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net: trans_start cleanups
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / usb / hso.c
bloba6227f892d1b9bd7d1926dc02991f13bce0a0375
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 }
838 dev_kfree_skb(skb);
839 /* we're done */
840 return NETDEV_TX_OK;
841 }
842
843 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
844 {
845 struct hso_net *odev = netdev_priv(net);
846
847 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
848 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
849 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
850 }
851
852 static const struct ethtool_ops ops = {
853 .get_drvinfo = hso_get_drvinfo,
854 .get_link = ethtool_op_get_link
855 };
856
857 /* called when a packet did not ack after watchdogtimeout */
858 static void hso_net_tx_timeout(struct net_device *net)
859 {
860 struct hso_net *odev = netdev_priv(net);
861
862 if (!odev)
863 return;
864
865 /* Tell syslog we are hosed. */
866 dev_warn(&net->dev, "Tx timed out.\n");
867
868 /* Tear the waiting frame off the list */
869 if (odev->mux_bulk_tx_urb &&
870 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
871 usb_unlink_urb(odev->mux_bulk_tx_urb);
872
873 /* Update statistics */
874 net->stats.tx_errors++;
875 }
876
877 /* make a real packet from the received USB buffer */
878 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
879 unsigned int count, unsigned char is_eop)
880 {
881 unsigned short temp_bytes;
882 unsigned short buffer_offset = 0;
883 unsigned short frame_len;
884 unsigned char *tmp_rx_buf;
885
886 /* log if needed */
887 D1("Rx %d bytes", count);
888 DUMP(ip_pkt, min(128, (int)count));
889
890 while (count) {
891 switch (odev->rx_parse_state) {
892 case WAIT_IP:
893 /* waiting for IP header. */
894 /* wanted bytes - size of ip header */
895 temp_bytes =
896 (count <
897 odev->rx_buf_missing) ? count : odev->
898 rx_buf_missing;
899
900 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
901 odev->rx_buf_size, ip_pkt + buffer_offset,
902 temp_bytes);
903
904 odev->rx_buf_size += temp_bytes;
905 buffer_offset += temp_bytes;
906 odev->rx_buf_missing -= temp_bytes;
907 count -= temp_bytes;
908
909 if (!odev->rx_buf_missing) {
910 /* header is complete allocate an sk_buffer and
911 * continue to WAIT_DATA */
912 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
913
914 if ((frame_len > DEFAULT_MRU) ||
915 (frame_len < sizeof(struct iphdr))) {
916 dev_err(&odev->net->dev,
917 "Invalid frame (%d) length\n",
918 frame_len);
919 odev->rx_parse_state = WAIT_SYNC;
920 continue;
921 }
922 /* Allocate an sk_buff */
923 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
924 frame_len);
925 if (!odev->skb_rx_buf) {
926 /* We got no receive buffer. */
927 D1("could not allocate memory");
928 odev->rx_parse_state = WAIT_SYNC;
929 return;
930 }
931
932 /* Copy what we got so far. make room for iphdr
933 * after tail. */
934 tmp_rx_buf =
935 skb_put(odev->skb_rx_buf,
936 sizeof(struct iphdr));
937 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
938 sizeof(struct iphdr));
939
940 /* ETH_HLEN */
941 odev->rx_buf_size = sizeof(struct iphdr);
942
943 /* Filip actually use .tot_len */
944 odev->rx_buf_missing =
945 frame_len - sizeof(struct iphdr);
946 odev->rx_parse_state = WAIT_DATA;
947 }
948 break;
949
950 case WAIT_DATA:
951 temp_bytes = (count < odev->rx_buf_missing)
952 ? count : odev->rx_buf_missing;
953
954 /* Copy the rest of the bytes that are left in the
955 * buffer into the waiting sk_buf. */
956 /* Make room for temp_bytes after tail. */
957 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
958 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
959
960 odev->rx_buf_missing -= temp_bytes;
961 count -= temp_bytes;
962 buffer_offset += temp_bytes;
963 odev->rx_buf_size += temp_bytes;
964 if (!odev->rx_buf_missing) {
965 /* Packet is complete. Inject into stack. */
966 /* We have IP packet here */
967 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
968 /* don't check it */
969 odev->skb_rx_buf->ip_summed =
970 CHECKSUM_UNNECESSARY;
971
972 skb_reset_mac_header(odev->skb_rx_buf);
973
974 /* Ship it off to the kernel */
975 netif_rx(odev->skb_rx_buf);
976 /* No longer our buffer. */
977 odev->skb_rx_buf = NULL;
978
979 /* update out statistics */
980 odev->net->stats.rx_packets++;
981
982 odev->net->stats.rx_bytes += odev->rx_buf_size;
983
984 odev->rx_buf_size = 0;
985 odev->rx_buf_missing = sizeof(struct iphdr);
986 odev->rx_parse_state = WAIT_IP;
987 }
988 break;
989
990 case WAIT_SYNC:
991 D1(" W_S");
992 count = 0;
993 break;
994 default:
995 D1(" ");
996 count--;
997 break;
998 }
999 }
1000
1001 /* Recovery mechanism for WAIT_SYNC state. */
1002 if (is_eop) {
1003 if (odev->rx_parse_state == WAIT_SYNC) {
1004 odev->rx_parse_state = WAIT_IP;
1005 odev->rx_buf_size = 0;
1006 odev->rx_buf_missing = sizeof(struct iphdr);
1007 }
1008 }
1009 }
1010
1011 /* Moving data from usb to kernel (in interrupt state) */
1012 static void read_bulk_callback(struct urb *urb)
1013 {
1014 struct hso_net *odev = urb->context;
1015 struct net_device *net;
1016 int result;
1017 int status = urb->status;
1018
1019 /* is al ok? (Filip: Who's Al ?) */
1020 if (status) {
1021 handle_usb_error(status, __func__, odev->parent);
1022 return;
1023 }
1024
1025 /* Sanity check */
1026 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1027 D1("BULK IN callback but driver is not active!");
1028 return;
1029 }
1030 usb_mark_last_busy(urb->dev);
1031
1032 net = odev->net;
1033
1034 if (!netif_device_present(net)) {
1035 /* Somebody killed our network interface... */
1036 return;
1037 }
1038
1039 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1040 u32 rest;
1041 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1042 rest = urb->actual_length %
1043 le16_to_cpu(odev->in_endp->wMaxPacketSize);
1044 if (((rest == 5) || (rest == 6)) &&
1045 !memcmp(((u8 *) urb->transfer_buffer) +
1046 urb->actual_length - 4, crc_check, 4)) {
1047 urb->actual_length -= 4;
1048 }
1049 }
1050
1051 /* do we even have a packet? */
1052 if (urb->actual_length) {
1053 /* Handle the IP stream, add header and push it onto network
1054 * stack if the packet is complete. */
1055 spin_lock(&odev->net_lock);
1056 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1057 (urb->transfer_buffer_length >
1058 urb->actual_length) ? 1 : 0);
1059 spin_unlock(&odev->net_lock);
1060 }
1061
1062 /* We are done with this URB, resubmit it. Prep the USB to wait for
1063 * another frame. Reuse same as received. */
1064 usb_fill_bulk_urb(urb,
1065 odev->parent->usb,
1066 usb_rcvbulkpipe(odev->parent->usb,
1067 odev->in_endp->
1068 bEndpointAddress & 0x7F),
1069 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1070 read_bulk_callback, odev);
1071
1072 /* Give this to the USB subsystem so it can tell us when more data
1073 * arrives. */
1074 result = usb_submit_urb(urb, GFP_ATOMIC);
1075 if (result)
1076 dev_warn(&odev->parent->interface->dev,
1077 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1078 result);
1079 }
1080
1081 /* Serial driver functions */
1082
1083 static void hso_init_termios(struct ktermios *termios)
1084 {
1085 /*
1086 * The default requirements for this device are:
1087 */
1088 termios->c_iflag &=
1089 ~(IGNBRK /* disable ignore break */
1090 | BRKINT /* disable break causes interrupt */
1091 | PARMRK /* disable mark parity errors */
1092 | ISTRIP /* disable clear high bit of input characters */
1093 | INLCR /* disable translate NL to CR */
1094 | IGNCR /* disable ignore CR */
1095 | ICRNL /* disable translate CR to NL */
1096 | IXON); /* disable enable XON/XOFF flow control */
1097
1098 /* disable postprocess output characters */
1099 termios->c_oflag &= ~OPOST;
1100
1101 termios->c_lflag &=
1102 ~(ECHO /* disable echo input characters */
1103 | ECHONL /* disable echo new line */
1104 | ICANON /* disable erase, kill, werase, and rprnt
1105 special characters */
1106 | ISIG /* disable interrupt, quit, and suspend special
1107 characters */
1108 | IEXTEN); /* disable non-POSIX special characters */
1109
1110 termios->c_cflag &=
1111 ~(CSIZE /* no size */
1112 | PARENB /* disable parity bit */
1113 | CBAUD /* clear current baud rate */
1114 | CBAUDEX); /* clear current buad rate */
1115
1116 termios->c_cflag |= CS8; /* character size 8 bits */
1117
1118 /* baud rate 115200 */
1119 tty_termios_encode_baud_rate(termios, 115200, 115200);
1120 }
1121
1122 static void _hso_serial_set_termios(struct tty_struct *tty,
1123 struct ktermios *old)
1124 {
1125 struct hso_serial *serial = get_serial_by_tty(tty);
1126 struct ktermios *termios;
1127
1128 if (!serial) {
1129 printk(KERN_ERR "%s: no tty structures", __func__);
1130 return;
1131 }
1132
1133 D4("port %d", serial->minor);
1134
1135 /*
1136 * Fix up unsupported bits
1137 */
1138 termios = tty->termios;
1139 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1140
1141 termios->c_cflag &=
1142 ~(CSIZE /* no size */
1143 | PARENB /* disable parity bit */
1144 | CBAUD /* clear current baud rate */
1145 | CBAUDEX); /* clear current buad rate */
1146
1147 termios->c_cflag |= CS8; /* character size 8 bits */
1148
1149 /* baud rate 115200 */
1150 tty_encode_baud_rate(tty, 115200, 115200);
1151 }
1152
1153 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1154 {
1155 int result;
1156 /* We are done with this URB, resubmit it. Prep the USB to wait for
1157 * another frame */
1158 usb_fill_bulk_urb(urb, serial->parent->usb,
1159 usb_rcvbulkpipe(serial->parent->usb,
1160 serial->in_endp->
1161 bEndpointAddress & 0x7F),
1162 urb->transfer_buffer, serial->rx_data_length,
1163 hso_std_serial_read_bulk_callback, serial);
1164 /* Give this to the USB subsystem so it can tell us when more data
1165 * arrives. */
1166 result = usb_submit_urb(urb, GFP_ATOMIC);
1167 if (result) {
1168 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1169 __func__, result);
1170 }
1171 }
1172
1173
1174
1175
1176 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1177 {
1178 int count;
1179 struct urb *curr_urb;
1180
1181 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1182 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1183 count = put_rxbuf_data(curr_urb, serial);
1184 if (count == -1)
1185 return;
1186 if (count == 0) {
1187 serial->curr_rx_urb_idx++;
1188 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1189 serial->curr_rx_urb_idx = 0;
1190 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1191 }
1192 }
1193 }
1194
1195 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1196 {
1197 int count = 0;
1198 struct urb *urb;
1199
1200 urb = serial->rx_urb[0];
1201 if (serial->open_count > 0) {
1202 count = put_rxbuf_data(urb, serial);
1203 if (count == -1)
1204 return;
1205 }
1206 /* Re issue a read as long as we receive data. */
1207
1208 if (count == 0 && ((urb->actual_length != 0) ||
1209 (serial->rx_state == RX_PENDING))) {
1210 serial->rx_state = RX_SENT;
1211 hso_mux_serial_read(serial);
1212 } else
1213 serial->rx_state = RX_IDLE;
1214 }
1215
1216
1217 /* read callback for Diag and CS port */
1218 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1219 {
1220 struct hso_serial *serial = urb->context;
1221 int status = urb->status;
1222
1223 /* sanity check */
1224 if (!serial) {
1225 D1("serial == NULL");
1226 return;
1227 } else if (status) {
1228 handle_usb_error(status, __func__, serial->parent);
1229 return;
1230 }
1231
1232 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1233 D1("Actual length = %d\n", urb->actual_length);
1234 DUMP1(urb->transfer_buffer, urb->actual_length);
1235
1236 /* Anyone listening? */
1237 if (serial->open_count == 0)
1238 return;
1239
1240 if (status == 0) {
1241 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1242 u32 rest;
1243 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1244 rest =
1245 urb->actual_length %
1246 le16_to_cpu(serial->in_endp->wMaxPacketSize);
1247 if (((rest == 5) || (rest == 6)) &&
1248 !memcmp(((u8 *) urb->transfer_buffer) +
1249 urb->actual_length - 4, crc_check, 4)) {
1250 urb->actual_length -= 4;
1251 }
1252 }
1253 /* Valid data, handle RX data */
1254 spin_lock(&serial->serial_lock);
1255 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1256 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1257 spin_unlock(&serial->serial_lock);
1258 } else if (status == -ENOENT || status == -ECONNRESET) {
1259 /* Unlinked - check for throttled port. */
1260 D2("Port %d, successfully unlinked urb", serial->minor);
1261 spin_lock(&serial->serial_lock);
1262 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1263 hso_resubmit_rx_bulk_urb(serial, urb);
1264 spin_unlock(&serial->serial_lock);
1265 } else {
1266 D2("Port %d, status = %d for read urb", serial->minor, status);
1267 return;
1268 }
1269 }
1270
1271 /*
1272 * This needs to be a tasklet otherwise we will
1273 * end up recursively calling this function.
1274 */
1275 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1276 {
1277 unsigned long flags;
1278
1279 spin_lock_irqsave(&serial->serial_lock, flags);
1280 if ((serial->parent->port_spec & HSO_INTF_MUX))
1281 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1282 else
1283 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1284 spin_unlock_irqrestore(&serial->serial_lock, flags);
1285 }
1286
1287 static void hso_unthrottle(struct tty_struct *tty)
1288 {
1289 struct hso_serial *serial = get_serial_by_tty(tty);
1290
1291 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1292 }
1293
1294 static void hso_unthrottle_workfunc(struct work_struct *work)
1295 {
1296 struct hso_serial *serial =
1297 container_of(work, struct hso_serial,
1298 retry_unthrottle_workqueue);
1299 hso_unthrottle_tasklet(serial);
1300 }
1301
1302 /* open the requested serial port */
1303 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1304 {
1305 struct hso_serial *serial = get_serial_by_index(tty->index);
1306 int result;
1307
1308 /* sanity check */
1309 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1310 WARN_ON(1);
1311 tty->driver_data = NULL;
1312 D1("Failed to open port");
1313 return -ENODEV;
1314 }
1315
1316 mutex_lock(&serial->parent->mutex);
1317 result = usb_autopm_get_interface(serial->parent->interface);
1318 if (result < 0)
1319 goto err_out;
1320
1321 D1("Opening %d", serial->minor);
1322 kref_get(&serial->parent->ref);
1323
1324 /* setup */
1325 spin_lock_irq(&serial->serial_lock);
1326 tty->driver_data = serial;
1327 tty_kref_put(serial->tty);
1328 serial->tty = tty_kref_get(tty);
1329 spin_unlock_irq(&serial->serial_lock);
1330
1331 /* check for port already opened, if not set the termios */
1332 serial->open_count++;
1333 if (serial->open_count == 1) {
1334 tty->low_latency = 1;
1335 serial->rx_state = RX_IDLE;
1336 /* Force default termio settings */
1337 _hso_serial_set_termios(tty, NULL);
1338 tasklet_init(&serial->unthrottle_tasklet,
1339 (void (*)(unsigned long))hso_unthrottle_tasklet,
1340 (unsigned long)serial);
1341 INIT_WORK(&serial->retry_unthrottle_workqueue,
1342 hso_unthrottle_workfunc);
1343 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1344 if (result) {
1345 hso_stop_serial_device(serial->parent);
1346 serial->open_count--;
1347 kref_put(&serial->parent->ref, hso_serial_ref_free);
1348 }
1349 } else {
1350 D1("Port was already open");
1351 }
1352
1353 usb_autopm_put_interface(serial->parent->interface);
1354
1355 /* done */
1356 if (result)
1357 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1358 err_out:
1359 mutex_unlock(&serial->parent->mutex);
1360 return result;
1361 }
1362
1363 /* close the requested serial port */
1364 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1365 {
1366 struct hso_serial *serial = tty->driver_data;
1367 u8 usb_gone;
1368
1369 D1("Closing serial port");
1370
1371 /* Open failed, no close cleanup required */
1372 if (serial == NULL)
1373 return;
1374
1375 mutex_lock(&serial->parent->mutex);
1376 usb_gone = serial->parent->usb_gone;
1377
1378 if (!usb_gone)
1379 usb_autopm_get_interface(serial->parent->interface);
1380
1381 /* reset the rts and dtr */
1382 /* do the actual close */
1383 serial->open_count--;
1384
1385 if (serial->open_count <= 0) {
1386 serial->open_count = 0;
1387 spin_lock_irq(&serial->serial_lock);
1388 if (serial->tty == tty) {
1389 serial->tty->driver_data = NULL;
1390 serial->tty = NULL;
1391 tty_kref_put(tty);
1392 }
1393 spin_unlock_irq(&serial->serial_lock);
1394 if (!usb_gone)
1395 hso_stop_serial_device(serial->parent);
1396 tasklet_kill(&serial->unthrottle_tasklet);
1397 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1398 }
1399
1400 if (!usb_gone)
1401 usb_autopm_put_interface(serial->parent->interface);
1402
1403 mutex_unlock(&serial->parent->mutex);
1404
1405 kref_put(&serial->parent->ref, hso_serial_ref_free);
1406 }
1407
1408 /* close the requested serial port */
1409 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1410 int count)
1411 {
1412 struct hso_serial *serial = get_serial_by_tty(tty);
1413 int space, tx_bytes;
1414 unsigned long flags;
1415
1416 /* sanity check */
1417 if (serial == NULL) {
1418 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1419 return -ENODEV;
1420 }
1421
1422 spin_lock_irqsave(&serial->serial_lock, flags);
1423
1424 space = serial->tx_data_length - serial->tx_buffer_count;
1425 tx_bytes = (count < space) ? count : space;
1426
1427 if (!tx_bytes)
1428 goto out;
1429
1430 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1431 serial->tx_buffer_count += tx_bytes;
1432
1433 out:
1434 spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436 hso_kick_transmit(serial);
1437 /* done */
1438 return tx_bytes;
1439 }
1440
1441 /* how much room is there for writing */
1442 static int hso_serial_write_room(struct tty_struct *tty)
1443 {
1444 struct hso_serial *serial = get_serial_by_tty(tty);
1445 int room;
1446 unsigned long flags;
1447
1448 spin_lock_irqsave(&serial->serial_lock, flags);
1449 room = serial->tx_data_length - serial->tx_buffer_count;
1450 spin_unlock_irqrestore(&serial->serial_lock, flags);
1451
1452 /* return free room */
1453 return room;
1454 }
1455
1456 /* setup the term */
1457 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1458 {
1459 struct hso_serial *serial = get_serial_by_tty(tty);
1460 unsigned long flags;
1461
1462 if (old)
1463 D5("Termios called with: cflags new[%d] - old[%d]",
1464 tty->termios->c_cflag, old->c_cflag);
1465
1466 /* the actual setup */
1467 spin_lock_irqsave(&serial->serial_lock, flags);
1468 if (serial->open_count)
1469 _hso_serial_set_termios(tty, old);
1470 else
1471 tty->termios = old;
1472 spin_unlock_irqrestore(&serial->serial_lock, flags);
1473
1474 /* done */
1475 return;
1476 }
1477
1478 /* how many characters in the buffer */
1479 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1480 {
1481 struct hso_serial *serial = get_serial_by_tty(tty);
1482 int chars;
1483 unsigned long flags;
1484
1485 /* sanity check */
1486 if (serial == NULL)
1487 return 0;
1488
1489 spin_lock_irqsave(&serial->serial_lock, flags);
1490 chars = serial->tx_buffer_count;
1491 spin_unlock_irqrestore(&serial->serial_lock, flags);
1492
1493 return chars;
1494 }
1495 static int tiocmget_submit_urb(struct hso_serial *serial,
1496 struct hso_tiocmget *tiocmget,
1497 struct usb_device *usb)
1498 {
1499 int result;
1500
1501 if (serial->parent->usb_gone)
1502 return -ENODEV;
1503 usb_fill_int_urb(tiocmget->urb, usb,
1504 usb_rcvintpipe(usb,
1505 tiocmget->endp->
1506 bEndpointAddress & 0x7F),
1507 &tiocmget->serial_state_notification,
1508 sizeof(struct hso_serial_state_notification),
1509 tiocmget_intr_callback, serial,
1510 tiocmget->endp->bInterval);
1511 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1512 if (result) {
1513 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1514 result);
1515 }
1516 return result;
1517
1518 }
1519
1520 static void tiocmget_intr_callback(struct urb *urb)
1521 {
1522 struct hso_serial *serial = urb->context;
1523 struct hso_tiocmget *tiocmget;
1524 int status = urb->status;
1525 u16 UART_state_bitmap, prev_UART_state_bitmap;
1526 struct uart_icount *icount;
1527 struct hso_serial_state_notification *serial_state_notification;
1528 struct usb_device *usb;
1529
1530 /* Sanity checks */
1531 if (!serial)
1532 return;
1533 if (status) {
1534 handle_usb_error(status, __func__, serial->parent);
1535 return;
1536 }
1537 tiocmget = serial->tiocmget;
1538 if (!tiocmget)
1539 return;
1540 usb = serial->parent->usb;
1541 serial_state_notification = &tiocmget->serial_state_notification;
1542 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1543 serial_state_notification->bNotification != B_NOTIFICATION ||
1544 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1545 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1546 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1547 dev_warn(&usb->dev,
1548 "hso received invalid serial state notification\n");
1549 DUMP(serial_state_notification,
1550 sizeof(struct hso_serial_state_notification));
1551 } else {
1552
1553 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1554 UART_state_bitmap);
1555 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1556 icount = &tiocmget->icount;
1557 spin_lock(&serial->serial_lock);
1558 if ((UART_state_bitmap & B_OVERRUN) !=
1559 (prev_UART_state_bitmap & B_OVERRUN))
1560 icount->parity++;
1561 if ((UART_state_bitmap & B_PARITY) !=
1562 (prev_UART_state_bitmap & B_PARITY))
1563 icount->parity++;
1564 if ((UART_state_bitmap & B_FRAMING) !=
1565 (prev_UART_state_bitmap & B_FRAMING))
1566 icount->frame++;
1567 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1568 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1569 icount->rng++;
1570 if ((UART_state_bitmap & B_BREAK) !=
1571 (prev_UART_state_bitmap & B_BREAK))
1572 icount->brk++;
1573 if ((UART_state_bitmap & B_TX_CARRIER) !=
1574 (prev_UART_state_bitmap & B_TX_CARRIER))
1575 icount->dsr++;
1576 if ((UART_state_bitmap & B_RX_CARRIER) !=
1577 (prev_UART_state_bitmap & B_RX_CARRIER))
1578 icount->dcd++;
1579 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1580 spin_unlock(&serial->serial_lock);
1581 tiocmget->intr_completed = 1;
1582 wake_up_interruptible(&tiocmget->waitq);
1583 }
1584 memset(serial_state_notification, 0,
1585 sizeof(struct hso_serial_state_notification));
1586 tiocmget_submit_urb(serial,
1587 tiocmget,
1588 serial->parent->usb);
1589 }
1590
1591 /*
1592 * next few functions largely stolen from drivers/serial/serial_core.c
1593 */
1594 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1595 * - mask passed in arg for lines of interest
1596 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1597 * Caller should use TIOCGICOUNT to see which one it was
1598 */
1599 static int
1600 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1601 {
1602 DECLARE_WAITQUEUE(wait, current);
1603 struct uart_icount cprev, cnow;
1604 struct hso_tiocmget *tiocmget;
1605 int ret;
1606
1607 tiocmget = serial->tiocmget;
1608 if (!tiocmget)
1609 return -ENOENT;
1610 /*
1611 * note the counters on entry
1612 */
1613 spin_lock_irq(&serial->serial_lock);
1614 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1615 spin_unlock_irq(&serial->serial_lock);
1616 add_wait_queue(&tiocmget->waitq, &wait);
1617 for (;;) {
1618 spin_lock_irq(&serial->serial_lock);
1619 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1620 spin_unlock_irq(&serial->serial_lock);
1621 set_current_state(TASK_INTERRUPTIBLE);
1622 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1623 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1624 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1625 ret = 0;
1626 break;
1627 }
1628 schedule();
1629 /* see if a signal did it */
1630 if (signal_pending(current)) {
1631 ret = -ERESTARTSYS;
1632 break;
1633 }
1634 cprev = cnow;
1635 }
1636 current->state = TASK_RUNNING;
1637 remove_wait_queue(&tiocmget->waitq, &wait);
1638
1639 return ret;
1640 }
1641
1642 /*
1643 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1644 * Return: write counters to the user passed counter struct
1645 * NB: both 1->0 and 0->1 transitions are counted except for
1646 * RI where only 0->1 is counted.
1647 */
1648 static int hso_get_count(struct hso_serial *serial,
1649 struct serial_icounter_struct __user *icnt)
1650 {
1651 struct serial_icounter_struct icount;
1652 struct uart_icount cnow;
1653 struct hso_tiocmget *tiocmget = serial->tiocmget;
1654
1655 if (!tiocmget)
1656 return -ENOENT;
1657 spin_lock_irq(&serial->serial_lock);
1658 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1659 spin_unlock_irq(&serial->serial_lock);
1660
1661 icount.cts = cnow.cts;
1662 icount.dsr = cnow.dsr;
1663 icount.rng = cnow.rng;
1664 icount.dcd = cnow.dcd;
1665 icount.rx = cnow.rx;
1666 icount.tx = cnow.tx;
1667 icount.frame = cnow.frame;
1668 icount.overrun = cnow.overrun;
1669 icount.parity = cnow.parity;
1670 icount.brk = cnow.brk;
1671 icount.buf_overrun = cnow.buf_overrun;
1672
1673 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1674 }
1675
1676
1677 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1678 {
1679 int retval;
1680 struct hso_serial *serial = get_serial_by_tty(tty);
1681 struct hso_tiocmget *tiocmget;
1682 u16 UART_state_bitmap;
1683
1684 /* sanity check */
1685 if (!serial) {
1686 D1("no tty structures");
1687 return -EINVAL;
1688 }
1689 spin_lock_irq(&serial->serial_lock);
1690 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1691 ((serial->dtr_state) ? TIOCM_DTR : 0);
1692 tiocmget = serial->tiocmget;
1693 if (tiocmget) {
1694
1695 UART_state_bitmap = le16_to_cpu(
1696 tiocmget->prev_UART_state_bitmap);
1697 if (UART_state_bitmap & B_RING_SIGNAL)
1698 retval |= TIOCM_RNG;
1699 if (UART_state_bitmap & B_RX_CARRIER)
1700 retval |= TIOCM_CD;
1701 if (UART_state_bitmap & B_TX_CARRIER)
1702 retval |= TIOCM_DSR;
1703 }
1704 spin_unlock_irq(&serial->serial_lock);
1705 return retval;
1706 }
1707
1708 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1709 unsigned int set, unsigned int clear)
1710 {
1711 int val = 0;
1712 unsigned long flags;
1713 int if_num;
1714 struct hso_serial *serial = get_serial_by_tty(tty);
1715
1716 /* sanity check */
1717 if (!serial) {
1718 D1("no tty structures");
1719 return -EINVAL;
1720 }
1721
1722 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1723 return -EINVAL;
1724
1725 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1726
1727 spin_lock_irqsave(&serial->serial_lock, flags);
1728 if (set & TIOCM_RTS)
1729 serial->rts_state = 1;
1730 if (set & TIOCM_DTR)
1731 serial->dtr_state = 1;
1732
1733 if (clear & TIOCM_RTS)
1734 serial->rts_state = 0;
1735 if (clear & TIOCM_DTR)
1736 serial->dtr_state = 0;
1737
1738 if (serial->dtr_state)
1739 val |= 0x01;
1740 if (serial->rts_state)
1741 val |= 0x02;
1742
1743 spin_unlock_irqrestore(&serial->serial_lock, flags);
1744
1745 return usb_control_msg(serial->parent->usb,
1746 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1747 0x21, val, if_num, NULL, 0,
1748 USB_CTRL_SET_TIMEOUT);
1749 }
1750
1751 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1752 unsigned int cmd, unsigned long arg)
1753 {
1754 struct hso_serial *serial = get_serial_by_tty(tty);
1755 void __user *uarg = (void __user *)arg;
1756 int ret = 0;
1757 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1758
1759 if (!serial)
1760 return -ENODEV;
1761 switch (cmd) {
1762 case TIOCMIWAIT:
1763 ret = hso_wait_modem_status(serial, arg);
1764 break;
1765
1766 case TIOCGICOUNT:
1767 ret = hso_get_count(serial, uarg);
1768 break;
1769 default:
1770 ret = -ENOIOCTLCMD;
1771 break;
1772 }
1773 return ret;
1774 }
1775
1776
1777 /* starts a transmit */
1778 static void hso_kick_transmit(struct hso_serial *serial)
1779 {
1780 u8 *temp;
1781 unsigned long flags;
1782 int res;
1783
1784 spin_lock_irqsave(&serial->serial_lock, flags);
1785 if (!serial->tx_buffer_count)
1786 goto out;
1787
1788 if (serial->tx_urb_used)
1789 goto out;
1790
1791 /* Wakeup USB interface if necessary */
1792 if (hso_get_activity(serial->parent) == -EAGAIN)
1793 goto out;
1794
1795 /* Switch pointers around to avoid memcpy */
1796 temp = serial->tx_buffer;
1797 serial->tx_buffer = serial->tx_data;
1798 serial->tx_data = temp;
1799 serial->tx_data_count = serial->tx_buffer_count;
1800 serial->tx_buffer_count = 0;
1801
1802 /* If temp is set, it means we switched buffers */
1803 if (temp && serial->write_data) {
1804 res = serial->write_data(serial);
1805 if (res >= 0)
1806 serial->tx_urb_used = 1;
1807 }
1808 out:
1809 spin_unlock_irqrestore(&serial->serial_lock, flags);
1810 }
1811
1812 /* make a request (for reading and writing data to muxed serial port) */
1813 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1814 struct urb *ctrl_urb,
1815 struct usb_ctrlrequest *ctrl_req,
1816 u8 *ctrl_urb_data, u32 size)
1817 {
1818 int result;
1819 int pipe;
1820
1821 /* Sanity check */
1822 if (!serial || !ctrl_urb || !ctrl_req) {
1823 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1824 return -EINVAL;
1825 }
1826
1827 /* initialize */
1828 ctrl_req->wValue = 0;
1829 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1830 ctrl_req->wLength = cpu_to_le16(size);
1831
1832 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1833 /* Reading command */
1834 ctrl_req->bRequestType = USB_DIR_IN |
1835 USB_TYPE_OPTION_VENDOR |
1836 USB_RECIP_INTERFACE;
1837 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1838 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1839 } else {
1840 /* Writing command */
1841 ctrl_req->bRequestType = USB_DIR_OUT |
1842 USB_TYPE_OPTION_VENDOR |
1843 USB_RECIP_INTERFACE;
1844 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1845 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1846 }
1847 /* syslog */
1848 D2("%s command (%02x) len: %d, port: %d",
1849 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1850 ctrl_req->bRequestType, ctrl_req->wLength, port);
1851
1852 /* Load ctrl urb */
1853 ctrl_urb->transfer_flags = 0;
1854 usb_fill_control_urb(ctrl_urb,
1855 serial->parent->usb,
1856 pipe,
1857 (u8 *) ctrl_req,
1858 ctrl_urb_data, size, ctrl_callback, serial);
1859 /* Send it on merry way */
1860 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1861 if (result) {
1862 dev_err(&ctrl_urb->dev->dev,
1863 "%s failed submit ctrl_urb %d type %d\n", __func__,
1864 result, type);
1865 return result;
1866 }
1867
1868 /* done */
1869 return size;
1870 }
1871
1872 /* called by intr_callback when read occurs */
1873 static int hso_mux_serial_read(struct hso_serial *serial)
1874 {
1875 if (!serial)
1876 return -EINVAL;
1877
1878 /* clean data */
1879 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1880 /* make the request */
1881
1882 if (serial->num_rx_urbs != 1) {
1883 dev_err(&serial->parent->interface->dev,
1884 "ERROR: mux'd reads with multiple buffers "
1885 "not possible\n");
1886 return 0;
1887 }
1888 return mux_device_request(serial,
1889 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1890 serial->parent->port_spec & HSO_PORT_MASK,
1891 serial->rx_urb[0],
1892 &serial->ctrl_req_rx,
1893 serial->rx_data[0], serial->rx_data_length);
1894 }
1895
1896 /* used for muxed serial port callback (muxed serial read) */
1897 static void intr_callback(struct urb *urb)
1898 {
1899 struct hso_shared_int *shared_int = urb->context;
1900 struct hso_serial *serial;
1901 unsigned char *port_req;
1902 int status = urb->status;
1903 int i;
1904
1905 usb_mark_last_busy(urb->dev);
1906
1907 /* sanity check */
1908 if (!shared_int)
1909 return;
1910
1911 /* status check */
1912 if (status) {
1913 handle_usb_error(status, __func__, NULL);
1914 return;
1915 }
1916 D4("\n--- Got intr callback 0x%02X ---", status);
1917
1918 /* what request? */
1919 port_req = urb->transfer_buffer;
1920 D4(" port_req = 0x%.2X\n", *port_req);
1921 /* loop over all muxed ports to find the one sending this */
1922 for (i = 0; i < 8; i++) {
1923 /* max 8 channels on MUX */
1924 if (*port_req & (1 << i)) {
1925 serial = get_serial_by_shared_int_and_type(shared_int,
1926 (1 << i));
1927 if (serial != NULL) {
1928 D1("Pending read interrupt on port %d\n", i);
1929 spin_lock(&serial->serial_lock);
1930 if (serial->rx_state == RX_IDLE &&
1931 serial->open_count > 0) {
1932 /* Setup and send a ctrl req read on
1933 * port i */
1934 if (!serial->rx_urb_filled[0]) {
1935 serial->rx_state = RX_SENT;
1936 hso_mux_serial_read(serial);
1937 } else
1938 serial->rx_state = RX_PENDING;
1939 } else {
1940 D1("Already a read pending on "
1941 "port %d or port not open\n", i);
1942 }
1943 spin_unlock(&serial->serial_lock);
1944 }
1945 }
1946 }
1947 /* Resubmit interrupt urb */
1948 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1949 }
1950
1951 /* called for writing to muxed serial port */
1952 static int hso_mux_serial_write_data(struct hso_serial *serial)
1953 {
1954 if (NULL == serial)
1955 return -EINVAL;
1956
1957 return mux_device_request(serial,
1958 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1959 serial->parent->port_spec & HSO_PORT_MASK,
1960 serial->tx_urb,
1961 &serial->ctrl_req_tx,
1962 serial->tx_data, serial->tx_data_count);
1963 }
1964
1965 /* write callback for Diag and CS port */
1966 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1967 {
1968 struct hso_serial *serial = urb->context;
1969 int status = urb->status;
1970 struct tty_struct *tty;
1971
1972 /* sanity check */
1973 if (!serial) {
1974 D1("serial == NULL");
1975 return;
1976 }
1977
1978 spin_lock(&serial->serial_lock);
1979 serial->tx_urb_used = 0;
1980 tty = tty_kref_get(serial->tty);
1981 spin_unlock(&serial->serial_lock);
1982 if (status) {
1983 handle_usb_error(status, __func__, serial->parent);
1984 tty_kref_put(tty);
1985 return;
1986 }
1987 hso_put_activity(serial->parent);
1988 if (tty) {
1989 tty_wakeup(tty);
1990 tty_kref_put(tty);
1991 }
1992 hso_kick_transmit(serial);
1993
1994 D1(" ");
1995 return;
1996 }
1997
1998 /* called for writing diag or CS serial port */
1999 static int hso_std_serial_write_data(struct hso_serial *serial)
2000 {
2001 int count = serial->tx_data_count;
2002 int result;
2003
2004 usb_fill_bulk_urb(serial->tx_urb,
2005 serial->parent->usb,
2006 usb_sndbulkpipe(serial->parent->usb,
2007 serial->out_endp->
2008 bEndpointAddress & 0x7F),
2009 serial->tx_data, serial->tx_data_count,
2010 hso_std_serial_write_bulk_callback, serial);
2011
2012 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2013 if (result) {
2014 dev_warn(&serial->parent->usb->dev,
2015 "Failed to submit urb - res %d\n", result);
2016 return result;
2017 }
2018
2019 return count;
2020 }
2021
2022 /* callback after read or write on muxed serial port */
2023 static void ctrl_callback(struct urb *urb)
2024 {
2025 struct hso_serial *serial = urb->context;
2026 struct usb_ctrlrequest *req;
2027 int status = urb->status;
2028 struct tty_struct *tty;
2029
2030 /* sanity check */
2031 if (!serial)
2032 return;
2033
2034 spin_lock(&serial->serial_lock);
2035 serial->tx_urb_used = 0;
2036 tty = tty_kref_get(serial->tty);
2037 spin_unlock(&serial->serial_lock);
2038 if (status) {
2039 handle_usb_error(status, __func__, serial->parent);
2040 tty_kref_put(tty);
2041 return;
2042 }
2043
2044 /* what request? */
2045 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2046 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2047 D4("Actual length of urb = %d\n", urb->actual_length);
2048 DUMP1(urb->transfer_buffer, urb->actual_length);
2049
2050 if (req->bRequestType ==
2051 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2052 /* response to a read command */
2053 serial->rx_urb_filled[0] = 1;
2054 spin_lock(&serial->serial_lock);
2055 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2056 spin_unlock(&serial->serial_lock);
2057 } else {
2058 hso_put_activity(serial->parent);
2059 if (tty)
2060 tty_wakeup(tty);
2061 /* response to a write command */
2062 hso_kick_transmit(serial);
2063 }
2064 tty_kref_put(tty);
2065 }
2066
2067 /* handle RX data for serial port */
2068 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2069 {
2070 struct tty_struct *tty;
2071 int write_length_remaining = 0;
2072 int curr_write_len;
2073
2074 /* Sanity check */
2075 if (urb == NULL || serial == NULL) {
2076 D1("serial = NULL");
2077 return -2;
2078 }
2079
2080 /* All callers to put_rxbuf_data hold serial_lock */
2081 tty = tty_kref_get(serial->tty);
2082
2083 /* Push data to tty */
2084 if (tty) {
2085 write_length_remaining = urb->actual_length -
2086 serial->curr_rx_urb_offset;
2087 D1("data to push to tty");
2088 while (write_length_remaining) {
2089 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2090 tty_kref_put(tty);
2091 return -1;
2092 }
2093 curr_write_len = tty_insert_flip_string
2094 (tty, urb->transfer_buffer +
2095 serial->curr_rx_urb_offset,
2096 write_length_remaining);
2097 serial->curr_rx_urb_offset += curr_write_len;
2098 write_length_remaining -= curr_write_len;
2099 tty_flip_buffer_push(tty);
2100 }
2101 }
2102 if (write_length_remaining == 0) {
2103 serial->curr_rx_urb_offset = 0;
2104 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2105 }
2106 tty_kref_put(tty);
2107 return write_length_remaining;
2108 }
2109
2110
2111 /* Base driver functions */
2112
2113 static void hso_log_port(struct hso_device *hso_dev)
2114 {
2115 char *port_type;
2116 char port_dev[20];
2117
2118 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2119 case HSO_PORT_CONTROL:
2120 port_type = "Control";
2121 break;
2122 case HSO_PORT_APP:
2123 port_type = "Application";
2124 break;
2125 case HSO_PORT_GPS:
2126 port_type = "GPS";
2127 break;
2128 case HSO_PORT_GPS_CONTROL:
2129 port_type = "GPS control";
2130 break;
2131 case HSO_PORT_APP2:
2132 port_type = "Application2";
2133 break;
2134 case HSO_PORT_PCSC:
2135 port_type = "PCSC";
2136 break;
2137 case HSO_PORT_DIAG:
2138 port_type = "Diagnostic";
2139 break;
2140 case HSO_PORT_DIAG2:
2141 port_type = "Diagnostic2";
2142 break;
2143 case HSO_PORT_MODEM:
2144 port_type = "Modem";
2145 break;
2146 case HSO_PORT_NETWORK:
2147 port_type = "Network";
2148 break;
2149 default:
2150 port_type = "Unknown";
2151 break;
2152 }
2153 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2154 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2155 } else
2156 sprintf(port_dev, "/dev/%s%d", tty_filename,
2157 dev2ser(hso_dev)->minor);
2158
2159 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2160 port_type, port_dev);
2161 }
2162
2163 static int hso_start_net_device(struct hso_device *hso_dev)
2164 {
2165 int i, result = 0;
2166 struct hso_net *hso_net = dev2net(hso_dev);
2167
2168 if (!hso_net)
2169 return -ENODEV;
2170
2171 /* send URBs for all read buffers */
2172 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2173
2174 /* Prep a receive URB */
2175 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2176 hso_dev->usb,
2177 usb_rcvbulkpipe(hso_dev->usb,
2178 hso_net->in_endp->
2179 bEndpointAddress & 0x7F),
2180 hso_net->mux_bulk_rx_buf_pool[i],
2181 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2182 hso_net);
2183
2184 /* Put it out there so the device can send us stuff */
2185 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2186 GFP_NOIO);
2187 if (result)
2188 dev_warn(&hso_dev->usb->dev,
2189 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2190 i, result);
2191 }
2192
2193 return result;
2194 }
2195
2196 static int hso_stop_net_device(struct hso_device *hso_dev)
2197 {
2198 int i;
2199 struct hso_net *hso_net = dev2net(hso_dev);
2200
2201 if (!hso_net)
2202 return -ENODEV;
2203
2204 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2205 if (hso_net->mux_bulk_rx_urb_pool[i])
2206 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2207
2208 }
2209 if (hso_net->mux_bulk_tx_urb)
2210 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2211
2212 return 0;
2213 }
2214
2215 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2216 {
2217 int i, result = 0;
2218 struct hso_serial *serial = dev2ser(hso_dev);
2219
2220 if (!serial)
2221 return -ENODEV;
2222
2223 /* If it is not the MUX port fill in and submit a bulk urb (already
2224 * allocated in hso_serial_start) */
2225 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2226 for (i = 0; i < serial->num_rx_urbs; i++) {
2227 usb_fill_bulk_urb(serial->rx_urb[i],
2228 serial->parent->usb,
2229 usb_rcvbulkpipe(serial->parent->usb,
2230 serial->in_endp->
2231 bEndpointAddress &
2232 0x7F),
2233 serial->rx_data[i],
2234 serial->rx_data_length,
2235 hso_std_serial_read_bulk_callback,
2236 serial);
2237 result = usb_submit_urb(serial->rx_urb[i], flags);
2238 if (result) {
2239 dev_warn(&serial->parent->usb->dev,
2240 "Failed to submit urb - res %d\n",
2241 result);
2242 break;
2243 }
2244 }
2245 } else {
2246 mutex_lock(&serial->shared_int->shared_int_lock);
2247 if (!serial->shared_int->use_count) {
2248 result =
2249 hso_mux_submit_intr_urb(serial->shared_int,
2250 hso_dev->usb, flags);
2251 }
2252 serial->shared_int->use_count++;
2253 mutex_unlock(&serial->shared_int->shared_int_lock);
2254 }
2255 if (serial->tiocmget)
2256 tiocmget_submit_urb(serial,
2257 serial->tiocmget,
2258 serial->parent->usb);
2259 return result;
2260 }
2261
2262 static int hso_stop_serial_device(struct hso_device *hso_dev)
2263 {
2264 int i;
2265 struct hso_serial *serial = dev2ser(hso_dev);
2266 struct hso_tiocmget *tiocmget;
2267
2268 if (!serial)
2269 return -ENODEV;
2270
2271 for (i = 0; i < serial->num_rx_urbs; i++) {
2272 if (serial->rx_urb[i]) {
2273 usb_kill_urb(serial->rx_urb[i]);
2274 serial->rx_urb_filled[i] = 0;
2275 }
2276 }
2277 serial->curr_rx_urb_idx = 0;
2278 serial->curr_rx_urb_offset = 0;
2279
2280 if (serial->tx_urb)
2281 usb_kill_urb(serial->tx_urb);
2282
2283 if (serial->shared_int) {
2284 mutex_lock(&serial->shared_int->shared_int_lock);
2285 if (serial->shared_int->use_count &&
2286 (--serial->shared_int->use_count == 0)) {
2287 struct urb *urb;
2288
2289 urb = serial->shared_int->shared_intr_urb;
2290 if (urb)
2291 usb_kill_urb(urb);
2292 }
2293 mutex_unlock(&serial->shared_int->shared_int_lock);
2294 }
2295 tiocmget = serial->tiocmget;
2296 if (tiocmget) {
2297 wake_up_interruptible(&tiocmget->waitq);
2298 usb_kill_urb(tiocmget->urb);
2299 }
2300
2301 return 0;
2302 }
2303
2304 static void hso_serial_common_free(struct hso_serial *serial)
2305 {
2306 int i;
2307
2308 if (serial->parent->dev)
2309 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2310
2311 tty_unregister_device(tty_drv, serial->minor);
2312
2313 for (i = 0; i < serial->num_rx_urbs; i++) {
2314 /* unlink and free RX URB */
2315 usb_free_urb(serial->rx_urb[i]);
2316 /* free the RX buffer */
2317 kfree(serial->rx_data[i]);
2318 }
2319
2320 /* unlink and free TX URB */
2321 usb_free_urb(serial->tx_urb);
2322 kfree(serial->tx_data);
2323 }
2324
2325 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2326 int rx_size, int tx_size)
2327 {
2328 struct device *dev;
2329 int minor;
2330 int i;
2331
2332 minor = get_free_serial_index();
2333 if (minor < 0)
2334 goto exit;
2335
2336 /* register our minor number */
2337 serial->parent->dev = tty_register_device(tty_drv, minor,
2338 &serial->parent->interface->dev);
2339 dev = serial->parent->dev;
2340 dev_set_drvdata(dev, serial->parent);
2341 i = device_create_file(dev, &dev_attr_hsotype);
2342
2343 /* fill in specific data for later use */
2344 serial->minor = minor;
2345 serial->magic = HSO_SERIAL_MAGIC;
2346 spin_lock_init(&serial->serial_lock);
2347 serial->num_rx_urbs = num_urbs;
2348
2349 /* RX, allocate urb and initialize */
2350
2351 /* prepare our RX buffer */
2352 serial->rx_data_length = rx_size;
2353 for (i = 0; i < serial->num_rx_urbs; i++) {
2354 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2355 if (!serial->rx_urb[i]) {
2356 dev_err(dev, "Could not allocate urb?\n");
2357 goto exit;
2358 }
2359 serial->rx_urb[i]->transfer_buffer = NULL;
2360 serial->rx_urb[i]->transfer_buffer_length = 0;
2361 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2362 GFP_KERNEL);
2363 if (!serial->rx_data[i]) {
2364 dev_err(dev, "%s - Out of memory\n", __func__);
2365 goto exit;
2366 }
2367 }
2368
2369 /* TX, allocate urb and initialize */
2370 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2371 if (!serial->tx_urb) {
2372 dev_err(dev, "Could not allocate urb?\n");
2373 goto exit;
2374 }
2375 serial->tx_urb->transfer_buffer = NULL;
2376 serial->tx_urb->transfer_buffer_length = 0;
2377 /* prepare our TX buffer */
2378 serial->tx_data_count = 0;
2379 serial->tx_buffer_count = 0;
2380 serial->tx_data_length = tx_size;
2381 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2382 if (!serial->tx_data) {
2383 dev_err(dev, "%s - Out of memory\n", __func__);
2384 goto exit;
2385 }
2386 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2387 if (!serial->tx_buffer) {
2388 dev_err(dev, "%s - Out of memory\n", __func__);
2389 goto exit;
2390 }
2391
2392 return 0;
2393 exit:
2394 hso_serial_common_free(serial);
2395 return -1;
2396 }
2397
2398 /* Creates a general hso device */
2399 static struct hso_device *hso_create_device(struct usb_interface *intf,
2400 int port_spec)
2401 {
2402 struct hso_device *hso_dev;
2403
2404 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2405 if (!hso_dev)
2406 return NULL;
2407
2408 hso_dev->port_spec = port_spec;
2409 hso_dev->usb = interface_to_usbdev(intf);
2410 hso_dev->interface = intf;
2411 kref_init(&hso_dev->ref);
2412 mutex_init(&hso_dev->mutex);
2413
2414 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2415 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2416 INIT_WORK(&hso_dev->reset_device, reset_device);
2417
2418 return hso_dev;
2419 }
2420
2421 /* Removes a network device in the network device table */
2422 static int remove_net_device(struct hso_device *hso_dev)
2423 {
2424 int i;
2425
2426 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2427 if (network_table[i] == hso_dev) {
2428 network_table[i] = NULL;
2429 break;
2430 }
2431 }
2432 if (i == HSO_MAX_NET_DEVICES)
2433 return -1;
2434 return 0;
2435 }
2436
2437 /* Frees our network device */
2438 static void hso_free_net_device(struct hso_device *hso_dev)
2439 {
2440 int i;
2441 struct hso_net *hso_net = dev2net(hso_dev);
2442
2443 if (!hso_net)
2444 return;
2445
2446 remove_net_device(hso_net->parent);
2447
2448 if (hso_net->net) {
2449 unregister_netdev(hso_net->net);
2450 free_netdev(hso_net->net);
2451 }
2452
2453 /* start freeing */
2454 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2455 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2456 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2457 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2458 }
2459 usb_free_urb(hso_net->mux_bulk_tx_urb);
2460 kfree(hso_net->mux_bulk_tx_buf);
2461 hso_net->mux_bulk_tx_buf = NULL;
2462
2463 kfree(hso_dev);
2464 }
2465
2466 static const struct net_device_ops hso_netdev_ops = {
2467 .ndo_open = hso_net_open,
2468 .ndo_stop = hso_net_close,
2469 .ndo_start_xmit = hso_net_start_xmit,
2470 .ndo_tx_timeout = hso_net_tx_timeout,
2471 };
2472
2473 /* initialize the network interface */
2474 static void hso_net_init(struct net_device *net)
2475 {
2476 struct hso_net *hso_net = netdev_priv(net);
2477
2478 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2479
2480 /* fill in the other fields */
2481 net->netdev_ops = &hso_netdev_ops;
2482 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2483 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2484 net->type = ARPHRD_NONE;
2485 net->mtu = DEFAULT_MTU - 14;
2486 net->tx_queue_len = 10;
2487 SET_ETHTOOL_OPS(net, &ops);
2488
2489 /* and initialize the semaphore */
2490 spin_lock_init(&hso_net->net_lock);
2491 }
2492
2493 /* Adds a network device in the network device table */
2494 static int add_net_device(struct hso_device *hso_dev)
2495 {
2496 int i;
2497
2498 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2499 if (network_table[i] == NULL) {
2500 network_table[i] = hso_dev;
2501 break;
2502 }
2503 }
2504 if (i == HSO_MAX_NET_DEVICES)
2505 return -1;
2506 return 0;
2507 }
2508
2509 static int hso_rfkill_set_block(void *data, bool blocked)
2510 {
2511 struct hso_device *hso_dev = data;
2512 int enabled = !blocked;
2513 int rv;
2514
2515 mutex_lock(&hso_dev->mutex);
2516 if (hso_dev->usb_gone)
2517 rv = 0;
2518 else
2519 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2520 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2521 USB_CTRL_SET_TIMEOUT);
2522 mutex_unlock(&hso_dev->mutex);
2523 return rv;
2524 }
2525
2526 static const struct rfkill_ops hso_rfkill_ops = {
2527 .set_block = hso_rfkill_set_block,
2528 };
2529
2530 /* Creates and sets up everything for rfkill */
2531 static void hso_create_rfkill(struct hso_device *hso_dev,
2532 struct usb_interface *interface)
2533 {
2534 struct hso_net *hso_net = dev2net(hso_dev);
2535 struct device *dev = &hso_net->net->dev;
2536 char *rfkn;
2537
2538 rfkn = kzalloc(20, GFP_KERNEL);
2539 if (!rfkn)
2540 dev_err(dev, "%s - Out of memory\n", __func__);
2541
2542 snprintf(rfkn, 20, "hso-%d",
2543 interface->altsetting->desc.bInterfaceNumber);
2544
2545 hso_net->rfkill = rfkill_alloc(rfkn,
2546 &interface_to_usbdev(interface)->dev,
2547 RFKILL_TYPE_WWAN,
2548 &hso_rfkill_ops, hso_dev);
2549 if (!hso_net->rfkill) {
2550 dev_err(dev, "%s - Out of memory\n", __func__);
2551 kfree(rfkn);
2552 return;
2553 }
2554 if (rfkill_register(hso_net->rfkill) < 0) {
2555 rfkill_destroy(hso_net->rfkill);
2556 kfree(rfkn);
2557 hso_net->rfkill = NULL;
2558 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2559 return;
2560 }
2561 }
2562
2563 static struct device_type hso_type = {
2564 .name = "wwan",
2565 };
2566
2567 /* Creates our network device */
2568 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2569 int port_spec)
2570 {
2571 int result, i;
2572 struct net_device *net;
2573 struct hso_net *hso_net;
2574 struct hso_device *hso_dev;
2575
2576 hso_dev = hso_create_device(interface, port_spec);
2577 if (!hso_dev)
2578 return NULL;
2579
2580 /* allocate our network device, then we can put in our private data */
2581 /* call hso_net_init to do the basic initialization */
2582 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2583 if (!net) {
2584 dev_err(&interface->dev, "Unable to create ethernet device\n");
2585 goto exit;
2586 }
2587
2588 hso_net = netdev_priv(net);
2589
2590 hso_dev->port_data.dev_net = hso_net;
2591 hso_net->net = net;
2592 hso_net->parent = hso_dev;
2593
2594 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2595 USB_DIR_IN);
2596 if (!hso_net->in_endp) {
2597 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2598 goto exit;
2599 }
2600 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2601 USB_DIR_OUT);
2602 if (!hso_net->out_endp) {
2603 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2604 goto exit;
2605 }
2606 SET_NETDEV_DEV(net, &interface->dev);
2607 SET_NETDEV_DEVTYPE(net, &hso_type);
2608
2609 /* registering our net device */
2610 result = register_netdev(net);
2611 if (result) {
2612 dev_err(&interface->dev, "Failed to register device\n");
2613 goto exit;
2614 }
2615
2616 /* start allocating */
2617 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2618 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2619 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2620 dev_err(&interface->dev, "Could not allocate rx urb\n");
2621 goto exit;
2622 }
2623 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2624 GFP_KERNEL);
2625 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2626 dev_err(&interface->dev, "Could not allocate rx buf\n");
2627 goto exit;
2628 }
2629 }
2630 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2631 if (!hso_net->mux_bulk_tx_urb) {
2632 dev_err(&interface->dev, "Could not allocate tx urb\n");
2633 goto exit;
2634 }
2635 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2636 if (!hso_net->mux_bulk_tx_buf) {
2637 dev_err(&interface->dev, "Could not allocate tx buf\n");
2638 goto exit;
2639 }
2640
2641 add_net_device(hso_dev);
2642
2643 hso_log_port(hso_dev);
2644
2645 hso_create_rfkill(hso_dev, interface);
2646
2647 return hso_dev;
2648 exit:
2649 hso_free_net_device(hso_dev);
2650 return NULL;
2651 }
2652
2653 static void hso_free_tiomget(struct hso_serial *serial)
2654 {
2655 struct hso_tiocmget *tiocmget = serial->tiocmget;
2656 if (tiocmget) {
2657 if (tiocmget->urb) {
2658 usb_free_urb(tiocmget->urb);
2659 tiocmget->urb = NULL;
2660 }
2661 serial->tiocmget = NULL;
2662 kfree(tiocmget);
2663
2664 }
2665 }
2666
2667 /* Frees an AT channel ( goes for both mux and non-mux ) */
2668 static void hso_free_serial_device(struct hso_device *hso_dev)
2669 {
2670 struct hso_serial *serial = dev2ser(hso_dev);
2671
2672 if (!serial)
2673 return;
2674 set_serial_by_index(serial->minor, NULL);
2675
2676 hso_serial_common_free(serial);
2677
2678 if (serial->shared_int) {
2679 mutex_lock(&serial->shared_int->shared_int_lock);
2680 if (--serial->shared_int->ref_count == 0)
2681 hso_free_shared_int(serial->shared_int);
2682 else
2683 mutex_unlock(&serial->shared_int->shared_int_lock);
2684 }
2685 hso_free_tiomget(serial);
2686 kfree(serial);
2687 kfree(hso_dev);
2688 }
2689
2690 /* Creates a bulk AT channel */
2691 static struct hso_device *hso_create_bulk_serial_device(
2692 struct usb_interface *interface, int port)
2693 {
2694 struct hso_device *hso_dev;
2695 struct hso_serial *serial;
2696 int num_urbs;
2697 struct hso_tiocmget *tiocmget;
2698
2699 hso_dev = hso_create_device(interface, port);
2700 if (!hso_dev)
2701 return NULL;
2702
2703 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2704 if (!serial)
2705 goto exit;
2706
2707 serial->parent = hso_dev;
2708 hso_dev->port_data.dev_serial = serial;
2709
2710 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2711 num_urbs = 2;
2712 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2713 GFP_KERNEL);
2714 /* it isn't going to break our heart if serial->tiocmget
2715 * allocation fails don't bother checking this.
2716 */
2717 if (serial->tiocmget) {
2718 tiocmget = serial->tiocmget;
2719 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2720 if (tiocmget->urb) {
2721 mutex_init(&tiocmget->mutex);
2722 init_waitqueue_head(&tiocmget->waitq);
2723 tiocmget->endp = hso_get_ep(
2724 interface,
2725 USB_ENDPOINT_XFER_INT,
2726 USB_DIR_IN);
2727 } else
2728 hso_free_tiomget(serial);
2729 }
2730 }
2731 else
2732 num_urbs = 1;
2733
2734 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2735 BULK_URB_TX_SIZE))
2736 goto exit;
2737
2738 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2739 USB_DIR_IN);
2740 if (!serial->in_endp) {
2741 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2742 goto exit2;
2743 }
2744
2745 if (!
2746 (serial->out_endp =
2747 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2748 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2749 goto exit2;
2750 }
2751
2752 serial->write_data = hso_std_serial_write_data;
2753
2754 /* and record this serial */
2755 set_serial_by_index(serial->minor, serial);
2756
2757 /* setup the proc dirs and files if needed */
2758 hso_log_port(hso_dev);
2759
2760 /* done, return it */
2761 return hso_dev;
2762
2763 exit2:
2764 hso_serial_common_free(serial);
2765 exit:
2766 hso_free_tiomget(serial);
2767 kfree(serial);
2768 kfree(hso_dev);
2769 return NULL;
2770 }
2771
2772 /* Creates a multiplexed AT channel */
2773 static
2774 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2775 int port,
2776 struct hso_shared_int *mux)
2777 {
2778 struct hso_device *hso_dev;
2779 struct hso_serial *serial;
2780 int port_spec;
2781
2782 port_spec = HSO_INTF_MUX;
2783 port_spec &= ~HSO_PORT_MASK;
2784
2785 port_spec |= hso_mux_to_port(port);
2786 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2787 return NULL;
2788
2789 hso_dev = hso_create_device(interface, port_spec);
2790 if (!hso_dev)
2791 return NULL;
2792
2793 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2794 if (!serial)
2795 goto exit;
2796
2797 hso_dev->port_data.dev_serial = serial;
2798 serial->parent = hso_dev;
2799
2800 if (hso_serial_common_create
2801 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2802 goto exit;
2803
2804 serial->tx_data_length--;
2805 serial->write_data = hso_mux_serial_write_data;
2806
2807 serial->shared_int = mux;
2808 mutex_lock(&serial->shared_int->shared_int_lock);
2809 serial->shared_int->ref_count++;
2810 mutex_unlock(&serial->shared_int->shared_int_lock);
2811
2812 /* and record this serial */
2813 set_serial_by_index(serial->minor, serial);
2814
2815 /* setup the proc dirs and files if needed */
2816 hso_log_port(hso_dev);
2817
2818 /* done, return it */
2819 return hso_dev;
2820
2821 exit:
2822 if (serial) {
2823 tty_unregister_device(tty_drv, serial->minor);
2824 kfree(serial);
2825 }
2826 if (hso_dev)
2827 kfree(hso_dev);
2828 return NULL;
2829
2830 }
2831
2832 static void hso_free_shared_int(struct hso_shared_int *mux)
2833 {
2834 usb_free_urb(mux->shared_intr_urb);
2835 kfree(mux->shared_intr_buf);
2836 mutex_unlock(&mux->shared_int_lock);
2837 kfree(mux);
2838 }
2839
2840 static
2841 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2842 {
2843 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2844
2845 if (!mux)
2846 return NULL;
2847
2848 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2849 USB_DIR_IN);
2850 if (!mux->intr_endp) {
2851 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2852 goto exit;
2853 }
2854
2855 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2856 if (!mux->shared_intr_urb) {
2857 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2858 goto exit;
2859 }
2860 mux->shared_intr_buf =
2861 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2862 GFP_KERNEL);
2863 if (!mux->shared_intr_buf) {
2864 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2865 goto exit;
2866 }
2867
2868 mutex_init(&mux->shared_int_lock);
2869
2870 return mux;
2871
2872 exit:
2873 kfree(mux->shared_intr_buf);
2874 usb_free_urb(mux->shared_intr_urb);
2875 kfree(mux);
2876 return NULL;
2877 }
2878
2879 /* Gets the port spec for a certain interface */
2880 static int hso_get_config_data(struct usb_interface *interface)
2881 {
2882 struct usb_device *usbdev = interface_to_usbdev(interface);
2883 u8 config_data[17];
2884 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2885 s32 result;
2886
2887 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2888 0x86, 0xC0, 0, 0, config_data, 17,
2889 USB_CTRL_SET_TIMEOUT) != 0x11) {
2890 return -EIO;
2891 }
2892
2893 switch (config_data[if_num]) {
2894 case 0x0:
2895 result = 0;
2896 break;
2897 case 0x1:
2898 result = HSO_PORT_DIAG;
2899 break;
2900 case 0x2:
2901 result = HSO_PORT_GPS;
2902 break;
2903 case 0x3:
2904 result = HSO_PORT_GPS_CONTROL;
2905 break;
2906 case 0x4:
2907 result = HSO_PORT_APP;
2908 break;
2909 case 0x5:
2910 result = HSO_PORT_APP2;
2911 break;
2912 case 0x6:
2913 result = HSO_PORT_CONTROL;
2914 break;
2915 case 0x7:
2916 result = HSO_PORT_NETWORK;
2917 break;
2918 case 0x8:
2919 result = HSO_PORT_MODEM;
2920 break;
2921 case 0x9:
2922 result = HSO_PORT_MSD;
2923 break;
2924 case 0xa:
2925 result = HSO_PORT_PCSC;
2926 break;
2927 case 0xb:
2928 result = HSO_PORT_VOICE;
2929 break;
2930 default:
2931 result = 0;
2932 }
2933
2934 if (result)
2935 result |= HSO_INTF_BULK;
2936
2937 if (config_data[16] & 0x1)
2938 result |= HSO_INFO_CRC_BUG;
2939
2940 return result;
2941 }
2942
2943 /* called once for each interface upon device insertion */
2944 static int hso_probe(struct usb_interface *interface,
2945 const struct usb_device_id *id)
2946 {
2947 int mux, i, if_num, port_spec;
2948 unsigned char port_mask;
2949 struct hso_device *hso_dev = NULL;
2950 struct hso_shared_int *shared_int;
2951 struct hso_device *tmp_dev = NULL;
2952
2953 if_num = interface->altsetting->desc.bInterfaceNumber;
2954
2955 /* Get the interface/port specification from either driver_info or from
2956 * the device itself */
2957 if (id->driver_info)
2958 port_spec = ((u32 *)(id->driver_info))[if_num];
2959 else
2960 port_spec = hso_get_config_data(interface);
2961
2962 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2963 dev_err(&interface->dev, "Not our interface\n");
2964 return -ENODEV;
2965 }
2966 /* Check if we need to switch to alt interfaces prior to port
2967 * configuration */
2968 if (interface->num_altsetting > 1)
2969 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2970 interface->needs_remote_wakeup = 1;
2971
2972 /* Allocate new hso device(s) */
2973 switch (port_spec & HSO_INTF_MASK) {
2974 case HSO_INTF_MUX:
2975 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2976 /* Create the network device */
2977 if (!disable_net) {
2978 hso_dev = hso_create_net_device(interface,
2979 port_spec);
2980 if (!hso_dev)
2981 goto exit;
2982 tmp_dev = hso_dev;
2983 }
2984 }
2985
2986 if (hso_get_mux_ports(interface, &port_mask))
2987 /* TODO: de-allocate everything */
2988 goto exit;
2989
2990 shared_int = hso_create_shared_int(interface);
2991 if (!shared_int)
2992 goto exit;
2993
2994 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2995 if (port_mask & i) {
2996 hso_dev = hso_create_mux_serial_device(
2997 interface, i, shared_int);
2998 if (!hso_dev)
2999 goto exit;
3000 }
3001 }
3002
3003 if (tmp_dev)
3004 hso_dev = tmp_dev;
3005 break;
3006
3007 case HSO_INTF_BULK:
3008 /* It's a regular bulk interface */
3009 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3010 !disable_net)
3011 hso_dev = hso_create_net_device(interface, port_spec);
3012 else
3013 hso_dev =
3014 hso_create_bulk_serial_device(interface, port_spec);
3015 if (!hso_dev)
3016 goto exit;
3017 break;
3018 default:
3019 goto exit;
3020 }
3021
3022 /* save our data pointer in this device */
3023 usb_set_intfdata(interface, hso_dev);
3024
3025 /* done */
3026 return 0;
3027 exit:
3028 hso_free_interface(interface);
3029 return -ENODEV;
3030 }
3031
3032 /* device removed, cleaning up */
3033 static void hso_disconnect(struct usb_interface *interface)
3034 {
3035 hso_free_interface(interface);
3036
3037 /* remove reference of our private data */
3038 usb_set_intfdata(interface, NULL);
3039 }
3040
3041 static void async_get_intf(struct work_struct *data)
3042 {
3043 struct hso_device *hso_dev =
3044 container_of(data, struct hso_device, async_get_intf);
3045 usb_autopm_get_interface(hso_dev->interface);
3046 }
3047
3048 static void async_put_intf(struct work_struct *data)
3049 {
3050 struct hso_device *hso_dev =
3051 container_of(data, struct hso_device, async_put_intf);
3052 usb_autopm_put_interface(hso_dev->interface);
3053 }
3054
3055 static int hso_get_activity(struct hso_device *hso_dev)
3056 {
3057 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3058 if (!hso_dev->is_active) {
3059 hso_dev->is_active = 1;
3060 schedule_work(&hso_dev->async_get_intf);
3061 }
3062 }
3063
3064 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3065 return -EAGAIN;
3066
3067 usb_mark_last_busy(hso_dev->usb);
3068
3069 return 0;
3070 }
3071
3072 static int hso_put_activity(struct hso_device *hso_dev)
3073 {
3074 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3075 if (hso_dev->is_active) {
3076 hso_dev->is_active = 0;
3077 schedule_work(&hso_dev->async_put_intf);
3078 return -EAGAIN;
3079 }
3080 }
3081 hso_dev->is_active = 0;
3082 return 0;
3083 }
3084
3085 /* called by kernel when we need to suspend device */
3086 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3087 {
3088 int i, result;
3089
3090 /* Stop all serial ports */
3091 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3092 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3093 result = hso_stop_serial_device(serial_table[i]);
3094 if (result)
3095 goto out;
3096 }
3097 }
3098
3099 /* Stop all network ports */
3100 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3101 if (network_table[i] &&
3102 (network_table[i]->interface == iface)) {
3103 result = hso_stop_net_device(network_table[i]);
3104 if (result)
3105 goto out;
3106 }
3107 }
3108
3109 out:
3110 return 0;
3111 }
3112
3113 /* called by kernel when we need to resume device */
3114 static int hso_resume(struct usb_interface *iface)
3115 {
3116 int i, result = 0;
3117 struct hso_net *hso_net;
3118
3119 /* Start all serial ports */
3120 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3121 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3122 if (dev2ser(serial_table[i])->open_count) {
3123 result =
3124 hso_start_serial_device(serial_table[i], GFP_NOIO);
3125 hso_kick_transmit(dev2ser(serial_table[i]));
3126 if (result)
3127 goto out;
3128 }
3129 }
3130 }
3131
3132 /* Start all network ports */
3133 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3134 if (network_table[i] &&
3135 (network_table[i]->interface == iface)) {
3136 hso_net = dev2net(network_table[i]);
3137 if (hso_net->flags & IFF_UP) {
3138 /* First transmit any lingering data,
3139 then restart the device. */
3140 if (hso_net->skb_tx_buf) {
3141 dev_dbg(&iface->dev,
3142 "Transmitting"
3143 " lingering data\n");
3144 hso_net_start_xmit(hso_net->skb_tx_buf,
3145 hso_net->net);
3146 hso_net->skb_tx_buf = NULL;
3147 }
3148 result = hso_start_net_device(network_table[i]);
3149 if (result)
3150 goto out;
3151 }
3152 }
3153 }
3154
3155 out:
3156 return result;
3157 }
3158
3159 static void reset_device(struct work_struct *data)
3160 {
3161 struct hso_device *hso_dev =
3162 container_of(data, struct hso_device, reset_device);
3163 struct usb_device *usb = hso_dev->usb;
3164 int result;
3165
3166 if (hso_dev->usb_gone) {
3167 D1("No reset during disconnect\n");
3168 } else {
3169 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3170 if (result < 0)
3171 D1("unable to lock device for reset: %d\n", result);
3172 else {
3173 usb_reset_device(usb);
3174 usb_unlock_device(usb);
3175 }
3176 }
3177 }
3178
3179 static void hso_serial_ref_free(struct kref *ref)
3180 {
3181 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3182
3183 hso_free_serial_device(hso_dev);
3184 }
3185
3186 static void hso_free_interface(struct usb_interface *interface)
3187 {
3188 struct hso_serial *hso_dev;
3189 struct tty_struct *tty;
3190 int i;
3191
3192 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3193 if (serial_table[i] &&
3194 (serial_table[i]->interface == interface)) {
3195 hso_dev = dev2ser(serial_table[i]);
3196 spin_lock_irq(&hso_dev->serial_lock);
3197 tty = tty_kref_get(hso_dev->tty);
3198 spin_unlock_irq(&hso_dev->serial_lock);
3199 if (tty)
3200 tty_hangup(tty);
3201 mutex_lock(&hso_dev->parent->mutex);
3202 tty_kref_put(tty);
3203 hso_dev->parent->usb_gone = 1;
3204 mutex_unlock(&hso_dev->parent->mutex);
3205 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3206 }
3207 }
3208
3209 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3210 if (network_table[i] &&
3211 (network_table[i]->interface == interface)) {
3212 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3213 /* hso_stop_net_device doesn't stop the net queue since
3214 * traffic needs to start it again when suspended */
3215 netif_stop_queue(dev2net(network_table[i])->net);
3216 hso_stop_net_device(network_table[i]);
3217 cancel_work_sync(&network_table[i]->async_put_intf);
3218 cancel_work_sync(&network_table[i]->async_get_intf);
3219 if (rfk) {
3220 rfkill_unregister(rfk);
3221 rfkill_destroy(rfk);
3222 }
3223 hso_free_net_device(network_table[i]);
3224 }
3225 }
3226 }
3227
3228 /* Helper functions */
3229
3230 /* Get the endpoint ! */
3231 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3232 int type, int dir)
3233 {
3234 int i;
3235 struct usb_host_interface *iface = intf->cur_altsetting;
3236 struct usb_endpoint_descriptor *endp;
3237
3238 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3239 endp = &iface->endpoint[i].desc;
3240 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3241 (usb_endpoint_type(endp) == type))
3242 return endp;
3243 }
3244
3245 return NULL;
3246 }
3247
3248 /* Get the byte that describes which ports are enabled */
3249 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3250 {
3251 int i;
3252 struct usb_host_interface *iface = intf->cur_altsetting;
3253
3254 if (iface->extralen == 3) {
3255 *ports = iface->extra[2];
3256 return 0;
3257 }
3258
3259 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3260 if (iface->endpoint[i].extralen == 3) {
3261 *ports = iface->endpoint[i].extra[2];
3262 return 0;
3263 }
3264 }
3265
3266 return -1;
3267 }
3268
3269 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3270 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3271 struct usb_device *usb, gfp_t gfp)
3272 {
3273 int result;
3274
3275 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3276 usb_rcvintpipe(usb,
3277 shared_int->intr_endp->bEndpointAddress & 0x7F),
3278 shared_int->shared_intr_buf,
3279 1,
3280 intr_callback, shared_int,
3281 shared_int->intr_endp->bInterval);
3282
3283 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3284 if (result)
3285 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3286 result);
3287
3288 return result;
3289 }
3290
3291 /* operations setup of the serial interface */
3292 static const struct tty_operations hso_serial_ops = {
3293 .open = hso_serial_open,
3294 .close = hso_serial_close,
3295 .write = hso_serial_write,
3296 .write_room = hso_serial_write_room,
3297 .ioctl = hso_serial_ioctl,
3298 .set_termios = hso_serial_set_termios,
3299 .chars_in_buffer = hso_serial_chars_in_buffer,
3300 .tiocmget = hso_serial_tiocmget,
3301 .tiocmset = hso_serial_tiocmset,
3302 .unthrottle = hso_unthrottle
3303 };
3304
3305 static struct usb_driver hso_driver = {
3306 .name = driver_name,
3307 .probe = hso_probe,
3308 .disconnect = hso_disconnect,
3309 .id_table = hso_ids,
3310 .suspend = hso_suspend,
3311 .resume = hso_resume,
3312 .reset_resume = hso_resume,
3313 .supports_autosuspend = 1,
3314 };
3315
3316 static int __init hso_init(void)
3317 {
3318 int i;
3319 int result;
3320
3321 /* put it in the log */
3322 printk(KERN_INFO "hso: %s\n", version);
3323
3324 /* Initialise the serial table semaphore and table */
3325 spin_lock_init(&serial_table_lock);
3326 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3327 serial_table[i] = NULL;
3328
3329 /* allocate our driver using the proper amount of supported minors */
3330 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3331 if (!tty_drv)
3332 return -ENOMEM;
3333
3334 /* fill in all needed values */
3335 tty_drv->magic = TTY_DRIVER_MAGIC;
3336 tty_drv->owner = THIS_MODULE;
3337 tty_drv->driver_name = driver_name;
3338 tty_drv->name = tty_filename;
3339
3340 /* if major number is provided as parameter, use that one */
3341 if (tty_major)
3342 tty_drv->major = tty_major;
3343
3344 tty_drv->minor_start = 0;
3345 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3346 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3347 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3348 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3349 tty_drv->init_termios = tty_std_termios;
3350 hso_init_termios(&tty_drv->init_termios);
3351 tty_set_operations(tty_drv, &hso_serial_ops);
3352
3353 /* register the tty driver */
3354 result = tty_register_driver(tty_drv);
3355 if (result) {
3356 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3357 __func__, result);
3358 return result;
3359 }
3360
3361 /* register this module as an usb driver */
3362 result = usb_register(&hso_driver);
3363 if (result) {
3364 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3365 result);
3366 /* cleanup serial interface */
3367 tty_unregister_driver(tty_drv);
3368 return result;
3369 }
3370
3371 /* done */
3372 return 0;
3373 }
3374
3375 static void __exit hso_exit(void)
3376 {
3377 printk(KERN_INFO "hso: unloaded\n");
3378
3379 tty_unregister_driver(tty_drv);
3380 /* deregister the usb driver */
3381 usb_deregister(&hso_driver);
3382 }
3383
3384 /* Module definitions */
3385 module_init(hso_init);
3386 module_exit(hso_exit);
3387
3388 MODULE_AUTHOR(MOD_AUTHOR);
3389 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3390 MODULE_LICENSE(MOD_LICENSE);
3391 MODULE_INFO(Version, DRIVER_VERSION);
3392
3393 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3394 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3395 module_param(debug, int, S_IRUGO | S_IWUSR);
3396
3397 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3398 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3399 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3400
3401 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3402 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3403 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree