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
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define hso_dbg(lvl, fmt, ...) \
113 do { \
114 if ((lvl) & debug) \
115 pr_info("[%d:%s] " fmt, \
116 __LINE__, __func__, ##__VA_ARGS__); \
117 } while (0)
118
119 /*****************************************************************************/
120 /* Enumerators */
121 /*****************************************************************************/
122 enum pkt_parse_state {
123 WAIT_IP,
124 WAIT_DATA,
125 WAIT_SYNC
126 };
127
128 /*****************************************************************************/
129 /* Structs */
130 /*****************************************************************************/
131
132 struct hso_shared_int {
133 struct usb_endpoint_descriptor *intr_endp;
134 void *shared_intr_buf;
135 struct urb *shared_intr_urb;
136 struct usb_device *usb;
137 int use_count;
138 int ref_count;
139 struct mutex shared_int_lock;
140 };
141
142 struct hso_net {
143 struct hso_device *parent;
144 struct net_device *net;
145 struct rfkill *rfkill;
146 char name[24];
147
148 struct usb_endpoint_descriptor *in_endp;
149 struct usb_endpoint_descriptor *out_endp;
150
151 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
152 struct urb *mux_bulk_tx_urb;
153 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
154 void *mux_bulk_tx_buf;
155
156 struct sk_buff *skb_rx_buf;
157 struct sk_buff *skb_tx_buf;
158
159 enum pkt_parse_state rx_parse_state;
160 spinlock_t net_lock;
161
162 unsigned short rx_buf_size;
163 unsigned short rx_buf_missing;
164 struct iphdr rx_ip_hdr;
165
166 unsigned long flags;
167 };
168
169 enum rx_ctrl_state{
170 RX_IDLE,
171 RX_SENT,
172 RX_PENDING
173 };
174
175 #define BM_REQUEST_TYPE (0xa1)
176 #define B_NOTIFICATION (0x20)
177 #define W_VALUE (0x0)
178 #define W_LENGTH (0x2)
179
180 #define B_OVERRUN (0x1<<6)
181 #define B_PARITY (0x1<<5)
182 #define B_FRAMING (0x1<<4)
183 #define B_RING_SIGNAL (0x1<<3)
184 #define B_BREAK (0x1<<2)
185 #define B_TX_CARRIER (0x1<<1)
186 #define B_RX_CARRIER (0x1<<0)
187
188 struct hso_serial_state_notification {
189 u8 bmRequestType;
190 u8 bNotification;
191 u16 wValue;
192 u16 wIndex;
193 u16 wLength;
194 u16 UART_state_bitmap;
195 } __packed;
196
197 struct hso_tiocmget {
198 struct mutex mutex;
199 wait_queue_head_t waitq;
200 int intr_completed;
201 struct usb_endpoint_descriptor *endp;
202 struct urb *urb;
203 struct hso_serial_state_notification serial_state_notification;
204 u16 prev_UART_state_bitmap;
205 struct uart_icount icount;
206 };
207
208
209 struct hso_serial {
210 struct hso_device *parent;
211 int magic;
212 u8 minor;
213
214 struct hso_shared_int *shared_int;
215
216 /* rx/tx urb could be either a bulk urb or a control urb depending
217 on which serial port it is used on. */
218 struct urb *rx_urb[MAX_RX_URBS];
219 u8 num_rx_urbs;
220 u8 *rx_data[MAX_RX_URBS];
221 u16 rx_data_length; /* should contain allocated length */
222
223 struct urb *tx_urb;
224 u8 *tx_data;
225 u8 *tx_buffer;
226 u16 tx_data_length; /* should contain allocated length */
227 u16 tx_data_count;
228 u16 tx_buffer_count;
229 struct usb_ctrlrequest ctrl_req_tx;
230 struct usb_ctrlrequest ctrl_req_rx;
231
232 struct usb_endpoint_descriptor *in_endp;
233 struct usb_endpoint_descriptor *out_endp;
234
235 enum rx_ctrl_state rx_state;
236 u8 rts_state;
237 u8 dtr_state;
238 unsigned tx_urb_used:1;
239
240 struct tty_port port;
241 /* from usb_serial_port */
242 spinlock_t serial_lock;
243
244 int (*write_data) (struct hso_serial *serial);
245 struct hso_tiocmget *tiocmget;
246 /* Hacks required to get flow control
247 * working on the serial receive buffers
248 * so as not to drop characters on the floor.
249 */
250 int curr_rx_urb_idx;
251 u8 rx_urb_filled[MAX_RX_URBS];
252 struct tasklet_struct unthrottle_tasklet;
253 };
254
255 struct hso_device {
256 union {
257 struct hso_serial *dev_serial;
258 struct hso_net *dev_net;
259 } port_data;
260
261 u32 port_spec;
262
263 u8 is_active;
264 u8 usb_gone;
265 struct work_struct async_get_intf;
266 struct work_struct async_put_intf;
267
268 struct usb_device *usb;
269 struct usb_interface *interface;
270
271 struct device *dev;
272 struct kref ref;
273 struct mutex mutex;
274 };
275
276 /* Type of interface */
277 #define HSO_INTF_MASK 0xFF00
278 #define HSO_INTF_MUX 0x0100
279 #define HSO_INTF_BULK 0x0200
280
281 /* Type of port */
282 #define HSO_PORT_MASK 0xFF
283 #define HSO_PORT_NO_PORT 0x0
284 #define HSO_PORT_CONTROL 0x1
285 #define HSO_PORT_APP 0x2
286 #define HSO_PORT_GPS 0x3
287 #define HSO_PORT_PCSC 0x4
288 #define HSO_PORT_APP2 0x5
289 #define HSO_PORT_GPS_CONTROL 0x6
290 #define HSO_PORT_MSD 0x7
291 #define HSO_PORT_VOICE 0x8
292 #define HSO_PORT_DIAG2 0x9
293 #define HSO_PORT_DIAG 0x10
294 #define HSO_PORT_MODEM 0x11
295 #define HSO_PORT_NETWORK 0x12
296
297 /* Additional device info */
298 #define HSO_INFO_MASK 0xFF000000
299 #define HSO_INFO_CRC_BUG 0x01000000
300
301 /*****************************************************************************/
302 /* Prototypes */
303 /*****************************************************************************/
304 /* Serial driver functions */
305 static int hso_serial_tiocmset(struct tty_struct *tty,
306 unsigned int set, unsigned int clear);
307 static void ctrl_callback(struct urb *urb);
308 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
309 static void hso_kick_transmit(struct hso_serial *serial);
310 /* Helper functions */
311 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
312 struct usb_device *usb, gfp_t gfp);
313 static void handle_usb_error(int status, const char *function,
314 struct hso_device *hso_dev);
315 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
316 int type, int dir);
317 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
318 static void hso_free_interface(struct usb_interface *intf);
319 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
320 static int hso_stop_serial_device(struct hso_device *hso_dev);
321 static int hso_start_net_device(struct hso_device *hso_dev);
322 static void hso_free_shared_int(struct hso_shared_int *shared_int);
323 static int hso_stop_net_device(struct hso_device *hso_dev);
324 static void hso_serial_ref_free(struct kref *ref);
325 static void hso_std_serial_read_bulk_callback(struct urb *urb);
326 static int hso_mux_serial_read(struct hso_serial *serial);
327 static void async_get_intf(struct work_struct *data);
328 static void async_put_intf(struct work_struct *data);
329 static int hso_put_activity(struct hso_device *hso_dev);
330 static int hso_get_activity(struct hso_device *hso_dev);
331 static void tiocmget_intr_callback(struct urb *urb);
332 /*****************************************************************************/
333 /* Helping functions */
334 /*****************************************************************************/
335
336 /* #define DEBUG */
337
dev2net(struct hso_device * hso_dev)338 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
339 {
340 return hso_dev->port_data.dev_net;
341 }
342
dev2ser(struct hso_device * hso_dev)343 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
344 {
345 return hso_dev->port_data.dev_serial;
346 }
347
348 /* Debugging functions */
349 #ifdef DEBUG
dbg_dump(int line_count,const char * func_name,unsigned char * buf,unsigned int len)350 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
351 unsigned int len)
352 {
353 static char name[255];
354
355 sprintf(name, "hso[%d:%s]", line_count, func_name);
356 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
357 }
358
359 #define DUMP(buf_, len_) \
360 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
361
362 #define DUMP1(buf_, len_) \
363 do { \
364 if (0x01 & debug) \
365 DUMP(buf_, len_); \
366 } while (0)
367 #else
368 #define DUMP(buf_, len_)
369 #define DUMP1(buf_, len_)
370 #endif
371
372 /* module parameters */
373 static int debug;
374 static int tty_major;
375 static int disable_net;
376
377 /* driver info */
378 static const char driver_name[] = "hso";
379 static const char tty_filename[] = "ttyHS";
380 static const char *version = __FILE__ ": " MOD_AUTHOR;
381 /* the usb driver itself (registered in hso_init) */
382 static struct usb_driver hso_driver;
383 /* serial structures */
384 static struct tty_driver *tty_drv;
385 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
386 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
387 static spinlock_t serial_table_lock;
388
389 static const s32 default_port_spec[] = {
390 HSO_INTF_MUX | HSO_PORT_NETWORK,
391 HSO_INTF_BULK | HSO_PORT_DIAG,
392 HSO_INTF_BULK | HSO_PORT_MODEM,
393 0
394 };
395
396 static const s32 icon321_port_spec[] = {
397 HSO_INTF_MUX | HSO_PORT_NETWORK,
398 HSO_INTF_BULK | HSO_PORT_DIAG2,
399 HSO_INTF_BULK | HSO_PORT_MODEM,
400 HSO_INTF_BULK | HSO_PORT_DIAG,
401 0
402 };
403
404 #define default_port_device(vendor, product) \
405 USB_DEVICE(vendor, product), \
406 .driver_info = (kernel_ulong_t)default_port_spec
407
408 #define icon321_port_device(vendor, product) \
409 USB_DEVICE(vendor, product), \
410 .driver_info = (kernel_ulong_t)icon321_port_spec
411
412 /* list of devices we support */
413 static const struct usb_device_id hso_ids[] = {
414 {default_port_device(0x0af0, 0x6711)},
415 {default_port_device(0x0af0, 0x6731)},
416 {default_port_device(0x0af0, 0x6751)},
417 {default_port_device(0x0af0, 0x6771)},
418 {default_port_device(0x0af0, 0x6791)},
419 {default_port_device(0x0af0, 0x6811)},
420 {default_port_device(0x0af0, 0x6911)},
421 {default_port_device(0x0af0, 0x6951)},
422 {default_port_device(0x0af0, 0x6971)},
423 {default_port_device(0x0af0, 0x7011)},
424 {default_port_device(0x0af0, 0x7031)},
425 {default_port_device(0x0af0, 0x7051)},
426 {default_port_device(0x0af0, 0x7071)},
427 {default_port_device(0x0af0, 0x7111)},
428 {default_port_device(0x0af0, 0x7211)},
429 {default_port_device(0x0af0, 0x7251)},
430 {default_port_device(0x0af0, 0x7271)},
431 {default_port_device(0x0af0, 0x7311)},
432 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
433 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
434 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
435 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
436 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
437 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
438 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
439 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
440 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
441 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
442 {USB_DEVICE(0x0af0, 0x7701)},
443 {USB_DEVICE(0x0af0, 0x7706)},
444 {USB_DEVICE(0x0af0, 0x7801)},
445 {USB_DEVICE(0x0af0, 0x7901)},
446 {USB_DEVICE(0x0af0, 0x7A01)},
447 {USB_DEVICE(0x0af0, 0x7A05)},
448 {USB_DEVICE(0x0af0, 0x8200)},
449 {USB_DEVICE(0x0af0, 0x8201)},
450 {USB_DEVICE(0x0af0, 0x8300)},
451 {USB_DEVICE(0x0af0, 0x8302)},
452 {USB_DEVICE(0x0af0, 0x8304)},
453 {USB_DEVICE(0x0af0, 0x8400)},
454 {USB_DEVICE(0x0af0, 0x8600)},
455 {USB_DEVICE(0x0af0, 0x8800)},
456 {USB_DEVICE(0x0af0, 0x8900)},
457 {USB_DEVICE(0x0af0, 0x9000)},
458 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
459 {USB_DEVICE(0x0af0, 0xd035)},
460 {USB_DEVICE(0x0af0, 0xd055)},
461 {USB_DEVICE(0x0af0, 0xd155)},
462 {USB_DEVICE(0x0af0, 0xd255)},
463 {USB_DEVICE(0x0af0, 0xd057)},
464 {USB_DEVICE(0x0af0, 0xd157)},
465 {USB_DEVICE(0x0af0, 0xd257)},
466 {USB_DEVICE(0x0af0, 0xd357)},
467 {USB_DEVICE(0x0af0, 0xd058)},
468 {USB_DEVICE(0x0af0, 0xc100)},
469 {}
470 };
471 MODULE_DEVICE_TABLE(usb, hso_ids);
472
473 /* Sysfs attribute */
hso_sysfs_show_porttype(struct device * dev,struct device_attribute * attr,char * buf)474 static ssize_t hso_sysfs_show_porttype(struct device *dev,
475 struct device_attribute *attr,
476 char *buf)
477 {
478 struct hso_device *hso_dev = dev_get_drvdata(dev);
479 char *port_name;
480
481 if (!hso_dev)
482 return 0;
483
484 switch (hso_dev->port_spec & HSO_PORT_MASK) {
485 case HSO_PORT_CONTROL:
486 port_name = "Control";
487 break;
488 case HSO_PORT_APP:
489 port_name = "Application";
490 break;
491 case HSO_PORT_APP2:
492 port_name = "Application2";
493 break;
494 case HSO_PORT_GPS:
495 port_name = "GPS";
496 break;
497 case HSO_PORT_GPS_CONTROL:
498 port_name = "GPS Control";
499 break;
500 case HSO_PORT_PCSC:
501 port_name = "PCSC";
502 break;
503 case HSO_PORT_DIAG:
504 port_name = "Diagnostic";
505 break;
506 case HSO_PORT_DIAG2:
507 port_name = "Diagnostic2";
508 break;
509 case HSO_PORT_MODEM:
510 port_name = "Modem";
511 break;
512 case HSO_PORT_NETWORK:
513 port_name = "Network";
514 break;
515 default:
516 port_name = "Unknown";
517 break;
518 }
519
520 return sprintf(buf, "%s\n", port_name);
521 }
522 static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
523
524 static struct attribute *hso_serial_dev_attrs[] = {
525 &dev_attr_hsotype.attr,
526 NULL
527 };
528
529 ATTRIBUTE_GROUPS(hso_serial_dev);
530
hso_urb_to_index(struct hso_serial * serial,struct urb * urb)531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
532 {
533 int idx;
534
535 for (idx = 0; idx < serial->num_rx_urbs; idx++)
536 if (serial->rx_urb[idx] == urb)
537 return idx;
538 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
539 return -1;
540 }
541
542 /* converts mux value to a port spec value */
hso_mux_to_port(int mux)543 static u32 hso_mux_to_port(int mux)
544 {
545 u32 result;
546
547 switch (mux) {
548 case 0x1:
549 result = HSO_PORT_CONTROL;
550 break;
551 case 0x2:
552 result = HSO_PORT_APP;
553 break;
554 case 0x4:
555 result = HSO_PORT_PCSC;
556 break;
557 case 0x8:
558 result = HSO_PORT_GPS;
559 break;
560 case 0x10:
561 result = HSO_PORT_APP2;
562 break;
563 default:
564 result = HSO_PORT_NO_PORT;
565 }
566 return result;
567 }
568
569 /* converts port spec value to a mux value */
hso_port_to_mux(int port)570 static u32 hso_port_to_mux(int port)
571 {
572 u32 result;
573
574 switch (port & HSO_PORT_MASK) {
575 case HSO_PORT_CONTROL:
576 result = 0x0;
577 break;
578 case HSO_PORT_APP:
579 result = 0x1;
580 break;
581 case HSO_PORT_PCSC:
582 result = 0x2;
583 break;
584 case HSO_PORT_GPS:
585 result = 0x3;
586 break;
587 case HSO_PORT_APP2:
588 result = 0x4;
589 break;
590 default:
591 result = 0x0;
592 }
593 return result;
594 }
595
get_serial_by_shared_int_and_type(struct hso_shared_int * shared_int,int mux)596 static struct hso_serial *get_serial_by_shared_int_and_type(
597 struct hso_shared_int *shared_int,
598 int mux)
599 {
600 int i, port;
601
602 port = hso_mux_to_port(mux);
603
604 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
605 if (serial_table[i] &&
606 (dev2ser(serial_table[i])->shared_int == shared_int) &&
607 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
608 return dev2ser(serial_table[i]);
609 }
610 }
611
612 return NULL;
613 }
614
get_serial_by_index(unsigned index)615 static struct hso_serial *get_serial_by_index(unsigned index)
616 {
617 struct hso_serial *serial = NULL;
618 unsigned long flags;
619
620 spin_lock_irqsave(&serial_table_lock, flags);
621 if (serial_table[index])
622 serial = dev2ser(serial_table[index]);
623 spin_unlock_irqrestore(&serial_table_lock, flags);
624
625 return serial;
626 }
627
get_free_serial_index(void)628 static int get_free_serial_index(void)
629 {
630 int index;
631 unsigned long flags;
632
633 spin_lock_irqsave(&serial_table_lock, flags);
634 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
635 if (serial_table[index] == NULL) {
636 spin_unlock_irqrestore(&serial_table_lock, flags);
637 return index;
638 }
639 }
640 spin_unlock_irqrestore(&serial_table_lock, flags);
641
642 pr_err("%s: no free serial devices in table\n", __func__);
643 return -1;
644 }
645
set_serial_by_index(unsigned index,struct hso_serial * serial)646 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
647 {
648 unsigned long flags;
649
650 spin_lock_irqsave(&serial_table_lock, flags);
651 if (serial)
652 serial_table[index] = serial->parent;
653 else
654 serial_table[index] = NULL;
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656 }
657
handle_usb_error(int status,const char * function,struct hso_device * hso_dev)658 static void handle_usb_error(int status, const char *function,
659 struct hso_device *hso_dev)
660 {
661 char *explanation;
662
663 switch (status) {
664 case -ENODEV:
665 explanation = "no device";
666 break;
667 case -ENOENT:
668 explanation = "endpoint not enabled";
669 break;
670 case -EPIPE:
671 explanation = "endpoint stalled";
672 break;
673 case -ENOSPC:
674 explanation = "not enough bandwidth";
675 break;
676 case -ESHUTDOWN:
677 explanation = "device disabled";
678 break;
679 case -EHOSTUNREACH:
680 explanation = "device suspended";
681 break;
682 case -EINVAL:
683 case -EAGAIN:
684 case -EFBIG:
685 case -EMSGSIZE:
686 explanation = "internal error";
687 break;
688 case -EILSEQ:
689 case -EPROTO:
690 case -ETIME:
691 case -ETIMEDOUT:
692 explanation = "protocol error";
693 if (hso_dev)
694 usb_queue_reset_device(hso_dev->interface);
695 break;
696 default:
697 explanation = "unknown status";
698 break;
699 }
700
701 /* log a meaningful explanation of an USB status */
702 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
703 function, explanation, status);
704 }
705
706 /* Network interface functions */
707
708 /* called when net interface is brought up by ifconfig */
hso_net_open(struct net_device * net)709 static int hso_net_open(struct net_device *net)
710 {
711 struct hso_net *odev = netdev_priv(net);
712 unsigned long flags = 0;
713
714 if (!odev) {
715 dev_err(&net->dev, "No net device !\n");
716 return -ENODEV;
717 }
718
719 odev->skb_tx_buf = NULL;
720
721 /* setup environment */
722 spin_lock_irqsave(&odev->net_lock, flags);
723 odev->rx_parse_state = WAIT_IP;
724 odev->rx_buf_size = 0;
725 odev->rx_buf_missing = sizeof(struct iphdr);
726 spin_unlock_irqrestore(&odev->net_lock, flags);
727
728 /* We are up and running. */
729 set_bit(HSO_NET_RUNNING, &odev->flags);
730 hso_start_net_device(odev->parent);
731
732 /* Tell the kernel we are ready to start receiving from it */
733 netif_start_queue(net);
734
735 return 0;
736 }
737
738 /* called when interface is brought down by ifconfig */
hso_net_close(struct net_device * net)739 static int hso_net_close(struct net_device *net)
740 {
741 struct hso_net *odev = netdev_priv(net);
742
743 /* we don't need the queue anymore */
744 netif_stop_queue(net);
745 /* no longer running */
746 clear_bit(HSO_NET_RUNNING, &odev->flags);
747
748 hso_stop_net_device(odev->parent);
749
750 /* done */
751 return 0;
752 }
753
754 /* USB tells is xmit done, we should start the netqueue again */
write_bulk_callback(struct urb * urb)755 static void write_bulk_callback(struct urb *urb)
756 {
757 struct hso_net *odev = urb->context;
758 int status = urb->status;
759
760 /* Sanity check */
761 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
762 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
763 return;
764 }
765
766 /* Do we still have a valid kernel network device? */
767 if (!netif_device_present(odev->net)) {
768 dev_err(&urb->dev->dev, "%s: net device not present\n",
769 __func__);
770 return;
771 }
772
773 /* log status, but don't act on it, we don't need to resubmit anything
774 * anyhow */
775 if (status)
776 handle_usb_error(status, __func__, odev->parent);
777
778 hso_put_activity(odev->parent);
779
780 /* Tell the network interface we are ready for another frame */
781 netif_wake_queue(odev->net);
782 }
783
784 /* called by kernel when we need to transmit a packet */
hso_net_start_xmit(struct sk_buff * skb,struct net_device * net)785 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
786 struct net_device *net)
787 {
788 struct hso_net *odev = netdev_priv(net);
789 int result;
790
791 /* Tell the kernel, "No more frames 'til we are done with this one." */
792 netif_stop_queue(net);
793 if (hso_get_activity(odev->parent) == -EAGAIN) {
794 odev->skb_tx_buf = skb;
795 return NETDEV_TX_OK;
796 }
797
798 /* log if asked */
799 DUMP1(skb->data, skb->len);
800 /* Copy it from kernel memory to OUR memory */
801 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
802 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
803
804 /* Fill in the URB for shipping it out. */
805 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
806 odev->parent->usb,
807 usb_sndbulkpipe(odev->parent->usb,
808 odev->out_endp->
809 bEndpointAddress & 0x7F),
810 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
811 odev);
812
813 /* Deal with the Zero Length packet problem, I hope */
814 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
815
816 /* Send the URB on its merry way. */
817 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
818 if (result) {
819 dev_warn(&odev->parent->interface->dev,
820 "failed mux_bulk_tx_urb %d\n", result);
821 net->stats.tx_errors++;
822 netif_start_queue(net);
823 } else {
824 net->stats.tx_packets++;
825 net->stats.tx_bytes += skb->len;
826 }
827 dev_kfree_skb(skb);
828 /* we're done */
829 return NETDEV_TX_OK;
830 }
831
832 static const struct ethtool_ops ops = {
833 .get_link = ethtool_op_get_link
834 };
835
836 /* called when a packet did not ack after watchdogtimeout */
hso_net_tx_timeout(struct net_device * net)837 static void hso_net_tx_timeout(struct net_device *net)
838 {
839 struct hso_net *odev = netdev_priv(net);
840
841 if (!odev)
842 return;
843
844 /* Tell syslog we are hosed. */
845 dev_warn(&net->dev, "Tx timed out.\n");
846
847 /* Tear the waiting frame off the list */
848 if (odev->mux_bulk_tx_urb &&
849 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
850 usb_unlink_urb(odev->mux_bulk_tx_urb);
851
852 /* Update statistics */
853 net->stats.tx_errors++;
854 }
855
856 /* make a real packet from the received USB buffer */
packetizeRx(struct hso_net * odev,unsigned char * ip_pkt,unsigned int count,unsigned char is_eop)857 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
858 unsigned int count, unsigned char is_eop)
859 {
860 unsigned short temp_bytes;
861 unsigned short buffer_offset = 0;
862 unsigned short frame_len;
863
864 /* log if needed */
865 hso_dbg(0x1, "Rx %d bytes\n", count);
866 DUMP(ip_pkt, min(128, (int)count));
867
868 while (count) {
869 switch (odev->rx_parse_state) {
870 case WAIT_IP:
871 /* waiting for IP header. */
872 /* wanted bytes - size of ip header */
873 temp_bytes =
874 (count <
875 odev->rx_buf_missing) ? count : odev->
876 rx_buf_missing;
877
878 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
879 odev->rx_buf_size, ip_pkt + buffer_offset,
880 temp_bytes);
881
882 odev->rx_buf_size += temp_bytes;
883 buffer_offset += temp_bytes;
884 odev->rx_buf_missing -= temp_bytes;
885 count -= temp_bytes;
886
887 if (!odev->rx_buf_missing) {
888 /* header is complete allocate an sk_buffer and
889 * continue to WAIT_DATA */
890 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
891
892 if ((frame_len > DEFAULT_MRU) ||
893 (frame_len < sizeof(struct iphdr))) {
894 dev_err(&odev->net->dev,
895 "Invalid frame (%d) length\n",
896 frame_len);
897 odev->rx_parse_state = WAIT_SYNC;
898 continue;
899 }
900 /* Allocate an sk_buff */
901 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
902 frame_len);
903 if (!odev->skb_rx_buf) {
904 /* We got no receive buffer. */
905 hso_dbg(0x1, "could not allocate memory\n");
906 odev->rx_parse_state = WAIT_SYNC;
907 continue;
908 }
909
910 /* Copy what we got so far. make room for iphdr
911 * after tail. */
912 skb_put_data(odev->skb_rx_buf,
913 (char *)&(odev->rx_ip_hdr),
914 sizeof(struct iphdr));
915
916 /* ETH_HLEN */
917 odev->rx_buf_size = sizeof(struct iphdr);
918
919 /* Filip actually use .tot_len */
920 odev->rx_buf_missing =
921 frame_len - sizeof(struct iphdr);
922 odev->rx_parse_state = WAIT_DATA;
923 }
924 break;
925
926 case WAIT_DATA:
927 temp_bytes = (count < odev->rx_buf_missing)
928 ? count : odev->rx_buf_missing;
929
930 /* Copy the rest of the bytes that are left in the
931 * buffer into the waiting sk_buf. */
932 /* Make room for temp_bytes after tail. */
933 skb_put_data(odev->skb_rx_buf,
934 ip_pkt + buffer_offset,
935 temp_bytes);
936
937 odev->rx_buf_missing -= temp_bytes;
938 count -= temp_bytes;
939 buffer_offset += temp_bytes;
940 odev->rx_buf_size += temp_bytes;
941 if (!odev->rx_buf_missing) {
942 /* Packet is complete. Inject into stack. */
943 /* We have IP packet here */
944 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
945 skb_reset_mac_header(odev->skb_rx_buf);
946
947 /* Ship it off to the kernel */
948 netif_rx(odev->skb_rx_buf);
949 /* No longer our buffer. */
950 odev->skb_rx_buf = NULL;
951
952 /* update out statistics */
953 odev->net->stats.rx_packets++;
954
955 odev->net->stats.rx_bytes += odev->rx_buf_size;
956
957 odev->rx_buf_size = 0;
958 odev->rx_buf_missing = sizeof(struct iphdr);
959 odev->rx_parse_state = WAIT_IP;
960 }
961 break;
962
963 case WAIT_SYNC:
964 hso_dbg(0x1, " W_S\n");
965 count = 0;
966 break;
967 default:
968 hso_dbg(0x1, "\n");
969 count--;
970 break;
971 }
972 }
973
974 /* Recovery mechanism for WAIT_SYNC state. */
975 if (is_eop) {
976 if (odev->rx_parse_state == WAIT_SYNC) {
977 odev->rx_parse_state = WAIT_IP;
978 odev->rx_buf_size = 0;
979 odev->rx_buf_missing = sizeof(struct iphdr);
980 }
981 }
982 }
983
fix_crc_bug(struct urb * urb,__le16 max_packet_size)984 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
985 {
986 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
987 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
988
989 if (((rest == 5) || (rest == 6)) &&
990 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
991 crc_check, 4)) {
992 urb->actual_length -= 4;
993 }
994 }
995
996 /* Moving data from usb to kernel (in interrupt state) */
read_bulk_callback(struct urb * urb)997 static void read_bulk_callback(struct urb *urb)
998 {
999 struct hso_net *odev = urb->context;
1000 struct net_device *net;
1001 int result;
1002 unsigned long flags;
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_irqsave(&odev->net_lock, flags);
1033 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1034 (urb->transfer_buffer_length >
1035 urb->actual_length) ? 1 : 0);
1036 spin_unlock_irqrestore(&odev->net_lock, flags);
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
hso_init_termios(struct ktermios * termios)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
_hso_serial_set_termios(struct tty_struct * tty,struct ktermios * old)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
hso_resubmit_rx_bulk_urb(struct hso_serial * serial,struct urb * urb)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
put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial * serial)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
put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial * serial)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 */
hso_std_serial_read_bulk_callback(struct urb * urb)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 unsigned long flags;
1198
1199 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1200
1201 /* sanity check */
1202 if (!serial) {
1203 hso_dbg(0x1, "serial == NULL\n");
1204 return;
1205 }
1206 if (status) {
1207 handle_usb_error(status, __func__, serial->parent);
1208 return;
1209 }
1210
1211 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1212 DUMP1(urb->transfer_buffer, urb->actual_length);
1213
1214 /* Anyone listening? */
1215 if (serial->port.count == 0)
1216 return;
1217
1218 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1219 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1220 /* Valid data, handle RX data */
1221 spin_lock_irqsave(&serial->serial_lock, flags);
1222 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1223 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1224 spin_unlock_irqrestore(&serial->serial_lock, flags);
1225 }
1226
1227 /*
1228 * This needs to be a tasklet otherwise we will
1229 * end up recursively calling this function.
1230 */
hso_unthrottle_tasklet(struct hso_serial * serial)1231 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1232 {
1233 unsigned long flags;
1234
1235 spin_lock_irqsave(&serial->serial_lock, flags);
1236 if ((serial->parent->port_spec & HSO_INTF_MUX))
1237 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1238 else
1239 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1240 spin_unlock_irqrestore(&serial->serial_lock, flags);
1241 }
1242
hso_unthrottle(struct tty_struct * tty)1243 static void hso_unthrottle(struct tty_struct *tty)
1244 {
1245 struct hso_serial *serial = tty->driver_data;
1246
1247 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1248 }
1249
1250 /* open the requested serial port */
hso_serial_open(struct tty_struct * tty,struct file * filp)1251 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1252 {
1253 struct hso_serial *serial = get_serial_by_index(tty->index);
1254 int result;
1255
1256 /* sanity check */
1257 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1258 WARN_ON(1);
1259 tty->driver_data = NULL;
1260 hso_dbg(0x1, "Failed to open port\n");
1261 return -ENODEV;
1262 }
1263
1264 mutex_lock(&serial->parent->mutex);
1265 result = usb_autopm_get_interface(serial->parent->interface);
1266 if (result < 0)
1267 goto err_out;
1268
1269 hso_dbg(0x1, "Opening %d\n", serial->minor);
1270
1271 /* setup */
1272 tty->driver_data = serial;
1273 tty_port_tty_set(&serial->port, tty);
1274
1275 /* check for port already opened, if not set the termios */
1276 serial->port.count++;
1277 if (serial->port.count == 1) {
1278 serial->rx_state = RX_IDLE;
1279 /* Force default termio settings */
1280 _hso_serial_set_termios(tty, NULL);
1281 tasklet_init(&serial->unthrottle_tasklet,
1282 (void (*)(unsigned long))hso_unthrottle_tasklet,
1283 (unsigned long)serial);
1284 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1285 if (result) {
1286 hso_stop_serial_device(serial->parent);
1287 serial->port.count--;
1288 } else {
1289 kref_get(&serial->parent->ref);
1290 }
1291 } else {
1292 hso_dbg(0x1, "Port was already open\n");
1293 }
1294
1295 usb_autopm_put_interface(serial->parent->interface);
1296
1297 /* done */
1298 if (result)
1299 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1300 err_out:
1301 mutex_unlock(&serial->parent->mutex);
1302 return result;
1303 }
1304
1305 /* close the requested serial port */
hso_serial_close(struct tty_struct * tty,struct file * filp)1306 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1307 {
1308 struct hso_serial *serial = tty->driver_data;
1309 u8 usb_gone;
1310
1311 hso_dbg(0x1, "Closing serial port\n");
1312
1313 /* Open failed, no close cleanup required */
1314 if (serial == NULL)
1315 return;
1316
1317 mutex_lock(&serial->parent->mutex);
1318 usb_gone = serial->parent->usb_gone;
1319
1320 if (!usb_gone)
1321 usb_autopm_get_interface(serial->parent->interface);
1322
1323 /* reset the rts and dtr */
1324 /* do the actual close */
1325 serial->port.count--;
1326
1327 if (serial->port.count <= 0) {
1328 serial->port.count = 0;
1329 tty_port_tty_set(&serial->port, NULL);
1330 if (!usb_gone)
1331 hso_stop_serial_device(serial->parent);
1332 tasklet_kill(&serial->unthrottle_tasklet);
1333 }
1334
1335 if (!usb_gone)
1336 usb_autopm_put_interface(serial->parent->interface);
1337
1338 mutex_unlock(&serial->parent->mutex);
1339 }
1340
1341 /* close the requested serial port */
hso_serial_write(struct tty_struct * tty,const unsigned char * buf,int count)1342 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1343 int count)
1344 {
1345 struct hso_serial *serial = tty->driver_data;
1346 int space, tx_bytes;
1347 unsigned long flags;
1348
1349 /* sanity check */
1350 if (serial == NULL) {
1351 pr_err("%s: serial is NULL\n", __func__);
1352 return -ENODEV;
1353 }
1354
1355 spin_lock_irqsave(&serial->serial_lock, flags);
1356
1357 space = serial->tx_data_length - serial->tx_buffer_count;
1358 tx_bytes = (count < space) ? count : space;
1359
1360 if (!tx_bytes)
1361 goto out;
1362
1363 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1364 serial->tx_buffer_count += tx_bytes;
1365
1366 out:
1367 spin_unlock_irqrestore(&serial->serial_lock, flags);
1368
1369 hso_kick_transmit(serial);
1370 /* done */
1371 return tx_bytes;
1372 }
1373
1374 /* how much room is there for writing */
hso_serial_write_room(struct tty_struct * tty)1375 static int hso_serial_write_room(struct tty_struct *tty)
1376 {
1377 struct hso_serial *serial = tty->driver_data;
1378 int room;
1379 unsigned long flags;
1380
1381 spin_lock_irqsave(&serial->serial_lock, flags);
1382 room = serial->tx_data_length - serial->tx_buffer_count;
1383 spin_unlock_irqrestore(&serial->serial_lock, flags);
1384
1385 /* return free room */
1386 return room;
1387 }
1388
hso_serial_cleanup(struct tty_struct * tty)1389 static void hso_serial_cleanup(struct tty_struct *tty)
1390 {
1391 struct hso_serial *serial = tty->driver_data;
1392
1393 if (!serial)
1394 return;
1395
1396 kref_put(&serial->parent->ref, hso_serial_ref_free);
1397 }
1398
1399 /* setup the term */
hso_serial_set_termios(struct tty_struct * tty,struct ktermios * old)1400 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1401 {
1402 struct hso_serial *serial = tty->driver_data;
1403 unsigned long flags;
1404
1405 if (old)
1406 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n",
1407 (unsigned int)tty->termios.c_cflag,
1408 (unsigned int)old->c_cflag);
1409
1410 /* the actual setup */
1411 spin_lock_irqsave(&serial->serial_lock, flags);
1412 if (serial->port.count)
1413 _hso_serial_set_termios(tty, old);
1414 else
1415 tty->termios = *old;
1416 spin_unlock_irqrestore(&serial->serial_lock, flags);
1417
1418 /* done */
1419 }
1420
1421 /* how many characters in the buffer */
hso_serial_chars_in_buffer(struct tty_struct * tty)1422 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1423 {
1424 struct hso_serial *serial = tty->driver_data;
1425 int chars;
1426 unsigned long flags;
1427
1428 /* sanity check */
1429 if (serial == NULL)
1430 return 0;
1431
1432 spin_lock_irqsave(&serial->serial_lock, flags);
1433 chars = serial->tx_buffer_count;
1434 spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436 return chars;
1437 }
tiocmget_submit_urb(struct hso_serial * serial,struct hso_tiocmget * tiocmget,struct usb_device * usb)1438 static int tiocmget_submit_urb(struct hso_serial *serial,
1439 struct hso_tiocmget *tiocmget,
1440 struct usb_device *usb)
1441 {
1442 int result;
1443
1444 if (serial->parent->usb_gone)
1445 return -ENODEV;
1446 usb_fill_int_urb(tiocmget->urb, usb,
1447 usb_rcvintpipe(usb,
1448 tiocmget->endp->
1449 bEndpointAddress & 0x7F),
1450 &tiocmget->serial_state_notification,
1451 sizeof(struct hso_serial_state_notification),
1452 tiocmget_intr_callback, serial,
1453 tiocmget->endp->bInterval);
1454 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1455 if (result) {
1456 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1457 result);
1458 }
1459 return result;
1460
1461 }
1462
tiocmget_intr_callback(struct urb * urb)1463 static void tiocmget_intr_callback(struct urb *urb)
1464 {
1465 struct hso_serial *serial = urb->context;
1466 struct hso_tiocmget *tiocmget;
1467 int status = urb->status;
1468 u16 UART_state_bitmap, prev_UART_state_bitmap;
1469 struct uart_icount *icount;
1470 struct hso_serial_state_notification *serial_state_notification;
1471 struct usb_device *usb;
1472 struct usb_interface *interface;
1473 int if_num;
1474
1475 /* Sanity checks */
1476 if (!serial)
1477 return;
1478 if (status) {
1479 handle_usb_error(status, __func__, serial->parent);
1480 return;
1481 }
1482
1483 /* tiocmget is only supported on HSO_PORT_MODEM */
1484 tiocmget = serial->tiocmget;
1485 if (!tiocmget)
1486 return;
1487 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1488
1489 usb = serial->parent->usb;
1490 interface = serial->parent->interface;
1491
1492 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1493
1494 /* wIndex should be the USB interface number of the port to which the
1495 * notification applies, which should always be the Modem port.
1496 */
1497 serial_state_notification = &tiocmget->serial_state_notification;
1498 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1499 serial_state_notification->bNotification != B_NOTIFICATION ||
1500 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1501 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1502 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1503 dev_warn(&usb->dev,
1504 "hso received invalid serial state notification\n");
1505 DUMP(serial_state_notification,
1506 sizeof(struct hso_serial_state_notification));
1507 } else {
1508 unsigned long flags;
1509
1510 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1511 UART_state_bitmap);
1512 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1513 icount = &tiocmget->icount;
1514 spin_lock_irqsave(&serial->serial_lock, flags);
1515 if ((UART_state_bitmap & B_OVERRUN) !=
1516 (prev_UART_state_bitmap & B_OVERRUN))
1517 icount->parity++;
1518 if ((UART_state_bitmap & B_PARITY) !=
1519 (prev_UART_state_bitmap & B_PARITY))
1520 icount->parity++;
1521 if ((UART_state_bitmap & B_FRAMING) !=
1522 (prev_UART_state_bitmap & B_FRAMING))
1523 icount->frame++;
1524 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1525 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1526 icount->rng++;
1527 if ((UART_state_bitmap & B_BREAK) !=
1528 (prev_UART_state_bitmap & B_BREAK))
1529 icount->brk++;
1530 if ((UART_state_bitmap & B_TX_CARRIER) !=
1531 (prev_UART_state_bitmap & B_TX_CARRIER))
1532 icount->dsr++;
1533 if ((UART_state_bitmap & B_RX_CARRIER) !=
1534 (prev_UART_state_bitmap & B_RX_CARRIER))
1535 icount->dcd++;
1536 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1537 spin_unlock_irqrestore(&serial->serial_lock, flags);
1538 tiocmget->intr_completed = 1;
1539 wake_up_interruptible(&tiocmget->waitq);
1540 }
1541 memset(serial_state_notification, 0,
1542 sizeof(struct hso_serial_state_notification));
1543 tiocmget_submit_urb(serial,
1544 tiocmget,
1545 serial->parent->usb);
1546 }
1547
1548 /*
1549 * next few functions largely stolen from drivers/serial/serial_core.c
1550 */
1551 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1552 * - mask passed in arg for lines of interest
1553 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1554 * Caller should use TIOCGICOUNT to see which one it was
1555 */
1556 static int
hso_wait_modem_status(struct hso_serial * serial,unsigned long arg)1557 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1558 {
1559 DECLARE_WAITQUEUE(wait, current);
1560 struct uart_icount cprev, cnow;
1561 struct hso_tiocmget *tiocmget;
1562 int ret;
1563
1564 tiocmget = serial->tiocmget;
1565 if (!tiocmget)
1566 return -ENOENT;
1567 /*
1568 * note the counters on entry
1569 */
1570 spin_lock_irq(&serial->serial_lock);
1571 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1572 spin_unlock_irq(&serial->serial_lock);
1573 add_wait_queue(&tiocmget->waitq, &wait);
1574 for (;;) {
1575 spin_lock_irq(&serial->serial_lock);
1576 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1577 spin_unlock_irq(&serial->serial_lock);
1578 set_current_state(TASK_INTERRUPTIBLE);
1579 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1580 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1581 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1582 ret = 0;
1583 break;
1584 }
1585 schedule();
1586 /* see if a signal did it */
1587 if (signal_pending(current)) {
1588 ret = -ERESTARTSYS;
1589 break;
1590 }
1591 cprev = cnow;
1592 }
1593 __set_current_state(TASK_RUNNING);
1594 remove_wait_queue(&tiocmget->waitq, &wait);
1595
1596 return ret;
1597 }
1598
1599 /*
1600 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1601 * Return: write counters to the user passed counter struct
1602 * NB: both 1->0 and 0->1 transitions are counted except for
1603 * RI where only 0->1 is counted.
1604 */
hso_get_count(struct tty_struct * tty,struct serial_icounter_struct * icount)1605 static int hso_get_count(struct tty_struct *tty,
1606 struct serial_icounter_struct *icount)
1607 {
1608 struct uart_icount cnow;
1609 struct hso_serial *serial = tty->driver_data;
1610 struct hso_tiocmget *tiocmget = serial->tiocmget;
1611
1612 memset(icount, 0, sizeof(struct serial_icounter_struct));
1613
1614 if (!tiocmget)
1615 return -ENOENT;
1616 spin_lock_irq(&serial->serial_lock);
1617 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1618 spin_unlock_irq(&serial->serial_lock);
1619
1620 icount->cts = cnow.cts;
1621 icount->dsr = cnow.dsr;
1622 icount->rng = cnow.rng;
1623 icount->dcd = cnow.dcd;
1624 icount->rx = cnow.rx;
1625 icount->tx = cnow.tx;
1626 icount->frame = cnow.frame;
1627 icount->overrun = cnow.overrun;
1628 icount->parity = cnow.parity;
1629 icount->brk = cnow.brk;
1630 icount->buf_overrun = cnow.buf_overrun;
1631
1632 return 0;
1633 }
1634
1635
hso_serial_tiocmget(struct tty_struct * tty)1636 static int hso_serial_tiocmget(struct tty_struct *tty)
1637 {
1638 int retval;
1639 struct hso_serial *serial = tty->driver_data;
1640 struct hso_tiocmget *tiocmget;
1641 u16 UART_state_bitmap;
1642
1643 /* sanity check */
1644 if (!serial) {
1645 hso_dbg(0x1, "no tty structures\n");
1646 return -EINVAL;
1647 }
1648 spin_lock_irq(&serial->serial_lock);
1649 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1650 ((serial->dtr_state) ? TIOCM_DTR : 0);
1651 tiocmget = serial->tiocmget;
1652 if (tiocmget) {
1653
1654 UART_state_bitmap = le16_to_cpu(
1655 tiocmget->prev_UART_state_bitmap);
1656 if (UART_state_bitmap & B_RING_SIGNAL)
1657 retval |= TIOCM_RNG;
1658 if (UART_state_bitmap & B_RX_CARRIER)
1659 retval |= TIOCM_CD;
1660 if (UART_state_bitmap & B_TX_CARRIER)
1661 retval |= TIOCM_DSR;
1662 }
1663 spin_unlock_irq(&serial->serial_lock);
1664 return retval;
1665 }
1666
hso_serial_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1667 static int hso_serial_tiocmset(struct tty_struct *tty,
1668 unsigned int set, unsigned int clear)
1669 {
1670 int val = 0;
1671 unsigned long flags;
1672 int if_num;
1673 struct hso_serial *serial = tty->driver_data;
1674 struct usb_interface *interface;
1675
1676 /* sanity check */
1677 if (!serial) {
1678 hso_dbg(0x1, "no tty structures\n");
1679 return -EINVAL;
1680 }
1681
1682 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1683 return -EINVAL;
1684
1685 interface = serial->parent->interface;
1686 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1687
1688 spin_lock_irqsave(&serial->serial_lock, flags);
1689 if (set & TIOCM_RTS)
1690 serial->rts_state = 1;
1691 if (set & TIOCM_DTR)
1692 serial->dtr_state = 1;
1693
1694 if (clear & TIOCM_RTS)
1695 serial->rts_state = 0;
1696 if (clear & TIOCM_DTR)
1697 serial->dtr_state = 0;
1698
1699 if (serial->dtr_state)
1700 val |= 0x01;
1701 if (serial->rts_state)
1702 val |= 0x02;
1703
1704 spin_unlock_irqrestore(&serial->serial_lock, flags);
1705
1706 return usb_control_msg(serial->parent->usb,
1707 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1708 0x21, val, if_num, NULL, 0,
1709 USB_CTRL_SET_TIMEOUT);
1710 }
1711
hso_serial_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1712 static int hso_serial_ioctl(struct tty_struct *tty,
1713 unsigned int cmd, unsigned long arg)
1714 {
1715 struct hso_serial *serial = tty->driver_data;
1716 int ret = 0;
1717 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1718
1719 if (!serial)
1720 return -ENODEV;
1721 switch (cmd) {
1722 case TIOCMIWAIT:
1723 ret = hso_wait_modem_status(serial, arg);
1724 break;
1725 default:
1726 ret = -ENOIOCTLCMD;
1727 break;
1728 }
1729 return ret;
1730 }
1731
1732
1733 /* starts a transmit */
hso_kick_transmit(struct hso_serial * serial)1734 static void hso_kick_transmit(struct hso_serial *serial)
1735 {
1736 unsigned long flags;
1737 int res;
1738
1739 spin_lock_irqsave(&serial->serial_lock, flags);
1740 if (!serial->tx_buffer_count)
1741 goto out;
1742
1743 if (serial->tx_urb_used)
1744 goto out;
1745
1746 /* Wakeup USB interface if necessary */
1747 if (hso_get_activity(serial->parent) == -EAGAIN)
1748 goto out;
1749
1750 /* Switch pointers around to avoid memcpy */
1751 swap(serial->tx_buffer, serial->tx_data);
1752 serial->tx_data_count = serial->tx_buffer_count;
1753 serial->tx_buffer_count = 0;
1754
1755 /* If serial->tx_data is set, it means we switched buffers */
1756 if (serial->tx_data && 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) */
mux_device_request(struct hso_serial * serial,u8 type,u16 port,struct urb * ctrl_urb,struct usb_ctrlrequest * ctrl_req,u8 * ctrl_urb_data,u32 size)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 */
hso_mux_serial_read(struct hso_serial * serial)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) */
intr_callback(struct urb * urb)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 unsigned long flags;
1857 int i;
1858
1859 usb_mark_last_busy(urb->dev);
1860
1861 /* sanity check */
1862 if (!shared_int)
1863 return;
1864
1865 /* status check */
1866 if (status) {
1867 handle_usb_error(status, __func__, NULL);
1868 return;
1869 }
1870 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1871
1872 /* what request? */
1873 port_req = urb->transfer_buffer;
1874 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1875 /* loop over all muxed ports to find the one sending this */
1876 for (i = 0; i < 8; i++) {
1877 /* max 8 channels on MUX */
1878 if (*port_req & (1 << i)) {
1879 serial = get_serial_by_shared_int_and_type(shared_int,
1880 (1 << i));
1881 if (serial != NULL) {
1882 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1883 i);
1884 spin_lock_irqsave(&serial->serial_lock, flags);
1885 if (serial->rx_state == RX_IDLE &&
1886 serial->port.count > 0) {
1887 /* Setup and send a ctrl req read on
1888 * port i */
1889 if (!serial->rx_urb_filled[0]) {
1890 serial->rx_state = RX_SENT;
1891 hso_mux_serial_read(serial);
1892 } else
1893 serial->rx_state = RX_PENDING;
1894 } else {
1895 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1896 i);
1897 }
1898 spin_unlock_irqrestore(&serial->serial_lock,
1899 flags);
1900 }
1901 }
1902 }
1903 /* Resubmit interrupt urb */
1904 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1905 }
1906
1907 /* called for writing to muxed serial port */
hso_mux_serial_write_data(struct hso_serial * serial)1908 static int hso_mux_serial_write_data(struct hso_serial *serial)
1909 {
1910 if (NULL == serial)
1911 return -EINVAL;
1912
1913 return mux_device_request(serial,
1914 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1915 serial->parent->port_spec & HSO_PORT_MASK,
1916 serial->tx_urb,
1917 &serial->ctrl_req_tx,
1918 serial->tx_data, serial->tx_data_count);
1919 }
1920
1921 /* write callback for Diag and CS port */
hso_std_serial_write_bulk_callback(struct urb * urb)1922 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1923 {
1924 struct hso_serial *serial = urb->context;
1925 int status = urb->status;
1926 unsigned long flags;
1927
1928 /* sanity check */
1929 if (!serial) {
1930 hso_dbg(0x1, "serial == NULL\n");
1931 return;
1932 }
1933
1934 spin_lock_irqsave(&serial->serial_lock, flags);
1935 serial->tx_urb_used = 0;
1936 spin_unlock_irqrestore(&serial->serial_lock, flags);
1937 if (status) {
1938 handle_usb_error(status, __func__, serial->parent);
1939 return;
1940 }
1941 hso_put_activity(serial->parent);
1942 tty_port_tty_wakeup(&serial->port);
1943 hso_kick_transmit(serial);
1944
1945 hso_dbg(0x1, "\n");
1946 }
1947
1948 /* called for writing diag or CS serial port */
hso_std_serial_write_data(struct hso_serial * serial)1949 static int hso_std_serial_write_data(struct hso_serial *serial)
1950 {
1951 int count = serial->tx_data_count;
1952 int result;
1953
1954 usb_fill_bulk_urb(serial->tx_urb,
1955 serial->parent->usb,
1956 usb_sndbulkpipe(serial->parent->usb,
1957 serial->out_endp->
1958 bEndpointAddress & 0x7F),
1959 serial->tx_data, serial->tx_data_count,
1960 hso_std_serial_write_bulk_callback, serial);
1961
1962 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1963 if (result) {
1964 dev_warn(&serial->parent->usb->dev,
1965 "Failed to submit urb - res %d\n", result);
1966 return result;
1967 }
1968
1969 return count;
1970 }
1971
1972 /* callback after read or write on muxed serial port */
ctrl_callback(struct urb * urb)1973 static void ctrl_callback(struct urb *urb)
1974 {
1975 struct hso_serial *serial = urb->context;
1976 struct usb_ctrlrequest *req;
1977 int status = urb->status;
1978 unsigned long flags;
1979
1980 /* sanity check */
1981 if (!serial)
1982 return;
1983
1984 spin_lock_irqsave(&serial->serial_lock, flags);
1985 serial->tx_urb_used = 0;
1986 spin_unlock_irqrestore(&serial->serial_lock, flags);
1987 if (status) {
1988 handle_usb_error(status, __func__, serial->parent);
1989 return;
1990 }
1991
1992 /* what request? */
1993 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1994 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1995 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1996 DUMP1(urb->transfer_buffer, urb->actual_length);
1997
1998 if (req->bRequestType ==
1999 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2000 /* response to a read command */
2001 serial->rx_urb_filled[0] = 1;
2002 spin_lock_irqsave(&serial->serial_lock, flags);
2003 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2004 spin_unlock_irqrestore(&serial->serial_lock, flags);
2005 } else {
2006 hso_put_activity(serial->parent);
2007 tty_port_tty_wakeup(&serial->port);
2008 /* response to a write command */
2009 hso_kick_transmit(serial);
2010 }
2011 }
2012
2013 /* handle RX data for serial port */
put_rxbuf_data(struct urb * urb,struct hso_serial * serial)2014 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2015 {
2016 struct tty_struct *tty;
2017 int count;
2018
2019 /* Sanity check */
2020 if (urb == NULL || serial == NULL) {
2021 hso_dbg(0x1, "serial = NULL\n");
2022 return -2;
2023 }
2024
2025 tty = tty_port_tty_get(&serial->port);
2026
2027 if (tty && tty_throttled(tty)) {
2028 tty_kref_put(tty);
2029 return -1;
2030 }
2031
2032 /* Push data to tty */
2033 hso_dbg(0x1, "data to push to tty\n");
2034 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2035 if (count >= urb->actual_length) {
2036 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2037 urb->actual_length);
2038 tty_flip_buffer_push(&serial->port);
2039 } else {
2040 dev_warn(&serial->parent->usb->dev,
2041 "dropping data, %d bytes lost\n", urb->actual_length);
2042 }
2043
2044 tty_kref_put(tty);
2045
2046 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2047
2048 return 0;
2049 }
2050
2051
2052 /* Base driver functions */
2053
hso_log_port(struct hso_device * hso_dev)2054 static void hso_log_port(struct hso_device *hso_dev)
2055 {
2056 char *port_type;
2057 char port_dev[20];
2058
2059 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2060 case HSO_PORT_CONTROL:
2061 port_type = "Control";
2062 break;
2063 case HSO_PORT_APP:
2064 port_type = "Application";
2065 break;
2066 case HSO_PORT_GPS:
2067 port_type = "GPS";
2068 break;
2069 case HSO_PORT_GPS_CONTROL:
2070 port_type = "GPS control";
2071 break;
2072 case HSO_PORT_APP2:
2073 port_type = "Application2";
2074 break;
2075 case HSO_PORT_PCSC:
2076 port_type = "PCSC";
2077 break;
2078 case HSO_PORT_DIAG:
2079 port_type = "Diagnostic";
2080 break;
2081 case HSO_PORT_DIAG2:
2082 port_type = "Diagnostic2";
2083 break;
2084 case HSO_PORT_MODEM:
2085 port_type = "Modem";
2086 break;
2087 case HSO_PORT_NETWORK:
2088 port_type = "Network";
2089 break;
2090 default:
2091 port_type = "Unknown";
2092 break;
2093 }
2094 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2095 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2096 } else
2097 sprintf(port_dev, "/dev/%s%d", tty_filename,
2098 dev2ser(hso_dev)->minor);
2099
2100 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2101 port_type, port_dev);
2102 }
2103
hso_start_net_device(struct hso_device * hso_dev)2104 static int hso_start_net_device(struct hso_device *hso_dev)
2105 {
2106 int i, result = 0;
2107 struct hso_net *hso_net = dev2net(hso_dev);
2108
2109 if (!hso_net)
2110 return -ENODEV;
2111
2112 /* send URBs for all read buffers */
2113 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2114
2115 /* Prep a receive URB */
2116 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2117 hso_dev->usb,
2118 usb_rcvbulkpipe(hso_dev->usb,
2119 hso_net->in_endp->
2120 bEndpointAddress & 0x7F),
2121 hso_net->mux_bulk_rx_buf_pool[i],
2122 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2123 hso_net);
2124
2125 /* Put it out there so the device can send us stuff */
2126 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2127 GFP_NOIO);
2128 if (result)
2129 dev_warn(&hso_dev->usb->dev,
2130 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2131 i, result);
2132 }
2133
2134 return result;
2135 }
2136
hso_stop_net_device(struct hso_device * hso_dev)2137 static int hso_stop_net_device(struct hso_device *hso_dev)
2138 {
2139 int i;
2140 struct hso_net *hso_net = dev2net(hso_dev);
2141
2142 if (!hso_net)
2143 return -ENODEV;
2144
2145 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2146 if (hso_net->mux_bulk_rx_urb_pool[i])
2147 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2148
2149 }
2150 if (hso_net->mux_bulk_tx_urb)
2151 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2152
2153 return 0;
2154 }
2155
hso_start_serial_device(struct hso_device * hso_dev,gfp_t flags)2156 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2157 {
2158 int i, result = 0;
2159 struct hso_serial *serial = dev2ser(hso_dev);
2160
2161 if (!serial)
2162 return -ENODEV;
2163
2164 /* If it is not the MUX port fill in and submit a bulk urb (already
2165 * allocated in hso_serial_start) */
2166 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2167 for (i = 0; i < serial->num_rx_urbs; i++) {
2168 usb_fill_bulk_urb(serial->rx_urb[i],
2169 serial->parent->usb,
2170 usb_rcvbulkpipe(serial->parent->usb,
2171 serial->in_endp->
2172 bEndpointAddress &
2173 0x7F),
2174 serial->rx_data[i],
2175 serial->rx_data_length,
2176 hso_std_serial_read_bulk_callback,
2177 serial);
2178 result = usb_submit_urb(serial->rx_urb[i], flags);
2179 if (result) {
2180 dev_warn(&serial->parent->usb->dev,
2181 "Failed to submit urb - res %d\n",
2182 result);
2183 break;
2184 }
2185 }
2186 } else {
2187 mutex_lock(&serial->shared_int->shared_int_lock);
2188 if (!serial->shared_int->use_count) {
2189 result =
2190 hso_mux_submit_intr_urb(serial->shared_int,
2191 hso_dev->usb, flags);
2192 }
2193 serial->shared_int->use_count++;
2194 mutex_unlock(&serial->shared_int->shared_int_lock);
2195 }
2196 if (serial->tiocmget)
2197 tiocmget_submit_urb(serial,
2198 serial->tiocmget,
2199 serial->parent->usb);
2200 return result;
2201 }
2202
hso_stop_serial_device(struct hso_device * hso_dev)2203 static int hso_stop_serial_device(struct hso_device *hso_dev)
2204 {
2205 int i;
2206 struct hso_serial *serial = dev2ser(hso_dev);
2207 struct hso_tiocmget *tiocmget;
2208
2209 if (!serial)
2210 return -ENODEV;
2211
2212 for (i = 0; i < serial->num_rx_urbs; i++) {
2213 if (serial->rx_urb[i]) {
2214 usb_kill_urb(serial->rx_urb[i]);
2215 serial->rx_urb_filled[i] = 0;
2216 }
2217 }
2218 serial->curr_rx_urb_idx = 0;
2219
2220 if (serial->tx_urb)
2221 usb_kill_urb(serial->tx_urb);
2222
2223 if (serial->shared_int) {
2224 mutex_lock(&serial->shared_int->shared_int_lock);
2225 if (serial->shared_int->use_count &&
2226 (--serial->shared_int->use_count == 0)) {
2227 struct urb *urb;
2228
2229 urb = serial->shared_int->shared_intr_urb;
2230 if (urb)
2231 usb_kill_urb(urb);
2232 }
2233 mutex_unlock(&serial->shared_int->shared_int_lock);
2234 }
2235 tiocmget = serial->tiocmget;
2236 if (tiocmget) {
2237 wake_up_interruptible(&tiocmget->waitq);
2238 usb_kill_urb(tiocmget->urb);
2239 }
2240
2241 return 0;
2242 }
2243
hso_serial_tty_unregister(struct hso_serial * serial)2244 static void hso_serial_tty_unregister(struct hso_serial *serial)
2245 {
2246 tty_unregister_device(tty_drv, serial->minor);
2247 }
2248
hso_serial_common_free(struct hso_serial * serial)2249 static void hso_serial_common_free(struct hso_serial *serial)
2250 {
2251 int i;
2252
2253 for (i = 0; i < serial->num_rx_urbs; i++) {
2254 /* unlink and free RX URB */
2255 usb_free_urb(serial->rx_urb[i]);
2256 /* free the RX buffer */
2257 kfree(serial->rx_data[i]);
2258 }
2259
2260 /* unlink and free TX URB */
2261 usb_free_urb(serial->tx_urb);
2262 kfree(serial->tx_buffer);
2263 kfree(serial->tx_data);
2264 tty_port_destroy(&serial->port);
2265 }
2266
hso_serial_common_create(struct hso_serial * serial,int num_urbs,int rx_size,int tx_size)2267 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2268 int rx_size, int tx_size)
2269 {
2270 int minor;
2271 int i;
2272
2273 tty_port_init(&serial->port);
2274
2275 minor = get_free_serial_index();
2276 if (minor < 0)
2277 goto exit2;
2278
2279 /* register our minor number */
2280 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2281 tty_drv, minor, &serial->parent->interface->dev,
2282 serial->parent, hso_serial_dev_groups);
2283 if (IS_ERR(serial->parent->dev))
2284 goto exit2;
2285
2286 /* fill in specific data for later use */
2287 serial->minor = minor;
2288 serial->magic = HSO_SERIAL_MAGIC;
2289 spin_lock_init(&serial->serial_lock);
2290 serial->num_rx_urbs = num_urbs;
2291
2292 /* RX, allocate urb and initialize */
2293
2294 /* prepare our RX buffer */
2295 serial->rx_data_length = rx_size;
2296 for (i = 0; i < serial->num_rx_urbs; i++) {
2297 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2298 if (!serial->rx_urb[i])
2299 goto exit;
2300 serial->rx_urb[i]->transfer_buffer = NULL;
2301 serial->rx_urb[i]->transfer_buffer_length = 0;
2302 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2303 GFP_KERNEL);
2304 if (!serial->rx_data[i])
2305 goto exit;
2306 }
2307
2308 /* TX, allocate urb and initialize */
2309 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2310 if (!serial->tx_urb)
2311 goto exit;
2312 serial->tx_urb->transfer_buffer = NULL;
2313 serial->tx_urb->transfer_buffer_length = 0;
2314 /* prepare our TX buffer */
2315 serial->tx_data_count = 0;
2316 serial->tx_buffer_count = 0;
2317 serial->tx_data_length = tx_size;
2318 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2319 if (!serial->tx_data)
2320 goto exit;
2321
2322 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2323 if (!serial->tx_buffer)
2324 goto exit;
2325
2326 return 0;
2327 exit:
2328 hso_serial_tty_unregister(serial);
2329 exit2:
2330 hso_serial_common_free(serial);
2331 return -1;
2332 }
2333
2334 /* Creates a general hso device */
hso_create_device(struct usb_interface * intf,int port_spec)2335 static struct hso_device *hso_create_device(struct usb_interface *intf,
2336 int port_spec)
2337 {
2338 struct hso_device *hso_dev;
2339
2340 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2341 if (!hso_dev)
2342 return NULL;
2343
2344 hso_dev->port_spec = port_spec;
2345 hso_dev->usb = interface_to_usbdev(intf);
2346 hso_dev->interface = intf;
2347 kref_init(&hso_dev->ref);
2348 mutex_init(&hso_dev->mutex);
2349
2350 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2351 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2352
2353 return hso_dev;
2354 }
2355
2356 /* Removes a network device in the network device table */
remove_net_device(struct hso_device * hso_dev)2357 static int remove_net_device(struct hso_device *hso_dev)
2358 {
2359 int i;
2360
2361 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2362 if (network_table[i] == hso_dev) {
2363 network_table[i] = NULL;
2364 break;
2365 }
2366 }
2367 if (i == HSO_MAX_NET_DEVICES)
2368 return -1;
2369 return 0;
2370 }
2371
2372 /* Frees our network device */
hso_free_net_device(struct hso_device * hso_dev,bool bailout)2373 static void hso_free_net_device(struct hso_device *hso_dev, bool bailout)
2374 {
2375 int i;
2376 struct hso_net *hso_net = dev2net(hso_dev);
2377
2378 if (!hso_net)
2379 return;
2380
2381 remove_net_device(hso_net->parent);
2382
2383 if (hso_net->net)
2384 unregister_netdev(hso_net->net);
2385
2386 /* start freeing */
2387 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2388 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2389 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2390 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2391 }
2392 usb_free_urb(hso_net->mux_bulk_tx_urb);
2393 kfree(hso_net->mux_bulk_tx_buf);
2394 hso_net->mux_bulk_tx_buf = NULL;
2395
2396 if (hso_net->net && !bailout)
2397 free_netdev(hso_net->net);
2398
2399 kfree(hso_dev);
2400 }
2401
2402 static const struct net_device_ops hso_netdev_ops = {
2403 .ndo_open = hso_net_open,
2404 .ndo_stop = hso_net_close,
2405 .ndo_start_xmit = hso_net_start_xmit,
2406 .ndo_tx_timeout = hso_net_tx_timeout,
2407 };
2408
2409 /* initialize the network interface */
hso_net_init(struct net_device * net)2410 static void hso_net_init(struct net_device *net)
2411 {
2412 struct hso_net *hso_net = netdev_priv(net);
2413
2414 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2415
2416 /* fill in the other fields */
2417 net->netdev_ops = &hso_netdev_ops;
2418 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2419 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2420 net->type = ARPHRD_NONE;
2421 net->mtu = DEFAULT_MTU - 14;
2422 net->tx_queue_len = 10;
2423 net->ethtool_ops = &ops;
2424
2425 /* and initialize the semaphore */
2426 spin_lock_init(&hso_net->net_lock);
2427 }
2428
2429 /* Adds a network device in the network device table */
add_net_device(struct hso_device * hso_dev)2430 static int add_net_device(struct hso_device *hso_dev)
2431 {
2432 int i;
2433
2434 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2435 if (network_table[i] == NULL) {
2436 network_table[i] = hso_dev;
2437 break;
2438 }
2439 }
2440 if (i == HSO_MAX_NET_DEVICES)
2441 return -1;
2442 return 0;
2443 }
2444
hso_rfkill_set_block(void * data,bool blocked)2445 static int hso_rfkill_set_block(void *data, bool blocked)
2446 {
2447 struct hso_device *hso_dev = data;
2448 int enabled = !blocked;
2449 int rv;
2450
2451 mutex_lock(&hso_dev->mutex);
2452 if (hso_dev->usb_gone)
2453 rv = 0;
2454 else
2455 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2456 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2457 USB_CTRL_SET_TIMEOUT);
2458 mutex_unlock(&hso_dev->mutex);
2459 return rv;
2460 }
2461
2462 static const struct rfkill_ops hso_rfkill_ops = {
2463 .set_block = hso_rfkill_set_block,
2464 };
2465
2466 /* Creates and sets up everything for rfkill */
hso_create_rfkill(struct hso_device * hso_dev,struct usb_interface * interface)2467 static void hso_create_rfkill(struct hso_device *hso_dev,
2468 struct usb_interface *interface)
2469 {
2470 struct hso_net *hso_net = dev2net(hso_dev);
2471 struct device *dev = &hso_net->net->dev;
2472 static u32 rfkill_counter;
2473
2474 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2475 rfkill_counter++);
2476
2477 hso_net->rfkill = rfkill_alloc(hso_net->name,
2478 &interface_to_usbdev(interface)->dev,
2479 RFKILL_TYPE_WWAN,
2480 &hso_rfkill_ops, hso_dev);
2481 if (!hso_net->rfkill) {
2482 dev_err(dev, "%s - Out of memory\n", __func__);
2483 return;
2484 }
2485 if (rfkill_register(hso_net->rfkill) < 0) {
2486 rfkill_destroy(hso_net->rfkill);
2487 hso_net->rfkill = NULL;
2488 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2489 return;
2490 }
2491 }
2492
2493 static struct device_type hso_type = {
2494 .name = "wwan",
2495 };
2496
2497 /* Creates our network device */
hso_create_net_device(struct usb_interface * interface,int port_spec)2498 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2499 int port_spec)
2500 {
2501 int result, i;
2502 struct net_device *net;
2503 struct hso_net *hso_net;
2504 struct hso_device *hso_dev;
2505
2506 hso_dev = hso_create_device(interface, port_spec);
2507 if (!hso_dev)
2508 return NULL;
2509
2510 /* allocate our network device, then we can put in our private data */
2511 /* call hso_net_init to do the basic initialization */
2512 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2513 hso_net_init);
2514 if (!net) {
2515 dev_err(&interface->dev, "Unable to create ethernet device\n");
2516 goto err_hso_dev;
2517 }
2518
2519 hso_net = netdev_priv(net);
2520
2521 hso_dev->port_data.dev_net = hso_net;
2522 hso_net->net = net;
2523 hso_net->parent = hso_dev;
2524
2525 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2526 USB_DIR_IN);
2527 if (!hso_net->in_endp) {
2528 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2529 goto err_net;
2530 }
2531 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2532 USB_DIR_OUT);
2533 if (!hso_net->out_endp) {
2534 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2535 goto err_net;
2536 }
2537 SET_NETDEV_DEV(net, &interface->dev);
2538 SET_NETDEV_DEVTYPE(net, &hso_type);
2539
2540 /* start allocating */
2541 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2542 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2543 if (!hso_net->mux_bulk_rx_urb_pool[i])
2544 goto err_mux_bulk_rx;
2545 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2546 GFP_KERNEL);
2547 if (!hso_net->mux_bulk_rx_buf_pool[i])
2548 goto err_mux_bulk_rx;
2549 }
2550 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2551 if (!hso_net->mux_bulk_tx_urb)
2552 goto err_mux_bulk_rx;
2553 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2554 if (!hso_net->mux_bulk_tx_buf)
2555 goto err_free_tx_urb;
2556
2557 add_net_device(hso_dev);
2558
2559 /* registering our net device */
2560 result = register_netdev(net);
2561 if (result) {
2562 dev_err(&interface->dev, "Failed to register device\n");
2563 goto err_free_tx_buf;
2564 }
2565
2566 hso_log_port(hso_dev);
2567
2568 hso_create_rfkill(hso_dev, interface);
2569
2570 return hso_dev;
2571
2572 err_free_tx_buf:
2573 remove_net_device(hso_dev);
2574 kfree(hso_net->mux_bulk_tx_buf);
2575 err_free_tx_urb:
2576 usb_free_urb(hso_net->mux_bulk_tx_urb);
2577 err_mux_bulk_rx:
2578 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2579 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2580 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2581 }
2582 err_net:
2583 free_netdev(net);
2584 err_hso_dev:
2585 kfree(hso_dev);
2586 return NULL;
2587 }
2588
hso_free_tiomget(struct hso_serial * serial)2589 static void hso_free_tiomget(struct hso_serial *serial)
2590 {
2591 struct hso_tiocmget *tiocmget;
2592 if (!serial)
2593 return;
2594 tiocmget = serial->tiocmget;
2595 if (tiocmget) {
2596 usb_free_urb(tiocmget->urb);
2597 tiocmget->urb = NULL;
2598 serial->tiocmget = NULL;
2599 kfree(tiocmget);
2600 }
2601 }
2602
2603 /* Frees an AT channel ( goes for both mux and non-mux ) */
hso_free_serial_device(struct hso_device * hso_dev)2604 static void hso_free_serial_device(struct hso_device *hso_dev)
2605 {
2606 struct hso_serial *serial = dev2ser(hso_dev);
2607
2608 if (!serial)
2609 return;
2610
2611 hso_serial_common_free(serial);
2612
2613 if (serial->shared_int) {
2614 mutex_lock(&serial->shared_int->shared_int_lock);
2615 if (--serial->shared_int->ref_count == 0)
2616 hso_free_shared_int(serial->shared_int);
2617 else
2618 mutex_unlock(&serial->shared_int->shared_int_lock);
2619 }
2620 hso_free_tiomget(serial);
2621 kfree(serial);
2622 kfree(hso_dev);
2623 }
2624
2625 /* Creates a bulk AT channel */
hso_create_bulk_serial_device(struct usb_interface * interface,int port)2626 static struct hso_device *hso_create_bulk_serial_device(
2627 struct usb_interface *interface, int port)
2628 {
2629 struct hso_device *hso_dev;
2630 struct hso_serial *serial;
2631 int num_urbs;
2632 struct hso_tiocmget *tiocmget;
2633
2634 hso_dev = hso_create_device(interface, port);
2635 if (!hso_dev)
2636 return NULL;
2637
2638 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2639 if (!serial)
2640 goto exit;
2641
2642 serial->parent = hso_dev;
2643 hso_dev->port_data.dev_serial = serial;
2644
2645 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2646 num_urbs = 2;
2647 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2648 GFP_KERNEL);
2649 /* it isn't going to break our heart if serial->tiocmget
2650 * allocation fails don't bother checking this.
2651 */
2652 if (serial->tiocmget) {
2653 tiocmget = serial->tiocmget;
2654 tiocmget->endp = hso_get_ep(interface,
2655 USB_ENDPOINT_XFER_INT,
2656 USB_DIR_IN);
2657 if (!tiocmget->endp) {
2658 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2659 goto exit;
2660 }
2661
2662 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2663 if (tiocmget->urb) {
2664 mutex_init(&tiocmget->mutex);
2665 init_waitqueue_head(&tiocmget->waitq);
2666 } else
2667 hso_free_tiomget(serial);
2668 }
2669 }
2670 else
2671 num_urbs = 1;
2672
2673 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2674 BULK_URB_TX_SIZE))
2675 goto exit;
2676
2677 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2678 USB_DIR_IN);
2679 if (!serial->in_endp) {
2680 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2681 goto exit2;
2682 }
2683
2684 if (!
2685 (serial->out_endp =
2686 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2687 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2688 goto exit2;
2689 }
2690
2691 serial->write_data = hso_std_serial_write_data;
2692
2693 /* and record this serial */
2694 set_serial_by_index(serial->minor, serial);
2695
2696 /* setup the proc dirs and files if needed */
2697 hso_log_port(hso_dev);
2698
2699 /* done, return it */
2700 return hso_dev;
2701
2702 exit2:
2703 hso_serial_tty_unregister(serial);
2704 hso_serial_common_free(serial);
2705 exit:
2706 hso_free_tiomget(serial);
2707 kfree(serial);
2708 kfree(hso_dev);
2709 return NULL;
2710 }
2711
2712 /* Creates a multiplexed AT channel */
2713 static
hso_create_mux_serial_device(struct usb_interface * interface,int port,struct hso_shared_int * mux)2714 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2715 int port,
2716 struct hso_shared_int *mux)
2717 {
2718 struct hso_device *hso_dev;
2719 struct hso_serial *serial;
2720 int port_spec;
2721
2722 port_spec = HSO_INTF_MUX;
2723 port_spec &= ~HSO_PORT_MASK;
2724
2725 port_spec |= hso_mux_to_port(port);
2726 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2727 return NULL;
2728
2729 hso_dev = hso_create_device(interface, port_spec);
2730 if (!hso_dev)
2731 return NULL;
2732
2733 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2734 if (!serial)
2735 goto exit;
2736
2737 hso_dev->port_data.dev_serial = serial;
2738 serial->parent = hso_dev;
2739
2740 if (hso_serial_common_create
2741 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2742 goto exit;
2743
2744 serial->tx_data_length--;
2745 serial->write_data = hso_mux_serial_write_data;
2746
2747 serial->shared_int = mux;
2748 mutex_lock(&serial->shared_int->shared_int_lock);
2749 serial->shared_int->ref_count++;
2750 mutex_unlock(&serial->shared_int->shared_int_lock);
2751
2752 /* and record this serial */
2753 set_serial_by_index(serial->minor, serial);
2754
2755 /* setup the proc dirs and files if needed */
2756 hso_log_port(hso_dev);
2757
2758 /* done, return it */
2759 return hso_dev;
2760
2761 exit:
2762 if (serial) {
2763 tty_unregister_device(tty_drv, serial->minor);
2764 kfree(serial);
2765 }
2766 kfree(hso_dev);
2767 return NULL;
2768
2769 }
2770
hso_free_shared_int(struct hso_shared_int * mux)2771 static void hso_free_shared_int(struct hso_shared_int *mux)
2772 {
2773 usb_free_urb(mux->shared_intr_urb);
2774 kfree(mux->shared_intr_buf);
2775 mutex_unlock(&mux->shared_int_lock);
2776 kfree(mux);
2777 }
2778
2779 static
hso_create_shared_int(struct usb_interface * interface)2780 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2781 {
2782 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2783
2784 if (!mux)
2785 return NULL;
2786
2787 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2788 USB_DIR_IN);
2789 if (!mux->intr_endp) {
2790 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2791 goto exit;
2792 }
2793
2794 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2795 if (!mux->shared_intr_urb)
2796 goto exit;
2797 mux->shared_intr_buf =
2798 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2799 GFP_KERNEL);
2800 if (!mux->shared_intr_buf)
2801 goto exit;
2802
2803 mutex_init(&mux->shared_int_lock);
2804
2805 return mux;
2806
2807 exit:
2808 kfree(mux->shared_intr_buf);
2809 usb_free_urb(mux->shared_intr_urb);
2810 kfree(mux);
2811 return NULL;
2812 }
2813
2814 /* Gets the port spec for a certain interface */
hso_get_config_data(struct usb_interface * interface)2815 static int hso_get_config_data(struct usb_interface *interface)
2816 {
2817 struct usb_device *usbdev = interface_to_usbdev(interface);
2818 u8 *config_data = kmalloc(17, GFP_KERNEL);
2819 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2820 s32 result;
2821
2822 if (!config_data)
2823 return -ENOMEM;
2824 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2825 0x86, 0xC0, 0, 0, config_data, 17,
2826 USB_CTRL_SET_TIMEOUT) != 0x11) {
2827 kfree(config_data);
2828 return -EIO;
2829 }
2830
2831 /* check if we have a valid interface */
2832 if (if_num > 16) {
2833 kfree(config_data);
2834 return -EINVAL;
2835 }
2836
2837 switch (config_data[if_num]) {
2838 case 0x0:
2839 result = 0;
2840 break;
2841 case 0x1:
2842 result = HSO_PORT_DIAG;
2843 break;
2844 case 0x2:
2845 result = HSO_PORT_GPS;
2846 break;
2847 case 0x3:
2848 result = HSO_PORT_GPS_CONTROL;
2849 break;
2850 case 0x4:
2851 result = HSO_PORT_APP;
2852 break;
2853 case 0x5:
2854 result = HSO_PORT_APP2;
2855 break;
2856 case 0x6:
2857 result = HSO_PORT_CONTROL;
2858 break;
2859 case 0x7:
2860 result = HSO_PORT_NETWORK;
2861 break;
2862 case 0x8:
2863 result = HSO_PORT_MODEM;
2864 break;
2865 case 0x9:
2866 result = HSO_PORT_MSD;
2867 break;
2868 case 0xa:
2869 result = HSO_PORT_PCSC;
2870 break;
2871 case 0xb:
2872 result = HSO_PORT_VOICE;
2873 break;
2874 default:
2875 result = 0;
2876 }
2877
2878 if (result)
2879 result |= HSO_INTF_BULK;
2880
2881 if (config_data[16] & 0x1)
2882 result |= HSO_INFO_CRC_BUG;
2883
2884 kfree(config_data);
2885 return result;
2886 }
2887
2888 /* called once for each interface upon device insertion */
hso_probe(struct usb_interface * interface,const struct usb_device_id * id)2889 static int hso_probe(struct usb_interface *interface,
2890 const struct usb_device_id *id)
2891 {
2892 int mux, i, if_num, port_spec;
2893 unsigned char port_mask;
2894 struct hso_device *hso_dev = NULL;
2895 struct hso_shared_int *shared_int;
2896 struct hso_device *tmp_dev = NULL;
2897
2898 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2899 dev_err(&interface->dev, "Not our interface\n");
2900 return -ENODEV;
2901 }
2902
2903 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2904
2905 /* Get the interface/port specification from either driver_info or from
2906 * the device itself */
2907 if (id->driver_info) {
2908 /* if_num is controlled by the device, driver_info is a 0 terminated
2909 * array. Make sure, the access is in bounds! */
2910 for (i = 0; i <= if_num; ++i)
2911 if (((u32 *)(id->driver_info))[i] == 0)
2912 goto exit;
2913 port_spec = ((u32 *)(id->driver_info))[if_num];
2914 } else {
2915 port_spec = hso_get_config_data(interface);
2916 if (port_spec < 0)
2917 goto exit;
2918 }
2919
2920 /* Check if we need to switch to alt interfaces prior to port
2921 * configuration */
2922 if (interface->num_altsetting > 1)
2923 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2924 interface->needs_remote_wakeup = 1;
2925
2926 /* Allocate new hso device(s) */
2927 switch (port_spec & HSO_INTF_MASK) {
2928 case HSO_INTF_MUX:
2929 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2930 /* Create the network device */
2931 if (!disable_net) {
2932 hso_dev = hso_create_net_device(interface,
2933 port_spec);
2934 if (!hso_dev)
2935 goto exit;
2936 tmp_dev = hso_dev;
2937 }
2938 }
2939
2940 if (hso_get_mux_ports(interface, &port_mask))
2941 /* TODO: de-allocate everything */
2942 goto exit;
2943
2944 shared_int = hso_create_shared_int(interface);
2945 if (!shared_int)
2946 goto exit;
2947
2948 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2949 if (port_mask & i) {
2950 hso_dev = hso_create_mux_serial_device(
2951 interface, i, shared_int);
2952 if (!hso_dev)
2953 goto exit;
2954 }
2955 }
2956
2957 if (tmp_dev)
2958 hso_dev = tmp_dev;
2959 break;
2960
2961 case HSO_INTF_BULK:
2962 /* It's a regular bulk interface */
2963 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2964 if (!disable_net)
2965 hso_dev =
2966 hso_create_net_device(interface, port_spec);
2967 } else {
2968 hso_dev =
2969 hso_create_bulk_serial_device(interface, port_spec);
2970 }
2971 if (!hso_dev)
2972 goto exit;
2973 break;
2974 default:
2975 goto exit;
2976 }
2977
2978 /* save our data pointer in this device */
2979 usb_set_intfdata(interface, hso_dev);
2980
2981 /* done */
2982 return 0;
2983 exit:
2984 hso_free_interface(interface);
2985 return -ENODEV;
2986 }
2987
2988 /* device removed, cleaning up */
hso_disconnect(struct usb_interface * interface)2989 static void hso_disconnect(struct usb_interface *interface)
2990 {
2991 hso_free_interface(interface);
2992
2993 /* remove reference of our private data */
2994 usb_set_intfdata(interface, NULL);
2995 }
2996
async_get_intf(struct work_struct * data)2997 static void async_get_intf(struct work_struct *data)
2998 {
2999 struct hso_device *hso_dev =
3000 container_of(data, struct hso_device, async_get_intf);
3001 usb_autopm_get_interface(hso_dev->interface);
3002 }
3003
async_put_intf(struct work_struct * data)3004 static void async_put_intf(struct work_struct *data)
3005 {
3006 struct hso_device *hso_dev =
3007 container_of(data, struct hso_device, async_put_intf);
3008 usb_autopm_put_interface(hso_dev->interface);
3009 }
3010
hso_get_activity(struct hso_device * hso_dev)3011 static int hso_get_activity(struct hso_device *hso_dev)
3012 {
3013 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3014 if (!hso_dev->is_active) {
3015 hso_dev->is_active = 1;
3016 schedule_work(&hso_dev->async_get_intf);
3017 }
3018 }
3019
3020 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3021 return -EAGAIN;
3022
3023 usb_mark_last_busy(hso_dev->usb);
3024
3025 return 0;
3026 }
3027
hso_put_activity(struct hso_device * hso_dev)3028 static int hso_put_activity(struct hso_device *hso_dev)
3029 {
3030 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3031 if (hso_dev->is_active) {
3032 hso_dev->is_active = 0;
3033 schedule_work(&hso_dev->async_put_intf);
3034 return -EAGAIN;
3035 }
3036 }
3037 hso_dev->is_active = 0;
3038 return 0;
3039 }
3040
3041 /* called by kernel when we need to suspend device */
hso_suspend(struct usb_interface * iface,pm_message_t message)3042 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3043 {
3044 int i, result;
3045
3046 /* Stop all serial ports */
3047 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3048 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3049 result = hso_stop_serial_device(serial_table[i]);
3050 if (result)
3051 goto out;
3052 }
3053 }
3054
3055 /* Stop all network ports */
3056 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3057 if (network_table[i] &&
3058 (network_table[i]->interface == iface)) {
3059 result = hso_stop_net_device(network_table[i]);
3060 if (result)
3061 goto out;
3062 }
3063 }
3064
3065 out:
3066 return 0;
3067 }
3068
3069 /* called by kernel when we need to resume device */
hso_resume(struct usb_interface * iface)3070 static int hso_resume(struct usb_interface *iface)
3071 {
3072 int i, result = 0;
3073 struct hso_net *hso_net;
3074
3075 /* Start all serial ports */
3076 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3077 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3078 if (dev2ser(serial_table[i])->port.count) {
3079 result =
3080 hso_start_serial_device(serial_table[i], GFP_NOIO);
3081 hso_kick_transmit(dev2ser(serial_table[i]));
3082 if (result)
3083 goto out;
3084 }
3085 }
3086 }
3087
3088 /* Start all network ports */
3089 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3090 if (network_table[i] &&
3091 (network_table[i]->interface == iface)) {
3092 hso_net = dev2net(network_table[i]);
3093 if (hso_net->flags & IFF_UP) {
3094 /* First transmit any lingering data,
3095 then restart the device. */
3096 if (hso_net->skb_tx_buf) {
3097 dev_dbg(&iface->dev,
3098 "Transmitting"
3099 " lingering data\n");
3100 hso_net_start_xmit(hso_net->skb_tx_buf,
3101 hso_net->net);
3102 hso_net->skb_tx_buf = NULL;
3103 }
3104 result = hso_start_net_device(network_table[i]);
3105 if (result)
3106 goto out;
3107 }
3108 }
3109 }
3110
3111 out:
3112 return result;
3113 }
3114
hso_serial_ref_free(struct kref * ref)3115 static void hso_serial_ref_free(struct kref *ref)
3116 {
3117 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3118
3119 hso_free_serial_device(hso_dev);
3120 }
3121
hso_free_interface(struct usb_interface * interface)3122 static void hso_free_interface(struct usb_interface *interface)
3123 {
3124 struct hso_serial *serial;
3125 int i;
3126
3127 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3128 if (serial_table[i] &&
3129 (serial_table[i]->interface == interface)) {
3130 serial = dev2ser(serial_table[i]);
3131 tty_port_tty_hangup(&serial->port, false);
3132 mutex_lock(&serial->parent->mutex);
3133 serial->parent->usb_gone = 1;
3134 mutex_unlock(&serial->parent->mutex);
3135 cancel_work_sync(&serial_table[i]->async_put_intf);
3136 cancel_work_sync(&serial_table[i]->async_get_intf);
3137 hso_serial_tty_unregister(serial);
3138 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3139 set_serial_by_index(i, NULL);
3140 }
3141 }
3142
3143 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3144 if (network_table[i] &&
3145 (network_table[i]->interface == interface)) {
3146 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3147 /* hso_stop_net_device doesn't stop the net queue since
3148 * traffic needs to start it again when suspended */
3149 netif_stop_queue(dev2net(network_table[i])->net);
3150 hso_stop_net_device(network_table[i]);
3151 cancel_work_sync(&network_table[i]->async_put_intf);
3152 cancel_work_sync(&network_table[i]->async_get_intf);
3153 if (rfk) {
3154 rfkill_unregister(rfk);
3155 rfkill_destroy(rfk);
3156 }
3157 hso_free_net_device(network_table[i], false);
3158 }
3159 }
3160 }
3161
3162 /* Helper functions */
3163
3164 /* Get the endpoint ! */
hso_get_ep(struct usb_interface * intf,int type,int dir)3165 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3166 int type, int dir)
3167 {
3168 int i;
3169 struct usb_host_interface *iface = intf->cur_altsetting;
3170 struct usb_endpoint_descriptor *endp;
3171
3172 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3173 endp = &iface->endpoint[i].desc;
3174 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3175 (usb_endpoint_type(endp) == type))
3176 return endp;
3177 }
3178
3179 return NULL;
3180 }
3181
3182 /* Get the byte that describes which ports are enabled */
hso_get_mux_ports(struct usb_interface * intf,unsigned char * ports)3183 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3184 {
3185 int i;
3186 struct usb_host_interface *iface = intf->cur_altsetting;
3187
3188 if (iface->extralen == 3) {
3189 *ports = iface->extra[2];
3190 return 0;
3191 }
3192
3193 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3194 if (iface->endpoint[i].extralen == 3) {
3195 *ports = iface->endpoint[i].extra[2];
3196 return 0;
3197 }
3198 }
3199
3200 return -1;
3201 }
3202
3203 /* interrupt urb needs to be submitted, used for serial read of muxed port */
hso_mux_submit_intr_urb(struct hso_shared_int * shared_int,struct usb_device * usb,gfp_t gfp)3204 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3205 struct usb_device *usb, gfp_t gfp)
3206 {
3207 int result;
3208
3209 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3210 usb_rcvintpipe(usb,
3211 shared_int->intr_endp->bEndpointAddress & 0x7F),
3212 shared_int->shared_intr_buf,
3213 1,
3214 intr_callback, shared_int,
3215 shared_int->intr_endp->bInterval);
3216
3217 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3218 if (result)
3219 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3220 result);
3221
3222 return result;
3223 }
3224
3225 /* operations setup of the serial interface */
3226 static const struct tty_operations hso_serial_ops = {
3227 .open = hso_serial_open,
3228 .close = hso_serial_close,
3229 .write = hso_serial_write,
3230 .write_room = hso_serial_write_room,
3231 .cleanup = hso_serial_cleanup,
3232 .ioctl = hso_serial_ioctl,
3233 .set_termios = hso_serial_set_termios,
3234 .chars_in_buffer = hso_serial_chars_in_buffer,
3235 .tiocmget = hso_serial_tiocmget,
3236 .tiocmset = hso_serial_tiocmset,
3237 .get_icount = hso_get_count,
3238 .unthrottle = hso_unthrottle
3239 };
3240
3241 static struct usb_driver hso_driver = {
3242 .name = driver_name,
3243 .probe = hso_probe,
3244 .disconnect = hso_disconnect,
3245 .id_table = hso_ids,
3246 .suspend = hso_suspend,
3247 .resume = hso_resume,
3248 .reset_resume = hso_resume,
3249 .supports_autosuspend = 1,
3250 .disable_hub_initiated_lpm = 1,
3251 };
3252
hso_init(void)3253 static int __init hso_init(void)
3254 {
3255 int i;
3256 int result;
3257
3258 /* put it in the log */
3259 pr_info("%s\n", version);
3260
3261 /* Initialise the serial table semaphore and table */
3262 spin_lock_init(&serial_table_lock);
3263 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3264 serial_table[i] = NULL;
3265
3266 /* allocate our driver using the proper amount of supported minors */
3267 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3268 if (!tty_drv)
3269 return -ENOMEM;
3270
3271 /* fill in all needed values */
3272 tty_drv->driver_name = driver_name;
3273 tty_drv->name = tty_filename;
3274
3275 /* if major number is provided as parameter, use that one */
3276 if (tty_major)
3277 tty_drv->major = tty_major;
3278
3279 tty_drv->minor_start = 0;
3280 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3281 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3282 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3283 tty_drv->init_termios = tty_std_termios;
3284 hso_init_termios(&tty_drv->init_termios);
3285 tty_set_operations(tty_drv, &hso_serial_ops);
3286
3287 /* register the tty driver */
3288 result = tty_register_driver(tty_drv);
3289 if (result) {
3290 pr_err("%s - tty_register_driver failed(%d)\n",
3291 __func__, result);
3292 goto err_free_tty;
3293 }
3294
3295 /* register this module as an usb driver */
3296 result = usb_register(&hso_driver);
3297 if (result) {
3298 pr_err("Could not register hso driver - error: %d\n", result);
3299 goto err_unreg_tty;
3300 }
3301
3302 /* done */
3303 return 0;
3304 err_unreg_tty:
3305 tty_unregister_driver(tty_drv);
3306 err_free_tty:
3307 put_tty_driver(tty_drv);
3308 return result;
3309 }
3310
hso_exit(void)3311 static void __exit hso_exit(void)
3312 {
3313 pr_info("unloaded\n");
3314
3315 tty_unregister_driver(tty_drv);
3316 /* deregister the usb driver */
3317 usb_deregister(&hso_driver);
3318 put_tty_driver(tty_drv);
3319 }
3320
3321 /* Module definitions */
3322 module_init(hso_init);
3323 module_exit(hso_exit);
3324
3325 MODULE_AUTHOR(MOD_AUTHOR);
3326 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3327 MODULE_LICENSE("GPL");
3328
3329 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3330 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3331 module_param(debug, int, 0644);
3332
3333 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3334 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3335 module_param(tty_major, int, 0644);
3336
3337 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3338 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3339 module_param(disable_net, int, 0644);
3340