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)
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.
24 Linus changed the timer interface. Should work on all recent
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
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 */
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>
56 #include <asm/processor.h>
57 #include <asm/uaccess.h>
60 static int sb1000_debug = SB1000_DEBUG;
62 static const int sb1000_debug = 1;
65 static const int SB1000_IO_EXTENT = 8;
66 /* SB1000 Maximum Receive Unit */
67 static const int SB1000_MRU = 1500; /* octects */
70 struct sb1000_private {
71 struct sk_buff *rx_skb[NPIDS];
73 unsigned int rx_frames;
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];
81 /* prototypes for Linux interface */
82 extern int sb1000_probe(struct net_device *dev);
83 static int sb1000_open(struct net_device *dev);
84 static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
85 static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
86 static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
87 static int sb1000_close(struct net_device *dev);
90 /* SB1000 hardware routines to be used during open/configuration phases */
91 static int card_wait_for_busy_clear(const int ioaddr[],
93 static int card_wait_for_ready(const int ioaddr[], const char* name,
95 static int card_send_command(const int ioaddr[], const char* name,
96 const unsigned char out[], unsigned char in[]);
98 /* SB1000 hardware routines to be used during frame rx interrupt */
99 static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
100 static int sb1000_wait_for_ready_clear(const int ioaddr[],
102 static void sb1000_send_command(const int ioaddr[], const char* name,
103 const unsigned char out[]);
104 static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
105 static void sb1000_issue_read_command(const int ioaddr[],
108 /* SB1000 commands for open/configuration */
109 static int sb1000_reset(const int ioaddr[], const char* name);
110 static int sb1000_check_CRC(const int ioaddr[], const char* name);
111 static inline int sb1000_start_get_set_command(const int ioaddr[],
113 static int sb1000_end_get_set_command(const int ioaddr[],
115 static int sb1000_activate(const int ioaddr[], const char* name);
116 static int sb1000_get_firmware_version(const int ioaddr[],
117 const char* name, unsigned char version[], int do_end);
118 static int sb1000_get_frequency(const int ioaddr[], const char* name,
120 static int sb1000_set_frequency(const int ioaddr[], const char* name,
122 static int sb1000_get_PIDs(const int ioaddr[], const char* name,
124 static int sb1000_set_PIDs(const int ioaddr[], const char* name,
127 /* SB1000 commands for frame rx interrupt */
128 static int sb1000_rx(struct net_device *dev);
129 static void sb1000_error_dpc(struct net_device *dev);
131 static const struct pnp_device_id sb1000_pnp_ids[] = {
135 MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
137 static const struct net_device_ops sb1000_netdev_ops = {
138 .ndo_open = sb1000_open,
139 .ndo_start_xmit = sb1000_start_xmit,
140 .ndo_do_ioctl = sb1000_dev_ioctl,
141 .ndo_stop = sb1000_close,
142 .ndo_change_mtu = eth_change_mtu,
143 .ndo_set_mac_address = eth_mac_addr,
144 .ndo_validate_addr = eth_validate_addr,
148 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
150 struct net_device *dev;
151 unsigned short ioaddr[2], irq;
152 unsigned int serial_number;
155 if (pnp_device_attach(pdev) < 0)
157 if (pnp_activate_dev(pdev) < 0)
160 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
162 if (!pnp_irq_valid(pdev, 0))
165 serial_number = pdev->card->serial;
167 ioaddr[0] = pnp_port_start(pdev, 0);
168 ioaddr[1] = pnp_port_start(pdev, 0);
170 irq = pnp_irq(pdev, 0);
172 if (!request_region(ioaddr[0], 16, "sb1000"))
174 if (!request_region(ioaddr[1], 16, "sb1000"))
175 goto out_release_region0;
177 dev = alloc_etherdev(sizeof(struct sb1000_private));
180 goto out_release_regions;
184 dev->base_addr = ioaddr[0];
185 /* mem_start holds the second I/O address */
186 dev->mem_start = ioaddr[1];
189 if (sb1000_debug > 0)
190 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
191 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
192 dev->mem_start, serial_number, dev->irq);
195 * The SB1000 is an rx-only cable modem device. The uplink is a modem
196 * and we do not want to arp on it.
198 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
200 SET_NETDEV_DEV(dev, &pdev->dev);
202 if (sb1000_debug > 0)
203 printk(KERN_NOTICE "%s", version);
205 dev->netdev_ops = &sb1000_netdev_ops;
207 /* hardware address is 0:0:serial_number */
208 dev->dev_addr[2] = serial_number >> 24 & 0xff;
209 dev->dev_addr[3] = serial_number >> 16 & 0xff;
210 dev->dev_addr[4] = serial_number >> 8 & 0xff;
211 dev->dev_addr[5] = serial_number >> 0 & 0xff;
213 pnp_set_drvdata(pdev, dev);
215 error = register_netdev(dev);
217 goto out_free_netdev;
223 release_region(ioaddr[1], 16);
225 release_region(ioaddr[0], 16);
227 pnp_disable_dev(pdev);
229 pnp_device_detach(pdev);
234 sb1000_remove_one(struct pnp_dev *pdev)
236 struct net_device *dev = pnp_get_drvdata(pdev);
238 unregister_netdev(dev);
239 release_region(dev->base_addr, 16);
240 release_region(dev->mem_start, 16);
244 static struct pnp_driver sb1000_driver = {
246 .id_table = sb1000_pnp_ids,
247 .probe = sb1000_probe_one,
248 .remove = sb1000_remove_one,
253 * SB1000 hardware routines to be used during open/configuration phases
256 static const int TimeOutJiffies = (875 * HZ) / 100;
258 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
260 card_wait_for_busy_clear(const int ioaddr[], const char* name)
263 unsigned long timeout;
265 a = inb(ioaddr[0] + 7);
266 timeout = jiffies + TimeOutJiffies;
267 while (a & 0x80 || a & 0x40) {
271 a = inb(ioaddr[0] + 7);
272 if (time_after_eq(jiffies, timeout)) {
273 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
282 /* Card Wait For Ready (cannot be used during an interrupt) */
284 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
287 unsigned long timeout;
289 a = inb(ioaddr[1] + 6);
290 timeout = jiffies + TimeOutJiffies;
291 while (a & 0x80 || !(a & 0x40)) {
295 a = inb(ioaddr[1] + 6);
296 if (time_after_eq(jiffies, timeout)) {
297 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
303 in[1] = inb(ioaddr[0] + 1);
304 in[2] = inb(ioaddr[0] + 2);
305 in[3] = inb(ioaddr[0] + 3);
306 in[4] = inb(ioaddr[0] + 4);
307 in[0] = inb(ioaddr[0] + 5);
308 in[6] = inb(ioaddr[0] + 6);
309 in[5] = inb(ioaddr[1] + 6);
313 /* Card Send Command (cannot be used during an interrupt) */
315 card_send_command(const int ioaddr[], const char* name,
316 const unsigned char out[], unsigned char in[])
320 if ((status = card_wait_for_busy_clear(ioaddr, name)))
322 outb(0xa0, ioaddr[0] + 6);
323 outb(out[2], ioaddr[0] + 1);
324 outb(out[3], ioaddr[0] + 2);
325 outb(out[4], ioaddr[0] + 3);
326 outb(out[5], ioaddr[0] + 4);
327 outb(out[1], ioaddr[0] + 5);
328 outb(0xa0, ioaddr[0] + 6);
329 outb(out[0], ioaddr[0] + 7);
330 if (out[0] != 0x20 && out[0] != 0x30) {
331 if ((status = card_wait_for_ready(ioaddr, name, in)))
334 if (sb1000_debug > 3)
335 printk(KERN_DEBUG "%s: card_send_command "
336 "out: %02x%02x%02x%02x%02x%02x "
337 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
338 out[0], out[1], out[2], out[3], out[4], out[5],
339 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
341 if (sb1000_debug > 3)
342 printk(KERN_DEBUG "%s: card_send_command "
343 "out: %02x%02x%02x%02x%02x%02x\n", name,
344 out[0], out[1], out[2], out[3], out[4], out[5]);
347 if (out[1] == 0x1b) {
348 x = (out[2] == 0x02);
350 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
358 * SB1000 hardware routines to be used during frame rx interrupt
360 static const int Sb1000TimeOutJiffies = 7 * HZ;
362 /* Card Wait For Ready (to be used during frame rx) */
364 sb1000_wait_for_ready(const int ioaddr[], const char* name)
366 unsigned long timeout;
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",
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",
388 /* Card Wait For Ready Clear (to be used during frame rx) */
390 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
392 unsigned long timeout;
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",
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",
413 /* Card Send Command (to be used during frame rx) */
415 sb1000_send_command(const int ioaddr[], const char* name,
416 const unsigned char out[])
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]);
430 /* Card Read Status (to be used during frame rx) */
432 sb1000_read_status(const int ioaddr[], unsigned char in[])
434 in[1] = inb(ioaddr[0] + 1);
435 in[2] = inb(ioaddr[0] + 2);
436 in[3] = inb(ioaddr[0] + 3);
437 in[4] = inb(ioaddr[0] + 4);
438 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);
456 * SB1000 commands for open/configuration
458 /* reset SB1000 card */
460 sb1000_reset(const int ioaddr[], const char* name)
462 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
467 port = ioaddr[1] + 6;
481 if ((status = card_send_command(ioaddr, name, Command0, st)))
488 /* check SB1000 firmware CRC */
490 sb1000_check_CRC(const int ioaddr[], const char* name)
492 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
498 if ((status = card_send_command(ioaddr, name, Command0, st)))
500 if (st[1] != st[3] || st[2] != st[4])
502 crc = st[1] << 8 | st[2];
507 sb1000_start_get_set_command(const int ioaddr[], const char* name)
509 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
513 return card_send_command(ioaddr, name, Command0, st);
517 sb1000_end_get_set_command(const int ioaddr[], const char* name)
519 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
520 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
525 if ((status = card_send_command(ioaddr, name, Command0, st)))
527 return card_send_command(ioaddr, name, Command1, st);
531 sb1000_activate(const int ioaddr[], const char* name)
533 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
534 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
540 if ((status = card_send_command(ioaddr, name, Command0, st)))
542 if ((status = card_send_command(ioaddr, name, Command1, st)))
545 if ((status = sb1000_start_get_set_command(ioaddr, name)))
550 return sb1000_start_get_set_command(ioaddr, name);
553 /* get SB1000 firmware version */
555 sb1000_get_firmware_version(const int ioaddr[], const char* name,
556 unsigned char version[], int do_end)
558 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
563 if ((status = sb1000_start_get_set_command(ioaddr, name)))
565 if ((status = card_send_command(ioaddr, name, Command0, st)))
572 return sb1000_end_get_set_command(ioaddr, name);
577 /* get SB1000 frequency */
579 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
581 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
587 if ((status = sb1000_start_get_set_command(ioaddr, name)))
589 if ((status = card_send_command(ioaddr, name, Command0, st)))
591 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
592 return sb1000_end_get_set_command(ioaddr, name);
595 /* set SB1000 frequency */
597 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
601 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
603 const int FrequencyLowerLimit = 57000;
604 const int FrequencyUpperLimit = 804000;
606 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
607 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
608 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
609 FrequencyUpperLimit);
613 if ((status = sb1000_start_get_set_command(ioaddr, name)))
615 Command0[5] = frequency & 0xff;
617 Command0[4] = frequency & 0xff;
619 Command0[3] = frequency & 0xff;
621 Command0[2] = frequency & 0xff;
622 return card_send_command(ioaddr, name, Command0, st);
625 /* get SB1000 PIDs */
627 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
629 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
630 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
631 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
632 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
638 if ((status = sb1000_start_get_set_command(ioaddr, name)))
641 if ((status = card_send_command(ioaddr, name, Command0, st)))
643 PID[0] = st[1] << 8 | st[2];
645 if ((status = card_send_command(ioaddr, name, Command1, st)))
647 PID[1] = st[1] << 8 | st[2];
649 if ((status = card_send_command(ioaddr, name, Command2, st)))
651 PID[2] = st[1] << 8 | st[2];
653 if ((status = card_send_command(ioaddr, name, Command3, st)))
655 PID[3] = st[1] << 8 | st[2];
657 return sb1000_end_get_set_command(ioaddr, name);
660 /* set SB1000 PIDs */
662 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
664 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
669 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
670 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
671 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
672 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
675 if ((status = sb1000_start_get_set_command(ioaddr, name)))
679 Command0[3] = p & 0xff;
681 Command0[2] = p & 0xff;
682 if ((status = card_send_command(ioaddr, name, Command0, st)))
686 Command1[3] = p & 0xff;
688 Command1[2] = p & 0xff;
689 if ((status = card_send_command(ioaddr, name, Command1, st)))
693 Command2[3] = p & 0xff;
695 Command2[2] = p & 0xff;
696 if ((status = card_send_command(ioaddr, name, Command2, st)))
700 Command3[3] = p & 0xff;
702 Command3[2] = p & 0xff;
703 if ((status = card_send_command(ioaddr, name, Command3, st)))
706 if ((status = card_send_command(ioaddr, name, Command4, st)))
708 return sb1000_end_get_set_command(ioaddr, name);
713 sb1000_print_status_buffer(const char* name, unsigned char st[],
714 unsigned char buffer[], int size)
718 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
719 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
720 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
721 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
722 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
723 buffer[46] << 8 | buffer[47],
724 buffer[42], buffer[43], buffer[44], buffer[45],
725 buffer[48] << 8 | buffer[49]);
727 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
728 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
729 for (j = 0; j < 8 && k < size; j++, k++)
730 printk(" %02x", buffer[k]);
738 * SB1000 commands for frame rx interrupt
740 /* receive a single frame and assemble datagram
741 * (this is the heart of the interrupt routine)
744 sb1000_rx(struct net_device *dev)
747 #define FRAMESIZE 184
748 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
751 unsigned int skbsize;
753 struct sb1000_private *lp = netdev_priv(dev);
754 struct net_device_stats *stats = &dev->stats;
756 /* SB1000 frame constants */
757 const int FrameSize = FRAMESIZE;
758 const int NewDatagramHeaderSkip = 8;
759 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
760 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
761 const int ContDatagramHeaderSkip = 7;
762 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
763 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
764 const int TrailerSize = 4;
766 ioaddr = dev->base_addr;
768 insw(ioaddr, (unsigned short*) st, 1);
770 printk("cm0: received: %02x %02x\n", st[0], st[1]);
771 #endif /* XXXDEBUG */
774 /* decide if it is a good or bad frame */
775 for (ns = 0; ns < NPIDS; ns++) {
776 session_id = lp->rx_session_id[ns];
777 frame_id = lp->rx_frame_id[ns];
778 if (st[0] == session_id) {
779 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
781 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
786 } else if (st[0] == (session_id | 0x40)) {
787 if ((st[1] & 0xf0) == 0x30) {
797 stats->rx_frame_errors++;
798 skb = lp->rx_skb[ns];
799 if (sb1000_debug > 1)
800 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
801 "expecting %02x %02x\n", dev->name, st[0], st[1],
802 skb ? session_id : session_id | 0x40, frame_id);
809 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
812 /* get data length */
813 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
815 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
816 #endif /* XXXDEBUG */
817 if (buffer[0] != NewDatagramHeaderSkip) {
818 if (sb1000_debug > 1)
819 printk(KERN_WARNING "%s: new datagram header skip error: "
820 "got %02x expecting %02x\n", dev->name, buffer[0],
821 NewDatagramHeaderSkip);
822 stats->rx_length_errors++;
823 insw(ioaddr, buffer, NewDatagramDataSize / 2);
826 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
827 buffer[NewDatagramHeaderSkip + 4]) - 17;
828 if (dlen > SB1000_MRU) {
829 if (sb1000_debug > 1)
830 printk(KERN_WARNING "%s: datagram length (%d) greater "
831 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
832 stats->rx_length_errors++;
833 insw(ioaddr, buffer, NewDatagramDataSize / 2);
836 lp->rx_dlen[ns] = dlen;
837 /* compute size to allocate for datagram */
838 skbsize = dlen + FrameSize;
839 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
840 if (sb1000_debug > 1)
841 printk(KERN_WARNING "%s: can't allocate %d bytes long "
842 "skbuff\n", dev->name, skbsize);
844 insw(ioaddr, buffer, NewDatagramDataSize / 2);
848 skb_reset_mac_header(skb);
849 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
850 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
851 NewDatagramDataSize / 2);
852 lp->rx_skb[ns] = skb;
854 /* continuation of previous datagram */
855 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
856 if (buffer[0] != ContDatagramHeaderSkip) {
857 if (sb1000_debug > 1)
858 printk(KERN_WARNING "%s: cont datagram header skip error: "
859 "got %02x expecting %02x\n", dev->name, buffer[0],
860 ContDatagramHeaderSkip);
861 stats->rx_length_errors++;
862 insw(ioaddr, buffer, ContDatagramDataSize / 2);
865 skb = lp->rx_skb[ns];
866 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
867 ContDatagramDataSize / 2);
868 dlen = lp->rx_dlen[ns];
870 if (skb->len < dlen + TrailerSize) {
871 lp->rx_session_id[ns] &= ~0x40;
875 /* datagram completed: send to upper level */
878 stats->rx_bytes+=dlen;
880 lp->rx_skb[ns] = NULL;
881 lp->rx_session_id[ns] |= 0x40;
885 insw(ioaddr, buffer, FrameSize / 2);
886 if (sb1000_debug > 1)
887 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
888 dev->name, st[0], st[1]);
889 stats->rx_frame_errors++;
891 if (sb1000_debug > 2)
892 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
896 if ((skb = lp->rx_skb[ns])) {
898 lp->rx_skb[ns] = NULL;
900 lp->rx_session_id[ns] |= 0x40;
906 sb1000_error_dpc(struct net_device *dev)
908 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
913 struct sb1000_private *lp = netdev_priv(dev);
914 const int ErrorDpcCounterInitialize = 200;
916 ioaddr[0] = dev->base_addr;
917 /* mem_start holds the second I/O address */
918 ioaddr[1] = dev->mem_start;
921 sb1000_wait_for_ready_clear(ioaddr, name);
922 sb1000_send_command(ioaddr, name, Command0);
923 sb1000_wait_for_ready(ioaddr, name);
924 sb1000_read_status(ioaddr, st);
926 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
932 * Linux interface functions
935 sb1000_open(struct net_device *dev)
938 int ioaddr[2], status;
939 struct sb1000_private *lp = netdev_priv(dev);
940 const unsigned short FirmwareVersion[] = {0x01, 0x01};
942 ioaddr[0] = dev->base_addr;
943 /* mem_start holds the second I/O address */
944 ioaddr[1] = dev->mem_start;
947 /* initialize sb1000 */
948 if ((status = sb1000_reset(ioaddr, name)))
951 if ((status = sb1000_check_CRC(ioaddr, name)))
954 /* initialize private data before board can catch interrupts */
955 lp->rx_skb[0] = NULL;
956 lp->rx_skb[1] = NULL;
957 lp->rx_skb[2] = NULL;
958 lp->rx_skb[3] = NULL;
964 lp->rx_error_count = 0;
965 lp->rx_error_dpc_count = 0;
966 lp->rx_session_id[0] = 0x50;
967 lp->rx_session_id[0] = 0x48;
968 lp->rx_session_id[0] = 0x44;
969 lp->rx_session_id[0] = 0x42;
970 lp->rx_frame_id[0] = 0;
971 lp->rx_frame_id[1] = 0;
972 lp->rx_frame_id[2] = 0;
973 lp->rx_frame_id[3] = 0;
974 if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
978 if (sb1000_debug > 2)
979 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
981 /* Activate board and check firmware version */
983 if ((status = sb1000_activate(ioaddr, name)))
986 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
988 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
989 printk(KERN_WARNING "%s: found firmware version %x.%02x "
990 "(should be %x.%02x)\n", name, version[0], version[1],
991 FirmwareVersion[0], FirmwareVersion[1]);
994 netif_start_queue(dev);
995 return 0; /* Always succeed */
998 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1001 unsigned char version[2];
1003 int ioaddr[2], status, frequency;
1004 unsigned int stats[5];
1005 struct sb1000_private *lp = netdev_priv(dev);
1007 if (!(dev && dev->flags & IFF_UP))
1010 ioaddr[0] = dev->base_addr;
1011 /* mem_start holds the second I/O address */
1012 ioaddr[1] = dev->mem_start;
1016 case SIOCGCMSTATS: /* get statistics */
1017 stats[0] = dev->stats.rx_bytes;
1018 stats[1] = lp->rx_frames;
1019 stats[2] = dev->stats.rx_packets;
1020 stats[3] = dev->stats.rx_errors;
1021 stats[4] = dev->stats.rx_dropped;
1022 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1027 case SIOCGCMFIRMWARE: /* get firmware version */
1028 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1030 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1034 case SIOCGCMFREQUENCY: /* get frequency */
1035 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1037 if(put_user(frequency, (int __user *) ifr->ifr_data))
1041 case SIOCSCMFREQUENCY: /* set frequency */
1042 if (!capable(CAP_NET_ADMIN))
1044 if(get_user(frequency, (int __user *) ifr->ifr_data))
1046 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1050 case SIOCGCMPIDS: /* get PIDs */
1051 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1053 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1057 case SIOCSCMPIDS: /* set PIDs */
1058 if (!capable(CAP_NET_ADMIN))
1060 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1062 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1064 /* set session_id, frame_id and pkt_type too */
1065 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1066 lp->rx_session_id[1] = 0x48;
1067 lp->rx_session_id[2] = 0x44;
1068 lp->rx_session_id[3] = 0x42;
1069 lp->rx_frame_id[0] = 0;
1070 lp->rx_frame_id[1] = 0;
1071 lp->rx_frame_id[2] = 0;
1072 lp->rx_frame_id[3] = 0;
1082 /* transmit function: do nothing since SB1000 can't send anything out */
1084 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1086 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1087 /* sb1000 can't xmit datagrams */
1092 /* SB1000 interrupt handler. */
1093 static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1095 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1096 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1101 struct net_device *dev = dev_id;
1102 struct sb1000_private *lp = netdev_priv(dev);
1104 const int MaxRxErrorCount = 6;
1106 ioaddr[0] = dev->base_addr;
1107 /* mem_start holds the second I/O address */
1108 ioaddr[1] = dev->mem_start;
1111 /* is it a good interrupt? */
1112 st = inb(ioaddr[1] + 6);
1113 if (!(st & 0x08 && st & 0x20)) {
1117 if (sb1000_debug > 3)
1118 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1120 st = inb(ioaddr[0] + 7);
1122 lp->rx_error_count++;
1124 udelay(SB1000_DELAY);
1125 #endif /* SB1000_DELAY */
1126 sb1000_issue_read_command(ioaddr, name);
1128 sb1000_error_dpc(dev);
1129 sb1000_issue_read_command(ioaddr, name);
1131 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1132 sb1000_wait_for_ready_clear(ioaddr, name);
1133 sb1000_send_command(ioaddr, name, Command0);
1134 sb1000_wait_for_ready(ioaddr, name);
1135 sb1000_issue_read_command(ioaddr, name);
1137 if (lp->rx_error_count >= MaxRxErrorCount) {
1138 sb1000_wait_for_ready_clear(ioaddr, name);
1139 sb1000_send_command(ioaddr, name, Command1);
1140 sb1000_wait_for_ready(ioaddr, name);
1141 sb1000_issue_read_command(ioaddr, name);
1142 lp->rx_error_count = 0;
1148 static int sb1000_close(struct net_device *dev)
1152 struct sb1000_private *lp = netdev_priv(dev);
1154 if (sb1000_debug > 2)
1155 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1157 netif_stop_queue(dev);
1159 ioaddr[0] = dev->base_addr;
1160 /* mem_start holds the second I/O address */
1161 ioaddr[1] = dev->mem_start;
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);
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]);
1178 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1179 MODULE_LICENSE("GPL");
1184 return pnp_register_driver(&sb1000_driver);
1190 pnp_unregister_driver(&sb1000_driver);
1193 module_init(sb1000_init);
1194 module_exit(sb1000_exit);