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hso: net driver using tty without locking
[linux-2.6.git] / drivers / net / usb / hso.c
blobd345a6eec4caf2afefd1ec3774f40692af035d81
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
7 * <ajb@spheresystems.co.uk>
8 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
9 * Copyright (C) 2008 Novell, Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
23 * USA
24 *
25 *
26 *****************************************************************************/
27
28 /******************************************************************************
29 *
30 * Description of the device:
31 *
32 * Interface 0: Contains the IP network interface on the bulk end points.
33 * The multiplexed serial ports are using the interrupt and
34 * control endpoints.
35 * Interrupt contains a bitmap telling which multiplexed
36 * serialport needs servicing.
37 *
38 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
39 * port is opened, as this have a huge impact on the network port
40 * throughput.
41 *
42 * Interface 2: Standard modem interface - circuit switched interface, should
43 * not be used.
44 *
45 *****************************************************************************/
46
47 #include <linux/sched.h>
48 #include <linux/slab.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/module.h>
53 #include <linux/ethtool.h>
54 #include <linux/usb.h>
55 #include <linux/timer.h>
56 #include <linux/tty.h>
57 #include <linux/tty_driver.h>
58 #include <linux/tty_flip.h>
59 #include <linux/kmod.h>
60 #include <linux/rfkill.h>
61 #include <linux/ip.h>
62 #include <linux/uaccess.h>
63 #include <linux/usb/cdc.h>
64 #include <net/arp.h>
65 #include <asm/byteorder.h>
66
67
68 #define DRIVER_VERSION "1.2"
69 #define MOD_AUTHOR "Option Wireless"
70 #define MOD_DESCRIPTION "USB High Speed Option driver"
71 #define MOD_LICENSE "GPL"
72
73 #define HSO_MAX_NET_DEVICES 10
74 #define HSO__MAX_MTU 2048
75 #define DEFAULT_MTU 1500
76 #define DEFAULT_MRU 1500
77
78 #define CTRL_URB_RX_SIZE 1024
79 #define CTRL_URB_TX_SIZE 64
80
81 #define BULK_URB_RX_SIZE 4096
82 #define BULK_URB_TX_SIZE 8192
83
84 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
85 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
86 #define MUX_BULK_RX_BUF_COUNT 4
87 #define USB_TYPE_OPTION_VENDOR 0x20
88
89 /* These definitions are used with the struct hso_net flags element */
90 /* - use *_bit operations on it. (bit indices not values.) */
91 #define HSO_NET_RUNNING 0
92
93 #define HSO_NET_TX_TIMEOUT (HZ*10)
94
95 #define HSO_SERIAL_MAGIC 0x48534f31
96
97 /* Number of ttys to handle */
98 #define HSO_SERIAL_TTY_MINORS 256
99
100 #define MAX_RX_URBS 2
101
102 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
103 {
104 if (tty)
105 return tty->driver_data;
106 return NULL;
107 }
108
109 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118 #define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124 #define D1(args...) D_(0x01, ##args)
125 #define D2(args...) D_(0x02, ##args)
126 #define D3(args...) D_(0x04, ##args)
127 #define D4(args...) D_(0x08, ##args)
128 #define D5(args...) D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 struct hso_serial {
186 struct hso_device *parent;
187 int magic;
188 u8 minor;
189
190 struct hso_shared_int *shared_int;
191
192 /* rx/tx urb could be either a bulk urb or a control urb depending
193 on which serial port it is used on. */
194 struct urb *rx_urb[MAX_RX_URBS];
195 u8 num_rx_urbs;
196 u8 *rx_data[MAX_RX_URBS];
197 u16 rx_data_length; /* should contain allocated length */
198
199 struct urb *tx_urb;
200 u8 *tx_data;
201 u8 *tx_buffer;
202 u16 tx_data_length; /* should contain allocated length */
203 u16 tx_data_count;
204 u16 tx_buffer_count;
205 struct usb_ctrlrequest ctrl_req_tx;
206 struct usb_ctrlrequest ctrl_req_rx;
207
208 struct usb_endpoint_descriptor *in_endp;
209 struct usb_endpoint_descriptor *out_endp;
210
211 enum rx_ctrl_state rx_state;
212 u8 rts_state;
213 u8 dtr_state;
214 unsigned tx_urb_used:1;
215
216 /* from usb_serial_port */
217 struct tty_struct *tty;
218 int open_count;
219 spinlock_t serial_lock;
220
221 int (*write_data) (struct hso_serial *serial);
222 /* Hacks required to get flow control
223 * working on the serial receive buffers
224 * so as not to drop characters on the floor.
225 */
226 int curr_rx_urb_idx;
227 u16 curr_rx_urb_offset;
228 u8 rx_urb_filled[MAX_RX_URBS];
229 struct tasklet_struct unthrottle_tasklet;
230 struct work_struct retry_unthrottle_workqueue;
231 };
232
233 struct hso_device {
234 union {
235 struct hso_serial *dev_serial;
236 struct hso_net *dev_net;
237 } port_data;
238
239 u32 port_spec;
240
241 u8 is_active;
242 u8 usb_gone;
243 struct work_struct async_get_intf;
244 struct work_struct async_put_intf;
245
246 struct usb_device *usb;
247 struct usb_interface *interface;
248
249 struct device *dev;
250 struct kref ref;
251 struct mutex mutex;
252 };
253
254 /* Type of interface */
255 #define HSO_INTF_MASK 0xFF00
256 #define HSO_INTF_MUX 0x0100
257 #define HSO_INTF_BULK 0x0200
258
259 /* Type of port */
260 #define HSO_PORT_MASK 0xFF
261 #define HSO_PORT_NO_PORT 0x0
262 #define HSO_PORT_CONTROL 0x1
263 #define HSO_PORT_APP 0x2
264 #define HSO_PORT_GPS 0x3
265 #define HSO_PORT_PCSC 0x4
266 #define HSO_PORT_APP2 0x5
267 #define HSO_PORT_GPS_CONTROL 0x6
268 #define HSO_PORT_MSD 0x7
269 #define HSO_PORT_VOICE 0x8
270 #define HSO_PORT_DIAG2 0x9
271 #define HSO_PORT_DIAG 0x10
272 #define HSO_PORT_MODEM 0x11
273 #define HSO_PORT_NETWORK 0x12
274
275 /* Additional device info */
276 #define HSO_INFO_MASK 0xFF000000
277 #define HSO_INFO_CRC_BUG 0x01000000
278
279 /*****************************************************************************/
280 /* Prototypes */
281 /*****************************************************************************/
282 /* Serial driver functions */
283 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
284 unsigned int set, unsigned int clear);
285 static void ctrl_callback(struct urb *urb);
286 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
287 static void hso_kick_transmit(struct hso_serial *serial);
288 /* Helper functions */
289 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
290 struct usb_device *usb, gfp_t gfp);
291 static void log_usb_status(int status, const char *function);
292 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
293 int type, int dir);
294 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
295 static void hso_free_interface(struct usb_interface *intf);
296 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
297 static int hso_stop_serial_device(struct hso_device *hso_dev);
298 static int hso_start_net_device(struct hso_device *hso_dev);
299 static void hso_free_shared_int(struct hso_shared_int *shared_int);
300 static int hso_stop_net_device(struct hso_device *hso_dev);
301 static void hso_serial_ref_free(struct kref *ref);
302 static void hso_std_serial_read_bulk_callback(struct urb *urb);
303 static int hso_mux_serial_read(struct hso_serial *serial);
304 static void async_get_intf(struct work_struct *data);
305 static void async_put_intf(struct work_struct *data);
306 static int hso_put_activity(struct hso_device *hso_dev);
307 static int hso_get_activity(struct hso_device *hso_dev);
308
309 /*****************************************************************************/
310 /* Helping functions */
311 /*****************************************************************************/
312
313 /* #define DEBUG */
314
315 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
316 {
317 return hso_dev->port_data.dev_net;
318 }
319
320 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
321 {
322 return hso_dev->port_data.dev_serial;
323 }
324
325 /* Debugging functions */
326 #ifdef DEBUG
327 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
328 unsigned int len)
329 {
330 static char name[255];
331
332 sprintf(name, "hso[%d:%s]", line_count, func_name);
333 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
334 }
335
336 #define DUMP(buf_, len_) \
337 dbg_dump(__LINE__, __func__, buf_, len_)
338
339 #define DUMP1(buf_, len_) \
340 do { \
341 if (0x01 & debug) \
342 DUMP(buf_, len_); \
343 } while (0)
344 #else
345 #define DUMP(buf_, len_)
346 #define DUMP1(buf_, len_)
347 #endif
348
349 /* module parameters */
350 static int debug;
351 static int tty_major;
352 static int disable_net;
353
354 /* driver info */
355 static const char driver_name[] = "hso";
356 static const char tty_filename[] = "ttyHS";
357 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
358 /* the usb driver itself (registered in hso_init) */
359 static struct usb_driver hso_driver;
360 /* serial structures */
361 static struct tty_driver *tty_drv;
362 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
363 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
364 static spinlock_t serial_table_lock;
365 static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
366 static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
367
368 static const s32 default_port_spec[] = {
369 HSO_INTF_MUX | HSO_PORT_NETWORK,
370 HSO_INTF_BULK | HSO_PORT_DIAG,
371 HSO_INTF_BULK | HSO_PORT_MODEM,
372 0
373 };
374
375 static const s32 icon321_port_spec[] = {
376 HSO_INTF_MUX | HSO_PORT_NETWORK,
377 HSO_INTF_BULK | HSO_PORT_DIAG2,
378 HSO_INTF_BULK | HSO_PORT_MODEM,
379 HSO_INTF_BULK | HSO_PORT_DIAG,
380 0
381 };
382
383 #define default_port_device(vendor, product) \
384 USB_DEVICE(vendor, product), \
385 .driver_info = (kernel_ulong_t)default_port_spec
386
387 #define icon321_port_device(vendor, product) \
388 USB_DEVICE(vendor, product), \
389 .driver_info = (kernel_ulong_t)icon321_port_spec
390
391 /* list of devices we support */
392 static const struct usb_device_id hso_ids[] = {
393 {default_port_device(0x0af0, 0x6711)},
394 {default_port_device(0x0af0, 0x6731)},
395 {default_port_device(0x0af0, 0x6751)},
396 {default_port_device(0x0af0, 0x6771)},
397 {default_port_device(0x0af0, 0x6791)},
398 {default_port_device(0x0af0, 0x6811)},
399 {default_port_device(0x0af0, 0x6911)},
400 {default_port_device(0x0af0, 0x6951)},
401 {default_port_device(0x0af0, 0x6971)},
402 {default_port_device(0x0af0, 0x7011)},
403 {default_port_device(0x0af0, 0x7031)},
404 {default_port_device(0x0af0, 0x7051)},
405 {default_port_device(0x0af0, 0x7071)},
406 {default_port_device(0x0af0, 0x7111)},
407 {default_port_device(0x0af0, 0x7211)},
408 {default_port_device(0x0af0, 0x7251)},
409 {default_port_device(0x0af0, 0x7271)},
410 {default_port_device(0x0af0, 0x7311)},
411 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
412 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
413 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
414 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
415 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
416 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
417 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
418 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
419 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
420 {USB_DEVICE(0x0af0, 0x7701)},
421 {USB_DEVICE(0x0af0, 0x7801)},
422 {USB_DEVICE(0x0af0, 0x7901)},
423 {USB_DEVICE(0x0af0, 0x7361)},
424 {icon321_port_device(0x0af0, 0xd051)},
425 {}
426 };
427 MODULE_DEVICE_TABLE(usb, hso_ids);
428
429 /* Sysfs attribute */
430 static ssize_t hso_sysfs_show_porttype(struct device *dev,
431 struct device_attribute *attr,
432 char *buf)
433 {
434 struct hso_device *hso_dev = dev->driver_data;
435 char *port_name;
436
437 if (!hso_dev)
438 return 0;
439
440 switch (hso_dev->port_spec & HSO_PORT_MASK) {
441 case HSO_PORT_CONTROL:
442 port_name = "Control";
443 break;
444 case HSO_PORT_APP:
445 port_name = "Application";
446 break;
447 case HSO_PORT_APP2:
448 port_name = "Application2";
449 break;
450 case HSO_PORT_GPS:
451 port_name = "GPS";
452 break;
453 case HSO_PORT_GPS_CONTROL:
454 port_name = "GPS Control";
455 break;
456 case HSO_PORT_PCSC:
457 port_name = "PCSC";
458 break;
459 case HSO_PORT_DIAG:
460 port_name = "Diagnostic";
461 break;
462 case HSO_PORT_DIAG2:
463 port_name = "Diagnostic2";
464 break;
465 case HSO_PORT_MODEM:
466 port_name = "Modem";
467 break;
468 case HSO_PORT_NETWORK:
469 port_name = "Network";
470 break;
471 default:
472 port_name = "Unknown";
473 break;
474 }
475
476 return sprintf(buf, "%s\n", port_name);
477 }
478 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
479
480 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
481 {
482 int idx;
483
484 for (idx = 0; idx < serial->num_rx_urbs; idx++)
485 if (serial->rx_urb[idx] == urb)
486 return idx;
487 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
488 return -1;
489 }
490
491 /* converts mux value to a port spec value */
492 static u32 hso_mux_to_port(int mux)
493 {
494 u32 result;
495
496 switch (mux) {
497 case 0x1:
498 result = HSO_PORT_CONTROL;
499 break;
500 case 0x2:
501 result = HSO_PORT_APP;
502 break;
503 case 0x4:
504 result = HSO_PORT_PCSC;
505 break;
506 case 0x8:
507 result = HSO_PORT_GPS;
508 break;
509 case 0x10:
510 result = HSO_PORT_APP2;
511 break;
512 default:
513 result = HSO_PORT_NO_PORT;
514 }
515 return result;
516 }
517
518 /* converts port spec value to a mux value */
519 static u32 hso_port_to_mux(int port)
520 {
521 u32 result;
522
523 switch (port & HSO_PORT_MASK) {
524 case HSO_PORT_CONTROL:
525 result = 0x0;
526 break;
527 case HSO_PORT_APP:
528 result = 0x1;
529 break;
530 case HSO_PORT_PCSC:
531 result = 0x2;
532 break;
533 case HSO_PORT_GPS:
534 result = 0x3;
535 break;
536 case HSO_PORT_APP2:
537 result = 0x4;
538 break;
539 default:
540 result = 0x0;
541 }
542 return result;
543 }
544
545 static struct hso_serial *get_serial_by_shared_int_and_type(
546 struct hso_shared_int *shared_int,
547 int mux)
548 {
549 int i, port;
550
551 port = hso_mux_to_port(mux);
552
553 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
554 if (serial_table[i]
555 && (dev2ser(serial_table[i])->shared_int == shared_int)
556 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
557 return dev2ser(serial_table[i]);
558 }
559 }
560
561 return NULL;
562 }
563
564 static struct hso_serial *get_serial_by_index(unsigned index)
565 {
566 struct hso_serial *serial = NULL;
567 unsigned long flags;
568
569 spin_lock_irqsave(&serial_table_lock, flags);
570 if (serial_table[index])
571 serial = dev2ser(serial_table[index]);
572 spin_unlock_irqrestore(&serial_table_lock, flags);
573
574 return serial;
575 }
576
577 static int get_free_serial_index(void)
578 {
579 int index;
580 unsigned long flags;
581
582 spin_lock_irqsave(&serial_table_lock, flags);
583 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
584 if (serial_table[index] == NULL) {
585 spin_unlock_irqrestore(&serial_table_lock, flags);
586 return index;
587 }
588 }
589 spin_unlock_irqrestore(&serial_table_lock, flags);
590
591 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
592 return -1;
593 }
594
595 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
596 {
597 unsigned long flags;
598
599 spin_lock_irqsave(&serial_table_lock, flags);
600 if (serial)
601 serial_table[index] = serial->parent;
602 else
603 serial_table[index] = NULL;
604 spin_unlock_irqrestore(&serial_table_lock, flags);
605 }
606
607 /* log a meaningful explanation of an USB status */
608 static void log_usb_status(int status, const char *function)
609 {
610 char *explanation;
611
612 switch (status) {
613 case -ENODEV:
614 explanation = "no device";
615 break;
616 case -ENOENT:
617 explanation = "endpoint not enabled";
618 break;
619 case -EPIPE:
620 explanation = "endpoint stalled";
621 break;
622 case -ENOSPC:
623 explanation = "not enough bandwidth";
624 break;
625 case -ESHUTDOWN:
626 explanation = "device disabled";
627 break;
628 case -EHOSTUNREACH:
629 explanation = "device suspended";
630 break;
631 case -EINVAL:
632 case -EAGAIN:
633 case -EFBIG:
634 case -EMSGSIZE:
635 explanation = "internal error";
636 break;
637 default:
638 explanation = "unknown status";
639 break;
640 }
641 D1("%s: received USB status - %s (%d)", function, explanation, status);
642 }
643
644 /* Network interface functions */
645
646 /* called when net interface is brought up by ifconfig */
647 static int hso_net_open(struct net_device *net)
648 {
649 struct hso_net *odev = netdev_priv(net);
650 unsigned long flags = 0;
651
652 if (!odev) {
653 dev_err(&net->dev, "No net device !\n");
654 return -ENODEV;
655 }
656
657 odev->skb_tx_buf = NULL;
658
659 /* setup environment */
660 spin_lock_irqsave(&odev->net_lock, flags);
661 odev->rx_parse_state = WAIT_IP;
662 odev->rx_buf_size = 0;
663 odev->rx_buf_missing = sizeof(struct iphdr);
664 spin_unlock_irqrestore(&odev->net_lock, flags);
665
666 /* We are up and running. */
667 set_bit(HSO_NET_RUNNING, &odev->flags);
668 hso_start_net_device(odev->parent);
669
670 /* Tell the kernel we are ready to start receiving from it */
671 netif_start_queue(net);
672
673 return 0;
674 }
675
676 /* called when interface is brought down by ifconfig */
677 static int hso_net_close(struct net_device *net)
678 {
679 struct hso_net *odev = netdev_priv(net);
680
681 /* we don't need the queue anymore */
682 netif_stop_queue(net);
683 /* no longer running */
684 clear_bit(HSO_NET_RUNNING, &odev->flags);
685
686 hso_stop_net_device(odev->parent);
687
688 /* done */
689 return 0;
690 }
691
692 /* USB tells is xmit done, we should start the netqueue again */
693 static void write_bulk_callback(struct urb *urb)
694 {
695 struct hso_net *odev = urb->context;
696 int status = urb->status;
697
698 /* Sanity check */
699 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
700 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
701 return;
702 }
703
704 /* Do we still have a valid kernel network device? */
705 if (!netif_device_present(odev->net)) {
706 dev_err(&urb->dev->dev, "%s: net device not present\n",
707 __func__);
708 return;
709 }
710
711 /* log status, but don't act on it, we don't need to resubmit anything
712 * anyhow */
713 if (status)
714 log_usb_status(status, __func__);
715
716 hso_put_activity(odev->parent);
717
718 /* Tell the network interface we are ready for another frame */
719 netif_wake_queue(odev->net);
720 }
721
722 /* called by kernel when we need to transmit a packet */
723 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
724 {
725 struct hso_net *odev = netdev_priv(net);
726 int result;
727
728 /* Tell the kernel, "No more frames 'til we are done with this one." */
729 netif_stop_queue(net);
730 if (hso_get_activity(odev->parent) == -EAGAIN) {
731 odev->skb_tx_buf = skb;
732 return 0;
733 }
734
735 /* log if asked */
736 DUMP1(skb->data, skb->len);
737 /* Copy it from kernel memory to OUR memory */
738 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
739 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
740
741 /* Fill in the URB for shipping it out. */
742 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
743 odev->parent->usb,
744 usb_sndbulkpipe(odev->parent->usb,
745 odev->out_endp->
746 bEndpointAddress & 0x7F),
747 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
748 odev);
749
750 /* Deal with the Zero Length packet problem, I hope */
751 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
752
753 /* Send the URB on its merry way. */
754 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
755 if (result) {
756 dev_warn(&odev->parent->interface->dev,
757 "failed mux_bulk_tx_urb %d", result);
758 net->stats.tx_errors++;
759 netif_start_queue(net);
760 } else {
761 net->stats.tx_packets++;
762 net->stats.tx_bytes += skb->len;
763 /* And tell the kernel when the last transmit started. */
764 net->trans_start = jiffies;
765 }
766 dev_kfree_skb(skb);
767 /* we're done */
768 return result;
769 }
770
771 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
772 {
773 struct hso_net *odev = netdev_priv(net);
774
775 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
776 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
777 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
778 }
779
780 static struct ethtool_ops ops = {
781 .get_drvinfo = hso_get_drvinfo,
782 .get_link = ethtool_op_get_link
783 };
784
785 /* called when a packet did not ack after watchdogtimeout */
786 static void hso_net_tx_timeout(struct net_device *net)
787 {
788 struct hso_net *odev = netdev_priv(net);
789
790 if (!odev)
791 return;
792
793 /* Tell syslog we are hosed. */
794 dev_warn(&net->dev, "Tx timed out.\n");
795
796 /* Tear the waiting frame off the list */
797 if (odev->mux_bulk_tx_urb
798 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
799 usb_unlink_urb(odev->mux_bulk_tx_urb);
800
801 /* Update statistics */
802 net->stats.tx_errors++;
803 }
804
805 /* make a real packet from the received USB buffer */
806 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
807 unsigned int count, unsigned char is_eop)
808 {
809 unsigned short temp_bytes;
810 unsigned short buffer_offset = 0;
811 unsigned short frame_len;
812 unsigned char *tmp_rx_buf;
813
814 /* log if needed */
815 D1("Rx %d bytes", count);
816 DUMP(ip_pkt, min(128, (int)count));
817
818 while (count) {
819 switch (odev->rx_parse_state) {
820 case WAIT_IP:
821 /* waiting for IP header. */
822 /* wanted bytes - size of ip header */
823 temp_bytes =
824 (count <
825 odev->rx_buf_missing) ? count : odev->
826 rx_buf_missing;
827
828 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
829 odev->rx_buf_size, ip_pkt + buffer_offset,
830 temp_bytes);
831
832 odev->rx_buf_size += temp_bytes;
833 buffer_offset += temp_bytes;
834 odev->rx_buf_missing -= temp_bytes;
835 count -= temp_bytes;
836
837 if (!odev->rx_buf_missing) {
838 /* header is complete allocate an sk_buffer and
839 * continue to WAIT_DATA */
840 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
841
842 if ((frame_len > DEFAULT_MRU) ||
843 (frame_len < sizeof(struct iphdr))) {
844 dev_err(&odev->net->dev,
845 "Invalid frame (%d) length\n",
846 frame_len);
847 odev->rx_parse_state = WAIT_SYNC;
848 continue;
849 }
850 /* Allocate an sk_buff */
851 odev->skb_rx_buf = dev_alloc_skb(frame_len);
852 if (!odev->skb_rx_buf) {
853 /* We got no receive buffer. */
854 D1("could not allocate memory");
855 odev->rx_parse_state = WAIT_SYNC;
856 return;
857 }
858 /* Here's where it came from */
859 odev->skb_rx_buf->dev = odev->net;
860
861 /* Copy what we got so far. make room for iphdr
862 * after tail. */
863 tmp_rx_buf =
864 skb_put(odev->skb_rx_buf,
865 sizeof(struct iphdr));
866 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
867 sizeof(struct iphdr));
868
869 /* ETH_HLEN */
870 odev->rx_buf_size = sizeof(struct iphdr);
871
872 /* Filip actually use .tot_len */
873 odev->rx_buf_missing =
874 frame_len - sizeof(struct iphdr);
875 odev->rx_parse_state = WAIT_DATA;
876 }
877 break;
878
879 case WAIT_DATA:
880 temp_bytes = (count < odev->rx_buf_missing)
881 ? count : odev->rx_buf_missing;
882
883 /* Copy the rest of the bytes that are left in the
884 * buffer into the waiting sk_buf. */
885 /* Make room for temp_bytes after tail. */
886 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
887 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
888
889 odev->rx_buf_missing -= temp_bytes;
890 count -= temp_bytes;
891 buffer_offset += temp_bytes;
892 odev->rx_buf_size += temp_bytes;
893 if (!odev->rx_buf_missing) {
894 /* Packet is complete. Inject into stack. */
895 /* We have IP packet here */
896 odev->skb_rx_buf->protocol =
897 __constant_htons(ETH_P_IP);
898 /* don't check it */
899 odev->skb_rx_buf->ip_summed =
900 CHECKSUM_UNNECESSARY;
901
902 skb_reset_mac_header(odev->skb_rx_buf);
903
904 /* Ship it off to the kernel */
905 netif_rx(odev->skb_rx_buf);
906 /* No longer our buffer. */
907 odev->skb_rx_buf = NULL;
908
909 /* update out statistics */
910 odev->net->stats.rx_packets++;
911
912 odev->net->stats.rx_bytes += odev->rx_buf_size;
913
914 odev->rx_buf_size = 0;
915 odev->rx_buf_missing = sizeof(struct iphdr);
916 odev->rx_parse_state = WAIT_IP;
917 }
918 break;
919
920 case WAIT_SYNC:
921 D1(" W_S");
922 count = 0;
923 break;
924 default:
925 D1(" ");
926 count--;
927 break;
928 }
929 }
930
931 /* Recovery mechanism for WAIT_SYNC state. */
932 if (is_eop) {
933 if (odev->rx_parse_state == WAIT_SYNC) {
934 odev->rx_parse_state = WAIT_IP;
935 odev->rx_buf_size = 0;
936 odev->rx_buf_missing = sizeof(struct iphdr);
937 }
938 }
939 }
940
941 /* Moving data from usb to kernel (in interrupt state) */
942 static void read_bulk_callback(struct urb *urb)
943 {
944 struct hso_net *odev = urb->context;
945 struct net_device *net;
946 int result;
947 int status = urb->status;
948
949 /* is al ok? (Filip: Who's Al ?) */
950 if (status) {
951 log_usb_status(status, __func__);
952 return;
953 }
954
955 /* Sanity check */
956 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
957 D1("BULK IN callback but driver is not active!");
958 return;
959 }
960 usb_mark_last_busy(urb->dev);
961
962 net = odev->net;
963
964 if (!netif_device_present(net)) {
965 /* Somebody killed our network interface... */
966 return;
967 }
968
969 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
970 u32 rest;
971 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
972 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
973 if (((rest == 5) || (rest == 6))
974 && !memcmp(((u8 *) urb->transfer_buffer) +
975 urb->actual_length - 4, crc_check, 4)) {
976 urb->actual_length -= 4;
977 }
978 }
979
980 /* do we even have a packet? */
981 if (urb->actual_length) {
982 /* Handle the IP stream, add header and push it onto network
983 * stack if the packet is complete. */
984 spin_lock(&odev->net_lock);
985 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
986 (urb->transfer_buffer_length >
987 urb->actual_length) ? 1 : 0);
988 spin_unlock(&odev->net_lock);
989 }
990
991 /* We are done with this URB, resubmit it. Prep the USB to wait for
992 * another frame. Reuse same as received. */
993 usb_fill_bulk_urb(urb,
994 odev->parent->usb,
995 usb_rcvbulkpipe(odev->parent->usb,
996 odev->in_endp->
997 bEndpointAddress & 0x7F),
998 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
999 read_bulk_callback, odev);
1000
1001 /* Give this to the USB subsystem so it can tell us when more data
1002 * arrives. */
1003 result = usb_submit_urb(urb, GFP_ATOMIC);
1004 if (result)
1005 dev_warn(&odev->parent->interface->dev,
1006 "%s failed submit mux_bulk_rx_urb %d", __func__,
1007 result);
1008 }
1009
1010 /* Serial driver functions */
1011
1012 static void _hso_serial_set_termios(struct tty_struct *tty,
1013 struct ktermios *old)
1014 {
1015 struct hso_serial *serial = get_serial_by_tty(tty);
1016 struct ktermios *termios;
1017
1018 if (!serial) {
1019 printk(KERN_ERR "%s: no tty structures", __func__);
1020 return;
1021 }
1022
1023 D4("port %d", serial->minor);
1024
1025 /*
1026 * The default requirements for this device are:
1027 */
1028 termios = tty->termios;
1029 termios->c_iflag &=
1030 ~(IGNBRK /* disable ignore break */
1031 | BRKINT /* disable break causes interrupt */
1032 | PARMRK /* disable mark parity errors */
1033 | ISTRIP /* disable clear high bit of input characters */
1034 | INLCR /* disable translate NL to CR */
1035 | IGNCR /* disable ignore CR */
1036 | ICRNL /* disable translate CR to NL */
1037 | IXON); /* disable enable XON/XOFF flow control */
1038
1039 /* disable postprocess output characters */
1040 termios->c_oflag &= ~OPOST;
1041
1042 termios->c_lflag &=
1043 ~(ECHO /* disable echo input characters */
1044 | ECHONL /* disable echo new line */
1045 | ICANON /* disable erase, kill, werase, and rprnt
1046 special characters */
1047 | ISIG /* disable interrupt, quit, and suspend special
1048 characters */
1049 | IEXTEN); /* disable non-POSIX special characters */
1050
1051 termios->c_cflag &=
1052 ~(CSIZE /* no size */
1053 | PARENB /* disable parity bit */
1054 | CBAUD /* clear current baud rate */
1055 | CBAUDEX); /* clear current buad rate */
1056
1057 termios->c_cflag |= CS8; /* character size 8 bits */
1058
1059 /* baud rate 115200 */
1060 tty_encode_baud_rate(tty, 115200, 115200);
1061
1062 /*
1063 * Force low_latency on; otherwise the pushes are scheduled;
1064 * this is bad as it opens up the possibility of dropping bytes
1065 * on the floor. We don't want to drop bytes on the floor. :)
1066 */
1067 tty->low_latency = 1;
1068 return;
1069 }
1070
1071 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1072 {
1073 int result;
1074 #ifdef CONFIG_HSO_AUTOPM
1075 usb_mark_last_busy(urb->dev);
1076 #endif
1077 /* We are done with this URB, resubmit it. Prep the USB to wait for
1078 * another frame */
1079 usb_fill_bulk_urb(urb, serial->parent->usb,
1080 usb_rcvbulkpipe(serial->parent->usb,
1081 serial->in_endp->
1082 bEndpointAddress & 0x7F),
1083 urb->transfer_buffer, serial->rx_data_length,
1084 hso_std_serial_read_bulk_callback, serial);
1085 /* Give this to the USB subsystem so it can tell us when more data
1086 * arrives. */
1087 result = usb_submit_urb(urb, GFP_ATOMIC);
1088 if (result) {
1089 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1090 __func__, result);
1091 }
1092 }
1093
1094
1095
1096
1097 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1098 {
1099 int count;
1100 struct urb *curr_urb;
1101
1102 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1103 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1104 count = put_rxbuf_data(curr_urb, serial);
1105 if (count == -1)
1106 return;
1107 if (count == 0) {
1108 serial->curr_rx_urb_idx++;
1109 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1110 serial->curr_rx_urb_idx = 0;
1111 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1112 }
1113 }
1114 }
1115
1116 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1117 {
1118 int count = 0;
1119 struct urb *urb;
1120
1121 urb = serial->rx_urb[0];
1122 if (serial->open_count > 0) {
1123 count = put_rxbuf_data(urb, serial);
1124 if (count == -1)
1125 return;
1126 }
1127 /* Re issue a read as long as we receive data. */
1128
1129 if (count == 0 && ((urb->actual_length != 0) ||
1130 (serial->rx_state == RX_PENDING))) {
1131 serial->rx_state = RX_SENT;
1132 hso_mux_serial_read(serial);
1133 } else
1134 serial->rx_state = RX_IDLE;
1135 }
1136
1137
1138 /* read callback for Diag and CS port */
1139 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1140 {
1141 struct hso_serial *serial = urb->context;
1142 int status = urb->status;
1143
1144 /* sanity check */
1145 if (!serial) {
1146 D1("serial == NULL");
1147 return;
1148 } else if (status) {
1149 log_usb_status(status, __func__);
1150 return;
1151 }
1152
1153 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1154 D1("Actual length = %d\n", urb->actual_length);
1155 DUMP1(urb->transfer_buffer, urb->actual_length);
1156
1157 /* Anyone listening? */
1158 if (serial->open_count == 0)
1159 return;
1160
1161 if (status == 0) {
1162 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1163 u32 rest;
1164 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1165 rest =
1166 urb->actual_length %
1167 serial->in_endp->wMaxPacketSize;
1168 if (((rest == 5) || (rest == 6))
1169 && !memcmp(((u8 *) urb->transfer_buffer) +
1170 urb->actual_length - 4, crc_check, 4)) {
1171 urb->actual_length -= 4;
1172 }
1173 }
1174 /* Valid data, handle RX data */
1175 spin_lock(&serial->serial_lock);
1176 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1177 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1178 spin_unlock(&serial->serial_lock);
1179 } else if (status == -ENOENT || status == -ECONNRESET) {
1180 /* Unlinked - check for throttled port. */
1181 D2("Port %d, successfully unlinked urb", serial->minor);
1182 spin_lock(&serial->serial_lock);
1183 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1184 hso_resubmit_rx_bulk_urb(serial, urb);
1185 spin_unlock(&serial->serial_lock);
1186 } else {
1187 D2("Port %d, status = %d for read urb", serial->minor, status);
1188 return;
1189 }
1190 }
1191
1192 /*
1193 * This needs to be a tasklet otherwise we will
1194 * end up recursively calling this function.
1195 */
1196 void hso_unthrottle_tasklet(struct hso_serial *serial)
1197 {
1198 unsigned long flags;
1199
1200 spin_lock_irqsave(&serial->serial_lock, flags);
1201 if ((serial->parent->port_spec & HSO_INTF_MUX))
1202 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1203 else
1204 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1205 spin_unlock_irqrestore(&serial->serial_lock, flags);
1206 }
1207
1208 static void hso_unthrottle(struct tty_struct *tty)
1209 {
1210 struct hso_serial *serial = get_serial_by_tty(tty);
1211
1212 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1213 }
1214
1215 void hso_unthrottle_workfunc(struct work_struct *work)
1216 {
1217 struct hso_serial *serial =
1218 container_of(work, struct hso_serial,
1219 retry_unthrottle_workqueue);
1220 hso_unthrottle_tasklet(serial);
1221 }
1222
1223 /* open the requested serial port */
1224 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1225 {
1226 struct hso_serial *serial = get_serial_by_index(tty->index);
1227 int result;
1228
1229 /* sanity check */
1230 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1231 WARN_ON(1);
1232 tty->driver_data = NULL;
1233 D1("Failed to open port");
1234 return -ENODEV;
1235 }
1236
1237 mutex_lock(&serial->parent->mutex);
1238 result = usb_autopm_get_interface(serial->parent->interface);
1239 if (result < 0)
1240 goto err_out;
1241
1242 D1("Opening %d", serial->minor);
1243 kref_get(&serial->parent->ref);
1244
1245 /* setup */
1246 spin_lock_irq(&serial->serial_lock);
1247 tty->driver_data = serial;
1248 serial->tty = tty_kref_get(tty);
1249 spin_unlock_irq(&serial->serial_lock);
1250
1251 /* check for port already opened, if not set the termios */
1252 serial->open_count++;
1253 if (serial->open_count == 1) {
1254 tty->low_latency = 1;
1255 serial->rx_state = RX_IDLE;
1256 /* Force default termio settings */
1257 _hso_serial_set_termios(tty, NULL);
1258 tasklet_init(&serial->unthrottle_tasklet,
1259 (void (*)(unsigned long))hso_unthrottle_tasklet,
1260 (unsigned long)serial);
1261 INIT_WORK(&serial->retry_unthrottle_workqueue,
1262 hso_unthrottle_workfunc);
1263 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1264 if (result) {
1265 hso_stop_serial_device(serial->parent);
1266 serial->open_count--;
1267 kref_put(&serial->parent->ref, hso_serial_ref_free);
1268 }
1269 } else {
1270 D1("Port was already open");
1271 }
1272
1273 usb_autopm_put_interface(serial->parent->interface);
1274
1275 /* done */
1276 if (result)
1277 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1278 err_out:
1279 mutex_unlock(&serial->parent->mutex);
1280 return result;
1281 }
1282
1283 /* close the requested serial port */
1284 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1285 {
1286 struct hso_serial *serial = tty->driver_data;
1287 u8 usb_gone;
1288
1289 D1("Closing serial port");
1290
1291 /* Open failed, no close cleanup required */
1292 if (serial == NULL)
1293 return;
1294
1295 mutex_lock(&serial->parent->mutex);
1296 usb_gone = serial->parent->usb_gone;
1297
1298 if (!usb_gone)
1299 usb_autopm_get_interface(serial->parent->interface);
1300
1301 /* reset the rts and dtr */
1302 /* do the actual close */
1303 serial->open_count--;
1304 kref_put(&serial->parent->ref, hso_serial_ref_free);
1305 if (serial->open_count <= 0) {
1306 serial->open_count = 0;
1307 spin_lock_irq(&serial->serial_lock);
1308 if (serial->tty == tty) {
1309 serial->tty->driver_data = NULL;
1310 serial->tty = NULL;
1311 tty_kref_put(tty);
1312 }
1313 spin_unlock_irq(&serial->serial_lock);
1314 if (!usb_gone)
1315 hso_stop_serial_device(serial->parent);
1316 tasklet_kill(&serial->unthrottle_tasklet);
1317 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1318 }
1319
1320 if (!usb_gone)
1321 usb_autopm_put_interface(serial->parent->interface);
1322
1323 mutex_unlock(&serial->parent->mutex);
1324 }
1325
1326 /* close the requested serial port */
1327 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1328 int count)
1329 {
1330 struct hso_serial *serial = get_serial_by_tty(tty);
1331 int space, tx_bytes;
1332 unsigned long flags;
1333
1334 /* sanity check */
1335 if (serial == NULL) {
1336 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1337 return -ENODEV;
1338 }
1339
1340 spin_lock_irqsave(&serial->serial_lock, flags);
1341
1342 space = serial->tx_data_length - serial->tx_buffer_count;
1343 tx_bytes = (count < space) ? count : space;
1344
1345 if (!tx_bytes)
1346 goto out;
1347
1348 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1349 serial->tx_buffer_count += tx_bytes;
1350
1351 out:
1352 spin_unlock_irqrestore(&serial->serial_lock, flags);
1353
1354 hso_kick_transmit(serial);
1355 /* done */
1356 return tx_bytes;
1357 }
1358
1359 /* how much room is there for writing */
1360 static int hso_serial_write_room(struct tty_struct *tty)
1361 {
1362 struct hso_serial *serial = get_serial_by_tty(tty);
1363 int room;
1364 unsigned long flags;
1365
1366 spin_lock_irqsave(&serial->serial_lock, flags);
1367 room = serial->tx_data_length - serial->tx_buffer_count;
1368 spin_unlock_irqrestore(&serial->serial_lock, flags);
1369
1370 /* return free room */
1371 return room;
1372 }
1373
1374 /* setup the term */
1375 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1376 {
1377 struct hso_serial *serial = get_serial_by_tty(tty);
1378 unsigned long flags;
1379
1380 if (old)
1381 D5("Termios called with: cflags new[%d] - old[%d]",
1382 tty->termios->c_cflag, old->c_cflag);
1383
1384 /* the actual setup */
1385 spin_lock_irqsave(&serial->serial_lock, flags);
1386 if (serial->open_count)
1387 _hso_serial_set_termios(tty, old);
1388 else
1389 tty->termios = old;
1390 spin_unlock_irqrestore(&serial->serial_lock, flags);
1391
1392 /* done */
1393 return;
1394 }
1395
1396 /* how many characters in the buffer */
1397 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1398 {
1399 struct hso_serial *serial = get_serial_by_tty(tty);
1400 int chars;
1401 unsigned long flags;
1402
1403 /* sanity check */
1404 if (serial == NULL)
1405 return 0;
1406
1407 spin_lock_irqsave(&serial->serial_lock, flags);
1408 chars = serial->tx_buffer_count;
1409 spin_unlock_irqrestore(&serial->serial_lock, flags);
1410
1411 return chars;
1412 }
1413
1414 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1415 {
1416 unsigned int value;
1417 struct hso_serial *serial = get_serial_by_tty(tty);
1418 unsigned long flags;
1419
1420 /* sanity check */
1421 if (!serial) {
1422 D1("no tty structures");
1423 return -EINVAL;
1424 }
1425
1426 spin_lock_irqsave(&serial->serial_lock, flags);
1427 value = ((serial->rts_state) ? TIOCM_RTS : 0) |
1428 ((serial->dtr_state) ? TIOCM_DTR : 0);
1429 spin_unlock_irqrestore(&serial->serial_lock, flags);
1430
1431 return value;
1432 }
1433
1434 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1435 unsigned int set, unsigned int clear)
1436 {
1437 int val = 0;
1438 unsigned long flags;
1439 int if_num;
1440 struct hso_serial *serial = get_serial_by_tty(tty);
1441
1442 /* sanity check */
1443 if (!serial) {
1444 D1("no tty structures");
1445 return -EINVAL;
1446 }
1447 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1448
1449 spin_lock_irqsave(&serial->serial_lock, flags);
1450 if (set & TIOCM_RTS)
1451 serial->rts_state = 1;
1452 if (set & TIOCM_DTR)
1453 serial->dtr_state = 1;
1454
1455 if (clear & TIOCM_RTS)
1456 serial->rts_state = 0;
1457 if (clear & TIOCM_DTR)
1458 serial->dtr_state = 0;
1459
1460 if (serial->dtr_state)
1461 val |= 0x01;
1462 if (serial->rts_state)
1463 val |= 0x02;
1464
1465 spin_unlock_irqrestore(&serial->serial_lock, flags);
1466
1467 return usb_control_msg(serial->parent->usb,
1468 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1469 0x21, val, if_num, NULL, 0,
1470 USB_CTRL_SET_TIMEOUT);
1471 }
1472
1473 /* starts a transmit */
1474 static void hso_kick_transmit(struct hso_serial *serial)
1475 {
1476 u8 *temp;
1477 unsigned long flags;
1478 int res;
1479
1480 spin_lock_irqsave(&serial->serial_lock, flags);
1481 if (!serial->tx_buffer_count)
1482 goto out;
1483
1484 if (serial->tx_urb_used)
1485 goto out;
1486
1487 /* Wakeup USB interface if necessary */
1488 if (hso_get_activity(serial->parent) == -EAGAIN)
1489 goto out;
1490
1491 /* Switch pointers around to avoid memcpy */
1492 temp = serial->tx_buffer;
1493 serial->tx_buffer = serial->tx_data;
1494 serial->tx_data = temp;
1495 serial->tx_data_count = serial->tx_buffer_count;
1496 serial->tx_buffer_count = 0;
1497
1498 /* If temp is set, it means we switched buffers */
1499 if (temp && serial->write_data) {
1500 res = serial->write_data(serial);
1501 if (res >= 0)
1502 serial->tx_urb_used = 1;
1503 }
1504 out:
1505 spin_unlock_irqrestore(&serial->serial_lock, flags);
1506 }
1507
1508 /* make a request (for reading and writing data to muxed serial port) */
1509 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1510 struct urb *ctrl_urb,
1511 struct usb_ctrlrequest *ctrl_req,
1512 u8 *ctrl_urb_data, u32 size)
1513 {
1514 int result;
1515 int pipe;
1516
1517 /* Sanity check */
1518 if (!serial || !ctrl_urb || !ctrl_req) {
1519 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1520 return -EINVAL;
1521 }
1522
1523 /* initialize */
1524 ctrl_req->wValue = 0;
1525 ctrl_req->wIndex = hso_port_to_mux(port);
1526 ctrl_req->wLength = size;
1527
1528 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1529 /* Reading command */
1530 ctrl_req->bRequestType = USB_DIR_IN |
1531 USB_TYPE_OPTION_VENDOR |
1532 USB_RECIP_INTERFACE;
1533 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1534 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1535 } else {
1536 /* Writing command */
1537 ctrl_req->bRequestType = USB_DIR_OUT |
1538 USB_TYPE_OPTION_VENDOR |
1539 USB_RECIP_INTERFACE;
1540 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1541 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1542 }
1543 /* syslog */
1544 D2("%s command (%02x) len: %d, port: %d",
1545 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1546 ctrl_req->bRequestType, ctrl_req->wLength, port);
1547
1548 /* Load ctrl urb */
1549 ctrl_urb->transfer_flags = 0;
1550 usb_fill_control_urb(ctrl_urb,
1551 serial->parent->usb,
1552 pipe,
1553 (u8 *) ctrl_req,
1554 ctrl_urb_data, size, ctrl_callback, serial);
1555 /* Send it on merry way */
1556 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1557 if (result) {
1558 dev_err(&ctrl_urb->dev->dev,
1559 "%s failed submit ctrl_urb %d type %d", __func__,
1560 result, type);
1561 return result;
1562 }
1563
1564 /* done */
1565 return size;
1566 }
1567
1568 /* called by intr_callback when read occurs */
1569 static int hso_mux_serial_read(struct hso_serial *serial)
1570 {
1571 if (!serial)
1572 return -EINVAL;
1573
1574 /* clean data */
1575 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1576 /* make the request */
1577
1578 if (serial->num_rx_urbs != 1) {
1579 dev_err(&serial->parent->interface->dev,
1580 "ERROR: mux'd reads with multiple buffers "
1581 "not possible\n");
1582 return 0;
1583 }
1584 return mux_device_request(serial,
1585 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1586 serial->parent->port_spec & HSO_PORT_MASK,
1587 serial->rx_urb[0],
1588 &serial->ctrl_req_rx,
1589 serial->rx_data[0], serial->rx_data_length);
1590 }
1591
1592 /* used for muxed serial port callback (muxed serial read) */
1593 static void intr_callback(struct urb *urb)
1594 {
1595 struct hso_shared_int *shared_int = urb->context;
1596 struct hso_serial *serial;
1597 unsigned char *port_req;
1598 int status = urb->status;
1599 int i;
1600
1601 usb_mark_last_busy(urb->dev);
1602
1603 /* sanity check */
1604 if (!shared_int)
1605 return;
1606
1607 /* status check */
1608 if (status) {
1609 log_usb_status(status, __func__);
1610 return;
1611 }
1612 D4("\n--- Got intr callback 0x%02X ---", status);
1613
1614 /* what request? */
1615 port_req = urb->transfer_buffer;
1616 D4(" port_req = 0x%.2X\n", *port_req);
1617 /* loop over all muxed ports to find the one sending this */
1618 for (i = 0; i < 8; i++) {
1619 /* max 8 channels on MUX */
1620 if (*port_req & (1 << i)) {
1621 serial = get_serial_by_shared_int_and_type(shared_int,
1622 (1 << i));
1623 if (serial != NULL) {
1624 D1("Pending read interrupt on port %d\n", i);
1625 spin_lock(&serial->serial_lock);
1626 if (serial->rx_state == RX_IDLE) {
1627 /* Setup and send a ctrl req read on
1628 * port i */
1629 if (!serial->rx_urb_filled[0]) {
1630 serial->rx_state = RX_SENT;
1631 hso_mux_serial_read(serial);
1632 } else
1633 serial->rx_state = RX_PENDING;
1634
1635 } else {
1636 D1("Already pending a read on "
1637 "port %d\n", i);
1638 }
1639 spin_unlock(&serial->serial_lock);
1640 }
1641 }
1642 }
1643 /* Resubmit interrupt urb */
1644 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1645 }
1646
1647 /* called for writing to muxed serial port */
1648 static int hso_mux_serial_write_data(struct hso_serial *serial)
1649 {
1650 if (NULL == serial)
1651 return -EINVAL;
1652
1653 return mux_device_request(serial,
1654 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1655 serial->parent->port_spec & HSO_PORT_MASK,
1656 serial->tx_urb,
1657 &serial->ctrl_req_tx,
1658 serial->tx_data, serial->tx_data_count);
1659 }
1660
1661 /* write callback for Diag and CS port */
1662 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1663 {
1664 struct hso_serial *serial = urb->context;
1665 int status = urb->status;
1666 struct tty_struct *tty;
1667
1668 /* sanity check */
1669 if (!serial) {
1670 D1("serial == NULL");
1671 return;
1672 }
1673
1674 spin_lock(&serial->serial_lock);
1675 serial->tx_urb_used = 0;
1676 tty = tty_kref_get(serial->tty);
1677 spin_unlock(&serial->serial_lock);
1678 if (status) {
1679 log_usb_status(status, __func__);
1680 tty_kref_put(tty);
1681 return;
1682 }
1683 hso_put_activity(serial->parent);
1684 if (tty) {
1685 tty_wakeup(tty);
1686 tty_kref_put(tty);
1687 }
1688 hso_kick_transmit(serial);
1689
1690 D1(" ");
1691 return;
1692 }
1693
1694 /* called for writing diag or CS serial port */
1695 static int hso_std_serial_write_data(struct hso_serial *serial)
1696 {
1697 int count = serial->tx_data_count;
1698 int result;
1699
1700 usb_fill_bulk_urb(serial->tx_urb,
1701 serial->parent->usb,
1702 usb_sndbulkpipe(serial->parent->usb,
1703 serial->out_endp->
1704 bEndpointAddress & 0x7F),
1705 serial->tx_data, serial->tx_data_count,
1706 hso_std_serial_write_bulk_callback, serial);
1707
1708 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1709 if (result) {
1710 dev_warn(&serial->parent->usb->dev,
1711 "Failed to submit urb - res %d\n", result);
1712 return result;
1713 }
1714
1715 return count;
1716 }
1717
1718 /* callback after read or write on muxed serial port */
1719 static void ctrl_callback(struct urb *urb)
1720 {
1721 struct hso_serial *serial = urb->context;
1722 struct usb_ctrlrequest *req;
1723 int status = urb->status;
1724 struct tty_struct *tty;
1725
1726 /* sanity check */
1727 if (!serial)
1728 return;
1729
1730 spin_lock(&serial->serial_lock);
1731 serial->tx_urb_used = 0;
1732 tty = tty_kref_get(serial->tty);
1733 spin_unlock(&serial->serial_lock);
1734 if (status) {
1735 log_usb_status(status, __func__);
1736 tty_kref_put(tty);
1737 return;
1738 }
1739
1740 /* what request? */
1741 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1742 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1743 D4("Actual length of urb = %d\n", urb->actual_length);
1744 DUMP1(urb->transfer_buffer, urb->actual_length);
1745
1746 if (req->bRequestType ==
1747 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1748 /* response to a read command */
1749 serial->rx_urb_filled[0] = 1;
1750 spin_lock(&serial->serial_lock);
1751 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1752 spin_unlock(&serial->serial_lock);
1753 } else {
1754 hso_put_activity(serial->parent);
1755 if (tty)
1756 tty_wakeup(tty);
1757 /* response to a write command */
1758 hso_kick_transmit(serial);
1759 }
1760 tty_kref_put(tty);
1761 }
1762
1763 /* handle RX data for serial port */
1764 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1765 {
1766 struct tty_struct *tty;
1767 int write_length_remaining = 0;
1768 int curr_write_len;
1769
1770 /* Sanity check */
1771 if (urb == NULL || serial == NULL) {
1772 D1("serial = NULL");
1773 return -2;
1774 }
1775
1776 spin_lock(&serial->serial_lock);
1777 tty = tty_kref_get(serial->tty);
1778 spin_unlock(&serial->serial_lock);
1779
1780 /* Push data to tty */
1781 if (tty) {
1782 write_length_remaining = urb->actual_length -
1783 serial->curr_rx_urb_offset;
1784 D1("data to push to tty");
1785 while (write_length_remaining) {
1786 if (test_bit(TTY_THROTTLED, &tty->flags))
1787 return -1;
1788 curr_write_len = tty_insert_flip_string
1789 (tty, urb->transfer_buffer +
1790 serial->curr_rx_urb_offset,
1791 write_length_remaining);
1792 serial->curr_rx_urb_offset += curr_write_len;
1793 write_length_remaining -= curr_write_len;
1794 tty_flip_buffer_push(tty);
1795 }
1796 }
1797 if (write_length_remaining == 0) {
1798 serial->curr_rx_urb_offset = 0;
1799 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1800 }
1801 tty_kref_put(tty);
1802 return write_length_remaining;
1803 }
1804
1805
1806 /* Base driver functions */
1807
1808 static void hso_log_port(struct hso_device *hso_dev)
1809 {
1810 char *port_type;
1811 char port_dev[20];
1812
1813 switch (hso_dev->port_spec & HSO_PORT_MASK) {
1814 case HSO_PORT_CONTROL:
1815 port_type = "Control";
1816 break;
1817 case HSO_PORT_APP:
1818 port_type = "Application";
1819 break;
1820 case HSO_PORT_GPS:
1821 port_type = "GPS";
1822 break;
1823 case HSO_PORT_GPS_CONTROL:
1824 port_type = "GPS control";
1825 break;
1826 case HSO_PORT_APP2:
1827 port_type = "Application2";
1828 break;
1829 case HSO_PORT_PCSC:
1830 port_type = "PCSC";
1831 break;
1832 case HSO_PORT_DIAG:
1833 port_type = "Diagnostic";
1834 break;
1835 case HSO_PORT_DIAG2:
1836 port_type = "Diagnostic2";
1837 break;
1838 case HSO_PORT_MODEM:
1839 port_type = "Modem";
1840 break;
1841 case HSO_PORT_NETWORK:
1842 port_type = "Network";
1843 break;
1844 default:
1845 port_type = "Unknown";
1846 break;
1847 }
1848 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1849 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1850 } else
1851 sprintf(port_dev, "/dev/%s%d", tty_filename,
1852 dev2ser(hso_dev)->minor);
1853
1854 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1855 port_type, port_dev);
1856 }
1857
1858 static int hso_start_net_device(struct hso_device *hso_dev)
1859 {
1860 int i, result = 0;
1861 struct hso_net *hso_net = dev2net(hso_dev);
1862
1863 if (!hso_net)
1864 return -ENODEV;
1865
1866 /* send URBs for all read buffers */
1867 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1868
1869 /* Prep a receive URB */
1870 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1871 hso_dev->usb,
1872 usb_rcvbulkpipe(hso_dev->usb,
1873 hso_net->in_endp->
1874 bEndpointAddress & 0x7F),
1875 hso_net->mux_bulk_rx_buf_pool[i],
1876 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1877 hso_net);
1878
1879 /* Put it out there so the device can send us stuff */
1880 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1881 GFP_NOIO);
1882 if (result)
1883 dev_warn(&hso_dev->usb->dev,
1884 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1885 i, result);
1886 }
1887
1888 return result;
1889 }
1890
1891 static int hso_stop_net_device(struct hso_device *hso_dev)
1892 {
1893 int i;
1894 struct hso_net *hso_net = dev2net(hso_dev);
1895
1896 if (!hso_net)
1897 return -ENODEV;
1898
1899 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1900 if (hso_net->mux_bulk_rx_urb_pool[i])
1901 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1902
1903 }
1904 if (hso_net->mux_bulk_tx_urb)
1905 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1906
1907 return 0;
1908 }
1909
1910 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1911 {
1912 int i, result = 0;
1913 struct hso_serial *serial = dev2ser(hso_dev);
1914
1915 if (!serial)
1916 return -ENODEV;
1917
1918 /* If it is not the MUX port fill in and submit a bulk urb (already
1919 * allocated in hso_serial_start) */
1920 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1921 for (i = 0; i < serial->num_rx_urbs; i++) {
1922 usb_fill_bulk_urb(serial->rx_urb[i],
1923 serial->parent->usb,
1924 usb_rcvbulkpipe(serial->parent->usb,
1925 serial->in_endp->
1926 bEndpointAddress &
1927 0x7F),
1928 serial->rx_data[i],
1929 serial->rx_data_length,
1930 hso_std_serial_read_bulk_callback,
1931 serial);
1932 result = usb_submit_urb(serial->rx_urb[i], flags);
1933 if (result) {
1934 dev_warn(&serial->parent->usb->dev,
1935 "Failed to submit urb - res %d\n",
1936 result);
1937 break;
1938 }
1939 }
1940 } else {
1941 mutex_lock(&serial->shared_int->shared_int_lock);
1942 if (!serial->shared_int->use_count) {
1943 result =
1944 hso_mux_submit_intr_urb(serial->shared_int,
1945 hso_dev->usb, flags);
1946 }
1947 serial->shared_int->use_count++;
1948 mutex_unlock(&serial->shared_int->shared_int_lock);
1949 }
1950
1951 return result;
1952 }
1953
1954 static int hso_stop_serial_device(struct hso_device *hso_dev)
1955 {
1956 int i;
1957 struct hso_serial *serial = dev2ser(hso_dev);
1958
1959 if (!serial)
1960 return -ENODEV;
1961
1962 for (i = 0; i < serial->num_rx_urbs; i++) {
1963 if (serial->rx_urb[i]) {
1964 usb_kill_urb(serial->rx_urb[i]);
1965 serial->rx_urb_filled[i] = 0;
1966 }
1967 }
1968 serial->curr_rx_urb_idx = 0;
1969 serial->curr_rx_urb_offset = 0;
1970
1971 if (serial->tx_urb)
1972 usb_kill_urb(serial->tx_urb);
1973
1974 if (serial->shared_int) {
1975 mutex_lock(&serial->shared_int->shared_int_lock);
1976 if (serial->shared_int->use_count &&
1977 (--serial->shared_int->use_count == 0)) {
1978 struct urb *urb;
1979
1980 urb = serial->shared_int->shared_intr_urb;
1981 if (urb)
1982 usb_kill_urb(urb);
1983 }
1984 mutex_unlock(&serial->shared_int->shared_int_lock);
1985 }
1986
1987 return 0;
1988 }
1989
1990 static void hso_serial_common_free(struct hso_serial *serial)
1991 {
1992 int i;
1993
1994 if (serial->parent->dev)
1995 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
1996
1997 tty_unregister_device(tty_drv, serial->minor);
1998
1999 for (i = 0; i < serial->num_rx_urbs; i++) {
2000 /* unlink and free RX URB */
2001 usb_free_urb(serial->rx_urb[i]);
2002 /* free the RX buffer */
2003 kfree(serial->rx_data[i]);
2004 }
2005
2006 /* unlink and free TX URB */
2007 usb_free_urb(serial->tx_urb);
2008 kfree(serial->tx_data);
2009 }
2010
2011 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2012 int rx_size, int tx_size)
2013 {
2014 struct device *dev;
2015 int minor;
2016 int i;
2017
2018 minor = get_free_serial_index();
2019 if (minor < 0)
2020 goto exit;
2021
2022 /* register our minor number */
2023 serial->parent->dev = tty_register_device(tty_drv, minor,
2024 &serial->parent->interface->dev);
2025 dev = serial->parent->dev;
2026 dev->driver_data = serial->parent;
2027 i = device_create_file(dev, &dev_attr_hsotype);
2028
2029 /* fill in specific data for later use */
2030 serial->minor = minor;
2031 serial->magic = HSO_SERIAL_MAGIC;
2032 spin_lock_init(&serial->serial_lock);
2033 serial->num_rx_urbs = num_urbs;
2034
2035 /* RX, allocate urb and initialize */
2036
2037 /* prepare our RX buffer */
2038 serial->rx_data_length = rx_size;
2039 for (i = 0; i < serial->num_rx_urbs; i++) {
2040 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2041 if (!serial->rx_urb[i]) {
2042 dev_err(dev, "Could not allocate urb?\n");
2043 goto exit;
2044 }
2045 serial->rx_urb[i]->transfer_buffer = NULL;
2046 serial->rx_urb[i]->transfer_buffer_length = 0;
2047 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2048 GFP_KERNEL);
2049 if (!serial->rx_data[i]) {
2050 dev_err(dev, "%s - Out of memory\n", __func__);
2051 goto exit;
2052 }
2053 }
2054
2055 /* TX, allocate urb and initialize */
2056 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2057 if (!serial->tx_urb) {
2058 dev_err(dev, "Could not allocate urb?\n");
2059 goto exit;
2060 }
2061 serial->tx_urb->transfer_buffer = NULL;
2062 serial->tx_urb->transfer_buffer_length = 0;
2063 /* prepare our TX buffer */
2064 serial->tx_data_count = 0;
2065 serial->tx_buffer_count = 0;
2066 serial->tx_data_length = tx_size;
2067 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2068 if (!serial->tx_data) {
2069 dev_err(dev, "%s - Out of memory", __func__);
2070 goto exit;
2071 }
2072 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2073 if (!serial->tx_buffer) {
2074 dev_err(dev, "%s - Out of memory", __func__);
2075 goto exit;
2076 }
2077
2078 return 0;
2079 exit:
2080 hso_serial_common_free(serial);
2081 return -1;
2082 }
2083
2084 /* Frees a general hso device */
2085 static void hso_free_device(struct hso_device *hso_dev)
2086 {
2087 kfree(hso_dev);
2088 }
2089
2090 /* Creates a general hso device */
2091 static struct hso_device *hso_create_device(struct usb_interface *intf,
2092 int port_spec)
2093 {
2094 struct hso_device *hso_dev;
2095
2096 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2097 if (!hso_dev)
2098 return NULL;
2099
2100 hso_dev->port_spec = port_spec;
2101 hso_dev->usb = interface_to_usbdev(intf);
2102 hso_dev->interface = intf;
2103 kref_init(&hso_dev->ref);
2104 mutex_init(&hso_dev->mutex);
2105
2106 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2107 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2108
2109 return hso_dev;
2110 }
2111
2112 /* Removes a network device in the network device table */
2113 static int remove_net_device(struct hso_device *hso_dev)
2114 {
2115 int i;
2116
2117 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2118 if (network_table[i] == hso_dev) {
2119 network_table[i] = NULL;
2120 break;
2121 }
2122 }
2123 if (i == HSO_MAX_NET_DEVICES)
2124 return -1;
2125 return 0;
2126 }
2127
2128 /* Frees our network device */
2129 static void hso_free_net_device(struct hso_device *hso_dev)
2130 {
2131 int i;
2132 struct hso_net *hso_net = dev2net(hso_dev);
2133
2134 if (!hso_net)
2135 return;
2136
2137 /* start freeing */
2138 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2139 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2140 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2141 }
2142 usb_free_urb(hso_net->mux_bulk_tx_urb);
2143 kfree(hso_net->mux_bulk_tx_buf);
2144
2145 remove_net_device(hso_net->parent);
2146
2147 if (hso_net->net) {
2148 unregister_netdev(hso_net->net);
2149 free_netdev(hso_net->net);
2150 }
2151
2152 hso_free_device(hso_dev);
2153 }
2154
2155 /* initialize the network interface */
2156 static void hso_net_init(struct net_device *net)
2157 {
2158 struct hso_net *hso_net = netdev_priv(net);
2159
2160 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2161
2162 /* fill in the other fields */
2163 net->open = hso_net_open;
2164 net->stop = hso_net_close;
2165 net->hard_start_xmit = hso_net_start_xmit;
2166 net->tx_timeout = hso_net_tx_timeout;
2167 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2168 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2169 net->type = ARPHRD_NONE;
2170 net->mtu = DEFAULT_MTU - 14;
2171 net->tx_queue_len = 10;
2172 SET_ETHTOOL_OPS(net, &ops);
2173
2174 /* and initialize the semaphore */
2175 spin_lock_init(&hso_net->net_lock);
2176 }
2177
2178 /* Adds a network device in the network device table */
2179 static int add_net_device(struct hso_device *hso_dev)
2180 {
2181 int i;
2182
2183 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2184 if (network_table[i] == NULL) {
2185 network_table[i] = hso_dev;
2186 break;
2187 }
2188 }
2189 if (i == HSO_MAX_NET_DEVICES)
2190 return -1;
2191 return 0;
2192 }
2193
2194 static int hso_radio_toggle(void *data, enum rfkill_state state)
2195 {
2196 struct hso_device *hso_dev = data;
2197 int enabled = (state == RFKILL_STATE_ON);
2198 int rv;
2199
2200 mutex_lock(&hso_dev->mutex);
2201 if (hso_dev->usb_gone)
2202 rv = 0;
2203 else
2204 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2205 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2206 USB_CTRL_SET_TIMEOUT);
2207 mutex_unlock(&hso_dev->mutex);
2208 return rv;
2209 }
2210
2211 /* Creates and sets up everything for rfkill */
2212 static void hso_create_rfkill(struct hso_device *hso_dev,
2213 struct usb_interface *interface)
2214 {
2215 struct hso_net *hso_net = dev2net(hso_dev);
2216 struct device *dev = &hso_net->net->dev;
2217 char *rfkn;
2218
2219 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2220 RFKILL_TYPE_WWAN);
2221 if (!hso_net->rfkill) {
2222 dev_err(dev, "%s - Out of memory\n", __func__);
2223 return;
2224 }
2225 rfkn = kzalloc(20, GFP_KERNEL);
2226 if (!rfkn) {
2227 rfkill_free(hso_net->rfkill);
2228 hso_net->rfkill = NULL;
2229 dev_err(dev, "%s - Out of memory\n", __func__);
2230 return;
2231 }
2232 snprintf(rfkn, 20, "hso-%d",
2233 interface->altsetting->desc.bInterfaceNumber);
2234 hso_net->rfkill->name = rfkn;
2235 hso_net->rfkill->state = RFKILL_STATE_ON;
2236 hso_net->rfkill->data = hso_dev;
2237 hso_net->rfkill->toggle_radio = hso_radio_toggle;
2238 if (rfkill_register(hso_net->rfkill) < 0) {
2239 kfree(rfkn);
2240 hso_net->rfkill->name = NULL;
2241 rfkill_free(hso_net->rfkill);
2242 hso_net->rfkill = NULL;
2243 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2244 return;
2245 }
2246 }
2247
2248 /* Creates our network device */
2249 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2250 {
2251 int result, i;
2252 struct net_device *net;
2253 struct hso_net *hso_net;
2254 struct hso_device *hso_dev;
2255
2256 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2257 if (!hso_dev)
2258 return NULL;
2259
2260 /* allocate our network device, then we can put in our private data */
2261 /* call hso_net_init to do the basic initialization */
2262 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2263 if (!net) {
2264 dev_err(&interface->dev, "Unable to create ethernet device\n");
2265 goto exit;
2266 }
2267
2268 hso_net = netdev_priv(net);
2269
2270 hso_dev->port_data.dev_net = hso_net;
2271 hso_net->net = net;
2272 hso_net->parent = hso_dev;
2273
2274 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2275 USB_DIR_IN);
2276 if (!hso_net->in_endp) {
2277 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2278 goto exit;
2279 }
2280 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2281 USB_DIR_OUT);
2282 if (!hso_net->out_endp) {
2283 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2284 goto exit;
2285 }
2286 SET_NETDEV_DEV(net, &interface->dev);
2287
2288 /* registering our net device */
2289 result = register_netdev(net);
2290 if (result) {
2291 dev_err(&interface->dev, "Failed to register device\n");
2292 goto exit;
2293 }
2294
2295 /* start allocating */
2296 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2297 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2298 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2299 dev_err(&interface->dev, "Could not allocate rx urb\n");
2300 goto exit;
2301 }
2302 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2303 GFP_KERNEL);
2304 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2305 dev_err(&interface->dev, "Could not allocate rx buf\n");
2306 goto exit;
2307 }
2308 }
2309 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2310 if (!hso_net->mux_bulk_tx_urb) {
2311 dev_err(&interface->dev, "Could not allocate tx urb\n");
2312 goto exit;
2313 }
2314 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2315 if (!hso_net->mux_bulk_tx_buf) {
2316 dev_err(&interface->dev, "Could not allocate tx buf\n");
2317 goto exit;
2318 }
2319
2320 add_net_device(hso_dev);
2321
2322 hso_log_port(hso_dev);
2323
2324 hso_create_rfkill(hso_dev, interface);
2325
2326 return hso_dev;
2327 exit:
2328 hso_free_net_device(hso_dev);
2329 return NULL;
2330 }
2331
2332 /* Frees an AT channel ( goes for both mux and non-mux ) */
2333 static void hso_free_serial_device(struct hso_device *hso_dev)
2334 {
2335 struct hso_serial *serial = dev2ser(hso_dev);
2336
2337 if (!serial)
2338 return;
2339 set_serial_by_index(serial->minor, NULL);
2340
2341 hso_serial_common_free(serial);
2342
2343 if (serial->shared_int) {
2344 mutex_lock(&serial->shared_int->shared_int_lock);
2345 if (--serial->shared_int->ref_count == 0)
2346 hso_free_shared_int(serial->shared_int);
2347 else
2348 mutex_unlock(&serial->shared_int->shared_int_lock);
2349 }
2350 kfree(serial);
2351 hso_free_device(hso_dev);
2352 }
2353
2354 /* Creates a bulk AT channel */
2355 static struct hso_device *hso_create_bulk_serial_device(
2356 struct usb_interface *interface, int port)
2357 {
2358 struct hso_device *hso_dev;
2359 struct hso_serial *serial;
2360 int num_urbs;
2361
2362 hso_dev = hso_create_device(interface, port);
2363 if (!hso_dev)
2364 return NULL;
2365
2366 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2367 if (!serial)
2368 goto exit;
2369
2370 serial->parent = hso_dev;
2371 hso_dev->port_data.dev_serial = serial;
2372
2373 if (port & HSO_PORT_MODEM)
2374 num_urbs = 2;
2375 else
2376 num_urbs = 1;
2377
2378 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2379 BULK_URB_TX_SIZE))
2380 goto exit;
2381
2382 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2383 USB_DIR_IN);
2384 if (!serial->in_endp) {
2385 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2386 goto exit2;
2387 }
2388
2389 if (!
2390 (serial->out_endp =
2391 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2392 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2393 goto exit2;
2394 }
2395
2396 serial->write_data = hso_std_serial_write_data;
2397
2398 /* and record this serial */
2399 set_serial_by_index(serial->minor, serial);
2400
2401 /* setup the proc dirs and files if needed */
2402 hso_log_port(hso_dev);
2403
2404 /* done, return it */
2405 return hso_dev;
2406
2407 exit2:
2408 hso_serial_common_free(serial);
2409 exit:
2410 kfree(serial);
2411 hso_free_device(hso_dev);
2412 return NULL;
2413 }
2414
2415 /* Creates a multiplexed AT channel */
2416 static
2417 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2418 int port,
2419 struct hso_shared_int *mux)
2420 {
2421 struct hso_device *hso_dev;
2422 struct hso_serial *serial;
2423 int port_spec;
2424
2425 port_spec = HSO_INTF_MUX;
2426 port_spec &= ~HSO_PORT_MASK;
2427
2428 port_spec |= hso_mux_to_port(port);
2429 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2430 return NULL;
2431
2432 hso_dev = hso_create_device(interface, port_spec);
2433 if (!hso_dev)
2434 return NULL;
2435
2436 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2437 if (!serial)
2438 goto exit;
2439
2440 hso_dev->port_data.dev_serial = serial;
2441 serial->parent = hso_dev;
2442
2443 if (hso_serial_common_create
2444 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2445 goto exit;
2446
2447 serial->tx_data_length--;
2448 serial->write_data = hso_mux_serial_write_data;
2449
2450 serial->shared_int = mux;
2451 mutex_lock(&serial->shared_int->shared_int_lock);
2452 serial->shared_int->ref_count++;
2453 mutex_unlock(&serial->shared_int->shared_int_lock);
2454
2455 /* and record this serial */
2456 set_serial_by_index(serial->minor, serial);
2457
2458 /* setup the proc dirs and files if needed */
2459 hso_log_port(hso_dev);
2460
2461 /* done, return it */
2462 return hso_dev;
2463
2464 exit:
2465 if (serial) {
2466 tty_unregister_device(tty_drv, serial->minor);
2467 kfree(serial);
2468 }
2469 if (hso_dev)
2470 hso_free_device(hso_dev);
2471 return NULL;
2472
2473 }
2474
2475 static void hso_free_shared_int(struct hso_shared_int *mux)
2476 {
2477 usb_free_urb(mux->shared_intr_urb);
2478 kfree(mux->shared_intr_buf);
2479 mutex_unlock(&mux->shared_int_lock);
2480 kfree(mux);
2481 }
2482
2483 static
2484 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2485 {
2486 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2487
2488 if (!mux)
2489 return NULL;
2490
2491 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2492 USB_DIR_IN);
2493 if (!mux->intr_endp) {
2494 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2495 goto exit;
2496 }
2497
2498 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2499 if (!mux->shared_intr_urb) {
2500 dev_err(&interface->dev, "Could not allocate intr urb?");
2501 goto exit;
2502 }
2503 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2504 GFP_KERNEL);
2505 if (!mux->shared_intr_buf) {
2506 dev_err(&interface->dev, "Could not allocate intr buf?");
2507 goto exit;
2508 }
2509
2510 mutex_init(&mux->shared_int_lock);
2511
2512 return mux;
2513
2514 exit:
2515 kfree(mux->shared_intr_buf);
2516 usb_free_urb(mux->shared_intr_urb);
2517 kfree(mux);
2518 return NULL;
2519 }
2520
2521 /* Gets the port spec for a certain interface */
2522 static int hso_get_config_data(struct usb_interface *interface)
2523 {
2524 struct usb_device *usbdev = interface_to_usbdev(interface);
2525 u8 config_data[17];
2526 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2527 s32 result;
2528
2529 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2530 0x86, 0xC0, 0, 0, config_data, 17,
2531 USB_CTRL_SET_TIMEOUT) != 0x11) {
2532 return -EIO;
2533 }
2534
2535 switch (config_data[if_num]) {
2536 case 0x0:
2537 result = 0;
2538 break;
2539 case 0x1:
2540 result = HSO_PORT_DIAG;
2541 break;
2542 case 0x2:
2543 result = HSO_PORT_GPS;
2544 break;
2545 case 0x3:
2546 result = HSO_PORT_GPS_CONTROL;
2547 break;
2548 case 0x4:
2549 result = HSO_PORT_APP;
2550 break;
2551 case 0x5:
2552 result = HSO_PORT_APP2;
2553 break;
2554 case 0x6:
2555 result = HSO_PORT_CONTROL;
2556 break;
2557 case 0x7:
2558 result = HSO_PORT_NETWORK;
2559 break;
2560 case 0x8:
2561 result = HSO_PORT_MODEM;
2562 break;
2563 case 0x9:
2564 result = HSO_PORT_MSD;
2565 break;
2566 case 0xa:
2567 result = HSO_PORT_PCSC;
2568 break;
2569 case 0xb:
2570 result = HSO_PORT_VOICE;
2571 break;
2572 default:
2573 result = 0;
2574 }
2575
2576 if (result)
2577 result |= HSO_INTF_BULK;
2578
2579 if (config_data[16] & 0x1)
2580 result |= HSO_INFO_CRC_BUG;
2581
2582 return result;
2583 }
2584
2585 /* called once for each interface upon device insertion */
2586 static int hso_probe(struct usb_interface *interface,
2587 const struct usb_device_id *id)
2588 {
2589 int mux, i, if_num, port_spec;
2590 unsigned char port_mask;
2591 struct hso_device *hso_dev = NULL;
2592 struct hso_shared_int *shared_int;
2593 struct hso_device *tmp_dev = NULL;
2594
2595 if_num = interface->altsetting->desc.bInterfaceNumber;
2596
2597 /* Get the interface/port specification from either driver_info or from
2598 * the device itself */
2599 if (id->driver_info)
2600 port_spec = ((u32 *)(id->driver_info))[if_num];
2601 else
2602 port_spec = hso_get_config_data(interface);
2603
2604 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2605 dev_err(&interface->dev, "Not our interface\n");
2606 return -ENODEV;
2607 }
2608 /* Check if we need to switch to alt interfaces prior to port
2609 * configuration */
2610 if (interface->num_altsetting > 1)
2611 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2612 interface->needs_remote_wakeup = 1;
2613
2614 /* Allocate new hso device(s) */
2615 switch (port_spec & HSO_INTF_MASK) {
2616 case HSO_INTF_MUX:
2617 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2618 /* Create the network device */
2619 if (!disable_net) {
2620 hso_dev = hso_create_net_device(interface);
2621 if (!hso_dev)
2622 goto exit;
2623 tmp_dev = hso_dev;
2624 }
2625 }
2626
2627 if (hso_get_mux_ports(interface, &port_mask))
2628 /* TODO: de-allocate everything */
2629 goto exit;
2630
2631 shared_int = hso_create_shared_int(interface);
2632 if (!shared_int)
2633 goto exit;
2634
2635 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2636 if (port_mask & i) {
2637 hso_dev = hso_create_mux_serial_device(
2638 interface, i, shared_int);
2639 if (!hso_dev)
2640 goto exit;
2641 }
2642 }
2643
2644 if (tmp_dev)
2645 hso_dev = tmp_dev;
2646 break;
2647
2648 case HSO_INTF_BULK:
2649 /* It's a regular bulk interface */
2650 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2651 && !disable_net)
2652 hso_dev = hso_create_net_device(interface);
2653 else
2654 hso_dev =
2655 hso_create_bulk_serial_device(interface, port_spec);
2656 if (!hso_dev)
2657 goto exit;
2658 break;
2659 default:
2660 goto exit;
2661 }
2662
2663 usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2664
2665 /* save our data pointer in this device */
2666 usb_set_intfdata(interface, hso_dev);
2667
2668 /* done */
2669 return 0;
2670 exit:
2671 hso_free_interface(interface);
2672 return -ENODEV;
2673 }
2674
2675 /* device removed, cleaning up */
2676 static void hso_disconnect(struct usb_interface *interface)
2677 {
2678 hso_free_interface(interface);
2679
2680 /* remove reference of our private data */
2681 usb_set_intfdata(interface, NULL);
2682
2683 usb_driver_release_interface(&hso_driver, interface);
2684 }
2685
2686 static void async_get_intf(struct work_struct *data)
2687 {
2688 struct hso_device *hso_dev =
2689 container_of(data, struct hso_device, async_get_intf);
2690 usb_autopm_get_interface(hso_dev->interface);
2691 }
2692
2693 static void async_put_intf(struct work_struct *data)
2694 {
2695 struct hso_device *hso_dev =
2696 container_of(data, struct hso_device, async_put_intf);
2697 usb_autopm_put_interface(hso_dev->interface);
2698 }
2699
2700 static int hso_get_activity(struct hso_device *hso_dev)
2701 {
2702 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2703 if (!hso_dev->is_active) {
2704 hso_dev->is_active = 1;
2705 schedule_work(&hso_dev->async_get_intf);
2706 }
2707 }
2708
2709 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2710 return -EAGAIN;
2711
2712 usb_mark_last_busy(hso_dev->usb);
2713
2714 return 0;
2715 }
2716
2717 static int hso_put_activity(struct hso_device *hso_dev)
2718 {
2719 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2720 if (hso_dev->is_active) {
2721 hso_dev->is_active = 0;
2722 schedule_work(&hso_dev->async_put_intf);
2723 return -EAGAIN;
2724 }
2725 }
2726 hso_dev->is_active = 0;
2727 return 0;
2728 }
2729
2730 /* called by kernel when we need to suspend device */
2731 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2732 {
2733 int i, result;
2734
2735 /* Stop all serial ports */
2736 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2737 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2738 result = hso_stop_serial_device(serial_table[i]);
2739 if (result)
2740 goto out;
2741 }
2742 }
2743
2744 /* Stop all network ports */
2745 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2746 if (network_table[i] &&
2747 (network_table[i]->interface == iface)) {
2748 result = hso_stop_net_device(network_table[i]);
2749 if (result)
2750 goto out;
2751 }
2752 }
2753
2754 out:
2755 return 0;
2756 }
2757
2758 /* called by kernel when we need to resume device */
2759 static int hso_resume(struct usb_interface *iface)
2760 {
2761 int i, result = 0;
2762 struct hso_net *hso_net;
2763
2764 /* Start all serial ports */
2765 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2766 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2767 if (dev2ser(serial_table[i])->open_count) {
2768 result =
2769 hso_start_serial_device(serial_table[i], GFP_NOIO);
2770 hso_kick_transmit(dev2ser(serial_table[i]));
2771 if (result)
2772 goto out;
2773 }
2774 }
2775 }
2776
2777 /* Start all network ports */
2778 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2779 if (network_table[i] &&
2780 (network_table[i]->interface == iface)) {
2781 hso_net = dev2net(network_table[i]);
2782 if (hso_net->flags & IFF_UP) {
2783 /* First transmit any lingering data,
2784 then restart the device. */
2785 if (hso_net->skb_tx_buf) {
2786 dev_dbg(&iface->dev,
2787 "Transmitting"
2788 " lingering data\n");
2789 hso_net_start_xmit(hso_net->skb_tx_buf,
2790 hso_net->net);
2791 hso_net->skb_tx_buf = NULL;
2792 }
2793 result = hso_start_net_device(network_table[i]);
2794 if (result)
2795 goto out;
2796 }
2797 }
2798 }
2799
2800 out:
2801 return result;
2802 }
2803
2804 static void hso_serial_ref_free(struct kref *ref)
2805 {
2806 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2807
2808 hso_free_serial_device(hso_dev);
2809 }
2810
2811 static void hso_free_interface(struct usb_interface *interface)
2812 {
2813 struct hso_serial *hso_dev;
2814 struct tty_struct *tty;
2815 int i;
2816
2817 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2818 if (serial_table[i]
2819 && (serial_table[i]->interface == interface)) {
2820 hso_dev = dev2ser(serial_table[i]);
2821 spin_lock_irq(&hso_dev->serial_lock);
2822 tty = tty_kref_get(hso_dev->tty);
2823 spin_unlock_irq(&hso_dev->serial_lock);
2824 if (tty)
2825 tty_hangup(tty);
2826 mutex_lock(&hso_dev->parent->mutex);
2827 tty_kref_put(tty);
2828 hso_dev->parent->usb_gone = 1;
2829 mutex_unlock(&hso_dev->parent->mutex);
2830 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
2831 }
2832 }
2833
2834 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2835 if (network_table[i]
2836 && (network_table[i]->interface == interface)) {
2837 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2838 /* hso_stop_net_device doesn't stop the net queue since
2839 * traffic needs to start it again when suspended */
2840 netif_stop_queue(dev2net(network_table[i])->net);
2841 hso_stop_net_device(network_table[i]);
2842 cancel_work_sync(&network_table[i]->async_put_intf);
2843 cancel_work_sync(&network_table[i]->async_get_intf);
2844 if (rfk)
2845 rfkill_unregister(rfk);
2846 hso_free_net_device(network_table[i]);
2847 }
2848 }
2849 }
2850
2851 /* Helper functions */
2852
2853 /* Get the endpoint ! */
2854 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2855 int type, int dir)
2856 {
2857 int i;
2858 struct usb_host_interface *iface = intf->cur_altsetting;
2859 struct usb_endpoint_descriptor *endp;
2860
2861 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2862 endp = &iface->endpoint[i].desc;
2863 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2864 (usb_endpoint_type(endp) == type))
2865 return endp;
2866 }
2867
2868 return NULL;
2869 }
2870
2871 /* Get the byte that describes which ports are enabled */
2872 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2873 {
2874 int i;
2875 struct usb_host_interface *iface = intf->cur_altsetting;
2876
2877 if (iface->extralen == 3) {
2878 *ports = iface->extra[2];
2879 return 0;
2880 }
2881
2882 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2883 if (iface->endpoint[i].extralen == 3) {
2884 *ports = iface->endpoint[i].extra[2];
2885 return 0;
2886 }
2887 }
2888
2889 return -1;
2890 }
2891
2892 /* interrupt urb needs to be submitted, used for serial read of muxed port */
2893 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2894 struct usb_device *usb, gfp_t gfp)
2895 {
2896 int result;
2897
2898 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2899 usb_rcvintpipe(usb,
2900 shared_int->intr_endp->bEndpointAddress & 0x7F),
2901 shared_int->shared_intr_buf,
2902 shared_int->intr_endp->wMaxPacketSize,
2903 intr_callback, shared_int,
2904 shared_int->intr_endp->bInterval);
2905
2906 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2907 if (result)
2908 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2909 result);
2910
2911 return result;
2912 }
2913
2914 /* operations setup of the serial interface */
2915 static const struct tty_operations hso_serial_ops = {
2916 .open = hso_serial_open,
2917 .close = hso_serial_close,
2918 .write = hso_serial_write,
2919 .write_room = hso_serial_write_room,
2920 .set_termios = hso_serial_set_termios,
2921 .chars_in_buffer = hso_serial_chars_in_buffer,
2922 .tiocmget = hso_serial_tiocmget,
2923 .tiocmset = hso_serial_tiocmset,
2924 .unthrottle = hso_unthrottle
2925 };
2926
2927 static struct usb_driver hso_driver = {
2928 .name = driver_name,
2929 .probe = hso_probe,
2930 .disconnect = hso_disconnect,
2931 .id_table = hso_ids,
2932 .suspend = hso_suspend,
2933 .resume = hso_resume,
2934 .reset_resume = hso_resume,
2935 .supports_autosuspend = 1,
2936 };
2937
2938 static int __init hso_init(void)
2939 {
2940 int i;
2941 int result;
2942
2943 /* put it in the log */
2944 printk(KERN_INFO "hso: %s\n", version);
2945
2946 /* Initialise the serial table semaphore and table */
2947 spin_lock_init(&serial_table_lock);
2948 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2949 serial_table[i] = NULL;
2950
2951 /* allocate our driver using the proper amount of supported minors */
2952 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2953 if (!tty_drv)
2954 return -ENOMEM;
2955
2956 /* fill in all needed values */
2957 tty_drv->magic = TTY_DRIVER_MAGIC;
2958 tty_drv->owner = THIS_MODULE;
2959 tty_drv->driver_name = driver_name;
2960 tty_drv->name = tty_filename;
2961
2962 /* if major number is provided as parameter, use that one */
2963 if (tty_major)
2964 tty_drv->major = tty_major;
2965
2966 tty_drv->minor_start = 0;
2967 tty_drv->num = HSO_SERIAL_TTY_MINORS;
2968 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
2969 tty_drv->subtype = SERIAL_TYPE_NORMAL;
2970 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2971 tty_drv->init_termios = tty_std_termios;
2972 tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2973 tty_drv->termios = hso_serial_termios;
2974 tty_drv->termios_locked = hso_serial_termios_locked;
2975 tty_set_operations(tty_drv, &hso_serial_ops);
2976
2977 /* register the tty driver */
2978 result = tty_register_driver(tty_drv);
2979 if (result) {
2980 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
2981 __func__, result);
2982 return result;
2983 }
2984
2985 /* register this module as an usb driver */
2986 result = usb_register(&hso_driver);
2987 if (result) {
2988 printk(KERN_ERR "Could not register hso driver? error: %d\n",
2989 result);
2990 /* cleanup serial interface */
2991 tty_unregister_driver(tty_drv);
2992 return result;
2993 }
2994
2995 /* done */
2996 return 0;
2997 }
2998
2999 static void __exit hso_exit(void)
3000 {
3001 printk(KERN_INFO "hso: unloaded\n");
3002
3003 tty_unregister_driver(tty_drv);
3004 /* deregister the usb driver */
3005 usb_deregister(&hso_driver);
3006 }
3007
3008 /* Module definitions */
3009 module_init(hso_init);
3010 module_exit(hso_exit);
3011
3012 MODULE_AUTHOR(MOD_AUTHOR);
3013 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3014 MODULE_LICENSE(MOD_LICENSE);
3015 MODULE_INFO(Version, DRIVER_VERSION);
3016
3017 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3018 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3019 module_param(debug, int, S_IRUGO | S_IWUSR);
3020
3021 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3022 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3023 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3024
3025 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3026 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3027 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linus' kernel tree