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Massive net driver const-ification.
[net-next-2.6.git] / drivers / net / sb1000.c
CommitLineData
1da177e4
LT		 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/string.h>
40#include <linux/interrupt.h>
41#include <linux/errno.h>
42#include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
43#include <linux/in.h>
44#include <linux/slab.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
55#include <asm/io.h>
56#include <asm/processor.h>
57#include <asm/uaccess.h>
58
59#ifdef SB1000_DEBUG
60static int sb1000_debug = SB1000_DEBUG;
61#else
f71e1309 62static const int sb1000_debug = 1;
1da177e4
LT		 63#endif
64
65static const int SB1000_IO_EXTENT = 8;
66/* SB1000 Maximum Receive Unit */
67static const int SB1000_MRU = 1500; /* octects */
68
69#define NPIDS 4
70struct sb1000_private {
71 struct sk_buff *rx_skb[NPIDS];
72 short rx_dlen[NPIDS];
73 unsigned int rx_frames;
74 short rx_error_count;
75 short rx_error_dpc_count;
76 unsigned char rx_session_id[NPIDS];
77 unsigned char rx_frame_id[NPIDS];
78 unsigned char rx_pkt_type[NPIDS];
79 struct net_device_stats stats;
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 int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
87static irqreturn_t sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs);
88static struct net_device_stats *sb1000_stats(struct net_device *dev);
89static int sb1000_close(struct net_device *dev);
90
91
92/* SB1000 hardware routines to be used during open/configuration phases */
1da177e4
LT		 93static inline int card_wait_for_busy_clear(const int ioaddr[],
94 const char* name);
95static inline int card_wait_for_ready(const int ioaddr[], const char* name,
96 unsigned char in[]);
858119e1 97static int card_send_command(const int ioaddr[], const char* name,
1da177e4
LT		 98 const unsigned char out[], unsigned char in[]);
99
100/* SB1000 hardware routines to be used during frame rx interrupt */
101static inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
102static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
103 const char* name);
104static inline void sb1000_send_command(const int ioaddr[], const char* name,
105 const unsigned char out[]);
106static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
107static inline void sb1000_issue_read_command(const int ioaddr[],
108 const char* name);
109
110/* SB1000 commands for open/configuration */
111static inline int sb1000_reset(const int ioaddr[], const char* name);
112static inline 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 inline int sb1000_end_get_set_command(const int ioaddr[],
116 const char* name);
117static inline 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 inline int sb1000_rx(struct net_device *dev);
131static inline 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 int
140sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
141{
142 struct net_device *dev;
143 unsigned short ioaddr[2], irq;
144 unsigned int serial_number;
145 int error = -ENODEV;
146
147 if (pnp_device_attach(pdev) < 0)
148 return -ENODEV;
149 if (pnp_activate_dev(pdev) < 0)
150 goto out_detach;
151
152 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
153 goto out_disable;
154 if (!pnp_irq_valid(pdev, 0))
155 goto out_disable;
156
157 serial_number = pdev->card->serial;
158
159 ioaddr[0] = pnp_port_start(pdev, 0);
160 ioaddr[1] = pnp_port_start(pdev, 0);
161
162 irq = pnp_irq(pdev, 0);
163
164 if (!request_region(ioaddr[0], 16, "sb1000"))
165 goto out_disable;
166 if (!request_region(ioaddr[1], 16, "sb1000"))
167 goto out_release_region0;
168
169 dev = alloc_etherdev(sizeof(struct sb1000_private));
170 if (!dev) {
171 error = -ENOMEM;
172 goto out_release_regions;
173 }
174
175
176 dev->base_addr = ioaddr[0];
177 /* mem_start holds the second I/O address */
178 dev->mem_start = ioaddr[1];
179 dev->irq = irq;
180
181 if (sb1000_debug > 0)
182 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
183 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
184 dev->mem_start, serial_number, dev->irq);
185
186 /*
187 * The SB1000 is an rx-only cable modem device. The uplink is a modem
188 * and we do not want to arp on it.
189 */
190 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
191
192 SET_MODULE_OWNER(dev);
193 SET_NETDEV_DEV(dev, &pdev->dev);
194
195 if (sb1000_debug > 0)
196 printk(KERN_NOTICE "%s", version);
197
198 /* The SB1000-specific entries in the device structure. */
199 dev->open = sb1000_open;
200 dev->do_ioctl = sb1000_dev_ioctl;
201 dev->hard_start_xmit = sb1000_start_xmit;
202 dev->stop = sb1000_close;
203 dev->get_stats = sb1000_stats;
204
205 /* hardware address is 0:0:serial_number */
206 dev->dev_addr[2] = serial_number >> 24 & 0xff;
207 dev->dev_addr[3] = serial_number >> 16 & 0xff;
208 dev->dev_addr[4] = serial_number >> 8 & 0xff;
209 dev->dev_addr[5] = serial_number >> 0 & 0xff;
210
211 pnp_set_drvdata(pdev, dev);
212
213 error = register_netdev(dev);
214 if (error)
215 goto out_free_netdev;
216 return 0;
217
218 out_free_netdev:
219 free_netdev(dev);
220 out_release_regions:
221 release_region(ioaddr[1], 16);
222 out_release_region0:
223 release_region(ioaddr[0], 16);
224 out_disable:
225 pnp_disable_dev(pdev);
226 out_detach:
227 pnp_device_detach(pdev);
228 return error;
229}
230
231static void
232sb1000_remove_one(struct pnp_dev *pdev)
233{
234 struct net_device *dev = pnp_get_drvdata(pdev);
235
236 unregister_netdev(dev);
237 release_region(dev->base_addr, 16);
238 release_region(dev->mem_start, 16);
239 free_netdev(dev);
240}
241
242static struct pnp_driver sb1000_driver = {
243 .name = "sb1000",
244 .id_table = sb1000_pnp_ids,
245 .probe = sb1000_probe_one,
246 .remove = sb1000_remove_one,
247};
248
249\f
250/*
251 * SB1000 hardware routines to be used during open/configuration phases
252 */
253
254static const int TimeOutJiffies = (875 * HZ) / 100;
255
1da177e4
LT		 256/* Card Wait For Busy Clear (cannot be used during an interrupt) */
257static inline int
258card_wait_for_busy_clear(const int ioaddr[], const char* name)
259{
260 unsigned char a;
261 unsigned long timeout;
262
263 a = inb(ioaddr[0] + 7);
264 timeout = jiffies + TimeOutJiffies;
265 while (a & 0x80 || a & 0x40) {
266 /* a little sleep */
267 yield();
268
269 a = inb(ioaddr[0] + 7);
270 if (time_after_eq(jiffies, timeout)) {
271 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
272 name);
273 return -ETIME;
274 }
275 }
276
277 return 0;
278}
279
280/* Card Wait For Ready (cannot be used during an interrupt) */
281static inline int
282card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
283{
284 unsigned char a;
285 unsigned long timeout;
286
287 a = inb(ioaddr[1] + 6);
288 timeout = jiffies + TimeOutJiffies;
289 while (a & 0x80 || !(a & 0x40)) {
290 /* a little sleep */
291 yield();
292
293 a = inb(ioaddr[1] + 6);
294 if (time_after_eq(jiffies, timeout)) {
295 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
296 name);
297 return -ETIME;
298 }
299 }
300
301 in[1] = inb(ioaddr[0] + 1);
302 in[2] = inb(ioaddr[0] + 2);
303 in[3] = inb(ioaddr[0] + 3);
304 in[4] = inb(ioaddr[0] + 4);
305 in[0] = inb(ioaddr[0] + 5);
306 in[6] = inb(ioaddr[0] + 6);
307 in[5] = inb(ioaddr[1] + 6);
308 return 0;
309}
310
311/* Card Send Command (cannot be used during an interrupt) */
858119e1 312static int
1da177e4
LT		 313card_send_command(const int ioaddr[], const char* name,
314 const unsigned char out[], unsigned char in[])
315{
316 int status, x;
317
318 if ((status = card_wait_for_busy_clear(ioaddr, name)))
319 return status;
320 outb(0xa0, ioaddr[0] + 6);
321 outb(out[2], ioaddr[0] + 1);
322 outb(out[3], ioaddr[0] + 2);
323 outb(out[4], ioaddr[0] + 3);
324 outb(out[5], ioaddr[0] + 4);
325 outb(out[1], ioaddr[0] + 5);
326 outb(0xa0, ioaddr[0] + 6);
327 outb(out[0], ioaddr[0] + 7);
328 if (out[0] != 0x20 && out[0] != 0x30) {
329 if ((status = card_wait_for_ready(ioaddr, name, in)))
330 return status;
331 inb(ioaddr[0] + 7);
332 if (sb1000_debug > 3)
333 printk(KERN_DEBUG "%s: card_send_command "
334 "out: %02x%02x%02x%02x%02x%02x "
335 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
336 out[0], out[1], out[2], out[3], out[4], out[5],
337 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
338 } else {
339 if (sb1000_debug > 3)
340 printk(KERN_DEBUG "%s: card_send_command "
341 "out: %02x%02x%02x%02x%02x%02x\n", name,
342 out[0], out[1], out[2], out[3], out[4], out[5]);
343 }
344
345 if (out[1] == 0x1b) {
346 x = (out[2] == 0x02);
347 } else {
348 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
349 return -EIO;
350 }
351 return 0;
352}
353
354\f
355/*
356 * SB1000 hardware routines to be used during frame rx interrupt
357 */
358static const int Sb1000TimeOutJiffies = 7 * HZ;
359
360/* Card Wait For Ready (to be used during frame rx) */
361static inline int
362sb1000_wait_for_ready(const int ioaddr[], const char* name)
363{
364 unsigned long timeout;
365
366 timeout = jiffies + Sb1000TimeOutJiffies;
367 while (inb(ioaddr[1] + 6) & 0x80) {
368 if (time_after_eq(jiffies, timeout)) {
369 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
370 name);
371 return -ETIME;
372 }
373 }
374 timeout = jiffies + Sb1000TimeOutJiffies;
375 while (!(inb(ioaddr[1] + 6) & 0x40)) {
376 if (time_after_eq(jiffies, timeout)) {
377 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
378 name);
379 return -ETIME;
380 }
381 }
382 inb(ioaddr[0] + 7);
383 return 0;
384}
385
386/* Card Wait For Ready Clear (to be used during frame rx) */
387static inline int
388sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
389{
390 unsigned long timeout;
391
392 timeout = jiffies + Sb1000TimeOutJiffies;
393 while (inb(ioaddr[1] + 6) & 0x80) {
394 if (time_after_eq(jiffies, timeout)) {
395 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
396 name);
397 return -ETIME;
398 }
399 }
400 timeout = jiffies + Sb1000TimeOutJiffies;
401 while (inb(ioaddr[1] + 6) & 0x40) {
402 if (time_after_eq(jiffies, timeout)) {
403 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
404 name);
405 return -ETIME;
406 }
407 }
408 return 0;
409}
410
411/* Card Send Command (to be used during frame rx) */
412static inline void
413sb1000_send_command(const int ioaddr[], const char* name,
414 const unsigned char out[])
415{
416 outb(out[2], ioaddr[0] + 1);
417 outb(out[3], ioaddr[0] + 2);
418 outb(out[4], ioaddr[0] + 3);
419 outb(out[5], ioaddr[0] + 4);
420 outb(out[1], ioaddr[0] + 5);
421 outb(out[0], ioaddr[0] + 7);
422 if (sb1000_debug > 3)
423 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
424 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
425 return;
426}
427
428/* Card Read Status (to be used during frame rx) */
429static inline void
430sb1000_read_status(const int ioaddr[], unsigned char in[])
431{
432 in[1] = inb(ioaddr[0] + 1);
433 in[2] = inb(ioaddr[0] + 2);
434 in[3] = inb(ioaddr[0] + 3);
435 in[4] = inb(ioaddr[0] + 4);
436 in[0] = inb(ioaddr[0] + 5);
437 return;
438}
439
440/* Issue Read Command (to be used during frame rx) */
441static inline void
442sb1000_issue_read_command(const int ioaddr[], const char* name)
443{
444 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 return;
450}
451
452\f
453/*
454 * SB1000 commands for open/configuration
455 */
456/* reset SB1000 card */
457static inline int
458sb1000_reset(const int ioaddr[], const char* name)
459{
460 unsigned char st[7];
461 int port, status;
462 const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
463
464 port = ioaddr[1] + 6;
465 outb(0x4, port);
466 inb(port);
467 udelay(1000);
468 outb(0x0, port);
469 inb(port);
a26c074c 470 ssleep(1);
1da177e4
LT		 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 inline int
487sb1000_check_CRC(const int ioaddr[], const char* name)
488{
489 unsigned char st[7];
490 int crc, status;
491 const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
492
493 /* check CRC */
494 if ((status = card_send_command(ioaddr, name, Command0, st)))
495 return status;
496 if (st[1] != st[3] || st[2] != st[4])
497 return -EIO;
498 crc = st[1] << 8 | st[2];
499 return 0;
500}
501
502static inline int
503sb1000_start_get_set_command(const int ioaddr[], const char* name)
504{
505 unsigned char st[7];
506 const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
507
508 return card_send_command(ioaddr, name, Command0, st);
509}
510
511static inline int
512sb1000_end_get_set_command(const int ioaddr[], const char* name)
513{
514 unsigned char st[7];
515 int status;
516 const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
517 const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
518
519 if ((status = card_send_command(ioaddr, name, Command0, st)))
520 return status;
521 return card_send_command(ioaddr, name, Command1, st);
522}
523
524static inline int
525sb1000_activate(const int ioaddr[], const char* name)
526{
527 unsigned char st[7];
528 int status;
529 const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
530 const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
531
a26c074c 532 ssleep(1);
1da177e4
LT		 533 if ((status = card_send_command(ioaddr, name, Command0, st)))
534 return status;
535 if ((status = card_send_command(ioaddr, name, Command1, st)))
536 return status;
537 if (st[3] != 0xf1) {
538 if ((status = sb1000_start_get_set_command(ioaddr, name)))
539 return status;
540 return -EIO;
541 }
542 udelay(1000);
543 return sb1000_start_get_set_command(ioaddr, name);
544}
545
546/* get SB1000 firmware version */
547static int
548sb1000_get_firmware_version(const int ioaddr[], const char* name,
549 unsigned char version[], int do_end)
550{
551 unsigned char st[7];
552 int status;
553 const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
554
555 if ((status = sb1000_start_get_set_command(ioaddr, name)))
556 return status;
557 if ((status = card_send_command(ioaddr, name, Command0, st)))
558 return status;
559 if (st[0] != 0xa3)
560 return -EIO;
561 version[0] = st[1];
562 version[1] = st[2];
563 if (do_end)
564 return sb1000_end_get_set_command(ioaddr, name);
565 else
566 return 0;
567}
568
569/* get SB1000 frequency */
570static int
571sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
572{
573 unsigned char st[7];
574 int status;
575 const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
576
577 udelay(1000);
578 if ((status = sb1000_start_get_set_command(ioaddr, name)))
579 return status;
580 if ((status = card_send_command(ioaddr, name, Command0, st)))
581 return status;
582 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
583 return sb1000_end_get_set_command(ioaddr, name);
584}
585
586/* set SB1000 frequency */
587static int
588sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
589{
590 unsigned char st[7];
591 int status;
592 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
593
594 const int FrequencyLowerLimit = 57000;
595 const int FrequencyUpperLimit = 804000;
596
597 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
598 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
599 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
600 FrequencyUpperLimit);
601 return -EINVAL;
602 }
603 udelay(1000);
604 if ((status = sb1000_start_get_set_command(ioaddr, name)))
605 return status;
606 Command0[5] = frequency & 0xff;
607 frequency >>= 8;
608 Command0[4] = frequency & 0xff;
609 frequency >>= 8;
610 Command0[3] = frequency & 0xff;
611 frequency >>= 8;
612 Command0[2] = frequency & 0xff;
613 return card_send_command(ioaddr, name, Command0, st);
614}
615
616/* get SB1000 PIDs */
617static int
618sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
619{
620 unsigned char st[7];
621 int status;
622 const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
623 const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
624 const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
625 const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
626
627 udelay(1000);
628 if ((status = sb1000_start_get_set_command(ioaddr, name)))
629 return status;
630
631 if ((status = card_send_command(ioaddr, name, Command0, st)))
632 return status;
633 PID[0] = st[1] << 8 | st[2];
634
635 if ((status = card_send_command(ioaddr, name, Command1, st)))
636 return status;
637 PID[1] = st[1] << 8 | st[2];
638
639 if ((status = card_send_command(ioaddr, name, Command2, st)))
640 return status;
641 PID[2] = st[1] << 8 | st[2];
642
643 if ((status = card_send_command(ioaddr, name, Command3, st)))
644 return status;
645 PID[3] = st[1] << 8 | st[2];
646
647 return sb1000_end_get_set_command(ioaddr, name);
648}
649
650/* set SB1000 PIDs */
651static int
652sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
653{
654 unsigned char st[7];
655 short p;
656 int status;
657 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
658 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
659 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
660 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
661 const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
662
663 udelay(1000);
664 if ((status = sb1000_start_get_set_command(ioaddr, name)))
665 return status;
666
667 p = PID[0];
668 Command0[3] = p & 0xff;
669 p >>= 8;
670 Command0[2] = p & 0xff;
671 if ((status = card_send_command(ioaddr, name, Command0, st)))
672 return status;
673
674 p = PID[1];
675 Command1[3] = p & 0xff;
676 p >>= 8;
677 Command1[2] = p & 0xff;
678 if ((status = card_send_command(ioaddr, name, Command1, st)))
679 return status;
680
681 p = PID[2];
682 Command2[3] = p & 0xff;
683 p >>= 8;
684 Command2[2] = p & 0xff;
685 if ((status = card_send_command(ioaddr, name, Command2, st)))
686 return status;
687
688 p = PID[3];
689 Command3[3] = p & 0xff;
690 p >>= 8;
691 Command3[2] = p & 0xff;
692 if ((status = card_send_command(ioaddr, name, Command3, st)))
693 return status;
694
695 if ((status = card_send_command(ioaddr, name, Command4, st)))
696 return status;
697 return sb1000_end_get_set_command(ioaddr, name);
698}
699
700\f
701static inline void
702sb1000_print_status_buffer(const char* name, unsigned char st[],
703 unsigned char buffer[], int size)
704{
705 int i, j, k;
706
707 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
708 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
709 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
710 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
711 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
712 buffer[46] << 8 | buffer[47],
713 buffer[42], buffer[43], buffer[44], buffer[45],
714 buffer[48] << 8 | buffer[49]);
715 } else {
716 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
717 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
718 for (j = 0; j < 8 && k < size; j++, k++)
719 printk(" %02x", buffer[k]);
720 printk("\n");
721 }
722 }
723 return;
724}
725
726/*
727 * SB1000 commands for frame rx interrupt
728 */
729/* receive a single frame and assemble datagram
730 * (this is the heart of the interrupt routine)
731 */
732static inline int
733sb1000_rx(struct net_device *dev)
734{
735
736#define FRAMESIZE 184
737 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
738 short dlen;
739 int ioaddr, ns;
740 unsigned int skbsize;
741 struct sk_buff *skb;
742 struct sb1000_private *lp = netdev_priv(dev);
743 struct net_device_stats *stats = &lp->stats;
744
745 /* SB1000 frame constants */
746 const int FrameSize = FRAMESIZE;
747 const int NewDatagramHeaderSkip = 8;
748 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
749 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
750 const int ContDatagramHeaderSkip = 7;
751 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
752 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
753 const int TrailerSize = 4;
754
755 ioaddr = dev->base_addr;
756
757 insw(ioaddr, (unsigned short*) st, 1);
758#ifdef XXXDEBUG
759printk("cm0: received: %02x %02x\n", st[0], st[1]);
760#endif /* XXXDEBUG */
761 lp->rx_frames++;
762
763 /* decide if it is a good or bad frame */
764 for (ns = 0; ns < NPIDS; ns++) {
765 session_id = lp->rx_session_id[ns];
766 frame_id = lp->rx_frame_id[ns];
767 if (st[0] == session_id) {
768 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
769 goto good_frame;
770 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
771 goto skipped_frame;
772 } else {
773 goto bad_frame;
774 }
775 } else if (st[0] == (session_id | 0x40)) {
776 if ((st[1] & 0xf0) == 0x30) {
777 goto skipped_frame;
778 } else {
779 goto bad_frame;
780 }
781 }
782 }
783 goto bad_frame;
784
785skipped_frame:
786 stats->rx_frame_errors++;
787 skb = lp->rx_skb[ns];
788 if (sb1000_debug > 1)
789 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
790 "expecting %02x %02x\n", dev->name, st[0], st[1],
791 skb ? session_id : session_id | 0x40, frame_id);
792 if (skb) {
793 dev_kfree_skb(skb);
794 skb = NULL;
795 }
796
797good_frame:
798 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
799 /* new datagram */
800 if (st[0] & 0x40) {
801 /* get data length */
802 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
803#ifdef XXXDEBUG
804printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
805#endif /* XXXDEBUG */
806 if (buffer[0] != NewDatagramHeaderSkip) {
807 if (sb1000_debug > 1)
808 printk(KERN_WARNING "%s: new datagram header skip error: "
809 "got %02x expecting %02x\n", dev->name, buffer[0],
810 NewDatagramHeaderSkip);
811 stats->rx_length_errors++;
812 insw(ioaddr, buffer, NewDatagramDataSize / 2);
813 goto bad_frame_next;
814 }
815 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
816 buffer[NewDatagramHeaderSkip + 4]) - 17;
817 if (dlen > SB1000_MRU) {
818 if (sb1000_debug > 1)
819 printk(KERN_WARNING "%s: datagram length (%d) greater "
820 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
821 stats->rx_length_errors++;
822 insw(ioaddr, buffer, NewDatagramDataSize / 2);
823 goto bad_frame_next;
824 }
825 lp->rx_dlen[ns] = dlen;
826 /* compute size to allocate for datagram */
827 skbsize = dlen + FrameSize;
828 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
829 if (sb1000_debug > 1)
830 printk(KERN_WARNING "%s: can't allocate %d bytes long "
831 "skbuff\n", dev->name, skbsize);
832 stats->rx_dropped++;
833 insw(ioaddr, buffer, NewDatagramDataSize / 2);
834 goto dropped_frame;
835 }
836 skb->dev = dev;
837 skb->mac.raw = skb->data;
838 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
839 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
840 NewDatagramDataSize / 2);
841 lp->rx_skb[ns] = skb;
842 } else {
843 /* continuation of previous datagram */
844 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
845 if (buffer[0] != ContDatagramHeaderSkip) {
846 if (sb1000_debug > 1)
847 printk(KERN_WARNING "%s: cont datagram header skip error: "
848 "got %02x expecting %02x\n", dev->name, buffer[0],
849 ContDatagramHeaderSkip);
850 stats->rx_length_errors++;
851 insw(ioaddr, buffer, ContDatagramDataSize / 2);
852 goto bad_frame_next;
853 }
854 skb = lp->rx_skb[ns];
855 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
856 ContDatagramDataSize / 2);
857 dlen = lp->rx_dlen[ns];
858 }
859 if (skb->len < dlen + TrailerSize) {
860 lp->rx_session_id[ns] &= ~0x40;
861 return 0;
862 }
863
864 /* datagram completed: send to upper level */
865 skb_trim(skb, dlen);
866 netif_rx(skb);
867 dev->last_rx = jiffies;
868 stats->rx_bytes+=dlen;
869 stats->rx_packets++;
870 lp->rx_skb[ns] = NULL;
871 lp->rx_session_id[ns] |= 0x40;
872 return 0;
873
874bad_frame:
875 insw(ioaddr, buffer, FrameSize / 2);
876 if (sb1000_debug > 1)
877 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
878 dev->name, st[0], st[1]);
879 stats->rx_frame_errors++;
880bad_frame_next:
881 if (sb1000_debug > 2)
882 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
883dropped_frame:
884 stats->rx_errors++;
885 if (ns < NPIDS) {
886 if ((skb = lp->rx_skb[ns])) {
887 dev_kfree_skb(skb);
888 lp->rx_skb[ns] = NULL;
889 }
890 lp->rx_session_id[ns] |= 0x40;
891 }
892 return -1;
893}
894
895static inline void
896sb1000_error_dpc(struct net_device *dev)
897{
898 char *name;
899 unsigned char st[5];
900 int ioaddr[2];
901 struct sb1000_private *lp = netdev_priv(dev);
902 const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
903 const int ErrorDpcCounterInitialize = 200;
904
905 ioaddr[0] = dev->base_addr;
906 /* mem_start holds the second I/O address */
907 ioaddr[1] = dev->mem_start;
908 name = dev->name;
909
910 sb1000_wait_for_ready_clear(ioaddr, name);
911 sb1000_send_command(ioaddr, name, Command0);
912 sb1000_wait_for_ready(ioaddr, name);
913 sb1000_read_status(ioaddr, st);
914 if (st[1] & 0x10)
915 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
916 return;
917}
918
919\f
920/*
921 * Linux interface functions
922 */
923static int
924sb1000_open(struct net_device *dev)
925{
926 char *name;
927 int ioaddr[2], status;
928 struct sb1000_private *lp = netdev_priv(dev);
929 const unsigned short FirmwareVersion[] = {0x01, 0x01};
930
931 ioaddr[0] = dev->base_addr;
932 /* mem_start holds the second I/O address */
933 ioaddr[1] = dev->mem_start;
934 name = dev->name;
935
936 /* initialize sb1000 */
937 if ((status = sb1000_reset(ioaddr, name)))
938 return status;
a26c074c 939 ssleep(1);
1da177e4
LT		 940 if ((status = sb1000_check_CRC(ioaddr, name)))
941 return status;
942
943 /* initialize private data before board can catch interrupts */
944 lp->rx_skb[0] = NULL;
945 lp->rx_skb[1] = NULL;
946 lp->rx_skb[2] = NULL;
947 lp->rx_skb[3] = NULL;
948 lp->rx_dlen[0] = 0;
949 lp->rx_dlen[1] = 0;
950 lp->rx_dlen[2] = 0;
951 lp->rx_dlen[3] = 0;
952 lp->rx_frames = 0;
953 lp->rx_error_count = 0;
954 lp->rx_error_dpc_count = 0;
955 lp->rx_session_id[0] = 0x50;
956 lp->rx_session_id[0] = 0x48;
957 lp->rx_session_id[0] = 0x44;
958 lp->rx_session_id[0] = 0x42;
959 lp->rx_frame_id[0] = 0;
960 lp->rx_frame_id[1] = 0;
961 lp->rx_frame_id[2] = 0;
962 lp->rx_frame_id[3] = 0;
963 if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
964 return -EAGAIN;
965 }
966
967 if (sb1000_debug > 2)
968 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
969
970 /* Activate board and check firmware version */
971 udelay(1000);
972 if ((status = sb1000_activate(ioaddr, name)))
973 return status;
974 udelay(0);
975 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
976 return status;
977 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
978 printk(KERN_WARNING "%s: found firmware version %x.%02x "
979 "(should be %x.%02x)\n", name, version[0], version[1],
980 FirmwareVersion[0], FirmwareVersion[1]);
981
982
983 netif_start_queue(dev);
984 return 0; /* Always succeed */
985}
986
987static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
988{
989 char* name;
990 unsigned char version[2];
991 short PID[4];
992 int ioaddr[2], status, frequency;
993 unsigned int stats[5];
994 struct sb1000_private *lp = netdev_priv(dev);
995
996 if (!(dev && dev->flags & IFF_UP))
997 return -ENODEV;
998
999 ioaddr[0] = dev->base_addr;
1000 /* mem_start holds the second I/O address */
1001 ioaddr[1] = dev->mem_start;
1002 name = dev->name;
1003
1004 switch (cmd) {
1005 case SIOCGCMSTATS: /* get statistics */
1006 stats[0] = lp->stats.rx_bytes;
1007 stats[1] = lp->rx_frames;
1008 stats[2] = lp->stats.rx_packets;
1009 stats[3] = lp->stats.rx_errors;
1010 stats[4] = lp->stats.rx_dropped;
1011 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1012 return -EFAULT;
1013 status = 0;
1014 break;
1015
1016 case SIOCGCMFIRMWARE: /* get firmware version */
1017 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1018 return status;
1019 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1020 return -EFAULT;
1021 break;
1022
1023 case SIOCGCMFREQUENCY: /* get frequency */
1024 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1025 return status;
1026 if(put_user(frequency, (int __user *) ifr->ifr_data))
1027 return -EFAULT;
1028 break;
1029
1030 case SIOCSCMFREQUENCY: /* set frequency */
1031 if (!capable(CAP_NET_ADMIN))
1032 return -EPERM;
1033 if(get_user(frequency, (int __user *) ifr->ifr_data))
1034 return -EFAULT;
1035 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1036 return status;
1037 break;
1038
1039 case SIOCGCMPIDS: /* get PIDs */
1040 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1041 return status;
1042 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1043 return -EFAULT;
1044 break;
1045
1046 case SIOCSCMPIDS: /* set PIDs */
1047 if (!capable(CAP_NET_ADMIN))
1048 return -EPERM;
1049 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1050 return -EFAULT;
1051 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1052 return status;
1053 /* set session_id, frame_id and pkt_type too */
1054 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1055 lp->rx_session_id[1] = 0x48;
1056 lp->rx_session_id[2] = 0x44;
1057 lp->rx_session_id[3] = 0x42;
1058 lp->rx_frame_id[0] = 0;
1059 lp->rx_frame_id[1] = 0;
1060 lp->rx_frame_id[2] = 0;
1061 lp->rx_frame_id[3] = 0;
1062 break;
1063
1064 default:
1065 status = -EINVAL;
1066 break;
1067 }
1068 return status;
1069}
1070
1071/* transmit function: do nothing since SB1000 can't send anything out */
1072static int
1073sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1074{
1075 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1076 /* sb1000 can't xmit datagrams */
1077 dev_kfree_skb(skb);
1078 return 0;
1079}
1080
1081/* SB1000 interrupt handler. */
1082static irqreturn_t sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1083{
1084 char *name;
1085 unsigned char st;
1086 int ioaddr[2];
1087 struct net_device *dev = (struct net_device *) dev_id;
1088 struct sb1000_private *lp = netdev_priv(dev);
1089
1090 const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1091 const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1092 const int MaxRxErrorCount = 6;
1093
1094 if (dev == NULL) {
1095 printk(KERN_ERR "sb1000_interrupt(): irq %d for unknown device.\n",
1096 irq);
1097 return IRQ_NONE;
1098 }
1099
1100 ioaddr[0] = dev->base_addr;
1101 /* mem_start holds the second I/O address */
1102 ioaddr[1] = dev->mem_start;
1103 name = dev->name;
1104
1105 /* is it a good interrupt? */
1106 st = inb(ioaddr[1] + 6);
1107 if (!(st & 0x08 && st & 0x20)) {
1108 return IRQ_NONE;
1109 }
1110
1111 if (sb1000_debug > 3)
1112 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1113
1114 st = inb(ioaddr[0] + 7);
1115 if (sb1000_rx(dev))
1116 lp->rx_error_count++;
1117#ifdef SB1000_DELAY
1118 udelay(SB1000_DELAY);
1119#endif /* SB1000_DELAY */
1120 sb1000_issue_read_command(ioaddr, name);
1121 if (st & 0x01) {
1122 sb1000_error_dpc(dev);
1123 sb1000_issue_read_command(ioaddr, name);
1124 }
1125 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1126 sb1000_wait_for_ready_clear(ioaddr, name);
1127 sb1000_send_command(ioaddr, name, Command0);
1128 sb1000_wait_for_ready(ioaddr, name);
1129 sb1000_issue_read_command(ioaddr, name);
1130 }
1131 if (lp->rx_error_count >= MaxRxErrorCount) {
1132 sb1000_wait_for_ready_clear(ioaddr, name);
1133 sb1000_send_command(ioaddr, name, Command1);
1134 sb1000_wait_for_ready(ioaddr, name);
1135 sb1000_issue_read_command(ioaddr, name);
1136 lp->rx_error_count = 0;
1137 }
1138
1139 return IRQ_HANDLED;
1140}
1141
1142static struct net_device_stats *sb1000_stats(struct net_device *dev)
1143{
1144 struct sb1000_private *lp = netdev_priv(dev);
1145 return &lp->stats;
1146}
1147
1148static int sb1000_close(struct net_device *dev)
1149{
1150 int i;
1151 int ioaddr[2];
1152 struct sb1000_private *lp = netdev_priv(dev);
1153
1154 if (sb1000_debug > 2)
1155 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1156
1157 netif_stop_queue(dev);
1158
1159 ioaddr[0] = dev->base_addr;
1160 /* mem_start holds the second I/O address */
1161 ioaddr[1] = dev->mem_start;
1162
1163 free_irq(dev->irq, dev);
1164 /* If we don't do this, we can't re-insmod it later. */
1165 release_region(ioaddr[1], SB1000_IO_EXTENT);
1166 release_region(ioaddr[0], SB1000_IO_EXTENT);
1167
1168 /* free rx_skb's if needed */
1169 for (i=0; i<4; i++) {
1170 if (lp->rx_skb[i]) {
1171 dev_kfree_skb(lp->rx_skb[i]);
1172 }
1173 }
1174 return 0;
1175}
1176
1177MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1178MODULE_DESCRIPTION("General Instruments SB1000 driver");
1179MODULE_LICENSE("GPL");
1180
1181static int __init
1182sb1000_init(void)
1183{
1184 return pnp_register_driver(&sb1000_driver);
1185}
1186
1187static void __exit
1188sb1000_exit(void)
1189{
1190 pnp_unregister_driver(&sb1000_driver);
1191}
1192
1193module_init(sb1000_init);
1194module_exit(sb1000_exit);
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