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/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 inline int card_wait_for_busy_clear(const int ioaddr[],
93 static inline 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 inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
100 static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
102 static inline void sb1000_send_command(const int ioaddr[], const char* name,
103 const unsigned char out[]);
104 static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
105 static inline void sb1000_issue_read_command(const int ioaddr[],
108 /* SB1000 commands for open/configuration */
109 static inline int sb1000_reset(const int ioaddr[], const char* name);
110 static inline int sb1000_check_CRC(const int ioaddr[], const char* name);
111 static inline int sb1000_start_get_set_command(const int ioaddr[],
113 static inline int sb1000_end_get_set_command(const int ioaddr[],
115 static inline 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 inline int sb1000_rx(struct net_device *dev);
129 static inline 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);
138 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
140 struct net_device *dev;
141 unsigned short ioaddr[2], irq;
142 unsigned int serial_number;
145 if (pnp_device_attach(pdev) < 0)
147 if (pnp_activate_dev(pdev) < 0)
150 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
152 if (!pnp_irq_valid(pdev, 0))
155 serial_number = pdev->card->serial;
157 ioaddr[0] = pnp_port_start(pdev, 0);
158 ioaddr[1] = pnp_port_start(pdev, 0);
160 irq = pnp_irq(pdev, 0);
162 if (!request_region(ioaddr[0], 16, "sb1000"))
164 if (!request_region(ioaddr[1], 16, "sb1000"))
165 goto out_release_region0;
167 dev = alloc_etherdev(sizeof(struct sb1000_private));
170 goto out_release_regions;
174 dev->base_addr = ioaddr[0];
175 /* mem_start holds the second I/O address */
176 dev->mem_start = ioaddr[1];
179 if (sb1000_debug > 0)
180 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
181 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
182 dev->mem_start, serial_number, dev->irq);
185 * The SB1000 is an rx-only cable modem device. The uplink is a modem
186 * and we do not want to arp on it.
188 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
190 SET_NETDEV_DEV(dev, &pdev->dev);
192 if (sb1000_debug > 0)
193 printk(KERN_NOTICE "%s", version);
195 /* The SB1000-specific entries in the device structure. */
196 dev->open = sb1000_open;
197 dev->do_ioctl = sb1000_dev_ioctl;
198 dev->hard_start_xmit = sb1000_start_xmit;
199 dev->stop = sb1000_close;
201 /* hardware address is 0:0:serial_number */
202 dev->dev_addr[2] = serial_number >> 24 & 0xff;
203 dev->dev_addr[3] = serial_number >> 16 & 0xff;
204 dev->dev_addr[4] = serial_number >> 8 & 0xff;
205 dev->dev_addr[5] = serial_number >> 0 & 0xff;
207 pnp_set_drvdata(pdev, dev);
209 error = register_netdev(dev);
211 goto out_free_netdev;
217 release_region(ioaddr[1], 16);
219 release_region(ioaddr[0], 16);
221 pnp_disable_dev(pdev);
223 pnp_device_detach(pdev);
228 sb1000_remove_one(struct pnp_dev *pdev)
230 struct net_device *dev = pnp_get_drvdata(pdev);
232 unregister_netdev(dev);
233 release_region(dev->base_addr, 16);
234 release_region(dev->mem_start, 16);
238 static struct pnp_driver sb1000_driver = {
240 .id_table = sb1000_pnp_ids,
241 .probe = sb1000_probe_one,
242 .remove = sb1000_remove_one,
247 * SB1000 hardware routines to be used during open/configuration phases
250 static const int TimeOutJiffies = (875 * HZ) / 100;
252 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
254 card_wait_for_busy_clear(const int ioaddr[], const char* name)
257 unsigned long timeout;
259 a = inb(ioaddr[0] + 7);
260 timeout = jiffies + TimeOutJiffies;
261 while (a & 0x80 || a & 0x40) {
265 a = inb(ioaddr[0] + 7);
266 if (time_after_eq(jiffies, timeout)) {
267 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
276 /* Card Wait For Ready (cannot be used during an interrupt) */
278 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
281 unsigned long timeout;
283 a = inb(ioaddr[1] + 6);
284 timeout = jiffies + TimeOutJiffies;
285 while (a & 0x80 || !(a & 0x40)) {
289 a = inb(ioaddr[1] + 6);
290 if (time_after_eq(jiffies, timeout)) {
291 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
297 in[1] = inb(ioaddr[0] + 1);
298 in[2] = inb(ioaddr[0] + 2);
299 in[3] = inb(ioaddr[0] + 3);
300 in[4] = inb(ioaddr[0] + 4);
301 in[0] = inb(ioaddr[0] + 5);
302 in[6] = inb(ioaddr[0] + 6);
303 in[5] = inb(ioaddr[1] + 6);
307 /* Card Send Command (cannot be used during an interrupt) */
309 card_send_command(const int ioaddr[], const char* name,
310 const unsigned char out[], unsigned char in[])
314 if ((status = card_wait_for_busy_clear(ioaddr, name)))
316 outb(0xa0, ioaddr[0] + 6);
317 outb(out[2], ioaddr[0] + 1);
318 outb(out[3], ioaddr[0] + 2);
319 outb(out[4], ioaddr[0] + 3);
320 outb(out[5], ioaddr[0] + 4);
321 outb(out[1], ioaddr[0] + 5);
322 outb(0xa0, ioaddr[0] + 6);
323 outb(out[0], ioaddr[0] + 7);
324 if (out[0] != 0x20 && out[0] != 0x30) {
325 if ((status = card_wait_for_ready(ioaddr, name, in)))
328 if (sb1000_debug > 3)
329 printk(KERN_DEBUG "%s: card_send_command "
330 "out: %02x%02x%02x%02x%02x%02x "
331 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
332 out[0], out[1], out[2], out[3], out[4], out[5],
333 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
335 if (sb1000_debug > 3)
336 printk(KERN_DEBUG "%s: card_send_command "
337 "out: %02x%02x%02x%02x%02x%02x\n", name,
338 out[0], out[1], out[2], out[3], out[4], out[5]);
341 if (out[1] == 0x1b) {
342 x = (out[2] == 0x02);
344 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
352 * SB1000 hardware routines to be used during frame rx interrupt
354 static const int Sb1000TimeOutJiffies = 7 * HZ;
356 /* Card Wait For Ready (to be used during frame rx) */
358 sb1000_wait_for_ready(const int ioaddr[], const char* name)
360 unsigned long timeout;
362 timeout = jiffies + Sb1000TimeOutJiffies;
363 while (inb(ioaddr[1] + 6) & 0x80) {
364 if (time_after_eq(jiffies, timeout)) {
365 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
370 timeout = jiffies + Sb1000TimeOutJiffies;
371 while (!(inb(ioaddr[1] + 6) & 0x40)) {
372 if (time_after_eq(jiffies, timeout)) {
373 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
382 /* Card Wait For Ready Clear (to be used during frame rx) */
384 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
386 unsigned long timeout;
388 timeout = jiffies + Sb1000TimeOutJiffies;
389 while (inb(ioaddr[1] + 6) & 0x80) {
390 if (time_after_eq(jiffies, timeout)) {
391 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
396 timeout = jiffies + Sb1000TimeOutJiffies;
397 while (inb(ioaddr[1] + 6) & 0x40) {
398 if (time_after_eq(jiffies, timeout)) {
399 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
407 /* Card Send Command (to be used during frame rx) */
409 sb1000_send_command(const int ioaddr[], const char* name,
410 const unsigned char out[])
412 outb(out[2], ioaddr[0] + 1);
413 outb(out[3], ioaddr[0] + 2);
414 outb(out[4], ioaddr[0] + 3);
415 outb(out[5], ioaddr[0] + 4);
416 outb(out[1], ioaddr[0] + 5);
417 outb(out[0], ioaddr[0] + 7);
418 if (sb1000_debug > 3)
419 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
420 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
424 /* Card Read Status (to be used during frame rx) */
426 sb1000_read_status(const int ioaddr[], unsigned char in[])
428 in[1] = inb(ioaddr[0] + 1);
429 in[2] = inb(ioaddr[0] + 2);
430 in[3] = inb(ioaddr[0] + 3);
431 in[4] = inb(ioaddr[0] + 4);
432 in[0] = inb(ioaddr[0] + 5);
436 /* Issue Read Command (to be used during frame rx) */
438 sb1000_issue_read_command(const int ioaddr[], const char* name)
440 const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
442 sb1000_wait_for_ready_clear(ioaddr, name);
443 outb(0xa0, ioaddr[0] + 6);
444 sb1000_send_command(ioaddr, name, Command0);
450 * SB1000 commands for open/configuration
452 /* reset SB1000 card */
454 sb1000_reset(const int ioaddr[], const char* name)
458 const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
460 port = ioaddr[1] + 6;
474 if ((status = card_send_command(ioaddr, name, Command0, st)))
481 /* check SB1000 firmware CRC */
483 sb1000_check_CRC(const int ioaddr[], const char* name)
487 const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
490 if ((status = card_send_command(ioaddr, name, Command0, st)))
492 if (st[1] != st[3] || st[2] != st[4])
494 crc = st[1] << 8 | st[2];
499 sb1000_start_get_set_command(const int ioaddr[], const char* name)
502 const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
504 return card_send_command(ioaddr, name, Command0, st);
508 sb1000_end_get_set_command(const int ioaddr[], const char* name)
512 const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
513 const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
515 if ((status = card_send_command(ioaddr, name, Command0, st)))
517 return card_send_command(ioaddr, name, Command1, st);
521 sb1000_activate(const int ioaddr[], const char* name)
525 const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
526 const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
529 if ((status = card_send_command(ioaddr, name, Command0, st)))
531 if ((status = card_send_command(ioaddr, name, Command1, st)))
534 if ((status = sb1000_start_get_set_command(ioaddr, name)))
539 return sb1000_start_get_set_command(ioaddr, name);
542 /* get SB1000 firmware version */
544 sb1000_get_firmware_version(const int ioaddr[], const char* name,
545 unsigned char version[], int do_end)
549 const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
551 if ((status = sb1000_start_get_set_command(ioaddr, name)))
553 if ((status = card_send_command(ioaddr, name, Command0, st)))
560 return sb1000_end_get_set_command(ioaddr, name);
565 /* get SB1000 frequency */
567 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
571 const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
574 if ((status = sb1000_start_get_set_command(ioaddr, name)))
576 if ((status = card_send_command(ioaddr, name, Command0, st)))
578 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
579 return sb1000_end_get_set_command(ioaddr, name);
582 /* set SB1000 frequency */
584 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
588 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
590 const int FrequencyLowerLimit = 57000;
591 const int FrequencyUpperLimit = 804000;
593 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
594 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
595 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
596 FrequencyUpperLimit);
600 if ((status = sb1000_start_get_set_command(ioaddr, name)))
602 Command0[5] = frequency & 0xff;
604 Command0[4] = frequency & 0xff;
606 Command0[3] = frequency & 0xff;
608 Command0[2] = frequency & 0xff;
609 return card_send_command(ioaddr, name, Command0, st);
612 /* get SB1000 PIDs */
614 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
618 const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
619 const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
620 const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
621 const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
624 if ((status = sb1000_start_get_set_command(ioaddr, name)))
627 if ((status = card_send_command(ioaddr, name, Command0, st)))
629 PID[0] = st[1] << 8 | st[2];
631 if ((status = card_send_command(ioaddr, name, Command1, st)))
633 PID[1] = st[1] << 8 | st[2];
635 if ((status = card_send_command(ioaddr, name, Command2, st)))
637 PID[2] = st[1] << 8 | st[2];
639 if ((status = card_send_command(ioaddr, name, Command3, st)))
641 PID[3] = st[1] << 8 | st[2];
643 return sb1000_end_get_set_command(ioaddr, name);
646 /* set SB1000 PIDs */
648 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
653 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
654 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
655 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
656 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
657 const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
660 if ((status = sb1000_start_get_set_command(ioaddr, name)))
664 Command0[3] = p & 0xff;
666 Command0[2] = p & 0xff;
667 if ((status = card_send_command(ioaddr, name, Command0, st)))
671 Command1[3] = p & 0xff;
673 Command1[2] = p & 0xff;
674 if ((status = card_send_command(ioaddr, name, Command1, st)))
678 Command2[3] = p & 0xff;
680 Command2[2] = p & 0xff;
681 if ((status = card_send_command(ioaddr, name, Command2, st)))
685 Command3[3] = p & 0xff;
687 Command3[2] = p & 0xff;
688 if ((status = card_send_command(ioaddr, name, Command3, st)))
691 if ((status = card_send_command(ioaddr, name, Command4, st)))
693 return sb1000_end_get_set_command(ioaddr, name);
698 sb1000_print_status_buffer(const char* name, unsigned char st[],
699 unsigned char buffer[], int size)
703 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
704 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
705 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
706 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
707 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
708 buffer[46] << 8 | buffer[47],
709 buffer[42], buffer[43], buffer[44], buffer[45],
710 buffer[48] << 8 | buffer[49]);
712 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
713 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
714 for (j = 0; j < 8 && k < size; j++, k++)
715 printk(" %02x", buffer[k]);
723 * SB1000 commands for frame rx interrupt
725 /* receive a single frame and assemble datagram
726 * (this is the heart of the interrupt routine)
729 sb1000_rx(struct net_device *dev)
732 #define FRAMESIZE 184
733 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
736 unsigned int skbsize;
738 struct sb1000_private *lp = netdev_priv(dev);
739 struct net_device_stats *stats = &dev->stats;
741 /* SB1000 frame constants */
742 const int FrameSize = FRAMESIZE;
743 const int NewDatagramHeaderSkip = 8;
744 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
745 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
746 const int ContDatagramHeaderSkip = 7;
747 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
748 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
749 const int TrailerSize = 4;
751 ioaddr = dev->base_addr;
753 insw(ioaddr, (unsigned short*) st, 1);
755 printk("cm0: received: %02x %02x\n", st[0], st[1]);
756 #endif /* XXXDEBUG */
759 /* decide if it is a good or bad frame */
760 for (ns = 0; ns < NPIDS; ns++) {
761 session_id = lp->rx_session_id[ns];
762 frame_id = lp->rx_frame_id[ns];
763 if (st[0] == session_id) {
764 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
766 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
771 } else if (st[0] == (session_id | 0x40)) {
772 if ((st[1] & 0xf0) == 0x30) {
782 stats->rx_frame_errors++;
783 skb = lp->rx_skb[ns];
784 if (sb1000_debug > 1)
785 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
786 "expecting %02x %02x\n", dev->name, st[0], st[1],
787 skb ? session_id : session_id | 0x40, frame_id);
794 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
797 /* get data length */
798 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
800 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
801 #endif /* XXXDEBUG */
802 if (buffer[0] != NewDatagramHeaderSkip) {
803 if (sb1000_debug > 1)
804 printk(KERN_WARNING "%s: new datagram header skip error: "
805 "got %02x expecting %02x\n", dev->name, buffer[0],
806 NewDatagramHeaderSkip);
807 stats->rx_length_errors++;
808 insw(ioaddr, buffer, NewDatagramDataSize / 2);
811 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
812 buffer[NewDatagramHeaderSkip + 4]) - 17;
813 if (dlen > SB1000_MRU) {
814 if (sb1000_debug > 1)
815 printk(KERN_WARNING "%s: datagram length (%d) greater "
816 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
817 stats->rx_length_errors++;
818 insw(ioaddr, buffer, NewDatagramDataSize / 2);
821 lp->rx_dlen[ns] = dlen;
822 /* compute size to allocate for datagram */
823 skbsize = dlen + FrameSize;
824 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
825 if (sb1000_debug > 1)
826 printk(KERN_WARNING "%s: can't allocate %d bytes long "
827 "skbuff\n", dev->name, skbsize);
829 insw(ioaddr, buffer, NewDatagramDataSize / 2);
833 skb_reset_mac_header(skb);
834 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
835 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
836 NewDatagramDataSize / 2);
837 lp->rx_skb[ns] = skb;
839 /* continuation of previous datagram */
840 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
841 if (buffer[0] != ContDatagramHeaderSkip) {
842 if (sb1000_debug > 1)
843 printk(KERN_WARNING "%s: cont datagram header skip error: "
844 "got %02x expecting %02x\n", dev->name, buffer[0],
845 ContDatagramHeaderSkip);
846 stats->rx_length_errors++;
847 insw(ioaddr, buffer, ContDatagramDataSize / 2);
850 skb = lp->rx_skb[ns];
851 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
852 ContDatagramDataSize / 2);
853 dlen = lp->rx_dlen[ns];
855 if (skb->len < dlen + TrailerSize) {
856 lp->rx_session_id[ns] &= ~0x40;
860 /* datagram completed: send to upper level */
863 dev->last_rx = jiffies;
864 stats->rx_bytes+=dlen;
866 lp->rx_skb[ns] = NULL;
867 lp->rx_session_id[ns] |= 0x40;
871 insw(ioaddr, buffer, FrameSize / 2);
872 if (sb1000_debug > 1)
873 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
874 dev->name, st[0], st[1]);
875 stats->rx_frame_errors++;
877 if (sb1000_debug > 2)
878 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
882 if ((skb = lp->rx_skb[ns])) {
884 lp->rx_skb[ns] = NULL;
886 lp->rx_session_id[ns] |= 0x40;
892 sb1000_error_dpc(struct net_device *dev)
897 struct sb1000_private *lp = netdev_priv(dev);
898 const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
899 const int ErrorDpcCounterInitialize = 200;
901 ioaddr[0] = dev->base_addr;
902 /* mem_start holds the second I/O address */
903 ioaddr[1] = dev->mem_start;
906 sb1000_wait_for_ready_clear(ioaddr, name);
907 sb1000_send_command(ioaddr, name, Command0);
908 sb1000_wait_for_ready(ioaddr, name);
909 sb1000_read_status(ioaddr, st);
911 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
917 * Linux interface functions
920 sb1000_open(struct net_device *dev)
923 int ioaddr[2], status;
924 struct sb1000_private *lp = netdev_priv(dev);
925 const unsigned short FirmwareVersion[] = {0x01, 0x01};
927 ioaddr[0] = dev->base_addr;
928 /* mem_start holds the second I/O address */
929 ioaddr[1] = dev->mem_start;
932 /* initialize sb1000 */
933 if ((status = sb1000_reset(ioaddr, name)))
936 if ((status = sb1000_check_CRC(ioaddr, name)))
939 /* initialize private data before board can catch interrupts */
940 lp->rx_skb[0] = NULL;
941 lp->rx_skb[1] = NULL;
942 lp->rx_skb[2] = NULL;
943 lp->rx_skb[3] = NULL;
949 lp->rx_error_count = 0;
950 lp->rx_error_dpc_count = 0;
951 lp->rx_session_id[0] = 0x50;
952 lp->rx_session_id[0] = 0x48;
953 lp->rx_session_id[0] = 0x44;
954 lp->rx_session_id[0] = 0x42;
955 lp->rx_frame_id[0] = 0;
956 lp->rx_frame_id[1] = 0;
957 lp->rx_frame_id[2] = 0;
958 lp->rx_frame_id[3] = 0;
959 if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
963 if (sb1000_debug > 2)
964 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
966 /* Activate board and check firmware version */
968 if ((status = sb1000_activate(ioaddr, name)))
971 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
973 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
974 printk(KERN_WARNING "%s: found firmware version %x.%02x "
975 "(should be %x.%02x)\n", name, version[0], version[1],
976 FirmwareVersion[0], FirmwareVersion[1]);
979 netif_start_queue(dev);
980 return 0; /* Always succeed */
983 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
986 unsigned char version[2];
988 int ioaddr[2], status, frequency;
989 unsigned int stats[5];
990 struct sb1000_private *lp = netdev_priv(dev);
992 if (!(dev && dev->flags & IFF_UP))
995 ioaddr[0] = dev->base_addr;
996 /* mem_start holds the second I/O address */
997 ioaddr[1] = dev->mem_start;
1001 case SIOCGCMSTATS: /* get statistics */
1002 stats[0] = dev->stats.rx_bytes;
1003 stats[1] = lp->rx_frames;
1004 stats[2] = dev->stats.rx_packets;
1005 stats[3] = dev->stats.rx_errors;
1006 stats[4] = dev->stats.rx_dropped;
1007 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1012 case SIOCGCMFIRMWARE: /* get firmware version */
1013 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1015 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1019 case SIOCGCMFREQUENCY: /* get frequency */
1020 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1022 if(put_user(frequency, (int __user *) ifr->ifr_data))
1026 case SIOCSCMFREQUENCY: /* set frequency */
1027 if (!capable(CAP_NET_ADMIN))
1029 if(get_user(frequency, (int __user *) ifr->ifr_data))
1031 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1035 case SIOCGCMPIDS: /* get PIDs */
1036 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1038 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1042 case SIOCSCMPIDS: /* set PIDs */
1043 if (!capable(CAP_NET_ADMIN))
1045 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1047 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1049 /* set session_id, frame_id and pkt_type too */
1050 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1051 lp->rx_session_id[1] = 0x48;
1052 lp->rx_session_id[2] = 0x44;
1053 lp->rx_session_id[3] = 0x42;
1054 lp->rx_frame_id[0] = 0;
1055 lp->rx_frame_id[1] = 0;
1056 lp->rx_frame_id[2] = 0;
1057 lp->rx_frame_id[3] = 0;
1067 /* transmit function: do nothing since SB1000 can't send anything out */
1069 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1071 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1072 /* sb1000 can't xmit datagrams */
1077 /* SB1000 interrupt handler. */
1078 static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1083 struct net_device *dev = dev_id;
1084 struct sb1000_private *lp = netdev_priv(dev);
1086 const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1087 const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1088 const int MaxRxErrorCount = 6;
1090 ioaddr[0] = dev->base_addr;
1091 /* mem_start holds the second I/O address */
1092 ioaddr[1] = dev->mem_start;
1095 /* is it a good interrupt? */
1096 st = inb(ioaddr[1] + 6);
1097 if (!(st & 0x08 && st & 0x20)) {
1101 if (sb1000_debug > 3)
1102 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1104 st = inb(ioaddr[0] + 7);
1106 lp->rx_error_count++;
1108 udelay(SB1000_DELAY);
1109 #endif /* SB1000_DELAY */
1110 sb1000_issue_read_command(ioaddr, name);
1112 sb1000_error_dpc(dev);
1113 sb1000_issue_read_command(ioaddr, name);
1115 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1116 sb1000_wait_for_ready_clear(ioaddr, name);
1117 sb1000_send_command(ioaddr, name, Command0);
1118 sb1000_wait_for_ready(ioaddr, name);
1119 sb1000_issue_read_command(ioaddr, name);
1121 if (lp->rx_error_count >= MaxRxErrorCount) {
1122 sb1000_wait_for_ready_clear(ioaddr, name);
1123 sb1000_send_command(ioaddr, name, Command1);
1124 sb1000_wait_for_ready(ioaddr, name);
1125 sb1000_issue_read_command(ioaddr, name);
1126 lp->rx_error_count = 0;
1132 static int sb1000_close(struct net_device *dev)
1136 struct sb1000_private *lp = netdev_priv(dev);
1138 if (sb1000_debug > 2)
1139 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1141 netif_stop_queue(dev);
1143 ioaddr[0] = dev->base_addr;
1144 /* mem_start holds the second I/O address */
1145 ioaddr[1] = dev->mem_start;
1147 free_irq(dev->irq, dev);
1148 /* If we don't do this, we can't re-insmod it later. */
1149 release_region(ioaddr[1], SB1000_IO_EXTENT);
1150 release_region(ioaddr[0], SB1000_IO_EXTENT);
1152 /* free rx_skb's if needed */
1153 for (i=0; i<4; i++) {
1154 if (lp->rx_skb[i]) {
1155 dev_kfree_skb(lp->rx_skb[i]);
1161 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1162 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1163 MODULE_LICENSE("GPL");
1168 return pnp_register_driver(&sb1000_driver);
1174 pnp_unregister_driver(&sb1000_driver);
1177 module_init(sb1000_init);
1178 module_exit(sb1000_exit);