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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/tty.h>
62 #include <linux/tty_driver.h>
63 #include <linux/tty_flip.h>
64 #include <linux/kmod.h>
65 #include <linux/rfkill.h>
66 #include <linux/ip.h>
67 #include <linux/uaccess.h>
68 #include <linux/usb/cdc.h>
69 #include <net/arp.h>
70 #include <asm/byteorder.h>
71 #include <linux/serial_core.h>
72 #include <linux/serial.h>
73
74
75 #define MOD_AUTHOR "Option Wireless"
76 #define MOD_DESCRIPTION "USB High Speed Option driver"
77 #define MOD_LICENSE "GPL"
78
79 #define HSO_MAX_NET_DEVICES 10
80 #define HSO__MAX_MTU 2048
81 #define DEFAULT_MTU 1500
82 #define DEFAULT_MRU 1500
83
84 #define CTRL_URB_RX_SIZE 1024
85 #define CTRL_URB_TX_SIZE 64
86
87 #define BULK_URB_RX_SIZE 4096
88 #define BULK_URB_TX_SIZE 8192
89
90 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
91 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_RX_BUF_COUNT 4
93 #define USB_TYPE_OPTION_VENDOR 0x20
94
95 /* These definitions are used with the struct hso_net flags element */
96 /* - use *_bit operations on it. (bit indices not values.) */
97 #define HSO_NET_RUNNING 0
98
99 #define HSO_NET_TX_TIMEOUT (HZ*10)
100
101 #define HSO_SERIAL_MAGIC 0x48534f31
102
103 /* Number of ttys to handle */
104 #define HSO_SERIAL_TTY_MINORS 256
105
106 #define MAX_RX_URBS 2
107
108 /*****************************************************************************/
109 /* Debugging functions */
110 /*****************************************************************************/
111 #define D__(lvl_, fmt, arg...) \
112 do { \
113 printk(lvl_ "[%d:%s]: " fmt "\n", \
114 __LINE__, __func__, ## arg); \
115 } while (0)
116
117 #define D_(lvl, args...) \
118 do { \
119 if (lvl & debug) \
120 D__(KERN_INFO, args); \
121 } while (0)
122
123 #define D1(args...) D_(0x01, ##args)
124 #define D2(args...) D_(0x02, ##args)
125 #define D3(args...) D_(0x04, ##args)
126 #define D4(args...) D_(0x08, ##args)
127 #define D5(args...) D_(0x10, ##args)
128
129 /*****************************************************************************/
130 /* Enumerators */
131 /*****************************************************************************/
132 enum pkt_parse_state {
133 WAIT_IP,
134 WAIT_DATA,
135 WAIT_SYNC
136 };
137
138 /*****************************************************************************/
139 /* Structs */
140 /*****************************************************************************/
141
142 struct hso_shared_int {
143 struct usb_endpoint_descriptor *intr_endp;
144 void *shared_intr_buf;
145 struct urb *shared_intr_urb;
146 struct usb_device *usb;
147 int use_count;
148 int ref_count;
149 struct mutex shared_int_lock;
150 };
151
152 struct hso_net {
153 struct hso_device *parent;
154 struct net_device *net;
155 struct rfkill *rfkill;
156 char name[24];
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_LENGTH (0x2)
189
190 #define B_OVERRUN (0x1<<6)
191 #define B_PARITY (0x1<<5)
192 #define B_FRAMING (0x1<<4)
193 #define B_RING_SIGNAL (0x1<<3)
194 #define B_BREAK (0x1<<2)
195 #define B_TX_CARRIER (0x1<<1)
196 #define B_RX_CARRIER (0x1<<0)
197
198 struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
205 } __packed;
206
207 struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216 };
217
218
219 struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
245 enum rx_ctrl_state rx_state;
246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
250 struct tty_port port;
251 /* from usb_serial_port */
252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
255 struct hso_tiocmget *tiocmget;
256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
261 u8 rx_urb_filled[MAX_RX_URBS];
262 struct tasklet_struct unthrottle_tasklet;
263 };
264
265 struct hso_device {
266 union {
267 struct hso_serial *dev_serial;
268 struct hso_net *dev_net;
269 } port_data;
270
271 u32 port_spec;
272
273 u8 is_active;
274 u8 usb_gone;
275 struct work_struct async_get_intf;
276 struct work_struct async_put_intf;
277
278 struct usb_device *usb;
279 struct usb_interface *interface;
280
281 struct device *dev;
282 struct kref ref;
283 struct mutex mutex;
284 };
285
286 /* Type of interface */
287 #define HSO_INTF_MASK 0xFF00
288 #define HSO_INTF_MUX 0x0100
289 #define HSO_INTF_BULK 0x0200
290
291 /* Type of port */
292 #define HSO_PORT_MASK 0xFF
293 #define HSO_PORT_NO_PORT 0x0
294 #define HSO_PORT_CONTROL 0x1
295 #define HSO_PORT_APP 0x2
296 #define HSO_PORT_GPS 0x3
297 #define HSO_PORT_PCSC 0x4
298 #define HSO_PORT_APP2 0x5
299 #define HSO_PORT_GPS_CONTROL 0x6
300 #define HSO_PORT_MSD 0x7
301 #define HSO_PORT_VOICE 0x8
302 #define HSO_PORT_DIAG2 0x9
303 #define HSO_PORT_DIAG 0x10
304 #define HSO_PORT_MODEM 0x11
305 #define HSO_PORT_NETWORK 0x12
306
307 /* Additional device info */
308 #define HSO_INFO_MASK 0xFF000000
309 #define HSO_INFO_CRC_BUG 0x01000000
310
311 /*****************************************************************************/
312 /* Prototypes */
313 /*****************************************************************************/
314 /* Serial driver functions */
315 static int hso_serial_tiocmset(struct tty_struct *tty,
316 unsigned int set, unsigned int clear);
317 static void ctrl_callback(struct urb *urb);
318 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
319 static void hso_kick_transmit(struct hso_serial *serial);
320 /* Helper functions */
321 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
322 struct usb_device *usb, gfp_t gfp);
323 static void handle_usb_error(int status, const char *function,
324 struct hso_device *hso_dev);
325 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
326 int type, int dir);
327 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
328 static void hso_free_interface(struct usb_interface *intf);
329 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
330 static int hso_stop_serial_device(struct hso_device *hso_dev);
331 static int hso_start_net_device(struct hso_device *hso_dev);
332 static void hso_free_shared_int(struct hso_shared_int *shared_int);
333 static int hso_stop_net_device(struct hso_device *hso_dev);
334 static void hso_serial_ref_free(struct kref *ref);
335 static void hso_std_serial_read_bulk_callback(struct urb *urb);
336 static int hso_mux_serial_read(struct hso_serial *serial);
337 static void async_get_intf(struct work_struct *data);
338 static void async_put_intf(struct work_struct *data);
339 static int hso_put_activity(struct hso_device *hso_dev);
340 static int hso_get_activity(struct hso_device *hso_dev);
341 static void tiocmget_intr_callback(struct urb *urb);
342 /*****************************************************************************/
343 /* Helping functions */
344 /*****************************************************************************/
345
346 /* #define DEBUG */
347
348 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
349 {
350 return hso_dev->port_data.dev_net;
351 }
352
353 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
354 {
355 return hso_dev->port_data.dev_serial;
356 }
357
358 /* Debugging functions */
359 #ifdef DEBUG
360 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
361 unsigned int len)
362 {
363 static char name[255];
364
365 sprintf(name, "hso[%d:%s]", line_count, func_name);
366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
367 }
368
369 #define DUMP(buf_, len_) \
370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
371
372 #define DUMP1(buf_, len_) \
373 do { \
374 if (0x01 & debug) \
375 DUMP(buf_, len_); \
376 } while (0)
377 #else
378 #define DUMP(buf_, len_)
379 #define DUMP1(buf_, len_)
380 #endif
381
382 /* module parameters */
383 static int debug;
384 static int tty_major;
385 static int disable_net;
386
387 /* driver info */
388 static const char driver_name[] = "hso";
389 static const char tty_filename[] = "ttyHS";
390 static const char *version = __FILE__ ": " MOD_AUTHOR;
391 /* the usb driver itself (registered in hso_init) */
392 static struct usb_driver hso_driver;
393 /* serial structures */
394 static struct tty_driver *tty_drv;
395 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
396 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
397 static spinlock_t serial_table_lock;
398
399 static const s32 default_port_spec[] = {
400 HSO_INTF_MUX | HSO_PORT_NETWORK,
401 HSO_INTF_BULK | HSO_PORT_DIAG,
402 HSO_INTF_BULK | HSO_PORT_MODEM,
403 0
404 };
405
406 static const s32 icon321_port_spec[] = {
407 HSO_INTF_MUX | HSO_PORT_NETWORK,
408 HSO_INTF_BULK | HSO_PORT_DIAG2,
409 HSO_INTF_BULK | HSO_PORT_MODEM,
410 HSO_INTF_BULK | HSO_PORT_DIAG,
411 0
412 };
413
414 #define default_port_device(vendor, product) \
415 USB_DEVICE(vendor, product), \
416 .driver_info = (kernel_ulong_t)default_port_spec
417
418 #define icon321_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)icon321_port_spec
421
422 /* list of devices we support */
423 static const struct usb_device_id hso_ids[] = {
424 {default_port_device(0x0af0, 0x6711)},
425 {default_port_device(0x0af0, 0x6731)},
426 {default_port_device(0x0af0, 0x6751)},
427 {default_port_device(0x0af0, 0x6771)},
428 {default_port_device(0x0af0, 0x6791)},
429 {default_port_device(0x0af0, 0x6811)},
430 {default_port_device(0x0af0, 0x6911)},
431 {default_port_device(0x0af0, 0x6951)},
432 {default_port_device(0x0af0, 0x6971)},
433 {default_port_device(0x0af0, 0x7011)},
434 {default_port_device(0x0af0, 0x7031)},
435 {default_port_device(0x0af0, 0x7051)},
436 {default_port_device(0x0af0, 0x7071)},
437 {default_port_device(0x0af0, 0x7111)},
438 {default_port_device(0x0af0, 0x7211)},
439 {default_port_device(0x0af0, 0x7251)},
440 {default_port_device(0x0af0, 0x7271)},
441 {default_port_device(0x0af0, 0x7311)},
442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7701)},
453 {USB_DEVICE(0x0af0, 0x7706)},
454 {USB_DEVICE(0x0af0, 0x7801)},
455 {USB_DEVICE(0x0af0, 0x7901)},
456 {USB_DEVICE(0x0af0, 0x7A01)},
457 {USB_DEVICE(0x0af0, 0x7A05)},
458 {USB_DEVICE(0x0af0, 0x8200)},
459 {USB_DEVICE(0x0af0, 0x8201)},
460 {USB_DEVICE(0x0af0, 0x8300)},
461 {USB_DEVICE(0x0af0, 0x8302)},
462 {USB_DEVICE(0x0af0, 0x8304)},
463 {USB_DEVICE(0x0af0, 0x8400)},
464 {USB_DEVICE(0x0af0, 0x8600)},
465 {USB_DEVICE(0x0af0, 0x8800)},
466 {USB_DEVICE(0x0af0, 0x8900)},
467 {USB_DEVICE(0x0af0, 0x9000)},
468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
469 {USB_DEVICE(0x0af0, 0xd035)},
470 {USB_DEVICE(0x0af0, 0xd055)},
471 {USB_DEVICE(0x0af0, 0xd155)},
472 {USB_DEVICE(0x0af0, 0xd255)},
473 {USB_DEVICE(0x0af0, 0xd057)},
474 {USB_DEVICE(0x0af0, 0xd157)},
475 {USB_DEVICE(0x0af0, 0xd257)},
476 {USB_DEVICE(0x0af0, 0xd357)},
477 {USB_DEVICE(0x0af0, 0xd058)},
478 {USB_DEVICE(0x0af0, 0xc100)},
479 {}
480 };
481 MODULE_DEVICE_TABLE(usb, hso_ids);
482
483 /* Sysfs attribute */
484 static ssize_t hso_sysfs_show_porttype(struct device *dev,
485 struct device_attribute *attr,
486 char *buf)
487 {
488 struct hso_device *hso_dev = dev_get_drvdata(dev);
489 char *port_name;
490
491 if (!hso_dev)
492 return 0;
493
494 switch (hso_dev->port_spec & HSO_PORT_MASK) {
495 case HSO_PORT_CONTROL:
496 port_name = "Control";
497 break;
498 case HSO_PORT_APP:
499 port_name = "Application";
500 break;
501 case HSO_PORT_APP2:
502 port_name = "Application2";
503 break;
504 case HSO_PORT_GPS:
505 port_name = "GPS";
506 break;
507 case HSO_PORT_GPS_CONTROL:
508 port_name = "GPS Control";
509 break;
510 case HSO_PORT_PCSC:
511 port_name = "PCSC";
512 break;
513 case HSO_PORT_DIAG:
514 port_name = "Diagnostic";
515 break;
516 case HSO_PORT_DIAG2:
517 port_name = "Diagnostic2";
518 break;
519 case HSO_PORT_MODEM:
520 port_name = "Modem";
521 break;
522 case HSO_PORT_NETWORK:
523 port_name = "Network";
524 break;
525 default:
526 port_name = "Unknown";
527 break;
528 }
529
530 return sprintf(buf, "%s\n", port_name);
531 }
532 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
533
534 static struct attribute *hso_serial_dev_attrs[] = {
535 &dev_attr_hsotype.attr,
536 NULL
537 };
538
539 ATTRIBUTE_GROUPS(hso_serial_dev);
540
541 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
542 {
543 int idx;
544
545 for (idx = 0; idx < serial->num_rx_urbs; idx++)
546 if (serial->rx_urb[idx] == urb)
547 return idx;
548 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
549 return -1;
550 }
551
552 /* converts mux value to a port spec value */
553 static u32 hso_mux_to_port(int mux)
554 {
555 u32 result;
556
557 switch (mux) {
558 case 0x1:
559 result = HSO_PORT_CONTROL;
560 break;
561 case 0x2:
562 result = HSO_PORT_APP;
563 break;
564 case 0x4:
565 result = HSO_PORT_PCSC;
566 break;
567 case 0x8:
568 result = HSO_PORT_GPS;
569 break;
570 case 0x10:
571 result = HSO_PORT_APP2;
572 break;
573 default:
574 result = HSO_PORT_NO_PORT;
575 }
576 return result;
577 }
578
579 /* converts port spec value to a mux value */
580 static u32 hso_port_to_mux(int port)
581 {
582 u32 result;
583
584 switch (port & HSO_PORT_MASK) {
585 case HSO_PORT_CONTROL:
586 result = 0x0;
587 break;
588 case HSO_PORT_APP:
589 result = 0x1;
590 break;
591 case HSO_PORT_PCSC:
592 result = 0x2;
593 break;
594 case HSO_PORT_GPS:
595 result = 0x3;
596 break;
597 case HSO_PORT_APP2:
598 result = 0x4;
599 break;
600 default:
601 result = 0x0;
602 }
603 return result;
604 }
605
606 static struct hso_serial *get_serial_by_shared_int_and_type(
607 struct hso_shared_int *shared_int,
608 int mux)
609 {
610 int i, port;
611
612 port = hso_mux_to_port(mux);
613
614 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
615 if (serial_table[i] &&
616 (dev2ser(serial_table[i])->shared_int == shared_int) &&
617 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
618 return dev2ser(serial_table[i]);
619 }
620 }
621
622 return NULL;
623 }
624
625 static struct hso_serial *get_serial_by_index(unsigned index)
626 {
627 struct hso_serial *serial = NULL;
628 unsigned long flags;
629
630 spin_lock_irqsave(&serial_table_lock, flags);
631 if (serial_table[index])
632 serial = dev2ser(serial_table[index]);
633 spin_unlock_irqrestore(&serial_table_lock, flags);
634
635 return serial;
636 }
637
638 static int get_free_serial_index(void)
639 {
640 int index;
641 unsigned long flags;
642
643 spin_lock_irqsave(&serial_table_lock, flags);
644 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
645 if (serial_table[index] == NULL) {
646 spin_unlock_irqrestore(&serial_table_lock, flags);
647 return index;
648 }
649 }
650 spin_unlock_irqrestore(&serial_table_lock, flags);
651
652 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
653 return -1;
654 }
655
656 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
657 {
658 unsigned long flags;
659
660 spin_lock_irqsave(&serial_table_lock, flags);
661 if (serial)
662 serial_table[index] = serial->parent;
663 else
664 serial_table[index] = NULL;
665 spin_unlock_irqrestore(&serial_table_lock, flags);
666 }
667
668 static void handle_usb_error(int status, const char *function,
669 struct hso_device *hso_dev)
670 {
671 char *explanation;
672
673 switch (status) {
674 case -ENODEV:
675 explanation = "no device";
676 break;
677 case -ENOENT:
678 explanation = "endpoint not enabled";
679 break;
680 case -EPIPE:
681 explanation = "endpoint stalled";
682 break;
683 case -ENOSPC:
684 explanation = "not enough bandwidth";
685 break;
686 case -ESHUTDOWN:
687 explanation = "device disabled";
688 break;
689 case -EHOSTUNREACH:
690 explanation = "device suspended";
691 break;
692 case -EINVAL:
693 case -EAGAIN:
694 case -EFBIG:
695 case -EMSGSIZE:
696 explanation = "internal error";
697 break;
698 case -EILSEQ:
699 case -EPROTO:
700 case -ETIME:
701 case -ETIMEDOUT:
702 explanation = "protocol error";
703 if (hso_dev)
704 usb_queue_reset_device(hso_dev->interface);
705 break;
706 default:
707 explanation = "unknown status";
708 break;
709 }
710
711 /* log a meaningful explanation of an USB status */
712 D1("%s: received USB status - %s (%d)", function, explanation, status);
713 }
714
715 /* Network interface functions */
716
717 /* called when net interface is brought up by ifconfig */
718 static int hso_net_open(struct net_device *net)
719 {
720 struct hso_net *odev = netdev_priv(net);
721 unsigned long flags = 0;
722
723 if (!odev) {
724 dev_err(&net->dev, "No net device !\n");
725 return -ENODEV;
726 }
727
728 odev->skb_tx_buf = NULL;
729
730 /* setup environment */
731 spin_lock_irqsave(&odev->net_lock, flags);
732 odev->rx_parse_state = WAIT_IP;
733 odev->rx_buf_size = 0;
734 odev->rx_buf_missing = sizeof(struct iphdr);
735 spin_unlock_irqrestore(&odev->net_lock, flags);
736
737 /* We are up and running. */
738 set_bit(HSO_NET_RUNNING, &odev->flags);
739 hso_start_net_device(odev->parent);
740
741 /* Tell the kernel we are ready to start receiving from it */
742 netif_start_queue(net);
743
744 return 0;
745 }
746
747 /* called when interface is brought down by ifconfig */
748 static int hso_net_close(struct net_device *net)
749 {
750 struct hso_net *odev = netdev_priv(net);
751
752 /* we don't need the queue anymore */
753 netif_stop_queue(net);
754 /* no longer running */
755 clear_bit(HSO_NET_RUNNING, &odev->flags);
756
757 hso_stop_net_device(odev->parent);
758
759 /* done */
760 return 0;
761 }
762
763 /* USB tells is xmit done, we should start the netqueue again */
764 static void write_bulk_callback(struct urb *urb)
765 {
766 struct hso_net *odev = urb->context;
767 int status = urb->status;
768
769 /* Sanity check */
770 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
771 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
772 return;
773 }
774
775 /* Do we still have a valid kernel network device? */
776 if (!netif_device_present(odev->net)) {
777 dev_err(&urb->dev->dev, "%s: net device not present\n",
778 __func__);
779 return;
780 }
781
782 /* log status, but don't act on it, we don't need to resubmit anything
783 * anyhow */
784 if (status)
785 handle_usb_error(status, __func__, odev->parent);
786
787 hso_put_activity(odev->parent);
788
789 /* Tell the network interface we are ready for another frame */
790 netif_wake_queue(odev->net);
791 }
792
793 /* called by kernel when we need to transmit a packet */
794 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
795 struct net_device *net)
796 {
797 struct hso_net *odev = netdev_priv(net);
798 int result;
799
800 /* Tell the kernel, "No more frames 'til we are done with this one." */
801 netif_stop_queue(net);
802 if (hso_get_activity(odev->parent) == -EAGAIN) {
803 odev->skb_tx_buf = skb;
804 return NETDEV_TX_OK;
805 }
806
807 /* log if asked */
808 DUMP1(skb->data, skb->len);
809 /* Copy it from kernel memory to OUR memory */
810 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
811 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
812
813 /* Fill in the URB for shipping it out. */
814 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
815 odev->parent->usb,
816 usb_sndbulkpipe(odev->parent->usb,
817 odev->out_endp->
818 bEndpointAddress & 0x7F),
819 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
820 odev);
821
822 /* Deal with the Zero Length packet problem, I hope */
823 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
824
825 /* Send the URB on its merry way. */
826 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
827 if (result) {
828 dev_warn(&odev->parent->interface->dev,
829 "failed mux_bulk_tx_urb %d\n", result);
830 net->stats.tx_errors++;
831 netif_start_queue(net);
832 } else {
833 net->stats.tx_packets++;
834 net->stats.tx_bytes += skb->len;
835 }
836 dev_kfree_skb(skb);
837 /* we're done */
838 return NETDEV_TX_OK;
839 }
840
841 static const struct ethtool_ops ops = {
842 .get_link = ethtool_op_get_link
843 };
844
845 /* called when a packet did not ack after watchdogtimeout */
846 static void hso_net_tx_timeout(struct net_device *net)
847 {
848 struct hso_net *odev = netdev_priv(net);
849
850 if (!odev)
851 return;
852
853 /* Tell syslog we are hosed. */
854 dev_warn(&net->dev, "Tx timed out.\n");
855
856 /* Tear the waiting frame off the list */
857 if (odev->mux_bulk_tx_urb &&
858 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
859 usb_unlink_urb(odev->mux_bulk_tx_urb);
860
861 /* Update statistics */
862 net->stats.tx_errors++;
863 }
864
865 /* make a real packet from the received USB buffer */
866 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
867 unsigned int count, unsigned char is_eop)
868 {
869 unsigned short temp_bytes;
870 unsigned short buffer_offset = 0;
871 unsigned short frame_len;
872 unsigned char *tmp_rx_buf;
873
874 /* log if needed */
875 D1("Rx %d bytes", count);
876 DUMP(ip_pkt, min(128, (int)count));
877
878 while (count) {
879 switch (odev->rx_parse_state) {
880 case WAIT_IP:
881 /* waiting for IP header. */
882 /* wanted bytes - size of ip header */
883 temp_bytes =
884 (count <
885 odev->rx_buf_missing) ? count : odev->
886 rx_buf_missing;
887
888 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
889 odev->rx_buf_size, ip_pkt + buffer_offset,
890 temp_bytes);
891
892 odev->rx_buf_size += temp_bytes;
893 buffer_offset += temp_bytes;
894 odev->rx_buf_missing -= temp_bytes;
895 count -= temp_bytes;
896
897 if (!odev->rx_buf_missing) {
898 /* header is complete allocate an sk_buffer and
899 * continue to WAIT_DATA */
900 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
901
902 if ((frame_len > DEFAULT_MRU) ||
903 (frame_len < sizeof(struct iphdr))) {
904 dev_err(&odev->net->dev,
905 "Invalid frame (%d) length\n",
906 frame_len);
907 odev->rx_parse_state = WAIT_SYNC;
908 continue;
909 }
910 /* Allocate an sk_buff */
911 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
912 frame_len);
913 if (!odev->skb_rx_buf) {
914 /* We got no receive buffer. */
915 D1("could not allocate memory");
916 odev->rx_parse_state = WAIT_SYNC;
917 continue;
918 }
919
920 /* Copy what we got so far. make room for iphdr
921 * after tail. */
922 tmp_rx_buf =
923 skb_put(odev->skb_rx_buf,
924 sizeof(struct iphdr));
925 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
926 sizeof(struct iphdr));
927
928 /* ETH_HLEN */
929 odev->rx_buf_size = sizeof(struct iphdr);
930
931 /* Filip actually use .tot_len */
932 odev->rx_buf_missing =
933 frame_len - sizeof(struct iphdr);
934 odev->rx_parse_state = WAIT_DATA;
935 }
936 break;
937
938 case WAIT_DATA:
939 temp_bytes = (count < odev->rx_buf_missing)
940 ? count : odev->rx_buf_missing;
941
942 /* Copy the rest of the bytes that are left in the
943 * buffer into the waiting sk_buf. */
944 /* Make room for temp_bytes after tail. */
945 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
946 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
947
948 odev->rx_buf_missing -= temp_bytes;
949 count -= temp_bytes;
950 buffer_offset += temp_bytes;
951 odev->rx_buf_size += temp_bytes;
952 if (!odev->rx_buf_missing) {
953 /* Packet is complete. Inject into stack. */
954 /* We have IP packet here */
955 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
956 skb_reset_mac_header(odev->skb_rx_buf);
957
958 /* Ship it off to the kernel */
959 netif_rx(odev->skb_rx_buf);
960 /* No longer our buffer. */
961 odev->skb_rx_buf = NULL;
962
963 /* update out statistics */
964 odev->net->stats.rx_packets++;
965
966 odev->net->stats.rx_bytes += odev->rx_buf_size;
967
968 odev->rx_buf_size = 0;
969 odev->rx_buf_missing = sizeof(struct iphdr);
970 odev->rx_parse_state = WAIT_IP;
971 }
972 break;
973
974 case WAIT_SYNC:
975 D1(" W_S");
976 count = 0;
977 break;
978 default:
979 D1(" ");
980 count--;
981 break;
982 }
983 }
984
985 /* Recovery mechanism for WAIT_SYNC state. */
986 if (is_eop) {
987 if (odev->rx_parse_state == WAIT_SYNC) {
988 odev->rx_parse_state = WAIT_IP;
989 odev->rx_buf_size = 0;
990 odev->rx_buf_missing = sizeof(struct iphdr);
991 }
992 }
993 }
994
995 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
996 {
997 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
998 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
999
1000 if (((rest == 5) || (rest == 6)) &&
1001 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1002 crc_check, 4)) {
1003 urb->actual_length -= 4;
1004 }
1005 }
1006
1007 /* Moving data from usb to kernel (in interrupt state) */
1008 static void read_bulk_callback(struct urb *urb)
1009 {
1010 struct hso_net *odev = urb->context;
1011 struct net_device *net;
1012 int result;
1013 int status = urb->status;
1014
1015 /* is al ok? (Filip: Who's Al ?) */
1016 if (status) {
1017 handle_usb_error(status, __func__, odev->parent);
1018 return;
1019 }
1020
1021 /* Sanity check */
1022 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1023 D1("BULK IN callback but driver is not active!");
1024 return;
1025 }
1026 usb_mark_last_busy(urb->dev);
1027
1028 net = odev->net;
1029
1030 if (!netif_device_present(net)) {
1031 /* Somebody killed our network interface... */
1032 return;
1033 }
1034
1035 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1036 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1037
1038 /* do we even have a packet? */
1039 if (urb->actual_length) {
1040 /* Handle the IP stream, add header and push it onto network
1041 * stack if the packet is complete. */
1042 spin_lock(&odev->net_lock);
1043 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1044 (urb->transfer_buffer_length >
1045 urb->actual_length) ? 1 : 0);
1046 spin_unlock(&odev->net_lock);
1047 }
1048
1049 /* We are done with this URB, resubmit it. Prep the USB to wait for
1050 * another frame. Reuse same as received. */
1051 usb_fill_bulk_urb(urb,
1052 odev->parent->usb,
1053 usb_rcvbulkpipe(odev->parent->usb,
1054 odev->in_endp->
1055 bEndpointAddress & 0x7F),
1056 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1057 read_bulk_callback, odev);
1058
1059 /* Give this to the USB subsystem so it can tell us when more data
1060 * arrives. */
1061 result = usb_submit_urb(urb, GFP_ATOMIC);
1062 if (result)
1063 dev_warn(&odev->parent->interface->dev,
1064 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1065 result);
1066 }
1067
1068 /* Serial driver functions */
1069
1070 static void hso_init_termios(struct ktermios *termios)
1071 {
1072 /*
1073 * The default requirements for this device are:
1074 */
1075 termios->c_iflag &=
1076 ~(IGNBRK /* disable ignore break */
1077 | BRKINT /* disable break causes interrupt */
1078 | PARMRK /* disable mark parity errors */
1079 | ISTRIP /* disable clear high bit of input characters */
1080 | INLCR /* disable translate NL to CR */
1081 | IGNCR /* disable ignore CR */
1082 | ICRNL /* disable translate CR to NL */
1083 | IXON); /* disable enable XON/XOFF flow control */
1084
1085 /* disable postprocess output characters */
1086 termios->c_oflag &= ~OPOST;
1087
1088 termios->c_lflag &=
1089 ~(ECHO /* disable echo input characters */
1090 | ECHONL /* disable echo new line */
1091 | ICANON /* disable erase, kill, werase, and rprnt
1092 special characters */
1093 | ISIG /* disable interrupt, quit, and suspend special
1094 characters */
1095 | IEXTEN); /* disable non-POSIX special characters */
1096
1097 termios->c_cflag &=
1098 ~(CSIZE /* no size */
1099 | PARENB /* disable parity bit */
1100 | CBAUD /* clear current baud rate */
1101 | CBAUDEX); /* clear current buad rate */
1102
1103 termios->c_cflag |= CS8; /* character size 8 bits */
1104
1105 /* baud rate 115200 */
1106 tty_termios_encode_baud_rate(termios, 115200, 115200);
1107 }
1108
1109 static void _hso_serial_set_termios(struct tty_struct *tty,
1110 struct ktermios *old)
1111 {
1112 struct hso_serial *serial = tty->driver_data;
1113
1114 if (!serial) {
1115 printk(KERN_ERR "%s: no tty structures", __func__);
1116 return;
1117 }
1118
1119 D4("port %d", serial->minor);
1120
1121 /*
1122 * Fix up unsupported bits
1123 */
1124 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1125
1126 tty->termios.c_cflag &=
1127 ~(CSIZE /* no size */
1128 | PARENB /* disable parity bit */
1129 | CBAUD /* clear current baud rate */
1130 | CBAUDEX); /* clear current buad rate */
1131
1132 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1133
1134 /* baud rate 115200 */
1135 tty_encode_baud_rate(tty, 115200, 115200);
1136 }
1137
1138 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1139 {
1140 int result;
1141 /* We are done with this URB, resubmit it. Prep the USB to wait for
1142 * another frame */
1143 usb_fill_bulk_urb(urb, serial->parent->usb,
1144 usb_rcvbulkpipe(serial->parent->usb,
1145 serial->in_endp->
1146 bEndpointAddress & 0x7F),
1147 urb->transfer_buffer, serial->rx_data_length,
1148 hso_std_serial_read_bulk_callback, serial);
1149 /* Give this to the USB subsystem so it can tell us when more data
1150 * arrives. */
1151 result = usb_submit_urb(urb, GFP_ATOMIC);
1152 if (result) {
1153 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1154 __func__, result);
1155 }
1156 }
1157
1158
1159
1160
1161 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1162 {
1163 int count;
1164 struct urb *curr_urb;
1165
1166 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1167 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1168 count = put_rxbuf_data(curr_urb, serial);
1169 if (count == -1)
1170 return;
1171 if (count == 0) {
1172 serial->curr_rx_urb_idx++;
1173 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1174 serial->curr_rx_urb_idx = 0;
1175 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1176 }
1177 }
1178 }
1179
1180 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1181 {
1182 int count = 0;
1183 struct urb *urb;
1184
1185 urb = serial->rx_urb[0];
1186 if (serial->port.count > 0) {
1187 count = put_rxbuf_data(urb, serial);
1188 if (count == -1)
1189 return;
1190 }
1191 /* Re issue a read as long as we receive data. */
1192
1193 if (count == 0 && ((urb->actual_length != 0) ||
1194 (serial->rx_state == RX_PENDING))) {
1195 serial->rx_state = RX_SENT;
1196 hso_mux_serial_read(serial);
1197 } else
1198 serial->rx_state = RX_IDLE;
1199 }
1200
1201
1202 /* read callback for Diag and CS port */
1203 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1204 {
1205 struct hso_serial *serial = urb->context;
1206 int status = urb->status;
1207
1208 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1209
1210 /* sanity check */
1211 if (!serial) {
1212 D1("serial == NULL");
1213 return;
1214 }
1215 if (status) {
1216 handle_usb_error(status, __func__, serial->parent);
1217 return;
1218 }
1219
1220 D1("Actual length = %d\n", urb->actual_length);
1221 DUMP1(urb->transfer_buffer, urb->actual_length);
1222
1223 /* Anyone listening? */
1224 if (serial->port.count == 0)
1225 return;
1226
1227 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1228 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1229 /* Valid data, handle RX data */
1230 spin_lock(&serial->serial_lock);
1231 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1232 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1233 spin_unlock(&serial->serial_lock);
1234 }
1235
1236 /*
1237 * This needs to be a tasklet otherwise we will
1238 * end up recursively calling this function.
1239 */
1240 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1241 {
1242 unsigned long flags;
1243
1244 spin_lock_irqsave(&serial->serial_lock, flags);
1245 if ((serial->parent->port_spec & HSO_INTF_MUX))
1246 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1247 else
1248 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1249 spin_unlock_irqrestore(&serial->serial_lock, flags);
1250 }
1251
1252 static void hso_unthrottle(struct tty_struct *tty)
1253 {
1254 struct hso_serial *serial = tty->driver_data;
1255
1256 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1257 }
1258
1259 /* open the requested serial port */
1260 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1261 {
1262 struct hso_serial *serial = get_serial_by_index(tty->index);
1263 int result;
1264
1265 /* sanity check */
1266 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1267 WARN_ON(1);
1268 tty->driver_data = NULL;
1269 D1("Failed to open port");
1270 return -ENODEV;
1271 }
1272
1273 mutex_lock(&serial->parent->mutex);
1274 result = usb_autopm_get_interface(serial->parent->interface);
1275 if (result < 0)
1276 goto err_out;
1277
1278 D1("Opening %d", serial->minor);
1279
1280 /* setup */
1281 tty->driver_data = serial;
1282 tty_port_tty_set(&serial->port, tty);
1283
1284 /* check for port already opened, if not set the termios */
1285 serial->port.count++;
1286 if (serial->port.count == 1) {
1287 serial->rx_state = RX_IDLE;
1288 /* Force default termio settings */
1289 _hso_serial_set_termios(tty, NULL);
1290 tasklet_init(&serial->unthrottle_tasklet,
1291 (void (*)(unsigned long))hso_unthrottle_tasklet,
1292 (unsigned long)serial);
1293 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1294 if (result) {
1295 hso_stop_serial_device(serial->parent);
1296 serial->port.count--;
1297 } else {
1298 kref_get(&serial->parent->ref);
1299 }
1300 } else {
1301 D1("Port was already open");
1302 }
1303
1304 usb_autopm_put_interface(serial->parent->interface);
1305
1306 /* done */
1307 if (result)
1308 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1309 err_out:
1310 mutex_unlock(&serial->parent->mutex);
1311 return result;
1312 }
1313
1314 /* close the requested serial port */
1315 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1316 {
1317 struct hso_serial *serial = tty->driver_data;
1318 u8 usb_gone;
1319
1320 D1("Closing serial port");
1321
1322 /* Open failed, no close cleanup required */
1323 if (serial == NULL)
1324 return;
1325
1326 mutex_lock(&serial->parent->mutex);
1327 usb_gone = serial->parent->usb_gone;
1328
1329 if (!usb_gone)
1330 usb_autopm_get_interface(serial->parent->interface);
1331
1332 /* reset the rts and dtr */
1333 /* do the actual close */
1334 serial->port.count--;
1335
1336 if (serial->port.count <= 0) {
1337 serial->port.count = 0;
1338 tty_port_tty_set(&serial->port, NULL);
1339 if (!usb_gone)
1340 hso_stop_serial_device(serial->parent);
1341 tasklet_kill(&serial->unthrottle_tasklet);
1342 }
1343
1344 if (!usb_gone)
1345 usb_autopm_put_interface(serial->parent->interface);
1346
1347 mutex_unlock(&serial->parent->mutex);
1348 }
1349
1350 /* close the requested serial port */
1351 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1352 int count)
1353 {
1354 struct hso_serial *serial = tty->driver_data;
1355 int space, tx_bytes;
1356 unsigned long flags;
1357
1358 /* sanity check */
1359 if (serial == NULL) {
1360 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1361 return -ENODEV;
1362 }
1363
1364 spin_lock_irqsave(&serial->serial_lock, flags);
1365
1366 space = serial->tx_data_length - serial->tx_buffer_count;
1367 tx_bytes = (count < space) ? count : space;
1368
1369 if (!tx_bytes)
1370 goto out;
1371
1372 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1373 serial->tx_buffer_count += tx_bytes;
1374
1375 out:
1376 spin_unlock_irqrestore(&serial->serial_lock, flags);
1377
1378 hso_kick_transmit(serial);
1379 /* done */
1380 return tx_bytes;
1381 }
1382
1383 /* how much room is there for writing */
1384 static int hso_serial_write_room(struct tty_struct *tty)
1385 {
1386 struct hso_serial *serial = tty->driver_data;
1387 int room;
1388 unsigned long flags;
1389
1390 spin_lock_irqsave(&serial->serial_lock, flags);
1391 room = serial->tx_data_length - serial->tx_buffer_count;
1392 spin_unlock_irqrestore(&serial->serial_lock, flags);
1393
1394 /* return free room */
1395 return room;
1396 }
1397
1398 static void hso_serial_cleanup(struct tty_struct *tty)
1399 {
1400 struct hso_serial *serial = tty->driver_data;
1401
1402 if (!serial)
1403 return;
1404
1405 kref_put(&serial->parent->ref, hso_serial_ref_free);
1406 }
1407
1408 /* setup the term */
1409 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1410 {
1411 struct hso_serial *serial = tty->driver_data;
1412 unsigned long flags;
1413
1414 if (old)
1415 D5("Termios called with: cflags new[%d] - old[%d]",
1416 tty->termios.c_cflag, old->c_cflag);
1417
1418 /* the actual setup */
1419 spin_lock_irqsave(&serial->serial_lock, flags);
1420 if (serial->port.count)
1421 _hso_serial_set_termios(tty, old);
1422 else
1423 tty->termios = *old;
1424 spin_unlock_irqrestore(&serial->serial_lock, flags);
1425
1426 /* done */
1427 }
1428
1429 /* how many characters in the buffer */
1430 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1431 {
1432 struct hso_serial *serial = tty->driver_data;
1433 int chars;
1434 unsigned long flags;
1435
1436 /* sanity check */
1437 if (serial == NULL)
1438 return 0;
1439
1440 spin_lock_irqsave(&serial->serial_lock, flags);
1441 chars = serial->tx_buffer_count;
1442 spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444 return chars;
1445 }
1446 static int tiocmget_submit_urb(struct hso_serial *serial,
1447 struct hso_tiocmget *tiocmget,
1448 struct usb_device *usb)
1449 {
1450 int result;
1451
1452 if (serial->parent->usb_gone)
1453 return -ENODEV;
1454 usb_fill_int_urb(tiocmget->urb, usb,
1455 usb_rcvintpipe(usb,
1456 tiocmget->endp->
1457 bEndpointAddress & 0x7F),
1458 &tiocmget->serial_state_notification,
1459 sizeof(struct hso_serial_state_notification),
1460 tiocmget_intr_callback, serial,
1461 tiocmget->endp->bInterval);
1462 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1463 if (result) {
1464 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1465 result);
1466 }
1467 return result;
1468
1469 }
1470
1471 static void tiocmget_intr_callback(struct urb *urb)
1472 {
1473 struct hso_serial *serial = urb->context;
1474 struct hso_tiocmget *tiocmget;
1475 int status = urb->status;
1476 u16 UART_state_bitmap, prev_UART_state_bitmap;
1477 struct uart_icount *icount;
1478 struct hso_serial_state_notification *serial_state_notification;
1479 struct usb_device *usb;
1480 struct usb_interface *interface;
1481 int if_num;
1482
1483 /* Sanity checks */
1484 if (!serial)
1485 return;
1486 if (status) {
1487 handle_usb_error(status, __func__, serial->parent);
1488 return;
1489 }
1490
1491 /* tiocmget is only supported on HSO_PORT_MODEM */
1492 tiocmget = serial->tiocmget;
1493 if (!tiocmget)
1494 return;
1495 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1496
1497 usb = serial->parent->usb;
1498 interface = serial->parent->interface;
1499
1500 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1501
1502 /* wIndex should be the USB interface number of the port to which the
1503 * notification applies, which should always be the Modem port.
1504 */
1505 serial_state_notification = &tiocmget->serial_state_notification;
1506 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1507 serial_state_notification->bNotification != B_NOTIFICATION ||
1508 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1509 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1510 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1511 dev_warn(&usb->dev,
1512 "hso received invalid serial state notification\n");
1513 DUMP(serial_state_notification,
1514 sizeof(struct hso_serial_state_notification));
1515 } else {
1516
1517 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1518 UART_state_bitmap);
1519 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1520 icount = &tiocmget->icount;
1521 spin_lock(&serial->serial_lock);
1522 if ((UART_state_bitmap & B_OVERRUN) !=
1523 (prev_UART_state_bitmap & B_OVERRUN))
1524 icount->parity++;
1525 if ((UART_state_bitmap & B_PARITY) !=
1526 (prev_UART_state_bitmap & B_PARITY))
1527 icount->parity++;
1528 if ((UART_state_bitmap & B_FRAMING) !=
1529 (prev_UART_state_bitmap & B_FRAMING))
1530 icount->frame++;
1531 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1532 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1533 icount->rng++;
1534 if ((UART_state_bitmap & B_BREAK) !=
1535 (prev_UART_state_bitmap & B_BREAK))
1536 icount->brk++;
1537 if ((UART_state_bitmap & B_TX_CARRIER) !=
1538 (prev_UART_state_bitmap & B_TX_CARRIER))
1539 icount->dsr++;
1540 if ((UART_state_bitmap & B_RX_CARRIER) !=
1541 (prev_UART_state_bitmap & B_RX_CARRIER))
1542 icount->dcd++;
1543 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1544 spin_unlock(&serial->serial_lock);
1545 tiocmget->intr_completed = 1;
1546 wake_up_interruptible(&tiocmget->waitq);
1547 }
1548 memset(serial_state_notification, 0,
1549 sizeof(struct hso_serial_state_notification));
1550 tiocmget_submit_urb(serial,
1551 tiocmget,
1552 serial->parent->usb);
1553 }
1554
1555 /*
1556 * next few functions largely stolen from drivers/serial/serial_core.c
1557 */
1558 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1559 * - mask passed in arg for lines of interest
1560 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1561 * Caller should use TIOCGICOUNT to see which one it was
1562 */
1563 static int
1564 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1565 {
1566 DECLARE_WAITQUEUE(wait, current);
1567 struct uart_icount cprev, cnow;
1568 struct hso_tiocmget *tiocmget;
1569 int ret;
1570
1571 tiocmget = serial->tiocmget;
1572 if (!tiocmget)
1573 return -ENOENT;
1574 /*
1575 * note the counters on entry
1576 */
1577 spin_lock_irq(&serial->serial_lock);
1578 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1579 spin_unlock_irq(&serial->serial_lock);
1580 add_wait_queue(&tiocmget->waitq, &wait);
1581 for (;;) {
1582 spin_lock_irq(&serial->serial_lock);
1583 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1584 spin_unlock_irq(&serial->serial_lock);
1585 set_current_state(TASK_INTERRUPTIBLE);
1586 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1587 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1588 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1589 ret = 0;
1590 break;
1591 }
1592 schedule();
1593 /* see if a signal did it */
1594 if (signal_pending(current)) {
1595 ret = -ERESTARTSYS;
1596 break;
1597 }
1598 cprev = cnow;
1599 }
1600 __set_current_state(TASK_RUNNING);
1601 remove_wait_queue(&tiocmget->waitq, &wait);
1602
1603 return ret;
1604 }
1605
1606 /*
1607 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1608 * Return: write counters to the user passed counter struct
1609 * NB: both 1->0 and 0->1 transitions are counted except for
1610 * RI where only 0->1 is counted.
1611 */
1612 static int hso_get_count(struct tty_struct *tty,
1613 struct serial_icounter_struct *icount)
1614 {
1615 struct uart_icount cnow;
1616 struct hso_serial *serial = tty->driver_data;
1617 struct hso_tiocmget *tiocmget = serial->tiocmget;
1618
1619 memset(icount, 0, sizeof(struct serial_icounter_struct));
1620
1621 if (!tiocmget)
1622 return -ENOENT;
1623 spin_lock_irq(&serial->serial_lock);
1624 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1625 spin_unlock_irq(&serial->serial_lock);
1626
1627 icount->cts = cnow.cts;
1628 icount->dsr = cnow.dsr;
1629 icount->rng = cnow.rng;
1630 icount->dcd = cnow.dcd;
1631 icount->rx = cnow.rx;
1632 icount->tx = cnow.tx;
1633 icount->frame = cnow.frame;
1634 icount->overrun = cnow.overrun;
1635 icount->parity = cnow.parity;
1636 icount->brk = cnow.brk;
1637 icount->buf_overrun = cnow.buf_overrun;
1638
1639 return 0;
1640 }
1641
1642
1643 static int hso_serial_tiocmget(struct tty_struct *tty)
1644 {
1645 int retval;
1646 struct hso_serial *serial = tty->driver_data;
1647 struct hso_tiocmget *tiocmget;
1648 u16 UART_state_bitmap;
1649
1650 /* sanity check */
1651 if (!serial) {
1652 D1("no tty structures");
1653 return -EINVAL;
1654 }
1655 spin_lock_irq(&serial->serial_lock);
1656 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1657 ((serial->dtr_state) ? TIOCM_DTR : 0);
1658 tiocmget = serial->tiocmget;
1659 if (tiocmget) {
1660
1661 UART_state_bitmap = le16_to_cpu(
1662 tiocmget->prev_UART_state_bitmap);
1663 if (UART_state_bitmap & B_RING_SIGNAL)
1664 retval |= TIOCM_RNG;
1665 if (UART_state_bitmap & B_RX_CARRIER)
1666 retval |= TIOCM_CD;
1667 if (UART_state_bitmap & B_TX_CARRIER)
1668 retval |= TIOCM_DSR;
1669 }
1670 spin_unlock_irq(&serial->serial_lock);
1671 return retval;
1672 }
1673
1674 static int hso_serial_tiocmset(struct tty_struct *tty,
1675 unsigned int set, unsigned int clear)
1676 {
1677 int val = 0;
1678 unsigned long flags;
1679 int if_num;
1680 struct hso_serial *serial = tty->driver_data;
1681 struct usb_interface *interface;
1682
1683 /* sanity check */
1684 if (!serial) {
1685 D1("no tty structures");
1686 return -EINVAL;
1687 }
1688
1689 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1690 return -EINVAL;
1691
1692 interface = serial->parent->interface;
1693 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1694
1695 spin_lock_irqsave(&serial->serial_lock, flags);
1696 if (set & TIOCM_RTS)
1697 serial->rts_state = 1;
1698 if (set & TIOCM_DTR)
1699 serial->dtr_state = 1;
1700
1701 if (clear & TIOCM_RTS)
1702 serial->rts_state = 0;
1703 if (clear & TIOCM_DTR)
1704 serial->dtr_state = 0;
1705
1706 if (serial->dtr_state)
1707 val |= 0x01;
1708 if (serial->rts_state)
1709 val |= 0x02;
1710
1711 spin_unlock_irqrestore(&serial->serial_lock, flags);
1712
1713 return usb_control_msg(serial->parent->usb,
1714 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1715 0x21, val, if_num, NULL, 0,
1716 USB_CTRL_SET_TIMEOUT);
1717 }
1718
1719 static int hso_serial_ioctl(struct tty_struct *tty,
1720 unsigned int cmd, unsigned long arg)
1721 {
1722 struct hso_serial *serial = tty->driver_data;
1723 int ret = 0;
1724 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1725
1726 if (!serial)
1727 return -ENODEV;
1728 switch (cmd) {
1729 case TIOCMIWAIT:
1730 ret = hso_wait_modem_status(serial, arg);
1731 break;
1732 default:
1733 ret = -ENOIOCTLCMD;
1734 break;
1735 }
1736 return ret;
1737 }
1738
1739
1740 /* starts a transmit */
1741 static void hso_kick_transmit(struct hso_serial *serial)
1742 {
1743 u8 *temp;
1744 unsigned long flags;
1745 int res;
1746
1747 spin_lock_irqsave(&serial->serial_lock, flags);
1748 if (!serial->tx_buffer_count)
1749 goto out;
1750
1751 if (serial->tx_urb_used)
1752 goto out;
1753
1754 /* Wakeup USB interface if necessary */
1755 if (hso_get_activity(serial->parent) == -EAGAIN)
1756 goto out;
1757
1758 /* Switch pointers around to avoid memcpy */
1759 temp = serial->tx_buffer;
1760 serial->tx_buffer = serial->tx_data;
1761 serial->tx_data = temp;
1762 serial->tx_data_count = serial->tx_buffer_count;
1763 serial->tx_buffer_count = 0;
1764
1765 /* If temp is set, it means we switched buffers */
1766 if (temp && serial->write_data) {
1767 res = serial->write_data(serial);
1768 if (res >= 0)
1769 serial->tx_urb_used = 1;
1770 }
1771 out:
1772 spin_unlock_irqrestore(&serial->serial_lock, flags);
1773 }
1774
1775 /* make a request (for reading and writing data to muxed serial port) */
1776 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1777 struct urb *ctrl_urb,
1778 struct usb_ctrlrequest *ctrl_req,
1779 u8 *ctrl_urb_data, u32 size)
1780 {
1781 int result;
1782 int pipe;
1783
1784 /* Sanity check */
1785 if (!serial || !ctrl_urb || !ctrl_req) {
1786 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1787 return -EINVAL;
1788 }
1789
1790 /* initialize */
1791 ctrl_req->wValue = 0;
1792 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1793 ctrl_req->wLength = cpu_to_le16(size);
1794
1795 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1796 /* Reading command */
1797 ctrl_req->bRequestType = USB_DIR_IN |
1798 USB_TYPE_OPTION_VENDOR |
1799 USB_RECIP_INTERFACE;
1800 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1801 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1802 } else {
1803 /* Writing command */
1804 ctrl_req->bRequestType = USB_DIR_OUT |
1805 USB_TYPE_OPTION_VENDOR |
1806 USB_RECIP_INTERFACE;
1807 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1808 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1809 }
1810 /* syslog */
1811 D2("%s command (%02x) len: %d, port: %d",
1812 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1813 ctrl_req->bRequestType, ctrl_req->wLength, port);
1814
1815 /* Load ctrl urb */
1816 ctrl_urb->transfer_flags = 0;
1817 usb_fill_control_urb(ctrl_urb,
1818 serial->parent->usb,
1819 pipe,
1820 (u8 *) ctrl_req,
1821 ctrl_urb_data, size, ctrl_callback, serial);
1822 /* Send it on merry way */
1823 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1824 if (result) {
1825 dev_err(&ctrl_urb->dev->dev,
1826 "%s failed submit ctrl_urb %d type %d\n", __func__,
1827 result, type);
1828 return result;
1829 }
1830
1831 /* done */
1832 return size;
1833 }
1834
1835 /* called by intr_callback when read occurs */
1836 static int hso_mux_serial_read(struct hso_serial *serial)
1837 {
1838 if (!serial)
1839 return -EINVAL;
1840
1841 /* clean data */
1842 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1843 /* make the request */
1844
1845 if (serial->num_rx_urbs != 1) {
1846 dev_err(&serial->parent->interface->dev,
1847 "ERROR: mux'd reads with multiple buffers "
1848 "not possible\n");
1849 return 0;
1850 }
1851 return mux_device_request(serial,
1852 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1853 serial->parent->port_spec & HSO_PORT_MASK,
1854 serial->rx_urb[0],
1855 &serial->ctrl_req_rx,
1856 serial->rx_data[0], serial->rx_data_length);
1857 }
1858
1859 /* used for muxed serial port callback (muxed serial read) */
1860 static void intr_callback(struct urb *urb)
1861 {
1862 struct hso_shared_int *shared_int = urb->context;
1863 struct hso_serial *serial;
1864 unsigned char *port_req;
1865 int status = urb->status;
1866 int i;
1867
1868 usb_mark_last_busy(urb->dev);
1869
1870 /* sanity check */
1871 if (!shared_int)
1872 return;
1873
1874 /* status check */
1875 if (status) {
1876 handle_usb_error(status, __func__, NULL);
1877 return;
1878 }
1879 D4("\n--- Got intr callback 0x%02X ---", status);
1880
1881 /* what request? */
1882 port_req = urb->transfer_buffer;
1883 D4(" port_req = 0x%.2X\n", *port_req);
1884 /* loop over all muxed ports to find the one sending this */
1885 for (i = 0; i < 8; i++) {
1886 /* max 8 channels on MUX */
1887 if (*port_req & (1 << i)) {
1888 serial = get_serial_by_shared_int_and_type(shared_int,
1889 (1 << i));
1890 if (serial != NULL) {
1891 D1("Pending read interrupt on port %d\n", i);
1892 spin_lock(&serial->serial_lock);
1893 if (serial->rx_state == RX_IDLE &&
1894 serial->port.count > 0) {
1895 /* Setup and send a ctrl req read on
1896 * port i */
1897 if (!serial->rx_urb_filled[0]) {
1898 serial->rx_state = RX_SENT;
1899 hso_mux_serial_read(serial);
1900 } else
1901 serial->rx_state = RX_PENDING;
1902 } else {
1903 D1("Already a read pending on "
1904 "port %d or port not open\n", i);
1905 }
1906 spin_unlock(&serial->serial_lock);
1907 }
1908 }
1909 }
1910 /* Resubmit interrupt urb */
1911 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1912 }
1913
1914 /* called for writing to muxed serial port */
1915 static int hso_mux_serial_write_data(struct hso_serial *serial)
1916 {
1917 if (NULL == serial)
1918 return -EINVAL;
1919
1920 return mux_device_request(serial,
1921 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1922 serial->parent->port_spec & HSO_PORT_MASK,
1923 serial->tx_urb,
1924 &serial->ctrl_req_tx,
1925 serial->tx_data, serial->tx_data_count);
1926 }
1927
1928 /* write callback for Diag and CS port */
1929 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1930 {
1931 struct hso_serial *serial = urb->context;
1932 int status = urb->status;
1933
1934 /* sanity check */
1935 if (!serial) {
1936 D1("serial == NULL");
1937 return;
1938 }
1939
1940 spin_lock(&serial->serial_lock);
1941 serial->tx_urb_used = 0;
1942 spin_unlock(&serial->serial_lock);
1943 if (status) {
1944 handle_usb_error(status, __func__, serial->parent);
1945 return;
1946 }
1947 hso_put_activity(serial->parent);
1948 tty_port_tty_wakeup(&serial->port);
1949 hso_kick_transmit(serial);
1950
1951 D1(" ");
1952 }
1953
1954 /* called for writing diag or CS serial port */
1955 static int hso_std_serial_write_data(struct hso_serial *serial)
1956 {
1957 int count = serial->tx_data_count;
1958 int result;
1959
1960 usb_fill_bulk_urb(serial->tx_urb,
1961 serial->parent->usb,
1962 usb_sndbulkpipe(serial->parent->usb,
1963 serial->out_endp->
1964 bEndpointAddress & 0x7F),
1965 serial->tx_data, serial->tx_data_count,
1966 hso_std_serial_write_bulk_callback, serial);
1967
1968 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969 if (result) {
1970 dev_warn(&serial->parent->usb->dev,
1971 "Failed to submit urb - res %d\n", result);
1972 return result;
1973 }
1974
1975 return count;
1976 }
1977
1978 /* callback after read or write on muxed serial port */
1979 static void ctrl_callback(struct urb *urb)
1980 {
1981 struct hso_serial *serial = urb->context;
1982 struct usb_ctrlrequest *req;
1983 int status = urb->status;
1984
1985 /* sanity check */
1986 if (!serial)
1987 return;
1988
1989 spin_lock(&serial->serial_lock);
1990 serial->tx_urb_used = 0;
1991 spin_unlock(&serial->serial_lock);
1992 if (status) {
1993 handle_usb_error(status, __func__, serial->parent);
1994 return;
1995 }
1996
1997 /* what request? */
1998 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000 D4("Actual length of urb = %d\n", urb->actual_length);
2001 DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003 if (req->bRequestType ==
2004 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005 /* response to a read command */
2006 serial->rx_urb_filled[0] = 1;
2007 spin_lock(&serial->serial_lock);
2008 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009 spin_unlock(&serial->serial_lock);
2010 } else {
2011 hso_put_activity(serial->parent);
2012 tty_port_tty_wakeup(&serial->port);
2013 /* response to a write command */
2014 hso_kick_transmit(serial);
2015 }
2016 }
2017
2018 /* handle RX data for serial port */
2019 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2020 {
2021 struct tty_struct *tty;
2022 int count;
2023
2024 /* Sanity check */
2025 if (urb == NULL || serial == NULL) {
2026 D1("serial = NULL");
2027 return -2;
2028 }
2029
2030 tty = tty_port_tty_get(&serial->port);
2031
2032 if (tty && tty_throttled(tty)) {
2033 tty_kref_put(tty);
2034 return -1;
2035 }
2036
2037 /* Push data to tty */
2038 D1("data to push to tty");
2039 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2040 if (count >= urb->actual_length) {
2041 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2042 urb->actual_length);
2043 tty_flip_buffer_push(&serial->port);
2044 } else {
2045 dev_warn(&serial->parent->usb->dev,
2046 "dropping data, %d bytes lost\n", urb->actual_length);
2047 }
2048
2049 tty_kref_put(tty);
2050
2051 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2052
2053 return 0;
2054 }
2055
2056
2057 /* Base driver functions */
2058
2059 static void hso_log_port(struct hso_device *hso_dev)
2060 {
2061 char *port_type;
2062 char port_dev[20];
2063
2064 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2065 case HSO_PORT_CONTROL:
2066 port_type = "Control";
2067 break;
2068 case HSO_PORT_APP:
2069 port_type = "Application";
2070 break;
2071 case HSO_PORT_GPS:
2072 port_type = "GPS";
2073 break;
2074 case HSO_PORT_GPS_CONTROL:
2075 port_type = "GPS control";
2076 break;
2077 case HSO_PORT_APP2:
2078 port_type = "Application2";
2079 break;
2080 case HSO_PORT_PCSC:
2081 port_type = "PCSC";
2082 break;
2083 case HSO_PORT_DIAG:
2084 port_type = "Diagnostic";
2085 break;
2086 case HSO_PORT_DIAG2:
2087 port_type = "Diagnostic2";
2088 break;
2089 case HSO_PORT_MODEM:
2090 port_type = "Modem";
2091 break;
2092 case HSO_PORT_NETWORK:
2093 port_type = "Network";
2094 break;
2095 default:
2096 port_type = "Unknown";
2097 break;
2098 }
2099 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2100 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2101 } else
2102 sprintf(port_dev, "/dev/%s%d", tty_filename,
2103 dev2ser(hso_dev)->minor);
2104
2105 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2106 port_type, port_dev);
2107 }
2108
2109 static int hso_start_net_device(struct hso_device *hso_dev)
2110 {
2111 int i, result = 0;
2112 struct hso_net *hso_net = dev2net(hso_dev);
2113
2114 if (!hso_net)
2115 return -ENODEV;
2116
2117 /* send URBs for all read buffers */
2118 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2119
2120 /* Prep a receive URB */
2121 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2122 hso_dev->usb,
2123 usb_rcvbulkpipe(hso_dev->usb,
2124 hso_net->in_endp->
2125 bEndpointAddress & 0x7F),
2126 hso_net->mux_bulk_rx_buf_pool[i],
2127 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2128 hso_net);
2129
2130 /* Put it out there so the device can send us stuff */
2131 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2132 GFP_NOIO);
2133 if (result)
2134 dev_warn(&hso_dev->usb->dev,
2135 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2136 i, result);
2137 }
2138
2139 return result;
2140 }
2141
2142 static int hso_stop_net_device(struct hso_device *hso_dev)
2143 {
2144 int i;
2145 struct hso_net *hso_net = dev2net(hso_dev);
2146
2147 if (!hso_net)
2148 return -ENODEV;
2149
2150 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2151 if (hso_net->mux_bulk_rx_urb_pool[i])
2152 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2153
2154 }
2155 if (hso_net->mux_bulk_tx_urb)
2156 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2157
2158 return 0;
2159 }
2160
2161 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2162 {
2163 int i, result = 0;
2164 struct hso_serial *serial = dev2ser(hso_dev);
2165
2166 if (!serial)
2167 return -ENODEV;
2168
2169 /* If it is not the MUX port fill in and submit a bulk urb (already
2170 * allocated in hso_serial_start) */
2171 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2172 for (i = 0; i < serial->num_rx_urbs; i++) {
2173 usb_fill_bulk_urb(serial->rx_urb[i],
2174 serial->parent->usb,
2175 usb_rcvbulkpipe(serial->parent->usb,
2176 serial->in_endp->
2177 bEndpointAddress &
2178 0x7F),
2179 serial->rx_data[i],
2180 serial->rx_data_length,
2181 hso_std_serial_read_bulk_callback,
2182 serial);
2183 result = usb_submit_urb(serial->rx_urb[i], flags);
2184 if (result) {
2185 dev_warn(&serial->parent->usb->dev,
2186 "Failed to submit urb - res %d\n",
2187 result);
2188 break;
2189 }
2190 }
2191 } else {
2192 mutex_lock(&serial->shared_int->shared_int_lock);
2193 if (!serial->shared_int->use_count) {
2194 result =
2195 hso_mux_submit_intr_urb(serial->shared_int,
2196 hso_dev->usb, flags);
2197 }
2198 serial->shared_int->use_count++;
2199 mutex_unlock(&serial->shared_int->shared_int_lock);
2200 }
2201 if (serial->tiocmget)
2202 tiocmget_submit_urb(serial,
2203 serial->tiocmget,
2204 serial->parent->usb);
2205 return result;
2206 }
2207
2208 static int hso_stop_serial_device(struct hso_device *hso_dev)
2209 {
2210 int i;
2211 struct hso_serial *serial = dev2ser(hso_dev);
2212 struct hso_tiocmget *tiocmget;
2213
2214 if (!serial)
2215 return -ENODEV;
2216
2217 for (i = 0; i < serial->num_rx_urbs; i++) {
2218 if (serial->rx_urb[i]) {
2219 usb_kill_urb(serial->rx_urb[i]);
2220 serial->rx_urb_filled[i] = 0;
2221 }
2222 }
2223 serial->curr_rx_urb_idx = 0;
2224
2225 if (serial->tx_urb)
2226 usb_kill_urb(serial->tx_urb);
2227
2228 if (serial->shared_int) {
2229 mutex_lock(&serial->shared_int->shared_int_lock);
2230 if (serial->shared_int->use_count &&
2231 (--serial->shared_int->use_count == 0)) {
2232 struct urb *urb;
2233
2234 urb = serial->shared_int->shared_intr_urb;
2235 if (urb)
2236 usb_kill_urb(urb);
2237 }
2238 mutex_unlock(&serial->shared_int->shared_int_lock);
2239 }
2240 tiocmget = serial->tiocmget;
2241 if (tiocmget) {
2242 wake_up_interruptible(&tiocmget->waitq);
2243 usb_kill_urb(tiocmget->urb);
2244 }
2245
2246 return 0;
2247 }
2248
2249 static void hso_serial_tty_unregister(struct hso_serial *serial)
2250 {
2251 tty_unregister_device(tty_drv, serial->minor);
2252 }
2253
2254 static void hso_serial_common_free(struct hso_serial *serial)
2255 {
2256 int i;
2257
2258 for (i = 0; i < serial->num_rx_urbs; i++) {
2259 /* unlink and free RX URB */
2260 usb_free_urb(serial->rx_urb[i]);
2261 /* free the RX buffer */
2262 kfree(serial->rx_data[i]);
2263 }
2264
2265 /* unlink and free TX URB */
2266 usb_free_urb(serial->tx_urb);
2267 kfree(serial->tx_buffer);
2268 kfree(serial->tx_data);
2269 tty_port_destroy(&serial->port);
2270 }
2271
2272 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2273 int rx_size, int tx_size)
2274 {
2275 struct device *dev;
2276 int minor;
2277 int i;
2278
2279 tty_port_init(&serial->port);
2280
2281 minor = get_free_serial_index();
2282 if (minor < 0)
2283 goto exit;
2284
2285 /* register our minor number */
2286 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2287 tty_drv, minor, &serial->parent->interface->dev,
2288 serial->parent, hso_serial_dev_groups);
2289 dev = serial->parent->dev;
2290
2291 /* fill in specific data for later use */
2292 serial->minor = minor;
2293 serial->magic = HSO_SERIAL_MAGIC;
2294 spin_lock_init(&serial->serial_lock);
2295 serial->num_rx_urbs = num_urbs;
2296
2297 /* RX, allocate urb and initialize */
2298
2299 /* prepare our RX buffer */
2300 serial->rx_data_length = rx_size;
2301 for (i = 0; i < serial->num_rx_urbs; i++) {
2302 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2303 if (!serial->rx_urb[i]) {
2304 dev_err(dev, "Could not allocate urb?\n");
2305 goto exit;
2306 }
2307 serial->rx_urb[i]->transfer_buffer = NULL;
2308 serial->rx_urb[i]->transfer_buffer_length = 0;
2309 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2310 GFP_KERNEL);
2311 if (!serial->rx_data[i])
2312 goto exit;
2313 }
2314
2315 /* TX, allocate urb and initialize */
2316 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2317 if (!serial->tx_urb) {
2318 dev_err(dev, "Could not allocate urb?\n");
2319 goto exit;
2320 }
2321 serial->tx_urb->transfer_buffer = NULL;
2322 serial->tx_urb->transfer_buffer_length = 0;
2323 /* prepare our TX buffer */
2324 serial->tx_data_count = 0;
2325 serial->tx_buffer_count = 0;
2326 serial->tx_data_length = tx_size;
2327 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2328 if (!serial->tx_data)
2329 goto exit;
2330
2331 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2332 if (!serial->tx_buffer)
2333 goto exit;
2334
2335 return 0;
2336 exit:
2337 hso_serial_tty_unregister(serial);
2338 hso_serial_common_free(serial);
2339 return -1;
2340 }
2341
2342 /* Creates a general hso device */
2343 static struct hso_device *hso_create_device(struct usb_interface *intf,
2344 int port_spec)
2345 {
2346 struct hso_device *hso_dev;
2347
2348 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2349 if (!hso_dev)
2350 return NULL;
2351
2352 hso_dev->port_spec = port_spec;
2353 hso_dev->usb = interface_to_usbdev(intf);
2354 hso_dev->interface = intf;
2355 kref_init(&hso_dev->ref);
2356 mutex_init(&hso_dev->mutex);
2357
2358 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2359 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2360
2361 return hso_dev;
2362 }
2363
2364 /* Removes a network device in the network device table */
2365 static int remove_net_device(struct hso_device *hso_dev)
2366 {
2367 int i;
2368
2369 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2370 if (network_table[i] == hso_dev) {
2371 network_table[i] = NULL;
2372 break;
2373 }
2374 }
2375 if (i == HSO_MAX_NET_DEVICES)
2376 return -1;
2377 return 0;
2378 }
2379
2380 /* Frees our network device */
2381 static void hso_free_net_device(struct hso_device *hso_dev)
2382 {
2383 int i;
2384 struct hso_net *hso_net = dev2net(hso_dev);
2385
2386 if (!hso_net)
2387 return;
2388
2389 remove_net_device(hso_net->parent);
2390
2391 if (hso_net->net)
2392 unregister_netdev(hso_net->net);
2393
2394 /* start freeing */
2395 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2396 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2397 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2398 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2399 }
2400 usb_free_urb(hso_net->mux_bulk_tx_urb);
2401 kfree(hso_net->mux_bulk_tx_buf);
2402 hso_net->mux_bulk_tx_buf = NULL;
2403
2404 if (hso_net->net)
2405 free_netdev(hso_net->net);
2406
2407 kfree(hso_dev);
2408 }
2409
2410 static const struct net_device_ops hso_netdev_ops = {
2411 .ndo_open = hso_net_open,
2412 .ndo_stop = hso_net_close,
2413 .ndo_start_xmit = hso_net_start_xmit,
2414 .ndo_tx_timeout = hso_net_tx_timeout,
2415 };
2416
2417 /* initialize the network interface */
2418 static void hso_net_init(struct net_device *net)
2419 {
2420 struct hso_net *hso_net = netdev_priv(net);
2421
2422 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2423
2424 /* fill in the other fields */
2425 net->netdev_ops = &hso_netdev_ops;
2426 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2427 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2428 net->type = ARPHRD_NONE;
2429 net->mtu = DEFAULT_MTU - 14;
2430 net->tx_queue_len = 10;
2431 net->ethtool_ops = &ops;
2432
2433 /* and initialize the semaphore */
2434 spin_lock_init(&hso_net->net_lock);
2435 }
2436
2437 /* Adds a network device in the network device table */
2438 static int add_net_device(struct hso_device *hso_dev)
2439 {
2440 int i;
2441
2442 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2443 if (network_table[i] == NULL) {
2444 network_table[i] = hso_dev;
2445 break;
2446 }
2447 }
2448 if (i == HSO_MAX_NET_DEVICES)
2449 return -1;
2450 return 0;
2451 }
2452
2453 static int hso_rfkill_set_block(void *data, bool blocked)
2454 {
2455 struct hso_device *hso_dev = data;
2456 int enabled = !blocked;
2457 int rv;
2458
2459 mutex_lock(&hso_dev->mutex);
2460 if (hso_dev->usb_gone)
2461 rv = 0;
2462 else
2463 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2464 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2465 USB_CTRL_SET_TIMEOUT);
2466 mutex_unlock(&hso_dev->mutex);
2467 return rv;
2468 }
2469
2470 static const struct rfkill_ops hso_rfkill_ops = {
2471 .set_block = hso_rfkill_set_block,
2472 };
2473
2474 /* Creates and sets up everything for rfkill */
2475 static void hso_create_rfkill(struct hso_device *hso_dev,
2476 struct usb_interface *interface)
2477 {
2478 struct hso_net *hso_net = dev2net(hso_dev);
2479 struct device *dev = &hso_net->net->dev;
2480 static u32 rfkill_counter;
2481
2482 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2483 rfkill_counter++);
2484
2485 hso_net->rfkill = rfkill_alloc(hso_net->name,
2486 &interface_to_usbdev(interface)->dev,
2487 RFKILL_TYPE_WWAN,
2488 &hso_rfkill_ops, hso_dev);
2489 if (!hso_net->rfkill) {
2490 dev_err(dev, "%s - Out of memory\n", __func__);
2491 return;
2492 }
2493 if (rfkill_register(hso_net->rfkill) < 0) {
2494 rfkill_destroy(hso_net->rfkill);
2495 hso_net->rfkill = NULL;
2496 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2497 return;
2498 }
2499 }
2500
2501 static struct device_type hso_type = {
2502 .name = "wwan",
2503 };
2504
2505 /* Creates our network device */
2506 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2507 int port_spec)
2508 {
2509 int result, i;
2510 struct net_device *net;
2511 struct hso_net *hso_net;
2512 struct hso_device *hso_dev;
2513
2514 hso_dev = hso_create_device(interface, port_spec);
2515 if (!hso_dev)
2516 return NULL;
2517
2518 /* allocate our network device, then we can put in our private data */
2519 /* call hso_net_init to do the basic initialization */
2520 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2521 hso_net_init);
2522 if (!net) {
2523 dev_err(&interface->dev, "Unable to create ethernet device\n");
2524 goto exit;
2525 }
2526
2527 hso_net = netdev_priv(net);
2528
2529 hso_dev->port_data.dev_net = hso_net;
2530 hso_net->net = net;
2531 hso_net->parent = hso_dev;
2532
2533 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2534 USB_DIR_IN);
2535 if (!hso_net->in_endp) {
2536 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2537 goto exit;
2538 }
2539 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2540 USB_DIR_OUT);
2541 if (!hso_net->out_endp) {
2542 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2543 goto exit;
2544 }
2545 SET_NETDEV_DEV(net, &interface->dev);
2546 SET_NETDEV_DEVTYPE(net, &hso_type);
2547
2548 /* registering our net device */
2549 result = register_netdev(net);
2550 if (result) {
2551 dev_err(&interface->dev, "Failed to register device\n");
2552 goto exit;
2553 }
2554
2555 /* start allocating */
2556 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2557 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2558 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2559 dev_err(&interface->dev, "Could not allocate rx urb\n");
2560 goto exit;
2561 }
2562 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2563 GFP_KERNEL);
2564 if (!hso_net->mux_bulk_rx_buf_pool[i])
2565 goto exit;
2566 }
2567 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2568 if (!hso_net->mux_bulk_tx_urb) {
2569 dev_err(&interface->dev, "Could not allocate tx urb\n");
2570 goto exit;
2571 }
2572 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2573 if (!hso_net->mux_bulk_tx_buf)
2574 goto exit;
2575
2576 add_net_device(hso_dev);
2577
2578 hso_log_port(hso_dev);
2579
2580 hso_create_rfkill(hso_dev, interface);
2581
2582 return hso_dev;
2583 exit:
2584 hso_free_net_device(hso_dev);
2585 return NULL;
2586 }
2587
2588 static void hso_free_tiomget(struct hso_serial *serial)
2589 {
2590 struct hso_tiocmget *tiocmget;
2591 if (!serial)
2592 return;
2593 tiocmget = serial->tiocmget;
2594 if (tiocmget) {
2595 usb_free_urb(tiocmget->urb);
2596 tiocmget->urb = NULL;
2597 serial->tiocmget = NULL;
2598 kfree(tiocmget);
2599 }
2600 }
2601
2602 /* Frees an AT channel ( goes for both mux and non-mux ) */
2603 static void hso_free_serial_device(struct hso_device *hso_dev)
2604 {
2605 struct hso_serial *serial = dev2ser(hso_dev);
2606
2607 if (!serial)
2608 return;
2609
2610 hso_serial_common_free(serial);
2611
2612 if (serial->shared_int) {
2613 mutex_lock(&serial->shared_int->shared_int_lock);
2614 if (--serial->shared_int->ref_count == 0)
2615 hso_free_shared_int(serial->shared_int);
2616 else
2617 mutex_unlock(&serial->shared_int->shared_int_lock);
2618 }
2619 hso_free_tiomget(serial);
2620 kfree(serial);
2621 kfree(hso_dev);
2622 }
2623
2624 /* Creates a bulk AT channel */
2625 static struct hso_device *hso_create_bulk_serial_device(
2626 struct usb_interface *interface, int port)
2627 {
2628 struct hso_device *hso_dev;
2629 struct hso_serial *serial;
2630 int num_urbs;
2631 struct hso_tiocmget *tiocmget;
2632
2633 hso_dev = hso_create_device(interface, port);
2634 if (!hso_dev)
2635 return NULL;
2636
2637 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2638 if (!serial)
2639 goto exit;
2640
2641 serial->parent = hso_dev;
2642 hso_dev->port_data.dev_serial = serial;
2643
2644 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2645 num_urbs = 2;
2646 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2647 GFP_KERNEL);
2648 /* it isn't going to break our heart if serial->tiocmget
2649 * allocation fails don't bother checking this.
2650 */
2651 if (serial->tiocmget) {
2652 tiocmget = serial->tiocmget;
2653 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2654 if (tiocmget->urb) {
2655 mutex_init(&tiocmget->mutex);
2656 init_waitqueue_head(&tiocmget->waitq);
2657 tiocmget->endp = hso_get_ep(
2658 interface,
2659 USB_ENDPOINT_XFER_INT,
2660 USB_DIR_IN);
2661 } else
2662 hso_free_tiomget(serial);
2663 }
2664 }
2665 else
2666 num_urbs = 1;
2667
2668 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2669 BULK_URB_TX_SIZE))
2670 goto exit;
2671
2672 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2673 USB_DIR_IN);
2674 if (!serial->in_endp) {
2675 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2676 goto exit2;
2677 }
2678
2679 if (!
2680 (serial->out_endp =
2681 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2682 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2683 goto exit2;
2684 }
2685
2686 serial->write_data = hso_std_serial_write_data;
2687
2688 /* and record this serial */
2689 set_serial_by_index(serial->minor, serial);
2690
2691 /* setup the proc dirs and files if needed */
2692 hso_log_port(hso_dev);
2693
2694 /* done, return it */
2695 return hso_dev;
2696
2697 exit2:
2698 hso_serial_tty_unregister(serial);
2699 hso_serial_common_free(serial);
2700 exit:
2701 hso_free_tiomget(serial);
2702 kfree(serial);
2703 kfree(hso_dev);
2704 return NULL;
2705 }
2706
2707 /* Creates a multiplexed AT channel */
2708 static
2709 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2710 int port,
2711 struct hso_shared_int *mux)
2712 {
2713 struct hso_device *hso_dev;
2714 struct hso_serial *serial;
2715 int port_spec;
2716
2717 port_spec = HSO_INTF_MUX;
2718 port_spec &= ~HSO_PORT_MASK;
2719
2720 port_spec |= hso_mux_to_port(port);
2721 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2722 return NULL;
2723
2724 hso_dev = hso_create_device(interface, port_spec);
2725 if (!hso_dev)
2726 return NULL;
2727
2728 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2729 if (!serial)
2730 goto exit;
2731
2732 hso_dev->port_data.dev_serial = serial;
2733 serial->parent = hso_dev;
2734
2735 if (hso_serial_common_create
2736 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2737 goto exit;
2738
2739 serial->tx_data_length--;
2740 serial->write_data = hso_mux_serial_write_data;
2741
2742 serial->shared_int = mux;
2743 mutex_lock(&serial->shared_int->shared_int_lock);
2744 serial->shared_int->ref_count++;
2745 mutex_unlock(&serial->shared_int->shared_int_lock);
2746
2747 /* and record this serial */
2748 set_serial_by_index(serial->minor, serial);
2749
2750 /* setup the proc dirs and files if needed */
2751 hso_log_port(hso_dev);
2752
2753 /* done, return it */
2754 return hso_dev;
2755
2756 exit:
2757 if (serial) {
2758 tty_unregister_device(tty_drv, serial->minor);
2759 kfree(serial);
2760 }
2761 kfree(hso_dev);
2762 return NULL;
2763
2764 }
2765
2766 static void hso_free_shared_int(struct hso_shared_int *mux)
2767 {
2768 usb_free_urb(mux->shared_intr_urb);
2769 kfree(mux->shared_intr_buf);
2770 mutex_unlock(&mux->shared_int_lock);
2771 kfree(mux);
2772 }
2773
2774 static
2775 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2776 {
2777 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2778
2779 if (!mux)
2780 return NULL;
2781
2782 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2783 USB_DIR_IN);
2784 if (!mux->intr_endp) {
2785 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2786 goto exit;
2787 }
2788
2789 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2790 if (!mux->shared_intr_urb) {
2791 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2792 goto exit;
2793 }
2794 mux->shared_intr_buf =
2795 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2796 GFP_KERNEL);
2797 if (!mux->shared_intr_buf)
2798 goto exit;
2799
2800 mutex_init(&mux->shared_int_lock);
2801
2802 return mux;
2803
2804 exit:
2805 kfree(mux->shared_intr_buf);
2806 usb_free_urb(mux->shared_intr_urb);
2807 kfree(mux);
2808 return NULL;
2809 }
2810
2811 /* Gets the port spec for a certain interface */
2812 static int hso_get_config_data(struct usb_interface *interface)
2813 {
2814 struct usb_device *usbdev = interface_to_usbdev(interface);
2815 u8 *config_data = kmalloc(17, GFP_KERNEL);
2816 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2817 s32 result;
2818
2819 if (!config_data)
2820 return -ENOMEM;
2821 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2822 0x86, 0xC0, 0, 0, config_data, 17,
2823 USB_CTRL_SET_TIMEOUT) != 0x11) {
2824 kfree(config_data);
2825 return -EIO;
2826 }
2827
2828 switch (config_data[if_num]) {
2829 case 0x0:
2830 result = 0;
2831 break;
2832 case 0x1:
2833 result = HSO_PORT_DIAG;
2834 break;
2835 case 0x2:
2836 result = HSO_PORT_GPS;
2837 break;
2838 case 0x3:
2839 result = HSO_PORT_GPS_CONTROL;
2840 break;
2841 case 0x4:
2842 result = HSO_PORT_APP;
2843 break;
2844 case 0x5:
2845 result = HSO_PORT_APP2;
2846 break;
2847 case 0x6:
2848 result = HSO_PORT_CONTROL;
2849 break;
2850 case 0x7:
2851 result = HSO_PORT_NETWORK;
2852 break;
2853 case 0x8:
2854 result = HSO_PORT_MODEM;
2855 break;
2856 case 0x9:
2857 result = HSO_PORT_MSD;
2858 break;
2859 case 0xa:
2860 result = HSO_PORT_PCSC;
2861 break;
2862 case 0xb:
2863 result = HSO_PORT_VOICE;
2864 break;
2865 default:
2866 result = 0;
2867 }
2868
2869 if (result)
2870 result |= HSO_INTF_BULK;
2871
2872 if (config_data[16] & 0x1)
2873 result |= HSO_INFO_CRC_BUG;
2874
2875 kfree(config_data);
2876 return result;
2877 }
2878
2879 /* called once for each interface upon device insertion */
2880 static int hso_probe(struct usb_interface *interface,
2881 const struct usb_device_id *id)
2882 {
2883 int mux, i, if_num, port_spec;
2884 unsigned char port_mask;
2885 struct hso_device *hso_dev = NULL;
2886 struct hso_shared_int *shared_int;
2887 struct hso_device *tmp_dev = NULL;
2888
2889 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2890 dev_err(&interface->dev, "Not our interface\n");
2891 return -ENODEV;
2892 }
2893
2894 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2895
2896 /* Get the interface/port specification from either driver_info or from
2897 * the device itself */
2898 if (id->driver_info)
2899 port_spec = ((u32 *)(id->driver_info))[if_num];
2900 else
2901 port_spec = hso_get_config_data(interface);
2902
2903 /* Check if we need to switch to alt interfaces prior to port
2904 * configuration */
2905 if (interface->num_altsetting > 1)
2906 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2907 interface->needs_remote_wakeup = 1;
2908
2909 /* Allocate new hso device(s) */
2910 switch (port_spec & HSO_INTF_MASK) {
2911 case HSO_INTF_MUX:
2912 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2913 /* Create the network device */
2914 if (!disable_net) {
2915 hso_dev = hso_create_net_device(interface,
2916 port_spec);
2917 if (!hso_dev)
2918 goto exit;
2919 tmp_dev = hso_dev;
2920 }
2921 }
2922
2923 if (hso_get_mux_ports(interface, &port_mask))
2924 /* TODO: de-allocate everything */
2925 goto exit;
2926
2927 shared_int = hso_create_shared_int(interface);
2928 if (!shared_int)
2929 goto exit;
2930
2931 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2932 if (port_mask & i) {
2933 hso_dev = hso_create_mux_serial_device(
2934 interface, i, shared_int);
2935 if (!hso_dev)
2936 goto exit;
2937 }
2938 }
2939
2940 if (tmp_dev)
2941 hso_dev = tmp_dev;
2942 break;
2943
2944 case HSO_INTF_BULK:
2945 /* It's a regular bulk interface */
2946 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2947 if (!disable_net)
2948 hso_dev =
2949 hso_create_net_device(interface, port_spec);
2950 } else {
2951 hso_dev =
2952 hso_create_bulk_serial_device(interface, port_spec);
2953 }
2954 if (!hso_dev)
2955 goto exit;
2956 break;
2957 default:
2958 goto exit;
2959 }
2960
2961 /* save our data pointer in this device */
2962 usb_set_intfdata(interface, hso_dev);
2963
2964 /* done */
2965 return 0;
2966 exit:
2967 hso_free_interface(interface);
2968 return -ENODEV;
2969 }
2970
2971 /* device removed, cleaning up */
2972 static void hso_disconnect(struct usb_interface *interface)
2973 {
2974 hso_free_interface(interface);
2975
2976 /* remove reference of our private data */
2977 usb_set_intfdata(interface, NULL);
2978 }
2979
2980 static void async_get_intf(struct work_struct *data)
2981 {
2982 struct hso_device *hso_dev =
2983 container_of(data, struct hso_device, async_get_intf);
2984 usb_autopm_get_interface(hso_dev->interface);
2985 }
2986
2987 static void async_put_intf(struct work_struct *data)
2988 {
2989 struct hso_device *hso_dev =
2990 container_of(data, struct hso_device, async_put_intf);
2991 usb_autopm_put_interface(hso_dev->interface);
2992 }
2993
2994 static int hso_get_activity(struct hso_device *hso_dev)
2995 {
2996 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2997 if (!hso_dev->is_active) {
2998 hso_dev->is_active = 1;
2999 schedule_work(&hso_dev->async_get_intf);
3000 }
3001 }
3002
3003 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3004 return -EAGAIN;
3005
3006 usb_mark_last_busy(hso_dev->usb);
3007
3008 return 0;
3009 }
3010
3011 static int hso_put_activity(struct hso_device *hso_dev)
3012 {
3013 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3014 if (hso_dev->is_active) {
3015 hso_dev->is_active = 0;
3016 schedule_work(&hso_dev->async_put_intf);
3017 return -EAGAIN;
3018 }
3019 }
3020 hso_dev->is_active = 0;
3021 return 0;
3022 }
3023
3024 /* called by kernel when we need to suspend device */
3025 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3026 {
3027 int i, result;
3028
3029 /* Stop all serial ports */
3030 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3031 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3032 result = hso_stop_serial_device(serial_table[i]);
3033 if (result)
3034 goto out;
3035 }
3036 }
3037
3038 /* Stop all network ports */
3039 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3040 if (network_table[i] &&
3041 (network_table[i]->interface == iface)) {
3042 result = hso_stop_net_device(network_table[i]);
3043 if (result)
3044 goto out;
3045 }
3046 }
3047
3048 out:
3049 return 0;
3050 }
3051
3052 /* called by kernel when we need to resume device */
3053 static int hso_resume(struct usb_interface *iface)
3054 {
3055 int i, result = 0;
3056 struct hso_net *hso_net;
3057
3058 /* Start all serial ports */
3059 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3060 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3061 if (dev2ser(serial_table[i])->port.count) {
3062 result =
3063 hso_start_serial_device(serial_table[i], GFP_NOIO);
3064 hso_kick_transmit(dev2ser(serial_table[i]));
3065 if (result)
3066 goto out;
3067 }
3068 }
3069 }
3070
3071 /* Start all network ports */
3072 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3073 if (network_table[i] &&
3074 (network_table[i]->interface == iface)) {
3075 hso_net = dev2net(network_table[i]);
3076 if (hso_net->flags & IFF_UP) {
3077 /* First transmit any lingering data,
3078 then restart the device. */
3079 if (hso_net->skb_tx_buf) {
3080 dev_dbg(&iface->dev,
3081 "Transmitting"
3082 " lingering data\n");
3083 hso_net_start_xmit(hso_net->skb_tx_buf,
3084 hso_net->net);
3085 hso_net->skb_tx_buf = NULL;
3086 }
3087 result = hso_start_net_device(network_table[i]);
3088 if (result)
3089 goto out;
3090 }
3091 }
3092 }
3093
3094 out:
3095 return result;
3096 }
3097
3098 static void hso_serial_ref_free(struct kref *ref)
3099 {
3100 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3101
3102 hso_free_serial_device(hso_dev);
3103 }
3104
3105 static void hso_free_interface(struct usb_interface *interface)
3106 {
3107 struct hso_serial *serial;
3108 int i;
3109
3110 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3111 if (serial_table[i] &&
3112 (serial_table[i]->interface == interface)) {
3113 serial = dev2ser(serial_table[i]);
3114 tty_port_tty_hangup(&serial->port, false);
3115 mutex_lock(&serial->parent->mutex);
3116 serial->parent->usb_gone = 1;
3117 mutex_unlock(&serial->parent->mutex);
3118 cancel_work_sync(&serial_table[i]->async_put_intf);
3119 cancel_work_sync(&serial_table[i]->async_get_intf);
3120 hso_serial_tty_unregister(serial);
3121 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3122 set_serial_by_index(i, NULL);
3123 }
3124 }
3125
3126 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3127 if (network_table[i] &&
3128 (network_table[i]->interface == interface)) {
3129 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3130 /* hso_stop_net_device doesn't stop the net queue since
3131 * traffic needs to start it again when suspended */
3132 netif_stop_queue(dev2net(network_table[i])->net);
3133 hso_stop_net_device(network_table[i]);
3134 cancel_work_sync(&network_table[i]->async_put_intf);
3135 cancel_work_sync(&network_table[i]->async_get_intf);
3136 if (rfk) {
3137 rfkill_unregister(rfk);
3138 rfkill_destroy(rfk);
3139 }
3140 hso_free_net_device(network_table[i]);
3141 }
3142 }
3143 }
3144
3145 /* Helper functions */
3146
3147 /* Get the endpoint ! */
3148 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3149 int type, int dir)
3150 {
3151 int i;
3152 struct usb_host_interface *iface = intf->cur_altsetting;
3153 struct usb_endpoint_descriptor *endp;
3154
3155 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3156 endp = &iface->endpoint[i].desc;
3157 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3158 (usb_endpoint_type(endp) == type))
3159 return endp;
3160 }
3161
3162 return NULL;
3163 }
3164
3165 /* Get the byte that describes which ports are enabled */
3166 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3167 {
3168 int i;
3169 struct usb_host_interface *iface = intf->cur_altsetting;
3170
3171 if (iface->extralen == 3) {
3172 *ports = iface->extra[2];
3173 return 0;
3174 }
3175
3176 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3177 if (iface->endpoint[i].extralen == 3) {
3178 *ports = iface->endpoint[i].extra[2];
3179 return 0;
3180 }
3181 }
3182
3183 return -1;
3184 }
3185
3186 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3187 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3188 struct usb_device *usb, gfp_t gfp)
3189 {
3190 int result;
3191
3192 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3193 usb_rcvintpipe(usb,
3194 shared_int->intr_endp->bEndpointAddress & 0x7F),
3195 shared_int->shared_intr_buf,
3196 1,
3197 intr_callback, shared_int,
3198 shared_int->intr_endp->bInterval);
3199
3200 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3201 if (result)
3202 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3203 result);
3204
3205 return result;
3206 }
3207
3208 /* operations setup of the serial interface */
3209 static const struct tty_operations hso_serial_ops = {
3210 .open = hso_serial_open,
3211 .close = hso_serial_close,
3212 .write = hso_serial_write,
3213 .write_room = hso_serial_write_room,
3214 .cleanup = hso_serial_cleanup,
3215 .ioctl = hso_serial_ioctl,
3216 .set_termios = hso_serial_set_termios,
3217 .chars_in_buffer = hso_serial_chars_in_buffer,
3218 .tiocmget = hso_serial_tiocmget,
3219 .tiocmset = hso_serial_tiocmset,
3220 .get_icount = hso_get_count,
3221 .unthrottle = hso_unthrottle
3222 };
3223
3224 static struct usb_driver hso_driver = {
3225 .name = driver_name,
3226 .probe = hso_probe,
3227 .disconnect = hso_disconnect,
3228 .id_table = hso_ids,
3229 .suspend = hso_suspend,
3230 .resume = hso_resume,
3231 .reset_resume = hso_resume,
3232 .supports_autosuspend = 1,
3233 .disable_hub_initiated_lpm = 1,
3234 };
3235
3236 static int __init hso_init(void)
3237 {
3238 int i;
3239 int result;
3240
3241 /* put it in the log */
3242 printk(KERN_INFO "hso: %s\n", version);
3243
3244 /* Initialise the serial table semaphore and table */
3245 spin_lock_init(&serial_table_lock);
3246 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3247 serial_table[i] = NULL;
3248
3249 /* allocate our driver using the proper amount of supported minors */
3250 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3251 if (!tty_drv)
3252 return -ENOMEM;
3253
3254 /* fill in all needed values */
3255 tty_drv->driver_name = driver_name;
3256 tty_drv->name = tty_filename;
3257
3258 /* if major number is provided as parameter, use that one */
3259 if (tty_major)
3260 tty_drv->major = tty_major;
3261
3262 tty_drv->minor_start = 0;
3263 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3264 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3265 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3266 tty_drv->init_termios = tty_std_termios;
3267 hso_init_termios(&tty_drv->init_termios);
3268 tty_set_operations(tty_drv, &hso_serial_ops);
3269
3270 /* register the tty driver */
3271 result = tty_register_driver(tty_drv);
3272 if (result) {
3273 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3274 __func__, result);
3275 goto err_free_tty;
3276 }
3277
3278 /* register this module as an usb driver */
3279 result = usb_register(&hso_driver);
3280 if (result) {
3281 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3282 result);
3283 goto err_unreg_tty;
3284 }
3285
3286 /* done */
3287 return 0;
3288 err_unreg_tty:
3289 tty_unregister_driver(tty_drv);
3290 err_free_tty:
3291 put_tty_driver(tty_drv);
3292 return result;
3293 }
3294
3295 static void __exit hso_exit(void)
3296 {
3297 printk(KERN_INFO "hso: unloaded\n");
3298
3299 tty_unregister_driver(tty_drv);
3300 put_tty_driver(tty_drv);
3301 /* deregister the usb driver */
3302 usb_deregister(&hso_driver);
3303 }
3304
3305 /* Module definitions */
3306 module_init(hso_init);
3307 module_exit(hso_exit);
3308
3309 MODULE_AUTHOR(MOD_AUTHOR);
3310 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3311 MODULE_LICENSE(MOD_LICENSE);
3312
3313 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3314 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3315 module_param(debug, int, S_IRUGO | S_IWUSR);
3316
3317 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3318 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3319 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3320
3321 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3322 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3323 module_param(disable_net, int, S_IRUGO | S_IWUSR);
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