1
/* sb1000.c: A General Instruments SB1000 driver for linux. */
3
Written 1998 by Franco Venturi.
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.
10
This driver is for the General Instruments SB1000 (internal SURFboard)
12
The author may be reached as fventuri@mediaone.net
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.
22
981115 Steven Hirsch <shirsch@adelphia.net>
24
Linus changed the timer interface. Should work on all recent
27
980608 Steven Hirsch <shirsch@adelphia.net>
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.
32
Merged with 2.2 - Alan Cox
35
static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
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 */
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>
57
#include <asm/processor.h>
58
#include <asm/uaccess.h>
61
static int sb1000_debug = SB1000_DEBUG;
63
static const int sb1000_debug = 1;
66
static const int SB1000_IO_EXTENT = 8;
67
/* SB1000 Maximum Receive Unit */
68
static const int SB1000_MRU = 1500; /* octects */
71
struct sb1000_private {
72
struct sk_buff *rx_skb[NPIDS];
74
unsigned int rx_frames;
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];
82
/* prototypes for Linux interface */
83
extern int sb1000_probe(struct net_device *dev);
84
static int sb1000_open(struct net_device *dev);
85
static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
86
static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
87
struct net_device *dev);
88
static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
89
static int sb1000_close(struct net_device *dev);
92
/* SB1000 hardware routines to be used during open/configuration phases */
93
static int card_wait_for_busy_clear(const int ioaddr[],
95
static int card_wait_for_ready(const int ioaddr[], const char* name,
97
static int card_send_command(const int ioaddr[], const char* name,
98
const unsigned char out[], unsigned char in[]);
100
/* SB1000 hardware routines to be used during frame rx interrupt */
101
static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
102
static int sb1000_wait_for_ready_clear(const int ioaddr[],
104
static void sb1000_send_command(const int ioaddr[], const char* name,
105
const unsigned char out[]);
106
static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
107
static void sb1000_issue_read_command(const int ioaddr[],
110
/* SB1000 commands for open/configuration */
111
static int sb1000_reset(const int ioaddr[], const char* name);
112
static int sb1000_check_CRC(const int ioaddr[], const char* name);
113
static inline int sb1000_start_get_set_command(const int ioaddr[],
115
static int sb1000_end_get_set_command(const int ioaddr[],
117
static int sb1000_activate(const int ioaddr[], const char* name);
118
static int sb1000_get_firmware_version(const int ioaddr[],
119
const char* name, unsigned char version[], int do_end);
120
static int sb1000_get_frequency(const int ioaddr[], const char* name,
122
static int sb1000_set_frequency(const int ioaddr[], const char* name,
124
static int sb1000_get_PIDs(const int ioaddr[], const char* name,
126
static int sb1000_set_PIDs(const int ioaddr[], const char* name,
129
/* SB1000 commands for frame rx interrupt */
130
static int sb1000_rx(struct net_device *dev);
131
static void sb1000_error_dpc(struct net_device *dev);
133
static const struct pnp_device_id sb1000_pnp_ids[] = {
137
MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
139
static 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,
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.ndo_set_mac_address = eth_mac_addr,
146
.ndo_validate_addr = eth_validate_addr,
150
sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
152
struct net_device *dev;
153
unsigned short ioaddr[2], irq;
154
unsigned int serial_number;
157
if (pnp_device_attach(pdev) < 0)
159
if (pnp_activate_dev(pdev) < 0)
162
if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
164
if (!pnp_irq_valid(pdev, 0))
167
serial_number = pdev->card->serial;
169
ioaddr[0] = pnp_port_start(pdev, 0);
170
ioaddr[1] = pnp_port_start(pdev, 0);
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irq = pnp_irq(pdev, 0);
174
if (!request_region(ioaddr[0], 16, "sb1000"))
176
if (!request_region(ioaddr[1], 16, "sb1000"))
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goto out_release_region0;
179
dev = alloc_etherdev(sizeof(struct sb1000_private));
182
goto out_release_regions;
186
dev->base_addr = ioaddr[0];
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/* mem_start holds the second I/O address */
188
dev->mem_start = ioaddr[1];
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);
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.
200
dev->flags = IFF_POINTOPOINT|IFF_NOARP;
202
SET_NETDEV_DEV(dev, &pdev->dev);
204
if (sb1000_debug > 0)
205
printk(KERN_NOTICE "%s", version);
207
dev->netdev_ops = &sb1000_netdev_ops;
209
/* hardware address is 0:0:serial_number */
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dev->dev_addr[2] = serial_number >> 24 & 0xff;
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dev->dev_addr[3] = serial_number >> 16 & 0xff;
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dev->dev_addr[4] = serial_number >> 8 & 0xff;
213
dev->dev_addr[5] = serial_number >> 0 & 0xff;
215
pnp_set_drvdata(pdev, dev);
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error = register_netdev(dev);
219
goto out_free_netdev;
225
release_region(ioaddr[1], 16);
227
release_region(ioaddr[0], 16);
229
pnp_disable_dev(pdev);
231
pnp_device_detach(pdev);
236
sb1000_remove_one(struct pnp_dev *pdev)
238
struct net_device *dev = pnp_get_drvdata(pdev);
240
unregister_netdev(dev);
241
release_region(dev->base_addr, 16);
242
release_region(dev->mem_start, 16);
246
static struct pnp_driver sb1000_driver = {
248
.id_table = sb1000_pnp_ids,
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.probe = sb1000_probe_one,
250
.remove = sb1000_remove_one,
255
* SB1000 hardware routines to be used during open/configuration phases
258
static const int TimeOutJiffies = (875 * HZ) / 100;
260
/* Card Wait For Busy Clear (cannot be used during an interrupt) */
262
card_wait_for_busy_clear(const int ioaddr[], const char* name)
265
unsigned long timeout;
267
a = inb(ioaddr[0] + 7);
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timeout = jiffies + TimeOutJiffies;
269
while (a & 0x80 || a & 0x40) {
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",
284
/* Card Wait For Ready (cannot be used during an interrupt) */
286
card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
289
unsigned long timeout;
291
a = inb(ioaddr[1] + 6);
292
timeout = jiffies + TimeOutJiffies;
293
while (a & 0x80 || !(a & 0x40)) {
297
a = inb(ioaddr[1] + 6);
298
if (time_after_eq(jiffies, timeout)) {
299
printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
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);
315
/* Card Send Command (cannot be used during an interrupt) */
317
card_send_command(const int ioaddr[], const char* name,
318
const unsigned char out[], unsigned char in[])
322
if ((status = card_wait_for_busy_clear(ioaddr, name)))
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)))
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],
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in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
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]);
349
if (out[1] == 0x1b) {
350
x = (out[2] == 0x02);
352
if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
360
* SB1000 hardware routines to be used during frame rx interrupt
362
static const int Sb1000TimeOutJiffies = 7 * HZ;
364
/* Card Wait For Ready (to be used during frame rx) */
366
sb1000_wait_for_ready(const int ioaddr[], const char* name)
368
unsigned long timeout;
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",
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",
390
/* Card Wait For Ready Clear (to be used during frame rx) */
392
sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
394
unsigned long timeout;
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",
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",
415
/* Card Send Command (to be used during frame rx) */
417
sb1000_send_command(const int ioaddr[], const char* name,
418
const unsigned char out[])
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]);
431
/* Card Read Status (to be used during frame rx) */
433
sb1000_read_status(const int ioaddr[], unsigned char in[])
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);
442
/* Issue Read Command (to be used during frame rx) */
444
sb1000_issue_read_command(const int ioaddr[], const char* name)
446
static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
448
sb1000_wait_for_ready_clear(ioaddr, name);
449
outb(0xa0, ioaddr[0] + 6);
450
sb1000_send_command(ioaddr, name, Command0);
455
* SB1000 commands for open/configuration
457
/* reset SB1000 card */
459
sb1000_reset(const int ioaddr[], const char* name)
461
static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
466
port = ioaddr[1] + 6;
480
if ((status = card_send_command(ioaddr, name, Command0, st)))
487
/* check SB1000 firmware CRC */
489
sb1000_check_CRC(const int ioaddr[], const char* name)
491
static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
497
if ((status = card_send_command(ioaddr, name, Command0, st)))
499
if (st[1] != st[3] || st[2] != st[4])
501
crc = st[1] << 8 | st[2];
506
sb1000_start_get_set_command(const int ioaddr[], const char* name)
508
static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
512
return card_send_command(ioaddr, name, Command0, st);
516
sb1000_end_get_set_command(const int ioaddr[], const char* name)
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};
524
if ((status = card_send_command(ioaddr, name, Command0, st)))
526
return card_send_command(ioaddr, name, Command1, st);
530
sb1000_activate(const int ioaddr[], const char* name)
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};
539
if ((status = card_send_command(ioaddr, name, Command0, st)))
541
if ((status = card_send_command(ioaddr, name, Command1, st)))
544
if ((status = sb1000_start_get_set_command(ioaddr, name)))
549
return sb1000_start_get_set_command(ioaddr, name);
552
/* get SB1000 firmware version */
554
sb1000_get_firmware_version(const int ioaddr[], const char* name,
555
unsigned char version[], int do_end)
557
static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
562
if ((status = sb1000_start_get_set_command(ioaddr, name)))
564
if ((status = card_send_command(ioaddr, name, Command0, st)))
571
return sb1000_end_get_set_command(ioaddr, name);
576
/* get SB1000 frequency */
578
sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
580
static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
586
if ((status = sb1000_start_get_set_command(ioaddr, name)))
588
if ((status = card_send_command(ioaddr, name, Command0, st)))
590
*frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
591
return sb1000_end_get_set_command(ioaddr, name);
594
/* set SB1000 frequency */
596
sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
600
unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
602
const int FrequencyLowerLimit = 57000;
603
const int FrequencyUpperLimit = 804000;
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);
612
if ((status = sb1000_start_get_set_command(ioaddr, name)))
614
Command0[5] = frequency & 0xff;
616
Command0[4] = frequency & 0xff;
618
Command0[3] = frequency & 0xff;
620
Command0[2] = frequency & 0xff;
621
return card_send_command(ioaddr, name, Command0, st);
624
/* get SB1000 PIDs */
626
sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
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};
637
if ((status = sb1000_start_get_set_command(ioaddr, name)))
640
if ((status = card_send_command(ioaddr, name, Command0, st)))
642
PID[0] = st[1] << 8 | st[2];
644
if ((status = card_send_command(ioaddr, name, Command1, st)))
646
PID[1] = st[1] << 8 | st[2];
648
if ((status = card_send_command(ioaddr, name, Command2, st)))
650
PID[2] = st[1] << 8 | st[2];
652
if ((status = card_send_command(ioaddr, name, Command3, st)))
654
PID[3] = st[1] << 8 | st[2];
656
return sb1000_end_get_set_command(ioaddr, name);
659
/* set SB1000 PIDs */
661
sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
663
static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
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};
674
if ((status = sb1000_start_get_set_command(ioaddr, name)))
678
Command0[3] = p & 0xff;
680
Command0[2] = p & 0xff;
681
if ((status = card_send_command(ioaddr, name, Command0, st)))
685
Command1[3] = p & 0xff;
687
Command1[2] = p & 0xff;
688
if ((status = card_send_command(ioaddr, name, Command1, st)))
692
Command2[3] = p & 0xff;
694
Command2[2] = p & 0xff;
695
if ((status = card_send_command(ioaddr, name, Command2, st)))
699
Command3[3] = p & 0xff;
701
Command3[2] = p & 0xff;
702
if ((status = card_send_command(ioaddr, name, Command3, st)))
705
if ((status = card_send_command(ioaddr, name, Command4, st)))
707
return sb1000_end_get_set_command(ioaddr, name);
712
sb1000_print_status_buffer(const char* name, unsigned char st[],
713
unsigned char buffer[], int size)
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]);
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]);
736
* SB1000 commands for frame rx interrupt
738
/* receive a single frame and assemble datagram
739
* (this is the heart of the interrupt routine)
742
sb1000_rx(struct net_device *dev)
745
#define FRAMESIZE 184
746
unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
749
unsigned int skbsize;
751
struct sb1000_private *lp = netdev_priv(dev);
752
struct net_device_stats *stats = &dev->stats;
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;
764
ioaddr = dev->base_addr;
766
insw(ioaddr, (unsigned short*) st, 1);
768
printk("cm0: received: %02x %02x\n", st[0], st[1]);
769
#endif /* XXXDEBUG */
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)) {
779
} else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
784
} else if (st[0] == (session_id | 0x40)) {
785
if ((st[1] & 0xf0) == 0x30) {
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);
807
lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
810
/* get data length */
811
insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
813
printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
814
#endif /* XXXDEBUG */
815
if (buffer[0] != NewDatagramHeaderSkip) {
816
if (sb1000_debug > 1)
817
printk(KERN_WARNING "%s: new datagram header skip error: "
818
"got %02x expecting %02x\n", dev->name, buffer[0],
819
NewDatagramHeaderSkip);
820
stats->rx_length_errors++;
821
insw(ioaddr, buffer, NewDatagramDataSize / 2);
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);
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);
842
insw(ioaddr, buffer, NewDatagramDataSize / 2);
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;
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);
863
skb = lp->rx_skb[ns];
864
insw(ioaddr, skb_put(skb, ContDatagramDataSize),
865
ContDatagramDataSize / 2);
866
dlen = lp->rx_dlen[ns];
868
if (skb->len < dlen + TrailerSize) {
869
lp->rx_session_id[ns] &= ~0x40;
873
/* datagram completed: send to upper level */
876
stats->rx_bytes+=dlen;
878
lp->rx_skb[ns] = NULL;
879
lp->rx_session_id[ns] |= 0x40;
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++;
889
if (sb1000_debug > 2)
890
sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
894
if ((skb = lp->rx_skb[ns])) {
896
lp->rx_skb[ns] = NULL;
898
lp->rx_session_id[ns] |= 0x40;
904
sb1000_error_dpc(struct net_device *dev)
906
static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
911
struct sb1000_private *lp = netdev_priv(dev);
912
const int ErrorDpcCounterInitialize = 200;
914
ioaddr[0] = dev->base_addr;
915
/* mem_start holds the second I/O address */
916
ioaddr[1] = dev->mem_start;
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);
924
lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
929
* Linux interface functions
932
sb1000_open(struct net_device *dev)
935
int ioaddr[2], status;
936
struct sb1000_private *lp = netdev_priv(dev);
937
const unsigned short FirmwareVersion[] = {0x01, 0x01};
939
ioaddr[0] = dev->base_addr;
940
/* mem_start holds the second I/O address */
941
ioaddr[1] = dev->mem_start;
944
/* initialize sb1000 */
945
if ((status = sb1000_reset(ioaddr, name)))
948
if ((status = sb1000_check_CRC(ioaddr, name)))
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;
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)) {
975
if (sb1000_debug > 2)
976
printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
978
/* Activate board and check firmware version */
980
if ((status = sb1000_activate(ioaddr, name)))
983
if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
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]);
991
netif_start_queue(dev);
992
return 0; /* Always succeed */
995
static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
998
unsigned char version[2];
1000
int ioaddr[2], status, frequency;
1001
unsigned int stats[5];
1002
struct sb1000_private *lp = netdev_priv(dev);
1004
if (!(dev && dev->flags & IFF_UP))
1007
ioaddr[0] = dev->base_addr;
1008
/* mem_start holds the second I/O address */
1009
ioaddr[1] = dev->mem_start;
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)))
1024
case SIOCGCMFIRMWARE: /* get firmware version */
1025
if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1027
if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1031
case SIOCGCMFREQUENCY: /* get frequency */
1032
if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1034
if(put_user(frequency, (int __user *) ifr->ifr_data))
1038
case SIOCSCMFREQUENCY: /* set frequency */
1039
if (!capable(CAP_NET_ADMIN))
1041
if(get_user(frequency, (int __user *) ifr->ifr_data))
1043
if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1047
case SIOCGCMPIDS: /* get PIDs */
1048
if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1050
if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1054
case SIOCSCMPIDS: /* set PIDs */
1055
if (!capable(CAP_NET_ADMIN))
1057
if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1059
if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
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;
1079
/* transmit function: do nothing since SB1000 can't send anything out */
1081
sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1083
printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1084
/* sb1000 can't xmit datagrams */
1086
return NETDEV_TX_OK;
1089
/* SB1000 interrupt handler. */
1090
static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
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};
1098
struct net_device *dev = dev_id;
1099
struct sb1000_private *lp = netdev_priv(dev);
1101
const int MaxRxErrorCount = 6;
1103
ioaddr[0] = dev->base_addr;
1104
/* mem_start holds the second I/O address */
1105
ioaddr[1] = dev->mem_start;
1108
/* is it a good interrupt? */
1109
st = inb(ioaddr[1] + 6);
1110
if (!(st & 0x08 && st & 0x20)) {
1114
if (sb1000_debug > 3)
1115
printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1117
st = inb(ioaddr[0] + 7);
1119
lp->rx_error_count++;
1121
udelay(SB1000_DELAY);
1122
#endif /* SB1000_DELAY */
1123
sb1000_issue_read_command(ioaddr, name);
1125
sb1000_error_dpc(dev);
1126
sb1000_issue_read_command(ioaddr, name);
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);
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;
1145
static int sb1000_close(struct net_device *dev)
1149
struct sb1000_private *lp = netdev_priv(dev);
1151
if (sb1000_debug > 2)
1152
printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1154
netif_stop_queue(dev);
1156
ioaddr[0] = dev->base_addr;
1157
/* mem_start holds the second I/O address */
1158
ioaddr[1] = dev->mem_start;
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);
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]);
1174
MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1175
MODULE_DESCRIPTION("General Instruments SB1000 driver");
1176
MODULE_LICENSE("GPL");
1181
return pnp_register_driver(&sb1000_driver);
1187
pnp_unregister_driver(&sb1000_driver);
1190
module_init(sb1000_init);
1191
module_exit(sb1000_exit);