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[mirror_ubuntu-artful-kernel.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
54
55 #include <linux/sched/signal.h>
56 #include <linux/slab.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/netdevice.h>
60 #include <linux/module.h>
61 #include <linux/ethtool.h>
62 #include <linux/usb.h>
63 #include <linux/tty.h>
64 #include <linux/tty_driver.h>
65 #include <linux/tty_flip.h>
66 #include <linux/kmod.h>
67 #include <linux/rfkill.h>
68 #include <linux/ip.h>
69 #include <linux/uaccess.h>
70 #include <linux/usb/cdc.h>
71 #include <net/arp.h>
72 #include <asm/byteorder.h>
73 #include <linux/serial_core.h>
74 #include <linux/serial.h>
75
76
77 #define MOD_AUTHOR "Option Wireless"
78 #define MOD_DESCRIPTION "USB High Speed Option driver"
79 #define MOD_LICENSE "GPL"
80
81 #define HSO_MAX_NET_DEVICES 10
82 #define HSO__MAX_MTU 2048
83 #define DEFAULT_MTU 1500
84 #define DEFAULT_MRU 1500
85
86 #define CTRL_URB_RX_SIZE 1024
87 #define CTRL_URB_TX_SIZE 64
88
89 #define BULK_URB_RX_SIZE 4096
90 #define BULK_URB_TX_SIZE 8192
91
92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94 #define MUX_BULK_RX_BUF_COUNT 4
95 #define USB_TYPE_OPTION_VENDOR 0x20
96
97 /* These definitions are used with the struct hso_net flags element */
98 /* - use *_bit operations on it. (bit indices not values.) */
99 #define HSO_NET_RUNNING 0
100
101 #define HSO_NET_TX_TIMEOUT (HZ*10)
102
103 #define HSO_SERIAL_MAGIC 0x48534f31
104
105 /* Number of ttys to handle */
106 #define HSO_SERIAL_TTY_MINORS 256
107
108 #define MAX_RX_URBS 2
109
110 /*****************************************************************************/
111 /* Debugging functions */
112 /*****************************************************************************/
113 #define hso_dbg(lvl, fmt, ...) \
114 do { \
115 if ((lvl) & debug) \
116 pr_info("[%d:%s] " fmt, \
117 __LINE__, __func__, ##__VA_ARGS__); \
118 } while (0)
119
120 /*****************************************************************************/
121 /* Enumerators */
122 /*****************************************************************************/
123 enum pkt_parse_state {
124 WAIT_IP,
125 WAIT_DATA,
126 WAIT_SYNC
127 };
128
129 /*****************************************************************************/
130 /* Structs */
131 /*****************************************************************************/
132
133 struct hso_shared_int {
134 struct usb_endpoint_descriptor *intr_endp;
135 void *shared_intr_buf;
136 struct urb *shared_intr_urb;
137 struct usb_device *usb;
138 int use_count;
139 int ref_count;
140 struct mutex shared_int_lock;
141 };
142
143 struct hso_net {
144 struct hso_device *parent;
145 struct net_device *net;
146 struct rfkill *rfkill;
147 char name[24];
148
149 struct usb_endpoint_descriptor *in_endp;
150 struct usb_endpoint_descriptor *out_endp;
151
152 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
153 struct urb *mux_bulk_tx_urb;
154 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
155 void *mux_bulk_tx_buf;
156
157 struct sk_buff *skb_rx_buf;
158 struct sk_buff *skb_tx_buf;
159
160 enum pkt_parse_state rx_parse_state;
161 spinlock_t net_lock;
162
163 unsigned short rx_buf_size;
164 unsigned short rx_buf_missing;
165 struct iphdr rx_ip_hdr;
166
167 unsigned long flags;
168 };
169
170 enum rx_ctrl_state{
171 RX_IDLE,
172 RX_SENT,
173 RX_PENDING
174 };
175
176 #define BM_REQUEST_TYPE (0xa1)
177 #define B_NOTIFICATION (0x20)
178 #define W_VALUE (0x0)
179 #define W_LENGTH (0x2)
180
181 #define B_OVERRUN (0x1<<6)
182 #define B_PARITY (0x1<<5)
183 #define B_FRAMING (0x1<<4)
184 #define B_RING_SIGNAL (0x1<<3)
185 #define B_BREAK (0x1<<2)
186 #define B_TX_CARRIER (0x1<<1)
187 #define B_RX_CARRIER (0x1<<0)
188
189 struct hso_serial_state_notification {
190 u8 bmRequestType;
191 u8 bNotification;
192 u16 wValue;
193 u16 wIndex;
194 u16 wLength;
195 u16 UART_state_bitmap;
196 } __packed;
197
198 struct hso_tiocmget {
199 struct mutex mutex;
200 wait_queue_head_t waitq;
201 int intr_completed;
202 struct usb_endpoint_descriptor *endp;
203 struct urb *urb;
204 struct hso_serial_state_notification serial_state_notification;
205 u16 prev_UART_state_bitmap;
206 struct uart_icount icount;
207 };
208
209
210 struct hso_serial {
211 struct hso_device *parent;
212 int magic;
213 u8 minor;
214
215 struct hso_shared_int *shared_int;
216
217 /* rx/tx urb could be either a bulk urb or a control urb depending
218 on which serial port it is used on. */
219 struct urb *rx_urb[MAX_RX_URBS];
220 u8 num_rx_urbs;
221 u8 *rx_data[MAX_RX_URBS];
222 u16 rx_data_length; /* should contain allocated length */
223
224 struct urb *tx_urb;
225 u8 *tx_data;
226 u8 *tx_buffer;
227 u16 tx_data_length; /* should contain allocated length */
228 u16 tx_data_count;
229 u16 tx_buffer_count;
230 struct usb_ctrlrequest ctrl_req_tx;
231 struct usb_ctrlrequest ctrl_req_rx;
232
233 struct usb_endpoint_descriptor *in_endp;
234 struct usb_endpoint_descriptor *out_endp;
235
236 enum rx_ctrl_state rx_state;
237 u8 rts_state;
238 u8 dtr_state;
239 unsigned tx_urb_used:1;
240
241 struct tty_port port;
242 /* from usb_serial_port */
243 spinlock_t serial_lock;
244
245 int (*write_data) (struct hso_serial *serial);
246 struct hso_tiocmget *tiocmget;
247 /* Hacks required to get flow control
248 * working on the serial receive buffers
249 * so as not to drop characters on the floor.
250 */
251 int curr_rx_urb_idx;
252 u8 rx_urb_filled[MAX_RX_URBS];
253 struct tasklet_struct unthrottle_tasklet;
254 };
255
256 struct hso_device {
257 union {
258 struct hso_serial *dev_serial;
259 struct hso_net *dev_net;
260 } port_data;
261
262 u32 port_spec;
263
264 u8 is_active;
265 u8 usb_gone;
266 struct work_struct async_get_intf;
267 struct work_struct async_put_intf;
268
269 struct usb_device *usb;
270 struct usb_interface *interface;
271
272 struct device *dev;
273 struct kref ref;
274 struct mutex mutex;
275 };
276
277 /* Type of interface */
278 #define HSO_INTF_MASK 0xFF00
279 #define HSO_INTF_MUX 0x0100
280 #define HSO_INTF_BULK 0x0200
281
282 /* Type of port */
283 #define HSO_PORT_MASK 0xFF
284 #define HSO_PORT_NO_PORT 0x0
285 #define HSO_PORT_CONTROL 0x1
286 #define HSO_PORT_APP 0x2
287 #define HSO_PORT_GPS 0x3
288 #define HSO_PORT_PCSC 0x4
289 #define HSO_PORT_APP2 0x5
290 #define HSO_PORT_GPS_CONTROL 0x6
291 #define HSO_PORT_MSD 0x7
292 #define HSO_PORT_VOICE 0x8
293 #define HSO_PORT_DIAG2 0x9
294 #define HSO_PORT_DIAG 0x10
295 #define HSO_PORT_MODEM 0x11
296 #define HSO_PORT_NETWORK 0x12
297
298 /* Additional device info */
299 #define HSO_INFO_MASK 0xFF000000
300 #define HSO_INFO_CRC_BUG 0x01000000
301
302 /*****************************************************************************/
303 /* Prototypes */
304 /*****************************************************************************/
305 /* Serial driver functions */
306 static int hso_serial_tiocmset(struct tty_struct *tty,
307 unsigned int set, unsigned int clear);
308 static void ctrl_callback(struct urb *urb);
309 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
310 static void hso_kick_transmit(struct hso_serial *serial);
311 /* Helper functions */
312 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
313 struct usb_device *usb, gfp_t gfp);
314 static void handle_usb_error(int status, const char *function,
315 struct hso_device *hso_dev);
316 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
317 int type, int dir);
318 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
319 static void hso_free_interface(struct usb_interface *intf);
320 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
321 static int hso_stop_serial_device(struct hso_device *hso_dev);
322 static int hso_start_net_device(struct hso_device *hso_dev);
323 static void hso_free_shared_int(struct hso_shared_int *shared_int);
324 static int hso_stop_net_device(struct hso_device *hso_dev);
325 static void hso_serial_ref_free(struct kref *ref);
326 static void hso_std_serial_read_bulk_callback(struct urb *urb);
327 static int hso_mux_serial_read(struct hso_serial *serial);
328 static void async_get_intf(struct work_struct *data);
329 static void async_put_intf(struct work_struct *data);
330 static int hso_put_activity(struct hso_device *hso_dev);
331 static int hso_get_activity(struct hso_device *hso_dev);
332 static void tiocmget_intr_callback(struct urb *urb);
333 /*****************************************************************************/
334 /* Helping functions */
335 /*****************************************************************************/
336
337 /* #define DEBUG */
338
339 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
340 {
341 return hso_dev->port_data.dev_net;
342 }
343
344 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
345 {
346 return hso_dev->port_data.dev_serial;
347 }
348
349 /* Debugging functions */
350 #ifdef DEBUG
351 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
352 unsigned int len)
353 {
354 static char name[255];
355
356 sprintf(name, "hso[%d:%s]", line_count, func_name);
357 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
358 }
359
360 #define DUMP(buf_, len_) \
361 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
362
363 #define DUMP1(buf_, len_) \
364 do { \
365 if (0x01 & debug) \
366 DUMP(buf_, len_); \
367 } while (0)
368 #else
369 #define DUMP(buf_, len_)
370 #define DUMP1(buf_, len_)
371 #endif
372
373 /* module parameters */
374 static int debug;
375 static int tty_major;
376 static int disable_net;
377
378 /* driver info */
379 static const char driver_name[] = "hso";
380 static const char tty_filename[] = "ttyHS";
381 static const char *version = __FILE__ ": " MOD_AUTHOR;
382 /* the usb driver itself (registered in hso_init) */
383 static struct usb_driver hso_driver;
384 /* serial structures */
385 static struct tty_driver *tty_drv;
386 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
387 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
388 static spinlock_t serial_table_lock;
389
390 static const s32 default_port_spec[] = {
391 HSO_INTF_MUX | HSO_PORT_NETWORK,
392 HSO_INTF_BULK | HSO_PORT_DIAG,
393 HSO_INTF_BULK | HSO_PORT_MODEM,
394 0
395 };
396
397 static const s32 icon321_port_spec[] = {
398 HSO_INTF_MUX | HSO_PORT_NETWORK,
399 HSO_INTF_BULK | HSO_PORT_DIAG2,
400 HSO_INTF_BULK | HSO_PORT_MODEM,
401 HSO_INTF_BULK | HSO_PORT_DIAG,
402 0
403 };
404
405 #define default_port_device(vendor, product) \
406 USB_DEVICE(vendor, product), \
407 .driver_info = (kernel_ulong_t)default_port_spec
408
409 #define icon321_port_device(vendor, product) \
410 USB_DEVICE(vendor, product), \
411 .driver_info = (kernel_ulong_t)icon321_port_spec
412
413 /* list of devices we support */
414 static const struct usb_device_id hso_ids[] = {
415 {default_port_device(0x0af0, 0x6711)},
416 {default_port_device(0x0af0, 0x6731)},
417 {default_port_device(0x0af0, 0x6751)},
418 {default_port_device(0x0af0, 0x6771)},
419 {default_port_device(0x0af0, 0x6791)},
420 {default_port_device(0x0af0, 0x6811)},
421 {default_port_device(0x0af0, 0x6911)},
422 {default_port_device(0x0af0, 0x6951)},
423 {default_port_device(0x0af0, 0x6971)},
424 {default_port_device(0x0af0, 0x7011)},
425 {default_port_device(0x0af0, 0x7031)},
426 {default_port_device(0x0af0, 0x7051)},
427 {default_port_device(0x0af0, 0x7071)},
428 {default_port_device(0x0af0, 0x7111)},
429 {default_port_device(0x0af0, 0x7211)},
430 {default_port_device(0x0af0, 0x7251)},
431 {default_port_device(0x0af0, 0x7271)},
432 {default_port_device(0x0af0, 0x7311)},
433 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
434 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
435 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
436 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
437 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
438 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
439 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
440 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
441 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
442 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
443 {USB_DEVICE(0x0af0, 0x7701)},
444 {USB_DEVICE(0x0af0, 0x7706)},
445 {USB_DEVICE(0x0af0, 0x7801)},
446 {USB_DEVICE(0x0af0, 0x7901)},
447 {USB_DEVICE(0x0af0, 0x7A01)},
448 {USB_DEVICE(0x0af0, 0x7A05)},
449 {USB_DEVICE(0x0af0, 0x8200)},
450 {USB_DEVICE(0x0af0, 0x8201)},
451 {USB_DEVICE(0x0af0, 0x8300)},
452 {USB_DEVICE(0x0af0, 0x8302)},
453 {USB_DEVICE(0x0af0, 0x8304)},
454 {USB_DEVICE(0x0af0, 0x8400)},
455 {USB_DEVICE(0x0af0, 0x8600)},
456 {USB_DEVICE(0x0af0, 0x8800)},
457 {USB_DEVICE(0x0af0, 0x8900)},
458 {USB_DEVICE(0x0af0, 0x9000)},
459 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
460 {USB_DEVICE(0x0af0, 0xd035)},
461 {USB_DEVICE(0x0af0, 0xd055)},
462 {USB_DEVICE(0x0af0, 0xd155)},
463 {USB_DEVICE(0x0af0, 0xd255)},
464 {USB_DEVICE(0x0af0, 0xd057)},
465 {USB_DEVICE(0x0af0, 0xd157)},
466 {USB_DEVICE(0x0af0, 0xd257)},
467 {USB_DEVICE(0x0af0, 0xd357)},
468 {USB_DEVICE(0x0af0, 0xd058)},
469 {USB_DEVICE(0x0af0, 0xc100)},
470 {}
471 };
472 MODULE_DEVICE_TABLE(usb, hso_ids);
473
474 /* Sysfs attribute */
475 static ssize_t hso_sysfs_show_porttype(struct device *dev,
476 struct device_attribute *attr,
477 char *buf)
478 {
479 struct hso_device *hso_dev = dev_get_drvdata(dev);
480 char *port_name;
481
482 if (!hso_dev)
483 return 0;
484
485 switch (hso_dev->port_spec & HSO_PORT_MASK) {
486 case HSO_PORT_CONTROL:
487 port_name = "Control";
488 break;
489 case HSO_PORT_APP:
490 port_name = "Application";
491 break;
492 case HSO_PORT_APP2:
493 port_name = "Application2";
494 break;
495 case HSO_PORT_GPS:
496 port_name = "GPS";
497 break;
498 case HSO_PORT_GPS_CONTROL:
499 port_name = "GPS Control";
500 break;
501 case HSO_PORT_PCSC:
502 port_name = "PCSC";
503 break;
504 case HSO_PORT_DIAG:
505 port_name = "Diagnostic";
506 break;
507 case HSO_PORT_DIAG2:
508 port_name = "Diagnostic2";
509 break;
510 case HSO_PORT_MODEM:
511 port_name = "Modem";
512 break;
513 case HSO_PORT_NETWORK:
514 port_name = "Network";
515 break;
516 default:
517 port_name = "Unknown";
518 break;
519 }
520
521 return sprintf(buf, "%s\n", port_name);
522 }
523 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
524
525 static struct attribute *hso_serial_dev_attrs[] = {
526 &dev_attr_hsotype.attr,
527 NULL
528 };
529
530 ATTRIBUTE_GROUPS(hso_serial_dev);
531
532 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
533 {
534 int idx;
535
536 for (idx = 0; idx < serial->num_rx_urbs; idx++)
537 if (serial->rx_urb[idx] == urb)
538 return idx;
539 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
540 return -1;
541 }
542
543 /* converts mux value to a port spec value */
544 static u32 hso_mux_to_port(int mux)
545 {
546 u32 result;
547
548 switch (mux) {
549 case 0x1:
550 result = HSO_PORT_CONTROL;
551 break;
552 case 0x2:
553 result = HSO_PORT_APP;
554 break;
555 case 0x4:
556 result = HSO_PORT_PCSC;
557 break;
558 case 0x8:
559 result = HSO_PORT_GPS;
560 break;
561 case 0x10:
562 result = HSO_PORT_APP2;
563 break;
564 default:
565 result = HSO_PORT_NO_PORT;
566 }
567 return result;
568 }
569
570 /* converts port spec value to a mux value */
571 static u32 hso_port_to_mux(int port)
572 {
573 u32 result;
574
575 switch (port & HSO_PORT_MASK) {
576 case HSO_PORT_CONTROL:
577 result = 0x0;
578 break;
579 case HSO_PORT_APP:
580 result = 0x1;
581 break;
582 case HSO_PORT_PCSC:
583 result = 0x2;
584 break;
585 case HSO_PORT_GPS:
586 result = 0x3;
587 break;
588 case HSO_PORT_APP2:
589 result = 0x4;
590 break;
591 default:
592 result = 0x0;
593 }
594 return result;
595 }
596
597 static struct hso_serial *get_serial_by_shared_int_and_type(
598 struct hso_shared_int *shared_int,
599 int mux)
600 {
601 int i, port;
602
603 port = hso_mux_to_port(mux);
604
605 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
606 if (serial_table[i] &&
607 (dev2ser(serial_table[i])->shared_int == shared_int) &&
608 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
609 return dev2ser(serial_table[i]);
610 }
611 }
612
613 return NULL;
614 }
615
616 static struct hso_serial *get_serial_by_index(unsigned index)
617 {
618 struct hso_serial *serial = NULL;
619 unsigned long flags;
620
621 spin_lock_irqsave(&serial_table_lock, flags);
622 if (serial_table[index])
623 serial = dev2ser(serial_table[index]);
624 spin_unlock_irqrestore(&serial_table_lock, flags);
625
626 return serial;
627 }
628
629 static int get_free_serial_index(void)
630 {
631 int index;
632 unsigned long flags;
633
634 spin_lock_irqsave(&serial_table_lock, flags);
635 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
636 if (serial_table[index] == NULL) {
637 spin_unlock_irqrestore(&serial_table_lock, flags);
638 return index;
639 }
640 }
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642
643 pr_err("%s: no free serial devices in table\n", __func__);
644 return -1;
645 }
646
647 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
648 {
649 unsigned long flags;
650
651 spin_lock_irqsave(&serial_table_lock, flags);
652 if (serial)
653 serial_table[index] = serial->parent;
654 else
655 serial_table[index] = NULL;
656 spin_unlock_irqrestore(&serial_table_lock, flags);
657 }
658
659 static void handle_usb_error(int status, const char *function,
660 struct hso_device *hso_dev)
661 {
662 char *explanation;
663
664 switch (status) {
665 case -ENODEV:
666 explanation = "no device";
667 break;
668 case -ENOENT:
669 explanation = "endpoint not enabled";
670 break;
671 case -EPIPE:
672 explanation = "endpoint stalled";
673 break;
674 case -ENOSPC:
675 explanation = "not enough bandwidth";
676 break;
677 case -ESHUTDOWN:
678 explanation = "device disabled";
679 break;
680 case -EHOSTUNREACH:
681 explanation = "device suspended";
682 break;
683 case -EINVAL:
684 case -EAGAIN:
685 case -EFBIG:
686 case -EMSGSIZE:
687 explanation = "internal error";
688 break;
689 case -EILSEQ:
690 case -EPROTO:
691 case -ETIME:
692 case -ETIMEDOUT:
693 explanation = "protocol error";
694 if (hso_dev)
695 usb_queue_reset_device(hso_dev->interface);
696 break;
697 default:
698 explanation = "unknown status";
699 break;
700 }
701
702 /* log a meaningful explanation of an USB status */
703 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
704 function, explanation, status);
705 }
706
707 /* Network interface functions */
708
709 /* called when net interface is brought up by ifconfig */
710 static int hso_net_open(struct net_device *net)
711 {
712 struct hso_net *odev = netdev_priv(net);
713 unsigned long flags = 0;
714
715 if (!odev) {
716 dev_err(&net->dev, "No net device !\n");
717 return -ENODEV;
718 }
719
720 odev->skb_tx_buf = NULL;
721
722 /* setup environment */
723 spin_lock_irqsave(&odev->net_lock, flags);
724 odev->rx_parse_state = WAIT_IP;
725 odev->rx_buf_size = 0;
726 odev->rx_buf_missing = sizeof(struct iphdr);
727 spin_unlock_irqrestore(&odev->net_lock, flags);
728
729 /* We are up and running. */
730 set_bit(HSO_NET_RUNNING, &odev->flags);
731 hso_start_net_device(odev->parent);
732
733 /* Tell the kernel we are ready to start receiving from it */
734 netif_start_queue(net);
735
736 return 0;
737 }
738
739 /* called when interface is brought down by ifconfig */
740 static int hso_net_close(struct net_device *net)
741 {
742 struct hso_net *odev = netdev_priv(net);
743
744 /* we don't need the queue anymore */
745 netif_stop_queue(net);
746 /* no longer running */
747 clear_bit(HSO_NET_RUNNING, &odev->flags);
748
749 hso_stop_net_device(odev->parent);
750
751 /* done */
752 return 0;
753 }
754
755 /* USB tells is xmit done, we should start the netqueue again */
756 static void write_bulk_callback(struct urb *urb)
757 {
758 struct hso_net *odev = urb->context;
759 int status = urb->status;
760
761 /* Sanity check */
762 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
763 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
764 return;
765 }
766
767 /* Do we still have a valid kernel network device? */
768 if (!netif_device_present(odev->net)) {
769 dev_err(&urb->dev->dev, "%s: net device not present\n",
770 __func__);
771 return;
772 }
773
774 /* log status, but don't act on it, we don't need to resubmit anything
775 * anyhow */
776 if (status)
777 handle_usb_error(status, __func__, odev->parent);
778
779 hso_put_activity(odev->parent);
780
781 /* Tell the network interface we are ready for another frame */
782 netif_wake_queue(odev->net);
783 }
784
785 /* called by kernel when we need to transmit a packet */
786 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
787 struct net_device *net)
788 {
789 struct hso_net *odev = netdev_priv(net);
790 int result;
791
792 /* Tell the kernel, "No more frames 'til we are done with this one." */
793 netif_stop_queue(net);
794 if (hso_get_activity(odev->parent) == -EAGAIN) {
795 odev->skb_tx_buf = skb;
796 return NETDEV_TX_OK;
797 }
798
799 /* log if asked */
800 DUMP1(skb->data, skb->len);
801 /* Copy it from kernel memory to OUR memory */
802 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
803 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
804
805 /* Fill in the URB for shipping it out. */
806 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
807 odev->parent->usb,
808 usb_sndbulkpipe(odev->parent->usb,
809 odev->out_endp->
810 bEndpointAddress & 0x7F),
811 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
812 odev);
813
814 /* Deal with the Zero Length packet problem, I hope */
815 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
816
817 /* Send the URB on its merry way. */
818 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
819 if (result) {
820 dev_warn(&odev->parent->interface->dev,
821 "failed mux_bulk_tx_urb %d\n", result);
822 net->stats.tx_errors++;
823 netif_start_queue(net);
824 } else {
825 net->stats.tx_packets++;
826 net->stats.tx_bytes += skb->len;
827 }
828 dev_kfree_skb(skb);
829 /* we're done */
830 return NETDEV_TX_OK;
831 }
832
833 static const struct ethtool_ops ops = {
834 .get_link = ethtool_op_get_link
835 };
836
837 /* called when a packet did not ack after watchdogtimeout */
838 static void hso_net_tx_timeout(struct net_device *net)
839 {
840 struct hso_net *odev = netdev_priv(net);
841
842 if (!odev)
843 return;
844
845 /* Tell syslog we are hosed. */
846 dev_warn(&net->dev, "Tx timed out.\n");
847
848 /* Tear the waiting frame off the list */
849 if (odev->mux_bulk_tx_urb &&
850 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
851 usb_unlink_urb(odev->mux_bulk_tx_urb);
852
853 /* Update statistics */
854 net->stats.tx_errors++;
855 }
856
857 /* make a real packet from the received USB buffer */
858 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
859 unsigned int count, unsigned char is_eop)
860 {
861 unsigned short temp_bytes;
862 unsigned short buffer_offset = 0;
863 unsigned short frame_len;
864 unsigned char *tmp_rx_buf;
865
866 /* log if needed */
867 hso_dbg(0x1, "Rx %d bytes\n", count);
868 DUMP(ip_pkt, min(128, (int)count));
869
870 while (count) {
871 switch (odev->rx_parse_state) {
872 case WAIT_IP:
873 /* waiting for IP header. */
874 /* wanted bytes - size of ip header */
875 temp_bytes =
876 (count <
877 odev->rx_buf_missing) ? count : odev->
878 rx_buf_missing;
879
880 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
881 odev->rx_buf_size, ip_pkt + buffer_offset,
882 temp_bytes);
883
884 odev->rx_buf_size += temp_bytes;
885 buffer_offset += temp_bytes;
886 odev->rx_buf_missing -= temp_bytes;
887 count -= temp_bytes;
888
889 if (!odev->rx_buf_missing) {
890 /* header is complete allocate an sk_buffer and
891 * continue to WAIT_DATA */
892 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
893
894 if ((frame_len > DEFAULT_MRU) ||
895 (frame_len < sizeof(struct iphdr))) {
896 dev_err(&odev->net->dev,
897 "Invalid frame (%d) length\n",
898 frame_len);
899 odev->rx_parse_state = WAIT_SYNC;
900 continue;
901 }
902 /* Allocate an sk_buff */
903 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
904 frame_len);
905 if (!odev->skb_rx_buf) {
906 /* We got no receive buffer. */
907 hso_dbg(0x1, "could not allocate memory\n");
908 odev->rx_parse_state = WAIT_SYNC;
909 continue;
910 }
911
912 /* Copy what we got so far. make room for iphdr
913 * after tail. */
914 tmp_rx_buf = skb_put_data(odev->skb_rx_buf,
915 (char *)&(odev->rx_ip_hdr),
916 sizeof(struct iphdr));
917
918 /* ETH_HLEN */
919 odev->rx_buf_size = sizeof(struct iphdr);
920
921 /* Filip actually use .tot_len */
922 odev->rx_buf_missing =
923 frame_len - sizeof(struct iphdr);
924 odev->rx_parse_state = WAIT_DATA;
925 }
926 break;
927
928 case WAIT_DATA:
929 temp_bytes = (count < odev->rx_buf_missing)
930 ? count : odev->rx_buf_missing;
931
932 /* Copy the rest of the bytes that are left in the
933 * buffer into the waiting sk_buf. */
934 /* Make room for temp_bytes after tail. */
935 tmp_rx_buf = skb_put_data(odev->skb_rx_buf,
936 ip_pkt + buffer_offset,
937 temp_bytes);
938
939 odev->rx_buf_missing -= temp_bytes;
940 count -= temp_bytes;
941 buffer_offset += temp_bytes;
942 odev->rx_buf_size += temp_bytes;
943 if (!odev->rx_buf_missing) {
944 /* Packet is complete. Inject into stack. */
945 /* We have IP packet here */
946 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
947 skb_reset_mac_header(odev->skb_rx_buf);
948
949 /* Ship it off to the kernel */
950 netif_rx(odev->skb_rx_buf);
951 /* No longer our buffer. */
952 odev->skb_rx_buf = NULL;
953
954 /* update out statistics */
955 odev->net->stats.rx_packets++;
956
957 odev->net->stats.rx_bytes += odev->rx_buf_size;
958
959 odev->rx_buf_size = 0;
960 odev->rx_buf_missing = sizeof(struct iphdr);
961 odev->rx_parse_state = WAIT_IP;
962 }
963 break;
964
965 case WAIT_SYNC:
966 hso_dbg(0x1, " W_S\n");
967 count = 0;
968 break;
969 default:
970 hso_dbg(0x1, "\n");
971 count--;
972 break;
973 }
974 }
975
976 /* Recovery mechanism for WAIT_SYNC state. */
977 if (is_eop) {
978 if (odev->rx_parse_state == WAIT_SYNC) {
979 odev->rx_parse_state = WAIT_IP;
980 odev->rx_buf_size = 0;
981 odev->rx_buf_missing = sizeof(struct iphdr);
982 }
983 }
984 }
985
986 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
987 {
988 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
989 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
990
991 if (((rest == 5) || (rest == 6)) &&
992 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
993 crc_check, 4)) {
994 urb->actual_length -= 4;
995 }
996 }
997
998 /* Moving data from usb to kernel (in interrupt state) */
999 static void read_bulk_callback(struct urb *urb)
1000 {
1001 struct hso_net *odev = urb->context;
1002 struct net_device *net;
1003 int result;
1004 int status = urb->status;
1005
1006 /* is al ok? (Filip: Who's Al ?) */
1007 if (status) {
1008 handle_usb_error(status, __func__, odev->parent);
1009 return;
1010 }
1011
1012 /* Sanity check */
1013 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1014 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
1015 return;
1016 }
1017 usb_mark_last_busy(urb->dev);
1018
1019 net = odev->net;
1020
1021 if (!netif_device_present(net)) {
1022 /* Somebody killed our network interface... */
1023 return;
1024 }
1025
1026 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1027 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1028
1029 /* do we even have a packet? */
1030 if (urb->actual_length) {
1031 /* Handle the IP stream, add header and push it onto network
1032 * stack if the packet is complete. */
1033 spin_lock(&odev->net_lock);
1034 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1035 (urb->transfer_buffer_length >
1036 urb->actual_length) ? 1 : 0);
1037 spin_unlock(&odev->net_lock);
1038 }
1039
1040 /* We are done with this URB, resubmit it. Prep the USB to wait for
1041 * another frame. Reuse same as received. */
1042 usb_fill_bulk_urb(urb,
1043 odev->parent->usb,
1044 usb_rcvbulkpipe(odev->parent->usb,
1045 odev->in_endp->
1046 bEndpointAddress & 0x7F),
1047 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1048 read_bulk_callback, odev);
1049
1050 /* Give this to the USB subsystem so it can tell us when more data
1051 * arrives. */
1052 result = usb_submit_urb(urb, GFP_ATOMIC);
1053 if (result)
1054 dev_warn(&odev->parent->interface->dev,
1055 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1056 result);
1057 }
1058
1059 /* Serial driver functions */
1060
1061 static void hso_init_termios(struct ktermios *termios)
1062 {
1063 /*
1064 * The default requirements for this device are:
1065 */
1066 termios->c_iflag &=
1067 ~(IGNBRK /* disable ignore break */
1068 | BRKINT /* disable break causes interrupt */
1069 | PARMRK /* disable mark parity errors */
1070 | ISTRIP /* disable clear high bit of input characters */
1071 | INLCR /* disable translate NL to CR */
1072 | IGNCR /* disable ignore CR */
1073 | ICRNL /* disable translate CR to NL */
1074 | IXON); /* disable enable XON/XOFF flow control */
1075
1076 /* disable postprocess output characters */
1077 termios->c_oflag &= ~OPOST;
1078
1079 termios->c_lflag &=
1080 ~(ECHO /* disable echo input characters */
1081 | ECHONL /* disable echo new line */
1082 | ICANON /* disable erase, kill, werase, and rprnt
1083 special characters */
1084 | ISIG /* disable interrupt, quit, and suspend special
1085 characters */
1086 | IEXTEN); /* disable non-POSIX special characters */
1087
1088 termios->c_cflag &=
1089 ~(CSIZE /* no size */
1090 | PARENB /* disable parity bit */
1091 | CBAUD /* clear current baud rate */
1092 | CBAUDEX); /* clear current buad rate */
1093
1094 termios->c_cflag |= CS8; /* character size 8 bits */
1095
1096 /* baud rate 115200 */
1097 tty_termios_encode_baud_rate(termios, 115200, 115200);
1098 }
1099
1100 static void _hso_serial_set_termios(struct tty_struct *tty,
1101 struct ktermios *old)
1102 {
1103 struct hso_serial *serial = tty->driver_data;
1104
1105 if (!serial) {
1106 pr_err("%s: no tty structures", __func__);
1107 return;
1108 }
1109
1110 hso_dbg(0x8, "port %d\n", serial->minor);
1111
1112 /*
1113 * Fix up unsupported bits
1114 */
1115 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1116
1117 tty->termios.c_cflag &=
1118 ~(CSIZE /* no size */
1119 | PARENB /* disable parity bit */
1120 | CBAUD /* clear current baud rate */
1121 | CBAUDEX); /* clear current buad rate */
1122
1123 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1124
1125 /* baud rate 115200 */
1126 tty_encode_baud_rate(tty, 115200, 115200);
1127 }
1128
1129 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1130 {
1131 int result;
1132 /* We are done with this URB, resubmit it. Prep the USB to wait for
1133 * another frame */
1134 usb_fill_bulk_urb(urb, serial->parent->usb,
1135 usb_rcvbulkpipe(serial->parent->usb,
1136 serial->in_endp->
1137 bEndpointAddress & 0x7F),
1138 urb->transfer_buffer, serial->rx_data_length,
1139 hso_std_serial_read_bulk_callback, serial);
1140 /* Give this to the USB subsystem so it can tell us when more data
1141 * arrives. */
1142 result = usb_submit_urb(urb, GFP_ATOMIC);
1143 if (result) {
1144 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1145 __func__, result);
1146 }
1147 }
1148
1149
1150
1151
1152 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1153 {
1154 int count;
1155 struct urb *curr_urb;
1156
1157 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1158 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1159 count = put_rxbuf_data(curr_urb, serial);
1160 if (count == -1)
1161 return;
1162 if (count == 0) {
1163 serial->curr_rx_urb_idx++;
1164 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1165 serial->curr_rx_urb_idx = 0;
1166 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1167 }
1168 }
1169 }
1170
1171 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1172 {
1173 int count = 0;
1174 struct urb *urb;
1175
1176 urb = serial->rx_urb[0];
1177 if (serial->port.count > 0) {
1178 count = put_rxbuf_data(urb, serial);
1179 if (count == -1)
1180 return;
1181 }
1182 /* Re issue a read as long as we receive data. */
1183
1184 if (count == 0 && ((urb->actual_length != 0) ||
1185 (serial->rx_state == RX_PENDING))) {
1186 serial->rx_state = RX_SENT;
1187 hso_mux_serial_read(serial);
1188 } else
1189 serial->rx_state = RX_IDLE;
1190 }
1191
1192
1193 /* read callback for Diag and CS port */
1194 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1195 {
1196 struct hso_serial *serial = urb->context;
1197 int status = urb->status;
1198
1199 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1200
1201 /* sanity check */
1202 if (!serial) {
1203 hso_dbg(0x1, "serial == NULL\n");
1204 return;
1205 }
1206 if (status) {
1207 handle_usb_error(status, __func__, serial->parent);
1208 return;
1209 }
1210
1211 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1212 DUMP1(urb->transfer_buffer, urb->actual_length);
1213
1214 /* Anyone listening? */
1215 if (serial->port.count == 0)
1216 return;
1217
1218 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1219 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1220 /* Valid data, handle RX data */
1221 spin_lock(&serial->serial_lock);
1222 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1223 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1224 spin_unlock(&serial->serial_lock);
1225 }
1226
1227 /*
1228 * This needs to be a tasklet otherwise we will
1229 * end up recursively calling this function.
1230 */
1231 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1232 {
1233 unsigned long flags;
1234
1235 spin_lock_irqsave(&serial->serial_lock, flags);
1236 if ((serial->parent->port_spec & HSO_INTF_MUX))
1237 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1238 else
1239 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1240 spin_unlock_irqrestore(&serial->serial_lock, flags);
1241 }
1242
1243 static void hso_unthrottle(struct tty_struct *tty)
1244 {
1245 struct hso_serial *serial = tty->driver_data;
1246
1247 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1248 }
1249
1250 /* open the requested serial port */
1251 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1252 {
1253 struct hso_serial *serial = get_serial_by_index(tty->index);
1254 int result;
1255
1256 /* sanity check */
1257 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1258 WARN_ON(1);
1259 tty->driver_data = NULL;
1260 hso_dbg(0x1, "Failed to open port\n");
1261 return -ENODEV;
1262 }
1263
1264 mutex_lock(&serial->parent->mutex);
1265 result = usb_autopm_get_interface(serial->parent->interface);
1266 if (result < 0)
1267 goto err_out;
1268
1269 hso_dbg(0x1, "Opening %d\n", serial->minor);
1270
1271 /* setup */
1272 tty->driver_data = serial;
1273 tty_port_tty_set(&serial->port, tty);
1274
1275 /* check for port already opened, if not set the termios */
1276 serial->port.count++;
1277 if (serial->port.count == 1) {
1278 serial->rx_state = RX_IDLE;
1279 /* Force default termio settings */
1280 _hso_serial_set_termios(tty, NULL);
1281 tasklet_init(&serial->unthrottle_tasklet,
1282 (void (*)(unsigned long))hso_unthrottle_tasklet,
1283 (unsigned long)serial);
1284 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1285 if (result) {
1286 hso_stop_serial_device(serial->parent);
1287 serial->port.count--;
1288 } else {
1289 kref_get(&serial->parent->ref);
1290 }
1291 } else {
1292 hso_dbg(0x1, "Port was already open\n");
1293 }
1294
1295 usb_autopm_put_interface(serial->parent->interface);
1296
1297 /* done */
1298 if (result)
1299 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1300 err_out:
1301 mutex_unlock(&serial->parent->mutex);
1302 return result;
1303 }
1304
1305 /* close the requested serial port */
1306 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1307 {
1308 struct hso_serial *serial = tty->driver_data;
1309 u8 usb_gone;
1310
1311 hso_dbg(0x1, "Closing serial port\n");
1312
1313 /* Open failed, no close cleanup required */
1314 if (serial == NULL)
1315 return;
1316
1317 mutex_lock(&serial->parent->mutex);
1318 usb_gone = serial->parent->usb_gone;
1319
1320 if (!usb_gone)
1321 usb_autopm_get_interface(serial->parent->interface);
1322
1323 /* reset the rts and dtr */
1324 /* do the actual close */
1325 serial->port.count--;
1326
1327 if (serial->port.count <= 0) {
1328 serial->port.count = 0;
1329 tty_port_tty_set(&serial->port, NULL);
1330 if (!usb_gone)
1331 hso_stop_serial_device(serial->parent);
1332 tasklet_kill(&serial->unthrottle_tasklet);
1333 }
1334
1335 if (!usb_gone)
1336 usb_autopm_put_interface(serial->parent->interface);
1337
1338 mutex_unlock(&serial->parent->mutex);
1339 }
1340
1341 /* close the requested serial port */
1342 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1343 int count)
1344 {
1345 struct hso_serial *serial = tty->driver_data;
1346 int space, tx_bytes;
1347 unsigned long flags;
1348
1349 /* sanity check */
1350 if (serial == NULL) {
1351 pr_err("%s: serial is NULL\n", __func__);
1352 return -ENODEV;
1353 }
1354
1355 spin_lock_irqsave(&serial->serial_lock, flags);
1356
1357 space = serial->tx_data_length - serial->tx_buffer_count;
1358 tx_bytes = (count < space) ? count : space;
1359
1360 if (!tx_bytes)
1361 goto out;
1362
1363 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1364 serial->tx_buffer_count += tx_bytes;
1365
1366 out:
1367 spin_unlock_irqrestore(&serial->serial_lock, flags);
1368
1369 hso_kick_transmit(serial);
1370 /* done */
1371 return tx_bytes;
1372 }
1373
1374 /* how much room is there for writing */
1375 static int hso_serial_write_room(struct tty_struct *tty)
1376 {
1377 struct hso_serial *serial = tty->driver_data;
1378 int room;
1379 unsigned long flags;
1380
1381 spin_lock_irqsave(&serial->serial_lock, flags);
1382 room = serial->tx_data_length - serial->tx_buffer_count;
1383 spin_unlock_irqrestore(&serial->serial_lock, flags);
1384
1385 /* return free room */
1386 return room;
1387 }
1388
1389 static void hso_serial_cleanup(struct tty_struct *tty)
1390 {
1391 struct hso_serial *serial = tty->driver_data;
1392
1393 if (!serial)
1394 return;
1395
1396 kref_put(&serial->parent->ref, hso_serial_ref_free);
1397 }
1398
1399 /* setup the term */
1400 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1401 {
1402 struct hso_serial *serial = tty->driver_data;
1403 unsigned long flags;
1404
1405 if (old)
1406 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1407 tty->termios.c_cflag, old->c_cflag);
1408
1409 /* the actual setup */
1410 spin_lock_irqsave(&serial->serial_lock, flags);
1411 if (serial->port.count)
1412 _hso_serial_set_termios(tty, old);
1413 else
1414 tty->termios = *old;
1415 spin_unlock_irqrestore(&serial->serial_lock, flags);
1416
1417 /* done */
1418 }
1419
1420 /* how many characters in the buffer */
1421 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1422 {
1423 struct hso_serial *serial = tty->driver_data;
1424 int chars;
1425 unsigned long flags;
1426
1427 /* sanity check */
1428 if (serial == NULL)
1429 return 0;
1430
1431 spin_lock_irqsave(&serial->serial_lock, flags);
1432 chars = serial->tx_buffer_count;
1433 spin_unlock_irqrestore(&serial->serial_lock, flags);
1434
1435 return chars;
1436 }
1437 static int tiocmget_submit_urb(struct hso_serial *serial,
1438 struct hso_tiocmget *tiocmget,
1439 struct usb_device *usb)
1440 {
1441 int result;
1442
1443 if (serial->parent->usb_gone)
1444 return -ENODEV;
1445 usb_fill_int_urb(tiocmget->urb, usb,
1446 usb_rcvintpipe(usb,
1447 tiocmget->endp->
1448 bEndpointAddress & 0x7F),
1449 &tiocmget->serial_state_notification,
1450 sizeof(struct hso_serial_state_notification),
1451 tiocmget_intr_callback, serial,
1452 tiocmget->endp->bInterval);
1453 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1454 if (result) {
1455 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1456 result);
1457 }
1458 return result;
1459
1460 }
1461
1462 static void tiocmget_intr_callback(struct urb *urb)
1463 {
1464 struct hso_serial *serial = urb->context;
1465 struct hso_tiocmget *tiocmget;
1466 int status = urb->status;
1467 u16 UART_state_bitmap, prev_UART_state_bitmap;
1468 struct uart_icount *icount;
1469 struct hso_serial_state_notification *serial_state_notification;
1470 struct usb_device *usb;
1471 struct usb_interface *interface;
1472 int if_num;
1473
1474 /* Sanity checks */
1475 if (!serial)
1476 return;
1477 if (status) {
1478 handle_usb_error(status, __func__, serial->parent);
1479 return;
1480 }
1481
1482 /* tiocmget is only supported on HSO_PORT_MODEM */
1483 tiocmget = serial->tiocmget;
1484 if (!tiocmget)
1485 return;
1486 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1487
1488 usb = serial->parent->usb;
1489 interface = serial->parent->interface;
1490
1491 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1492
1493 /* wIndex should be the USB interface number of the port to which the
1494 * notification applies, which should always be the Modem port.
1495 */
1496 serial_state_notification = &tiocmget->serial_state_notification;
1497 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1498 serial_state_notification->bNotification != B_NOTIFICATION ||
1499 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1500 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1501 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1502 dev_warn(&usb->dev,
1503 "hso received invalid serial state notification\n");
1504 DUMP(serial_state_notification,
1505 sizeof(struct hso_serial_state_notification));
1506 } else {
1507
1508 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1509 UART_state_bitmap);
1510 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1511 icount = &tiocmget->icount;
1512 spin_lock(&serial->serial_lock);
1513 if ((UART_state_bitmap & B_OVERRUN) !=
1514 (prev_UART_state_bitmap & B_OVERRUN))
1515 icount->parity++;
1516 if ((UART_state_bitmap & B_PARITY) !=
1517 (prev_UART_state_bitmap & B_PARITY))
1518 icount->parity++;
1519 if ((UART_state_bitmap & B_FRAMING) !=
1520 (prev_UART_state_bitmap & B_FRAMING))
1521 icount->frame++;
1522 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1523 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1524 icount->rng++;
1525 if ((UART_state_bitmap & B_BREAK) !=
1526 (prev_UART_state_bitmap & B_BREAK))
1527 icount->brk++;
1528 if ((UART_state_bitmap & B_TX_CARRIER) !=
1529 (prev_UART_state_bitmap & B_TX_CARRIER))
1530 icount->dsr++;
1531 if ((UART_state_bitmap & B_RX_CARRIER) !=
1532 (prev_UART_state_bitmap & B_RX_CARRIER))
1533 icount->dcd++;
1534 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1535 spin_unlock(&serial->serial_lock);
1536 tiocmget->intr_completed = 1;
1537 wake_up_interruptible(&tiocmget->waitq);
1538 }
1539 memset(serial_state_notification, 0,
1540 sizeof(struct hso_serial_state_notification));
1541 tiocmget_submit_urb(serial,
1542 tiocmget,
1543 serial->parent->usb);
1544 }
1545
1546 /*
1547 * next few functions largely stolen from drivers/serial/serial_core.c
1548 */
1549 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1550 * - mask passed in arg for lines of interest
1551 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1552 * Caller should use TIOCGICOUNT to see which one it was
1553 */
1554 static int
1555 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1556 {
1557 DECLARE_WAITQUEUE(wait, current);
1558 struct uart_icount cprev, cnow;
1559 struct hso_tiocmget *tiocmget;
1560 int ret;
1561
1562 tiocmget = serial->tiocmget;
1563 if (!tiocmget)
1564 return -ENOENT;
1565 /*
1566 * note the counters on entry
1567 */
1568 spin_lock_irq(&serial->serial_lock);
1569 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1570 spin_unlock_irq(&serial->serial_lock);
1571 add_wait_queue(&tiocmget->waitq, &wait);
1572 for (;;) {
1573 spin_lock_irq(&serial->serial_lock);
1574 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1575 spin_unlock_irq(&serial->serial_lock);
1576 set_current_state(TASK_INTERRUPTIBLE);
1577 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1578 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1579 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1580 ret = 0;
1581 break;
1582 }
1583 schedule();
1584 /* see if a signal did it */
1585 if (signal_pending(current)) {
1586 ret = -ERESTARTSYS;
1587 break;
1588 }
1589 cprev = cnow;
1590 }
1591 __set_current_state(TASK_RUNNING);
1592 remove_wait_queue(&tiocmget->waitq, &wait);
1593
1594 return ret;
1595 }
1596
1597 /*
1598 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1599 * Return: write counters to the user passed counter struct
1600 * NB: both 1->0 and 0->1 transitions are counted except for
1601 * RI where only 0->1 is counted.
1602 */
1603 static int hso_get_count(struct tty_struct *tty,
1604 struct serial_icounter_struct *icount)
1605 {
1606 struct uart_icount cnow;
1607 struct hso_serial *serial = tty->driver_data;
1608 struct hso_tiocmget *tiocmget = serial->tiocmget;
1609
1610 memset(icount, 0, sizeof(struct serial_icounter_struct));
1611
1612 if (!tiocmget)
1613 return -ENOENT;
1614 spin_lock_irq(&serial->serial_lock);
1615 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1616 spin_unlock_irq(&serial->serial_lock);
1617
1618 icount->cts = cnow.cts;
1619 icount->dsr = cnow.dsr;
1620 icount->rng = cnow.rng;
1621 icount->dcd = cnow.dcd;
1622 icount->rx = cnow.rx;
1623 icount->tx = cnow.tx;
1624 icount->frame = cnow.frame;
1625 icount->overrun = cnow.overrun;
1626 icount->parity = cnow.parity;
1627 icount->brk = cnow.brk;
1628 icount->buf_overrun = cnow.buf_overrun;
1629
1630 return 0;
1631 }
1632
1633
1634 static int hso_serial_tiocmget(struct tty_struct *tty)
1635 {
1636 int retval;
1637 struct hso_serial *serial = tty->driver_data;
1638 struct hso_tiocmget *tiocmget;
1639 u16 UART_state_bitmap;
1640
1641 /* sanity check */
1642 if (!serial) {
1643 hso_dbg(0x1, "no tty structures\n");
1644 return -EINVAL;
1645 }
1646 spin_lock_irq(&serial->serial_lock);
1647 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1648 ((serial->dtr_state) ? TIOCM_DTR : 0);
1649 tiocmget = serial->tiocmget;
1650 if (tiocmget) {
1651
1652 UART_state_bitmap = le16_to_cpu(
1653 tiocmget->prev_UART_state_bitmap);
1654 if (UART_state_bitmap & B_RING_SIGNAL)
1655 retval |= TIOCM_RNG;
1656 if (UART_state_bitmap & B_RX_CARRIER)
1657 retval |= TIOCM_CD;
1658 if (UART_state_bitmap & B_TX_CARRIER)
1659 retval |= TIOCM_DSR;
1660 }
1661 spin_unlock_irq(&serial->serial_lock);
1662 return retval;
1663 }
1664
1665 static int hso_serial_tiocmset(struct tty_struct *tty,
1666 unsigned int set, unsigned int clear)
1667 {
1668 int val = 0;
1669 unsigned long flags;
1670 int if_num;
1671 struct hso_serial *serial = tty->driver_data;
1672 struct usb_interface *interface;
1673
1674 /* sanity check */
1675 if (!serial) {
1676 hso_dbg(0x1, "no tty structures\n");
1677 return -EINVAL;
1678 }
1679
1680 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1681 return -EINVAL;
1682
1683 interface = serial->parent->interface;
1684 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1685
1686 spin_lock_irqsave(&serial->serial_lock, flags);
1687 if (set & TIOCM_RTS)
1688 serial->rts_state = 1;
1689 if (set & TIOCM_DTR)
1690 serial->dtr_state = 1;
1691
1692 if (clear & TIOCM_RTS)
1693 serial->rts_state = 0;
1694 if (clear & TIOCM_DTR)
1695 serial->dtr_state = 0;
1696
1697 if (serial->dtr_state)
1698 val |= 0x01;
1699 if (serial->rts_state)
1700 val |= 0x02;
1701
1702 spin_unlock_irqrestore(&serial->serial_lock, flags);
1703
1704 return usb_control_msg(serial->parent->usb,
1705 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1706 0x21, val, if_num, NULL, 0,
1707 USB_CTRL_SET_TIMEOUT);
1708 }
1709
1710 static int hso_serial_ioctl(struct tty_struct *tty,
1711 unsigned int cmd, unsigned long arg)
1712 {
1713 struct hso_serial *serial = tty->driver_data;
1714 int ret = 0;
1715 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1716
1717 if (!serial)
1718 return -ENODEV;
1719 switch (cmd) {
1720 case TIOCMIWAIT:
1721 ret = hso_wait_modem_status(serial, arg);
1722 break;
1723 default:
1724 ret = -ENOIOCTLCMD;
1725 break;
1726 }
1727 return ret;
1728 }
1729
1730
1731 /* starts a transmit */
1732 static void hso_kick_transmit(struct hso_serial *serial)
1733 {
1734 u8 *temp;
1735 unsigned long flags;
1736 int res;
1737
1738 spin_lock_irqsave(&serial->serial_lock, flags);
1739 if (!serial->tx_buffer_count)
1740 goto out;
1741
1742 if (serial->tx_urb_used)
1743 goto out;
1744
1745 /* Wakeup USB interface if necessary */
1746 if (hso_get_activity(serial->parent) == -EAGAIN)
1747 goto out;
1748
1749 /* Switch pointers around to avoid memcpy */
1750 temp = serial->tx_buffer;
1751 serial->tx_buffer = serial->tx_data;
1752 serial->tx_data = temp;
1753 serial->tx_data_count = serial->tx_buffer_count;
1754 serial->tx_buffer_count = 0;
1755
1756 /* If temp is set, it means we switched buffers */
1757 if (temp && serial->write_data) {
1758 res = serial->write_data(serial);
1759 if (res >= 0)
1760 serial->tx_urb_used = 1;
1761 }
1762 out:
1763 spin_unlock_irqrestore(&serial->serial_lock, flags);
1764 }
1765
1766 /* make a request (for reading and writing data to muxed serial port) */
1767 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1768 struct urb *ctrl_urb,
1769 struct usb_ctrlrequest *ctrl_req,
1770 u8 *ctrl_urb_data, u32 size)
1771 {
1772 int result;
1773 int pipe;
1774
1775 /* Sanity check */
1776 if (!serial || !ctrl_urb || !ctrl_req) {
1777 pr_err("%s: Wrong arguments\n", __func__);
1778 return -EINVAL;
1779 }
1780
1781 /* initialize */
1782 ctrl_req->wValue = 0;
1783 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1784 ctrl_req->wLength = cpu_to_le16(size);
1785
1786 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1787 /* Reading command */
1788 ctrl_req->bRequestType = USB_DIR_IN |
1789 USB_TYPE_OPTION_VENDOR |
1790 USB_RECIP_INTERFACE;
1791 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1792 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1793 } else {
1794 /* Writing command */
1795 ctrl_req->bRequestType = USB_DIR_OUT |
1796 USB_TYPE_OPTION_VENDOR |
1797 USB_RECIP_INTERFACE;
1798 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1799 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1800 }
1801 /* syslog */
1802 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1803 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1804 ctrl_req->bRequestType, ctrl_req->wLength, port);
1805
1806 /* Load ctrl urb */
1807 ctrl_urb->transfer_flags = 0;
1808 usb_fill_control_urb(ctrl_urb,
1809 serial->parent->usb,
1810 pipe,
1811 (u8 *) ctrl_req,
1812 ctrl_urb_data, size, ctrl_callback, serial);
1813 /* Send it on merry way */
1814 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1815 if (result) {
1816 dev_err(&ctrl_urb->dev->dev,
1817 "%s failed submit ctrl_urb %d type %d\n", __func__,
1818 result, type);
1819 return result;
1820 }
1821
1822 /* done */
1823 return size;
1824 }
1825
1826 /* called by intr_callback when read occurs */
1827 static int hso_mux_serial_read(struct hso_serial *serial)
1828 {
1829 if (!serial)
1830 return -EINVAL;
1831
1832 /* clean data */
1833 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1834 /* make the request */
1835
1836 if (serial->num_rx_urbs != 1) {
1837 dev_err(&serial->parent->interface->dev,
1838 "ERROR: mux'd reads with multiple buffers "
1839 "not possible\n");
1840 return 0;
1841 }
1842 return mux_device_request(serial,
1843 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1844 serial->parent->port_spec & HSO_PORT_MASK,
1845 serial->rx_urb[0],
1846 &serial->ctrl_req_rx,
1847 serial->rx_data[0], serial->rx_data_length);
1848 }
1849
1850 /* used for muxed serial port callback (muxed serial read) */
1851 static void intr_callback(struct urb *urb)
1852 {
1853 struct hso_shared_int *shared_int = urb->context;
1854 struct hso_serial *serial;
1855 unsigned char *port_req;
1856 int status = urb->status;
1857 int i;
1858
1859 usb_mark_last_busy(urb->dev);
1860
1861 /* sanity check */
1862 if (!shared_int)
1863 return;
1864
1865 /* status check */
1866 if (status) {
1867 handle_usb_error(status, __func__, NULL);
1868 return;
1869 }
1870 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1871
1872 /* what request? */
1873 port_req = urb->transfer_buffer;
1874 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1875 /* loop over all muxed ports to find the one sending this */
1876 for (i = 0; i < 8; i++) {
1877 /* max 8 channels on MUX */
1878 if (*port_req & (1 << i)) {
1879 serial = get_serial_by_shared_int_and_type(shared_int,
1880 (1 << i));
1881 if (serial != NULL) {
1882 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1883 i);
1884 spin_lock(&serial->serial_lock);
1885 if (serial->rx_state == RX_IDLE &&
1886 serial->port.count > 0) {
1887 /* Setup and send a ctrl req read on
1888 * port i */
1889 if (!serial->rx_urb_filled[0]) {
1890 serial->rx_state = RX_SENT;
1891 hso_mux_serial_read(serial);
1892 } else
1893 serial->rx_state = RX_PENDING;
1894 } else {
1895 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1896 i);
1897 }
1898 spin_unlock(&serial->serial_lock);
1899 }
1900 }
1901 }
1902 /* Resubmit interrupt urb */
1903 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1904 }
1905
1906 /* called for writing to muxed serial port */
1907 static int hso_mux_serial_write_data(struct hso_serial *serial)
1908 {
1909 if (NULL == serial)
1910 return -EINVAL;
1911
1912 return mux_device_request(serial,
1913 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1914 serial->parent->port_spec & HSO_PORT_MASK,
1915 serial->tx_urb,
1916 &serial->ctrl_req_tx,
1917 serial->tx_data, serial->tx_data_count);
1918 }
1919
1920 /* write callback for Diag and CS port */
1921 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1922 {
1923 struct hso_serial *serial = urb->context;
1924 int status = urb->status;
1925
1926 /* sanity check */
1927 if (!serial) {
1928 hso_dbg(0x1, "serial == NULL\n");
1929 return;
1930 }
1931
1932 spin_lock(&serial->serial_lock);
1933 serial->tx_urb_used = 0;
1934 spin_unlock(&serial->serial_lock);
1935 if (status) {
1936 handle_usb_error(status, __func__, serial->parent);
1937 return;
1938 }
1939 hso_put_activity(serial->parent);
1940 tty_port_tty_wakeup(&serial->port);
1941 hso_kick_transmit(serial);
1942
1943 hso_dbg(0x1, "\n");
1944 }
1945
1946 /* called for writing diag or CS serial port */
1947 static int hso_std_serial_write_data(struct hso_serial *serial)
1948 {
1949 int count = serial->tx_data_count;
1950 int result;
1951
1952 usb_fill_bulk_urb(serial->tx_urb,
1953 serial->parent->usb,
1954 usb_sndbulkpipe(serial->parent->usb,
1955 serial->out_endp->
1956 bEndpointAddress & 0x7F),
1957 serial->tx_data, serial->tx_data_count,
1958 hso_std_serial_write_bulk_callback, serial);
1959
1960 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1961 if (result) {
1962 dev_warn(&serial->parent->usb->dev,
1963 "Failed to submit urb - res %d\n", result);
1964 return result;
1965 }
1966
1967 return count;
1968 }
1969
1970 /* callback after read or write on muxed serial port */
1971 static void ctrl_callback(struct urb *urb)
1972 {
1973 struct hso_serial *serial = urb->context;
1974 struct usb_ctrlrequest *req;
1975 int status = urb->status;
1976
1977 /* sanity check */
1978 if (!serial)
1979 return;
1980
1981 spin_lock(&serial->serial_lock);
1982 serial->tx_urb_used = 0;
1983 spin_unlock(&serial->serial_lock);
1984 if (status) {
1985 handle_usb_error(status, __func__, serial->parent);
1986 return;
1987 }
1988
1989 /* what request? */
1990 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1991 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1992 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1993 DUMP1(urb->transfer_buffer, urb->actual_length);
1994
1995 if (req->bRequestType ==
1996 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1997 /* response to a read command */
1998 serial->rx_urb_filled[0] = 1;
1999 spin_lock(&serial->serial_lock);
2000 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2001 spin_unlock(&serial->serial_lock);
2002 } else {
2003 hso_put_activity(serial->parent);
2004 tty_port_tty_wakeup(&serial->port);
2005 /* response to a write command */
2006 hso_kick_transmit(serial);
2007 }
2008 }
2009
2010 /* handle RX data for serial port */
2011 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2012 {
2013 struct tty_struct *tty;
2014 int count;
2015
2016 /* Sanity check */
2017 if (urb == NULL || serial == NULL) {
2018 hso_dbg(0x1, "serial = NULL\n");
2019 return -2;
2020 }
2021
2022 tty = tty_port_tty_get(&serial->port);
2023
2024 if (tty && tty_throttled(tty)) {
2025 tty_kref_put(tty);
2026 return -1;
2027 }
2028
2029 /* Push data to tty */
2030 hso_dbg(0x1, "data to push to tty\n");
2031 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2032 if (count >= urb->actual_length) {
2033 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2034 urb->actual_length);
2035 tty_flip_buffer_push(&serial->port);
2036 } else {
2037 dev_warn(&serial->parent->usb->dev,
2038 "dropping data, %d bytes lost\n", urb->actual_length);
2039 }
2040
2041 tty_kref_put(tty);
2042
2043 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2044
2045 return 0;
2046 }
2047
2048
2049 /* Base driver functions */
2050
2051 static void hso_log_port(struct hso_device *hso_dev)
2052 {
2053 char *port_type;
2054 char port_dev[20];
2055
2056 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2057 case HSO_PORT_CONTROL:
2058 port_type = "Control";
2059 break;
2060 case HSO_PORT_APP:
2061 port_type = "Application";
2062 break;
2063 case HSO_PORT_GPS:
2064 port_type = "GPS";
2065 break;
2066 case HSO_PORT_GPS_CONTROL:
2067 port_type = "GPS control";
2068 break;
2069 case HSO_PORT_APP2:
2070 port_type = "Application2";
2071 break;
2072 case HSO_PORT_PCSC:
2073 port_type = "PCSC";
2074 break;
2075 case HSO_PORT_DIAG:
2076 port_type = "Diagnostic";
2077 break;
2078 case HSO_PORT_DIAG2:
2079 port_type = "Diagnostic2";
2080 break;
2081 case HSO_PORT_MODEM:
2082 port_type = "Modem";
2083 break;
2084 case HSO_PORT_NETWORK:
2085 port_type = "Network";
2086 break;
2087 default:
2088 port_type = "Unknown";
2089 break;
2090 }
2091 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2092 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2093 } else
2094 sprintf(port_dev, "/dev/%s%d", tty_filename,
2095 dev2ser(hso_dev)->minor);
2096
2097 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2098 port_type, port_dev);
2099 }
2100
2101 static int hso_start_net_device(struct hso_device *hso_dev)
2102 {
2103 int i, result = 0;
2104 struct hso_net *hso_net = dev2net(hso_dev);
2105
2106 if (!hso_net)
2107 return -ENODEV;
2108
2109 /* send URBs for all read buffers */
2110 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2111
2112 /* Prep a receive URB */
2113 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2114 hso_dev->usb,
2115 usb_rcvbulkpipe(hso_dev->usb,
2116 hso_net->in_endp->
2117 bEndpointAddress & 0x7F),
2118 hso_net->mux_bulk_rx_buf_pool[i],
2119 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2120 hso_net);
2121
2122 /* Put it out there so the device can send us stuff */
2123 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2124 GFP_NOIO);
2125 if (result)
2126 dev_warn(&hso_dev->usb->dev,
2127 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2128 i, result);
2129 }
2130
2131 return result;
2132 }
2133
2134 static int hso_stop_net_device(struct hso_device *hso_dev)
2135 {
2136 int i;
2137 struct hso_net *hso_net = dev2net(hso_dev);
2138
2139 if (!hso_net)
2140 return -ENODEV;
2141
2142 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2143 if (hso_net->mux_bulk_rx_urb_pool[i])
2144 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2145
2146 }
2147 if (hso_net->mux_bulk_tx_urb)
2148 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2149
2150 return 0;
2151 }
2152
2153 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2154 {
2155 int i, result = 0;
2156 struct hso_serial *serial = dev2ser(hso_dev);
2157
2158 if (!serial)
2159 return -ENODEV;
2160
2161 /* If it is not the MUX port fill in and submit a bulk urb (already
2162 * allocated in hso_serial_start) */
2163 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2164 for (i = 0; i < serial->num_rx_urbs; i++) {
2165 usb_fill_bulk_urb(serial->rx_urb[i],
2166 serial->parent->usb,
2167 usb_rcvbulkpipe(serial->parent->usb,
2168 serial->in_endp->
2169 bEndpointAddress &
2170 0x7F),
2171 serial->rx_data[i],
2172 serial->rx_data_length,
2173 hso_std_serial_read_bulk_callback,
2174 serial);
2175 result = usb_submit_urb(serial->rx_urb[i], flags);
2176 if (result) {
2177 dev_warn(&serial->parent->usb->dev,
2178 "Failed to submit urb - res %d\n",
2179 result);
2180 break;
2181 }
2182 }
2183 } else {
2184 mutex_lock(&serial->shared_int->shared_int_lock);
2185 if (!serial->shared_int->use_count) {
2186 result =
2187 hso_mux_submit_intr_urb(serial->shared_int,
2188 hso_dev->usb, flags);
2189 }
2190 serial->shared_int->use_count++;
2191 mutex_unlock(&serial->shared_int->shared_int_lock);
2192 }
2193 if (serial->tiocmget)
2194 tiocmget_submit_urb(serial,
2195 serial->tiocmget,
2196 serial->parent->usb);
2197 return result;
2198 }
2199
2200 static int hso_stop_serial_device(struct hso_device *hso_dev)
2201 {
2202 int i;
2203 struct hso_serial *serial = dev2ser(hso_dev);
2204 struct hso_tiocmget *tiocmget;
2205
2206 if (!serial)
2207 return -ENODEV;
2208
2209 for (i = 0; i < serial->num_rx_urbs; i++) {
2210 if (serial->rx_urb[i]) {
2211 usb_kill_urb(serial->rx_urb[i]);
2212 serial->rx_urb_filled[i] = 0;
2213 }
2214 }
2215 serial->curr_rx_urb_idx = 0;
2216
2217 if (serial->tx_urb)
2218 usb_kill_urb(serial->tx_urb);
2219
2220 if (serial->shared_int) {
2221 mutex_lock(&serial->shared_int->shared_int_lock);
2222 if (serial->shared_int->use_count &&
2223 (--serial->shared_int->use_count == 0)) {
2224 struct urb *urb;
2225
2226 urb = serial->shared_int->shared_intr_urb;
2227 if (urb)
2228 usb_kill_urb(urb);
2229 }
2230 mutex_unlock(&serial->shared_int->shared_int_lock);
2231 }
2232 tiocmget = serial->tiocmget;
2233 if (tiocmget) {
2234 wake_up_interruptible(&tiocmget->waitq);
2235 usb_kill_urb(tiocmget->urb);
2236 }
2237
2238 return 0;
2239 }
2240
2241 static void hso_serial_tty_unregister(struct hso_serial *serial)
2242 {
2243 tty_unregister_device(tty_drv, serial->minor);
2244 }
2245
2246 static void hso_serial_common_free(struct hso_serial *serial)
2247 {
2248 int i;
2249
2250 for (i = 0; i < serial->num_rx_urbs; i++) {
2251 /* unlink and free RX URB */
2252 usb_free_urb(serial->rx_urb[i]);
2253 /* free the RX buffer */
2254 kfree(serial->rx_data[i]);
2255 }
2256
2257 /* unlink and free TX URB */
2258 usb_free_urb(serial->tx_urb);
2259 kfree(serial->tx_buffer);
2260 kfree(serial->tx_data);
2261 tty_port_destroy(&serial->port);
2262 }
2263
2264 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2265 int rx_size, int tx_size)
2266 {
2267 struct device *dev;
2268 int minor;
2269 int i;
2270
2271 tty_port_init(&serial->port);
2272
2273 minor = get_free_serial_index();
2274 if (minor < 0)
2275 goto exit;
2276
2277 /* register our minor number */
2278 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2279 tty_drv, minor, &serial->parent->interface->dev,
2280 serial->parent, hso_serial_dev_groups);
2281 dev = serial->parent->dev;
2282
2283 /* fill in specific data for later use */
2284 serial->minor = minor;
2285 serial->magic = HSO_SERIAL_MAGIC;
2286 spin_lock_init(&serial->serial_lock);
2287 serial->num_rx_urbs = num_urbs;
2288
2289 /* RX, allocate urb and initialize */
2290
2291 /* prepare our RX buffer */
2292 serial->rx_data_length = rx_size;
2293 for (i = 0; i < serial->num_rx_urbs; i++) {
2294 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2295 if (!serial->rx_urb[i])
2296 goto exit;
2297 serial->rx_urb[i]->transfer_buffer = NULL;
2298 serial->rx_urb[i]->transfer_buffer_length = 0;
2299 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2300 GFP_KERNEL);
2301 if (!serial->rx_data[i])
2302 goto exit;
2303 }
2304
2305 /* TX, allocate urb and initialize */
2306 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2307 if (!serial->tx_urb)
2308 goto exit;
2309 serial->tx_urb->transfer_buffer = NULL;
2310 serial->tx_urb->transfer_buffer_length = 0;
2311 /* prepare our TX buffer */
2312 serial->tx_data_count = 0;
2313 serial->tx_buffer_count = 0;
2314 serial->tx_data_length = tx_size;
2315 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2316 if (!serial->tx_data)
2317 goto exit;
2318
2319 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2320 if (!serial->tx_buffer)
2321 goto exit;
2322
2323 return 0;
2324 exit:
2325 hso_serial_tty_unregister(serial);
2326 hso_serial_common_free(serial);
2327 return -1;
2328 }
2329
2330 /* Creates a general hso device */
2331 static struct hso_device *hso_create_device(struct usb_interface *intf,
2332 int port_spec)
2333 {
2334 struct hso_device *hso_dev;
2335
2336 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2337 if (!hso_dev)
2338 return NULL;
2339
2340 hso_dev->port_spec = port_spec;
2341 hso_dev->usb = interface_to_usbdev(intf);
2342 hso_dev->interface = intf;
2343 kref_init(&hso_dev->ref);
2344 mutex_init(&hso_dev->mutex);
2345
2346 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2347 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2348
2349 return hso_dev;
2350 }
2351
2352 /* Removes a network device in the network device table */
2353 static int remove_net_device(struct hso_device *hso_dev)
2354 {
2355 int i;
2356
2357 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2358 if (network_table[i] == hso_dev) {
2359 network_table[i] = NULL;
2360 break;
2361 }
2362 }
2363 if (i == HSO_MAX_NET_DEVICES)
2364 return -1;
2365 return 0;
2366 }
2367
2368 /* Frees our network device */
2369 static void hso_free_net_device(struct hso_device *hso_dev)
2370 {
2371 int i;
2372 struct hso_net *hso_net = dev2net(hso_dev);
2373
2374 if (!hso_net)
2375 return;
2376
2377 remove_net_device(hso_net->parent);
2378
2379 if (hso_net->net)
2380 unregister_netdev(hso_net->net);
2381
2382 /* start freeing */
2383 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2384 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2385 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2386 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2387 }
2388 usb_free_urb(hso_net->mux_bulk_tx_urb);
2389 kfree(hso_net->mux_bulk_tx_buf);
2390 hso_net->mux_bulk_tx_buf = NULL;
2391
2392 if (hso_net->net)
2393 free_netdev(hso_net->net);
2394
2395 kfree(hso_dev);
2396 }
2397
2398 static const struct net_device_ops hso_netdev_ops = {
2399 .ndo_open = hso_net_open,
2400 .ndo_stop = hso_net_close,
2401 .ndo_start_xmit = hso_net_start_xmit,
2402 .ndo_tx_timeout = hso_net_tx_timeout,
2403 };
2404
2405 /* initialize the network interface */
2406 static void hso_net_init(struct net_device *net)
2407 {
2408 struct hso_net *hso_net = netdev_priv(net);
2409
2410 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2411
2412 /* fill in the other fields */
2413 net->netdev_ops = &hso_netdev_ops;
2414 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2415 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2416 net->type = ARPHRD_NONE;
2417 net->mtu = DEFAULT_MTU - 14;
2418 net->tx_queue_len = 10;
2419 net->ethtool_ops = &ops;
2420
2421 /* and initialize the semaphore */
2422 spin_lock_init(&hso_net->net_lock);
2423 }
2424
2425 /* Adds a network device in the network device table */
2426 static int add_net_device(struct hso_device *hso_dev)
2427 {
2428 int i;
2429
2430 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2431 if (network_table[i] == NULL) {
2432 network_table[i] = hso_dev;
2433 break;
2434 }
2435 }
2436 if (i == HSO_MAX_NET_DEVICES)
2437 return -1;
2438 return 0;
2439 }
2440
2441 static int hso_rfkill_set_block(void *data, bool blocked)
2442 {
2443 struct hso_device *hso_dev = data;
2444 int enabled = !blocked;
2445 int rv;
2446
2447 mutex_lock(&hso_dev->mutex);
2448 if (hso_dev->usb_gone)
2449 rv = 0;
2450 else
2451 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2452 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2453 USB_CTRL_SET_TIMEOUT);
2454 mutex_unlock(&hso_dev->mutex);
2455 return rv;
2456 }
2457
2458 static const struct rfkill_ops hso_rfkill_ops = {
2459 .set_block = hso_rfkill_set_block,
2460 };
2461
2462 /* Creates and sets up everything for rfkill */
2463 static void hso_create_rfkill(struct hso_device *hso_dev,
2464 struct usb_interface *interface)
2465 {
2466 struct hso_net *hso_net = dev2net(hso_dev);
2467 struct device *dev = &hso_net->net->dev;
2468 static u32 rfkill_counter;
2469
2470 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2471 rfkill_counter++);
2472
2473 hso_net->rfkill = rfkill_alloc(hso_net->name,
2474 &interface_to_usbdev(interface)->dev,
2475 RFKILL_TYPE_WWAN,
2476 &hso_rfkill_ops, hso_dev);
2477 if (!hso_net->rfkill) {
2478 dev_err(dev, "%s - Out of memory\n", __func__);
2479 return;
2480 }
2481 if (rfkill_register(hso_net->rfkill) < 0) {
2482 rfkill_destroy(hso_net->rfkill);
2483 hso_net->rfkill = NULL;
2484 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2485 return;
2486 }
2487 }
2488
2489 static struct device_type hso_type = {
2490 .name = "wwan",
2491 };
2492
2493 /* Creates our network device */
2494 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2495 int port_spec)
2496 {
2497 int result, i;
2498 struct net_device *net;
2499 struct hso_net *hso_net;
2500 struct hso_device *hso_dev;
2501
2502 hso_dev = hso_create_device(interface, port_spec);
2503 if (!hso_dev)
2504 return NULL;
2505
2506 /* allocate our network device, then we can put in our private data */
2507 /* call hso_net_init to do the basic initialization */
2508 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2509 hso_net_init);
2510 if (!net) {
2511 dev_err(&interface->dev, "Unable to create ethernet device\n");
2512 goto exit;
2513 }
2514
2515 hso_net = netdev_priv(net);
2516
2517 hso_dev->port_data.dev_net = hso_net;
2518 hso_net->net = net;
2519 hso_net->parent = hso_dev;
2520
2521 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2522 USB_DIR_IN);
2523 if (!hso_net->in_endp) {
2524 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2525 goto exit;
2526 }
2527 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2528 USB_DIR_OUT);
2529 if (!hso_net->out_endp) {
2530 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2531 goto exit;
2532 }
2533 SET_NETDEV_DEV(net, &interface->dev);
2534 SET_NETDEV_DEVTYPE(net, &hso_type);
2535
2536 /* start allocating */
2537 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2538 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2539 if (!hso_net->mux_bulk_rx_urb_pool[i])
2540 goto exit;
2541 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2542 GFP_KERNEL);
2543 if (!hso_net->mux_bulk_rx_buf_pool[i])
2544 goto exit;
2545 }
2546 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2547 if (!hso_net->mux_bulk_tx_urb)
2548 goto exit;
2549 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2550 if (!hso_net->mux_bulk_tx_buf)
2551 goto exit;
2552
2553 add_net_device(hso_dev);
2554
2555 /* registering our net device */
2556 result = register_netdev(net);
2557 if (result) {
2558 dev_err(&interface->dev, "Failed to register device\n");
2559 goto exit;
2560 }
2561
2562 hso_log_port(hso_dev);
2563
2564 hso_create_rfkill(hso_dev, interface);
2565
2566 return hso_dev;
2567 exit:
2568 hso_free_net_device(hso_dev);
2569 return NULL;
2570 }
2571
2572 static void hso_free_tiomget(struct hso_serial *serial)
2573 {
2574 struct hso_tiocmget *tiocmget;
2575 if (!serial)
2576 return;
2577 tiocmget = serial->tiocmget;
2578 if (tiocmget) {
2579 usb_free_urb(tiocmget->urb);
2580 tiocmget->urb = NULL;
2581 serial->tiocmget = NULL;
2582 kfree(tiocmget);
2583 }
2584 }
2585
2586 /* Frees an AT channel ( goes for both mux and non-mux ) */
2587 static void hso_free_serial_device(struct hso_device *hso_dev)
2588 {
2589 struct hso_serial *serial = dev2ser(hso_dev);
2590
2591 if (!serial)
2592 return;
2593
2594 hso_serial_common_free(serial);
2595
2596 if (serial->shared_int) {
2597 mutex_lock(&serial->shared_int->shared_int_lock);
2598 if (--serial->shared_int->ref_count == 0)
2599 hso_free_shared_int(serial->shared_int);
2600 else
2601 mutex_unlock(&serial->shared_int->shared_int_lock);
2602 }
2603 hso_free_tiomget(serial);
2604 kfree(serial);
2605 kfree(hso_dev);
2606 }
2607
2608 /* Creates a bulk AT channel */
2609 static struct hso_device *hso_create_bulk_serial_device(
2610 struct usb_interface *interface, int port)
2611 {
2612 struct hso_device *hso_dev;
2613 struct hso_serial *serial;
2614 int num_urbs;
2615 struct hso_tiocmget *tiocmget;
2616
2617 hso_dev = hso_create_device(interface, port);
2618 if (!hso_dev)
2619 return NULL;
2620
2621 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2622 if (!serial)
2623 goto exit;
2624
2625 serial->parent = hso_dev;
2626 hso_dev->port_data.dev_serial = serial;
2627
2628 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2629 num_urbs = 2;
2630 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2631 GFP_KERNEL);
2632 /* it isn't going to break our heart if serial->tiocmget
2633 * allocation fails don't bother checking this.
2634 */
2635 if (serial->tiocmget) {
2636 tiocmget = serial->tiocmget;
2637 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2638 if (tiocmget->urb) {
2639 mutex_init(&tiocmget->mutex);
2640 init_waitqueue_head(&tiocmget->waitq);
2641 tiocmget->endp = hso_get_ep(
2642 interface,
2643 USB_ENDPOINT_XFER_INT,
2644 USB_DIR_IN);
2645 } else
2646 hso_free_tiomget(serial);
2647 }
2648 }
2649 else
2650 num_urbs = 1;
2651
2652 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2653 BULK_URB_TX_SIZE))
2654 goto exit;
2655
2656 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2657 USB_DIR_IN);
2658 if (!serial->in_endp) {
2659 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2660 goto exit2;
2661 }
2662
2663 if (!
2664 (serial->out_endp =
2665 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2666 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2667 goto exit2;
2668 }
2669
2670 serial->write_data = hso_std_serial_write_data;
2671
2672 /* and record this serial */
2673 set_serial_by_index(serial->minor, serial);
2674
2675 /* setup the proc dirs and files if needed */
2676 hso_log_port(hso_dev);
2677
2678 /* done, return it */
2679 return hso_dev;
2680
2681 exit2:
2682 hso_serial_tty_unregister(serial);
2683 hso_serial_common_free(serial);
2684 exit:
2685 hso_free_tiomget(serial);
2686 kfree(serial);
2687 kfree(hso_dev);
2688 return NULL;
2689 }
2690
2691 /* Creates a multiplexed AT channel */
2692 static
2693 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2694 int port,
2695 struct hso_shared_int *mux)
2696 {
2697 struct hso_device *hso_dev;
2698 struct hso_serial *serial;
2699 int port_spec;
2700
2701 port_spec = HSO_INTF_MUX;
2702 port_spec &= ~HSO_PORT_MASK;
2703
2704 port_spec |= hso_mux_to_port(port);
2705 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2706 return NULL;
2707
2708 hso_dev = hso_create_device(interface, port_spec);
2709 if (!hso_dev)
2710 return NULL;
2711
2712 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2713 if (!serial)
2714 goto exit;
2715
2716 hso_dev->port_data.dev_serial = serial;
2717 serial->parent = hso_dev;
2718
2719 if (hso_serial_common_create
2720 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2721 goto exit;
2722
2723 serial->tx_data_length--;
2724 serial->write_data = hso_mux_serial_write_data;
2725
2726 serial->shared_int = mux;
2727 mutex_lock(&serial->shared_int->shared_int_lock);
2728 serial->shared_int->ref_count++;
2729 mutex_unlock(&serial->shared_int->shared_int_lock);
2730
2731 /* and record this serial */
2732 set_serial_by_index(serial->minor, serial);
2733
2734 /* setup the proc dirs and files if needed */
2735 hso_log_port(hso_dev);
2736
2737 /* done, return it */
2738 return hso_dev;
2739
2740 exit:
2741 if (serial) {
2742 tty_unregister_device(tty_drv, serial->minor);
2743 kfree(serial);
2744 }
2745 kfree(hso_dev);
2746 return NULL;
2747
2748 }
2749
2750 static void hso_free_shared_int(struct hso_shared_int *mux)
2751 {
2752 usb_free_urb(mux->shared_intr_urb);
2753 kfree(mux->shared_intr_buf);
2754 mutex_unlock(&mux->shared_int_lock);
2755 kfree(mux);
2756 }
2757
2758 static
2759 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2760 {
2761 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2762
2763 if (!mux)
2764 return NULL;
2765
2766 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2767 USB_DIR_IN);
2768 if (!mux->intr_endp) {
2769 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2770 goto exit;
2771 }
2772
2773 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2774 if (!mux->shared_intr_urb)
2775 goto exit;
2776 mux->shared_intr_buf =
2777 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2778 GFP_KERNEL);
2779 if (!mux->shared_intr_buf)
2780 goto exit;
2781
2782 mutex_init(&mux->shared_int_lock);
2783
2784 return mux;
2785
2786 exit:
2787 kfree(mux->shared_intr_buf);
2788 usb_free_urb(mux->shared_intr_urb);
2789 kfree(mux);
2790 return NULL;
2791 }
2792
2793 /* Gets the port spec for a certain interface */
2794 static int hso_get_config_data(struct usb_interface *interface)
2795 {
2796 struct usb_device *usbdev = interface_to_usbdev(interface);
2797 u8 *config_data = kmalloc(17, GFP_KERNEL);
2798 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2799 s32 result;
2800
2801 if (!config_data)
2802 return -ENOMEM;
2803 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2804 0x86, 0xC0, 0, 0, config_data, 17,
2805 USB_CTRL_SET_TIMEOUT) != 0x11) {
2806 kfree(config_data);
2807 return -EIO;
2808 }
2809
2810 switch (config_data[if_num]) {
2811 case 0x0:
2812 result = 0;
2813 break;
2814 case 0x1:
2815 result = HSO_PORT_DIAG;
2816 break;
2817 case 0x2:
2818 result = HSO_PORT_GPS;
2819 break;
2820 case 0x3:
2821 result = HSO_PORT_GPS_CONTROL;
2822 break;
2823 case 0x4:
2824 result = HSO_PORT_APP;
2825 break;
2826 case 0x5:
2827 result = HSO_PORT_APP2;
2828 break;
2829 case 0x6:
2830 result = HSO_PORT_CONTROL;
2831 break;
2832 case 0x7:
2833 result = HSO_PORT_NETWORK;
2834 break;
2835 case 0x8:
2836 result = HSO_PORT_MODEM;
2837 break;
2838 case 0x9:
2839 result = HSO_PORT_MSD;
2840 break;
2841 case 0xa:
2842 result = HSO_PORT_PCSC;
2843 break;
2844 case 0xb:
2845 result = HSO_PORT_VOICE;
2846 break;
2847 default:
2848 result = 0;
2849 }
2850
2851 if (result)
2852 result |= HSO_INTF_BULK;
2853
2854 if (config_data[16] & 0x1)
2855 result |= HSO_INFO_CRC_BUG;
2856
2857 kfree(config_data);
2858 return result;
2859 }
2860
2861 /* called once for each interface upon device insertion */
2862 static int hso_probe(struct usb_interface *interface,
2863 const struct usb_device_id *id)
2864 {
2865 int mux, i, if_num, port_spec;
2866 unsigned char port_mask;
2867 struct hso_device *hso_dev = NULL;
2868 struct hso_shared_int *shared_int;
2869 struct hso_device *tmp_dev = NULL;
2870
2871 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2872 dev_err(&interface->dev, "Not our interface\n");
2873 return -ENODEV;
2874 }
2875
2876 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2877
2878 /* Get the interface/port specification from either driver_info or from
2879 * the device itself */
2880 if (id->driver_info)
2881 port_spec = ((u32 *)(id->driver_info))[if_num];
2882 else
2883 port_spec = hso_get_config_data(interface);
2884
2885 /* Check if we need to switch to alt interfaces prior to port
2886 * configuration */
2887 if (interface->num_altsetting > 1)
2888 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2889 interface->needs_remote_wakeup = 1;
2890
2891 /* Allocate new hso device(s) */
2892 switch (port_spec & HSO_INTF_MASK) {
2893 case HSO_INTF_MUX:
2894 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2895 /* Create the network device */
2896 if (!disable_net) {
2897 hso_dev = hso_create_net_device(interface,
2898 port_spec);
2899 if (!hso_dev)
2900 goto exit;
2901 tmp_dev = hso_dev;
2902 }
2903 }
2904
2905 if (hso_get_mux_ports(interface, &port_mask))
2906 /* TODO: de-allocate everything */
2907 goto exit;
2908
2909 shared_int = hso_create_shared_int(interface);
2910 if (!shared_int)
2911 goto exit;
2912
2913 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2914 if (port_mask & i) {
2915 hso_dev = hso_create_mux_serial_device(
2916 interface, i, shared_int);
2917 if (!hso_dev)
2918 goto exit;
2919 }
2920 }
2921
2922 if (tmp_dev)
2923 hso_dev = tmp_dev;
2924 break;
2925
2926 case HSO_INTF_BULK:
2927 /* It's a regular bulk interface */
2928 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2929 if (!disable_net)
2930 hso_dev =
2931 hso_create_net_device(interface, port_spec);
2932 } else {
2933 hso_dev =
2934 hso_create_bulk_serial_device(interface, port_spec);
2935 }
2936 if (!hso_dev)
2937 goto exit;
2938 break;
2939 default:
2940 goto exit;
2941 }
2942
2943 /* save our data pointer in this device */
2944 usb_set_intfdata(interface, hso_dev);
2945
2946 /* done */
2947 return 0;
2948 exit:
2949 hso_free_interface(interface);
2950 return -ENODEV;
2951 }
2952
2953 /* device removed, cleaning up */
2954 static void hso_disconnect(struct usb_interface *interface)
2955 {
2956 hso_free_interface(interface);
2957
2958 /* remove reference of our private data */
2959 usb_set_intfdata(interface, NULL);
2960 }
2961
2962 static void async_get_intf(struct work_struct *data)
2963 {
2964 struct hso_device *hso_dev =
2965 container_of(data, struct hso_device, async_get_intf);
2966 usb_autopm_get_interface(hso_dev->interface);
2967 }
2968
2969 static void async_put_intf(struct work_struct *data)
2970 {
2971 struct hso_device *hso_dev =
2972 container_of(data, struct hso_device, async_put_intf);
2973 usb_autopm_put_interface(hso_dev->interface);
2974 }
2975
2976 static int hso_get_activity(struct hso_device *hso_dev)
2977 {
2978 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2979 if (!hso_dev->is_active) {
2980 hso_dev->is_active = 1;
2981 schedule_work(&hso_dev->async_get_intf);
2982 }
2983 }
2984
2985 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2986 return -EAGAIN;
2987
2988 usb_mark_last_busy(hso_dev->usb);
2989
2990 return 0;
2991 }
2992
2993 static int hso_put_activity(struct hso_device *hso_dev)
2994 {
2995 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2996 if (hso_dev->is_active) {
2997 hso_dev->is_active = 0;
2998 schedule_work(&hso_dev->async_put_intf);
2999 return -EAGAIN;
3000 }
3001 }
3002 hso_dev->is_active = 0;
3003 return 0;
3004 }
3005
3006 /* called by kernel when we need to suspend device */
3007 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3008 {
3009 int i, result;
3010
3011 /* Stop all serial ports */
3012 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3013 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3014 result = hso_stop_serial_device(serial_table[i]);
3015 if (result)
3016 goto out;
3017 }
3018 }
3019
3020 /* Stop all network ports */
3021 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3022 if (network_table[i] &&
3023 (network_table[i]->interface == iface)) {
3024 result = hso_stop_net_device(network_table[i]);
3025 if (result)
3026 goto out;
3027 }
3028 }
3029
3030 out:
3031 return 0;
3032 }
3033
3034 /* called by kernel when we need to resume device */
3035 static int hso_resume(struct usb_interface *iface)
3036 {
3037 int i, result = 0;
3038 struct hso_net *hso_net;
3039
3040 /* Start all serial ports */
3041 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3042 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3043 if (dev2ser(serial_table[i])->port.count) {
3044 result =
3045 hso_start_serial_device(serial_table[i], GFP_NOIO);
3046 hso_kick_transmit(dev2ser(serial_table[i]));
3047 if (result)
3048 goto out;
3049 }
3050 }
3051 }
3052
3053 /* Start all network ports */
3054 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3055 if (network_table[i] &&
3056 (network_table[i]->interface == iface)) {
3057 hso_net = dev2net(network_table[i]);
3058 if (hso_net->flags & IFF_UP) {
3059 /* First transmit any lingering data,
3060 then restart the device. */
3061 if (hso_net->skb_tx_buf) {
3062 dev_dbg(&iface->dev,
3063 "Transmitting"
3064 " lingering data\n");
3065 hso_net_start_xmit(hso_net->skb_tx_buf,
3066 hso_net->net);
3067 hso_net->skb_tx_buf = NULL;
3068 }
3069 result = hso_start_net_device(network_table[i]);
3070 if (result)
3071 goto out;
3072 }
3073 }
3074 }
3075
3076 out:
3077 return result;
3078 }
3079
3080 static void hso_serial_ref_free(struct kref *ref)
3081 {
3082 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3083
3084 hso_free_serial_device(hso_dev);
3085 }
3086
3087 static void hso_free_interface(struct usb_interface *interface)
3088 {
3089 struct hso_serial *serial;
3090 int i;
3091
3092 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3093 if (serial_table[i] &&
3094 (serial_table[i]->interface == interface)) {
3095 serial = dev2ser(serial_table[i]);
3096 tty_port_tty_hangup(&serial->port, false);
3097 mutex_lock(&serial->parent->mutex);
3098 serial->parent->usb_gone = 1;
3099 mutex_unlock(&serial->parent->mutex);
3100 cancel_work_sync(&serial_table[i]->async_put_intf);
3101 cancel_work_sync(&serial_table[i]->async_get_intf);
3102 hso_serial_tty_unregister(serial);
3103 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3104 set_serial_by_index(i, NULL);
3105 }
3106 }
3107
3108 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3109 if (network_table[i] &&
3110 (network_table[i]->interface == interface)) {
3111 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3112 /* hso_stop_net_device doesn't stop the net queue since
3113 * traffic needs to start it again when suspended */
3114 netif_stop_queue(dev2net(network_table[i])->net);
3115 hso_stop_net_device(network_table[i]);
3116 cancel_work_sync(&network_table[i]->async_put_intf);
3117 cancel_work_sync(&network_table[i]->async_get_intf);
3118 if (rfk) {
3119 rfkill_unregister(rfk);
3120 rfkill_destroy(rfk);
3121 }
3122 hso_free_net_device(network_table[i]);
3123 }
3124 }
3125 }
3126
3127 /* Helper functions */
3128
3129 /* Get the endpoint ! */
3130 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3131 int type, int dir)
3132 {
3133 int i;
3134 struct usb_host_interface *iface = intf->cur_altsetting;
3135 struct usb_endpoint_descriptor *endp;
3136
3137 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3138 endp = &iface->endpoint[i].desc;
3139 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3140 (usb_endpoint_type(endp) == type))
3141 return endp;
3142 }
3143
3144 return NULL;
3145 }
3146
3147 /* Get the byte that describes which ports are enabled */
3148 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3149 {
3150 int i;
3151 struct usb_host_interface *iface = intf->cur_altsetting;
3152
3153 if (iface->extralen == 3) {
3154 *ports = iface->extra[2];
3155 return 0;
3156 }
3157
3158 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3159 if (iface->endpoint[i].extralen == 3) {
3160 *ports = iface->endpoint[i].extra[2];
3161 return 0;
3162 }
3163 }
3164
3165 return -1;
3166 }
3167
3168 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3169 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3170 struct usb_device *usb, gfp_t gfp)
3171 {
3172 int result;
3173
3174 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3175 usb_rcvintpipe(usb,
3176 shared_int->intr_endp->bEndpointAddress & 0x7F),
3177 shared_int->shared_intr_buf,
3178 1,
3179 intr_callback, shared_int,
3180 shared_int->intr_endp->bInterval);
3181
3182 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3183 if (result)
3184 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3185 result);
3186
3187 return result;
3188 }
3189
3190 /* operations setup of the serial interface */
3191 static const struct tty_operations hso_serial_ops = {
3192 .open = hso_serial_open,
3193 .close = hso_serial_close,
3194 .write = hso_serial_write,
3195 .write_room = hso_serial_write_room,
3196 .cleanup = hso_serial_cleanup,
3197 .ioctl = hso_serial_ioctl,
3198 .set_termios = hso_serial_set_termios,
3199 .chars_in_buffer = hso_serial_chars_in_buffer,
3200 .tiocmget = hso_serial_tiocmget,
3201 .tiocmset = hso_serial_tiocmset,
3202 .get_icount = hso_get_count,
3203 .unthrottle = hso_unthrottle
3204 };
3205
3206 static struct usb_driver hso_driver = {
3207 .name = driver_name,
3208 .probe = hso_probe,
3209 .disconnect = hso_disconnect,
3210 .id_table = hso_ids,
3211 .suspend = hso_suspend,
3212 .resume = hso_resume,
3213 .reset_resume = hso_resume,
3214 .supports_autosuspend = 1,
3215 .disable_hub_initiated_lpm = 1,
3216 };
3217
3218 static int __init hso_init(void)
3219 {
3220 int i;
3221 int result;
3222
3223 /* put it in the log */
3224 pr_info("%s\n", version);
3225
3226 /* Initialise the serial table semaphore and table */
3227 spin_lock_init(&serial_table_lock);
3228 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3229 serial_table[i] = NULL;
3230
3231 /* allocate our driver using the proper amount of supported minors */
3232 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3233 if (!tty_drv)
3234 return -ENOMEM;
3235
3236 /* fill in all needed values */
3237 tty_drv->driver_name = driver_name;
3238 tty_drv->name = tty_filename;
3239
3240 /* if major number is provided as parameter, use that one */
3241 if (tty_major)
3242 tty_drv->major = tty_major;
3243
3244 tty_drv->minor_start = 0;
3245 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3246 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3247 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3248 tty_drv->init_termios = tty_std_termios;
3249 hso_init_termios(&tty_drv->init_termios);
3250 tty_set_operations(tty_drv, &hso_serial_ops);
3251
3252 /* register the tty driver */
3253 result = tty_register_driver(tty_drv);
3254 if (result) {
3255 pr_err("%s - tty_register_driver failed(%d)\n",
3256 __func__, result);
3257 goto err_free_tty;
3258 }
3259
3260 /* register this module as an usb driver */
3261 result = usb_register(&hso_driver);
3262 if (result) {
3263 pr_err("Could not register hso driver - error: %d\n", result);
3264 goto err_unreg_tty;
3265 }
3266
3267 /* done */
3268 return 0;
3269 err_unreg_tty:
3270 tty_unregister_driver(tty_drv);
3271 err_free_tty:
3272 put_tty_driver(tty_drv);
3273 return result;
3274 }
3275
3276 static void __exit hso_exit(void)
3277 {
3278 pr_info("unloaded\n");
3279
3280 tty_unregister_driver(tty_drv);
3281 /* deregister the usb driver */
3282 usb_deregister(&hso_driver);
3283 put_tty_driver(tty_drv);
3284 }
3285
3286 /* Module definitions */
3287 module_init(hso_init);
3288 module_exit(hso_exit);
3289
3290 MODULE_AUTHOR(MOD_AUTHOR);
3291 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3292 MODULE_LICENSE(MOD_LICENSE);
3293
3294 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3295 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3296 module_param(debug, int, S_IRUGO | S_IWUSR);
3297
3298 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3299 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3300 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3301
3302 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3303 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3304 module_param(disable_net, int, S_IRUGO | S_IWUSR);
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