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Staging: netwave: delete the driver
[linux/fpc-iii.git] / drivers / net / usb / hso.c
blobbe0cc99e881a6c4c41c8b8f502d0392f4be343e5
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define DRIVER_VERSION "1.2"
77 #define MOD_AUTHOR "Option Wireless"
78 #define MOD_DESCRIPTION "USB High Speed Option driver"
79 #define MOD_LICENSE "GPL"
80
81 #define HSO_MAX_NET_DEVICES 10
82 #define HSO__MAX_MTU 2048
83 #define DEFAULT_MTU 1500
84 #define DEFAULT_MRU 1500
85
86 #define CTRL_URB_RX_SIZE 1024
87 #define CTRL_URB_TX_SIZE 64
88
89 #define BULK_URB_RX_SIZE 4096
90 #define BULK_URB_TX_SIZE 8192
91
92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94 #define MUX_BULK_RX_BUF_COUNT 4
95 #define USB_TYPE_OPTION_VENDOR 0x20
96
97 /* These definitions are used with the struct hso_net flags element */
98 /* - use *_bit operations on it. (bit indices not values.) */
99 #define HSO_NET_RUNNING 0
100
101 #define HSO_NET_TX_TIMEOUT (HZ*10)
102
103 #define HSO_SERIAL_MAGIC 0x48534f31
104
105 /* Number of ttys to handle */
106 #define HSO_SERIAL_TTY_MINORS 256
107
108 #define MAX_RX_URBS 2
109
110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
111 {
112 if (tty)
113 return tty->driver_data;
114 return NULL;
115 }
116
117 /*****************************************************************************/
118 /* Debugging functions */
119 /*****************************************************************************/
120 #define D__(lvl_, fmt, arg...) \
121 do { \
122 printk(lvl_ "[%d:%s]: " fmt "\n", \
123 __LINE__, __func__, ## arg); \
124 } while (0)
125
126 #define D_(lvl, args...) \
127 do { \
128 if (lvl & debug) \
129 D__(KERN_INFO, args); \
130 } while (0)
131
132 #define D1(args...) D_(0x01, ##args)
133 #define D2(args...) D_(0x02, ##args)
134 #define D3(args...) D_(0x04, ##args)
135 #define D4(args...) D_(0x08, ##args)
136 #define D5(args...) D_(0x10, ##args)
137
138 /*****************************************************************************/
139 /* Enumerators */
140 /*****************************************************************************/
141 enum pkt_parse_state {
142 WAIT_IP,
143 WAIT_DATA,
144 WAIT_SYNC
145 };
146
147 /*****************************************************************************/
148 /* Structs */
149 /*****************************************************************************/
150
151 struct hso_shared_int {
152 struct usb_endpoint_descriptor *intr_endp;
153 void *shared_intr_buf;
154 struct urb *shared_intr_urb;
155 struct usb_device *usb;
156 int use_count;
157 int ref_count;
158 struct mutex shared_int_lock;
159 };
160
161 struct hso_net {
162 struct hso_device *parent;
163 struct net_device *net;
164 struct rfkill *rfkill;
165
166 struct usb_endpoint_descriptor *in_endp;
167 struct usb_endpoint_descriptor *out_endp;
168
169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
170 struct urb *mux_bulk_tx_urb;
171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
172 void *mux_bulk_tx_buf;
173
174 struct sk_buff *skb_rx_buf;
175 struct sk_buff *skb_tx_buf;
176
177 enum pkt_parse_state rx_parse_state;
178 spinlock_t net_lock;
179
180 unsigned short rx_buf_size;
181 unsigned short rx_buf_missing;
182 struct iphdr rx_ip_hdr;
183
184 unsigned long flags;
185 };
186
187 enum rx_ctrl_state{
188 RX_IDLE,
189 RX_SENT,
190 RX_PENDING
191 };
192
193 #define BM_REQUEST_TYPE (0xa1)
194 #define B_NOTIFICATION (0x20)
195 #define W_VALUE (0x0)
196 #define W_INDEX (0x2)
197 #define W_LENGTH (0x2)
198
199 #define B_OVERRUN (0x1<<6)
200 #define B_PARITY (0x1<<5)
201 #define B_FRAMING (0x1<<4)
202 #define B_RING_SIGNAL (0x1<<3)
203 #define B_BREAK (0x1<<2)
204 #define B_TX_CARRIER (0x1<<1)
205 #define B_RX_CARRIER (0x1<<0)
206
207 struct hso_serial_state_notification {
208 u8 bmRequestType;
209 u8 bNotification;
210 u16 wValue;
211 u16 wIndex;
212 u16 wLength;
213 u16 UART_state_bitmap;
214 } __attribute__((packed));
215
216 struct hso_tiocmget {
217 struct mutex mutex;
218 wait_queue_head_t waitq;
219 int intr_completed;
220 struct usb_endpoint_descriptor *endp;
221 struct urb *urb;
222 struct hso_serial_state_notification serial_state_notification;
223 u16 prev_UART_state_bitmap;
224 struct uart_icount icount;
225 };
226
227
228 struct hso_serial {
229 struct hso_device *parent;
230 int magic;
231 u8 minor;
232
233 struct hso_shared_int *shared_int;
234
235 /* rx/tx urb could be either a bulk urb or a control urb depending
236 on which serial port it is used on. */
237 struct urb *rx_urb[MAX_RX_URBS];
238 u8 num_rx_urbs;
239 u8 *rx_data[MAX_RX_URBS];
240 u16 rx_data_length; /* should contain allocated length */
241
242 struct urb *tx_urb;
243 u8 *tx_data;
244 u8 *tx_buffer;
245 u16 tx_data_length; /* should contain allocated length */
246 u16 tx_data_count;
247 u16 tx_buffer_count;
248 struct usb_ctrlrequest ctrl_req_tx;
249 struct usb_ctrlrequest ctrl_req_rx;
250
251 struct usb_endpoint_descriptor *in_endp;
252 struct usb_endpoint_descriptor *out_endp;
253
254 enum rx_ctrl_state rx_state;
255 u8 rts_state;
256 u8 dtr_state;
257 unsigned tx_urb_used:1;
258
259 /* from usb_serial_port */
260 struct tty_struct *tty;
261 int open_count;
262 spinlock_t serial_lock;
263
264 int (*write_data) (struct hso_serial *serial);
265 struct hso_tiocmget *tiocmget;
266 /* Hacks required to get flow control
267 * working on the serial receive buffers
268 * so as not to drop characters on the floor.
269 */
270 int curr_rx_urb_idx;
271 u16 curr_rx_urb_offset;
272 u8 rx_urb_filled[MAX_RX_URBS];
273 struct tasklet_struct unthrottle_tasklet;
274 struct work_struct retry_unthrottle_workqueue;
275 };
276
277 struct hso_device {
278 union {
279 struct hso_serial *dev_serial;
280 struct hso_net *dev_net;
281 } port_data;
282
283 u32 port_spec;
284
285 u8 is_active;
286 u8 usb_gone;
287 struct work_struct async_get_intf;
288 struct work_struct async_put_intf;
289 struct work_struct reset_device;
290
291 struct usb_device *usb;
292 struct usb_interface *interface;
293
294 struct device *dev;
295 struct kref ref;
296 struct mutex mutex;
297 };
298
299 /* Type of interface */
300 #define HSO_INTF_MASK 0xFF00
301 #define HSO_INTF_MUX 0x0100
302 #define HSO_INTF_BULK 0x0200
303
304 /* Type of port */
305 #define HSO_PORT_MASK 0xFF
306 #define HSO_PORT_NO_PORT 0x0
307 #define HSO_PORT_CONTROL 0x1
308 #define HSO_PORT_APP 0x2
309 #define HSO_PORT_GPS 0x3
310 #define HSO_PORT_PCSC 0x4
311 #define HSO_PORT_APP2 0x5
312 #define HSO_PORT_GPS_CONTROL 0x6
313 #define HSO_PORT_MSD 0x7
314 #define HSO_PORT_VOICE 0x8
315 #define HSO_PORT_DIAG2 0x9
316 #define HSO_PORT_DIAG 0x10
317 #define HSO_PORT_MODEM 0x11
318 #define HSO_PORT_NETWORK 0x12
319
320 /* Additional device info */
321 #define HSO_INFO_MASK 0xFF000000
322 #define HSO_INFO_CRC_BUG 0x01000000
323
324 /*****************************************************************************/
325 /* Prototypes */
326 /*****************************************************************************/
327 /* Serial driver functions */
328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
329 unsigned int set, unsigned int clear);
330 static void ctrl_callback(struct urb *urb);
331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
332 static void hso_kick_transmit(struct hso_serial *serial);
333 /* Helper functions */
334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
335 struct usb_device *usb, gfp_t gfp);
336 static void handle_usb_error(int status, const char *function,
337 struct hso_device *hso_dev);
338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
339 int type, int dir);
340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
341 static void hso_free_interface(struct usb_interface *intf);
342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
343 static int hso_stop_serial_device(struct hso_device *hso_dev);
344 static int hso_start_net_device(struct hso_device *hso_dev);
345 static void hso_free_shared_int(struct hso_shared_int *shared_int);
346 static int hso_stop_net_device(struct hso_device *hso_dev);
347 static void hso_serial_ref_free(struct kref *ref);
348 static void hso_std_serial_read_bulk_callback(struct urb *urb);
349 static int hso_mux_serial_read(struct hso_serial *serial);
350 static void async_get_intf(struct work_struct *data);
351 static void async_put_intf(struct work_struct *data);
352 static int hso_put_activity(struct hso_device *hso_dev);
353 static int hso_get_activity(struct hso_device *hso_dev);
354 static void tiocmget_intr_callback(struct urb *urb);
355 static void reset_device(struct work_struct *data);
356 /*****************************************************************************/
357 /* Helping functions */
358 /*****************************************************************************/
359
360 /* #define DEBUG */
361
362 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
363 {
364 return hso_dev->port_data.dev_net;
365 }
366
367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
368 {
369 return hso_dev->port_data.dev_serial;
370 }
371
372 /* Debugging functions */
373 #ifdef DEBUG
374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
375 unsigned int len)
376 {
377 static char name[255];
378
379 sprintf(name, "hso[%d:%s]", line_count, func_name);
380 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
381 }
382
383 #define DUMP(buf_, len_) \
384 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
385
386 #define DUMP1(buf_, len_) \
387 do { \
388 if (0x01 & debug) \
389 DUMP(buf_, len_); \
390 } while (0)
391 #else
392 #define DUMP(buf_, len_)
393 #define DUMP1(buf_, len_)
394 #endif
395
396 /* module parameters */
397 static int debug;
398 static int tty_major;
399 static int disable_net;
400
401 /* driver info */
402 static const char driver_name[] = "hso";
403 static const char tty_filename[] = "ttyHS";
404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
405 /* the usb driver itself (registered in hso_init) */
406 static struct usb_driver hso_driver;
407 /* serial structures */
408 static struct tty_driver *tty_drv;
409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
411 static spinlock_t serial_table_lock;
412
413 static const s32 default_port_spec[] = {
414 HSO_INTF_MUX | HSO_PORT_NETWORK,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 HSO_INTF_BULK | HSO_PORT_MODEM,
417 0
418 };
419
420 static const s32 icon321_port_spec[] = {
421 HSO_INTF_MUX | HSO_PORT_NETWORK,
422 HSO_INTF_BULK | HSO_PORT_DIAG2,
423 HSO_INTF_BULK | HSO_PORT_MODEM,
424 HSO_INTF_BULK | HSO_PORT_DIAG,
425 0
426 };
427
428 #define default_port_device(vendor, product) \
429 USB_DEVICE(vendor, product), \
430 .driver_info = (kernel_ulong_t)default_port_spec
431
432 #define icon321_port_device(vendor, product) \
433 USB_DEVICE(vendor, product), \
434 .driver_info = (kernel_ulong_t)icon321_port_spec
435
436 /* list of devices we support */
437 static const struct usb_device_id hso_ids[] = {
438 {default_port_device(0x0af0, 0x6711)},
439 {default_port_device(0x0af0, 0x6731)},
440 {default_port_device(0x0af0, 0x6751)},
441 {default_port_device(0x0af0, 0x6771)},
442 {default_port_device(0x0af0, 0x6791)},
443 {default_port_device(0x0af0, 0x6811)},
444 {default_port_device(0x0af0, 0x6911)},
445 {default_port_device(0x0af0, 0x6951)},
446 {default_port_device(0x0af0, 0x6971)},
447 {default_port_device(0x0af0, 0x7011)},
448 {default_port_device(0x0af0, 0x7031)},
449 {default_port_device(0x0af0, 0x7051)},
450 {default_port_device(0x0af0, 0x7071)},
451 {default_port_device(0x0af0, 0x7111)},
452 {default_port_device(0x0af0, 0x7211)},
453 {default_port_device(0x0af0, 0x7251)},
454 {default_port_device(0x0af0, 0x7271)},
455 {default_port_device(0x0af0, 0x7311)},
456 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
457 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
458 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
459 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
460 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
461 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
462 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
463 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
464 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
465 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
466 {USB_DEVICE(0x0af0, 0x7701)},
467 {USB_DEVICE(0x0af0, 0x7706)},
468 {USB_DEVICE(0x0af0, 0x7801)},
469 {USB_DEVICE(0x0af0, 0x7901)},
470 {USB_DEVICE(0x0af0, 0x7A01)},
471 {USB_DEVICE(0x0af0, 0x7A05)},
472 {USB_DEVICE(0x0af0, 0x8200)},
473 {USB_DEVICE(0x0af0, 0x8201)},
474 {USB_DEVICE(0x0af0, 0x8300)},
475 {USB_DEVICE(0x0af0, 0x8302)},
476 {USB_DEVICE(0x0af0, 0x8304)},
477 {USB_DEVICE(0x0af0, 0x8400)},
478 {USB_DEVICE(0x0af0, 0xd035)},
479 {USB_DEVICE(0x0af0, 0xd055)},
480 {USB_DEVICE(0x0af0, 0xd155)},
481 {USB_DEVICE(0x0af0, 0xd255)},
482 {USB_DEVICE(0x0af0, 0xd057)},
483 {USB_DEVICE(0x0af0, 0xd157)},
484 {USB_DEVICE(0x0af0, 0xd257)},
485 {USB_DEVICE(0x0af0, 0xd357)},
486 {USB_DEVICE(0x0af0, 0xd058)},
487 {USB_DEVICE(0x0af0, 0xc100)},
488 {}
489 };
490 MODULE_DEVICE_TABLE(usb, hso_ids);
491
492 /* Sysfs attribute */
493 static ssize_t hso_sysfs_show_porttype(struct device *dev,
494 struct device_attribute *attr,
495 char *buf)
496 {
497 struct hso_device *hso_dev = dev_get_drvdata(dev);
498 char *port_name;
499
500 if (!hso_dev)
501 return 0;
502
503 switch (hso_dev->port_spec & HSO_PORT_MASK) {
504 case HSO_PORT_CONTROL:
505 port_name = "Control";
506 break;
507 case HSO_PORT_APP:
508 port_name = "Application";
509 break;
510 case HSO_PORT_APP2:
511 port_name = "Application2";
512 break;
513 case HSO_PORT_GPS:
514 port_name = "GPS";
515 break;
516 case HSO_PORT_GPS_CONTROL:
517 port_name = "GPS Control";
518 break;
519 case HSO_PORT_PCSC:
520 port_name = "PCSC";
521 break;
522 case HSO_PORT_DIAG:
523 port_name = "Diagnostic";
524 break;
525 case HSO_PORT_DIAG2:
526 port_name = "Diagnostic2";
527 break;
528 case HSO_PORT_MODEM:
529 port_name = "Modem";
530 break;
531 case HSO_PORT_NETWORK:
532 port_name = "Network";
533 break;
534 default:
535 port_name = "Unknown";
536 break;
537 }
538
539 return sprintf(buf, "%s\n", port_name);
540 }
541 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
542
543 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
544 {
545 int idx;
546
547 for (idx = 0; idx < serial->num_rx_urbs; idx++)
548 if (serial->rx_urb[idx] == urb)
549 return idx;
550 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
551 return -1;
552 }
553
554 /* converts mux value to a port spec value */
555 static u32 hso_mux_to_port(int mux)
556 {
557 u32 result;
558
559 switch (mux) {
560 case 0x1:
561 result = HSO_PORT_CONTROL;
562 break;
563 case 0x2:
564 result = HSO_PORT_APP;
565 break;
566 case 0x4:
567 result = HSO_PORT_PCSC;
568 break;
569 case 0x8:
570 result = HSO_PORT_GPS;
571 break;
572 case 0x10:
573 result = HSO_PORT_APP2;
574 break;
575 default:
576 result = HSO_PORT_NO_PORT;
577 }
578 return result;
579 }
580
581 /* converts port spec value to a mux value */
582 static u32 hso_port_to_mux(int port)
583 {
584 u32 result;
585
586 switch (port & HSO_PORT_MASK) {
587 case HSO_PORT_CONTROL:
588 result = 0x0;
589 break;
590 case HSO_PORT_APP:
591 result = 0x1;
592 break;
593 case HSO_PORT_PCSC:
594 result = 0x2;
595 break;
596 case HSO_PORT_GPS:
597 result = 0x3;
598 break;
599 case HSO_PORT_APP2:
600 result = 0x4;
601 break;
602 default:
603 result = 0x0;
604 }
605 return result;
606 }
607
608 static struct hso_serial *get_serial_by_shared_int_and_type(
609 struct hso_shared_int *shared_int,
610 int mux)
611 {
612 int i, port;
613
614 port = hso_mux_to_port(mux);
615
616 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
617 if (serial_table[i] &&
618 (dev2ser(serial_table[i])->shared_int == shared_int) &&
619 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
620 return dev2ser(serial_table[i]);
621 }
622 }
623
624 return NULL;
625 }
626
627 static struct hso_serial *get_serial_by_index(unsigned index)
628 {
629 struct hso_serial *serial = NULL;
630 unsigned long flags;
631
632 spin_lock_irqsave(&serial_table_lock, flags);
633 if (serial_table[index])
634 serial = dev2ser(serial_table[index]);
635 spin_unlock_irqrestore(&serial_table_lock, flags);
636
637 return serial;
638 }
639
640 static int get_free_serial_index(void)
641 {
642 int index;
643 unsigned long flags;
644
645 spin_lock_irqsave(&serial_table_lock, flags);
646 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
647 if (serial_table[index] == NULL) {
648 spin_unlock_irqrestore(&serial_table_lock, flags);
649 return index;
650 }
651 }
652 spin_unlock_irqrestore(&serial_table_lock, flags);
653
654 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
655 return -1;
656 }
657
658 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
659 {
660 unsigned long flags;
661
662 spin_lock_irqsave(&serial_table_lock, flags);
663 if (serial)
664 serial_table[index] = serial->parent;
665 else
666 serial_table[index] = NULL;
667 spin_unlock_irqrestore(&serial_table_lock, flags);
668 }
669
670 static void handle_usb_error(int status, const char *function,
671 struct hso_device *hso_dev)
672 {
673 char *explanation;
674
675 switch (status) {
676 case -ENODEV:
677 explanation = "no device";
678 break;
679 case -ENOENT:
680 explanation = "endpoint not enabled";
681 break;
682 case -EPIPE:
683 explanation = "endpoint stalled";
684 break;
685 case -ENOSPC:
686 explanation = "not enough bandwidth";
687 break;
688 case -ESHUTDOWN:
689 explanation = "device disabled";
690 break;
691 case -EHOSTUNREACH:
692 explanation = "device suspended";
693 break;
694 case -EINVAL:
695 case -EAGAIN:
696 case -EFBIG:
697 case -EMSGSIZE:
698 explanation = "internal error";
699 break;
700 case -EILSEQ:
701 case -EPROTO:
702 case -ETIME:
703 case -ETIMEDOUT:
704 explanation = "protocol error";
705 if (hso_dev)
706 schedule_work(&hso_dev->reset_device);
707 break;
708 default:
709 explanation = "unknown status";
710 break;
711 }
712
713 /* log a meaningful explanation of an USB status */
714 D1("%s: received USB status - %s (%d)", function, explanation, status);
715 }
716
717 /* Network interface functions */
718
719 /* called when net interface is brought up by ifconfig */
720 static int hso_net_open(struct net_device *net)
721 {
722 struct hso_net *odev = netdev_priv(net);
723 unsigned long flags = 0;
724
725 if (!odev) {
726 dev_err(&net->dev, "No net device !\n");
727 return -ENODEV;
728 }
729
730 odev->skb_tx_buf = NULL;
731
732 /* setup environment */
733 spin_lock_irqsave(&odev->net_lock, flags);
734 odev->rx_parse_state = WAIT_IP;
735 odev->rx_buf_size = 0;
736 odev->rx_buf_missing = sizeof(struct iphdr);
737 spin_unlock_irqrestore(&odev->net_lock, flags);
738
739 /* We are up and running. */
740 set_bit(HSO_NET_RUNNING, &odev->flags);
741 hso_start_net_device(odev->parent);
742
743 /* Tell the kernel we are ready to start receiving from it */
744 netif_start_queue(net);
745
746 return 0;
747 }
748
749 /* called when interface is brought down by ifconfig */
750 static int hso_net_close(struct net_device *net)
751 {
752 struct hso_net *odev = netdev_priv(net);
753
754 /* we don't need the queue anymore */
755 netif_stop_queue(net);
756 /* no longer running */
757 clear_bit(HSO_NET_RUNNING, &odev->flags);
758
759 hso_stop_net_device(odev->parent);
760
761 /* done */
762 return 0;
763 }
764
765 /* USB tells is xmit done, we should start the netqueue again */
766 static void write_bulk_callback(struct urb *urb)
767 {
768 struct hso_net *odev = urb->context;
769 int status = urb->status;
770
771 /* Sanity check */
772 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
773 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
774 return;
775 }
776
777 /* Do we still have a valid kernel network device? */
778 if (!netif_device_present(odev->net)) {
779 dev_err(&urb->dev->dev, "%s: net device not present\n",
780 __func__);
781 return;
782 }
783
784 /* log status, but don't act on it, we don't need to resubmit anything
785 * anyhow */
786 if (status)
787 handle_usb_error(status, __func__, odev->parent);
788
789 hso_put_activity(odev->parent);
790
791 /* Tell the network interface we are ready for another frame */
792 netif_wake_queue(odev->net);
793 }
794
795 /* called by kernel when we need to transmit a packet */
796 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
797 struct net_device *net)
798 {
799 struct hso_net *odev = netdev_priv(net);
800 int result;
801
802 /* Tell the kernel, "No more frames 'til we are done with this one." */
803 netif_stop_queue(net);
804 if (hso_get_activity(odev->parent) == -EAGAIN) {
805 odev->skb_tx_buf = skb;
806 return NETDEV_TX_OK;
807 }
808
809 /* log if asked */
810 DUMP1(skb->data, skb->len);
811 /* Copy it from kernel memory to OUR memory */
812 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
813 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
814
815 /* Fill in the URB for shipping it out. */
816 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
817 odev->parent->usb,
818 usb_sndbulkpipe(odev->parent->usb,
819 odev->out_endp->
820 bEndpointAddress & 0x7F),
821 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
822 odev);
823
824 /* Deal with the Zero Length packet problem, I hope */
825 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
826
827 /* Send the URB on its merry way. */
828 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
829 if (result) {
830 dev_warn(&odev->parent->interface->dev,
831 "failed mux_bulk_tx_urb %d\n", result);
832 net->stats.tx_errors++;
833 netif_start_queue(net);
834 } else {
835 net->stats.tx_packets++;
836 net->stats.tx_bytes += skb->len;
837 /* And tell the kernel when the last transmit started. */
838 net->trans_start = jiffies;
839 }
840 dev_kfree_skb(skb);
841 /* we're done */
842 return NETDEV_TX_OK;
843 }
844
845 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
846 {
847 struct hso_net *odev = netdev_priv(net);
848
849 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
850 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
851 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
852 }
853
854 static const struct ethtool_ops ops = {
855 .get_drvinfo = hso_get_drvinfo,
856 .get_link = ethtool_op_get_link
857 };
858
859 /* called when a packet did not ack after watchdogtimeout */
860 static void hso_net_tx_timeout(struct net_device *net)
861 {
862 struct hso_net *odev = netdev_priv(net);
863
864 if (!odev)
865 return;
866
867 /* Tell syslog we are hosed. */
868 dev_warn(&net->dev, "Tx timed out.\n");
869
870 /* Tear the waiting frame off the list */
871 if (odev->mux_bulk_tx_urb &&
872 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
873 usb_unlink_urb(odev->mux_bulk_tx_urb);
874
875 /* Update statistics */
876 net->stats.tx_errors++;
877 }
878
879 /* make a real packet from the received USB buffer */
880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
881 unsigned int count, unsigned char is_eop)
882 {
883 unsigned short temp_bytes;
884 unsigned short buffer_offset = 0;
885 unsigned short frame_len;
886 unsigned char *tmp_rx_buf;
887
888 /* log if needed */
889 D1("Rx %d bytes", count);
890 DUMP(ip_pkt, min(128, (int)count));
891
892 while (count) {
893 switch (odev->rx_parse_state) {
894 case WAIT_IP:
895 /* waiting for IP header. */
896 /* wanted bytes - size of ip header */
897 temp_bytes =
898 (count <
899 odev->rx_buf_missing) ? count : odev->
900 rx_buf_missing;
901
902 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
903 odev->rx_buf_size, ip_pkt + buffer_offset,
904 temp_bytes);
905
906 odev->rx_buf_size += temp_bytes;
907 buffer_offset += temp_bytes;
908 odev->rx_buf_missing -= temp_bytes;
909 count -= temp_bytes;
910
911 if (!odev->rx_buf_missing) {
912 /* header is complete allocate an sk_buffer and
913 * continue to WAIT_DATA */
914 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
915
916 if ((frame_len > DEFAULT_MRU) ||
917 (frame_len < sizeof(struct iphdr))) {
918 dev_err(&odev->net->dev,
919 "Invalid frame (%d) length\n",
920 frame_len);
921 odev->rx_parse_state = WAIT_SYNC;
922 continue;
923 }
924 /* Allocate an sk_buff */
925 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
926 frame_len);
927 if (!odev->skb_rx_buf) {
928 /* We got no receive buffer. */
929 D1("could not allocate memory");
930 odev->rx_parse_state = WAIT_SYNC;
931 return;
932 }
933
934 /* Copy what we got so far. make room for iphdr
935 * after tail. */
936 tmp_rx_buf =
937 skb_put(odev->skb_rx_buf,
938 sizeof(struct iphdr));
939 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
940 sizeof(struct iphdr));
941
942 /* ETH_HLEN */
943 odev->rx_buf_size = sizeof(struct iphdr);
944
945 /* Filip actually use .tot_len */
946 odev->rx_buf_missing =
947 frame_len - sizeof(struct iphdr);
948 odev->rx_parse_state = WAIT_DATA;
949 }
950 break;
951
952 case WAIT_DATA:
953 temp_bytes = (count < odev->rx_buf_missing)
954 ? count : odev->rx_buf_missing;
955
956 /* Copy the rest of the bytes that are left in the
957 * buffer into the waiting sk_buf. */
958 /* Make room for temp_bytes after tail. */
959 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
960 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
961
962 odev->rx_buf_missing -= temp_bytes;
963 count -= temp_bytes;
964 buffer_offset += temp_bytes;
965 odev->rx_buf_size += temp_bytes;
966 if (!odev->rx_buf_missing) {
967 /* Packet is complete. Inject into stack. */
968 /* We have IP packet here */
969 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
970 /* don't check it */
971 odev->skb_rx_buf->ip_summed =
972 CHECKSUM_UNNECESSARY;
973
974 skb_reset_mac_header(odev->skb_rx_buf);
975
976 /* Ship it off to the kernel */
977 netif_rx(odev->skb_rx_buf);
978 /* No longer our buffer. */
979 odev->skb_rx_buf = NULL;
980
981 /* update out statistics */
982 odev->net->stats.rx_packets++;
983
984 odev->net->stats.rx_bytes += odev->rx_buf_size;
985
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 odev->rx_parse_state = WAIT_IP;
989 }
990 break;
991
992 case WAIT_SYNC:
993 D1(" W_S");
994 count = 0;
995 break;
996 default:
997 D1(" ");
998 count--;
999 break;
1000 }
1001 }
1002
1003 /* Recovery mechanism for WAIT_SYNC state. */
1004 if (is_eop) {
1005 if (odev->rx_parse_state == WAIT_SYNC) {
1006 odev->rx_parse_state = WAIT_IP;
1007 odev->rx_buf_size = 0;
1008 odev->rx_buf_missing = sizeof(struct iphdr);
1009 }
1010 }
1011 }
1012
1013 /* Moving data from usb to kernel (in interrupt state) */
1014 static void read_bulk_callback(struct urb *urb)
1015 {
1016 struct hso_net *odev = urb->context;
1017 struct net_device *net;
1018 int result;
1019 int status = urb->status;
1020
1021 /* is al ok? (Filip: Who's Al ?) */
1022 if (status) {
1023 handle_usb_error(status, __func__, odev->parent);
1024 return;
1025 }
1026
1027 /* Sanity check */
1028 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1029 D1("BULK IN callback but driver is not active!");
1030 return;
1031 }
1032 usb_mark_last_busy(urb->dev);
1033
1034 net = odev->net;
1035
1036 if (!netif_device_present(net)) {
1037 /* Somebody killed our network interface... */
1038 return;
1039 }
1040
1041 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1042 u32 rest;
1043 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1044 rest = urb->actual_length %
1045 le16_to_cpu(odev->in_endp->wMaxPacketSize);
1046 if (((rest == 5) || (rest == 6)) &&
1047 !memcmp(((u8 *) urb->transfer_buffer) +
1048 urb->actual_length - 4, crc_check, 4)) {
1049 urb->actual_length -= 4;
1050 }
1051 }
1052
1053 /* do we even have a packet? */
1054 if (urb->actual_length) {
1055 /* Handle the IP stream, add header and push it onto network
1056 * stack if the packet is complete. */
1057 spin_lock(&odev->net_lock);
1058 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1059 (urb->transfer_buffer_length >
1060 urb->actual_length) ? 1 : 0);
1061 spin_unlock(&odev->net_lock);
1062 }
1063
1064 /* We are done with this URB, resubmit it. Prep the USB to wait for
1065 * another frame. Reuse same as received. */
1066 usb_fill_bulk_urb(urb,
1067 odev->parent->usb,
1068 usb_rcvbulkpipe(odev->parent->usb,
1069 odev->in_endp->
1070 bEndpointAddress & 0x7F),
1071 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1072 read_bulk_callback, odev);
1073
1074 /* Give this to the USB subsystem so it can tell us when more data
1075 * arrives. */
1076 result = usb_submit_urb(urb, GFP_ATOMIC);
1077 if (result)
1078 dev_warn(&odev->parent->interface->dev,
1079 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1080 result);
1081 }
1082
1083 /* Serial driver functions */
1084
1085 static void hso_init_termios(struct ktermios *termios)
1086 {
1087 /*
1088 * The default requirements for this device are:
1089 */
1090 termios->c_iflag &=
1091 ~(IGNBRK /* disable ignore break */
1092 | BRKINT /* disable break causes interrupt */
1093 | PARMRK /* disable mark parity errors */
1094 | ISTRIP /* disable clear high bit of input characters */
1095 | INLCR /* disable translate NL to CR */
1096 | IGNCR /* disable ignore CR */
1097 | ICRNL /* disable translate CR to NL */
1098 | IXON); /* disable enable XON/XOFF flow control */
1099
1100 /* disable postprocess output characters */
1101 termios->c_oflag &= ~OPOST;
1102
1103 termios->c_lflag &=
1104 ~(ECHO /* disable echo input characters */
1105 | ECHONL /* disable echo new line */
1106 | ICANON /* disable erase, kill, werase, and rprnt
1107 special characters */
1108 | ISIG /* disable interrupt, quit, and suspend special
1109 characters */
1110 | IEXTEN); /* disable non-POSIX special characters */
1111
1112 termios->c_cflag &=
1113 ~(CSIZE /* no size */
1114 | PARENB /* disable parity bit */
1115 | CBAUD /* clear current baud rate */
1116 | CBAUDEX); /* clear current buad rate */
1117
1118 termios->c_cflag |= CS8; /* character size 8 bits */
1119
1120 /* baud rate 115200 */
1121 tty_termios_encode_baud_rate(termios, 115200, 115200);
1122 }
1123
1124 static void _hso_serial_set_termios(struct tty_struct *tty,
1125 struct ktermios *old)
1126 {
1127 struct hso_serial *serial = get_serial_by_tty(tty);
1128 struct ktermios *termios;
1129
1130 if (!serial) {
1131 printk(KERN_ERR "%s: no tty structures", __func__);
1132 return;
1133 }
1134
1135 D4("port %d", serial->minor);
1136
1137 /*
1138 * Fix up unsupported bits
1139 */
1140 termios = tty->termios;
1141 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1142
1143 termios->c_cflag &=
1144 ~(CSIZE /* no size */
1145 | PARENB /* disable parity bit */
1146 | CBAUD /* clear current baud rate */
1147 | CBAUDEX); /* clear current buad rate */
1148
1149 termios->c_cflag |= CS8; /* character size 8 bits */
1150
1151 /* baud rate 115200 */
1152 tty_encode_baud_rate(tty, 115200, 115200);
1153 }
1154
1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1156 {
1157 int result;
1158 /* We are done with this URB, resubmit it. Prep the USB to wait for
1159 * another frame */
1160 usb_fill_bulk_urb(urb, serial->parent->usb,
1161 usb_rcvbulkpipe(serial->parent->usb,
1162 serial->in_endp->
1163 bEndpointAddress & 0x7F),
1164 urb->transfer_buffer, serial->rx_data_length,
1165 hso_std_serial_read_bulk_callback, serial);
1166 /* Give this to the USB subsystem so it can tell us when more data
1167 * arrives. */
1168 result = usb_submit_urb(urb, GFP_ATOMIC);
1169 if (result) {
1170 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1171 __func__, result);
1172 }
1173 }
1174
1175
1176
1177
1178 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1179 {
1180 int count;
1181 struct urb *curr_urb;
1182
1183 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1184 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1185 count = put_rxbuf_data(curr_urb, serial);
1186 if (count == -1)
1187 return;
1188 if (count == 0) {
1189 serial->curr_rx_urb_idx++;
1190 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1191 serial->curr_rx_urb_idx = 0;
1192 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1193 }
1194 }
1195 }
1196
1197 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1198 {
1199 int count = 0;
1200 struct urb *urb;
1201
1202 urb = serial->rx_urb[0];
1203 if (serial->open_count > 0) {
1204 count = put_rxbuf_data(urb, serial);
1205 if (count == -1)
1206 return;
1207 }
1208 /* Re issue a read as long as we receive data. */
1209
1210 if (count == 0 && ((urb->actual_length != 0) ||
1211 (serial->rx_state == RX_PENDING))) {
1212 serial->rx_state = RX_SENT;
1213 hso_mux_serial_read(serial);
1214 } else
1215 serial->rx_state = RX_IDLE;
1216 }
1217
1218
1219 /* read callback for Diag and CS port */
1220 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1221 {
1222 struct hso_serial *serial = urb->context;
1223 int status = urb->status;
1224
1225 /* sanity check */
1226 if (!serial) {
1227 D1("serial == NULL");
1228 return;
1229 } else if (status) {
1230 handle_usb_error(status, __func__, serial->parent);
1231 return;
1232 }
1233
1234 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1235 D1("Actual length = %d\n", urb->actual_length);
1236 DUMP1(urb->transfer_buffer, urb->actual_length);
1237
1238 /* Anyone listening? */
1239 if (serial->open_count == 0)
1240 return;
1241
1242 if (status == 0) {
1243 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1244 u32 rest;
1245 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1246 rest =
1247 urb->actual_length %
1248 le16_to_cpu(serial->in_endp->wMaxPacketSize);
1249 if (((rest == 5) || (rest == 6)) &&
1250 !memcmp(((u8 *) urb->transfer_buffer) +
1251 urb->actual_length - 4, crc_check, 4)) {
1252 urb->actual_length -= 4;
1253 }
1254 }
1255 /* Valid data, handle RX data */
1256 spin_lock(&serial->serial_lock);
1257 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1258 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1259 spin_unlock(&serial->serial_lock);
1260 } else if (status == -ENOENT || status == -ECONNRESET) {
1261 /* Unlinked - check for throttled port. */
1262 D2("Port %d, successfully unlinked urb", serial->minor);
1263 spin_lock(&serial->serial_lock);
1264 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1265 hso_resubmit_rx_bulk_urb(serial, urb);
1266 spin_unlock(&serial->serial_lock);
1267 } else {
1268 D2("Port %d, status = %d for read urb", serial->minor, status);
1269 return;
1270 }
1271 }
1272
1273 /*
1274 * This needs to be a tasklet otherwise we will
1275 * end up recursively calling this function.
1276 */
1277 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1278 {
1279 unsigned long flags;
1280
1281 spin_lock_irqsave(&serial->serial_lock, flags);
1282 if ((serial->parent->port_spec & HSO_INTF_MUX))
1283 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1284 else
1285 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1286 spin_unlock_irqrestore(&serial->serial_lock, flags);
1287 }
1288
1289 static void hso_unthrottle(struct tty_struct *tty)
1290 {
1291 struct hso_serial *serial = get_serial_by_tty(tty);
1292
1293 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1294 }
1295
1296 static void hso_unthrottle_workfunc(struct work_struct *work)
1297 {
1298 struct hso_serial *serial =
1299 container_of(work, struct hso_serial,
1300 retry_unthrottle_workqueue);
1301 hso_unthrottle_tasklet(serial);
1302 }
1303
1304 /* open the requested serial port */
1305 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1306 {
1307 struct hso_serial *serial = get_serial_by_index(tty->index);
1308 int result;
1309
1310 /* sanity check */
1311 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1312 WARN_ON(1);
1313 tty->driver_data = NULL;
1314 D1("Failed to open port");
1315 return -ENODEV;
1316 }
1317
1318 mutex_lock(&serial->parent->mutex);
1319 result = usb_autopm_get_interface(serial->parent->interface);
1320 if (result < 0)
1321 goto err_out;
1322
1323 D1("Opening %d", serial->minor);
1324 kref_get(&serial->parent->ref);
1325
1326 /* setup */
1327 spin_lock_irq(&serial->serial_lock);
1328 tty->driver_data = serial;
1329 tty_kref_put(serial->tty);
1330 serial->tty = tty_kref_get(tty);
1331 spin_unlock_irq(&serial->serial_lock);
1332
1333 /* check for port already opened, if not set the termios */
1334 serial->open_count++;
1335 if (serial->open_count == 1) {
1336 tty->low_latency = 1;
1337 serial->rx_state = RX_IDLE;
1338 /* Force default termio settings */
1339 _hso_serial_set_termios(tty, NULL);
1340 tasklet_init(&serial->unthrottle_tasklet,
1341 (void (*)(unsigned long))hso_unthrottle_tasklet,
1342 (unsigned long)serial);
1343 INIT_WORK(&serial->retry_unthrottle_workqueue,
1344 hso_unthrottle_workfunc);
1345 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1346 if (result) {
1347 hso_stop_serial_device(serial->parent);
1348 serial->open_count--;
1349 kref_put(&serial->parent->ref, hso_serial_ref_free);
1350 }
1351 } else {
1352 D1("Port was already open");
1353 }
1354
1355 usb_autopm_put_interface(serial->parent->interface);
1356
1357 /* done */
1358 if (result)
1359 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1360 err_out:
1361 mutex_unlock(&serial->parent->mutex);
1362 return result;
1363 }
1364
1365 /* close the requested serial port */
1366 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1367 {
1368 struct hso_serial *serial = tty->driver_data;
1369 u8 usb_gone;
1370
1371 D1("Closing serial port");
1372
1373 /* Open failed, no close cleanup required */
1374 if (serial == NULL)
1375 return;
1376
1377 mutex_lock(&serial->parent->mutex);
1378 usb_gone = serial->parent->usb_gone;
1379
1380 if (!usb_gone)
1381 usb_autopm_get_interface(serial->parent->interface);
1382
1383 /* reset the rts and dtr */
1384 /* do the actual close */
1385 serial->open_count--;
1386
1387 if (serial->open_count <= 0) {
1388 serial->open_count = 0;
1389 spin_lock_irq(&serial->serial_lock);
1390 if (serial->tty == tty) {
1391 serial->tty->driver_data = NULL;
1392 serial->tty = NULL;
1393 tty_kref_put(tty);
1394 }
1395 spin_unlock_irq(&serial->serial_lock);
1396 if (!usb_gone)
1397 hso_stop_serial_device(serial->parent);
1398 tasklet_kill(&serial->unthrottle_tasklet);
1399 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1400 }
1401
1402 if (!usb_gone)
1403 usb_autopm_put_interface(serial->parent->interface);
1404
1405 mutex_unlock(&serial->parent->mutex);
1406
1407 kref_put(&serial->parent->ref, hso_serial_ref_free);
1408 }
1409
1410 /* close the requested serial port */
1411 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1412 int count)
1413 {
1414 struct hso_serial *serial = get_serial_by_tty(tty);
1415 int space, tx_bytes;
1416 unsigned long flags;
1417
1418 /* sanity check */
1419 if (serial == NULL) {
1420 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1421 return -ENODEV;
1422 }
1423
1424 spin_lock_irqsave(&serial->serial_lock, flags);
1425
1426 space = serial->tx_data_length - serial->tx_buffer_count;
1427 tx_bytes = (count < space) ? count : space;
1428
1429 if (!tx_bytes)
1430 goto out;
1431
1432 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1433 serial->tx_buffer_count += tx_bytes;
1434
1435 out:
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 hso_kick_transmit(serial);
1439 /* done */
1440 return tx_bytes;
1441 }
1442
1443 /* how much room is there for writing */
1444 static int hso_serial_write_room(struct tty_struct *tty)
1445 {
1446 struct hso_serial *serial = get_serial_by_tty(tty);
1447 int room;
1448 unsigned long flags;
1449
1450 spin_lock_irqsave(&serial->serial_lock, flags);
1451 room = serial->tx_data_length - serial->tx_buffer_count;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 /* return free room */
1455 return room;
1456 }
1457
1458 /* setup the term */
1459 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1460 {
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 unsigned long flags;
1463
1464 if (old)
1465 D5("Termios called with: cflags new[%d] - old[%d]",
1466 tty->termios->c_cflag, old->c_cflag);
1467
1468 /* the actual setup */
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 if (serial->open_count)
1471 _hso_serial_set_termios(tty, old);
1472 else
1473 tty->termios = old;
1474 spin_unlock_irqrestore(&serial->serial_lock, flags);
1475
1476 /* done */
1477 return;
1478 }
1479
1480 /* how many characters in the buffer */
1481 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1482 {
1483 struct hso_serial *serial = get_serial_by_tty(tty);
1484 int chars;
1485 unsigned long flags;
1486
1487 /* sanity check */
1488 if (serial == NULL)
1489 return 0;
1490
1491 spin_lock_irqsave(&serial->serial_lock, flags);
1492 chars = serial->tx_buffer_count;
1493 spin_unlock_irqrestore(&serial->serial_lock, flags);
1494
1495 return chars;
1496 }
1497 static int tiocmget_submit_urb(struct hso_serial *serial,
1498 struct hso_tiocmget *tiocmget,
1499 struct usb_device *usb)
1500 {
1501 int result;
1502
1503 if (serial->parent->usb_gone)
1504 return -ENODEV;
1505 usb_fill_int_urb(tiocmget->urb, usb,
1506 usb_rcvintpipe(usb,
1507 tiocmget->endp->
1508 bEndpointAddress & 0x7F),
1509 &tiocmget->serial_state_notification,
1510 sizeof(struct hso_serial_state_notification),
1511 tiocmget_intr_callback, serial,
1512 tiocmget->endp->bInterval);
1513 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1514 if (result) {
1515 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1516 result);
1517 }
1518 return result;
1519
1520 }
1521
1522 static void tiocmget_intr_callback(struct urb *urb)
1523 {
1524 struct hso_serial *serial = urb->context;
1525 struct hso_tiocmget *tiocmget;
1526 int status = urb->status;
1527 u16 UART_state_bitmap, prev_UART_state_bitmap;
1528 struct uart_icount *icount;
1529 struct hso_serial_state_notification *serial_state_notification;
1530 struct usb_device *usb;
1531
1532 /* Sanity checks */
1533 if (!serial)
1534 return;
1535 if (status) {
1536 handle_usb_error(status, __func__, serial->parent);
1537 return;
1538 }
1539 tiocmget = serial->tiocmget;
1540 if (!tiocmget)
1541 return;
1542 usb = serial->parent->usb;
1543 serial_state_notification = &tiocmget->serial_state_notification;
1544 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1545 serial_state_notification->bNotification != B_NOTIFICATION ||
1546 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1547 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1548 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1549 dev_warn(&usb->dev,
1550 "hso received invalid serial state notification\n");
1551 DUMP(serial_state_notification,
1552 sizeof(struct hso_serial_state_notification));
1553 } else {
1554
1555 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1556 UART_state_bitmap);
1557 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1558 icount = &tiocmget->icount;
1559 spin_lock(&serial->serial_lock);
1560 if ((UART_state_bitmap & B_OVERRUN) !=
1561 (prev_UART_state_bitmap & B_OVERRUN))
1562 icount->parity++;
1563 if ((UART_state_bitmap & B_PARITY) !=
1564 (prev_UART_state_bitmap & B_PARITY))
1565 icount->parity++;
1566 if ((UART_state_bitmap & B_FRAMING) !=
1567 (prev_UART_state_bitmap & B_FRAMING))
1568 icount->frame++;
1569 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1570 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1571 icount->rng++;
1572 if ((UART_state_bitmap & B_BREAK) !=
1573 (prev_UART_state_bitmap & B_BREAK))
1574 icount->brk++;
1575 if ((UART_state_bitmap & B_TX_CARRIER) !=
1576 (prev_UART_state_bitmap & B_TX_CARRIER))
1577 icount->dsr++;
1578 if ((UART_state_bitmap & B_RX_CARRIER) !=
1579 (prev_UART_state_bitmap & B_RX_CARRIER))
1580 icount->dcd++;
1581 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1582 spin_unlock(&serial->serial_lock);
1583 tiocmget->intr_completed = 1;
1584 wake_up_interruptible(&tiocmget->waitq);
1585 }
1586 memset(serial_state_notification, 0,
1587 sizeof(struct hso_serial_state_notification));
1588 tiocmget_submit_urb(serial,
1589 tiocmget,
1590 serial->parent->usb);
1591 }
1592
1593 /*
1594 * next few functions largely stolen from drivers/serial/serial_core.c
1595 */
1596 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1597 * - mask passed in arg for lines of interest
1598 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1599 * Caller should use TIOCGICOUNT to see which one it was
1600 */
1601 static int
1602 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1603 {
1604 DECLARE_WAITQUEUE(wait, current);
1605 struct uart_icount cprev, cnow;
1606 struct hso_tiocmget *tiocmget;
1607 int ret;
1608
1609 tiocmget = serial->tiocmget;
1610 if (!tiocmget)
1611 return -ENOENT;
1612 /*
1613 * note the counters on entry
1614 */
1615 spin_lock_irq(&serial->serial_lock);
1616 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1617 spin_unlock_irq(&serial->serial_lock);
1618 add_wait_queue(&tiocmget->waitq, &wait);
1619 for (;;) {
1620 spin_lock_irq(&serial->serial_lock);
1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622 spin_unlock_irq(&serial->serial_lock);
1623 set_current_state(TASK_INTERRUPTIBLE);
1624 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1625 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1626 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1627 ret = 0;
1628 break;
1629 }
1630 schedule();
1631 /* see if a signal did it */
1632 if (signal_pending(current)) {
1633 ret = -ERESTARTSYS;
1634 break;
1635 }
1636 cprev = cnow;
1637 }
1638 current->state = TASK_RUNNING;
1639 remove_wait_queue(&tiocmget->waitq, &wait);
1640
1641 return ret;
1642 }
1643
1644 /*
1645 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1646 * Return: write counters to the user passed counter struct
1647 * NB: both 1->0 and 0->1 transitions are counted except for
1648 * RI where only 0->1 is counted.
1649 */
1650 static int hso_get_count(struct hso_serial *serial,
1651 struct serial_icounter_struct __user *icnt)
1652 {
1653 struct serial_icounter_struct icount;
1654 struct uart_icount cnow;
1655 struct hso_tiocmget *tiocmget = serial->tiocmget;
1656
1657 if (!tiocmget)
1658 return -ENOENT;
1659 spin_lock_irq(&serial->serial_lock);
1660 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1661 spin_unlock_irq(&serial->serial_lock);
1662
1663 icount.cts = cnow.cts;
1664 icount.dsr = cnow.dsr;
1665 icount.rng = cnow.rng;
1666 icount.dcd = cnow.dcd;
1667 icount.rx = cnow.rx;
1668 icount.tx = cnow.tx;
1669 icount.frame = cnow.frame;
1670 icount.overrun = cnow.overrun;
1671 icount.parity = cnow.parity;
1672 icount.brk = cnow.brk;
1673 icount.buf_overrun = cnow.buf_overrun;
1674
1675 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1676 }
1677
1678
1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1680 {
1681 int retval;
1682 struct hso_serial *serial = get_serial_by_tty(tty);
1683 struct hso_tiocmget *tiocmget;
1684 u16 UART_state_bitmap;
1685
1686 /* sanity check */
1687 if (!serial) {
1688 D1("no tty structures");
1689 return -EINVAL;
1690 }
1691 spin_lock_irq(&serial->serial_lock);
1692 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1693 ((serial->dtr_state) ? TIOCM_DTR : 0);
1694 tiocmget = serial->tiocmget;
1695 if (tiocmget) {
1696
1697 UART_state_bitmap = le16_to_cpu(
1698 tiocmget->prev_UART_state_bitmap);
1699 if (UART_state_bitmap & B_RING_SIGNAL)
1700 retval |= TIOCM_RNG;
1701 if (UART_state_bitmap & B_RX_CARRIER)
1702 retval |= TIOCM_CD;
1703 if (UART_state_bitmap & B_TX_CARRIER)
1704 retval |= TIOCM_DSR;
1705 }
1706 spin_unlock_irq(&serial->serial_lock);
1707 return retval;
1708 }
1709
1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1711 unsigned int set, unsigned int clear)
1712 {
1713 int val = 0;
1714 unsigned long flags;
1715 int if_num;
1716 struct hso_serial *serial = get_serial_by_tty(tty);
1717
1718 /* sanity check */
1719 if (!serial) {
1720 D1("no tty structures");
1721 return -EINVAL;
1722 }
1723
1724 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1725 return -EINVAL;
1726
1727 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1728
1729 spin_lock_irqsave(&serial->serial_lock, flags);
1730 if (set & TIOCM_RTS)
1731 serial->rts_state = 1;
1732 if (set & TIOCM_DTR)
1733 serial->dtr_state = 1;
1734
1735 if (clear & TIOCM_RTS)
1736 serial->rts_state = 0;
1737 if (clear & TIOCM_DTR)
1738 serial->dtr_state = 0;
1739
1740 if (serial->dtr_state)
1741 val |= 0x01;
1742 if (serial->rts_state)
1743 val |= 0x02;
1744
1745 spin_unlock_irqrestore(&serial->serial_lock, flags);
1746
1747 return usb_control_msg(serial->parent->usb,
1748 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1749 0x21, val, if_num, NULL, 0,
1750 USB_CTRL_SET_TIMEOUT);
1751 }
1752
1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1754 unsigned int cmd, unsigned long arg)
1755 {
1756 struct hso_serial *serial = get_serial_by_tty(tty);
1757 void __user *uarg = (void __user *)arg;
1758 int ret = 0;
1759 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1760
1761 if (!serial)
1762 return -ENODEV;
1763 switch (cmd) {
1764 case TIOCMIWAIT:
1765 ret = hso_wait_modem_status(serial, arg);
1766 break;
1767
1768 case TIOCGICOUNT:
1769 ret = hso_get_count(serial, uarg);
1770 break;
1771 default:
1772 ret = -ENOIOCTLCMD;
1773 break;
1774 }
1775 return ret;
1776 }
1777
1778
1779 /* starts a transmit */
1780 static void hso_kick_transmit(struct hso_serial *serial)
1781 {
1782 u8 *temp;
1783 unsigned long flags;
1784 int res;
1785
1786 spin_lock_irqsave(&serial->serial_lock, flags);
1787 if (!serial->tx_buffer_count)
1788 goto out;
1789
1790 if (serial->tx_urb_used)
1791 goto out;
1792
1793 /* Wakeup USB interface if necessary */
1794 if (hso_get_activity(serial->parent) == -EAGAIN)
1795 goto out;
1796
1797 /* Switch pointers around to avoid memcpy */
1798 temp = serial->tx_buffer;
1799 serial->tx_buffer = serial->tx_data;
1800 serial->tx_data = temp;
1801 serial->tx_data_count = serial->tx_buffer_count;
1802 serial->tx_buffer_count = 0;
1803
1804 /* If temp is set, it means we switched buffers */
1805 if (temp && serial->write_data) {
1806 res = serial->write_data(serial);
1807 if (res >= 0)
1808 serial->tx_urb_used = 1;
1809 }
1810 out:
1811 spin_unlock_irqrestore(&serial->serial_lock, flags);
1812 }
1813
1814 /* make a request (for reading and writing data to muxed serial port) */
1815 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1816 struct urb *ctrl_urb,
1817 struct usb_ctrlrequest *ctrl_req,
1818 u8 *ctrl_urb_data, u32 size)
1819 {
1820 int result;
1821 int pipe;
1822
1823 /* Sanity check */
1824 if (!serial || !ctrl_urb || !ctrl_req) {
1825 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1826 return -EINVAL;
1827 }
1828
1829 /* initialize */
1830 ctrl_req->wValue = 0;
1831 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1832 ctrl_req->wLength = cpu_to_le16(size);
1833
1834 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1835 /* Reading command */
1836 ctrl_req->bRequestType = USB_DIR_IN |
1837 USB_TYPE_OPTION_VENDOR |
1838 USB_RECIP_INTERFACE;
1839 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1840 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1841 } else {
1842 /* Writing command */
1843 ctrl_req->bRequestType = USB_DIR_OUT |
1844 USB_TYPE_OPTION_VENDOR |
1845 USB_RECIP_INTERFACE;
1846 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1847 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1848 }
1849 /* syslog */
1850 D2("%s command (%02x) len: %d, port: %d",
1851 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1852 ctrl_req->bRequestType, ctrl_req->wLength, port);
1853
1854 /* Load ctrl urb */
1855 ctrl_urb->transfer_flags = 0;
1856 usb_fill_control_urb(ctrl_urb,
1857 serial->parent->usb,
1858 pipe,
1859 (u8 *) ctrl_req,
1860 ctrl_urb_data, size, ctrl_callback, serial);
1861 /* Send it on merry way */
1862 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1863 if (result) {
1864 dev_err(&ctrl_urb->dev->dev,
1865 "%s failed submit ctrl_urb %d type %d\n", __func__,
1866 result, type);
1867 return result;
1868 }
1869
1870 /* done */
1871 return size;
1872 }
1873
1874 /* called by intr_callback when read occurs */
1875 static int hso_mux_serial_read(struct hso_serial *serial)
1876 {
1877 if (!serial)
1878 return -EINVAL;
1879
1880 /* clean data */
1881 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1882 /* make the request */
1883
1884 if (serial->num_rx_urbs != 1) {
1885 dev_err(&serial->parent->interface->dev,
1886 "ERROR: mux'd reads with multiple buffers "
1887 "not possible\n");
1888 return 0;
1889 }
1890 return mux_device_request(serial,
1891 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1892 serial->parent->port_spec & HSO_PORT_MASK,
1893 serial->rx_urb[0],
1894 &serial->ctrl_req_rx,
1895 serial->rx_data[0], serial->rx_data_length);
1896 }
1897
1898 /* used for muxed serial port callback (muxed serial read) */
1899 static void intr_callback(struct urb *urb)
1900 {
1901 struct hso_shared_int *shared_int = urb->context;
1902 struct hso_serial *serial;
1903 unsigned char *port_req;
1904 int status = urb->status;
1905 int i;
1906
1907 usb_mark_last_busy(urb->dev);
1908
1909 /* sanity check */
1910 if (!shared_int)
1911 return;
1912
1913 /* status check */
1914 if (status) {
1915 handle_usb_error(status, __func__, NULL);
1916 return;
1917 }
1918 D4("\n--- Got intr callback 0x%02X ---", status);
1919
1920 /* what request? */
1921 port_req = urb->transfer_buffer;
1922 D4(" port_req = 0x%.2X\n", *port_req);
1923 /* loop over all muxed ports to find the one sending this */
1924 for (i = 0; i < 8; i++) {
1925 /* max 8 channels on MUX */
1926 if (*port_req & (1 << i)) {
1927 serial = get_serial_by_shared_int_and_type(shared_int,
1928 (1 << i));
1929 if (serial != NULL) {
1930 D1("Pending read interrupt on port %d\n", i);
1931 spin_lock(&serial->serial_lock);
1932 if (serial->rx_state == RX_IDLE &&
1933 serial->open_count > 0) {
1934 /* Setup and send a ctrl req read on
1935 * port i */
1936 if (!serial->rx_urb_filled[0]) {
1937 serial->rx_state = RX_SENT;
1938 hso_mux_serial_read(serial);
1939 } else
1940 serial->rx_state = RX_PENDING;
1941 } else {
1942 D1("Already a read pending on "
1943 "port %d or port not open\n", i);
1944 }
1945 spin_unlock(&serial->serial_lock);
1946 }
1947 }
1948 }
1949 /* Resubmit interrupt urb */
1950 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1951 }
1952
1953 /* called for writing to muxed serial port */
1954 static int hso_mux_serial_write_data(struct hso_serial *serial)
1955 {
1956 if (NULL == serial)
1957 return -EINVAL;
1958
1959 return mux_device_request(serial,
1960 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1961 serial->parent->port_spec & HSO_PORT_MASK,
1962 serial->tx_urb,
1963 &serial->ctrl_req_tx,
1964 serial->tx_data, serial->tx_data_count);
1965 }
1966
1967 /* write callback for Diag and CS port */
1968 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1969 {
1970 struct hso_serial *serial = urb->context;
1971 int status = urb->status;
1972 struct tty_struct *tty;
1973
1974 /* sanity check */
1975 if (!serial) {
1976 D1("serial == NULL");
1977 return;
1978 }
1979
1980 spin_lock(&serial->serial_lock);
1981 serial->tx_urb_used = 0;
1982 tty = tty_kref_get(serial->tty);
1983 spin_unlock(&serial->serial_lock);
1984 if (status) {
1985 handle_usb_error(status, __func__, serial->parent);
1986 tty_kref_put(tty);
1987 return;
1988 }
1989 hso_put_activity(serial->parent);
1990 if (tty) {
1991 tty_wakeup(tty);
1992 tty_kref_put(tty);
1993 }
1994 hso_kick_transmit(serial);
1995
1996 D1(" ");
1997 return;
1998 }
1999
2000 /* called for writing diag or CS serial port */
2001 static int hso_std_serial_write_data(struct hso_serial *serial)
2002 {
2003 int count = serial->tx_data_count;
2004 int result;
2005
2006 usb_fill_bulk_urb(serial->tx_urb,
2007 serial->parent->usb,
2008 usb_sndbulkpipe(serial->parent->usb,
2009 serial->out_endp->
2010 bEndpointAddress & 0x7F),
2011 serial->tx_data, serial->tx_data_count,
2012 hso_std_serial_write_bulk_callback, serial);
2013
2014 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2015 if (result) {
2016 dev_warn(&serial->parent->usb->dev,
2017 "Failed to submit urb - res %d\n", result);
2018 return result;
2019 }
2020
2021 return count;
2022 }
2023
2024 /* callback after read or write on muxed serial port */
2025 static void ctrl_callback(struct urb *urb)
2026 {
2027 struct hso_serial *serial = urb->context;
2028 struct usb_ctrlrequest *req;
2029 int status = urb->status;
2030 struct tty_struct *tty;
2031
2032 /* sanity check */
2033 if (!serial)
2034 return;
2035
2036 spin_lock(&serial->serial_lock);
2037 serial->tx_urb_used = 0;
2038 tty = tty_kref_get(serial->tty);
2039 spin_unlock(&serial->serial_lock);
2040 if (status) {
2041 handle_usb_error(status, __func__, serial->parent);
2042 tty_kref_put(tty);
2043 return;
2044 }
2045
2046 /* what request? */
2047 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2048 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2049 D4("Actual length of urb = %d\n", urb->actual_length);
2050 DUMP1(urb->transfer_buffer, urb->actual_length);
2051
2052 if (req->bRequestType ==
2053 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2054 /* response to a read command */
2055 serial->rx_urb_filled[0] = 1;
2056 spin_lock(&serial->serial_lock);
2057 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2058 spin_unlock(&serial->serial_lock);
2059 } else {
2060 hso_put_activity(serial->parent);
2061 if (tty)
2062 tty_wakeup(tty);
2063 /* response to a write command */
2064 hso_kick_transmit(serial);
2065 }
2066 tty_kref_put(tty);
2067 }
2068
2069 /* handle RX data for serial port */
2070 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2071 {
2072 struct tty_struct *tty;
2073 int write_length_remaining = 0;
2074 int curr_write_len;
2075
2076 /* Sanity check */
2077 if (urb == NULL || serial == NULL) {
2078 D1("serial = NULL");
2079 return -2;
2080 }
2081
2082 /* All callers to put_rxbuf_data hold serial_lock */
2083 tty = tty_kref_get(serial->tty);
2084
2085 /* Push data to tty */
2086 if (tty) {
2087 write_length_remaining = urb->actual_length -
2088 serial->curr_rx_urb_offset;
2089 D1("data to push to tty");
2090 while (write_length_remaining) {
2091 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2092 tty_kref_put(tty);
2093 return -1;
2094 }
2095 curr_write_len = tty_insert_flip_string
2096 (tty, urb->transfer_buffer +
2097 serial->curr_rx_urb_offset,
2098 write_length_remaining);
2099 serial->curr_rx_urb_offset += curr_write_len;
2100 write_length_remaining -= curr_write_len;
2101 tty_flip_buffer_push(tty);
2102 }
2103 }
2104 if (write_length_remaining == 0) {
2105 serial->curr_rx_urb_offset = 0;
2106 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2107 }
2108 tty_kref_put(tty);
2109 return write_length_remaining;
2110 }
2111
2112
2113 /* Base driver functions */
2114
2115 static void hso_log_port(struct hso_device *hso_dev)
2116 {
2117 char *port_type;
2118 char port_dev[20];
2119
2120 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2121 case HSO_PORT_CONTROL:
2122 port_type = "Control";
2123 break;
2124 case HSO_PORT_APP:
2125 port_type = "Application";
2126 break;
2127 case HSO_PORT_GPS:
2128 port_type = "GPS";
2129 break;
2130 case HSO_PORT_GPS_CONTROL:
2131 port_type = "GPS control";
2132 break;
2133 case HSO_PORT_APP2:
2134 port_type = "Application2";
2135 break;
2136 case HSO_PORT_PCSC:
2137 port_type = "PCSC";
2138 break;
2139 case HSO_PORT_DIAG:
2140 port_type = "Diagnostic";
2141 break;
2142 case HSO_PORT_DIAG2:
2143 port_type = "Diagnostic2";
2144 break;
2145 case HSO_PORT_MODEM:
2146 port_type = "Modem";
2147 break;
2148 case HSO_PORT_NETWORK:
2149 port_type = "Network";
2150 break;
2151 default:
2152 port_type = "Unknown";
2153 break;
2154 }
2155 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2156 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2157 } else
2158 sprintf(port_dev, "/dev/%s%d", tty_filename,
2159 dev2ser(hso_dev)->minor);
2160
2161 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2162 port_type, port_dev);
2163 }
2164
2165 static int hso_start_net_device(struct hso_device *hso_dev)
2166 {
2167 int i, result = 0;
2168 struct hso_net *hso_net = dev2net(hso_dev);
2169
2170 if (!hso_net)
2171 return -ENODEV;
2172
2173 /* send URBs for all read buffers */
2174 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2175
2176 /* Prep a receive URB */
2177 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2178 hso_dev->usb,
2179 usb_rcvbulkpipe(hso_dev->usb,
2180 hso_net->in_endp->
2181 bEndpointAddress & 0x7F),
2182 hso_net->mux_bulk_rx_buf_pool[i],
2183 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2184 hso_net);
2185
2186 /* Put it out there so the device can send us stuff */
2187 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2188 GFP_NOIO);
2189 if (result)
2190 dev_warn(&hso_dev->usb->dev,
2191 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2192 i, result);
2193 }
2194
2195 return result;
2196 }
2197
2198 static int hso_stop_net_device(struct hso_device *hso_dev)
2199 {
2200 int i;
2201 struct hso_net *hso_net = dev2net(hso_dev);
2202
2203 if (!hso_net)
2204 return -ENODEV;
2205
2206 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2207 if (hso_net->mux_bulk_rx_urb_pool[i])
2208 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2209
2210 }
2211 if (hso_net->mux_bulk_tx_urb)
2212 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2213
2214 return 0;
2215 }
2216
2217 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2218 {
2219 int i, result = 0;
2220 struct hso_serial *serial = dev2ser(hso_dev);
2221
2222 if (!serial)
2223 return -ENODEV;
2224
2225 /* If it is not the MUX port fill in and submit a bulk urb (already
2226 * allocated in hso_serial_start) */
2227 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2228 for (i = 0; i < serial->num_rx_urbs; i++) {
2229 usb_fill_bulk_urb(serial->rx_urb[i],
2230 serial->parent->usb,
2231 usb_rcvbulkpipe(serial->parent->usb,
2232 serial->in_endp->
2233 bEndpointAddress &
2234 0x7F),
2235 serial->rx_data[i],
2236 serial->rx_data_length,
2237 hso_std_serial_read_bulk_callback,
2238 serial);
2239 result = usb_submit_urb(serial->rx_urb[i], flags);
2240 if (result) {
2241 dev_warn(&serial->parent->usb->dev,
2242 "Failed to submit urb - res %d\n",
2243 result);
2244 break;
2245 }
2246 }
2247 } else {
2248 mutex_lock(&serial->shared_int->shared_int_lock);
2249 if (!serial->shared_int->use_count) {
2250 result =
2251 hso_mux_submit_intr_urb(serial->shared_int,
2252 hso_dev->usb, flags);
2253 }
2254 serial->shared_int->use_count++;
2255 mutex_unlock(&serial->shared_int->shared_int_lock);
2256 }
2257 if (serial->tiocmget)
2258 tiocmget_submit_urb(serial,
2259 serial->tiocmget,
2260 serial->parent->usb);
2261 return result;
2262 }
2263
2264 static int hso_stop_serial_device(struct hso_device *hso_dev)
2265 {
2266 int i;
2267 struct hso_serial *serial = dev2ser(hso_dev);
2268 struct hso_tiocmget *tiocmget;
2269
2270 if (!serial)
2271 return -ENODEV;
2272
2273 for (i = 0; i < serial->num_rx_urbs; i++) {
2274 if (serial->rx_urb[i]) {
2275 usb_kill_urb(serial->rx_urb[i]);
2276 serial->rx_urb_filled[i] = 0;
2277 }
2278 }
2279 serial->curr_rx_urb_idx = 0;
2280 serial->curr_rx_urb_offset = 0;
2281
2282 if (serial->tx_urb)
2283 usb_kill_urb(serial->tx_urb);
2284
2285 if (serial->shared_int) {
2286 mutex_lock(&serial->shared_int->shared_int_lock);
2287 if (serial->shared_int->use_count &&
2288 (--serial->shared_int->use_count == 0)) {
2289 struct urb *urb;
2290
2291 urb = serial->shared_int->shared_intr_urb;
2292 if (urb)
2293 usb_kill_urb(urb);
2294 }
2295 mutex_unlock(&serial->shared_int->shared_int_lock);
2296 }
2297 tiocmget = serial->tiocmget;
2298 if (tiocmget) {
2299 wake_up_interruptible(&tiocmget->waitq);
2300 usb_kill_urb(tiocmget->urb);
2301 }
2302
2303 return 0;
2304 }
2305
2306 static void hso_serial_common_free(struct hso_serial *serial)
2307 {
2308 int i;
2309
2310 if (serial->parent->dev)
2311 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2312
2313 tty_unregister_device(tty_drv, serial->minor);
2314
2315 for (i = 0; i < serial->num_rx_urbs; i++) {
2316 /* unlink and free RX URB */
2317 usb_free_urb(serial->rx_urb[i]);
2318 /* free the RX buffer */
2319 kfree(serial->rx_data[i]);
2320 }
2321
2322 /* unlink and free TX URB */
2323 usb_free_urb(serial->tx_urb);
2324 kfree(serial->tx_data);
2325 }
2326
2327 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2328 int rx_size, int tx_size)
2329 {
2330 struct device *dev;
2331 int minor;
2332 int i;
2333
2334 minor = get_free_serial_index();
2335 if (minor < 0)
2336 goto exit;
2337
2338 /* register our minor number */
2339 serial->parent->dev = tty_register_device(tty_drv, minor,
2340 &serial->parent->interface->dev);
2341 dev = serial->parent->dev;
2342 dev_set_drvdata(dev, serial->parent);
2343 i = device_create_file(dev, &dev_attr_hsotype);
2344
2345 /* fill in specific data for later use */
2346 serial->minor = minor;
2347 serial->magic = HSO_SERIAL_MAGIC;
2348 spin_lock_init(&serial->serial_lock);
2349 serial->num_rx_urbs = num_urbs;
2350
2351 /* RX, allocate urb and initialize */
2352
2353 /* prepare our RX buffer */
2354 serial->rx_data_length = rx_size;
2355 for (i = 0; i < serial->num_rx_urbs; i++) {
2356 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2357 if (!serial->rx_urb[i]) {
2358 dev_err(dev, "Could not allocate urb?\n");
2359 goto exit;
2360 }
2361 serial->rx_urb[i]->transfer_buffer = NULL;
2362 serial->rx_urb[i]->transfer_buffer_length = 0;
2363 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2364 GFP_KERNEL);
2365 if (!serial->rx_data[i]) {
2366 dev_err(dev, "%s - Out of memory\n", __func__);
2367 goto exit;
2368 }
2369 }
2370
2371 /* TX, allocate urb and initialize */
2372 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2373 if (!serial->tx_urb) {
2374 dev_err(dev, "Could not allocate urb?\n");
2375 goto exit;
2376 }
2377 serial->tx_urb->transfer_buffer = NULL;
2378 serial->tx_urb->transfer_buffer_length = 0;
2379 /* prepare our TX buffer */
2380 serial->tx_data_count = 0;
2381 serial->tx_buffer_count = 0;
2382 serial->tx_data_length = tx_size;
2383 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2384 if (!serial->tx_data) {
2385 dev_err(dev, "%s - Out of memory\n", __func__);
2386 goto exit;
2387 }
2388 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2389 if (!serial->tx_buffer) {
2390 dev_err(dev, "%s - Out of memory\n", __func__);
2391 goto exit;
2392 }
2393
2394 return 0;
2395 exit:
2396 hso_serial_common_free(serial);
2397 return -1;
2398 }
2399
2400 /* Creates a general hso device */
2401 static struct hso_device *hso_create_device(struct usb_interface *intf,
2402 int port_spec)
2403 {
2404 struct hso_device *hso_dev;
2405
2406 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2407 if (!hso_dev)
2408 return NULL;
2409
2410 hso_dev->port_spec = port_spec;
2411 hso_dev->usb = interface_to_usbdev(intf);
2412 hso_dev->interface = intf;
2413 kref_init(&hso_dev->ref);
2414 mutex_init(&hso_dev->mutex);
2415
2416 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2417 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2418 INIT_WORK(&hso_dev->reset_device, reset_device);
2419
2420 return hso_dev;
2421 }
2422
2423 /* Removes a network device in the network device table */
2424 static int remove_net_device(struct hso_device *hso_dev)
2425 {
2426 int i;
2427
2428 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2429 if (network_table[i] == hso_dev) {
2430 network_table[i] = NULL;
2431 break;
2432 }
2433 }
2434 if (i == HSO_MAX_NET_DEVICES)
2435 return -1;
2436 return 0;
2437 }
2438
2439 /* Frees our network device */
2440 static void hso_free_net_device(struct hso_device *hso_dev)
2441 {
2442 int i;
2443 struct hso_net *hso_net = dev2net(hso_dev);
2444
2445 if (!hso_net)
2446 return;
2447
2448 remove_net_device(hso_net->parent);
2449
2450 if (hso_net->net) {
2451 unregister_netdev(hso_net->net);
2452 free_netdev(hso_net->net);
2453 }
2454
2455 /* start freeing */
2456 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2457 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2458 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2459 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2460 }
2461 usb_free_urb(hso_net->mux_bulk_tx_urb);
2462 kfree(hso_net->mux_bulk_tx_buf);
2463 hso_net->mux_bulk_tx_buf = NULL;
2464
2465 kfree(hso_dev);
2466 }
2467
2468 static const struct net_device_ops hso_netdev_ops = {
2469 .ndo_open = hso_net_open,
2470 .ndo_stop = hso_net_close,
2471 .ndo_start_xmit = hso_net_start_xmit,
2472 .ndo_tx_timeout = hso_net_tx_timeout,
2473 };
2474
2475 /* initialize the network interface */
2476 static void hso_net_init(struct net_device *net)
2477 {
2478 struct hso_net *hso_net = netdev_priv(net);
2479
2480 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2481
2482 /* fill in the other fields */
2483 net->netdev_ops = &hso_netdev_ops;
2484 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2485 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2486 net->type = ARPHRD_NONE;
2487 net->mtu = DEFAULT_MTU - 14;
2488 net->tx_queue_len = 10;
2489 SET_ETHTOOL_OPS(net, &ops);
2490
2491 /* and initialize the semaphore */
2492 spin_lock_init(&hso_net->net_lock);
2493 }
2494
2495 /* Adds a network device in the network device table */
2496 static int add_net_device(struct hso_device *hso_dev)
2497 {
2498 int i;
2499
2500 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2501 if (network_table[i] == NULL) {
2502 network_table[i] = hso_dev;
2503 break;
2504 }
2505 }
2506 if (i == HSO_MAX_NET_DEVICES)
2507 return -1;
2508 return 0;
2509 }
2510
2511 static int hso_rfkill_set_block(void *data, bool blocked)
2512 {
2513 struct hso_device *hso_dev = data;
2514 int enabled = !blocked;
2515 int rv;
2516
2517 mutex_lock(&hso_dev->mutex);
2518 if (hso_dev->usb_gone)
2519 rv = 0;
2520 else
2521 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2522 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2523 USB_CTRL_SET_TIMEOUT);
2524 mutex_unlock(&hso_dev->mutex);
2525 return rv;
2526 }
2527
2528 static const struct rfkill_ops hso_rfkill_ops = {
2529 .set_block = hso_rfkill_set_block,
2530 };
2531
2532 /* Creates and sets up everything for rfkill */
2533 static void hso_create_rfkill(struct hso_device *hso_dev,
2534 struct usb_interface *interface)
2535 {
2536 struct hso_net *hso_net = dev2net(hso_dev);
2537 struct device *dev = &hso_net->net->dev;
2538 char *rfkn;
2539
2540 rfkn = kzalloc(20, GFP_KERNEL);
2541 if (!rfkn)
2542 dev_err(dev, "%s - Out of memory\n", __func__);
2543
2544 snprintf(rfkn, 20, "hso-%d",
2545 interface->altsetting->desc.bInterfaceNumber);
2546
2547 hso_net->rfkill = rfkill_alloc(rfkn,
2548 &interface_to_usbdev(interface)->dev,
2549 RFKILL_TYPE_WWAN,
2550 &hso_rfkill_ops, hso_dev);
2551 if (!hso_net->rfkill) {
2552 dev_err(dev, "%s - Out of memory\n", __func__);
2553 kfree(rfkn);
2554 return;
2555 }
2556 if (rfkill_register(hso_net->rfkill) < 0) {
2557 rfkill_destroy(hso_net->rfkill);
2558 kfree(rfkn);
2559 hso_net->rfkill = NULL;
2560 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2561 return;
2562 }
2563 }
2564
2565 static struct device_type hso_type = {
2566 .name = "wwan",
2567 };
2568
2569 /* Creates our network device */
2570 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2571 int port_spec)
2572 {
2573 int result, i;
2574 struct net_device *net;
2575 struct hso_net *hso_net;
2576 struct hso_device *hso_dev;
2577
2578 hso_dev = hso_create_device(interface, port_spec);
2579 if (!hso_dev)
2580 return NULL;
2581
2582 /* allocate our network device, then we can put in our private data */
2583 /* call hso_net_init to do the basic initialization */
2584 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2585 if (!net) {
2586 dev_err(&interface->dev, "Unable to create ethernet device\n");
2587 goto exit;
2588 }
2589
2590 hso_net = netdev_priv(net);
2591
2592 hso_dev->port_data.dev_net = hso_net;
2593 hso_net->net = net;
2594 hso_net->parent = hso_dev;
2595
2596 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2597 USB_DIR_IN);
2598 if (!hso_net->in_endp) {
2599 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2600 goto exit;
2601 }
2602 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2603 USB_DIR_OUT);
2604 if (!hso_net->out_endp) {
2605 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2606 goto exit;
2607 }
2608 SET_NETDEV_DEV(net, &interface->dev);
2609 SET_NETDEV_DEVTYPE(net, &hso_type);
2610
2611 /* registering our net device */
2612 result = register_netdev(net);
2613 if (result) {
2614 dev_err(&interface->dev, "Failed to register device\n");
2615 goto exit;
2616 }
2617
2618 /* start allocating */
2619 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2620 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2621 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2622 dev_err(&interface->dev, "Could not allocate rx urb\n");
2623 goto exit;
2624 }
2625 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2626 GFP_KERNEL);
2627 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2628 dev_err(&interface->dev, "Could not allocate rx buf\n");
2629 goto exit;
2630 }
2631 }
2632 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2633 if (!hso_net->mux_bulk_tx_urb) {
2634 dev_err(&interface->dev, "Could not allocate tx urb\n");
2635 goto exit;
2636 }
2637 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2638 if (!hso_net->mux_bulk_tx_buf) {
2639 dev_err(&interface->dev, "Could not allocate tx buf\n");
2640 goto exit;
2641 }
2642
2643 add_net_device(hso_dev);
2644
2645 hso_log_port(hso_dev);
2646
2647 hso_create_rfkill(hso_dev, interface);
2648
2649 return hso_dev;
2650 exit:
2651 hso_free_net_device(hso_dev);
2652 return NULL;
2653 }
2654
2655 static void hso_free_tiomget(struct hso_serial *serial)
2656 {
2657 struct hso_tiocmget *tiocmget = serial->tiocmget;
2658 if (tiocmget) {
2659 if (tiocmget->urb) {
2660 usb_free_urb(tiocmget->urb);
2661 tiocmget->urb = NULL;
2662 }
2663 serial->tiocmget = NULL;
2664 kfree(tiocmget);
2665
2666 }
2667 }
2668
2669 /* Frees an AT channel ( goes for both mux and non-mux ) */
2670 static void hso_free_serial_device(struct hso_device *hso_dev)
2671 {
2672 struct hso_serial *serial = dev2ser(hso_dev);
2673
2674 if (!serial)
2675 return;
2676 set_serial_by_index(serial->minor, NULL);
2677
2678 hso_serial_common_free(serial);
2679
2680 if (serial->shared_int) {
2681 mutex_lock(&serial->shared_int->shared_int_lock);
2682 if (--serial->shared_int->ref_count == 0)
2683 hso_free_shared_int(serial->shared_int);
2684 else
2685 mutex_unlock(&serial->shared_int->shared_int_lock);
2686 }
2687 hso_free_tiomget(serial);
2688 kfree(serial);
2689 kfree(hso_dev);
2690 }
2691
2692 /* Creates a bulk AT channel */
2693 static struct hso_device *hso_create_bulk_serial_device(
2694 struct usb_interface *interface, int port)
2695 {
2696 struct hso_device *hso_dev;
2697 struct hso_serial *serial;
2698 int num_urbs;
2699 struct hso_tiocmget *tiocmget;
2700
2701 hso_dev = hso_create_device(interface, port);
2702 if (!hso_dev)
2703 return NULL;
2704
2705 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2706 if (!serial)
2707 goto exit;
2708
2709 serial->parent = hso_dev;
2710 hso_dev->port_data.dev_serial = serial;
2711
2712 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2713 num_urbs = 2;
2714 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2715 GFP_KERNEL);
2716 /* it isn't going to break our heart if serial->tiocmget
2717 * allocation fails don't bother checking this.
2718 */
2719 if (serial->tiocmget) {
2720 tiocmget = serial->tiocmget;
2721 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2722 if (tiocmget->urb) {
2723 mutex_init(&tiocmget->mutex);
2724 init_waitqueue_head(&tiocmget->waitq);
2725 tiocmget->endp = hso_get_ep(
2726 interface,
2727 USB_ENDPOINT_XFER_INT,
2728 USB_DIR_IN);
2729 } else
2730 hso_free_tiomget(serial);
2731 }
2732 }
2733 else
2734 num_urbs = 1;
2735
2736 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2737 BULK_URB_TX_SIZE))
2738 goto exit;
2739
2740 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2741 USB_DIR_IN);
2742 if (!serial->in_endp) {
2743 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2744 goto exit2;
2745 }
2746
2747 if (!
2748 (serial->out_endp =
2749 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2750 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2751 goto exit2;
2752 }
2753
2754 serial->write_data = hso_std_serial_write_data;
2755
2756 /* and record this serial */
2757 set_serial_by_index(serial->minor, serial);
2758
2759 /* setup the proc dirs and files if needed */
2760 hso_log_port(hso_dev);
2761
2762 /* done, return it */
2763 return hso_dev;
2764
2765 exit2:
2766 hso_serial_common_free(serial);
2767 exit:
2768 hso_free_tiomget(serial);
2769 kfree(serial);
2770 kfree(hso_dev);
2771 return NULL;
2772 }
2773
2774 /* Creates a multiplexed AT channel */
2775 static
2776 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2777 int port,
2778 struct hso_shared_int *mux)
2779 {
2780 struct hso_device *hso_dev;
2781 struct hso_serial *serial;
2782 int port_spec;
2783
2784 port_spec = HSO_INTF_MUX;
2785 port_spec &= ~HSO_PORT_MASK;
2786
2787 port_spec |= hso_mux_to_port(port);
2788 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2789 return NULL;
2790
2791 hso_dev = hso_create_device(interface, port_spec);
2792 if (!hso_dev)
2793 return NULL;
2794
2795 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2796 if (!serial)
2797 goto exit;
2798
2799 hso_dev->port_data.dev_serial = serial;
2800 serial->parent = hso_dev;
2801
2802 if (hso_serial_common_create
2803 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2804 goto exit;
2805
2806 serial->tx_data_length--;
2807 serial->write_data = hso_mux_serial_write_data;
2808
2809 serial->shared_int = mux;
2810 mutex_lock(&serial->shared_int->shared_int_lock);
2811 serial->shared_int->ref_count++;
2812 mutex_unlock(&serial->shared_int->shared_int_lock);
2813
2814 /* and record this serial */
2815 set_serial_by_index(serial->minor, serial);
2816
2817 /* setup the proc dirs and files if needed */
2818 hso_log_port(hso_dev);
2819
2820 /* done, return it */
2821 return hso_dev;
2822
2823 exit:
2824 if (serial) {
2825 tty_unregister_device(tty_drv, serial->minor);
2826 kfree(serial);
2827 }
2828 if (hso_dev)
2829 kfree(hso_dev);
2830 return NULL;
2831
2832 }
2833
2834 static void hso_free_shared_int(struct hso_shared_int *mux)
2835 {
2836 usb_free_urb(mux->shared_intr_urb);
2837 kfree(mux->shared_intr_buf);
2838 mutex_unlock(&mux->shared_int_lock);
2839 kfree(mux);
2840 }
2841
2842 static
2843 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2844 {
2845 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2846
2847 if (!mux)
2848 return NULL;
2849
2850 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2851 USB_DIR_IN);
2852 if (!mux->intr_endp) {
2853 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2854 goto exit;
2855 }
2856
2857 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2858 if (!mux->shared_intr_urb) {
2859 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2860 goto exit;
2861 }
2862 mux->shared_intr_buf =
2863 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2864 GFP_KERNEL);
2865 if (!mux->shared_intr_buf) {
2866 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2867 goto exit;
2868 }
2869
2870 mutex_init(&mux->shared_int_lock);
2871
2872 return mux;
2873
2874 exit:
2875 kfree(mux->shared_intr_buf);
2876 usb_free_urb(mux->shared_intr_urb);
2877 kfree(mux);
2878 return NULL;
2879 }
2880
2881 /* Gets the port spec for a certain interface */
2882 static int hso_get_config_data(struct usb_interface *interface)
2883 {
2884 struct usb_device *usbdev = interface_to_usbdev(interface);
2885 u8 config_data[17];
2886 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2887 s32 result;
2888
2889 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2890 0x86, 0xC0, 0, 0, config_data, 17,
2891 USB_CTRL_SET_TIMEOUT) != 0x11) {
2892 return -EIO;
2893 }
2894
2895 switch (config_data[if_num]) {
2896 case 0x0:
2897 result = 0;
2898 break;
2899 case 0x1:
2900 result = HSO_PORT_DIAG;
2901 break;
2902 case 0x2:
2903 result = HSO_PORT_GPS;
2904 break;
2905 case 0x3:
2906 result = HSO_PORT_GPS_CONTROL;
2907 break;
2908 case 0x4:
2909 result = HSO_PORT_APP;
2910 break;
2911 case 0x5:
2912 result = HSO_PORT_APP2;
2913 break;
2914 case 0x6:
2915 result = HSO_PORT_CONTROL;
2916 break;
2917 case 0x7:
2918 result = HSO_PORT_NETWORK;
2919 break;
2920 case 0x8:
2921 result = HSO_PORT_MODEM;
2922 break;
2923 case 0x9:
2924 result = HSO_PORT_MSD;
2925 break;
2926 case 0xa:
2927 result = HSO_PORT_PCSC;
2928 break;
2929 case 0xb:
2930 result = HSO_PORT_VOICE;
2931 break;
2932 default:
2933 result = 0;
2934 }
2935
2936 if (result)
2937 result |= HSO_INTF_BULK;
2938
2939 if (config_data[16] & 0x1)
2940 result |= HSO_INFO_CRC_BUG;
2941
2942 return result;
2943 }
2944
2945 /* called once for each interface upon device insertion */
2946 static int hso_probe(struct usb_interface *interface,
2947 const struct usb_device_id *id)
2948 {
2949 int mux, i, if_num, port_spec;
2950 unsigned char port_mask;
2951 struct hso_device *hso_dev = NULL;
2952 struct hso_shared_int *shared_int;
2953 struct hso_device *tmp_dev = NULL;
2954
2955 if_num = interface->altsetting->desc.bInterfaceNumber;
2956
2957 /* Get the interface/port specification from either driver_info or from
2958 * the device itself */
2959 if (id->driver_info)
2960 port_spec = ((u32 *)(id->driver_info))[if_num];
2961 else
2962 port_spec = hso_get_config_data(interface);
2963
2964 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2965 dev_err(&interface->dev, "Not our interface\n");
2966 return -ENODEV;
2967 }
2968 /* Check if we need to switch to alt interfaces prior to port
2969 * configuration */
2970 if (interface->num_altsetting > 1)
2971 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2972 interface->needs_remote_wakeup = 1;
2973
2974 /* Allocate new hso device(s) */
2975 switch (port_spec & HSO_INTF_MASK) {
2976 case HSO_INTF_MUX:
2977 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2978 /* Create the network device */
2979 if (!disable_net) {
2980 hso_dev = hso_create_net_device(interface,
2981 port_spec);
2982 if (!hso_dev)
2983 goto exit;
2984 tmp_dev = hso_dev;
2985 }
2986 }
2987
2988 if (hso_get_mux_ports(interface, &port_mask))
2989 /* TODO: de-allocate everything */
2990 goto exit;
2991
2992 shared_int = hso_create_shared_int(interface);
2993 if (!shared_int)
2994 goto exit;
2995
2996 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2997 if (port_mask & i) {
2998 hso_dev = hso_create_mux_serial_device(
2999 interface, i, shared_int);
3000 if (!hso_dev)
3001 goto exit;
3002 }
3003 }
3004
3005 if (tmp_dev)
3006 hso_dev = tmp_dev;
3007 break;
3008
3009 case HSO_INTF_BULK:
3010 /* It's a regular bulk interface */
3011 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3012 !disable_net)
3013 hso_dev = hso_create_net_device(interface, port_spec);
3014 else
3015 hso_dev =
3016 hso_create_bulk_serial_device(interface, port_spec);
3017 if (!hso_dev)
3018 goto exit;
3019 break;
3020 default:
3021 goto exit;
3022 }
3023
3024 /* save our data pointer in this device */
3025 usb_set_intfdata(interface, hso_dev);
3026
3027 /* done */
3028 return 0;
3029 exit:
3030 hso_free_interface(interface);
3031 return -ENODEV;
3032 }
3033
3034 /* device removed, cleaning up */
3035 static void hso_disconnect(struct usb_interface *interface)
3036 {
3037 hso_free_interface(interface);
3038
3039 /* remove reference of our private data */
3040 usb_set_intfdata(interface, NULL);
3041 }
3042
3043 static void async_get_intf(struct work_struct *data)
3044 {
3045 struct hso_device *hso_dev =
3046 container_of(data, struct hso_device, async_get_intf);
3047 usb_autopm_get_interface(hso_dev->interface);
3048 }
3049
3050 static void async_put_intf(struct work_struct *data)
3051 {
3052 struct hso_device *hso_dev =
3053 container_of(data, struct hso_device, async_put_intf);
3054 usb_autopm_put_interface(hso_dev->interface);
3055 }
3056
3057 static int hso_get_activity(struct hso_device *hso_dev)
3058 {
3059 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3060 if (!hso_dev->is_active) {
3061 hso_dev->is_active = 1;
3062 schedule_work(&hso_dev->async_get_intf);
3063 }
3064 }
3065
3066 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3067 return -EAGAIN;
3068
3069 usb_mark_last_busy(hso_dev->usb);
3070
3071 return 0;
3072 }
3073
3074 static int hso_put_activity(struct hso_device *hso_dev)
3075 {
3076 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3077 if (hso_dev->is_active) {
3078 hso_dev->is_active = 0;
3079 schedule_work(&hso_dev->async_put_intf);
3080 return -EAGAIN;
3081 }
3082 }
3083 hso_dev->is_active = 0;
3084 return 0;
3085 }
3086
3087 /* called by kernel when we need to suspend device */
3088 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3089 {
3090 int i, result;
3091
3092 /* Stop all serial ports */
3093 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3094 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3095 result = hso_stop_serial_device(serial_table[i]);
3096 if (result)
3097 goto out;
3098 }
3099 }
3100
3101 /* Stop all network ports */
3102 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3103 if (network_table[i] &&
3104 (network_table[i]->interface == iface)) {
3105 result = hso_stop_net_device(network_table[i]);
3106 if (result)
3107 goto out;
3108 }
3109 }
3110
3111 out:
3112 return 0;
3113 }
3114
3115 /* called by kernel when we need to resume device */
3116 static int hso_resume(struct usb_interface *iface)
3117 {
3118 int i, result = 0;
3119 struct hso_net *hso_net;
3120
3121 /* Start all serial ports */
3122 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3123 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3124 if (dev2ser(serial_table[i])->open_count) {
3125 result =
3126 hso_start_serial_device(serial_table[i], GFP_NOIO);
3127 hso_kick_transmit(dev2ser(serial_table[i]));
3128 if (result)
3129 goto out;
3130 }
3131 }
3132 }
3133
3134 /* Start all network ports */
3135 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3136 if (network_table[i] &&
3137 (network_table[i]->interface == iface)) {
3138 hso_net = dev2net(network_table[i]);
3139 if (hso_net->flags & IFF_UP) {
3140 /* First transmit any lingering data,
3141 then restart the device. */
3142 if (hso_net->skb_tx_buf) {
3143 dev_dbg(&iface->dev,
3144 "Transmitting"
3145 " lingering data\n");
3146 hso_net_start_xmit(hso_net->skb_tx_buf,
3147 hso_net->net);
3148 hso_net->skb_tx_buf = NULL;
3149 }
3150 result = hso_start_net_device(network_table[i]);
3151 if (result)
3152 goto out;
3153 }
3154 }
3155 }
3156
3157 out:
3158 return result;
3159 }
3160
3161 static void reset_device(struct work_struct *data)
3162 {
3163 struct hso_device *hso_dev =
3164 container_of(data, struct hso_device, reset_device);
3165 struct usb_device *usb = hso_dev->usb;
3166 int result;
3167
3168 if (hso_dev->usb_gone) {
3169 D1("No reset during disconnect\n");
3170 } else {
3171 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3172 if (result < 0)
3173 D1("unable to lock device for reset: %d\n", result);
3174 else {
3175 usb_reset_device(usb);
3176 usb_unlock_device(usb);
3177 }
3178 }
3179 }
3180
3181 static void hso_serial_ref_free(struct kref *ref)
3182 {
3183 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3184
3185 hso_free_serial_device(hso_dev);
3186 }
3187
3188 static void hso_free_interface(struct usb_interface *interface)
3189 {
3190 struct hso_serial *hso_dev;
3191 struct tty_struct *tty;
3192 int i;
3193
3194 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3195 if (serial_table[i] &&
3196 (serial_table[i]->interface == interface)) {
3197 hso_dev = dev2ser(serial_table[i]);
3198 spin_lock_irq(&hso_dev->serial_lock);
3199 tty = tty_kref_get(hso_dev->tty);
3200 spin_unlock_irq(&hso_dev->serial_lock);
3201 if (tty)
3202 tty_hangup(tty);
3203 mutex_lock(&hso_dev->parent->mutex);
3204 tty_kref_put(tty);
3205 hso_dev->parent->usb_gone = 1;
3206 mutex_unlock(&hso_dev->parent->mutex);
3207 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3208 }
3209 }
3210
3211 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3212 if (network_table[i] &&
3213 (network_table[i]->interface == interface)) {
3214 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3215 /* hso_stop_net_device doesn't stop the net queue since
3216 * traffic needs to start it again when suspended */
3217 netif_stop_queue(dev2net(network_table[i])->net);
3218 hso_stop_net_device(network_table[i]);
3219 cancel_work_sync(&network_table[i]->async_put_intf);
3220 cancel_work_sync(&network_table[i]->async_get_intf);
3221 if (rfk) {
3222 rfkill_unregister(rfk);
3223 rfkill_destroy(rfk);
3224 }
3225 hso_free_net_device(network_table[i]);
3226 }
3227 }
3228 }
3229
3230 /* Helper functions */
3231
3232 /* Get the endpoint ! */
3233 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3234 int type, int dir)
3235 {
3236 int i;
3237 struct usb_host_interface *iface = intf->cur_altsetting;
3238 struct usb_endpoint_descriptor *endp;
3239
3240 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3241 endp = &iface->endpoint[i].desc;
3242 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3243 (usb_endpoint_type(endp) == type))
3244 return endp;
3245 }
3246
3247 return NULL;
3248 }
3249
3250 /* Get the byte that describes which ports are enabled */
3251 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3252 {
3253 int i;
3254 struct usb_host_interface *iface = intf->cur_altsetting;
3255
3256 if (iface->extralen == 3) {
3257 *ports = iface->extra[2];
3258 return 0;
3259 }
3260
3261 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3262 if (iface->endpoint[i].extralen == 3) {
3263 *ports = iface->endpoint[i].extra[2];
3264 return 0;
3265 }
3266 }
3267
3268 return -1;
3269 }
3270
3271 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3272 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3273 struct usb_device *usb, gfp_t gfp)
3274 {
3275 int result;
3276
3277 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3278 usb_rcvintpipe(usb,
3279 shared_int->intr_endp->bEndpointAddress & 0x7F),
3280 shared_int->shared_intr_buf,
3281 1,
3282 intr_callback, shared_int,
3283 shared_int->intr_endp->bInterval);
3284
3285 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3286 if (result)
3287 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3288 result);
3289
3290 return result;
3291 }
3292
3293 /* operations setup of the serial interface */
3294 static const struct tty_operations hso_serial_ops = {
3295 .open = hso_serial_open,
3296 .close = hso_serial_close,
3297 .write = hso_serial_write,
3298 .write_room = hso_serial_write_room,
3299 .ioctl = hso_serial_ioctl,
3300 .set_termios = hso_serial_set_termios,
3301 .chars_in_buffer = hso_serial_chars_in_buffer,
3302 .tiocmget = hso_serial_tiocmget,
3303 .tiocmset = hso_serial_tiocmset,
3304 .unthrottle = hso_unthrottle
3305 };
3306
3307 static struct usb_driver hso_driver = {
3308 .name = driver_name,
3309 .probe = hso_probe,
3310 .disconnect = hso_disconnect,
3311 .id_table = hso_ids,
3312 .suspend = hso_suspend,
3313 .resume = hso_resume,
3314 .reset_resume = hso_resume,
3315 .supports_autosuspend = 1,
3316 };
3317
3318 static int __init hso_init(void)
3319 {
3320 int i;
3321 int result;
3322
3323 /* put it in the log */
3324 printk(KERN_INFO "hso: %s\n", version);
3325
3326 /* Initialise the serial table semaphore and table */
3327 spin_lock_init(&serial_table_lock);
3328 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3329 serial_table[i] = NULL;
3330
3331 /* allocate our driver using the proper amount of supported minors */
3332 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3333 if (!tty_drv)
3334 return -ENOMEM;
3335
3336 /* fill in all needed values */
3337 tty_drv->magic = TTY_DRIVER_MAGIC;
3338 tty_drv->owner = THIS_MODULE;
3339 tty_drv->driver_name = driver_name;
3340 tty_drv->name = tty_filename;
3341
3342 /* if major number is provided as parameter, use that one */
3343 if (tty_major)
3344 tty_drv->major = tty_major;
3345
3346 tty_drv->minor_start = 0;
3347 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3348 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3349 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3350 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3351 tty_drv->init_termios = tty_std_termios;
3352 hso_init_termios(&tty_drv->init_termios);
3353 tty_set_operations(tty_drv, &hso_serial_ops);
3354
3355 /* register the tty driver */
3356 result = tty_register_driver(tty_drv);
3357 if (result) {
3358 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3359 __func__, result);
3360 return result;
3361 }
3362
3363 /* register this module as an usb driver */
3364 result = usb_register(&hso_driver);
3365 if (result) {
3366 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3367 result);
3368 /* cleanup serial interface */
3369 tty_unregister_driver(tty_drv);
3370 return result;
3371 }
3372
3373 /* done */
3374 return 0;
3375 }
3376
3377 static void __exit hso_exit(void)
3378 {
3379 printk(KERN_INFO "hso: unloaded\n");
3380
3381 tty_unregister_driver(tty_drv);
3382 /* deregister the usb driver */
3383 usb_deregister(&hso_driver);
3384 }
3385
3386 /* Module definitions */
3387 module_init(hso_init);
3388 module_exit(hso_exit);
3389
3390 MODULE_AUTHOR(MOD_AUTHOR);
3391 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3392 MODULE_LICENSE(MOD_LICENSE);
3393 MODULE_INFO(Version, DRIVER_VERSION);
3394
3395 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3396 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3397 module_param(debug, int, S_IRUGO | S_IWUSR);
3398
3399 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3400 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3401 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3402
3403 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3404 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3405 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux with added FPC-III support