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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
31static 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
57static int sb1000_debug = SB1000_DEBUG;
58#else
59static const int sb1000_debug = 1;
60#endif
61
62static const int SB1000_IO_EXTENT = 8;
63/* SB1000 Maximum Receive Unit */
64static const int SB1000_MRU = 1500; /* octects */
65
66#define NPIDS 4
67struct 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 */
79extern int sb1000_probe(struct net_device *dev);
80static int sb1000_open(struct net_device *dev);
81static int sb1000_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
82 void __user *data, int cmd);
83static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
84 struct net_device *dev);
85static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
86static int sb1000_close(struct net_device *dev);
87
88
89/* SB1000 hardware routines to be used during open/configuration phases */
90static int card_wait_for_busy_clear(const int ioaddr[],
91 const char* name);
92static int card_wait_for_ready(const int ioaddr[], const char* name,
93 unsigned char in[]);
94static 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 */
98static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
99static int sb1000_wait_for_ready_clear(const int ioaddr[],
100 const char* name);
101static void sb1000_send_command(const int ioaddr[], const char* name,
102 const unsigned char out[]);
103static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
104static void sb1000_issue_read_command(const int ioaddr[],
105 const char* name);
106
107/* SB1000 commands for open/configuration */
108static int sb1000_reset(const int ioaddr[], const char* name);
109static int sb1000_check_CRC(const int ioaddr[], const char* name);
110static inline int sb1000_start_get_set_command(const int ioaddr[],
111 const char* name);
112static int sb1000_end_get_set_command(const int ioaddr[],
113 const char* name);
114static int sb1000_activate(const int ioaddr[], const char* name);
115static int sb1000_get_firmware_version(const int ioaddr[],
116 const char* name, unsigned char version[], int do_end);
117static int sb1000_get_frequency(const int ioaddr[], const char* name,
118 int* frequency);
119static int sb1000_set_frequency(const int ioaddr[], const char* name,
120 int frequency);
121static int sb1000_get_PIDs(const int ioaddr[], const char* name,
122 short PID[]);
123static int sb1000_set_PIDs(const int ioaddr[], const char* name,
124 const short PID[]);
125
126/* SB1000 commands for frame rx interrupt */
127static int sb1000_rx(struct net_device *dev);
128static void sb1000_error_dpc(struct net_device *dev);
129
130static const struct pnp_device_id sb1000_pnp_ids[] = {
131 { "GIC1000", 0 },
132 { "", 0 }
133};
134MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
135
136static 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
145static int
146sb1000_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
235static void
236sb1000_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
246static 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
258static const int TimeOutJiffies = (875 * HZ) / 100;
259
260/* Card Wait For Busy Clear (cannot be used during an interrupt) */
261static int
262card_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) */
285static int
286card_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) */
316static int
317card_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 */
360static const int Sb1000TimeOutJiffies = 7 * HZ;
361
362/* Card Wait For Ready (to be used during frame rx) */
363static int
364sb1000_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) */
389static int
390sb1000_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) */
414static void
415sb1000_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) */
430static void
431sb1000_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) */
441static void
442sb1000_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 */
456static int
457sb1000_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 */
486static int
487sb1000_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
502static inline int
503sb1000_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
512static int
513sb1000_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
526static int
527sb1000_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 */
553static int
554sb1000_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 */
577static int
578sb1000_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 */
595static int
596sb1000_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 */
625static int
626sb1000_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 */
660static int
661sb1000_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
711static void
712sb1000_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 */
741static int
742sb1000_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
768printk("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
794skipped_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
806good_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
813printk("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
882bad_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++;
888bad_frame_next:
889 if (sb1000_debug > 2)
890 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
891dropped_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
903static void
904sb1000_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 */
931static int
932sb1000_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
995static 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 */
1081static netdev_tx_t
1082sb1000_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. */
1091static 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
1146static 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
1175MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1176MODULE_DESCRIPTION("General Instruments SB1000 driver");
1177MODULE_LICENSE("GPL");
1178
1179module_pnp_driver(sb1000_driver);
1/* sb1000.c: A General Instruments SB1000 driver for linux. */
2/*
3 Written 1998 by Franco Venturi.
4
5 Copyright 1998 by Franco Venturi.
6 Copyright 1994,1995 by Donald Becker.
7 Copyright 1993 United States Government as represented by the
8 Director, National Security Agency.
9
10 This driver is for the General Instruments SB1000 (internal SURFboard)
11
12 The author may be reached as fventuri@mediaone.net
13
14 This program is free software; you can redistribute it
15 and/or modify it under the terms of the GNU General
16 Public License as published by the Free Software
17 Foundation; either version 2 of the License, or (at
18 your option) any later version.
19
20 Changes:
21
22 981115 Steven Hirsch <shirsch@adelphia.net>
23
24 Linus changed the timer interface. Should work on all recent
25 development kernels.
26
27 980608 Steven Hirsch <shirsch@adelphia.net>
28
29 Small changes to make it work with 2.1.x kernels. Hopefully,
30 nothing major will change before official release of Linux 2.2.
31
32 Merged with 2.2 - Alan Cox
33*/
34
35static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
36
37#include <linux/module.h>
38#include <linux/kernel.h>
39#include <linux/sched.h>
40#include <linux/string.h>
41#include <linux/interrupt.h>
42#include <linux/errno.h>
43#include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
44#include <linux/in.h>
45#include <linux/ioport.h>
46#include <linux/netdevice.h>
47#include <linux/if_arp.h>
48#include <linux/skbuff.h>
49#include <linux/delay.h> /* for udelay() */
50#include <linux/etherdevice.h>
51#include <linux/pnp.h>
52#include <linux/init.h>
53#include <linux/bitops.h>
54#include <linux/gfp.h>
55
56#include <asm/io.h>
57#include <asm/processor.h>
58#include <asm/uaccess.h>
59
60#ifdef SB1000_DEBUG
61static int sb1000_debug = SB1000_DEBUG;
62#else
63static const int sb1000_debug = 1;
64#endif
65
66static const int SB1000_IO_EXTENT = 8;
67/* SB1000 Maximum Receive Unit */
68static const int SB1000_MRU = 1500; /* octects */
69
70#define NPIDS 4
71struct sb1000_private {
72 struct sk_buff *rx_skb[NPIDS];
73 short rx_dlen[NPIDS];
74 unsigned int rx_frames;
75 short rx_error_count;
76 short rx_error_dpc_count;
77 unsigned char rx_session_id[NPIDS];
78 unsigned char rx_frame_id[NPIDS];
79 unsigned char rx_pkt_type[NPIDS];
80};
81
82/* prototypes for Linux interface */
83extern int sb1000_probe(struct net_device *dev);
84static int sb1000_open(struct net_device *dev);
85static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
86static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
87 struct net_device *dev);
88static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
89static int sb1000_close(struct net_device *dev);
90
91
92/* SB1000 hardware routines to be used during open/configuration phases */
93static int card_wait_for_busy_clear(const int ioaddr[],
94 const char* name);
95static int card_wait_for_ready(const int ioaddr[], const char* name,
96 unsigned char in[]);
97static int card_send_command(const int ioaddr[], const char* name,
98 const unsigned char out[], unsigned char in[]);
99
100/* SB1000 hardware routines to be used during frame rx interrupt */
101static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
102static int sb1000_wait_for_ready_clear(const int ioaddr[],
103 const char* name);
104static void sb1000_send_command(const int ioaddr[], const char* name,
105 const unsigned char out[]);
106static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
107static void sb1000_issue_read_command(const int ioaddr[],
108 const char* name);
109
110/* SB1000 commands for open/configuration */
111static int sb1000_reset(const int ioaddr[], const char* name);
112static int sb1000_check_CRC(const int ioaddr[], const char* name);
113static inline int sb1000_start_get_set_command(const int ioaddr[],
114 const char* name);
115static int sb1000_end_get_set_command(const int ioaddr[],
116 const char* name);
117static int sb1000_activate(const int ioaddr[], const char* name);
118static int sb1000_get_firmware_version(const int ioaddr[],
119 const char* name, unsigned char version[], int do_end);
120static int sb1000_get_frequency(const int ioaddr[], const char* name,
121 int* frequency);
122static int sb1000_set_frequency(const int ioaddr[], const char* name,
123 int frequency);
124static int sb1000_get_PIDs(const int ioaddr[], const char* name,
125 short PID[]);
126static int sb1000_set_PIDs(const int ioaddr[], const char* name,
127 const short PID[]);
128
129/* SB1000 commands for frame rx interrupt */
130static int sb1000_rx(struct net_device *dev);
131static void sb1000_error_dpc(struct net_device *dev);
132
133static const struct pnp_device_id sb1000_pnp_ids[] = {
134 { "GIC1000", 0 },
135 { "", 0 }
136};
137MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
138
139static const struct net_device_ops sb1000_netdev_ops = {
140 .ndo_open = sb1000_open,
141 .ndo_start_xmit = sb1000_start_xmit,
142 .ndo_do_ioctl = sb1000_dev_ioctl,
143 .ndo_stop = sb1000_close,
144 .ndo_change_mtu = eth_change_mtu,
145 .ndo_set_mac_address = eth_mac_addr,
146 .ndo_validate_addr = eth_validate_addr,
147};
148
149static int
150sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
151{
152 struct net_device *dev;
153 unsigned short ioaddr[2], irq;
154 unsigned int serial_number;
155 int error = -ENODEV;
156
157 if (pnp_device_attach(pdev) < 0)
158 return -ENODEV;
159 if (pnp_activate_dev(pdev) < 0)
160 goto out_detach;
161
162 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
163 goto out_disable;
164 if (!pnp_irq_valid(pdev, 0))
165 goto out_disable;
166
167 serial_number = pdev->card->serial;
168
169 ioaddr[0] = pnp_port_start(pdev, 0);
170 ioaddr[1] = pnp_port_start(pdev, 0);
171
172 irq = pnp_irq(pdev, 0);
173
174 if (!request_region(ioaddr[0], 16, "sb1000"))
175 goto out_disable;
176 if (!request_region(ioaddr[1], 16, "sb1000"))
177 goto out_release_region0;
178
179 dev = alloc_etherdev(sizeof(struct sb1000_private));
180 if (!dev) {
181 error = -ENOMEM;
182 goto out_release_regions;
183 }
184
185
186 dev->base_addr = ioaddr[0];
187 /* mem_start holds the second I/O address */
188 dev->mem_start = ioaddr[1];
189 dev->irq = irq;
190
191 if (sb1000_debug > 0)
192 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
193 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
194 dev->mem_start, serial_number, dev->irq);
195
196 /*
197 * The SB1000 is an rx-only cable modem device. The uplink is a modem
198 * and we do not want to arp on it.
199 */
200 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
201
202 SET_NETDEV_DEV(dev, &pdev->dev);
203
204 if (sb1000_debug > 0)
205 printk(KERN_NOTICE "%s", version);
206
207 dev->netdev_ops = &sb1000_netdev_ops;
208
209 /* hardware address is 0:0:serial_number */
210 dev->dev_addr[2] = serial_number >> 24 & 0xff;
211 dev->dev_addr[3] = serial_number >> 16 & 0xff;
212 dev->dev_addr[4] = serial_number >> 8 & 0xff;
213 dev->dev_addr[5] = serial_number >> 0 & 0xff;
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
235static void
236sb1000_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
246static 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
258static const int TimeOutJiffies = (875 * HZ) / 100;
259
260/* Card Wait For Busy Clear (cannot be used during an interrupt) */
261static int
262card_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) */
285static int
286card_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) */
316static int
317card_send_command(const int ioaddr[], const char* name,
318 const unsigned char out[], unsigned char in[])
319{
320 int status, x;
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 x = (out[2] == 0x02);
351 } else {
352 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
353 return -EIO;
354 }
355 return 0;
356}
357
358
359/*
360 * SB1000 hardware routines to be used during frame rx interrupt
361 */
362static const int Sb1000TimeOutJiffies = 7 * HZ;
363
364/* Card Wait For Ready (to be used during frame rx) */
365static int
366sb1000_wait_for_ready(const int ioaddr[], const char* name)
367{
368 unsigned long timeout;
369
370 timeout = jiffies + Sb1000TimeOutJiffies;
371 while (inb(ioaddr[1] + 6) & 0x80) {
372 if (time_after_eq(jiffies, timeout)) {
373 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
374 name);
375 return -ETIME;
376 }
377 }
378 timeout = jiffies + Sb1000TimeOutJiffies;
379 while (!(inb(ioaddr[1] + 6) & 0x40)) {
380 if (time_after_eq(jiffies, timeout)) {
381 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
382 name);
383 return -ETIME;
384 }
385 }
386 inb(ioaddr[0] + 7);
387 return 0;
388}
389
390/* Card Wait For Ready Clear (to be used during frame rx) */
391static int
392sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
393{
394 unsigned long timeout;
395
396 timeout = jiffies + Sb1000TimeOutJiffies;
397 while (inb(ioaddr[1] + 6) & 0x80) {
398 if (time_after_eq(jiffies, timeout)) {
399 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
400 name);
401 return -ETIME;
402 }
403 }
404 timeout = jiffies + Sb1000TimeOutJiffies;
405 while (inb(ioaddr[1] + 6) & 0x40) {
406 if (time_after_eq(jiffies, timeout)) {
407 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
408 name);
409 return -ETIME;
410 }
411 }
412 return 0;
413}
414
415/* Card Send Command (to be used during frame rx) */
416static void
417sb1000_send_command(const int ioaddr[], const char* name,
418 const unsigned char out[])
419{
420 outb(out[2], ioaddr[0] + 1);
421 outb(out[3], ioaddr[0] + 2);
422 outb(out[4], ioaddr[0] + 3);
423 outb(out[5], ioaddr[0] + 4);
424 outb(out[1], ioaddr[0] + 5);
425 outb(out[0], ioaddr[0] + 7);
426 if (sb1000_debug > 3)
427 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
428 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
429}
430
431/* Card Read Status (to be used during frame rx) */
432static void
433sb1000_read_status(const int ioaddr[], unsigned char in[])
434{
435 in[1] = inb(ioaddr[0] + 1);
436 in[2] = inb(ioaddr[0] + 2);
437 in[3] = inb(ioaddr[0] + 3);
438 in[4] = inb(ioaddr[0] + 4);
439 in[0] = inb(ioaddr[0] + 5);
440}
441
442/* Issue Read Command (to be used during frame rx) */
443static void
444sb1000_issue_read_command(const int ioaddr[], const char* name)
445{
446 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
447
448 sb1000_wait_for_ready_clear(ioaddr, name);
449 outb(0xa0, ioaddr[0] + 6);
450 sb1000_send_command(ioaddr, name, Command0);
451}
452
453
454/*
455 * SB1000 commands for open/configuration
456 */
457/* reset SB1000 card */
458static int
459sb1000_reset(const int ioaddr[], const char* name)
460{
461 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
462
463 unsigned char st[7];
464 int port, status;
465
466 port = ioaddr[1] + 6;
467 outb(0x4, port);
468 inb(port);
469 udelay(1000);
470 outb(0x0, port);
471 inb(port);
472 ssleep(1);
473 outb(0x4, port);
474 inb(port);
475 udelay(1000);
476 outb(0x0, port);
477 inb(port);
478 udelay(0);
479
480 if ((status = card_send_command(ioaddr, name, Command0, st)))
481 return status;
482 if (st[3] != 0xf0)
483 return -EIO;
484 return 0;
485}
486
487/* check SB1000 firmware CRC */
488static int
489sb1000_check_CRC(const int ioaddr[], const char* name)
490{
491 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
492
493 unsigned char st[7];
494 int crc, status;
495
496 /* check CRC */
497 if ((status = card_send_command(ioaddr, name, Command0, st)))
498 return status;
499 if (st[1] != st[3] || st[2] != st[4])
500 return -EIO;
501 crc = st[1] << 8 | st[2];
502 return 0;
503}
504
505static inline int
506sb1000_start_get_set_command(const int ioaddr[], const char* name)
507{
508 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
509
510 unsigned char st[7];
511
512 return card_send_command(ioaddr, name, Command0, st);
513}
514
515static int
516sb1000_end_get_set_command(const int ioaddr[], const char* name)
517{
518 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
519 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
520
521 unsigned char st[7];
522 int status;
523
524 if ((status = card_send_command(ioaddr, name, Command0, st)))
525 return status;
526 return card_send_command(ioaddr, name, Command1, st);
527}
528
529static int
530sb1000_activate(const int ioaddr[], const char* name)
531{
532 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
533 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
534
535 unsigned char st[7];
536 int status;
537
538 ssleep(1);
539 if ((status = card_send_command(ioaddr, name, Command0, st)))
540 return status;
541 if ((status = card_send_command(ioaddr, name, Command1, st)))
542 return status;
543 if (st[3] != 0xf1) {
544 if ((status = sb1000_start_get_set_command(ioaddr, name)))
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 */
553static int
554sb1000_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 */
577static int
578sb1000_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 */
595static int
596sb1000_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 */
625static int
626sb1000_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 */
660static int
661sb1000_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
711static void
712sb1000_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 */
741static int
742sb1000_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
768printk("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
794skipped_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
806good_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
813printk("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
882bad_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++;
888bad_frame_next:
889 if (sb1000_debug > 2)
890 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
891dropped_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
903static void
904sb1000_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 */
931static int
932sb1000_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
995static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
996{
997 char* name;
998 unsigned char version[2];
999 short PID[4];
1000 int ioaddr[2], status, frequency;
1001 unsigned int stats[5];
1002 struct sb1000_private *lp = netdev_priv(dev);
1003
1004 if (!(dev && dev->flags & IFF_UP))
1005 return -ENODEV;
1006
1007 ioaddr[0] = dev->base_addr;
1008 /* mem_start holds the second I/O address */
1009 ioaddr[1] = dev->mem_start;
1010 name = dev->name;
1011
1012 switch (cmd) {
1013 case SIOCGCMSTATS: /* get statistics */
1014 stats[0] = dev->stats.rx_bytes;
1015 stats[1] = lp->rx_frames;
1016 stats[2] = dev->stats.rx_packets;
1017 stats[3] = dev->stats.rx_errors;
1018 stats[4] = dev->stats.rx_dropped;
1019 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1020 return -EFAULT;
1021 status = 0;
1022 break;
1023
1024 case SIOCGCMFIRMWARE: /* get firmware version */
1025 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1026 return status;
1027 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1028 return -EFAULT;
1029 break;
1030
1031 case SIOCGCMFREQUENCY: /* get frequency */
1032 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1033 return status;
1034 if(put_user(frequency, (int __user *) ifr->ifr_data))
1035 return -EFAULT;
1036 break;
1037
1038 case SIOCSCMFREQUENCY: /* set frequency */
1039 if (!capable(CAP_NET_ADMIN))
1040 return -EPERM;
1041 if(get_user(frequency, (int __user *) ifr->ifr_data))
1042 return -EFAULT;
1043 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1044 return status;
1045 break;
1046
1047 case SIOCGCMPIDS: /* get PIDs */
1048 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1049 return status;
1050 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1051 return -EFAULT;
1052 break;
1053
1054 case SIOCSCMPIDS: /* set PIDs */
1055 if (!capable(CAP_NET_ADMIN))
1056 return -EPERM;
1057 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1058 return -EFAULT;
1059 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1060 return status;
1061 /* set session_id, frame_id and pkt_type too */
1062 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1063 lp->rx_session_id[1] = 0x48;
1064 lp->rx_session_id[2] = 0x44;
1065 lp->rx_session_id[3] = 0x42;
1066 lp->rx_frame_id[0] = 0;
1067 lp->rx_frame_id[1] = 0;
1068 lp->rx_frame_id[2] = 0;
1069 lp->rx_frame_id[3] = 0;
1070 break;
1071
1072 default:
1073 status = -EINVAL;
1074 break;
1075 }
1076 return status;
1077}
1078
1079/* transmit function: do nothing since SB1000 can't send anything out */
1080static netdev_tx_t
1081sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1082{
1083 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1084 /* sb1000 can't xmit datagrams */
1085 dev_kfree_skb(skb);
1086 return NETDEV_TX_OK;
1087}
1088
1089/* SB1000 interrupt handler. */
1090static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1091{
1092 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1093 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1094
1095 char *name;
1096 unsigned char st;
1097 int ioaddr[2];
1098 struct net_device *dev = dev_id;
1099 struct sb1000_private *lp = netdev_priv(dev);
1100
1101 const int MaxRxErrorCount = 6;
1102
1103 ioaddr[0] = dev->base_addr;
1104 /* mem_start holds the second I/O address */
1105 ioaddr[1] = dev->mem_start;
1106 name = dev->name;
1107
1108 /* is it a good interrupt? */
1109 st = inb(ioaddr[1] + 6);
1110 if (!(st & 0x08 && st & 0x20)) {
1111 return IRQ_NONE;
1112 }
1113
1114 if (sb1000_debug > 3)
1115 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1116
1117 st = inb(ioaddr[0] + 7);
1118 if (sb1000_rx(dev))
1119 lp->rx_error_count++;
1120#ifdef SB1000_DELAY
1121 udelay(SB1000_DELAY);
1122#endif /* SB1000_DELAY */
1123 sb1000_issue_read_command(ioaddr, name);
1124 if (st & 0x01) {
1125 sb1000_error_dpc(dev);
1126 sb1000_issue_read_command(ioaddr, name);
1127 }
1128 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1129 sb1000_wait_for_ready_clear(ioaddr, name);
1130 sb1000_send_command(ioaddr, name, Command0);
1131 sb1000_wait_for_ready(ioaddr, name);
1132 sb1000_issue_read_command(ioaddr, name);
1133 }
1134 if (lp->rx_error_count >= MaxRxErrorCount) {
1135 sb1000_wait_for_ready_clear(ioaddr, name);
1136 sb1000_send_command(ioaddr, name, Command1);
1137 sb1000_wait_for_ready(ioaddr, name);
1138 sb1000_issue_read_command(ioaddr, name);
1139 lp->rx_error_count = 0;
1140 }
1141
1142 return IRQ_HANDLED;
1143}
1144
1145static int sb1000_close(struct net_device *dev)
1146{
1147 int i;
1148 int ioaddr[2];
1149 struct sb1000_private *lp = netdev_priv(dev);
1150
1151 if (sb1000_debug > 2)
1152 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1153
1154 netif_stop_queue(dev);
1155
1156 ioaddr[0] = dev->base_addr;
1157 /* mem_start holds the second I/O address */
1158 ioaddr[1] = dev->mem_start;
1159
1160 free_irq(dev->irq, dev);
1161 /* If we don't do this, we can't re-insmod it later. */
1162 release_region(ioaddr[1], SB1000_IO_EXTENT);
1163 release_region(ioaddr[0], SB1000_IO_EXTENT);
1164
1165 /* free rx_skb's if needed */
1166 for (i=0; i<4; i++) {
1167 if (lp->rx_skb[i]) {
1168 dev_kfree_skb(lp->rx_skb[i]);
1169 }
1170 }
1171 return 0;
1172}
1173
1174MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1175MODULE_DESCRIPTION("General Instruments SB1000 driver");
1176MODULE_LICENSE("GPL");
1177
1178static int __init
1179sb1000_init(void)
1180{
1181 return pnp_register_driver(&sb1000_driver);
1182}
1183
1184static void __exit
1185sb1000_exit(void)
1186{
1187 pnp_unregister_driver(&sb1000_driver);
1188}
1189
1190module_init(sb1000_init);
1191module_exit(sb1000_exit);