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hso: fix disable_net
[~shefty/rdma-dev.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2  *
3  * Driver for Option High Speed Mobile Devices.
4  *
5  *  Copyright (C) 2008 Option International
6  *                     Filip Aben <f.aben@option.com>
7  *                     Denis Joseph Barrow <d.barow@option.com>
8  *                     Jan Dumon <j.dumon@option.com>
9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10  *                      <ajb@spheresystems.co.uk>
11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12  *  Copyright (C) 2008 Novell, Inc.
13  *
14  *  This program is free software; you can redistribute it and/or modify
15  *  it under the terms of the GNU General Public License version 2 as
16  *  published by the Free Software Foundation.
17  *
18  *  This program is distributed in the hope that it will be useful,
19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  *  GNU General Public License for more details.
22  *
23  *  You should have received a copy of the GNU General Public License
24  *  along with this program; if not, write to the Free Software
25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
26  *  USA
27  *
28  *
29  *****************************************************************************/
30
31 /******************************************************************************
32  *
33  * Description of the device:
34  *
35  * Interface 0: Contains the IP network interface on the bulk end points.
36  *              The multiplexed serial ports are using the interrupt and
37  *              control endpoints.
38  *              Interrupt contains a bitmap telling which multiplexed
39  *              serialport needs servicing.
40  *
41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42  *              port is opened, as this have a huge impact on the network port
43  *              throughput.
44  *
45  * Interface 2: Standard modem interface - circuit switched interface, this
46  *              can be used to make a standard ppp connection however it
47  *              should not be used in conjunction with the IP network interface
48  *              enabled for USB performance reasons i.e. if using this set
49  *              ideally disable_net=1.
50  *
51  *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR                      "Option Wireless"
77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
78 #define MOD_LICENSE                     "GPL"
79
80 #define HSO_MAX_NET_DEVICES             10
81 #define HSO__MAX_MTU                    2048
82 #define DEFAULT_MTU                     1500
83 #define DEFAULT_MRU                     1500
84
85 #define CTRL_URB_RX_SIZE                1024
86 #define CTRL_URB_TX_SIZE                64
87
88 #define BULK_URB_RX_SIZE                4096
89 #define BULK_URB_TX_SIZE                8192
90
91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT           4
94 #define USB_TYPE_OPTION_VENDOR          0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING                 0
99
100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
101
102 #define HSO_SERIAL_MAGIC                0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS           256
106
107 #define MAX_RX_URBS                     2
108
109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
110 {
111         if (tty)
112                 return tty->driver_data;
113         return NULL;
114 }
115
116 /*****************************************************************************/
117 /* Debugging functions                                                       */
118 /*****************************************************************************/
119 #define D__(lvl_, fmt, arg...)                          \
120         do {                                            \
121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
122                        __LINE__, __func__, ## arg);     \
123         } while (0)
124
125 #define D_(lvl, args...)                                \
126         do {                                            \
127                 if (lvl & debug)                        \
128                         D__(KERN_INFO, args);           \
129         } while (0)
130
131 #define D1(args...)     D_(0x01, ##args)
132 #define D2(args...)     D_(0x02, ##args)
133 #define D3(args...)     D_(0x04, ##args)
134 #define D4(args...)     D_(0x08, ##args)
135 #define D5(args...)     D_(0x10, ##args)
136
137 /*****************************************************************************/
138 /* Enumerators                                                               */
139 /*****************************************************************************/
140 enum pkt_parse_state {
141         WAIT_IP,
142         WAIT_DATA,
143         WAIT_SYNC
144 };
145
146 /*****************************************************************************/
147 /* Structs                                                                   */
148 /*****************************************************************************/
149
150 struct hso_shared_int {
151         struct usb_endpoint_descriptor *intr_endp;
152         void *shared_intr_buf;
153         struct urb *shared_intr_urb;
154         struct usb_device *usb;
155         int use_count;
156         int ref_count;
157         struct mutex shared_int_lock;
158 };
159
160 struct hso_net {
161         struct hso_device *parent;
162         struct net_device *net;
163         struct rfkill *rfkill;
164
165         struct usb_endpoint_descriptor *in_endp;
166         struct usb_endpoint_descriptor *out_endp;
167
168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
169         struct urb *mux_bulk_tx_urb;
170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
171         void *mux_bulk_tx_buf;
172
173         struct sk_buff *skb_rx_buf;
174         struct sk_buff *skb_tx_buf;
175
176         enum pkt_parse_state rx_parse_state;
177         spinlock_t net_lock;
178
179         unsigned short rx_buf_size;
180         unsigned short rx_buf_missing;
181         struct iphdr rx_ip_hdr;
182
183         unsigned long flags;
184 };
185
186 enum rx_ctrl_state{
187         RX_IDLE,
188         RX_SENT,
189         RX_PENDING
190 };
191
192 #define BM_REQUEST_TYPE (0xa1)
193 #define B_NOTIFICATION  (0x20)
194 #define W_VALUE         (0x0)
195 #define W_INDEX         (0x2)
196 #define W_LENGTH        (0x2)
197
198 #define B_OVERRUN       (0x1<<6)
199 #define B_PARITY        (0x1<<5)
200 #define B_FRAMING       (0x1<<4)
201 #define B_RING_SIGNAL   (0x1<<3)
202 #define B_BREAK         (0x1<<2)
203 #define B_TX_CARRIER    (0x1<<1)
204 #define B_RX_CARRIER    (0x1<<0)
205
206 struct hso_serial_state_notification {
207         u8 bmRequestType;
208         u8 bNotification;
209         u16 wValue;
210         u16 wIndex;
211         u16 wLength;
212         u16 UART_state_bitmap;
213 } __packed;
214
215 struct hso_tiocmget {
216         struct mutex mutex;
217         wait_queue_head_t waitq;
218         int    intr_completed;
219         struct usb_endpoint_descriptor *endp;
220         struct urb *urb;
221         struct hso_serial_state_notification serial_state_notification;
222         u16    prev_UART_state_bitmap;
223         struct uart_icount icount;
224 };
225
226
227 struct hso_serial {
228         struct hso_device *parent;
229         int magic;
230         u8 minor;
231
232         struct hso_shared_int *shared_int;
233
234         /* rx/tx urb could be either a bulk urb or a control urb depending
235            on which serial port it is used on. */
236         struct urb *rx_urb[MAX_RX_URBS];
237         u8 num_rx_urbs;
238         u8 *rx_data[MAX_RX_URBS];
239         u16 rx_data_length;     /* should contain allocated length */
240
241         struct urb *tx_urb;
242         u8 *tx_data;
243         u8 *tx_buffer;
244         u16 tx_data_length;     /* should contain allocated length */
245         u16 tx_data_count;
246         u16 tx_buffer_count;
247         struct usb_ctrlrequest ctrl_req_tx;
248         struct usb_ctrlrequest ctrl_req_rx;
249
250         struct usb_endpoint_descriptor *in_endp;
251         struct usb_endpoint_descriptor *out_endp;
252
253         enum rx_ctrl_state rx_state;
254         u8 rts_state;
255         u8 dtr_state;
256         unsigned tx_urb_used:1;
257
258         /* from usb_serial_port */
259         struct tty_struct *tty;
260         int open_count;
261         spinlock_t serial_lock;
262
263         int (*write_data) (struct hso_serial *serial);
264         struct hso_tiocmget  *tiocmget;
265         /* Hacks required to get flow control
266          * working on the serial receive buffers
267          * so as not to drop characters on the floor.
268          */
269         int  curr_rx_urb_idx;
270         u16  curr_rx_urb_offset;
271         u8   rx_urb_filled[MAX_RX_URBS];
272         struct tasklet_struct unthrottle_tasklet;
273         struct work_struct    retry_unthrottle_workqueue;
274 };
275
276 struct hso_device {
277         union {
278                 struct hso_serial *dev_serial;
279                 struct hso_net *dev_net;
280         } port_data;
281
282         u32 port_spec;
283
284         u8 is_active;
285         u8 usb_gone;
286         struct work_struct async_get_intf;
287         struct work_struct async_put_intf;
288         struct work_struct reset_device;
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 handle_usb_error(int status, const char *function,
336                              struct hso_device *hso_dev);
337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
338                                                   int type, int dir);
339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
340 static void hso_free_interface(struct usb_interface *intf);
341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
342 static int hso_stop_serial_device(struct hso_device *hso_dev);
343 static int hso_start_net_device(struct hso_device *hso_dev);
344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
345 static int hso_stop_net_device(struct hso_device *hso_dev);
346 static void hso_serial_ref_free(struct kref *ref);
347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
348 static int hso_mux_serial_read(struct hso_serial *serial);
349 static void async_get_intf(struct work_struct *data);
350 static void async_put_intf(struct work_struct *data);
351 static int hso_put_activity(struct hso_device *hso_dev);
352 static int hso_get_activity(struct hso_device *hso_dev);
353 static void tiocmget_intr_callback(struct urb *urb);
354 static void reset_device(struct work_struct *data);
355 /*****************************************************************************/
356 /* Helping functions                                                         */
357 /*****************************************************************************/
358
359 /* #define DEBUG */
360
361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
362 {
363         return hso_dev->port_data.dev_net;
364 }
365
366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
367 {
368         return hso_dev->port_data.dev_serial;
369 }
370
371 /* Debugging functions */
372 #ifdef DEBUG
373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
374                      unsigned int len)
375 {
376         static char name[255];
377
378         sprintf(name, "hso[%d:%s]", line_count, func_name);
379         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
380 }
381
382 #define DUMP(buf_, len_)        \
383         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
384
385 #define DUMP1(buf_, len_)                       \
386         do {                                    \
387                 if (0x01 & debug)               \
388                         DUMP(buf_, len_);       \
389         } while (0)
390 #else
391 #define DUMP(buf_, len_)
392 #define DUMP1(buf_, len_)
393 #endif
394
395 /* module parameters */
396 static int debug;
397 static int tty_major;
398 static int disable_net;
399
400 /* driver info */
401 static const char driver_name[] = "hso";
402 static const char tty_filename[] = "ttyHS";
403 static const char *version = __FILE__ ": " MOD_AUTHOR;
404 /* the usb driver itself (registered in hso_init) */
405 static struct usb_driver hso_driver;
406 /* serial structures */
407 static struct tty_driver *tty_drv;
408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
410 static spinlock_t serial_table_lock;
411
412 static const s32 default_port_spec[] = {
413         HSO_INTF_MUX | HSO_PORT_NETWORK,
414         HSO_INTF_BULK | HSO_PORT_DIAG,
415         HSO_INTF_BULK | HSO_PORT_MODEM,
416         0
417 };
418
419 static const s32 icon321_port_spec[] = {
420         HSO_INTF_MUX | HSO_PORT_NETWORK,
421         HSO_INTF_BULK | HSO_PORT_DIAG2,
422         HSO_INTF_BULK | HSO_PORT_MODEM,
423         HSO_INTF_BULK | HSO_PORT_DIAG,
424         0
425 };
426
427 #define default_port_device(vendor, product)    \
428         USB_DEVICE(vendor, product),    \
429                 .driver_info = (kernel_ulong_t)default_port_spec
430
431 #define icon321_port_device(vendor, product)    \
432         USB_DEVICE(vendor, product),    \
433                 .driver_info = (kernel_ulong_t)icon321_port_spec
434
435 /* list of devices we support */
436 static const struct usb_device_id hso_ids[] = {
437         {default_port_device(0x0af0, 0x6711)},
438         {default_port_device(0x0af0, 0x6731)},
439         {default_port_device(0x0af0, 0x6751)},
440         {default_port_device(0x0af0, 0x6771)},
441         {default_port_device(0x0af0, 0x6791)},
442         {default_port_device(0x0af0, 0x6811)},
443         {default_port_device(0x0af0, 0x6911)},
444         {default_port_device(0x0af0, 0x6951)},
445         {default_port_device(0x0af0, 0x6971)},
446         {default_port_device(0x0af0, 0x7011)},
447         {default_port_device(0x0af0, 0x7031)},
448         {default_port_device(0x0af0, 0x7051)},
449         {default_port_device(0x0af0, 0x7071)},
450         {default_port_device(0x0af0, 0x7111)},
451         {default_port_device(0x0af0, 0x7211)},
452         {default_port_device(0x0af0, 0x7251)},
453         {default_port_device(0x0af0, 0x7271)},
454         {default_port_device(0x0af0, 0x7311)},
455         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
456         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
457         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
458         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
459         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
460         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
461         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
462         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
463         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
464         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
465         {USB_DEVICE(0x0af0, 0x7701)},
466         {USB_DEVICE(0x0af0, 0x7706)},
467         {USB_DEVICE(0x0af0, 0x7801)},
468         {USB_DEVICE(0x0af0, 0x7901)},
469         {USB_DEVICE(0x0af0, 0x7A01)},
470         {USB_DEVICE(0x0af0, 0x7A05)},
471         {USB_DEVICE(0x0af0, 0x8200)},
472         {USB_DEVICE(0x0af0, 0x8201)},
473         {USB_DEVICE(0x0af0, 0x8300)},
474         {USB_DEVICE(0x0af0, 0x8302)},
475         {USB_DEVICE(0x0af0, 0x8304)},
476         {USB_DEVICE(0x0af0, 0x8400)},
477         {USB_DEVICE(0x0af0, 0x8600)},
478         {USB_DEVICE(0x0af0, 0x8800)},
479         {USB_DEVICE(0x0af0, 0x8900)},
480         {USB_DEVICE(0x0af0, 0x9000)},
481         {USB_DEVICE(0x0af0, 0xd035)},
482         {USB_DEVICE(0x0af0, 0xd055)},
483         {USB_DEVICE(0x0af0, 0xd155)},
484         {USB_DEVICE(0x0af0, 0xd255)},
485         {USB_DEVICE(0x0af0, 0xd057)},
486         {USB_DEVICE(0x0af0, 0xd157)},
487         {USB_DEVICE(0x0af0, 0xd257)},
488         {USB_DEVICE(0x0af0, 0xd357)},
489         {USB_DEVICE(0x0af0, 0xd058)},
490         {USB_DEVICE(0x0af0, 0xc100)},
491         {}
492 };
493 MODULE_DEVICE_TABLE(usb, hso_ids);
494
495 /* Sysfs attribute */
496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
497                                        struct device_attribute *attr,
498                                        char *buf)
499 {
500         struct hso_device *hso_dev = dev_get_drvdata(dev);
501         char *port_name;
502
503         if (!hso_dev)
504                 return 0;
505
506         switch (hso_dev->port_spec & HSO_PORT_MASK) {
507         case HSO_PORT_CONTROL:
508                 port_name = "Control";
509                 break;
510         case HSO_PORT_APP:
511                 port_name = "Application";
512                 break;
513         case HSO_PORT_APP2:
514                 port_name = "Application2";
515                 break;
516         case HSO_PORT_GPS:
517                 port_name = "GPS";
518                 break;
519         case HSO_PORT_GPS_CONTROL:
520                 port_name = "GPS Control";
521                 break;
522         case HSO_PORT_PCSC:
523                 port_name = "PCSC";
524                 break;
525         case HSO_PORT_DIAG:
526                 port_name = "Diagnostic";
527                 break;
528         case HSO_PORT_DIAG2:
529                 port_name = "Diagnostic2";
530                 break;
531         case HSO_PORT_MODEM:
532                 port_name = "Modem";
533                 break;
534         case HSO_PORT_NETWORK:
535                 port_name = "Network";
536                 break;
537         default:
538                 port_name = "Unknown";
539                 break;
540         }
541
542         return sprintf(buf, "%s\n", port_name);
543 }
544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
545
546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
547 {
548         int idx;
549
550         for (idx = 0; idx < serial->num_rx_urbs; idx++)
551                 if (serial->rx_urb[idx] == urb)
552                         return idx;
553         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
554         return -1;
555 }
556
557 /* converts mux value to a port spec value */
558 static u32 hso_mux_to_port(int mux)
559 {
560         u32 result;
561
562         switch (mux) {
563         case 0x1:
564                 result = HSO_PORT_CONTROL;
565                 break;
566         case 0x2:
567                 result = HSO_PORT_APP;
568                 break;
569         case 0x4:
570                 result = HSO_PORT_PCSC;
571                 break;
572         case 0x8:
573                 result = HSO_PORT_GPS;
574                 break;
575         case 0x10:
576                 result = HSO_PORT_APP2;
577                 break;
578         default:
579                 result = HSO_PORT_NO_PORT;
580         }
581         return result;
582 }
583
584 /* converts port spec value to a mux value */
585 static u32 hso_port_to_mux(int port)
586 {
587         u32 result;
588
589         switch (port & HSO_PORT_MASK) {
590         case HSO_PORT_CONTROL:
591                 result = 0x0;
592                 break;
593         case HSO_PORT_APP:
594                 result = 0x1;
595                 break;
596         case HSO_PORT_PCSC:
597                 result = 0x2;
598                 break;
599         case HSO_PORT_GPS:
600                 result = 0x3;
601                 break;
602         case HSO_PORT_APP2:
603                 result = 0x4;
604                 break;
605         default:
606                 result = 0x0;
607         }
608         return result;
609 }
610
611 static struct hso_serial *get_serial_by_shared_int_and_type(
612                                         struct hso_shared_int *shared_int,
613                                         int mux)
614 {
615         int i, port;
616
617         port = hso_mux_to_port(mux);
618
619         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
620                 if (serial_table[i] &&
621                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
622                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
623                         return dev2ser(serial_table[i]);
624                 }
625         }
626
627         return NULL;
628 }
629
630 static struct hso_serial *get_serial_by_index(unsigned index)
631 {
632         struct hso_serial *serial = NULL;
633         unsigned long flags;
634
635         spin_lock_irqsave(&serial_table_lock, flags);
636         if (serial_table[index])
637                 serial = dev2ser(serial_table[index]);
638         spin_unlock_irqrestore(&serial_table_lock, flags);
639
640         return serial;
641 }
642
643 static int get_free_serial_index(void)
644 {
645         int index;
646         unsigned long flags;
647
648         spin_lock_irqsave(&serial_table_lock, flags);
649         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
650                 if (serial_table[index] == NULL) {
651                         spin_unlock_irqrestore(&serial_table_lock, flags);
652                         return index;
653                 }
654         }
655         spin_unlock_irqrestore(&serial_table_lock, flags);
656
657         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
658         return -1;
659 }
660
661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
662 {
663         unsigned long flags;
664
665         spin_lock_irqsave(&serial_table_lock, flags);
666         if (serial)
667                 serial_table[index] = serial->parent;
668         else
669                 serial_table[index] = NULL;
670         spin_unlock_irqrestore(&serial_table_lock, flags);
671 }
672
673 static void handle_usb_error(int status, const char *function,
674                              struct hso_device *hso_dev)
675 {
676         char *explanation;
677
678         switch (status) {
679         case -ENODEV:
680                 explanation = "no device";
681                 break;
682         case -ENOENT:
683                 explanation = "endpoint not enabled";
684                 break;
685         case -EPIPE:
686                 explanation = "endpoint stalled";
687                 break;
688         case -ENOSPC:
689                 explanation = "not enough bandwidth";
690                 break;
691         case -ESHUTDOWN:
692                 explanation = "device disabled";
693                 break;
694         case -EHOSTUNREACH:
695                 explanation = "device suspended";
696                 break;
697         case -EINVAL:
698         case -EAGAIN:
699         case -EFBIG:
700         case -EMSGSIZE:
701                 explanation = "internal error";
702                 break;
703         case -EILSEQ:
704         case -EPROTO:
705         case -ETIME:
706         case -ETIMEDOUT:
707                 explanation = "protocol error";
708                 if (hso_dev)
709                         schedule_work(&hso_dev->reset_device);
710                 break;
711         default:
712                 explanation = "unknown status";
713                 break;
714         }
715
716         /* log a meaningful explanation of an USB status */
717         D1("%s: received USB status - %s (%d)", function, explanation, status);
718 }
719
720 /* Network interface functions */
721
722 /* called when net interface is brought up by ifconfig */
723 static int hso_net_open(struct net_device *net)
724 {
725         struct hso_net *odev = netdev_priv(net);
726         unsigned long flags = 0;
727
728         if (!odev) {
729                 dev_err(&net->dev, "No net device !\n");
730                 return -ENODEV;
731         }
732
733         odev->skb_tx_buf = NULL;
734
735         /* setup environment */
736         spin_lock_irqsave(&odev->net_lock, flags);
737         odev->rx_parse_state = WAIT_IP;
738         odev->rx_buf_size = 0;
739         odev->rx_buf_missing = sizeof(struct iphdr);
740         spin_unlock_irqrestore(&odev->net_lock, flags);
741
742         /* We are up and running. */
743         set_bit(HSO_NET_RUNNING, &odev->flags);
744         hso_start_net_device(odev->parent);
745
746         /* Tell the kernel we are ready to start receiving from it */
747         netif_start_queue(net);
748
749         return 0;
750 }
751
752 /* called when interface is brought down by ifconfig */
753 static int hso_net_close(struct net_device *net)
754 {
755         struct hso_net *odev = netdev_priv(net);
756
757         /* we don't need the queue anymore */
758         netif_stop_queue(net);
759         /* no longer running */
760         clear_bit(HSO_NET_RUNNING, &odev->flags);
761
762         hso_stop_net_device(odev->parent);
763
764         /* done */
765         return 0;
766 }
767
768 /* USB tells is xmit done, we should start the netqueue again */
769 static void write_bulk_callback(struct urb *urb)
770 {
771         struct hso_net *odev = urb->context;
772         int status = urb->status;
773
774         /* Sanity check */
775         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
776                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
777                 return;
778         }
779
780         /* Do we still have a valid kernel network device? */
781         if (!netif_device_present(odev->net)) {
782                 dev_err(&urb->dev->dev, "%s: net device not present\n",
783                         __func__);
784                 return;
785         }
786
787         /* log status, but don't act on it, we don't need to resubmit anything
788          * anyhow */
789         if (status)
790                 handle_usb_error(status, __func__, odev->parent);
791
792         hso_put_activity(odev->parent);
793
794         /* Tell the network interface we are ready for another frame */
795         netif_wake_queue(odev->net);
796 }
797
798 /* called by kernel when we need to transmit a packet */
799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
800                                             struct net_device *net)
801 {
802         struct hso_net *odev = netdev_priv(net);
803         int result;
804
805         /* Tell the kernel, "No more frames 'til we are done with this one." */
806         netif_stop_queue(net);
807         if (hso_get_activity(odev->parent) == -EAGAIN) {
808                 odev->skb_tx_buf = skb;
809                 return NETDEV_TX_OK;
810         }
811
812         /* log if asked */
813         DUMP1(skb->data, skb->len);
814         /* Copy it from kernel memory to OUR memory */
815         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
816         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
817
818         /* Fill in the URB for shipping it out. */
819         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
820                           odev->parent->usb,
821                           usb_sndbulkpipe(odev->parent->usb,
822                                           odev->out_endp->
823                                           bEndpointAddress & 0x7F),
824                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
825                           odev);
826
827         /* Deal with the Zero Length packet problem, I hope */
828         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
829
830         /* Send the URB on its merry way. */
831         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
832         if (result) {
833                 dev_warn(&odev->parent->interface->dev,
834                         "failed mux_bulk_tx_urb %d\n", result);
835                 net->stats.tx_errors++;
836                 netif_start_queue(net);
837         } else {
838                 net->stats.tx_packets++;
839                 net->stats.tx_bytes += skb->len;
840         }
841         dev_kfree_skb(skb);
842         /* we're done */
843         return NETDEV_TX_OK;
844 }
845
846 static const struct ethtool_ops ops = {
847         .get_link = ethtool_op_get_link
848 };
849
850 /* called when a packet did not ack after watchdogtimeout */
851 static void hso_net_tx_timeout(struct net_device *net)
852 {
853         struct hso_net *odev = netdev_priv(net);
854
855         if (!odev)
856                 return;
857
858         /* Tell syslog we are hosed. */
859         dev_warn(&net->dev, "Tx timed out.\n");
860
861         /* Tear the waiting frame off the list */
862         if (odev->mux_bulk_tx_urb &&
863             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
864                 usb_unlink_urb(odev->mux_bulk_tx_urb);
865
866         /* Update statistics */
867         net->stats.tx_errors++;
868 }
869
870 /* make a real packet from the received USB buffer */
871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
872                         unsigned int count, unsigned char is_eop)
873 {
874         unsigned short temp_bytes;
875         unsigned short buffer_offset = 0;
876         unsigned short frame_len;
877         unsigned char *tmp_rx_buf;
878
879         /* log if needed */
880         D1("Rx %d bytes", count);
881         DUMP(ip_pkt, min(128, (int)count));
882
883         while (count) {
884                 switch (odev->rx_parse_state) {
885                 case WAIT_IP:
886                         /* waiting for IP header. */
887                         /* wanted bytes - size of ip header */
888                         temp_bytes =
889                             (count <
890                              odev->rx_buf_missing) ? count : odev->
891                             rx_buf_missing;
892
893                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
894                                odev->rx_buf_size, ip_pkt + buffer_offset,
895                                temp_bytes);
896
897                         odev->rx_buf_size += temp_bytes;
898                         buffer_offset += temp_bytes;
899                         odev->rx_buf_missing -= temp_bytes;
900                         count -= temp_bytes;
901
902                         if (!odev->rx_buf_missing) {
903                                 /* header is complete allocate an sk_buffer and
904                                  * continue to WAIT_DATA */
905                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
906
907                                 if ((frame_len > DEFAULT_MRU) ||
908                                     (frame_len < sizeof(struct iphdr))) {
909                                         dev_err(&odev->net->dev,
910                                                 "Invalid frame (%d) length\n",
911                                                 frame_len);
912                                         odev->rx_parse_state = WAIT_SYNC;
913                                         continue;
914                                 }
915                                 /* Allocate an sk_buff */
916                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
917                                                                     frame_len);
918                                 if (!odev->skb_rx_buf) {
919                                         /* We got no receive buffer. */
920                                         D1("could not allocate memory");
921                                         odev->rx_parse_state = WAIT_SYNC;
922                                         return;
923                                 }
924
925                                 /* Copy what we got so far. make room for iphdr
926                                  * after tail. */
927                                 tmp_rx_buf =
928                                     skb_put(odev->skb_rx_buf,
929                                             sizeof(struct iphdr));
930                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
931                                        sizeof(struct iphdr));
932
933                                 /* ETH_HLEN */
934                                 odev->rx_buf_size = sizeof(struct iphdr);
935
936                                 /* Filip actually use .tot_len */
937                                 odev->rx_buf_missing =
938                                     frame_len - sizeof(struct iphdr);
939                                 odev->rx_parse_state = WAIT_DATA;
940                         }
941                         break;
942
943                 case WAIT_DATA:
944                         temp_bytes = (count < odev->rx_buf_missing)
945                                         ? count : odev->rx_buf_missing;
946
947                         /* Copy the rest of the bytes that are left in the
948                          * buffer into the waiting sk_buf. */
949                         /* Make room for temp_bytes after tail. */
950                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
951                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
952
953                         odev->rx_buf_missing -= temp_bytes;
954                         count -= temp_bytes;
955                         buffer_offset += temp_bytes;
956                         odev->rx_buf_size += temp_bytes;
957                         if (!odev->rx_buf_missing) {
958                                 /* Packet is complete. Inject into stack. */
959                                 /* We have IP packet here */
960                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
961                                 /* don't check it */
962                                 odev->skb_rx_buf->ip_summed =
963                                         CHECKSUM_UNNECESSARY;
964
965                                 skb_reset_mac_header(odev->skb_rx_buf);
966
967                                 /* Ship it off to the kernel */
968                                 netif_rx(odev->skb_rx_buf);
969                                 /* No longer our buffer. */
970                                 odev->skb_rx_buf = NULL;
971
972                                 /* update out statistics */
973                                 odev->net->stats.rx_packets++;
974
975                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
976
977                                 odev->rx_buf_size = 0;
978                                 odev->rx_buf_missing = sizeof(struct iphdr);
979                                 odev->rx_parse_state = WAIT_IP;
980                         }
981                         break;
982
983                 case WAIT_SYNC:
984                         D1(" W_S");
985                         count = 0;
986                         break;
987                 default:
988                         D1(" ");
989                         count--;
990                         break;
991                 }
992         }
993
994         /* Recovery mechanism for WAIT_SYNC state. */
995         if (is_eop) {
996                 if (odev->rx_parse_state == WAIT_SYNC) {
997                         odev->rx_parse_state = WAIT_IP;
998                         odev->rx_buf_size = 0;
999                         odev->rx_buf_missing = sizeof(struct iphdr);
1000                 }
1001         }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007         struct hso_net *odev = urb->context;
1008         struct net_device *net;
1009         int result;
1010         int status = urb->status;
1011
1012         /* is al ok?  (Filip: Who's Al ?) */
1013         if (status) {
1014                 handle_usb_error(status, __func__, odev->parent);
1015                 return;
1016         }
1017
1018         /* Sanity check */
1019         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020                 D1("BULK IN callback but driver is not active!");
1021                 return;
1022         }
1023         usb_mark_last_busy(urb->dev);
1024
1025         net = odev->net;
1026
1027         if (!netif_device_present(net)) {
1028                 /* Somebody killed our network interface... */
1029                 return;
1030         }
1031
1032         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1033                 u32 rest;
1034                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1035                 rest = urb->actual_length %
1036                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1037                 if (((rest == 5) || (rest == 6)) &&
1038                     !memcmp(((u8 *) urb->transfer_buffer) +
1039                             urb->actual_length - 4, crc_check, 4)) {
1040                         urb->actual_length -= 4;
1041                 }
1042         }
1043
1044         /* do we even have a packet? */
1045         if (urb->actual_length) {
1046                 /* Handle the IP stream, add header and push it onto network
1047                  * stack if the packet is complete. */
1048                 spin_lock(&odev->net_lock);
1049                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1050                             (urb->transfer_buffer_length >
1051                              urb->actual_length) ? 1 : 0);
1052                 spin_unlock(&odev->net_lock);
1053         }
1054
1055         /* We are done with this URB, resubmit it. Prep the USB to wait for
1056          * another frame. Reuse same as received. */
1057         usb_fill_bulk_urb(urb,
1058                           odev->parent->usb,
1059                           usb_rcvbulkpipe(odev->parent->usb,
1060                                           odev->in_endp->
1061                                           bEndpointAddress & 0x7F),
1062                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1063                           read_bulk_callback, odev);
1064
1065         /* Give this to the USB subsystem so it can tell us when more data
1066          * arrives. */
1067         result = usb_submit_urb(urb, GFP_ATOMIC);
1068         if (result)
1069                 dev_warn(&odev->parent->interface->dev,
1070                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1071                          result);
1072 }
1073
1074 /* Serial driver functions */
1075
1076 static void hso_init_termios(struct ktermios *termios)
1077 {
1078         /*
1079          * The default requirements for this device are:
1080          */
1081         termios->c_iflag &=
1082                 ~(IGNBRK        /* disable ignore break */
1083                 | BRKINT        /* disable break causes interrupt */
1084                 | PARMRK        /* disable mark parity errors */
1085                 | ISTRIP        /* disable clear high bit of input characters */
1086                 | INLCR         /* disable translate NL to CR */
1087                 | IGNCR         /* disable ignore CR */
1088                 | ICRNL         /* disable translate CR to NL */
1089                 | IXON);        /* disable enable XON/XOFF flow control */
1090
1091         /* disable postprocess output characters */
1092         termios->c_oflag &= ~OPOST;
1093
1094         termios->c_lflag &=
1095                 ~(ECHO          /* disable echo input characters */
1096                 | ECHONL        /* disable echo new line */
1097                 | ICANON        /* disable erase, kill, werase, and rprnt
1098                                    special characters */
1099                 | ISIG          /* disable interrupt, quit, and suspend special
1100                                    characters */
1101                 | IEXTEN);      /* disable non-POSIX special characters */
1102
1103         termios->c_cflag &=
1104                 ~(CSIZE         /* no size */
1105                 | PARENB        /* disable parity bit */
1106                 | CBAUD         /* clear current baud rate */
1107                 | CBAUDEX);     /* clear current buad rate */
1108
1109         termios->c_cflag |= CS8;        /* character size 8 bits */
1110
1111         /* baud rate 115200 */
1112         tty_termios_encode_baud_rate(termios, 115200, 115200);
1113 }
1114
1115 static void _hso_serial_set_termios(struct tty_struct *tty,
1116                                     struct ktermios *old)
1117 {
1118         struct hso_serial *serial = get_serial_by_tty(tty);
1119         struct ktermios *termios;
1120
1121         if (!serial) {
1122                 printk(KERN_ERR "%s: no tty structures", __func__);
1123                 return;
1124         }
1125
1126         D4("port %d", serial->minor);
1127
1128         /*
1129          *      Fix up unsupported bits
1130          */
1131         termios = tty->termios;
1132         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1133
1134         termios->c_cflag &=
1135                 ~(CSIZE         /* no size */
1136                 | PARENB        /* disable parity bit */
1137                 | CBAUD         /* clear current baud rate */
1138                 | CBAUDEX);     /* clear current buad rate */
1139
1140         termios->c_cflag |= CS8;        /* character size 8 bits */
1141
1142         /* baud rate 115200 */
1143         tty_encode_baud_rate(tty, 115200, 115200);
1144 }
1145
1146 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1147 {
1148         int result;
1149         /* We are done with this URB, resubmit it. Prep the USB to wait for
1150          * another frame */
1151         usb_fill_bulk_urb(urb, serial->parent->usb,
1152                           usb_rcvbulkpipe(serial->parent->usb,
1153                                           serial->in_endp->
1154                                           bEndpointAddress & 0x7F),
1155                           urb->transfer_buffer, serial->rx_data_length,
1156                           hso_std_serial_read_bulk_callback, serial);
1157         /* Give this to the USB subsystem so it can tell us when more data
1158          * arrives. */
1159         result = usb_submit_urb(urb, GFP_ATOMIC);
1160         if (result) {
1161                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1162                         __func__, result);
1163         }
1164 }
1165
1166
1167
1168
1169 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1170 {
1171         int count;
1172         struct urb *curr_urb;
1173
1174         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1175                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1176                 count = put_rxbuf_data(curr_urb, serial);
1177                 if (count == -1)
1178                         return;
1179                 if (count == 0) {
1180                         serial->curr_rx_urb_idx++;
1181                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1182                                 serial->curr_rx_urb_idx = 0;
1183                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1184                 }
1185         }
1186 }
1187
1188 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1189 {
1190         int count = 0;
1191         struct urb *urb;
1192
1193         urb = serial->rx_urb[0];
1194         if (serial->open_count > 0) {
1195                 count = put_rxbuf_data(urb, serial);
1196                 if (count == -1)
1197                         return;
1198         }
1199         /* Re issue a read as long as we receive data. */
1200
1201         if (count == 0 && ((urb->actual_length != 0) ||
1202                            (serial->rx_state == RX_PENDING))) {
1203                 serial->rx_state = RX_SENT;
1204                 hso_mux_serial_read(serial);
1205         } else
1206                 serial->rx_state = RX_IDLE;
1207 }
1208
1209
1210 /* read callback for Diag and CS port */
1211 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1212 {
1213         struct hso_serial *serial = urb->context;
1214         int status = urb->status;
1215
1216         /* sanity check */
1217         if (!serial) {
1218                 D1("serial == NULL");
1219                 return;
1220         } else if (status) {
1221                 handle_usb_error(status, __func__, serial->parent);
1222                 return;
1223         }
1224
1225         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1226         D1("Actual length = %d\n", urb->actual_length);
1227         DUMP1(urb->transfer_buffer, urb->actual_length);
1228
1229         /* Anyone listening? */
1230         if (serial->open_count == 0)
1231                 return;
1232
1233         if (status == 0) {
1234                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1235                         u32 rest;
1236                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1237                         rest =
1238                             urb->actual_length %
1239                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1240                         if (((rest == 5) || (rest == 6)) &&
1241                             !memcmp(((u8 *) urb->transfer_buffer) +
1242                                     urb->actual_length - 4, crc_check, 4)) {
1243                                 urb->actual_length -= 4;
1244                         }
1245                 }
1246                 /* Valid data, handle RX data */
1247                 spin_lock(&serial->serial_lock);
1248                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1249                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1250                 spin_unlock(&serial->serial_lock);
1251         } else if (status == -ENOENT || status == -ECONNRESET) {
1252                 /* Unlinked - check for throttled port. */
1253                 D2("Port %d, successfully unlinked urb", serial->minor);
1254                 spin_lock(&serial->serial_lock);
1255                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1256                 hso_resubmit_rx_bulk_urb(serial, urb);
1257                 spin_unlock(&serial->serial_lock);
1258         } else {
1259                 D2("Port %d, status = %d for read urb", serial->minor, status);
1260                 return;
1261         }
1262 }
1263
1264 /*
1265  * This needs to be a tasklet otherwise we will
1266  * end up recursively calling this function.
1267  */
1268 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1269 {
1270         unsigned long flags;
1271
1272         spin_lock_irqsave(&serial->serial_lock, flags);
1273         if ((serial->parent->port_spec & HSO_INTF_MUX))
1274                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1275         else
1276                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1277         spin_unlock_irqrestore(&serial->serial_lock, flags);
1278 }
1279
1280 static  void hso_unthrottle(struct tty_struct *tty)
1281 {
1282         struct hso_serial *serial = get_serial_by_tty(tty);
1283
1284         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1285 }
1286
1287 static void hso_unthrottle_workfunc(struct work_struct *work)
1288 {
1289         struct hso_serial *serial =
1290             container_of(work, struct hso_serial,
1291                          retry_unthrottle_workqueue);
1292         hso_unthrottle_tasklet(serial);
1293 }
1294
1295 /* open the requested serial port */
1296 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1297 {
1298         struct hso_serial *serial = get_serial_by_index(tty->index);
1299         int result;
1300
1301         /* sanity check */
1302         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1303                 WARN_ON(1);
1304                 tty->driver_data = NULL;
1305                 D1("Failed to open port");
1306                 return -ENODEV;
1307         }
1308
1309         mutex_lock(&serial->parent->mutex);
1310         result = usb_autopm_get_interface(serial->parent->interface);
1311         if (result < 0)
1312                 goto err_out;
1313
1314         D1("Opening %d", serial->minor);
1315         kref_get(&serial->parent->ref);
1316
1317         /* setup */
1318         spin_lock_irq(&serial->serial_lock);
1319         tty->driver_data = serial;
1320         tty_kref_put(serial->tty);
1321         serial->tty = tty_kref_get(tty);
1322         spin_unlock_irq(&serial->serial_lock);
1323
1324         /* check for port already opened, if not set the termios */
1325         serial->open_count++;
1326         if (serial->open_count == 1) {
1327                 serial->rx_state = RX_IDLE;
1328                 /* Force default termio settings */
1329                 _hso_serial_set_termios(tty, NULL);
1330                 tasklet_init(&serial->unthrottle_tasklet,
1331                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1332                              (unsigned long)serial);
1333                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1334                           hso_unthrottle_workfunc);
1335                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1336                 if (result) {
1337                         hso_stop_serial_device(serial->parent);
1338                         serial->open_count--;
1339                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1340                 }
1341         } else {
1342                 D1("Port was already open");
1343         }
1344
1345         usb_autopm_put_interface(serial->parent->interface);
1346
1347         /* done */
1348         if (result)
1349                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1350 err_out:
1351         mutex_unlock(&serial->parent->mutex);
1352         return result;
1353 }
1354
1355 /* close the requested serial port */
1356 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1357 {
1358         struct hso_serial *serial = tty->driver_data;
1359         u8 usb_gone;
1360
1361         D1("Closing serial port");
1362
1363         /* Open failed, no close cleanup required */
1364         if (serial == NULL)
1365                 return;
1366
1367         mutex_lock(&serial->parent->mutex);
1368         usb_gone = serial->parent->usb_gone;
1369
1370         if (!usb_gone)
1371                 usb_autopm_get_interface(serial->parent->interface);
1372
1373         /* reset the rts and dtr */
1374         /* do the actual close */
1375         serial->open_count--;
1376
1377         if (serial->open_count <= 0) {
1378                 serial->open_count = 0;
1379                 spin_lock_irq(&serial->serial_lock);
1380                 if (serial->tty == tty) {
1381                         serial->tty->driver_data = NULL;
1382                         serial->tty = NULL;
1383                         tty_kref_put(tty);
1384                 }
1385                 spin_unlock_irq(&serial->serial_lock);
1386                 if (!usb_gone)
1387                         hso_stop_serial_device(serial->parent);
1388                 tasklet_kill(&serial->unthrottle_tasklet);
1389                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1390         }
1391
1392         if (!usb_gone)
1393                 usb_autopm_put_interface(serial->parent->interface);
1394
1395         mutex_unlock(&serial->parent->mutex);
1396
1397         kref_put(&serial->parent->ref, hso_serial_ref_free);
1398 }
1399
1400 /* close the requested serial port */
1401 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1402                             int count)
1403 {
1404         struct hso_serial *serial = get_serial_by_tty(tty);
1405         int space, tx_bytes;
1406         unsigned long flags;
1407
1408         /* sanity check */
1409         if (serial == NULL) {
1410                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1411                 return -ENODEV;
1412         }
1413
1414         spin_lock_irqsave(&serial->serial_lock, flags);
1415
1416         space = serial->tx_data_length - serial->tx_buffer_count;
1417         tx_bytes = (count < space) ? count : space;
1418
1419         if (!tx_bytes)
1420                 goto out;
1421
1422         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1423         serial->tx_buffer_count += tx_bytes;
1424
1425 out:
1426         spin_unlock_irqrestore(&serial->serial_lock, flags);
1427
1428         hso_kick_transmit(serial);
1429         /* done */
1430         return tx_bytes;
1431 }
1432
1433 /* how much room is there for writing */
1434 static int hso_serial_write_room(struct tty_struct *tty)
1435 {
1436         struct hso_serial *serial = get_serial_by_tty(tty);
1437         int room;
1438         unsigned long flags;
1439
1440         spin_lock_irqsave(&serial->serial_lock, flags);
1441         room = serial->tx_data_length - serial->tx_buffer_count;
1442         spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444         /* return free room */
1445         return room;
1446 }
1447
1448 /* setup the term */
1449 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1450 {
1451         struct hso_serial *serial = get_serial_by_tty(tty);
1452         unsigned long flags;
1453
1454         if (old)
1455                 D5("Termios called with: cflags new[%d] - old[%d]",
1456                    tty->termios->c_cflag, old->c_cflag);
1457
1458         /* the actual setup */
1459         spin_lock_irqsave(&serial->serial_lock, flags);
1460         if (serial->open_count)
1461                 _hso_serial_set_termios(tty, old);
1462         else
1463                 tty->termios = old;
1464         spin_unlock_irqrestore(&serial->serial_lock, flags);
1465
1466         /* done */
1467 }
1468
1469 /* how many characters in the buffer */
1470 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1471 {
1472         struct hso_serial *serial = get_serial_by_tty(tty);
1473         int chars;
1474         unsigned long flags;
1475
1476         /* sanity check */
1477         if (serial == NULL)
1478                 return 0;
1479
1480         spin_lock_irqsave(&serial->serial_lock, flags);
1481         chars = serial->tx_buffer_count;
1482         spin_unlock_irqrestore(&serial->serial_lock, flags);
1483
1484         return chars;
1485 }
1486 static int tiocmget_submit_urb(struct hso_serial *serial,
1487                                struct hso_tiocmget *tiocmget,
1488                                struct usb_device *usb)
1489 {
1490         int result;
1491
1492         if (serial->parent->usb_gone)
1493                 return -ENODEV;
1494         usb_fill_int_urb(tiocmget->urb, usb,
1495                          usb_rcvintpipe(usb,
1496                                         tiocmget->endp->
1497                                         bEndpointAddress & 0x7F),
1498                          &tiocmget->serial_state_notification,
1499                          sizeof(struct hso_serial_state_notification),
1500                          tiocmget_intr_callback, serial,
1501                          tiocmget->endp->bInterval);
1502         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1503         if (result) {
1504                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1505                          result);
1506         }
1507         return result;
1508
1509 }
1510
1511 static void tiocmget_intr_callback(struct urb *urb)
1512 {
1513         struct hso_serial *serial = urb->context;
1514         struct hso_tiocmget *tiocmget;
1515         int status = urb->status;
1516         u16 UART_state_bitmap, prev_UART_state_bitmap;
1517         struct uart_icount *icount;
1518         struct hso_serial_state_notification *serial_state_notification;
1519         struct usb_device *usb;
1520
1521         /* Sanity checks */
1522         if (!serial)
1523                 return;
1524         if (status) {
1525                 handle_usb_error(status, __func__, serial->parent);
1526                 return;
1527         }
1528         tiocmget = serial->tiocmget;
1529         if (!tiocmget)
1530                 return;
1531         usb = serial->parent->usb;
1532         serial_state_notification = &tiocmget->serial_state_notification;
1533         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1534             serial_state_notification->bNotification != B_NOTIFICATION ||
1535             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1536             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1537             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1538                 dev_warn(&usb->dev,
1539                          "hso received invalid serial state notification\n");
1540                 DUMP(serial_state_notification,
1541                      sizeof(struct hso_serial_state_notification));
1542         } else {
1543
1544                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1545                                                 UART_state_bitmap);
1546                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1547                 icount = &tiocmget->icount;
1548                 spin_lock(&serial->serial_lock);
1549                 if ((UART_state_bitmap & B_OVERRUN) !=
1550                    (prev_UART_state_bitmap & B_OVERRUN))
1551                         icount->parity++;
1552                 if ((UART_state_bitmap & B_PARITY) !=
1553                    (prev_UART_state_bitmap & B_PARITY))
1554                         icount->parity++;
1555                 if ((UART_state_bitmap & B_FRAMING) !=
1556                    (prev_UART_state_bitmap & B_FRAMING))
1557                         icount->frame++;
1558                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1559                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1560                         icount->rng++;
1561                 if ((UART_state_bitmap & B_BREAK) !=
1562                    (prev_UART_state_bitmap & B_BREAK))
1563                         icount->brk++;
1564                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1565                    (prev_UART_state_bitmap & B_TX_CARRIER))
1566                         icount->dsr++;
1567                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1568                    (prev_UART_state_bitmap & B_RX_CARRIER))
1569                         icount->dcd++;
1570                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1571                 spin_unlock(&serial->serial_lock);
1572                 tiocmget->intr_completed = 1;
1573                 wake_up_interruptible(&tiocmget->waitq);
1574         }
1575         memset(serial_state_notification, 0,
1576                sizeof(struct hso_serial_state_notification));
1577         tiocmget_submit_urb(serial,
1578                             tiocmget,
1579                             serial->parent->usb);
1580 }
1581
1582 /*
1583  * next few functions largely stolen from drivers/serial/serial_core.c
1584  */
1585 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1586  * - mask passed in arg for lines of interest
1587  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1588  * Caller should use TIOCGICOUNT to see which one it was
1589  */
1590 static int
1591 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1592 {
1593         DECLARE_WAITQUEUE(wait, current);
1594         struct uart_icount cprev, cnow;
1595         struct hso_tiocmget  *tiocmget;
1596         int ret;
1597
1598         tiocmget = serial->tiocmget;
1599         if (!tiocmget)
1600                 return -ENOENT;
1601         /*
1602          * note the counters on entry
1603          */
1604         spin_lock_irq(&serial->serial_lock);
1605         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1606         spin_unlock_irq(&serial->serial_lock);
1607         add_wait_queue(&tiocmget->waitq, &wait);
1608         for (;;) {
1609                 spin_lock_irq(&serial->serial_lock);
1610                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1611                 spin_unlock_irq(&serial->serial_lock);
1612                 set_current_state(TASK_INTERRUPTIBLE);
1613                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1614                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1615                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1616                         ret = 0;
1617                         break;
1618                 }
1619                 schedule();
1620                 /* see if a signal did it */
1621                 if (signal_pending(current)) {
1622                         ret = -ERESTARTSYS;
1623                         break;
1624                 }
1625                 cprev = cnow;
1626         }
1627         current->state = TASK_RUNNING;
1628         remove_wait_queue(&tiocmget->waitq, &wait);
1629
1630         return ret;
1631 }
1632
1633 /*
1634  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1635  * Return: write counters to the user passed counter struct
1636  * NB: both 1->0 and 0->1 transitions are counted except for
1637  *     RI where only 0->1 is counted.
1638  */
1639 static int hso_get_count(struct tty_struct *tty,
1640                   struct serial_icounter_struct *icount)
1641 {
1642         struct uart_icount cnow;
1643         struct hso_serial *serial = get_serial_by_tty(tty);
1644         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1645
1646         memset(&icount, 0, sizeof(struct serial_icounter_struct));
1647
1648         if (!tiocmget)
1649                  return -ENOENT;
1650         spin_lock_irq(&serial->serial_lock);
1651         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1652         spin_unlock_irq(&serial->serial_lock);
1653
1654         icount->cts         = cnow.cts;
1655         icount->dsr         = cnow.dsr;
1656         icount->rng         = cnow.rng;
1657         icount->dcd         = cnow.dcd;
1658         icount->rx          = cnow.rx;
1659         icount->tx          = cnow.tx;
1660         icount->frame       = cnow.frame;
1661         icount->overrun     = cnow.overrun;
1662         icount->parity      = cnow.parity;
1663         icount->brk         = cnow.brk;
1664         icount->buf_overrun = cnow.buf_overrun;
1665
1666         return 0;
1667 }
1668
1669
1670 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1671 {
1672         int retval;
1673         struct hso_serial *serial = get_serial_by_tty(tty);
1674         struct hso_tiocmget  *tiocmget;
1675         u16 UART_state_bitmap;
1676
1677         /* sanity check */
1678         if (!serial) {
1679                 D1("no tty structures");
1680                 return -EINVAL;
1681         }
1682         spin_lock_irq(&serial->serial_lock);
1683         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1684             ((serial->dtr_state) ? TIOCM_DTR : 0);
1685         tiocmget = serial->tiocmget;
1686         if (tiocmget) {
1687
1688                 UART_state_bitmap = le16_to_cpu(
1689                         tiocmget->prev_UART_state_bitmap);
1690                 if (UART_state_bitmap & B_RING_SIGNAL)
1691                         retval |=  TIOCM_RNG;
1692                 if (UART_state_bitmap & B_RX_CARRIER)
1693                         retval |=  TIOCM_CD;
1694                 if (UART_state_bitmap & B_TX_CARRIER)
1695                         retval |=  TIOCM_DSR;
1696         }
1697         spin_unlock_irq(&serial->serial_lock);
1698         return retval;
1699 }
1700
1701 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1702                                unsigned int set, unsigned int clear)
1703 {
1704         int val = 0;
1705         unsigned long flags;
1706         int if_num;
1707         struct hso_serial *serial = get_serial_by_tty(tty);
1708
1709         /* sanity check */
1710         if (!serial) {
1711                 D1("no tty structures");
1712                 return -EINVAL;
1713         }
1714
1715         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1716                 return -EINVAL;
1717
1718         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1719
1720         spin_lock_irqsave(&serial->serial_lock, flags);
1721         if (set & TIOCM_RTS)
1722                 serial->rts_state = 1;
1723         if (set & TIOCM_DTR)
1724                 serial->dtr_state = 1;
1725
1726         if (clear & TIOCM_RTS)
1727                 serial->rts_state = 0;
1728         if (clear & TIOCM_DTR)
1729                 serial->dtr_state = 0;
1730
1731         if (serial->dtr_state)
1732                 val |= 0x01;
1733         if (serial->rts_state)
1734                 val |= 0x02;
1735
1736         spin_unlock_irqrestore(&serial->serial_lock, flags);
1737
1738         return usb_control_msg(serial->parent->usb,
1739                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1740                                0x21, val, if_num, NULL, 0,
1741                                USB_CTRL_SET_TIMEOUT);
1742 }
1743
1744 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1745                             unsigned int cmd, unsigned long arg)
1746 {
1747         struct hso_serial *serial =  get_serial_by_tty(tty);
1748         void __user *uarg = (void __user *)arg;
1749         int ret = 0;
1750         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1751
1752         if (!serial)
1753                 return -ENODEV;
1754         switch (cmd) {
1755         case TIOCMIWAIT:
1756                 ret = hso_wait_modem_status(serial, arg);
1757                 break;
1758         default:
1759                 ret = -ENOIOCTLCMD;
1760                 break;
1761         }
1762         return ret;
1763 }
1764
1765
1766 /* starts a transmit */
1767 static void hso_kick_transmit(struct hso_serial *serial)
1768 {
1769         u8 *temp;
1770         unsigned long flags;
1771         int res;
1772
1773         spin_lock_irqsave(&serial->serial_lock, flags);
1774         if (!serial->tx_buffer_count)
1775                 goto out;
1776
1777         if (serial->tx_urb_used)
1778                 goto out;
1779
1780         /* Wakeup USB interface if necessary */
1781         if (hso_get_activity(serial->parent) == -EAGAIN)
1782                 goto out;
1783
1784         /* Switch pointers around to avoid memcpy */
1785         temp = serial->tx_buffer;
1786         serial->tx_buffer = serial->tx_data;
1787         serial->tx_data = temp;
1788         serial->tx_data_count = serial->tx_buffer_count;
1789         serial->tx_buffer_count = 0;
1790
1791         /* If temp is set, it means we switched buffers */
1792         if (temp && serial->write_data) {
1793                 res = serial->write_data(serial);
1794                 if (res >= 0)
1795                         serial->tx_urb_used = 1;
1796         }
1797 out:
1798         spin_unlock_irqrestore(&serial->serial_lock, flags);
1799 }
1800
1801 /* make a request (for reading and writing data to muxed serial port) */
1802 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1803                               struct urb *ctrl_urb,
1804                               struct usb_ctrlrequest *ctrl_req,
1805                               u8 *ctrl_urb_data, u32 size)
1806 {
1807         int result;
1808         int pipe;
1809
1810         /* Sanity check */
1811         if (!serial || !ctrl_urb || !ctrl_req) {
1812                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1813                 return -EINVAL;
1814         }
1815
1816         /* initialize */
1817         ctrl_req->wValue = 0;
1818         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1819         ctrl_req->wLength = cpu_to_le16(size);
1820
1821         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1822                 /* Reading command */
1823                 ctrl_req->bRequestType = USB_DIR_IN |
1824                                          USB_TYPE_OPTION_VENDOR |
1825                                          USB_RECIP_INTERFACE;
1826                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1827                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1828         } else {
1829                 /* Writing command */
1830                 ctrl_req->bRequestType = USB_DIR_OUT |
1831                                          USB_TYPE_OPTION_VENDOR |
1832                                          USB_RECIP_INTERFACE;
1833                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1834                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1835         }
1836         /* syslog */
1837         D2("%s command (%02x) len: %d, port: %d",
1838            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1839            ctrl_req->bRequestType, ctrl_req->wLength, port);
1840
1841         /* Load ctrl urb */
1842         ctrl_urb->transfer_flags = 0;
1843         usb_fill_control_urb(ctrl_urb,
1844                              serial->parent->usb,
1845                              pipe,
1846                              (u8 *) ctrl_req,
1847                              ctrl_urb_data, size, ctrl_callback, serial);
1848         /* Send it on merry way */
1849         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1850         if (result) {
1851                 dev_err(&ctrl_urb->dev->dev,
1852                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1853                         result, type);
1854                 return result;
1855         }
1856
1857         /* done */
1858         return size;
1859 }
1860
1861 /* called by intr_callback when read occurs */
1862 static int hso_mux_serial_read(struct hso_serial *serial)
1863 {
1864         if (!serial)
1865                 return -EINVAL;
1866
1867         /* clean data */
1868         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1869         /* make the request */
1870
1871         if (serial->num_rx_urbs != 1) {
1872                 dev_err(&serial->parent->interface->dev,
1873                         "ERROR: mux'd reads with multiple buffers "
1874                         "not possible\n");
1875                 return 0;
1876         }
1877         return mux_device_request(serial,
1878                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1879                                   serial->parent->port_spec & HSO_PORT_MASK,
1880                                   serial->rx_urb[0],
1881                                   &serial->ctrl_req_rx,
1882                                   serial->rx_data[0], serial->rx_data_length);
1883 }
1884
1885 /* used for muxed serial port callback (muxed serial read) */
1886 static void intr_callback(struct urb *urb)
1887 {
1888         struct hso_shared_int *shared_int = urb->context;
1889         struct hso_serial *serial;
1890         unsigned char *port_req;
1891         int status = urb->status;
1892         int i;
1893
1894         usb_mark_last_busy(urb->dev);
1895
1896         /* sanity check */
1897         if (!shared_int)
1898                 return;
1899
1900         /* status check */
1901         if (status) {
1902                 handle_usb_error(status, __func__, NULL);
1903                 return;
1904         }
1905         D4("\n--- Got intr callback 0x%02X ---", status);
1906
1907         /* what request? */
1908         port_req = urb->transfer_buffer;
1909         D4(" port_req = 0x%.2X\n", *port_req);
1910         /* loop over all muxed ports to find the one sending this */
1911         for (i = 0; i < 8; i++) {
1912                 /* max 8 channels on MUX */
1913                 if (*port_req & (1 << i)) {
1914                         serial = get_serial_by_shared_int_and_type(shared_int,
1915                                                                    (1 << i));
1916                         if (serial != NULL) {
1917                                 D1("Pending read interrupt on port %d\n", i);
1918                                 spin_lock(&serial->serial_lock);
1919                                 if (serial->rx_state == RX_IDLE &&
1920                                         serial->open_count > 0) {
1921                                         /* Setup and send a ctrl req read on
1922                                          * port i */
1923                                         if (!serial->rx_urb_filled[0]) {
1924                                                 serial->rx_state = RX_SENT;
1925                                                 hso_mux_serial_read(serial);
1926                                         } else
1927                                                 serial->rx_state = RX_PENDING;
1928                                 } else {
1929                                         D1("Already a read pending on "
1930                                            "port %d or port not open\n", i);
1931                                 }
1932                                 spin_unlock(&serial->serial_lock);
1933                         }
1934                 }
1935         }
1936         /* Resubmit interrupt urb */
1937         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1938 }
1939
1940 /* called for writing to muxed serial port */
1941 static int hso_mux_serial_write_data(struct hso_serial *serial)
1942 {
1943         if (NULL == serial)
1944                 return -EINVAL;
1945
1946         return mux_device_request(serial,
1947                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1948                                   serial->parent->port_spec & HSO_PORT_MASK,
1949                                   serial->tx_urb,
1950                                   &serial->ctrl_req_tx,
1951                                   serial->tx_data, serial->tx_data_count);
1952 }
1953
1954 /* write callback for Diag and CS port */
1955 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1956 {
1957         struct hso_serial *serial = urb->context;
1958         int status = urb->status;
1959         struct tty_struct *tty;
1960
1961         /* sanity check */
1962         if (!serial) {
1963                 D1("serial == NULL");
1964                 return;
1965         }
1966
1967         spin_lock(&serial->serial_lock);
1968         serial->tx_urb_used = 0;
1969         tty = tty_kref_get(serial->tty);
1970         spin_unlock(&serial->serial_lock);
1971         if (status) {
1972                 handle_usb_error(status, __func__, serial->parent);
1973                 tty_kref_put(tty);
1974                 return;
1975         }
1976         hso_put_activity(serial->parent);
1977         if (tty) {
1978                 tty_wakeup(tty);
1979                 tty_kref_put(tty);
1980         }
1981         hso_kick_transmit(serial);
1982
1983         D1(" ");
1984 }
1985
1986 /* called for writing diag or CS serial port */
1987 static int hso_std_serial_write_data(struct hso_serial *serial)
1988 {
1989         int count = serial->tx_data_count;
1990         int result;
1991
1992         usb_fill_bulk_urb(serial->tx_urb,
1993                           serial->parent->usb,
1994                           usb_sndbulkpipe(serial->parent->usb,
1995                                           serial->out_endp->
1996                                           bEndpointAddress & 0x7F),
1997                           serial->tx_data, serial->tx_data_count,
1998                           hso_std_serial_write_bulk_callback, serial);
1999
2000         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2001         if (result) {
2002                 dev_warn(&serial->parent->usb->dev,
2003                          "Failed to submit urb - res %d\n", result);
2004                 return result;
2005         }
2006
2007         return count;
2008 }
2009
2010 /* callback after read or write on muxed serial port */
2011 static void ctrl_callback(struct urb *urb)
2012 {
2013         struct hso_serial *serial = urb->context;
2014         struct usb_ctrlrequest *req;
2015         int status = urb->status;
2016         struct tty_struct *tty;
2017
2018         /* sanity check */
2019         if (!serial)
2020                 return;
2021
2022         spin_lock(&serial->serial_lock);
2023         serial->tx_urb_used = 0;
2024         tty = tty_kref_get(serial->tty);
2025         spin_unlock(&serial->serial_lock);
2026         if (status) {
2027                 handle_usb_error(status, __func__, serial->parent);
2028                 tty_kref_put(tty);
2029                 return;
2030         }
2031
2032         /* what request? */
2033         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2034         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2035         D4("Actual length of urb = %d\n", urb->actual_length);
2036         DUMP1(urb->transfer_buffer, urb->actual_length);
2037
2038         if (req->bRequestType ==
2039             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2040                 /* response to a read command */
2041                 serial->rx_urb_filled[0] = 1;
2042                 spin_lock(&serial->serial_lock);
2043                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2044                 spin_unlock(&serial->serial_lock);
2045         } else {
2046                 hso_put_activity(serial->parent);
2047                 if (tty)
2048                         tty_wakeup(tty);
2049                 /* response to a write command */
2050                 hso_kick_transmit(serial);
2051         }
2052         tty_kref_put(tty);
2053 }
2054
2055 /* handle RX data for serial port */
2056 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2057 {
2058         struct tty_struct *tty;
2059         int write_length_remaining = 0;
2060         int curr_write_len;
2061
2062         /* Sanity check */
2063         if (urb == NULL || serial == NULL) {
2064                 D1("serial = NULL");
2065                 return -2;
2066         }
2067
2068         /* All callers to put_rxbuf_data hold serial_lock */
2069         tty = tty_kref_get(serial->tty);
2070
2071         /* Push data to tty */
2072         if (tty) {
2073                 write_length_remaining = urb->actual_length -
2074                         serial->curr_rx_urb_offset;
2075                 D1("data to push to tty");
2076                 while (write_length_remaining) {
2077                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2078                                 tty_kref_put(tty);
2079                                 return -1;
2080                         }
2081                         curr_write_len =  tty_insert_flip_string
2082                                 (tty, urb->transfer_buffer +
2083                                  serial->curr_rx_urb_offset,
2084                                  write_length_remaining);
2085                         serial->curr_rx_urb_offset += curr_write_len;
2086                         write_length_remaining -= curr_write_len;
2087                         tty_flip_buffer_push(tty);
2088                 }
2089         }
2090         if (write_length_remaining == 0) {
2091                 serial->curr_rx_urb_offset = 0;
2092                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2093         }
2094         tty_kref_put(tty);
2095         return write_length_remaining;
2096 }
2097
2098
2099 /* Base driver functions */
2100
2101 static void hso_log_port(struct hso_device *hso_dev)
2102 {
2103         char *port_type;
2104         char port_dev[20];
2105
2106         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2107         case HSO_PORT_CONTROL:
2108                 port_type = "Control";
2109                 break;
2110         case HSO_PORT_APP:
2111                 port_type = "Application";
2112                 break;
2113         case HSO_PORT_GPS:
2114                 port_type = "GPS";
2115                 break;
2116         case HSO_PORT_GPS_CONTROL:
2117                 port_type = "GPS control";
2118                 break;
2119         case HSO_PORT_APP2:
2120                 port_type = "Application2";
2121                 break;
2122         case HSO_PORT_PCSC:
2123                 port_type = "PCSC";
2124                 break;
2125         case HSO_PORT_DIAG:
2126                 port_type = "Diagnostic";
2127                 break;
2128         case HSO_PORT_DIAG2:
2129                 port_type = "Diagnostic2";
2130                 break;
2131         case HSO_PORT_MODEM:
2132                 port_type = "Modem";
2133                 break;
2134         case HSO_PORT_NETWORK:
2135                 port_type = "Network";
2136                 break;
2137         default:
2138                 port_type = "Unknown";
2139                 break;
2140         }
2141         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2142                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2143         } else
2144                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2145                         dev2ser(hso_dev)->minor);
2146
2147         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2148                 port_type, port_dev);
2149 }
2150
2151 static int hso_start_net_device(struct hso_device *hso_dev)
2152 {
2153         int i, result = 0;
2154         struct hso_net *hso_net = dev2net(hso_dev);
2155
2156         if (!hso_net)
2157                 return -ENODEV;
2158
2159         /* send URBs for all read buffers */
2160         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2161
2162                 /* Prep a receive URB */
2163                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2164                                   hso_dev->usb,
2165                                   usb_rcvbulkpipe(hso_dev->usb,
2166                                                   hso_net->in_endp->
2167                                                   bEndpointAddress & 0x7F),
2168                                   hso_net->mux_bulk_rx_buf_pool[i],
2169                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2170                                   hso_net);
2171
2172                 /* Put it out there so the device can send us stuff */
2173                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2174                                         GFP_NOIO);
2175                 if (result)
2176                         dev_warn(&hso_dev->usb->dev,
2177                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2178                                 i, result);
2179         }
2180
2181         return result;
2182 }
2183
2184 static int hso_stop_net_device(struct hso_device *hso_dev)
2185 {
2186         int i;
2187         struct hso_net *hso_net = dev2net(hso_dev);
2188
2189         if (!hso_net)
2190                 return -ENODEV;
2191
2192         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2193                 if (hso_net->mux_bulk_rx_urb_pool[i])
2194                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2195
2196         }
2197         if (hso_net->mux_bulk_tx_urb)
2198                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2199
2200         return 0;
2201 }
2202
2203 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2204 {
2205         int i, result = 0;
2206         struct hso_serial *serial = dev2ser(hso_dev);
2207
2208         if (!serial)
2209                 return -ENODEV;
2210
2211         /* If it is not the MUX port fill in and submit a bulk urb (already
2212          * allocated in hso_serial_start) */
2213         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2214                 for (i = 0; i < serial->num_rx_urbs; i++) {
2215                         usb_fill_bulk_urb(serial->rx_urb[i],
2216                                           serial->parent->usb,
2217                                           usb_rcvbulkpipe(serial->parent->usb,
2218                                                           serial->in_endp->
2219                                                           bEndpointAddress &
2220                                                           0x7F),
2221                                           serial->rx_data[i],
2222                                           serial->rx_data_length,
2223                                           hso_std_serial_read_bulk_callback,
2224                                           serial);
2225                         result = usb_submit_urb(serial->rx_urb[i], flags);
2226                         if (result) {
2227                                 dev_warn(&serial->parent->usb->dev,
2228                                          "Failed to submit urb - res %d\n",
2229                                          result);
2230                                 break;
2231                         }
2232                 }
2233         } else {
2234                 mutex_lock(&serial->shared_int->shared_int_lock);
2235                 if (!serial->shared_int->use_count) {
2236                         result =
2237                             hso_mux_submit_intr_urb(serial->shared_int,
2238                                                     hso_dev->usb, flags);
2239                 }
2240                 serial->shared_int->use_count++;
2241                 mutex_unlock(&serial->shared_int->shared_int_lock);
2242         }
2243         if (serial->tiocmget)
2244                 tiocmget_submit_urb(serial,
2245                                     serial->tiocmget,
2246                                     serial->parent->usb);
2247         return result;
2248 }
2249
2250 static int hso_stop_serial_device(struct hso_device *hso_dev)
2251 {
2252         int i;
2253         struct hso_serial *serial = dev2ser(hso_dev);
2254         struct hso_tiocmget  *tiocmget;
2255
2256         if (!serial)
2257                 return -ENODEV;
2258
2259         for (i = 0; i < serial->num_rx_urbs; i++) {
2260                 if (serial->rx_urb[i]) {
2261                                 usb_kill_urb(serial->rx_urb[i]);
2262                                 serial->rx_urb_filled[i] = 0;
2263                 }
2264         }
2265         serial->curr_rx_urb_idx = 0;
2266         serial->curr_rx_urb_offset = 0;
2267
2268         if (serial->tx_urb)
2269                 usb_kill_urb(serial->tx_urb);
2270
2271         if (serial->shared_int) {
2272                 mutex_lock(&serial->shared_int->shared_int_lock);
2273                 if (serial->shared_int->use_count &&
2274                     (--serial->shared_int->use_count == 0)) {
2275                         struct urb *urb;
2276
2277                         urb = serial->shared_int->shared_intr_urb;
2278                         if (urb)
2279                                 usb_kill_urb(urb);
2280                 }
2281                 mutex_unlock(&serial->shared_int->shared_int_lock);
2282         }
2283         tiocmget = serial->tiocmget;
2284         if (tiocmget) {
2285                 wake_up_interruptible(&tiocmget->waitq);
2286                 usb_kill_urb(tiocmget->urb);
2287         }
2288
2289         return 0;
2290 }
2291
2292 static void hso_serial_common_free(struct hso_serial *serial)
2293 {
2294         int i;
2295
2296         if (serial->parent->dev)
2297                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2298
2299         tty_unregister_device(tty_drv, serial->minor);
2300
2301         for (i = 0; i < serial->num_rx_urbs; i++) {
2302                 /* unlink and free RX URB */
2303                 usb_free_urb(serial->rx_urb[i]);
2304                 /* free the RX buffer */
2305                 kfree(serial->rx_data[i]);
2306         }
2307
2308         /* unlink and free TX URB */
2309         usb_free_urb(serial->tx_urb);
2310         kfree(serial->tx_data);
2311 }
2312
2313 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2314                                     int rx_size, int tx_size)
2315 {
2316         struct device *dev;
2317         int minor;
2318         int i;
2319
2320         minor = get_free_serial_index();
2321         if (minor < 0)
2322                 goto exit;
2323
2324         /* register our minor number */
2325         serial->parent->dev = tty_register_device(tty_drv, minor,
2326                                         &serial->parent->interface->dev);
2327         dev = serial->parent->dev;
2328         dev_set_drvdata(dev, serial->parent);
2329         i = device_create_file(dev, &dev_attr_hsotype);
2330
2331         /* fill in specific data for later use */
2332         serial->minor = minor;
2333         serial->magic = HSO_SERIAL_MAGIC;
2334         spin_lock_init(&serial->serial_lock);
2335         serial->num_rx_urbs = num_urbs;
2336
2337         /* RX, allocate urb and initialize */
2338
2339         /* prepare our RX buffer */
2340         serial->rx_data_length = rx_size;
2341         for (i = 0; i < serial->num_rx_urbs; i++) {
2342                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2343                 if (!serial->rx_urb[i]) {
2344                         dev_err(dev, "Could not allocate urb?\n");
2345                         goto exit;
2346                 }
2347                 serial->rx_urb[i]->transfer_buffer = NULL;
2348                 serial->rx_urb[i]->transfer_buffer_length = 0;
2349                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2350                                              GFP_KERNEL);
2351                 if (!serial->rx_data[i]) {
2352                         dev_err(dev, "%s - Out of memory\n", __func__);
2353                         goto exit;
2354                 }
2355         }
2356
2357         /* TX, allocate urb and initialize */
2358         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2359         if (!serial->tx_urb) {
2360                 dev_err(dev, "Could not allocate urb?\n");
2361                 goto exit;
2362         }
2363         serial->tx_urb->transfer_buffer = NULL;
2364         serial->tx_urb->transfer_buffer_length = 0;
2365         /* prepare our TX buffer */
2366         serial->tx_data_count = 0;
2367         serial->tx_buffer_count = 0;
2368         serial->tx_data_length = tx_size;
2369         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2370         if (!serial->tx_data) {
2371                 dev_err(dev, "%s - Out of memory\n", __func__);
2372                 goto exit;
2373         }
2374         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2375         if (!serial->tx_buffer) {
2376                 dev_err(dev, "%s - Out of memory\n", __func__);
2377                 goto exit;
2378         }
2379
2380         return 0;
2381 exit:
2382         hso_serial_common_free(serial);
2383         return -1;
2384 }
2385
2386 /* Creates a general hso device */
2387 static struct hso_device *hso_create_device(struct usb_interface *intf,
2388                                             int port_spec)
2389 {
2390         struct hso_device *hso_dev;
2391
2392         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2393         if (!hso_dev)
2394                 return NULL;
2395
2396         hso_dev->port_spec = port_spec;
2397         hso_dev->usb = interface_to_usbdev(intf);
2398         hso_dev->interface = intf;
2399         kref_init(&hso_dev->ref);
2400         mutex_init(&hso_dev->mutex);
2401
2402         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2403         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2404         INIT_WORK(&hso_dev->reset_device, reset_device);
2405
2406         return hso_dev;
2407 }
2408
2409 /* Removes a network device in the network device table */
2410 static int remove_net_device(struct hso_device *hso_dev)
2411 {
2412         int i;
2413
2414         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2415                 if (network_table[i] == hso_dev) {
2416                         network_table[i] = NULL;
2417                         break;
2418                 }
2419         }
2420         if (i == HSO_MAX_NET_DEVICES)
2421                 return -1;
2422         return 0;
2423 }
2424
2425 /* Frees our network device */
2426 static void hso_free_net_device(struct hso_device *hso_dev)
2427 {
2428         int i;
2429         struct hso_net *hso_net = dev2net(hso_dev);
2430
2431         if (!hso_net)
2432                 return;
2433
2434         remove_net_device(hso_net->parent);
2435
2436         if (hso_net->net) {
2437                 unregister_netdev(hso_net->net);
2438                 free_netdev(hso_net->net);
2439         }
2440
2441         /* start freeing */
2442         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2443                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2444                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2445                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2446         }
2447         usb_free_urb(hso_net->mux_bulk_tx_urb);
2448         kfree(hso_net->mux_bulk_tx_buf);
2449         hso_net->mux_bulk_tx_buf = NULL;
2450
2451         kfree(hso_dev);
2452 }
2453
2454 static const struct net_device_ops hso_netdev_ops = {
2455         .ndo_open       = hso_net_open,
2456         .ndo_stop       = hso_net_close,
2457         .ndo_start_xmit = hso_net_start_xmit,
2458         .ndo_tx_timeout = hso_net_tx_timeout,
2459 };
2460
2461 /* initialize the network interface */
2462 static void hso_net_init(struct net_device *net)
2463 {
2464         struct hso_net *hso_net = netdev_priv(net);
2465
2466         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2467
2468         /* fill in the other fields */
2469         net->netdev_ops = &hso_netdev_ops;
2470         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2471         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2472         net->type = ARPHRD_NONE;
2473         net->mtu = DEFAULT_MTU - 14;
2474         net->tx_queue_len = 10;
2475         SET_ETHTOOL_OPS(net, &ops);
2476
2477         /* and initialize the semaphore */
2478         spin_lock_init(&hso_net->net_lock);
2479 }
2480
2481 /* Adds a network device in the network device table */
2482 static int add_net_device(struct hso_device *hso_dev)
2483 {
2484         int i;
2485
2486         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2487                 if (network_table[i] == NULL) {
2488                         network_table[i] = hso_dev;
2489                         break;
2490                 }
2491         }
2492         if (i == HSO_MAX_NET_DEVICES)
2493                 return -1;
2494         return 0;
2495 }
2496
2497 static int hso_rfkill_set_block(void *data, bool blocked)
2498 {
2499         struct hso_device *hso_dev = data;
2500         int enabled = !blocked;
2501         int rv;
2502
2503         mutex_lock(&hso_dev->mutex);
2504         if (hso_dev->usb_gone)
2505                 rv = 0;
2506         else
2507                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2508                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2509                                        USB_CTRL_SET_TIMEOUT);
2510         mutex_unlock(&hso_dev->mutex);
2511         return rv;
2512 }
2513
2514 static const struct rfkill_ops hso_rfkill_ops = {
2515         .set_block = hso_rfkill_set_block,
2516 };
2517
2518 /* Creates and sets up everything for rfkill */
2519 static void hso_create_rfkill(struct hso_device *hso_dev,
2520                              struct usb_interface *interface)
2521 {
2522         struct hso_net *hso_net = dev2net(hso_dev);
2523         struct device *dev = &hso_net->net->dev;
2524         char *rfkn;
2525
2526         rfkn = kzalloc(20, GFP_KERNEL);
2527         if (!rfkn)
2528                 dev_err(dev, "%s - Out of memory\n", __func__);
2529
2530         snprintf(rfkn, 20, "hso-%d",
2531                  interface->altsetting->desc.bInterfaceNumber);
2532
2533         hso_net->rfkill = rfkill_alloc(rfkn,
2534                                        &interface_to_usbdev(interface)->dev,
2535                                        RFKILL_TYPE_WWAN,
2536                                        &hso_rfkill_ops, hso_dev);
2537         if (!hso_net->rfkill) {
2538                 dev_err(dev, "%s - Out of memory\n", __func__);
2539                 kfree(rfkn);
2540                 return;
2541         }
2542         if (rfkill_register(hso_net->rfkill) < 0) {
2543                 rfkill_destroy(hso_net->rfkill);
2544                 kfree(rfkn);
2545                 hso_net->rfkill = NULL;
2546                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2547                 return;
2548         }
2549 }
2550
2551 static struct device_type hso_type = {
2552         .name   = "wwan",
2553 };
2554
2555 /* Creates our network device */
2556 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2557                                                 int port_spec)
2558 {
2559         int result, i;
2560         struct net_device *net;
2561         struct hso_net *hso_net;
2562         struct hso_device *hso_dev;
2563
2564         hso_dev = hso_create_device(interface, port_spec);
2565         if (!hso_dev)
2566                 return NULL;
2567
2568         /* allocate our network device, then we can put in our private data */
2569         /* call hso_net_init to do the basic initialization */
2570         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2571         if (!net) {
2572                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2573                 goto exit;
2574         }
2575
2576         hso_net = netdev_priv(net);
2577
2578         hso_dev->port_data.dev_net = hso_net;
2579         hso_net->net = net;
2580         hso_net->parent = hso_dev;
2581
2582         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2583                                       USB_DIR_IN);
2584         if (!hso_net->in_endp) {
2585                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2586                 goto exit;
2587         }
2588         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2589                                        USB_DIR_OUT);
2590         if (!hso_net->out_endp) {
2591                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2592                 goto exit;
2593         }
2594         SET_NETDEV_DEV(net, &interface->dev);
2595         SET_NETDEV_DEVTYPE(net, &hso_type);
2596
2597         /* registering our net device */
2598         result = register_netdev(net);
2599         if (result) {
2600                 dev_err(&interface->dev, "Failed to register device\n");
2601                 goto exit;
2602         }
2603
2604         /* start allocating */
2605         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2606                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2607                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2608                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2609                         goto exit;
2610                 }
2611                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2612                                                            GFP_KERNEL);
2613                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2614                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2615                         goto exit;
2616                 }
2617         }
2618         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2619         if (!hso_net->mux_bulk_tx_urb) {
2620                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2621                 goto exit;
2622         }
2623         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2624         if (!hso_net->mux_bulk_tx_buf) {
2625                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2626                 goto exit;
2627         }
2628
2629         add_net_device(hso_dev);
2630
2631         hso_log_port(hso_dev);
2632
2633         hso_create_rfkill(hso_dev, interface);
2634
2635         return hso_dev;
2636 exit:
2637         hso_free_net_device(hso_dev);
2638         return NULL;
2639 }
2640
2641 static void hso_free_tiomget(struct hso_serial *serial)
2642 {
2643         struct hso_tiocmget *tiocmget = serial->tiocmget;
2644         if (tiocmget) {
2645                 if (tiocmget->urb) {
2646                         usb_free_urb(tiocmget->urb);
2647                         tiocmget->urb = NULL;
2648                 }
2649                 serial->tiocmget = NULL;
2650                 kfree(tiocmget);
2651
2652         }
2653 }
2654
2655 /* Frees an AT channel ( goes for both mux and non-mux ) */
2656 static void hso_free_serial_device(struct hso_device *hso_dev)
2657 {
2658         struct hso_serial *serial = dev2ser(hso_dev);
2659
2660         if (!serial)
2661                 return;
2662         set_serial_by_index(serial->minor, NULL);
2663
2664         hso_serial_common_free(serial);
2665
2666         if (serial->shared_int) {
2667                 mutex_lock(&serial->shared_int->shared_int_lock);
2668                 if (--serial->shared_int->ref_count == 0)
2669                         hso_free_shared_int(serial->shared_int);
2670                 else
2671                         mutex_unlock(&serial->shared_int->shared_int_lock);
2672         }
2673         hso_free_tiomget(serial);
2674         kfree(serial);
2675         kfree(hso_dev);
2676 }
2677
2678 /* Creates a bulk AT channel */
2679 static struct hso_device *hso_create_bulk_serial_device(
2680                         struct usb_interface *interface, int port)
2681 {
2682         struct hso_device *hso_dev;
2683         struct hso_serial *serial;
2684         int num_urbs;
2685         struct hso_tiocmget *tiocmget;
2686
2687         hso_dev = hso_create_device(interface, port);
2688         if (!hso_dev)
2689                 return NULL;
2690
2691         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2692         if (!serial)
2693                 goto exit;
2694
2695         serial->parent = hso_dev;
2696         hso_dev->port_data.dev_serial = serial;
2697
2698         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2699                 num_urbs = 2;
2700                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2701                                            GFP_KERNEL);
2702                 /* it isn't going to break our heart if serial->tiocmget
2703                  *  allocation fails don't bother checking this.
2704                  */
2705                 if (serial->tiocmget) {
2706                         tiocmget = serial->tiocmget;
2707                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2708                         if (tiocmget->urb) {
2709                                 mutex_init(&tiocmget->mutex);
2710                                 init_waitqueue_head(&tiocmget->waitq);
2711                                 tiocmget->endp = hso_get_ep(
2712                                         interface,
2713                                         USB_ENDPOINT_XFER_INT,
2714                                         USB_DIR_IN);
2715                         } else
2716                                 hso_free_tiomget(serial);
2717                 }
2718         }
2719         else
2720                 num_urbs = 1;
2721
2722         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2723                                      BULK_URB_TX_SIZE))
2724                 goto exit;
2725
2726         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2727                                      USB_DIR_IN);
2728         if (!serial->in_endp) {
2729                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2730                 goto exit2;
2731         }
2732
2733         if (!
2734             (serial->out_endp =
2735              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2736                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2737                 goto exit2;
2738         }
2739
2740         serial->write_data = hso_std_serial_write_data;
2741
2742         /* and record this serial */
2743         set_serial_by_index(serial->minor, serial);
2744
2745         /* setup the proc dirs and files if needed */
2746         hso_log_port(hso_dev);
2747
2748         /* done, return it */
2749         return hso_dev;
2750
2751 exit2:
2752         hso_serial_common_free(serial);
2753 exit:
2754         hso_free_tiomget(serial);
2755         kfree(serial);
2756         kfree(hso_dev);
2757         return NULL;
2758 }
2759
2760 /* Creates a multiplexed AT channel */
2761 static
2762 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2763                                                 int port,
2764                                                 struct hso_shared_int *mux)
2765 {
2766         struct hso_device *hso_dev;
2767         struct hso_serial *serial;
2768         int port_spec;
2769
2770         port_spec = HSO_INTF_MUX;
2771         port_spec &= ~HSO_PORT_MASK;
2772
2773         port_spec |= hso_mux_to_port(port);
2774         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2775                 return NULL;
2776
2777         hso_dev = hso_create_device(interface, port_spec);
2778         if (!hso_dev)
2779                 return NULL;
2780
2781         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2782         if (!serial)
2783                 goto exit;
2784
2785         hso_dev->port_data.dev_serial = serial;
2786         serial->parent = hso_dev;
2787
2788         if (hso_serial_common_create
2789             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2790                 goto exit;
2791
2792         serial->tx_data_length--;
2793         serial->write_data = hso_mux_serial_write_data;
2794
2795         serial->shared_int = mux;
2796         mutex_lock(&serial->shared_int->shared_int_lock);
2797         serial->shared_int->ref_count++;
2798         mutex_unlock(&serial->shared_int->shared_int_lock);
2799
2800         /* and record this serial */
2801         set_serial_by_index(serial->minor, serial);
2802
2803         /* setup the proc dirs and files if needed */
2804         hso_log_port(hso_dev);
2805
2806         /* done, return it */
2807         return hso_dev;
2808
2809 exit:
2810         if (serial) {
2811                 tty_unregister_device(tty_drv, serial->minor);
2812                 kfree(serial);
2813         }
2814         if (hso_dev)
2815                 kfree(hso_dev);
2816         return NULL;
2817
2818 }
2819
2820 static void hso_free_shared_int(struct hso_shared_int *mux)
2821 {
2822         usb_free_urb(mux->shared_intr_urb);
2823         kfree(mux->shared_intr_buf);
2824         mutex_unlock(&mux->shared_int_lock);
2825         kfree(mux);
2826 }
2827
2828 static
2829 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2830 {
2831         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2832
2833         if (!mux)
2834                 return NULL;
2835
2836         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2837                                     USB_DIR_IN);
2838         if (!mux->intr_endp) {
2839                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2840                 goto exit;
2841         }
2842
2843         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2844         if (!mux->shared_intr_urb) {
2845                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2846                 goto exit;
2847         }
2848         mux->shared_intr_buf =
2849                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2850                         GFP_KERNEL);
2851         if (!mux->shared_intr_buf) {
2852                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2853                 goto exit;
2854         }
2855
2856         mutex_init(&mux->shared_int_lock);
2857
2858         return mux;
2859
2860 exit:
2861         kfree(mux->shared_intr_buf);
2862         usb_free_urb(mux->shared_intr_urb);
2863         kfree(mux);
2864         return NULL;
2865 }
2866
2867 /* Gets the port spec for a certain interface */
2868 static int hso_get_config_data(struct usb_interface *interface)
2869 {
2870         struct usb_device *usbdev = interface_to_usbdev(interface);
2871         u8 config_data[17];
2872         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2873         s32 result;
2874
2875         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2876                             0x86, 0xC0, 0, 0, config_data, 17,
2877                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2878                 return -EIO;
2879         }
2880
2881         switch (config_data[if_num]) {
2882         case 0x0:
2883                 result = 0;
2884                 break;
2885         case 0x1:
2886                 result = HSO_PORT_DIAG;
2887                 break;
2888         case 0x2:
2889                 result = HSO_PORT_GPS;
2890                 break;
2891         case 0x3:
2892                 result = HSO_PORT_GPS_CONTROL;
2893                 break;
2894         case 0x4:
2895                 result = HSO_PORT_APP;
2896                 break;
2897         case 0x5:
2898                 result = HSO_PORT_APP2;
2899                 break;
2900         case 0x6:
2901                 result = HSO_PORT_CONTROL;
2902                 break;
2903         case 0x7:
2904                 result = HSO_PORT_NETWORK;
2905                 break;
2906         case 0x8:
2907                 result = HSO_PORT_MODEM;
2908                 break;
2909         case 0x9:
2910                 result = HSO_PORT_MSD;
2911                 break;
2912         case 0xa:
2913                 result = HSO_PORT_PCSC;
2914                 break;
2915         case 0xb:
2916                 result = HSO_PORT_VOICE;
2917                 break;
2918         default:
2919                 result = 0;
2920         }
2921
2922         if (result)
2923                 result |= HSO_INTF_BULK;
2924
2925         if (config_data[16] & 0x1)
2926                 result |= HSO_INFO_CRC_BUG;
2927
2928         return result;
2929 }
2930
2931 /* called once for each interface upon device insertion */
2932 static int hso_probe(struct usb_interface *interface,
2933                      const struct usb_device_id *id)
2934 {
2935         int mux, i, if_num, port_spec;
2936         unsigned char port_mask;
2937         struct hso_device *hso_dev = NULL;
2938         struct hso_shared_int *shared_int;
2939         struct hso_device *tmp_dev = NULL;
2940
2941         if_num = interface->altsetting->desc.bInterfaceNumber;
2942
2943         /* Get the interface/port specification from either driver_info or from
2944          * the device itself */
2945         if (id->driver_info)
2946                 port_spec = ((u32 *)(id->driver_info))[if_num];
2947         else
2948                 port_spec = hso_get_config_data(interface);
2949
2950         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2951                 dev_err(&interface->dev, "Not our interface\n");
2952                 return -ENODEV;
2953         }
2954         /* Check if we need to switch to alt interfaces prior to port
2955          * configuration */
2956         if (interface->num_altsetting > 1)
2957                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2958         interface->needs_remote_wakeup = 1;
2959
2960         /* Allocate new hso device(s) */
2961         switch (port_spec & HSO_INTF_MASK) {
2962         case HSO_INTF_MUX:
2963                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2964                         /* Create the network device */
2965                         if (!disable_net) {
2966                                 hso_dev = hso_create_net_device(interface,
2967                                                                 port_spec);
2968                                 if (!hso_dev)
2969                                         goto exit;
2970                                 tmp_dev = hso_dev;
2971                         }
2972                 }
2973
2974                 if (hso_get_mux_ports(interface, &port_mask))
2975                         /* TODO: de-allocate everything */
2976                         goto exit;
2977
2978                 shared_int = hso_create_shared_int(interface);
2979                 if (!shared_int)
2980                         goto exit;
2981
2982                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2983                         if (port_mask & i) {
2984                                 hso_dev = hso_create_mux_serial_device(
2985                                                 interface, i, shared_int);
2986                                 if (!hso_dev)
2987                                         goto exit;
2988                         }
2989                 }
2990
2991                 if (tmp_dev)
2992                         hso_dev = tmp_dev;
2993                 break;
2994
2995         case HSO_INTF_BULK:
2996                 /* It's a regular bulk interface */
2997                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2998                         if (!disable_net)
2999                                 hso_dev =
3000                                     hso_create_net_device(interface, port_spec);
3001                 } else {
3002                         hso_dev =
3003                             hso_create_bulk_serial_device(interface, port_spec);
3004                 }
3005                 if (!hso_dev)
3006                         goto exit;
3007                 break;
3008         default:
3009                 goto exit;
3010         }
3011
3012         /* save our data pointer in this device */
3013         usb_set_intfdata(interface, hso_dev);
3014
3015         /* done */
3016         return 0;
3017 exit:
3018         hso_free_interface(interface);
3019         return -ENODEV;
3020 }
3021
3022 /* device removed, cleaning up */
3023 static void hso_disconnect(struct usb_interface *interface)
3024 {
3025         hso_free_interface(interface);
3026
3027         /* remove reference of our private data */
3028         usb_set_intfdata(interface, NULL);
3029 }
3030
3031 static void async_get_intf(struct work_struct *data)
3032 {
3033         struct hso_device *hso_dev =
3034             container_of(data, struct hso_device, async_get_intf);
3035         usb_autopm_get_interface(hso_dev->interface);
3036 }
3037
3038 static void async_put_intf(struct work_struct *data)
3039 {
3040         struct hso_device *hso_dev =
3041             container_of(data, struct hso_device, async_put_intf);
3042         usb_autopm_put_interface(hso_dev->interface);
3043 }
3044
3045 static int hso_get_activity(struct hso_device *hso_dev)
3046 {
3047         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3048                 if (!hso_dev->is_active) {
3049                         hso_dev->is_active = 1;
3050                         schedule_work(&hso_dev->async_get_intf);
3051                 }
3052         }
3053
3054         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3055                 return -EAGAIN;
3056
3057         usb_mark_last_busy(hso_dev->usb);
3058
3059         return 0;
3060 }
3061
3062 static int hso_put_activity(struct hso_device *hso_dev)
3063 {
3064         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3065                 if (hso_dev->is_active) {
3066                         hso_dev->is_active = 0;
3067                         schedule_work(&hso_dev->async_put_intf);
3068                         return -EAGAIN;
3069                 }
3070         }
3071         hso_dev->is_active = 0;
3072         return 0;
3073 }
3074
3075 /* called by kernel when we need to suspend device */
3076 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3077 {
3078         int i, result;
3079
3080         /* Stop all serial ports */
3081         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3082                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3083                         result = hso_stop_serial_device(serial_table[i]);
3084                         if (result)
3085                                 goto out;
3086                 }
3087         }
3088
3089         /* Stop all network ports */
3090         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3091                 if (network_table[i] &&
3092                     (network_table[i]->interface == iface)) {
3093                         result = hso_stop_net_device(network_table[i]);
3094                         if (result)
3095                                 goto out;
3096                 }
3097         }
3098
3099 out:
3100         return 0;
3101 }
3102
3103 /* called by kernel when we need to resume device */
3104 static int hso_resume(struct usb_interface *iface)
3105 {
3106         int i, result = 0;
3107         struct hso_net *hso_net;
3108
3109         /* Start all serial ports */
3110         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3111                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3112                         if (dev2ser(serial_table[i])->open_count) {
3113                                 result =
3114                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3115                                 hso_kick_transmit(dev2ser(serial_table[i]));
3116                                 if (result)
3117                                         goto out;
3118                         }
3119                 }
3120         }
3121
3122         /* Start all network ports */
3123         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3124                 if (network_table[i] &&
3125                     (network_table[i]->interface == iface)) {
3126                         hso_net = dev2net(network_table[i]);
3127                         if (hso_net->flags & IFF_UP) {
3128                                 /* First transmit any lingering data,
3129                                    then restart the device. */
3130                                 if (hso_net->skb_tx_buf) {
3131                                         dev_dbg(&iface->dev,
3132                                                 "Transmitting"
3133                                                 " lingering data\n");
3134                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3135                                                            hso_net->net);
3136                                         hso_net->skb_tx_buf = NULL;
3137                                 }
3138                                 result = hso_start_net_device(network_table[i]);
3139                                 if (result)
3140                                         goto out;
3141                         }
3142                 }
3143         }
3144
3145 out:
3146         return result;
3147 }
3148
3149 static void reset_device(struct work_struct *data)
3150 {
3151         struct hso_device *hso_dev =
3152             container_of(data, struct hso_device, reset_device);
3153         struct usb_device *usb = hso_dev->usb;
3154         int result;
3155
3156         if (hso_dev->usb_gone) {
3157                 D1("No reset during disconnect\n");
3158         } else {
3159                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3160                 if (result < 0)
3161                         D1("unable to lock device for reset: %d\n", result);
3162                 else {
3163                         usb_reset_device(usb);
3164                         usb_unlock_device(usb);
3165                 }
3166         }
3167 }
3168
3169 static void hso_serial_ref_free(struct kref *ref)
3170 {
3171         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3172
3173         hso_free_serial_device(hso_dev);
3174 }
3175
3176 static void hso_free_interface(struct usb_interface *interface)
3177 {
3178         struct hso_serial *hso_dev;
3179         struct tty_struct *tty;
3180         int i;
3181
3182         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3183                 if (serial_table[i] &&
3184                     (serial_table[i]->interface == interface)) {
3185                         hso_dev = dev2ser(serial_table[i]);
3186                         spin_lock_irq(&hso_dev->serial_lock);
3187                         tty = tty_kref_get(hso_dev->tty);
3188                         spin_unlock_irq(&hso_dev->serial_lock);
3189                         if (tty)
3190                                 tty_hangup(tty);
3191                         mutex_lock(&hso_dev->parent->mutex);
3192                         tty_kref_put(tty);
3193                         hso_dev->parent->usb_gone = 1;
3194                         mutex_unlock(&hso_dev->parent->mutex);
3195                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3196                 }
3197         }
3198
3199         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3200                 if (network_table[i] &&
3201                     (network_table[i]->interface == interface)) {
3202                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3203                         /* hso_stop_net_device doesn't stop the net queue since
3204                          * traffic needs to start it again when suspended */
3205                         netif_stop_queue(dev2net(network_table[i])->net);
3206                         hso_stop_net_device(network_table[i]);
3207                         cancel_work_sync(&network_table[i]->async_put_intf);
3208                         cancel_work_sync(&network_table[i]->async_get_intf);
3209                         if (rfk) {
3210                                 rfkill_unregister(rfk);
3211                                 rfkill_destroy(rfk);
3212                         }
3213                         hso_free_net_device(network_table[i]);
3214                 }
3215         }
3216 }
3217
3218 /* Helper functions */
3219
3220 /* Get the endpoint ! */
3221 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3222                                                   int type, int dir)
3223 {
3224         int i;
3225         struct usb_host_interface *iface = intf->cur_altsetting;
3226         struct usb_endpoint_descriptor *endp;
3227
3228         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3229                 endp = &iface->endpoint[i].desc;
3230                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3231                     (usb_endpoint_type(endp) == type))
3232                         return endp;
3233         }
3234
3235         return NULL;
3236 }
3237
3238 /* Get the byte that describes which ports are enabled */
3239 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3240 {
3241         int i;
3242         struct usb_host_interface *iface = intf->cur_altsetting;
3243
3244         if (iface->extralen == 3) {
3245                 *ports = iface->extra[2];
3246                 return 0;
3247         }
3248
3249         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3250                 if (iface->endpoint[i].extralen == 3) {
3251                         *ports = iface->endpoint[i].extra[2];
3252                         return 0;
3253                 }
3254         }
3255
3256         return -1;
3257 }
3258
3259 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3260 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3261                                    struct usb_device *usb, gfp_t gfp)
3262 {
3263         int result;
3264
3265         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3266                          usb_rcvintpipe(usb,
3267                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3268                          shared_int->shared_intr_buf,
3269                          1,
3270                          intr_callback, shared_int,
3271                          shared_int->intr_endp->bInterval);
3272
3273         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3274         if (result)
3275                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3276                         result);
3277
3278         return result;
3279 }
3280
3281 /* operations setup of the serial interface */
3282 static const struct tty_operations hso_serial_ops = {
3283         .open = hso_serial_open,
3284         .close = hso_serial_close,
3285         .write = hso_serial_write,
3286         .write_room = hso_serial_write_room,
3287         .ioctl = hso_serial_ioctl,
3288         .set_termios = hso_serial_set_termios,
3289         .chars_in_buffer = hso_serial_chars_in_buffer,
3290         .tiocmget = hso_serial_tiocmget,
3291         .tiocmset = hso_serial_tiocmset,
3292         .get_icount = hso_get_count,
3293         .unthrottle = hso_unthrottle
3294 };
3295
3296 static struct usb_driver hso_driver = {
3297         .name = driver_name,
3298         .probe = hso_probe,
3299         .disconnect = hso_disconnect,
3300         .id_table = hso_ids,
3301         .suspend = hso_suspend,
3302         .resume = hso_resume,
3303         .reset_resume = hso_resume,
3304         .supports_autosuspend = 1,
3305 };
3306
3307 static int __init hso_init(void)
3308 {
3309         int i;
3310         int result;
3311
3312         /* put it in the log */
3313         printk(KERN_INFO "hso: %s\n", version);
3314
3315         /* Initialise the serial table semaphore and table */
3316         spin_lock_init(&serial_table_lock);
33