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Merge branch 'for-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
[deliverable/linux.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/tty.h>
62 #include <linux/tty_driver.h>
63 #include <linux/tty_flip.h>
64 #include <linux/kmod.h>
65 #include <linux/rfkill.h>
66 #include <linux/ip.h>
67 #include <linux/uaccess.h>
68 #include <linux/usb/cdc.h>
69 #include <net/arp.h>
70 #include <asm/byteorder.h>
71 #include <linux/serial_core.h>
72 #include <linux/serial.h>
73
74
75 #define MOD_AUTHOR "Option Wireless"
76 #define MOD_DESCRIPTION "USB High Speed Option driver"
77 #define MOD_LICENSE "GPL"
78
79 #define HSO_MAX_NET_DEVICES 10
80 #define HSO__MAX_MTU 2048
81 #define DEFAULT_MTU 1500
82 #define DEFAULT_MRU 1500
83
84 #define CTRL_URB_RX_SIZE 1024
85 #define CTRL_URB_TX_SIZE 64
86
87 #define BULK_URB_RX_SIZE 4096
88 #define BULK_URB_TX_SIZE 8192
89
90 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
91 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_RX_BUF_COUNT 4
93 #define USB_TYPE_OPTION_VENDOR 0x20
94
95 /* These definitions are used with the struct hso_net flags element */
96 /* - use *_bit operations on it. (bit indices not values.) */
97 #define HSO_NET_RUNNING 0
98
99 #define HSO_NET_TX_TIMEOUT (HZ*10)
100
101 #define HSO_SERIAL_MAGIC 0x48534f31
102
103 /* Number of ttys to handle */
104 #define HSO_SERIAL_TTY_MINORS 256
105
106 #define MAX_RX_URBS 2
107
108 /*****************************************************************************/
109 /* Debugging functions */
110 /*****************************************************************************/
111 #define D__(lvl_, fmt, arg...) \
112 do { \
113 printk(lvl_ "[%d:%s]: " fmt "\n", \
114 __LINE__, __func__, ## arg); \
115 } while (0)
116
117 #define D_(lvl, args...) \
118 do { \
119 if (lvl & debug) \
120 D__(KERN_INFO, args); \
121 } while (0)
122
123 #define D1(args...) D_(0x01, ##args)
124 #define D2(args...) D_(0x02, ##args)
125 #define D3(args...) D_(0x04, ##args)
126 #define D4(args...) D_(0x08, ##args)
127 #define D5(args...) D_(0x10, ##args)
128
129 /*****************************************************************************/
130 /* Enumerators */
131 /*****************************************************************************/
132 enum pkt_parse_state {
133 WAIT_IP,
134 WAIT_DATA,
135 WAIT_SYNC
136 };
137
138 /*****************************************************************************/
139 /* Structs */
140 /*****************************************************************************/
141
142 struct hso_shared_int {
143 struct usb_endpoint_descriptor *intr_endp;
144 void *shared_intr_buf;
145 struct urb *shared_intr_urb;
146 struct usb_device *usb;
147 int use_count;
148 int ref_count;
149 struct mutex shared_int_lock;
150 };
151
152 struct hso_net {
153 struct hso_device *parent;
154 struct net_device *net;
155 struct rfkill *rfkill;
156 char name[24];
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_LENGTH (0x2)
189
190 #define B_OVERRUN (0x1<<6)
191 #define B_PARITY (0x1<<5)
192 #define B_FRAMING (0x1<<4)
193 #define B_RING_SIGNAL (0x1<<3)
194 #define B_BREAK (0x1<<2)
195 #define B_TX_CARRIER (0x1<<1)
196 #define B_RX_CARRIER (0x1<<0)
197
198 struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
205 } __packed;
206
207 struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216 };
217
218
219 struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
245 enum rx_ctrl_state rx_state;
246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
250 struct tty_port port;
251 /* from usb_serial_port */
252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
255 struct hso_tiocmget *tiocmget;
256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
261 u8 rx_urb_filled[MAX_RX_URBS];
262 struct tasklet_struct unthrottle_tasklet;
263 };
264
265 struct hso_device {
266 union {
267 struct hso_serial *dev_serial;
268 struct hso_net *dev_net;
269 } port_data;
270
271 u32 port_spec;
272
273 u8 is_active;
274 u8 usb_gone;
275 struct work_struct async_get_intf;
276 struct work_struct async_put_intf;
277
278 struct usb_device *usb;
279 struct usb_interface *interface;
280
281 struct device *dev;
282 struct kref ref;
283 struct mutex mutex;
284 };
285
286 /* Type of interface */
287 #define HSO_INTF_MASK 0xFF00
288 #define HSO_INTF_MUX 0x0100
289 #define HSO_INTF_BULK 0x0200
290
291 /* Type of port */
292 #define HSO_PORT_MASK 0xFF
293 #define HSO_PORT_NO_PORT 0x0
294 #define HSO_PORT_CONTROL 0x1
295 #define HSO_PORT_APP 0x2
296 #define HSO_PORT_GPS 0x3
297 #define HSO_PORT_PCSC 0x4
298 #define HSO_PORT_APP2 0x5
299 #define HSO_PORT_GPS_CONTROL 0x6
300 #define HSO_PORT_MSD 0x7
301 #define HSO_PORT_VOICE 0x8
302 #define HSO_PORT_DIAG2 0x9
303 #define HSO_PORT_DIAG 0x10
304 #define HSO_PORT_MODEM 0x11
305 #define HSO_PORT_NETWORK 0x12
306
307 /* Additional device info */
308 #define HSO_INFO_MASK 0xFF000000
309 #define HSO_INFO_CRC_BUG 0x01000000
310
311 /*****************************************************************************/
312 /* Prototypes */
313 /*****************************************************************************/
314 /* Serial driver functions */
315 static int hso_serial_tiocmset(struct tty_struct *tty,
316 unsigned int set, unsigned int clear);
317 static void ctrl_callback(struct urb *urb);
318 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
319 static void hso_kick_transmit(struct hso_serial *serial);
320 /* Helper functions */
321 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
322 struct usb_device *usb, gfp_t gfp);
323 static void handle_usb_error(int status, const char *function,
324 struct hso_device *hso_dev);
325 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
326 int type, int dir);
327 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
328 static void hso_free_interface(struct usb_interface *intf);
329 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
330 static int hso_stop_serial_device(struct hso_device *hso_dev);
331 static int hso_start_net_device(struct hso_device *hso_dev);
332 static void hso_free_shared_int(struct hso_shared_int *shared_int);
333 static int hso_stop_net_device(struct hso_device *hso_dev);
334 static void hso_serial_ref_free(struct kref *ref);
335 static void hso_std_serial_read_bulk_callback(struct urb *urb);
336 static int hso_mux_serial_read(struct hso_serial *serial);
337 static void async_get_intf(struct work_struct *data);
338 static void async_put_intf(struct work_struct *data);
339 static int hso_put_activity(struct hso_device *hso_dev);
340 static int hso_get_activity(struct hso_device *hso_dev);
341 static void tiocmget_intr_callback(struct urb *urb);
342 /*****************************************************************************/
343 /* Helping functions */
344 /*****************************************************************************/
345
346 /* #define DEBUG */
347
348 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
349 {
350 return hso_dev->port_data.dev_net;
351 }
352
353 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
354 {
355 return hso_dev->port_data.dev_serial;
356 }
357
358 /* Debugging functions */
359 #ifdef DEBUG
360 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
361 unsigned int len)
362 {
363 static char name[255];
364
365 sprintf(name, "hso[%d:%s]", line_count, func_name);
366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
367 }
368
369 #define DUMP(buf_, len_) \
370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
371
372 #define DUMP1(buf_, len_) \
373 do { \
374 if (0x01 & debug) \
375 DUMP(buf_, len_); \
376 } while (0)
377 #else
378 #define DUMP(buf_, len_)
379 #define DUMP1(buf_, len_)
380 #endif
381
382 /* module parameters */
383 static int debug;
384 static int tty_major;
385 static int disable_net;
386
387 /* driver info */
388 static const char driver_name[] = "hso";
389 static const char tty_filename[] = "ttyHS";
390 static const char *version = __FILE__ ": " MOD_AUTHOR;
391 /* the usb driver itself (registered in hso_init) */
392 static struct usb_driver hso_driver;
393 /* serial structures */
394 static struct tty_driver *tty_drv;
395 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
396 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
397 static spinlock_t serial_table_lock;
398
399 static const s32 default_port_spec[] = {
400 HSO_INTF_MUX | HSO_PORT_NETWORK,
401 HSO_INTF_BULK | HSO_PORT_DIAG,
402 HSO_INTF_BULK | HSO_PORT_MODEM,
403 0
404 };
405
406 static const s32 icon321_port_spec[] = {
407 HSO_INTF_MUX | HSO_PORT_NETWORK,
408 HSO_INTF_BULK | HSO_PORT_DIAG2,
409 HSO_INTF_BULK | HSO_PORT_MODEM,
410 HSO_INTF_BULK | HSO_PORT_DIAG,
411 0
412 };
413
414 #define default_port_device(vendor, product) \
415 USB_DEVICE(vendor, product), \
416 .driver_info = (kernel_ulong_t)default_port_spec
417
418 #define icon321_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)icon321_port_spec
421
422 /* list of devices we support */
423 static const struct usb_device_id hso_ids[] = {
424 {default_port_device(0x0af0, 0x6711)},
425 {default_port_device(0x0af0, 0x6731)},
426 {default_port_device(0x0af0, 0x6751)},
427 {default_port_device(0x0af0, 0x6771)},
428 {default_port_device(0x0af0, 0x6791)},
429 {default_port_device(0x0af0, 0x6811)},
430 {default_port_device(0x0af0, 0x6911)},
431 {default_port_device(0x0af0, 0x6951)},
432 {default_port_device(0x0af0, 0x6971)},
433 {default_port_device(0x0af0, 0x7011)},
434 {default_port_device(0x0af0, 0x7031)},
435 {default_port_device(0x0af0, 0x7051)},
436 {default_port_device(0x0af0, 0x7071)},
437 {default_port_device(0x0af0, 0x7111)},
438 {default_port_device(0x0af0, 0x7211)},
439 {default_port_device(0x0af0, 0x7251)},
440 {default_port_device(0x0af0, 0x7271)},
441 {default_port_device(0x0af0, 0x7311)},
442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7701)},
453 {USB_DEVICE(0x0af0, 0x7706)},
454 {USB_DEVICE(0x0af0, 0x7801)},
455 {USB_DEVICE(0x0af0, 0x7901)},
456 {USB_DEVICE(0x0af0, 0x7A01)},
457 {USB_DEVICE(0x0af0, 0x7A05)},
458 {USB_DEVICE(0x0af0, 0x8200)},
459 {USB_DEVICE(0x0af0, 0x8201)},
460 {USB_DEVICE(0x0af0, 0x8300)},
461 {USB_DEVICE(0x0af0, 0x8302)},
462 {USB_DEVICE(0x0af0, 0x8304)},
463 {USB_DEVICE(0x0af0, 0x8400)},
464 {USB_DEVICE(0x0af0, 0x8600)},
465 {USB_DEVICE(0x0af0, 0x8800)},
466 {USB_DEVICE(0x0af0, 0x8900)},
467 {USB_DEVICE(0x0af0, 0x9000)},
468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
469 {USB_DEVICE(0x0af0, 0xd035)},
470 {USB_DEVICE(0x0af0, 0xd055)},
471 {USB_DEVICE(0x0af0, 0xd155)},
472 {USB_DEVICE(0x0af0, 0xd255)},
473 {USB_DEVICE(0x0af0, 0xd057)},
474 {USB_DEVICE(0x0af0, 0xd157)},
475 {USB_DEVICE(0x0af0, 0xd257)},
476 {USB_DEVICE(0x0af0, 0xd357)},
477 {USB_DEVICE(0x0af0, 0xd058)},
478 {USB_DEVICE(0x0af0, 0xc100)},
479 {}
480 };
481 MODULE_DEVICE_TABLE(usb, hso_ids);
482
483 /* Sysfs attribute */
484 static ssize_t hso_sysfs_show_porttype(struct device *dev,
485 struct device_attribute *attr,
486 char *buf)
487 {
488 struct hso_device *hso_dev = dev_get_drvdata(dev);
489 char *port_name;
490
491 if (!hso_dev)
492 return 0;
493
494 switch (hso_dev->port_spec & HSO_PORT_MASK) {
495 case HSO_PORT_CONTROL:
496 port_name = "Control";
497 break;
498 case HSO_PORT_APP:
499 port_name = "Application";
500 break;
501 case HSO_PORT_APP2:
502 port_name = "Application2";
503 break;
504 case HSO_PORT_GPS:
505 port_name = "GPS";
506 break;
507 case HSO_PORT_GPS_CONTROL:
508 port_name = "GPS Control";
509 break;
510 case HSO_PORT_PCSC:
511 port_name = "PCSC";
512 break;
513 case HSO_PORT_DIAG:
514 port_name = "Diagnostic";
515 break;
516 case HSO_PORT_DIAG2:
517 port_name = "Diagnostic2";
518 break;
519 case HSO_PORT_MODEM:
520 port_name = "Modem";
521 break;
522 case HSO_PORT_NETWORK:
523 port_name = "Network";
524 break;
525 default:
526 port_name = "Unknown";
527 break;
528 }
529
530 return sprintf(buf, "%s\n", port_name);
531 }
532 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
533
534 static struct attribute *hso_serial_dev_attrs[] = {
535 &dev_attr_hsotype.attr,
536 NULL
537 };
538
539 ATTRIBUTE_GROUPS(hso_serial_dev);
540
541 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
542 {
543 int idx;
544
545 for (idx = 0; idx < serial->num_rx_urbs; idx++)
546 if (serial->rx_urb[idx] == urb)
547 return idx;
548 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
549 return -1;
550 }
551
552 /* converts mux value to a port spec value */
553 static u32 hso_mux_to_port(int mux)
554 {
555 u32 result;
556
557 switch (mux) {
558 case 0x1:
559 result = HSO_PORT_CONTROL;
560 break;
561 case 0x2:
562 result = HSO_PORT_APP;
563 break;
564 case 0x4:
565 result = HSO_PORT_PCSC;
566 break;
567 case 0x8:
568 result = HSO_PORT_GPS;
569 break;
570 case 0x10:
571 result = HSO_PORT_APP2;
572 break;
573 default:
574 result = HSO_PORT_NO_PORT;
575 }
576 return result;
577 }
578
579 /* converts port spec value to a mux value */
580 static u32 hso_port_to_mux(int port)
581 {
582 u32 result;
583
584 switch (port & HSO_PORT_MASK) {
585 case HSO_PORT_CONTROL:
586 result = 0x0;
587 break;
588 case HSO_PORT_APP:
589 result = 0x1;
590 break;
591 case HSO_PORT_PCSC:
592 result = 0x2;
593 break;
594 case HSO_PORT_GPS:
595 result = 0x3;
596 break;
597 case HSO_PORT_APP2:
598 result = 0x4;
599 break;
600 default:
601 result = 0x0;
602 }
603 return result;
604 }
605
606 static struct hso_serial *get_serial_by_shared_int_and_type(
607 struct hso_shared_int *shared_int,
608 int mux)
609 {
610 int i, port;
611
612 port = hso_mux_to_port(mux);
613
614 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
615 if (serial_table[i] &&
616 (dev2ser(serial_table[i])->shared_int == shared_int) &&
617 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
618 return dev2ser(serial_table[i]);
619 }
620 }
621
622 return NULL;
623 }
624
625 static struct hso_serial *get_serial_by_index(unsigned index)
626 {
627 struct hso_serial *serial = NULL;
628 unsigned long flags;
629
630 spin_lock_irqsave(&serial_table_lock, flags);
631 if (serial_table[index])
632 serial = dev2ser(serial_table[index]);
633 spin_unlock_irqrestore(&serial_table_lock, flags);
634
635 return serial;
636 }
637
638 static int get_free_serial_index(void)
639 {
640 int index;
641 unsigned long flags;
642
643 spin_lock_irqsave(&serial_table_lock, flags);
644 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
645 if (serial_table[index] == NULL) {
646 spin_unlock_irqrestore(&serial_table_lock, flags);
647 return index;
648 }
649 }
650 spin_unlock_irqrestore(&serial_table_lock, flags);
651
652 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
653 return -1;
654 }
655
656 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
657 {
658 unsigned long flags;
659
660 spin_lock_irqsave(&serial_table_lock, flags);
661 if (serial)
662 serial_table[index] = serial->parent;
663 else
664 serial_table[index] = NULL;
665 spin_unlock_irqrestore(&serial_table_lock, flags);
666 }
667
668 static void handle_usb_error(int status, const char *function,
669 struct hso_device *hso_dev)
670 {
671 char *explanation;
672
673 switch (status) {
674 case -ENODEV:
675 explanation = "no device";
676 break;
677 case -ENOENT:
678 explanation = "endpoint not enabled";
679 break;
680 case -EPIPE:
681 explanation = "endpoint stalled";
682 break;
683 case -ENOSPC:
684 explanation = "not enough bandwidth";
685 break;
686 case -ESHUTDOWN:
687 explanation = "device disabled";
688 break;
689 case -EHOSTUNREACH:
690 explanation = "device suspended";
691 break;
692 case -EINVAL:
693 case -EAGAIN:
694 case -EFBIG:
695 case -EMSGSIZE:
696 explanation = "internal error";
697 break;
698 case -EILSEQ:
699 case -EPROTO:
700 case -ETIME:
701 case -ETIMEDOUT:
702 explanation = "protocol error";
703 if (hso_dev)
704 usb_queue_reset_device(hso_dev->interface);
705 break;
706 default:
707 explanation = "unknown status";
708 break;
709 }
710
711 /* log a meaningful explanation of an USB status */
712 D1("%s: received USB status - %s (%d)", function, explanation, status);
713 }
714
715 /* Network interface functions */
716
717 /* called when net interface is brought up by ifconfig */
718 static int hso_net_open(struct net_device *net)
719 {
720 struct hso_net *odev = netdev_priv(net);
721 unsigned long flags = 0;
722
723 if (!odev) {
724 dev_err(&net->dev, "No net device !\n");
725 return -ENODEV;
726 }
727
728 odev->skb_tx_buf = NULL;
729
730 /* setup environment */
731 spin_lock_irqsave(&odev->net_lock, flags);
732 odev->rx_parse_state = WAIT_IP;
733 odev->rx_buf_size = 0;
734 odev->rx_buf_missing = sizeof(struct iphdr);
735 spin_unlock_irqrestore(&odev->net_lock, flags);
736
737 /* We are up and running. */
738 set_bit(HSO_NET_RUNNING, &odev->flags);
739 hso_start_net_device(odev->parent);
740
741 /* Tell the kernel we are ready to start receiving from it */
742 netif_start_queue(net);
743
744 return 0;
745 }
746
747 /* called when interface is brought down by ifconfig */
748 static int hso_net_close(struct net_device *net)
749 {
750 struct hso_net *odev = netdev_priv(net);
751
752 /* we don't need the queue anymore */
753 netif_stop_queue(net);
754 /* no longer running */
755 clear_bit(HSO_NET_RUNNING, &odev->flags);
756
757 hso_stop_net_device(odev->parent);
758
759 /* done */
760 return 0;
761 }
762
763 /* USB tells is xmit done, we should start the netqueue again */
764 static void write_bulk_callback(struct urb *urb)
765 {
766 struct hso_net *odev = urb->context;
767 int status = urb->status;
768
769 /* Sanity check */
770 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
771 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
772 return;
773 }
774
775 /* Do we still have a valid kernel network device? */
776 if (!netif_device_present(odev->net)) {
777 dev_err(&urb->dev->dev, "%s: net device not present\n",
778 __func__);
779 return;
780 }
781
782 /* log status, but don't act on it, we don't need to resubmit anything
783 * anyhow */
784 if (status)
785 handle_usb_error(status, __func__, odev->parent);
786
787 hso_put_activity(odev->parent);
788
789 /* Tell the network interface we are ready for another frame */
790 netif_wake_queue(odev->net);
791 }
792
793 /* called by kernel when we need to transmit a packet */
794 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
795 struct net_device *net)
796 {
797 struct hso_net *odev = netdev_priv(net);
798 int result;
799
800 /* Tell the kernel, "No more frames 'til we are done with this one." */
801 netif_stop_queue(net);
802 if (hso_get_activity(odev->parent) == -EAGAIN) {
803 odev->skb_tx_buf = skb;
804 return NETDEV_TX_OK;
805 }
806
807 /* log if asked */
808 DUMP1(skb->data, skb->len);
809 /* Copy it from kernel memory to OUR memory */
810 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
811 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
812
813 /* Fill in the URB for shipping it out. */
814 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
815 odev->parent->usb,
816 usb_sndbulkpipe(odev->parent->usb,
817 odev->out_endp->
818 bEndpointAddress & 0x7F),
819 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
820 odev);
821
822 /* Deal with the Zero Length packet problem, I hope */
823 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
824
825 /* Send the URB on its merry way. */
826 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
827 if (result) {
828 dev_warn(&odev->parent->interface->dev,
829 "failed mux_bulk_tx_urb %d\n", result);
830 net->stats.tx_errors++;
831 netif_start_queue(net);
832 } else {
833 net->stats.tx_packets++;
834 net->stats.tx_bytes += skb->len;
835 }
836 dev_kfree_skb(skb);
837 /* we're done */
838 return NETDEV_TX_OK;
839 }
840
841 static const struct ethtool_ops ops = {
842 .get_link = ethtool_op_get_link
843 };
844
845 /* called when a packet did not ack after watchdogtimeout */
846 static void hso_net_tx_timeout(struct net_device *net)
847 {
848 struct hso_net *odev = netdev_priv(net);
849
850 if (!odev)
851 return;
852
853 /* Tell syslog we are hosed. */
854 dev_warn(&net->dev, "Tx timed out.\n");
855
856 /* Tear the waiting frame off the list */
857 if (odev->mux_bulk_tx_urb &&
858 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
859 usb_unlink_urb(odev->mux_bulk_tx_urb);
860
861 /* Update statistics */
862 net->stats.tx_errors++;
863 }
864
865 /* make a real packet from the received USB buffer */
866 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
867 unsigned int count, unsigned char is_eop)
868 {
869 unsigned short temp_bytes;
870 unsigned short buffer_offset = 0;
871 unsigned short frame_len;
872 unsigned char *tmp_rx_buf;
873
874 /* log if needed */
875 D1("Rx %d bytes", count);
876 DUMP(ip_pkt, min(128, (int)count));
877
878 while (count) {
879 switch (odev->rx_parse_state) {
880 case WAIT_IP:
881 /* waiting for IP header. */
882 /* wanted bytes - size of ip header */
883 temp_bytes =
884 (count <
885 odev->rx_buf_missing) ? count : odev->
886 rx_buf_missing;
887
888 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
889 odev->rx_buf_size, ip_pkt + buffer_offset,
890 temp_bytes);
891
892 odev->rx_buf_size += temp_bytes;
893 buffer_offset += temp_bytes;
894 odev->rx_buf_missing -= temp_bytes;
895 count -= temp_bytes;
896
897 if (!odev->rx_buf_missing) {
898 /* header is complete allocate an sk_buffer and
899 * continue to WAIT_DATA */
900 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
901
902 if ((frame_len > DEFAULT_MRU) ||
903 (frame_len < sizeof(struct iphdr))) {
904 dev_err(&odev->net->dev,
905 "Invalid frame (%d) length\n",
906 frame_len);
907 odev->rx_parse_state = WAIT_SYNC;
908 continue;
909 }
910 /* Allocate an sk_buff */
911 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
912 frame_len);
913 if (!odev->skb_rx_buf) {
914 /* We got no receive buffer. */
915 D1("could not allocate memory");
916 odev->rx_parse_state = WAIT_SYNC;
917 continue;
918 }
919
920 /* Copy what we got so far. make room for iphdr
921 * after tail. */
922 tmp_rx_buf =
923 skb_put(odev->skb_rx_buf,
924 sizeof(struct iphdr));
925 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
926 sizeof(struct iphdr));
927
928 /* ETH_HLEN */
929 odev->rx_buf_size = sizeof(struct iphdr);
930
931 /* Filip actually use .tot_len */
932 odev->rx_buf_missing =
933 frame_len - sizeof(struct iphdr);
934 odev->rx_parse_state = WAIT_DATA;
935 }
936 break;
937
938 case WAIT_DATA:
939 temp_bytes = (count < odev->rx_buf_missing)
940 ? count : odev->rx_buf_missing;
941
942 /* Copy the rest of the bytes that are left in the
943 * buffer into the waiting sk_buf. */
944 /* Make room for temp_bytes after tail. */
945 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
946 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
947
948 odev->rx_buf_missing -= temp_bytes;
949 count -= temp_bytes;
950 buffer_offset += temp_bytes;
951 odev->rx_buf_size += temp_bytes;
952 if (!odev->rx_buf_missing) {
953 /* Packet is complete. Inject into stack. */
954 /* We have IP packet here */
955 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
956 skb_reset_mac_header(odev->skb_rx_buf);
957
958 /* Ship it off to the kernel */
959 netif_rx(odev->skb_rx_buf);
960 /* No longer our buffer. */
961 odev->skb_rx_buf = NULL;
962
963 /* update out statistics */
964 odev->net->stats.rx_packets++;
965
966 odev->net->stats.rx_bytes += odev->rx_buf_size;
967
968 odev->rx_buf_size = 0;
969 odev->rx_buf_missing = sizeof(struct iphdr);
970 odev->rx_parse_state = WAIT_IP;
971 }
972 break;
973
974 case WAIT_SYNC:
975 D1(" W_S");
976 count = 0;
977 break;
978 default:
979 D1(" ");
980 count--;
981 break;
982 }
983 }
984
985 /* Recovery mechanism for WAIT_SYNC state. */
986 if (is_eop) {
987 if (odev->rx_parse_state == WAIT_SYNC) {
988 odev->rx_parse_state = WAIT_IP;
989 odev->rx_buf_size = 0;
990 odev->rx_buf_missing = sizeof(struct iphdr);
991 }
992 }
993 }
994
995 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
996 {
997 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
998 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
999
1000 if (((rest == 5) || (rest == 6)) &&
1001 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1002 crc_check, 4)) {
1003 urb->actual_length -= 4;
1004 }
1005 }
1006
1007 /* Moving data from usb to kernel (in interrupt state) */
1008 static void read_bulk_callback(struct urb *urb)
1009 {
1010 struct hso_net *odev = urb->context;
1011 struct net_device *net;
1012 int result;
1013 int status = urb->status;
1014
1015 /* is al ok? (Filip: Who's Al ?) */
1016 if (status) {
1017 handle_usb_error(status, __func__, odev->parent);
1018 return;
1019 }
1020
1021 /* Sanity check */
1022 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1023 D1("BULK IN callback but driver is not active!");
1024 return;
1025 }
1026 usb_mark_last_busy(urb->dev);
1027
1028 net = odev->net;
1029
1030 if (!netif_device_present(net)) {
1031 /* Somebody killed our network interface... */
1032 return;
1033 }
1034
1035 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1036 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1037
1038 /* do we even have a packet? */
1039 if (urb->actual_length) {
1040 /* Handle the IP stream, add header and push it onto network
1041 * stack if the packet is complete. */
1042 spin_lock(&odev->net_lock);
1043 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1044 (urb->transfer_buffer_length >
1045 urb->actual_length) ? 1 : 0);
1046 spin_unlock(&odev->net_lock);
1047 }
1048
1049 /* We are done with this URB, resubmit it. Prep the USB to wait for
1050 * another frame. Reuse same as received. */
1051 usb_fill_bulk_urb(urb,
1052 odev->parent->usb,
1053 usb_rcvbulkpipe(odev->parent->usb,
1054 odev->in_endp->
1055 bEndpointAddress & 0x7F),
1056 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1057 read_bulk_callback, odev);
1058
1059 /* Give this to the USB subsystem so it can tell us when more data
1060 * arrives. */
1061 result = usb_submit_urb(urb, GFP_ATOMIC);
1062 if (result)
1063 dev_warn(&odev->parent->interface->dev,
1064 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1065 result);
1066 }
1067
1068 /* Serial driver functions */
1069
1070 static void hso_init_termios(struct ktermios *termios)
1071 {
1072 /*
1073 * The default requirements for this device are:
1074 */
1075 termios->c_iflag &=
1076 ~(IGNBRK /* disable ignore break */
1077 | BRKINT /* disable break causes interrupt */
1078 | PARMRK /* disable mark parity errors */
1079 | ISTRIP /* disable clear high bit of input characters */
1080 | INLCR /* disable translate NL to CR */
1081 | IGNCR /* disable ignore CR */
1082 | ICRNL /* disable translate CR to NL */
1083 | IXON); /* disable enable XON/XOFF flow control */
1084
1085 /* disable postprocess output characters */
1086 termios->c_oflag &= ~OPOST;
1087
1088 termios->c_lflag &=
1089 ~(ECHO /* disable echo input characters */
1090 | ECHONL /* disable echo new line */
1091 | ICANON /* disable erase, kill, werase, and rprnt
1092 special characters */
1093 | ISIG /* disable interrupt, quit, and suspend special
1094 characters */
1095 | IEXTEN); /* disable non-POSIX special characters */
1096
1097 termios->c_cflag &=
1098 ~(CSIZE /* no size */
1099 | PARENB /* disable parity bit */
1100 | CBAUD /* clear current baud rate */
1101 | CBAUDEX); /* clear current buad rate */
1102
1103 termios->c_cflag |= CS8; /* character size 8 bits */
1104
1105 /* baud rate 115200 */
1106 tty_termios_encode_baud_rate(termios, 115200, 115200);
1107 }
1108
1109 static void _hso_serial_set_termios(struct tty_struct *tty,
1110 struct ktermios *old)
1111 {
1112 struct hso_serial *serial = tty->driver_data;
1113
1114 if (!serial) {
1115 printk(KERN_ERR "%s: no tty structures", __func__);
1116 return;
1117 }
1118
1119 D4("port %d", serial->minor);
1120
1121 /*
1122 * Fix up unsupported bits
1123 */
1124 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1125
1126 tty->termios.c_cflag &=
1127 ~(CSIZE /* no size */
1128 | PARENB /* disable parity bit */
1129 | CBAUD /* clear current baud rate */
1130 | CBAUDEX); /* clear current buad rate */
1131
1132 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1133
1134 /* baud rate 115200 */
1135 tty_encode_baud_rate(tty, 115200, 115200);
1136 }
1137
1138 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1139 {
1140 int result;
1141 /* We are done with this URB, resubmit it. Prep the USB to wait for
1142 * another frame */
1143 usb_fill_bulk_urb(urb, serial->parent->usb,
1144 usb_rcvbulkpipe(serial->parent->usb,
1145 serial->in_endp->
1146 bEndpointAddress & 0x7F),
1147 urb->transfer_buffer, serial->rx_data_length,
1148 hso_std_serial_read_bulk_callback, serial);
1149 /* Give this to the USB subsystem so it can tell us when more data
1150 * arrives. */
1151 result = usb_submit_urb(urb, GFP_ATOMIC);
1152 if (result) {
1153 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1154 __func__, result);
1155 }
1156 }
1157
1158
1159
1160
1161 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1162 {
1163 int count;
1164 struct urb *curr_urb;
1165
1166 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1167 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1168 count = put_rxbuf_data(curr_urb, serial);
1169 if (count == -1)
1170 return;
1171 if (count == 0) {
1172 serial->curr_rx_urb_idx++;
1173 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1174 serial->curr_rx_urb_idx = 0;
1175 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1176 }
1177 }
1178 }
1179
1180 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1181 {
1182 int count = 0;
1183 struct urb *urb;
1184
1185 urb = serial->rx_urb[0];
1186 if (serial->port.count > 0) {
1187 count = put_rxbuf_data(urb, serial);
1188 if (count == -1)
1189 return;
1190 }
1191 /* Re issue a read as long as we receive data. */
1192
1193 if (count == 0 && ((urb->actual_length != 0) ||
1194 (serial->rx_state == RX_PENDING))) {
1195 serial->rx_state = RX_SENT;
1196 hso_mux_serial_read(serial);
1197 } else
1198 serial->rx_state = RX_IDLE;
1199 }
1200
1201
1202 /* read callback for Diag and CS port */
1203 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1204 {
1205 struct hso_serial *serial = urb->context;
1206 int status = urb->status;
1207
1208 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1209
1210 /* sanity check */
1211 if (!serial) {
1212 D1("serial == NULL");
1213 return;
1214 }
1215 if (status) {
1216 handle_usb_error(status, __func__, serial->parent);
1217 return;
1218 }
1219
1220 D1("Actual length = %d\n", urb->actual_length);
1221 DUMP1(urb->transfer_buffer, urb->actual_length);
1222
1223 /* Anyone listening? */
1224 if (serial->port.count == 0)
1225 return;
1226
1227 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1228 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1229 /* Valid data, handle RX data */
1230 spin_lock(&serial->serial_lock);
1231 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1232 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1233 spin_unlock(&serial->serial_lock);
1234 }
1235
1236 /*
1237 * This needs to be a tasklet otherwise we will
1238 * end up recursively calling this function.
1239 */
1240 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1241 {
1242 unsigned long flags;
1243
1244 spin_lock_irqsave(&serial->serial_lock, flags);
1245 if ((serial->parent->port_spec & HSO_INTF_MUX))
1246 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1247 else
1248 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1249 spin_unlock_irqrestore(&serial->serial_lock, flags);
1250 }
1251
1252 static void hso_unthrottle(struct tty_struct *tty)
1253 {
1254 struct hso_serial *serial = tty->driver_data;
1255
1256 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1257 }
1258
1259 /* open the requested serial port */
1260 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1261 {
1262 struct hso_serial *serial = get_serial_by_index(tty->index);
1263 int result;
1264
1265 /* sanity check */
1266 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1267 WARN_ON(1);
1268 tty->driver_data = NULL;
1269 D1("Failed to open port");
1270 return -ENODEV;
1271 }
1272
1273 mutex_lock(&serial->parent->mutex);
1274 result = usb_autopm_get_interface(serial->parent->interface);
1275 if (result < 0)
1276 goto err_out;
1277
1278 D1("Opening %d", serial->minor);
1279
1280 /* setup */
1281 tty->driver_data = serial;
1282 tty_port_tty_set(&serial->port, tty);
1283
1284 /* check for port already opened, if not set the termios */
1285 serial->port.count++;
1286 if (serial->port.count == 1) {
1287 serial->rx_state = RX_IDLE;
1288 /* Force default termio settings */
1289 _hso_serial_set_termios(tty, NULL);
1290 tasklet_init(&serial->unthrottle_tasklet,
1291 (void (*)(unsigned long))hso_unthrottle_tasklet,
1292 (unsigned long)serial);
1293 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1294 if (result) {
1295 hso_stop_serial_device(serial->parent);
1296 serial->port.count--;
1297 } else {
1298 kref_get(&serial->parent->ref);
1299 }
1300 } else {
1301 D1("Port was already open");
1302 }
1303
1304 usb_autopm_put_interface(serial->parent->interface);
1305
1306 /* done */
1307 if (result)
1308 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1309 err_out:
1310 mutex_unlock(&serial->parent->mutex);
1311 return result;
1312 }
1313
1314 /* close the requested serial port */
1315 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1316 {
1317 struct hso_serial *serial = tty->driver_data;
1318 u8 usb_gone;
1319
1320 D1("Closing serial port");
1321
1322 /* Open failed, no close cleanup required */
1323 if (serial == NULL)
1324 return;
1325
1326 mutex_lock(&serial->parent->mutex);
1327 usb_gone = serial->parent->usb_gone;
1328
1329 if (!usb_gone)
1330 usb_autopm_get_interface(serial->parent->interface);
1331
1332 /* reset the rts and dtr */
1333 /* do the actual close */
1334 serial->port.count--;
1335
1336 if (serial->port.count <= 0) {
1337 serial->port.count = 0;
1338 tty_port_tty_set(&serial->port, NULL);
1339 if (!usb_gone)
1340 hso_stop_serial_device(serial->parent);
1341 tasklet_kill(&serial->unthrottle_tasklet);
1342 }
1343
1344 if (!usb_gone)
1345 usb_autopm_put_interface(serial->parent->interface);
1346
1347 mutex_unlock(&serial->parent->mutex);
1348 }
1349
1350 /* close the requested serial port */
1351 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1352 int count)
1353 {
1354 struct hso_serial *serial = tty->driver_data;
1355 int space, tx_bytes;
1356 unsigned long flags;
1357
1358 /* sanity check */
1359 if (serial == NULL) {
1360 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1361 return -ENODEV;
1362 }
1363
1364 spin_lock_irqsave(&serial->serial_lock, flags);
1365
1366 space = serial->tx_data_length - serial->tx_buffer_count;
1367 tx_bytes = (count < space) ? count : space;
1368
1369 if (!tx_bytes)
1370 goto out;
1371
1372 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1373 serial->tx_buffer_count += tx_bytes;
1374
1375 out:
1376 spin_unlock_irqrestore(&serial->serial_lock, flags);
1377
1378 hso_kick_transmit(serial);
1379 /* done */
1380 return tx_bytes;
1381 }
1382
1383 /* how much room is there for writing */
1384 static int hso_serial_write_room(struct tty_struct *tty)
1385 {
1386 struct hso_serial *serial = tty->driver_data;
1387 int room;
1388 unsigned long flags;
1389
1390 spin_lock_irqsave(&serial->serial_lock, flags);
1391 room = serial->tx_data_length - serial->tx_buffer_count;
1392 spin_unlock_irqrestore(&serial->serial_lock, flags);
1393
1394 /* return free room */
1395 return room;
1396 }
1397
1398 static void hso_serial_cleanup(struct tty_struct *tty)
1399 {
1400 struct hso_serial *serial = tty->driver_data;
1401
1402 if (!serial)
1403 return;
1404
1405 kref_put(&serial->parent->ref, hso_serial_ref_free);
1406 }
1407
1408 /* setup the term */
1409 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1410 {
1411 struct hso_serial *serial = tty->driver_data;
1412 unsigned long flags;
1413
1414 if (old)
1415 D5("Termios called with: cflags new[%d] - old[%d]",
1416 tty->termios.c_cflag, old->c_cflag);
1417
1418 /* the actual setup */
1419 spin_lock_irqsave(&serial->serial_lock, flags);
1420 if (serial->port.count)
1421 _hso_serial_set_termios(tty, old);
1422 else
1423 tty->termios = *old;
1424 spin_unlock_irqrestore(&serial->serial_lock, flags);
1425
1426 /* done */
1427 }
1428
1429 /* how many characters in the buffer */
1430 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1431 {
1432 struct hso_serial *serial = tty->driver_data;
1433 int chars;
1434 unsigned long flags;
1435
1436 /* sanity check */
1437 if (serial == NULL)
1438 return 0;
1439
1440 spin_lock_irqsave(&serial->serial_lock, flags);
1441 chars = serial->tx_buffer_count;
1442 spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444 return chars;
1445 }
1446 static int tiocmget_submit_urb(struct hso_serial *serial,
1447 struct hso_tiocmget *tiocmget,
1448 struct usb_device *usb)
1449 {
1450 int result;
1451
1452 if (serial->parent->usb_gone)
1453 return -ENODEV;
1454 usb_fill_int_urb(tiocmget->urb, usb,
1455 usb_rcvintpipe(usb,
1456 tiocmget->endp->
1457 bEndpointAddress & 0x7F),
1458 &tiocmget->serial_state_notification,
1459 sizeof(struct hso_serial_state_notification),
1460 tiocmget_intr_callback, serial,
1461 tiocmget->endp->bInterval);
1462 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1463 if (result) {
1464 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1465 result);
1466 }
1467 return result;
1468
1469 }
1470
1471 static void tiocmget_intr_callback(struct urb *urb)
1472 {
1473 struct hso_serial *serial = urb->context;
1474 struct hso_tiocmget *tiocmget;
1475 int status = urb->status;
1476 u16 UART_state_bitmap, prev_UART_state_bitmap;
1477 struct uart_icount *icount;
1478 struct hso_serial_state_notification *serial_state_notification;
1479 struct usb_device *usb;
1480 int if_num;
1481
1482 /* Sanity checks */
1483 if (!serial)
1484 return;
1485 if (status) {
1486 handle_usb_error(status, __func__, serial->parent);
1487 return;
1488 }
1489
1490 /* tiocmget is only supported on HSO_PORT_MODEM */
1491 tiocmget = serial->tiocmget;
1492 if (!tiocmget)
1493 return;
1494 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1495
1496 usb = serial->parent->usb;
1497 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1498
1499 /* wIndex should be the USB interface number of the port to which the
1500 * notification applies, which should always be the Modem port.
1501 */
1502 serial_state_notification = &tiocmget->serial_state_notification;
1503 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1504 serial_state_notification->bNotification != B_NOTIFICATION ||
1505 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1506 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1507 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1508 dev_warn(&usb->dev,
1509 "hso received invalid serial state notification\n");
1510 DUMP(serial_state_notification,
1511 sizeof(struct hso_serial_state_notification));
1512 } else {
1513
1514 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1515 UART_state_bitmap);
1516 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1517 icount = &tiocmget->icount;
1518 spin_lock(&serial->serial_lock);
1519 if ((UART_state_bitmap & B_OVERRUN) !=
1520 (prev_UART_state_bitmap & B_OVERRUN))
1521 icount->parity++;
1522 if ((UART_state_bitmap & B_PARITY) !=
1523 (prev_UART_state_bitmap & B_PARITY))
1524 icount->parity++;
1525 if ((UART_state_bitmap & B_FRAMING) !=
1526 (prev_UART_state_bitmap & B_FRAMING))
1527 icount->frame++;
1528 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1529 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1530 icount->rng++;
1531 if ((UART_state_bitmap & B_BREAK) !=
1532 (prev_UART_state_bitmap & B_BREAK))
1533 icount->brk++;
1534 if ((UART_state_bitmap & B_TX_CARRIER) !=
1535 (prev_UART_state_bitmap & B_TX_CARRIER))
1536 icount->dsr++;
1537 if ((UART_state_bitmap & B_RX_CARRIER) !=
1538 (prev_UART_state_bitmap & B_RX_CARRIER))
1539 icount->dcd++;
1540 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1541 spin_unlock(&serial->serial_lock);
1542 tiocmget->intr_completed = 1;
1543 wake_up_interruptible(&tiocmget->waitq);
1544 }
1545 memset(serial_state_notification, 0,
1546 sizeof(struct hso_serial_state_notification));
1547 tiocmget_submit_urb(serial,
1548 tiocmget,
1549 serial->parent->usb);
1550 }
1551
1552 /*
1553 * next few functions largely stolen from drivers/serial/serial_core.c
1554 */
1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1556 * - mask passed in arg for lines of interest
1557 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1558 * Caller should use TIOCGICOUNT to see which one it was
1559 */
1560 static int
1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1562 {
1563 DECLARE_WAITQUEUE(wait, current);
1564 struct uart_icount cprev, cnow;
1565 struct hso_tiocmget *tiocmget;
1566 int ret;
1567
1568 tiocmget = serial->tiocmget;
1569 if (!tiocmget)
1570 return -ENOENT;
1571 /*
1572 * note the counters on entry
1573 */
1574 spin_lock_irq(&serial->serial_lock);
1575 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1576 spin_unlock_irq(&serial->serial_lock);
1577 add_wait_queue(&tiocmget->waitq, &wait);
1578 for (;;) {
1579 spin_lock_irq(&serial->serial_lock);
1580 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1581 spin_unlock_irq(&serial->serial_lock);
1582 set_current_state(TASK_INTERRUPTIBLE);
1583 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1584 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1585 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1586 ret = 0;
1587 break;
1588 }
1589 schedule();
1590 /* see if a signal did it */
1591 if (signal_pending(current)) {
1592 ret = -ERESTARTSYS;
1593 break;
1594 }
1595 cprev = cnow;
1596 }
1597 __set_current_state(TASK_RUNNING);
1598 remove_wait_queue(&tiocmget->waitq, &wait);
1599
1600 return ret;
1601 }
1602
1603 /*
1604 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1605 * Return: write counters to the user passed counter struct
1606 * NB: both 1->0 and 0->1 transitions are counted except for
1607 * RI where only 0->1 is counted.
1608 */
1609 static int hso_get_count(struct tty_struct *tty,
1610 struct serial_icounter_struct *icount)
1611 {
1612 struct uart_icount cnow;
1613 struct hso_serial *serial = tty->driver_data;
1614 struct hso_tiocmget *tiocmget = serial->tiocmget;
1615
1616 memset(icount, 0, sizeof(struct serial_icounter_struct));
1617
1618 if (!tiocmget)
1619 return -ENOENT;
1620 spin_lock_irq(&serial->serial_lock);
1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622 spin_unlock_irq(&serial->serial_lock);
1623
1624 icount->cts = cnow.cts;
1625 icount->dsr = cnow.dsr;
1626 icount->rng = cnow.rng;
1627 icount->dcd = cnow.dcd;
1628 icount->rx = cnow.rx;
1629 icount->tx = cnow.tx;
1630 icount->frame = cnow.frame;
1631 icount->overrun = cnow.overrun;
1632 icount->parity = cnow.parity;
1633 icount->brk = cnow.brk;
1634 icount->buf_overrun = cnow.buf_overrun;
1635
1636 return 0;
1637 }
1638
1639
1640 static int hso_serial_tiocmget(struct tty_struct *tty)
1641 {
1642 int retval;
1643 struct hso_serial *serial = tty->driver_data;
1644 struct hso_tiocmget *tiocmget;
1645 u16 UART_state_bitmap;
1646
1647 /* sanity check */
1648 if (!serial) {
1649 D1("no tty structures");
1650 return -EINVAL;
1651 }
1652 spin_lock_irq(&serial->serial_lock);
1653 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1654 ((serial->dtr_state) ? TIOCM_DTR : 0);
1655 tiocmget = serial->tiocmget;
1656 if (tiocmget) {
1657
1658 UART_state_bitmap = le16_to_cpu(
1659 tiocmget->prev_UART_state_bitmap);
1660 if (UART_state_bitmap & B_RING_SIGNAL)
1661 retval |= TIOCM_RNG;
1662 if (UART_state_bitmap & B_RX_CARRIER)
1663 retval |= TIOCM_CD;
1664 if (UART_state_bitmap & B_TX_CARRIER)
1665 retval |= TIOCM_DSR;
1666 }
1667 spin_unlock_irq(&serial->serial_lock);
1668 return retval;
1669 }
1670
1671 static int hso_serial_tiocmset(struct tty_struct *tty,
1672 unsigned int set, unsigned int clear)
1673 {
1674 int val = 0;
1675 unsigned long flags;
1676 int if_num;
1677 struct hso_serial *serial = tty->driver_data;
1678
1679 /* sanity check */
1680 if (!serial) {
1681 D1("no tty structures");
1682 return -EINVAL;
1683 }
1684
1685 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1686 return -EINVAL;
1687
1688 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1689
1690 spin_lock_irqsave(&serial->serial_lock, flags);
1691 if (set & TIOCM_RTS)
1692 serial->rts_state = 1;
1693 if (set & TIOCM_DTR)
1694 serial->dtr_state = 1;
1695
1696 if (clear & TIOCM_RTS)
1697 serial->rts_state = 0;
1698 if (clear & TIOCM_DTR)
1699 serial->dtr_state = 0;
1700
1701 if (serial->dtr_state)
1702 val |= 0x01;
1703 if (serial->rts_state)
1704 val |= 0x02;
1705
1706 spin_unlock_irqrestore(&serial->serial_lock, flags);
1707
1708 return usb_control_msg(serial->parent->usb,
1709 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1710 0x21, val, if_num, NULL, 0,
1711 USB_CTRL_SET_TIMEOUT);
1712 }
1713
1714 static int hso_serial_ioctl(struct tty_struct *tty,
1715 unsigned int cmd, unsigned long arg)
1716 {
1717 struct hso_serial *serial = tty->driver_data;
1718 int ret = 0;
1719 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1720
1721 if (!serial)
1722 return -ENODEV;
1723 switch (cmd) {
1724 case TIOCMIWAIT:
1725 ret = hso_wait_modem_status(serial, arg);
1726 break;
1727 default:
1728 ret = -ENOIOCTLCMD;
1729 break;
1730 }
1731 return ret;
1732 }
1733
1734
1735 /* starts a transmit */
1736 static void hso_kick_transmit(struct hso_serial *serial)
1737 {
1738 u8 *temp;
1739 unsigned long flags;
1740 int res;
1741
1742 spin_lock_irqsave(&serial->serial_lock, flags);
1743 if (!serial->tx_buffer_count)
1744 goto out;
1745
1746 if (serial->tx_urb_used)
1747 goto out;
1748
1749 /* Wakeup USB interface if necessary */
1750 if (hso_get_activity(serial->parent) == -EAGAIN)
1751 goto out;
1752
1753 /* Switch pointers around to avoid memcpy */
1754 temp = serial->tx_buffer;
1755 serial->tx_buffer = serial->tx_data;
1756 serial->tx_data = temp;
1757 serial->tx_data_count = serial->tx_buffer_count;
1758 serial->tx_buffer_count = 0;
1759
1760 /* If temp is set, it means we switched buffers */
1761 if (temp && serial->write_data) {
1762 res = serial->write_data(serial);
1763 if (res >= 0)
1764 serial->tx_urb_used = 1;
1765 }
1766 out:
1767 spin_unlock_irqrestore(&serial->serial_lock, flags);
1768 }
1769
1770 /* make a request (for reading and writing data to muxed serial port) */
1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1772 struct urb *ctrl_urb,
1773 struct usb_ctrlrequest *ctrl_req,
1774 u8 *ctrl_urb_data, u32 size)
1775 {
1776 int result;
1777 int pipe;
1778
1779 /* Sanity check */
1780 if (!serial || !ctrl_urb || !ctrl_req) {
1781 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1782 return -EINVAL;
1783 }
1784
1785 /* initialize */
1786 ctrl_req->wValue = 0;
1787 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1788 ctrl_req->wLength = cpu_to_le16(size);
1789
1790 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1791 /* Reading command */
1792 ctrl_req->bRequestType = USB_DIR_IN |
1793 USB_TYPE_OPTION_VENDOR |
1794 USB_RECIP_INTERFACE;
1795 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1796 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1797 } else {
1798 /* Writing command */
1799 ctrl_req->bRequestType = USB_DIR_OUT |
1800 USB_TYPE_OPTION_VENDOR |
1801 USB_RECIP_INTERFACE;
1802 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1803 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1804 }
1805 /* syslog */
1806 D2("%s command (%02x) len: %d, port: %d",
1807 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1808 ctrl_req->bRequestType, ctrl_req->wLength, port);
1809
1810 /* Load ctrl urb */
1811 ctrl_urb->transfer_flags = 0;
1812 usb_fill_control_urb(ctrl_urb,
1813 serial->parent->usb,
1814 pipe,
1815 (u8 *) ctrl_req,
1816 ctrl_urb_data, size, ctrl_callback, serial);
1817 /* Send it on merry way */
1818 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1819 if (result) {
1820 dev_err(&ctrl_urb->dev->dev,
1821 "%s failed submit ctrl_urb %d type %d\n", __func__,
1822 result, type);
1823 return result;
1824 }
1825
1826 /* done */
1827 return size;
1828 }
1829
1830 /* called by intr_callback when read occurs */
1831 static int hso_mux_serial_read(struct hso_serial *serial)
1832 {
1833 if (!serial)
1834 return -EINVAL;
1835
1836 /* clean data */
1837 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1838 /* make the request */
1839
1840 if (serial->num_rx_urbs != 1) {
1841 dev_err(&serial->parent->interface->dev,
1842 "ERROR: mux'd reads with multiple buffers "
1843 "not possible\n");
1844 return 0;
1845 }
1846 return mux_device_request(serial,
1847 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1848 serial->parent->port_spec & HSO_PORT_MASK,
1849 serial->rx_urb[0],
1850 &serial->ctrl_req_rx,
1851 serial->rx_data[0], serial->rx_data_length);
1852 }
1853
1854 /* used for muxed serial port callback (muxed serial read) */
1855 static void intr_callback(struct urb *urb)
1856 {
1857 struct hso_shared_int *shared_int = urb->context;
1858 struct hso_serial *serial;
1859 unsigned char *port_req;
1860 int status = urb->status;
1861 int i;
1862
1863 usb_mark_last_busy(urb->dev);
1864
1865 /* sanity check */
1866 if (!shared_int)
1867 return;
1868
1869 /* status check */
1870 if (status) {
1871 handle_usb_error(status, __func__, NULL);
1872 return;
1873 }
1874 D4("\n--- Got intr callback 0x%02X ---", status);
1875
1876 /* what request? */
1877 port_req = urb->transfer_buffer;
1878 D4(" port_req = 0x%.2X\n", *port_req);
1879 /* loop over all muxed ports to find the one sending this */
1880 for (i = 0; i < 8; i++) {
1881 /* max 8 channels on MUX */
1882 if (*port_req & (1 << i)) {
1883 serial = get_serial_by_shared_int_and_type(shared_int,
1884 (1 << i));
1885 if (serial != NULL) {
1886 D1("Pending read interrupt on port %d\n", i);
1887 spin_lock(&serial->serial_lock);
1888 if (serial->rx_state == RX_IDLE &&
1889 serial->port.count > 0) {
1890 /* Setup and send a ctrl req read on
1891 * port i */
1892 if (!serial->rx_urb_filled[0]) {
1893 serial->rx_state = RX_SENT;
1894 hso_mux_serial_read(serial);
1895 } else
1896 serial->rx_state = RX_PENDING;
1897 } else {
1898 D1("Already a read pending on "
1899 "port %d or port not open\n", i);
1900 }
1901 spin_unlock(&serial->serial_lock);
1902 }
1903 }
1904 }
1905 /* Resubmit interrupt urb */
1906 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1907 }
1908
1909 /* called for writing to muxed serial port */
1910 static int hso_mux_serial_write_data(struct hso_serial *serial)
1911 {
1912 if (NULL == serial)
1913 return -EINVAL;
1914
1915 return mux_device_request(serial,
1916 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1917 serial->parent->port_spec & HSO_PORT_MASK,
1918 serial->tx_urb,
1919 &serial->ctrl_req_tx,
1920 serial->tx_data, serial->tx_data_count);
1921 }
1922
1923 /* write callback for Diag and CS port */
1924 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1925 {
1926 struct hso_serial *serial = urb->context;
1927 int status = urb->status;
1928
1929 /* sanity check */
1930 if (!serial) {
1931 D1("serial == NULL");
1932 return;
1933 }
1934
1935 spin_lock(&serial->serial_lock);
1936 serial->tx_urb_used = 0;
1937 spin_unlock(&serial->serial_lock);
1938 if (status) {
1939 handle_usb_error(status, __func__, serial->parent);
1940 return;
1941 }
1942 hso_put_activity(serial->parent);
1943 tty_port_tty_wakeup(&serial->port);
1944 hso_kick_transmit(serial);
1945
1946 D1(" ");
1947 }
1948
1949 /* called for writing diag or CS serial port */
1950 static int hso_std_serial_write_data(struct hso_serial *serial)
1951 {
1952 int count = serial->tx_data_count;
1953 int result;
1954
1955 usb_fill_bulk_urb(serial->tx_urb,
1956 serial->parent->usb,
1957 usb_sndbulkpipe(serial->parent->usb,
1958 serial->out_endp->
1959 bEndpointAddress & 0x7F),
1960 serial->tx_data, serial->tx_data_count,
1961 hso_std_serial_write_bulk_callback, serial);
1962
1963 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1964 if (result) {
1965 dev_warn(&serial->parent->usb->dev,
1966 "Failed to submit urb - res %d\n", result);
1967 return result;
1968 }
1969
1970 return count;
1971 }
1972
1973 /* callback after read or write on muxed serial port */
1974 static void ctrl_callback(struct urb *urb)
1975 {
1976 struct hso_serial *serial = urb->context;
1977 struct usb_ctrlrequest *req;
1978 int status = urb->status;
1979
1980 /* sanity check */
1981 if (!serial)
1982 return;
1983
1984 spin_lock(&serial->serial_lock);
1985 serial->tx_urb_used = 0;
1986 spin_unlock(&serial->serial_lock);
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 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1995 D4("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(&serial->serial_lock);
2003 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2004 spin_unlock(&serial->serial_lock);
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 */
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 D1("serial = NULL");
2022 return -2;
2023 }
2024
2025 tty = tty_port_tty_get(&serial->port);
2026
2027 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2028 tty_kref_put(tty);
2029 return -1;
2030 }
2031
2032 /* Push data to tty */
2033 D1("data to push to tty");
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
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
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
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
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
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
2244 static void hso_serial_tty_unregister(struct hso_serial *serial)
2245 {
2246 tty_unregister_device(tty_drv, serial->minor);
2247 }
2248
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
2267 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2268 int rx_size, int tx_size)
2269 {
2270 struct device *dev;
2271 int minor;
2272 int i;
2273
2274 tty_port_init(&serial->port);
2275
2276 minor = get_free_serial_index();
2277 if (minor < 0)
2278 goto exit;
2279
2280 /* register our minor number */
2281 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2282 tty_drv, minor, &serial->parent->interface->dev,
2283 serial->parent, hso_serial_dev_groups);
2284 dev = serial->parent->dev;
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 dev_err(dev, "Could not allocate urb?\n");
2300 goto exit;
2301 }
2302 serial->rx_urb[i]->transfer_buffer = NULL;
2303 serial->rx_urb[i]->transfer_buffer_length = 0;
2304 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2305 GFP_KERNEL);
2306 if (!serial->rx_data[i])
2307 goto exit;
2308 }
2309
2310 /* TX, allocate urb and initialize */
2311 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2312 if (!serial->tx_urb) {
2313 dev_err(dev, "Could not allocate urb?\n");
2314 goto exit;
2315 }
2316 serial->tx_urb->transfer_buffer = NULL;
2317 serial->tx_urb->transfer_buffer_length = 0;
2318 /* prepare our TX buffer */
2319 serial->tx_data_count = 0;
2320 serial->tx_buffer_count = 0;
2321 serial->tx_data_length = tx_size;
2322 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2323 if (!serial->tx_data)
2324 goto exit;
2325
2326 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2327 if (!serial->tx_buffer)
2328 goto exit;
2329
2330 return 0;
2331 exit:
2332 hso_serial_tty_unregister(serial);
2333 hso_serial_common_free(serial);
2334 return -1;
2335 }
2336
2337 /* Creates a general hso device */
2338 static struct hso_device *hso_create_device(struct usb_interface *intf,
2339 int port_spec)
2340 {
2341 struct hso_device *hso_dev;
2342
2343 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2344 if (!hso_dev)
2345 return NULL;
2346
2347 hso_dev->port_spec = port_spec;
2348 hso_dev->usb = interface_to_usbdev(intf);
2349 hso_dev->interface = intf;
2350 kref_init(&hso_dev->ref);
2351 mutex_init(&hso_dev->mutex);
2352
2353 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2354 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2355
2356 return hso_dev;
2357 }
2358
2359 /* Removes a network device in the network device table */
2360 static int remove_net_device(struct hso_device *hso_dev)
2361 {
2362 int i;
2363
2364 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2365 if (network_table[i] == hso_dev) {
2366 network_table[i] = NULL;
2367 break;
2368 }
2369 }
2370 if (i == HSO_MAX_NET_DEVICES)
2371 return -1;
2372 return 0;
2373 }
2374
2375 /* Frees our network device */
2376 static void hso_free_net_device(struct hso_device *hso_dev)
2377 {
2378 int i;
2379 struct hso_net *hso_net = dev2net(hso_dev);
2380
2381 if (!hso_net)
2382 return;
2383
2384 remove_net_device(hso_net->parent);
2385
2386 if (hso_net->net)
2387 unregister_netdev(hso_net->net);
2388
2389 /* start freeing */
2390 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2391 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2392 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2393 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2394 }
2395 usb_free_urb(hso_net->mux_bulk_tx_urb);
2396 kfree(hso_net->mux_bulk_tx_buf);
2397 hso_net->mux_bulk_tx_buf = NULL;
2398
2399 if (hso_net->net)
2400 free_netdev(hso_net->net);
2401
2402 kfree(hso_dev);
2403 }
2404
2405 static const struct net_device_ops hso_netdev_ops = {
2406 .ndo_open = hso_net_open,
2407 .ndo_stop = hso_net_close,
2408 .ndo_start_xmit = hso_net_start_xmit,
2409 .ndo_tx_timeout = hso_net_tx_timeout,
2410 };
2411
2412 /* initialize the network interface */
2413 static void hso_net_init(struct net_device *net)
2414 {
2415 struct hso_net *hso_net = netdev_priv(net);
2416
2417 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2418
2419 /* fill in the other fields */
2420 net->netdev_ops = &hso_netdev_ops;
2421 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2422 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2423 net->type = ARPHRD_NONE;
2424 net->mtu = DEFAULT_MTU - 14;
2425 net->tx_queue_len = 10;
2426 net->ethtool_ops = &ops;
2427
2428 /* and initialize the semaphore */
2429 spin_lock_init(&hso_net->net_lock);
2430 }
2431
2432 /* Adds a network device in the network device table */
2433 static int add_net_device(struct hso_device *hso_dev)
2434 {
2435 int i;
2436
2437 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2438 if (network_table[i] == NULL) {
2439 network_table[i] = hso_dev;
2440 break;
2441 }
2442 }
2443 if (i == HSO_MAX_NET_DEVICES)
2444 return -1;
2445 return 0;
2446 }
2447
2448 static int hso_rfkill_set_block(void *data, bool blocked)
2449 {
2450 struct hso_device *hso_dev = data;
2451 int enabled = !blocked;
2452 int rv;
2453
2454 mutex_lock(&hso_dev->mutex);
2455 if (hso_dev->usb_gone)
2456 rv = 0;
2457 else
2458 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2459 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2460 USB_CTRL_SET_TIMEOUT);
2461 mutex_unlock(&hso_dev->mutex);
2462 return rv;
2463 }
2464
2465 static const struct rfkill_ops hso_rfkill_ops = {
2466 .set_block = hso_rfkill_set_block,
2467 };
2468
2469 /* Creates and sets up everything for rfkill */
2470 static void hso_create_rfkill(struct hso_device *hso_dev,
2471 struct usb_interface *interface)
2472 {
2473 struct hso_net *hso_net = dev2net(hso_dev);
2474 struct device *dev = &hso_net->net->dev;
2475 static u32 rfkill_counter;
2476
2477 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2478 rfkill_counter++);
2479
2480 hso_net->rfkill = rfkill_alloc(hso_net->name,
2481 &interface_to_usbdev(interface)->dev,
2482 RFKILL_TYPE_WWAN,
2483 &hso_rfkill_ops, hso_dev);
2484 if (!hso_net->rfkill) {
2485 dev_err(dev, "%s - Out of memory\n", __func__);
2486 return;
2487 }
2488 if (rfkill_register(hso_net->rfkill) < 0) {
2489 rfkill_destroy(hso_net->rfkill);
2490 hso_net->rfkill = NULL;
2491 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2492 return;
2493 }
2494 }
2495
2496 static struct device_type hso_type = {
2497 .name = "wwan",
2498 };
2499
2500 /* Creates our network device */
2501 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2502 int port_spec)
2503 {
2504 int result, i;
2505 struct net_device *net;
2506 struct hso_net *hso_net;
2507 struct hso_device *hso_dev;
2508
2509 hso_dev = hso_create_device(interface, port_spec);
2510 if (!hso_dev)
2511 return NULL;
2512
2513 /* allocate our network device, then we can put in our private data */
2514 /* call hso_net_init to do the basic initialization */
2515 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2516 hso_net_init);
2517 if (!net) {
2518 dev_err(&interface->dev, "Unable to create ethernet device\n");
2519 goto exit;
2520 }
2521
2522 hso_net = netdev_priv(net);
2523
2524 hso_dev->port_data.dev_net = hso_net;
2525 hso_net->net = net;
2526 hso_net->parent = hso_dev;
2527
2528 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2529 USB_DIR_IN);
2530 if (!hso_net->in_endp) {
2531 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2532 goto exit;
2533 }
2534 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2535 USB_DIR_OUT);
2536 if (!hso_net->out_endp) {
2537 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2538 goto exit;
2539 }
2540 SET_NETDEV_DEV(net, &interface->dev);
2541 SET_NETDEV_DEVTYPE(net, &hso_type);
2542
2543 /* registering our net device */
2544 result = register_netdev(net);
2545 if (result) {
2546 dev_err(&interface->dev, "Failed to register device\n");
2547 goto exit;
2548 }
2549
2550 /* start allocating */
2551 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2552 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2553 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2554 dev_err(&interface->dev, "Could not allocate rx urb\n");
2555 goto exit;
2556 }
2557 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2558 GFP_KERNEL);
2559 if (!hso_net->mux_bulk_rx_buf_pool[i])
2560 goto exit;
2561 }
2562 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2563 if (!hso_net->mux_bulk_tx_urb) {
2564 dev_err(&interface->dev, "Could not allocate tx urb\n");
2565 goto exit;
2566 }
2567 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2568 if (!hso_net->mux_bulk_tx_buf)
2569 goto exit;
2570
2571 add_net_device(hso_dev);
2572
2573 hso_log_port(hso_dev);
2574
2575 hso_create_rfkill(hso_dev, interface);
2576
2577 return hso_dev;
2578 exit:
2579 hso_free_net_device(hso_dev);
2580 return NULL;
2581 }
2582
2583 static void hso_free_tiomget(struct hso_serial *serial)
2584 {
2585 struct hso_tiocmget *tiocmget;
2586 if (!serial)
2587 return;
2588 tiocmget = serial->tiocmget;
2589 if (tiocmget) {
2590 usb_free_urb(tiocmget->urb);
2591 tiocmget->urb = NULL;
2592 serial->tiocmget = NULL;
2593 kfree(tiocmget);
2594 }
2595 }
2596
2597 /* Frees an AT channel ( goes for both mux and non-mux ) */
2598 static void hso_free_serial_device(struct hso_device *hso_dev)
2599 {
2600 struct hso_serial *serial = dev2ser(hso_dev);
2601
2602 if (!serial)
2603 return;
2604
2605 hso_serial_common_free(serial);
2606
2607 if (serial->shared_int) {
2608 mutex_lock(&serial->shared_int->shared_int_lock);
2609 if (--serial->shared_int->ref_count == 0)
2610 hso_free_shared_int(serial->shared_int);
2611 else
2612 mutex_unlock(&serial->shared_int->shared_int_lock);
2613 }
2614 hso_free_tiomget(serial);
2615 kfree(serial);
2616 kfree(hso_dev);
2617 }
2618
2619 /* Creates a bulk AT channel */
2620 static struct hso_device *hso_create_bulk_serial_device(
2621 struct usb_interface *interface, int port)
2622 {
2623 struct hso_device *hso_dev;
2624 struct hso_serial *serial;
2625 int num_urbs;
2626 struct hso_tiocmget *tiocmget;
2627
2628 hso_dev = hso_create_device(interface, port);
2629 if (!hso_dev)
2630 return NULL;
2631
2632 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2633 if (!serial)
2634 goto exit;
2635
2636 serial->parent = hso_dev;
2637 hso_dev->port_data.dev_serial = serial;
2638
2639 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2640 num_urbs = 2;
2641 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2642 GFP_KERNEL);
2643 /* it isn't going to break our heart if serial->tiocmget
2644 * allocation fails don't bother checking this.
2645 */
2646 if (serial->tiocmget) {
2647 tiocmget = serial->tiocmget;
2648 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2649 if (tiocmget->urb) {
2650 mutex_init(&tiocmget->mutex);
2651 init_waitqueue_head(&tiocmget->waitq);
2652 tiocmget->endp = hso_get_ep(
2653 interface,
2654 USB_ENDPOINT_XFER_INT,
2655 USB_DIR_IN);
2656 } else
2657 hso_free_tiomget(serial);
2658 }
2659 }
2660 else
2661 num_urbs = 1;
2662
2663 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2664 BULK_URB_TX_SIZE))
2665 goto exit;
2666
2667 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2668 USB_DIR_IN);
2669 if (!serial->in_endp) {
2670 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2671 goto exit2;
2672 }
2673
2674 if (!
2675 (serial->out_endp =
2676 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2677 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2678 goto exit2;
2679 }
2680
2681 serial->write_data = hso_std_serial_write_data;
2682
2683 /* and record this serial */
2684 set_serial_by_index(serial->minor, serial);
2685
2686 /* setup the proc dirs and files if needed */
2687 hso_log_port(hso_dev);
2688
2689 /* done, return it */
2690 return hso_dev;
2691
2692 exit2:
2693 hso_serial_tty_unregister(serial);
2694 hso_serial_common_free(serial);
2695 exit:
2696 hso_free_tiomget(serial);
2697 kfree(serial);
2698 kfree(hso_dev);
2699 return NULL;
2700 }
2701
2702 /* Creates a multiplexed AT channel */
2703 static
2704 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2705 int port,
2706 struct hso_shared_int *mux)
2707 {
2708 struct hso_device *hso_dev;
2709 struct hso_serial *serial;
2710 int port_spec;
2711
2712 port_spec = HSO_INTF_MUX;
2713 port_spec &= ~HSO_PORT_MASK;
2714
2715 port_spec |= hso_mux_to_port(port);
2716 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2717 return NULL;
2718
2719 hso_dev = hso_create_device(interface, port_spec);
2720 if (!hso_dev)
2721 return NULL;
2722
2723 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2724 if (!serial)
2725 goto exit;
2726
2727 hso_dev->port_data.dev_serial = serial;
2728 serial->parent = hso_dev;
2729
2730 if (hso_serial_common_create
2731 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2732 goto exit;
2733
2734 serial->tx_data_length--;
2735 serial->write_data = hso_mux_serial_write_data;
2736
2737 serial->shared_int = mux;
2738 mutex_lock(&serial->shared_int->shared_int_lock);
2739 serial->shared_int->ref_count++;
2740 mutex_unlock(&serial->shared_int->shared_int_lock);
2741
2742 /* and record this serial */
2743 set_serial_by_index(serial->minor, serial);
2744
2745 /* setup the proc dirs and files if needed */
2746 hso_log_port(hso_dev);
2747
2748 /* done, return it */
2749 return hso_dev;
2750
2751 exit:
2752 if (serial) {
2753 tty_unregister_device(tty_drv, serial->minor);
2754 kfree(serial);
2755 }
2756 kfree(hso_dev);
2757 return NULL;
2758
2759 }
2760
2761 static void hso_free_shared_int(struct hso_shared_int *mux)
2762 {
2763 usb_free_urb(mux->shared_intr_urb);
2764 kfree(mux->shared_intr_buf);
2765 mutex_unlock(&mux->shared_int_lock);
2766 kfree(mux);
2767 }
2768
2769 static
2770 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2771 {
2772 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2773
2774 if (!mux)
2775 return NULL;
2776
2777 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2778 USB_DIR_IN);
2779 if (!mux->intr_endp) {
2780 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2781 goto exit;
2782 }
2783
2784 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2785 if (!mux->shared_intr_urb) {
2786 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2787 goto exit;
2788 }
2789 mux->shared_intr_buf =
2790 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2791 GFP_KERNEL);
2792 if (!mux->shared_intr_buf)
2793 goto exit;
2794
2795 mutex_init(&mux->shared_int_lock);
2796
2797 return mux;
2798
2799 exit:
2800 kfree(mux->shared_intr_buf);
2801 usb_free_urb(mux->shared_intr_urb);
2802 kfree(mux);
2803 return NULL;
2804 }
2805
2806 /* Gets the port spec for a certain interface */
2807 static int hso_get_config_data(struct usb_interface *interface)
2808 {
2809 struct usb_device *usbdev = interface_to_usbdev(interface);
2810 u8 *config_data = kmalloc(17, GFP_KERNEL);
2811 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2812 s32 result;
2813
2814 if (!config_data)
2815 return -ENOMEM;
2816 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2817 0x86, 0xC0, 0, 0, config_data, 17,
2818 USB_CTRL_SET_TIMEOUT) != 0x11) {
2819 kfree(config_data);
2820 return -EIO;
2821 }
2822
2823 switch (config_data[if_num]) {
2824 case 0x0:
2825 result = 0;
2826 break;
2827 case 0x1:
2828 result = HSO_PORT_DIAG;
2829 break;
2830 case 0x2:
2831 result = HSO_PORT_GPS;
2832 break;
2833 case 0x3:
2834 result = HSO_PORT_GPS_CONTROL;
2835 break;
2836 case 0x4:
2837 result = HSO_PORT_APP;
2838 break;
2839 case 0x5:
2840 result = HSO_PORT_APP2;
2841 break;
2842 case 0x6:
2843 result = HSO_PORT_CONTROL;
2844 break;
2845 case 0x7:
2846 result = HSO_PORT_NETWORK;
2847 break;
2848 case 0x8:
2849 result = HSO_PORT_MODEM;
2850 break;
2851 case 0x9:
2852 result = HSO_PORT_MSD;
2853 break;
2854 case 0xa:
2855 result = HSO_PORT_PCSC;
2856 break;
2857 case 0xb:
2858 result = HSO_PORT_VOICE;
2859 break;
2860 default:
2861 result = 0;
2862 }
2863
2864 if (result)
2865 result |= HSO_INTF_BULK;
2866
2867 if (config_data[16] & 0x1)
2868 result |= HSO_INFO_CRC_BUG;
2869
2870 kfree(config_data);
2871 return result;
2872 }
2873
2874 /* called once for each interface upon device insertion */
2875 static int hso_probe(struct usb_interface *interface,
2876 const struct usb_device_id *id)
2877 {
2878 int mux, i, if_num, port_spec;
2879 unsigned char port_mask;
2880 struct hso_device *hso_dev = NULL;
2881 struct hso_shared_int *shared_int;
2882 struct hso_device *tmp_dev = NULL;
2883
2884 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2885 dev_err(&interface->dev, "Not our interface\n");
2886 return -ENODEV;
2887 }
2888
2889 if_num = interface->altsetting->desc.bInterfaceNumber;
2890
2891 /* Get the interface/port specification from either driver_info or from
2892 * the device itself */
2893 if (id->driver_info)
2894 port_spec = ((u32 *)(id->driver_info))[if_num];
2895 else
2896 port_spec = hso_get_config_data(interface);
2897
2898 /* Check if we need to switch to alt interfaces prior to port
2899 * configuration */
2900 if (interface->num_altsetting > 1)
2901 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2902 interface->needs_remote_wakeup = 1;
2903
2904 /* Allocate new hso device(s) */
2905 switch (port_spec & HSO_INTF_MASK) {
2906 case HSO_INTF_MUX:
2907 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2908 /* Create the network device */
2909 if (!disable_net) {
2910 hso_dev = hso_create_net_device(interface,
2911 port_spec);
2912 if (!hso_dev)
2913 goto exit;
2914 tmp_dev = hso_dev;
2915 }
2916 }
2917
2918 if (hso_get_mux_ports(interface, &port_mask))
2919 /* TODO: de-allocate everything */
2920 goto exit;
2921
2922 shared_int = hso_create_shared_int(interface);
2923 if (!shared_int)
2924 goto exit;
2925
2926 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2927 if (port_mask & i) {
2928 hso_dev = hso_create_mux_serial_device(
2929 interface, i, shared_int);
2930 if (!hso_dev)
2931 goto exit;
2932 }
2933 }
2934
2935 if (tmp_dev)
2936 hso_dev = tmp_dev;
2937 break;
2938
2939 case HSO_INTF_BULK:
2940 /* It's a regular bulk interface */
2941 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2942 if (!disable_net)
2943 hso_dev =
2944 hso_create_net_device(interface, port_spec);
2945 } else {
2946 hso_dev =
2947 hso_create_bulk_serial_device(interface, port_spec);
2948 }
2949 if (!hso_dev)
2950 goto exit;
2951 break;
2952 default:
2953 goto exit;
2954 }
2955
2956 /* save our data pointer in this device */
2957 usb_set_intfdata(interface, hso_dev);
2958
2959 /* done */
2960 return 0;
2961 exit:
2962 hso_free_interface(interface);
2963 return -ENODEV;
2964 }
2965
2966 /* device removed, cleaning up */
2967 static void hso_disconnect(struct usb_interface *interface)
2968 {
2969 hso_free_interface(interface);
2970
2971 /* remove reference of our private data */
2972 usb_set_intfdata(interface, NULL);
2973 }
2974
2975 static void async_get_intf(struct work_struct *data)
2976 {
2977 struct hso_device *hso_dev =
2978 container_of(data, struct hso_device, async_get_intf);
2979 usb_autopm_get_interface(hso_dev->interface);
2980 }
2981
2982 static void async_put_intf(struct work_struct *data)
2983 {
2984 struct hso_device *hso_dev =
2985 container_of(data, struct hso_device, async_put_intf);
2986 usb_autopm_put_interface(hso_dev->interface);
2987 }
2988
2989 static int hso_get_activity(struct hso_device *hso_dev)
2990 {
2991 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2992 if (!hso_dev->is_active) {
2993 hso_dev->is_active = 1;
2994 schedule_work(&hso_dev->async_get_intf);
2995 }
2996 }
2997
2998 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2999 return -EAGAIN;
3000
3001 usb_mark_last_busy(hso_dev->usb);
3002
3003 return 0;
3004 }
3005
3006 static int hso_put_activity(struct hso_device *hso_dev)
3007 {
3008 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3009 if (hso_dev->is_active) {
3010 hso_dev->is_active = 0;
3011 schedule_work(&hso_dev->async_put_intf);
3012 return -EAGAIN;
3013 }
3014 }
3015 hso_dev->is_active = 0;
3016 return 0;
3017 }
3018
3019 /* called by kernel when we need to suspend device */
3020 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3021 {
3022 int i, result;
3023
3024 /* Stop all serial ports */
3025 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3026 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3027 result = hso_stop_serial_device(serial_table[i]);
3028 if (result)
3029 goto out;
3030 }
3031 }
3032
3033 /* Stop all network ports */
3034 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3035 if (network_table[i] &&
3036 (network_table[i]->interface == iface)) {
3037 result = hso_stop_net_device(network_table[i]);
3038 if (result)
3039 goto out;
3040 }
3041 }
3042
3043 out:
3044 return 0;
3045 }
3046
3047 /* called by kernel when we need to resume device */
3048 static int hso_resume(struct usb_interface *iface)
3049 {
3050 int i, result = 0;
3051 struct hso_net *hso_net;
3052
3053 /* Start all serial ports */
3054 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3055 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3056 if (dev2ser(serial_table[i])->port.count) {
3057 result =
3058 hso_start_serial_device(serial_table[i], GFP_NOIO);
3059 hso_kick_transmit(dev2ser(serial_table[i]));
3060 if (result)
3061 goto out;
3062 }
3063 }
3064 }
3065
3066 /* Start all network ports */
3067 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3068 if (network_table[i] &&
3069 (network_table[i]->interface == iface)) {
3070 hso_net = dev2net(network_table[i]);
3071 if (hso_net->flags & IFF_UP) {
3072 /* First transmit any lingering data,
3073 then restart the device. */
3074 if (hso_net->skb_tx_buf) {
3075 dev_dbg(&iface->dev,
3076 "Transmitting"
3077 " lingering data\n");
3078 hso_net_start_xmit(hso_net->skb_tx_buf,
3079 hso_net->net);
3080 hso_net->skb_tx_buf = NULL;
3081 }
3082 result = hso_start_net_device(network_table[i]);
3083 if (result)
3084 goto out;
3085 }
3086 }
3087 }
3088
3089 out:
3090 return result;
3091 }
3092
3093 static void hso_serial_ref_free(struct kref *ref)
3094 {
3095 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3096
3097 hso_free_serial_device(hso_dev);
3098 }
3099
3100 static void hso_free_interface(struct usb_interface *interface)
3101 {
3102 struct hso_serial *serial;
3103 int i;
3104
3105 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3106 if (serial_table[i] &&
3107 (serial_table[i]->interface == interface)) {
3108 serial = dev2ser(serial_table[i]);
3109 tty_port_tty_hangup(&serial->port, false);
3110 mutex_lock(&serial->parent->mutex);
3111 serial->parent->usb_gone = 1;
3112 mutex_unlock(&serial->parent->mutex);
3113 cancel_work_sync(&serial_table[i]->async_put_intf);
3114 cancel_work_sync(&serial_table[i]->async_get_intf);
3115 hso_serial_tty_unregister(serial);
3116 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3117 set_serial_by_index(i, NULL);
3118 }
3119 }
3120
3121 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3122 if (network_table[i] &&
3123 (network_table[i]->interface == interface)) {
3124 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3125 /* hso_stop_net_device doesn't stop the net queue since
3126 * traffic needs to start it again when suspended */
3127 netif_stop_queue(dev2net(network_table[i])->net);
3128 hso_stop_net_device(network_table[i]);
3129 cancel_work_sync(&network_table[i]->async_put_intf);
3130 cancel_work_sync(&network_table[i]->async_get_intf);
3131 if (rfk) {
3132 rfkill_unregister(rfk);
3133 rfkill_destroy(rfk);
3134 }
3135 hso_free_net_device(network_table[i]);
3136 }
3137 }
3138 }
3139
3140 /* Helper functions */
3141
3142 /* Get the endpoint ! */
3143 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3144 int type, int dir)
3145 {
3146 int i;
3147 struct usb_host_interface *iface = intf->cur_altsetting;
3148 struct usb_endpoint_descriptor *endp;
3149
3150 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3151 endp = &iface->endpoint[i].desc;
3152 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3153 (usb_endpoint_type(endp) == type))
3154 return endp;
3155 }
3156
3157 return NULL;
3158 }
3159
3160 /* Get the byte that describes which ports are enabled */
3161 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3162 {
3163 int i;
3164 struct usb_host_interface *iface = intf->cur_altsetting;
3165
3166 if (iface->extralen == 3) {
3167 *ports = iface->extra[2];
3168 return 0;
3169 }
3170
3171 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3172 if (iface->endpoint[i].extralen == 3) {
3173 *ports = iface->endpoint[i].extra[2];
3174 return 0;
3175 }
3176 }
3177
3178 return -1;
3179 }
3180
3181 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3182 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3183 struct usb_device *usb, gfp_t gfp)
3184 {
3185 int result;
3186
3187 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3188 usb_rcvintpipe(usb,
3189 shared_int->intr_endp->bEndpointAddress & 0x7F),
3190 shared_int->shared_intr_buf,
3191 1,
3192 intr_callback, shared_int,
3193 shared_int->intr_endp->bInterval);
3194
3195 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3196 if (result)
3197 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3198 result);
3199
3200 return result;
3201 }
3202
3203 /* operations setup of the serial interface */
3204 static const struct tty_operations hso_serial_ops = {
3205 .open = hso_serial_open,
3206 .close = hso_serial_close,
3207 .write = hso_serial_write,
3208 .write_room = hso_serial_write_room,
3209 .cleanup = hso_serial_cleanup,
3210 .ioctl = hso_serial_ioctl,
3211 .set_termios = hso_serial_set_termios,
3212 .chars_in_buffer = hso_serial_chars_in_buffer,
3213 .tiocmget = hso_serial_tiocmget,
3214 .tiocmset = hso_serial_tiocmset,
3215 .get_icount = hso_get_count,
3216 .unthrottle = hso_unthrottle
3217 };
3218
3219 static struct usb_driver hso_driver = {
3220 .name = driver_name,
3221 .probe = hso_probe,
3222 .disconnect = hso_disconnect,
3223 .id_table = hso_ids,
3224 .suspend = hso_suspend,
3225 .resume = hso_resume,
3226 .reset_resume = hso_resume,
3227 .supports_autosuspend = 1,
3228 .disable_hub_initiated_lpm = 1,
3229 };
3230
3231 static int __init hso_init(void)
3232 {
3233 int i;
3234 int result;
3235
3236 /* put it in the log */
3237 printk(KERN_INFO "hso: %s\n", version);
3238
3239 /* Initialise the serial table semaphore and table */
3240 spin_lock_init(&serial_table_lock);
3241 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3242 serial_table[i] = NULL;
3243
3244 /* allocate our driver using the proper amount of supported minors */
3245 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3246 if (!tty_drv)
3247 return -ENOMEM;
3248
3249 /* fill in all needed values */
3250 tty_drv->driver_name = driver_name;
3251 tty_drv->name = tty_filename;
3252
3253 /* if major number is provided as parameter, use that one */
3254 if (tty_major)
3255 tty_drv->major = tty_major;
3256
3257 tty_drv->minor_start = 0;
3258 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3259 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3260 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3261 tty_drv->init_termios = tty_std_termios;
3262 hso_init_termios(&tty_drv->init_termios);
3263 tty_set_operations(tty_drv, &hso_serial_ops);
3264
3265 /* register the tty driver */
3266 result = tty_register_driver(tty_drv);
3267 if (result) {
3268 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3269 __func__, result);
3270 goto err_free_tty;
3271 }
3272
3273 /* register this module as an usb driver */
3274 result = usb_register(&hso_driver);
3275 if (result) {
3276 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3277 result);
3278 goto err_unreg_tty;
3279 }
3280
3281 /* done */
3282 return 0;
3283 err_unreg_tty:
3284 tty_unregister_driver(tty_drv);
3285 err_free_tty:
3286 put_tty_driver(tty_drv);
3287 return result;
3288 }
3289
3290 static void __exit hso_exit(void)
3291 {
3292 printk(KERN_INFO "hso: unloaded\n");
3293
3294 tty_unregister_driver(tty_drv);
3295 put_tty_driver(tty_drv);
3296 /* deregister the usb driver */
3297 usb_deregister(&hso_driver);
3298 }
3299
3300 /* Module definitions */
3301 module_init(hso_init);
3302 module_exit(hso_exit);
3303
3304 MODULE_AUTHOR(MOD_AUTHOR);
3305 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3306 MODULE_LICENSE(MOD_LICENSE);
3307
3308 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3309 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3310 module_param(debug, int, S_IRUGO | S_IWUSR);
3311
3312 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3313 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3314 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3315
3316 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3317 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3318 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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