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