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[deliverable/linux.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118 #define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124 #define D1(args...) D_(0x01, ##args)
125 #define D2(args...) D_(0x02, ##args)
126 #define D3(args...) D_(0x04, ##args)
127 #define D4(args...) D_(0x08, ##args)
128 #define D5(args...) D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_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 u16 curr_rx_urb_offset;
262 u8 rx_urb_filled[MAX_RX_URBS];
263 struct tasklet_struct unthrottle_tasklet;
264 struct work_struct retry_unthrottle_workqueue;
265 };
266
267 struct hso_device {
268 union {
269 struct hso_serial *dev_serial;
270 struct hso_net *dev_net;
271 } port_data;
272
273 u32 port_spec;
274
275 u8 is_active;
276 u8 usb_gone;
277 struct work_struct async_get_intf;
278 struct work_struct async_put_intf;
279 struct work_struct reset_device;
280
281 struct usb_device *usb;
282 struct usb_interface *interface;
283
284 struct device *dev;
285 struct kref ref;
286 struct mutex mutex;
287 };
288
289 /* Type of interface */
290 #define HSO_INTF_MASK 0xFF00
291 #define HSO_INTF_MUX 0x0100
292 #define HSO_INTF_BULK 0x0200
293
294 /* Type of port */
295 #define HSO_PORT_MASK 0xFF
296 #define HSO_PORT_NO_PORT 0x0
297 #define HSO_PORT_CONTROL 0x1
298 #define HSO_PORT_APP 0x2
299 #define HSO_PORT_GPS 0x3
300 #define HSO_PORT_PCSC 0x4
301 #define HSO_PORT_APP2 0x5
302 #define HSO_PORT_GPS_CONTROL 0x6
303 #define HSO_PORT_MSD 0x7
304 #define HSO_PORT_VOICE 0x8
305 #define HSO_PORT_DIAG2 0x9
306 #define HSO_PORT_DIAG 0x10
307 #define HSO_PORT_MODEM 0x11
308 #define HSO_PORT_NETWORK 0x12
309
310 /* Additional device info */
311 #define HSO_INFO_MASK 0xFF000000
312 #define HSO_INFO_CRC_BUG 0x01000000
313
314 /*****************************************************************************/
315 /* Prototypes */
316 /*****************************************************************************/
317 /* Serial driver functions */
318 static int hso_serial_tiocmset(struct tty_struct *tty,
319 unsigned int set, unsigned int clear);
320 static void ctrl_callback(struct urb *urb);
321 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
322 static void hso_kick_transmit(struct hso_serial *serial);
323 /* Helper functions */
324 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
325 struct usb_device *usb, gfp_t gfp);
326 static void handle_usb_error(int status, const char *function,
327 struct hso_device *hso_dev);
328 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
329 int type, int dir);
330 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
331 static void hso_free_interface(struct usb_interface *intf);
332 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
333 static int hso_stop_serial_device(struct hso_device *hso_dev);
334 static int hso_start_net_device(struct hso_device *hso_dev);
335 static void hso_free_shared_int(struct hso_shared_int *shared_int);
336 static int hso_stop_net_device(struct hso_device *hso_dev);
337 static void hso_serial_ref_free(struct kref *ref);
338 static void hso_std_serial_read_bulk_callback(struct urb *urb);
339 static int hso_mux_serial_read(struct hso_serial *serial);
340 static void async_get_intf(struct work_struct *data);
341 static void async_put_intf(struct work_struct *data);
342 static int hso_put_activity(struct hso_device *hso_dev);
343 static int hso_get_activity(struct hso_device *hso_dev);
344 static void tiocmget_intr_callback(struct urb *urb);
345 static void reset_device(struct work_struct *data);
346 /*****************************************************************************/
347 /* Helping functions */
348 /*****************************************************************************/
349
350 /* #define DEBUG */
351
352 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
353 {
354 return hso_dev->port_data.dev_net;
355 }
356
357 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
358 {
359 return hso_dev->port_data.dev_serial;
360 }
361
362 /* Debugging functions */
363 #ifdef DEBUG
364 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
365 unsigned int len)
366 {
367 static char name[255];
368
369 sprintf(name, "hso[%d:%s]", line_count, func_name);
370 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
371 }
372
373 #define DUMP(buf_, len_) \
374 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
375
376 #define DUMP1(buf_, len_) \
377 do { \
378 if (0x01 & debug) \
379 DUMP(buf_, len_); \
380 } while (0)
381 #else
382 #define DUMP(buf_, len_)
383 #define DUMP1(buf_, len_)
384 #endif
385
386 /* module parameters */
387 static int debug;
388 static int tty_major;
389 static int disable_net;
390
391 /* driver info */
392 static const char driver_name[] = "hso";
393 static const char tty_filename[] = "ttyHS";
394 static const char *version = __FILE__ ": " MOD_AUTHOR;
395 /* the usb driver itself (registered in hso_init) */
396 static struct usb_driver hso_driver;
397 /* serial structures */
398 static struct tty_driver *tty_drv;
399 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
400 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
401 static spinlock_t serial_table_lock;
402
403 static const s32 default_port_spec[] = {
404 HSO_INTF_MUX | HSO_PORT_NETWORK,
405 HSO_INTF_BULK | HSO_PORT_DIAG,
406 HSO_INTF_BULK | HSO_PORT_MODEM,
407 0
408 };
409
410 static const s32 icon321_port_spec[] = {
411 HSO_INTF_MUX | HSO_PORT_NETWORK,
412 HSO_INTF_BULK | HSO_PORT_DIAG2,
413 HSO_INTF_BULK | HSO_PORT_MODEM,
414 HSO_INTF_BULK | HSO_PORT_DIAG,
415 0
416 };
417
418 #define default_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)default_port_spec
421
422 #define icon321_port_device(vendor, product) \
423 USB_DEVICE(vendor, product), \
424 .driver_info = (kernel_ulong_t)icon321_port_spec
425
426 /* list of devices we support */
427 static const struct usb_device_id hso_ids[] = {
428 {default_port_device(0x0af0, 0x6711)},
429 {default_port_device(0x0af0, 0x6731)},
430 {default_port_device(0x0af0, 0x6751)},
431 {default_port_device(0x0af0, 0x6771)},
432 {default_port_device(0x0af0, 0x6791)},
433 {default_port_device(0x0af0, 0x6811)},
434 {default_port_device(0x0af0, 0x6911)},
435 {default_port_device(0x0af0, 0x6951)},
436 {default_port_device(0x0af0, 0x6971)},
437 {default_port_device(0x0af0, 0x7011)},
438 {default_port_device(0x0af0, 0x7031)},
439 {default_port_device(0x0af0, 0x7051)},
440 {default_port_device(0x0af0, 0x7071)},
441 {default_port_device(0x0af0, 0x7111)},
442 {default_port_device(0x0af0, 0x7211)},
443 {default_port_device(0x0af0, 0x7251)},
444 {default_port_device(0x0af0, 0x7271)},
445 {default_port_device(0x0af0, 0x7311)},
446 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
447 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
448 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
449 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
450 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
451 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
454 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
455 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
456 {USB_DEVICE(0x0af0, 0x7701)},
457 {USB_DEVICE(0x0af0, 0x7706)},
458 {USB_DEVICE(0x0af0, 0x7801)},
459 {USB_DEVICE(0x0af0, 0x7901)},
460 {USB_DEVICE(0x0af0, 0x7A01)},
461 {USB_DEVICE(0x0af0, 0x7A05)},
462 {USB_DEVICE(0x0af0, 0x8200)},
463 {USB_DEVICE(0x0af0, 0x8201)},
464 {USB_DEVICE(0x0af0, 0x8300)},
465 {USB_DEVICE(0x0af0, 0x8302)},
466 {USB_DEVICE(0x0af0, 0x8304)},
467 {USB_DEVICE(0x0af0, 0x8400)},
468 {USB_DEVICE(0x0af0, 0x8600)},
469 {USB_DEVICE(0x0af0, 0x8800)},
470 {USB_DEVICE(0x0af0, 0x8900)},
471 {USB_DEVICE(0x0af0, 0x9000)},
472 {USB_DEVICE(0x0af0, 0xd035)},
473 {USB_DEVICE(0x0af0, 0xd055)},
474 {USB_DEVICE(0x0af0, 0xd155)},
475 {USB_DEVICE(0x0af0, 0xd255)},
476 {USB_DEVICE(0x0af0, 0xd057)},
477 {USB_DEVICE(0x0af0, 0xd157)},
478 {USB_DEVICE(0x0af0, 0xd257)},
479 {USB_DEVICE(0x0af0, 0xd357)},
480 {USB_DEVICE(0x0af0, 0xd058)},
481 {USB_DEVICE(0x0af0, 0xc100)},
482 {}
483 };
484 MODULE_DEVICE_TABLE(usb, hso_ids);
485
486 /* Sysfs attribute */
487 static ssize_t hso_sysfs_show_porttype(struct device *dev,
488 struct device_attribute *attr,
489 char *buf)
490 {
491 struct hso_device *hso_dev = dev_get_drvdata(dev);
492 char *port_name;
493
494 if (!hso_dev)
495 return 0;
496
497 switch (hso_dev->port_spec & HSO_PORT_MASK) {
498 case HSO_PORT_CONTROL:
499 port_name = "Control";
500 break;
501 case HSO_PORT_APP:
502 port_name = "Application";
503 break;
504 case HSO_PORT_APP2:
505 port_name = "Application2";
506 break;
507 case HSO_PORT_GPS:
508 port_name = "GPS";
509 break;
510 case HSO_PORT_GPS_CONTROL:
511 port_name = "GPS Control";
512 break;
513 case HSO_PORT_PCSC:
514 port_name = "PCSC";
515 break;
516 case HSO_PORT_DIAG:
517 port_name = "Diagnostic";
518 break;
519 case HSO_PORT_DIAG2:
520 port_name = "Diagnostic2";
521 break;
522 case HSO_PORT_MODEM:
523 port_name = "Modem";
524 break;
525 case HSO_PORT_NETWORK:
526 port_name = "Network";
527 break;
528 default:
529 port_name = "Unknown";
530 break;
531 }
532
533 return sprintf(buf, "%s\n", port_name);
534 }
535 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
536
537 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
538 {
539 int idx;
540
541 for (idx = 0; idx < serial->num_rx_urbs; idx++)
542 if (serial->rx_urb[idx] == urb)
543 return idx;
544 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
545 return -1;
546 }
547
548 /* converts mux value to a port spec value */
549 static u32 hso_mux_to_port(int mux)
550 {
551 u32 result;
552
553 switch (mux) {
554 case 0x1:
555 result = HSO_PORT_CONTROL;
556 break;
557 case 0x2:
558 result = HSO_PORT_APP;
559 break;
560 case 0x4:
561 result = HSO_PORT_PCSC;
562 break;
563 case 0x8:
564 result = HSO_PORT_GPS;
565 break;
566 case 0x10:
567 result = HSO_PORT_APP2;
568 break;
569 default:
570 result = HSO_PORT_NO_PORT;
571 }
572 return result;
573 }
574
575 /* converts port spec value to a mux value */
576 static u32 hso_port_to_mux(int port)
577 {
578 u32 result;
579
580 switch (port & HSO_PORT_MASK) {
581 case HSO_PORT_CONTROL:
582 result = 0x0;
583 break;
584 case HSO_PORT_APP:
585 result = 0x1;
586 break;
587 case HSO_PORT_PCSC:
588 result = 0x2;
589 break;
590 case HSO_PORT_GPS:
591 result = 0x3;
592 break;
593 case HSO_PORT_APP2:
594 result = 0x4;
595 break;
596 default:
597 result = 0x0;
598 }
599 return result;
600 }
601
602 static struct hso_serial *get_serial_by_shared_int_and_type(
603 struct hso_shared_int *shared_int,
604 int mux)
605 {
606 int i, port;
607
608 port = hso_mux_to_port(mux);
609
610 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
611 if (serial_table[i] &&
612 (dev2ser(serial_table[i])->shared_int == shared_int) &&
613 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
614 return dev2ser(serial_table[i]);
615 }
616 }
617
618 return NULL;
619 }
620
621 static struct hso_serial *get_serial_by_index(unsigned index)
622 {
623 struct hso_serial *serial = NULL;
624 unsigned long flags;
625
626 spin_lock_irqsave(&serial_table_lock, flags);
627 if (serial_table[index])
628 serial = dev2ser(serial_table[index]);
629 spin_unlock_irqrestore(&serial_table_lock, flags);
630
631 return serial;
632 }
633
634 static int get_free_serial_index(void)
635 {
636 int index;
637 unsigned long flags;
638
639 spin_lock_irqsave(&serial_table_lock, flags);
640 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
641 if (serial_table[index] == NULL) {
642 spin_unlock_irqrestore(&serial_table_lock, flags);
643 return index;
644 }
645 }
646 spin_unlock_irqrestore(&serial_table_lock, flags);
647
648 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
649 return -1;
650 }
651
652 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
653 {
654 unsigned long flags;
655
656 spin_lock_irqsave(&serial_table_lock, flags);
657 if (serial)
658 serial_table[index] = serial->parent;
659 else
660 serial_table[index] = NULL;
661 spin_unlock_irqrestore(&serial_table_lock, flags);
662 }
663
664 static void handle_usb_error(int status, const char *function,
665 struct hso_device *hso_dev)
666 {
667 char *explanation;
668
669 switch (status) {
670 case -ENODEV:
671 explanation = "no device";
672 break;
673 case -ENOENT:
674 explanation = "endpoint not enabled";
675 break;
676 case -EPIPE:
677 explanation = "endpoint stalled";
678 break;
679 case -ENOSPC:
680 explanation = "not enough bandwidth";
681 break;
682 case -ESHUTDOWN:
683 explanation = "device disabled";
684 break;
685 case -EHOSTUNREACH:
686 explanation = "device suspended";
687 break;
688 case -EINVAL:
689 case -EAGAIN:
690 case -EFBIG:
691 case -EMSGSIZE:
692 explanation = "internal error";
693 break;
694 case -EILSEQ:
695 case -EPROTO:
696 case -ETIME:
697 case -ETIMEDOUT:
698 explanation = "protocol error";
699 if (hso_dev)
700 schedule_work(&hso_dev->reset_device);
701 break;
702 default:
703 explanation = "unknown status";
704 break;
705 }
706
707 /* log a meaningful explanation of an USB status */
708 D1("%s: received USB status - %s (%d)", function, explanation, status);
709 }
710
711 /* Network interface functions */
712
713 /* called when net interface is brought up by ifconfig */
714 static int hso_net_open(struct net_device *net)
715 {
716 struct hso_net *odev = netdev_priv(net);
717 unsigned long flags = 0;
718
719 if (!odev) {
720 dev_err(&net->dev, "No net device !\n");
721 return -ENODEV;
722 }
723
724 odev->skb_tx_buf = NULL;
725
726 /* setup environment */
727 spin_lock_irqsave(&odev->net_lock, flags);
728 odev->rx_parse_state = WAIT_IP;
729 odev->rx_buf_size = 0;
730 odev->rx_buf_missing = sizeof(struct iphdr);
731 spin_unlock_irqrestore(&odev->net_lock, flags);
732
733 /* We are up and running. */
734 set_bit(HSO_NET_RUNNING, &odev->flags);
735 hso_start_net_device(odev->parent);
736
737 /* Tell the kernel we are ready to start receiving from it */
738 netif_start_queue(net);
739
740 return 0;
741 }
742
743 /* called when interface is brought down by ifconfig */
744 static int hso_net_close(struct net_device *net)
745 {
746 struct hso_net *odev = netdev_priv(net);
747
748 /* we don't need the queue anymore */
749 netif_stop_queue(net);
750 /* no longer running */
751 clear_bit(HSO_NET_RUNNING, &odev->flags);
752
753 hso_stop_net_device(odev->parent);
754
755 /* done */
756 return 0;
757 }
758
759 /* USB tells is xmit done, we should start the netqueue again */
760 static void write_bulk_callback(struct urb *urb)
761 {
762 struct hso_net *odev = urb->context;
763 int status = urb->status;
764
765 /* Sanity check */
766 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
767 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
768 return;
769 }
770
771 /* Do we still have a valid kernel network device? */
772 if (!netif_device_present(odev->net)) {
773 dev_err(&urb->dev->dev, "%s: net device not present\n",
774 __func__);
775 return;
776 }
777
778 /* log status, but don't act on it, we don't need to resubmit anything
779 * anyhow */
780 if (status)
781 handle_usb_error(status, __func__, odev->parent);
782
783 hso_put_activity(odev->parent);
784
785 /* Tell the network interface we are ready for another frame */
786 netif_wake_queue(odev->net);
787 }
788
789 /* called by kernel when we need to transmit a packet */
790 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
791 struct net_device *net)
792 {
793 struct hso_net *odev = netdev_priv(net);
794 int result;
795
796 /* Tell the kernel, "No more frames 'til we are done with this one." */
797 netif_stop_queue(net);
798 if (hso_get_activity(odev->parent) == -EAGAIN) {
799 odev->skb_tx_buf = skb;
800 return NETDEV_TX_OK;
801 }
802
803 /* log if asked */
804 DUMP1(skb->data, skb->len);
805 /* Copy it from kernel memory to OUR memory */
806 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
807 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
808
809 /* Fill in the URB for shipping it out. */
810 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
811 odev->parent->usb,
812 usb_sndbulkpipe(odev->parent->usb,
813 odev->out_endp->
814 bEndpointAddress & 0x7F),
815 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
816 odev);
817
818 /* Deal with the Zero Length packet problem, I hope */
819 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
820
821 /* Send the URB on its merry way. */
822 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
823 if (result) {
824 dev_warn(&odev->parent->interface->dev,
825 "failed mux_bulk_tx_urb %d\n", result);
826 net->stats.tx_errors++;
827 netif_start_queue(net);
828 } else {
829 net->stats.tx_packets++;
830 net->stats.tx_bytes += skb->len;
831 }
832 dev_kfree_skb(skb);
833 /* we're done */
834 return NETDEV_TX_OK;
835 }
836
837 static const struct ethtool_ops ops = {
838 .get_link = ethtool_op_get_link
839 };
840
841 /* called when a packet did not ack after watchdogtimeout */
842 static void hso_net_tx_timeout(struct net_device *net)
843 {
844 struct hso_net *odev = netdev_priv(net);
845
846 if (!odev)
847 return;
848
849 /* Tell syslog we are hosed. */
850 dev_warn(&net->dev, "Tx timed out.\n");
851
852 /* Tear the waiting frame off the list */
853 if (odev->mux_bulk_tx_urb &&
854 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
855 usb_unlink_urb(odev->mux_bulk_tx_urb);
856
857 /* Update statistics */
858 net->stats.tx_errors++;
859 }
860
861 /* make a real packet from the received USB buffer */
862 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
863 unsigned int count, unsigned char is_eop)
864 {
865 unsigned short temp_bytes;
866 unsigned short buffer_offset = 0;
867 unsigned short frame_len;
868 unsigned char *tmp_rx_buf;
869
870 /* log if needed */
871 D1("Rx %d bytes", count);
872 DUMP(ip_pkt, min(128, (int)count));
873
874 while (count) {
875 switch (odev->rx_parse_state) {
876 case WAIT_IP:
877 /* waiting for IP header. */
878 /* wanted bytes - size of ip header */
879 temp_bytes =
880 (count <
881 odev->rx_buf_missing) ? count : odev->
882 rx_buf_missing;
883
884 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
885 odev->rx_buf_size, ip_pkt + buffer_offset,
886 temp_bytes);
887
888 odev->rx_buf_size += temp_bytes;
889 buffer_offset += temp_bytes;
890 odev->rx_buf_missing -= temp_bytes;
891 count -= temp_bytes;
892
893 if (!odev->rx_buf_missing) {
894 /* header is complete allocate an sk_buffer and
895 * continue to WAIT_DATA */
896 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
897
898 if ((frame_len > DEFAULT_MRU) ||
899 (frame_len < sizeof(struct iphdr))) {
900 dev_err(&odev->net->dev,
901 "Invalid frame (%d) length\n",
902 frame_len);
903 odev->rx_parse_state = WAIT_SYNC;
904 continue;
905 }
906 /* Allocate an sk_buff */
907 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
908 frame_len);
909 if (!odev->skb_rx_buf) {
910 /* We got no receive buffer. */
911 D1("could not allocate memory");
912 odev->rx_parse_state = WAIT_SYNC;
913 return;
914 }
915
916 /* Copy what we got so far. make room for iphdr
917 * after tail. */
918 tmp_rx_buf =
919 skb_put(odev->skb_rx_buf,
920 sizeof(struct iphdr));
921 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
922 sizeof(struct iphdr));
923
924 /* ETH_HLEN */
925 odev->rx_buf_size = sizeof(struct iphdr);
926
927 /* Filip actually use .tot_len */
928 odev->rx_buf_missing =
929 frame_len - sizeof(struct iphdr);
930 odev->rx_parse_state = WAIT_DATA;
931 }
932 break;
933
934 case WAIT_DATA:
935 temp_bytes = (count < odev->rx_buf_missing)
936 ? count : odev->rx_buf_missing;
937
938 /* Copy the rest of the bytes that are left in the
939 * buffer into the waiting sk_buf. */
940 /* Make room for temp_bytes after tail. */
941 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
942 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
943
944 odev->rx_buf_missing -= temp_bytes;
945 count -= temp_bytes;
946 buffer_offset += temp_bytes;
947 odev->rx_buf_size += temp_bytes;
948 if (!odev->rx_buf_missing) {
949 /* Packet is complete. Inject into stack. */
950 /* We have IP packet here */
951 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
952 skb_reset_mac_header(odev->skb_rx_buf);
953
954 /* Ship it off to the kernel */
955 netif_rx(odev->skb_rx_buf);
956 /* No longer our buffer. */
957 odev->skb_rx_buf = NULL;
958
959 /* update out statistics */
960 odev->net->stats.rx_packets++;
961
962 odev->net->stats.rx_bytes += odev->rx_buf_size;
963
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 odev->rx_parse_state = WAIT_IP;
967 }
968 break;
969
970 case WAIT_SYNC:
971 D1(" W_S");
972 count = 0;
973 break;
974 default:
975 D1(" ");
976 count--;
977 break;
978 }
979 }
980
981 /* Recovery mechanism for WAIT_SYNC state. */
982 if (is_eop) {
983 if (odev->rx_parse_state == WAIT_SYNC) {
984 odev->rx_parse_state = WAIT_IP;
985 odev->rx_buf_size = 0;
986 odev->rx_buf_missing = sizeof(struct iphdr);
987 }
988 }
989 }
990
991 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
992 {
993 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
994 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
995
996 if (((rest == 5) || (rest == 6)) &&
997 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
998 crc_check, 4)) {
999 urb->actual_length -= 4;
1000 }
1001 }
1002
1003 /* Moving data from usb to kernel (in interrupt state) */
1004 static void read_bulk_callback(struct urb *urb)
1005 {
1006 struct hso_net *odev = urb->context;
1007 struct net_device *net;
1008 int result;
1009 int status = urb->status;
1010
1011 /* is al ok? (Filip: Who's Al ?) */
1012 if (status) {
1013 handle_usb_error(status, __func__, odev->parent);
1014 return;
1015 }
1016
1017 /* Sanity check */
1018 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1019 D1("BULK IN callback but driver is not active!");
1020 return;
1021 }
1022 usb_mark_last_busy(urb->dev);
1023
1024 net = odev->net;
1025
1026 if (!netif_device_present(net)) {
1027 /* Somebody killed our network interface... */
1028 return;
1029 }
1030
1031 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1032 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1033
1034 /* do we even have a packet? */
1035 if (urb->actual_length) {
1036 /* Handle the IP stream, add header and push it onto network
1037 * stack if the packet is complete. */
1038 spin_lock(&odev->net_lock);
1039 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1040 (urb->transfer_buffer_length >
1041 urb->actual_length) ? 1 : 0);
1042 spin_unlock(&odev->net_lock);
1043 }
1044
1045 /* We are done with this URB, resubmit it. Prep the USB to wait for
1046 * another frame. Reuse same as received. */
1047 usb_fill_bulk_urb(urb,
1048 odev->parent->usb,
1049 usb_rcvbulkpipe(odev->parent->usb,
1050 odev->in_endp->
1051 bEndpointAddress & 0x7F),
1052 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1053 read_bulk_callback, odev);
1054
1055 /* Give this to the USB subsystem so it can tell us when more data
1056 * arrives. */
1057 result = usb_submit_urb(urb, GFP_ATOMIC);
1058 if (result)
1059 dev_warn(&odev->parent->interface->dev,
1060 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1061 result);
1062 }
1063
1064 /* Serial driver functions */
1065
1066 static void hso_init_termios(struct ktermios *termios)
1067 {
1068 /*
1069 * The default requirements for this device are:
1070 */
1071 termios->c_iflag &=
1072 ~(IGNBRK /* disable ignore break */
1073 | BRKINT /* disable break causes interrupt */
1074 | PARMRK /* disable mark parity errors */
1075 | ISTRIP /* disable clear high bit of input characters */
1076 | INLCR /* disable translate NL to CR */
1077 | IGNCR /* disable ignore CR */
1078 | ICRNL /* disable translate CR to NL */
1079 | IXON); /* disable enable XON/XOFF flow control */
1080
1081 /* disable postprocess output characters */
1082 termios->c_oflag &= ~OPOST;
1083
1084 termios->c_lflag &=
1085 ~(ECHO /* disable echo input characters */
1086 | ECHONL /* disable echo new line */
1087 | ICANON /* disable erase, kill, werase, and rprnt
1088 special characters */
1089 | ISIG /* disable interrupt, quit, and suspend special
1090 characters */
1091 | IEXTEN); /* disable non-POSIX special characters */
1092
1093 termios->c_cflag &=
1094 ~(CSIZE /* no size */
1095 | PARENB /* disable parity bit */
1096 | CBAUD /* clear current baud rate */
1097 | CBAUDEX); /* clear current buad rate */
1098
1099 termios->c_cflag |= CS8; /* character size 8 bits */
1100
1101 /* baud rate 115200 */
1102 tty_termios_encode_baud_rate(termios, 115200, 115200);
1103 }
1104
1105 static void _hso_serial_set_termios(struct tty_struct *tty,
1106 struct ktermios *old)
1107 {
1108 struct hso_serial *serial = tty->driver_data;
1109
1110 if (!serial) {
1111 printk(KERN_ERR "%s: no tty structures", __func__);
1112 return;
1113 }
1114
1115 D4("port %d", serial->minor);
1116
1117 /*
1118 * Fix up unsupported bits
1119 */
1120 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1121
1122 tty->termios.c_cflag &=
1123 ~(CSIZE /* no size */
1124 | PARENB /* disable parity bit */
1125 | CBAUD /* clear current baud rate */
1126 | CBAUDEX); /* clear current buad rate */
1127
1128 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1129
1130 /* baud rate 115200 */
1131 tty_encode_baud_rate(tty, 115200, 115200);
1132 }
1133
1134 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1135 {
1136 int result;
1137 /* We are done with this URB, resubmit it. Prep the USB to wait for
1138 * another frame */
1139 usb_fill_bulk_urb(urb, serial->parent->usb,
1140 usb_rcvbulkpipe(serial->parent->usb,
1141 serial->in_endp->
1142 bEndpointAddress & 0x7F),
1143 urb->transfer_buffer, serial->rx_data_length,
1144 hso_std_serial_read_bulk_callback, serial);
1145 /* Give this to the USB subsystem so it can tell us when more data
1146 * arrives. */
1147 result = usb_submit_urb(urb, GFP_ATOMIC);
1148 if (result) {
1149 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1150 __func__, result);
1151 }
1152 }
1153
1154
1155
1156
1157 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1158 {
1159 int count;
1160 struct urb *curr_urb;
1161
1162 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1163 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1164 count = put_rxbuf_data(curr_urb, serial);
1165 if (count == -1)
1166 return;
1167 if (count == 0) {
1168 serial->curr_rx_urb_idx++;
1169 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1170 serial->curr_rx_urb_idx = 0;
1171 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1172 }
1173 }
1174 }
1175
1176 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1177 {
1178 int count = 0;
1179 struct urb *urb;
1180
1181 urb = serial->rx_urb[0];
1182 if (serial->port.count > 0) {
1183 count = put_rxbuf_data(urb, serial);
1184 if (count == -1)
1185 return;
1186 }
1187 /* Re issue a read as long as we receive data. */
1188
1189 if (count == 0 && ((urb->actual_length != 0) ||
1190 (serial->rx_state == RX_PENDING))) {
1191 serial->rx_state = RX_SENT;
1192 hso_mux_serial_read(serial);
1193 } else
1194 serial->rx_state = RX_IDLE;
1195 }
1196
1197
1198 /* read callback for Diag and CS port */
1199 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1200 {
1201 struct hso_serial *serial = urb->context;
1202 int status = urb->status;
1203
1204 /* sanity check */
1205 if (!serial) {
1206 D1("serial == NULL");
1207 return;
1208 } else if (status) {
1209 handle_usb_error(status, __func__, serial->parent);
1210 return;
1211 }
1212
1213 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1214 D1("Actual length = %d\n", urb->actual_length);
1215 DUMP1(urb->transfer_buffer, urb->actual_length);
1216
1217 /* Anyone listening? */
1218 if (serial->port.count == 0)
1219 return;
1220
1221 if (status == 0) {
1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1223 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1224 /* Valid data, handle RX data */
1225 spin_lock(&serial->serial_lock);
1226 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1227 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1228 spin_unlock(&serial->serial_lock);
1229 } else if (status == -ENOENT || status == -ECONNRESET) {
1230 /* Unlinked - check for throttled port. */
1231 D2("Port %d, successfully unlinked urb", serial->minor);
1232 spin_lock(&serial->serial_lock);
1233 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1234 hso_resubmit_rx_bulk_urb(serial, urb);
1235 spin_unlock(&serial->serial_lock);
1236 } else {
1237 D2("Port %d, status = %d for read urb", serial->minor, status);
1238 return;
1239 }
1240 }
1241
1242 /*
1243 * This needs to be a tasklet otherwise we will
1244 * end up recursively calling this function.
1245 */
1246 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1247 {
1248 unsigned long flags;
1249
1250 spin_lock_irqsave(&serial->serial_lock, flags);
1251 if ((serial->parent->port_spec & HSO_INTF_MUX))
1252 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1253 else
1254 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1255 spin_unlock_irqrestore(&serial->serial_lock, flags);
1256 }
1257
1258 static void hso_unthrottle(struct tty_struct *tty)
1259 {
1260 struct hso_serial *serial = tty->driver_data;
1261
1262 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1263 }
1264
1265 static void hso_unthrottle_workfunc(struct work_struct *work)
1266 {
1267 struct hso_serial *serial =
1268 container_of(work, struct hso_serial,
1269 retry_unthrottle_workqueue);
1270 hso_unthrottle_tasklet(serial);
1271 }
1272
1273 /* open the requested serial port */
1274 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1275 {
1276 struct hso_serial *serial = get_serial_by_index(tty->index);
1277 int result;
1278
1279 /* sanity check */
1280 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1281 WARN_ON(1);
1282 tty->driver_data = NULL;
1283 D1("Failed to open port");
1284 return -ENODEV;
1285 }
1286
1287 mutex_lock(&serial->parent->mutex);
1288 result = usb_autopm_get_interface(serial->parent->interface);
1289 if (result < 0)
1290 goto err_out;
1291
1292 D1("Opening %d", serial->minor);
1293 kref_get(&serial->parent->ref);
1294
1295 /* setup */
1296 tty->driver_data = serial;
1297 tty_port_tty_set(&serial->port, tty);
1298
1299 /* check for port already opened, if not set the termios */
1300 serial->port.count++;
1301 if (serial->port.count == 1) {
1302 serial->rx_state = RX_IDLE;
1303 /* Force default termio settings */
1304 _hso_serial_set_termios(tty, NULL);
1305 tasklet_init(&serial->unthrottle_tasklet,
1306 (void (*)(unsigned long))hso_unthrottle_tasklet,
1307 (unsigned long)serial);
1308 INIT_WORK(&serial->retry_unthrottle_workqueue,
1309 hso_unthrottle_workfunc);
1310 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1311 if (result) {
1312 hso_stop_serial_device(serial->parent);
1313 serial->port.count--;
1314 kref_put(&serial->parent->ref, hso_serial_ref_free);
1315 }
1316 } else {
1317 D1("Port was already open");
1318 }
1319
1320 usb_autopm_put_interface(serial->parent->interface);
1321
1322 /* done */
1323 if (result)
1324 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1325 err_out:
1326 mutex_unlock(&serial->parent->mutex);
1327 return result;
1328 }
1329
1330 /* close the requested serial port */
1331 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1332 {
1333 struct hso_serial *serial = tty->driver_data;
1334 u8 usb_gone;
1335
1336 D1("Closing serial port");
1337
1338 /* Open failed, no close cleanup required */
1339 if (serial == NULL)
1340 return;
1341
1342 mutex_lock(&serial->parent->mutex);
1343 usb_gone = serial->parent->usb_gone;
1344
1345 if (!usb_gone)
1346 usb_autopm_get_interface(serial->parent->interface);
1347
1348 /* reset the rts and dtr */
1349 /* do the actual close */
1350 serial->port.count--;
1351
1352 if (serial->port.count <= 0) {
1353 serial->port.count = 0;
1354 tty_port_tty_set(&serial->port, NULL);
1355 if (!usb_gone)
1356 hso_stop_serial_device(serial->parent);
1357 tasklet_kill(&serial->unthrottle_tasklet);
1358 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1359 }
1360
1361 if (!usb_gone)
1362 usb_autopm_put_interface(serial->parent->interface);
1363
1364 mutex_unlock(&serial->parent->mutex);
1365
1366 kref_put(&serial->parent->ref, hso_serial_ref_free);
1367 }
1368
1369 /* close the requested serial port */
1370 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1371 int count)
1372 {
1373 struct hso_serial *serial = tty->driver_data;
1374 int space, tx_bytes;
1375 unsigned long flags;
1376
1377 /* sanity check */
1378 if (serial == NULL) {
1379 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1380 return -ENODEV;
1381 }
1382
1383 spin_lock_irqsave(&serial->serial_lock, flags);
1384
1385 space = serial->tx_data_length - serial->tx_buffer_count;
1386 tx_bytes = (count < space) ? count : space;
1387
1388 if (!tx_bytes)
1389 goto out;
1390
1391 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1392 serial->tx_buffer_count += tx_bytes;
1393
1394 out:
1395 spin_unlock_irqrestore(&serial->serial_lock, flags);
1396
1397 hso_kick_transmit(serial);
1398 /* done */
1399 return tx_bytes;
1400 }
1401
1402 /* how much room is there for writing */
1403 static int hso_serial_write_room(struct tty_struct *tty)
1404 {
1405 struct hso_serial *serial = tty->driver_data;
1406 int room;
1407 unsigned long flags;
1408
1409 spin_lock_irqsave(&serial->serial_lock, flags);
1410 room = serial->tx_data_length - serial->tx_buffer_count;
1411 spin_unlock_irqrestore(&serial->serial_lock, flags);
1412
1413 /* return free room */
1414 return room;
1415 }
1416
1417 /* setup the term */
1418 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1419 {
1420 struct hso_serial *serial = tty->driver_data;
1421 unsigned long flags;
1422
1423 if (old)
1424 D5("Termios called with: cflags new[%d] - old[%d]",
1425 tty->termios.c_cflag, old->c_cflag);
1426
1427 /* the actual setup */
1428 spin_lock_irqsave(&serial->serial_lock, flags);
1429 if (serial->port.count)
1430 _hso_serial_set_termios(tty, old);
1431 else
1432 tty->termios = *old;
1433 spin_unlock_irqrestore(&serial->serial_lock, flags);
1434
1435 /* done */
1436 }
1437
1438 /* how many characters in the buffer */
1439 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1440 {
1441 struct hso_serial *serial = tty->driver_data;
1442 int chars;
1443 unsigned long flags;
1444
1445 /* sanity check */
1446 if (serial == NULL)
1447 return 0;
1448
1449 spin_lock_irqsave(&serial->serial_lock, flags);
1450 chars = serial->tx_buffer_count;
1451 spin_unlock_irqrestore(&serial->serial_lock, flags);
1452
1453 return chars;
1454 }
1455 static int tiocmget_submit_urb(struct hso_serial *serial,
1456 struct hso_tiocmget *tiocmget,
1457 struct usb_device *usb)
1458 {
1459 int result;
1460
1461 if (serial->parent->usb_gone)
1462 return -ENODEV;
1463 usb_fill_int_urb(tiocmget->urb, usb,
1464 usb_rcvintpipe(usb,
1465 tiocmget->endp->
1466 bEndpointAddress & 0x7F),
1467 &tiocmget->serial_state_notification,
1468 sizeof(struct hso_serial_state_notification),
1469 tiocmget_intr_callback, serial,
1470 tiocmget->endp->bInterval);
1471 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1472 if (result) {
1473 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1474 result);
1475 }
1476 return result;
1477
1478 }
1479
1480 static void tiocmget_intr_callback(struct urb *urb)
1481 {
1482 struct hso_serial *serial = urb->context;
1483 struct hso_tiocmget *tiocmget;
1484 int status = urb->status;
1485 u16 UART_state_bitmap, prev_UART_state_bitmap;
1486 struct uart_icount *icount;
1487 struct hso_serial_state_notification *serial_state_notification;
1488 struct usb_device *usb;
1489 int if_num;
1490
1491 /* Sanity checks */
1492 if (!serial)
1493 return;
1494 if (status) {
1495 handle_usb_error(status, __func__, serial->parent);
1496 return;
1497 }
1498
1499 /* tiocmget is only supported on HSO_PORT_MODEM */
1500 tiocmget = serial->tiocmget;
1501 if (!tiocmget)
1502 return;
1503 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1504
1505 usb = serial->parent->usb;
1506 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1507
1508 /* wIndex should be the USB interface number of the port to which the
1509 * notification applies, which should always be the Modem port.
1510 */
1511 serial_state_notification = &tiocmget->serial_state_notification;
1512 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1513 serial_state_notification->bNotification != B_NOTIFICATION ||
1514 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1515 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1516 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1517 dev_warn(&usb->dev,
1518 "hso received invalid serial state notification\n");
1519 DUMP(serial_state_notification,
1520 sizeof(struct hso_serial_state_notification));
1521 } else {
1522
1523 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1524 UART_state_bitmap);
1525 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1526 icount = &tiocmget->icount;
1527 spin_lock(&serial->serial_lock);
1528 if ((UART_state_bitmap & B_OVERRUN) !=
1529 (prev_UART_state_bitmap & B_OVERRUN))
1530 icount->parity++;
1531 if ((UART_state_bitmap & B_PARITY) !=
1532 (prev_UART_state_bitmap & B_PARITY))
1533 icount->parity++;
1534 if ((UART_state_bitmap & B_FRAMING) !=
1535 (prev_UART_state_bitmap & B_FRAMING))
1536 icount->frame++;
1537 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1538 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1539 icount->rng++;
1540 if ((UART_state_bitmap & B_BREAK) !=
1541 (prev_UART_state_bitmap & B_BREAK))
1542 icount->brk++;
1543 if ((UART_state_bitmap & B_TX_CARRIER) !=
1544 (prev_UART_state_bitmap & B_TX_CARRIER))
1545 icount->dsr++;
1546 if ((UART_state_bitmap & B_RX_CARRIER) !=
1547 (prev_UART_state_bitmap & B_RX_CARRIER))
1548 icount->dcd++;
1549 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1550 spin_unlock(&serial->serial_lock);
1551 tiocmget->intr_completed = 1;
1552 wake_up_interruptible(&tiocmget->waitq);
1553 }
1554 memset(serial_state_notification, 0,
1555 sizeof(struct hso_serial_state_notification));
1556 tiocmget_submit_urb(serial,
1557 tiocmget,
1558 serial->parent->usb);
1559 }
1560
1561 /*
1562 * next few functions largely stolen from drivers/serial/serial_core.c
1563 */
1564 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1565 * - mask passed in arg for lines of interest
1566 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1567 * Caller should use TIOCGICOUNT to see which one it was
1568 */
1569 static int
1570 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1571 {
1572 DECLARE_WAITQUEUE(wait, current);
1573 struct uart_icount cprev, cnow;
1574 struct hso_tiocmget *tiocmget;
1575 int ret;
1576
1577 tiocmget = serial->tiocmget;
1578 if (!tiocmget)
1579 return -ENOENT;
1580 /*
1581 * note the counters on entry
1582 */
1583 spin_lock_irq(&serial->serial_lock);
1584 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1585 spin_unlock_irq(&serial->serial_lock);
1586 add_wait_queue(&tiocmget->waitq, &wait);
1587 for (;;) {
1588 spin_lock_irq(&serial->serial_lock);
1589 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1590 spin_unlock_irq(&serial->serial_lock);
1591 set_current_state(TASK_INTERRUPTIBLE);
1592 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1593 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1594 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1595 ret = 0;
1596 break;
1597 }
1598 schedule();
1599 /* see if a signal did it */
1600 if (signal_pending(current)) {
1601 ret = -ERESTARTSYS;
1602 break;
1603 }
1604 cprev = cnow;
1605 }
1606 current->state = TASK_RUNNING;
1607 remove_wait_queue(&tiocmget->waitq, &wait);
1608
1609 return ret;
1610 }
1611
1612 /*
1613 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1614 * Return: write counters to the user passed counter struct
1615 * NB: both 1->0 and 0->1 transitions are counted except for
1616 * RI where only 0->1 is counted.
1617 */
1618 static int hso_get_count(struct tty_struct *tty,
1619 struct serial_icounter_struct *icount)
1620 {
1621 struct uart_icount cnow;
1622 struct hso_serial *serial = tty->driver_data;
1623 struct hso_tiocmget *tiocmget = serial->tiocmget;
1624
1625 memset(icount, 0, sizeof(struct serial_icounter_struct));
1626
1627 if (!tiocmget)
1628 return -ENOENT;
1629 spin_lock_irq(&serial->serial_lock);
1630 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1631 spin_unlock_irq(&serial->serial_lock);
1632
1633 icount->cts = cnow.cts;
1634 icount->dsr = cnow.dsr;
1635 icount->rng = cnow.rng;
1636 icount->dcd = cnow.dcd;
1637 icount->rx = cnow.rx;
1638 icount->tx = cnow.tx;
1639 icount->frame = cnow.frame;
1640 icount->overrun = cnow.overrun;
1641 icount->parity = cnow.parity;
1642 icount->brk = cnow.brk;
1643 icount->buf_overrun = cnow.buf_overrun;
1644
1645 return 0;
1646 }
1647
1648
1649 static int hso_serial_tiocmget(struct tty_struct *tty)
1650 {
1651 int retval;
1652 struct hso_serial *serial = tty->driver_data;
1653 struct hso_tiocmget *tiocmget;
1654 u16 UART_state_bitmap;
1655
1656 /* sanity check */
1657 if (!serial) {
1658 D1("no tty structures");
1659 return -EINVAL;
1660 }
1661 spin_lock_irq(&serial->serial_lock);
1662 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1663 ((serial->dtr_state) ? TIOCM_DTR : 0);
1664 tiocmget = serial->tiocmget;
1665 if (tiocmget) {
1666
1667 UART_state_bitmap = le16_to_cpu(
1668 tiocmget->prev_UART_state_bitmap);
1669 if (UART_state_bitmap & B_RING_SIGNAL)
1670 retval |= TIOCM_RNG;
1671 if (UART_state_bitmap & B_RX_CARRIER)
1672 retval |= TIOCM_CD;
1673 if (UART_state_bitmap & B_TX_CARRIER)
1674 retval |= TIOCM_DSR;
1675 }
1676 spin_unlock_irq(&serial->serial_lock);
1677 return retval;
1678 }
1679
1680 static int hso_serial_tiocmset(struct tty_struct *tty,
1681 unsigned int set, unsigned int clear)
1682 {
1683 int val = 0;
1684 unsigned long flags;
1685 int if_num;
1686 struct hso_serial *serial = tty->driver_data;
1687
1688 /* sanity check */
1689 if (!serial) {
1690 D1("no tty structures");
1691 return -EINVAL;
1692 }
1693
1694 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1695 return -EINVAL;
1696
1697 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1698
1699 spin_lock_irqsave(&serial->serial_lock, flags);
1700 if (set & TIOCM_RTS)
1701 serial->rts_state = 1;
1702 if (set & TIOCM_DTR)
1703 serial->dtr_state = 1;
1704
1705 if (clear & TIOCM_RTS)
1706 serial->rts_state = 0;
1707 if (clear & TIOCM_DTR)
1708 serial->dtr_state = 0;
1709
1710 if (serial->dtr_state)
1711 val |= 0x01;
1712 if (serial->rts_state)
1713 val |= 0x02;
1714
1715 spin_unlock_irqrestore(&serial->serial_lock, flags);
1716
1717 return usb_control_msg(serial->parent->usb,
1718 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1719 0x21, val, if_num, NULL, 0,
1720 USB_CTRL_SET_TIMEOUT);
1721 }
1722
1723 static int hso_serial_ioctl(struct tty_struct *tty,
1724 unsigned int cmd, unsigned long arg)
1725 {
1726 struct hso_serial *serial = tty->driver_data;
1727 int ret = 0;
1728 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1729
1730 if (!serial)
1731 return -ENODEV;
1732 switch (cmd) {
1733 case TIOCMIWAIT:
1734 ret = hso_wait_modem_status(serial, arg);
1735 break;
1736 default:
1737 ret = -ENOIOCTLCMD;
1738 break;
1739 }
1740 return ret;
1741 }
1742
1743
1744 /* starts a transmit */
1745 static void hso_kick_transmit(struct hso_serial *serial)
1746 {
1747 u8 *temp;
1748 unsigned long flags;
1749 int res;
1750
1751 spin_lock_irqsave(&serial->serial_lock, flags);
1752 if (!serial->tx_buffer_count)
1753 goto out;
1754
1755 if (serial->tx_urb_used)
1756 goto out;
1757
1758 /* Wakeup USB interface if necessary */
1759 if (hso_get_activity(serial->parent) == -EAGAIN)
1760 goto out;
1761
1762 /* Switch pointers around to avoid memcpy */
1763 temp = serial->tx_buffer;
1764 serial->tx_buffer = serial->tx_data;
1765 serial->tx_data = temp;
1766 serial->tx_data_count = serial->tx_buffer_count;
1767 serial->tx_buffer_count = 0;
1768
1769 /* If temp is set, it means we switched buffers */
1770 if (temp && serial->write_data) {
1771 res = serial->write_data(serial);
1772 if (res >= 0)
1773 serial->tx_urb_used = 1;
1774 }
1775 out:
1776 spin_unlock_irqrestore(&serial->serial_lock, flags);
1777 }
1778
1779 /* make a request (for reading and writing data to muxed serial port) */
1780 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1781 struct urb *ctrl_urb,
1782 struct usb_ctrlrequest *ctrl_req,
1783 u8 *ctrl_urb_data, u32 size)
1784 {
1785 int result;
1786 int pipe;
1787
1788 /* Sanity check */
1789 if (!serial || !ctrl_urb || !ctrl_req) {
1790 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1791 return -EINVAL;
1792 }
1793
1794 /* initialize */
1795 ctrl_req->wValue = 0;
1796 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1797 ctrl_req->wLength = cpu_to_le16(size);
1798
1799 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1800 /* Reading command */
1801 ctrl_req->bRequestType = USB_DIR_IN |
1802 USB_TYPE_OPTION_VENDOR |
1803 USB_RECIP_INTERFACE;
1804 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1805 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1806 } else {
1807 /* Writing command */
1808 ctrl_req->bRequestType = USB_DIR_OUT |
1809 USB_TYPE_OPTION_VENDOR |
1810 USB_RECIP_INTERFACE;
1811 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1812 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1813 }
1814 /* syslog */
1815 D2("%s command (%02x) len: %d, port: %d",
1816 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1817 ctrl_req->bRequestType, ctrl_req->wLength, port);
1818
1819 /* Load ctrl urb */
1820 ctrl_urb->transfer_flags = 0;
1821 usb_fill_control_urb(ctrl_urb,
1822 serial->parent->usb,
1823 pipe,
1824 (u8 *) ctrl_req,
1825 ctrl_urb_data, size, ctrl_callback, serial);
1826 /* Send it on merry way */
1827 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1828 if (result) {
1829 dev_err(&ctrl_urb->dev->dev,
1830 "%s failed submit ctrl_urb %d type %d\n", __func__,
1831 result, type);
1832 return result;
1833 }
1834
1835 /* done */
1836 return size;
1837 }
1838
1839 /* called by intr_callback when read occurs */
1840 static int hso_mux_serial_read(struct hso_serial *serial)
1841 {
1842 if (!serial)
1843 return -EINVAL;
1844
1845 /* clean data */
1846 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1847 /* make the request */
1848
1849 if (serial->num_rx_urbs != 1) {
1850 dev_err(&serial->parent->interface->dev,
1851 "ERROR: mux'd reads with multiple buffers "
1852 "not possible\n");
1853 return 0;
1854 }
1855 return mux_device_request(serial,
1856 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1857 serial->parent->port_spec & HSO_PORT_MASK,
1858 serial->rx_urb[0],
1859 &serial->ctrl_req_rx,
1860 serial->rx_data[0], serial->rx_data_length);
1861 }
1862
1863 /* used for muxed serial port callback (muxed serial read) */
1864 static void intr_callback(struct urb *urb)
1865 {
1866 struct hso_shared_int *shared_int = urb->context;
1867 struct hso_serial *serial;
1868 unsigned char *port_req;
1869 int status = urb->status;
1870 int i;
1871
1872 usb_mark_last_busy(urb->dev);
1873
1874 /* sanity check */
1875 if (!shared_int)
1876 return;
1877
1878 /* status check */
1879 if (status) {
1880 handle_usb_error(status, __func__, NULL);
1881 return;
1882 }
1883 D4("\n--- Got intr callback 0x%02X ---", status);
1884
1885 /* what request? */
1886 port_req = urb->transfer_buffer;
1887 D4(" port_req = 0x%.2X\n", *port_req);
1888 /* loop over all muxed ports to find the one sending this */
1889 for (i = 0; i < 8; i++) {
1890 /* max 8 channels on MUX */
1891 if (*port_req & (1 << i)) {
1892 serial = get_serial_by_shared_int_and_type(shared_int,
1893 (1 << i));
1894 if (serial != NULL) {
1895 D1("Pending read interrupt on port %d\n", i);
1896 spin_lock(&serial->serial_lock);
1897 if (serial->rx_state == RX_IDLE &&
1898 serial->port.count > 0) {
1899 /* Setup and send a ctrl req read on
1900 * port i */
1901 if (!serial->rx_urb_filled[0]) {
1902 serial->rx_state = RX_SENT;
1903 hso_mux_serial_read(serial);
1904 } else
1905 serial->rx_state = RX_PENDING;
1906 } else {
1907 D1("Already a read pending on "
1908 "port %d or port not open\n", i);
1909 }
1910 spin_unlock(&serial->serial_lock);
1911 }
1912 }
1913 }
1914 /* Resubmit interrupt urb */
1915 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1916 }
1917
1918 /* called for writing to muxed serial port */
1919 static int hso_mux_serial_write_data(struct hso_serial *serial)
1920 {
1921 if (NULL == serial)
1922 return -EINVAL;
1923
1924 return mux_device_request(serial,
1925 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1926 serial->parent->port_spec & HSO_PORT_MASK,
1927 serial->tx_urb,
1928 &serial->ctrl_req_tx,
1929 serial->tx_data, serial->tx_data_count);
1930 }
1931
1932 /* write callback for Diag and CS port */
1933 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1934 {
1935 struct hso_serial *serial = urb->context;
1936 int status = urb->status;
1937
1938 /* sanity check */
1939 if (!serial) {
1940 D1("serial == NULL");
1941 return;
1942 }
1943
1944 spin_lock(&serial->serial_lock);
1945 serial->tx_urb_used = 0;
1946 spin_unlock(&serial->serial_lock);
1947 if (status) {
1948 handle_usb_error(status, __func__, serial->parent);
1949 return;
1950 }
1951 hso_put_activity(serial->parent);
1952 tty_port_tty_wakeup(&serial->port);
1953 hso_kick_transmit(serial);
1954
1955 D1(" ");
1956 }
1957
1958 /* called for writing diag or CS serial port */
1959 static int hso_std_serial_write_data(struct hso_serial *serial)
1960 {
1961 int count = serial->tx_data_count;
1962 int result;
1963
1964 usb_fill_bulk_urb(serial->tx_urb,
1965 serial->parent->usb,
1966 usb_sndbulkpipe(serial->parent->usb,
1967 serial->out_endp->
1968 bEndpointAddress & 0x7F),
1969 serial->tx_data, serial->tx_data_count,
1970 hso_std_serial_write_bulk_callback, serial);
1971
1972 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1973 if (result) {
1974 dev_warn(&serial->parent->usb->dev,
1975 "Failed to submit urb - res %d\n", result);
1976 return result;
1977 }
1978
1979 return count;
1980 }
1981
1982 /* callback after read or write on muxed serial port */
1983 static void ctrl_callback(struct urb *urb)
1984 {
1985 struct hso_serial *serial = urb->context;
1986 struct usb_ctrlrequest *req;
1987 int status = urb->status;
1988
1989 /* sanity check */
1990 if (!serial)
1991 return;
1992
1993 spin_lock(&serial->serial_lock);
1994 serial->tx_urb_used = 0;
1995 spin_unlock(&serial->serial_lock);
1996 if (status) {
1997 handle_usb_error(status, __func__, serial->parent);
1998 return;
1999 }
2000
2001 /* what request? */
2002 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2003 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2004 D4("Actual length of urb = %d\n", urb->actual_length);
2005 DUMP1(urb->transfer_buffer, urb->actual_length);
2006
2007 if (req->bRequestType ==
2008 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2009 /* response to a read command */
2010 serial->rx_urb_filled[0] = 1;
2011 spin_lock(&serial->serial_lock);
2012 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2013 spin_unlock(&serial->serial_lock);
2014 } else {
2015 hso_put_activity(serial->parent);
2016 tty_port_tty_wakeup(&serial->port);
2017 /* response to a write command */
2018 hso_kick_transmit(serial);
2019 }
2020 }
2021
2022 /* handle RX data for serial port */
2023 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2024 {
2025 struct tty_struct *tty;
2026 int write_length_remaining = 0;
2027 int curr_write_len;
2028
2029 /* Sanity check */
2030 if (urb == NULL || serial == NULL) {
2031 D1("serial = NULL");
2032 return -2;
2033 }
2034
2035 tty = tty_port_tty_get(&serial->port);
2036
2037 /* Push data to tty */
2038 write_length_remaining = urb->actual_length -
2039 serial->curr_rx_urb_offset;
2040 D1("data to push to tty");
2041 while (write_length_remaining) {
2042 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2043 tty_kref_put(tty);
2044 return -1;
2045 }
2046 curr_write_len = tty_insert_flip_string(&serial->port,
2047 urb->transfer_buffer + serial->curr_rx_urb_offset,
2048 write_length_remaining);
2049 serial->curr_rx_urb_offset += curr_write_len;
2050 write_length_remaining -= curr_write_len;
2051 tty_flip_buffer_push(&serial->port);
2052 }
2053 tty_kref_put(tty);
2054
2055 if (write_length_remaining == 0) {
2056 serial->curr_rx_urb_offset = 0;
2057 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2058 }
2059 return write_length_remaining;
2060 }
2061
2062
2063 /* Base driver functions */
2064
2065 static void hso_log_port(struct hso_device *hso_dev)
2066 {
2067 char *port_type;
2068 char port_dev[20];
2069
2070 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2071 case HSO_PORT_CONTROL:
2072 port_type = "Control";
2073 break;
2074 case HSO_PORT_APP:
2075 port_type = "Application";
2076 break;
2077 case HSO_PORT_GPS:
2078 port_type = "GPS";
2079 break;
2080 case HSO_PORT_GPS_CONTROL:
2081 port_type = "GPS control";
2082 break;
2083 case HSO_PORT_APP2:
2084 port_type = "Application2";
2085 break;
2086 case HSO_PORT_PCSC:
2087 port_type = "PCSC";
2088 break;
2089 case HSO_PORT_DIAG:
2090 port_type = "Diagnostic";
2091 break;
2092 case HSO_PORT_DIAG2:
2093 port_type = "Diagnostic2";
2094 break;
2095 case HSO_PORT_MODEM:
2096 port_type = "Modem";
2097 break;
2098 case HSO_PORT_NETWORK:
2099 port_type = "Network";
2100 break;
2101 default:
2102 port_type = "Unknown";
2103 break;
2104 }
2105 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2106 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2107 } else
2108 sprintf(port_dev, "/dev/%s%d", tty_filename,
2109 dev2ser(hso_dev)->minor);
2110
2111 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2112 port_type, port_dev);
2113 }
2114
2115 static int hso_start_net_device(struct hso_device *hso_dev)
2116 {
2117 int i, result = 0;
2118 struct hso_net *hso_net = dev2net(hso_dev);
2119
2120 if (!hso_net)
2121 return -ENODEV;
2122
2123 /* send URBs for all read buffers */
2124 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2125
2126 /* Prep a receive URB */
2127 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2128 hso_dev->usb,
2129 usb_rcvbulkpipe(hso_dev->usb,
2130 hso_net->in_endp->
2131 bEndpointAddress & 0x7F),
2132 hso_net->mux_bulk_rx_buf_pool[i],
2133 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2134 hso_net);
2135
2136 /* Put it out there so the device can send us stuff */
2137 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2138 GFP_NOIO);
2139 if (result)
2140 dev_warn(&hso_dev->usb->dev,
2141 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2142 i, result);
2143 }
2144
2145 return result;
2146 }
2147
2148 static int hso_stop_net_device(struct hso_device *hso_dev)
2149 {
2150 int i;
2151 struct hso_net *hso_net = dev2net(hso_dev);
2152
2153 if (!hso_net)
2154 return -ENODEV;
2155
2156 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2157 if (hso_net->mux_bulk_rx_urb_pool[i])
2158 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2159
2160 }
2161 if (hso_net->mux_bulk_tx_urb)
2162 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2163
2164 return 0;
2165 }
2166
2167 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2168 {
2169 int i, result = 0;
2170 struct hso_serial *serial = dev2ser(hso_dev);
2171
2172 if (!serial)
2173 return -ENODEV;
2174
2175 /* If it is not the MUX port fill in and submit a bulk urb (already
2176 * allocated in hso_serial_start) */
2177 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2178 for (i = 0; i < serial->num_rx_urbs; i++) {
2179 usb_fill_bulk_urb(serial->rx_urb[i],
2180 serial->parent->usb,
2181 usb_rcvbulkpipe(serial->parent->usb,
2182 serial->in_endp->
2183 bEndpointAddress &
2184 0x7F),
2185 serial->rx_data[i],
2186 serial->rx_data_length,
2187 hso_std_serial_read_bulk_callback,
2188 serial);
2189 result = usb_submit_urb(serial->rx_urb[i], flags);
2190 if (result) {
2191 dev_warn(&serial->parent->usb->dev,
2192 "Failed to submit urb - res %d\n",
2193 result);
2194 break;
2195 }
2196 }
2197 } else {
2198 mutex_lock(&serial->shared_int->shared_int_lock);
2199 if (!serial->shared_int->use_count) {
2200 result =
2201 hso_mux_submit_intr_urb(serial->shared_int,
2202 hso_dev->usb, flags);
2203 }
2204 serial->shared_int->use_count++;
2205 mutex_unlock(&serial->shared_int->shared_int_lock);
2206 }
2207 if (serial->tiocmget)
2208 tiocmget_submit_urb(serial,
2209 serial->tiocmget,
2210 serial->parent->usb);
2211 return result;
2212 }
2213
2214 static int hso_stop_serial_device(struct hso_device *hso_dev)
2215 {
2216 int i;
2217 struct hso_serial *serial = dev2ser(hso_dev);
2218 struct hso_tiocmget *tiocmget;
2219
2220 if (!serial)
2221 return -ENODEV;
2222
2223 for (i = 0; i < serial->num_rx_urbs; i++) {
2224 if (serial->rx_urb[i]) {
2225 usb_kill_urb(serial->rx_urb[i]);
2226 serial->rx_urb_filled[i] = 0;
2227 }
2228 }
2229 serial->curr_rx_urb_idx = 0;
2230 serial->curr_rx_urb_offset = 0;
2231
2232 if (serial->tx_urb)
2233 usb_kill_urb(serial->tx_urb);
2234
2235 if (serial->shared_int) {
2236 mutex_lock(&serial->shared_int->shared_int_lock);
2237 if (serial->shared_int->use_count &&
2238 (--serial->shared_int->use_count == 0)) {
2239 struct urb *urb;
2240
2241 urb = serial->shared_int->shared_intr_urb;
2242 if (urb)
2243 usb_kill_urb(urb);
2244 }
2245 mutex_unlock(&serial->shared_int->shared_int_lock);
2246 }
2247 tiocmget = serial->tiocmget;
2248 if (tiocmget) {
2249 wake_up_interruptible(&tiocmget->waitq);
2250 usb_kill_urb(tiocmget->urb);
2251 }
2252
2253 return 0;
2254 }
2255
2256 static void hso_serial_common_free(struct hso_serial *serial)
2257 {
2258 int i;
2259
2260 if (serial->parent->dev)
2261 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2262
2263 tty_unregister_device(tty_drv, serial->minor);
2264
2265 for (i = 0; i < serial->num_rx_urbs; i++) {
2266 /* unlink and free RX URB */
2267 usb_free_urb(serial->rx_urb[i]);
2268 /* free the RX buffer */
2269 kfree(serial->rx_data[i]);
2270 }
2271
2272 /* unlink and free TX URB */
2273 usb_free_urb(serial->tx_urb);
2274 kfree(serial->tx_data);
2275 tty_port_destroy(&serial->port);
2276 }
2277
2278 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2279 int rx_size, int tx_size)
2280 {
2281 struct device *dev;
2282 int minor;
2283 int i;
2284
2285 tty_port_init(&serial->port);
2286
2287 minor = get_free_serial_index();
2288 if (minor < 0)
2289 goto exit;
2290
2291 /* register our minor number */
2292 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2293 minor, &serial->parent->interface->dev);
2294 dev = serial->parent->dev;
2295 dev_set_drvdata(dev, serial->parent);
2296 i = device_create_file(dev, &dev_attr_hsotype);
2297
2298 /* fill in specific data for later use */
2299 serial->minor = minor;
2300 serial->magic = HSO_SERIAL_MAGIC;
2301 spin_lock_init(&serial->serial_lock);
2302 serial->num_rx_urbs = num_urbs;
2303
2304 /* RX, allocate urb and initialize */
2305
2306 /* prepare our RX buffer */
2307 serial->rx_data_length = rx_size;
2308 for (i = 0; i < serial->num_rx_urbs; i++) {
2309 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2310 if (!serial->rx_urb[i]) {
2311 dev_err(dev, "Could not allocate urb?\n");
2312 goto exit;
2313 }
2314 serial->rx_urb[i]->transfer_buffer = NULL;
2315 serial->rx_urb[i]->transfer_buffer_length = 0;
2316 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2317 GFP_KERNEL);
2318 if (!serial->rx_data[i])
2319 goto exit;
2320 }
2321
2322 /* TX, allocate urb and initialize */
2323 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2324 if (!serial->tx_urb) {
2325 dev_err(dev, "Could not allocate urb?\n");
2326 goto exit;
2327 }
2328 serial->tx_urb->transfer_buffer = NULL;
2329 serial->tx_urb->transfer_buffer_length = 0;
2330 /* prepare our TX buffer */
2331 serial->tx_data_count = 0;
2332 serial->tx_buffer_count = 0;
2333 serial->tx_data_length = tx_size;
2334 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2335 if (!serial->tx_data)
2336 goto exit;
2337
2338 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339 if (!serial->tx_buffer)
2340 goto exit;
2341
2342 return 0;
2343 exit:
2344 hso_serial_common_free(serial);
2345 return -1;
2346 }
2347
2348 /* Creates a general hso device */
2349 static struct hso_device *hso_create_device(struct usb_interface *intf,
2350 int port_spec)
2351 {
2352 struct hso_device *hso_dev;
2353
2354 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2355 if (!hso_dev)
2356 return NULL;
2357
2358 hso_dev->port_spec = port_spec;
2359 hso_dev->usb = interface_to_usbdev(intf);
2360 hso_dev->interface = intf;
2361 kref_init(&hso_dev->ref);
2362 mutex_init(&hso_dev->mutex);
2363
2364 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2365 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2366 INIT_WORK(&hso_dev->reset_device, reset_device);
2367
2368 return hso_dev;
2369 }
2370
2371 /* Removes a network device in the network device table */
2372 static int remove_net_device(struct hso_device *hso_dev)
2373 {
2374 int i;
2375
2376 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2377 if (network_table[i] == hso_dev) {
2378 network_table[i] = NULL;
2379 break;
2380 }
2381 }
2382 if (i == HSO_MAX_NET_DEVICES)
2383 return -1;
2384 return 0;
2385 }
2386
2387 /* Frees our network device */
2388 static void hso_free_net_device(struct hso_device *hso_dev)
2389 {
2390 int i;
2391 struct hso_net *hso_net = dev2net(hso_dev);
2392
2393 if (!hso_net)
2394 return;
2395
2396 remove_net_device(hso_net->parent);
2397
2398 if (hso_net->net)
2399 unregister_netdev(hso_net->net);
2400
2401 /* start freeing */
2402 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2403 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2404 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2405 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2406 }
2407 usb_free_urb(hso_net->mux_bulk_tx_urb);
2408 kfree(hso_net->mux_bulk_tx_buf);
2409 hso_net->mux_bulk_tx_buf = NULL;
2410
2411 if (hso_net->net)
2412 free_netdev(hso_net->net);
2413
2414 kfree(hso_dev);
2415 }
2416
2417 static const struct net_device_ops hso_netdev_ops = {
2418 .ndo_open = hso_net_open,
2419 .ndo_stop = hso_net_close,
2420 .ndo_start_xmit = hso_net_start_xmit,
2421 .ndo_tx_timeout = hso_net_tx_timeout,
2422 };
2423
2424 /* initialize the network interface */
2425 static void hso_net_init(struct net_device *net)
2426 {
2427 struct hso_net *hso_net = netdev_priv(net);
2428
2429 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2430
2431 /* fill in the other fields */
2432 net->netdev_ops = &hso_netdev_ops;
2433 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2434 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2435 net->type = ARPHRD_NONE;
2436 net->mtu = DEFAULT_MTU - 14;
2437 net->tx_queue_len = 10;
2438 SET_ETHTOOL_OPS(net, &ops);
2439
2440 /* and initialize the semaphore */
2441 spin_lock_init(&hso_net->net_lock);
2442 }
2443
2444 /* Adds a network device in the network device table */
2445 static int add_net_device(struct hso_device *hso_dev)
2446 {
2447 int i;
2448
2449 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2450 if (network_table[i] == NULL) {
2451 network_table[i] = hso_dev;
2452 break;
2453 }
2454 }
2455 if (i == HSO_MAX_NET_DEVICES)
2456 return -1;
2457 return 0;
2458 }
2459
2460 static int hso_rfkill_set_block(void *data, bool blocked)
2461 {
2462 struct hso_device *hso_dev = data;
2463 int enabled = !blocked;
2464 int rv;
2465
2466 mutex_lock(&hso_dev->mutex);
2467 if (hso_dev->usb_gone)
2468 rv = 0;
2469 else
2470 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2471 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2472 USB_CTRL_SET_TIMEOUT);
2473 mutex_unlock(&hso_dev->mutex);
2474 return rv;
2475 }
2476
2477 static const struct rfkill_ops hso_rfkill_ops = {
2478 .set_block = hso_rfkill_set_block,
2479 };
2480
2481 /* Creates and sets up everything for rfkill */
2482 static void hso_create_rfkill(struct hso_device *hso_dev,
2483 struct usb_interface *interface)
2484 {
2485 struct hso_net *hso_net = dev2net(hso_dev);
2486 struct device *dev = &hso_net->net->dev;
2487 char *rfkn;
2488
2489 rfkn = kzalloc(20, GFP_KERNEL);
2490 if (!rfkn)
2491 dev_err(dev, "%s - Out of memory\n", __func__);
2492
2493 snprintf(rfkn, 20, "hso-%d",
2494 interface->altsetting->desc.bInterfaceNumber);
2495
2496 hso_net->rfkill = rfkill_alloc(rfkn,
2497 &interface_to_usbdev(interface)->dev,
2498 RFKILL_TYPE_WWAN,
2499 &hso_rfkill_ops, hso_dev);
2500 if (!hso_net->rfkill) {
2501 dev_err(dev, "%s - Out of memory\n", __func__);
2502 kfree(rfkn);
2503 return;
2504 }
2505 if (rfkill_register(hso_net->rfkill) < 0) {
2506 rfkill_destroy(hso_net->rfkill);
2507 kfree(rfkn);
2508 hso_net->rfkill = NULL;
2509 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2510 return;
2511 }
2512 }
2513
2514 static struct device_type hso_type = {
2515 .name = "wwan",
2516 };
2517
2518 /* Creates our network device */
2519 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2520 int port_spec)
2521 {
2522 int result, i;
2523 struct net_device *net;
2524 struct hso_net *hso_net;
2525 struct hso_device *hso_dev;
2526
2527 hso_dev = hso_create_device(interface, port_spec);
2528 if (!hso_dev)
2529 return NULL;
2530
2531 /* allocate our network device, then we can put in our private data */
2532 /* call hso_net_init to do the basic initialization */
2533 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2534 if (!net) {
2535 dev_err(&interface->dev, "Unable to create ethernet device\n");
2536 goto exit;
2537 }
2538
2539 hso_net = netdev_priv(net);
2540
2541 hso_dev->port_data.dev_net = hso_net;
2542 hso_net->net = net;
2543 hso_net->parent = hso_dev;
2544
2545 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2546 USB_DIR_IN);
2547 if (!hso_net->in_endp) {
2548 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2549 goto exit;
2550 }
2551 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2552 USB_DIR_OUT);
2553 if (!hso_net->out_endp) {
2554 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2555 goto exit;
2556 }
2557 SET_NETDEV_DEV(net, &interface->dev);
2558 SET_NETDEV_DEVTYPE(net, &hso_type);
2559
2560 /* registering our net device */
2561 result = register_netdev(net);
2562 if (result) {
2563 dev_err(&interface->dev, "Failed to register device\n");
2564 goto exit;
2565 }
2566
2567 /* start allocating */
2568 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2569 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2570 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2571 dev_err(&interface->dev, "Could not allocate rx urb\n");
2572 goto exit;
2573 }
2574 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2575 GFP_KERNEL);
2576 if (!hso_net->mux_bulk_rx_buf_pool[i])
2577 goto exit;
2578 }
2579 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2580 if (!hso_net->mux_bulk_tx_urb) {
2581 dev_err(&interface->dev, "Could not allocate tx urb\n");
2582 goto exit;
2583 }
2584 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2585 if (!hso_net->mux_bulk_tx_buf)
2586 goto exit;
2587
2588 add_net_device(hso_dev);
2589
2590 hso_log_port(hso_dev);
2591
2592 hso_create_rfkill(hso_dev, interface);
2593
2594 return hso_dev;
2595 exit:
2596 hso_free_net_device(hso_dev);
2597 return NULL;
2598 }
2599
2600 static void hso_free_tiomget(struct hso_serial *serial)
2601 {
2602 struct hso_tiocmget *tiocmget;
2603 if (!serial)
2604 return;
2605 tiocmget = serial->tiocmget;
2606 if (tiocmget) {
2607 usb_free_urb(tiocmget->urb);
2608 tiocmget->urb = NULL;
2609 serial->tiocmget = NULL;
2610 kfree(tiocmget);
2611 }
2612 }
2613
2614 /* Frees an AT channel ( goes for both mux and non-mux ) */
2615 static void hso_free_serial_device(struct hso_device *hso_dev)
2616 {
2617 struct hso_serial *serial = dev2ser(hso_dev);
2618
2619 if (!serial)
2620 return;
2621 set_serial_by_index(serial->minor, NULL);
2622
2623 hso_serial_common_free(serial);
2624
2625 if (serial->shared_int) {
2626 mutex_lock(&serial->shared_int->shared_int_lock);
2627 if (--serial->shared_int->ref_count == 0)
2628 hso_free_shared_int(serial->shared_int);
2629 else
2630 mutex_unlock(&serial->shared_int->shared_int_lock);
2631 }
2632 hso_free_tiomget(serial);
2633 kfree(serial);
2634 kfree(hso_dev);
2635 }
2636
2637 /* Creates a bulk AT channel */
2638 static struct hso_device *hso_create_bulk_serial_device(
2639 struct usb_interface *interface, int port)
2640 {
2641 struct hso_device *hso_dev;
2642 struct hso_serial *serial;
2643 int num_urbs;
2644 struct hso_tiocmget *tiocmget;
2645
2646 hso_dev = hso_create_device(interface, port);
2647 if (!hso_dev)
2648 return NULL;
2649
2650 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2651 if (!serial)
2652 goto exit;
2653
2654 serial->parent = hso_dev;
2655 hso_dev->port_data.dev_serial = serial;
2656
2657 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2658 num_urbs = 2;
2659 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2660 GFP_KERNEL);
2661 /* it isn't going to break our heart if serial->tiocmget
2662 * allocation fails don't bother checking this.
2663 */
2664 if (serial->tiocmget) {
2665 tiocmget = serial->tiocmget;
2666 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2667 if (tiocmget->urb) {
2668 mutex_init(&tiocmget->mutex);
2669 init_waitqueue_head(&tiocmget->waitq);
2670 tiocmget->endp = hso_get_ep(
2671 interface,
2672 USB_ENDPOINT_XFER_INT,
2673 USB_DIR_IN);
2674 } else
2675 hso_free_tiomget(serial);
2676 }
2677 }
2678 else
2679 num_urbs = 1;
2680
2681 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2682 BULK_URB_TX_SIZE))
2683 goto exit;
2684
2685 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2686 USB_DIR_IN);
2687 if (!serial->in_endp) {
2688 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2689 goto exit2;
2690 }
2691
2692 if (!
2693 (serial->out_endp =
2694 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2695 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2696 goto exit2;
2697 }
2698
2699 serial->write_data = hso_std_serial_write_data;
2700
2701 /* and record this serial */
2702 set_serial_by_index(serial->minor, serial);
2703
2704 /* setup the proc dirs and files if needed */
2705 hso_log_port(hso_dev);
2706
2707 /* done, return it */
2708 return hso_dev;
2709
2710 exit2:
2711 hso_serial_common_free(serial);
2712 exit:
2713 hso_free_tiomget(serial);
2714 kfree(serial);
2715 kfree(hso_dev);
2716 return NULL;
2717 }
2718
2719 /* Creates a multiplexed AT channel */
2720 static
2721 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2722 int port,
2723 struct hso_shared_int *mux)
2724 {
2725 struct hso_device *hso_dev;
2726 struct hso_serial *serial;
2727 int port_spec;
2728
2729 port_spec = HSO_INTF_MUX;
2730 port_spec &= ~HSO_PORT_MASK;
2731
2732 port_spec |= hso_mux_to_port(port);
2733 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2734 return NULL;
2735
2736 hso_dev = hso_create_device(interface, port_spec);
2737 if (!hso_dev)
2738 return NULL;
2739
2740 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2741 if (!serial)
2742 goto exit;
2743
2744 hso_dev->port_data.dev_serial = serial;
2745 serial->parent = hso_dev;
2746
2747 if (hso_serial_common_create
2748 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2749 goto exit;
2750
2751 serial->tx_data_length--;
2752 serial->write_data = hso_mux_serial_write_data;
2753
2754 serial->shared_int = mux;
2755 mutex_lock(&serial->shared_int->shared_int_lock);
2756 serial->shared_int->ref_count++;
2757 mutex_unlock(&serial->shared_int->shared_int_lock);
2758
2759 /* and record this serial */
2760 set_serial_by_index(serial->minor, serial);
2761
2762 /* setup the proc dirs and files if needed */
2763 hso_log_port(hso_dev);
2764
2765 /* done, return it */
2766 return hso_dev;
2767
2768 exit:
2769 if (serial) {
2770 tty_unregister_device(tty_drv, serial->minor);
2771 kfree(serial);
2772 }
2773 if (hso_dev)
2774 kfree(hso_dev);
2775 return NULL;
2776
2777 }
2778
2779 static void hso_free_shared_int(struct hso_shared_int *mux)
2780 {
2781 usb_free_urb(mux->shared_intr_urb);
2782 kfree(mux->shared_intr_buf);
2783 mutex_unlock(&mux->shared_int_lock);
2784 kfree(mux);
2785 }
2786
2787 static
2788 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2789 {
2790 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2791
2792 if (!mux)
2793 return NULL;
2794
2795 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2796 USB_DIR_IN);
2797 if (!mux->intr_endp) {
2798 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2799 goto exit;
2800 }
2801
2802 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2803 if (!mux->shared_intr_urb) {
2804 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2805 goto exit;
2806 }
2807 mux->shared_intr_buf =
2808 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2809 GFP_KERNEL);
2810 if (!mux->shared_intr_buf)
2811 goto exit;
2812
2813 mutex_init(&mux->shared_int_lock);
2814
2815 return mux;
2816
2817 exit:
2818 kfree(mux->shared_intr_buf);
2819 usb_free_urb(mux->shared_intr_urb);
2820 kfree(mux);
2821 return NULL;
2822 }
2823
2824 /* Gets the port spec for a certain interface */
2825 static int hso_get_config_data(struct usb_interface *interface)
2826 {
2827 struct usb_device *usbdev = interface_to_usbdev(interface);
2828 u8 *config_data = kmalloc(17, GFP_KERNEL);
2829 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2830 s32 result;
2831
2832 if (!config_data)
2833 return -ENOMEM;
2834 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2835 0x86, 0xC0, 0, 0, config_data, 17,
2836 USB_CTRL_SET_TIMEOUT) != 0x11) {
2837 kfree(config_data);
2838 return -EIO;
2839 }
2840
2841 switch (config_data[if_num]) {
2842 case 0x0:
2843 result = 0;
2844 break;
2845 case 0x1:
2846 result = HSO_PORT_DIAG;
2847 break;
2848 case 0x2:
2849 result = HSO_PORT_GPS;
2850 break;
2851 case 0x3:
2852 result = HSO_PORT_GPS_CONTROL;
2853 break;
2854 case 0x4:
2855 result = HSO_PORT_APP;
2856 break;
2857 case 0x5:
2858 result = HSO_PORT_APP2;
2859 break;
2860 case 0x6:
2861 result = HSO_PORT_CONTROL;
2862 break;
2863 case 0x7:
2864 result = HSO_PORT_NETWORK;
2865 break;
2866 case 0x8:
2867 result = HSO_PORT_MODEM;
2868 break;
2869 case 0x9:
2870 result = HSO_PORT_MSD;
2871 break;
2872 case 0xa:
2873 result = HSO_PORT_PCSC;
2874 break;
2875 case 0xb:
2876 result = HSO_PORT_VOICE;
2877 break;
2878 default:
2879 result = 0;
2880 }
2881
2882 if (result)
2883 result |= HSO_INTF_BULK;
2884
2885 if (config_data[16] & 0x1)
2886 result |= HSO_INFO_CRC_BUG;
2887
2888 kfree(config_data);
2889 return result;
2890 }
2891
2892 /* called once for each interface upon device insertion */
2893 static int hso_probe(struct usb_interface *interface,
2894 const struct usb_device_id *id)
2895 {
2896 int mux, i, if_num, port_spec;
2897 unsigned char port_mask;
2898 struct hso_device *hso_dev = NULL;
2899 struct hso_shared_int *shared_int;
2900 struct hso_device *tmp_dev = NULL;
2901
2902 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2903 dev_err(&interface->dev, "Not our interface\n");
2904 return -ENODEV;
2905 }
2906
2907 if_num = interface->altsetting->desc.bInterfaceNumber;
2908
2909 /* Get the interface/port specification from either driver_info or from
2910 * the device itself */
2911 if (id->driver_info)
2912 port_spec = ((u32 *)(id->driver_info))[if_num];
2913 else
2914 port_spec = hso_get_config_data(interface);
2915
2916 /* Check if we need to switch to alt interfaces prior to port
2917 * configuration */
2918 if (interface->num_altsetting > 1)
2919 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2920 interface->needs_remote_wakeup = 1;
2921
2922 /* Allocate new hso device(s) */
2923 switch (port_spec & HSO_INTF_MASK) {
2924 case HSO_INTF_MUX:
2925 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2926 /* Create the network device */
2927 if (!disable_net) {
2928 hso_dev = hso_create_net_device(interface,
2929 port_spec);
2930 if (!hso_dev)
2931 goto exit;
2932 tmp_dev = hso_dev;
2933 }
2934 }
2935
2936 if (hso_get_mux_ports(interface, &port_mask))
2937 /* TODO: de-allocate everything */
2938 goto exit;
2939
2940 shared_int = hso_create_shared_int(interface);
2941 if (!shared_int)
2942 goto exit;
2943
2944 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2945 if (port_mask & i) {
2946 hso_dev = hso_create_mux_serial_device(
2947 interface, i, shared_int);
2948 if (!hso_dev)
2949 goto exit;
2950 }
2951 }
2952
2953 if (tmp_dev)
2954 hso_dev = tmp_dev;
2955 break;
2956
2957 case HSO_INTF_BULK:
2958 /* It's a regular bulk interface */
2959 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2960 if (!disable_net)
2961 hso_dev =
2962 hso_create_net_device(interface, port_spec);
2963 } else {
2964 hso_dev =
2965 hso_create_bulk_serial_device(interface, port_spec);
2966 }
2967 if (!hso_dev)
2968 goto exit;
2969 break;
2970 default:
2971 goto exit;
2972 }
2973
2974 /* save our data pointer in this device */
2975 usb_set_intfdata(interface, hso_dev);
2976
2977 /* done */
2978 return 0;
2979 exit:
2980 hso_free_interface(interface);
2981 return -ENODEV;
2982 }
2983
2984 /* device removed, cleaning up */
2985 static void hso_disconnect(struct usb_interface *interface)
2986 {
2987 hso_free_interface(interface);
2988
2989 /* remove reference of our private data */
2990 usb_set_intfdata(interface, NULL);
2991 }
2992
2993 static void async_get_intf(struct work_struct *data)
2994 {
2995 struct hso_device *hso_dev =
2996 container_of(data, struct hso_device, async_get_intf);
2997 usb_autopm_get_interface(hso_dev->interface);
2998 }
2999
3000 static void async_put_intf(struct work_struct *data)
3001 {
3002 struct hso_device *hso_dev =
3003 container_of(data, struct hso_device, async_put_intf);
3004 usb_autopm_put_interface(hso_dev->interface);
3005 }
3006
3007 static int hso_get_activity(struct hso_device *hso_dev)
3008 {
3009 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3010 if (!hso_dev->is_active) {
3011 hso_dev->is_active = 1;
3012 schedule_work(&hso_dev->async_get_intf);
3013 }
3014 }
3015
3016 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3017 return -EAGAIN;
3018
3019 usb_mark_last_busy(hso_dev->usb);
3020
3021 return 0;
3022 }
3023
3024 static int hso_put_activity(struct hso_device *hso_dev)
3025 {
3026 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3027 if (hso_dev->is_active) {
3028 hso_dev->is_active = 0;
3029 schedule_work(&hso_dev->async_put_intf);
3030 return -EAGAIN;
3031 }
3032 }
3033 hso_dev->is_active = 0;
3034 return 0;
3035 }
3036
3037 /* called by kernel when we need to suspend device */
3038 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3039 {
3040 int i, result;
3041
3042 /* Stop all serial ports */
3043 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3044 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3045 result = hso_stop_serial_device(serial_table[i]);
3046 if (result)
3047 goto out;
3048 }
3049 }
3050
3051 /* Stop all network ports */
3052 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3053 if (network_table[i] &&
3054 (network_table[i]->interface == iface)) {
3055 result = hso_stop_net_device(network_table[i]);
3056 if (result)
3057 goto out;
3058 }
3059 }
3060
3061 out:
3062 return 0;
3063 }
3064
3065 /* called by kernel when we need to resume device */
3066 static int hso_resume(struct usb_interface *iface)
3067 {
3068 int i, result = 0;
3069 struct hso_net *hso_net;
3070
3071 /* Start all serial ports */
3072 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3073 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3074 if (dev2ser(serial_table[i])->port.count) {
3075 result =
3076 hso_start_serial_device(serial_table[i], GFP_NOIO);
3077 hso_kick_transmit(dev2ser(serial_table[i]));
3078 if (result)
3079 goto out;
3080 }
3081 }
3082 }
3083
3084 /* Start all network ports */
3085 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3086 if (network_table[i] &&
3087 (network_table[i]->interface == iface)) {
3088 hso_net = dev2net(network_table[i]);
3089 if (hso_net->flags & IFF_UP) {
3090 /* First transmit any lingering data,
3091 then restart the device. */
3092 if (hso_net->skb_tx_buf) {
3093 dev_dbg(&iface->dev,
3094 "Transmitting"
3095 " lingering data\n");
3096 hso_net_start_xmit(hso_net->skb_tx_buf,
3097 hso_net->net);
3098 hso_net->skb_tx_buf = NULL;
3099 }
3100 result = hso_start_net_device(network_table[i]);
3101 if (result)
3102 goto out;
3103 }
3104 }
3105 }
3106
3107 out:
3108 return result;
3109 }
3110
3111 static void reset_device(struct work_struct *data)
3112 {
3113 struct hso_device *hso_dev =
3114 container_of(data, struct hso_device, reset_device);
3115 struct usb_device *usb = hso_dev->usb;
3116 int result;
3117
3118 if (hso_dev->usb_gone) {
3119 D1("No reset during disconnect\n");
3120 } else {
3121 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3122 if (result < 0)
3123 D1("unable to lock device for reset: %d\n", result);
3124 else {
3125 usb_reset_device(usb);
3126 usb_unlock_device(usb);
3127 }
3128 }
3129 }
3130
3131 static void hso_serial_ref_free(struct kref *ref)
3132 {
3133 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3134
3135 hso_free_serial_device(hso_dev);
3136 }
3137
3138 static void hso_free_interface(struct usb_interface *interface)
3139 {
3140 struct hso_serial *hso_dev;
3141 int i;
3142
3143 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3144 if (serial_table[i] &&
3145 (serial_table[i]->interface == interface)) {
3146 hso_dev = dev2ser(serial_table[i]);
3147 tty_port_tty_hangup(&hso_dev->port, false);
3148 mutex_lock(&hso_dev->parent->mutex);
3149 hso_dev->parent->usb_gone = 1;
3150 mutex_unlock(&hso_dev->parent->mutex);
3151 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3152 }
3153 }
3154
3155 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3156 if (network_table[i] &&
3157 (network_table[i]->interface == interface)) {
3158 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3159 /* hso_stop_net_device doesn't stop the net queue since
3160 * traffic needs to start it again when suspended */
3161 netif_stop_queue(dev2net(network_table[i])->net);
3162 hso_stop_net_device(network_table[i]);
3163 cancel_work_sync(&network_table[i]->async_put_intf);
3164 cancel_work_sync(&network_table[i]->async_get_intf);
3165 if (rfk) {
3166 rfkill_unregister(rfk);
3167 rfkill_destroy(rfk);
3168 }
3169 hso_free_net_device(network_table[i]);
3170 }
3171 }
3172 }
3173
3174 /* Helper functions */
3175
3176 /* Get the endpoint ! */
3177 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3178 int type, int dir)
3179 {
3180 int i;
3181 struct usb_host_interface *iface = intf->cur_altsetting;
3182 struct usb_endpoint_descriptor *endp;
3183
3184 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3185 endp = &iface->endpoint[i].desc;
3186 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3187 (usb_endpoint_type(endp) == type))
3188 return endp;
3189 }
3190
3191 return NULL;
3192 }
3193
3194 /* Get the byte that describes which ports are enabled */
3195 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3196 {
3197 int i;
3198 struct usb_host_interface *iface = intf->cur_altsetting;
3199
3200 if (iface->extralen == 3) {
3201 *ports = iface->extra[2];
3202 return 0;
3203 }
3204
3205 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3206 if (iface->endpoint[i].extralen == 3) {
3207 *ports = iface->endpoint[i].extra[2];
3208 return 0;
3209 }
3210 }
3211
3212 return -1;
3213 }
3214
3215 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3216 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3217 struct usb_device *usb, gfp_t gfp)
3218 {
3219 int result;
3220
3221 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3222 usb_rcvintpipe(usb,
3223 shared_int->intr_endp->bEndpointAddress & 0x7F),
3224 shared_int->shared_intr_buf,
3225 1,
3226 intr_callback, shared_int,
3227 shared_int->intr_endp->bInterval);
3228
3229 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3230 if (result)
3231 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3232 result);
3233
3234 return result;
3235 }
3236
3237 /* operations setup of the serial interface */
3238 static const struct tty_operations hso_serial_ops = {
3239 .open = hso_serial_open,
3240 .close = hso_serial_close,
3241 .write = hso_serial_write,
3242 .write_room = hso_serial_write_room,
3243 .ioctl = hso_serial_ioctl,
3244 .set_termios = hso_serial_set_termios,
3245 .chars_in_buffer = hso_serial_chars_in_buffer,
3246 .tiocmget = hso_serial_tiocmget,
3247 .tiocmset = hso_serial_tiocmset,
3248 .get_icount = hso_get_count,
3249 .unthrottle = hso_unthrottle
3250 };
3251
3252 static struct usb_driver hso_driver = {
3253 .name = driver_name,
3254 .probe = hso_probe,
3255 .disconnect = hso_disconnect,
3256 .id_table = hso_ids,
3257 .suspend = hso_suspend,
3258 .resume = hso_resume,
3259 .reset_resume = hso_resume,
3260 .supports_autosuspend = 1,
3261 .disable_hub_initiated_lpm = 1,
3262 };
3263
3264 static int __init hso_init(void)
3265 {
3266 int i;
3267 int result;
3268
3269 /* put it in the log */
3270 printk(KERN_INFO "hso: %s\n", version);
3271
3272 /* Initialise the serial table semaphore and table */
3273 spin_lock_init(&serial_table_lock);
3274 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3275 serial_table[i] = NULL;
3276
3277 /* allocate our driver using the proper amount of supported minors */
3278 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3279 if (!tty_drv)
3280 return -ENOMEM;
3281
3282 /* fill in all needed values */
3283 tty_drv->driver_name = driver_name;
3284 tty_drv->name = tty_filename;
3285
3286 /* if major number is provided as parameter, use that one */
3287 if (tty_major)
3288 tty_drv->major = tty_major;
3289
3290 tty_drv->minor_start = 0;
3291 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3292 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3293 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3294 tty_drv->init_termios = tty_std_termios;
3295 hso_init_termios(&tty_drv->init_termios);
3296 tty_set_operations(tty_drv, &hso_serial_ops);
3297
3298 /* register the tty driver */
3299 result = tty_register_driver(tty_drv);
3300 if (result) {
3301 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3302 __func__, result);
3303 goto err_free_tty;
3304 }
3305
3306 /* register this module as an usb driver */
3307 result = usb_register(&hso_driver);
3308 if (result) {
3309 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3310 result);
3311 goto err_unreg_tty;
3312 }
3313
3314 /* done */
3315 return 0;
3316 err_unreg_tty:
3317 tty_unregister_driver(tty_drv);
3318 err_free_tty:
3319 put_tty_driver(tty_drv);
3320 return result;
3321 }
3322
3323 static void __exit hso_exit(void)
3324 {
3325 printk(KERN_INFO "hso: unloaded\n");
3326
3327 tty_unregister_driver(tty_drv);
3328 put_tty_driver(tty_drv);
3329 /* deregister the usb driver */
3330 usb_deregister(&hso_driver);
3331 }
3332
3333 /* Module definitions */
3334 module_init(hso_init);
3335 module_exit(hso_exit);
3336
3337 MODULE_AUTHOR(MOD_AUTHOR);
3338 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3339 MODULE_LICENSE(MOD_LICENSE);
3340
3341 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3342 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3343 module_param(debug, int, S_IRUGO | S_IWUSR);
3344
3345 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3346 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3347 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3348
3349 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3350 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3351 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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