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/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 <linux/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_set_mac_address = eth_mac_addr,
145 .ndo_validate_addr = eth_validate_addr,
149 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
151 struct net_device *dev;
152 unsigned short ioaddr[2], irq;
153 unsigned int serial_number;
156 if (pnp_device_attach(pdev) < 0)
158 if (pnp_activate_dev(pdev) < 0)
161 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
163 if (!pnp_irq_valid(pdev, 0))
166 serial_number = pdev->card->serial;
168 ioaddr[0] = pnp_port_start(pdev, 0);
169 ioaddr[1] = pnp_port_start(pdev, 0);
171 irq = pnp_irq(pdev, 0);
173 if (!request_region(ioaddr[0], 16, "sb1000"))
175 if (!request_region(ioaddr[1], 16, "sb1000"))
176 goto out_release_region0;
178 dev = alloc_etherdev(sizeof(struct sb1000_private));
181 goto out_release_regions;
185 dev->base_addr = ioaddr[0];
186 /* mem_start holds the second I/O address */
187 dev->mem_start = ioaddr[1];
190 if (sb1000_debug > 0)
191 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
192 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
193 dev->mem_start, serial_number, dev->irq);
196 * The SB1000 is an rx-only cable modem device. The uplink is a modem
197 * and we do not want to arp on it.
199 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
201 SET_NETDEV_DEV(dev, &pdev->dev);
203 if (sb1000_debug > 0)
204 printk(KERN_NOTICE "%s", version);
206 dev->netdev_ops = &sb1000_netdev_ops;
208 /* hardware address is 0:0:serial_number */
209 dev->dev_addr[2] = serial_number >> 24 & 0xff;
210 dev->dev_addr[3] = serial_number >> 16 & 0xff;
211 dev->dev_addr[4] = serial_number >> 8 & 0xff;
212 dev->dev_addr[5] = serial_number >> 0 & 0xff;
214 pnp_set_drvdata(pdev, dev);
216 error = register_netdev(dev);
218 goto out_free_netdev;
224 release_region(ioaddr[1], 16);
226 release_region(ioaddr[0], 16);
228 pnp_disable_dev(pdev);
230 pnp_device_detach(pdev);
235 sb1000_remove_one(struct pnp_dev *pdev)
237 struct net_device *dev = pnp_get_drvdata(pdev);
239 unregister_netdev(dev);
240 release_region(dev->base_addr, 16);
241 release_region(dev->mem_start, 16);
245 static struct pnp_driver sb1000_driver = {
247 .id_table = sb1000_pnp_ids,
248 .probe = sb1000_probe_one,
249 .remove = sb1000_remove_one,
254 * SB1000 hardware routines to be used during open/configuration phases
257 static const int TimeOutJiffies = (875 * HZ) / 100;
259 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
261 card_wait_for_busy_clear(const int ioaddr[], const char* name)
264 unsigned long timeout;
266 a = inb(ioaddr[0] + 7);
267 timeout = jiffies + TimeOutJiffies;
268 while (a & 0x80 || a & 0x40) {
272 a = inb(ioaddr[0] + 7);
273 if (time_after_eq(jiffies, timeout)) {
274 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
283 /* Card Wait For Ready (cannot be used during an interrupt) */
285 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
288 unsigned long timeout;
290 a = inb(ioaddr[1] + 6);
291 timeout = jiffies + TimeOutJiffies;
292 while (a & 0x80 || !(a & 0x40)) {
296 a = inb(ioaddr[1] + 6);
297 if (time_after_eq(jiffies, timeout)) {
298 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
304 in[1] = inb(ioaddr[0] + 1);
305 in[2] = inb(ioaddr[0] + 2);
306 in[3] = inb(ioaddr[0] + 3);
307 in[4] = inb(ioaddr[0] + 4);
308 in[0] = inb(ioaddr[0] + 5);
309 in[6] = inb(ioaddr[0] + 6);
310 in[5] = inb(ioaddr[1] + 6);
314 /* Card Send Command (cannot be used during an interrupt) */
316 card_send_command(const int ioaddr[], const char* name,
317 const unsigned char out[], unsigned char in[])
321 if ((status = card_wait_for_busy_clear(ioaddr, name)))
323 outb(0xa0, ioaddr[0] + 6);
324 outb(out[2], ioaddr[0] + 1);
325 outb(out[3], ioaddr[0] + 2);
326 outb(out[4], ioaddr[0] + 3);
327 outb(out[5], ioaddr[0] + 4);
328 outb(out[1], ioaddr[0] + 5);
329 outb(0xa0, ioaddr[0] + 6);
330 outb(out[0], ioaddr[0] + 7);
331 if (out[0] != 0x20 && out[0] != 0x30) {
332 if ((status = card_wait_for_ready(ioaddr, name, in)))
335 if (sb1000_debug > 3)
336 printk(KERN_DEBUG "%s: card_send_command "
337 "out: %02x%02x%02x%02x%02x%02x "
338 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
339 out[0], out[1], out[2], out[3], out[4], out[5],
340 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
342 if (sb1000_debug > 3)
343 printk(KERN_DEBUG "%s: card_send_command "
344 "out: %02x%02x%02x%02x%02x%02x\n", name,
345 out[0], out[1], out[2], out[3], out[4], out[5]);
348 if (out[1] == 0x1b) {
349 x = (out[2] == 0x02);
351 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
359 * SB1000 hardware routines to be used during frame rx interrupt
361 static const int Sb1000TimeOutJiffies = 7 * HZ;
363 /* Card Wait For Ready (to be used during frame rx) */
365 sb1000_wait_for_ready(const int ioaddr[], const char* name)
367 unsigned long timeout;
369 timeout = jiffies + Sb1000TimeOutJiffies;
370 while (inb(ioaddr[1] + 6) & 0x80) {
371 if (time_after_eq(jiffies, timeout)) {
372 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
377 timeout = jiffies + Sb1000TimeOutJiffies;
378 while (!(inb(ioaddr[1] + 6) & 0x40)) {
379 if (time_after_eq(jiffies, timeout)) {
380 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
389 /* Card Wait For Ready Clear (to be used during frame rx) */
391 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
393 unsigned long timeout;
395 timeout = jiffies + Sb1000TimeOutJiffies;
396 while (inb(ioaddr[1] + 6) & 0x80) {
397 if (time_after_eq(jiffies, timeout)) {
398 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
403 timeout = jiffies + Sb1000TimeOutJiffies;
404 while (inb(ioaddr[1] + 6) & 0x40) {
405 if (time_after_eq(jiffies, timeout)) {
406 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
414 /* Card Send Command (to be used during frame rx) */
416 sb1000_send_command(const int ioaddr[], const char* name,
417 const unsigned char out[])
419 outb(out[2], ioaddr[0] + 1);
420 outb(out[3], ioaddr[0] + 2);
421 outb(out[4], ioaddr[0] + 3);
422 outb(out[5], ioaddr[0] + 4);
423 outb(out[1], ioaddr[0] + 5);
424 outb(out[0], ioaddr[0] + 7);
425 if (sb1000_debug > 3)
426 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
427 "%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);
441 /* Issue Read Command (to be used during frame rx) */
443 sb1000_issue_read_command(const int ioaddr[], const char* name)
445 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
447 sb1000_wait_for_ready_clear(ioaddr, name);
448 outb(0xa0, ioaddr[0] + 6);
449 sb1000_send_command(ioaddr, name, Command0);
454 * SB1000 commands for open/configuration
456 /* reset SB1000 card */
458 sb1000_reset(const int ioaddr[], const char* name)
460 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
465 port = ioaddr[1] + 6;
479 if ((status = card_send_command(ioaddr, name, Command0, st)))
486 /* check SB1000 firmware CRC */
488 sb1000_check_CRC(const int ioaddr[], const char* name)
490 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
496 if ((status = card_send_command(ioaddr, name, Command0, st)))
498 if (st[1] != st[3] || st[2] != st[4])
500 crc = st[1] << 8 | st[2];
505 sb1000_start_get_set_command(const int ioaddr[], const char* name)
507 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
511 return card_send_command(ioaddr, name, Command0, st);
515 sb1000_end_get_set_command(const int ioaddr[], const char* name)
517 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
518 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
523 if ((status = card_send_command(ioaddr, name, Command0, st)))
525 return card_send_command(ioaddr, name, Command1, st);
529 sb1000_activate(const int ioaddr[], const char* name)
531 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
532 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
538 status = card_send_command(ioaddr, name, Command0, st);
541 status = card_send_command(ioaddr, name, Command1, st);
545 status = sb1000_start_get_set_command(ioaddr, name);
551 return sb1000_start_get_set_command(ioaddr, name);
554 /* get SB1000 firmware version */
556 sb1000_get_firmware_version(const int ioaddr[], const char* name,
557 unsigned char version[], int do_end)
559 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
564 if ((status = sb1000_start_get_set_command(ioaddr, name)))
566 if ((status = card_send_command(ioaddr, name, Command0, st)))
573 return sb1000_end_get_set_command(ioaddr, name);
578 /* get SB1000 frequency */
580 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
582 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
588 if ((status = sb1000_start_get_set_command(ioaddr, name)))
590 if ((status = card_send_command(ioaddr, name, Command0, st)))
592 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
593 return sb1000_end_get_set_command(ioaddr, name);
596 /* set SB1000 frequency */
598 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
602 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
604 const int FrequencyLowerLimit = 57000;
605 const int FrequencyUpperLimit = 804000;
607 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
608 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
609 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
610 FrequencyUpperLimit);
614 if ((status = sb1000_start_get_set_command(ioaddr, name)))
616 Command0[5] = frequency & 0xff;
618 Command0[4] = frequency & 0xff;
620 Command0[3] = frequency & 0xff;
622 Command0[2] = frequency & 0xff;
623 return card_send_command(ioaddr, name, Command0, st);
626 /* get SB1000 PIDs */
628 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
630 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
631 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
632 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
633 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
639 if ((status = sb1000_start_get_set_command(ioaddr, name)))
642 if ((status = card_send_command(ioaddr, name, Command0, st)))
644 PID[0] = st[1] << 8 | st[2];
646 if ((status = card_send_command(ioaddr, name, Command1, st)))
648 PID[1] = st[1] << 8 | st[2];
650 if ((status = card_send_command(ioaddr, name, Command2, st)))
652 PID[2] = st[1] << 8 | st[2];
654 if ((status = card_send_command(ioaddr, name, Command3, st)))
656 PID[3] = st[1] << 8 | st[2];
658 return sb1000_end_get_set_command(ioaddr, name);
661 /* set SB1000 PIDs */
663 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
665 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
670 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
671 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
672 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
673 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
676 if ((status = sb1000_start_get_set_command(ioaddr, name)))
680 Command0[3] = p & 0xff;
682 Command0[2] = p & 0xff;
683 if ((status = card_send_command(ioaddr, name, Command0, st)))
687 Command1[3] = p & 0xff;
689 Command1[2] = p & 0xff;
690 if ((status = card_send_command(ioaddr, name, Command1, st)))
694 Command2[3] = p & 0xff;
696 Command2[2] = p & 0xff;
697 if ((status = card_send_command(ioaddr, name, Command2, st)))
701 Command3[3] = p & 0xff;
703 Command3[2] = p & 0xff;
704 if ((status = card_send_command(ioaddr, name, Command3, st)))
707 if ((status = card_send_command(ioaddr, name, Command4, st)))
709 return sb1000_end_get_set_command(ioaddr, name);
714 sb1000_print_status_buffer(const char* name, unsigned char st[],
715 unsigned char buffer[], int size)
719 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
720 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
721 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
722 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
723 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
724 buffer[46] << 8 | buffer[47],
725 buffer[42], buffer[43], buffer[44], buffer[45],
726 buffer[48] << 8 | buffer[49]);
728 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
729 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
730 for (j = 0; j < 8 && k < size; j++, k++)
731 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;
931 * Linux interface functions
934 sb1000_open(struct net_device *dev)
937 int ioaddr[2], status;
938 struct sb1000_private *lp = netdev_priv(dev);
939 const unsigned short FirmwareVersion[] = {0x01, 0x01};
941 ioaddr[0] = dev->base_addr;
942 /* mem_start holds the second I/O address */
943 ioaddr[1] = dev->mem_start;
946 /* initialize sb1000 */
947 if ((status = sb1000_reset(ioaddr, name)))
950 if ((status = sb1000_check_CRC(ioaddr, name)))
953 /* initialize private data before board can catch interrupts */
954 lp->rx_skb[0] = NULL;
955 lp->rx_skb[1] = NULL;
956 lp->rx_skb[2] = NULL;
957 lp->rx_skb[3] = NULL;
963 lp->rx_error_count = 0;
964 lp->rx_error_dpc_count = 0;
965 lp->rx_session_id[0] = 0x50;
966 lp->rx_session_id[1] = 0x48;
967 lp->rx_session_id[2] = 0x44;
968 lp->rx_session_id[3] = 0x42;
969 lp->rx_frame_id[0] = 0;
970 lp->rx_frame_id[1] = 0;
971 lp->rx_frame_id[2] = 0;
972 lp->rx_frame_id[3] = 0;
973 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) {
977 if (sb1000_debug > 2)
978 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
980 /* Activate board and check firmware version */
982 if ((status = sb1000_activate(ioaddr, name)))
985 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
987 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
988 printk(KERN_WARNING "%s: found firmware version %x.%02x "
989 "(should be %x.%02x)\n", name, version[0], version[1],
990 FirmwareVersion[0], FirmwareVersion[1]);
993 netif_start_queue(dev);
994 return 0; /* Always succeed */
997 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1000 unsigned char version[2];
1002 int ioaddr[2], status, frequency;
1003 unsigned int stats[5];
1004 struct sb1000_private *lp = netdev_priv(dev);
1006 if (!(dev && dev->flags & IFF_UP))
1009 ioaddr[0] = dev->base_addr;
1010 /* mem_start holds the second I/O address */
1011 ioaddr[1] = dev->mem_start;
1015 case SIOCGCMSTATS: /* get statistics */
1016 stats[0] = dev->stats.rx_bytes;
1017 stats[1] = lp->rx_frames;
1018 stats[2] = dev->stats.rx_packets;
1019 stats[3] = dev->stats.rx_errors;
1020 stats[4] = dev->stats.rx_dropped;
1021 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1026 case SIOCGCMFIRMWARE: /* get firmware version */
1027 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1029 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1033 case SIOCGCMFREQUENCY: /* get frequency */
1034 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1036 if(put_user(frequency, (int __user *) ifr->ifr_data))
1040 case SIOCSCMFREQUENCY: /* set frequency */
1041 if (!capable(CAP_NET_ADMIN))
1043 if(get_user(frequency, (int __user *) ifr->ifr_data))
1045 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1049 case SIOCGCMPIDS: /* get PIDs */
1050 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1052 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1056 case SIOCSCMPIDS: /* set PIDs */
1057 if (!capable(CAP_NET_ADMIN))
1059 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1061 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1063 /* set session_id, frame_id and pkt_type too */
1064 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1065 lp->rx_session_id[1] = 0x48;
1066 lp->rx_session_id[2] = 0x44;
1067 lp->rx_session_id[3] = 0x42;
1068 lp->rx_frame_id[0] = 0;
1069 lp->rx_frame_id[1] = 0;
1070 lp->rx_frame_id[2] = 0;
1071 lp->rx_frame_id[3] = 0;
1081 /* transmit function: do nothing since SB1000 can't send anything out */
1083 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1085 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1086 /* sb1000 can't xmit datagrams */
1088 return NETDEV_TX_OK;
1091 /* SB1000 interrupt handler. */
1092 static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1094 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1095 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1100 struct net_device *dev = dev_id;
1101 struct sb1000_private *lp = netdev_priv(dev);
1103 const int MaxRxErrorCount = 6;
1105 ioaddr[0] = dev->base_addr;
1106 /* mem_start holds the second I/O address */
1107 ioaddr[1] = dev->mem_start;
1110 /* is it a good interrupt? */
1111 st = inb(ioaddr[1] + 6);
1112 if (!(st & 0x08 && st & 0x20)) {
1116 if (sb1000_debug > 3)
1117 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1119 st = inb(ioaddr[0] + 7);
1121 lp->rx_error_count++;
1123 udelay(SB1000_DELAY);
1124 #endif /* SB1000_DELAY */
1125 sb1000_issue_read_command(ioaddr, name);
1127 sb1000_error_dpc(dev);
1128 sb1000_issue_read_command(ioaddr, name);
1130 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1131 sb1000_wait_for_ready_clear(ioaddr, name);
1132 sb1000_send_command(ioaddr, name, Command0);
1133 sb1000_wait_for_ready(ioaddr, name);
1134 sb1000_issue_read_command(ioaddr, name);
1136 if (lp->rx_error_count >= MaxRxErrorCount) {
1137 sb1000_wait_for_ready_clear(ioaddr, name);
1138 sb1000_send_command(ioaddr, name, Command1);
1139 sb1000_wait_for_ready(ioaddr, name);
1140 sb1000_issue_read_command(ioaddr, name);
1141 lp->rx_error_count = 0;
1147 static int sb1000_close(struct net_device *dev)
1151 struct sb1000_private *lp = netdev_priv(dev);
1153 if (sb1000_debug > 2)
1154 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1156 netif_stop_queue(dev);
1158 ioaddr[0] = dev->base_addr;
1159 /* mem_start holds the second I/O address */
1160 ioaddr[1] = dev->mem_start;
1162 free_irq(dev->irq, dev);
1163 /* If we don't do this, we can't re-insmod it later. */
1164 release_region(ioaddr[1], SB1000_IO_EXTENT);
1165 release_region(ioaddr[0], SB1000_IO_EXTENT);
1167 /* free rx_skb's if needed */
1168 for (i=0; i<4; i++) {
1169 if (lp->rx_skb[i]) {
1170 dev_kfree_skb(lp->rx_skb[i]);
1177 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1178 MODULE_LICENSE("GPL");
1180 module_pnp_driver(sb1000_driver);