TTY: call tty_port_destroy in the rest of drivers
[linux-3.10.git] / drivers / net / usb / hso.c
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 MOD_AUTHOR                      "Option Wireless"
77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
78 #define MOD_LICENSE                     "GPL"
79
80 #define HSO_MAX_NET_DEVICES             10
81 #define HSO__MAX_MTU                    2048
82 #define DEFAULT_MTU                     1500
83 #define DEFAULT_MRU                     1500
84
85 #define CTRL_URB_RX_SIZE                1024
86 #define CTRL_URB_TX_SIZE                64
87
88 #define BULK_URB_RX_SIZE                4096
89 #define BULK_URB_TX_SIZE                8192
90
91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT           4
94 #define USB_TYPE_OPTION_VENDOR          0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING                 0
99
100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
101
102 #define HSO_SERIAL_MAGIC                0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS           256
106
107 #define MAX_RX_URBS                     2
108
109 /*****************************************************************************/
110 /* Debugging functions                                                       */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...)                          \
113         do {                                            \
114                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
115                        __LINE__, __func__, ## arg);     \
116         } while (0)
117
118 #define D_(lvl, args...)                                \
119         do {                                            \
120                 if (lvl & debug)                        \
121                         D__(KERN_INFO, args);           \
122         } while (0)
123
124 #define D1(args...)     D_(0x01, ##args)
125 #define D2(args...)     D_(0x02, ##args)
126 #define D3(args...)     D_(0x04, ##args)
127 #define D4(args...)     D_(0x08, ##args)
128 #define D5(args...)     D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators                                                               */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134         WAIT_IP,
135         WAIT_DATA,
136         WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs                                                                   */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144         struct usb_endpoint_descriptor *intr_endp;
145         void *shared_intr_buf;
146         struct urb *shared_intr_urb;
147         struct usb_device *usb;
148         int use_count;
149         int ref_count;
150         struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154         struct hso_device *parent;
155         struct net_device *net;
156         struct rfkill *rfkill;
157
158         struct usb_endpoint_descriptor *in_endp;
159         struct usb_endpoint_descriptor *out_endp;
160
161         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162         struct urb *mux_bulk_tx_urb;
163         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164         void *mux_bulk_tx_buf;
165
166         struct sk_buff *skb_rx_buf;
167         struct sk_buff *skb_tx_buf;
168
169         enum pkt_parse_state rx_parse_state;
170         spinlock_t net_lock;
171
172         unsigned short rx_buf_size;
173         unsigned short rx_buf_missing;
174         struct iphdr rx_ip_hdr;
175
176         unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180         RX_IDLE,
181         RX_SENT,
182         RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION  (0x20)
187 #define W_VALUE         (0x0)
188 #define W_INDEX         (0x2)
189 #define W_LENGTH        (0x2)
190
191 #define B_OVERRUN       (0x1<<6)
192 #define B_PARITY        (0x1<<5)
193 #define B_FRAMING       (0x1<<4)
194 #define B_RING_SIGNAL   (0x1<<3)
195 #define B_BREAK         (0x1<<2)
196 #define B_TX_CARRIER    (0x1<<1)
197 #define B_RX_CARRIER    (0x1<<0)
198
199 struct hso_serial_state_notification {
200         u8 bmRequestType;
201         u8 bNotification;
202         u16 wValue;
203         u16 wIndex;
204         u16 wLength;
205         u16 UART_state_bitmap;
206 } __packed;
207
208 struct hso_tiocmget {
209         struct mutex mutex;
210         wait_queue_head_t waitq;
211         int    intr_completed;
212         struct usb_endpoint_descriptor *endp;
213         struct urb *urb;
214         struct hso_serial_state_notification serial_state_notification;
215         u16    prev_UART_state_bitmap;
216         struct uart_icount icount;
217 };
218
219
220 struct hso_serial {
221         struct hso_device *parent;
222         int magic;
223         u8 minor;
224
225         struct hso_shared_int *shared_int;
226
227         /* rx/tx urb could be either a bulk urb or a control urb depending
228            on which serial port it is used on. */
229         struct urb *rx_urb[MAX_RX_URBS];
230         u8 num_rx_urbs;
231         u8 *rx_data[MAX_RX_URBS];
232         u16 rx_data_length;     /* should contain allocated length */
233
234         struct urb *tx_urb;
235         u8 *tx_data;
236         u8 *tx_buffer;
237         u16 tx_data_length;     /* should contain allocated length */
238         u16 tx_data_count;
239         u16 tx_buffer_count;
240         struct usb_ctrlrequest ctrl_req_tx;
241         struct usb_ctrlrequest ctrl_req_rx;
242
243         struct usb_endpoint_descriptor *in_endp;
244         struct usb_endpoint_descriptor *out_endp;
245
246         enum rx_ctrl_state rx_state;
247         u8 rts_state;
248         u8 dtr_state;
249         unsigned tx_urb_used:1;
250
251         struct tty_port port;
252         /* from usb_serial_port */
253         spinlock_t serial_lock;
254
255         int (*write_data) (struct hso_serial *serial);
256         struct hso_tiocmget  *tiocmget;
257         /* Hacks required to get flow control
258          * working on the serial receive buffers
259          * so as not to drop characters on the floor.
260          */
261         int  curr_rx_urb_idx;
262         u16  curr_rx_urb_offset;
263         u8   rx_urb_filled[MAX_RX_URBS];
264         struct tasklet_struct unthrottle_tasklet;
265         struct work_struct    retry_unthrottle_workqueue;
266 };
267
268 struct hso_device {
269         union {
270                 struct hso_serial *dev_serial;
271                 struct hso_net *dev_net;
272         } port_data;
273
274         u32 port_spec;
275
276         u8 is_active;
277         u8 usb_gone;
278         struct work_struct async_get_intf;
279         struct work_struct async_put_intf;
280         struct work_struct reset_device;
281
282         struct usb_device *usb;
283         struct usb_interface *interface;
284
285         struct device *dev;
286         struct kref ref;
287         struct mutex mutex;
288 };
289
290 /* Type of interface */
291 #define HSO_INTF_MASK           0xFF00
292 #define HSO_INTF_MUX            0x0100
293 #define HSO_INTF_BULK           0x0200
294
295 /* Type of port */
296 #define HSO_PORT_MASK           0xFF
297 #define HSO_PORT_NO_PORT        0x0
298 #define HSO_PORT_CONTROL        0x1
299 #define HSO_PORT_APP            0x2
300 #define HSO_PORT_GPS            0x3
301 #define HSO_PORT_PCSC           0x4
302 #define HSO_PORT_APP2           0x5
303 #define HSO_PORT_GPS_CONTROL    0x6
304 #define HSO_PORT_MSD            0x7
305 #define HSO_PORT_VOICE          0x8
306 #define HSO_PORT_DIAG2          0x9
307 #define HSO_PORT_DIAG           0x10
308 #define HSO_PORT_MODEM          0x11
309 #define HSO_PORT_NETWORK        0x12
310
311 /* Additional device info */
312 #define HSO_INFO_MASK           0xFF000000
313 #define HSO_INFO_CRC_BUG        0x01000000
314
315 /*****************************************************************************/
316 /* Prototypes                                                                */
317 /*****************************************************************************/
318 /* Serial driver functions */
319 static int hso_serial_tiocmset(struct tty_struct *tty,
320                                unsigned int set, unsigned int clear);
321 static void ctrl_callback(struct urb *urb);
322 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
323 static void hso_kick_transmit(struct hso_serial *serial);
324 /* Helper functions */
325 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326                                    struct usb_device *usb, gfp_t gfp);
327 static void handle_usb_error(int status, const char *function,
328                              struct hso_device *hso_dev);
329 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330                                                   int type, int dir);
331 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332 static void hso_free_interface(struct usb_interface *intf);
333 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334 static int hso_stop_serial_device(struct hso_device *hso_dev);
335 static int hso_start_net_device(struct hso_device *hso_dev);
336 static void hso_free_shared_int(struct hso_shared_int *shared_int);
337 static int hso_stop_net_device(struct hso_device *hso_dev);
338 static void hso_serial_ref_free(struct kref *ref);
339 static void hso_std_serial_read_bulk_callback(struct urb *urb);
340 static int hso_mux_serial_read(struct hso_serial *serial);
341 static void async_get_intf(struct work_struct *data);
342 static void async_put_intf(struct work_struct *data);
343 static int hso_put_activity(struct hso_device *hso_dev);
344 static int hso_get_activity(struct hso_device *hso_dev);
345 static void tiocmget_intr_callback(struct urb *urb);
346 static void reset_device(struct work_struct *data);
347 /*****************************************************************************/
348 /* Helping functions                                                         */
349 /*****************************************************************************/
350
351 /* #define DEBUG */
352
353 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354 {
355         return hso_dev->port_data.dev_net;
356 }
357
358 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359 {
360         return hso_dev->port_data.dev_serial;
361 }
362
363 /* Debugging functions */
364 #ifdef DEBUG
365 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366                      unsigned int len)
367 {
368         static char name[255];
369
370         sprintf(name, "hso[%d:%s]", line_count, func_name);
371         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
372 }
373
374 #define DUMP(buf_, len_)        \
375         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
376
377 #define DUMP1(buf_, len_)                       \
378         do {                                    \
379                 if (0x01 & debug)               \
380                         DUMP(buf_, len_);       \
381         } while (0)
382 #else
383 #define DUMP(buf_, len_)
384 #define DUMP1(buf_, len_)
385 #endif
386
387 /* module parameters */
388 static int debug;
389 static int tty_major;
390 static int disable_net;
391
392 /* driver info */
393 static const char driver_name[] = "hso";
394 static const char tty_filename[] = "ttyHS";
395 static const char *version = __FILE__ ": " MOD_AUTHOR;
396 /* the usb driver itself (registered in hso_init) */
397 static struct usb_driver hso_driver;
398 /* serial structures */
399 static struct tty_driver *tty_drv;
400 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402 static spinlock_t serial_table_lock;
403
404 static const s32 default_port_spec[] = {
405         HSO_INTF_MUX | HSO_PORT_NETWORK,
406         HSO_INTF_BULK | HSO_PORT_DIAG,
407         HSO_INTF_BULK | HSO_PORT_MODEM,
408         0
409 };
410
411 static const s32 icon321_port_spec[] = {
412         HSO_INTF_MUX | HSO_PORT_NETWORK,
413         HSO_INTF_BULK | HSO_PORT_DIAG2,
414         HSO_INTF_BULK | HSO_PORT_MODEM,
415         HSO_INTF_BULK | HSO_PORT_DIAG,
416         0
417 };
418
419 #define default_port_device(vendor, product)    \
420         USB_DEVICE(vendor, product),    \
421                 .driver_info = (kernel_ulong_t)default_port_spec
422
423 #define icon321_port_device(vendor, product)    \
424         USB_DEVICE(vendor, product),    \
425                 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427 /* list of devices we support */
428 static const struct usb_device_id hso_ids[] = {
429         {default_port_device(0x0af0, 0x6711)},
430         {default_port_device(0x0af0, 0x6731)},
431         {default_port_device(0x0af0, 0x6751)},
432         {default_port_device(0x0af0, 0x6771)},
433         {default_port_device(0x0af0, 0x6791)},
434         {default_port_device(0x0af0, 0x6811)},
435         {default_port_device(0x0af0, 0x6911)},
436         {default_port_device(0x0af0, 0x6951)},
437         {default_port_device(0x0af0, 0x6971)},
438         {default_port_device(0x0af0, 0x7011)},
439         {default_port_device(0x0af0, 0x7031)},
440         {default_port_device(0x0af0, 0x7051)},
441         {default_port_device(0x0af0, 0x7071)},
442         {default_port_device(0x0af0, 0x7111)},
443         {default_port_device(0x0af0, 0x7211)},
444         {default_port_device(0x0af0, 0x7251)},
445         {default_port_device(0x0af0, 0x7271)},
446         {default_port_device(0x0af0, 0x7311)},
447         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
448         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
449         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
450         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
451         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
452         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
453         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
454         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
455         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
456         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
457         {USB_DEVICE(0x0af0, 0x7701)},
458         {USB_DEVICE(0x0af0, 0x7706)},
459         {USB_DEVICE(0x0af0, 0x7801)},
460         {USB_DEVICE(0x0af0, 0x7901)},
461         {USB_DEVICE(0x0af0, 0x7A01)},
462         {USB_DEVICE(0x0af0, 0x7A05)},
463         {USB_DEVICE(0x0af0, 0x8200)},
464         {USB_DEVICE(0x0af0, 0x8201)},
465         {USB_DEVICE(0x0af0, 0x8300)},
466         {USB_DEVICE(0x0af0, 0x8302)},
467         {USB_DEVICE(0x0af0, 0x8304)},
468         {USB_DEVICE(0x0af0, 0x8400)},
469         {USB_DEVICE(0x0af0, 0x8600)},
470         {USB_DEVICE(0x0af0, 0x8800)},
471         {USB_DEVICE(0x0af0, 0x8900)},
472         {USB_DEVICE(0x0af0, 0x9000)},
473         {USB_DEVICE(0x0af0, 0xd035)},
474         {USB_DEVICE(0x0af0, 0xd055)},
475         {USB_DEVICE(0x0af0, 0xd155)},
476         {USB_DEVICE(0x0af0, 0xd255)},
477         {USB_DEVICE(0x0af0, 0xd057)},
478         {USB_DEVICE(0x0af0, 0xd157)},
479         {USB_DEVICE(0x0af0, 0xd257)},
480         {USB_DEVICE(0x0af0, 0xd357)},
481         {USB_DEVICE(0x0af0, 0xd058)},
482         {USB_DEVICE(0x0af0, 0xc100)},
483         {}
484 };
485 MODULE_DEVICE_TABLE(usb, hso_ids);
486
487 /* Sysfs attribute */
488 static ssize_t hso_sysfs_show_porttype(struct device *dev,
489                                        struct device_attribute *attr,
490                                        char *buf)
491 {
492         struct hso_device *hso_dev = dev_get_drvdata(dev);
493         char *port_name;
494
495         if (!hso_dev)
496                 return 0;
497
498         switch (hso_dev->port_spec & HSO_PORT_MASK) {
499         case HSO_PORT_CONTROL:
500                 port_name = "Control";
501                 break;
502         case HSO_PORT_APP:
503                 port_name = "Application";
504                 break;
505         case HSO_PORT_APP2:
506                 port_name = "Application2";
507                 break;
508         case HSO_PORT_GPS:
509                 port_name = "GPS";
510                 break;
511         case HSO_PORT_GPS_CONTROL:
512                 port_name = "GPS Control";
513                 break;
514         case HSO_PORT_PCSC:
515                 port_name = "PCSC";
516                 break;
517         case HSO_PORT_DIAG:
518                 port_name = "Diagnostic";
519                 break;
520         case HSO_PORT_DIAG2:
521                 port_name = "Diagnostic2";
522                 break;
523         case HSO_PORT_MODEM:
524                 port_name = "Modem";
525                 break;
526         case HSO_PORT_NETWORK:
527                 port_name = "Network";
528                 break;
529         default:
530                 port_name = "Unknown";
531                 break;
532         }
533
534         return sprintf(buf, "%s\n", port_name);
535 }
536 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
538 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539 {
540         int idx;
541
542         for (idx = 0; idx < serial->num_rx_urbs; idx++)
543                 if (serial->rx_urb[idx] == urb)
544                         return idx;
545         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546         return -1;
547 }
548
549 /* converts mux value to a port spec value */
550 static u32 hso_mux_to_port(int mux)
551 {
552         u32 result;
553
554         switch (mux) {
555         case 0x1:
556                 result = HSO_PORT_CONTROL;
557                 break;
558         case 0x2:
559                 result = HSO_PORT_APP;
560                 break;
561         case 0x4:
562                 result = HSO_PORT_PCSC;
563                 break;
564         case 0x8:
565                 result = HSO_PORT_GPS;
566                 break;
567         case 0x10:
568                 result = HSO_PORT_APP2;
569                 break;
570         default:
571                 result = HSO_PORT_NO_PORT;
572         }
573         return result;
574 }
575
576 /* converts port spec value to a mux value */
577 static u32 hso_port_to_mux(int port)
578 {
579         u32 result;
580
581         switch (port & HSO_PORT_MASK) {
582         case HSO_PORT_CONTROL:
583                 result = 0x0;
584                 break;
585         case HSO_PORT_APP:
586                 result = 0x1;
587                 break;
588         case HSO_PORT_PCSC:
589                 result = 0x2;
590                 break;
591         case HSO_PORT_GPS:
592                 result = 0x3;
593                 break;
594         case HSO_PORT_APP2:
595                 result = 0x4;
596                 break;
597         default:
598                 result = 0x0;
599         }
600         return result;
601 }
602
603 static struct hso_serial *get_serial_by_shared_int_and_type(
604                                         struct hso_shared_int *shared_int,
605                                         int mux)
606 {
607         int i, port;
608
609         port = hso_mux_to_port(mux);
610
611         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
612                 if (serial_table[i] &&
613                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
614                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
615                         return dev2ser(serial_table[i]);
616                 }
617         }
618
619         return NULL;
620 }
621
622 static struct hso_serial *get_serial_by_index(unsigned index)
623 {
624         struct hso_serial *serial = NULL;
625         unsigned long flags;
626
627         spin_lock_irqsave(&serial_table_lock, flags);
628         if (serial_table[index])
629                 serial = dev2ser(serial_table[index]);
630         spin_unlock_irqrestore(&serial_table_lock, flags);
631
632         return serial;
633 }
634
635 static int get_free_serial_index(void)
636 {
637         int index;
638         unsigned long flags;
639
640         spin_lock_irqsave(&serial_table_lock, flags);
641         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642                 if (serial_table[index] == NULL) {
643                         spin_unlock_irqrestore(&serial_table_lock, flags);
644                         return index;
645                 }
646         }
647         spin_unlock_irqrestore(&serial_table_lock, flags);
648
649         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650         return -1;
651 }
652
653 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654 {
655         unsigned long flags;
656
657         spin_lock_irqsave(&serial_table_lock, flags);
658         if (serial)
659                 serial_table[index] = serial->parent;
660         else
661                 serial_table[index] = NULL;
662         spin_unlock_irqrestore(&serial_table_lock, flags);
663 }
664
665 static void handle_usb_error(int status, const char *function,
666                              struct hso_device *hso_dev)
667 {
668         char *explanation;
669
670         switch (status) {
671         case -ENODEV:
672                 explanation = "no device";
673                 break;
674         case -ENOENT:
675                 explanation = "endpoint not enabled";
676                 break;
677         case -EPIPE:
678                 explanation = "endpoint stalled";
679                 break;
680         case -ENOSPC:
681                 explanation = "not enough bandwidth";
682                 break;
683         case -ESHUTDOWN:
684                 explanation = "device disabled";
685                 break;
686         case -EHOSTUNREACH:
687                 explanation = "device suspended";
688                 break;
689         case -EINVAL:
690         case -EAGAIN:
691         case -EFBIG:
692         case -EMSGSIZE:
693                 explanation = "internal error";
694                 break;
695         case -EILSEQ:
696         case -EPROTO:
697         case -ETIME:
698         case -ETIMEDOUT:
699                 explanation = "protocol error";
700                 if (hso_dev)
701                         schedule_work(&hso_dev->reset_device);
702                 break;
703         default:
704                 explanation = "unknown status";
705                 break;
706         }
707
708         /* log a meaningful explanation of an USB status */
709         D1("%s: received USB status - %s (%d)", function, explanation, status);
710 }
711
712 /* Network interface functions */
713
714 /* called when net interface is brought up by ifconfig */
715 static int hso_net_open(struct net_device *net)
716 {
717         struct hso_net *odev = netdev_priv(net);
718         unsigned long flags = 0;
719
720         if (!odev) {
721                 dev_err(&net->dev, "No net device !\n");
722                 return -ENODEV;
723         }
724
725         odev->skb_tx_buf = NULL;
726
727         /* setup environment */
728         spin_lock_irqsave(&odev->net_lock, flags);
729         odev->rx_parse_state = WAIT_IP;
730         odev->rx_buf_size = 0;
731         odev->rx_buf_missing = sizeof(struct iphdr);
732         spin_unlock_irqrestore(&odev->net_lock, flags);
733
734         /* We are up and running. */
735         set_bit(HSO_NET_RUNNING, &odev->flags);
736         hso_start_net_device(odev->parent);
737
738         /* Tell the kernel we are ready to start receiving from it */
739         netif_start_queue(net);
740
741         return 0;
742 }
743
744 /* called when interface is brought down by ifconfig */
745 static int hso_net_close(struct net_device *net)
746 {
747         struct hso_net *odev = netdev_priv(net);
748
749         /* we don't need the queue anymore */
750         netif_stop_queue(net);
751         /* no longer running */
752         clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754         hso_stop_net_device(odev->parent);
755
756         /* done */
757         return 0;
758 }
759
760 /* USB tells is xmit done, we should start the netqueue again */
761 static void write_bulk_callback(struct urb *urb)
762 {
763         struct hso_net *odev = urb->context;
764         int status = urb->status;
765
766         /* Sanity check */
767         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769                 return;
770         }
771
772         /* Do we still have a valid kernel network device? */
773         if (!netif_device_present(odev->net)) {
774                 dev_err(&urb->dev->dev, "%s: net device not present\n",
775                         __func__);
776                 return;
777         }
778
779         /* log status, but don't act on it, we don't need to resubmit anything
780          * anyhow */
781         if (status)
782                 handle_usb_error(status, __func__, odev->parent);
783
784         hso_put_activity(odev->parent);
785
786         /* Tell the network interface we are ready for another frame */
787         netif_wake_queue(odev->net);
788 }
789
790 /* called by kernel when we need to transmit a packet */
791 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792                                             struct net_device *net)
793 {
794         struct hso_net *odev = netdev_priv(net);
795         int result;
796
797         /* Tell the kernel, "No more frames 'til we are done with this one." */
798         netif_stop_queue(net);
799         if (hso_get_activity(odev->parent) == -EAGAIN) {
800                 odev->skb_tx_buf = skb;
801                 return NETDEV_TX_OK;
802         }
803
804         /* log if asked */
805         DUMP1(skb->data, skb->len);
806         /* Copy it from kernel memory to OUR memory */
807         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810         /* Fill in the URB for shipping it out. */
811         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812                           odev->parent->usb,
813                           usb_sndbulkpipe(odev->parent->usb,
814                                           odev->out_endp->
815                                           bEndpointAddress & 0x7F),
816                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817                           odev);
818
819         /* Deal with the Zero Length packet problem, I hope */
820         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822         /* Send the URB on its merry way. */
823         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824         if (result) {
825                 dev_warn(&odev->parent->interface->dev,
826                         "failed mux_bulk_tx_urb %d\n", result);
827                 net->stats.tx_errors++;
828                 netif_start_queue(net);
829         } else {
830                 net->stats.tx_packets++;
831                 net->stats.tx_bytes += skb->len;
832         }
833         dev_kfree_skb(skb);
834         /* we're done */
835         return NETDEV_TX_OK;
836 }
837
838 static const struct ethtool_ops ops = {
839         .get_link = ethtool_op_get_link
840 };
841
842 /* called when a packet did not ack after watchdogtimeout */
843 static void hso_net_tx_timeout(struct net_device *net)
844 {
845         struct hso_net *odev = netdev_priv(net);
846
847         if (!odev)
848                 return;
849
850         /* Tell syslog we are hosed. */
851         dev_warn(&net->dev, "Tx timed out.\n");
852
853         /* Tear the waiting frame off the list */
854         if (odev->mux_bulk_tx_urb &&
855             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
856                 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858         /* Update statistics */
859         net->stats.tx_errors++;
860 }
861
862 /* make a real packet from the received USB buffer */
863 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864                         unsigned int count, unsigned char is_eop)
865 {
866         unsigned short temp_bytes;
867         unsigned short buffer_offset = 0;
868         unsigned short frame_len;
869         unsigned char *tmp_rx_buf;
870
871         /* log if needed */
872         D1("Rx %d bytes", count);
873         DUMP(ip_pkt, min(128, (int)count));
874
875         while (count) {
876                 switch (odev->rx_parse_state) {
877                 case WAIT_IP:
878                         /* waiting for IP header. */
879                         /* wanted bytes - size of ip header */
880                         temp_bytes =
881                             (count <
882                              odev->rx_buf_missing) ? count : odev->
883                             rx_buf_missing;
884
885                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886                                odev->rx_buf_size, ip_pkt + buffer_offset,
887                                temp_bytes);
888
889                         odev->rx_buf_size += temp_bytes;
890                         buffer_offset += temp_bytes;
891                         odev->rx_buf_missing -= temp_bytes;
892                         count -= temp_bytes;
893
894                         if (!odev->rx_buf_missing) {
895                                 /* header is complete allocate an sk_buffer and
896                                  * continue to WAIT_DATA */
897                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899                                 if ((frame_len > DEFAULT_MRU) ||
900                                     (frame_len < sizeof(struct iphdr))) {
901                                         dev_err(&odev->net->dev,
902                                                 "Invalid frame (%d) length\n",
903                                                 frame_len);
904                                         odev->rx_parse_state = WAIT_SYNC;
905                                         continue;
906                                 }
907                                 /* Allocate an sk_buff */
908                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909                                                                     frame_len);
910                                 if (!odev->skb_rx_buf) {
911                                         /* We got no receive buffer. */
912                                         D1("could not allocate memory");
913                                         odev->rx_parse_state = WAIT_SYNC;
914                                         return;
915                                 }
916
917                                 /* Copy what we got so far. make room for iphdr
918                                  * after tail. */
919                                 tmp_rx_buf =
920                                     skb_put(odev->skb_rx_buf,
921                                             sizeof(struct iphdr));
922                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923                                        sizeof(struct iphdr));
924
925                                 /* ETH_HLEN */
926                                 odev->rx_buf_size = sizeof(struct iphdr);
927
928                                 /* Filip actually use .tot_len */
929                                 odev->rx_buf_missing =
930                                     frame_len - sizeof(struct iphdr);
931                                 odev->rx_parse_state = WAIT_DATA;
932                         }
933                         break;
934
935                 case WAIT_DATA:
936                         temp_bytes = (count < odev->rx_buf_missing)
937                                         ? count : odev->rx_buf_missing;
938
939                         /* Copy the rest of the bytes that are left in the
940                          * buffer into the waiting sk_buf. */
941                         /* Make room for temp_bytes after tail. */
942                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945                         odev->rx_buf_missing -= temp_bytes;
946                         count -= temp_bytes;
947                         buffer_offset += temp_bytes;
948                         odev->rx_buf_size += temp_bytes;
949                         if (!odev->rx_buf_missing) {
950                                 /* Packet is complete. Inject into stack. */
951                                 /* We have IP packet here */
952                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
953                                 skb_reset_mac_header(odev->skb_rx_buf);
954
955                                 /* Ship it off to the kernel */
956                                 netif_rx(odev->skb_rx_buf);
957                                 /* No longer our buffer. */
958                                 odev->skb_rx_buf = NULL;
959
960                                 /* update out statistics */
961                                 odev->net->stats.rx_packets++;
962
963                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965                                 odev->rx_buf_size = 0;
966                                 odev->rx_buf_missing = sizeof(struct iphdr);
967                                 odev->rx_parse_state = WAIT_IP;
968                         }
969                         break;
970
971                 case WAIT_SYNC:
972                         D1(" W_S");
973                         count = 0;
974                         break;
975                 default:
976                         D1(" ");
977                         count--;
978                         break;
979                 }
980         }
981
982         /* Recovery mechanism for WAIT_SYNC state. */
983         if (is_eop) {
984                 if (odev->rx_parse_state == WAIT_SYNC) {
985                         odev->rx_parse_state = WAIT_IP;
986                         odev->rx_buf_size = 0;
987                         odev->rx_buf_missing = sizeof(struct iphdr);
988                 }
989         }
990 }
991
992 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993 {
994         static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995         u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997         if (((rest == 5) || (rest == 6)) &&
998             !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999                     crc_check, 4)) {
1000                 urb->actual_length -= 4;
1001         }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007         struct hso_net *odev = urb->context;
1008         struct net_device *net;
1009         int result;
1010         int status = urb->status;
1011
1012         /* is al ok?  (Filip: Who's Al ?) */
1013         if (status) {
1014                 handle_usb_error(status, __func__, odev->parent);
1015                 return;
1016         }
1017
1018         /* Sanity check */
1019         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020                 D1("BULK IN callback but driver is not active!");
1021                 return;
1022         }
1023         usb_mark_last_busy(urb->dev);
1024
1025         net = odev->net;
1026
1027         if (!netif_device_present(net)) {
1028                 /* Somebody killed our network interface... */
1029                 return;
1030         }
1031
1032         if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033                 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035         /* do we even have a packet? */
1036         if (urb->actual_length) {
1037                 /* Handle the IP stream, add header and push it onto network
1038                  * stack if the packet is complete. */
1039                 spin_lock(&odev->net_lock);
1040                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041                             (urb->transfer_buffer_length >
1042                              urb->actual_length) ? 1 : 0);
1043                 spin_unlock(&odev->net_lock);
1044         }
1045
1046         /* We are done with this URB, resubmit it. Prep the USB to wait for
1047          * another frame. Reuse same as received. */
1048         usb_fill_bulk_urb(urb,
1049                           odev->parent->usb,
1050                           usb_rcvbulkpipe(odev->parent->usb,
1051                                           odev->in_endp->
1052                                           bEndpointAddress & 0x7F),
1053                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054                           read_bulk_callback, odev);
1055
1056         /* Give this to the USB subsystem so it can tell us when more data
1057          * arrives. */
1058         result = usb_submit_urb(urb, GFP_ATOMIC);
1059         if (result)
1060                 dev_warn(&odev->parent->interface->dev,
1061                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062                          result);
1063 }
1064
1065 /* Serial driver functions */
1066
1067 static void hso_init_termios(struct ktermios *termios)
1068 {
1069         /*
1070          * The default requirements for this device are:
1071          */
1072         termios->c_iflag &=
1073                 ~(IGNBRK        /* disable ignore break */
1074                 | BRKINT        /* disable break causes interrupt */
1075                 | PARMRK        /* disable mark parity errors */
1076                 | ISTRIP        /* disable clear high bit of input characters */
1077                 | INLCR         /* disable translate NL to CR */
1078                 | IGNCR         /* disable ignore CR */
1079                 | ICRNL         /* disable translate CR to NL */
1080                 | IXON);        /* disable enable XON/XOFF flow control */
1081
1082         /* disable postprocess output characters */
1083         termios->c_oflag &= ~OPOST;
1084
1085         termios->c_lflag &=
1086                 ~(ECHO          /* disable echo input characters */
1087                 | ECHONL        /* disable echo new line */
1088                 | ICANON        /* disable erase, kill, werase, and rprnt
1089                                    special characters */
1090                 | ISIG          /* disable interrupt, quit, and suspend special
1091                                    characters */
1092                 | IEXTEN);      /* disable non-POSIX special characters */
1093
1094         termios->c_cflag &=
1095                 ~(CSIZE         /* no size */
1096                 | PARENB        /* disable parity bit */
1097                 | CBAUD         /* clear current baud rate */
1098                 | CBAUDEX);     /* clear current buad rate */
1099
1100         termios->c_cflag |= CS8;        /* character size 8 bits */
1101
1102         /* baud rate 115200 */
1103         tty_termios_encode_baud_rate(termios, 115200, 115200);
1104 }
1105
1106 static void _hso_serial_set_termios(struct tty_struct *tty,
1107                                     struct ktermios *old)
1108 {
1109         struct hso_serial *serial = tty->driver_data;
1110
1111         if (!serial) {
1112                 printk(KERN_ERR "%s: no tty structures", __func__);
1113                 return;
1114         }
1115
1116         D4("port %d", serial->minor);
1117
1118         /*
1119          *      Fix up unsupported bits
1120          */
1121         tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1122
1123         tty->termios.c_cflag &=
1124                 ~(CSIZE         /* no size */
1125                 | PARENB        /* disable parity bit */
1126                 | CBAUD         /* clear current baud rate */
1127                 | CBAUDEX);     /* clear current buad rate */
1128
1129         tty->termios.c_cflag |= CS8;    /* character size 8 bits */
1130
1131         /* baud rate 115200 */
1132         tty_encode_baud_rate(tty, 115200, 115200);
1133 }
1134
1135 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1136 {
1137         int result;
1138         /* We are done with this URB, resubmit it. Prep the USB to wait for
1139          * another frame */
1140         usb_fill_bulk_urb(urb, serial->parent->usb,
1141                           usb_rcvbulkpipe(serial->parent->usb,
1142                                           serial->in_endp->
1143                                           bEndpointAddress & 0x7F),
1144                           urb->transfer_buffer, serial->rx_data_length,
1145                           hso_std_serial_read_bulk_callback, serial);
1146         /* Give this to the USB subsystem so it can tell us when more data
1147          * arrives. */
1148         result = usb_submit_urb(urb, GFP_ATOMIC);
1149         if (result) {
1150                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151                         __func__, result);
1152         }
1153 }
1154
1155
1156
1157
1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159 {
1160         int count;
1161         struct urb *curr_urb;
1162
1163         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165                 count = put_rxbuf_data(curr_urb, serial);
1166                 if (count == -1)
1167                         return;
1168                 if (count == 0) {
1169                         serial->curr_rx_urb_idx++;
1170                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171                                 serial->curr_rx_urb_idx = 0;
1172                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173                 }
1174         }
1175 }
1176
1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178 {
1179         int count = 0;
1180         struct urb *urb;
1181
1182         urb = serial->rx_urb[0];
1183         if (serial->port.count > 0) {
1184                 count = put_rxbuf_data(urb, serial);
1185                 if (count == -1)
1186                         return;
1187         }
1188         /* Re issue a read as long as we receive data. */
1189
1190         if (count == 0 && ((urb->actual_length != 0) ||
1191                            (serial->rx_state == RX_PENDING))) {
1192                 serial->rx_state = RX_SENT;
1193                 hso_mux_serial_read(serial);
1194         } else
1195                 serial->rx_state = RX_IDLE;
1196 }
1197
1198
1199 /* read callback for Diag and CS port */
1200 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201 {
1202         struct hso_serial *serial = urb->context;
1203         int status = urb->status;
1204
1205         /* sanity check */
1206         if (!serial) {
1207                 D1("serial == NULL");
1208                 return;
1209         } else if (status) {
1210                 handle_usb_error(status, __func__, serial->parent);
1211                 return;
1212         }
1213
1214         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215         D1("Actual length = %d\n", urb->actual_length);
1216         DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218         /* Anyone listening? */
1219         if (serial->port.count == 0)
1220                 return;
1221
1222         if (status == 0) {
1223                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1224                         fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1225                 /* Valid data, handle RX data */
1226                 spin_lock(&serial->serial_lock);
1227                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1228                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1229                 spin_unlock(&serial->serial_lock);
1230         } else if (status == -ENOENT || status == -ECONNRESET) {
1231                 /* Unlinked - check for throttled port. */
1232                 D2("Port %d, successfully unlinked urb", serial->minor);
1233                 spin_lock(&serial->serial_lock);
1234                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1235                 hso_resubmit_rx_bulk_urb(serial, urb);
1236                 spin_unlock(&serial->serial_lock);
1237         } else {
1238                 D2("Port %d, status = %d for read urb", serial->minor, status);
1239                 return;
1240         }
1241 }
1242
1243 /*
1244  * This needs to be a tasklet otherwise we will
1245  * end up recursively calling this function.
1246  */
1247 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1248 {
1249         unsigned long flags;
1250
1251         spin_lock_irqsave(&serial->serial_lock, flags);
1252         if ((serial->parent->port_spec & HSO_INTF_MUX))
1253                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1254         else
1255                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1256         spin_unlock_irqrestore(&serial->serial_lock, flags);
1257 }
1258
1259 static  void hso_unthrottle(struct tty_struct *tty)
1260 {
1261         struct hso_serial *serial = tty->driver_data;
1262
1263         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1264 }
1265
1266 static void hso_unthrottle_workfunc(struct work_struct *work)
1267 {
1268         struct hso_serial *serial =
1269             container_of(work, struct hso_serial,
1270                          retry_unthrottle_workqueue);
1271         hso_unthrottle_tasklet(serial);
1272 }
1273
1274 /* open the requested serial port */
1275 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1276 {
1277         struct hso_serial *serial = get_serial_by_index(tty->index);
1278         int result;
1279
1280         /* sanity check */
1281         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1282                 WARN_ON(1);
1283                 tty->driver_data = NULL;
1284                 D1("Failed to open port");
1285                 return -ENODEV;
1286         }
1287
1288         mutex_lock(&serial->parent->mutex);
1289         result = usb_autopm_get_interface(serial->parent->interface);
1290         if (result < 0)
1291                 goto err_out;
1292
1293         D1("Opening %d", serial->minor);
1294         kref_get(&serial->parent->ref);
1295
1296         /* setup */
1297         tty->driver_data = serial;
1298         tty_port_tty_set(&serial->port, tty);
1299
1300         /* check for port already opened, if not set the termios */
1301         serial->port.count++;
1302         if (serial->port.count == 1) {
1303                 serial->rx_state = RX_IDLE;
1304                 /* Force default termio settings */
1305                 _hso_serial_set_termios(tty, NULL);
1306                 tasklet_init(&serial->unthrottle_tasklet,
1307                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1308                              (unsigned long)serial);
1309                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1310                           hso_unthrottle_workfunc);
1311                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1312                 if (result) {
1313                         hso_stop_serial_device(serial->parent);
1314                         serial->port.count--;
1315                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1316                 }
1317         } else {
1318                 D1("Port was already open");
1319         }
1320
1321         usb_autopm_put_interface(serial->parent->interface);
1322
1323         /* done */
1324         if (result)
1325                 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1326 err_out:
1327         mutex_unlock(&serial->parent->mutex);
1328         return result;
1329 }
1330
1331 /* close the requested serial port */
1332 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1333 {
1334         struct hso_serial *serial = tty->driver_data;
1335         u8 usb_gone;
1336
1337         D1("Closing serial port");
1338
1339         /* Open failed, no close cleanup required */
1340         if (serial == NULL)
1341                 return;
1342
1343         mutex_lock(&serial->parent->mutex);
1344         usb_gone = serial->parent->usb_gone;
1345
1346         if (!usb_gone)
1347                 usb_autopm_get_interface(serial->parent->interface);
1348
1349         /* reset the rts and dtr */
1350         /* do the actual close */
1351         serial->port.count--;
1352
1353         if (serial->port.count <= 0) {
1354                 serial->port.count = 0;
1355                 tty_port_tty_set(&serial->port, NULL);
1356                 if (!usb_gone)
1357                         hso_stop_serial_device(serial->parent);
1358                 tasklet_kill(&serial->unthrottle_tasklet);
1359                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1360         }
1361
1362         if (!usb_gone)
1363                 usb_autopm_put_interface(serial->parent->interface);
1364
1365         mutex_unlock(&serial->parent->mutex);
1366
1367         kref_put(&serial->parent->ref, hso_serial_ref_free);
1368 }
1369
1370 /* close the requested serial port */
1371 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1372                             int count)
1373 {
1374         struct hso_serial *serial = tty->driver_data;
1375         int space, tx_bytes;
1376         unsigned long flags;
1377
1378         /* sanity check */
1379         if (serial == NULL) {
1380                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1381                 return -ENODEV;
1382         }
1383
1384         spin_lock_irqsave(&serial->serial_lock, flags);
1385
1386         space = serial->tx_data_length - serial->tx_buffer_count;
1387         tx_bytes = (count < space) ? count : space;
1388
1389         if (!tx_bytes)
1390                 goto out;
1391
1392         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1393         serial->tx_buffer_count += tx_bytes;
1394
1395 out:
1396         spin_unlock_irqrestore(&serial->serial_lock, flags);
1397
1398         hso_kick_transmit(serial);
1399         /* done */
1400         return tx_bytes;
1401 }
1402
1403 /* how much room is there for writing */
1404 static int hso_serial_write_room(struct tty_struct *tty)
1405 {
1406         struct hso_serial *serial = tty->driver_data;
1407         int room;
1408         unsigned long flags;
1409
1410         spin_lock_irqsave(&serial->serial_lock, flags);
1411         room = serial->tx_data_length - serial->tx_buffer_count;
1412         spin_unlock_irqrestore(&serial->serial_lock, flags);
1413
1414         /* return free room */
1415         return room;
1416 }
1417
1418 /* setup the term */
1419 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1420 {
1421         struct hso_serial *serial = tty->driver_data;
1422         unsigned long flags;
1423
1424         if (old)
1425                 D5("Termios called with: cflags new[%d] - old[%d]",
1426                    tty->termios.c_cflag, old->c_cflag);
1427
1428         /* the actual setup */
1429         spin_lock_irqsave(&serial->serial_lock, flags);
1430         if (serial->port.count)
1431                 _hso_serial_set_termios(tty, old);
1432         else
1433                 tty->termios = *old;
1434         spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436         /* done */
1437 }
1438
1439 /* how many characters in the buffer */
1440 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1441 {
1442         struct hso_serial *serial = tty->driver_data;
1443         int chars;
1444         unsigned long flags;
1445
1446         /* sanity check */
1447         if (serial == NULL)
1448                 return 0;
1449
1450         spin_lock_irqsave(&serial->serial_lock, flags);
1451         chars = serial->tx_buffer_count;
1452         spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454         return chars;
1455 }
1456 static int tiocmget_submit_urb(struct hso_serial *serial,
1457                                struct hso_tiocmget *tiocmget,
1458                                struct usb_device *usb)
1459 {
1460         int result;
1461
1462         if (serial->parent->usb_gone)
1463                 return -ENODEV;
1464         usb_fill_int_urb(tiocmget->urb, usb,
1465                          usb_rcvintpipe(usb,
1466                                         tiocmget->endp->
1467                                         bEndpointAddress & 0x7F),
1468                          &tiocmget->serial_state_notification,
1469                          sizeof(struct hso_serial_state_notification),
1470                          tiocmget_intr_callback, serial,
1471                          tiocmget->endp->bInterval);
1472         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1473         if (result) {
1474                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1475                          result);
1476         }
1477         return result;
1478
1479 }
1480
1481 static void tiocmget_intr_callback(struct urb *urb)
1482 {
1483         struct hso_serial *serial = urb->context;
1484         struct hso_tiocmget *tiocmget;
1485         int status = urb->status;
1486         u16 UART_state_bitmap, prev_UART_state_bitmap;
1487         struct uart_icount *icount;
1488         struct hso_serial_state_notification *serial_state_notification;
1489         struct usb_device *usb;
1490
1491         /* Sanity checks */
1492         if (!serial)
1493                 return;
1494         if (status) {
1495                 handle_usb_error(status, __func__, serial->parent);
1496                 return;
1497         }
1498         tiocmget = serial->tiocmget;
1499         if (!tiocmget)
1500                 return;
1501         usb = serial->parent->usb;
1502         serial_state_notification = &tiocmget->serial_state_notification;
1503         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1504             serial_state_notification->bNotification != B_NOTIFICATION ||
1505             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1506             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1507             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1508                 dev_warn(&usb->dev,
1509                          "hso received invalid serial state notification\n");
1510                 DUMP(serial_state_notification,
1511                      sizeof(struct hso_serial_state_notification));
1512         } else {
1513
1514                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1515                                                 UART_state_bitmap);
1516                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1517                 icount = &tiocmget->icount;
1518                 spin_lock(&serial->serial_lock);
1519                 if ((UART_state_bitmap & B_OVERRUN) !=
1520                    (prev_UART_state_bitmap & B_OVERRUN))
1521                         icount->parity++;
1522                 if ((UART_state_bitmap & B_PARITY) !=
1523                    (prev_UART_state_bitmap & B_PARITY))
1524                         icount->parity++;
1525                 if ((UART_state_bitmap & B_FRAMING) !=
1526                    (prev_UART_state_bitmap & B_FRAMING))
1527                         icount->frame++;
1528                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1529                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1530                         icount->rng++;
1531                 if ((UART_state_bitmap & B_BREAK) !=
1532                    (prev_UART_state_bitmap & B_BREAK))
1533                         icount->brk++;
1534                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1535                    (prev_UART_state_bitmap & B_TX_CARRIER))
1536                         icount->dsr++;
1537                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1538                    (prev_UART_state_bitmap & B_RX_CARRIER))
1539                         icount->dcd++;
1540                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1541                 spin_unlock(&serial->serial_lock);
1542                 tiocmget->intr_completed = 1;
1543                 wake_up_interruptible(&tiocmget->waitq);
1544         }
1545         memset(serial_state_notification, 0,
1546                sizeof(struct hso_serial_state_notification));
1547         tiocmget_submit_urb(serial,
1548                             tiocmget,
1549                             serial->parent->usb);
1550 }
1551
1552 /*
1553  * next few functions largely stolen from drivers/serial/serial_core.c
1554  */
1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1556  * - mask passed in arg for lines of interest
1557  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1558  * Caller should use TIOCGICOUNT to see which one it was
1559  */
1560 static int
1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1562 {
1563         DECLARE_WAITQUEUE(wait, current);
1564         struct uart_icount cprev, cnow;
1565         struct hso_tiocmget  *tiocmget;
1566         int ret;
1567
1568         tiocmget = serial->tiocmget;
1569         if (!tiocmget)
1570                 return -ENOENT;
1571         /*
1572          * note the counters on entry
1573          */
1574         spin_lock_irq(&serial->serial_lock);
1575         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1576         spin_unlock_irq(&serial->serial_lock);
1577         add_wait_queue(&tiocmget->waitq, &wait);
1578         for (;;) {
1579                 spin_lock_irq(&serial->serial_lock);
1580                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1581                 spin_unlock_irq(&serial->serial_lock);
1582                 set_current_state(TASK_INTERRUPTIBLE);
1583                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1584                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1585                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1586                         ret = 0;
1587                         break;
1588                 }
1589                 schedule();
1590                 /* see if a signal did it */
1591                 if (signal_pending(current)) {
1592                         ret = -ERESTARTSYS;
1593                         break;
1594                 }
1595                 cprev = cnow;
1596         }
1597         current->state = TASK_RUNNING;
1598         remove_wait_queue(&tiocmget->waitq, &wait);
1599
1600         return ret;
1601 }
1602
1603 /*
1604  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1605  * Return: write counters to the user passed counter struct
1606  * NB: both 1->0 and 0->1 transitions are counted except for
1607  *     RI where only 0->1 is counted.
1608  */
1609 static int hso_get_count(struct tty_struct *tty,
1610                   struct serial_icounter_struct *icount)
1611 {
1612         struct uart_icount cnow;
1613         struct hso_serial *serial = tty->driver_data;
1614         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1615
1616         memset(icount, 0, sizeof(struct serial_icounter_struct));
1617
1618         if (!tiocmget)
1619                  return -ENOENT;
1620         spin_lock_irq(&serial->serial_lock);
1621         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622         spin_unlock_irq(&serial->serial_lock);
1623
1624         icount->cts         = cnow.cts;
1625         icount->dsr         = cnow.dsr;
1626         icount->rng         = cnow.rng;
1627         icount->dcd         = cnow.dcd;
1628         icount->rx          = cnow.rx;
1629         icount->tx          = cnow.tx;
1630         icount->frame       = cnow.frame;
1631         icount->overrun     = cnow.overrun;
1632         icount->parity      = cnow.parity;
1633         icount->brk         = cnow.brk;
1634         icount->buf_overrun = cnow.buf_overrun;
1635
1636         return 0;
1637 }
1638
1639
1640 static int hso_serial_tiocmget(struct tty_struct *tty)
1641 {
1642         int retval;
1643         struct hso_serial *serial = tty->driver_data;
1644         struct hso_tiocmget  *tiocmget;
1645         u16 UART_state_bitmap;
1646
1647         /* sanity check */
1648         if (!serial) {
1649                 D1("no tty structures");
1650                 return -EINVAL;
1651         }
1652         spin_lock_irq(&serial->serial_lock);
1653         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1654             ((serial->dtr_state) ? TIOCM_DTR : 0);
1655         tiocmget = serial->tiocmget;
1656         if (tiocmget) {
1657
1658                 UART_state_bitmap = le16_to_cpu(
1659                         tiocmget->prev_UART_state_bitmap);
1660                 if (UART_state_bitmap & B_RING_SIGNAL)
1661                         retval |=  TIOCM_RNG;
1662                 if (UART_state_bitmap & B_RX_CARRIER)
1663                         retval |=  TIOCM_CD;
1664                 if (UART_state_bitmap & B_TX_CARRIER)
1665                         retval |=  TIOCM_DSR;
1666         }
1667         spin_unlock_irq(&serial->serial_lock);
1668         return retval;
1669 }
1670
1671 static int hso_serial_tiocmset(struct tty_struct *tty,
1672                                unsigned int set, unsigned int clear)
1673 {
1674         int val = 0;
1675         unsigned long flags;
1676         int if_num;
1677         struct hso_serial *serial = tty->driver_data;
1678
1679         /* sanity check */
1680         if (!serial) {
1681                 D1("no tty structures");
1682                 return -EINVAL;
1683         }
1684
1685         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1686                 return -EINVAL;
1687
1688         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1689
1690         spin_lock_irqsave(&serial->serial_lock, flags);
1691         if (set & TIOCM_RTS)
1692                 serial->rts_state = 1;
1693         if (set & TIOCM_DTR)
1694                 serial->dtr_state = 1;
1695
1696         if (clear & TIOCM_RTS)
1697                 serial->rts_state = 0;
1698         if (clear & TIOCM_DTR)
1699                 serial->dtr_state = 0;
1700
1701         if (serial->dtr_state)
1702                 val |= 0x01;
1703         if (serial->rts_state)
1704                 val |= 0x02;
1705
1706         spin_unlock_irqrestore(&serial->serial_lock, flags);
1707
1708         return usb_control_msg(serial->parent->usb,
1709                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1710                                0x21, val, if_num, NULL, 0,
1711                                USB_CTRL_SET_TIMEOUT);
1712 }
1713
1714 static int hso_serial_ioctl(struct tty_struct *tty,
1715                             unsigned int cmd, unsigned long arg)
1716 {
1717         struct hso_serial *serial = tty->driver_data;
1718         int ret = 0;
1719         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1720
1721         if (!serial)
1722                 return -ENODEV;
1723         switch (cmd) {
1724         case TIOCMIWAIT:
1725                 ret = hso_wait_modem_status(serial, arg);
1726                 break;
1727         default:
1728                 ret = -ENOIOCTLCMD;
1729                 break;
1730         }
1731         return ret;
1732 }
1733
1734
1735 /* starts a transmit */
1736 static void hso_kick_transmit(struct hso_serial *serial)
1737 {
1738         u8 *temp;
1739         unsigned long flags;
1740         int res;
1741
1742         spin_lock_irqsave(&serial->serial_lock, flags);
1743         if (!serial->tx_buffer_count)
1744                 goto out;
1745
1746         if (serial->tx_urb_used)
1747                 goto out;
1748
1749         /* Wakeup USB interface if necessary */
1750         if (hso_get_activity(serial->parent) == -EAGAIN)
1751                 goto out;
1752
1753         /* Switch pointers around to avoid memcpy */
1754         temp = serial->tx_buffer;
1755         serial->tx_buffer = serial->tx_data;
1756         serial->tx_data = temp;
1757         serial->tx_data_count = serial->tx_buffer_count;
1758         serial->tx_buffer_count = 0;
1759
1760         /* If temp is set, it means we switched buffers */
1761         if (temp && serial->write_data) {
1762                 res = serial->write_data(serial);
1763                 if (res >= 0)
1764                         serial->tx_urb_used = 1;
1765         }
1766 out:
1767         spin_unlock_irqrestore(&serial->serial_lock, flags);
1768 }
1769
1770 /* make a request (for reading and writing data to muxed serial port) */
1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1772                               struct urb *ctrl_urb,
1773                               struct usb_ctrlrequest *ctrl_req,
1774                               u8 *ctrl_urb_data, u32 size)
1775 {
1776         int result;
1777         int pipe;
1778
1779         /* Sanity check */
1780         if (!serial || !ctrl_urb || !ctrl_req) {
1781                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1782                 return -EINVAL;
1783         }
1784
1785         /* initialize */
1786         ctrl_req->wValue = 0;
1787         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1788         ctrl_req->wLength = cpu_to_le16(size);
1789
1790         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1791                 /* Reading command */
1792                 ctrl_req->bRequestType = USB_DIR_IN |
1793                                          USB_TYPE_OPTION_VENDOR |
1794                                          USB_RECIP_INTERFACE;
1795                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1796                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1797         } else {
1798                 /* Writing command */
1799                 ctrl_req->bRequestType = USB_DIR_OUT |
1800                                          USB_TYPE_OPTION_VENDOR |
1801                                          USB_RECIP_INTERFACE;
1802                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1803                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1804         }
1805         /* syslog */
1806         D2("%s command (%02x) len: %d, port: %d",
1807            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1808            ctrl_req->bRequestType, ctrl_req->wLength, port);
1809
1810         /* Load ctrl urb */
1811         ctrl_urb->transfer_flags = 0;
1812         usb_fill_control_urb(ctrl_urb,
1813                              serial->parent->usb,
1814                              pipe,
1815                              (u8 *) ctrl_req,
1816                              ctrl_urb_data, size, ctrl_callback, serial);
1817         /* Send it on merry way */
1818         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1819         if (result) {
1820                 dev_err(&ctrl_urb->dev->dev,
1821                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1822                         result, type);
1823                 return result;
1824         }
1825
1826         /* done */
1827         return size;
1828 }
1829
1830 /* called by intr_callback when read occurs */
1831 static int hso_mux_serial_read(struct hso_serial *serial)
1832 {
1833         if (!serial)
1834                 return -EINVAL;
1835
1836         /* clean data */
1837         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1838         /* make the request */
1839
1840         if (serial->num_rx_urbs != 1) {
1841                 dev_err(&serial->parent->interface->dev,
1842                         "ERROR: mux'd reads with multiple buffers "
1843                         "not possible\n");
1844                 return 0;
1845         }
1846         return mux_device_request(serial,
1847                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1848                                   serial->parent->port_spec & HSO_PORT_MASK,
1849                                   serial->rx_urb[0],
1850                                   &serial->ctrl_req_rx,
1851                                   serial->rx_data[0], serial->rx_data_length);
1852 }
1853
1854 /* used for muxed serial port callback (muxed serial read) */
1855 static void intr_callback(struct urb *urb)
1856 {
1857         struct hso_shared_int *shared_int = urb->context;
1858         struct hso_serial *serial;
1859         unsigned char *port_req;
1860         int status = urb->status;
1861         int i;
1862
1863         usb_mark_last_busy(urb->dev);
1864
1865         /* sanity check */
1866         if (!shared_int)
1867                 return;
1868
1869         /* status check */
1870         if (status) {
1871                 handle_usb_error(status, __func__, NULL);
1872                 return;
1873         }
1874         D4("\n--- Got intr callback 0x%02X ---", status);
1875
1876         /* what request? */
1877         port_req = urb->transfer_buffer;
1878         D4(" port_req = 0x%.2X\n", *port_req);
1879         /* loop over all muxed ports to find the one sending this */
1880         for (i = 0; i < 8; i++) {
1881                 /* max 8 channels on MUX */
1882                 if (*port_req & (1 << i)) {
1883                         serial = get_serial_by_shared_int_and_type(shared_int,
1884                                                                    (1 << i));
1885                         if (serial != NULL) {
1886                                 D1("Pending read interrupt on port %d\n", i);
1887                                 spin_lock(&serial->serial_lock);
1888                                 if (serial->rx_state == RX_IDLE &&
1889                                         serial->port.count > 0) {
1890                                         /* Setup and send a ctrl req read on
1891                                          * port i */
1892                                         if (!serial->rx_urb_filled[0]) {
1893                                                 serial->rx_state = RX_SENT;
1894                                                 hso_mux_serial_read(serial);
1895                                         } else
1896                                                 serial->rx_state = RX_PENDING;
1897                                 } else {
1898                                         D1("Already a read pending on "
1899                                            "port %d or port not open\n", i);
1900                                 }
1901                                 spin_unlock(&serial->serial_lock);
1902                         }
1903                 }
1904         }
1905         /* Resubmit interrupt urb */
1906         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1907 }
1908
1909 /* called for writing to muxed serial port */
1910 static int hso_mux_serial_write_data(struct hso_serial *serial)
1911 {
1912         if (NULL == serial)
1913                 return -EINVAL;
1914
1915         return mux_device_request(serial,
1916                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1917                                   serial->parent->port_spec & HSO_PORT_MASK,
1918                                   serial->tx_urb,
1919                                   &serial->ctrl_req_tx,
1920                                   serial->tx_data, serial->tx_data_count);
1921 }
1922
1923 /* write callback for Diag and CS port */
1924 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1925 {
1926         struct hso_serial *serial = urb->context;
1927         int status = urb->status;
1928         struct tty_struct *tty;
1929
1930         /* sanity check */
1931         if (!serial) {
1932                 D1("serial == NULL");
1933                 return;
1934         }
1935
1936         spin_lock(&serial->serial_lock);
1937         serial->tx_urb_used = 0;
1938         spin_unlock(&serial->serial_lock);
1939         if (status) {
1940                 handle_usb_error(status, __func__, serial->parent);
1941                 return;
1942         }
1943         hso_put_activity(serial->parent);
1944         tty = tty_port_tty_get(&serial->port);
1945         if (tty) {
1946                 tty_wakeup(tty);
1947                 tty_kref_put(tty);
1948         }
1949         hso_kick_transmit(serial);
1950
1951         D1(" ");
1952 }
1953
1954 /* called for writing diag or CS serial port */
1955 static int hso_std_serial_write_data(struct hso_serial *serial)
1956 {
1957         int count = serial->tx_data_count;
1958         int result;
1959
1960         usb_fill_bulk_urb(serial->tx_urb,
1961                           serial->parent->usb,
1962                           usb_sndbulkpipe(serial->parent->usb,
1963                                           serial->out_endp->
1964                                           bEndpointAddress & 0x7F),
1965                           serial->tx_data, serial->tx_data_count,
1966                           hso_std_serial_write_bulk_callback, serial);
1967
1968         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969         if (result) {
1970                 dev_warn(&serial->parent->usb->dev,
1971                          "Failed to submit urb - res %d\n", result);
1972                 return result;
1973         }
1974
1975         return count;
1976 }
1977
1978 /* callback after read or write on muxed serial port */
1979 static void ctrl_callback(struct urb *urb)
1980 {
1981         struct hso_serial *serial = urb->context;
1982         struct usb_ctrlrequest *req;
1983         int status = urb->status;
1984
1985         /* sanity check */
1986         if (!serial)
1987                 return;
1988
1989         spin_lock(&serial->serial_lock);
1990         serial->tx_urb_used = 0;
1991         spin_unlock(&serial->serial_lock);
1992         if (status) {
1993                 handle_usb_error(status, __func__, serial->parent);
1994                 return;
1995         }
1996
1997         /* what request? */
1998         req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000         D4("Actual length of urb = %d\n", urb->actual_length);
2001         DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003         if (req->bRequestType ==
2004             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005                 /* response to a read command */
2006                 serial->rx_urb_filled[0] = 1;
2007                 spin_lock(&serial->serial_lock);
2008                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009                 spin_unlock(&serial->serial_lock);
2010         } else {
2011                 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2012                 hso_put_activity(serial->parent);
2013                 if (tty) {
2014                         tty_wakeup(tty);
2015                         tty_kref_put(tty);
2016                 }
2017                 /* response to a write command */
2018                 hso_kick_transmit(serial);
2019         }
2020 }
2021
2022 /* handle RX data for serial port */
2023 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2024 {
2025         struct tty_struct *tty;
2026         int write_length_remaining = 0;
2027         int curr_write_len;
2028
2029         /* Sanity check */
2030         if (urb == NULL || serial == NULL) {
2031                 D1("serial = NULL");
2032                 return -2;
2033         }
2034
2035         tty = tty_port_tty_get(&serial->port);
2036
2037         /* Push data to tty */
2038         if (tty) {
2039                 write_length_remaining = urb->actual_length -
2040                         serial->curr_rx_urb_offset;
2041                 D1("data to push to tty");
2042                 while (write_length_remaining) {
2043                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2044                                 tty_kref_put(tty);
2045                                 return -1;
2046                         }
2047                         curr_write_len =  tty_insert_flip_string
2048                                 (tty, urb->transfer_buffer +
2049                                  serial->curr_rx_urb_offset,
2050                                  write_length_remaining);
2051                         serial->curr_rx_urb_offset += curr_write_len;
2052                         write_length_remaining -= curr_write_len;
2053                         tty_flip_buffer_push(tty);
2054                 }
2055                 tty_kref_put(tty);
2056         }
2057         if (write_length_remaining == 0) {
2058                 serial->curr_rx_urb_offset = 0;
2059                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2060         }
2061         return write_length_remaining;
2062 }
2063
2064
2065 /* Base driver functions */
2066
2067 static void hso_log_port(struct hso_device *hso_dev)
2068 {
2069         char *port_type;
2070         char port_dev[20];
2071
2072         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2073         case HSO_PORT_CONTROL:
2074                 port_type = "Control";
2075                 break;
2076         case HSO_PORT_APP:
2077                 port_type = "Application";
2078                 break;
2079         case HSO_PORT_GPS:
2080                 port_type = "GPS";
2081                 break;
2082         case HSO_PORT_GPS_CONTROL:
2083                 port_type = "GPS control";
2084                 break;
2085         case HSO_PORT_APP2:
2086                 port_type = "Application2";
2087                 break;
2088         case HSO_PORT_PCSC:
2089                 port_type = "PCSC";
2090                 break;
2091         case HSO_PORT_DIAG:
2092                 port_type = "Diagnostic";
2093                 break;
2094         case HSO_PORT_DIAG2:
2095                 port_type = "Diagnostic2";
2096                 break;
2097         case HSO_PORT_MODEM:
2098                 port_type = "Modem";
2099                 break;
2100         case HSO_PORT_NETWORK:
2101                 port_type = "Network";
2102                 break;
2103         default:
2104                 port_type = "Unknown";
2105                 break;
2106         }
2107         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2108                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2109         } else
2110                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2111                         dev2ser(hso_dev)->minor);
2112
2113         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2114                 port_type, port_dev);
2115 }
2116
2117 static int hso_start_net_device(struct hso_device *hso_dev)
2118 {
2119         int i, result = 0;
2120         struct hso_net *hso_net = dev2net(hso_dev);
2121
2122         if (!hso_net)
2123                 return -ENODEV;
2124
2125         /* send URBs for all read buffers */
2126         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2127
2128                 /* Prep a receive URB */
2129                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2130                                   hso_dev->usb,
2131                                   usb_rcvbulkpipe(hso_dev->usb,
2132                                                   hso_net->in_endp->
2133                                                   bEndpointAddress & 0x7F),
2134                                   hso_net->mux_bulk_rx_buf_pool[i],
2135                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2136                                   hso_net);
2137
2138                 /* Put it out there so the device can send us stuff */
2139                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2140                                         GFP_NOIO);
2141                 if (result)
2142                         dev_warn(&hso_dev->usb->dev,
2143                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2144                                 i, result);
2145         }
2146
2147         return result;
2148 }
2149
2150 static int hso_stop_net_device(struct hso_device *hso_dev)
2151 {
2152         int i;
2153         struct hso_net *hso_net = dev2net(hso_dev);
2154
2155         if (!hso_net)
2156                 return -ENODEV;
2157
2158         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2159                 if (hso_net->mux_bulk_rx_urb_pool[i])
2160                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2161
2162         }
2163         if (hso_net->mux_bulk_tx_urb)
2164                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2165
2166         return 0;
2167 }
2168
2169 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2170 {
2171         int i, result = 0;
2172         struct hso_serial *serial = dev2ser(hso_dev);
2173
2174         if (!serial)
2175                 return -ENODEV;
2176
2177         /* If it is not the MUX port fill in and submit a bulk urb (already
2178          * allocated in hso_serial_start) */
2179         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2180                 for (i = 0; i < serial->num_rx_urbs; i++) {
2181                         usb_fill_bulk_urb(serial->rx_urb[i],
2182                                           serial->parent->usb,
2183                                           usb_rcvbulkpipe(serial->parent->usb,
2184                                                           serial->in_endp->
2185                                                           bEndpointAddress &
2186                                                           0x7F),
2187                                           serial->rx_data[i],
2188                                           serial->rx_data_length,
2189                                           hso_std_serial_read_bulk_callback,
2190                                           serial);
2191                         result = usb_submit_urb(serial->rx_urb[i], flags);
2192                         if (result) {
2193                                 dev_warn(&serial->parent->usb->dev,
2194                                          "Failed to submit urb - res %d\n",
2195                                          result);
2196                                 break;
2197                         }
2198                 }
2199         } else {
2200                 mutex_lock(&serial->shared_int->shared_int_lock);
2201                 if (!serial->shared_int->use_count) {
2202                         result =
2203                             hso_mux_submit_intr_urb(serial->shared_int,
2204                                                     hso_dev->usb, flags);
2205                 }
2206                 serial->shared_int->use_count++;
2207                 mutex_unlock(&serial->shared_int->shared_int_lock);
2208         }
2209         if (serial->tiocmget)
2210                 tiocmget_submit_urb(serial,
2211                                     serial->tiocmget,
2212                                     serial->parent->usb);
2213         return result;
2214 }
2215
2216 static int hso_stop_serial_device(struct hso_device *hso_dev)
2217 {
2218         int i;
2219         struct hso_serial *serial = dev2ser(hso_dev);
2220         struct hso_tiocmget  *tiocmget;
2221
2222         if (!serial)
2223                 return -ENODEV;
2224
2225         for (i = 0; i < serial->num_rx_urbs; i++) {
2226                 if (serial->rx_urb[i]) {
2227                                 usb_kill_urb(serial->rx_urb[i]);
2228                                 serial->rx_urb_filled[i] = 0;
2229                 }
2230         }
2231         serial->curr_rx_urb_idx = 0;
2232         serial->curr_rx_urb_offset = 0;
2233
2234         if (serial->tx_urb)
2235                 usb_kill_urb(serial->tx_urb);
2236
2237         if (serial->shared_int) {
2238                 mutex_lock(&serial->shared_int->shared_int_lock);
2239                 if (serial->shared_int->use_count &&
2240                     (--serial->shared_int->use_count == 0)) {
2241                         struct urb *urb;
2242
2243                         urb = serial->shared_int->shared_intr_urb;
2244                         if (urb)
2245                                 usb_kill_urb(urb);
2246                 }
2247                 mutex_unlock(&serial->shared_int->shared_int_lock);
2248         }
2249         tiocmget = serial->tiocmget;
2250         if (tiocmget) {
2251                 wake_up_interruptible(&tiocmget->waitq);
2252                 usb_kill_urb(tiocmget->urb);
2253         }
2254
2255         return 0;
2256 }
2257
2258 static void hso_serial_common_free(struct hso_serial *serial)
2259 {
2260         int i;
2261
2262         if (serial->parent->dev)
2263                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2264
2265         tty_unregister_device(tty_drv, serial->minor);
2266
2267         for (i = 0; i < serial->num_rx_urbs; i++) {
2268                 /* unlink and free RX URB */
2269                 usb_free_urb(serial->rx_urb[i]);
2270                 /* free the RX buffer */
2271                 kfree(serial->rx_data[i]);
2272         }
2273
2274         /* unlink and free TX URB */
2275         usb_free_urb(serial->tx_urb);
2276         kfree(serial->tx_data);
2277         tty_port_destroy(&serial->port);
2278 }
2279
2280 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2281                                     int rx_size, int tx_size)
2282 {
2283         struct device *dev;
2284         int minor;
2285         int i;
2286
2287         tty_port_init(&serial->port);
2288
2289         minor = get_free_serial_index();
2290         if (minor < 0)
2291                 goto exit;
2292
2293         /* register our minor number */
2294         serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2295                         minor, &serial->parent->interface->dev);
2296         dev = serial->parent->dev;
2297         dev_set_drvdata(dev, serial->parent);
2298         i = device_create_file(dev, &dev_attr_hsotype);
2299
2300         /* fill in specific data for later use */
2301         serial->minor = minor;
2302         serial->magic = HSO_SERIAL_MAGIC;
2303         spin_lock_init(&serial->serial_lock);
2304         serial->num_rx_urbs = num_urbs;
2305
2306         /* RX, allocate urb and initialize */
2307
2308         /* prepare our RX buffer */
2309         serial->rx_data_length = rx_size;
2310         for (i = 0; i < serial->num_rx_urbs; i++) {
2311                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2312                 if (!serial->rx_urb[i]) {
2313                         dev_err(dev, "Could not allocate urb?\n");
2314                         goto exit;
2315                 }
2316                 serial->rx_urb[i]->transfer_buffer = NULL;
2317                 serial->rx_urb[i]->transfer_buffer_length = 0;
2318                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2319                                              GFP_KERNEL);
2320                 if (!serial->rx_data[i]) {
2321                         dev_err(dev, "%s - Out of memory\n", __func__);
2322                         goto exit;
2323                 }
2324         }
2325
2326         /* TX, allocate urb and initialize */
2327         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2328         if (!serial->tx_urb) {
2329                 dev_err(dev, "Could not allocate urb?\n");
2330                 goto exit;
2331         }
2332         serial->tx_urb->transfer_buffer = NULL;
2333         serial->tx_urb->transfer_buffer_length = 0;
2334         /* prepare our TX buffer */
2335         serial->tx_data_count = 0;
2336         serial->tx_buffer_count = 0;
2337         serial->tx_data_length = tx_size;
2338         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339         if (!serial->tx_data) {
2340                 dev_err(dev, "%s - Out of memory\n", __func__);
2341                 goto exit;
2342         }
2343         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2344         if (!serial->tx_buffer) {
2345                 dev_err(dev, "%s - Out of memory\n", __func__);
2346                 goto exit;
2347         }
2348
2349         return 0;
2350 exit:
2351         hso_serial_common_free(serial);
2352         return -1;
2353 }
2354
2355 /* Creates a general hso device */
2356 static struct hso_device *hso_create_device(struct usb_interface *intf,
2357                                             int port_spec)
2358 {
2359         struct hso_device *hso_dev;
2360
2361         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2362         if (!hso_dev)
2363                 return NULL;
2364
2365         hso_dev->port_spec = port_spec;
2366         hso_dev->usb = interface_to_usbdev(intf);
2367         hso_dev->interface = intf;
2368         kref_init(&hso_dev->ref);
2369         mutex_init(&hso_dev->mutex);
2370
2371         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2372         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2373         INIT_WORK(&hso_dev->reset_device, reset_device);
2374
2375         return hso_dev;
2376 }
2377
2378 /* Removes a network device in the network device table */
2379 static int remove_net_device(struct hso_device *hso_dev)
2380 {
2381         int i;
2382
2383         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2384                 if (network_table[i] == hso_dev) {
2385                         network_table[i] = NULL;
2386                         break;
2387                 }
2388         }
2389         if (i == HSO_MAX_NET_DEVICES)
2390                 return -1;
2391         return 0;
2392 }
2393
2394 /* Frees our network device */
2395 static void hso_free_net_device(struct hso_device *hso_dev)
2396 {
2397         int i;
2398         struct hso_net *hso_net = dev2net(hso_dev);
2399
2400         if (!hso_net)
2401                 return;
2402
2403         remove_net_device(hso_net->parent);
2404
2405         if (hso_net->net)
2406                 unregister_netdev(hso_net->net);
2407
2408         /* start freeing */
2409         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2410                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2411                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2412                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2413         }
2414         usb_free_urb(hso_net->mux_bulk_tx_urb);
2415         kfree(hso_net->mux_bulk_tx_buf);
2416         hso_net->mux_bulk_tx_buf = NULL;
2417
2418         if (hso_net->net)
2419                 free_netdev(hso_net->net);
2420
2421         kfree(hso_dev);
2422 }
2423
2424 static const struct net_device_ops hso_netdev_ops = {
2425         .ndo_open       = hso_net_open,
2426         .ndo_stop       = hso_net_close,
2427         .ndo_start_xmit = hso_net_start_xmit,
2428         .ndo_tx_timeout = hso_net_tx_timeout,
2429 };
2430
2431 /* initialize the network interface */
2432 static void hso_net_init(struct net_device *net)
2433 {
2434         struct hso_net *hso_net = netdev_priv(net);
2435
2436         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2437
2438         /* fill in the other fields */
2439         net->netdev_ops = &hso_netdev_ops;
2440         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2441         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2442         net->type = ARPHRD_NONE;
2443         net->mtu = DEFAULT_MTU - 14;
2444         net->tx_queue_len = 10;
2445         SET_ETHTOOL_OPS(net, &ops);
2446
2447         /* and initialize the semaphore */
2448         spin_lock_init(&hso_net->net_lock);
2449 }
2450
2451 /* Adds a network device in the network device table */
2452 static int add_net_device(struct hso_device *hso_dev)
2453 {
2454         int i;
2455
2456         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2457                 if (network_table[i] == NULL) {
2458                         network_table[i] = hso_dev;
2459                         break;
2460                 }
2461         }
2462         if (i == HSO_MAX_NET_DEVICES)
2463                 return -1;
2464         return 0;
2465 }
2466
2467 static int hso_rfkill_set_block(void *data, bool blocked)
2468 {
2469         struct hso_device *hso_dev = data;
2470         int enabled = !blocked;
2471         int rv;
2472
2473         mutex_lock(&hso_dev->mutex);
2474         if (hso_dev->usb_gone)
2475                 rv = 0;
2476         else
2477                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2478                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2479                                        USB_CTRL_SET_TIMEOUT);
2480         mutex_unlock(&hso_dev->mutex);
2481         return rv;
2482 }
2483
2484 static const struct rfkill_ops hso_rfkill_ops = {
2485         .set_block = hso_rfkill_set_block,
2486 };
2487
2488 /* Creates and sets up everything for rfkill */
2489 static void hso_create_rfkill(struct hso_device *hso_dev,
2490                              struct usb_interface *interface)
2491 {
2492         struct hso_net *hso_net = dev2net(hso_dev);
2493         struct device *dev = &hso_net->net->dev;
2494         char *rfkn;
2495
2496         rfkn = kzalloc(20, GFP_KERNEL);
2497         if (!rfkn)
2498                 dev_err(dev, "%s - Out of memory\n", __func__);
2499
2500         snprintf(rfkn, 20, "hso-%d",
2501                  interface->altsetting->desc.bInterfaceNumber);
2502
2503         hso_net->rfkill = rfkill_alloc(rfkn,
2504                                        &interface_to_usbdev(interface)->dev,
2505                                        RFKILL_TYPE_WWAN,
2506                                        &hso_rfkill_ops, hso_dev);
2507         if (!hso_net->rfkill) {
2508                 dev_err(dev, "%s - Out of memory\n", __func__);
2509                 kfree(rfkn);
2510                 return;
2511         }
2512         if (rfkill_register(hso_net->rfkill) < 0) {
2513                 rfkill_destroy(hso_net->rfkill);
2514                 kfree(rfkn);
2515                 hso_net->rfkill = NULL;
2516                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2517                 return;
2518         }
2519 }
2520
2521 static struct device_type hso_type = {
2522         .name   = "wwan",
2523 };
2524
2525 /* Creates our network device */
2526 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2527                                                 int port_spec)
2528 {
2529         int result, i;
2530         struct net_device *net;
2531         struct hso_net *hso_net;
2532         struct hso_device *hso_dev;
2533
2534         hso_dev = hso_create_device(interface, port_spec);
2535         if (!hso_dev)
2536                 return NULL;
2537
2538         /* allocate our network device, then we can put in our private data */
2539         /* call hso_net_init to do the basic initialization */
2540         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2541         if (!net) {
2542                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2543                 goto exit;
2544         }
2545
2546         hso_net = netdev_priv(net);
2547
2548         hso_dev->port_data.dev_net = hso_net;
2549         hso_net->net = net;
2550         hso_net->parent = hso_dev;
2551
2552         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2553                                       USB_DIR_IN);
2554         if (!hso_net->in_endp) {
2555                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2556                 goto exit;
2557         }
2558         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2559                                        USB_DIR_OUT);
2560         if (!hso_net->out_endp) {
2561                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2562                 goto exit;
2563         }
2564         SET_NETDEV_DEV(net, &interface->dev);
2565         SET_NETDEV_DEVTYPE(net, &hso_type);
2566
2567         /* registering our net device */
2568         result = register_netdev(net);
2569         if (result) {
2570                 dev_err(&interface->dev, "Failed to register device\n");
2571                 goto exit;
2572         }
2573
2574         /* start allocating */
2575         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2576                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2577                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2578                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2579                         goto exit;
2580                 }
2581                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2582                                                            GFP_KERNEL);
2583                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2584                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2585                         goto exit;
2586                 }
2587         }
2588         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2589         if (!hso_net->mux_bulk_tx_urb) {
2590                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2591                 goto exit;
2592         }
2593         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2594         if (!hso_net->mux_bulk_tx_buf) {
2595                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2596                 goto exit;
2597         }
2598
2599         add_net_device(hso_dev);
2600
2601         hso_log_port(hso_dev);
2602
2603         hso_create_rfkill(hso_dev, interface);
2604
2605         return hso_dev;
2606 exit:
2607         hso_free_net_device(hso_dev);
2608         return NULL;
2609 }
2610
2611 static void hso_free_tiomget(struct hso_serial *serial)
2612 {
2613         struct hso_tiocmget *tiocmget;
2614         if (!serial)
2615                 return;
2616         tiocmget = serial->tiocmget;
2617         if (tiocmget) {
2618                 usb_free_urb(tiocmget->urb);
2619                 tiocmget->urb = NULL;
2620                 serial->tiocmget = NULL;
2621                 kfree(tiocmget);
2622         }
2623 }
2624
2625 /* Frees an AT channel ( goes for both mux and non-mux ) */
2626 static void hso_free_serial_device(struct hso_device *hso_dev)
2627 {
2628         struct hso_serial *serial = dev2ser(hso_dev);
2629
2630         if (!serial)
2631                 return;
2632         set_serial_by_index(serial->minor, NULL);
2633
2634         hso_serial_common_free(serial);
2635
2636         if (serial->shared_int) {
2637                 mutex_lock(&serial->shared_int->shared_int_lock);
2638                 if (--serial->shared_int->ref_count == 0)
2639                         hso_free_shared_int(serial->shared_int);
2640                 else
2641                         mutex_unlock(&serial->shared_int->shared_int_lock);
2642         }
2643         hso_free_tiomget(serial);
2644         kfree(serial);
2645         kfree(hso_dev);
2646 }
2647
2648 /* Creates a bulk AT channel */
2649 static struct hso_device *hso_create_bulk_serial_device(
2650                         struct usb_interface *interface, int port)
2651 {
2652         struct hso_device *hso_dev;
2653         struct hso_serial *serial;
2654         int num_urbs;
2655         struct hso_tiocmget *tiocmget;
2656
2657         hso_dev = hso_create_device(interface, port);
2658         if (!hso_dev)
2659                 return NULL;
2660
2661         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2662         if (!serial)
2663                 goto exit;
2664
2665         serial->parent = hso_dev;
2666         hso_dev->port_data.dev_serial = serial;
2667
2668         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2669                 num_urbs = 2;
2670                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2671                                            GFP_KERNEL);
2672                 /* it isn't going to break our heart if serial->tiocmget
2673                  *  allocation fails don't bother checking this.
2674                  */
2675                 if (serial->tiocmget) {
2676                         tiocmget = serial->tiocmget;
2677                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2678                         if (tiocmget->urb) {
2679                                 mutex_init(&tiocmget->mutex);
2680                                 init_waitqueue_head(&tiocmget->waitq);
2681                                 tiocmget->endp = hso_get_ep(
2682                                         interface,
2683                                         USB_ENDPOINT_XFER_INT,
2684                                         USB_DIR_IN);
2685                         } else
2686                                 hso_free_tiomget(serial);
2687                 }
2688         }
2689         else
2690                 num_urbs = 1;
2691
2692         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2693                                      BULK_URB_TX_SIZE))
2694                 goto exit;
2695
2696         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2697                                      USB_DIR_IN);
2698         if (!serial->in_endp) {
2699                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2700                 goto exit2;
2701         }
2702
2703         if (!
2704             (serial->out_endp =
2705              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2706                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2707                 goto exit2;
2708         }
2709
2710         serial->write_data = hso_std_serial_write_data;
2711
2712         /* and record this serial */
2713         set_serial_by_index(serial->minor, serial);
2714
2715         /* setup the proc dirs and files if needed */
2716         hso_log_port(hso_dev);
2717
2718         /* done, return it */
2719         return hso_dev;
2720
2721 exit2:
2722         hso_serial_common_free(serial);
2723 exit:
2724         hso_free_tiomget(serial);
2725         kfree(serial);
2726         kfree(hso_dev);
2727         return NULL;
2728 }
2729
2730 /* Creates a multiplexed AT channel */
2731 static
2732 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2733                                                 int port,
2734                                                 struct hso_shared_int *mux)
2735 {
2736         struct hso_device *hso_dev;
2737         struct hso_serial *serial;
2738         int port_spec;
2739
2740         port_spec = HSO_INTF_MUX;
2741         port_spec &= ~HSO_PORT_MASK;
2742
2743         port_spec |= hso_mux_to_port(port);
2744         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2745                 return NULL;
2746
2747         hso_dev = hso_create_device(interface, port_spec);
2748         if (!hso_dev)
2749                 return NULL;
2750
2751         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2752         if (!serial)
2753                 goto exit;
2754
2755         hso_dev->port_data.dev_serial = serial;
2756         serial->parent = hso_dev;
2757
2758         if (hso_serial_common_create
2759             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2760                 goto exit;
2761
2762         serial->tx_data_length--;
2763         serial->write_data = hso_mux_serial_write_data;
2764
2765         serial->shared_int = mux;
2766         mutex_lock(&serial->shared_int->shared_int_lock);
2767         serial->shared_int->ref_count++;
2768         mutex_unlock(&serial->shared_int->shared_int_lock);
2769
2770         /* and record this serial */
2771         set_serial_by_index(serial->minor, serial);
2772
2773         /* setup the proc dirs and files if needed */
2774         hso_log_port(hso_dev);
2775
2776         /* done, return it */
2777         return hso_dev;
2778
2779 exit:
2780         if (serial) {
2781                 tty_unregister_device(tty_drv, serial->minor);
2782                 kfree(serial);
2783         }
2784         if (hso_dev)
2785                 kfree(hso_dev);
2786         return NULL;
2787
2788 }
2789
2790 static void hso_free_shared_int(struct hso_shared_int *mux)
2791 {
2792         usb_free_urb(mux->shared_intr_urb);
2793         kfree(mux->shared_intr_buf);
2794         mutex_unlock(&mux->shared_int_lock);
2795         kfree(mux);
2796 }
2797
2798 static
2799 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2800 {
2801         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2802
2803         if (!mux)
2804                 return NULL;
2805
2806         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2807                                     USB_DIR_IN);
2808         if (!mux->intr_endp) {
2809                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2810                 goto exit;
2811         }
2812
2813         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2814         if (!mux->shared_intr_urb) {
2815                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2816                 goto exit;
2817         }
2818         mux->shared_intr_buf =
2819                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2820                         GFP_KERNEL);
2821         if (!mux->shared_intr_buf) {
2822                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2823                 goto exit;
2824         }
2825
2826         mutex_init(&mux->shared_int_lock);
2827
2828         return mux;
2829
2830 exit:
2831         kfree(mux->shared_intr_buf);
2832         usb_free_urb(mux->shared_intr_urb);
2833         kfree(mux);
2834         return NULL;
2835 }
2836
2837 /* Gets the port spec for a certain interface */
2838 static int hso_get_config_data(struct usb_interface *interface)
2839 {
2840         struct usb_device *usbdev = interface_to_usbdev(interface);
2841         u8 config_data[17];
2842         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2843         s32 result;
2844
2845         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2846                             0x86, 0xC0, 0, 0, config_data, 17,
2847                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2848                 return -EIO;
2849         }
2850
2851         switch (config_data[if_num]) {
2852         case 0x0:
2853                 result = 0;
2854                 break;
2855         case 0x1:
2856                 result = HSO_PORT_DIAG;
2857                 break;
2858         case 0x2:
2859                 result = HSO_PORT_GPS;
2860                 break;
2861         case 0x3:
2862                 result = HSO_PORT_GPS_CONTROL;
2863                 break;
2864         case 0x4:
2865                 result = HSO_PORT_APP;
2866                 break;
2867         case 0x5:
2868                 result = HSO_PORT_APP2;
2869                 break;
2870         case 0x6:
2871                 result = HSO_PORT_CONTROL;
2872                 break;
2873         case 0x7:
2874                 result = HSO_PORT_NETWORK;
2875                 break;
2876         case 0x8:
2877                 result = HSO_PORT_MODEM;
2878                 break;
2879         case 0x9:
2880                 result = HSO_PORT_MSD;
2881                 break;
2882         case 0xa:
2883                 result = HSO_PORT_PCSC;
2884                 break;
2885         case 0xb:
2886                 result = HSO_PORT_VOICE;
2887                 break;
2888         default:
2889                 result = 0;
2890         }
2891
2892         if (result)
2893                 result |= HSO_INTF_BULK;
2894
2895         if (config_data[16] & 0x1)
2896                 result |= HSO_INFO_CRC_BUG;
2897
2898         return result;
2899 }
2900
2901 /* called once for each interface upon device insertion */
2902 static int hso_probe(struct usb_interface *interface,
2903                      const struct usb_device_id *id)
2904 {
2905         int mux, i, if_num, port_spec;
2906         unsigned char port_mask;
2907         struct hso_device *hso_dev = NULL;
2908         struct hso_shared_int *shared_int;
2909         struct hso_device *tmp_dev = NULL;
2910
2911         if_num = interface->altsetting->desc.bInterfaceNumber;
2912
2913         /* Get the interface/port specification from either driver_info or from
2914          * the device itself */
2915         if (id->driver_info)
2916                 port_spec = ((u32 *)(id->driver_info))[if_num];
2917         else
2918                 port_spec = hso_get_config_data(interface);
2919
2920         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2921                 dev_err(&interface->dev, "Not our interface\n");
2922                 return -ENODEV;
2923         }
2924         /* Check if we need to switch to alt interfaces prior to port
2925          * configuration */
2926         if (interface->num_altsetting > 1)
2927                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2928         interface->needs_remote_wakeup = 1;
2929
2930         /* Allocate new hso device(s) */
2931         switch (port_spec & HSO_INTF_MASK) {
2932         case HSO_INTF_MUX:
2933                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2934                         /* Create the network device */
2935                         if (!disable_net) {
2936                                 hso_dev = hso_create_net_device(interface,
2937                                                                 port_spec);
2938                                 if (!hso_dev)
2939                                         goto exit;
2940                                 tmp_dev = hso_dev;
2941                         }
2942                 }
2943
2944                 if (hso_get_mux_ports(interface, &port_mask))
2945                         /* TODO: de-allocate everything */
2946                         goto exit;
2947
2948                 shared_int = hso_create_shared_int(interface);
2949                 if (!shared_int)
2950                         goto exit;
2951
2952                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2953                         if (port_mask & i) {
2954                                 hso_dev = hso_create_mux_serial_device(
2955                                                 interface, i, shared_int);
2956                                 if (!hso_dev)
2957                                         goto exit;
2958                         }
2959                 }
2960
2961                 if (tmp_dev)
2962                         hso_dev = tmp_dev;
2963                 break;
2964
2965         case HSO_INTF_BULK:
2966                 /* It's a regular bulk interface */
2967                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2968                         if (!disable_net)
2969                                 hso_dev =
2970                                     hso_create_net_device(interface, port_spec);
2971                 } else {
2972                         hso_dev =
2973                             hso_create_bulk_serial_device(interface, port_spec);
2974                 }
2975                 if (!hso_dev)
2976                         goto exit;
2977                 break;
2978         default:
2979                 goto exit;
2980         }
2981
2982         /* save our data pointer in this device */
2983         usb_set_intfdata(interface, hso_dev);
2984
2985         /* done */
2986         return 0;
2987 exit:
2988         hso_free_interface(interface);
2989         return -ENODEV;
2990 }
2991
2992 /* device removed, cleaning up */
2993 static void hso_disconnect(struct usb_interface *interface)
2994 {
2995         hso_free_interface(interface);
2996
2997         /* remove reference of our private data */
2998         usb_set_intfdata(interface, NULL);
2999 }
3000
3001 static void async_get_intf(struct work_struct *data)
3002 {
3003         struct hso_device *hso_dev =
3004             container_of(data, struct hso_device, async_get_intf);
3005         usb_autopm_get_interface(hso_dev->interface);
3006 }
3007
3008 static void async_put_intf(struct work_struct *data)
3009 {
3010         struct hso_device *hso_dev =
3011             container_of(data, struct hso_device, async_put_intf);
3012         usb_autopm_put_interface(hso_dev->interface);
3013 }
3014
3015 static int hso_get_activity(struct hso_device *hso_dev)
3016 {
3017         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3018                 if (!hso_dev->is_active) {
3019                         hso_dev->is_active = 1;
3020                         schedule_work(&hso_dev->async_get_intf);
3021                 }
3022         }
3023
3024         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3025                 return -EAGAIN;
3026
3027         usb_mark_last_busy(hso_dev->usb);
3028
3029         return 0;
3030 }
3031
3032 static int hso_put_activity(struct hso_device *hso_dev)
3033 {
3034         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3035                 if (hso_dev->is_active) {
3036                         hso_dev->is_active = 0;
3037                         schedule_work(&hso_dev->async_put_intf);
3038                         return -EAGAIN;
3039                 }
3040         }
3041         hso_dev->is_active = 0;
3042         return 0;
3043 }
3044
3045 /* called by kernel when we need to suspend device */
3046 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3047 {
3048         int i, result;
3049
3050         /* Stop all serial ports */
3051         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053                         result = hso_stop_serial_device(serial_table[i]);
3054                         if (result)
3055                                 goto out;
3056                 }
3057         }
3058
3059         /* Stop all network ports */
3060         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061                 if (network_table[i] &&
3062                     (network_table[i]->interface == iface)) {
3063                         result = hso_stop_net_device(network_table[i]);
3064                         if (result)
3065                                 goto out;
3066                 }
3067         }
3068
3069 out:
3070         return 0;
3071 }
3072
3073 /* called by kernel when we need to resume device */
3074 static int hso_resume(struct usb_interface *iface)
3075 {
3076         int i, result = 0;
3077         struct hso_net *hso_net;
3078
3079         /* Start all serial ports */
3080         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082                         if (dev2ser(serial_table[i])->port.count) {
3083                                 result =
3084                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3085                                 hso_kick_transmit(dev2ser(serial_table[i]));
3086                                 if (result)
3087                                         goto out;
3088                         }
3089                 }
3090         }
3091
3092         /* Start all network ports */
3093         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3094                 if (network_table[i] &&
3095                     (network_table[i]->interface == iface)) {
3096                         hso_net = dev2net(network_table[i]);
3097                         if (hso_net->flags & IFF_UP) {
3098                                 /* First transmit any lingering data,
3099                                    then restart the device. */
3100                                 if (hso_net->skb_tx_buf) {
3101                                         dev_dbg(&iface->dev,
3102                                                 "Transmitting"
3103                                                 " lingering data\n");
3104                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3105                                                            hso_net->net);
3106                                         hso_net->skb_tx_buf = NULL;
3107                                 }
3108                                 result = hso_start_net_device(network_table[i]);
3109                                 if (result)
3110                                         goto out;
3111                         }
3112                 }
3113         }
3114
3115 out:
3116         return result;
3117 }
3118
3119 static void reset_device(struct work_struct *data)
3120 {
3121         struct hso_device *hso_dev =
3122             container_of(data, struct hso_device, reset_device);
3123         struct usb_device *usb = hso_dev->usb;
3124         int result;
3125
3126         if (hso_dev->usb_gone) {
3127                 D1("No reset during disconnect\n");
3128         } else {
3129                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3130                 if (result < 0)
3131                         D1("unable to lock device for reset: %d\n", result);
3132                 else {
3133                         usb_reset_device(usb);
3134                         usb_unlock_device(usb);
3135                 }
3136         }
3137 }
3138
3139 static void hso_serial_ref_free(struct kref *ref)
3140 {
3141         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3142
3143         hso_free_serial_device(hso_dev);
3144 }
3145
3146 static void hso_free_interface(struct usb_interface *interface)
3147 {
3148         struct hso_serial *hso_dev;
3149         struct tty_struct *tty;
3150         int i;
3151
3152         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3153                 if (serial_table[i] &&
3154                     (serial_table[i]->interface == interface)) {
3155                         hso_dev = dev2ser(serial_table[i]);
3156                         tty = tty_port_tty_get(&hso_dev->port);
3157                         if (tty) {
3158                                 tty_hangup(tty);
3159                                 tty_kref_put(tty);
3160                         }
3161                         mutex_lock(&hso_dev->parent->mutex);
3162                         hso_dev->parent->usb_gone = 1;
3163                         mutex_unlock(&hso_dev->parent->mutex);
3164                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3165                 }
3166         }
3167
3168         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3169                 if (network_table[i] &&
3170                     (network_table[i]->interface == interface)) {
3171                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3172                         /* hso_stop_net_device doesn't stop the net queue since
3173                          * traffic needs to start it again when suspended */
3174                         netif_stop_queue(dev2net(network_table[i])->net);
3175                         hso_stop_net_device(network_table[i]);
3176                         cancel_work_sync(&network_table[i]->async_put_intf);
3177                         cancel_work_sync(&network_table[i]->async_get_intf);
3178                         if (rfk) {
3179                                 rfkill_unregister(rfk);
3180                                 rfkill_destroy(rfk);
3181                         }
3182                         hso_free_net_device(network_table[i]);
3183                 }
3184         }
3185 }
3186
3187 /* Helper functions */
3188
3189 /* Get the endpoint ! */
3190 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3191                                                   int type, int dir)
3192 {
3193         int i;
3194         struct usb_host_interface *iface = intf->cur_altsetting;
3195         struct usb_endpoint_descriptor *endp;
3196
3197         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3198                 endp = &iface->endpoint[i].desc;
3199                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3200                     (usb_endpoint_type(endp) == type))
3201                         return endp;
3202         }
3203
3204         return NULL;
3205 }
3206
3207 /* Get the byte that describes which ports are enabled */
3208 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3209 {
3210         int i;
3211         struct usb_host_interface *iface = intf->cur_altsetting;
3212
3213         if (iface->extralen == 3) {
3214                 *ports = iface->extra[2];
3215                 return 0;
3216         }
3217
3218         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3219                 if (iface->endpoint[i].extralen == 3) {
3220                         *ports = iface->endpoint[i].extra[2];
3221                         return 0;
3222                 }
3223         }
3224
3225         return -1;
3226 }
3227
3228 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3229 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3230                                    struct usb_device *usb, gfp_t gfp)
3231 {
3232         int result;
3233
3234         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3235                          usb_rcvintpipe(usb,
3236                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3237                          shared_int->shared_intr_buf,
3238                          1,
3239                          intr_callback, shared_int,
3240                          shared_int->intr_endp->bInterval);
3241
3242         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3243         if (result)
3244                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3245                         result);
3246
3247         return result;
3248 }
3249
3250 /* operations setup of the serial interface */
3251 static const struct tty_operations hso_serial_ops = {
3252         .open = hso_serial_open,
3253         .close = hso_serial_close,
3254         .write = hso_serial_write,
3255         .write_room = hso_serial_write_room,
3256         .ioctl = hso_serial_ioctl,
3257         .set_termios = hso_serial_set_termios,
3258         .chars_in_buffer = hso_serial_chars_in_buffer,
3259         .tiocmget = hso_serial_tiocmget,
3260         .tiocmset = hso_serial_tiocmset,
3261         .get_icount = hso_get_count,
3262         .unthrottle = hso_unthrottle
3263 };
3264
3265 static struct usb_driver hso_driver = {
3266         .name = driver_name,
3267         .probe = hso_probe,
3268         .disconnect = hso_disconnect,
3269         .id_table = hso_ids,
3270         .suspend = hso_suspend,
3271         .resume = hso_resume,
3272         .reset_resume = hso_resume,
3273         .supports_autosuspend = 1,
3274         .disable_hub_initiated_lpm = 1,
3275 };
3276
3277 static int __init hso_init(void)
3278 {
3279         int i;
3280         int result;
3281
3282         /* put it in the log */
3283         printk(KERN_INFO "hso: %s\n", version);
3284
3285         /* Initialise the serial table semaphore and table */
3286         spin_lock_init(&serial_table_lock);
3287         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3288                 serial_table[i] = NULL;
3289
3290         /* allocate our driver using the proper amount of supported minors */
3291         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3292         if (!tty_drv)
3293                 return -ENOMEM;
3294
3295         /* fill in all needed values */
3296         tty_drv->driver_name = driver_name;
3297         tty_drv->name = tty_filename;
3298
3299         /* if major number is provided as parameter, use that one */
3300         if (tty_major)
3301                 tty_drv->major = tty_major;
3302
3303         tty_drv->minor_start = 0;
3304         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3305         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3306         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3307         tty_drv->init_termios = tty_std_termios;
3308         hso_init_termios(&tty_drv->init_termios);
3309         tty_set_operations(tty_drv, &hso_serial_ops);
3310
3311         /* register the tty driver */
3312         result = tty_register_driver(tty_drv);
3313         if (result) {
3314                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3315                         __func__, result);
3316                 goto err_free_tty;
3317         }
3318
3319         /* register this module as an usb driver */
3320         result = usb_register(&hso_driver);
3321         if (result) {
3322                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3323                         result);
3324                 goto err_unreg_tty;
3325         }
3326
3327         /* done */
3328         return 0;
3329 err_unreg_tty:
3330         tty_unregister_driver(tty_drv);
3331 err_free_tty:
3332         put_tty_driver(tty_drv);
3333         return result;
3334 }
3335
3336 static void __exit hso_exit(void)
3337 {
3338         printk(KERN_INFO "hso: unloaded\n");
3339
3340         tty_unregister_driver(tty_drv);
3341         put_tty_driver(tty_drv);
3342         /* deregister the usb driver */
3343         usb_deregister(&hso_driver);
3344 }
3345
3346 /* Module definitions */
3347 module_init(hso_init);
3348 module_exit(hso_exit);
3349
3350 MODULE_AUTHOR(MOD_AUTHOR);
3351 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3352 MODULE_LICENSE(MOD_LICENSE);
3353
3354 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3355 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3356 module_param(debug, int, S_IRUGO | S_IWUSR);
3357
3358 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3359 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3360 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3361
3362 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3363 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3364 module_param(disable_net, int, S_IRUGO | S_IWUSR);