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wan/hdlc_x25.c: fix a NULL dereference
[deliverable/linux.git] / drivers / net / usb / hso.c
CommitLineData
72dc1c09
GKH		 1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
7 * <ajb@spheresystems.co.uk>
8 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
9 * Copyright (C) 2008 Novell, Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
23 * USA
24 *
25 *
26 *****************************************************************************/
27
28/******************************************************************************
29 *
30 * Description of the device:
31 *
32 * Interface 0: Contains the IP network interface on the bulk end points.
33 * The multiplexed serial ports are using the interrupt and
34 * control endpoints.
35 * Interrupt contains a bitmap telling which multiplexed
36 * serialport needs servicing.
37 *
38 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
39 * port is opened, as this have a huge impact on the network port
40 * throughput.
41 *
42 * Interface 2: Standard modem interface - circuit switched interface, should
43 * not be used.
44 *
45 *****************************************************************************/
46
47#include <linux/sched.h>
48#include <linux/slab.h>
49#include <linux/init.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/module.h>
53#include <linux/ethtool.h>
54#include <linux/usb.h>
55#include <linux/timer.h>
56#include <linux/tty.h>
57#include <linux/tty_driver.h>
58#include <linux/tty_flip.h>
59#include <linux/kmod.h>
60#include <linux/rfkill.h>
61#include <linux/ip.h>
62#include <linux/uaccess.h>
63#include <linux/usb/cdc.h>
64#include <net/arp.h>
65#include <asm/byteorder.h>
66
67
68#define DRIVER_VERSION "1.2"
69#define MOD_AUTHOR "Option Wireless"
70#define MOD_DESCRIPTION "USB High Speed Option driver"
71#define MOD_LICENSE "GPL"
72
73#define HSO_MAX_NET_DEVICES 10
74#define HSO__MAX_MTU 2048
75#define DEFAULT_MTU 1500
76#define DEFAULT_MRU 1500
77
78#define CTRL_URB_RX_SIZE 1024
79#define CTRL_URB_TX_SIZE 64
80
81#define BULK_URB_RX_SIZE 4096
82#define BULK_URB_TX_SIZE 8192
83
84#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
85#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
86#define MUX_BULK_RX_BUF_COUNT 4
87#define USB_TYPE_OPTION_VENDOR 0x20
88
89/* These definitions are used with the struct hso_net flags element */
90/* - use *_bit operations on it. (bit indices not values.) */
91#define HSO_NET_RUNNING 0
92
93#define HSO_NET_TX_TIMEOUT (HZ*10)
94
95/* Serial port defines and structs. */
96#define HSO_SERIAL_FLAG_RX_SENT 0
97
98#define HSO_SERIAL_MAGIC 0x48534f31
99
100/* Number of ttys to handle */
101#define HSO_SERIAL_TTY_MINORS 256
102
103#define MAX_RX_URBS 2
104
0235f641
GKH		 105static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
106{
107 if (tty)
108 return tty->driver_data;
109 return NULL;
110}
72dc1c09
GKH		 111
112/*****************************************************************************/
113/* Debugging functions */
114/*****************************************************************************/
115#define D__(lvl_, fmt, arg...) \
116 do { \
117 printk(lvl_ "[%d:%s]: " fmt "\n", \
118 __LINE__, __func__, ## arg); \
119 } while (0)
120
121#define D_(lvl, args...) \
122 do { \
123 if (lvl & debug) \
124 D__(KERN_INFO, args); \
125 } while (0)
126
127#define D1(args...) D_(0x01, ##args)
128#define D2(args...) D_(0x02, ##args)
129#define D3(args...) D_(0x04, ##args)
130#define D4(args...) D_(0x08, ##args)
131#define D5(args...) D_(0x10, ##args)
132
133/*****************************************************************************/
134/* Enumerators */
135/*****************************************************************************/
136enum pkt_parse_state {
137 WAIT_IP,
138 WAIT_DATA,
139 WAIT_SYNC
140};
141
142/*****************************************************************************/
143/* Structs */
144/*****************************************************************************/
145
146struct hso_shared_int {
147 struct usb_endpoint_descriptor *intr_endp;
148 void *shared_intr_buf;
149 struct urb *shared_intr_urb;
150 struct usb_device *usb;
151 int use_count;
152 int ref_count;
153 struct mutex shared_int_lock;
154};
155
156struct hso_net {
157 struct hso_device *parent;
158 struct net_device *net;
159 struct rfkill *rfkill;
160
161 struct usb_endpoint_descriptor *in_endp;
162 struct usb_endpoint_descriptor *out_endp;
163
164 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
165 struct urb *mux_bulk_tx_urb;
166 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
167 void *mux_bulk_tx_buf;
168
169 struct sk_buff *skb_rx_buf;
170 struct sk_buff *skb_tx_buf;
171
172 enum pkt_parse_state rx_parse_state;
173 spinlock_t net_lock;
174
175 unsigned short rx_buf_size;
176 unsigned short rx_buf_missing;
177 struct iphdr rx_ip_hdr;
178
179 unsigned long flags;
180};
181
182struct hso_serial {
183 struct hso_device *parent;
184 int magic;
185 u8 minor;
186
187 struct hso_shared_int *shared_int;
188
189 /* rx/tx urb could be either a bulk urb or a control urb depending
190 on which serial port it is used on. */
191 struct urb *rx_urb[MAX_RX_URBS];
192 u8 num_rx_urbs;
193 u8 *rx_data[MAX_RX_URBS];
194 u16 rx_data_length; /* should contain allocated length */
195
196 struct urb *tx_urb;
197 u8 *tx_data;
198 u8 *tx_buffer;
199 u16 tx_data_length; /* should contain allocated length */
200 u16 tx_data_count;
201 u16 tx_buffer_count;
202 struct usb_ctrlrequest ctrl_req_tx;
203 struct usb_ctrlrequest ctrl_req_rx;
204
205 struct usb_endpoint_descriptor *in_endp;
206 struct usb_endpoint_descriptor *out_endp;
207
208 unsigned long flags;
209 u8 rts_state;
210 u8 dtr_state;
211 unsigned tx_urb_used:1;
212
213 /* from usb_serial_port */
214 struct tty_struct *tty;
215 int open_count;
216 spinlock_t serial_lock;
217
218 int (*write_data) (struct hso_serial *serial);
219};
220
221struct hso_device {
222 union {
223 struct hso_serial *dev_serial;
224 struct hso_net *dev_net;
225 } port_data;
226
227 u32 port_spec;
228
229 u8 is_active;
230 u8 usb_gone;
231 struct work_struct async_get_intf;
232 struct work_struct async_put_intf;
233
234 struct usb_device *usb;
235 struct usb_interface *interface;
236
237 struct device *dev;
238 struct kref ref;
239 struct mutex mutex;
240};
241
242/* Type of interface */
243#define HSO_INTF_MASK 0xFF00
244#define HSO_INTF_MUX 0x0100
245#define HSO_INTF_BULK 0x0200
246
247/* Type of port */
248#define HSO_PORT_MASK 0xFF
249#define HSO_PORT_NO_PORT 0x0
250#define HSO_PORT_CONTROL 0x1
251#define HSO_PORT_APP 0x2
252#define HSO_PORT_GPS 0x3
253#define HSO_PORT_PCSC 0x4
254#define HSO_PORT_APP2 0x5
255#define HSO_PORT_GPS_CONTROL 0x6
256#define HSO_PORT_MSD 0x7
257#define HSO_PORT_VOICE 0x8
258#define HSO_PORT_DIAG2 0x9
259#define HSO_PORT_DIAG 0x10
260#define HSO_PORT_MODEM 0x11
261#define HSO_PORT_NETWORK 0x12
262
263/* Additional device info */
264#define HSO_INFO_MASK 0xFF000000
265#define HSO_INFO_CRC_BUG 0x01000000
266
267/*****************************************************************************/
268/* Prototypes */
269/*****************************************************************************/
270/* Serial driver functions */
271static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
272 unsigned int set, unsigned int clear);
273static void ctrl_callback(struct urb *urb);
274static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
275static void hso_kick_transmit(struct hso_serial *serial);
276/* Helper functions */
277static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
278 struct usb_device *usb, gfp_t gfp);
279static void log_usb_status(int status, const char *function);
280static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
281 int type, int dir);
282static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
283static void hso_free_interface(struct usb_interface *intf);
284static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
285static int hso_stop_serial_device(struct hso_device *hso_dev);
286static int hso_start_net_device(struct hso_device *hso_dev);
287static void hso_free_shared_int(struct hso_shared_int *shared_int);
288static int hso_stop_net_device(struct hso_device *hso_dev);
289static void hso_serial_ref_free(struct kref *ref);
290static void async_get_intf(struct work_struct *data);
291static void async_put_intf(struct work_struct *data);
292static int hso_put_activity(struct hso_device *hso_dev);
293static int hso_get_activity(struct hso_device *hso_dev);
294
295/*****************************************************************************/
296/* Helping functions */
297/*****************************************************************************/
298
299/* #define DEBUG */
300
0235f641
GKH		 301static inline struct hso_net *dev2net(struct hso_device *hso_dev)
302{
303 return hso_dev->port_data.dev_net;
304}
305
306static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
307{
308 return hso_dev->port_data.dev_serial;
309}
72dc1c09
GKH		 310
311/* Debugging functions */
312#ifdef DEBUG
313static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
314 unsigned int len)
315{
0235f641 316 static char name[255];
72dc1c09 317
0235f641
GKH		 318 sprintf(name, "hso[%d:%s]", line_count, func_name);
319 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 320}
321
322#define DUMP(buf_, len_) \
323 dbg_dump(__LINE__, __func__, buf_, len_)
324
325#define DUMP1(buf_, len_) \
326 do { \
327 if (0x01 & debug) \
328 DUMP(buf_, len_); \
329 } while (0)
330#else
331#define DUMP(buf_, len_)
332#define DUMP1(buf_, len_)
333#endif
334
335/* module parameters */
336static int debug;
337static int tty_major;
338static int disable_net;
339
340/* driver info */
341static const char driver_name[] = "hso";
342static const char tty_filename[] = "ttyHS";
343static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
344/* the usb driver itself (registered in hso_init) */
345static struct usb_driver hso_driver;
346/* serial structures */
347static struct tty_driver *tty_drv;
348static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
349static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
350static spinlock_t serial_table_lock;
351static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
352static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
353
354static const s32 default_port_spec[] = {
355 HSO_INTF_MUX | HSO_PORT_NETWORK,
356 HSO_INTF_BULK | HSO_PORT_DIAG,
357 HSO_INTF_BULK | HSO_PORT_MODEM,
358 0
359};
360
361static const s32 icon321_port_spec[] = {
362 HSO_INTF_MUX | HSO_PORT_NETWORK,
363 HSO_INTF_BULK | HSO_PORT_DIAG2,
364 HSO_INTF_BULK | HSO_PORT_MODEM,
365 HSO_INTF_BULK | HSO_PORT_DIAG,
366 0
367};
368
369#define default_port_device(vendor, product) \
370 USB_DEVICE(vendor, product), \
371 .driver_info = (kernel_ulong_t)default_port_spec
372
373#define icon321_port_device(vendor, product) \
374 USB_DEVICE(vendor, product), \
375 .driver_info = (kernel_ulong_t)icon321_port_spec
376
377/* list of devices we support */
378static const struct usb_device_id hso_ids[] = {
379 {default_port_device(0x0af0, 0x6711)},
380 {default_port_device(0x0af0, 0x6731)},
381 {default_port_device(0x0af0, 0x6751)},
382 {default_port_device(0x0af0, 0x6771)},
383 {default_port_device(0x0af0, 0x6791)},
384 {default_port_device(0x0af0, 0x6811)},
385 {default_port_device(0x0af0, 0x6911)},
386 {default_port_device(0x0af0, 0x6951)},
387 {default_port_device(0x0af0, 0x6971)},
388 {default_port_device(0x0af0, 0x7011)},
389 {default_port_device(0x0af0, 0x7031)},
390 {default_port_device(0x0af0, 0x7051)},
391 {default_port_device(0x0af0, 0x7071)},
392 {default_port_device(0x0af0, 0x7111)},
393 {default_port_device(0x0af0, 0x7211)},
394 {default_port_device(0x0af0, 0x7251)},
395 {default_port_device(0x0af0, 0x7271)},
396 {default_port_device(0x0af0, 0x7311)},
397 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
398 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
399 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 400 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 401 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
402 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
403 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
404 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
405 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
406 {}
407};
408MODULE_DEVICE_TABLE(usb, hso_ids);
409
410/* Sysfs attribute */
411static ssize_t hso_sysfs_show_porttype(struct device *dev,
412 struct device_attribute *attr,
413 char *buf)
414{
415 struct hso_device *hso_dev = dev->driver_data;
416 char *port_name;
417
418 if (!hso_dev)
419 return 0;
420
421 switch (hso_dev->port_spec & HSO_PORT_MASK) {
422 case HSO_PORT_CONTROL:
423 port_name = "Control";
424 break;
425 case HSO_PORT_APP:
426 port_name = "Application";
427 break;
428 case HSO_PORT_APP2:
429 port_name = "Application2";
430 break;
431 case HSO_PORT_GPS:
432 port_name = "GPS";
433 break;
434 case HSO_PORT_GPS_CONTROL:
435 port_name = "GPS Control";
436 break;
437 case HSO_PORT_PCSC:
438 port_name = "PCSC";
439 break;
440 case HSO_PORT_DIAG:
441 port_name = "Diagnostic";
442 break;
443 case HSO_PORT_DIAG2:
444 port_name = "Diagnostic2";
445 break;
446 case HSO_PORT_MODEM:
447 port_name = "Modem";
448 break;
449 case HSO_PORT_NETWORK:
450 port_name = "Network";
451 break;
452 default:
453 port_name = "Unknown";
454 break;
455 }
456
457 return sprintf(buf, "%s\n", port_name);
458}
459static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
460
461/* converts mux value to a port spec value */
462static u32 hso_mux_to_port(int mux)
463{
464 u32 result;
465
466 switch (mux) {
467 case 0x1:
468 result = HSO_PORT_CONTROL;
469 break;
470 case 0x2:
471 result = HSO_PORT_APP;
472 break;
473 case 0x4:
474 result = HSO_PORT_PCSC;
475 break;
476 case 0x8:
477 result = HSO_PORT_GPS;
478 break;
479 case 0x10:
480 result = HSO_PORT_APP2;
481 break;
482 default:
483 result = HSO_PORT_NO_PORT;
484 }
485 return result;
486}
487
488/* converts port spec value to a mux value */
489static u32 hso_port_to_mux(int port)
490{
491 u32 result;
492
493 switch (port & HSO_PORT_MASK) {
494 case HSO_PORT_CONTROL:
495 result = 0x0;
496 break;
497 case HSO_PORT_APP:
498 result = 0x1;
499 break;
500 case HSO_PORT_PCSC:
501 result = 0x2;
502 break;
503 case HSO_PORT_GPS:
504 result = 0x3;
505 break;
506 case HSO_PORT_APP2:
507 result = 0x4;
508 break;
509 default:
510 result = 0x0;
511 }
512 return result;
513}
514
515static struct hso_serial *get_serial_by_shared_int_and_type(
516 struct hso_shared_int *shared_int,
517 int mux)
518{
519 int i, port;
520
521 port = hso_mux_to_port(mux);
522
523 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
524 if (serial_table[i]
525 && (dev2ser(serial_table[i])->shared_int == shared_int)
526 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
527 return dev2ser(serial_table[i]);
528 }
529 }
530
531 return NULL;
532}
533
534static struct hso_serial *get_serial_by_index(unsigned index)
535{
0235f641 536 struct hso_serial *serial = NULL;
72dc1c09
GKH		 537 unsigned long flags;
538
72dc1c09 539 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 540 if (serial_table[index])
541 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 542 spin_unlock_irqrestore(&serial_table_lock, flags);
543
544 return serial;
545}
546
547static int get_free_serial_index(void)
548{
549 int index;
550 unsigned long flags;
551
552 spin_lock_irqsave(&serial_table_lock, flags);
553 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
554 if (serial_table[index] == NULL) {
555 spin_unlock_irqrestore(&serial_table_lock, flags);
556 return index;
557 }
558 }
559 spin_unlock_irqrestore(&serial_table_lock, flags);
560
561 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
562 return -1;
563}
564
565static void set_serial_by_index(unsigned index, struct hso_serial *serial)
566{
567 unsigned long flags;
0235f641 568
72dc1c09
GKH		 569 spin_lock_irqsave(&serial_table_lock, flags);
570 if (serial)
571 serial_table[index] = serial->parent;
572 else
573 serial_table[index] = NULL;
574 spin_unlock_irqrestore(&serial_table_lock, flags);
575}
576
0235f641 577/* log a meaningful explanation of an USB status */
72dc1c09
GKH		 578static void log_usb_status(int status, const char *function)
579{
580 char *explanation;
581
582 switch (status) {
583 case -ENODEV:
584 explanation = "no device";
585 break;
586 case -ENOENT:
587 explanation = "endpoint not enabled";
588 break;
589 case -EPIPE:
590 explanation = "endpoint stalled";
591 break;
592 case -ENOSPC:
593 explanation = "not enough bandwidth";
594 break;
595 case -ESHUTDOWN:
596 explanation = "device disabled";
597 break;
598 case -EHOSTUNREACH:
599 explanation = "device suspended";
600 break;
601 case -EINVAL:
602 case -EAGAIN:
603 case -EFBIG:
604 case -EMSGSIZE:
605 explanation = "internal error";
606 break;
607 default:
608 explanation = "unknown status";
609 break;
610 }
611 D1("%s: received USB status - %s (%d)", function, explanation, status);
612}
613
614/* Network interface functions */
615
616/* called when net interface is brought up by ifconfig */
617static int hso_net_open(struct net_device *net)
618{
619 struct hso_net *odev = netdev_priv(net);
620 unsigned long flags = 0;
621
622 if (!odev) {
623 dev_err(&net->dev, "No net device !\n");
624 return -ENODEV;
625 }
626
627 odev->skb_tx_buf = NULL;
628
629 /* setup environment */
630 spin_lock_irqsave(&odev->net_lock, flags);
631 odev->rx_parse_state = WAIT_IP;
632 odev->rx_buf_size = 0;
633 odev->rx_buf_missing = sizeof(struct iphdr);
634 spin_unlock_irqrestore(&odev->net_lock, flags);
635
636 hso_start_net_device(odev->parent);
637
638 /* We are up and running. */
639 set_bit(HSO_NET_RUNNING, &odev->flags);
640
641 /* Tell the kernel we are ready to start receiving from it */
642 netif_start_queue(net);
643
644 return 0;
645}
646
647/* called when interface is brought down by ifconfig */
648static int hso_net_close(struct net_device *net)
649{
650 struct hso_net *odev = netdev_priv(net);
651
652 /* we don't need the queue anymore */
653 netif_stop_queue(net);
654 /* no longer running */
655 clear_bit(HSO_NET_RUNNING, &odev->flags);
656
657 hso_stop_net_device(odev->parent);
658
659 /* done */
660 return 0;
661}
662
663/* USB tells is xmit done, we should start the netqueue again */
664static void write_bulk_callback(struct urb *urb)
665{
666 struct hso_net *odev = urb->context;
667 int status = urb->status;
668
669 /* Sanity check */
670 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
671 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
672 return;
673 }
674
675 /* Do we still have a valid kernel network device? */
676 if (!netif_device_present(odev->net)) {
677 dev_err(&urb->dev->dev, "%s: net device not present\n",
678 __func__);
679 return;
680 }
681
682 /* log status, but don't act on it, we don't need to resubmit anything
683 * anyhow */
684 if (status)
685 log_usb_status(status, __func__);
686
687 hso_put_activity(odev->parent);
688
689 /* Tell the network interface we are ready for another frame */
690 netif_wake_queue(odev->net);
691}
692
693/* called by kernel when we need to transmit a packet */
694static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
695{
696 struct hso_net *odev = netdev_priv(net);
697 int result;
698
699 /* Tell the kernel, "No more frames 'til we are done with this one." */
700 netif_stop_queue(net);
701 if (hso_get_activity(odev->parent) == -EAGAIN) {
702 odev->skb_tx_buf = skb;
703 return 0;
704 }
705
706 /* log if asked */
707 DUMP1(skb->data, skb->len);
708 /* Copy it from kernel memory to OUR memory */
709 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
710 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
711
712 /* Fill in the URB for shipping it out. */
713 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
714 odev->parent->usb,
715 usb_sndbulkpipe(odev->parent->usb,
716 odev->out_endp->
717 bEndpointAddress & 0x7F),
718 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
719 odev);
720
721 /* Deal with the Zero Length packet problem, I hope */
722 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
723
724 /* Send the URB on its merry way. */
725 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
726 if (result) {
727 dev_warn(&odev->parent->interface->dev,
728 "failed mux_bulk_tx_urb %d", result);
729 net->stats.tx_errors++;
730 netif_start_queue(net);
731 } else {
732 net->stats.tx_packets++;
733 net->stats.tx_bytes += skb->len;
734 /* And tell the kernel when the last transmit started. */
735 net->trans_start = jiffies;
736 }
737 dev_kfree_skb(skb);
738 /* we're done */
739 return result;
740}
741
742static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
743{
744 struct hso_net *odev = netdev_priv(net);
745
746 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
747 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
748 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
749}
750
751static struct ethtool_ops ops = {
752 .get_drvinfo = hso_get_drvinfo,
753 .get_link = ethtool_op_get_link
754};
755
756/* called when a packet did not ack after watchdogtimeout */
757static void hso_net_tx_timeout(struct net_device *net)
758{
759 struct hso_net *odev = netdev_priv(net);
760
761 if (!odev)
762 return;
763
764 /* Tell syslog we are hosed. */
765 dev_warn(&net->dev, "Tx timed out.\n");
766
767 /* Tear the waiting frame off the list */
768 if (odev->mux_bulk_tx_urb
769 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
770 usb_unlink_urb(odev->mux_bulk_tx_urb);
771
772 /* Update statistics */
773 net->stats.tx_errors++;
774}
775
776/* make a real packet from the received USB buffer */
777static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
778 unsigned int count, unsigned char is_eop)
779{
780 unsigned short temp_bytes;
781 unsigned short buffer_offset = 0;
782 unsigned short frame_len;
783 unsigned char *tmp_rx_buf;
784
785 /* log if needed */
786 D1("Rx %d bytes", count);
787 DUMP(ip_pkt, min(128, (int)count));
788
789 while (count) {
790 switch (odev->rx_parse_state) {
791 case WAIT_IP:
792 /* waiting for IP header. */
793 /* wanted bytes - size of ip header */
794 temp_bytes =
795 (count <
796 odev->rx_buf_missing) ? count : odev->
797 rx_buf_missing;
798
799 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
800 odev->rx_buf_size, ip_pkt + buffer_offset,
801 temp_bytes);
802
803 odev->rx_buf_size += temp_bytes;
804 buffer_offset += temp_bytes;
805 odev->rx_buf_missing -= temp_bytes;
806 count -= temp_bytes;
807
808 if (!odev->rx_buf_missing) {
809 /* header is complete allocate an sk_buffer and
810 * continue to WAIT_DATA */
811 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
812
813 if ((frame_len > DEFAULT_MRU) ||
814 (frame_len < sizeof(struct iphdr))) {
815 dev_err(&odev->net->dev,
816 "Invalid frame (%d) length\n",
817 frame_len);
818 odev->rx_parse_state = WAIT_SYNC;
819 continue;
820 }
821 /* Allocate an sk_buff */
822 odev->skb_rx_buf = dev_alloc_skb(frame_len);
823 if (!odev->skb_rx_buf) {
824 /* We got no receive buffer. */
825 D1("could not allocate memory");
826 odev->rx_parse_state = WAIT_SYNC;
827 return;
828 }
829 /* Here's where it came from */
830 odev->skb_rx_buf->dev = odev->net;
831
832 /* Copy what we got so far. make room for iphdr
833 * after tail. */
834 tmp_rx_buf =
835 skb_put(odev->skb_rx_buf,
836 sizeof(struct iphdr));
837 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
838 sizeof(struct iphdr));
839
840 /* ETH_HLEN */
841 odev->rx_buf_size = sizeof(struct iphdr);
842
843 /* Filip actually use .tot_len */
844 odev->rx_buf_missing =
845 frame_len - sizeof(struct iphdr);
846 odev->rx_parse_state = WAIT_DATA;
847 }
848 break;
849
850 case WAIT_DATA:
851 temp_bytes = (count < odev->rx_buf_missing)
852 ? count : odev->rx_buf_missing;
853
854 /* Copy the rest of the bytes that are left in the
855 * buffer into the waiting sk_buf. */
856 /* Make room for temp_bytes after tail. */
857 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
858 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
859
860 odev->rx_buf_missing -= temp_bytes;
861 count -= temp_bytes;
862 buffer_offset += temp_bytes;
863 odev->rx_buf_size += temp_bytes;
864 if (!odev->rx_buf_missing) {
865 /* Packet is complete. Inject into stack. */
866 /* We have IP packet here */
867 odev->skb_rx_buf->protocol =
868 __constant_htons(ETH_P_IP);
869 /* don't check it */
870 odev->skb_rx_buf->ip_summed =
871 CHECKSUM_UNNECESSARY;
872
873 skb_reset_mac_header(odev->skb_rx_buf);
874
875 /* Ship it off to the kernel */
876 netif_rx(odev->skb_rx_buf);
877 /* No longer our buffer. */
878 odev->skb_rx_buf = NULL;
879
880 /* update out statistics */
881 odev->net->stats.rx_packets++;
882
883 odev->net->stats.rx_bytes += odev->rx_buf_size;
884
885 odev->rx_buf_size = 0;
886 odev->rx_buf_missing = sizeof(struct iphdr);
887 odev->rx_parse_state = WAIT_IP;
888 }
889 break;
890
891 case WAIT_SYNC:
892 D1(" W_S");
893 count = 0;
894 break;
895 default:
896 D1(" ");
897 count--;
898 break;
899 }
900 }
901
902 /* Recovery mechanism for WAIT_SYNC state. */
903 if (is_eop) {
904 if (odev->rx_parse_state == WAIT_SYNC) {
905 odev->rx_parse_state = WAIT_IP;
906 odev->rx_buf_size = 0;
907 odev->rx_buf_missing = sizeof(struct iphdr);
908 }
909 }
910}
911
912/* Moving data from usb to kernel (in interrupt state) */
913static void read_bulk_callback(struct urb *urb)
914{
915 struct hso_net *odev = urb->context;
916 struct net_device *net;
917 int result;
918 int status = urb->status;
919
920 /* is al ok? (Filip: Who's Al ?) */
921 if (status) {
922 log_usb_status(status, __func__);
923 return;
924 }
925
926 /* Sanity check */
927 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
928 D1("BULK IN callback but driver is not active!");
929 return;
930 }
931 usb_mark_last_busy(urb->dev);
932
933 net = odev->net;
934
935 if (!netif_device_present(net)) {
936 /* Somebody killed our network interface... */
937 return;
938 }
939
940 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
941 u32 rest;
942 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
943 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
944 if (((rest == 5) || (rest == 6))
945 && !memcmp(((u8 *) urb->transfer_buffer) +
946 urb->actual_length - 4, crc_check, 4)) {
947 urb->actual_length -= 4;
948 }
949 }
950
951 /* do we even have a packet? */
952 if (urb->actual_length) {
953 /* Handle the IP stream, add header and push it onto network
954 * stack if the packet is complete. */
955 spin_lock(&odev->net_lock);
956 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
957 (urb->transfer_buffer_length >
958 urb->actual_length) ? 1 : 0);
959 spin_unlock(&odev->net_lock);
960 }
961
962 /* We are done with this URB, resubmit it. Prep the USB to wait for
963 * another frame. Reuse same as received. */
964 usb_fill_bulk_urb(urb,
965 odev->parent->usb,
966 usb_rcvbulkpipe(odev->parent->usb,
967 odev->in_endp->
968 bEndpointAddress & 0x7F),
969 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
970 read_bulk_callback, odev);
971
972 /* Give this to the USB subsystem so it can tell us when more data
973 * arrives. */
974 result = usb_submit_urb(urb, GFP_ATOMIC);
975 if (result)
976 dev_warn(&odev->parent->interface->dev,
977 "%s failed submit mux_bulk_rx_urb %d", __func__,
978 result);
979}
980
981/* Serial driver functions */
982
983static void _hso_serial_set_termios(struct tty_struct *tty,
984 struct ktermios *old)
985{
986 struct hso_serial *serial = get_serial_by_tty(tty);
987 struct ktermios *termios;
988
989 if ((!tty) || (!tty->termios) || (!serial)) {
990 printk(KERN_ERR "%s: no tty structures", __func__);
991 return;
992 }
993
994 D4("port %d", serial->minor);
995
996 /*
997 * The default requirements for this device are:
998 */
999 termios = tty->termios;
1000 termios->c_iflag &=
1001 ~(IGNBRK /* disable ignore break */
1002 | BRKINT /* disable break causes interrupt */
1003 | PARMRK /* disable mark parity errors */
1004 | ISTRIP /* disable clear high bit of input characters */
1005 | INLCR /* disable translate NL to CR */
1006 | IGNCR /* disable ignore CR */
1007 | ICRNL /* disable translate CR to NL */
1008 | IXON); /* disable enable XON/XOFF flow control */
1009
1010 /* disable postprocess output characters */
1011 termios->c_oflag &= ~OPOST;
1012
1013 termios->c_lflag &=
1014 ~(ECHO /* disable echo input characters */
1015 | ECHONL /* disable echo new line */
1016 | ICANON /* disable erase, kill, werase, and rprnt
1017 special characters */
1018 | ISIG /* disable interrupt, quit, and suspend special
1019 characters */
1020 | IEXTEN); /* disable non-POSIX special characters */
1021
1022 termios->c_cflag &=
1023 ~(CSIZE /* no size */
1024 | PARENB /* disable parity bit */
1025 | CBAUD /* clear current baud rate */
1026 | CBAUDEX); /* clear current buad rate */
1027
1028 termios->c_cflag |= CS8; /* character size 8 bits */
1029
1030 /* baud rate 115200 */
1031 tty_encode_baud_rate(serial->tty, 115200, 115200);
1032
1033 /*
1034 * Force low_latency on; otherwise the pushes are scheduled;
1035 * this is bad as it opens up the possibility of dropping bytes
1036 * on the floor. We don't want to drop bytes on the floor. :)
1037 */
1038 serial->tty->low_latency = 1;
1039 return;
1040}
1041
1042/* open the requested serial port */
1043static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1044{
1045 struct hso_serial *serial = get_serial_by_index(tty->index);
1046 int result;
1047
1048 /* sanity check */
1049 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1050 tty->driver_data = NULL;
1051 D1("Failed to open port");
1052 return -ENODEV;
1053 }
1054
1055 mutex_lock(&serial->parent->mutex);
1056 result = usb_autopm_get_interface(serial->parent->interface);
1057 if (result < 0)
1058 goto err_out;
1059
1060 D1("Opening %d", serial->minor);
1061 kref_get(&serial->parent->ref);
1062
1063 /* setup */
1064 tty->driver_data = serial;
1065 serial->tty = tty;
1066
1067 /* check for port allready opened, if not set the termios */
1068 serial->open_count++;
1069 if (serial->open_count == 1) {
1070 tty->low_latency = 1;
1071 serial->flags = 0;
1072 /* Force default termio settings */
1073 _hso_serial_set_termios(tty, NULL);
1074 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1075 if (result) {
1076 hso_stop_serial_device(serial->parent);
1077 serial->open_count--;
1078 kref_put(&serial->parent->ref, hso_serial_ref_free);
1079 }
1080 } else {
1081 D1("Port was already open");
1082 }
1083
1084 usb_autopm_put_interface(serial->parent->interface);
1085
1086 /* done */
1087 if (result)
1088 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1089err_out:
1090 mutex_unlock(&serial->parent->mutex);
1091 return result;
1092}
1093
1094/* close the requested serial port */
1095static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1096{
1097 struct hso_serial *serial = tty->driver_data;
1098 u8 usb_gone;
1099
1100 D1("Closing serial port");
1101
1102 mutex_lock(&serial->parent->mutex);
1103 usb_gone = serial->parent->usb_gone;
1104
1105 if (!usb_gone)
1106 usb_autopm_get_interface(serial->parent->interface);
1107
1108 /* reset the rts and dtr */
1109 /* do the actual close */
1110 serial->open_count--;
6d558a52 1111 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09 1112 if (serial->open_count <= 0) {
72dc1c09
GKH		 1113 serial->open_count = 0;
1114 if (serial->tty) {
1115 serial->tty->driver_data = NULL;
1116 serial->tty = NULL;
1117 }
1118 if (!usb_gone)
1119 hso_stop_serial_device(serial->parent);
1120 }
1121 if (!usb_gone)
1122 usb_autopm_put_interface(serial->parent->interface);
1123 mutex_unlock(&serial->parent->mutex);
1124}
1125
1126/* close the requested serial port */
1127static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1128 int count)
1129{
1130 struct hso_serial *serial = get_serial_by_tty(tty);
1131 int space, tx_bytes;
1132 unsigned long flags;
1133
1134 /* sanity check */
1135 if (serial == NULL) {
1136 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1137 return -ENODEV;
1138 }
1139
1140 spin_lock_irqsave(&serial->serial_lock, flags);
1141
1142 space = serial->tx_data_length - serial->tx_buffer_count;
1143 tx_bytes = (count < space) ? count : space;
1144
1145 if (!tx_bytes)
1146 goto out;
1147
1148 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1149 serial->tx_buffer_count += tx_bytes;
1150
1151out:
1152 spin_unlock_irqrestore(&serial->serial_lock, flags);
1153
1154 hso_kick_transmit(serial);
1155 /* done */
1156 return tx_bytes;
1157}
1158
1159/* how much room is there for writing */
1160static int hso_serial_write_room(struct tty_struct *tty)
1161{
1162 struct hso_serial *serial = get_serial_by_tty(tty);
1163 int room;
1164 unsigned long flags;
1165
1166 spin_lock_irqsave(&serial->serial_lock, flags);
1167 room = serial->tx_data_length - serial->tx_buffer_count;
1168 spin_unlock_irqrestore(&serial->serial_lock, flags);
1169
1170 /* return free room */
1171 return room;
1172}
1173
1174/* setup the term */
1175static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1176{
1177 struct hso_serial *serial = get_serial_by_tty(tty);
1178 unsigned long flags;
1179
1180 if (old)
1181 D5("Termios called with: cflags new[%d] - old[%d]",
1182 tty->termios->c_cflag, old->c_cflag);
1183
1184 /* the actual setup */
1185 spin_lock_irqsave(&serial->serial_lock, flags);
1186 if (serial->open_count)
1187 _hso_serial_set_termios(tty, old);
1188 else
1189 tty->termios = old;
1190 spin_unlock_irqrestore(&serial->serial_lock, flags);
1191
1192 /* done */
1193 return;
1194}
1195
1196/* how many characters in the buffer */
1197static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1198{
1199 struct hso_serial *serial = get_serial_by_tty(tty);
1200 int chars;
1201 unsigned long flags;
1202
1203 /* sanity check */
1204 if (serial == NULL)
1205 return 0;
1206
1207 spin_lock_irqsave(&serial->serial_lock, flags);
1208 chars = serial->tx_buffer_count;
1209 spin_unlock_irqrestore(&serial->serial_lock, flags);
1210
1211 return chars;
1212}
1213
1214static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1215{
1216 unsigned int value;
1217 struct hso_serial *serial = get_serial_by_tty(tty);
1218 unsigned long flags;
1219
1220 /* sanity check */
1221 if (!serial) {
1222 D1("no tty structures");
1223 return -EINVAL;
1224 }
1225
1226 spin_lock_irqsave(&serial->serial_lock, flags);
1227 value = ((serial->rts_state) ? TIOCM_RTS : 0) |
1228 ((serial->dtr_state) ? TIOCM_DTR : 0);
1229 spin_unlock_irqrestore(&serial->serial_lock, flags);
1230
1231 return value;
1232}
1233
1234static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1235 unsigned int set, unsigned int clear)
1236{
1237 int val = 0;
1238 unsigned long flags;
1239 int if_num;
1240 struct hso_serial *serial = get_serial_by_tty(tty);
1241
1242 /* sanity check */
1243 if (!serial) {
1244 D1("no tty structures");
1245 return -EINVAL;
1246 }
1247 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1248
1249 spin_lock_irqsave(&serial->serial_lock, flags);
1250 if (set & TIOCM_RTS)
1251 serial->rts_state = 1;
1252 if (set & TIOCM_DTR)
1253 serial->dtr_state = 1;
1254
1255 if (clear & TIOCM_RTS)
1256 serial->rts_state = 0;
1257 if (clear & TIOCM_DTR)
1258 serial->dtr_state = 0;
1259
1260 if (serial->dtr_state)
1261 val |= 0x01;
1262 if (serial->rts_state)
1263 val |= 0x02;
1264
1265 spin_unlock_irqrestore(&serial->serial_lock, flags);
1266
1267 return usb_control_msg(serial->parent->usb,
1268 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1269 0x21, val, if_num, NULL, 0,
1270 USB_CTRL_SET_TIMEOUT);
1271}
1272
1273/* starts a transmit */
1274static void hso_kick_transmit(struct hso_serial *serial)
1275{
1276 u8 *temp;
1277 unsigned long flags;
1278 int res;
1279
1280 spin_lock_irqsave(&serial->serial_lock, flags);
1281 if (!serial->tx_buffer_count)
1282 goto out;
1283
1284 if (serial->tx_urb_used)
1285 goto out;
1286
1287 /* Wakeup USB interface if necessary */
1288 if (hso_get_activity(serial->parent) == -EAGAIN)
1289 goto out;
1290
1291 /* Switch pointers around to avoid memcpy */
1292 temp = serial->tx_buffer;
1293 serial->tx_buffer = serial->tx_data;
1294 serial->tx_data = temp;
1295 serial->tx_data_count = serial->tx_buffer_count;
1296 serial->tx_buffer_count = 0;
1297
1298 /* If temp is set, it means we switched buffers */
1299 if (temp && serial->write_data) {
1300 res = serial->write_data(serial);
1301 if (res >= 0)
1302 serial->tx_urb_used = 1;
1303 }
1304out:
1305 spin_unlock_irqrestore(&serial->serial_lock, flags);
1306}
1307
1308/* make a request (for reading and writing data to muxed serial port) */
1309static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1310 struct urb *ctrl_urb,
1311 struct usb_ctrlrequest *ctrl_req,
1312 u8 *ctrl_urb_data, u32 size)
1313{
1314 int result;
1315 int pipe;
1316
1317 /* Sanity check */
1318 if (!serial || !ctrl_urb || !ctrl_req) {
1319 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1320 return -EINVAL;
1321 }
1322
1323 /* initialize */
1324 ctrl_req->wValue = 0;
1325 ctrl_req->wIndex = hso_port_to_mux(port);
1326 ctrl_req->wLength = size;
1327
1328 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1329 /* Reading command */
1330 ctrl_req->bRequestType = USB_DIR_IN |
1331 USB_TYPE_OPTION_VENDOR |
1332 USB_RECIP_INTERFACE;
1333 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1334 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1335 } else {
1336 /* Writing command */
1337 ctrl_req->bRequestType = USB_DIR_OUT |
1338 USB_TYPE_OPTION_VENDOR |
1339 USB_RECIP_INTERFACE;
1340 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1341 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1342 }
1343 /* syslog */
1344 D2("%s command (%02x) len: %d, port: %d",
1345 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1346 ctrl_req->bRequestType, ctrl_req->wLength, port);
1347
1348 /* Load ctrl urb */
1349 ctrl_urb->transfer_flags = 0;
1350 usb_fill_control_urb(ctrl_urb,
1351 serial->parent->usb,
1352 pipe,
1353 (u8 *) ctrl_req,
1354 ctrl_urb_data, size, ctrl_callback, serial);
1355 /* Send it on merry way */
1356 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1357 if (result) {
1358 dev_err(&ctrl_urb->dev->dev,
1359 "%s failed submit ctrl_urb %d type %d", __func__,
1360 result, type);
1361 return result;
1362 }
1363
1364 /* done */
1365 return size;
1366}
1367
1368/* called by intr_callback when read occurs */
1369static int hso_mux_serial_read(struct hso_serial *serial)
1370{
1371 if (!serial)
1372 return -EINVAL;
1373
1374 /* clean data */
1375 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1376 /* make the request */
1377
1378 if (serial->num_rx_urbs != 1) {
1379 dev_err(&serial->parent->interface->dev,
1380 "ERROR: mux'd reads with multiple buffers "
1381 "not possible\n");
1382 return 0;
1383 }
1384 return mux_device_request(serial,
1385 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1386 serial->parent->port_spec & HSO_PORT_MASK,
1387 serial->rx_urb[0],
1388 &serial->ctrl_req_rx,
1389 serial->rx_data[0], serial->rx_data_length);
1390}
1391
1392/* used for muxed serial port callback (muxed serial read) */
1393static void intr_callback(struct urb *urb)
1394{
1395 struct hso_shared_int *shared_int = urb->context;
1396 struct hso_serial *serial;
1397 unsigned char *port_req;
1398 int status = urb->status;
1399 int i;
1400
1401 usb_mark_last_busy(urb->dev);
1402
1403 /* sanity check */
1404 if (!shared_int)
1405 return;
1406
1407 /* status check */
1408 if (status) {
1409 log_usb_status(status, __func__);
1410 return;
1411 }
1412 D4("\n--- Got intr callback 0x%02X ---", status);
1413
1414 /* what request? */
1415 port_req = urb->transfer_buffer;
1416 D4(" port_req = 0x%.2X\n", *port_req);
1417 /* loop over all muxed ports to find the one sending this */
1418 for (i = 0; i < 8; i++) {
1419 /* max 8 channels on MUX */
1420 if (*port_req & (1 << i)) {
1421 serial = get_serial_by_shared_int_and_type(shared_int,
1422 (1 << i));
1423 if (serial != NULL) {
1424 D1("Pending read interrupt on port %d\n", i);
1425 if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT,
1426 &serial->flags)) {
1427 /* Setup and send a ctrl req read on
1428 * port i */
1429 hso_mux_serial_read(serial);
1430 } else {
1431 D1("Already pending a read on "
1432 "port %d\n", i);
1433 }
1434 }
1435 }
1436 }
1437 /* Resubmit interrupt urb */
1438 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1439}
1440
1441/* called for writing to muxed serial port */
1442static int hso_mux_serial_write_data(struct hso_serial *serial)
1443{
1444 if (NULL == serial)
1445 return -EINVAL;
1446
1447 return mux_device_request(serial,
1448 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1449 serial->parent->port_spec & HSO_PORT_MASK,
1450 serial->tx_urb,
1451 &serial->ctrl_req_tx,
1452 serial->tx_data, serial->tx_data_count);
1453}
1454
1455/* write callback for Diag and CS port */
1456static void hso_std_serial_write_bulk_callback(struct urb *urb)
1457{
1458 struct hso_serial *serial = urb->context;
1459 int status = urb->status;
1460
1461 /* sanity check */
1462 if (!serial) {
1463 D1("serial == NULL");
1464 return;
1465 }
1466
1467 spin_lock(&serial->serial_lock);
1468 serial->tx_urb_used = 0;
1469 spin_unlock(&serial->serial_lock);
1470 if (status) {
1471 log_usb_status(status, __func__);
1472 return;
1473 }
1474 hso_put_activity(serial->parent);
add477df
OB		 1475 if (serial->tty)
1476 tty_wakeup(serial->tty);
72dc1c09
GKH		 1477 hso_kick_transmit(serial);
1478
1479 D1(" ");
1480 return;
1481}
1482
1483/* called for writing diag or CS serial port */
1484static int hso_std_serial_write_data(struct hso_serial *serial)
1485{
1486 int count = serial->tx_data_count;
1487 int result;
1488
1489 usb_fill_bulk_urb(serial->tx_urb,
1490 serial->parent->usb,
1491 usb_sndbulkpipe(serial->parent->usb,
1492 serial->out_endp->
1493 bEndpointAddress & 0x7F),
1494 serial->tx_data, serial->tx_data_count,
1495 hso_std_serial_write_bulk_callback, serial);
1496
1497 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1498 if (result) {
1499 dev_warn(&serial->parent->usb->dev,
1500 "Failed to submit urb - res %d\n", result);
1501 return result;
1502 }
1503
1504 return count;
1505}
1506
1507/* callback after read or write on muxed serial port */
1508static void ctrl_callback(struct urb *urb)
1509{
1510 struct hso_serial *serial = urb->context;
1511 struct usb_ctrlrequest *req;
1512 int status = urb->status;
1513
1514 /* sanity check */
1515 if (!serial)
1516 return;
1517
1518 spin_lock(&serial->serial_lock);
1519 serial->tx_urb_used = 0;
1520 spin_unlock(&serial->serial_lock);
1521 if (status) {
1522 log_usb_status(status, __func__);
1523 return;
1524 }
1525
1526 /* what request? */
1527 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1528 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1529 D4("Actual length of urb = %d\n", urb->actual_length);
1530 DUMP1(urb->transfer_buffer, urb->actual_length);
1531
1532 if (req->bRequestType ==
1533 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1534 /* response to a read command */
1535 if (serial->open_count > 0) {
1536 /* handle RX data the normal way */
1537 put_rxbuf_data(urb, serial);
1538 }
1539
1540 /* Re issue a read as long as we receive data. */
1541 if (urb->actual_length != 0)
1542 hso_mux_serial_read(serial);
1543 else
1544 clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
1545 } else {
1546 hso_put_activity(serial->parent);
add477df
OB		 1547 if (serial->tty)
1548 tty_wakeup(serial->tty);
72dc1c09
GKH		 1549 /* response to a write command */
1550 hso_kick_transmit(serial);
1551 }
1552}
1553
1554/* handle RX data for serial port */
1555static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1556{
1557 struct tty_struct *tty = serial->tty;
1558
1559 /* Sanity check */
1560 if (urb == NULL || serial == NULL) {
1561 D1("serial = NULL");
1562 return;
1563 }
1564
1565 /* Push data to tty */
1566 if (tty && urb->actual_length) {
1567 D1("data to push to tty");
1568 tty_insert_flip_string(tty, urb->transfer_buffer,
1569 urb->actual_length);
1570 tty_flip_buffer_push(tty);
1571 }
1572}
1573
1574/* read callback for Diag and CS port */
1575static void hso_std_serial_read_bulk_callback(struct urb *urb)
1576{
1577 struct hso_serial *serial = urb->context;
1578 int result;
1579 int status = urb->status;
1580
1581 /* sanity check */
1582 if (!serial) {
1583 D1("serial == NULL");
1584 return;
1585 } else if (status) {
1586 log_usb_status(status, __func__);
1587 return;
1588 }
1589
1590 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1591 D1("Actual length = %d\n", urb->actual_length);
1592 DUMP1(urb->transfer_buffer, urb->actual_length);
1593
1594 /* Anyone listening? */
1595 if (serial->open_count == 0)
1596 return;
1597
1598 if (status == 0) {
1599 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1600 u32 rest;
1601 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1602 rest =
1603 urb->actual_length %
1604 serial->in_endp->wMaxPacketSize;
1605 if (((rest == 5) || (rest == 6))
1606 && !memcmp(((u8 *) urb->transfer_buffer) +
1607 urb->actual_length - 4, crc_check, 4)) {
1608 urb->actual_length -= 4;
1609 }
1610 }
1611 /* Valid data, handle RX data */
1612 put_rxbuf_data(urb, serial);
1613 } else if (status == -ENOENT || status == -ECONNRESET) {
1614 /* Unlinked - check for throttled port. */
1615 D2("Port %d, successfully unlinked urb", serial->minor);
1616 } else {
1617 D2("Port %d, status = %d for read urb", serial->minor, status);
1618 return;
1619 }
1620
1621 usb_mark_last_busy(urb->dev);
1622
1623 /* We are done with this URB, resubmit it. Prep the USB to wait for
1624 * another frame */
1625 usb_fill_bulk_urb(urb, serial->parent->usb,
1626 usb_rcvbulkpipe(serial->parent->usb,
1627 serial->in_endp->
1628 bEndpointAddress & 0x7F),
1629 urb->transfer_buffer, serial->rx_data_length,
1630 hso_std_serial_read_bulk_callback, serial);
1631 /* Give this to the USB subsystem so it can tell us when more data
1632 * arrives. */
1633 result = usb_submit_urb(urb, GFP_ATOMIC);
1634 if (result) {
1635 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d",
1636 __func__, result);
1637 }
1638}
1639
1640/* Base driver functions */
1641
1642static void hso_log_port(struct hso_device *hso_dev)
1643{
1644 char *port_type;
1645 char port_dev[20];
1646
1647 switch (hso_dev->port_spec & HSO_PORT_MASK) {
1648 case HSO_PORT_CONTROL:
1649 port_type = "Control";
1650 break;
1651 case HSO_PORT_APP:
1652 port_type = "Application";
1653 break;
1654 case HSO_PORT_GPS:
1655 port_type = "GPS";
1656 break;
1657 case HSO_PORT_GPS_CONTROL:
1658 port_type = "GPS control";
1659 break;
1660 case HSO_PORT_APP2:
1661 port_type = "Application2";
1662 break;
1663 case HSO_PORT_PCSC:
1664 port_type = "PCSC";
1665 break;
1666 case HSO_PORT_DIAG:
1667 port_type = "Diagnostic";
1668 break;
1669 case HSO_PORT_DIAG2:
1670 port_type = "Diagnostic2";
1671 break;
1672 case HSO_PORT_MODEM:
1673 port_type = "Modem";
1674 break;
1675 case HSO_PORT_NETWORK:
1676 port_type = "Network";
1677 break;
1678 default:
1679 port_type = "Unknown";
1680 break;
1681 }
1682 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1683 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1684 } else
1685 sprintf(port_dev, "/dev/%s%d", tty_filename,
1686 dev2ser(hso_dev)->minor);
1687
1688 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1689 port_type, port_dev);
1690}
1691
1692static int hso_start_net_device(struct hso_device *hso_dev)
1693{
1694 int i, result = 0;
1695 struct hso_net *hso_net = dev2net(hso_dev);
1696
1697 if (!hso_net)
1698 return -ENODEV;
1699
1700 /* send URBs for all read buffers */
1701 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1702
1703 /* Prep a receive URB */
1704 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1705 hso_dev->usb,
1706 usb_rcvbulkpipe(hso_dev->usb,
1707 hso_net->in_endp->
1708 bEndpointAddress & 0x7F),
1709 hso_net->mux_bulk_rx_buf_pool[i],
1710 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1711 hso_net);
1712
1713 /* Put it out there so the device can send us stuff */
1714 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1715 GFP_NOIO);
1716 if (result)
1717 dev_warn(&hso_dev->usb->dev,
1718 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1719 i, result);
1720 }
1721
1722 return result;
1723}
1724
1725static int hso_stop_net_device(struct hso_device *hso_dev)
1726{
1727 int i;
1728 struct hso_net *hso_net = dev2net(hso_dev);
1729
1730 if (!hso_net)
1731 return -ENODEV;
1732
1733 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1734 if (hso_net->mux_bulk_rx_urb_pool[i])
1735 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1736
1737 }
1738 if (hso_net->mux_bulk_tx_urb)
1739 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1740
1741 return 0;
1742}
1743
1744static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1745{
1746 int i, result = 0;
1747 struct hso_serial *serial = dev2ser(hso_dev);
1748
1749 if (!serial)
1750 return -ENODEV;
1751
1752 /* If it is not the MUX port fill in and submit a bulk urb (already
1753 * allocated in hso_serial_start) */
1754 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1755 for (i = 0; i < serial->num_rx_urbs; i++) {
1756 usb_fill_bulk_urb(serial->rx_urb[i],
1757 serial->parent->usb,
1758 usb_rcvbulkpipe(serial->parent->usb,
1759 serial->in_endp->
1760 bEndpointAddress &
1761 0x7F),
1762 serial->rx_data[i],
1763 serial->rx_data_length,
1764 hso_std_serial_read_bulk_callback,
1765 serial);
1766 result = usb_submit_urb(serial->rx_urb[i], flags);
1767 if (result) {
1768 dev_warn(&serial->parent->usb->dev,
1769 "Failed to submit urb - res %d\n",
1770 result);
1771 break;
1772 }
1773 }
1774 } else {
1775 mutex_lock(&serial->shared_int->shared_int_lock);
1776 if (!serial->shared_int->use_count) {
1777 result =
1778 hso_mux_submit_intr_urb(serial->shared_int,
1779 hso_dev->usb, flags);
1780 }
1781 serial->shared_int->use_count++;
1782 mutex_unlock(&serial->shared_int->shared_int_lock);
1783 }
1784
1785 return result;
1786}
1787
1788static int hso_stop_serial_device(struct hso_device *hso_dev)
1789{
1790 int i;
1791 struct hso_serial *serial = dev2ser(hso_dev);
1792
1793 if (!serial)
1794 return -ENODEV;
1795
1796 for (i = 0; i < serial->num_rx_urbs; i++) {
1797 if (serial->rx_urb[i])
1798 usb_kill_urb(serial->rx_urb[i]);
1799 }
1800
1801 if (serial->tx_urb)
1802 usb_kill_urb(serial->tx_urb);
1803
1804 if (serial->shared_int) {
1805 mutex_lock(&serial->shared_int->shared_int_lock);
1806 if (serial->shared_int->use_count &&
1807 (--serial->shared_int->use_count == 0)) {
1808 struct urb *urb;
1809
1810 urb = serial->shared_int->shared_intr_urb;
1811 if (urb)
1812 usb_kill_urb(urb);
1813 }
1814 mutex_unlock(&serial->shared_int->shared_int_lock);
1815 }
1816
1817 return 0;
1818}
1819
1820static void hso_serial_common_free(struct hso_serial *serial)
1821{
1822 int i;
1823
1824 if (serial->parent->dev)
1825 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
1826
1827 tty_unregister_device(tty_drv, serial->minor);
1828
1829 for (i = 0; i < serial->num_rx_urbs; i++) {
1830 /* unlink and free RX URB */
1831 usb_free_urb(serial->rx_urb[i]);
1832 /* free the RX buffer */
1833 kfree(serial->rx_data[i]);
1834 }
1835
1836 /* unlink and free TX URB */
1837 usb_free_urb(serial->tx_urb);
1838 kfree(serial->tx_data);
1839}
1840
1841static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
1842 int rx_size, int tx_size)
1843{
1844 struct device *dev;
1845 int minor;
1846 int i;
1847
1848 minor = get_free_serial_index();
1849 if (minor < 0)
1850 goto exit;
1851
1852 /* register our minor number */
1853 serial->parent->dev = tty_register_device(tty_drv, minor,
1854 &serial->parent->interface->dev);
1855 dev = serial->parent->dev;
1856 dev->driver_data = serial->parent;
1857 i = device_create_file(dev, &dev_attr_hsotype);
1858
1859 /* fill in specific data for later use */
1860 serial->minor = minor;
1861 serial->magic = HSO_SERIAL_MAGIC;
1862 spin_lock_init(&serial->serial_lock);
1863 serial->num_rx_urbs = num_urbs;
1864
1865 /* RX, allocate urb and initialize */
1866
1867 /* prepare our RX buffer */
1868 serial->rx_data_length = rx_size;
1869 for (i = 0; i < serial->num_rx_urbs; i++) {
1870 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1871 if (!serial->rx_urb[i]) {
1872 dev_err(dev, "Could not allocate urb?\n");
1873 goto exit;
1874 }
1875 serial->rx_urb[i]->transfer_buffer = NULL;
1876 serial->rx_urb[i]->transfer_buffer_length = 0;
1877 serial->rx_data[i] = kzalloc(serial->rx_data_length,
1878 GFP_KERNEL);
1879 if (!serial->rx_data[i]) {
1880 dev_err(dev, "%s - Out of memory\n", __func__);
1881 goto exit;
1882 }
1883 }
1884
1885 /* TX, allocate urb and initialize */
1886 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1887 if (!serial->tx_urb) {
1888 dev_err(dev, "Could not allocate urb?\n");
1889 goto exit;
1890 }
1891 serial->tx_urb->transfer_buffer = NULL;
1892 serial->tx_urb->transfer_buffer_length = 0;
1893 /* prepare our TX buffer */
1894 serial->tx_data_count = 0;
1895 serial->tx_buffer_count = 0;
1896 serial->tx_data_length = tx_size;
1897 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
1898 if (!serial->tx_data) {
1899 dev_err(dev, "%s - Out of memory", __func__);
1900 goto exit;
1901 }
1902 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
1903 if (!serial->tx_buffer) {
1904 dev_err(dev, "%s - Out of memory", __func__);
1905 goto exit;
1906 }
1907
1908 return 0;
1909exit:
1910 hso_serial_common_free(serial);
1911 return -1;
1912}
1913
1914/* Frees a general hso device */
1915static void hso_free_device(struct hso_device *hso_dev)
1916{
1917 kfree(hso_dev);
1918}
1919
1920/* Creates a general hso device */
1921static struct hso_device *hso_create_device(struct usb_interface *intf,
1922 int port_spec)
1923{
1924 struct hso_device *hso_dev;
1925
1926 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
1927 if (!hso_dev)
1928 return NULL;
1929
1930 hso_dev->port_spec = port_spec;
1931 hso_dev->usb = interface_to_usbdev(intf);
1932 hso_dev->interface = intf;
1933 kref_init(&hso_dev->ref);
1934 mutex_init(&hso_dev->mutex);
1935
1936 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
1937 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
1938
1939 return hso_dev;
1940}
1941
1942/* Removes a network device in the network device table */
1943static int remove_net_device(struct hso_device *hso_dev)
1944{
1945 int i;
1946
1947 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
1948 if (network_table[i] == hso_dev) {
1949 network_table[i] = NULL;
1950 break;
1951 }
1952 }
1953 if (i == HSO_MAX_NET_DEVICES)
1954 return -1;
1955 return 0;
1956}
1957
1958/* Frees our network device */
1959static void hso_free_net_device(struct hso_device *hso_dev)
1960{
1961 int i;
1962 struct hso_net *hso_net = dev2net(hso_dev);
1963
1964 if (!hso_net)
1965 return;
1966
1967 /* start freeing */
1968 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1969 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1970 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
1971 }
1972 usb_free_urb(hso_net->mux_bulk_tx_urb);
1973 kfree(hso_net->mux_bulk_tx_buf);
1974
1975 remove_net_device(hso_net->parent);
1976
1977 if (hso_net->net) {
1978 unregister_netdev(hso_net->net);
1979 free_netdev(hso_net->net);
1980 }
1981
1982 hso_free_device(hso_dev);
1983}
1984
1985/* initialize the network interface */
1986static void hso_net_init(struct net_device *net)
1987{
1988 struct hso_net *hso_net = netdev_priv(net);
1989
1990 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
1991
1992 /* fill in the other fields */
1993 net->open = hso_net_open;
1994 net->stop = hso_net_close;
1995 net->hard_start_xmit = hso_net_start_xmit;
1996 net->tx_timeout = hso_net_tx_timeout;
1997 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
1998 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
1999 net->type = ARPHRD_NONE;
2000 net->mtu = DEFAULT_MTU - 14;
2001 net->tx_queue_len = 10;
2002 SET_ETHTOOL_OPS(net, &ops);
2003
2004 /* and initialize the semaphore */
2005 spin_lock_init(&hso_net->net_lock);
2006}
2007
2008/* Adds a network device in the network device table */
2009static int add_net_device(struct hso_device *hso_dev)
2010{
2011 int i;
2012
2013 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2014 if (network_table[i] == NULL) {
2015 network_table[i] = hso_dev;
2016 break;
2017 }
2018 }
2019 if (i == HSO_MAX_NET_DEVICES)
2020 return -1;
2021 return 0;
2022}
2023
2024static int hso_radio_toggle(void *data, enum rfkill_state state)
2025{
2026 struct hso_device *hso_dev = data;
2027 int enabled = (state == RFKILL_STATE_ON);
2028 int rv;
2029
2030 mutex_lock(&hso_dev->mutex);
2031 if (hso_dev->usb_gone)
2032 rv = 0;
2033 else
2034 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2035 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2036 USB_CTRL_SET_TIMEOUT);
2037 mutex_unlock(&hso_dev->mutex);
2038 return rv;
2039}
2040
2041/* Creates and sets up everything for rfkill */
2042static void hso_create_rfkill(struct hso_device *hso_dev,
2043 struct usb_interface *interface)
2044{
2045 struct hso_net *hso_net = dev2net(hso_dev);
2046 struct device *dev = hso_dev->dev;
2047 char *rfkn;
2048
2049 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2050 RFKILL_TYPE_WLAN);
2051 if (!hso_net->rfkill) {
2052 dev_err(dev, "%s - Out of memory", __func__);
2053 return;
2054 }
2055 rfkn = kzalloc(20, GFP_KERNEL);
2056 if (!rfkn) {
2057 rfkill_free(hso_net->rfkill);
2058 dev_err(dev, "%s - Out of memory", __func__);
2059 return;
2060 }
2061 snprintf(rfkn, 20, "hso-%d",
2062 interface->altsetting->desc.bInterfaceNumber);
2063 hso_net->rfkill->name = rfkn;
2064 hso_net->rfkill->state = RFKILL_STATE_ON;
2065 hso_net->rfkill->data = hso_dev;
2066 hso_net->rfkill->toggle_radio = hso_radio_toggle;
2067 if (rfkill_register(hso_net->rfkill) < 0) {
2068 kfree(rfkn);
2069 hso_net->rfkill->name = NULL;
2070 rfkill_free(hso_net->rfkill);
2071 dev_err(dev, "%s - Failed to register rfkill", __func__);
2072 return;
2073 }
2074}
2075
2076/* Creates our network device */
2077static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2078{
2079 int result, i;
2080 struct net_device *net;
2081 struct hso_net *hso_net;
2082 struct hso_device *hso_dev;
2083
2084 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2085 if (!hso_dev)
2086 return NULL;
2087
2088 /* allocate our network device, then we can put in our private data */
2089 /* call hso_net_init to do the basic initialization */
2090 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2091 if (!net) {
2092 dev_err(&interface->dev, "Unable to create ethernet device\n");
2093 goto exit;
2094 }
2095
2096 hso_net = netdev_priv(net);
2097
2098 hso_dev->port_data.dev_net = hso_net;
2099 hso_net->net = net;
2100 hso_net->parent = hso_dev;
2101
2102 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2103 USB_DIR_IN);
2104 if (!hso_net->in_endp) {
2105 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2106 goto exit;
2107 }
2108 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2109 USB_DIR_OUT);
2110 if (!hso_net->out_endp) {
2111 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2112 goto exit;
2113 }
2114 SET_NETDEV_DEV(net, &interface->dev);
2115
2116 /* registering our net device */
2117 result = register_netdev(net);
2118 if (result) {
2119 dev_err(&interface->dev, "Failed to register device\n");
2120 goto exit;
2121 }
2122
2123 /* start allocating */
2124 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2125 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2126 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2127 dev_err(&interface->dev, "Could not allocate rx urb\n");
2128 goto exit;
2129 }
2130 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2131 GFP_KERNEL);
2132 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2133 dev_err(&interface->dev, "Could not allocate rx buf\n");
2134 goto exit;
2135 }
2136 }
2137 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2138 if (!hso_net->mux_bulk_tx_urb) {
2139 dev_err(&interface->dev, "Could not allocate tx urb\n");
2140 goto exit;
2141 }
2142 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2143 if (!hso_net->mux_bulk_tx_buf) {
2144 dev_err(&interface->dev, "Could not allocate tx buf\n");
2145 goto exit;
2146 }
2147
2148 add_net_device(hso_dev);
2149
2150 hso_log_port(hso_dev);
2151
2152 hso_create_rfkill(hso_dev, interface);
2153
2154 return hso_dev;
2155exit:
2156 hso_free_net_device(hso_dev);
2157 return NULL;
2158}
2159
2160/* Frees an AT channel ( goes for both mux and non-mux ) */
2161static void hso_free_serial_device(struct hso_device *hso_dev)
2162{
2163 struct hso_serial *serial = dev2ser(hso_dev);
2164
2165 if (!serial)
2166 return;
2167 set_serial_by_index(serial->minor, NULL);
2168
2169 hso_serial_common_free(serial);
2170
2171 if (serial->shared_int) {
2172 mutex_lock(&serial->shared_int->shared_int_lock);
2173 if (--serial->shared_int->ref_count == 0)
2174 hso_free_shared_int(serial->shared_int);
2175 else
2176 mutex_unlock(&serial->shared_int->shared_int_lock);
2177 }
2178 kfree(serial);
2179 hso_free_device(hso_dev);
2180}
2181
2182/* Creates a bulk AT channel */
2183static struct hso_device *hso_create_bulk_serial_device(
2184 struct usb_interface *interface, int port)
2185{
2186 struct hso_device *hso_dev;
2187 struct hso_serial *serial;
2188 int num_urbs;
2189
2190 hso_dev = hso_create_device(interface, port);
2191 if (!hso_dev)
2192 return NULL;
2193
2194 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2195 if (!serial)
2196 goto exit;
2197
2198 serial->parent = hso_dev;
2199 hso_dev->port_data.dev_serial = serial;
2200
2201 if (port & HSO_PORT_MODEM)
2202 num_urbs = 2;
2203 else
2204 num_urbs = 1;
2205
2206 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2207 BULK_URB_TX_SIZE))
2208 goto exit;
2209
2210 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2211 USB_DIR_IN);
2212 if (!serial->in_endp) {
2213 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2214 goto exit;
2215 }
2216
2217 if (!
2218 (serial->out_endp =
2219 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2220 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2221 goto exit;
2222 }
2223
2224 serial->write_data = hso_std_serial_write_data;
2225
2226 /* and record this serial */
2227 set_serial_by_index(serial->minor, serial);
2228
2229 /* setup the proc dirs and files if needed */
2230 hso_log_port(hso_dev);
2231
2232 /* done, return it */
2233 return hso_dev;
2234exit:
2235 if (hso_dev && serial)
2236 hso_serial_common_free(serial);
2237 kfree(serial);
2238 hso_free_device(hso_dev);
2239 return NULL;
2240}
2241
2242/* Creates a multiplexed AT channel */
2243static
2244struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2245 int port,
2246 struct hso_shared_int *mux)
2247{
2248 struct hso_device *hso_dev;
2249 struct hso_serial *serial;
2250 int port_spec;
2251
2252 port_spec = HSO_INTF_MUX;
2253 port_spec &= ~HSO_PORT_MASK;
2254
2255 port_spec |= hso_mux_to_port(port);
2256 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2257 return NULL;
2258
2259 hso_dev = hso_create_device(interface, port_spec);
2260 if (!hso_dev)
2261 return NULL;
2262
2263 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2264 if (!serial)
2265 goto exit;
2266
2267 hso_dev->port_data.dev_serial = serial;
2268 serial->parent = hso_dev;
2269
2270 if (hso_serial_common_create
2271 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2272 goto exit;
2273
2274 serial->tx_data_length--;
2275 serial->write_data = hso_mux_serial_write_data;
2276
2277 serial->shared_int = mux;
2278 mutex_lock(&serial->shared_int->shared_int_lock);
2279 serial->shared_int->ref_count++;
2280 mutex_unlock(&serial->shared_int->shared_int_lock);
2281
2282 /* and record this serial */
2283 set_serial_by_index(serial->minor, serial);
2284
2285 /* setup the proc dirs and files if needed */
2286 hso_log_port(hso_dev);
2287
2288 /* done, return it */
2289 return hso_dev;
2290
2291exit:
2292 if (serial) {
2293 tty_unregister_device(tty_drv, serial->minor);
2294 kfree(serial);
2295 }
2296 if (hso_dev)
2297 hso_free_device(hso_dev);
2298 return NULL;
2299
2300}
2301
2302static void hso_free_shared_int(struct hso_shared_int *mux)
2303{
2304 usb_free_urb(mux->shared_intr_urb);
2305 kfree(mux->shared_intr_buf);
2306 mutex_unlock(&mux->shared_int_lock);
2307 kfree(mux);
2308}
2309
2310static
2311struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2312{
2313 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2314
2315 if (!mux)
2316 return NULL;
2317
2318 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2319 USB_DIR_IN);
2320 if (!mux->intr_endp) {
2321 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2322 goto exit;
2323 }
2324
2325 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2326 if (!mux->shared_intr_urb) {
2327 dev_err(&interface->dev, "Could not allocate intr urb?");
2328 goto exit;
2329 }
2330 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2331 GFP_KERNEL);
2332 if (!mux->shared_intr_buf) {
2333 dev_err(&interface->dev, "Could not allocate intr buf?");
2334 goto exit;
2335 }
2336
2337 mutex_init(&mux->shared_int_lock);
2338
2339 return mux;
2340
2341exit:
2342 kfree(mux->shared_intr_buf);
2343 usb_free_urb(mux->shared_intr_urb);
2344 kfree(mux);
2345 return NULL;
2346}
2347
2348/* Gets the port spec for a certain interface */
2349static int hso_get_config_data(struct usb_interface *interface)
2350{
2351 struct usb_device *usbdev = interface_to_usbdev(interface);
2352 u8 config_data[17];
2353 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2354 s32 result;
2355
2356 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2357 0x86, 0xC0, 0, 0, config_data, 17,
2358 USB_CTRL_SET_TIMEOUT) != 0x11) {
2359 return -EIO;
2360 }
2361
2362 switch (config_data[if_num]) {
2363 case 0x0:
2364 result = 0;
2365 break;
2366 case 0x1:
2367 result = HSO_PORT_DIAG;
2368 break;
2369 case 0x2:
2370 result = HSO_PORT_GPS;
2371 break;
2372 case 0x3:
2373 result = HSO_PORT_GPS_CONTROL;
2374 break;
2375 case 0x4:
2376 result = HSO_PORT_APP;
2377 break;
2378 case 0x5:
2379 result = HSO_PORT_APP2;
2380 break;
2381 case 0x6:
2382 result = HSO_PORT_CONTROL;
2383 break;
2384 case 0x7:
2385 result = HSO_PORT_NETWORK;
2386 break;
2387 case 0x8:
2388 result = HSO_PORT_MODEM;
2389 break;
2390 case 0x9:
2391 result = HSO_PORT_MSD;
2392 break;
2393 case 0xa:
2394 result = HSO_PORT_PCSC;
2395 break;
2396 case 0xb:
2397 result = HSO_PORT_VOICE;
2398 break;
2399 default:
2400 result = 0;
2401 }
2402
2403 if (result)
2404 result |= HSO_INTF_BULK;
2405
2406 if (config_data[16] & 0x1)
2407 result |= HSO_INFO_CRC_BUG;
2408
2409 return result;
2410}
2411
2412/* called once for each interface upon device insertion */
2413static int hso_probe(struct usb_interface *interface,
2414 const struct usb_device_id *id)
2415{
2416 int mux, i, if_num, port_spec;
2417 unsigned char port_mask;
2418 struct hso_device *hso_dev = NULL;
2419 struct hso_shared_int *shared_int;
2420 struct hso_device *tmp_dev = NULL;
2421
2422 if_num = interface->altsetting->desc.bInterfaceNumber;
2423
2424 /* Get the interface/port specification from either driver_info or from
2425 * the device itself */
2426 if (id->driver_info)
2427 port_spec = ((u32 *)(id->driver_info))[if_num];
2428 else
2429 port_spec = hso_get_config_data(interface);
2430
2431 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2432 dev_err(&interface->dev, "Not our interface\n");
2433 return -ENODEV;
2434 }
2435 /* Check if we need to switch to alt interfaces prior to port
2436 * configuration */
2437 if (interface->num_altsetting > 1)
2438 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2439 interface->needs_remote_wakeup = 1;
2440
2441 /* Allocate new hso device(s) */
2442 switch (port_spec & HSO_INTF_MASK) {
2443 case HSO_INTF_MUX:
2444 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2445 /* Create the network device */
2446 if (!disable_net) {
2447 hso_dev = hso_create_net_device(interface);
2448 if (!hso_dev)
2449 goto exit;
2450 tmp_dev = hso_dev;
2451 }
2452 }
2453
2454 if (hso_get_mux_ports(interface, &port_mask))
2455 /* TODO: de-allocate everything */
2456 goto exit;
2457
2458 shared_int = hso_create_shared_int(interface);
2459 if (!shared_int)
2460 goto exit;
2461
2462 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2463 if (port_mask & i) {
2464 hso_dev = hso_create_mux_serial_device(
2465 interface, i, shared_int);
2466 if (!hso_dev)
2467 goto exit;
2468 }
2469 }
2470
2471 if (tmp_dev)
2472 hso_dev = tmp_dev;
2473 break;
2474
2475 case HSO_INTF_BULK:
2476 /* It's a regular bulk interface */
2477 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2478 && !disable_net)
2479 hso_dev = hso_create_net_device(interface);
2480 else
2481 hso_dev =
2482 hso_create_bulk_serial_device(interface, port_spec);
2483 if (!hso_dev)
2484 goto exit;
2485 break;
2486 default:
2487 goto exit;
2488 }
2489
2490 usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2491
2492 /* save our data pointer in this device */
2493 usb_set_intfdata(interface, hso_dev);
2494
2495 /* done */
2496 return 0;
2497exit:
2498 hso_free_interface(interface);
2499 return -ENODEV;
2500}
2501
2502/* device removed, cleaning up */
2503static void hso_disconnect(struct usb_interface *interface)
2504{
2505 hso_free_interface(interface);
2506
2507 /* remove reference of our private data */
2508 usb_set_intfdata(interface, NULL);
2509
2510 usb_driver_release_interface(&hso_driver, interface);
2511}
2512
2513static void async_get_intf(struct work_struct *data)
2514{
2515 struct hso_device *hso_dev =
2516 container_of(data, struct hso_device, async_get_intf);
2517 usb_autopm_get_interface(hso_dev->interface);
2518}
2519
2520static void async_put_intf(struct work_struct *data)
2521{
2522 struct hso_device *hso_dev =
2523 container_of(data, struct hso_device, async_put_intf);
2524 usb_autopm_put_interface(hso_dev->interface);
2525}
2526
2527static int hso_get_activity(struct hso_device *hso_dev)
2528{
2529 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2530 if (!hso_dev->is_active) {
2531 hso_dev->is_active = 1;
2532 schedule_work(&hso_dev->async_get_intf);
2533 }
2534 }
2535
2536 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2537 return -EAGAIN;
2538
2539 usb_mark_last_busy(hso_dev->usb);
2540
2541 return 0;
2542}
2543
2544static int hso_put_activity(struct hso_device *hso_dev)
2545{
2546 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2547 if (hso_dev->is_active) {
2548 hso_dev->is_active = 0;
2549 schedule_work(&hso_dev->async_put_intf);
2550 return -EAGAIN;
2551 }
2552 }
2553 hso_dev->is_active = 0;
2554 return 0;
2555}
2556
2557/* called by kernel when we need to suspend device */
2558static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2559{
2560 int i, result;
2561
2562 /* Stop all serial ports */
2563 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2564 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2565 result = hso_stop_serial_device(serial_table[i]);
2566 if (result)
2567 goto out;
2568 }
2569 }
2570
2571 /* Stop all network ports */
2572 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2573 if (network_table[i] &&
2574 (network_table[i]->interface == iface)) {
2575 result = hso_stop_net_device(network_table[i]);
2576 if (result)
2577 goto out;
2578 }
2579 }
2580
2581out:
2582 return 0;
2583}
2584
2585/* called by kernel when we need to resume device */
2586static int hso_resume(struct usb_interface *iface)
2587{
2588 int i, result = 0;
2589 struct hso_net *hso_net;
2590
2591 /* Start all serial ports */
2592 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2593 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2594 if (dev2ser(serial_table[i])->open_count) {
2595 result =
2596 hso_start_serial_device(serial_table[i], GFP_NOIO);
2597 hso_kick_transmit(dev2ser(serial_table[i]));
2598 if (result)
2599 goto out;
2600 }
2601 }
2602 }
2603
2604 /* Start all network ports */
2605 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2606 if (network_table[i] &&
2607 (network_table[i]->interface == iface)) {
2608 hso_net = dev2net(network_table[i]);
2609 /* First transmit any lingering data, then restart the
2610 * device. */
2611 if (hso_net->skb_tx_buf) {
2612 dev_dbg(&iface->dev,
2613 "Transmitting lingering data\n");
2614 hso_net_start_xmit(hso_net->skb_tx_buf,
2615 hso_net->net);
c213f286 2616 hso_net->skb_tx_buf = NULL;
72dc1c09
GKH		 2617 }
2618 result = hso_start_net_device(network_table[i]);
2619 if (result)
2620 goto out;
2621 }
2622 }
2623
2624out:
2625 return result;
2626}
2627
2628static void hso_serial_ref_free(struct kref *ref)
2629{
2630 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2631
2632 hso_free_serial_device(hso_dev);
2633}
2634
2635static void hso_free_interface(struct usb_interface *interface)
2636{
2637 struct hso_serial *hso_dev;
2638 int i;
2639
2640 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2641 if (serial_table[i]
2642 && (serial_table[i]->interface == interface)) {
2643 hso_dev = dev2ser(serial_table[i]);
2644 if (hso_dev->tty)
2645 tty_hangup(hso_dev->tty);
2646 mutex_lock(&hso_dev->parent->mutex);
2647 hso_dev->parent->usb_gone = 1;
2648 mutex_unlock(&hso_dev->parent->mutex);
2649 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
2650 }
2651 }
2652
2653 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2654 if (network_table[i]
2655 && (network_table[i]->interface == interface)) {
2656 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2657 /* hso_stop_net_device doesn't stop the net queue since
2658 * traffic needs to start it again when suspended */
2659 netif_stop_queue(dev2net(network_table[i])->net);
2660 hso_stop_net_device(network_table[i]);
2661 cancel_work_sync(&network_table[i]->async_put_intf);
2662 cancel_work_sync(&network_table[i]->async_get_intf);
0235f641 2663 if (rfk)
72dc1c09
GKH		 2664 rfkill_unregister(rfk);
2665 hso_free_net_device(network_table[i]);
2666 }
2667 }
2668}
2669
2670/* Helper functions */
2671
2672/* Get the endpoint ! */
2673static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2674 int type, int dir)
2675{
2676 int i;
2677 struct usb_host_interface *iface = intf->cur_altsetting;
2678 struct usb_endpoint_descriptor *endp;
2679
2680 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2681 endp = &iface->endpoint[i].desc;
2682 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2683 ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
2684 return endp;
2685 }
2686
2687 return NULL;
2688}
2689
2690/* Get the byte that describes which ports are enabled */
2691static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2692{
2693 int i;
2694 struct usb_host_interface *iface = intf->cur_altsetting;
2695
2696 if (iface->extralen == 3) {
2697 *ports = iface->extra[2];
2698 return 0;
2699 }
2700
2701 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2702 if (iface->endpoint[i].extralen == 3) {
2703 *ports = iface->endpoint[i].extra[2];
2704 return 0;
2705 }
2706 }
2707
2708 return -1;
2709}
2710
2711/* interrupt urb needs to be submitted, used for serial read of muxed port */
2712static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2713 struct usb_device *usb, gfp_t gfp)
2714{
2715 int result;
2716
2717 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2718 usb_rcvintpipe(usb,
2719 shared_int->intr_endp->bEndpointAddress & 0x7F),
2720 shared_int->shared_intr_buf,
2721 shared_int->intr_endp->wMaxPacketSize,
2722 intr_callback, shared_int,
2723 shared_int->intr_endp->bInterval);
2724
2725 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2726 if (result)
2727 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2728 result);
2729
2730 return result;
2731}
2732
2733/* operations setup of the serial interface */
6c59f569 2734static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 2735 .open = hso_serial_open,
2736 .close = hso_serial_close,
2737 .write = hso_serial_write,
2738 .write_room = hso_serial_write_room,
2739 .set_termios = hso_serial_set_termios,
2740 .chars_in_buffer = hso_serial_chars_in_buffer,
2741 .tiocmget = hso_serial_tiocmget,
2742 .tiocmset = hso_serial_tiocmset,
2743};
2744
2745static struct usb_driver hso_driver = {
2746 .name = driver_name,
2747 .probe = hso_probe,
2748 .disconnect = hso_disconnect,
2749 .id_table = hso_ids,
2750 .suspend = hso_suspend,
2751 .resume = hso_resume,
2752 .supports_autosuspend = 1,
2753};
2754
2755static int __init hso_init(void)
2756{
2757 int i;
2758 int result;
2759
2760 /* put it in the log */
2761 printk(KERN_INFO "hso: %s\n", version);
2762
2763 /* Initialise the serial table semaphore and table */
2764 spin_lock_init(&serial_table_lock);
2765 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2766 serial_table[i] = NULL;
2767
2768 /* allocate our driver using the proper amount of supported minors */
2769 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2770 if (!tty_drv)
2771 return -ENOMEM;
2772
2773 /* fill in all needed values */
2774 tty_drv->magic = TTY_DRIVER_MAGIC;
2775 tty_drv->owner = THIS_MODULE;
2776 tty_drv->driver_name = driver_name;
2777 tty_drv->name = tty_filename;
2778
2779 /* if major number is provided as parameter, use that one */
2780 if (tty_major)
2781 tty_drv->major = tty_major;
2782
2783 tty_drv->minor_start = 0;
2784 tty_drv->num = HSO_SERIAL_TTY_MINORS;
2785 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
2786 tty_drv->subtype = SERIAL_TYPE_NORMAL;
2787 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2788 tty_drv->init_termios = tty_std_termios;
2789 tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2790 tty_drv->termios = hso_serial_termios;
2791 tty_drv->termios_locked = hso_serial_termios_locked;
2792 tty_set_operations(tty_drv, &hso_serial_ops);
2793
2794 /* register the tty driver */
2795 result = tty_register_driver(tty_drv);
2796 if (result) {
2797 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
2798 __func__, result);
2799 return result;
2800 }
2801
2802 /* register this module as an usb driver */
2803 result = usb_register(&hso_driver);
2804 if (result) {
2805 printk(KERN_ERR "Could not register hso driver? error: %d\n",
2806 result);
2807 /* cleanup serial interface */
2808 tty_unregister_driver(tty_drv);
2809 return result;
2810 }
2811
2812 /* done */
2813 return 0;
2814}
2815
2816static void __exit hso_exit(void)
2817{
2818 printk(KERN_INFO "hso: unloaded\n");
2819
2820 tty_unregister_driver(tty_drv);
2821 /* deregister the usb driver */
2822 usb_deregister(&hso_driver);
2823}
2824
2825/* Module definitions */
2826module_init(hso_init);
2827module_exit(hso_exit);
2828
2829MODULE_AUTHOR(MOD_AUTHOR);
2830MODULE_DESCRIPTION(MOD_DESCRIPTION);
2831MODULE_LICENSE(MOD_LICENSE);
2832MODULE_INFO(Version, DRIVER_VERSION);
2833
2834/* change the debug level (eg: insmod hso.ko debug=0x04) */
2835MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
2836module_param(debug, int, S_IRUGO | S_IWUSR);
2837
2838/* set the major tty number (eg: insmod hso.ko tty_major=245) */
2839MODULE_PARM_DESC(tty_major, "Set the major tty number");
2840module_param(tty_major, int, S_IRUGO | S_IWUSR);
2841
2842/* disable network interface (eg: insmod hso.ko disable_net=1) */
2843MODULE_PARM_DESC(disable_net, "Disable the network interface");
2844module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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