]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/net/usb/hso.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
UBUNTU: Start new release
[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
865 /* log if needed */
866 hso_dbg(0x1, "Rx %d bytes\n", count);
867 DUMP(ip_pkt, min(128, (int)count));
868
869 while (count) {
870 switch (odev->rx_parse_state) {
871 case WAIT_IP:
872 /* waiting for IP header. */
873 /* wanted bytes - size of ip header */
874 temp_bytes =
875 (count <
876 odev->rx_buf_missing) ? count : odev->
877 rx_buf_missing;
878
879 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
880 odev->rx_buf_size, ip_pkt + buffer_offset,
881 temp_bytes);
882
883 odev->rx_buf_size += temp_bytes;
884 buffer_offset += temp_bytes;
885 odev->rx_buf_missing -= temp_bytes;
886 count -= temp_bytes;
887
888 if (!odev->rx_buf_missing) {
889 /* header is complete allocate an sk_buffer and
890 * continue to WAIT_DATA */
891 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
892
893 if ((frame_len > DEFAULT_MRU) ||
894 (frame_len < sizeof(struct iphdr))) {
895 dev_err(&odev->net->dev,
896 "Invalid frame (%d) length\n",
897 frame_len);
898 odev->rx_parse_state = WAIT_SYNC;
899 continue;
900 }
901 /* Allocate an sk_buff */
902 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
903 frame_len);
904 if (!odev->skb_rx_buf) {
905 /* We got no receive buffer. */
906 hso_dbg(0x1, "could not allocate memory\n");
907 odev->rx_parse_state = WAIT_SYNC;
908 continue;
909 }
910
911 /* Copy what we got so far. make room for iphdr
912 * after tail. */
913 skb_put_data(odev->skb_rx_buf,
914 (char *)&(odev->rx_ip_hdr),
915 sizeof(struct iphdr));
916
917 /* ETH_HLEN */
918 odev->rx_buf_size = sizeof(struct iphdr);
919
920 /* Filip actually use .tot_len */
921 odev->rx_buf_missing =
922 frame_len - sizeof(struct iphdr);
923 odev->rx_parse_state = WAIT_DATA;
924 }
925 break;
926
927 case WAIT_DATA:
928 temp_bytes = (count < odev->rx_buf_missing)
929 ? count : odev->rx_buf_missing;
930
931 /* Copy the rest of the bytes that are left in the
932 * buffer into the waiting sk_buf. */
933 /* Make room for temp_bytes after tail. */
934 skb_put_data(odev->skb_rx_buf,
935 ip_pkt + buffer_offset,
936 temp_bytes);
937
938 odev->rx_buf_missing -= temp_bytes;
939 count -= temp_bytes;
940 buffer_offset += temp_bytes;
941 odev->rx_buf_size += temp_bytes;
942 if (!odev->rx_buf_missing) {
943 /* Packet is complete. Inject into stack. */
944 /* We have IP packet here */
945 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
946 skb_reset_mac_header(odev->skb_rx_buf);
947
948 /* Ship it off to the kernel */
949 netif_rx(odev->skb_rx_buf);
950 /* No longer our buffer. */
951 odev->skb_rx_buf = NULL;
952
953 /* update out statistics */
954 odev->net->stats.rx_packets++;
955
956 odev->net->stats.rx_bytes += odev->rx_buf_size;
957
958 odev->rx_buf_size = 0;
959 odev->rx_buf_missing = sizeof(struct iphdr);
960 odev->rx_parse_state = WAIT_IP;
961 }
962 break;
963
964 case WAIT_SYNC:
965 hso_dbg(0x1, " W_S\n");
966 count = 0;
967 break;
968 default:
969 hso_dbg(0x1, "\n");
970 count--;
971 break;
972 }
973 }
974
975 /* Recovery mechanism for WAIT_SYNC state. */
976 if (is_eop) {
977 if (odev->rx_parse_state == WAIT_SYNC) {
978 odev->rx_parse_state = WAIT_IP;
979 odev->rx_buf_size = 0;
980 odev->rx_buf_missing = sizeof(struct iphdr);
981 }
982 }
983 }
984
985 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
986 {
987 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
988 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
989
990 if (((rest == 5) || (rest == 6)) &&
991 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
992 crc_check, 4)) {
993 urb->actual_length -= 4;
994 }
995 }
996
997 /* Moving data from usb to kernel (in interrupt state) */
998 static void read_bulk_callback(struct urb *urb)
999 {
1000 struct hso_net *odev = urb->context;
1001 struct net_device *net;
1002 int result;
1003 int status = urb->status;
1004
1005 /* is al ok? (Filip: Who's Al ?) */
1006 if (status) {
1007 handle_usb_error(status, __func__, odev->parent);
1008 return;
1009 }
1010
1011 /* Sanity check */
1012 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1013 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
1014 return;
1015 }
1016 usb_mark_last_busy(urb->dev);
1017
1018 net = odev->net;
1019
1020 if (!netif_device_present(net)) {
1021 /* Somebody killed our network interface... */
1022 return;
1023 }
1024
1025 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1026 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1027
1028 /* do we even have a packet? */
1029 if (urb->actual_length) {
1030 /* Handle the IP stream, add header and push it onto network
1031 * stack if the packet is complete. */
1032 spin_lock(&odev->net_lock);
1033 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1034 (urb->transfer_buffer_length >
1035 urb->actual_length) ? 1 : 0);
1036 spin_unlock(&odev->net_lock);
1037 }
1038
1039 /* We are done with this URB, resubmit it. Prep the USB to wait for
1040 * another frame. Reuse same as received. */
1041 usb_fill_bulk_urb(urb,
1042 odev->parent->usb,
1043 usb_rcvbulkpipe(odev->parent->usb,
1044 odev->in_endp->
1045 bEndpointAddress & 0x7F),
1046 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1047 read_bulk_callback, odev);
1048
1049 /* Give this to the USB subsystem so it can tell us when more data
1050 * arrives. */
1051 result = usb_submit_urb(urb, GFP_ATOMIC);
1052 if (result)
1053 dev_warn(&odev->parent->interface->dev,
1054 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1055 result);
1056 }
1057
1058 /* Serial driver functions */
1059
1060 static void hso_init_termios(struct ktermios *termios)
1061 {
1062 /*
1063 * The default requirements for this device are:
1064 */
1065 termios->c_iflag &=
1066 ~(IGNBRK /* disable ignore break */
1067 | BRKINT /* disable break causes interrupt */
1068 | PARMRK /* disable mark parity errors */
1069 | ISTRIP /* disable clear high bit of input characters */
1070 | INLCR /* disable translate NL to CR */
1071 | IGNCR /* disable ignore CR */
1072 | ICRNL /* disable translate CR to NL */
1073 | IXON); /* disable enable XON/XOFF flow control */
1074
1075 /* disable postprocess output characters */
1076 termios->c_oflag &= ~OPOST;
1077
1078 termios->c_lflag &=
1079 ~(ECHO /* disable echo input characters */
1080 | ECHONL /* disable echo new line */
1081 | ICANON /* disable erase, kill, werase, and rprnt
1082 special characters */
1083 | ISIG /* disable interrupt, quit, and suspend special
1084 characters */
1085 | IEXTEN); /* disable non-POSIX special characters */
1086
1087 termios->c_cflag &=
1088 ~(CSIZE /* no size */
1089 | PARENB /* disable parity bit */
1090 | CBAUD /* clear current baud rate */
1091 | CBAUDEX); /* clear current buad rate */
1092
1093 termios->c_cflag |= CS8; /* character size 8 bits */
1094
1095 /* baud rate 115200 */
1096 tty_termios_encode_baud_rate(termios, 115200, 115200);
1097 }
1098
1099 static void _hso_serial_set_termios(struct tty_struct *tty,
1100 struct ktermios *old)
1101 {
1102 struct hso_serial *serial = tty->driver_data;
1103
1104 if (!serial) {
1105 pr_err("%s: no tty structures", __func__);
1106 return;
1107 }
1108
1109 hso_dbg(0x8, "port %d\n", serial->minor);
1110
1111 /*
1112 * Fix up unsupported bits
1113 */
1114 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1115
1116 tty->termios.c_cflag &=
1117 ~(CSIZE /* no size */
1118 | PARENB /* disable parity bit */
1119 | CBAUD /* clear current baud rate */
1120 | CBAUDEX); /* clear current buad rate */
1121
1122 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1123
1124 /* baud rate 115200 */
1125 tty_encode_baud_rate(tty, 115200, 115200);
1126 }
1127
1128 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1129 {
1130 int result;
1131 /* We are done with this URB, resubmit it. Prep the USB to wait for
1132 * another frame */
1133 usb_fill_bulk_urb(urb, serial->parent->usb,
1134 usb_rcvbulkpipe(serial->parent->usb,
1135 serial->in_endp->
1136 bEndpointAddress & 0x7F),
1137 urb->transfer_buffer, serial->rx_data_length,
1138 hso_std_serial_read_bulk_callback, serial);
1139 /* Give this to the USB subsystem so it can tell us when more data
1140 * arrives. */
1141 result = usb_submit_urb(urb, GFP_ATOMIC);
1142 if (result) {
1143 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1144 __func__, result);
1145 }
1146 }
1147
1148
1149
1150
1151 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1152 {
1153 int count;
1154 struct urb *curr_urb;
1155
1156 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1157 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1158 count = put_rxbuf_data(curr_urb, serial);
1159 if (count == -1)
1160 return;
1161 if (count == 0) {
1162 serial->curr_rx_urb_idx++;
1163 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1164 serial->curr_rx_urb_idx = 0;
1165 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1166 }
1167 }
1168 }
1169
1170 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1171 {
1172 int count = 0;
1173 struct urb *urb;
1174
1175 urb = serial->rx_urb[0];
1176 if (serial->port.count > 0) {
1177 count = put_rxbuf_data(urb, serial);
1178 if (count == -1)
1179 return;
1180 }
1181 /* Re issue a read as long as we receive data. */
1182
1183 if (count == 0 && ((urb->actual_length != 0) ||
1184 (serial->rx_state == RX_PENDING))) {
1185 serial->rx_state = RX_SENT;
1186 hso_mux_serial_read(serial);
1187 } else
1188 serial->rx_state = RX_IDLE;
1189 }
1190
1191
1192 /* read callback for Diag and CS port */
1193 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1194 {
1195 struct hso_serial *serial = urb->context;
1196 int status = urb->status;
1197
1198 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1199
1200 /* sanity check */
1201 if (!serial) {
1202 hso_dbg(0x1, "serial == NULL\n");
1203 return;
1204 }
1205 if (status) {
1206 handle_usb_error(status, __func__, serial->parent);
1207 return;
1208 }
1209
1210 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1211 DUMP1(urb->transfer_buffer, urb->actual_length);
1212
1213 /* Anyone listening? */
1214 if (serial->port.count == 0)
1215 return;
1216
1217 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1218 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1219 /* Valid data, handle RX data */
1220 spin_lock(&serial->serial_lock);
1221 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1222 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1223 spin_unlock(&serial->serial_lock);
1224 }
1225
1226 /*
1227 * This needs to be a tasklet otherwise we will
1228 * end up recursively calling this function.
1229 */
1230 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1231 {
1232 unsigned long flags;
1233
1234 spin_lock_irqsave(&serial->serial_lock, flags);
1235 if ((serial->parent->port_spec & HSO_INTF_MUX))
1236 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1237 else
1238 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239 spin_unlock_irqrestore(&serial->serial_lock, flags);
1240 }
1241
1242 static void hso_unthrottle(struct tty_struct *tty)
1243 {
1244 struct hso_serial *serial = tty->driver_data;
1245
1246 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1247 }
1248
1249 /* open the requested serial port */
1250 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1251 {
1252 struct hso_serial *serial = get_serial_by_index(tty->index);
1253 int result;
1254
1255 /* sanity check */
1256 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1257 WARN_ON(1);
1258 tty->driver_data = NULL;
1259 hso_dbg(0x1, "Failed to open port\n");
1260 return -ENODEV;
1261 }
1262
1263 mutex_lock(&serial->parent->mutex);
1264 result = usb_autopm_get_interface(serial->parent->interface);
1265 if (result < 0)
1266 goto err_out;
1267
1268 hso_dbg(0x1, "Opening %d\n", serial->minor);
1269
1270 /* setup */
1271 tty->driver_data = serial;
1272 tty_port_tty_set(&serial->port, tty);
1273
1274 /* check for port already opened, if not set the termios */
1275 serial->port.count++;
1276 if (serial->port.count == 1) {
1277 serial->rx_state = RX_IDLE;
1278 /* Force default termio settings */
1279 _hso_serial_set_termios(tty, NULL);
1280 tasklet_init(&serial->unthrottle_tasklet,
1281 (void (*)(unsigned long))hso_unthrottle_tasklet,
1282 (unsigned long)serial);
1283 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1284 if (result) {
1285 hso_stop_serial_device(serial->parent);
1286 serial->port.count--;
1287 } else {
1288 kref_get(&serial->parent->ref);
1289 }
1290 } else {
1291 hso_dbg(0x1, "Port was already open\n");
1292 }
1293
1294 usb_autopm_put_interface(serial->parent->interface);
1295
1296 /* done */
1297 if (result)
1298 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1299 err_out:
1300 mutex_unlock(&serial->parent->mutex);
1301 return result;
1302 }
1303
1304 /* close the requested serial port */
1305 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1306 {
1307 struct hso_serial *serial = tty->driver_data;
1308 u8 usb_gone;
1309
1310 hso_dbg(0x1, "Closing serial port\n");
1311
1312 /* Open failed, no close cleanup required */
1313 if (serial == NULL)
1314 return;
1315
1316 mutex_lock(&serial->parent->mutex);
1317 usb_gone = serial->parent->usb_gone;
1318
1319 if (!usb_gone)
1320 usb_autopm_get_interface(serial->parent->interface);
1321
1322 /* reset the rts and dtr */
1323 /* do the actual close */
1324 serial->port.count--;
1325
1326 if (serial->port.count <= 0) {
1327 serial->port.count = 0;
1328 tty_port_tty_set(&serial->port, NULL);
1329 if (!usb_gone)
1330 hso_stop_serial_device(serial->parent);
1331 tasklet_kill(&serial->unthrottle_tasklet);
1332 }
1333
1334 if (!usb_gone)
1335 usb_autopm_put_interface(serial->parent->interface);
1336
1337 mutex_unlock(&serial->parent->mutex);
1338 }
1339
1340 /* close the requested serial port */
1341 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1342 int count)
1343 {
1344 struct hso_serial *serial = tty->driver_data;
1345 int space, tx_bytes;
1346 unsigned long flags;
1347
1348 /* sanity check */
1349 if (serial == NULL) {
1350 pr_err("%s: serial is NULL\n", __func__);
1351 return -ENODEV;
1352 }
1353
1354 spin_lock_irqsave(&serial->serial_lock, flags);
1355
1356 space = serial->tx_data_length - serial->tx_buffer_count;
1357 tx_bytes = (count < space) ? count : space;
1358
1359 if (!tx_bytes)
1360 goto out;
1361
1362 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1363 serial->tx_buffer_count += tx_bytes;
1364
1365 out:
1366 spin_unlock_irqrestore(&serial->serial_lock, flags);
1367
1368 hso_kick_transmit(serial);
1369 /* done */
1370 return tx_bytes;
1371 }
1372
1373 /* how much room is there for writing */
1374 static int hso_serial_write_room(struct tty_struct *tty)
1375 {
1376 struct hso_serial *serial = tty->driver_data;
1377 int room;
1378 unsigned long flags;
1379
1380 spin_lock_irqsave(&serial->serial_lock, flags);
1381 room = serial->tx_data_length - serial->tx_buffer_count;
1382 spin_unlock_irqrestore(&serial->serial_lock, flags);
1383
1384 /* return free room */
1385 return room;
1386 }
1387
1388 static void hso_serial_cleanup(struct tty_struct *tty)
1389 {
1390 struct hso_serial *serial = tty->driver_data;
1391
1392 if (!serial)
1393 return;
1394
1395 kref_put(&serial->parent->ref, hso_serial_ref_free);
1396 }
1397
1398 /* setup the term */
1399 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1400 {
1401 struct hso_serial *serial = tty->driver_data;
1402 unsigned long flags;
1403
1404 if (old)
1405 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1406 tty->termios.c_cflag, old->c_cflag);
1407
1408 /* the actual setup */
1409 spin_lock_irqsave(&serial->serial_lock, flags);
1410 if (serial->port.count)
1411 _hso_serial_set_termios(tty, old);
1412 else
1413 tty->termios = *old;
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 /* done */
1417 }
1418
1419 /* how many characters in the buffer */
1420 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1421 {
1422 struct hso_serial *serial = tty->driver_data;
1423 int chars;
1424 unsigned long flags;
1425
1426 /* sanity check */
1427 if (serial == NULL)
1428 return 0;
1429
1430 spin_lock_irqsave(&serial->serial_lock, flags);
1431 chars = serial->tx_buffer_count;
1432 spin_unlock_irqrestore(&serial->serial_lock, flags);
1433
1434 return chars;
1435 }
1436 static int tiocmget_submit_urb(struct hso_serial *serial,
1437 struct hso_tiocmget *tiocmget,
1438 struct usb_device *usb)
1439 {
1440 int result;
1441
1442 if (serial->parent->usb_gone)
1443 return -ENODEV;
1444 usb_fill_int_urb(tiocmget->urb, usb,
1445 usb_rcvintpipe(usb,
1446 tiocmget->endp->
1447 bEndpointAddress & 0x7F),
1448 &tiocmget->serial_state_notification,
1449 sizeof(struct hso_serial_state_notification),
1450 tiocmget_intr_callback, serial,
1451 tiocmget->endp->bInterval);
1452 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1453 if (result) {
1454 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1455 result);
1456 }
1457 return result;
1458
1459 }
1460
1461 static void tiocmget_intr_callback(struct urb *urb)
1462 {
1463 struct hso_serial *serial = urb->context;
1464 struct hso_tiocmget *tiocmget;
1465 int status = urb->status;
1466 u16 UART_state_bitmap, prev_UART_state_bitmap;
1467 struct uart_icount *icount;
1468 struct hso_serial_state_notification *serial_state_notification;
1469 struct usb_device *usb;
1470 struct usb_interface *interface;
1471 int if_num;
1472
1473 /* Sanity checks */
1474 if (!serial)
1475 return;
1476 if (status) {
1477 handle_usb_error(status, __func__, serial->parent);
1478 return;
1479 }
1480
1481 /* tiocmget is only supported on HSO_PORT_MODEM */
1482 tiocmget = serial->tiocmget;
1483 if (!tiocmget)
1484 return;
1485 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1486
1487 usb = serial->parent->usb;
1488 interface = serial->parent->interface;
1489
1490 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1491
1492 /* wIndex should be the USB interface number of the port to which the
1493 * notification applies, which should always be the Modem port.
1494 */
1495 serial_state_notification = &tiocmget->serial_state_notification;
1496 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1497 serial_state_notification->bNotification != B_NOTIFICATION ||
1498 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1499 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1500 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1501 dev_warn(&usb->dev,
1502 "hso received invalid serial state notification\n");
1503 DUMP(serial_state_notification,
1504 sizeof(struct hso_serial_state_notification));
1505 } else {
1506
1507 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1508 UART_state_bitmap);
1509 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1510 icount = &tiocmget->icount;
1511 spin_lock(&serial->serial_lock);
1512 if ((UART_state_bitmap & B_OVERRUN) !=
1513 (prev_UART_state_bitmap & B_OVERRUN))
1514 icount->parity++;
1515 if ((UART_state_bitmap & B_PARITY) !=
1516 (prev_UART_state_bitmap & B_PARITY))
1517 icount->parity++;
1518 if ((UART_state_bitmap & B_FRAMING) !=
1519 (prev_UART_state_bitmap & B_FRAMING))
1520 icount->frame++;
1521 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1522 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1523 icount->rng++;
1524 if ((UART_state_bitmap & B_BREAK) !=
1525 (prev_UART_state_bitmap & B_BREAK))
1526 icount->brk++;
1527 if ((UART_state_bitmap & B_TX_CARRIER) !=
1528 (prev_UART_state_bitmap & B_TX_CARRIER))
1529 icount->dsr++;
1530 if ((UART_state_bitmap & B_RX_CARRIER) !=
1531 (prev_UART_state_bitmap & B_RX_CARRIER))
1532 icount->dcd++;
1533 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1534 spin_unlock(&serial->serial_lock);
1535 tiocmget->intr_completed = 1;
1536 wake_up_interruptible(&tiocmget->waitq);
1537 }
1538 memset(serial_state_notification, 0,
1539 sizeof(struct hso_serial_state_notification));
1540 tiocmget_submit_urb(serial,
1541 tiocmget,
1542 serial->parent->usb);
1543 }
1544
1545 /*
1546 * next few functions largely stolen from drivers/serial/serial_core.c
1547 */
1548 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1549 * - mask passed in arg for lines of interest
1550 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1551 * Caller should use TIOCGICOUNT to see which one it was
1552 */
1553 static int
1554 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1555 {
1556 DECLARE_WAITQUEUE(wait, current);
1557 struct uart_icount cprev, cnow;
1558 struct hso_tiocmget *tiocmget;
1559 int ret;
1560
1561 tiocmget = serial->tiocmget;
1562 if (!tiocmget)
1563 return -ENOENT;
1564 /*
1565 * note the counters on entry
1566 */
1567 spin_lock_irq(&serial->serial_lock);
1568 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1569 spin_unlock_irq(&serial->serial_lock);
1570 add_wait_queue(&tiocmget->waitq, &wait);
1571 for (;;) {
1572 spin_lock_irq(&serial->serial_lock);
1573 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1574 spin_unlock_irq(&serial->serial_lock);
1575 set_current_state(TASK_INTERRUPTIBLE);
1576 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1577 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1578 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1579 ret = 0;
1580 break;
1581 }
1582 schedule();
1583 /* see if a signal did it */
1584 if (signal_pending(current)) {
1585 ret = -ERESTARTSYS;
1586 break;
1587 }
1588 cprev = cnow;
1589 }
1590 __set_current_state(TASK_RUNNING);
1591 remove_wait_queue(&tiocmget->waitq, &wait);
1592
1593 return ret;
1594 }
1595
1596 /*
1597 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1598 * Return: write counters to the user passed counter struct
1599 * NB: both 1->0 and 0->1 transitions are counted except for
1600 * RI where only 0->1 is counted.
1601 */
1602 static int hso_get_count(struct tty_struct *tty,
1603 struct serial_icounter_struct *icount)
1604 {
1605 struct uart_icount cnow;
1606 struct hso_serial *serial = tty->driver_data;
1607 struct hso_tiocmget *tiocmget = serial->tiocmget;
1608
1609 memset(icount, 0, sizeof(struct serial_icounter_struct));
1610
1611 if (!tiocmget)
1612 return -ENOENT;
1613 spin_lock_irq(&serial->serial_lock);
1614 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1615 spin_unlock_irq(&serial->serial_lock);
1616
1617 icount->cts = cnow.cts;
1618 icount->dsr = cnow.dsr;
1619 icount->rng = cnow.rng;
1620 icount->dcd = cnow.dcd;
1621 icount->rx = cnow.rx;
1622 icount->tx = cnow.tx;
1623 icount->frame = cnow.frame;
1624 icount->overrun = cnow.overrun;
1625 icount->parity = cnow.parity;
1626 icount->brk = cnow.brk;
1627 icount->buf_overrun = cnow.buf_overrun;
1628
1629 return 0;
1630 }
1631
1632
1633 static int hso_serial_tiocmget(struct tty_struct *tty)
1634 {
1635 int retval;
1636 struct hso_serial *serial = tty->driver_data;
1637 struct hso_tiocmget *tiocmget;
1638 u16 UART_state_bitmap;
1639
1640 /* sanity check */
1641 if (!serial) {
1642 hso_dbg(0x1, "no tty structures\n");
1643 return -EINVAL;
1644 }
1645 spin_lock_irq(&serial->serial_lock);
1646 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1647 ((serial->dtr_state) ? TIOCM_DTR : 0);
1648 tiocmget = serial->tiocmget;
1649 if (tiocmget) {
1650
1651 UART_state_bitmap = le16_to_cpu(
1652 tiocmget->prev_UART_state_bitmap);
1653 if (UART_state_bitmap & B_RING_SIGNAL)
1654 retval |= TIOCM_RNG;
1655 if (UART_state_bitmap & B_RX_CARRIER)
1656 retval |= TIOCM_CD;
1657 if (UART_state_bitmap & B_TX_CARRIER)
1658 retval |= TIOCM_DSR;
1659 }
1660 spin_unlock_irq(&serial->serial_lock);
1661 return retval;
1662 }
1663
1664 static int hso_serial_tiocmset(struct tty_struct *tty,
1665 unsigned int set, unsigned int clear)
1666 {
1667 int val = 0;
1668 unsigned long flags;
1669 int if_num;
1670 struct hso_serial *serial = tty->driver_data;
1671 struct usb_interface *interface;
1672
1673 /* sanity check */
1674 if (!serial) {
1675 hso_dbg(0x1, "no tty structures\n");
1676 return -EINVAL;
1677 }
1678
1679 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1680 return -EINVAL;
1681
1682 interface = serial->parent->interface;
1683 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1684
1685 spin_lock_irqsave(&serial->serial_lock, flags);
1686 if (set & TIOCM_RTS)
1687 serial->rts_state = 1;
1688 if (set & TIOCM_DTR)
1689 serial->dtr_state = 1;
1690
1691 if (clear & TIOCM_RTS)
1692 serial->rts_state = 0;
1693 if (clear & TIOCM_DTR)
1694 serial->dtr_state = 0;
1695
1696 if (serial->dtr_state)
1697 val |= 0x01;
1698 if (serial->rts_state)
1699 val |= 0x02;
1700
1701 spin_unlock_irqrestore(&serial->serial_lock, flags);
1702
1703 return usb_control_msg(serial->parent->usb,
1704 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1705 0x21, val, if_num, NULL, 0,
1706 USB_CTRL_SET_TIMEOUT);
1707 }
1708
1709 static int hso_serial_ioctl(struct tty_struct *tty,
1710 unsigned int cmd, unsigned long arg)
1711 {
1712 struct hso_serial *serial = tty->driver_data;
1713 int ret = 0;
1714 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1715
1716 if (!serial)
1717 return -ENODEV;
1718 switch (cmd) {
1719 case TIOCMIWAIT:
1720 ret = hso_wait_modem_status(serial, arg);
1721 break;
1722 default:
1723 ret = -ENOIOCTLCMD;
1724 break;
1725 }
1726 return ret;
1727 }
1728
1729
1730 /* starts a transmit */
1731 static void hso_kick_transmit(struct hso_serial *serial)
1732 {
1733 u8 *temp;
1734 unsigned long flags;
1735 int res;
1736
1737 spin_lock_irqsave(&serial->serial_lock, flags);
1738 if (!serial->tx_buffer_count)
1739 goto out;
1740
1741 if (serial->tx_urb_used)
1742 goto out;
1743
1744 /* Wakeup USB interface if necessary */
1745 if (hso_get_activity(serial->parent) == -EAGAIN)
1746 goto out;
1747
1748 /* Switch pointers around to avoid memcpy */
1749 temp = serial->tx_buffer;
1750 serial->tx_buffer = serial->tx_data;
1751 serial->tx_data = temp;
1752 serial->tx_data_count = serial->tx_buffer_count;
1753 serial->tx_buffer_count = 0;
1754
1755 /* If temp is set, it means we switched buffers */
1756 if (temp && serial->write_data) {
1757 res = serial->write_data(serial);
1758 if (res >= 0)
1759 serial->tx_urb_used = 1;
1760 }
1761 out:
1762 spin_unlock_irqrestore(&serial->serial_lock, flags);
1763 }
1764
1765 /* make a request (for reading and writing data to muxed serial port) */
1766 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1767 struct urb *ctrl_urb,
1768 struct usb_ctrlrequest *ctrl_req,
1769 u8 *ctrl_urb_data, u32 size)
1770 {
1771 int result;
1772 int pipe;
1773
1774 /* Sanity check */
1775 if (!serial || !ctrl_urb || !ctrl_req) {
1776 pr_err("%s: Wrong arguments\n", __func__);
1777 return -EINVAL;
1778 }
1779
1780 /* initialize */
1781 ctrl_req->wValue = 0;
1782 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1783 ctrl_req->wLength = cpu_to_le16(size);
1784
1785 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1786 /* Reading command */
1787 ctrl_req->bRequestType = USB_DIR_IN |
1788 USB_TYPE_OPTION_VENDOR |
1789 USB_RECIP_INTERFACE;
1790 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1791 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1792 } else {
1793 /* Writing command */
1794 ctrl_req->bRequestType = USB_DIR_OUT |
1795 USB_TYPE_OPTION_VENDOR |
1796 USB_RECIP_INTERFACE;
1797 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1798 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1799 }
1800 /* syslog */
1801 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1802 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1803 ctrl_req->bRequestType, ctrl_req->wLength, port);
1804
1805 /* Load ctrl urb */
1806 ctrl_urb->transfer_flags = 0;
1807 usb_fill_control_urb(ctrl_urb,
1808 serial->parent->usb,
1809 pipe,
1810 (u8 *) ctrl_req,
1811 ctrl_urb_data, size, ctrl_callback, serial);
1812 /* Send it on merry way */
1813 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1814 if (result) {
1815 dev_err(&ctrl_urb->dev->dev,
1816 "%s failed submit ctrl_urb %d type %d\n", __func__,
1817 result, type);
1818 return result;
1819 }
1820
1821 /* done */
1822 return size;
1823 }
1824
1825 /* called by intr_callback when read occurs */
1826 static int hso_mux_serial_read(struct hso_serial *serial)
1827 {
1828 if (!serial)
1829 return -EINVAL;
1830
1831 /* clean data */
1832 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1833 /* make the request */
1834
1835 if (serial->num_rx_urbs != 1) {
1836 dev_err(&serial->parent->interface->dev,
1837 "ERROR: mux'd reads with multiple buffers "
1838 "not possible\n");
1839 return 0;
1840 }
1841 return mux_device_request(serial,
1842 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1843 serial->parent->port_spec & HSO_PORT_MASK,
1844 serial->rx_urb[0],
1845 &serial->ctrl_req_rx,
1846 serial->rx_data[0], serial->rx_data_length);
1847 }
1848
1849 /* used for muxed serial port callback (muxed serial read) */
1850 static void intr_callback(struct urb *urb)
1851 {
1852 struct hso_shared_int *shared_int = urb->context;
1853 struct hso_serial *serial;
1854 unsigned char *port_req;
1855 int status = urb->status;
1856 int i;
1857
1858 usb_mark_last_busy(urb->dev);
1859
1860 /* sanity check */
1861 if (!shared_int)
1862 return;
1863
1864 /* status check */
1865 if (status) {
1866 handle_usb_error(status, __func__, NULL);
1867 return;
1868 }
1869 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1870
1871 /* what request? */
1872 port_req = urb->transfer_buffer;
1873 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1874 /* loop over all muxed ports to find the one sending this */
1875 for (i = 0; i < 8; i++) {
1876 /* max 8 channels on MUX */
1877 if (*port_req & (1 << i)) {
1878 serial = get_serial_by_shared_int_and_type(shared_int,
1879 (1 << i));
1880 if (serial != NULL) {
1881 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1882 i);
1883 spin_lock(&serial->serial_lock);
1884 if (serial->rx_state == RX_IDLE &&
1885 serial->port.count > 0) {
1886 /* Setup and send a ctrl req read on
1887 * port i */
1888 if (!serial->rx_urb_filled[0]) {
1889 serial->rx_state = RX_SENT;
1890 hso_mux_serial_read(serial);
1891 } else
1892 serial->rx_state = RX_PENDING;
1893 } else {
1894 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1895 i);
1896 }
1897 spin_unlock(&serial->serial_lock);
1898 }
1899 }
1900 }
1901 /* Resubmit interrupt urb */
1902 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1903 }
1904
1905 /* called for writing to muxed serial port */
1906 static int hso_mux_serial_write_data(struct hso_serial *serial)
1907 {
1908 if (NULL == serial)
1909 return -EINVAL;
1910
1911 return mux_device_request(serial,
1912 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1913 serial->parent->port_spec & HSO_PORT_MASK,
1914 serial->tx_urb,
1915 &serial->ctrl_req_tx,
1916 serial->tx_data, serial->tx_data_count);
1917 }
1918
1919 /* write callback for Diag and CS port */
1920 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1921 {
1922 struct hso_serial *serial = urb->context;
1923 int status = urb->status;
1924
1925 /* sanity check */
1926 if (!serial) {
1927 hso_dbg(0x1, "serial == NULL\n");
1928 return;
1929 }
1930
1931 spin_lock(&serial->serial_lock);
1932 serial->tx_urb_used = 0;
1933 spin_unlock(&serial->serial_lock);
1934 if (status) {
1935 handle_usb_error(status, __func__, serial->parent);
1936 return;
1937 }
1938 hso_put_activity(serial->parent);
1939 tty_port_tty_wakeup(&serial->port);
1940 hso_kick_transmit(serial);
1941
1942 hso_dbg(0x1, "\n");
1943 }
1944
1945 /* called for writing diag or CS serial port */
1946 static int hso_std_serial_write_data(struct hso_serial *serial)
1947 {
1948 int count = serial->tx_data_count;
1949 int result;
1950
1951 usb_fill_bulk_urb(serial->tx_urb,
1952 serial->parent->usb,
1953 usb_sndbulkpipe(serial->parent->usb,
1954 serial->out_endp->
1955 bEndpointAddress & 0x7F),
1956 serial->tx_data, serial->tx_data_count,
1957 hso_std_serial_write_bulk_callback, serial);
1958
1959 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1960 if (result) {
1961 dev_warn(&serial->parent->usb->dev,
1962 "Failed to submit urb - res %d\n", result);
1963 return result;
1964 }
1965
1966 return count;
1967 }
1968
1969 /* callback after read or write on muxed serial port */
1970 static void ctrl_callback(struct urb *urb)
1971 {
1972 struct hso_serial *serial = urb->context;
1973 struct usb_ctrlrequest *req;
1974 int status = urb->status;
1975
1976 /* sanity check */
1977 if (!serial)
1978 return;
1979
1980 spin_lock(&serial->serial_lock);
1981 serial->tx_urb_used = 0;
1982 spin_unlock(&serial->serial_lock);
1983 if (status) {
1984 handle_usb_error(status, __func__, serial->parent);
1985 return;
1986 }
1987
1988 /* what request? */
1989 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1990 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1991 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1992 DUMP1(urb->transfer_buffer, urb->actual_length);
1993
1994 if (req->bRequestType ==
1995 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1996 /* response to a read command */
1997 serial->rx_urb_filled[0] = 1;
1998 spin_lock(&serial->serial_lock);
1999 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2000 spin_unlock(&serial->serial_lock);
2001 } else {
2002 hso_put_activity(serial->parent);
2003 tty_port_tty_wakeup(&serial->port);
2004 /* response to a write command */
2005 hso_kick_transmit(serial);
2006 }
2007 }
2008
2009 /* handle RX data for serial port */
2010 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2011 {
2012 struct tty_struct *tty;
2013 int count;
2014
2015 /* Sanity check */
2016 if (urb == NULL || serial == NULL) {
2017 hso_dbg(0x1, "serial = NULL\n");
2018 return -2;
2019 }
2020
2021 tty = tty_port_tty_get(&serial->port);
2022
2023 if (tty && tty_throttled(tty)) {
2024 tty_kref_put(tty);
2025 return -1;
2026 }
2027
2028 /* Push data to tty */
2029 hso_dbg(0x1, "data to push to tty\n");
2030 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2031 if (count >= urb->actual_length) {
2032 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2033 urb->actual_length);
2034 tty_flip_buffer_push(&serial->port);
2035 } else {
2036 dev_warn(&serial->parent->usb->dev,
2037 "dropping data, %d bytes lost\n", urb->actual_length);
2038 }
2039
2040 tty_kref_put(tty);
2041
2042 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2043
2044 return 0;
2045 }
2046
2047
2048 /* Base driver functions */
2049
2050 static void hso_log_port(struct hso_device *hso_dev)
2051 {
2052 char *port_type;
2053 char port_dev[20];
2054
2055 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2056 case HSO_PORT_CONTROL:
2057 port_type = "Control";
2058 break;
2059 case HSO_PORT_APP:
2060 port_type = "Application";
2061 break;
2062 case HSO_PORT_GPS:
2063 port_type = "GPS";
2064 break;
2065 case HSO_PORT_GPS_CONTROL:
2066 port_type = "GPS control";
2067 break;
2068 case HSO_PORT_APP2:
2069 port_type = "Application2";
2070 break;
2071 case HSO_PORT_PCSC:
2072 port_type = "PCSC";
2073 break;
2074 case HSO_PORT_DIAG:
2075 port_type = "Diagnostic";
2076 break;
2077 case HSO_PORT_DIAG2:
2078 port_type = "Diagnostic2";
2079 break;
2080 case HSO_PORT_MODEM:
2081 port_type = "Modem";
2082 break;
2083 case HSO_PORT_NETWORK:
2084 port_type = "Network";
2085 break;
2086 default:
2087 port_type = "Unknown";
2088 break;
2089 }
2090 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2091 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2092 } else
2093 sprintf(port_dev, "/dev/%s%d", tty_filename,
2094 dev2ser(hso_dev)->minor);
2095
2096 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2097 port_type, port_dev);
2098 }
2099
2100 static int hso_start_net_device(struct hso_device *hso_dev)
2101 {
2102 int i, result = 0;
2103 struct hso_net *hso_net = dev2net(hso_dev);
2104
2105 if (!hso_net)
2106 return -ENODEV;
2107
2108 /* send URBs for all read buffers */
2109 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2110
2111 /* Prep a receive URB */
2112 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2113 hso_dev->usb,
2114 usb_rcvbulkpipe(hso_dev->usb,
2115 hso_net->in_endp->
2116 bEndpointAddress & 0x7F),
2117 hso_net->mux_bulk_rx_buf_pool[i],
2118 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2119 hso_net);
2120
2121 /* Put it out there so the device can send us stuff */
2122 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2123 GFP_NOIO);
2124 if (result)
2125 dev_warn(&hso_dev->usb->dev,
2126 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2127 i, result);
2128 }
2129
2130 return result;
2131 }
2132
2133 static int hso_stop_net_device(struct hso_device *hso_dev)
2134 {
2135 int i;
2136 struct hso_net *hso_net = dev2net(hso_dev);
2137
2138 if (!hso_net)
2139 return -ENODEV;
2140
2141 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2142 if (hso_net->mux_bulk_rx_urb_pool[i])
2143 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2144
2145 }
2146 if (hso_net->mux_bulk_tx_urb)
2147 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2148
2149 return 0;
2150 }
2151
2152 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2153 {
2154 int i, result = 0;
2155 struct hso_serial *serial = dev2ser(hso_dev);
2156
2157 if (!serial)
2158 return -ENODEV;
2159
2160 /* If it is not the MUX port fill in and submit a bulk urb (already
2161 * allocated in hso_serial_start) */
2162 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2163 for (i = 0; i < serial->num_rx_urbs; i++) {
2164 usb_fill_bulk_urb(serial->rx_urb[i],
2165 serial->parent->usb,
2166 usb_rcvbulkpipe(serial->parent->usb,
2167 serial->in_endp->
2168 bEndpointAddress &
2169 0x7F),
2170 serial->rx_data[i],
2171 serial->rx_data_length,
2172 hso_std_serial_read_bulk_callback,
2173 serial);
2174 result = usb_submit_urb(serial->rx_urb[i], flags);
2175 if (result) {
2176 dev_warn(&serial->parent->usb->dev,
2177 "Failed to submit urb - res %d\n",
2178 result);
2179 break;
2180 }
2181 }
2182 } else {
2183 mutex_lock(&serial->shared_int->shared_int_lock);
2184 if (!serial->shared_int->use_count) {
2185 result =
2186 hso_mux_submit_intr_urb(serial->shared_int,
2187 hso_dev->usb, flags);
2188 }
2189 serial->shared_int->use_count++;
2190 mutex_unlock(&serial->shared_int->shared_int_lock);
2191 }
2192 if (serial->tiocmget)
2193 tiocmget_submit_urb(serial,
2194 serial->tiocmget,
2195 serial->parent->usb);
2196 return result;
2197 }
2198
2199 static int hso_stop_serial_device(struct hso_device *hso_dev)
2200 {
2201 int i;
2202 struct hso_serial *serial = dev2ser(hso_dev);
2203 struct hso_tiocmget *tiocmget;
2204
2205 if (!serial)
2206 return -ENODEV;
2207
2208 for (i = 0; i < serial->num_rx_urbs; i++) {
2209 if (serial->rx_urb[i]) {
2210 usb_kill_urb(serial->rx_urb[i]);
2211 serial->rx_urb_filled[i] = 0;
2212 }
2213 }
2214 serial->curr_rx_urb_idx = 0;
2215
2216 if (serial->tx_urb)
2217 usb_kill_urb(serial->tx_urb);
2218
2219 if (serial->shared_int) {
2220 mutex_lock(&serial->shared_int->shared_int_lock);
2221 if (serial->shared_int->use_count &&
2222 (--serial->shared_int->use_count == 0)) {
2223 struct urb *urb;
2224
2225 urb = serial->shared_int->shared_intr_urb;
2226 if (urb)
2227 usb_kill_urb(urb);
2228 }
2229 mutex_unlock(&serial->shared_int->shared_int_lock);
2230 }
2231 tiocmget = serial->tiocmget;
2232 if (tiocmget) {
2233 wake_up_interruptible(&tiocmget->waitq);
2234 usb_kill_urb(tiocmget->urb);
2235 }
2236
2237 return 0;
2238 }
2239
2240 static void hso_serial_tty_unregister(struct hso_serial *serial)
2241 {
2242 tty_unregister_device(tty_drv, serial->minor);
2243 }
2244
2245 static void hso_serial_common_free(struct hso_serial *serial)
2246 {
2247 int i;
2248
2249 for (i = 0; i < serial->num_rx_urbs; i++) {
2250 /* unlink and free RX URB */
2251 usb_free_urb(serial->rx_urb[i]);
2252 /* free the RX buffer */
2253 kfree(serial->rx_data[i]);
2254 }
2255
2256 /* unlink and free TX URB */
2257 usb_free_urb(serial->tx_urb);
2258 kfree(serial->tx_buffer);
2259 kfree(serial->tx_data);
2260 tty_port_destroy(&serial->port);
2261 }
2262
2263 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2264 int rx_size, int tx_size)
2265 {
2266 struct device *dev;
2267 int minor;
2268 int i;
2269
2270 tty_port_init(&serial->port);
2271
2272 minor = get_free_serial_index();
2273 if (minor < 0)
2274 goto exit;
2275
2276 /* register our minor number */
2277 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2278 tty_drv, minor, &serial->parent->interface->dev,
2279 serial->parent, hso_serial_dev_groups);
2280 dev = serial->parent->dev;
2281
2282 /* fill in specific data for later use */
2283 serial->minor = minor;
2284 serial->magic = HSO_SERIAL_MAGIC;
2285 spin_lock_init(&serial->serial_lock);
2286 serial->num_rx_urbs = num_urbs;
2287
2288 /* RX, allocate urb and initialize */
2289
2290 /* prepare our RX buffer */
2291 serial->rx_data_length = rx_size;
2292 for (i = 0; i < serial->num_rx_urbs; i++) {
2293 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2294 if (!serial->rx_urb[i])
2295 goto exit;
2296 serial->rx_urb[i]->transfer_buffer = NULL;
2297 serial->rx_urb[i]->transfer_buffer_length = 0;
2298 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2299 GFP_KERNEL);
2300 if (!serial->rx_data[i])
2301 goto exit;
2302 }
2303
2304 /* TX, allocate urb and initialize */
2305 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2306 if (!serial->tx_urb)
2307 goto exit;
2308 serial->tx_urb->transfer_buffer = NULL;
2309 serial->tx_urb->transfer_buffer_length = 0;
2310 /* prepare our TX buffer */
2311 serial->tx_data_count = 0;
2312 serial->tx_buffer_count = 0;
2313 serial->tx_data_length = tx_size;
2314 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2315 if (!serial->tx_data)
2316 goto exit;
2317
2318 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2319 if (!serial->tx_buffer)
2320 goto exit;
2321
2322 return 0;
2323 exit:
2324 hso_serial_tty_unregister(serial);
2325 hso_serial_common_free(serial);
2326 return -1;
2327 }
2328
2329 /* Creates a general hso device */
2330 static struct hso_device *hso_create_device(struct usb_interface *intf,
2331 int port_spec)
2332 {
2333 struct hso_device *hso_dev;
2334
2335 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2336 if (!hso_dev)
2337 return NULL;
2338
2339 hso_dev->port_spec = port_spec;
2340 hso_dev->usb = interface_to_usbdev(intf);
2341 hso_dev->interface = intf;
2342 kref_init(&hso_dev->ref);
2343 mutex_init(&hso_dev->mutex);
2344
2345 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2346 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2347
2348 return hso_dev;
2349 }
2350
2351 /* Removes a network device in the network device table */
2352 static int remove_net_device(struct hso_device *hso_dev)
2353 {
2354 int i;
2355
2356 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2357 if (network_table[i] == hso_dev) {
2358 network_table[i] = NULL;
2359 break;
2360 }
2361 }
2362 if (i == HSO_MAX_NET_DEVICES)
2363 return -1;
2364 return 0;
2365 }
2366
2367 /* Frees our network device */
2368 static void hso_free_net_device(struct hso_device *hso_dev)
2369 {
2370 int i;
2371 struct hso_net *hso_net = dev2net(hso_dev);
2372
2373 if (!hso_net)
2374 return;
2375
2376 remove_net_device(hso_net->parent);
2377
2378 if (hso_net->net)
2379 unregister_netdev(hso_net->net);
2380
2381 /* start freeing */
2382 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2383 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2384 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2385 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2386 }
2387 usb_free_urb(hso_net->mux_bulk_tx_urb);
2388 kfree(hso_net->mux_bulk_tx_buf);
2389 hso_net->mux_bulk_tx_buf = NULL;
2390
2391 if (hso_net->net)
2392 free_netdev(hso_net->net);
2393
2394 kfree(hso_dev);
2395 }
2396
2397 static const struct net_device_ops hso_netdev_ops = {
2398 .ndo_open = hso_net_open,
2399 .ndo_stop = hso_net_close,
2400 .ndo_start_xmit = hso_net_start_xmit,
2401 .ndo_tx_timeout = hso_net_tx_timeout,
2402 };
2403
2404 /* initialize the network interface */
2405 static void hso_net_init(struct net_device *net)
2406 {
2407 struct hso_net *hso_net = netdev_priv(net);
2408
2409 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2410
2411 /* fill in the other fields */
2412 net->netdev_ops = &hso_netdev_ops;
2413 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2414 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2415 net->type = ARPHRD_NONE;
2416 net->mtu = DEFAULT_MTU - 14;
2417 net->tx_queue_len = 10;
2418 net->ethtool_ops = &ops;
2419
2420 /* and initialize the semaphore */
2421 spin_lock_init(&hso_net->net_lock);
2422 }
2423
2424 /* Adds a network device in the network device table */
2425 static int add_net_device(struct hso_device *hso_dev)
2426 {
2427 int i;
2428
2429 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2430 if (network_table[i] == NULL) {
2431 network_table[i] = hso_dev;
2432 break;
2433 }
2434 }
2435 if (i == HSO_MAX_NET_DEVICES)
2436 return -1;
2437 return 0;
2438 }
2439
2440 static int hso_rfkill_set_block(void *data, bool blocked)
2441 {
2442 struct hso_device *hso_dev = data;
2443 int enabled = !blocked;
2444 int rv;
2445
2446 mutex_lock(&hso_dev->mutex);
2447 if (hso_dev->usb_gone)
2448 rv = 0;
2449 else
2450 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2451 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2452 USB_CTRL_SET_TIMEOUT);
2453 mutex_unlock(&hso_dev->mutex);
2454 return rv;
2455 }
2456
2457 static const struct rfkill_ops hso_rfkill_ops = {
2458 .set_block = hso_rfkill_set_block,
2459 };
2460
2461 /* Creates and sets up everything for rfkill */
2462 static void hso_create_rfkill(struct hso_device *hso_dev,
2463 struct usb_interface *interface)
2464 {
2465 struct hso_net *hso_net = dev2net(hso_dev);
2466 struct device *dev = &hso_net->net->dev;
2467 static u32 rfkill_counter;
2468
2469 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2470 rfkill_counter++);
2471
2472 hso_net->rfkill = rfkill_alloc(hso_net->name,
2473 &interface_to_usbdev(interface)->dev,
2474 RFKILL_TYPE_WWAN,
2475 &hso_rfkill_ops, hso_dev);
2476 if (!hso_net->rfkill) {
2477 dev_err(dev, "%s - Out of memory\n", __func__);
2478 return;
2479 }
2480 if (rfkill_register(hso_net->rfkill) < 0) {
2481 rfkill_destroy(hso_net->rfkill);
2482 hso_net->rfkill = NULL;
2483 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2484 return;
2485 }
2486 }
2487
2488 static struct device_type hso_type = {
2489 .name = "wwan",
2490 };
2491
2492 /* Creates our network device */
2493 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2494 int port_spec)
2495 {
2496 int result, i;
2497 struct net_device *net;
2498 struct hso_net *hso_net;
2499 struct hso_device *hso_dev;
2500
2501 hso_dev = hso_create_device(interface, port_spec);
2502 if (!hso_dev)
2503 return NULL;
2504
2505 /* allocate our network device, then we can put in our private data */
2506 /* call hso_net_init to do the basic initialization */
2507 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2508 hso_net_init);
2509 if (!net) {
2510 dev_err(&interface->dev, "Unable to create ethernet device\n");
2511 goto exit;
2512 }
2513
2514 hso_net = netdev_priv(net);
2515
2516 hso_dev->port_data.dev_net = hso_net;
2517 hso_net->net = net;
2518 hso_net->parent = hso_dev;
2519
2520 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2521 USB_DIR_IN);
2522 if (!hso_net->in_endp) {
2523 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2524 goto exit;
2525 }
2526 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2527 USB_DIR_OUT);
2528 if (!hso_net->out_endp) {
2529 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2530 goto exit;
2531 }
2532 SET_NETDEV_DEV(net, &interface->dev);
2533 SET_NETDEV_DEVTYPE(net, &hso_type);
2534
2535 /* start allocating */
2536 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2537 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2538 if (!hso_net->mux_bulk_rx_urb_pool[i])
2539 goto exit;
2540 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2541 GFP_KERNEL);
2542 if (!hso_net->mux_bulk_rx_buf_pool[i])
2543 goto exit;
2544 }
2545 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2546 if (!hso_net->mux_bulk_tx_urb)
2547 goto exit;
2548 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2549 if (!hso_net->mux_bulk_tx_buf)
2550 goto exit;
2551
2552 add_net_device(hso_dev);
2553
2554 /* registering our net device */
2555 result = register_netdev(net);
2556 if (result) {
2557 dev_err(&interface->dev, "Failed to register device\n");
2558 goto exit;
2559 }
2560
2561 hso_log_port(hso_dev);
2562
2563 hso_create_rfkill(hso_dev, interface);
2564
2565 return hso_dev;
2566 exit:
2567 hso_free_net_device(hso_dev);
2568 return NULL;
2569 }
2570
2571 static void hso_free_tiomget(struct hso_serial *serial)
2572 {
2573 struct hso_tiocmget *tiocmget;
2574 if (!serial)
2575 return;
2576 tiocmget = serial->tiocmget;
2577 if (tiocmget) {
2578 usb_free_urb(tiocmget->urb);
2579 tiocmget->urb = NULL;
2580 serial->tiocmget = NULL;
2581 kfree(tiocmget);
2582 }
2583 }
2584
2585 /* Frees an AT channel ( goes for both mux and non-mux ) */
2586 static void hso_free_serial_device(struct hso_device *hso_dev)
2587 {
2588 struct hso_serial *serial = dev2ser(hso_dev);
2589
2590 if (!serial)
2591 return;
2592
2593 hso_serial_common_free(serial);
2594
2595 if (serial->shared_int) {
2596 mutex_lock(&serial->shared_int->shared_int_lock);
2597 if (--serial->shared_int->ref_count == 0)
2598 hso_free_shared_int(serial->shared_int);
2599 else
2600 mutex_unlock(&serial->shared_int->shared_int_lock);
2601 }
2602 hso_free_tiomget(serial);
2603 kfree(serial);
2604 kfree(hso_dev);
2605 }
2606
2607 /* Creates a bulk AT channel */
2608 static struct hso_device *hso_create_bulk_serial_device(
2609 struct usb_interface *interface, int port)
2610 {
2611 struct hso_device *hso_dev;
2612 struct hso_serial *serial;
2613 int num_urbs;
2614 struct hso_tiocmget *tiocmget;
2615
2616 hso_dev = hso_create_device(interface, port);
2617 if (!hso_dev)
2618 return NULL;
2619
2620 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2621 if (!serial)
2622 goto exit;
2623
2624 serial->parent = hso_dev;
2625 hso_dev->port_data.dev_serial = serial;
2626
2627 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2628 num_urbs = 2;
2629 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2630 GFP_KERNEL);
2631 /* it isn't going to break our heart if serial->tiocmget
2632 * allocation fails don't bother checking this.
2633 */
2634 if (serial->tiocmget) {
2635 tiocmget = serial->tiocmget;
2636 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2637 if (tiocmget->urb) {
2638 mutex_init(&tiocmget->mutex);
2639 init_waitqueue_head(&tiocmget->waitq);
2640 tiocmget->endp = hso_get_ep(
2641 interface,
2642 USB_ENDPOINT_XFER_INT,
2643 USB_DIR_IN);
2644 } else
2645 hso_free_tiomget(serial);
2646 }
2647 }
2648 else
2649 num_urbs = 1;
2650
2651 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2652 BULK_URB_TX_SIZE))
2653 goto exit;
2654
2655 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2656 USB_DIR_IN);
2657 if (!serial->in_endp) {
2658 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2659 goto exit2;
2660 }
2661
2662 if (!
2663 (serial->out_endp =
2664 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2665 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2666 goto exit2;
2667 }
2668
2669 serial->write_data = hso_std_serial_write_data;
2670
2671 /* and record this serial */
2672 set_serial_by_index(serial->minor, serial);
2673
2674 /* setup the proc dirs and files if needed */
2675 hso_log_port(hso_dev);
2676
2677 /* done, return it */
2678 return hso_dev;
2679
2680 exit2:
2681 hso_serial_tty_unregister(serial);
2682 hso_serial_common_free(serial);
2683 exit:
2684 hso_free_tiomget(serial);
2685 kfree(serial);
2686 kfree(hso_dev);
2687 return NULL;
2688 }
2689
2690 /* Creates a multiplexed AT channel */
2691 static
2692 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2693 int port,
2694 struct hso_shared_int *mux)
2695 {
2696 struct hso_device *hso_dev;
2697 struct hso_serial *serial;
2698 int port_spec;
2699
2700 port_spec = HSO_INTF_MUX;
2701 port_spec &= ~HSO_PORT_MASK;
2702
2703 port_spec |= hso_mux_to_port(port);
2704 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2705 return NULL;
2706
2707 hso_dev = hso_create_device(interface, port_spec);
2708 if (!hso_dev)
2709 return NULL;
2710
2711 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2712 if (!serial)
2713 goto exit;
2714
2715 hso_dev->port_data.dev_serial = serial;
2716 serial->parent = hso_dev;
2717
2718 if (hso_serial_common_create
2719 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2720 goto exit;
2721
2722 serial->tx_data_length--;
2723 serial->write_data = hso_mux_serial_write_data;
2724
2725 serial->shared_int = mux;
2726 mutex_lock(&serial->shared_int->shared_int_lock);
2727 serial->shared_int->ref_count++;
2728 mutex_unlock(&serial->shared_int->shared_int_lock);
2729
2730 /* and record this serial */
2731 set_serial_by_index(serial->minor, serial);
2732
2733 /* setup the proc dirs and files if needed */
2734 hso_log_port(hso_dev);
2735
2736 /* done, return it */
2737 return hso_dev;
2738
2739 exit:
2740 if (serial) {
2741 tty_unregister_device(tty_drv, serial->minor);
2742 kfree(serial);
2743 }
2744 kfree(hso_dev);
2745 return NULL;
2746
2747 }
2748
2749 static void hso_free_shared_int(struct hso_shared_int *mux)
2750 {
2751 usb_free_urb(mux->shared_intr_urb);
2752 kfree(mux->shared_intr_buf);
2753 mutex_unlock(&mux->shared_int_lock);
2754 kfree(mux);
2755 }
2756
2757 static
2758 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2759 {
2760 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2761
2762 if (!mux)
2763 return NULL;
2764
2765 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2766 USB_DIR_IN);
2767 if (!mux->intr_endp) {
2768 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2769 goto exit;
2770 }
2771
2772 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2773 if (!mux->shared_intr_urb)
2774 goto exit;
2775 mux->shared_intr_buf =
2776 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2777 GFP_KERNEL);
2778 if (!mux->shared_intr_buf)
2779 goto exit;
2780
2781 mutex_init(&mux->shared_int_lock);
2782
2783 return mux;
2784
2785 exit:
2786 kfree(mux->shared_intr_buf);
2787 usb_free_urb(mux->shared_intr_urb);
2788 kfree(mux);
2789 return NULL;
2790 }
2791
2792 /* Gets the port spec for a certain interface */
2793 static int hso_get_config_data(struct usb_interface *interface)
2794 {
2795 struct usb_device *usbdev = interface_to_usbdev(interface);
2796 u8 *config_data = kmalloc(17, GFP_KERNEL);
2797 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2798 s32 result;
2799
2800 if (!config_data)
2801 return -ENOMEM;
2802 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2803 0x86, 0xC0, 0, 0, config_data, 17,
2804 USB_CTRL_SET_TIMEOUT) != 0x11) {
2805 kfree(config_data);
2806 return -EIO;
2807 }
2808
2809 switch (config_data[if_num]) {
2810 case 0x0:
2811 result = 0;
2812 break;
2813 case 0x1:
2814 result = HSO_PORT_DIAG;
2815 break;
2816 case 0x2:
2817 result = HSO_PORT_GPS;
2818 break;
2819 case 0x3:
2820 result = HSO_PORT_GPS_CONTROL;
2821 break;
2822 case 0x4:
2823 result = HSO_PORT_APP;
2824 break;
2825 case 0x5:
2826 result = HSO_PORT_APP2;
2827 break;
2828 case 0x6:
2829 result = HSO_PORT_CONTROL;
2830 break;
2831 case 0x7:
2832 result = HSO_PORT_NETWORK;
2833 break;
2834 case 0x8:
2835 result = HSO_PORT_MODEM;
2836 break;
2837 case 0x9:
2838 result = HSO_PORT_MSD;
2839 break;
2840 case 0xa:
2841 result = HSO_PORT_PCSC;
2842 break;
2843 case 0xb:
2844 result = HSO_PORT_VOICE;
2845 break;
2846 default:
2847 result = 0;
2848 }
2849
2850 if (result)
2851 result |= HSO_INTF_BULK;
2852
2853 if (config_data[16] & 0x1)
2854 result |= HSO_INFO_CRC_BUG;
2855
2856 kfree(config_data);
2857 return result;
2858 }
2859
2860 /* called once for each interface upon device insertion */
2861 static int hso_probe(struct usb_interface *interface,
2862 const struct usb_device_id *id)
2863 {
2864 int mux, i, if_num, port_spec;
2865 unsigned char port_mask;
2866 struct hso_device *hso_dev = NULL;
2867 struct hso_shared_int *shared_int;
2868 struct hso_device *tmp_dev = NULL;
2869
2870 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2871 dev_err(&interface->dev, "Not our interface\n");
2872 return -ENODEV;
2873 }
2874
2875 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2876
2877 /* Get the interface/port specification from either driver_info or from
2878 * the device itself */
2879 if (id->driver_info)
2880 port_spec = ((u32 *)(id->driver_info))[if_num];
2881 else
2882 port_spec = hso_get_config_data(interface);
2883
2884 /* Check if we need to switch to alt interfaces prior to port
2885 * configuration */
2886 if (interface->num_altsetting > 1)
2887 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2888 interface->needs_remote_wakeup = 1;
2889
2890 /* Allocate new hso device(s) */
2891 switch (port_spec & HSO_INTF_MASK) {
2892 case HSO_INTF_MUX:
2893 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2894 /* Create the network device */
2895 if (!disable_net) {
2896 hso_dev = hso_create_net_device(interface,
2897 port_spec);
2898 if (!hso_dev)
2899 goto exit;
2900 tmp_dev = hso_dev;
2901 }
2902 }
2903
2904 if (hso_get_mux_ports(interface, &port_mask))
2905 /* TODO: de-allocate everything */
2906 goto exit;
2907
2908 shared_int = hso_create_shared_int(interface);
2909 if (!shared_int)
2910 goto exit;
2911
2912 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2913 if (port_mask & i) {
2914 hso_dev = hso_create_mux_serial_device(
2915 interface, i, shared_int);
2916 if (!hso_dev)
2917 goto exit;
2918 }
2919 }
2920
2921 if (tmp_dev)
2922 hso_dev = tmp_dev;
2923 break;
2924
2925 case HSO_INTF_BULK:
2926 /* It's a regular bulk interface */
2927 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2928 if (!disable_net)
2929 hso_dev =
2930 hso_create_net_device(interface, port_spec);
2931 } else {
2932 hso_dev =
2933 hso_create_bulk_serial_device(interface, port_spec);
2934 }
2935 if (!hso_dev)
2936 goto exit;
2937 break;
2938 default:
2939 goto exit;
2940 }
2941
2942 /* save our data pointer in this device */
2943 usb_set_intfdata(interface, hso_dev);
2944
2945 /* done */
2946 return 0;
2947 exit:
2948 hso_free_interface(interface);
2949 return -ENODEV;
2950 }
2951
2952 /* device removed, cleaning up */
2953 static void hso_disconnect(struct usb_interface *interface)
2954 {
2955 hso_free_interface(interface);
2956
2957 /* remove reference of our private data */
2958 usb_set_intfdata(interface, NULL);
2959 }
2960
2961 static void async_get_intf(struct work_struct *data)
2962 {
2963 struct hso_device *hso_dev =
2964 container_of(data, struct hso_device, async_get_intf);
2965 usb_autopm_get_interface(hso_dev->interface);
2966 }
2967
2968 static void async_put_intf(struct work_struct *data)
2969 {
2970 struct hso_device *hso_dev =
2971 container_of(data, struct hso_device, async_put_intf);
2972 usb_autopm_put_interface(hso_dev->interface);
2973 }
2974
2975 static int hso_get_activity(struct hso_device *hso_dev)
2976 {
2977 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2978 if (!hso_dev->is_active) {
2979 hso_dev->is_active = 1;
2980 schedule_work(&hso_dev->async_get_intf);
2981 }
2982 }
2983
2984 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2985 return -EAGAIN;
2986
2987 usb_mark_last_busy(hso_dev->usb);
2988
2989 return 0;
2990 }
2991
2992 static int hso_put_activity(struct hso_device *hso_dev)
2993 {
2994 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2995 if (hso_dev->is_active) {
2996 hso_dev->is_active = 0;
2997 schedule_work(&hso_dev->async_put_intf);
2998 return -EAGAIN;
2999 }
3000 }
3001 hso_dev->is_active = 0;
3002 return 0;
3003 }
3004
3005 /* called by kernel when we need to suspend device */
3006 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3007 {
3008 int i, result;
3009
3010 /* Stop all serial ports */
3011 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3012 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3013 result = hso_stop_serial_device(serial_table[i]);
3014 if (result)
3015 goto out;
3016 }
3017 }
3018
3019 /* Stop all network ports */
3020 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3021 if (network_table[i] &&
3022 (network_table[i]->interface == iface)) {
3023 result = hso_stop_net_device(network_table[i]);
3024 if (result)
3025 goto out;
3026 }
3027 }
3028
3029 out:
3030 return 0;
3031 }
3032
3033 /* called by kernel when we need to resume device */
3034 static int hso_resume(struct usb_interface *iface)
3035 {
3036 int i, result = 0;
3037 struct hso_net *hso_net;
3038
3039 /* Start all serial ports */
3040 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3041 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3042 if (dev2ser(serial_table[i])->port.count) {
3043 result =
3044 hso_start_serial_device(serial_table[i], GFP_NOIO);
3045 hso_kick_transmit(dev2ser(serial_table[i]));
3046 if (result)
3047 goto out;
3048 }
3049 }
3050 }
3051
3052 /* Start all network ports */
3053 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3054 if (network_table[i] &&
3055 (network_table[i]->interface == iface)) {
3056 hso_net = dev2net(network_table[i]);
3057 if (hso_net->flags & IFF_UP) {
3058 /* First transmit any lingering data,
3059 then restart the device. */
3060 if (hso_net->skb_tx_buf) {
3061 dev_dbg(&iface->dev,
3062 "Transmitting"
3063 " lingering data\n");
3064 hso_net_start_xmit(hso_net->skb_tx_buf,
3065 hso_net->net);
3066 hso_net->skb_tx_buf = NULL;
3067 }
3068 result = hso_start_net_device(network_table[i]);
3069 if (result)
3070 goto out;
3071 }
3072 }
3073 }
3074
3075 out:
3076 return result;
3077 }
3078
3079 static void hso_serial_ref_free(struct kref *ref)
3080 {
3081 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3082
3083 hso_free_serial_device(hso_dev);
3084 }
3085
3086 static void hso_free_interface(struct usb_interface *interface)
3087 {
3088 struct hso_serial *serial;
3089 int i;
3090
3091 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3092 if (serial_table[i] &&
3093 (serial_table[i]->interface == interface)) {
3094 serial = dev2ser(serial_table[i]);
3095 tty_port_tty_hangup(&serial->port, false);
3096 mutex_lock(&serial->parent->mutex);
3097 serial->parent->usb_gone = 1;
3098 mutex_unlock(&serial->parent->mutex);
3099 cancel_work_sync(&serial_table[i]->async_put_intf);
3100 cancel_work_sync(&serial_table[i]->async_get_intf);
3101 hso_serial_tty_unregister(serial);
3102 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3103 set_serial_by_index(i, NULL);
3104 }
3105 }
3106
3107 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3108 if (network_table[i] &&
3109 (network_table[i]->interface == interface)) {
3110 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3111 /* hso_stop_net_device doesn't stop the net queue since
3112 * traffic needs to start it again when suspended */
3113 netif_stop_queue(dev2net(network_table[i])->net);
3114 hso_stop_net_device(network_table[i]);
3115 cancel_work_sync(&network_table[i]->async_put_intf);
3116 cancel_work_sync(&network_table[i]->async_get_intf);
3117 if (rfk) {
3118 rfkill_unregister(rfk);
3119 rfkill_destroy(rfk);
3120 }
3121 hso_free_net_device(network_table[i]);
3122 }
3123 }
3124 }
3125
3126 /* Helper functions */
3127
3128 /* Get the endpoint ! */
3129 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3130 int type, int dir)
3131 {
3132 int i;
3133 struct usb_host_interface *iface = intf->cur_altsetting;
3134 struct usb_endpoint_descriptor *endp;
3135
3136 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3137 endp = &iface->endpoint[i].desc;
3138 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3139 (usb_endpoint_type(endp) == type))
3140 return endp;
3141 }
3142
3143 return NULL;
3144 }
3145
3146 /* Get the byte that describes which ports are enabled */
3147 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3148 {
3149 int i;
3150 struct usb_host_interface *iface = intf->cur_altsetting;
3151
3152 if (iface->extralen == 3) {
3153 *ports = iface->extra[2];
3154 return 0;
3155 }
3156
3157 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3158 if (iface->endpoint[i].extralen == 3) {
3159 *ports = iface->endpoint[i].extra[2];
3160 return 0;
3161 }
3162 }
3163
3164 return -1;
3165 }
3166
3167 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3168 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3169 struct usb_device *usb, gfp_t gfp)
3170 {
3171 int result;
3172
3173 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3174 usb_rcvintpipe(usb,
3175 shared_int->intr_endp->bEndpointAddress & 0x7F),
3176 shared_int->shared_intr_buf,
3177 1,
3178 intr_callback, shared_int,
3179 shared_int->intr_endp->bInterval);
3180
3181 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3182 if (result)
3183 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3184 result);
3185
3186 return result;
3187 }
3188
3189 /* operations setup of the serial interface */
3190 static const struct tty_operations hso_serial_ops = {
3191 .open = hso_serial_open,
3192 .close = hso_serial_close,
3193 .write = hso_serial_write,
3194 .write_room = hso_serial_write_room,
3195 .cleanup = hso_serial_cleanup,
3196 .ioctl = hso_serial_ioctl,
3197 .set_termios = hso_serial_set_termios,
3198 .chars_in_buffer = hso_serial_chars_in_buffer,
3199 .tiocmget = hso_serial_tiocmget,
3200 .tiocmset = hso_serial_tiocmset,
3201 .get_icount = hso_get_count,
3202 .unthrottle = hso_unthrottle
3203 };
3204
3205 static struct usb_driver hso_driver = {
3206 .name = driver_name,
3207 .probe = hso_probe,
3208 .disconnect = hso_disconnect,
3209 .id_table = hso_ids,
3210 .suspend = hso_suspend,
3211 .resume = hso_resume,
3212 .reset_resume = hso_resume,
3213 .supports_autosuspend = 1,
3214 .disable_hub_initiated_lpm = 1,
3215 };
3216
3217 static int __init hso_init(void)
3218 {
3219 int i;
3220 int result;
3221
3222 /* put it in the log */
3223 pr_info("%s\n", version);
3224
3225 /* Initialise the serial table semaphore and table */
3226 spin_lock_init(&serial_table_lock);
3227 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3228 serial_table[i] = NULL;
3229
3230 /* allocate our driver using the proper amount of supported minors */
3231 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3232 if (!tty_drv)
3233 return -ENOMEM;
3234
3235 /* fill in all needed values */
3236 tty_drv->driver_name = driver_name;
3237 tty_drv->name = tty_filename;
3238
3239 /* if major number is provided as parameter, use that one */
3240 if (tty_major)
3241 tty_drv->major = tty_major;
3242
3243 tty_drv->minor_start = 0;
3244 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3245 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3246 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3247 tty_drv->init_termios = tty_std_termios;
3248 hso_init_termios(&tty_drv->init_termios);
3249 tty_set_operations(tty_drv, &hso_serial_ops);
3250
3251 /* register the tty driver */
3252 result = tty_register_driver(tty_drv);
3253 if (result) {
3254 pr_err("%s - tty_register_driver failed(%d)\n",
3255 __func__, result);
3256 goto err_free_tty;
3257 }
3258
3259 /* register this module as an usb driver */
3260 result = usb_register(&hso_driver);
3261 if (result) {
3262 pr_err("Could not register hso driver - error: %d\n", result);
3263 goto err_unreg_tty;
3264 }
3265
3266 /* done */
3267 return 0;
3268 err_unreg_tty:
3269 tty_unregister_driver(tty_drv);
3270 err_free_tty:
3271 put_tty_driver(tty_drv);
3272 return result;
3273 }
3274
3275 static void __exit hso_exit(void)
3276 {
3277 pr_info("unloaded\n");
3278
3279 tty_unregister_driver(tty_drv);
3280 /* deregister the usb driver */
3281 usb_deregister(&hso_driver);
3282 put_tty_driver(tty_drv);
3283 }
3284
3285 /* Module definitions */
3286 module_init(hso_init);
3287 module_exit(hso_exit);
3288
3289 MODULE_AUTHOR(MOD_AUTHOR);
3290 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3291 MODULE_LICENSE(MOD_LICENSE);
3292
3293 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3294 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3295 module_param(debug, int, S_IRUGO | S_IWUSR);
3296
3297 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3298 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3299 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3300
3301 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3302 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3303 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Ubuntu Artful kernel mirror