1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* sb1000.c: A General Instruments SB1000 driver for linux. */
3 /*
4 Written 1998 by Franco Venturi.
5
6 Copyright 1998 by Franco Venturi.
7 Copyright 1994,1995 by Donald Becker.
8 Copyright 1993 United States Government as represented by the
9 Director, National Security Agency.
10
11 This driver is for the General Instruments SB1000 (internal SURFboard)
12
13 The author may be reached as fventuri@mediaone.net
14
15
16 Changes:
17
18 981115 Steven Hirsch <shirsch@adelphia.net>
19
20 Linus changed the timer interface. Should work on all recent
21 development kernels.
22
23 980608 Steven Hirsch <shirsch@adelphia.net>
24
25 Small changes to make it work with 2.1.x kernels. Hopefully,
26 nothing major will change before official release of Linux 2.2.
27
28 Merged with 2.2 - Alan Cox
29 */
30
31 static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
32
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/sched.h>
36 #include <linux/string.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
40 #include <linux/in.h>
41 #include <linux/ioport.h>
42 #include <linux/netdevice.h>
43 #include <linux/if_arp.h>
44 #include <linux/skbuff.h>
45 #include <linux/delay.h> /* for udelay() */
46 #include <linux/etherdevice.h>
47 #include <linux/pnp.h>
48 #include <linux/init.h>
49 #include <linux/bitops.h>
50 #include <linux/gfp.h>
51
52 #include <asm/io.h>
53 #include <asm/processor.h>
54 #include <linux/uaccess.h>
55
56 #ifdef SB1000_DEBUG
57 static int sb1000_debug = SB1000_DEBUG;
58 #else
59 static const int sb1000_debug = 1;
60 #endif
61
62 static const int SB1000_IO_EXTENT = 8;
63 /* SB1000 Maximum Receive Unit */
64 static const int SB1000_MRU = 1500; /* octects */
65
66 #define NPIDS 4
67 struct sb1000_private {
68 struct sk_buff *rx_skb[NPIDS];
69 short rx_dlen[NPIDS];
70 unsigned int rx_frames;
71 short rx_error_count;
72 short rx_error_dpc_count;
73 unsigned char rx_session_id[NPIDS];
74 unsigned char rx_frame_id[NPIDS];
75 unsigned char rx_pkt_type[NPIDS];
76 };
77
78 /* prototypes for Linux interface */
79 extern int sb1000_probe(struct net_device *dev);
80 static int sb1000_open(struct net_device *dev);
81 static int sb1000_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
82 void __user *data, int cmd);
83 static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
84 struct net_device *dev);
85 static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
86 static int sb1000_close(struct net_device *dev);
87
88
89 /* SB1000 hardware routines to be used during open/configuration phases */
90 static int card_wait_for_busy_clear(const int ioaddr[],
91 const char* name);
92 static int card_wait_for_ready(const int ioaddr[], const char* name,
93 unsigned char in[]);
94 static int card_send_command(const int ioaddr[], const char* name,
95 const unsigned char out[], unsigned char in[]);
96
97 /* SB1000 hardware routines to be used during frame rx interrupt */
98 static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
99 static int sb1000_wait_for_ready_clear(const int ioaddr[],
100 const char* name);
101 static void sb1000_send_command(const int ioaddr[], const char* name,
102 const unsigned char out[]);
103 static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
104 static void sb1000_issue_read_command(const int ioaddr[],
105 const char* name);
106
107 /* SB1000 commands for open/configuration */
108 static int sb1000_reset(const int ioaddr[], const char* name);
109 static int sb1000_check_CRC(const int ioaddr[], const char* name);
110 static inline int sb1000_start_get_set_command(const int ioaddr[],
111 const char* name);
112 static int sb1000_end_get_set_command(const int ioaddr[],
113 const char* name);
114 static int sb1000_activate(const int ioaddr[], const char* name);
115 static int sb1000_get_firmware_version(const int ioaddr[],
116 const char* name, unsigned char version[], int do_end);
117 static int sb1000_get_frequency(const int ioaddr[], const char* name,
118 int* frequency);
119 static int sb1000_set_frequency(const int ioaddr[], const char* name,
120 int frequency);
121 static int sb1000_get_PIDs(const int ioaddr[], const char* name,
122 short PID[]);
123 static int sb1000_set_PIDs(const int ioaddr[], const char* name,
124 const short PID[]);
125
126 /* SB1000 commands for frame rx interrupt */
127 static int sb1000_rx(struct net_device *dev);
128 static void sb1000_error_dpc(struct net_device *dev);
129
130 static const struct pnp_device_id sb1000_pnp_ids[] = {
131 { "GIC1000", 0 },
132 { "", 0 }
133 };
134 MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
135
136 static const struct net_device_ops sb1000_netdev_ops = {
137 .ndo_open = sb1000_open,
138 .ndo_start_xmit = sb1000_start_xmit,
139 .ndo_siocdevprivate = sb1000_siocdevprivate,
140 .ndo_stop = sb1000_close,
141 .ndo_set_mac_address = eth_mac_addr,
142 .ndo_validate_addr = eth_validate_addr,
143 };
144
145 static int
sb1000_probe_one(struct pnp_dev * pdev,const struct pnp_device_id * id)146 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
147 {
148 struct net_device *dev;
149 unsigned short ioaddr[2], irq;
150 unsigned int serial_number;
151 int error = -ENODEV;
152 u8 addr[ETH_ALEN];
153
154 if (pnp_device_attach(pdev) < 0)
155 return -ENODEV;
156 if (pnp_activate_dev(pdev) < 0)
157 goto out_detach;
158
159 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
160 goto out_disable;
161 if (!pnp_irq_valid(pdev, 0))
162 goto out_disable;
163
164 serial_number = pdev->card->serial;
165
166 ioaddr[0] = pnp_port_start(pdev, 0);
167 ioaddr[1] = pnp_port_start(pdev, 0);
168
169 irq = pnp_irq(pdev, 0);
170
171 if (!request_region(ioaddr[0], 16, "sb1000"))
172 goto out_disable;
173 if (!request_region(ioaddr[1], 16, "sb1000"))
174 goto out_release_region0;
175
176 dev = alloc_etherdev(sizeof(struct sb1000_private));
177 if (!dev) {
178 error = -ENOMEM;
179 goto out_release_regions;
180 }
181
182
183 dev->base_addr = ioaddr[0];
184 /* mem_start holds the second I/O address */
185 dev->mem_start = ioaddr[1];
186 dev->irq = irq;
187
188 if (sb1000_debug > 0)
189 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
190 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
191 dev->mem_start, serial_number, dev->irq);
192
193 /*
194 * The SB1000 is an rx-only cable modem device. The uplink is a modem
195 * and we do not want to arp on it.
196 */
197 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
198
199 SET_NETDEV_DEV(dev, &pdev->dev);
200
201 if (sb1000_debug > 0)
202 printk(KERN_NOTICE "%s", version);
203
204 dev->netdev_ops = &sb1000_netdev_ops;
205
206 /* hardware address is 0:0:serial_number */
207 addr[0] = 0;
208 addr[1] = 0;
209 addr[2] = serial_number >> 24 & 0xff;
210 addr[3] = serial_number >> 16 & 0xff;
211 addr[4] = serial_number >> 8 & 0xff;
212 addr[5] = serial_number >> 0 & 0xff;
213 eth_hw_addr_set(dev, addr);
214
215 pnp_set_drvdata(pdev, dev);
216
217 error = register_netdev(dev);
218 if (error)
219 goto out_free_netdev;
220 return 0;
221
222 out_free_netdev:
223 free_netdev(dev);
224 out_release_regions:
225 release_region(ioaddr[1], 16);
226 out_release_region0:
227 release_region(ioaddr[0], 16);
228 out_disable:
229 pnp_disable_dev(pdev);
230 out_detach:
231 pnp_device_detach(pdev);
232 return error;
233 }
234
235 static void
sb1000_remove_one(struct pnp_dev * pdev)236 sb1000_remove_one(struct pnp_dev *pdev)
237 {
238 struct net_device *dev = pnp_get_drvdata(pdev);
239
240 unregister_netdev(dev);
241 release_region(dev->base_addr, 16);
242 release_region(dev->mem_start, 16);
243 free_netdev(dev);
244 }
245
246 static struct pnp_driver sb1000_driver = {
247 .name = "sb1000",
248 .id_table = sb1000_pnp_ids,
249 .probe = sb1000_probe_one,
250 .remove = sb1000_remove_one,
251 };
252
253
254 /*
255 * SB1000 hardware routines to be used during open/configuration phases
256 */
257
258 static const int TimeOutJiffies = (875 * HZ) / 100;
259
260 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
261 static int
card_wait_for_busy_clear(const int ioaddr[],const char * name)262 card_wait_for_busy_clear(const int ioaddr[], const char* name)
263 {
264 unsigned char a;
265 unsigned long timeout;
266
267 a = inb(ioaddr[0] + 7);
268 timeout = jiffies + TimeOutJiffies;
269 while (a & 0x80 || a & 0x40) {
270 /* a little sleep */
271 yield();
272
273 a = inb(ioaddr[0] + 7);
274 if (time_after_eq(jiffies, timeout)) {
275 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
276 name);
277 return -ETIME;
278 }
279 }
280
281 return 0;
282 }
283
284 /* Card Wait For Ready (cannot be used during an interrupt) */
285 static int
card_wait_for_ready(const int ioaddr[],const char * name,unsigned char in[])286 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
287 {
288 unsigned char a;
289 unsigned long timeout;
290
291 a = inb(ioaddr[1] + 6);
292 timeout = jiffies + TimeOutJiffies;
293 while (a & 0x80 || !(a & 0x40)) {
294 /* a little sleep */
295 yield();
296
297 a = inb(ioaddr[1] + 6);
298 if (time_after_eq(jiffies, timeout)) {
299 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
300 name);
301 return -ETIME;
302 }
303 }
304
305 in[1] = inb(ioaddr[0] + 1);
306 in[2] = inb(ioaddr[0] + 2);
307 in[3] = inb(ioaddr[0] + 3);
308 in[4] = inb(ioaddr[0] + 4);
309 in[0] = inb(ioaddr[0] + 5);
310 in[6] = inb(ioaddr[0] + 6);
311 in[5] = inb(ioaddr[1] + 6);
312 return 0;
313 }
314
315 /* Card Send Command (cannot be used during an interrupt) */
316 static int
card_send_command(const int ioaddr[],const char * name,const unsigned char out[],unsigned char in[])317 card_send_command(const int ioaddr[], const char* name,
318 const unsigned char out[], unsigned char in[])
319 {
320 int status;
321
322 if ((status = card_wait_for_busy_clear(ioaddr, name)))
323 return status;
324 outb(0xa0, ioaddr[0] + 6);
325 outb(out[2], ioaddr[0] + 1);
326 outb(out[3], ioaddr[0] + 2);
327 outb(out[4], ioaddr[0] + 3);
328 outb(out[5], ioaddr[0] + 4);
329 outb(out[1], ioaddr[0] + 5);
330 outb(0xa0, ioaddr[0] + 6);
331 outb(out[0], ioaddr[0] + 7);
332 if (out[0] != 0x20 && out[0] != 0x30) {
333 if ((status = card_wait_for_ready(ioaddr, name, in)))
334 return status;
335 inb(ioaddr[0] + 7);
336 if (sb1000_debug > 3)
337 printk(KERN_DEBUG "%s: card_send_command "
338 "out: %02x%02x%02x%02x%02x%02x "
339 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
340 out[0], out[1], out[2], out[3], out[4], out[5],
341 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
342 } else {
343 if (sb1000_debug > 3)
344 printk(KERN_DEBUG "%s: card_send_command "
345 "out: %02x%02x%02x%02x%02x%02x\n", name,
346 out[0], out[1], out[2], out[3], out[4], out[5]);
347 }
348
349 if (out[1] != 0x1b) {
350 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
351 return -EIO;
352 }
353 return 0;
354 }
355
356
357 /*
358 * SB1000 hardware routines to be used during frame rx interrupt
359 */
360 static const int Sb1000TimeOutJiffies = 7 * HZ;
361
362 /* Card Wait For Ready (to be used during frame rx) */
363 static int
sb1000_wait_for_ready(const int ioaddr[],const char * name)364 sb1000_wait_for_ready(const int ioaddr[], const char* name)
365 {
366 unsigned long timeout;
367
368 timeout = jiffies + Sb1000TimeOutJiffies;
369 while (inb(ioaddr[1] + 6) & 0x80) {
370 if (time_after_eq(jiffies, timeout)) {
371 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
372 name);
373 return -ETIME;
374 }
375 }
376 timeout = jiffies + Sb1000TimeOutJiffies;
377 while (!(inb(ioaddr[1] + 6) & 0x40)) {
378 if (time_after_eq(jiffies, timeout)) {
379 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
380 name);
381 return -ETIME;
382 }
383 }
384 inb(ioaddr[0] + 7);
385 return 0;
386 }
387
388 /* Card Wait For Ready Clear (to be used during frame rx) */
389 static int
sb1000_wait_for_ready_clear(const int ioaddr[],const char * name)390 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
391 {
392 unsigned long timeout;
393
394 timeout = jiffies + Sb1000TimeOutJiffies;
395 while (inb(ioaddr[1] + 6) & 0x80) {
396 if (time_after_eq(jiffies, timeout)) {
397 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
398 name);
399 return -ETIME;
400 }
401 }
402 timeout = jiffies + Sb1000TimeOutJiffies;
403 while (inb(ioaddr[1] + 6) & 0x40) {
404 if (time_after_eq(jiffies, timeout)) {
405 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
406 name);
407 return -ETIME;
408 }
409 }
410 return 0;
411 }
412
413 /* Card Send Command (to be used during frame rx) */
414 static void
sb1000_send_command(const int ioaddr[],const char * name,const unsigned char out[])415 sb1000_send_command(const int ioaddr[], const char* name,
416 const unsigned char out[])
417 {
418 outb(out[2], ioaddr[0] + 1);
419 outb(out[3], ioaddr[0] + 2);
420 outb(out[4], ioaddr[0] + 3);
421 outb(out[5], ioaddr[0] + 4);
422 outb(out[1], ioaddr[0] + 5);
423 outb(out[0], ioaddr[0] + 7);
424 if (sb1000_debug > 3)
425 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
426 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
427 }
428
429 /* Card Read Status (to be used during frame rx) */
430 static void
sb1000_read_status(const int ioaddr[],unsigned char in[])431 sb1000_read_status(const int ioaddr[], unsigned char in[])
432 {
433 in[1] = inb(ioaddr[0] + 1);
434 in[2] = inb(ioaddr[0] + 2);
435 in[3] = inb(ioaddr[0] + 3);
436 in[4] = inb(ioaddr[0] + 4);
437 in[0] = inb(ioaddr[0] + 5);
438 }
439
440 /* Issue Read Command (to be used during frame rx) */
441 static void
sb1000_issue_read_command(const int ioaddr[],const char * name)442 sb1000_issue_read_command(const int ioaddr[], const char* name)
443 {
444 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
445
446 sb1000_wait_for_ready_clear(ioaddr, name);
447 outb(0xa0, ioaddr[0] + 6);
448 sb1000_send_command(ioaddr, name, Command0);
449 }
450
451
452 /*
453 * SB1000 commands for open/configuration
454 */
455 /* reset SB1000 card */
456 static int
sb1000_reset(const int ioaddr[],const char * name)457 sb1000_reset(const int ioaddr[], const char* name)
458 {
459 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
460
461 unsigned char st[7];
462 int port, status;
463
464 port = ioaddr[1] + 6;
465 outb(0x4, port);
466 inb(port);
467 udelay(1000);
468 outb(0x0, port);
469 inb(port);
470 ssleep(1);
471 outb(0x4, port);
472 inb(port);
473 udelay(1000);
474 outb(0x0, port);
475 inb(port);
476 udelay(0);
477
478 if ((status = card_send_command(ioaddr, name, Command0, st)))
479 return status;
480 if (st[3] != 0xf0)
481 return -EIO;
482 return 0;
483 }
484
485 /* check SB1000 firmware CRC */
486 static int
sb1000_check_CRC(const int ioaddr[],const char * name)487 sb1000_check_CRC(const int ioaddr[], const char* name)
488 {
489 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
490
491 unsigned char st[7];
492 int status;
493
494 /* check CRC */
495 if ((status = card_send_command(ioaddr, name, Command0, st)))
496 return status;
497 if (st[1] != st[3] || st[2] != st[4])
498 return -EIO;
499 return 0;
500 }
501
502 static inline int
sb1000_start_get_set_command(const int ioaddr[],const char * name)503 sb1000_start_get_set_command(const int ioaddr[], const char* name)
504 {
505 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
506
507 unsigned char st[7];
508
509 return card_send_command(ioaddr, name, Command0, st);
510 }
511
512 static int
sb1000_end_get_set_command(const int ioaddr[],const char * name)513 sb1000_end_get_set_command(const int ioaddr[], const char* name)
514 {
515 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
516 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
517
518 unsigned char st[7];
519 int status;
520
521 if ((status = card_send_command(ioaddr, name, Command0, st)))
522 return status;
523 return card_send_command(ioaddr, name, Command1, st);
524 }
525
526 static int
sb1000_activate(const int ioaddr[],const char * name)527 sb1000_activate(const int ioaddr[], const char* name)
528 {
529 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
530 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
531
532 unsigned char st[7];
533 int status;
534
535 ssleep(1);
536 status = card_send_command(ioaddr, name, Command0, st);
537 if (status)
538 return status;
539 status = card_send_command(ioaddr, name, Command1, st);
540 if (status)
541 return status;
542 if (st[3] != 0xf1) {
543 status = sb1000_start_get_set_command(ioaddr, name);
544 if (status)
545 return status;
546 return -EIO;
547 }
548 udelay(1000);
549 return sb1000_start_get_set_command(ioaddr, name);
550 }
551
552 /* get SB1000 firmware version */
553 static int
sb1000_get_firmware_version(const int ioaddr[],const char * name,unsigned char version[],int do_end)554 sb1000_get_firmware_version(const int ioaddr[], const char* name,
555 unsigned char version[], int do_end)
556 {
557 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
558
559 unsigned char st[7];
560 int status;
561
562 if ((status = sb1000_start_get_set_command(ioaddr, name)))
563 return status;
564 if ((status = card_send_command(ioaddr, name, Command0, st)))
565 return status;
566 if (st[0] != 0xa3)
567 return -EIO;
568 version[0] = st[1];
569 version[1] = st[2];
570 if (do_end)
571 return sb1000_end_get_set_command(ioaddr, name);
572 else
573 return 0;
574 }
575
576 /* get SB1000 frequency */
577 static int
sb1000_get_frequency(const int ioaddr[],const char * name,int * frequency)578 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
579 {
580 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
581
582 unsigned char st[7];
583 int status;
584
585 udelay(1000);
586 if ((status = sb1000_start_get_set_command(ioaddr, name)))
587 return status;
588 if ((status = card_send_command(ioaddr, name, Command0, st)))
589 return status;
590 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
591 return sb1000_end_get_set_command(ioaddr, name);
592 }
593
594 /* set SB1000 frequency */
595 static int
sb1000_set_frequency(const int ioaddr[],const char * name,int frequency)596 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
597 {
598 unsigned char st[7];
599 int status;
600 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
601
602 const int FrequencyLowerLimit = 57000;
603 const int FrequencyUpperLimit = 804000;
604
605 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
606 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
607 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
608 FrequencyUpperLimit);
609 return -EINVAL;
610 }
611 udelay(1000);
612 if ((status = sb1000_start_get_set_command(ioaddr, name)))
613 return status;
614 Command0[5] = frequency & 0xff;
615 frequency >>= 8;
616 Command0[4] = frequency & 0xff;
617 frequency >>= 8;
618 Command0[3] = frequency & 0xff;
619 frequency >>= 8;
620 Command0[2] = frequency & 0xff;
621 return card_send_command(ioaddr, name, Command0, st);
622 }
623
624 /* get SB1000 PIDs */
625 static int
sb1000_get_PIDs(const int ioaddr[],const char * name,short PID[])626 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
627 {
628 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
629 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
630 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
631 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
632
633 unsigned char st[7];
634 int status;
635
636 udelay(1000);
637 if ((status = sb1000_start_get_set_command(ioaddr, name)))
638 return status;
639
640 if ((status = card_send_command(ioaddr, name, Command0, st)))
641 return status;
642 PID[0] = st[1] << 8 | st[2];
643
644 if ((status = card_send_command(ioaddr, name, Command1, st)))
645 return status;
646 PID[1] = st[1] << 8 | st[2];
647
648 if ((status = card_send_command(ioaddr, name, Command2, st)))
649 return status;
650 PID[2] = st[1] << 8 | st[2];
651
652 if ((status = card_send_command(ioaddr, name, Command3, st)))
653 return status;
654 PID[3] = st[1] << 8 | st[2];
655
656 return sb1000_end_get_set_command(ioaddr, name);
657 }
658
659 /* set SB1000 PIDs */
660 static int
sb1000_set_PIDs(const int ioaddr[],const char * name,const short PID[])661 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
662 {
663 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
664
665 unsigned char st[7];
666 short p;
667 int status;
668 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
669 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
670 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
671 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
672
673 udelay(1000);
674 if ((status = sb1000_start_get_set_command(ioaddr, name)))
675 return status;
676
677 p = PID[0];
678 Command0[3] = p & 0xff;
679 p >>= 8;
680 Command0[2] = p & 0xff;
681 if ((status = card_send_command(ioaddr, name, Command0, st)))
682 return status;
683
684 p = PID[1];
685 Command1[3] = p & 0xff;
686 p >>= 8;
687 Command1[2] = p & 0xff;
688 if ((status = card_send_command(ioaddr, name, Command1, st)))
689 return status;
690
691 p = PID[2];
692 Command2[3] = p & 0xff;
693 p >>= 8;
694 Command2[2] = p & 0xff;
695 if ((status = card_send_command(ioaddr, name, Command2, st)))
696 return status;
697
698 p = PID[3];
699 Command3[3] = p & 0xff;
700 p >>= 8;
701 Command3[2] = p & 0xff;
702 if ((status = card_send_command(ioaddr, name, Command3, st)))
703 return status;
704
705 if ((status = card_send_command(ioaddr, name, Command4, st)))
706 return status;
707 return sb1000_end_get_set_command(ioaddr, name);
708 }
709
710
711 static void
sb1000_print_status_buffer(const char * name,unsigned char st[],unsigned char buffer[],int size)712 sb1000_print_status_buffer(const char* name, unsigned char st[],
713 unsigned char buffer[], int size)
714 {
715 int i, j, k;
716
717 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
718 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
719 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
720 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
721 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
722 buffer[46] << 8 | buffer[47],
723 buffer[42], buffer[43], buffer[44], buffer[45],
724 buffer[48] << 8 | buffer[49]);
725 } else {
726 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
727 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
728 for (j = 0; j < 8 && k < size; j++, k++)
729 printk(" %02x", buffer[k]);
730 printk("\n");
731 }
732 }
733 }
734
735 /*
736 * SB1000 commands for frame rx interrupt
737 */
738 /* receive a single frame and assemble datagram
739 * (this is the heart of the interrupt routine)
740 */
741 static int
sb1000_rx(struct net_device * dev)742 sb1000_rx(struct net_device *dev)
743 {
744
745 #define FRAMESIZE 184
746 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
747 short dlen;
748 int ioaddr, ns;
749 unsigned int skbsize;
750 struct sk_buff *skb;
751 struct sb1000_private *lp = netdev_priv(dev);
752 struct net_device_stats *stats = &dev->stats;
753
754 /* SB1000 frame constants */
755 const int FrameSize = FRAMESIZE;
756 const int NewDatagramHeaderSkip = 8;
757 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
758 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
759 const int ContDatagramHeaderSkip = 7;
760 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
761 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
762 const int TrailerSize = 4;
763
764 ioaddr = dev->base_addr;
765
766 insw(ioaddr, (unsigned short*) st, 1);
767 #ifdef XXXDEBUG
768 printk("cm0: received: %02x %02x\n", st[0], st[1]);
769 #endif /* XXXDEBUG */
770 lp->rx_frames++;
771
772 /* decide if it is a good or bad frame */
773 for (ns = 0; ns < NPIDS; ns++) {
774 session_id = lp->rx_session_id[ns];
775 frame_id = lp->rx_frame_id[ns];
776 if (st[0] == session_id) {
777 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
778 goto good_frame;
779 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
780 goto skipped_frame;
781 } else {
782 goto bad_frame;
783 }
784 } else if (st[0] == (session_id | 0x40)) {
785 if ((st[1] & 0xf0) == 0x30) {
786 goto skipped_frame;
787 } else {
788 goto bad_frame;
789 }
790 }
791 }
792 goto bad_frame;
793
794 skipped_frame:
795 stats->rx_frame_errors++;
796 skb = lp->rx_skb[ns];
797 if (sb1000_debug > 1)
798 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
799 "expecting %02x %02x\n", dev->name, st[0], st[1],
800 skb ? session_id : session_id | 0x40, frame_id);
801 if (skb) {
802 dev_kfree_skb(skb);
803 skb = NULL;
804 }
805
806 good_frame:
807 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
808 /* new datagram */
809 if (st[0] & 0x40) {
810 /* get data length */
811 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
812 #ifdef XXXDEBUG
813 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
814 #endif /* XXXDEBUG */
815 if (buffer[0] != NewDatagramHeaderSkip) {
816 if (sb1000_debug > 1)
817 printk(KERN_WARNING "%s: new datagram header skip error: "
818 "got %02x expecting %02x\n", dev->name, buffer[0],
819 NewDatagramHeaderSkip);
820 stats->rx_length_errors++;
821 insw(ioaddr, buffer, NewDatagramDataSize / 2);
822 goto bad_frame_next;
823 }
824 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
825 buffer[NewDatagramHeaderSkip + 4]) - 17;
826 if (dlen > SB1000_MRU) {
827 if (sb1000_debug > 1)
828 printk(KERN_WARNING "%s: datagram length (%d) greater "
829 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
830 stats->rx_length_errors++;
831 insw(ioaddr, buffer, NewDatagramDataSize / 2);
832 goto bad_frame_next;
833 }
834 lp->rx_dlen[ns] = dlen;
835 /* compute size to allocate for datagram */
836 skbsize = dlen + FrameSize;
837 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
838 if (sb1000_debug > 1)
839 printk(KERN_WARNING "%s: can't allocate %d bytes long "
840 "skbuff\n", dev->name, skbsize);
841 stats->rx_dropped++;
842 insw(ioaddr, buffer, NewDatagramDataSize / 2);
843 goto dropped_frame;
844 }
845 skb->dev = dev;
846 skb_reset_mac_header(skb);
847 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
848 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
849 NewDatagramDataSize / 2);
850 lp->rx_skb[ns] = skb;
851 } else {
852 /* continuation of previous datagram */
853 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
854 if (buffer[0] != ContDatagramHeaderSkip) {
855 if (sb1000_debug > 1)
856 printk(KERN_WARNING "%s: cont datagram header skip error: "
857 "got %02x expecting %02x\n", dev->name, buffer[0],
858 ContDatagramHeaderSkip);
859 stats->rx_length_errors++;
860 insw(ioaddr, buffer, ContDatagramDataSize / 2);
861 goto bad_frame_next;
862 }
863 skb = lp->rx_skb[ns];
864 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
865 ContDatagramDataSize / 2);
866 dlen = lp->rx_dlen[ns];
867 }
868 if (skb->len < dlen + TrailerSize) {
869 lp->rx_session_id[ns] &= ~0x40;
870 return 0;
871 }
872
873 /* datagram completed: send to upper level */
874 skb_trim(skb, dlen);
875 __netif_rx(skb);
876 stats->rx_bytes+=dlen;
877 stats->rx_packets++;
878 lp->rx_skb[ns] = NULL;
879 lp->rx_session_id[ns] |= 0x40;
880 return 0;
881
882 bad_frame:
883 insw(ioaddr, buffer, FrameSize / 2);
884 if (sb1000_debug > 1)
885 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
886 dev->name, st[0], st[1]);
887 stats->rx_frame_errors++;
888 bad_frame_next:
889 if (sb1000_debug > 2)
890 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
891 dropped_frame:
892 stats->rx_errors++;
893 if (ns < NPIDS) {
894 if ((skb = lp->rx_skb[ns])) {
895 dev_kfree_skb(skb);
896 lp->rx_skb[ns] = NULL;
897 }
898 lp->rx_session_id[ns] |= 0x40;
899 }
900 return -1;
901 }
902
903 static void
sb1000_error_dpc(struct net_device * dev)904 sb1000_error_dpc(struct net_device *dev)
905 {
906 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
907
908 char *name;
909 unsigned char st[5];
910 int ioaddr[2];
911 struct sb1000_private *lp = netdev_priv(dev);
912 const int ErrorDpcCounterInitialize = 200;
913
914 ioaddr[0] = dev->base_addr;
915 /* mem_start holds the second I/O address */
916 ioaddr[1] = dev->mem_start;
917 name = dev->name;
918
919 sb1000_wait_for_ready_clear(ioaddr, name);
920 sb1000_send_command(ioaddr, name, Command0);
921 sb1000_wait_for_ready(ioaddr, name);
922 sb1000_read_status(ioaddr, st);
923 if (st[1] & 0x10)
924 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
925 }
926
927
928 /*
929 * Linux interface functions
930 */
931 static int
sb1000_open(struct net_device * dev)932 sb1000_open(struct net_device *dev)
933 {
934 char *name;
935 int ioaddr[2], status;
936 struct sb1000_private *lp = netdev_priv(dev);
937 const unsigned short FirmwareVersion[] = {0x01, 0x01};
938
939 ioaddr[0] = dev->base_addr;
940 /* mem_start holds the second I/O address */
941 ioaddr[1] = dev->mem_start;
942 name = dev->name;
943
944 /* initialize sb1000 */
945 if ((status = sb1000_reset(ioaddr, name)))
946 return status;
947 ssleep(1);
948 if ((status = sb1000_check_CRC(ioaddr, name)))
949 return status;
950
951 /* initialize private data before board can catch interrupts */
952 lp->rx_skb[0] = NULL;
953 lp->rx_skb[1] = NULL;
954 lp->rx_skb[2] = NULL;
955 lp->rx_skb[3] = NULL;
956 lp->rx_dlen[0] = 0;
957 lp->rx_dlen[1] = 0;
958 lp->rx_dlen[2] = 0;
959 lp->rx_dlen[3] = 0;
960 lp->rx_frames = 0;
961 lp->rx_error_count = 0;
962 lp->rx_error_dpc_count = 0;
963 lp->rx_session_id[0] = 0x50;
964 lp->rx_session_id[1] = 0x48;
965 lp->rx_session_id[2] = 0x44;
966 lp->rx_session_id[3] = 0x42;
967 lp->rx_frame_id[0] = 0;
968 lp->rx_frame_id[1] = 0;
969 lp->rx_frame_id[2] = 0;
970 lp->rx_frame_id[3] = 0;
971 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) {
972 return -EAGAIN;
973 }
974
975 if (sb1000_debug > 2)
976 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
977
978 /* Activate board and check firmware version */
979 udelay(1000);
980 if ((status = sb1000_activate(ioaddr, name)))
981 return status;
982 udelay(0);
983 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
984 return status;
985 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
986 printk(KERN_WARNING "%s: found firmware version %x.%02x "
987 "(should be %x.%02x)\n", name, version[0], version[1],
988 FirmwareVersion[0], FirmwareVersion[1]);
989
990
991 netif_start_queue(dev);
992 return 0; /* Always succeed */
993 }
994
sb1000_siocdevprivate(struct net_device * dev,struct ifreq * ifr,void __user * data,int cmd)995 static int sb1000_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
996 void __user *data, int cmd)
997 {
998 char* name;
999 unsigned char version[2];
1000 short PID[4];
1001 int ioaddr[2], status, frequency;
1002 unsigned int stats[5];
1003 struct sb1000_private *lp = netdev_priv(dev);
1004
1005 if (!(dev && dev->flags & IFF_UP))
1006 return -ENODEV;
1007
1008 ioaddr[0] = dev->base_addr;
1009 /* mem_start holds the second I/O address */
1010 ioaddr[1] = dev->mem_start;
1011 name = dev->name;
1012
1013 switch (cmd) {
1014 case SIOCGCMSTATS: /* get statistics */
1015 stats[0] = dev->stats.rx_bytes;
1016 stats[1] = lp->rx_frames;
1017 stats[2] = dev->stats.rx_packets;
1018 stats[3] = dev->stats.rx_errors;
1019 stats[4] = dev->stats.rx_dropped;
1020 if (copy_to_user(data, stats, sizeof(stats)))
1021 return -EFAULT;
1022 status = 0;
1023 break;
1024
1025 case SIOCGCMFIRMWARE: /* get firmware version */
1026 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1027 return status;
1028 if (copy_to_user(data, version, sizeof(version)))
1029 return -EFAULT;
1030 break;
1031
1032 case SIOCGCMFREQUENCY: /* get frequency */
1033 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1034 return status;
1035 if (put_user(frequency, (int __user *)data))
1036 return -EFAULT;
1037 break;
1038
1039 case SIOCSCMFREQUENCY: /* set frequency */
1040 if (!capable(CAP_NET_ADMIN))
1041 return -EPERM;
1042 if (get_user(frequency, (int __user *)data))
1043 return -EFAULT;
1044 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1045 return status;
1046 break;
1047
1048 case SIOCGCMPIDS: /* get PIDs */
1049 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1050 return status;
1051 if (copy_to_user(data, PID, sizeof(PID)))
1052 return -EFAULT;
1053 break;
1054
1055 case SIOCSCMPIDS: /* set PIDs */
1056 if (!capable(CAP_NET_ADMIN))
1057 return -EPERM;
1058 if (copy_from_user(PID, data, sizeof(PID)))
1059 return -EFAULT;
1060 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1061 return status;
1062 /* set session_id, frame_id and pkt_type too */
1063 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1064 lp->rx_session_id[1] = 0x48;
1065 lp->rx_session_id[2] = 0x44;
1066 lp->rx_session_id[3] = 0x42;
1067 lp->rx_frame_id[0] = 0;
1068 lp->rx_frame_id[1] = 0;
1069 lp->rx_frame_id[2] = 0;
1070 lp->rx_frame_id[3] = 0;
1071 break;
1072
1073 default:
1074 status = -EINVAL;
1075 break;
1076 }
1077 return status;
1078 }
1079
1080 /* transmit function: do nothing since SB1000 can't send anything out */
1081 static netdev_tx_t
sb1000_start_xmit(struct sk_buff * skb,struct net_device * dev)1082 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1083 {
1084 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1085 /* sb1000 can't xmit datagrams */
1086 dev_kfree_skb(skb);
1087 return NETDEV_TX_OK;
1088 }
1089
1090 /* SB1000 interrupt handler. */
sb1000_interrupt(int irq,void * dev_id)1091 static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1092 {
1093 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1094 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1095
1096 char *name;
1097 unsigned char st;
1098 int ioaddr[2];
1099 struct net_device *dev = dev_id;
1100 struct sb1000_private *lp = netdev_priv(dev);
1101
1102 const int MaxRxErrorCount = 6;
1103
1104 ioaddr[0] = dev->base_addr;
1105 /* mem_start holds the second I/O address */
1106 ioaddr[1] = dev->mem_start;
1107 name = dev->name;
1108
1109 /* is it a good interrupt? */
1110 st = inb(ioaddr[1] + 6);
1111 if (!(st & 0x08 && st & 0x20)) {
1112 return IRQ_NONE;
1113 }
1114
1115 if (sb1000_debug > 3)
1116 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1117
1118 st = inb(ioaddr[0] + 7);
1119 if (sb1000_rx(dev))
1120 lp->rx_error_count++;
1121 #ifdef SB1000_DELAY
1122 udelay(SB1000_DELAY);
1123 #endif /* SB1000_DELAY */
1124 sb1000_issue_read_command(ioaddr, name);
1125 if (st & 0x01) {
1126 sb1000_error_dpc(dev);
1127 sb1000_issue_read_command(ioaddr, name);
1128 }
1129 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1130 sb1000_wait_for_ready_clear(ioaddr, name);
1131 sb1000_send_command(ioaddr, name, Command0);
1132 sb1000_wait_for_ready(ioaddr, name);
1133 sb1000_issue_read_command(ioaddr, name);
1134 }
1135 if (lp->rx_error_count >= MaxRxErrorCount) {
1136 sb1000_wait_for_ready_clear(ioaddr, name);
1137 sb1000_send_command(ioaddr, name, Command1);
1138 sb1000_wait_for_ready(ioaddr, name);
1139 sb1000_issue_read_command(ioaddr, name);
1140 lp->rx_error_count = 0;
1141 }
1142
1143 return IRQ_HANDLED;
1144 }
1145
sb1000_close(struct net_device * dev)1146 static int sb1000_close(struct net_device *dev)
1147 {
1148 int i;
1149 int ioaddr[2];
1150 struct sb1000_private *lp = netdev_priv(dev);
1151
1152 if (sb1000_debug > 2)
1153 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1154
1155 netif_stop_queue(dev);
1156
1157 ioaddr[0] = dev->base_addr;
1158 /* mem_start holds the second I/O address */
1159 ioaddr[1] = dev->mem_start;
1160
1161 free_irq(dev->irq, dev);
1162 /* If we don't do this, we can't re-insmod it later. */
1163 release_region(ioaddr[1], SB1000_IO_EXTENT);
1164 release_region(ioaddr[0], SB1000_IO_EXTENT);
1165
1166 /* free rx_skb's if needed */
1167 for (i=0; i<4; i++) {
1168 if (lp->rx_skb[i]) {
1169 dev_kfree_skb(lp->rx_skb[i]);
1170 }
1171 }
1172 return 0;
1173 }
1174
1175 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1176 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1177 MODULE_LICENSE("GPL");
1178
1179 module_pnp_driver(sb1000_driver);
1180