmit_active(card)) | |
917 | break; | |
918 | /* wait a while */ | |
919 | udelay(50); | |
920 | counter--; | |
921 | if (counter <= 0) | |
922 | printk(KERN_ERR "xircom_cb: Transmitter failed to deactivate\n"); | |
923 | } | |
924 | ||
925 | ||
926 | leave("deactivate_transmitter"); | |
927 | } | |
928 | ||
929 | ||
930 | /* | |
931 | enable_transmit_interrupt enables the transmit interrupt | |
932 | ||
933 | must be called with the lock held and interrupts disabled. | |
934 | */ | |
935 | static void enable_transmit_interrupt(struct xircom_private *card) | |
936 | { | |
937 | unsigned int val; | |
938 | enter("enable_transmit_interrupt"); | |
939 | ||
940 | val = inl(card->io_port + CSR7); /* Interrupt enable register */ | |
941 | val |= 1; /* enable the transmit interrupt */ | |
942 | outl(val, card->io_port + CSR7); | |
943 | ||
944 | leave("enable_transmit_interrupt"); | |
945 | } | |
946 | ||
947 | ||
948 | /* | |
949 | enable_receive_interrupt enables the receive interrupt | |
950 | ||
951 | must be called with the lock held and interrupts disabled. | |
952 | */ | |
953 | static void enable_receive_interrupt(struct xircom_private *card) | |
954 | { | |
955 | unsigned int val; | |
956 | enter("enable_receive_interrupt"); | |
957 | ||
958 | val = inl(card->io_port + CSR7); /* Interrupt enable register */ | |
959 | val = val | (1 << 6); /* enable the receive interrupt */ | |
960 | outl(val, card->io_port + CSR7); | |
961 | ||
962 | leave("enable_receive_interrupt"); | |
963 | } | |
964 | ||
965 | /* | |
966 | enable_link_interrupt enables the link status change interrupt | |
967 | ||
968 | must be called with the lock held and interrupts disabled. | |
969 | */ | |
970 | static void enable_link_interrupt(struct xircom_private *card) | |
971 | { | |
972 | unsigned int val; | |
973 | enter("enable_link_interrupt"); | |
974 | ||
975 | val = inl(card->io_port + CSR7); /* Interrupt enable register */ | |
976 | val = val | (1 << 27); /* enable the link status chage interrupt */ | |
977 | outl(val, card->io_port + CSR7); | |
978 | ||
979 | leave("enable_link_interrupt"); | |
980 | } | |
981 | ||
982 | ||
983 | ||
984 | /* | |
985 | disable_all_interrupts disables all interrupts | |
986 | ||
987 | must be called with the lock held and interrupts disabled. | |
988 | */ | |
989 | static void disable_all_interrupts(struct xircom_private *card) | |
990 | { | |
991 | unsigned int val; | |
992 | enter("enable_all_interrupts"); | |
f3b197ac | 993 | |
1da177e4 LT |
994 | val = 0; /* disable all interrupts */ |
995 | outl(val, card->io_port + CSR7); | |
996 | ||
997 | leave("disable_all_interrupts"); | |
998 | } | |
999 | ||
1000 | /* | |
1001 | enable_common_interrupts enables several weird interrupts | |
1002 | ||
1003 | must be called with the lock held and interrupts disabled. | |
1004 | */ | |
1005 | static void enable_common_interrupts(struct xircom_private *card) | |
1006 | { | |
1007 | unsigned int val; | |
1008 | enter("enable_link_interrupt"); | |
1009 | ||
1010 | val = inl(card->io_port + CSR7); /* Interrupt enable register */ | |
1011 | val |= (1<<16); /* Normal Interrupt Summary */ | |
1012 | val |= (1<<15); /* Abnormal Interrupt Summary */ | |
1013 | val |= (1<<13); /* Fatal bus error */ | |
1014 | val |= (1<<8); /* Receive Process Stopped */ | |
1015 | val |= (1<<7); /* Receive Buffer Unavailable */ | |
1016 | val |= (1<<5); /* Transmit Underflow */ | |
1017 | val |= (1<<2); /* Transmit Buffer Unavailable */ | |
1018 | val |= (1<<1); /* Transmit Process Stopped */ | |
1019 | outl(val, card->io_port + CSR7); | |
1020 | ||
1021 | leave("enable_link_interrupt"); | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | enable_promisc starts promisc mode | |
1026 | ||
1027 | must be called with the lock held and interrupts disabled. | |
1028 | */ | |
1029 | static int enable_promisc(struct xircom_private *card) | |
1030 | { | |
1031 | unsigned int val; | |
1032 | enter("enable_promisc"); | |
1033 | ||
f3b197ac JG |
1034 | val = inl(card->io_port + CSR6); |
1035 | val = val | (1 << 6); | |
1da177e4 LT |
1036 | outl(val, card->io_port + CSR6); |
1037 | ||
1038 | leave("enable_promisc"); | |
1039 | return 1; | |
1040 | } | |
1041 | ||
1042 | ||
1043 | ||
1044 | ||
f3b197ac | 1045 | /* |
59c51591 | 1046 | link_status() checks the links status and will return 0 for no link, 10 for 10mbit link and 100 for.. guess what. |
1da177e4 LT |
1047 | |
1048 | Must be called in locked state with interrupts disabled | |
1049 | */ | |
1050 | static int link_status(struct xircom_private *card) | |
1051 | { | |
1052 | unsigned int val; | |
1053 | enter("link_status"); | |
f3b197ac | 1054 | |
1da177e4 | 1055 | val = inb(card->io_port + CSR12); |
f3b197ac | 1056 | |
1da177e4 LT |
1057 | if (!(val&(1<<2))) /* bit 2 is 0 for 10mbit link, 1 for not an 10mbit link */ |
1058 | return 10; | |
1059 | if (!(val&(1<<1))) /* bit 1 is 0 for 100mbit link, 1 for not an 100mbit link */ | |
1060 | return 100; | |
f3b197ac JG |
1061 | |
1062 | /* If we get here -> no link at all */ | |
1da177e4 LT |
1063 | |
1064 | leave("link_status"); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | ||
1069 | ||
1070 | ||
1071 | ||
1072 | /* | |
1073 | read_mac_address() reads the MAC address from the NIC and stores it in the "dev" structure. | |
f3b197ac | 1074 | |
1da177e4 LT |
1075 | This function will take the spinlock itself and can, as a result, not be called with the lock helt. |
1076 | */ | |
1077 | static void read_mac_address(struct xircom_private *card) | |
1078 | { | |
1079 | unsigned char j, tuple, link, data_id, data_count; | |
1080 | unsigned long flags; | |
1081 | int i; | |
1082 | ||
1083 | enter("read_mac_address"); | |
f3b197ac | 1084 | |
1da177e4 LT |
1085 | spin_lock_irqsave(&card->lock, flags); |
1086 | ||
1087 | outl(1 << 12, card->io_port + CSR9); /* enable boot rom access */ | |
1088 | for (i = 0x100; i < 0x1f7; i += link + 2) { | |
1089 | outl(i, card->io_port + CSR10); | |
1090 | tuple = inl(card->io_port + CSR9) & 0xff; | |
1091 | outl(i + 1, card->io_port + CSR10); | |
1092 | link = inl(card->io_port + CSR9) & 0xff; | |
1093 | outl(i + 2, card->io_port + CSR10); | |
1094 | data_id = inl(card->io_port + CSR9) & 0xff; | |
1095 | outl(i + 3, card->io_port + CSR10); | |
1096 | data_count = inl(card->io_port + CSR9) & 0xff; | |
1097 | if ((tuple == 0x22) && (data_id == 0x04) && (data_count == 0x06)) { | |
f3b197ac | 1098 | /* |
1da177e4 LT |
1099 | * This is it. We have the data we want. |
1100 | */ | |
1101 | for (j = 0; j < 6; j++) { | |
1102 | outl(i + j + 4, card->io_port + CSR10); | |
1103 | card->dev->dev_addr[j] = inl(card->io_port + CSR9) & 0xff; | |
1104 | } | |
1105 | break; | |
1106 | } else if (link == 0) { | |
1107 | break; | |
1108 | } | |
1109 | } | |
1110 | spin_unlock_irqrestore(&card->lock, flags); | |
1111 | #ifdef DEBUG | |
1112 | for (i = 0; i < 6; i++) | |
1113 | printk("%c%2.2X", i ? ':' : ' ', card->dev->dev_addr[i]); | |
1114 | printk("\n"); | |
1115 | #endif | |
1116 | leave("read_mac_address"); | |
1117 | } | |
1118 | ||
1119 | ||
1120 | /* | |
1121 | transceiver_voodoo() enables the external UTP plug thingy. | |
1122 | it's called voodoo as I stole this code and cannot cross-reference | |
1123 | it with the specification. | |
1124 | */ | |
1125 | static void transceiver_voodoo(struct xircom_private *card) | |
1126 | { | |
1127 | unsigned long flags; | |
1128 | ||
1129 | enter("transceiver_voodoo"); | |
1130 | ||
1131 | /* disable all powermanagement */ | |
1132 | pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); | |
1133 | ||
1134 | setup_descriptors(card); | |
1135 | ||
1136 | spin_lock_irqsave(&card->lock, flags); | |
1137 | ||
1138 | outl(0x0008, card->io_port + CSR15); | |
f3b197ac | 1139 | udelay(25); |
1da177e4 LT |
1140 | outl(0xa8050000, card->io_port + CSR15); |
1141 | udelay(25); | |
1142 | outl(0xa00f0000, card->io_port + CSR15); | |
1143 | udelay(25); | |
f3b197ac | 1144 | |
1da177e4 LT |
1145 | spin_unlock_irqrestore(&card->lock, flags); |
1146 | ||
1147 | netif_start_queue(card->dev); | |
1148 | leave("transceiver_voodoo"); | |
1149 | } | |
1150 | ||
1151 | ||
1152 | static void xircom_up(struct xircom_private *card) | |
1153 | { | |
1154 | unsigned long flags; | |
1155 | int i; | |
1156 | ||
1157 | enter("xircom_up"); | |
1158 | ||
1159 | /* disable all powermanagement */ | |
1160 | pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000); | |
1161 | ||
1162 | setup_descriptors(card); | |
1163 | ||
1164 | spin_lock_irqsave(&card->lock, flags); | |
1165 | ||
f3b197ac | 1166 | |
1da177e4 LT |
1167 | enable_link_interrupt(card); |
1168 | enable_transmit_interrupt(card); | |
1169 | enable_receive_interrupt(card); | |
1170 | enable_common_interrupts(card); | |
1171 | enable_promisc(card); | |
f3b197ac | 1172 | |
1da177e4 | 1173 | /* The card can have received packets already, read them away now */ |
f3b197ac | 1174 | for (i=0;i<NUMDESCRIPTORS;i++) |
1da177e4 LT |
1175 | investigate_read_descriptor(card->dev,card,i,bufferoffsets[i]); |
1176 | ||
1177 | ||
1178 | spin_unlock_irqrestore(&card->lock, flags); | |
1179 | trigger_receive(card); | |
1180 | trigger_transmit(card); | |
1181 | netif_start_queue(card->dev); | |
1182 | leave("xircom_up"); | |
1183 | } | |
1184 | ||
1185 | /* Bufferoffset is in BYTES */ | |
1186 | static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset) | |
1187 | { | |
f3b197ac JG |
1188 | int status; |
1189 | ||
1da177e4 LT |
1190 | enter("investigate_read_descriptor"); |
1191 | status = card->rx_buffer[4*descnr]; | |
f3b197ac | 1192 | |
1da177e4 | 1193 | if ((status > 0)) { /* packet received */ |
f3b197ac | 1194 | |
1da177e4 | 1195 | /* TODO: discard error packets */ |
f3b197ac | 1196 | |
1da177e4 LT |
1197 | short pkt_len = ((status >> 16) & 0x7ff) - 4; /* minus 4, we don't want the CRC */ |
1198 | struct sk_buff *skb; | |
1199 | ||
1200 | if (pkt_len > 1518) { | |
1201 | printk(KERN_ERR "xircom_cb: Packet length %i is bogus \n",pkt_len); | |
1202 | pkt_len = 1518; | |
1203 | } | |
1204 | ||
1205 | skb = dev_alloc_skb(pkt_len + 2); | |
1206 | if (skb == NULL) { | |
1207 | card->stats.rx_dropped++; | |
1208 | goto out; | |
1209 | } | |
1da177e4 LT |
1210 | skb_reserve(skb, 2); |
1211 | eth_copy_and_sum(skb, (unsigned char*)&card->rx_buffer[bufferoffset / 4], pkt_len, 0); | |
1212 | skb_put(skb, pkt_len); | |
1213 | skb->protocol = eth_type_trans(skb, dev); | |
1214 | netif_rx(skb); | |
1215 | dev->last_rx = jiffies; | |
1216 | card->stats.rx_packets++; | |
1217 | card->stats.rx_bytes += pkt_len; | |
f3b197ac | 1218 | |
1da177e4 LT |
1219 | out: |
1220 | /* give the buffer back to the card */ | |
1221 | card->rx_buffer[4*descnr] = 0x80000000; | |
1222 | trigger_receive(card); | |
1223 | } | |
1224 | ||
1225 | leave("investigate_read_descriptor"); | |
1226 | ||
1227 | } | |
1228 | ||
1229 | ||
1230 | /* Bufferoffset is in BYTES */ | |
1231 | static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset) | |
1232 | { | |
1233 | int status; | |
1234 | ||
1235 | enter("investigate_write_descriptor"); | |
f3b197ac | 1236 | |
1da177e4 | 1237 | status = card->tx_buffer[4*descnr]; |
f3b197ac | 1238 | #if 0 |
1da177e4 LT |
1239 | if (status & 0x8000) { /* Major error */ |
1240 | printk(KERN_ERR "Major transmit error status %x \n", status); | |
1241 | card->tx_buffer[4*descnr] = 0; | |
1242 | netif_wake_queue (dev); | |
1243 | } | |
1244 | #endif | |
1245 | if (status > 0) { /* bit 31 is 0 when done */ | |
1246 | if (card->tx_skb[descnr]!=NULL) { | |
1247 | card->stats.tx_bytes += card->tx_skb[descnr]->len; | |
1248 | dev_kfree_skb_irq(card->tx_skb[descnr]); | |
1249 | } | |
1250 | card->tx_skb[descnr] = NULL; | |
1251 | /* Bit 8 in the status field is 1 if there was a collision */ | |
1252 | if (status&(1<<8)) | |
1253 | card->stats.collisions++; | |
1254 | card->tx_buffer[4*descnr] = 0; /* descriptor is free again */ | |
1255 | netif_wake_queue (dev); | |
1256 | card->stats.tx_packets++; | |
1257 | } | |
1258 | ||
1259 | leave("investigate_write_descriptor"); | |
f3b197ac | 1260 | |
1da177e4 LT |
1261 | } |
1262 | ||
1263 | ||
1264 | static int __init xircom_init(void) | |
1265 | { | |
ec42cdb6 | 1266 | return pci_register_driver(&xircom_ops); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | static void __exit xircom_exit(void) | |
1270 | { | |
1271 | pci_unregister_driver(&xircom_ops); | |
f3b197ac | 1272 | } |
1da177e4 | 1273 | |
f3b197ac | 1274 | module_init(xircom_init) |
1da177e4 LT |
1275 | module_exit(xircom_exit) |
1276 |